Electric assembly and vehicle provided with the same

Abstract

A vehicle provided with an electrical assembly and comprising a box body, an N-line connection assembly, a motor, an electric control module, and a DC connector. The box body comprises an electric control cavity. One end of the N-line connection assembly is suitable for being connected between two battery packs connected in series. The motor comprises a three-phase winding, and one end of the three-phase winding is a joining end, and the joining end is connected to the other end of the N-line connection assembly. The electric control module comprises an IGBT module, the IGBT module comprises a three-phase bridge arm, and the other end of the three-phase winding is connected to the midpoint of the three-phase bridge arm. The positive electrode of the DC connector is connected to the joining end, and the negative electrode of the DC connector is suitable for being connected to the IGBT module and to the negative electrode of the battery pack.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims the priority and benefit of Chinese Patent Application No. 202210994370.6, filed on August 18, 2022, with the China National Intellectual Property Administration and entitled "ELECTRIC ASSEMBLY AND VEHICLE WITH SAME", which is incorporated herein by reference in its entirety.

[0002] This disclosure relates to the field of vehicle technology, and more particularly, to an electric assembly and a vehicle provided with the same.

Background Art

[0003] In the prior art, the charge - discharge efficiency of a battery pack is low in a low - temperature state, and the electrical energy of the battery pack is not fully utilized. Therefore, in some electric assemblies, a positive temperature coefficient (PTC) heating member is used to heat the battery pack. However, the additional arrangement of the PTC heating member in the electric assembly leads to an increase in the number of components, as well as an increase in the cost and volume of the electric assembly.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This disclosure solves at least one of the technical problems in the prior art. Therefore, the object of this disclosure is to provide an electric assembly. In the electric assembly, self - heating of the battery pack may be implemented, and the three - phase windings of the motor and the bridge arms of the electric control module can also be reused in the self - heating circuit of the battery pack, which has advantages such as low cost, small volume, and few components.

[0005] This disclosure further provides a vehicle provided with the above - mentioned electric assembly.

Means for Solving the Problems

[0006] To achieve the above object, according to an embodiment of the first aspect of the present disclosure, an electric assembly is provided. The electric assembly includes a box, an N-line connection assembly, a motor, an electric control module, and a DC connector. The box includes an electric control cavity.

[0007] One end of the N-line connection assembly is adapted to be connected between two battery packs connected in series. The motor includes a three-phase winding. One end of the three-phase winding is a joint end, and the joint end is connected to the other end of the N-line connection assembly. The electric control module is mounted in the electric control cavity. The electric control module includes an IGBT module. The IGBT module includes a three-phase bridge arm, and the other ends of the three-phase windings are respectively connected to the midpoints of the three-phase bridge arms. The positive electrode of the DC connector is connected to the joint end, and the negative electrode of the DC connector is adapted to be connected to the IGBT module and to the negative electrode of the battery pack.

[0008] In the electric assembly according to this embodiment of the present disclosure, self-heating of the battery pack can be implemented, and the three-phase windings of the motor and the bridge arms of the electric control module are also reused in the self-heating circuit of the battery pack, which has advantages such as low cost, small volume, and few components.

[0009] According to some embodiments of the present disclosure, the electric assembly further includes a first capacitor. The first capacitor is mounted in the electric control cavity and is an X capacitor. One end of the first capacitor is connected to the positive electrode of the DC connector, and the other end of the first capacitor is connected to the negative electrode of the DC connector.

[0010] According to some embodiments of the present disclosure, the electrical assembly further includes a second capacitor and a second capacitor contactor. The second capacitor is mounted within an electrical control cavity and is an X capacitor. One end of the second capacitor is connected to one end of the first capacitor, and the other end of the second capacitor is connected to the positive electrode of the DC connector. The second capacitor contactor is mounted within the electrical control cavity. One end of the second capacitor contactor is connected to one end of the second capacitor, and the other end of the second capacitor contactor is connected to one end of the three-phase winding.

[0011] According to some embodiments of the present disclosure, the first capacitor is an X1 capacitor and the second capacitor is an X2 capacitor.

[0012] According to some embodiments of the present disclosure, the electrical assembly further includes a boost capacitor. The boost capacitor is mounted within the electrical control cavity. One end of the boost capacitor is connected to the negative electrode of the DC connector, and the other end of the boost capacitor is connected to the other end of the three-phase winding.

[0013] According to some embodiments of the present disclosure, the electrical assembly further includes a capacitor housing. The first capacitor, the second capacitor, and the boost capacitor are incorporated into the capacitor housing.

[0014] According to some embodiments of the present disclosure, the electrical assembly further includes a negative output copper bus bar. The negative output copper bus bar is mounted within the capacitor housing. The negative output copper bus bar is shared by the first capacitor and the second capacitor.

[0015] According to some embodiments of the present disclosure, several wiring harness fixing grooves are provided on the capacitor housing, and the several wiring harness fixing grooves are provided at least partially above the second capacitor.

[0016] According to some embodiments of the present disclosure, several cable tie holes are provided on the capacitor housing, and the cable tie holes are provided at least partially above the boost capacitor.

[0017] According to some embodiments of the present disclosure, the electrical assembly further includes a positive fuse and a negative fuse. The positive fuse is mounted in the electrical control cavity. One end of the positive fuse is connected to the positive electrode of the DC connector, and the other end of the positive fuse is connected to the upper bridge arm of each phase bridge arm. The negative fuse is mounted in the electrical control cavity and is disposed below the positive fuse. One end of the negative fuse is connected to the negative electrode of the DC connector, and the other end of the negative fuse is connected to the lower bridge arm of each phase bridge arm.

[0018] According to some embodiments of the present disclosure, the electrical assembly further includes a power supply module. The box further includes a power supply cavity. The power supply cavity is provided below the electrical control cavity, and the power supply module is disposed in the power supply cavity.

[0019] According to some embodiments of the present disclosure, a bracket is disposed in the box. The bracket divides the box into an upper electrical control cavity and a lower power supply cavity. Several shielding ribs extending facing the power supply cavity are disposed on the bracket. The shielding ribs form a shielding cavity. The shielding cavity is configured to mount a device forming the power supply module.

[0020] According to some embodiments of the present disclosure, the box further includes a bottom plate. The bottom plate is configured to close an opening below the power supply cavity.

[0021] According to some embodiments of the present disclosure, the motor includes a casing and an end cover. The three-phase winding is disposed within the casing. The end cover is disposed at one end of the casing and configured to close the casing. An opening for the N-line connection assembly to pass through is provided on the end cover.

[0022] According to some embodiments of the present disclosure, the N-line connection assembly includes an N-line, an N-line adapter, an N-line nose, and an N-line socket. One end of the N-line is connected to one end of the three-phase winding. One end of the N-line adapter is connected to one end of the N-line. The other end of the N-line adapter passes through the opening and is connected to one end of the N-line nose. One end of the N-line socket is connected to the other end of the N-line, and the other end of the N-line socket is connected to the N-line copper busbar of the electric control module. The N-line copper busbar passes through the Hall. The Hall is connected to the electric control module through a signal cable.

[0023] According to some embodiments of the present disclosure, an insertion groove is provided at one end of the casing close to the end cover. The insertion groove is provided in proximity to the electric control cavity. The N-line socket is inserted into the insertion groove and fixedly connected to the casing.

