CN110356237B - Electric vehicle and high-voltage power-off control method and device thereof - Google Patents
Electric vehicle and high-voltage power-off control method and device thereof Download PDFInfo
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- CN110356237B CN110356237B CN201910569071.6A CN201910569071A CN110356237B CN 110356237 B CN110356237 B CN 110356237B CN 201910569071 A CN201910569071 A CN 201910569071A CN 110356237 B CN110356237 B CN 110356237B
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention discloses a high-voltage power-off control method and device for an electric vehicle and the electric vehicle, wherein the control method comprises the following steps: detecting whether CAN communication and a low-voltage power supply of the high-voltage distribution box are abnormal or not; if the CAN communication is normal and the low-voltage power supply is abnormal, starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box, sending a fault message to the whole vehicle controller to wait for an instruction, and executing power-off operation when the waiting time reaches a first preset time; if the CAN communication is abnormal and the low-voltage power supply is abnormal, starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box, and executing power-off operation when the duration of the auxiliary power supply reaches a second preset time; the high voltage of the electric vehicle CAN be safely powered off under the condition that the high voltage distribution box is interrupted by a low voltage terminal or CAN communication, and the stability of the whole vehicle and the service life of components of the electric vehicle are guaranteed.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a high-voltage power-down control method of an electric vehicle, a high-voltage power-down control device of the electric vehicle and the electric vehicle.
Background
In the related art, when an electric vehicle encounters external low-voltage interruption or CAN communication interruption of a PDU (high-voltage distribution box), effective protective measures are not correspondingly executed, so that the electric vehicle is powered off under the condition that the power is not allowed to be turned off (for example, during the driving process of the electric vehicle), and further safety problems are caused; meanwhile, under the condition that the active discharge is not completely finished, the relay is automatically disconnected, so that elements such as the relay and the fuse are impacted by large current, and the stability of the whole vehicle and the service life of components are seriously influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a high voltage power down control method for an electric vehicle, which CAN safely power down a high voltage of the electric vehicle under the condition that a low voltage terminal outside a high voltage distribution box or CAN communication is interrupted, thereby ensuring the stability of the whole vehicle and the service life of components of the electric vehicle.
A second object of the present invention is to provide a high voltage power down control apparatus for an electric vehicle.
A third object of the invention is to propose an electric vehicle.
In order to achieve the above object, a first aspect of the present invention provides a high voltage power-off control method for an electric vehicle, including: detecting whether CAN communication of a high-voltage distribution box is abnormal or not, and detecting whether a low-voltage power supply of the high-voltage distribution box is abnormal or not; if the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box, sending a fault message to a vehicle control unit to wait for the vehicle control unit to issue a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the waiting time reaches a first preset time; if the CAN communication of high voltage distribution box is unusual, just the low pressure power supply of high voltage distribution box is unusual, then start high pressure changes low pressure auxiliary power supply right the control unit of high voltage distribution box carries out auxiliary power supply, and high pressure changes low pressure auxiliary power supply right the duration that the control unit of high voltage distribution box carries out auxiliary power supply reaches the second and predetermines time the control the corresponding high-voltage apparatus of high voltage distribution box carries out the electricity operation down.
According to the high-voltage power-off control method of the electric vehicle, firstly, CAN communication and a low-voltage power supply of a high-voltage distribution box are detected to judge whether the CAN communication of the high-voltage distribution box is abnormal or not and judge whether the low-voltage power supply of the high-voltage distribution box is abnormal or not; when CAN communication of the high-voltage distribution box is in production and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage-to-low-voltage auxiliary power supply to supply power to a control unit of the high-voltage distribution box in an auxiliary mode, sending a fault message to a vehicle control unit to wait for the vehicle control unit to send a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to execute power-off operation when the waiting time reaches a first preset time; when CAN communication of the high-voltage distribution box is abnormal and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the duration of the auxiliary power supply of the high-voltage to low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time; therefore, the high voltage of the electric vehicle is safely powered off under the condition that the high voltage distribution box is interrupted by a low voltage terminal or CAN communication, and the stability of the whole vehicle and the service life of components of the electric vehicle are guaranteed.
