Vehicle-mounted charging circuit, motor driving circuit, circuit system and vehicle

Abstract

The utility model relates to a vehicle-mounted charging circuit, a motor driving circuit, a circuit system and a vehicle, in the vehicle-mounted charging circuit, the vehicle-mounted charging circuit comprises a plurality of controlled switches, voltage input by an external power supply is adjusted by the controlled switches to serve as charging voltage required by vehicle charging, and the controlled switches are configured as driving switches of a motor of the vehicle. According to the technical scheme, the controlled switch of the vehicle-mounted charging circuit is configured to be the driving switch of the motor of the vehicle, so that the vehicle-mounted charging circuit multiplexes an original motor driving circuit, the effect of reducing the complexity of the vehicle-mounted charging circuit of the vehicle is achieved, and the integration level of a circuit system of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a vehicle-mounted charging circuit, a motor drive circuit, a circuit system, and a vehicle. Background Art

[0002] OBC (On-Board Charger) is a charger installed on electric vehicles. It has the ability to safely and automatically charge the electric vehicle's power battery. Based on the data provided by the BMS (Battery Management System), the charger can dynamically adjust the charging current or voltage parameters and perform corresponding actions to complete the charging process.

[0003] The vehicle will be equipped with a motor drive circuit. As the circuit requirements on the vehicle increase, the number of integrated circuit components on the vehicle will also increase. For vehicles with limited assembly space on the vehicle, the difficulty of configuring the entire vehicle circuit is increased. Utility Model Content

[0004] The embodiments of the present application provide an on-board charging circuit, a motor drive circuit, a circuit system, and a vehicle, which improve component reuse in the vehicle's circuit system and reduce the complexity of the vehicle's circuit system, thereby at least partially solving the above-mentioned technical problems.

[0005] In order to achieve the above objectives, according to a first aspect of the present application, there is provided a vehicle-mounted charging circuit, comprising:

[0006] A plurality of controlled switches for adjusting the voltage of the external power input to the charging voltage required for charging the vehicle;

[0007] Wherein, the controlled switch is configured as a drive switch of a motor of the vehicle.

[0008] Optionally, the motor includes at least one of a drive motor and a generator motor.

[0009] Optionally, the controlled switch is configured as a drive switch of the drive motor or the generator motor.

[0010] Optionally, the vehicle-mounted charging circuit further includes:

[0011] A voltage conversion circuit is used to convert voltage;

[0012] an input circuit, configured to electrically connect the voltage conversion circuit to an external power source;

[0013] Wherein, the input circuit includes:

[0014] The first type of controlled switch is used to control the electrical connection between the external power supply and the voltage conversion circuit.

[0015] Optionally, the first type of controlled switch is configured as a drive switch of one of a generator motor and a drive motor of the vehicle.

[0016] Optionally, the input circuit further includes:

[0017] a plurality of bridge arms electrically connected to an external power source and arranged in parallel with each other, each bridge arm being configured with two first-type controlled switches;

[0018] The voltage conversion circuit comprises:

[0019] a first primary side connection terminal and a second primary side connection terminal;

[0020] The bridge arm has a first intermediate bridge point, and the first intermediate bridge point is located between two first-type controlled switches in the same bridge arm;

[0021] The first primary side connection end and the second primary side connection end are respectively connected to different first intermediate bridge points.

[0022] Optionally, the vehicle-mounted charging circuit further includes:

[0023] Output circuit, including:

[0024] The second type of controlled switch is used to control the charging voltage required for vehicle charging output by the output circuit.

[0025] Optionally, the second type of controlled switch is configured as a drive switch of the other of the generator motor and the drive motor of the vehicle.

[0026] Optionally, the output circuit further includes:

[0027] a plurality of bridge arms electrically connected to the power battery of the vehicle and arranged in parallel with each other, each bridge arm being configured with at least two second-type controlled switches;

[0028] The voltage conversion circuit comprises:

[0029] a first secondary side connection terminal and a second secondary side connection terminal;

[0030] The bridge arm has a second intermediate bridge point, and the second intermediate bridge point is located between two second-type controlled switches in the same bridge arm;

[0031] The first secondary side connection end and the second secondary side connection end are respectively connected to different second intermediate bridge points.

[0032] Optionally, the first middle bridge point of one of the bridge arms of the input circuit is configured to be electrically connected to an external power source to form a freewheeling loop.

[0033] Optionally, the vehicle-mounted charging circuit further includes:

[0034] The unidirectional conducting unit is arranged in parallel with the controlled switch.

[0035] Optionally, the voltage conversion circuit is configured as a coil assembly, so that the voltage conversion circuit is configured as inductive coupling.

[0036] Optionally, the vehicle-mounted charging circuit further includes:

[0037] The transformer switch is used to control the electrical connection between the transformer circuit and the input circuit and the output circuit.

