Electric vehicle control method and electric vehicle

Abstract

The invention discloses an electric vehicle control method and an electric vehicle, the electric vehicle control method is applied to an electric vehicle control system, and the electric vehicle control system comprises a front end control unit, a rear end control unit and a data communication protocol wire harness; the front-end control unit and the rear-end control unit are connected through a data communication wire harness; the data communication protocol wire harness is a 485 bus communication protocol wire harness; the electric vehicle control method comprises the steps that vehicle running states are polled through a data communication protocol wire harness in a preset period, and the vehicle running states comprise the ignition state and the flameout state; determining an electric vehicle running mode according to the vehicle running state. The front-end control unit and the rear-end control unit are connected through the data communication protocol wiring harness, so that the wiring difficulty is reduced, interference is reduced, the fault rate is reduced, the electric vehicle control system is used for obtaining the vehicle running state and determining the vehicle running mode, and accurate control over an electric vehicle is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and particularly to an electric vehicle control method and an electric vehicle. Background Art

[0002] For the whole vehicle communication of traditional electric vehicles, analog signal communication cables are now used for the whole vehicle system communication. Traditional electric vehicles use point-to-point wiring, with many cross nodes, complex production processes, and signals are prone to interference with each other, which easily causes incorrect triggering of lights, motor jitter, high failure rates, and high standby power consumption. Summary of the Invention

[0003] The present invention provides an electric vehicle control method and an electric vehicle to reduce the wiring difficulty, reduce interference, reduce the failure rate, and ensure the control accuracy.

[0004] According to one aspect of the present invention, an electric vehicle control method is provided, which is applied to an electric vehicle control system. The electric vehicle control system includes: a front-end control unit, a rear-end control unit, and a data communication protocol wire harness;

[0005] The front-end control unit and the rear-end control unit are connected through a data communication wire harness; the data communication protocol wire harness is a 485 bus communication protocol wire harness;

[0006] The electric vehicle control method includes:

[0007] Poll the vehicle operating state through the data communication protocol wire harness at a preset period. The vehicle operating state includes an ignition state and a flameout state;

[0008] Determine the electric vehicle operation mode according to the vehicle operating state.

[0009] Optionally, determining the electric vehicle operation mode according to the vehicle operating state includes:

[0010] When the vehicle operating state is in the ignition state, the electric vehicle operation mode is in the full power operation mode.

[0011] Optionally, determining the electric vehicle operation mode according to the vehicle operating state includes:

[0012] When the vehicle operating state is in the flameout state, obtain the vehicle sleep mode within a preset time. The vehicle sleep mode includes a first battery sleep mode and a second battery sleep mode. The standby power consumption of the vehicle in the first battery sleep mode is greater than that in the second battery sleep mode;

[0013] Determine the electric vehicle operation mode according to the vehicle sleep mode.

[0014] Optionally, the preset time includes a first preset time and a second preset time, and the first preset time is less than the second preset time;

[0015] Obtaining the vehicle sleep mode within the preset time includes:

[0016] Whether vehicle operation information is obtained within the first preset time;

[0017] If vehicle operation information is obtained within the first preset time, the electric vehicle operation mode is in the full power operation mode;

[0018] If vehicle operation information is not obtained within the first preset time, the electric vehicle enters the first battery sleep mode.

[0019] Optionally, after it is considered that the electric vehicle enters the first battery sleep mode, it further includes:

[0020] Whether vehicle operation information is obtained within the second preset time;

[0021] If vehicle operation information is not obtained within the second preset time, the electric vehicle enters the second battery sleep mode;

[0022] If vehicle operation information is obtained within the second preset time, obtain the battery SOC value and the first preset SOC value;

[0023] If the battery SOC value is greater than or equal to the first preset SOC value, wake up the vehicle, and the electric vehicle operation mode is in the full power operation mode;

[0024] If the battery SOC value is less than the first preset SOC value, the electric vehicle enters the second battery sleep mode.

[0025] Optionally, after the electric vehicle enters the second battery sleep mode, it further includes:

[0026] The electric vehicle stops the second battery sleep mode;

[0027] Obtain the current battery SOC value, the second preset SOC value, and the third preset SOC value, the second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value;

[0028] If the current battery SOC value is greater than or equal to the second preset SOC value, the electric vehicle operation mode is in the full power operation mode;

[0029] If the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the electric vehicle operation mode is in the first preset power operation mode;

[0030] If the current battery SOC value is less than the third preset SOC value, the operation mode of the electric vehicle is in the second preset power operation mode, where the operation power in the first preset power operation mode is less than the operation power in the full power operation mode, and the operation power in the second preset power operation mode is less than the operation power in the first preset power operation mode.

