CN110341483B

CN110341483B - Detection system and detection method for motor controller of electric vehicle

Info

Publication number: CN110341483B
Application number: CN201910673383.1A
Authority: CN
Inventors: 杨鹏; 胡孝辉; 黄树毅; 艾治国
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2021-06-04
Anticipated expiration: 2039-07-24
Also published as: CN110341483A

Abstract

The embodiment of the application provides a detection system and a detection method for a motor controller of an electric automobile, and the detection system can comprise a power battery, a distribution box, a driving motor controller, a processing module and an interlocking loop, wherein the distribution box is provided with a contactor, two ends of the contactor are respectively connected with the power battery and the driving motor controller, the processing module is connected with the contactor, and the interlocking loop is communicated with the processing module and the driving motor controller; the processing module detects the opening and closing state of the contactor when the driving motor controller recovers energy; when the contactors are in a closed state, the interlocking loop is controlled to be conducted; when the contactor is in an off state, the interlocking loop is controlled to be switched off; when the interlocking loop is conducted, the driving motor controller is controlled to charge the power battery; and controlling the drive motor controller to stop charging the power battery when the power battery is disconnected. The whole device can prolong the service life of the automobile power system and can also reduce the damage risk of the power system caused by abnormal disconnection of devices in the power recovery process.

Description

Detection system and detection method for motor controller of electric vehicle

Technical Field

The application relates to the field of automobiles, in particular to a detection system of an electric automobile motor controller and a detection method of the electric automobile motor controller.

Background

With the development of scientific technology, automobiles have become an indispensable vehicle in life.

In order to meet the green environmental protection standard and sustainable development, automobiles are gradually changed from fuel automobiles to electric automobiles, and the core of the electric automobiles is a power battery which provides electric power for the automobiles to run.

In order to improve the endurance capacity of the electric automobile, a driving motor controller (electric control for short) is arranged in the electric automobile, the driving motor controller is respectively connected with a power battery and a driving motor, when the electric automobile runs, the driving motor controller converts direct current electric energy of the power battery into alternating current electric energy required by the driving motor, when the electric automobile brakes or slides, the electromagnetic induction of the driving motor can generate alternating current electric energy, and the driving motor controller can convert the alternating current electric energy into the direct current electric energy of the power battery, so that the power battery is supplemented, the electric energy is recycled, and the whole automobile has longer endurance mileage.

When the driving motor controller converts alternating current electric energy into direct current electric energy to charge the power battery, if the contactor is abnormally disconnected (such as power failure, bouncing off, misoperation and the like of the contactor), the driving motor controller cannot be informed to stop charging in time, and the driving motor controller cannot enter into a protection action in time, so that each device in the driving motor controller works in a differential pressure mode, each device is damaged, a vehicle loses power, and the driving safety of a driver is seriously influenced.

Disclosure of Invention

In view of the above problems, it is proposed to provide a detection system of a motor controller of an electric vehicle and a detection method of a motor controller of an electric vehicle that overcome or at least partially solve the above problems.

The application provides a detecting system of electric automobile motor controller, including power battery, block terminal, driving motor controller, processing module to and interlocking return circuit, the block terminal is equipped with the contactor, the both ends of contactor are connected respectively power battery with the driving motor controller, processing module with the contactor is connected, interlocking return circuit intercommunication processing module with the driving motor controller.

The processing module is used for detecting the opening and closing state of the contactor when the driving motor controller recovers energy; when the contactor is in a closed state, controlling the interlocking loop to be conducted; when the contactor is in an open state, the interlocking loop is controlled to be opened;

the interlocking loop is used for controlling the driving motor controller to charge the power battery when the interlocking loop is conducted; and when the interlocking loop is disconnected, controlling the driving motor controller to stop charging the power battery.

Optionally, the processing module includes: the system comprises a switching-on/switching-off processing unit, a first testing module and a second testing module, wherein the first testing module and the second testing module are respectively connected with the switching-on/switching-off processing unit;

the first testing module is used for testing a first opening and closing state of the first contactor and sending the first opening and closing state to the on-off processing unit;

the second testing module is used for testing a second opening and closing state of the second contactor and sending the second opening and closing state to the on-off processing unit;

the switching-off processing unit is used for receiving the first switching-on state and the second switching-on state, generating a closing signal when the first switching-on state and the second switching-on state are both in a closing state, and controlling the interlocking loop to be switched on according to the closing signal; and when the first opening and closing state or the opening and closing state is a disconnection state, generating a disconnection signal, and controlling the interlock loop to be disconnected according to the disconnection signal.

Optionally, the first test module comprises:

the first voltage testing submodule is used for testing whether voltages at two ends of the first contactor are the same or not;

the first closing state submodule is used for generating a first closing state when voltages at two ends of the first contactor are tested to be the same, and sending the first closing state to the on-off processing unit;

and the first disconnection state submodule is used for generating a first disconnection state when the voltages at two ends of the first contactor are tested to be different, and sending the first disconnection state to the disconnection processing unit.

Optionally, the second test module comprises:

the second voltage testing submodule is used for testing whether the voltages at two ends of the second contactor are the same or not;

the second closing state submodule is used for generating a second closing state when the voltages of two ends of the second contactor are tested to be the same, and sending the second closing state to the on-off processing unit;

and the second disconnection state submodule is used for generating a second disconnection state when the voltages at two ends of the second contactor are tested to be different, and sending the second disconnection state to the disconnection processing unit.

Optionally, the interlock loop includes a control switch and a detection circuit, the control switch is connected to the detection circuit, and the control switch is connected to the disconnection processing unit;

the control switch is used for receiving the closing signal and closing the switch according to the closing signal, or receiving the opening signal and opening the switch according to the opening signal;

the detection circuit is used for conducting when the control switch is closed, and controlling the driving motor controller to charge the power battery; and when the control switch is disconnected, and the driving motor controller is controlled to stop charging the power battery.

