Method and system for controlling external discharge of automobile and hybrid automobile

Abstract

The invention provides a control method and system for external discharge of an automobile, a hybrid automobile, electronic equipment and a storage medium, and belongs to the technical field of automobile control. The method responds to an external discharging instruction, and whether external discharging of an automobile is allowed to start an engine or not is detected; detecting whether the automobile meets a first preset condition for starting external discharge or not when detecting that the external discharge of the automobile allows to start the engine, and if yes, controlling to start an external discharge function. When it is detected that the engine is not allowed to be started during external discharging of the automobile, whether the automobile meets a second preset condition for starting external discharging or not is further detected; and if yes, controlling to start an external discharge function. And after the external discharging function is started, when it is detected that the automobile meets the external discharging stopping condition, the automobile is controlled to stop the external discharging function. Therefore, the personalized power utilization requirements of the user in different power utilization scenes and different automobile states can be met, the power utilization continuity is ensured, and the power utilization experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle control, and particularly to a control method and system for external power discharge of a vehicle, a hybrid vehicle, an electronic device, and a storage medium. Background Art

[0002] With the popularization and spread of hybrid vehicles, more and more users choose hybrid vehicles as means of transportation. In some emergency situations, if a hybrid vehicle can achieve external power discharge, it will bring great convenience to people's lives. For example, when going on an outing in the wild, a hybrid vehicle can be used as a power source for users to use induction cookers, computers, etc. during the outing.

[0003] However, in the prior art, a hybrid vehicle can only discharge power externally using a power battery. Due to the limited power stored in the power battery, simply discharging power externally through the power battery often cannot meet the user's power consumption requirements and cannot achieve a good user experience. Summary of the Invention

[0004] The main objective of the embodiments of the present application is to propose a control method and system for external power discharge of a vehicle, a hybrid vehicle, an electronic device, and a storage medium. The aim is to precisely control the external power discharge process, be able to meet the personalized power consumption requirements of users in different power consumption scenarios and different vehicle states, ensure power supply continuity, and improve the power consumption experience.

[0005] To achieve the above objective, in the first aspect of the embodiments of the present application, a control method for external power discharge of a vehicle is proposed. The method includes:

[0006] In response to an external power discharge start instruction, detect whether the vehicle allows the engine to be started for external power discharge;

[0007] When it is detected that the vehicle allows the engine to be started for external power discharge, detect whether the vehicle meets the first preset condition for starting external power discharge;

[0008] When it is detected that the vehicle does not allow the engine to be started for external power discharge, detect whether the vehicle meets the second preset condition for starting external power discharge;

[0009] When it is detected that the vehicle meets the first preset condition, or it is detected that the vehicle meets the second preset condition, control the vehicle to turn on the external power discharge function;

[0010] After the external power discharge function is turned on, detect whether the vehicle meets the condition for stopping external power discharge;

[0011] When it is detected that the vehicle meets the condition for stopping external power discharge, control the vehicle to turn off the external power discharge function.

[0012] In the embodiment of the present application, the execution entity is a vehicle controller. The vehicle controller responds to an external power discharge instruction and first detects whether the vehicle is allowed to start the engine for external power discharge. When it is detected that the vehicle is allowed to start the engine for external power discharge, it further detects whether the vehicle meets the first preset condition for enabling external power discharge. If it meets the condition, it controls the vehicle to enable the external power discharge function. When it is detected that the vehicle is not allowed to start the engine for external power discharge, it further detects whether the vehicle meets the second preset condition for enabling external power discharge. If it meets the condition, it controls the vehicle to enable the external power discharge function. After the external power discharge function is enabled, it continuously detects whether the vehicle meets the condition for stopping external power discharge. When it is detected that the vehicle meets the condition for stopping external power discharge, it controls the vehicle to disable the external power discharge function. Thus, by accurately controlling the enabling and disabling of the vehicle's external power discharge function through condition judgment, it can meet the personalized power consumption needs of users in different power consumption scenarios and different vehicle states, ensure power continuity, and improve the power consumption experience.

[0013] In an embodiment of the present application, detecting whether the vehicle is allowed to start the engine for external power discharge includes:

[0014] Detecting whether the human-machine interface is set to allow starting the engine for external power discharge, whether there is a starting failure of the engine or generator, and whether the vehicle fuel has reached the low fuel level alarm;

[0015] When it is detected that the human-machine interface is set to allow starting the engine for external power discharge, and there is no starting failure of the engine and generator, and the vehicle fuel has not reached the low fuel level alarm position, it is determined that the vehicle is allowed to start the engine for external power discharge;

[0016] When it is detected that the human-machine interface is set not to allow starting the engine for external power discharge, or there is a starting failure of the engine or generator, or the vehicle fuel has reached the low fuel level alarm position, it is determined that the vehicle is not allowed to start the engine for external power discharge.

[0017] In the embodiment of the present application, by detecting whether the human-machine interface is set to allow starting the engine for external power discharge, whether there is a starting failure of the engine or generator, and whether the vehicle fuel has reached the low fuel level alarm, it can effectively determine whether the vehicle is allowed to start the engine for external power discharge. Specifically, when it is detected that the human-machine interface is set to allow starting the engine for external power discharge, and there is no starting failure of the engine and generator, and the vehicle fuel has not reached the low fuel level alarm position, it can be determined that the vehicle is allowed to start the engine for external power discharge. When it is detected that the human-machine interface is set not to allow starting the engine for external power discharge, or there is a starting failure of the engine or generator, or the vehicle fuel has reached the low fuel level alarm position, it is determined that the vehicle is not allowed to start the engine for external power discharge. Thus, subsequently, the situations where the vehicle is allowed to start the engine for external power discharge and not allowed to start the engine for external power discharge can be classified and considered for judgment to determine whether the external power discharge function can be enabled.

[0018] In an embodiment of the present application, detecting whether the vehicle meets the first preset condition for enabling external power discharge includes:

[0019] Detecting whether the vehicle meets the initial condition for external power discharge;

[0020] When it is detected that the vehicle meets the initial condition for external power discharge, detecting whether the first available power of the vehicle's external power discharge is greater than the first power threshold, and detecting whether the displayed remaining power of the power battery is greater than the first power threshold;

[0021] When it is detected that the first available power of the vehicle's external power discharge is greater than the first power threshold and the displayed remaining power of the power battery is greater than the first power threshold, it is determined that the vehicle meets the first preset condition for enabling external power discharge.

[0022] In the embodiment of the present application, for the case where the engine is allowed to start for external power discharge, it is possible to determine whether to enable the external power discharge function by detecting whether the vehicle meets the first preset condition for enabling external power discharge. If it is met, the external power discharge function is enabled; if not, the external power discharge function is not enabled. Specifically, the first preset condition includes whether the vehicle meets the initial condition for external power discharge, whether the first available power of the vehicle's external power discharge is greater than the first power threshold, and detecting whether the displayed remaining power of the power battery is greater than the first power threshold. If the vehicle meets the initial condition for external power discharge, and the first available power of the vehicle's external power discharge is greater than the first power threshold, and the displayed remaining power of the power battery is greater than the first power threshold, it can be determined that the vehicle meets the first preset condition for enabling external power discharge. At this time, the external power discharge function can be controlled to be enabled.

[0023] In an embodiment of the present application, detecting whether the vehicle meets the second preset condition for enabling external power discharge includes:

[0024] Detecting whether the vehicle meets the initial condition for external power discharge;

[0025] When it is detected that the vehicle meets the initial condition for external power discharge, detecting whether the second available power of the vehicle's external power discharge is greater than the second power threshold, and detecting whether the displayed remaining power of the power battery is greater than the discharge cut-off remaining power set by the human-machine interface;

[0026] When it is detected that the second available power of the vehicle's external power discharge is greater than the second power threshold and the displayed remaining power of the power battery is greater than the discharge cut-off remaining power set by the human-machine interface, it is determined that the vehicle meets the second preset condition for enabling external power discharge.

[0027] In the embodiments of the present application, for the case where the engine is not allowed to be started during external power discharge, it is possible to determine whether to enable the external power discharge function by detecting whether the vehicle meets the second preset condition for enabling external power discharge. If it is met, the external power discharge function is enabled; if not, the external power discharge function is not enabled. Specifically, the second preset condition includes whether the vehicle meets the initial condition for external power discharge, whether the second available power for external power discharge of the vehicle is greater than the second power threshold, and detecting whether the displayed remaining power of the power battery is greater than the remaining power at the discharge cut-off set by the human-machine interface. If the vehicle meets the initial condition for external power discharge, and the second available power for external power discharge of the vehicle is greater than the second power threshold, and the displayed remaining power of the power battery is greater than the remaining power at the discharge cut-off set by the human-machine interface, it can be determined that the vehicle meets the second preset condition for enabling external power discharge. At this time, the external power discharge function can be controlled to be enabled.

