Capacitor module, motor control device, drive assembly, and vehicle

Abstract

The present invention provides a capacitor module, a motor control device, a drive assembly, and a vehicle. The capacitor module includes a housing and a capacitor module, and the capacitor module is disposed within the housing; the capacitor module includes a plurality of capacitors, two electrode connection pieces, and a connection frame; the connection frame is provided with three mounting grooves, and the three mounting grooves are respectively provided with capacitors; the two electrode connection pieces are provided with three connection ends connected to the capacitors. Through the left and right side arrangements and the bottom side arrangement, the stacked arrangement of the capacitors is achieved, optimizing the layout structure to make the structural dimensions more compact, which is beneficial to further reducing the size of the device and equipment. Moreover, by loading the capacitor module into the housing, not only the modular arrangement of the capacitor module is realized, but also it is beneficial to improve the seismic resistance and stability of the device.

Description

Technical Field

[0001] The present invention relates to the field of new energy equipment, and particularly to a capacitor module, a motor control device, a drive assembly, and a vehicle. Background Art

[0002] New energy vehicles have many characteristics such as environmental protection and low pollution because they do not burn gasoline or diesel to generate power. With the popularization and application of new energy power generation such as water energy, wind energy, solar energy, and nuclear energy, many new energy vehicles are gradually being promoted and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail transit vehicles, new energy electric flight vehicles, new energy electric shipping vehicles, etc.

[0003] New energy vehicles are generally equipped with a battery, a motor control device, a motor, and a power generation device. The power tubes in the motor control device receive the direct current output by the battery, and invert the direct current into alternating current for output to the motor. Then the motor outputs rotational driving force to drive the power generation device such as wheels, propellers, etc., and then drives the vehicle to move forward.

[0004] With the integration of the drive assembly, that is, the motor and the motor control device, for vehicles, it is necessary to further optimize and reduce the occupied space of the drive assembly or the motor control device, so as to free up more space for use in the passenger space, battery space, etc. When integrating the motor and the motor controller, it is necessary to consider the wiring structure, wire routing layout, and structural layout between the motor and the motor controller, control the thickness of the motor control device and the radial dimension of the drive assembly, and also cooperate with the reasonable arrangement of many circuit components. In addition, it is necessary to improve the seismic performance of the components to improve the operation stability of the equipment, so as to fully realize the high-efficiency integration of the drive assembly. Summary of the Invention

[0005] The first object of the present invention is to provide a capacitor module with a modular layout.

[0006] The second object of the present invention is to provide a motor control device having the above capacitor module.

[0007] The third object of the present invention is to provide a drive assembly having the above motor control device.

[0008] The fourth object of the present invention is to provide a vehicle having the above drive assembly.

[0009] To achieve the first object of the present invention, the present invention provides a capacitor module, which includes a housing cover and a capacitor module. The capacitor module is disposed within the housing cover. The capacitor module includes a plurality of capacitors, two electrode connection pieces, and a connection frame. The connection frame is provided with a first mounting groove and a second mounting groove on both sides in the first transverse direction, and a third mounting groove is provided on the longitudinal side of the first mounting groove and the second mounting groove. Capacitors are respectively disposed in the first mounting groove, the second mounting groove, and the third mounting groove. The two electrode connection pieces are respectively located on both sides in the second transverse direction of the connection frame. The electrode connection piece is provided with a first connection end connected to the capacitor at the first mounting groove, a second connection end connected to the capacitor at the second mounting groove, and a third connection end connected to the capacitor at the third mounting groove. The electrode connection piece is provided with a fourth connection end on the longitudinal side opposite to the third mounting groove.

[0010] As can be seen from the above solution, the three mounting grooves provided by the connection frame are used for the installation and positioning of the capacitors, and cooperate with the connection of the electrode connection pieces on both sides, thereby realizing the parallel connection of the three capacitors, effectively increasing the capacitance, and realizing the stacked arrangement of the capacitors by arranging them on the left and right sides and the bottom side, optimizing the layout structure to make the structural dimensions more compact, which is beneficial to further reducing the size of the device. Moreover, by loading the capacitor module into the housing cover, not only the modular arrangement of the capacitor module is realized, but also the seismic resistance and stability of the device are improved.

[0011] A further solution is that the housing cover is filled with potting glue, and the potting glue wraps the capacitor module.

[0012] As can be seen from the above, by filling the housing cover with potting glue, not only the stable connection of the capacitor module is improved, but also the insulation and heat conduction are improved by using the potting glue.

[0013] A further solution is that the connection frame is provided with a plurality of hollow holes.

[0014] As can be seen from the above, the plurality of hollow holes can be used for heat conduction and can also cooperate with the penetration of the potting glue, thereby improving the connection stability and high-efficiency heat conduction.

[0015] A further solution is that the connection frame is respectively provided with positioning convex edges in the first mounting groove, the second mounting groove, and the third mounting groove, and the positioning convex edges are in limit cooperation with the capacitors.

