CN109324284A - The sintering detection method and its sintering detection system of relay in discharge loop - Google Patents
The sintering detection method and its sintering detection system of relay in discharge loop Download PDFInfo
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- CN109324284A CN109324284A CN201710641238.6A CN201710641238A CN109324284A CN 109324284 A CN109324284 A CN 109324284A CN 201710641238 A CN201710641238 A CN 201710641238A CN 109324284 A CN109324284 A CN 109324284A
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- sintering
- relay
- optocoupler
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
The invention discloses a kind of sintering detection method of the relay in discharge loop and its sintering detection systems, the sintering detection system of relay includes relay sintering detection circuit, discharge loop includes master switch, relay, load in series, relay sintering detection circuit includes sintering processes module and sintering optocoupler, the one end for being sintered the photophore of optocoupler is connect with the first power supply, the connection of one end of the other end and relay, the other end of relay is grounded, the one end for being sintered the light-receiving device of optocoupler is connect with sintering processes module, also it is connect with second source, other end ground connection, method includes: disconnection relay, it is closed master switch, the current potential V2 of the light-receiving device of sintering processes module detection sintering optocoupler；The signal whether being sintered according to V2 output relay.It can be improved reliability, the accuracy of detection in this way.
Description
Technical field
The present invention relates to power electronics field, in particular to the sintering detection method of the relay in discharge loop and
It is sintered detection system.
Background technique
Relay is the component of the high tension loops such as electric car, hybrid vehicle control, for controlling high tension loop
Connection and cutting.Electric vehicle high voltage direct current relay requires compact-sized, compact, since DC current connects and cuts off
Arc extinguishing is difficult, and will appear high current in use leads to relay contact sintering phenomenon, if relay sintering can not have
Effect detection and judgement, can make vehicle high-tension circuit without the heavy current impact of preliminary filling, lead to the sintering of other relays, fuse melting,
Vehicle can not start, travel.To solve this problem, relay sintering detection apparatus has been imported, has been preceding to main in vehicle starting
Crucial relay is sintered detection, if there is relay sintering then can not normally start, needs to exclude relay sintering failure
After could vehicle starting.
It is existing that application No. is a kind of " the contactor in high-voltage discharge control circuit sintering of the patent of invention of CN201010616133
The variation of the pre-charging capacitor voltage detected according to detection method " testing principle judges positive and negative anodes contactor in discharge loop
Whether it is sintered.The technology can only detect the relay sintering in the circuit with pre-charging capacitor, have limitation.And since detection is former
Reason discharges the influence waited more slowly vulnerable to other factors such as capacitor to judge that capacitor pressure difference changes, and showing for wrong report sintering occurs
As wrong report, which will lead to vehicle, to be started, and the sintering failure for excluding wrong report is spent human and material resources, and need logical high pressure that could detect burning
Knot, if relay has been sintered and has reported by mistake, energization, which may result in battery pack relay, to be occurred being sintered without preliminary filling, and there are risks.
How it is more acurrate reliably detect relay be sintered into urgent problem to be solved.
Summary of the invention
The present invention proposes the sintering detection method and sintering detection system of the relay in a kind of discharge loop, can be effective
The interference of disconnecting relay sintering detection, improves reliability, the accuracy of detection.
The sintering detection method for the relay in discharge loop that embodiment proposes according to an aspect of the present invention, the method
For the sintering detection system of the relay in discharge loop, being sintered detection system includes discharge loop and relay sintering detection
Circuit, discharge loop include master switch, relay, load, and it includes sintering processes module and sintering that relay, which is sintered detection circuit,
Optocoupler, the one end for being sintered the photophore of optocoupler connect with the first power supply, is sintered the other end and relay of the photophore of optocoupler
One end connection, the other end ground connection of relay, the one end for being sintered the light-receiving device of optocoupler are connect with sintering processes module, are sintered optocoupler
One end of light-receiving device also connect with second source, be sintered the other end ground connection of the light-receiving device of optocoupler, the sintering detection of relay
Method includes: to disconnect relay, when being closed the master switch of discharge loop, the light-receiving device of sintering processes module detection sintering optocoupler
Current potential V2；The signal whether being sintered according to the V2 output relay detected.
The sintering detection method of the relay in discharge loop proposed according to embodiments of the present invention, using independent power supply
The sintering of relay is detected with optocoupler, the interference of abnormal factors when can be effectively isolated detection, avoids showing for wrong report sintering
As so as to improve the reliability and accuracy of relay sintering detection.
