Battery Module Cooling Fins with Resin Contact for Uniform Cell Cooling
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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 heat transfer efficiency and reduces positional cooling deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermally conductive resin layer is coated onto the bottom surface of the lower frame to cool the battery cell stack, then heat transfer occurs from the battery cells to the heat sink, but the cooling deviation between outermost battery cells and center battery cells becomes severe due to indirect heat transfer through multiple layers
Solution Approach 1:
The patent introduces a cooling fin as an intermediary component between the battery cells and the thermally conductive resin layer. The cooling fin directly contacts both the battery cell surfaces and the resin layer, creating a direct heat transfer pathway that eliminates the need for heat to pass through the lower frame and multiple intermediate layers, thereby resolving the cooling deviation issue
Solution Approach 2:
The patent transitions from a planar cooling approach (coating resin on the bottom surface only) to a three-dimensional cooling structure by inserting cooling fins between adjacent battery cells. This dimensional change allows heat to be extracted from multiple surfaces of each battery cell simultaneously, improving overall cooling efficiency and uniformity
2Temperature
If cooling fins are inserted between adjacent battery cells to improve heat transfer, then cooling performance improves, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the cooling fin structure with the existing battery module components by having the cooling fin extend from the lower frame and integrate with the thermally conductive resin layer. This merging approach allows the cooling function to be added without creating entirely separate components, thereby reducing structural complexity while maintaining effective heat transfer
Solution Approach 2:
The cooling fin serves multiple functions simultaneously: it acts as a thermal conductor to extract heat from battery cells, provides structural support between adjacent cells, and creates a direct heat transfer pathway to the resin layer. This multi-functionality reduces the need for additional separate components, simplifying the overall structure
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 performance by directly transferring heat from cells to the resin layer, reducing temperature differences and enhancing energy density without increasing weight, thus optimizing battery module efficiency.
Implementation Method 1
the thermally conductive resin layer transfers heat generated in the battery cell stack 12 to the outside of the battery module 10
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.