Traction Battery Pack Sealing Blanket for Gas and Heat Containment
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Solution Overview
Problem
Existing electrified vehicle traction battery packs face challenges in effectively sealing interfaces to prevent gas exchange and maintain structural integrity during thermal events, which can compromise the enclosure's performance and safety.
Innovation Solution
A protective blanket with a sealing portion is integrated between enclosure sections, compressed by mechanical fasteners, and optionally enhanced with a multi-layered structure and sealant to seal gas exchange and insulate against thermal energy, maintaining enclosure integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing methods are used at enclosure interfaces, then assembly simplicity is maintained, but sealing performance and thermal insulation are insufficient
Solution Approach 1:
The patent combines the sealing function and thermal insulation function into a single integrated protective blanket component. This blanket is positioned between the first and second enclosure sections and includes a sealing portion that extends between peripheral flanges, thereby achieving both sealing and insulation without requiring separate components.
Solution Approach 2:
The protective blanket employs a multi-layer composite structure comprising a first thermally insulating layer, a second thermally insulating layer, and a third layer (metallic or additional insulating) sandwiched between them. This composite construction provides both effective sealing and superior thermal insulation performance.
2Object-affected harmful factors
If the enclosure is sealed to prevent gas exchange, then safety during thermal events is improved, but structural complexity increases
Solution Approach 1:
The sealing function is integrated into the protective blanket itself through the sealing portion that extends between the peripheral flanges of the enclosure sections. This eliminates the need for separate sealing components while effectively preventing gas exchange between the interior area and ambient environment.
3Temperature
If thermal insulation is enhanced at enclosure interfaces, then protection during thermal events is improved, but manufacturing complexity increases
Solution Approach 1:
The protective blanket utilizes a multi-layer composite structure with first and second thermally insulating layers and a third layer (metallic or additional insulating) sandwiched between them. This composite design provides enhanced thermal insulation while maintaining manufacturability through integrated construction.
Solution Approach 2:
The thermal insulation function is merged with the sealing function in the protective blanket, eliminating the need for separate insulation components and simplifying the manufacturing process while achieving superior thermal protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the sealing performance and thermal insulation of battery packs, preventing gas and thermal energy leakage during thermal events, thereby ensuring the structural integrity and safety of the enclosure.
Implementation Method 1
The sealing portion is compressed by one or more mechanical fasteners for sealing a gas exchange between an interior area of the enclosure assembly and an ambient environment outside of the enclosure assembly
Implementation Method 2
The sealing portion includes a first thermally insulating layer, a second thermally insulating layer, and a third layer sandwiched between the first thermally insulating layer and the second thermally insulating layer
Data Source
AI summary
Systems and methods are provided for sealing interfaces of a traction battery pack. An enclosure assembly of the traction battery pack may include a protective blanket configured for insulating portions of the enclosure assembly. A sealing portion of the protective blanket may be arranged to seal an interface between a first enclosure section and a second enclosure section of the enclosure assembly. The sealing portion may be compressed by one or more mechanical fasteners for sealing a gas exchange between an interior area of the enclosure assembly and an ambient environment outside of the enclosure assembly.