CN107901762B - Method and system for treatment of discharge failure of electric vehicle - Google Patents

Abstract

The invention provides a method and a system for processing the discharge failure of an electric automobile. The processing method comprises the following steps: a bleeding monitoring step of acquiring a bus voltage of a motor of the electric vehicle when the electric vehicle is powered off; a failure confirmation step of confirming whether the discharge function of the electric automobile fails or not by comparing the bus voltage obtained in the discharge monitoring step with a preset voltage; and safety protection, namely when the discharge function of the electric automobile fails, locking the front hatch cover. According to the method for processing the power-off discharge failure of the electric automobile, whether the discharge function of the electric automobile fails or not is confirmed by comparing the acquired bus voltage of the motor of the electric automobile with the preset voltage, and when the discharge function of the electric automobile fails, the front hatch cover of the motor is locked, related personnel are forbidden to open the front hatch cover, so that the related personnel are prevented from touching a high-voltage part, potential safety hazards caused by the failure of the discharge function are avoided, and the safety of the power-off process of the electric automobile is improved.

Description

Method and system for treatment of discharge failure of electric vehicle

technical field

The present invention relates to the technical field of electric vehicles, and in particular, to a method and system for dealing with a discharge failure of an electric vehicle.

Background technique

Electric vehicles are one of the strategic emerging industries in my country, and electric vehicles are gradually replacing traditional fuel vehicles. Compared with traditional fuel vehicles, electric vehicles have high voltage, so high-voltage safety issues must be considered. When the car is powered off, the capacitor voltage discharge function in the motor controller ensures that the voltage of the high-voltage circuit drops below the safe voltage to prevent electric shocks. At present, electric vehicles all have the function of discharging under high voltage, but once the discharge fails, some parts of the electric vehicle are in a high voltage state, resulting in safety accidents when people touch them.

SUMMARY OF THE INVENTION

In view of this, the present invention proposes a method and system for handling the failure of the power-off and discharge of an electric vehicle, aiming to solve the problem of safety accidents caused by the failure of the power-off and discharge of the existing electric vehicle.

In one aspect, the present invention proposes a method for processing the failure of a power-off discharge of an electric vehicle, the processing method comprising: a discharge monitoring step, obtaining the bus voltage of an electric motor of the electric vehicle when the electric vehicle is powered off; a failure confirmation step, by adding The bus voltage obtained in the discharge monitoring step is compared with its corresponding preset voltage to confirm whether the discharge function of the electric vehicle fails; in the safety protection step, when the discharge function of the electric vehicle fails, the electric vehicle is locked. The front hatch of the car.

Further, in the above-mentioned method for processing the failure of power-off and discharge of the electric vehicle, in the discharge monitoring step, the bus voltage of the electric motor is collected in real time through the battery management system of the electric vehicle or the motor controller of the electric motor. .

Further, in the above-mentioned method for dealing with the failure of power-off and discharge of an electric vehicle, in the discharge monitoring step, the bus voltage of the motor is obtained by collecting real-time signals from the voltage sensor of the motor.

Further, the above-mentioned method for dealing with a discharge failure of power-off and discharge of an electric vehicle further includes after the failure confirmation step: a failure alarm step, when the discharge function of the electric vehicle fails, performing a discharge failure alarm and/or at the The reminder display on the instrument meter of the electric vehicle.

Further, the above-mentioned method for dealing with the failure of the power-off and discharge of the electric vehicle, after the safety protection step, further includes: a failure maintenance step, by repairing the electric vehicle, confirming and eliminating the failure of the discharge function of the electric vehicle. Fault; unlocking step, unlocking the front hatch after confirming and eliminating the fault.

The method for dealing with the failure of the electric vehicle's power-off relief provided by the present invention is to confirm whether the relief function of the electric vehicle fails by comparing the obtained bus voltage of the motor of the electric vehicle with its corresponding preset voltage, and to determine whether the relief function of the electric vehicle is ineffective. During the function, the front hatch of the motor is locked, so as to prohibit the relevant personnel from opening the front hatch, thereby preventing the relevant personnel from touching the high-voltage components, thereby avoiding the potential safety hazard caused by the failure of the discharge function, and improving the power-off of the electric vehicle. process security.

In particular, in the method for dealing with the discharge failure of electric vehicle power off provided in the present invention, when the discharge function of the electric vehicle fails, a discharge failure alarm is performed or a reminder display is displayed on the instrument table of the electric vehicle, so as to remind relevant personnel. The failure of the discharge function, and then remind the relevant personnel not to touch the high-voltage components of the electric vehicle, so as to avoid the occurrence of safety accidents.

