CN203422413U - Circuit and system for electric vehicle conduction type charging guide signal detection - Google Patents
Circuit and system for electric vehicle conduction type charging guide signal detection Download PDFInfo
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- CN203422413U CN203422413U CN201320320357.9U CN201320320357U CN203422413U CN 203422413 U CN203422413 U CN 203422413U CN 201320320357 U CN201320320357 U CN 201320320357U CN 203422413 U CN203422413 U CN 203422413U
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Abstract
The utility model discloses a circuit and system for electric vehicle conduction type charging guide signal detection. The circuit includes a PWM signal isolation detection unit which is used for isolation and detection of a first PWM signal, a cable capacity isolation detection unit which is used to detect a charging cable capacity, an interface connection isolation detection unit which is used for detecting whether a vehicle interface and a charging device are fully connected, a processing unit which is used for connecting each unit and determining a preparation state of each unit and outputting a control signal, and a PWM isolation control unit which receives the control signal to control a peak voltage of a detection point of the vehicle interface so as to judge whether the vehicle is ready and can be charged. With the above method, in the utility model, the conduction type charging guide signal can be isolated and detected, the interference can be effectively avoided, the reliable operation of the charging system is ensured, the circuit structure is simple, and the low price is realized.
Description
Technical field
The utility model relates to charging electric vehicle control field, particularly relates to a kind of electric automobile conduction-type charging pilot detection circuit and system.
Background technology
At present, problem of environmental pollution is more and more serious, and various new-energy automobiles arise at the historic moment.Electric automobile becomes as a kind of new-energy automobile the focus that people pay close attention to day by day.
Electric automobile, before charging, first needs to confirm whether the vehicle interface of electric automobile is normally connected with charging equipment.If vehicle interface is not normally connected but and still charges with charging equipment, easily cause the waste of the energy, sometimes even can cause danger.Electric automobile also needs to monitor in real time charging process when charging, power-off immediately while there are abnormal conditions.Therefore electric automobile is generally equipped with charging pilot signal testing circuit.Existing charging pilot signal testing circuit can effectively guarantee carrying out smoothly of charging process, but the charging control signal testing circuit of prior art is owing to not adopting isolation detection, easily produces and disturbs, and even sometimes can cause error detection.And the charging pilot signal testing circuit of prior art, due to the devices such as operational amplifier and linear optical coupling that adopt, causes circuit structure complicated more, and its cost compare is high.
Therefore, need to provide a kind of electric automobile conduction-type charging pilot detection circuit and system, to address the above problem.
Utility model content
The technical matters that the utility model solves is, provide a kind of circuit structure succinct, cheap electric automobile conduction-type charging pilot detection circuit and system, realize conduction-type charging steering signal carried out to isolation detection, effectively avoid interference, guarantee charging system reliability service.
For solving the problems of the technologies described above, the utility model provides a kind of electric automobile conduction-type charging pilot detection circuit, be connected with vehicle interface, it comprises: pwm signal isolation detection unit, cable capacity isolation detection unit, interface connect isolation detection unit, processing unit and pwm signal isolated controlling unit.Pwm signal isolation detection unit is for isolating and detect the first pwm signal that vehicle interface provides and exporting the second pwm signal.Cable capacity isolation detection unit is for the charging cable capacity of the connection confirmation signal testing circuit that provides according to vehicle interface.Interface connects isolation detection unit for whether being connected completely with charging equipment according to connecting confirmation signal detection vehicle interface.Processing unit is connected respectively isolation detection unit and connects with pwm signal isolation detection unit, cable capacity isolation detection unit and interface, be used for the standby condition that receives the connection status of described charging cable capacity and described vehicle interface and judge each unit, export control signal to control described pwm signal isolated controlling unit.Pwm signal isolated controlling unit is connected with processing unit and pwm signal isolation detection unit, for receiving the control signal of described processing unit output, control the crest voltage at the check point place of described vehicle interface, whether ready to judge vehicle, can charge.
Wherein, pwm signal isolated controlling unit comprises: resistance R 2, resistance R 3, resistance R 4 and relay U1.R4 first termination first reference voltage of resistance, the second end of resistance R 4 connects the first end of relay U1, the second end of relay U1 connects processing unit as input, the first termination first of the 3rd end of relay U1 and resistance R 3 is with reference to ground, the first end of the 4th end contact resistance R2 of relay U1, the second end of the second end of resistance R 2 and resistance R 3 connects pwm signal isolation detection unit.
