Common faults and troubleshooting methods of lithium batteries

Common faults and troubleshooting methods of lithium batteries 1. Why does the battery have zero voltage (low voltage)? What? 1) The battery is externally short-circuited or over-discharged or reversely charged (battery positive and negative or reverse connection); whether the circuit is normal; spot welding Are there traces of scorching on the battery? 2) The battery continues to be overcharged under high power and high current, which leads to the expansion of the battery's range of motion and direct contact with the positive and negative electrodes to short-circuit. Treatment: 1) Know the specific purpose of the battery; 2) After charging, connect the same type of battery to the electrical appliance to determine whether the electrical appliance is normal; 3) Charge it with 1C current for 30 minutes and keep it turned on for about 10 minutes. If the open circuit voltage of the battery is stable within the normal voltage range of the battery, the battery can basically return to normal. If the battery is damaged, the voltage cannot be restored; if this phenomenon occurs when the battery is not in use, the 1C charging voltage cannot be restored, and further analysis is required by professional and technical personnel. 4) It is recommended to use batteries with electronic protection components such as safety tubes and temperature switches or integrated circuits. 2. What if 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 whether the battery connection, electronic components, and protection circuit are abnormal; 3) Check the charging device or charging Whether the circuit has a charging voltage/current output under the charging state; 4) The ambient temperature is too high and the charging efficiency is low (the optimal temperature does not exceed 40°C); Treatment: 1) Know the specific usage and usage conditions of the battery; 2) Change The battery of the same type and a multimeter (current gear) are charged in series in the circuit, and the charging device is judged whether it is normal according to the charging current value. 3) Repeat the single battery zero voltage step analysis and processing; 4) It is recommended that customers choose a charging device or charging circuit with stable performance; 3. What happens when the battery/battery pack cannot be discharged? Phenomenon: After charging, the load enters the device, The device cannot work, the open circuit voltage of the battery has not changed or changed little 1) Check whether the battery/battery pack voltage is zero and whether the internal resistance is high; 2) The electronic components and protection circuits connected in the battery pack are not damaged; 3) Check the equipment Whether the discharge circuit is normal. Treatment: 1) The equipment is connected to the same type of charged battery/battery pack, and whether the equipment is working normally; 2) Use a multimeter to check whether the internal electronic components of the battery and the protection circuit are normal. 3) Repeat the single battery zero voltage step analysis and processing; 4) The electrical discharge circuit is abnormal, and it is recommended to repair and replace it in time; 5) If the battery pack is not modified by itself, further analysis is required by professional and technical personnel. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the effects of fast battery charging?