A method, apparatus, vehicle, and storage medium for charging a vehicle.

Abstract

This application provides a method, apparatus, vehicle, and storage medium for vehicle charging. The method includes: acquiring output capability parameters of the charging device when communication between the charging device and the vehicle has not yet begun; controlling the vehicle to enter a charging mode matching the output capability parameters; and during communication between the charging device and the vehicle, when it is necessary to send voltage parameters of the power battery to the charging device, sending voltage parameters corresponding to the charging mode to the charging device. When the charging mode is a series charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries connected in series in the vehicle; when the charging mode is a parallel charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries connected in parallel. This method can reduce the number of communications between the vehicle and the charging pile while being compatible with series and parallel charging of the power battery, thus improving the compatibility of series and parallel charging.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more specifically, to a method, apparatus, vehicle, and storage medium for charging a vehicle. Background Technology

[0002] Currently, most electric vehicles in China still operate at voltage levels between 400V and 600V. An 800V voltage platform charging solution represents an improvement over the traditional 400V-600V voltage platform, with voltages generally above 750V.

[0003] Currently, most charging piles on the market are still 400V charging piles. The industrial chain for 800V charging piles and 800V vehicle-mounted high-voltage components is not yet fully developed. Due to limitations such as the lack of widespread adoption of high-voltage charging piles adapted to the 800V platform, as well as cost and technology factors, even though the high-voltage components of electric vehicles have adopted the 800V voltage platform, their charging still needs to be compatible with 400V charging piles. Using two 400V power batteries in series and parallel can be compatible with both 800V and 400V charging piles (series 800V / parallel 400V). However, due to the limitations of the national standard GBT 27930-2015 "Communication Protocol between Off-board Conductive Charger and Battery Management System of Electric Vehicles" (hereinafter referred to as "National Standard 27930"), which specifies the communication process between vehicles, current charging methods are difficult to be compatible with series and parallel charging. Even if compatibility is possible, multiple communications between the vehicle and the charging pile are required. Therefore, how to reduce the number of communications between the vehicle and the charging pile while being compatible with series and parallel charging of power batteries has become an urgent problem to be solved. Summary of the Invention

[0004] This application provides a method, apparatus, vehicle, and storage medium for charging a vehicle. The method can reduce the number of communications between the vehicle and the charging pile while being compatible with series and parallel charging of the power battery, thus improving the compatibility of series and parallel charging.

[0005] In a first aspect, a method for charging a vehicle is provided, the method comprising: acquiring output capability parameters of the charging device when communication between the charging device and the vehicle has not yet begun; controlling the vehicle to enter a charging mode matching the output capability parameters; and, during communication between the charging device and the vehicle, sending voltage parameters corresponding to the charging mode to the charging device when it is necessary to send voltage parameters of the power battery to the charging device; wherein, when the charging mode is a series charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries in the vehicle connected in series, and when the charging mode is a parallel charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of the multiple power batteries connected in parallel.

[0006] In the above technical solution, the vehicle can obtain the output capability parameters of the charging equipment in advance, even before communication begins between the charging equipment and the vehicle. Based on these pre-determined output capability parameters, the vehicle can be controlled to enter a charging mode matching these parameters. During communication between the charging equipment and the vehicle, when the vehicle needs to send the voltage parameters of the power battery to the charging equipment, it can directly send the voltage parameters corresponding to the charging mode. Since the voltage parameters corresponding to the charging mode match the output capability parameters of the charging equipment, charging can be successfully initiated through this single communication. When the charging mode is a series charging mode, the corresponding voltage parameters include the voltage parameters of multiple power batteries connected in series in the vehicle. When the charging mode is a parallel charging mode, the corresponding voltage parameters include the voltage parameters of multiple power batteries connected in parallel. In other words, the above technical solution is compatible with both series and parallel charging modes of the power battery. Based on the pre-obtained output capability parameters of the charging equipment, a matching charging mode is selected for charging, eliminating the need for multiple communications to obtain a matching charging mode. This reduces the number of communications between the vehicle and the charging equipment while ensuring compatibility with both series and parallel charging of the power battery, thus improving the compatibility of series and parallel charging.

[0007] In conjunction with the first aspect, in some possible implementations, obtaining the output capability parameters of the charging device includes: obtaining the output capability parameters of the charging device sent by the user terminal; wherein, after obtaining the output capability parameters of the charging device, the user terminal sends the output capability parameters to the vehicle.

[0008] In conjunction with the first aspect, in some possible implementations, obtaining the output capability parameters of the charging device sent by the user terminal includes: obtaining the output capability parameters of the charging device sent by the user terminal through a cloud server; wherein, after receiving the output capability parameters sent by the user terminal, the cloud server sends the output capability parameters to the vehicle.

[0009] In conjunction with the first aspect, in some possible implementations, obtaining the output capability parameters of the charging device sent by the user terminal through the cloud server includes: receiving the output capability parameters of the charging device sent by the cloud server through the wireless communication vehicle-mounted system Tbox in the vehicle; and receiving the output capability parameters of the charging device sent by the Tbox through the BMS in the vehicle.

[0010] In conjunction with the first aspect, in some possible implementations, obtaining the output capability parameters of the charging device includes: obtaining the location of a target device; wherein the target device is the vehicle or a user terminal; and determining the output capability parameters of the charging device corresponding to the location based on the location.

[0011] In conjunction with the first aspect, in some possible implementations, after acquiring the output capability parameters of the charging device, the method further includes: sending target information to a user terminal so that the user terminal can remind the user to connect the charging device to the vehicle; wherein the target information is used to indicate that the vehicle has successfully acquired the output capability parameters.

