Heat dissipation structure of motor control system of electric automobile

Abstract

The utility model provides a heat dissipation structure of a motor control system of an electric automobile, the heat dissipation structure is used for connecting a motor controller and a water cooling pipe of the electric automobile, and the heat dissipation structure comprises a first interface processing layer, a cured heat-conducting gel layer, a second interface processing layer, a heat-conducting insulating sheet layer and a heat-conducting double-sided adhesive layer which are stacked in sequence; the first interface processing layer is connected with a heat source of the motor controller, and the heat conduction double-faced adhesive tape layer is connected with the water cooling pipe. The motor controller and the water cooling pipe can be prevented from interface separation in the operation process, so that a lasting heat dissipation effect is provided, and meanwhile, the motor controller and the water cooling pipe have relatively high insulation performance.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation devices, and in particular to a heat dissipation structure of a motor control system of an electric vehicle. Background Art

[0002] As global awareness of sustainable development and environmental protection increases, the market demand for electric vehicles, as an important tool for reducing carbon emissions, is growing rapidly. Electric vehicles rely on motors for power output, and motor controllers play a core role in regulating and controlling motor operation. The performance of motor controllers directly affects the power efficiency, mileage, and reliability of electric vehicles. Therefore, improving the efficiency and heat dissipation performance of motor controllers is a key direction for the current development of electric vehicle technology.

[0003] At present, electric vehicle motor controllers are generally cooled by water cooling technology. The water cooling system usually includes components such as coolant, water pump, heat pipe and radiator. The heat generated by the motor controller is transferred to the radiator through the circulation of coolant and cooled down by air. Compared with the air cooling system, this water cooling technology can more effectively manage higher heat loads and keep the motor controller at a suitable operating temperature when running at higher power.

[0004] However, the heat dissipation effect of the existing heat dissipation structure will decrease with long-term operation. Utility Model Content

[0005] In view of the above-mentioned problems, the present application is proposed to provide a heat dissipation structure of an electric vehicle motor control system that overcomes the problems or at least partially solves the problems, including:

[0006] A heat dissipation structure of an electric vehicle motor control system, used for connecting the motor controller and a water cooling pipe of the electric vehicle, comprising: a first interface treatment layer, a cured thermal conductive gel layer, a second interface treatment layer, a thermal conductive insulating sheet layer and a thermal conductive double-sided adhesive layer stacked in sequence;

[0007] The first interface processing layer is connected to the heat source of the motor controller, and the heat-conductive double-sided adhesive layer is connected to the water cooling pipe.

[0008] Preferably, the thermal conductivity of the cured thermally conductive gel layer is 4-6 W / (m·K) and the tensile strength is 0.2 MPa.

[0009] Preferably, the thermal conductivity of the thermally conductive insulating sheet layer is 3-5 W / (m·K), and the AC withstand voltage is 3 kV.

[0010] Preferably, the adhesive force of the thermally conductive double-sided adhesive layer is 3N / cm.

[0011] Preferably, the first interface treatment layer and the second interface treatment layer are respectively made of an interface treatment agent.

[0012] Preferably, the cured thermally conductive gel layer is made of organic silicone thermally conductive gel.

[0013] Preferably, the thermally conductive insulating sheet layer is made of a thermally conductive silicone insulating sheet.

[0014] Preferably, the thermally conductive double-sided adhesive layer is made of a thermally conductive double-sided silicone tape.

[0015] This application has the following advantages:

[0016] In the embodiments of the present application, in order to solve the problem that the heat dissipation effect of the existing heat dissipation structure will decrease with long-term operation, the present application provides a solution for connecting the motor controller and the water-cooling pipe by using a multi-layer composite heat-conductive insulating structure, specifically: "A heat dissipation structure of an electric vehicle motor control system, used to connect the motor controller and the water-cooling pipe of the electric vehicle, comprising: a first interface treatment layer, a cured heat-conductive gel layer, a second interface treatment layer, a heat-conductive insulating sheet layer and a heat-conductive double-sided adhesive layer stacked in sequence; the first interface treatment layer is connected to the heat source of the motor controller, and the heat-conductive double-sided adhesive layer is connected to the water-cooling pipe". By stacking the first interface treatment layer, the cured heat-conductive gel layer, the second interface treatment layer, the heat-conductive insulating sheet layer and the heat-conductive double-sided adhesive layer in sequence, the heat of the motor controller can be fully transferred to the water-cooling pipe, and by providing the first interface treatment layer and the second interface treatment layer, the cured heat-conductive gel layer can be ensured to be stably bonded to the motor controller and the heat-conductive insulating sheet layer, and the interface separation between the motor controller and the water-cooling pipe can be avoided during operation, thereby providing a lasting heat dissipation effect and having high insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of a heat dissipation structure provided in one embodiment of the present application.

[0019] The reference numerals in the drawings of the specification are as follows:

[0020] 11. First interface treatment layer; 12. Cured thermal conductive gel layer; 13. Second interface treatment layer; 14. Thermal conductive insulating sheet layer; 15. Thermal conductive double-sided adhesive layer; 20. Motor controller; 30. Water cooling pipe. DETAILED DESCRIPTION

[0021] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] The inventors have found through analysis of the prior art that, with long-term operation, interface separation is likely to occur between the water-cooling pipe and the motor controller, which causes a decrease in the thermal contact efficiency between the water-cooling pipe and the heat dissipation pipe, thereby causing a decrease in the heat dissipation effect.

