Vehicle drive charging circuit and control method thereof

Abstract

The invention discloses a vehicle driving charging circuit, a control method of the vehicle driving charging circuit and electronic equipment. The vehicle driving charging circuit comprises a first converter connected with a battery and a charging port, and the first converter is controllably in an inverter mode, a rectification mode, an interleaving boost mode and an interleaving buck mode; the first converter comprises a first converter first branch circuit, a first converter second branch circuit and a first converter third branch circuit, the first converter third branch circuit is in on-off connection with the charging port through the charging switch, and the first converter first branch circuit is connected with the battery; the first converter first branch and the first converter second branch are in on-off connection through a second switch, and the first converter second branch and the first converter third branch are in on-off connection through a first switch. According to the vehicle driving charging circuit, on the basis of the original inverter function, the extra boost charging function and the extra voltage-reducing and current-increasing charging function are added, and by multiplexing the inverter and the motor, the overall cost is optimal, and the size is minimum.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a vehicle driving and charging circuit, a control method for a vehicle driving and charging circuit, an electronic device, a storage medium, and a computer program product. Background Art

[0002] With the vigorous development of the new energy vehicle industry and the popularization of concepts such as intelligence and energy conservation, higher requirements are placed on the efficiency of the power control system and the compatibility with different charging piles. Among them, the battery pack voltage is always not fixed, and under different speeds, the bus voltage at the highest efficiency of the electric power train (EPT) is also not fixed, so that the EPT cannot always be in the optimal efficiency condition. The second is the battery pack voltage. When the power of the whole vehicle remains unchanged, the EPT power circuit needs to be adjusted. The third is the adaptation problem of the high-voltage battery that cannot match the low-voltage charging pile; finally, the high-rate battery cannot use the full low-voltage charging pile power to achieve fast charging due to the limited maximum current of the charging pile.

[0003] Currently, the prior art proposes to reuse EPT to achieve boost charging. Currently, there are two types of multiplexing EPT to achieve boost charging.

[0004] (2) The motor inductor is in the form of one series and two parallels, that is, the positive pole of the charging pile is connected to one phase of the motor, and then the two-phase inverter is used to realize the two-phase staggered parallel BOOST circuit.

[0005] (1) The motor inductor is connected in parallel, that is, the positive pole of the charging pile is connected to the neutral point of the motor, and then the three-phase inverter is used to realize the three-phase staggered parallel BOOST circuit.

[0006] However, the two current topologies mentioned above can only achieve boost (BOOST), but cannot achieve buck (BUCK) to increase the current for fast charging of the battery pack, and cannot meet the compatibility requirements of different charging piles. Summary of the Invention

[0007] Based on this, it is necessary to provide a vehicle drive charging circuit, a control method for a vehicle drive charging circuit, an electronic device, a storage medium and a computer program product to address the technical problem that the existing technology cannot meet the compatibility of different charging piles.

[0008] The present invention provides a vehicle driving and charging circuit, comprising: a first converter connected to a battery and a charging port respectively, wherein the first converter is controllable to an inverter mode, a rectifier mode, an interleaved parallel boost mode, or an interleaved parallel buck mode;

[0009] The first converter includes: a first branch of the first converter connected to the first phase line of the motor and including a switching tube, a second branch of the first converter connected to the second phase line of the motor and including a switching tube, and a third branch of the first converter connected to the third phase line of the motor and including a switching tube. The third branch of the first converter is connectable and disconnectable to the charging port through a charging switch, the first branch of the first converter is connected to the battery, the first branch of the first converter and the second branch of the first converter are connectable and disconnectable through a second switch, and the second branch of the first converter and the third branch of the first converter are connectable and disconnectable through the first switch.

[0010] Furthermore, the first branch of the first converter includes: a first switch tube and a second switch tube, the second branch of the first converter includes: a third switch tube and a fourth switch tube, and the third branch of the first converter includes: a fifth switch tube and a sixth switch tube;

[0011] The first end of the first switching tube is connected to the battery, the first end of the first switching tube is connected to the first end of the third switching tube through the second switch, the first end of the third switching tube is connected to the first end of the fifth switching tube through the first switch, the first end of the fifth switching tube is connected to the positive electrode of the charging port through the charging switch, the second end of the second switching tube, the second end of the fourth switching tube, and the second end of the sixth switching tube are respectively connected to the negative electrode of the battery and the negative electrode of the charging port, the second end of the first switching tube and the first end of the second switching tube are respectively connected to the first phase line of the motor, the second end of the third switching tube and the first end of the fourth switching tube are respectively connected to the second phase line of the motor, and the second end of the fifth switching tube and the first end of the sixth switching tube are respectively connected to the third phase line of the motor; or

[0012] The first end of the first switching tube, the first end of the third switching tube, and the first end of the fifth switching tube are respectively connected to the positive electrode of the battery. The first end of the fifth switching tube is connected to the positive electrode of the charging port through the charging switch. The second end of the second switching tube is connected to the negative electrode of the battery. The second switching tube is connected to the second end of the fourth switching tube through the second switch. The second end of the fourth switching tube is connected to the second end of the sixth switching tube through the first switch. The second end of the sixth switching tube is connected to the negative electrode of the charging port. The second end of the first switching tube and the first end of the second switching tube are respectively connected to the first phase line of the motor. The second end of the third switching tube and the first end of the fourth switching tube are respectively connected to the second phase line of the motor. The second end of the fifth switching tube and the first end of the sixth switching tube are respectively connected to the third phase line of the motor.

[0013] Furthermore, the first branch of the first converter includes: an eleventh switching tube, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube, a first capacitor, and a second capacitor; the second branch of the first converter includes: a fifteenth switching tube, a sixteenth switching tube, a seventeenth switching tube, an eighteenth switching tube, a third capacitor, and a fourth capacitor; and the third branch of the first converter includes: a nineteenth switching tube, a twentieth switching tube, a twenty-first switching tube, a twenty-second switching tube, a fifth capacitor, and a sixth capacitor;

[0014] The first end of the eleventh switching tube is connected to the battery. The first end of the eleventh switching tube is connected to the first end of the fifteenth switching tube via the second switch. The first end of the fifteenth switching tube is connected to the first end of the nineteenth switching tube via the first switch. The first end of the nineteenth switching tube is connected to the positive electrode of the charging port via the charging switch. The second ends of the twelfth switching tube, the second ends of the sixteenth switching tube, and the second end of the twentieth switching tube are respectively connected to the negative electrode of the battery and the negative electrode of the charging port. The second end of the eleventh switching tube, the first end of the twelfth switching tube, and the first end of the thirteenth switching tube are respectively connected to the first phase line of the motor. The second end of the thirteenth switching tube is connected to the second end of the fourteenth switching tube. The first end of the fourteenth switching tube is connected to the positive electrode of the battery via the first capacitor. connected to the negative electrode of the battery via the second capacitor, the second end of the fifteenth switching tube, the first end of the sixteenth switching tube, and the first end of the seventeenth switching tube are respectively connected to the second phase line of the motor, the second end of the seventeenth switching tube is connected to the second end of the eighteenth switching tube, the first end of the eighteenth switching tube is respectively connected to the positive electrode of the battery via the third capacitor and to the negative electrode of the battery via the fourth capacitor, the second end of the nineteenth switching tube, the first end of the twentieth switching tube, and the first end of the twenty-first switching tube are respectively connected to the third phase line of the motor, the second end of the twenty-first switching tube is connected to the second end of the twenty-second switching tube, the first end of the twenty-second switching tube is respectively connected to the positive electrode of the battery via the fifth capacitor and to the negative electrode of the battery via the sixth capacitor; or

[0015] The first end of the eleventh switching tube is connected to the battery. The first end of the eleventh switching tube is connected to the first end of the fifteenth switching tube via the second switch. The first end of the fifteenth switching tube is connected to the first end of the nineteenth switching tube via the first switch. The first end of the nineteenth switching tube is connected to the positive electrode of the charging port via the charging switch. The second ends of the twelfth switching tube, the second ends of the sixteenth switching tube, and the second end of the twentieth switching tube are respectively connected to the negative electrode of the battery and the negative electrode of the charging port. The second end of the eleventh switching tube, the first end of the twelfth switching tube, and the second end of the thirteenth switching tube are respectively connected to the first phase line of the motor. The first end of the thirteenth switching tube is connected to the first end of the fourteenth switching tube. The second ends of the fourteenth switching tubes are respectively connected to the positive electrode of the battery via the first capacitor. connected to the negative electrode of the battery via the second capacitor, the second end of the fifteenth switching tube, the first end of the sixteenth switching tube, and the second end of the seventeenth switching tube are respectively connected to the second phase line of the motor, the first end of the seventeenth switching tube is connected to the first end of the eighteenth switching tube, the second end of the eighteenth switching tube is respectively connected to the positive electrode of the battery via the third capacitor and to the negative electrode of the battery via the fourth capacitor, the second end of the nineteenth switching tube, the first end of the twentieth switching tube, and the second end of the twenty-first switching tube are respectively connected to the third phase line of the motor, the first end of the twenty-first switching tube is connected to the first end of the twenty-second switching tube, and the second end of the twenty-second switching tube is respectively connected to the positive electrode of the battery via the fifth capacitor and to the negative electrode of the battery via the sixth capacitor; or

[0016] The first end of the eleventh switching tube, the first end of the fifteenth switching tube, and the first end of the nineteenth switching tube are respectively connected to the positive electrode of the battery. The first end of the nineteenth switching tube is connected to the positive electrode of the charging port through the charging switch. The second end of the twelfth switching tube is connected to the negative electrode of the battery. The second end of the twelfth switching tube is connected to the second end of the sixteenth switching tube through the second switch. The second end of the sixteenth switching tube is connected to the second end of the twentieth switching tube through the first switch. The second end of the twentieth switching tube is connected to the negative electrode of the charging port. The second end of the eleventh switching tube, the first end of the twelfth switching tube, and the first end of the thirteenth switching tube are respectively connected to the first phase line of the motor. The second end of the thirteenth switching tube is connected to the second end of the fourteenth switching tube. The first end of the fourteenth switching tube is respectively connected to the first capacitor through the first capacitor. the positive electrode of the battery is connected, and the negative electrode of the battery is connected through the second capacitor. The second end of the fifteenth switching tube, the first end of the sixteenth switching tube, and the first end of the seventeenth switching tube are respectively connected to the second phase line of the motor. The second end of the seventeenth switching tube is connected to the second end of the eighteenth switching tube. The first end of the eighteenth switching tube is respectively connected to the positive electrode of the battery through the third capacitor and to the negative electrode of the battery through the fourth capacitor. The second end of the nineteenth switching tube, the first end of the twentieth switching tube, and the first end of the twenty-first switching tube are respectively connected to the third phase line of the motor. The second end of the twenty-first switching tube is connected to the second end of the twenty-second switching tube. The first end of the twenty-second switching tube is respectively connected to the positive electrode of the battery through the fifth capacitor and to the negative electrode of the battery through the sixth capacitor.

[0017] The first end of the eleventh switching tube, the first end of the fifteenth switching tube, and the first end of the nineteenth switching tube are respectively connected to the positive electrode of the battery. The first end of the nineteenth switching tube is connected to the positive electrode of the charging port through the charging switch. The second end of the twelfth switching tube is connected to the negative electrode of the battery. The second end of the twelfth switching tube is connected to the second end of the sixteenth switching tube through the second switch. The second end of the sixteenth switching tube is connected to the second end of the twentieth switching tube through the first switch. The second end of the twentieth switching tube is connected to the negative electrode of the charging port. The second end of the eleventh switching tube, the first end of the twelfth switching tube, and the second end of the thirteenth switching tube are respectively connected to the first phase line of the motor. The first end of the thirteenth switching tube is connected to the first end of the fourteenth switching tube. The second end of the fourteenth switching tube is respectively connected to the first capacitor. The positive electrode of the battery is connected, and the negative electrode of the battery is connected through the second capacitor. The second end of the fifteenth switching tube, the first end of the sixteenth switching tube, and the second end of the seventeenth switching tube are respectively connected to the second phase line of the motor. The first end of the seventeenth switching tube is connected to the first end of the eighteenth switching tube. The second end of the eighteenth switching tube is respectively connected to the positive electrode of the battery through the third capacitor and to the negative electrode of the battery through the fourth capacitor. The second end of the nineteenth switching tube, the first end of the twentieth switching tube, and the second end of the twenty-first switching tube are respectively connected to the third phase line of the motor. The first end of the twenty-first switching tube is connected to the first end of the twenty-second switching tube. The second end of the twenty-second switching tube is respectively connected to the positive electrode of the battery through the fifth capacitor and to the negative electrode of the battery through the sixth capacitor.

[0018] Furthermore, it also includes: a second converter connected to the battery and the first converter, and the second converter is controllable to be in an interleaved parallel boost mode or an interleaved parallel buck mode.

