How to check the quality of lithium-ion batteries?
The quality of lithium-ion batteries is really difficult to distinguish by visual inspection alone, so multiple tests are needed to determine...
Lithium battery testing is a technical activity. Comprehensive testing of lithium batteries is carried out from the following aspects:
1. Whether the appearance is clean, whether there is rust, whether the coding is clear, and whether the casing is intact;
2. Detect lithium battery voltage, internal resistance, capacity, discharge platform, etc.;
3. Capacity test, cycle test, high and low temperature cycle, rate cycle, see the degree of curve overlap;
4. Test rate charge and discharge, test temperature rise, test dynamic pressure difference;
5. Store the batch at high temperature and normal temperature, and observe the static pressure difference;
6. Safety tests such as short circuit, puncture, impact, thermal shock, high and low temperature charge and discharge, etc.;
7. Anatomical analysis of the neatness of the winding core, pole piece length, number of pole ears, welding, thickness of auxiliary materials, etc.;
It is a complicated system engineering to comprehensively detect whether the lithium battery is good or bad, which requires professional technicians to cooperate with professional equipment.
