-
06
2025-05
What are the main structural components of lithium-ion batteries?
Lithium ion batteries are an important energy storage device widely used in fields such as mobile electronic devices and electric vehicles. This article will provide a detailed introduction to the main structural components of lithium-ion batteries, including positive electrode materials, negative electrode materials, electrolytes, separators, and current collectors. Meanwhile, the influence of different materials on the performance of lithium-ion batteries will also be explored. Through a deep understanding of the structure of lithium-ion batteries, theoretical foundations can be provided for battery design and optimization.1. IntroductionLithium ion battery is a type of battery that converts electrical energy through the migration of lithium ions between the positive and negative electrodes. It has the advantages of high energy density, low self discharge rate, and long cycle life, and is therefore widely used in various electronic devices and transportation vehicles. The performance of lithium-ion batteries mainly depends on their structural composition, so a deep understanding of the structural composition of lithium-ion batteries is of great significance for battery design and optimization.2、 Positive electrode materialThe positive electrode material is an important component of lithium-ion batteries, whose main function is to store and release lithium ions. Common positive electrode materials include lithium manganese oxide, lithium cobalt oxide, ternary materials, etc. Lithium manganese oxide has a high specific capacity and low cost, but a short cycle life; Lithium cobalt oxide has a high specific capacity and good cycle life, but the cost is relatively high; Ternary materials have high specific capacity and good cycle life, but they are expensive. Therefore, in practical applications, it is necessary to select suitable positive electrode materials according to specific needs.3、 Negative electrode materialNegative electrode material is another important component in lithium-ion batteries, whose main function is to store and release lithium ions. Common negative electrode materials include graphite, silicon, etc. Graphite has a high specific capacity and good cycle life, but its capacity is limited; Silicon has a high specific capacity, but the capacity decays rapidly. Therefore, in practical applications, a balance needs to be struck between graphite and silicon to meet the needs of different application scenarios.4、 ElectrolyteThe main function of electrolyte is to provide a transport medium for lithium ions. Common electrolytes include organic electrolytes and solid electrolytes. Organic electrolytes have high conductivity and good lithium ion transport performance, but there are safety hazards such as combustion and volatilization; Solid electrolyte has good safety performance, but low conductivity. Therefore, in practical applications, it is necessary to choose the appropriate electrolyte based on safety and performance requirements.5、 DiaphragmThe main function of the diaphragm is to prevent short circuits between the positive and negative electrodes. Common membranes include polyolefin membranes, ceramic membranes, etc. Polyolefin film has good electrical conductivity and isolation performance, but poor thermal stability; Ceramic membranes have good thermal stability and isolation performance, but low electrical conductivity. Therefore, in practical applications, it is necessary to choose a suitable separator based on the safety and performance requirements of the battery6、 Collector fluidThe main function of a current collector is to collect and distribute electrical current. Common current collectors include copper foil, aluminum foil, etc. Copper foil has good conductivity and mechanical strength, but it is relatively expensive; Aluminum foil has a lower price, but its conductivity is poor. Therefore, in practical applications, it is necessary to choose a suitable current collector based on cost and performance requirements.7. ConclusionThe main structural components of lithium-ion batteries include positive electrode material, negative electrode material, electrolyte, separator and current collector, sealing ring, positive electrode cap, battery case, etc. The selection of different materials has a significant impact on the performance of lithium-ion batteries. By delving into the structural composition of lithium-ion batteries, a theoretical foundation can be provided for battery design and optimization. In the future, with the advancement of technology, the structural composition of lithium-ion batteries may change to meet higher performance and safer requirements.
