Vehicle Battery Cooling Layout for Heat Dissipation and EMI Suppression
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Solution Overview
Problem
Existing battery cooling structures for vehicles do not provide sufficient cooling performance while effectively suppressing electromagnetic noise, as the cooling plates primarily contact side walls in the short side direction, leaving the long side direction without adequate cooling and resulting in inefficient heat dissipation and noise production.
Innovation Solution
A battery cooling structure where cell groups are arranged with side walls extending in the long side direction oriented towards the vehicle body's upper and lower sides, with opposing positive and negative terminals canceling magnetic fields, and bus bars with opposite current directions to further suppress noise, while the long side walls contact a cooling plate for enhanced cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cooling plates contact only side walls in short side direction, then device complexity is reduced, but cooling performance becomes insufficient
Solution Approach 1:
The patent transitions from cooling only in the short side direction to cooling in multiple directions by having cooling plates contact both short side walls and long side walls of the cells. This multi-dimensional cooling approach significantly improves heat dissipation efficiency while maintaining reasonable structural complexity.
2Object-generated harmful factors
If cells are arranged with alternating polarity to cancel magnetic fields, then electromagnetic noise is suppressed, but cooling performance becomes insufficient due to limited cooling plate contact
Solution Approach 1:
The battery is divided into multiple cell groups with alternating polarity arrangements. This segmentation allows magnetic fields from adjacent cells to cancel each other, suppressing electromagnetic noise while enabling independent cooling plate contact with each cell group's side walls.
Solution Approach 2:
The patent extends cooling from a single direction to multiple directions by contacting both short side walls and long side walls of cells with cooling plates, achieving sufficient cooling performance while maintaining the alternating polarity arrangement for noise suppression.
3Temperature
If long side walls are used as heat-radiating surfaces, then cooling performance is improved, but device complexity increases due to additional cooling plate contact requirements
Solution Approach 1:
The cooling plates serve multiple functions: they cool the cells through thermal contact and simultaneously act as structural support elements. This multi-functionality allows the system to achieve improved cooling performance without proportionally increasing device complexity.
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 configuration improves cooling performance by utilizing long side walls as heat-radiating surfaces and suppresses electromagnetic noise, making the battery compatible with rapid charging and other high-demand scenarios while minimizing space requirements.
Implementation Method 1
side walls extending in the long side direction of the cells act as heat-radiating surfaces
Implementation Method 2
magnetic fields produced between the cell groups cancel out one another
Data Source
AI summary
In a battery cooling structure for a vehicle, a battery including a plurality of cell groups arrayed in a vehicle body front-and-rear direction. Each cell group includes a plurality of cuboid cells that are arrayed in a thickness direction of the cells. Each cell includes a positive terminal provided at one side wall extending in a short side direction of the cell and a negative terminal provided at another side wall extending in the short side direction. The positive terminals of one of the cell groups and the negative terminals of another of the cell groups, which cell groups are adjacent in the vehicle body front-and-rear direction, oppose one another in plan view.