Wherein, pwm signal isolation detection unit comprises: diode D1, capacitor C 1, diode D2, resistance R 5, transistor Q1 and resistance R 6.The just very input end of diode D1, receive the first pwm signal, the negative pole of diode D1 connects the first end of capacitor C 1, the second end of capacitor C 1 connects negative pole, the first end of resistance R 6 and the 3rd end of transistor Q1 of diode D2, the second termination second of the second end of the positive pole of diode D2, resistance R 6 and transistor Q1 is with reference to ground, the first end of the first end contact resistance R5 of transistor Q1, and export the second pwm signal to processing unit, second termination the first reference voltage of resistance R 5.
Wherein, cable capacity isolation detection unit comprises: resistance R 7, resistance R 8, transistor Q2, relay U2, resistance R 9 and resistance R 10.Resistance R 7 first end inputs connect confirmation signal, the first end of resistance R 7 second end contact resistance R8 and the 3rd end of transistor Q2, the second end of resistance R 8 and the second end of transistor Q2 connect the second reference voltage, the first end of resistance R 9 connects the first end of relay U2, the second termination first of resistance R 9 is with reference to ground, the second end of relay U2 connects the first end of transistor Q2, the 3rd termination second of relay U2 is with reference to ground, the first end of the 4th end contact resistance R10 of relay U2, and connect processing unit as output, second termination the first reference voltage of resistance R 10.
Wherein, interface connection isolation detection unit comprises: diode D3, resistance R 11, resistance R 12, transistor Q3, relay U3, resistance R 13 and resistance R 14.The just very input of diode D3, receive and connect confirmation signal, the first end of the negative pole contact resistance R11 of diode D3, the first end of the second end contact resistance R12 of resistance R 11 and the 3rd end of transistor Q3, second termination the second reference voltage of the second end of resistance R 12 and transistor Q3, the first termination first of resistance R 13 is with reference to ground, the second end of resistance R 13 connects the first end of relay U3, the second end of relay U3 connects the first end of transistor Q3, the 3rd termination second of relay U3 is with reference to ground, the first end of the 4th end contact resistance R14 of relay U3, and connect processing unit as output, second termination the first reference voltage of resistance R 14.
Wherein, processing unit is embedded processing unit, communicates to represent to charge ready by communication bus and charging equipment, can charge.
Wherein, diode D2 be in stabilivolt or unidirectional Transient Voltage Suppressor or schottky diode or general-purpose diode any.
Wherein, transistor Q3 is that metal-oxide-semiconductor or triode relay U3 are photoelectric relay or photoelectrical coupler.
For solving the problems of the technologies described above, the utility model also provides a kind of electric automobile conduction-type charging pilot detection system, comprise above-mentioned electric automobile conduction-type charging pilot detection circuit and vehicle interface, vehicle interface is connected with electric automobile conduction-type charging pilot detection circuit, be used for exporting the first pwm signal and connection confirmation signal whether ready to judge vehicle to electric automobile conduction-type charging pilot detection circuit, can charge.
Wherein, vehicle interface also comprises switch S 3 and resistance R C, and switch S 3 first terminations first are with reference to ground, the first end of the second end contact resistance RC of switch S 3, the second end stube cable capacity isolation detection unit of resistance R C and interface connect isolation detection unit, for exporting connection confirmation signal.
Pass through such scheme, the beneficial effects of the utility model are: by the pwm signal of pwm signal isolation detection cell isolation and testing circuit, by the charging cable capacity of cable capacity isolation detection cell isolation and testing circuit and the connection status that is connected isolation detection cell isolation and detection vehicle interface and charging equipment by interface, and be transferred to processing unit with output control signal to PWM isolated controlling unit, control the crest voltage at the check point place of vehicle interface, whether ready to judge vehicle, can charge, can realize conduction-type charging steering signal is carried out to isolation detection, effectively avoid interference, guarantee charging system reliability service, circuit structure is succinct, cheap.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model electric automobile conduction-type charging pilot detection system preferred embodiment;
Fig. 2 is the structural representation of the utility model electric automobile conduction-type charging pilot detection circuit preferred embodiment;
Equivalent circuit structure schematic diagram when Fig. 3 is the utility model electric automobile conduction-type charging pilot detection circuit DC charging.
