CN109709479A - Contactor adhesion detection circuit and contactor adhesion detection method - Google Patents
Contactor adhesion detection circuit and contactor adhesion detection method Download PDFInfo
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- CN109709479A CN109709479A CN201811643726.1A CN201811643726A CN109709479A CN 109709479 A CN109709479 A CN 109709479A CN 201811643726 A CN201811643726 A CN 201811643726A CN 109709479 A CN109709479 A CN 109709479A
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Abstract
The embodiment of the invention discloses a kind of contactor adhesion detection circuit and contactor adhesion detection methods.Wherein, contactor adhesion detection circuit includes electric machine controller, detection circuit, the first sample circuit, multiple second sample circuits, the first controllable switch and the second controllable switch.Detection circuit is connect with electric machine controller, the first sample circuit and multiple second sample circuits respectively, and the first sample circuit is connect with first contactor, and multiple second sample circuit one-to-one correspondence are connect with multiple second contactors；First controllable switch is connect with the first sample circuit and electric machine controller respectively；Second controllable switch is connect with multiple second sample circuits and electric machine controller respectively.When the first controllable switch and the second controllable switch disconnect, detection circuit can not receive adhesion detection signal in off working state, reduce the power consumption of detection circuit；Meanwhile also can avoid detection circuit and being damaged by the interference of high voltage power distribution circuit, improve the service life of detection circuit.
Description
Technical field
The present invention relates to detection technique field more particularly to a kind of contactor adhesion detection circuits and contactor adhesion to detect
Method.
Background technique
The contactor of most domestic electric car mesohigh distribution is more and more at present, and people examine the adhesion of contactor
Survey is also increasingly paid attention to.In order to improve the safety in production activity, before upper high-voltage electricity, the contact to high voltage power distribution is needed
Device carries out corresponding adhesion detection to judge whether contactor is in adhesion state, with prevent when contactor sticks together also into
Row, which is powered on or repair etc., to be operated, and the further loss of product is caused.
In the prior art, it in order to detect the adhesion state of contactor, is connect by detection circuit with contactor to obtain and connect
The adhesion status signal of tentaculum, and the adhesion status signal that will acquire is sent to electric machine controller.However in the prior art,
Detection circuit connect with the electric automobile high-voltage power distribution circuit (i.e. contactor) of vehicle for a long time and is chronically at working condition, a side
Face increases the power consumption of detection circuit；On the other hand, since the operating condition of vehicle high voltage power distribution is especially complex, detection circuit and vehicle
A possibility that electric automobile high-voltage power distribution circuit conflicts each other is especially big, and detection circuit is caused easily to be done by the high-tension circuit of vehicle
It disturbs and damages.
Summary of the invention
The embodiment of the present invention is the technical problem to be solved is that the power consumption for how reducing detection circuit and avoids detection electricity
It is interfered and damages by electric automobile high-voltage power distribution circuit in road.
To solve the above-mentioned problems, in a first aspect, the embodiment of the present invention proposes a kind of contactor adhesion detection circuit, application
In electric automobile high-voltage power distribution circuit, the electric automobile high-voltage power distribution circuit include two power supply buses, first contactor with
And multiple second contactors, the first contactor are set on the power supply buses, the second contactor is connected to described in two
Between power supply buses, the contactor adhesion detection circuit includes electric machine controller, detection circuit, the first sample circuit and more
A second sample circuit, the detection circuit respectively with the electric machine controller, first sample circuit and multiple described
The connection of second sample circuit, first sample circuit connect with the first contactor, multiple second sample circuits and
Multiple second contactors connect one to one, wherein the contactor adhesion detection circuit further include:
First controllable switch, first controllable switch respectively with first sample circuit and the electric machine controller
It connects and is controlled by the electric machine controller；And
Second controllable switch, second controllable switch respectively with multiple second sample circuits and the motor control
Device processed connects and is controlled by the electric machine controller；
Wherein, when first controllable switch is connected, first sample circuit examines the adhesion of the first contactor
It surveys signal and is sent to the detection circuit；When second controllable switch is connected, each second sample circuit is respectively by each institute
The adhesion detection signal for stating second contactor is sent to the detection circuit.
