Electric Pump Heat Dissipation Plate Thermal Management
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Solution Overview
Problem
High-power electric pumps in vehicle thermal management systems face reduced service life due to inadequate heat dissipation of the electronic control unit, leading to performance degradation.
Innovation Solution
The electric pump design incorporates a heat dissipation plate made of metal, such as copper or aluminum, which is separately arranged and connected to the pump housing, and includes a heat dissipation plate between the electronic control board and the isolation sleeve, utilizing silicone grease or silica gel for enhanced heat conduction, ensuring efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If high-power electronic control unit is used to control the electric pump, then the control performance and functionality are improved, but heat generation increases and heat dissipation becomes insufficient, leading to reduced service life
Solution Approach 1:
A heat dissipation plate is introduced as an intermediary component between the electronic control board and the isolation sleeve. This plate serves as a thermal mediator that conducts heat away from the electronic control unit, resolving the contradiction between improved control performance and heat dissipation capability.
Solution Approach 2:
The heat dissipation function is extracted from the isolation sleeve structure and implemented as a separate, dedicated heat dissipation plate. This allows the electronic control board to be thermally isolated from the motor housing while providing specialized heat dissipation pathways.
2Device complexity
If the electronic control board is directly mounted on the isolation sleeve, then the device complexity is reduced, but stress distortion occurs at the bonding portion due to thermal expansion differences, affecting reliability
Solution Approach 1:
The heat dissipation plate acts as a mediator layer between the electronic control board and the isolation sleeve. This intermediate structure absorbs thermal expansion stresses, preventing direct stress transmission to the bonding portions and improving reliability without significantly increasing overall device complexity.
Solution Approach 2:
The heat dissipation plate provides localized thermal management and stress absorption at the critical bonding portion area. By concentrating heat dissipation and stress relief functions at the specific location where thermal expansion differences cause problems, the solution maintains overall structural simplicity while improving local reliability.
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 prolongs the service life of the electric pump by improving heat dissipation of the electronic control board, preventing performance degradation and reducing stress distortion from temperature changes.
Implementation Method 1
The electric pump design incorporates a heat dissipation plate made of metal, such as copper or aluminum, which is separately arranged and connected to the pump housing, and includes a heat dissipation plate between the electronic control board and the isolation sleeve, utilizing silicone grease or silica gel for enhanced heat conduction
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
An electric pump (100), comprising: a pump housing, a rotor assembly (3), a stator assembly (4), an isolation sleeve (7), a heat dissipation plate (8), and an electric control board (9). The pump housing defines a pump inner chamber; the pump inner chamber is partitioned into a first cavity (30) and a second cavity (40) by the isolation sleeve (7); the rotor assembly (3) is disposed in the first cavity (30); the stator assembly (4) and the electric control board (9) are disposed in the second cavity (40); the isolation sleeve (7) comprises a bottom portion (71); at least a portion of the heat dissipation plate (8) is disposed between the electric control board (9) and the bottom portion (71); at least a portion of the bottom portion (71) and at least a portion of the heat dissipation plate (8) are in direct contact, or are filled with thermal silicone grease or thermal silica therebetween, or are provided with a thermal patch therebetween. Or the first cavity (30) comprises a cavity fixedly formed by a portion of the heat dissipation plate (8) and the isolation sleeve (7). The structure is beneficial to the heat dissipation of the electric control board, thereby improving the service life of the electric pump.