Optionally, the detection circuit comprises a light emitter, a pull-up circuit; the pull-up circuit comprises a light receiver and a pull-up resistor, the pull-up resistor is connected between an internal power supply VCC of the drive motor controller and a grounding terminal, and the light receiver is connected between the VCC and the pull-up resistor; the illuminator is connected into the interlocking loop, and emits light when the interlocking loop is connected and does not emit light when the interlocking loop is disconnected;

the driving motor controller comprises a control unit and a charging module, and the control unit is connected with an output end between the light receiver and the pull-up resistor in the pull-up circuit;

the light receiver is used for being switched on when light is detected so that the VCC outputs high level to the control unit, and being switched off when light is not detected so that the VCC outputs low level to the control unit;

the control unit is used for receiving a high level or a low level;

the charging module is used for charging the power battery if the control unit receives a high level; and the control unit is used for stopping charging the power battery if the control unit receives a low level.

The application also provides a detection method of the electric vehicle motor controller, wherein the electric vehicle motor controller is connected with a detection system, and the detection system comprises: the power battery, the distribution box, the driving motor controller, the processing module and the interlocking loop are arranged, the distribution box is provided with a contactor, two ends of the contactor are respectively connected with the power battery and the driving motor controller, the processing module is connected with the contactor, and the interlocking loop is communicated with the processing module and the driving motor controller;

the method comprises the following steps:

when the driving motor controller recovers energy, the processing module detects the opening and closing state of the contactor; when the contactor is in a closed state, the processing module controls the interlocking loop to be conducted; when the contactor is in an open state, the processing module controls the interlocking loop to be opened;

when the interlocking loop is conducted, the interlocking loop controls the driving motor controller to charge the power battery; when the interlocking loop is disconnected, the interlocking loop controls the driving motor controller to stop charging the power battery.

when the driving motor controller recovers energy, the processing module detects the opening and closing state of the contactor; when the contactor is in a closed state, the processing module controls the interlocking loop to be conducted; when the contactor is in an open state, the process module controls the interlock loop to be opened, and the process module comprises the following steps:

when the driving motor controller recovers energy, the first testing module tests a first opening and closing state of the first contactor and sends the first opening and closing state to the on-off processing unit;

the second testing module tests a second opening and closing state of the second contactor and sends the second opening and closing state to the on-off processing unit;

the switching-off processing unit receives the first switching-on state and the second switching-on state, generates a closing signal when the first switching-on state and the second switching-on state are both in a closing state, and controls the interlocking loop to be switched on according to the closing signal; and when the first opening and closing state or the second opening and closing state is a disconnection state, generating a disconnection signal, and controlling the interlock loop to be disconnected according to the disconnection signal.

Optionally, the testing the first open/close state of the first contactor by the first testing module, and sending the first open/close state to the disconnection processing unit includes:

the first testing module tests whether voltages at two ends of the first contactor are the same or not;

when voltages at two ends of the first contactor are tested to be the same, the first testing module generates a first closing state and sends the first closing state to the on-off processing unit;

when the voltages at the two ends of the first contactor are tested to be different, the first test module generates a first disconnection state and sends the first disconnection state to the disconnection processing unit.

Optionally, the testing the second open/close state of the second contactor by the second testing module, and sending the second open/close state to the disconnection processing unit includes:

the second testing module tests whether the voltages at two ends of the second contactor are the same;

when the voltages at two ends of the second contactor are tested to be the same, the second testing module generates a second closing state and sends the second closing state to the on-off processing unit;

and when the voltages at the two ends of the second contactor are tested to be different, the second test module generates a second off state and sends the second off state to the on-off processing unit.

when the interlocking loop is conducted, the interlocking loop controls the driving motor controller to charge the power battery; when the interlock loop is disconnected, the interlock loop controls the driving motor controller to stop charging the power battery, and the method comprises the following steps:

the control switch receives the closing signal and closes the switch according to the closing signal, or receives the opening signal and opens the switch according to the opening signal;

if the control switch is closed, the detection circuit is conducted, and the detection circuit controls the driving motor controller to charge the power battery; if the control switch is disconnected, the detection circuit is disconnected, and the detection circuit controls the driving motor controller to stop charging the power battery.

the detection circuit is conducted when the control switch is closed, and controls the driving motor controller to charge the power battery; the detection circuit is disconnected when the control switch is disconnected with the switch, and controls the driving motor controller to stop charging the power battery, and the detection circuit comprises:

the light receiver is turned on when light is detected so that the VCC outputs a high level to the control unit, and is turned off when light is not detected so that the VCC outputs a low level to the control unit;

the control unit receives a high level or a low level;

if the control unit receives a high level, the charging module charges the power battery; and if the control unit receives a low level, the charging module stops charging the power battery.

The application also provides a detection system of the motor controller of the electric automobile, which comprises a power battery, a distribution box, a driving motor controller, a processing module and an interlocking loop, wherein the distribution box is provided with two contactors, namely a first contactor and a second contactor respectively, the two ends of the first contactor are connected with the anode of the power battery and the driving motor controller respectively, the two ends of the second contactor are connected with the cathode of the power battery and the driving motor controller respectively, the processing module is connected with the first contactor and the second contactor respectively, the interlocking loop is provided with a control switch, the processing module is connected with the control switch, and the interlocking loop is communicated with the processing module and the driving motor controller;

the processing module is used for respectively detecting the opening and closing states of the first contactor and the second contactor when the driving motor controller recovers energy; when the first contactor and the second contactor are both in a closed state, the processing module controls the control switch to be closed and controls the interlocking loop to be conducted; when any one of the first contactor or the second contactor is in a disconnection state, the processing module controls the control switch to be disconnected and controls the interlocking loop to be disconnected;

the interlocking loop is used for controlling the driving motor controller to charge the power battery when the control switch is closed; and when the control switch is disconnected, the interlocking loop is disconnected, and the driving motor controller is controlled to stop charging the power battery.

The application also provides a vehicle, and the vehicle carries the detection system of the motor controller of the electric automobile.

The present application further provides a vehicle, comprising:

one or more processors; and

one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the vehicle to perform one or more methods as described above.

The present application also proposes one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause the processors to perform one or more of the methods described above.

