CN111452640A - Electrical charging gun homing detection circuit and method - Google Patents
Electrical charging gun homing detection circuit and method Download PDFInfo
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- CN111452640A CN111452640A CN202010283733.6A CN202010283733A CN111452640A CN 111452640 A CN111452640 A CN 111452640A CN 202010283733 A CN202010283733 A CN 202010283733A CN 111452640 A CN111452640 A CN 111452640A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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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
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a charging gun homing detection circuit and a method adopting an electrical mode, wherein a resistance between a CC1/CP contact and a PE contact of a direct current charging pile/an alternating current charging pile is utilized to generate a remote signaling signal to judge whether a charging gun is in the homing position, and meanwhile, the on-off state of an electromagnetic lock in the charging gun is detected by utilizing the change of the resistance between the CC1/CP and the PE, two paths of remote signaling signals are simultaneously judged, the homing condition of the charging gun and the on-off state of the electromagnetic lock in the charging gun are effectively detected, the stability and the reliability of a system are enhanced, the system misjudgment caused by the detection by adopting a mechanical mode can be avoided, the detection mode is not limited by the service life of a mechanical switch, the reliability of the system detection is improved, the charging gun homing detection circuit and the method can be simultaneously suitable for the direct current charging pile and the alternating current charging pile, and the.
Description
Technical Field
The invention relates to the technical field of automatic detection of electric vehicle charging piles, in particular to a charging gun homing detection circuit and method adopting an electric mode.
Background
In the design of current electric pile of filling, use mechanical system to detect whether the rifle that charges resets usually, nevertheless use mechanical system to have certain drawback, mechanical switch has certain life usually, and it is out of order then the device after reaching the limit switch number of times, and mechanical contact causes the system misjudgement easily.
Therefore, a more reliable charging gun homing detection mode is designed, and the damage rate of the charging gun is extremely reduced.
Disclosure of Invention
The invention aims to provide a charging gun homing detection circuit and method adopting an electric mode, and aims to solve the problem that system misjudgment is easily caused by a mechanical contact of a charging pile in the prior art and improve the reliability of system detection.
In order to achieve the above technical object, the present invention provides an electric homing detection circuit for a charging gun, comprising:
a contact signal input circuit, a microswitch detection circuit, a remote signaling input circuit 1 and a remote signaling input circuit 2 are arranged in the charging pile, and the microswitch detection circuit is connected with the remote signaling input circuit 2;
when the charging gun is reset, the contact signal input circuit is respectively connected with the microswitch detection circuit and the remote signaling input circuit 1;
the remote signaling input circuit 1 detects whether the charging gun is in place or not by using resistance between contacts between the contact signal input circuit and the remote signaling input circuit 1, and the remote signaling input circuit 2 detects the on-off state of an electromagnetic lock in the charging gun by using change of the resistance between the contacts between the contact signal input circuit and the remote signaling input circuit 2.
Preferably, the charging pile is a direct current charging pile or an alternating current charging pile.
Preferably, the contact signal input circuit structure is:
for the direct current charging pile, a CC1 contact is connected with resistors R1 and R2, the other end of R1 is connected with 12V voltage, the other end of R2 is connected with a microswitch S, and the other end of the microswitch S is connected with a PE contact;
for the alternating current charging pile, the contacts are a CP signal contact and a PE signal contact, the CP contact is connected with a resistor R1, the other end of the R1 is connected with a microswitch S1, the S1 is also connected with 12V voltage and PWM signals, and the PE is grounded.
Preferably, the circuit structure of the remote signaling input loop 1 is:
the contact point of CC1 is connected resistance R7, and the 1 st pin of diode VD1, electric capacity C2 and opto-coupler E1 is connected to the R7 other end, and diode VD1, electric capacity C2 and the 2 nd pin of opto-coupler E1 are connected resistance R8, and the PE contact is connected to the R8 other end, and the 4 th pin of E1 is connected EKI1 output and electric capacity C1.
