CN109638932A - A kind of charge and discharge double interlock control circuit of electric car - Google Patents
A kind of charge and discharge double interlock control circuit of electric car Download PDFInfo
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- CN109638932A CN109638932A CN201910153574.5A CN201910153574A CN109638932A CN 109638932 A CN109638932 A CN 109638932A CN 201910153574 A CN201910153574 A CN 201910153574A CN 109638932 A CN109638932 A CN 109638932A
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- relay
- triode
- resistance
- photoelectrical coupler
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a kind of charge and discharge double interlock control circuits of electric car, the charging and discharging state differentiates electric vehicle accumulator internal resistance variation of the circuit by detection, and same or logic judgment is carried out into the signal of same or door chip U1 and battery control unit output, confirm the charging and discharging state of battery, enter photoelectrical coupler later and interlocks driving circuit, through interlocking relay K2 normally-closed contact K2-2, relay K1 normally-closed contact K1-2 is added to photoelectrical coupler U2, the photoelectric isolating circuit of photoelectrical coupler U3 composition, the high/low level of feedback photoelectric coupler U2/U3 output simultaneously disconnects the high/low level that charging and discharging state differentiation circuit is sent to photoelectrical coupler U3/U2 input terminal, realize interlocking, the relay interlock protection circuit by put/charge circuit series connection after Electric appliance K1/K2 normally closed switch is interlocked again, and relay K1/K2 normal open switch selects timing closing switch, it is ensured that the interlocking reliability of charge and discharge.Effective solution charge and discharge interlock insecure problem.
Description
Technical field
The present invention relates to electric car charge and discharge protecting technical field, the charge and discharge more particularly to a kind of electric car are double
Weight interlocking control circuit.
Background technique
Prior art discloses application No. is: a kind of 201310653405.0 electric vehicle charge and discharge interlock circuit passes through
Be attempted by the relay K0 of charge circuit coil whether it is electric determine whether charging signals, normally closed switch K01/ is normally opened opens for control
The charge and discharge control signal that K02 movement is interlocked, and exported according to battery control unit is closed, corresponding contactor coil is driven
K4/K3 coil obtains electric, normal open switch closure, and then it is electric to obtain contactor K1/K2 coil, and normally opened contact closure, connection is discharged back
Road or charge circuit are not turned on discharge loop when charging, and charge circuit is not turned on when electric discharge, and it is double to realize charging and discharging circuit
It interlocks again, protects related facility and personnel safety, improve battery pack charging security, extend product service life.
However the prior art is when in use, mostly used to take into account charging rate and service lifetime of accumulator (constant current section,
Constant pressure section, floating charge section) charging of three stages, when due to constant current section and floating charge section, the charging voltage gap of charger output is big, can be because
The voltage for being added to relay K0 coil is not voltage rating, causes the coil of relay K0 to malfunction, and work as battery control unit
When the charge and discharge control signal of output is wrong, the contactor K1/K2 switch of discharge loop and charge circuit is in addition connected without real
It now interlocks, will cause charge and discharge and interlock insecure problem.
The present invention provides the new scheme of one kind to solve the problems, such as this.
Summary of the invention
For above situation, for the defect for overcoming the prior art, purpose of the present invention is to provide a kind of electric cars
Charge and discharge double interlock control circuits, whether the current coil using the relay K0 for being attempted by charge circuit of effective solution
The contactor K1/K2 switch that electric must determine whether charging signals and connection discharge loop and charge circuit is not carried out interlocking, makes
At charge and discharge interlock insecure problem.