[0012] In conjunction with the first aspect, in some possible implementations, controlling the vehicle to enter a charging mode matching the output capability parameters includes: if the output capability parameters include the voltage parameters of the multiple power batteries connected in series, then determining that the charging mode matching the output capability parameters is a series charging mode, and controlling the multiple power batteries to be connected in series; if the output capability parameters include the voltage parameters of the multiple power batteries connected in parallel, then determining that the charging mode matching the output capability parameters is a parallel charging mode, and controlling the multiple power batteries to be connected in parallel.

[0013] Secondly, a vehicle charging device is provided, comprising: an acquisition module for acquiring output capability parameters of the charging device when communication between the charging device and the vehicle has not yet begun; a control module for controlling the vehicle to enter a charging mode matching the output capability parameters; and a transmission module for transmitting voltage parameters corresponding to the charging mode to the charging device when it is necessary to transmit voltage parameters of the power battery to the charging device during communication between the charging device and the vehicle; wherein, when the charging mode is a series charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries in the vehicle connected in series, and when the charging mode is a parallel charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of the multiple power batteries connected in parallel.

[0014] In conjunction with the second aspect, in some possible implementations, the acquisition module is specifically used to acquire the output capability parameters of the charging device sent by the user terminal; wherein, after acquiring the output capability parameters of the charging device, the user terminal sends the output capability parameters to the vehicle.

[0015] In conjunction with the second aspect, in some possible implementations, the acquisition module is specifically used to acquire the output capability parameters of the charging device sent by the user terminal through a cloud server; wherein, after receiving the output capability parameters sent by the user terminal, the cloud server sends the output capability parameters to the vehicle.

[0016] In conjunction with the second aspect, in some possible implementations, the acquisition module is specifically used to receive the output capability parameters of the charging device sent by the cloud server through the wireless communication vehicle-mounted system Tbox in the vehicle; and to receive the output capability parameters of the charging device sent by the Tbox through the BMS in the vehicle.

[0017] In conjunction with the second aspect, in some possible implementations, the acquisition module is specifically used to acquire the location of the target device; wherein the target device is the vehicle or the user terminal; and based on the location, the output capability parameters of the charging device corresponding to the location are determined.

[0018] In conjunction with the second aspect, in some possible implementations, the above-mentioned device further includes a feedback module for sending target information to a user terminal so that the user terminal can remind the user to connect the charging device to the vehicle; wherein the target information is used to indicate that the vehicle has successfully acquired the output capability parameters.

[0019] In conjunction with the second aspect, in some possible implementations, the control module is specifically used to determine, if the output capability parameter includes the voltage parameter of the multiple power batteries connected in series, the charging mode matching the output capability parameter is a series charging mode, and control the multiple power batteries to be connected in series; if the output capability parameter includes the voltage parameter of the multiple power batteries connected in parallel, the charging mode matching the output capability parameter is a parallel charging mode, and control the multiple power batteries to be connected in parallel.

[0020] Thirdly, a vehicle is provided, including a memory and a processor. The memory is used to store executable program code, and the processor is used to call and run the executable program code from the memory, causing the vehicle to perform the methods of the first aspect or any possible implementation thereof.

[0021] Fourthly, a computer program product is provided, comprising: computer program code, which, when run on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof.

[0022] Fifthly, a computer-readable storage medium is provided that stores computer program code, which, when executed on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof. Attached Figure Description

[0023] Figure 1 This is a flowchart of a secondary communication process after a user inserts a gun, as described in existing technology.

[0024] Figure 2 This is a flowchart of a vehicle charging method provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of a vehicle charging method provided in an embodiment of this application;

[0026] Figure 4 This is a flowchart of another vehicle charging method provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of a vehicle charging device provided in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. Detailed Implementation

[0029] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0030] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0031] With the rapid development of new energy vehicles, more and more electric vehicles are entering the market. Charging, as an essential function of electric vehicles, generally includes the following:

[0032] 1. Charging at home: 220V sockets for home users come in two specifications: 10A and 16A. It takes about 8-10 hours to fully charge.

[0033] 2. Charging at an AC charging station: Connect the electric vehicle to an AC power grid with a higher current output and charge using an AC charging station. Charging time is approximately 4 hours. Slow charging stations typically have power ratings of 3.5kW and 7kW, depending on the rated input power of the on-board charger. Currently, the rated input current of on-board chargers is mainly divided into two categories: 16A and 32A.

[0034] 3. Charging at a DC charging station: Use DC power supply equipment with control and guidance functions. A high-power off-board DC charger directly outputs DC power to charge the vehicle battery. During charging, the DC charging station needs to provide a voltage matching the battery. National standards stipulate that the maximum DC output current should not exceed 250A, and most electric vehicles can obtain a peak charging power of no more than 102.5kW.

[0035] The charging time for an electric vehicle depends on the battery pack's energy and the charging power. Higher charging power results in shorter charging time. Charging power is determined by the charging voltage and charging current; therefore, to shorten charging time, both the charging current and the charging voltage need to be increased.

[0036] Compared to high-current fast charging, high-voltage fast charging has more obvious advantages. According to the thermodynamic formula Q = I... 2 Increasing the current (Rt) leads to greater heating in the electrical system, placing a significant burden on the thermal management system. Simultaneously, it results in lower energy conversion efficiency and substantial energy loss. In contrast, high-voltage charging, with its advantages of low cost, lightweight design, low electromagnetic interference, and lower technical difficulty, has become the mainstream approach for fast charging technology development at present.

[0037] Currently, most electric vehicles in China still operate at voltage levels between 400V and 600V. An 800V voltage platform charging solution represents an improvement over the traditional 400V-600V voltage platform, with voltages generally above 750V.

