Electric vehicle liquid cooling power system and electric vehicle

Abstract

The invention relates to the technical field of electric vehicles, and particularly discloses an electric vehicle liquid cooling power system and an electric vehicle, and the electric vehicle liquid cooling power system further comprises a controller assembly, a first flow guide assembly and a second flow guide assembly. The controller assembly is arranged on the stator assembly, so that efficient utilization of space is realized, and the integration degree of the liquid cooling power system of the electric vehicle is improved; the first flow guide assembly and the second flow guide assembly are arranged, so that when the motor main body is in a rotating state, the stator assembly and the controller assembly share the insulating cooling liquid in the accommodating cavity, and the first circulating flow channel can drive the insulating cooling liquid to flow to the controller assembly, thereby realizing cooling of the controller assembly; and the second circulating flow channel can drive the insulating cooling liquid to flow to the stator assembly, so that the stator assembly is cooled, heat generated by the stator assembly and the controller assembly under high load can be led out through the insulating cooling liquid, and the purpose of efficient heat dissipation is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to an electric vehicle liquid cooling power system and an electric vehicle. BACKGROUND

[0002] At present, the power system of a two-wheeled electric vehicle usually consists of three core components, i.e. an electric motor, a controller and a battery. In the prior art, the controller is usually independently installed inside a vehicle frame or below a seat bucket and connected to the electric motor and the battery through a wire harness, which has a poor integration degree. Moreover, as the power of the electric motor is continuously improved (especially in the case of high-speed electric motorcycles or heavy loads), the heat generated by the controller during high-load operation increases significantly, and the traditional cooling method is difficult to effectively dissipate the heat, which may cause the temperature of internal components of the controller to rise too high, resulting in performance degradation, thermal protection shutdown, and even permanent damage. Therefore, it is urgent to further optimize the integration degree of the electric vehicle liquid cooling power system and the cooling method of the controller during high-load operation. SUMMARY

[0003] The present application aims to provide an electric vehicle liquid cooling power system and an electric vehicle to solve the problems of poor integration degree of the electric vehicle liquid cooling power system and poor cooling effect of the controller during high-load operation in the prior art.

[0004] In one aspect, the present application provides an electric vehicle liquid cooling power system, which comprises an electric motor body and an insulating cooling liquid. The electric motor body comprises a support shaft, a stator assembly coaxially sleeved on the support shaft, a rotor wheel rotating relative to the stator assembly, a first tight cover and a second tight cover respectively connected to the two sides of the rotor wheel, and the rotor wheel, the first tight cover and the second tight cover form an accommodating cavity. The insulating cooling liquid and the stator assembly are located in the accommodating cavity. The electric vehicle liquid cooling power system further comprises a controller assembly arranged on the stator assembly, a first flow guide assembly arranged on the first tight cover, the first flow guide assembly having a plurality of first circulating flow channels in communication with the accommodating cavity, and a second flow guide assembly arranged on the second tight cover, the second flow guide assembly having a plurality of second circulating flow channels in communication with the accommodating cavity, and the flow direction of the insulating cooling liquid in the second circulating flow channels is opposite to that in the first circulating flow channels. In the rotating state of the electric motor body, the first circulating flow channels can drive the insulating cooling liquid to flow to the controller assembly, and the second circulating flow channels can drive the insulating cooling liquid to flow to the stator assembly.

[0005] As an optional technical solution of the electric vehicle liquid cooling power system, the controller assembly has an inner hole, and the support shaft passes through the inner hole.

[0006] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, the controller assembly comprises a PCB board, an aluminum-based support plate and a support connecting piece, the support connecting piece passes through the PCB board and the aluminum-based support plate in sequence and is connected with the stator assembly, and the support connecting piece separates the PCB board and the aluminum-based support plate.

[0007] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, a hollow region is arranged between the PCB board and the aluminum-based support plate, and silica gel is arranged in the hollow region.

[0008] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, the PCB board is electrically connected with three-phase lines of the motor body.

[0009] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, power connection posts and motor signal ports are arranged on the PCB board at intervals, the power connection posts are provided with insulating washers, the motor signal ports are provided with temperature control sensor interfaces, and the temperature control sensors are used for detecting the temperature of the insulating cooling liquid.