Further, the method for dealing with the failure of the power-off and discharge of the electric vehicle provided in the present invention eliminates the failure of the discharge failure by repairing the electric vehicle, so as to solve the problem of the failure of the discharge function of the electric vehicle, thereby avoiding the safety caused by the discharge failure. At the same time, the lock of the front hatch is released after the failure of the discharge failure is eliminated, thereby facilitating the subsequent use and maintenance of the electric vehicle.

On the other hand, the present invention provides an electric vehicle power-off discharge failure processing system, the processing system includes: a discharge monitoring module for obtaining the bus voltage of the electric motor of the electric vehicle when the electric vehicle is powered off; a failure confirmation module , for confirming whether the discharge function of the electric vehicle fails by comparing the bus voltage obtained by the discharge monitoring module with its corresponding preset voltage; the safety protection module is used when the discharge function of the electric vehicle fails. In the event of failure, the front hatch of the electric vehicle is locked.

Further, in the above-mentioned electric vehicle power-off discharge failure processing system, the discharge monitoring module collects the bus voltage of the electric motor in real time through the battery management system of the electric vehicle or the motor controller of the electric motor.

Further, in the above-mentioned electric vehicle power-off discharge failure processing system, the discharge monitoring module acquires the bus voltage of the motor by collecting real-time signals from the voltage sensor of the motor.

Further, in the above-mentioned electric vehicle power-off discharge failure processing system, the processing system further includes: a failure alarm module, configured to perform a discharge failure alarm when the discharge function of the electric vehicle fails and/or in the electric vehicle A reminder is displayed on the instrument meter of the car.

Further, in the above-mentioned electric vehicle power-off discharge failure processing system, the processing system further includes: a failure maintenance module, which is used for confirming and eliminating the failure of the discharge function of the electric vehicle by repairing the electric vehicle. The failure of the discharge function of the electric vehicle fails; the unlocking module is used for unlocking the front hatch after confirming and eliminating the failure.

Since the processing method embodiment has the above effects, the processing system embodiment also has corresponding technical effects.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a schematic flowchart of a method for processing a power-off discharge failure of an electric vehicle provided by an embodiment of the present invention;

FIG. 2 is a structural block diagram of a system for dealing with a power-off discharge failure of an electric vehicle according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Method example:

Referring to FIG. 1 , which is a schematic flowchart of a method for processing a power-off and discharge failure of an electric vehicle provided by an embodiment of the present invention, the processing method includes the following steps:

In the discharge monitoring step S1, the bus voltage of the electric motor of the electric vehicle is obtained when the electric vehicle is powered off.

Specifically, when the electric vehicle is discharged, that is, when the driver or other operator turns the key of the electric vehicle to the OFF state when the electric vehicle is stopped, the whole vehicle starts to discharge, and the battery management system ( BATTERY MANAGEMENT SYSTEM, BMS) or the motor controller of the electric vehicle collects real-time signals from the voltage sensor of the motor, so as to collect the bus voltage of the motor of the electric vehicle in real time, and then obtain the real-time bus voltage of the motor; The bus voltage after discharge is not collected due to errors. Preferably, the bus voltage can also be collected before the electric vehicle starts to be powered off; wherein, the bus voltage can be collected through a CAN communication line or a hard wire.

In the failure confirmation step S2, by comparing the bus voltage obtained in the discharge monitoring step with the preset voltage, it is confirmed whether the discharge function of the electric vehicle fails.

Specifically, by comparing the bus voltage obtained in the discharge monitoring step S1 with the preset voltage, when the bus voltage obtained in the discharge monitoring step S1 is greater than the preset voltage or the bus voltage obtained in the discharge monitoring step S1 is the same as the preset voltage When the difference between the voltages is greater than the threshold value, it is confirmed that the bleeder function of the electric vehicle fails; otherwise, the bus voltage obtained without the bleeder function of the electric vehicle fails is a safe voltage. Wherein, the preset voltage and the threshold can be determined according to the actual situation, and are not limited in this embodiment; it is well known to those skilled in the art that, according to the national standard GBT 31498 for electric vehicles, after the whole vehicle starts to discharge, the bus voltage It is reduced to below 60V after 2 seconds of starting to discharge; therefore, it is preferable to compare the bus voltage when the vehicle starts to discharge for 2 seconds or after 2 seconds with the preset voltage. At this time, the preset voltage is 60V. If the bus voltage is greater than the preset voltage If the voltage is set to 60V, it is confirmed that the discharge function of the electric vehicle fails.

In the failure alarm step S3, when the discharge function of the electric vehicle fails, a discharge failure alarm is performed and/or a reminder is displayed on the instrument meter of the electric vehicle.

