Vehicle electric drive controller and vehicle

Abstract

A high-voltage interface assembly and a low-voltage interface are arranged on a box body, and a micro-control unit, a vehicle-mounted charging power unit, a direct current-direct current converter power unit, a main drive motor, a first inversion power unit and a second inversion function unit are arranged in the box body. The vehicle-mounted charging power unit, the direct current-direct current converter power unit, the first inversion power unit and the second inversion function unit are respectively controlled through the micro-control unit, so that an electric drive controller, a power supply system and a compressor controller are integrated together, and the electric drive, the power supply system and a compressor can be controlled by using one MCU (Microprogrammed Control Unit); independent control of multiple controllers is not needed, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and in particular to a vehicle electric drive controller and a vehicle. Background Art

[0002] Electric vehicles are powered by an onboard electrical system, with motors driving the wheels. These vehicles include a power system, a main drive motor, and an electric compressor. To achieve these functions, these systems, main drive motors, and electric compressors are each controlled by multiple independent controllers, resulting in high costs. Utility Model Content

[0003] The purpose of the utility model is to overcome the disadvantage of the prior art that electric vehicles use multiple independent controllers to independently control the power supply system, main drive motor and electric compressor, which is high in cost, and to provide a vehicle electric drive controller and a vehicle.

[0004] The technical solution of the utility model provides a vehicle electric drive controller, including a box body, on which a high-voltage interface component and a low-voltage interface electrically connected to a low-voltage system are provided. The box body is provided with a micro-control unit, an on-board charging power unit, a DC-DC converter power unit, a main drive motor, a first inverter power unit, and a second inverter function unit electrically connected to a compressor motor.

[0005] A first end of the on-board charging power unit is electrically connected to the micro-control unit, and a second end of the on-board charging power unit is electrically connected to the high-voltage interface assembly;

[0006] One end of the DC-DC converter power unit is electrically connected to the high-voltage interface component, and the other end of the DC-DC converter power unit is electrically connected to the low-voltage interface;

[0007] A first end of the first inverter power unit is electrically connected to the micro-control unit, a second end of the first inverter power unit is electrically connected to the high-voltage interface component, and a third end of the first inverter power unit is electrically connected to the main drive motor;

[0008] One end of the second inverter power unit is electrically connected to the micro-control unit, and the other end of the second inverter power unit is electrically connected to the high-voltage interface component.

[0009] In one of the optional technical solutions, the high-voltage interface assembly includes a first high-voltage interface electrically connected to an external power source and a second high-voltage interface electrically connected to a high-voltage battery.

[0010] The second end of the on-board charging power unit is electrically connected to the first high-voltage interface and the second high-voltage interface respectively, one end of the DC-DC converter power unit is electrically connected to the second high-voltage interface, and the second end of the first inverter power unit is electrically connected to the second high-voltage interface.

[0011] In one of the optional technical solutions, the high-voltage interface assembly includes a third high-voltage interface electrically connected to the compressor motor, and the other end of the second inverter power unit is electrically connected to the third high-voltage interface.

[0012] In one of the optional technical solutions, the DC-DC converter power unit includes a bidirectional inverter, a transformer and a rectifier, one end of the bidirectional inverter is electrically connected to the second high-voltage interface, the other end of the bidirectional inverter is electrically connected to one end of the transformer, the other end of the transformer is electrically connected to one end of the rectifier, and the other end of the rectifier is electrically connected to the low-voltage interface.

[0013] In one of the optional technical solutions, an isolation drive component is further provided in the box, and the micro-control unit is electrically connected to the on-board charging power unit, the first inverter power unit and the second inverter power unit respectively through the isolation drive component.

[0014] In one of the optional technical solutions, the isolation drive component includes a charging isolation driver, a converter isolation driver, a first inverter isolation driver, and a second inverter isolation driver. The micro-control unit is electrically connected to the on-board charging power unit through the charging isolation driver, the micro-control unit is electrically connected to the DC-DC converter power unit through the converter isolation driver, the micro-control unit is electrically connected to the first inverter power unit through the first inverter isolation driver, and the micro-control unit is electrically connected to the second inverter power unit through the second inverter isolation driver.

[0015] In one of the optional technical solutions, an isolated communication interface is further provided in the box, the on-board charging power unit includes a digital signal processor, and the micro-control unit is communicatively connected to the digital signal processor via the isolated communication interface.

[0016] In one of the optional technical solutions, the first inverter power unit and the second inverter power unit are both three-phase inverters.

[0017] In one of the optional technical solutions, the low-voltage interface is a 12V low-voltage interface.

[0018] The technical solution of the present utility model further provides a vehicle, comprising the vehicle electric drive controller as described above.

