In order to ensure the safety, stability and reliability of the lithium-ion battery, a very strict and thorough lithium-ion battery will be specially designed for the safety performance of the lithium-ion battery, so as to achieve the safety evaluation index of the lithium-ion battery. The safety of lithium-ion batteries is also one of the most important issues.
1) Automatically close diaphragm protection at 135°C
International advanced PE-PP-PE three-layer composite film. When the temperature of the lithium-ion battery reaches 120 °C, the membrane pores on both sides of the PE composite film are closed, the internal resistance of the lithium-ion battery increases, and the internal temperature of the lithium-ion battery decreases. When the temperature of the lithium-ion battery reaches 135°C, the pores of the PP film are closed, the internal circuit of the lithium-ion battery is disconnected, and the lithium-ion battery no longer heats up, ensuring the safety and reliability of the lithium-ion battery.
2) Add additives to the electrolyte
Under the condition that the lithium-ion battery is charged, the voltage of the lithium-ion battery is greater than 4.2v, the electrolyte additive and other substances are polymerized electrolyte, the internal resistance of the lithium-ion battery is greatly increased, and a large-area circuit breaker is formed in the lithium-ion battery, lithium-ion The battery temperature is no longer added.
3) Lithium-ion battery shell composite structure
The Li-ion battery cover adopts a notched explosion-proof ball structure. When the lithium-ion battery heats up, part of the gas that occurs during the internal activation of the lithium-ion battery expands, and the internal pressure of the lithium-ion battery increases. The pressure reaches a certain level of notch rupture and venting.
4) Various environmental damage tests
Carry out various abuse experiments such as external short circuit, overcharge, acupuncture, electric shock, incineration, etc., to investigate the safety performance of lithium-ion batteries. Temperature shock test and vibration of lithium-ion battery pack, drop, effect, such as mechanical properties experiment, medical equipment, industrial mobile lighting lithium-ion battery, lithium-ion battery special hand drum lithium-ion battery, lithium-ion battery electric bicycle lithium-ion battery, power tools , notebook computers, industrial equipment lithium-ion batteries, lithium-ion batteries of various lithium-ion batteries and lithium-ion battery products, products are exported to Europe, America, the Middle East, Southeast Asia and other markets.