Battery Module Heat Dissipation Layout for Uniform Cell Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The inconsistent cooling effects across battery cells in a module due to varying distances from the cooling medium transport device lead to inconsistent states of health (SOH) and reduced performance and lifespan of the battery module.
Innovation Solution
A heat dissipation mechanical part is introduced between battery cell layers, with varying densities and orientations of heat dissipation pipes to balance cooling effects, including a first region with higher pipe density farther from the cooling medium outflow and a second region with lower density closer to it, and additional features like secondary pipes and fasteners to enhance cooling medium circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If parallel air ducts are evenly distributed between battery cell layers, then the structure is simple and easy to manufacture, but the cooling effect is inconsistent across battery cells due to varying distances from the cooling medium transport device
Solution Approach 1:
The patent applies local quality by varying the density of heat dissipation pipes across different regions. The first heat dissipation region (farther from cooling medium outflow) has higher pipe density, while the second heat dissipation region (closer to cooling medium outflow) has lower pipe density. This non-uniform distribution compensates for the natural cooling gradient, ensuring consistent cooling effects across all battery cells despite their different distances from the cooling medium transport device.
Solution Approach 2:
The patent employs asymmetry by intentionally creating an asymmetric distribution of heat dissipation pipes that does not follow the symmetric even distribution of the air ducts. The heat dissipation mechanical part contains more heat dissipation pipes in regions farther from the cooling medium outflow region, creating an asymmetric configuration that actively compensates for the asymmetric cooling effect caused by distance variations.
2Ease of manufacture
If heat dissipation pipes are uniformly distributed, then the manufacturing process is simplified, but battery cells at different distances from the cooling medium outflow region experience different cooling effects
Solution Approach 1:
The patent implements local quality by configuring different densities of heat dissipation pipes in different regions of the heat dissipation mechanical part. Specifically, the first heat dissipation region has a first density of heat dissipation pipes, while the second heat dissipation region has a second density that is lower than the first density. This localized variation in pipe density ensures that battery cells farther from the cooling medium outflow receive sufficient cooling, achieving uniform cooling effects across all cells while maintaining a relatively simple manufacturing process.
3Temperature
If the density of heat dissipation pipes is increased in regions farther from the cooling medium outflow, then cooling consistency is improved, but the device complexity increases
Solution Approach 1:
The patent applies merging by integrating the heat dissipation pipes directly into the heat dissipation mechanical part, which is itself integrated between the first and second battery cell layers. The heat dissipation mechanical part combines multiple functions: it provides structural support, serves as a mounting platform for heat dissipation pipes, and acts as a heat transfer medium distribution system. This merging reduces the number of separate components and simplifies the overall device structure while achieving improved cooling consistency through variable pipe density.
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 design ensures more consistent cooling effects across battery cells, improving the SOH and extending the lifespan and performance of the battery cell group.
Implementation Method 1
The heat dissipation mechanical part includes a first heat dissipation region and a second heat dissipation region, and an average distance between a heat dissipation pipe in the first heat dissipation region and a cooling medium outflow region is longer than an average distance between a heat dissipation pipe in the second heat dissipation region and the cooling medium outflow region
Data Source
AI summary
Embodiments of this application provide a battery module, to improve consistency of cooling effects of battery cells, so that a battery cell group has a better states of health (SOH). The battery module includes: a heat dissipation mechanical part, which includes a first heat dissipation region and a second heat dissipation region. When an average distance between a heat dissipation pipe in the first heat dissipation region and a cooling medium outflow region is longer than an average distance between a heat dissipation pipe in the second heat dissipation region and the cooling medium outflow region, density of heat dissipation pipes in the first heat dissipation region is greater than density of heat dissipation pipes in the second heat dissipation region.