Motor controller, electric driving device, electric driving system and electric equipment

Abstract

The utility model belongs to the technical field of electric driving, and provides a motor controller, an electric driving device, an electric driving system and electric equipment.The motor controller comprises a box body, a first power module and a first alternating current connecting piece, the box body is provided with a first containing cavity and a first leading-out hole, and the first containing cavity is communicated with the external environment of the box body through the first leading-out hole; the first power module is contained in the first containing cavity, the first alternating current electric connecting piece comprises a first input terminal and a first output terminal, the first input terminal is electrically connected with the first power module, and the first output terminal penetrates through the first leading-out hole from the first containing cavity to extend into the external environment of the box body and is used for being directly and electrically connected with the motor. According to the motor controller, the first output terminal is directly and electrically connected with the motor, the number of parts of the electric driving device is reduced, a current transmission path between the motor controller and the motor is shortened, stray inductance and lead inductance generated in the current transmission process are reduced, and the performance of the electric driving device is improved.

Description

Technical Field

[0001] This application belongs to the technical field of electric drive, and more specifically, relates to a motor controller, an electric drive device, an electric drive system, and an electric device. Background Art

[0002] With the increasing environmental pollution, new energy vehicles are becoming more and more popular among people. As the power device of new energy vehicles, the electric drive device is used to convert the electrical energy provided by the battery into mechanical energy to drive the new energy vehicle to travel. In the development process of new energy technology, how to improve the performance of the electric drive device is an urgent technical problem in new energy technology. Summary of the Utility Model

[0003] The purpose of the embodiments of this application is to provide a motor controller, an electric drive device, an electric drive system, and an electric device to solve the technical problem of poor performance of the electric drive device in related technologies.

[0004] To achieve the above purpose, the technical solution adopted in the embodiments of this application is: to provide a motor controller, including:

[0005] A box body, provided with a first cavity and a first lead-out hole, and the first cavity communicates with the external environment of the box body through the first lead-out hole;

[0006] A first power module, accommodated in the first cavity;

[0007] A first alternating current connecting member, including a first input terminal and a first output terminal, the first input terminal is electrically connected to the first power module, and the first output terminal extends from the first cavity through the first lead-out hole to the external environment of the box body and is used to directly electrically connect to the motor.

[0008] The motor controller provided by the embodiments of this application has at least the following beneficial effects: By extending the first output terminal of the first alternating current connecting member through the first lead-out hole to the external environment of the box body, the motor controller provided by the embodiments of this application can directly electrically connect the first output terminal to the motor without using components such as wire harnesses and adapters to electrically connect the first output terminal to the motor, effectively reducing the number of components of the electric drive device, and at the same time effectively shortening the current transmission path between the motor controller and the motor, thereby effectively reducing the stray inductance and lead inductance generated during the current transmission process, and effectively improving the performance of the electric drive device using the above motor controller.

[0009] In some embodiments of this application, the first lead-out hole is opened at the bottom of the box body.

[0010] By adopting the above technical solution, it is convenient to extend the first output terminal to the external environment of the box body and electrically connect it to the motor, further shortening the current transmission path between the motor controller and the motor, thereby further reducing the stray inductance and lead inductance generated during the current transmission process, and further improving the performance of the electric drive device adopting the above motor controller.

[0011] In some embodiments of the present application, the motor controller further includes a first seal, and the first output terminal is hermetically connected to the first lead-out hole through the first seal.

[0012] By adopting the above technical solution, the sealing performance of the motor controller is effectively improved.

[0013] In some embodiments of the present application, the box body is further provided with a second lead-out hole, and the first cavity is further communicated with the external environment of the box body through the second lead-out hole. The motor controller further includes a second power module and a second alternating current connector. The second power module is accommodated in the first cavity. The second alternating current connector includes a second input terminal and a second output terminal. The second input terminal is electrically connected to the second power module, and the second output terminal extends from the first cavity through the second lead-out hole to the external environment of the box body. The first output terminal is used to directly electrically connect to one motor, and the second output terminal is used to directly electrically connect to another motor.

[0014] By adopting the above technical solution, the above motor controller can control two motors simultaneously, and there is no need to use components such as wire harnesses and adapters to electrically connect the motor controller to the two motors, further reducing the number of components of the electric drive device, and at the same time effectively shortening the current transmission path between the motor controller and the two motors, thereby further reducing the stray inductance and lead inductance generated during the current transmission process, and further improving the performance of the electric drive device adopting the above motor controller.

[0015] In some embodiments of the present application, the first power module and the second power module are arranged side by side in a first direction, and the first direction is perpendicular to the height direction of the motor controller.

[0016] By adopting the above technical solution, the height dimension of the motor controller is effectively reduced, not only making the structure of the motor controller more compact, but also further shortening the current transmission path between the motor controller and the motor, thereby further reducing the stray inductance and lead inductance generated during the current transmission process, and further improving the performance of the electric drive device adopting the above motor controller.

[0017] In some embodiments of the present application, the first alternating current connector is arranged on the side of the first power module facing away from the second power module, and the second alternating current connector is arranged on the side of the second power module facing away from the first power module.

[0018] By adopting the above technical solution, the current transmission path between the motor controller and the motor is further shortened, thereby further reducing the stray inductance and lead inductance generated during the current transmission, and further improving the performance of the electric drive device adopting the above motor controller.

[0019] In some embodiments of the present application, the second lead-out hole is opened at the bottom of the box body.

[0020] By adopting the above technical solution, it is convenient to extend the second output terminal to the external environment of the box body and electrically connect the motor, further shortening the current transmission path between the motor controller and the motor, thereby further reducing the stray inductance and lead inductance generated during the current transmission, and further improving the performance of the electric drive device adopting the above motor controller.

[0021] In some embodiments of the present application, the motor controller further includes a second sealing member, and the second output terminal is sealingly connected to the second lead-out hole through the second sealing member.

[0022] By adopting the above technical solution, the sealing performance of the motor controller is effectively improved.

[0023] In some embodiments of the present application, the motor controller further includes a DC electrical connector disposed between the first power module and the second power module. The DC electrical connector includes a third output terminal and a fourth output terminal. The third output terminal is electrically connected to the first power module, and the fourth output terminal is electrically connected to the second power module.

[0024] By adopting the above technical solution, the first power module and the second power module can share a DC electrical connector, effectively reducing the number of components of the motor controller, making the structure of the motor controller more compact, and thus effectively reducing the volume of the motor controller.

[0025] In some embodiments of the present application, the box body is provided with a cooling flow channel. The cooling flow channel includes a main flow channel, a first branch flow channel and a second branch flow channel. The first branch flow channel and the second branch flow channel communicate with the main flow channel. The first power module is disposed on the first branch flow channel to cool the first power module, and the second power module is disposed on the second branch flow channel to cool the second power module.

[0026] By adopting the above technical solution, the cooling effect on the first power module and the second power module is effectively improved, the temperature difference between the first power module and the second power module is reduced, and thus the performance of the motor controller is effectively improved.

[0027] In some embodiments of the present application, the box body has a second cavity. The motor controller further includes a capacitor. The capacitor is accommodated in the second cavity and disposed on the main flow channel to cool the capacitor.

