What are the requirements for safety testing indicators for lithium batteries?

What is the safety test index for lithium batteries? After a lithium battery is processed, it must go through a series of tests before it reaches the customer to ensure the safety of the battery and reduce potential safety risks. 1. Kneading inspection: Place the fully charged battery on a flat surface, and apply a kneading force of 13±1KN from the cylinder. Knead the battery from a flat steel bar with a diameter of 32mm. 2. Impact inspection: After the battery is fully charged, place the steel column on the plane with a diameter of 15.8 mm, and place the battery at the center of the steel column with a diameter of 15.8 mm, and place the battery with a weight of 9.1 kg from a steel column with a height of 610 mm. The battery will not catch fire or burst. 3. Overload test: The battery is fully charged at 1c, and 10v is carried out according to the 3c overload simulation experiment. When the voltage of the battery charging voltage must be stable for a period of time, the battery voltage near the moment will rise quickly to a certain limit, and the top hat of the battery , The voltage drops to 0v, the battery does not fire and bursts. 4. Short-circuit check: In a complete battery, use a wire with a resistance of no more than 50m. The battery is a negative short-circuit, check the surface temperature of the battery, the maximum surface temperature of the battery is 140℃, the battery block, and the battery have no fire and no explosion. 5. Acupuncture inspection: Place the fully charged battery on a flat surface, and puncture the battery radially with a steel needle with a diameter of 3mm. Check whether the battery is on fire and whether there is an explosion in the battery. 6. Temperature cycle test: Pass the temperature cycle test of lithium battery to simulate the safety of lithium battery repeatedly exposed to low temperature environment during transportation or storage. The test was carried out by the agile temperature method and the extreme temperature method. After the test, the sample should not catch fire, explode, or leak. 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 long is the life of lithium batteries in general?