[0019] Furthermore, the second converter includes: a first inductor, a second inductor, a seventh switching tube, an eighth switching tube, a ninth switching tube, a tenth switching tube, and a third switch, wherein the first end of the seventh switching tube and the first end of the eighth switching tube are connected to the first end of the first inductor and the first end of the second inductor via the third switch, the first end of the first inductor and the first end of the second inductor are respectively connected to the positive electrode of the battery, the second end of the ninth switching tube and the second end of the tenth switching tube are connected to the negative electrode of the battery, the second end of the seventh switching tube and the first end of the ninth switching tube are respectively connected to the second end of the first inductor, and the second end of the eighth switching tube and the first end of the tenth switching tube are respectively connected to the second end of the second inductor;

[0020] When the third switch is closed, the second converter does not operate;

[0021] When the third switch is disconnected and the battery is discharged, the second converter is in an interleaved parallel boost mode;

[0022] When the third switch is disconnected and the battery is charged, the second converter is in an interleaved parallel buck mode.

[0023] The present invention provides a control method for a vehicle driving charging circuit as described above, comprising:

[0024] Obtain vehicle operating conditions;

[0025] According to the vehicle operating condition, the first converter is controlled to be in inverter mode, rectifier mode, interleaved parallel boost mode, interleaved parallel buck mode or not working.

[0026] Furthermore, controlling the first converter to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate according to the vehicle operating condition includes:

[0027] If the vehicle operating condition is a driving condition or a vehicle kinetic energy recovery condition, the charging switch is controlled to be disconnected, and the first switch and the second switch are controlled to be closed. In the driving condition, the first converter is in an inverter mode, and in the vehicle kinetic energy recovery condition, the first converter is in a rectifier mode.

[0028] When the battery voltage is less than or equal to a first voltage threshold, if the vehicle is in a charging state and the charging pile output current is less than the battery current requirement, the first switch is controlled to be closed, the second switch is disconnected, the charging switch is controlled to be closed, and the first converter is in an interleaved parallel buck mode; or

[0029] When the voltage of the battery is less than or equal to a first voltage threshold, if the vehicle is in a charging state and the output current of the charging pile meets the battery current requirement, the first switch and the second switch are controlled to be closed, the charging switch is controlled to be closed, and the first converter is not operated; or

[0030] When the battery voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the charging pile output voltage is greater than the battery voltage, and the charging pile output current is less than the battery current demand, then the first switch is controlled to be closed, the second switch is opened, the charging switch is controlled to be closed, and the first converter is in an interleaved parallel buck mode; or

[0031] When the voltage of the battery is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery, and the output current of the charging pile meets the battery current requirement, then the first switch and the second switch are controlled to be closed, the charging switch is controlled to be closed, and the first converter does not operate; or

[0032] When the battery voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the battery voltage, the first switch is controlled to be disconnected, the second switch is controlled to be closed, the charging switch is controlled to be closed, and the first converter is in an interleaved parallel boost mode; or

[0033] When the voltage of the battery is greater than a second voltage threshold, if the vehicle is in a charging state and the output voltage of the charging pile is greater than the voltage of the battery, the first switch and the second switch are controlled to be closed, the charging switch is controlled to be closed, and the first converter is not operated; or

[0034] When the voltage of the battery is greater than the second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery, the first switch is controlled to be disconnected, the second switch is controlled to be closed, the charging switch is controlled to be closed, and the first converter is in an interleaved parallel boost mode.

[0035] Furthermore, the vehicle drive charging circuit further includes: a second converter connected to the battery and the first converter, the second converter being controllable to operate in an interleaved parallel boost mode or an interleaved parallel buck mode, and controlling the first converter to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate according to the vehicle operating condition, including:

[0036] According to the vehicle operating conditions, the second converter is controlled to be in interleaved parallel boost mode, interleaved parallel buck mode or not working, and the first converter is controlled to be in inverter mode, rectifier mode, interleaved parallel boost mode, interleaved parallel buck mode or not working.

[0037] Furthermore, according to the vehicle operating condition, controlling the second converter to operate in an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate, and controlling the first converter to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate, includes:

[0038] When the battery voltage is less than or equal to a second voltage threshold, if the vehicle is in a driving condition, the charging switch is controlled to be disconnected, the third switch is controlled to be disconnected, the second converter is operated in an interleaved parallel boost mode, the first switch and the second switch are controlled to be closed, and the first converter is operated in an inverter mode; or

[0039] When the battery voltage is greater than a second voltage threshold, if the vehicle is in a driving condition, the charging switch is controlled to be disconnected, the first switch and the second switch are controlled to be closed, the first converter is in an inverter mode, and it is determined whether the battery voltage meets the bus voltage requirement. If so, the third switch is controlled to be closed, and the second converter is not operated; otherwise, the third switch is controlled to be disconnected, and the second converter is in an interleaved parallel boost mode; or

[0040] When the battery voltage is less than or equal to the second voltage threshold, if the vehicle operating condition is a vehicle kinetic energy recovery condition, the third switch is controlled to be disconnected, the second converter is controlled to be in an interleaved parallel buck mode, the first switch and the second switch are controlled to be closed, and the first converter is controlled to be in a rectifier mode; or

[0041] When the battery voltage is greater than a second voltage threshold, if the vehicle operating condition is a vehicle kinetic energy recovery condition, the third switch is controlled to be closed, the second converter is not operated, the first switch and the second switch are controlled to be closed, and the first converter is in a rectification mode; or

[0042] When the battery voltage is less than or equal to the first voltage threshold, if the vehicle is in a charging state and the output current of the charging pile is less than the battery current requirement, the charging switch is controlled to be closed, the third switch is controlled to be disconnected, the second converter is in an interleaved parallel buck mode, the first switch and the second switch are controlled to be closed, and the first converter is not operated; or

[0043] When the battery voltage is less than or equal to the first voltage threshold, if the vehicle is in a charging state and the charging pile output current is less than the battery current requirement, the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter is not operated, the first switch is controlled to be closed, the second switch is disconnected, and the first converter is in an interleaved parallel buck mode; or

[0044] When the voltage of the battery is less than or equal to the first voltage threshold, if the vehicle is in a charging condition and the output current of the charging pile meets the battery current requirement, the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter is not operated, and the first switch and the second switch are controlled to be closed, and the first converter is not operated; or

[0045] When the battery voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery, and the output current of the charging pile is less than the battery current requirement, then the charging switch is controlled to be closed, the third switch is controlled to be disconnected, the second converter is in an interleaved parallel buck mode, the first switch and the second switch are controlled to be closed, and the first converter is not operated; or

[0046] When the battery voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery, and the output current of the charging pile is less than the battery current requirement, then the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter is not operated, the first switch is controlled to be closed, the second switch is disconnected, and the first converter is in an interleaved parallel buck mode; or

[0047] When the voltage of the battery is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery, and the output current of the charging pile meets the battery current requirement, then the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter is not operated, and the first switch and the second switch are controlled to be closed, and the first converter is not operated; or

[0048] When the battery voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle is in a charging state and the output voltage of the charging pile is less than or equal to the battery voltage, the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter is not operated, the first switch is controlled to be opened, the second switch is controlled to be closed, and the first converter is in an interleaved parallel boost mode;

[0049] When the voltage of the battery is greater than the second voltage threshold, if the vehicle is in a charging condition and the output voltage of the charging pile is greater than the voltage of the battery, the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter is not operated, the first switch and the second switch are controlled to be closed, the first converter is not operated, and the charging switch is controlled to be closed; or

[0050] When the voltage of the battery is greater than the second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery, the charging switch is controlled to be closed, the third switch is controlled to be closed, the second converter does not work, the first switch is controlled to be disconnected, the second switch is closed, and the first converter is in an interleaved parallel boost mode.

[0051] The present invention provides an electronic device, comprising:

[0052] at least one processor; and,

[0053] a memory communicatively connected to at least one of the processors; wherein,

[0054] The memory stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one processor to perform the control method of the vehicle driving and charging circuit as described above.

[0055] The present invention provides a storage medium storing computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the control method of the vehicle driving charging circuit as described above.

[0056] The present invention provides a computer program product, comprising a computer program / instruction, which implements the above-mentioned control method for a vehicle driving and charging circuit when executed by a processor.

[0057] The vehicle-driven charging circuit of the present invention adds a first switch and a second switch, allowing the first converter to add additional boost charging and buck-and-current-increasing charging functions to its existing inverter function. By reusing the inverter and motor, the overall cost is optimized and the volume is minimized. While meeting vehicle performance requirements, the present invention can adapt to different battery pack voltage platforms without changing the EPT specifications, facilitating the platformization of EPT. Externally discharging users can charge using charging piles with different voltage platforms, achieving both charging station-agnostic charging and current-increasing performance, maximizing the use of the charging pile's output power and achieving the fastest recharging speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 This is a circuit diagram of a vehicle driving and charging circuit according to an embodiment of the present invention;

[0059] Figure 2 This is a circuit diagram of a vehicle driving and charging circuit according to another embodiment of the present invention;

[0060] Figure 3 This is a schematic diagram of the first converter entering the interleaved parallel boost mode according to another embodiment of the present invention;

[0061] Figure 4 This is a schematic diagram of the first converter entering the interleaved parallel buck mode according to another embodiment of the present invention;

[0062] Figure 5 This is a schematic diagram of the second converter entering the boost mode according to another embodiment of the present invention;

[0063] Figure 6This is a schematic diagram of the second converter entering the pressure-lowering mode according to another embodiment of the present invention;

[0064] Figure 7 This is a circuit diagram of another embodiment of the present invention in which a switch of a vehicle driving and charging circuit is located on a negative line;

[0065] Figure 8 This is a circuit diagram of a vehicle driving and charging circuit with a three-level power topology according to yet another embodiment of the present invention;

[0066] Figure 9 This is a circuit diagram of a power topology vehicle driving charging circuit with a switch located on the negative line according to another embodiment of the present invention;

[0067] Figure 10 This is a flowchart of a control method for a vehicle driving and charging circuit as described above according to an embodiment of the present invention;

[0068] Figure 11 The figure is a schematic diagram of the hardware structure of an electronic device of the present invention.

[0069] Marking Description

[0070] 1. First converter; 11. First switch; 12. Second switch; 13. First switching transistor; 14. Second switching transistor; 15. Third switching transistor; 16. Fourth switching transistor; 17. Fifth switching transistor; 18. Sixth switching transistor; 111. Eleventh switching transistor; 112. Twelfth switching transistor; 113. Thirteenth switching transistor; 114. Fourteenth switching transistor; 115. Fifteenth switching transistor; 116. Sixteenth switching transistor; 117. Seventeenth switching transistor; 118. Eighteenth switching transistor; 119. Nineteenth switching transistor; 120. Twentieth switching transistor; 121. Twenty-first switching transistor; 122. Twenty-second switching transistor; 101. First capacitor ;102, second capacitor;103, third capacitor;104, fourth capacitor;105, fifth capacitor;106, sixth capacitor;107, seventh capacitor;108, eighth capacitor;109, ninth capacitor;1010, tenth capacitor;1011, eleventh capacitor;1012, twelfth capacitor;2, second converter;21, first inductor;22, second inductor;23, seventh switch tube;24, eighth switch tube;25, ninth switch tube;26, tenth switch tube;27, third switch;3, battery;4, charging port;5, charging switch;6, motor;61, first phase line;62, second phase line;63, third phase line. DETAILED DESCRIPTION

[0071] The following further describes specific embodiments of the present invention with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0072] like Figure 1 The figure shows a vehicle driving and charging circuit according to an embodiment of the present invention, comprising: a first converter 1 connected to a battery 3 and a charging port 4, respectively, wherein the first converter 1 is controllable to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, or an interleaved parallel buck mode;

[0073] The first converter 1 includes: a first branch of the first converter connected to the first phase line 61 of the motor 6 and including a switching tube, a second branch of the first converter connected to the second phase line 62 of the motor 6 and including a switching tube, and a third branch of the first converter connected to the third phase line 63 of the motor 6 and including a switching tube. The third branch of the first converter is connected to the charging port 4 through the charging switch 5, the first branch of the first converter is connected to the battery 3, the first branch of the first converter and the second branch of the first converter are connected to each other through the second switch 12, and the second branch of the first converter and the third branch of the first converter are connected to each other through the first switch 11.

[0074] Specifically, the first converter 1 is composed of an inverter connected to the motor 6 and a first switch 11 and a second switch 12. The first switch 11 and the second switch 12 are relays or controllable switches.

[0075] Preferably, the first switch 11 and the second switch 12 are normally closed relays.

[0076] When the first switch 11 and the second switch 12 are closed, the first converter 1 is controlled to be in inverter mode, rectifier mode or not in operation;

[0077] When the first switch 11 is open, the second switch 12 is closed, and the charging switch 5 is closed, the first converter 1 is controlled to be in an interleaved parallel boost mode;

[0078] When the first switch 11 is closed, the second switch 12 is open, and the charging switch 5 is closed, the first converter 1 is controlled to be in the staggered parallel buck mode.