[0028] By adopting the above technical solution, the cooling effect on the capacitor is effectively improved, thereby further improving the performance of the motor controller.

[0029] In some embodiments of the present application, the capacitor includes a core body, and the core body is potted in the second cavity.

[0030] By adopting the above technical solution, the cooling effect on the capacitor is further improved, thereby further improving the performance of the motor controller.

[0031] In some embodiments of the present application, the flow area of the first branch flow channel is equal to the flow area of the second branch flow channel.

[0032] By adopting the above technical solution, the temperature difference between the first power module and the second power module is further reduced, thereby further improving the performance of the motor controller.

[0033] In some embodiments of the present application, the cooling flow channel is arranged at the bottom of the box body.

[0034] By adopting the above technical solution, it is convenient to arrange the cooling flow channel on the box body, effectively simplifying the structure of the box body.

[0035] The embodiment of the present application also provides an electric drive device, which includes a first motor and the motor controller described in any one of the above embodiments, and the first output terminal is directly electrically connected to the first motor.

[0036] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: Since the motor controller described in any one of the above embodiments is adopted in the electric drive device provided by the embodiment of the present application, the performance of the electric drive device is effectively improved.

[0037] The embodiment of the present application also provides an electric drive device, which includes a first motor, a second motor and the motor controller described in any one of the above embodiments, the first output terminal is directly electrically connected to the first motor, and the second output terminal is directly electrically connected to the second motor.

[0038] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: Since the motor controller described in any one of the above embodiments is adopted in the electric drive device provided by the embodiment of the present application, the performance of the electric drive device is effectively improved.

[0039] The embodiment of the present application also provides an electric drive system, which includes a battery and the electric drive device described in any one of the above embodiments, and the battery is electrically connected to the electric drive device.

[0040] The electric drive system provided by the embodiments of the present application has at least the following beneficial effects: Since the electric drive system provided by the embodiments of the present application adopts the electric drive device described in any one of the above embodiments, the performance of the electric drive system is effectively improved.

[0041] The embodiments of the present application also provide an electric device, including the above electric drive system.

[0042] The electric device provided by the embodiments of the present application has at least the following beneficial effects: Since the electric device provided by the embodiments of the present application adopts the electric drive system described in any one of the above embodiments, the performance of the electric device is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic structural diagram of a vehicle provided by the embodiments of the present application;

[0045] Figure 2 It is an exploded structural diagram of a battery provided by the embodiments of the present application;

[0046] Figure 3 It is a schematic structural diagram of an electric drive device provided by the embodiments of the present application;

[0047] Figure 4 For Figure 3 It is a schematic structural diagram of a motor controller in the electric drive device shown;

[0048] Figure 5 For Figure 4 It is an exploded structural diagram of the motor controller shown;

[0049] Figure 6 For Figure 5 It is a schematic structural diagram of a first alternating current connector in the motor controller shown;

[0050] Figure 7 For Figure 5 It is a schematic structural diagram of a second alternating current connector in the motor controller shown;

[0051] Figure 8 For Figure 4 It is a left view structural diagram of the motor controller shown;

[0052] Figure 9 For Figure 8Schematic cross-sectional structure diagram of the shown motor controller along the A-A line;

[0053] Figure 10 For Figure 4 Front view structure schematic diagram of the shown motor controller;

[0054] Figure 11 For Figure 10 Schematic cross-sectional structure diagram of the shown motor controller along the B-B line.

[0055] Among them, each reference numeral in the figure:

[0056] 1. Electric drive system;

[0057] 10. Electric drive device;

[0058] 11. Motor controller; 111. Box body; 1111. First cavity; 1112. First lead-out hole; 1113. Second lead-out hole; 1114. Cooling flow channel; 11141. Main flow channel; 11142. First branch flow channel; 11143. Second branch flow channel; 1115. Second cavity; 112. First power module; 113. First AC connection part; 1131. First input terminal; 1132. First output terminal; 1133. First insulator; 114. Second power module; 115. Second AC connection part; 1151. Second input terminal; 1152. Second output terminal; 1153. Second insulator; 116. DC connection part; 1161. Third output terminal; 1162. Fourth output terminal; 1163. Third input terminal; 117. Capacitor; 1171. Core body; 118. First seal; 119. Second seal;

[0059] 12. First motor;

[0060] 13. Second motor;

[0061] 20. Battery;

[0062] 21. Battery box; 211. First part; 212. Second part;

[0063] 22. Battery cell;

[0064] 2. Vehicle body. Specific embodiments

[0065] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0066] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0067] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0069] An electric drive device is a device for converting electrical energy into mechanical energy. The electric drive device generally includes a motor and a motor controller. The motor controller is used to convert direct current into alternating current and transmit the alternating current to the motor to drive the motor to operate. The motor controller can also be used to control the operation of the motor, such as controlling the rotational speed of the motor.

[0070] In the related art, the motor controller includes a housing, a power module, an AC connector, and a DC connector. The housing is used to accommodate functional components such as the power module, the AC connector, and the DC connector. The housing is provided with an AC terminal and a DC terminal. One end of the AC connector is electrically connected to the AC output terminal of the power module, and the other end of the AC connector is directly or indirectly electrically connected to the AC terminal. One end of the DC connector is electrically connected to the DC input terminal of the power module, and the other end of the DC connector is directly or indirectly electrically connected to the DC terminal. The motor controller is electrically connected to the motor through an AC wire harness. Specifically, one end of the AC wire harness is electrically connected to the AC terminal of the motor, and the other end of the AC wire harness is electrically connected to the AC terminal. During operation, direct current is input into the motor controller from the DC terminal, then input into the power module through the DC connector. The power module converts the direct current into alternating current, and the alternating current is transmitted to the motor through the AC connector, the AC terminal, and the AC wire harness in sequence.

[0071] However, in the related art, the electric drive device not only has a large number of components, but also has a long current transmission path between the motor controller and the motor, resulting in a large amount of stray inductance and lead inductance generated during the current transmission process, which is not conducive to improving the performance of the electric drive device.

[0072] In order to improve the performance of the electric drive device, the motor controller provided in the embodiment of the present application can directly electrically connect the first output terminal of the first AC connector to the motor by extending the first output terminal through the first lead-out hole to the external environment of the box body, without using components such as wire harnesses and adapters to electrically connect the first output terminal to the motor, effectively reducing the number of components of the electric drive device, and at the same time effectively shortening the current transmission path between the motor controller and the motor, thereby effectively reducing the stray inductance and lead inductance generated during the current transmission process, and effectively improving the performance of the electric drive device using the above-mentioned motor controller.

[0073] The technical solutions described in the embodiments of the present application are applicable to electric drive devices and electrical equipment using electric drive devices. Among them, the electrical equipment can be, but not limited to, vehicles, ships, spacecrafts, and electric toys, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc. Electric toys include fixed or mobile electric toys, for example, electric vehicle toys, electric ship toys, and electric airplane toys, etc. For the convenience of description, the following embodiments take a vehicle as an example of an electrical equipment in an embodiment of the present application for illustration.

[0074] For the convenience of description, the following embodiments take a vehicle as an example of an electrical equipment in an embodiment of the present application for illustration.