Its further technical solution is, first controllable switch includes input, output end and control terminal, described
The input terminal of first controllable switch is connect with one end of first sample circuit, the output end of first controllable switch and institute
State the power supply buses connection of electric automobile high-voltage power distribution circuit, the control terminal and the motor control of first controllable switch
Device connection, the other end of first sample circuit are connect with another power supply buses of the electric automobile high-voltage power distribution circuit.
Its further technical solution is, second controllable switch includes input, output end and control terminal, described
The input terminal of second controllable switch is connect with one end of each second sample circuit respectively, the output of second controllable switch
End is connect with a power supply buses of the electric automobile high-voltage power distribution circuit, the control terminal of second controllable switch and the electricity
Machine controller connection, the other end of each second sample circuit pass through each second contactor and the electric car respectively
Another power supply buses of high voltage power distribution circuit connect.
Its further technical solution is that first sample circuit includes the first divider resistance and the second partial pressure electricity
Resistance, first divider resistance and second divider resistance are connected in series, and the detection circuit is connected to first partial pressure
The connecting node of resistance and second divider resistance；Second sample circuit includes third divider resistance and the 4th partial pressure
Resistance, the third divider resistance and the 4th divider resistance are connected in series, and the detection circuit is connected to the third point
The connecting node of piezoresistance and the 4th divider resistance.
Its further technical solution is that the contactor adhesion detection circuit further includes the first accessory power supply, described
One controllable switch includes input, output end and control terminal, and the input terminal of first controllable switch and described first assist
Power supply connection, the output end of first controllable switch are connect with first sample circuit, the control of first controllable switch
End processed is connect with the electric machine controller.
Its further technical solution is, first sample circuit include the first current-limiting resistance, the first isolating device with
And first diode, one end of first current-limiting resistance are connect with the output end of first controllable switch, first limit
The other end of leakage resistance is connect with an input terminal of first isolating device, another input terminal of first isolating device with
The anode connection of the first diode, the output end of first isolating device are connect with the detection circuit, and described first
The cathode of diode is connect with the first contactor.
Its further technical solution is that the contactor adhesion detection circuit further includes the second accessory power supply, described
Two controllable switches include input, output end and control terminal, the input terminal of second controllable switch respectively with it is multiple described
Second sample circuit connection, second controllable switch output end ground connection, the control terminal of second controllable switch with it is described
Electric machine controller connection, second accessory power supply are connect with each second contactor respectively.
Its further technical solution is, second sample circuit include the second current-limiting resistance, the second isolating device with
And second diode, the anode of second diode are connect with the second contactor, the cathode of second diode and
One end of second current-limiting resistance connects, an input of the other end of second current-limiting resistance and second isolating device
End connection, another input terminal of second isolating device connect with the input terminal of second controllable switch, described second every
It is connect from the output end of device with the detection circuit.
Its further technical solution is that first controllable switch is relay or metal-oxide-semiconductor；Described second controllably opens
Close is relay or metal-oxide-semiconductor.
Second aspect, the present invention propose that a kind of contactor adhesion detection method, the method are applied to such as first aspect institute
In the contactor adhesion detection circuit stated, which comprises
If receiving the detection instruction of entire car controller transmission, electric machine controller is respectively to the first controllable switch and second
Controllable switch sends first control signal so that first controllable switch and second controllable switch conducting；
The adhesion detection signal for the first contactor that electric machine controller receiving test circuit is sent and each second contactor
Adhesion detect signal；
Electric machine controller detects signal according to the adhesion of the first contactor and judges whether the first contactor is in
Adhesion state detects signal to obtain the adhesion testing result of first contactor, and according to the adhesion of each second contactor
Judge whether each second contactor is in adhesion state to obtain the adhesion testing result of each second contactor；
Electric machine controller examines the adhesion of the adhesion testing result of the first contactor and each second contactor
It surveys result and is sent to entire car controller；
Electric machine controller sends second control signal to first controllable switch and second controllable switch respectively
So that first controllable switch and second controllable switch disconnect.
