Waste heat recovery system of liquid cooling mobile fast charging equipment based on thermoelectric power generation

Abstract

The invention discloses a waste heat recovery system of a liquid cooling mobile fast charging device based on thermoelectric power generation, the liquid cooling mobile fast charging device comprises a liquid cooling assembly, a heat conduction piece, a heat collection piece and a thermoelectric power generation piece, an auxiliary cooling loop is connected with a power supply piece and a power assembly, the hot end of the thermoelectric power generation piece is connected with the heat collection piece, and the cold end of the thermoelectric power generation piece is connected with a main path cooling plate; the waste heat recovery system comprises a control module, a temperature detection module, a flow adjusting module and a heat determining unit, the temperature detection module obtains temperature information, the heat determining unit determines the heat dissipating capacity and the temperature difference value, and the control module controls the flow adjusting module according to the heat dissipating capacity and the temperature difference value. And the flow adjusting module is controlled to adjust the cooling liquid flow of the auxiliary cooling loop and the main cooling loop. The invention provides a waste heat recovery system of liquid cooling mobile fast charging equipment based on thermoelectric power generation, and aims to solve the technical problem that the working stability of a mobile fast charging device is affected due to imbalance of two working types of heat recovery and temperature control of a power supply part and a power assembly.

Description

Technical Field

[0001] This application belongs to the field of mobile fast charging equipment technology, specifically relating to a waste heat recovery system for a liquid-cooled mobile fast charging equipment based on thermoelectric power generation. Background Technology

[0002] Mobile fast charging devices, due to their core advantage of flexible energy replenishment, have been widely used for charging electric vehicles and other vehicles waiting to be charged. These devices consist of a power supply unit and a power assembly. The power supply unit stores and outputs electrical energy, while the power assembly comprises a charging device and a discharging device. During actual charge-discharge cycles, due to factors such as internal resistance losses during energy conversion and high-frequency switching losses of the switching transistors, the power supply unit and power assembly continuously release a large amount of heat. This not only reduces the charging efficiency of the device but also accelerates the aging of internal components and shortens their lifespan. To address this issue, existing technologies introduce liquid cooling modules. By tightly fitting a liquid cooling plate to the heat-generating components, the circulating flow of coolant removes heat, maintaining the power supply unit and power assembly within their normal operating temperature range. However, this solution only achieves heat transfer and does not effectively utilize the generated heat energy. The heat absorbed by the coolant is ultimately discharged into the air through a cooling fan, resulting in significant energy waste.

[0003] To address the aforementioned heat waste issue, an improved scheme involving thermoelectric generators is proposed: the hot end of the thermoelectric generator is directly attached to the bottom of the power supply unit, while the cold end is tightly connected to the liquid cooling plate of the liquid cooling module. Utilizing the temperature difference between the high temperature generated by the power supply unit during operation and the low temperature maintained by the liquid cooling plate, the thermoelectric generator is driven to convert heat energy into electrical energy based on the Seebeck effect. The generated electrical energy can be fed back to the energy storage unit of the power supply unit, thereby achieving energy recovery and reducing waste. However, this improved scheme fails to cover the thermal management of the power component. As another core heat source in mobile fast charging devices, the power component has a higher local temperature and greater heat flux density. Existing solutions only combine the thermoelectric generator with the power supply unit, completely neglecting the heat utilization and temperature control requirements of the power component. The heat generated by the power component still relies on the liquid cooling module for separate heat dissipation, leading to not only the waste of this heat energy but also increasing the heat dissipation load on the liquid cooling module, causing local overheating of the liquid cooling system and affecting the overall temperature control effect. Furthermore, the power generation efficiency of the thermoelectric generator is highly dependent on the temperature difference between the hot and cold ends; the greater the temperature difference, the higher the power generation efficiency. However, the core objective of liquid cooling modules is to quickly reduce the temperature of heat-generating components and keep them within a safe range. Intentionally increasing the temperature of the hot end to improve the efficiency of thermoelectric power generation causes the temperature of the power components to exceed the safe threshold, resulting in an imbalance between the two working modes of energy recovery and temperature control of the power components and power modules, which affects the working stability of mobile fast charging devices. Summary of the Invention

[0004] This application provides a waste heat recovery system for liquid-cooled mobile fast charging equipment based on thermoelectric power generation, in order to solve the technical problem of imbalance between the heat recovery and temperature control of power components and power modules in existing mobile fast charging equipment, which affects the working stability of the mobile fast charging device.

[0005] This application provides a waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation. The technical solution adopted is as follows: The liquid-cooled mobile fast charging device includes a power supply component, a power assembly, and a thermal management structure. The thermal management structure includes a liquid cooling component and a thermoelectric generator component. The thermoelectric generator component includes a heat-conducting component, a heat-collecting component, and a thermoelectric generator. The heat-conducting component is used to conduct heat from the power supply component and the power assembly to the heat-collecting component. The liquid cooling component includes a main cooling circuit and an auxiliary cooling circuit. The main cooling circuit is connected to the main cooling plate, and the auxiliary cooling circuit is connected to the power supply component and the power assembly. The hot end of the thermoelectric generator is thermally connected to the heat output surface of the heat-collecting component, and its cold end is thermally connected to the main cooling plate. The waste heat recovery system includes a control module, a temperature detection module, a flow regulation module, and a heat determination unit. The temperature detection module is configured to acquire temperature information of the hot and cold ends of the power supply components, power modules, and thermoelectric generators. Based on the temperature information, the heat determination unit determines the heat dissipation of the power supply components and power modules, as well as the temperature difference between the hot and cold ends of the thermoelectric generators. According to the heat dissipation and temperature difference, the control module controls the flow regulation module to adjust the coolant flow of the auxiliary cooling circuit and the main cooling circuit respectively, so as to maintain the temperature difference within the power generation efficiency range and control the temperature of the power supply components and power modules.

