Vehicle and vehicle power-on control device and method

Abstract

The invention provides a vehicle and a vehicle power-on control device and method, and belongs to the technical field of vehicle control. The vehicle power-on control method comprises the steps that when the vehicle is in a power-off state and the electric quantity of a low-voltage battery is lower than a preset electric quantity threshold value, power supply to a low-voltage electric device of the vehicle is stopped; the central control system responds to the activation request and drives the low-voltage battery to recover to supply power to the low-voltage electric device of the vehicle; the central control system responds to the starting signal and awakens the whole vehicle control system; the whole vehicle control system detects the state of a brake pedal within preset time, and if it is detected that the treading depth of the brake pedal is larger than the preset depth, a high-voltage power-on instruction is sent to the battery management system; and the battery management system responds to the high-voltage power-on instruction and controls the high-voltage battery to perform high-voltage power-on on the vehicle. According to the vehicle power-on control method, cooperative operation among multiple systems is utilized, so that the power-on process of the vehicle can still be completed even after the vehicle is parked for an ultra-long time.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a vehicle, a vehicle power-on control device and a vehicle power-on control method. Background Art

[0002] As a non-road vehicle, all-terrain vehicles (UTV) are often used in outdoor operations, agricultural transportation, or leisure and entertainment. Due to special usage scenarios, UTV vehicles are used less frequently, and UTV vehicles have the problem of being parked for too long. Some UTV vehicles have not been used for more than half a year in actual use. When a UTV vehicle is powered off and in hibernation, its internal low-voltage battery still needs to provide power to maintain static operation for key systems such as the central control system and the vehicle control system. However, due to the limited capacity of the low-voltage battery, during the long-term parking of the UTV vehicle, the continuous consumption of the dormant current will gradually deplete the low-voltage battery, causing the UTV vehicle to be unable to power on smoothly when it needs to be started again.

[0003] Therefore, it is necessary to provide a vehicle, a vehicle power-on control device and a method to solve the above-mentioned technical problems. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention provides a vehicle, a vehicle power-on control device and a method, which are used to improve the technical problem that the existing UTV vehicle cannot be powered on smoothly again due to the continuous power supply and exhaustion of the low-voltage battery during long-term parking.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a vehicle power-on control method in a first aspect, the vehicle power-on control method comprising: When the vehicle is in a power-off state, the low-voltage battery stops supplying power to the vehicle's low-voltage electrical components when the power level is lower than a preset power threshold; The central control system responds to the activation request and drives the low-voltage battery to resume supplying power to the vehicle's low-voltage electrical devices; The central control system responds to the start signal and wakes up the vehicle control system; The vehicle control system detects the brake pedal status within a preset time. If it detects that the brake pedal is stepped on more deeply than the preset depth, it sends a high-voltage power-on command to the battery management system. The battery management system responds to the high-voltage power-on command and controls the high-voltage battery to power the vehicle at high voltage.

[0006] In one example of the present invention, the central control system responds to an activation request and drives the low-voltage battery to resume supplying power to the vehicle's low-voltage electrical devices, including: the central control system generates an activation signal in response to the activation request, and sends the activation signal to the low-voltage battery through wired communication; wherein the activation signal is a signal generated by pressing a switch button on the central control system; the low-voltage battery responds to the activation signal and resumes supplying power to the vehicle's low-voltage electrical devices.

[0007] In one example of the present invention, the central control system responds to a start signal to wake up the vehicle control system, including: the central control system responds to the start signal and sends a power-on command to the vehicle control system; the start signal is a Bluetooth key signal verified by the central control system, the Bluetooth key signal is sent to the central control system by the Bluetooth key, and the Bluetooth key matches the central control system; the vehicle control system responds to the power-on command and starts from a sleep state.

[0008] In one example of the present invention, the central control system responds to a start signal to wake up the vehicle control system, including: the central control system responds to the start signal and sends a power-on command to the vehicle control system; the start signal is a signal generated by the central control system when it detects that the Bluetooth key signal strength is greater than a preset strength threshold, the Bluetooth key signal is sent by the Bluetooth key, and the Bluetooth key matches the central control system; the vehicle control system responds to the power-on command and starts from a sleep state.

[0009] In one example of the present invention, before the vehicle control system sends a high-voltage power-on command to the battery management system, it also includes a self-inspection step for each subsystem of the vehicle, and the self-inspection step includes: the vehicle control system drives each subsystem in the vehicle to perform a self-inspection to determine whether each subsystem in the vehicle meets the high-voltage power-on conditions; if satisfied, the vehicle control system sends a high-voltage power-on command to the battery management system; if not satisfied, the vehicle control system controls the vehicle to power off, and drives the low-voltage battery to stop supplying power after the vehicle is powered off.

