A method for switching working modes of a vehicle control unit (VCU) and related device

Abstract

The application discloses a working mode switching method of a VCU and related devices, and relates to the technical field of intelligent vehicle control. In the application, when it is determined that a driving motor is in a power-on state, a normal working mode is entered, and a first working state of a power battery is inquired according to a preset battery state inquiry period through a BMS. Then, when it is determined that the first working state is a limited charging and discharging current, the normal working mode of the VCU is switched to a battery limited working mode based on battery limited information returned by the BMS. Finally, if the VCU is in the battery limited working mode, and the second working state of the power battery is detected as an unlimited charging and discharging current through the BMS, the battery limited working mode of the VCU is switched to the normal working mode based on battery unlimited information returned by the BMS. In this way, it is ensured that the VCU of the extended-range vehicle can maintain the normal operation of the extended-range vehicle under various working conditions of the power battery.

Description

Technical Field

[0001] This application relates to the field of vehicle intelligent control technology, and in particular to a method and related device for switching the working mode of a VCU. Background Technology

[0002] With the energy crisis and environmental pollution becoming increasingly serious, hybrid vehicles have become a new trend in the field of vehicle development technology, hence the emergence of range-extended vehicles.

[0003] See Figure 1 As shown, range-extended electric vehicles improve the power system based on traditional internal combustion engine vehicles by adding a range extender, a power battery, and a drive motor. The drive motor drives the vehicle to improve the overall economy and power performance.

[0004] Specifically, during the operation of a range-extended vehicle, when the power battery has sufficient charge, the drive motor can operate in pure electric mode to meet the requirements for low emissions. When the power battery is low, the vehicle can run directly without the range extender to drive the wheels, provided that the vehicle does not need to stop, and the drive motor can operate to meet the driving needs of the entire vehicle. In addition, the power battery can be charged through the range extender, which greatly increases the driving range of the electric vehicle.

[0005] It is evident that power batteries play a crucial role in the operation of range-extended vehicles. However, the working condition of power batteries is affected by various factors. For example, the charging and discharging of power batteries is limited under low-temperature conditions.

[0006] Therefore, there is an urgent need for a method to switch the working mode of the Vehicle Control Unit (VCU) to ensure that the VCU of the range-extended vehicle can maintain the normal operation of the range-extended vehicle under various working conditions of the power battery. Summary of the Invention

[0007] This application provides a method and related apparatus for switching the operating mode of a VCU, so as to ensure that the VCU of a range-extended vehicle can operate normally under various operating conditions of the power battery.

[0008] In a first aspect, embodiments of this application provide a method for switching the operating mode of a VCU, applied to a range-extended vehicle, the method comprising:

[0009] When the drive motor is confirmed to be powered on, the system enters normal operating mode and queries the first operating state of the power battery through the battery management system (BMS) according to the preset battery status query cycle.

[0010] When the first operating state is determined to be limited charge and discharge current, the normal operating mode of the VCU is switched to the battery limited operating mode based on the battery limitation information returned by the BMS.

[0011] If the VCU is in a battery-limited operating mode, and the BMS detects that the second operating state of the power battery is that the charging and discharging current is not limited, then based on the battery-unlimited information returned by the BMS, the VCU's battery-limited operating mode is switched to normal operating mode.

[0012] Secondly, embodiments of this application also provide a VCU operating mode switching device, applied to a range-extended vehicle, the device comprising:

[0013] The query module is used to determine when the drive motor is powered on and enter the normal working mode, and to query the first working state of the power battery through the battery management system (BMS) according to the preset battery status query cycle.

[0014] The determination module is used to switch the normal working mode of the VCU to the battery-limited working mode based on the battery limitation information returned by the BMS when the first working state is determined to be limited charging and discharging current.

[0015] The detection module is used to switch the VCU from the battery-limited operating mode to the normal operating mode if the power battery is detected by the BMS to be in the battery-limited operating mode.

[0016] In one possible embodiment, when it is determined that the drive motor is powered on and the system enters normal operating mode, the query module is specifically used for:

[0017] When it is determined that the drive motor is powered on, a constant current operating mode request is sent to the generator controller (GCU) to enable the GCU to enter constant current operating mode.

[0018] When it is determined that the GCU is in constant current operating mode, the expected current information returned by the GCU is received based on the required power generation carried by the constant current operating mode request.