[0006] The waste heat recovery system for liquid-cooled mobile fast charging equipment based on thermoelectric power generation in this application also includes the following additional technical features: Multiple heat-conducting components are provided, which are divided into a first heat-conducting component for conducting heat of the power supply component and a second heat-conducting component for conducting heat of the power assembly. The power supply component includes a first heat dissipation area and a second heat dissipation area. One end of the first heat-conducting component is thermally connected to the first heat dissipation area, and the other end is connected to the first heat receiving area of ​​the heat collector. The power assembly has a first contact area and a second contact area. One end of the second heat-conducting component is thermally connected to the first contact area of ​​the power assembly, and the other end is connected to the second heat receiving area of ​​the heat collector. The cooling pipes of the auxiliary cooling circuit are respectively attached to the second heat dissipation area and the second contact area through heat dissipation plates.

[0007] The heat collection element includes a protrusion, a first heat receiving area and a second heat receiving area are symmetrically distributed on both sides of the protrusion, and a heat output surface is provided on the top of the protrusion.

[0008] The heat-conducting component includes a condensing section, an evaporating section in contact with the heat source, and a transition section connecting the evaporating section and the condensing section. The transition section is provided with a guiding channel and a diversion channel. The heat-conducting component is provided with a heat-conducting medium. The heat-conducting medium evaporates in the evaporating section, enters the condensing section through the guiding channel, condenses, and flows back to the evaporating section through the diversion channel. The condensing section of the first heat-conducting component is connected to the first heat receiving area, and the condensing section of the second heat-conducting component is connected to the second heat receiving area.

[0009] The lowest end face of the condensation section is higher than the highest end face of the evaporation section.

[0010] The auxiliary cooling pipeline also includes a first bypass pipeline and a second bypass pipeline. The first bypass pipeline surrounds the first heat dissipation area, and the second bypass pipeline surrounds the first contact area. The temperature detection module detects the temperature of the first heat dissipation area and the temperature of the first contact area. The control module controls the flow regulation module according to the temperature of the first heat dissipation area and the first contact area, so that the corresponding coolant flows to the first bypass pipeline and the second bypass pipeline.

[0011] The waste heat recovery system also includes an energy storage unit and a charge / discharge module. The thermoelectric generator is electrically connected to the energy storage unit through the charge / discharge module, and the thermoelectric generator stores electrical energy in the energy storage unit through the charge / discharge module.

[0012] The control module acquires the power information of the energy storage unit. Based on the power information, the control module controls the flow regulation module to adjust the flow of the main cooling circuit in order to adjust the power generation of the thermoelectric generator.

[0013] The power generation efficiency range includes a lower efficiency threshold and an upper efficiency threshold. The control module determines the operating type based on the temperature information of the power supply components, the temperature information of the power modules, and the temperature difference. The specific determination logic is as follows: Priority power generation mode determination: When the temperature difference is within the power generation efficiency range, and the temperature of the power supply component is less than or equal to the first set temperature, and the temperature of the power module is less than or equal to the second set temperature, the operating type is determined to be priority power generation mode. Priority heat dissipation mode determination: When the temperature of the power supply component is greater than the first set temperature or the temperature of the power component is greater than the second set temperature, the working type is determined to be priority heat dissipation mode. Collaborative mode determination: When the temperature difference is less than the efficiency lower limit threshold, the temperature of the power supply component is less than or equal to the first set temperature and the temperature of the power component is less than or equal to the second set temperature, the working type is determined to be collaborative mode. The control module adjusts the coolant flow rate of the main cooling circuit and the auxiliary cooling circuit accordingly, based on the working type.

[0014] The operating mode is priority power generation mode. The control module controls the flow regulation module to adjust the coolant flow rate of the main cooling circuit to the insulation difference flow rate so that the temperature difference is within the power generation efficiency range. The control module controls the flow regulation module to adjust the coolant flow rate of the auxiliary cooling circuit to the basic heat dissipation flow rate so that the temperature of the power supply components is less than or equal to the first set temperature and the temperature of the power components is less than or equal to the second set temperature.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. This application utilizes a collaborative design of heat-conducting and heat-collecting components to synchronously transfer heat from the power supply components and power modules to the hot end of the thermoelectric generator, achieving dual-heat source waste heat recovery. The heat-collecting component further gathers and homogenizes the dispersed heat transferred by the heat-conducting components, preventing local temperature fluctuations at the hot end of the thermoelectric generator due to uneven heat distribution, ensuring a stable and continuous hot end temperature, thereby improving energy utilization. Simultaneously, the auxiliary cooling circuit focuses on ensuring the temperature control safety of the power supply components and power modules, ensuring they remain within a safe operating temperature range. The main cooling circuit stabilizes the cold end temperature of the thermoelectric generator, providing a continuous temperature difference for thermoelectric power generation. The temperature detection module captures real-time temperature changes at the hot and cold ends of the power supply components, power modules, and thermoelectric generators, providing data for the control module's regulation. The heat determination unit analyzes heat dissipation and temperature difference based on temperature information to determine whether adjustment is needed and the direction of adjustment. The control module controls the flow regulation module based on the analysis results to make differentiated adjustments to the coolant flow rates of the main cooling circuit and auxiliary circuit. Ultimately, this achieves comprehensive regulation of temperature control and power generation efficiency, ensuring the power generation efficiency of the thermoelectric generator while guaranteeing the normal operation of the power supply components and power modules. This ensures the equipment's continuous and stable power output, reduces the equipment's dependence on external power supply, and extends its operating time.

[0016] 2. In a preferred embodiment of this application, the first heat-conducting element corresponds to the first heat dissipation area of ​​the power supply component, and the second heat-conducting element corresponds to the first contact area of ​​the power component. This avoids the problem of heat crossflow or uneven conduction paths that may occur when a single heat-conducting element covers different heat sources simultaneously. It allows for closer contact between the heat-conducting element and the heat source, significantly reducing heat loss during conduction, improving the heat transfer efficiency of the dual heat sources, ensuring that more heat can be collected by the heat collector and transferred to the hot end of the thermoelectric generator, further increasing the total amount of waste heat recovery. The first heat-conducting element corresponds to the first heat receiving area of ​​the heat collector, and the second heat-conducting element corresponds to the second heat receiving area of ​​the heat collector. The first and second heat-conducting elements respectively introduce heat into different areas of the heat collector, and then achieve overall heat balance through the heat-dissipating characteristics of the heat collector. This makes the overall temperature distribution of the heat collector more uniform, ensuring that the temperature of each area of ​​the hot end of the thermoelectric generator is consistent, enabling the thermoelectric generator to generate electricity stably.

