Motor controller, electric assembly and vehicle

Abstract

The utility model relates to a motor controller, an electric assembly and a vehicle, the motor controller comprises a box body and an electric control device, a containing cavity and a welding plate are arranged in the box body, the welding plate is arranged in the containing cavity and connected to the inner wall of the box body, and the electric control device is arranged in the containing cavity and connected with the welding plate in a welded mode. The electric control device comprises a heat dissipation module, a liquid inlet pipe, a liquid outlet pipe and a power module, a cavity is formed in the heat dissipation module, a cooling medium is arranged in the cavity, the liquid inlet pipe and the liquid outlet pipe are both communicated with the cavity, a liquid inlet hole and a liquid outlet hole are further formed in the box body, the liquid inlet pipe is arranged in the liquid inlet hole in a penetrating mode, and the liquid outlet pipe is arranged in the liquid outlet hole in a penetrating mode. Heat dissipation modules are arranged on the two opposite sides of the power module, and the power module and the heat dissipation modules are arranged in an attached mode. Due to the fact that the electric control device is connected with the welding plate in the welding mode, the position of the welding plate in the containing cavity is adjustable, the arrangement of the electric control device is not limited by the shape and the internal space of the box body, and the box can adapt to different box bodies.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular, to a motor controller, an electric assembly and a vehicle. Background Art

[0002] The power module is a package that combines power electronic components into a whole according to certain functional combinations, and has the advantages of small size and high power density. At present, the main heat dissipation method for power semiconductor devices is still single-sided water cooling and air cooling. As the requirements for power density in new energy vehicles and other fields continue to increase, the power of power semiconductor devices continues to increase, and the demand for heat dissipation also increases. Conventional heat dissipation methods are difficult to meet the requirements. Utility Model Content

[0003] The purpose of the present disclosure is to provide a motor controller, an electric assembly and a vehicle to solve the technical problems existing in the related art.

[0004] In order to achieve the above-mentioned object, the first aspect of the present disclosure provides a motor controller, comprising a box and an electric control device, wherein the box has a receiving cavity and a welding plate inside, the welding plate is arranged in the receiving cavity and connected to the inner wall of the box, and the electric control device is arranged in the receiving cavity and is welded to the welding plate;

[0005] The electronic control device comprises:

[0006] A heat dissipation module, wherein the heat dissipation module has a cavity inside, and the cavity contains a cooling medium;

[0007] A liquid inlet pipe and a liquid outlet pipe, both of which are connected to the cavity, and a liquid inlet hole and a liquid outlet hole are formed on the box body, the liquid inlet pipe is inserted into the liquid inlet hole, and the liquid outlet pipe is inserted into the liquid outlet hole;

[0008] The power module is provided with the heat dissipation modules on opposite sides of the power module, and the power module and the heat dissipation modules are arranged in close contact with each other.

[0009] Optionally, a side of the heat dissipation module close to the welding plate is welded to the welding plate.

[0010] Optionally, the motor controller also includes at least one connecting pipe, which is connected to a side of the heat dissipation module close to the power module and communicates with the cavity. The connecting pipes of two adjacent power modules are arranged opposite to each other and can be connected when the two power modules are attached to both sides of the power modules.

[0011] Optionally, the motor controller further comprises a sealing member, wherein the sealing member seals and connects the two oppositely arranged connecting pipes.

[0012] Optionally, the heat dissipation module has a first heat dissipation surface and a second heat dissipation surface that are arranged opposite to each other, the power modules are arranged on opposite sides of the heat dissipation module, the first heat dissipation surface is arranged to fit one of the power modules, and the second heat dissipation surface is arranged to fit another of the power modules.

[0013] Optionally, the liquid inlet pipe and the liquid outlet pipe are arranged on the same side of the heat dissipation module; or,

[0014] The liquid inlet pipe and the liquid outlet pipe are arranged on different sides of the heat dissipation module.

[0015] Optionally, the power module is sintered and connected to the outer peripheral surface of the heat dissipation module.

