An intelligent interconnection and mutual control system for electric vehicle charging bows

Abstract

The present invention discloses an intelligent interconnection and mutual control system for charging bows of electric vehicles, comprising a charging pile-end control system and a vehicle-end control system, wherein the charging pile-end control system comprises a charging pile control unit, a motor mechanical self-locking / limiting drive control unit, a pile-end wireless communication unit, a charging bow and a vehicle alignment control unit; the vehicle-end control system comprises a vehicle ECU control unit, an on-board control panel system, and a pantograph on-board control unit, and electrical signals are connected among the vehicle ECU control unit, the on-board control panel system and the pantograph on-board control unit; and the pantograph on-board control unit is also respectively connected with the vehicle-end wireless communication unit and the pantograph electrical signal; the present invention ensures fast charging of electric vehicles, improves the safety of charging operation and the reliability of system operation, reduces cumbersome manual plug-in and unplugging of charging guns, increases the accuracy of vehicle alignment and parking, and has good social and economic benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy electric vehicle charging, and in particular relates to an intelligent interconnection and mutual control system for electric vehicle charging bows. Background Art

[0002] At present, traditional charging piles require manual plugging and unplugging of charging guns for charging, which is cumbersome to operate, with low charging current and long charging time. In addition, for fast charging with high DC current, the charging cable is heavy and inconvenient to move, and safety is not guaranteed. Therefore, a charging technology using a pantograph has emerged on the market, but the interconnection, control and detection technology of the pantograph is still immature. During use, problems such as misalignment of the connecting pile and damage to the pantograph, insufficient pressure when charging and ignition of the pantograph, lack of approaching vehicle detection, difficulty for the driver to align, and inability of the charging pantograph to defrost by itself often occur. In order to alleviate this problem, save more manpower, bring more convenience to electric vehicle charging, and improve the stability and safety of the system, this solution proposes an intelligent interconnection and mutual control system for electric vehicle charging pantographs. The following problems can be solved by this technical solution:

[0003] 1. Use two-way ultrasonic ranging technology to detect the real-time position of the vehicle and the charging bow to solve the problem of misalignment between the vehicle and the charging pile.

[0004] 2. Use laser detection and ground parking light control technology to assist the driver in accurately positioning the vehicle.

[0005] 3. Use dual-channel wireless communication to achieve system control interconnection and independent charging communication.

[0006] 4. Use proximity detection and rebound spring to detect pressure to achieve constant pressure of charging bow.

[0007] 5. Use DC servo motor mechanical self-locking to achieve zero current locking of the charging pantograph and the pantograph.

[0008] 6. Using an intelligent interconnection and control system for electric vehicle charging bows can allow unmanned vehicles to complete automatic charging. Summary of the invention

[0009] The purpose of the present invention is to provide an intelligent interconnection and mutual control system for charging bows of electric vehicles to solve the problems of the background technology.

[0010] To achieve the above purpose, the specific technical solution of the intelligent interconnection and mutual control system of an electric vehicle charging bow of the present invention is as follows:

[0011] An electric vehicle charging bow intelligent interconnection and mutual control system, including a charging pile end control system and a vehicle end control system, wherein the charging pile end control system includes a charging pile control unit, a motor mechanical self-locking / limiting drive control unit, a pile end wireless communication unit, a charging bow and a vehicle alignment control unit;

[0012] The wireless communication unit at the charging pile end is connected to the charging pile control unit by electrical signals to interconnect with the vehicle end control system;

[0013] The motor mechanical self-locking / limiting driving control unit, the charging bow and the charging pile control unit are connected by electrical signals. After the charging bow receives the signal sent by the vehicle-side control system, the charging pile control unit drives the motor mechanical self-locking / limiting driving control unit to complete the bow lowering operation; and the charging pile control unit transmits the bow lowering information to the vehicle-side control system;

[0014] The vehicle alignment control unit is connected to the charging pile control unit by electrical signals, and the alignment between the vehicle and the charging pile is completed by cooperating with the vehicle-side control system;

[0015] The vehicle-side control system includes a vehicle ECU control unit, an on-board control panel system, and a pantograph on-board control unit. The vehicle ECU control unit, the on-board control panel system, and the pantograph on-board control unit are connected by electrical signals; and the pantograph on-board control unit is also connected to the vehicle-side wireless communication unit and the pantograph electrical signal respectively;

