Lithium battery thermal runaway eruption substance burning explosion characteristic in-situ testing device and testing method thereof

The invention discloses a lithium battery thermal runaway eruption fire blast characteristic in-situ test device, which comprises a thermal runaway cabin and an explosion cabin, the thermal runaway cabin and the explosion cabin are connected through a gas distribution channel, and battery thermal runaway eruptions generated in the thermal runaway cabin are conveyed to the explosion cabin through the gas distribution channel. Through cooperation of the thermal runaway cabin, the explosion cabin and the gas distribution channel, thermal runaway of the battery can be triggered in multiple modes, and in-situ testing of the real burning and explosion characteristics, including the explosion limit, the explosion pressure, the explosion index, the limit oxygen concentration, the minimum ignition energy and the like, of a multi-phase multi-component battery eruption is achieved; the traditional off-line testing method is broken through for the first time, and the measured data has more guiding value for the applicati