[0028] In one embodiment of the present application, detecting whether the vehicle meets the initial condition for external power discharge includes:

[0029] Detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether high-voltage power-on is completed, whether the DC-DC converter is working properly, and whether there is a fault in the on-vehicle charger / discharger;

[0030] When it is detected that the vehicle gear is in the parking gear, the discharge gun is effectively connected, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, high-voltage power-on is completed, the DC-DC converter is working properly, and there is no fault in the on-vehicle charger / discharger, it is determined that the vehicle meets the initial condition for external power discharge;

[0031] When it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or high-voltage power-on is not completed, or the DC-DC converter is not working properly, or there is a fault in the on-vehicle charger / discharger, it is determined that the vehicle does not meet the initial condition for external power discharge.

[0032] In the embodiments of the present application, by detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether high-voltage power-on is completed, whether the DC-DC converter is working properly, and whether there is a fault in the on-vehicle charger / discharger, it is possible to effectively determine whether the vehicle meets the initial condition for external power discharge. Specifically, when it is detected that the vehicle gear is in the parking gear, the discharge gun is effectively connected, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, high-voltage power-on is completed, the DC-DC converter is working properly, and there is no fault in the on-vehicle charger / discharger, it can be determined that the vehicle meets the initial condition for external power discharge.

[0033] In one embodiment of the present application, detecting whether the vehicle meets the condition for stopping external power discharge includes:

[0034] When the vehicle is allowed to start the engine for external power discharge and the engine and generator start to generate electricity, detecting whether the first available power of the vehicle's external power discharge is less than a third power threshold, and detecting whether the displayed remaining power of the power battery is less than a second power threshold;

[0035] When it is detected that the first available power of the vehicle's external power discharge is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, it is determined that the vehicle meets the condition for stopping external power discharge.

[0036] In the embodiment of the present application, detecting whether the vehicle meets the condition for stopping external power discharge needs to be judged according to different situations. For the situation where the vehicle is allowed to start the engine for external power discharge and the engine and generator start to generate electricity, it can be effectively judged whether the vehicle meets the condition for stopping external power discharge by detecting whether the first available power of the vehicle's external power discharge is less than the third power threshold and detecting whether the displayed remaining power of the power battery is less than the second power threshold. Specifically, when it is detected that the first available power of the vehicle's external power discharge is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, it can be determined that the vehicle meets the condition for stopping external power discharge. At this time, the external power discharge function can be turned off to stop external power discharge.

[0037] In one embodiment of the present application, detecting whether the vehicle meets the condition for stopping external power discharge includes:

[0038] When the vehicle is not allowed to start the engine for external power discharge, detecting whether the second available power of the vehicle's external power discharge is less than a fourth power threshold, and detecting whether the displayed remaining power of the power battery is less than the discharge cut-off remaining power set by the human-machine interface;

[0039] When it is detected that the second available power of the vehicle's external power discharge is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the discharge cut-off remaining power set by the human-machine interface, it is determined that the vehicle meets the condition for stopping external power discharge.

[0040] In the embodiments of the present application, determining whether the vehicle meets the condition for stopping external power discharge needs to be judged in different cases. For the case where the engine is not allowed to start during external power discharge of the vehicle in the embodiments of the present application, it can be effectively determined whether the vehicle meets the condition for stopping external power discharge by detecting whether the second available power of the vehicle's external power discharge is less than the fourth power threshold and detecting whether the displayed remaining power of the power battery is less than the remaining power cut-off for discharge set by the human-machine interface. Specifically, when it is detected that the second available power of the vehicle's external power discharge is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the remaining power cut-off for discharge set by the human-machine interface, it can be determined that the vehicle meets the condition for stopping external power discharge. At this time, the external power discharge function can be turned off to stop external power discharge.

[0041] In one embodiment of the present application, detecting whether the vehicle meets the condition for stopping external power discharge includes:

[0042] Detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether a request to stop external power discharge is received, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether there is a fault in the on-vehicle charger / discharger, and whether the duration of external power discharge has reached the preset discharge duration;

[0043] When it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or a request to stop external power discharge is received, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or there is a fault in the on-vehicle charger / discharger, or the duration of external power discharge has reached the preset discharge duration, it is determined that the vehicle meets the condition for stopping external power discharge;

[0044] When it is detected that the vehicle gear is in the parking gear, and the discharge gun is not effectively connected, and a request to stop external power discharge is not received, and the temperature of the discharge terminal is normal, and there is no system fault affecting high-voltage power-on, and there is no fault in the on-vehicle charger / discharger, and the duration of external power discharge has not reached the preset duration, it is determined that the vehicle does not meet the condition for stopping external power discharge.

[0045] In the embodiments of the present application, determining whether the vehicle meets the condition for stopping external power discharge needs to be judged according to different situations. In the embodiments of the present application, it is also possible to effectively determine whether the vehicle meets the condition for stopping external power discharge by detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether a request for stopping external power discharge is received, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether there is a fault in the on-vehicle charger / discharger, and whether the duration of external power discharge reaches the preset discharge duration. Specifically, when it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or a request for stopping external power discharge is received, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or there is a fault in the on-vehicle charger / discharger, or the duration of external power discharge reaches the preset discharge duration, it can be determined that the vehicle meets the condition for stopping external power discharge. At this time, the external power discharge function can be turned off to stop external power discharge.

[0046] In an embodiment of the present application, the first available power for external power discharge of the vehicle is calculated through the following steps:

[0047] Obtain the power generation power of the generator and the peak power after the external power discharge of the power battery is limited;

[0048] Obtain the power consumption of the air-conditioning compressor and the power consumption of the thermal resistor, and use the sum of the power consumption of the air-conditioning compressor and the power consumption of the thermal resistor as the total power consumption of the air conditioner;

[0049] Obtain the voltage and current on the high-voltage side of the DC-DC converter, and multiply the voltage and current on the high-voltage side of the DC-DC converter to obtain the power consumption of the low-voltage accessories;

[0050] After adding the power generation power of the generator and the peak power, subtract the total power consumption of the air conditioner and then subtract the power consumption of the low-voltage accessories to obtain the first available power for external power discharge of the vehicle.

[0051] In the embodiments of the present application, for the case where the vehicle is allowed to start the engine during external power discharge, the vehicle controller will control the start of the engine and the generator to generate electricity. At this time, by adding the peak power after the power generation of the generator is limited by the external power discharge of the power battery, subtracting the total power consumption of the air conditioner and then subtracting the power consumption of the low-voltage accessories, the first available power for the vehicle to discharge externally can be obtained. Thus, for the case where the vehicle is allowed to start the engine during external power discharge, by comparing the first available power with the first power threshold, and when the first available power is greater than the first power threshold, that is, the power battery can meet the continuous external power discharge of the internal high- and low-voltage loads at the same time and other external power discharge conditions are met, the external power discharge function can be timely controlled to be turned on to start continuous external power discharge. And by comparing the first available power with the third power threshold, and when the first available power is less than the first power threshold, that is, the power battery cannot meet the continuous external power discharge of the internal high- and low-voltage loads at the same time, the external power discharge function can be timely controlled to be turned off to stop external power discharge.

[0052] In an embodiment of the present application, the second available power for the vehicle to discharge externally is calculated through the following steps:

[0053] Obtain the peak power after the external power discharge of the power battery is limited;

[0054] Obtain the power consumption of the air conditioner compressor and the power consumption of the heating resistor, and use the sum of the power consumption of the air conditioner compressor and the power consumption of the heating resistor as the total power consumption of the air conditioner;

[0055] Obtain the voltage and current on the high-voltage side of the DC-DC converter, and multiply the voltage and current on the high-voltage side of the DC-DC converter to obtain the power consumption of the low-voltage accessories;

[0056] Subtract the total power consumption of the air conditioner and the power consumption of the low-voltage accessories from the peak power to obtain the second available power for the vehicle to discharge externally.

[0057] In the embodiments of the present application, for the case where the vehicle is not allowed to start the engine during external power discharge, by subtracting the total power consumption of the air conditioner and the power consumption of the low-voltage accessories from the peak power after the external power discharge of the power battery is limited, the second available power for the vehicle to discharge externally can be obtained. Thus, for the case where the vehicle is not allowed to start the engine during external power discharge, by comparing the second available power with the second power threshold, and when the first available power is greater than the second power threshold, that is, the power battery can meet the continuous external power discharge of the internal high- and low-voltage loads at the same time and other external power discharge conditions are met, the external power discharge function can be timely controlled to be turned on to start continuous external power discharge. And by comparing the second available power with the fourth power threshold, and when the second available power is less than the fourth power threshold, that is, the power battery cannot meet the continuous external power discharge of the internal high- and low-voltage loads at the same time, the external power discharge function can be timely controlled to be turned off to stop external power discharge.