[0038] Currently, most charging stations on the market are still 400V charging stations. The industrial chain for 800V charging stations and 800V vehicle-mounted high-voltage components is not yet fully developed. Due to limitations such as the lack of widespread adoption of high-voltage charging stations adapted to the 800V platform, as well as cost and technology factors, even though the high-voltage components of electric vehicles have adopted the 800V voltage platform, their charging still needs to be compatible with 400V charging stations. Using two 400V power batteries connected in series and parallel can achieve compatibility with both 800V and 400V charging stations (series 800V / parallel 400V).

[0039] The national standard GB / T 27930-2015, "Communication Protocol between Off-board Conductive Charger and Battery Management System for Electric Vehicles" (hereinafter referred to as "GB / T 27930"), specifies the communication process for vehicle-to-charger interaction. According to GB / T 27930's vehicle-to-charger communication process, the vehicle must first report its current voltage via a communication message. Only then will the charging pile report its output capacity parameters. The charging pile will then verify whether the difference between the actual detected battery voltage and the "actual battery voltage" reported by the vehicle via the communication message matches. If the charging pile determines that the actual detected battery voltage matches the battery voltage in the communication message, the charging pile will charge normally; otherwise, it will stop charging.

[0040] To ensure that the battery voltage reported by the vehicle to the charging pile matches the actual battery voltage detected by the charging pile, the vehicle first needs to send the voltage of the power battery in parallel connection (e.g., 400V) to the charging pile. Then, after learning the charging pile's capability, the vehicle adjusts accordingly based on the charging pile's output capacity parameters. When the vehicle learns that the charging pile is an 800V charging pile, it needs to send the actual 800V voltage again via "secondary communication." This ensures that the battery voltage in the communication message matches the actual battery voltage detected by the charging pile, allowing DC charging to proceed normally. The flowchart of the secondary communication after the user plugs in the charging gun is as follows: Figure 1 As shown:

[0041] Step 101: The DC charging pile sends a charger handshake message (CHM) to the electric vehicle.

[0042] Step 102: The electric vehicle sends a handshake message (BHM) to the DC charging pile's Battery Management System (BMS) → sending the maximum permissible total charging voltage (400V). That is, the BMS handshake message carries the maximum permissible total charging voltage (400V) of the BMS.

[0043] Step 103: The DC charging pile sends a charger identification message (CRM) to the electric vehicle == 0X00 (before receiving the BMS identification message, the charging pile sends an acknowledgment code == 0X00, indicating that the charging pile cannot identify the BMS).

[0044] Step 104: The electric vehicle sends the BMS and Vehicle Identification Message (BRM) → sends the rated total voltage of the power battery (400V). That is, the rated total voltage of the power battery (400V) is carried in the BMS and Vehicle Identification Message.

[0045] Step 105: The DC charging pile sends a charger identification message (CRM) == 0XAA to the electric vehicle (after receiving the BMS identification message, the charging pile sends an acknowledgment code == 0XAA to indicate that the charging pile can identify the BMS).

[0046] Step 106: The electric vehicle sends a power battery charging parameter message to the DC charging station → maximum allowable total charging voltage (400V). That is, the power battery charging parameter message carries the maximum allowable total charging voltage (400V).

[0047] Step 107: The DC charging pile sends a maximum output capacity message (CML) to the electric vehicle, indicating the maximum output voltage, minimum output voltage, maximum output current, and minimum output current.

[0048] Step 108: The electric vehicle control closes K5 / K6. K5 / K6 are fast-charging high-voltage relays.

[0049] Step 109: Insulation monitoring.

[0050] Step 110: When the maximum output capacity of the charging pile is received as 800V, the BMS does not send a battery charging ready status message (BRO).

[0051] Step 111: The charging station determines that the communication has timed out.

[0052] Step 112: Charging process complete.

[0053] Step 113: The DC charging pile resends the charger identification message (CRM) == 0X00 (before receiving the BMS identification message, the charging pile sends an acknowledgment code == 0X00, indicating that the charging pile cannot identify the BMS).

[0054] Step 114: The electric vehicle sends the BMS and Vehicle Identification Message (BRM) → sends the rated total voltage of the power battery (800V). That is, the rated total voltage of the power battery (800V) is carried in the BMS and Vehicle Identification Message.

[0055] Step 115: The DC charging pile sends a charger identification message (CRM) == 0XAA to the electric vehicle (after receiving the BMS identification message, the charging pile sends an acknowledgment code == 0XAA to indicate that the charging pile can identify the BMS).

[0056] Step 116: The electric vehicle sends a power battery charging parameter message (BCP) → maximum allowable total charging voltage (800V).

[0057] Step 117: The DC charging pile sends a maximum output capacity message (CML) to the electric vehicle, indicating the maximum output voltage, minimum output voltage, maximum output current, and minimum output current.

[0058] However, some charging stations on the market currently do not support "secondary communication" (because the battery voltage sent by the vehicle to the charging station in two separate communication messages is inconsistent, causing some charging stations to be unable to support charging). However, the interaction process in the national standard GB 27930 stipulates that the vehicle's battery management system (BMS) must first send the power battery voltage parameters to the charging station before the charging station sends the output capability parameters to the vehicle. Therefore, according to GB 27930, the vehicle cannot know the charging station's output capability parameters before sending the battery voltage parameters to the charging station.

[0059] As can be seen from the above, due to the limitations of the national standard 27930 regarding vehicle-to-vehicle communication procedures, current charging methods are difficult to be compatible with series and parallel charging. Even if compatibility were possible, multiple communications between the vehicle and the charging station would be required, such as those mentioned above. Figure 1The text discusses the concepts of "primary communication" and "secondary communication." Therefore, a key challenge is how to reduce the number of communications between the vehicle and the charging station while maintaining compatibility with series and parallel charging of the power battery.