[0031] Optionally, if the current battery SOC value is greater than or equal to the second preset SOC value, after the operation mode of the electric vehicle is in the full power operation mode, it further includes:

[0032] Obtain the current battery temperature value and the preset temperature value;

[0033] If the current battery temperature value is less than or equal to the preset temperature value, start the heating module at full power and adjust the operation power of the heating module in real time;

[0034] If the current battery temperature value is greater than the preset temperature value, do not start the heating module.

[0035] Optionally, if the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, after the operation mode of the electric vehicle is in the first preset power operation mode, it further includes:

[0036] Obtain the current battery temperature value and the preset temperature value;

[0037] If the current battery temperature value is less than or equal to the preset temperature value, start the heating module at the first preset power;

[0038] If the current battery temperature value is greater than the preset temperature value, do not start the heating module.

[0039] Optionally, if the current battery SOC value is less than the third preset SOC value, after the operation mode of the electric vehicle is in the second preset power operation mode, it further includes:

[0040] Obtain the current battery temperature value and the preset temperature value;

[0041] If the current battery temperature value is less than or equal to the preset temperature value, start the heating module at the second preset power;

[0042] If the current battery temperature value is greater than the preset temperature value, do not start the heating module.

[0043] According to another aspect of the present invention, there is provided an electric vehicle, including the electric vehicle control method according to any one of the first aspects.

[0044] The technical solution of the embodiment of the present invention is through an electric vehicle control method, which is applied to an electric vehicle control system. The electric vehicle control system includes: a front-end control unit, a rear-end control unit, and a data communication protocol wiring harness; the front-end control unit and the rear-end control unit are connected through the data communication wiring harness; the data communication protocol wiring harness is a 485 bus communication protocol wiring harness; the electric vehicle control method includes: polling the vehicle running state through the data communication protocol wiring harness at a preset period, and the vehicle running state includes an ignition state and a flameout state; determining the running mode of the electric vehicle according to the vehicle running state. The data communication protocol wiring harness is used to realize the connection between the front-end control unit and the rear-end control unit, so as to reduce the wiring difficulty, reduce interference, reduce the failure rate, and use the electric vehicle control system to obtain the vehicle running state and determine the vehicle running mode to ensure the precise control of the electric vehicle.

[0045] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0047] Figure 1 It is a flowchart of an electric vehicle control method provided by an embodiment of the present invention;

[0048] Figure 2 It is a schematic structural diagram of an electric vehicle control system provided by an embodiment of the present invention;

[0049] Figure 3 It is a schematic structural diagram of another electric vehicle control system provided by an embodiment of the present invention;

[0050] Figure 4 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0051] Figure 5 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0052] Figure 6 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0053] Figure 7 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0054] Figure 8 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0055] Figure 9 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0056] Figure 10 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention;

[0057] Figure 11 It is a flowchart of another electric vehicle control method provided by an embodiment of the present invention. Detailed implementation manners

