Battery protection system and vehicle

Abstract

The embodiment of the invention provides a battery protection system and a vehicle. The battery protection system comprises a first pipeline loaded with cooling liquid, a fluid driving assembly and a heat conduction assembly which are arranged on the first pipeline, a second pipeline, and a first spray head and a second spray head which are arranged on the second pipeline, wherein the first pipeline is connected with a battery assembly; the second pipeline is used for transferring a refrigerant medium; the first spray head is opposite to the battery assembly, and the second spray head is opposite to the heat conduction assembly; when what is determined is that the battery assembly meets the preset thermal runaway condition, the first spray head is used for spraying a refrigerant medium to the battery assembly; the fluid driving assembly is used for driving the cooling liquid to circularly flow in the first pipeline; and the second spray head is used for spraying refrigerant medium to the heat conduction assembly. According to the embodiment of the invention, the temperature of the thermal runaway battery assembly can be rapidly reduced, and risks caused by thermal runaway of the battery assembly are reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery protection system and a vehicle. Background technique [0002] The safety of pure electric vehicles has always attracted much attention, and the safety issues such as fire, explosion and collision of power batteries on pure electric vehicles have always been the most concerned issues of consumers. Safety issues such as fire and combustion of the power battery are closely related to its own thermal runaway, for example: lithium dendrites inside the battery cause a short circuit between the positive and negative electrodes; Short circuit leads to problems such as excessive heat accumulation inside the battery, which can easily cause thermal runaway of the battery cell. Once the thermal runaway of the battery cell occurs, the energy generated by the possible fire or explosion will easily lead to the expansion of the thermal runaway, causing thermal runaway of the surrou...

AI Technical Summary

Problems solved by technology

In some processing methods, some are specially designed air-cooling system or liquid cooling system inside the battery pack, which is relatively complicated; some are emergency cut-off of the high-voltage relay of the battery, and the fuse inside the battery pack is disconnected to prevent the impact of high current. Finally, the air-conditioning cooling system cannot be used, and the thermal management and cooling of the battery cells cannot be performed; some use electronic fans to cool the water temperature of the battery circuit after high-voltage power-off, but the power of the fans is large, and the battery is prone to power loss, and the fans cannot Continuous work, unable to continuously dissipate heat

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