CN111483320B - Electric automobile high-voltage distribution box relay monitoring system and method - Google Patents
Electric automobile high-voltage distribution box relay monitoring system and method Download PDFInfo
- Publication number
- CN111483320B CN111483320B CN202010375211.9A CN202010375211A CN111483320B CN 111483320 B CN111483320 B CN 111483320B CN 202010375211 A CN202010375211 A CN 202010375211A CN 111483320 B CN111483320 B CN 111483320B
- Authority
- CN
- China
- Prior art keywords
- relay
- air conditioner
- voltage
- power supply
- normally open
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a relay monitoring system and a method for a high-voltage distribution box of an electric vehicle, wherein a voltage detection module is added in the high-voltage distribution box, the actuation and disconnection information of the relay is sent to a vehicle control unit, and under the power-on and power-off and normal states, the real-time detection and judgment of each state of the relay and the output of the fault state and the normal state timely ensure the normal operation of the high-voltage distribution box of the electric automobile, when a problem occurs, the information can be reported to a driver at the fastest speed so as to remind the driver to contact related workers to overhaul as soon as possible, the running states of other related high-pressure parts on the vehicle can be monitored at the fastest speed, the relay is timely overhauled after being damaged, the safety of the electric automobile power distribution device is improved to a greater extent, and therefore the risk of the whole automobile safety of the electric automobile is reduced.
Description
Technical Field
The invention relates to the technical field of high-voltage distribution boxes of electric vehicles, in particular to a relay monitoring system and method for a high-voltage distribution box of an electric vehicle.
Background
The high-voltage distribution of the electric automobile is to transmit the electricity in the battery to each high-voltage component through a high-voltage distribution device, and in order to save power resources and ensure the safety of power utilization facilities to the maximum extent, the distribution box can be provided with high-voltage relays with various currents.
However, the high-voltage distribution box used before does not detect the state of the relay in the high-voltage distribution box in real time, and no equipment knows the real condition of the relay in the high-voltage distribution box, so that the relay is out of control if the condition of the relay is not monitored and controlled.
If the relay causes the adhesion because some device problems, and the problem does not find, also do not know to the relay situation, can increase high tension switchgear's safety problem, and then influence whole car safety.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a system and a method for monitoring a relay of a high voltage distribution box of an electric vehicle, which can detect the state of the relay in the fastest time, facilitate analysis of the relay, analysis of the cause of adhesion, find out a corresponding fault, solve the problem in time, and improve the safety of the electric vehicle.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an electric automobile high voltage distributor box relay monitored control system, includes: the system comprises a power supply unit, a high-voltage distribution box, a motor controller, a motor and an air conditioner, wherein the power supply unit is respectively connected with the motor controller and the air conditioner through the high-voltage distribution box; the high-voltage distribution box is internally provided with a voltage detection module, a contactor controller, a power supply circuit and a signal circuit; the power supply unit is respectively connected with the motor controller and the air conditioner through a power supply circuit, and the voltage detection module is used for detecting the voltage of the front end and the rear end of the power supply circuit and sending voltage data to the vehicle control unit through a signal circuit; the vehicle control unit judges the relay state of the power supply circuit according to the voltage data and sends a control signal to the contactor controller through a signal circuit; and the contactor controller is used for controlling a relay in the power supply circuit according to a control signal sent by the vehicle control unit.
Further, the power supply circuit includes: the system comprises a power supply unit Y, a pre-charging resistor R1, a motor controller U1, a motor U2, an air conditioner U3, a contactor controller U4, a motor fuse F1, an air conditioner fuse F2, a pre-charging relay K1, a main positive relay K2, an air conditioner relay K3 and a main negative relay K4.
The positive electrode of the power supply unit Y is respectively connected with one end of a pre-charging resistor R1, one end of a normally open contact K2-1 of a main positive relay K2 and one end of an air conditioner fuse F2, the other end of the pre-charging resistor R1 is connected with one end of a normally open contact K1-1 of a pre-charging relay K1, the other end of the normally open contact K1-1 of a pre-charging relay K1 is respectively connected with the other end of the normally open contact K2-1 of a main positive relay K2 and one end of a motor fuse F1, and the other end of the motor fuse F1 is connected with the positive input end of a motor controller U1; the other end of the air conditioner fuse F2 is connected with one end of a normally open contact K3-1 of an air conditioner relay K3, and the other end of the normally open contact K3-1 of the air conditioner relay K3 is connected with the positive input end of an air conditioner U3; the negative electrode of the power supply unit Y is connected with one end of a normally open contact K4-1 of a main negative relay K4, and the other end of the normally open contact K4-1 of the main negative relay K4 is connected with the negative input end of a motor controller U1 and the negative input end of an air conditioner U3 respectively; the output end of the motor controller U1 is connected with the input end of the motor U2.