The embodiment of the application has the following advantages:

by applying the embodiment of the application, when an automobile runs, the power battery can convert electric energy into electric energy required by the driving motor through the driving motor controller, and the driving motor controller can also convert the electric energy of the driving motor into the charging electric energy of the power battery for energy recovery. When energy recovery is carried out, a processing module detects the closing state of a first contactor and a second contactor, and controls the interlocking loop to be conducted when the first contactor and the second contactor are both in the closing state; when the first contactor or the second contactor is in an open state, controlling the interlocking loop to be opened; controlling the driving motor controller to charge the power battery when the power battery is switched on; and controlling the driving motor controller to stop charging the power battery when the power battery is disconnected. The whole detection system is simple in structure, high in detection speed and high in efficiency. The driving motor controller can get into the protection action rapidly when the contactor disconnection when the electric energy is retrieved, thereby avoids driving motor controller's voltage to surpass withstand voltage value and damage the device, also can avoid leading to whole car to lose power because of the part damages, influences driver and vehicle safety of traveling, improves car factor of safety, also reduces the damage risk that brings because of the unusual disconnection of connecting device when power is retrieved.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic structural diagram of an embodiment of a detection system of a motor controller of an electric vehicle according to the present application;

FIG. 2 is a schematic diagram illustrating energy recovery of a controller of a driving motor of an electric vehicle according to the present application;

FIG. 3 is a schematic block diagram of one embodiment of a processing module of the present application;

FIG. 4 is a schematic structural diagram of one embodiment of a first test module of the present application;

FIG. 5 is a schematic block diagram of a second test module according to an embodiment of the present application;

FIG. 6 is a circuit schematic of one embodiment of a detection circuit of the present application;

FIG. 7 is a schematic structural diagram illustrating an embodiment of a detection system of a motor controller of an electric vehicle according to the present application;

FIG. 8 is a flowchart illustrating steps of one embodiment of a method for detecting a motor controller of an electric vehicle according to the present application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, a step flowchart of one embodiment of the detection system of the electric vehicle motor controller according to the present application is shown, in the embodiment of the present application, the detection system of the electric vehicle motor controller may include a power battery 101, a distribution box 102, a driving motor controller 103, a processing module 104, and an interlock loop 105, the distribution box 102 is provided with a contactor, two ends of the contactor are respectively connected to the power battery 101 and the driving motor controller 103, the processing module 104 and the contactor are connected, the interlock loop 105 is communicated to the processing module 104 and the driving motor controller 103.

And a power battery 101 for supplying electric energy or storing electric energy.

In the electric vehicle, the power battery is the heart of the electric vehicle, and the power battery provides electric energy for the electric vehicle to supply the electric vehicle with activities of starting, advancing, reversing and the like, and in alternative embodiments, the power battery may use a valve port sealed lead-acid battery, an open tubular lead-acid battery, a lithium iron phosphate battery, a lead-acid battery, a nickel cadmium battery, a nickel hydrogen battery, an iron nickel battery, a sodium nickel chloride battery, a silver zinc battery, a sodium sulfur battery, a lithium battery, an air battery (a zinc air battery, an aluminum air battery), a fuel battery and the like.

The power battery has the following characteristics: the high-power high-energy-density solar battery has the advantages of high energy, high power, high energy density, wide working temperature range, capability of being recycled under a high-rate partial charge state (HRPSOC), capability of normally working at minus 30-65 ℃, long service life, capability of being used for 5-10 years, safety and reliability.

In practice, if the power battery is used to meet the requirements of the power system of the electric automobile and the hybrid electric automobile, the rapid development of the automobile can be met, and the automobile is promoted to be driven from chemical energy sources to green energy sources. The use of the power battery also improves the energy efficiency and reduces the emission, and can also exert the additional value of the power battery, so that the power battery is more intelligent, reliable and comfortable and reduces the cost.

A distribution box 102 for connecting the power battery 101 and the driving motor controller 103;

by applying the embodiment of the application, the power battery provides high voltage electricity, so that a contactor can be arranged between the power battery and the driving motor controller in order to avoid the fault of any one of the power battery or the driving motor controller or further cause the cascading failure. In a preferred embodiment of the present application, the distribution box may be provided with a first contactor and a second contactor, wherein two ends of the first contactor are respectively connected to the positive pole of the power battery and the driving motor controller, and two ends of the second contactor are respectively connected to the negative pole of the power battery and the driving motor controller.

In a specific implementation, one or more contactors may be provided, for example, one contactor is provided in a positive connection loop between the driving motor controller and the power battery, or one contactor is provided in a negative connection loop between the driving motor controller and the power battery, and once a fault occurs, the contactor may ensure that the power battery or the driving motor controller may be immediately disconnected, thereby improving safety performance. In practice, the contactor can be fixedly assembled on the distribution box, so that the connection between the driving motor controller and the power battery is more reliable. Of course, the skilled person can also set the contactor arbitrarily according to the actual situation, for example, a plurality of contactors are set on one circuit, which is not limited in this application.

In practice, the contactor may preferably be a dc contactor, which has the characteristics of long service life, high reliability, multiple functions, environmental protection and communication, and the dc contactor may be adapted to operate at a high frequency, so that the operating frequency may reach 1200 times per hour when the power battery and the driving motor controller are controlled to be turned off.

And the driving motor controller 103 is used for converting the electric energy of the power battery into the electric energy required by the driving motor, or converting the electric energy of the driving motor into the charging electric energy of the power battery.

The driving motor controller can convert the electric energy stored by the power battery into the electric energy required by the driving motor according to instructions of gears, an accelerator, a brake and the like of the electric automobile, so that the driving states of the electric automobile such as starting operation, advancing and retreating speed, climbing force and the like are controlled, or the electric automobile is assisted to brake and part of braking energy is stored in the power battery to charge the power battery, and the cruising ability of the power battery is improved.

In specific implementation, the driving motor controller can convert direct current of the power battery into alternating current, and transmit the alternating current to the driving motor for the driving motor to work, and also can convert alternating current of the driving motor into direct current, and transmit the direct current to the power battery to charge the power battery. The driving motor controller can also control the magnitude and direction of the output current.

When the driving motor controller converts the electric energy of the power battery into the electric energy for driving the motor to work, the driving motor controller drives the electric power, and when the driving motor controller converts the electric energy of the driving motor into the electric energy for charging the power battery, the driving motor controller recovers the energy.