[0010] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, a burning port and a wireless communication module are further arranged on the PCB board at intervals.

[0011] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, the first flow guide assembly comprises a first flow guide ring, a plurality of first fan blades and a plurality of first skirt lining rings arranged on both sides of the first flow guide ring, the first skirt lining rings are arranged on a side of the first flow guide ring facing the first cover, the plurality of first fan blades are rotationally symmetrically arranged along the axis direction of the first cover, and the first cover, the first flow guide ring, the plurality of first skirt lining rings and the plurality of first fan blades form a plurality of first circulating flow channels.

[0012] As an optional technical scheme of the liquid-cooled power system of the electric vehicle, the second flow guide assembly comprises a second flow guide ring, a plurality of second fan blades and a plurality of second skirt lining rings arranged on both sides of the second flow guide ring, the second skirt lining rings are arranged on a side of the second flow guide ring facing the second cover, the plurality of second fan blades are rotationally symmetrically arranged along the axis direction of the second cover, and the second cover, the second flow guide ring, the plurality of second skirt lining rings and the plurality of second fan blades form a plurality of second circulating flow channels.

[0013] In another aspect, the application provides an electric vehicle comprising an electric vehicle body and the liquid-cooled power system of the electric vehicle according to any one of the above-mentioned schemes, and the liquid-cooled power system of the electric vehicle is installed on the electric vehicle body.

[0014] The application has the following beneficial effects:

[0015] The application provides an electric vehicle liquid cooling power system, which comprises a motor body and an insulating cooling liquid, the motor body comprises a supporting shaft, a stator assembly coaxially sleeved on the supporting shaft, a rotor wheel rotating relative to the stator assembly, a first tight cover and a second tight cover respectively connected to two sides of the rotor wheel, the rotor wheel, the first tight cover and the second tight cover are enclosed to form a containing cavity, and the insulating cooling liquid and the stator assembly are located in the containing cavity. The electric vehicle liquid cooling power system further comprises a controller assembly, a first flow guide assembly and a second flow guide assembly. The controller assembly is arranged on the stator assembly in the electric vehicle liquid cooling power system, so that the space is efficiently utilized, the separate sealing and the shell structure of the controller assembly are omitted, and the integration degree of the electric vehicle liquid cooling power system is improved. Meanwhile, the first flow guide assembly and the second flow guide assembly are arranged, the flow direction of the insulating cooling liquid in the second circulating flow channel is opposite to that of the insulating cooling liquid in the first circulating flow channel, so that the stator assembly and the controller assembly share the insulating cooling liquid in the containing cavity when the motor body is in a rotating state, the first circulating flow channel can drive the insulating cooling liquid to flow to the controller assembly, so that the controller assembly is cooled, and the second circulating flow channel can drive the insulating cooling liquid to flow to the stator assembly, so that the stator assembly is cooled. In this way, the heat generated by the stator assembly and the controller assembly under high load can be conducted out through the insulating cooling liquid, and the purpose of efficient heat dissipation is achieved. The electric vehicle liquid cooling power system can effectively solve the problems of poor integration degree of the electric vehicle liquid cooling power system and poor heat dissipation effect of the controller under high load in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the electric vehicle liquid cooling power system in the embodiment of the application.

[0017] Figure 2 It is a sectional view of the controller assembly in the embodiment of the application.

[0018] Figure 3 It is a structural schematic view of the controller assembly in the embodiment of the application.

[0019] Figure 4 It is a structural schematic view of the controller assembly in the embodiment of the application from another angle.

[0020] Figure 5 It is a schematic view of part of the structure of the controller assembly in the embodiment of the application.

[0021] Figure 6 It is a structural schematic view of the stator assembly in the embodiment of the application.

[0022] Figure 7 It is a structural schematic view of the first flow guide assembly in the embodiment of the application.