[0038] Optionally, the vehicle-mounted charging circuit further includes:

[0039] a DC EMI circuit, for adjusting the charging voltage when the vehicle is charging;

[0040] The DC EMI circuit is electrically connected to the external power supply and the power battery of the vehicle respectively.

[0041] According to a second aspect of the present application, a motor drive circuit is provided, comprising:

[0042] A drive switch is used to adjust the vehicle's power battery output to the drive voltage required by the motor;

[0043] Wherein, the driving switch is applied to the vehicle-mounted charging circuit.

[0044] Optionally, the motor drive circuit further includes:

[0045] a first drive circuit configured to be electrically connected to one of the drive motor and the generator motor;

[0046] a second drive circuit configured to be electrically connected to the other of the drive motor and the generator motor;

[0047] Also includes:

[0048] an interlock switch, configured to electrically connect the first drive circuit and the second drive circuit;

[0049] Wherein, when the interlock switch is in a closed state, the first drive circuit and the second drive circuit are electrically connected;

[0050] The input circuit is applied to one of the first drive circuit and the second drive circuit, and the output circuit is applied to the other of the first drive circuit and the second drive circuit.

[0051] According to a third aspect of the present application, a circuit system is provided, comprising: the vehicle-mounted charging circuit as described above.

[0052] Optionally, the circuit system further includes:

[0053] External power switch, used to control the electrical connection between the external power supply and the vehicle charging power supply;

[0054] The external power switch is electrically connected to one of the generator motor and the drive motor. When the external power switch is in a closed state, the transformer switch is in a closed state, and the interlock switch is in an open state, the input circuit, the voltage transformation circuit, and the output circuit are electrically connected in sequence to form a charging circuit for charging the vehicle.

[0055] When the external power switch is in a closed state, the transformer switch is in an open state, and the interlock switch is in a closed state, the vehicle's power battery, the first drive circuit, and the second drive circuit constitute a motor drive circuit that supplies power to the generator motor and the drive motor.

[0056] According to a fourth aspect of the present application, a vehicle is provided, comprising the on-board charging circuit as described above; or the motor drive circuit as described above; or the circuit system as described above.

[0057] The beneficial effect of the present application is that it provides a circuit system in which the vehicle-mounted charging circuit and the motor drive circuit of the circuit system are integrated, which can reduce the complexity of the circuit system, especially the vehicle-mounted charging circuit.

[0058] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0059] The present application provides an on-board charging circuit comprising a plurality of controlled switches, which are used to adjust the voltage inputted from an external power source to the charging voltage required for charging the vehicle. The controlled switches are configured as drive switches for the vehicle's motor. By configuring the controlled switches of the on-board charging circuit as the drive switches for the vehicle's motor, the on-board charging circuit reuses the existing motor drive circuit, thereby reducing the complexity of the vehicle's on-board charging circuit and improving the integration of the vehicle's circuit system.

[0060] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0062] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0063] Figure 1 is a schematic diagram of the overall structure of a vehicle-mounted charging circuit provided in an exemplary embodiment of the present application;

[0064] Figure 2 is a schematic diagram of the overall structure of the vehicle-mounted charging circuit provided in an exemplary embodiment of the present application when charging a battery;

[0065] Figure 3 is a schematic diagram of the overall structure of the power battery provided in an exemplary embodiment of the present application supplying power to the motor drive circuit;

[0066] Figure 4 is a schematic diagram of the overall structure of a circuit system provided in an exemplary embodiment of the present application;

[0067] Figure 5 is a schematic diagram of the overall structure of charging a battery in a circuit system provided in an exemplary embodiment of the present application;

[0068] Figure 6 This is a schematic diagram of the overall structure of a circuit system provided in an exemplary embodiment of the present application when a power battery supplies power to a motor drive circuit;

[0069] Figure 7 is another structural diagram of a circuit system provided in an exemplary embodiment of the present application;

[0070] Description of reference numerals:

[0071] 10. Circuit system; 20. External power supply;

[0072] 30. Power battery;

[0073] 100. On-board charging circuit;

[0074] 200, motor drive circuit; 210, first drive circuit; 220, second drive circuit;

[0075] 110, input circuit; 120, voltage conversion circuit; 130, output circuit; 140, boost DC circuit; 150, first high-voltage distribution box; 160, second high-voltage distribution box; 170, DC EMI circuit; 180, AC EMI circuit;

[0076] K0, switch zero; K1, first switch; K2, second switch; K3, third switch; K4, fourth switch; K5, fifth switch; K6, sixth switch; K7, seventh switch; K8, eighth switch;

