Charging and driving integrated system, whole vehicle system and control method

Abstract

The present disclosure relates to a charging and driving integrated system, a whole vehicle system and a control method. The charging and driving integrated system comprises a first motor driving system, a second motor driving system, an air conditioner compressor system, an alternating current charging port and a controller. Three phase lines of the alternating current charging port are connected to the first motor driving system, the second motor driving system and the air conditioner compressor system respectively. The alternating current charging port, the first motor driving system, the second motor driving system and the air conditioner compressor system are connected to a power battery to form a charging loop. The first motor driving system, the second motor driving system and the air conditioner compressor system are connected to the power battery to form a driving loop. The controller is configured to control the charging and driving integrated system to be in the charging mode or the driving mode.

Description

Technical Field

[0001] This disclosure relates to the field of electronic control technology, specifically to an integrated charging and driving system, a vehicle system, and a control method. Background Technology

[0002] With the increasing popularity of new energy vehicles, the demand for charging is growing. Currently, charging systems for new energy vehicles can be divided into two types: AC charging and DC charging. AC charging uses a 220V single-phase AC power supply from the external power grid to power the battery, which is then charged by an onboard charger. DC charging uses DC power output from ground-based charging stations to charge the onboard battery, resulting in a larger charging current. New energy vehicles need to provide corresponding charging and communication interfaces for both charging methods. Summary of the Invention

[0003] According to a first aspect of the present disclosure, a charging and driving integrated system, a vehicle system, and a control method are provided. The charging and driving integrated system includes a first motor drive system, a second motor drive system, an air conditioning compressor system, an AC charging port, and a controller. The three phase wires of the AC charging port are respectively connected to the first motor drive system, the second motor drive system, and the air conditioning compressor system; The AC charging port, the first motor drive system, the second motor drive system, and the air conditioning compressor system are connected to the power battery to form a charging circuit; The first motor drive system, the second motor drive system, and the air conditioning compressor system are connected to the power battery to form a drive circuit; The controller is configured to control the integrated charging and driving system to be in the charging mode or the driving mode.

[0004] Optionally, the first motor drive system includes a first inverter, the second motor system includes a second inverter, and the air conditioning compressor system includes a third inverter; The first phase line of the AC charging port is connected to the midpoint of the first bridge arm in the first inverter, the second phase line of the AC charging port is connected to the midpoint of the second bridge arm in the second inverter, and the third phase line of the AC charging port is connected to the midpoint of the third bridge arm in the third inverter. One bus terminal of the first inverter, one bus terminal of the second inverter, and one bus terminal of the third inverter are connected, and the other bus terminal of the first inverter, the other bus terminal of the second inverter, and the other bus terminal of the third inverter are connected.

[0005] Optionally, the first motor drive system further includes a first coil, the second motor drive system further includes a second coil, and the air conditioner compressor drive system further includes a third coil; The first coil is connected to the midpoint of the bridge arm of the first inverter, the second coil is connected to the midpoint of the bridge arm of the second inverter, and the third coil is connected to the midpoint of the bridge arm of the third inverter; The controller controls the switching transistors in the first inverter, the second inverter, and the third inverter to enable the current in the first phase line of the AC charging port to flow through the first coil, the current in the second phase line to flow out through the second coil, and then into the third phase line of the AC charging port through the third coil.

[0006] Optionally, it also includes a first inductor, a second inductor, and a third inductor that correspond one-to-one with the first phase line, the second phase line, and the third phase line; The first inductor is disposed on the connection line between the AC charging port and the first inverter, the second inductor is disposed on the connection line between the AC charging port and the second inverter, and the third inductor is disposed on the connection line between the AC charging port and the third inverter. The controller controls the switching of the switching transistors in the first inverter, the second inverter, and the third inverter, so that the current from the AC charging port flows out through any two of the three inductors and the two inverters corresponding to the two inductors, and flows into the AC charging port through the inductors other than the two inductors and the inverters other than the two inverters.

[0007] Optionally, the AC charging port further includes a first neutral line, which is connected to the midpoint of any one of the bridge arms of the first inverter, the second inverter, and the third inverter.

[0008] Optionally, the first motor drive system includes a first motor and a first inverter, the second motor system includes a second motor and a second inverter, and the air conditioning compressor system includes an air conditioning compressor and a third inverter; The first phase line is connected to the neutral point of the coil winding of the first motor, the second phase line is connected to the neutral point of the coil winding of the second motor, and the third phase line is connected to the neutral point of the coil winding of the air conditioner compressor. One bus terminal of the first inverter, one bus terminal of the second inverter, and one bus terminal of the third inverter are connected, and the other bus terminal of the first inverter, the other bus terminal of the second inverter, and the other bus terminal of the third inverter are connected; The center point of each phase of the first inverter is connected to each phase winding of the first motor, the center point of each phase of the second inverter is connected to each phase winding of the second motor, and the center point of each phase of the third inverter is connected to each phase winding of the air conditioner compressor.

[0009] Optionally, the AC charging port further includes a second neutral line, which is connected to the neutral point of the coil winding of any one of the first motor, the second motor, and the air conditioner compressor.

[0010] Optionally, it also includes a DC charging port, which includes a DC positive port and a DC negative port; The DC positive port is connected to the first combiner terminal of the first inverter. The DC negative terminal is connected to the second bus terminal of the second inverter or the second bus terminal of the third inverter.

[0011] Optionally, it also includes a DC / DC module, which includes a DC / AC module, and the DC / AC module includes a first full-bridge switch and a transformer; The first terminal of the first full-bridge switch is connected to the first bus terminal of the first inverter, the first bus terminal of the second inverter, and the first bus terminal of the third inverter. The second terminal of the first full-bridge switch is connected to the second bus terminal of the first inverter, the second bus terminal of the second inverter, and the second bus terminal of the third inverter; The midpoint of the first bridge arm of the first full-bridge switch is connected to the first end of the primary side of the transformer; The midpoint of the second bridge arm of the first full-bridge switch is connected to the second end of the primary side of the transformer.

[0012] Optionally, the DC / DC module further includes a boost DC module, which includes a second full-bridge switch, a fourth inductor, a fifth inductor, and a boost capacitor; The first terminal of the second full-bridge switch is connected to the first terminal of the first full-bridge switch; The second terminal of the second full-bridge switch is connected to the second terminal of the first full-bridge switch; The midpoint of the first bridge arm of the second full-bridge switch is connected to the second end of the secondary side of the transformer, and is connected to the negative terminal of the power battery through the fifth inductor; The midpoint of the second bridge arm of the second full-bridge switch is connected to the first end of the secondary side of the transformer, and is connected to the positive terminal of the power battery through the fourth inductor; The first terminal of the boost capacitor is connected to the fourth inductor and the fifth inductor, and the second terminal of the boost capacitor is connected to the negative terminal of the power battery.