The first output end of the contactor controller U4 is grounded after being connected with a pre-charging relay K1 in series, the first output end of the contactor controller U4 is grounded after being connected with a main positive relay K2 in series, the third output end of the contactor controller U4 is grounded after being connected with an air-conditioning relay K3 in series, and the fourth output end of the contactor controller U4 is grounded after being connected with a main negative relay K4 in series.
Furthermore, a plurality of detection points for testing the front and rear end voltages by the voltage detection module are also arranged in the power supply circuit; the detection point includes: the device comprises a front-end detection point A, a first reference point B, a second reference point C, a rear-end No. 1 detection point D, a rear-end No. 2 detection point E and a rear-end No. 3 detection point F; the front-end detection point A is arranged on a lead between the positive electrode of the power supply unit Y and one end of a normally open contact K2-1 of a main positive relay K2; the first reference point B is arranged on a lead between the negative electrode of the power supply unit Y and one end of a normally open contact K4-1 of the main negative relay K4; the second reference point C is arranged on a lead between the positive electrode of the power supply unit Y and one end of the pre-charging resistor R1; the rear end No. 1 detection point D is arranged on a lead between the other end of a normally open contact K2-1 of the main positive relay K2 and one end of a motor fuse F1; the rear end No. 2 detection point E is arranged on a lead between the other end of the normally open contact K3-1 of the air conditioner relay K3 and the positive input of the air conditioner U3; and the rear end No. 3 detection point F is arranged on a lead between the other end of the normally open contact K4-1 of the main negative relay K4 and the positive input end of the motor controller U1.
Further, the signal circuit includes: the system comprises a voltage detection module, a contactor controller, a vehicle control unit and an instrument; and the vehicle control unit is respectively in signal connection with the voltage detection module, the contactor controller and the instrument.
Correspondingly, the invention also discloses a method for monitoring the relay of the high-voltage distribution box of the electric automobile, which comprises the following steps: the vehicle control unit sends a control signal to the contactor controller to control the relay of the power supply circuit to act;
the voltage detection module detects the front and rear end voltages of the power supply circuit and sends voltage data to the vehicle control unit through the signal circuit;
the vehicle control unit obtains a state judgment value of the relay by using a preset algorithm according to the voltage data;
and the vehicle control unit judges whether the corresponding relay is abnormal according to the control signal and the state judgment value, and if so, the vehicle control unit feeds back the corresponding relay through the instrument.
Further, the control signal includes: a pre-charge control signal, a motor start signal and an air conditioner start signal. The action of the pre-charging control signal control relay comprises the following steps: and closing a normally open contact K1-1 of the pre-charging relay K1 and a normally open contact K4-1 of the main negative relay K4. The action of the motor starting signal control relay comprises the following steps: after the pre-charging control signal is executed, the normally open contact K2-1 of the main positive relay K2 is closed, and then the normally open contact K1-1 of the pre-charging relay K1 is opened. The action of the air conditioner starting signal control relay comprises the following steps: and closing a normally open contact K3-1 of the air conditioner relay K3.
Further, the front and back terminal voltages of the power supply circuit specifically include: the voltage value a of the front end detection point A, the voltage value B of the first reference point B, the voltage value C of the second reference point C, the voltage value D of the rear end No. 1 detection point D, the voltage value E of the rear end No. 2 detection point E and the voltage value F of the rear end No. 3 detection point F.
Further, the obtaining of the state judgment value of the relay by the vehicle control unit according to the voltage data by using a preset algorithm includes: setting a front end voltage value X1, a first rear end voltage value X2, a second rear end voltage value X3 and a third rear end voltage value X4, wherein X1 is a-b, X2 is d-b, X3 is e-b, and X4 is c-f; setting a motor relay state judgment value Y1, an air conditioner relay state judgment value Y2 and a main and negative relay state judgment value Y3; wherein Y1-X1-X2, Y2-X1-X3, and Y3-X1-X4.
Further, the vehicle control unit judging whether the corresponding relay is abnormal according to the control signal and the state judgment value includes:
when the current control signal is the pre-charging control signal, if Y1 ═ 0, Y2 ≠ 0, and Y3 ═ 0, all relays are normal; otherwise, if Y1 ≠ 0, the pre-charge relay K1 is abnormal, if Y2 ≠ 0, the air-conditioning relay K3 is abnormal, and if Y3 ≠ 0, the main-negative relay K4 is abnormal;
when the current control signal is a motor starting signal, if Y1 is equal to 0, Y2 is not equal to 0, and Y3 is equal to 0, all relays are normal; otherwise, if Y1 ≠ 0, the main positive relay K2 is abnormal, if Y2 ≠ 0, the air-conditioning relay K3 is abnormal, and if Y3 ≠ 0, the main negative relay K4 is abnormal;
when the current control signal is an air conditioner starting signal, if Y1 is equal to 0, Y2 is equal to 0 and Y3 is equal to 0, all relays are normal; otherwise, if Y1 ≠ 0, the main positive relay K2 is abnormal, if Y2 ≠ 0, the air-conditioning relay K3 is abnormal, and if Y3 ≠ 0, the main negative relay K4 is abnormal.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a relay monitoring system and a method for a high-voltage distribution box of an electric vehicle, wherein a voltage detection module is added in the high-voltage distribution box, the actuation and disconnection information of the relay is sent to a vehicle control unit, and under the power-on and power-off and normal states, the real-time detection and judgment of each state of the relay and the output of the fault state and the normal state timely ensure the normal operation of the high-voltage distribution box of the electric automobile, when a problem occurs, the information can be reported to a driver at the fastest speed so as to remind the driver to contact related workers to overhaul as soon as possible, the running states of other related high-pressure parts on the vehicle can be monitored at the fastest speed, the relay is timely overhauled after being damaged, the safety of the electric automobile power distribution device is improved to a greater extent, and therefore the risk of the whole automobile safety of the electric automobile is reduced.