The sintering detection system for the relay in discharge loop that embodiment proposes according to a further aspect of the invention, relay
Sintering detection system include relay sintering detection circuit, discharge loop includes master switch, relay, load, and relay is burnt
Knot detection circuit includes sintering processes module and sintering optocoupler, and the one end for being sintered the photophore of optocoupler is connect with the first power supply, is burnt
One end of the other end and relay of tying the photophore of optocoupler connects, and the other end ground connection of relay is sintered the light-receiving device of optocoupler
One end connect with sintering processes module, the one end for being sintered the light-receiving device of optocoupler is also connect with second source, be sintered optocoupler by
The other end of light device is grounded；Sintering processes module is used for when disconnecting relay, and disconnecting the master switch of discharge loop, and detection is burnt
Tie the current potential V1 of the light-receiving device of optocoupler；Sintering processes module is examined for disconnecting relay, and when the master switch of closure discharge loop
Survey the current potential V2 of the light-receiving device of sintering optocoupler；Whether sintering processes module is also used to be sintered according to the V2 output relay detected
Signal.
The sintering detection system of the relay in discharge loop proposed according to embodiments of the present invention, using independent power supply
The sintering of relay is detected with optocoupler, the interference of abnormal factors when can be effectively isolated detection, avoids showing for wrong report sintering
As so as to improve the reliability and accuracy of relay sintering detection.
Detailed description of the invention
Fig. 1 is the schematic diagram of the sintering detection system of the relay in discharge loop according to an embodiment of the invention.
Fig. 2 is the circuit diagram of the sintering detection system of the relay in discharge loop according to another embodiment of the present invention.
Fig. 3 is the circuit diagram of the sintering detection system of the relay in discharge loop according to another embodiment of the present invention.
Fig. 4 is the schematic stream of the sintering detection method of the relay in discharge loop according to an embodiment of the invention
Cheng Tu.
Fig. 5 is the schematic stream of the sintering detection method of the relay in discharge loop according to another embodiment of the present invention
Cheng Tu.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Photo-coupler (OpticalCoupler, OC) is also known as photoisolator or photoelectrical coupler, abbreviation optocoupler.Optocoupler is
Carry out the device of transmission telecommunications number using light as medium, usually (e.g., photophore (e.g., infrared light-emitting diode LED) and light-receiving device
Photosensitive semiconductor pipe) it is encapsulated in same shell.When input terminal power up signal, photophore emits beam, and light-receiving device receives light
Photoelectric current is just generated later, is flowed out from output end, to realize " electricity-light-electricity " conversion.The specific reality of the embodiment of the present application
Apply using the photophore of optocoupler as diode in the schematic diagram or circuit diagram of example, light-receiving device be triode for carry out exemplary theory
It is bright.
With reference to the accompanying drawings the sintering detection system of the relay in the discharge loop to describe the embodiment of the present invention and its
Method.
Fig. 1 is the schematic diagram of the sintering detection system of the relay in discharge loop according to an embodiment of the invention.
Discharge loop includes master switch, relay, load, and discharge loop can be through power supply by the master switch of discharge loop, relay, negative
Carry series connection forming circuit.
The sintering detection system of relay includes relay sintering detection circuit.Relay is sintered detection circuit
Sintering processes module and sintering optocoupler.The one end for being sintered the photophore of optocoupler is connect with the first power supply, is sintered the photophore of optocoupler
The other end and one end of relay connect, the other end of relay ground connection or connect third power supply.It is sintered the light-receiving device of optocoupler
One end is connect with sintering processes module, and the one end for being sintered the light-receiving device of optocoupler is also connect with second source, is sintered the light of optocoupler
The other end of device is grounded or connects the 4th power supply.
Sintering processes module is used for when disconnecting relay, and being closed the master switch of discharge loop, detection sintering optocoupler
The current potential V2 of light-receiving device.
Sintering processes module is also used to the signal whether being sintered according to the V2 output relay detected.
The sintering detection system for the relay in discharge loop that the embodiment of the present invention proposes, using independent power supply and light
The phenomenon that sintering of symplectic relay is detected, the interference of abnormal factors when can be effectively isolated detection, and wrong report is avoided to be sintered, from
And it can be improved the reliability and accuracy of relay sintering detection.
The voltage value of the third power supply of the embodiment of the present invention is set smaller than the voltage value of the first power supply, the electricity of the 4th power supply
Pressure value is set smaller than the voltage value of second source.
As an embodiment of the present invention, the signal the packet whether relay is sintered is exported according to the V2 detected
It includes: obtaining first threshold, when V2 is more than or equal to the first threshold, the unsintered signal of output relay is small in V2
When the first threshold, the signal of output relay sintering.Here first threshold can be set to be slightly less than second source
Voltage value value, or directly setting first threshold be second source voltage value.Such as second source position 12V, can be set
First threshold is 10V, considers detection error here.