[0058] To achieve the above object, a second aspect of the embodiments of the present application provides a control system for external power discharge of an automobile, including: a human-machine interaction control unit, a power battery management unit, an engine control unit, a generator control unit, a vehicle controller, an on-vehicle charging and discharging control unit, and an air-conditioning control unit; the human-machine interaction control unit, the power battery management unit, the engine control unit, the generator control unit, the on-vehicle charging and discharging control unit, and the air-conditioning control unit are all connected to the vehicle controller;

[0059] The human-machine interaction control unit is configured to receive the discharge condition information set by the human-machine interaction interface and upload it to the vehicle controller, and the discharge condition information includes allowing the engine to start for external power discharge, not allowing the engine to start for external power discharge, the remaining power until the end of discharge, and the preset discharge duration;

[0060] The power battery management unit is configured to detect and obtain the power battery status information and upload it to the vehicle controller, and the power battery status information includes the displayed remaining power of the power battery and the peak power after the external power discharge limit of the power battery;

[0061] The engine control unit is configured to detect and obtain the engine status information and upload it to the vehicle controller;

[0062] The generator control unit is configured to detect and obtain the generator status information and upload it to the vehicle controller;

[0063] The on-vehicle charging and discharging control unit includes an AC-DC inverter unit and a DC-DC converter, and the on-vehicle charging and discharging control is configured to upload the connection status of the discharge gun, the status of the on-vehicle charger, the working status of the DC-DC converter, and the voltage and current on the high-voltage side of the DC-DC converter to the vehicle controller;

[0064] The air-conditioning control unit is configured to upload the power consumption of the air-conditioning compressor and the power consumption of the thermal resistor to the vehicle controller;

[0065] The vehicle controller is configured to receive the information sent by the human-machine interaction control unit, the power battery management unit, the engine control unit, the generator control unit, the on-vehicle charging and discharging control unit, and the air-conditioning control unit, and execute the control method provided in any embodiment of the present application.

[0066] In the embodiments of the present application, the vehicle controller is respectively connected to the human-machine interaction control unit, the power battery management unit, the engine control unit, the generator control unit, the on-vehicle charging and discharging control unit, and the air-conditioning control unit. Thus, the vehicle controller can realize the external discharge control method provided in any embodiment of the present application through the interaction with the human-machine interaction control unit, the power battery management unit, the engine control unit, the generator control unit, the on-vehicle charging and discharging control unit, and the air-conditioning control unit, so as to meet the personalized power consumption needs of users in different power consumption scenarios and different vehicle states, ensure power continuity, and improve the power consumption experience.

[0067] In an embodiment of the present application, the human-machine interaction control unit includes an external discharge request button interface, a remaining power setting interface for discharge cutoff, an external discharge engine start permission switch interface, and a preset discharge duration setting interface.

[0068] In the embodiments of the present application, the human-machine interaction control unit is provided with an external discharge request button interface, a remaining power setting interface for discharge cutoff, an external discharge engine start permission switch interface, and a preset discharge duration setting interface. Thus, users can perform personalized discharge settings through the human-machine interaction control unit, which can meet the personalized discharge needs of users.

[0069] To achieve the above object, a third aspect of the embodiments of the present application proposes a hybrid vehicle, and the hybrid vehicle is used to execute the method provided in any embodiment of the present application.

[0070] To achieve the above object, a fourth aspect of the embodiments of the present application proposes an electronic device, and the electronic device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the method provided in any embodiment of the present application is implemented.

[0071] To achieve the above object, a fifth aspect of the embodiments of the present application proposes a computer-readable storage medium, and the storage medium stores a computer program. When the computer program is executed by a processor, the method provided in any embodiment of the present application is implemented. Description of the Drawings

[0072] Figure 1 is a schematic structural diagram of a control system for external discharge of a vehicle provided by an embodiment of the present application;

[0073] Figure 2 is a flowchart of a control method for external discharge of a vehicle provided by an embodiment of the present application;

[0074] Figure 3 is a flowchart of steps for detecting whether the engine can be started for external discharge of a vehicle provided by an embodiment of the present application;

[0075] Figure 4It is a flowchart of steps for detecting whether a vehicle meets the first preset condition for enabling external power discharge provided by an embodiment of the present application;

[0076] Figure 5 It is a flowchart of steps for detecting whether a vehicle meets the second preset condition for enabling external power discharge provided by an embodiment of the present application;

[0077] Figure 6 It is a flowchart of steps for detecting whether a vehicle meets the initial condition for external power discharge provided by an embodiment of the present application;

[0078] Figure 7 It is a flowchart of steps for detecting whether a vehicle meets the condition for stopping external power discharge provided by an embodiment of the present application;

[0079] Figure 8 It is a flowchart of a control method for external power discharge that allows starting the engine for external power discharge of a vehicle provided by an embodiment of the present application;

[0080] Figure 9 It is a flowchart of steps for calculating the first available power of external power discharge of a vehicle provided by an embodiment of the present application;

[0081] Figure 10 It is another flowchart of steps for detecting whether a vehicle meets the condition for stopping external power discharge provided by an embodiment of the present application;

[0082] Figure 11 It is a flowchart of a control method for external power discharge that does not allow starting the engine for external power discharge of a vehicle provided by an embodiment of the present application;

[0083] Figure 12 It is a flowchart of steps for calculating the second available power of external power discharge of a vehicle provided by an embodiment of the present application;

[0084] Figure 13 It is another flowchart of steps for detecting whether a vehicle meets the condition for stopping external power discharge provided by an embodiment of the present application;

[0085] Figure 14 It is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present application.

[0086] Description of reference numerals:

[0087] Human-machine interaction control unit - 110; Power battery management unit - 120; Engine control unit - 130; Generator control unit - 140; Vehicle controller - 150; On-vehicle charging and discharging control unit - 160; Air-conditioning control unit - 170. Detailed implementation manners

[0088] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0089] It should be noted that although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different module division in the device or a different order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0090] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0091] With the popularization and widespread use of hybrid electric vehicles, more and more users choose hybrid electric vehicles as a means of transportation. In some emergency situations, if a hybrid electric vehicle can discharge electricity externally, it will bring great convenience to people's lives. For example, when going on an outing in the wild, a hybrid electric vehicle can be used as a power source for users to use induction cookers, computers, etc. during the outing.

[0092] However, in the prior art, a hybrid electric vehicle can only discharge electricity externally using a power battery. Since the power stored in the power battery is limited, simply discharging electricity externally through the power battery often cannot meet the user's electricity demand and cannot achieve a good user experience.

[0093] Based on this, the embodiments of the present application propose a control method for external power discharge of an automobile, aiming to accurately control the external power discharge process, meet the personalized electricity demands of users in different electricity usage scenarios and different vehicle states, ensure the continuity of electricity usage, and improve the electricity usage experience.

[0094] Refer to Figure 1 , Figure 1 is a schematic structural diagram of the control system for external power discharge of an automobile provided by the embodiments of the present application. From Figure 1As shown in the figure, the control system for the external power discharge of the vehicle includes a human-machine interaction control unit 110, a power battery management unit 120, an engine control unit 130, a generator control unit 140, a vehicle controller 150, an in-vehicle charge and discharge control unit 160, and an air-conditioning control unit 170. Among them, the human-machine interaction control unit 110, the power battery management unit 120, the engine control unit 130, the generator control unit 140, the in-vehicle charge and discharge control unit 160, and the air-conditioning control unit 170 are all communicatively connected to the vehicle controller 150 through the CAN bus. Among them:

[0095] The human-machine interaction control unit 110 is used to receive the discharge condition information set by the human-machine interface and upload it to the vehicle controller 150. The discharge condition information includes allowing the engine to start for external power discharge, not allowing the engine to start for external power discharge, the remaining power until the end of discharge, and the preset discharge duration. The discharge condition information also includes turning on the external power discharge function and turning off the external power discharge function.

[0096] The power battery management unit 120 is used to detect and obtain the power battery status information and upload it to the vehicle controller 150. The power battery status information includes the displayed remaining power of the power battery and the peak power after the external power discharge limit of the power battery. The power battery management unit 120 is also used to report the power battery fault status to the vehicle controller 150 and respond to the high-voltage power-on and power-off requests sent by the vehicle controller 150 to control the high-voltage relay switch.

[0097] The engine control unit 130 is used to detect and obtain the engine status information and upload it to the vehicle controller 150. The engine control unit 130 is also used to report the engine fault status, speed, torque and other status information to the vehicle controller 150 and respond to the engine start-stop, speed and torque control requests sent by the vehicle controller 150 to control the engine start and stop.

[0098] The generator control unit 140 is used to detect and obtain the generator status information and upload it to the vehicle controller 150. The generator control unit 140 is also used to report the generator fault status, working mode, speed, torque and other status information to the vehicle controller 150 and respond to the generator working mode, speed and torque control requests sent by the vehicle controller 150.

