Power module, motor controller, powertrain, and vehicle

Abstract

A power module, a motor controller, a power assembly and a vehicle, the power module comprising a first power tube and a second power tube, the first power tube comprising a first power tube body and a first alternating current terminal, the second power tube comprising a second power tube body and a second alternating current terminal, the first power tube body and the second power tube body being stacked along a first direction. In the technical scheme of the present application, the first power tube body and the second power tube body are stacked, when the first power tube is turned on, the second power tube body connected with the first power tube body will be reversely biased, and then a recovery current opposite to the internal current of the first power tube body is generated in the second power tube body. The magnetic field generated by the opposite recovery current and the magnetic field generated by the current in the first power tube body offset each other, so as to reduce the stray inductance in the power module circuit and improve the electromagnetic compatibility of the power module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor devices, in particular to a power module, a motor controller, a power assembly and a vehicle. BACKGROUND

[0002] The power supply system includes a power supply, an electrical device and a power module. The power module is used to convert AC power of the power supply into DC power or convert DC power of the power supply into AC power, and transmit to the electrical device for use.

[0003] The power module will generate stray inductance during use. When the current of the power module suddenly changes, the stray inductance will affect the normal use of the power module. How to reduce the stray inductance in the power module has been a problem to be solved in the industry. SUMMARY

[0004] The purpose of the present application is to provide a power module, a motor controller, a power assembly and a vehicle, and to provide a power module with low stray inductance.

[0005] To achieve the purpose of the present application, in a first aspect, the present application provides a power module, which comprises a first power tube and a second power tube, the first power tube comprises a first power tube body and a first AC terminal, the first AC terminal is arranged on one side of the first power tube body; the second power tube comprises a second power tube body and a second AC terminal, the second AC terminal is arranged on one side of the second power tube body respectively; the first power tube body and the second power tube body are arranged in a first direction.

[0006] Wherein, the first AC terminal and the second AC terminal are connected, or the first AC terminal and the second AC terminal are connected through an external conductive part.

[0007] In a possible implementation, the first AC terminal and the second AC terminal are at least partially arranged in the first direction.

[0008] In a possible implementation, the first AC terminal comprises a first connecting part and a second connecting part connected with each other, the first connecting part is connected with the first power tube body;

[0009] The second AC terminal comprises a third connecting part and a fourth connecting part connected with each other, the third connecting part is connected with the second power tube body;

[0010] The third connecting part is arranged in a stack along the first direction with the first connecting part; and the second connecting part and the fourth connecting part are arranged in a stack along a second direction, the second direction being a direction intersecting the first direction, and the second connecting part and the fourth connecting part are connected.

[0011] In a possible implementation, the first power tube further includes a first DC terminal connected to a side of the first power tube body away from the first AC terminal;

[0012] The second power tube further includes a second DC terminal connected to a side of the second power tube body away from the second AC terminal, and the first DC terminal and the second DC terminal are arranged in a stack at least partially in the first direction.

[0013] In a possible implementation, the first DC terminal includes a fifth connecting part and a sixth connecting part connected to each other, and the fifth connecting part is connected to the first power tube body;

[0014] The second DC terminal includes a seventh connecting part and an eighth connecting part connected to each other, and the seventh connecting part is connected to the second power tube body, and the seventh connecting part is arranged in the first direction away from the fifth connecting part.

[0015] In a possible implementation, one end of the sixth connecting part is connected to the fifth connecting part, and the other end extends in the first direction;

[0016] One end of the eighth connecting part is connected to the seventh connecting part, and the other end extends in the first direction.

[0017] In a possible implementation, the sixth connecting part and the eighth connecting part are arranged in a stack along a second direction, the second direction being a direction intersecting the first direction.

[0018] In a possible implementation, the first power tube body includes a first package and a first chip, and the first chip is packaged in the first package;

[0019] The second power tube body includes a second package and a second chip, and the second chip is packaged in the second package.

[0020] In a possible implementation, the first chip and the second chip include insulated gate bipolar transistors and diodes; or

[0021] The first chip and the second chip include metal oxide semiconductor field effect tubes; or

[0022] The first chip and the second chip comprise silicon carbide controllable semiconductor devices.

[0023] In a possible implementation, the power module comprises a plurality of first power tubes arranged along a second direction and a plurality of second power tubes arranged along the second direction.

[0024] The first power tubes and the second power tubes are arranged in one-to-one correspondence.

[0025] In a possible implementation, the power module further comprises a first heat exchange plate, which is arranged between the first power tubes and the second power tubes.

[0026] In a possible implementation, the power module further comprises a second heat exchange plate and a third heat exchange plate, the second heat exchange plate is arranged on a side of the first power tubes away from the first heat exchange plate, and the third heat exchange plate is arranged on a side of the second power tubes away from the second heat exchange plate.