[0058] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0060] Figure 1 It is a flowchart of an electric vehicle control method provided by an embodiment of the present invention. This embodiment is applicable to the electric vehicle control situation. This method can be executed by an electric vehicle control system, which can be implemented in the form of hardware and / or software, and the electric vehicle control system can be configured in an electric vehicle. Figure 2 It is a schematic structural diagram of an electric vehicle control system provided by an embodiment of the present invention, Figure 3 It is a schematic structural diagram of another electric vehicle control system provided by an embodiment of the present invention, as Figure 2 and Figure 3As shown in the figure, the electric vehicle control system includes: a front-end control unit 101, a rear-end control unit 102, and a data communication protocol wire harness 103; the front-end control unit 101 and the rear-end control unit 102 are connected through a data communication wire harness; the data communication protocol wire harness 103 is a 485 bus communication protocol wire harness; by using the 485 bus communication protocol wire harness to replace the traditional point-to-point wiring, the number of nodes and the length of the wire harness are reduced, the failure rate is reduced, and the maintenance cost is reduced. The physical layer of the 485 bus communication protocol wire harness adopts a twisted pair shielded wire + magnetic ring filter, and the baud rate is adaptively switched (9.6 kbps - 115.2 kbps). The protocol layer of the 485 bus communication protocol wire harness defines 4 levels of priority flag bits, supporting high-priority instructions to preempt the bus. For example, the brake instruction priority is level 0. The combination of time slice polling and dynamic priority preemption in the 485 bus communication protocol wire harness improves the bus utilization rate to 90%. The electric vehicle control system also includes a communication unit 104, a display unit 105, a battery management unit 106, a charging unit 107, and a digital liquid-cooled motor 108; the communication unit 104, the display unit 105, the battery management unit 106, and the digital liquid-cooled motor 108 are all connected to the data communication protocol wire harness 103, and the charging unit 107 is connected to the rear-end control unit 102 through a K-line communication protocol wire harness to realize independent monitoring of the charging state. The front-end control unit 101 integrates a lighting drive, a handlebar signal processing, a Beidou / GPS positioning, an NFC authentication, and a voltage stabilization module. Specifically, the front-end control unit 101 can process the input signals to realize the digital processing of the throttle, brake, and switch signals. The front-end control unit 101 can also drive external devices to realize the electronic drive of the lighting, lock, and horn control. The front-end control unit 101 can also supply power to the front part of the electric vehicle. For example, it uses a 5V controllable power supply to supply fast charging for mobile phones, a 12V ACC controllable power supply to supply power to the instrument, and a 12V constant power supply to supply power to the intelligent terminal. The front-end control unit 101 can also realize the vehicle entry control through Bluetooth to complete the power on / off and lock / unlock. The front-end control unit 101 also has a positioning function to realize the vehicle trajectory determination and vehicle anti-theft. The front-end control unit 101 can also communicate bidirectionally with the platform data to realize remote vehicle control, remote data upload, and remote OTA. The front-end control unit 101 is also used for storing the basic parameters of the vehicle, and real-time obtaining the operation parameters and operation states. At this time, the operation parameters can include the throttle parameters and the operation parameters of each component. The operation parameters of each component include voltage, current, and temperature, and the operation states include the switch state, the brake state, the ACC state, the Bluetooth working state, the 4G working state, and the positioning working state. The front-end control unit 101 can also set the rear-end control unit 102, the display unit 105, the communication unit 104, and the digital liquid-cooled motor 108 through a 4G or Bluetooth channel. The rear-end control unit 102 includes a taillight control, a battery SOC measurement, a lead-acid battery heating, an electronic saddle lock charging protocol management.Specifically, the backend control unit 102 can process input signals to achieve digital processing of battery temperature and saddle lock position signals. The backend control unit 102 can also drive external devices to achieve electronic drive of lighting, locks, and battery heating control. The backend control unit 102 can also perform power control, such as supplying power to the front part of the vehicle using a 12V controllable power supply. The backend control unit 102 can also control electronic switches to achieve positive or negative control. The backend control unit 102 can also supply power to and control the digital liquid-cooled motor 108, and use signals to trigger the internal power supply circuit of the digital liquid-cooled motor 108 to turn on or off. The backend control unit 102 can also measure the battery SOC and upload the battery status to the front-end control unit 101 in real time to trigger dynamic adjustment of the load balancing algorithm. The backend control unit 102 can also perform low-power management of the electric vehicle. When the vehicle is in the running state, the 12V VCC is powered on, and the display unit 105, digital liquid-cooled motor 108, front-end control unit 101, and backend control unit 102 all work; when the vehicle is in the sentry state, the 12V VCC is turned off, and the display unit 105 and digital liquid-cooled motor 108 are both turned off, while the front-end control unit 101 and backend control unit 102 both work; when the vehicle is in the standby state, the 12V VCC is turned off, and the display unit 105, digital liquid-cooled motor 108, and front-end control unit 101 are all turned off, while the backend control unit 102 works; when the vehicle is in the factory state, the 12V VCC is turned off, and the display unit 105, digital liquid-cooled motor 108, front-end control unit 101, and backend control unit 102 are all turned off. The backend control unit 102 is also used to store the basic parameters of the vehicle and obtain the operating parameters and operating status in real time. At this time, the operating parameters include battery operating parameters and component operating parameters. The battery operating parameters include voltage, current, power, and temperature; the component operating parameters include voltage, current, and temperature. The operating status includes switch status, brake status, ACC status, Bluetooth working status, 4G working status, and positioning working status. The display unit 105 can implement functions such as display, light sensing, brightness control, and multi-screen interaction of TFT display. The display unit 105 can also store the basic parameters of the vehicle and obtain the vehicle operating parameters in real time, such as temperature, current, voltage, and brightness. The digital liquid-cooled motor 108 can drive the motor and the wheel lock motor. The digital liquid-cooled motor 108 can also store the basic parameters of the vehicle and obtain the operating parameters, operating status, and operating mode in real time. At this time, the operating parameters include temperature, busbar current, voltage, speed, phase current, and recoil current; the operating status includes throttle opening, gear status, brake power-off status, and EABS recoil status, and the operating mode includes mild mode, power mode, and mileage mode. As Figure 1 As shown, the electric vehicle control method includes:

[0061] S101, Poll the vehicle operating status through the data communication protocol harness at a preset period. The vehicle operating status includes the ignition status and the engine-off status.