[0016] Optionally, the electronic control device also includes a connector, which is arranged between two adjacent heat dissipation modules, and one end of the connector is connected to the heat dissipation module located on one side of the power module, and the other end of the connector is connected to the heat dissipation module located on the other side of the power module.

[0017] Optionally, the connecting member is connected to the heat dissipation module by welding.

[0018] Optionally, the thickness of the connecting member is less than or equal to the thickness of the power module.

[0019] Optionally, a plurality of power modules are arranged between two adjacent heat dissipation modules, and the plurality of power modules are arranged at intervals along the length direction or the width direction of the heat dissipation module, and one side of each power module is fitted with one of the two adjacent heat dissipation modules, and the other side of each power module is fitted with the other of the two adjacent heat dissipation modules.

[0020] Optionally, the motor controller also includes a connecting tube, which is arranged between two adjacent power modules, and one end of the connecting tube is connected to the cavity inside one of the two adjacent heat dissipation modules, and the other end of the connecting tube is connected to the cavity inside the other of the two adjacent heat dissipation modules.

[0021] Optionally, the box body also includes a partition, which is arranged in the accommodating cavity and divides the accommodating cavity into a first chamber and a second chamber, the motor controller is arranged in the first chamber, and the heat dissipation module is welded to the partition on one side close to the partition.

[0022] A second aspect of the present disclosure provides an electric assembly, including a motor, a transmission, and the motor controller as described above.

[0023] A third aspect of the present disclosure provides a vehicle, comprising the motor controller as described above or the electric assembly as described above.

[0024] Through the above technical solution, on the one hand, heat dissipation modules are provided on both sides of the power module, which increases the heat dissipation area between the power module and the heat dissipation module, thereby effectively improving the heat dissipation effect of the power module. On the other hand, the power module is directly attached to the heat dissipation module, and there is no need to set a flow channel for heat dissipation of the power module on the box, so it can also reduce the design and processing requirements of the above box, and reduce the difficulty and cost of box development.

[0025] Furthermore, since the electronic control device is welded to the welding plate, the specific layout requirements of the electronic control device can be met by adjusting the specific position of the welding plate in the accommodating cavity. It is not restricted by the shape of the box and the internal space, and the layout of the electronic control device is more flexible and can adapt to different boxes.

[0026] In addition, because the above-mentioned power module and heat dissipation module are spliced ​​into one module, users can selectively increase or decrease the number of power modules and heat dissipation modules to adapt to different heat dissipation requirements. Moreover, when a module (power module or heat dissipation module) fails, only the corresponding module needs to be replaced, which can effectively reduce maintenance costs.

[0027] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0029] Figure 1 is a three-dimensional schematic diagram of a motor controller provided by another exemplary embodiment of the present disclosure;

[0030] Figure 2 is a front view schematic diagram of an electric control device provided by an exemplary embodiment of the present disclosure, wherein heat dissipation modules are provided on opposite sides of a power module, and a power module is sandwiched between the two heat dissipation modules;

[0031] Figure 3 It is a front view schematic diagram of an electric control device provided by another exemplary embodiment of the present disclosure, wherein heat dissipation modules are provided on opposite sides of the power module, and two power modules are clamped between the two heat dissipation modules.

[0032] Description of Reference Numerals

[0033] 1-heat dissipation module; 10-cavity; 11-first heat dissipation surface; 12-second heat dissipation surface; 13-heat dissipation fins; 2-power module; 3-connector; 4-connecting pipe; 5-seal; 6-liquid inlet pipe; 7-liquid outlet pipe; 8-connecting pipe; 100-motor controller; 110-housing; 111-accommodating chamber; 1110-first chamber; 1111-second chamber; 112-liquid inlet hole; 113-liquid outlet hole; 114-partition; 115-welding plate; 116-capacitor; 117-connecting plate; 200-electrically controlled device. DETAILED DESCRIPTION

[0034] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0035] In the present disclosure, unless otherwise stated, the directional words used are only for the convenience of describing the present disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, they cannot be understood as limitations on the present disclosure. The terms "inside and outside" refer to the inside and outside of the corresponding structural contour.