As an embodiment of the present invention, relay is disconnected, the master switch of discharge loop, the inspection of sintering processes module are disconnected
Survey the current potential V1 of the light-receiving device of sintering optocoupler；Wherein, the signal packet whether being sintered according to the V2 output relay detected
It includes: the signal whether being sintered according to V1 the and V2 output relay detected.Consider that V1 and V2 are sintered relay simultaneously
The accuracy of detection can be improved in detection.
As an embodiment of the present invention, export what whether the relay was sintered according to the V1 and V2 that detect
Signal includes: acquisition second threshold, if V1-V2 is less than or equal to second threshold, the unsintered signal of output relay；If
V1-V2 is greater than the second threshold, then the signal of output relay sintering.Here second threshold can be set to 0 or omit
Value greater than 0.In fact, relay is un-sintered when V1=V2, but in order to avoid because of the mistake for judging sintering caused by potentiometric detection
Difference can set second threshold to the value slightly larger than 0.
As an embodiment of the present invention, the sintering detection system of relay further includes self-checking circuit, sintering processes mould
Block is also used to be sintered the whether normal signal of detection circuit according to the result output relay that self-checking circuit detects.Utilize self-test electricity
Road carries out self-test to entire circuit before relay is sintered detection, to improve the accuracy of sintering detection.
As an embodiment of the present invention, self-checking circuit includes self-test optocoupler, photophore one end and place of self-test optocoupler
Module connection is managed, one end connection of the other end ground connection of the photophore of self-test optocoupler, the light-receiving device of self-test optocoupler is sintered optocoupler
Photophore connection, another termination of the light-receiving device of self-test optocoupler.It is disconnected in relay, and when the master switch disconnection of discharge loop,
Sintering processes module is used to detect the current potential V3 of light-receiving device one end of the sintering optocoupler.Sintering processes module is also used to self-test
Optocoupler output signal detects the current potential V4 of light-receiving device one end of sintering optocoupler again later.Sintering processes module is also used to according to V3
And V4, output relay are sintered the whether normal signal of detection circuit.
Specifically, as one embodiment, sintering processes module is for exporting the relay sintering inspection in V3 > V4
The normal signal of slowdown monitoring circuit.Otherwise, abnormal signal of the sintering processes module for output relay sintering detection circuit.
Isolated power supply in the embodiment of the present invention can effectively avoid the influence of high-voltage power voltage, and optocoupler can effectively divide
Cut measure loop and be sintered circuit electrical connection, therefore, when detection system of the invention can be effectively isolated detection exception because
The interference of element improves the accuracy of relay sintering detection.
The relay sintering detection circuit of the embodiment of the present invention can also include diode D1, D2, and D1, which can connect, to be burnt
It ties between light Europe photophore and relay, D2 can connect between relay and ground, flow to for led current.
Fig. 2 is the circuit diagram of the sintering detection system of the relay in discharge loop according to another embodiment of the present invention.
Fig. 3 is also the circuit diagram of the sintering detection system of the relay in discharge loop according to another embodiment of the present invention.Fig. 2 and figure
The sintering detection system of 3 relay is identical, describes together here.The difference lies in that Fig. 2 and Fig. 3 are marked not with arrow respectively
With the circuit under detecting step, there is corresponding explanation in following method flow.
The sintering detection system of the relay of Fig. 2 and Fig. 3 includes relay sintering detection circuit.Discharge loop includes always opening
Pass, relay, load, discharge loop can be formed into a loop through power supply by the master switch, relay, load in series of discharge loop.
The power supply of discharge loop can be high-voltage DC power supply, such as power supply can be the full-vehicle control power supply of 24V.Relay sintering inspection
Slowdown monitoring circuit includes sintering processes module and sintering optocoupler.The one end for being sintered the photophore of optocoupler and the first power supply are (such as in Fig. 2
VCC2 it) connecting, one end (contact K1 of relay in such as Fig. 2) of the other end and relay that are sintered the photophore of optocoupler connects,
The other end (contact K2 of relay in such as Fig. 2) of relay is grounded, and is sintered one end and the sintering processes mould of the light-receiving device of optocoupler
Block connection, the one end for being sintered the light-receiving device of optocoupler are also connect with second source (such as VCC1 in Fig. 2), are sintered the light of optocoupler
The other end of device is grounded.