[0023] Reference Figure 1 , shows a heat dissipation structure of an electric vehicle motor control system provided by an embodiment of the present application, the heat dissipation structure is used to connect the motor controller 20 and the water cooling pipe 30 of the electric vehicle, including: a first interface treatment layer 11, a cured thermal conductive gel layer 12, a second interface treatment layer 13, a thermal conductive insulating sheet layer 14 and a thermal conductive double-sided adhesive layer 15 stacked in sequence;

[0024] The first interface treatment layer 11 is connected to the heat source of the motor controller 20 , and the heat conductive double-sided adhesive layer 15 is connected to the water cooling pipe 30 .

[0025] It should be noted that the thermally conductive insulating sheet layer 14 is tightly bonded to the surface of the water-cooling tube 30 through the thermally conductive double-sided adhesive layer 15, the first interface treatment layer 11 and the second interface treatment layer 13 are obtained by activating the surfaces of the motor controller 20 and the thermally conductive insulating sheet layer 14, respectively, the cured thermally conductive gel layer 12 is obtained by filling the activated motor controller 20 and the thermally conductive insulating sheet layer 14 with organic silicone thermally conductive gel and curing the cured thermally conductive gel layer 12, which is in a gel state before curing and molding, and can fill the tiny gaps between components of different shapes. Through the above-mentioned structural composition, the overall shape of the heat dissipation structure is adapted to the surface shapes of the motor controller 20 and the water-cooling tube 30, respectively, providing an effective basis for heat conduction between the motor controller 20 and the water-cooling tube 30.

[0026] In the embodiments of the present application, in response to the problem that the heat dissipation effect of the existing heat dissipation structure will decrease with long-term operation, the present application provides a solution for connecting the motor controller 20 and the water-cooling pipe 30 by using a multi-layer composite thermally conductive insulating structure. By sequentially stacking the first interface treatment layer 11, the solidified thermally conductive gel layer 12, the second interface treatment layer 13, the thermally conductive insulating sheet layer 14 and the thermally conductive double-sided adhesive layer 15, the heat of the motor controller 20 can be fully transferred to the water-cooling pipe 30. By setting the first interface treatment layer 11 and the second interface treatment layer 13, it can be ensured that the solidified thermally conductive gel layer 12 is stably bonded to the motor controller 20 and the thermally conductive insulating sheet layer 14, avoiding interface separation between the motor controller 20 and the water-cooling pipe 30 during operation, thereby providing a lasting heat dissipation effect while having higher insulation performance.

[0027] Next, a heat dissipation structure of a motor control system of an electric vehicle in this exemplary embodiment will be further described.

[0028] In this embodiment, the first interface treatment layer 11 and the second interface treatment layer 13 are respectively made of an interface treatment agent that can activate the surface of organic silicon and metal, and can effectively enhance the adhesion and thermal contact efficiency between components.

[0029] In this embodiment, the cured thermally conductive gel layer 12 is made of a silicone thermally conductive gel, such as a single-component or two-component silicone thermally conductive gel. The thermal conductivity of the cured thermally conductive gel layer 12 is 4-6 W / (m·K) and the tensile strength is 0.2 MPa. The cured thermally conductive gel layer 12 has a certain elastic deformation capacity, can absorb and resist mechanical stress caused by vibration and thermal expansion and contraction, and maintain stable thermal conductivity performance.

[0030] In this embodiment, the thermally conductive insulating sheet layer 14 is made of a silicone thermally conductive insulating sheet. The thermal conductivity of the thermally conductive insulating sheet layer 14 is 3-5 W / (m·K), and the AC withstand voltage is 3 kV. The thermally conductive insulating sheet layer 14 can provide high thermal conduction and electrical insulation capabilities at the same time, which not only helps to transfer heat, but also prevents the motor controller 20 from electrical failure due to voltage leakage, thereby improving the safety and stability of the overall system.

[0031] In this embodiment, the thermally conductive double-sided adhesive layer 15 is made of a silicone thermally conductive double-sided adhesive tape. The adhesive force of the thermally conductive double-sided adhesive layer 15 is 3N / cm. The surface of the thermally conductive double-sided adhesive layer 15 is pre-activated by an interface treatment agent to ensure that the thermally conductive insulating sheet layer 14 is stably attached to the surface of the water-cooling pipe 30.

[0032] In this embodiment, the water cooling pipe 30 is a metal aluminum casting.

[0033] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0034] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0035] The heat dissipation structure of an electric vehicle motor control system provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A heat dissipation structure of an electric vehicle motor control system, used to connect the motor controller and water cooling pipe of the electric vehicle, characterized in that: include: A first interface treatment layer, a cured thermally conductive gel layer, a second interface treatment layer, a thermally conductive insulating sheet layer and a thermally conductive double-sided adhesive layer are sequentially stacked; The first interface processing layer is connected to the heat source of the motor controller, and the heat-conductive double-sided adhesive layer is connected to the water cooling pipe.

2. The heat dissipation structure according to claim 1, characterized in that: The thermal conductivity of the cured thermally conductive gel layer is 4-6 W / (m·K) and the tensile strength is 0.2 MPa.

3. The heat dissipation structure according to claim 1, characterized in that: The thermal conductivity of the thermally conductive insulating sheet layer is 3-5 W / (m·K), and the AC withstand voltage is 3 kV.

4. The heat dissipation structure according to claim 1, characterized in that: The adhesive force of the thermally conductive double-sided adhesive layer is 3N / cm.

5. The heat dissipation structure according to claim 1, characterized in that: The first interface treatment layer and the second interface treatment layer are respectively made of an interface treatment agent.

6. The heat dissipation structure according to claim 1, characterized in that: The cured thermally conductive gel layer is made of organic silicon thermally conductive gel.

7. The heat dissipation structure according to claim 1, characterized in that: The thermally conductive insulating sheet layer is made of an organic silicon thermally conductive insulating sheet.

8. The heat dissipation structure according to claim 1, characterized in that: The thermally conductive double-sided adhesive layer is made of a thermally conductive double-sided silicone adhesive tape.

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