CN111900966B - Method and device for detecting driving circuit and vehicle - Google Patents

Method and device for detecting driving circuit and vehicle Download PDF

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Publication number
CN111900966B
CN111900966B CN202010694104.2A CN202010694104A CN111900966B CN 111900966 B CN111900966 B CN 111900966B CN 202010694104 A CN202010694104 A CN 202010694104A CN 111900966 B CN111900966 B CN 111900966B
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drive
state
contactor
power
powered
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CN111900966A (en
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刘东旭
颜广博
刘擎宇
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K2017/515—Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present disclosure relates to a method, an apparatus and a vehicle for detecting a driving circuit, which are applied to a driving circuit of a contactor, the driving circuit including: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the method comprising: if an electrifying instruction is received, controlling the first drive and the second drive to be electrified according to a preset first sequence, determining whether the drive circuit is normal according to a first state of the contactor after the first drive is electrified and a second state of the contactor after the second drive is electrified, if an electrifying instruction is received, controlling the first drive and the second drive to be electrified according to a preset second sequence, determining whether the drive circuit is normal according to a third state of the contactor after the first drive is electrified and a fourth state of the contactor after the second drive is electrified, and if the drive circuit is abnormal, forbidding the drive circuit to be electrified. The vehicle control system can detect the state of the driving circuit, has high reliability, and improves the safety of vehicle control.

Description

Method and device for detecting driving circuit and vehicle
Technical Field
The present disclosure relates to the field of electronic control technologies, and in particular, to a method and an apparatus for detecting a driving circuit, and a vehicle.
Background
In order to reduce the environmental pollution, the green and environment-friendly electric automobile is widely applied. After the electric vehicle is started, the power battery of the vehicle is usually controlled by controlling the contactor. In order to prevent unintended contactor closing and to meet the requirements of the ASIL (english: automatic Safety integrity Level, chinese: Safety integrity Level) standard, high-side drive and low-side drive are generally used to control the contactor closing or opening. However, when abnormality occurs in the high-side drive or the low-side drive of the contactor (for example, when a short-circuit fault occurs), it is easy to cause a situation in which the contactor has been closed without a closing command being issued, or a situation in which the contactor has not been opened without an opening command being issued, which lowers the safety of vehicle control.
Disclosure of Invention
The invention aims to provide a method and a device for detecting a driving circuit and a vehicle, which are used for solving the problem of low safety degree of vehicle control in the prior art.
In order to achieve the above object, according to a first aspect of embodiments of the present disclosure, there is provided a method for detecting a driving circuit applied to a driving circuit of a contactor, the driving circuit including: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the method comprising:
if a power-on instruction is received, controlling a first drive and a second drive to be powered on according to a preset first sequence, and determining whether the drive circuit is normal or not according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is the low-side drive or the high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive;
if a power-off instruction is received, controlling the first drive and the second drive to power off according to a preset second sequence, and determining whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off;
and if the driving circuit is abnormal, forbidding the driving circuit to be electrified.
Optionally, the controlling the first driver and the second driver to be powered on according to a preset first sequence, and determining whether the driving circuit is normal according to a first state of the contactor after the first driver is powered on and a second state of the contactor after the second driver is powered on includes:
controlling the first drive to be powered on;
acquiring the first state of the contactor;
if the first state is a disconnection state, controlling the second drive to be electrified;
acquiring the second state of the contactor;
and if the second state is a closed state, determining that the driving circuit is normal.
Optionally, the controlling the first driver and the second driver to be powered on according to a preset first sequence, and determining whether the driving circuit is normal according to a first state of the contactor after the first driver is powered on and a second state of the contactor after the second driver is powered on, further includes:
if the first state is a closed state, determining that the driving circuit is abnormal;
and if the first state is an off state and the second state is an off state, determining that the driving circuit is abnormal.
Optionally, if the first state is a closed state, determining that the driving circuit is abnormal includes:
if the first state is a closed state, determining that the second drive is abnormal;
if the first state is an off state and the second state is an off state, determining that the driving circuit is abnormal includes:
and if the first state is an off state and the second state is an off state, determining that the first drive and/or the second drive are abnormal.
Optionally, the controlling the first driving and the second driving to power down according to a preset second sequence, and determining whether the driving circuit is normal according to a third state of the contactor after the first driving to power down and a fourth state of the contactor after the second driving to power down includes:
controlling the first drive to be powered down;
acquiring the third state of the contactor;
if the third state is an off state, controlling the second drive to power off;
acquiring the fourth state of the contactor;
and if the fourth state is the disconnection state, determining that the driving circuit is normal.