Fig. 2 and Fig. 3 is illustrated by taking self-test optocoupler and relay ground connection as an example in the embodiment of the present invention, it should be appreciated that
Ground connection in circuit diagram can be to connect other power supplys, as connect third power supply or the 4th power supply, third electricity in describing referring to Fig.1
The setting of the voltage value of source or the 4th power supply is also referred to the narration in Fig. 1, and to avoid repeating, in this not go into detail.
VCC2 power supply can be low-voltage isolation power source.High-voltage DC power supply by the master switch K of discharge loop, relay,
Load may be constructed circuit, and the one end master switch K connects high-voltage DC power supply, and the other end is connect with relay.Such as one end of switch K
The anode of high-voltage DC power supply is connected, the other end connects the contact K1 of relay.
The sintering detection system of relay further includes self-checking circuit, and self-checking circuit includes self-test optocoupler.The hair of self-test optocoupler
One end of light device is connect with sintering processes module, and the other end of the photophore of self-test optocoupler is grounded (GND in such as Fig. 2), self-test
One end of the light-receiving device of optocoupler is connect with the photophore of sintering optocoupler, and the other end of the light-receiving device of self-test optocoupler is grounded (in such as Fig. 2
GND).
Sintering processes module is connect with the photophore of self-test optocoupler, the electricity of photophore one end for detecting self-test optocoupler
Position.Sintering processes module is also connect with the light-receiving device of sintering optocoupler, the current potential of light-receiving device one end for detecting sintering optocoupler.From
The light-receiving device for examining optocoupler connect with the photophore of sintering optocoupler, for when the light-receiving device of self-test optocoupler is connected to being sintered optocoupler
Photophore provides electric signal.The photophore of sintering optocoupler is connect by diode D1 with relay, i.e. the light-receiving device of self-test optocoupler
It is connected in parallel with relay.The one end for being sintered the light-receiving device of optocoupler is connected to VCC1 power supply, other end ground connection by R1.It is sintered light
One end of the photophore of coupling is connected to VCC2 power supply by R2, and the other end is grounded by the light-receiving device of self-test optocoupler.VCC1 power supply
It can be low-voltage isolation power source with VCC2 power supply.
Specifically, sintering processes module is used for the connection in the contact K1 and the contact K2 for disconnecting relay, and disconnects electric discharge
When the master switch K in circuit, the current potential V1 of the light-receiving device of detection sintering optocoupler.Sintering processes module is also used to the K1 of guard relay
The connection of contact and the contact K2 disconnects, and when the master switch K of closure discharge loop, the current potential of the light-receiving device of detection sintering optocoupler
V2.The signal whether sintering processes module can be sintered according to V1 the and V2 output relay detected.
If sintering processes module is specifically used for V1-V2 and is less than or equal to second threshold, relay is un-sintered, sintering
Processing module is for exporting the unsintered signal of the relay.If V1-V2 is greater than second threshold, relay has been sintered, and is burnt
Tie the signal that processing module is used for output relay sintering.
Before detection relay sintering, sintering processes module is used to detect the light-receiving device one for the sintering optocoupler being attached thereto
The current potential V3 at end.Sintering processes module is used for self-test optocoupler output signal, and to self-test optocoupler output signal and then secondary
Detect the current potential V4 of the light-receiving device one end for the sintering optocoupler being attached thereto.Sintering processes module is also used to according to V3 and V4, output
Relay is sintered the whether normal signal of detection circuit.
Specifically, think that relay sintering detection circuit is normal in V3 > V4, otherwise relay sintering detection circuit is different
Often.As one embodiment, sintering processes module is used for the output relay in V3 > V4 and is sintered the normal signal of detection circuit,
The sintering detection system can be used to detect whether relay is sintered；Otherwise, sintering processes module output relay sintering detection electricity
The signal of road exception, the sintering detection system of the relay cannot be used for whether detection relay is sintered.
Existing sintering detection system can only judge that voltage difference or capacitance voltage variation could be detected in upper high pressure preliminary filling
Relay sintering state, abnormal factors are more when due to detection voltage, can there is the phenomenon that wrong report sintering, if there is sintering may
The case where will appear failure propagation.The sintering detection system of relay in the embodiment of the present invention can be in the upper low pressure such as electric vehicle
With upper high pressure can rapidly, the sintering state of accurate detection relay, vehicle offer accurately and reliably relay shape is provided
State information.Existing sintering detection circuit can only detect the sintering of the relay with pre-charging capacitor, have limitation.In addition, this
The sintering detection circuit of inventive embodiments can be widely applied for the sintering detection of relay without being defined to capacitor.
The sintering detection system of the relay of the embodiment of the present invention uses independent two-way isolated power supply and two-way optocoupler, energy
It is effectively isolated interference, ensures circuit stability, accurate, reliable.The sintering detection system of the relay of the embodiment of the present invention runs function
Low, high reliablity is consumed, vehicle security reliability is promoted.And component used in system is all mature electronic component, can be criticized
Amount buying, is convenient for industrialization promotion application.