[0016] As can be seen from the above, stable support and limitation for the capacitors are provided by the positioning convex edges.

[0017] A further solution is that the electrode connection piece and the connection frame are connected by injection molding.

[0018] As can be seen from the above, the electrode connection piece and the connection frame are connected together by using the injection molding process, which is not only stably connected but also convenient for the connection and assembly of the capacitors.

[0019] Further, the installation direction of the first installation groove is parallel to the installation direction of the second installation groove; the installation direction of the first installation groove is perpendicular to the installation direction of the third installation groove.

[0020] Further, an avoidance groove is provided on the outer wall of the housing cover, near the positions of the second installation groove and the third installation groove.

[0021] As can be seen from the cross-section, the capacitors of the first installation groove and the second installation groove are arranged longitudinally, while the capacitor of the third installation groove located below is arranged transversely. And through the cooperation of the arrangement of the avoidance groove, the capacitor module is arranged in a roughly "L" shape, effectively utilizing the horizontal space and reducing the longitudinal arrangement space.

[0022] To achieve the second object of the present invention, the present invention provides a motor control device, including the capacitor module as described in the above solution.

[0023] To achieve the third object of the present invention, the present invention provides a drive assembly, including the motor control device as described in the above solution.

[0024] To achieve the fourth object of the present invention, the present invention provides a vehicle, including the drive assembly as described in the above solution. Description of the Drawings

[0025] Figure 1 is a structural diagram of an embodiment of the drive assembly of the present invention.

[0026] Figure 2 is a structural diagram of an embodiment of the drive assembly of the present invention from another perspective.

[0027] Figure 3 is an exploded view of an embodiment of the drive assembly of the present invention.

[0028] Figure 4 is a structural diagram of the motor control device in the bottom side view of an embodiment of the drive assembly of the present invention.

[0029] Figure 5 is an exploded view of the motor control device in an embodiment of the drive assembly of the present invention.

[0030] Figure 6 is a structural diagram of the motor control device in an embodiment of the drive assembly of the present invention after omitting the housing.

[0031] Figure 7 is an exploded view of the motor control device in an embodiment of the drive assembly of the present invention after omitting the housing.

[0032] Figure 8 is an exploded view of the capacitor module in an embodiment of the drive assembly of the present invention.

[0033] Figure 9 It is a structural diagram of the electrode terminal block in the drive assembly embodiment of the present invention.

[0034] Figure 10 It is an exploded view of the electrode terminal block in the drive assembly embodiment of the present invention.

[0035] Figure 11 It is a partial cross-sectional view of the electrode terminal block in the drive assembly embodiment of the present invention at the semi-circular groove.

[0036] Figure 12 It is a structural diagram of the motor control device in the drive assembly embodiment of the present invention after omitting the cover and the substrate.

[0037] Figure 13 It is an exploded view of the circuit device in the drive assembly embodiment of the present invention.

[0038] Figure 14 It is an exploded view of the circuit device in another state in the drive assembly embodiment of the present invention.

[0039] Figure 15 It is a cross-sectional view of the circuit device in the drive assembly embodiment of the present invention.

[0040] Figure 16 It is a structural diagram of the drive assembly embodiment of the present invention at the housing base.

[0041] Figure 17 It is an exploded view of the connection assembly in the drive assembly embodiment of the present invention.

[0042] Figure 18 It is a cross-sectional view of the connection assembly in the drive assembly embodiment of the present invention.

[0043] Figure 19 It is a cross-sectional view of the cooling bridge in the drive assembly embodiment of the present invention.

[0044] Figure 20 It is a structural diagram of the drive assembly embodiment of the present invention from the perspective of the control interface seat.

[0045] The present invention will be further described below in conjunction with the drawings and embodiments. Detailed Embodiment

[0046] Drive assembly embodiment:

[0047] Refer to Figures 1 to 3 , the drive assembly includes a motor 2 and a motor control device 1, and the motor control device 1 is installed on the radial side of the motor housing 21 of the motor 2. Refer to Figures 4 to 7, the motor control device 1 includes a housing, a capacitor module 3, an electrode terminal block 4, a circuit device 5, and a control board 7. The housing includes a control housing 111, a control cover 112, and a connection cover 113. The control housing 111 defines an accommodation cavity, and the control cover 112 and the connection cover 113 cover the control housing 111. The capacitor module 3, the electrode terminal block 4, the circuit device 5, and the control board 7 are disposed in the accommodation cavity.

[0048] Refer to Figure 8 , and in combination with Figure 15 , the capacitor module 3 includes a housing cover 31 and a plurality of capacitor modules. The housing cover 31 is arranged in a bottomed cylindrical shape. An avoidance groove 313 is provided on the outer wall of the housing cover 31. Two or more partition plates 311 are provided in the housing cover 31. The inner wall of the housing cover 31 and the partition plates 311 form placement cavities 312. The plurality of partition plates 311 and the plurality of placement cavities 312 are arranged along the second lateral direction Y. One capacitor module is placed in one placement cavity 312.