Optionally, the controlling the first driving and the second driving to power down according to a preset second sequence, and determining whether the driving circuit is normal according to a third state of the contactor after the first driving to power down and a fourth state of the contactor after the second driving to power down, further includes:
if the third state is a closed state, determining that the driving circuit is abnormal;
and if the third state is a closed state and the fourth state is a closed state, determining that the driving circuit is abnormal.
Optionally, if the third state is a closed state, determining that the driving circuit is abnormal includes:
if the third state is a closed state, determining that the first drive is abnormal;
if the third state is a closed state and the fourth state is a closed state, determining that the driving circuit is abnormal includes:
and if the third state is a closed state and the fourth state is a closed state, determining that the first drive and the second drive are abnormal.
According to a second aspect of the embodiments of the present disclosure, there is provided an apparatus for detecting a driving circuit applied to a driving circuit of a contactor, the driving circuit including: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the apparatus comprising:
the power-on control module is used for controlling a first drive and a second drive to be powered on according to a preset first sequence if a power-on instruction is received, and determining whether the drive circuit is normal or not according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is the low-side drive or the high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive;
the power-off control module is used for controlling the first drive and the second drive to power off according to a preset second sequence if a power-off instruction is received, and determining whether the drive circuit is normal or not according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off;
and the forbidding module is used for forbidding the driving circuit to be electrified if the driving circuit is abnormal.
Optionally, the power-up control module includes:
the power-on control submodule is used for controlling the first drive to be powered on;
the power-on acquisition sub-module is used for acquiring the first state of the contactor;
the power-on control sub-module is further configured to control the second driver to be powered on if the first state is a disconnected state;
the power-on obtaining sub-module is further configured to obtain the second state of the contactor;
and the power-on determining submodule is used for determining that the driving circuit is normal if the second state is a closed state.
Optionally, the power-up determination sub-module is further configured to:
if the first state is a closed state, determining that the driving circuit is abnormal;
and if the first state is an off state and the second state is an off state, determining that the driving circuit is abnormal.
Optionally, the power-up determining sub-module is configured to:
if the first state is a closed state, determining that the second drive is abnormal;
and if the first state is an off state and the second state is an off state, determining that the first drive and/or the second drive are abnormal.
Optionally, the power down control module comprises:
the power-off control sub-module is used for controlling the first drive power-off;
a power-off acquisition sub-module for acquiring the third state of the contactor;
the power-off control sub-module is further used for controlling the second drive to power off if the third state is a disconnected state;
the power-off acquisition sub-module is further used for acquiring the fourth state of the contactor;
and the power-off determining submodule is used for determining that the driving circuit is normal if the fourth state is a disconnected state.
Optionally, the power down determination sub-module is further configured to:
if the third state is a closed state, determining that the driving circuit is abnormal;
and if the third state is a closed state and the fourth state is a closed state, determining that the driving circuit is abnormal.
Optionally, the power down determination sub-module is to:
if the third state is a closed state, determining that the first drive is abnormal;
and if the third state is a closed state and the fourth state is a closed state, determining that the first drive and the second drive are abnormal.
According to a third aspect of the embodiments of the present disclosure, there is provided a vehicle including: the contactor comprises a contactor, a drive circuit of the contactor and a controller;
the drive circuit includes: the low-side drive is arranged between the contactor and the ground, the high-side drive is arranged between the contactor and a power supply, the controller is connected with the high-side drive, and the controller is connected with the low-side drive;
the controller is configured to perform the steps of the method of the first aspect of the embodiments of the present disclosure.
