CN115811871A

CN115811871A - Vehicle hub motor controller

Info

Publication number: CN115811871A
Application number: CN202211544964.3A
Authority: CN
Inventors: 曾运运; 蔡甲春; 沈韬; 齐亮
Original assignee: Dongfeng Electric Drive Systems Co Ltd
Current assignee: Dongfeng Electric Drive Systems Co Ltd
Priority date: 2022-12-03
Filing date: 2022-12-03
Publication date: 2023-03-17

Abstract

The invention relates to a vehicle in-wheel motor controller, which comprises: a box body; the control panel is arranged inside the box body and is simultaneously connected with at least two power modules, and the power modules are used for being correspondingly connected with wheel hub driving motors of the vehicle one by one; the water cooling module is detachably arranged inside the box body; the power module is installed on the water cooling module, and the water cooling module is matched with the power module. The invention realizes that one motor controller controls a plurality of hub driving motors, and saves the installation space and cost of the whole vehicle. And different water-cooling modules can be developed to adapt to the change of the power module, the box body does not need to be re-developed while the heat dissipation of the power module is ensured, the cost for developing the water-cooling module is much lower, other related parts can be continuously borrowed, the development period and the cost of the vehicle hub motor controller are greatly reduced, and the compatibility of the controller is improved.

Description

Vehicle hub motor controller

Technical Field

The invention relates to the field of motor control, in particular to a vehicle hub motor controller.

Background

The hub drive is gradually applied and popularized in the field of electric vehicles in recent years, and the scheme is that a drive motor is directly integrated with a vehicle hub, the motor directly drives wheels to run, intermediate transmission and speed change parts are omitted, and the hub drive has the advantages of low cost, high efficiency, good maneuvering performance and the like. The hub driving motor has the characteristic of independent driving of a single wheel, so that the front driving, the rear driving or the four-wheel driving of the vehicle can be conveniently realized.

However, since the hub drive is only a single wheel drive, the entire vehicle needs to carry two or four drive motors. If the conventional driving motor and motor controller one-to-one matching mode is continuously adopted, the number of the motor controllers is directly increased, the cost of the whole vehicle is increased, and the low-cost advantage of hub driving cannot be embodied.

Meanwhile, due to the difference of different technical indexes and use habits of different customers, the performance indexes of the motor controller are different, the motor controller is usually required to be customized and developed to meet the requirements of the customers, and the requirements of the customers cannot be quickly responded. Therefore, the motor controller also has the problems of high development cost, long development period, poor compatibility and the like at present.

Therefore, it is necessary to design a hub motor controller with low cost, high compatibility and wide application range.

Disclosure of Invention

The embodiment of the invention provides a vehicle hub motor controller which has the advantages of low cost, compact structure, strong compatibility, wide application range and the like, and solves the problems of high cost, long development period and poor universality of vehicle hub driving in the related technology.

In a first aspect, a vehicle in-wheel motor controller is provided, comprising: a box body; the control panel is arranged inside the box body and is simultaneously connected with at least two power modules, and the power modules are used for being correspondingly connected with hub driving motors of a vehicle one by one; the water cooling module is detachably arranged inside the box body; the power module is arranged on the water cooling module, and the water cooling module is matched with the power module.

In some embodiments, the water cooling module is provided with a cavity for storing cooling liquid, the cavity is communicated with a water pipe, and the water pipe is used for extending out of the box and communicating with an external cooling liquid pipeline.

In some embodiments, the water cooling module is provided with heat dissipation holes; the power module is provided with a first heat dissipation protrusion, and the first heat dissipation protrusion is inserted into the heat dissipation hole and extends into the cavity.

In some embodiments, a plurality of the first heat dissipation protrusions are spaced apart from the heat dissipation area of the power module, and the shape of the heat dissipation hole corresponds to the shape of the heat dissipation area.