[0024] According to some embodiments of the present disclosure, the electric assembly further includes a liquid channel cover plate. A first liquid channel is provided on the liquid channel cover plate. A second liquid channel and a third liquid channel are provided in the electric control cavity. The liquid channel cover plate is connected to the box and closes the second liquid channel and the third liquid channel. The first liquid channel communicates with the second liquid channel and the third liquid channel. The second liquid channel is adapted to communicate with the liquid inlet pipe, and the third liquid channel is adapted to communicate with the liquid outlet pipe. The refrigerant in the second liquid channel flows into the first liquid channel to dissipate heat to the IGBT module, and the refrigerant in the first liquid channel flows into the third liquid channel to dissipate heat to the power supply module.

[0025] According to some embodiments of the present disclosure, the electrical assembly further includes a sealing ring. A sealing groove surrounding the first liquid channel is provided on the liquid channel cover plate. The sealing ring is disposed within the sealing groove. The IGBT module compresses the sealing ring, and the sealing ring fills the gap between the liquid channel cover plate and the IGBT module.

[0026] According to some embodiments of the present disclosure, the third liquid channel includes a transition section and an annular section. One end of the transition section communicates with the first liquid channel. The annular section surrounds the power supply module and dissipates heat to the power supply module. One end of the annular section is connected to the other end of the transition section, and a liquid outlet hole is provided at the other end of the annular section. The depth of the annular section exceeds the depth of the second liquid channel and the depth of the transition section.

[0027] According to some embodiments of the present disclosure, the power supply module includes a power supply distribution board. The power supply distribution board is mounted within a power supply cavity. A number of devices are mounted on the power supply distribution board. The number of devices includes a transformer, a transformer inductor, a number of MOS transistors, an AC inductor, and a DC inductor. The transformer and the transformer inductor are spaced apart. The number of MOS transistors are respectively disposed on two opposite sides of the transformer and the transformer inductor. The AC inductor and the DC inductor are respectively disposed on two opposite sides of the transformer and the transformer inductor. The third liquid channel surrounds the transformer and the transformer inductor, and the number of MOS transistors are installed on two opposite sides of the third liquid channel to exchange heat with the third liquid channel.

[0028] According to some embodiments of the present disclosure, the power supply cavity is provided with several MOS transistor cavities, an AC inductor cavity, and a DC inductor cavity. The AC inductor extends within the AC inductor cavity. The DC inductor extends within the DC inductor cavity. Several MOS transistors extend within several MOS transistor cavities in a one-to-one correspondence.

[0029] According to some embodiments of the present disclosure, the electric control module includes a control panel and a drive panel. The drive panel is disposed below the control panel. The IGBT module is disposed on the drive panel and is also connected to the control panel. The electric assembly further includes a shielding plate. The shielding plate is disposed between the drive panel and the control panel.

[0030] According to an embodiment of the second aspect of the present disclosure, a vehicle is provided. The vehicle includes the electric assembly according to the embodiment of the first aspect of the present disclosure.

[0031] In the vehicle according to this embodiment of the second aspect of the present disclosure, the electric assembly according to the embodiment of the first aspect of the present disclosure is used, and as a result, self-heating of the battery pack can be implemented, and the three-phase windings of the motor and the bridge arms of the electric control module are also reused in the self-heating circuit of the battery pack, which has advantages such as low cost, small volume, and few components.

[0032] Further aspects and advantages of the present disclosure are provided in the following description, some of which will be apparent from the following description or can be learned from the practice of the present disclosure.

[0033] The above and / or further aspects and advantages of the present disclosure will become apparent and understandable in the description of the embodiments made with reference to the following drawings.

Brief Description of the Drawings

[0034]

Figure 1

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Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0035] Embodiments of the present disclosure will be described in detail below with reference to the exemplary embodiments in the accompanying drawings.

[0036] In the description of the present disclosure, the orientation or positional relationship indicated by terms such as "center", "longitudinal direction", "lateral direction", "length", "width", "thickness", "above", "below", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", and "circumferential direction" is based on the orientation or positional relationship shown in the drawings, and does not indicate or imply that the device or component mentioned necessarily has a specific orientation or is necessarily configured and operated in a specific orientation. It should be understood that such terms are used only for the ease and brevity of the exemplification and explanation of the present disclosure. Therefore, such terms should not be construed as a limitation to the present disclosure.

[0037] In the description of the present disclosure, "a plurality of / a number of" means two or more than three.

[0038] The electrical assembly 1 according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0039] As shown in FIGS. 1 to 12 (in the figures, arrow A indicates the first direction and arrow B indicates the second direction), the electrical assembly 1 according to this embodiment of the present disclosure includes a box 100, an N-line connection assembly 250, a motor 200, an electrical control module 300, and a DC connector 400.

[0040] The box 100 includes an electric control cavity 110. The motor 200 includes a three-phase winding 210. One end 2101 of the three-phase winding 210 is a joint end, and the joint end is connected to the N-line connection assembly 250. One end 2501 of the N-line connection assembly 250 is adapted to be connected between two battery packs 2 connected in series. The electric control module 300 is mounted in the electric control cavity 110. The electric control module 300 includes an IGBT module 340. For example, the electric control module 300 includes a drive board 310 and a control board 320. The drive board 310 is disposed below the control board 320. Optionally, a shielding plate 330 is further disposed between the drive board 310 and the control board 320. Optionally, the IGBT module 340 is disposed on the drive board 310, and the IGBT module 340 is connected to the control board 320. The IGBT module 340 includes a three-phase bridge arm 350. The other ends 2102 of the three-phase winding 210 are respectively connected to the midpoints of the three-phase bridge arm 350. The positive electrode 4001 of the DC connector 400 is connected to the joint end. For example, the positive electrode 4001 of the DC connector 400 is connected to the three-phase upper bridge arm 351. The negative electrode 4002 of the DC connector 400 is connected to the IGBT module 340 and is adapted to be connected to the negative electrode of the battery pack 2. For example, the negative electrode 4002 of the DC connector 400 is connected to the three-phase lower bridge arm 352.

[0041] It should be noted that the other ends 2102 of the three-phase winding 210 are respectively connected to the midpoints of the three-phase bridge arm 350, which does not mean that the other ends 2102 of the three-phase winding 210 are respectively connected to the intermediate positions of the three-phase bridge arm 350, but includes that the other ends 2101 of the three-phase winding 210 are respectively connected between the upper bridge arm 351 and the lower bridge arm 352 of the three-phase bridge arm 350.

[0042] In the electric assembly 1 according to this embodiment of the present disclosure, the electric control module 300 is mounted in the electric control cavity 110. The electric control module 300 includes a drive board 310 and a control board 320. The drive board 310 is disposed below the control board 320, and a shielding board 330 is further disposed between the drive board 310 and the control board 320. In this way, the shielding board 330 attenuates the electromagnetic interference of the drive board 310 on the control board 320, thereby avoiding fluctuations in the control signals of the control board 320 and improving the reliability of the control signals of the control board 320.

[0043] According to some embodiments of the present disclosure, the IGBT module 340 is disposed on the drive board 310. The IGBT module 340 includes a three-phase bridge arm 350, and the IGBT module 340 is connected to the control board 320. For example, each phase bridge arm 350 includes an upper bridge arm 351 and a lower bridge arm 352. The three-phase upper bridge arms 351 are attached and then connected to the first control interface of the control board 320, and the three-phase lower bridge arms 352 are attached and then connected to the second control interface of the control board 320.