[0049] The capacitor module includes a plurality of capacitors 32, two electrode connection pieces 34, and a connection frame 33. The connection frame 33 is provided with a first installation groove 331 and a second installation groove 332 on both sides in the first lateral direction X. The connection frame 33 is provided with a third installation groove 333 on the longitudinal Z side of the first installation groove 331 and the second installation groove 332. The connection frame 33 is provided with a plurality of hollow holes 334. The connection frame 33 is provided with a plurality of positioning convex edges in the first installation groove 331, the second installation groove 332, and the third installation groove 333 respectively. Capacitors 32 are respectively provided in the first installation groove 331, the second installation groove 332, and the third installation groove 333. The plurality of positioning convex edges are located on both sides of the capacitor and are used for limiting and cooperating with the capacitor.

[0050] The two electrode connection pieces 34 and the connection frame 33 are connected by injection molding. The two electrode connection pieces 34 are respectively located on both sides of the connection frame 33 in the second lateral direction Y. The electrode connection piece 34 is provided with a first connection end 341 connected to the capacitor 32 at the first installation groove 331. The electrode connection piece 34 is provided with a second connection end 342 connected to the capacitor 32 at the second installation groove 332. The electrode connection piece 34 is provided with a third connection end 343 connected to the capacitor 32 at the third installation groove 333. The electrode connection piece 34 is provided with a fourth connection end 344 on the longitudinal Z side opposite to the third installation groove 333. The fourth connection end 344 is welded to the substrate as a welding end. One side of the electrode connection piece 34 is used as a positive electrode connection piece, and the other side of the electrode connection piece 34 is used as a negative electrode connection piece.

[0051] After the capacitor module is placed in the placement cavity 312, at the position where the avoidance groove 313 is close to the second installation groove 332 and the third installation groove 333, an avoidance design is realized. Moreover, the installation direction of the first installation groove 331 is parallel to the installation direction of the second installation groove 332, and the installation direction of the first installation groove 331 is perpendicular to the installation direction of the third installation groove 333. That is, the capacitors in the first installation groove 331 are installed longitudinally, and the capacitors in the second installation groove 333 are installed transversely. And the housing 31 is filled with potting glue, and the potting glue wraps the capacitor module. The housing 31 is provided with an opening, and the end of the fourth connection end 344 extends out of the opening, so that the potting glue does not wrap the end of the fourth connection end 344, thus not affecting the welding of the fourth connection end 344 to the substrate.

[0052] Referring to Figures 9 to 11 , the electrode terminal block 4 includes a seat body 41, at least two electrode connection pieces 42 and a filter circuit module 43. The seat body 41 is provided with a wiring bottom wall and a wiring cavity wall. The wiring bottom wall and the wiring cavity wall enclose a wiring cavity 411. The wiring cavity 411 is provided with an operation opening on the longitudinal side opposite to the wiring bottom wall. Two wiring holes 412 are arranged transversely through the wiring cavity wall. The two wiring holes 412 are arranged side by side transversely, and the wiring holes 412 communicate with the wiring cavity 411.

[0053] The two electrode connection pieces 42 can be used as the electrode connection pieces for the positive electrode and the negative electrode respectively. The two electrode connection pieces 42 pass through the wiring cavity wall. The electrode connection pieces 42 are provided with inner connection parts 422 in the wiring cavity 411, and the electrode connection pieces 42 are provided with outer connection parts 421 outside the wiring cavity 411. The seat body 41 and the electrode connection pieces 42 are connected by injection molding.

[0054] The seat body 41 is provided with a partition wall 413 in the wiring cavity 411. The partition wall 413 is located between the two inner connection parts 422. A trigger 45 is arranged at the top of the partition wall 413. The trigger 45 is located at the operation opening of the electrode terminal block 4.

[0055] The filter circuit module 43 includes a substrate 431, a fixing piece 434 and two capacitors 433. A filter circuit is arranged on the substrate 431, and the capacitors 433 are welded on the substrate 431. Two positioning grooves 432 are arranged on the substrate 431. The two capacitors 433 and the two positioning grooves 432 are arranged staggeredly. The fixing piece 434 is arranged in an arched shape and is connected to the substrate 431. The fixing piece 434 is located above the positioning grooves 432 and between the two capacitors 433.

[0056] On the outer bottom wall of the wiring bottom wall, there are two positioning posts 441 and two fixing posts 442. One fixing post 442 is located on the radial side of one positioning post 441. The substrate 431 is provided with a positioning groove 432 that is in limit fit with the positioning post 441. The capacitor 433 is located on one side of the positioning post 441, and the middle capacitor 433 is located between the two positioning posts 441. The fixing piece 434 is connected and fixed to the fixing post 442. On one side of the external connection part 421 of the electrode connection piece 42, there is also a welding foot 423, and the welding foot 423 is welded to the substrate 431. The wiring end of the trigger 45 is located at the outer bottom wall of the wiring bottom wall, and the wiring end of the trigger 45 is connected to the substrate. The end of the positioning post 441 is provided with a positioning hole 443, and the fixing post 442 is provided with a through fixing hole.