Specifically, when it is confirmed in the failure confirmation step S2 that the bleeder function of the electric vehicle fails, a bleeder failure alarm such as an audible alarm or flashing of a warning light is performed, or a bleeder failure display is performed on the instrument meter of the electric vehicle, In order to remind the driver, maintenance personnel or other personnel that the discharge function of the electric vehicle is invalid, and then remind the relevant personnel not to touch the high-voltage components of the electric vehicle, so as to avoid the occurrence of safety accidents; of course, the discharge failure alarm and in the electric vehicle The display on the instrument watch can be carried out at the same time or one of the forms of reminder; it is well known in the art that when the electric vehicle goes to sleep, the instrument watch will stop working, so in order to facilitate the reminder display on the instrument watch, it is necessary to Reminder before the electric vehicle goes to sleep.

In the safety protection step S4, when the discharge function of the electric vehicle fails, the front hatch of the electric vehicle is locked.

Specifically, in order to prevent the high voltage remaining in the controller of the electric motor from being contacted by relevant personnel, when it is confirmed in the failure confirmation step S2 that the discharge function of the electric vehicle fails, the front hatch of the electric vehicle is locked to avoid the electric vehicle. Opening of the front hatch; wherein, the locking of the front hatch can be implemented by components such as a locking valve, so as to realize the prohibition of opening the front hatch; it is well known to those skilled in the art that the electric motor of an electric vehicle and its The controller is arranged under the front hatch of the electric vehicle, and the locking of the front hatch prevents the relevant personnel from touching the high-voltage components such as the controller of the electric motor, thereby avoiding the occurrence of safety accidents.

In the failure maintenance step S5, when the discharge function of the electric vehicle fails, after the electric vehicle is repaired, the failure of the discharge function failure is confirmed and eliminated.

Specifically, if the discharge function of the electric vehicle fails, after the front hatch is locked in the safety protection step S4, the electric vehicle is repaired, and the failure of the discharge function is confirmed and eliminated, so as to solve the failure of the discharge function of the electric vehicle In order to avoid the safety accident caused by the leakage failure; in order to further improve the safety of the electric vehicle, preferably, after the fault is eliminated, it is detected again to ensure the elimination of the fault; further preferably, the electric vehicle can be The car is powered on and off, and the bus voltage is collected and compared when the power is off, so as to detect whether the fault is eliminated. If the bus voltage is lower than the preset voltage, the fault is eliminated.

In the unlocking step S6, after the failure maintenance step S5 confirms and removes the fault, the locking of the front hatch is released.

Specifically, after the failure maintenance step S5 confirms and eliminates the failure of the discharge function, the locking of the front hatch is released, thereby facilitating the subsequent use and maintenance of the electric vehicle.

There is no sequence between the failure alarm step S3 and the safety protection step S4.

Obviously, it can be obtained that, in the method for dealing with the failure of the power-off and discharge of the electric vehicle provided in this embodiment, the obtained bus voltage of the electric motor of the electric vehicle is compared with the preset voltage to confirm whether the discharge function of the electric vehicle fails, and During the discharge function of the electric vehicle, the front hatch of the electric motor is locked to prevent the relevant personnel from opening the front hatch, thereby preventing the relevant personnel from touching the high-voltage components, thereby avoiding the safety hazard caused by the failure of the discharge function. The safety of the power-off process of the electric vehicle is improved.

In particular, the method for dealing with the discharge failure of an electric vehicle when the electric vehicle is powered off is provided in this embodiment. When the discharge function of the electric vehicle fails, a discharge failure alarm is performed or a reminder display is displayed on the instrument meter of the electric vehicle, so as to remind the relevant personnel to discharge. The failure of the discharge function, and then remind the relevant personnel not to touch the high-voltage components of the electric vehicle, so as to avoid the occurrence of safety accidents.

Further, the method for dealing with the failure of the discharge of the electric vehicle provided in this embodiment is to eliminate the failure of the discharge failure by repairing the electric vehicle, so as to solve the problem of the failure of the discharge function of the electric vehicle, thereby avoiding the failure caused by the discharge failure. Safety accidents; at the same time, the lock of the front hatch is released after the failure of the discharge failure is eliminated, thereby facilitating the subsequent use and maintenance of the electric vehicle.

System example:

Referring to FIG. 2 , which is a structural block diagram of a system for processing a power-off discharge failure of an electric vehicle provided by an embodiment of the present invention, the system includes:

The discharge monitoring module 100 is used to obtain the bus voltage of the electric motor of the electric vehicle when the electric vehicle is powered off;

The failure confirmation module 200 is used for confirming whether the discharge function of the electric vehicle fails by comparing the bus voltage obtained by the discharge monitoring module 100 with the preset voltage;

The safety protection module 400 is used for locking the front hatch of the electric vehicle when the discharge function of the electric vehicle fails.

Preferably, the discharge monitoring module collects the bus voltage of the electric motor in real time through the battery management system of the electric vehicle or the motor controller of the electric motor.

Preferably, the discharge monitoring module acquires the bus voltage of the motor by collecting real-time signals from the voltage sensor of the motor.