[0044] Since the three-phase upper bridge arm 351 is controlled by an electrical signal transmitted from the first control interface, the three-phase upper bridge arm 351 is turned on simultaneously or turned off simultaneously. Since the three-phase lower bridge arm 352 is controlled by an electrical signal transmitted from the second control interface, the three-phase lower bridge arm 352 is turned on simultaneously or turned off simultaneously. In addition, the state of the three-phase upper bridge arm 351 can continue to be opposite to the state of the three-phase lower bridge arm 352, that is, the electrical signal of the first control interface may be opposite to the electrical signal of the second control interface.

[0045] In other words, the motor 200 is a three-phase motor, and the motor 200 may also be a drive motor or a generator. The three-phase winding 210 is used in the electric assembly 1, and the three-phase winding 210 is connected to the three-phase bridge arm 350 in a one-to-one correspondence so that the possibility of generating a ripple current in the circuit of the electric assembly 1 can be reduced, thereby ensuring the stability of the heating voltage and the charging voltage of the battery pack 2 and improving the quality of the electrical energy.

[0046] In addition, one end 2101 of the three-phase winding 210 is a joint end, and the joint end is connected to the N-line connection assembly 250. One end 2501 of the N-line connection assembly 250 is adapted to be connected between two battery packs 2 connected in series. The other ends 2102 of the three-phase winding 210 are respectively connected to the midpoints of the three-phase bridge arms 350. The positive electrode 4001 of the DC connector 400 is connected to the three-phase upper bridge arm 351, and the negative electrode 4002 of the DC connector 400 is connected to the three-phase lower bridge arm 352. The positive electrode 4001 of the DC connector 400 is connected to the positive electrodes of two battery packs 2 connected in series, and the negative electrode 4002 of the DC connector 400 is connected to the negative electrodes of two battery packs 2 connected in series.

[0047] For example, in the positive half cycle of the fundamental wave period, when the upper bridge arm 351 is turned on and the lower bridge arm 352 is turned off, one of the two battery packs 2 discharges, and a loop is formed through the IGBT of the upper bridge arm 351. The current of one of the two battery packs 2 flows through the upper bridge arm 351 and charges the three-phase winding 210. When the lower bridge arm 352 is turned on and the upper bridge arm 351 is turned off, the three-phase winding 210 rotates inertially and charges the other of the two battery packs 2, and then a loop is formed through the diode of the lower bridge arm 352.

[0048] In the negative half cycle of the fundamental wave period, when the lower bridge arm 352 is turned on and the upper bridge arm 351 is turned off, the other of the two battery packs 2 discharges to the three-phase winding 210, a loop is formed through the IGBT of the lower bridge arm 352, and the current of the other of the two battery packs 2 flows through the lower bridge arm 352 to charge the three-phase winding 210. When the upper bridge arm 351 is turned on and the lower bridge arm 352 is turned off, the three-phase winding 210 rotates inertially to charge one of the two battery packs 2, and then a loop is formed through the diode of the upper bridge arm 351.

[0049] The upper bridge arm 351 and the lower bridge arm 352 are controlled to operate at a high on / off frequency, and the two battery packs 2 charge and discharge each other through current oscillation so that the internal resistances of the two battery packs 2 generate heat, thereby implementing self-heating of the battery packs 2. The current amount between the junction of the three-phase winding 210 and the battery pack 2 may be monitored by a hall.

[0050] In this way, in a low-temperature environment, the battery pack 2 can perform self-heating so that the power supply efficiency of the battery pack 2 can be improved. For example, during the movement of the vehicle, the battery pack 2 can perform self-heating so that the battery pack 2 is maintained in an operating state where electricity is supplied with high efficiency. In addition, when the battery pack 2 is charged, the battery pack 2 can improve the charging efficiency by first performing self-heating. It is not necessary to additionally arrange a PTC heating member in the electric assembly 1, which reduces costs, reduces volume, and reduces the number of components. In addition, compared with an electric assembly that heats a battery pack by using a PTC heating member, the electric assembly 1 in the present disclosure consumes less electricity for the battery pack 2, thereby assisting in improving the service life of the vehicle.

[0051] In addition, the three-phase winding 210 of the motor 200 and the bridge arm 350 of the electric control module 300 are reused in the self-heating circuit of the battery pack 2. As a result, the utilization of the components of the electric assembly 1 is improved and the number of components is reduced. In this way, the volume of the electric assembly 1 becomes smaller and the cost becomes lower.

[0052] In this way, in the electric assembly 1 according to this embodiment of the present disclosure, self-heating of the battery pack 2 can be implemented, and the three-phase winding 210 of the motor 200 and the bridge arm 350 of the electric control module 300 are also reused in the self-heating circuit of the battery pack 2, which has advantages such as low cost, small volume, and a small number of components.

[0053] According to some specific embodiments of the present disclosure, as shown in FIGS. 11 and 12, the electric assembly 1 further includes a first capacitor 500. The first capacitor 500 is mounted in the electric control cavity 110 and is an X capacitor. The first capacitor 500 is installed between the DC connector 400 and the electric control module 300 in a first direction. The electric control module 300 extends in a second direction. The first direction is perpendicular to the second direction. One end 5001 of the first capacitor 500 is connected to the positive electrode 4001 of the DC connector 400, and the other end 5002 of the first capacitor 500 is connected to the negative electrode 4002 of the DC connector 400.

[0054] When the battery pack 2 supplies electricity to the bridge arm 350 of the electric control module, the current of the battery pack 2 flows through the DC connector 400 and the first capacitor 500. The first capacitor 500 absorbs the ripple current output by the battery pack 2 and filters the output current of the battery pack 2 to ensure the stability of the voltage for supplying electricity to the bridge arm 350.

[0055] When the battery pack 2 is charged, the current input to the battery pack 2 first flows through the first capacitor 500, and the first capacitor 500 can absorb the ripple current in the current input to the battery pack 2. As a result, the charging voltage of the current flowing into the battery pack 2 stabilizes.

[0056] In this way, the overall distance from the first capacitor 500 to the DC connector 400 and the electric control module 300 is shorter, the first capacitor 500, the DC connector 400, and the electric control module 300 are more compact, the connection between the first capacitor 500, the DC connector 400, and the electric control module 300 is simpler, the wiring distance is shorter, and the reliability of the electrical connection is higher. In this way, the integration of the electric assembly 1 is improved, the volume of the electric control cavity 110 can be made smaller, and the volume of the electric assembly 1 is also reduced.

[0057] According to some specific embodiments of the present disclosure, as shown in FIGS. 11 and 12, the electric assembly 1 further includes a second capacitor 600 and a second capacitor contactor 610.

[0058] The second capacitor 600 is mounted within the electric control cavity 110 and is an X capacitor. The second capacitor 600 is installed between the DC connector 400 and the electric control module 300 in the first direction, and the second capacitor 600 is installed above the first capacitor 500. One end 6001 of the second capacitor 600 is connected to one end 5001 of the first capacitor 500, and the other end 6002 of the second capacitor 600 is connected to the positive electrode 4001 of the DC connector 400. The second capacitor contactor 610 is mounted within the electric control cavity 110. The second capacitor contactor 610 is installed between the inner wall of the electric control cavity 110 and the electric control module 300 in the second direction. The second capacitor contactor 610 is adjacent to the side of the electric control module 300 facing the second capacitor 600 in the first direction. One end 6101 of the second capacitor contactor 610 is connected to one end 6001 of the second capacitor 600, and the other end 6102 of the second capacitor contactor 610 is connected to one end 2101 of the three-phase winding 210.