By the technical solution of the application embodiment of the present invention, detection first contactor and each second contactor are not being needed
Adhesion state when, the first controllable switch and the second controllable switch are controlled by electric machine controller and disconnected, as a result, detection circuit
The adhesion detection signal that the first sample circuit and each second sample circuit are sent can not be received, detection circuit is in inoperative
State reduces the power consumption of detection circuit；On the other hand, it also can avoid detection circuit to be damaged by the interference of high voltage power distribution circuit
It is bad, improve the service life of detection circuit.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic block diagram for contactor adhesion detection circuit that the embodiment of the present invention proposes；
Fig. 2 is a kind of circuit diagram for contactor adhesion detection circuit that the embodiment of the present invention proposes；
Fig. 3 is a kind of circuit diagram for contactor adhesion detection circuit that another embodiment of the present invention proposes；And Fig. 4 is this
A kind of contactor adhesion detection method schematic flow diagram that inventive embodiments propose.
Appended drawing reference
Entire car controller 10；Electric machine controller 20；Detection circuit 30；First sample circuit 40；Second sample circuit 50；The
One controllable switch 60；Second controllable switch 70；By electric unit 80；First isolating device 90 and the second isolating device 100；First
Contactor K1；Second contactor K2；Positive power supply buses HV+；Negative power supply buses HV-；First divider resistance R1；Second divider resistance
R2；Third divider resistance R3；4th divider resistance R4；First accessory power supply Vcc1；Second accessory power supply Vcc2；First current limliting electricity
Hinder R5；First diode D1；Second current-limiting resistance R6；Second diode D2.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states, similar reference numerals represent similar component in attached drawing.Obviously, will be described below embodiment is only the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that in this embodiment of the present invention term used in the description merely for the sake of description particular implementation
Example purpose and be not intended to limit the embodiment of the present invention.Such as the institute in specification and appended book of the embodiment of the present invention
As use, other situations unless the context is clearly specified, otherwise " one " of singular, "one" and "the" are intended to wrap
Include plural form.
Referring to Fig. 1, the embodiment of the present invention proposes a kind of contactor adhesion detection circuit 30, the contactor adhesion detection circuit
30 are applied in electric automobile high-voltage power distribution circuit.
Electric automobile high-voltage power distribution circuit include two power supply buses (two power supply buses be positive respectively power supply buses HV+ with
And negative power supply buses HV-), first contactor K1 and multiple second contactor K2.First contactor K1 is set on power supply buses,
Specifically, first contactor K1 is arranged on negative power supply buses HV-, or in other embodiments, first contactor K1 can also
It is arranged on positive power supply buses HV+.Second contactor K2 is connected between two power supply buses, specifically, second contactor K2 with
It is connected in series between two power supply buses by electric unit 80, is converted mould by electric unit 80 for main control module, the DC-DC of electric car
Block or DC-AC conversion module, the present invention are not especially limited this.
Contactor adhesion detection circuit 30 proposed by the present invention includes entire car controller 10, electric machine controller 20, detection electricity
Road 30, the first sample circuit 40, multiple second sample circuits 50, the first controllable switch 60 and the second controllable switch 70.Vehicle
Controller 10 is connect with electric machine controller 20, detection circuit 30 respectively with electric machine controller 20, the first sample circuit 40 and more
A second sample circuit 50 connects, and the first sample circuit 40 is connect with first contactor K1, multiple second sample circuits 50 and more
A second contactor K2 connects one to one；First controllable switch 60 respectively with the first sample circuit 40 and electric machine controller 20
It connects and is controlled by electric machine controller 20；Second controllable switch 70 respectively with multiple second sample circuits 50 and electric machine controller
20 connect and are controlled by electric machine controller 20.