In conclusion, the invention has simple structure, and only one voltage detection module is added on the common high-voltage box; the invention improves the safety of the system, has few system components, and can control the whole vehicle controller by adopting a step-by-step real-time detection control method; in addition, the invention has high reliability, wide application of the voltage detection module, very high reliability and more accurate detection on the high-voltage distribution box system.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a circuit schematic of the power supply circuit of the present invention.
Fig. 2 is a circuit schematic of the signal circuit of the present invention.
FIG. 3 is a flow chart of the method of the present invention.
FIG. 4 is a flow chart of a method for monitoring a relay before driving according to the present invention.
FIG. 5 is a flow chart of a method of relay monitoring after vehicle start in accordance with the present invention.
FIG. 6 is a flow chart of a method for monitoring a relay after an air conditioner is started during driving.
FIG. 7 is a flow chart of a method for monitoring a relay after an air conditioner is turned off during driving.
FIG. 8 is a flow chart of a method for monitoring a relay after the vehicle is powered off.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The first embodiment is as follows:
this embodiment discloses electric automobile high voltage distribution box relay monitored control system includes: the system comprises a power supply unit, a high-voltage distribution box, a motor controller, a motor and an air conditioner, wherein the power supply unit is respectively connected with the motor controller and the air conditioner through the high-voltage distribution box; the high-voltage distribution box is internally provided with a voltage detection module, a contactor controller, a power supply circuit and a signal circuit; the power supply unit is respectively connected with the motor controller and the air conditioner through a power supply circuit, and the voltage detection module is used for detecting the voltage of the front end and the rear end of the power supply circuit and sending voltage data to the vehicle control unit through a signal circuit; the vehicle control unit judges the relay state of the power supply circuit according to the voltage data and sends a control signal to the contactor controller through a signal circuit; and the contactor controller is used for controlling a relay in the power supply circuit according to a control signal sent by the vehicle control unit.
As shown in fig. 1, the power supply circuit includes: the system comprises a power supply unit Y, a pre-charging resistor R1, a motor controller U1, a motor U2, an air conditioner U3, a contactor controller U4, a motor fuse F1, an air conditioner fuse F2, a pre-charging relay K1, a main positive relay K2, an air conditioner relay K3 and a main negative relay K4.
The positive electrode of the power supply unit Y is respectively connected with one end of a pre-charging resistor R1, one end of a normally open contact K2-1 of a main positive relay K2 and one end of an air conditioner fuse F2, the other end of the pre-charging resistor R1 is connected with one end of a normally open contact K1-1 of a pre-charging relay K1, the other end of the normally open contact K1-1 of a pre-charging relay K1 is respectively connected with the other end of the normally open contact K2-1 of a main positive relay K2 and one end of a motor fuse F1, and the other end of the motor fuse F1 is connected with the positive input end of a motor controller U1; the other end of the air conditioner fuse F2 is connected with one end of a normally open contact K3-1 of an air conditioner relay K3, and the other end of the normally open contact K3-1 of the air conditioner relay K3 is connected with the positive input end of an air conditioner U3; the negative electrode of the power supply unit Y is connected with one end of a normally open contact K4-1 of a main negative relay K4, and the other end of the normally open contact K4-1 of the main negative relay K4 is connected with the negative input end of a motor controller U1 and the negative input end of an air conditioner U3 respectively; the output end of the motor controller U1 is connected with the input end of the motor U2.
The first output end of the contactor controller U4 is grounded after being connected with a pre-charging relay K1 in series, the first output end of the contactor controller U4 is grounded after being connected with a main positive relay K2 in series, the third output end of the contactor controller U4 is grounded after being connected with an air-conditioning relay K3 in series, and the fourth output end of the contactor controller U4 is grounded after being connected with a main negative relay K4 in series.
