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geb-battery · 5 months

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What is the safety of power lithium batteries?

Safety of power lithium-ion batteries

Lithium-ion batteries have been widely used in small portable electronic devices such as mobile phones and laptops. Since the lithium-ion batteries used in these devices are small (1-2Ah or less) and most are single-cell batteries, battery safety concerns are not serious. Even so, in recent years, Japan's Sony has recalled about 100 million laptop batteries from around the world due to safety concerns. Occasionally, there have been incidents of mobile phone batteries exploding and catching fires. Lithium-ion batteries with a single battery capacity of 10Ah or even 100Ah can be used as a power source for electric bicycles, pure electric vehicles, hybrid vehicles, power tools, etc. Security issues have attracted global attention. Safety is a basic requirement for power lithium-ion batteries. According to the different power output performance, power lithium-ion batteries can be divided into energy type and power type. Energy-based power lithium batteries usually have a large capacity and can provide a relatively long-lasting energy supply for power equipment. They are typically used in battery electric vehicles, medium-sized or heavy-duty hybrid vehicles. The total energy of such batteries accounts for a large proportion of the energy distribution of the whole vehicle, often exceeding 10KW. This not only partially absorbs the energy from the vehicle's braking feedback, but also increases the vehicle's driving range in pure electric mode and reduces the total emission of pollutants. Power power lithium batteries usually have a small capacity and can supply instantaneous high-current power supply to power equipment. It is used in power tools and hybrid vehicles to absorb the brake feedback energy and provide instantaneous additional energy for the vehicle's start and acceleration.

In general, the total energy stored by a lithium-ion battery is inversely proportional to its safety. As the capacity of the battery increases, the size of the battery also increases, and its heat dissipation performance becomes worse and worse, so the possibility of accidents will also greatly increase. Regarding mobile phone lithium-ion batteries, the basic requirement is that the probability of safety accidents is less than 1/106, which is also the minimum standard acceptable to the public. However, the safety of large-capacity lithium-ion batteries, especially high-power lithium-ion batteries for automobiles, has been the focus of research. However, with the in-depth research and application of large-capacity lithium-ion batteries, the safety problems of overcharging and short circuit have become increasingly prominent, and have become technical problems that must be overcome for the large-scale application of power lithium-ion batteries. The working conditions of power lithium batteries are harsh. Important safety issues are explosions, burning, battery leaks, and electrical fires caused by battery packs. There are many reasons for battery safety problems, mainly focusing on the safety hazards of overcharging the battery, short circuits inside and outside, and the safety hazards of the battery moving back during the use of the battery pack.

Safety is one of the important obstacles to the practical application of large-capacity lithium-ion batteries.

With the development of lithium-ion batteries and the development of raw materials, the safety of lithium-ion batteries has also made breakthroughs. At present, 10-100ah power lithium-ion batteries and battery packs have passed the industry safety testing standards. The important factors that affect the safety of lithium-ion batteries are electrode materials, electrolytes, manufacturing processes, and usage conditions. With the progress of material science and production technology, electrode materials with high stability performance, choose to include flame retardants or overload protection electrolyte additives, and battery protection circuits to design a well-designed heat dissipation structure and management system to improve the safety of lithium-ion batteries, so large-capacity power lithium-ion batteries to solve the safety problems.

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geb-battery · 5 months

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Why is lithium battery recycling an urgent problem to be solved?

Since the birth of lithium-ion batteries, their excellent performance has quickly established pace in the battery market and has been applied in various industries. In 2000, it began to be popular in mobile phone products, and gradually occupied the 3C consumer electronics market. Lithium-ion batteries are widely used, but few people are aware of recycling. After use, most of them are disposed of as regular garbage. This has caused significant pollution.

Most of the cathode materials of lithium-ion batteries are metal oxides embedded in lithium transitions, among which LiCoO2 is the most widely used, which is also the earliest commercial cathode material for lithium-ion secondary batteries. In addition, in-depth research on lithium-ion battery anode materials, humans mix small amounts of nickel LiCoO2 and use their mixed oxides (currently licoxni1-xo20, the most commonly used lithium-ion battery cathode material with LiCoO2 contains lithium cobalt oxide, lithium method, organic carbonate carbon materials, copper, aluminum and other chemicals. This is because batteries contain a lot of metals, and cobalt is a rare element, but it is found in quite high amounts in lithium-ion batteries. Therefore, the national recycling policy for lithium-ion batteries is important to consider the recycling of metals such as cobalt.

