Battery module, power battery pack and vehicle

Abstract

The invention relates to a battery module, a power battery pack and a vehicle. The battery module comprises a module end cover, a plurality of monomer batteries and a monomer protective cover, whereina plurality of gas exhaust holes are formed in the module end cover, the monomer exhaust holes and explosion-proof valves on the monomer batteries are oppositely arranged and are in one-to-one correspondence, a gas guide cylinder is formed on the monomer protective cover and comprises a cylinder body, a first port and a second port, the periphery of the first port surrounds the explosion-proof valve, the periphery of the second port surrounds the gas exhaust hole, and gas exhausted by the explosion-proof valve sequentially passes through the first port, the cylinder body and the second port and then reaches the gas exhaust hole. According to the invention, each monomer battery in the battery module is provided with an independent gas exhaust channel, so that heat diffusion can be avoided,thermal runaway cannot be transferred to other single batteries, and the gas exhaust path of the gas exhaust channel is shortened, so that gas cannot be retained in the battery module and can be quickly exhausted while other parts in the battery module cannot be damaged.

Description

technical field [0001] The present disclosure relates to the field of electric vehicles, and in particular, to a battery module, a power battery pack with the battery module, and a vehicle with the power battery pack. Background technique [0002] like Figure 1 to Figure 3 As shown, there are several single cells 20 and an exhaust pipe 100 in the battery module, and several single cells 20 share one exhaust pipe 100. , the explosion-proof valve 21 of the thermal runaway single battery 20 will be opened, and the high-temperature gas inside the single battery 20 can be discharged along the exhaust pipe 100 to release the internal pressure of the battery module. [0003] However, a plurality of single cells 20 sharing one exhaust channel 100 has the following disadvantages: first, as figure 2 As shown, since a plurality of single cells 100 share one exhaust duct 100, during the continuous exhaust process, the high-temperature gas continuously heats the single cells 20 on the...

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Problems solved by technology

[0003] However, a plurality of single cells 20 sharing one exhaust channel 100 has the following disadvantages: first, as figure 2 As shown, since a plurality of single cells 100 share one exhaust duct 100, during the continuous exhaust process, the high-temperature gas continuously heats the single cells 20 on the exhaust path, causing the temperature of other single cells to rise continuously, exacerbating the Thermal diffusion leads to thermal runaway of more single batteries; second, the exhaust path of the exhaust pipe 100 is too long, and it is not easy to avoid the wire harness in the battery module during the layout, and the high-temperature gas may burn other wire harnesses during the exhaust process Third, due to space constraints, the exhaust pipe 100 has a small exhaust aperture and a slow exhaust speed, and a large amount of gas generated by thermal runaway is too late to be discharged from the battery module, which easily leads to thermal runaway monomers The temperature of the battery cell rises rapidly, and the internal pressure of the battery module continues to increase, which may eventually cause the battery module to catch fire and explode

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