Analysis of new methods for battery maintenance in winter

A new winter battery maintenance method. Battery maintenance. Due to the low temperature in winter, the activity of active materials in the battery is reduced or even frozen, the use is slow, the discharge cannot be discharged, and the discharge efficiency is reduced. Generally speaking, the power of the battery will drop by about 40%. When the outdoor environment temperature is 5℃, the discharge power can be only 50-60% of normal temperature (25℃). In addition, batteries used for more cycles or longer life tend to lose more power. Battery maintenance As the saying goes, daughters should be pampered, and batteries should be pampered too. The battery determines whether our work can start to be used normally, so it is necessary to check the battery regularly, replace and maintain it in time. There is a saying in the industry: take the battery capacity temperature of 25℃ as the standard, and the temperature drops by 1℃, and the battery capacity drops by 1%. When the battery is in a low temperature environment in winter, the cycle capacity is low, the electrolyte viscosity increases, and the chemical reaction resistance increases. In the same charging time, the charging capacity in a 5°C environment is only 70% of that in a 25°C environment. Maintenance of the battery In winter, it is recommended to use the battery with a good battery. 1. Check whether the outer box is damaged. If it is deformed or damaged, please open the box to confirm whether the battery is damaged or deformed; check whether the battery meets the required standards. When entering the warehouse, please clearly indicate the type, specification, date and other information of the incoming materials, so that the first-in first-out management can identify products with a long storage time. The battery is in use 1. The normal voltage of the battery is 3.3v-4.2v, and the battery should be controlled within this range when charging and discharging; it is recommended to test the voltage of each battery before charging and discharging the battery. The battery voltage is about 3.8v within 1 month after delivery, and the voltage difference of each chip is within 20mV. The battery pack is in use, and the battery voltage difference range is 100mV; 2. The maximum limit voltage that the battery can withstand is 4.2v, and the minimum limit voltage is 3.0v. When the battery voltage is higher than 4.2v or lower than 3.0v, the charging and discharging performance and safety performance of the battery will be damaged, causing the battery to generate heat, leak air, and swell. Preventive measures for battery maintenance and discharge: The discharge temperature range is 10~45℃, and the maximum current must not exceed the specification requirements. Battery swelling, deformation, leakage or voltage difference ≥100mV is not allowed to discharge; the lower limit voltage of discharge shall not be lower than 3.2v, and the surface temperature of the battery after high current discharge shall not be higher than 80℃. The maintenance of the battery pay attention to the storage of the battery 1. Pay attention to keep the warehouse dry, clean and not crowded. It is best to keep a space of 0.5-0.8m between boxes; at the same time, there must be personnel on duty, and warehouse personnel must have a high fire awareness; the warehouse should be equipped with: fireproof sand, asbestos blankets, asbestos gloves, crucible tongs, and masks. 2. During transportation, the battery should be supplemented, and anti-collision measures should be taken to prevent the battery from being severely impacted or vibrated; if any abnormal characteristics of the battery are found, such as damage to the plastic edge of the battery, damage to the casing, peculiar smell of the electrolyte, electrolysis If the battery leaks, please do not use it, the battery has electrolyte leakage or the electrolyte smells. Keep away from the fire source to prevent danger. Battery maintenance Three do not do the battery maintenance 1. Non-professionals are not allowed to dissect the battery, otherwise it will cause an internal short circuit, and cause safety problems such as gas and fire. 2. Theoretically speaking, there is no flowing electrolyte in the lithium polymer battery, but if the electrolyte leaks and contacts the skin, eyes or other parts of the body, you should immediately rinse with water and seek medical attention immediately; 3. Do not burn the battery under any circumstances Or put it in a fire, otherwise it will cause the battery to burn, which is very dangerous, absolutely forbidden; do not soak the cells in liquid, such as fresh water, sea water, drinks (juice coffee, etc.). Small grid reminds: When it is cold, take care of your battery and take care of yourself! Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one: Analysis of lithium battery SEI film Formation mechanism