The most important thing for recovery is the application of acid leaching and solvent extraction phase wet gold technology, followed by the use of electrochemical technology to deposition metal in the leaching solution and direct repair of failed electrode materials. Metallurgical technology is an important technology for metal recycling of lithium-ion batteries. Therefore, with the development of metallurgical technology, microbial metallurgy technology is the most mature. So far, this technology has not been used to recycle lithium-ion batteries. With the continuous improvement of environmental requirements, this technology is bound to be widely used in lithium-ion battery recycling.

In the future, the recycling of lithium-ion batteries will require the proper disposal of materials that have an adverse impact on the environment, in addition to recovering useful resources. At the same time, according to the development of lithium-ion batteries and the requirements of the future environment, the processing of lithium-ion batteries in the future will develop in the direction of integration and diversification.

#battery #batteries #electricvehicles

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geb-battery · 5 months

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What are the most potential new lithium battery materials in the future?

1. Silicon-carbon composite anode material

After the large screen and diversified functions of digital terminal products, new requirements are put forward for the battery life. At present, the gram capacity of lithium battery materials is low, which cannot meet the increasing demand for batteries in terminals.

As a kind of anode material in the future, the theoretical gram capacity of silicon-carbon composite materials is about 4200mAh/g, which is more than 372 times higher than the 10mAh/g of graphite anode.

At present, the important problems of silicon-carbon composites are:

During charging and discharging, the volume expansion can reach 300%, which will lead to the pulverization of silicon material particles, resulting in the loss of material capacity. At the same time, the ability to absorb liquid is poor.

Poor cycle life. At present, the above problems are solved by means of silicon powder nano, silicon carbon coating, doping, etc., and some companies have made some progress.

2. Lithium titanate

In recent years, the domestic enthusiasm for the research and development of lithium titanate is high.

The advantages of lithium titanate are:

It has a long cycle life (up to more than 10000,1 times), is a zero-strain material (volume change is less than <>%), and does not generate SEI films in the traditional sense;

High level of security. Its lithium insertion potential is high, no dendrite is formed, and the thermal stability is extremely high when charging and discharging;

Fast charging possible.

At present, the important factor limiting the use of lithium titanate is that the price is too high, higher than that of traditional graphite, and the gram capacity of lithium titanate is very low, about 170mAh/g. Only by improving the production process and reducing the production cost can the advantages of lithium titanate such as long cycle life and fast charging be put into use. Combined with the market and technology, lithium titanate is more suitable for use in buses and energy storage fields that have no space requirements.

3. Graphene

Since graphene won the Nobel Prize in 2010, it has attracted wide attention from all over the world, especially in China. There has been a boom in graphene research and development in China, which has many excellent properties, such as good light transmittance, excellent electrical conductivity, high thermal conductivity and high mechanical strength.

Potential applications of graphene in lithium-ion batteries are:

as anode material. The gram capacity of graphene is high, and the reversible capacity is about 700mAh/g, which is higher than the capacity of graphite anode. In addition, the good thermal conductivity of graphene ensures its stability in the battery system, and the spacing between graphene sheets is greater than that of graphite, so that lithium ions diffuse smoothly between graphene sheets, which is conducive to improving the power performance of batteries. Due to the immature production process and unstable structure of graphene, there are still some problems in graphene as an anode material, such as low first discharge efficiency, about 65%; Poor cycling performance; The price is higher, which is significantly higher than that of traditional graphite anode.

As a positive and negative electrode additive, it can improve the stability of lithium-ion batteries, extend the cycle life, and add new internal conductivity.

In view of the immaturity, high price and unstable performance of graphene in the current mass production process, graphene will be the first to be used as a positive and negative electrode additive in lithium-ion batteries.

4. Carbon nanotubes

Carbon nanotubes are a kind of carbon material with graphitized structure, which has excellent conductivity, and because of its small depth and short stroke when de-intercalation, it can be used as an anode material for less polarization during large-rate charging and discharging, which can improve the large-rate charge-discharge performance of the battery.

Shortcoming:

When carbon nanotubes are directly used as anode materials for lithium-ion batteries, there are problems such as high irreversible capacity, voltage lag and inconspicuous discharge platform. For example, Ng et al. prepared single-walled carbon nanotubes by simple filtration, and directly used them as anode materials, with a first discharge capacity of 1700mAh/g and a reversible capacity of only 400mAh/g.

