Battery Module Case Structure for Faster Heat Dissipation
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Solution Overview
Problem
Existing battery modules face challenges in heat dissipation and temperature control, particularly in high-temperature environments and during fast charging, leading to potential thermal runaway and safety risks.
Innovation Solution
A battery module design featuring a module case with uneven portions on its inner surface, allowing for improved heat dissipation through increased surface area contact with battery cells, and the use of thermal resin to enhance heat transfer while reducing resin usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a battery pack is divided into multiple battery modules for easier handling and installation, then the ease of operation is improved, but the number of connection terminals increases, leading to increased device complexity and higher production costs
Solution Approach 1:
The patent combines multiple connection terminals into a single integrated connection element. This connection element includes a first connection terminal electrically connected to the negative electrode tab and a second connection terminal electrically connected to the positive electrode tab, merging what would otherwise be separate connection points into one unified component that simplifies the overall battery module structure.
Solution Approach 2:
The connection element serves multiple functions simultaneously: it provides both negative and positive electrical connections, acts as a structural support component, and enables both current collection and mechanical bonding. This multi-functionality reduces the total number of components needed in the battery module assembly.
2Reliability
If separate connection terminals are used for positive and negative electrodes, then the reliability of electrical connection is improved, but the manufacturing cost increases due to additional components and assembly steps
Solution Approach 1:
The patent combines multiple connection terminals into a single integrated connection element. This connection element includes a first connection terminal electrically connected to the negative electrode tab and a second connection terminal electrically connected to the positive electrode tab, merging what would otherwise be separate connection points into one unified component that simplifies the overall battery module structure.
Solution Approach 2:
The connection element is designed to automatically provide both positive and negative electrical connections through its integrated structure. The first and second connection terminals are inherently positioned and configured to connect to their respective electrode tabs, eliminating the need for separate assembly operations for each terminal.
3Stability of the object's composition
If a rigid support structure is used to maintain battery cell positions, then the stability of the battery module is improved, but the absorption of expansion forces during charging is reduced, potentially causing deformation
Solution Approach 1:
The patent employs a flexible connection element that can deform elastically to accommodate battery cell expansion during charging cycles. The connection element includes flexible connection portions that can bend and stretch, providing a flexible support structure that maintains cell positions while absorbing expansion forces, preventing both instability and excessive rigidity.
Solution Approach 2:
The connection element transitions from a static rigid structure to a dynamic flexible structure that can adapt its shape and stiffness based on operational conditions. During normal operation, it maintains stable cell positioning, but during expansion, it flexes to absorb forces, demonstrating dynamic behavior that responds to changing mechanical demands.
Data Source
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AI summary
Provided is a battery module having improved heat dissipation performance to appropriately control heat of the battery module. The battery module includes a cell assembly including a plurality of battery cells stacked in at least one direction and a module case having an inner space in which the cell assembly is accommodated, the module case including an uneven portion formed on at least a part of an inner surface of the module case in a direction not parallel to a stacking direction of the plurality of battery cells.