[0019] After adopting the above technical solution, the following beneficial effects are achieved: by arranging a high-voltage interface component and a low-voltage interface on the box, and arranging the micro-control unit, the on-board charging power unit, the DC-DC converter power unit, the main drive motor, the first inverter power unit and the second inverter function unit in the box, the on-board charging power unit, the DC-DC converter power unit, the first inverter power unit and the second inverter function unit are respectively controlled by the micro-control unit, so that the electric drive controller, the power supply system and the compressor controller are integrated together. One MCU can be used to control the electric drive, the power supply system and the compressor, without the need for separate control by multiple controllers, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0021] Figure 1 This is a schematic structural diagram of a vehicle electric drive controller provided by one embodiment of the present utility model.

[0022] Reference numerals:

[0023] 10-cabinet; 101-low-voltage interface; 102-micro-control unit; 103-on-board charging power unit; 104-DC-DC converter power unit; 1041-bidirectional inverter; 1042-transformer; 1043-rectifier; 105-main drive motor; 106-first inverter power unit; 107-second inverter power unit; 108-first high-voltage interface; 109-second high-voltage interface; 110-third high-voltage interface; 111-charging isolation driver; 112-converter isolation driver; 113-first inverter isolation driver; 114-second inverter isolation driver; 115-isolated communication interface; 20-compressor motor; 30-high-voltage battery. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0025] It is easy to understand that according to the technical solution of the present invention, a variety of structural methods and implementation methods can be replaced by those skilled in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the utility model.

[0026] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0027] like Figure 1 As shown, Figure 1 An embodiment of the present invention provides a vehicle electric drive controller, including a housing 10, which is provided with a high-voltage interface assembly and a low-voltage interface 101 electrically connected to a low-voltage system. The housing 10 is provided with a micro-control unit 102, an on-board charging power unit 103, a DC-DC converter power unit 104, a main drive motor 105, a first inverter power unit 106, and a second inverter function unit 107 electrically connected to a compressor motor 20.

[0028] A first end of the on-board charging power unit 103 is electrically connected to the micro-control unit 102 , and a second end of the on-board charging power unit 103 is electrically connected to the high-voltage interface assembly;

[0029] One end of the DC-DC converter power unit 104 is electrically connected to the high voltage interface assembly, and the other end of the DC-DC converter power unit 104 is electrically connected to the low voltage interface 101;

[0030] A first end of the first inverter power unit 106 is electrically connected to the micro-control unit 102 , a second end of the first inverter power unit 106 is electrically connected to the high-voltage interface component, and a third end of the first inverter power unit 106 is electrically connected to the main drive motor 105 ;

[0031] One end of the second inverter power unit 107 is electrically connected to the micro-control unit 102 , and the other end of the second inverter power unit 107 is electrically connected to the high-voltage interface component.

[0032] The vehicle electric drive controller provided in this embodiment is used to control the vehicle's power system, main drive motor, and compressor motor, and mainly includes a box 10, in which a microcontroller unit (MCU) 102, an on-board charging power unit 103, a DC-to-DC (DCDC) converter power unit 104, a main drive motor 105, a first inverter power unit 106, and a second inverter function unit 107 are provided.

[0033] The box body 10 is provided with a high-voltage interface assembly and a low-voltage interface 101 . The high-voltage interface assembly is used to electrically connect to an external high-voltage component, and the low-voltage interface 101 is used to electrically connect to a low-voltage system in the vehicle.

[0034] The micro-control unit 102 is electrically connected to the on-board charging power 103, the DCDC converter power unit 104, the first inverter power unit 106 and the second inverter power unit 107 respectively. The micro-control unit 102 controls the output of 6 groups of synchronous pulse width modulation (PWM) signals, one group of 6 channels for the main drive motor 105, two groups of 6 channels for the DCDC converter power unit 104, two groups of 8 channels for the on-board charging power 103, and one group of 6 channels for the compressor motor 20. The working principle of the micro-control unit 102 can adopt existing technology and will not be elaborated here.

[0035] The on-board charging power unit 103 is used to convert AC power into DC power to charge the high-voltage battery 30. Specifically, the on-board charging power unit 103 is an on-board charger (OBC), and its working principle is the same as that of the OBC, which will not be described in detail here.

[0036] The DCDC converter power unit 104 is used to convert high voltage into low voltage to power the vehicle's low voltage system. Specifically, the DCDC converter power unit 104 is a DCDC converter, and its working principle is the same as that of the DCDC converter, which will not be described in detail here.

[0037] The first inverter power unit 106 and the second inverter power unit 107 are used to convert DC power into AC power to power the main drive motor 105 and the compressor motor 20, respectively. Specifically, the first inverter power unit 106 and the second inverter power unit 107 are inverters, and their operating principles are the same as those of inverters, which will not be described in detail here.