Preferably, the circuit structure of the remote signaling input loop 2 is:
the CC1 contact is connected with the base of a triode Q1, the PE contact is connected with a resistor R10, the other end of R10 is connected with the emitters of a resistor R9 and a Q1, the other end of R9 is connected with 12V voltage, the collector of Q1 is connected with a diode VD2, a capacitor C3 and the 1 st pin of an optocoupler E2, the 2 nd pins of the diode VD2, the capacitor C3 and the optocoupler E2 are connected with the PE contact, and the 4 th pin of E2 is connected with the output end of the EKI2 and the capacitor C4.
Preferably, in the state that the charging gun is not reset, no potential difference exists between the CC1 contact and the PE contact, the light-emitting diode in the optocoupler E1 does not emit light, the phototriode is cut off, and the remote signaling output end is at a high level; when the charging gun is reset, the resistor between the CC1 contact and the PE contact is connected into the remote signaling input circuit 1, the resistor divides voltage, potential difference is generated at two ends of the light emitting diode, the light emitting diode emits light, the phototriode is conducted, and the remote signaling output end is at low level.
Preferably, when the electromagnetic lock of the charging gun is opened, the resistance value between the CC1 and the PE is infinite, the voltage at the CC1 end is 12V, namely the voltage at the base of the triode Q1 is 12V, the voltage at the emitter of the triode is 10V, the voltage at the emitter is lower than the voltage at the base, the triode is cut off, no signal is output to the remote signaling input loop 2, and the output end is at a high level; when the charging gun electromagnetic lock is closed, the resistance value between the CC1 and the PE is R2, the voltage at the CC1 end is 6V, the voltage of an emitter of the triode Q1 is higher than the voltage of a base electrode, the triode is conducted, a 12V voltage signal is output to the remote signaling input circuit 2, and the output end is at a low level.
The invention also provides a charging gun homing detection method realized by using the detection circuit, which comprises the following operations:
whether a resistor between a charging pile base and a contact of a charging gun is divided to generate potential difference or not is utilized, and a high level or a low level is output through the on-off of an optical coupler to judge whether the charging gun is reset or not;
the resistance value that the utilization was filled between electric pile base and the contact of the rifle that charges changes, through switching on and ending of opto-coupler, output high level or low level judge whether the rifle electromagnetic lock that charges opens.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the method and the device have the advantages that the resistance between the CC1/CP contact and the PE contact of the direct current charging pile/alternating current charging pile is utilized to generate a remote signaling signal to judge whether the charging gun is reset, meanwhile, the on-off state of the electromagnetic lock in the charging gun is detected by utilizing the change of the resistance between the CC1/CP and the PE, two paths of remote signaling signals are simultaneously judged, the reset condition of the charging gun and the on-off state of the electromagnetic lock in the charging gun are effectively detected, the stability and the reliability of the system are enhanced, the system misjudgment caused by the detection in a mechanical mode can be avoided, the detection mode is not limited by the service life of the mechanical switch, the reliability of system detection is improved, the method and the device can be simultaneously applied to the direct current charging pile and the alternating current charging pile, and the.
Drawings
Fig. 1 is a structural diagram of an electrical homing detection circuit of a charging gun according to an embodiment of the present invention;
fig. 2 is a flowchart of an electrical homing detection method for a charging gun according to an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The following describes in detail a homing detection circuit and method of an electric charging gun according to an embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, the present invention discloses an electric homing detection circuit for a charging gun, comprising:
a contact signal input circuit, a microswitch detection circuit, a remote signaling input circuit 1 and a remote signaling input circuit 2 are arranged in the charging pile, and the microswitch detection circuit is connected with the remote signaling input circuit 2;
when the charging gun is reset, the contact signal input circuit is respectively connected with the microswitch detection circuit and the remote signaling input circuit 1;
the remote signaling input circuit 1 detects whether the charging gun is in place or not by using resistance between contacts between the contact signal input circuit and the remote signaling input circuit 1, and the remote signaling input circuit 2 detects the on-off state of an electromagnetic lock in the charging gun by using change of the resistance between the contacts between the contact signal input circuit and the remote signaling input circuit 2.