[0062] Among them, the front-end control unit in the electric vehicle control system polls key signals through the 485 bus at a preset period, so as to achieve precise control of the vehicle. The preset period can be selected according to actual design requirements. An exemplary preset period can be 50 ms. The key signals can include the vehicle operating status, battery SOC, ambient temperature, user operation instructions, etc. In addition, when the front-end control unit polls key signals through the 485 bus at a preset period, if the bus communication is interrupted more than 3 times, an emergency path will be triggered to directly supply power to the central control unit through the K line to wake up the central control unit.

[0063] S102, Determine the electric vehicle operation mode according to the vehicle operating status.

[0064] Among them, obtain the current vehicle operating status. The vehicle operating status includes the ignition status and the engine-off status. The electric vehicle operation mode can include the full-power operation mode or the partial-power operation mode.

[0065] In the embodiment of the present invention, under the electric vehicle control system, the vehicle operating status is polled through the data communication protocol harness at a preset period. The vehicle operating status includes the ignition status and the engine-off status; the electric vehicle operation mode is determined according to the vehicle operating status to ensure precise control of the electric vehicle.

[0066] Optionally, Figure 4 is a flowchart of another electric vehicle control method provided by the embodiment of the present invention. As Figure 4 shown, the electric vehicle control method includes:

[0067] S201, Poll the vehicle operating status through the data communication protocol harness at a preset period. The vehicle operating status includes the ignition status and the engine-off status.

[0068] S202, When the vehicle operating status is in the ignition status, the electric vehicle operation mode is in the full-power operation mode.

[0069] Among them, when detecting the vehicle operating status and obtaining that the vehicle operating status is in the ignition status, it is considered that the ignition signal is valid. At this time, the electric vehicle is controlled to operate at full power, that is, the electric vehicle operation mode is in the full-power operation mode to ensure the normal operation of the electric vehicle.

[0070] In the embodiment of the present invention, under the electric vehicle control system, the vehicle operating status is polled through the data communication protocol harness at a preset period. The vehicle operating status includes the ignition status and the engine-off status; when the vehicle operating status is in the ignition status, the electric vehicle operation mode is in the full-power operation mode to ensure precise control of the electric vehicle and ensure the normal operation of the vehicle.

[0071] Optionally, Figure 5 is a flowchart of another electric vehicle control method provided by an embodiment of the present invention. As Figure 5 shown, the electric vehicle control method includes:

[0072] S301, polling the vehicle operating state through a data communication protocol harness at a preset period. The vehicle operating state includes an ignition state and a flameout state.

[0073] S302, when the vehicle operating state is in the flameout state, obtaining the vehicle's overall sleep mode within a preset time. The vehicle's overall sleep mode includes a first battery sleep mode and a second battery sleep mode. The standby power consumption of the vehicle in the first battery sleep mode is greater than that in the second battery sleep mode.

[0074] Among them, when the vehicle's flameout signal is obtained, it is considered that the vehicle operating state is in the flameout state at this time. The preset time is the delay time in the flameout state, which is convenient for recording the user's operations within the delay time, preventing mis-triggering, and ensuring the precise control of the vehicle. The preset time can be selected according to actual design requirements. In the embodiment of the present invention, obtaining the vehicle's overall sleep mode within the preset time means that when the vehicle is in the flameout state, the battery can be managed to make the vehicle enter the overall sleep mode, reducing the standby power consumption of the vehicle. The vehicle's overall sleep mode includes a first battery sleep mode and a second battery sleep mode. The standby power consumption of the vehicle in the first battery sleep mode is greater than that in the second battery sleep mode. Exemplarily, the standby power consumption of the vehicle in the first battery sleep mode is 0.5W, and the standby power consumption of the vehicle in the second battery sleep mode is 0.1W.

[0075] S303, determining the electric vehicle operation mode according to the vehicle's overall sleep mode.

[0076] Among them, when the vehicle is in the overall sleep mode, the vehicle needs to be woken up, and the vehicle operation mode needs to be determined correspondingly according to the overall sleep mode to ensure the precise control of the vehicle.

[0077] In the embodiment of the present invention, under the electric vehicle control system, polling the vehicle operating state through a data communication protocol harness at a preset period. The vehicle operating state includes an ignition state and a flameout state; when the vehicle operating state is in the flameout state, obtaining the vehicle's overall sleep mode within a preset time. The vehicle's overall sleep mode includes a first battery sleep mode and a second battery sleep mode. The standby power consumption of the vehicle in the first battery sleep mode is greater than that in the second battery sleep mode; determining the electric vehicle operation mode according to the vehicle's overall sleep mode to ensure the precise control of the electric vehicle and ensure the normal operation of the vehicle.

[0078] Optionally, Figure 6 is a flowchart of another electric vehicle control method provided by an embodiment of the present invention. AsFigure 6 As shown, the preset time includes a first preset time and a second preset time, and the first preset time is less than the second preset time; the electric vehicle control method includes:

[0079] S401, polling the vehicle operating state through a data communication protocol harness at a preset period, where the vehicle operating state includes an ignition state and a flameout state.