[0023] Fig.:

[0024] 1, motor body; 11, support shaft; 12, stator assembly; 121, stator body; 122, stator support; 123, mounting hole; 13, rotor wheel; 14, first tight cover; 15, second tight cover; 16, accommodating cavity;

[0025] 2, controller assembly; 21, inner hole; 22, PCB board; 221, phase line connecting column; 222, power supply connecting column; 2221, insulating washer; 223, motor signal port; 224, burning port; 225, wireless communication module; 23, aluminum base support plate; 24, support connecting piece; 25, silica gel;

[0026] 3, first flow guide assembly; 31, first flow guide ring; 32, first fan blade; 33, first skirt lining;

[0027] 4, second flow guide assembly;

[0028] 51, bearing; 52, oil seal;

[0029] 61, MOS tube group; 62, MCU; 63, driving chip; 64, capacitor; 65, sampling chip; 66, sampling resistor; 67, power supply chip. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature to the second feature include the vertical height of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical height of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0034] As Figures 1 to 7 shown, the present embodiment provides a motor car liquid cooling power system, the motor car liquid cooling power system includes a motor body 1 and an insulating cooling liquid, the motor body 1 includes a support shaft 11, a stator assembly 12 coaxially sleeved on the support shaft 11, a rotor wheel 13 rotating relative to the stator assembly 12, a first tight cover 14 and a second tight cover 15 connected with both sides of the rotor wheel 13 respectively, the rotor wheel 13, the first tight cover 14 and the second tight cover 15 are surrounded to form a containing cavity 16, the insulating cooling liquid and the stator assembly 12 are located in the containing cavity 16, the stator assembly 12 includes a stator body 121 and a stator support 122, the stator body 121 is sleeved on the support shaft 11 through the stator support 122, the motor car liquid cooling power system further includes: a controller assembly 2 arranged on the stator assembly 12; a first flow guide assembly 3 arranged on the first tight cover 14, the first flow guide assembly 3 has a plurality of first circulating flow channels communicating with the containing cavity 16; a second flow guide assembly 4 arranged on the second tight cover 15, the second flow guide assembly 4 has a plurality of second circulating flow channels communicating with the containing cavity 16, the flow direction of the insulating cooling liquid in the second circulating flow channel is opposite to that in the first circulating flow channel; wherein, in the rotating state of the motor body 1, the first circulating flow channel can drive the insulating cooling liquid to flow to the controller assembly 2, and the second circulating flow channel can drive the insulating cooling liquid to flow to the stator assembly 12.

[0035] The electric vehicle liquid cooling power system adopts the arrangement mode that the controller assembly 2 is arranged on the stator assembly 12, so that the space is used efficiently, the separate sealing and the shell structure of the controller assembly 2 are saved, and the integration degree of the electric vehicle liquid cooling power system is improved; meanwhile, the first flow guide assembly 3 and the second flow guide assembly 4 are arranged, the flow direction of the insulation cooling liquid in the second circulation flow channel is opposite to the flow direction of the insulation cooling liquid in the first circulation flow channel, so that the insulation cooling liquid in the shared accommodation cavity 16 of the stator assembly 12 and the controller assembly 2 can be driven to flow to the controller assembly 2 when the motor body is in a rotating state, so that the controller assembly 2 is cooled; and the insulation cooling liquid can be driven to flow to the stator assembly 12 by the second circulation flow channel, so that the stator assembly 12 is cooled, so that the heat generated by the stator assembly 12 and the controller assembly 2 under high load can be conducted out through the insulation cooling liquid, and the purpose of efficient heat dissipation is achieved. The electric vehicle liquid cooling power system can effectively solve the problems of poor integration degree of the electric vehicle liquid cooling power system and poor heat dissipation effect of the controller under high load in the prior art.

[0036] In the embodiment, the controller assembly 2 has an inner hole 21, and the support shaft 11 passes through the inner hole 21, so that the controller assembly 2 is sleeved on the support shaft 11, and the stability and reliability of the connection between the controller assembly 2 and the stator support 122 are improved.

