Battery Module Support Layout for Electrolyte Flow Paths
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Solution Overview
Problem
The existing battery module design in Japanese Patent Laying-Open No. 2023-074271 restricts the flow of electrolyte solution due to overlapping protrusions, which narrows the flow path and affects the reliability of the battery module.
Innovation Solution
The battery module design includes first and second supporting portions with protrusions that extend in orthogonal directions, allowing for non-overlapping paths for electrolyte solution flow and efficient cooling, while distributing the pressing forces to reduce path narrowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If protrusions of the side wall portion and partition wall portion extend in the same direction and overlap in the stacking direction, then structural support is improved, but the flow path for electrolyte solution becomes narrow
Solution Approach 1:
The invention changes the arrangement from one-dimensional overlapping in the stacking direction to two-dimensional distribution in the width direction. The protrusions are arranged such that they extend in the same direction but are positioned at different locations in the width direction, preventing overlap when viewed from the stacking direction. This dimensional redistribution maintains structural support while preserving electrolyte flow paths.
Solution Approach 2:
The invention applies different spatial configurations to different regions of the supporting structure. By positioning protrusions at specific locations in the width direction rather than uniformly overlapping them, the design creates localized support zones that do not interfere with electrolyte flow paths, thus achieving both structural integrity and fluid circulation.
2Stability of the object's composition
If pressing forces are applied from both sides beside the battery cell, then mechanical stability is improved, but the flow path for electrolyte solution is restricted
Solution Approach 1:
The invention redistributes the pressing force application from a single overlapping region in the stacking direction to multiple separated regions in the width direction. This allows mechanical stability to be maintained through distributed support while preventing concentration of pressing forces that would narrow electrolyte flow paths.
3Strength
If protuberance portions and ribs are disposed to overlap in the stacking direction, then supporting strength is improved, but electrolyte solution flow is hindered
Solution Approach 1:
The invention transitions from vertical stacking of support elements to horizontal distribution across the width direction. This allows the supporting structure to maintain strength through distributed rib and protuberance arrangements while preserving adequate spacing for electrolyte solution circulation paths.
Data Source
AI summary
A first supporting portion and a second supporting portion sandwich one battery cell of a plurality of battery cells in a first direction. The first supporting portion includes a plurality of first protrusions. Each of the plurality of first protrusions protrudes with respect to a first main surface portion in the first direction and extends in the form of a strip along a second direction orthogonal to the first direction. The second supporting portion includes a plurality of second protrusions. Each of the plurality of second protrusions protrudes with respect to a second main surface portion in the first direction. When viewed in the first direction, each of the plurality of second protrusions extends in the form of a strip so as not to overlap with the plurality of first protrusions, or extends in the form of a strip along a third direction different from the second direction.