Thermal management system

Abstract

The invention discloses a thermal management system which is used for heat dissipation of an electric drive controller, the thermal management system comprises a heat dissipation shell, a first cooling unit and a second cooling unit, the electric drive controller is installed on the heat dissipation shell, and the electric drive controller comprises a core controller; the first cooling unit is connected with the heat dissipation shell and cools the core controller through a first cooling channel located in the heat dissipation shell. The second cooling unit is connected with the heat dissipation shell and cools the core controller through a second cooling channel located in the heat dissipation shell. The first cooling channel and the second cooling channel are arranged in a stacked mode. When the current or power of the core controller exceeds a threshold value, the first cooling unit and the second cooling unit cool the core controller at the same time; when the current or the working temperature of the electric drive controller does not exceed the threshold value, the second cooling unit cools the electric drive controller. According to the thermal management system, the core controller is cooled in time, the working problem is reduced, and the maximum output current is increased.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and in particular to a thermal management system. Background Art

[0002] The electric drive controller contains power semiconductor devices, such as the core controller (IGBT), which will have switching losses at the moment of switching off and on, thus generating additional heat. The heat generated will increase the temperature of the device, and if it is not dissipated in time, it will affect its performance and reliability. At present, the electric drive controller of new energy vehicles only dissipates heat to the core controller (IGBT) through coolant, which is a single heat dissipation method. When there is a short-term high current demand in the IGBT, heat dissipation cannot be guaranteed, and the heat dissipation effect is poor.

[0003] There is an urgent need to develop a thermal management system to improve the heat dissipation effect of the core controller. Summary of the invention

[0004] The present application mainly provides a thermal management system that can improve the heat dissipation effect.

[0005] To solve the above technical problems, the technical solution adopted in the present application is: to provide a thermal management system for dissipating heat for an electric drive controller, the thermal management system comprising a heat dissipation shell, a first cooling unit and a second cooling unit, wherein the electric drive controller is installed on the heat dissipation shell, and the electric drive controller comprises a core controller; the first cooling unit is connected to the heat dissipation shell, and cools the core controller through a first cooling channel located in the heat dissipation shell; the second cooling unit is connected to the heat dissipation shell, and cools the core controller through a second cooling channel located in the heat dissipation shell; the first cooling channel and the second cooling channel are stacked; when the current or power of the core controller exceeds a threshold value, the first cooling unit and the second cooling unit cool the core controller at the same time; when the current or operating temperature of the electric drive controller does not exceed a threshold value, the second cooling unit cools the electric drive controller.

[0006] Wherein, the heat dissipation housing further includes a water cooling plate, which is located at the bottom of the electric drive controller; and the first cooling channel is embedded in the water cooling plate.

[0007] Wherein, the cooling material of the first cooling unit includes a refrigerant, and the first cooling channel includes a U-shaped copper tube.

[0008] Among them, the first cooling unit includes a compressor, a condenser and a first electronic expansion valve connected in sequence, and the compressor, the condenser and the first electronic expansion valve are connected to the electric drive controller and the motor to form a first pipeline for cooling the electric drive controller and the motor.

[0009] The first cooling unit further includes a second electronic expansion valve and a plate heat exchanger, wherein the compressor, the condenser and the second electronic expansion valve are connected in sequence and connected to the battery to form a second pipeline for cooling the battery; the first cooling unit exchanges heat with the battery through the plate heat exchanger to achieve cooling of the battery.

[0010] The second cooling unit includes a water pump and a motor radiator, wherein the water pump is used to provide cooling liquid; the motor radiator is connected to the motor and the electric drive controller, and is used to exchange the coldness of the cooling liquid with the heat generated by the motor and the electric drive controller.

[0011] Wherein, the heat dissipation housing further includes: a refrigerant inlet and a refrigerant outlet, and the refrigerant in the first cooling unit enters the first cooling channel through the refrigerant inlet and is discharged from the first cooling channel through the refrigerant outlet.