[0010] In one example of the present invention, the battery management system responds to a high-voltage power-on instruction and controls the high-voltage battery to power up the vehicle, including: the battery management system drives the high-voltage battery to pre-charge the high-voltage electrical devices of the vehicle; the high-voltage electrical devices include at least a motor control system; after the pre-charging is completed, the battery management system drives the high-voltage battery to power the high-voltage electrical devices.

[0011] In one example of the present invention, the vehicle power-on control method also includes: the vehicle control system detects the brake pedal status within a preset time, and if it is not detected that the brake pedal is depressed to a depth greater than a preset depth, the vehicle is controlled to power off, and after the vehicle is powered off, the low-voltage battery is driven to stop supplying power.

[0012] In a second aspect, the present invention provides a vehicle power-on control device, the vehicle power-on control device comprising a low-voltage battery, a central control system, a vehicle control system and a battery management system; Among them, the low-voltage battery is used to power the vehicle's low-voltage electrical devices; when the vehicle is in a power-off state, the low-voltage battery stops supplying power when the power level is lower than a preset power threshold; the central control system responds to the activation request to drive the low-voltage battery to resume power supply, and responds to the start signal to wake up the vehicle control system; the vehicle control system detects the brake pedal status within a preset time, and if it is detected that the brake pedal is stepped on with a depth greater than a preset depth, a high-voltage power-on command is sent to the battery management system; the battery management system responds to the high-voltage power-on command and controls the high-voltage battery to power on the vehicle at high voltage.

[0013] In a third aspect, the present invention provides a vehicle, which includes a low-voltage battery, a high-voltage battery, a central control system, a battery management system, a brake sensor, and a vehicle control system; The low-voltage battery is used to supply power to the low-voltage electrical components of the vehicle; when the vehicle is in a power-off state, the low-voltage battery stops supplying power when the power level is lower than a preset power threshold; the high-voltage battery is used to supply power to the high-voltage electrical components of the vehicle; the central control system is electrically connected to the low-voltage battery through wires; the battery management system is used to control the power supply function of the high-voltage battery to the high-voltage electrical components; the brake sensor is used to monitor the state of the brake pedal; the vehicle control system is connected to the central control system, the battery management system and the brake sensor in communication; Among them, the central control system responds to the activation signal to drive the low-voltage battery to resume power supply, and responds to the start signal to wake up the vehicle control system; the vehicle control system detects the brake pedal status by communicating with the brake sensor within a preset time. If it is detected that the brake pedal is stepped on with a depth greater than a preset depth, a high-voltage power-on command is sent to the battery management system; the battery management system responds to the high-voltage power-on command and controls the high-voltage battery to power up the vehicle at high voltage.

[0014] In one example of the present invention, before sending a high-voltage power-on command to the battery management system, the vehicle control system also controls each subsystem in the vehicle to perform a self-check to determine whether each subsystem in the vehicle meets the high-voltage power-on conditions; if so, the vehicle control system sends a high-voltage power-on command to the battery management system; if not, the vehicle control system controls the vehicle to power off.

[0015] The vehicle power-on control method of the present invention enables the low-voltage battery to stop supplying power when the power level is lower than a preset power threshold in the vehicle's power-off dormant state, so as to protect the power level of the low-voltage battery; the central control system can wake up the low-voltage battery and resume power supply by responding to a user activation request after the low-voltage battery stops supplying power through a wired design with the low-voltage battery; after the low-voltage battery is awakened, the vehicle control system detects the state of the brake pedal within a preset time, and confirms the user's actual power-on intention when the brake pedal is stepped on with a depth greater than a preset depth, and sends a high-voltage power-on instruction to the battery management system, thereby avoiding further consumption of the low-voltage battery power due to user misoperation; the battery management system responds to the high-voltage power-on instruction, and drives the high-voltage battery to perform high-voltage power-on for the vehicle, so that the vehicle can be used normally.

