Battery Module Case Deformation Part Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing battery module configurations with deformation members are complex and increase production costs, while also risking battery safety due to internal short-circuits leading to pressure buildup and potential rupture.
Innovation Solution
A battery module with a module case containing a flat-shaped battery cell and a deformation part that swells outward when the battery expands, allowing for expansion without preventing it, thus enhancing safety by preventing internal current increases during short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a deformation member is disposed in the module case to facilitate battery cell expansion, then battery safety is improved by preventing internal pressure buildup, but the structure becomes complex and production cost increases
Solution Approach 1:
The deformation part is integrated into the module case as an integral structure rather than being a separate component. The case body and deformation part form a unified structure where the deformation part is directly formed from the case material, eliminating the need for separate deformation members and simplifying the overall structure while maintaining the expansion facilitation function
Solution Approach 2:
The module case serves dual functions: it provides structural protection for the battery cell and simultaneously acts as the deformation part that facilitates expansion. The case body is designed with specific geometric features (inclined surfaces, curved surfaces) that enable it to deform and create expansion space without requiring additional specialized components
2Reliability
If a deformation member is added to the module case, then battery expansion is enabled, but manufacturing complexity and production cost increase
Solution Approach 1:
The deformation part is formed as an integral part of the module case through a single molding process. The case and deformation part are manufactured together as one piece, eliminating separate assembly steps and reducing manufacturing complexity and production costs
Solution Approach 2:
The module case is designed with specific geometric parameters (inclined surfaces at 30-60 degrees, curved surfaces with specific radii) that enable deformation functionality. By optimizing these geometric parameters, the case achieves expansion facilitation through its shape alone without requiring additional components or complex manufacturing processes
3Strength
If the module case is made rigid to protect the battery cell, then structural strength is improved, but the battery cell cannot expand when internal pressure rises
Solution Approach 1:
The module case exhibits different mechanical properties in different regions. The case body maintains high rigidity for structural protection, while the deformation part is designed with specific geometric features (thin-walled structures, inclined surfaces, curved surfaces) that enable controlled deformation. This local differentiation allows the case to be both strong and expandable
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 solution enables safe battery expansion by using a simple configuration that prevents internal current rises during short-circuits, reducing production costs and ensuring module safety without obstructing the battery's expansion.
Implementation Method 1
the deformation part is formed so as to be able to swell toward the outside of the module case when the battery cell expands
Data Source
AI summary
The present invention includes a battery cell, and a module case that contains the battery cell. The battery cell is formed in a flat shape in which a laminate current collector in which a positive current collector and a negative current collector are laminated or wound with a separator interposed therebetween, and an electrolytic solution are contained in a packaging body. The module case includes a deformation part swelling toward a principal surface side of the battery cell, at a position that faces the principal surface of the battery cell in the flat shape, and the deformation part is formed so as to be able to swell toward the outside of the module case when the battery cell expands.