Summarize the common problems in the use of lithium batteries

What problems do lithium batteries encounter during use? List the common problems in the use of lithium batteries: the battery pack cannot be charged. The battery pack cannot be charged during charging. The reasons can be divided into the following types: charger connection reverse or charging Failure of the device; the protection board is not restored or the protection board fails; the battery pack is connected to the outside of the electrical appliance. When dealing with the above-mentioned undesirable phenomena, you should know whether the charger is reversely connected, whether the battery pack charging positive and negative plugs are reversely connected; restart the appliance, remove the protection board, and measure whether the MOS tube has a driving voltage; check whether the connection is loose or broken Open the connection. The battery pack cannot be discharged The battery pack cannot be discharged normally due to the following reasons: the battery pack voltage drops protection board protection or controller protection; the protection panel or controller is damaged; the positive and negative electrodes are connected; the circuit is disconnected or the switch is not turned on. To solve the above defects, you can charge the battery and find the protection board or line connection problems to solve. When the battery pack is dead, it will stop before the battery is cycled and the rechargeable battery is cut off. This situation is due to the inconsistent energy of a series of battery packs. The first charge of high or low capacity is protected by the protection board, so that other series of batteries stop the charging process without charging. In this case, the battery pack can be charged with a balanced charger to keep the voltage of each series consistent. If the capacity difference is large, the battery with the large difference must be replaced. But the most important thing is that the battery capacity must be matched and checked before assembly, otherwise it will be very troublesome to re-disassemble the single string after it has been taken out. 4. Short battery life. The battery quickly runs out of power during use. The reasons are: the battery is not fully charged; the single series voltage tolerance is large; the battery is short-circuited or the battery self-discharges are large, and the battery is consumed as soon as it is fully charged. For the above defects, the battery pack can be charged or the defective battery can be replaced. 5. Battery pack The voltage of the low-voltage battery pack is only half of the nominal voltage or negative voltage. This situation usually occurs when the battery pack has just been assembled. The reason is that the battery pack is incorrectly connected, the positive and negative electrodes are reversely connected, or some batteries are not fully connected. If the battery pack is normal after charging, but there is a low voltage immediately after standing or using for a period of time, this situation may be due to a large self-discharge of the battery or a small short circuit in the battery pack. Rated voltage drop or negative voltage must be reconnected correctly. If the battery is charged at a low voltage, the defective battery must be replaced. 6. The battery temperature is high. When the battery pack is charged and discharged, the temperature is abnormally high and hot. This may be due to the high internal resistance of the battery or a small short circuit in the battery pack, which causes the charging and discharging temperature of the battery pack to increase. It is very dangerous for the battery to work for a long time at high temperature. In this case, it is necessary to replace the defective battery or repair the micro short circuit. 7. The battery suddenly stops working during use. The battery pack suddenly stops working during use, which may be caused by battery discharge. When the minimum voltage of the protection board or controller is reached, the protection board or controller stops working. Or the continuous working current is too large (such as when the electric vehicle is started or climbing a hill), and the protection current exceeds the protection board or the DC protection board of the controller or the controller stops working, which will cause the battery pack to suddenly stop working. The above situation can be solved by charging the battery pack or restarting the appliance or by adjusting the parameters to change the protection board and the controller. 8. The battery pack explodes. The battery pack explodes statically or during use. It is rare that the battery pack catches fire, but the consequences are serious. The reason may also be caused by an external or internal short circuit for a long time. An external short circuit is equivalent to an instantaneous super current discharge, which exceeds the limit of the battery protection board, and the gas that appears inside is discharged instantly, which is very dangerous. Internal short circuit and poor sealing. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Process that lithium batteries must go through before leaving the factory