[0012] The second cooling channel is located below the first cooling channel, and the second cooling channel is located in the heat dissipation cavity of the heat dissipation housing. The heat dissipation housing further includes: a bottom sealing plate for sealing the heat dissipation cavity.

[0013] Wherein, the heat dissipation housing further includes: a coolant inlet and a coolant outlet, and the coolant in the second cooling unit enters the second cooling channel through the coolant inlet and is discharged from the second cooling channel through the coolant outlet.

[0014] Wherein, the heat dissipation housing further comprises cooling fins, which are located in the heat dissipation cavity; the cooling fins are prismatic.

[0015] The beneficial effects of the present application are as follows: in the thermal management system of the present application, when the current or power of the core controller exceeds the threshold, the first cooling unit and the second cooling unit cool the core controller at the same time; when the current or operating temperature of the electric drive controller does not exceed the threshold, the second cooling unit cools the electric drive controller. Through the thermal management system in the present application, the core controller is cooled in time, working problems are reduced, the maximum output current is increased, and a good heat dissipation effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the embodiments. 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 creative work. Among them:

[0017] Figure 1This is a schematic diagram of the structure of an implementation scheme of a thermal management system in this application;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of an implementation scheme of an electric drive controller;

[0019] Figure 3 This is a schematic structural diagram of an implementation scheme of a first cooling channel in a thermal management system of the present application;

[0020] Figure 4 for Figure 3 A schematic structural diagram of an implementation scheme of the first cooling channel;

[0021] Figure 5 for Figure 3 A schematic diagram of the front structure of an embodiment of a heat dissipation housing;

[0022] Figure 6 for Figure 3 A schematic diagram of the side structure of an embodiment of a heat dissipation housing;

[0023] Figure 7 for Figure 3 A schematic diagram of the bottom structure of an embodiment of a heat dissipation housing.

[0024] Explanation of the reference numerals in the accompanying drawings: 100 thermal management system; 10 heat dissipation housing; 11 refrigerant inlet; 12 refrigerant outlet; 13 coolant inlet; 14 coolant outlet; 15 bottom sealing plate; 16 cooling fins; 20 electric drive controller; 21 core controller; 22 filter component; 23 capacitor; 24 control drive board; 30 first cooling unit; 31 water cooling plate; 32 first cooling channel; 33 compressor; 34 condenser; 35 first electronic expansion valve; 36 second electronic expansion valve; 40 second cooling unit; 41 water pump; 42 motor radiator; 43 second cooling channel; 50 motor; 60 battery; 61 plate heat exchanger. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0027] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] See also Figure 1 and Figure 2The present application provides a thermal management system 100 for dissipating heat for an electric drive controller 20. The thermal management system 100 includes a heat dissipation housing 10, a first cooling unit 30, and a second cooling unit 40, wherein the electric drive controller 20 is mounted on the heat dissipation housing 10, and the electric drive controller 20 includes a core controller 21; the first cooling unit 30 is connected to the heat dissipation housing 10, and cools the core controller 21 through a first cooling channel 32 located in the heat dissipation housing 10; the second cooling unit 40 is connected to the heat dissipation housing 10, and cools the core controller 21 through a second cooling channel 43 located in the heat dissipation housing 10; the first cooling channel 32 and the second cooling channel 43 are stacked; when the current or power of the core controller 21 exceeds a threshold value, the first cooling unit 30 and the second cooling unit 40 cool the core controller 21 at the same time; when the current or operating temperature of the electric drive controller 20 does not exceed the threshold value, the second cooling unit 40 cools the electric drive controller 20.

