Battery Module Bonding Layout for Cell Swelling Stability
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Solution Overview
Problem
Existing battery modules face stability issues due to swelling, leading to damage and structural collapse of battery cells, particularly those on the outer side, which compromises heat dissipation and overall performance.
Innovation Solution
A battery module design featuring a thermally conductive member with varying bonding forces across different portions, including a lower bonding force for outer cells, to accommodate swelling and maintain structural integrity and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermally conductive adhesive is used to bond battery cells to the module case for cooling and structural stability, then heat dissipation performance is improved, but the adhesive bonding force causes damage to outer cells during swelling
Solution Approach 1:
The patent applies different bonding forces at different locations of the battery module. The adhesive bonding force is reduced at outer cell positions compared to inner cell positions. This local differentiation allows outer cells to accommodate swelling without damage while inner cells maintain strong bonding for structural stability and heat dissipation.
Solution Approach 2:
The patent changes the bonding force parameter of the adhesive based on position. By adjusting the adhesive strength parameter at different locations (weaker at outer positions, stronger at inner positions), the system optimizes both swelling accommodation and heat dissipation performance simultaneously.
2Stability of the object's composition
If strong adhesive bonding is applied to all battery cells for structural stability, then structural integrity is improved, but outer cells are damaged during swelling
Solution Approach 1:
The patent implements spatially varying adhesive bonding characteristics. Outer cells have reduced bonding force to allow swelling accommodation, while inner cells maintain strong bonding for structural integrity. This local quality differentiation resolves the contradiction between overall structural stability and individual cell integrity during swelling.
3Ease of manufacture
If uniform adhesive bonding force is applied to all battery cells, then manufacturing simplicity is maintained, but swelling causes cell damage and structural collapse
Solution Approach 1:
The patent introduces position-dependent adhesive bonding force, creating different bonding characteristics at different locations within the battery module. This local quality approach improves reliability during swelling while maintaining reasonable manufacturing complexity through systematic adhesive application patterns.
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 design stabilizes the cell stacking state, prevents damage to outer cells, and maintains consistent cooling performance, thereby improving the battery's lifespan and cycle performance.
Implementation Method 1
a thermally conductive member interposed between the cell assembly and the module case, and configured to transfer heat
Data Source
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AI summary
According to one aspect of the present disclosure, a battery module with an improved stability against swelling is disclosed. A battery module according to one aspect of the present disclosure may include a cell assembly having a plurality of battery cells stacked in at least one direction; a module case configured to accommodate the cell assembly in an inner space; and a thermally conductive member interposed between the cell assembly and the module case, and configured to transfer heat and have a bonding force that varies across portions.