A plurality of detection points for testing the front and rear end voltages by the voltage detection module are also arranged in the power supply circuit; the detection point includes: the device comprises a front-end detection point A, a first reference point B, a second reference point C, a rear-end No. 1 detection point D, a rear-end No. 2 detection point E and a rear-end No. 3 detection point F; the front-end detection point A is arranged on a lead between the positive electrode of the power supply unit Y and one end of a normally open contact K2-1 of a main positive relay K2; the first reference point B is arranged on a lead between the negative electrode of the power supply unit Y and one end of a normally open contact K4-1 of the main negative relay K4; the second reference point C is arranged on a lead between the positive electrode of the power supply unit Y and one end of the pre-charging resistor R1; the rear end No. 1 detection point D is arranged on a lead between the other end of a normally open contact K2-1 of the main positive relay K2 and one end of a motor fuse F1; the rear end No. 2 detection point E is arranged on a lead between the other end of the normally open contact K3-1 of the air conditioner relay K3 and the positive input of the air conditioner U3; and the rear end No. 3 detection point F is arranged on a lead between the other end of the normally open contact K4-1 of the main negative relay K4 and the positive input end of the motor controller U1.
As shown in fig. 2, the signal circuit includes: the system comprises a voltage detection module, a contactor controller, a vehicle control unit and an instrument; and the vehicle control unit is respectively in signal connection with the voltage detection module, the contactor controller and the instrument.
In the embodiment, the voltage detection device is used for detecting the voltage of the front end and the back end of the power supply circuit; the vehicle control unit judges the relay states in different states; the vehicle control unit judges the reasonability of the relay states in different states by comparing the command of the relay and the relay states to form a control program; the control logic takes the problems of engineering application into consideration, and a filter device commonly used in the field is adopted for the relay state signal.
During the use, relay controller module receives the instruction about the relay of vehicle control unit through the CAN line, sends the instruction for the relay, and voltage detection module feeds back real-time voltage condition to vehicle control unit through the CAN line simultaneously, and vehicle control unit is through judging and handling, carries out the analysis with the voltage difference, reports to the CAN line as the trouble with unreasonable value, feeds back through the instrument, tells driver particular case.
Example two:
based on the electric vehicle high-voltage distribution box relay monitoring system provided by the embodiment, as shown in fig. 3, the embodiment provides an electric vehicle high-voltage distribution box relay monitoring method, which includes the following steps:
s1: and the vehicle control unit sends a control signal to the contactor controller to control the relay of the power supply circuit to act.
S2: the voltage detection module detects the front and rear end voltages of the power supply circuit and sends voltage data to the vehicle control unit through the signal circuit.
S3: and the vehicle control unit obtains a state judgment value of the relay by using a preset algorithm according to the voltage data.
S4: and the vehicle control unit judges whether the corresponding relay is abnormal according to the control signal and the state judgment value, and if so, the vehicle control unit feeds back the corresponding relay through the instrument.
Example three:
first, the control signal and the state determination value in the present embodiment are explained as follows:
1. the control signals in this embodiment include: a pre-charge control signal, a motor start signal and an air conditioner start signal.
The action of the relay corresponding to the pre-charging control signal comprises the following steps: and closing a normally open contact K1-1 of the pre-charging relay K1 and a normally open contact K4-1 of the main negative relay K4.
The action of the motor starting signal corresponding to the relay comprises the following steps: after the pre-charging control signal is executed, the normally open contact K2-1 of the main positive relay K2 is closed, and then the normally open contact K1-1 of the pre-charging relay K1 is opened.
The action of the relay corresponding to the air conditioner starting signal comprises the following steps: and closing a normally open contact K3-1 of the air conditioner relay K3.
2. Referring to fig. 1, the voltage values of the detection points tested by the voltage detection module are defined as follows:
the voltage value of the front end detection point A is a, the voltage value of the first reference point B is B, the voltage value of the second reference point C is C, the voltage value of the rear end No. 1 detection point D is D, the voltage value of the rear end No. 2 detection point E is E, and the voltage value of the rear end No. 3 detection point F is F.
Setting a front-end voltage value X1, a first rear-end voltage value X2, a second rear-end voltage value X3 and a third rear-end voltage value X4, wherein X1 is a-b, X2 is d-b, X3 is e-b, and X4 is c-f; further setting a motor relay state judgment value Y1, an air conditioner relay state judgment value Y2 and a main and negative relay state judgment value Y3; wherein Y1-X1-X2, Y2-X1-X3, and Y3-X1-X4.
Based on the second embodiment, the embodiment provides a method for monitoring a relay of a high-voltage distribution box of an electric vehicle, which specifically comprises the following steps:
1. before driving, the vehicle control unit judges whether the corresponding relay is abnormal according to the state judgment value.
At this time, since the vehicle control unit does not issue a closing command, all the relays should not be closed, that is, Y1, Y2, and Y3 are not 0, that is, it can be determined that all the relays are not stuck.
As shown in fig. 4, if the adhesion is sent, the entire vehicle relay sends the adhesion fault to the CAN line, the instrument reports the fault by collecting information on the CAN line, at this time, the instrument CAN display and find out which relay is adhered, that is, if Y1 is 0, the reason that the high-voltage device overflows is analyzed by finding out the reason of the adhesion of the relay, the problem is checked, when the motor fails all the way, the pre-charge relay K1 and the main positive relay K2 need to be checked, if Y2 is 0, the air-conditioning relay K3 needs to be checked, and if Y3 is 0, the main negative relay K4 needs to be checked.