[0031] Specifically, the electric drive controller 20 is mainly used to control the operation of the motor 50, including parameters such as the speed, torque, and direction of the motor 50. The core controller 21 plays a key role in power conversion in the electric drive controller 20. The thermal management system 100 in the present application dissipates heat for the core controller 21 in the electric drive controller 20, and can dissipate heat for the core controller 21 separately through the second cooling channel 43 in the second cooling unit 40, or dissipate heat for the core controller 21 simultaneously through the first cooling channel 32 and the second cooling channel 43. The electric drive controller 20 is located on the heat dissipation housing 10, and the first cooling unit 30 and the second cooling unit 40 are both embedded in the heat dissipation housing 10 to effectively dissipate heat for the core controller 21. At the same time, the electric drive controller 20 provides one or two heat dissipation methods under different working conditions through the thermal management system 100 according to the working temperature of the core controller 21. The second cooling unit 40 is used for cooling in normal working conditions, and the first cooling unit 30 and the second cooling unit 40 are used for cooling at the same time for peak power, so as to reduce the working temperature of the IGBT.

[0032] See also Figure 2The electric drive controller 20 includes a filter component 22, a capacitor 23, a control drive board 24, and a core controller 21. The electric drive controller 20 is located on the heat dissipation housing 10. The thermal management system 100 dissipates heat to the core controller 21 by dissipating heat from the heat dissipation housing 10, and the core controller 21 supplies power to the motor 50. The various components of the electric drive controller 20 play a key role in ensuring stable operation, achieving precise control, and protecting electronic components. Specifically, the filter component 22 has the function of filtering out clutter and stabilizing voltage. In the circuit, various high-frequency clutter and interference signals will be generated when the power input or other electronic components are working. The filter component 22 can filter out these clutters through the circuit composed of components such as inductors and capacitors 23 according to the principle of electromagnetic induction and the charging and discharging of the capacitor 23, so that the current entering the electric drive controller 20 is purer, avoiding clutter interference with the control signal, and ensuring the accuracy of the control command. At the same time, some filter components 22 have a voltage stabilization function, which can adjust the input voltage to ensure that it is within the acceptable stable range of the electric drive controller 20.

[0033] Capacitor 23 has the functions of energy storage and release, filtering assistance and improving power factor; capacitor 23 has the ability to store charge; it works with filter component 22 to further filter out high-frequency noise in the circuit. In addition, in an AC circuit, capacitor 23 can compensate for the reactive power of the circuit and improve the power factor.

[0034] The control drive board 24 has the functions of signal processing and control, protection and monitoring, and serves as a communication interface. It can receive control signals from the outside, such as acceleration and deceleration instructions of the vehicle, and process and analyze these signals. It monitors various parameters in the circuit in real time to ensure the safe operation of the controller. As a communication bridge between the electric drive controller 20 and other devices or systems, it exchanges data with other control units (such as the vehicle controller VCU), sensors, etc. of the vehicle through various communication protocols.

[0035] The core controller 21 has the characteristics of power conversion, efficient power control and fast switching. It is a high-power power electronic device. In the electric drive controller 20, it is mainly used to convert direct current into alternating current (in inverter applications) or to accurately control and regulate current. It has the characteristics of high input impedance and low conduction voltage drop, and can achieve efficient power conversion and control. At the same time, it can achieve on-off switching in a short time, and its switching speed is fast, which can meet the requirements of the electric drive controller 20 for fast and accurate control of loads such as the motor 50.

[0036] The heat dissipation housing 10 plays the role of heat dissipation, protection and support. During the operation of the electric drive controller 20, components such as IGBT will generate a lot of heat due to power conversion. The heat dissipation housing 10 quickly transfers this heat through its own good thermal conductivity to prevent the component temperature from being too high. At the same time, it provides physical protection for the electronic components inside the electric drive controller 20 to prevent them from being damaged by external collisions, dust, water vapor, etc. As the outer shell of the entire electric drive controller 20, the heat dissipation housing 10 plays the role of supporting and fixing the internal components, ensuring that each component can still maintain a stable relative position under working conditions such as vibration and impact, thereby ensuring the reliability and stability of the electric drive controller 20.

