Battery Outer Case Reinforcement for Crush Resistance
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Solution Overview
Problem
Conventional energy storage apparatuses have weak crush resistance in the alignment direction of the case body and case lid body, which inadequately protects the energy storage device against external impacts.
Innovation Solution
Incorporating a plate-shaped member aligned with the energy storage device and extending along the outer case, with protrusions in the alignment direction to reinforce the outer case's strength, enhancing crush resistance and protection against external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If only an outer case is used to accommodate the energy storage device, then the device structure remains simple, but the crush resistance in the alignment direction of case body and case lid body is weak
Solution Approach 1:
The plate-shaped member is divided into multiple protrusions that are distributed along the outer case, with each protrusion providing localized reinforcement in the alignment direction of the case body and case lid body. This segmentation allows the reinforcement function to be distributed across multiple points rather than requiring a single complex structure
Solution Approach 2:
The plate-shaped member extends in a direction intersecting with the alignment direction of the case body and case lid body, adding a new dimensional aspect to the reinforcement. The protrusions extend in the alignment direction while the plate itself extends perpendicular to this direction, creating a three-dimensional reinforcement structure that enhances crush resistance without simply thickening the existing components
2Reliability
If the outer case is reinforced to improve protection against external impact, then the protection performance improves, but the weight of the outer case increases
Solution Approach 1:
Instead of uniformly reinforcing the entire outer case, the plate-shaped member with its protrusions provides localized reinforcement specifically in the alignment direction of the case body and case lid body where crush resistance is most needed. This allows protection performance to be improved in critical areas without adding excessive weight across the entire structure
Solution Approach 2:
The plate-shaped member is formed from a material with higher strength than the outer case material, creating a composite structure where the plate-shaped member acts as a reinforcement layer. This allows the outer case to maintain its original lightweight material while the plate-shaped member provides enhanced protection against external impact
Data Source
AI summary
An energy storage apparatus includes an energy storage device including a case, an outer case in which the energy storage device is accommodated, and a plate-shaped first plate-shaped member aligned with the energy storage device in a first direction and disposed along the outer case, in which the case includes a case body and a case lid body that are joined to each other, the case body and the case lid body are disposed and aligned in a second direction intersecting with the first direction, and the first plate-shaped member includes a plate-shaped member protrusion that protrudes in the first direction and extends toward an end edge of the plate-shaped member in the second direction.