[0019] In one possible embodiment, when the first operating state is determined to be a charge / discharge current limited state, the determination module is specifically used for:

[0020] The state information contained in the first working state is parsed to obtain at least one working characteristic attribute of the power battery;

[0021] When at least one working characteristic attribute is determined, and the characteristic attribute interval to which each belongs satisfies the preset charge / discharge current limiting condition, the first working state is determined to be charge / discharge current limited.

[0022] In one possible embodiment, while the VCU is in a battery-limited operating mode, the detection module is further configured to:

[0023] Send a constant voltage operating mode request to the GCU to enable the GCU to enter constant voltage operating mode;

[0024] When the GCU is determined to be in the constant voltage operating mode, the expected voltage information returned by the GCU based on the battery limiting threshold condition sent by the BMS is received.

[0025] In one possible embodiment, the determination module is further configured to:

[0026] If it is determined that the first operating state of the power battery is that the charging and discharging current is not limited, then the VCU is kept in normal operating mode, and a constant current operating mode request is sent to the GCU so that the GCU can enter constant current operating mode.

[0027] Thirdly, an electronic device is proposed, comprising a processor and a memory, wherein the memory stores program code that, when executed by the processor, causes the processor to perform the steps of the VCU operating mode switching method described in the first aspect.

[0028] Fourthly, a computer-readable storage medium is provided, comprising program code that, when executed on an electronic device, causes the electronic device to perform the steps of the VCU operating mode switching method described in the first aspect.

[0029] Fifthly, a computer program product is provided, which, when invoked by a computer, causes the computer to execute the VCU working mode switching method steps as described in the first aspect.

[0030] The beneficial effects of this application are as follows:

[0031] In the VCU operating mode switching method provided in this application embodiment, when it is determined that the drive motor is in a powered-on state, it enters a normal operating mode and queries the first operating state of the power battery through the BMS according to a preset battery state query cycle; then, when it is determined that the first operating state is limited charging and discharging current, the normal operating mode of the VCU is switched to the battery limited operating mode based on the battery limited information returned by the BMS; finally, if the VCU is in the battery limited operating mode and the BMS detects that the second operating state of the power battery is not limited charging and discharging current, the battery limited operating mode of the VCU is switched back to the normal operating mode based on the battery unlimited information returned by the BMS.

[0032] In this way, the operating mode of the VCU is switched based on the operating state of the power battery, so as to ensure that the VCU of the range-extended vehicle can maintain the normal operation of the range-extended vehicle under various operating conditions of the power battery.

[0033] Furthermore, other features and advantages of this application will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0035] Figure 1 An exemplary schematic diagram of a range-extended vehicle to which an embodiment of this application applies is shown;

[0036] Figure 2 An exemplary diagram illustrates a CAN network structure for a range-extended vehicle provided in an embodiment of this application;

[0037] Figure 3 An exemplary flowchart of a VCU working mode switching method provided in an embodiment of this application is shown.

[0038] Figure 4 An exemplary diagram illustrates a specific application scenario for identifying the first working state provided in an embodiment of this application;

[0039] Figure 5 An exemplary diagram illustrates the logic judgment of a VCU working mode switching method provided in an embodiment of this application;

[0040] Figure 6 An exemplary embodiment of this application provides a method based on... Figure 3 Schematic diagram of specific application scenarios;

[0041] Figure 7 An exemplary schematic diagram of a VCU operating mode switching device provided in an embodiment of this application is shown;

[0042] Figure 8 An exemplary schematic diagram of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some embodiments of the technical solutions of this application, and not all embodiments. Based on the embodiments recorded in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the technical solutions of this application.

[0044] It should be noted that in the description of this application, "multiple" is understood as "at least two". "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. A connected to B can represent: A and B directly connected, or A and B connected through C. Furthermore, in the description of this application, terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order.

[0045] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0046] (1) VCU: As the central control unit of a new energy vehicle, it is the core of the entire control system. It can collect motor and battery status, accelerator pedal signals, brake pedal signals, actuator and sensor signals, etc. After comprehensively analyzing the driver's intentions and making corresponding judgments, it monitors the actions of the lower-level component controllers. It is responsible for the normal driving of the vehicle, braking energy feedback, energy management of the vehicle drive system and power battery, network management, fault diagnosis and handling, vehicle status monitoring, etc., thereby ensuring that the vehicle works normally and stably with good power performance, high economy and reliability. In short, it can be said that the performance of the VCU directly determines the performance of the new energy vehicle and plays a pivotal role.

