KEYWORDS: Lithium, Manganese, Resistance, Temperature metrology, Power supplies, Temperature sensors, Statistical analysis, Safety, Metals, Data processing
This paper mainly studies the thermal runaway phenomenon of lithium manganese disposable battery, triggers the thermal runaway of the product by heating, monitors the voltage and internal resistance state parameters of the product, and analyzes the performance changes of the cell. Understand the process of thermal runaway according to the temperature change of the cell and the pressure change inside the cavity of the thermal runaway device (accelerated calorimeter, ARC). Through the ideal gas state equation, the release equivalent amount of thermal runaway gas in the cell are analyzed. Through the thermal runaway test, explore the parameter state changes of lithium manganese battery under extreme conditions, and deepen the thermal safety research of lithium manganese battery.
KEYWORDS: Reliability, Analytical research, Safety, Temperature metrology, System on a chip, Statistical modeling, Power supplies, Metrology, Instrument modeling, Humidity
In view of the complicated testing process of high energy applications of lithium-ion traction battery packs for electric vehicles, based on current standards, the capacity and energy test programs under working conditions of 25℃, 45℃, and -20℃ were designed respectively, and tests were carried out according to the formulated programs. The test results show that under high temperature conditions, the discharge capacity and discharge energy of the battery pack are significantly reduced, and the loading of the thermal management system has a greater impact on the discharge capacity and discharge energy of the battery pack. The temperature rise during the discharge is related to the temperature of the working condition. The higher the temperature of the working condition, the lower the temperature rise during the discharge. The formulated high energy application lithium-ion traction battery pack capacity and energy test program can effectively complete the corresponding application test analysis, the program is simple to operate, and the results are accurate and effective.
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