Battery Module Compression Assembly for Swelling Pressure Retention
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Solution Overview
Problem
Conventional battery modules face inefficiencies in assembly processes, reduced lifespan due to pressure loss from swelling, and safety risks from fires in abnormal situations.
Innovation Solution
A battery module design featuring stacked battery cells with end plates and a fastening unit that press the cells, along with a buffer member and thermistor unit for temperature measurement, and mica sheets for fire suppression, improving assembly efficiency, lifespan, and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery cells are fixed by stacking a plurality of cartridges, then the battery cells can be assembled, but the assembly process efficiency is reduced
Solution Approach 1:
The patent merges multiple separate cartridge components into a single integrated cartridge structure that can accommodate multiple battery cells. This integration eliminates the need for stacking multiple separate cartridges, thereby improving assembly efficiency while reducing structural complexity. The unified cartridge design allows for simplified handling and assembly processes.
2Reliability
If battery cells are fixed by stacking cartridges, then the battery cells can be secured, but the lifespan performance deteriorates due to pressure loss from swelling
Solution Approach 1:
The patent incorporates a buffer member within the cartridge structure that provides pre-positioned cushioning between battery cells. This buffer member compensates for swelling of the battery cells over time, maintaining consistent pressure and preventing the pressure loss that would otherwise occur with conventional stacking structures. The cushioning effect is built into the design from the beginning, ensuring long-term reliability.
3Object-affected harmful factors
If conventional cartridge stacking is used, then battery cells can be assembled, but fire transition risk increases in abnormal situations
Solution Approach 1:
The patent introduces a buffer member as an intermediary element between adjacent battery cells within the cartridge. This buffer member acts as a physical barrier that prevents direct contact and heat transfer between cells, thereby suppressing fire transition in abnormal situations. The intermediary structure provides safety without requiring complex external safety systems.
Data Source
AI summary
A battery module includes battery cells stacked with each other, a pair of end plates provided at both ends of the battery cells in the stacking direction of the battery cells, and a fastening unit fastened to the pair of end plates along the stacking direction and configured to press the pair of end plates along the stacking direction.