Preferably, the processing system further includes: a failure alarm module 300, which is used for performing a leakage failure alarm and/or prompting and displaying on the instrument meter of the electric vehicle when the leakage function of the electric vehicle fails.

Further preferably, the processing system further includes: a failure maintenance module 500, configured to confirm and eliminate the failure of the discharge function of the electric vehicle after repairing the electric vehicle when the discharge function of the electric vehicle fails; The locking module 600 is used for releasing the locking of the front hatch after confirming and eliminating the fault.

The specific implementation process of the discharge monitoring module 100 , the failure confirmation module 200 and the safety protection module 300 may refer to the foregoing method embodiments, which will not be repeated in this embodiment.

Since the processing method embodiment has the above effects, the processing system embodiment also has corresponding technical effects.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (8)

1. a method for processing the failure of electric vehicle power off and discharge, is characterized in that, comprises: In the discharge monitoring step, the bus voltage of the electric motor of the electric vehicle is obtained when the electric vehicle is powered off; the bus voltage of the electric motor is collected in real time through the battery management system of the electric vehicle or the motor controller of the electric motor; The failure confirmation step is to confirm whether the discharge function of the electric vehicle fails by comparing the bus voltage obtained in the discharge monitoring step with its corresponding preset voltage; and by comparing the bus voltage obtained in the discharge monitoring step with the preset voltage. Set the voltage to be compared, when the bus voltage obtained by the discharge monitoring step is greater than the preset voltage or the difference between the bus voltage obtained by the discharge monitoring step and the preset voltage is greater than the threshold value, then confirm the leakage of the electric vehicle. The release function fails; a safety protection step, locking the front hatch of the electric vehicle when the discharge function of the electric vehicle fails; The failure maintenance step is to confirm and eliminate the failure of the discharge function of the electric vehicle by repairing the electric vehicle. After eliminating the fault, the electric vehicle is powered on and off, and collected when the power is off. And compare the bus voltage to detect whether the fault is eliminated, if the bus voltage is lower than the preset voltage, the fault is eliminated; In the unlocking step, the locking of the front hatch is released after the failure is confirmed and eliminated in the failure maintenance step. 2. The method for processing electric vehicle power-off discharge failure according to claim 1, characterized in that, in the discharge monitoring step, The bus voltage of the motor is acquired by collecting real-time signals from the voltage sensor of the motor. 3. The method for processing electric vehicle power off and discharge failure according to claim 1, characterized in that, after the failure confirmation step, further comprising: In the failure alarming step, when the bleeder function of the electric vehicle fails, a bleeder failure alarm is performed. 4. The method for treating the failure of power-off and discharge of an electric vehicle according to claim 3, characterized in that, In the failure alarming step, when the discharge function of the electric vehicle fails, a reminder is displayed on the instrument meter of the electric vehicle, so as to perform a discharge failure alarm. 5. An electric vehicle power-off discharge failure processing system, characterized in that, comprising: The discharge monitoring module is used to obtain the bus voltage of the electric motor of the electric vehicle when the electric vehicle is powered off; the bus voltage of the electric motor is collected in real time through the battery management system of the electric vehicle or the motor controller of the electric motor; A failure confirmation module, configured to confirm whether the discharge function of the electric vehicle fails by comparing the bus voltage obtained by the discharge monitoring module with its corresponding preset voltage; The bus voltage obtained by the module is compared with the preset voltage, when the bus voltage obtained by the discharge monitoring module is greater than the preset voltage or the difference between the bus voltage obtained by the discharge monitoring module and the preset voltage is greater than a threshold value , it is confirmed that the discharge function of the electric vehicle is invalid; a safety protection module for locking the front hatch of the electric vehicle when the discharge function of the electric vehicle fails; The failure maintenance module is used for repairing the electric vehicle when the discharge function of the electric vehicle fails, confirming and eliminating the failure of the discharge function of the electric vehicle, and after eliminating the fault, by correcting The electric vehicle is powered on and off, and collects and compares the bus voltage when powered off to detect whether the fault is eliminated. If the bus voltage is lower than the preset voltage, the fault is eliminated; The unlocking module is used for unlocking the front hatch after confirming and eliminating the fault. 6. The electric vehicle power-off discharge failure processing system according to claim 5, characterized in that, The bleeder monitoring module acquires the bus voltage of the motor by collecting real-time signals from the voltage sensor of the motor. 7. The electric vehicle power-off discharge failure processing system according to claim 5, further comprising: The failure alarm module is used for performing a leakage failure alarm when the leakage function of the electric vehicle fails. 8. The electric vehicle power-off discharge failure processing system according to claim 7, characterized in that, The failure alarm module is also used to remind and display on the instrument meter of the electric vehicle when the discharge function of the electric vehicle fails, so as to perform a discharge failure alarm.

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