Common lithium-ion battery malfunctions
●Uneven charging causes low voltage: During the charging process after battery testing, uneven charging of the cells can occur due to inconsistent contact resistance or charging current in the testing cabinet. The voltage difference is small during short-term storage, but significant during long-term storage. This low voltage does not indicate a quality problem and can be resolved by recharging. Voltage is measured after storing the battery for more than 24 hours following charging during production.
● Abnormal Temperature: If the lithium-ion battery experiences abnormal temperature during charging or discharging, such as overheating, the cause may be a minor short circuit within the battery.
●Short battery pack cycle life: The battery pack ends its life within the promised service life. This is because of poor consistency of the battery pack or particularly poor performance of individual series-connected cells, which makes the battery pack unable to be fully charged during charging and unable to be fully discharged during discharging.
● The battery pack may suddenly stop working during use: This could be because the lithium-ion battery has been completely discharged and reached the minimum voltage limit of the protection board or controller, causing the protection board or controller to stop working; or the continuous operating current is too large, exceeding the design protection current of the protection board or the continuous current of the controller, causing the protection board or controller to stop working. Both of these can cause the battery pack to suddenly stop working.
● Battery cells bulge due to air or liquid leakage with a pungent odor; screws turn black; cells soften; deposits harden; overheating; electrode detachment. Other signs include overcharging, over-discharging, and overload.