[0027] In a possible implementation, the first heat exchange plate has a first heat exchange cavity, the second heat exchange plate has a second heat exchange cavity, and the third heat exchange plate has a third heat exchange cavity, and the first heat exchange cavity, the second heat exchange cavity, and the third heat exchange cavity are in communication with each other.

[0028] Among the first heat exchange plate, the second heat exchange plate, and the third heat exchange plate, at least one is provided with a liquid inlet, and at least one is provided with a liquid outlet, the liquid inlet is used for flowing in cooling liquid, and the liquid outlet is used for flowing out cooling liquid.

[0029] In a possible implementation, the first heat exchange plate, the second heat exchange plate, and the third heat exchange plate are fixedly connected with each other.

[0030] In a second aspect, the application further provides an electric machine controller, comprising a power module, the first AC terminal and the second AC terminal are connected, the power module comprises a first power tube and a second power tube, the first power tube comprises a first power tube body and a first AC terminal, the first AC terminal is arranged on one side of the first power tube body; the second power tube comprises a second power tube body and a second AC terminal, the second AC terminal is arranged on one side of the second power tube body; the first power tube body and the second power tube body are arranged in a stack along a first direction.

[0031] The first AC terminal and the second AC terminal are connected, or the first AC terminal and the second AC terminal are connected through an external conductive member.

[0032] In a possible implementation, the motor controller further comprises a capacitor, the capacitor comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is configured to be connected with a positive connecting piece of a DC bus, the other end of the first connecting piece is connected with the first DC terminal, one end of the second connecting piece is configured to be connected with a negative connecting piece of the DC bus, the other end of the second connecting piece is connected with the second DC terminal, and the power module comprises a first power tube and a second power tube, the first power tube and the second power tube are arranged in a stack along a first direction.

[0033] In a possible implementation, the motor controller further comprises a three-phase conductive row.

[0034] The power module comprises three groups of first power tubes and three groups of second power tubes, and the first AC terminal and the second AC terminal are connected in a one-to-one correspondence.

[0035] One end of the three-phase conductive row is connected with the three groups of connected first AC terminals and second AC terminals, and the other end is configured to be connected with a motor winding.

[0036] In a possible implementation, the motor controller further comprises a first drive plate and a second drive plate, the first drive plate is arranged on a side of the first power tube away from the second power tube, and the second drive plate is arranged on a side of the second power tube away from the first power tube.

[0037] The first power tube further comprises a first signal terminal connected with the first power tube body, the first signal terminal is bent towards the first drive plate and connected with the first drive plate, and the second signal terminal is bent towards the second drive plate and connected with the second drive plate.

[0038] In a third aspect, the application further provides a power assembly, the power assembly comprising a motor controller, the motor controller comprising a power module, a first AC terminal and a second AC terminal are connected, the power module comprises a first power tube and a second power tube, the first power tube comprises a first power tube body and a first AC terminal, the first AC terminal is arranged on a side of the first power tube body, the second power tube comprises a second power tube body and a second AC terminal, the second AC terminal is arranged on a side of the second power tube body, and the first power tube body and the second power tube body are arranged in a stack along a first direction.

[0039] The first AC terminal and the second AC terminal are connected, or the first AC terminal and the second AC terminal are connected through an external conductive piece.

[0040] In a fourth aspect, the application further provides a vehicle, which comprises a power assembly, the power assembly comprising a motor controller, the motor controller comprising a power module, the first AC terminal and the second AC terminal being connected, the power module comprising a first power tube and a second power tube, the first power tube comprising a first power tube body and a first AC terminal, the first AC terminal being arranged on one side of the first power tube body; the second power tube comprising a second power tube body and a second AC terminal, the second AC terminal being arranged on one side of the second power tube body; the first power tube body and the second power tube body being arranged in a stack along a first direction.

[0041] The first AC terminal and the second AC terminal are connected, or the first AC terminal and the second AC terminal are connected through an external conductive member.

[0042] In the technical scheme of the application, the first power tube body and the second power tube body are arranged in a stack, when the first power tube is turned on, the second power tube body connected with the first power tube body will be reversely biased, and then a recovery current opposite to the internal current of the first power tube body is generated in the second power tube body. The magnetic field generated by the recovery current is opposite to the magnetic field generated by the internal current of the first power tube body, so as to reduce the stray inductance in the power module circuit and improve the electromagnetic compatibility of the power module. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0044] Figure 1 A cross-sectional view of the first power tube and the second power tube provided by the application;

[0045] Figure 2 A top view of the first power tube;

[0046] Figure 3 A top view of the second power tube;

[0047] Figure 4 A current flow direction diagram of the first power tube and the second power tube;

[0048] Figure 5 A perspective structural schematic diagram of the power module provided by the application;

[0049] Figure 6 An equivalent circuit diagram of Figure 4 ;

