Vehicle and multi-gun charging control method and device

Abstract

The invention belongs to the technical field of new energy vehicle charging control, and particularly relates to a vehicle and a multi-gun charging control method and device. The BMS of the vehicle is provided with N paths of communication units which are respectively used for interacting with each charging gun of the charging pile, and when the charging pile is a non-independent multi-gun charging pile, the vehicle is controlled to adopt a master-slave multi-gun charging mode; according to the mode, charging gun handshake messages are subjected to mutual unvarnished transmission through the BMS, when one charging gun receives a starting instruction, the charging gun normally interacts with the charging pile, and charging pile messages, sent by the charging pile, of the other charging guns are sent to the BMS; and the returned handshake message and the received other charging gun handshake messages returned by the BMS are sent to the charging pile, and the charging pile starts a non-independent multi-gun charging mode after receiving the handshake messages, so that the problem that a vehicle in an existing independent multi-gun charging mode cannot be subjected to multi-gun charging by using the non-independent multi-gun charging charging pile is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle charging control, and in particular relates to a vehicle and multi-gun charging control method and device. Background Art

[0002] In recent years, the battery capacity of new energy electric vehicles has become larger and larger, which has put forward higher requirements and challenges for the charging rate of pure electric vehicles. Therefore, in order to shorten the charging time and increase the charging rate, a multi-gun charging mode has been developed. The multi-gun charging mode includes independent multi-gun charging mode and non-independent multi-gun charging mode, such as independent dual-gun charging mode and non-independent dual-gun charging mode. In the independent dual-gun charging mode, the vehicle is equipped with two CAN channels for interaction between BMS and charging piles. Each charging gun of the charging pile interacts with BMS through one CAN channel. When charging, a single or two charging guns of the same charging pile can be used to charge the vehicle, or charging guns of different charging piles can be used to charge the vehicle at the same time. The power output of each charging gun is independently controlled. In this mode, the charging current can reach 500A when dual-gun charging, which greatly improves the charging rate of large-capacity batteries. In the non-independent dual-gun charging mode, dual-gun charging can only be performed by two charging guns of one charging pile, such as Figure 1 As shown in the figure, the vehicle is only equipped with one CAN for interaction between BMS and charging pile, and the two charging guns share one CAN. The two charging guns of the charging pile are internally connected by CAN, so the two charging guns are in the same CAN network, and the output power of the two charging guns is coordinated and controlled. In this mode, the charging current can reach 400A when dual-gun charging.

[0003] When charging with two independent guns, after the vehicle is plugged into the charging gun, the customer needs to click the start button of each charging gun on the charging pile in turn. When clicking the start button of the first charging gun, the first charging gun will send the first charging gun handshake message obtained through the interaction between CAN1 and BMS to the charging pile, and the charging pile will start the first charging gun after confirmation; when clicking the start button of the second charging gun, the second charging gun will send the second charging gun handshake message obtained through the interaction between CAN2 and BMS to the charging pile, and the charging pile will start the second charging gun after confirmation. Before starting the non-independent dual-gun charging, the two charging guns will perform handshake interaction. When charging with two independent guns, after the vehicle is plugged into the charging gun, the customer only needs to click the start button of one charging gun on the charging pile, for example, click the start button of the first charging gun, the first charging gun will perform normal charging handshake interaction with BMS through the CAN channel, and send the charging pile message of the second charging gun to BMS at the same time. The first charging gun will send the first charging gun handshake message returned by BMS and the second charging gun handshake message to the charging pile, and the charging pile will start the non-independent dual gun after receiving the message containing two charging guns sent by one charging gun. Since clicking the start button of a charging gun requires a code scan for identity authentication, customers are required to scan the code for identity authentication twice when charging with two independent guns. Charging piles that are not for charging with two independent guns only support one code scan for identity authentication. Therefore, when a vehicle in independent multi-gun charging mode encounters a charging pile that is not for charging with two independent guns, the charging pile cannot be used to charge the vehicle with multiple guns, affecting the customer's car experience. Summary of the invention

[0004] The object of the present invention is to provide a vehicle, a multi-gun charging control method and a device, so as to solve the problem that a vehicle in an independent multi-gun charging mode cannot perform multi-gun charging when encountering a charging pile of a non-independent multi-gun charging.

