Vehicle Battery Module Bracket Layout for Collision Load Distribution
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Solution Overview
Problem
Existing vehicle power storage devices face issues with maintaining a satisfactory attachment state of battery modules during collisions, as the load input to secondary members is not effectively transmitted, potentially leading to loose attachments.
Innovation Solution
A vehicle power storage device configuration with beam members and brackets that distribute collision loads through intersecting brackets with load transmission portions, ensuring stable attachment by facing each other and being fastened along a direction, and incorporating staggered load transmission portions to disperse impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If second members are strewn across a side wall of the power storage unit, then the structure is simple and easy to manufacture, but the load transmission capability is insufficient and stress concentrates on the second members during collision
Solution Approach 1:
The bracket is divided into multiple load transmission portions disposed at intervals along the beam member. This segmentation allows the collision load to be distributed to multiple contact points between the first and second brackets, preventing stress concentration on single second members while maintaining a relatively simple overall structure.
Solution Approach 2:
The load transmission portions extend in a direction intersecting the beam member's length direction, creating a three-dimensional load distribution network. This dimensional approach allows collision loads to be transmitted through multiple spatial paths between opposing brackets, enhancing strength without proportionally increasing structural complexity.
2Quantity of substance
If multiple battery modules are disposed on both sides of the beam member, then the power storage capacity is increased, but the attachment stability during collision deteriorates due to insufficient load distribution
Solution Approach 1:
The bracket structure is segmented into multiple load transmission portions that contact opposing brackets at different locations. This segmentation enables effective load distribution across multiple attachment points, ensuring that the increased quantity of battery modules does not compromise attachment stability during collision events.
Solution Approach 2:
The first and second brackets work together as a combined load-bearing system, with their load transmission portions contacting each other to form a unified structure that resists collision forces. This merging of opposing brackets creates redundant load paths that maintain attachment stability regardless of the number of battery modules present.
3Reliability
If the brackets are designed with load transmission portions disposed at intervals, then the collision load distribution is improved, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The bracket incorporates multiple load transmission portions at intervals, which can be manufactured as integrated features of the bracket body through standard forming processes. This segmentation achieves effective load distribution while maintaining manufacturing feasibility through conventional fabrication methods.
Solution Approach 2:
The bracket design with intervalled load transmission portions serves multiple functions: it distributes collision loads, maintains attachment stability, and accommodates various battery module configurations. This multi-functionality is achieved through a single bracket design that can be manufactured using standard processes, reducing overall system complexity.
Data Source
AI summary
The vehicle power storage device includes a beam member extending in one direction, a battery module disposed on both sides of the beam member across the beam member, a first bracket that connects the battery module disposed on one side of the beam member and the beam member, and a second bracket that connects the battery module disposed on the other side of the beam member and the beam member, wherein the first bracket and the second bracket are opposed to each other in a direction intersecting the one direction, and include a load transmission portion disposed at an interval along the one direction.