[0050] Figure 7 is an exploded view of Figure 5

[0051] Figure 8 is a sectional view of Figure 5

[0052] BRIEF DESCRIPTION OF DRAWINGS

[0053] 1000 power module

[0054] 1 first power tube, 11 first power tube body, 12 first AC terminal, 121 first connecting part, 122 second connecting part, 13 first DC terminal, 131 fifth connecting part, 132 sixth connecting part, 14 first signal terminal

[0055] 2 second power tube, 21 second power tube body, 22 second AC terminal, 221 third connecting part, 222 fourth connecting part, 23 second DC terminal, 231 seventh connecting part, 232 eighth connecting part, 24 second signal terminal

[0056] 3 first heat exchange plate, 31 first housing, 311 first mounting hole, 312 first heat exchange cavity

[0057] 4 second heat exchange plate, 41 second housing, 411 second mounting hole, 412 second heat exchange cavity

[0058] 5 third heat exchange plate, 51 third housing, 511 third mounting hole, 512 third heat exchange cavity

[0059] 6 threaded fastener

[0060] 7 liquid inlet

[0061] 8 liquid outlet

[0062] 9 fin DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0064] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be a middle component.​​

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0066] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other in the case of no conflict.

[0067] The present application provides a vehicle, which can be an electric vehicle or a plug-in hybrid vehicle. The vehicle can be a car, a truck, or a forklift, which is not limited in the present application. The vehicle includes a vehicle body, a vehicle, and a power assembly. The vehicle body serves as a support main body of the vehicle, and is used to support and connect other assemblies and parts of the vehicle. The vehicle wheels are rotatably connected to the vehicle body, and the vehicle body can be provided with two, three, or four vehicle wheels, which is not limited in the present application. The power assembly is arranged on the vehicle body and is drivingly connected to the vehicle wheels. The power assembly is used to drive the vehicle wheels to rotate, and can drive the vehicle to move forward by driving the vehicle wheels to rotate.

[0068] The power assembly includes an electric motor and a reducer. The electric motor serves as a power source of the power assembly, and is used to convert electrical energy into kinetic energy for the forward movement of the vehicle. The reducer is used to adjust the torque of the electric motor acting on the vehicle wheels, thereby adjusting the speed of the vehicle wheels. The electric motor includes an electric motor controller and a drive circuit. The drive circuit is used to drive the electric motor to move, so as to convert the electrical energy of the power supply into the kinetic energy of the electric motor movement. The electric motor controller is connected between the power supply and the drive circuit, and is used to control the electric motor to work in a set direction, speed, angle, and response time.

[0069] The electric motor controller includes a power module, a capacitor, a DC bus, a first drive board, and a second drive board. The DC bus is connected between the power supply and the capacitor, and is used to transmit the current of the power supply to the capacitor. The capacitor is connected between the DC bus and the power module. The capacitor includes a first connecting piece and a second connecting piece. One end of the first connecting piece is connected to the positive connecting piece of the DC bus, and the other end is connected to the positive pole of the power module. One end of the second connecting piece is connected to the negative connecting piece of the DC bus, and the other end is connected to the negative pole of the power module. The capacitor is used to filter high-frequency noise in the power supply and provide protection for the power module. The drive board is used to control the opening and closing of the power assembly.

[0070] The power module can have various functions. When the motor is a direct current motor, the power module is used to convert alternating current into direct current for the motor. When the motor is an alternating current motor, the power module is used to convert direct current into alternating current for the motor. The power module includes a first power tube and a second power tube, a first drive plate is arranged on the side of the first power tube away from the second power tube, and a second drive plate is arranged on the side of the second power tube away from the first power tube. The first power tube is connected to the first drive plate, and the second power tube is connected to the second drive plate. The first power tube and the second power tube can be alternately turned on and turned off under the control of the first drive plate and the second drive plate, thereby realizing the change of current direction.

[0071] In related technologies, when the current of the first power tube and the second power plate changes suddenly, the stray inductance in the power module will cause electromagnetic interference to the first power tube and the second power tube, thereby affecting the normal use of the first power tube and the second power tube. To solve the above problem, in the present application, the first power tube and the second power tube are arranged in a stack along a first direction. In this way, when the first power tube is turned on, the first power tube will absorb current and cause the second power tube to be reverse biased for a short time, thereby forming a recovery current in the second power tube opposite to the current flow direction of the first power tube. Since the first power tube and the second power tube are arranged in a stack, the induced magnetic field generated by the recovery current in the second power tube will cancel out the induced magnetic field generated by the first power tube, thereby reducing the stray inductance in the power module circuit and improving the electromagnetic compatibility of the power module.

[0072] In the following, the power module provided by the present application will be described in detail with reference to the accompanying drawings.

