Vehicle Battery Pack Offset Exhaust Ports
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Solution Overview
Problem
In battery packs for vehicles, excessive heat generation can lead to decreased performance and life of battery cells due to interference between adjacent cell stacks' exhaust gases, which reduces cooling efficiency and increases the size of the pack.
Innovation Solution
The battery pack design includes two cell stacks with exhaust surfaces opposing each other, but with exhaust ports offset, preventing interference between exhaust gases and allowing for a reduced distance between stacks without compromising cooling efficiency, thereby enhancing space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between adjacent cell stacks is increased to prevent exhaust gas interference, then cooling efficiency is improved, but the size of the battery pack increases
Solution Approach 1:
The exhaust ports of adjacent cell stacks are positioned asymmetrically relative to each other. Specifically, the exhaust ports are arranged at different heights or lateral positions so that exhaust gases from one cell stack do not directly interfere with adjacent cell stacks, even when the stacks are closely spaced. This asymmetric arrangement allows for reduced spacing while maintaining effective cooling.
2Reliability
If the distance between adjacent cell stacks is increased, then thermal influence from adjacent stacks is reduced, but space efficiency decreases
Solution Approach 1:
The exhaust port arrangement utilizes vertical or lateral positioning differences to create spatial separation in a different dimension. By offsetting exhaust ports in the vertical direction or at different lateral positions, the design achieves thermal separation without increasing the horizontal distance between cell stacks, thereby improving space efficiency while maintaining thermal management performance.
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 effectively prevents exhaust gas interference, maintains cooling efficiency, and reduces the size of the battery pack by allowing for a narrower spacing between cell stacks, improving both performance and space utilization.
Implementation Method 1
heat exchange is performed between the refrigerant and the battery cells
Data Source
AI summary
A battery pack for a vehicle includes a first dell stack and a second cell stack. The first cell stack includes a plurality of cells and a first exhaust surface. The first exhaust surface has a first exhaust port from which refrigerant is discharged. The second cell stack includes a plurality of cells and a second exhaust surface. The second exhaust surface has a second exhaust port from which refrigerant is discharged. The first exhaust surface and the second exhaust surface are opposed each other, and at least part of the first exhaust port does not face the second exhaust port.