In some embodiments, the water cooling module is provided with a first mounting plate at the edge of the heat dissipation hole, the first mounting plate is provided with a sealing groove, and the sealing groove surrounds the heat dissipation hole for a circle; the vehicle hub motor controller further comprises a sealing ring, wherein the sealing ring is embedded in the sealing groove to seal a gap between the power module and the water cooling module.

In some embodiments, the power module is provided with a first heat dissipation plate; the water cooling module is provided with a second heating panel attached to the first heating panel, one side of the second heating panel far away from the power module is provided with a second heat dissipation protrusion, and the second heat dissipation protrusion is inserted into the cavity and contacts with the cooling liquid.

In some embodiments, the water cooling module is provided with a process hole at a side far away from the first heat dissipation plate, and a cover plate is installed at the process hole to seal the process hole.

In some embodiments, the water cooling modules are provided with cavities corresponding to the power modules in number, and the cavities are communicated with one another.

In some embodiments, a thin-film capacitor is further arranged in the box body, one end of the thin-film capacitor is connected with all the power modules, the other end of the thin-film capacitor is connected with a direct-current copper bar, one side, far away from the thin-film capacitor, of the direct-current copper bar is connected with a direct-current plug connector, and the direct-current plug connector is used for being connected with a vehicle battery or a power distribution unit.

The technical scheme provided by the invention has the beneficial effects that:

the embodiment of the invention provides a vehicle hub motor controller, which can control a plurality of power modules through one control board simultaneously, thereby realizing the control of a plurality of hub driving motors, reducing the number of control boards and reducing the number of box bodies. The control of a plurality of hub driving motors of the vehicle is realized through one hub motor controller, so that the cost of the vehicle is reduced, and the occupation of the internal space of the vehicle is also reduced. Meanwhile, the power module is cooled through the detachable water cooling module, different water cooling modules can be developed to adapt to the change of the power module, the power module is guaranteed to be cooled, the box body does not need to be developed again, and compared with the box bodies with various quantities, the cost for developing the water cooling modules is greatly reduced. To sum up, the application provides a vehicle wheel hub motor controller, its development cost and the cycle that can reduce vehicle wheel hub motor controller by a wide margin.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of a vehicle hub motor controller according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a case and a cooling module of a vehicle in-wheel motor controller according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an explosion structure of a water cooling module and two power modules according to an embodiment of the present invention;

fig. 4 is a schematic top view of a water-cooling module with heat dissipation holes according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power module with a first heat dissipating protrusion according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a power module with a first heat dissipation plate according to an embodiment of the present invention;

fig. 7 is a schematic top view of a water-cooling module with heat dissipating protrusions installed in a box according to an embodiment of the present invention.

1. A box body; 11. a main body; 111. a column; 112. a via hole; 12. an upper cover; 13. a DC connector; 14. a three-phase plug connector; 15. a venting plug;

2. a water cooling module; 21. a cavity; 22. heat dissipation holes; 23. a first mounting plate; 231. a sealing groove; 24. a second mounting plate; 241. mounting holes; 25. a water inlet and outlet;

3. a power module; 31. arranging wires; 32. a drive plate; 33. an IGBT module; 34. a first heat dissipating protrusion; 35. a first heat dissipation plate;

4. a water pipe;

51. a thin film capacitor; 52. a capacitor hoop;

6. a low voltage plug connector;

7. fastening screws;

81. a control panel; 82. a shield plate; 83. a current sensor; 84. a three-phase copper bar; 85. and (6) a direct current copper bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The embodiment of the invention provides a vehicle hub motor controller, which has the advantages of low cost, compact structure, strong compatibility, wide application range and the like, and can solve the problems of high cost, long development period and poor universality of vehicle hub driving in the related technology.

