The size of the discharge current affects lithium battery . Different lithium batteries support different discharge rates, usually 0.2C, 0.5C 1C 3C 5C 10C 20C and other discharge rate batteries, the same type of battery, under different discharge rates, the capacity retention rate is different, the greater the discharge rate, the less capacity is released, so when choosing a lithium battery , Should pay attention to choose the battery suitable for the working current of the load. Of course, the battery with a larger discharge rate will have less nominal capacity and relatively lower energy density. The better the current passing through the internal tabs and the welding position, the smaller the battery internal resistance. The same type of battery, long-term large rate discharge, also has an impact on the cycle life, and the cycle life will decay faster.

　　What effect does the charging current have on the lithium battery? The recommended charging rate of general lithium batteries is 0.2C. For example, a 10Ah lithium battery generally uses 2A charging current, and there are many applications of 0.5C charging. Of course, many fast charging solutions on the market, 1C-2C solutions Fully charged in 30 minutes and fully charged in 40 minutes. The charging current has a greater impact on the capacity retention rate and cycle life and safety of the battery. The larger the charging current, the smaller the actual charged capacity and the more severe the cycle life attenuation Safety will also decline. Everyone knows that most of the lithium battery burning accidents occur during the battery charging process.

　However, the length of charging time directly affects the customer's experience, what should I do? For our specific projects and specific application scenarios, we have to choose the most suitable project itself.

In general conventional lithium batteries, the charging temperature is 0 ~ 45 degrees and the discharge temperature is -20 ~ 60 degrees. At low temperatures, lithium ions are not active enough, the temperature is too high, and lithium ions are too active, so lithium batteries generally have a clear The operating temperature range of lithium batteries is high, the energy density is high, and the stored energy is large, but it is also very fragile. How to use it strictly according to the manufacturer's instructions. At low temperatures, charging will cause lithium precipitation, and metallic lithium will precipitate on the anode surface of the battery, forming dendrites, piercing the separator between the anode and the cathode, causing a short circuit inside the cell, causing heating, burning, and even explosion. With the technological innovation, through the improvement of the electrolyte, the special lithium battery can now be charged at -20 degrees to 45 degrees, and discharged at -50 to 60 degrees. Of course, the cost will be higher.

　The effect of temperature on the discharge performance of the battery. The lower the operating temperature, the less capacity is released with the same current test. The capacity retention rate of lithium batteries of different materials at the same temperature is different, about -20 degrees The general capacity retention rate of ternary lithium batteries is about 80%, and lithium iron phosphate is generally about 60%.

　At present, the low-temperature lithium battery has a capacity retention rate of 0.5C at -40 degrees, which is about 80%. The low-temperature high-rate can achieve 1C 3C low temperature discharge. How does it perform at high temperatures? Within the maximum temperature specified by the manufacturer, it has little effect on capacity, but long-term high-temperature operation also has an impact on the battery's cycle life. Many batteries on the market that are called high-temperature, steal the concept. It is possible to work at high temperature in a short time, and there is no abnormality on the surface. Long-term testing can easily lead to bulging, leakage, and fire.