-
16
2025-04
The difference between power batteries and energy storage batteries
Both are lithium batteries, why are they divided into energy storage batteries and power batteries? I think many people have this question? Here we will introduce the differences between them. Although energy storage batteries and power batteries are typically based on lithium-ion technology (such as lithium iron phosphate or ternary lithium), they have significant differences in design, performance, and lifespan due to their vastly different application scenarios and requirements. Simply put, it can be understood using a metaphor:Power battery - like sprinters: pursuing explosive power, speed, and agility (high power, high energy density). For example, many electric vehicle batteries nowadays can be charged quickly, with slow charging taking 8 hours and fast charging taking only 30 minutes to fully charge. Energy storage batteries - like marathon runners: pursuing endurance, stability, and cost-effectiveness (long lifespan, high safety, low cost). Below, we will make a detailed comparison from several dimensions. Please refer to the table below:Although there are many differences between power batteries and energy storage batteries, the core principle of the battery cell is the same, consisting of a positive electrode, a negative electrode, a separator, and an electrolyte. But there will be significant differences in design and material selection. For example, if a power battery requires high rate charging and discharging, it needs to choose a positive electrode material with better conductivity, and the D50 of the material should be as small as possible. At the same time, conductive agents such as CNT should be added to the formula to improve performance. In addition, in order to pursue high magnification, the compaction density and surface density cannot be made too high. Our current energy storage cells are mostly based on 280Ah and 314AH, and are mostly stacked. And power batteries come in both wound (cylindrical and square) and laminated (square) forms.Due to the characteristics of different projects and lithium batteries, battery manufacturers need to make corresponding adjustments based on customer needs.Be Power specializes in providing lithium-ion batteries for various applications and customized solutions for customers. Welcome to our official website for more information: www.bepower.com.cn
-
16
2026-01
How important is cell consistency for battery modules!
Due to the differences in voltage, capacity, charge capacity, internal resistance, discharge plateau, and constant current ratio among the individual cells, the charging and discharging rates of the battery module composed of individual cells cannot be synchronized and consistent during charging and discharging, which will shorten the service life of the entire battery module.Therefore, separate capacity treatment must be carried out to make the single battery of the same module have the same voltage; Consistent cycle life; Consistent capacity; Consistent self discharge; Consistent electrical charge; Consistent internal resistance; Consistent discharge platform; Consistent constant current ratio.Consistent voltage:① Inconsistent voltage in series circuits can cause overcharging and overdischarging, and the manager cannot control the battery system; ② The parallel circuit voltage is not consistent, and the batteries are charged and discharged evenly between each other until the voltage is consistent. But if the pressure difference between them is too large, the fuse (PCB board structure) will be blown, and the fuse is allowed to have a pressure difference of less than 0.6V;③ If there is a large pressure difference between the series modules, it can only be resolved through active balancing by BMS. In severe cases, manual charging and discharging or removal of faulty batteries by after-sales service is required.2. Consistent capacity:Inconsistent capacity is the main cause of voltage inconsistency, and there is a risk of overcharging and overdischarging during the charging and discharging process.3. Consistent electrical charge:Even if the battery capacity is the same, if the charged amount is not the same, it can still cause overcharging and overdischarging phenomena.4. Consistent internal resistance:Each individual physical battery can theoretically be divided into two parts: a pure battery and an internal resistance, and inconsistent internal resistance will cause asynchronous charging and discharging of the pure battery.
-
13
2025-02
587Ah large battery cell, building the value foundation of TWh era with reliability, efficiency and stability
587Ah high-capacity energy storage battery cells are committed to leading energy storage from the era of engineering integration to a new era of native reliability with reliability and efficiency. Building the cornerstone of trust with reliability. On the safety level, the three major safety technology cornerstones firmly establish the intrinsic safety defense line of Fengpeng Big Battery 587Ah. The product has passed multiple rigorous safety tests such as thermal runaway, overcharging, and short circuit. Efficiently enhancing value density, we continuously drive efficiency leaps through ten thousand cycle technology and ion sponge technology platform technology. Currently, we have achieved high energy efficiency performance across all temperature ranges, with energy efficiency reaching 85% at 5 ℃, exceeding 95% at 25 ℃, and exceeding 96% at 45 ℃; At room temperature, the 0.5P cycle life has exceeded 10000 times, significantly increasing customer value.The application of energy storage is expanding from a single photovoltaic system to various extremely complex environments such as power grid peak and frequency regulation, industry and commerce, islands, and high-altitude extreme cold. The traditional 'one size fits all' battery cell solution is difficult to meet the high-performance and reliability requirements of energy storage systems in differentiated scenarios.Based on the LTSC low-temperature superconducting communication platform and high-temperature long cycle platform technology, we have developed and laid out the full temperature range multi scenario Fengpeng high-capacity battery cell 587Ah, fully expanding the application boundaries of energy storage, and committed to helping energy storage projects operate safely, efficiently, and stably in diverse global scenarios. Large capacity battery cells are a key technological carrier for the energy storage industry to shift from cost competition to value trust. We will always adhere to technology as the foundation, continuously empower the industry with "reliable and efficient" energy storage product solutions, and strive to work together with customers to build a trustworthy, reliable, and efficient energy storage TWh era new ecology.