[0005] In order to solve the above technical problems, the present invention provides a multi-gun charging control method, comprising: The vehicle's BMS is provided with N communication units, which are respectively used to interact with each charging gun of the charging pile, where N is greater than or equal to 2; When the charging pile is a non-independent multi-gun charging pile, the vehicle is controlled to adopt the master-slave multi-gun charging mode; when charging in this mode, after the vehicle is connected to the charging gun, the BMS and each charging gun interact with each other through the corresponding communication unit, and return the handshake message of each charging gun; after one of the charging guns receives the start command, the charging gun sends its own handshake message returned by the BMS and the handshake messages of the remaining charging guns returned by the BMS to the charging pile, and sends the charging pile messages of the remaining charging guns sent by the charging pile to the BMS. After receiving the message, the charging pile starts the non-independent multi-gun charging mode.

[0006] Furthermore, when the charging pile is an independent multi-gun charging pile, the vehicle is controlled to adopt an independent multi-gun charging mode.

[0007] Furthermore, the charging mode adopted by the vehicle is controlled by remote control.

[0008] Furthermore, the remote control is APP control, and the charging mode adopted by the vehicle is controlled according to the instructions issued by the APP.

[0009] Furthermore, when the vehicle adopts the independent multi-gun charging mode, single-gun or multi-gun independent charging is performed according to the number of charging guns connected to the vehicle.

[0010] The beneficial effects of the above technical solution are: on the basis of the independent multi-gun charging vehicle charging mode whose hardware device remains unchanged, a master-slave multi-gun charging mode suitable for non-independent charging pile multi-gun charging is added. The master-slave multi-gun charging mode is to transparently transmit the handshake messages of each charging gun to each other through the BMS, so that one charging gun does not only output the message of the charging gun information, but outputs the handshake message containing the charging gun and other charging guns to the charging pile. Therefore, the customer only needs to start one of the charging guns connected to the vehicle and only needs to scan the code once for identity authentication. The charging gun will send a message containing all the charging guns connected to the vehicle to the charging pile. After the non-independent multi-gun charging charging pile recognizes the multi-gun handshake message sent by a charging gun, the non-independent multi-gun charging mode can be started to control the charging current output by each gun, which solves the problem that vehicles in the existing independent multi-gun charging mode cannot use the non-independent multi-gun charging pile for multi-gun charging.

[0011] In order to solve the above technical problems, the present invention also provides a multi-gun charging control device, including a BMS for a vehicle, wherein the BMS for the vehicle is provided with N communication units, which are respectively used to interact with each charging gun of the charging pile, N is greater than or equal to 2, and when the charging pile is a non-independent multi-gun charging pile, the BMS is used to control the vehicle to adopt a master-slave multi-gun charging mode; when charging in this mode, after the vehicle is connected to the charging gun, the BMS and each charging gun perform handshake interaction through the corresponding communication unit, and return a handshake message of each charging gun; after one of the charging guns receives the start command, the charging gun sends its own handshake message returned by the BMS and the handshake messages of the remaining charging guns returned by the BMS to the charging pile, and sends the charging pile messages of the remaining charging guns sent by the charging pile to the BMS, and the charging pile starts the non-independent multi-gun charging mode after receiving the message.

[0012] Furthermore, the BMS is also used to control the vehicle to adopt an independent multi-gun charging mode when the charging pile is an independent multi-gun charging pile.

[0013] Furthermore, a remote control unit is included, and the remote control unit is used to send instructions to the BMS. After receiving the instructions, the BMS controls the charging mode adopted by the vehicle.

[0014] Furthermore, the remote control unit is an APP.

[0015] The beneficial effects of the above technical solution are: on the basis of the independent multi-gun charging vehicle charging mode whose hardware device remains unchanged, a master-slave multi-gun charging mode suitable for non-independent charging pile multi-gun charging is added. The master-slave multi-gun charging mode is to transparently transmit the handshake messages of each charging gun to each other through the BMS, so that one charging gun does not only output the message of the charging gun information, but outputs the handshake message containing the charging gun and other charging guns to the charging pile. Therefore, the customer only needs to start one of the charging guns connected to the vehicle and only needs to scan the code once for identity authentication. The charging gun will send a message containing all the charging guns connected to the vehicle to the charging pile. After the non-independent multi-gun charging charging pile recognizes the multi-gun handshake message sent by a charging gun, the non-independent multi-gun charging mode can be started to control the charging current output by each gun, which solves the problem that vehicles in the existing independent multi-gun charging mode cannot use the non-independent multi-gun charging pile for multi-gun charging.

