A heating film system assembly for a battery pack

Abstract

The present invention relates to the technical field of battery packs for electric vehicles, in particular to a heating membrane system assembly for battery packs, which includes a PI heating membrane body and isolation foam, the PI heating membrane body includes a PI film and a resistance wire, and the PI heating membrane body includes a PI heating membrane body and a resistance wire. There are hollow holes on the film, and the hollow holes separate the PI film into at least two module layout areas, and the adjacent module layout areas are connected by the PI films on both sides of the hollow holes, and the resistance wire covers Inside the module layout area, the resistance wires between adjacent module layout areas are arranged in series, and the opening position of the hollow hole does not overlap with the layout area of ​​the resistance wire. The isolation foam is respectively arranged on the PI on both sides of the hollow hole. film. In this scheme, the electrical connection is more concise and reliable. At the same time, based on the flexibility of the PI film, it can be adaptively adjusted according to the surface characteristics of the contact surface at the installation position of the PI heating film body. It has strong versatility and greatly reduces the PI heating film system. The weight of the assembly is conducive to the lightweight design of the battery pack.

Description

technical field [0001] The invention relates to the technical field of battery packs for electric vehicles, in particular to a heating membrane system assembly for battery packs. Background technique [0002] At present, the design of lithium battery packs for electric vehicles pays more and more attention to high specific energy design. The same is true for thermal management system components. At present, the main method of thermal management system design is air cooling or liquid cooling; when heating at low temperature, the air-cooled battery pack generally adopts the integrated PTC to blow the internal heat circulation air to realize the heating function; liquid cooling is to heat the refrigerant liquid through the PTC in the front cabin Realize the heating function; for natural battery packs, it is generally necessary to adopt a heating film with a resistance wire to realize it. At present, the common heating film integration solutions include the integrated epoxy boa...

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Problems solved by technology

[0004] For this reason, it is necessary to provide a heating film system assembly for battery packs to solve the problems of heavy weight and high cost of use of the existing heating film assembly for battery packs

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