Its technical solution solved is, including charging and discharging state differentiates that circuit, photoelectrical coupler interlock driving circuit, relay
Device interlock protection circuit, which is characterized in that the charging and discharging state differentiates in the battery that circuit passes through model YXD-3006
Tester real-time detection electric vehicle accumulator internal resistance is hindered, resistance R0 is equivalent to, the bleeder circuit formed through resistance R1, resistance R0
It converts the variation of internal resistance to the variation of voltage, enters the integrator that operational amplifier AR1 is core later and calculate voltage change
Rate, difference driving triode Q1/ triode Q2 conducting, output are filled with accumulator of electric car when voltage change ratio is positive/negative
The corresponding high/low level of electricity condition/discharge condition, the electric car into same or door chip U1 and battery control unit output store
Battery charging and discharging signal carries out same or logic judgment, when consistent, differentiates accumulator of electric car state, exports high level, relay
Device K3 coil obtains electric, normally opened contact K3-1 closure, the closed normally opened contact K3-1 of the photoelectrical coupler interlocking driving circuit
The high/low level of triode Q1/ triode Q2 output is received, it is normal through interlocking relay K2 normally-closed contact K2-2, relay K1
Closed contact K1-2 is added to the photoelectric isolating circuit of photoelectrical coupler U2, photoelectrical coupler U3 composition, when receiving high/low level,
Photoelectrical coupler U2/U3 work, exports high/low level, and trigger triode Q3/Q4 is connected all the way, obtains relay K1/K2 coil
Electricity, while it is normally closed to photoelectrical coupler U3/U2 input terminal, relay K1 normally-closed contact K1-2/ relay K2 to feed back high/low level
Contact K2-2 disconnects charging and discharging state and differentiates the high/low level that sends of circuit, realizes interlocking with this, it is ensured that relay K1 with
Relay K1 single can only obtain electric, the timing closing switch K1-1 that the relay interlock protection circuit passes through corresponding relay K1
With K1-11, normally closed switch K1-3 and K1-31 and relay K2 timing closing switch K2-1 and K2-11, normally closed switch K2-3 and
The interlocking action of K2-31 realizes the interlock protection that accumulator of electric car is charged/discharged by motor by charger；
The photoelectrical coupler interlocking driving circuit includes relay K3 normally opened contact K3-1, relay K3 normally opened contact K3-1's
The other end of the emitter of one end connecting triode Q1, relay K3 normally opened contact K3-1 is separately connected relay K2 normally-closed contact
One end of K2-2, relay K1 closed contact K12 one end, the other end of relay K2 normally-closed contact K2-2 is separately connected photoelectricity coupling
The base stage of the pin 1 of clutch U2, triode Q4, the pin 2 of photoelectrical coupler U2 connect ground, and the pin 4 of photoelectrical coupler U2 is logical
Cross resistance R5 connection power supply+15V, photoelectrical coupler U2 pin 3 be separately connected the cathode of voltage-stabiliser tube Z1, resistance R6 one end,
One end of capacitor C3, triode Q3 base stage, the anode of voltage-stabiliser tube Z1, the other end of resistance R6, the other end of capacitor C3, three poles
The emitter of pipe Q3 is all connected with ground, and the collector of triode Q3 is separately connected relay K1 coil one end, diode D4 anode, after
The coil other end of electric appliance K1 connects power supply+15V, the other end difference of relay K1 normally-closed contact K1-2 with diode D4 cathode
Connect the base stage of the pin 2 of photoelectrical coupler U3, triode Q3, the pin 1 of photoelectrical coupler U3 by resistance R7 connection power supply+
The pin 4 of 5V, photoelectrical coupler U3 are separately connected one end of resistance R8, one end of resistance R9, one end of capacitor C4, triode Q4
Base stage, the emitter of triode Q4 connects power supply+15V, the collector of triode Q4 be separately connected relay K4 coil one end,
Diode D5 cathode, the pin 3 of photoelectrical coupler U3, the other end of resistance R9, the other end of capacitor C4, relay K2 coil
The other end and diode D5 anode are all connected with ground.
Due to the use of above technical scheme, the present invention has the following advantages that compared with prior art；
1, the electric vehicle accumulator internal resistance variation detected by accumulator internal resistance tester tentatively judges accumulator cell charging and discharging shape
State, and same or logic is carried out into the accumulator of electric car charge and discharge electric signal of same or door chip U1 and battery control unit output
Judgement when consistent, export high level, confirms the state of accumulator of electric car, improves and differentiate accumulator of electric car state
Accuracy, avoid be attempted by the relay K0 of charge circuit coil whether electric determine whether charging signals attonity
Problem；
2, when being determined as charge or discharge state, photoelectrical coupler U2/U3 work, makes relay K1/ at triode Q3/Q4 conducting
K2 coil obtain it is electric, go here and there 2/ U2 pin 1 of photoelectrical coupler U3 pin normally-closed contact K1-2/ K2-2 disconnect, if avoiding next
A detection signal is just low level/triode Q1 output high level of triode Q2 output, and relay K1/K2 coil comes
Not as good as power loss, relay K2/K1 obtains electric situation and occurs, while when in order to guarantee that relay K1/K2 coil obtains electric, relay
K2/K1 coil will not obtain it is electric, by photoelectrical coupler U2/U3 output voltage through capacitor C5/C6 feed back drawing to photoelectrical coupler U3
The pin 1 of 2/ U2 of foot, maintains high/low level that photoelectrical coupler U3/U2 is made not work, and realizes interlocking with this, it is ensured that Ren Heshi
It carves, permission relay K1 or relay K2 are electricly single, to improve the interlocking reliability of driving signal；
3, it to discharge loop and is filled in discharge loop, charge circuit series relay K1 normally closed switch, relay K2 normally closed switch
Electrical circuit is interlocked again, and relay K1/K2 normal open switch selects timing closing switch, further avoids relay
When K1, relay K2 are missed while being obtained electric, charge and discharge interlock insecure problem.
