Several major factors affecting the performance of lithium battery

　　1: discharge current

　　The size of the discharge current, the effect on the lithium battery, different lithium batteries, support different discharge multipliers, usually 0.2C, 0.5C 1C 3C 5C 10C 20C and other battery cells. The same battery cell, in different discharge At the rate, the capacity maintenance rate is different. The greater the discharge rate, the less the capacity is released. Therefore, when choosing a lithium battery, pay attention to selecting a battery suitable for load working current. Of course, the larger the battery of the discharge multiplier, the less the nominal capacity of itself, the relatively low energy density, the internal pole ear and the welding position, the better the passability of the current, and the smaller the internal resistance of the battery. The same battery, long -term doubling discharge, also affects the cycle life, and the cycle life will be attenuated faster.

　　2: charging current

　　What effect does charging current affect lithium batteries? Generally, the charging rate of lithium batteries is 0.2C. For example, a 10AH lithium battery is generally used with a 2A charging current. Full 30 minutes and 40 minutes full of these. The charging current has a greater impact on the capacity of the battery capacity and cycle life and safety. The larger the charging current, the smaller the actual capacity of the recharge. Safety will also decline, and everyone knows that most lithium battery burning accidents occur during the charging process of batteries.

　　However, the length of the charging time directly affects the customer's experience. What should I do? Our specific projects, specific application scenarios, must also choose the most suitable project itself.

　　3: Work temperature

　　Generally conventional lithium batteries, the charging temperature is 0 ~ 45 degrees, the discharge temperature is -20 ~ 60 degrees. In the low temperature state, the lithium ions are not active, the temperature is too high, and the lithium ion is too active, so there is generally a clear lithium battery. The working temperature range, the energy density of the lithium battery is high, the storage energy is large, but it is also very fragile. How to use it strictly in accordance with the manufacturer's instructions. In the low temperature state, charging will cause lithium analysis. There are metal lithium analysis on the surface of the battery anode, forming branches crystal, piercing the diaphragm between the anode and the cathode, causing short circuits inside the cell, causing fever, burning, and even explosion. With the innovation of technology, through the improvement of electrolyte, special lithium batteries can now be charged at -20 degrees ~ 45 degrees, and -50 ~ 60 degrees discharge. Of course, the cost will be higher.

　　The effect of temperature on the battery discharge performance. The lower the working temperature, the less the capacity of the release is tested with the same current. At the same temperature, the capacity maintenance rate is different at the same temperature. The general capacity maintenance rate of ternary lithium batteries is about 80%, and lithium iron phosphate is generally about 60%.

　　At present, the low-temperature lithium battery, -40 degrees 0.5C capacity maintenance rate is about 80%. The low temperature and high magnification can reach 1C 3C low-temperature discharge. How does it perform at high temperature? In the maximum temperature prescribed by the manufacturer, the impact on the capacity has little effect, but the long -term high temperature work also affects the cycle life of the battery. There are many battery cells that are known as high temperature on the market. It is also possible, and there is no abnormality on the surface. Long -term testing is easy to drum, leakage, fire and so on.

　　4: work conditions

　　Different operating conditions actually have a greater impact on the lithium battery. Like the digital products we use daily, it is charged one day, it is full at night, and the daylight is shining. Put a little electricity, and it will be charged immediately. The first case has a greater impact on the life of lithium battery, and the cycle life is decaying more powerful.

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