Battery pack flue gas flow channel system and battery pack

A battery pack and flue gas flow technology, applied in the field of battery packs
CN110459719APending Publication Date: 2019-11-15TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2019-11-15

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Abstract

The invention relates to a battery pack flue gas flow channel system and a battery pack. The battery pack flue gas flow channel system comprises a plurality of branch pipelines, a main pipeline and acooling device, wherein the plurality of branch pipelines are respectively communicated with the main pipeline to form a combustible mixed gas dredging channel. The combustible mixed gas dredging channel dredges a combustible mixed gas generated by the single batteries during thermal runaway to the outside of the battery pack, so that the accumulation of the combustible mixed gas in the battery pack is reduced, and thus the explosion and combustion probability of the battery pack is reduced. Furthermore, the cooling device is arranged at an exhaust port of the main pipeline, thereby reducing the temperature of the combustible mixed gas at the exhaust port of the main pipeline, and effectively avoiding the gas explosion at the exhaust port of the main pipeline. Therefore, the battery pack flue gas flow channel system reduces the explosion and combustion probability of the battery pack and improves the safety of the battery pack.
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Description

technical field

[0001] The present application relates to the technical field of battery packs, in particular to a battery pack smoke flow channel system and a battery pack. Background technique

[0002] During the thermal runaway process of the battery pack, a large amount of flammable gaseous mixtures are generated, such as flammable electrolyte vapor, hydrogen, carbon monoxide, methane, ethylene and other gaseous substances. These combustible mixtures gradually accumulate inside the battery pack during the thermal runaway process, and cause the internal pressure of the battery pack to gradually increase until a preset pressure threshold is reached, the safety valve of the battery pack is opened, and the combustible mixture is discharged to the external environment.

[0003] During the eruption of the battery pack, the temperature of the battery pack can reach a maximum of about 1000°C, and the eruption is often accompanied by sparks. Due to the high temperature of the b...

Claims

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