Electric drive assembly and electric automobile

Abstract

The utility model provides an electric drive assembly and an electric automobile, and relates to the technical field of new energy automobiles. The electric drive assembly comprises a six-phase motor which comprises a first three-phase winding and a second three-phase winding, and the first three-phase winding and the second three-phase winding are mutually inducted; the alternating current end of the first inverter is connected with the first three-phase winding, and the direct current end of the first inverter is connected with the power battery; the alternating current end of the second inverter is connected with the second three-phase winding, the direct current end of the second inverter is connected with the first inverter through a first group of relays, and the direct current end of the second inverter is connected with a direct current charging seat through a second group of relays; the controller is connected with the first group of relays and the second group of relays and used for controlling the states of the first group of relays and the second group of relays, and the power battery is in a charging state or a discharging state. According to the scheme, the high-voltage integration level of the electric automobile is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and particularly relates to an electric drive assembly and an electric vehicle. Background Art

[0002] Due to excellent environmental performance and economy, electric vehicles are more and more widely used. However, the large-scale popularization of electric vehicles is still restricted by many factors. Electric vehicles are powered by power batteries, and the motor converts electrical energy into mechanical energy to drive the vehicle. The on-board charger (OBC) of the electric vehicle is connected to an external power source and can charge the power battery. However, the OBC needs to occupy a certain space, resulting in a low high-voltage integration degree of the electric vehicle. Summary of the Utility Model

[0003] The purpose of the technical solution of the utility model is to provide an electric drive assembly and an electric vehicle to solve the problem of low high-voltage integration degree of electric vehicles in the prior art.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] In the first aspect, an embodiment of the utility model provides an electric drive assembly, including:

[0006] A six-phase motor, the six-phase motor includes a first three-phase winding and a second three-phase winding, and the first three-phase winding and the second three-phase winding have mutual inductance;

[0007] A first inverter, the AC terminal of the first inverter is connected to the first three-phase winding, and the DC terminal of the first inverter is connected to the power battery;

[0008] A second inverter, the AC terminal of the second inverter is connected to the second three-phase winding, the DC terminal of the second inverter is connected to the first inverter through a first set of relays, and the DC terminal of the second inverter is connected to a DC charging socket through a second set of relays;

[0009] A controller, connected to the first set of relays and the second set of relays, for controlling the states of the first set of relays and the second set of relays, and the power battery is in a charging state or a discharging state.

[0010] Optionally, for the electric drive assembly,

[0011] The first inverter includes:

[0012] Six first power switch devices, the six first power switch devices are connected to the power battery and the first group of relays, and the end of each phase winding of the first three-phase winding is connected to two of the first power switch devices;

[0013] The second inverter includes:

[0014] Six second power switch devices, the six second power switch devices are connected to the DC charging socket and the second group of relays, and the end of each phase winding of the second three-phase winding is connected to two of the second power switch devices.

[0015] Optionally, in the electric drive assembly, when the power battery is in a charging state, the states of the first group of relays and the second group of relays satisfy one of the following:

[0016] The states of the first group of relays and the second group of relays are in a closed state, and the DC charging socket is used to connect to a DC charging pile;

[0017] The state of the first group of relays is in an open state, the state of the second group of relays is in a closed state, and the DC charging socket is used to connect to a DC charging pile.

[0018] Optionally, in the electric drive assembly, when the power battery is in a discharging state, the states of the first group of relays and the second group of relays satisfy one of the following:

[0019] The state of the first group of relays is in a closed state, the state of the second group of relays is in an open state;

[0020] The state of the first group of relays is in an open state, the state of the second group of relays is in a closed state, and the DC charging socket is used to connect to other vehicles.

[0021] Optionally, in the electric drive assembly, further includes:

[0022] A rectification module, the rectification module is connected to the AC charging socket, and the rectification module is connected to the DC end of the second inverter through a third group of relays.

[0023] Optionally, in the electric drive assembly, the rectification module includes:

[0024] Six diodes, the six diodes are connected to the DC end of the second inverter through the third group of relays, and the end of each phase of the AC charging socket is connected to two of the diodes.

[0025] Optionally, for the electric drive assembly described above, when the power battery is in a charging state, the states of the first group of relays, the second group of relays, and the third group of relays satisfy one of the following:

[0026] The states of the first group of relays and the second group of relays are closed states, the state of the third group of relays is an open state, and the DC charging socket is used to connect to a DC charging pile;

[0027] The states of the first group of relays and the third group of relays are open states, the state of the second group of relays is a closed state, and the DC charging socket is used to connect to a DC charging pile;

[0028] The states of the first group of relays and the second group of relays are open states, the state of the third group of relays is a closed state, and the AC charging socket is used to connect to an AC charging pile.