Detailed description of the invention
Fig. 1 is a kind of module map of the charge and discharge double interlock control circuit of electric car of the present invention.
Fig. 2 is that charging and discharging state of the invention differentiates circuit diagram.
Fig. 3 is that photoelectrical coupler of the invention interlocks driver circuit schematic diagram.
Fig. 4 is relay interlock protection circuit schematic diagram of the invention.
Specific embodiment
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to figures 1 through attached drawing 4
To in the detailed description of embodiment, can clearly present.The structure content being previously mentioned in following embodiment is with specification
Attached drawing is reference.
Embodiment one, a kind of charge and discharge double interlock control circuit of electric car, the charging and discharging state differentiate circuit
By the accumulator internal resistance tester real-time detection electric vehicle accumulator internal resistance of model YXD-3006, (specific detection process is
The prior art, this will not be detailed here), internal resistance is equivalent to resistance R0 after detection, and the bleeder circuit through resistance R1, resistance R0 composition will
The variation of internal resistance is converted into the variation of voltage, enters operational amplifier AR1, resistance R2, resistance R3, resistance R4, capacitor C1 later
The integrator of composition calculates voltage change ratio, exports the corresponding voltage signal of internal resistance change rate of certain time, voltage change
Rate is timing, and the emitter output of diode D1 conducting, driving triode Q1 conducting, triode Q1 is filled with accumulator of electric car
The corresponding high level of electricity condition, when voltage change ratio is negative, ground, capacitor C2, diode D2, voltage change ratio negative signal constitute electricity
The emitter output in the circuit of circulation, triode Q2 conducting, triode Q2 is corresponding with accumulator of electric car discharge condition
Low level, high/low level enter the same or door chip U1 of model DM5486 and the electronic vapour of battery control unit output later
Vehicle accumulator cell charging and discharging signal carry out with or logic judgment, according to or door truth table it is consistent when (triode Q1 or Q2 output and
When battery control unit output is all high level or low level), same or door chip U1 pin 3 exports high level, confirms electronic vapour
The state of vehicle battery improves the accuracy for differentiating accumulator of electric car state, driving triode Q5 conducting later, relay
Device K3 coil obtains electric, normally opened contact K3-1 closure, allows the high/low level of triode Q1 or Q2 output to enter photoelectrical coupler mutual
Lock driving circuit, through interlocking relay K2 normally-closed contact K2-2, relay K1 normally-closed contact K1-2 be added to photoelectrical coupler U2,
The photoelectric isolating circuit of photoelectrical coupler U3 composition, specifically when receiving high level, photoelectrical coupler U2 work conducting, resistance
After high level (+5V), voltage-stabiliser tube Z1 pressure stabilizing after R5 and resistance R6 right+15V partial pressure, trigger triode Q3 is connected all the way, make after
Electric appliance K1 coil obtain it is electric, go here and there photoelectrical coupler U3 pin 2 relay K1 normally-closed contact K1-2 disconnect, if avoiding next inspection
The low level that signal is just triode Q2 output is surveyed, and relay K1 coil has little time power loss, relay K2 obtains electric situation
Occur, while when in order to guarantee that relay K1 coil obtains electric, relay K2 coil will not obtain it is electric, by the high level after partial pressure through electricity
Hold C5 feedback to the pin 2 of photoelectrical coupler U3, maintains high level that photoelectrical coupler U3 is made not work, it is same to receive low level
When, photoelectrical coupler U3 work conducting, output low level (+0V), all the way trigger triode Q4 are connected, and obtain relay K2 coil
Electricity is gone here and there and is disconnected in the relay K2 normally-closed contact K2-2 of photoelectrical coupler U2 pin 1, if avoiding next detection signal from being just
The high level of triode Q1 output, and relay K2 coil has little time power loss, relay K1 obtains electric situation and occurs, while in order to
Guarantee relay K2 coil when obtaining electric, relay K1 coil will not obtain it is electric, by photoelectrical coupler U3 output low level through capacitor C6
The pin 1 for feeding back photoelectrical coupler U2, makes photoelectrical coupler U1 not work, and realizes interlocking with this, it is ensured that any moment only permits
Perhaps relay K1 or relay K2 is electricly single, to improve the interlocking reliability of driving signal, the relay interlock protection electricity
Road be used for when relay K1 coil electric, relay K2 coil power-off when, the normal open switch of the timing closing of relay K1
K1-1, K1-11 are closed at, battery P1 anode and cathode respectively through relay K2 normally closed switch (K2-3, K2-31), close
