CN114954015A - Method, device, equipment and medium for controlling power on and power off of electric automobile - Google Patents

Method, device, equipment and medium for controlling power on and power off of electric automobile Download PDF

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Publication number
CN114954015A
CN114954015A CN202210550798.1A CN202210550798A CN114954015A CN 114954015 A CN114954015 A CN 114954015A CN 202210550798 A CN202210550798 A CN 202210550798A CN 114954015 A CN114954015 A CN 114954015A
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Prior art keywords
power
mode
electric automobile
charging
driving
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CN202210550798.1A
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Chinese (zh)
Inventor
卢素芬
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Hozon New Energy Automobile Co Ltd
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Hozon New Energy Automobile Co Ltd
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Priority to CN202210550798.1A priority Critical patent/CN114954015A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a power-on and power-off control method, a device, equipment and a medium of an electric automobile, wherein in the method, when the electric automobile is in a first power-on and power-off mode, if the fact that the connection of a high-voltage relay of the electric automobile is disconnected and the connection state of a charging wire accords with a first preset state corresponding to the first power-on and power-off mode is detected, the electric automobile is controlled to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode; therefore, the switching from the driving power-on and power-off mode to the charging power-on and power-off mode and the switching from the charging power-on and power-off mode to the driving power-on and power-off mode are realized.

Description

Method, device, equipment and medium for controlling power on and power off of electric automobile
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a method, a device, equipment and a medium for controlling the power-on and power-off of an electric automobile.
Background
Electric automobile includes hybrid electric automobile and pure electric automobile, compares with traditional automobile, and electric automobile has a set of high-voltage drive system and a set of high-voltage accessories, and wherein high-voltage drive system includes power battery, driving motor and high-voltage distribution box etc. and high-voltage accessories includes direct current converter (DC-to-DC converter, DCDC), electric heater ((PTC) and air condition compressor etc..
The sudden change phenomenon of high voltage and heavy current exists in the power-on and power-off processes of a high-voltage driving system of an electric automobile, the power-on and power-off time sequence is of great importance, faults such as high-voltage contact ignition ablation, high-voltage fuse blowout and the like can be caused by improper time sequence, even the high-voltage contacts can be adhered together in serious conditions, the high voltage can not be cut off, and the safety of the high-voltage driving system is reduced and the service life of the high-voltage driving system is shortened.
In order to ensure the safety of the high-voltage driving system, the prior art only considers the power-on and power-off control in the driving power-on and power-off mode or the power-on and power-off control in the charging power-on and power-off mode, but does not consider how to switch between the driving power-on and power-off mode and the charging power-on and power-off mode, so that the overall power-on and power-off control is not perfect, and the safety of the whole high-voltage driving system of the electric automobile is not high.
Therefore, how to realize the whole vehicle power-on and power-off control of the electric vehicle and improve the safety of the whole vehicle high-voltage driving system become a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a power-on and power-off control method, device, equipment and medium for an electric automobile, which are used for solving the problem of low safety of a whole automobile high-voltage driving system in the prior art.
The invention provides a power-on and power-off control method for an electric automobile, which comprises the following steps:
when the electric automobile is in a first power-on and power-off mode, if the fact that the high-voltage relay of the electric automobile is disconnected and the connection state of a charging wire meets a first preset state corresponding to the first power-on and power-off mode is detected, the electric automobile is controlled to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
Further, if the first power-on/power-off mode is a driving power-on/power-off mode, the first preset state is a connection state.
Further, if the first power-up and power-down mode is the charging power-up and power-down mode, the first preset state is the off state.
Further, if the first power-on/off mode is the charging power-on/off mode, if it is detected that the high-voltage relay of the electric vehicle is disconnected and the connection state of the charging wire conforms to a first preset state corresponding to the first power-on/off mode, controlling the electric vehicle to switch from the first power-on/off mode to the second power-on/off mode includes:
and if the high-voltage relay of the electric automobile is detected to be disconnected, the charging wire is in a disconnected state, and the key is in a key power-on state, controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
Further, if the first power-up and power-down mode is a driving power-up and power-down mode, after the electric vehicle is controlled to switch from the first power-up and power-down mode to a second power-up and power-down mode, the method further includes:
controlling the electric automobile to enter a charging power-on mode and start to be powered on;
if the charging completion or the charging stop fault is detected, controlling the electric automobile to enter a charging power-down mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the charging and discharging of the electric automobile are completed if the high-voltage relay is detected to be disconnected within a first preset time period or the detection time reaches the first preset time period.
Further, if the first power-up/down mode is a charging power-up/down mode, after the controlling the electric vehicle to switch from the first power-up/down mode to a second power-up/down mode, the method further includes:
controlling the electric automobile to enter a driving power-on mode, determining whether driving power-on is completed or not, and starting driving if the driving power-on is completed;
if the key state of the electric automobile is detected to be in a key power-off state or the electric automobile is powered off due to faults, controlling the electric automobile to enter a driving power-off mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the running of the electric automobile is finished if the high-voltage relay is detected to be disconnected within a second preset time period or the detection time reaches the second preset time period.