[0075] Please refer to Figure 1 , Figure 1Schematic structural diagram of a vehicle provided by an embodiment of the present application. The vehicle includes a vehicle body 2, a battery 20, and an electric drive device 10. The vehicle body 2 is the main support component of the vehicle. The vehicle body 2 has an engine compartment and a driver and passenger compartment. Among them, the engine compartment is used to accommodate the electric drive device 10, and the driver and passenger compartment is used to provide an operating space and a seating space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is arranged at the head of the vehicle body 2, that is, the engine compartment is a front engine compartment; when the vehicle is a rear-wheel drive vehicle, the engine compartment is arranged at the tail of the vehicle body 2, that is, the engine compartment is a rear engine compartment; when the vehicle is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment. The front engine compartment is arranged at the head of the vehicle body 2, and the rear engine compartment is arranged at the tail of the vehicle body 2. The number of electric drive devices 10 can be two, and the two electric drive devices 10 are respectively arranged in the front engine compartment and the rear engine compartment. The battery 20 and the electric drive device 10 together form the electric drive system 1 of the vehicle. The battery 20 can be arranged at the bottom, head or tail of the vehicle. The battery 20 can be used to supply power to the electric drive device 10 to drive the electric drive device 10 to operate. The electric drive device 10 is used to convert the electrical energy provided by the battery 20 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle to travel.

[0076] Please refer to Figure 2 , Figure 2 Explosion schematic diagram of the battery 20 provided by an embodiment of the present application. The battery 20 includes a battery box 21 and battery cells 22. The battery cells 22 are accommodated in the battery box 21. Among them, the battery box 21 is used to provide an accommodation space for the battery cells 22, and the battery box 21 can adopt various structures. In some embodiments, the battery box 21 can include a first part 211 and a second part 212. The first part 211 and the second part 212 are mutually covered, and the first part 211 and the second part 212 together define an accommodation space for accommodating the battery cells 22. The second part 212 can be a hollow structure with one end open, and the first part 211 can be a plate-like structure. The first part 211 is covered on the open side of the second part 212 so that the first part 211 and the second part 212 together define an accommodation space; the first part 211 and the second part 212 can also both be hollow structures with one side open, and the open side of the first part 211 is covered on the open side of the second part 212 so that the first part 211 and the second part 212 together define an accommodation space. Of course, the battery box 21 formed by the first part 211 and the second part 212 can be in various shapes, such as a cylinder, a cuboid, etc., which are not specifically limited herein.

[0077] In some embodiments, the battery box 21 can be used as a part of the chassis structure of the vehicle. For example, a part of the battery box 21 can become at least a part of the floor of the vehicle, or a part of the battery box 21 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0078] Of course, in some embodiments, the battery 20 may not include the battery box 21. Instead, a plurality of battery cells 22 are electrically connected, and after forming an integral body through necessary fixing structures, they are assembled into a vehicle.

[0079] In the battery 20, there may be a plurality of battery cells 22. The plurality of battery cells 22 may be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the plurality of battery cells 22. The plurality of battery cells 22 may be directly connected in series, in parallel, or in a series-parallel combination together, and then the integral body formed by the plurality of battery cells 22 is accommodated in the battery box 21. Of course, the battery 20 may also be that a plurality of battery cells 22 are first connected in series, in parallel, or in a series-parallel combination to form battery modules, and then the plurality of battery modules are connected in series, in parallel, or in a series-parallel combination to form an integral body and are accommodated in the battery box 21. The battery 20 may further include other functional components. For example, the battery 20 may further include a busbar for realizing the electrical connection among the plurality of battery cells 22.

[0080] Among them, each battery cell 22 may be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can activate the active material through charging after discharging, and a primary battery cell refers to a battery cell 22 that cannot activate the active material through charging after the electric energy is exhausted; the battery cell 22 may also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium-metal battery cell, a sodium-metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but is not limited thereto. The battery cell 22 may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 22 of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell. The multi-prismatic battery cell is, for example, a hexagonal-prismatic battery cell, etc. There is no particular limitation in the present application.

[0081] Please refer to Figure 3 , Figure 3Schematic diagram of the structure of the electric drive device 10 provided by the embodiments of the present application. The electric drive device 10 includes a first motor 12 and a motor controller 11. The first motor 12 is configured to convert electrical energy provided by the battery 20 into mechanical energy. The first motor 12 may be, but is not limited to, an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc. The electric drive device 10 may further include a second motor 13, and the second motor 13 is configured to convert electrical energy provided by the battery 20 into mechanical energy. The second motor 13 may be, but is not limited to, an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc. During the operation of the electric drive device 10, the rotational speeds of the first motor 12 and the second motor 13 may be the same, or the rotational speeds of the first motor 12 and the second motor 13 may also be different.

[0082] In some embodiments, the rotation axes of the first motor 12 and the second motor 13 are parallel to each other. The first motor 12 may be coaxially arranged with the second motor 13, that is, the central axes of the first motor 12 and the second motor 13 coincide. The "central axis" of the motor refers to the axial centerline of the rotation axis (or "rotor shaft") of the motor. As an example, the rotation axis of the first motor 12 is connected to one of the left front wheel and the right front wheel of the vehicle, and the rotation axis of the second motor 13 is connected to the other of the left front wheel and the right front wheel of the vehicle, or the rotation axis of the first motor 12 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the rotation axis of the second motor 13 is connected to the other of the left rear wheel and the right rear wheel of the vehicle.

[0083] Of course, in other embodiments, the first motor 12 may also be arranged non-coaxially with the second motor 13, that is, the central axis of the second motor 13 is spaced from the central axis of the first motor 12 in any direction perpendicular to the central axis of the first motor 12.

[0084] The motor controller 11 is used to convert the direct current output by the battery 20 into alternating current and deliver the alternating current to the first motor 12 and the second motor 13. The motor controller 11 can also be used to control the operation of the first motor 12 and the second motor 13. For example, the motor controller 11 is used to control the start / stop, speed, torque, etc. of the first motor 12 and the second motor 13. In other words, the first motor 12, the second motor 13, and the battery 20 are electrically connected to the motor controller 11. The direct current output by the battery 20 can be delivered to the motor controller 11 through the current transmission path between the battery 20 and the motor controller 11. After the motor controller 11 converts the direct current into alternating current, the alternating current can be delivered to the first motor 12 and the second motor 13 through the current transmission path between the motor controller 11 and the first motor 12 and the current transmission path between the motor controller 11 and the second motor 13 to drive the first motor 12 and the second motor 13 to operate. At the same time, the control signal of the motor controller 11 can be transmitted to the first motor 12 through the current transmission path between the motor controller 11 and the first motor 12, and can be transmitted to the second motor 13 through the current transmission path between the motor controller 11 and the second motor 13. The operation state signal of the first motor 12 can be transmitted to the motor controller 11 through the current transmission path between the motor controller 11 and the first motor 12, and the operation state signal of the second motor 13 can be transmitted to the motor controller 11 through the current transmission path between the motor controller 11 and the second motor 13, so as to realize the motor controller 11 controlling the operation of the first motor 12 and the second motor 13.