Referring to fig. 1 and 3, an embodiment of the present invention provides a vehicle hub motor controller, which may include: a box body 1; the control panel 81 is installed inside the box body 1, the control panel 81 is simultaneously connected with at least two power modules 3, and the power modules 3 are used for being connected with wheel hub driving motors of a vehicle in a one-to-one correspondence manner; the water cooling module 2 is detachably arranged in the box body 1; the power module 3 is arranged on the water cooling module 2, and the water cooling module 2 is matched with the power module 3. A plurality of power module 3 are connected through a control panel 81, realize one and drag many configurations, have reduced the quantity of control panel 81 and box 1, and the control of a plurality of wheel hub driving motor is realized to a controller of vehicle accessible, have reduced vehicle wheel hub motor controller's cost to save whole car installation space, reduced the actuating system cost. In this embodiment, the control board 81 is connected to two power modules 3 at the same time, so as to implement a one-driving-two configuration, and in other embodiments, the control board 81 may be connected to a greater number of power modules 3 according to the number of hub driving motors in the vehicle, so as to implement a one-driving-many configuration. Because the water cooling module 2 is detachably arranged in the box body 1, the water cooling module 2 is independently produced, so that the water cooling module 2 is independently separated from the box body 1 connected with the outside, when the vehicle hub motor controller adopts IGBT modules 33 or SiC modules with different packaging structures or different power grades, a new box body 1 does not need to be produced, only the water cooling module 2 matched with the power module 3 needs to be designed, the cooling of the power module 3 can be realized, and the development period and the cost of the vehicle hub motor controller are greatly reduced. When the power module is used, the water cooling module 2 matched with the power module 3 is installed in the box body 1, and then the power module 3 is installed on the water cooling module 2. For a vehicle user, if the power module 3 needs to be upgraded subsequently, the matched upgrading of the vehicle hub motor controller cooling structure can be realized by replacing the matched water cooling module 2, and the upgrading cost of the vehicle user is reduced.

Referring to fig. 1 to 3, in some alternative embodiments, the water cooling module 2 is provided with a cavity 21 for storing cooling liquid, the cavity 21 is communicated with a water pipe 4, and the water pipe 4 is used for extending out of the tank 1 and communicating with an external cooling liquid pipeline. That is, the water cooling module 2 cools the coolant power module 3 through the communication water pipe 4. Wherein, the water cooling module 2 is provided with a water inlet and outlet 25, one end of the water pipe 4 is inserted into the water inlet and outlet 25 and connected with the water cooling module 2, and the other end is inserted into the via hole 112 of the box body 1 and extends out of the box body 1 to be connected with an external cooling liquid pipeline. During the assembly process, the water cooling module 2 can be installed in the box body 1, the water pipe is inserted into the through hole 112 of the box body 1, and the water pipe 4 is inserted into the water inlet and outlet 25 of the water cooling module 2. As can be seen from fig. 2 and fig. 3, the water cooling module 2 is provided with two water inlets and outlets 25, and the two water inlets and outlets 25 are respectively disposed at two ends of the water cooling module 2 in the length direction, so that when an external cooling liquid pipeline circulates, the cooling liquid in the cavity 21 can be driven to flow, the heat of the power module 3 is taken away, and the power module 3 is cooled. Wherein, the water pipe 4 and the water inlet and outlet 25 of the water cooling module 2 are sealed to avoid the leakage of the cooling liquid into the box body 1. The cooling liquid can be water, and can also be other liquids used for cooling.

Referring to fig. 3 to 5, in some alternative embodiments, the water cooling module 2 is provided with heat dissipation holes 22; the power module 3 is provided with a first heat dissipation protrusion 34, and the first heat dissipation protrusion 34 is inserted into the heat dissipation hole 22 and extends into the cavity 21, so that the power module 3 is directly contacted with the cooling liquid, and the cooling effect of the water cooling module 2 on the power module 3 is improved. In this embodiment, the power module 3 is provided with a plurality of first heat dissipation protrusions 34 arranged at intervals, so that the contact area between the power module 3 and the cooling liquid is realized, and the cooling effect on the power module 3 is further improved.

