Switching Device Base for Traction Box Thermal Management
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Solution Overview
Problem
Existing electrical switching devices in power modules for transport vehicles have complex structures and suboptimal heat exchange performance with cooling devices, leading to inefficiencies in thermal management.
Innovation Solution
A simplified switching device design where pressing elements exert a bearing force on a base positioned between the electrical assembly and the cooling device, improving contact quality and heat exchange efficiency, and incorporating a fastening system for secure integration within the traction box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the switching element is directly configured to withstand the bearing force from the spring system, then the switching device structure becomes complex and the switching element risks deformation, but if the bearing force is distributed, then the structure can be simplified
Solution Approach 1:
The patent introduces a base as an intermediary component between the switching element and the spring system. The base receives the bearing force from the pressing elements (springs) and distributes it to the support element, which then contacts the switching element. This intermediary structure protects the switching element from direct bearing force while maintaining structural integrity and simplifying the overall design.
Solution Approach 2:
The pressing force transmission path is segmented into multiple components: the spring system, pressing elements, base, support element, and switching element. This segmentation allows each component to be optimized for its specific function - the base and support element handle mechanical loading while the switching element focuses on electrical switching, reducing complexity and deformation risk.
2Ease of manufacture
If the pressing elements are positioned to directly contact the switching element, then the bearing force is applied directly to the switching element, but this increases structural complexity and assembly difficulty
Solution Approach 1:
The base acts as an intermediary platform that receives pressing elements and distributes their force through the support element to the switching element. This arrangement simplifies assembly by providing a clear hierarchical structure where pressing elements contact the base rather than requiring direct positioning on the switching element, reducing assembly complexity.
3Temperature
If the contact between the switching element and cooling device is improved, then heat exchange performance improves, but the switching element structure becomes more complex to withstand the bearing force
Solution Approach 1:
The base serves as a thermal intermediary between the switching element and the cooling device. It provides a large contact area with the cooling device for efficient heat exchange while receiving and distributing the bearing force from the spring system through the support element. This separates the thermal management function from the electrical switching function, allowing optimization of heat exchange without complicating the switching element structure.
Solution Approach 2:
The base combines multiple functions: mechanical support for the switching element, force distribution from the spring system, and thermal conduction to the cooling device. By merging these functions into a single component, the patent avoids the need for a complex multi-component structure while achieving both good thermal performance and mechanical stability.
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 enhances thermal performance by optimizing contact between the switching device and the cooling device, simplifies assembly and maintenance, and allows for standardized, easily replaceable switching devices, reducing manufacturing and maintenance costs while improving cooling efficiency.
Implementation Method 1
the pressing elements extending between the support element and the base and being configured to exert a bearing force on the base able to keep the base bearing against the cooling device... improve the quality of the contact between the cooling device and the base, and therefore the heat exchanges between the switching element and the cooling device
Data Source
AI summary
This electrical switching device, able to be integrated into an electrical traction box including a cooling device of the switching device, includes an electrical assembly provided with an electrical switching element. This switching device also includes a base for receiving the electrical assembly, intended to be positioned between the electrical assembly and the cooling device, and pressing elements for pressing the electrical assembly extending between the support element and the base and configured to exert a bearing force on the base, able to keep the base bearing against the cooling device when the switching device is integrated into the traction box.