How is the lithium ion safety feature achieved

1) The 135°C automatic shut-off protection of the diaphragm adopts the international advanced Celgars 2300PE-PP-PE three-layer composite film. When the temperature rises to 120 °C, the membrane pores on both sides of the PE composite membrane are closed, the internal resistance of the battery is increased, and the internal temperature rise of the battery is slowed down. When the temperature rises to 135 °C, the PP membrane hole is closed, the battery is internally broken, and the battery is no longer used. Warm up to ensure the battery is safe and reliable.

2) Adding an additive to the electrolyte When the battery is overcharged and the battery voltage is higher than 4.2V, the electrolyte additive is polymerized with other substances in the electrolyte, the internal resistance of the battery is greatly increased, and a large area of the battery is broken inside, and the battery is not Warm up again.

3) Battery cover composite structure The battery cover adopts the scoring explosion-proof ball structure. When the battery is warmed up, part of the gas generated during the activation process of the battery expands, the internal pressure of the battery increases, and the pressure reaches a certain degree of cracking and deflation.

4) Various environmental abuse tests for various abuse experiments, such as external short circuit, overcharge, acupuncture, impact, incineration, etc., to examine the battery safety performance. At the same time, the battery was subjected to temperature shock test and mechanical properties such as vibration, drop and impact, and the performance of the battery in the actual use environment was investigated.