[0016] The vehicle power-on control method utilizes the coordinated operation between multiple systems to realize power protection of the low-voltage battery and effective wake-up after power failure during long-term parking of the vehicle, so that the low-voltage battery can maintain a basic power level under long-term static conditions; and through the hierarchical wake-up of the low-voltage battery and the vehicle controller and the high-voltage power-on command triggering mechanism based on the brake pedal status, unnecessary power loss of the low-voltage battery caused by user misoperation is avoided, ensuring that the vehicle can complete the power-on process even after ultra-long-term parking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A flow chart of a vehicle power-on control method according to an embodiment of the present invention; Figure 2 A logic diagram of a vehicle power-on control method in one embodiment of the present invention; Figure 3 This is a flow chart of step S2 in one embodiment of the present invention; Figure 4 This is a flow chart of step S3 in one embodiment of the present invention; Figure 5 is a flow chart of step S3 in another embodiment of the present invention; Figure 6 is a flow chart of step S4 in one embodiment of the present invention; Figure 7 is a flow chart of step S5 in one embodiment of the present invention; Figure 8 A schematic diagram of the structure of a vehicle in one embodiment of the present invention; Fig. 9 FIG. 1 is a schematic diagram of the structure of a vehicle in one embodiment of the present invention.

[0019] Component number description 10. Vehicle; 100. Low-voltage battery; 200. Central control system; 300. Vehicle control system; 400. Battery management system; 500. High-voltage battery; 600. Brake sensor; 20. Bluetooth key; 30. Remote terminal. DETAILED DESCRIPTION

[0020] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0021] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0022] See also Figure 1 and Figure 8 In a first aspect, the present invention provides a vehicle power-on control method, which is applied to a vehicle 10 driven by electric power, and is particularly applicable to various types of pure electric vehicles and hybrid vehicles. For example, the vehicle used in the present invention may be a passenger car, a commercial vehicle, or a special operation vehicle (such as a UTV vehicle).

[0023] The subsystems in the vehicle 10 for executing the vehicle power-on control method include at least a low-voltage battery 100 , a central control system 200 , a vehicle control system 300 , and a battery management system 400 . Among them, during the power-off hibernation process of the vehicle 10, the low-voltage battery 100 stops supplying power to the low-voltage electrical devices of the vehicle 10 when its own power is lower than a preset power threshold, effectively blocking the continuous consumption of the power of the low-voltage battery 100 by the hibernation current, and avoiding the low-voltage battery 100 from being completely exhausted; when the user wants to restart the dormant vehicle 10 again, the central control system 200 can respond to the user's activation request to restore power to the low-voltage battery 100 from the power-off state, so that the vehicle 10 can continue the power-on process; after the low-voltage battery 100 is awakened, the central control system 200 can further wake up the vehicle control system 300, and the vehicle control system 300 detects the state of the brake pedal within a preset time, and confirms the user's actual power-on intention when the brake pedal is stepped on with a depth greater than a preset depth, and sends a high-voltage power-on instruction to the battery management system 400. The battery management system 400 responds to the high-voltage power-on instruction and drives the high-voltage battery 500 to perform high-voltage power-on for the vehicle 10.

[0024] See also Figure 1 and Figure 2 , the vehicle power-on control method comprises the following steps: S1. When the vehicle 10 is in a power-off state, the low-voltage battery 100 stops supplying power to low-voltage electrical components of the vehicle 10 when the power level is lower than a preset power threshold.

[0025] In step S1, when the vehicle 10 is in a power-off state, the high-voltage battery 500 completely stops supplying power to the high-voltage electrical devices in the vehicle 10, and the low-voltage battery 100 still supplies power to the low-voltage electrical devices in the vehicle 10 to maintain the basic functions of the vehicle 10, for example, the low-voltage battery 100 still supplies power to the vehicle control system 300, the central control system 200 and the anti-theft system of the vehicle 10 after the vehicle 10 is powered off. When the power level of the low-voltage battery 100 is lower than the preset power threshold, the low-voltage battery 100 actively stops supplying power to the low-voltage electrical devices of the vehicle 10, effectively blocking the continuous consumption of the power of the low-voltage battery 100 during the parking process of the vehicle 10, and avoiding the low-voltage battery 100 from being completely exhausted, thereby causing the vehicle 10 to be unable to perform the power-on process.

[0026] Next, step S2 is executed, the central control system 200 responds to the activation request, and drives the low-voltage battery 100 to resume supplying power to the low-voltage electrical components of the vehicle 10 .

[0027] In step S2, the touch terminal on the central control system 200 can respond to the activation request generated by the user operation to wake up the low-voltage battery 100 through wired communication in the unpowered state to restore power to the low-voltage electrical components of the vehicle 10, so that the vehicle 10 can perform the subsequent power-on process.

[0028] like Figure 3 As shown, in some embodiments, in step S2, the central control system 200 responds to the activation request and drives the low-voltage battery 100 to resume powering the low-voltage electrical devices of the vehicle 10, including the following steps: S21. The central control system 200 generates an activation signal in response to the activation request, and sends the activation signal to the low-voltage battery 100 through line communication; wherein, the central control system 200 includes a touch terminal having a switch button, and the touch terminal can respond to the activation request of the switch button being effectively pressed after the low-voltage battery 100 is powered off to generate an activation signal. For example, the touch terminal can generate an activation signal after the switch button is pressed for more than a preset trigger time.