[0080] S402, when the vehicle operating state is in the flameout state, whether vehicle operation information is obtained within the first preset time; if so, execute step S403; if not, execute step S404.

[0081] S403, the electric vehicle operation mode is in the full power operation mode.

[0082] S404, the electric vehicle enters the first battery sleep mode.

[0083] Among them, when the vehicle is in the flameout state, the flameout time needs to be recorded at this time, which can be realized by using a watchdog timer to prevent mis-triggering. The first preset time can be 10s, and the vehicle operation information can include the user's operation on the vehicle. When vehicle operation information is obtained within the first preset time, mis-touching may occur at this time, and the electric vehicle continues to be in the full power operation mode. When vehicle operation information is not obtained within the first preset time, at this time, the electric vehicle does not have mis-triggering, and the electric vehicle enters the first battery sleep mode to reduce the vehicle power consumption.

[0084] In the embodiment of the present invention, under the electric vehicle control system, the vehicle operating state is polled through a data communication protocol harness at a preset period, and the vehicle operating state includes an ignition state and a flameout state; when the vehicle operating state is in the flameout state, whether vehicle operation information is obtained within the first preset time, correspondingly enabling the electric vehicle operation mode to be in the full power operation mode or the electric vehicle to enter the first battery sleep mode, realizing precise control of the electric vehicle and ensuring the normal operation of the vehicle.

[0085] Optionally, Figure 7 is a flowchart of another electric vehicle control method provided by the embodiment of the present invention. As Figure 7 shown, the electric vehicle control method includes:

[0086] S501, polling the vehicle operating state through a data communication protocol harness at a preset period, where the vehicle operating state includes an ignition state and a flameout state.

[0087] S502, when the vehicle operating state is in the flameout state, whether vehicle operation information is obtained within the first preset time; if so, execute step S503; if not, execute step S504.

[0088] S503. The electric vehicle operation mode is in the full-power operation mode.

[0089] S504. The electric vehicle enters the first battery sleep mode.

[0090] S505. Whether vehicle operation information is obtained within the second preset time; if so, execute step S506; if not, execute step S507.

[0091] S506. The electric vehicle enters the second battery sleep mode.

[0092] Among them, after the electric vehicle enters the first sleep mode, the time of entering the first sleep mode is recorded. The crystal oscillator can be used to maintain the time recording accuracy. The second preset time can be 30 minutes. If vehicle operation information is obtained within the second preset time, it is considered that the user has an operation behavior on the vehicle, and the whole vehicle sleep mode is stopped. If vehicle operation information is not obtained within the second preset time, it is considered that the vehicle can enter the second battery sleep mode to further save the standby power consumption of the vehicle.

[0093] S507. Obtain the battery SOC value and the first preset SOC value.

[0094] S508. Determine whether the battery SOC value is greater than or equal to the first preset SOC value; if so, execute step S509; if not, execute step S506.

[0095] S509. Wake up the vehicle. The electric vehicle operation mode is in the full-power operation mode.

[0096] Among them, after obtaining the vehicle operation information within the second preset period, it is necessary to obtain the current vehicle SOC value. The first preset SOC value can be set according to the actual design requirements. The first preset SOC value can be 20%. When the battery SOC value is greater than or equal to the first preset SOC value, the vehicle can be woken up by the Hall sensor, and the electric vehicle starts and enters the full-power operation mode. When the battery SOC value is less than the first preset SOC value, it can be considered that the current battery power is low, and the electric vehicle continues to be in the second battery sleep mode.

[0097] In an embodiment of the present invention, under the electric vehicle control system, the vehicle operating state is polled through a data communication protocol harness at a preset period. The vehicle operating state includes the ignition state and the flameout state. When the vehicle operating state is in the flameout state, whether vehicle operation information is obtained within a first preset time, correspondingly, the electric vehicle operation mode is in the full power operation mode or the electric vehicle enters the first battery sleep mode. Whether vehicle operation information is obtained within a second preset time, correspondingly, the battery SOC value and the first preset SOC value are obtained, and correspondingly, the electric vehicle continues to maintain the second battery sleep mode or wakes up the vehicle, and the electric vehicle operation mode is in the full power operation mode, realizing precise control of the electric vehicle and ensuring the normal operation of the vehicle.

[0098] Optionally, Figure 8 is a flowchart of another electric vehicle control method provided by an embodiment of the present invention. As Figure 8 shown, after the electric vehicle enters the second battery sleep mode, the electric vehicle control method further includes:

[0099] S601, the electric vehicle stops the second battery sleep mode.

[0100] S602, obtain the current battery SOC value, the second preset SOC value, and the third preset SOC value. The second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value.