[0085] The electric drive device 10 may further include a speed change mechanism. The speed change mechanism is used to transfer the above mechanical energy to the vehicle wheels in a way that changes the speeds and torques of the first motor 12 and the second motor 13. For example, the speed change mechanism transfers the above mechanical energy to the vehicle wheels in a way that reduces the speeds of the first motor 12 and the second motor 13 and increases the torques of the first motor 12 and the second motor 13. Another example is that the speed change mechanism transfers the above mechanical energy to the vehicle wheels in a way that increases the speeds of the first motor 12 and the second motor 13 and reduces the torques of the first motor 12 and the second motor 13. The speed change mechanism can be, but is not limited to, a gear shaft speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, etc.

[0086] In order to illustrate the technical solutions provided in this application, the following will be described in detail with reference to specific drawings and embodiments.

[0087] In the first aspect, please refer to Figures 4 to 9, an embodiment of the present application provides a motor controller 11, including a box body 111, a first power module 112, and a first AC power connector 113. The box body 111 is provided with a first cavity 1111 and a first lead-out hole 1112. The first cavity 1111 communicates with the external environment of the box body 111 through the first lead-out hole 1112. The first power module 112 is accommodated in the first cavity 1111. The first AC power connector 113 includes a first input terminal 1131 and a first output terminal 1132. The first input terminal 1131 is electrically connected to the first power module 112, and the first output terminal 1132 extends from the first cavity 1111 through the first lead-out hole 1112 to the external environment of the box body 111 and is used to directly electrically connect to a motor.

[0088] The motor controller 11 has a height direction, a length direction, and a width direction. As an example, the height direction can be Figure 4 , Figure 5 , Figure 8 and Figure 9 the Z direction shown in the figure. As an example, the length direction can be Figure 4 , Figure 5 and Figure 9 the X direction shown in the figure. As an example, the width direction can be Figure 4 , Figure 5 and Figure 8 the Y direction shown in the figure. Since the box body 111 defines the shape of the motor controller 11, therefore, the height direction, length direction, and width direction of the motor controller 11 are the height direction, length direction, and width direction of the box body 111. It should be noted that the dimension of the motor controller 11 along the length direction and the dimension along the width direction can be equal or unequal.

[0089] The box body 111 is a component for providing the internal installation environment of the motor controller 11. An opening can be provided on the box body 111, and components such as the first power module 112 can be assembled into the internal installation environment of the motor controller 11 through the opening. The box body 111 can be an integrally formed member or an assembled member assembled from multiple parts. The material of the box body 111 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc. At least part of the space in the internal installation environment of the motor controller 11 constitutes the above-mentioned first cavity 1111, and the first cavity 1111 is used to accommodate components such as the first power module 112. The first lead-out hole 1112 penetrates through the wall of the box body 111 to communicate the first cavity 1111 and the external environment of the box body 111. The first lead-out hole 1112 can be opened on any wall of the box body 111. For example, the first lead-out hole 1112 is opened on the bottom wall of the box body 111, or the first lead-out hole 1112 is opened on the side wall of the box body 111.

[0090] In some embodiments, the motor controller 11 may further include a cover body that covers the opening side of the box body 111 to isolate the above internal installation environment from the external environment of the box body 111. The cover body may be integrally connected to the box body 111. For example, after the cover body covers the box body 111, the cover body and the box body 111 are welded into a whole. The cover body may also be detachably connected to the box body 111. For example, the cover body and the box body 111 are connected by fasteners such as bolts and screws. The material of the cover body may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0091] The first power module 112 is used to convert the direct current output by the battery 20 into an alternating current. The first power module 112 may be, but is not limited to, a silicon carbide power module, an insulated gate bipolar transistor power module (Insulated Gate Bipolar Transistor, IGBT), etc.

[0092] In some embodiments, the motor controller 11 may further include a main control module and a drive module. The main control module is the core control component of the motor controller 11 and is used to control the operation of the motor, such as controlling the start and stop, speed, torque, etc. of the motor. The drive module is electrically connected between the main control module and the first power module 112, and the drive module is used to convert the logic signal output by the main control module into the voltage signal and current signal required to drive the first power module 112. The main control module and the drive module may be integrated into one body or may be separately and independently provided as two electronic devices.

[0093] The first alternating current connecting member 113 is a component for electrically connecting the first power module 112 and the motor. Among them, the first input terminal 1131 of the first alternating current connecting member 113 is electrically connected to the alternating current output end of the first power module 112, and the first output terminal 1132 of the first alternating current connecting member 113 is electrically connected to the alternating current input end of the motor. The first alternating current connecting member 113 may be, but is not limited to, a copper busbar, a wire, etc.

[0094] The first output terminal 1132 is directly electrically connected to the motor, which means that there is no intermediate component between the first output terminal 1132 and the alternating current input end of the motor, but the first output terminal 1132 is in direct contact with and connected to the alternating current input end of the motor. At least a part of the first output terminal 1132 passes through the first lead-out hole 1112 and extends into the external environment of the box body 111 to be directly electrically connected to the alternating current input end of the motor.

[0095] In some embodiments, the first AC power connector 113 further includes a first body (not shown in the figure). The first body is connected between the first input terminal 1131 and the first output terminal 1132. A part of the first output terminal 1132 extends through the first lead-out hole 1112 to the external environment of the box body 111, while the other part of the first output terminal 1132, the first body, and the first input terminal 1131 are all accommodated in the first cavity 1111. As an example, the first AC power connector 113 may further include a first insulator 1133, and the first insulator 1133 covers the first body to insulate the first body from other components. Of course, in other embodiments, the first output terminal 1132 may also entirely extend through the first lead-out hole 1112 to the external environment of the box body 111, while the first body and the first input terminal 1131 are both accommodated in the first cavity 1111.

[0096] By extending the first output terminal 1132 of the first AC power connector 113 through the first lead-out hole 1112 to the external environment of the box body 111, the motor controller 11 provided by the embodiment of the present application can directly electrically connect the first output terminal 1132 to the motor without using components such as wire harnesses and adapters to electrically connect the first output terminal 1132 to the motor. This effectively reduces the number of components of the electric drive device 10 and simultaneously effectively shortens the current transmission path between the motor controller 11 and the motor, thereby effectively reducing the stray inductance and lead inductance generated during the current transmission process and effectively improving the performance of the electric drive device 10 using the above-mentioned motor controller 11.

[0097] In some embodiments of the present application, please refer to Figure 9 , the first lead-out hole 1112 is opened at the bottom of the box body 111.

[0098] The bottom of the box body 111 refers to the part of the box body 111 below the first power module 112 in the height direction of the motor controller 11. The first lead-out hole 1112 may penetrate the bottom of the box body 111 along the height direction of the motor controller 11 to communicate the first cavity 1111 and the external environment of the box body 111.

[0099] By adopting the above technical solution, it is convenient to extend the first output terminal 1132 to the external environment of the box body 111 and electrically connect the motor, further shortening the current transmission path between the motor controller 11 and the motor, thereby further reducing the stray inductance and lead inductance generated during the current transmission process and further improving the performance of the electric drive device 10 using the above-mentioned motor controller 11.

