Analyze the repair of lithium battery failures in electric vehicles

① When the battery cannot be charged, it cannot be charged. It can be divided into the following reasons: the charger is connected reversely or the charger is faulty; the protection board protection is not restored or the protection board fails; the battery pack and the electrical appliance are externally disconnected. In order to solve the above problems, search in order: whether the charger is connected reversely, whether the positive and negative plugs of the battery pack are connected reversely; re-enable the electrical appliances to release the protection board protection, and measure whether the protection board MOS tube has a driving voltage; find the wiring connection Is it loose or disconnected? ②The battery pack with short range is discharged quickly when used. The reasons for this situation are: the lithium battery is not fully charged; the voltage capacity of a single string varies greatly; the battery pack is short-circuited or the battery pack is self-discharged, causing the battery The battery was used up as soon as the bag was fully charged. To solve the above defects, recharge the battery pack or replace bad batteries. ③The battery plate softening failure is mainly manifested as the surface of the positive plate gradually softens to a paste from the beginning of the solid. As the surface area decreases, it will lead to a decrease in battery capacity. Repair method: After discharging 10.5v, discharge the bulb for 1-5 hours. Then there is the activator, activate the repair. In this way, it is possible to repair, but in heavier cases, it can only be replaced with a new one. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous article: Why has lithium battery electric vehicles become popular until now?