[0047] (2) Battery Management System (BMS): It is the "battery steward" of new energy vehicles. It can monitor the battery status in real time, manage the on-board power battery, enhance battery efficiency, prevent overcharging and over-discharging of the battery, and improve the battery life.

[0048] (3) Generator Control Unit (GCU): Also known as generator controller, it can control the generator according to the instructions or signals of VCU, etc., so as to realize the charging function.

[0049] (4) Motor Control Unit (MCU): Also known as motor controller, it is the control center of the entire power system and can control the motor according to the instructions or signals of VCU, etc.

[0050] The design concept of the embodiments of this application is briefly introduced below:

[0051] Currently, under conditions where the charging and discharging current of the power battery is limited, such as low-temperature conditions, the energy management strategies of range-extended vehicles can prevent overcharging or over-discharging of the power battery. However, these strategies do not address how the range-extended vehicle (VCU) transitions from a normal operating mode to a battery-limited operating mode, nor do they address how the VCU returns from the battery-limited operating mode to a normal operating mode.

[0052] In view of this, in order to ensure that the VCU of a range-extended vehicle can maintain the normal operation of the vehicle under various operating conditions of the power battery, this application proposes a VCU operating mode switching method, which specifically includes: when it is determined that the drive motor is powered on, entering the normal operating mode, and querying the first operating state of the power battery through the BMS according to a preset battery state query cycle; then, when it is determined that the first operating state is limited charging and discharging current, based on the battery limitation information returned by the BMS, switching the normal operating mode of the VCU to the battery-limited operating mode; finally, if the VCU is in the battery-limited operating mode, and the BMS detects that the second operating state of the power battery is not limited charging and discharging current, then based on the battery not limited information returned by the BMS, switching the battery-limited operating mode of the VCU back to the normal operating mode.

[0053] In particular, the preferred embodiments of this application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments of this application and the features in the embodiments can be combined with each other without conflict.

[0054] See Figure 2 The diagram shown illustrates a CAN network structure for a range-extended vehicle according to an embodiment of this application. The network structure includes: VCU201, BMS202, GCU203, CAN_H204, and CAN_L205. VCU201, BMS202, and GCU203 are all connected via CAN_H204 and CAN_L205. A brief description of the above devices and their functions follows:

[0055] VCU201 is used to send signals such as "request operating mode" and "demand power generation" to GCU203 via CAN_H204 and CAN_L205.

[0056] BMS202 is used to send signals such as "charge and discharge current limit indicator", "allowable charging current limit", "allowable discharging current limit", "high voltage bus voltage" and "power battery voltage" to VCU201 and GCU202 via CAN_H204 and CAN_L205.

[0057] GCU203 is used to send signals such as "operating mode", "generating voltage", and "generating current" to VCU201 via CAN_H204 and CAN_L205.

[0058] It should be noted that the CAN network structure may also include modules such as MCU and DC-DC converter.

[0059] The following description, in conjunction with the above-described CAN network structure diagram and with reference to the accompanying drawings, illustrates the VCU working mode switching method provided by an exemplary embodiment of this application. It should be noted that the above-described application scenario diagram is only shown to facilitate understanding of the spirit and principles of this application, and the implementation of this application is not limited in any way in this respect.

[0060] See Figure 3 The diagram shown is an implementation flowchart of a VCU working mode switching method provided in this application embodiment. Taking the VCU as an example, the specific implementation flow of this method is as follows:

[0061] S301: When the drive motor is determined to be powered on, enter the normal operation mode and query the first working state of the power battery through the BMS according to the preset battery status query cycle.

[0062] Specifically, during step S301, when the VCU determines that the drive motor is powered on (i.e., the vehicle is powered on), the VCU enters normal operating mode. It should be noted that once the VCU determines that the drive motor is powered on, the VCU can default to normal operating mode. Furthermore, during this process, the VCU sends a constant current operating mode request to the GCU to enable the GCU to enter constant current operating mode. Further, when it is determined that the GCU is in constant current operating mode, the VCU receives the expected current information returned by the GCU based on the required power generation carried in the constant current operating mode request.