The processing module 104 is configured to detect an opening and closing state of the contactor when the driving motor controller recovers energy; when the contactor is in a closed state, controlling the interlocking loop to be conducted; and when the contactor is in an open state, the interlocking circuit is controlled to be opened.

In practice, when the driving motor controller converts the dc power of the power battery into ac power, if the contactor is abnormally disconnected, the driving motor controller does not receive any power, so that the driving motor controller and the driving motor can immediately enter a protection action to protect the driving motor controller and the driving motor.

Referring to the schematic diagram of energy recovery of the driving motor controller of the electric vehicle shown in fig. 2, when the vehicle brakes or slides, the driving motor generates alternating current electric energy through electromagnetic induction, and the driving motor controller can convert the alternating current electric energy into direct current of the power battery to supplement the power battery for recycling, so that the whole vehicle has longer endurance mileage. When the driving motor controller converts the ac power into the dc power to charge the power battery, if the contactor is abnormally disconnected, the driving motor controller may output the dc power to a bus capacitor C disposed in the driving motor controller, which may be specifically referred to fig. 2. And only when the bus capacitor C is fully charged, the bus capacitor C can send an overvoltage alarm to the drive motor controller to trigger the drive motor controller to enter into a protection action. The drive motor controller cannot enter the protection action at the moment after the contactor is abnormally disconnected, so that the time for the drive motor controller to enter the protection action is prolonged. The processing module can immediately detect the opening and closing state of the contactor when the driving motor controller recovers energy, the time for the driving motor controller to enter the protection action is shortened, the efficiency for the driving motor controller to enter the protection action is improved, the fault risk of parts is reduced, and the driving safety of a driver can be improved.

In practice, the processing module may also detect the open/close state of the contactor at the beginning of the starting of the automobile, which is not limited in the present application.

If one contactor is actually provided, the processing module may detect an open or closed state of one contactor, and if a plurality of contactors are actually provided, the processing module may detect open or closed devices of a plurality of contactors. Specifically, if the contactor is detected to be closed, the processing module may control the interlock circuit to be turned on according to the closed state of the contactor, and if the contactor is detected to be turned off, the processing module may control the interlock circuit to be turned off according to the open state of the contactor. The drive motor controller can be controlled to work or stop working through the disconnection or the connection of the interlocking loop.

In a preferred embodiment of the present application, two contactors may be provided, namely, a first contactor and a second contactor, wherein two ends of the first contactor are respectively connected to the positive electrode of the power battery and the driving motor controller, and two ends of the second contactor are respectively connected to the negative electrode of the power battery and the driving motor controller.

In this case, the processing module may directly connect the first contactor and the second contactor, and detect the open/close state of the first contactor and the open/close state of the second contactor; or, processing module also can link to each other with the block terminal, carries on the state of first contactor and second contactor through detecting the block terminal, obtains the state of opening and shutting of first contactor and second contactor. In concrete implementation, the processing module can also be directly connected with a connector of the distribution box, and the opening and closing state of the first contactor and the opening and closing state of the second contactor are obtained by detecting the current state of the connector.

As an example of a specific application, the processing module may be connected to the auxiliary contact of the first contactor and the auxiliary contact of the second contactor, and the open-close state of the first contactor and the open-close state of the second contactor may be obtained by detecting states of the auxiliary contact of the first contactor and the auxiliary contact of the second contactor, respectively.

The processing module can quickly detect the opening and closing state of the first contactor and the opening and closing state of the second contactor, so that the detection operation is simplified, the detection efficiency is improved, and the time for driving the motor controller to enter the protection action can be shortened.

Referring to a schematic structural diagram of one embodiment of a processing module shown in fig. 3, in this embodiment, the processing module 104 may include:

the first test module 1041, the second test module 1042, and the disconnection processing unit 1043 connected to the first test module 1041 and the second test module 1042, respectively, the disconnection processing unit 1043 may be connected to the interlock loop 105, the first test module may be connected to the first contactor, and the second test module may be connected to the second contactor;

in a specific implementation, the disconnection processing unit 1043 may be connected to the first testing module 1041 and the second testing module 1042 respectively by using an interlocking wire, so as to achieve an interlocking effect between the contactor and the interlocking loop.

The first testing module 1041 is configured to test a first open/close state of the first contactor, and send the first open/close state to the disconnection processing unit;

specifically, the first testing module can test a first open-close state of the first contactor, send the first open-close state to the open-close processing unit, and the open-close processing unit controls the interlock loop to be switched on or switched off according to the first open-close state.

The first testing module in the embodiment of the application can quickly test the current state of the first contactor, so that the detection efficiency is further improved; in practice, the first testing module may test the first contactor in real time, or may test the first contactor at a preset time interval, and a person skilled in the art may set the first testing module arbitrarily according to an actual situation, which is not limited in this application.

Referring to fig. 4, which shows a schematic structural diagram of an embodiment of the first test module of the present application, in a preferred example of the present embodiment, the first test module 1041 may include the following sub-modules:

the first voltage testing submodule 10411 is configured to test whether voltages at two ends of the first contactor are the same;

in this embodiment, the first voltage testing submodule may directly test the voltage at two ends of the first contactor, or may directly test the current at two ends of the first contactor. The skilled person can set the method arbitrarily according to the actual situation, and the application is not limited to this.

The first closing state submodule 10412 is configured to generate a first closing state when voltages at two ends of the first contactor are tested to be the same, and send the first closing state to the disconnection processing unit. In a specific implementation, when the voltages at the two ends of the first contactor are the same, the first contactor is closed, a first closed state may be generated, and the first closed state may be transmitted to the disconnection processing unit. If the first voltage testing submodule tests the currents at the two ends of the first contactor, the first closed state submodule can generate a first closed state when the currents at the two ends of the first contactor are the same, and sends the first closed state to the on-off processing unit.

And the first disconnection state submodule 10413 is configured to generate a first disconnection state when the voltages at the two ends of the first contactor are tested to be different, and send the first disconnection state to the disconnection processing unit.

In a specific implementation, if voltages at two ends of the first contactor are different, it may be determined that the first contactor is turned off. When the first contactor is disconnected, the voltage of the connection end of the first contactor and the driving motor controller is infinite, the voltage of one end of the first contactor is infinite, the voltage of the other end of the first contactor is infinite, and the voltages of the two ends of the first contactor are completely different, so that the disconnection of the first contactor can be judged.