[0079] More specifically:

[0080] When the first switch 11 and the second switch 12 are normally closed, the first converter 1 is controlled to enter inverter mode and rectifier mode. Each branch operates in the existing inverter mode when current is supplied from the battery 3 to the motor 6. Each branch operates in the existing rectifier mode when current is supplied from the motor 6 to the battery 3, such as during charging or vehicle kinetic energy recovery. Furthermore, when the first switch 11 and the second switch 12 are normally closed, the first converter 1 can be controlled to be inoperative, that is, all switches of the first converter 1 are turned off. When the first switch 11 is opened, the second switch 12 is closed, and the charging switch 5 is closed, the first converter 1 is controlled to enter interleaved parallel boost (BOOST) mode. Current flows from the charging port 4 through the third branch of the first converter connected to the third phase line 63 and enters the motor 6. Current is then output in parallel to the battery 3 via the first branch of the first converter connected to the first phase line 61 and the second branch of the first converter connected to the second phase line 62. The first branch of the first converter and the second branch of the first converter act as BOOST branches, each operating for half a cycle. When the first branch of the first converter is operating, the switches in the first branch are turned on or off by pulse width modulation (PWM) signals using existing boost control signals. When the second branch of the first converter is operating, the switches in the second branch are turned on or off by PWM signals using existing boost control signals. When the second switch 12 is disconnected and the first switch 11 is closed, the first converter 1 can be controlled to enter interleaved parallel buck (BUCK) mode. Current flows from the charging port 4 through the second branch of the first converter and the third branch of the first converter, respectively, into the motor 6, and then output to the battery 3 through the first branch of the first converter. The second branch of the first converter and the third branch of the first converter act as buck branches, each operating for half a cycle. When the second branch of the first converter is operating, the switches in the second branch of the first converter are turned on or off by PWM signals using existing buck control signals. When the third branch of the first converter is operating, the switches in the third branch of the first converter are turned on or off by PWM signals using existing buck control signals. By adopting the interleaved parallel mode, the output ripple is reduced and high power requirements are met.

[0081] In some embodiments, the first phase line 61 is a U-phase line, the second phase line 62 is a V-phase line, and the third phase line 63 is a W-phase line.

[0082] The vehicle-driven charging circuit of the present invention adds a first switch and a second switch, allowing the first converter to add additional boost charging and buck-and-current-increasing charging functions to its existing inverter function. By reusing the inverter and motor, the overall cost is optimized and the volume is minimized. While meeting vehicle performance requirements, the present invention can adapt to different battery pack voltage platforms without changing the EPT specifications, facilitating the platformization of EPT. Externally discharging users can charge using charging piles with different voltage platforms, achieving both charging station-agnostic charging and current-increasing performance, maximizing the use of the charging pile's output power and achieving the fastest recharging speed.

[0083] In one embodiment, the first branch of the first converter includes: a first switch tube 13 and a second switch tube 14; the second branch of the first converter includes: a third switch tube 15 and a fourth switch tube 16; the third branch of the first converter includes: a fifth switch tube 17 and a sixth switch tube 18;

[0084] A first end of the first switching transistor 13 is connected to the battery 3 , a first end of the first switching transistor 13 is connected to a first end of the third switching transistor 15 via the second switch 12 , a first end of the third switching transistor 15 is connected to a first end of the fifth switching transistor 17 via the first switch 11 , a first end of the fifth switching transistor 17 is connected to the positive electrode of the charging port 4 via the charging switch 5 , a second end of the second switching transistor 14 , a second end of the fourth switching transistor 16 , and a second end of the sixth switching transistor 18 are respectively connected to the negative electrode of the battery 3 and the negative electrode of the charging port 4 , a second end of the first switching transistor 13 and a first end of the second switching transistor 14 are respectively connected to a first phase line 61 of the motor 6 , a second end of the third switching transistor 15 and a first end of the fourth switching transistor 16 are respectively connected to a second phase line 62 of the motor 6 , and a second end of the fifth switching transistor 17 and a first end of the sixth switching transistor 18 are respectively connected to a third phase line 63 of the motor 6 ; or

[0085] The first end of the first switching transistor 13, the first end of the third switching transistor 15, and the first end of the fifth switching transistor 17 are respectively connected to the positive electrode of the battery 3. The first end of the fifth switching transistor 17 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the second switching transistor 14 is connected to the negative electrode of the battery 3. The second switching transistor 14 is connected to the second end of the fourth switching transistor 16 via the second switch 12. The second end of the fourth switching transistor 16 is connected to the second end of the sixth switching transistor 18 via the first switch 11. The second end of the sixth switching transistor 18 is connected to the negative electrode of the charging port 4. The second end of the first switching transistor 13 and the first end of the second switching transistor 14 are respectively connected to the first phase line 61 of the motor 6. The second end of the third switching transistor 15 and the first end of the fourth switching transistor 16 are respectively connected to the second phase line 62 of the motor 6. The second end of the fifth switching transistor 17 and the first end of the sixth switching transistor 18 are respectively connected to the third phase line 63 of the motor 6.

[0086] Specifically, the first switch 11 and the second switch 12 can be located on the positive line. Figure 1 As shown, the first branch of the first converter includes: a first switch tube 13 and a second switch tube 14, the second branch of the first converter includes: a third switch tube 15 and a fourth switch tube 16, and the third branch of the first converter includes: a fifth switch tube 17 and a sixth switch tube 18;

[0087] A first end of the first switching transistor 13 is connected to the battery 3 . The first end of the first switching transistor 13 is connected to the first end of the third switching transistor 15 via the second switch 12 . The first end of the third switching transistor 15 is connected to the first end of the fifth switching transistor 17 via the first switch 11 . The first end of the fifth switching transistor 17 is connected to the positive electrode of the charging port 4 via the charging switch 5 . The second end of the second switching transistor 14 , the second end of the fourth switching transistor 16 , and the second end of the sixth switching transistor 18 are respectively connected to the negative electrode of the battery 3 and the negative electrode of the charging port 4 . The second end of the first switching transistor 13 and the first end of the second switching transistor 14 are respectively connected to the first phase line 61 of the motor 6 . The second end of the third switching transistor 15 and the first end of the fourth switching transistor 16 are respectively connected to the second phase line 62 of the motor 6 . The second end of the fifth switching transistor 17 and the first end of the sixth switching transistor 18 are respectively connected to the third phase line 63 of the motor 6 .

[0088] In some embodiments, it also includes: a seventh capacitor 107 located between the first branch of the first converter and the battery 3, and an eighth capacitor 108 located between the third branch of the first converter and the charging switch 5, the seventh capacitor 107 is respectively connected to the positive and negative poles of the battery 3, and the eighth capacitor 108 is respectively connected to the positive and negative poles of the charging port 4.

[0089] like Figure 3 As shown, when the first switch 11 is disconnected, the second switch 12 is closed, and the charging switch 5 is closed, the fifth switch tube 17 is controlled to be turned on, and the sixth switch tube 18 is turned off, the first converter 1 can enter the staggered parallel boost (BOOST) mode, and the current i enters the motor 6 from the charging port 4 through the fifth switch tube 17, and then is output to the battery 3 in parallel through the first branch of the first converter and the second branch of the first converter respectively. The first branch of the first converter and the second branch of the first converter serve as BOOST branches and work for half a cycle respectively. When the first branch of the first converter is working, the first switch tube 13 and the second switch tube 14 of the first branch of the first converter are turned on or off by the PWM signal using the existing BOOST control signal. When the second branch of the first converter is working, the third switch tube 15 and the fourth switch tube 16 of the second branch of the first converter are turned on or off by the PWM signal using the existing BOOST control signal. As shown Figure 4 As shown, when second switch 12 is disconnected and first switch 11 is closed, first switch 13 is turned on, and second switch 14 is turned off, first converter 1 enters interleaved parallel buck (BUCK) mode. Current i flows from charging port 4 through the second branch of the first converter and the third branch of the first converter, respectively, into motor 6, and then is output to battery 3 via first switch 13. The second branch of the first converter and the third branch of the first converter serve as buck branches, each operating for half a cycle. When the second branch of the first converter is operating, the third switch 15 and the fourth switch 16 of the second branch of the first converter are turned on or off by a PWM signal using existing buck control signals. When the third branch of the first converter is operating, the fifth switch 17 and the sixth switch 18 of the third branch of the first converter are turned on or off by a PWM signal using existing buck control signals. By adopting an interleaved parallel mode, output ripple is reduced and high power requirements are met.

[0090] On the other hand, Figure 7 As shown, the first switch 11 and the second switch 12 can be located at the negative line, the first branch of the first converter includes: a first switch tube 13 and a second switch tube 14, the second branch of the first converter includes: a third switch tube 15 and a fourth switch tube 16, and the third branch of the first converter includes: a fifth switch tube 17 and a sixth switch tube 18;

[0091] The first end of the first switching transistor 13, the first end of the third switching transistor 15, and the first end of the fifth switching transistor 17 are respectively connected to the positive electrode of the battery 3. The first end of the fifth switching transistor 17 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the second switching transistor 14 is connected to the negative electrode of the battery 3. The second switching transistor 14 is connected to the second end of the fourth switching transistor 16 via the second switch 12. The second end of the fourth switching transistor 16 is connected to the second end of the sixth switching transistor 18 via the first switch 11. The second end of the sixth switching transistor 18 is connected to the negative electrode of the charging port 4. The second end of the first switching transistor 13 and the first end of the second switching transistor 14 are respectively connected to the first phase line 61 of the motor 6. The second end of the third switching transistor 15 and the first end of the fourth switching transistor 16 are respectively connected to the second phase line 62 of the motor 6. The second end of the fifth switching transistor 17 and the first end of the sixth switching transistor 18 are respectively connected to the third phase line 63 of the motor 6.

[0092] In one embodiment, the first branch of the first converter includes: an eleventh switch 111, a twelfth switch 112, a thirteenth switch 113, a fourteenth switch 114, a first capacitor 101, and a second capacitor 102; the second branch of the first converter includes: a fifteenth switch 115, a sixteenth switch 116, a seventeenth switch 117, an eighteenth switch 118, a third capacitor 103, and a fourth capacitor 104; and the third branch of the first converter includes: a nineteenth switch 119, a twentieth switch 120, a twenty-first switch 121, a twenty-second switch 122, a fifth capacitor 105, and a sixth capacitor 106.

[0093] A first end of the eleventh switch transistor 111 is connected to the battery 3. The first end of the eleventh switch transistor 111 is connected to the first end of the fifteenth switch transistor 115 via the second switch 12. The first end of the fifteenth switch transistor 115 is connected to the first end of the nineteenth switch transistor 119 via the first switch 11. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112, the second end of the sixteenth switch transistor 116, and the second end of the twentieth switch transistor 120 are respectively connected to the negative electrode of the battery 3 and the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the first end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The second end of the thirteenth switch transistor 113 is connected to the second end of the fourteenth switch transistor 114. The first end of the fourteenth switch transistor 114 is connected to the positive electrode of the battery 3 via the first capacitor 101. the first end of the 21st switch 121 is connected to the third phase line 63 of the motor 6, the second end of the 21st switch 121 is connected to the second end of the 22nd switch 122, and the first end of the 22nd switch 122 is connected to the positive electrode of the battery 3 through the fifth capacitor 105 and the negative electrode of the battery 3 through the sixth capacitor 106; or

[0094] A first end of the eleventh switch transistor 111 is connected to the battery 3. The first end of the eleventh switch transistor 111 is connected to the first end of the fifteenth switch transistor 115 via the second switch 12. The first end of the fifteenth switch transistor 115 is connected to the first end of the nineteenth switch transistor 119 via the first switch 11. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112, the second end of the sixteenth switch transistor 116, and the second end of the twentieth switch transistor 120 are respectively connected to the negative electrode of the battery 3 and the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the second end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The first end of the thirteenth switch transistor 113 is connected to the first end of the fourteenth switch transistor 114. The second end of the fourteenth switch transistor 114 is respectively connected to the positive electrode of the battery 3 via the first capacitor 101. the first end of the 21st switch 121 is connected to the first end of the 22nd switch 122, and the second end of the 22nd switch 122 is connected to the positive electrode of the battery 3 through the third capacitor 103 and to the negative electrode of the battery 3 through the fourth capacitor 104; the second end of the 19th switch 119, the first end of the 20th switch 120, and the second end of the 21st switch 121 are respectively connected to the third phase line 63 of the motor 6; the first end of the 21st switch 121 is connected to the first end of the 22nd switch 122; and the second end of the 22nd switch 122 is connected to the positive electrode of the battery 3 through the fifth capacitor 105 and to the negative electrode of the battery 3 through the sixth capacitor 106; or

[0095] The first end of the eleventh switch transistor 111, the first end of the fifteenth switch transistor 115, and the first end of the nineteenth switch transistor 119 are respectively connected to the positive electrode of the battery 3. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112 is connected to the negative electrode of the battery 3. The second end of the twelfth switch transistor 112 is connected to the second end of the sixteenth switch transistor 116 via the second switch 12. The second end of the sixteenth switch transistor 116 is connected to the second end of the twentieth switch transistor 120 via the first switch 11. The second end of the twentieth switch transistor 120 is connected to the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the first end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The second end of the thirteenth switch transistor 113 is connected to the second end of the fourteenth switch transistor 114. The first end of the fourteenth switch transistor 114 is respectively connected to the first capacitor 101. The positive electrode of the battery 3 is connected, and the negative electrode of the battery 3 is connected through the second capacitor 102. The second end of the fifteenth switch transistor 115, the first end of the sixteenth switch transistor 116, and the first end of the seventeenth switch transistor 117 are respectively connected to the second phase line 62 of the motor 6. The second end of the seventeenth switch transistor 117 is connected to the second end of the eighteenth switch transistor 118. The first end of the eighteenth switch transistor 118 is respectively connected to the positive electrode of the battery 3 through the third capacitor 103 and to the negative electrode of the battery 3 through the fourth capacitor 104. The second end of the nineteenth switch transistor 119, the first end of the twentieth switch transistor 120, and the first end of the twenty-first switch transistor 121 are respectively connected to the third phase line 63 of the motor 6. The second end of the twenty-first switch transistor 121 is connected to the second end of the twenty-second switch transistor 122. The first end of the twenty-second switch transistor 122 is respectively connected to the positive electrode of the battery 3 through the fifth capacitor 105 and to the negative electrode of the battery 3 through the sixth capacitor 106.

