From the perspective of UL9540A test, the safety performance analysis of new energy batteries mainly includes the following aspects:
· Thermal runaway risk: UL9540A test the main concern is the risk of thermal runaway of new energy batteries. During the test, the flexible film heater is used to induce the thermal runaway of the cell, and the temperature is measured throughout the whole process, and the temperature at the time of exhaust and the starting temperature of thermal runaway are recorded. By analyzing these data, the thermal runaway reaction and possible risks of the cell can be judged.
· Gas composition and safety: UL9540A test the composition of the gas released by the cell is also analyzed. Through the measurement of the gas composition, the thermal runaway nature and safety of the cell can be judged. For example, if the released gas contains a large amount of flammable gas, then the cell has a greater safety hazard.
· Explosion limit and explosion pressure: the UL9540A test can also measure the explosion limit and explosion pressure of the gas by collecting the gas released by the cell. These parameters can be used to evaluate the safety performance of the cell under specific conditions. If the explosion limit is low or the explosion pressure is high, it indicates that the cell is prone to explosion or combustion under certain conditions, and the safety is poor.
· Burning rate: UL9540A test the burning rate of the gas released by the cell can also be measured. The faster the burning rate, the faster the burning speed of the battery core, and the worse the safety.
Through the analysis of the above aspects, the safety performance of new energy batteries can be comprehensively evaluated. These data can not only be used to guide the development and improvement of batteries, but also to formulate relevant safety standards and regulations.
It should be noted that, UL9540A test it is only a method to evaluate the safety performance of new energy batteries, and the results do not fully represent the safety performance of batteries. Therefore, in practical applications, it is also necessary to combine other test methods and standards to conduct a comprehensive safety performance evaluation of the battery.
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