In addition, the electric vehicle high-voltage power-off control method according to the present invention may further have the following additional technical features:
specifically, whether the CAN communication of detecting high voltage distribution box is unusual includes: detecting whether the CAN communication interruption time of the high-voltage distribution box is more than or equal to a third preset time or not; if the CAN communication interruption time of the high-voltage distribution box is more than or equal to a third preset time, judging that the CAN communication of the high-voltage distribution box is abnormal; and if the CAN communication interruption time of the high-voltage distribution box is less than a third preset time, judging that the CAN communication of the high-voltage distribution box is normal.
Specifically, detecting whether the low-voltage power supply of the high-voltage distribution box is abnormal includes: detecting the voltage of the low-voltage power supply and judging whether the voltage of the low-voltage power supply is smaller than a preset voltage or not; and if the voltage of the low-voltage power supply is less than the preset voltage and the duration time reaches the fourth preset time, judging that the low-voltage power supply of the high-voltage distribution box is abnormal.
Specifically, controlling a corresponding high-voltage device of the high-voltage distribution box to perform a power-down operation includes: and sending a non-enabling signal to the corresponding high-voltage device of the high-voltage distribution box so as to control the corresponding high-voltage device of the high-voltage distribution box to be powered off, and disconnecting the relay of the corresponding high-voltage device after waiting for a fifth preset time, and then disconnecting the main positive relay of the high-voltage power supply loop.
Optionally, when the CAN communication of the high voltage distribution box is normal and the low voltage power supply of the high voltage distribution box is normal, or the CAN communication of the high voltage distribution box is abnormal and the low voltage power supply of the high voltage distribution box is normal, returning to continue to detect whether the CAN communication of the high voltage distribution box is abnormal and whether the low voltage power supply of the high voltage distribution box is abnormal.
In order to achieve the above object, an embodiment of the present invention provides a high voltage power down control apparatus for an electric vehicle, including: the communication detection module is used for detecting whether CAN communication of the high-voltage distribution box is abnormal or not; the power supply detection module is used for detecting whether the low-voltage power supply of the high-voltage distribution box is abnormal or not; the power-off control module is used for starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box when the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, sending a fault message to a vehicle controller to wait for the vehicle controller to issue a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the waiting time reaches a first preset time; the power-off control module is also used for starting the high-voltage to low-voltage auxiliary power supply to carry out auxiliary power supply on the control unit of the high-voltage distribution box when the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is abnormal, and controlling the corresponding high-voltage device of the high-voltage distribution box to carry out power-off operation when the duration of the auxiliary power supply carried out on the control unit of the high-voltage distribution box by the high-voltage to low-voltage auxiliary power supply reaches second preset time.
According to the high-voltage power-off control device of the electric vehicle, whether CAN communication of the high-voltage distribution box is abnormal or not is detected through the communication detection module, and whether a low-voltage power supply of the high-voltage distribution box is abnormal or not is detected through the power supply detection module; when CAN communication of the high-voltage distribution box is normal and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage-to-low-voltage auxiliary power supply through a power-down control module to perform auxiliary power supply on a control unit of the high-voltage distribution box, sending a fault message to a vehicle controller to wait for the vehicle controller to issue a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-down operation when the waiting time reaches a first preset time; when CAN communication of the high-voltage distribution box is abnormal and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage-to-low-voltage auxiliary power supply through a power-down control module to perform auxiliary power supply on a control unit of the high-voltage distribution box, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-down operation when the duration of the auxiliary power supply of the high-voltage-to-low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time; therefore, the high voltage of the electric vehicle is safely powered off under the condition that the high voltage distribution box is interrupted by a low voltage terminal or CAN communication, and the stability of the whole vehicle and the service life of components of the electric vehicle are guaranteed.
In addition, the electric control device under high voltage for an electric vehicle according to the present invention may further have the following additional features:
specifically, the communication detection module judges whether the CAN communication of the high-voltage distribution box is abnormal by detecting whether the CAN communication interruption time of the high-voltage distribution box is greater than or equal to a third preset time, and the power supply detection module judges whether the low-voltage power supply of the high-voltage distribution box is abnormal by detecting whether the duration time that the voltage of the low-voltage power supply is less than the preset voltage reaches a fourth preset time.
Specifically, when the power-off control module controls the corresponding high-voltage device of the high-voltage distribution box to perform power-off operation, the power-off control module firstly sends a non-enable signal to the corresponding high-voltage device of the high-voltage distribution box to control the corresponding high-voltage device of the high-voltage distribution box to power off, and after waiting for a fifth preset time, the power-off control module disconnects the relay of the corresponding high-voltage device and then disconnects the main positive relay of the high-voltage power supply loop.