[0037] In some embodiments, the controller assembly 2 includes a PCB board 22, an aluminum-based support plate 23 and a support connecting piece 24. The support connecting piece 24 passes through the PCB board 22 and the aluminum-based support plate 23 in sequence and is connected with the stator assembly 12, so that the controller assembly 2 and the stator assembly 12 are connected, wherein the support connecting piece 24 separates the PCB board 22 and the aluminum-based support plate 23, so that the PCB board 22 realizes normal line conduction and insulation with the stator assembly 12. Moreover, the aluminum-based support plate 23 is adopted to realize the integration with the stator assembly 12, and plays an important supporting role in the stability of the whole controller assembly 2, and assists the rapid heat conduction and heat dissipation of the controller assembly 2.

[0038] Optionally, the stator assembly 12 includes mounting holes 123 arranged on the stator support 122, and the support connecting piece 24 passes through the PCB board 22, the aluminum-based support plate 23 and the mounting holes 123 in sequence. The support connecting piece 24 and the mounting holes 123 are both multiple, and the multiple support connecting pieces 24 and the multiple mounting holes 123 are arranged one by one.

[0039] Further, the PCB board 22 and the aluminum base support plate 23 have a hollowed-out area, and the hollowed-out area is provided with silica gel 25. In this way, the insulation reliability and safety of the entire electric vehicle liquid-cooled power system are further ensured.

[0040] In the embodiment, the PCB board 22 is provided with three phase line connecting columns 221, and the three phase line connecting columns 221 are electrically connected with three-phase lines of the motor body 1. In this way, in order to realize wiring direct connection between the motor body 1 and the controller assembly 2, the three phase line connecting columns 221 on the PCB board 22 are directly connected with the three-phase lines of the motor body 1, and because the internal liquid cooling form is adopted, the winding of the motor body 1 and the PCB board 22 can be connected by using low-cost modular copper bars, PCB direct connection or FPC flexible circuit connection, thereby greatly reducing the use amount of external high-voltage wire harness. At the same time, the motor Hall or other sensor signal lines are also directly connected with the PCB board 22, thereby greatly simplifying or reducing the use amount of high-voltage and high-temperature wire harness when the external motor body 1 is connected with the controller assembly 2.

[0041] In some embodiments, in order to improve the integration degree of the controller assembly 2 in the electric vehicle liquid-cooled power system, power connection columns 222 and motor signal ports 223 are provided on the PCB board 22 in an interval. The power connection columns 222 are provided with an insulating washer 2221, and insulation is realized between the power connection columns 222 and the motor body 1, and the stator support 122 and the stator body 121 themselves are provided with insulation measures, thereby ensuring the safety of the controller assembly 2 in the containing cavity 16. In addition, the motor signal port 223 has a temperature control sensor interface, and the temperature control sensor is used for detecting the temperature of the insulating cooling liquid. In this way, the electric vehicle liquid-cooled power system can detect the temperature of the insulating cooling liquid, and based on the detected temperature of the insulating cooling liquid, the controller assembly 2 formulates a cooperative control strategy, and according to the recognized temperature, the motor body 1 and the controller assembly 2 are protected. That is, the controller assembly 2 can dynamically adjust the output power, the PWM frequency or the start protection mechanism. The PWM frequency refers to the number of complete cycles of the PWM signal per second, and the unit is hertz (Hz). The core function of the PWM frequency is to determine the signal switching speed, and affects the system response speed, noise and efficiency.

[0042] Further, the PCB board 22 is also provided with a burning port 224 and a wireless communication module 225 in an interval. The burning port 224 supports OTA (Over-the-Air, over-the-air technology) wired upgrade system parameters and optimization, and realizes function iteration by remotely updating control strategies, temperature control thresholds and other parameters. The wireless communication module 225 (UWB (Ultra Wide Band), Bluetooth) can also realize leadless data transmission, reduce the shell interface, improve the sealing performance, and also realize wireless upgrade.

[0043] Optionally, asFigure 5 As shown, the PCB 22 is further provided with a MOS tube group 61, an MCU (Microcontroller Unit) 62, a driving chip 63, a capacitor 64, a sampling chip 65, a sampling resistor 66, and a power supply chip 67. The MOS tube group generally refers to a circuit module composed of multiple MOS tubes, mainly used for realizing specific functions (such as switch control, signal amplification, etc.), and is commonly used in electronic devices.