[0013] Optionally, it may also include a first switch, a second switch, and a third switch; The first switch is disposed on the connection line between the first end of the first full-bridge switch and the first end of the second full-bridge switch; The second switch is disposed on the connection line between the second terminal of the first full-bridge switch and the second terminal of the second full-bridge switch; The third switch is located on the connection line between the first end of the secondary side of the transformer and the midpoint of the second bridge arm of the second full-bridge switch; or The third switch is located on the connection line between the second end of the secondary side of the transformer and the midpoint of the first bridge arm of the second full-bridge switch.

[0014] Optionally, the controller is connected to the first motor drive system, the second motor drive system, the air conditioning compressor system, the first full-bridge switch, the second full-bridge switch, the first switch, the second switch, and the third switch. The controller is used to control the on / off state of the first motor drive system, the second motor drive system, the air conditioning compressor system, the first full-bridge switch, and the second full-bridge switch, as well as to control the on / off state of the first switch, the second switch, and the third switch, so that the charging system performs single-phase AC charging, three-phase AC charging, or DC charging in the charging mode; and the charging system drives one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system in the driving mode.

[0015] Optionally, the controller is used to: The first and second switches are controlled to open, and the third switch is controlled to close. The first motor drive system, the second motor drive system, and the air conditioning compressor system are controlled to form a first PFC circuit in the first working mode. This allows the current output from any phase line of the AC charging port to flow sequentially through the inverter corresponding to that phase line, the first terminal of the first full-bridge switch, the primary side of the transformer, and the second terminal of the first full-bridge switch to the neutral line of the AC charging port or the inverter connected to another phase line. This triggers the secondary side of the transformer to generate a current flowing to the fourth inductor and / or the fifth inductor of the second full-bridge switch to perform single-phase AC charging of the power battery.

[0016] Optionally, the controller is further configured to: The first and second switches are controlled to open, and the third switch is controlled to close. The first motor drive system, the second motor drive system, and the air conditioning compressor system are controlled to form a second PFC circuit in the second working mode. This allows the current output from any two phase lines of the AC charging port to flow sequentially through the inverters corresponding to those two phase lines, the first terminal of the first full-bridge switch, the primary side of the transformer, and the second terminal of the first full-bridge switch, into the inverter connected to another phase line other than those two phase lines. This triggers the secondary side of the transformer to generate a current flowing to the fourth inductor and / or the fifth inductor of the second full-bridge switch to perform three-phase AC charging of the power battery.

[0017] Optionally, the controller is further configured to: The first and second switches are controlled to close, and the third switch is controlled to open. The current from the positive DC port flows sequentially through the first motor drive system, the first switch, and the first end of the second full-bridge switch into the second full-bridge switch, and then sequentially through the power battery, the second end of the second full-bridge switch, and the second switch to the negative DC port, so as to form a DC charging circuit in the third working mode.

[0018] Optionally, the controller is further configured to: The system controls the first and second switches to close, controls the third switch to open, and controls the current from the positive terminal of the power battery to flow through the fourth or fifth inductor in the second full-bridge switch to the first switch. The current then flows through the first switch to one of the inverters of one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system, and through the other inverter and the second switch to the negative terminal of the power battery. In drive mode, the power from the power battery drives one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system.

[0019] According to a second aspect of the present disclosure, a vehicle is provided, including a first motor, a second motor, an air conditioning compressor, and the charging and driving integrated system described in the first aspect, wherein the first motor is a motor in the first motor drive system, the second motor is a motor in the second motor drive system, and the air conditioning compressor is included in the air conditioning compressor drive system.

[0020] According to a third aspect of the present disclosure, a control method is provided, applied to the integrated charging and driving system described in the first aspect, comprising: In response to receiving a charging command, the integrated charging and driving system is controlled to enter charging mode to charge the power battery; In response to receiving a drive command, the integrated charging and driving system is controlled to enter drive mode to use the power of the power battery to drive one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system.

[0021] Optionally, the step of controlling the integrated charging and driving system to enter charging mode in response to receiving a charging command, in order to charge the power battery, includes: When the charging command is a single-phase AC charging command, the charging and driving integrated system is controlled to be in the first working mode to perform single-phase AC charging on the power battery. When the charging command is a three-phase AC charging command, the charging and driving integrated system is controlled to operate in the second working mode to perform three-phase AC charging on the power battery. When the charging command is a DC charging command, the integrated charging and driving system is controlled to operate in a third mode to DC charge the power battery.

[0022] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: By controlling the AC charging port, the first motor drive system, the second motor drive system, and the air conditioning compressor system to connect to the power battery, a charging circuit is formed in the charging mode of the integrated charging and driving system to charge the power battery. Furthermore, by controlling the first motor drive system, the second motor drive system, and the air conditioning compressor system to connect to the power battery, a drive circuit is formed in the drive mode of the integrated charging and driving system to drive one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor. Thus, while satisfying versatility, costs can be saved; charging the power battery does not affect the drive and air conditioning functions; and the power battery can drive the vehicle's drive system and air conditioning compressor, making it highly applicable.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] Figure 1 This is a circuit diagram of an integrated charging and driving system provided in an embodiment of this disclosure.

[0026] Figure 2 This is a circuit diagram of a charging circuit provided by existing technology.

[0027] Figure 3 This is a circuit diagram of a driving circuit provided by existing technology.

[0028] Figure 4 This is a circuit diagram of another integrated charging and driving system provided in an embodiment of this disclosure.

[0029] Figure 5 This is a schematic diagram of an AC charging circuit provided in an embodiment of this disclosure.

[0030] Figure 6 This is a schematic diagram of another AC charging circuit provided in an embodiment of this disclosure.

[0031] Figure 7 This is a schematic diagram of a DC charging circuit provided in an embodiment of this disclosure.

[0032] Explanation of reference numerals in the attached figures Detailed Implementation

[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0034] The inventors discovered that, for current new energy vehicles, the charging circuit and drive circuit are typically independent. The charging circuit consists of the battery, onboard charger, and charging / discharging port, while the drive circuit consists of the battery, boost DC power supply, motor, and electronic control unit. Furthermore, the charging and drive operation periods do not overlap, meaning at least one part of the circuit is not working. This results in wasted component performance and increased overall vehicle cost. Developing multiple onboard chargers suitable for different voltage platforms based on voltage range would further increase development costs. Simultaneously, it would reduce the demand for individual products, which in turn would hinder cost reduction for individual products.

[0035] In view of this, this disclosure proposes an integrated charging and driving system, a vehicle system, and a control method to solve the above-mentioned technical problems.

[0036] like Figure 1 As shown, the integrated charging and driving system includes a first motor drive system 101, a second motor drive system 102, an air conditioning compressor system 103, an AC charging port 104, and a controller. The three phase wires of the AC charging port 104 are respectively connected to the first motor drive system 101, the second motor drive system 102 and the air conditioning compressor system 103; AC charging port 104, first motor drive system 101, second motor drive system 102 and air conditioning compressor system 103 are connected to power battery to form a charging circuit; The first motor drive system 101, the second motor drive system 102 and the air conditioning compressor system 103 are connected to the power battery to form a drive circuit; The controller is configured to control the integrated charging and driving system to be in charging mode or driving mode.