When the detection is once and no fault is reported, the vehicle controller sends a command of closing the main and negative relays K4, the values of Y1, Y2 and Y3 still need to be judged, and when Y1 is not equal to 0, Y2 is not equal to 0 and Y3 is equal to 0, the states of all relays are normal; if Y1 is 0, through seeking relay adhesion reason, analysis high-voltage device produces the reason that overflows, carries out the investigation of problem, when sending out the trouble all the way to the motor, needs investigation preliminary filling relay K1 and main positive relay K2, if Y2 is 0, then needs investigation air conditioning relay K3 adhesion condition, if Y3 is not equal to 0, then need investigation main negative relay K4, explain the unable actuation of relay.
Thus, the monitoring of all the relays before the vehicle is finished.
2. After the vehicle is started, a Vehicle Control Unit (VCU) sequentially sends a pre-charging control signal and a motor starting signal, whether a corresponding relay is abnormal or not is judged according to a state judgment value, if yes, feedback is carried out through an instrument, and if not, the electric vehicle is powered on and runs normally.
As shown in fig. 5, the vehicle control unit sends the pre-charging control signal, and at this time, if the relay states are normal, Y1, Y2, and Y3 are Y1 ≠ 0, Y2 ≠ 0, and Y3 ═ 0, respectively. If Y1 is not equal to 0, the pre-charging relay K1 needs to be checked, the fact that the pre-charging relay K1 cannot be attracted is indicated, if Y2 is equal to 0, the fact that the air-conditioning relay K3 is adhered needs to be checked, if Y3 is not equal to 0, the fact that the main and negative relays K4 need to be checked, and the fact that the main and negative relays K4 cannot be attracted is indicated;
when the state of the relay is normal, Y1, Y2 and Y3 are Y1-0, Y2-0 and Y3-0 respectively. If Y1 ≠ 0, then need to investigate main positive relay K2, explain main positive relay K2 can't actuation, if Y2 ≠ 0, then need to investigate the air conditioner relay K3 adhesion condition, if Y3 ≠ 0, then need main negative relay K4, explain main negative relay K4 can't actuation.
3. When the vehicle runs, the vehicle control unit sends an air conditioner starting signal, judges whether the corresponding relay is abnormal or not according to the state judgment value, and feeds back the abnormal relay through the instrument if the abnormal relay is abnormal.
Because we only take out two ways of the motor and the air conditioner for explanation in order to simplify the principle, the structure of the motor is completely the same as that of the motor for one way of integration, only the selection types of the corresponding relay and the corresponding safety are different, the control principle of the motor is completely consistent with that of the motor, and the command is almost completely issued at the same time; for defrosting, heat dissipation and the like, the structure of the air conditioner is completely the same as that of the air conditioner, only the selection types of corresponding relays and fuses are different, the control principle of the relays and the fuses is completely consistent with that of the air conditioner, and the commands are issued almost completely at the same time.
As shown in fig. 6, when the vehicle is running, the driver needs to turn on the air conditioner, and after the air conditioner switch on the panel is pressed, the vehicle controller knows that the driver needs to turn on the air conditioner through the CAN and sends an air conditioner starting signal, at this time, if the relay state is normal, Y1, Y2, and Y3 are respectively Y1-0, Y2-0, and Y3-0. If Y1 is not equal to 0, the main positive relay K2 needs to be checked, the fact that the main positive relay K2 cannot be attracted is indicated, if Y2 is not equal to 0, the fact that the air conditioner relay K3 needs to be checked, the fact that the air conditioner relay K3 cannot be attracted is indicated, and if Y3 is not equal to 0, the fact that the main negative relay K4 needs to be checked, the fact that the main negative relay K4 cannot be attracted is indicated.
4. When the vehicle runs, the vehicle control unit removes the air conditioner starting signal, judges whether the corresponding relay is abnormal according to the state judgment value, and feeds back the signals through the instrument if the corresponding relay is abnormal.
As shown in fig. 7, when the driver needs to turn off the air conditioner and presses the air conditioner off switch on the panel, the vehicle controller knows that the driver needs to turn off the air conditioner through the CAN and releases the air conditioner start signal, at this time, if the relay state is normal, Y1, Y2, and Y3 are Y1 ═ 0, Y2 ≠ 0, and Y3 ═ 0, respectively. If Y1 is not equal to 0, checking a main positive relay K2 to indicate that the main positive relay K2 cannot be attracted, if Y2 is equal to 0, checking the adhesion condition of the air-conditioning relay K3, and if Y3 is not equal to 0, checking a main negative relay K4 to indicate that the main negative relay K4 cannot be attracted;
5. after the vehicle is driven, the vehicle control unit sends a control signal to disconnect the main positive relay K2, the air conditioner relay K3 and the main negative relay K4, judges whether the corresponding relays are abnormal or not according to the state judgment value, and feeds back the abnormal relays through the instrument if the abnormal relays are abnormal.