Another application of carbon nanotubes in the anode is to combine with other anode materials (graphite, lithium titanate, tin-based, silicon-based, etc.) to improve the electrical properties of other anode materials by using their unique hollow structure, high conductivity and large specific surface area as a carrier.

5. Lithium-rich manganese-based cathode materials

High capacity is one of the development directions of lithium-ion batteries, but the energy density of lithium iron phosphate and lithium nickel-cobalt-manganese oxide is 580Wh/kg and 750Wh/kg in the current cathode materials, both of which are low. The theoretical energy density of lithium-rich manganese base can reach 900Wh/kg, which has become a hot spot for research and development.

The advantages of lithium-rich as a cathode material are:

High energy density and abundant important raw materials

Due to the short development time, there are a number of problems with the lithium-rich manganese base:

The first discharge efficiency is very low, and the material is oxygen in the cycle process, which brings potential safety hazards, poor cycle life, and low rate performance.

At present, the means to solve these problems include coating, acid treatment, doping, pre-cycling, heat treatment, etc. Although lithium-rich manganese base has obvious gram capacity advantages and huge potential, it is limited to slow technological progress, and it will take time for it to be marketed in large quantities.

6. Power nickel-cobalt-lithium manganese oxide material

For a long time, there has been a great controversy about the route of power lithium batteries, so lithium iron phosphate, lithium manganese oxide, ternary materials and other routes have been adopted. The domestic power lithium battery route is dominated by lithium iron phosphate, but with Tesla's popularity around the world, the ternary material route it uses has caused a boom.

Although lithium iron phosphate is safe, its low energy density can not be overcome, and new energy vehicles require longer mileage, so in the long run, materials with higher gram capacity will replace lithium iron phosphate as the next generation of mainstream technology routes.

Lithium nickel-cobalt-manganese oxide ternary materials are most likely to become the mainstream materials for the next generation of power lithium batteries in China. Domestic electric vehicles with ternary routes, such as BAIC E150EV, JAC IEV4, Chery EQ, Weilan, etc., have a great increase in unit weight density compared with lithium-ion iron phosphate batteries.

7. Coat the diaphragm

Separators are critical to the safety of lithium-ion batteries, requiring good electrochemical and thermal stability, as well as high wettability to the electrolyte during repeated charge and discharge.

Coated diaphragm refers to the coating of adhesives such as PVDF or ceramic alumina on the base film. The uses of coated diaphragms are:

1. Improve the heat shrinkage resistance of the diaphragm and prevent the diaphragm from shrinking and causing a large area of short circuit;

2. The thermal conductivity of the coating material is low, which prevents some thermal runaway points in the battery from expanding to form an overall thermal runaway.

8. Ceramic alumina

In the coated separator, the ceramic coated separator is mainly aimed at the power lithium battery system, so its market growth space is larger than that of the glued separator, and the market demand for its core material ceramic alumina will be greatly increased with the rise of ternary power lithium battery.

The purity, particle size and morphology of ceramic alumina used to coat the separator have high requirements, and the products of Japan and South Korea are more mature, but the price is more than twice as expensive as the domestic ones. At present, there are also many companies in China that are developing ceramic alumina, hoping to reduce dependence on imports.

9. High-voltage electrolyte

Increasing the energy density of batteries is one of the trends of lithium-ion batteries, and there are currently two important ways to increase energy density:

One is to increase the charging cut-off voltage of traditional cathode materials, such as increasing the charging voltage of lithium cobalt oxide to 4.35V and 4.4V. However, the method of increasing the charging cut-off voltage is limited, and further increasing the voltage will lead to the collapse of the lithium cobalt oxide structure, which is unstable in nature.

The other is to develop new cathode materials with higher charging and discharging platforms, such as lithium-rich manganese-based, lithium nickel-cobalt oxide, etc.

After the voltage of the cathode material increases, the high-voltage electrolyte to be matched with it, additives play a key role in the high-voltage performance of the electrolyte, which has become the focus of research and development in recent years.

10. Water-based binder

At present, cathode materials mainly use PVDF as a binder, which is dissolved with organic solvents. Organic solvents are also used in the binder system of the negative electrode, such as SBR, CMC, and fluoroolefin polymers. In the process of electrode production, the organic solvent should be dried and volatilized, which not only pollutes the environment, but also endangers the health of employees. The dried and evaporated solvents need to be collected and processed in special freezing equipment, and fluoropolymers and their solvents are expensive, adding to the production cost of lithium-ion batteries.

#lithiumbatteries #battery #energystoragebattery

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geb-battery · 5 months

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What are the most potential new lithium battery materials in the future?