[0037] First, it should be understood that the charging circuits in existing technologies, such as Figure 2 As shown, the battery, on-board charger, and charging / discharging port constitute the charging circuit, and the drive circuit is as follows: Figure 3 As shown, the battery, boost DC power supply, motor, and electronic control unit constitute the drive circuit. Because the charging circuit and drive circuit are independent, and the vehicle charging / discharging and driving conditions are mutually exclusive—the vehicle is in a parked state during charging / discharging and the electric motor does not operate; while the vehicle is in motion, the electric motor operates but does not charge / discharge—this results in low component utilization and high costs.

[0038] It should be understood that the integrated charging and driving system provided in this disclosure may include at least two motor drive systems and one air conditioning compressor system. When there are two or more motor drive systems, the integrated charging and driving system can reuse any one of the motor drive systems and the air conditioning compressor system to achieve single-phase charging and discharging, or it can reuse any number of motor drive systems and the air conditioning compressor system to achieve multi-phase charging and discharging. The embodiments of this disclosure do not limit this aspect.

[0039] For example, consider an integrated charging and driving system comprising two motor drive systems and an air conditioning compressor system, such as... Figure 4 As shown, the three phase lines A1, A2 and A3 of the AC charging port 104 are respectively connected to the first motor drive system 101, the second motor drive system 102 and the air conditioning compressor system 103.

[0040] For example, in charging mode, the AC charging port 104, the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103 are connected to the power battery to form a charging circuit, so as to charge the power battery through an external charging device connected to the integrated charging and driving system. In driving mode, the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103 are connected to the power battery to form a driving circuit, so as to drive an external device to be driven connected to the integrated charging and driving system through the power battery.

[0041] The aforementioned integrated charging and drive system connects to the power battery via an AC charging port, a first motor drive system, a second motor drive system, and an air conditioning compressor system. In the charging mode of this integrated system, a charging circuit is formed to charge the power battery. Similarly, in the drive mode, the first motor drive system, the second motor drive system, and the air conditioning compressor system connect to the power battery, forming a drive circuit to drive one or more of these systems. This approach achieves versatility while saving costs, charging the power battery without affecting drive and air conditioning functions, and allowing the power battery to drive the vehicle's drive system and air conditioning compressor, making it highly adaptable.

[0042] In one embodiment, such as Figure 4 As shown, the first motor drive system 101 includes a first inverter 105, the second motor system includes a second inverter 106, and the air conditioning compressor system 103 includes a third inverter 107. The first phase line of AC charging port 104 is connected to the midpoint of the first bridge arm in the first inverter 105, the second phase line of AC charging port 104 is connected to the midpoint of the second bridge arm in the second inverter 106, and the third phase line of AC charging port 104 is connected to the midpoint of the third bridge arm in the third inverter 107. One junction terminal of the first inverter 105, one junction terminal of the second inverter 106, and one junction terminal of the third inverter 107 are connected, and the other junction terminal of the first inverter 105, the other junction terminal of the second inverter 106, and the other junction terminal of the third inverter 107 are connected.

[0043] It should be understood that the first inverter 105, the second inverter 106 and the third inverter 107 can all be three-phase, four-phase or five-phase inverters, and this disclosure does not limit them.

[0044] For example, taking the first inverter 105, the second inverter 106, and the third inverter 107 as three-phase inverters, as follows... Figure 1As shown. The first inverter 105 includes three bridge arms, wherein the first bridge arm consists of the upper bridge arm switch Q1 and the lower bridge arm switch Q2, the second bridge arm consists of the upper bridge arm switch Q3 and the lower bridge arm switch Q4, and the third bridge arm consists of the upper bridge arm switch Q5 and the lower bridge arm switch Q6. The second inverter 106 includes three bridge arms, wherein the first bridge arm consists of the upper bridge arm switch Q7 and the lower bridge arm switch Q8, the second bridge arm consists of the upper bridge arm switch Q9 and the lower bridge arm switch Q10, and the third bridge arm consists of the upper bridge arm switch Q11 and the lower bridge arm switch Q12. The third inverter 107 includes three bridge arms. The first bridge arm consists of the upper bridge arm switch Q13 and the lower bridge arm switch Q14. The second bridge arm consists of the upper bridge arm switch Q15 and the lower bridge arm switch Q16. The third bridge arm consists of the upper bridge arm switch Q17 and the lower bridge arm switch Q18.

[0045] The first bus terminal of the first inverter 105 (i.e., the bridge arm including switch Q1, switch Q3 and switch Q5), the first bus terminal of the second inverter 106 (i.e., the bridge arm including switch Q7, switch Q9 and switch Q11), and the first bus terminal of the third inverter 107 (i.e., the bridge arm including switch Q13, switch Q15 and switch Q17) are connected. The second bus terminal of the first inverter 105 (i.e., the bridge arm including switch Q2, switch Q4 and switch Q6), the second bus terminal of the second inverter 106 (i.e., the bridge arm including switch Q8, switch Q10 and switch Q12), and the second bus terminal of the third inverter 107 (i.e., the bridge arm including switch Q14, switch Q16 and switch Q18) are connected.

[0046] In one embodiment, such as Figure 4 As shown, the first motor drive system 101 further includes a first coil 108, the second motor drive system 102 further includes a second coil 109, and the air conditioner compressor drive system further includes a third coil 110; The first coil 108 is connected to the midpoint of the bridge arm of the first inverter 105, the second coil 109 is connected to the midpoint of the bridge arm of the second inverter 106, and the third coil 110 is connected to the midpoint of the bridge arm of the third inverter 107. The controller controls the switching transistors in the first inverter 105, the second inverter 106, and the third inverter 107 to enable the current of the first phase line of the AC charging port 104 to flow out through the first coil 108, the current of the second phase line to flow out through the second coil 109, and then flow into the third phase line of the AC charging port 104 through the third coil 110.

[0047] It should be understood that the first coil 108, the second coil 109, and the second coil 109 can all be three-phase, four-phase, or five-phase motors (i.e., three, four, or five motor windings are included), and this disclosure does not limit this.

[0048] For example, such as Figure 4 As shown, the first coil 108 consists of three motor windings L1, L2, and L3, with one end of each winding connected together. The midpoint of the first bridge arm of the first inverter 105 is connected to the other end of motor winding L1, the midpoint of the second bridge arm of the first inverter 105 is connected to the other end of motor winding L2, and the midpoint of the third bridge arm of the first inverter 105 is connected to the other end of motor winding L3. The second coil 109 consists of three motor windings L4, L5, and L6, with one end of each winding connected together. The midpoint of the first bridge arm of the second inverter 106 is connected to the other end of motor winding L4, the midpoint of the second bridge arm of the second inverter 106 is connected to the other end of motor winding L5, and the midpoint of the third bridge arm of the second inverter 106 is connected to the other end of motor winding L6. The third coil 110 consists of three motor windings L7, L8 and L9, with one end of each winding connected together. The midpoint of the first bridge arm of the third inverter 107 is connected to the other end of the motor winding L7, the midpoint of the second bridge arm of the third inverter 107 is connected to the other end of the motor winding L8, and the midpoint of the third bridge arm of the third inverter 107 is connected to the other end of the motor winding L9.

