How to Implement the Safety Characteristics of Lithium-ion Battery

How is the safety characteristic of the lithium-ion battery realized?

In order to ensure the safe and reliable use of lithium-ion batteries, experts have conducted a very strict and sophisticated battery safety design to meet the battery safety assessment targets.

(1) Automatic closure protection of diaphragm 135 °C

Using the international advanced Celgard2300PE-PP-PE three-layer composite membrane. When the battery heats up to 120 °C, the PE membrane holes on both sides of the composite membrane are closed, the internal resistance of the battery increases and the internal temperature of the battery slows down. When the battery heats up to 135 °C, the PP membrane holes are closed, the battery is cut off, and the battery is no longer heated. Ensure that the battery is safe and reliable.

(2) Adding Additives to Electrolytic Liquid

Under the condition that the battery is overcharged and the battery voltage is higher than 4.2 V, the Electro-hydraulic additives polymerized with other substances in the Electro-hydraulic fluid, the number of resistance pairs in the battery is increased, and a large area of disconnection is formed inside the battery, and the battery is no longer heated.

(3) The composite structure of battery cover

The battery cover adopts an indentation explosion-proof structure. When the battery heats up, part of the gas generated during the internal activation of the battery expands, the internal pressure of the battery increases, and the pressure reach a certain degree.

(4) Various environmental abuse tests

Conduct various abuse tests, such as external short circuit, overcharge, acupuncture, flat impact, incineration, etc., to investigate the safety performance of the battery. At the same time, the battery temperature impact test and vibration, drop, impact and other mechanical properties tests were carried out to investigate the performance of the battery in the actual operating environment.

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