[0060] To address the aforementioned technical problems, this application provides a vehicle charging method, applicable to vehicles, specifically to the vehicle's Battery Management System (BMS). In this embodiment, before the charging device and the vehicle begin communication, the vehicle can obtain the output capacity parameters of the charging device in advance. This allows the vehicle to determine whether the current charging operation is series or parallel, and accordingly send voltage parameters to the charging device. This facilitates completing charging with a single communication, further improving the compatibility of series and parallel battery charging.

[0061] Figure 2 This is a schematic flowchart illustrating a vehicle charging method provided in an embodiment of this application.

[0062] For example, such as Figure 2 As shown, the method includes:

[0063] Step 201: Obtain the output capability parameters of the charging device before the charging device and the vehicle start communicating.

[0064] Step 202: Control the vehicle to enter a charging mode that matches the above output capability parameters.

[0065] Step 203: During the communication between the charging device and the vehicle, when it is necessary to send the voltage parameters of the power battery to the charging device, the voltage parameters corresponding to the charging mode are sent to the charging device. Specifically, when the charging mode is a series charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries connected in series in the vehicle; when the charging mode is a parallel charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries connected in parallel.

[0066] exist Figure 2In the illustrated embodiment, the vehicle can obtain the output capability parameters of the charging device in advance before communication between the charging device and the vehicle begins. This allows the vehicle to be controlled to enter a charging mode matching the pre-determined output capability parameters. During communication between the charging device and the vehicle, when the vehicle needs to send the voltage parameters of the power battery to the charging device, it can directly send the voltage parameters corresponding to the charging mode. Since the voltage parameters corresponding to the charging mode match the output capability parameters of the charging device, charging can be successfully initiated through this single communication. When the charging mode is a series charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries connected in series in the vehicle. When the charging mode is a parallel charging mode, the voltage parameters corresponding to the charging mode include the voltage parameters of multiple power batteries connected in parallel. In other words, the above technical solution is compatible with both series and parallel charging modes of the power battery. Based on the pre-obtained output capability parameters of the charging device, a matching charging mode is selected for charging, eliminating the need for multiple communications to obtain a matching charging mode. This reduces the number of communications between the vehicle and the charging device while ensuring compatibility with both series and parallel charging of the power battery, thus improving the compatibility of series and parallel charging.

[0067] The following is about Figure 2 The specific implementation methods of each step in the illustrated embodiment are explained below:

[0068] In step 201, the charging device is a device capable of charging the power battery in the vehicle, such as a charging pile, which can specifically be a DC charging pile. The vehicle can be a power vehicle that includes a power battery pack, which includes at least two power batteries. The series-parallel connection of the power battery pack can be controlled by a relay, that is, the connection of at least two power batteries in series or in parallel can be controlled.

[0069] In this embodiment, the BMS in the vehicle can acquire the output capability parameters of the charging device even before communication between the charging device and the vehicle begins. These output capability parameters characterize the charging capacity of the charging device. For example, the output capability parameters can be those of the aforementioned DC charging pile, including: maximum output voltage, minimum output voltage, maximum output current, and minimum output current.

[0070] For example, if the charging equipment and the vehicle have not yet started communicating, it can be understood that the charging equipment and the vehicle have not yet established a connection. Establishing a connection here can be understood as the charging gun of the charging equipment being inserted into the vehicle's charging port. For instance, if the charging gun of the DC charging station is not yet inserted into the vehicle's charging port, it can be determined that the charging equipment and the vehicle have not started communicating. Conversely, if the charging gun of the DC charging station is inserted into the vehicle's charging port, it can be determined that the charging equipment and the vehicle have started communicating. Figure 1As shown, after the user plugs in the charging gun, it can be confirmed that the charging equipment and the vehicle have started communicating.

[0071] In this embodiment, before the user plugs in the charging gun, the vehicle and the charging equipment have not yet communicated, allowing the vehicle to obtain the output capacity parameters of the charging equipment in advance. Figure 1 In the process, after the user plugs in the charging gun, the vehicle and the charging equipment begin to communicate. The vehicle can only obtain the output capability parameters of the charging equipment during the communication process. For example, in the "first communication", the vehicle can only obtain the output capability parameters of the charging equipment in step 107, and in the "second communication", the vehicle can only obtain the output capability parameters of the charging equipment in step 117.

[0072] For example, the implementation of obtaining the output capability parameters of the charging device in step 201 above may include: obtaining the output capability parameters of the charging device sent by the user terminal. After obtaining the output capability parameters of the charging device, the user terminal sends the output capability parameters to the vehicle, specifically to the BMS in the vehicle. The user terminal can be a portable device such as a user's mobile phone or smartwatch, and an application (App) can be installed on the user terminal to obtain the output capability parameters of the charging device.

[0073] For example, when a user drives their vehicle to a charging station and wants to charge it, they can open the aforementioned app installed on their device. This app provides functions such as nameplate scanning, nameplate photography, and charging station selection. Through these three exemplary functions, the user's device can obtain the output capacity parameters of the charging station. The following is a detailed explanation of these three functions:

[0074] In one possible implementation, the user terminal can obtain the output capability parameters of the charging device through a nameplate scanning function. For example, the aforementioned app can provide a first virtual button to activate the nameplate scanning function. When the first virtual button is triggered, the nameplate scanning function is activated, allowing the user terminal to obtain the output capability parameters of the charging device displayed on the nameplate by scanning it.

[0075] In one possible implementation, the user terminal can obtain the output capability parameters of the charging device through the nameplate photo-taking function. For example, the aforementioned App can provide a second virtual button for activating the nameplate photo-taking function. When the second virtual button is triggered, the nameplate photo-taking function is activated, allowing the user terminal to take a picture of the charging device's nameplate, obtain a nameplate image, and then perform image recognition on the nameplate image to obtain the output capability parameters of the charging device displayed in the nameplate image.