[0049] For example, by controlling the on / off state of the switching transistors in the first inverter 105, the second inverter 106, and the third inverter 107, a configuration such as... Figure 5 The AC charging circuit shown is configured as follows: Figure 5 The AC charging circuit shown in the thick lines has the current from the AC charging port 104 input through the first coil 108 of the first motor drive system 101 to AC charge the power battery 117.

[0050] In one embodiment, such as Figure 4 As shown, the integrated charging and driving system also includes a first inductor L20, a second inductor L21, and a third inductor L22, which correspond one-to-one with the first phase line, the second phase line, and the third phase line. The first inductor L20 is installed on the connection line between the AC charging port 104 and the first inverter 105, the second inductor L21 is installed on the connection line between the AC charging port 104 and the second inverter 106, and the third inductor L22 is installed on the connection line between the AC charging port 104 and the third inverter 107. The controller controls the switching of the switching transistors in the first inverter 105, the second inverter 106, and the third inverter 107, so that the current in the AC charging port 104 flows out through any two of the three inductors and the two inverters corresponding to the two inductors, and flows into the AC charging port 104 through the inductors other than the two inductors and the inverters other than the two inverters.

[0051] For example, by controlling the on / off state of the switching transistors in the first inverter 105, the second inverter 106, and the third inverter 107, a configuration such as... Figure 6 The AC charging circuit shown is followed as follows: Figure 6 The AC charging circuit shown by the thick line has the current from the AC charging port 104 input through the first inductor L20 to AC charge the power battery 117.

[0052] It should be understood that when the power battery 117 is charged in single-phase AC, the current of the AC charging port 104 can be input through the coil winding of the first motor or through an external coil. Either method can be selected. This disclosure does not limit the specific method or basis for selection.

[0053] In one embodiment, such as Figure 4 As shown, the AC charging port 104 also includes a first neutral line N, which is connected to the midpoint of any one of the bridge arms of the first inverter 105, the second inverter 106, and the third inverter 107.

[0054] It should be understood that single-phase voltage is generally a form of power transmission consisting of one phase wire (live wire) and one neutral wire, with single-phase voltage being 220V. Three-phase voltage is a power supply composed of three alternating current potentials with the same frequency, equal amplitude, and phases differing by 120°. The three-phase line voltage of a low-voltage power supply line is 380V, while the phase voltage to ground (i.e., connected to the neutral wire) is 220V. In a three-phase circuit, the voltage between any two phase wires is 380V, while the voltage between any phase wire and the neutral wire is 220V. Therefore, in charging mode, the first neutral wire N can be connected to the neutral wire to provide single-phase AC voltage to the power battery 117, or the first neutral wire N can be disconnected from the neutral wire to provide three-phase AC voltage to the power battery 117.

[0055] For example, such as Figure 4As shown, the first neutral line N is connected to the midpoint of the bridge arm of the third inverter 107.

[0056] In one embodiment, such as Figure 4 As shown, the first motor drive system 101 includes a first motor and a first inverter 105, the second motor system includes a second motor and a second inverter 106, and the air conditioning compressor system 103 includes an air conditioning compressor and a third inverter 107. The first phase line is connected to the neutral point of the coil winding of the first motor, the second phase line is connected to the neutral point of the coil winding of the second motor, and the third phase line is connected to the neutral point of the coil winding of the air conditioner compressor. One bus terminal of the first inverter 105, one bus terminal of the second inverter 106, and one bus terminal of the third inverter 107 are connected, and the other bus terminal of the first inverter 105, the other bus terminal of the second inverter 106, and the other bus terminal of the third inverter 107 are connected. The center point of each phase of the first inverter 105 is connected to each phase coil winding of the first motor, the center point of each phase of the second inverter 106 is connected to each phase coil winding of the second motor, and the center point of each phase of the third inverter 107 is connected to each phase coil winding of the air conditioner compressor.

[0057] In one embodiment, such as Figure 4 As shown, the AC charging port 104 also includes a second neutral line, which is connected to the neutral point of the coil winding of any one of the first motor, the second motor, and the air conditioning compressor.

[0058] In one embodiment, such as Figure 4 As shown, the integrated charging and driving system also includes a DC charging port 111, which includes a DC positive port DC+ and a DC negative port DC-. The DC positive port DC+ is connected to the first bus terminal of the first inverter 105; The DC negative terminal (DC-) is connected to the second bus terminal of the second inverter 106 or the second bus terminal of the third inverter 107.

[0059] For example, such as Figure 4 As shown, the DC positive port DC+ can be located on the connection line between the first phase line and the first inductor L20, and the DC negative port DC- can be connected to the second bus terminal (i.e., the bridge arm including Q8, Q10, and Q12) of the second inverter 106. Alternatively, the DC positive port DC+ can also be located on the connection line between any phase line of the AC charging port 104 and the inductor corresponding to that phase line, and the DC negative port DC- can be connected to the second bus terminal of any inverter connected to any other phase line besides the one corresponding to that phase line. This embodiment of the present disclosure does not limit this.

[0060] In one embodiment, such as Figure 4 As shown, the integrated charging and driving system also includes a DC / DC module 112, which includes a DC / AC module 113, which includes a first full-bridge switch 114 and a transformer T80. The first terminal of the first full-bridge switch 114 is connected to the first bus terminal of the first inverter 105, the first bus terminal of the second inverter 106, and the first bus terminal of the third inverter 107. The second terminal of the first full-bridge switch 114 is connected to the second bus terminal of the first inverter 105, the second bus terminal of the second inverter 106, and the second bus terminal of the third inverter 107. The midpoint of the first bridge arm of the first full-bridge switch 114 is connected to the first end of the primary side of the transformer T80; The midpoint of the second bridge arm of the first full-bridge switch 114 is connected to the second end of the primary side of the transformer T80.

[0061] For example, such as Figure 4 As shown, the first full-bridge switch 114 is composed of switching transistors Q19, Q20, Q21, and Q22. The first end of the first full-bridge switch 114 (i.e., the bridge arm including switching transistors Q19 and Q21) is connected to the first bus terminal of both the first inverter 105 and the second inverter 106. The second end of the first full-bridge switch 114 (i.e., the bridge arm including switching transistors Q20 and Q22) is connected to the second bus terminal of both the first inverter 105 and the second inverter 106. The midpoint of the first bridge arm of the first full-bridge switch 114 (i.e., the bridge arm including switching transistors Q19 and Q20) is connected to the first end of the primary winding of transformer T80, and the midpoint of the second bridge arm of the first full-bridge switch 114 (i.e., the bridge arm including switching transistors Q21 and Q22) is connected to the second end of the primary winding of transformer T80.