[0017] 3. As a preferred embodiment of this application, the top of the protrusion is provided with a heat output surface, so that the heat dispersed in the first and second heat receiving areas is directionally conducted to the protrusion through the heat collector body, forming a stepped heat flow path of bottom receiving, middle gathering and top output, reducing the lateral diffusion loss of heat inside the heat collector, allowing the heat from the two heat sources to gather more efficiently to the top of the protrusion, significantly improving the temperature concentration of the heat output surface, ensuring that the hot end of the thermoelectric generator receives more heat input, and providing a basis for maintaining a stable temperature difference.

[0018] 4. In a preferred embodiment of this application, the evaporation section is in direct contact with the heat source (the first heat dissipation area of ​​the power supply component or the first contact area of ​​the power component). The heat from the heat source causes the heat-conducting medium to evaporate rapidly, absorbing a large amount of heat energy. The gaseous heat-conducting medium flows to the condensation section through the guide channel, where it releases heat energy and condenses into a liquid state in contact with the heat collector. The liquid heat-conducting medium then flows back to the evaporation section through the guide channel to complete the cycle, improving the heat conduction efficiency. It can transfer more heat under the same temperature difference, solving the problem of the heat source's heat being difficult to remove quickly in high-power scenarios, and ensuring that the heat from the dual heat sources is efficiently transferred to the heat collector.

[0019] Furthermore, by setting the lowest end face of the condensation section higher than the highest end face of the evaporation section, the condensed liquid medium can flow naturally downwards along the drainage channel under the action of gravity and quickly return to the evaporation section, reducing the resistance to the return of the liquid medium and avoiding a shortage of medium in the evaporation section due to poor return flow. At the same time, the path of the gaseous medium flowing from the evaporation section to the condensation section is consistent with its own upward floating trend, and it does not need to overcome gravity to flow in the opposite direction, which greatly reduces the flow resistance of the gaseous heat-conducting medium.

[0020] 5. As a preferred embodiment of this application, by setting a first bypass pipe and a second bypass pipe, when the temperature of the power supply component and / or power assembly is too high, the control module drives the flow regulation module to guide the coolant to the first bypass pipe and / or the second bypass pipe. The first and second bypass pipes form a ring-shaped enveloping heat dissipation for the first heat dissipation area and the first contact area, respectively, which can deliver the coolant more directly and centrally to the abnormal temperature area, significantly shortening the heat dissipation response time and ensuring temperature control of the power supply component and power assembly. When the temperature of the power supply component is normal, the first bypass pipe is idle, reducing the power consumption of the cooling assembly. When the temperature of the power assembly is normal, the second bypass pipe is idle, further reducing the power consumption of the cooling assembly. The first bypass pipe quickly suppresses overheating of the first heat dissipation area, improves the heat dissipation capacity of the power supply component, and at the same time maintains the heat transferred from the first heat dissipation area to the heat collector, maintaining the stable power generation efficiency of the thermoelectric generator. The second bypass pipeline quickly suppresses overheating of the first contact area, improves the heat dissipation capacity of the power components, and maintains the heat transfer from the first contact area to the heat collector, ensuring stable power generation efficiency of the thermoelectric generator. This eliminates the need to adjust the main cooling circuit to maintain the temperature difference, ensuring power generation efficiency while protecting the power supply components and power modules at their normal operating temperature.

[0021] 6. As a preferred embodiment of this application, the energy storage unit can store the electrical energy generated by the thermoelectric generator, allowing for more efficient utilization of waste heat resources. The charge and discharge management module can precisely control the charging and discharging process of the energy storage unit, ensuring stable performance of the energy storage unit.

[0022] Furthermore, by adjusting the flow rate of the main cooling circuit based on the power information through the control module, precise regulation can be made based on the energy storage status of the energy storage unit, so that the power generation of the thermoelectric generator matches the energy storage demand. This ensures the targeted nature of power recovery and avoids unnecessary energy consumption of the main cooling circuit and thermoelectric generator, optimizing the comprehensive balance between power generation efficiency and energy storage utilization, and enhancing the intelligence and economy of the entire waste heat recovery system.

[0023] 7. As a preferred embodiment of this application, the control module determines the working type based on the temperature information of the power supply components, the temperature information of the power components, and the temperature difference, so that the waste heat recovery system can adapt to the liquid-cooled mobile fast charging equipment under different working conditions, and make reasonable allocations for power generation efficiency and temperature control, thereby improving the applicability of the waste heat recovery system and improving the working stability of the liquid-cooled mobile fast charging equipment.

[0024] Furthermore, in the priority power generation mode, by adjusting the coolant flow rate of the main cooling circuit to the thermal difference flow rate, the temperature difference is kept within the power generation efficiency range, ensuring the power generation efficiency of the thermoelectric generator. By adjusting the coolant flow rate of the auxiliary cooling circuit to the basic heat dissipation flow rate, the temperature of the power supply components and power modules is regulated while ensuring power generation efficiency, so that the power supply components and power modules can operate stably. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a front view of a liquid-cooled mobile fast charging device according to one embodiment of this application; Figure 2 This is a left view of a liquid-cooled mobile fast charging device according to one embodiment of this application; Figure 3 This is a right view of a liquid-cooled mobile fast charging device according to one embodiment of this application; Figure 4 This is an isometric view of a liquid-cooled mobile fast-charging device according to one embodiment of this application; Figure 5 This is a schematic diagram of the structure of the heat-conducting component according to one embodiment of this application; Figure 6 This is a schematic diagram of the electrical connections of the temperature detection module, heat determination unit, control module, and flow regulation module according to one embodiment of this application.