For the direct-current charging pile, a CC1 contact is connected with resistors R1 and R2, the other end of R1 is connected with 12V voltage, the other end of R2 is connected with a microswitch S, the other end of the microswitch S is connected with a PE contact, when the contact is closed, a CC1 signal and a PE signal in the charging gun are collected and accessed into a remote signaling input loop, and when the contact is disconnected, no signal is accessed into the remote signaling input loop.
The remote signaling input loop comprises two paths of remote signaling input loops.
The remote signaling input loop 1 has the circuit structure that:
the contact point of CC1 is connected resistance R7, and the 1 st pin of diode VD1, electric capacity C2 and opto-coupler E1 is connected to the R7 other end, and the 2 nd pin connecting resistance R8 of diode VD1, electric capacity C2 and opto-coupler E1, and the PE contact is connected to the R8 other end, and the 4 th pin of E1 connects EKI1 output and electric capacity C1.
The remote signaling input loop 2 has the circuit structure that:
the CC1 contact is connected with the base of a triode Q1, the PE contact is connected with a resistor R10, the other end of R10 is connected with the emitters of a resistor R9 and a Q1, the other end of R9 is connected with 12V voltage, the collector of Q1 is connected with a diode VD2, a capacitor C3 and the 1 st pin of an optocoupler E2, the 2 nd pins of the diode VD2, the capacitor C3 and the optocoupler E2 are connected with the PE contact, and the 4 th pin of E2 is connected with the output end of the EKI2 and the capacitor C4.
Whether the charging gun is in place or not is detected through a remote signaling input loop 1, no potential difference exists between a CC1 contact and a PE contact when the charging gun is not in a reset state, a light emitting diode in an optocoupler E1 does not emit light, a phototriode is cut off, and the remote signaling output end is at a high level; when the charging gun is reset, the resistor between the CC1 contact and the PE contact is connected into the remote signaling input circuit 1, the resistor divides voltage, potential difference is generated at two ends of the light emitting diode, the light emitting diode emits light, the phototriode is conducted, and the remote signaling output end is at low level. Through the circuit, whether the charging gun is returned or not is judged by generating a remote signaling signal by using the resistance between the CC1 and the PE contact.
The on-off state of an electromagnetic lock in the charging gun is detected through a remote signaling input loop 2, a microswitch detection circuit is composed of resistors R9, R10 and a triode Q1, when the electromagnetic lock in the charging gun is opened, the microswitch is disconnected, the resistance value between a CC1 contact and a PE contact is infinite, the terminal voltage of the CC1 contact is 12V, namely the base voltage of a triode Q1 is 12V, the emitter voltage of a triode Q1 is 10V, the emitter voltage is lower than the base voltage, the triode Q1 is cut off, and no signal is output to the remote signaling input loop 2; when the electromagnetic lock is closed, the microswitch is closed, the resistance value between the CC1 contact and the PE contact is R2, the terminal voltage of the CC1 is 6V, the emitter voltage of the triode Q1 is higher than the base voltage, the triode Q1 is conducted, and a 12V voltage signal is output to the remote signaling input loop 2.
When the microswitch detection circuit does not output signals to the remote signaling input loop, the light-emitting diode in the optocoupler does not emit light, the phototriode is cut off, and the remote signaling output end is at a high level; when a 12V voltage signal in the microswitch detection circuit is output to the remote signaling input loop, the light emitting diode in the optical coupler emits light, the phototriode is conducted, and the remote signaling output end is at a low level.
When the charging gun electromagnetic lock is opened, the resistance value between the CC1 and the PE is infinite, the voltage at the CC1 end is 12V, namely the voltage at the base electrode of the triode Q1 is 12V, the voltage at the emitter electrode of the triode is 10V, the voltage at the emitter electrode is lower than the voltage at the base electrode, the triode is cut off, no signal is output to the remote signaling input loop 2, and the output end is high level; when the charging gun electromagnetic lock is closed, the resistance value between the CC1 and the PE is R2, the voltage at the CC1 end is 6V, the voltage of an emitter of the triode Q1 is higher than the voltage of a base electrode, the triode is conducted, a 12V voltage signal is output to the remote signaling input circuit 2, and the output end is at a low level.
