Vehicle Battery Stack Housing for Impact Force Distribution
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Solution Overview
Problem
Existing electricity storage apparatuses, such as those described in Japanese Unexamined Patent Application Publication No. 2024-007753, are vulnerable to damage from impacts from the surroundings.
Innovation Solution
The apparatus includes a stacked body housed in a housing case with a holding member featuring a holding rising wall and flange, which is fixed to the case's peripheral wall, and a covering member that extends to cover the stacked body's outer edges, adhering to the top and bottom plates, to distribute and absorb impact forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electricity storage apparatus uses a simple housing structure, then the device complexity is reduced, but the protection against impact from surroundings deteriorates
Solution Approach 1:
The housing case is segmented into multiple functional components: top plate, bottom plate, peripheral wall, holding member with holding rising wall and holding flange, and covering member. This segmentation allows each component to perform a specific protective function while maintaining overall structural simplicity.
Solution Approach 2:
The holding rising wall and covering member are designed to absorb and distribute impact forces before they reach the electricity storage modules. The holding flange provides pre-positioning and securing of the stacked body, preventing displacement during impact events.
2Object-affected harmful factors
If the holding member is designed to fully cover the peripheral surface, then the protection against impact is improved, but the device complexity increases
Solution Approach 1:
The holding member is divided into two distinct parts: the holding rising wall that covers the peripheral surface for impact protection, and the holding flange that provides securing function. This segmentation allows each part to be optimized for its specific function without unnecessary complexity.
Solution Approach 2:
The holding member serves multiple functions: the holding rising wall provides impact protection and structural support, while the holding flange provides securing and positioning. This multi-functionality reduces the need for separate components, thereby controlling device complexity.
3Object-affected harmful factors
If the covering member extends to cover the outer edge portion, then the impact force distribution is improved, but the manufacturing complexity increases
Solution Approach 1:
The covering member is designed as a thin protective shell that extends to cover the outer edge portion of the stacked body. This thin-film approach provides effective impact force distribution without adding significant structural complexity or manufacturing difficulty.
Solution Approach 2:
The covering member extends in the horizontal plane to cover the outer edge portion, adding dimensional coverage without increasing vertical height. This dimensional approach allows impact force distribution across a larger area without complicating the manufacturing process.
Data Source
AI summary
Electricity storage apparatus includes: a stacked body mounted on a vehicle and formed by stacking an electricity storage module in the up-down direction; and a housing case that houses the stacked body. The housing case includes: a top plate positioned in a case upper surface of the housing case; a bottom plate positioned in a case lower surface of the housing case; a peripheral wall that connects the top plate and the bottom plate to each other; and a holding member. The stacked body includes: an upper surface; a lower surface; and a peripheral surface that connects the upper surface and the lower surface to each other. The holding member has: a holding rising wall; and a holding flange. The holding rising wall is formed so as to cover the peripheral surface. The holding flange is provided on the holding rising wall and is fixed to the peripheral wall.