How to check the safety of Lead Acid replacements?
The security test for Lead Acid replacements mainly includes the following aspects: it is necessary to pass security tests such as overcharge, short circuit, acupuncture, kneading, and heavy object impact, and the battery can not catch fire or explode. The following are the detailed methods:
1, overcharge test
Fully charge the Lead Acid replacement, and conduct an overcharge test according to 3C overcharge. When the battery is overcharged, the voltage rises to a certain voltage and stabilizes for a period of time. When approaching a certain time, the battery voltage rises rapidly. When it rises to a certain limit, the battery caps. Pull off, the voltage drops to 0V, and the battery does not catch fire or explode.
2, short circuit test
After the battery is fully charged, short-circuit the positive and negative electrodes of the battery with wires with a resistance of not more than 50mΩ, test the surface temperature of the battery to change, the high temperature of the battery surface is 140 ℃, pull the battery cap off, and the battery will not catch fire or explode; acupuncture test: Place the fully charged battery on a flat surface and pierce the battery radially with a 3mm diameter steel needle. Test that the battery does not catch fire or explode; kneading test: place a fully charged battery on a flat surface, apply a kneading force of 13+1KN by a hydraulic cylinder, and knead the battery flat with a steel rod with a diameter of 32mm. , once the kneading pressure reaches the maximum stop kneading, the battery will not catch fire or burst.
3, heavy object impact test
After the battery is fully charged, place it on a flat surface, place a steel column with a diameter of 15.8mm vertically in the center of the battery, and freely drop a weight of 9.1kg onto the steel column above the battery from a height of 610mm, the battery will not catch fire, Just don't explode.