[0037] See also Figure 3 and Figure 4 The heat dissipation housing 10 further includes a water cooling plate 31, which is located at the bottom of the electric drive controller 20; the first cooling channel 32 is embedded in the water cooling plate 31. Specifically, the water cooling plate 31 in the heat dissipation housing 10 is designed to fit the electric drive controller 20, is located at the bottom of the electric drive controller 20, and is used to dissipate heat for the electric drive controller 20. The first cooling channel 32 is embedded in the water cooling plate 31 to enhance the heat dissipation function of the water cooling plate 31 and ensure the heat dissipation effect for the electric drive controller 20.

[0038] Please continue reading Figure 3 , the cooling material of the first cooling unit 30 includes a refrigerant, and the first cooling channel 32 includes a U-shaped copper tube (not shown). Specifically, the refrigerant is used for refrigeration and has a good cooling effect. At the same time, the cooling channel design of the U-shaped copper tube can increase the contact area between the first cooling channel 32 and the part to be cooled, increase the cooling area, and thus improve the cooling effect. In addition, copper is used as the design for preparing the first cooling channel. Copper has a high thermal conductivity and excellent heat transfer performance. Compared with other common metals, such as aluminum, it can transfer heat more quickly. This allows the refrigerant to quickly absorb heat from the surrounding environment when flowing in the U-shaped copper tube, thereby improving the refrigeration efficiency.

[0039] Please continue reading Figure 1, the first cooling unit 30 includes a compressor 33, a condenser 34 and a first electronic expansion valve 35 connected in sequence. The compressor 33, the condenser 34 and the first electronic expansion valve 35 are connected to the electric drive controller 20 and the motor 50 to form a first pipeline (not shown) for cooling the electric drive controller 20 and the motor 50. Specifically, the first cooling unit 30 uses a refrigerant for cooling, and the heat dissipation of the refrigerant includes a compression process, a condensation process, an expansion process and an evaporation process; wherein, during the compression process: the refrigerant is compressed in the compressor 33, and its pressure and temperature increase. This process converts electrical energy into the internal energy of the refrigerant, making the refrigerant in a high temperature and high pressure state. During the condensation process: the high temperature and high pressure refrigerant enters the condenser 34. The condenser 34 is usually cooled by air or water to dissipate the heat of the refrigerant to the surrounding environment. The refrigerant gradually changes from gas to liquid in the condenser 34. During this process, the temperature of the refrigerant decreases and a large amount of heat is released. During the expansion process: the pressure of the liquid refrigerant drops sharply after passing through the first electronic expansion valve 35. As the pressure decreases, the boiling point of the refrigerant also decreases, and part of the refrigerant will quickly vaporize and absorb heat from the surrounding environment, thereby producing a cooling effect. In this process, the refrigerant changes from a liquid state to a gas-liquid mixed state, and the temperature also drops significantly. Evaporation process (at the heat dissipation object): The refrigerant after passing through the first electronic expansion valve 35 enters the first cooling channel 32 of the electric drive controller 20, where the refrigerant continues to absorb heat and vaporizes, taking away the heat generated by the electric drive controller 20, thereby achieving heat dissipation of the electric drive controller 20. As the refrigerant continues to absorb heat, it will gradually completely change from a liquid state to a gas state, and then be sucked into the compressor 33 to start the next cycle.

[0040] Please continue reading Figure 1 The first cooling unit 30 further includes a second electronic expansion valve 36 and a plate heat exchanger 61, wherein the compressor 33, the condenser 34 and the second electronic expansion valve 36 are connected in sequence and connected to the battery 60 to form a second pipeline (not shown) for cooling the battery 60; the first cooling unit 30 exchanges heat with the battery 60 through the plate heat exchanger 61 to achieve cooling of the battery 60. Specifically, through the design of the second electronic expansion valve 36, the first cooling unit 30 cools the battery 60, thereby improving the cooling effect.