[0059] In other words, the first capacitor 500 and the second capacitor 600 are connected in series, and the first capacitor 500 and the second capacitor 600 connected in series are connected to the positive electrode 4001 and the negative electrode 4002 of the DC connector 400. The first capacitor 500 and the second capacitor 600 can absorb the ripple current together to achieve the stability of the output voltage of the battery pack 2 and the charging voltage input to the battery pack 2. In addition, the second capacitor 600 can be used to eliminate differential mode interference.

[0060] The second capacitor contactor 610 is arranged so that whether the second capacitor 600 communicates with the joint end of the three-phase winding 210 can be controlled. When the battery pack 2 is boosted, charged, or self-heated, the second capacitor contactor 610 can be made conductive so that the second capacitor 600 communicates with the joint end of the three-phase winding 210. In this way, the second capacitor 600 can absorb the differential mode current between the joint end of the three-phase winding 210 and the battery pack 2 in order to reduce the high-frequency differential mode current component between the positive and negative electrodes of the DC connector 400 and, moreover, to reduce the risk of high-frequency current saturation of the magnetic ring at a specific frequency as much as possible.

[0061] In this way, the overall distance from the second capacitor 600 to the second capacitor contactor 610, the first capacitor 500, the DC connector 400, and the electric control module 300 is shorter, the second capacitor 600, the second capacitor contactor 610, the first capacitor 500, the DC connector 400, and the electric control module 300 are more compact, the connection between the second capacitor 600, the second capacitor contactor 610, the first capacitor 500, the DC connector 400, and the electric control module 300 is simpler, the wiring distance is shorter, and the reliability of the electrical connection is higher. In this way, the integration of the electric assembly 1 is improved, the volume of the electric control cavity 110 can be smaller, and the volume of the electric assembly 1 is also reduced.

[0062] According to some specific embodiments of the present disclosure, the first capacitor 500 is an X1 capacitor, and the second capacitor 600 is an X2 capacitor. The high voltage resistance of the first capacitor 500 ranges from 2.5 KV to 4 KV, and the high voltage resistance of the second capacitor 600 does not exceed 2.5 KV.

[0063] The first capacitor 500 is a capacitor having a voltage stabilization and filtering function when the battery pack 2 supplies electricity to the IGBT of the bridge arm 350 of the electric control module. During the movement of the vehicle, the IGBT has a high output when converting current. Therefore, the high voltage resistance range of the first capacitor 500 needs to be larger.

[0064] The second capacitor 600 is configured to absorb the differential mode current on the N line 252 when the battery pack 2 performs self-heating. It can be learned from FIGS. 1 to 11 that the second capacitor 600 is connected to the N line 252 through the second capacitor contactor 610. When the battery pack 2 performs self-heating, the N line 252 conducts. Since the power of the battery pack 2 for self-heating is not higher than the power of the IGBT when the IGBT converts current during the movement of the vehicle, the high voltage resistance range of the second capacitor 600 may be narrower than that of the first capacitor 500.

[0065] According to some specific embodiments of the present disclosure, as shown in FIG. 4, the electric assembly 1 further includes a negative output copper busbar 510. The negative output copper busbar 510 is shared by the first capacitor 500 and the second capacitor 600. In this way, there is no need to additionally arrange the negative output copper busbar 510 separately for the first capacitor 500 or the second capacitor 600, which reduces the number of components, reduces the production cost, and thereby helps to reduce the volume of the electric assembly 1.

[0066] The negative copper busbar of the first capacitor 500 may be connected to the negative copper busbar of the DC bus, and the positive copper busbar of the second capacitor 600 may be connected to the positive copper busbar of the DC bus.

[0067] According to some specific embodiments of the present disclosure, as shown in FIGS. 3, 4, 11, and 12, the electrical assembly 1 further includes a boost capacitor 700. The boost capacitor 700 is mounted within the electrical control cavity 110. The boost capacitor 700 is installed on the side of the first capacitor 500 facing the opposite side of the second capacitor contactor 610 in the second direction. One end 7001 of the boost capacitor 700 is connected to the negative electrode 4002 of the DC connector 400, and the other end 7002 of the boost capacitor 700 is connected to the other end 2102 of the three-phase winding 210. In other words, the two ends of the boost capacitor 700 are respectively connected to the positive electrode and the negative electrode of a charging device (for example, a charging pile or a charging cabinet) for charging the battery pack 2.

[0068] The first capacitor 500, the second capacitor 600, and the three-phase winding 210 form an L / C circuit. The boost capacitor 700 can absorb the ripple current and filter the input current of the charging device in order to stabilize the voltage input from the charging device to the electrical assembly 1.

[0069] According to some specific embodiments of the present disclosure, as shown in FIG. 4, the electrical assembly 1 further includes a capacitor housing 3. The first capacitor 500, the second capacitor 600, and the boost capacitor 700 are incorporated into the capacitor housing 3.

[0070] In this way, the boost capacitor 700, the second capacitor 600, and the first capacitor 500 are closer to each other, and the boost capacitor 700, the second capacitor 600, and the first capacitor 500 can be disassembled and assembled simultaneously. As a result, the disassembly process and the assembly process are simplified. In addition, the integration of the electrical assembly 1 is improved, the volume of the electrical control cavity 110 can be smaller, and the volume of the electrical assembly 1 is also reduced.

[0071] In addition, the negative output copper busbar 510 and the heat dissipation device can be shared by the first capacitor 500 and the second capacitor 600, thereby facilitating heat dissipation and the connection of the wiring harness, and saving space and cost.

[0072] According to some specific embodiments of the present disclosure, as shown in FIG. 4, several wire harness fixing grooves 910 are provided on the capacitor housing 3, and the several wire harness fixing grooves 910 are provided at least partially above the second capacitor 600. In other words, several wire harness fixing grooves 910 can be provided above the second capacitor 600. The wire harness connected to the second capacitor 600 can be drawn out from the second capacitor 600 and then pass through the wire harness fixing groove 910. The wire harness fixing groove 910 can fix a part of the wire harness, and as a result, the wire harness connected to the second capacitor 600 is more orderly, and the positional interference between the wire harness and other components is avoided, thereby further facilitating the overall layout of the electrical assembly 1.

[0073] According to some specific embodiments of the present disclosure, as shown in FIG. 4, several cable tie holes 920 are provided on the capacitor housing 3, and the cable tie holes 920 are provided at least partially above the boost capacitor 700. In other words, several cable tie holes 920 can be provided above the boost capacitor 700. The wire harness connected to the boost capacitor 700 can be drawn out from the boost capacitor 700 and then fixed by a cable tie passing through the cable tie hole 920. The cable tie passing through the cable tie hole 920 can fix a part of the wire harness, and as a result, the wire harness connected to the boost capacitor 700 can be more orderly, and the positional interference between the wire harness and other components is avoided, thereby further facilitating the overall layout of the electrical assembly 1.

[0074] According to some specific embodiments of the present disclosure, as shown in FIGS. 3, 11, and 12, the electrical assembly 1 further includes a positive fuse 410 and a negative fuse 420.

[0075] The positive fuse 410 is mounted within the electrical control cavity 110 and is installed between the first capacitor 500 and the DC connector 400 in a first direction. One end 4101 of the positive fuse 410 is connected to the positive electrode 4001 of the DC connector 400, and the other end 4102 of the positive fuse 410 is connected to the upper bridge arm 351 of each phase bridge arm 350. The positive fuse 410 is arranged so that no short circuit occurs between a part of the reverse current of the battery pack 2 and the current on the positive electrode of the battery pack 2 during the self-heating process, thereby improving the safety of the electrical connection of the electrical assembly 1.