Embodiment
Refer to Fig. 1, Fig. 1 is the structural representation of the utility model electric automobile conduction-type charging pilot detection system preferred embodiment.As shown in Figure 1, electric automobile conduction-type charging pilot detection system is preferably and comprises vehicle interface 10 and electric automobile conduction-type charging pilot detection circuit 20.Vehicle interface 10 is connected with electric automobile conduction-type charging pilot detection circuit 20, to export the first pwm signal CP and to connect confirmation signal CC to electric automobile conduction-type charging pilot detection circuit 20, the electric automobile conduction-type charging pilot detection circuit 20 judgement charging cable capacity of the state according to these two signals and vehicle interface connection status, and then whether the crest voltage at the check point A place of control vehicle interface 10 is ready to judge vehicle, can charge.
In the present embodiment, vehicle interface 10 comprises switch S 3 and resistance R C, and switch S 3 first terminations first are with reference to ground EGND, the first end of the second end contact resistance RC of switch S 3.The second end connecting electric automobile conduction-type charging pilot detection circuit 20 of resistance R C, connects confirmation signal CC with the standby condition of judgement charging cable capacity and vehicle for exporting.Resistance R C and normally closed switch S3 are integrated in Vehicular charging plug, and when the resistance of resistance R C is 680 Ω, charging cable capacity is 16A; When the resistance of resistance R C is 220 Ω, charging cable capacity is 32A.Wherein, in the present embodiment, the first reference ground with reference to ground be preferably-12V of EGND, is also vehicle body ground.Vehicle interface 10 is preferably the electric automobile conduction-type charging inlet that meets national standard, for example, and existing national standard: " GB/T20234.1,2,3-2011: electric automobile conduction chargeable connection device ".
Refer to Fig. 2, Fig. 2 is the structural representation of the utility model electric automobile conduction-type charging pilot detection circuit preferred embodiment.As shown in Figure 2, electric automobile conduction-type charging pilot detection circuit 20 comprises: pwm signal isolation detection unit 200, pwm signal isolated controlling unit 201, cable capacity isolation detection unit 202, interface connect isolation detection unit 203 and processing unit 204.Wherein, processing unit 204 is connected respectively isolation detection unit 203 and connects with pwm signal isolation detection unit 200, cable capacity isolation detection unit 202 and interface, pwm signal isolated controlling unit 201 is connected with processing unit 204 and pwm signal isolation detection unit 200.The first pwm signal CP that 200 isolation of pwm signal isolation detection unit and detection vehicle interface 10 provide also exports the second pwm signal PWM_DET.The charging cable capacity of the connection confirmation signal CC testing circuit that cable capacity isolation detection unit 202 provides according to vehicle interface 10.Whether interface connects isolation detection unit 203 and is connected completely with charging equipment (not shown) according to connecting confirmation signal CC detection vehicle interface 10.Processing unit 204 is embedded processing unit, judges the standby condition of each unit, and export control signal CP_CON according to the connection status of the second pwm signal PWM_DET, charging cable capacity and the vehicle interface 10 that receive.Whether pwm signal isolated controlling unit 201 reception control signal CP_CON control the crest voltage at check point A place of vehicle interface 10 ready to judge vehicle, can charge.
In the present embodiment, pwm signal isolated controlling unit 201 comprises: resistance R 2, resistance R 3, resistance R 4 and relay U1.The R4 first termination first reference voltage VCC of resistance, the second end of resistance R 4 connects the first end of relay U1.The second end of relay U1 connects processing unit 204 as input, and the first termination first of the 3rd end of relay U1 and resistance R 3 is with reference to ground EGND, the first end of the 4th end contact resistance R2 of relay U1.The second end of the second end of resistance R 2 and resistance R 3 connects pwm signal isolation detection unit 200.