[0096] The first end of the eleventh switch transistor 111, the first end of the fifteenth switch transistor 115, and the first end of the nineteenth switch transistor 119 are respectively connected to the positive electrode of the battery 3. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112 is connected to the negative electrode of the battery 3. The second end of the twelfth switch transistor 112 is connected to the second end of the sixteenth switch transistor 116 via the second switch 12. The second end of the sixteenth switch transistor 116 is connected to the second end of the twentieth switch transistor 120 via the first switch 11. The second end of the twentieth switch transistor 120 is connected to the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the second end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The first end of the thirteenth switch transistor 113 is connected to the first end of the fourteenth switch transistor 114. The second end of the fourteenth switch transistor 114 is connected to the first phase line 61 of the motor 6 via the first capacitor 101. The positive electrode of the battery 3 is connected and connected to the negative electrode of the battery 3 through the second capacitor 102. The second end of the fifteenth switching transistor 115, the first end of the sixteenth switching transistor 116, and the second end of the seventeenth switching transistor 117 are respectively connected to the second phase line 62 of the motor 6. The first end of the seventeenth switching transistor 117 is connected to the first end of the eighteenth switching transistor 118. The second end of the eighteenth switching transistor 118 is respectively connected to the positive electrode of the battery 3 through the third capacitor 103 and to the negative electrode of the battery 3 through the fourth capacitor 104. The second end of the nineteenth switching transistor 119, the first end of the twentieth switching transistor 120, and the second end of the twenty-first switching transistor 121 are respectively connected to the third phase line 63 of the motor 6. The first end of the twenty-first switching transistor 121 is connected to the first end of the twenty-second switching transistor 122. The second end of the twenty-second switching transistor 122 is respectively connected to the positive electrode of the battery 3 through the fifth capacitor 105 and to the negative electrode of the battery 3 through the sixth capacitor 106.

[0097] Specifically, the power topology of the first converter of the aforementioned circuit is two-level. In addition to being two-level, the power topology of the first converter can also be three-level. Figure 8 As shown, it is a circuit diagram in which the first switch 11 and the second switch 12 are located on the positive line and the power topology is three-level, wherein:

[0098] The first branch of the first converter includes: an eleventh switching transistor 111, a twelfth switching transistor 112, a thirteenth switching transistor 113, a fourteenth switching transistor 114, a first capacitor 101, and a second capacitor 102; the second branch of the first converter includes: a fifteenth switching transistor 115, a sixteenth switching transistor 116, a seventeenth switching transistor 117, an eighteenth switching transistor 118, a third capacitor 103, and a fourth capacitor 104; and the third branch of the first converter includes: a nineteenth switching transistor 119, a twentieth switching transistor 120, a twenty-first switching transistor 121, a twenty-second switching transistor 122, a fifth capacitor 105, and a sixth capacitor 106;

[0099] A first end of the eleventh switch transistor 111 is connected to the battery 3. The first end of the eleventh switch transistor 111 is connected to the first end of the fifteenth switch transistor 115 via the second switch 12. The first end of the fifteenth switch transistor 115 is connected to the first end of the nineteenth switch transistor 119 via the first switch 11. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112, the second end of the sixteenth switch transistor 116, and the second end of the twentieth switch transistor 120 are respectively connected to the negative electrode of the battery 3 and the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the first end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The second end of the thirteenth switch transistor 113 is connected to the second end of the fourteenth switch transistor 114. The first end of the fourteenth switch transistor 114 is connected to the positive electrode of the battery 3 via the first capacitor 101. The first end of the fifteenth switch transistor 115 is connected to the negative electrode of the battery 3 via the second capacitor 102. The first end of the sixteenth switch transistor 116 and the first end of the seventeenth switch transistor 117 are respectively connected to the second phase line 62 of the motor 6. The second end of the seventeenth switch transistor 117 is connected to the second end of the eighteenth switch transistor 118. The first end of the eighteenth switch transistor 118 is respectively connected to the positive electrode of the battery 3 via the third capacitor 103 and to the negative electrode of the battery 3 via the fourth capacitor 104. The second end of the nineteenth switch transistor 119, the first end of the twentieth switch transistor 120, and the first end of the twenty-first switch transistor 121 are respectively connected to the third phase line 63 of the motor 6. The second end of the twenty-first switch transistor 121 is connected to the second end of the twenty-second switch transistor 122. The first end of the twenty-second switch transistor 122 is respectively connected to the positive electrode of the battery 3 via the fifth capacitor 105 and to the negative electrode of the battery 3 via the sixth capacitor 106.

[0100] In the above embodiment, the first ends of the thirteenth switch tube 113 and the fourteenth switch tube 114 are connected, the first ends of the seventeenth switch tube 117 and the eighteenth switch tube 118 are connected, and the first ends of the twenty-first switch tube 121 and the twenty-second switch tube 122 are connected.

[0101] In another embodiment, the second ends of the thirteenth switch transistor 113 and the fourteenth switch transistor 114 are connected, the second ends of the seventeenth switch transistor 117 and the eighteenth switch transistor 118 are connected, and the second ends of the twenty-first switch transistor 121 and the twenty-second switch transistor 122 are connected. Specifically:

[0102] The first end of the eleventh switch transistor 111, the first end of the fifteenth switch transistor 115, and the first end of the nineteenth switch transistor 119 are respectively connected to the positive electrode of the battery 3. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112 is connected to the negative electrode of the battery 3. The second end of the twelfth switch transistor 112 is connected to the second end of the sixteenth switch transistor 116 via the second switch 12. The second end of the sixteenth switch transistor 116 is connected to the second end of the twentieth switch transistor 120 via the first switch 11. The second end of the twentieth switch transistor 120 is connected to the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the second end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The first end of the thirteenth switch transistor 113 is connected to the first end of the fourteenth switch transistor 114. The second end of the fourteenth switch transistor 114 is connected to the first phase line 61 of the motor 6 via the first capacitor 101. The positive electrode of the battery 3 is connected and connected to the negative electrode of the battery 3 through the second capacitor 102. The second end of the fifteenth switching transistor 115, the first end of the sixteenth switching transistor 116, and the second end of the seventeenth switching transistor 117 are respectively connected to the second phase line 62 of the motor 6. The first end of the seventeenth switching transistor 117 is connected to the first end of the eighteenth switching transistor 118. The second end of the eighteenth switching transistor 118 is respectively connected to the positive electrode of the battery 3 through the third capacitor 103 and to the negative electrode of the battery 3 through the fourth capacitor 104. The second end of the nineteenth switching transistor 119, the first end of the twentieth switching transistor 120, and the second end of the twenty-first switching transistor 121 are respectively connected to the third phase line 63 of the motor 6. The first end of the twenty-first switching transistor 121 is connected to the first end of the twenty-second switching transistor 122. The second end of the twenty-second switching transistor 122 is respectively connected to the positive electrode of the battery 3 through the fifth capacitor 105 and to the negative electrode of the battery 3 through the sixth capacitor 106.

[0103] The first branch of the first converter, the second branch of the first converter, and the third branch of the first converter are three-level power topologies.

[0104] In some embodiments, it also includes: a tenth capacitor 1010 located between the first branch of the first converter and the battery 3, an eleventh capacitor 1011 located between the first branch of the first converter and the second branch of the first converter, and a twelfth capacitor 1012 located between the second branch of the first converter and the third branch of the first converter. The tenth capacitor 1010, the eleventh capacitor 1011, and the twelfth capacitor 1012 are respectively connected to the positive and negative poles of the battery 3 and the charging port 4.

[0105] When the first switch 11 and the second switch 12 are normally closed, the first converter 1 is controlled to enter inverter mode or rectifier mode. Each branch operates in the existing inverter mode when current is supplied from the battery 3 to the motor 6. Each branch operates in the existing rectifier mode when current is supplied from the motor 6 to the battery 3, such as during charging or vehicle kinetic energy recovery. When the first switch 11 is disconnected, the second switch 12 is closed, and the charging switch 5 is closed, the first converter 1 is controlled to enter interleaved parallel boost (BOOST) mode. The thirteenth, fourteenth, seventeenth, eighteenth, and twenty-first and twenty-second switches 113, 114, 117, 118, 121, and 122 are all turned off. At this point, consistent with a two-level topology, current flows from the charging port 4 through the third branch of the first converter connected to the third phase line 63, enters the motor 6, and is then output in parallel to the battery 3 via the first branch of the first converter connected to the first phase line 61 and the second branch of the first converter connected to the second phase line 62. The first branch of the first converter and the second branch of the first converter serve as boost branches, each operating for half a cycle. When the first branch of the first converter is operating, the switches in the first branch of the first converter are turned on or off by a pulse width modulation (PWM) signal using an existing boost control signal. When the second branch of the first converter is operating, the switches in the second branch of the first converter are turned on or off by a PWM signal using an existing boost control signal. When the second switch 12 is disconnected and the first switch 11 is closed, the first converter 1 enters interleaved parallel buck (BUCK) mode. The thirteenth, fourteenth, seventeenth, eighteenth, and twenty-first switches 113, 114, 117, 118, 121, and 122 are all turned off. This is consistent with a two-level topology. Current flows from the charging port 4 through the second and third branches of the first converter, respectively, into the motor 6, and then is output to the battery 3 via the first branch of the first converter. The second and third branches of the first converter function as buck (BUCK) branches, each operating for half a cycle. When the second branch of the first converter is operating, the switches in the second branch are turned on or off by PWM signals using existing buck control signals. When the third branch of the first converter is operating, the switches in the third branch are turned on or off by PWM signals using existing buck control signals. By adopting an interleaved parallel mode, output ripple is reduced and high power requirements can be met.

[0106] The first switch 11 and the second switch 12 can also be located on the negative line, such as Figure 9 As shown, it is a circuit diagram in which the first switch 11 and the second switch 12 are located on the negative line and the power topology is three-level, wherein:

[0107] The first branch of the first converter includes: an eleventh switching transistor 111, a twelfth switching transistor 112, a thirteenth switching transistor 113, a fourteenth switching transistor 114, a first capacitor 101, and a second capacitor 102; the second branch of the first converter includes: a fifteenth switching transistor 115, a sixteenth switching transistor 116, a seventeenth switching transistor 117, an eighteenth switching transistor 118, a third capacitor 103, and a fourth capacitor 104; and the third branch of the first converter includes: a nineteenth switching transistor 119, a twentieth switching transistor 120, a twenty-first switching transistor 121, a twenty-second switching transistor 122, a fifth capacitor 105, and a sixth capacitor 106;

[0108] The first end of the eleventh switch transistor 111, the first end of the fifteenth switch transistor 115, and the first end of the nineteenth switch transistor 119 are respectively connected to the positive electrode of the battery 3. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112 is connected to the negative electrode of the battery 3. The second end of the twelfth switch transistor 112 is connected to the second end of the sixteenth switch transistor 116 via the second switch 12. The second end of the sixteenth switch transistor 116 is connected to the second end of the twentieth switch transistor 120 via the first switch 11. The second end of the twentieth switch transistor 120 is connected to the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the first end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The second end of the thirteenth switch transistor 113 is connected to the second end of the fourteenth switch transistor 114. The first end of the fourteenth switch transistor 114 is respectively connected to the first capacitor 101. The positive electrode of the battery 3 is connected and connected to the negative electrode of the battery 3 through the second capacitor 102. The second end of the fifteenth switching transistor 115, the first end of the sixteenth switching transistor 116, and the first end of the seventeenth switching transistor 117 are respectively connected to the second phase line 62 of the motor 6. The second end of the seventeenth switching transistor 117 is connected to the second end of the eighteenth switching transistor 118. The first end of the eighteenth switching transistor 118 is respectively connected to the positive electrode of the battery 3 through the third capacitor 103 and to the negative electrode of the battery 3 through the fourth capacitor 104. The second end of the nineteenth switching transistor 119, the first end of the twentieth switching transistor 120, and the first end of the twenty-first switching transistor 121 are respectively connected to the third phase line 63 of the motor 6. The second end of the twenty-first switching transistor 121 is connected to the second end of the twenty-second switching transistor 122. The first end of the twenty-second switching transistor 122 is respectively connected to the positive electrode of the battery 3 through the fifth capacitor 105 and to the negative electrode of the battery 3 through the sixth capacitor 106.

