Rotatable Battery Cell Module for Flexible Series-Parallel Layout
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Solution Overview
Problem
Existing secondary battery modules have fixed structures that limit design freedom and require specific terminal orientations, making it difficult to efficiently arrange cells in series or parallel configurations.
Innovation Solution
A secondary battery module design featuring rotatable cells connected by a rotation member with elastic or magnetic fixation, allowing cells to rotate relative to each other and facilitating easy series or parallel connections through adjustable terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple battery cells are arranged in a battery module, then the battery capacity increases, but the internal stress and deformation increase causing module deformation
Solution Approach 1:
The patent applies local quality by creating a non-uniform stress distribution pattern through strategically positioned through-holes in the support plate. Instead of uniform support across the entire plate, the through-holes are arranged in specific patterns that locally relieve stress in critical areas while maintaining support in other regions. This localized stress management prevents overall module deformation while accommodating the increased battery capacity from multiple cells.
Solution Approach 2:
The support plate is segmented into multiple regions by the through-holes, creating a distributed support structure. This segmentation allows different areas of the battery module to be supported independently, accommodating the expansion and contraction of individual battery cells during charge-discharge cycles. The segmented structure prevents stress concentration that would otherwise lead to module deformation.
2Stability of the object's composition
If a support plate is added to prevent deformation, then the structural stability improves, but the heat dissipation performance deteriorates
Solution Approach 1:
The support plate is designed with a porous structure containing multiple through-holes that extend through the thickness of the plate. This porous configuration serves dual functions: it maintains structural stability to prevent module deformation while simultaneously creating channels for heat dissipation. The through-holes allow thermal management fluids or air to flow through the support plate, carrying heat away from the battery cells without compromising the plate's mechanical support function.
3Ease of manufacture
If the support plate structure is simplified, then the manufacturing cost decreases, but the stress distribution becomes uneven causing deformation
Solution Approach 1:
The support plate employs a segmented design with through-holes distributed across its surface, creating a relatively simple structure that is easy to manufacture using standard fabrication processes. Despite this simplicity, the strategic arrangement of through-holes ensures even stress distribution by allowing the plate to flex and accommodate battery cell volume changes without concentrating stress in specific areas. This segmented approach achieves both manufacturing simplicity and stress distribution uniformity.
Data Source
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Figure 3(A)~3(C)
AI summary
The present invention relate to a secondary battery module that is capable of being disposed inside a secondary battery pack in various forms and being easily set in series or parallel between cells inside the secondary battery pack, thereby improving efficiency in designing the secondary battery pack. A secondary battery module according to the present invention includes a plurality of cells disposed to face each other, and a rotation member disposed between a surface of one cell and a surface of the other cell, which face each other in the plurality of cells, wherein the one cell rotates with respect to the other cell.