Pwm signal isolation detection unit 200 comprises: diode D1, capacitor C 1, diode D2, resistance R 5, transistor Q1 and resistance R 6.In the present embodiment, transistor Q1 is preferably metal-oxide-semiconductor Q1, and the first end of transistor Q1 is drain electrode, and the second end is source electrode, and the 3rd end is grid, and in other embodiments, transistor Q1 can be also triode.The input end of the just very pwm signal isolation detection unit 200 of diode D1, receives the first pwm signal CP, and the negative pole of diode D1 connects the first end of capacitor C 1.The second end of capacitor C 1 connects negative pole, the first end of resistance R 6 and the grid of metal-oxide-semiconductor Q1 of diode D2.The second end of the positive pole of diode D2, resistance R 6 and the source electrode of metal-oxide-semiconductor Q1 connect second with reference to ground BGND.The first end of the drain electrode contact resistance R5 of metal-oxide-semiconductor Q1, and export the second pwm signal PWM_DET to processing unit 204, second termination the first reference voltage VCC of resistance R 5.Wherein, second is the reference ground of processing unit 204 with reference to ground BGND.In the present embodiment, diode D1 is preferably general-purpose diode, and diode D2 can be also that schottky diode or other possess the semiconductor devices of one-way conduction characteristic in other embodiments.In the present embodiment, diode D2 is preferably stabilivolt, and in other embodiments, diode D2 can be also unidirectional TVS(Transient Voltage Suppressor, Transient Voltage Suppressor), schottky diode, general-purpose diode or other diodes.
Cable capacity isolation detection unit 202 comprises: resistance R 7, resistance R 8, transistor Q2, relay U2, resistance R 9 and resistance R 10.In the present embodiment, transistor Q2 is preferably metal-oxide-semiconductor Q2, and the first end of transistor Q2 is drain electrode, and the second end is source electrode, and the 3rd end is grid, and in other embodiments, transistor Q2 can be also triode.The second end of resistance R 7 first end contact resistance RC, be that resistance R 7 first end inputs connect confirmation signal CC, resistance R 7 second first ends of end contact resistance R8 and the grid of metal-oxide-semiconductor Q2, the second end of resistance R 8 and the source electrode of metal-oxide-semiconductor Q2 connect the second reference voltage VSS, the first end of resistance R 9 connects the first end of relay U2, the second termination first of resistance R 9 is with reference to ground EGND, the second end of relay U2 connects the drain electrode of metal-oxide-semiconductor Q2, the 3rd termination second of relay U2 is with reference to ground BGND, the first end of the 4th end contact resistance R10 of relay U2, and connect processing unit 204 as output, second termination the first reference voltage VCC of resistance R 10.In the present embodiment, the low level of the second be preferably-12V of reference voltage VSS.
Interface connects isolation detection unit 203 and comprises: diode D3, resistance R 11, resistance R 12, transistor Q3, relay U3, resistance R 13 and resistance R 14.In the present embodiment, transistor Q3 is preferably metal-oxide-semiconductor Q3, and the first end of transistor Q3 is drain electrode, and the second end is source electrode, and the 3rd end is grid, and in other embodiments, transistor Q3 can be also triode.The just very input of diode D3, the second end of contact resistance RC, receive and connect confirmation signal CC, the first end of the negative pole contact resistance R11 of diode D3, the second first end of end contact resistance R12 and the grid of metal-oxide-semiconductor Q3 of resistance R 11, the second end of resistance R 12 and the source electrode of metal-oxide-semiconductor Q3 meet the second reference voltage VSS, the first termination first of resistance R 13 is with reference to ground EGND, the second end of resistance R 13 connects the first end of relay U3, the second end of relay U3 connects the drain electrode of metal-oxide-semiconductor Q3, the 3rd termination second of relay U3 is with reference to ground BGND, the first end of the 4th end contact resistance R14 of relay U3, and connect processing unit 204 as output, second termination the first reference voltage VCC of resistance R 14.
In the present embodiment, relay U1, relay U2 and relay U3 are photoelectrical coupler or photoelectric relay, processing unit 204 is with MCU(Micro Control Unit, micro-control unit) or CPU(Central Processing Unit, central processing unit) or ARM(Acorn Reduced Instruction Set Computer Machine, reduced instruction set computer microprocessor) etc. processor and embedded software thereof are core, its peripheral circuit is flexible configuration as required, analog to digital converter if necessary, communication controlers etc. all belong to the common configuring technical of embedded system.
