Dongguan Neide technology

The testing procedure should be executed at an ambient temperature within the range of 20 ℃ ± 5 ℃. A fully - charged battery is to be placed between two flat plates. An extrusion pressure of 13KN ± 0.78KN is applied perpendicular to the plates, either for extrusion or pinprick tests on the battery. Once the maximum pressure value is reached, the extrusion test can be halted. The test is considered qualified if the battery does not experience an external short - circuit during the test, and the battery under test does not explode or catch fire.

Specific Guidelines for Different Battery Types

Cylindrical Cells: During the extrusion process of cylindrical cells, the longitudinal axis of the cell being extruded must be parallel to the two flat plates of the extrusion device. This ensures that the pressure is evenly distributed along the length of the cell, accurately simulating real - world stress scenarios.
Square and Soft - pack Cells: For square and soft - pack cells, only the wide side of the cell is subjected to the extrusion test. This is because the wide side is often the area most vulnerable to external pressure in practical applications, and testing this side can effectively evaluate the cell's resistance to such forces.
Coin - type or Button - type Batteries: In the case of coin - type or button - type batteries, the extrusion test is conducted using two parallel plates placed above and below the battery. This setup enables a uniform application of pressure across the entire surface of the battery, providing a comprehensive assessment of its structural integrity under pressure.