[0073] Please refer to Figure 1 and Figure 2 The first power tube 1 includes a first power tube body 11, a first alternating current terminal 12, and a first direct current terminal 13. The first power tube body 11 is used to be turned on and connected under the control of the controller, thereby realizing the change of current flow direction. The first power tube body 11 has a first side and a third side. The first side of the first power tube body 11 is connected to the first alternating current terminal 12 and connected to the alternating current terminal of the motor drive circuit through the first alternating current terminal 12. The third side of the first power tube body 11 is used to be connected to the first direct current terminal 13 and connected to the first connecting piece of the capacitor through the first direct current terminal. The current of the power supply can pass through the direct current busbar, the capacitor, the first direct current terminal, the first power tube body 11, and the first alternating current terminal in sequence, and finally reach the drive circuit of the motor, thereby driving the motor to move. When passing through the first power tube body 11, the direct current of the power supply can be converted into alternating current by the first power tube body 11, thereby supplying the motor.

[0074] Please refer to Figure 1and Figure 3 The second power tube 2 comprises a second power tube body 21, a second alternating current terminal 22 and a second direct current terminal 23. The second power tube body 21 is used to be turned on and connected under the control of the controller, thereby realizing the transformation of the current flow. The second power tube body 21 has a second side and a fourth side. The second side of the second power tube body 21 is connected with the second alternating current terminal 22 and connected with the motor winding of the motor through the second alternating current terminal 22. The fourth side of the second power tube body 21 is used to be connected with the second direct current terminal 23 and connected with the second connecting piece of the capacitor through the second direct current terminal. The polarities of the second direct current terminal and the first direct current terminal are different. The current of the power supply can pass through the direct current busbar, the capacitor, the second direct current terminal, the second power tube body 21 and the second alternating current terminal in turn, and finally reaches the driving circuit of the motor, thereby driving the motor to move. When passing through the second power tube body 21, the direct current of the power supply can be converted into alternating current by the second power tube body 21, thereby supplying the motor.

[0075] Please refer to Figure 4 , Figure 4 is a current flow diagram of the first power tube 1 and the second power tube 2. In the technical solution of the present application, the first power tube body 11 and the second power tube body 21 are arranged in a first direction. The first direction can be the up-down direction or the left-right direction, which is not limited in the present application. In this way, when the first power tube 1 is turned on, the first power tube 1 will absorb current and reverse bias the second power tube 2 in a short time, thereby forming a recovery current in the second power tube 2 which is opposite to the current flow of the first power tube 1. Since the first power tube 1 and the second power tube 2 are arranged in a stack, the induced magnetic field generated by the recovery current in the second power tube 2 will cancel out the induced magnetic field generated by the first power tube 1, thereby reducing the stray inductance in the circuit of the power module 1000 and improving the electromagnetic compatibility of the power module 1000.

[0076] In order to ensure the stability of the power module, the first alternating current terminal 12 and the second alternating current terminal 22 need to be connected with each other. The first alternating current terminal and the second alternating current terminal are connected, or the first alternating current terminal and the second alternating current terminal are connected through an external conductive member. The external conductive member can be a conductive copper bar, a conductive aluminum bar or other conductive members, which are not limited in the present application. In order to facilitate the connection of the first alternating current terminal 12 and the second alternating current terminal 22, in an embodiment of the present application, the first alternating current terminal 12 and the second alternating current terminal 22 are arranged on the same side and at least partially arranged in the first direction. In this way, the wiring distance of the first alternating current terminal 12 and the second alternating current terminal 22 is reduced, the wiring cost of the first alternating current terminal 12 and the second alternating current terminal 22 is reduced, and the wiring difficulty of the first alternating current terminal 12 and the second alternating current terminal 22 is reduced.

[0077] Please refer toFigure 1 and Figure 5 The first AC terminal 12 comprises a first connecting portion 121 and a second connecting portion 122 connected with each other. The first connecting portion 121 and the second connecting portion 122 can be integrally formed or separately formed and then integrally connected. The application does not limit this. The first connecting portion 121 is connected with the first power tube body 11, and the second connecting portion 122 is connected with the AC end of the motor. The second AC terminal 22 comprises a third connecting portion 221 and a fourth connecting portion 222 connected with each other. The third connecting portion 221 and the fourth connecting portion 222 can be integrally formed or separately formed and then integrally connected. The application does not limit this. The third connecting portion 221 is connected with the second power tube body 21, and the fourth connecting portion 222 is connected with the AC end of the motor. The third connecting portion 221 and the first connecting portion 121 are arranged along the first direction. The application arranges the first connecting portion 121 and the second connecting portion 122, and the third connecting portion 221 and the fourth connecting portion 222 in different directions and connected with each other, so as to increase the wiring strength of the first AC terminal 12 and the second AC terminal 22, increase the service life of the first AC terminal 12 and the second AC terminal 22, and improve the stability of the operation of the power module 1000.