[0036] In addition, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another element, and do not have order or importance. In addition, in the description with reference to the drawings, the same number in different drawings represents the same element.

[0037] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0038] refer to Figures 1 to 3As shown, the first aspect of the present disclosure provides a motor controller 100, including a box body 110 and an electronic control device 200. The box body 110 has a accommodating cavity 111 and a welding plate 115 inside. The welding plate 115 is arranged in the accommodating cavity 111 and connected to the inner wall of the box body 110. The electronic control device 200 is arranged in the accommodating cavity 111 and is welded to the welding plate 115; the electronic control device 200 includes a heat dissipation module 1, a liquid inlet pipe 6, a liquid outlet pipe 7 and a power module 2. The heat dissipation module 1 has a cavity 10 inside, and the cavity 10 has a cooling medium; the liquid inlet pipe 6 and the liquid outlet pipe 7 are both connected to the cavity 10, and the box body 110 is also formed with a liquid inlet hole 112 and a liquid outlet hole 113, the liquid inlet pipe 6 is penetrated in the liquid inlet hole 112, and the liquid outlet pipe 7 is penetrated in the liquid outlet hole 113; the heat dissipation modules 1 are arranged on opposite sides of the power module 2, and the power module 2 is arranged in close contact with the heat dissipation module 1.

[0039] Through the above technical solution, on the one hand, heat dissipation modules 1 are provided on both sides of the power module 2, which increases the heat dissipation area between the power module 2 and the heat dissipation module 1, thereby effectively improving the heat dissipation effect of the power module 2. On the other hand, the power module 2 is directly attached to the heat dissipation module 1, and there is no need to set a flow channel for heat dissipation of the power module 2 on the box 110, so it can also reduce the design and processing requirements of the above box 110 (such as there is no need to set a flow channel for heat dissipation of the power module 2 on the box 110), reducing the difficulty and cost of developing the box 110.

[0040] Furthermore, since the electronic control device 200 is welded to the welding plate, the specific layout requirements of the electronic control device can be met by adjusting the specific position of the welding plate in the accommodating cavity. It is not limited by the shape of the box and the internal space, and the layout of the electronic control device is more flexible and can adapt to different boxes.

[0041] In addition, precisely because the above-mentioned power module 2 and heat dissipation module 1 are spliced ​​into one module, the user can selectively increase or decrease the number of power modules 2 and heat dissipation modules 1, so as to adapt to the heat dissipation requirements of motor controllers 100 of different powers, and when a module (power module 2 or heat dissipation module 1) fails, only the corresponding module needs to be replaced, which can effectively reduce maintenance costs.

[0042] It should be noted that the power semiconductor devices of the power module 2 mentioned above include but are not limited to insulated gate bipolar transistors and thyristors.

[0043] In an exemplary embodiment provided by the present disclosure, the side of the heat dissipation module 1 close to the welding plate 115 is welded to the welding plate 115. It is precisely because the motor controller 100 is welded to the welding plate 115 through the side of the heat sink close to the welding plate 115, that is, there is no need to perform welding operations on the power module 2, and there is no need to connect the power module 2 to the welding plate 115, which can avoid damage to components on the power module 2 or short circuits with structures such as the welding plate 115 and the box 110, thereby further improving the stability of the power module 2.

[0044] Alternatively, if Figures 2 to 3 As shown, the motor controller 100 further includes at least one connecting pipe 4, which is connected to the side of the heat dissipation module 1 close to the power module 2 and communicates with the cavity 10. The connecting pipes 4 of two adjacent power modules 2 are arranged opposite to each other and can be communicated when the two power modules 2 are attached to the two sides of the power module 2. In this way, when the two heat dissipation modules 1 are attached to the power module 2 from the two sides of the power module 2 respectively, the two connecting pipes 4 arranged opposite to each other can be communicated so that the cooling medium in the two heat dissipation modules 1 can be connected through the connecting pipe 4, and the cooling medium can circulate in different heat dissipation modules 1, reducing the setting of the cooling medium inlet and outlet pipes and other structures, and simplifying the overall structure of the motor controller 100.