[0038] In this embodiment, a high-voltage interface component and a low-voltage interface are arranged on the box, and a micro-control unit, an on-board charging power unit, a DC-DC converter power unit, a main drive motor, a first inverter power unit and a second inverter function unit are arranged in the box. The on-board charging power unit, the DC-DC converter power unit, the first inverter power unit and the second inverter function unit are respectively controlled by the micro-control unit, thereby integrating the electric drive controller, the power supply system and the compressor controller. One MCU can be used to control the electric drive, the power supply system and the compressor, without the need for separate control by multiple controllers, thereby reducing costs.

[0039] In one embodiment, the high-voltage interface assembly includes a first high-voltage interface 108 electrically connected to an external power source, and a second high-voltage interface 109 electrically connected to a high-voltage battery 30.

[0040] The second end of the on-board charging power unit 103 is electrically connected to the first high-voltage interface 108 and the second high-voltage interface 109 respectively, one end of the DC-DC converter power unit 104 is electrically connected to the second high-voltage interface 109, and the second end of the first inverter power unit 106 is electrically connected to the second high-voltage interface 112.

[0041] The first high-voltage interface 108 is a 220V high-voltage interface, which is used to electrically connect an external AC power source to the on-board charging power unit 103 .

[0042] The second high-voltage interface 109 is used to electrically connect the vehicle's high-voltage battery (such as 400V or 800V) with the on-board charging power unit 103, the DCDC converter power unit 104 and the first inverter power unit 106. The on-board charging power unit 103, the DCDC converter power unit 104 and the first inverter power unit 106 are connected in parallel to the second high-voltage interface 109.

[0043] In one embodiment, to facilitate control of the compressor motor 20 , the high-voltage interface assembly includes a third high-voltage interface 110 electrically connected to the compressor motor 20 , and the other end of the second inverter power unit 108 is electrically connected to the third high-voltage interface 110 .

[0044] In one embodiment, the DC-DC converter power unit 104 includes a bidirectional inverter 1041, a transformer 1042 and a rectifier 1043, one end of the bidirectional inverter 1041 is electrically connected to the second high-voltage interface 109, the other end of the bidirectional inverter 1041 is electrically connected to one end of the transformer 1042, the other end of the transformer 1042 is electrically connected to one end of the rectifier 1043, and the other end of the rectifier 1043 is electrically connected to the low-voltage interface 101.

[0045] The bidirectional inverter 1041 is used to convert AC power into DC power, the transformer 1042 is used to convert high-voltage DC power into low-voltage DC power, and the rectifier 1043 is used to convert AC power after passing through the transformer 1042 into DC power, thereby ensuring the power safety of the low-voltage system. The DCDC converter function is realized through the bidirectional inverter 1041, transformer 1042 and rectifier 1043.

[0046] In one embodiment, an isolation drive component is further provided in the box 10, and the micro control unit 102 is electrically connected to the on-board charging power unit 103, the first inverter power unit 106 and the second inverter power unit 108 respectively through the isolation drive component.

[0047] The micro-control unit 102 is usually on the low-voltage side, while the on-board charging power unit 103, the first inverter power unit 106 and the second inverter power unit 108 are usually on the high-voltage side. In order to avoid signal interference and electrical failures, an isolation drive component is provided in the box 10 to isolate the micro-control unit 102 from the on-board charging power unit 103, the first inverter power unit 106 and the second inverter power unit 108, thereby improving system stability and safety.

[0048] In one embodiment, the isolation drive component includes a charging isolation driver 111, a converter isolation driver 112, a first inverter isolation driver 113, and a second inverter isolation driver 114. The micro-control unit 102 is electrically connected to the on-board charging power unit 103 through the charging isolation driver 111, the micro-control unit 102 is electrically connected to the DC-DC converter power unit 104 through the converter isolation driver 112, the micro-control unit 102 is electrically connected to the first inverter power unit 106 through the first inverter isolation driver 113, and the micro-control unit 102 is electrically connected to the second inverter power unit 108 through the second inverter isolation driver 114.

[0049] The charging isolation driver 111 is used to isolate the micro-control unit 102 from the on-board charging power unit 103, the converter isolation driver 112 is used to isolate the micro-control unit 102 from the DCDC converter power unit 104, the first inverter isolation driver 113 is used to isolate the micro-control unit 102 from the first inverter power unit 106, and the second inverter isolation driver 114 is used to isolate the micro-control unit 102 from the second inverter power unit 107, further improving stability and safety.