1. Silicon-carbon composite anode material

At present, the important problems of silicon-carbon composites are:

Poor cycle life. At present, the above problems are solved by means of silicon powder nano, silicon carbon coating, doping, etc., and some companies have made some progress.

2. Lithium titanate

In recent years, the domestic enthusiasm for the research and development of lithium titanate is high.

The advantages of lithium titanate are:

It has a long cycle life (up to more than 10000,1 times), is a zero-strain material (volume change is less than <>%), and does not generate SEI films in the traditional sense;

High level of security. Its lithium insertion potential is high, no dendrite is formed, and the thermal stability is extremely high when charging and discharging;

Fast charging possible.

3. Graphene

Potential applications of graphene in lithium-ion batteries are:

As a positive and negative electrode additive, it can improve the stability of lithium-ion batteries, extend the cycle life, and add new internal conductivity.

4. Carbon nanotubes

Shortcoming:

5. Lithium-rich manganese-based cathode materials

The advantages of lithium-rich as a cathode material are:

High energy density and abundant important raw materials

Due to the short development time, there are a number of problems with the lithium-rich manganese base:

The first discharge efficiency is very low, and the material is oxygen in the cycle process, which brings potential safety hazards, poor cycle life, and low rate performance.

6. Power nickel-cobalt-lithium manganese oxide material

7. Coat the diaphragm

Coated diaphragm refers to the coating of adhesives such as PVDF or ceramic alumina on the base film. The uses of coated diaphragms are:

1. Improve the heat shrinkage resistance of the diaphragm and prevent the diaphragm from shrinking and causing a large area of short circuit;

2. The thermal conductivity of the coating material is low, which prevents some thermal runaway points in the battery from expanding to form an overall thermal runaway.

8. Ceramic alumina

9. High-voltage electrolyte

Increasing the energy density of batteries is one of the trends of lithium-ion batteries, and there are currently two important ways to increase energy density:

The other is to develop new cathode materials with higher charging and discharging platforms, such as lithium-rich manganese-based, lithium nickel-cobalt oxide, etc.

10. Water-based binder

#lithiumbatteries #battery 18650 batteries batterypack #batteries

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geb-battery · 5 months

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Power Your Ride with Electric Bike Batteries

Electric bicycles, or e-bikes, have become a popular mode of transportation for their eco-friendly nature and convenience. At the heart of these innovative vehicles lies the electric bike battery, providing the power needed to turn every ride into a thrilling and effortless experience. In this article, we will explore the key features and advantages of electric bike batteries, highlighting how they are revolutionizing the way we commute and explore the world.

Long-Lasting Performance: One of the most crucial aspects of an electric bike battery is its longevity. High-quality batteries are designed to provide consistent performance for extended periods, allowing riders to enjoy longer journeys without worrying about running out of power. With advancements in battery technology, e-bike batteries are now more durable and have longer life cycles than ever before. This means fewer replacements and more uninterrupted rides, making electric bikes a reliable and cost-effective transportation option.

Fast Charging: Time is of the essence, and electric bike batteries are equipped with fast-charging capabilities to ensure minimal downtime. With rapid charging times, riders can quickly replenish their batteries during breaks, allowing them to get back on the road or trail in no time. Whether you're a daily commuter or an adventurous explorer, fast-charging electric bike batteries enable you to make the most of your time and keep your adventures going.

Range and Power: The range of an electric bike battery refers to the distance it can cover on a single charge. As technology advances, e-bike batteries are now capable of providing longer ranges, allowing riders to go further and explore more diverse terrains. With the ability to cover greater distances, riders can confidently embark on longer trips, commute to work without worrying about recharging, and tackle challenging inclines effortlessly. Electric bike batteries also offer adjustable power settings, allowing riders to conserve energy when needed or unleash maximum power for exhilarating rides.

Smart Battery Management Systems: To ensure optimal performance and safety, electric bike batteries are equipped with advanced battery management systems (BMS). These intelligent systems monitor and regulate the battery's charging and discharging processes, preventing overcharging, overheating, and over-discharging. BMS also provides real-time information about the battery's status, such as remaining charge and estimated range, allowing riders to plan their rides accordingly. With smart BMS, riders can have peace of mind, knowing that their electric bike battery is constantly protected and optimized for performance.