Optionally, the respective high voltage devices of the high voltage distribution box include an oil pump device, an air pump device, a DC/DC device, an electric heating device, an electric defrosting device, and an air conditioning device.
In order to achieve the above object, an electric vehicle according to a third embodiment of the present invention includes the high voltage power down control device of the electric vehicle as described above.
According to the electric vehicle provided by the embodiment of the invention, the high-voltage power-down control device of the electric vehicle is loaded, so that the high voltage of the electric vehicle is safely powered down under the condition that a low-voltage terminal outside a high-voltage distribution box or CAN communication is interrupted, and the stability of the whole vehicle and the service life of components of the electric vehicle are ensured.
Drawings
Fig. 1 is a flowchart illustrating a high voltage discharge control method of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for controlling the high voltage discharge of an electric vehicle according to another embodiment of the present invention
Fig. 3 is a block diagram schematically illustrating a high voltage discharge control apparatus of an electric vehicle according to an embodiment of the present invention;
fig. 4 is a block schematic diagram of an electric vehicle according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
A high-voltage power-off control method and apparatus for an electric vehicle and an electric vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a high voltage power-down control method of an electric vehicle according to an embodiment of the present invention, as shown in fig. 1, the high voltage power-down control method of the electric vehicle includes the following steps:
s101, detecting whether CAN communication of the high-voltage distribution box is abnormal or not and detecting whether a low-voltage power supply of the high-voltage distribution box is abnormal or not.
That is, the CAN communication and the low voltage power supply of the high voltage distribution box are detected to determine whether the CAN communication and the low voltage power supply of the high voltage distribution box are abnormal.
The CAN communication of the high-voltage distribution box CAN be detected in various modes.
As an example, when the CAN communication of the high voltage distribution box is interrupted, the CAN communication of the high voltage distribution box is considered to be abnormal.
As another example, whether the CAN communication interruption time of the high-voltage distribution box is greater than or equal to a third preset time is detected, and if the CAN communication interruption time of the high-voltage distribution box is greater than or equal to the third preset time, the CAN communication of the high-voltage distribution box is judged to be abnormal; and if the CAN communication interruption time of the high-voltage distribution box is less than the third preset time, judging that the CAN communication of the high-voltage distribution box is normal, and thus finishing the detection on whether the CAN communication of the high-voltage distribution box is abnormal.
As another example, after the CAN communication interruption of the high-voltage distribution box is detected, whether the CAN communication interruption time of the high-voltage distribution box is greater than or equal to 5S is judged, and if yes, the CAN communication of the high-voltage distribution box is considered to be interrupted; and if not, the CAN communication of the high-voltage distribution box is normal.
The method for detecting whether the low-voltage power supply of the high-voltage distribution box is abnormal or not can be various.
As an example, the voltage of the low voltage power supply is detected, and whether the voltage of the low voltage power supply is less than a preset voltage is judged; and if the voltage of the low-voltage power supply is less than the preset voltage and the duration time reaches the fourth preset time, judging that the low-voltage power supply of the high-voltage distribution box is abnormal.
As another example, the preset voltage threshold is 18V, the preset time threshold is 5S, and in the process of detecting the voltage of the low-voltage power supply, whether the low-voltage power supply of the high-voltage distribution box is abnormal is determined according to the preset voltage threshold and the preset time threshold, wherein when the voltage of the low-voltage power supply is less than 18V and the duration time reaches 5S, the low-voltage power supply of the high-voltage distribution box is determined to be abnormal; otherwise, the low-voltage power supply of the high-voltage distribution box is considered to be normal.
And S102, if the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, starting the high-voltage to low-voltage auxiliary power supply to supply auxiliary power to the control unit of the high-voltage distribution box, sending a fault message to the vehicle control unit to wait for the vehicle control unit to send a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to execute power-off operation when the waiting time reaches a first preset time.
That is to say, when the low-voltage power supply of the high-voltage distribution box is abnormal and the CAN communication of the high-voltage distribution box is normal, the high-voltage to low-voltage auxiliary power supply is started to supply power to the control unit of the high-voltage distribution box in an auxiliary manner, and a fault message is sent to the vehicle control unit to wait for the vehicle control unit to issue a control instruction; then, after the waiting time reaches a first preset time, controlling the corresponding high-voltage device of the high-voltage distribution box to execute a power-off operation.