-
14
2025-03
TOP2！ Congratulations to our partner GREAT POWER
On March 3rd, China's authoritative data agency GGII released the "2024 China Industrial and Commercial Energy Storage System Market Analysis and Enterprise Shipment Ranking", and GREAT POWER's 2024 industrial and commercial energy storage system shipment volume jumped again, ranking TOP2! GREAT POWER officially entered the industrial and commercial energy storage track with the establishment of smart energy in 2023, and rushed into the TOP3 that year! In 2024, GREAT POWER will achieve a comprehensive strategic upgrade of "technology manufacturing market" for smart energy, and its product and market strength will continue to rise. In 2025, GREAT POWER Smart Energy System will evolve again around "intelligence, marketization, and integration", reshape smart energy through AI system, reconstruct value model as a comprehensive energy service provider, and achieve the ultimate goal of "putting users at the center and serving them wholeheartedly"!As the partner of GREAT POWER, Be Power is committed to providing customers with high-quality and customized solutions；We are the number one Chinese battery supplier delivered to automotive OEM in Brazil.We offered battery for over 800K set HESS systems;We are the best UTV battery supplier and exporter in China, with over 15 years of experience in lithium battery research and development. We are the best battery pack solution provider in China. Our battery systems are warmly welcomed in over 30 countries applied on electric trucks，electric light vehicles，electric UTV, electric sweepers, container energy storage systems, 215Kwh commercial and industrial energy storage systems etc. With top-notch technical team in China we are providing the toughest technical and highest level safety products.v
-
12
2024-12
Lithium ion batteries: design principles and performance optimization
Lithium batteries, as one of the key technologies for modern energy storage, play an important role in many fields. This article delves into the design principles of lithium batteries, including working mechanisms, material selection, structural layout, and design principles, with the aim of providing professional references for further research and application of lithium batteries.1.The working mechanism of lithium batteriesLithium batteries achieve energy storage and release through the insertion and extraction of lithium ions between positive and negative electrode materials. During charging, lithium ions are deintercalated from the positive electrode material and move into the negative electrode material through the electrolyte, where they are embedded; The discharge process is the opposite, where lithium ions are deintercalated from the negative electrode material and migrate back to the positive electrode material, while generating current with the flow of electrons.2. Cathode materialCommon positive electrode materials include lithium cobalt oxide (LiCoO2), lithium iron phosphate (LiFePO4), etc.These materials can provide a stable source of lithium ions and good electrochemical performance during the charging and discharging process.3. Negative electrode material Common negative electrode materials include various forms of carbon materials, such as graphite, artificial graphite, etc.It has a layered structure that can accommodate a large amount of lithium ions, providing a high theoretical capacity.4. ElectrolyteComposed of organic solvents and lithium salts (such as LiPF6, LiBF4, etc.).It must have high ion conductivity and chemical stability to ensure the performance of the battery under different conditions.5. DiaphragmPorous film, used for physical isolation of positive and negative electrodes, allowing lithium ions to pass through.The material is usually polyolefin (such as PE, PP) or their composite materials, which have certain mechanical strength and thermal stability.5. Structural layoutThe shape of a single battery can be circular or square, and the manufacturing process includes stacking and winding.Structural design also involves the integration of battery packs, the parallel and series combination of multiple individual cells, and the design of a battery management system (BMS) to monitor and maintain the performance and safety of the battery pack.6. Design principlesThe design principles of lithium batteries aim to optimize the performance of each component to achieve high energy density, long cycle life, good safety performance, and economic efficiency. Designers need to comprehensively consider the compatibility of materials, the working environment of batteries, and cost-effectiveness to meet the needs of different application scenarios.7. ConclusionConclusion: The design principles of lithium batteries cover multiple aspects, and a deep understanding of these principles is crucial for improving the performance of lithium batteries and expanding their application fields. When selecting lithium-ion batteries, we can judge the quality of the battery by thoroughly understanding its specifications, manufacturer, technical parameters, etc., which helps us better choose the battery.
-
01
2024-11
Chapter on Large scale Energy Storage in Western Regions.