[0078] In order to reduce the wiring cost of the first AC terminal 12 and the second AC terminal 22, in an embodiment of the application, the second connecting portion 122 and the fourth connecting portion 222 are arranged along the second direction and are laminated. The second direction and the first direction are two intersecting directions. The second connecting portion 122 and the fourth connecting portion 222 are laminated along the second direction and are connected with each other through the laminated portion, so as to further reduce the wiring distance of the first AC terminal 12 and the second AC terminal 22, reduce the wiring cost of the first AC terminal 12 and the second AC terminal 22, and improve the wiring efficiency of the first AC terminal 12 and the second AC terminal 22. It should be noted that the laminated portion of the second connecting portion 122 and the fourth connecting portion 222 can be connected by welding or by bolts. The application does not limit this. The first direction and the second direction can be two directions intersecting at an angle of 30°, or can be two directions intersecting at an angle of 60°. The application does not limit this. In an embodiment of the application, the first direction and the second direction are two perpendicular directions, so as to reduce the distance between the first AC terminal 12 and the second AC terminal 22 and the first chip and the second chip, optimize the space structure of the power module 1000, reduce the volume of the power module 1000, and improve the space utilization of the power module 1000 for the power supply system.

[0079] In an embodiment of the present application, the first DC terminal 13 and the second DC terminal 23 are arranged on the same side and at least partially spaced apart in the first direction, so as to reduce the wiring distance of the first DC terminal 13 and the second DC terminal 23, reduce the wiring cost of the capacitor and the first DC terminal 13 and the second DC terminal 23, and reduce the wiring difficulty of the first DC terminal 13 and the second DC terminal 23.

[0080] The first DC terminal 13 comprises a fifth connecting portion 131 and a sixth connecting portion 132 connected together, which can be integrally formed or separately formed and then integrally connected, and the present application does not limit this. The fifth connecting portion 131 is connected to the first power tube body 11, and the sixth connecting portion 132 is connected to the first connecting member of the capacitor. The second DC terminal 23 comprises a seventh connecting portion 231 and an eighth connecting portion 232 connected together, which can be integrally formed or separately formed and then integrally connected, and the present application does not limit this. The seventh connecting portion 231 is connected to the second power tube body 21, and the eighth connecting portion 232 is connected to the second connecting member of the capacitor. The seventh connecting portion 231 and the fifth connecting portion 131 are arranged spaced apart in the first direction. The present application increases the wiring strength of the first DC terminal 13 and the second DC terminal 23, increases the service life of the first DC terminal 13 and the second DC terminal 23, and improves the stability of the operation of the power module 1000 by arranging the fifth connecting portion 131 and the sixth connecting portion 132 and the seventh connecting portion 231 and the eighth connecting portion 232 in different directions and connecting them together.

[0081] In an embodiment of the present application, the sixth connecting portion 132 extends in the first direction, and the eighth connecting portion 232 extends in the first direction, so as to change the wiring direction of the first DC terminal 13 and the second DC terminal 23 from the second direction to the first direction, increase the wiring space of the first DC terminal 13 and the second DC terminal 23, reduce the wiring difficulty of the first DC terminal 13 and the second DC terminal 23, and improve the wiring efficiency of the first DC terminal 13 and the second DC terminal 23. At the same time, the sixth connecting portion 132 and the eighth connecting portion 232 extend in the first direction, which can also increase the strength of the first DC terminal 13 and the second DC terminal 23, improve the stability of the wiring of the first DC terminal 13 and the second DC terminal 23, and improve the stability of the operation of the power module 1000.

[0082] In an embodiment of the present application, the sixth connecting part 132 and the eighth connecting part 232 are arranged in a second direction, and when the first power tube 1 is turned on and the second power tube 2 is turned off, or the first power tube 1 is turned off and the second power tube 2 is turned on, the sixth connecting part 132 and the eighth connecting part 232 can just form the same size and opposite direction conduction current. In this way, the magnetic field generated by the sixth connecting part 132 and the eighth connecting part 232 due to current mutation is offset, thereby reducing the stray inductance in the power module 1000 circuit and improving the electromagnetic compatibility of the power module 1000.

[0083] The first power tube body 11 includes a first package and a first chip, the first package is formed with a first packaging cavity, and the first chip is packaged in the first packaging cavity. The first package is used to realize the separate packaging of the first chip, so as to reduce the electromagnetic influence of the second power tube 2 on the first chip and improve the stability of the operation of the first power tube 1.

[0084] The second power tube body 21 includes a second package and a second chip, the second package is formed with a second packaging cavity, and the second chip is packaged in the second packaging cavity. The second package is used to realize the separate packaging of the second chip, so as to reduce the electromagnetic influence of the first power tube 1 on the second chip and improve the stability of the operation of the second power tube 2.