As an example, when the CAN communication of the high-voltage distribution box is normal, and the duration time that the low voltage of the high-voltage distribution box is lower than 18V is greater than or equal to 5S, starting the high-voltage to low-voltage auxiliary power supply, and sending a fault message to the vehicle control unit to wait for the vehicle control unit to issue a control instruction, at this time, judging whether the waiting time is greater than or equal to 50S, if so, controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-down operation, if not, namely, the vehicle control unit issues a corresponding control instruction, performing corresponding operation according to the control instruction issued by the vehicle control unit, and returning to continuously monitoring the CAN communication state of the high-voltage distribution box and the state of the low-voltage power supply.
And S103, if the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is abnormal, starting the high-voltage to low-voltage auxiliary power supply to supply power to the control unit of the high-voltage distribution box in an auxiliary mode, and controlling the corresponding high-voltage device of the high-voltage distribution box to execute power-off operation when the duration of the auxiliary power supply of the high-voltage to low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time.
That is to say, when the low voltage power supply of high voltage distribution box is unusual, and the CAN communication is unusual, start high pressure and change low voltage auxiliary power supply and carry out supplementary power supply to the control unit of high voltage distribution box to, judge whether the duration that high pressure changes low voltage auxiliary power supply and carry out supplementary power supply to the control unit of high voltage distribution box is more than or equal to the second and predetermine the time, if yes, then control the corresponding high voltage device of high voltage distribution box and carry out the operation of cutting off the power supply.
As an example, when the low voltage of the high voltage distribution box is less than 18V and the duration is greater than or equal to 5S, and the interruption duration of the CAN communication is greater than or equal to 5S, the high voltage to low voltage auxiliary power supply is started to supply power to the control unit of the high voltage distribution box in an auxiliary manner, meanwhile, whether the duration of the auxiliary power supply of the high voltage to low voltage auxiliary power supply for supplying power to the control unit of the high voltage distribution box is greater than 30S is judged, and if the judgment result is yes, the corresponding high voltage device of the high voltage distribution box is controlled to perform power-down operation.
Among them, there are various ways of controlling the corresponding high-voltage devices of the high-voltage distribution box to perform the power-off operation.
As an example, controlling the respective high voltage devices of the high voltage distribution box to perform a power down operation includes: and sending a non-enabling signal to the corresponding high-voltage device of the high-voltage distribution box so as to control the corresponding high-voltage device of the high-voltage distribution box to be powered off, disconnecting the relay of the corresponding high-voltage device after waiting for the fifth preset time, and then disconnecting the main positive relay of the high-voltage power supply loop.
As another example, controlling the respective high voltage devices of the high voltage distribution box to perform a power down operation includes: and sending an disable signal to the oil pump, the air pump, the DCDC and the electric accessory, powering down the oil pump, the air pump, the DCDC and the electric accessory, disconnecting relays of the oil pump, the air pump, the DCDC and the electric accessory after waiting for 2S, and then disconnecting a main positive relay of the high-voltage power supply loop.
When the CAN communication of the high-voltage distribution box is detected to be normal and the low-voltage power supply of the high-voltage distribution box is detected to be normal, or the CAN communication of the high-voltage distribution box is detected to be abnormal and the low-voltage power supply of the high-voltage distribution box is detected to be normal, the processing modes CAN be various.
As an example, when it is detected that the high voltage distribution and CAN communication is normal and the low voltage power supply of the high voltage distribution box is normal, or that the CAN communication of the high voltage distribution box is abnormal and the low voltage power supply of the high voltage distribution box is normal, it returns to continue detecting whether the CAN communication of the high voltage distribution box is abnormal and whether the low voltage power supply of the high voltage distribution box is abnormal.
In a specific embodiment of the present invention, as shown in fig. 2, a high voltage power-down control method of an electric vehicle includes the steps of:
s201, start.
And S202, detecting whether the CAN communication and the low-voltage power supply of the high-voltage distribution box are abnormal or not, if the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is normal, returning to the step S202, if the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is normal, returning to the step S202, if the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, executing the step S203, and if the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is abnormal, executing the step S206.
And S203, starting the high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on the control unit of the high-voltage distribution box, and sending a fault message to the vehicle control unit.