[0045] Alternatively, if Figures 2 to 3 As shown, the motor controller 100 further includes a seal 5, which seals and connects two oppositely disposed connecting pipes 4. Thus, when the two connecting pipes 4 are butted, the seal 5 can be seal-connected at the connection of the two connecting pipes 4, thereby improving the sealing performance between the two connecting pipes 4 and preventing the cooling medium from leaking from the connection between the two connecting pipes 4.

[0046] In an exemplary embodiment provided in the present disclosure, the above-mentioned seal 5 can be a sealing ring, which is wrapped around the connection between the two connecting pipes 4 to achieve a sealing effect. Alternatively, in another exemplary embodiment provided in the present disclosure, the above-mentioned seal 5 can also be a sealing tape, a flange, etc. In short, as long as the sealing effect between the two connecting pipes 4 can be achieved, the specific structure and sealing method of the above-mentioned seal 5 in the present disclosure are not limited.

[0047] Alternatively, if Figures 2 to 3As shown, the heat dissipation module 1 has a first heat dissipation surface 11 and a second heat dissipation surface 12 which are arranged opposite to each other, and power modules 2 are arranged on opposite sides of the heat dissipation module 1, the first heat dissipation surface 11 is arranged in abutment with one power module 2, and the second heat dissipation surface 12 is arranged in abutment with another power module 2. In other words, the heat dissipation module 1 can simultaneously dissipate heat for two power modules 2 located on both sides thereof, and can further increase the contact area between the heat dissipation module 1 and the power module 2 without increasing the number of the heat dissipation modules 1, thereby improving the heat dissipation efficiency of the heat dissipation module 1 and the heat dissipation effect of the heat dissipation module 1 on the power module 2.

[0048] Furthermore, since the heat dissipation effect on the power module 2 can be improved without increasing the number of heat dissipation modules 1, the volume occupied by the heat dissipation module 1 can be further reduced, which is more conducive to improving the integration of the motor controller 100.

[0049] Here, it should be noted that, for the embodiment in which the heat dissipation module 1 is fitted on both sides of the power module 2 and the power module 2 is fitted on both sides of the heat dissipation module 1, Figures 1 to 3 As shown, it can be understood that the multiple heat dissipation modules 1 and the multiple power modules 2 are in an alternating overlapping state, each heat dissipation module 1 can dissipate heat for two power modules 2 , and each power module 2 is dissipated by two heat dissipation modules 1 .

[0050] Moreover, during the specific assembly process of the heat dissipation module 1 and the power module 2, the number of heat dissipation modules 1 can also be selected according to the specific type of the motor controller 100. Specifically, for a motor controller 100 with more power modules 2, a corresponding number of heat dissipation modules 1 can be set to match the number of power modules 2 of the motor controller 100. For a motor controller 100 with fewer power modules 2, the number of heat dissipation modules 1 can be adaptively reduced to match the heat dissipation requirements of different motor controllers 100.

[0051] In addition, in order to further improve the heat dissipation effect, such as Figures 2 to 3 As shown, heat dissipation fins 13 are further arranged in the cavity 10 of the heat dissipation module 1 .

[0052] Alternatively, if Figures 1 to 3 As shown, in an exemplary embodiment provided by the present disclosure, the liquid inlet pipe 6 and the liquid outlet pipe 7 are arranged on the same side of the heat dissipation module 1; or, in another exemplary embodiment provided by the present disclosure, the liquid inlet pipe 6 and the liquid outlet pipe 7 can also be arranged on different sides of the heat dissipation module 1. In short, the present application does not limit the specific arrangement positions of the above-mentioned liquid inlet pipe 6 and the liquid outlet pipe 7, which can be selected according to the specific installation method and the space of the box body 110.