[0041] Please continue reading Figure 1 The second cooling unit 40 includes a water pump 41 and a motor radiator 42, wherein the water pump 41 is used to provide cooling liquid; the motor radiator 42 is connected to the motor 50 and the electric drive controller 20, and is used to exchange the coldness of the cooling liquid with the heat generated by the motor 50 and the electric drive controller 20. Specifically, the water pump 41 in the second cooling unit 40 is designed to provide cooling liquid, and the design of the motor radiator 42 improves the heat dissipation efficiency.

[0042] See also Figure 3and Figure 4 The heat dissipation housing 10 also includes a refrigerant inlet 11 and a refrigerant outlet 12. The refrigerant in the first cooling unit 30 enters the first cooling channel 32 through the refrigerant inlet 11 and is discharged from the first cooling channel 32 through the refrigerant outlet 12. Specifically, the first cooling channel 32 is controlled by the thermal management system 100. Under the condition of maximum power and high current demand, the refrigerant enters from the refrigerant inlet 11, dissipates heat to the core controller 21 through the first cooling channel 32, and returns to the thermal management system 100 through the refrigerant outlet 12 after heat dissipation. The refrigerant will only be introduced to dissipate heat for the IGBT when the motor 50 has the maximum power and maximum current demand. The first cooling unit 30 does not work at normal power, reducing the energy loss of the compressor 33. The first cooling channel 32 is made of a U-shaped copper tube, which can be integrated with the heat dissipation housing 10 by die-casting on the upper part of the second cooling channel 43, or welded to the heat dissipation housing 10 by vacuum brazing.

[0043] See also Figure 5 , Figure 6 and Figure 7 The second cooling channel 43 is located below the first cooling channel 32. The second cooling channel 43 is located in the heat dissipation cavity (not shown) of the heat dissipation housing 10. The heat dissipation housing 10 also includes a bottom sealing plate 15, which seals the heat dissipation cavity. Specifically, the second cooling channel 43 is stacked with the first cooling channel 32. The second cooling channel 43 can dissipate heat from the first cooling channel 32 to achieve a better heat dissipation effect. At the same time, the heat dissipation housing 10 also includes a bottom sealing plate 15, which seals the heat dissipation cavity to ensure the cooling effect.

[0044] Please continue reading Figure 4 , Figure 5 and Figure 6 The heat dissipation housing 10 further includes a coolant inlet 13 and a coolant outlet 14. The coolant in the second cooling unit 40 enters the second cooling channel 43 through the coolant inlet 13 and is discharged from the second cooling channel 43 through the coolant outlet 14. Specifically, the second cooling channel 43 is controlled by the thermal management system 100, and the coolant inlet 13 enters the second cooling channel 43. The second cooling channel 43 is composed of a bottom plate sealing plate and the heat dissipation housing 10 by welding or installation to ensure sealing.

[0045] Please continue reading Figure 6 The heat dissipation housing 10 further includes cooling fins 16, which are located in the heat dissipation cavity; the cooling fins 16 are prismatic. The heat dissipation cavity of the heat dissipation housing 10 includes prismatic cooling fins 16, which increase the heat dissipation area, reduce the flow resistance, dissipate heat for the upper core controller 21, and improve the heat dissipation effect.

[0046] In the thermal management system 100 of the present application, the electric drive controller 20 is cooled through two heat dissipation channels. In the second cooling unit 40, the electric drive controller 20 and the motor 50 are cooled by the water pump 41, the motor radiator 42, etc. In the first cooling unit 30, the electric drive controller 20 is cooled by the compressor 33, the condenser 34, and the electronic expansion valve. At the same time, the first cooling unit 30 also cools the battery 60. When the core controller 21 receives the peak power maximum current demand of the vehicle controller (VCU), combined with the junction temperature of the core controller 21, the compressor 33 and the first electronic expansion valve 35 are controlled in advance through the thermal management system 100 to fill the first cooling channel 32 with refrigerant, reduce the working problems of the core controller 21, increase the maximum output current of the core controller 21, and reduce the current selection cost of the core controller 21.