[0029] S22 : The low-voltage battery 100 responds to the activation signal and resumes supplying power to the low-voltage electrical components of the vehicle 10 .

[0030] Next, step S3 is executed, the central control system 200 responds to the start signal to wake up the vehicle control system 300. In step S3, the central control system 200 can respond to a variety of start signals to drive the vehicle control system 300 to wake up from the sleep state, so that the vehicle control system 300 coordinates the various subsystems of the vehicle 10 to perform subsequent power-on processes.

[0031] like Figure 4 As shown, in some embodiments, step S3 includes: S31, the central control system 200 responds to the start signal to start from the sleep state and sends a power-on command to the vehicle control system 300; the start signal is a Bluetooth key signal verified by the central control system 200, the Bluetooth key signal is an unlock signal sent when the unlock / lock key of the Bluetooth key 20 is pressed, and the Bluetooth key 20 matches the central control system 200.

[0032] Specifically in one example, the central control system 200 receives a Bluetooth key signal sent by a paired Bluetooth key 20, the central control system 200 verifies the Bluetooth key signal, and confirms that the Bluetooth key signal is a start signal after the Bluetooth key signal verification passes; the central control system 200 responds to the start signal to start from the sleep state, and sends a power-on command to the vehicle control system 300.

[0033] S32: The vehicle control system 300 responds to the power-on command and starts up from the sleep state.

[0034] like Figure 5 As shown, in some other embodiments, step S3 includes: S31', the central control system 200 responds to the start signal and starts from the sleep state, and sends a power-on command to the vehicle control system 300; the start signal is a signal generated by the central control system 200 when it detects that the Bluetooth key signal strength is greater than a preset strength threshold. The Bluetooth key signal is sent by the Bluetooth key 20, and the Bluetooth key 20 matches the central control system 200.

[0035] Specifically in one example, the central control system 200 receives a Bluetooth key signal sent by a paired Bluetooth key 20 and verifies the Bluetooth key signal; the central control system 200 detects the strength of the Bluetooth key signal after the Bluetooth key signal verification is passed, and generates a start signal when the Bluetooth key signal strength is greater than a preset strength threshold; the central control system 200 starts from a sleep state in response to the start signal, and sends a power-on command to the vehicle control system 300.

[0036] S32', the vehicle control system 300 responds to the power-on instruction and starts up from the sleep state.

[0037] In addition, in some other embodiments, step S3 further includes that the central control system 200 receives and responds to the start signal sent by the remote terminal 30 to start from the sleep state and send a start command to the vehicle control system 300. Specifically, the remote terminal 30 sends a start signal to the vehicle 10, the communication system in the vehicle 10 receives the start signal, and sends the start signal to the central control system 200 through line communication (such as the CAN bus of the vehicle 10), and the central control system 200 responds to the start signal to start from the sleep state and send a start command to the vehicle control system 300.

[0038] Next, step S4 is executed, the vehicle control system 300 detects the brake pedal state within a preset time, and if it is detected that the brake pedal is stepped on with a depth greater than a preset depth, a high-voltage power-on command is sent to the battery management system 400 .

[0039] Specifically, in step S4, after being awakened, the vehicle control system 300 communicates with the brake sensor 600 to monitor the brake pedal state within a preset time. If the vehicle control system 300 detects that the brake pedal is stepped on more deeply than the preset depth within the preset time, that is, confirms that the brake pedal is effectively stepped on, a high-voltage power-on instruction is sent to the battery management system 400; if the vehicle control system 300 does not detect that the brake pedal is stepped on more deeply than the preset depth within the preset time, the vehicle 10 is controlled to enter the power-off process, and the low-voltage battery 100 is driven to stop supplying power after the vehicle 10 is powered off.

[0040] In step S4, the vehicle control system 300 identifies the user's real power-on demand based on the brake pedal state. When the vehicle control system 300 detects that the brake pedal is stepped on more than the preset depth within the preset time, it determines that the user has a real power-on demand, and then drives the battery management system 400 to perform the subsequent high-voltage power-on process. This step introduces a verification step of the user's real operation intention by detecting the brake pedal state, effectively distinguishing between the false activation signal (such as accidentally pressing the Bluetooth key 20) and the real power-on demand, avoiding the invalid power loss of the low-voltage battery 100 after awakening due to false operation, and significantly improving the utilization efficiency of the low-voltage battery 100 in low-power scenarios.