[0044] In the embodiment, the first flow guide assembly 3 includes a first flow guide ring 31, a plurality of first vanes 32 and a plurality of first skirt liners 33 arranged on both sides of the first flow guide ring 31, respectively. The first skirt liners 33 are located on the side of the first flow guide ring 31 facing the first tight cover 14. The plurality of first vanes 32 are rotationally symmetrically arranged along the axis direction of the first tight cover 14. The first tight cover 14, the first flow guide ring 31, the plurality of first skirt liners 33, and the plurality of first vanes 32 form a plurality of first circulating flow channels.

[0045] Similarly, the second flow guide assembly 4 includes a second flow guide ring, a plurality of second vanes, and a plurality of second skirt liners arranged on both sides of the second flow guide ring. The second skirt liners are located on the side of the second flow guide ring facing the second tight cover 15. The plurality of second vanes are rotationally symmetrically arranged along the axis direction of the second tight cover 15. The second tight cover 15, the second flow guide ring, the plurality of second skirt liners, and the plurality of second vanes form a plurality of second circulating flow channels.

[0046] In this way, the plurality of first circulating flow channels and the plurality of second circulating flow channels are arranged. When operating in the circumferential direction, the insulating cooling liquid passes through the plurality of first circulating flow channels and has a downward tendency to spray. The insulating cooling liquid passes through the plurality of second circulating flow channels and has an upward tendency to spray. That is, when the motor body 1 is running, the first flow guide assembly 3 "introduces" the insulating cooling liquid to the controller assembly 2 through the plurality of downward circulating first circulating flow channels, and the second flow guide assembly 4 discharges the insulating cooling liquid to the stator assembly 12. The two "work in different positions" but "do not interfere with each other", and respectively realize the rapid heat dissipation of the built-in controller assembly 2 and the motor body 1. The heat dissipation efficiency is improved, local overheating is avoided, and long-time high-load operation of the system is ensured.

[0047] Optionally, the electric vehicle liquid-cooled power system further includes two bearings 51 and two oil seals 52. The inner rings of the two bearings 51 are respectively sleeved on the two ends of the support shaft 11. The outer rings of the two bearings 51 are respectively connected with the first tight cover 14 and the second tight cover 15. The two oil seals 52 are respectively used to seal the gap between one end of the support shaft 11 and the first tight cover 14 and the gap between the other end of the support shaft 11 and the second tight cover 15.

[0048] The embodiment also provides an electric vehicle, which comprises an electric vehicle body and the electric vehicle liquid cooling power system in the above solution, and the electric vehicle liquid cooling power system is installed on the electric vehicle body. The electric vehicle adopts the arrangement that the controller assembly 2 is arranged on the stator assembly 12, so that the space is used efficiently, and the separate sealing and the shell structure of the controller assembly 2 are omitted, and the integration degree of the electric vehicle liquid cooling power system is improved. Meanwhile, the first flow guide assembly 3 and the second flow guide assembly 4 are arranged, and the flow direction of the insulation cooling liquid in the second circulation flow channel is opposite to the flow direction of the insulation cooling liquid in the first circulation flow channel. When the motor body is in a rotating state, the stator assembly 12 and the controller assembly 2 share the insulation cooling liquid in the containing cavity 16, the first circulation flow channel can drive the insulation cooling liquid to flow to the controller assembly 2, so that the controller assembly 2 is cooled, and the second circulation flow channel can drive the insulation cooling liquid to flow to the stator assembly 12, so that the stator assembly 12 is cooled. In this way, the heat generated by the stator assembly 12 and the controller assembly 2 under high load can be conducted out through the insulation cooling liquid, and the purpose of efficient heat dissipation is achieved. The electric vehicle of the embodiment effectively solves the problems of poor integration degree of the electric vehicle liquid cooling power system and poor heat dissipation effect of the controller under high load in the prior art.

