Battery Pack Reinforcing Members for Stacking Stability
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Solution Overview
Problem
Existing battery packs face instability when external forces are applied along the stacking direction, leading to potential tilting of battery cells due to chain reactions.
Innovation Solution
A battery pack design incorporating first and second connecting members, and first and second reinforcing members, where the reinforcing members are fixed at specific points and oriented in opposite directions to counteract external forces, preventing tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If battery cells are stacked and fixed by tie bars or bands, then the battery cells are suppressed from being deformed by expansion, but when external force is applied along the stacking direction, the battery cells may tilt in a chain reaction
Solution Approach 1:
The invention introduces reinforcing members that extend in a direction perpendicular to the stacking direction of battery cells (horizontal dimension) to counteract external forces applied along the stacking direction (vertical dimension). This dimensional approach transforms the problem by adding structural support from a different orientation, preventing chain reaction tilting through opposing force vectors.
Solution Approach 2:
The reinforcing members are positioned and oriented to generate counteracting forces against external loads applied to the battery cell stack. By strategically placing these members, the structure creates balancing forces that prevent the chain reaction tilting effect, effectively using counterweight principles to maintain stability under external force.
2Reliability
If reinforcing members are added to counteract external forces, then tilting is prevented, but the device complexity increases
Solution Approach 1:
The invention combines multiple functions into integrated structural members that simultaneously serve as connecting elements and reinforcing elements. By merging the roles of connection and reinforcement into unified components, the design reduces the total number of separate parts needed while maintaining the counteracting force capability.
Solution Approach 2:
The connecting members and reinforcing members are designed to perform multiple functions: structural connection, force distribution, and tilting prevention. This multi-functionality reduces the need for specialized components, thereby simplifying the overall device complexity while achieving reliable resistance to external forces.
Data Source
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AI summary
A battery pack (1) comprising: a module stack body (20) having a plurality of stacked battery modules (2); first and second connecting members (41, 42) each provided on the same surface of the module stack body (20) in order to hold the stacked battery modules (2) and extending in the stacking direction of the battery modules (2); a first reinforcing member (51) fixed to the first and second connecting members (41, 42) at first and second fixed points; and a second reinforcing member (52) fixed to the first and second connecting members (41, 42) at third and fourth fixed points. Orientation of the components (Va, Vb) along the stacking direction of the battery modules (2) of vectors (VA, VB) having respectively the first and third fixed points as a start point and the second and fourth fixed points as an end point are opposed to each other.