What are the signs of scrapped electric vehicle batteries?

During the use of electric vehicle batteries, the capacity gradually decreases and the performance gradually declines until the end of life. When the user's requirements are not met, the battery must be replaced. In order to ensure the reliability of operation, it is necessary to pay close attention to the operating status of the battery and replace the battery in time. The following situations are likely to be a sign of the need to replace the battery. It is recommended to go to a professional electric car shop or repair shop for testing. 1. The actual discharge capacity of the battery is less than about 60% of the rated capacity, and the battery cannot be significantly increased after maintenance, it can be determined to be scrapped. This is due to the fact that the performance of the battery will be greatly attenuated after the capacity decays to about 60% during the use of the battery, and all components have basically reached a deteriorating condition. This attenuation has a tendency to gradually accelerate, and the charging and discharging ability will soon be completely lost. 2. Whether the battery is charging or discharging, its casing is seriously hot. The cause of heat generation is that the active material on the electrode plate has seriously fallen off, and irreversible lead sulfate crystallization has occurred, which increases the internal resistance and heat generation. At this time, if you open the battery safety valve to check, you will see that the electrolyte is black, and it cannot be repaired if it is seriously invalid. At this time, the battery self-discharges quickly, and sometimes it runs out soon after charging. In severe cases, the battery will bulge, and even the battery casing and wiring will burn. 3. Charge it for tens of minutes and it will be fully charged. After less than a few hours of riding, the battery will be replaced. At this time, the battery should be replaced, and the charger, controller, and circuit should be fully tested before selecting the battery to ensure the old original. Play a protective role for the new battery. When choosing a battery, try to choose a high-quality brand battery. 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: How to properly maintain the battery of an electric car?