[0016] The vehicle-side wireless communication unit, the pantograph onboard control unit and the vehicle ECU control unit are connected by electrical signals. The vehicle-side wireless communication unit is used to interconnect signals with the charging pile-side wireless communication unit, and the vehicle ECU control unit is used to complete the alignment of the vehicle and the charging pile with the vehicle alignment control unit;

[0017] The pantograph, the pantograph on-board control unit, the on-board control panel system and the vehicle ECU control unit are connected by electrical signals. The on-board control panel system is used to select the operation mode, and the pantograph on-board control unit is used to detect the data connection between the pantograph and the charging pantograph. After the connection is completed, a charging request is initiated to the charging pile control unit to complete the charging.

[0018] Furthermore, the vehicle alignment control unit is a laser detection and ground parking space marker light control unit.

[0019] Furthermore, a charging bow controller module is electrically connected between the charging pile control unit and the motor mechanical self-locking / limit drive control unit. The charging bow controller module is used to control the motor mechanical self-locking / limit drive control unit to complete the retraction of the charging bow, and send a retraction signal to the charging pile control unit and the pantograph on-board control unit to end charging.

[0020] Furthermore, a rebound spring and a proximity detection unit are electrically connected between the motor mechanical self-locking / limit drive control unit and the charging bow. The rebound spring and the proximity detection unit are used to detect the pressure between the charging bow and the pantograph to keep the pressure of the charging bow constant.

[0021] Furthermore, the charging pile-end control system also includes a charging bow return detection unit, which is respectively connected to the charging bow controller module and the charging bow electrical signal. The charging bow return detection unit is used to detect whether the charging bow is returned to its position and send a data signal to the charging bow controller module.

[0022] Furthermore, the pile-end wireless communication unit includes pile-end WIFI and pile-end WIFI, the vehicle-end wireless communication unit includes vehicle-end WIFI and vehicle-end WIFI, and a BMS battery management system is also electrically connected between the vehicle ECU control unit and the vehicle-end wireless communication unit. The pile-end WIFI and vehicle-end WIFI are used to send charging signals to the BMS battery management system; the pile-end WIFI and vehicle-end WIFI are used to send charging data signals requesting charging to the charging pantograph and the pantograph, respectively.

[0023] Furthermore, the charging bow is provided with a charging bow connection detection unit and a charging bow temperature detection and heating unit, and the pantograph is provided with a pantograph connection detection unit and a pantograph temperature detection and heating unit, and the charging bow connection detection unit and the pantograph connection detection unit are used to detect the connection status between the charging bow and the pantograph;

[0024] The charging pantograph temperature detection and heating unit and the pantograph temperature detection and heating unit are used to detect and control the surface temperature of the charging pantograph and the pantograph respectively.

[0025] Furthermore, the charging bow controller module is also electrically connected to the pile-end ultrasonic ranging unit, and the pantograph vehicle-mounted control unit is electrically connected to the vehicle-end ultrasonic ranging unit. The pile-end ultrasonic ranging unit and the vehicle-end ultrasonic ranging unit are used to detect the vehicle and detect the real-time position of the charging bow.

[0026] Furthermore, the vehicle-mounted control screen system is also electrically connected to a video-assisted positioning unit, which is used to assist in the alignment of the vehicle and the charging pile.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention ensures rapid charging of electric vehicles, improves charging operation safety and system operation reliability, reduces cumbersome manual plug-in and pull-out charging gun operations, increases the accuracy of vehicle docking, and has good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the charging pile control system of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the vehicle-side control system of the present invention.

[0031] Explanation of the numbers in the figure: 1. Charging pile control unit; 2. Charging bow controller module; 3. Motor mechanical self-locking / limit drive control unit; 4. Rebound spring and proximity detection unit; 5. Pile-end wireless communication unit; 6. Charging bow; 7. Vehicle-end wireless communication unit; 8. Pantograph; 9. Laser detection and ground parking space marker light control unit; 10. Charging bow homing detection unit; 11. Pile-end ultrasonic ranging unit; 12. Vehicle-end ultrasonic ranging unit; 13. Video-assisted positioning unit; 14. Pantograph on-board control unit; 15. BMS battery management system; 16. On-board control screen system; 17. Vehicle ECU control unit; 51. Pile-end WIFI1; 52. Pile-end WIFI2; 61. Charging bow connection detection unit; 62. Charging bow temperature detection and heating unit; 71. Vehicle-end WIFI1; 72. Vehicle-end WIFI2; 81. Pantograph connection detection unit; 82. Pantograph temperature detection and heating unit. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, the present invention is understood in conjunction with the accompanying drawings.

