Do you know the four major factors affecting lithium-ion batteries

The size of the discharge current, the impact on the lithium-ion battery, different lithium-ion batteries support different discharge rates, usually 0.2C, 0.5C, 1C, 3C, 5C, 10C, 20C and other discharge rate batteries, the same style The battery cell has different capacity retention rates under different discharge rates. The larger the discharge rate, the less the discharged capacity. Therefore, when choosing a lithium-ion battery, pay attention to choosing a battery that is suitable for the load's operating current. Of course, a battery with a higher discharge rate will have a lower nominal capacity and a relatively lower energy density. The internal tabs and welding positions, the better the current flow, and the lower the internal resistance of the battery. The same battery, long-term high-rate discharge, also affects the cycle life, and the cycle life will decay faster. 2. What are the effects of charging current on lithium-ion batteries? Generally, the recommended charging rate for lithium-ion batteries is 0.2C, 10Ah lithium-ion batteries, generally 2A charging current, 0.5C charging applications are also more, of course, there are many fast charging methods on the market, 1C-2C methods, Fully charged in 30 minutes and charged in 40 minutes. The charging current has a greater impact on the capacity retention rate, cycle life and safety of the battery. The larger the charging current, the smaller the actual charged capacity and the greater the cycle life attenuation. Safety will also decrease. Everyone knows that most of the burning accidents of lithium-ion batteries occur during the battery charging process. 3. The working temperature is generally normal lithium ion battery, charging temperature is 0~45 degrees, discharging temperature is -20~60 degrees, in low temperature state, lithium is not active enough, temperature is too high, lithium is too active, so lithium ion battery is general There is a clear operating temperature range, the lithium-ion battery has high energy density and more stored energy. At low temperatures, charging will cause lithium ions to evolve. Lithium ions will precipitate on the anode surface of the battery, forming dendrites, piercing the diaphragm between the anode and the cathode, causing a short circuit inside the cell, causing heating, burning, or even explosion. With technological innovation and improved electrolyte, special lithium-ion batteries can now be charged at -20°C to 45°C and discharged at -50°C to 60°C. Of course, the cost is a little higher. The influence of temperature on battery discharge performance, the lower the working temperature, the less the discharged capacity will be when tested with the same current. Lithium-ion batteries of different materials have different capacity retention rates at the same temperature, -20 degrees. About, ternary lithium-ion batteries generally have a capacity retention rate of about 80%, and lithium iron phosphate batteries are generally about 60%. The current low-temperature lithium-ion battery has a capacity retention rate of -40°C and 0.5C, which is about 80%. The low-temperature and high-rate can reach 1C and 3C low-temperature discharge. How does it perform at high temperatures? Within the maximum temperature specified by the manufacturer, it has little effect on the capacity, but long-term high temperature work also affects the cycle life of the battery. 4. Different working conditions have a greater impact on lithium-ion batteries. The digital products used daily are charged once a day, full at night, and light during the day. This is deep charging and deep discharging. If a part of the battery is used, then Full, this situation is shallow charging and shallow discharge. The first situation has a greater impact on the life of lithium-ion batteries, and the cycle life attenuation is more severe. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.