Electric motor controller, electric driving apparatus, electric driving system and electric device

Abstract

Provided in the present application are an electric motor controller (11), an electric driving apparatus (10), an electric driving system (1) and an electric device. The electric motor controller (11) comprises a first power module (111), a bus capacitor (112) and a direct-current connection assembly (113), wherein the direct-current connection assembly (113) comprises a conductive body (1131) and an absorption capacitor (1132), the conductive body (1131) being electrically connected between the first power module (111) and the bus capacitor (112), and the absorption capacitor (1132) being electrically connected to the conductive body (1131).

Description

Motor controllers, electric drive units, electric drive systems and electric equipment

[0001] Cross-references

[0002] This application incorporates Chinese Patent Application No. 202421606203.0, filed on July 8, 2024, entitled “Electric Motor Controller, Electric Drive Device, Electric Drive System and Electric Equipment”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application belongs to the field of electric drive technology, and more specifically, relates to a motor controller, electric drive device, electric drive system and electric equipment. Background Technology

[0004] With increasing environmental pollution, new energy vehicles are gaining popularity. The electric drive system, as the power unit of new energy vehicles, converts electrical energy from the battery into mechanical energy to propel the vehicle. Improving the performance of electric drive systems is a crucial technical challenge that urgently needs to be addressed in the development of new energy technologies. Summary of the Invention

[0005] The purpose of this application is to provide a motor controller, an electric drive device, an electric drive system, and an electric equipment to solve the technical problem of poor performance of electric drive devices in related technologies.

[0006] To achieve the above objectives, the technical solution adopted in this application embodiment is: to provide a motor controller, including:

[0007] First power module;

[0008] Bus capacitor;

[0009] A DC connection assembly includes a conductive body and an absorption capacitor. The conductive body is electrically connected between the first power module and the bus capacitor, and the absorption capacitor is electrically connected to the conductive body.

[0010] The motor controller provided in this application embodiment has at least the following beneficial effects: By electrically connecting the absorption capacitor to the conductive body, the motor controller provided in this application embodiment can absorb at least part of the high pulse voltage generated by the conductive body during the transmission of DC current in the conductive body, thereby reducing stray inductance and lead inductance on the conductive body, effectively improving the conductivity of the DC connection component, thereby effectively improving the performance of the motor controller, and further effectively improving the performance of the electric drive device.

[0011] In some embodiments of this application, the conductive body includes a first electrode and a second electrode with opposite polarities, and the absorption capacitor includes a first pin with the same polarity as the first electrode and a second pin with the same polarity as the second electrode. The first pin is electrically connected to the first electrode, and the second pin is electrically connected to the second electrode.

[0012] By adopting the above technical solution, it is easy to electrically connect the conductive body to the absorption capacitor.

[0013] In some embodiments of this application, the first electrode and the second electrode are separated and stacked.

[0014] By adopting the above technical solution, the structure of the DC connection component can be made more compact, effectively improving the internal space utilization of the motor controller, thereby effectively reducing the size of the motor controller and facilitating the optimization of the overall layout structure of the electric drive device.

[0015] In some embodiments of this application, the first electrode has a first connecting surface and a first pin is connected to the first connecting surface, the second electrode has a second connecting surface and a second pin is connected to the second connecting surface, and the first connecting surface and the second connecting surface are on the same plane.

[0016] By adopting the above technical solution, the flatness requirements of the absorption capacitor can be met, so that the force on the first pin and the second pin is more balanced, which effectively improves the stability of the connection between the absorption capacitor and the conductive body, thereby effectively improving the working reliability of the DC connection component.

[0017] In some embodiments of this application, the first electrode component is provided with a first boss and a first connecting surface is disposed on the first boss, and the second electrode component is provided with a second boss and a second connecting surface is disposed on the second boss.

[0018] By adopting the above technical solution, during the manufacturing process of the conductive body, the height of the first connecting surface and the second connecting surface can be adjusted by adjusting the height of the first boss and the second boss, so as to facilitate setting the first connecting surface and the second connecting surface on the same plane.

[0019] In some embodiments of this application, the DC connection assembly further includes a circuit board, a first conductive terminal and a second conductive terminal, an absorption capacitor fixed on the circuit board, the first conductive terminal being electrically connected between the first electrode and the first pin, and the second conductive terminal being electrically connected between the second electrode and the second pin.

[0020] By adopting the above technical solution, it is easy to electrically connect the conductive body and the absorption capacitor. Moreover, since the circuit board has good flatness, it can meet the flatness requirements of the absorption capacitor, so that the force on the first pin and the second pin is more balanced, effectively reducing the risk of the electrical connection path between the conductive body and the absorption capacitor being broken, thereby effectively improving the working reliability of the DC connection component.

[0021] In some embodiments of this application, the DC connection assembly further includes an insulating element that covers at least a portion of the conductive body.

[0022] By adopting the above technical solution, the conductive body can be insulated and separated from other conductive components, effectively reducing the risk of short circuit in the motor controller and thus effectively improving the working reliability of the motor controller.

[0023] In some embodiments of this application, the insulating member has a first cavity in which the absorbing capacitor is housed.

[0024] By adopting the above technical solution, not only is the position of the absorption capacitor effectively restricted, but it also protects the absorption capacitor and reduces the risk of collision between the absorption capacitor and other components, thereby effectively improving the working reliability of the DC connector.

[0025] In some embodiments of this application, the insulating element includes an insulating body and a stop, the insulating body covering at least a portion of the conductive body, and the stop being disposed on the insulating body and defining a first cavity.

[0026] By adopting the above technical solution, it is easy to form the first cavity on the insulating component.

[0027] In some embodiments of this application, the insulating member has a first through hole, through which the absorbing capacitor passes to be electrically connected to the conductive body.

[0028] By adopting the above technical solution, it is easy to electrically connect the conductive body and the absorption capacitor.

[0029] In some embodiments of this application, the port edge of the first via away from the conductive body has a chamfered structure.

[0030] By adopting the above technical solution, it is easy to assemble the absorption capacitor into the first via, which effectively improves the assembly efficiency of the DC connection component.

[0031] In some embodiments of this application, the absorption capacitor includes a core, and the DC connection assembly further includes thermally conductive adhesive, which covers at least a portion of the core and is connected to the conductive body.

[0032] By adopting the above technical solution, the heat generated by the core can be transferred to the conductive body through the thermally conductive adhesive, which effectively improves the heat dissipation efficiency of the core and thus effectively improves the working reliability of the DC connection component.

[0033] In some embodiments of this application, the absorption capacitor includes a core, and the DC connection assembly further includes a first thermally conductive element. The first thermally conductive element includes a first thermally conductive part and a second thermally conductive part that are thermally connected. The first thermally conductive part is thermally connected to the core, and the second thermally conductive part is thermally connected to the conductive body.

[0034] By adopting the above technical solution, at least part of the heat generated by the core can be transferred to the conductive body through the first heat-conducting element, which effectively improves the heat dissipation efficiency of the core and thus effectively improves the working reliability of the DC connection component.

[0035] In some embodiments of this application, the DC connection assembly further includes a first insulating thermal pad, which is disposed between the first thermally conductive part and the core to thermally connect and insulatingly separate the first thermally conductive part and the core.

[0036] By adopting the above technical solution, it is not only convenient to connect the first heat-conducting part to the core, but also to reduce the risk of short circuit between the first heat-conducting part and the core, thereby further improving the working reliability of the DC connection assembly.

[0037] In some embodiments of this application, the DC connection assembly further includes a second heat-conducting element, which includes a third heat-conducting part and a fourth heat-conducting part that are thermally connected to each other. The first heat-conducting part is thermally connected to one side of the core, the third heat-conducting part is thermally connected to the other side of the core, and the fourth heat-conducting part is thermally connected to the conductive body.

[0038] By adopting the above technical solution, not only can at least part of the heat generated by the core be transferred to the conductive body through the first heat-conducting element, but at least another part of the heat generated by the core can also be transferred to the conductive body through the second heat-conducting element, thereby further improving the heat dissipation efficiency of the core and thus further improving the working reliability of the DC connection component.

[0039] In some embodiments of this application, the DC connection assembly further includes a second insulating thermally conductive pad, which is disposed between the third thermally conductive part and the core to thermally connect and insulatingly separate the third thermally conductive part and the core.