As shown in fig. 8, when the driver turns off the key, the vehicle controller issues control signals to turn off the main relay K2 and the air conditioner relay K3 in sequence, and at this time, if the relay states are normal, Y1, Y2 and Y3 are Y1 ≠ 0, Y2 ≠ 0, and Y3 ═ 0, respectively. If Y1 is equal to 0, then need to investigate main positive relay K2, explain that main positive relay K2 has the adhesion condition, if Y2 is equal to 0, then need to investigate air conditioner relay K3 adhesion condition, if Y3 is not equal to 0, then need to investigate main negative relay K4, explain that main negative relay K4 can't the actuation.
When no abnormal condition is sent out, the vehicle control unit sends out a control signal to disconnect the main and negative relays K4, and at the moment, if the relay state is normal, Y1, Y2 and Y3 are Y1 not equal to 0, Y2 not equal to 0 and Y3 not equal to 0 respectively. If Y1 is equal to 0, the main positive relay K2 is required, the adhesion condition of the main positive relay K2 is shown, if Y2 is equal to 0, the adhesion condition of the air conditioner relay K3 needs to be checked, if Y3 is equal to 0, the adhesion condition of the main negative relay K4 needs to be checked, and the adhesion condition of the main negative relay K4 is shown;
when no abnormal condition is generated, the instrument desk is powered off, the collection is terminated, then the motor and the like carry out active discharge, and the power-off is finished.
The invention is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
Claims (7)
1. The utility model provides an electric automobile high voltage distributor box relay monitored control system, includes: the system comprises a power supply unit, a high-voltage distribution box, a motor controller, a motor and an air conditioner, wherein the power supply unit is respectively connected with the motor controller and the air conditioner through the high-voltage distribution box; the high-voltage distribution box is characterized by further comprising a vehicle control unit, wherein a voltage detection module, a contactor controller, a power supply circuit and a signal circuit are arranged in the high-voltage distribution box;
the power supply unit is respectively connected with the motor controller and the air conditioner through a power supply circuit, and the voltage detection module is used for detecting the voltage of the front end and the rear end of the power supply circuit and sending voltage data to the vehicle control unit through a signal circuit; the vehicle control unit judges the relay state of the power supply circuit according to the voltage data and sends a control signal to the contactor controller through a signal circuit;
the contactor controller is used for controlling a relay in the power supply circuit according to a control signal sent by the vehicle control unit;
the power supply circuit includes: the system comprises a power supply unit Y, a pre-charging resistor R1, a motor controller U1, a motor U2, an air conditioner U3, a contactor controller U4, a motor fuse F1, an air conditioner fuse F2, a pre-charging relay K1, a main positive relay K2, an air conditioner relay K3 and a main negative relay K4;
the positive electrode of the power supply unit Y is respectively connected with one end of a pre-charging resistor R1, one end of a normally open contact K2-1 of a main positive relay K2 and one end of an air conditioner fuse F2, the other end of the pre-charging resistor R1 is connected with one end of a normally open contact K1-1 of a pre-charging relay K1, the other end of the normally open contact K1-1 of a pre-charging relay K1 is respectively connected with the other end of the normally open contact K2-1 of a main positive relay K2 and one end of a motor fuse F1, and the other end of the motor fuse F1 is connected with the positive input end of a motor controller U1; the other end of the air conditioner fuse F2 is connected with one end of a normally open contact K3-1 of an air conditioner relay K3, and the other end of the normally open contact K3-1 of the air conditioner relay K3 is connected with the positive input end of an air conditioner U3; the negative electrode of the power supply unit Y is connected with one end of a normally open contact K4-1 of a main negative relay K4, and the other end of the normally open contact K4-1 of the main negative relay K4 is connected with the negative input end of a motor controller U1 and the negative input end of an air conditioner U3 respectively; the output end of the motor controller U1 is connected with the input end of a motor U2; the first output end of the contactor controller U4 is grounded after being connected with a pre-charging relay K1 in series, the first output end of the contactor controller U4 is grounded after being connected with a main positive relay K2 in series, the third output end of the contactor controller U4 is grounded after being connected with an air-conditioning relay K3 in series, and the fourth output end of the contactor controller U4 is grounded after being connected with a main negative relay K4 in series;
the power supply circuit is also internally provided with a plurality of detection points for testing the front and rear end voltages by the voltage detection module;
the detection point includes: the device comprises a front-end detection point A, a first reference point B, a second reference point C, a rear-end No. 1 detection point D, a rear-end No. 2 detection point E and a rear-end No. 3 detection point F;
the front-end detection point A is arranged on a lead between the positive electrode of the power supply unit Y and one end of a normally open contact K2-1 of a main positive relay K2; the first reference point B is arranged on a lead between the negative electrode of the power supply unit Y and one end of a normally open contact K4-1 of the main negative relay K4; the second reference point C is arranged on a lead between the positive electrode of the power supply unit Y and one end of the pre-charging resistor R1; the rear end No. 1 detection point D is arranged on a lead between the other end of a normally open contact K2-1 of the main positive relay K2 and one end of a motor fuse F1; the rear end No. 2 detection point E is arranged on a lead between the other end of the normally open contact K3-1 of the air conditioner relay K3 and the positive input of the air conditioner U3; and the rear end No. 3 detection point F is arranged on a lead between the other end of the normally open contact K4-1 of the main negative relay K4 and the positive input end of the motor controller U1.