[0109] In the above embodiment, the first ends of the thirteenth switch tube 113 and the fourteenth switch tube 114 are connected, the first ends of the seventeenth switch tube 117 and the eighteenth switch tube 118 are connected, and the first ends of the twenty-first switch tube 121 and the twenty-second switch tube 122 are connected.

[0110] In another embodiment, the second ends of the thirteenth switch transistor 113 and the fourteenth switch transistor 114 are connected, the second ends of the seventeenth switch transistor 117 and the eighteenth switch transistor 118 are connected, and the second ends of the twenty-first switch transistor 121 and the twenty-second switch transistor 122 are connected. Specifically:

[0111] The first end of the eleventh switch transistor 111, the first end of the fifteenth switch transistor 115, and the first end of the nineteenth switch transistor 119 are respectively connected to the positive electrode of the battery 3. The first end of the nineteenth switch transistor 119 is connected to the positive electrode of the charging port 4 via the charging switch 5. The second end of the twelfth switch transistor 112 is connected to the negative electrode of the battery 3. The second end of the twelfth switch transistor 112 is connected to the second end of the sixteenth switch transistor 116 via the second switch 12. The second end of the sixteenth switch transistor 116 is connected to the second end of the twentieth switch transistor 120 via the first switch 11. The second end of the twentieth switch transistor 120 is connected to the negative electrode of the charging port 4. The second end of the eleventh switch transistor 111, the first end of the twelfth switch transistor 112, and the second end of the thirteenth switch transistor 113 are respectively connected to the first phase line 61 of the motor 6. The first end of the thirteenth switch transistor 113 is connected to the first end of the fourteenth switch transistor 114. The second end of the fourteenth switch transistor 114 is connected to the first phase line 61 of the motor 6 via the first capacitor 101. The positive electrode of the battery 3 is connected and connected to the negative electrode of the battery 3 through the second capacitor 102. The second end of the fifteenth switching transistor 115, the first end of the sixteenth switching transistor 116, and the second end of the seventeenth switching transistor 117 are respectively connected to the second phase line 62 of the motor 6. The first end of the seventeenth switching transistor 117 is connected to the first end of the eighteenth switching transistor 118. The second end of the eighteenth switching transistor 118 is respectively connected to the positive electrode of the battery 3 through the third capacitor 103 and to the negative electrode of the battery 3 through the fourth capacitor 104. The second end of the nineteenth switching transistor 119, the first end of the twentieth switching transistor 120, and the second end of the twenty-first switching transistor 121 are respectively connected to the third phase line 63 of the motor 6. The first end of the twenty-first switching transistor 121 is connected to the first end of the twenty-second switching transistor 122. The second end of the twenty-second switching transistor 122 is respectively connected to the positive electrode of the battery 3 through the fifth capacitor 105 and to the negative electrode of the battery 3 through the sixth capacitor 106.

[0112] like Figure 2As shown, in one embodiment, it further includes: a second converter 2 connected to the battery 3 and the first converter 1, and the second converter 2 is controllable to be in an interleaved parallel boost mode or an interleaved parallel buck mode.

[0113] Specifically, the circuits of the second converter 2 in boost mode and buck mode are consistent. When powered by a battery, it operates in interleaved parallel boost mode (BOOST), and when charging the battery, it operates in interleaved parallel buck mode (BUCK). Each branch conducts 180° and operates in interleaved parallel mode to reduce output ripple and meet high power requirements.

[0114] This embodiment can add a second converter as needed. The combination of the first converter and the second converter can match different battery pack voltage platforms without changing the EPT specifications while meeting the performance requirements of the entire vehicle, which is conducive to the platformization of EPT. For external discharge, users can use charging piles with different voltage platforms for charging, that is, charging is not picky about the pile, and the current can be increased at the same time, maximizing the use of the output power of the charging pile to achieve the fastest energy replenishment speed.

[0115] like Figure 1 As shown, in one embodiment, the second converter 2 includes: a first inductor 21, a second inductor 22, a seventh switching transistor 23, an eighth switching transistor 24, a ninth switching transistor 25, a tenth switching transistor 26, and a third switch 27. The first electrode of the seventh switching transistor 23 and the first electrode of the eighth switching transistor 24 are connected to the first end of the first inductor 21 and the first end of the second inductor 22 through the third switch 27. The first end of the first inductor 21 and the first end of the second inductor 22 are respectively connected to the first electrode of the battery 3. The second end of the ninth switching transistor 25 and the second end of the tenth switching transistor 26 are connected to the second electrode of the battery 3. The second end of the seventh switching transistor 23 and the first end of the ninth switching transistor 25 are respectively connected to the second end of the first inductor 21. The second end of the eighth switching transistor 24 and the first end of the tenth switching transistor 26 are respectively connected to the second end of the second inductor 22.

[0116] Specifically, when the third switch 27 is closed, the second converter 2 is controlled not to work, that is, all the switch tubes of the second converter 2 are controlled to be turned off;

[0117] When the third switch 27 is disconnected and the battery 3 is discharged, the second converter 2 is controlled to be in an interleaved parallel boost mode;

[0118] When the third switch 27 is disconnected and the battery 3 is charged, the second converter 2 is controlled to be in an interleaved parallel buck mode.

[0119] Specifically, if Figure 1As shown, the second converter 2 includes: a first inductor 21 , a second inductor 22 , a seventh switch 23 , an eighth switch 24 , a ninth switch 25 , a tenth switch 26 and a third switch 27 .

[0120] When the third switch 27 is closed, the remaining components are bypassed and the second converter 2 does not operate.

[0121] When the third switch 27 is disconnected, Figure 5 As shown, the current i from left to right can achieve the boost mode (BOOST); Figure 6 As shown, current i flowing from right to left enables buck mode (step-down mode). The same circuit is used in both directions. The seventh and ninth switches 23 and 25 serve as the first branch of the second converter, while the eighth and tenth switches 24 and 26 serve as the second branch of the second converter. The first and second branches of the second converter each operate 180° within a cycle. When the first branch of the second converter is operating, the seventh and ninth switches 23 and 25 are turned on or off according to the PWM signal. When the second branch of the second converter is operating, the eighth and tenth switches 24 and 26 are turned on or off according to the PWM signal. In boost mode, the PWM signal uses the existing boost control signal, while in buck mode, the PWM signal uses the existing buck control signal. This results in interleaved parallel operation, reducing output ripple and meeting high power requirements.

[0122] In some embodiments, the switch tube can be a power switch tube. The switch tube is preferably a silicon carbide metal oxide semiconductor field effect transistor (SiC MOSFET), with a first end being a drain (D electrode), a second end being a source (S electrode), and a third end being a control electrode (G electrode). The switch tube can also be an insulated gate bipolar transistor (IGBT), with a first end being a collector (C electrode), a second end being an emitter (E electrode), and a third end being a gate (G electrode). The on / off of the first and second ends is controlled by outputting a signal to the third end of the switch tube.

[0123] In some embodiments, a ninth capacitor 109 connected to the positive and negative electrodes of the battery 3 is further included.

[0124] like Figure 10 FIG. 1 is a flowchart of a control method for a vehicle driving and charging circuit according to an embodiment of the present invention, comprising:

[0125] Step S1001, obtaining vehicle operating conditions;

[0126] Step S1002 : According to the vehicle operating condition, the first converter 1 is controlled to be in inverter mode, rectifier mode, interleaved parallel boost mode, interleaved parallel buck mode or not in operation.

[0127] Specifically, the present invention can be applied to electronic devices with processing capabilities, such as a controller of a vehicle, such as an electronic control unit (ECU) of a vehicle.

[0128] First, step S1001 is executed to obtain the vehicle operating conditions, which include driving conditions, charging conditions, etc.

[0129] Then, step S1002 is executed to control the first converter 1 to operate in inverter mode, rectifier mode, interleaved parallel boost mode, interleaved parallel buck mode, or not operate according to the vehicle operating condition.

[0130] This embodiment controls the first converter to operate in inverter mode, rectifier mode, interleaved parallel boost mode, and interleaved parallel buck mode according to different vehicle operating conditions. This allows the matching of different battery pack voltage platforms without changing the EPT specifications while meeting the overall vehicle performance requirements, which is beneficial to the platformization of the EPT. Externally discharging users can use charging piles of different voltage platforms for charging, meaning that charging is not picky about the charging piles, while also increasing the current, maximizing the use of the output power of the charging piles and achieving the fastest energy replenishment speed.

[0131] In one embodiment, controlling the first converter 1 to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate according to the vehicle operating condition includes:

[0132] If the vehicle is in a driving condition or a vehicle kinetic energy recovery condition, the charging switch 5 is controlled to be disconnected, and the first switch 11 and the second switch 12 are controlled to be closed. In the driving condition, the first converter 1 is in an inverter mode, and in the vehicle kinetic energy recovery condition, the first converter 1 is in a rectifier mode.

[0133] When the voltage of the battery 3 is less than or equal to the first voltage threshold, if the vehicle is in a charging state and the output current of the charging pile is less than the battery current requirement, the first switch 11 is controlled to be closed, the second switch 12 is controlled to be open, the charging switch 5 is controlled to be closed, and the first converter 1 is in an interleaved parallel buck mode; or

[0134] When the voltage of the battery 3 is less than or equal to the first voltage threshold, if the vehicle is in a charging state and the output current of the charging pile meets the battery current requirement, the first switch 11 and the second switch 12 are controlled to be closed, the charging switch 5 is controlled to be closed, and the first converter 1 does not operate; or

[0135] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery 3, and the output current of the charging pile is less than the battery current demand, then the first switch 11 is controlled to be closed, the second switch 12 is disconnected, the charging switch 5 is controlled to be closed, and the first converter 1 is in an interleaved parallel buck mode; or

[0136] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery 3, and the output current of the charging pile meets the battery current requirement, then the first switch 11 and the second switch 12 are controlled to be closed, the charging switch 5 is controlled to be closed, and the first converter 1 does not operate; or

[0137] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery 3, the first switch 11 is controlled to be disconnected, the second switch 12 is controlled to be closed, the charging switch 5 is controlled to be closed, and the first converter 1 is in an interleaved parallel boost mode; or

[0138] When the voltage of the battery 3 is greater than the second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is greater than the voltage of the battery 3, the first switch 11 and the second switch 12 are controlled to be closed, the charging switch 5 is controlled to be closed, and the first converter 1 does not operate; or

[0139] When the voltage of the battery 3 is greater than the second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery 3, the first switch 11 is controlled to be disconnected, the second switch 12 is controlled to be closed, the charging switch 5 is controlled to be closed, and the first converter 1 is in an interleaved parallel boost mode.

[0140] Specifically, the voltage of the battery 3 is divided into the following situations.

[0141] 1. When the voltage of the battery 3 is less than or equal to the first voltage threshold, the first voltage threshold is preferably 500V.

[0142] 1.1 The vehicle uses a low-voltage battery pack. When the vehicle is driving normally, the first switch 11 and the second switch 12 are closed to control the first converter 1 to enter the inverter mode. When the vehicle is in kinetic energy recovery mode, the first converter 1 is controlled to enter the rectifier mode.

[0143] 1.2 Under charging conditions, when the output current and voltage of the charging pile (such as a 1000V / 600A charging pile) can meet the battery requirements, the charging switch 5 can be closed, and the first switch 11 and the second switch 12 can be closed. The first converter 1 enters the inverter mode and stops working, and the battery is directly charged.

[0144] Under charging conditions, when the output current of the charging pile is limited to less than the battery current demand, the first converter 1 can also be used to achieve step-down and step-up charging. Under low state of charge (SOC) conditions, the voltage is low and the battery current demand is large. The DC pile (such as 500V / 250A, 750V / 250A) is limited to an output current of 250A, but the power of the pile is not yet fully used. The first converter 1 can be used to achieve step-down and step-up charging to charge the battery with the full power of the charging pile, that is, close the charging switch 5, close the first switch 11, and disconnect the second switch 12. The first converter 1 enters the BUCK mode and receives the full-power DC output from the charging pile to achieve fast charging.

[0145] 2. When the voltage of the battery 3 is greater than the first voltage threshold and less than or equal to the second voltage threshold, the first voltage threshold is preferably 500V and the second voltage threshold is preferably 750V.

[0146] 2.1 The vehicle uses a low-voltage battery pack. When the vehicle is driving normally, the first switch 11 and the second switch 12 are closed to control the first converter 1 to enter the inverter mode. When the vehicle kinetic energy recovery mode is in operation, the first converter 1 is controlled to enter the rectifier mode.

[0147] 2.2 Under charging conditions, when the output current and voltage of the charging pile (such as a 1000V / 600A charging pile) can cover the battery requirements, the charging switch 5 can be closed, and the first switch 11 and the second switch 12 can be closed. The first converter 1 enters the inverter mode and stops working, and the battery is directly charged.