[0057] The seat body 41 is provided with an annular groove 414 on the outer periphery of the two wiring holes 412. The annular groove 414 is arranged in an oval shape. At the outer periphery of one of the wiring holes 412, the bottom wall of the annular groove 414 is provided with a semi-annular groove 415. The semi-annular groove 415 is located on the outer periphery of this wiring hole 412. The magnetic ring 46 is arranged in the annular groove 414, and the current sensor (not shown) is arranged in the semi-annular groove 415. The current sensor is located inside the magnetic ring 46. The seat body 41 is provided with a wiring hole 416 at the bottom of the semi-annular groove 415, and the wiring hole 416 is used to arrange the wiring end of the current sensor.

[0058] Referring to Figure 5 、 Figure 12 and Figure 18 As shown in FIGS.

[0059] Referring to Figures 12 to 15, the motor control device further includes a circuit device, a first cover 57, and a second cover 58 disposed within the housing. The circuit device includes a substrate 511, a positive bus bar 512, a negative bus bar 513, a capacitor module 3 electrode connection base 4, and a device component. The device component includes five electrode connection pieces 53, three cooling bridges 54, multiple power tubes 561, a heat conducting sheet 562, and three pressing members 55. The substrate 511, the positive bus bar 512, and the negative bus bar 513 are arranged in a stacked manner in sequence. The positive bus bar 512 and the negative bus bar 513 are metal conductive bus bars. The positive bus bar 512 and the negative bus bar 51 are respectively provided with pins and avoidance holes. The pin of the negative bus bar 51 passes through the avoidance hole of the positive bus bar 512 and is welded to the substrate 511, and the pin of the positive bus bar 512 is welded to the substrate 511.

[0060] The five electrode connection pieces 53 are respectively used as a positive connection piece, a negative connection piece, a U-phase connection piece, a V-phase connection piece, and a W-phase connection piece. The positive connection piece and the negative connection piece are located at the edge and are adjacent to each other. The U-phase connection piece, the V-phase connection piece, and the W-phase connection piece are evenly distributed. The electrode connection piece 53 is provided with a connection end 533 in the horizontal direction, and the electrode connection piece 53 is provided with multiple welding pins 531 in the vertical direction. The welding fixed end is located on the welding pins 531. A second clamping portion 532 is provided between the multiple welding pins 531, and the second clamping portion 532 is arranged in a slot manner. The pins of the electrode connection piece 53 respectively pass through the corresponding avoidance holes and are welded to the substrate 511.

[0061] Refer to Figure 14 and Figure 19, the cooling bridge 54 is internally provided with a cooling channel 541 along the first horizontal direction Y. Cooling interfaces 542 are respectively arranged at both ends of the cooling channel 541 in the first horizontal direction Y. Heat-conducting outer walls 545 are respectively arranged at both ends of the cooling bridge 54 in the second horizontal direction X. The heat-conducting outer walls 545 are arranged in a planar manner and extend along the first horizontal direction Y. Longitudinal end walls 546 and 547 are respectively arranged at both ends of the cooling bridge 54 in the vertical direction. The power tube 561 is adjacent to the heat-conducting outer wall 545, and a heat-conducting sheet 562 can also be adjacent between the power tube 561 and the heat-conducting outer wall 545. In the vertical direction, the cooling interface 542 is located between the two longitudinal end walls 546 and 547. An installation hole 543 and a positioning hole 544 are arranged on one side of the cooling interface 542 of the cooling bridge 54, and the positioning hole 544 is located on one side of the installation hole 543. Three positioning posts 548 are arranged on the longitudinal end wall 546, and the positioning posts 548 and the cooling interface 542 are on the same side in the vertical direction. Connecting pieces 549 are respectively and fixedly arranged at both ends of the cooling bridge 54 in the first horizontal direction Y. The connecting pieces 549 are provided with connecting pins extending in the vertical direction. The cooling interface 542 and the connecting pins are respectively located at both ends in the vertical direction. The connecting pins of the connecting pieces 549, the pins of the power tubes, and the welding pins 531 of the electrode connecting piece 53 respectively pass through the positive busbar 512 and the negative busbar 51 and are welded to the substrate 511. An insulating plate 515 is arranged between the electrode connecting piece 53 and the negative busbar 51, and an insulating plate 514 is arranged between the positive busbar 512 and the negative busbar 51.