[0076] The negative fuse 420 is mounted within the electrical control cavity 110 and is installed between the first capacitor 500 and the DC connector 400 in a first direction. The negative fuse 420 is installed below the positive fuse 410. One end 4201 of the negative fuse 420 is connected to the negative electrode 4002 of the DC connector 400, and the other end 4202 of the negative fuse 420 is connected to the lower bridge arm 352 of each phase bridge arm 350. The negative fuse 420 is arranged so that the driving current of the battery pack 2 to the bridge arm 350 does not become excessively large, thereby driving the fuse.

[0077] For example, the positive fuse 410 and the negative fuse 420 can be mounted on the capacitor housing 3 such that the layout between the positive fuse 410 and the negative fuse 420 is more hierarchical, the volume of the electrical control cavity 110 does not increase in the first and second directions, that is, the cross-sectional area of the electrical control cavity 110 is not affected, and the arrangement of the components in the electrical control cavity 110 is more compact. In this way, the integration of the electrical assembly 1 is improved, and the volume of the electrical control cavity 110 can be smaller.

[0078] According to some specific embodiments of the present disclosure, as shown in FIGS. 6 to 8, the electric assembly 1 further includes a power supply module 800. The box 100 further includes a power supply cavity 190. The power supply cavity 190 is provided below the electric control cavity 110, and the power supply module 800 is disposed within the power supply cavity 190. The control panel 320 may be connected to and communicate with the vehicle control device and the power supply module 800. The control panel 320 outputs a control signal according to the electrical signal of the vehicle control device to control the drive panel 310 and the power supply module 800.

[0079] In other words, the power supply cavity 190 and the electric control cavity 110 are respectively disposed on two opposite sides of the box 100 in the thickness direction so that the power supply module 800 is less likely to interfere with the electric control module 300 in the electric control cavity 110. In addition, the power supply cavity 190 is provided below the electric control cavity 110, and the power supply module 800 is installed on the side of the IGBT module 340 facing away from the control panel 320. In this way, the power supply module 800 is further away from the control panel 320, and the power supply module 800 and the control panel 320 are spaced apart by the shielding plate 330. As a result, the electromagnetic interference of the power supply module 800 on the control panel 320 can be further reduced, and the control of the electric assembly 1 becomes more reliable and stable.

[0080] According to some specific embodiments of the present disclosure, as shown in FIG. 8, a bracket 101 is disposed within the box 100. The bracket 101 divides the box 100 into an electric control cavity 110 installed at the upper part and a power supply cavity 190 installed at the lower part. A plurality of shielding ribs 102 extending facing the power supply cavity 190 are disposed on the bracket 101. The shielding ribs 102 form a shielding cavity 103. The shielding cavity 103 is configured to mount a device forming the power supply module 800.

[0081] Therefore, the bracket 101 can isolate the electrical control cavity 110 from the power supply cavity 190, and can incorporate the electrical control cavity 110 and the power supply cavity 190 into the same box 100 for a higher degree of integration. In addition, the bracket 101 can prevent interference between the components in the electrical control cavity 110 and the components in the power supply cavity 190.

[0082] In addition, some shielding ribs 102 may be arranged, and the some shielding ribs 102 can divide the power supply cavity 190 into some shielding cavities 103. In this way, the some shielding cavities 103 can separately accommodate the devices forming the power supply module 800, prevent electromagnetic interference between the some devices forming the power supply module 800, and thereby ensure the normal operation of the power supply module 800. In addition, the shielding cavities 103 can also be configured to fix the devices in the power supply module 800 to improve the mounting stability of the power supply module 800.

[0083] According to some specific embodiments of the present disclosure, as shown in FIGS. 6 and 8, the box 100 further includes a bottom plate 810. The bottom plate 810 is configured to block the opening below the power supply cavity 190. In this way, the bottom plate 810 can block the power supply cavity 190 such that the power supply module 800 is fixed between the power supply cavity 190 and the bottom plate 810, the airtightness of the power supply cavity 190 is further improved, and the fixing of the bottom plate 810 for the power supply module 800 is more reliable. In addition, the bottom plate 810 can also shield the interference between the power supply module 190 and the outside by having a shielding function.

[0084] According to some specific embodiments of the present disclosure, as shown in FIG. 2, the motor 200 includes a casing 230 and an end cover 240.

[0085] The three-phase winding 210 is disposed within the casing 230. The end cover 240 is disposed at one end of the casing 230 and configured to close the casing 230. An opening 260 for the N-line connection assembly 250 to pass through is provided on the end cover 240. The N-line nose 220 is connected to one end 2101 of the three-phase winding 210 through the N-line connection assembly 250.

[0086] In this way, the N-line connection assembly 250 can extend outside the opening 260 and be connected to the N-line nose 220. The conductive structure connecting the joined ends of the three-phase winding 210 and the battery pack 2 does not need to pass through the box 100. The wiring path between the joined ends of the three-phase winding 210 and the battery pack 2 is shorter. The joined ends of the three-phase winding 210 and the battery pack 2 can conduct electricity through the connection wires of the N-line nose 220. As a result, the conductive structure between the joined ends of the three-phase winding 210 and the battery pack 2 becomes simpler.

[0087] In addition, the N-line connection assembly 250 can extend outside the opening 260 and be connected to the battery pack 2 through the N-line nose 220. Therefore, the N-line connection assembly 250 does not need to extend into the box 100. As a result, the volume of the box 100 can be reduced. In addition, the N-line connection assembly 250 does not interfere with the electrical control module 300 within the box 100, thereby facilitating the layout within the box 100.

[0088] According to some specific embodiments of the present disclosure, as shown in FIG. 2, the N-line connection assembly 250 includes an N-line adapter 251, an N-line 252, an N-line socket 253, and an N-line nose 220.

[0089] One end of the N wire 252 is connected to one end 2101 of the three-phase winding 210. One end of the N wire adapter 251 is connected to one end of the N wire 252. The other end of the N wire adapter 251 passes through the opening 260 and is connected to one end of the N wire nose 220. One end of the N wire socket 253 is connected to the other end of the N wire 252, and the other end of the N wire socket 253 extends into the box 100 and is connected to the N wire copper busbar 3001 of the electric control module 300. The N wire copper busbar 3001 passes through the hole 3002. The hole 3002 is connected to the electric control module 300 through a signal cable.

[0090] The N wire adapter 251 is arranged to facilitate the connection between the joined end of the three-phase winding 210 and the N wire nose 220, and the N wire 252 and the N wire socket 253 are arranged to implement the connection between the three-phase winding 210 and the vehicle charging base. In this way, when the charging base is connected to a charging box having a low charging voltage (for example, the charging voltage is 450V), the charging current is led to the three-phase winding 210 and the bridge arm 350 through the N wire 252 and the N wire socket 253, and can flow to the battery pack 2 through the bridge arm 350, thereby implementing boost charging of the battery pack 2.

[0091] According to some specific embodiments of the present disclosure, as shown in FIG. 2, an insertion groove 270 is provided at one end of the casing 230 close to the end cover 240. The insertion groove 270 is provided in proximity to the electric control cavity 110. The N wire socket 253 is inserted into the insertion groove 270 and fixedly connected to the casing 230. In this way, the N wire socket 253 is fixed to the casing 230, and the N wire socket 253 is closer to the other end of the N wire 252, and the N wire copper busbar 3001 of the electric control module 300 is closer, and as a result, the volume of the N wire socket 253 can be made smaller.