The normal open switch (K1-1, K1-11) of conjunction is added to the pin 1 and pin 2 of charger H2, and accumulator of electric car P1 is made to pass through charging
Machine charging, while normally closed switch K1-3, K1-31 of relay K1 are instantaneously disconnected, and cut off accumulator of electric car P1 to motor H2
Discharge loop, similarly, when in photoelectrical coupler interlocking driving circuit relay K2 coil it is electric, relay K1 coil disconnected
When electric, normal open switch K2-1, K2-11 of the timing closing of relay K2 are closed at, and pin 1, the pin 2 of motor H1 passes through respectively
Relay K2 normally closed switch (K2-1, K2-11), the relay K1 normally closed switch (K1-3, K1-31) of closure are added to battery P1's
Anode and cathode make accumulator of electric car P1 discharge to motor H1, while normally closed switch K2-3, K2-31 wink of relay K2
When disconnect, cutting accumulator of electric car P1 by charger H2 charge circuit, with this discharge loop, charge circuit series connection after
Electric appliance K1 normally closed switch, relay K2 normally closed switch interlock discharge loop and charge circuit again, avoid relay K1,
When relay K2 is missed while being obtained electric, charge and discharge interlock insecure problem；
The closed normally opened contact K3-1 of the photoelectrical coupler interlocking driving circuit receives triode Q1/ triode Q2 output
High/low level, through interlocking relay K2 normally-closed contact K2-2, relay K1 normally-closed contact K1-2 be added to photoelectrical coupler U2,
The photoelectric isolating circuit of photoelectrical coupler U3 composition, when receiving high level, photoelectrical coupler U2 work is connected, resistance R5 and electricity
After high level (+5V), voltage-stabiliser tube Z1 pressure stabilizing after hindering the right+15V partial pressure of R6, trigger triode Q3 is connected all the way, makes relay K1
Coil obtain it is electric, go here and there photoelectrical coupler U3 pin 2 relay K1 normally-closed contact K1-2 disconnect, if avoiding next detection signal
It is just the low level of triode Q2 output, and relay K1 coil has little time power loss, relay K2 obtains electric situation and occurs, together
When in order to guarantee that relay K1 coil obtains electric when, relay K2 coil will not obtain it is electric, the high level after partial pressure is anti-through capacitor C5
It is fed to the pin 2 of photoelectrical coupler U3, photoelectrical coupler U3 is made not work, when should receive low level together, photoelectrical coupler U3
Work conducting, output low level (+0V), all the way trigger triode Q4 are connected, and obtain relay K2 coil electric, go here and there in photoelectric coupling
The relay K2 normally-closed contact K2-2 of device U2 pin 1 is disconnected, if avoiding next detection signal is just what triode Q1 was exported
High level, and relay K2 coil has little time power loss, relay K1 obtains electric situation and occurs, while in order to guarantee relay K2 line
When enclosing electric, relay K1 coil will not obtain electric, and photoelectrical coupler U3 is exported low level and is fed back through capacitor C6 to photoelectric coupling
The pin 1 of device U2, makes photoelectrical coupler U1 not work, and realizes interlocking with this, it is ensured that relay K1 and relay K2 can only be single
Must be electric, including relay K3 normally opened contact K3-1, the emitter of one end connecting triode Q1 of relay K3 normally opened contact K3-1,
The other end of relay K3 normally opened contact K3-1 is separately connected one end of relay K2 normally-closed contact K2-2, relay K1 closed contact
One end of K12, the other end of relay K2 normally-closed contact K2-2 are separately connected the pin 1 of photoelectrical coupler U2, triode Q4
Base stage, the pin 2 of photoelectrical coupler U2 connect ground, and the pin 4 of photoelectrical coupler U2 passes through resistance R5 connection power supply+15V, photoelectricity
The pin 3 of coupler U2 is separately connected the base of the cathode of voltage-stabiliser tube Z1, one end of resistance R6, one end of capacitor C3, triode Q3
Pole, the anode of voltage-stabiliser tube Z1, the other end of resistance R6, the other end of capacitor C3, triode Q3 emitter be all connected with ground, three poles
The collector of pipe Q3 is separately connected relay K1 coil one end, diode D4 anode, the coil other end of relay K1 and two poles
Pipe D4 cathode connect power supply+15V, the other end of relay K1 normally-closed contact K1-2 be separately connected the pin 2 of photoelectrical coupler U3,
The pin 1 of the base stage of triode Q3, photoelectrical coupler U3 is divided by the pin 4 of resistance R7 connection power supply+5V, photoelectrical coupler U3
Not Lian Jie one end of resistance R8, triode Q4 base stage, the emitter of triode Q4 connects power supply+15V, the current collection of triode Q4
Pole is separately connected relay K4 coil one end, diode D5 cathode, and pin 3, the coil of relay K2 of photoelectrical coupler U3 is another
One end and diode D5 anode are all connected with ground.