[0148] Under charging conditions, when the output current of the charging pile is limited to less than the battery current demand, the first converter 1 can also be used to achieve step-down and step-up charging. Under low SOC conditions, the voltage is low and the battery current demand is large. The DC pile (such as 750V / 250A) is limited to an output current of 250A, but the power of the pile is not yet fully used. The first converter 1 can be used to achieve step-down and step-up charging to charge the battery with the full power of the charging pile, that is, close the charging switch 5, close the first switch 11, and disconnect the second switch 12. The first converter 1 enters the BUCK mode and receives the full-power DC output from the charging pile to achieve fast charging.

[0149] 2.3 When the voltage of battery 3 exceeds the voltage of the charging pile, first converter 1 can also be used to achieve boost charging. For example, if the voltage of battery 3 exceeds 500V and a 500V charging pile cannot charge directly, the charging switch 5 and second switch 12 can be closed, and first switch 11 can be opened. First converter 1 enters BOOST mode. With the help of first converter 1 entering BOOST mode, the voltage of the charging pile is boosted to charge battery 3. This eliminates the need for an additional converter, and the cost and space increase is minimal. However, the function of matching low-voltage charging piles (such as 500V charging piles) is added, greatly facilitating user charging needs. First converter 1 uses an interleaved parallel circuit to meet the requirements of high power and low ripple.

[0150] 3. When the voltage of battery 3 is greater than the second voltage threshold

[0151] 3.1 When the vehicle is running normally, the first switch 11 and the second switch 12 are closed to control the first converter 1 to enter the inverter mode. When the vehicle kinetic energy recovery mode is in operation, the first converter 1 is controlled to enter the rectifier mode.

[0152] 3.2① In direct charging mode, when the charging pile (such as a 1000V / 600A charging pile) meets the voltage platform of battery 3, the charging switch 5 can be closed, and the first switch 11 and the second switch 12 can be closed, and the first converter 1 is controlled to stop working, and the charging pile directly charges the battery 3.

[0153] ② When the voltage of battery 3 exceeds the voltage of the charging pile, the first converter 1 enters the boost charging mode: for example, the voltage of battery 3 exceeds 750V, and the 500V or 750 charging pile cannot be charged directly. At this time, the charging switch 5 can be closed, the second switch 12 can be closed, and the first switch 11 can be disconnected. The first converter 1 enters the BOOST mode. With the help of the first converter 1 entering the BOOST mode, the voltage of the 500V or 750 pile is boosted to charge the battery 3. No additional converter is needed, and the cost and space are not increased much. However, the function of matching 500V and 750 charging piles is added, which greatly facilitates the user's charging needs; the first converter 1 adopts an interleaved parallel circuit to meet the needs of high power and small ripple.

[0154] In one embodiment, the vehicle drive charging circuit further includes: a second converter 2 connected to the battery 3 and the first converter 1, the second converter 2 being controllable to an interleaved parallel boost mode or an interleaved parallel buck mode, and controlling the first converter 1 to an inverter mode, a rectifier mode, an interleaved parallel boost mode, or an interleaved parallel buck mode according to the vehicle operating condition, including:

[0155] According to the vehicle operating conditions, the second converter 2 is controlled to be in interleaved parallel boost mode, interleaved parallel buck mode or not working, and the first converter 1 is controlled to be in inverter mode, rectifier mode, interleaved parallel boost mode, interleaved parallel buck mode or not working.

[0156] This embodiment can add a second converter as needed. The combination of the first converter and the second converter can match different battery pack voltage platforms without changing the EPT specifications while meeting the performance requirements of the entire vehicle, which is conducive to the platformization of EPT. For external discharge, users can use charging piles with different voltage platforms for charging, that is, charging is not picky about the pile, and the current can be increased at the same time, maximizing the use of the output power of the charging pile to achieve the fastest energy replenishment speed.

[0157] In one embodiment, according to the vehicle operating condition, controlling the second converter 2 to operate in an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate, and controlling the first converter 1 to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not operate, includes:

[0158] When the voltage of the battery 3 is less than or equal to the second voltage threshold, if the vehicle is in a driving condition, the charging switch 5 is controlled to be disconnected, the third switch 27 is controlled to be disconnected, the second converter 2 is in an interleaved parallel boost mode, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is in an inverter mode; or

[0159] When the voltage of the battery 3 is greater than the second voltage threshold, if the vehicle is in a driving condition, the charging switch 5 is controlled to be disconnected, the first switch 11 and the second switch 12 are controlled to be closed, the first converter 1 is in an inverter mode, and it is determined whether the voltage of the battery 3 meets the bus voltage requirement. If so, the third switch 27 is controlled to be closed, and the second converter 2 does not operate. Otherwise, the third switch 27 is controlled to be disconnected, and the second converter 2 is in an interleaved parallel boost mode; or

[0160] When the voltage of the battery 3 is less than or equal to the second voltage threshold, if the vehicle operating condition is the vehicle kinetic energy recovery condition, the third switch 27 is controlled to be disconnected, the second converter 2 is in the staggered parallel buck mode, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is in the rectification mode; or

[0161] When the voltage of the battery 3 is greater than the second voltage threshold, if the vehicle operating condition is the vehicle kinetic energy recovery condition, the third switch 27 is controlled to be closed, the second converter 2 is not operated, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is in the rectification mode; or

[0162] When the voltage of the battery 3 is less than or equal to the first voltage threshold, if the vehicle is in a charging state and the output current of the charging pile is less than the battery current requirement, the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be disconnected, the second converter 2 is in an interleaved parallel buck mode, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is not operated; or

[0163] When the voltage of the battery 3 is less than or equal to the first voltage threshold, if the vehicle is in a charging state and the output current of the charging pile is less than the battery current requirement, the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 is not operated, the first switch 11 is controlled to be closed, the second switch 12 is disconnected, and the first converter 1 is in an interleaved parallel buck mode; or

[0164] When the voltage of the battery 3 is less than or equal to the first voltage threshold, if the vehicle operating condition is a charging condition and the output current of the charging pile meets the battery current requirement, the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 is not operated, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is not operated; or

[0165] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery 3, and the output current of the charging pile is less than the battery current demand, then the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be disconnected, the second converter 2 is in an interleaved parallel buck mode, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is not operated; or

[0166] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery 3, and the output current of the charging pile is less than the battery current demand, then the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 does not work, the first switch 11 is controlled to be closed, the second switch 12 is disconnected, and the first converter 1 is in an interleaved parallel buck mode; or

[0167] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery 3, and the output current of the charging pile meets the battery current requirement, then the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 is not operated, the first switch 11 and the second switch 12 are controlled to be closed, and the first converter 1 is not operated; or

[0168] When the voltage of the battery 3 is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle is in a charging state and the output voltage of the charging pile is less than or equal to the voltage of the battery 3, the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 is not operated, the first switch 11 is controlled to be opened, the second switch 12 is controlled to be closed, and the first converter 1 is in an interleaved parallel boost mode;

[0169] When the voltage of the battery 3 is greater than the second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is greater than the voltage of the battery 3, the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 is not operated, the first switch 11 and the second switch 12 are controlled to be closed, the first converter 1 is not operated, and the charging switch 5 is controlled to be closed; or

[0170] When the voltage of the battery 3 is greater than the second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery 3, the charging switch 5 is controlled to be closed, the third switch 27 is controlled to be closed, the second converter 2 does not work, the first switch 11 is controlled to be disconnected, the second switch 12 is closed, and the first converter 1 is in an interleaved parallel boost mode.

[0171] Specifically, after the second converter 2 is added, the following situations are classified according to the voltage of the battery 3 .

[0172] 1. When the voltage of the battery 3 is less than or equal to the first voltage threshold, the first voltage threshold is preferably 500V.

[0173] 1.1 The vehicle utilizes a low-voltage battery pack. During normal vehicle operation, closing the first and second switches 11 and 12 activates the first converter 1 in inverter mode. Disconnecting the third switch 27 activates the second converter 2, enabling boost mode (from left to right). This provides the following advantages: First, the vehicle's dynamic performance remains unchanged without changing the EPT to accommodate the low-voltage battery pack voltage platform. Second, BOOST voltage regulation allows for varying bus voltages at varying motor speeds, achieving the highest efficiency of the EPT.

[0174] 1.2① Second converter 2 achieves voltage reduction during vehicle kinetic energy recovery: Disconnect third switch 27, and second converter 2 can achieve buck mode (BUCK) from right to left, achieving matching between the bus voltage and the battery pack voltage, that is, meeting the inverter feeding requirements.

[0175] ② In the charging condition, when the output current of the charging pile is limited to less than the battery current demand, the second converter 2 is used to realize step-down and step-up charging. Among them, under the low SOC condition, the voltage is low and the battery current demand is large. The DC pile (such as 500V / 250A, 750V / 250A) is limited to an output current of 250A, but the power of the pile is not yet fully used. At this time, the second converter 2 is used to realize step-down and step-up charging to charge the battery with the full power of the charging pile, that is, the third switch 27 is disconnected, the first switch 11, the charging switch 5, and the second switch 12 are closed, and the full-power DC output from the charging pile is received to realize fast charging.

[0176] Furthermore, by adding the third switch 27, it is possible to cope with situations where the second converter 2 is not required to operate, for example: 1. The charging station directly charges the battery 3; 2. The second converter 2 fails and the inverter still needs to operate. In this case, the third switch 27 can be closed to control the second converter 2 to stop operating.

[0177] In addition, when the output current and voltage of the charging pile (such as a 1000V / 600A charging pile) can cover the battery requirements, the third switch 27, the first switch 11, the charging switch 5, and the second switch 12 can be closed to control the second converter 2 not to work, control the first converter 1 not to work, and directly charge the battery to reduce the working loss of the second converter 2.

[0178] Finally, when the second converter 2 fails, the third switch 27 is closed to short-circuit the second converter 2, and the battery 3 is directly connected to the first converter 1, which can meet the inverter low-power drive mode and facilitate customers to return to the 4S shop for repairs.

[0179] ③ In the charging condition, when the output current of the charging pile is limited to less than the battery current demand, the first converter 1 can also be used to achieve step-down and step-up charging. Under low SOC conditions, the voltage is low and the battery current demand is large. The DC pile (such as 500V / 250A, 750V / 250A) is limited to an output current of 250A, but the power of the pile is not yet fully used. At this time, the first converter 1 operates in BUCK mode to charge the battery with the full power of the charging pile, that is, close the third switch 27, close the first switch 11, the charging switch 5, and disconnect the second switch 12. The first converter 1 enters the BUCK mode and receives the full-power DC output from the charging pile to achieve fast charging. This mode complements the second converter 2 used to achieve step-down and step-up charging.

[0180] 2. When the voltage of battery 3 is greater than the second voltage threshold and less than or equal to the first voltage threshold

[0181] 2.1 The vehicle utilizes a low-voltage battery pack. During normal vehicle operation, closing the first and second switches 11 and 12 activates the first converter 1 in inverter mode. Disconnecting the third switch 27 activates the second converter 2 in boost mode, moving from left to right. This provides the following advantages: First, the vehicle's dynamic performance remains unchanged without changing the EPT to accommodate the low-voltage battery 3 voltage platform. Second, BOOST voltage regulation allows for varying bus voltages at varying motor speeds, achieving the highest efficiency of the EPT.

[0182] 2.2① The second converter 2 realizes voltage reduction during vehicle kinetic energy recovery: by disconnecting the third switch 27, the second converter 2 can realize the buck mode (BUCK) from right to left, so that the bus voltage matches the voltage of the battery 3, that is, the inverter feeding requirement is met.

[0183] ② In the charging condition, when the output current of the charging pile is limited to less than the battery current demand, the second converter 2 is used to realize step-down and step-up charging. Among them, under the low SOC condition, the voltage is low and the battery current demand is large. The DC pile (750V / 250A) is limited to an output current of 250A, but the power of the pile is not yet fully used. At this time, the second converter 2 is used to realize step-down and step-up charging to charge the battery with the full power of the charging pile, that is, the third switch 27 is disconnected, the first switch 11, the charging switch 5, and the second switch 12 are closed, and the full-power DC output from the charging pile is received to realize fast charging.

[0184] In addition, by adding a third switch 27, situations where the second converter 2 is not required to operate can be addressed, such as: 1. The charging pile directly charges the battery 3; 2. The second converter 2 fails and the inverter also needs to operate. In this case, the third switch 27 can be closed to control the second converter 2 to not operate. For example, when the output current and voltage of the charging pile (such as a 1000V / 600A charging pile) can cover the battery requirements, the third switch 27, the first switch 11, the charging switch 5, and the second switch 12 can be closed to control the second converter 2 and the first converter 1 to not operate, directly charging the battery and reducing the operating loss of the second converter 2.

[0185] Finally, when the second converter 2 fails, the third switch 27 is closed to short-circuit the second converter 2, and the battery 3 is directly connected to the first converter 1, which can meet the inverter low-power drive mode and facilitate customers to return to the 4S shop for repairs.

