CN207579616U - The general guidance circuit of charging pile - Google Patents
The general guidance circuit of charging pile Download PDFInfo
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- CN207579616U CN207579616U CN201721676305.XU CN201721676305U CN207579616U CN 207579616 U CN207579616 U CN 207579616U CN 201721676305 U CN201721676305 U CN 201721676305U CN 207579616 U CN207579616 U CN 207579616U
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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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The utility model is related to a kind of general guidance circuit of charging pile, including interactive module；The interactive module includes input unit and level conversion unit；The input unit is equipped with first input end, the second input terminal, the first output terminal and second output terminal；For connecting the processing circuit, second input terminal is used to connect reference voltage the first input end；The level conversion unit includes operational amplifier U1；The in-phase input end of the operational amplifier U1 connects first output terminal, and the inverting input of the operational amplifier U1 connects the second output terminal；The output terminal of the operational amplifier U1 is used to connect charging gun circuit.The above-mentioned general guidance circuit of charging pile, simple in structure, reasonable design, processing pwm signal can be received, also stable+12V the high level signals of processing can be received, the exchange guiding of compatible charging pile is guided with direct current, the versatility and practicability of charging pile guidance circuit are improved, is conducive to the universal of electric vehicle.
Description
Technical field
The utility model is related to charge control technical field, more particularly to a kind of general guidance circuit of charging pile.
Background technology
With traditional fossil energy exhaustion and environmental pollution getting worse and electronic technology, control technology not
Disconnected development, is widely used electric vehicle.Since the thermal energy storage process of electric vehicle is compared to traditional fossil energy
Energy storage mode is complex, and the whether good key factor of performance for determining electric vehicle is exactly the safety of charging system can
By property.
Charging pile charging guidance circuit, for connecting the processing circuit in charging pile and receiving what is sent out from processing circuit
Signal.Generally, the PWM waveform that alternating-current charging pile charging directed reception processing circuit is sent out, passes through monitoring during charging
PWM waveform amplitude realizes the interaction between alternating-current charging pile and vehicle, and direct-current charging post charging guiding is receiving processing circuit
The 12V stable level signals sent out, during charging by monitor 12V level signals amplitude realize direct-current charging post with
Interaction between vehicle.Alternating-current charging pile is different from the charged form of direct-current charging post, and two kinds of charged forms can not be compatible, is
The universal of electric vehicle brings certain difficulty.
Utility model content
Based on this, the utility model provides a kind of general guidance circuit of charging pile, and simple in structure, reasonable design is compatible
The exchange guiding of charging pile is guided with direct current, improves the versatility and practicability of charging pile guidance circuit.
In order to realize the purpose of this utility model, the utility model adopts the following technical solution：
A kind of general guidance circuit of charging pile, the interactive module including being used for connection processing circuit；The interactive module packet
Include the level conversion unit of input unit and the connection input unit；The input unit is equipped with first input end, second defeated
Enter end, the first output terminal and second output terminal；The first input end is used to connect the processing circuit, second input terminal
For connecting reference voltage；The level conversion unit includes operational amplifier U1；The homophase input of the operational amplifier U1
End connects first output terminal, and the inverting input of the operational amplifier U1 connects the second output terminal；The operation
The output terminal of amplifier U1 is used to connect charging gun circuit.
The above-mentioned general guidance circuit of charging pile, simple in structure, reasonable design can receive processing pwm signal, Ye Neng receiving areas
Stable+12V high level signals are managed, exchange guiding and the direct current of compatible charging pile guide, and improve charging pile guidance circuit
Versatility and practicability are conducive to the universal of electric vehicle.
The general guidance circuit of the charging pile further includes the detection for connecting the interactive module in one of the embodiments,
Protection module；The detection protection module includes connecting the voltage regulation unit of the level conversion unit and the connection voltage stabilizing list
The partial pressure unit of member；The partial pressure unit is used to connect the processing circuit.