[0062] Refer to Figure 5 , there are two installation steps 114 arranged inside the control case 111 of the housing. There is an installation groove between the two installation steps 114. The installation steps 114 are provided with through connection ports 115. The installation steps 114 are also provided with connection holes 116 and positioning posts 117. After the cooling bridge 54 is installed between the installation steps 114, one cooling interface 542 is installed on one installation step 114 and communicated with one connection port 115. The installation hole 543 and the connection hole 116 are fixedly connected by screws. The positioning post 117 and the positioning hole 544 are in limit fit. The longitudinal end wall 547 is located between the two installation steps 114. The control case 111 is provided with an installation groove on the back side of the installation step 114, and the installation groove is used to connect with the cooling flow channel of the motor.

[0063] The pressing member 55 includes a connecting base 551, a plurality of pressing portions 553 and a plurality of connecting portions 555. The connecting base 551 is sheet-shaped and extends along the first horizontal direction Y. The plurality of pressing portions 553 are respectively connected to both sides of the connecting base 551 along the second horizontal direction X and are arranged in a one-to-one opposite manner. The plurality of pressing portions 553 on the same side are arranged along the first horizontal direction Y. A groove 554 is provided between two adjacent pressing portions 553 on the same side. The first horizontal direction Y is perpendicular to the second horizontal direction X. One connecting portion 555 is connected between two adjacent pressing portions 553 on the same side. The connecting portion 555 is close to the free end of the pressing portion 553 and is arranged in a strip shape. The connecting portion 555 is connected between two pressing portions 553 along the first horizontal direction Y. The fixed end of the pressing portion 553 is connected to the connecting base 551. The free end of the pressing portion 553 is provided with an abutting arc surface. A plurality of positioning holes 552 are provided on the connecting base 551. The plurality of positioning holes 552 are arranged along the first horizontal direction Y. The integral pressing member 55 is formed into the connecting base 551, the pressing portions 553, the positioning holes 552 and the connecting portions 55 through stamping and cutting.

[0064] When the pressing member 55 clamps the power tube 561 and the cooling bridge 55, the claw portion of a specific expander extends into the groove 554 and abuts against the connecting portion 555. Then the expander expands the connecting portion 555 and the pressing portion 553 outward and clamps them on the outer sides of the power tubes 561 on both sides, so that the power tubes 561 on both sides and the cooling bridge 55 located therebetween are closely fitted. Then the expander is removed to complete the clamping, and the positioning hole 552 cooperates with the positioning post 548 for positioning. One cooling bridge 54, a plurality of power tubes 561 and one pressing member 55 form a power device module. A power device module is provided between two adjacent ones of the U-phase connecting piece, the V-phase connecting piece and the W-phase connecting piece.

[0065] Referring to Figure 14 and Figure 15 , the first cover 57 is located on the side close to the substrate 511. The first cover 57 is provided with a receiving groove. The substrate 511, the positive bus bar 512, the negative bus bar 513 and the welding points of the above-mentioned devices are all located in the receiving groove. The receiving groove is filled with potting glue, and the potting glue surrounds the welded fixed ends of the above-mentioned devices.

[0066] The second cover body 58 is located on the other side of the substrate 511 relative to the first cover body 57. The second cover body 58 has a substrate. Five first limiting grooves 581 are provided on the substrate of the second cover body 58, and a second limiting groove 584 is provided in the middle of the substrate. The first limiting grooves 581 and the second limiting groove 584 are arranged along the second transverse direction Y. The second limiting groove 584 is located between two middle first limiting grooves 581. The first limiting grooves 581 and the second limiting groove 584 extend along the first transverse direction X. When the second cover body 58 covers the free end of the device assembly, an electrode connecting piece 53 is located in a first limiting groove 581, and side walls 582 are respectively provided on both sides of the first limiting groove 581. The side walls 582 are located on both sides of the electrode connecting piece 53. A first clamping portion 532 is provided between the welding pins 531. The first clamping portion 532 is arranged in a groove shape. Second clamping portions 583 are provided on the two side walls 582. The second clamping portions 583 are arranged in a hook shape, and the two second clamping portions 583 are arranged oppositely. The second clamping portions 583 and the first clamping portion 532 are clamped together.

[0067] A power device module is located in a second limiting groove 584. Abuttment blocks 586 are respectively provided on the two side walls 582 of the second limiting groove 584. The abutment blocks 586 are located at the connection between the side wall 582 of the second limiting groove 584 and the bottom wall of the second limiting groove 584. A plurality of positioning ribs 587 are further provided on the abutment blocks 586. The plurality of positioning ribs 587 are arranged along the second transverse direction Y. The abutment blocks 586 abut against the pressing member, and the positioning ribs 587 are in limit fit in the groove body 554.

[0068] In addition, the cooling interface 542 of the cooling bridge 54 far from the connection end 533 is exposed outside the second cover body 58. At the cooling interface 542 of the cooling bridge 54 close to the connection end 533, the second cover body 58 is provided with a hollowed-out portion 585, and the cooling interface 542 is located at the hollowed-out portion 585.

