Electric Coolant Pump PCB Support for Uniform Heat Dissipation
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Solution Overview
Problem
Existing electric coolant pumps face challenges in effective heat dissipation due to production-related dimensional variations in the separating can and supporting structure, leading to inconsistent heat transfer and increased manufacturing costs.
Innovation Solution
The electric coolant pump features a plane printed circuit board supported by at least three height-adjusted supporting elements, with a precisely adjusted axial gap filled with a heat conductive means, allowing for consistent heat transfer to the coolant, reducing manufacturing tolerances and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the axial gap between the printed circuit board and separating can bottom wall is filled with heat conductive paste, then heat transfer is improved, but the different layer thicknesses dehomogenize the heat transfer
Solution Approach 1:
The supporting elements are pre-adjusted to a specific height before assembly, ensuring that the axial gap between the printed circuit board and separating can bottom wall is uniformly distributed. This preliminary height adjustment prevents uneven heat conductive paste layers, thereby maintaining homogeneous heat transfer across the entire interface.
Solution Approach 2:
The invention changes the critical parameter of supporting element height to achieve uniform gap distribution. By precisely controlling the height of supporting elements, the system ensures consistent axial gap thickness, which directly enables uniform heat conductive paste application and homogeneous heat transfer throughout the interface.
2Ease of manufacture
If the separating can and supporting structure are subject to production-related dimensional variations, then manufacturing flexibility is maintained, but the height of the axial gap in every manufactured pump becomes different
Solution Approach 1:
The supporting elements undergo preliminary height adjustment through trimming or selection processes before final assembly. This pre-adjustment compensates for dimensional variations in the separating can and supporting structure, ensuring that the final axial gap height remains consistent across all manufactured pumps despite production tolerances.
Solution Approach 2:
The supporting elements act as intermediary components that mediate between the printed circuit board and separating can bottom wall. By adjusting the height of these intermediate supporting elements, the system compensates for variations in other components, maintaining consistent axial gaps without requiring tight tolerances on all parts.
3Stability of the object's composition
If the printed circuit board is axially supported within the pump housing, then structural stability is achieved, but the axial gap between components varies due to production tolerances
Solution Approach 1:
The supporting elements are pre-adjusted to precise heights before being installed to support the printed circuit board. This preliminary height calibration ensures that while the printed circuit board is stably supported, the axial gap remains uniform across all pumps, compensating for production tolerances in other components.
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 reliable heat dissipation by maintaining a constant axial gap for efficient heat transfer, reducing material and production costs, and preventing overheating.
Implementation Method 1
The axial gap is filled with a heat conductive means
Data Source
AI summary
An electric coolant pump for providing an automotive cooling circuit with a coolant includes an electric motor to drive the electric coolant pump, a pump housing, a separating can, a printed circuit board, and permanently height-adjusted supporting elements. The separating can includes a substantially plane separating can bottom wall which lies in a cross plane, and a substantially cylindrical separating can shell which fluidically separates a wet zone from a dry zone. The printed circuit board is arranged substantially parallel to and not in direct contact with the separating can bottom wall so that an axial gap exists which is filled with a heat conductive means. The supporting elements axially support the plane printed circuit board. Each supporting element has a distal tip which is trimmed to define a height-constant axial gap having a nominal gap height between the printed circuit board and the separating can bottom wall.