[0029] Optionally, for the electric drive assembly described above, when the power battery is in a discharging state, the states of the first group of relays, the second group of relays, and the third group of relays satisfy one of the following:

[0030] The state of the first group of relays is a closed state, and the states of the second group of relays and the third group of relays are open states;

[0031] The states of the first group of relays and the third group of relays are open states, the state of the second group of relays is a closed state, and the DC charging socket is used to connect to other vehicles.

[0032] In a second aspect, an embodiment of the present invention provides an electric vehicle, including the electric drive assembly described in the first aspect.

[0033] The above technical solution of the present invention has at least the following beneficial effects:

[0034] The electric drive assembly described in the embodiment of the present utility model includes: a six-phase motor, the six-phase motor includes a first three-phase winding and a second three-phase winding, and the first three-phase winding and the second three-phase winding are mutually inductive; a first inverter, the AC terminal of the first inverter is connected to the first three-phase winding, and the DC terminal of the first inverter is connected to a power battery; a second inverter, the AC terminal of the second inverter is connected to the second three-phase winding, the DC terminal of the second inverter is connected to the first inverter through a first group of relays, and the DC terminal of the second inverter is connected to a DC charging socket through a second group of relays; a controller, connected to the first group of relays and the second group of relays, for controlling the states of the first group of relays and the second group of relays, and the power battery is in a charging state or a discharging state. Thus, through the above components, the power battery can be in a charging state or a discharging state, and the electric drive assembly has the functions of driving the vehicle to travel, DC charging the vehicle, boosting charging the vehicle, and discharging the vehicle to the outside, eliminating components such as the OBC and the high-voltage wiring harness connected thereto, and improving the high-voltage integration of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 FIG. shows a circuit schematic diagram of one of the embodiments of the electric drive assembly described in the embodiment of the present utility model;

[0036] Figure 2 FIG. shows a circuit schematic diagram of another embodiment of the electric drive assembly described in the embodiment of the present utility model;

[0037] Figure 3 FIG. shows a circuit schematic diagram of one of the embodiments in which the power battery described in the embodiment of the present utility model is in a charging state;

[0038] Figure 4 FIG. shows a circuit schematic diagram of another embodiment in which the power battery described in the embodiment of the present utility model is in a charging state;

[0039] Figure 5 FIG. shows a circuit schematic diagram of one of the embodiments in which the power battery described in the embodiment of the present utility model is in a discharging state;

[0040] Figure 6 FIG. shows a circuit schematic diagram of another embodiment in which the power battery described in the embodiment of the present utility model is in a discharging state;

[0041] Figure 7 FIG. shows a circuit schematic diagram of a third embodiment in which the power battery described in the embodiment of the present utility model is in a charging state. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] The present utility model aims at the problem of low high-voltage integration in electric vehicles in the prior art, and provides an electric drive assembly and an automobile.

[0044] As Figure 1 shown, an embodiment of the present utility model provides an electric drive assembly, including:

[0045] A six-phase motor, the six-phase motor includes a first three-phase winding La, Lb, Lc and a second three-phase winding Ld, Le, Lf, and the first three-phase winding La, Lb, Lc and the second three-phase winding Ld, Le, Lf are mutually inductive and isolated;

[0046] A first inverter, the AC terminal of the first inverter is connected to the first three-phase winding La, Lb, Lc, and the DC terminal of the first inverter is connected to the power battery;

[0047] A second inverter, the AC terminal of the second inverter is connected to the second three-phase winding Ld, Le, Lf, the DC terminal of the second inverter is connected to the first inverter through a first group of relays, and the DC terminal of the second inverter is connected to the DC charging socket through a second group of relays;

[0048] A controller, connected to the first group of relays and the second group of relays, for controlling the states of the first group of relays and the second group of relays, and the power battery is in a charging state or a discharging state.

[0049] Among them, the first group of relays includes:

[0050] A first relay K1, connected to the negative electrode of the power battery, the negative electrode of the DC terminal of the first inverter, and the negative electrode of the DC terminal of the second inverter;

[0051] A second relay K2, connected to the positive electrode of the power battery, the positive electrode of the DC terminal of the first inverter, and the positive electrode of the DC terminal of the second inverter.