[0069] Refer to Figures 16 to 20 , the motor includes a motor housing 21, a stator 201 and a rotor 202. The stator 201 and the rotor 202 are both arranged inside the motor housing 21. The rotor 202 rotates inside the stator 201. A housing seat 22 is provided at the other end of the motor housing 21 relative to the axial output end of the stator 201. A wire collecting cavity 221 is provided in the housing seat 22. The wire collecting cavity 221 is provided with an opening in the axial direction. A machine cover 23 covers the opening, so that the wire collecting cavity 221 is relatively airtight. A slot 224 is provided through the housing seat 22 in the radial direction. The slot 224 faces the motor control device 1 and is communicated with the wire collecting cavity 221. A signal slot is also provided through the housing seat 22 in the radial direction. The signal slot is used for mounting and cooperating with a signal connecting piece 63. A partition 225 is provided in the wire collecting cavity 221 of the housing seat 22. The partition 225 is located between the signal slot and the slot 224.

[0070] The connecting component 6 includes a connecting base 61 and an electrical connecting component. The electrical connecting component includes three single-phase connecting pieces 62 and a signal connecting piece 63. The three single-phase connecting pieces 62 and the signal connecting piece 63 all pass through the connecting base 61. The connecting base 61 and the electrical connecting component are connected by injection molding. The connecting base 61 is provided with a buckle 64 at the lower end. When the lower end of the connecting base 61 passes through the slot 224, the buckle 64 is engaged with the slot 224. The single-phase connecting piece 62 is provided with an electric control connecting end and a motor connecting end at both ends respectively. The electric control connecting end is arranged in a bent shape. And when the upper end of the connecting base 61 passes through the wiring hole 118, the electric control connecting ends of the three single-phase connecting pieces 62 are respectively connected to the connecting end 533 of an electrode connecting piece 53. And the electrode connecting piece 53 is a single-phase electrode piece. And the signal connecting piece 63 passes through the signal wiring hole 119 located on one side of the wiring hole 118.

[0071] The housing base 22 is provided with a wire collecting base 223 in the wire collecting cavity 221. The wire collecting base 223 is provided with three connecting nuts. The wire collecting base 223 is electrically connected to the winding of the stator 201. The motor connecting end is electrically connected to the wire collecting base 223, thus completing the connection between the electrode connecting piece 53 and the winding of the stator 201. At the same time, the partition plate 225 is located between the motor connecting end of the single-phase connecting piece 62 and the motor connecting end of the signal connecting piece 63. And the control signal or feedback signal of the motor is output to the motor control device through the connecting signal connecting piece 63.

[0072] The motor control device further includes a connecting bracket 64. The connecting bracket 64 and the three single-phase electrode pieces form a three-phase electrode connecting component. The connecting bracket 64 is arranged outside the wiring hole 118 and the signal wiring hole 119, and also surrounds the inner side of the side wall 102. The connecting bracket 64 is provided with three through holes. The connecting end 533 passes through the through holes. A ring groove 641 is arranged outside the three connecting ends 533. A magnetic ring (not shown) is arranged in the ring groove 641. The connecting bracket 64 is provided with a circuit board 642 on the side opposite to the ring groove 641. The circuit board 642 is also provided with three through holes. The connecting end 533 passes through the through holes. The circuit board 642 is provided with a mounting position 643 on the outer periphery of the connecting end 533. The mounting position 643 is used for mounting a Hall current sensor (not shown). The Hall current sensor is welded on the signal board 642. The single-phase electrode piece passes through the Hall current sensor, the circuit board 642 and the connecting bracket 64.

[0073] The control board 7 is disposed on the second housing 58, and the second housing 58 is located between the control board 7 and the circuit device. The control board 7 is fixedly connected to the connecting post 587 of the second housing 58. A control circuit and a control interface socket 71 are provided on the control board 7. The second housing 58 is provided with a first avoidance groove 588, and the control interface socket 71 is located in the first avoidance groove 588. Some other circuit components on the control board 7 are located on the other side relative to the second housing 58. The first housing 57 is provided with a second avoidance groove 571, and the positions of the first avoidance groove 588 and the second avoidance groove 571 correspond to each other. Then, based on the normal projection of the control board 7, the control interface socket 71 is respectively located outside the projections of the second housing 58 and the first housing 57, and the control interface socket 71 is located within the projection of the second avoidance groove 571.

[0074] The control housing 111 includes a first side wall 101, a second side wall 102, and a third side wall 103 arranged adjacent to each other. The first side wall 101 and the third side wall 103 are located on opposite sides. The control interface socket 71 is close to the first side wall 101. The motor control device is provided with a control wiring socket 72 at the first side wall 101. The control wiring socket 72 is close to the control interface socket 71 and is electrically connected to the control interface socket 71. The motor control device is provided with a signal connection socket near the second side wall 102. The signal connection socket is used for connecting a signal connecting member 63. The three single-phase electrode plates, the signal connection socket, and the signal board 642 are close to the second side wall 102. The motor signal connection socket is electrically connected to the control interface socket 71. The electrode wiring socket 4 and the capacitor module 3 are both located on the side close to the third side wall 103 and on the same side of the substrate 511. The current sensor is close to the third side wall 103, and the wiring hole 416 is close to the connection of the second side wall 102 and the third side wall 103. After the wiring end of the current sensor is installed in the wiring hole 416, the current sensor is electrically connected to the circuit board 642, and the circuit board 642 is connected to the control interface socket 71.

