Battery Pack Cover Structure for Underbody Impact Resistance
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Solution Overview
Problem
Existing electric storage apparatuses face an issue where impacts from below cause deformation of the protective plate, necessitating a larger size to accommodate this deformation, increasing the overall size of the apparatus.
Innovation Solution
The apparatus incorporates a reinforcement member and connection members that overlap with each other and battery cells, allowing for improved impact absorption and reduced deformation, thereby minimizing the size and weight of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective plate is used to absorb impacts from below, then impact resistance is improved, but the apparatus size increases due to required deformation space
Solution Approach 1:
The patent combines the protective plate function with the connection member structure. The connection member between the upper and lower cases serves dual purposes: structurally connecting the cases and functionally acting as the protective element that absorbs impacts. This merging eliminates the need for a separate protective plate and its associated deformation space.
Solution Approach 2:
The connection member is designed to perform multiple functions simultaneously: structural support, impact absorption, and spatial optimization. By making the connection member universal, the patent eliminates redundant components and reduces the overall apparatus volume while maintaining impact resistance.
2Strength
If excessive rigidity is added to prevent deformation, then structural integrity is improved, but weight and complexity increase
Solution Approach 1:
The patent optimizes the physical parameters of the connection member, such as its cross-sectional shape and material properties, to achieve the required structural integrity with minimal weight. By carefully adjusting these parameters, the connection member provides sufficient strength without requiring excessive rigidity that would increase weight.
Solution Approach 2:
The patent employs composite material structures in the connection member, combining materials with different properties to achieve optimal strength-to-weight ratio. This allows the connection member to maintain structural integrity under impact while minimizing the overall weight of the apparatus.
Data Source
AI summary
The size of an electric storage apparatus is reduced. An electric storage apparatus according to the present disclosure includes: a first cover; a plurality of battery cells including a pair of electrode terminals disposed above the first cover; a reinforcement member disposed between the plurality of battery cells; and a second cover disposed below the first cover, in which the electric storage apparatus includes a first connection member configured to connect the first cover to the second cover, the first connection member being disposed between the first cover and the second cover, and at least a part of the first connection member overlaps with the reinforcement member as viewed from an up-and-down direction.