It should be noted that the first controllable switch 60 can be the switching-type devices such as relay or metal-oxide-semiconductor.Second controllably opens
Closing 70 can be the switching-type devices such as relay or metal-oxide-semiconductor.
It should be further noted that the specific structure of detection circuit 30 can be known by existing related data, the present invention
It is not specifically limited in this embodiment.
In the present invention, when needing to detect the adhesion state of first contactor K1 and each second contactor K2, pass through
Electric machine controller 20 controls the first controllable switch 60 and the conducting of the second controllable switch 70, when the first controllable switch 60 is connected, institute
It states the first sample circuit 40 and the adhesion detection signal of the first contactor K1 is sent to the detection circuit 30；Described second
When controllable switch 70 is connected, each second sample circuit 50 is respectively by the adhesion detection signal hair of each second contactor K2
Give the detection circuit 30.When not needing the adhesion state of detection first contactor K1 and each second contactor K2, lead to
It crosses electric machine controller 20 and controls the first controllable switch 60 and the disconnection of the second controllable switch 70, detection circuit 30 can not connect as a result,
The adhesion detection signal that the first sample circuit 40 and each second sample circuit 50 are sent is received, detection circuit 30 is in inoperative
State reduces the power consumption of detection circuit 30；On the other hand, also can avoid detection circuit 30 by high voltage power distribution circuit interference and
Damage, improves the service life of detection circuit 30.
Referring to Fig. 1 and Fig. 2 is combined, in some embodiments, such as the present embodiment, first controllable switch 60 includes defeated
Enter end, output end and control terminal, one end company of the input terminal of first controllable switch 60 and first sample circuit 40
It connects, a power supply buses of the output end of first controllable switch 60 and the electric automobile high-voltage power distribution circuit are (in this implementation
Be negative power supply buses HV- in example, or in other embodiments, and the output end of the first controllable switch 60 and the electric car are high
Press the positive power supply buses HV+ connection of power distribution circuit) connection, the control terminal of first controllable switch 60 and the electric machine controller
20 connections, the other end of first sample circuit 40 and the electric automobile high-voltage power distribution circuit another power supply buses (
Be positive power supply buses HV+ in the present embodiment, or in other embodiments, the other end of the first sample circuit 40 with it is described electronic
The negative power supply buses HV- connection of automobile high voltage power distribution circuit) connection.
First sample circuit 40 includes the first divider resistance R1 and the second divider resistance R2, the first partial pressure electricity
It hinders R1 and the second divider resistance R2 to be connected in series, the detection circuit 30 is connected to the first divider resistance R1 and described second
The connecting node of divider resistance R2.
Further, second controllable switch 70 includes input, output end and control terminal, and described second controllably opens
Close 70 input terminal connect respectively with one end of each second sample circuit 50, the output end of second controllable switch 70 and
(be negative one power supply buses of the electric automobile high-voltage power distribution circuit power supply buses HV- in the present embodiment, or in other realities
Apply in example, the output end of the second controllable switch 70 is connect with the positive power supply buses HV+ of the electric automobile high-voltage power distribution circuit) even
It connects, the other end of each second sample circuit 50 is matched by each second contactor K2 with the electric automobile high-voltage respectively
Circuit another power supply buses (be positive power supply buses HV+ in the present embodiment, or in other embodiments, each described
The other end of two sample circuits 50 passes through the negative of each second contactor K2 and the electric automobile high-voltage power distribution circuit respectively
Power supply buses HV- connection) connection.
Second sample circuit 50 includes third divider resistance R3 and the 4th divider resistance R4, the third partial pressure electricity
It hinders R3 and the 4th divider resistance R4 to be connected in series, the detection circuit 30 is connected to the third divider resistance R3 and the described 4th
The connecting node of divider resistance R4.
Referring to Fig. 1 and Fig. 3 is combined, the contactor adhesion detection circuit 30 further includes the first accessory power supply Vcc1.It is described
First controllable switch 60 includes input, output end and control terminal.The input terminal of first controllable switch 60 and described the
One accessory power supply Vcc1 connection, the output end of first controllable switch 60 are connect with first sample circuit 40, and described
The control terminal of one controllable switch 60 is connect with the electric machine controller 20.