[0016] To solve the above technical problems, the present invention also provides a vehicle, including a BMS for the vehicle, wherein the BMS for the vehicle is provided with N communication units, which are respectively used to interact with each charging gun of the charging pile, and N is greater than or equal to 2. The vehicle is charged using the multi-gun charging control method introduced above.

[0017] The beneficial effects of the above technical solution are: on the basis of the independent multi-gun charging vehicle charging mode whose hardware device remains unchanged, a master-slave multi-gun charging mode suitable for non-independent charging pile multi-gun charging is added. The master-slave multi-gun charging mode is to transparently transmit the handshake messages of each charging gun to each other through the BMS, so that one charging gun does not only output the message of the charging gun information, but outputs the handshake message containing the charging gun and other charging guns to the charging pile. Therefore, the customer only needs to start one of the charging guns connected to the vehicle and only needs to scan the code once for identity authentication. The charging gun will send a message containing all the charging guns connected to the vehicle to the charging pile. After the non-independent multi-gun charging charging pile recognizes the multi-gun handshake message sent by a charging gun, the non-independent multi-gun charging mode can be started to control the charging current output by each gun, which solves the problem that vehicles in the existing independent multi-gun charging mode cannot use the non-independent multi-gun charging pile for multi-gun charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the charging principle in the non-independent dual-gun charging mode in the prior art; Figure 2 It is a structural schematic diagram of a multi-gun charging control device of a vehicle embodiment of the present invention; Figure 3 is a flow chart of charging mode switching of a vehicle embodiment of the present invention; Figure 4 1 is a flow chart of charging control of a vehicle embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings.

[0020] The present invention adds a master-slave multi-gun charging mode suitable for multi-gun charging of non-independent charging piles on the basis of the unchanged hardware device of the existing independent multi-gun charging mode vehicle. The master-slave multi-gun charging mode is to mutually transparently transmit the handshake messages of each charging gun through the BMS, so that one charging gun does not only output the message of the charging gun information, but outputs the handshake message containing the charging gun and other charging guns to the charging pile. Therefore, the customer only needs to start one charging gun, that is, only one start operation is needed. The charging gun will output a message containing all the charging guns inserted into the vehicle to the charging pile. After the non-independent multi-gun charging charging pile recognizes the multi-gun handshake message sent by one charging gun, the non-independent multi-gun charging can be started. Therefore, when encountering an independent multi-gun charging pile, the vehicle is set to the independent multi-gun charging mode, and when encountering a non-independent multi-gun charging pile, the vehicle is set to the master-slave multi-gun charging mode. The switching of the two modes solves the problem that the vehicle in the existing independent multi-gun charging mode cannot use the non-independent multi-gun charging pile for multi-gun charging.

[0021] Vehicle Example A vehicle of the present invention includes a multi-gun charging control device, wherein the number of the multi-gun charging guns is greater than or equal to 2. The multi-gun charging control device includes a BMS of the vehicle, and the BMS of the vehicle is provided with N communication units, N is greater than or equal to 2, and is respectively used to interact with each charging gun of the charging pile, that is, each charging gun exchanges information with the BMS through an independent communication unit, and N is generally 2 to 5, such as Figure 2 As shown, N is 2, BMS interacts with charging gun 1 through charging CAN1, and BMS interacts with charging gun 2 through charging CAN2. The current of the charging gun is delivered to the battery (PACK) through the vehicle's power distribution unit (PDU) for charging. The vehicle is charged based on a multi-gun charging control device that is set up, using a multi-gun charging control method, which is described in detail below.

[0022] 1. Charging mode.