Referring to fig. 3 to 5, in some alternative embodiments, a plurality of first heat dissipation protrusions 34 are spaced apart from the heat dissipation area of the power module 3, and the shape of the heat dissipation hole 22 corresponds to the shape of the heat dissipation area. The requirement that all the first radiating protrusions 34 are inserted into the same radiating hole 22 can be met, and the manufacturing cost and the processing difficulty of the water cooling module 2 are reduced.

Referring to fig. 3 and 4, in some alternative embodiments, the water cooling module 2 is provided with a first mounting plate 23 at an edge of the heat dissipation hole 22, the first mounting plate 23 is provided with a sealing groove 231, and the sealing groove 231 surrounds the heat dissipation hole 22 for a circle; the vehicle hub motor controller further comprises a sealing ring, wherein the sealing ring is embedded in the sealing groove 231 and seals a gap between the power module 3 and the water cooling module 2. That is, the seal groove 231 is provided with a seal ring to seal the gap between the power module 3 and the water cooling module 2, thereby preventing the coolant from overflowing. In this embodiment, the power module 3 and the first mounting plate 23 are provided with corresponding mounting holes, the power module 3 and the water-cooling module 2 are connected by screws, and the power module 3 is pressed on the water-cooling module 2, so that the sealing performance between the water-cooling module 2 and the power module 3 is ensured.

Referring to fig. 1, 2, 6 and 7, in some alternative embodiments, the power module 3 is provided with a first heat sink 35; water cooling module 2 be equipped with the second heating panel of the laminating of first heating panel 35, the second heating panel is kept away from one side of power module 3 is equipped with the second heat dissipation arch, the second heat dissipation arch is inserted contact with the coolant liquid in the cavity 21. As shown in fig. 6, in some embodiments, the power module 3 is attached to the water cooling module 2 through a first heat dissipation plate 35 having a flat plate shape, and in order to improve the heat dissipation effect of the power module 3, second heat dissipation protrusions are provided on a second heat dissipation plate attached to the first heat dissipation plate 35, and the second heat dissipation protrusions are inserted into the cavity 21 to contact with the coolant, so that heat on the first heat dissipation plate 35 is guided to the coolant. The second heat dissipation projection can also be in a needle shape, a strip shape, a water drop shape and the like. Meanwhile, a heat conducting medium is coated between the second heat dissipation plate of the water cooling module 2 and the first heat dissipation plate 35 of the power module, so that the heat conduction capability is enhanced.

Referring to fig. 7, in some alternative embodiments, the water cooling module 2 is provided with a process hole at a side far from the first heat dissipation plate 35, and a cover plate is installed at the process hole. Through the fabrication hole of water cooling module 2, can process the second heat dissipation arch at the second heating panel back, treat the protruding processing back of second heat dissipation, through apron sealed fabrication hole, avoid the coolant liquid to reveal in the water cooling module 2. In this embodiment, the cover plate is welded to the water-cooling module 2 in a friction welding manner, and is integrated with the water-cooling module 2 to seal the fabrication hole.

Referring to fig. 2 to 4, in some alternative embodiments, the water-cooling modules 2 are provided with cavities 21 corresponding to the number of the power modules 3, and the cavities 21 are communicated with each other. That is to say, by providing a plurality of power modules 3, it is possible to control a plurality of hub driving motors by one hub motor controller, in this embodiment, two power modules 3 are provided in one box 1 to achieve the effect of one driving two, and control two hub driving motors at the same time. Through installing a plurality of power module 3 in same water-cooling module 2, reduce the structure of water pipe 4 in box 1, only can realize the cooling to a plurality of power module 3 through a water-cooling module 2.

Referring to fig. 1, in some alternative embodiments, a thin film capacitor 51 is further disposed in the box 1, one end of the thin film capacitor 51 is connected to all the power modules 3, the other end of the thin film capacitor 51 is connected to a dc copper bar 85, one side of the dc copper bar 85 away from the thin film capacitor 51 is connected to a dc connector 13, and the dc connector 13 is used for connecting to a vehicle battery or a power distribution unit. In this embodiment, shunt and energy storage are realized through the thin film capacitor 51, the electric energy of the vehicle battery is synchronously transmitted to the two independent power modules 3, the two power modules 3 respectively receive the signal of the control board 81, and the two paths of three-phase alternating currents are independently output by controllable inversion direct currents. And then respectively transmitted to two hub driving motors through the three-phase copper bar 84 and the three-phase plug connector 14, thereby realizing the one-driving-two motor controller configuration.