[0053] For the embodiment in which the heat dissipation module 1 has a first heat dissipation surface 11 and a second heat dissipation surface 12 arranged opposite to each other, as shown in FIG. Figure 2 As shown, the liquid inlet pipe 6 and the liquid outlet pipe 7 can be connected to the first heat dissipation surface 11, and the liquid inlet pipe 6 and the liquid outlet pipe 7 can also be connected to the second heat dissipation surface 12, or, as shown in FIG. Figure 3 As shown, one of the liquid inlet pipe 6 and the liquid outlet pipe 7 is connected to the first heat dissipation surface 11 , and the other of the liquid inlet pipe 6 and the liquid outlet pipe 7 is connected to the second heat dissipation surface 12 .

[0054] The electric control device 200 also includes a connector 3, which is disposed between two adjacent heat dissipation modules 1, and one end of the connector 3 is connected to the heat dissipation module 1 located on one side of the power module 2, and the other end of the connector 3 is connected to the heat dissipation module 1 located on the other side of the power module 2. The connection between the two adjacent heat dissipation modules 1 is achieved through the connector 3, and there is no need to improve the structure of the power module 2, and the power module 2 does not need to bear the force between the two heat dissipation modules 1, so the stability of the power module 2 will not be affected. In addition, the arrangement of the connector 3 can also enable the two adjacent heat dissipation modules 1 to be pressed against the power module 2 from both sides of the power module 2, so that the power module 2 can fit tightly with the heat dissipation module 1, further improving the heat dissipation effect.

[0055] The present disclosure does not limit the connection method between the connector 3 and the heat dissipation module 1. For example, the connector 3 can be connected to the heat dissipation module 1 by a detachable connection method such as fastener connection and clamping, or the connector 3 can also be connected to the heat dissipation module 1 in a non-detachable manner. In an exemplary embodiment provided by the present disclosure, the connector 3 is optionally welded to the heat dissipation module 1. The connector 3 and the heat dissipation module 1 are connected by welding, which can make the connector 3 and the heat dissipation module 1 have better structural strength, and the connector 3 and the heat dissipation module 1 are less likely to be loose, thereby ensuring that the heat dissipation module 1 can always fit tightly on the power module 2, and achieve stable and efficient cooling and heat dissipation of the power module 2.

[0056] In order to improve the connection effect between two adjacent heat dissipation modules 1 , the above-mentioned connecting member 3 can be formed into a tubular or plate-like structure, thereby increasing the contact area between the two heat dissipation modules 1 and improving the connection strength between the two heat dissipation modules 1 .

[0057] Furthermore, there may be multiple connectors 3 , and multiple connectors 3 are connected to two adjacent heat dissipation modules 1 around the edge of the power module 2 , further increasing the contact area with the two heat dissipation modules 1 and the structural strength.

[0058] In an exemplary embodiment provided in the present disclosure, the number of the connecting members 3 is two.

[0059] In an exemplary embodiment provided by the present disclosure, the power module 2 can be sintered and connected to the outer peripheral surface of the heat dissipation module 1. The power module 2 sintered and connected to the heat dissipation module 1 has higher mechanical strength, and the damage to the flatness of the outer peripheral surface of the heat dissipation module 1 and the outer peripheral surface of the power module 2 is small, so that the outer peripheral surface of the power module 2 and the outer peripheral surface of the heat dissipation module 1 (the first heat dissipation surface 11 or the second heat dissipation surface 12) have a larger contact area, that is, the outer peripheral surface of the power module 2 is guaranteed to be in full contact with the outer peripheral surface of the heat dissipation module 1 as much as possible.

[0060] Alternatively, in other embodiments provided in the present disclosure, the power module 2 may also be connected to the outer peripheral surface of the heat dissipation module 1 by non-detachable means such as welding or bonding, and the present disclosure does not limit this.

[0061] In other embodiments provided in the present disclosure, the power module 2 can also be connected to the heat dissipation module 1 in a detachable manner such as snap-on, fastener connection, etc. In this way, when the power module 2 or the heat dissipation module 1 fails, it is also easier to disassemble the power module 2 or the heat dissipation module 1 for repair or replacement.

