UL standard UL9540A accumulator battery pack array system connector .Ul9540A has 4 test levels, namely, core level, module level, unit level and installation level.
At the core level, it mainly depends on whether the core will lose control of heat, monitors the corresponding characteristics of heat loss and analyzes the components of the gas generated.
At the module level, we mainly focus on the tendency of runaway heat transmission, and monitor the release rate of heat and gas to investigate the risk of combustion and deflagration.
At the unit level, the fire spread is mainly evaluated, and the release rate of heat and gas is monitored to investigate the risk of combustion, deflagration and reburning. If the unit level test fails to meet the corresponding judgment conditions, the test shall be conducted again at the installation level.
When testing at the installation level, an assessment of the effectiveness of fire protection is added based on the corresponding unit level tests. When testing, you can use the automatic sprinkler on the ceiling, or you can use the fire protection design designed by the customer.