Eco-Friendly and Sustainable: Electric bike batteries play a crucial role in reducing our carbon footprint and promoting sustainable transportation. By choosing an electric bike over a traditional vehicle, riders contribute to a cleaner and greener environment. Electric bikes produce zero emissions and consume less energy compared to cars, making them an eco-friendly alternative for daily commuting and short-distance travel. With advancements in battery technology, e-bike batteries are becoming more energy-efficient, further enhancing their sustainability credentials.

Conclusion: Electric bike batteries have revolutionized the way we commute and explore, offering an eco-friendly, efficient, and thrilling mode of transportation. With long-lasting performance, fast-charging capabilities, extended ranges, smart battery management systems, and sustainability benefits, electric bike batteries are powering the future of urban mobility and outdoor adventures. Embrace the power of electric bike batteries and embark on unforgettable rides while making a positive impact on the environment.

#lithiumbatteries #ebikebattery #e-bikebattery

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geb-battery · 5 months

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Demystifying Electric Bike Batteries: A Comprehensive Guide

In the realm of electric bicycles, the unsung hero powering these eco-friendly rides is the electric bike battery. As technology continues to evolve, understanding the intricacies of these power sources becomes crucial for enthusiasts and newcomers alike. In this comprehensive guide, we will unravel the mysteries of electric bike batteries, exploring their components, functionalities, and the role they play in revolutionizing the world of cycling.

The Anatomy of Electric Bike Batteries: Electric bike batteries are sophisticated energy storage systems composed of several key components. At their core is the lithium-ion (Li-ion) battery, known for its high energy density, lightweight structure, and reliability. The battery pack includes individual cells, a Battery Management System (BMS), and a casing for protection. Understanding the synergy between these elements is essential for grasping how electric bike batteries function.

Lithium-ion Technology: The adoption of lithium-ion technology has been a game-changer in the world of electric bike batteries. Li-ion batteries offer a favorable combination of high energy density, low self-discharge rates, and a longer cycle life compared to traditional battery chemistries. This technology not only enhances the performance of electric bikes but also contributes to their overall efficiency and longevity.

Voltage, Capacity, and Range: Electric bike batteries come in various voltage and capacity configurations, influencing the overall performance and range of the e-bike. Voltage determines the power output, while capacity, measured in ampere-hours (Ah) or watt-hours (Wh), indicates how much energy the battery can store. Higher voltage and capacity often result in a longer range per charge, allowing riders to explore greater distances without the need for frequent recharging.

Charging and Discharging Processes: Understanding the charging and discharging processes is key to maximizing the lifespan of electric bike batteries. Charging should be done using a compatible charger and avoiding extreme temperature conditions. The BMS plays a crucial role in regulating these processes, preventing overcharging and over-discharging, thus ensuring the battery's safety and longevity.

Battery Management System (BMS): The BMS serves as the brain of the electric bike battery, monitoring and managing various aspects of its performance. This intelligent system safeguards against issues such as overvoltage, undervoltage, overheating, and short circuits. Additionally, the BMS provides real-time information on the battery's status, allowing riders to make informed decisions about their journeys.

Environmental Impact and Sustainability: Electric bike batteries contribute to sustainable transportation by reducing carbon emissions and promoting energy efficiency. The materials used in manufacturing, such as lithium, cobalt, and nickel, raise questions about environmental impact. As technology progresses, efforts are underway to develop more eco-friendly battery chemistries and recycling initiatives to minimize the environmental footprint of electric bike batteries.

Conclusion: Electric bike batteries are the driving force behind the surge in popularity of electric bicycles. As we demystify their components, technologies, and functionalities, it becomes evident that these power sources are not only propelling us forward on two wheels but also shaping a greener and more sustainable future. Embrace the knowledge of electric bike batteries, and join the movement towards a cleaner, more efficient mode of transportation.

#ebikebattery #battery 18650 batteries batterypack

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geb-battery · 5 months

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Revolutionize Your Ride with GEB Battery's Dynamic Electric Bike Batteries

Introduction: Step into a new era of cycling with GEB Battery's state-of-the-art electric bike batteries. As a leader in sustainable energy solutions, GEB Battery proudly presents the Dynamic Electric Bicycle Batteries, a game-changing power source that promises to redefine your riding experience. Join us on a journey to discover the unparalleled features of these batteries and why they are the key to unlocking a world of limitless possibilities.

Unmatched Power and Efficiency: GEB Battery's Dynamic Electric Bicycle Batteries are engineered for unparalleled power and efficiency. With cutting-edge lithium-ion technology, these batteries deliver a high energy density, ensuring a robust and reliable performance for your electric bike. Experience the thrill of accelerated rides, rapid acceleration, and sustained power throughout your journey, setting new standards for electric biking excellence.