The specific works principle of electric automobile conduction-type charging pilot detection circuit 20 is below described in detail in detail:
Vehicle needs vehicle interface 10 to be connected with charging equipment when charging.When initial, vehicle interface 10 is not connected completely with charging equipment, vehicle interface 10 is without the first pwm signal CP and is connected confirmation signal CC and inputs the electric automobile conduction-type pilot detection circuit 20 that charges, transistor Q1, transistor Q2 and transistor Q3 are all in off state, relay U2 and relay U3 are all in cut-off state, and pwm signal isolation detection unit 200, cable capacity isolation detection unit 202 and interface connect isolation detection unit 203 this 3 road detection signal PWM_DET, CUR_DET and CC_DET is all pulled to high level VCC.Now, processing unit 204 output control signal CP_CON are high level, thereby relay U1 is also in cut-off state, shows that vehicle is not ready for, and can not charge.
When vehicle interface 10 is connected completely with charging equipment, couple together, and the two level is EGND vehicle body ground EGND and charging equipment.Vehicle interface 10 outputs connect confirmation signal CC to the interface connection isolation detection unit 203 of electric automobile conduction-type charging pilot detection circuit 20.Switch S 3 is normally closed closes, first forms path with reference to ground EGND by switch S 3, resistance R C, diode D3, resistance R 11 and resistance R 12, and produce dividing potential drop at resistance R 12 places, value by configuration resistance R 11 and resistance R 12 can obtain suitable dividing potential drop at resistance R 12 two ends makes the complete conducting of metal-oxide-semiconductor Q3, thereby relay U3 conducting, the output signal CC_DET that makes interface connect isolation detection unit 203 is pulled down to low level, after processing unit 204 detects CC_DET and is low level, illustrate that vehicle interface 10 is connected completely with charging equipment.
Meanwhile, vehicle interface 10 outputs connect confirmation signal CC to the cable capacity isolation detection unit 202 of electric automobile conduction-type charging pilot detection circuit 20, first forms path with reference to ground EGND by switch S 3, resistance R C, resistance R 7 and resistance R 8, and produce dividing potential drop at resistance R 8 places, by configuration resistance R 7 and resistance R 8, can obtain suitable dividing potential drop at resistance R 8 two ends, and then control conducting and the cut-off of metal-oxide-semiconductor Q2 and relay U2.When the value of resistance R C is 680 Ω, the dividing potential drop that resistance R 8 produces is less than the threshold voltage of metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 cut-off, relay U2 cut-off, the output signal CUR_DET of cable capacity isolation detection unit 202 is pulled to high level by resistance R 10, therefore if CUR_DET to be detected be low level and CC_DET to be detected be high level to processing unit 204, represent that resistance R C resistance is 680 Ω, charging cable capacity is 16A.Similarly, when the value of resistance R C is 220 Ω, the dividing potential drop that path produces in resistance R 8 is greater than the threshold voltage of metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 conducting, relay U2 conducting, the output signal CUR_DET of cable capacity isolation detection unit 202 is pulled down to low level, if therefore processing unit 204 CC_DET to be detected be low level and CUR_DET to be detected be low level, represent that resistance R C resistance is 220 Ω, charging cable capacity is 32A.
When vehicle interface 10 is normally connected with charging equipment, pwm signal isolation detection unit 200 also isolates and detects the first pwm signal CP that vehicle interface 10 provides and exports the second pwm signal PWM_DET.Particularly, when the first pwm signal CP peak value be+during 12V, diode D1 forward conduction, the voltage at capacitor C 1 two ends can not suddenly change, therefore the metal-oxide-semiconductor Q1 grid level about 12V that also rises, voltage difference between grid and source electrode surpasses the threshold voltage of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 conducting, and the second pwm signal PWM_DET of pwm signal isolation detection unit 200 outputs is pulled down to low level.When the first pwm signal CP valley be-during 12V, diode D1 oppositely ends, the grid level of the metal-oxide-semiconductor Q1 about 12V that declines, and the voltage difference between grid and source electrode is less than threshold voltage, metal-oxide-semiconductor Q1 cut-off, the second pwm signal PWM_DET of pwm signal isolation detection unit 200 outputs is pulled to high level.Said process goes round and begins again to realize the isolation transmission of pwm signal.Wherein, the effect of resistance R 6 is to the electric charge of the grid of metal-oxide-semiconductor Q1 and source electrode accumulation, to provide bleed-off circuit when metal-oxide-semiconductor Q1 ends; And the effect of diode D2 is mainly fast the source potential of metal-oxide-semiconductor Q1 to be clamped to the grid potential of metal-oxide-semiconductor Q1 left and right when metal-oxide-semiconductor Q1 ends, thereby make metal-oxide-semiconductor Q1 turn-off fast.