[0100] In some embodiments of the present application, please refer to Figure 9, the motor controller 11 further includes a first seal 118, and the first output terminal 1132 is sealingly connected to the first lead-out hole 1112 through the first seal 118.

[0101] The first seal 118 is a component for closing the gap between the first output terminal 1132 and the hole wall of the first lead-out hole 1112. The outer peripheral contour shape of the first seal 118 can be adapted to the shape of the first lead-out hole 1112. As an example, both the outer peripheral contour shape of the first seal 118 and the shape of the first lead-out hole 1112 are square. The first seal 118 can be made of a flexible material, and the flexible material can be, but not limited to, rubber, silica gel, etc.

[0102] In some embodiments, the first seal 118 covers the port of the first lead-out hole 1112. The first seal 118 is provided with a first through-hole, and the first output terminal 1132 passes through the first through-hole and the first lead-out hole 1112 to extend into the external environment of the housing 111.

[0103] In other embodiments, the first seal 118 abuts between the first output terminal 1132 and the hole wall of the first lead-out hole 1112, and the first seal 118 is disposed around the first output terminal 1132.

[0104] By adopting the above technical solution, the sealing performance of the motor controller 11 is effectively improved.

[0105] In some embodiments of the present application, please refer to Figures 4 to 9 , the housing 111 is further provided with a second lead-out hole 1113. The first cavity 1111 is also communicated with the external environment of the housing 111 through the second lead-out hole 1113. The motor controller 11 further includes a second power module 114 and a second AC connector 115. The second power module 114 is accommodated in the first cavity 1111. The second AC connector 115 includes a second input terminal 1151 and a second output terminal 1152. The second input terminal 1151 is electrically connected to the second power module 114. The second output terminal 1152 extends from the first cavity 1111 through the second lead-out hole 1113 to the external environment of the housing 111. The first output terminal 1132 is used to directly electrically connect to one motor, and the second output terminal 1152 is used to directly electrically connect to another motor.

[0106] The second lead-out hole 1113 penetrates through the wall of the housing 111 to communicate the first cavity 1111 and the external environment of the housing 111. The second lead-out hole 1113 can be opened on any wall of the housing 111. For example, the second lead-out hole 1113 is opened on the bottom wall of the housing 111. Another example is that the second lead-out hole 1113 is opened on the side wall of the housing 111.

[0107] The second power module 114 is configured to convert the direct current output by the battery 20 into an alternating current. The second power module 114 may be, but is not limited to, a silicon carbide power module, an IGBT (Insulated Gate Bipolar Transistor) power module, etc.

[0108] In some embodiments, the above-mentioned drive module is electrically connected between the main control module and the first power module 112, and between the main control module and the second power module 114. The drive module is configured to convert the logic signal output by the main control module into the voltage signal and current signal required to drive the first power module 112 and the second power module 114.

[0109] The second alternating current connector 115 is a component for electrically connecting the second power module 114 and the motor. Among them, the second input terminal 1151 of the second alternating current connector 115 is electrically connected to the alternating current output terminal of the second power module 114, and the second output terminal 1152 of the second alternating current connector 115 is electrically connected to the alternating current input terminal of the motor. The second alternating current connector 115 may be, but is not limited to, a copper bar, a wire, etc. The first output terminal 1132 is used to directly electrically connect one motor, and the second output terminal 1152 is used to directly electrically connect another motor, that is, the motor connected by the first alternating current connector 113 and the motor connected by the second alternating current connector 115 are two independent motors respectively. As an example, the first input terminal 1131 of the first alternating current connector 113 is electrically connected to the alternating current output terminal of the first power module 112, and the first output terminal 1132 of the first alternating current connector 113 is electrically connected to the alternating current input terminal of the first motor 12 to transmit the alternating current output by the first power module 112 to the first motor 12. The second input terminal 1151 of the second alternating current connector 115 is electrically connected to the alternating current output terminal of the second power module 114, and the second output terminal 1152 of the second alternating current connector 115 is electrically connected to the alternating current input terminal of the second motor 13 to transmit the alternating current output by the second power module 114 to the second motor 13.

[0110] The direct electrical connection between the second output terminal 1152 and the motor means that there is no intermediate component between the second output terminal 1152 and the AC input terminal of the motor. Instead, the second output terminal 1152 is in direct contact with and connected to the AC input terminal of the motor. At least a part of the second output terminal 1152 extends through the second lead-out hole 1113 into the external environment of the housing 111 to be directly electrically connected to the AC input terminal of the motor. In some embodiments, the second AC electrical connector 115 further includes a second body (not shown in the figure). The second body is connected between the second input terminal 1151 and the second output terminal 1152. A part of the second output terminal 1152 extends through the second lead-out hole 1113 into the external environment of the housing 111, while the other part of the second output terminal 1152, the second body, and the second input terminal 1151 are all accommodated in the first cavity 1111. As an example, the second AC electrical connector 115 may further include a second insulator 1153. The second insulator 1153 covers the first body to insulate the second body from other components. Of course, in other embodiments, the second output terminal 1152 may also extend entirely through the second lead-out hole 1113 into the external environment of the housing 111, while the second body and the second input terminal 1151 are both accommodated in the first cavity 1111.

[0111] By adopting the above technical solution, the motor controller 11 can control two motors simultaneously, and there is no need to use components such as wire harnesses and adapters to electrically connect the motor controller 11 to the two motors. Further, the number of components of the electric drive device 10 is reduced, and at the same time, the current transmission path between the motor controller 11 and the two motors is effectively shortened. As a result, the stray inductance and lead inductance generated during the current transmission are further reduced, and the performance of the electric drive device 10 using the above motor controller 11 is further improved.

[0112] In some embodiments of the present application, please refer to Figure 5 and Figure 9 , the first power module 112 and the second power module 114 are arranged side by side in a first direction, and the first direction is perpendicular to the height direction of the motor controller 11.

[0113] The first direction can be any direction perpendicular to the height direction of the motor controller 11. The first power module 112 and the second power module 114 are arranged side by side in the first direction, which means that the first power module 112 and the second power module 114 are at the same height position, and the projection of the first power module 112 along the height direction of the motor controller 11 does not coincide with the projection of the second power module 114 along the height direction of the motor controller 11. As an example, the first direction is the length direction of the motor controller 11, that is, the first power module 112 and the second power module 114 are arranged side by side along the length direction of the motor controller 11. As an example, the first direction is the width direction of the motor controller 11, that is, the first power module 112 and the second power module 114 are arranged side by side along the width direction of the motor controller 11.

[0114] By adopting the above technical solution, the height dimension of the motor controller 11 is effectively reduced, which not only makes the structure of the motor controller 11 more compact, but also further shortens the current transmission path between the motor controller 11 and the motor, thereby further reducing the stray inductance and lead inductance generated during the current transmission process, and further improving the performance of the electric drive device 10 adopting the above motor controller 11.

[0115] In some embodiments of the present application, please refer to Figure 5 and Figure 9 , the first AC connector 113 is arranged on the side of the first power module 112 facing away from the second power module 114, and the second AC connector 115 is arranged on the side of the second power module 114 facing away from the first power module 112.