Discover the innovation behind GEB Battery's Dynamic Electric Bicycle Batteries at GEB Battery's Product Page and witness the evolution of electric bike power.

Sleek Design, Lightweight Build: Redefining aesthetics in the world of electric bike batteries, the Dynamic series boasts a sleek and lightweight design. The compact form factor enhances the overall agility of your electric bike without compromising on power. GEB Battery's commitment to innovation is evident in the seamless integration of cutting-edge technology with a design that complements the modern cyclist's lifestyle.

Extended Range for Boundless Exploration: Break free from limitations with the extended range offered by GEB Battery's Dynamic Electric Bicycle Batteries. Designed to cover more ground on a single charge, these batteries empower riders to explore diverse landscapes, from urban streets to rugged terrains. Elevate your adventures and go the extra mile with confidence, knowing that your battery is equipped for the journey ahead.

Intelligent Battery Management for Peace of Mind: Safety takes precedence with GEB Battery's intelligent Battery Management System (BMS). The BMS oversees the charging and discharging processes, providing protection against overcharging, overheating, and other potential issues. Real-time monitoring ensures that you are always informed about your battery's status, allowing you to focus on the joy of the ride without worrying about safety concerns.

Experience the Future of Electric Biking: GEB Battery invites you to experience the future of electric biking with the Dynamic Electric Bicycle Batteries. Elevate your ride, embrace sustainability, and enjoy the freedom to explore without constraints. Visit GEB Battery's Product Page to delve into the features that make these batteries a revolutionary choice for riders seeking a dynamic and thrilling cycling experience.

Conclusion: GEB Battery's Dynamic Electric Bicycle Batteries are not just power sources; they are catalysts for a new era in electric biking. With unmatched power, sleek design, extended range, and intelligent battery management, these batteries redefine what's possible on two wheels. Don't miss out on the electric biking revolution – visit GEB Battery's Product Page and transform your ride into an exhilarating journey towards a sustainable and exciting future.

#lithiumbatteries #ebikebattery

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geb-battery · 1 year

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GEB LiFePO4 Prismatic Cell

To achieve high safety with our batteries, we use only the highest quality cells of the safest technology available today,we can guarantee the safety and reliability of our batteries.lithium iron phosphate batteries (LiFePO4) don't require active maintenance to extend their service life. Also, the batteries show no memory effects and due to low self-discharge (<3.5% per month), you can store them for a longer period of time.lithium iron phosphate batteries (LiFePO4) have 100% of their capacity available

#geb #energystoragebattery #lithiumbatteries

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geb-battery · 1 year

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What should be paid attention to in 18650 assembly

1. The batteries are neatly arranged, which is convenient for maintenance in the future. Best to use a standard 18650 battery card tray

2. Good welding, the most common welding method on the market is spot welding with nickel welding machine. You can also use a soldering iron, the solder joints are in good contact

3. After welding, the lines of each group of batteries must be clear

4. Do a good job of waterproofing and insulation. It is best to cut a piece of highland barley paper or use asbestos material

5. The most important point is that the internal resistance of the battery before welding, and the current voltage error should not exceed 0.05V! If possible, a special protection board for lithium batteries must be added to prevent overcharging and overdischarging

6. After welding, measure whether the voltage of each circuit is good

7. After the newly assembled battery pack has been used for a period of time, it is necessary to check the voltage of the battery in groups

Application fields:

Mobile digital, beauty salon, medical equipment, energy storage power station, low-speed electric vehicle, intelligent robot

Smart grid, instrumentation, military equipment, communication base station, agricultural tools, security monitoring equipment

#battery 18650 batteries batterypack

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geb-battery · 1 year

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Is a ternary lithium battery or a lithium iron phosphate battery better for energy storage?

Many people have a question when considering purchasing energy storage products, which energy storage product is better (longer life)? However, this is often determined by the battery inside. Generally, it is a ternary lithium battery and a lithium iron phosphate battery. So which one is better and what is the difference?

Lithium iron phosphate battery (LiFePO4) refers to a lithium ion battery with lithium iron phosphate as the positive electrode material. The cathode materials of lithium-ion batteries mainly include lithium cobalt oxide, lithium manganate, lithium nickelate, ternary materials, lithium iron phosphate, etc., of which lithium cobalt oxide is the cathode material used in most lithium-ion batteries.