[0075] Vehicle embodiment:

[0076] The vehicle includes a drive assembly as described in the above solution. At the same time, the drive assembly can be integrated with a transmission or not integrated with a transmission. The vehicle can be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail transit vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0077] As can be seen from the above, the three mounting grooves provided by the connection frame are used for the mounting and positioning of capacitors, and cooperate with the connection of the electrode connection pieces on both sides, thereby realizing the parallel connection of the three capacitors, effectively increasing the capacitance, and realizing the stacked arrangement of capacitors by arranging them on the left and right sides and the bottom side, optimizing the layout structure to make the structure size more compact, which is conducive to further reducing the size of the device. Moreover, by loading the capacitor module into the housing, not only the modular arrangement of the capacitor module is realized, but also the seismic resistance and stability of the device are improved. By filling the housing with potting glue, not only the stable connection of the capacitor module is improved, but also the insulation and heat dissipation are enhanced by the potting glue. The multiple hollow holes can be used for heat conduction and also cooperate with the penetration of the potting glue, thereby improving the connection stability and efficient heat conduction. The positioning convex edge provides stable support and limit for the capacitor. The electrode connection piece and the connection frame are connected together by injection molding, which is not only stably connected but also convenient for the connection and assembly of the capacitor. From the cross-section, the capacitors in the first mounting groove and the second mounting groove are arranged longitudinally, while the capacitor in the third mounting groove below is arranged transversely. By cooperating with the arrangement of the avoidance groove, the capacitor module is arranged in a roughly "L" shape, effectively utilizing the horizontal space and reducing the longitudinal arrangement space.

[0078] In addition, a wiring cavity is formed by the wiring bottom wall and the wiring cavity wall, and the two electrode connection pieces pass through the wiring cavity wall, so that the wiring cavity has a relatively independent and sealed chamber. When the electrode wiring seat is installed in the housing of the motor control device, the wiring chamber for electrical connection is isolated from the chamber of the housing, thus avoiding external environment interference to the circuit devices in the housing during wiring, and improving the operation stability of the device. By using injection molding process, while ensuring the electrical connectivity of the electrode connection piece, the integrated seat body has a high isolation degree. By providing a trigger at the operation opening, after the corresponding cover is closed, the trigger can output a corresponding enabling signal to detect the correct closing of the cover, thus ensuring the operation stability of the device. The filter circuit module is arranged on the electrode wiring seat and outside the wiring cavity. Through the filter circuit module, the electrode connection piece can be filtered locally and nearby after connecting to the positive and negative power supplies, thereby further improving the performance of the device. The positioning posts can not only be used to connect with the housing of the motor control device, but also be used for the positioning and installation of the filter circuit module. By arranging magnetic rings on the outer periphery, electromagnetic interference is reduced. Magnetic rings can not only be arranged on the outer periphery of the seat body, but also a semi-circular groove can be provided at the bottom of the ring groove, and a current sensor can be arranged therein to detect the current of the input electrode. By using the stacked arrangement of the magnetic ring and the current sensor to optimize the space arrangement, the structural layout of the electrode wiring seat is more compact.

[0079] Furthermore, by arranging the cooling interface between two longitudinal end walls, the position of the cooling interface does not interfere with the longitudinal height arrangement of the cooling bridge. The installation holes, positioning holes and positioning columns facilitate the installation and stable connection of the cooling bridge on the housing of the motor control device. Since the cooling bridge needs to be adjacent to the power tube for heat conduction, the relative positions of the cooling bridge and the power tube need to be accurately maintained. The connecting piece is fixedly connected to the cooling bridge, and the connecting pins and the pins of the power tube are soldered to the substrate, thus achieving accurate relative fixation of the positions.

[0080] Moreover, by connecting the pressing part through the connecting part, multiple pressing parts can apply approximately the same clamping force to the pressed power tube. Therefore, even if the longitudinal dimension of the pressing part is reduced, the required pressure can still be maintained. The external expander can conveniently position the slot body and the connecting part, so that the pressing part is expanded outwards. Then, after being clamped to the corresponding position, it can be conveniently separated, thus achieving simple installation and stable and efficient operation. The connecting part near the free end of the pressing part is convenient for outward expansion, further improving the installation convenience. The abutting arc surface is used to abut against the surfaces of devices such as power tubes to avoid damage to the device packages. The pressing part can be installed and positioned through the positioning hole to maintain stable connection.

