Battery upper box body assembly capable of delaying thermal runaway and battery assembly

Abstract

The invention relates to the technical field of thermal runaway of batteries, and discloses a battery upper box assembly capable of delaying thermal runaway and a battery assembly. The battery upper box assembly capable of delaying thermal runaway comprises an upper box body and an explosion-proof valve, a containing cavity and a gas channel which are isolated are defined in the upper box body, cooling liquid is arranged in the containing cavity, the gas channel is located below the containing cavity, and the upper box body is configured in the mode that when thermal runaway happens to a battery monomer, the wall face between the containing cavity and the gas channel can be broken to enable the containing cavity to be communicated with the gas channel, a gas inlet communicated with the gas channel is formed in the upper box body, the first circulation area of the gas inlet is larger than the second circulation area of an outlet of the gas channel, and the anti-explosion valve is arranged on the upper box body. And the explosion-proof valve is configured to enable the gas to rush out of the explosion-proof valve when the pressure of the gas at the outlet of the gas channel is higher than preset pressure. The battery upper box assembly capable of delaying thermal runaway disclosed by the invention has the function of delaying thermal runaway of the battery monomer.

Description

technical field [0001] The invention relates to the technical field of thermal runaway of batteries, in particular to a battery upper box assembly and a battery assembly capable of delaying thermal runaway. Background technique [0002] The existing battery cells all use high-energy, high-power lithium batteries, which are prone to thermal runaway of the battery, but the existing battery upper box assembly does not have the function of delaying thermal runaway, so an additional independent thermal runaway protection system is required , increasing the production cost of the battery assembly. Contents of the invention [0003] Based on the above, the purpose of the present invention is to provide a battery upper case assembly capable of delaying thermal runaway, which has the function of delaying thermal runaway of battery cells. [0004] The present invention also provides a battery assembly, which does not require an additional independent thermal runaway protection syst...

AI Technical Summary

Problems solved by technology

[0002] The existing battery cells all use high-energy, high-power lithium batteries, which are prone to thermal runaway of the battery, but the existing battery upper box assembly does not have the function of delaying thermal runaway, so an additional independent thermal runaway protection system is required , increasing the production cost of the battery assembly

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