[0041] In addition, if Figure 6 As shown, in some embodiments, step S4 also includes a self-checking step of driving each subsystem of the vehicle 10 before the vehicle control system 300 sends a high-voltage power-on instruction to the battery management system 400. The self-checking step includes:

[0042] S41. The vehicle control system 300 drives each subsystem in the vehicle 10 to perform self-check to determine whether each subsystem in the vehicle 10 meets the high-voltage power-on condition.

[0043] In step S41, the vehicle control system 300 sends a self-test instruction to each subsystem in the vehicle 10 through a communication connection with each subsystem controller of the vehicle 10 (such as a CAN bus connection of the vehicle 10); each subsystem controller in the vehicle 10 responds to the self-test instruction to check whether its corresponding subsystem meets the high-voltage power-on condition.

[0044] For example, the subsystem performing self-test includes at least a motor control unit (MCU) and a battery management system 400 (BMS). In addition, in some examples, the subsystem performing self-test may also include a DC-DC converter, a heat management system, and a high-voltage power distribution system. The high-voltage power distribution system includes, for example, an on-board charger (OBS) and a high-voltage distribution box.

[0045] When the battery management system 400 performs self-test, it checks whether the battery high-voltage loop interlock is normal, whether the insulation state of the high-voltage battery 500 / vehicle circuit is normal, and whether the voltage difference and temperature state of the high-voltage battery 500 are normal. When the motor control system performs self-test, it checks whether the motor control system circuit is normal (such as whether the power device is normal), whether the three-phase winding resistance balance is normal, and whether the bus pre-charge capacity state is normal.

[0046] It should be noted that when the vehicle 10 subsystem self-checks whether various power-on indicators are normal, it can refer to industry standards or make judgments. For example, when the battery management system 400 detects that the voltage deviation value of each cell in the high-voltage battery 500 is less than 50mV, it determines that the voltage difference of the high-voltage battery 500 is normal; when the battery management system 400 detects that the insulation resistance value of the high-voltage battery 500 to the ground is greater than 500Ω / V, it determines that the insulation state of the high-voltage battery 500 / the entire vehicle circuit is normal; when the motor control system detects that the static resistance deviation value of the three-phase winding resistance is less than 5%, it determines that the three-phase winding resistance is in a balanced state. S42: If each subsystem performing self-inspection in the vehicle 10 meets the high-voltage power-on condition, the vehicle control system 300 sends a high-voltage power-on instruction to the battery management system 400.

[0047] S43. If the subsystems performing self-inspection in the vehicle 10 do not meet the high-voltage power-on condition, the vehicle control system 300 sends a fault report. After sending the fault report, the vehicle control system 300 controls the vehicle 10 to power off, and drives the low-voltage battery 100 to stop supplying power after the vehicle 10 is powered off.

[0048] Next, step S5 is executed, the battery management system 400 responds to the high-voltage power-on instruction and controls the high-voltage battery 500 to power up the vehicle 10 at high voltage.

[0049] Specific as Figure 7 As shown, in some embodiments, step S5 includes the following steps: S51 . The battery management system 400 drives the high-voltage battery 500 to pre-charge the high-voltage electrical devices of the vehicle 10 ; the high-voltage electrical devices at least include a motor control system.

[0050] Specifically, in step S51, the battery management system 400 first controls the closing of the main negative relay to connect with the high-voltage battery 500 to form a low-voltage circuit, and then controls the closing of the pre-charge relay to slowly charge the pre-charge capacitor of the motor control system through the pre-charge resistor until the bus voltage is greater than the preset voltage to complete the pre-charging. The preset voltage can be, for example, 80% of the total voltage of the high-voltage battery 500.

[0051] S52 , after the pre-charging is completed, the battery management system 400 drives the high-voltage battery 500 to supply power to the high-voltage electrical devices.

[0052] Specifically, in step S52, after the pre-charging is completed, the battery management system 400 controls the disconnection of the pre-charging relay and controls the closing of the main positive relay to achieve the connection of the high-voltage battery 500 to the external power output circuit.

[0053] See also Figure 8 and Fig. 9In a second aspect, the present invention further provides a vehicle power-on control device, which is applied to a vehicle 10 driven by electric power, and is particularly applicable to various types of pure electric vehicles and hybrid vehicles. For example, the vehicle 10 used in the present invention may be a passenger car, a commercial vehicle, or a special operation vehicle (such as a UTV vehicle). The vehicle power-on control device is connected to the electronic control circuit of the vehicle 10, and the vehicle power-on control device is used to execute the vehicle power-on control method in any of the above embodiments.