[0101] Among them, after the electric vehicle enters the second battery sleep mode, obtain the current battery SOC, as well as obtain the second preset SOC value and the third preset SOC value. The second preset SOC value and the third preset SOC value can be set according to actual design requirements. Exemplarily, the second preset SOC value can be 30%, and the third preset SOC value can be 80%. Dynamically allocate the power supply ratio based on the battery SOC value to ensure the normal operation of the vehicle.

[0102] S603, if the current battery SOC value is greater than or equal to the second preset SOC value, the electric vehicle operation mode is in the full power operation mode.

[0103] Among them, when the current battery SOC value is greater than or equal to the second preset SOC value, at this time, it is considered that the battery of the vehicle is fully charged, and the electric vehicle operation mode is in the full power operation mode.

[0104] S604, if the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the electric vehicle operation mode is in the first preset power operation mode.

[0105] Among them, when the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, at this time, the power supply can be allocated proportionally through a power distribution matrix, and the electric vehicle operation mode is in the first preset power operation mode.

[0106] S605. When the current battery SOC value is less than the third preset SOC value, the operation mode of the electric vehicle is in the second preset power operation mode. Among them, the operation power in the first preset power operation mode is less than the operation power in the full power operation mode, and the operation power in the second preset power operation mode is less than the operation power in the first preset power operation mode.

[0107] Among them, when the current battery SOC value is less than the third preset SOC value, the battery power is low at this time, and the vehicle operation mode needs to be in the second preset power operation mode. The second preset power operation mode is an energy-saving mode. At this time, non-emergency loads are disabled, such as the saddle lock, to save the power of the electric vehicle.

[0108] In the embodiment of the present invention, by obtaining the current battery SOC value, the second preset SOC value, and the third preset SOC value, the second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value. According to the current battery SOC value, the second preset SOC value, and the third preset SOC value, the operation mode of the electric vehicle is correspondingly adjusted to be in the full power operation mode, the first preset power operation mode, or the second preset power operation mode, so as to realize the precise control of the electric vehicle and ensure the normal operation of the vehicle.

[0109] Figure 9 It is a flowchart of another electric vehicle control method provided by the embodiment of the present invention. As Figure 9 shown, after the electric vehicle enters the second battery sleep mode, the electric vehicle control method includes:

[0110] S701. The electric vehicle stops the second battery sleep mode.

[0111] S702. Obtain the current battery SOC value, the second preset SOC value, and the third preset SOC value. The second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value.

[0112] S703. If the current battery SOC value is greater than or equal to the second preset SOC value, the operation mode of the electric vehicle is in the full power operation mode.

[0113] S704. Obtain the current battery temperature value and the preset temperature value.

[0114] Among them, the preset temperature value can be set according to actual design requirements. For example, the preset temperature value can be -20°C. At this time, some hardware structures in the electric vehicle can be designed for low-temperature resistance, such as using TVS tubes, ceramic capacitors, and low-temperature MOS tubes, and ensuring the low-temperature adaptability of the electric vehicle.

[0115] S705, determine whether the current battery temperature value is less than or equal to the preset temperature value. If so, execute step S706; if not, execute step S707.

[0116] S706, start the heating module at full power and adjust the operating power of the heating module in real time.

[0117] S707, do not start the heating module.

[0118] Among them, when the battery SOC value is greater than or equal to the second preset SOC value, when the temperature of the current battery temperature value is less than or equal to the preset temperature value, it is considered that the current battery temperature is low and the heating module needs to be started, and the operating power of the heating module is adjusted in real time, which can be realized by using the PID temperature control algorithm. The heating module may include a heating sheet. When the heating module is started at full power, it can be heated from -20°C to 5°C in 30 minutes. When the current battery temperature value is greater than the preset temperature value, the heating module may not be started to ensure the normal operation of the electric vehicle. The current electric vehicle has good low-temperature adaptability, can operate stably at -40°C, and the battery heating efficiency can be greater than or equal to 85%.

[0119] S708, if the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the electric vehicle operating mode is in the first preset power operating mode.

[0120] S709, if the current battery SOC value is less than the third preset SOC value, the electric vehicle operating mode is in the second preset power operating mode, where the operating power in the first preset power operating mode is less than the operating power in the full power operating mode, and the operating power in the second preset power operating mode is less than the operating power in the first preset power operating mode.

[0121] In the embodiment of the present invention, when the current battery SOC value is greater than or equal to the second preset SOC value, the electric vehicle operating mode is in the full power operating mode; obtain the current battery temperature value and the preset temperature value; when the current battery temperature value is less than or equal to the preset temperature value, start the heating module at full power and adjust the operating power of the heating module in real time, so as to start the heating module at full power when the battery power is sufficient to ensure the normal operation of the electric vehicle.