And S204, waiting for the whole vehicle controller to issue a control command.
S205, judging whether the waiting time is more than 50S, if yes, executing the step S208, and if no, returning to the step S202.
And S206, starting the high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on the control unit of the high-voltage distribution box.
And S207, judging whether the duration of the auxiliary power supply of the high-voltage to low-voltage auxiliary power supply to the control unit of the high-voltage distribution box is greater than or equal to 30S, if so, executing a step S208, and if not, returning to the step S202.
And S208, sending a non-enabling signal to the corresponding high-voltage device of the high-voltage distribution box.
S209, wait for 2S.
And S210, opening the relay of the corresponding high-voltage device.
And S211, disconnecting a main positive relay of the high-voltage power supply loop.
In summary, according to the high voltage power-off control method of the electric vehicle in the embodiment of the present invention, first, the CAN communication and the low voltage power supply of the high voltage distribution box are detected to determine whether the CAN communication of the high voltage distribution box is abnormal and determine whether the low voltage power supply of the high voltage distribution box is abnormal; when CAN communication of the high-voltage distribution box is in production and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage-to-low-voltage auxiliary power supply to supply power to a control unit of the high-voltage distribution box in an auxiliary mode, sending a fault message to a vehicle control unit to wait for the vehicle control unit to send a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to execute power-off operation when the waiting time reaches a first preset time; when CAN communication of the high-voltage distribution box is abnormal and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the duration of the auxiliary power supply of the high-voltage to low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time; therefore, the high voltage of the electric vehicle is safely powered off under the condition that the high voltage distribution box is interrupted by a low voltage terminal or CAN communication, and the stability of the whole vehicle and the service life of components of the electric vehicle are guaranteed.
In order to implement the above embodiment, as shown in fig. 3, a high voltage power down control device for an electric vehicle according to an embodiment of the present invention includes: the device comprises a communication detection module 10, a power supply detection module 20 and a power-down control module 30.
The communication detection module 10 detects whether the CAN communication of the high-voltage distribution box is abnormal; the power supply detection module 20 detects whether the low-voltage power supply of the high-voltage distribution box is abnormal; the power-off control module 30 starts a high-voltage-to-low-voltage auxiliary power supply to supply power to the control unit of the high-voltage distribution box in an auxiliary manner when the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, sends a fault message to the vehicle control unit to wait for the vehicle control unit to issue a control instruction, and controls a corresponding high-voltage device of the high-voltage distribution box to execute power-off operation when the waiting time reaches a first preset time; the power-off control module 30 is further configured to, when the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is abnormal, start the high-voltage-to-low-voltage auxiliary power supply to perform auxiliary power supply on the control unit of the high-voltage distribution box, and control a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the duration of the auxiliary power supply of the high-voltage-to-low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time.
The corresponding high-voltage devices of the high-voltage distribution box may comprise a plurality of types.
As an example, the respective high voltage devices of the high voltage distribution box include an oil pump device, an air pump device, a DC/DC device, an electric heating device, an electric defrosting device, and an air conditioning device.
In some embodiments, the communication detection module 10 detects whether the CAN communication of the high voltage distribution box is abnormal by detecting whether the CAN communication interruption time of the high voltage distribution box is greater than or equal to a third preset time, and the power detection module detects whether the low voltage power supply of the high voltage distribution box is abnormal by detecting whether the duration of the voltage of the low voltage power supply being less than the preset voltage reaches a fourth preset time.
In some embodiments, the power-down control module 30 sends a disable signal to the corresponding high-voltage device of the high-voltage distribution box to control the corresponding high-voltage device of the high-voltage distribution box to power down when controlling the corresponding high-voltage device of the high-voltage distribution box to perform a power-down operation, and turns off the relay of the corresponding high-voltage device after waiting for a fifth preset time, and then turns off the main positive relay of the high-voltage power supply loop.
It should be noted that the above description about the high voltage power down control method of the electric vehicle in fig. 1 is also applicable to the high voltage power down control device of the electric vehicle, and is not repeated herein.