First sample circuit 40 includes the first current-limiting resistance R5, the first isolating device 90 and first diode D1.
One end of the first current-limiting resistance R5 is connect with the output end of first controllable switch 60, the first current-limiting resistance R5's
The other end is connect with an input terminal of first isolating device 90, another input terminal of first isolating device 90 with it is described
The anode connection of first diode D1, the output end of first isolating device 90 connect with the detection circuit 30, and described the
The cathode of one diode D1 is connect with the first contactor K1.
Further, the contactor adhesion detection circuit 30 further includes the second accessory power supply Vcc2.Described second is controllable
Switch 70 includes input, output end and control terminal.The input terminal of second controllable switch 70 is adopted with multiple second respectively
Sample circuit 50 connects, the output end of second controllable switch 70 ground connection, the control terminal of second controllable switch 70 with it is described
Electric machine controller 20 connects, and the second accessory power supply Vcc2 is connect with each second contactor K2 respectively.
Second sample circuit 50 includes the second current-limiting resistance R6, the second isolating device 100 and the second diode D2.
The anode of the second diode D2 is connect with the second contactor K2, the cathode and described second of the second diode D2
One end of current-limiting resistance R6 connects, an input of the other end and second isolating device 100 of the second current-limiting resistance R6
End connection, another input terminal of second isolating device 100 connect with the input terminal of second controllable switch 70, and described the
The output end of two isolating devices 100 is connect with the detection circuit 30.
It should be noted that the first isolating device 90 can be the isolating devices such as photoelectrical coupler or isolating transformer.The
Two isolating devices 100 can be the isolating devices such as photoelectrical coupler or isolating transformer.
Referring to fig. 4, the embodiment of the present invention also proposes that a kind of contactor adhesion detection method, the method are applied to as more than
In the contactor adhesion detection circuit that embodiment proposes, described method includes following steps S1-S5.
S1, if receiving the detection instruction of entire car controller transmission, electric machine controller respectively to the first controllable switch and
Second controllable switch sends first control signal so that first controllable switch and second controllable switch conducting.
In specific implementation, if receiving the detection instruction of entire car controller transmission, electric machine controller respectively can to first
Control switch and the second controllable switch send first control signal so that first controllable switch and described second controllable
Switch conduction.
S2, the adhesion detection signal for the first contactor that electric machine controller receiving test circuit is sent and each second contact
The adhesion of device detects signal.
In specific implementation, in the conducting of the first controllable switch, the first sample circuit examines the adhesion of the first contactor
It surveys signal and is sent to the detection circuit, detection circuit is sent to electricity after converting the adhesion detection signal isolation of first contactor
Machine controller.When second controllable switch is connected, each second sample circuit is respectively by the adhesion detection signal hair of each second contactor
Detection circuit is given, detection circuit is sent to motor control after by the adhesion of each second contactor detection signal isolation transformation
Device.
S3, electric machine controller detect signal according to the adhesion of the first contactor and judge whether the first contactor is located
In adhesion state to obtain the adhesion testing result of first contactor, and is detected and believed according to the adhesion of each second contactor
Number judge whether each second contactor is in adhesion state to obtain the adhesion testing result of each second contactor.
In specific implementation, electric machine controller detects signal according to the adhesion of the first contactor and judges first contact
Whether device is in adhesion state to obtain the adhesion testing result of first contactor, and according to the viscous of each second contactor
Even detection signal judges whether each second contactor is in adhesion state to obtain the adhesion testing result of second contactor.
Adhesion testing result includes adhesion and non-adhesion.