[0033] like Figure 1 and 2 As shown, the present invention discloses an intelligent interconnection and mutual control system for electric vehicle charging bows, including a charging pile end control system and a vehicle end control system. When the driver drives the vehicle (unmanned) into a parking space with a charging bow, the vehicle can be aligned with the help of the vehicle ECU control unit 17 and the laser detection and ground parking light control unit 9. When the vehicle passes by, the system laser detection and ground parking light control unit 9 directly lights up the yellow parking space marker light according to the detected signal. When the vehicle is parked within the allowed range of the charging bow, the marker light turns green, otherwise the system will not allow charging.

[0034] The driver (the vehicle ECU issues charging instructions when the driver is not driving) selects and operates in the vehicle control screen system 16 according to the number of the charging bow. After the system enters the charging process, the vehicle is interlocked for protection, and a wireless connection is established with the pile-end wireless communication unit 5 through the vehicle-end wireless communication unit 7. After successful connection, a charging request is initiated to the vehicle-end WIFI2-72 receiving the charging bow 8. At the same time, the charging bow 6 obtains a signal through the pile-end WIFI2-52 of the pile-end wireless communication unit 5 and starts to control the motor mechanical self-locking / limit drive control unit 3 to lower the bow, and informs the pantograph vehicle-mounted control unit 14 of the information through the pile-end WIFI2-52. The pantograph vehicle-mounted control unit 14 feeds back the data detected by the vehicle-end ultrasonic ranging unit 12 to the charging bow 6. After the detection data at both ends match, the charging bow will continue to descend to the set pressure position of the rebound spring and the proximity detection unit 4, and when the charging bow connection detection unit 61 and the pantograph connection detection unit 81 detect that they are connected, a charging request is initiated to the charging pile control unit 1.

[0035] If the detection data at both ends do not match, or the charging bow does not reach the set pressure position, or the connection signal cannot be detected, the system will automatically retract the charging bow and terminate charging, and send a charging abnormality message to the pantograph on-board control unit 14. After receiving the charging request, the charging pile control unit 1 initiates a charging request to the BMS battery management system 15 through the pile-end WIFI-51 of the pile-end wireless communication unit 5 and the vehicle-end WIFI1-71 of the vehicle-end wireless communication unit 7. The system then begins to complete the charging process in accordance with the national standard BMS protocol. The charging bow temperature detection and heating unit 62 and the pantograph temperature detection and heating unit 82 are used to detect and control the surface temperature of the charging bow 6 and the pantograph 8, respectively.

[0036] When the electric vehicle is fully charged, the BMS fails, the charging system fails, the unmanned vehicle issues a stop command, or the on-board control screen system 16 is manually operated to stop charging, the system will first stop the charging pile control unit 1, and then allow the charging bow controller module 2 to control the motor mechanical self-locking / limit drive control unit 3 to retract the charging bow 6. Finally, the charging bow controller module 2 sends a retraction signal to the charging pile control unit 1 and the pantograph on-board control unit 14 to end charging.

[0037] Among them, the charging pile-end control system also includes a charging bow return detection unit 10, which is respectively connected to the charging bow controller module 2 and the charging bow 6 by electrical signals. The charging bow return detection unit 10 is used to detect whether the charging bow 6 is returned to its position and send a data signal to the charging bow controller module 2.

[0038] This solution uses bidirectional ultrasonic ranging technology to detect vehicles and detect the real-time position of the charging bow, solving the problem of misalignment of the interconnection and mutual control between vehicles and charging piles. This technology is jointly completed by the pile-end ultrasonic ranging unit 11, the vehicle-end ultrasonic ranging unit 12, the pile-end wireless communication unit 5, the vehicle-end wireless communication unit 7, the charging bow controller module 2 and the pantograph on-board control unit 14. The charging bow controller module 2 is also electrically connected to the pile-end ultrasonic ranging unit 11, and the pantograph on-board control unit 14 is electrically connected to the vehicle-end ultrasonic ranging unit 12. The pile-end ultrasonic ranging unit 11 and the vehicle-end ultrasonic ranging unit 12 are used to detect the vehicle and detect the real-time position of the charging bow.