[0040] By adopting the above technical solution, it is not only convenient to connect the third heat-conducting part to the core, but also to reduce the risk of short circuit between the third heat-conducting part and the core, thereby further improving the working reliability of the DC connection component.

[0041] In some embodiments of this application, the DC connection assembly further includes a third insulating thermally conductive pad disposed between the core and the conductive body to thermally connect and insulatingly separate the core and the conductive body.

[0042] By adopting the above technical solution, not only can at least part of the heat generated by the core be transferred to the conductive body through the third insulating thermal pad, further improving the heat dissipation efficiency of the core, but also the risk of short circuit between the conductive body and the core can be reduced, thereby further improving the working reliability of the DC connection component.

[0043] In some embodiments of this application, the conductive body includes three-phase first DC output terminals, each of which is electrically connected to at least one absorption capacitor.

[0044] By adopting the above technical solution, the DC current output by the three-phase first DC output terminal can be balanced, thereby further improving the performance of the motor controller.

[0045] In some embodiments of this application, the motor controller further includes a second power module, and the conductive body includes a first DC output terminal and a second DC output terminal. The first DC output terminal is electrically connected to the first power module, and the second DC output terminal is electrically connected to the second power module.

[0046] By adopting the above technical solution, the first power module and the second power module can share a DC power connection component, which effectively reduces the number of components in the motor controller, makes the structure of the motor controller more compact, and thus effectively reduces the size of the motor controller.

[0047] In some embodiments of this application, the conductive body includes a three-phase first DC output terminal and a three-phase second DC output terminal, each of the first DC output terminals being electrically connected to at least one absorption capacitor, and each of the second DC output terminals being electrically connected to at least another absorption capacitor.

[0048] By adopting the above technical solution, the DC current output by the three-phase first DC output terminal and the DC current output by the three-phase second DC output terminal can be balanced, thereby further improving the performance of the motor controller.

[0049] In some embodiments of this application, the first power module and the second power module are arranged side by side along a first direction, and a DC connection component is disposed between the first power module and the second power module. The first direction is perpendicular to the height direction of the motor controller.

[0050] By adopting the above technical solution, the height of the motor controller is effectively reduced, making the structure of the motor controller more compact and facilitating the optimization of the overall layout structure of the electric drive device.

[0051] This application also provides an electric drive device, including a first motor and a motor controller as described in any of the above embodiments, wherein a first power module is electrically connected to the first motor.

[0052] The electric drive device provided in this application embodiment has at least the following beneficial effects: the electric drive device provided in this application embodiment effectively improves the performance of the electric drive device by using the motor controller described in any of the above embodiments.

[0053] This application also provides an electric drive device, including a first motor, a second motor, and a motor controller as described in any of the above embodiments, wherein a first power module is electrically connected to the first motor, and a second power module is electrically connected to the second motor.

[0054] The electric drive device provided in this application embodiment has at least the following beneficial effects: the electric drive device provided in this application embodiment effectively improves the performance of the electric drive device by using the motor controller described in any of the above embodiments.

[0055] This application also provides an electric drive system, including a battery and an electric drive device as described in any of the above embodiments, wherein the battery is electrically connected to the electric drive device.

[0056] The electric drive system provided in this application embodiment has at least the following beneficial effects: the electric drive system provided in this application embodiment effectively improves the performance of the electric drive system by adopting the electric drive device described in any of the above embodiments.

[0057] This application also provides an electric device, including the above-described electric drive system.

[0058] The electric device provided in this application embodiment has at least the following beneficial effects: the electric device provided in this application embodiment effectively improves the performance of the electric device by adopting the electric drive system described in any of the above embodiments. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 is a structural schematic diagram of the vehicle provided in an embodiment of this application;

[0061] Figure 2 is a schematic diagram of the exploded structure of the battery provided in an embodiment of this application;

[0062] Figure 3 is a schematic diagram of the structure of the electric drive device provided in an embodiment of this application;

[0063] Figure 4 is a schematic diagram of the structure of the motor controller provided in an embodiment of this application;

[0064] Figure 5 is an exploded structural diagram of the motor controller shown in Figure 4;

[0065] Figure 6 is a schematic diagram of the left-side structure of the motor controller shown in Figure 4;

[0066] Figure 7 is a cross-sectional view of the motor controller shown in Figure 6 along line AA.

[0067] Figure 8 is a schematic diagram of the structure of a DC connection assembly provided in an embodiment of this application;

[0068] Figure 9 is a schematic diagram of the DC connection assembly shown in Figure 8 after removing the insulating parts and thermally conductive adhesive.

[0069] Figure 10 is a schematic diagram of the insulating component in the DC connection assembly shown in Figure 8;

[0070] Figure 11 is an enlarged structural diagram of point B of the insulating component shown in Figure 10;

[0071] Figure 12 is a schematic diagram of the left-side structure of the DC connection assembly shown in Figure 8;

[0072] Figure 13 is a cross-sectional view of the DC connection assembly shown in Figure 12 along the CC line.

[0073] Figure 14 is a schematic diagram of the structure of a DC connection assembly provided in another embodiment of this application;

[0074] Figure 15 is a schematic diagram of the structure of the first heat-conducting element in the DC connection assembly shown in Figure 14;

[0075] Figure 16 is a schematic diagram of the structure of the second heat-conducting element in the DC connection assembly shown in Figure 14;

[0076] Figure 17 is a schematic diagram of the left-side structure of the DC connection assembly shown in Figure 14;

[0077] Figure 18 is a cross-sectional view of the DC connection assembly shown in Figure 17 along the DD line.

[0078] Figure 19 is a schematic diagram of the structure of a DC connection assembly provided in another embodiment of this application;

[0079] Figure 20 is a schematic diagram of the structure of a DC connection component provided in another embodiment of this application.

[0080] In the figure, the following labels are used: 1. Electric drive system; 10. Electric drive device; 11. Motor controller; 111. First power module; 1111. Second DC input terminal; 112. Bus capacitor; 1121. Third DC output terminal; 113. DC connection assembly; 1131. Conductive body; 11311. First electrode; 11312. Second electrode; 11313. First DC output terminal; 11314. Second DC output terminal; 11315. First connecting surface; 11316. Second connecting surface; 11317. First boss; 11318. Second boss; 11319. First DC input terminal; 1132. Absorption capacitor; 11321. Core; 11322. First pin; 11323. Second pin; 1133. Insulating component; 11331. Insulating body; 11332. Edge; 11333. First cavity; 11334. First via; 11335. Chamfered structure; 1134. Thermally conductive adhesive; 113 5. First heat-conducting component; 11351. First heat-conducting part; 11352. Second heat-conducting part; 11353. First connecting part; 1136a. First insulating heat-conducting pad; 1136b. Second insulating heat-conducting pad; 1136c. Third insulating heat-conducting pad; 1137. Second heat-conducting component; 11371. Third heat-conducting part; 11372. Fourth heat-conducting part; 11373. Second connecting part; 1138. Circuit board; 1139a. First conductive terminal; 1139b. Second conductive terminal; 114. Second power module; 1141. Third DC input terminal; 115. Busbar electrical connector; 116. First AC connector; 117. Second AC connector; 118. Housing; 1181. Second cavity; 1182. Third cavity; 119. Control module; 12. First motor; 13. Second motor; 20. Battery; 21. Battery box; 211. First part; 212. Second part; 22. Battery cell; 2. Vehicle body. Detailed Implementation

[0081] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0082] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0083] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0085] An electric drive is a device used to convert electrical energy into mechanical energy. An electric drive typically includes a motor and a motor controller. The motor controller converts direct current into alternating current and transmits the alternating current to the motor to drive it. The motor controller can also be used to control the motor's operation, such as controlling its speed.

[0086] In related technologies, a motor controller includes a power module, a bus capacitor, and a DC connection assembly. The bus capacitor is electrically connected to an external wiring harness via a bus connector. DC current is transmitted to the bus capacitor through the external wiring harness and the bus connector. The bus capacitor can absorb high pulse voltages generated by the bus connector and the external wiring harness. One end of the DC connection assembly is electrically connected to the DC input terminal of the power module, and the other end is electrically connected to the DC output terminal of the bus capacitor to transmit the DC current to the power module. The power module is used to convert the DC current into AC current.