[0026] List of components and reference numerals: 1. Power supply component; 11. First heat dissipation area; 12. Second heat dissipation area; 2. Power component; 21. First contact area; 22. Second contact area; 3. Liquid cooling assembly; 31. Main cooling circuit; 32. Auxiliary cooling circuit; 321. First bypass piping; 33. Main cooling plate; 34. Heat dissipation plate; 4. Thermoelectric generator assembly; 41. Heat-conducting component; 411. Evaporation section; 4111. Receptacle; 4112. Liquid inlet; 4113. Gas outlet; 412. Condensation section; 4121. Reflux chamber; 4122. Gas inlet; 4123. Gas guide; 4124. Flow guide; 4125. Flow guide hole; 413. Transition section; 414. Guide channel; 415. Flow channel; 42. Heat collector; 421. Protrusion; 422. Heat output surface; 423. First heat receiving area; 424. Second heat receiving area; 43. Thermoelectric generator; 431. Hot end; 432. Cold end; 5. Temperature detection module; 6. Heat determination unit; 7. Control module; 8. Flow regulation module. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0029] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, a waste heat recovery system for a liquid-cooled mobile fast charging device based on thermoelectric power generation is characterized in that the liquid-cooled mobile fast charging device includes a power supply component 1, a power component 2, and a thermal management structure. The thermal management structure includes a liquid-cooled component 3 and a thermoelectric power generation component 4. The thermoelectric power generation component 4 includes a heat-conducting component 41, a heat-collecting component 42, and a thermoelectric power generation component 43. The heat-conducting component 41 is used to conduct heat from the power supply component 1 and the power component 2 to the heat-collecting component 42. The liquid-cooled component 3 includes a main cooling circuit 31 and an auxiliary cooling circuit 32. The main cooling circuit 31 is connected to a main cooling plate 33, and the auxiliary cooling circuit 32 is connected to the power supply component 1 and the power component 2. The hot end 431 of the thermoelectric power generation component 43 is thermally connected to the heat output surface 422 of the heat-collecting component 42, and its cold end 432 is thermally connected to the main cooling plate 33. The waste heat recovery system includes a control module 7, a temperature detection module 5, a flow regulation module 8, and a heat determination unit 6. The temperature detection module 5 is configured to acquire the temperature information of the hot end 431 and cold end 432 of the power supply component 1, the power component 2, and the thermoelectric generator 43. Based on the temperature information, the heat determination unit 6 determines the heat dissipation of the power supply component 1 and the power component 2, as well as the temperature difference between the hot end 431 and the cold end 432 of the thermoelectric generator 43. The control module 7 controls the flow regulation module 8 to adjust the coolant flow rate of the auxiliary cooling circuit 32 and the main cooling circuit 31 according to the heat dissipation and the temperature difference, so as to maintain the temperature difference within the power generation efficiency range and control the temperature of the power supply component 1 and the power component 2.

[0031] This application utilizes the coordinated design of the heat-conducting component 41 and the heat-collecting component 42 to synchronously transfer the heat from the power supply component 1 and the power assembly 2 to the hot end 431 of the thermoelectric generator 43, achieving dual-heat source waste heat recovery. The heat-collecting component 42 further gathers and homogenizes the dispersed heat transferred by the heat-conducting component 41, avoiding local temperature fluctuations at the hot end 431 of the thermoelectric generator 43 due to uneven heat distribution, ensuring a stable and continuous temperature at the hot end 431, thereby improving energy utilization. Simultaneously, the auxiliary cooling circuit 32 focuses on ensuring the temperature control safety of the power supply component 1 and the power assembly 2, ensuring that the power supply component 1 and the power assembly 2 are always within a safe operating temperature range. The main cooling circuit 31 stabilizes the temperature of the cold end 432 of the thermoelectric generator 43, providing continuous temperature difference conditions for thermoelectric power generation. Temperature detection module 5 captures the temperature changes of the hot and cold ends 431 of power supply component 1, power component 2, and thermoelectric generator 43 in real time, providing data basis for the regulation of control module 7; heat determination unit 6 analyzes heat dissipation and temperature difference based on temperature information to determine whether adjustment is needed and the direction of adjustment; control module 7 controls flow regulation module 8 according to the analysis results to make differentiated adjustments to the coolant flow of the main cooling circuit 31 and the auxiliary circuit, ultimately achieving comprehensive regulation of temperature control and power generation efficiency. Under the premise of ensuring the normal operation of power supply component 1 and power component 2, it ensures the power generation efficiency of thermoelectric generator 43, ensures the continuous and stable output power of the equipment, reduces the equipment's dependence on external power supply, and extends the endurance.

[0032] Those skilled in the art will understand that the safe operating temperature range refers to the operating temperature range set by the manufacturer for power supply components and power modules. Within the operating temperature range, the power supply components and power modules can operate normally. At the same time, the operating temperature ranges of power supply components and power modules can be the same or different.

[0033] Furthermore, the liquid-cooled mobile fast charging device includes a main body (not shown in the attached diagram), which has a receiving cavity (not shown in the attached diagram). The power supply unit 1, power assembly 2, and thermal management structure are installed in the receiving cavity. A moving device (not shown in the attached diagram) is installed at the bottom of the main body to allow free movement of the main body. A charging connector (not shown in the attached diagram) and an operation hole (not shown in the attached diagram) are provided on the main body corresponding to the position of the power assembly 22. The power assembly 22 is connected to the charging connector and also to a charging gun (not shown in the attached diagram). The charging gun can extend from the operation hole. The main body also has an operation door (not shown in the attached diagram), which has a closed state (closing the operation hole) and a charging state (at least partially exposing the operation hole). In the charging state, the charging gun extends from the operation hole to charge the object to be charged.

[0034] As one of the preferred embodiments of this application, such as Figure 1 , Figure 2 , Figure 3 As shown, multiple heat-conducting components 41 are provided. These multiple heat-conducting components 41 are divided into first heat-conducting components 41 for conducting heat of power supply component 1 and second heat-conducting components 41 for conducting heat of power component 2. Power supply component 1 includes a first heat dissipation area 11 and a second heat dissipation area 12. One end of the first heat-conducting component 41 is thermally connected to the first heat dissipation area 11, and the other end is connected to the first heat receiving area 423 of heat collector 42. Power component 2 is provided with a first contact area 21 and a second contact area 22. One end of the second heat-conducting component 41 is thermally connected to the first contact area 21 of power component 2, and the other end is connected to the second heat receiving area 424 of heat collector 42. The cooling pipes of auxiliary cooling circuit 32 are respectively attached to the second heat dissipation area 12 and the second contact area 22 through heat dissipation plate 34.

