High-power electric vehicle wireless charging module imitates blood intelligent micro-channel heat dissipation system

Abstract

This utility model discloses a blood-inspired intelligent microchannel cooling system for high-power electric vehicle wireless charging modules. The system includes a microchannel cooling device, a coolant tank, an expansion valve, and a micro magnetic pump. The microchannel cooling device is attached to the surface of the electric vehicle wireless charging module and includes a liquid working fluid inlet pipe, a liquid working fluid outlet pipe, and longitudinal and transversely arranged latitude and longitude pipes on the surface of the electric vehicle wireless charging module. All of these are shape memory alloy pipes, covered with an elastic film. An expansion valve is installed on the outlet pipe of the coolant tank, and the liquid working fluid outlet pipe is connected to the inlet pipe of the coolant tank. By drawing inspiration from the adaptive heat dissipation mechanism of the human blood circulation system and using shape memory alloy materials, this system achieves precise response to uneven heat loads on the wireless charging module, providing a novel solution to the heat dissipation challenges in high heat flux density scenarios.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, specifically a blood-inspired intelligent microchannel heat dissipation system for a high-power electric vehicle wireless charging module. Background Technology

[0002] In recent years, with the rapid development of materials science, electromagnetics, and electronics, wireless charging technology for electric vehicles has been continuously advancing, and the performance and functionality of charging facilities have been constantly improving. To enhance user experience, the charging power of wireless charging devices for electric vehicles has increased from tens of kilowatts initially to hundreds of kilowatts now, and charging time has been shortened from tens of minutes to just over ten minutes or even less. During energy transfer, wireless charging systems for electric vehicles generate Joule heat and hysteresis losses, leading to temperature increases. Excessive temperatures not only reduce charging efficiency but may also damage electronic components.

[0003] Under such high heat flux density conditions, traditional air cooling and water cooling methods are difficult to efficiently extract heat from the surface of electronic devices and release it into the environment due to the limited heat flux density. Therefore, solving the heat dissipation problem of wireless charging modules for electric vehicles with high heat flux density has become a very urgent requirement.

[0004] Microchannel heat dissipation devices have shown unique advantages in the field of microelectronics due to their compact structure and efficient heat transfer characteristics, but existing designs still have significant limitations: their fixed heat exchange efficiency cannot dynamically match the real-time heat load changes of wireless charging modules. When charging power fluctuates or ambient temperature changes, traditional microchannel devices are unable to autonomously adjust their heat dissipation capacity, leading to local overheating or energy waste.

[0005] While adding temperature sensors and external energy field control systems can achieve some degree of heat dissipation optimization, this approach suffers from high system complexity and low reliability. Against this backdrop, developing an intelligent microchannel device capable of dynamically adjusting heat dissipation based on the thermal distribution of the charging module has become crucial for overcoming the bottlenecks in wireless charging technology. Utility Model Content

[0006] To address the aforementioned technical problems, this invention provides a blood-inspired intelligent microchannel heat dissipation system for high-power electric vehicle wireless charging modules. Drawing inspiration from the adaptive heat dissipation mechanism of the human circulatory system, and utilizing shape memory alloy materials, it achieves precise response to uneven heat loads on the wireless charging module, providing a novel solution to the heat dissipation challenges in high heat flux density scenarios.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a blood-inspired intelligent microchannel cooling system for a high-power electric vehicle wireless charging module, characterized in that it includes a microchannel cooling device, a coolant tank, an expansion valve, and a micro magnetic pump. The microchannel cooling device is attached to the surface of the electric vehicle wireless charging module. The microchannel cooling device includes a liquid working fluid inlet pipe, a liquid working fluid outlet pipe, and longitudinal and transversely arranged latitude and longitude pipes attached to the surface of the electric vehicle wireless charging module. The outlet pipeline and the warp and weft pipelines are all shape memory alloy pipelines, which are covered with an elastic film. The inlet end of all the warp and weft pipelines can be connected to the liquid working medium inlet pipeline to allow the liquid working medium to enter each warp and weft pipeline. At the same time, all the warp and weft pipelines are also connected to the liquid working medium outlet pipeline to allow the liquid working medium to exit. The liquid working medium inlet pipeline is connected to the coolant tank outlet pipeline, and an expansion valve is installed on the coolant tank outlet pipeline. The liquid working medium outlet pipeline is connected to the coolant tank inlet pipeline, and a miniature magnetic pump is installed on the coolant tank inlet pipeline.