Embodiment two, on the basis of example 1, the charging and discharging state differentiate that circuit passes through model YXD-3006
Accumulator internal resistance tester real-time detection electric vehicle accumulator internal resistance (according to electric vehicle accumulator internal resistance in charge and discharge
The characteristic changed in journey differentiates charge and discharge, in specific charging process internal resistance from large to small, otherwise the increased characteristic of internal resistance), inspection
Internal resistance is equivalent to resistance R0 after survey, and the bleeder circuit through resistance R1, resistance R0 composition converts the variation of internal resistance to the change of voltage
Change, enters the integrator that operational amplifier AR1, resistance R2, resistance R3, resistance R4, capacitor C1 are formed later and calculate voltage change
Rate exports the corresponding voltage signal of internal resistance change rate of certain time, and integrator output voltage signal=1/ resistance R2 is multiplied by electricity
Hold bleeder circuit voltage (t) dt of C1 ∫ integrator input, the internal resistance change rate of certain time is by integration time constant, that is, resistance
The value size decision of R2, capacitor C1, resistance R4 are feedback resistance, and voltage change ratio is timing, diode D1 conducting, through diode
After D3 clipping, the emitter output of driving triode Q1 conducting, triode Q1 is corresponding with accumulator of electric car charged state
High level, when voltage change ratio is negative, ground, capacitor C2, diode D2, voltage change ratio negative signal constitute returning for current flowing
Road, triode Q2 conducting, the emitter output low level corresponding with accumulator of electric car discharge condition of triode Q2, high/
The accumulator of electric car that the same or door chip U1 that low level enters model DM5486 later is exported with battery control unit fills
Discharge signal carries out same or logic judgment, and (triode Q1 or Q2 output are all high level with battery control unit output when consistent
Or when low level), differentiate accumulator of electric car state, same or door chip U1 pin 3 exports high level, pulls up through resistance R5
Afterwards, driving triode Q5 is connected, and relay K3 coil obtains electric, normally opened contact K3-1 closure, permission triode Q1 or Q2 output
High/low level enters photoelectrical coupler interlocking driving circuit, and the accumulator internal resistance tester including model YXD-3006 is real-time
One end of the equivalent resistance R0 of the electric vehicle accumulator internal resistance of detection, resistance R0 connect power supply+5V, the other end point of resistance R0
Not Lian Jie one end of ground resistance R1, resistance R2 one end, the other end of resistance R2 is separately connected the reverse phase of operational amplifier AR1
Input terminal, one end of resistance R4, capacitor C1 one end, the other end of resistance R4 is separately connected the other end of capacitor C1, operation is put
The cathode of the output end of device AR1, the anode of diode D1, diode D2, the non-inverting input terminal of operational amplifier AR1 pass through electricity greatly
Hinder R3 connection, the cathode of diode D1 be separately connected the anode of diode D2, the anode of diode D3, ground capacity C2 one
End, the base stage of triode Q1, the base stage of triode Q2, the collector of triode Q1 connect power supply+5V with the cathode of diode D3,
The collector of triode Q2 connects ground, and the emitter of triode Q1 connects same or door chip U1 draw with the emitter of triode Q2
Foot 1, same or door chip U1 pin 2 connect the accumulator of electric car charge and discharge electric signal of battery control unit output, same or door
The other end of one end of the base stage of the 3 connecting triode Q5 of pin of chip U1, resistance R10, resistance R10 connects power supply+5V, three poles
The emitter of pipe Q5 connects ground, and the collector of triode Q5 is separately connected the anode of coil one end of relay K3, diode D6,
The coil other end of relay K3 connects power supply+12V with the cathode of diode D6.