[0076] In one possible implementation, the user terminal can obtain the output capability parameters of the charging device through a charging device selection function. For example, the aforementioned app can provide a third virtual button to activate the charging device selection function. When this third virtual button is triggered, the charging device selection function is activated, and the user terminal's screen can display relevant information about available charging devices nearby. This information may include: the distance of the charging device from the user terminal, the output capability parameters of the charging device, the specific location of the charging device, and the device's identifier. The user can then select the desired charging device on the user terminal's screen, allowing the user terminal to obtain the output capability parameters of the selected charging device.

[0077] For example, after obtaining the output capability parameters of the charging device, the user terminal sends these parameters to the BMS (Battery Management System) in the vehicle. For instance, the BMS can be equipped with a communication module, allowing the user terminal to send the obtained output capability parameters to this module, enabling the BMS to obtain the charging device's output capability parameters through the communication module. The communication module in the BMS can be, for example, a Bluetooth module or a Wi-Fi module, meaning that data communication between the BMS and the user terminal can be achieved via Bluetooth or Wi-Fi.

[0078] In an exemplary embodiment, the above-mentioned acquisition of the output capability parameters of the charging device sent by the user terminal includes: acquiring the output capability parameters of the charging device sent by the user terminal through a cloud server; wherein, after receiving the output capability parameters sent by the user terminal, the cloud server sends the output capability parameters to the vehicle.

[0079] In this embodiment, after the user terminal obtains the output capability parameters of the charging device, it can send the output capability parameters to the cloud server (Cloud Backend system, TSP). After receiving the output capability parameters, the TSP can send the output capability parameters to the vehicle.

[0080] For example, a user terminal can be bound to a user's vehicle, so that the output capability parameters sent by the user terminal to the TSP can carry the identifier of the vehicle bound to the user terminal. Thus, the TSP can send the output capability parameters to the vehicle with the identified identifier based on the identified vehicle identifier.

[0081] In an exemplary embodiment, the above-mentioned acquisition of the output capability parameters of the charging device sent by the user terminal through the cloud server includes: receiving the output capability parameters of the charging device sent by the cloud server through the wireless communication in-vehicle system (Telematics Box, Tbox) in the vehicle; and receiving the output capability parameters of the charging device sent by the Tbox through the BMS in the vehicle.

[0082] In this embodiment, after receiving the output capability parameters obtained by the user terminal, the TSP can send the output capability parameters to the Tbox in the vehicle. The Tbox then sends the output capability parameters to the BMS, so that the BMS can finally obtain the output capability parameters of the charging device.

[0083] For example, a user terminal can be bound to a user's vehicle, so that the output capability parameters sent by the user terminal to the TSP can carry the identifier of the vehicle bound to the user terminal. The TSP can then send the output capability parameters to the Tbox in the vehicle with the identified vehicle identifier.

[0084] For example, the user terminal and the vehicle can be bound by the account of the App installed on the user terminal. After the user terminal obtains the output capability parameters of the charging device through the App, it sends the output capability parameters to the TSP. The TSP identifies the account of the App that sent the output capability parameters and the vehicle bound to the account of the App. Thus, the TSP can send the output capability parameters to the Tbox in the identified vehicle.

[0085] In this embodiment, the communication link between the user terminal, TSP, Tbox, and BMS is used to send the output capability parameters obtained by the user terminal to the BMS. That is, the transmission of the output capability parameters is achieved by using the communication link that most vehicles already have, so that the BMS can obtain the output capability parameters without building a new communication link.

[0086] In an exemplary embodiment, the method for obtaining the output capability parameters of the charging device in step 201 above may include: obtaining the location of the target device; wherein the target device is a vehicle or a user terminal; and determining the output capability parameters of the charging device corresponding to the location based on the location.

[0087] For example, the location of the vehicle or user terminal can be obtained through the GPS positioning function in the vehicle or user terminal. Then, based on the location, the output capability parameters of the charging device corresponding to that location are determined. Specifically, the output capability parameters of the charging device corresponding to the location of the target device can be determined based on the pre-stored correspondence between location and the output capability parameters of the charging device. This correspondence can also be understood as the correspondence between the location of the charging device and its output capability parameters. Since the location of the vehicle and the user terminal is usually the location of the charging device when a user needs to charge the vehicle, this embodiment can determine the output capability parameters of the charging device corresponding to the location of the target device based on the location of the target device and the above correspondence. The above correspondence can be stored in the TSP, in the vehicle's storage space, or in the user terminal's storage space; however, this embodiment does not specifically limit the storage location of the above correspondence.

[0088] In an exemplary embodiment, after obtaining the output capability parameters of the charging device as described above, the method may further include: sending target information to a user terminal so that the user terminal can remind the user to connect the charging device to the vehicle; wherein, the target information is used to indicate that the vehicle has successfully obtained the output capability parameters.

[0089] For example, the BMS can send target information to the user terminal through its internal communication module to remind the user to connect the charging equipment to the vehicle. For instance, after recognizing that the user terminal has received the target information, the user can insert the charging gun of the charging equipment into the vehicle's charging port to establish a connection between the charging equipment and the vehicle. Thus, the vehicle and the charging equipment can begin communication according to the communication process specified in GB / T 27930.

[0090] For example, the BMS can send the target information to the Tbox, the Tbox sends the target information to the TSP, and then the TSP sends the target information to the user terminal, so that the user terminal can remind the user that it is time to insert the charging gun of the charging device into the vehicle's charging port.