[0047] The thermal management system 100 in this application has the following advantages:

[0048] (1) The electric drive controller 20 provides one or two cooling systems under different working conditions through the thermal management system 100. The second cooling unit 40 is used under normal working conditions, and the first cooling unit 30 and the second cooling unit 40 are used simultaneously under peak power.

[0049] (2) In the thermal management system 100 , by connecting the second cooling unit 40 in parallel, the refrigerant enters the cooling channel of the electric drive controller 20 through the first electronic expansion valve 35 to dissipate heat for the core controller 21 .

[0050] (3) The first cooling channel 32 and the second cooling channel 43 are stacked, and the first cooling channel 32 is embedded in the middle of the water cooling plate 31, so that the heat dissipation effect is better.

[0051] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A thermal management system, characterized in that: Used to dissipate heat for the electric drive controller, the thermal management system includes: A heat dissipation housing, the electric drive controller is mounted on the heat dissipation housing, and the electric drive controller includes a core controller; A first cooling unit is connected to the heat dissipation housing and cools the core controller through a first cooling channel located in the heat dissipation housing; A second cooling unit is connected to the heat dissipation housing and cools the core controller through a second cooling channel located in the heat dissipation housing; The first cooling channel and the second cooling channel are stacked; When the current or power of the core controller exceeds a threshold, the first cooling unit and the second cooling unit cool the core controller simultaneously; when the current or operating temperature of the electric drive controller does not exceed a threshold, the second cooling unit cools the electric drive controller.

2. The thermal management system according to claim 1, characterized in that: The heat dissipation housing further comprises: A water cooling plate, located at the bottom of the electric drive controller; The first cooling channel is embedded in the water cooling plate.

3. The thermal management system according to claim 2, characterized in that: The cooling material of the first cooling unit includes a refrigerant, and the first cooling channel includes a U-shaped copper tube.

4. The thermal management system according to claim 2, characterized in that: The first cooling unit includes a compressor, a condenser and a first electronic expansion valve connected in sequence. The compressor, the condenser and the first electronic expansion valve are connected to the electric drive controller and the motor to form a first pipeline for cooling the electric drive controller and the motor.

5. The thermal management system according to claim 4, characterized in that: The first cooling unit also includes: A second electronic expansion valve, wherein the compressor, the condenser and the second electronic expansion valve are connected in sequence and connected to a battery to form a second pipeline for cooling the battery; Plate heat exchanger: the first cooling unit exchanges heat for the battery through a plate heat exchanger to achieve cooling of the battery.

6. The thermal management system according to claim 1, characterized in that: The second cooling unit comprises: A water pump for providing cooling liquid; The motor radiator is connected to the motor and the electric drive controller and is used to exchange the coldness of the cooling liquid with the heat generated by the motor and the electric drive controller.

7. The thermal management system according to claim 1, characterized in that: The heat dissipation housing further comprises: A refrigerant inlet and a refrigerant outlet, wherein the refrigerant in the first cooling unit enters the first cooling channel through the refrigerant inlet and is discharged from the first cooling channel through the refrigerant outlet.

8. The thermal management system according to claim 6, characterized in that: The second cooling channel is located below the first cooling channel, and the second cooling channel is located in the heat dissipation cavity of the heat dissipation housing. The heat dissipation housing further comprises: a bottom sealing plate for sealing the heat dissipation cavity.

9. The thermal management system according to claim 7, characterized in that: The heat dissipation housing further comprises: A cooling liquid inlet and a cooling liquid outlet, the cooling liquid in the second cooling unit enters the second cooling channel through the cooling liquid inlet, and is discharged from the second cooling channel through the cooling liquid outlet.

10. The thermal management system according to claim 8, characterized in that: The heat dissipation housing further comprises: Cooling fins are located in the heat dissipation cavity; The cooling fins are prismatic.

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