[0092] According to some specific embodiments of the present disclosure, as shown in FIGS. 4 and 8 to 10, the electrical assembly 1 further includes a liquid channel cover plate 120. A first liquid channel 130 is provided in the liquid channel cover plate 120. A second liquid channel 140 and a third liquid channel 150 are provided in the electrical control cavity 110. The liquid channel cover plate 120 is connected to the box 100 and closes the second liquid channel 140 and the third liquid channel 150. The liquid channel cover plate 120 may be integrally connected to the box 100 by friction welding.

[0093] The first liquid channel 130 communicates with the second liquid channel 140 and the third liquid channel 150. The second liquid channel 140 is adapted to communicate with the liquid inlet pipe 160, and the third liquid channel 150 is adapted to communicate with the liquid outlet pipe 170. The refrigerant in the second liquid channel 140 flows into the first liquid channel 130 to dissipate heat to the IGBT module 340, and the refrigerant in the first liquid channel 130 flows into the third liquid channel 150 to dissipate heat to the power supply module 800.

[0094] In other words, the first liquid channel 130, the second liquid channel 140, and the third liquid channel 150 form a communicating liquid channel, and the refrigerant in the first liquid channel 130, the second liquid channel 140, and the third liquid channel 150 can be shared. The IGBT module can avoid leakage of the refrigerant in the first liquid channel 130 by sealing the first liquid channel 130. In addition, the refrigerant in the first liquid channel 130 can cool the IGBT module 340 so that the IGBT module 340 is in a low-temperature state or a normal-temperature state, and avoid damage to the IGBT module 340 at high temperature, thereby maintaining the operating stability of the IGBT module.

[0095] In addition, the liquid channel cover plate 120 can avoid the leakage of the refrigerant in the second liquid channel 140 and the third liquid channel 150 by sealing the second liquid channel 140 and the third liquid channel 150. In addition, the refrigerant in the third liquid channel 150 can exchange heat with the power supply module 800 through the outer wall of the third liquid channel 150. As a result, the temperature of the power supply module 800 can be reduced, and the power supply module 800 can be maintained in a low-temperature state or a normal-temperature state, thereby improving the operating stability of the power supply module 800 and avoiding damage to the power supply module 800 at high temperatures.

[0096] In addition, the first liquid channel 130, the second liquid channel 140, and the third liquid channel 150 communicate with each other so that the flow path of the refrigerant becomes longer. The refrigerant in the second liquid channel 140 can flow into the first liquid channel 130 and dissipate heat to the IGBT module 340. The refrigerant in the first liquid channel 130 can flow into the third liquid channel 150 and dissipate heat to the power supply module 800. As a result, the utilization of the refrigerant can be improved, and the refrigerant can sufficiently exchange heat with the power supply module 800 and the IGBT module 340.

[0097] According to some specific embodiments of the present disclosure, as shown in FIGS. 9 and 10, the electric assembly 1 further includes a sealing ring 180. A sealing groove surrounding the first liquid channel 130 is provided on the liquid channel cover plate 120. The sealing ring 180 is disposed in the sealing groove. The IGBT module 340 presses the sealing ring 180, and the sealing ring 180 fills the gap between the liquid channel cover plate 120 and the IGBT module.

[0098] In this way, the IGBT module 340 can better seal the first liquid channel 130, thereby further improving the sealing performance of the first liquid channel 130 and more effectively avoiding the leakage of the refrigerant in the first liquid channel 130.

[0099] According to some specific embodiments of the present disclosure, as shown in FIG. 4, the third liquid channel 150 includes a transition section 151 and an annular section 152. One end of the transition section 151 communicates with the first liquid channel 130. The annular section 152 surrounds the power supply module 800 and dissipates heat to the power supply module 800. One end of the annular section 152 is connected to the other end of the transition section 151, and a liquid outlet hole 1521 is provided at the other end of the annular section 152. The depth of the annular section 152 exceeds the depth of the second liquid channel 140 and the depth of the transition section 151.

[0100] For example, the refrigerant first flows into the second liquid channel 140, then into the first liquid channel 130. Then, the refrigerant in the first liquid channel 130 flows into the transition section 151 and finally flows from the transition section 151 into the annular section 152 and is discharged from the liquid outlet hole 1521 of the annular section 152. In addition, the contact area between the annular section 152 and the power supply module 800 is larger, the annular section 152 has a more compact structure and does not occupy so much space. When the annular section 152 is used to dissipate heat to the power supply module 800, the heat exchange effect between the third liquid channel 150 and the power supply module 800 can be improved so that the power supply module 800 can be quickly cooled and the heat dissipation effect is better.

[0101] In addition, the depth of the annular section 152 exceeds the depth of the second liquid channel 140 and the depth of the transition section 151. In this way, the volume of the annular section 152 can be larger, and more refrigerant can be provided within the annular section 152, thereby improving the heat dissipation effect of the annular section 152 on the power supply module 800. In addition, the transition between the second liquid channel 140 and the first liquid channel 130 can be smoother, the transition between the transition section 151 and the first liquid channel 130 can be smoother, and the refrigerant circulates more smoothly between the third liquid channel 150 and the first liquid channel 130. As a result, the refrigerant can sufficiently exchange heat with the power supply module 800 and the IGBT module, thereby further improving the heat dissipation effect on the power supply module 800 and the heat dissipation effect on the IGBT module 340.

[0102] In some specific embodiments of the present disclosure, as shown in FIG. 5, the electrical assembly 1 further includes a liquid inlet pipe 160 and a liquid outlet pipe 170. The liquid inlet pipe 160 is installed within the box 100 and communicates with the second liquid channel 140. The liquid outlet pipe 170 is installed within the box 100 and communicates with the liquid outlet hole 1521. The liquid inlet pipe 160 and the liquid outlet pipe 170 are arranged perpendicular to each other.

[0103] In this way, the refrigerant can flow from the liquid inlet pipe 160 into the second liquid channel 140, the first liquid channel 130, and the third liquid channel 150, and the refrigerant can also be discharged from the liquid outlet hole 1521 and the liquid outlet pipe 170. In other words, after the refrigerant has sufficiently exchanged heat with the power supply module 800 and the IGBT module 340, the refrigerant in the second liquid channel 140, the first liquid channel 130, and the third liquid channel 150 can be discharged from the liquid outlet pipe 170, and the refrigerant can also keep the refrigerant sufficiently in the second liquid channel 140, the first liquid channel 130, and the third liquid channel 150 and keep the temperature of the refrigerant low, so as to improve the cooling effect of the third liquid channel 150 and the first liquid channel 130 on the power supply module 800 and the IGBT module 340, and the refrigerant is replenished into the second liquid channel 140, the first liquid channel 130, and the third liquid channel 150 through the liquid inlet pipe 160.

[0104] In addition, the liquid inlet pipe 160 and the liquid outlet pipe 170 are arranged perpendicular to each other. For example, the liquid inlet pipe 160 may be arranged on one side surface of the box 100, and the liquid outlet pipe 170 may be arranged on an adjacent side surface of the box 100. In this way, the interference of the position between the liquid inlet pipe 160 and the liquid outlet pipe 170 can be avoided, thereby facilitating the arrangement. In addition, the lengths of the third liquid channel 150 and the first liquid channel 130 may be set to be longer so that the third liquid channel 150 and the first liquid channel 130 can cover most parts of the box 100, thereby further improving the cooling effect of the third liquid channel 150 and the first liquid channel 130 on the power supply module 800 and the IGBT module 340. In addition, the refrigerant in the third liquid channel 150 and the first liquid channel 130 can lower the temperature of the box 100, and as a result, the heat can also be dissipated to other components mounted in the box 100, thereby improving the heat dissipation effect of the box 100.