Specifically, adhesion detection signal is voltage sampling signal, and electric machine controller is detected according to the adhesion of first contactor
Signal determines the output voltage size when not turning on of first contactor；If the output electricity when not turning on of first contactor
Pressure is greater than 0, then the adhesion of first contactor is determined, otherwise, it is determined that the non-adhesion of first contactor.Electric machine controller connects according to second
The adhesion detection signal of tentaculum determines the output voltage size when not turning on of second contactor；If second contactor not
Output voltage when conducting is greater than 0, then the adhesion of second contactor is determined, otherwise, it is determined that the non-adhesion of second contactor.
S4, electric machine controller is by the adhesion of the adhesion testing result of the first contactor and each second contactor
Testing result is sent to entire car controller.
In specific implementation, electric machine controller contacts the adhesion testing result of the first contactor and each described second
The adhesion testing result of device is sent to entire car controller.
S5, electric machine controller send the second control letter to first controllable switch and second controllable switch respectively
Number so that first controllable switch and second controllable switch disconnect.
In specific implementation, electric machine controller sends the to first controllable switch and second controllable switch respectively
Two control signals are so that first controllable switch and second controllable switch disconnect, and detection circuit can not receive as a result,
The adhesion sent to the first sample circuit and each second sample circuit detects signal, and detection circuit is in off working state, drops
The power consumption of low detection circuit；On the other hand, it also can avoid interference of the detection circuit by high voltage power distribution circuit, improve detection electricity
The service life on road.
It should be noted that the method that above embodiments propose can be by configuring corresponding software journey in electric machine controller
Sequence is come what is realized, and specifically software layout method is well known to those skilled in the art, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in some embodiment
Part, reference can be made to the related descriptions of other embodiments.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, the even these modifications and changes of the present invention range that belongs to the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
The above is a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, any ripe
It knows those skilled in the art in the technical scope disclosed by the present invention, various equivalent modifications can be readily occurred in or replaces
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of contactor adhesion detection circuit is applied in electric automobile high-voltage power distribution circuit, the electric automobile high-voltage is matched
Circuit includes two power supply buses, first contactor and multiple second contactors, and the first contactor is set to the power supply
On bus, the second contactor is connected between two power supply buses, and the contactor adhesion detection circuit includes motor
Controller, detection circuit, the first sample circuit and multiple second sample circuits, the detection circuit respectively with the motor control
Device, first sample circuit and multiple second sample circuit connections processed, first sample circuit and described first
Contactor connection, multiple second sample circuits connect one to one with multiple second contactors, which is characterized in that institute
State contactor adhesion detection circuit further include:
First controllable switch, first controllable switch are connect with first sample circuit and the electric machine controller respectively
And it is controlled by the electric machine controller；And
Second controllable switch, second controllable switch respectively with multiple second sample circuits and the electric machine controller
It connects and is controlled by the electric machine controller；
Wherein, when first controllable switch is connected, the adhesion of the first contactor is detected letter by first sample circuit
Number it is sent to the detection circuit；When second controllable switch is connected, each second sample circuit is respectively by each described the
The adhesion detection signal of two contactors is sent to the detection circuit.
2. contactor adhesion detection circuit according to claim 1, which is characterized in that first controllable switch includes defeated
Enter end, output end and control terminal, the input terminal of first controllable switch is connect with one end of first sample circuit, institute
The output end for stating the first controllable switch is connect with a power supply buses of the electric automobile high-voltage power distribution circuit, and described first is controllable
The control terminal of switch is connect with the electric machine controller, and the other end and the electric automobile high-voltage of first sample circuit are matched
Another power supply buses of circuit connect.
3. contactor adhesion detection circuit according to claim 2, which is characterized in that second controllable switch includes defeated
Enter end, output end and control terminal, the input terminal of second controllable switch one end with each second sample circuit respectively
Connection, the output end of second controllable switch is connect with a power supply buses of the electric automobile high-voltage power distribution circuit, described
The control terminal of second controllable switch is connect with the electric machine controller, and the other end of each second sample circuit passes through respectively respectively
The second contactor is connect with another power supply buses of the electric automobile high-voltage power distribution circuit.