[0116] In some embodiments, the first power module 112 and the second power module 114 are arranged side by side along the length direction of the motor controller 11. The first AC connector 113 is arranged on the side of the first power module 112 facing away from the second power module 114, and the second AC connector 115 is arranged on the side of the second power module 114 facing away from the first power module 112, that is, the first AC connector 113, the first power module 112, the second power module 114, and the second AC connector 115 are arranged in sequence along the length direction of the motor controller 11.

[0117] In other embodiments, the first power module 112 and the second power module 114 are arranged side by side along the width direction of the motor controller 11. The first AC connector 113 is arranged on the side of the first power module 112 facing away from the second power module 114, and the second AC connector 115 is arranged on the side of the second power module 114 facing away from the first power module 112, that is, the first AC connector 113, the first power module 112, the second power module 114, and the second AC connector 115 are arranged in sequence along the width direction of the motor controller 11.

[0118] By adopting the above technical solution, the current transmission path between the motor controller 11 and the motor is further shortened, thereby further reducing the stray inductance and lead inductance generated during the current transmission, and further improving the performance of the electric drive device 10 adopting the above motor controller 11.

[0119] In some embodiments of the present application, please refer to Figure 9 , the second lead-out hole 1113 is opened at the bottom of the box body 111.

[0120] The second lead-out hole 1113 can penetrate the bottom of the box body 111 along the height direction of the motor controller 11 to communicate the first cavity 1111 and the external environment of the box body 111.

[0121] In some embodiments, the first power module 112 and the second power module 114 are arranged side by side along the first direction. The first AC connector 113 is arranged on the side of the first power module 112 facing away from the second power module 114, and the second AC connector 115 is arranged on the side of the second power module 114 facing away from the first power module 112. The first lead-out hole 1112 is opened at the bottom of the box body 111 and is located on the side of the first power module 112 facing away from the second power module 114. The second lead-out hole 1113 is opened at the bottom of the box body 111 and is located on the side of the second power module 114 facing away from the first power module 112. The first input terminal 1131 extends along the first direction and is electrically connected to the AC output terminal of the first power module 112, and the first output terminal 1132 extends along the height direction of the motor controller 11 and is electrically connected to the AC input terminal of the first motor 12. The second input terminal 1151 extends along the first direction and is electrically connected to the AC output terminal of the second power module 114, and the second output terminal 1152 extends along the height direction of the motor controller 11 and is electrically connected to the AC input terminal of the second motor 13.

[0122] By adopting the above technical solution, it is convenient to extend the second output terminal 1152 to the external environment of the box body 111 and electrically connect it to the motor, further shortening the current transmission path between the motor controller 11 and the motor, thereby further reducing the stray inductance and lead inductance generated during the current transmission, and further improving the performance of the electric drive device 10 adopting the above motor controller 11.

[0123] In some embodiments of the present application, please refer to Figure 9 , the motor controller 11 further includes a second sealing member 119, and the second output terminal 1152 is hermetically connected to the second lead-out hole 1113 through the second sealing member 119.

[0124] The second seal 119 is a component for closing the gap between the second output terminal 1152 and the hole wall of the second lead-out hole 1113. The outer peripheral contour shape of the second seal 119 can be adapted to the shape of the second lead-out hole 1113. As an example, both the outer peripheral contour shape of the second seal 119 and the shape of the second lead-out hole 1113 are square. The second seal 119 can be made of a flexible material, and the flexible material can be, but is not limited to, rubber, silica gel, etc.

[0125] In some embodiments, the second seal 119 covers the port of the second lead-out hole 1113. The second seal 119 is provided with a second through-hole, and the second output terminal 1152 passes through the second through-hole and the second lead-out hole 1113 to extend to the external environment of the housing 111.

[0126] In other embodiments, the second seal 119 abuts between the second output terminal 1152 and the hole wall of the second lead-out hole 1113, and the second seal 119 is disposed around the second output terminal 1152.

[0127] By adopting the above technical solution, the sealing performance of the motor controller 11 is effectively improved.

[0128] In some embodiments of the present application, please refer to Figure 5 and Figure 9 , the motor controller 11 further includes a DC electrical connector 116 disposed between the first power module 112 and the second power module 114. The DC electrical connector 116 includes a third output terminal 1161 and a fourth output terminal 1162. The third output terminal 1161 is electrically connected to the first power module 112, and the fourth output terminal 1162 is electrically connected to the second power module 114.

[0129] The DC electrical connector 116 is used to electrically connect the first power module 112 and the second power module 114 to supply DC current to the first power module 112 and the second power module 114. Among them, the third output terminal 1161 of the DC electrical connector 116 is electrically connected to the DC input terminal of the first power module 112, and the fourth output terminal 1162 of the DC electrical connector 116 is electrically connected to the DC input terminal of the second power module 114. The DC electrical connector 116 can be, but is not limited to, a bus bar, a copper bar, a wire, etc. As an example, the DC electrical connector 116 is a stacked bus bar.

[0130] In some embodiments, the motor controller 11 further includes a capacitor 117, which is used to smooth the DC voltage input to the motor controller 11 so that the DC voltage fluctuation is kept within an allowable range. The capacitor 117 can be, but is not limited to, a film capacitor 117, an electrolytic capacitor 117, an electric double-layer capacitor 117, etc. The DC power connection member 116 further includes a third input terminal 1163, which is electrically connected to the capacitor 117. The DC current output from the capacitor 117 enters the DC power connection member 116 through the third input terminal 1163. Then, a part of the DC current is input into the first power module 112 through the third output terminal 1161, and another part of the DC current is input into the second power module 114 through the fourth output terminal 1162. The motor controller 11 may further include an electromagnetic compatibility (EMC) filter. The EMC filter is electrically connected to the capacitor 117. The DC current flows through the EMC filter, the capacitor 117, and the DC power connection member 116 in sequence and then enters the first power module 112 and the second power module 114. The EMC filter is used to reduce or eliminate the interference effects caused by the electromagnetic waves generated during the transmission of the DC current on the first power module 112, the second power module 114, and the capacitor 117. The EMC filter can be, but is not limited to, a ferrite tube, a ferrite magnetic ring, a magnetic ring choke coil, etc.

[0131] In some embodiments, the first power module 112 and the second power module 114 are arranged side by side along a first direction. The first AC power connection member 113 is disposed on a side of the first power module 112 facing away from the second power module 114, and the second AC power connection member 115 is disposed on a side of the second power module 114 facing away from the first power module 112. The third output terminal 1161 and the fourth output terminal 1162 are respectively disposed on opposite sides of the DC power connection member 116 along the first direction. The third output terminal 1161 extends along the first direction and is electrically connected to the DC input terminal of the first power module 112, and the fourth output terminal 1162 extends along the first direction and is electrically connected to the DC input terminal of the second power module 114.