[0077] Q1, a first semiconductor switch; Q2, a second semiconductor switch; Q3, a third semiconductor switch; Q4, a fourth semiconductor switch; Q5, a fifth semiconductor switch; Q6, a sixth semiconductor switch; Q7, a seventh semiconductor switch; Q8, an eighth semiconductor switch; Q9, a ninth semiconductor switch; Q10, a tenth semiconductor switch; Q11, an eleventh semiconductor switch; Q12, a twelfth semiconductor switch; Q13, a thirteenth semiconductor switch; Q14, a fourteenth semiconductor switch; Q15, a fifteenth semiconductor switch; Q16, a sixteenth semiconductor switch; Q17, a seventeenth semiconductor switch; Q18, an eighteenth semiconductor switch;

[0078] L1, L2, L3, generator motor windings;

[0079] L7, L8, L9, drive motor windings;

[0080] L0, Lr, Lm, Ln, L4, L5, coil;

[0081] D0, diode;

[0082] 40. Generator motor; 50. Drive motor; 60. AC / DC integrated charging port. DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0084] According to the first aspect of this application, referring to Figures 1 to 4 The present application provides a vehicle-mounted charging circuit 100, comprising a plurality of controlled switches.

[0085] The controlled switch in the vehicle charging circuit 100 is used to adjust the voltage input from the external power source 20 to the charging voltage required for charging the vehicle.

[0086] The controlled switch is configured as a drive switch of a motor of the vehicle.

[0087] By configuring the controlled switch of the on-board charging circuit 100 as the driving switch of the vehicle's motor, the on-board charging circuit 100 reuses the original motor driving circuit 200, thereby reducing the complexity of the on-board charging circuit 100 of the vehicle and improving the integration of the vehicle's circuit system 10.

[0088] In some embodiments, the motor includes at least one of a drive motor 50 and a generator motor 40 .

[0089] In some embodiments, the controlled switch is configured as a drive switch of the drive motor 50 or the generator motor 40 .

[0090] The drive motor 50 and the generator motor 40 can provide power for vehicle driving. When in use, the circuit connected to the windings of the drive motor 50 and the generator motor 40 can receive the voltage transmitted by the vehicle power battery 30, thereby completing the driving of the drive motor 50 and the generator motor 40.

[0091] When charging the power battery 30 of the vehicle, the drive motor 50 and the generator motor 40 disconnect their windings from the circuit to disconnect from the vehicle power battery 30 .

[0092] When the controlled switch is applied to the vehicle charging circuit 100 , it includes two types of controlled switches, defined as a first type of controlled switch and a second type of controlled switch.

[0093] In some embodiments, the on-board charging circuit 100 further includes: a voltage transformation circuit 120 and an input circuit 110 .

[0094] The voltage conversion circuit 120 is used for voltage conversion, and the input circuit 110 is used for electrically connecting the voltage conversion circuit 120 to the external power source 20 .

[0095] The input circuit 110 includes a first type of controlled switch.

[0096] The first type of controlled switch is used to control the electrical connection between the external power source 20 and the transformer circuit 120 .

[0097] At least the first type of controlled switch is used to control the electrical connection and disconnection between the voltage conversion circuit 120 and the external power source 20 , thereby achieving the transmission and disconnection of voltage between the voltage conversion circuit 120 and the external power source 20 .

[0098] In some embodiments, the first type of controlled switch is configured as a drive switch of one of the generator motor 40 and the drive motor 50 of the vehicle.

[0099] In some embodiments, the input circuit 110 further includes: a plurality of bridge arms connected in parallel with each other.

[0100] The plurality of bridge arms are electrically connected to the external power source 20 , and one of the bridge arms is configured with two first-type controlled switches.

[0101] The voltage conversion circuit 120 includes a primary circuit.

[0102] The primary circuit includes a first primary connection terminal and a second primary connection terminal.

[0103] The bridge arm of the input circuit 110 has a first intermediate bridge point, which is located between two first-type controlled switches in the same bridge arm. The first primary connection terminal and the second primary connection terminal are respectively connected to different first intermediate bridge points.

[0104] refer to Figures 1 to 4 The input circuit 110 includes two bridge arms, defined as a first bridge arm and a second bridge arm, wherein a first intermediate bridge point of the first bridge arm is electrically connected to the first primary connection end, and a first intermediate bridge point of the second bridge arm is electrically connected to the second primary connection end.

[0105] In some embodiments, the vehicle charging circuit 100 further includes: an output circuit 130 .

[0106] The output circuit 130 includes a second type of controlled switch, and the second type of controlled switch is used to control the charging voltage output by the output circuit 130 required for charging the vehicle.

[0107] In some embodiments, the second type of controlled switch is configured as a drive switch of the other of the generator motor 40 and the drive motor 50 of the vehicle.

[0108] In the embodiment of the present application, the first type of controlled switch is configured as a drive switch of the generator motor 40 , and the second type of controlled switch is configured as a drive switch of the drive motor 50 .

[0109] In some embodiments, the output circuit 130 further includes: a plurality of bridge arms connected in parallel with each other.