[0050] In one embodiment, an isolated communication interface 115 is further provided in the box 10 , the on-board charging power unit 103 includes a digital signal processor 1031 , and the micro-control unit 102 is communicatively connected to the digital signal processor 1031 via the isolated communication interface 115 .

[0051] The isolated communication interface 115 is used for communication between the micro control unit 102 and the DSP 1031. The isolated communication interface 115 can adopt RS-485, CAN communication interface, etc. to improve the stability and reliability of the communication system while protecting equipment and personal safety.

[0052] In one embodiment, to improve stability, the first inverter power unit 106 and the second inverter power unit 108 are both three-phase inverters.

[0053] In one embodiment, in order to improve compatibility, the low voltage interface 101 is a 12V low voltage interface.

[0054] The technical solution of the present utility model further provides a vehicle, comprising the vehicle electric drive controller as described above.

[0055] In this embodiment, the electric drive controller, power supply system and compressor controller are integrated together through the vehicle electric drive controller. The electric drive, power supply system and compressor can be controlled by one MCU, eliminating the need for multiple controllers to control them separately, thereby reducing costs.

[0056] The above description is only the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other variations can be made, which should also be considered as the scope of protection of the present invention.

Claims

1. A vehicle electric drive controller, characterized in that: The invention comprises a box body, on which a high-voltage interface component and a low-voltage interface electrically connected to the low-voltage system are provided. The box body is provided with a micro-control unit, an on-board charging power unit, a DC-DC converter power unit, a main drive motor, a first inverter power unit, and a second inverter power unit electrically connected to the compressor motor. A first end of the on-board charging power unit is electrically connected to the micro-control unit, and a second end of the on-board charging power unit is electrically connected to the high-voltage interface assembly; One end of the DC-DC converter power unit is electrically connected to the high-voltage interface component, and the other end of the DC-DC converter power unit is electrically connected to the low-voltage interface; A first end of the first inverter power unit is electrically connected to the micro-control unit, a second end of the first inverter power unit is electrically connected to the high-voltage interface component, and a third end of the first inverter power unit is electrically connected to the main drive motor; One end of the second inverter power unit is electrically connected to the micro-control unit, and the other end of the second inverter power unit is electrically connected to the high-voltage interface component.

2. The vehicle electric drive controller according to claim 1, wherein: The high-voltage interface assembly includes a first high-voltage interface electrically connected to an external power source and a second high-voltage interface electrically connected to a high-voltage battery. The second end of the on-board charging power unit is electrically connected to the first high-voltage interface and the second high-voltage interface respectively, one end of the DC-DC converter power unit is electrically connected to the second high-voltage interface, and the second end of the first inverter power unit is electrically connected to the second high-voltage interface.

3. The vehicle electric drive controller according to claim 2, wherein: The high-voltage interface assembly includes a third high-voltage interface electrically connected to the compressor motor, and the other end of the second inverter power unit is electrically connected to the third high-voltage interface.

4. The vehicle electric drive controller according to claim 2, wherein: The DC-DC converter power unit includes a bidirectional inverter, a transformer and a rectifier, one end of the bidirectional inverter is electrically connected to the second high-voltage interface, the other end of the bidirectional inverter is electrically connected to one end of the transformer, the other end of the transformer is electrically connected to one end of the rectifier, and the other end of the rectifier is electrically connected to the low-voltage interface.

5. The vehicle electric drive controller according to any one of claims 1 to 4, characterized in that: An isolation drive component is also provided in the box, and the micro-control unit is electrically connected to the on-board charging power unit, the first inverter power unit and the second inverter power unit respectively through the isolation drive component.

6. The vehicle electric drive controller according to claim 5, characterized in that: The isolation drive component includes a charging isolation driver, a converter isolation driver, a first inverter isolation driver, and a second inverter isolation driver. The micro-control unit is electrically connected to the on-board charging power unit through the charging isolation driver, the micro-control unit is electrically connected to the DC-DC converter power unit through the converter isolation driver, the micro-control unit is electrically connected to the first inverter power unit through the first inverter isolation driver, and the micro-control unit is electrically connected to the second inverter power unit through the second inverter isolation driver.

7. The vehicle electric drive controller according to claim 1, wherein: An isolated communication interface is also provided in the box body. The on-board charging power unit includes a digital signal processor. The micro-control unit is communicatively connected to the digital signal processor via the isolated communication interface.

8. The vehicle electric drive controller according to claim 1, wherein: The first inverter power unit and the second inverter power unit are both three-phase inverters.

9. The vehicle electric drive controller according to claim 1, wherein: The low voltage interface is a 12V low voltage interface.

10. A vehicle, characterized in that: It comprises the vehicle electric drive controller as described in any one of claims 1-9.

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