[0132] As an example, the third output terminal 1161 and the fourth output terminal 1162 are respectively disposed on opposite sides of the DC power connection member 116 along the length direction of the motor controller 11. The third output terminal 1161 extends along the length direction of the motor controller 11 and is electrically connected to the DC input terminal of the first power module 112, and the fourth output terminal 1162 extends along the length direction of the motor controller 11 and is electrically connected to the DC input terminal of the second power module 114. The third input terminal 1163 is disposed on a side of the DC power connection member 116 facing the capacitor 117 along the width direction of the motor controller 11, and the third input terminal 1163 extends along the width direction of the motor controller 11 and is electrically connected to the capacitor 117.

[0133] As an example, the third output terminal 1161 and the fourth output terminal 1162 are respectively arranged on opposite sides of the DC power connection member 116 along the width direction of the motor controller 11. The third output terminal 1161 extends along the width direction of the motor controller 11 and is electrically connected to the DC input terminal of the first power module 112. The fourth output terminal 1162 extends along the width direction of the motor controller 11 and is electrically connected to the DC input terminal of the second power module 114. The third input terminal 1163 is arranged on one side of the DC power connection member 116 facing the capacitor 117 along the length direction of the motor controller 11. The third input terminal 1163 extends along the length direction of the motor controller 11 and is electrically connected to the capacitor 117.

[0134] By adopting the above technical solution, the first power module 112 and the second power module 114 can share a DC power connection member 116, effectively reducing the number of components of the motor controller 11 and making the structure of the motor controller 11 more compact, thereby effectively reducing the volume of the motor controller 11.

[0135] In some embodiments of the present application, please refer to Figure 5 , Figure 9 , Figure 10 and Figure 11 , the box body 111 is provided with a cooling flow channel 1114. The cooling flow channel 1114 includes a main flow channel 11141, a first branch flow channel 11142 and a second branch flow channel 11143. The first branch flow channel 11142 and the second branch flow channel 11143 communicate with the main flow channel 11141. The first power module 112 is arranged on the first branch flow channel 11142 to cool the first power module 112. The second power module 114 is arranged on the second branch flow channel 11143 to cool the second power module 114.

[0136] The cooling flow channel 1114 is used to provide a flow space for the cooling medium. During the flow of the cooling medium, the cooling medium absorbs the heat of the first power module 112 and the second power module 114 to cool the first power module 112 and the second power module 114. The first power module 112 being arranged on the first branch flow channel 11142 means that the first power module 112 is in contact with the outer wall of the cooling flow channel 1114, or the first power module 112 is in direct contact with the cooling medium; the second power module 114 being arranged on the second branch flow channel 11143 means that the second power module 114 can be in contact with the outer wall of the cooling flow channel 1114, or the second power module 114 is in direct contact with the cooling medium.

[0137] As an example, on one side of the first power module 112 facing the first branch flow channel 11142, there are a number of first heat conducting parts. The first heat conducting parts are inserted into the first branch flow channel 11142 and are in contact with the cooling medium, so that the heat of the first power module 112 is transferred to the cooling medium via the first heat conducting parts. Among them, the first heat conducting parts can be, but are not limited to, heat conducting fins, heat conducting pins, etc. On one side of the second power module 114 facing the second branch flow channel 11143, there are a number of second heat conducting parts. The second heat conducting parts are inserted into the second branch flow channel 11143 and are in contact with the cooling medium, so that the heat of the second power module 114 is transferred to the cooling medium via the second heat conducting parts. Among them, the second heat conducting parts can be, but are not limited to, heat conducting fins, heat conducting pins, etc.

[0138] In some embodiments, the housing 111 may be provided with a liquid inlet, and the liquid inlet is communicated with the main flow channel 11141. The cooling medium enters the main flow channel 11141 from the liquid inlet. After flowing through the main flow channel 11141, the cooling medium is divided into two parts. One part enters the first branch flow channel 11142 for cooling the first power module 112, and the other part enters the second branch flow channel 11143 for cooling the second power module 114. As an example, the motor controller 11 may further include a liquid inlet pipe. One end of the liquid inlet pipe is connected to the liquid inlet, and the other end of the liquid inlet pipe is used to connect to the liquid outlet end of the liquid supply device.

[0139] In some embodiments, the housing 111 may be provided with a first liquid outlet and a second liquid outlet. The first liquid outlet is communicated with the first branch flow channel 11142, and the cooling medium located in the first branch flow channel 11142 flows out of the housing 111 through the first liquid outlet. The second liquid outlet is communicated with the second branch flow channel 11143, and the cooling medium located in the second branch flow channel 11143 flows out of the housing 111 through the second liquid outlet. As an example, the first liquid outlet and the second liquid outlet are respectively arranged on opposite sides of the housing 111. As an example, the motor controller 11 further includes a first liquid outlet pipe and a second liquid outlet pipe. One end of the first liquid outlet pipe is connected to the first liquid outlet, one end of the second liquid outlet pipe is connected to the second liquid outlet, and the other ends of the first liquid outlet pipe and the second liquid outlet pipe are both connected to the return end of the liquid supply device.

[0140] Of course, in other embodiments, the housing 111 may also be provided with only one liquid outlet, and both the first branch flow channel 11142 and the second branch flow channel 11143 are communicated with this liquid outlet. The cooling medium located in the first branch flow channel 11142 and the cooling medium located in the second branch flow channel 11143 both flow out of the housing 111 through this liquid outlet.

[0141] The number of the first branch flow channels 11142 can be one or multiple. The number of the second branch flow channels 11143 can be one or multiple.

[0142] By adopting the above technical solution, the first branch flow channel 11142 and the second branch flow channel 11143 are arranged in parallel, and the temperature of the cooling medium entering the first branch flow channel 11142 is approximately equal to the temperature of the cooling medium entering the second branch flow channel 11143, effectively improving the cooling effect on the first power module 112 and the second power module 114, reducing the temperature difference between the first power module 112 and the second power module 114, and thus effectively improving the performance of the motor controller 11.

[0143] In some embodiments of the present application, please refer to Figure 5 and Figure 11 , the box body 111 has a second cavity 1115, and the above capacitor 117 is accommodated in the second cavity 1115 and arranged on the main flow channel 11141 to cool the capacitor 117.

[0144] A part of the internal installation environment of the motor controller 11 constitutes the above first cavity 1111, and another part of the internal installation environment of the motor controller 11 constitutes the above second cavity 1115.

[0145] In some embodiments, in the height direction of the motor controller 11, at least part of the main flow channel 11141 is located below the second cavity 1115, and the heat of the capacitor 117 can be transferred to the cooling medium in the main flow channel 11141 through the bottom of the second cavity 1115 to cool the capacitor 117.

[0146] By adopting the above technical solution, the cooling effect on the capacitor 117 is effectively improved, thereby further improving the performance of the motor controller 11.

[0147] In some embodiments of the present application, please refer to Figure 5 and Figure 11 , the capacitor 117 includes a core 1171, and the core 1171 is potted in the second cavity 1115.

[0148] The core 1171 is the core component of the capacitor 117, and the number of the cores 1171 can be one or more. The core 1171 can be fixed in the second cavity 1115 by using potting glue. Specifically, the core 1171 can be first placed in the second cavity 1115, and then the potting glue is poured into the second cavity 1115. After the potting glue solidifies, the core 1171 is fixed in the second cavity 1115.

[0149] In some embodiments, the potting glue can be a thermally conductive glue to improve the cooling effect on the capacitor 117.