In a specific implementation, the currents at the two ends of the first contactor may also be determined, and if the currents at the two ends of the first contactor are different, the first contactor is turned off. When the driving motor controller charges the power battery, when the first contactor is disconnected, the voltage of the connecting end of the first contactor and the driving motor controller has current, the voltage of the connecting end of the first contactor and the power battery has no current, and the current values of the two ends of the first contactor are different, so that the disconnection of the first contactor can be judged.

The second testing module 1042 is configured to test a second open/close state of the second contactor, and send the second open/close state to the disconnection processing unit.

In a specific implementation, the second testing module 1042 may test a second open-close state of the second contactor, send the second open-close state to the disconnection processing unit 1043, and the disconnection processing unit 1043 controls the interlock loop to be turned on or off according to the second open-close state.

Referring to fig. 5, a schematic structural diagram of an embodiment of the second test module of the present application, in this embodiment, the second test module 1042 may include the following sub-modules:

the second voltage testing submodule 10421 is configured to test whether voltages at two ends of the second contactor are the same;

in this embodiment, the second voltage testing submodule may directly test the voltage at two ends of the second contactor, or may directly test the current at two ends of the second contactor. The skilled person can set the method arbitrarily according to the actual situation, and the application is not limited to this.

The second closing state submodule 10422 is configured to generate a second closing state when voltages at two ends of the second contactor are tested to be the same, and send the second closing state to the disconnection processing unit;

in a specific implementation, when the voltages at the two ends of the second contactor are the same, the second contactor is closed, a second closed state may be generated, and the second closed state may be transmitted to the disconnection processing unit. If the first voltage testing submodule tests the currents at the two ends of the first contactor, the first closed state submodule can generate a first closed state when the currents at the two ends of the first contactor are the same, and sends the first closed state to the on-off processing unit.

And the second disconnection state submodule 10423 is configured to generate a second disconnection state when the voltages at the two ends of the second contactor are tested to be different, and send the second disconnection state to the disconnection processing unit.

In a specific implementation, if the voltages at the two ends of the second contactor are different, it may be determined that the second contactor is turned off. When the second contactor is disconnected, the voltage of the connection end of the second contactor and the driving motor controller is infinite, the voltage of one end of the second contactor is infinite, the voltage of the other end of the second contactor is infinite, and the voltages of the two ends of the second contactor are completely different, so that the disconnection of the second contactor can be judged.

In a specific implementation, the currents at the two ends of the second contactor may also be determined, and if the currents at the two ends of the second contactor are different, the second contactor is turned off. When the driving motor controller charges the power battery, when the second contactor is disconnected, the voltage of the connecting end of the second contactor and the driving motor controller has current, the voltage of the connecting end of the second contactor and the power battery has no current, and the current values of the two ends of the second contactor are different, so that the disconnection of the second contactor can be judged.

The opening and closing processing unit 1043 is configured to generate a closing signal when the first opening and closing state and the second opening and closing state are both closed states, and control the interlock loop to be switched on according to the closing signal; and when the first opening and closing state or the opening and closing state is a disconnection state, generating a disconnection signal, and controlling the interlock loop to be disconnected according to the disconnection signal.

In a specific implementation, the open-close processing unit may receive the first closed state, the first open state, the second closed state, or the second open state.

If the on-off processing unit receives the first closed state and the second closed state, a closed signal can be generated, and then the interlocking loop is controlled to be conducted according to the closed signal; if the disconnection processing unit receives the first closing state and the second disconnection state, a disconnection signal can be generated, and then the interlocking circuit is controlled to be disconnected according to the disconnection signal; if the disconnection processing unit receives the first disconnection state and the second disconnection state, a disconnection signal can be generated, and then the interlocking circuit is controlled to be disconnected according to the disconnection signal; if the disconnection processing unit receives the first disconnection state and the second disconnection state, a disconnection signal can be generated, and then the interlock circuit is controlled to be disconnected according to the disconnection signal.

An interlock loop 105 for controlling the driving motor controller to charge the power battery when conducting; and controlling the driving motor controller to stop charging the power battery when the power battery is disconnected.

In a specific implementation, the interlocking circuit is used for sending out a prompt alarm, and when the interlocking circuit identifies danger, such as the disconnection of the first contactor or the second contactor, no matter whether the vehicle is in a running state or not, the interlocking circuit can send out the prompt alarm in a certain form to remind a driver of timely handling. The interlock loop may also tell the system controller to disconnect the high voltage and stop the power supply from the power battery when the interlock loop detects a hazard while the vehicle is at a standstill. The interlocking loop can also reduce the running power of the driving motor when the danger is identified in the running process of the electric automobile, so that the speed of the automobile is reduced, the driving motor controller system works under a smaller load, a driver is stopped at the same time within a certain time, and the next fault analysis is facilitated.

In this embodiment, the interlock circuit may control the driving motor controller to stop charging the power battery when the processing module detects that one of the first contactor and the second contactor is opened, or may control the driving motor controller to continue charging the power battery when the checking module detects that the first contactor and the second contactor are closed simultaneously.

In one embodiment, the Interlock loop may be a High Voltage Interlock loop (called a High Voltage Interlock System and Control loop). The high-voltage interlocking loop can check all branches connected with the high-voltage bus on the electric automobile by using a low-voltage signal, can comprise the electrical connection integrity of a whole battery system, a lead, a connector, a DCDC, a motor controller, a high-voltage box, a protective cover and other system loops, and can also detect whether the connection between the driving motor controller and the power battery is disconnected.

In this embodiment, the interlock loop 105 may include:

the interlocking loop also comprises a built-in power supply, and the built-in power supply is sequentially connected with the control switch and the retrieval circuit to form a loop.

And the control switch is used for receiving the closing signal and closing the switch according to the closing signal, or receiving the opening signal and opening the switch according to the opening signal.

In this embodiment, the disconnection processing unit 1043 may be connected to the control switch, the disconnection processing unit may generate a close signal and send the close signal to the control switch, and after the control switch receives the close signal, the control switch closes the switch, and the entire interlock loop is turned on. If the disconnection processing unit generates a disconnection signal and sends the disconnection signal to the control switch, the control switch disconnects the switch after receiving the disconnection signal, and the whole interlock loop is disconnected.

