A charging gun redundant control system for a charging pile

Abstract

The present invention discloses a redundant control system for charging guns of a charging pile, which belongs to the technical field of charging piles. The technical problem to be solved is that the control board fails in the case of a single gun and a single control, resulting in failure to charge. It includes a dual-channel control board, which is a state acquisition board and a charging control board; the state acquisition board is configured with a gun line state acquisition interface, a CAN interface and a processor MCU, wherein the processor MCU serves as a state acquisition MCU; the charging control board is configured with a processor MCU, a BMS communication interface, an inter-board communication interface, a charging module communication interface and a charging module control line interface; the charging control MCU is used to control the charging process based on the gun line state and the vehicle BMS state stored in its onboard FLASH.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a redundant control system for charging guns of a charging pile. Background Art

[0002] At present, the dual-gun DC charging integrated machines on the market all adopt a single-gun single-control and power-sharing control strategy. Once a problem occurs in one control board, the charging gun on that line will fail and cannot be charged. Although the charging pile can report the fault status in time, the maintenance of the charging pile still takes several days, which will not only have a certain impact on the user's charging experience, but also affect the revenue of the charging station.

[0003] In the case of a single gun and single control, the control board failure causes the inability to charge, which is a computing problem that needs to be solved. Summary of the invention

[0004] The technical task of the present invention is to address the above shortcomings and provide a redundant control system for a charging gun of a charging pile to solve the technical problem of being unable to charge due to a control board failure in the case of a single gun and a single control.

[0005] The present invention provides a redundant control system for charging guns of a charging pile, comprising a dual-channel control board, namely a state acquisition board and a charging control board;

[0006] The state acquisition board is configured with a gun line state acquisition interface, a CAN interface and a processor MCU, wherein the processor MCU serves as a state acquisition MCU;

[0007] The charging control board is equipped with a processor MCU, a BMS communication interface, an inter-board communication interface, a charging module communication interface and a charging module control line interface, wherein the MCU is used as a charging control MCU, and the charging control MCU has four CAN buses, namely CAN1, CAN2, CAN3 and CAN4, which communicate with one charging gun in the dual guns through CAN1, communicate with the other charging gun in the dual guns through CAN2, communicate with the charging module through CAN3, communicate between boards through CAN4, and communicate with the status acquisition board;

[0008] The gun line status acquisition interface is used to collect the gun line status, store the gun line status in the onboard FLASH of the status acquisition MCU, and upload the gun line status to the charging control MCU through inter-board communication. The BMS communication interface is used to collect the vehicle BMS status and upload the vehicle BMS status to the charging control MCU. The charging control MCU is used to control the charging process based on the gun line status and vehicle BMS status stored in its onboard FLASH.

[0009] Preferably, the status acquisition board is also equipped with a door lock / gun lock / emergency stop switch acquisition module, a temperature sensor, an insulation detection circuit and a DC contactor.

[0010] Preferably, the charging control board is also provided with a DC electric energy meter collection interface.

[0011] Preferably, the charging control board is used to monitor the vehicle BMS signal in two ways through two charging control heartbeat signals;

[0012] The onboard FLASH of the charging control board is set with the board status. When the heartbeat signals of the two charging control boards are normal, the two control boards are numbered CC1 and CC2 respectively. When a single control board fails, the other control board cannot detect the heartbeat signal of the failed control board, then the remaining normal control board automatically changes its board status number to CC3, and the two-way charging process is centrally processed by the control board numbered CC3.

[0013] Preferably, when the heartbeat signals of the two-way charging control boards are normal, the control board numbered CC1 and the control board numbered CC2 save the two-way charging information fed back by the BMS in the onboard Flash of the charging control board by monitoring the BMS signal, and perform charging control according to the real-time CAN data. When the heartbeat monitoring of the two-way charging control board fails, the control board numbered CC3 centrally reads the two-way charging information stored in the onboard Flash of the charging control board to perform charging control, and reports the fault information to the background monitoring platform at the same time;

[0014] Among them, the dual-channel charging information includes charging level requirements, required voltage, required current, and fault information.

[0015] Preferably, the charging control board interacts with the charging module via the CAN bus to achieve current sharing of multiple charging modules, and performs balanced control of the charging modules according to a preconfigured charging strategy based on voltage information, current information, power information, and the cumulative usage time and cumulative number of uses of the charging modules.