[0062] In one embodiment, such as Figure 4 As shown, the integrated charging and driving system includes a DC / DC module 112 that further includes a boost DC module 115. The boost DC module 115 includes a second full-bridge switch 116, a fourth inductor L10, a fifth inductor L11, and a boost capacitor C2. The first terminal of the second full-bridge switch 116 is connected to the first terminal of the first full-bridge switch 114; The second terminal of the second full-bridge switch 116 is connected to the second terminal of the first full-bridge switch 114; The midpoint of the first bridge arm of the second full-bridge switch 116 is connected to the second end of the secondary side of the transformer T80, and is connected to the negative terminal of the power battery 117 through the fifth inductor L11. The midpoint of the second bridge arm of the second full-bridge switch 116 is connected to the first end of the secondary side of the transformer T80, and is connected to the positive terminal of the power battery 117 through the fourth inductor L10. The first terminal of the boost capacitor C2 is connected to the fourth inductor L10 and the fifth inductor L11, and the second terminal of the boost capacitor C2 is connected to the negative terminal of the power battery 117.

[0063] For example, such as Figure 4 As shown, the second full-bridge switch 116 is composed of switching transistors Q23, Q24, Q25, and Q26. The first end of the second full-bridge switch 116 (i.e., the connection end of switching transistors Q23 and Q25) is connected to the first end of the first full-bridge switch 114, and the second end of the second full-bridge switch 116 (i.e., the connection end of switching transistors Q24 and Q26) is connected to the second end of the first full-bridge switch 114. The first bridge arm of the second full-bridge switch 116 (i.e., the bridge arm including switching transistors Q23 and Q24) is connected to the second end of the secondary side of the transformer T80, and the second bridge arm of the second full-bridge switch 116 (i.e., the bridge arm including switching transistors Q25 and Q26) is connected to the first end of the secondary side of the transformer T80.

[0064] In one embodiment, such as Figure 4 As shown, the integrated charging and driving system also includes a first switch SPST1, a second switch SPST2, and a third switch SPST3; The first switch SPST1 is installed on the connection line between the first terminal of the first full-bridge switch 114 and the first terminal of the second full-bridge switch 116; The second switch SPST2 is installed on the connection line between the second terminal of the first full-bridge switch 114 and the second terminal of the second full-bridge switch 116; The third switch SPST3 is installed on the connection line between the first end of the secondary side of transformer T80 and the midpoint of the second bridge arm of the second full-bridge switch 116; or The third switch SPST3 is located on the connection line between the second end of the secondary side of transformer T80 and the midpoint of the first bridge arm of the second full-bridge switch 116.

[0065] In one embodiment, such as Figure 4As shown, the integrated charging and driving system has a controller connected to the first motor drive system 101, the second motor drive system 102, the air conditioning compressor system 103, the first full-bridge switch 114, the second full-bridge switch 116, the first switch SPST1, the second switch SPST2, and the third switch SPST3. The controller controls the on / off state of the first motor drive system 101, the second motor drive system 102, the air conditioning compressor system 103, the first full-bridge switch 114, and the second full-bridge switch 116, as well as the on / off state of the first switch SPST1, the second switch SPST2, and the third switch SPST3. In charging mode, the charging system performs single-phase AC charging, three-phase AC charging, or DC charging. In driving mode, the charging system drives one or more of the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103.

[0066] It should be understood that when one or more of the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103 are driven by the power battery 117, the voltage provided by the power battery 117 can also be adjusted by the DC / DC module 112 according to the drive voltage required by one or more of the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103.

[0067] In one embodiment, the controller is used to: The first switch SPST1 and the second switch SPST2 are opened, and the third switch SPST3 is closed. The first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103 are controlled to form a first PFC circuit in the first working mode. This allows the current output from any phase line of the AC charging port 104 to flow sequentially through the inverter corresponding to that phase line, the first terminal of the first full-bridge switch 114, the primary side of the transformer T80, and the second terminal of the first full-bridge switch 114 to the neutral line of the AC charging port 104 or the inverter connected to another phase line. This triggers the secondary side of the transformer T80 to generate a current flowing to the fourth inductor L10 and / or the fifth inductor L11 of the second full-bridge switch 116 to perform single-phase AC charging of the power battery 117.

[0068] It should be understood that the controller is connected to each of the switching transistors in the first inverter 105 of the first motor drive system 101, the second inverter 106 of the second motor drive system 102, and the third inverter 107 of the air conditioning compressor system 103, and is also connected to each of the motor windings in the first inductor L20, the first coil 108, and the second coil 109. The controller controls the switching transistors in the first inverter 105, the second inverter 106, and the third inverter 107 to control the first inverter 105 and the second inverter 106 to form a first PFC circuit in the first operating mode of the charging system.

[0069] For example, such as Figure 4 As shown, in the first operating mode, the AC charging and discharging interface is connected to an external charging device. The first arm of the first inverter 105 can be reused to form a first PFC sub-circuit, and the first arm of the second inverter 106 can be reused to form a second PFC sub-circuit, providing single-phase AC power to the power battery 117. Of course, any one arm of the first inverter 105 can be reused to form the first PFC sub-circuit, and any one arm of the second inverter 106 can be reused to form the second PFC sub-circuit; this embodiment does not limit this.

[0070] During vehicle charging, the states of each switching element are shown in Table 1. Switches Q1 and Q2 of the first inverter 105 and Q7 and Q8 of the second inverter 106 are switched on / off according to PFC operating logic. Switches Q1 and Q2 act as fast transistors, while Q7 and Q8 act as slow transistors, enabling current return. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113, the transformer T80, and switches Q24 and Q26 of the boost DC module 115, along with inductors L10 and L11, form a DC / AC circuit to provide a stable voltage to the battery, thereby enabling single-phase AC charging and discharging of the power battery 117. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0071] Table 1

[0072] When the vehicle is in motion, the states of each switching element are shown in Table 2. The second switch SPST2 and the third switch SPST3 are closed, and the fourth switch SPST4 is open. Switches Q1, Q2, Q3, Q4, Q5, and Q6 of the first inverter 105, and switches Q7, Q8, Q9, Q10, Q11, and Q12 of the second inverter 106 operate according to the motor control logic. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113 are all closed. Switches Q23, Q24, Q25, and Q26 of the boost DC module 115 operate according to the boost DC logic. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0073] Table 2

[0074] For example, such as Figure 4 As shown, the second and third arms of the first inverter 105 can be reused to form a first PFC sub-circuit, and the second and third arms of the second inverter 106 can be reused to form a second PFC sub-circuit to provide single-phase AC power to the power battery 117. Of course, any two arms of the first inverter 105 can also be reused to form a first PFC sub-circuit, and any two arms of the second inverter 106 can be reused to form a second PFC sub-circuit; this embodiment of the present disclosure does not limit this.

[0075] The states of each switching element during vehicle charging are shown in Table 3. Switches Q3, Q4, Q5, and Q6 of the first inverter 105 and Q9, Q10, Q11, and Q12 of the second inverter 106 are switched on / off according to PFC operating logic. Switches Q3, Q4, Q5, and Q6 act as fast transistors, forming an interleaved parallel structure, while switches Q9, Q10, Q11, and Q12 act as slow transistors, operating in parallel to achieve current return. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113, the transformer T80, and switches Q24, Q26, inductors L10 and L11 of the boost DC module 115 form a DC / DC circuit, providing a stable voltage to the battery, thereby enabling single-phase AC charging of the power battery 117. The air conditioning compressor system 103 can determine whether it is working based on its own needs.