Referring to fig. 2 to 4, the water cooling module 2 is installed at the bottom of the tank 1, and the water cooling module 2 is provided with an installation hole 241, and is connected with a threaded hole at the bottom of the tank 1 by a fastening screw 7 penetrating through the installation hole 241, so that the water cooling module 2 is fixed at the bottom of the tank 1. In other embodiments, the water cooling module 2 can be mounted on the box 1 by other detachable connection methods, such as clamping and bonding.

Referring to fig. 1 and 2, a pillar 111 is provided at the bottom of the housing 1, and the pillar 111 supports the shield plate 82.

Referring to fig. 1 to 6, the box 1 includes a main body 11 and an upper cover 12, wherein the water cooling module 2 and the power module 3 are both installed in an accommodating space enclosed by the main body 11, and the upper cover 12 covers the top of the main body 11 to form the closed box 1. The box body 1 is provided with a direct current plug connector 13 and a three-phase plug connector 14 which are communicated with the outside, and a power source and a wheel hub driving motor are respectively connected through a high-voltage wire harness. The box body 1 is also provided with a ventilation plug 15 to realize the balance of the internal pressure and the external pressure of the box body 1.

Referring to fig. 1 and 3, the power module 3 includes an IGBT module 33 or a SiC module and a driving board 32, a flat cable 31 is disposed on the driving board 32, the flat cable 31 passes through a shielding plate 82 to flexibly connect the control board 81 and the driving board 32, and the flat cable 31 is used for transmitting communication and protection signals between the control board 81 and the driving board 32. The control board 81 mainly functions in signal receiving, operation and output, and the driving board 32 drives the IGBT module 33 or the SiC module to be turned on and off according to the output signal of the control board 81, so as to invert the direct current to the alternating current. In this embodiment, the power module 3 is an IGBT module 33 or a SiC module, but in other embodiments, a SiC module may be used. Because the direct current plug connector 13 is arranged on the box body 1, the direct current plug connector 13 is connected with the thin film capacitor 51 through the direct current copper bar 85, and the capacitor hoop 52 is arranged on the thin film capacitor 51 to fix the thin film capacitor 51. The power battery or the power distribution unit inputs direct current through the direct current plug connector 13 of the motor controller, energy storage and shunt are achieved through the thin-film capacitor 51, electric energy is synchronously transmitted to the power module 3, the power module 3 receives signals of the control panel 81, controllable inversion direct current is conducted, three-phase alternating current is independently output and transmitted to the three-phase plug connector 14 through the three-phase copper bar 84, wherein the three-phase copper bar 84 penetrates through the current sensor 83, one end of the three-phase copper bar is connected with the power module 3, and the other end of the three-phase plug connector 14 is connected with the other end of the three-phase plug connector. An external motor is connected with the three-phase plug connector 14 through a high-voltage wire harness, so that the power module 3 is connected with the motor. In this embodiment, the low-voltage plug connector 6 is disposed on the control board 81 and extends out of the case 1 for receiving various control signals provided by the external VCU and the motor of the whole vehicle. In this embodiment, the control board 81 is connected to the two power modules 3 through a flat cable, and the two power modules 3 respectively control one hub driving motor, thereby realizing a one-to-two configuration of the control board 81.