[0099] The on-vehicle charge and discharge control unit 160 includes an AC-DC inverter unit (OBC) and a DC-DC converter (DCDC). The on-vehicle charge and discharge control unit 160 is used to upload the connection status of the discharge gun, the status of the on-vehicle charger, the working status of the DC-DC converter (DCDC), and the voltage and current on the high-voltage side of the DC-DC converter (DCDC) to the vehicle controller 150. The on-vehicle charge and discharge control unit 160 also reports information such as the type of the charge and discharge gun (V2V, V2L), the current and voltage information on the AC and DC sides of the inverter, the working modes and fault information of the AC-DC inverter unit (OBC) and the DC-DC converter (DCDC), and the discharge capacity of the discharge gun to the vehicle controller 150, and responds to the mode requests and power limits of the vehicle controller 150 for the AC-DC inverter unit (OBC) and the DC-DC converter (DCDC).

[0100] The air-conditioning control unit 170 is used to upload the power consumed by the air-conditioning compressor and the power consumed by the thermal resistor to the vehicle controller 150. The air-conditioning control unit 170 also reports information such as its own fault status and working mode to the vehicle controller 150, and responds to the mode requests and power limits of the vehicle controller 150 for the air-conditioning system.

[0101] The vehicle controller 150 is used to receive the information sent by the human-machine interaction control unit 110, the power battery management unit 120, the engine control unit 130, the generator control unit 140, the on-vehicle charge and discharge control unit 160, and the air-conditioning control unit 170, and receive the status information of the engine and each high-voltage component. The vehicle controller 150 is also used to detect the temperature information of the charge and discharge terminals and monitor the vehicle fault information, and perform controls such as turning on and off the discharge function, powering on and off the vehicle high voltage, power distribution of the vehicle during the discharge process, and starting and stopping of the engine according to the above information, and is responsible for maintaining the network during the discharge process.

[0102] In the embodiment of the present application, since the vehicle controller 150 is respectively connected to the human-machine interaction control unit 110, the power battery management unit 120, the engine control unit 130, the generator control unit 140, the on-vehicle charge and discharge control unit 160, and the air-conditioning control unit 170, the vehicle controller 150 can precisely control the external discharge through the interaction with the human-machine interaction control unit 110, the power battery management unit 120, the engine control unit 130, the generator control unit 140, the on-vehicle charge and discharge control unit 160, and the air-conditioning control unit 170, so as to meet the personalized power consumption needs of users in different power consumption scenarios and different vehicle states, ensure the continuity of power consumption, and improve the power consumption experience.

[0103] In one embodiment of the present application, the human-machine interaction control unit 110 includes an external discharge request button interface, a remaining power setting interface for discharge cutoff, an engine start switch interface for allowing external discharge, and a preset discharge duration setting interface.

[0104] In the embodiment of the present application, the human-machine interaction control unit 110 is provided with interfaces such as an external discharge request button interface, a remaining power setting interface for discharge cutoff, an engine start switch interface for allowing external discharge, and a preset discharge duration setting interface. Thus, the user can perform personalized discharge settings through the human-machine interaction control unit 110, which can meet the user's personalized discharge needs.

[0105] Refer to Figure 2 , Figure 2 which is a flowchart of the control method for external discharge of an automobile provided by the embodiment of the present application, executed by the vehicle controller, including but not limited to steps S210 to S270.

[0106] Step S210, in response to the external discharge start instruction, detect whether the engine is allowed to start for external discharge of the automobile.

[0107] In the embodiment of the present application, when the user needs the hybrid vehicle to be used as a power source for external electrical appliances, for example, when the hybrid vehicle is used as a power source for an induction cooker, a computer, etc., at this time, the user can trigger the button of the external discharge function through the human-machine interface, thereby sending an external discharge instruction. After receiving the external discharge instruction, the vehicle controller (VCU) considers that if the power battery is sufficient to meet the internal high and low voltage load requirements and can ensure continuous external discharge for a certain period of time, the engine does not need to be started. If the power battery cannot meet the internal high and low voltage loads and continuous external discharge at the same time, the engine needs to be started. Therefore, in response to the external discharge instruction, the vehicle controller will first detect whether the engine is allowed to start for external discharge of the automobile, and then make a judgment based on the detection result in different cases.

[0108] Refer to Figure 3 , Figure 3 which is a flowchart of the steps for detecting whether the engine is allowed to start for external discharge of the automobile provided by the embodiment of the present application, executed by the vehicle controller, including but not limited to steps S310 to S330.

[0109] Step S310, detect whether the external discharge allowing engine start is set on the human-machine interface, whether there is a starting failure of the engine or generator, and whether the vehicle fuel has reached the low fuel warning level;

[0110] Step S320, when it is detected that the external discharge allowing engine start is set on the human-machine interface, and there is no starting failure of the engine and generator, and the vehicle fuel has not reached the low fuel warning level, it is determined that the engine is allowed to start for external discharge of the automobile;

[0111] Step S330: When it is detected that the human-machine interface sets that the external power discharge does not allow the engine to start, or there is a starting failure in the engine or generator, or the vehicle fuel reaches the low fuel warning level, it is determined that the vehicle's external power discharge does not allow the engine to start.

[0112] In the embodiment of the present application, if the human-machine interface is set to allow the engine to start for external power discharge, that is, the switch for allowing the engine to start for external power discharge on the human-machine interface is turned on. At this time, it is necessary to further determine whether there is a starting failure in the engine or generator and whether the vehicle fuel reaches the low fuel warning level. If there is no starting failure in the engine and generator, and the vehicle fuel does not reach the low fuel warning level, it can be determined that the vehicle's external power discharge allows the engine to start. If the human-machine interface is set not to allow the engine to start for external power discharge, that is, the switch for allowing the engine to start for external power discharge on the human-machine interface is turned off, it can be determined that the vehicle's external power discharge does not allow the engine to start. If there is a starting failure in the engine or generator, it can be determined that the vehicle's external power discharge does not allow the engine to start. If the vehicle fuel reaches the low fuel warning level, it can be determined that the vehicle's external power discharge does not allow the engine to start.

[0113] Step S220: When it is detected that the vehicle's external power discharge allows the engine to start, detect whether the vehicle meets the first preset condition for turning on the external power discharge.

[0114] In the embodiment of the present application, for the case where the vehicle's external power discharge allows the engine to start, the vehicle controller will control the engine to start and control the engine and generator to generate electricity. At this time, it is necessary to further detect whether the vehicle meets the first preset condition for turning on the external power discharge to determine whether to turn on the external power discharge function to start external power discharge. Specifically, when it is detected that the vehicle meets the first preset condition for turning on the external power discharge, the external power discharge function is turned on to start external power discharge.

[0115] Referring to Figure 4 , Figure 4 is the flowchart of the steps for detecting whether the vehicle meets the first preset condition for turning on the external power discharge provided by the embodiment of the present application, which is executed by the vehicle controller and includes but is not limited to steps S410 to S430.

[0116] Step S410: Detect whether the vehicle meets the initial condition for external power discharge;

[0117] Step S420: When it is detected that the vehicle meets the initial condition for external power discharge, detect whether the first available power of the vehicle's external power discharge is greater than the first power threshold, and detect whether the displayed remaining power of the power battery is greater than the first power threshold;

[0118] Step S430: When it is detected that the first available power for the vehicle to discharge externally is greater than the first power threshold and the displayed remaining power of the power battery is greater than the first power threshold, it is determined that the vehicle meets the first preset condition for enabling external power discharge.

[0119] In the embodiments of the present application, for the case where the vehicle is allowed to start the engine for external power discharge, the vehicle control unit will control the engine to start and control the engine and the generator to generate electricity. At this time, it is necessary to further detect whether the vehicle meets the initial conditions for external power discharge, whether the first available power for the vehicle to discharge externally is greater than the first power threshold, and whether the displayed remaining power of the power battery is greater than the first power threshold. If the vehicle meets the initial conditions for external power discharge, and the first available power for the vehicle to discharge externally is greater than the first power threshold, and the displayed remaining power of the power battery is greater than the first power threshold, it means that when the engine is started, that is, when the engine drives the generator to generate electricity, the power battery can meet the simultaneous continuous external power discharge of the internal high-voltage and low-voltage loads. At this time, the external power discharge function can be controlled to be enabled for continuous external power discharge. If the vehicle does not meet the initial conditions for external power discharge, or the first available power for the vehicle to discharge externally is not greater than the first power threshold, or the displayed remaining power of the power battery is not greater than the first power threshold, it means that when the engine is started, that is, when the engine drives the generator to generate electricity, the power battery cannot meet the simultaneous continuous external power discharge of the internal high-voltage and low-voltage loads. At this time, the external power discharge function can be controlled not to be enabled.

[0120] Step S230: When it is detected that the vehicle is not allowed to start the engine for external power discharge, detect whether the vehicle meets the second preset condition for enabling external power discharge.

[0121] In the embodiments of the present application, for the case where the vehicle is not allowed to start the engine for external power discharge, the vehicle control unit will not control the engine to start. At this time, it is necessary to further detect whether the vehicle meets the second preset condition for enabling external power discharge to determine whether to enable the external power discharge function to start external power discharge. Specifically, when it is detected that the vehicle meets the second preset condition for enabling external power discharge, the external power discharge function is enabled to start external power discharge.