[0052] The second group of relays includes:

[0053] A third relay K3, connected to the negative electrode of the DC terminal of the second inverter and the negative electrode of the DC charging socket;

[0054] A fourth relay K4, connected to the positive electrode of the DC terminal of the second inverter and the positive electrode of the DC charging socket.

[0055] It should be noted that the controller is also connected to the control terminals of the first inverter and the second inverter, and is used to control the states of the first group of relays and the second group of relays, and control the vector states of the first inverter and the second inverter, where the power battery is in a charging state or a discharging state.

[0056] As an optional embodiment, the first inverter includes:

[0057] Six first power switching devices, the six first power switching devices are connected to the power battery and the first group of relays, and the end of each phase winding of the first three-phase winding is connected to two of the first power switching devices.

[0058] Here, in combination with Figure 1 Specific description of the first inverter is as follows:

[0059] The end of each phase winding of the first three-phase winding is connected to two first power switching devices. For example, the end A of winding La is respectively connected to the first power switching devices T1 and T4, the end B of winding Lb is respectively connected to the first power switching devices T3 and T6, and the end C of winding Lc is respectively connected to the first power switching devices T2 and T5.

[0060] The second inverter includes:

[0061] Six second power switching devices, the six second power switching devices are connected to the DC charging socket and the second group of relays, and the end of each phase winding of the second three-phase winding is connected to two of the second power switching devices.

[0062] Here, continue to combine Figure 1 Specific description of the second inverter is as follows:

[0063] The end of each phase winding of the second three-phase winding is connected to two second power switching devices. For example, the end D of winding Ld is respectively connected to the second power switching devices T7 and T10, the end E of winding Le is respectively connected to the second power switching devices T9 and T12, and the end F of winding Lf is respectively connected to the second power switching devices T8 and T11.

[0064] As an optional embodiment, when the power battery is in a charging state, the states of the first group of relays and the second group of relays satisfy one of the following:

[0065] The states of the first group of relays and the second group of relays are in a closed state, and the DC charging socket is used to connect to a DC charging pile;

[0066] The state of the first group of relays is the open state, the state of the second group of relays is the closed state, and the DC charging socket is used to connect to a DC charging pile.

[0067] In the embodiment of the present utility model, when the power battery is in the charging state, the following first condition or second condition is satisfied.

[0068] Among them, the first condition includes: the states of the first group of relays K1, K2 and the second group of relays K3, K4 are the closed state, and the states of the first inverters T1, T2, T3, T4, T5, T6 and the second inverters T7, T8, T9, T10, T11, T12 are the off state. As Figure 3 shown, under this first condition, the six-phase motor does not work, the power battery is connected to an external DC charging pile through the DC charging socket, and the external DC charging pile can charge the power battery. The power battery is in the charging state, and the flow direction of the charging current is as Figure 3 shown by the black dotted line in, so the electric drive assembly described in the embodiment of the present utility model has the vehicle DC charging function.

[0069] The second condition includes: the states of the first group of relays K1, K2 are the open state, the states of the second group of relays K3, K4 are the closed state, and the state of the six-phase motor is the transformer working state (i.e., the six-phase motor works as a transformer), the state of the first three-phase windings La, Lb, Lc is the secondary side of the transformer (i.e., the first three-phase windings La, Lb, Lc act as the secondary side of the transformer), and the state of the second three-phase windings Ld, Le, Lf is the primary side of the transformer (i.e., the second three-phase windings Ld, Le, Lf act as the primary side of the transformer). As Figure 4 shown, under this second condition, the six-phase motor and the first inverter and the second inverter form a high-power DC converter (DC-DC converter, abbreviated as DCDC) to adjust the voltage across the power battery. The power battery is connected to an external DC charging pile through the DC charging socket, and the external DC charging pile can charge the power battery. The power battery is in the charging state, and the flow direction of the charging current is as Figure 4 shown by the black dotted line in. The second three-phase windings Ld, Le, Lf act as the primary side of the transformer, and the vector state is controlled by the controller to control the rotation of the rotor of the six-phase motor. The rotation generates rotating magnetic induction lines, and an induced voltage is generated in the first three-phase windings La, Lb, Lc that act as the secondary side of the transformer. The induced voltage is controllably rectified by the first inverter to charge the power battery.

[0070] It should be noted that under this second condition, the primary side and the secondary side of the transformer are completely isolated, thereby enhancing the insulation level. This second condition is applicable to the case where the voltage of the external DC charging pile is lower than the voltage of the power battery. For example, a 500V DC charging pile charges a 600V power battery. Therefore, the electric drive assembly described in the embodiments of the present invention has the function of boosting the vehicle for charging.