Embodiment three, on the basis of example 1, the relay interlock protection circuit are used for when photoelectrical coupler is mutual
Lock driving circuit in relay K1 coil electric, relay K2 coil power-off when, the timing closing of relay K1 it is normally opened
Switch K1-1, K1-11 are closed at, and the anode and cathode of battery P1 is respectively through relay K2 normally closed switch (K2-3, K2-
31), the normal open switch (K1-1, K1-11) being closed is added to the pin 1 and pin 2 of charger H2, keeps accumulator of electric car P1 logical
Overcharge motor charging, while normally closed switch K1-3, K1-31 of relay K1 are instantaneously disconnected, cutting accumulator of electric car P1 to
The discharge loop of motor H2, similarly, when photoelectrical coupler interlocking driving circuit in relay K2 coil electric, relay K1 line
When the power-off of circle, normal open switch K2-1, K2-11 of the timing closing of relay K2 are closed at, pin 1, the pin 2 of motor H1
Closed relay K2 normally closed switch (K2-1, K2-11), relay K1 normally closed switch (K1-3, K1-31) are added to electric power storage respectively
The anode and cathode of pond P1 makes accumulator of electric car P1 discharge to motor H1, while the normally closed switch K2-3 of relay K2,
K2-31 is instantaneously disconnected, cutting accumulator of electric car P1 by charger H2 charge circuit, with this in discharge loop, charge back
Road series relay K1 normally closed switch, relay K2 normally closed switch interlock discharge loop and charge circuit again, avoid
When relay K1, relay K2 are missed while being obtained electric, charge and discharge interlock insecure problem, including battery P1, battery P1's
Anode be separately connected one end of the normally closed switch K2-3 of relay K2, relay K1 normally closed switch K1-3 one end, it is normally closed to open
One end of the timing closing switch K1-1 of the other end connection relay K1 of K2-3 is closed, the other end of timing closing switch K1-1 connects
The pin 1 of charger H2 is connect, one end of the timing closing switch K2-1 of the other end connection relay K2 of normally closed switch K1-3 is prolonged
When closure switch K2-1 other end connection motor H1 pin 1, the cathode of battery P1 is separately connected the normally closed of relay K2
One end of switch K2-31, the normally closed switch K1-31 of relay K1 one end, the other end of normally closed switch K2-31 connects relay
One end of the timing closing switch K1-11 of K1, the pin 2 of the other end connection charger H2 of timing closing switch K1-11 are normally closed
One end of the timing closing switch K2-11 of the other end connection relay K2 of switch K1-31, timing closing switch K2-11's is another
The pin 2 of one end connection motor H1.
When the present invention is specifically used, pass through the accumulator internal resistance tester real-time detection electric car of model YXD-3006
Accumulator internal resistance converts the variation of internal resistance to through bleeder circuit the variation of voltage, enters integrator later and calculates voltage change
Rate, voltage change ratio are timing, and triode Q1 conducting exports high level corresponding with accumulator of electric car charged state,
When voltage change ratio is negative, triode Q2 conducting exports low level corresponding with accumulator of electric car discharge condition, high/low
Enter after level with or door chip U1 and the accumulator of electric car charge and discharge electric signal of battery control unit output carry out with or
Logic judgment when consistent, export high level, confirms the state of accumulator of electric car, improve differentiation accumulator of electric car
The accuracy of state, driving triode Q5 conducting later, relay K3 coil obtain electric, normally opened contact K3-1 closure, three poles of permission
The high/low level of pipe Q1 or Q2 output is added to through interlocking relay K2 normally-closed contact K2-2, relay K1 normally-closed contact K1-2
The photoelectric isolating circuit of photoelectrical coupler U2, photoelectrical coupler U3 composition, specifically when receiving high level, photoelectrical coupler U2
Work is connected, triode Q3 is connected, it is electric to obtain relay K1 coil, and string is normally closed in the relay K1 of photoelectrical coupler U3 pin 2
Contact K1-2 is disconnected, if avoiding next detection signal is just the low level of triode Q2 output, and relay K1 coil comes
Not as good as power loss, relay K2 obtains electric situation and occurs, while when in order to guarantee that relay K1 coil obtains electric, relay K2 coil is not
Electric pin 2 by the high level after partial pressure through capacitor C5 feedback to photoelectrical coupler U3 can be obtained, high level is maintained to make photoelectric coupling
Device U3 does not work, and with when should receive low level, photoelectrical coupler U3 work conducting, output low level (+0V) triggers three all the way
Pole pipe Q4 conducting, obtains relay K2 coil electric, goes here and there and breaks in the relay K2 normally-closed contact K2-2 of photoelectrical coupler U2 pin 1
It opens, if avoiding next detection signal is just the high level of triode Q1 output, and relay K2 coil has little time power loss, after
Electric appliance K1 obtains electric situation and occurs, while when in order to guarantee that relay K2 coil obtains electric, relay K1 coil will not obtain it is electric, by light
Electric coupler U3 exports low level through capacitor C6 feedback to the pin 1 of photoelectrical coupler U2, and photoelectrical coupler U1 is made not work, with
This realizes interlocking, it is ensured that at any moment, permission relay K1 or relay K2 are electricly single, interlocking to improve driving signal
Reliability, when relay K1 coil electric, relay K2 coil power-off when, the normal open switch of the timing closing of relay K1
K1-1, K1-11 are closed at, battery P1 anode and cathode respectively through relay K2 normally closed switch (K2-3, K2-31), close
The normal open switch (K1-1, K1-11) of conjunction is added to the pin 1 and pin 2 of charger H2, and accumulator of electric car P1 is made to pass through charging
Machine charging, while normally closed switch K1-3, K1-31 of relay K1 are instantaneously disconnected, and cut off accumulator of electric car P1 to motor H2
Discharge loop, similarly, when in photoelectrical coupler interlocking driving circuit relay K2 coil it is electric, relay K1 coil disconnected
When electric, normal open switch K2-1, K2-11 of the timing closing of relay K2 are closed at, and pin 1, the pin 2 of motor H1 passes through respectively
Relay K2 normally closed switch (K2-1, K2-11), the relay K1 normally closed switch (K1-3, K1-31) of closure are added to battery P1's
Anode and cathode make accumulator of electric car P1 discharge to motor H1, while normally closed switch K2-3, K2-31 wink of relay K2
When disconnect, cutting accumulator of electric car P1 by charger H2 charge circuit, with this discharge loop, charge circuit series connection after
Electric appliance K1 normally closed switch, relay K2 normally closed switch interlock discharge loop and charge circuit again, are avoided that relay
When K1, relay K2 are missed while being obtained electric, charge and discharge interlock insecure problem.