The principle of the vehicle hub motor controller provided by the embodiment of the invention is as follows:

the centralized arrangement of the multiple power modules 3 is adopted, and the multiple power modules 3 are connected through one control board 81, so that one motor controller controls multiple hub driving motors, the number of the motor controllers required by a hub driving system is reduced, the installation space is saved, and the cost of the whole vehicle is reduced. The motor controller adopts a one-driving-multiple configuration, so that the use number of parts such as the control panel 81, the box body 1 and the like is reduced, and the cost of the motor controller is also reduced. By designing the water cooling module 2 independently from the case 1, the water cooling module 2 for cooling the power module 3 can be produced independently. Compared with the water cooling structure arranged on the box body 1, when the box body 1 is adapted to different power modules 3, the box body 1 can be prevented from being re-developed, and only the water cooling modules 2 with different structures or different specifications are replaced. Because the water cooling module 2 only needs to realize the cooling effect, compare and need realize that support, box 1 structure of plug connector installation is simpler and the volume is littleer. Compared with the newly opened box body 1, the newly opened water cooling module 2 is lower in cost, and the development period and the cost of the vehicle hub motor controller are reduced.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle in-wheel motor controller, comprising:

a box body (1);

the control panel (81) is installed inside the box body (1), the control panel (81) is simultaneously connected with at least two power modules (3), and the power modules (3) are used for being connected with hub driving motors of vehicles in a one-to-one correspondence mode;

the water cooling module (2), the water cooling module (2) is detachably mounted in the box body (1);

the power module (3) is installed on the water cooling module (2), and the water cooling module (2) is matched with the power module (3).

2. The vehicle in-wheel motor controller of claim 1, wherein:

the water cooling module (2) is provided with a cavity (21) for storing cooling liquid, the cavity (21) is communicated with a water pipe (4), and the water pipe (4) is used for extending to the outside of the box body (1) and communicated with an external cooling liquid pipeline.

3. The vehicle in-wheel motor controller of claim 2, wherein:

the water cooling module (2) is provided with heat dissipation holes (22);

the power module (3) is provided with a first heat dissipation protrusion (34), and the first heat dissipation protrusion (34) is inserted into the heat dissipation hole (22) and extends to the cavity (21).

4. The vehicle in-wheel motor controller of claim 3, wherein:

the heat dissipation structure is characterized in that a plurality of first heat dissipation bulges (34) are arranged at intervals among the heat dissipation areas of the power module (3), and the shapes of the heat dissipation holes (22) correspond to the shapes of the heat dissipation areas.

5. The vehicle in-wheel motor controller of claim 3, wherein:

the water cooling module (2) is provided with a first mounting plate (23) at the edge of the heat dissipation hole (22), the first mounting plate (23) is provided with a sealing groove (231), and the sealing groove (231) surrounds the heat dissipation hole (22) for a circle;

the vehicle hub motor controller further comprises a sealing ring, wherein the sealing ring is embedded in the sealing groove (231) to seal a gap between the power module (3) and the water cooling module (2).

6. The vehicle in-wheel motor controller of claim 2, wherein:

the power module (3) is provided with a first heat dissipation plate (35);

the water cooling module (2) is provided with a second heating panel attached to the first heating panel (35), the second heating panel is far away from one side of the power module (3) and is provided with a second heat dissipation protrusion, and the second heat dissipation protrusion is inserted into the cavity (21) and is in contact with the cooling liquid.

7. The vehicle in-wheel motor controller of claim 6, wherein:

the water cooling module (2) is provided with a fabrication hole on one side far away from the first heat dissipation plate (35), and the fabrication hole is provided with a cover plate for sealing the fabrication hole.

8. The vehicle in-wheel motor controller of claim 2, wherein:

the water cooling module (2) is provided with cavities (21) corresponding to the power modules (3) in number, and the cavities (21) are communicated with one another.

9. The vehicle in-wheel motor controller of claim 1, wherein:

still be equipped with film capacitor (51) in box (1), film capacitor (51) one end is connected with whole power module (3), and the other end is connected with direct current copper bar (85), keep away from direct current copper bar (85) one side of film capacitor (51) is connected with direct current plug connector (13), direct current plug connector (13) are used for linking to each other with vehicle battery or power distribution unit.