[0087] However, DC connection components also generate high pulse voltages during the transmission of DC current, which increases stray inductance and lead inductance on the DC connection components, reduces conductivity, and consequently reduces the performance of the motor controller, which is not conducive to improving the performance of the electric drive device.

[0088] To improve the performance of the electric drive device, the motor controller provided in this application embodiment connects an absorption capacitor to a conductive body. During the transmission of DC current in the conductive body, the absorption capacitor can absorb at least part of the high pulse voltage generated by the conductive body, thereby reducing stray inductance and lead inductance on the conductive body, effectively improving the conductivity of the DC connection component, thus effectively improving the performance of the motor controller, and further effectively improving the performance of the electric drive device.

[0089] The technical solutions described in this application are applicable to electric drive devices and electric equipment using electric drive devices. Electric equipment can be, but is not limited to, vehicles, ships, spacecraft, and electric toys, etc. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc.

[0090] For ease of explanation, the following embodiments use a vehicle as an example of an electric device according to an embodiment of this application.

[0091] Please refer to Figure 1, which is a structural schematic diagram of the vehicle provided in this embodiment. The vehicle includes a body 2, a battery 20, and an electric drive unit 10. The body 2 is the main supporting component of the vehicle, and has an engine compartment and a passenger compartment. The engine compartment is used to house the electric drive unit 10, and the passenger compartment provides operating and seating space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is located at the front of the body 2, i.e., the engine compartment is the front engine compartment; when the vehicle is a rear-wheel drive vehicle, the engine compartment is located at the rear of the body 2, i.e., the engine compartment is the 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, with the front engine compartment located at the front of the body 2 and the rear engine compartment located at the rear of the body 2. There can be two electric drive units 10, with the two electric drive units 10 located in the front engine compartment and the rear engine compartment, respectively. The battery 20 and the electric drive unit 10 together constitute the electric drive system 1 of the vehicle. The battery 20 can be located at the bottom, front, or rear of the vehicle. The battery 20 can supply power to the electric drive unit 10 to drive the electric drive unit 10. The electric drive unit 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.

[0092] Please refer to Figure 2, which is an exploded view of the battery 20 provided in an embodiment of this application. The battery 20 includes a battery case 21 and a battery cell 22, with the battery cell 22 housed within the battery case 21. The battery case 21 provides a space for the battery cell 22 and can have various structures. In some embodiments, the battery case 21 may include a first portion 211 and a second portion 212, which overlap each other, jointly defining a space for accommodating the battery cell 22. The second portion 212 may be a hollow structure with one open end, and the first portion 211 may be a plate-like structure, covering the open side of the second portion 212 so that the first portion 211 and the second portion 212 jointly define the space. Alternatively, the first portion 211 and the second portion 212 may both be hollow structures with one open side, with the open side of the first portion 211 covering the open side of the second portion 212 so that the first portion 211 and the second portion 212 jointly define the space. Of course, the battery box 21 formed by the first part 211 and the second part 212 can be of various shapes, such as cylinder, cuboid, etc., and no specific limitation is made here.

[0093] In some embodiments, the battery box 21 may be part of the vehicle's chassis structure. For example, a portion of the battery box 21 may be at least a portion of the vehicle's floor, or a portion of the battery box 21 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0094] Of course, in some embodiments, the battery 20 may not include the battery box 21, but rather multiple battery cells 22 are electrically connected and assembled into the vehicle after being formed into a whole by necessary fixing structures.

[0095] In battery 20, there can be multiple battery cells 22, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 22 are connected in both series and parallel configurations. Multiple battery cells 22 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 22 is housed within battery box 21. Alternatively, battery 20 can also consist of multiple battery cells 22 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules connected in series, parallel, or in a mixed manner to form a whole, which is then housed within battery box 21. Battery 20 may also include other functional components; for example, it may include a busbar for electrical connection between the multiple battery cells 22.

[0096] Each battery cell 22 can be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can be recharged to activate its active materials and continue to be used after being discharged. A primary battery cell refers to a battery cell 22 that cannot be recharged to activate its active materials and continue to be used after its electrical energy is depleted. The battery cell 22 can 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 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc. This application does not have any particular limitations.

[0097] Please refer to Figure 3, which is a schematic diagram of the structure of the electric drive device 10 provided in an embodiment of this application. The electric drive device 10 includes a first motor 12 and a motor controller 11. The first motor 12 is used to convert the electrical energy provided by the battery 20 into mechanical energy. The first motor 12 can 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 also include a second motor 13, which is used to convert the electrical energy provided by the battery 20 into mechanical energy. The second motor 13 can 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 speed of the first motor 12 and the rotational speed of the second motor 13 can be the same, or the rotational speeds of the first motor 12 and the second motor 13 can be different.

[0098] In some embodiments, the shafts of the first motor 12 and the second motor 13 are parallel, and the first motor 12 may be coaxially arranged with the second motor 13, that is, the central axis of the first motor 12 and the central axis of the second motor 13 coincide. The "central axis" of the motor refers to the axial center line of the motor's shaft (or "rotor shaft"). As an example, the shaft of the first motor 12 is connected to one of the left front wheel and the right front wheel of the vehicle, and the shaft 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 shaft of the first motor 12 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the shaft of the second motor 13 is connected to the other of the left rear wheel and the right rear wheel of the vehicle.

[0099] Of course, in other embodiments, the first motor 12 may also be coaxial with the second motor 13, that is, the central axis of the second motor 13 may be spaced apart from the central axis of the first motor 12 in any direction perpendicular to the central axis of the first motor 12.

[0100] The motor controller 11 is used to convert the direct current output by the battery 20 into alternating current and transmit 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, 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 transmitted 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 transmitted to the first motor 12 and the second motor 13 through the current transmission paths between the motor controller 11 and the first motor 12 and between the motor controller 11 and the second motor 13, so as to drive the first motor 12 and the second motor 13 to operate. Meanwhile, 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 also be transmitted to the second motor 13 through the current transmission path between the motor controller 11 and the second motor 13. The operating status 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 operating status 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 that the motor controller 11 controls the operation of the first motor 12 and the second motor 13.

[0101] The electric drive unit 10 may further include a transmission mechanism for transmitting the mechanical energy to the vehicle wheels by changing the speed and torque of the first motor 12 and the second motor 13. For example, the transmission mechanism transmits the mechanical energy to the vehicle wheels by decreasing the speed of the first motor 12 and the speed of the second motor 13 while increasing the torque of the first motor 12 and the second motor 13. Alternatively, the transmission mechanism transmits the mechanical energy to the vehicle wheels by increasing the speed of the first motor 12 and the speed of the second motor 13 while decreasing the torque of the first motor 12 and the second motor 13. The transmission mechanism may be, but is not limited to, a gear transmission mechanism, a worm gear transmission mechanism, a planetary gear transmission mechanism, a continuously variable transmission mechanism, etc.

[0102] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0103] Firstly, please refer to Figures 4 to 9 together. This application provides a motor controller 11, which includes a first power module 111, a bus capacitor 112, and a DC connection component 113. The DC connection component 113 includes a conductive body 1131 and an absorption capacitor 1132. The conductive body 1131 is electrically connected between the first power module 111 and the bus capacitor 112, and the absorption capacitor 1132 is electrically connected to the conductive body 1131.

[0104] The first power module 111 is used to convert the DC current output by the battery 20 into AC current. The first power module 111 can be, but is not limited to, a silicon carbide power module, an insulated gate bipolar transistor (IGBT) power module, etc.

[0105] In some embodiments, the motor controller 11 may further include a control module 119, which includes a main control unit and a drive unit. The main control unit is the core control device of the motor controller 11, used to control the operation of the motor, such as controlling the motor's start / stop, speed, and torque. The drive unit is electrically connected between the main control unit and the first power module 111, and is used to convert the logic signals output by the main control unit into voltage and current signals required to drive the first power module 111. The main control unit and the drive unit can be integrated into a single unit or configured as two independent electronic modules.

[0106] In some embodiments, the motor controller 11 may further include a first AC connector 116, which is a component for electrically connecting the first power module 111 and the motor. The first AC connector 116 may be, but is not limited to, a copper busbar, wire, etc.

