What are the situations when the battery/battery pack cannot be charged?

What are the situations when the battery/battery pack cannot be charged? 1) Check whether the battery or battery pack is a zero-voltage, high internal resistance battery; 2) Check the connection of the battery pack and whether the electronic components and protection circuit are abnormal; 3) Check whether the charging equipment or the charging circuit is charged in the charging state Voltage/current output; 4) Is the ambient temperature too high resulting in low charging efficiency (the optimal temperature should not exceed 40°C); Solution: 1) Know the customer’s detailed battery usage and usage conditions; 2) Use the same model The battery and the multimeter (current gear) are connected in series to the circuit for charging, and the charging device is judged whether it is normal according to the charging current value. 3) Repeat the single battery zero-voltage step decomposition and solution; 4) Suggest that customers choose charging equipment or charging circuits with better stability; 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: What to pay attention to when discharging electric vehicle batteries