[0122] Figure 10 As shown in the flowchart of another electric vehicle control method provided by the embodiment of the present invention, after the electric vehicle enters the second battery sleep mode, the electric vehicle control method includes: Figure 10 As shown, after the electric vehicle enters the second battery sleep mode, the electric vehicle control method includes:

[0123] S801, the electric vehicle stops the second battery sleep mode.

[0124] S802. Obtain the current battery SOC value, a second preset SOC value, and a third preset SOC value, where the second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value.

[0125] S803. If the current battery SOC value is greater than or equal to the second preset SOC value, the operation mode of the electric vehicle is in the full power operation mode.

[0126] S804. If the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the operation mode of the electric vehicle is in the first preset power operation mode.

[0127] S805. Obtain the current battery temperature value and the preset temperature value.

[0128] S806. Determine whether the current battery temperature value is less than or equal to the preset temperature value. If so, execute step S807; if not, execute step S808.

[0129] S807. Start the heating module at the first preset power.

[0130] S808. Do not start the heating module.

[0131] Among them, when the operation mode of the electric vehicle is in the first preset power operation mode, when the temperature of the current battery temperature value is less than or equal to the preset temperature value, it is considered that the current battery temperature is relatively low and the heating module needs to be started. However, due to limited battery power, power supply is allocated proportionally, and the heating module is started at the first preset power. At this time, the first preset power can be 80%. When the current battery temperature value is greater than the preset temperature value, the heating module can not be started to ensure the normal operation of the electric vehicle.

[0132] S809. If the current battery SOC value is less than the third preset SOC value, the operation mode of the electric vehicle is in the second preset power operation mode, where the operation power in the first preset power operation mode is less than the operation power in the full power operation mode, and the operation power in the second preset power operation mode is less than the operation power in the first preset power operation mode.

[0133] In the embodiment of the present invention, when the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the operation mode of the electric vehicle is in the first preset power operation mode; obtain the current battery temperature value and the preset temperature value; if the current battery temperature value is less than or equal to the preset temperature value, start the heating module at the first preset power, so as to start the heating module at the first preset power when the battery power is between the second preset SOC value and the third preset SOC value, limit the operation power of the heating module, and ensure the normal operation of the electric vehicle.

[0134] Figure 11The flowchart of another electric vehicle control method provided by an embodiment of the present invention is as follows. Figure 11 As shown, the electric vehicle control method includes:

[0135] S901, the electric vehicle stops the second battery sleep mode.

[0136] S902, obtain the current battery SOC value, the second preset SOC value, and the third preset SOC value, where the second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value.

[0137] S903, if the current battery SOC value is greater than or equal to the second preset SOC value, the electric vehicle operating mode is in the full power operation mode.

[0138] S904, if the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the electric vehicle operating mode is in the first preset power operation mode.

[0139] S905, if the current battery SOC value is less than the third preset SOC value, the electric vehicle operating mode is in the second preset power operation mode, where the operating power in the first preset power operation mode is less than the operating power in the full power operation mode, and the operating power in the second preset power operation mode is less than the operating power in the first preset power operation mode.

[0140] S906, obtain the current battery temperature value and the preset temperature value.

[0141] S907, determine whether the current battery temperature value is less than or equal to the preset temperature value. If so, execute step S908; if not, execute step S909.

[0142] S908, start the heating module with the second preset power.

[0143] S909, do not start the heating module.

[0144] Among them, when the electric vehicle operating mode is in the second preset power operation mode, when the temperature of the current battery temperature value is less than or equal to the preset temperature value, it is considered that the current battery temperature is relatively low and the heating module needs to be started. However, due to limited battery power, through proportional distribution of power supply and dynamic derating strategy, the heating power is limited, and the heating module is started with the second preset power. At this time, the second preset power can be 50%. When the current battery temperature value is greater than the preset temperature value, the heating module can not be started to ensure the normal operation of the electric vehicle.

[0145] In an embodiment of the present invention, when the current battery SOC value is less than the third preset SOC value, the operation mode of the electric vehicle is in the second preset power operation mode; the current battery temperature value and the preset temperature value are obtained; if the current battery temperature value is less than or equal to the preset temperature value, the heating module is started with the second preset power, so as to realize starting the heating module with the first preset power when the battery power is less than the third preset SOC value, limiting the operating power of the heating module, and ensuring the normal operation of the electric vehicle.

[0146] Based on the same inventive concept, an embodiment of the present invention further provides an electric vehicle, which is used to execute the electric vehicle control method provided in any embodiment of the present invention. The electric vehicle can be implemented by software and / or hardware. Therefore, the electric vehicle provided in the embodiment of the present invention includes the technical features of the electric vehicle control method provided in any embodiment of the present invention, and can achieve the beneficial effects of the electric vehicle control method provided in any embodiment of the present invention. The same parts can refer to the description of the electric vehicle control method provided in the embodiment of the present invention above, and will not be repeated here.