Claims (3)
1. a kind of charge and discharge double interlock control circuit of electric car, including charging and discharging state differentiate circuit, photoelectrical coupler
Interlock driving circuit, relay interlock protection circuit, which is characterized in that the charging and discharging state differentiates that circuit passes through model
The accumulator internal resistance tester real-time detection electric vehicle accumulator internal resistance of YXD-3006, is equivalent to resistance R0, through resistance R1, electricity
The bleeder circuit of resistance R0 composition converts the variation of internal resistance to the variation of voltage, and entering operational amplifier AR1 later is core
Integrator calculates voltage change ratio, difference driving triode Q1/ triode Q2 conducting, output when voltage change ratio is positive/negative
High/low level corresponding with accumulator of electric car charged state/discharge condition, it is single into same or door chip U1 and battery control
The accumulator of electric car charge and discharge electric signal of member output carries out same or logic judgment, when consistent, differentiates accumulator of electric car shape
State, exports high level, and relay K3 coil obtains electric, normally opened contact K3-1 closure, the photoelectrical coupler interlocking driving circuit warp
The normally opened contact K3-1 of closure receives the high/low level of triode Q1/ triode Q2 output, through the interlocking normally closed touching of relay K2
Point K2-2, relay K1 normally-closed contact K1-2 are added to the photoelectric isolating circuit of photoelectrical coupler U2, photoelectrical coupler U3 composition, when
When receiving high/low level, photoelectrical coupler U2/U3 work exports high/low level, and trigger triode Q3/Q4 is connected all the way, makes
Relay K1/K2 coil obtains electric, while feeding back high/low level to photoelectrical coupler U3/U2 input terminal, relay K1 normally-closed contact
K1-2/ relay K2 normally-closed contact K2-2 disconnects charging and discharging state and differentiates the high/low level that circuit is sent, and is realized mutually with this
Lock, it is ensured that relay K1 and relay K1 can only be single electric, and the relay interlock protection circuit passes through corresponding relay K1
Timing closing switch K1-1 and K1-11, normally closed switch K1-3 and K1-31 and relay K2 timing closing switch K2-1 and K2-
11, the interlocking action of normally closed switch K2-3 and K2-31 realizes that accumulator of electric car is charged/discharged by motor by charger
Interlock protection；
The photoelectrical coupler interlocking driving circuit includes relay K3 normally opened contact K3-1, relay K3 normally opened contact K3-1's
The other end of the emitter of one end connecting triode Q1, relay K3 normally opened contact K3-1 is separately connected relay K2 normally-closed contact
One end of K2-2, relay K1 closed contact K12 one end, the other end of relay K2 normally-closed contact K2-2 is separately connected photoelectricity coupling
The base stage of the pin 1 of clutch U2, triode Q4, the pin 2 of photoelectrical coupler U2 connect ground, and the pin 4 of photoelectrical coupler U2 is logical
Cross resistance R5 connection power supply+15V, photoelectrical coupler U2 pin 3 be separately connected the cathode of voltage-stabiliser tube Z1, resistance R6 one end,
One end of capacitor C3, triode Q3 base stage, the anode of voltage-stabiliser tube Z1, the other end of resistance R6, the other end of capacitor C3, three poles
The emitter of pipe Q3 is all connected with ground, and the collector of triode Q3 is separately connected relay K1 coil one end, diode D4 anode, after
The coil other end of electric appliance K1 connects power supply+15V, the other end difference of relay K1 normally-closed contact K1-2 with diode D4 cathode
Connect the base stage of the pin 2 of photoelectrical coupler U3, triode Q3, the pin 1 of photoelectrical coupler U3 by resistance R7 connection power supply+
5V, the pin 4 of photoelectrical coupler U3 are separately connected the base stage of one end of resistance R8, triode Q4, and the emitter of triode Q4 connects
Power supply+15V is met, the collector of triode Q4 is separately connected relay K4 coil one end, diode D5 cathode, photoelectrical coupler U3
Pin 3, relay K2 the coil other end and diode D5 anode be all connected with ground.