[0091] In this embodiment, by sending target information indicating that the vehicle has successfully obtained the output capability parameters to the user terminal, the user is reminded to connect the charging device to the vehicle. This ensures that the communication process between the vehicle and the charging device will only begin after the vehicle has successfully obtained the output capability parameters of the charging device, further ensuring that charging can be successfully completed with "one communication".

[0092] In step 202, the BMS can first determine a charging mode that matches the output capability parameters, and then control the vehicle to enter the charging mode that matches the output capability parameters. There is a corresponding matching relationship between the output capability parameters of the charging equipment and the charging mode of the power battery. Therefore, the BMS can determine the charging mode that matches the output capability parameters based on this matching relationship and control the vehicle to enter the determined charging mode.

[0093] In an exemplary embodiment, step 202 may be implemented as follows: if the output capability parameters include the voltage parameters of multiple power batteries connected in series, then the charging mode matching the output capability parameters is determined to be the series charging mode, and the multiple power batteries are controlled to be connected in series. If the output capability parameters include the voltage parameters of multiple power batteries connected in parallel, then the charging mode matching the output capability parameters is determined to be the parallel charging mode, and the multiple power batteries are controlled to be connected in parallel.

[0094] For example, if the output capability parameter of the charging device includes 800V, then the charging mode matching the output capability parameter is determined to be the series charging mode. If the output capability parameter of the charging device includes 400V, then the charging mode matching the output capability parameter is determined to be the parallel charging mode. Here, 800V refers to the voltage parameter of two 400V power batteries connected in series, and 400V refers to the voltage parameter of two 400V power batteries connected in parallel.

[0095] In this embodiment, if the charging mode matching the output capability parameters is determined to be a series charging mode, multiple power batteries can be connected in series via a relay to enable the vehicle to enter the series charging mode. If the charging mode matching the output capability parameters is determined to be a parallel charging mode, multiple power batteries can be connected in parallel via a relay to enable the vehicle to enter the parallel charging mode.

[0096] In step 203, during the communication between the charging device and the vehicle, when the BMS needs to send the voltage parameters of the power battery to the charging device, since the BMS has already obtained the output capability parameters of the charging device, the BMS can directly send the voltage parameters corresponding to the charging mode that match the output capability parameters of the charging device.

[0097] Specifically, when the charging mode is a series charging mode, the corresponding voltage parameter includes the voltage parameters of multiple power batteries connected in series in the vehicle. When the charging mode is a parallel charging mode, the corresponding voltage parameter includes the voltage parameters of multiple power batteries connected in parallel. For example, when the charging mode is a series charging mode consisting of two 400V power batteries connected in series, the corresponding voltage parameter is 800V. When the charging mode is a parallel charging mode consisting of two 400V power batteries connected in parallel, the corresponding voltage parameter is 400V.

[0098] For example, see Figure 1 In the vehicle-to-charging communication process of GB / T 27930, the steps for the BMS to send the voltage parameters of the power battery to the charging equipment may include steps 102, 104, and 106. In this embodiment, the maximum allowable total charging voltage carried in the BMS handshake message sent by the BMS is the voltage parameter corresponding to the aforementioned charging mode. The rated total voltage of the power battery carried in the BMS and vehicle identification message sent by the BMS is the voltage parameter corresponding to the aforementioned charging mode. The maximum allowable total charging voltage carried in the power battery charging parameter message sent by the BMS is the voltage parameter corresponding to the aforementioned charging mode.

[0099] In other words, when the BMS needs to send the BMS handshake message, the BMS and vehicle identification message, and the power battery charging parameter message, it can be determined that the BMS needs to send the power battery voltage parameters to the charging equipment. Therefore, when sending the BMS handshake message, the BMS and vehicle identification message, and the power battery charging parameter message, the voltage parameters corresponding to the above charging modes can be directly carried.

[0100] In an exemplary embodiment, a schematic diagram of the above-described vehicle charging method can be found in [reference needed]. Figure 3 The following is combined with Figure 3 Instructions for charging the vehicle:

[0101] Step 1: Before charging, use your mobile app to scan the output capacity parameters on the DC charging station's nameplate.

[0102] Step 2: The mobile app sends the DC charging pile parameters obtained from the scan to the TSP; that is, the mobile app sends the output capacity parameters obtained in step 1 to the TSP.

[0103] Step 3: TSP synchronizes the DC charging pile parameters to Tbox; that is, TSP sends the output capability parameters sent from the mobile app to Tbox.

[0104] Step 4: The Tbox sends the DC charging pile parameters to the BMS; that is, the Tbox sends the output capability parameters from the TSP to the BMS.

[0105] Before receiving the output capacity parameters of the DC charging pile from the Tbox, the BMS does not interact with the DC charging pile. After receiving the output capacity parameters, the BMS determines whether to perform series charging or parallel charging based on the output capacity parameters, and sends the corresponding voltage parameters of the power battery (the voltage parameters of the power battery after series connection or the voltage parameters of the power battery after parallel connection) to the DC charging pile.

[0106] In an exemplary embodiment, a flowchart of the above-described vehicle charging method can be found. Figure 4 ,include:

[0107] S1. When a user drives their vehicle to a DC charging station, they can use a mobile app to scan the nameplate of the DC charging station to obtain the output capacity parameters of the DC charging station.

[0108] S2. Information is uploaded to the cloud, that is, the mobile app sends the output capacity parameters of the DC charging pile to the cloud.

[0109] S3. Information is synchronized to Tbox, that is, the cloud sends the output capability parameters of the DC charging pile to Tbox.

[0110] S4. Information is sent to the BMS, meaning the Tbox sends the output capacity parameters of the DC charging pile to the BMS. When the BMS identifies the charging pile as a 400V specification charging pile, it enters parallel charging mode. When the BMS identifies the charging pile as an 800V specification charging pile, it enters series charging mode.