[0122] Refer to Figure 5 , Figure 5 is the flowchart of the steps for detecting whether the vehicle meets the second preset condition for enabling external power discharge provided by the embodiments of the present application, which is executed by the vehicle control unit and includes but is not limited to steps S510 to S530.

[0123] Step S510: Detect whether the vehicle meets the initial conditions for external power discharge;

[0124] Step S520: When it is detected that the vehicle meets the initial conditions for external power discharge, detect whether the second available power for the vehicle's external power discharge is greater than the second power threshold, and detect whether the displayed remaining power of the power battery is greater than the discharge cut-off remaining power set by the human-machine interface;

[0125] Step S530: When it is detected that the second available power for the vehicle's external power discharge is greater than the second power threshold and the displayed remaining power of the power battery is greater than the discharge cut-off remaining power set by the human-machine interface, determine that the vehicle meets the second preset condition for enabling external power discharge.

[0126] In the embodiments of the present application, for the case where the engine is not allowed to start during the vehicle's external power discharge, the vehicle controller will not control the engine to start. At this time, it is necessary to further detect whether the vehicle meets the initial conditions for external power discharge, whether the second available power for the vehicle's external power discharge is greater than the second power threshold, and whether the displayed remaining power of the power battery is greater than the discharge cut-off remaining power set by the human-machine interface. If the vehicle meets the initial conditions for external power discharge, and the second available power for the vehicle's external power discharge is greater than the second power threshold, and the displayed remaining power of the power battery is greater than the discharge cut-off remaining power set by the human-machine interface, it means that the power battery can meet the simultaneous continuous external power discharge of the internal high- and low-voltage loads without starting the engine. At this time, the external power discharge function can be controlled to be enabled to continuously discharge externally. If the vehicle does not meet the initial conditions for external power discharge, or the second available power for the vehicle's external power discharge is not greater than the second power threshold, or the displayed remaining power of the power battery is not greater than the discharge cut-off remaining power set by the human-machine interface, it means that the power battery cannot meet the simultaneous continuous external power discharge of the internal high- and low-voltage loads without starting the engine. At this time, the external power discharge function can be controlled not to be enabled.

[0127] Refer to Figure 6 , Figure 6 is the flow chart of the steps for detecting whether the vehicle meets the initial conditions for external power discharge provided by the embodiments of the present application, which is executed by the vehicle controller and includes but is not limited to steps S610 to S630.

[0128] Step S610: Detect whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether the high-voltage power-on is completed, whether the DC-DC converter is working properly, and whether there is a fault in the on-vehicle charger / discharger;

[0129] Step S620: When it is detected that the vehicle gear is in the parking gear, the discharge gun is effectively connected, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, the high-voltage power-on is completed, the DC-DC converter is working properly, and there is no fault in the on-vehicle charger / discharger, it is determined that the vehicle meets the initial conditions for external power discharge;

[0130] Step S630: When it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or high-voltage power-on is not completed, or the DC-DC converter is not working properly, or there is a fault in the on-vehicle charger / discharger, it is determined that the vehicle does not meet the initial conditions for external discharging.

[0131] In the embodiments of the present application, by detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether high-voltage power-on is completed, whether the DC-DC converter is working properly, and whether there is a fault in the on-vehicle charger / discharger, it can be effectively determined whether the vehicle meets the initial conditions for external discharging.

[0132] Step S240: When it is detected that the vehicle does not meet the first preset condition, or it is detected that the vehicle does not meet the second preset condition, control the vehicle not to turn on the external discharging function.

[0133] In the embodiments of the present application, for the case where the vehicle is allowed to start the engine for external discharging, if it is detected that the vehicle does not meet the first preset condition, then control the vehicle not to turn on the external discharging function. Similarly, for the case where the vehicle is not allowed to start the engine for external discharging, if it is detected that the vehicle does not meet the second preset condition, then control the vehicle not to turn on the external discharging function.

[0134] Step S250: When it is detected that the vehicle meets the first preset condition, or it is detected that the vehicle meets the second preset condition, control the vehicle to turn on the external discharging function.

[0135] In the embodiments of the present application, for the case where the vehicle is allowed to start the engine for external discharging, if it is detected that the vehicle meets the first preset condition, then control the vehicle to turn on the external discharging function. Similarly, for the case where the vehicle is not allowed to start the engine for external discharging, if it is detected that the vehicle meets the second preset condition, then control the vehicle to turn on the external discharging function. Thus, the vehicle can be controlled to perform external discharging when the conditions for external discharging are met.

[0136] Step S260: After the external discharging function is turned on, detect whether the vehicle meets the conditions for stopping external discharging.

[0137] In the embodiments of the present application, after controlling to turn on the external discharging function, the vehicle continuously performs external discharging. During the process of the vehicle continuously performing external discharging, it can be detected in real time whether the vehicle meets the conditions for stopping external discharging. If it meets, then control to turn off the external discharging function in a timely manner to stop external discharging. If it does not meet the conditions for stopping external discharging, then the vehicle can be controlled to continuously perform external discharging.

[0138] Refer to Figure 7 , Figure 7It is a flowchart of steps for detecting whether a vehicle meets the condition for stopping external power discharge provided by an embodiment of the present application, including but not limited to steps S710 to S720.

[0139] Step S710: When the vehicle is allowed to start the engine for external power discharge and the engine and generator start to generate electricity, detect whether the first available power for the vehicle's external power discharge is less than the third power threshold, and detect whether the displayed remaining power of the power battery is less than the second power threshold.

[0140] Step S720: When it is detected that the first available power for the vehicle's external power discharge is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, determine that the vehicle meets the condition for stopping external power discharge.

[0141] In an embodiment of the present application, for the case where the vehicle is allowed to start the engine for external power discharge, the vehicle controller will control the engine to start and control the engine and generator to generate electricity. At this time, if it is detected that the vehicle meets the first preset condition for turning on external power discharge, the vehicle controller will control to turn on the external power discharge function to perform external power discharge. During the continuous external power discharge process, it can be effectively determined whether the vehicle meets the condition for stopping external power discharge by detecting whether the first available power for the vehicle's external power discharge is less than the third power threshold, and detecting whether the displayed remaining power of the power battery is less than the second power threshold. Specifically, if it is detected that the first available power for the vehicle's external power discharge is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, it is determined that the vehicle meets the condition for stopping external power discharge. At this time, the vehicle can be controlled to turn off the external power discharge function to stop external power discharge.

[0142] Refer to Figure 8 , Figure 8 It is a flowchart of the control method for external power discharge when the vehicle is allowed to start the engine for external power discharge provided by an embodiment of the present application, which is executed by the vehicle controller, including but not limited to steps S810 to S890.

[0143] Step S810: The vehicle is allowed to start the engine for external power discharge.

[0144] Step S820: Detect whether the vehicle meets the initial conditions for external power discharge.

[0145] Step S830: If it is detected that the vehicle meets the initial conditions for external power discharge, detect whether the first available power for the vehicle's external power discharge is greater than the first power threshold.

[0146] Step S840: When it is detected that the first available power for the vehicle's external power discharge is greater than the first power threshold, detect whether the displayed remaining power of the power battery is greater than the first power threshold.

[0147] Step S850: When it is detected that the displayed remaining power of the power battery is greater than the first power threshold, control the vehicle to turn on the external power discharge function to discharge externally.

[0148] Step S860: If it is detected that the vehicle does not meet the initial conditions for external power discharge, or the first available power for the vehicle to discharge externally is not greater than the first power threshold, or the displayed remaining power of the power battery is not greater than the first power threshold, then control the vehicle not to turn on the external power discharge function to not discharge externally.

[0149] Step S870: Detect whether the first available power for the vehicle to discharge externally is less than the third power threshold.

[0150] Step S880: Detect whether the displayed remaining power of the power battery is less than the second power threshold.

[0151] Step S890: If it is detected that the first available power for the vehicle to discharge externally is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, then control the vehicle to turn off the external power discharge function to stop external power discharge. If it is detected that the first available power for the vehicle to discharge externally is not less than the third power threshold and the displayed remaining power of the power battery is not less than the second power threshold, then return to Step S850.