[0110] The bridge arm is electrically connected to the power battery 30 of the vehicle, and one bridge arm is configured with at least two second-type controlled switches.

[0111] The voltage conversion circuit 120 further includes a secondary circuit.

[0112] The secondary circuit includes a first secondary connection terminal and a second secondary connection terminal.

[0113] The bridge arm of the output circuit 130 has a second intermediate bridge point located between two second-type controlled switches in the same bridge arm, and the first secondary connection terminal and the second secondary connection terminal are respectively connected to different second intermediate bridge points.

[0114] refer to Figures 1 to 4 The output circuit 130 includes two bridge arms, defined as a fifth bridge arm and a sixth bridge arm. The second middle bridge point of the fifth bridge arm is electrically connected to the first secondary side connection end, and the second middle bridge point of the sixth bridge arm is electrically connected to the second secondary side connection end.

[0115] In some embodiments, the first middle bridge point of one of the bridge arms of the input circuit 110 is configured to be electrically connected to the external power source 20 to form a freewheeling loop.

[0116] refer to Figures 1 to 4 The input circuit 110 further includes a fourth bridge arm, which electrically connects the first intermediate bridge point of the fourth bridge arm to the external power supply 20, serving as a slow arm to form a freewheeling loop for energy release, thereby playing a freewheeling role.

[0117] In some embodiments, the on-board charging circuit 100 further includes a unidirectional conduction unit.

[0118] A unidirectional conduction unit is arranged in parallel with the controlled switch.

[0119] A unidirectional conduction unit is connected in parallel with a controlled switch, refer to Figures 1 to 7 Each of the first type controlled switches is connected in parallel with a unidirectional conduction unit, and each of the second type controlled switches is connected in parallel with a diode.

[0120] Two controlled switches are provided on each of the first bridge arm, the second bridge arm, the fourth bridge arm, the fifth bridge arm and the sixth bridge arm.

[0121] Exemplarily, the unidirectional conducting unit is configured as a diode D0 , which is arranged in parallel with the controlled switch.

[0122] The first type of controlled switches in the first bridge arm are defined as the first semiconductor switch Q1 and the second semiconductor switch Q2, the first type of controlled switches in the second bridge arm are defined as the third semiconductor switch Q3 and the fourth semiconductor switch Q4, the first type of controlled switches in the fourth bridge arm are defined as the seventh semiconductor switch Q7 and the eighth semiconductor switch Q8, the second type of controlled switches in the fifth bridge arm are defined as the ninth semiconductor switch Q9 and the tenth semiconductor switch Q10, and the second type of controlled switches in the sixth bridge arm are defined as the eleventh semiconductor switch Q11 and the twelfth semiconductor switch Q12.

[0123] The first to fourth semiconductor switches Q1 to Q4 control the on / off of the circuit formed by the external power supply 20, the input circuit 110 and the transformer circuit 120, and the ninth to twelfth semiconductor switches Q9 to Q12 control the on / off of the circuit formed by the output circuit 130, the transformer circuit 120 and the vehicle power battery 30.

[0124] In some embodiments, the voltage conversion circuit 120 is configured as a coil assembly, so that the voltage conversion circuit 120 is configured as inductive coupling.

[0125] refer to Figures 1 to 7The transformer circuit 120 includes a primary coil and a secondary coil. The two coils are inductively coupled. The first primary connection end and the second primary connection end are connected to the two ends of the primary coil, and the first secondary connection end and the second secondary connection end are connected to the two ends of the secondary coil. In this way, the primary coil of the transformer circuit 120 is electrically connected to the drive circuit connected to the generator motor 40, and the secondary coil of the transformer circuit 120 is electrically connected to the drive circuit connected to the drive motor 50.

[0126] In some embodiments, the on-board charging circuit 100 further includes: a transformer switch.

[0127] The transformer switch is used to control the electrical connection between the transformer circuit 120 and the input circuit 110 and the output circuit 130 .

[0128] In some embodiments, the on-board charging circuit 100 further includes a DC EMI circuit 170 .

[0129] The DC EMI circuit 170 is used to adjust the charging voltage when the vehicle is charging;

[0130] The DC EMI circuit 170 is electrically connected to the external power source 20 and the vehicle's power battery 30 .

[0131] By providing the DC EMI circuit 170 , a charging circuit is added, which can improve the charging efficiency.

[0132] It should be noted that the DC EMI circuit 170 is connected in series between the external power supply 20 and the vehicle's power battery 30, and a tenth switch and an eleventh switch are set between the DC EMI circuit 170 and the vehicle's power battery 30. The DC EMI circuit 170 is connected in series with the external power supply 20 and the vehicle's power battery 30 to achieve on-off switching of the loop formed by the vehicle's power battery 30.