Through above-mentioned technical scheme, drive circuit in this disclosure includes: the drive circuit controls a first drive and a second drive to be powered on according to a preset first sequence when receiving a power-on command, determines whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is low-side drive or high-side drive, the second drive is drive different from the first drive in the low-side drive and the high-side drive, controls the first drive and the second drive to be powered off according to a preset second sequence when receiving a power-off command, determines whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off, and finally when determining that the drive circuit is abnormal, the drive circuit is disabled from powering up. The high-side drive and the low-side drive are controlled to be powered on or powered off according to the preset sequence, whether the drive circuit is normal or not is determined through the state of the contactor, the drive circuit can be detected under the condition that other elements are not added, the implementation is simple, the reliability is high, and the safety degree of vehicle control is improved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a method of detecting a driver circuit according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating a controller detection driver circuit according to an exemplary embodiment;
FIG. 3 is a flow chart illustrating another method of detecting a driver circuit in accordance with an exemplary embodiment;
FIG. 4 is a flow chart illustrating another method of detecting a driver circuit in accordance with an exemplary embodiment;
FIG. 5 is a flow chart illustrating another method of detecting a driver circuit in accordance with an exemplary embodiment;
FIG. 6 is a flow chart illustrating another method of detecting a driver circuit in accordance with an exemplary embodiment;
FIG. 7 is a block diagram illustrating an apparatus for detecting a driver circuit in accordance with an exemplary embodiment;
FIG. 8 is a block diagram illustrating another arrangement of detection driving circuits according to an exemplary embodiment;
FIG. 9 is a block diagram illustrating another arrangement of detection driving circuits according to an exemplary embodiment;
FIG. 10 is a block diagram of a vehicle shown in accordance with an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Before introducing the method, the apparatus and the vehicle for detecting a driving circuit provided by the present disclosure, an application scenario related to various embodiments of the present disclosure is first introduced. The application scenario may be a vehicle provided with a driving circuit of a contactor, and the vehicle may be an automobile, but is not limited to a pure electric automobile or a hybrid automobile.
Fig. 1 is a flowchart illustrating a method of detecting a driving circuit, which is applied to a driving circuit of a contactor, as shown in fig. 1, according to an exemplary embodiment, the driving circuit including: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the method comprising the steps of:
step 101, if a power-on instruction is received, controlling a first drive and a second drive to be powered on according to a preset first sequence, and determining whether a drive circuit is normal according to a first state of a contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is a low-side drive or a high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive.
For example, in order to ensure the safety of the vehicle, the driving circuit of the contactor may be detected when the vehicle is started. The driving circuit may include a Low Side Driver (LSD) disposed between the contactor and the ground (i.e., the ground), and a High Side Driver (HSD) disposed between the contactor and the power source. The power source may be, for example, a battery of the vehicle, and the voltage supplied by the power source to the high-side drive may be 5V or 10V, which is not limited in the present disclosure. The low-side drive and the high-side drive can be understood as 2 controllable switches arranged on a drive circuit, the low-side drive is used for controlling the on-off of the contactor and the ground, the high-side drive is used for controlling the on-off of the contactor and the power supply, namely, the contactor can be connected with the ground by controlling the low-side drive, and the contactor can be connected with the power supply by controlling the high-side drive. For example, a high signal ("1") may be sent to the low side drive and the high side drive to control the low side drive and the high side drive to power up, respectively, so that the contactor may be connected to ground after the low side drive is powered up and the contactor may be connected to a power source after the high side drive is powered up. Similarly, a low level signal ("0") may be sent to the low side drive and the high side drive to control the low side drive and the high side drive to power down, respectively, so that the contactor may be disconnected from ground after the low side drive is powered down and from the power supply after the high side drive is powered down. In another implementation manner, the power-on instruction may also be sent to the low-side driver and the high-side driver respectively to control the low-side driver and the high-side driver to power on, and the power-off instruction may also be sent to the low-side driver and the high-side driver respectively to control the low-side driver and the high-side driver to power off, which is not specifically limited in this disclosure.
When the driving circuit is detected, a control instruction can be sent to the first drive and the second drive of the driving circuit through a controller of the vehicle. The controller may be an MCU (micro controller Unit, chinese), an ECU (Electronic Control Unit, chinese), a BCM (Body Control Module, chinese), or the like. The control instructions may include a power-up instruction or a power-down instruction. The first drive may be a low-side drive or a high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive. That is, when the first drive is the low side drive, the second drive is the high side drive, and when the first drive is the high side drive, the second drive is the low side drive. A schematic diagram of the detection of the drive circuit by the controller may be as shown in fig. 2. The controller 120 may issue a control command to the driving circuit through a designated interface and then receive the control command by the driving circuit to control the state of the contactor 121. The designated Interface may be, for example, an I/O Interface, a Serial Interface, an SPI Interface (Serial Peripheral Interface, chinese), an I2C Interface (Inter-Integrated Circuit, chinese, Integrated Circuit bus), or the like. For example, the controller 120 may send a control instruction to the high side driver 122 through a first I/O interface connected to the high side driver 122, and may send a control instruction to the low side driver 123 through a second I/O interface connected to the low side driver 123. If the high-side driver 122 has a short-circuit fault at point 1, the power source and point 1 are in a continuous on state no matter whether the high-side driver 122 receives a power-on command, and when the high-side driver 122 receives a power-off command, the power source and point 1 cannot be disconnected. If the high-side driver 122 has an open-circuit fault at point 1, the power source and point 1 are continuously disconnected no matter whether the high-side driver 122 receives a power-down command, and when the high-side driver 122 receives a power-up command, the power source and point 1 cannot be connected. At this time, the high-side driver 122 cannot control the on/off of the power supply and the contactor 121. Similarly, if the low-side driver 123 has a short-circuit fault at the point 2, the point 2 and the ground are continuously connected regardless of whether the low-side driver 123 receives the power-on command, and the point 2 and the ground cannot be disconnected when the low-side driver 123 receives the power-off command. If the low side driver 123 has an open circuit fault at the point 2, the point 2 and the ground are continuously disconnected regardless of whether the low side driver 123 receives a power-down command, and when the low side driver 123 receives the power-up command, the point 2 and the ground cannot be connected. At this time, the low-side driver 123 cannot control the on/off of the contactor 121 with the ground.