[0071] As an optional embodiment, when the power battery is in a discharging state, the states of the first group of relays and the second group of relays satisfy one of the following:

[0072] The state of the first group of relays is a closed state, and the state of the second group of relays is an open state;

[0073] The state of the first group of relays is an open state, and the state of the second group of relays is a closed state, and the DC charging socket is used to connect to the vehicle.

[0074] In the embodiments of the present invention, when the power battery is in a discharging state, the following third condition or fourth condition is satisfied.

[0075] Among them, the third condition includes: the states of the first group of relays K1 and K2 are closed states, and the states of the second group of relays K3 and K4 are open states. As Figure 5 shown, under this third condition, the first inverter serves as the first motor driver, and the second inverter serves as the second motor driver. The two inverters are completely isolated, and the vector states of both are controlled by the controller, so as to control the corresponding first three-phase winding or second three-phase winding to provide power and drive the electric vehicle to travel.

[0076] The two motor drivers convert the direct current of the power battery into alternating current. The power battery is in a discharging state, and the flow direction of the discharging current is as shown by the black dotted line in Figure 5 . The first motor driver provides power for the first three-phase winding, and the second motor driver provides power for the second three-phase winding to drive the electric vehicle to travel. The two motor drivers are independent of each other, can jointly provide peak power, and the two motor drivers are redundant backups for each other. When one motor driver fails, the other motor driver can independently drive the electric vehicle to travel. Therefore, the electric drive assembly described in the embodiments of the present invention has the function of driving the vehicle to travel.

[0077] The fourth condition includes: the first group of relays K1 and K2 are in the off state, the second group of relays K3 and K4 are in the on state, and the six-phase motor is in the transformer operating state (i.e., the six-phase motor operates as a transformer), the first three-phase windings La, Lb, and Lc are the primary side of the transformer (i.e., the first three-phase windings La, Lb, and Lc serve as the primary side of the transformer), and the second three-phase windings Ld, Le, and Lf are the secondary side of the transformer (i.e., the second three-phase windings Ld, Le, and Lf serve as the secondary side of the transformer). As Figure 6 shown, under this fourth condition, the six-phase motor, the first inverter, and the second inverter form a high-power DCDC to adjust the voltage across the power battery. The power battery is connected to other vehicles through a DC charging socket and can discharge to other vehicles. The power battery is in the discharging state, and the direction of the discharging current is as Figure 6 shown by the black dashed line in. The first three-phase windings La, Lb, and Lc, as the primary side of the transformer, are controlled by the controller for the vector state to control the rotation of the rotor of the six-phase motor. The rotation generates rotating magnetic induction lines, and an induced voltage is generated in the second three-phase windings Ld, Le, and Lf, which serve as the secondary side of the transformer. This induced voltage is controllably rectified by the second inverter to charge the power battery of other vehicles.

[0078] It should be noted that under this fourth condition, the primary side and the secondary side of the transformer are completely isolated, thereby enhancing the insulation level. This fourth condition is applicable when the vehicle needs to externally discharge DC power to charge other vehicles. Therefore, the electric drive assembly described in the embodiments of the present invention has the function of externally discharging DC power for the vehicle.

[0079] As an alternative embodiment, as Figure 2 shown, the above electric drive assembly further includes:

[0080] a rectification module, the rectification module is connected to the AC charging socket, and the rectification module is connected to the DC terminal of the second inverter through a third group of relays.

[0081] Among them, the third group of relays includes:

[0082] a fifth relay K5, connected to the negative pole of the DC terminal of the second inverter and the negative pole of the rectification module;

[0083] a sixth relay K6, connected to the positive pole of the DC terminal of the second inverter and the positive pole of the rectification module.

[0084] As an alternative embodiment, the rectification module includes:

[0085] six diodes, the six diodes are connected to the DC terminal of the second inverter through the third group of relays, and the end of each phase of the AC charging socket is connected to two of the diodes.