After metal-oxide-semiconductor Q1 conducting, the second pwm signal PWM_DET is pulled down to low level, processing unit 204 detects the second pwm signal PWM_DET and after low level, illustrates that vehicle interface 10 is connected completely with charging equipment, charging equipment self check completes does not have fault and electric battery (not shown) when chargeable state, by the control signal CP_CON of controlled processing unit 204 outputs, it is low level, thereby make relay U1 conducting, make resistance R 2 and resistance R 3 parallel connections, represent that vehicle is ready, can charge.
In the present embodiment, the second pwm signal PWM_DET and the first pwm signal CP are anti-phase, therefore processing unit 204 needs inside to do anti-phase processing when calculating PWM dutycycle, or, before the second pwm signal PWM_DET input processing unit 204, increase the signal homophase that a phase inverter guarantees that the first pwm signal CP and processing unit 204 obtain, so, inside does not just need to do anti-phase processing.
Refer to Fig. 3, equivalent circuit structure schematic diagram when Fig. 3 is the utility model electric automobile conduction-type charging pilot detection circuit DC charging.As shown in Figure 3, during DC charging, vehicle interface access direct supply, the interface that equivalent electrical circuit during electric automobile conduction-type charging pilot detection circuit 20 DC charging only need to be used in the utility model electric automobile conduction-type charging pilot detection circuit preferred embodiment connects isolation detection unit 203 and processing unit 204.Processing unit 204 communicates by communication bus and charging equipment, and judges that according to the output signal CC_DET of interface connection isolation detection unit 203 whether vehicle is ready, can charge.
As shown in Figure 3, the standard recommendation value of resistance R C is preferably 1K Ω.After vehicle connects completely, couple together vehicle body ground and charging equipment, level is first with reference to ground EGND current potential.Vehicle interface 10 will connect confirmation signal CC input direct-current charging inlet pilot detection circuit 20.First forms path with reference to ground EGND by resistance R C, diode D3, resistance R 11 and resistance R 12, and produce dividing potential drop at resistance R 12 places, value by configuration resistance R 11 and resistance R 12 can obtain suitable dividing potential drop in resistance R 12 makes metal-oxide-semiconductor Q3 conducting, thereby make relay U3 conducting, the output signal CC_DET that interface connects isolation detection unit 203 is pulled down to low level, after processing unit 204 detects CC_DET and is low level, illustrate that vehicle interface 10 connects completely.Processing unit 204 is shaken hands by having communicated by letter with charging equipment and is configured by communication bus (as CAN bus), represents that vehicle is ready, can charge.
In the present embodiment, the pwm signal of circuit 20 isolation of electric automobile conduction-type charging pilot detection and testing circuit, by the charging cable capacity of 202 isolation of cable capacity isolation detection unit and testing circuit and the connection status that is connected 203 isolation of isolation detection unit and detection vehicle interface 10 and charging equipment by interface, and be transferred to processing unit 204, processing unit 204 is according to the pwm signal receiving, charging cable capacity and vehicle interface connection status are to PWM isolated controlling unit output control signal, the crest voltage at the check point A place of vehicle interface is controlled in PWM isolated controlling unit according to the control signal receiving, and judge that whether vehicle is ready, can charge, can realize conduction-type charging steering signal is carried out to isolation detection, effectively avoid interference, guarantee charging system reliability service, circuit structure is succinct, cheap.
In sum, the utility model is by the pwm signal of 200 isolation of pwm signal isolation detection unit and testing circuit, by the charging cable capacity of 202 isolation of cable capacity isolation detection unit and testing circuit and the connection status that is connected 203 isolation of isolation detection unit and detection vehicle interface 10 and charging equipment by interface, and be transferred to processing unit 204 with output control signal to PWM isolated controlling unit, control the crest voltage at the check point A place of vehicle interface, whether ready to judge vehicle, can charge, can realize conduction-type charging steering signal is carried out to isolation detection, effectively avoid interference, guarantee charging system reliability service, circuit structure is succinct, cheap.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. an electric automobile conduction-type charging pilot detection circuit, described circuit is connected with vehicle interface, it is characterized in that, and described circuit comprises:
Pwm signal isolation detection unit, for isolating and detect the first pwm signal that described vehicle interface provides and exporting the second pwm signal;
Cable capacity isolation detection unit, the charging cable capacity of described circuit is provided for the connection confirmation signal providing according to described vehicle interface;
Whether interface connects isolation detection unit, for detecting described vehicle interface according to described connection confirmation signal, be connected completely with charging equipment;
Processing unit, be connected respectively isolation detection unit connects with described pwm signal isolation detection unit, described cable capacity isolation detection unit and described interface, be used for the standby condition that receives the connection status of described charging cable capacity and described vehicle interface and judge each unit, export control signal to control described pwm signal isolated controlling unit;
Pwm signal isolated controlling unit, be connected with described processing unit and described pwm signal isolation detection unit, for receiving the control signal of described processing unit output, control the crest voltage at the check point place of described vehicle interface, whether ready to judge vehicle, can charge.