[0107] In some embodiments, the motor controller 11 may further include a bus electrical connector 115, which is electrically connected between the bus capacitor 112 and an external power transmission component (such as a wiring harness). The DC current provided by the battery 20 is transmitted to the bus electrical connector 115 through the external power transmission component to transmit DC current to the motor controller 11. The bus electrical connector 115 may be, but is not limited to, a copper busbar, a wire, etc.

[0108] The bus capacitor 112 is used to absorb the high pulse voltage generated by the bus electrical connector 115 and external power transmission components during the transmission of DC current. The bus capacitor 112 can be, but is not limited to, a film capacitor, an electrolytic capacitor, or a double-layer capacitor.

[0109] The DC connection assembly 113 is used to electrically connect the first power module 111 and the bus capacitor 112 to provide DC current to the first power module 111. The DC connection assembly 113 can be, but is not limited to, a busbar, copper busbar, or wire. The conductive body 1131 is the main conductive part of the DC connection assembly 113, used to transfer DC current from the bus capacitor 112 to the first power module 111. The absorption capacitor 1132 is electrically connected to the conductive body 1131, and is used to absorb the high pulse voltage generated by the conductive body 1131 during DC current transmission. The absorption capacitor 1132 can be, but is not limited to, a film capacitor, an electrolytic capacitor, or an electric double-layer capacitor. The number of absorption capacitors 1132 can be one or more, depending on the specific application requirements.

[0110] In some embodiments, the conductive body 1131 may include a first DC output terminal 11313 and a first DC input terminal 11319, the first power module 111 may include a second DC input terminal 1111, and the bus capacitor 112 may include a third DC output terminal 1121. The first DC input terminal 11319 is electrically connected to the third DC output terminal 1121, and the first DC output terminal 11313 is electrically connected to the second DC input terminal 1111. DC current is transmitted from the third DC output terminal 1121 through the first DC input terminal 11319 to the conductive body 1131, and then from the first DC output terminal 11313 through the second DC input terminal 1111 to the first power module 111.

[0111] In some embodiments, the motor controller 11 may further include an electromagnetic compatibility (EMC) filter, which may be disposed on the bus electrical connector 115. The EMC filter is used to reduce or eliminate electromagnetic waves generated during DC current transmission, thereby reducing interference to the first power module 111 and the bus capacitor 112. The EMC filter may be, but is not limited to, ferrite tubes, ferrite magnetic rings, magnetic ring chokes, etc.

[0112] The motor controller 11 provided in this application embodiment connects the absorption capacitor 1132 to the conductive body 1131 electrically. During the transmission of DC current in the conductive body 1131, the absorption capacitor 1132 can absorb at least part of the high pulse voltage generated by the conductive body 1131, thereby reducing stray inductance and lead inductance on the conductive body 1131, effectively improving the conductivity of the DC connection component 113, thereby effectively improving the performance of the motor controller 11, and further effectively improving the performance of the electric drive device 10.

[0113] In some embodiments of this application, referring to Figures 4 to 7, the motor controller 11 also includes a housing 118, which provides an internal mounting environment for the motor controller 11. An opening may be provided on the housing 118, through which components such as the first power module 111, bus capacitor 112, and DC connection assembly 113 can be assembled into the internal mounting environment of the motor controller 11. The housing 118 can be a single-piece component or an assembled component composed of multiple parts. The material of the housing 118 can be, but is not limited to, copper, iron, aluminum, stainless steel, and aluminum alloy.

[0114] In some embodiments, at least a portion of the space within the internal installation environment of the motor controller 11 constitutes a second cavity 1181, which is used to accommodate components such as the first power module 111 and the DC connection assembly 113. At least another portion of the space within the internal installation environment of the motor controller 11 constitutes a third cavity 1182, which is used to accommodate components such as the bus capacitor 112.

[0115] In some embodiments, the motor controller 11 may further include a cover, which is disposed on the opening side of the housing 118 to isolate the internal installation environment from the external environment of the housing 118. The cover may be integrally connected to the housing 118, for example, by welding the cover to the housing 118 after it is disposed on the housing 118. The cover may also be detachably connected to the housing 118, for example, by fasteners such as bolts or screws. The material of the cover may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0116] In some embodiments of this application, please refer to Figures 9, 12 and 13 together. The conductive body 1131 includes a first electrode 11311 and a second electrode 11312 with opposite polarities. The absorption capacitor 1132 includes a first pin 11322 with the same polarity as the first electrode 11311 and a second pin 11323 with the same polarity as the second electrode 11312. The first pin 11322 is electrically connected to the first electrode 11311, and the second pin 11323 is electrically connected to the second electrode 11312.

[0117] The first electrode 11311 and the second electrode 11312 constitute the conductive body 1131. The opposite polarity of the first electrode 11311 and the opposite polarity of the second electrode 11312 means that one of the first electrode 11311 and the second electrode 11312 is a positive electrode, and the other is a negative electrode. For example, if the first electrode 11311 is a positive electrode and the second electrode 11312 is a negative electrode, the current input terminals of the first electrode 11311 and the second electrode 11312 together constitute the aforementioned first DC input terminal 11319, and the current output terminals of the first electrode 11311 and the second electrode 11312 together constitute the aforementioned first DC output terminal 11313.

[0118] The first pin 11322 and the second pin 11323 are two portions of the absorption capacitor 1132 used for electrical connection to the conductive body 1131. The polarity of the first pin 11322 is the same as the polarity of the first electrode 11311, and the polarity of the second pin 11323 is the same as the polarity of the second electrode 11312. For example, the first electrode 11311 is the positive electrode, the first pin 11322 is the positive pin, the second electrode 11312 is the negative electrode, and the second pin 11323 is the negative pin. The first pin 11322 can be directly connected to the first electrode 11311, or it can be electrically connected to the first electrode 11311 through other electrical connection components. Similarly, the second pin 11323 can be directly connected to the second electrode 11312, or it can be electrically connected to the second electrode 11312 through other electrical connection components.

[0119] By adopting the above technical solution, it is easy to electrically connect the conductive body 1131 and the absorption capacitor 1132.

[0120] In some embodiments of this application, please refer to FIG9, the first electrode 11311 and the second electrode 11312 are separated and stacked.

[0121] It should be noted that the first electrode 11311 and the second electrode 11312 are separated, that is, the first electrode 11311 and the second electrode 11312 do not contact each other, so as to insulate the first electrode 11311 and the second electrode 11312 from each other.

[0122] In some embodiments, the first electrode 11311 and the second electrode 11312 are both sheet-like structures, and the first electrode 11311 and the second electrode 11312 are stacked. For example, the DC connection assembly 113 can be a stacked busbar.

[0123] By adopting the above technical solution, the structure of the DC connection component 113 can be made more compact, effectively improving the internal space utilization of the motor controller 11, thereby effectively reducing the volume of the motor controller 11 and facilitating the optimization of the overall layout structure of the electric drive device 10.

[0124] In some embodiments of this application, please refer to Figures 9 and 13 together. The first electrode 11311 has a first connecting surface 11315, and the first pin 11322 is connected to the first connecting surface 11315. The second electrode 11312 has a second connecting surface 11316, and the second pin 11323 is connected to the second connecting surface 11316. The first connecting surface 11315 and the second connecting surface 11316 are on the same plane.

[0125] The first connecting surface 11315 provides space for the first pin 11322 to connect to the first electrode 11311, and the second connecting surface 11316 provides space for the second pin 11323 to connect to the second electrode 11312. It can be understood that both the first connecting surface 11315 and the second connecting surface 11316 are planar. The first connecting surface 11315 and the second connecting surface 11316 being on the same plane means that they are parallel to each other and at the same height.

[0126] In some embodiments, the absorption capacitor 1132 is a surface-mount component.

[0127] By adopting the above technical solution, the flatness requirements of the absorption capacitor 1132 can be met, so that the forces on the first pin 11322 and the second pin 11323 are more balanced, which effectively improves the stability of the connection between the absorption capacitor 1132 and the conductive body 1131, thereby effectively improving the working reliability of the DC connection assembly 113.

[0128] In some embodiments of this application, please refer to Figures 9 and 13 together. The first electrode 11311 is provided with a first boss 11317 and a first connecting surface 11315 is disposed on the first boss 11317. The second electrode 11312 is provided with a second boss 11318 and a second connecting surface 11316 is disposed on the second boss 11318.