[0105] For example, as shown in FIGS. 5 and 7, the above-described arrangement makes the liquid outlet pipe 170 longer. Accordingly, a pressure plate 900 can be added. The pressure plate 900 is attached onto the box 100 and, together with the box 100, clamps the liquid outlet pipe 170 to fix the position of the liquid outlet pipe 170 relative to the box 100.

[0106] According to some specific embodiments of the present disclosure, as shown in FIGS. 6 to 8, the power supply module 800 includes a power supply distribution board 870. The power supply distribution board 870 is installed in the power supply cavity 190. Some devices are attached onto the power supply distribution board 870. Some devices include a transformer 820, a transformer inductor 830, an AC inductor 850, a DC inductor 860, and some MOS transistors 840.

[0107] The transformer 820 and the transformer inductor 830 are arranged separately. Some MOS transistors 840 are respectively arranged on two opposite sides of the transformer 820 and the transformer inductor 830. The AC inductor 850 and the DC inductor 860 are respectively arranged on two opposite sides of the transformer 820 and the transformer inductor 830. The third liquid channel 150 surrounds the transformer 820 and the transformer inductor 830. Some MOS transistors 840 are installed on two opposite sides of the third liquid channel 150 and exchange heat with the third liquid channel 150.

[0108] In this way, the third liquid channel 150 surrounds the transformer 820 and the transformer inductor 830, some MOS transistors 840 are installed outside the third liquid channel 150 and attached to the outer wall of the third liquid channel 150, and the third liquid channel 150 can be used to dissipate heat to the transformer 820, the transformer inductor 830, some MOS transistors 840, the AC inductor 850, and the DC inductor 860, thereby improving the heat dissipation efficiency of the power supply module 800.

[0109] In addition, the AC inductor 850 and the DC inductor 860 are respectively disposed on two opposite sides of the third liquid channel 150. In this way, the transformer inductor 830, the AC inductor 850, and the DC inductor 860 are separated by the side walls of the third liquid channel 150, thereby reducing the possibility and impact of electromagnetic interference between the transformer inductor 830, the AC inductor 850, and the DC inductor 860, and also improving the control reliability of the electric assembly 1.

[0110] According to some specific embodiments of the present disclosure, as shown in FIGS. 6 and 7, the power supply cavity 190 is provided with a plurality of MOS transistor cavities 191, AC inductor cavities 192, and DC inductor cavities 193. The AC inductor 850 extends into the AC inductor cavity 192. The DC inductor 860 extends into the DC inductor cavity 193. A plurality of MOS transistors 840 extend into the plurality of MOS transistor cavities 191 in a one-to-one correspondence. In this way, electromagnetic interference between the plurality of MOS transistors 840, the AC inductor 850, the DC inductor 860, and the transformer inductor 830 is further avoided, and interference with external electronic devices can also be avoided, thereby assisting in improving electromagnetic field compatibility.

[0111] A vehicle 1000 according to an embodiment of the present disclosure will be described below with reference to FIG. 13. The vehicle 1000 includes the electric assembly 1 according to the above-described embodiments of the present disclosure.

[0112] In the vehicle 1000 according to this embodiment of the present disclosure, the electric assembly 1 according to the above-described embodiments of the present disclosure is used. As a result, self-heating of the battery pack 2 can be implemented, and the three-phase windings 210 of the motor 200 and the bridge arms 350 of the electric control module 300 are also reused in the self-heating circuit of the battery pack 2, which has advantages such as low cost, small volume, and few components.

[0113] The electric assembly 1 according to the embodiments of the present disclosure, as well as other forms and operations of the vehicle provided with the same, are known to those skilled in the art and will not be described in detail herein.

[0114] In the description of this specification, descriptions using directive words such as "one embodiment", "some embodiments", "exemplary embodiments", "an example", "a specific example", or "some examples" mean that the specific characteristics, structures, materials, or features described with reference to the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0115] Although the embodiments of the present disclosure have been illustrated and described, it should be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the present disclosure, and that the scope of the present disclosure is as defined by the appended claims and their equivalents.

Explanation of Reference Numerals

[0116] 1 Electric assembly 2 Battery pack 3 Capacitor housing 100 Box 101 Bracket 102 Shielding rib 103 Shielding cavity 110 Electric control cavity 120 Liquid channel cover plate 130 First liquid channel 140 Second liquid channel 150 Third liquid channel 151 Transition section 152 Annular section 160 Liquid inlet pipe 170 Liquid outlet pipe 180 Sealing ring 190 Power supply cavity 191 MOS transistor cavity 192 AC Inductor Cavity 193 DC Inductor Cavity 200 Motor 210 Wiring 220 N - wire Nose 230 Casing 240 End Cover 250 N - wire Connection Assembly 251 N - wire Adapter 252 N - wire 253 N - wire Socket 260 Opening 270 Insertion Groove 300 Electric Control Module 310 Driving Plate 320 Control Panel 330 Shielding Plate 340 IGBT Module 350 Bridge Arm 351 Upper Bridge Arm 352 Lower Bridge Arm 400 DC Connector 410 Positive Fuse 420 Negative Fuse 500 First Capacitor 510 Negative Output Copper Busbar 600 Second Capacitor 610 Second Capacitor Contactor 700 Boost Capacitor 800 Power Supply Module 810 Base Plate 820 Transformer 830 Transformer Inductor 840 MOS Transistor 850 AC Inductor 860 DC Inductor 870 Power Supply Switchboard 900 Pressing Plate 910 Wire Harness Fixing Groove 920 Cable Tie Hole 1000 Vehicle

Claims

1. A box (100) comprising an electrically controlled cavity (110), An N-line connection assembly (250), one end (2501) of the N-line connection assembly (250) being adapted to be connected between two battery packs (2) connected in series, A motor (200) comprising a three-phase winding (210), one end (2101) of the three-phase winding (210) being a joined end, the joined end being connected to another end (2502) of the N-line connection assembly (250), An electric control module (300) mounted within the electrically controlled cavity (110), An insulated gate bipolar transistor (IGBT) module (340) comprising a three-phase bridge arm (350), the other ends (2102) of the three-phase winding (210) being respectively connected to the midpoints of the three-phase bridge arm (350), and A DC connector (400), a positive electrode (4001) of the DC connector (400) being connected to the joined end, a negative electrode (4002) of the DC connector (400) being connected to the IGBT module (340) and being adapted to be connected to the negative electrode of the battery pack (2), An electric control module (300) comprising, An electric assembly (1) comprising.

2. A first capacitor (500) mounted within the electrically controlled cavity (110) and being an X capacitor, one end (5001) of the first capacitor (500) being connected to the positive electrode (4001) of the DC connector (400), the other end (5002) of the first capacitor (500) being connected to the negative electrode (4002) of the DC connector (400), The electric assembly (1) according to claim 1, further comprising.

3. A second capacitor (600) that is mounted within the electric control cavity (110) and is an X capacitor, wherein one end (6001) of the second capacitor (600) is connected to the one end (5001) of the first capacitor (500), and the other end (6002) of the second capacitor (600) is connected to the positive electrode (4001) of the DC connector (400). A second capacitor connector (610) mounted within the electric control cavity (110), wherein one end (6101) of the second capacitor connector (610) is connected to the one end (6001) of the second capacitor (600), and the other end (6102) of the second capacitor connector (610) is connected to the one end (2101) of the three-phase winding (210). The electric assembly (1) according to claim 2, further comprising the above.