[0076] Table 3

[0077] When the vehicle is in motion, the states of each switching element are shown in Table 4. The second switch SPST2 and the third switch SPST3 are closed, and the fourth switch SPST4 is open. Switches Q1, Q2, Q3, Q4, Q5, and Q6 of the first inverter 105, and switches Q7, Q8, Q9, Q10, Q11, and Q12 of the second inverter 106 operate according to the motor control logic. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113 are all closed. Switches Q23, Q24, Q25, and Q26 of the boost DC module 115 operate according to the boost DC logic. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0078] Table 4

[0079] In one embodiment, such as Figure 4 As shown, the controller is also used for: The first switch SPST1 and the second switch SPST2 are opened, and the third switch SPST3 is closed. The first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103 are controlled to form a second PFC circuit. This allows the current output from any two phase lines of the AC charging port 104 to flow sequentially through the inverters corresponding to those two phase lines, the first terminal of the first full-bridge switch 114, the primary side of the transformer T80, and the second terminal of the first full-bridge switch 114, into the inverter connected to another phase line other than those two phase lines. This triggers the secondary side of the transformer T80 to generate current flowing to the fourth inductor L10 and / or the fifth inductor L11 of the second full-bridge switch 116 to perform three-phase AC charging of the power battery 117.

[0080] For example, such as Figure 4 As shown, in the second operating mode, the AC charging and discharging interface is connected to an external charging device. The second PFC circuit may include a first PFC sub-circuit, a second PFC sub-circuit, and a third PFC sub-circuit. Specifically, the first bridge arm of the first inverter 105 can be reused to form the first PFC sub-circuit, the first bridge arm of the second inverter 106 can be reused to form the second PFC sub-circuit, and the first bridge arm of the third inverter 107 can be reused to form the third PFC sub-circuit, so as to provide three-phase AC power to the power battery 117. Of course, any one bridge arm of the first inverter 105 can also be reused to form the first PFC sub-circuit, any one bridge arm of the second inverter 106 can be reused to form the second PFC sub-circuit, and any one bridge arm of the third inverter 107 can be reused to form the third PFC sub-circuit. This embodiment of the present disclosure does not limit this.

[0081] During vehicle charging, the states of each switching element are shown in Table 5. Switches Q1 and Q2 of the first inverter 105, Q7 and Q8 of the second inverter 106, and switch Q13 and switch Q14 of the second inverter 106 operate under PFC logic, with switches Q1 and Q2 acting as fast transistors and Q7 and Q8 as slow transistors, enabling current return. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113, transformer T80, switches Q24 and Q26 of the boost DC module 115, and inductors L10 and L11 form a DC / DC circuit, providing a stable voltage to the battery, thereby enabling single-phase AC charging of the power battery 117.

[0082] Table 5

[0083] When the vehicle is in motion, the states of each switching element are shown in Table 6. The second switch SPST2 and the third switch SPST3 are closed, and the fourth switch SPST4 is open. Switches Q1, Q2, Q3, Q4, Q5, and Q6 of the first inverter 105, and switches Q7, Q8, Q9, Q10, Q11, and Q12 of the second inverter 106 operate according to the motor control logic. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113 are all closed. Switches Q23, Q24, Q25, and Q26 of the boost DC module 115 operate according to the boost DC logic. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0084] Table 6

[0085] For example, such as Figure 4 As shown, in the second operating mode, the second and third arms of the first inverter 105 can be reused to form a first PFC sub-circuit, the second and third arms of the second inverter 106 can be reused to form a second PFC sub-circuit, and the second and third arms of the third inverter 107 can be reused to form a third PFC sub-circuit, providing three AC power to the power battery 117. Of course, any two arms of the first inverter 105 can also be reused to form the first PFC sub-circuit, any two arms of the second inverter 106 can be reused to form the second PFC sub-circuit, and any two arms of the third inverter 107 can be reused to form the third PFC sub-circuit; this embodiment does not limit this.

[0086] During vehicle charging, the states of each switching element are shown in Table 7. Switches Q3, Q4, Q5, and Q6 of the first inverter 105, Q9, Q10, Q11, and Q12 of the second inverter 106, and Q15, Q16, Q17, and Q18 of the third inverter 107 are switched on / off according to PFC operating logic. Specifically, switches Q3, Q4, Q5, and Q6 are fast transistors, forming an interleaved parallel structure, while switches Q9, Q10, Q11, and Q12 are slow transistors, operating in parallel to achieve current return. The DC / AC module 113, consisting of switching transistors Q19, Q20, Q21, and Q22, transformer T80, and the boost DC module 115, along with its switching transistors Q24 and Q26, inductors L10 and L11, forms a DC / DC circuit to provide a stable voltage to the battery, thereby enabling single-phase AC charging of the power battery 117. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0087] Table 7

[0088] When the vehicle is in motion, the states of each switching element are shown in Table 8. The second switch SPST2 and the third switch SPST3 are closed, and the fourth switch SPST4 is open. Switches Q1, Q2, Q3, Q4, Q5, and Q6 of the first inverter 105, and switches Q7, Q8, Q9, Q10, Q11, and Q12 of the second inverter 106 operate according to the motor control logic. Switches Q19, Q20, Q21, and Q22 of the DC / AC module 113 are all closed. Switches Q23, Q24, Q25, and Q26 of the boost DC module 115 operate according to the boost DC logic. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0089] Table 8

[0090] In one embodiment, such as Figure 4 As shown, in the integrated charging and driving system, the controller is also used for: The first switch SPST1 and the second switch SPST2 are closed, and the third switch SPST3 is opened. The current from the positive DC port DC+ flows sequentially through the first motor drive system 101, the first switch SPST1, and the first terminal of the second full-bridge switch 116 into the second full-bridge switch 116. It then flows sequentially through the power battery 117, the second terminal of the second full-bridge switch 116, and the second switch SPST2 to the negative DC port DC-, thus forming a DC charging circuit in the third working mode.

[0091] For example, by controlling the switching transistors in the first inverter 105, the second inverter 106, and the third inverter 107, as well as the on / off states of the first switch SPST1 and the second switch SPST2, a configuration can be formed as shown below. Figure 7 The DC charging circuit shown is configured as follows: Figure 7 The DC charging circuit shown by the thick line charges the power battery 117 using DC.

[0092] For example, such as Figure 4 As shown, in the third operating mode, the first inverter 105 and the second inverter 106 can be reused to directly connect the vehicle's DC charging and discharging interface with the DC / AC module 113 to DC charge the battery pack 104.

[0093] When the vehicle is charging, the states of each switching element are shown in Table 9. Switch Q1 of the first inverter 105 is closed, and all other switches are open. Switches SPST2 and SPST4 are closed, while switch SPST4 is open. Switches Q23, Q24, Q25, and Q26 of the boost DC module 115 are switched on and off according to boost DC logic to achieve DC charging of the battery. The air conditioning compressor system 103 can determine whether to operate based on its own needs.