[0016] Preferably, the data of the status acquisition board interacts with the charging control board through the inter-board communication CAN interface, and the status of the two gun lines is distinguished by the CANID number.

[0017] Preferably, the charging control board exchanges data with the interactive control module of the charging pile through the inter-board communication CAN interface, and displays and reports relevant information of the charging process.

[0018] The redundant control system of the charging gun of a charging pile of the present invention has the following advantages: the two control boards back up each other to form a redundant control system, the status acquisition board is separated from the charging control board, the vehicle BMS signal is monitored in two ways at the same time, the heartbeat is monitored between the charging terminal control boards, and when a single way fails, the other way takes over the charging process, which can enhance the system stability of the dual-gun charging pile integrated machine, reduce the risk of failure, and improve the user's charging experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] The present invention is further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is a structural block diagram of the control board in the charging gun control system of the existing charging pile;

[0022] Figure 2 This is a structural block diagram of a state acquisition board in a redundant control system of a charging gun of a charging pile in Example 1;

[0023] Figure 3 This is a structural block diagram of a charging control board in a redundant control system of a charging gun of a charging pile according to Example 1. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments may be combined with each other.

[0025] An embodiment of the present invention provides a redundant control system for a charging gun of a charging pile, which is used to solve the technical problem that charging cannot be performed due to a control board failure in a single-gun single-control situation.

[0026] Example:

[0027] The present invention discloses a redundant control system for charging guns of a charging pile, comprising a dual-channel control board, which are a state acquisition board and a charging control board.

[0028] The status acquisition board is configured with a gun line status acquisition interface, a CAN interface and a processor MCU, wherein the processor MCU serves as the status acquisition MCU; the charging control board is configured with a processor MCU, a BMS communication interface, an inter-board communication interface, a charging module communication interface and a charging module control line interface, wherein the MCU serves as a charging control MCU, and the charging control MCU has four CAN buses, namely CAN1, CAN2, CAN3 and CAN4, and communicates with one charging gun in the dual guns through CAN1, communicates with the other charging gun in the dual guns through CAN2, communicates with the charging module through CAN3, communicates between boards through CAN4, and communicates with the status acquisition board.

[0029] The gun line status acquisition interface is used to collect the gun line status, store the gun line status in the onboard FLASH of the status acquisition MCU, and upload the gun line status to the charging control MCU through inter-board communication. The BMS communication interface is used to collect the vehicle BMS status and upload the vehicle BMS status to the charging control MCU. The charging control MCU is used to control the charging process based on the gun line status and vehicle BMS status stored in its onboard FLASH.

[0030] In this embodiment, the status acquisition board is also equipped with a door lock / gun lock / emergency stop switch acquisition module, a temperature sensor, an insulation detection circuit and a DC contactor, and the charging control board is also equipped with a DC power meter acquisition interface.

[0031] This embodiment divides the original charging terminal control board into a state acquisition board and a charging control board, wherein the state acquisition board retains the gun line state acquisition, door lock / gun / emergency stop switch acquisition, temperature acquisition, insulation detection, MCU, DC, CAN communication, etc. The charging control board is selected to have an MCU board with 4-way CAN communication, and the charging control board retains the functional interfaces such as DC energy meter acquisition, BMS communication, inter-board communication, charging module communication, and charging module control line. CAN1 communicates with gun No. 1, CAN2 communicates with gun No. 2, CAN3 communicates with the charging module, CAN4 communicates between boards, and communicates with the state acquisition board at the same time.

[0032] Due to the consistency of the vehicle BMS communication signal, the charging control board in this embodiment is used to monitor the vehicle BMS signal in two ways through two-way charging control heartbeat signals; the board status is set in the onboard FLASH of the charging control board. When the heartbeat signals of the two charging control boards are normal, the two-way control boards are numbered CC1 and CC2 respectively. When a single-way control board fails, the other control board cannot detect the heartbeat signal of the failed control board, then the remaining normal control board automatically modifies its board status number to CC3, and the two-way charging process is centrally processed by the control board numbered CC3.