[0086] Here, in combination with Figure 2 a specific description of the rectification module is given as follows:

[0087] The end of each phase of the AC charging socket is connected to two diodes. For example, the end of the first phase is respectively connected to the positive electrode of diode D1 and the negative electrode of diode D2, the end of the second phase is respectively connected to the positive electrode of diode D3 and the negative electrode of diode D4, and the end of the third phase is respectively connected to the positive electrode of diode D5 and the negative electrode of diode D6;

[0088] The six diodes are connected to the DC terminal of the second inverter through the third group of relays. For example, the negative electrodes of diodes D1, D2, and D3 are connected to the negative terminal of the DC terminal of the second inverter through K5 in the third group of relays, and the positive electrodes of diodes D4, D5, and D6 are connected to the positive terminal of the DC terminal of the second inverter through K6 in the third group of relays.

[0089] As an optional embodiment, when the power battery is in the charging state, the states of the first group of relays, the second group of relays, and the third group of relays satisfy one of the following:

[0090] The states of the first group of relays and the second group of relays are in the closed state, and the state of the third group of relays is in the open state. The DC charging socket is used to connect to a DC charging pile;

[0091] The states of the first group of relays and the third group of relays are in the open state, and the state of the second group of relays is in the closed state. The DC charging socket is used to connect to a DC charging pile;

[0092] The states of the first group of relays and the second group of relays are in the open state, and the state of the third group of relays is in the closed state. The AC charging socket is used to connect to an AC charging pile.

[0093] Among them, when the power battery is in the charging state, one of the following fifth condition, sixth condition, and seventh condition is satisfied.

[0094] Among them. The fifth condition includes: the first condition, and the states of the third group of relays K5 and K6 are in the open state. The first condition has been described in the above embodiment and will not be elaborated here.

[0095] The sixth condition includes: the second condition, and the states of the third group of relays K5 and K6 are in the open state. The second condition has been described in the above embodiment and will not be elaborated here.

[0096] The seventh condition includes: the states of the first group of relays K1 and K2 and the second group of relays K3 and K4 are open states, the states of the third group of relays K5 and K6 are closed states, and the state of the six-phase motor is the transformer operating state (i.e., the six-phase motor operates as a transformer). The states of the first three-phase windings La, Lb, and Lc are the secondary side of the transformer (i.e., the first three-phase windings La, Lb, and Lc serve as the secondary side of the transformer), and the states of the second three-phase windings Ld, Le, and Lf are the primary side of the transformer (i.e., the second three-phase windings Ld, Le, and Lf serve as the primary side of the transformer). As Figure 7 shown, under this seventh condition, the six-phase motor, the first inverter, and the second inverter form a high-power DCDC to adjust the voltage across the power battery to charge the power battery. The power battery is connected to an external AC charging pile through an AC charging socket, and the power battery is in a charging state. The flow direction of the charging current is as Figure 7 shown by the black dashed line in. The second three-phase windings Ld, Le, and Lf, as the primary side of the transformer, are controlled by the controller for the vector state, thereby controlling the rotation of the rotor of the six-phase motor. The rotation generates rotating magnetic induction lines, and an induced voltage is generated in the first three-phase windings La, Lb, and Lc, which serve as the secondary side of the transformer. The induced voltage is controllably rectified by the first inverter to charge the power battery.

[0097] It should be noted that under this seventh condition, the primary side and the secondary side of the transformer are completely isolated, thereby enhancing the insulation level. Therefore, the electric drive assembly described in the embodiment of the present invention has the vehicle AC charging function.

[0098] It should also be noted that by connecting a charging power source through a DC charging socket or an AC charging socket, in addition to the above-mentioned DC charging pile and AC charging pile, the charging power source in the embodiment of the present invention can also be one of the following:

[0099] A single-phase AC power source of 110V to 240VAC;

[0100] A three-phase AC power source of 208V to 480VAC;

[0101] A DC charging pile of 250V to 750VAC;

[0102] A solar panel;

[0103] An untreated DC power source for energy storage.

[0104] As an optional embodiment, when the power battery is in a discharging state, the states of the first group of relays, the second group of relays, and the third group of relays satisfy one of the following:

[0105] The state of the first group of relays is a closed state, and the states of the second group of relays and the third group of relays are open states;

[0106] The states of the first group of relays and the third group of relays are open states, the state of the second group of relays is a closed state, and the DC charging socket is used to connect other vehicles.

[0107] In the embodiment of the present invention, when the power battery is in a discharging state, the following eighth condition or ninth condition is satisfied.

[0108] Among them. The eighth condition includes: the third condition, and the states of the third group of relays K5 and K6 are open states. The first condition has been described in the above embodiment and will not be elaborated here.

[0109] The ninth condition includes: the fourth condition, and the states of the third group of relays K5 and K6 are open states. The second condition has been described in the above embodiment and will not be elaborated here.