[0039] The laser detection and ground parking space marker light control technology and the video-assisted positioning unit 13 assist the driver to accurately align the vehicle. This technology is jointly completed by the laser detection and ground parking space marker light control unit 9, the video-assisted positioning unit 13, the charging pantograph controller module 2 and the pantograph vehicle control unit 14. The video-assisted positioning unit 13 is used to assist in the alignment of the vehicle and the charging pile.

[0040] Through two-way wireless communication, the system control interconnection and mutual control and charging communication interconnection and independence are realized. This technology is jointly completed by the charging pile control unit 1, the charging bow controller module 2, the pile end wireless communication unit 5, the vehicle end wireless communication unit 7, the pantograph vehicle control unit 14, the BMS battery management system 15, the vehicle control screen system 16 and the vehicle ECU control unit 17.

[0041] By detecting the pressure through proximity detection and the back-force spring piece, the pressure of the charging bow 6 is kept constant. This technology is jointly implemented by the charging pile control unit 1, the charging bow controller module 2, the back-force spring piece and the proximity detection unit 4.

[0042] The DC servo motor mechanical self-locking realizes zero current locking of the charging bow and the pantograph. This technology is completed by the charging pile control unit 1, the charging bow controller module 2, the motor mechanical self-locking / limit drive control unit 3 and the return spring and proximity detection unit 4.

[0043] In order to enable unmanned vehicles to complete automatic charging, this technology is jointly completed by a charging pile control unit 1, a charging bow controller module 2, a motor mechanical self-locking / limit drive control unit 3, a rebound spring and proximity detection unit 4, a pile-end wireless communication unit 5, a charging bow 6, a vehicle-end wireless communication unit 7, a pantograph 8, a laser detection and ground parking light control unit 9, a charging bow return detection unit 10, a pile-end ultrasonic ranging unit 11, a vehicle-end ultrasonic ranging unit 12, a video-assisted positioning unit 13, a pantograph on-board control unit 14, a BMS battery management system 15, an on-board control screen system 16 and a vehicle ECU control unit 17.

[0044] The main body of the scheme can provide multiple charging bow slots, and only one vehicle is allowed to be interconnected and controlled during charging. The first connected vehicle has priority, and the later connected vehicle will only be prompted that the system is busy and occupied, and interconnection is not allowed. The scheme discloses an intelligent interconnection and control system for charging bows of electric vehicles, which is a stable, reliable and safe DC fast charging system for electric vehicles after the combination and coordination of multiple units and modules. After the system is working, each charging device can support a maximum output current of 800A. The charging pile can be compatible with the installed charging bow 6 and the traditional charging gun at the same time, and can be switched intelligently according to different usage requirements, so that the two charging modes complement each other. An intelligent interconnection and control system for charging bows of electric vehicles can achieve the control effect of charging at the same time, which not only fills the industry gap of the ability to replenish electricity while driving, but also is compatible with the original charging gun interface to replenish electricity.

