The influence of temperature on the performance of several lithium batteries

Regarding lithium batteries, there is currently no clear theory to support the internal resistance, discharge platform, life and capacity of lithium batteries under various temperature functions. Related calculation formulas and mathematical models are still in the exploratory stage. Generally speaking, lithium batteries are not sensitive to the temperature in the range of 0-40c, but beyond this range, their life and capacity will be reduced. There is no specific method for quantitative determination. Due to the high activity of lithium batteries, consistency is also the biggest problem. Even the same batch of products, the same material, and the same process have very different functions. After many tests, the low-temperature performance of lithium batteries of different materials is also different. Now the hottest lithium iron phosphate has the lowest low temperature function. The release capacity of our products at -10°C is 89% of the maximum release capacity, which should be relatively high in the industry. At 55°C, the discharge capacity can reach 95%, and the attenuation at lower temperatures is still small. This is still the product to be inspected, you know, its quality is much higher than the normal product on the assembly line. Relatively speaking, lithium manganese oxide, lithium cobalt oxide and ternary products have better low-temperature functions, but they also have limitations; the sacrifice is high-temperature functions. At present, the safety function of blown lithium iron phosphate in the industry is relatively high, and the high temperature function is also relatively good. In fact, the activity of the battery is not as high as the above three, and it is relatively safe. The overall function is still not as good as manganese, lithium or ternary. Therefore, the service life of lithium batteries in winter must be shorter than in summer. By the way, it is best not to charge lithium batteries in winter. Due to the low temperature, the lithium ions nested on the negative electrode will crystallize and directly penetrate the gap. Under normal circumstances, there will be a small short circuit, which will affect the service life and function. Therefore, some people complain that lithium batteries cannot be recharged in winter. The battery management system is partly due to product maintenance and partly due to quality issues that cannot be charged. It is said that ATL (the domestic leader, which has just taken Apple's share) has similar problems with its products. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Analyze the advantages and disadvantages of Tesla electric vehicle battery technology