2. The electric vehicle high voltage distribution box relay monitoring system of claim 1, wherein the signal circuit comprises: the system comprises a voltage detection module, a contactor controller, a vehicle control unit and an instrument;
and the vehicle control unit is respectively in signal connection with the voltage detection module, the contactor controller and the instrument.
3. The electric vehicle high-voltage distribution box relay monitoring method based on the electric vehicle high-voltage distribution box relay monitoring system of claim 1 is characterized by comprising the following steps of:
the vehicle control unit sends a control signal to the contactor controller to control the relay of the power supply circuit to act;
the voltage detection module detects the front and rear end voltages of the power supply circuit and sends voltage data to the vehicle control unit through the signal circuit;
the vehicle control unit obtains a state judgment value of the relay by using a preset algorithm according to the voltage data;
and the vehicle control unit judges whether the corresponding relay is abnormal according to the control signal and the state judgment value, and if so, the vehicle control unit feeds back the corresponding relay through the instrument.
4. The method of claim 3, wherein the control signal comprises: a pre-charging control signal, a motor starting signal and an air conditioner starting signal;
the action of the pre-charging control signal control relay comprises the following steps: closing a normally open contact K1-1 of a pre-charging relay K1 and a normally open contact K4-1 of a main negative relay K4;
the action of the motor starting signal control relay comprises the following steps: after the pre-charging control signal is executed, firstly closing a normally open contact K2-1 of the main positive relay K2, and then opening a normally open contact K1-1 of the pre-charging relay K1;
the action of the air conditioner starting signal control relay comprises the following steps: and closing a normally open contact K3-1 of the air conditioner relay K3.
5. The method for monitoring the relay of the high-voltage distribution box of the electric automobile according to claim 4, wherein the front and back end voltages of the power supply circuit specifically comprise: the voltage value a of the front end detection point A, the voltage value B of the first reference point B, the voltage value C of the second reference point C, the voltage value D of the rear end No. 1 detection point D, the voltage value E of the rear end No. 2 detection point E and the voltage value F of the rear end No. 3 detection point F.
6. The method for monitoring the relay of the high-voltage distribution box of the electric automobile according to claim 5, wherein the step of obtaining the state judgment value of the relay by the vehicle control unit according to the voltage data by using a preset algorithm comprises the following steps:
setting a front end voltage value X1, a first rear end voltage value X2, a second rear end voltage value X3 and a third rear end voltage value X4, wherein X1 is a-b, X2 is d-b, X3 is e-b, and X4 is c-f;
setting a motor relay state judgment value Y1, an air conditioner relay state judgment value Y2 and a main and negative relay state judgment value Y3; wherein Y1-X1-X2, Y2-X1-X3, and Y3-X1-X4.
7. The method for monitoring the relay of the high-voltage distribution box of the electric automobile according to claim 6, wherein the step of judging whether the corresponding relay is abnormal or not by the vehicle controller according to the control signal and the state judgment value comprises the following steps: when the current control signal is the pre-charging control signal, if Y1 ═ 0, Y2 ≠ 0, and Y3 ═ 0, all relays are normal;
otherwise, if Y1 ≠ 0, the pre-charge relay K1 is abnormal, if Y2 ≠ 0, the air-conditioning relay K3 is abnormal, and if Y3 ≠ 0, the main-negative relay K4 is abnormal;
when the current control signal is a motor starting signal, if Y1 is equal to 0, Y2 is not equal to 0, and Y3 is equal to 0, all relays are normal;
otherwise, if Y1 ≠ 0, the main positive relay K2 is abnormal, if Y2 ≠ 0, the air-conditioning relay K3 is abnormal, and if Y3 ≠ 0, the main negative relay K4 is abnormal;
when the current control signal is an air conditioner starting signal, if Y1 is equal to 0, Y2 is equal to 0 and Y3 is equal to 0, all relays are normal;
otherwise, if Y1 ≠ 0, the main positive relay K2 is abnormal, if Y2 ≠ 0, the air-conditioning relay K3 is abnormal, and if Y3 ≠ 0, the main negative relay K4 is abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375211.9A CN111483320B (en) | 2020-05-07 | 2020-05-07 | Electric automobile high-voltage distribution box relay monitoring system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375211.9A CN111483320B (en) | 2020-05-07 | 2020-05-07 | Electric automobile high-voltage distribution box relay monitoring system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111483320A CN111483320A (en) | 2020-08-04 |
| CN111483320B true CN111483320B (en) | 2021-10-26 |
Family
