Battery Module Heat Dissipation Plates with Low Thermal Resistance Regions
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Solution Overview
Problem
Existing battery modules face challenges in efficiently dissipating heat without increasing weight or size, leading to nonuniform temperature distribution and potential performance degradation due to high thermal resistance at heat dissipation plate interfaces.
Innovation Solution
The battery module incorporates heat dissipation plates with low thermal resistance regions between interlayer and side wall plate portions, formed as an integrated continuous member, to enhance heat conduction to coolers, maintaining performance without increasing module size or weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipation plates are arranged between adjacent battery cell packs to dissipate heat, then heat dissipation capability is improved, but thermal resistance at interfaces increases leading to nonuniform temperature distribution
Solution Approach 1:
The heat dissipation plate is designed with varying thickness to create different thermal conductance regions. The thicker region (second region) provides lower thermal resistance for heat flow paths that encounter high resistance, while the thinner region (first region) maintains adequate heat dissipation for areas with already low thermal resistance. This non-uniform thickness distribution optimizes heat flow throughout the plate, reducing temperature nonuniformity across the battery cell packs.
2Temperature
If heat dissipation plates with higher thermal conductivity are used to reduce thermal resistance, then heat conduction is improved, but weight and size of the battery module increase
Solution Approach 1:
Instead of changing the material composition to achieve higher thermal conductivity, the invention changes the geometric parameter (thickness) of the heat dissipation plate. By varying the thickness across different regions of the plate, the thermal conductance is optimized without requiring materials with higher thermal conductivity, thereby avoiding the associated weight penalty.
3Temperature
If heat dissipation plates with higher thermal conductivity are used to reduce thermal resistance, then heat conduction is improved, but size of the battery module increases
Solution Approach 1:
The invention optimizes thermal resistance by varying the thickness parameter of existing heat dissipation plate regions rather than adding new materials or increasing overall plate dimensions. This approach reduces thermal resistance locally where needed without increasing the overall volume of the battery module.
4Ease of manufacture
If uniform thickness heat dissipation plates are used, then manufacturing is simplified, but thermal resistance varies causing nonuniform heat dissipation
Solution Approach 1:
The heat dissipation plate features a non-uniform thickness distribution with distinct first and second regions. The thicker second region is positioned to provide additional thermal conductance where heat flow encounters higher resistance, while the thinner first region suffices for areas with already effective heat flow paths. This local variation in geometry optimizes overall heat dissipation uniformity.
5Temperature
If thicker heat dissipation plates are used to reduce thermal resistance, then heat conduction is improved, but weight and size of the battery module increase
Solution Approach 1:
Rather than uniformly increasing the thickness of the entire heat dissipation plate, the invention selectively increases thickness only in the second region where thermal resistance is highest. This localized thickening provides the necessary thermal conductance improvement while minimizing the additional weight compared to a uniformly thicker plate design.
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
This configuration effectively radiates heat from battery cell packs, reducing temperature differences and maintaining performance by minimizing thermal resistance and avoiding size and weight increases.
Implementation Method 1
heat emitted from the battery cell packs 150 is conducted to the heat dissipation plates 110
Implementation Method 2
coolers 130 that absorb heat radiated from the battery cell packs 150 and absorbed by the heat dissipation plates 110
Implementation Method 3
heat radiated from the battery cell packs 150 and absorbed by the heat dissipation plates 110
Data Source
AI summary
A battery module includes; a plurality of battery cell packs; a plurality of heat dissipation plates and a cooler that absorbs heat radiated from the battery cell packs and absorbed by the heat dissipation plates. The battery cell packs and the heat dissipation plates being alternately stacked. Each of the heat dissipation plates has an interlayer plate portion that is in contact with corresponding two of the battery cell packs and side wall plate portions that extend in the stacking direction with respect to the interlayer plate portion on both end sides of the interlayer plate portion and that are in contact with the cooler at outer faces thereof, and each of the heat dissipation plates has a low thermal resistance region between the interlayer plate portion and each side wall plate portion, the low thermal resistance region having a lower thermal resistance than the interlayer plate portion.