[0063] For example, taking the expected current information as the generation current, when the drive motor is powered on, the VCU can enter the normal working mode by default. That is, the VCU sends a "request working mode signal = constant current working mode" request to the GCU. After receiving the constant current working mode request, the GCU enters the constant current working mode. Further, after receiving the "demand generation power" signal sent by the VCU and the "high voltage bus voltage" sent by the BMS, the GCU calculates the "generation current" corresponding to the "demand generation power" internally, performs current closed-loop control, and sends the "generation current" signal to the VCU.

[0064] Next, after the VCU enters normal working mode, it can query the first working state of the power battery through the BMS according to the preset battery status query cycle (e.g., 5 seconds); and each first working state queried can be used to update the first working state queried last time.

[0065] S302: When the first operating state is determined to be charge / discharge current limited, the normal operating mode of the VCU is switched to the battery limited operating mode based on the battery limited information returned by the BMS.

[0066] Specifically, during step S302, the first working state queried is analyzed and detected in real time. When it is determined that the first working state is limited charge and discharge current, the normal working mode of the VCU is switched to the battery limited working mode based on the battery limited information returned by the BMS.

[0067] For example, see Figure 4 As shown, after obtaining the first working state, the VCU can parse the state information contained in the first working state to obtain at least one working characteristic attribute (e.g., four working characteristic attributes) of the power battery. Then, based on the obtained at least one working characteristic attribute and the preset characteristic attribute range, when it is determined that the characteristic attribute range to which the at least one working characteristic attribute belongs satisfies the preset charge and discharge current limiting condition, the first working state is determined to be charge and discharge current limited.

[0068] Furthermore, after determining that the first operating state is limited charge and discharge current, the normal operating mode of the VCU can be switched to the battery-limited operating mode based on the battery limitation information returned by the BMS.

[0069] For example, when the VCU determines that the first operating state is limited charge and discharge current, or when the BMS detects that the charge and discharge current of the power battery is in a limited state, the BMS can send battery limited information carrying the "charge and discharge current limited identifier = limited" signal to the VCU. After receiving the battery limited information, the VCU switches its normal operating mode to the battery limited operating mode.

[0070] Optionally, if at least one of the obtained operating characteristic attributes belongs to a characteristic attribute interval that satisfies the preset charging and discharging current limiting condition, then the first operating state can be determined as charging and discharging current unlimited, thereby keeping the VCU in normal operating mode and sending a constant current operating mode request to the GCU so that the GCU enters constant current operating mode.

[0071] For example, when the VCU determines that the first operating state is that the charging and discharging current is not limited, or when the BMS detects that the charging and discharging current of the power battery is in an unlimited state, the BMS can send the battery unlimited information carrying the "charging and discharging current limited identifier = unlimited" signal to the VCU. Thus, after receiving the battery limited information, the VCU maintains the normal operating mode. Furthermore, it sends a "request operating mode signal = constant current operating mode" request to the GCU. After receiving the constant current operating mode request, the GCU enters the constant current operating mode. Further, after receiving the "demand power generation" signal sent by the VCU and the "high voltage bus voltage" sent by the BMS, the GCU calculates the "power generation current" corresponding to the "demand power generation" internally, performs current closed-loop control, and sends the "power generation current" signal to the VCU.

[0072] S303: If the VCU is in the battery-limited operating mode, and the BMS detects that the second operating state of the power battery is that the charging and discharging current is not limited, then based on the battery-unlimited information returned by the BMS, the battery-limited operating mode of the VCU is switched to the normal operating mode.

[0073] Specifically, when executing step S303, while the VCU is in the battery-limited operating mode, it can still query the second operating state of the power battery through the BMS according to the preset battery status query cycle. If the second operating state of the power battery is detected as unlimited charging and discharging current, the VCU will switch from the battery-limited operating mode to the normal operating mode based on the battery unlimited information returned by the BMS.

[0074] In one possible implementation, while the VCU is in a battery-limited operating mode, it sends a constant-voltage operating mode request to the GCU to enable the GCU to enter the constant-voltage operating mode. Further, when it is determined that the GCU is in the constant-voltage operating mode, it receives the expected voltage information returned by the GCU based on the battery-limited threshold condition sent by the BMS.