The sintering detection system of relay in the discharge loop of the embodiment of the present invention is for executing in following method distance
Relay sintering detection method, be sintered detection system in modules or unit function and method flow in step
It is corresponding.
Fig. 4 is the schematic stream of the sintering detection method of the relay in discharge loop according to an embodiment of the invention
Cheng Tu.The sintering detection method can be executed by the sintering detection system of Fig. 1, Fig. 2 and Fig. 3.
401, relay is disconnected, the master switch of discharge loop, the light-receiving device of sintering processes module detection sintering optocoupler are disconnected
Current potential V2.
402, the signal whether being sintered according to the V2 output relay detected.
The sintering detection method of the relay in discharge loop proposed according to embodiments of the present invention, using independent power supply
The phenomenon that sintering of relay is detected with optocoupler, the interference of detection abnormal factors can be effectively isolated, wrong report is avoided to be sintered,
So as to improve the reliability and accuracy of relay sintering detection.
Optionally, as an embodiment of the present invention, whether it is sintered according to the V2 output relay detected
Signal includes: acquisition first threshold；When V2 is more than or equal to first threshold, the unsintered signal of output relay；In V2
When less than first threshold, the signal of output relay sintering.
Optionally, as an embodiment of the present invention, whether it is sintered according to the V2 output relay detected
Signal includes: disconnection relay, disconnects the master switch of discharge loop, the electricity of the light-receiving device of sintering processes module detection sintering optocoupler
Position V1；It wherein, include: according to the V1 that detects and described according to the signal whether the V2 output relay detected is sintered
The signal whether V2 output relay is sintered.
Optionally, as an embodiment of the present invention, export whether the relay burns according to the V1 and V2 detected
If the signal of knot includes: that V1-V2 is less than or equal to second threshold, it is un-sintered that sintering processes module exports the relay
Signal, if V1-V2 be greater than second threshold, sintering processes module export institute's electric appliance sintering signal.
Optionally, as an embodiment of the present invention, the sintering detection system of relay further includes self-checking circuit, self-test
Whether circuit is normal for detecting relay sintering detection circuit.Before being detected to relay sintering, route is carried out
Self-test, to improve the accuracy of detection.
Optionally, as an embodiment of the present invention, self-checking circuit includes self-test optocoupler.The photophore one of self-test optocoupler
End is connect with sintering processes module, the other end ground connection of the photophore of self-test optocoupler, one end connection of the light-receiving device of self-test optocoupler
It is sintered the photophore connection of optocoupler, the other end ground connection of the light-receiving device of self-test optocoupler.The sintering detection method of relay further include:
When disconnecting relay, and disconnecting the master switch of discharge loop, the electricity of light-receiving device one end of sintering processes module detection sintering optocoupler
Position V3；Sintering processes module is to self-test optocoupler output signal；Sintering processes module is to self-test optocoupler output signal and then secondary
The current potential V4 of light-receiving device one end of detection sintering optocoupler；Sintering processes module is according to V3 and V4, output relay sintering detection electricity
The whether normal signal in road.
Optionally, as an embodiment of the present invention, sintering processes module is according to V3 and V4, output relay sintering inspection
If the whether normal signal of slowdown monitoring circuit includes: V3 > V4, sintering processes module output relay is sintered the normal of detection circuit
Signal；Otherwise, the abnormal signal of sintering processes module output relay sintering detection circuit.
Fig. 5 is the schematic stream of the sintering detection method of the relay in discharge loop according to another embodiment of the present invention
Cheng Tu.The sintering detection method can be executed by the sintering detection system of Fig. 1, Fig. 2 and Fig. 3.
501, when disconnecting relay, and disconnecting the master switch of discharge loop, sintering processes module detects the burning being attached thereto
Tie the current potential V3 of light-receiving device one end of optocoupler.
502, sintering processes module is to self-test optocoupler output signal.
503, sintering processes module is in the sintering optocoupler being attached thereto to self-test optocoupler output signal and then secondary detection
The current potential V4 of light-receiving device one end.
504, sintering processes module is sintered the whether normal signal of detection circuit according to V3 and V4, output relay.
505, if 504 obtain relay sintering detection circuit it is normal, disconnect relay, disconnect always opening for discharge loop
It closes, the current potential V1 of the light-receiving device of sintering processes module detection sintering optocoupler.
506, guard relay disconnects, and is closed the master switch of discharge loop, sintering processes module detection sintering optocoupler by
The current potential V2 of light device.
