How to distinguish between good and bad electric vehicle batteries

1. During the trial operation of the electric vehicle, check the quality of the battery, install the battery that has just been fully charged on the electric vehicle, start the electric vehicle power supply, and suddenly accelerate the electric vehicle during driving, and observe the change of the electricity meter pointer: (1 ) If the pointer of the charge gauge drops less than half a block during acceleration, it is judged that the battery is brand new or has good performance; (2) The pointer of the charge gauge drops 1 block or even 2 during acceleration cycling. If the battery is broken, it is judged that the battery is old or of poor quality; (3) When the pointer of the fuel gauge drops 3 or even 4 bars during acceleration, it is judged that the battery is a fake new one after being repaired by a scrapped battery. The quality of battery products is extremely poor. 2. Judge whether the battery is old or new through the external packaging of the battery: (1) Check whether the external packaging is damaged or disassembled; (2) Check the appearance of the battery itself, and observe whether there are scratch marks and positive and negative terminals. Whether the location is rusty; (3) Check whether there is an anti-counterfeiting label on the battery shell, whether the processing date is relatively old, whether the manufacturer's relevant information signs are complete, and whether the writing is clear and complete. If there is 1 point or more in the external packaging of the battery, it is considered that the battery is an old battery, and the quality may be problematic. 3. Look at the old and new battery: In fact, this is a good judgment. Generally, you can judge whether there are scratches or scratches by looking at the appearance, and then see whether there is rust on the positive and negative metal parts of the battery. 4. Use a professional voltage measurement tool to determine whether the battery has an internal short circuit (bad battery): After riding for a while or after being charged, the vehicle is left standing for several hours, and the voltage is measured at the charging plug, and it is 48 volts. Or a higher point is a normal battery (no distinction between old and new). If it can only reach 46 volts or below, it means that there is a short circuit in one battery (the 48 volt car has four groups of batteries, and each group is connected to 12 volts by 6 2 volt batteries), and it shows that this group of 10 volts is a bad battery. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What kinds of matters are involved in the production of lithium battery PACK?