[0033] When the heartbeat signals of the two-way charging control boards are normal, the control board numbered CC1 and the control board numbered CC2 monitor the BMS signal to store the dual-way charging information fed back by the BMS in the onboard Flash of the charging control board, and perform charging control according to the real-time CAN data. When the heartbeat monitoring of the two-way charging control boards fails, the control board numbered CC3 centrally reads the dual-way charging information stored in the onboard Flash of the charging control board to perform charging control, and reports the fault information to the background monitoring platform at the same time; wherein, the dual-way charging information includes charging level requirements, required voltage, required current, and fault information.

[0034] The charging control board interacts with the charging module through the CAN bus to achieve current sharing of multiple charging modules, and performs balanced control of the charging modules according to the pre-configured charging strategy based on voltage information, current information, power information, and the cumulative usage time and cumulative number of times the charging modules are used.

[0035] The data of the status acquisition board interacts with the charging control board through the inter-board communication CAN interface. The status of the two gun lines is distinguished by the CANID number to avoid control failures due to data confusion.

[0036] The charging control board exchanges data with the interactive control module of the charging pile through the inter-board communication CAN interface, and displays and reports relevant information of the charging process.

[0037] In this embodiment, the board status and real-time charging information of the charging control board can be saved in the onboard Flash so that the control board can take over the dual-channel charging process. Charging records, fault alarms and other information can be stored in the data storage module so that data can be saved in an offline state and retransmitted after the network is restored.

[0038] The present invention has been shown and described in detail above through the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above multiple embodiments, those skilled in the art can know that the means in the above different embodiments can be combined to obtain more embodiments of the present invention, and these embodiments are also within the protection scope of the present invention.

Claims

1. A charging gun redundant control system for a charging pile, characterized in that: It includes two control boards, namely a status acquisition board and a charging control board; The state acquisition board is equipped with a gun line state acquisition interface, a CAN interface and a processor MCU, a door lock / gun lock / emergency stop switch acquisition module, a temperature sensor, an insulation detection circuit and a DC contactor, wherein the processor MCU on the state acquisition board serves as the state acquisition MCU; The charging control board is equipped with a processor MCU, a BMS communication interface, an inter-board communication interface, a charging module communication interface, a charging module control line interface and a DC energy meter acquisition interface, wherein the MCU on the charging control board serves as a charging control MCU, and the charging control MCU has four CAN buses, namely CAN1, CAN2, CAN3 and CAN4, and communicates with one charging gun in the dual guns through CAN1, communicates with the other charging gun in the dual guns through CAN2, communicates with the charging module through CAN3, and communicates between boards through CAN4 and communicates with the status acquisition board; The gun line status acquisition interface is used to acquire the gun line status, store the gun line status in the onboard FLASH of the status acquisition MCU, and upload the gun line status to the charging control MCU through inter-board communication. The BMS communication interface is used to acquire the vehicle BMS status and upload the vehicle BMS status to the charging control MCU. The charging control MCU is used to control the charging process based on the gun line status and the vehicle BMS status stored in its onboard FLASH; The charging control board is used to monitor the vehicle BMS signal in two ways through the two-way charging control board heartbeat signal. The board status is set in the onboard FLASH of the charging control board. When the heartbeat signals of the two-way charging control boards are normal, the two-way control boards are numbered CC1 and CC2 respectively. The control board numbered CC1 and the control board numbered CC2 save the two-way charging information fed back by the BMS in the onboard Flash of the charging control board by monitoring the BMS signal, and perform charging control according to the real-time CAN data. When a single-way control board fails, the other control board cannot detect the heartbeat signal of the failed control board, then the remaining normal state control board automatically modifies its board status number to CC3, and the control board numbered CC3 centrally reads the two-way charging information stored in the onboard Flash of the charging control board to perform charging control, and reports the fault information to the background monitoring platform at the same time; wherein the two-way charging information includes charging level requirements, required voltage, required current, and fault information; The charging control board interacts with the charging module through the CAN bus to achieve current sharing of multiple charging modules, and performs balanced control of the charging modules according to the pre-configured charging strategy based on voltage information, current information, power information, and the cumulative usage time and cumulative number of times the charging modules are used.

2. The redundant control system for charging guns of a charging pile according to claim 1, characterized in that: The data of the status acquisition board interacts with the charging control board through the inter-board communication interface CAN, and the status of the two gun lines is distinguished by the CANID number.

3. The redundant control system for charging guns of a charging pile according to claim 1, characterized in that: The charging control board exchanges data with the interactive control module of the charging pile through the inter-board communication interface CAN, and displays and reports relevant information of the charging process.

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