[0133] According to a second aspect of the present application, a motor drive circuit 200 is provided, including: a drive switch.

[0134] The drive switch is used to adjust the output of the vehicle's power battery 30 to the drive voltage required by the motor, wherein the drive switch is applied to the vehicle-mounted charging circuit 100 .

[0135] By applying the driving switch in the motor driving circuit 200 to the on-board charging circuit 100 , the switch between the on-board charging circuit 100 and the motor driving circuit 200 can be reused, thereby improving the circuit integration.

[0136] In some embodiments, the driving circuit further includes: a first driving circuit 210 , a second driving circuit 220 , and an interlock switch.

[0137] The first driving circuit 210 is configured to be electrically connected to one of the driving motor 50 and the generator motor 40 , and the second driving circuit 220 is configured to be electrically connected to the other of the driving motor 50 and the generator motor 40 .

[0138] The interlock switch is used to electrically connect the first driving circuit 210 and the second driving circuit 220 .

[0139] In which, when the interlock switch is in a closed state, the first drive circuit 210 and the second drive circuit 220 are electrically connected, the input circuit 110 is applied to one of the first drive circuit 210 and the second drive circuit 220, and the output circuit 130 is applied to the other of the first drive circuit 210 and the second drive circuit 220.

[0140] refer to Figures 1 to 7 The first drive circuit 210 is configured to be electrically connected to the winding of the generator motor 40, and the second drive circuit 220 is configured to be electrically connected to the winding of the drive motor 50. The input circuit 110 is applied to the first drive circuit 210, and the output circuit 130 is applied to the second drive circuit 220.

[0141] There are two interlock switches between the first driving circuit 210 and the second driving circuit 220 , which are defined as a second switch K2 and a third switch K3 , respectively.

[0142] The first drive circuit 210 also includes a third bridge arm, on which a fifth semiconductor switch Q5 and a sixth semiconductor switch Q6 are provided. The three-phase windings of the generator motor 40 are electrically connected to the first bridge arm, the second bridge arm, and the third bridge arm, respectively. When the generator motor 40 is driven by the first drive circuit 210, the three-phase windings of the generator motor 40 form an electrical circuit with the first bridge arm, the second bridge arm, and the third bridge arm, respectively.

[0143] The second drive circuit 220 also includes a seventh bridge arm, and the fifth to seventh bridge arms constitute a drive circuit for the drive motor 50. The three-phase windings of the drive motor 50 are electrically connected to the fifth, sixth and seventh bridge arms, respectively. When the second drive circuit 220 is used to drive the drive motor, the three-phase windings of the drive motor 50 form an electrical circuit with the seventh, eighth and ninth bridge arms, respectively, and the second switch K2 and the third switch K3 are closed. At the same time, the tenth switch and the eleventh switch of the transformer circuit 120 are disconnected, and the vehicle's power battery 30 is used to transmit voltage to the generator motor 40 and the drive motor 50 through the first drive circuit 210 and the second drive circuit 220, so that the generator motor 40 and the drive motor 50 can output power.

[0144] When the vehicle's power battery 30 needs to be charged, the second switch K2 and the third switch K3 are disconnected, and the sixth switch K6 and the seventh switch K7 are closed. A fourth switch K4 and a fifth switch K5 are also provided at both ends of the power battery 30. The fourth switch K4 and the fifth switch K5 are closed to form a circuit with the external power source 20 through the first bridge arm, the second bridge arm and the transformer circuit 120, and the fifth bridge arm and the sixth bridge arm and the power battery 30, so as to charge the power battery 30.

[0145] The fifth bridge arm to the seventh bridge arm are sequentially provided with a ninth semiconductor switch Q9 to a fourteenth semiconductor switch Q14 , and two semiconductor switches are provided on one bridge arm.

[0146] According to a third aspect of the present application, a circuit system 10 is provided, comprising: the above-mentioned vehicle-mounted charging circuit 100. The circuit system 10 has all the advantages of the above-mentioned vehicle-mounted charging circuit 100, which will not be described in detail in this application.

[0147] In some embodiments, the circuit system 10 further includes an external power supply 20 switch.

[0148] The external power supply 20 switch is used to control the electrical connection between the external power supply 20 and the vehicle charging power supply;

[0149] The external power source 20 switch is electrically connected to one of the generator motor 40 and the drive motor 50. When the external power source 20 switch is in a closed state, the transformer switch is in a closed state, and the interlock switch is in an open state, the input circuit 110, the voltage conversion circuit 120, and the output circuit 130 are electrically connected in sequence to form a charging circuit for charging the vehicle.

[0150] When the external power supply 20 switch is in the closed state, the transformer switch is in the open state and the interlock switch is in the closed state, the vehicle's power battery 30, the first drive circuit 210 and the second drive circuit 220 constitute a motor drive circuit 200 that supplies power to the generator motor 40 and the drive motor 50.