[0049] Obviously, the above embodiment of the present application is merely an example for clearly illustrating the present application, and is not intended to limit the implementation manner of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation manners are not required or can not be exhausted. Any modification, equivalent replacement and improvement made in the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A liquid-cooled power system for an electric vehicle, comprising a motor body (1) and an insulating coolant, wherein the motor body (1) includes a support shaft (11), a stator assembly (12) coaxially sleeved on the support shaft (11), a rotor wheel (13) rotating relative to the stator assembly (12), and a first cover (14) and a second cover (15) respectively connected to both sides of the rotor wheel (13), the rotor wheel (13), the first cover (14) and the second cover (15) forming a receiving cavity (16), wherein the insulating coolant and the stator assembly (12) are both located in the receiving cavity (16), characterized in that, The electric vehicle liquid-cooled power system also includes: A controller component (2) is disposed on the stator component (12); A first flow guiding component (3) is disposed on the first tight cover (14), and the first flow guiding component (3) has a plurality of first circulation channels communicating with the receiving cavity (16); The second flow guiding component (4) is disposed on the second tight cover (15). The second flow guiding component (4) has a plurality of second circulation channels communicating with the receiving cavity (16). The flow direction of the insulating coolant in the second circulation channel is opposite to the flow direction of the insulating coolant in the first circulation channel. When the motor body (1) is rotating, the first circulation channel can drive the insulating coolant to flow to the controller assembly (2), and the second circulation channel can drive the insulating coolant to flow to the stator assembly (12).

2. The electric vehicle liquid-cooled power system according to claim 1, characterized in that, The controller assembly (2) has an inner hole (21) through which the support shaft (11) passes.

3. The electric vehicle liquid-cooled power system according to claim 1, characterized in that, The controller assembly (2) includes a PCB board (22), an aluminum base support plate (23), and a support connector (24). The support connector (24) passes through the PCB board (22) and the aluminum base support plate (23) in sequence and is connected to the stator assembly (12). The support connector (24) separates the PCB board (22) and the aluminum base support plate (23).

4. The electric vehicle liquid-cooled power system according to claim 3, characterized in that, There is a hollow area between the PCB board (22) and the aluminum base support plate (23), and the hollow area is provided with silicone (25).

5. The electric vehicle liquid-cooled power system according to claim 3, characterized in that, The PCB board (22) is electrically connected to the three-phase line of the motor body (1).

6. The electric vehicle liquid-cooled power system according to claim 3, characterized in that, The PCB board (22) is provided with power terminals (222) and motor signal ports (223) spaced apart. The power terminals (222) are covered with insulating washers (2221). The motor signal ports (223) have a temperature control sensor interface. The temperature control sensor is used to detect the temperature of the insulating coolant.

7. The electric vehicle liquid-cooled power system according to claim 6, characterized in that, The PCB board (22) is also provided with a programming port (224) and a wireless communication module (225) at intervals.

8. The electric vehicle liquid-cooled power system according to any one of claims 1-7, characterized in that, The first flow guiding component (3) includes a first flow guiding ring (31) and a plurality of first fan blades (32) and a plurality of first skirt liner rings (33) respectively disposed on both sides of the first flow guiding ring (31). The first skirt liner rings (33) are located on the side of the first flow guiding ring (31) facing the first tight cover (14). The plurality of first fan blades (32) are rotated symmetrically arranged along the axial direction of the first tight cover (14). The first tight cover (14), the first flow guiding ring (31), the plurality of first skirt liner rings (33), and the plurality of first fan blades (32) form a plurality of first circulation channels.

9. The electric vehicle liquid-cooled power system according to claim 8, characterized in that, The second flow guiding assembly (4) includes a second flow guiding ring and a plurality of second fan blades and a plurality of second skirt bushings respectively disposed on both sides of the second flow guiding ring. The second skirt bushings are located on the side of the second flow guiding ring facing the second tight cover (15). The plurality of second fan blades are arranged symmetrically along the axial direction of the second tight cover (15). The second tight cover (15), the second flow guiding ring, the plurality of second skirt bushings, and the plurality of second fan blades form a plurality of second circulation channels.

10. An electric vehicle, characterized in that, It includes an electric vehicle body and an electric vehicle liquid-cooled power system as described in any one of claims 1-9, wherein the electric vehicle liquid-cooled power system is installed on the electric vehicle body.

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