Specifically, if the control instruction received by the driving circuit is a power-on instruction, the driving circuit may control the first driver and the second driver to be powered on according to a preset first sequence, and determine whether the driving circuit is normal according to a first state of the contactor after the first driver is powered on and a second state of the contactor after the second driver is powered on. The first state and the second state may include an open state and a closed state. For example, the driving circuit may control the first driving to be powered on first and then control the second driving to be powered on. After the first drive is powered on, the first state of the contactor may be obtained, and if the first state is a closed state, which indicates that both the first drive and the second drive are powered on, and the second drive is abnormal (for example, a short-circuit fault occurs), it may be determined that the drive circuit is abnormal. If the first state is a disconnected state, which indicates that the second drive is not abnormal, the second drive can be controlled to be powered on again, and the second state of the contactor after the second drive is powered on is obtained. If the first state is an open state, the second state is a closed state, which indicates that the contactor is turned on after the second drive is powered on, and the first drive and the second drive are not abnormal (for example, an open-circuit fault does not occur), it may be determined that the drive circuit is normal. If the first state is the off state and the second state is the off state, the problem that the contactor cannot be conducted when the controller sends a power-on command due to the fact that the first drive and/or the second drive are abnormal is solved, and the drive circuit can be determined to be abnormal. In another implementation manner, the second driver may be controlled to be powered on first, and then the first driver is controlled to be powered on, which is not limited in this disclosure.
And 102, if a power-off command is received, controlling the first drive and the second drive to power off according to a preset second sequence, and determining whether the drive circuit is normal according to the third state of the contactor after the first drive is powered off and the fourth state of the contactor after the second drive is powered off.
And 103, if the driving circuit is abnormal, the driving circuit is forbidden to be electrified.
For example, if the control command received by the driving circuit is a power-down command, the driving circuit may control the first driving and the second driving to power down according to a preset second sequence, and determine whether the driving circuit is normal according to a third state of the contactor after the first driving is powered down and a fourth state of the contactor after the second driving is powered down. For example, the driving circuit may control the first driving power-down first and then control the second driving power-down. After the first drive is powered off, a third state of the contactor can be acquired, and if the third state is a closed state, which indicates that the first drive and the second drive are still in a powered-on state, the first drive is abnormal (for example, a short-circuit fault occurs), which causes the controller to send a power-off instruction to cause the contactor not to be disconnected, then it can be determined that the drive circuit is abnormal. At this time, the second driving power-down can be continuously controlled, and the fourth state of the contactor after the second driving power-down is obtained. If the fourth state is a closed state, which indicates that the first drive and the second drive are still in a power-on state, and the second drive is also abnormal (for example, a short-circuit fault occurs), and the contactor is difficult to open, the controller may send a command for prohibiting power-on to the drive circuit to control the contactor to open. If the fourth state is the off state, it is described that the second driving is not abnormal, that is, the driving circuit is abnormal at this time, but the contactor can be turned off by the second driving. If the third state is an off state, which indicates that the first driving is not abnormal, the second driving can be controlled to be powered down again to complete the power-down operation of the driving circuit. In another implementation manner, the second driving power-down may be controlled first, and then the first driving power-down is controlled, which is not limited in this disclosure.
If the driving circuit is abnormal, the power-on instruction may be ignored when the power-on instruction is received again, or a first signal for indicating that the driving circuit is abnormal may be sent to the controller, so that the controller stops sending the power-on instruction after receiving the first signal, thereby prohibiting the driving circuit from being powered on, which is not limited in the present disclosure. Further, after the controller receives the first signal, an alarm message may be sent out, the alarm message may be in a form of, for example, a voice alarm, and may prompt the driver and passenger of the vehicle that the driving circuit is abnormal through the alarm message, or in a form of an image alarm, for example, an icon corresponding to the driving circuit on a console controlling the vehicle may flash to give an alarm, or in a form of a text alarm, for example, an alarm may be given by displaying the alarm message on a display screen of the vehicle.