ID=71792789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010375211.9A Active CN111483320B (en) | 2020-05-07 | 2020-05-07 | Electric automobile high-voltage distribution box relay monitoring system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111483320B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107458234B (en) * | 2017-08-14 | 2022-11-22 | 中车永济电机有限公司 | High-voltage distribution box of rubber-tyred trolley bus |
| CN117227483B (en) * | 2023-11-15 | 2024-02-09 | 珠海格力电器股份有限公司 | Control method and device for pure electric vehicle, pure electric vehicle and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017093008A (en) * | 2015-11-02 | 2017-05-25 | 三菱自動車工業株式会社 | Contactor failure determination device and contactor failure determination method |
| CN107089144A (en) * | 2017-05-22 | 2017-08-25 | 德清真牛新能源科技有限公司 | Feedback high voltage connector adhesion fault inspection system that electric automobile is contactless and control inspection method |
| CN207955350U (en) * | 2017-12-22 | 2018-10-12 | 珠海银隆电器有限公司 | Power cell of vehicle system high voltage distribution installation and power cell of vehicle system |
| CN108657088A (en) * | 2017-04-01 | 2018-10-16 | 上海蔚来汽车有限公司 | For the high voltage distribution box of electric vehicle, electric control system and electric vehicle |
| CN108790829A (en) * | 2018-07-23 | 2018-11-13 | 四川江淮汽车有限公司 | A kind of high voltage loop of electric automobile Detection & Controling circuit and detection method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5024811B2 (en) * | 2006-03-17 | 2012-09-12 | 国立大学法人静岡大学 | Electric vehicle power supply device |
| CN103419643B (en) * | 2013-07-26 | 2016-02-10 | 航天新长征电动汽车技术有限公司 | A kind of high voltage power distribution control method and device thereof |
-
2020
- 2020-05-07 CN CN202010375211.9A patent/CN111483320B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017093008A (en) * | 2015-11-02 | 2017-05-25 | 三菱自動車工業株式会社 | Contactor failure determination device and contactor failure determination method |
| CN108657088A (en) * | 2017-04-01 | 2018-10-16 | 上海蔚来汽车有限公司 | For the high voltage distribution box of electric vehicle, electric control system and electric vehicle |
| CN107089144A (en) * | 2017-05-22 | 2017-08-25 | 德清真牛新能源科技有限公司 | Feedback high voltage connector adhesion fault inspection system that electric automobile is contactless and control inspection method |
| CN207955350U (en) * | 2017-12-22 | 2018-10-12 | 珠海银隆电器有限公司 | Power cell of vehicle system high voltage distribution installation and power cell of vehicle system |
| CN108790829A (en) * | 2018-07-23 | 2018-11-13 | 四川江淮汽车有限公司 | A kind of high voltage loop of electric automobile Detection & Controling circuit and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111483320A (en) | 2020-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4510753B2 (en) | Power supply device and control method thereof | |
| CN102175971B (en) | Relay state detection method and device of electric vehicle high-voltage system | |
| CN102004222B (en) | Method and device for monitoring state of relay in vehicle-mounted battery management system | |
| CN203198756U (en) | Monitoring and alarm device for electric car high-tension distribution system | |
| CN111483320B (en) | Electric automobile high-voltage distribution box relay monitoring system and method | |
| CN109823285A (en) | Electric system, power-on and power-off control method and control system above and below electric automobile high-voltage | |
| CN111638448A (en) | Contactor fault detection device and method and vehicle | |
| CN115091957A (en) | Device and method for diagnosing contact state of high-voltage upper and lower electric contactors and vehicle | |
| CN107284246A (en) | A kind of electric automobile main contactor failure detector | |
| CN105843216B (en) | A kind of off-line test method and system of new energy vehicle | |
| CN109878334A (en) | A kind of dual pressure controller | |
| CN110723030A (en) | Pre-charging starting circuit and method for DCDC converter for fuel cell vehicle | |
| CN210706923U (en) | Sanitation vehicle | |
| CN207128639U (en) | A kind of electric automobile main contactor failure detector | |
| CN113147405B (en) | Automatic high-voltage recovery power-on control method for electric automobile | |
| CN113533926B (en) | Battery system charging circuit and fault detection method and device thereof | |
| CN114460405A (en) | New energy whole vehicle insulation fault troubleshooting system based on UDS protocol | |
| CN112046421B (en) | Power-on control device and method of all-in-one controller and automobile | |
| CN114043873A (en) | High-voltage relay monitoring method, device, equipment and storage medium | |
| CN106571619A (en) | Storage battery undervoltage protection control circuit and control method thereof | |
| CN208760573U (en) | A kind of vehicle electric frost removal control system and car | |
| CN113544521A (en) | Relay working state detection system, device and method and reverse connection detection method | |
| CN117227483B (en) | Control method and device for pure electric vehicle, pure electric vehicle and storage medium | |
| CN213423321U (en) | Automatic testing arrangement of battery system high-voltage box | |
| CN113752907B (en) | Fault detection method for heating loop of battery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |