24/5000 Battery Forced Discharge Testing Laboratory, Here We Interpret the Requirements of Forced Discharge Testing

Test

Electrical safety tests: Charging test Discharge test Continuous charging test Abnormal charging test Overcharge test Forced discharge test Overcharge test Overdischarge test Overvoltage charging test Overcurrent charging test Unbalanced charging Undervoltage discharge test Reverse charging test Electrostatic discharge test Power limit test Input power test Output port overload Wrong installation test External short circuit test Forced internal short circuit

Environmental safety tests: Temperature and humidity cycle test Mold stress relief High altitude low voltage simulation Impact test Vibration test Heavy impact test Squeeze test Thermal shock test Drop test Combustion test Temperature rise test Flame retardant test 250N steady force test High temperature test Washing test

Protect circuit safety tests: Overvoltage charging protection Overcurrent charging protection Undervoltage discharge protection Short circuit protection test Overload protection test Over temperature protection test High pressure test

Other performance tests: Capacity test Cycle life test Vacuum glove box

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Forced discharge test

Partial certification program	Forced discharge test requirements
UN38.3 certification	At a temperature of 20 ± 5 ° C, a single cell is connected to a 12 V DC power source for forced discharge. This DC power supply provides the initial current for each cell to the maximum discharge current specified by the manufacturer. The specified discharge current is obtained by a load of suitable size and power connected in series on the test cell, and the forced discharge time (hours) of each cell is the rated capacity divided by the initial current (amperes). RESULTS: There should be no disintegration and no fire during the test and within 7 days after the test.
UL certification	This test is suitable for applications with multi-cell combination applications, such as battery packs. A fully discharged cell is forced to be connected in series with a new cell, the number of new cells in series = the maximum number of series applications - 1. 5 cells are tested after being fully discharged at room temperature. When the fully discharged cells are connected in series with a specific number of new cells, the formed battery pack is subjected to a short circuit test. The positive and negative terminals are connected to Cu with a resistance of less than 0.1 Ω, and the battery is discharged until it catches fire or explodes, or the test is terminated until the temperature of the battery case falls back to near room temperature. Result: No fire, no explosion.
CQC Certification	After the battery was discharged according to the discharge procedure specified by the manufacturer, it was reversely charged with 1CA current for 90 min. Result: No fire, no explosion.
CBC ertification	After the battery was discharged according to the discharge procedure specified by the manufacturer, it was reversely charged with 1CA current for 90 min. Result: No fire, no explosion.

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