[0152] In the embodiment of the present application, for the case where the engine is allowed to start during vehicle-to-grid (V2G) power discharge, after receiving the instruction to turn on V2G power discharge, the vehicle control unit (VCU) will first control the engine to start to drive the generator to generate electricity. Then, it will further determine whether the vehicle meets the first preset condition for turning on V2G power discharge. Specifically, it will detect whether the vehicle meets the initial condition for V2G power discharge, whether the first available power for V2G power discharge of the vehicle is greater than the first power threshold, and whether the displayed remaining power of the power battery is greater than the first power threshold. If the vehicle meets the initial condition for V2G power discharge, the first available power for V2G power discharge of the vehicle is greater than the first power threshold, and the displayed remaining power of the power battery is greater than the first power threshold, then the VCU can control to turn on the V2G power discharge function to continuously discharge power externally. If the vehicle does not meet the initial condition for V2G power discharge, or the first available power for V2G power discharge of the vehicle is not greater than the first power threshold, or the displayed remaining power of the power battery is not greater than the first power threshold, then the VCU can control not to turn on the V2G power discharge function. After turning on the V2G power discharge function, it will detect whether the first available power for V2G power discharge of the vehicle is less than the third power threshold and whether the displayed remaining power of the power battery is less than the second power threshold to effectively determine whether the vehicle meets the condition for stopping V2G power discharge. If the first available power for V2G power discharge of the vehicle is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, then the VCU will control to turn off the V2G power discharge function to stop external power discharge. If the first available power for V2G power discharge of the vehicle is not less than the third power threshold and the displayed remaining power of the power battery is not less than the second power threshold, then it will not stop V2G power discharge and continue to detect whether the vehicle meets the condition for stopping V2G power discharge. Thus, in the case where the engine is allowed to start during V2G power discharge, by precisely controlling the V2G power discharge process, it can meet the personalized power consumption needs of users in different power consumption scenarios and different vehicle states, ensure power supply continuity, and improve the power consumption experience.

[0153] In the first embodiment of the present application, referring to Figure 9 , Figure 9 is the flowchart of the steps for calculating the first available power for vehicle-to-grid (V2G) power discharge provided by the embodiment of the present application, which is executed by the vehicle control unit (VCU) and includes, but is not limited to, steps S910 to S940.

[0154] Step S910: Obtain the power generation power of the generator and the peak power after the power discharge limit of the power battery.

[0155] Step S920: Obtain the power consumption of the air-conditioning compressor and the power consumption of the heating resistor, and use the sum of the power consumption of the air-conditioning compressor and the power consumption of the heating resistor as the total power consumption of the air conditioner.

[0156] Step S930: Obtain the voltage and current on the high-voltage side of the DC-DC converter, and multiply the voltage and current on the high-voltage side of the DC-DC converter to obtain the power consumption of the low-voltage accessories.

[0157] Step S940: After adding the power generation power of the generator to the peak power, subtract the total power consumption of the air conditioner and the power consumption of the low-voltage accessories to obtain the first available power for the vehicle to discharge externally.

[0158] In the embodiment of the present application, for the case where the vehicle is allowed to start the engine for external discharge, the vehicle controller will control the start of the engine and the power generation of the generator. At this time, by adding the power generation power of the generator to the peak power after the external discharge limit of the power battery, and then subtracting the total power consumption of the air conditioner and the power consumption of the low-voltage accessories, the first available power for the vehicle to discharge externally can be obtained. Thus, for the case where the vehicle is allowed to start the engine for external discharge, by comparing the first available power with the first power threshold, and when the first available power is greater than the first power threshold, that is, the power battery can meet the simultaneous continuous external discharge of the internal high- and low-voltage loads and other external discharge conditions are met, the external discharge function can be controlled to be turned on in a timely manner to start continuous external discharge. And by comparing the first available power with the third power threshold, and when the first available power is less than the first power threshold, that is, the power battery cannot meet the simultaneous continuous external discharge of the internal high- and low-voltage loads, the external discharge function can be controlled to be turned off in a timely manner to stop external discharge.

[0159] Refer to Figure 10 , Figure 10 is another flowchart of steps for detecting whether the vehicle meets the conditions for stopping external discharge provided by the embodiment of the present application, including but not limited to steps S1010 to S1020.

[0160] Step S1010: When the vehicle is not allowed to start the engine for external discharge, detect whether the second available power for the vehicle to discharge externally is less than the fourth power threshold, and detect whether the displayed remaining power of the power battery is less than the discharge cut-off remaining power set by the human-machine interface;

[0161] Step S1020: When it is detected that the second available power for the vehicle to discharge externally is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the discharge cut-off remaining power set by the human-machine interface, determine that the vehicle meets the conditions for stopping external discharge.

[0162] In the embodiments of the present application, when the vehicle controller does not allow the engine to start during external power discharge of the vehicle, the vehicle controller will not control the engine to start. At this time, if it is detected that the vehicle meets the second preset condition for enabling external power discharge, the vehicle controller will control to enable the external power discharge function to discharge externally. During the continuous external power discharge process, it is possible to effectively determine whether the vehicle meets the condition for stopping external power discharge by detecting whether the second available power of the vehicle's external power discharge is less than the fourth power threshold and detecting whether the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface. Specifically, if it is detected that the second available power of the vehicle's external power discharge is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface, it can be determined that the vehicle meets the condition for stopping external power discharge. At this time, the vehicle can be controlled to turn off the external power discharge function to stop external power discharge.

[0163] Referring to Figure 11 , Figure 11 is a flowchart of the control method for external power discharge of a vehicle when the engine is not allowed to start during external power discharge of the vehicle provided by the embodiments of the present application, which is executed by the vehicle controller and includes, but is not limited to, steps S1110 to S1190.

[0164] Step S1110, the engine is not allowed to start during external power discharge of the vehicle;

[0165] Step S1120, detect whether the vehicle meets the initial condition for external power discharge;

[0166] Step S1130, if it is detected that the vehicle meets the initial condition for external power discharge, detect whether the second available power of the vehicle's external power discharge is greater than the second power threshold;

[0167] Step S1140, if it is detected that the second available power of the vehicle's external power discharge is greater than the second power threshold, detect whether the displayed remaining power of the power battery is greater than the remaining power at the discharge cut-off set by the human-machine interface;

[0168] Step S1150, if it is detected that the displayed remaining power of the power battery is greater than the remaining power at the discharge cut-off set by the human-machine interface, control the vehicle to enable the external power discharge function to discharge externally;

[0169] Step S1160, if it is detected that the vehicle does not meet the initial condition for external power discharge, or the second available power of the vehicle's external power discharge is not greater than the second power threshold, or the displayed remaining power of the power battery is not greater than the remaining power at the discharge cut-off set by the human-machine interface, then control the vehicle not to enable the external power discharge function to not discharge externally;

[0170] Step S1170, detect whether the second available power of the vehicle's external power discharge is less than the fourth power threshold;

[0171] Step S1180, detect whether the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface;

[0172] Step S1190, if it is detected that the second available power for the vehicle to discharge externally is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface, control the vehicle to turn off the external discharge function to stop external discharge. If it is detected that the second available power for the vehicle to discharge externally is not less than the fourth power threshold and the displayed remaining power of the power battery is not less than the remaining power at the discharge cut-off set by the human-machine interface, then return to Step S1150.

[0173] In the embodiment of the present application, for the case where the engine is not allowed to start during external discharge of the vehicle, after receiving the instruction to turn on external discharge, the vehicle controller will not first control the engine to start. Then, it will further determine whether the vehicle meets the second preset condition for turning on external discharge. Specifically, it detects whether the vehicle meets the initial conditions for external discharge, whether the second available power for the vehicle to discharge externally is greater than the second power threshold, and whether the displayed remaining power of the power battery is greater than the remaining power at the discharge cut-off set by the human-machine interface. If the vehicle meets the initial conditions for external discharge, and the second available power for the vehicle to discharge externally is greater than the second power threshold, and the displayed remaining power of the power battery is greater than the remaining power at the discharge cut-off set by the human-machine interface, at this time, the external discharge function can be controlled to turn on to continue external discharge. If the vehicle does not meet the initial conditions for external discharge, or the second available power for the vehicle to discharge externally is not greater than the second power threshold, or the displayed remaining power of the power battery is not greater than the remaining power at the discharge cut-off set by the human-machine interface, at this time, the external discharge function can be controlled not to turn on. After the external discharge function is turned on, it is detected whether the second available power for the vehicle to discharge externally is less than the fourth power threshold and whether the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface. If the second available power for the vehicle to discharge externally is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface, then control to turn off the external discharge function to stop external discharge. If the second available power for the vehicle to discharge externally is not less than the fourth power threshold and the displayed remaining power of the power battery is not less than the remaining power at the discharge cut-off set by the human-machine interface, then external discharge is not stopped, and it continues to be detected whether the vehicle meets the conditions for stopping external discharge. Thus, in the case where the engine is not allowed to start during external discharge of the vehicle, through precise control of the external discharge process, the personalized power consumption needs of users in different power consumption scenarios and different vehicle states can be met, ensuring power supply continuity and enhancing the power consumption experience.

[0174] Refer to Figure 12 , Figure 12It is a flowchart of steps for calculating the second available power of the vehicle's external power discharge provided by an embodiment of the present application, which is executed by the vehicle controller and includes, but is not limited to, steps S1210 to S1240.

[0175] Step S1210: Obtain the peak power after the external power discharge limit of the power battery.

[0176] Step S1220: Obtain the power consumption of the air-conditioning compressor and the power consumption of the heating resistor, and take the sum of the power consumption of the air-conditioning compressor and the power consumption of the heating resistor as the total power consumption of the air-conditioning.

