Battery Module Cooling Fins for Uniform Cell Heat Dissipation
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Solution Overview
Problem
Conventional battery modules suffer from severe cooling deviation between battery cells, particularly affecting the outermost cells, which limits their performance and output due to indirect and inefficient heat transfer.
Innovation Solution
A battery module design with cooling fins between adjacent cells, directly facing a thermally conductive resin layer, and adhesive layers to secure the fins, along with a simplified frameless structure, enhances direct heat transfer and reduces positional cooling deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermally conductive resin layer is used to cool the battery cell stack, then heat transfer occurs, but the cooling deviation between outermost and central battery cells becomes severe
Solution Approach 1:
The patent divides the cooling function into multiple segments by placing cooling fins between adjacent battery cells. Each cooling fin independently contacts the thermally conductive resin layer, creating multiple heat transfer pathways. This segmentation ensures that both outermost and central battery cells have direct access to cooling fins, thereby reducing the cooling deviation that occurred in the conventional single-path cooling system.
Solution Approach 2:
The patent transitions from a single-plane cooling approach to a multi-dimensional cooling structure by inserting cooling fins in the interstitial spaces between adjacent battery cells. This dimensional change creates a three-dimensional heat transfer network where heat can be dissipated from multiple surfaces of each battery cell, not just from the outer surfaces, thereby均衡izing the temperature distribution across all cells.
2Temperature
If cooling fins are added between battery cells, then direct heat transfer is improved, but device complexity increases
Solution Approach 1:
The cooling fins serve multiple functions simultaneously: they act as heat transfer conduits between battery cells, provide structural support within the module, and serve as mounting points for adhesive layers. This multi-functionality reduces the need for separate dedicated cooling components, thereby improving cooling efficiency without proportionally increasing device complexity.
Solution Approach 2:
The patent merges the cooling function with the existing battery cell arrangement by placing cooling fins in the natural interstitial spaces between adjacent cells. This merging approach integrates the cooling system into the existing modular structure rather than adding a separate complex cooling subsystem, thus achieving direct heat transfer improvement with minimal increase in overall complexity.
3Stability of the object's composition
If adhesive layers are used to secure cooling fins, then cooling structure stability is improved, but manufacturing complexity increases
Solution Approach 1:
The adhesive layers are applied in a manner that allows the cooling fins to self-align and self-secure between battery cells during assembly. The adhesive is positioned to naturally bond the cooling fin to both adjacent battery cells, creating a self-stabilizing structure that reduces the need for additional fixing mechanisms or complex assembly procedures.
Solution Approach 2:
The adhesive layer acts as an intermediary material that bonds the cooling fin to the battery cells without requiring mechanical fasteners or complex joining structures. This intermediary approach provides stable thermal and mechanical coupling while simplifying the manufacturing process compared to alternative fixing methods.
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 improves cooling efficiency, reduces temperature differences between cells, and maintains a lightweight and high energy density, while eliminating the need for additional fixing structures, thus enhancing overall performance and capacity.
Implementation Method 1
a thermally conductive resin layer 31 is coated onto the bottom surface of the lower frame 30 that covers the lower portion of the battery cell stack 12
Implementation Method 2
the end portion of the cooling fin comes into contact with the thermally conductive resin layer
Data Source
AI summary
The battery pack according to one embodiment of the present disclosure includes: a lower pack housing including a plurality of module regions; a thermally conductive resin layer located in the module region; a battery module mounted on the module region and located on the thermally conductive resin layer; and an upper pack housing for covering the battery module, wherein the battery module comprises a battery cell stack in which a plurality of battery cells are stacked, and the battery cell stack directly faces the thermally conductive resin layer, wherein the battery cell stack includes cooling fins located between battery cells adjacent to each other among the plurality of battery cells, and wherein the end portion of the cooling fin comes into contact with the thermally conductive resin layer.