[0110] In summary, by adopting the electric drive assembly described in the embodiment of the present invention, in addition to the function of driving the vehicle to travel, the functions of AC charging of the vehicle, DC charging of the vehicle, boost charging of the vehicle, and external DC discharging of the vehicle are realized, adapting to various charging sources. Therefore, components such as the OBC and the high-voltage wiring harness connected thereto are omitted, the high-voltage integration degree of the electric vehicle is improved, and the overall vehicle cost, quality, and volume are greatly reduced. Moreover, the charging and discharging ends are completely isolated, ensuring the insulation performance, eliminating the potential safety hazard of electric leakage, ensuring safety and reliability, and adapting to various charging power sources.

[0111] The electric vehicle provided by the embodiment of the present invention includes the electric drive assembly as described above. Then, all the embodiments of the above electric drive assembly are applicable to this electric vehicle and can achieve the same or similar beneficial effects, which will not be elaborated here.

[0112] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements can be made without departing from the principle described in the present invention, and these improvements and refinements are also within the protection scope of the present invention.

Claims

1. An electric drive assembly, characterized in that, Comprising: A six-phase motor, the six-phase motor including a first three-phase winding and a second three-phase winding, the first three-phase winding and the second three-phase winding having mutual inductance; A first inverter, an AC terminal of the first inverter being connected to the first three-phase winding, and a DC terminal of the first inverter being connected to a power battery; A second inverter, an AC terminal of the second inverter being connected to the second three-phase winding, a DC terminal of the second inverter being connected to the first inverter through a first set of relays, and a DC terminal of the second inverter being connected to a DC charging socket through a second set of relays; A controller, connected to the first set of relays and the second set of relays, for controlling states of the first set of relays and the second set of relays, the power battery being in a charging state or a discharging state.

2. The electric drive assembly according to claim 1, wherein: The first inverter includes: Six first power switch devices, the six first power switch devices being connected to the power battery and the first set of relays, and an end of each phase winding of the first three-phase winding being connected to two of the first power switch devices; The second inverter includes: Six second power switch devices, the six second power switch devices being connected to the DC charging socket and the second set of relays, and an end of each phase winding of the second three-phase winding being connected to two of the second power switch devices.

3. The electric drive assembly according to claim 1, characterized in that, When the power battery is in a charging state, the states of the first set of relays and the second set of relays satisfy one of the following: The states of the first set of relays and the second set of relays are closed states, and the DC charging socket is used to connect to a DC charging pile; The state of the first set of relays is an open state, the state of the second set of relays is a closed state, and the DC charging socket is used to connect to a DC charging pile.

4. The electric drive assembly according to claim 1, characterized in that, When the power battery is in a discharging state, the states of the first set of relays and the second set of relays satisfy one of the following: The state of the first set of relays is a closed state, and the state of the second set of relays is an open state; The state of the first set of relays is an open state, the state of the second set of relays is a closed state, and the DC charging socket is used to connect to other vehicles.

5. The electric drive assembly according to claim 1, wherein Further comprising: A rectification module, the rectification module being connected to an AC charging socket, and the rectification module being connected to a DC terminal of the second inverter through a third set of relays.

6. The electric drive assembly according to claim 5, characterized in that, The rectification module includes: Six diodes, the six diodes being connected to a DC terminal of the second inverter through the third set of relays, and an end of each phase of the AC charging socket being connected to two of the diodes.

7. The electric drive assembly according to claim 5, wherein, When the power battery is in a charging state, the states of the first set of relays, the second set of relays, and the third set of relays satisfy one of the following: The states of the first set of relays and the second set of relays are closed states, the state of the third set of relays is an open state, and the DC charging socket is used to connect to a DC charging pile; The states of the first group of relays and the third group of relays are off states, the state of the second group of relays is on state, and the DC charging socket is used to connect to a DC charging pile; The states of the first group of relays and the second group of relays are off states, the state of the third group of relays is on state, and the AC charging socket is used to connect to an AC charging pile.

8. The electric drive assembly according to claim 5, characterized in that, When the power battery is in a discharging state, the states of the first group of relays, the second group of relays and the third group of relays satisfy one of the following: The state of the first group of relays is on state, and the states of the second group of relays and the third group of relays are off states; The states of the first group of relays and the third group of relays are off states, the state of the second group of relays is on state, and the DC charging socket is used to connect to other vehicles.

9. An electric vehicle, characterized in that, It includes the electric drive assembly according to any one of claims 1 to 8.

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