[0177] Step S1230: Obtain the voltage and current on the high-voltage side of the DC-DC converter, and multiply the voltage and current on the high-voltage side of the DC-DC converter to obtain the power consumption of the low-voltage accessories.

[0178] Step S1240: Subtract the total power consumption of the air-conditioning and the power consumption of the low-voltage accessories from the peak power to obtain the second available power of the vehicle's external power discharge.

[0179] In the embodiment of the present application, for the case where the engine is not allowed to start during the vehicle's external power discharge, the second available power of the vehicle's external power discharge can be obtained by subtracting the total power consumption of the air-conditioning and the power consumption of the low-voltage accessories from the peak power after the external power discharge limit of the power battery. Thus, for the case where the engine is not allowed to start during the vehicle's external power discharge, by comparing the second available power with the second power threshold, and when the first available power is greater than the second power threshold, that is, the power battery can meet the simultaneous continuous external power discharge of the internal high- and low-voltage loads and other external power discharge conditions are met, the external power discharge function can be timely controlled to be turned on to start continuous external power discharge. And by comparing the second available power with the fourth power threshold, and when the second available power is less than the fourth power threshold, that is, the power battery cannot meet the simultaneous continuous external power discharge of the internal high- and low-voltage loads, the external power discharge function can be timely controlled to be turned off to stop the external power discharge.

[0180] In an embodiment of the present application, when selecting the fourth power threshold, it is necessary to ensure that the power battery has enough power to start the engine to meet the user's next vehicle usage requirement. At the same time, it is necessary to ensure that it can cover the maximum power consumption allowed by the discharge gun to ensure that the user will not interrupt power consumption due to load regulation or fluctuations causing the charger / discharger to be frequently overloaded. The second power threshold is offset upward by a certain amount based on the fourth power threshold, that is, the second power threshold is higher than the fourth power threshold, which can prevent the discharge function from crashing. When selecting the third power threshold, since the prerequisite is that the vehicle judges that the engine is allowed to start, and the vehicle controller judges that the power and state of charge (SOC) conditions for starting the engine are higher than the conditions for stopping external discharge, that is, the engine is started in advance before discharging stops to ensure that discharging will not be interrupted due to low battery power. Therefore, it only needs to ensure that it can cover the maximum power consumption allowed by the discharge gun. When selecting the first power threshold, a certain offset can be added to the third power threshold, that is, the first power threshold is greater than the third power threshold, which can prevent the discharge function from crashing in the scenario where the power battery power or discharge power is low. Just after entering the discharge and the engine has not started to output power, it reaches the third power threshold for stopping discharge. When selecting the second state of charge threshold, since it uses the displayed state of charge (SOC) for judgment and the user can directly see it on the instrument panel, a value of 0 or above can be selected. The key is to ensure that the user will not feel that the power is already very low and still discharging externally, making the user feel insecure. At the same time, it is necessary to ensure that it is not set too high, resulting in complaints that the vehicle system still has enough energy but restricts the user's power consumption. When selecting the first state of charge threshold, a certain offset can be made based on the second state of charge threshold, that is, the first state of charge threshold is greater than the second state of charge threshold, which also prevents the discharge function from crashing.

[0181] Refer to Figure 13 , Figure 13 FIG. is another flowchart of steps for detecting whether a vehicle meets the condition for stopping external discharge provided by an embodiment of the present application, including but not limited to steps S1310 to S1330.

[0182] Step S1310: Detect whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether a request to stop external discharge is received, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether there is a fault in the on-vehicle charger / discharger, and whether the external discharge duration reaches the preset discharge duration;

[0183] Step S1320: When it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or a request to stop external discharge is received, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or there is a fault in the on-vehicle charger / discharger, or the external discharge duration reaches the preset discharge duration, it is determined that the vehicle meets the condition for stopping external discharge;

[0184] Step S1330: When it is detected that the vehicle gear is in the parking gear, the discharge gun is not effectively connected, no stop external discharge request is received, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, the on-vehicle charger / discharger has no fault, and the external discharge duration has not reached the preset duration, it is determined that the vehicle does not meet the condition for stopping external discharge.

[0185] In the embodiment of the present application, by detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether a stop external discharge request is received, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether the on-vehicle charger / discharger has a fault, and whether the external discharge duration reaches the preset discharge duration, it can be effectively determined whether the vehicle meets the condition for stopping external discharge. Specifically, when it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or a stop external discharge request is received, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or the on-vehicle charger / discharger has a fault, or the external discharge duration reaches the preset discharge duration, it can be determined that the vehicle meets the condition for stopping external discharge. At this time, the vehicle control unit will control to turn off the external discharge function to stop external discharge. When it is detected that the vehicle gear is in the parking gear, the discharge gun is not effectively connected, no stop external discharge request is received, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, the on-vehicle charger / discharger has no fault, and the external discharge duration has not reached the preset duration, it is determined that the vehicle does not meet the condition for stopping external discharge. At this time, the vehicle control unit will not control to turn off the external discharge function, but will continue to judge whether the vehicle meets the condition for stopping external discharge, so as to be able to timely control to turn off the external discharge function to stop external discharge when it is determined that the vehicle meets the condition for stopping external discharge.

[0186] Step S270: When it is detected that the vehicle meets the condition for stopping external discharge, control the vehicle to turn off the external discharge function; when it is detected that the vehicle does not meet the condition for stopping external discharge, return to Step S260.

[0187] In the embodiment of the present application, after the vehicle control unit controls to turn on the external discharge function to start external discharge, the vehicle control unit will continuously detect whether the vehicle meets the condition for stopping external discharge. If it meets the condition, it will timely control the vehicle to turn off the external discharge function to stop external discharge.

[0188] The embodiment of the present application also provides a hybrid vehicle, which is used to execute the external discharge control method provided in any embodiment of the present application.

[0189] In the embodiments of the present application, the hybrid vehicle can execute the external power discharge control method provided in any embodiment of the present application. By precisely controlling the external power discharge process, it can meet the personalized power consumption needs of users in different power consumption scenarios and different vehicle states, ensure power supply continuity, and improve the power consumption experience.

[0190] The embodiments of the present application also provide an electronic device. The electronic device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the above-mentioned control method for the vehicle to discharge externally. The electronic device can be any intelligent terminal including a tablet computer, an in-vehicle computer, etc.

[0191] Please refer to Figure 14 , Figure 14 which is a schematic diagram of the hardware structure of the electronic device provided by the embodiments of the present application. The electronic device includes:

[0192] A processor 1401, which can be implemented by using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided by the embodiments of the present application;

[0193] A memory 1402, which can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc. The memory 1402 can store an operating system and other application programs. When implementing the technical solutions provided by the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1402, and the processor 1401 is used to call and execute the control method for the vehicle to discharge externally in the embodiments of the present application;

[0194] An input / output interface 1403, which is used to implement information input and output;

[0195] A communication interface 1404, which is used to implement communication and interaction between this device and other devices. It can implement communication through a wired method (such as USB, network cable, etc.) or through a wireless method (such as a mobile network, WIFI, Bluetooth, etc.);

[0196] A bus 1405, which transmits information between the various components of the device (such as the processor 1401, the memory 1402, the input / output interface 1403, and the communication interface 1404);

[0197] Among them, the processor 1401, the memory 1402, the input / output interface 1403, and the communication interface 1404 are communicatively connected to each other inside the device through the bus 1405.

[0198] The embodiment of the present application also provides a storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned control method for external power discharge of the vehicle is implemented.

[0199] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely provided with respect to the processor, and these remote memories may be connected to the processor through a network. Examples of the above-mentioned network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0200] The embodiments described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art will know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0201] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than those shown in the figures, or combine certain steps, or different steps.

[0202] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0203] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices can be implemented as software, firmware, hardware, and appropriate combinations thereof.

[0204] In the description of this application and the above-mentioned accompanying drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" 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.

[0205] It should be understood that in this application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (one) of the following" or its similar expressions refer to any combination of these items, including any combination of single items (ones) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0206] In several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above-mentioned division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms.

[0207] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0208] In addition, in each embodiment of the present application, the functional units may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0209] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store programs.

[0210] The preferred embodiments of the embodiments of the present application have been described above with reference to the accompanying drawings. This does not limit the scope of the rights of the embodiments of the present application. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the rights of the embodiments of the present application.

Claims

1. A control method for external power discharge of a vehicle, characterized in that, The method includes: In response to an external discharge start command, detecting whether the vehicle allows starting the engine for external discharge; When it is detected that the vehicle allows starting the engine for external discharge, detecting whether the vehicle meets the first preset condition for starting external discharge; When it is detected that the vehicle does not allow starting the engine for external discharge, detecting whether the vehicle meets the second preset condition for starting external discharge; When it is detected that the vehicle meets the first preset condition, or it is detected that the vehicle meets the second preset condition, controlling the vehicle to start the external discharge function; After the external discharge function is started, detecting whether the vehicle meets the condition for stopping external discharge; When it is detected that the vehicle meets the condition for stopping external discharge, controlling the vehicle to turn off the external discharge function.