The 600MWH photovoltaic energy storage project in Jiashi, Xinjiang, improves power generation efficiency and stability through photovoltaic energy distribution and storage. The annual power generation is 1.04 billion kilowatt hours, and the annual carbon dioxide reduction is 812000 tons.The 140MWh complementary project of animal husbandry and light in Bachu, Xinjiang, integrates "light storage+modern animal husbandry" organically and applies solar power generation to the breeding and animal husbandry process.The 150MWh photovoltaic energy storage project in Jimsar, Xinjiang, integrates photovoltaic energy storage and protects desert oases, effectively solving the problem of unstable energy storage and power supply in desert areas.Sichuan Kangding 4300 meter altitude photovoltaic off grid energy storage project aims to address the instability and vulnerability of power supply in high-altitude areas.High safety, long cycle, high energy efficiency.Energy guardians in various complex environments.Assist in the integration of light and energy storage in border towns, and write a new chapter in energy.
-
18
2024-10
Reasons and Effects of Gas Generation in Lithium Batteries
IntroductionLithium batteries may produce gas during use. If too much gas is produced, it not only affects battery performance but may also cause safety issues. Therefore, it is of great practical significance to conduct in-depth research on the causes and impacts of gas production in lithium batteries, and to take effective preventive and improvement measures. The reason for excessive gas production in lithium batteries 1. When the battery is overcharged, lithium ions are excessively embedded in the negative electrode, which may lead to electrolyte decomposition and gas production. Overcharging can increase the internal pressure of the battery, affecting its stability and safety. 2. Excessive deep discharge can damage the structure of the negative electrode material, resulting in the generation of gas. Overdischarging can reduce the capacity and lifespan of the battery, while also increasing safety risks. 3. High temperature environments can accelerate internal chemical reactions in batteries, leading to electrolyte decomposition and gas generation. High temperatures can also affect the performance and lifespan of batteries, and may even cause thermal runaway. 4. Internal short circuits in batteries can cause high currents, resulting in the generation of a large amount of heat and gas. Internal short circuits may be caused by manufacturing defects, impurities, or mechanical damage. 5. As the battery ages, the internal materials of the battery may gradually decompose and produce gases. Aging of batteries can reduce their performance and lifespan, and increase safety hazards. 6. Defects in the manufacturing process of batteries, such as impurities, micro short circuits, etc., may also lead to gas generation. Manufacturing defects can affect the quality and reliability of batteries. The impact of excessive gas production in lithium batteries 1. It will affect battery performance. Excessive gas production can lead to an increase in internal pressure of the battery, which may damage the sealing structure of the battery and cause electrolyte leakage, thereby reducing the capacity and cycle life of the battery. In addition, the generation of gas can also affect the internal resistance and charge discharge efficiency of the battery. 2. If the internal pressure of the battery is too high, it may cause the safety valve to open, and even lead to safety accidents such as explosions and fires. Meanwhile, harmful substances in gases may also pose a threat to human health and the environment. Preventive and Improvement Measures 1. Optimize Charging Strategy ① Using an intelligent charger can monitor the battery status and prevent overcharging. The intelligent charger can automatically adjust the charging current and voltage based on parameters such as battery voltage, current, and temperature, ensuring that the battery is charged within a safe range. ② When the battery is close to being fully charged, reduce the charging current. Trickle charging can reduce the decomposition of electrolyte and lower the risk of gas production. 2. Set the minimum discharge voltage threshold for the battery to avoid excessive discharge. In the battery management system, an over discharge protection function can be set, which automatically cuts off the circuit when the battery voltage is below the set threshold to prevent the battery from continuing to discharge. 3. Temperature control ① In the design and use of batteries, heat dissipation measures should be considered, such as using heat sinks, fans, etc., to effectively reduce the temperature of the battery, minimize the decomposition of electrolyte, and reduce gas generation. ② High temperature environments can accelerate battery aging and gas production, so it is advisable to avoid using and storing batteries in high-temperature environments as much as possible. 4. Optimization of Battery Management System ① Adopting advanced Battery Management System (BMS) to monitor battery status and adjust working conditions in a timely manner. BMS can monitor real-time parameters such as voltage, current, temperature, and internal resistance of the battery, adjust the battery's charging and discharging strategies based on these parameters, and ensure that the battery operates within a safe range. ② BMS should have overcharge, overdischarge, and overheat protection functions. When there is an abnormal situation with the battery, BMS can promptly cut off the circuit to protect the safety of the battery. 5. Regular maintenance and inspection① Through regular inspections, abnormal conditions of the battery can be detected in a timely manner and corresponding measures can be taken to deal with them. ② If abnormal conditions such as excessive gas production, decreased capacity, and increased internal resistance are found in the battery, timely maintenance or replacement should be carried out to ensure the safety and performance of the battery. 6. Choose electrolytes and electrode materials with good electrochemical stability. High quality electrolyte and electrode materials can improve the performance and safety of batteries, and reduce the risk of gas production. 7. When designing batteries for safety, pressure relief devices such as safety valves should be considered to prevent excessive internal pressure. ConclusionThe generation of gas during the use of lithium batteries is a complex problem, which involves multiple factors such as overcharging, overdischarging, high temperature, internal short circuit, battery aging, and manufacturing defects. Excessive gas production can have a serious impact on battery performance and safety. In order to effectively reduce gas production in lithium batteries, extend battery life, and ensure safe use, a series of preventive and improvement measures need to be taken, including optimizing charging strategies, preventing over discharge, temperature control, optimizing battery management systems, improving manufacturing quality, regular maintenance and inspection, using high-quality materials, and safety design.
