Pouch Cell Battery Pack Spacer for Swelling Absorption
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Solution Overview
Problem
Existing battery packs face challenges in suppressing cell movement and absorbing cell swelling, which can lead to reduced reliability and performance.
Innovation Solution
A battery pack design featuring a fixing member with perforated holes that pass through from one end to the other, providing both hardness to suppress cell movement and a compressive force to absorb swelling, thereby enhancing product reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixing member is used to fix battery cells, then cell movement is suppressed, but cell swelling cannot be absorbed
Solution Approach 1:
The fixing member incorporates through-holes penetrating its entire thickness, transforming it from a solid rigid structure to a porous compressible structure. This allows the fixing member to maintain structural integrity for suppressing cell movement while enabling volume expansion to absorb cell swelling during battery operation
Solution Approach 2:
The fixing member is constructed from compressible materials such as foam or elastomer that inherently possess both structural stability and compressibility. This composite approach allows simultaneous achievement of movement suppression through rigid framework and swelling absorption through material compression
2Stability of the object's composition
If the fixing member is made hard to suppress cell movement, then stability improves, but swelling absorption capability deteriorates
Solution Approach 1:
The fixing member exhibits different mechanical properties in different regions and directions: it maintains high stability in lateral directions to suppress cell movement, while possessing compressibility in the vertical direction to absorb swelling. The through-holes are strategically positioned to enable localized compression without compromising overall structural stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution effectively minimizes dead space and improves the reliability of the battery pack by securely fixing cells and accommodating swelling, thus enhancing overall performance.
Implementation Method 1
A minimum thickness of the fixing member between the one of the wide surfaces and one of the through-holes may be about 10% to about 30% of a maximum thickness of the fixing member between the wide surfaces
Data Source
AI summary
The present disclosure provides a battery pack including battery cells including an electrode assembly in a pouch case and including one or more electrode tabs, and a fixing member between the battery cells to fix the battery cells, and defining through-holes passing from one end thereof to another end thereof.