Battery Module Housing with Segmented Fastening for Impact Resistance
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Solution Overview
Problem
High-power battery modules are vulnerable to impact due to structural weaknesses, particularly when subjected to forces perpendicular to the ground, which can cause the battery cells to shift or become dislodged, leading to potential short circuits and safety hazards.
Innovation Solution
The battery module design incorporates a housing member with integrally formed side plates, bottom plates, and end plates that are fastened together with a top cover, using bolts-nuts or welding, to create a robust structure that maintains the cells' position during impacts, regardless of the impact direction. This design includes fastening portions and holes for secure attachment and provides a degassing portion for venting gases safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple housing structure is used for the battery module, then the manufacturing cost and device complexity are reduced, but the impact resistance and structural strength deteriorate
Solution Approach 1:
The housing is divided into multiple separate components (side plates, end plates, bottom plates, top cover) that are assembled together using fastening portions and fastening holes. This segmentation allows for easier manufacturing and assembly while maintaining structural integrity through the distributed fastening system.
Solution Approach 2:
Multiple housing components are combined through fastening portions and fastening holes to form an integrated structure. The side plates, end plates, bottom plates, and top cover work together as a unified housing system that provides enhanced impact resistance while maintaining manufacturing simplicity.
2Ease of operation
If the battery cells are not securely fastened, then the ease of assembly is improved, but the stability of cell position during impact deteriorates
Solution Approach 1:
Fastening portions are pre-formed on the housing components during manufacturing, allowing for quick and easy assembly of battery cells. The pre-existing fastening structures eliminate the need for complex assembly operations while ensuring secure cell positioning.
Solution Approach 2:
Fastening holes serve as intermediary elements that connect the housing components to each other and to the battery cells. These intermediaries facilitate easy assembly while maintaining strong mechanical connections that secure cell positions during impact.
3Strength
If a robust fastening system with multiple fastening portions is used, then the structural strength and impact resistance are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The fastening system is segmented into multiple discrete fastening portions located at different positions on the housing components. Each fastening portion is a simple, standardized feature that can be easily manufactured, and the distributed arrangement provides comprehensive structural reinforcement without requiring complex fastening mechanisms.
Data Source
AI summary
A battery module includes one or more battery cells aligned in one direction, a housing member that accommodates the battery cells, and is opposite to a whole of at least one surface of the battery cells; and a top cover that is connected and fastened to at least one portion of the housing member, and covers tops of the battery cells.