-
26
2024-09
Our New LFP cells Polar series can be charged at -30℃！
New Polar series battery cells is ready for the market! It's specifically designed for low-temperature working condition.It can be charged even in -30℃ environments supported by LTSC low-temperature superconducting technology.And not only does it perform well in low-temperature environments, but it can also be used normally at a temperature of 60℃! The operating environment temperature of the battery cell spans 90℃. Powered by self-healing SEI film technology, which can minimize losses during use and has a long service life of over 5000 cycles, enough for users to use for 15 years. The cells passed thermal runaway test and has excellent safety performance. There are three cells 50/72/100Ah.Be Power is committed to providing customers with high-quality and customized solutions；We are the number one Chinese battery supplier delivered to automotive OEM in Brazil.We offered battery for over 800K set HESS systems;Our battery systems are warmly welcomed in over 30 countries applied on electric trucks，electric light vehicles，electric UTV, electric sweepers, container energy storage systems, 215Kwh commercial and industrial energy storage systems etc. With top-notch technical team in China we are providing the toughest technical and highest level safety products.For any request pls feel free to contact us!
-
13
2024-09
Fun talk about the charging and discharging principles of batteries
When we talk about batteries, we are actually discussing a magical chemical process - the principle of battery charging and discharging. This process may seem simple, but it contains rich scientific knowledge that not only affects various aspects of our daily lives, but also serves as a key driving force in the era of new energy. Today, we will explore the secrets of battery charging and discharging in a simple and understandable way.The key to battery charging: the secret of chemical reactionsThe 'magic' of batteries: electrochemical reactionsSimply put, battery charging is a process of storing energy. Imagine a battery is like a kettle, and when charging, it's the process of pouring water into the kettle. The 'water' here is actually electrical energy that enters the battery through a charger. From a more professional perspective, the energy storage inside the battery is achieved through chemical reactions. When you charge a battery, the electrical energy drives the chemical substances inside the battery to react, which converts the electrical energy into chemical energy and stores it in the battery.Charging process: Under the action of external voltage, the electrons of the positive electrode material are forcibly snatched and reach the negative electrode material through the external circuit. At this point, the positive electrode material loses electrons and becomes positively charged and unstable, causing lithium (sodium) ions to be deintercalated through the electrolyte and continuously reach and embed in the negative electrode material to neutralize electrons. After saturation, the charging process is completed.The Magic of Battery Discharge: The Release of EnergyWhen the battery is charged and the energy recipient (such as a mobile phone or electric vehicle) needs electricity, the battery enters discharge mode. The process of discharging is like pouring water out of a kettle, releasing stored energy. At this point, the metal ions that originally lost electrons at the positive electrode will "go home" through the electrolyte and recombine into metal, while the metal ions at the negative electrode will release electrons and be transmitted to the receiver through the circuit.Discharge process: When the external circuit is connected, due to the unstable crystal structure of the negative electrode, lithium ions quickly detach and continuously return to the positive electrode through the electrolyte. At this point, electrons are driven from the negative electrode through an external circuit to reach the positive electrode and neutralize lithium ions, thus forming an electric current.The process of charging and discharging can be vividly described using the "rocking chair" model. In this model, the positive and negative electrodes of the battery are like the two ends of a rocking chair, which constantly swings back and forth during the charging and discharging process.During the discharge process, the chemical substances inside the battery will gradually be consumed. In this way, when the battery runs out of power, it's like the water in a kettle has already been emptied, and the 'magic' of the battery comes to an end. However, by replacing the battery or charging it, this process can cycle back and forth, providing a continuous source of power for our lives.