2. circuit according to claim 1, it is characterized in that, described pwm signal isolated controlling unit comprises: resistance R 2, resistance R 3, resistance R 4 and relay U1, R4 first termination first reference voltage of described resistance, the second end of described resistance R 4 connects the first end of described relay U1, the second end of described relay U1 connects described processing unit as input, the first termination first of the 3rd end of described relay U1 and described resistance R 3 is with reference to ground, the 4th end of described relay U1 connects the first end of described resistance R 2, the second end of described resistance R 2 and the second end of described resistance R 3 connect described pwm signal isolation detection unit.
3. circuit according to claim 1, it is characterized in that, described pwm signal isolation detection unit comprises: diode D1, capacitor C 1, diode D2, resistance R 5, transistor Q1 and resistance R 6, the just very input end of described diode D1, receive described the first pwm signal, the negative pole of described diode D1 connects the first end of described capacitor C 1, the second end of described capacitor C 1 connects the negative pole of described diode D2, the 3rd end of the first end of described resistance R 6 and described transistor Q1, the positive pole of described diode D2, the second termination second of the second end of described resistance R 6 and described transistor Q1 is with reference to ground, the first end of the first end contact resistance R5 of described transistor Q1, and export the second pwm signal to described processing unit, second termination the first reference voltage of described resistance R 5.
4. circuit according to claim 1, it is characterized in that, described cable capacity isolation detection unit comprises: resistance R 7, resistance R 8, transistor Q2, relay U2, resistance R 9 and resistance R 10, described resistance R 7 first ends are inputted described connection confirmation signal, described resistance R 7 second ends connect the first end of described resistance R 8 and the 3rd end of described transistor Q2, the second end of described resistance R 8 and the second end of described transistor Q2 connect described the second reference voltage, the first end of described resistance R 9 connects the first end of described relay U2, described in the second termination of described resistance R 9, first with reference to ground, the second end of described relay U2 connects the first end of described transistor Q2, described in the 3rd termination of described relay U2, second with reference to ground, the 4th end of described relay U2 connects the first end of described resistance R 10, and connect described processing unit as output, the first reference voltage described in the second termination of described resistance R 10.
5. circuit according to claim 1, it is characterized in that, described interface connects isolation detection unit and comprises: diode D3, resistance R 11, resistance R 12, transistor Q3, relay U3, resistance R 13 and resistance R 14, the just very input of described diode D3, receive described connection confirmation signal, the negative pole of described diode D3 connects the first end of described resistance R 11, the second end of described resistance R 11 connects the first end of described resistance R 12 and the 3rd end of described transistor Q3, second termination the second reference voltage of the second end of described resistance R 12 and described transistor Q3, the first termination first of described resistance R 13 is with reference to ground, the second end of described resistance R 13 connects the first end of described relay U3, the second end of described relay U3 connects the first end of described transistor Q3, the 3rd termination second of described relay U3 is with reference to ground, the 4th end of described relay U3 connects the first end of described resistance R 14, and connect described processing unit as output, second termination the first reference voltage of described resistance R 14.
6. circuit according to claim 1, is characterized in that, described processing unit is embedded processing unit, communicates to represent to charge ready by communication bus and charging equipment, can charge.
7. circuit according to claim 3, is characterized in that, described diode D2 be in stabilivolt or unidirectional Transient Voltage Suppressor or schottky diode or general-purpose diode any.
8. circuit according to claim 5, is characterized in that, described transistor Q3 is metal-oxide-semiconductor or triode, and described relay U3 is photoelectric relay or photoelectrical coupler.