[0129] In some embodiments, the top of the first boss 11317 and the top of the second boss 11318 are at the same height, the first connecting surface 11315 is disposed on the top of the first boss 11317, and the second connecting surface 11316 is disposed on the top of the second boss 11318. That is, the top surfaces of the first boss 11317 and the second boss 11318 are both planes, and the top surfaces of the first boss 11317 and the second boss 11318 are parallel to each other and at the same height.

[0130] In some embodiments, the first boss 11317 and the second boss 11318 are arranged adjacent to each other so that the absorption capacitor 1132 is electrically connected to the conductive body 1131.

[0131] By adopting the above technical solution, during the manufacturing process of the conductive body 1131, the height of the first connecting surface 11315 and the second connecting surface 11316 can be adjusted by adjusting the height of the first protrusion 11317 and the second protrusion 11318, so as to facilitate the first connecting surface 11315 and the second connecting surface 11316 to be set on the same plane.

[0132] In some embodiments of this application, please refer to Figures 19 and 20 together. The DC connection assembly 113 further includes a circuit board 1138, a first conductive terminal 1139a and a second conductive terminal 1139b. An absorption capacitor 1132 is fixed on the circuit board 1138. The first conductive terminal 1139a is electrically connected between the first electrode 11311 and the first pin 11322, and the second conductive terminal 1139b is electrically connected between the second electrode 11312 and the second pin 11323.

[0133] The circuit board 1138 can be, but is not limited to, a ceramic circuit board 1138, an aluminum substrate, a printed circuit board 1138, a flexible circuit board 1138, etc. The number of circuit boards 1138 can be one or more. For example, please refer to Figure 19, where there is one circuit board 1138, and one or more absorption capacitors 1132 can be provided on the circuit board 1138. For example, please refer to Figure 20, where there are multiple circuit boards 1138, and one or more absorption capacitors 1132 can be provided on each circuit board 1138.

[0134] The first conductive terminal 1139a is a component used for electrically connecting the first pin 11322 and the first electrode 11311. The number of first conductive terminals 1139a can be determined according to the number of absorption capacitors 1132. As an example, there are multiple absorption capacitors 1132 and multiple first conductive terminals 1139a, and the multiple first conductive terminals 1139a are arranged in a one-to-one correspondence with the first pins 11322 of the multiple absorption capacitors 1132.

[0135] The second conductive terminal 1139b is a component used for electrically connecting the second pin 11323 and the second electrode 11312. The number of second conductive terminals 1139b can be determined according to the number of absorption capacitors 1132. As an example, there are multiple absorption capacitors 1132 and multiple second conductive terminals 1139b, and the multiple second conductive terminals 1139b are arranged in a one-to-one correspondence with the second pins 11323 of the multiple absorption capacitors 1132.

[0136] In some embodiments, the circuit board 1138 includes a substrate, a first electrical line (not shown), and a second electrical line (not shown), both disposed on the substrate. A first pin 11322 is electrically connected to one end of the first electrical line, one end of a first conductive terminal 1139a is electrically connected to the other end of the first electrical line, and the other end of the first conductive terminal 1139a is electrically connected to a first electrode 11311, so that the first pin 11322 is electrically connected to the first electrode 11311. A second pin 11323 is electrically connected to one end of the second electrical line, one end of a second conductive terminal 1139b is electrically connected to the other end of the second electrical line, and the other end of the second conductive terminal 1139b is electrically connected to a second electrode 11312, so that the second pin 11323 is electrically connected to the second electrode 11312.

[0137] By adopting the above technical solution, it is easy to electrically connect the conductive body 1131 and the absorption capacitor 1132. Moreover, since the circuit board 1138 has good flatness, it can meet the flatness requirements of the absorption capacitor 1132, so that the force on the first pin 11322 and the second pin 11323 is more balanced, effectively reducing the risk of the electrical connection path between the conductive body 1131 and the absorption capacitor 1132 being broken, thereby effectively improving the working reliability of the DC connection component 113.

[0138] In some embodiments of this application, please refer to Figures 9, 12 and 13 together. The DC connection assembly 113 also includes an insulating member 1133, which covers at least a portion of the conductive body 1131.

[0139] The insulating component 1133 is a component used to insulate and separate the conductive body 1131 from other conductive components. Understandably, at least a portion of the first DC input terminal 11319 and at least a portion of the first DC output terminal 11313 are exposed outside the insulating component 1133 so that the conductive body 1131 is electrically connected to the bus capacitor 112 and the first power module 111.

[0140] In some embodiments, the insulating element 1133 may be integrally molded using an injection molding process. As an example, the insulating element 1133 may be injection molded onto the conductive body 1131. As an example, the insulating element 1133 may also be separately molded using an injection molding process first, and then the insulating element 1133 and the conductive body 1131 may be assembled together.

[0141] In some embodiments, the conductive body 1131 includes a first electrode 11311 and a second electrode 11312, and at least a portion of the insulating member 1133 is disposed between the first electrode 11311 and the second electrode 11312 to insulate and separate the first electrode 11311 from the second electrode 11312.

[0142] By adopting the above technical solution, the conductive body 1131 can be insulated and separated from other conductive components, which effectively reduces the risk of short circuit in the motor controller 11 and thus effectively improves the working reliability of the motor controller 11.

[0143] In some embodiments of this application, please refer to Figures 10 and 11 together. The insulating member 1133 has a first cavity 11333, and the absorption capacitor 1132 is housed in the first cavity 11333.

[0144] The number of first cavities 11333 can be one or more. Each first cavity 11333 can accommodate one absorption capacitor 1132 or multiple absorption capacitors 1132.

[0145] By adopting the above technical solution, not only is the position of the absorption capacitor 1132 effectively restricted, but it also plays a protective role for the absorption capacitor 1132, reducing the risk of the absorption capacitor 1132 colliding with other components, thereby effectively improving the working reliability of the DC connector.

[0146] In some embodiments of this application, please refer to Figures 10 and 11 together. The insulating member 1133 includes an insulating body 11331 and a retaining edge 11332. The insulating body 11331 covers at least a portion of the conductive body 1131, and the retaining edge 11332 is disposed on the insulating body 11331 and defines a first cavity 11333.

[0147] The insulating body 11331 is the main part of the insulating component 1133, and it covers the conductive body 1131. The retaining edge 11332 defines the first cavity 11333. As an example, the retaining edge 11332 can be annular, and the inner annular space of the retaining edge 11332 constitutes the first cavity 11333. The insulating body 11331 and the retaining edge 11332 can be integrally formed, for example, by injection molding. The insulating body 11331 and the retaining edge 11332 can also be formed separately and then connected into a whole, for example, by injection molding and then bonding them together into a whole.

[0148] By adopting the above technical solution, it is easy to form a first cavity 11333 on the insulating component 1133.

[0149] In some embodiments of this application, please refer to Figures 10 and 11 together. The insulating member 1133 has a first through hole 11334, and the absorbing capacitor 1132 passes through the first through hole 11334 to be electrically connected to the conductive body 1131.

[0150] In some embodiments, the first pin 11322 and the second pin 11323 of the absorption capacitor 1132 can be electrically connected to the conductive body 1131 through the same first via 11334.

[0151] In some embodiments, the first pin 11322 of the absorption capacitor 1132 can be electrically connected to the conductive body 1131 through a first via 11334, and the second pin 11323 of the absorption capacitor 1132 can be electrically connected to the conductive body 1131 through another first via 11334.

[0152] In some embodiments, the insulating member 1133 includes an insulating body 11331 and a retaining edge 11332. The insulating body 11331 covers the conductive body 1131. The retaining edge 11332 is disposed on the insulating body 11331 and defines a first cavity 11333. The absorption capacitor 1132 is housed in the first cavity 11333. A first through hole 11334 is formed on the insulating body 11331 and communicates with the first cavity 11333.

[0153] By adopting the above technical solution, it is easy to electrically connect the conductive body 1131 and the absorption capacitor 1132.

[0154] In some embodiments of this application, please refer to FIG11, the port edge of the first via 11334 away from the conductive body 1131 has a chamfered structure 11335.

[0155] The chamfer structure 11335 is a guide structure used to guide the first pin 11322 and the second pin 11323 of the absorption capacitor 1132 into the first via 11334. The chamfer structure 11335 can be, but is not limited to, a beveled chamfer structure 11335, a rounded chamfer structure 11335, etc.