In summary, the driving circuit in the present disclosure includes: the drive circuit controls a first drive and a second drive to be powered on according to a preset first sequence when receiving a power-on command, determines whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is low-side drive or high-side drive, the second drive is drive different from the first drive in the low-side drive and the high-side drive, controls the first drive and the second drive to be powered off according to a preset second sequence when receiving a power-off command, determines whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off, and finally when determining that the drive circuit is abnormal, the drive circuit is disabled from powering up. The high-side drive and the low-side drive are controlled to be powered on or powered off according to the preset sequence, whether the drive circuit is normal or not is determined through the state of the contactor, the drive circuit can be detected under the condition that other elements are not added, the implementation is simple, the reliability is high, and the safety degree of vehicle control is improved.
Fig. 3 is a flow chart illustrating another method of detecting a driving circuit according to an exemplary embodiment, as shown in fig. 3, step 101 includes:
step 1011, controlling the first driver to be powered on.
At step 1012, a first state of the contactor is obtained.
Step 1013, if the first state is the off state, controlling the second driver to power on.
Step 1014, obtain a second state of the contactor.
In step 1015, if the second state is the closed state, it is determined that the driving circuit is normal.
For example, if the driving circuit receives a power-on command, the driving circuit may first control the first driver to power on, and then obtain the first state of the contactor. If the first state is an off state, which indicates that the contactor is not turned on, the second driver may be controlled to be powered on again, and then the second state of the contactor is obtained. If the second state is a closed state at this time, it indicates that the contactor is already turned on and the contactor can be normally powered on, it may be determined that the driving circuit is normal.
Fig. 4 is a flow chart illustrating another method of detecting a driving circuit according to an exemplary embodiment, and as shown in fig. 4, step 101 further includes:
in step 1016, if the first state is a closed state, it is determined that the driving circuit is abnormal.
In step 1017, if the first state is the off state and the second state is the off state, it is determined that the driving circuit is abnormal.
For example, if the driving circuit receives a power-on command, the driving circuit may first control the first driver to power on, and then obtain the first state of the contactor. If the first state is a closed state, which indicates that the contactor is already turned on, it may be that a short-circuit fault occurs in the second driving, and it may be determined that the driving circuit is abnormal. If the first state is an off state, which indicates that the contactor is not conducted, the second drive can be controlled to be powered on again, and then the second state of the contactor is obtained. If the second state is an off state at this time, which indicates that an open-circuit fault has occurred in the first drive and/or the second drive, it may be determined that the drive circuit is abnormal.
Optionally, step 1016 includes:
and if the first state is the closed state, determining that the second driving is abnormal.
Step 1017 includes:
if the first state is an off state and the second state is an off state, the first drive and/or the second drive is determined to be abnormal.
In one implementation, after the first driving is powered on, if the first state is a closed state, which indicates that the contactor is turned on, it may be determined that the second driving has a short-circuit fault, and at this time, it may be determined that the second driving is abnormal. After the first drive is powered on, if the first state is an off state, which indicates that the contactor is not turned on, it may be determined that the second drive has no short-circuit fault, and at this time, the second drive may be continuously powered on. After the second drive is powered on, if the second state is a disconnected state, which indicates that the contactor is still not turned on after the first drive and the second drive are all powered on, it may be determined that the first drive and/or the second drive have an open-circuit fault, and at this time, it may be determined that the first drive and/or the second drive are abnormal.
Fig. 5 is a flow chart illustrating another method of detecting a driver circuit according to an exemplary embodiment, as shown in fig. 5, step 102 includes:
step 1021, controlling the first driving to power down.
At step 1022, a third state of the contactor is obtained.
And step 1023, if the third state is an off state, controlling the second drive to power off.
Step 1024, obtain a fourth state of the contactor.
And step 1025, if the fourth state is an off state, determining that the driving circuit is normal.
For example, if the driving circuit receives a power-off command, the driving circuit may first control the first driver to power off, and then obtain a third state of the first driver. If the third state is an open state, which indicates that the contactor is turned off, the second drive can be controlled to be powered down again, and then the fourth state of the contactor is obtained to complete the power-down operation of the drive circuit. After the driving circuit finishes the power-off operation, if the fourth state is the off state, the contactor can be powered off normally, and the driving circuit can be determined to be normal.