[0111] After receiving the maximum output capacity parameter of the charging pile, S5 and BMS feed it back to Tbox. That is, after receiving the output capacity parameter of the DC charging pile, BMS returns target information indicating that the output capacity parameter has been successfully obtained to Tbox.

[0112] S6. Feedback information to TSP, that is, Tbox sends the target information to the cloud TSP.

[0113] S7. Feedback information to the mobile app, that is, the cloud TSP sends the target information to the mobile app.

[0114] S8. The mobile app reminds the user to plug in the charging gun, that is, the mobile app reminds the user to plug the DC charging station's charging gun into the vehicle's charging port.

[0115] S9, User inserts gun.

[0116] S10: The DC charging pile sends a charger handshake message (CHM) to the electric vehicle.

[0117] S11. The electric vehicle sends a BMS handshake message (BHM) to the DC charging pile → sends the maximum permissible total charging voltage. Specifically, if in S4 above, the BMS identifies the charging pile as a 400V charging pile based on the received output capability parameters, the maximum permissible total charging voltage sent is 400V. If in S4 above, the BMS identifies the charging pile as an 800V charging pile based on the received output capability parameters, the maximum permissible total charging voltage sent is 800V.

[0118] S12. The DC charging pile sends a charger identification message (CRM) to the electric vehicle. The charging pile sends an acknowledgment code of 0X00 before receiving the BMS identification message, indicating that the charging pile cannot identify the BMS.

[0119] S13, The electric vehicle sends a BMS and Vehicle Identification Message (BRM) → sends the rated total voltage of the power battery. Specifically, if in S4 above, the BMS identifies the charging pile as a 400V charging pile based on the received DC charging pile output capability parameters, the sent rated total voltage of the power battery is 400V. If in S4 above, the BMS identifies the charging pile as an 800V charging pile based on the received DC charging pile output capability parameters, the sent rated total voltage of the power battery is 800V.

[0120] S14. The DC charging pile sends a charger identification message (CRM) to the electric vehicle. The charging pile sends an acknowledgment code (0XAA) after receiving the BMS identification message. This indicates that the charging pile can identify the BMS.

[0121] S15. The electric vehicle sends a power battery charging parameter message to the DC charging pile → maximum allowable total charging voltage. Specifically, if in S4 above, the BMS identifies the charging pile as a 400V charging pile based on the received output capability parameters of the DC charging pile, the maximum allowable total charging voltage is 400V. If in S4 above, the BMS identifies the charging pile as an 800V charging pile based on the received output capability parameters of the DC charging pile, the maximum allowable total charging voltage is 800V.

[0122] S16. The DC charging pile sends a message to the electric vehicle indicating the maximum output capacity of the charger (CML) → maximum output voltage / minimum output voltage / maximum output current / minimum output current.

[0123] S17, Close K5 / K6.

[0124] S18, Insulation monitoring.

[0125] S19. The DC charging station sends a Battery Charging Ready Status Message (BRO) to the electric vehicle.

[0126] This embodiment enables a mobile phone to scan the nameplate of a DC charging pile to obtain the output capacity parameters of the DC charging pile and upload them. Through the cloud and the vehicle-side Tbox, the BMS can obtain the output capacity parameters of the DC charging pile in advance. This allows the BMS to obtain the output capacity parameters of the DC charging pile before vehicle-charging pile communication and make a judgment in advance on whether to perform series charging or parallel charging. This allows 800V AC charging to be completed in a single communication, improving charging compatibility and the probability of successful charging.

[0127] Figure 5 This is a schematic diagram of the structure of a vehicle charging device provided in an embodiment of this application.

[0128] For example, such as Figure 5 As shown, the device includes:

[0129] The acquisition module 501 is used to acquire the output capability parameters of the charging device when the charging device and the vehicle have not started communicating.

[0130] Control module 502 is used to control the vehicle to enter a charging mode that matches the output capability parameters;

[0131] The sending module 503 is used to send voltage parameters corresponding to the charging mode to the charging device when it is necessary to send voltage parameters of the power battery to the charging device during the communication between the charging device and the vehicle.

[0132] Wherein, when the charging mode is a series charging mode, the voltage parameter corresponding to the charging mode includes the voltage parameter of the multiple power batteries in the vehicle connected in series; when the charging mode is a parallel charging mode, the voltage parameter corresponding to the charging mode includes the voltage parameter of the multiple power batteries connected in parallel.

[0133] In one possible implementation, the acquisition module 501 is specifically used to acquire the output capability parameters of the charging device sent by the user terminal; wherein, after acquiring the output capability parameters of the charging device, the user terminal sends the output capability parameters to the vehicle.

[0134] In one possible implementation, the acquisition module 501 is specifically used to acquire the output capability parameters of the charging device sent by the user terminal through a cloud server; wherein, after receiving the output capability parameters sent by the user terminal, the cloud server sends the output capability parameters to the vehicle.

[0135] In one possible implementation, the acquisition module 501 is specifically used to receive the output capability parameters of the charging device sent by the cloud server through the wireless communication vehicle-mounted system Tbox in the vehicle; and to receive the output capability parameters of the charging device sent by the Tbox through the BMS in the vehicle.

[0136] In one possible implementation, the acquisition module 501 is specifically used to acquire the location of the target device; wherein the target device is the vehicle or the user terminal; and based on the location, to determine the output capability parameters of the charging device corresponding to the location.

[0137] In one possible implementation, the device further includes a feedback module for sending target information to a user terminal so that the user terminal can remind the user to connect the charging device to the vehicle; wherein the target information is used to indicate that the vehicle has successfully acquired the output capability parameters.