[0186] ③ In the charging condition, when the output current of the charging pile is limited to less than the battery current demand, the first converter 1 can also be used to achieve step-down and step-up charging. Under low SOC conditions, the voltage is low and the battery current demand is large. The DC pile (such as 750V / 250A) is limited to an output current of 250A, but the power of the pile is not yet fully used. At this time, the first converter 1 operates in BUCK mode to charge the battery with the full power of the charging pile, that is, the third switch 27 is closed, the first switch 11 and the charging switch 5 are closed, and the second switch 12 is disconnected. The first converter 1 enters the BUCK mode and receives the full-power DC output from the charging pile to achieve fast charging. This mode complements the second converter 2 used to achieve step-down and step-up charging.

[0187] 2.3① In the charging condition, when the output voltage of the charging pile is less than or equal to the voltage of the battery 3, the first converter 1 is used to achieve boost charging: at this time, the voltage of the battery 3 exceeds 500V, and the 500V charging pile cannot be charged directly. At this time, the third switch 27, the charging switch 5, and the second switch 12 can be closed, and the first switch 11 can be disconnected. The first converter 1 enters the BOOST mode, and the second converter 2 is controlled not to work. With the help of the first converter 1 entering the BOOST mode, the voltage of the low-voltage charging pile (for example, a 500V pile) is boosted to charge the battery 3. No additional converter is needed, and the cost and space increase is not large. However, the function of matching the 500V charging pile is added, which greatly facilitates the user's charging needs; the first converter 1 adopts an interleaved parallel circuit to meet the requirements of high power and small ripple.

[0188] 3. When the voltage of battery 3 is greater than the second voltage threshold

[0189] 3.1 During normal vehicle operation, the first switch 11 and the second switch 12 are closed, and the first converter 1 enters inverter mode. At this point, the bus voltage is determined to determine whether it needs to be adjusted based on the vehicle's bus voltage requirements. If the battery output voltage meets the optimal bus voltage required for vehicle operation, the third switch 27 is closed, disabling the second converter 2 and minimizing converter losses. If necessary, the third switch 27 is opened, and the second converter 2 enters boost mode to meet optimal system efficiency requirements.

[0190] 3.2① In direct charging mode, when the charging pile (such as a 1000V / 600A charging pile) meets the voltage platform of battery 3, the third switch 27, the first switch 11, the charging switch 5, and the second switch 12 are closed, and the second converter 2 and the first converter 1 are controlled to not work. The charging pile directly charges battery 3.

[0191] ② Under charging conditions, when the charging pile output voltage is less than or equal to the battery 3 voltage, the first converter 1 enters boost charging mode. For example, when the battery 3 voltage exceeds 750V and a 500V or 750V charging pile cannot charge directly, the third switch 27, charging switch 5, and second switch 12 can be closed, and the first switch 11 can be opened, causing the first converter 1 to enter boost mode. With the first converter 1 in boost mode, the voltage of the 500V or 750V pile can be boosted to charge the battery 3. This eliminates the need for an additional converter, significantly increasing cost and space, while providing the ability to match 500V and 750V charging piles, greatly facilitating user charging needs. The first converter 1 uses an interleaved parallel circuit to meet the requirements of high power and low ripple.

[0192] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0193] like Figure 11 FIG. 1 is a schematic diagram of the hardware structure of an electronic device of the present invention, comprising:

[0194] at least one processor 11001; and,

[0195] A memory 11002 in communication with at least one of the processors 11001; wherein,

[0196] The memory 11002 stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one processor to execute the control method of the vehicle drive charging circuit as described above.

[0197] Figure 11 A processor 11001 is taken as an example.

[0198] The electronic device may further include: an input device 11003 and a display device 11004 .

[0199] The processor 11001, the memory 11002, the input device 11003 and the display device 11004 may be connected via a bus or other means, with the figure taking the bus connection as an example.

[0200] The memory 11002 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs, and modules, such as program instructions / modules corresponding to the vehicle driving charging circuit control method in the embodiment of the present application, for example, Figure 5The processor 11001 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 11002, that is, implementing the control method of the vehicle driving charging circuit in the above embodiment.

[0201] Memory 11002 may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function; the data storage area may store data generated based on the use of the vehicle drive charging circuit control method. Furthermore, memory 11002 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some embodiments, memory 11002 may optionally include memory remotely located relative to processor 11001. Such remote memory may be connected to the apparatus for executing the vehicle drive charging circuit control method via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0202] The input device 11003 can receive user clicks and generate signal input related to user settings and function control of the vehicle driving and charging circuit control method. The display device 11004 can include a display device such as a display screen.

[0203] The one or more modules are stored in the memory 11002 and, when executed by the one or more processors 11001 , execute the vehicle driving charging circuit control method in any of the above method embodiments.

[0204] This embodiment controls the first converter to operate in inverter mode, rectifier mode, interleaved parallel boost mode, and interleaved parallel buck mode according to different vehicle operating conditions. This allows the matching of different battery pack voltage platforms without changing the EPT specifications while meeting the overall vehicle performance requirements, which is beneficial to the platformization of the EPT. Externally discharging users can use charging piles of different voltage platforms for charging, meaning that charging is not picky about the charging piles, while also increasing the current, maximizing the use of the output power of the charging piles and achieving the fastest energy replenishment speed.

[0205] An embodiment of the present invention provides a storage medium storing computer instructions. When a computer executes the computer instructions, the computer is used to execute all steps of the control method of the vehicle driving charging circuit as described above.

[0206] In the context of the present disclosure, a storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or apparatus. The storage medium may be a machine-readable signal medium or a machine-readable storage medium. Alternatively, the storage medium may be a non-transitory computer-readable storage medium, for example, a non-transitory computer-readable storage medium may be a ROM, a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device.

[0207] An embodiment of the present invention provides a computer program product, including a computer program / instruction, which implements the above-mentioned control method for a vehicle driving and charging circuit when executed by a processor.

[0208] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A vehicle driving and charging circuit, characterized in that: include: A first converter (1) connected to the battery (3) and the charging port (4) respectively, wherein the first converter (1) is controllable to be in an inverter mode, a rectifier mode, an interleaved parallel boost mode, or an interleaved parallel buck mode; The first converter (1) comprises: a first converter first branch connected to a first phase line (61) of a motor (6) and comprising a switch tube, a first converter second branch connected to a second phase line (62) of the motor (6) and comprising a switch tube, and a first converter third branch connected to a third phase line (63) of the motor (6) and comprising a switch tube, the first converter third branch being connectable and disconnectable to a charging port (4) via a charging switch (5), the first converter first branch being connected to the battery (3), the first converter first branch and the first converter second branch being connectable and disconnectable via a second switch (12), and the first converter second branch and the first converter third branch being connectable and disconnectable via a first switch (11).

2. The vehicle driving and charging circuit according to claim 1, characterized in that: The first branch of the first converter includes: a first switch tube (13) and a second switch tube (14); the second branch of the first converter includes: a third switch tube (15) and a fourth switch tube (16); the third branch of the first converter includes: a fifth switch tube (17) and a sixth switch tube (18); The first end of the first switch tube (13) is connected to the battery (3), the first end of the first switch tube (13) is connected to the first end of the third switch tube (15) through the second switch (12), the first end of the third switch tube (15) is connected to the first end of the fifth switch tube (17) through the first switch (11), the first end of the fifth switch tube (17) is connected to the positive electrode of the charging port (4) through the charging switch (5), the second end of the second switch tube (14), the second end of the fourth switch tube (16), and the sixth switch tube (18) are connected to the positive electrode of the charging port (4) through the charging switch (5). The second end of each of the first switch tube (13) and the first end of the second switch tube (14) are respectively connected to the negative electrode of the battery (3) and the negative electrode of the charging port (4); the second end of the first switch tube (13) and the first end of the second switch tube (14) are respectively connected to the first phase line (61) of the motor (6); the second end of the third switch tube (15) and the first end of the fourth switch tube (16) are respectively connected to the second phase line (62) of the motor (6); the second end of the fifth switch tube (17) and the first end of the sixth switch tube (18) are respectively connected to the third phase line (63) of the motor (6); or The first end of the first switch tube (13), the first end of the third switch tube (15), and the first end of the fifth switch tube (17) are respectively connected to the positive electrode of the battery (3); the first end of the fifth switch tube (17) is connected to the positive electrode of the charging port (4) through the charging switch (5); the second end of the second switch tube (14) is connected to the negative electrode of the battery (3); the second switch tube (14) is connected to the second end of the fourth switch tube (16) through the second switch (12); the second end of the fourth switch tube (16) is connected to the positive electrode of the sixth switch tube (11) through the first switch (11). The second end of the sixth switch tube (18) is connected to the negative electrode of the charging port (4), the second end of the first switch tube (13) and the first end of the second switch tube (14) are respectively connected to the first phase line (61) of the motor (6), the second end of the third switch tube (15) and the first end of the fourth switch tube (16) are respectively connected to the second phase line (62) of the motor (6), and the second end of the fifth switch tube (17) and the first end of the sixth switch tube (18) are respectively connected to the third phase line (63) of the motor (6).