[0150] In some embodiments, the motor controller 11 may further include an insulating member disposed between the core body 1171 and the wall of the second cavity 1115 to insulatively separate the core body 1171 from the housing 111. The insulating member may be, but is not limited to, insulating paper, insulating film, insulating board, etc.

[0151] By adopting the above technical solution, an additional housing does not need to be provided for the capacitor 117, but instead, the core body 1171 of the capacitor 117 is directly potted and fixed in the second cavity 1115, further improving the cooling effect on the capacitor 117, thereby further improving the performance of the motor controller 11.

[0152] In some embodiments of the present application, the flow area of the first branch flow channel 11142 is equal to the flow area of the second branch flow channel 11143.

[0153] The flow area of the first branch flow channel 11142 being equal to the flow area of the second branch flow channel 11143 means that: along the flow direction of the cooling medium, the flow rate of the cooling medium flowing through the unit area of the first branch flow channel 11142 is equal to the flow rate of the cooling medium flowing through the unit area of the second branch flow channel 11143.

[0154] In some embodiments, the number of the first branch flow channels 11142 and the number of the second branch flow channels 11143 are both multiple, and the number of the first branch flow channels 11142 is equal to the number of the second branch flow channels 11143, and the flow area of each first branch flow channel 11142 is equal to the flow area of each second branch flow channel 11143.

[0155] By adopting the above technical solution, the temperature difference between the first power module 112 and the second power module 114 is further reduced, thereby further improving the performance of the motor controller 11.

[0156] In some embodiments of the present application, please refer to Figure 5 , the cooling flow channel 1114 is disposed at the bottom of the housing 111.

[0157] By adopting the above technical solution, it is convenient to arrange the cooling flow channel 1114 on the housing 111, effectively simplifying the structure of the housing 111.

[0158] In a second aspect, please refer to Figure 3 , the present application embodiment provides an electric drive device 10, including a first motor 12 and the motor controller 11 described in any one of the above embodiments, and the first output terminal 1132 is directly electrically connected to the first motor 12.

[0159] Since the electric drive device 10 provided by the present application embodiment adopts the motor controller 11 described in any one of the above embodiments, the performance of the electric drive device 10 is effectively improved.

[0160] In a third aspect, please also refer to Figure 3 , an embodiment of the present application provides an electric drive device 10, including a first motor 12, a second motor 13, and the motor controller 11 described in any one of the above embodiments. The first output terminal 1132 is directly electrically connected to the first motor 12, and the second output terminal 1152 is directly electrically connected to the second motor 13.

[0161] Since the electric drive device 10 provided by the embodiment of the present application adopts the motor controller 11 described in any one of the above embodiments, the performance of the electric drive device 10 is effectively improved.

[0162] In a fourth aspect, please also refer to Figure 1 , an embodiment of the present application provides an electric drive system 1, including a battery 20 and the electric drive device 10 described in any one of the above embodiments. The battery 20 is electrically connected to the electric drive device 10.

[0163] Since the electric drive system 1 provided by the embodiment of the present application adopts the electric drive device 10 described in any one of the above embodiments, the performance of the electric drive system 1 is effectively improved.

[0164] In a fifth aspect, please also refer to Figure 1 , an embodiment of the present application provides an electric device, including the above electric drive system 1.

[0165] Since the electric device provided by the embodiment of the present application adopts the electric drive system 1 described in any one of the above embodiments, the performance of the electric device is effectively improved.

[0166] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor controller, characterized in that: include: The box body is provided with a first cavity and a first outlet hole, wherein the first cavity is connected to the external environment of the box body through the first outlet hole; A first power module is accommodated in the first cavity; The first AC connector includes a first input terminal and a first output terminal, wherein the first input terminal is electrically connected to the first power module, and the first output terminal extends from the first cavity through the first lead-out hole to the external environment of the box body and is used to directly electrically connect to the motor.

2. The motor controller according to claim 1, characterized in that: The first lead-out hole is opened at the bottom of the box body.

3. The motor controller according to claim 1, characterized in that: The motor controller further includes a first sealing member, and the first output terminal is sealed and connected to the first lead-out hole through the first sealing member.

4. The motor controller according to any one of claims 1 to 3, characterized in that: The box body is also provided with a second lead-out hole, and the first cavity is also connected to the external environment of the box body through the second lead-out hole. The motor controller also includes a second power module and a second AC connector. The second power module is accommodated in the first cavity. The second AC connector includes a second input terminal and a second output terminal. The second input terminal is electrically connected to the second power module, and the second output terminal extends from the first cavity through the second lead-out hole to the external environment of the box body. The first output terminal is used to directly electrically connect to one motor, and the second output terminal is used to directly electrically connect to another motor.

5. The motor controller according to claim 4, characterized in that: The first power module and the second power module are arranged side by side along a first direction, and the first direction is perpendicular to a height direction of the motor controller.

6. The motor controller according to claim 5, characterized in that: The first AC connector is disposed on a side of the first power module facing away from the second power module, and the second AC connector is disposed on a side of the second power module facing away from the first power module.

7. The motor controller according to claim 4, characterized in that: The second lead-out hole is opened at the bottom of the box body.

8. The motor controller according to claim 4, characterized in that: The motor controller further includes a second sealing member, and the second output terminal is sealed and connected to the second lead-out hole through the second sealing member.

9. The motor controller according to claim 4, characterized in that: The motor controller also includes a DC connector disposed between the first power module and the second power module, the DC connector including a third output terminal and a fourth output terminal, the third output terminal is electrically connected to the first power module, and the fourth output terminal is electrically connected to the second power module.

10. The motor controller according to claim 4, characterized in that: The box body is provided with a cooling channel, and the cooling channel includes a main channel, a first branch channel and a second branch channel. The first branch channel and the second branch channel are connected to the main channel. The first power module is arranged on the first branch channel to cool the first power module, and the second power module is arranged on the second branch channel to cool the second power module.

11. The motor controller according to claim 10, characterized in that: The box body has a second cavity, and the motor controller further includes a capacitor. The capacitor is accommodated in the second cavity and is arranged on the main flow channel to cool the capacitor.

12. The motor controller according to claim 11, characterized in that: The capacitor comprises a core body, and the core body is encapsulated in the second cavity.

13. The motor controller according to claim 10, characterized in that: The flow area of ​​the first branch flow channel is equal to the flow area of ​​the second branch flow channel.

14. The motor controller according to claim 10, characterized in that: The cooling channel is arranged at the bottom of the box body.

15. An electric drive device, characterized in that: The electric drive device includes a first motor and a motor controller as claimed in any one of claims 1 to 14, and the first output terminal is directly electrically connected to the first motor.

16. An electric drive device, characterized in that: The electric drive device includes a first motor, a second motor, and a motor controller as described in any one of claims 4 to 14, the first output terminal is directly electrically connected to the first motor, and the second output terminal is directly electrically connected to the second motor.

17. An electric drive system, characterized in that: The electric drive system comprises a battery and the electric drive device according to claim 15 or 16, and the battery is electrically connected to the electric drive device.

18. An electric device, characterized in that: The electric device comprises the electric drive system according to claim 17.

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