Multi-parameter lithium ion battery safety assessment device and method

The invention discloses a multi-parameter lithium ion battery safety assessment device and method, the device comprises a battery thermal runaway experiment module, a gas analysis system and a gas sampling pipeline, and the battery thermal runaway experiment module is connected with the gas analysis system through the gas sampling pipeline; the battery thermal runaway experiment module comprises a module body, a heating module, a pressure control module and a temperature detection module, the heating module is used for heating a battery and triggering thermal runaway, the pressure control module is used for monitoring and controlling the pressure in the module body, and the temperature detection module is used for recording the temperature of the surface of the battery to be detected and the temperature of exhaust gas of the battery to be detected in real time; and the gas analysis system comprises a gas chromatograph-mass spectrometer and a gas Raman spectrum detector. The environment pressure and the enviro