[0081] In addition, the first cover is covered on one side of the substrate, and potting glue is filled for sealing, fixing and heat conduction. Then, the second cover is covered on the free end of the device assembly to hold and fix the free end. The first limiting groove is used for clearance fit and limiting fixation of the sheet-shaped electrode connecting piece, and stable connection is achieved by cooperating with the clamping part. The second limiting groove is used for limiting and fixing the power device module, and the abutting block is used for adjacent cooperation with the pressing part to make the pressing part maintain a relatively good clamping force, thus improving the connection stability at the free end. The control board is arranged on the second cover, and with the dislocation design, the control interface seat is located outside the projection of the second cover. Therefore, the wiring of the control interface seat is not blocked by the second cover, thereby optimizing the wiring layout of the control circuit.

[0082] Furthermore, by providing a housing base at the rear axial end of the motor and arranging slots radially, with the motor control device located on the radial side of the motor, and a wiring hole provided in the bottom wall of the housing, a connecting seat body is passed through the slots and the wiring hole, enabling the electrical connection assembly to be connected between the three-phase electrode connection assembly and the stator electrical connection. Subsequently, the radial arrangement and radial wiring of the motor control device are achieved, thereby reducing the radial size of the drive assembly, effectively shrinking the occupied space, improving the space utilization rate, and realizing the high integration of the drive assembly. The wire collecting seat is used to connect the windings of the stator, and then the motor connection end can be conveniently connected to the wire collecting seat. The three single-phase connecting pieces are used to provide driving energy, and the signal connecting piece can monitor the operating state of the motor in real time, and the isolation degree can be improved through the partition to avoid signal interference. The buckle stably mounts the connecting seat body in the slots, and the tight fit between the connecting seat body and the electrical connection assembly is improved through the injection molding process, thereby enhancing the tightness of the connection structure. Electromagnetic interference is reduced through the arrangement of magnetic rings, and the Hall current sensor can monitor the output current in real time.

[0083] Moreover, by covering the first cover on one side of the substrate, and then covering the second cover on the free end of the device assembly, the free end is then held and fixed. The control board is arranged on the second cover, and with the misalignment design, the control interface seat is located outside the projection of the second cover. Therefore, the wiring of the control interface seat is not blocked by the second cover, thus optimizing the wiring layout of the control circuit. Through the design of two avoidance slots, the control interface seat is located outside the projections of both covers, optimizing the wiring layout and facilitating wiring. By arranging the control wiring seat, the motor signal connection seat, and the circuit board on three adjacent side walls close to each other respectively, and connecting them in sequence using the bridging connection method, the wiring arrangement is optimized to avoid long and redundant wiring.

Claims

1. Capacitance module, characterized in that: The capacitance module includes a housing cover and a capacitance module, and the capacitance module is arranged inside the housing cover; The capacitance module includes a plurality of capacitors, two electrode connection pieces and a connection frame; The connection frame is provided with a first installation groove and a second installation groove on both sides in the first transverse direction, and a third installation groove is arranged on the longitudinal side of the first installation groove and the second installation groove. The first installation groove, the second installation groove and the third installation groove are respectively provided with the capacitors; The two electrode connection pieces and the connection frame are connected by injection molding. The two electrode connection pieces are respectively located on both sides in the second transverse direction of the connection frame. The electrode connection piece is provided with a first connection end connected to the capacitor at the first installation groove, and the electrode connection piece is provided with a second connection end connected to the capacitor at the second installation groove. The electrode connection piece is provided with a third connection end connected to the capacitor at the third installation groove. The electrode connection piece is provided with a fourth connection end on the opposite side of the third installation groove in the longitudinal direction. The fourth connection end is welded to the substrate as a welding end. One of the electrode connection pieces is used as a positive electrode connection piece, and the other electrode connection piece is used as a negative electrode connection piece; The installation direction of the first installation groove is parallel to the installation direction of the second installation groove, and the installation direction of the first installation groove is perpendicular to the installation direction of the third installation groove; The outer wall of the housing cover is provided with an avoidance groove, and the avoidance groove is close to the positions of the second installation groove and the third installation groove; Viewed from the cross-section, the capacitors in the first installation groove and the second installation groove are arranged longitudinally, and the capacitor in the third installation groove is arranged transversely.

2. The capacitance module according to claim 1, characterized in that: The housing cover is filled with potting glue, and the potting glue wraps the capacitance module.

3. The capacitance module according to claim 1, characterized in that: The connection frame is provided with a plurality of hollow holes.

4. The capacitance module according to claim 1, characterized in that: The connection frame is respectively provided with positioning convex edges at the first installation groove, the second installation groove and the third installation groove, and the positioning convex edges are in limit fit with the capacitors.

5. Motor control device, characterized in that, Including the capacitance module according to any one of claims 1 to 4 above.

6. Drive assembly, characterized in that, Including the motor control device according to claim 5 above.

7. A vehicle, characterized in that, Including the drive assembly according to claim 6 above.

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