Liquid-Cooling Plate Structure for Rigid, Leak-Resistant Battery Modules
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Solution Overview
Problem
Existing liquid-cooling heat dissipation systems for lithium battery modules face challenges in rigidity, heat dissipation efficiency, weight, and safety, particularly when used in lithium battery modules with high energy density and closely arranged units, as they often require additional supporting members that increase weight and risk deformation or coolant leakage.
Innovation Solution
A liquid-cooling heat dissipation plate made from a single piece of metal sheet, such as magnesium or aluminum alloy, with integrated heat dissipation pillars, and engaged to form a liquid flow chamber, enhancing heat exchange area and structural integrity through laser welding, ensuring high thermal conductivity and resistance to deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional liquid-cooling heat dissipation systems use additional supporting members to enhance structural rigidity, then structural strength is improved, but weight increases and device complexity increases
Solution Approach 1:
The patent merges the supporting member function directly into the liquid-cooling heat dissipation plate by forming protrusions that extend into the liquid flow chamber. These protrusions serve dual purposes: providing structural reinforcement to prevent plate deformation and maintaining cooling efficiency by allowing liquid flow between them. This integration eliminates the need for separate supporting members, reducing weight and device complexity while maintaining or improving structural rigidity.
2Stability of the object's composition
If traditional liquid-cooling heat dissipation systems use additional supporting members to prevent deformation, then structural stability is improved, but risk of coolant leakage increases due to more connection points
Solution Approach 1:
The supporting function is merged into the heat dissipation plate itself through integrally formed protrusions. Since these protrusions are part of the plate's monolithic structure rather than separate components requiring connection, they eliminate additional welding or fastening points that would otherwise increase coolant leakage risk. The plate maintains structural stability against deformation while reducing reliability concerns related to connection points.
Solution Approach 2:
The patent extracts the supporting function from separate supporting members and integrates it directly into the heat dissipation plate structure. By taking out the need for additional components and their associated connections, the design reduces potential failure points for coolant leakage while maintaining the necessary structural support to prevent plate deformation under thermal and mechanical loads.
3Strength
If liquid-cooling heat dissipation plate uses thicker design to enhance rigidity, then structural strength is improved, but heat dissipation efficiency decreases due to reduced thermal conductivity path
Solution Approach 1:
Instead of increasing plate thickness in the vertical dimension to improve rigidity, the patent adds structural reinforcement in the horizontal dimension through protrusions extending into the liquid flow chamber. These protrusions increase the moment of inertia and structural rigidity without significantly increasing the plate's thickness, thereby maintaining short thermal conduction paths from the battery contact surface to the cooling liquid, preserving heat dissipation efficiency.
4Weight of moving object
If liquid-cooling heat dissipation plate uses thinner design to reduce weight, then weight is reduced, but structural rigidity decreases leading to deformation risk
Solution Approach 1:
The patent compensates for reduced plate thickness by adding protrusions that extend horizontally into the liquid flow chamber. These protrusions increase the structural rigidity through increased moment of inertia and distributed support, allowing the plate to remain thin and lightweight while maintaining sufficient strength to prevent deformation under thermal and mechanical loads.
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 solution provides improved heat dissipation efficiency, increased structural rigidity, reduced weight, and enhanced safety by minimizing deformation and coolant leakage, maintaining optimal operating temperatures for lithium battery modules.
Implementation Method 1
The coolant is then injected from the liquid inlet for heat exchange and then flow out from the liquid outlet to take away the heat
Implementation Method 2
The heat generated by the lithium battery is then taken away by the coolant and dissipated outside the battery module
Implementation Method 3
liquid-cooling heat dissipation plate made from a single piece of metal sheet
Data Source
AI summary
A liquid-cooling heat dissipation plate, including: two heat dissipation components including a rectangular plate having oppositely an inner surface and an outer surface. Three edges of the inner surface are surrounded by a U-shaped frame with predetermined heights, the inner surface has a plurality of heat dissipation pillars protruding therefrom. The liquid-cooling heat dissipation plate is formed by joining and welding one of the heat dissipation components to the other with the inner surfaces facing to each other, and also resulting in formation of a liquid-flow chamber. At least one liquid inlet is provided to allow a cooling fluid to enter the liquid-flow chamber, and at least one liquid outlet is provided to allow the cooling fluid to exit the liquid-flow chamber, wherein the liquid inlet and the liquid outlet are arranged at the same side or different side of the liquid-cooling heat dissipation plate.