Battery Cell Holder Structure for Expansion Suppression
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Solution Overview
Problem
As secondary battery applications require larger capacities, leading to increased battery cell sizes, damage from volume changes during charging becomes a significant issue.
Innovation Solution
A battery cell holder with partition walls, support walls, and protrusions is designed to prevent or mitigate damage by suppressing battery cell expansion. The support walls initially contact the battery cell, while the protrusions only contact the cell when it expands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cell size is increased to increase energy density, then capacity is improved, but damage from volume changes during charging worsens
Solution Approach 1:
The battery cell holder is divided into multiple partition walls that create individual insertion holes for each battery cell. Each partition wall can independently manage the expansion of adjacent battery cells, preventing expansion in one cell from affecting neighboring cells. This segmentation approach allows larger battery cells to be used while controlling the harmful effects of volume changes during charging.
Solution Approach 2:
The partition walls are designed with asymmetric structures featuring protrusions on one side and flat surfaces on the other. The protrusions are positioned at specific distances from the center of insertion holes to provide localized support where needed. This local quality differentiation allows the holder to accommodate volume changes in specific areas while maintaining overall structural integrity, enabling larger battery cells without increased damage risk.
2Reliability
If support structure is added to suppress battery cell expansion, then cell damage is prevented, but device complexity increases
Solution Approach 1:
The partition walls serve multiple functions simultaneously: they define insertion holes for battery cell placement, provide structural support to suppress expansion, and include integrated protrusions for localized constraint. By merging these functions into a single component rather than using separate support elements, the design prevents cell damage while minimizing the increase in device complexity.
Solution Approach 2:
The partition walls are designed as multi-functional elements that perform insertion guidance, structural support, and expansion constraint functions. The same partition wall structure that defines the insertion hole also provides the protrusions for suppressing cell expansion. This universality reduces the number of separate components needed, maintaining simplicity while achieving reliable cell protection.
Data Source
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AI summary
A battery cell holder includes a plurality of partition walls defining an insertion hole into which a battery cell is inserted, a plurality of support walls positioned between the plurality of partition walls, and a plurality of protrusions formed on the plurality of partition walls, wherein a distance between a center of the insertion hole and the plurality of support walls may be less than a distance between the center of the insertion hole and the plurality of protrusions.