The optocouplers E1 and E2 play an isolating role, the input end and the output end of a remote signal are isolated in a photoelectric isolation mode, independent power supplies can be arranged at the two ends of the remote signal, and the two ends of the remote signal are not connected with the ground, so that the core component is prevented from being influenced by the outside. The resistors R7 and R8 and the capacitors C2 and C3 respectively play a role in filtering, filtering high-frequency interference signals of a remote signaling loop, avoiding the interference signals from generating wrong remote signaling, and simultaneously playing a role in limiting current, so that the current entering the light-emitting diode is limited to milliampere level.
In addition, the invention is also suitable for the alternating current charging pile, wherein the contacts are a CP signal contact and a PE signal contact, the CP contact is connected with a resistor R1, the other end of the R1 is connected with a microswitch S1, the S1 is also connected with 12V voltage and PWM signals, and the PE is grounded. For the alternating-current charging pile, the resistance value change between the CP contact and the PE contact is utilized to detect, and therefore the homing condition of the charging gun and the switching state of an electromagnetic lock in the charging gun are judged.
According to the invention, the resistance between the CC1/CP contact and the PE contact of the DC charging pile/AC charging pile is utilized to generate a remote signaling signal to judge whether the charging gun is reset, and the on-off state of the electromagnetic lock in the charging gun is detected by utilizing the change of the resistance between the CC1/CP and the PE, so that two paths of remote signaling signals are simultaneously judged, the reset condition of the charging gun and the on-off state of the electromagnetic lock in the charging gun are effectively detected, the stability and the reliability of the system are enhanced, the system misjudgment caused by the detection in a mechanical mode can be avoided, the detection mode is not limited by the service life of the mechanical switch, the reliability of the system detection is improved, the DC charging pile and the AC charging pile can be simultaneously applied, and the application range of the detection mode is expanded.
As shown in fig. 2, the present invention also discloses a homing detection method for a charging gun using the detection circuit, which includes the following operations:
whether a resistor between a charging pile base and a contact of a charging gun is divided to generate potential difference or not is utilized, and a high level or a low level is output through the on-off of an optical coupler to judge whether the charging gun is reset or not;
the resistance value that the utilization was filled between electric pile base and the contact of the rifle that charges changes, through switching on and ending of opto-coupler, output high level or low level judge whether the rifle electromagnetic lock that charges opens.
Whether the charging gun is in place or not is detected through a remote signaling input loop 1, no potential difference exists between a CC1 contact and a PE contact when the charging gun is not in a reset state, a light emitting diode in an optocoupler E1 does not emit light, a phototriode is cut off, and the remote signaling output end is at a high level; when the charging gun is reset, the resistor between the CC1 contact and the PE contact is connected into the remote signaling input circuit 1, the resistor divides voltage, potential difference is generated at two ends of the light emitting diode, the light emitting diode emits light, the phototriode is conducted, and the remote signaling output end is at low level. Through the circuit, whether the charging gun is returned or not is judged by generating a remote signaling signal by using the resistance between the CC1 and the PE contact.
The on-off state of an electromagnetic lock in the charging gun is detected through the remote signaling input loop 2, when the electromagnetic lock of the charging gun is opened, the resistance value between the CC1 and the PE is infinite, the voltage at the CC1 end is 12V, namely the voltage at the base of a triode Q1 is 12V, the voltage at the emitter of the triode is 10V, the voltage of the emitter is lower than the voltage at the base, the triode is cut off, no signal is output to the remote signaling input loop 2, and the output end is high level; when the charging gun electromagnetic lock is closed, the resistance value between the CC1 and the PE is R2, the voltage at the CC1 end is 6V, the voltage of an emitter of the triode Q1 is higher than the voltage of a base electrode, the triode is conducted, a 12V voltage signal is output to the remote signaling input circuit 2, and the output end is at a low level.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An electrically homing detection circuit for a charging gun, comprising:
a contact signal input circuit, a microswitch detection circuit, a remote signaling input circuit 1 and a remote signaling input circuit 2 are arranged in the charging pile, and the microswitch detection circuit is connected with the remote signaling input circuit 2;
when the charging gun is reset, the contact signal input circuit is respectively connected with the microswitch detection circuit and the remote signaling input circuit 1;
the remote signaling input circuit 1 detects whether the charging gun is in place or not by using resistance between contacts between the contact signal input circuit and the remote signaling input circuit 1, and the remote signaling input circuit 2 detects the on-off state of an electromagnetic lock in the charging gun by using change of the resistance between the contacts between the contact signal input circuit and the remote signaling input circuit 2.
