Integrated Battery Module Cover for Gas Leakage Prevention
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Solution Overview
Problem
Existing battery modules face challenges in efficiently managing gas generated by electrochemical reactions in high-output battery cells, leading to potential leakage and damage to adjacent cells or modules.
Innovation Solution
A battery module cover with an integrated degassing cover and bus bar cover, featuring a T-shaped exhaust part and multiple ribs for enhanced sealing and gas discharge, reduces gas leakage by creating a directed path for gas to safely exit through outside discharge holes, while the integrated design minimizes components and improves assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate degassing cover and bus bar cover are used, then each component can be optimized independently, but the number of components increases and assembly complexity increases
Solution Approach 1:
The patent combines the degassing cover and bus bar cover into a single integrated cover component. The integrated cover includes a degassing cover portion with cavity and exhaust part for gas management, and a bus bar cover portion with bus bar insertion holes, all formed as one piece. This merging reduces the number of components and assembly steps while maintaining the sealing ability and functional performance of both covers.
2Reliability
If multiple separate components are used for gas management, then gas discharge paths can be optimized, but assembly time increases and productivity decreases
Solution Approach 1:
The degassing cover and bus bar cover are merged into a single integrated component that can be installed as one piece. The integrated cover includes the cavity structure for gas collection, exhaust part for gas discharge, and bus bar cover portions with insertion holes, all formed together. This reduces assembly steps and time while maintaining effective gas leakage prevention through the integrated cavity-exhaust structure.
3Reliability
If complex sealing structures are used to prevent gas leakage, then sealing ability improves, but manufacturing complexity increases
Solution Approach 1:
The integrated cover combines multiple functions (degassing, bus bar coverage, sealing) into a single component with a unified structure. The cavity and exhaust part are formed as integral features of the cover body, eliminating the need for separate sealing components or complex assembly procedures. This simplifies manufacturing while maintaining effective sealing ability through the integrated design.
4Reliability
If separate covers are used for different functions, then each function can be optimized, but the overall device size increases
Solution Approach 1:
The patent integrates the degassing cover and bus bar cover into a single compact component. The integrated cover includes the cavity structure for gas collection, exhaust part for discharge, and bus bar cover portions, all arranged in a space-efficient configuration. This merging reduces the overall volume compared to separate covers while maintaining gas discharge efficiency through the optimized cavity-exhaust pathway.
Data Source
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AI summary
A battery module including a plurality of battery cells arranged in a first direction from a first end of the battery module to a second end of the battery module, each of the battery cells including a case including a vent, an electrode assembly housed in the case, and a terminal electrically coupled to the electrode assembly; a bus bar coupled between the terminals of adjacent battery cells of the plurality of battery cells; and a battery module cover covering the plurality of battery cells and including a degassing cover covering the vents of the plurality of battery cells, and a bus bar cover covering the terminals of the plurality of battery cells and the bus bar.