Fig. 6 is a flow chart illustrating another method of detecting a driving circuit according to an exemplary embodiment, as shown in fig. 6, step 102 further includes:
in step 1026, if the third state is a closed state, it is determined that the driving circuit is abnormal.
At step 1027, if the third state is closed and the fourth state is closed, it is determined that the driving circuit is abnormal.
For example, if the driving circuit receives a power-down command, the driving circuit may first control the first driving to power down, and then obtain the third state of the contactor. If the third state is a closed state, which indicates that the contactor is not opened, it indicates that the first drive has a short-circuit fault, and it can be determined that the drive circuit is abnormal. At this time, the second driving power-down may be continuously controlled according to the power-down command to open the contactor. After the second drive is controlled to be powered off, if the fourth state is still a closed state, which indicates that the contactor is not opened, the second drive is indicated to have a short-circuit fault, and the drive circuit can be determined to be abnormal. If the fourth state is an open state, which indicates that the contactor is already open, it indicates that the second drive has not failed due to a short-circuit, but the drive circuit is still an abnormal circuit at this time because the first drive has failed due to a short-circuit.
Optionally, step 1026 includes:
if the third state is the closed state, it is determined that the first drive is abnormal.
Step 1027 includes:
and if the third state is a closed state and the fourth state is a closed state, determining that the first drive and the second drive are abnormal.
In one implementation, after the first driving is powered off, if the third state is a closed state, which indicates that the contactor is not opened, it indicates that the first driving has a short-circuit fault, and at this time, it may be determined that the first driving is abnormal. After the first drive is powered down, if the third state is a closed state, the second drive can be powered down continuously so as to control the contactor to be disconnected through the second drive. After the second drive is controlled to be powered off, if the fourth state is also a closed state, and the contactor is not opened through the second drive, the second drive is indicated to have a short-circuit fault, and at this moment, the first drive and the second drive can be determined to be abnormal.
In summary, the driving circuit in the present disclosure includes: the drive circuit controls a first drive and a second drive to be powered on according to a preset first sequence when receiving a power-on command, determines whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is low-side drive or high-side drive, the second drive is drive different from the first drive in the low-side drive and the high-side drive, controls the first drive and the second drive to be powered off according to a preset second sequence when receiving a power-off command, determines whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off, and finally when determining that the drive circuit is abnormal, the drive circuit is disabled from powering up. The high-side drive and the low-side drive are controlled to be powered on or powered off according to the preset sequence, whether the drive circuit is normal or not is determined through the state of the contactor, the drive circuit can be detected under the condition that other elements are not added, the implementation is simple, the reliability is high, and the safety degree of vehicle control is improved.
Fig. 7 is a block diagram illustrating an apparatus for detecting a driving circuit according to an exemplary embodiment, and as shown in fig. 7, the apparatus 200 is applied to a driving circuit of a contactor, the driving circuit including: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the apparatus 200 comprising:
and the power-on control module 201 is configured to control the first drive and the second drive to be powered on according to a preset first sequence if a power-on instruction is received, and determine whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, where the first drive is a low-side drive or a high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive.
And the power-off control module 202 is configured to control the first driving and the second driving to power off according to a preset second sequence if a power-off instruction is received, and determine whether the driving circuit is normal according to a third state of the contactor after the first driving is powered off and a fourth state of the contactor after the second driving is powered off.
And the prohibiting module 203 is used for prohibiting the driving circuit from being powered on if the driving circuit is abnormal.
Fig. 8 is a block diagram illustrating another apparatus for detecting a driving circuit according to an exemplary embodiment, and as shown in fig. 8, a power-up control module 201 includes:
the power-on control sub-module 2011 is configured to control the first driver to be powered on.
The power-up obtaining sub-module 2012 is used for obtaining a first state of the contactor.
The power-on control sub-module 2011 is further configured to control the second driver to power on if the first state is the off state.
The power-up obtaining sub-module 2012 is further configured to obtain a second state of the contactor.
And the power-on determining submodule 2013 is used for determining that the driving circuit is normal if the second state is the closed state.
Optionally, the power-up determination submodule 2013 is further configured to:
and if the first state is the closed state, determining that the driving circuit is abnormal.
And if the first state is the disconnection state and the second state is the disconnection state, determining that the driving circuit is abnormal.
Optionally, the power-up determining submodule 2013 is configured to:
and if the first state is the closed state, determining that the second driving is abnormal.
If the first state is an off state and the second state is an off state, the first drive and/or the second drive is determined to be abnormal.
Fig. 9 is a block diagram illustrating another apparatus for detecting a driving circuit according to an exemplary embodiment, and as shown in fig. 9, the power-down control module 202 includes:
and the power-off control sub-module 2021 is used for controlling the power-off of the first drive.
