Power battery, thermal diffusion protection method of power battery and vehicle

Abstract

The invention relates to the technical field of vehicles, and discloses a power battery, a thermal diffusion protection method of the power battery and a vehicle. The power battery comprises a shell and a module assembly arranged in the shell, the shell comprises an upper cover and a bottom plate which are buckled with each other, the module assembly comprises a plurality of modules which are electrically connected with each other, an explosion-proof valve is arranged on the upper cover or the bottom plate, the power battery further comprises a fireproof assembly, an exhaust passage and an insulating assembly, and the fireproof assembly is arranged between the module assembly and the upper cover; an exhaust passage communicated with the explosion-proof valve is formed between the edge of the module assembly and the inner side wall of the shell; the insulating assembly is arranged between two adjacent modules. The fireproof assembly can be used for preventing gas from breaking through the upper cover during thermal runaway; the exhaust assembly is used for guiding the gas, so that the gas flows out of the power battery through the exhaust assembly and the explosion-proof valve; meanwhile, the insulating assembly arranged between the two adjacent modules can effectively improve chain reactions such as high-voltage short circuit and the like in the module assembly when the power battery is in thermal runaway.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a power battery, a thermal diffusion protection method for the power battery and a vehicle. Background technique [0002] As the core component of electric vehicles, the safety of power batteries is crucial to the safety of electric vehicles. [0003] In the prior art, when the internal module of the power battery is thermally out of control, the gas inside the power battery will accumulate and flow irregularly inside the power battery. When the gas accumulates too much, it will break through the casing and cause danger. [0004] Therefore, there is an urgent need for a power battery to solve the above problems. Contents of the invention [0005] Based on the above, the object of the present invention is to provide a power battery, a thermal diffusion protection method for the power battery and a vehicle, which have higher safety when thermal runaway occurs. [0006] For rea...

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Problems solved by technology

[0003] In the prior art, when the thermal runaway of the internal module of the power battery occurs, the gas inside the power battery will accumulate and flow irregularly inside the power battery. When the gas accumulates too much, it will break through the casing and cause danger.

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