[0156] During assembly, the first pin 11322 and the second pin 11323 of the absorption capacitor 1132 can enter the first via 11334 along the guide of the chamfered structure 11335, which facilitates the assembly of the absorption capacitor 1132 into the first via 11334 and effectively improves the assembly efficiency of the DC connection assembly 113.

[0157] In some embodiments of this application, please refer to Figures 12 and 13 together. The absorption capacitor 1132 includes a core 11321, and the DC connection assembly 113 also includes a thermally conductive adhesive 1134. The thermally conductive adhesive 1134 covers the core 11321 and is connected to the conductive body 1131.

[0158] Core 11321 is the main part of absorption capacitor 1132, and the first pin 11322 and the second pin 11323 are both electrically connected to core 11321.

[0159] Thermally conductive adhesive 1134 is a component used to transfer the heat generated by the core 11321 to the conductive body 1131. The thermally conductive adhesive 1134 may cover only a part of the core 11321 or cover the entire core 11321.

[0160] In some embodiments, the insulating member 1133 includes an insulating body 11331 and a retaining edge 11332. The insulating body 11331 covers the conductive body 1131. The retaining edge 11332 is disposed on the insulating body 11331 and defines a first cavity 11333. An absorption capacitor 1132 is housed in the first cavity 11333. The insulating body 11331 has a first through hole 11334. The absorption capacitor 1132 and the conductive body 1131 are electrically connected through the first through hole 11334. Thermally conductive adhesive 1134 is potted in the first cavity 11333 to wrap at least a portion of the core 11321 and to connect with the conductive body 1131 through the first through hole 11334, so that the heat generated by the core 11321 is transferred to the conductive body 1131 through the thermally conductive adhesive 1134.

[0161] By adopting the above technical solution, the heat generated by the core 11321 can be transferred to the conductive body 1131 through the thermally conductive adhesive 1134, which effectively improves the heat dissipation efficiency of the core 11321 and thus effectively improves the working reliability of the DC connection assembly 113.

[0162] In some embodiments of this application, please refer to Figures 14, 15, 17 and 18 together. The DC connection assembly 113 further includes a first heat-conducting element 1135. The first heat-conducting element 1135 includes a first heat-conducting part 11351 and a second heat-conducting part 11352 that are heat-conductingly connected. The first heat-conducting part 11351 is heat-conductingly connected to the core 11321, and the second heat-conducting part 11352 is heat-conductingly connected to the conductive body 1131.

[0163] The first heat-conducting element 1135 is a component used to transfer the heat generated by the core 11321 to the conductive body 1131. The first heat-conducting part 11351 is thermally connected to the core 11321. The first heat-conducting part 11351 can be in direct contact with the core 11321 so that the heat generated by the core 11321 can be directly transferred to the first heat-conducting part 11351. Alternatively, the first heat-conducting part 11351 can be connected to the core 11321 through other heat-conducting structures so that the heat generated by the core 11321 can be transferred to the first heat-conducting part 11351 through these other heat-conducting structures. The second heat-conducting part 11352 is thermally connected to the conductive body 1131. The second heat-conducting part 11352 can be in direct contact with the conductive body 1131 so that the heat in the second heat-conducting part 11352 can be directly transferred to the conductive body 1131. Alternatively, the second heat-conducting part 11352 can be connected to the conductive body 1131 through other heat-conducting structures so that the heat in the second heat-conducting part 11352 can be transferred to the conductive body 1131 through other heat-conducting structures.

[0164] In some embodiments, the insulating member 1133 is further provided with a second through hole, through which the second heat-conducting part 11352 passes and is thermally connected to the conductive body 1131.

[0165] The first heat-conducting part 11351 and the second heat-conducting part 11352 can be directly connected so that the heat in the first heat-conducting part 11351 can be directly transferred to the second heat-conducting part 11352. Alternatively, the first heat-conducting part 11351 and the second heat-conducting part 11352 can be connected through other heat-conducting structures so that the heat in the first heat-conducting part 11351 can be transferred to the second heat-conducting part 11352 through other heat-conducting structures.

[0166] In some embodiments, the first heat-conducting element 1135 further includes a first connecting portion 11353, which is connected to the insulating element 1133 to fix the first heat-conducting element 1135. The connection method between the first connecting portion 11353 and the insulating element 1133 can be, but is not limited to, a thermal riveting connection, a threaded connection, etc.

[0167] In some embodiments, when there are multiple absorption capacitors 1132, the first heat-conducting element 1135 may also include multiple first heat-conducting portions 11351, each of which is thermally connected to the core 11321 of an absorption capacitor 1132. As an example, the first heat-conducting element 1135 includes two first heat-conducting portions 11351, which are thermally connected to the cores 11321 of two adjacent absorption capacitors 1132, respectively.

[0168] By adopting the above technical solution, at least part of the heat generated by the core 11321 can be transferred to the conductive body 1131 through the first heat-conducting element 1135, which effectively improves the heat dissipation efficiency of the core 11321 and thus effectively improves the working reliability of the DC connection assembly 113.

[0169] In some embodiments of this application, please refer to Figures 14 and 18 together. The DC connection assembly 113 further includes a first insulating thermal pad 1136a, which is disposed between the first thermally conductive part 11351 and the core 11321 to thermally connect and insulate the first thermally conductive part 11351 and the core 11321.

[0170] The first insulating thermal pad 1136a is a component made of a material with insulating properties and a high thermal conductivity.

[0171] In some embodiments, the first heat-conducting part 11351 and the core 11321 can cooperate to clamp the first insulating heat-conducting pad 1136a, so that the heat of the core 11321 is transferred to the first heat-conducting part 11351 through the first insulating heat-conducting pad 1136a.

[0172] By adopting the above technical solution, it is not only convenient to connect the first heat-conducting part 11351 and the core 11321 in a heat-conducting connection, but also to reduce the risk of short circuit between the first heat-conducting part 11351 and the core 11321, thereby further improving the working reliability of the DC connection assembly 113.

[0173] In some embodiments of this application, please refer to Figures 14, 16, 17 and 18 together. The DC connection assembly 113 further includes a second heat-conducting element 1137. The second heat-conducting element 1137 includes a third heat-conducting part 11371 and a fourth heat-conducting part 11372 that are thermally connected to each other. The first heat-conducting part 11351 is thermally connected to one side of the core 11321, the third heat-conducting part 11371 is thermally connected to the other side of the core 11321, and the fourth heat-conducting part 11372 is thermally connected to the conductive body 1131.

[0174] The second heat-conducting element 1137 is a component used to transfer the heat generated by the core 11321 to the conductive body 1131. The third heat-conducting part 11371 is thermally connected to the core 11321. The third heat-conducting part 11371 can be in direct contact with the core 11321 so that the heat generated by the core 11321 can be directly transferred to the third heat-conducting part 11371. Alternatively, the third heat-conducting part 11371 can be connected to the core 11321 through other heat-conducting structures so that the heat generated by the core 11321 can be transferred to the third heat-conducting part 11371 through other heat-conducting structures. The fourth heat-conducting part 11372 is thermally connected to the conductive body 1131. The fourth heat-conducting part 11372 can be in direct contact with the conductive body 1131 so that the heat in the fourth heat-conducting part 11372 can be directly transferred to the conductive body 1131. Alternatively, the fourth heat-conducting part 11372 can be connected to the conductive body 1131 through other heat-conducting structures so that the heat in the fourth heat-conducting part 11372 can be transferred to the conductive body 1131 through other heat-conducting structures.

[0175] The first heat-conducting part 11351 is thermally connected to one side of the core 11321, and the third heat-conducting part 11371 is thermally connected to the other side of the core 11321. This means that the first heat-conducting part 11351 and the third heat-conducting part 11371 are thermally connected to different parts of the core 11321, respectively. As an example, the first heat-conducting part 11351 is thermally connected to the top of the core 11321, and the third heat-conducting part 11371 is thermally connected to the side of the core 11321.

[0176] In some embodiments, the insulating member 1133 further has a third through hole, through which the fourth heat-conducting part 11372 passes and is thermally connected to the conductive body 1131. As an example, the third through hole may communicate with the first through hole 11334. As an example, the third through hole may communicate with the second through hole. As an example, the third through hole may communicate with both the first through hole 11334 and the second through hole.