[0008] The shape memory alloy material in the microchannel cooling device undergoes a martensitic phase transformation above a set temperature, reaching a high-temperature phase that drives the radial expansion of the channel, increasing its diameter. Below the set temperature, it reverts to a low-temperature phase, causing the channel to shrink and its diameter to decrease, thus controlling the flow rate. For example, the set temperature for the shape memory alloy material in the microchannel cooling device is 50℃ (the shape memory alloy material has been acclimated). The shape memory alloy channel is covered with an elastic film structure. This elastic film expands or contracts synchronously with the thermal deformation of the shape memory alloy, serving both as a sealing surface and a deformation conductor for the channel.

[0009] In the above scheme: the expansion valve is a wax-type expansion valve. A wax-type expansion valve, such as a paraffin wax expansion valve, uses the expansion force generated by the temperature-sensitive wax as it changes with temperature to regulate the fluid flow rate, and works in conjunction with the shape memory alloy to regulate flow distribution.

[0010] In the above scheme, the shape memory alloy pipe is one of nickel-titanium shape memory alloy pipe, copper-based shape memory alloy pipe, or iron-based shape memory alloy pipe. There are no restrictions on the material of the shape memory alloy; other commonly used shape memory alloy materials besides those mentioned above can also be used in this invention.

[0011] In the above scheme, the liquid working fluid is a nanofluid.

[0012] Specifically, the nanofluid is one of Al2O3, SiO2, TiO2, ZnO, or Fe3O4 nanofluids. The mass fraction of nanoparticles in the nanofluid is 1%-2%. The choice of nanoparticles and base liquid is not limited; common nanoparticles such as Al2O3, SiO2, TiO2, ZnO, and Fe3O4 are all acceptable, and base liquids such as water and ethylene glycol can also be used in this invention.

[0013] Compared with existing technologies, this invention has the following advantages: the liquid working fluid flows into the microchannel cooling device and then out, achieving cooling of the wireless charging module for electric vehicles. Borrowing from the adaptive heat dissipation mechanism of the human circulatory system, shape memory alloy materials are used to achieve adaptive cooling of the wireless charging module's temperature. When the temperature is high, the pipes made of shape memory alloy expand radially, increasing the flow rate of the nanofluid and achieving better heat dissipation, thus realizing adaptive flow adjustment. The structure is simple and the design is reasonable, providing a novel solution to the heat dissipation problem in high heat flux density scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the blood-inspired intelligent microchannel heat dissipation system for the high-power electric vehicle wireless charging module described in this invention.

[0015] Figure 2 This is a perspective view of the microchannel cooling device of the blood-inspired intelligent microchannel heat dissipation system for high-power electric vehicle wireless charging modules according to the present invention.

[0016] Figure 3 This is a schematic cross-sectional view of the shape memory alloy pipe in the blood-inspired intelligent microchannel heat dissipation system for high-power electric vehicle wireless charging modules described in this invention.

[0017] Figure 4 This is a schematic diagram of the shape memory alloy pipe of the blood-inspired intelligent microchannel heat dissipation system for high-power electric vehicle wireless charging modules according to the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example 1

[0020] like Figure 1-4 As shown, the high-power electric vehicle wireless charging module's blood-inspired intelligent microchannel cooling system consists of a microchannel cooling device 2, a coolant tank 6, an expansion valve 8, and a miniature magnetic pump 7. The microchannel cooling device is attached to the surface of the electric vehicle wireless charging module 1. Specifically, as shown... Figure 2As shown, the electric vehicle wireless charging module 1 is located within the microchannel cooling device 2. The microchannel cooling device includes a liquid working fluid inlet pipeline, a liquid working fluid outlet pipeline, and longitudinal and transversely arranged latitude and longitude pipes distributed on the surface of the electric vehicle wireless charging module, such as... Figure 3 As shown, the liquid working medium inlet pipe is located at the bottom, and the liquid working medium outlet pipe is located at the top. The warp and weft pipes are attached to the outer wall of the electric vehicle wireless charging module 1. All three pipes—the liquid working medium inlet pipe, the liquid working medium outlet pipe, and the warp and weft pipes—are shape memory alloy pipes 3. The shape memory alloy material, after being trained, undergoes a martensitic phase transformation above a set temperature, reaching a high-temperature phase morphology, driving the pipe to expand radially and increase its diameter. Below the set temperature, it reverts to a low-temperature phase morphology, causing the pipe to shrink and its diameter to decrease, thus controlling the flow rate. There are no restrictions on the shape memory alloy material; commonly used shape memory alloy materials, such as nickel-titanium shape memory alloys, copper-based shape memory alloys, and iron-based shape memory alloys, can be used in this invention.