[0085] The first chip and the second chip can be an insulated gate bipolar transistor (IGBT) and a diode, or a metal oxide semiconductor field effect transistor (MOSFET). It can also be a silicon carbide (SIC) controllable semiconductor device, which is not limited in the present application. In order to explain the reason why the first power tube 1 or the second power tube 2 generates recovery current, the insulated gate bipolar transistor and the diode are exemplified. Please refer to Figure 6In the present example, the first chip includes a first insulated gate bipolar transistor and a first diode, and the second chip includes a second insulated gate bipolar transistor and a second diode. When the first power tube 1 is turned on and the second power tube 2 is turned off, the first insulated gate bipolar transistor is connected between the power supply and the electrical equipment under the action of the controller, the first insulated gate bipolar transistor is turned on and absorbs current, and the second diode is reversely biased under the action of the first insulated gate bipolar transistor. Because there are parasitic capacitance and parasitic inductance between the second diode and the first insulated gate bipolar transistor, the second diode will undergo a reverse recovery process, in which the second diode will generate a reverse recovery current and form a reverse recovery current. At this time, because the first power tube 1 and the second power tube 2 are stacked, the magnetic field generated by the recovery current of the second diode will cancel out the induced magnetic field generated by the current in the first insulated gate bipolar transistor. When the second power tube 2 is turned on and the first power tube 1 is turned off, the second insulated gate bipolar transistor and the first diode will also undergo the same changes, thereby reducing the stray inductance generated by the power module 1000 when the circuit changes suddenly and improving the electromagnetic compatibility of the power module 1000.

[0086] Please refer to Figure 5 , Figure 7 and Figure 8 , the power module 1000 further includes a first heat exchange plate 3, the first heat exchange plate 3 has a first shell 31, the first shell 31 is used as the framework of the first heat exchange plate 3, and is used for supporting and connecting the parts of the first heat exchange plate 3. The material of the first shell 31 can be metal, plastic or other heat-conducting materials, which are not limited in the present application. The shape of the first shell 31 can be rectangular, square or other regular or irregular shapes, which are not limited in the present application. The first shell 31 can be a structure independent of the electrical equipment, or can be part of the electrical equipment, which are not limited in the present application. The first shell 31 is formed with a first heat exchange cavity 312 for flowing cooling liquid. The cooling liquid can be cooling water, cooling oil or other low-viscosity, low-corrosion, high-specific heat capacity and non-flammable liquids, which are not limited in the present application.

[0087] The first heat exchange plate 3 is arranged between the first power tube 1 and the second power tube 2, and the first power tube 1 and the second power tube 2 are fixedly connected with the first shell 31. The first power tube 1 and the second power tube 2 can be connected by welding, or can be fixedly connected by using bolts after being coated with thermal silicon grease, and the application does not limit this. When the cooling liquid flows through the first heat exchange cavity 312, the cooling liquid exchanges heat with the first power tube 1 and the second power tube 2, thereby taking away the heat on the side of the first power tube 1 and the second power tube 2 facing the first heat exchange plate 3, reducing the temperature of the first power tube 1 and the second power tube 2, and improving the stability of the operation of the first power tube 1 and the second power tube 2.

[0088] The power module 1000 further includes a second heat exchange plate 4 and a third heat exchange plate 5. The second heat exchange plate 4 has a second shell 41, and the second shell 41 is formed with a second heat exchange cavity 412. The third heat exchange plate 5 has a third shell 51, and the third shell 51 is formed with a third heat exchange cavity 512. The cooling liquid flows between the second heat exchange cavity 412 and the third heat exchange cavity 512. The second shell 41 of the second heat exchange plate 4 is fixedly connected with the first power tube 1. The second shell 41 and the first power tube 1 can be connected by welding, or can be fixedly connected by using bolts after being coated with thermal silicon grease, and the application does not limit this. The third heat exchange plate 5 is arranged on the side of the second power tube 2 away from the second heat exchange plate 4. The third shell 51 of the third heat exchange plate 5 is fixedly connected with the second power tube 2. The third shell 51 and the second power tube 2 can be connected by welding, or can be fixedly connected by using bolts after being coated with thermal silicon grease, and the application does not limit this. When the cooling liquid flows through the second heat exchange cavity 412 and the third heat exchange cavity 512, the cooling liquid takes away the heat on the side of the first power tube 1 facing the second heat exchange plate 4 and the side of the second power tube 2 facing the third heat exchange plate 5, thereby realizing double-sided heat dissipation of the first power tube 1 and the second power tube 2, improving the heat dissipation effect of the first power tube 1 and the second power tube 2, and improving the stability of the operation of the first power tube 1 and the second power tube 2.