And a power-down acquisition sub-module 2022 for acquiring a third state of the contactor.
The power-off control sub-module 2021 is further configured to control the second driver to power off if the third state is an off state.
And the power-down acquisition sub-module 2022 is further used for acquiring a fourth state of the contactor.
And the power-down determination sub-module 2023 is configured to determine that the driving circuit is normal if the fourth state is the off state.
Optionally, the lower electricity determination sub-module 2023 is further configured to:
and if the third state is the closed state, determining that the driving circuit is abnormal.
And if the third state is a closed state and the fourth state is a closed state, determining that the driving circuit is abnormal.
Optionally, the lower electrical determination sub-module 2023 is configured to:
and if the third state is the closed state, determining that the first driving is abnormal.
And if the third state is a closed state and the fourth state is a closed state, determining that the first drive and the second drive are abnormal.
With regard to the apparatus in the above-described embodiment, the specific manner in which each part performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.
In summary, the driving circuit in the present disclosure includes: the drive circuit controls a first drive and a second drive to be powered on according to a preset first sequence when receiving a power-on command, determines whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is low-side drive or high-side drive, the second drive is drive different from the first drive in the low-side drive and the high-side drive, controls the first drive and the second drive to be powered off according to a preset second sequence when receiving a power-off command, determines whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off, and finally when determining that the drive circuit is abnormal, the drive circuit is disabled from powering up. The high-side drive and the low-side drive are controlled to be powered on or powered off according to the preset sequence, whether the drive circuit is normal or not is determined through the state of the contactor, the drive circuit can be detected under the condition that other elements are not added, the implementation is simple, the reliability is high, and the safety degree of vehicle control is improved.
Fig. 10 is a block diagram of a vehicle according to an exemplary embodiment, as shown in fig. 10, the vehicle 300 including: a contactor 301, a drive circuit 302 for the contactor 301, and a controller 303.
The drive circuit 302 includes: a low side drive 304 disposed between the contactor 301 and ground, and a high side drive 305 disposed between the contactor 301 and a power source 306, the controller 303 connected to the high side drive 305, the controller 303 connected to the low side drive 304.
A controller 303 for performing the steps of the method of detecting the driving circuit described above.
With regard to the vehicle in the above-described embodiment, the specific implementation of the controller has been described in detail in the embodiment related to the method, and will not be elaborated here.
In summary, the driving circuit in the present disclosure includes: the drive circuit controls a first drive and a second drive to be powered on according to a preset first sequence when receiving a power-on command, determines whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is low-side drive or high-side drive, the second drive is drive different from the first drive in the low-side drive and the high-side drive, controls the first drive and the second drive to be powered off according to a preset second sequence when receiving a power-off command, determines whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off, and finally when determining that the drive circuit is abnormal, the drive circuit is disabled from powering up. The high-side drive and the low-side drive are controlled to be powered on or powered off according to the preset sequence, whether the drive circuit is normal or not is determined through the state of the contactor, the drive circuit can be detected under the condition that other elements are not added, the implementation is simple, the reliability is high, and the safety degree of vehicle control is improved.
Although the preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited to the specific details of the embodiments, and other embodiments of the present disclosure can be easily conceived by those skilled in the art within the technical spirit of the present disclosure after considering the description and practicing the present disclosure, and all fall within the protection scope of the present disclosure.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable way without contradiction, and in order to avoid unnecessary repetition, the disclosure does not need to be separately described in various possible combinations, and should be considered as the disclosure of the disclosure as long as the concepts of the disclosure are not violated.

Claims (7)

1. A method of testing a driver circuit applied to a contactor, the driver circuit comprising: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the method comprising:
if a power-on instruction is received, controlling a first drive and a second drive to be powered on according to a preset first sequence, and determining whether the drive circuit is normal or not according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is the low-side drive or the high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive;
if a power-off instruction is received, controlling the first drive and the second drive to power off according to a preset second sequence, and determining whether the drive circuit is normal according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off;
if the driving circuit is abnormal, the driving circuit is forbidden to be electrified;
the controlling the first drive and the second drive to be powered on according to a preset first sequence, and determining whether the drive circuit is normal according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, includes:
controlling the first drive to be powered on;
acquiring the first state of the contactor;
if the first state is a disconnection state, controlling the second drive to be electrified;
acquiring the second state of the contactor;
if the second state is a closed state, determining that the driving circuit is normal;
the controlling the first driving and the second driving to be powered off according to a preset second sequence, and determining whether the driving circuit is normal according to a third state of the contactor after the first driving is powered off and a fourth state of the contactor after the second driving is powered off, including:
controlling the first drive to be powered down;
acquiring the third state of the contactor;
if the third state is an off state, controlling the second drive to power off;
acquiring the fourth state of the contactor;
and if the fourth state is the disconnection state, determining that the driving circuit is normal.