[0035] The first heat-conducting element 41 corresponds to the first heat dissipation area 11 of the power supply component 1, and the second heat-conducting element 41 corresponds to the first contact area 21 of the power component 2. This avoids the problem of heat crossflow or uneven conduction paths that may occur when a single heat-conducting element 41 covers different heat sources at the same time. It allows the heat-conducting element 41 to have a closer contact with the heat source, greatly reducing heat loss during conduction, improving the heat transfer efficiency of the dual heat sources, and ensuring that more heat can be collected by the heat collector 42 and transferred to the hot end 431 of the thermoelectric generator 43, further increasing the total amount of waste heat recovery. The first heat-conducting element 41 corresponds to the first heat receiving area 423 of the heat collector 42, and the second heat-conducting element 41 corresponds to the second heat receiving area 424 of the heat collector 42. The first heat-conducting element 41 and the second heat-conducting element 41 respectively introduce heat into different areas of the heat collector 42, and then achieve overall heat balance through the heat uniformity characteristics of the heat collector 42. This makes the overall temperature distribution of the heat collector 42 more uniform, ensuring that the temperature of each area of ​​the hot end 431 of the thermoelectric generator 43 is consistent, and enabling the thermoelectric generator 43 to generate electricity stably.

[0036] Those skilled in the art will understand that the first heat dissipation area 11 and the second heat dissipation area 12 are connected to a heat spreader plate, which contacts multiple heat sources of the power supply component 1, and the heat spreader plate evenly distributes heat between the two heat dissipation areas 11 and 12. The arrangement of the first contact area 21 and the second contact area 22 is the same as that of the first heat dissipation area 11 and the second heat dissipation area 12.

[0037] In embodiment one, the method of setting the heat collector 42 can be any one of the following embodiments: Example 1: As Figure 1 , Figure 2 , Figure 3 As shown, the heat collector 42 includes a protrusion 421, a first heat receiving area 423 and a second heat receiving area 424 symmetrically distributed on both sides of the protrusion 421, and a heat output surface 422 is provided on the top of the protrusion 421.

[0038] The top of the protrusion 421 is provided with a heat output surface 422, which allows the heat dispersed in the first and second heat receiving areas 424 to be directionally conducted to the protrusion 421 through the body of the heat collector 42, forming a stepped heat flow path of bottom receiving, middle gathering and top output. This reduces the lateral diffusion loss of heat inside the heat collector 42, and allows the heat from the two heat sources to be more efficiently gathered to the top of the protrusion 421, significantly improving the temperature concentration of the heat output surface 422. This ensures that the hot end 431 of the thermoelectric generator 43 receives more heat input, providing a basis for maintaining a stable temperature difference.

[0039] Example 2: This example 2 is not shown in the figure. The heat collection component includes a connecting plate, which is disposed above the first heat receiving area and the second heat receiving area. The top surface of the connecting plate is the heat output surface.

[0040] As a preferred specific example under Embodiment 1, such as Figure 1 , Figure 2 , Figure 3 , Figure 5As shown, the heat-conducting component 41 includes a condensing section 412, an evaporating section 411 in contact with the heat source, and a transition section 413 connecting the evaporating section 411 and the condensing section 412. The transition section 413 is provided with a guiding channel 414 and a flow channel 415. The heat-conducting component 41 is provided with a heat-conducting medium. The heat-conducting medium evaporates in the evaporating section 411, enters the condensing section 412 through the guiding channel 414 to condense, and flows back to the evaporating section 411 through the flow channel 415. The condensing section 412 of the first heat-conducting component 41 is connected to the first heat receiving area 423, and the condensing section 412 of the second heat-conducting component 41 is connected to the second heat receiving area 424. Preferably, the heat-conducting component 41 also includes an insulation component covering the transition section 413. The condensation section 412 is provided with a reflux chamber 4121. The bottom center of the reflux chamber 4121 is provided with an air inlet 4122 that connects to the guide channel 414. The bottom of the reflux chamber 4121 is provided with a drainage hole 4125 that connects to the drainage channel 415. The reflux chamber 4121 is also provided with a guide component 4123 that covers the air inlet 4122. The guide component 4123 is hollow. The drainage hole 4125 is provided on the outside of the guide component 4123. The evaporation section 411 includes a accommodating cavity 4111. The heat dissipation medium is provided in the accommodating cavity 4111. The top of the accommodating cavity 4111 is provided with an air outlet 4113 that connects to the guide channel 414. The accommodating cavity 4111 is provided with multiple liquid inlet holes 4112 that connect to the drainage channel 415 around the air outlet 4113. A guide element 4124 is provided at the top of the return cavity 4121 corresponding to the air inlet 4122, and a counterflow valve is provided at the liquid inlet 4112, allowing the heat dissipation medium to enter the receiving cavity 4111 unidirectionally through the liquid inlet 4112. Furthermore, the first heat receiving zone 423 and the second heat receiving zone 424 are provided with an expansion cavity communicating with the return cavity 4121. The precipitated heat dissipation medium enters the return cavity 4121 through the air inlet 4122 and condenses in the expansion cavity, allowing the first heat receiving zone 423 and the second heat receiving zone 424 to absorb heat more directly. The guide channel 414 is located at the center of the transition section 413, the guide channel 415 is an annular channel surrounding the guide channel 414, and the air outlet 4113 is a flared design, with the larger opening facing the receiving cavity 4111 and communicating with it, and the smaller opening cooperating with the guide channel 414. The guide member 4124 is located above the air inlet 4122 and is disposed on the top wall of the return cavity 4121. The guide member 4124 extends downward and outward from the guide member 4123 to prevent the condensed heat dissipation medium from falling into the guide channel 414 and guides it into the guide hole 4125 on the outside of the guide member 4123. Preferably, the upper part of the guide member 4123 is also provided with multiple vent holes.

[0041] The evaporation section 411 is in direct contact with the heat source (the first heat dissipation area 11 of the power supply component 1 or the first contact area 21 of the power component 2). The heat from the heat source causes the heat transfer medium to evaporate rapidly, absorbing a large amount of heat energy. The gaseous heat transfer medium flows to the condensation section 412 through the guide channel 414, where it releases heat energy and condenses into a liquid state in contact with the heat collector 42. The liquid heat transfer medium then flows back to the evaporation section 411 through the guide channel 415, completing the cycle and improving the heat transfer efficiency. This allows for the transfer of more heat under the same temperature difference, solving the problem of the heat source's inability to quickly remove heat in high-power scenarios and ensuring that the heat from both heat sources is efficiently transferred to the heat collector 42. The heat dissipation medium is an ethylene glycol-water mixed coolant.