In summary, according to the high voltage power down control device of the electric vehicle in the embodiment of the present invention, the communication detection module detects whether the CAN communication of the high voltage distribution box is abnormal, and the power detection module detects whether the low voltage power supply of the high voltage distribution box is abnormal; when CAN communication of the high-voltage distribution box is normal and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage-to-low-voltage auxiliary power supply through a power-down control module to perform auxiliary power supply on a control unit of the high-voltage distribution box, sending a fault message to a vehicle controller to wait for the vehicle controller to issue a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-down operation when the waiting time reaches a first preset time; when CAN communication of the high-voltage distribution box is abnormal and a low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage-to-low-voltage auxiliary power supply through a power-down control module to perform auxiliary power supply on a control unit of the high-voltage distribution box, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-down operation when the duration of the auxiliary power supply of the high-voltage-to-low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time; therefore, the high voltage of the electric vehicle is safely powered off under the condition that the high voltage distribution box is interrupted by a low voltage terminal or CAN communication, and the stability of the whole vehicle and the service life of components of the electric vehicle are guaranteed.
To implement the above embodiment, as shown in fig. 4, the electric vehicle 100 according to the present invention includes the electric vehicle high-voltage power-down control device 200.
According to the electric vehicle 100 provided by the embodiment of the invention, the high-voltage power-down control device 200 of the electric vehicle is loaded, so that the high voltage of the electric vehicle is safely powered down under the condition that a low-voltage terminal outside a high-voltage distribution box or CAN communication is interrupted, and the stability of the whole vehicle and the service life of components of the electric vehicle are ensured.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A high voltage power down control method of an electric vehicle, characterized by comprising the steps of:
detecting whether CAN communication of a high-voltage distribution box is abnormal or not, and detecting whether a low-voltage power supply of the high-voltage distribution box is abnormal or not;
if the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box, sending a fault message to a vehicle control unit to wait for the vehicle control unit to issue a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the waiting time reaches a first preset time;
if the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is abnormal, starting the high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on the control unit of the high-voltage distribution box, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the duration of the auxiliary power supply of the high-voltage to low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time;
when the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is normal, or the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is normal, returning to continuously detect whether the CAN communication of the high-voltage distribution box is abnormal and whether the low-voltage power supply of the high-voltage distribution box is abnormal.
2. The high voltage power-off control method of an electric vehicle according to claim 1, wherein detecting whether CAN communication of the high voltage distribution box is abnormal comprises:
detecting whether the CAN communication interruption time of the high-voltage distribution box is more than or equal to a third preset time or not;
if the CAN communication interruption time of the high-voltage distribution box is more than or equal to a third preset time, judging that the CAN communication of the high-voltage distribution box is abnormal;
and if the CAN communication interruption time of the high-voltage distribution box is less than a third preset time, judging that the CAN communication of the high-voltage distribution box is normal.
3. The high voltage power down control method of an electric vehicle according to claim 2, wherein detecting whether a low voltage power supply of the high voltage distribution box is abnormal includes:
detecting the voltage of the low-voltage power supply and judging whether the voltage of the low-voltage power supply is smaller than a preset voltage or not;
and if the voltage of the low-voltage power supply is less than the preset voltage and the duration time reaches the fourth preset time, judging that the low-voltage power supply of the high-voltage distribution box is abnormal.
4. A high voltage power down control method of an electric vehicle according to any one of claims 1 to 3, wherein controlling the respective high voltage devices of the high voltage distribution box to perform power down operations includes:
and sending a non-enabling signal to the corresponding high-voltage device of the high-voltage distribution box so as to control the corresponding high-voltage device of the high-voltage distribution box to be powered off, and disconnecting the relay of the corresponding high-voltage device after waiting for a fifth preset time, and then disconnecting the main positive relay of the high-voltage power supply loop.
5. A high-voltage power-down control apparatus of an electric vehicle, characterized by comprising:
the communication detection module is used for detecting whether CAN communication of the high-voltage distribution box is abnormal or not;
the power supply detection module is used for detecting whether the low-voltage power supply of the high-voltage distribution box is abnormal or not;
the power-off control module is used for starting a high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on a control unit of the high-voltage distribution box when the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is abnormal, sending a fault message to a vehicle controller to wait for the vehicle controller to issue a control instruction, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the waiting time reaches a first preset time;
the power-off control module is further used for starting the high-voltage to low-voltage auxiliary power supply to perform auxiliary power supply on the control unit of the high-voltage distribution box when the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is abnormal, and controlling a corresponding high-voltage device of the high-voltage distribution box to perform power-off operation when the duration of the auxiliary power supply of the high-voltage to low-voltage auxiliary power supply to the control unit of the high-voltage distribution box reaches a second preset time;
when the CAN communication of the high-voltage distribution box is normal and the low-voltage power supply of the high-voltage distribution box is normal, or the CAN communication of the high-voltage distribution box is abnormal and the low-voltage power supply of the high-voltage distribution box is normal, returning to continuously detect whether the CAN communication of the high-voltage distribution box is abnormal and whether the low-voltage power supply of the high-voltage distribution box is abnormal.