Ternary polymer lithium battery refers to a lithium battery whose positive electrode material is lithium nickel cobalt manganese oxide (Li(NiCoMn)O2) or nickel cobalt aluminate ternary positive electrode material. The ternary composite cathode material uses nickel salt, cobalt salt and manganese salt as raw materials, and the ratio of nickel, cobalt and manganese can be adjusted according to actual needs. The battery with the ternary material as the positive electrode is safer than the lithium cobalt oxide battery, but the voltage is too low, so when it is used in the mobile phone (the cut-off voltage of the mobile phone is generally around 3.0V), there will be an obvious feeling of insufficient capacity.

The energy density of ternary lithium batteries will be higher than that of lithium iron phosphate batteries. If it is the same power, the volume of the ternary lithium battery will be about twice smaller than that of the lithium iron phosphate battery. Most ternary lithium batteries are also used as 18650 batteries, which are also commonly used by Tesla, and lithium iron phosphate batteries are often used on buses. Tesla can go further with a ternary battery because of its light weight and long range. Another reason why buses do not use ternary lithium batteries is for safety reasons. Lithium iron phosphate batteries do not burn in the event of a short circuit. In actual use, the lithium iron phosphate battery has high temperature resistance and strong safety and stability. Cheaper and better cycle performance.

Both of these batteries can be used for energy storage, but it depends on which point you value, but if you want to use it at home, for safety, because charging indoors is more dangerous, it is easy to short circuit and cause fire, it is recommended to choose lithium iron phosphate battery. If it is only used outdoors, it is no problem to choose a ternary battery.

#homepower solarbattery generator solarprojects solarpanels solartrends gosolar energynews solar solarpower solarenergy solarnews solarblog g

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geb-battery · 2 years

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What are the common faults of lithium batteries

Problems in the production process of lithium-ion batteries:

1. Internal resistance of battery

If the positive and negative plates of the battery are improperly welded or the internal resistance of the rivets in contact with the pressure plate is too large, the internal resistance of the lithium-ion battery will be affected. If the pores of the separator are too small, the internal resistance of the battery will also be affected.

2. Battery voltage

In the production process of lithium-ion batteries, the positive electrode will be mixed with impurities, and the crystallization of the negative electrode will reduce the voltage of the lithium-ion battery. The incomplete formation of the SEI film during the formation process can also make the voltage of the Li-ion battery too low.

Problems during the use of lithium-ion batteries:

1. Unable to charge and discharge

Lithium-ion batteries cannot be charged while being charged, and cannot be discharged normally when in use. There may be the following reasons.

The failure of the protection plate protection or the failure of the protection plate and the external short circuit between the lithium-ion battery and the appliance may cause the lithium-ion battery to not charge effectively.

The voltage of the lithium-ion battery is lower than the protection voltage of the protection board or the controller, and the damage of the protection board or the controller will make the lithium-ion battery unable to discharge normally during use. The same result occurs when the line is disconnected.

2. Abnormal temperature

If the lithium-ion battery has abnormal temperature during charging or discharging, such as excessive temperature, there may be a slight short circuit inside the lithium-ion battery.

3. Suddenly stop working

When the lithium-ion battery suddenly stops working during use, it is very likely that the lithium-ion battery has been discharged. When the minimum voltage of the protection board or the controller is reached, the self-protection function of the lithium-ion battery is turned on, resulting in a power outage. .

If the excessive working current for a long time exceeds the designed protection current of the protection board or the continuous current of the controller, the protection board or the controller will stop working, causing the lithium-ion battery to suddenly stop working.

#homepower solarbattery generator solarprojects solarpanels solartrends gosolar energynews solar solarpower solarenergy solarnews solarblog g

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geb-battery · 2 years

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How to keep up with long-term storage of lithium batteries

Compared with nickel-cadmium batteries and nickel-metal hydride batteries, lithium batteries have many advantages such as high volume energy ratio, small size, light weight, high working voltage, no memory effect (can be charged and taken out at any time), and environmental protection. Protected and pollution-free. , is the most advanced battery, the disadvantage is expensive. Therefore, in order to give full play to the energy efficiency of lithium batteries, in the process of daily use and storage, attention should be paid to the maintenance of lithium batteries and the knowledge of how to store lithium batteries for a long time.

Daily maintenance of lithium batteries:

1. The newly bought lithium battery will have a little power. Therefore, users can use the battery directly after getting it, and recharge it after the remaining power is used up. In this way, after 2 to 3 times of normal use, the activity of the lithium battery can be fully activated. .Here is a special reminder: don't be fooled by the salesperson or rumors on the Internet, the new lithium battery needs to be activated for up to 12 hours when it is used for the first time.