[0042] Furthermore, such as Figure 1 , Figure 3 As shown, the lowest end face of the condensing section 412 is higher than the highest end face of the evaporating section 411. The liquid-cooled mobile fast charging device has a receiving cavity, in which the power supply component 1, power assembly 2, and thermal management structure are all housed. The liquid cooling assembly 3 and the thermoelectric generator 43 are positioned above the power supply component 1 and power assembly 2. By setting the lowest end face of the condensing section 412 higher than the highest end face of the evaporating section 411, the condensed liquid medium can flow naturally downwards along the drainage channel 415 under the action of gravity and quickly return to the evaporating section 411, reducing the resistance of the liquid medium's return flow and avoiding a shortage of medium in the evaporating section 411 due to poor return flow. At the same time, the path of the gaseous medium flowing from the evaporating section 411 to the condensing section 412 is consistent with its own upward floating trend, eliminating the need to overcome gravity and flowing in the opposite direction, significantly reducing the flow resistance of the gaseous heat-conducting medium.

[0043] In the first embodiment, the temperature control of the first heat dissipation area 11 and the first contact area 21 can be any one of the following embodiments: Example 3: The auxiliary cooling pipeline also includes a first bypass pipeline 321 and a second bypass pipeline (not shown in the figure). The first bypass pipeline 321 surrounds the first heat dissipation area 11, and the second bypass pipeline surrounds the first contact area 21. The temperature detection module 5 detects the temperature of the first heat dissipation area 11 and the temperature of the first contact area 21. The control module 7 controls the flow regulation module 8 according to the temperature of the first heat dissipation area 11 and the first contact area 21, so that the corresponding coolant flows to the first bypass pipeline 321 and the second bypass pipeline.

[0044] By setting up a first bypass pipe 321 and a second bypass pipe, when the temperature of the power supply component 1 and / or the power assembly 2 is too high, the control module 7 drives the flow regulation module 8 to guide the coolant to the first bypass pipe 321 and / or the second bypass pipe. The first and second bypass pipes form a ring-shaped enveloping heat dissipation for the first heat dissipation area 11 and the first contact area 21, respectively, which can deliver the coolant more directly and centrally to the abnormal temperature area, significantly shortening the heat dissipation response time and ensuring temperature control of the power supply component 1 and the power assembly 2. When the temperature of the power supply component 1 is normal, the first bypass pipe 321 is idle, reducing the power consumption of the cooling assembly. When the temperature of the power assembly 2 is normal, the second bypass pipe is idle, further reducing the power consumption of the cooling assembly. The first bypass pipe 321 quickly suppresses the overheating of the first heat dissipation area 11, improves the heat dissipation capacity of the power supply component 1, and at the same time maintains the heat transferred from the first heat dissipation area 11 to the heat collector 42, maintaining the stable power generation efficiency of the thermoelectric generator 43. The second bypass pipeline quickly suppresses the overheating of the first contact area 21, improves the heat dissipation capacity of the power component 2, and at the same time maintains the heat transfer from the first contact area 21 to the heat collector 42, ensuring the stable power generation efficiency of the thermoelectric generator 43, so that the main cooling circuit 31 does not need to be adjusted to maintain the temperature difference, and while ensuring the power generation efficiency, it protects the power supply component 1 and the power component 2 to the normal operating temperature.

[0045] Furthermore, the first heat dissipation area 11 and the second heat dissipation area 12 are spaced apart, and a heat-insulating element (not shown in the figure) is provided between the first heat dissipation area 11 and the second heat dissipation area 12. The first contact area 21 and the second contact area 22 are spaced apart, and a heat-insulating element is provided between the first contact area 21 and the second contact area 22.

[0046] Example 4: This example 4 is not illustrated. The first heat dissipation area is equipped with a conductive component. The bottom of the conductive component is in contact with the heating surface of the power component, and the top is in contact with the first heat-conducting component. Multiple mounting channels are located on the sidewall of the conductive component. An auxiliary cooling plate is installed within each mounting channel, and auxiliary cooling pipes are installed within the auxiliary cooling plate. A temperature detection module detects the temperature of the first heat dissipation area, and a control module controls the flow regulation module based on the temperature of the first heat dissipation area to allow the corresponding coolant to flow to the auxiliary cooling pipes. The first contact area is configured the same as the first heat dissipation area, and will not be described again in this application. Preferably, the auxiliary cooling plate is movably mounted in the mounting channel. By controlling the movement of the auxiliary cooling plate, the heat dissipation area can be adjusted to adjust the heat dissipation efficiency.

[0047] As a preferred embodiment of this application, the waste heat recovery system further includes an energy storage unit (not shown in the figures) and a charge / discharge module (not shown in the figures). Thermoelectric generator 43 is electrically connected to the energy storage unit through the charge / discharge management module, and the thermoelectric generator 43 stores electrical energy in the energy storage unit through the charge / discharge management module. The energy storage unit can store the electrical energy generated by the thermoelectric generator 43, so that waste heat resources can be utilized more fully. The charge / discharge management module can precisely control the charging and discharging process of the energy storage unit to ensure the stable performance of the energy storage unit.

[0048] Furthermore, the control module 7 acquires the power information of the energy storage unit. Based on this power information, the control module 7 controls the flow regulation module 8 to adjust the flow rate of the main cooling circuit 31 to adjust the power generation of the thermoelectric generator 43. By adjusting the flow rate of the main cooling circuit 31 based on the power information, the control module 7 can precisely regulate the energy storage based on the energy storage status of the energy storage unit, ensuring that the power generation of the thermoelectric generator 43 matches the energy storage demand. This not only guarantees the targeted nature of energy recovery but also avoids unnecessary energy consumption by the main cooling circuit 31 and the thermoelectric generator, optimizing the overall balance between power generation efficiency and energy storage utilization, and enhancing the intelligence and economy of the entire waste heat recovery system.