[0075] For example, taking the expected voltage information as the generation voltage, when the VCU is in the battery-limited operating mode, that is, after the BMS detects that the charging and discharging current of the power battery is in an unlimited state and switches the normal operating mode of the VCU to the battery-limited operating mode, it sends a "request operating mode signal = constant voltage operating mode" request to the GCU. After receiving the constant voltage operating mode request, the GCU enters the constant voltage operating mode. Further, after receiving the "allowable charging current limit", "allowable discharging current limit" and "power battery voltage" signals sent by the BMS, that is, the battery-limited threshold conditions, the GCU uses the "power battery voltage" as the target value of the "generation voltage" for voltage closed-loop control and sends the "generation voltage" signal to the VCU.

[0076] See Figure 5 The diagram shown illustrates the logic judgment of a VCU working mode switching method provided in this application embodiment. The specific steps of the method are as follows:

[0077] S501: Confirm vehicle is powered on.

[0078] For example, the VCU can determine that the vehicle is powered on by the drive motor being powered on.

[0079] S502: Enter normal working mode.

[0080] Specifically, once the vehicle is powered on, the VCU can be set to enter normal operating mode by default.

[0081] S503: Is the charging and discharging of the power battery restricted? If no, proceed to S504; if yes, proceed to S505.

[0082] It should be noted that in the process of determining whether the charging and discharging of the power battery is limited, if the charging and discharging of the power battery is limited, the VCU will switch the normal operating mode to the battery-limited operating mode; if the charging and discharging of the power battery is not limited, the VCU will maintain the normal operating mode.

[0083] S504: Sends a "request for operating mode signal = constant current operating mode" to the GCU to enable the GCU to enter constant current operating mode, and calculates the generating current based on the required generating power and performs closed-loop control.

[0084] S505: Sends a "request for operating mode signal = constant voltage operating mode" to the GCU to enable the GCU to enter constant voltage operating mode and perform closed-loop control based on the power battery voltage.

[0085] S506: Determine if the vehicle is powered off. If yes, end the VCU operating mode switching; otherwise, proceed to S503 to determine again whether operating mode switching is required.

[0086] Based on the above VCU working mode switching method, please refer to... Figure 6 The diagram illustrates a specific application scenario of a VCU working mode switching method provided in this application embodiment. When the VCU determines that the drive motor is powered on, it enters the normal working mode Nor.Oper.Mode and queries the first working state of the power battery Fir.Work.State through the BMS according to a preset battery state query cycle (e.g., 10 seconds). Then, when it is determined that the first working state Fir.Work.State is limited in charge and discharge current, based on the battery limiting information Bat.Rest.Inf returned by the BMS, the VCU's normal working mode Nor.Oper.Mode is switched to the battery limiting working mode Bat.Rest. . Oper.Mode; Further, if the VCU is in the battery-limited operating mode Bat.Rest.Oper.Mode, and the BMS detects that the second operating state of the power battery, Sec.Work.State, is that the charging and discharging current is not limited, then based on the battery unlimited information Bat.UnRest.Inf returned by the BMS, the battery-limited operating mode Bat.Rest.Oper.Mode of the VCU is switched to the normal operating mode Nor.Oper.Mode.

[0087] In summary, in the VCU operating mode switching method provided in this application embodiment, when it is determined that the drive motor is powered on, the system enters the normal operating mode and queries the first operating state of the power battery through the BMS according to a preset battery status query cycle. Then, when it is determined that the first operating state is limited charging and discharging current, the VCU's normal operating mode is switched to the battery-limited operating mode based on the battery limitation information returned by the BMS. Finally, if the VCU is in the battery-limited operating mode and the BMS detects that the second operating state of the power battery is not limited charging and discharging current, the VCU's battery-limited operating mode is switched back to the normal operating mode based on the battery unlimited information returned by the BMS.

[0088] In this way, the operating mode of the VCU is switched based on the operating state of the power battery, so as to ensure that the VCU of the range-extended vehicle can maintain the normal operation of the range-extended vehicle under various operating conditions of the power battery.

[0089] Furthermore, based on the same technical concept, this application embodiment also provides a VCU operating mode switching device, applied to a range-extended vehicle, which can implement the above-described method flow of this application embodiment. For example... Figure 7 As shown, the VCU operating mode switching device includes: a query module 701, a determination module 702, and a detection module 703, wherein:

[0090] The query module 701 is used to determine when the drive motor is powered on, enter the normal working mode, and query the first working state of the power battery through the battery management system (BMS) according to the preset battery status query cycle.

[0091] The determination module 702 is used to switch the normal working mode of the VCU to the battery-limited working mode based on the battery limitation information returned by the BMS when the first working state is determined to be limited charging and discharging current.