The on-off processing unit sends an off signal or an on signal to the control switch so as to control the on-off of the control switch; the interlocking circuit can be controlled to be switched on or switched off by controlling the on or off of the control switch, so that whether the first contactor or the second contactor on the distribution box of the driving motor controller is disconnected or not is informed according to the on or off state of the interlocking circuit, and the driving motor controller can also know whether the interlocking circuit is disconnected with the power motor or not, so that the situation that when the driving motor controller is disconnected with the power battery, the driving motor controller cannot stop working immediately and directly stores electric energy in a bus capacitor in the driving motor controller, the bus capacitor is overloaded, and parts are damaged can be avoided.

In this embodiment, the detection circuit may control the driving motor controller to charge the power battery when the switch is closed, and the detection circuit may control the driving motor controller to stop charging the power battery when the switch is opened.

Whether the driving motor controller works or not can be directly controlled through the detection circuit, and the driving motor controller can be immediately controlled to stop working when any one of the first contactor or the second contactor is disconnected, so that the working efficiency is improved, and the prompt time when the first contactor or the second contactor is disconnected can be shortened.

Referring to fig. 6, a circuit schematic of one embodiment of the detection circuit is shown.

The detection circuit comprises a light emitter and a pull-up circuit; the pull-up circuit comprises a light receiver and a pull-up resistor R1, the pull-up resistor is connected between an internal power supply VCC of the drive motor controller and a grounding terminal, and the light receiver is connected between the VCC and the pull-up resistor R1; the light emitter is connected into the interlocking loop;

the driving motor controller 103 includes a control unit and a charging module, and the control unit is connected with an output end between the light receiver and the pull-up resistor R1 in the pull-up circuit.

In this embodiment, the light receiver and the light emitter may constitute an optical coupling device.

The illuminator is used for illuminating when the interlocking loop is switched on and not illuminating when the interlocking loop is switched off;

the light receiver is used for being switched on when light is detected so that VCC outputs high level to the control unit, and is switched off when light is not detected so that VCC outputs low level to the control unit;

the control unit is used for receiving a high level or a low level;

the charging module is used for charging the power battery if the control unit receives the high level; and the control unit is used for stopping charging the power battery if the control unit receives the low level.

In this embodiment, the light emitter may be a light emitting diode, the light receptor may be a phototransistor, the light emitting diode may be connected to the interlock loop, the phototransistor may be connected to the internal power VCC of the driving motor controller, and the light emitter is powered from the VCC to the phototransistor.

In a specific implementation, when the control switch closes the switch, the interlock loop is conducted, current flows into the light emitting diode, the light emitting diode emits light, and the phototriode is conducted after receiving light, so that the VCC can be a high level output to the control unit at the output end of the phototriode.

When the control switch is disconnected with the switch, the interlocking loop is disconnected, no current flows into the light-emitting diode, the light-emitting diode does not emit light, the phototriode is not lighted and is not conducted, and the output end of the phototriode sends a low level to the control unit.

The control unit can be responsible for receiving high level or low level, and when control module received high level, the module of charging can continue to charge to power battery, and when control module received low level, the module of charging can stop to power battery charging. The time for the drive motor controller to enter the protection action can be shortened, thereby reducing the risk of machine part damage.

In this embodiment, the processing module may also be connected to the connector to detect the state of the connector, so as to detect whether the connection loop between the driving motor controller and the power battery is abnormally disconnected. The present application is not limited thereto. In an optional embodiment of the application, when the automobile runs, the power battery converts the electric energy into the electric energy required by the driving motor through the driving motor controller, and when the automobile slides, the driving motor controller can convert the electric energy of the driving motor into the charging electric energy of the power battery for energy recovery. When energy recovery is carried out, a processing module detects the opening and closing states of a first contactor and a second contactor, and controls the interlocking loop to be conducted when the first contactor and the second contactor are both in a closed state; when the first contactor or the second contactor is in an open state, controlling the interlocking loop to be opened; controlling the driving motor controller to charge the power battery when the power battery is switched on; and controlling the driving motor controller to stop charging the power battery when the power battery is disconnected. Whole detecting system simple structure, it is fast to detect, driving motor controller can be when the electric energy is retrieved, can get into the protection action rapidly when the contactor disconnection, thereby avoid driving motor controller's voltage just surpass the withstand voltage value of devices such as electric capacity, power device and damage the device, thereby can avoid leading to whole car to lose power because of the part damages and influence driver and vehicle safety of traveling, improve car factor of safety, increase driving system's urgent strain capacity, improve driving system's life, improve user's use experience.

Referring to fig. 7, a schematic structural diagram of an embodiment of the detection system of the motor controller of the electric vehicle according to the present application is shown. In this embodiment, the power distribution box includes a power battery 701, a power distribution box 702, a driving motor controller 703, a processing module 704, an interlock loop 705, and a driving motor 706, where the power distribution box includes two contactors, a first contactor K + and a second contactor K-, the two contactors are respectively connected to the processing module 704, the processing module 704 respectively detects the open/close states of the first contactor and the second contactor, two ends of the first contactor K + are respectively connected to the positive electrode of the power battery and the driving motor controller, two ends of the second contactor K-are respectively connected to the negative electrode of the power battery and the driving motor controller, the interlock loop 705 includes a control switch K1 and a detection circuit 7051, the control switch K1 is connected to the processing module 704, the driving motor controller includes a control unit 7031, the control unit 7031 is connected to the detection circuit 7051, the driving motor controller 703 is connected to the driving motor 706, the dashed lines in fig. 4 are interlock loops 705. In this embodiment, the interlock loop is an HVIL high voltage interlock loop.

When energy recovery is started, the driving motor controller 703 converts alternating current electric energy of the driving motor 706 into direct current electric energy to be output to the power battery for charging, the processing module 704 starts to detect the opening and closing states of the first contactor K + and the second contactor K-, the processing module 704 sends the opening and closing states to the control switch K1, the control switch K1 controls the opening or closing of the interlocking loop, and the detection circuit controls the motor controller to charge or stop charging according to the opening or closing of the interlocking loop.

