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Forced internal short circuit

Partial certification program

Forced internal short circuit test requirements

CB certification

a. The battery is fully charged according to the charging procedure specified by the manufacturer;

b. Disassemble the battery to place a small nickel plate; (disassemble the unit cell under the environment of temperature 20 °C ± 5 °C and dew point below -25 °C;
    b. Disassemble the battery to place a small nickel plate; (disassemble the unit cell under the environment of temperature 20 °C ± 5 °C and dew point below -25 °C;
   d. Pressure step. (The pressure application step is required to be completed within 10 minutes, and it is required to apply pressure to the portion where the small battery is placed with a small nickel piece at a speed of 0.1 mm/s, and the voltage table is used to monitor the change of the voltage at the output end of the single battery, when it is observed that it is greater than When the voltage drops 50mV, or when the applied pressure reaches the required level (800N cylindrical battery, 400N square battery, and the square and cylindrical extrusion methods are slightly different), stop reducing the pressing tool for 30s, then remove pressure.)
    The result: no fire. If there is no fire, record the pressure at the internal short circuit.


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