[0054] See also Figure 8 The vehicle power control device includes a low-voltage battery 100, a central control system 200, a vehicle control system 300 and a battery management system 400. The low-voltage battery 100 is used to power the low-voltage electrical devices of the vehicle 10, and the low-voltage electrical devices include the central control system 200 (such as a touch terminal), the vehicle control system 300 (such as a Vehicle Control Unit, VCU), the battery management system 400, the safety protection system (such as airbag-related devices, anti-theft devices, etc.) and the motor control system. The low-voltage battery 100, the central control system 200, the vehicle control system 300 and the battery management system 400 are electrically connected to each other for communication. For example, the low-voltage battery 100, the central control system 200, the vehicle control system 300 and the battery management system 400 are all electrically connected to the vehicle bus to achieve communication connection with each other.

[0055] The low-voltage battery 100 is electrically connected to the central control system 200, the vehicle control system 300 and the battery management system 400 through the vehicle bus to realize power supply for the central control system 200, the vehicle control system 300 and the battery management system 400. When the vehicle 10 is in a power-off dormant state, the low-voltage battery 100 still maintains power supply to the central control system 200, the vehicle control system 300, the battery management system 400 and the safety protection system. In addition, when the low-voltage battery 100's own power is lower than the preset power threshold, the low-voltage battery 100 actively cuts off the power supply to the low-voltage electrical components of the vehicle 10, effectively blocking the continuous consumption of the low-voltage battery 100's power by the dormant current, and avoiding the low-voltage battery 100's power being completely exhausted, causing the vehicle 10 to be unable to power on again.

[0056] When the user wants to restart the dormant vehicle 10 again, the central control system 200 can respond to the user's activation request to restore power to the low-voltage battery 100 from the power-off state, thereby ensuring that the vehicle 10 can continue the power-on process; after the low-voltage battery 100 is awakened and restored to power low-voltage electrical devices, the central control system 200 can respond to the start signal and further wake up the vehicle control system 300, so that the vehicle control system 300 continues the subsequent power-on control process.

[0057] After being awakened, the vehicle control system 300 communicates with the brake sensor 600 to monitor the brake pedal status within a preset time. The vehicle control system 300 identifies the user's real power-on demand based on the brake pedal status. If the vehicle control system 300 detects that the brake pedal is stepped on with a depth greater than a preset depth within a preset time, it determines that the user's operation has a real power-on demand, and sends a high-voltage power-on instruction to the battery management system 400; if the vehicle control system 300 does not detect that the brake pedal is stepped on with a depth greater than a preset depth within a preset time, it determines that the user's operation does not have a real power-on demand, and controls the vehicle 10 to enter the power-off process, and drives the low-voltage battery 100 to stop supplying power after the vehicle 10 is powered off.

[0058] The battery management system 400 responds to the high-voltage power-on instruction and drives the high-voltage battery 500 to power up the vehicle 10. Specifically, the battery management system 400 drives the high-voltage battery 500 to pre-charge the high-voltage electrical devices of the vehicle 10; after the pre-charging is completed, the battery management system 400 drives the high-voltage battery 500 to supply power to the high-voltage electrical devices. Among them, the high-voltage electrical devices include a motor control system, a drive motor, a high-voltage power distribution system, a DC-DC converter and a heat exchange management system. The high-voltage power distribution system includes an on-board charger and a high-voltage power distribution box. The heat exchange management system includes an air-conditioning compressor and a heater.

[0059] See also Figure 8 and Fig. 9In a third aspect, the present invention further provides a vehicle 10, which includes a low-voltage battery 100, a high-voltage battery 500, a central control system 200, a battery management system 400, a brake sensor 600, and a vehicle control system 300. The low-voltage battery 100 is electrically connected to the low-voltage electrical components of the vehicle 10 through wires to realize power supply for the low-voltage electrical components of the vehicle 10. For example, when the low-voltage battery 100 is in power dormancy, it still supplies power to the central control system 200, the vehicle control system 300, and the battery management system 400. The high-voltage battery 500 is electrically connected to the high-voltage electrical components of the vehicle 10 through wires to realize power supply for the high-voltage electrical components of the vehicle 10. The central control system 200 is electrically connected to the low-voltage battery 100 through wires. The battery management system 400 is used to monitor the status of the high-voltage battery 500 and control the power supply function of the high-voltage battery 500 for the high-voltage electrical components. The brake sensor 600 is located at the setting position of the brake pedal in the vehicle 10. The brake sensor 600 is used to monitor the state of the brake pedal. For example, the brake sensor 600 is set on the brake pedal. The brake sensor 600 generates a corresponding current signal according to the stepping depth of the brake pedal, and sends the generated current signal to the vehicle controller to complete the monitoring of the stepping state of the brake pedal. The vehicle control system 300 is connected in communication with each subsystem of the vehicle 10. For example, the vehicle control system 300 is connected in communication with the low-voltage battery 100, the central control system 200, the battery management system 400 and the brake sensor 600 through the vehicle bus.