If the processing module 704 detects that the first contactor K + and the second contactor K-are both in the closed state, the processing module 704 sends the closed state to the control switch K1, the control switch K1 closes the switch according to the closed state, the interlock loop 705 is turned on when the control switch K1 is closed, the detection circuit 7051 is turned on when the interlock loop 705 is turned on, the detection circuit 7051 may send a turn-on signal to the control unit 7031, and the control unit 7031 may control the driving motor controller 703 to continue to charge the power battery according to the turn-on signal.

If the processing module 704 detects that any one of the first contactor K + and the second contactor K-is in an off state, or detects that both the first contactor K + and the second contactor K-are off, the processing module 704 sends the off state to the control switch K1, the control switch K1 turns off the switch according to the off state, the interlock loop 705 is turned off when the control switch K1 is turned off, the detection circuit 7051 is turned off when the interlock loop 705 is turned off, the detection circuit 7051 can send a turn-off signal to the control unit 7031, and the control unit 7031 can control the driving motor controller 703 to stop charging the power battery according to the turn-on signal.

If the contactor is abnormally disconnected, the drive motor controller can continuously charge the bus capacitor, the time from the zero voltage value of the bus capacitor to the time when the voltage value of the bus capacitor reaches the hardware overvoltage protection threshold triggered by the drive motor controller is the first protection time, when the bus capacitor is fully charged and reaches the overvoltage threshold, the drive motor controller reaches the protection action as a second protection time through self algorithm or logic processing time, because the setting of the drive motor controller is fixed, the second guard time for the typical drive motor controller to reach the guard motion after its own algorithmic or logical processing time is relatively fixed, the first protection time is set as the time from the time when the bus capacitor starts to be charged from the zero voltage value to the time when the voltage value of the bus capacitor reaches the hardware overvoltage protection threshold triggered by the driving motor controller, and the capacitance value of the bus capacitor can be specifically adjusted.

By adopting the embodiment of the application, the output voltage can be immediately stopped before the bus capacitor is charged by the driving motor controller, the alternating current energy is stopped being converted into the direct current energy, and the protection action is immediately started, so that the time from the bus capacitor being charged from the zero voltage value to the time when the voltage value of the bus capacitor reaches the driving motor controller triggering hardware overvoltage protection threshold value can be prolonged to be the first protection time, and the risk of the failure of the machine part is reduced.

Referring to fig. 8, a flow chart illustrating steps of one embodiment of a detection method for a motor controller of an electric vehicle according to the present application is shown;

the electric vehicle motor controller can be connected with a detection system, and the detection system can comprise: the power battery, the distribution box, the driving motor controller, the processing module and the interlocking loop, wherein the distribution box can be provided with a contactor, two ends of the contactor can be respectively connected with the power battery and the driving motor controller, the processing module can be connected with the contactor, and the interlocking loop can be communicated with the processing module and the driving motor controller;

the method specifically comprises the following steps:

step 801, when the driving motor controller recovers energy, the processing module detects the opening and closing state of the contactor; when the contactor is in a closed state, the processing module controls the interlocking loop to be conducted; and when the contactor is in an open state, the processing module controls the interlocking loop to be opened.

In a specific implementation, the processing module may include: the system comprises a switching-on/switching-off processing unit, a first testing module and a second testing module, wherein the first testing module and the second testing module are respectively connected with the switching-on/switching-off processing unit;

in this embodiment, step 801 may include the following sub-steps:

in sub-step 8011, when the driving motor controller recovers energy, the first testing module tests a first open/close state of the first contactor, and sends the first open/close state to the disconnection processing unit.

In this embodiment, the sub-step 8011 may further comprise the sub-steps of:

sub-step 80111, the first testing module tests whether the voltages across the first contactor are the same.

Sub-step 80112, the first testing module generates a first closed state and sends the first closed state to the disconnection processing unit when testing the voltages at both ends of the first contactor to be the same.

In sub-step 80113, when the voltages at the two ends of the first contactor are tested to be different, the first testing module generates a first off state and sends the first off state to the on/off processing unit.

Substep 8012, the second testing module tests a second open/close state of the second contactor and sends the second open/close state to the cut-off processing unit;

in this embodiment, the sub-step 8012 may further comprise the sub-steps of:

sub-step 80121, the second testing module tests whether the voltages across the second contactor are the same.

Sub-step 80122, the second testing module generating a second closing status and sending the second closing status to the disconnection processing unit when testing the same voltage across the second contactor.

In sub-step 80123, when the voltages at the two ends of the second contactor are tested to be different, the second testing module generates a second off state and sends the second off state to the on/off processing unit.

Sub-step 8013, the opening and closing processing unit generates a closing signal when the first opening and closing state and the second opening and closing state are both closed states, and controls the interlock loop to be conducted according to the closing signal; and when the first opening and closing state or the second opening and closing state is a disconnection state, generating a disconnection signal, and controlling the interlock loop to be disconnected according to the disconnection signal.

Step 802, when the interlock loop is conducted, the interlock loop controls the driving motor controller to charge the power battery; when the interlocking loop is disconnected, the interlocking loop controls the driving motor controller to stop charging the power battery.

In a specific implementation, the interlock loop comprises a control switch and a detection circuit, the control switch is connected with the detection circuit, and the control switch is connected with the on-off processing unit;

in this embodiment, step 802 may include the following sub-steps:

sub-step 8021, the control switch receives the close signal and closes the switch according to the close signal, or receives the open signal and opens the switch according to the open signal.

A substep 8022, the detection circuit is conducted when the control switch is closed, and controls the driving motor controller to charge the power battery; and the detection circuit is disconnected when the control switch is disconnected with the switch, and controls the driving motor controller to stop charging the power battery.

In a specific implementation, the detection circuit comprises a light emitter, a pull-up circuit; the pull-up circuit comprises a light receiver and a pull-up resistor, the pull-up resistor is connected between an internal power supply VCC of the drive motor controller and a grounding terminal, and the light receiver is connected between the VCC and the pull-up resistor; the illuminator is connected into the interlocking loop, and emits light when the interlocking loop is connected and does not emit light when the interlocking loop is disconnected;

in this embodiment, the sub-step 8022 may further include the following sub-steps:

substep 80221, the light emitter emits light when the interlock loop is on and does not emit light when the interlock loop is off;

a substep 80222, in which the light receiver is turned on when light is detected to make the VCC output a high level to the control unit, and is turned off when light is not detected to make the VCC output a low level to the control unit;

a sub-step 80223, the control unit receiving a high level or a low level;

substep 80224, if the control unit receives a high level, the charging module charges the power battery; and if the control unit receives a low level, the charging module stops charging the power battery.