[0021] The working fluid 5 is a nanofluid, such as one of Al2O3, SiO2, TiO2, ZnO, or Fe3O4 nanofluids. Other nanofluids can also be selected. The mass fraction of nanoparticles in the nanofluid is 1%-2%. The base fluid is one of water, ethylene glycol, etc.

[0022] The shape memory alloy pipe is covered with an elastic film 4. This film can expand or contract synchronously with the thermal deformation of the shape memory alloy, and has the functions of sealing the pipe wall and conducting deformation.

[0023] like Figure 2 As shown, the inlet end of the longitudinal and transverse pipelines can be connected to the liquid working medium inlet pipeline, allowing the liquid working medium to enter each longitudinal and transverse pipeline. Simultaneously, all longitudinal and transverse pipelines are also connected to the liquid working medium outlet pipeline, allowing the liquid working medium to exit. The liquid working medium inlet pipeline is connected to the coolant tank outlet pipeline, and an expansion valve 8 is installed on the coolant tank outlet pipeline. Specifically, the expansion valve is a wax-type expansion valve. The liquid working medium outlet pipeline is connected to the coolant tank inlet pipeline, and a miniature magnetic pump 7 is installed on the coolant tank inlet pipeline.

[0024] The liquid working fluid flows into the microchannel cooling device and then out, cooling the wireless charging module of the electric vehicle. After flowing out, the liquid working fluid enters the coolant tank 6 for further cooling. The coolant tank 6 can be any container capable of storing and cooling the liquid working fluid. This is existing technology and will not be described in detail here.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-power electric vehicle wireless charging module imitates blood intelligent micro-channel heat dissipation system, characterized by: The device includes a microchannel cooling system, a coolant tank, an expansion valve, and a micro magnetic pump. The microchannel cooling system is attached to the surface of an electric vehicle wireless charging module. The microchannel cooling system includes a liquid working fluid inlet pipe, a liquid working fluid outlet pipe, and longitudinal and transversely arranged concentric tubes attached to the surface of the electric vehicle wireless charging module. The liquid working fluid inlet pipe, liquid working fluid outlet pipe, and concentric tubes are all shape memory alloy pipes, each covered with an elastic film. The inlet ends of all concentric tubes are connected to the liquid working fluid inlet pipe, allowing the liquid working fluid to enter each concentric tube. Simultaneously, all concentric tubes are also connected to the liquid working fluid outlet pipe, allowing the liquid working fluid to exit. The liquid working fluid inlet pipe is connected to the coolant tank outlet pipe, and an expansion valve is installed on the coolant tank outlet pipe. The liquid working fluid outlet pipe is connected to the coolant tank inlet pipe, and a micro magnetic pump is installed on the coolant tank inlet pipe.

2. The blood-inspired intelligent microchannel heat dissipation system for high-power electric vehicle wireless charging modules according to claim 1, characterized in that: The expansion valve is a wax-type expansion valve.

3. The blood-inspired intelligent microchannel heat dissipation system for high-power electric vehicle wireless charging modules according to claim 1 or 2, characterized in that: The shape memory alloy pipe is one of nickel-titanium shape memory alloy pipe, copper-based shape memory alloy pipe, and iron-based shape memory alloy pipe.

4. The blood-inspired intelligent microchannel heat dissipation system for wireless charging modules of power electric vehicles according to claim 3, characterized in that: The liquid working fluid is a nanofluid.

5. The blood-inspired intelligent microchannel heat dissipation system for wireless charging modules of power electric vehicles according to claim 4, characterized in that: The nanofluid is one of Al2O3, SiO2, TiO2, ZnO, or Fe3O4 nanofluids.

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