2. The method of claim 1, wherein the controlling the first driver and the second driver to be powered on according to a preset first sequence, and determining whether the driving circuit is normal according to a first state of the contactor after the first driver is powered on and a second state of the contactor after the second driver is powered on, further comprises:
if the first state is a closed state, determining that the driving circuit is abnormal;
and if the first state is an off state and the second state is an off state, determining that the driving circuit is abnormal.
3. The method of claim 2, wherein determining that the driving circuit is abnormal if the first state is a closed state comprises:
if the first state is a closed state, determining that the second drive is abnormal;
if the first state is an off state and the second state is an off state, determining that the driving circuit is abnormal includes:
and if the first state is an off state and the second state is an off state, determining that the first drive and/or the second drive are abnormal.
4. The method of claim 1, wherein the controlling the first driving and the second driving to power down in a preset second sequence and determining whether the driving circuit is normal according to a third state of the contactor after the first driving to power down and a fourth state of the contactor after the second driving to power down further comprises:
if the third state is a closed state, determining that the driving circuit is abnormal;
and if the third state is a closed state and the fourth state is a closed state, determining that the driving circuit is abnormal.
5. The method of claim 4, wherein determining that the driving circuit is abnormal if the third state is a closed state comprises:
if the third state is a closed state, determining that the first drive is abnormal;
if the third state is a closed state and the fourth state is a closed state, determining that the driving circuit is abnormal includes:
and if the third state is a closed state and the fourth state is a closed state, determining that the first drive and the second drive are abnormal.
6. An apparatus for testing a driving circuit, wherein the driving circuit is applied to a contactor, the driving circuit comprises: a low side drive disposed between the contactor and ground, and a high side drive disposed between the contactor and a power source, the apparatus comprising:
the power-on control module is used for controlling a first drive and a second drive to be powered on according to a preset first sequence if a power-on instruction is received, and determining whether the drive circuit is normal or not according to a first state of the contactor after the first drive is powered on and a second state of the contactor after the second drive is powered on, wherein the first drive is the low-side drive or the high-side drive, and the second drive is a drive different from the first drive in the low-side drive and the high-side drive;
the power-off control module is used for controlling the first drive and the second drive to power off according to a preset second sequence if a power-off instruction is received, and determining whether the drive circuit is normal or not according to a third state of the contactor after the first drive is powered off and a fourth state of the contactor after the second drive is powered off;
the forbidding module is used for forbidding the driving circuit to be electrified if the driving circuit is abnormal;
the power-up control module comprises:
the power-on control submodule is used for controlling the first drive to be powered on;
the power-on acquisition sub-module is used for acquiring the first state of the contactor;
the power-on control submodule is further used for controlling the second driver to be powered on if the first state is a disconnected state;
the power-on obtaining sub-module is further configured to obtain the second state of the contactor;
the power-on determining sub-module is used for determining that the driving circuit is normal if the second state is a closed state;
the power down control module includes:
the power-off control sub-module is used for controlling the first drive power-off;
a power-off acquisition sub-module for acquiring the third state of the contactor;
the power-off control sub-module is further used for controlling the second drive to power off if the third state is a disconnected state;
the power-off acquisition sub-module is further used for acquiring the fourth state of the contactor;
and the power-off determining submodule is used for determining that the driving circuit is normal if the fourth state is a disconnected state.
7. A vehicle, characterized in that the vehicle comprises: the contactor comprises a contactor, a drive circuit of the contactor and a controller;
the drive circuit includes: the low-side drive is arranged between the contactor and the ground, the high-side drive is arranged between the contactor and a power supply, the controller is connected with the high-side drive, and the controller is connected with the low-side drive;
the controller for performing the steps of the method of any one of claims 1-5.
CN202010694104.2A 2020-07-17 2020-07-17 Method and device for detecting driving circuit and vehicle Active CN111900966B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111123151A (en) * 2019-12-26 2020-05-08 东软睿驰汽车技术（沈阳）有限公司 Fault detection circuit and fault detection method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111123151A (en) * 2019-12-26 2020-05-08 东软睿驰汽车技术（沈阳）有限公司 Fault detection circuit and fault detection method

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