507, the signal whether being sintered according to V1 and V2 output relay.
508, if 504 obtain relay sintering detection circuit exception, do not utilize the sintering detection circuit to carry out relay
The sintering of device detects.
It should be understood that step 501 to step 504 is optional step, when detecting the sintering of relay, can directly execute
Step 505 is to step 507.Step 501 to step 504 may determine that whether relay sintering detection circuit is normal, further mentions
The accuracy and reliability of height sintering detection.
It is illustrated by taking the sintering of the relay in detection circuit as an example below, the sintering detection side of this relay
Method is equally applicable to the sintering for other relays that detection system includes, and detection method all can refer to the detection of the sintering to relay
Method, the comparison present invention no longer repeat one by one.
The master switch of discharge loop is disconnected, i.e. disconnection K, and disconnects relay, that is, disconnects the connection of the contact K1 and the contact K2,
It is powered on for sintering processes module, self-test is carried out to the relay sintering detection circuit of relay, for detecting relay sintering
Whether detection circuit itself is normal.The connection of the contact K1 Yu the contact K2 is remained open, K is closed, the sintering of relay is examined
It surveys, for detecting whether relay is sintered.
Testing process is specifically described below.
1. the sintering of relay detects
It is powered on for sintering processes module, sintering processes module, self-test optocoupler ground connection constitute circuit, as represented by the arrows in the dashed line in figure 2.
Relay is disconnected, the master switch K of discharge loop, the electricity of the light-receiving device of sintering processes module detection sintering optocoupler are disconnected
Position V1.The light-receiving device for being sintered optocoupler at this time does not turn on, and directly connect with power supply VCC1, and V1 is equal to the voltage of VCC1 power supply.It disconnects
Relay, is closed K, and sintering processes module detects the current potential V2 of the light-receiving device of the sintering optocoupler.According to the V1 and V2 detected
Judge whether relay is sintered.
If relay is un-sintered, sintering processes module detection sintering optocoupler light-receiving device end current potential meet V1-V2≤
Second threshold.Second threshold can be 0 or the value slightly larger than 0.
If relay is sintered, electric current flow through VCC2 power supply, R2, be sintered the photophore of optocoupler, diode D1, relay,
Diode D2 to GND constitutes circuit, as shown in the dotted line arrow in Fig. 3.The photophore of electric current sintering galvanic couple, so that sintering electricity
Even light-receiving device end conducting, i.e. route VCC1 power supply, R1, the light-receiving device for being sintered optocoupler, GND conducting.At this moment sintering processes module
The current potential at the light-receiving device end of detection sintering optocoupler is V2.Electric current generates voltage drop from power supply VCC1, through R1, and V2 is less than power supply
The voltage of VCC1, i.e. V2 < V1.
In other words, relay is disconnected, K is closed, the detection of sintering processes module is sintered the voltage of optocoupler light-receiving device one end, such as
Fruit detects high level, it is determined that relay is un-sintered, and sintering processes module can export the relay to automobile instrument and not burn
The signal of knot；If detection obtains low level, it is determined that relay has been sintered, and sintering processes module can be exported to automobile instrument
The signal that the relay has been sintered.
The sintering detection system of the relay proposed according to embodiments of the present invention, using independent power supply and optocoupler to relay
The phenomenon that sintering of device is detected, the interference of abnormal factors when can be effectively isolated detection, and wrong report is avoided to be sintered, so as to mention
The reliability and accuracy of high relay sintering.
2. relay is sintered detection circuit self-test
Before relay sintering detection, can sintering detection circuit to relay carry out self-test, to ensure the burning of relay
Knot detection circuit is normal, can further increase the reliability of sintering detection.
K is disconnected, relay is disconnected, is powered on for sintering processes module, sintering processes module, self-test optocoupler ground connection are constituted back
Road, as represented by the arrows in the dashed line in figure 2.The current potential at the light-receiving device end of the sintering optocoupler of sintering processes module detection connection is V3.It burns
The light-receiving device of knot optocoupler does not turn on, and directly connect with power supply VCC1, and V3 is equal to the voltage of VCC1 power supply.