[0089] It can be understood that the longer the heat exchange plate is, the more difficult it is to control the flatness of the heat exchange plate, and the more difficult it is for the first power tube 1 and the second power tube 2 to be attached to the surface of the heat exchange plate, and the worse the heat exchange effect. To solve the above problems, the power module 1000 includes a plurality of first power tubes 1 arranged along the second direction and a plurality of second power tubes 2 arranged along the second direction, each first power tube 1 and each second power tube 2 are arranged one by one along the first direction. The first power tube 1 and the second power tube 2 can be arranged in two groups, or arranged in three groups, or arranged in four groups, and the present application does not limit this. Exemplarily, in an implementable manner of the present application, the power module 1000 includes three groups of first power tubes 1 and three groups of second power tubes 2, and the first alternating current terminals 12 and the second alternating current terminals 22 of each group of first power tubes 1 and second power tubes 2 are connected one by one. The motor controller further includes a three-phase conductive row, one end of the three-phase conductive row is connected with the three groups of connected first alternating current terminals 12 and second alternating current terminals 22, and the other end is connected with the motor winding. In this way, the connection of the plurality of first power tubes 1 and the plurality of second power tubes 2 with the motor is realized. The laminated arrangement of the first power tube 1 and the second power tube 2 can control the length of the heat exchange plate along the second direction within a reasonable range, thereby reducing the manufacturing precision of the heat exchange plate, reducing the forming difficulty of the heat exchange plate, and improving the heat exchange effect of the heat exchange plate. At the same time, the shortening of the length of the heat exchange plate along the second direction also makes the power module 1000 applicable to more length direction compact motor controllers, improving the versatility of the power module 1000.

[0090] In an implementable manner of the present application, the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512 are in communication with each other, and the connection of the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512 is sealed by a sealing ring or welding. Among the first heat exchange plate 3, the second heat exchange plate 4, and the third heat exchange plate 5, at least one is provided with a liquid inlet 7, and at least one is provided with a liquid outlet 8, the liquid inlet 7 and the liquid outlet 8 are in communication with the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512, and the cooling liquid can enter the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512 from the liquid inlet 7, and flow out of the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512 from the liquid outlet 8. In this way, by connecting the liquid inlet 7 and the liquid outlet 8 through a set of hydraulic equipment, the flow of the cooling liquid in the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512 can be completed, reducing the layout cost of the power supply system. At the same time, the communication arrangement of the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512 can also promote the heat convection of the first heat exchange cavity 312, the second heat exchange cavity 412, and the third heat exchange cavity 512, so that the cooling liquid can better transfer heat from the high-temperature area to the low-temperature area during the flow process, improve the heat dissipation uniformity, and improve the heat dissipation effect of the heat exchange plate.

[0091] The first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 are fixedly connected with each other, so that the first power tube 1 and the second power tube 2 are locked between the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5, the gap between the first power tube 1, the second power tube 2 and the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 is reduced, the heat dissipation area of the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 for the first power tube 1 and the second power tube 2 is increased, and the heat dissipation effect of the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 for the first power tube 1 and the second power tube 2 is improved.

[0092] The first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 can be connected in various ways. In this application, the first heat exchange plate 3 is provided with a first mounting hole 311, the second heat exchange plate 4 is provided with a second mounting hole 411, and the third heat exchange plate 5 is provided with a third mounting hole 511. The power module 1000 includes a threaded fastener 6, which passes through the first mounting hole 311, the second mounting hole 411 and the third mounting hole 511 in sequence to connect the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 with each other. In this way, the fit clearance of the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 with the first power tube 1 and the second power tube 2 is improved, and the heat dissipation effect of the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 for the power module 1000 is improved.

[0093] In an embodiment of the present application, a plurality of fins 9 are arranged in the first heat exchange cavity 312, the second heat exchange cavity 412 and the third heat exchange cavity 512. The plurality of fins 9 are arranged at intervals in the first heat exchange cavity 312, the second heat exchange cavity 412 and the third heat exchange cavity 512. In this way, the flow time of the cooling liquid in the first heat exchange cavity 312, the second heat exchange cavity 412 and the third heat exchange cavity 512 is delayed, the exchange area of the first heat exchange cavity 312, the second heat exchange cavity 412 and the third heat exchange cavity 512 with the cooling liquid is increased, and the heat exchange effect of the first heat exchange plate 3, the second heat exchange plate 4 and the third heat exchange plate 5 is improved.

[0094] The first power tube 1 further includes a first signal terminal 14, which is connected with the first power tube body 11 and is bent towards the first drive plate and connected with the first drive plate. The first drive plate transmits electrical signals to the first power tube 1 through the first signal terminal 14 to realize control of the first power tube 1.

[0095] The second power tube 2 further includes a second signal terminal 24, which is connected with the second power tube body 21 and is bent towards the second drive plate and connected with the second drive plate. The second drive plate transmits electrical signals to the second power tube 2 through the second signal terminal 24 to realize control of the second power tube 2.

[0096] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the drawings described in the application, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0097] The above only discloses one preferred embodiment of the present application, of course cannot limit the scope of the present application, those skilled in the art can understand that the implementation of all or part of the above-mentioned process, and the equivalent changes made by the claims of the present application, still belong to the scope covered by the present application.