Further, the determining whether the vehicle is powered on includes:
detecting whether the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are enabled to be completed within third preset time lengths corresponding to the high-voltage relay, the direct-current converter and the heat management function respectively;
and if so, determining that the running of the electric automobile is powered on.
Further, the method further comprises:
if not, determining that the electric automobile enters a fault mode and carrying out fault detection.
Accordingly, the present invention provides an electric vehicle power on/off control device, comprising:
the detection module is used for triggering the control module if the high-voltage relay of the electric automobile is detected to be disconnected and the connection state of a charging wire meets a first preset state corresponding to a first power-up and power-down mode when the electric automobile is in the first power-up and power-down mode;
the control module is used for controlling the electric automobile to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
Further, the detection module is specifically configured to trigger the control module if it is detected that the high-voltage relay of the electric vehicle is disconnected, the charging line is disconnected, and the key is powered on;
the control module is specifically used for controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
Further, the control module is further configured to control the electric vehicle to enter a charging power-on mode and start to power on;
the detection module is further used for controlling the electric automobile to enter a charging and discharging mode if the charging completion or the charging stop fault is detected;
the control module is also used for controlling the high-voltage relay of the electric automobile to be disconnected and start to detect;
the detection module is further configured to determine that charging and discharging of the electric vehicle are completed if it is detected that the high-voltage relay is disconnected in a first preset time period or the detection time reaches the first preset time period.
Further, the control module is also used for controlling the electric automobile to enter a driving power-on mode;
the detection module is further used for determining whether the running is completed or not after the running is completed, starting the running if the completion is completed, and triggering the control module if the key state of the electric automobile is detected to be in a key power-off state or the electric automobile is failed and powered off;
the control module is also used for controlling the electric automobile to enter a driving power-off mode, controlling the high-voltage relay of the electric automobile to be disconnected and starting detection;
the detection module is further used for determining that the running of the electric automobile is finished when the high-voltage relay is disconnected within a second preset time period or the detection time reaches the second preset time period.
Further, the detection module is specifically configured to detect whether the high-voltage relay, the dc converter, the thermal management function, and the front and rear driving motors are enabled within third preset durations respectively corresponding to the high-voltage relay, the dc converter, the thermal management function, and the front and rear driving motors; and if so, determining that the running of the electric automobile is powered on.
Further, the detection module is further configured to determine that the electric vehicle enters a fault mode and perform fault detection if the detection of the high-voltage relay, the dc converter, the thermal management function and the enabling of the front and rear driving motors are not completed within third preset durations respectively corresponding to the high-voltage relay, the dc converter, the thermal management function and the front and rear driving motors.
Accordingly, the present invention provides an electronic device comprising a processor and a memory, the memory being configured to store program instructions, the processor being configured to implement the steps of any of the above-described power-on and power-off control methods for an electric vehicle when executing a computer program stored in the memory.
Accordingly, the present invention provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of any one of the above-described power-on and power-off control methods for an electric vehicle.
The invention provides a power-on and power-off control method, a device, equipment and a medium for an electric automobile, wherein in the method, when the electric automobile is in a first power-on and power-off mode, if the fact that the connection of a high-voltage relay of the electric automobile is disconnected and the connection state of a charging wire accords with a first preset state corresponding to the first power-on and power-off mode is detected, the electric automobile is controlled to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode; therefore, the switching from the driving power-on and power-off mode to the charging power-on and power-off mode and the switching from the charging power-on and power-off mode to the driving power-on and power-off mode are realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a powertrain of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a process schematic diagram of a power-on and power-off control method for an electric vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic process diagram of another power-on and power-off control method for an electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic process diagram of a power-on and power-off control method in a charging power-on and power-off mode according to an embodiment of the present invention;
fig. 5 is a schematic process diagram of a power-on and power-off control method in a power-on and power-off mode of a vehicle according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electric vehicle power-on and power-off control device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment of the present invention, the electric vehicle includes a front wheel driving System, a rear wheel driving System, a Power battery System, a vehicle controller (VMS), an electric heater, an Air conditioner Compressor (EACP), a high voltage Distribution Unit (PDU), an On Board Charger (OBC), a Dc converter, an Ac charging Port (Ac Charge Port), and a Dc charging Port (Dc Charge Port).
Fig. 1 is a schematic diagram of a power assembly scheme of an electric vehicle according to an embodiment of the present invention, and as shown in fig. 1, a front wheel driving system includes a speed reducer, a front drive Motor (F-Motor), a front drive Motor inverter, and a front drive axle; the rear wheel driving System comprises a rear driving Motor (R-Motor), a rear driving Motor inverter and a speed reduction differential System, and the power Battery System comprises a high-voltage Battery and a Battery Management System (BMS). The front drive motor, the rear drive motor, the electric heater, the direct current converter and the air conditioner compressor share one power battery.
And the whole power battery system is comprehensively managed by the whole vehicle controller. The interface between the electric automobile and the driver is completed by the whole automobile controller. The vehicle controller judges the driving intention of a driver by controlling an accelerator pedal, a brake pedal, a gear and the like by the driver, calculates the driving torque, the braking torque, the available power and the like required by the running of the whole vehicle according to the information fed back by related parts, controls the related parts by a CAN bus and hard wire connection, and displays the information required for warning the driver on an instrument to display the state of the whole vehicle. Meanwhile, the vehicle controller can monitor the states of the whole vehicle and all parts in real time during vehicle running, and corresponding processing is carried out according to the fault level, so that the safety of the vehicle and drivers is ensured.