[0049] As a preferred embodiment of this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 6 As shown, the power generation efficiency range includes a lower efficiency threshold and an upper efficiency threshold. The control module 7 determines the operating type based on the temperature information of the power supply component 1, the temperature information of the power component 2, and the temperature difference. The specific determination logic is as follows: Priority power generation mode determination: When the temperature difference is within the power generation efficiency range, and the temperature of power component 1 is less than or equal to the first set temperature, and the temperature of power component 2 is less than or equal to the second set temperature, the working type is determined to be priority power generation mode. The temperature difference is within the power generation efficiency range, including the temperature difference being equal to the lower efficiency threshold, the temperature difference being equal to the upper efficiency threshold, and the temperature difference being greater than the lower efficiency threshold and less than the upper efficiency threshold. Priority heat dissipation mode determination: When the temperature of power component 1 is greater than the first set temperature or the temperature of power component 2 is greater than the second set temperature, the working type is determined to be priority heat dissipation mode. Collaborative mode determination: When the temperature difference is less than the efficiency lower limit threshold, the temperature of power supply component 1 is less than or equal to the first set temperature and the temperature of power component 2 is less than or equal to the second set temperature, the working type is determined to be collaborative mode. According to the working type, the control module 7 controls the flow regulation module 8 to adjust the coolant flow of the main cooling circuit 31 and the auxiliary cooling circuit 32 accordingly.

[0050] The control module 7 determines the working type based on the temperature information of the power supply component 1, the temperature information of the power component 2, and the temperature difference, so that the waste heat recovery system can adapt to the liquid-cooled mobile fast charging equipment under different working conditions. It makes reasonable allocations for power generation efficiency and temperature control, improves the applicability of the waste heat recovery system, and improves the working stability of the liquid-cooled mobile fast charging equipment.

[0051] Furthermore, in the priority power generation mode, control module 7 controls flow regulation module 8 to adjust the coolant flow rate of the main cooling circuit 31 to the insulation difference flow rate, so that the temperature difference is within the power generation efficiency range. Control module 7 also controls flow regulation module 8 to adjust the coolant flow rate of the auxiliary cooling circuit 32 to the basic heat dissipation flow rate, so that the temperature of power supply component 1 is less than or equal to the first set temperature and the temperature of power component 2 is less than or equal to the second set temperature. In priority power generation mode, by adjusting the coolant flow rate of the main cooling circuit 31 to the insulation difference flow rate, the temperature difference is kept within the power generation efficiency range, ensuring the power generation efficiency of the thermoelectric generator 43. By adjusting the coolant flow rate of the auxiliary cooling circuit 32 to the basic heat dissipation flow rate, the temperature of power supply component 1 and power component 2 is regulated while ensuring power generation efficiency, so that power supply component 1 and power component 2 can operate stably.

[0052] The operating mode is priority heat dissipation mode. The control module 7 controls the flow regulation module 8 to adjust the coolant flow of the main cooling circuit 31 to the transition flow to reduce power generation efficiency. The control module 7 controls the flow regulation module 8 to adjust the coolant flow of the auxiliary cooling circuit 32 to the rapid heat dissipation flow to reduce the temperature of the power supply component 1 and the power component 2, so that the temperature of the power supply component 1 is reduced to less than or equal to the first set temperature, and the temperature of the power component 2 is reduced to less than or equal to the second set temperature.

[0053] The working mode is cooperative mode. The control flow regulation module 8 adjusts the auxiliary cooling circuit 32 to cooperative flow. The cooperative energy is initially 60% of the basic heat dissipation flow and is adjusted synchronously as the temperature of the power supply component 1 and the power component 2 rises. When the power supply component 1 reaches the first set temperature and the power component 2 reaches the second set temperature, the cooperative flow is equal to the basic heat dissipation flow, and the main cooling circuit 31 is adjusted to transition flow. The power generation efficiency is improved by utilizing the temperature rise of the power supply component 1 and the power component 2.

[0054] In this application, the method for determining the power generation efficiency range includes the following steps: S1. Construct the characteristic curve of the thermoelectric generator: Different temperature differences were simulated using experimental equipment (covering the theoretical operating range of thermoelectric generators). Record the power generation and output voltage data corresponding to each temperature difference; Based on the above data, the power generation efficiency was calculated, and the temperature difference-power generation efficiency characteristic curve was plotted.

[0055] S2. Determine the minimum effective power generation standard: Obtain the basic power consumption of the system's auxiliary circuitry; Statistics on the basic energy consumption for maintaining the temperature difference in the main cooling circuit; The minimum effective power generation revenue is set as: auxiliary circuit base power consumption + main cooling circuit base energy consumption × 50% (where 50% is reserved for energy consumption redundancy to avoid revenue fluctuations).

[0056] S3. Derive the lower efficiency threshold: Based on the characteristic curve obtained from S1, and combined with the minimum effective power generation revenue determined from S2; The minimum temperature difference corresponding to the minimum return is derived by reverse derivation, and this value is set as the lower limit threshold for efficiency.

[0057] S4. Determine the upper limit threshold for efficiency: Test the actual energy consumption of the main cooling circuit under different temperature differences: record the coolant flow rate required to maintain different temperature differences and calculate the corresponding energy consumption; Calculate the net revenue under different temperature differences (net revenue = power generation revenue - energy consumption of main cooling circuit). Combine the temperature safety boundaries of power supply components and power modules (i.e., not exceeding the first set temperature and the second set temperature). The temperature difference value corresponding to the maximum net benefit is defined as the efficiency upper limit threshold, at which point the coolant flow rate of the main cooling circuit is the insulation difference flow rate.

[0058] The final determined power generation efficiency range is defined as [lower efficiency threshold, upper efficiency threshold]. The first set temperature is the temperature safety boundary of the power supply component, the second set temperature is the temperature safety boundary of the power module, the transition flow rate is the coolant flow rate under the temperature difference corresponding to the basic power generation threshold, and the basic power generation threshold is 60%-70% of the lower efficiency threshold. The heat dissipation capacity of the auxiliary cooling circuit under different flow rates was tested experimentally. By keeping the ambient temperature constant, the thermal load of the core components was simulated, and the heat dissipation power and cooling time corresponding to different flow rates were recorded. The minimum flow rate with heat dissipation power slightly higher than the thermal load was selected as the rapid heat dissipation flow rate. The basic heat dissipation flow rate includes the basic heat dissipation flow rate of the power supply component and the basic heat dissipation flow rate of the power assembly. When the temperature of the power supply component reaches the first set temperature, the flow rate of the coolant used to cool the second heat dissipation area of ​​the power supply component in the auxiliary cooling circuit was experimentally measured to ensure that the temperature of the power supply component can be stably controlled within a range always lower than the first set temperature, and the deviation between the two (i.e., the difference between the actual temperature of the power supply component and the first set temperature) is less than 5°C. When the temperature of the power assembly reaches the second set temperature, the flow rate of the coolant used to cool the second contact area of ​​the power assembly in the auxiliary cooling circuit was experimentally measured to ensure that the temperature of the power assembly can be stably controlled within a range always lower than the second set temperature, and the deviation between the two (i.e., the difference between the actual temperature of the power assembly and the first set temperature) is less than 5°C.

