Battery Pack Fin Segmentation for Heat Radiation Efficiency
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Solution Overview
Problem
Existing battery packs face inefficiencies in heat radiation due to varying temperature differences between circulating fluid and outside air, leading to reduced heat radiation efficiency, especially in regions where the temperature difference between the fluid and the inside wall surface becomes insufficient.
Innovation Solution
A battery pack design that includes a housing with a fluid circulation system and fins arranged in a specific configuration, where the fluid passage is divided into regions with and without fins, allowing for increased heat exchange area and improved fluid flow direction to enhance heat radiation efficiency by increasing the number of fins and optimizing their placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If fins are formed in the whole region of the fluid passage in parallel to the flow direction, then the heat radiation area between the fluid and the inside wall surface is increased, but the heat radiation efficiency is reduced in regions where the temperature difference between the fluid and outside air becomes small
Solution Approach 1:
The fluid passage is divided into a first region where fins are arranged and a second region where fins are not arranged. This segmentation allows the system to concentrate heat radiation fins in regions where they are most effective (where temperature difference is sufficient) while avoiding regions where they would be inefficient, thus resolving the contradiction between maximizing heat radiation area and maintaining heat radiation efficiency.
2Area of stationary object
If fins are formed to increase heat radiation area, then more heat can be radiated, but the temperature difference between fluid and inside wall surface becomes insufficient in certain regions
Solution Approach 1:
The patent applies different structural qualities to different regions of the fluid passage: the first region has fins arranged to maximize heat radiation area, while the second region has no fins to preserve adequate temperature difference. This local differentiation resolves the contradiction by allowing each region to operate under optimal conditions for its specific thermal characteristics.
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 heat radiation efficiency by ensuring a larger temperature difference between the fluid and the inside wall surface, allowing for more effective heat transfer and cooling of battery cells, even in regions where the temperature difference is initially insufficient, thereby enhancing the overall cooling performance.
Implementation Method 1
The first fin exchanges heat between fluid and the first inside wall surface
Implementation Method 2
The fluid circulation part is accommodated in the housing to circulate fluid for cooling the plurality of batteries in the housing
Data Source
AI summary
A first fin is formed on a first inside wall surface to protrude therefrom. The first fin exchanges heat between fluid and the first inside wall surface. A first fluid passage is divided between a first region that is a space where the first fin is arranged, and a second region that is a space where the first fin is not arranged. Fluid flows from the second region into the first region. The first fin includes an inflow port through which fluid flows into the first region, and an outflow port through which fluid flows out of the first region. The first fin is formed to extend from the inflow port to the outflow port. An area of the inflow port is larger than a cross-sectional area of the first fluid passage when viewed in a flow direction of fluid.