Battery Housing Cooling Grooves for Low-Resistance Module Thermal Management
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Solution Overview
Problem
Current battery module cooling systems for motor vehicles are costly to produce and maintain, with high heat conduction resistance between battery cells and cooling fluids, requiring complex and expensive cooling arrangements.
Innovation Solution
A battery housing with integrated cooling grooves in the housing walls allows direct contact between the cooling fluid and the housing material, reducing heat conduction resistance and enabling efficient cooling with a simple, low-cost production process, using a planar cover for easy assembly and cost savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an external cooling plate with cooling channels is used, then cooling function is provided, but heat conduction resistance between the cooling fluid and housing material increases
Solution Approach 1:
The cooling groove is integrated directly into the housing wall structure, merging the cooling channel function with the housing itself. This eliminates the need for separate external cooling plates and reduces heat conduction resistance by creating direct thermal contact between the cooling fluid and housing material.
Solution Approach 2:
The housing wall material itself serves as the thermal intermediary, conducting heat directly from the battery cells to the cooling fluid flowing in the groove. This eliminates intermediate thermal resistance layers that would exist with separate cooling plates.
2Temperature
If complex cooling arrangements are used, then cooling performance is improved, but production cost increases
Solution Approach 1:
The cooling function is merged into the housing structure itself through integrated cooling grooves, eliminating the need for separate complex cooling arrangements. This simplification reduces production costs while maintaining effective cooling performance.
Solution Approach 2:
The housing structure serves multiple functions: it provides mechanical protection for battery cells and simultaneously acts as a heat dissipation component through the integrated cooling grooves. This multi-functionality eliminates the need for separate dedicated cooling structures.
3Reliability
If cooling grooves are formed in housing walls, then heat conduction resistance is reduced, but housing structure complexity increases
Solution Approach 1:
The cooling grooves are strategically positioned in specific regions of the housing wall where heat dissipation is most needed, rather than uniformly throughout. This localized approach reduces thermal resistance at critical interfaces while minimizing overall structural 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
The solution significantly reduces production costs and enhances cooling efficiency by minimizing heat conduction resistance and allowing for passive cooling, while also providing structural reinforcement and impact protection for the battery cells.
Implementation Method 1
a heat conduction resistance between the battery cells and the cooling fluid in the cooling grooves can be kept particularly low
Data Source
AI summary
A battery housing for a battery module of a traction battery of a motor vehicle has (i) a housing for enclosing at least one battery cell of the battery module, (ii) at least one cooling groove which is formed in at least one housing wall of the housing after which is open away from the battery cell and which serves for conducting a cooling fluid, and (iii) a cover which is configured as a planar plate and which is connected to the housing wall and which serves for closing the at least one cooling groove. Owing to the cooling groove formed in the housing wall, the cover can be configured as an inexpensive planar plate, such that cooling of a battery module is made possible with little outlay in terms of production.