[0023] The charging modes include independent multi-gun charging mode and master-slave multi-gun charging mode. Figure 3As shown, the charging mode can only be switched if the vehicle's factory BMS is configured in independent multi-gun charging mode or master-slave multi-gun charging mode, that is, the vehicle's hardware architecture is that the vehicle is configured with N communication units for interaction between the BMS and the charging guns. If the vehicle's factory BMS is configured in non-independent charging mode, that is, the vehicle's hardware architecture is that the vehicle is configured with one communication unit for interaction between the BMS and multiple charging guns, switching the charging mode is not allowed under this condition. The communication unit can use a CAN line or other communication devices.

[0024] The device also includes a remote control unit, which can control the charging mode of the vehicle by remote control. In order to facilitate user use, the remote control unit is an APP, which can be set on a mobile phone or a display screen on the vehicle end. The user controls the vehicle to switch the charging mode by operating the mobile phone APP or the vehicle display screen. The APP and BMS exchange information through the CAN line. The APP obtains information about the current charging mode of the vehicle and whether the charging mode can be switched from the BMS. If the BMS allows remote switching of the current charging mode, the user can issue an instruction on whether to switch to a non-current charging mode through the APP. The BMS switches the BMS charging mode according to the instruction issued by the APP, that is, controls the charging mode of the vehicle, sets the vehicle to an independent multi-gun charging mode or a master-slave multi-gun charging mode, and stores the switched charging mode after executing the mode switch. When the vehicle's factory BMS is configured for non-independent charging mode, the APP switch button is set to an unavailable state.

[0025] 2. Charge according to the vehicle's charging mode.

[0026] like Figure 4 As shown, when the charging pile is an independent multi-gun charging pile, the BMS controls the vehicle to adopt the independent multi-gun charging mode, that is, the vehicle BMS is set to the independent multi-gun charging mode. In this mode, single-gun or multi-gun independent charging is performed according to the number of inserted charging guns.

[0027] When the charging pile is a non-independent multi-gun charging pile, the BMS controls the vehicle to adopt the master-slave multi-gun charging mode, that is, the vehicle BMS is set to the master-slave multi-gun charging mode. When entering and exiting charging in the master-slave multi-gun charging mode, after the vehicle is connected to the charging gun, the BMS and each charging gun interact with each other through the corresponding communication unit to obtain the handshake message of each charging gun; after one of the charging guns receives the start command, the charging gun sends its own handshake message returned by the BMS and the handshake messages of the remaining charging guns returned by the BMS to the charging pile, and sends the charging pile message of the remaining charging guns sent by the charging pile to the BMS. After receiving the message, the charging pile starts the non-independent multi-gun charging mode.

[0028] Specifically, the started charging gun and the charging pile perform a normal handshake interaction during the charging process, and obtain the handshake message of the gun returned by the BMS; the charging pile messages of the remaining charging guns sent by the charging pile are sent to the BMS through the start charging gun, and the BMS mutually transmits the returned handshake messages of each charging gun, and sends the handshake messages of other charging guns to the start charging gun through the corresponding communication unit. The started charging gun sends its own handshake message returned by the BMS and the handshake messages of the remaining charging guns returned by the BMS to the charging pile. After the charging pile receives the multi-gun handshake message sent by the gun, it starts the non-independent multi-gun charging mode. The start command can be issued by clicking the start button of the charging gun, issued by voice control, etc., and there is no restriction here.

[0029] For example, in a specific implementation, when the number of charging guns is 2, the two charging CANs of the independent dual guns are mutually transparently transmitted through the BMS, such as Figure 2 As shown: After the vehicle is connected to the dual charging guns, one charging gun is started, and the started charging gun interacts normally with the charging pile, sends the charging pile message of the gun to the BMS, and forwards the charging pile message of the other charging gun to the BMS. After the BMS detects the message from the charging pile, it executes the normal charging process message: interacts with charging gun 1 through charging CAN1 to obtain the handshake message of charging gun 1; BMS interacts with charging gun 2 through charging CAN2 to obtain the handshake message of charging gun 2. While executing the normal charging process message, BMS sends the handshake message of charging gun 2 received from charging CAN2 to charging gun 1 through charging CAN1, and at the same time sends the message of charging gun 1 received from charging CAN1 to charging gun 2 through charging CAN2; so that charging gun 1 of the charging pile can receive the message sent by gun 2 of the charging pile, and charging gun 2 of the charging pile can also receive the message sent by gun 1 of the charging pile. The two charging CANs are processed into one charging CAN through the software virtual channel, and the non-independent dual-gun handshake of the charging pile is realized, so that after clicking the start button of one of the charging guns, the charging gun can send a message containing two charging guns to the charging pile. After the charging pile recognizes the charging gun message, it starts the non-independent dual-gun charging mode and controls each charging gun to output the charging current to charge the vehicle.

