Battery Module Bus Bar Structure for Easy Cell Disassembly
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Solution Overview
Problem
Conventional battery modules lack adequate consideration for disassembly, making it difficult to disconnect battery cells connected by bus bars during maintenance or repair.
Innovation Solution
The battery module design includes bus bars with a rising portion featuring a fragile portion at its root region, allowing easy disconnection by breaking this weak point, and a symmetrical structure to ensure efficient force transmission and balanced support, facilitating easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bus bars are used to electrically connect battery cells, then electrical connection is achieved, but disassembly workability deteriorates
Solution Approach 1:
The bus bar is segmented into a base portion and a rising portion, with the rising portion being detachable. This segmentation allows the bus bar to maintain electrical connection during operation while enabling easy disassembly by removing only the rising portion, thus resolving the contradiction between reliable connection and disassembly workability
Solution Approach 2:
The rising portion of the bus bar is extracted as a separate detachable component from the base portion. This extraction allows the rising portion to be removed during disassembly while the base portion remains connected to the battery cells, maintaining electrical connection reliability during operation but enabling easy disassembly when needed
2Ease of operation
If bus bar structure is simplified for easy disassembly, then disassembly workability improves, but connection strength deteriorates
Solution Approach 1:
Different parts of the bus bar have different properties: the base portion has high strength and rigidity to ensure reliable electrical connection, while the rising portion has a simpler structure that allows easy detachment. This local differentiation of quality resolves the contradiction between connection strength and disassembly workability
Data Source
AI summary
A battery module includes: a plurality of battery cells stacked in a predetermined direction; and a plurality of bus bars that electrically connect the plurality of battery cells together. The plurality of bus bars include a first bus bar extending between a first battery cell and a second battery cell of the plurality of battery cells, the first battery cell and the second battery cell being adjacent to each other in the predetermined direction. The first bus bar has a first base portion connected to the first battery cell, a second base portion connected to the second battery cell, and a rising portion that has a shape to rise from the first base portion and the second base portion and that connects between the first base portion and the second base portion. A fragile portion is provided in a root region of the rising portion.