[0151] Exemplarily, the switch of the external power source 20 is defined as a first switch K1 .

[0152] The first switch K1 is electrically connected to the generator motor 40 and one of the drive motors 50. When the first switch K1 is closed, the sixth switch K6 and the seventh switch K7 are closed, and the second switch K2 and the third switch K3 are open, the input circuit 110, the transformer circuit 120, and the output circuit 130 are electrically connected in sequence to form a charging circuit for charging the vehicle.

[0153] When the first switch K1 is in a closed state, the sixth switch K6 and the seventh switch K7 are in an open state, and the second switch K2 and the third switch K3 are in a closed state, the vehicle's power battery 30, the first drive circuit 210 and the second drive circuit 220 constitute a motor drive circuit 200 that supplies power to the generator motor 40 and the drive motor 50.

[0154] In some embodiments, a high voltage distribution box is also included.

[0155] A first high-voltage distribution box 150 is provided between the external power source 20 and the first switch K1 , and a second high-voltage distribution box 160 is provided between the high-voltage distribution box and the power battery 30 .

[0156] The first high-voltage distribution box 150 includes a zero switch K0, an eighth switch K8 and a ninth switch, wherein the zero switch K0 is arranged in series with the first switch K1, and the eighth switch K8 and the ninth switch are electrically connected to both ends of the second high-voltage distribution box 160.

[0157] The second high voltage power distribution and external PTC and AC circuits improve the anti-interference ability.

[0158] An AC EMI circuit 180 is provided between the zero switch K0 and the first switch K1 to improve the anti-interference capability of the circuit.

[0159] The windings of the generator motor 40 include a first winding, a second winding and a third winding. The first winding is connected to the first middle bridge point of the first bridge arm, the second winding is connected to the first middle bridge point of the second bridge arm, and the third winding is connected to the first middle bridge point of the third bridge arm, wherein the first primary connection end is connected to the first middle bridge point of the first bridge arm, and the second primary connection point is connected to the first middle bridge point of the second bridge arm.

[0160] The three windings of the drive motor 50 are defined as the sixth winding, the seventh winding and the eighth winding, wherein the sixth winding is connected to the second middle bridge point of the fifth bridge arm, the seventh winding is connected to the second middle bridge point of the sixth bridge arm, the eighth winding is connected to the second middle bridge point of the seventh bridge arm, the first secondary side connection end is connected to the second middle bridge point of the fifth bridge arm, and the second secondary side connection end is connected to the second middle bridge point of the sixth bridge arm.

[0161] The first to fourth semiconductor switches Q1 to Q4 are multiplexed as switches of the first driving circuit 210 and the input circuit 110 , and the ninth to twelfth semiconductor switches Q9 to Q12 are multiplexed as driving switches of the second driving circuit 220 and controlled switches of the output circuit 130 .

[0162] A zero coil is provided between the first switch K1 and the winding of the generator motor 40 .

[0163] The first to fourth bridge arms of the present application constitute a boost circuit, and the fifth to seventh bridge arms constitute a rectifier circuit.

[0164] In charging mode, during DC charging, the zero switch K0, the first switch K1, the fourth switch K4, the fifth switch K5, the sixth switch K6, the seventh switch K7, the eighth switch K8, and the ninth switch K9 are closed; during AC charging, the eighth switch K8 and the ninth switch K9 are disconnected, the second switch K2 and the third switch K3 are in the normally-off mode, and the circuit topology is the charging state of a single-phase charging circuit. The external power supply 20 transfers energy to the first winding L1 and the second winding L2 of the generator motor 40, and charges the power battery 30 through the boost circuit composed of the bridge arm of the multiplexing generator motor 40 controller module and the transformer and the rectifier bridge arm composed of two groups of bridge arms of the multiplexing drive motor 50 controller module.

[0165] In the driving state, the second switch K2 , the third switch K3 , the fourth switch K4 , and the fifth switch K5 are closed, and the other switches are open, so that the first driving circuit 210 and the second driving circuit 220 are connected and start operating.

[0166] In some embodiments, a boost DC circuit 140 is further included. The boost DC circuit 140 is connected in parallel between the second drive circuit 220 and the power battery 30 .

[0167] In some embodiments, a capacitor C0 is further provided in parallel with the second driving circuit 220 , and a capacitor C1 is provided between the power battery 30 and the boost DC circuit 140 .

[0168] The boost DC circuit 140 has two bridge arms, which are defined as an eighth bridge arm and a ninth bridge arm, and are respectively provided with controlled switches, namely the fifteenth semiconductor switch Q15 to the eighteenth semiconductor switch Q18.

[0169] The fifth coil is connected to the middle bridge point of the ninth bridge arm, the fourth coil is connected to the middle bridge point of the eighth bridge arm, and the fourth coil and the fifth coil are respectively connected in parallel to the capacitor C1.