Control sintering processes module output signal gives self-test optocoupler, and self-test optocoupler receives signal, photophore is made to emit beam,
Light-receiving device receives light and generates photoelectric current, the light-receiving device conducting of self-test optocoupler, in this way, electric current flows through VCC2 power supply, R2, sintering light
The photophore of coupling, the photophore of self-test optocoupler constitute circuit to GND, as shown in the dotted line arrow in Fig. 2.It is sintered the hair of optocoupler
Light device end has electric current to pass through, and electric signal makes the photophore for being sintered optocoupler shine, in this way the light-receiving device conducting of sintering optocoupler, and then makes
Route VCC1 power supply, R1, be sintered optocoupler light-receiving device, GND conducting, i.e., electricity VCC1 power supply, R1, sintering optocoupler light-receiving device be followed by
GND.The current potential at the light-receiving device end for the sintering optocoupler that sintering processes module detects at this time is V4.Sintering processes module can root
According to V3 and V4, whether output relay is sintered detection circuit normal.If detection circuit is normal, since the voltage of VCC1 power supply passes through
There is voltage drop after R1, the V4 detected should be less than the voltage of VCC1 power supply, i.e. V4 < V3.
In other words, K is disconnected, relay is disconnected, before and after self-test optocoupler receives signal, the detection sintering of sintering processes module
The current potential of optocoupler light-receiving device one end is respectively V3, V4, if V4 < V3, relay sintering detection circuit is normal, Ke Yiyong
It is detected in the sintering of relay, sintering processes module output relay is sintered the normal signal of detection circuit, the sintering of relay
Detection system can be used to detect the signal of the sintering of relay；Otherwise it is assumed that relay sintering detection circuit is abnormal, it is impossible to be used in
The sintering of relay detects.In other words, K is disconnected, the connection of the contact K1 and the contact K2 is disconnected, before self-test optocoupler receives signal,
Sintering processes module detects high level respectively, detects low level, sintering processes module pair after self-test optocoupler receives signal
After level signal processing, output relay is sintered the normal signal of detection circuit, and otherwise output relay sintering detection circuit is different
Normal signal.
The present invention is intended to provide a kind of relay sintering detection apparatus based on semiconductor circuit, in electric vehicle, mixed motor-car
Detection is sintered to relay in equal high tension loops, provides accurate, reliable relay status information, accurate judgement to vehicle
It is sintered failure, other serious consequences caused by eliminating because of relay sintering.
It may include multiple relays in the discharge loop of the embodiment of the present invention, multiple relays can share a sintering
Detection module, multiple relays can also be sintered detection simultaneously, and the signal of sintering processes module output can respectively correspond
Different relays.
It should be understood that should all be examined when relay disconnects when the embodiment of the present invention is sintered detection to relay
It surveys.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (14)
1. a kind of sintering detection method of the relay in discharge loop, the discharge loop includes master switch, relay, bears
It carries, which is characterized in that sintering detection system of the method for the relay in discharge loop, the sintering detection system packet
Relay sintering detection circuit is included, the relay sintering detection circuit includes sintering processes module and sintering optocoupler, the burning
The one end for tying the photophore of optocoupler is connect with the first power supply, the other end and the relay of the photophore of the sintering optocoupler
One end connection, the other end ground connection of the relay or connects third power supply, one end of the light-receiving device of the sintering optocoupler with it is described
One end of light-receiving device of the connection of sintering processes module, the sintering optocoupler also connect with second source, it is described be sintered optocoupler by
The other end of light device is grounded or connects the 4th power supply, and the sintering detection method of the relay includes:
The relay is disconnected, when being closed the master switch of the discharge loop, the sintering processes module detects the sintering
The current potential V2 of the light-receiving device of optocoupler；
The signal whether relay is sintered is exported according to the V2 detected.
2. the sintering detection method of relay as described in claim 1, which is characterized in that the V2 that the basis detects
Exporting the signal whether relay is sintered includes:
When V2 is more than or equal to first threshold, the unsintered signal of the relay is exported；
When V2 is less than the first threshold, the signal of the relay sintering is exported.
3. the sintering detection method of relay as described in claim 1, which is characterized in that the sintering detection side of the relay
Method further include:
The relay is disconnected, when disconnecting the master switch of the discharge loop, the sintering processes module detects the sintering
The current potential V1 of the light-receiving device of optocoupler；
Wherein, the V2 that the basis detects exports the signal whether relay is sintered specifically:
The signal whether relay is sintered is exported according to the V1 and the V2 that detect.
4. the sintering detection method of relay as claimed in claim 3, which is characterized in that the V1 that the basis detects
Exporting the signal whether relay is sintered with V2 includes:
If V1-V2 is less than or equal to second threshold, the sintering processes module exports the unsintered letter of relay
Number；
If V1-V2 is greater than the second threshold, the sintering processes module exports the signal of the relay sintering.
5. such as the sintering detection method of relay of any of claims 1-4, which is characterized in that the relay
Being sintered detection system further includes self-checking circuit, the sintering detection method of the relay further include:
Whether the sintering processes module exports the relay sintering detection circuit according to the result that the self-checking circuit detects
Normal signal.
