Battery Stack Plate Design for Impact Protection
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Solution Overview
Problem
Conventional battery stacks are prone to deformation, ignition, or explosion due to direct collision with the container's inner wall when subjected to impacts or vibrations, as the battery cells are not adequately protected from external forces.
Innovation Solution
A battery stack design where laminar battery cells are alternately stacked with plates, with each cell fixed to an adjacent plate, and the plates have cut-outs to allow electrode tabs to connect between cells, ensuring the cells are securely positioned within a contouring rectangle that prevents direct collision with the container's walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If battery cells are stacked directly in the container without additional protective structures, then the device complexity is reduced, but the reliability deteriorates due to direct collision with container walls during impact or vibration
Solution Approach 1:
A plate is introduced as an intermediary component between the battery cell and the container wall. The plate serves as a mediator that absorbs and distributes external forces, preventing direct contact between the battery cell and the container wall during impact or vibration, thereby improving safety without significantly increasing structural complexity
Solution Approach 2:
The plate is positioned in advance around the battery cell to provide protective cushioning before any impact occurs. This pre-positioned protective structure ensures that when external forces are applied, the battery cell is already shielded, preventing direct collision with the container wall
2Reliability
If battery cells are fixed securely to prevent movement, then the reliability improves by preventing collision, but the device complexity increases due to additional fixing mechanisms
Solution Approach 1:
The protective function and the fixing function are merged into a single plate component. The plate simultaneously provides protection against external forces and secures the battery cell in position, eliminating the need for separate fixing mechanisms and thereby improving reliability without significantly increasing structural complexity
Solution Approach 2:
The plate is designed as a multi-functional component that performs multiple roles: it acts as a protective barrier against container wall collision, serves as a fixing element to secure the battery cell, and provides structural support. This universal component approach improves safety while minimizing the increase in device complexity
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A plurality of laminar battery cells and a plurality of plates are alternately disposed and stacked one on top of another. Each battery cell is fixed to an adjacent plate. A rectangle with a minimum area internally including the plate also internally includes the battery cell having a positive electrode tab and a negative electrode tab that are drawn out from the battery cell, when the battery stack is viewed in a stacked direction.