[0030] Device Embodiment A multi-gun charging control device of the present invention includes a BMS of a vehicle. The BMS of the vehicle is provided with N communication units, which are respectively used to interact with each charging gun of the charging pile. N is greater than or equal to 2. The device is the multi-gun charging control device introduced in the above vehicle embodiment and will not be repeated here.

[0031] Method Embodiment The specific implementation process of the multi-gun charging control method of the present invention has been described in detail in the vehicle embodiment and will not be repeated here.

[0032] The multi-gun charging control scheme of the present invention can realize multi-gun charging of vehicles in independent multi-gun charging mode under independent multi-gun charging piles and non-independent multi-gun charging piles without modifying the vehicle hardware, and can meet the user's demand for starting multiple charging guns by sending only one charging gun start command.

Claims

1. A multi-gun charging control method, characterized in that: include: The vehicle's BMS is provided with N communication units, which are respectively used to interact with each charging gun of the charging pile, where N is greater than or equal to 2; When the charging pile is a non-independent multi-gun charging pile, the vehicle is controlled to adopt the master-slave multi-gun charging mode; when charging in this mode, after the vehicle is connected to the charging gun, the BMS and each charging gun interact with each other through the corresponding communication unit and return the handshake message of each charging gun; After one of the charging guns receives the start command, the charging gun sends its own handshake message returned by the BMS and the handshake messages of the remaining charging guns returned by the BMS to the charging pile, and sends the charging pile messages of the remaining charging guns sent by the charging pile to the BMS. After receiving the messages, the charging pile starts the non-independent multi-gun charging mode.

2. The multi-gun charging control method according to claim 1, characterized in that: When the charging pile is an independent multi-gun charging pile, the vehicle is controlled to adopt the independent multi-gun charging mode.

3. The multi-gun charging control method according to claim 1 or 2, characterized in that: Control the vehicle's charging mode through remote control.

4. The multi-gun charging control method according to claim 3, characterized in that: The remote control is APP control, and the charging mode of the vehicle is controlled according to the instructions issued by the APP.

5. The multi-gun charging control method according to claim 2, characterized in that: When the vehicle adopts the independent multi-gun charging mode, single-gun or multi-gun independent charging is performed according to the number of charging guns connected to the vehicle.

6. A multi-charger control device, comprising a vehicle BMS, wherein the vehicle BMS is provided with N communication units, respectively used to interact with each charging gun of a charging pile, N being greater than or equal to 2, characterized in that: When the charging pile is a non-independent multi-gun charging pile, the BMS is used to control the vehicle to adopt the master-slave multi-gun charging mode; when charging in this mode, after the vehicle is connected to the charging gun, the BMS and each charging gun interact with each other through the corresponding communication unit and return the handshake message of each charging gun; After one of the charging guns receives the start command, the charging gun sends its own handshake message returned by the BMS and the handshake messages of the remaining charging guns returned by the BMS to the charging pile, and sends the charging pile messages of the remaining charging guns sent by the charging pile to the BMS. After receiving the messages, the charging pile starts the non-independent multi-gun charging mode.

7. The multi-gun charging control device according to claim 6, characterized in that: The BMS is also used to control the vehicle to adopt an independent multi-gun charging mode when the charging pile is an independent multi-gun charging pile.

8. The multi-gun charging control device according to claim 6 or 7, characterized in that: It also includes a remote control unit, which is used to send instructions to the BMS. After receiving the instructions, the BMS controls the charging mode of the vehicle.

9. The multi-gun charging control device according to claim 8, characterized in that: The remote control unit is an APP.

10. A vehicle, comprising a BMS of the vehicle, wherein the BMS of the vehicle is provided with N communication units, respectively used to interact with each charging gun of a charging pile, N being greater than or equal to 2, characterized in that: The vehicle is charged using the multi-gun charging control method described in any one of claims 1-5.

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