Claims

1. A power module, characterized in that: The first power tube comprises a first power tube body, a first AC terminal, and a first DC terminal, wherein the first AC terminal is provided on one side of the first power tube body; the second power tube comprises a second power tube body, a second AC terminal, and a second DC terminal, wherein the second AC terminals are provided on one side of the second power tube body; the first power tube body and the second power tube body are stacked along a first direction; Wherein, the first AC terminal and the second AC terminal are connected, or the first AC terminal and the second AC terminal are connected through an external conductive member; The first DC terminal includes a fifth connecting portion and a sixth connecting portion connected to each other, and the fifth connecting portion is connected to the first power tube body; The second DC terminal includes a seventh connecting portion and an eighth connecting portion connected to each other, the seventh connecting portion is connected to the second power tube body, and the seventh connecting portion and the fifth connecting portion are spaced apart along the first direction; The sixth connecting portion and the eighth connecting portion are stacked along a second direction, and the second direction and the first direction are two directions intersecting; When the first power tube is turned on and the second power tube is turned off, the sixth connecting portion and the eighth connecting portion can form conduction currents of the same magnitude and opposite directions.

2. The power module according to claim 1, wherein: The first AC terminal and the second AC terminal are at least partially stacked in the first direction.

3. The power module according to claim 2, wherein: The first AC terminal includes a first connecting portion and a second connecting portion connected to each other, and the first connecting portion is connected to the first power tube body; The second AC terminal includes a third connecting portion and a fourth connecting portion connected to each other, and the third connecting portion is connected to the second power tube body; The third connection part and the first connection part are stacked at intervals along the first direction; the second connection part and the fourth connection part are stacked along the second direction, the second direction and the first direction are two intersecting directions, and the second connection part and the fourth connection part are connected.

4. The power module according to any one of claims 1 to 3, wherein: The first power tube body includes a first package body and a first chip, and the first chip is packaged in the first package body; The second power tube body includes a second package body and a second chip, and the second chip is packaged in the second package body.

5. The power module according to claim 4, wherein: The first chip and the second chip include insulated gate bipolar transistors and diodes; or The first chip and the second chip include metal oxide semiconductor field effect transistors; or The first chip and the second chip include silicon carbide controllable semiconductor devices.

6. The power module according to any one of claims 1 to 3, wherein: The power module includes a plurality of first power tubes arranged along the second direction and a plurality of second power tubes arranged along the second direction; The first power tubes and the second power tubes are arranged in a one-to-one correspondence.

7. The power module according to claim 1, wherein: The power module further includes a first heat exchange plate, which is disposed between the first power tube and the second power tube.

8. The power module according to claim 7, wherein: The power module further includes a second heat exchange plate and a third heat exchange plate. The second heat exchange plate is arranged on a side of the first power tube away from the first heat exchange plate. The third heat exchange plate is arranged on a side of the second power tube away from the second heat exchange plate.

9. The power module according to claim 8, wherein: The first heat exchange plate has a first heat exchange cavity, the second heat exchange plate has a second heat exchange cavity, and the third heat exchange plate has a third heat exchange cavity, and the first heat exchange cavity, the second heat exchange cavity, and the third heat exchange cavity are interconnected; At least one of the first heat exchange plate, the second heat exchange plate and the third heat exchange plate is provided with a liquid inlet, and at least one of them is provided with a liquid outlet. The liquid inlet is used for cooling liquid to flow in, and the liquid outlet is used for cooling liquid to flow out.

10. The power module according to claim 8, wherein: The first heat exchange plate, the second heat exchange plate and the third heat exchange plate are fixedly connected to each other.

11. A motor controller, characterized in that: include: The power module according to any one of claims 1 to 10, wherein the first AC terminal and the second AC terminal are connected.

12. The motor controller according to claim 11, characterized in that: The motor controller also includes a capacitor, which includes a first connector and a second connector. One end of the first connector is used to connect to the positive connector of the DC bus, and the other end is connected to the first DC terminal. One end of the second connector is used to connect to the negative connector of the DC bus, and the other end is connected to the second DC terminal.

13. The motor controller according to claim 11, wherein: The motor controller also includes a three-phase conductive bar; The power module includes three groups of first power tubes and three groups of second power tubes, and the first AC terminals and the second AC terminals are connected in a one-to-one correspondence; One end of the three-phase conductive bar is connected to three groups of connected first AC terminals and second AC terminals, and the other end is used to be connected to the motor winding.

14. The motor controller according to claim 11, wherein: The motor controller further includes a first driving board and a second driving board, wherein the first driving board is arranged on a side of the first power tube away from the second power tube, and the second driving board is arranged on a side of the second power tube away from the first power tube; The first power tube further includes a first signal terminal connected to the first power tube body, the first signal terminal is bent toward the first driving board and connected to the first driving board; The second power tube further includes a second signal terminal connected to the first power tube body, and the second signal terminal is bent toward the second driving board and connected to the second driving board.

15. A powertrain, characterized in that: Comprising a motor controller as claimed in claim 11 or 14.

16. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 15.

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