[0170] In some embodiments, the circuit system 10 includes an integrated AC / DC charging port 60 , and the circuit interface of the circuit system 10 is connected to the external power source 20 through the integrated AC / DC charging port 60 , further improving the integration of the circuit system 10 .

[0171] In some embodiments, the voltage conversion circuit 120 further includes a secondary circuit.

[0172] The secondary circuit includes an inductor Ln, a first secondary connection terminal and a second secondary connection terminal.

[0173] The first secondary connection end is connected to the ninth semiconductor switch Q9 and the tenth semiconductor switch Q10 of the fifth bridge arm of the second drive circuit 220 driving the motor 50, and the second secondary connection end is connected to the sixth bridge arm composed of the eleventh semiconductor switch Q11 and the twelfth semiconductor switch Q12 in the second drive circuit 220 driving the motor 50 through the seventh switch K7. The two groups of bridge arms are used as rectifier bridge arms in the charging mode.

[0174] This application exemplarily describes the working process of the circuit system 10:

[0175] The positive direction of the external power supply 20 is connected to the AC EMI circuit 180 through the zero switch K0, and then connected in series with the inductor L0 through the first switch K1 and the first winding L1, the second winding L2, and the third winding L3 of the three-phase motor winding of the generator motor 40. The first winding L1 is connected between the first semiconductor switch Q1 and the second semiconductor switch Q2 in the controller module of the generator motor 40, the second winding L2 is connected between the third semiconductor switch Q3 and the fourth semiconductor switch Q4, and the third winding L3 is connected between the fifth semiconductor switch Q5 and the sixth semiconductor switch Q6. A fourth bridge arm is introduced, and the seventh semiconductor switch Q7 and the eighth semiconductor switch Q8 on the fourth bridge arm serve as a slow-speed arm for freewheeling. The negative direction of the external power supply 20 is connected between the seventh semiconductor switch Q7 and the eighth semiconductor switch Q8 in the second drive circuit 220 of the drive motor 50, and then connected to the capacitor C0 through the first switch K1 and the second switch K2. The capacitor C0 is used for filtering and is connected to the ninth semiconductor switch. The fifth bridge arm formed by the body switch Q9 and the tenth semiconductor switch Q10 is connected in parallel. The sixth winding L6, seventh winding L7, and eighth winding L8 of the three-phase motor windings of the drive motor 50 are connected between the ninth semiconductor switch Q9 and the first semiconductor switch Q1, the eleventh semiconductor switch Q11 and the twelfth semiconductor switch Q12, and the thirteenth semiconductor switch Q13 and the twelfth semiconductor switch Q14, respectively. The boost DC circuit 140 is connected after the fifteenth semiconductor switch Q15 and the sixteenth semiconductor switch Q16. The front ends of the inductors L4 and L5 are connected between the seventeenth semiconductor switch Q17 and the eighteenth semiconductor switch Q18 in the boost DC circuit 140, and the rear ends are connected to the positive and negative electrodes of the power battery 30 through the fourth switch K4 and the fifth switch K5, respectively. The capacitor C1 is used for filtering. The negative electrode of the first winding L1 is connected to the first primary connection terminal of the primary circuit of the transformer circuit 120, and the negative electrode of the second winding L2 is connected to the second primary connection terminal of the transformer circuit 120 through the sixth switch K6. The voltage conversion circuit 120 is composed of coils Lr and Lm. The voltage of the power supply forms a voltage conversion loop through the input circuit 110, the voltage conversion circuit 120, and the output circuit 130, so that the voltage flowing to the power battery 30 is converted.

[0176] According to a fourth aspect of the present application, a vehicle 1 is provided, comprising the on-board charging circuit 100 as described above; or the motor drive circuit 200 as described above; or the circuit system 10 as described above.

[0177] The vehicle 1 has all the beneficial effects of the above-mentioned on-board charging circuit 100 or motor drive circuit 200 or circuit system 10, which will not be described in detail in this application.

[0178] The vehicle 1 may be a plug-in hybrid vehicle or a new energy vehicle, etc., which is not specifically limited in this application.

[0179] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0180] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0181] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0182] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A vehicle-mounted charging circuit, characterized in that: include: A plurality of controlled switches for adjusting the voltage of the external power input to the charging voltage required for charging the vehicle; Wherein, the controlled switch is configured as a drive switch of a motor of the vehicle.

2. The vehicle-mounted charging circuit according to claim 1, characterized in that: The motor includes at least one of a drive motor and a generator motor.

3. The vehicle-mounted charging circuit according to claim 2, characterized in that: The controlled switch is configured as a drive switch of the drive motor or the generator motor.