2. a kind of charge and discharge double interlock control circuit of electric car as described in claim 1, which is characterized in that described to fill
Discharge condition differentiates that circuit includes the accumulator of electric car of the accumulator internal resistance tester real-time detection of model YXD-3006
One end of the equivalent resistance R0 of internal resistance, resistance R0 connect power supply+5V, and the other end of resistance R0 is separately connected the one of ground resistance R1
End, resistance R2 one end, the other end of resistance R2 be separately connected the inverting input terminal of operational amplifier AR1, resistance R4 one end,
One end of capacitor C1, the other end of resistance R4 are separately connected the other end of capacitor C1, the output end of operational amplifier AR1, two poles
The cathode of the anode of pipe D1, diode D2, the non-inverting input terminal of operational amplifier AR1 by resistance R3 connection, diode D1
Cathode be separately connected the anode of diode D2, the anode of diode D3, one end of ground capacity C2, triode Q1 base stage,
The base stage of triode Q2, the collector of triode Q1 connect power supply+5V with the cathode of diode D3, and the collector of triode Q2 connects
Ground connection, the emitter of triode Q1 connects same or door chip U1 pin 1 with the emitter of triode Q2, same or door chip U1
Pin 2 connects the accumulator of electric car charge and discharge electric signal of battery control unit output, same or door chip U1 connection of pin 3 three
One end of the base stage of pole pipe Q5, resistance R10, the other end of resistance R10 connect power supply+5V, and the emitter of triode Q5 connects ground,
The collector of triode Q5 is separately connected the anode of coil one end of relay K3, diode D6, and the coil of relay K3 is another
End connects power supply+12V with the cathode of diode D6.
3. a kind of charge and discharge double interlock control circuit of electric car as described in claim 1, which is characterized in that it is described after
Electric appliance interlock protection circuit includes battery P1, and the anode of battery P1 is separately connected the one of the normally closed switch K2-3 of relay K2
It holds, one end of the normally closed switch K1-3 of relay K1, the timing closing of the other end connection relay K1 of normally closed switch K2-3 is opened
Close one end of K1-1, the pin 1 of the other end connection charger H2 of timing closing switch K1-1, the other end of normally closed switch K1-3
Connect one end of the timing closing switch K2-1 of relay K2, the pin of the other end connection motor H1 of timing closing switch K2-1
1, the cathode of battery P1 is separately connected the normally closed switch K1-31 of one end of the normally closed switch K2-31 of relay K2, relay K1
One end, one end of the timing closing switch K1-11 of the other end connection relay K1 of normally closed switch K2-31, timing closing opens
The pin 2 of the other end connection charger H2 of K1-11 is closed, the delay of the other end connection relay K2 of normally closed switch K1-31 is closed
One end of combination switch K2-11, the pin 2 of the other end connection motor H1 of timing closing switch K2-11.
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| CN201910153574.5A CN109638932A (en) | 2019-02-28 | 2019-02-28 | A kind of charge and discharge double interlock control circuit of electric car |
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| CN201910153574.5A CN109638932A (en) | 2019-02-28 | 2019-02-28 | A kind of charge and discharge double interlock control circuit of electric car |
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| CN109638932A true CN109638932A (en) | 2019-04-16 |
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| CN110426314A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | On-line sampling check-up gas density electrical relay with defencive function |
| CN110722567A (en) * | 2019-11-04 | 2020-01-24 | 郑州工程技术学院 | Emergency stop circuit for robot capable of preventing mistaken collision |
| CN111124029A (en) * | 2019-12-25 | 2020-05-08 | 北京机电工程研究所 | External switch power-on and power-off control circuit and method thereof |
| CN111357166A (en) * | 2019-07-23 | 2020-06-30 | 深圳欣锐科技股份有限公司 | Charging and discharging interface electrical separation circuit and vehicle-mounted charger |
| CN111431235A (en) * | 2020-04-09 | 2020-07-17 | 深圳市景方盈科技有限公司 | New energy battery management system and electric automobile |
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| CN113472041A (en) * | 2021-07-02 | 2021-10-01 | 中车株洲电力机车有限公司 | Rail transit vehicle and energy storage system and control method thereof |
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Application publication date: 20190416 |