Battery Module Cooling Fin Structure for Swelling and Heat Control
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Solution Overview
Problem
Conventional battery modules face issues with battery cell swelling and temperature deviation, leading to structural deformation and performance deterioration.
Innovation Solution
A battery module design featuring cooling fins with varying thickness zones to uniformly apply pressure and enhance heat dissipation, incorporating a metal plate with an air layer for fire containment and improved heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional cooling fin with constant thickness is used, then the structure is simple and easy to manufacture, but the temperature deviation between different portions of battery cells cannot be effectively reduced
Solution Approach 1:
The cooling fin is designed with different thicknesses in different zones: a first thickness in the first zone corresponding to the first terrace portion, a second thickness in the second zone corresponding to the second terrace portion, and a third thickness in the third zone corresponding to the central portion. This local differentiation allows each zone to address the specific thermal characteristics of the underlying battery cell portion, effectively reducing temperature deviation while maintaining manufacturing feasibility.
2Productivity
If battery cells are stacked to form a battery module, then capacity and output are improved, but swelling of battery cells causes structural deformation and durability deterioration
Solution Approach 1:
The cooling fin's varying thickness profile is specifically designed to counteract the non-uniform swelling of battery cells. The thinner third zone in the central portion accommodates greater swelling displacement, while the thicker first and second zones provide structural support where swelling is less severe. This allows the battery module to maintain structural integrity and durability even as battery cells swell during operation.
Solution Approach 2:
The cooling fin structure is designed in advance with built-in compensation capacity for swelling. The differential thickness distribution pre-configures the system to absorb and accommodate swelling forces before they cause structural deformation, thereby protecting the battery module's durability throughout its operational life.
3Temperature
If cooling fins are added between battery cells, then heat dissipation is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The cooling fin's thickness parameter is varied across different zones to optimize heat dissipation. By changing the thickness parameter spatially rather than uniformly, the design achieves superior thermal management performance. The manufacturing process can accommodate these parameter changes through standard fabrication techniques, balancing performance improvement with manufacturing feasibility.
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 effectively controls swelling, reduces temperature deviation, enhances durability and safety, and improves heat dissipation, thereby extending the lifespan and performance of the battery module.
Implementation Method 1
A battery module design featuring cooling fins with varying thickness zones to uniformly apply pressure and enhance heat dissipation
Implementation Method 2
incorporating a metal plate with an air layer for fire containment and improved heat transfer
Data Source
AI summary
A battery module includes a battery cell stack comprising a plurality of battery cells. Each of the plurality of battery cells includes a first electrode lead and a second electrode lead. The battery module includes a cooling fin positioned between two adjacent battery cells of the plurality of battery cells. The first electrode lead and the second electrode lead protrude from each of the plurality of battery cells in opposite directions. The cooling fin comprises a first zone, a second zone and a third zone. The first zone and the second zone are spaced apart from each other along a direction parallel to a protruding direction of the first electrode lead and the second electrode lead. The third zone is between the first zone and the second zone. T width of the third zone is smaller than a width of the first zone and a width of the second zone.