3. The vehicle driving and charging circuit according to claim 1, characterized in that: The first branch of the first converter comprises: an eleventh switch tube (111), a twelfth switch tube (112), a thirteenth switch tube (113), a fourteenth switch tube (114), a first capacitor (101), and a second capacitor (102); the second branch of the first converter comprises: a fifteenth switch tube (115), a sixteenth switch tube (116), a seventeenth switch tube (117), an eighteenth switch tube (118), a third capacitor (103), and a fourth capacitor (104); and the third branch of the first converter comprises: a nineteenth switch tube (119), a twentieth switch tube (120), a twenty-first switch tube (121), a twenty-second switch tube (122), a fifth capacitor (105), and a sixth capacitor (106); The first end of the eleventh switch tube (111) is connected to the battery (3), the first end of the eleventh switch tube (111) is connected to the first end of the fifteenth switch tube (115) through the second switch (12), the first end of the fifteenth switch tube (115) is connected to the first end of the nineteenth switch tube (119) through the first switch (11), the first end of the nineteenth switch tube (119) is connected to the positive electrode of the charging port (4) through the charging switch (5), the second end of the twelfth switch tube (112), the second end of the sixteenth switch tube (116), the The second end of the twentieth switch tube (120) is respectively connected to the negative electrode of the battery (3) and the negative electrode of the charging port (4); the second end of the eleventh switch tube (111), the first end of the twelfth switch tube (112), and the first end of the thirteenth switch tube (113) are respectively connected to the first phase line (61) of the motor (6); the second end of the thirteenth switch tube (113) is connected to the second end of the fourteenth switch tube (114); the first end of the fourteenth switch tube (114) is respectively connected to the positive electrode of the battery (3) via the first capacitor (101), and the first end of the fourteenth switch tube (114) is respectively connected to the positive electrode of the battery (3). The first end of the fifteenth switch tube (115), the first end of the sixteenth switch tube (116), and the first end of the seventeenth switch tube (117) are respectively connected to the second phase line (62) of the motor (6); the second end of the seventeenth switch tube (117) is connected to the second end of the eighteenth switch tube (118); the first end of the eighteenth switch tube (118) is respectively connected to the positive electrode of the battery (3) through the third capacitor (103), and to the positive electrode of the battery (3) through the fourth capacitor (104). The negative electrode of the battery (3) is connected, the second end of the nineteenth switch tube (119), the first end of the twentieth switch tube (120), and the first end of the twenty-first switch tube (121) are respectively connected to the third phase line (63) of the motor (6), the second end of the twenty-first switch tube (121) is connected to the second end of the twenty-second switch tube (122), and the first end of the twenty-second switch tube (122) is respectively connected to the positive electrode of the battery (3) through the fifth capacitor (105) and connected to the negative electrode of the battery (3) through the sixth capacitor (106); or The first end of the eleventh switch tube (111) is connected to the battery (3), the first end of the eleventh switch tube (111) is connected to the first end of the fifteenth switch tube (115) through the second switch (12), the first end of the fifteenth switch tube (115) is connected to the first end of the nineteenth switch tube (119) through the first switch (11), the first end of the nineteenth switch tube (119) is connected to the positive electrode of the charging port (4) through the charging switch (5), the second end of the twelfth switch tube (112), the second end of the sixteenth switch tube (116), the The second end of the twentieth switch tube (120) is respectively connected to the negative electrode of the battery (3) and the negative electrode of the charging port (4); the second end of the eleventh switch tube (111), the first end of the twelfth switch tube (112), and the second end of the thirteenth switch tube (113) are respectively connected to the first phase line (61) of the motor (6); the first end of the thirteenth switch tube (113) is connected to the first end of the fourteenth switch tube (114); the second end of the fourteenth switch tube (114) is respectively connected to the positive electrode of the battery (3) via the first capacitor (101), and the first end of the thirteenth switch tube (113) is connected to the first end of the fourteenth switch tube (114). The first end of the fifteenth switch tube (115), the first end of the sixteenth switch tube (116), and the second end of the seventeenth switch tube (117) are respectively connected to the second phase line (62) of the motor (6); the first end of the seventeenth switch tube (117) is connected to the first end of the eighteenth switch tube (118); the second end of the eighteenth switch tube (118) is respectively connected to the positive electrode of the battery (3) through the third capacitor (103), and to the positive electrode of the battery (3) through the fourth capacitor (104). The negative electrode of the battery (3) is connected, the second end of the nineteenth switch tube (119), the first end of the twentieth switch tube (120), and the second end of the twenty-first switch tube (121) are respectively connected to the third phase line (63) of the motor (6), the first end of the twenty-first switch tube (121) is connected to the first end of the twenty-second switch tube (122), and the second end of the twenty-second switch tube (122) is respectively connected to the positive electrode of the battery (3) through the fifth capacitor (105) and connected to the negative electrode of the battery (3) through the sixth capacitor (106); or The first end of the eleventh switch tube (111), the first end of the fifteenth switch tube (115), and the first end of the nineteenth switch tube (119) are respectively connected to the positive electrode of the battery (3); the first end of the nineteenth switch tube (119) is connected to the positive electrode of the charging port (4) through the charging switch (5); the second end of the twelfth switch tube (112) is connected to the negative electrode of the battery (3); the second end of the twelfth switch tube (112) is connected to the second end of the sixteenth switch tube (116) through the second switch (12); the second end of the sixteenth switch tube (116) is connected to the positive electrode of the charging port (4) through the charging switch (5); The first switch (11) is connected to the second end of the twentieth switch tube (120), the second end of the twentieth switch tube (120) is connected to the negative electrode of the charging port (4), the second end of the eleventh switch tube (111), the first end of the twelfth switch tube (112), and the first end of the thirteenth switch tube (113) are respectively connected to the first phase line (61) of the motor (6), the second end of the thirteenth switch tube (113) is connected to the second end of the fourteenth switch tube (114), and the first end of the fourteenth switch tube (114) is respectively connected to the first capacitor (101). The positive electrode of the battery (3) is connected, and the negative electrode of the battery (3) is connected through the second capacitor (102). The second end of the fifteenth switch tube (115), the first end of the sixteenth switch tube (116), and the first end of the seventeenth switch tube (117) are respectively connected to the second phase line (62) of the motor (6). The second end of the seventeenth switch tube (117) is connected to the second end of the eighteenth switch tube (118). The first end of the eighteenth switch tube (118) is respectively connected to the positive electrode of the battery (3) through the third capacitor (103), and the first end of the fourth capacitor ( 104) is connected to the negative electrode of the battery (3), the second end of the nineteenth switch tube (119), the first end of the twentieth switch tube (120), and the first end of the twenty-first switch tube (121) are respectively connected to the third phase line (63) of the motor (6), the second end of the twenty-first switch tube (121) is connected to the second end of the twenty-second switch tube (122), and the first end of the twenty-second switch tube (122) is respectively connected to the positive electrode of the battery (3) through the fifth capacitor (105) and connected to the negative electrode of the battery (3) through the sixth capacitor (106); The first end of the eleventh switch tube (111), the first end of the fifteenth switch tube (115), and the first end of the nineteenth switch tube (119) are respectively connected to the positive electrode of the battery (3); the first end of the nineteenth switch tube (119) is connected to the positive electrode of the charging port (4) through the charging switch (5); the second end of the twelfth switch tube (112) is connected to the negative electrode of the battery (3); the second end of the twelfth switch tube (112) is connected to the second end of the sixteenth switch tube (116) through the second switch (12); the second end of the sixteenth switch tube (116) is connected to the positive electrode of the charging port (4) through the charging switch (5); The first switch (11) is connected to the second end of the twentieth switch tube (120), the second end of the twentieth switch tube (120) is connected to the negative electrode of the charging port (4), the second end of the eleventh switch tube (111), the first end of the twelfth switch tube (112), and the second end of the thirteenth switch tube (113) are respectively connected to the first phase line (61) of the motor (6), the first end of the thirteenth switch tube (113) is connected to the first end of the fourteenth switch tube (114), and the second end of the fourteenth switch tube (114) is respectively connected to the first phase line (61) of the motor (6) through the first capacitor (101). The positive electrode of the battery (3) is connected, and the negative electrode of the battery (3) is connected through the second capacitor (102). The second end of the fifteenth switch tube (115), the first end of the sixteenth switch tube (116), and the second end of the seventeenth switch tube (117) are respectively connected to the second phase line (62) of the motor (6). The first end of the seventeenth switch tube (117) is connected to the first end of the eighteenth switch tube (118). The second end of the eighteenth switch tube (118) is respectively connected to the positive electrode of the battery (3) through the third capacitor (103), and the negative electrode of the battery (3) through the fourth capacitor ( 104) is connected to the negative electrode of the battery (3), the second end of the nineteenth switch tube (119), the first end of the twentieth switch tube (120), and the second end of the twenty-first switch tube (121) are respectively connected to the third phase line (63) of the motor (6), the first end of the twenty-first switch tube (121) is connected to the first end of the twenty-second switch tube (122), and the second end of the twenty-second switch tube (122) is respectively connected to the positive electrode of the battery (3) through the fifth capacitor (105) and connected to the negative electrode of the battery (3) through the sixth capacitor (106).

4. The vehicle driving and charging circuit according to claim 1, characterized in that: Also includes: A second converter (2) connected to a battery (3) and the first converter (1), wherein the second converter (2) is controllable to be in an interleaved parallel boost mode or an interleaved parallel buck mode.

5. The vehicle driving and charging circuit according to claim 4, characterized in that: The second converter (2) comprises: a first inductor (21), a second inductor (22), a seventh switching tube (23), an eighth switching tube (24), a ninth switching tube (25), a tenth switching tube (26) and a third switch (27); the first end of the seventh switching tube (23) and the first end of the eighth switching tube (24) are connected to the first end of the first inductor (21) and the first end of the second inductor (22) through the third switch (27); the first end of the first inductor (21) and the first end of the second inductor (22) are respectively connected to the positive electrode of the battery (3); the second end of the ninth switching tube (25) and the second end of the tenth switching tube (26) are connected to the negative electrode of the battery (3); the second end of the seventh switching tube (23) and the first end of the ninth switching tube (25) are respectively connected to the second end of the first inductor (21); the second end of the eighth switching tube (24) and the first end of the tenth switching tube (26) are respectively connected to the second end of the second inductor (22).

6. A method for controlling a vehicle driving and charging circuit according to any one of claims 1 to 5, characterized in that: include: Obtain vehicle operating conditions; According to the vehicle operating conditions, the first converter (1) is controlled to be in inverter mode, rectification mode, staggered parallel boost mode, staggered parallel buck mode or not working.

7. The control method of the vehicle driving charging circuit according to claim 6, characterized in that: The controlling of the first converter (1) to operate in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not to operate according to the vehicle operating condition comprises: If the vehicle operating condition is a driving condition or a vehicle kinetic energy recovery condition, the charging switch (5) is controlled to be disconnected, and the first switch (11) and the second switch (12) are controlled to be closed. In the driving condition, the first converter (1) is in an inverter mode, and in the vehicle kinetic energy recovery condition, the first converter (1) is in a rectifier mode. When the voltage of the battery (3) is less than or equal to a first voltage threshold, if the vehicle operating condition is a charging condition and the output current of the charging pile is less than the battery current demand, the first switch (11) is controlled to be closed, the second switch (12) is controlled to be disconnected, the charging switch (5) is controlled to be closed, and the first converter (1) is in an interleaved parallel buck mode; or When the voltage of the battery (3) is less than or equal to a first voltage threshold, if the vehicle operating condition is a charging condition and the output current of the charging pile meets the battery current requirement, the first switch (11) and the second switch (12) are controlled to be closed, the charging switch (5) is controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery (3), and the output current of the charging pile is less than the battery current demand, the first switch (11) is controlled to be closed, the second switch (12) is disconnected, the charging switch (5) is controlled to be closed, and the first converter (1) is in an interleaved parallel buck mode; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery (3), and the output current of the charging pile meets the battery current requirement, the first switch (11) and the second switch (12) are controlled to be closed, the charging switch (5) is controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery (3), the first switch (11) is controlled to be disconnected, the second switch (12) is controlled to be closed, the charging switch (5) is controlled to be closed, and the first converter (1) is in an interleaved parallel boost mode; or When the voltage of the battery (3) is greater than a second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is greater than the voltage of the battery (3), the first switch (11) and the second switch (12) are controlled to be closed, the charging switch (5) is controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is greater than a second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery (3), the first switch (11) is controlled to be disconnected, the second switch (12) is controlled to be closed, the charging switch (5) is controlled to be closed, and the first converter (1) is in an interleaved parallel boost mode.

8. The control method of the vehicle driving charging circuit according to claim 6, characterized in that: The vehicle driving charging circuit further comprises: a second converter (2) connected to the battery (3) and the first converter (1), the second converter (2) being controllable to be in an interleaved parallel boost mode or an interleaved parallel buck mode, and the first converter (1) being controlled to be in an inverter mode, a rectifier mode, an interleaved parallel boost mode, or an interleaved parallel buck mode according to the vehicle operating condition, comprising: According to the vehicle operating conditions, the second converter (2) is controlled to be in an interleaved parallel boost mode, an interleaved parallel buck mode or not working, and the first converter (1) is controlled to be in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode or not working.

9. The control method of the vehicle driving charging circuit according to claim 8, characterized in that: According to the vehicle operating condition, the second converter (2) is controlled to be in an interleaved parallel boost mode, an interleaved parallel buck mode, or not working, and the first converter (1) is controlled to be in an inverter mode, a rectifier mode, an interleaved parallel boost mode, an interleaved parallel buck mode, or not working, comprising: When the voltage of the battery (3) is less than or equal to a second voltage threshold, if the vehicle is in a driving state, the charging switch (5) is controlled to be disconnected, the third switch (27) is controlled to be disconnected, the second converter (2) is in an interleaved parallel boost mode, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is in an inverter mode; or When the voltage of the battery (3) is greater than a second voltage threshold, if the vehicle operating condition is a driving condition, the charging switch (5) is controlled to be disconnected, the first switch (11) and the second switch (12) are controlled to be closed, the first converter (1) is in inverter mode, and it is determined whether the voltage of the battery (3) meets the bus voltage requirement. If so, the third switch (27) is controlled to be closed, and the second converter (2) is not operated. Otherwise, the third switch (27) is controlled to be disconnected, and the second converter (2) is in staggered parallel boost mode; or When the voltage of the battery (3) is less than or equal to a second voltage threshold, if the vehicle operating condition is a vehicle kinetic energy recovery condition, the third switch (27) is controlled to be disconnected, the second converter (2) is in an interleaved parallel buck mode, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is in a rectification mode; or When the voltage of the battery (3) is greater than a second voltage threshold, if the vehicle operating condition is a vehicle kinetic energy recovery condition, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is in a rectification mode; or When the voltage of the battery (3) is less than or equal to a first voltage threshold, if the vehicle operating condition is a charging condition and the output current of the charging pile is less than the battery current demand, the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be disconnected, the second converter (2) is in an interleaved parallel buck mode, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is less than or equal to a first voltage threshold, if the vehicle operating condition is a charging condition and the output current of the charging pile is less than the battery current demand, the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) is controlled to be closed, the second switch (12) is disconnected, and the first converter (1) is in an interleaved parallel buck mode; or When the voltage of the battery (3) is less than or equal to a first voltage threshold, if the vehicle operating condition is a charging condition and the output current of the charging pile meets the battery current requirement, the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery (3), and the output current of the charging pile is less than the battery current demand, the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be disconnected, the second converter (2) is in an interleaved parallel buck mode, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery (3), and the output current of the charging pile is less than the battery current demand, the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) is controlled to be closed, the second switch (12) is disconnected, and the first converter (1) is in an interleaved parallel buck mode; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition, and the output voltage of the charging pile is greater than the voltage of the battery (3), and the output current of the charging pile meets the battery current requirement, the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) and the second switch (12) are controlled to be closed, and the first converter (1) is not operated; or When the voltage of the battery (3) is less than or equal to the second voltage threshold and greater than the first voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery (3), the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) is controlled to be disconnected, the second switch (12) is controlled to be closed, and the first converter (1) is in an interleaved parallel boost mode; When the voltage of the battery (3) is greater than a second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is greater than the voltage of the battery (3), the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is controlled to be inoperative, the first switch (11) and the second switch (12) are controlled to be closed, the first converter (1) is controlled to be inoperative, and the charging switch (5) is controlled to be closed; or When the voltage of the battery (3) is greater than a second voltage threshold, if the vehicle operating condition is a charging condition and the output voltage of the charging pile is less than or equal to the voltage of the battery (3), the charging switch (5) is controlled to be closed, the third switch (27) is controlled to be closed, the second converter (2) is not operated, the first switch (11) is controlled to be disconnected, the second switch (12) is controlled to be closed, and the first converter (1) is in an interleaved parallel boost mode.

10. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one processor to execute the control method of the vehicle driving charging circuit according to any one of claims 6 to 9.

11. A storage medium, characterized in that: The storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute all steps of the control method of the vehicle driving charging circuit according to any one of claims 6 to 9.

12. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the control method of the vehicle driving charging circuit according to any one of claims 6 to 9 is implemented.

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