The application also provides a vehicle which is provided with the detection system of the electric vehicle motor controller with the technical characteristics in the embodiment.

An embodiment of the present application also provides a vehicle, which may include a processor, a memory, and a computer program stored on the memory and capable of being executed on the processor, wherein the computer program, when executed by the processor, implements the steps of the system operation as described above.

An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of one or more methods as described in the embodiments of the present application.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The above detailed description is given to the detection system of the electric vehicle motor controller and the detection method of the electric vehicle motor controller, and a specific example is applied in the description to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The detection system of the motor controller of the electric automobile is characterized by comprising a power battery, a distribution box, a driving motor controller, a processing module and an interlocking loop, wherein the distribution box is provided with a contactor, two ends of the contactor are respectively connected with the power battery and the driving motor controller, the processing module is connected with the contactor, and the interlocking loop is communicated with the processing module and the driving motor controller;

the interlocking loop is used for controlling the driving motor controller to charge the power battery when the interlocking loop is conducted; when the interlocking loop is disconnected, controlling the driving motor controller to stop charging the power battery;

the processing module comprises a disconnection processing unit, the interlocking loop comprises a control switch and a detection circuit, the control switch is connected with the detection circuit, and the control switch is connected with the disconnection processing unit;

2. The system of claim 1, wherein the processing module comprises: the first test module and the second test module are respectively connected with the on-off processing unit, the on-off processing unit is connected with the interlocking loop, the contactor comprises a first contactor and a second contactor, the first test module is connected with the first contactor, and the second test module is connected with the second contactor;

the on-off processing unit is used for generating a closing signal when the first on-off state and the second on-off state are both closed states, and controlling the interlocking loop to be conducted according to the closing signal; and when the first opening and closing state or the second opening and closing state is a disconnection state, generating a disconnection signal, and controlling the interlock loop to be disconnected according to the disconnection signal.

3. The system of claim 2, wherein the first testing module comprises:

4. The system of claim 2, wherein the second testing module comprises:

5. The system of claim 1, wherein the detection circuit comprises a light emitter, a pull-up circuit; the pull-up circuit comprises a light receiver and a pull-up resistor, the pull-up resistor is connected between an internal power supply VCC of the drive motor controller and a grounding terminal, and the light receiver is connected between the VCC and the pull-up resistor; the illuminator is connected into the interlocking loop, and emits light when the interlocking loop is connected and does not emit light when the interlocking loop is disconnected;

the control unit is used for receiving a high level or a low level;

the charging module is used for charging the power battery when the control unit receives a high level; and when the control unit receives a low level, stopping charging the power battery.

6. The detection method of the electric vehicle motor controller is characterized in that the electric vehicle motor controller is connected with a detection system, and the detection system comprises: the power battery, the distribution box, the driving motor controller, the processing module and the interlocking loop are arranged, the distribution box is provided with a contactor, two ends of the contactor are respectively connected with the power battery and the driving motor controller, the processing module is connected with the contactor, and the interlocking loop is communicated with the processing module and the driving motor controller;

the method comprises the following steps:

when the interlocking loop is conducted, the interlocking loop controls the driving motor controller to charge the power battery; when the interlocking loop is disconnected, the interlocking loop controls the driving motor controller to stop charging the power battery;

the detection circuit is conducted when the control switch is closed, and controls the driving motor controller to charge the power battery; and the detection circuit is disconnected when the control switch is disconnected with the switch, and controls the driving motor controller to stop charging the power battery.

7. The method of claim 6, wherein the processing module comprises: the first test module and the second test module are respectively connected with the on-off processing unit, the on-off processing unit is connected with the interlocking loop, the contactor comprises a first contactor and a second contactor, the first test module is connected with the first contactor, and the second test module is connected with the second contactor;

the on-off processing unit generates a closing signal when the first on-off state and the second on-off state are both closed states, and controls the interlocking loop to be conducted according to the closing signal; and when the first opening and closing state or the second opening and closing state is a disconnection state, generating a disconnection signal, and controlling the interlock loop to be disconnected according to the disconnection signal.

8. The method of claim 7, wherein the first testing module testing a first open and closed state of the first contactor and sending the first open and closed state to the disconnection processing unit comprises:

9. The method of claim 7, wherein the second testing module testing a second open and closed state of the second contactor and sending the second open and closed state to the disconnection processing unit comprises:

10. The method of claim 6, wherein the detection circuit comprises a light emitter, a pull-up circuit; the pull-up circuit comprises a light receiver and a pull-up resistor, the pull-up resistor is connected between an internal power supply VCC of the drive motor controller and a grounding terminal, and the light receiver is connected between the VCC and the pull-up resistor; the illuminator is connected into the interlocking loop, and emits light when the interlocking loop is connected and does not emit light when the interlocking loop is disconnected;

the control unit receives a high level or a low level;

when the control unit receives a high level, the charging module charges the power battery; when the control unit receives a low level, the charging module stops charging the power battery.

11. The detection system of the motor controller of the electric automobile is characterized by comprising a power battery, a distribution box, a driving motor controller, a processing module and an interlocking loop, wherein the distribution box is provided with two contactors, namely a first contactor and a second contactor, the two ends of the first contactor are respectively connected with the anode of the power battery and the driving motor controller, the two ends of the second contactor are respectively connected with the cathode of the power battery and the driving motor controller, the processing module is respectively connected with the first contactor and the second contactor, the interlocking loop is provided with a control switch, the processing module is connected with the control switch, and the interlocking loop is communicated with the processing module and the driving motor controller;

12. A vehicle equipped with a detection system of a motor controller for an electric vehicle according to any one of claims 1 to 5.

13. One or more machine readable media having instructions stored thereon that, when executed by one or more processors, cause the processors to perform the method of one or more of claims 6-10.