[0059] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0060] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0061] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation, characterized in that, The liquid-cooled mobile fast charging device includes a power supply component, a power assembly, and a thermal management structure. The thermal management structure includes a liquid cooling assembly and a thermoelectric generator assembly. The thermoelectric generator assembly includes a heat-conducting component, a heat-collecting component, and a thermoelectric generator. The heat-conducting component is used to conduct heat from the power supply component and the power assembly to the heat-collecting component. The liquid cooling assembly includes a main cooling circuit and an auxiliary cooling circuit. The main cooling circuit is connected to a main cooling plate, and the auxiliary cooling circuit is connected to the power supply component and the power assembly. The hot end of the thermoelectric generator is thermally connected to the heat output surface of the heat-collecting component, and its cold end is thermally connected to the main cooling plate. The waste heat recovery system includes a control module, a temperature detection module, a flow regulation module, and a heat determination unit. The temperature detection module is configured to acquire temperature information of the hot and cold ends of the power supply component, the power assembly, and the thermoelectric generator. The heat determination unit determines the heat dissipation of the power supply component and the power assembly, as well as the temperature difference between the hot and cold ends of the thermoelectric generator, based on the temperature information. The control module controls the flow regulation module to adjust the coolant flow rates of the auxiliary cooling circuit and the main cooling circuit according to the heat dissipation and the temperature difference, so as to maintain the temperature difference within the power generation efficiency range and control the temperature of the power supply component and the power assembly.

2. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 1, characterized in that, The heat-conducting components are provided in multiple ways. These multiple heat-conducting components are divided into a first heat-conducting component for conducting heat from the power supply component and a second heat-conducting component for conducting heat from the power assembly. The power supply component includes a first heat dissipation area and a second heat dissipation area. One end of the first heat-conducting component is thermally connected to the first heat dissipation area, and the other end is connected to the first heat receiving area of ​​the heat collector. The power assembly has a first contact area and a second contact area. One end of the second heat-conducting component is thermally connected to the first contact area of ​​the power assembly, and the other end is connected to the second heat receiving area of ​​the heat collector. The cooling pipes of the auxiliary cooling circuit are respectively attached to the second heat dissipation area and the second contact area through heat dissipation plates.

3. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 2, characterized in that, The heat collection element includes a protrusion, and the first heat receiving area and the second heat receiving area are symmetrically distributed on both sides of the protrusion. The top of the protrusion is provided with the heat output surface.

4. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 3, characterized in that, The heat-conducting component includes a condensing section, an evaporating section in contact with a heat source, and a transition section connecting the evaporating section and the condensing section. The transition section is provided with a guiding channel and a draining channel. The heat-conducting component is provided with a heat-conducting medium. The heat-conducting medium evaporates in the evaporating section, enters the condensing section through the guiding channel, condenses, and flows back to the evaporating section through the draining channel. The condensing section of the first heat-conducting component is connected to the first heat receiving area, and the condensing section of the second heat-conducting component is connected to the second heat receiving area.

5. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 4, characterized in that, The lowest end face of the condensation section is higher than the highest end face of the evaporation section.

6. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 2, characterized in that, The auxiliary cooling pipeline also includes a first bypass pipeline and a second bypass pipeline. The first bypass pipeline surrounds the first heat dissipation area, and the second bypass pipeline surrounds the first contact area. The temperature detection module detects the temperature of the first heat dissipation area and the temperature of the first contact area. The control module controls the flow regulation module according to the temperature of the first heat dissipation area and the first contact area, so that the corresponding coolant flows to the first bypass pipeline and the second bypass pipeline.

7. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 1, characterized in that, The waste heat recovery system also includes an energy storage unit and a charge-discharge module. The thermoelectric generator is electrically connected to the energy storage unit through the charge-discharge module, and the thermoelectric generator stores electrical energy in the energy storage unit through the charge-discharge module.

8. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 7, characterized in that, The control module acquires the power information of the energy storage unit, and controls the flow regulation module to adjust the flow of the main cooling circuit according to the power information in order to adjust the power generation of the thermoelectric generator.

9. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 1, characterized in that, The power generation efficiency range includes a lower efficiency threshold and an upper efficiency threshold. The control module determines the operating type based on the temperature information of the power supply component, the temperature information of the power assembly, and the temperature difference. The specific determination logic is as follows: Priority power generation mode determination: When the temperature difference is within the power generation efficiency range, and the temperature of the power supply component is less than or equal to the first set temperature, and the temperature of the power assembly is less than or equal to the second set temperature, the operating type is determined to be priority power generation mode. Priority heat dissipation mode determination: When the temperature of the power supply component is greater than the first set temperature or the temperature of the power component is greater than the second set temperature, the working type is determined to be priority heat dissipation mode. Collaborative mode determination: When the temperature difference is less than the efficiency lower limit threshold, the temperature of the power supply component is less than or equal to the first set temperature, and the temperature of the power component is less than or equal to the second set temperature, the working type is determined to be collaborative mode. The control module controls the flow regulation module to adjust the coolant flow rate of the main cooling circuit and the auxiliary cooling circuit according to the working type.

10. The waste heat recovery system for a liquid-cooled mobile fast-charging device based on thermoelectric power generation according to claim 9, characterized in that, The operating type is the priority power generation mode. The control module controls the flow regulation module to adjust the coolant flow rate of the main cooling circuit to the temperature difference flow rate so that the temperature difference value is within the power generation efficiency range. The control module controls the flow regulation module to adjust the coolant flow rate of the auxiliary cooling circuit to the basic heat dissipation flow rate so that the temperature of the power supply component is less than or equal to the first set temperature and the temperature of the power component is less than or equal to the second set temperature.

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