[0045] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An intelligent interconnection and control system for electric vehicle charging bows, characterized in that: Including charging pile control system and vehicle control system, The charging pile end control system comprises a charging pile control unit (1), a motor mechanical self-locking / limiting drive control unit (3), a pile end wireless communication unit (5), a charging pantograph (6) and a vehicle alignment control unit; The pile-end wireless communication unit (5) is electrically connected to the charging pile control unit (1) for interconnection with the vehicle-end control system; The motor mechanical self-locking / limiting driving control unit (3), the charging bow (6) and the charging pile control unit (1) are electrically connected to each other; after receiving a signal from the vehicle-side control system, the charging bow (6) drives the motor mechanical self-locking / limiting driving control unit (3) through the charging pile control unit (1) to complete the bow lowering operation; and the charging pile control unit (1) transmits the bow lowering information to the vehicle-side control system; The vehicle alignment control unit is connected to the charging pile control unit (1) by electrical signals, and the alignment of the vehicle and the charging pile is completed by cooperating with the vehicle-side control system; The vehicle-side control system comprises a vehicle ECU control unit (17), an on-board control panel system (16), and a pantograph on-board control unit (14); the vehicle ECU control unit (17), the on-board control panel system (16), and the pantograph on-board control unit (14) are electrically connected to each other by signals; and the pantograph on-board control unit (14) is also electrically connected to the vehicle-side wireless communication unit (7) and the pantograph (8), respectively; The vehicle-side wireless communication unit (7), the pantograph onboard control unit (14) and the vehicle ECU control unit (17) are connected by electrical signals; the vehicle-side wireless communication unit (7) is used to interconnect signals with the charging pile-side wireless communication unit (5); and the vehicle ECU control unit (17) is used to complete the alignment of the vehicle and the charging pile with the vehicle alignment control unit; The pantograph (8), the pantograph on-board control unit (14), and the on-board control panel system (16) are electrically connected to the vehicle ECU control unit (17); the on-board control panel system (16) is used to select an operation mode; the pantograph on-board control unit (14) is used to detect the data connection between the pantograph (8) and the charging pantograph (6); after the connection is completed, a charging request is initiated to the charging pile control unit (1) to complete the charging; the charging pantograph (6) is provided with a charging pantograph connection detection unit (61) and a charging pantograph temperature detection and heating unit (62); the pantograph (8) is provided with a pantograph connection detection unit (61) and a charging pantograph temperature detection and heating unit (62); The charging pile control unit (1) and the motor mechanical self-locking / limiting drive control unit (3) are also electrically connected to a charging bow controller module (2), and the charging bow controller module (2) is used to control the motor mechanical self-locking / limiting drive control unit (3) to complete the connection between the charging pile control unit (1) and the motor mechanical self-locking / limiting drive control unit (3). The charging pantograph (6) is retracted, and a signal indicating that the pantograph has been retracted into position is sent to the charging pile control unit (1) and the pantograph vehicle control unit (14), thereby terminating the charging; the pile-end wireless communication unit comprises a pile-end WIFI1 (51) and a pile-end WIFI2 (52); the vehicle-end wireless communication unit comprises a vehicle-end WIFI1 (71) and a vehicle-end WIFI2 (72); and a BMS battery management system (15) is electrically connected between the vehicle ECU control unit (17) and the vehicle-end wireless communication unit (7); the pile-end WIFI1 (51) and the vehicle-end WIFI2 (72) are electrically connected to each other. FI1 (71) is used to send a charging signal to the BMS battery management system (15); the pile-end WIFI2 (52) and the vehicle-end WIFI2 (72) are used to send charging request data signals to the charging bow (6) and the pantograph (8) respectively; the charging bow controller module (2) is also electrically connected to a pile-end ultrasonic ranging unit (11), and the pantograph on-board control unit (14) is electrically connected to a vehicle-end ultrasonic ranging unit (12); the pile-end ultrasonic ranging unit (11) and the vehicle-end ultrasonic ranging unit (12) are used to detect the vehicle and detect the real-time position of the charging bow.

2. The intelligent interconnection and mutual control system for charging bows of electric vehicles as claimed in claim 1, characterized in that: A return spring and a proximity detection unit (4) are also electrically connected between the motor mechanical self-locking / limiting drive control unit (3) and the charging pantograph (6); the return spring and the proximity detection unit (4) are used to detect the pressure between the charging pantograph (6) and the pantograph (8) to keep the pressure of the charging pantograph constant.

3. The intelligent interconnection and mutual control system for charging bows of electric vehicles as claimed in claim 1, characterized in that: The charging pile end control system further comprises a charging bow return detection unit (10), the charging bow return detection unit (10) being respectively connected to the charging bow controller module (2) and the charging bow (6) by electrical signals, the charging bow return detection unit (10) being used to detect whether the charging bow (6) is returned to its position, and to send a data signal to the charging bow controller module (2).

4. The intelligent interconnection and mutual control system for charging bows of electric vehicles as claimed in claim 1, characterized in that: The charging pantograph temperature detection and heating unit (62) and the pantograph temperature detection and heating unit (82) are used to detect and control the surface temperature of the charging pantograph (6) and the pantograph (8), respectively.

5. The electric vehicle charging bow intelligent interconnection and control system as claimed in claim 1, characterized in that: The vehicle-mounted control screen system (16) is also electrically connected to a video-assisted positioning unit (13), and the video-assisted positioning unit (13) is used to assist in completing the alignment of the vehicle and the charging pile.

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