Cross-Reinforced Battery Case Layout for Vibration Resistance
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Solution Overview
Problem
Conventional power storage devices face challenges in achieving improved vibration resistance while maintaining high energy density and reduced size, as reinforcement structures often compromise cell accommodation efficiency.
Innovation Solution
The design incorporates a first case with a reinforcement portion extending in one direction and a second case with a reinforcement portion extending orthogonally, allowing the cases to overlap and intersect, providing enhanced rigidity and vibration resistance while optimizing cell stacking and accommodation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reinforcement structure is provided to improve vibration resistance, then vibration resistance is improved, but efficiency of accommodating cells in case decreases leading to larger device size and decreased energy density
Solution Approach 1:
The patent transitions from planar reinforcement structures to three-dimensional intersecting reinforcement structures. The first reinforcement structure extends in a first direction while the second reinforcement structure extends in a second direction intersecting the first direction, creating a spatial cross structure that provides enhanced vibration resistance in multiple directions simultaneously without occupying excessive linear space.
Solution Approach 2:
The patent implements a nested configuration where the first and second reinforcement structures are positioned to intersect and support each other, forming a cross structure that is integrated within the case. The cases are provided to overlap with each other along a third direction, creating a compact nested arrangement that maximizes structural efficiency within limited space.
2Strength
If reinforcement structures are added to improve vibration resistance, then structural rigidity is enhanced, but device size increases
Solution Approach 1:
The patent employs three-dimensional intersecting reinforcement structures where the first reinforcement structure extends in a first direction and the second reinforcement structure extends in a second direction intersecting the first direction. This spatial arrangement provides enhanced structural rigidity in multiple directions without proportionally increasing the overall device volume.
Solution Approach 2:
The patent creates a composite structural system by combining the first case with the first reinforcement structure and the second case with the second reinforcement structure. The intersecting reinforcement structures form a composite framework that achieves high structural rigidity through the synergistic combination of multiple structural elements in different orientations.
Data Source
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AI summary
A power storage device includes: a first case (100) that accommodates a plurality of stacked first power storage cells (10A); and a second case (200) that accommodates a plurality of stacked second power storage cells (10B). The first case (100) has a first reinforcement portion (120, 30A) extending in a first direction, and the second case (200) has a second reinforcement portion (220, 30B) extending in a second direction intersecting the first direction. The first case (100) and the second case (200) are provided to overlap with each other along a third direction intersecting the first direction and the second direction, and are joined to each other.