[0062] Optionally, the thickness of the connector 3 is less than or equal to the thickness of the power module 2. Because the thickness of the connector 3 is less than or equal to the thickness of the power module 2, when the connector 3 is connected between two adjacent heat dissipation modules 1, the heat dissipation module 1 can be pressed against the power module 2, ensuring close contact between the heat dissipation module 1 and the power module 2, thereby increasing the contact area between the power module 2 and the heat dissipation module 1 and improving the heat dissipation effect on the power module 2.

[0063] Furthermore, if Figure 3 As shown, a plurality of power modules 2 are arranged between two adjacent heat dissipation modules 1, and the plurality of power modules 2 are arranged at intervals along the length direction or the width direction of the heat dissipation module 1, and one side of each power module 2 is arranged in abutment with one of the two adjacent heat dissipation modules 1, and the other side of each power module 2 is arranged in abutment with the other of the two adjacent heat dissipation modules 1. In other words, one heat dissipation module 1 can dissipate heat for a plurality of power modules 2 at the same time, and the heat dissipation module 1 has a smaller volume and a higher power density.

[0064] In an exemplary embodiment provided by the present disclosure, Figure 3 As shown, two power modules 2 are arranged between two adjacent heat dissipation modules 1 .

[0065] Moreover, the above-mentioned combination method (flat installation) can also reduce the dimensions of the power module 2 and the heat dissipation module 1 in the thickness direction, that is, under the condition of a certain heat dissipation efficiency, this arrangement method makes the thickness of the above-mentioned electronic control device 200 smaller to adapt to different installation requirements.

[0066] Alternatively, if Figure 3 As shown, the motor controller 100 may further include a connecting pipe 8, which is disposed between two adjacent power modules 2, and one end of the connecting pipe 8 is in communication with a cavity 10 in one of the two adjacent heat dissipation modules 1, and the other end of the connecting pipe 8 is in communication with a cavity 10 in the other of the two adjacent heat dissipation modules 1. By providing a connecting pipe 8 connecting two adjacent heat dissipation modules 1, the flow path of the cooling medium can be increased, and the cooling medium can enter or flow out of the adjacent heat dissipation module 1 through the connecting pipe 8, rather than being limited to flowing through the connecting pipe 4, thereby avoiding the problem of a large temperature difference between the cooling medium upstream and downstream of the heat dissipation module 1 due to the oversized size of the heat dissipation module 1.

[0067] In order to further improve the heat dissipation effect of the power module 2, as Figure 3 As shown, the end of the power module 2 arranged on both sides of the connecting tube 8 close to the connecting tube 4 can abut against the connecting tube 8. Since the cooling medium flows in the connecting tube 8, the heat exchange area between the power module 2 and the cooling medium is further increased, thereby improving the heat exchange effect on the power module 2.

[0068] Alternatively, if Figure 1 As shown, the box body 110 further includes a partition 114, which is disposed in the accommodating chamber 111 and divides the accommodating chamber 111 into a first chamber 1110 and a second chamber 1111. The motor controller 100 is disposed in the first chamber 1110, and the heat dissipation module 1 is welded to the partition 114 on one side close to the partition 114. On the one hand, the partition 114 can separate the motor controller 100 from other electronic components to prevent the heat generated by the motor controller 100 from interfering with other electronic components disposed in the second chamber 1111. On the other hand, the partition 114 can also be welded to the heat dissipation module 1 to improve the stability of the motor controller 100 disposed in the accommodating chamber 111.

[0069] In an exemplary embodiment provided in the present disclosure, the partition 114 and the welding plate 115 may be the same plate body, that is, the partition 114 can not only separate the space in the accommodating cavity 111 , but also enable welding of the electric control device 200 .

[0070] The second aspect of the present disclosure provides an electric assembly, including a motor, a gearbox and the above motor controller 100. The electric assembly has all the beneficial effects of the above motor controller 100, which will not be elaborated in the present disclosure.

[0071] The electric assembly may further include a capacitor 116 , which is disposed in the accommodating cavity 111 and connected to the motor controller 100 via a connecting sheet 117 .

[0072] The third aspect of the present disclosure provides a vehicle, comprising the motor controller 100 or the electric assembly as described above. The vehicle has all the beneficial effects of the motor controller 100 and the electric assembly as described above, which will not be elaborated in the present disclosure.