[0092] The detection module 703 is used to switch the VCU's battery-limited operating mode to normal operating mode if the power battery's second operating state is detected by the BMS as unlimited charging and discharging current during the process of the VCU being in the battery-limited operating mode.

[0093] In one possible embodiment, when it is determined that the drive motor is powered on and the system enters a normal operating mode, the query module 701 is specifically used for:

[0094] When it is determined that the drive motor is powered on, a constant current operating mode request is sent to the generator controller (GCU) to enable the GCU to enter constant current operating mode.

[0095] When it is determined that the GCU is in constant current operating mode, the expected current information returned by the GCU is received based on the required power generation carried by the constant current operating mode request.

[0096] In one possible embodiment, when the first operating state is determined to be a charge / discharge current limited state, the determination module 702 is specifically used for:

[0097] The state information contained in the first working state is parsed to obtain at least one working characteristic attribute of the power battery;

[0098] When at least one working characteristic attribute is determined, and the characteristic attribute interval to which each belongs satisfies the preset charge / discharge current limiting condition, the first working state is determined to be charge / discharge current limited.

[0099] In one possible embodiment, while the VCU is in a battery-limited operating mode, the detection module 703 is further configured to:

[0100] Send a constant voltage operating mode request to the GCU to enable the GCU to enter constant voltage operating mode;

[0101] When the GCU is determined to be in the constant voltage operating mode, the expected voltage information returned by the GCU based on the battery limiting threshold condition sent by the BMS is received.

[0102] In one possible embodiment, the determination module 702 is further configured to:

[0103] If it is determined that the first operating state of the power battery is that the charging and discharging current is not limited, then the VCU is kept in normal operating mode, and a constant current operating mode request is sent to the GCU so that the GCU can enter constant current operating mode.

[0104] Based on the same technical concept, embodiments of this application also provide an electronic device that can implement the VCU working mode switching method flow provided in the above embodiments of this application. In one embodiment, the electronic device can be a server, a terminal device, or other electronic devices. Figure 8 As shown, the electronic device may include:

[0105] At least one processor 801 and a memory 802 connected to at least one processor 801. In this embodiment, the specific connection medium between the processor 801 and the memory 802 is not limited. Figure 8 The example shown is the connection between processor 801 and memory 802 via bus 800. Bus 800 is... Figure 8 The connections between other components are indicated by thick lines and are for illustrative purposes only, not as limiting information. The 800 bus can be divided into address bus, data bus, control bus, etc., for ease of representation. Figure 8 The term is represented by a single thick line, but this does not imply that there is only one bus or one type of bus. Alternatively, the processor 801 can also be called a controller; there is no restriction on the name.

[0106] In this embodiment, memory 802 stores instructions executable by at least one processor 801. By executing the instructions stored in memory 802, at least one processor 801 can execute a VCU operating mode switching method described above. Processor 801 can implement... Figure 7 The functions of each module in the device shown.

[0107] The processor 801 is the control center of the device. It can connect to various parts of the control device through various interfaces and lines. By running or executing instructions stored in memory 802 and calling data stored in memory 802, the processor can perform various functions and process data, thereby monitoring the device as a whole.

[0108] In one possible design, processor 801 may include one or more processing units. Processor 801 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may also not be integrated into processor 801. In some embodiments, processor 801 and memory 802 may be implemented on the same chip; in some embodiments, they may also be implemented on separate chips.

[0109] The processor 801 can be a general-purpose processor, such as a CPU, digital signal processor, application-specific integrated circuit, field-programmable gate array or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the VCU operating mode switching method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0110] Memory 802, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. Memory 802 may include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card-type memory, random access memory (RAM), static random access memory (SRAM), programmable read-only memory (PROM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic storage, magnetic disk, optical disk, etc. Memory 802 can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer, but is not limited thereto. In the embodiments of this application, memory 802 can also be a circuit or any other device capable of implementing storage functions for storing program instructions and / or data.

[0111] By designing and programming the processor 801, the code corresponding to the VCU working mode switching method described in the foregoing embodiments can be embedded into the chip, thereby enabling the chip to execute the code during operation. Figure 3The illustrated embodiment describes the steps of a VCU operating mode switching method. How to design and program the processor 801 is a technique well-known to those skilled in the art and will not be elaborated upon here.