6. the sintering detection method of relay as claimed in claim 5, which is characterized in that the self-checking circuit includes self-test light
Coupling, photophore one end of the self-test optocoupler are connect with the sintering processes module, the photophore of the self-test optocoupler it is another
End ground connection, one end of the light-receiving device of the self-test optocoupler connect the photophore connection of the sintering optocoupler, the self-test optocoupler
The other end of light-receiving device is grounded, the sintering detection method of the relay further include:
When disconnecting the relay, and disconnecting the master switch of the discharge loop, the sintering processes module detects the sintering
The current potential V3 of light-receiving device one end of optocoupler；
The sintering processes module is in the light-receiving device to the self-test optocoupler output signal and then the secondary detection sintering optocoupler
The current potential V4 of one end；
The sintering processes module exports whether the relay sintering detection circuit is normally believed according to the V3 and the V4
Number.
7. the sintering detection method of relay as claimed in claim 6, which is characterized in that it is characterized in that, at the sintering
Module is managed according to the V3 and the V4, exporting the relay sintering whether normal signal of detection circuit includes:
If V3 > V4, the sintering processes module exports the normal signal of the relay sintering detection circuit；Otherwise, described
Sintering processes module exports the abnormal signal of the relay sintering detection circuit.
8. a kind of sintering detection system of the relay in discharge loop, the discharge loop includes master switch, relay, bears
It carries, which is characterized in that the sintering detection system of the relay includes relay sintering detection circuit, the relay sintering inspection
Slowdown monitoring circuit includes sintering processes module and sintering optocoupler, and one end of the photophore of the sintering optocoupler is connect with the first power supply, institute
The other end of photophore for stating sintering optocoupler is connect with one end of the relay, and the other end of the relay is grounded or connects the
One end of three power supplys, the light-receiving device of the sintering optocoupler is connect with the sintering processes module, the light-receiving device of the sintering optocoupler
One end also connect with second source, the other end ground connection of the light-receiving device of the sintering optocoupler or connect the 4th power supply；
The sintering processes module is used to detect the burning when disconnecting relay, and being closed the master switch of the discharge loop
Tie the current potential V2 of the light-receiving device of optocoupler；
The sintering processes module is also used to export the signal whether relay is sintered according to the V2 detected.
9. the sintering detection system of relay as claimed in claim 8, which is characterized in that the sintering processes module is specifically used
In when V2 is more than or equal to first threshold, the unsintered signal of the relay is exported, is less than the first threshold in V2
When, export the signal of the relay sintering.
10. the sintering detection system of relay as claimed in claim 8, which is characterized in that the sintering processes module is also used
In disconnecting the relay, when disconnecting the master switch of the discharge loop, the current potential of the light-receiving device of the sintering optocoupler is detected
V1, the sintering processes module are also used to export the signal whether relay is sintered according to the V2 detected specific
According to the V1 that the detects and V2 export the signal whether relay is sintered.
11. the sintering detection system of relay as claimed in claim 10, which is characterized in that the sintering processes module is specific
For exporting the unsintered signal of the relay when V1-V2 is less than or equal to second threshold, it is greater than described the in V1-V2
The signal of the relay sintering is exported when two threshold values.
12. the sintering detection system of the relay as described in any one of claim 8-11, which is characterized in that the relay
Sintering detection system further include self-checking circuit, the sintering processes module be also used to according to the self-checking circuit detect result
Export the relay sintering whether normal signal of detection circuit.
13. the sintering detection system of relay as claimed in claim 12, which is characterized in that the self-checking circuit includes self-test
Photophore one end of optocoupler, the self-test optocoupler is connect with the processing module, the other end of the photophore of the self-test optocoupler
Ground connection, one end of the light-receiving device of the self-test optocoupler connect it is described sintering optocoupler photophore connection, the self-test optocoupler by
The other end of light device is grounded；
It is disconnected in the relay, and when the master switch disconnection of the discharge loop, the sintering processes module is for detecting institute
State the current potential V3 of light-receiving device one end of sintering optocoupler；
The sintering processes module be used for the self-test optocoupler output signal and then it is secondary detection it is described sintering optocoupler by
The current potential V4 of light device one end；
The sintering processes module is also used to whether just to export the relay sintering detection circuit according to the V3 and the V4
Normal signal.
14. the sintering detection system of relay as claimed in claim 13, which is characterized in that it is characterized in that, the sintering
Processing module is used to export the normal signal of the relay sintering detection circuit in V3 > V4；Otherwise, the sintering processes
Module is used to export the abnormal signal of the relay sintering detection circuit.
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