9. electric automobile conduction-type charging pilot detection system, it is characterized in that, described system comprises electric automobile conduction-type charging pilot detection circuit and the vehicle interface as described in any one in claim 1 to 8, described vehicle interface is connected with described electric automobile conduction-type charging pilot detection circuit, be used for exporting described the first pwm signal and described connection confirmation signal whether ready to judge vehicle to described electric automobile conduction-type charging pilot detection circuit, can charge.
10. system according to claim 9, it is characterized in that, described vehicle interface also comprises switch S 3 and resistance R C, described in described switch S 3 first terminations, first with reference to ground, the second end of described switch S 3 connects the first end of described resistance R C, the second end of described resistance R C connects described cable capacity isolation detection unit and described interface connects isolation detection unit, for exporting described connection confirmation signal.
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| CN201320320357.9U CN203422413U (en) | 2013-06-04 | 2013-06-04 | Circuit and system for electric vehicle conduction type charging guide signal detection |
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| CN201320320357.9U CN203422413U (en) | 2013-06-04 | 2013-06-04 | Circuit and system for electric vehicle conduction type charging guide signal detection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049173A (en) * | 2014-06-23 | 2014-09-17 | 国家电网公司 | Electric vehicle charging interface guiding recognition device |
| CN104079158A (en) * | 2014-07-08 | 2014-10-01 | 中国兵器工业集团第二一四研究所苏州研发中心 | Ultra-low static power consumption power source starting control circuit |
| CN104215810A (en) * | 2013-06-04 | 2014-12-17 | 东莞钜威新能源有限公司 | EV (electric vehicle) conductive charge guide signal detection circuit and system |
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| CN108058603A (en) * | 2016-11-07 | 2018-05-22 | 先控捷联电气股份有限公司 | Charging equipment of electric automobile |
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| EP4044397A4 (en) * | 2020-04-17 | 2023-02-22 | Jiangyin Sinbon Electronics Co., Ltd. | Adaptive charging system, charging method, and identification method |
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2013
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| CN104215810A (en) * | 2013-06-04 | 2014-12-17 | 东莞钜威新能源有限公司 | EV (electric vehicle) conductive charge guide signal detection circuit and system |
| CN104049173A (en) * | 2014-06-23 | 2014-09-17 | 国家电网公司 | Electric vehicle charging interface guiding recognition device |
| CN104079158A (en) * | 2014-07-08 | 2014-10-01 | 中国兵器工业集团第二一四研究所苏州研发中心 | Ultra-low static power consumption power source starting control circuit |
| CN104407266A (en) * | 2014-11-24 | 2015-03-11 | 重庆长安汽车股份有限公司 | Circuit for detecting current carrying capacity of charging system |
| CN104553849A (en) * | 2014-12-03 | 2015-04-29 | 安徽贵博新能科技有限公司 | Direct-current charging safety monitoring device for electric automobile |
| CN104553849B (en) * | 2014-12-03 | 2017-01-11 | 安徽贵博新能科技有限公司 | Direct-current charging safety monitoring device for electric automobile |
| CN108058603A (en) * | 2016-11-07 | 2018-05-22 | 先控捷联电气股份有限公司 | Charging equipment of electric automobile |
| CN108058603B (en) * | 2016-11-07 | 2021-02-02 | 先控捷联电气股份有限公司 | Electric automobile charging equipment |
| CN108556669A (en) * | 2018-05-09 | 2018-09-21 | 西安特锐德智能充电科技有限公司 | A kind of onboard charger and its control device |
| CN108556669B (en) * | 2018-05-09 | 2020-08-04 | 西安特锐德智能充电科技有限公司 | Vehicle-mounted charger and control device thereof |
| EP4044397A4 (en) * | 2020-04-17 | 2023-02-22 | Jiangyin Sinbon Electronics Co., Ltd. | Adaptive charging system, charging method, and identification method |
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Effective date of registration: 20160224 Address after: 523808, Guangdong District, Songshan hi tech Industrial Development Zone, Dongguan, seven industrial North Road, 1 force science and technology center, 3 floor, B District Patentee after: Dongguan Powerwise Technology Co., Ltd. Address before: 523808 productivity building, Songshan science and Technology Industrial Park, Guangdong, Dongguan Province, room 401-403 Patentee before: Dongguan PowerWise New Energy Co., Ltd. |
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