[0094] Table 9

[0095] When the vehicle is in motion, the states of each switching element are shown in Table 10. With the second switch SPST2 closed and the fourth switch SPST4 open, the switches Q1, Q2, Q3, Q4, Q5, and Q6 of the first inverter 105, and Q7, Q8, Q9, Q10, Q11, and Q12 of the second inverter 106, operate according to the motor control logic. The switches Q23, Q24, Q25, and Q26 of the boost DC module 115 operate according to the boost DC logic. The air conditioning compressor can determine whether to operate based on its own needs.

[0096] Table 10

[0097] In one embodiment, such as Figure 4 As shown, in the integrated charging and driving system, the controller is also used for: The system controls the first switch SPST1 and the second switch SPST2 to close, controls the third switch SPST3 to open, and controls the current from the positive terminal of the power battery 117 to flow through the fourth inductor L10 or the fifth inductor L11 in the second full-bridge switch 116 to the first switch SPST1. The current then flows through the first switch SPST1 to one of the inverters of one or more of the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103, and flows through the other inverter and the second switch SPST2 to the negative terminal of the power battery 117. In drive mode, the power battery 117 is used to drive one or more of the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103.

[0098] This disclosure also provides a vehicle including a first motor, a second motor, an air conditioning compressor, and an integrated charging and driving system of any of the above, wherein the first motor is a motor in a first motor drive system 101, the second motor is a motor in a second motor drive system 102, and the air conditioning compressor is included in the air conditioning compressor drive system.

[0099] This disclosure also provides a control method applied to the above-mentioned integrated charging and driving system, the control method comprising: In response to receiving a charging command, the integrated charging and driving system is put into charging mode to charge the power battery; In response to receiving a drive command, the integrated charging and drive system is controlled to enter drive mode to use the power of the power battery to drive one or more of the first motor drive system 101, the second motor drive system 102, and the air conditioning compressor system 103.

[0100] For example, in response to a detected charging or driving command, all switches of the first inverter 105, the second inverter 106, the third inverter 107, and the DC / DC module 112, as well as the on / off states of the first switch SPST1, the second switch SPST2, and the third switch SPST3, can be controlled to control the charging system to be in charging mode or driving mode of the integrated charging and driving system. This disclosure does not limit the method of command detection, judgment, or specific method of entering a certain operating mode.

[0101] In one possible manner, in response to receiving a charging command, controlling the integrated charging and driving system to be in charging mode to charge the power battery can be, in the case that the charging command is a single-phase AC charging command, controlling the integrated charging and driving system to be in a first working mode to charge the power battery in single-phase AC mode. For example, in response to a detected charging command, all switches of the first inverter 105, the second inverter 106, the third inverter 107, and the DC / DC module 112, as well as the on / off states of the first switch SPST1, the second switch SPST2, and the third switch SPST3, can be controlled to control the charging system to be in any of the first, second, and third operating modes. This disclosure does not limit the method of detecting or determining the charging command, or the specific method of entering a particular operating mode.

[0102] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0103] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0104] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A charging and driving integrated system, characterized in that, It includes a first motor drive system, a second motor drive system, an air conditioning compressor system, an AC charging port, and a controller; The three phase wires of the AC charging port are respectively connected to the first motor drive system, the second motor drive system, and the air conditioning compressor system; The AC charging port, the first motor drive system, the second motor drive system, and the air conditioning compressor system are connected to the power battery to form a charging circuit; The first motor drive system, the second motor drive system, and the air conditioning compressor system are connected to the power battery to form a drive circuit; The controller is configured to: In response to receiving a charging command, if the charging command is a single-phase AC charging command, the charging and driving integrated system is controlled to enter a first working mode to perform single-phase AC charging on the power battery. When the charging command is a three-phase AC charging command, the charging and driving integrated system is controlled to operate in the second working mode to perform three-phase AC charging on the power battery. When the charging command is a DC charging command, the charging and driving integrated system is controlled to enter the third working mode to DC charge the power battery; In response to receiving a drive command, the integrated charging and driving system is controlled to enter drive mode to use the power of the power battery to drive one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system.

2. The integrated charging and driving system according to claim 1, characterized in that, The first motor drive system includes a first inverter, the second motor system includes a second inverter, and the air conditioning compressor system includes a third inverter; The first phase line of the AC charging port is connected to the midpoint of the first bridge arm in the first inverter, the second phase line of the AC charging port is connected to the midpoint of the second bridge arm in the second inverter, and the third phase line of the AC charging port is connected to the midpoint of the third bridge arm in the third inverter. One bus terminal of the first inverter, one bus terminal of the second inverter, and one bus terminal of the third inverter are connected, and the other bus terminal of the first inverter, the other bus terminal of the second inverter, and the other bus terminal of the third inverter are connected.

3. The integrated charging and driving system according to claim 2, characterized in that, The first motor drive system further includes a first coil, the second motor drive system further includes a second coil, and the air conditioner compressor drive system further includes a third coil; The first coil is connected to the midpoint of the bridge arm of the first inverter, the second coil is connected to the midpoint of the bridge arm of the second inverter, and the third coil is connected to the midpoint of the bridge arm of the third inverter; The controller controls the switching transistors in the first inverter, the second inverter, and the third inverter to enable the current in the first phase line of the AC charging port to flow through the first coil, the current in the second phase line to flow out through the second coil, and then into the third phase line of the AC charging port through the third coil.

4. The integrated charging and driving system according to claim 2, characterized in that, It also includes a first inductor, a second inductor, and a third inductor that correspond one-to-one with the first phase line, the second phase line, and the third phase line; The first inductor is disposed on the connection line between the AC charging port and the first inverter, the second inductor is disposed on the connection line between the AC charging port and the second inverter, and the third inductor is disposed on the connection line between the AC charging port and the third inverter. The controller controls the switching of the switching transistors in the first inverter, the second inverter, and the third inverter, so that the current from the AC charging port flows out through any two of the three inductors and the two inverters corresponding to the two inductors, and flows into the AC charging port through the inductors other than the two inductors and the inverters other than the two inverters.

5. The integrated charging and driving system according to claim 2, characterized in that, The AC charging port also includes a first neutral line, which is connected to the midpoint of any one of the bridge arms of the first inverter, the second inverter, and the third inverter.

6. The integrated charging and driving system according to claim 1, characterized in that, The first motor drive system includes a first motor and a first inverter; the second motor system includes a second motor and a second inverter; and the air conditioning compressor system includes an air conditioning compressor and a third inverter. The first phase line of the AC charging port is connected to the neutral point of the coil winding of the first motor, the second phase line of the AC charging port is connected to the neutral point of the coil winding of the second motor, and the third phase line of the AC charging port is connected to the neutral point of the coil winding of the air conditioner compressor. One bus terminal of the first inverter, one bus terminal of the second inverter, and one bus terminal of the third inverter are connected, and the other bus terminal of the first inverter, the other bus terminal of the second inverter, and the other bus terminal of the third inverter are connected; The center point of each phase of the first inverter is connected to each phase winding of the first motor, the center point of each phase of the second inverter is connected to each phase winding of the second motor, and the center point of each phase of the third inverter is connected to each phase winding of the air conditioner compressor.