[0060] like Figure 2 and Figure 8As shown, the low-voltage battery 100, the high-voltage battery 500, the central control system 200, the battery management system 400, the brake sensor 600 and the vehicle control system 300 in the vehicle 10 can cooperate to realize the power-on process of the vehicle 10 after the low-voltage battery 100 is powered off. Specifically, when the vehicle 10 is in a power-off dormant state, the low-voltage battery 100 actively cuts off the power supply to the low-voltage electrical components of the vehicle 10 when its own power is lower than the preset power threshold, effectively blocking the continuous consumption of the power of the low-voltage battery 100 by the dormant current, and avoiding the low-voltage battery 100 from being completely exhausted, so that the vehicle 10 cannot be powered on again. When the user wants to restart the dormant vehicle 10, the central control system 200 can respond to the user's activation request and drive the low-voltage battery 100 to resume power supply from the power-off state, so that the vehicle 10 can continue the power-on process; after the low-voltage battery 100 is awakened and resumes powering the low-voltage electrical devices, the central control system 200 can respond to the start signal and further wake up the vehicle control system 300, so that the vehicle control system 300 continues the subsequent power-on control process. After being awakened, the vehicle control system 300 communicates with the brake sensor 600 to monitor the brake pedal status within a preset time. If the vehicle control system 300 detects that the brake pedal is stepped on more than the preset depth within the preset time, it sends a high-voltage power-on instruction to the battery management system 400; the battery management system 400 responds to the high-voltage power-on instruction and drives the high-voltage battery 500 to power the vehicle 10 at high voltage.

[0061] like Figure 2 and Figure 8 As shown, in some implementations, before sending a high-voltage power-on instruction to the battery management system 400, the vehicle control system 300 also controls each subsystem in the vehicle 10 to perform self-inspection to determine whether each subsystem in the vehicle 10 meets the high-voltage power-on condition; if satisfied, the vehicle control system 300 sends a high-voltage power-on instruction to the battery management system 400; if not satisfied, the vehicle control system 300 controls the vehicle 10 to power off. Among them, the subsystems that perform self-inspection include at least the motor control system and the battery management system 400. In addition, in some examples, the subsystems that perform self-inspection may also include a DC-DC converter, a heat exchange management system, and a high-voltage power distribution system.

[0062] In summary, the vehicle power-on control method of the present invention utilizes the coordinated operation between multiple systems to realize power protection for the low-voltage battery and effective wake-up after power failure during long-term parking of the vehicle, so that the low-voltage battery can maintain basic power under long-term static conditions; and through the hierarchical wake-up of the low-voltage battery and the vehicle controller and the high-voltage power-on command triggering mechanism based on the brake pedal status, unnecessary power loss of the low-voltage battery caused by user misoperation is avoided, ensuring that the vehicle can complete the power-on process even after ultra-long-term parking. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0064] It should be understood that, although each operation step is indicated by arrows in the flowchart of the embodiment of the present application, the implementation order of these steps is not limited to the order indicated by the arrows. Unless clearly stated herein, in some implementation scenarios of the embodiment of the present application, the implementation steps in each flowchart can be performed in other orders according to demand. In addition, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, and each sub-step or stage in these sub-steps or stages may also be executed at different times respectively. In different scenarios of execution time, the execution order of these sub-steps or stages may be flexibly configured according to demand, and the embodiment of the present application does not limit this.

Claims

1. A vehicle power-on control method, characterized in that: include: When the vehicle is in a power-off state, the low-voltage battery stops supplying power to the low-voltage electrical components of the vehicle when the power level is lower than a preset power threshold; The central control system responds to the activation request and drives the low-voltage battery to resume supplying power to the low-voltage electrical devices of the vehicle; The central control system responds to the start signal to wake up the vehicle control system; The vehicle control system detects the brake pedal state within a preset time, and if it is detected that the brake pedal is stepped on with a depth greater than a preset depth, a high-voltage power-on instruction is sent to the battery management system; The battery management system responds to the high-voltage power-on instruction and controls the high-voltage battery to power up the vehicle at high voltage.

2. The vehicle power-on control method according to claim 1, characterized in that: The central control system responds to the activation request and drives the low-voltage battery to resume supplying power to the low-voltage electrical devices of the vehicle, including: The central control system generates an activation signal in response to the activation request, and sends the activation signal to the low-voltage battery through line communication; wherein the activation signal is a signal generated by pressing a switch button on the central control system; The low-voltage battery responds to the activation signal and resumes supplying power to the low-voltage electrical components of the vehicle.