[0138] In one possible implementation, the control module 502 is specifically configured to: if the output capability parameter includes the voltage parameter of the multiple power batteries connected in series, determine that the charging mode matching the output capability parameter is a series charging mode, and control the multiple power batteries to be connected in series; if the output capability parameter includes the voltage parameter of the multiple power batteries connected in parallel, determine that the charging mode matching the output capability parameter is a parallel charging mode, and control the multiple power batteries to be connected in parallel.

[0139] Figure 6 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application.

[0140] For example, such as Figure 6 As shown, the vehicle includes a memory 601 and a processor 602, wherein the memory 601 stores executable program code, and the processor 602 is used to call and execute the executable program code to perform a method for charging the vehicle.

[0141] This embodiment can divide the vehicle into functional modules according to the above method example. For example, each function can be assigned to a separate module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0142] When each functional module is divided according to its corresponding function, the vehicle may include an acquisition module, a control module, a transmission module, etc. It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0143] The vehicle provided in this embodiment is used to perform the above-described vehicle charging method, and therefore can achieve the same effect as the above-described implementation method.

[0144] When using integrated units, the vehicle may include a processing module and a storage module. The processing module is used to control and manage the vehicle's actions. The storage module supports the vehicle in executing program code and data.

[0145] The processing module may be a processor or a controller, which can implement or execute various exemplary logic blocks, modules, and circuits as represented in conjunction with the disclosure of this application. The processor may also be a combination of functions that implement computing capabilities, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc., and the storage module may be a memory.

[0146] This embodiment also provides a computer-readable storage medium storing computer program code. When the computer program code is run on a computer, the computer executes the above-described method steps to implement a vehicle charging method described in the above embodiment.

[0147] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned related steps to implement a vehicle charging method as described in the above embodiment.

[0148] In addition, the vehicle provided in the embodiments of this application may specifically be a chip, component or module. The vehicle may include a connected processor and a memory. The memory is used to store instructions. When the vehicle is running, the processor may call and execute the instructions to make the chip execute a vehicle charging method in the above embodiments.

[0149] In this embodiment, the vehicle, computer-readable storage medium, computer program product, or chip are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects of the corresponding methods provided above, and will not be repeated here.

[0150] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0151] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0152] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for charging a vehicle, characterized in that, The method includes: When the charging device and the vehicle have not started communicating, the output capability parameters of the charging device are obtained; Control the vehicle to enter a charging mode that matches the output capability parameters; During the communication between the charging device and the vehicle, when it is necessary to send the voltage parameters of the power battery to the charging device, the charging device sends the voltage parameters corresponding to the charging mode. Wherein, when the charging mode is a series charging mode, the voltage parameter corresponding to the charging mode includes the voltage parameter of the multiple power batteries in the vehicle connected in series; when the charging mode is a parallel charging mode, the voltage parameter corresponding to the charging mode includes the voltage parameter of the multiple power batteries connected in parallel.

2. The method according to claim 1, characterized in that, The step of obtaining the output capability parameters of the charging device includes: The user terminal obtains the output capability parameters of the charging device sent by the user terminal; wherein, after obtaining the output capability parameters of the charging device, the user terminal sends the output capability parameters to the vehicle.

3. The method according to claim 2, characterized in that, The step of obtaining the output capability parameters of the charging device sent by the user terminal includes: The cloud server obtains the output capability parameters of the charging device sent by the user terminal; wherein, after receiving the output capability parameters sent by the user terminal, the cloud server sends the output capability parameters to the vehicle.

4. The method according to claim 3, characterized in that, The step of obtaining the output capability parameters of the charging device sent by the user terminal through the cloud server includes: The vehicle receives the output capability parameters of the charging device from the cloud server via the wireless communication in-vehicle system Tbox. The vehicle's BMS receives the output capability parameters of the charging device sent by the Tbox.

5. The method according to claim 1, characterized in that, The step of obtaining the output capability parameters of the charging device includes: Obtain the location of the target device; wherein the target device is the vehicle or the user terminal; Based on the location, determine the output capability parameters of the charging device corresponding to the location.

6. The method according to claim 1, characterized in that, After obtaining the output capability parameters of the charging device, the method further includes: The system sends target information to the user terminal so that the user terminal can remind the user to connect the charging device to the vehicle; wherein the target information is used to indicate that the vehicle has successfully acquired the output capability parameters.

7. The method according to any one of claims 1 to 6, characterized in that, The step of controlling the vehicle to enter a charging mode that matches the output capability parameters includes: If the output capability parameter includes the voltage parameter of the multiple power batteries connected in series, then the charging mode that matches the output capability parameter is determined to be the series charging mode, and the multiple power batteries are controlled to be connected in series. If the output capability parameters include the voltage parameters of the multiple power batteries connected in parallel, then the charging mode that matches the output capability parameters is determined to be the parallel charging mode, and the multiple power batteries are controlled to be connected in parallel.

8. A vehicle charging device, characterized in that, The device includes: The acquisition module is used to acquire the output capability parameters of the charging device when the charging device and the vehicle have not started communicating. The control module is used to control the vehicle to enter a charging mode that matches the output capability parameters; The transmitting module is used to send voltage parameters corresponding to the charging mode to the charging device when it is necessary to send the voltage parameters of the power battery to the charging device during the communication between the charging device and the vehicle. Wherein, when the charging mode is a series charging mode, the voltage parameter corresponding to the charging mode includes the voltage parameter of the multiple power batteries in the vehicle connected in series; when the charging mode is a parallel charging mode, the voltage parameter corresponding to the charging mode includes the voltage parameter of the multiple power batteries connected in parallel.

9. A vehicle, characterized in that, The vehicles include: Memory, used to store executable program code; A processor for calling and running the executable program code from the memory, causing the vehicle to perform the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed, implements the method as described in any one of claims 1 to 7.

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