2. The method according to claim 1, characterized in that, Detecting whether the vehicle allows starting the engine for external discharge includes: Detecting whether the human-machine interface has set that the vehicle allows starting the engine for external discharge, whether there is a starting failure of the engine or generator, and whether the vehicle fuel has reached the low fuel level alarm; When it is detected that the human-machine interface has set that the vehicle allows starting the engine for external discharge, and there is no starting failure of the engine and generator, and the vehicle fuel has not reached the low fuel level alarm, it is determined that the vehicle allows starting the engine for external discharge; When it is detected that the human-machine interface sets that the vehicle does not allow starting the engine for external discharge, or there is a starting failure of the engine or generator, or the vehicle fuel has reached the low fuel level alarm, it is determined that the vehicle does not allow starting the engine for external discharge.

3. The method according to claim 1, characterized in that, Detecting whether the vehicle meets the first preset condition for starting external discharge includes: Detecting whether the vehicle meets the initial condition for external discharge; When it is detected that the vehicle meets the initial condition for external discharge, detecting whether the first available power of the vehicle for external discharge is greater than the first power threshold, and detecting whether the displayed remaining power of the power battery is greater than the first power threshold; When it is detected that the first available power of the vehicle for external discharge is greater than the first power threshold, and the displayed remaining power of the power battery is greater than the first power threshold, it is determined that the vehicle meets the first preset condition for starting external discharge.

4. The method according to claim 1, characterized in that, Detecting whether the vehicle meets the second preset condition for starting external discharge includes: Detecting whether the vehicle meets the initial condition for external discharge; When it is detected that the vehicle meets the initial condition for external discharge, detecting whether the second available power of the vehicle for external discharge is greater than the second power threshold, and detecting whether the displayed remaining power of the power battery is greater than the remaining discharge cut-off power set by the human-machine interface; When it is detected that the second available power of the vehicle for external discharge is greater than the second power threshold, and the displayed remaining power of the power battery is greater than the remaining discharge cut-off power set by the human-machine interface, it is determined that the vehicle meets the second preset condition for starting external discharge.

5. The method according to claim 3 or 4, characterized in that, Detecting whether the vehicle meets the initial condition for external discharge includes: Detecting whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether the high-voltage power-on is completed, whether the DC-DC converter is working properly, and whether there is a fault in the on-board charger / discharger. When it is detected that the vehicle gear is in the parking gear, the discharge gun is effectively connected, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, high-voltage power-on is completed, the DC-DC converter is working normally, and the on-vehicle charger / discharger has no fault, it is determined that the vehicle meets the initial conditions for external discharging; When it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or high-voltage power-on is not completed, or the DC-DC converter is not working normally, or the on-vehicle charger / discharger has a fault, it is determined that the vehicle does not meet the initial conditions for external discharging.

6. The method according to claim 1, characterized in that, Detect whether the vehicle meets the conditions for stopping external discharging, including: When the vehicle is allowed to start the engine for external discharging and the engine and generator start to generate electricity, detect whether the first available power for the vehicle's external discharging is less than the third power threshold, and detect whether the displayed remaining power of the power battery is less than the second power threshold; When it is detected that the first available power for the vehicle's external discharging is less than the third power threshold, or the displayed remaining power of the power battery is less than the second power threshold, it is determined that the vehicle meets the conditions for stopping external discharging.

7. The method according to claim 1, characterized in that, Detect whether the vehicle meets the conditions for stopping external discharging, including: When the vehicle is not allowed to start the engine for external discharging, detect whether the second available power for the vehicle's external discharging is less than the fourth power threshold, and detect whether the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface; When it is detected that the second available power for the vehicle's external discharging is less than the fourth power threshold, or the displayed remaining power of the power battery is less than the remaining power at the discharge cut-off set by the human-machine interface, it is determined that the vehicle meets the conditions for stopping external discharging.

8. The method according to claim 1, characterized in that, Detect whether the vehicle meets the conditions for stopping external discharging, including: Detect whether the vehicle gear is in the parking gear, whether the discharge gun is effectively connected, whether a request to stop external discharging is received, whether the temperature of the discharge terminal is normal, whether there is a system fault affecting high-voltage power-on, whether the on-vehicle charger / discharger has a fault, and whether the external discharging duration has reached the preset discharging duration; When it is detected that the vehicle gear is not in the parking gear, or the discharge gun is not effectively connected, or a request to stop external discharging is received, or the temperature of the discharge terminal is abnormal, or there is a system fault affecting high-voltage power-on, or the on-vehicle charger / discharger has a fault, or the external discharging duration has reached the preset discharging duration, it is determined that the vehicle meets the conditions for stopping external discharging; When it is detected that the vehicle gear is in the parking gear, the discharge gun is not effectively connected, no request to stop external discharging is received, the temperature of the discharge terminal is normal, there is no system fault affecting high-voltage power-on, the on-vehicle charger / discharger has no fault, and the external discharging duration has not reached the preset duration, it is determined that the vehicle does not meet the conditions for stopping external discharging.

9. The method according to claim 3 or 6, characterized in that, The first available power for the vehicle's external discharging is calculated through the following steps: Obtain the power generation power of the generator and the peak power after the external discharging of the power battery is restricted; Obtain the power consumption of the air-conditioning compressor and the power consumption of the thermal resistor, and use the sum of the power consumption of the air-conditioning compressor and the power consumption of the thermal resistor as the total power consumption of the air-conditioning; Obtain the voltage and current of the high-voltage side of the DC-DC converter, and multiply the voltage and current of the high-voltage side of the DC-DC converter to obtain the power consumed by the low-voltage accessory; After adding the power generated by the generator and the peak power, subtract the total power consumed by the air conditioner and then subtract the power consumed by the low-voltage accessory to obtain the first available power for external power discharge of the vehicle.

10. The method according to claim 4 or 7, characterized in that, The second available power for external power discharge of the vehicle is calculated through the following steps: Obtain the peak power after the external power discharge limit of the power battery; Obtain the power consumed by the air conditioner compressor and the power consumed by the thermal resistor, and use the sum of the power consumed by the air conditioner compressor and the power consumed by the thermal resistor as the total power consumed by the air conditioner; Obtain the voltage and current of the high-voltage side of the DC-DC converter, and multiply the voltage and current of the high-voltage side of the DC-DC converter to obtain the power consumed by the low-voltage accessory; Subtract the total power consumed by the air conditioner and then subtract the power consumed by the low-voltage accessory from the peak power to obtain the second available power for external power discharge of the vehicle.

11. A control system for external power discharge of an automobile, characterized in that, Including: A human-machine interaction control unit, a power battery management unit, an engine control unit, a generator control unit, a vehicle controller, an on-vehicle charge and discharge control unit, and an air conditioner control unit; the human-machine interaction control unit, the power battery management unit, the engine control unit, the generator control unit, the on-vehicle charge and discharge control unit, and the air conditioner control unit are all connected to the vehicle controller; The human-machine interaction control unit is used to receive the discharge condition information set by the human-machine interaction interface and upload it to the vehicle controller, and the discharge condition information includes allowing the engine to start for external power discharge, not allowing the engine to start for external power discharge, the remaining power until the end of discharge, and the preset discharge duration; The power battery management unit is used to detect and obtain the power battery status information and upload it to the vehicle controller, and the power battery status information includes the displayed remaining power of the power battery and the peak power after the external power discharge limit of the power battery; The engine control unit is used to detect and obtain the engine status information and upload it to the vehicle controller; The generator control unit is used to detect and obtain the generator status information and upload it to the vehicle controller; The on-vehicle charge and discharge control unit includes an AC-DC inverter unit and a DC-DC converter, and the on-vehicle charge and discharge control is used to upload the connection status of the discharge gun, the status of the on-vehicle charger, the working status of the DC-DC converter, and the voltage and current of the high-voltage side of the DC-DC converter to the vehicle controller; The air conditioner control unit is used to upload the power consumed by the air conditioner compressor and the power consumed by the thermal resistor to the vehicle controller; The vehicle controller is used to receive the information sent by the human-machine interaction control unit, the power battery management unit, the engine control unit, the generator control unit, the on-vehicle charge and discharge control unit, and the air conditioner control unit, and execute the method according to any one of claims 1-10.

12. The system according to claim 11, characterized in that, The human-machine interaction control unit includes an external power discharge request button interface, a remaining power setting interface until the end of discharge, an external power discharge allowing engine start switch interface, and a preset discharge duration setting interface.

13. A hybrid vehicle, characterized in that, The hybrid vehicle is used to execute the method described in any one of claims 1-10.

14. An electronic device, characterized in that, The electronic device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the method described in any one of claims 1 to 10 is implemented.

15. A computer-readable storage medium, the storage medium stores a computer program, characterized in that, When the computer program is executed by the processor, the method described in any one of claims 1 to 10 is implemented.

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