2. The lithium battery has no memory effect and can be charged at any time, but it should be noted that the lithium battery cannot be over-discharged, which will cause irreversible capacity loss. When the machine alerts that the battery is low, it starts charging immediately.

3. In daily use, the newly charged lithium battery should be put aside for half an hour and used after the charging performance is stable, otherwise it will affect the battery performance.

4. When the instrument is not in use, be sure to remove the battery and store it in a dry and cool place.

5. Pay attention to the use environment of lithium batteries: the charging temperature of lithium batteries is 0°C to 45°C, and the discharge temperature of lithium batteries is -20°C to 60°C.

6. Do not mix the battery with metal objects, so as to avoid metal objects contacting the positive and negative poles of the battery, resulting in short circuit, damage to the battery and even danger.

7. Do not knock, puncture, step on, modify or expose the battery to sunlight, and do not place the battery in a microwave oven or high voltage environment.

8. Use the regular matching lithium battery charger to charge the battery, do not use inferior or other types of chargers to charge the lithium battery.

#energystoragebatteries Electricbicycle largebatterypack

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geb-battery · 2 years

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What are the reasons that affect the price of lithium batteries?

1. Cells

The battery cell is the basis of the lithium-ion battery, and its price directly determines the price of the lithium-ion battery. The safety factor, working temperature, cycle times, etc. of the cells of different material systems are different, and the prices are also different. The battery material system includes potassium manganate, lithium cobaltate, lithium titanate, lithium iron carbonate, etc.

2. Lithium-ion battery protection board

The characteristics of the lithium-ion battery itself determine that it must be used with a battery protection board or a battery management system, otherwise there is a high risk of explosion, damage or shortened life. The quality and price of the battery protection board also has an important impact on the price of lithium-ion batteries.

3. Shell

Lithium-ion battery shells can be divided into three materials: metal, plastic and PVC heat sealing. The shell prices of different materials are also different, which affects the final selling price of lithium-ion batteries. Metal housings can be subdivided into many different metal materials. If it is a special metal material or has a waterproof level requirement, the price will be higher. Plastic shells have different requirements for materials, processes, and three defenses, and their prices are also different. PVC heat sealing is suitable for the case where the number of series cells is small and the overall weight is relatively light.

4. Excipients and process

The accessories and manufacturing process of a lithium-ion battery also affect its price. Common accessories include conventional nickel sheets, jumper sheets, copper-nickel composite sheets, formed nickel sheets, special plugs and other connectors. The cost of accessories varies and will also affect the final pricing of lithium-ion batteries. The assembly process of the lithium-ion battery also affects the price. The higher the craftsmanship, the higher the price.

#lithiumbatteries #supplier #highquality

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geb-battery · 2 years

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3 major application areas of energy storage batteries

With the proposal of green and low-carbon life, more and more people have joined this action. As far as energy storage batteries are concerned, it is a very good choice. So, in which fields is energy storage more widely used?

Three energy storage fields - power system, automobile and household In the field of electric vehicles, the energy storage technologies with application prospects are mainly lithium-ion batteries, and lead-acid batteries also have a certain market. The electric vehicle sector requires 453 million kilowatts of energy storage. The scale of the global electric vehicle market is showing a rapid development trend. According to the prediction of True Lithium Research, in the future, with the continuous breakthrough of new energy vehicle battery life technology and the gradual reduction of the cost of core components, new energy vehicles are expected to achieve scale in the global passenger car. The car market around 2017. By then, the global electric vehicle market size will also usher in a new round of explosive growth. The field of home energy storage can also be understood as a group of large batteries that store electrical energy for the home.

For families in most countries, this is still a relatively unfamiliar home appliance. Currently, the major global markets for home energy storage systems are in the United States and Japan. The living area of Americans is usually relatively large, the households use more electricity, and there are more households with new energy power generation systems such as wind energy and solar energy. Due to the large amount of electricity consumption and the large price difference between peak and valley electricity prices, American households usually use energy storage systems to store electricity during low electricity price periods and use them during high electricity price periods to achieve the purpose of saving electricity bills. In addition, in remote areas and areas with high incidence of natural disasters such as earthquakes and hurricanes, household energy storage systems are used as emergency power sources to avoid the inconvenience caused by frequent power outages due to disasters or other reasons.

#energystoragebattery #global trends #Waterproofenergystoragebattery #energysaving

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