In order to realize the whole vehicle power-on and power-off control of the electric vehicle and improve the safety of a whole vehicle high-voltage driving system, the embodiment of the invention provides a method, a device, equipment and a medium for the power-on and power-off control of the electric vehicle.
Example 1:
fig. 2 is a schematic process diagram of a method for controlling an electric vehicle according to an embodiment of the present invention, and as shown in fig. 2, the process includes the following steps:
s201: when the electric automobile is in a first power-on and power-off mode, if it is detected that the high-voltage relay of the electric automobile is disconnected and the connection state of the charging wire conforms to a first preset state corresponding to the first power-on and power-off mode, S202 is performed, wherein the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
In order to implement the power-on and power-off control of the whole electric vehicle, in the embodiment of the present invention, the power-on and power-off control method of the electric vehicle is applied to an electronic device, where the electronic device may be a controller of the electric vehicle, or a controller of a whole vehicle control system of the electric vehicle, and the embodiment of the present invention is not limited thereto.
In order to realize the power-on and power-off control of the whole electric automobile, wherein the electric automobile can be a hybrid electric automobile or a pure electric automobile, the electronic equipment firstly determines the current power-on and power-off mode of the electric automobile, and when the electric automobile is in the first power-on and power-off mode, the electronic equipment well detects the connection state of a high-voltage relay and the connection state of a charging wire of the electric automobile in order to switch the electric automobile from the first power-on and power-off mode to the second power-on and power-off mode so as to realize the power-on and power-off control of the whole electric automobile.
The first power-up and power-down mode is a driving power-up and power-down mode or a charging power-up and power-down mode, so that the electronic equipment also pre-stores a first preset state corresponding to the first power-up and power-down mode, and the first preset state corresponding to the driving power-up and power-down mode is different from the first preset state corresponding to the charging power-up and power-down mode of the first power-up and power-down mode. If the first power-up and power-down mode is the driving power-up and power-down mode, the first preset state is a connection state, and if the first power-up and power-down mode is the charging power-up and power-down mode, the first preset state is a disconnection state.
If the connection disconnection of the high-voltage relay of the electric automobile is detected and the connection state of the charging wire accords with a first preset state corresponding to a first power-on and power-off mode, the fact that the electric automobile meets the power-on and power-off mode switching condition is indicated, and therefore the electric automobile can be controlled to carry out mode switching.
The first power-up and power-down mode is a driving power-up and power-down mode or a charging power-up and power-down mode, the second power-up and power-down mode is a charging power-up and power-down mode or a driving power-up and power-down mode, namely when the first power-up and power-down mode is the driving power-up and power-down mode, the second power-up and power-down mode is the charging power-up and power-down mode, and when the first power-up and power-down mode is the charging power-up and power-down mode, the second power-up and power-down mode is the driving power-up and power-down mode.
S202: controlling the electric vehicle to switch from the first power-up and power-down mode to a second power-up and power-down mode.
When the fact that the high-voltage relay of the electric automobile is disconnected and the connection state of the charging wire meets a first preset state corresponding to a first power-on and power-off mode is determined, the electric automobile is controlled to be switched from the first power-on and power-off mode to a second power-on and power-off mode, when the first power-on and power-off mode is the power-on and power-off mode of the traveling crane, the electric automobile is controlled to be switched from the power-on and power-off mode of the traveling crane to the power-on and power-off mode of the charging crane, and when the first power-on and power-off mode is the power-on and power-off mode of the charging crane, the electric automobile is controlled to be switched from the power-on and power-off mode of the charging crane.
Example 2:
in order to switch the first power-up/down mode to the charging power-up/down mode, in an embodiment of the present invention, if the first power-up/down mode is the charging power-up/down mode, and if it is detected that the high voltage relay of the electric vehicle is disconnected and the connection state of the charging line conforms to a first preset state corresponding to the first power-up/down mode, controlling the electric vehicle to switch from the first power-up/down mode to a second power-up/down mode includes:
and if the high-voltage relay of the electric automobile is detected to be disconnected, the charging wire is in a disconnected state, and the key is in a key power-on state, controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
If the first power-up and power-down mode is the charging power-up and power-down mode, in order to switch from the charging power-up and power-down mode to the driving power-up and power-down mode, the electronic equipment detects the connection state of a high-voltage relay, the connection state of a charging wire and the state of a key of the electric automobile, and if the connection disconnection of the high-voltage relay, the connection state of the charging wire and the state of the key of the electric automobile are detected, the electric automobile is indicated to accord with the power-up and power-down mode switching condition, and therefore the electric automobile is controlled to be switched from the charging power-up and power-down mode to the driving power-up and power-down mode.
Example 3:
an electric vehicle power-on and power-off control method according to an embodiment of the present invention is described below with reference to a specific embodiment, and fig. 3 is a schematic diagram of an electric vehicle power-on and power-off control method according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
s301: the vehicle control unit is activated and then carries out system initialization and self-checking, if the charging line is not connected, the S302 is carried out, and if the charging line is connected, the S303 is carried out.