[0177] The third heat-conducting part 11371 and the fourth heat-conducting part 11372 can be directly connected so that the heat in the third heat-conducting part 11371 can be directly transferred to the fourth heat-conducting part 11372. Alternatively, the third heat-conducting part 11371 and the fourth heat-conducting part 11372 can be connected through other heat-conducting structures so that the heat in the third heat-conducting part 11371 can be transferred to the fourth heat-conducting part 11372 through other heat-conducting structures.

[0178] In some embodiments, the second heat-conducting element 1137 further includes a second connecting portion 11373, which is connected to the insulating element 1133 to fix the second heat-conducting element 1137. The connection method between the second connecting portion 11373 and the insulating element 1133 can be, but is not limited to, a thermal riveting connection, a threaded connection, etc.

[0179] In some embodiments, when there are multiple absorption capacitors 1132, the second heat-conducting element 1137 may also include multiple third heat-conducting portions 11371, each of which is thermally connected to the core 11321 of an absorption capacitor 1132. As an example, the second heat-conducting element 1137 includes two third heat-conducting portions 11371, which are thermally connected to the cores 11321 of two adjacent absorption capacitors 1132, respectively.

[0180] By adopting the above technical solution, not only can at least part of the heat generated by the core 11321 be transferred to the conductive body 1131 through the first heat-conducting element 1135, but at least another part of the heat generated by the core 11321 can also be transferred to the conductive body 1131 through the second heat-conducting element 1137, thereby further improving the heat dissipation efficiency of the core 11321 and thus further improving the working reliability of the DC connection assembly 113.

[0181] In some embodiments of this application, please refer to FIG18, the DC connection assembly 113 further includes a second insulating thermally conductive pad 1136b, which is disposed between the third thermally conductive part 11371 and the core 11321 to thermally connect and insulate the third thermally conductive part 11371 and the core 11321.

[0182] The second insulating thermal pad 1136b is a component made of a material with insulating properties and a high thermal conductivity.

[0183] In some embodiments, the third heat-conducting part 11371 and the core 11321 can cooperate to clamp the second insulating heat-conducting pad 1136b, so that the heat of the core 11321 is transferred to the third heat-conducting part 11371 through the second insulating heat-conducting pad 1136b.

[0184] By adopting the above technical solution, it is not only convenient to connect the third heat-conducting part 11371 with the core 11321 through heat conduction, but also to reduce the risk of short circuit between the third heat-conducting part 11371 and the core 11321, thereby further improving the working reliability of the DC connection assembly 113.

[0185] In some embodiments of this application, please refer to FIG18, the DC connection assembly 113 further includes a third insulating thermally conductive pad 1136c, which is disposed between the core 11321 and the conductive body 1131 to thermally connect and insulatingly separate the core 11321 and the conductive body 1131.

[0186] The third insulating thermal pad 1136c is a component made of a material with insulating properties and a high thermal conductivity.

[0187] In some embodiments, a first insulating thermally conductive pad 1136a is disposed between the first thermally conductive portion 11351 and the top of the core 11321 to thermally connect the first thermally conductive portion 11351 and the top of the core 11321; a second insulating thermally conductive pad 1136b is disposed between the third thermally conductive portion 11371 and the side of the core 11321 to thermally connect the third thermally conductive portion 11371 and the side of the core 11321; and a third insulating thermally conductive pad 1136c is disposed between the bottom of the core 11321 and the conductive body 1131 to thermally connect the bottom of the core 11321 and the conductive body 1131.

[0188] By adopting the above technical solution, not only can at least part of the heat generated by the core 11321 be transferred to the conductive body 1131 through the third insulating thermal pad 1136c, further improving the heat dissipation efficiency of the core 11321, but also the risk of short circuit between the conductive body 1131 and the core 11321 can be reduced, thereby further improving the working reliability of the DC connection assembly 113.

[0189] In some embodiments of this application, please refer to Figures 5 and 9 together. The conductive body 1131 includes three-phase first DC output terminals 11313, and each phase first DC output terminal 11313 is electrically connected to at least one absorption capacitor 1132.

[0190] In some embodiments, the first power module 111 includes a three-phase second DC input terminal 1111, and a three-phase first DC output terminal 11313 is configured to correspond one-to-one with the three-phase second DC input terminal 1111.

[0191] In some embodiments, the number of absorption capacitors 1132 provided on each phase first DC output terminal 11313 is the same. As an example, one absorption capacitor 1132 is provided on each phase first DC output terminal 11313.

[0192] By adopting the above technical solution, the DC current output by the three-phase first DC output terminal 11313 can be balanced, thereby further improving the performance of the motor controller 11.

[0193] In some embodiments of this application, the motor controller 11 further includes a second power module 114, and the conductive body 1131 includes a first DC output terminal 11313 and a second DC output terminal 11314. The first DC output terminal 11313 is electrically connected to the first power module 111, and the second DC output terminal 11314 is electrically connected to the second power module 114.

[0194] The second power module 114 is used to convert the DC current output by the battery 20 into AC current. The second power module 114 can be, but is not limited to, a silicon carbide power module, an IGBT (Insulated Gate Bipolar Transistor) power module, etc. Understandably, the first power module 111 is electrically connected to one motor, and the second power module 114 is electrically connected to another motor.

[0195] In some embodiments, the motor controller 11 may further include a second AC connector 117, which is a component for electrically connecting the second power module 114 and the motor. The second AC connector 117 may be, but is not limited to, a copper busbar, wire, etc.

[0196] In some embodiments, the drive unit is electrically connected between the main control unit and the first power module 111 and between the main control unit and the second power module 114. The drive unit is used to convert the logic signal output by the main control unit into voltage and current signals required to drive the first power module 111 and the second power module 114.

[0197] In some embodiments, the second power module 114 may include a third DC input terminal 1141, a first DC input terminal 11319 electrically connected to a third DC output terminal 1121, a first DC output terminal 11313 electrically connected to a second DC input terminal 1111, and a second DC output terminal 11314 electrically connected to a third DC input terminal 1141. DC current is transmitted from the third DC output terminal 1121 through the first DC input terminal 11319 to the conductive body 1131, then from the first DC output terminal 11313 through the second DC input terminal 1111 to the first power module 111, and from the second DC output terminal 11314 through the third DC input terminal 1141 to the second power module 114.

[0198] In some embodiments, the conductive body 1131 includes a first electrode 11311 and a second electrode 11312 with opposite polarities. The current input terminal of the first electrode 11311 and the current input terminal of the second electrode 11312 together constitute the first DC input terminal 11319. One current output terminal of the first electrode 11311 and one current output terminal of the second electrode 11312 together constitute the first DC output terminal 11313. The other current output terminal of the first electrode 11311 and the other current output terminal of the second electrode 11312 together constitute the second DC output terminal 11314.

[0199] By adopting the above technical solution, the first power module 111 and the second power module 114 can share a DC power connection component 113, which effectively reduces the number of components in the motor controller 11, makes the structure of the motor controller 11 more compact, and thus effectively reduces the size of the motor controller 11.

[0200] In some embodiments of this application, please refer to Figures 5 and 9 together. The conductive body 1131 includes a three-phase first DC output terminal 11313 and a three-phase second DC output terminal 11314. Each phase first DC output terminal 11313 is electrically connected to at least one absorption capacitor 1132, and each phase second DC output terminal 11314 is electrically connected to at least another absorption capacitor 1132.

[0201] In some embodiments, the first power module 111 includes a three-phase second DC input terminal 1111, and a three-phase first DC output terminal 11313 is configured in a one-to-one correspondence with the three-phase second DC input terminal 1111. The second power module 114 includes a three-phase third DC input terminal 1141, and a three-phase second DC output terminal 11314 is configured in a one-to-one correspondence with the three-phase third DC input terminal 1141.

[0202] In some embodiments, the number of absorption capacitors 1132 provided on each phase first DC output terminal 11313 is the same, and the number of absorption capacitors 1132 provided on each phase second DC output terminal 11314 is the same. As an example, one absorption capacitor 1132 is provided on each phase first DC output terminal 11313, and one absorption capacitor 1132 is provided on each phase second DC output terminal 11314.