2. The electrical gun homing detection circuit of claim 1, wherein the charging post is a dc charging post or an ac charging post.
3. The electrical homing detection circuit of claim 1, wherein the contact signal input circuit is configured to:
for the direct current charging pile, a CC1 contact is connected with resistors R1 and R2, the other end of R1 is connected with 12V voltage, the other end of R2 is connected with a microswitch S, and the other end of the microswitch S is connected with a PE contact;
for the alternating current charging pile, the contacts are a CP signal contact and a PE signal contact, the CP contact is connected with a resistor R1, the other end of the R1 is connected with a microswitch S1, the S1 is also connected with 12V voltage and PWM signals, and the PE is grounded.
4. The homing detection circuit of claim 1, wherein the remote signaling input circuit 1 has a circuit structure of:
the contact point of CC1 is connected resistance R7, and the 1 st pin of diode VD1, electric capacity C2 and opto-coupler E1 is connected to the R7 other end, and diode VD1, electric capacity C2 and the 2 nd pin of opto-coupler E1 are connected resistance R8, and the PE contact is connected to the R8 other end, and the 4 th pin of E1 is connected EKI1 output and electric capacity C1.
5. The homing detection circuit of claim 1, wherein the remote signaling input circuit 2 has a circuit structure of:
the CC1 contact is connected with the base of a triode Q1, the PE contact is connected with a resistor R10, the other end of R10 is connected with the emitters of a resistor R9 and a Q1, the other end of R9 is connected with 12V voltage, the collector of Q1 is connected with a diode VD2, a capacitor C3 and the 1 st pin of an optocoupler E2, the 2 nd pins of the diode VD2, the capacitor C3 and the optocoupler E2 are connected with the PE contact, and the 4 th pin of E2 is connected with the output end of the EKI2 and the capacitor C4.
6. The homing detection circuit of claim 4, wherein in an un-homing state of the charging gun, there is no potential difference between the CC1 contact and the PE contact, the light emitting diode of the optocoupler E1 is not emitting light, the phototriode is turned off, and the remote signaling output terminal is at a high level; when the charging gun is reset, the resistor between the CC1 contact and the PE contact is connected into the remote signaling input circuit 1, the resistor divides voltage, potential difference is generated at two ends of the light emitting diode, the light emitting diode emits light, the phototriode is conducted, and the remote signaling output end is at low level.
7. The homing detection circuit of claim 5, wherein when the electromagnetic lock of the charging gun is turned on, the resistance between the CC1 and the PE is infinite, the voltage at the CC1 end is 12V, that is, the base voltage of the transistor Q1 is 12V, the emitter voltage of the transistor is 10V, the emitter voltage is lower than the base voltage, the transistor is turned off, no signal is output to the remote signaling input loop 2, and the output end is high; when the charging gun electromagnetic lock is closed, the resistance value between the CC1 and the PE is R2, the voltage at the CC1 end is 6V, the voltage of an emitter of the triode Q1 is higher than the voltage of a base electrode, the triode is conducted, a 12V voltage signal is output to the remote signaling input circuit 2, and the output end is at a low level.
8. A homing detection method of a charging gun implemented by the detection circuit of any one of claims 1 to 7, comprising the following operations:
whether a resistor between a charging pile base and a contact of a charging gun is divided to generate potential difference or not is utilized, and a high level or a low level is output through the on-off of an optical coupler to judge whether the charging gun is reset or not;
the resistance value that the utilization was filled between electric pile base and the contact of the rifle that charges changes, through switching on and ending of opto-coupler, output high level or low level judge whether the rifle electromagnetic lock that charges opens.
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