4. contactor adhesion detection circuit according to claim 3, which is characterized in that first sample circuit includes the
One divider resistance and the second divider resistance, first divider resistance and second divider resistance are connected in series, the inspection
Slowdown monitoring circuit is connected to the connecting node of first divider resistance Yu second divider resistance；Second sample circuit includes
Third divider resistance and the 4th divider resistance, the third divider resistance and the 4th divider resistance are connected in series, described
Detection circuit is connected to the connecting node of the third divider resistance Yu the 4th divider resistance.
5. contactor adhesion detection circuit according to claim 1, which is characterized in that the contactor adhesion detection circuit
It further include the first accessory power supply, first controllable switch includes input, output end and control terminal, and described first controllably opens
The input terminal of pass is connect with first accessory power supply, and the output end of first controllable switch and first sample circuit connect
It connects, the control terminal of first controllable switch is connect with the electric machine controller.
6. contactor adhesion detection circuit according to claim 5, which is characterized in that first sample circuit includes the
It is controllably opened with described first one end of one current-limiting resistance, the first isolating device and first diode, first current-limiting resistance
The output end of pass connects, and the other end of first current-limiting resistance is connect with an input terminal of first isolating device, described
The anode of another input terminal of first isolating device and the first diode connect, the output end of first isolating device and
The detection circuit connection, the cathode of the first diode are connect with the first contactor.
7. contactor adhesion detection circuit according to claim 1, which is characterized in that the contactor adhesion detection circuit
It further include the second accessory power supply, second controllable switch includes input, output end and control terminal, and described second controllably opens
The input terminal of pass is connect with multiple second sample circuits respectively, the output end of second controllable switch ground connection, and described the
The control terminal of two controllable switches is connect with the electric machine controller, second accessory power supply respectively with each second contactor
Connection.
8. contactor adhesion detection circuit according to claim 7, which is characterized in that second sample circuit includes the
Two current-limiting resistances, the second isolating device and the second diode, anode and the second contactor of second diode connect
It connects, the cathode of second diode is connect with one end of second current-limiting resistance, the other end of second current-limiting resistance
It is connect with an input terminal of second isolating device, another input terminal of second isolating device is controllably opened with described second
The input terminal of pass connects, and the output end of second isolating device is connect with the detection circuit.
9. contactor adhesion detection circuit according to claim 1-8, which is characterized in that described first controllably opens
Close is relay or metal-oxide-semiconductor；Second controllable switch is relay or metal-oxide-semiconductor.
10. a kind of contactor adhesion detection method, which is characterized in that the method is applied to such as any one of claim 1-9 institute
In the contactor adhesion detection circuit stated, which comprises
If receiving the detection instruction of entire car controller transmission, electric machine controller is controllable to the first controllable switch and second respectively
Switch sends first control signal so that first controllable switch and second controllable switch conducting；
The adhesion detection signal for the first contactor that electric machine controller receiving test circuit is sent and gluing for each second contactor
Even detection signal；
Electric machine controller detects signal according to the adhesion of the first contactor and judges whether the first contactor is in adhesion
State detects signal judgement to obtain the adhesion testing result of first contactor, and according to the adhesion of each second contactor
Whether each second contactor is in adhesion state to obtain the adhesion testing result of each second contactor；
The adhesion of the adhesion testing result of the first contactor and each second contactor is detected knot by electric machine controller
Fruit is sent to entire car controller；
Electric machine controller send second control signal to first controllable switch and second controllable switch respectively so that
First controllable switch and second controllable switch disconnect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811643726.1A CN109709479B (en) | 2018-12-29 | 2018-12-29 | Contactor adhesion detection circuit and contactor adhesion detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811643726.1A CN109709479B (en) | 2018-12-29 | 2018-12-29 | Contactor adhesion detection circuit and contactor adhesion detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109709479A true CN109709479A (en) | 2019-05-03 |
| CN109709479B CN109709479B (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811643726.1A Active CN109709479B (en) | 2018-12-29 | 2018-12-29 | Contactor adhesion detection circuit and contactor adhesion detection method |
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| CN109709479B (en) | 2022-01-28 |
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