The vehicle control unit activation comprises network activation and hard-line key activation, wherein the network activation comprises three modes of charging activation, key unlocking of the vehicle and remote terminal unlocking of the vehicle; the vehicle control unit charging activation means that the vehicle control unit is activated by inserting a charging wire under the condition that the electric vehicle is locked, and the vehicle control unit enters a charging power-on and power-off mode after being charged and activated; after the vehicle control unit is activated by a hard-wire key, unlocked by the key and unlocked by a remote terminal, the electric vehicle is controlled to enter a driving power-on and power-off mode.
S302: controlling the electric automobile to enter a driving power-on and power-off mode to carry out power-on and power-off control, and if the high-voltage relay of the electric automobile is detected to be disconnected and the connection state of a charging wire accords with the connection state corresponding to the driving power-on and power-off mode, entering S303; if it is detected that the high-voltage relay of the electric vehicle is disconnected and the key is in the power-off state, the process proceeds to S304.
S303: controlling the electric automobile to enter a charging power-on and power-off mode to carry out power-on and power-off control, and entering S302 if the connection disconnection of a high-voltage relay of the electric automobile, the disconnection state of a charging wire and the power-on state of a key are detected; if disconnection of the high-voltage relay of the electric vehicle is detected, the process proceeds to S304.
S304: and controlling the low-voltage reduction of the electric automobile.
Example 4:
in order to implement the power-up and power-down control of the electric vehicle in the charging power-up and power-down mode, in an embodiment of the present invention, on the basis of the above embodiments, if the first power-up and power-down mode is the driving power-up and power-down mode, after the controlling the electric vehicle to switch from the first power-up and power-down mode to the second power-up and power-down mode, the method further includes:
controlling the electric automobile to enter a charging power-on mode and start to be powered on;
if the charging completion or the charging stop fault is detected, controlling the electric automobile to enter a charging power-down mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the charging and discharging of the electric automobile are completed if the high-voltage relay is detected to be disconnected within a first preset time period or the detection time reaches the first preset time period.
When the first power-up and power-down mode is the driving power-up and power-down mode, the electronic equipment controls the electric automobile to enter the charging power-up mode and start to power up after controlling the electric automobile to be switched from the driving power-up and power-down mode to the charging power-up and power-down mode.
Specifically, the electronic equipment controls the front and rear driving motors of the electric automobile to be disabled, and controls the enabling and heat management functions of the direct current converter to be started after the connection of the high-voltage relay is detected, so that the charging and electrifying in the electric automobile are completed.
The method comprises the steps that after charging and electrifying of the electric automobile are determined to be completed, the electric automobile is charged, and if charging is detected to be completed in the charging process, the electric automobile is controlled to enter a charging and electrifying mode; or after the charging stop fault of the electric automobile is detected, controlling the electric automobile to stop charging and controlling the electric automobile to enter a charging power-down mode.
Specifically, in the charging power-off mode, the electronic equipment controls a direct-current converter and other high-low voltage accessories of the electric automobile to be disabled, controls the high-voltage relay to be disconnected and starts to detect the connection state of the high-voltage relay.
And if the high-voltage relay is detected to be disconnected in the first preset time period or the detection time reaches the first preset time period, determining that the charging and discharging of the electric automobile are completed. The first preset time length is the time length required by the disconnection of the high-voltage relay according to the preset time length.
Example 5:
in the following, the power on/off control in the charging power on/off mode according to the embodiment of the present invention is described by a specific embodiment, taking an electronic device as an example of a vehicle control unit of an electric vehicle, and fig. 4 is a schematic process diagram of a power on/off control method in the charging power on/off mode according to the embodiment of the present invention, as shown in fig. 4, the method includes the following steps:
s401: the vehicle control unit controls the electric vehicle to enter a charging power-on mode and start to be powered on, and sends a motor unloading instruction to the front motor system and the rear motor system.
Wherein, the front and rear driving motors are controlled to be disabled, and the ready state of the vehicle control system is set to 0.
S402: and determining whether the connection of the high-voltage relay is detected, if so, entering S403, otherwise, continuing to S402.
S403: and when the connection state of the high-voltage relay is detected, controlling the enabling and thermal management functions of the direct-current converter to be started.
S404: in the charging and electrifying mode, charging stop fault detection is continuously performed to determine whether a charging stop fault occurs, if so, S405 is performed, and if not, S406 is performed.
S405: a charge stop command is transmitted to the battery management system, and S407 is performed.
S406: whether charging completion is detected is determined, if not, S404 is performed, and if so, S407 is performed.
S407: and controlling the direct current converter and other high-low voltage accessories of the electric automobile to be disabled.
S408: and controlling the high-voltage relay to be disconnected and starting to detect the connection state of the high-voltage relay.
S409: and determining whether disconnection of the high-voltage relay is detected, if not, performing S410, and if so, performing S411.
S410: and determining whether the detection time reaches a first preset time length, if so, performing S412, and if not, performing S409.
S411: and determining that the travelling crane is allowed to be powered on.
When the vehicle controller receives a connection and disconnection completion state of a high-voltage relay sent by a battery management system, a vehicle control system sends a vehicle-driving power-on permission mark 1, and if the connection and disconnection of a charging wire is detected and a key power-on state exists, a vehicle-driving power-on and power-off mode can be entered, and a high-voltage power-on instruction of a driver is responded.
S412: whether to recharge is determined, if so, S401 is performed, and if not, S413 is performed.
S413: and determining that the charging and discharging of the electric automobile are completed.
Example 6:
in order to realize the power-on and power-off control of the electric vehicle in the driving power-on and power-off mode, in an embodiment of the present invention, on the basis of the above embodiments, if the first power-on and power-off mode is the charging power-on and power-off mode, after the controlling the electric vehicle to switch from the first power-on and power-off mode to the second power-on and power-off mode, the method further includes:
controlling the electric automobile to enter a driving power-on mode, determining whether driving power-on is completed or not, and starting driving if the driving power-on is completed;
if the key state of the electric automobile is detected to be in a key power-off state or the electric automobile is powered off due to faults, controlling the electric automobile to enter a driving power-off mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the running of the electric automobile is finished if the high-voltage relay is detected to be disconnected within a second preset time period or the detection time reaches the second preset time period.
When the first power-up and power-down mode is the charging power-up and power-down mode, after the electric automobile is controlled to be switched to the driving power-up and power-down mode from the charging power-up and power-down mode, the electronic equipment controls the electric automobile to enter the driving power-up mode and start driving power-up.
Specifically, the electronic device sequentially controls the high-voltage relay, the direct-current converter, the thermal management function and the front and rear driving motors of the electric vehicle to be enabled within each corresponding third preset time period, that is, after the electronic device controls the high-voltage relay to be successfully enabled within the corresponding third preset time period, the electronic device controls the direct-current converter and the thermal management function to be successfully enabled within the corresponding third preset time period, and then controls the front and rear driving motors to be enabled within the corresponding third preset time period.
In order to determine whether the traveling crane is powered on or not, in the embodiment of the present invention, the determining whether the traveling crane is powered on or not includes:
detecting whether the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are enabled to be completed within third preset time lengths corresponding to the high-voltage relay, the direct-current converter and the heat management function respectively;
and if so, determining that the running of the electric automobile is powered on.
In order to determine whether the driving is powered on or not, the electronic equipment detects whether the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are enabled to be completed within a third preset time period corresponding to the high-voltage relay, the direct-current converter and the heat management function. Specifically, the electronic device first detects whether the high-voltage relay is enabled within a third preset time period corresponding to the high-voltage relay, if so, detects whether the direct-current converter and the thermal management function are enabled within the third preset time period corresponding to the high-voltage relay, if so, detects whether the front and rear driving motors are enabled within the third preset time period corresponding to the front and rear driving motors, and if so, determines that the driving of the electric vehicle is powered on.
In order to determine how the electric vehicle enters the failure mode, in an embodiment of the present invention, the method further includes:
if not, determining that the electric automobile enters a fault mode and carrying out fault detection.
And if the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are detected to be enabled and completed within the third preset time length respectively corresponding to the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors, determining that the electric automobile enters a fault mode and performing fault detection.
Specifically, when detecting that the high-voltage relay, the direct-current converter, the thermal management function and the front and rear driving motors are not enabled to be completed within the third preset time period corresponding to the high-voltage relay, the method specifically includes the following conditions: the electronic equipment detects that the high-voltage relay is not enabled within a third preset time period corresponding to the high-voltage relay; detecting that the high-voltage relay is enabled to be completed within a third preset time period corresponding to the high-voltage relay, but the direct-current converter and the thermal management function are not enabled to be completed within the third preset time period corresponding to the high-voltage relay; and detecting that the high-voltage relay, the direct-current converter and the thermal management function are enabled to be completed within the third preset time period corresponding to the high-voltage relay, the direct-current converter and the thermal management function, but the front and rear driving motors are not enabled to be completed within the third preset time period corresponding to the high-voltage relay, the direct-current converter and the thermal management function.
The electronic equipment receives an instruction of a user to control the electric automobile to start driving, and if the key state of the electric automobile is detected to be in the key-off state or the electric automobile is detected to be in power-off failure, the electric automobile is controlled to enter a driving power-off mode.
Specifically, in the power-off mode during driving, the electronic device controls the front and rear driving motors to be enabled within a fourth preset time period corresponding to the front and rear driving motors, and if it is detected that the front and rear driving motors are enabled within the fourth preset time period or the detection time reaches the fourth preset time period, the electronic device controls the high-voltage relay to be disconnected within the second preset time period and starts to detect.
And if the high-voltage relay is detected to be disconnected within a second preset time period, or the detection time reaches the second preset time period, determining that the driving of the electric automobile is completed, wherein the second preset time period is the time period required by the preset connection and disconnection of the high-voltage relay, and the second preset time period may be the same as or different from the first preset time period.
Example 6:
in the following, the power on/off control in the power on/off driving mode according to the embodiment of the present invention is described with a specific embodiment, taking an electronic device as a whole vehicle controller of an electric vehicle as an example, fig. 5 is a schematic process diagram of a power on/off control method in the power on/off driving mode according to the embodiment of the present invention, as shown in fig. 5, the method includes the following steps:
s501: the vehicle control unit determines whether a high-voltage electrification forbidding fault exists, if not, the step S502 is carried out, and if so, the step S513 is carried out.
S502: and determining whether a driver high-voltage power-on intention is received, if so, performing S503, and if not, performing S502.
The high-voltage electrifying intention comprises the state of a brake pedal received by the whole vehicle control device, a gear state, a key state and the like.
S503: and controlling a high-voltage relay of the electric automobile to enable and start detection, namely, electrifying the electric automobile at high voltage.
Specifically, the vehicle control unit sends a high-voltage power-on command to the battery management system, and the battery management system controls the high-voltage relay after receiving the high-voltage power-on command, so that pre-charging and high-voltage power-on control of the high-voltage battery system are realized, the internal state is detected in real time, and if a fault exists, the fault is reported in time.
S504: and determining whether the high-voltage relay is successfully connected, if not, performing S505, and if so, performing S506.
S505: and determining whether the detection time reaches a corresponding third preset time length, if not, performing S504, and if so, performing S513.
S506: the dc converter and thermal management functions controlling the electric vehicle are enabled and start the test.
S507: and determining whether the direct current converter and the thermal management function are enabled successfully, if not, performing S508, and if so, performing S509.
S508: and determining whether the detection time reaches a corresponding third preset time length, if not, performing S507, and if so, performing S513.
S509: and controlling the front and rear driving motors of the electric automobile to enable and start detection.
S510: and determining whether the front and rear driving motors are enabled successfully, if not, performing S511, and if so, performing S512.
S511: and determining whether the detection time reaches a corresponding third preset time length, if not, performing S510, and if so, performing S513.
S512: and determining that the running of the electric automobile is powered on.
S513: and determining that the electric vehicle enters a fault mode and detecting faults, and performing S514.
S514: and determining whether the key state of the electric vehicle is detected to be in a key power-off state or the electric vehicle is in a fault power-off state, if so, performing S515, and if not, performing S514.
S515: and controlling the front and rear driving motors to be disabled and starting detection.
S516: and determining whether the front and rear driving motors are enabled successfully, if not, performing S517, and if so, performing S518.
S517: and determining whether the detection time reaches a corresponding fourth preset time length, if not, performing S516, and if so, performing S518.
S518: and controlling the high-voltage relay to be disabled and starting detection.
The vehicle control unit continuously detects the state feedback of the motor within 200ms after the motor unloading instruction is generated to the battery system, and sends a high-voltage disconnection instruction to the battery system to control the high-voltage relay to be disconnected if the unloading completion state or overtime is received, so that the high-voltage relay is enabled. After receiving a high-voltage disconnection instruction sent by the vehicle control unit, the battery system specifically controls the relay to be disconnected when the current battery output current is smaller than a set threshold value.
S519: and determining whether the high-voltage relay is enabled successfully, if not, performing S520, and if so, performing S521.
S520: and determining whether the detection time reaches a corresponding second preset time length, if not, performing S519, and if so, performing S521.
S521: and determining whether the key power-on state is detected, if so, performing S501, and if not, performing S522.
When the high-voltage relay is disconnected, the high-voltage power-down is determined to be completed, if the key is detected to be electrified, the whole vehicle controller jumps to a driving power-up process from a driving lower current process to carry out power-up control, if the key power-up state is detected in the high-voltage power-up process but the high-voltage relay is not disconnected, the whole vehicle controller does not respond to the request, and the re-electrification request is not responded until the high-voltage power-down disconnection is completed;
s522: and determining that the running of the electric automobile is finished after power off.
Example 7:
fig. 6 is a schematic structural diagram of an electric vehicle power-on and power-off control device provided in an embodiment of the present invention, where the device includes:
the detection module 601 is configured to, when the electric vehicle is in a first power-up and power-down mode, trigger the control module 602 if it is detected that the high-voltage relay of the electric vehicle is disconnected and the connection state of the charging line meets a first preset state corresponding to the first power-up and power-down mode;
the control module 602 is configured to control the electric vehicle to switch from the first power-up and power-down mode to a second power-up and power-down mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
Further, the detection module is specifically configured to trigger the control module if it is detected that the high-voltage relay of the electric vehicle is disconnected, the charging line is disconnected, and the key is powered on;
the control module is specifically used for controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
Further, the control module is further configured to control the electric vehicle to enter a charging power-on mode and start to power on;
the detection module is further used for controlling the electric automobile to enter a charging and discharging mode if the charging completion or the charging stop fault is detected;
the control module is also used for controlling the high-voltage relay of the electric automobile to be disconnected and start to detect;
the detection module is further configured to determine that charging and discharging of the electric vehicle are completed if it is detected that the high-voltage relay is disconnected in a first preset time period or the detection time reaches the first preset time period.
Further, the control module is also used for controlling the electric automobile to enter a driving power-on mode;
the detection module is further used for determining whether the completion of the power-on of the electric vehicle is finished, starting the electric vehicle if the completion of the power-on of the electric vehicle is finished, and triggering the control module if the key state of the electric vehicle is detected to be in a key power-off state or the electric vehicle is in a fault power-off state;
the control module is also used for controlling the electric automobile to enter a driving power-off mode, controlling the high-voltage relay of the electric automobile to be disconnected and starting detection;
the detection module is further used for determining that the running of the electric automobile is finished when the high-voltage relay is disconnected within a second preset time period or the detection time reaches the second preset time period.
Further, the detection module is specifically configured to detect whether the high-voltage relay, the dc converter, the thermal management function, and the front and rear driving motors are enabled within third preset durations respectively corresponding thereto; and if so, determining that the running of the electric automobile is powered on.
Further, the detection module is further configured to determine that the electric vehicle enters a fault mode and perform fault detection if the detection of the high-voltage relay, the dc converter, the thermal management function and the enabling of the front and rear driving motors are not completed within third preset durations respectively corresponding to the high-voltage relay, the dc converter, the thermal management function and the front and rear driving motors.
Example 8:
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and on the basis of the foregoing embodiments, the present application further provides an electronic device including a processor 701, a communication interface 702, a memory 703 and a communication bus 704, where the processor 701, the communication interface 702 and the memory 703 complete mutual communication through the communication bus 704;
the memory 703 has stored therein a computer program which, when executed by the processor 701, causes the processor 701 to perform the steps of:
when the electric automobile is in a first power-on and power-off mode, if the fact that the high-voltage relay of the electric automobile is disconnected and the connection state of a charging wire meets a first preset state corresponding to the first power-on and power-off mode is detected, the electric automobile is controlled to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
Further, the processor 701 is specifically configured to, if the first power-on/power-off mode is a driving power-on/power-off mode, set the first preset state to be a connection state.
Further, the processor 701 is specifically configured to, if the first power-up and power-down mode is a charging power-up and power-down mode, set the first preset state to an off state.
Further, the processor 701 is specifically configured to, if the first power up and down mode is the charging power up and down mode, if it is detected that the high voltage relay of the electric vehicle is disconnected and the connection state of the charging line meets a first preset state corresponding to the first power up and down mode, control the electric vehicle to switch from the first power up and down mode to the second power up and down mode, including:
and if the high-voltage relay of the electric automobile is detected to be disconnected, the charging wire is in a disconnected state, and the key is in a key power-on state, controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
Further, the processor 701 is further configured to, if the first power-up and power-down mode is a driving power-up and power-down mode, after the controlling the electric vehicle to switch from the first power-up and power-down mode to a second power-up and power-down mode, the method further includes:
controlling the electric automobile to enter a charging power-on mode and start to be powered on;
if the charging completion or the charging stop fault is detected, controlling the electric automobile to enter a charging power-down mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and if the high-voltage relay is detected to be disconnected in a first preset time period or the detection time reaches the first preset time period, determining that the charging and discharging of the electric automobile are completed.
Further, the processor 701 is further configured to, if the first power-up and power-down mode is a charging power-up and power-down mode, after the controlling the electric vehicle to switch from the first power-up and power-down mode to a second power-up and power-down mode, the method further includes:
controlling the electric automobile to enter a driving power-on mode, determining whether driving power-on is completed or not, and starting driving if the driving power-on is completed;
if the key state of the electric automobile is detected to be in a key power-off state or the electric automobile is powered off due to faults, controlling the electric automobile to enter a driving power-off mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the running of the electric automobile is finished if the high-voltage relay is detected to be disconnected within a second preset time period or the detection time reaches the second preset time period.
Further, the processor 701 is specifically configured to determine whether the driving power-on is completed includes:
detecting whether the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are enabled to be completed within third preset time lengths corresponding to the high-voltage relay, the direct-current converter and the heat management function respectively;
and if so, determining that the running of the electric automobile is powered on.
Further, the processor 701 is further configured to determine that the electric vehicle enters a fault mode and perform fault detection if the electric vehicle does not enter the fault mode.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface 702 is used for communication between the above-described electronic apparatus and other apparatuses.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital instruction processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc.
Example 9:
on the basis of the foregoing embodiments, the present invention further provides a computer-readable storage medium, in which a computer program executable by a processor is stored, and when the program runs on the processor, the processor is caused to execute the following steps:
when the electric automobile is in a first power-on and power-off mode, if the fact that the high-voltage relay of the electric automobile is disconnected and the connection state of a charging wire meets a first preset state corresponding to the first power-on and power-off mode is detected, the electric automobile is controlled to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
Further, if the first power-on/power-off mode is a driving power-on/power-off mode, the first preset state is a connection state.
Further, if the first power-up and power-down mode is the charging power-up and power-down mode, the first preset state is the off state.
Further, if the first power-on/off mode is the charging power-on/off mode, if it is detected that the high-voltage relay of the electric vehicle is disconnected and the connection state of the charging wire conforms to a first preset state corresponding to the first power-on/off mode, controlling the electric vehicle to switch from the first power-on/off mode to the second power-on/off mode includes:
and if the high-voltage relay of the electric automobile is detected to be disconnected, the charging wire is in a disconnected state, and the key is in a key power-on state, controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
Further, if the first power-up and power-down mode is a driving power-up and power-down mode, after the electric vehicle is controlled to switch from the first power-up and power-down mode to a second power-up and power-down mode, the method further includes:
controlling the electric automobile to enter a charging power-on mode and start to be powered on;
if the charging is finished or the charging stops, controlling the electric automobile to enter a charging and discharging mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the charging and discharging of the electric automobile are completed if the high-voltage relay is detected to be disconnected within a first preset time period or the detection time reaches the first preset time period.
