Classification of safety testing items for lithium batteries

Published on:

2023-04-23 11:42

In order to ensure the safety of lithium-ion batteries, domestic and foreign organizations have developed various safety testing standards for lithium-ion batteries. General testing standards generally classify safety testing items into the following four categories:
1. Electrical testing: overcharging, over discharge, external short circuit, forced discharge, etc.
2. Mechanical testing: squeezing, needling, impact, vibration, drop, etc.
3. Thermal testing: High and low temperature cycling, combustion, microwave heating, etc.
4. Environmental simulation: high-altitude low-pressure simulation, salt spray test, etc.
Professional battery testing machines are required for squeezing, puncturing, impact, vibration, falling, burning, and high-altitude and low-pressure testing. In order to ensure the safety performance of the battery, identify unqualified batteries, and avoid battery safety accidents.
The overcharging test of lithium batteries is to fully charge the lithium battery and conduct an overcharging test according to 3C overcharging. When the battery overcharges, the voltage rises to a certain level and stabilizes for a period of time, and when it approaches a certain level, the battery voltage quickly rises. When it reaches a certain limit, the battery cap is pulled off, and the voltage drops to 0V. The battery has no future explosion.
Overall, power lithium batteries have higher requirements for product quality and safety, product consistency, and subsequent maintenance costs. Their product quality needs to be better guaranteed, so the detection of lithium batteries is particularly important.