4. A boost capacitor (700) mounted within the electric control cavity (110), wherein one end (7001) of the boost capacitor (700) is connected to the negative electrode (4002) of the DC connector (400), and the other end (7002) of the boost capacitor (700) is connected to the other end (2102) of the three-phase winding (210). The electric assembly (1) according to claim 3, further comprising the above.

5. A capacitor housing (3) incorporating the first capacitor (500), the second capacitor (600), and the boost capacitor (700). The electric assembly (1) according to claim 4, further comprising the above.

6. A negative output copper busbar (510) mounted within the capacitor housing (3) and shared by the first capacitor (500) and the second capacitor (600). The electric assembly (1) according to claim 5, further comprising the above.

7. A plurality of wire harness fixing grooves (910) are provided on the capacitor housing (3), and the plurality of wire harness fixing grooves (910) are provided at least partially above the second capacitor (600). The electrical assembly (1) according to claim 5 or 6.

8. A positive fuse (410) mounted in the electrical control cavity (110), one end (4101) of the positive fuse (410) being connected to the positive electrode (4001) of the DC connector (400), and the other end (4102) of the positive fuse (410) being connected to the upper bridge arm (351) of each phase bridge arm (350). A positive fuse (410). A negative fuse (420) mounted in the electrical control cavity (110) and disposed below the positive fuse (410), one end (4201) of the negative fuse (420) being connected to the negative electrode (4002) of the DC connector (400), and the other end (4202) of the negative fuse (420) being connected to the lower bridge arm (352) of each phase bridge arm (350). A negative fuse (420). The electrical assembly (1) according to any one of claims 1 to 7, further comprising.

9. A power supply module (800), the box (100) further comprising a power supply cavity (190), the power supply cavity (190) being provided below the electrical control cavity (110), and the power supply module (800) being disposed in the power supply cavity (190). A power supply module (800). The electrical assembly (1) according to any one of claims 1 to 8, further comprising.

10. A bracket (101) is disposed in the box (100), the bracket (101) divides the box (100) into the electrical control cavity (110) above and the power supply cavity (190) below, and a plurality of shielding ribs (102) extending facing the power supply cavity (190) are disposed on the bracket (101), the shielding ribs (102) form a shielding cavity (103), and the shielding cavity (103) is configured to attach a device forming the power supply module (800). The electrical assembly (1) according to claim 9.

11. The electrical assembly (1) according to claim 9 or 10, wherein the box (100) further comprises a bottom plate (810) configured to close an opening (260) below the power supply cavity (190).

12. The motor (200) is a casing (230) in which the three-phase winding (210) is disposed therein, an end cover (240) disposed at one end of the casing (230) and configured to close the casing (230), the end cover (240) being provided with an opening (260) for the N-line connection assembly (250) to pass through, The electrical assembly (1) according to any one of claims 1 to 11, comprising:

13. The N-line connection assembly (250) is an N-line (252), one end of the N-line (252) being connected to the one end (2101) of the three-phase winding (210), an N-line adapter (251), one end of the N-line adapter (251) being connected to the one end of the N-line (252), an N-line nose (220), the other end of the N-line adapter (251) passing through the opening (260) and being connected to one end of the N-line nose (220), an N-line socket (253), one end of the N-line socket (253) being connected to the other end of the N-line (252), the other end of the N-line socket (253) being connected to the N-line copper busbar (3001) of the electric control module (300), the N-line copper busbar (3001) passing through a hole (3002), the hole (3002) being connected to the electric control module (300) through a signal cable, The electrical assembly (1) according to claim 12, comprising:

14. An insertion groove (260) is provided at the one end of the casing (230) close to the end cover (240), the insertion groove (260) is provided in proximity to the electric control cavity (110), the N-line socket (253) is inserted into the insertion groove (260) and fixedly connected to the casing (230). The electrical assembly (1) according to claim 13.

15. A liquid channel cover plate (120) provided with a first liquid channel (130), wherein a second liquid channel (140) and a third liquid channel (150) are provided in the electric control cavity (110), the liquid channel cover plate (120) is connected to the box (100) and closes the second liquid channel (140) and the third liquid channel (150), the first liquid channel (130) communicates with the second liquid channel (140) and the third liquid channel (150), the second liquid channel (140) is adapted to communicate with a liquid inlet pipe (160), and the third liquid channel (150) is adapted to communicate with a liquid outlet pipe (170), the liquid channel cover plate (120) further comprising the refrigerant in the second liquid channel (140) flows into the first liquid channel (130) to dissipate heat to the IGBT module (340), and the refrigerant in the first liquid channel (130) flows into the third liquid channel (150) to dissipate heat to the power supply module (800). The electrical assembly (1) according to any one of claims 9 to 11.

16. A sealing ring (180), wherein a sealing groove surrounding the first liquid channel (130) is provided on the liquid channel cover plate (120), the sealing ring (180) is disposed in the sealing groove, the IGBT module (340) presses the sealing ring (180), and the sealing ring (180) fills a gap between the liquid channel cover plate (120) and the IGBT module (340), the sealing ring (180) The electrical assembly (1) according to claim 15, further comprising.

17. The third liquid channel (150) is a transition section (151), wherein the transition section (151) communicates with the first liquid channel (130), the transition section (151) An annular section (152) that surrounds the power supply module (800) and dissipates heat to the power supply module (800), one end of the annular section (152) being connected to the other end of the transition section (151), and a liquid outlet hole (1521) being provided at the other end of the annular section (152), the annular section (152); comprising; The electrical assembly (1) according to claim 15 or 16, wherein the depth of the annular section (152) exceeds the depth of the second liquid channel (140) and the depth of the transition section (151).

18. The power supply module (800) comprises a power supply distribution board (870) mounted in the power supply cavity (190), and a plurality of devices are mounted on the power supply distribution board (870), wherein the plurality of devices a transformer (820); a transformer inductor (830), the transformer inductor (830) being arranged at a distance from the transformer (820); a plurality of MOS transistors (840) respectively arranged on two opposite sides of the transformer (820) and the transformer inductor (830); an AC inductor (850); a DC inductor (860), the DC inductor (860) and the AC inductor (850) being respectively arranged on two opposite sides of the transformer (820) and the transformer inductor (830), the DC inductor (860); comprising; The electrical assembly (1) according to any one of claims 15 to 17, wherein the third liquid channel (150) surrounds the transformer (820) and the transformer inductor (830), the plurality of MOS transistors (840) are installed on two opposite sides of the third liquid channel (150), and exchange heat with the third liquid channel (150).

19. In the power supply cavity (190), a plurality of MOS transistor (840) cavities (191), an AC inductor cavity (192), and a DC inductor cavity (193) are provided. The AC inductor (850) extends into the AC inductor cavity (192), the DC inductor (860) extends into the DC inductor cavity (193), and the plurality of MOS transistors (840) extend into the plurality of MOS transistor cavities (191) in a one-to-one correspondence. The electrical assembly (1) according to claim 18.

20. The electric control module (300) includes a control panel (320), and a drive panel (310) disposed below the control panel (320) and further includes the IGBT module (340) is disposed on the drive panel (310), and the IGBT module (340) is connected to the control panel (320). The electrical assembly (1) includes a shielding plate (330) disposed between the drive panel (310) and the control panel (320). The electrical assembly (1) according to any one of claims 1 to 19, further comprising.

21. A vehicle (1000) comprising the electrical assembly (1) according to any one of claims 1 to 20.

Images