4. The vehicle-mounted charging circuit according to claim 1, characterized in that: The vehicle-mounted charging circuit further includes: A voltage conversion circuit for converting voltage; an input circuit, configured to electrically connect the voltage conversion circuit to an external power source; Wherein, the input circuit includes: The first type of controlled switch is used to control the electrical connection between the external power supply and the voltage conversion circuit.

5. The vehicle-mounted charging circuit according to claim 4, characterized in that: The first type of controlled switch is configured as a drive switch of one of a generator motor and a drive motor of the vehicle.

6. The vehicle-mounted charging circuit according to claim 4, characterized in that: The input circuit further includes: a plurality of bridge arms electrically connected to an external power source and arranged in parallel with each other, each bridge arm being configured with two first-type controlled switches; The voltage conversion circuit comprises: a first primary side connection terminal and a second primary side connection terminal; The bridge arm has a first intermediate bridge point, and the first intermediate bridge point is located between two first-type controlled switches in the same bridge arm; The first primary side connection end and the second primary side connection end are respectively connected to different first intermediate bridge points.

7. The vehicle-mounted charging circuit according to claim 4, characterized in that: The vehicle-mounted charging circuit further includes: Output circuit, including: The second type of controlled switch is used to control the charging voltage required for vehicle charging output by the output circuit.

8. The vehicle-mounted charging circuit according to claim 7, characterized in that: The second type of controlled switch is configured as a drive switch of the other of the generator motor and the drive motor of the vehicle.

9. The vehicle-mounted charging circuit according to claim 7, characterized in that: The output circuit further includes: a plurality of bridge arms electrically connected to the power battery of the vehicle and arranged in parallel with each other, each bridge arm being configured with at least two second-type controlled switches; The voltage conversion circuit comprises: a first secondary side connection terminal and a second secondary side connection terminal; The bridge arm has a second intermediate bridge point, and the second intermediate bridge point is located between two second-type controlled switches in the same bridge arm; The first secondary side connection end and the second secondary side connection end are respectively connected to different second intermediate bridge points.

10. The vehicle-mounted charging circuit according to claim 4, characterized in that: The first middle bridge point of one of the bridge arms of the input circuit is configured to be electrically connected to an external power source to form a freewheeling loop.

11. The vehicle-mounted charging circuit according to claim 1, characterized in that: Also includes: The unidirectional conducting unit is arranged in parallel with the controlled switch.

12. The vehicle-mounted charging circuit according to claim 4, characterized in that: The voltage conversion circuit is configured as a coil assembly, so that the voltage conversion circuit is configured as inductive coupling.

13. The vehicle-mounted charging circuit according to claim 7, characterized in that: Also includes: The transformer switch is used to control the electrical connection between the transformer circuit and the input circuit and the output circuit.

14. The vehicle-mounted charging circuit according to claim 1, characterized in that: Also includes: a DC EMI circuit, for adjusting the charging voltage when the vehicle is charging; The DC EMI circuit is electrically connected to the external power supply and the power battery of the vehicle respectively.

15. A motor drive circuit, characterized in that: include: A drive switch is used to adjust the vehicle's power battery output to the drive voltage required by the motor; Wherein, the driving switch is applied to a vehicle-mounted charging circuit.

16. The motor driving circuit according to claim 15, characterized in that: The motor drive circuit further includes: a first drive circuit configured to be electrically connected to one of the drive motor and the generator motor; a second drive circuit configured to be electrically connected to the other of the drive motor and the generator motor; Also includes: an interlock switch, configured to electrically connect the first drive circuit and the second drive circuit; Wherein, when the interlock switch is in a closed state, the first drive circuit and the second drive circuit are electrically connected; The input circuit of the on-vehicle charging circuit is applied to one of the first drive circuit and the second drive circuit, and the output circuit of the on-vehicle charging circuit is applied to the other of the first drive circuit and the second drive circuit.

17. A circuit system, characterized in that: include: The on-vehicle charging circuit according to any one of claims 1 to 14, or the motor drive circuit according to claim 15 or 16.

18. The circuit system according to claim 17, wherein: Also includes: External power switch, used to control the electrical connection between the external power supply and the vehicle charging power supply; The external power switch is electrically connected to one of the generator motor and the drive motor. When the external power switch is in a closed state, the transformer switch of the on-board charging circuit is in a closed state, and the interlock switch is in an open state, the input circuit, the voltage conversion circuit, and the output circuit of the on-board charging circuit are electrically connected in sequence to form a charging circuit for charging the vehicle. When the external power switch is in a closed state, the transformer switch is in an open state, and the interlock switch is in a closed state, the vehicle's power battery, the first drive circuit, and the second drive circuit constitute a motor drive circuit that supplies power to the generator motor and the drive motor.

19. A vehicle, characterized in that: It includes the on-board charging circuit according to any one of claims 1 to 14; or the motor drive circuit according to claim 15 or 16; or the circuit system according to claim 17 or 18.

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