[0112] Based on the same inventive concept, embodiments of this application also provide a storage medium storing computer instructions that, when executed on a computer, cause the computer to perform a VCU working mode switching method described above.

[0113] In some possible implementations, various aspects of the VCU operating mode switching method provided in this application can also be implemented in the form of a program product, which includes program code. When the program product is run on a device, the program code is used to cause the control device to perform the steps in the VCU operating mode switching method according to various exemplary embodiments of this application described above.

[0114] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0116] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0117] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for switching a working mode of a vehicle control unit (VCU), characterized in that, Applied to range-extended vehicles, including: Once the drive motor is confirmed to be powered on, the system enters normal operating mode, which includes: When it is determined that the drive motor is powered on, a constant current operating mode request is sent to the generator controller GCU so that the GCU enters the constant current operating mode. When it is determined that the GCU is in the constant current working mode, the expected current information returned by the expected power generation carried by the GCU based on the constant current working mode request is received, and the first working state of the power battery is queried through the battery management system (BMS) according to the preset battery state query cycle. When it is determined that the first operating state is limited charge and discharge current, the normal operating mode of the VCU is switched to the battery limited operating mode based on the battery limited information returned by the BMS. During the process of the VCU being in the battery-limited operating mode, the following is also included: Send a constant voltage operating mode request to the GCU to cause the GCU to enter constant voltage operating mode; When it is determined that the GCU is in the constant voltage working mode, the expected voltage information returned by the GCU based on the battery limiting threshold condition sent by the BMS is received. If the VCU is in the battery-limited operating mode, and the BMS detects that the second operating state of the power battery is that the charging and discharging current is not limited, then based on the battery unlimited information returned by the BMS, the battery-limited operating mode of the VCU is switched to the normal operating mode.

2. The method of claim 1, wherein, The determination that the first operating state is a charge / discharge current limited state includes: The state information contained in the first working state is parsed to obtain at least one working characteristic attribute of the power battery; When the at least one working characteristic attribute is determined to belong to a characteristic attribute range that satisfies the preset charge / discharge current limiting condition, the first working state is determined to be charge / discharge current limited.

3. The method of any one of claims 1-2, wherein, The method further includes: If it is determined that the first operating state of the power battery is that the charging and discharging current is not limited, then the VCU is kept in the normal operating mode, and a constant current operating mode request is sent to the GCU so that the GCU enters the constant current operating mode.

4. A working mode switching device of a VCU, characterized in that, Applied to range-extended vehicles, including: The query module is used to determine when the drive motor is powered on and enters the normal operating mode, specifically including: When it is determined that the drive motor is powered on, a constant current operating mode request is sent to the generator controller GCU so that the GCU enters the constant current operating mode. When it is determined that the GCU is in the constant current working mode, the expected current information returned by the expected power generation carried by the GCU based on the constant current working mode request is received, and the first working state of the power battery is queried through the battery management system (BMS) according to the preset battery state query cycle. The determination module is used to switch the normal working mode of the VCU to the battery-limited working mode based on the battery limitation information returned by the BMS when it is determined that the first working state is a charge / discharge current limited state. During the process of the VCU being in the battery-limited operating mode, the following is also included: Send a constant voltage operating mode request to the GCU to cause the GCU to enter constant voltage operating mode; When it is determined that the GCU is in the constant voltage working mode, the expected voltage information returned by the GCU based on the battery limiting threshold condition sent by the BMS is received. The detection module is used to switch the VCU from the battery-limited operating mode to the normal operating mode if the VCU is in the battery-limited operating mode and the BMS detects that the second operating state of the power battery is that the charging and discharging current is not limited.

5. The apparatus of claim 4, wherein, When the first operating state is determined to be a charge / discharge current limited state, the determination module is specifically used for: The state information contained in the first working state is parsed to obtain at least one working characteristic attribute of the power battery; When the at least one working characteristic attribute is determined to belong to a characteristic attribute range that satisfies the preset charge / discharge current limiting condition, the first working state is determined to be charge / discharge current limited.

6. The apparatus of any one of claims 4-5, wherein, The determination module is also used for: If it is determined that the first operating state of the power battery is that the charging and discharging current is not limited, then the VCU is kept in the normal operating mode, and a constant current operating mode request is sent to the GCU so that the GCU enters the constant current operating mode.

7. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1-3.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1-3.

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