Liquid Cooling Plate Separator Layout for Uniform Battery Pack Cooling
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Solution Overview
Problem
Existing liquid cooling plates for battery packs suffer from poor heat dissipation efficiency at the liquid outlet and non-uniform heat dissipation across the energy storage pack, due to uniformly distributed cooling flow-channels that restrict the flow rate of cooling liquid.
Innovation Solution
A liquid cooling plate design featuring a non-uniformly distributed separator that divides the cooling chamber into flow-channels with varying cross-sectional areas, allowing for faster flow in smaller channels and slower flow in larger channels, thereby enhancing heat exchange time and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniformly distributed cooling flow-channels are used, then the structure is simple and easy to manufacture, but the heat dissipation efficiency at the liquid outlet is poor and heat dissipation uniformity is poor
Solution Approach 1:
The patent applies local quality by making the separator non-uniformly distributed in the cooling plate, creating flow channels with varying cross-sectional areas. The separator density increases from the liquid inlet side to the liquid outlet side, resulting in smaller flow channel areas near the outlet. This local variation in structure optimizes the flow velocity distribution, increasing cooling liquid velocity at the outlet where heat dissipation efficiency was previously poor, while maintaining good heat dissipation uniformity across the entire battery pack.
2Ease of operation
If uniformly distributed cooling flow-channels are used, then the flow rate is consistent throughout, but the high-temperature cooling liquid at the liquid outlet cannot be discharged quickly
Solution Approach 1:
The patent implements local quality by varying the separator distribution to create different flow channel characteristics in different regions. Near the liquid outlet, the separator is more densely distributed, creating smaller flow channel cross-sectional areas that increase cooling liquid velocity. This local structural optimization ensures that high-temperature cooling liquid at the outlet is discharged quickly, solving the problem of slow discharge while maintaining overall system operation.
3Duration of action of moving object
If the cooling flow-channel area is increased, then the heat exchange time is extended, but the flowing speed of cooling liquid decreases
Solution Approach 1:
The patent applies local quality by creating spatially varying flow channel areas through non-uniform separator distribution. In regions where extended heat exchange time is beneficial, larger flow channel areas are provided. Near the liquid outlet where rapid discharge is critical, smaller flow channel areas increase flowing speed. This local optimization resolves the contradiction between heat exchange time and flowing speed by matching flow channel characteristics to the specific thermal management needs of different regions.
Solution Approach 2:
The patent implements dynamics by creating a dynamic flow velocity profile through varying flow channel areas. The cooling liquid experiences different flow velocities at different positions along its path, with velocity increasing toward the outlet where the flow channel area decreases. This dynamic flow distribution optimizes both heat exchange effectiveness and discharge speed, allowing the system to adapt the flow characteristics to the thermal conditions at each location.
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 improved design increases the flowing speed of cooling liquid, enhances the cooling effect on battery packs, and simplifies the processing of the liquid cooling plate, reducing production costs and maintaining operational stability.
Implementation Method 1
The heat dissipation of the cells can be achieved through the flow of cooling liquid in the cooling flow-channel
Implementation Method 2
The heat dissipation of the cells can be achieved through the flow of cooling liquid in the cooling flow-channel
Data Source
Figure 1~2
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Figure 5~6
AI summary
A liquid cooling plate and a battery pack are provided. The liquid cooling plate includes a plate body and a separator. The plate body defines a cooling chamber, and the plate body is provided with a liquid inlet and a liquid outlet. The cooling chamber communicates with outside through the liquid inlet and the liquid outlet. The separator is installed to the plate body and separates the cooling chamber into cooling flow-channels, and adjacent cooling flow-channels communicate with each other. The separator is non-uniformly distributed at the plate body. Where the cooling flow-channel has a smaller flowing area, the cooling liquid flows faster, thereby increasing the flowing speed of the cooling liquid. Where the cooling flow-channel has a larger flowing area, the cooling liquid flows slower, thereby prolonging the heat exchange time of the cooling liquid and improving the uniformity of heat dissipation of the liquid cooling plate.