[0203] By adopting the above technical solution, the DC current output by the three-phase first DC output terminal 11313 and the DC current output by the three-phase second DC output terminal 11314 can be balanced, thereby further improving the performance of the motor controller 11.

[0204] In some embodiments of this application, the first power module 111 and the second power module 114 are arranged side by side along a first direction, and the DC connection component 113 is disposed between the first power module 111 and the second power module 114. The first direction is perpendicular to the height direction of the motor controller 11.

[0205] The motor controller 11 has a height direction, a length direction, and a width direction. For example, the height direction can be the Z direction as shown in Figures 4 to 7; the length direction can be the X direction as shown in Figures 4, 5, and 7; and the width direction can be the Y direction as shown in Figures 4, 5, and 6. It should be noted that the dimension of the motor controller 11 along the length direction can be equal to or unequal to the dimension of the motor controller 11 along the width direction.

[0206] The first direction can be any direction perpendicular to the height direction of the motor controller 11. The first power module 111 and the second power module 114 being arranged side-by-side along the first direction means that the first power module 111 and the second power module 114 are at the same height, and the projection of the first power module 111 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. For example, the first direction can be the length direction of the motor controller 11, meaning the first power module 111 and the second power module 114 are arranged side-by-side along the length direction of the motor controller 11. For example, the first direction can be the width direction of the motor controller 11, meaning the first power module 111 and the second power module 114 are arranged side-by-side along the width direction of the motor controller 11.

[0207] By adopting the above technical solution, the height of the motor controller 11 is effectively reduced, making the structure of the motor controller 11 more compact and which is conducive to optimizing the overall layout structure of the electric drive device 10.

[0208] Secondly, please refer to Figure 3. This application provides an electric drive device 10, which includes a first motor 12 and a motor controller 11 as described in any of the above embodiments. A first power module 111 is electrically connected to the first motor 12.

[0209] The electric drive device 10 provided in this application embodiment effectively improves the performance of the electric drive device 10 by employing the motor controller 11 described in any of the above embodiments.

[0210] Thirdly, referring to Figure 3, this application provides an electric drive device 10, including a first motor 12, a second motor 13, and a motor controller 11 as described in any of the above embodiments. A first power module 111 is electrically connected to the first motor 12, and a second power module 114 is electrically connected to the second motor 13.

[0211] The electric drive device 10 provided in this application embodiment effectively improves the performance of the electric drive device 10 by employing the motor controller 11 described in any of the above embodiments.

[0212] Fourthly, referring to Figure 1, this application provides an electric drive system 1, including a battery 20 and an electric drive device 10 as described in any of the above embodiments, wherein the battery 20 is electrically connected to the electric drive device 10.

[0213] The electric drive system 1 provided in this application embodiment effectively improves the performance of the electric drive system 1 by employing the electric drive device 10 described in any of the above embodiments.

[0214] Fifthly, referring to Figure 1, this application embodiment provides an electric device including the above-described electric drive system 1.

[0215] The electric device provided in this application embodiment effectively improves the performance of the electric device by adopting the electric drive system 1 described in any of the above embodiments.

[0216] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A motor controller, characterized in that, include: First power module; Bus capacitor; A DC connection assembly includes a conductive body and an absorption capacitor. The conductive body is electrically connected between the first power module and the bus capacitor, and the absorption capacitor is electrically connected to the conductive body.

2. The motor controller as described in claim 1, characterized in that, The conductive body includes a first electrode and a second electrode with opposite polarities. The absorption capacitor includes a first pin with the same polarity as the first electrode and a second pin with the same polarity as the second electrode. The first pin is electrically connected to the first electrode, and the second pin is electrically connected to the second electrode.

3. The motor controller as described in claim 2, characterized in that, The first electrode and the second electrode are separated and stacked.

4. The motor controller as described in claim 2, characterized in that, The first electrode has a first connecting surface, and the first pin is connected to the first connecting surface. The second electrode has a second connecting surface, and the second pin is connected to the second connecting surface. The first connecting surface and the second connecting surface are on the same plane.

5. The motor controller as described in claim 4, characterized in that, The first electrode has a first boss and the first connecting surface is disposed on the first boss. The second electrode has a second boss and the second connecting surface is disposed on the second boss.

6. The motor controller as described in claim 2, characterized in that, The DC connection assembly further includes a circuit board, a first conductive terminal and a second conductive terminal, the absorption capacitor is fixed on the circuit board, the first conductive terminal is electrically connected between the first electrode and the first pin, and the second conductive terminal is electrically connected between the second electrode and the second pin.

7. The motor controller as described in claim 1, characterized in that, The DC connection assembly further includes an insulating element that covers at least a portion of the conductive body.

8. The motor controller as described in claim 7, characterized in that, The insulating component has a first cavity, and the absorbing capacitor is housed within the first cavity.

9. The motor controller as described in claim 8, characterized in that, The insulating element includes an insulating body and a retaining edge, the insulating body covering at least a portion of the conductive body, and the retaining edge disposed on the insulating body and defining the first cavity.

10. The motor controller as described in claim 7, characterized in that, The insulating component has a first through hole, and the absorbing capacitor passes through the first through hole to be electrically connected to the conductive body.

11. The motor controller as described in claim 10, characterized in that, The port edge of the first via, away from the conductive body, has a chamfered structure.

12. The motor controller as described in claim 1, characterized in that, The absorption capacitor includes a core, and the DC connection assembly further includes thermally conductive adhesive, which covers at least a portion of the core and is connected to the conductive body.

13. The motor controller as described in claim 1, characterized in that, The absorption capacitor includes a core, and the DC connection assembly further includes a first thermally conductive element. The first thermally conductive element includes a first thermally conductive part and a second thermally conductive part that are thermally connected. The first thermally conductive part is thermally connected to the core, and the second thermally conductive part is thermally connected to the conductive body.

14. The motor controller as described in claim 13, characterized in that, The DC connection assembly further includes a first insulating thermally conductive pad, which is disposed between the first thermally conductive part and the core to thermally connect and insulate the first thermally conductive part and the core.

15. The motor controller as described in claim 13, characterized in that, The DC connection assembly further includes a second thermally conductive element, which includes a third thermally conductive part and a fourth thermally conductive part that are thermally connected to each other. The first thermally conductive part is thermally connected to one side of the core, the third thermally conductive part is thermally connected to the other side of the core, and the fourth thermally conductive part is thermally connected to the conductive body.

16. The motor controller as described in claim 15, characterized in that, The DC connection assembly further includes a second insulating thermally conductive pad, which is disposed between the third thermally conductive part and the core to thermally connect and insulate the third thermally conductive part and the core.

17. The motor controller as described in claim 13, characterized in that, The DC connection assembly further includes a third insulating thermally conductive pad, which is disposed between the core and the conductive body to thermally connect and insulatingly separate the core and the conductive body.

18. The motor controller according to any one of claims 1-17, characterized in that, The conductive body includes three-phase first DC output terminals, and each phase of the first DC output terminal is electrically connected to at least one of the absorption capacitors.

19. The motor controller according to any one of claims 1-17, characterized in that, The motor controller further includes a second power module. The conductive body includes a first DC output terminal and a second DC output terminal. The first DC output terminal is electrically connected to the first power module, and the second DC output terminal is electrically connected to the second power module.

20. The motor controller as described in claim 19, characterized in that, The conductive body includes three-phase first DC output terminals and three-phase second DC output terminals. Each phase of the first DC output terminal is electrically connected to at least one of the absorption capacitors, and each phase of the second DC output terminal is electrically connected to at least another absorption capacitor.

21. The motor controller as described in claim 19, characterized in that, The first power module and the second power module are arranged side by side along a first direction, and the DC connection component is disposed between the first power module and the second power module. The first direction is perpendicular to the height direction of the motor controller.

22. An electric drive device, characterized in that, The electric drive device includes a first motor and a motor controller as described in any one of claims 1-21, wherein the first power module is electrically connected to the first motor.

23. 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 19-21, wherein the first power module is electrically connected to the first motor, and the second power module is electrically connected to the second motor.

24. An electric drive system, characterized in that, The electric drive system includes a battery and an electric drive device as described in claim 22 or 23, wherein the battery is electrically connected to the electric drive device.

25. An electric device, characterized in that, The electric device includes the electric drive system as described in claim 24.

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