[0073] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0074] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0075] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A motor controller, characterized in that: It comprises a box body and an electric control device, wherein the box body has a receiving cavity and a welding plate inside, the welding plate is arranged in the receiving cavity and connected to the inner wall of the box body, and the electric control device is arranged in the receiving cavity and is welded to the welding plate; The electronic control device comprises: A heat dissipation module, wherein the heat dissipation module has a cavity inside, and the cavity contains a cooling medium; A liquid inlet pipe and a liquid outlet pipe, both of which are connected to the cavity, and a liquid inlet hole and a liquid outlet hole are formed on the box body, the liquid inlet pipe is inserted into the liquid inlet hole, and the liquid outlet pipe is inserted into the liquid outlet hole; The power module is provided with the heat dissipation modules on opposite sides of the power module, and the power module and the heat dissipation modules are arranged in close contact with each other.

2. The motor controller according to claim 1, characterized in that: The heat dissipation module is welded to the welding plate at one side thereof close to the welding plate.

3. The motor controller according to claim 1, characterized in that: The motor controller also includes at least one connecting pipe, which is connected to a side of the heat dissipation module close to the power module and communicates with the cavity. The connecting pipes of two adjacent power modules are arranged opposite to each other and can be connected when the two power modules are attached to both sides of the power modules.

4. The motor controller according to claim 3, characterized in that: The motor controller further comprises a sealing member, which seals and connects the two connecting pipes which are arranged opposite to each other.

5. The motor controller according to claim 1, characterized in that: The heat dissipation module comprises a first heat dissipation surface and a second heat dissipation surface which are arranged opposite to each other. The power modules are arranged on opposite sides of the heat dissipation module. The first heat dissipation surface is arranged in affixed relation to one of the power modules, and the second heat dissipation surface is arranged in affixed relation to the other power module.

6. The motor controller according to claim 1, characterized in that: The liquid inlet pipe and the liquid outlet pipe are arranged on the same side of the heat dissipation module; or, The liquid inlet pipe and the liquid outlet pipe are arranged on different sides of the heat dissipation module.

7. The motor controller according to claim 1, characterized in that: The power module is sintered and connected to the outer peripheral surface of the heat dissipation module.

8. The motor controller according to any one of claims 1 to 7, characterized in that: The electronic control device also includes a connector, which is arranged between two adjacent heat dissipation modules, and one end of the connector is connected to the heat dissipation module located on one side of the power module, and the other end of the connector is connected to the heat dissipation module located on the other side of the power module.

9. The motor controller according to claim 8, characterized in that: The connecting piece is connected to the heat dissipation module by welding.

10. The motor controller according to claim 8, characterized in that: The thickness of the connecting member is less than or equal to the thickness of the power module.

11. The motor controller according to any one of claims 1 to 7, characterized in that: A plurality of power modules are arranged between two adjacent heat dissipation modules, and the plurality of power modules are arranged at intervals along the length direction or the width direction of the heat dissipation module, and one side of each power module is fitted with one of the two adjacent heat dissipation modules, and the other side of each power module is fitted with the other of the two adjacent heat dissipation modules.

12. The motor controller according to claim 11, characterized in that: The motor controller also includes a connecting pipe, which is arranged between two adjacent power modules, and one end of the connecting pipe is connected to the cavity in one of the two adjacent heat dissipation modules, and the other end of the connecting pipe is connected to the cavity in the other of the two adjacent heat dissipation modules.

13. The motor controller according to any one of claims 1 to 7, characterized in that: The box body also includes a partition, which is arranged in the accommodating cavity and divides the accommodating cavity into a first chamber and a second chamber. The motor controller is arranged in the first chamber, and the heat dissipation module is welded to the partition on one side close to the partition.

14. An electric assembly, characterized in that: It comprises a motor, a transmission and a motor controller according to any one of claims 1-13.

15. A vehicle, characterized in that: It comprises the motor controller according to any one of claims 1 to 13 or the electric assembly according to claim 14.

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