3. The vehicle power-on control method according to claim 1, characterized in that: The central control system responds to the start signal to wake up the vehicle control system, including: The central control system responds to the start signal and sends a start command to the vehicle control system; the start signal is a Bluetooth key signal verified by the central control system, the Bluetooth key signal is sent to the central control system by the Bluetooth key, and the Bluetooth key matches the central control system; The vehicle control system starts up from a dormant state in response to the power-on instruction.

4. The vehicle power-on control method according to claim 1, characterized in that: The central control system responds to the start signal to wake up the vehicle control system, including: The central control system responds to the start signal and sends a start command to the vehicle control system; the start signal is a signal generated by the central control system when it detects that the signal strength of the Bluetooth key is greater than a preset strength threshold, the Bluetooth key signal is sent by the Bluetooth key, and the Bluetooth key matches the central control system; The vehicle control system starts up from a dormant state in response to the power-on instruction.

5. The vehicle power-on control method according to claim 1, characterized in that: Before the vehicle control system sends a high voltage power-on instruction to the battery management system, it also includes a self-checking step for each subsystem of the vehicle, and the self-checking step includes: The vehicle control system drives each subsystem in the vehicle to perform self-check to determine whether each subsystem in the vehicle meets the high-voltage power-on condition; If the conditions are met, the vehicle control system sends a high voltage power-on instruction to the battery management system; If not, the vehicle control system controls the vehicle to be powered off, and drives the low-voltage battery to stop supplying power after the vehicle is powered off.

6. The vehicle power-on control method according to claim 1, characterized in that: The battery management system responds to the high-voltage power-on instruction and controls the high-voltage battery to power up the vehicle at high voltage, including: The battery management system drives the high-voltage battery to pre-charge the high-voltage electrical components of the vehicle; the high-voltage electrical components at least include a motor control system; After the pre-charging is completed, the battery management system drives the high-voltage battery to supply power to the high-voltage electrical device.

7. The vehicle power-on control method according to claim 1, characterized in that: Also includes: The vehicle control system detects the brake pedal state within a preset time, and if it is not detected that the brake pedal is depressed to a depth greater than a preset depth, controls the vehicle to be powered off, and drives the low-voltage battery to stop supplying power after the vehicle is powered off.

8. A vehicle power-on control device, characterized in that: include: A low-voltage battery, which is used to supply power to low-voltage electrical devices of the vehicle; wherein, when the vehicle is in a power-off state, the low-voltage battery stops supplying power when the power level is lower than a preset power threshold; A central control system, which responds to the activation request to drive the low-voltage battery to resume power supply, and responds to the start signal to wake up the vehicle control system; A vehicle control system, wherein the vehicle control system detects the state of the brake pedal within a preset time, and if it is detected that the depression depth of the brake pedal is greater than a preset depth, a high-voltage power-on instruction is sent to the battery management system; A battery management system, wherein the battery management system responds to the high-voltage power-on instruction and controls the high-voltage battery to perform high-voltage power-on for the vehicle.

9. A vehicle, characterized in that: include: A low-voltage battery, which is used to supply power to the low-voltage electrical components of the vehicle; A high-voltage battery, which is used to supply power to the high-voltage electrical devices of the vehicle; A central control system, which is electrically connected to the low-voltage battery through wires; A battery management system, which is used to control the high-voltage battery to supply power to the high-voltage electrical device; a brake sensor, which is used to monitor the status of the brake pedal; A vehicle control system, which is communicatively connected with the central control system, the battery management system and the brake sensor; Among them, when the vehicle is in a power-off state, the low-voltage battery stops supplying power when the power level is lower than a preset power threshold; the central control system responds to the activation request to drive the low-voltage battery to resume power supply, and responds to the start signal to wake up the vehicle control system; the vehicle control system detects the brake pedal status by communicating with the brake sensor within a preset time, and if it is detected that the brake pedal is stepped on with a depth greater than a preset depth, a high-voltage power-on instruction is sent to the battery management system; the battery management system responds to the high-voltage power-on instruction and controls the high-voltage battery to power on the vehicle at high voltage.

10. The vehicle according to claim 9, characterized in that Before sending a high-voltage power-on command to the battery management system, the vehicle control system also controls each subsystem in the vehicle to perform a self-check to determine whether each subsystem in the vehicle meets the high-voltage power-on conditions; if so, the vehicle control system sends a high-voltage power-on command to the battery management system; if not, the vehicle control system controls the vehicle to power off.

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