Battery Module Tube Circulation Layout for Uniform Cell Cooling
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Solution Overview
Problem
Conventional battery modules experience uneven heat dissipation due to high flow resistance between battery cells, leading to overheating and increased risk of damage or explosion, especially for cells farther away from the cooling fans.
Innovation Solution
A heat-dissipation circulation structure is introduced, featuring a shell with a fluid channel and tubes that guide cold fluid directly to each battery cell, allowing for uniform cooling by injecting cold fluid through a fluid injection port and extracting hot fluid through an extraction port, thereby reducing temperature gradients and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cold air is blown into the battery module from the blowing fan, then the battery cells near the fan can be cooled, but the battery cells farther away from the fan cannot receive sufficient cold air due to high flow resistance
Solution Approach 1:
The battery module is divided into multiple cooling zones with independent fluid channels. Each battery cell group has its own dedicated cooling channel and tube, allowing cold fluid to be distributed uniformly to all regions rather than relying on natural convection from a single fan location.
Solution Approach 2:
A low flow resistance fluid channel and tubes are introduced as intermediaries to transport cold fluid from the blowing fan to all battery cell positions. These channels act as mediators that overcome the high flow resistance between battery cells, ensuring uniform cold air distribution throughout the module.
2Quantity of substance
If battery cells are densely packed to increase power density, then more energy can be stored, but flow resistance increases and heat dissipation efficiency deteriorates
Solution Approach 1:
A fluid-based cooling system with dedicated channels and tubes is implemented to actively transport cold fluid through the densely packed battery cells. This pneumatic/hydraulic approach overcomes the natural convection limitations caused by high density packing, ensuring efficient heat removal from all cells regardless of their position.
Solution Approach 2:
The cooling system is segmented into multiple independent channels, each serving specific battery cell groups. This segmentation allows cold fluid to reach all cells uniformly even when densely packed, preventing heat accumulation in inner regions while maintaining high cell density for increased energy capacity.
3Device complexity
If conventional fan-based cooling is used, then the structure is simple, but temperature gradient across battery cells increases leading to uneven aging
Solution Approach 1:
The cooling system is divided into multiple segmented channels with individual tubes for each battery cell or group of cells. This segmentation enables precise temperature control for each cell, eliminating the temperature gradients that cause uneven aging while maintaining a relatively simple overall structure through modular channel design.
Solution Approach 2:
Each battery cell position is equipped with its own dedicated cooling tube and channel section, providing localized cooling quality tailored to each cell's thermal needs. This local quality approach ensures uniform temperature distribution across all cells, preventing the temperature gradients that lead to differential aging rates.
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 solution ensures uniform heat dissipation across all battery cells, reducing the risk of damage or explosion and extending the lifespan of the battery system by maintaining optimal temperatures during charging and discharging.
Implementation Method 1
a cold fluid is injected into the fluid channel via the fluid injection port of the fluid injection device. The cold fluid flows into the space where the battery cells in the battery fixed holder are located via the tubes protruding in the fluid channel. Then, the cold fluid blows or circulates towards the location of the battery cells so as to dissipate the heat generated on the battery cells during charging or discharging.
Data Source
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AI summary
This disclosure provides a battery system including a shell, a battery module, a fluid channel, and a plurality of tubes. The shell includes a fluid extraction port and a fluid extraction port. The battery module is disposed in the shell, and includes a battery fixed holder for accommodating a plurality of battery cells. The fluid channel is disposed above the battery fixed holder, and communicated with the fluid injection device. Each of the tubes is having an upper opening in the fluid channel, and having a side opening facing the battery cores. The fluid channel is communicated with a space where the battery cells are located via the tubes. A fluid is injected into the fluid channel via the fluid injection port, flows to the space where the battery cells are located via the tubes, and then is exhausted from the fluid extraction port.