7. The integrated charging and driving system according to claim 6, characterized in that, The AC charging port also includes a second neutral line, which is connected to the neutral point of the coil winding of any one of the first motor, the second motor, and the air conditioner compressor.

8. The integrated charging and driving system according to claim 2, characterized in that, It also includes a DC charging port, which includes a DC positive port and a DC negative port; The DC positive port is connected to the first combiner terminal of the first inverter. The DC negative terminal is connected to the second bus terminal of the second inverter or the second bus terminal of the third inverter.

9. The charging and driving integrated system according to any one of claims 2-8, characterized in that, It also includes a DC / DC module, which includes a DC / AC module, and the DC / AC module includes a first full-bridge switch and a transformer; The first terminal of the first full-bridge switch is connected to the first bus terminal of the first inverter, the first bus terminal of the second inverter, and the first bus terminal of the third inverter. The second terminal of the first full-bridge switch is connected to the second bus terminal of the first inverter, the second bus terminal of the second inverter, and the second bus terminal of the third inverter; The midpoint of the first bridge arm of the first full-bridge switch is connected to the first end of the primary side of the transformer; The midpoint of the second bridge arm of the first full-bridge switch is connected to the second end of the primary side of the transformer.

10. The integrated charging and driving system according to claim 9, characterized in that, The DC / DC module also includes a boost DC module, which includes a second full-bridge switch, a fourth inductor, a fifth inductor, and a boost capacitor. The first terminal of the second full-bridge switch is connected to the first terminal of the first full-bridge switch; The second terminal of the second full-bridge switch is connected to the second terminal of the first full-bridge switch; The midpoint of the first bridge arm of the second full-bridge switch is connected to the second end of the secondary side of the transformer, and is connected to the negative terminal of the power battery through the fifth inductor; The midpoint of the second bridge arm of the second full-bridge switch is connected to the first end of the secondary side of the transformer, and is connected to the positive terminal of the power battery through the fourth inductor; The first terminal of the boost capacitor is connected to the fourth inductor and the fifth inductor, and the second terminal of the boost capacitor is connected to the negative terminal of the power battery.

11. The integrated charging and driving system according to claim 10, characterized in that, It also includes a first switch, a second switch, and a third switch; The first switch is disposed on the connection line between the first end of the first full-bridge switch and the first end of the second full-bridge switch; The second switch is disposed on the connection line between the second terminal of the first full-bridge switch and the second terminal of the second full-bridge switch; The third switch is located on the connection line between the first end of the secondary side of the transformer and the midpoint of the second bridge arm of the second full-bridge switch. or The third switch is located on the connection line between the second end of the secondary side of the transformer and the midpoint of the first bridge arm of the second full-bridge switch.

12. The integrated charging and driving system according to claim 11, characterized in that, The controller is connected to the first motor drive system, the second motor drive system, the air conditioning compressor system, the first full-bridge switch, the second full-bridge switch, the first switch, the second switch, and the third switch. The controller is used to control the on / off state of the first motor drive system, the second motor drive system, the air conditioning compressor system, the first full-bridge switch, and the second full-bridge switch, as well as to control the on / off state of the first switch, the second switch, and the third switch, so that the charging system performs single-phase AC charging, three-phase AC charging, or DC charging in the charging mode; and the charging system drives one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system in the driving mode.

13. The integrated charging and driving system according to claim 12, characterized in that, The controller is used for: The first and second switches are controlled to open, and the third switch is controlled to close. The first motor drive system, the second motor drive system, and the air conditioning compressor system are controlled to form a first PFC circuit in the first working mode. This allows the current output from any phase line of the AC charging port to flow sequentially through the inverter corresponding to that phase line, the first terminal of the first full-bridge switch, the primary side of the transformer, and the second terminal of the first full-bridge switch to the neutral line of the AC charging port or the inverter connected to another phase line. This triggers the secondary side of the transformer to generate a current flowing to the fourth inductor and / or the fifth inductor of the second full-bridge switch to perform single-phase AC charging of the power battery.

14. The integrated charging and driving system according to claim 12, characterized in that, The controller is also used for: The first and second switches are controlled to open, and the third switch is controlled to close. The first motor drive system, the second motor drive system, and the air conditioning compressor system are controlled to form a second PFC circuit in the second working mode. This allows the current output from any two phase lines of the AC charging port to flow sequentially through the inverters corresponding to those two phase lines, the first terminal of the first full-bridge switch, the primary side of the transformer, and the second terminal of the first full-bridge switch, into the inverter connected to another phase line other than those two phase lines. This triggers the secondary side of the transformer to generate a current flowing to the fourth inductor and / or the fifth inductor of the second full-bridge switch to perform three-phase AC charging of the power battery.

15. The integrated charging and driving system according to claim 12, characterized in that, The controller is also used for: The first and second switches are controlled to close, and the third switch is controlled to open. The current from the positive DC port flows sequentially through the first motor drive system, the first switch, and the first end of the second full-bridge switch into the second full-bridge switch, and then sequentially through the power battery, the second end of the second full-bridge switch, and the second switch to the negative DC port, so as to form a DC charging circuit in the third working mode.

16. The integrated charging and driving system according to claim 12, characterized in that, The controller is also used for: The system controls the first and second switches to close, controls the third switch to open, and controls the current from the positive terminal of the power battery to flow through the fourth or fifth inductor in the second full-bridge switch to the first switch. The current then flows through the first switch to one of the inverters of one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system, and through the other inverter and the second switch to the negative terminal of the power battery. In drive mode, the power from the power battery drives one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system.

17. A vehicle, characterized in that, The system includes a first motor, a second motor, an air conditioning compressor, and an integrated charging and driving system according to any one of claims 1-16, wherein the first motor is a motor in the first motor drive system, the second motor is a motor in the second motor drive system, and the air conditioning compressor is included in the air conditioning compressor drive system.

18. A control method for an integrated charging and driving system according to any one of claims 1-16, characterized in that, include: In response to receiving a charging command, the integrated charging and driving system is controlled to enter charging mode to charge the power battery; In response to receiving a drive command, the integrated charging and driving system is controlled to enter drive mode to use the power of the power battery to drive one or more of the first motor drive system, the second motor drive system, and the air conditioning compressor system.

19. The control method according to claim 18, characterized in that, The step of responding to receiving a charging command and controlling the integrated charging and driving system to enter charging mode to charge the power battery includes: When the charging command is a single-phase AC charging command, the charging and driving integrated system is controlled to be in the first working mode to perform single-phase AC charging on the power battery. When the charging command is a three-phase AC charging command, the charging and driving integrated system is controlled to operate in the second working mode to perform three-phase AC charging on the power battery. When the charging command is a DC charging command, the integrated charging and driving system is controlled to operate in a third mode to DC charge the power battery.

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