[0147] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric vehicle control method, characterized in that, Applied to an electric vehicle control system, the electric vehicle control system includes: a front-end control unit, a rear-end control unit, and a data communication protocol wiring harness; The front-end control unit and the rear-end control unit are connected by a data communication wiring harness; the data communication protocol wiring harness is a 485 bus communication protocol wiring harness; The electric vehicle control method includes: Polling the vehicle operating state through the data communication protocol wiring harness at a preset period, where the vehicle operating state includes an ignition state and a shutdown state; Determine the operating mode of the electric vehicle according to the vehicle operating state.

2. The electric vehicle control method according to claim 1, wherein Determine the operating mode of the electric vehicle according to the vehicle operating state, including: When the vehicle operating state is in the ignition state, the electric vehicle operating mode is in the full-power operating mode.

3. The electric vehicle control method according to claim 1, characterized in that, Determine the operating mode of the electric vehicle according to the vehicle operating state, including: When the vehicle operating state is in the shutdown state, obtain the vehicle sleep mode within a preset time, where the vehicle sleep mode includes a first battery sleep mode and a second battery sleep mode, and the standby power consumption of the vehicle in the first battery sleep mode is greater than that in the second battery sleep mode; Determine the operating mode of the electric vehicle according to the vehicle sleep mode.

4. The electric vehicle control method according to claim 3, wherein The preset time includes a first preset time and a second preset time, and the first preset time is less than the second preset time; Obtain the vehicle sleep mode within a preset time, including: Whether vehicle operation information is obtained within the first preset time; If vehicle operation information is obtained within the first preset time, the electric vehicle operating mode is in the full-power operating mode; If vehicle operation information is not obtained within the first preset time, the electric vehicle enters the first battery sleep mode.

5. The electric vehicle control method according to claim 4, wherein After it is considered that the electric vehicle enters the first battery sleep mode, it further includes: Whether vehicle operation information is obtained within the second preset time; If vehicle operation information is not obtained within the second preset time, the electric vehicle enters the second battery sleep mode; If vehicle operation information is obtained within the second preset time, obtain the battery SOC value and the first preset SOC value; If the battery SOC value is greater than or equal to the first preset SOC value, wake up the vehicle, and the electric vehicle operating mode is in the full-power operating mode; If the battery SOC value is less than the first preset SOC value, the electric vehicle enters the second battery sleep mode.

6. The electric vehicle control method according to claim 5, characterized in that, After the electric vehicle enters the second battery sleep mode, it further includes: The electric vehicle stops the second battery sleep mode; Obtain the current battery SOC value, the second preset SOC value, and the third preset SOC value, where the second preset SOC value is greater than the first preset SOC value, and the third preset SOC value is greater than the second preset SOC value; If the current battery SOC value is greater than or equal to the second preset SOC value, the electric vehicle operating mode is in the full-power operating mode; If the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, the electric vehicle operating mode is in the first preset power operating mode; If the current battery SOC value is less than the third preset SOC value, the operation mode of the electric vehicle is in the second preset power operation mode, where the operation power in the first preset power operation mode is less than the operation power in the full power operation mode, and the operation power in the second preset power operation mode is less than the operation power in the first preset power operation mode.

7. The electric vehicle control method according to claim 6, wherein If the current battery SOC value is greater than or equal to the second preset SOC value, after the operation mode of the electric vehicle is in the full power operation mode, it further includes: Obtain the current battery temperature value and the preset temperature value; If the current battery temperature value is less than or equal to the preset temperature value, start the heating module at full power and adjust the operation power of the heating module in real time; If the current battery temperature value is greater than the preset temperature value, do not start the heating module.

8. The electric vehicle control method according to claim 6, characterized in that, If the current battery SOC value is less than the second preset SOC value and greater than the third preset SOC value, after the operation mode of the electric vehicle is in the first preset power operation mode, it further includes: Obtain the current battery temperature value and the preset temperature value; If the current battery temperature value is less than or equal to the preset temperature value, start the heating module at the first preset power; If the current battery temperature value is greater than the preset temperature value, do not start the heating module.

9. The electric vehicle control method according to claim 6, wherein If the current battery SOC value is less than the third preset SOC value, after the operation mode of the electric vehicle is in the second preset power operation mode, it further includes: Obtain the current battery temperature value and the preset temperature value; If the current battery temperature value is less than or equal to the preset temperature value, start the heating module at the second preset power; If the current battery temperature value is greater than the preset temperature value, do not start the heating module.

10. An electric vehicle, characterized in that, Including the electric vehicle control method according to any one of claims 1-9.

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