Further, if the first power-up/down mode is a charging power-up/down mode, after the controlling the electric vehicle to switch from the first power-up/down mode to a second power-up/down mode, the method further includes:
controlling the electric automobile to enter a driving power-on mode, determining whether driving power-on is completed or not, and starting driving if the driving power-on is completed;
if the key state of the electric automobile is detected to be in a key power-off state or the electric automobile is powered off due to faults, controlling the electric automobile to enter a driving power-off mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the running of the electric automobile is finished if the high-voltage relay is detected to be disconnected within a second preset time period or the detection time reaches the second preset time period.
Further, the determining whether the vehicle is powered on includes:
detecting whether the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are enabled to be completed within third preset time lengths corresponding to the high-voltage relay, the direct-current converter and the heat management function respectively;
and if so, determining that the running of the electric automobile is powered on.
Further, the method further comprises:
if not, determining that the electric automobile enters a fault mode and carrying out fault detection.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (11)

1. An electric vehicle power-on and power-off control method is characterized by comprising the following steps:
when the electric automobile is in a first power-on and power-off mode, if the connection disconnection of a high-voltage relay of the electric automobile is detected and the connection state of a charging wire accords with a first preset state corresponding to the first power-on and power-off mode, controlling the electric automobile to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
2. The method of claim 1, wherein the first predetermined status is a connection status if the first power-up/down mode is a power-on/down mode.
3. The method of claim 1, wherein the first predetermined state is an off state if the first power-up/down mode is a charging power-up/down mode.
4. The method according to claim 3, wherein if the first power-up/power-down mode is a charging power-up/power-down mode, the controlling the electric vehicle to switch from the first power-up/power-down mode to a second power-up/power-down mode when it is detected that a high-voltage relay of the electric vehicle is disconnected and a charging wire connection state meets a first preset state corresponding to the first power-up/power-down mode comprises:
and if the high-voltage relay of the electric automobile is detected to be disconnected, the charging wire is in a disconnected state and the key is in a key power-on state, controlling the electric automobile to be switched from the charging power-on and power-off mode to the driving power-on and power-off mode.
5. The method of claim 1, wherein if the first power-up/down mode is a driving power-up/down mode, after the controlling the electric vehicle to switch from the first power-up/down mode to a second power-up/down mode, the method further comprises:
controlling the electric automobile to enter a charging power-on mode and start to be powered on;
if the charging completion or the charging stop fault is detected, controlling the electric automobile to enter a charging power-down mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the charging and discharging of the electric automobile are completed if the high-voltage relay is detected to be disconnected within a first preset time period or the detection time reaches the first preset time period.
6. The method of claim 1, wherein if the first power-up/down mode is a charging power-up/down mode, after the controlling the electric vehicle to switch from the first power-up/down mode to a second power-up/down mode, the method further comprises:
controlling the electric automobile to enter a driving power-on mode, determining whether driving power-on is completed or not, and starting driving if the driving power-on is completed;
if the key state of the electric automobile is detected to be in a key power-off state or the electric automobile is powered off due to faults, controlling the electric automobile to enter a driving power-off mode;
and controlling the high-voltage relay of the electric automobile to be disconnected and start to detect, and determining that the running of the electric automobile is finished if the high-voltage relay is detected to be disconnected within a second preset time period or the detection time reaches the second preset time period.
7. The method of claim 6, wherein determining whether the vehicle is powered up comprises:
detecting whether the high-voltage relay, the direct-current converter, the heat management function and the front and rear driving motors are enabled to complete within third preset time periods respectively corresponding to the high-voltage relay, the direct-current converter and the heat management function;
and if so, determining that the running of the electric automobile is powered on.
8. The method of claim 7, further comprising:
if not, determining that the electric automobile enters a fault mode and carrying out fault detection.
9. An electric vehicle power-on and power-off control device, characterized in that the device comprises:
the detection module is used for triggering the control module if the high-voltage relay of the electric automobile is detected to be disconnected and the connection state of a charging wire accords with a first preset state corresponding to a first power-up and power-down mode when the electric automobile is in the first power-up and power-down mode;
the control module is used for controlling the electric automobile to be switched from the first power-on and power-off mode to a second power-on and power-off mode; the first power-on and power-off mode is a driving power-on and power-off mode or a charging power-on and power-off mode, and the second power-on and power-off mode is the charging power-on and power-off mode or the driving power-on and power-off mode.
10. An electronic device, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
the memory stores a computer program, and when the program is executed by the processor, the processor executes the computer program stored in the memory to realize the steps of the power-on and power-off control method of the electric vehicle according to any one of claims 1 to 8.
11. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the steps of the power-on and power-off control method of an electric vehicle according to any one of claims 1 to 8.
CN202210550798.1A 2022-05-18 2022-05-18 Method, device, equipment and medium for controlling power on and power off of electric automobile Pending CN114954015A (en)

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