6. The high voltage power down control apparatus of an electric vehicle according to claim 5, wherein the communication detecting module determines whether the CAN communication of the high voltage distribution box is abnormal by detecting whether a CAN communication interruption time of the high voltage distribution box is equal to or greater than a third preset time, and the power detecting module determines whether the low voltage power supply of the high voltage distribution box is abnormal by detecting whether a duration time during which the voltage of the low voltage power supply is less than a preset voltage reaches a fourth preset time.
7. The high voltage power-down control apparatus of an electric vehicle according to claim 5 or 6, wherein the power-down control module, when controlling the corresponding high voltage devices of the high voltage distribution box to perform a power-down operation, first sends a non-enable signal to the corresponding high voltage devices of the high voltage distribution box to control the corresponding high voltage devices of the high voltage distribution box to power down, and after waiting for a fifth preset time, turns off the relays of the corresponding high voltage devices, and then turns off the main positive relay of the high voltage power supply loop.
8. The high voltage power down control apparatus of an electric vehicle according to claim 5, wherein the respective high voltage devices of the high voltage distribution box include an oil pump device, an air pump device, a DC/DC device, an electric heating device, an electric defrosting device, and an air conditioning device.
9. An electric vehicle characterized by comprising the high voltage power down control apparatus of the electric vehicle according to any one of claims 5 to 8.
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| CN113640695A (en) * | 2020-05-11 | 2021-11-12 | 杭州海康汽车软件有限公司 | Detection device and detection method |
| CN113119997B (en) * | 2021-04-16 | 2022-08-19 | 北京理工中云智车科技有限公司 | Safety control system for wire-controlled chassis of unmanned vehicle |
| CN113954773B (en) * | 2021-10-29 | 2023-10-24 | 东风商用车有限公司 | Commercial vehicle low-voltage power supply device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013133815A2 (en) * | 2012-03-07 | 2013-09-12 | International Truck Intellectual Property Company, Llc | Vehicle electrical system state controller |
| CN108177525A (en) * | 2017-12-28 | 2018-06-19 | 上汽通用五菱汽车股份有限公司 | Electric vehicle and power accumulator safety management control method |
| CN108973685A (en) * | 2017-06-02 | 2018-12-11 | 湖南中车时代电动汽车股份有限公司 | A kind of delay cut-off control circuit and method for fuel cell integral new-energy passenger |
| CN108995536A (en) * | 2018-08-13 | 2018-12-14 | 北京新能源汽车股份有限公司 | Electric control method, control device, control equipment and automobile under a kind of high pressure |
| CN208602327U (en) * | 2018-08-15 | 2019-03-15 | 河南航瑞电子科技有限公司 | A kind of new-energy automobile high voltage distribution box |
| CN109484184A (en) * | 2018-11-27 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | The dynamical system and its control method of electric car, electric car |
-
2019
- 2019-06-27 CN CN201910569071.6A patent/CN110356237B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013133815A2 (en) * | 2012-03-07 | 2013-09-12 | International Truck Intellectual Property Company, Llc | Vehicle electrical system state controller |
| CN108973685A (en) * | 2017-06-02 | 2018-12-11 | 湖南中车时代电动汽车股份有限公司 | A kind of delay cut-off control circuit and method for fuel cell integral new-energy passenger |
| CN108177525A (en) * | 2017-12-28 | 2018-06-19 | 上汽通用五菱汽车股份有限公司 | Electric vehicle and power accumulator safety management control method |
| CN108995536A (en) * | 2018-08-13 | 2018-12-14 | 北京新能源汽车股份有限公司 | Electric control method, control device, control equipment and automobile under a kind of high pressure |
| CN208602327U (en) * | 2018-08-15 | 2019-03-15 | 河南航瑞电子科技有限公司 | A kind of new-energy automobile high voltage distribution box |
| CN109484184A (en) * | 2018-11-27 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | The dynamical system and its control method of electric car, electric car |
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