The input unit includes resistance R1, R2, R3, R4 and capacitance C1 in one of the embodiments,；The resistance R1
One end connect the first input end, the other end of the resistance R1, which connects, to be connected the operation after first output terminal and puts
The in-phase input end of big device U1；One end of the resistance R2 connects the first input end, the other end connection of the resistance R2
The reference voltage；One end of the resistance R3 connects second input terminal, the other end connection of the resistance R3 described the
The inverting input of the operational amplifier U1 is connected after two output terminals；One end connection second output of the resistance R4
End, the other end ground connection of the resistance R4；The both ends of the capacitance C1 connect the both ends of the resistance R4 respectively.
The input unit further includes diode D1 and diode D2 in one of the embodiments,；The diode D1
Anode connect the first input end, the cathode of the diode D1 connects the reference voltage；The moon of the diode D2
Pole connects the first input end, the plus earth of the diode D2.
The level conversion unit further includes capacitance C2 and capacitance C3 in one of the embodiments,；The operation amplifier
For connecting supply voltage, one end of the capacitance C2 connects the power supply of the operational amplifier U1 for the positive connecting pin of power supply of device U1
Positive connecting pin, the other end ground connection of the capacitance C2；After the power supply of institute operational amplifier U1 bears the connecting pin connection capacitance C3
Ground connection.
The operational amplifier U1 is rail-to-rail operational amplifier in one of the embodiments,；The supply voltage for+
12V。
The level switch module further includes one end connection of resistance R5, the resistance R5 in one of the embodiments,
The output terminal of the operational amplifier U1, the other end of the resistance R5 are respectively used to connect the voltage regulation unit and the charging
Rifle circuit.
The voltage regulation unit includes diode D3, resistance R6, R7 and operational amplifier U2 in one of the embodiments,；
The anode of the diode D3 connects the resistance R5, and the cathode of the diode D3 connects one end of the resistance R6, described
The other end of resistance R6 connects the in-phase input end of the operational amplifier U2；One end of the resistance R7 is connected to the resistance
Between R6 and the operational amplifier U2, the other end ground connection of the resistance R7；The inverting input of the operational amplifier U2
The output terminal of the operational amplifier U2 is connected, the output terminal of the operational amplifier U2 connects the partial pressure unit.
The partial pressure unit includes resistance R8, R9 and capacitance C4 in one of the embodiments,；The partial pressure unit is set
There is the signal input part for the output terminal for connecting the operational amplifier U2 and for connecting the output of the signal of the processing circuit
End；One end of the resistance R8 connects the signal input part, and the other end of the resistance R8 connects the signal output end；Institute
The one end for stating resistance R9 connects the signal input part, and the other end of the resistance R9 connects the signal output end；The electricity
The both ends for holding C4 connect the both ends of the resistance R9 respectively.
The partial pressure unit further includes diode D4 and diode D5 in one of the embodiments,；The diode D4
Anode connect the signal output end, the cathode of the diode D4 connects the reference voltage；The moon of the diode D5
Pole connects the signal output end, the plus earth of the diode D5.
Description of the drawings
Fig. 1 is the structure diagram of the general guidance circuit of charging pile of one better embodiment of the utility model；
Fig. 2 is the circuit diagram of the general guidance circuit of charging pile shown in FIG. 1；
Fig. 3 is the application schematic diagram of the general guidance circuit of charging pile shown in FIG. 1；
Attached drawing marks explanation：
10- interactive modules, 11- input units, 12- level conversion units；
20- detects protection module, 21- voltage regulation units, 22- partial pressure units；
30- processing circuits, 31- first ports, 32- second ports, 33- third ports；
40- power supply circuits, 50- charging gun circuits.
Specific embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is the public affairs made to the utility model
Open the understanding more thorough and comprehensive of content.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to the technology of the utility model
The normally understood meaning of technical staff in domain is identical.It is only in the term used in the description of the utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
It please refers to Fig.1 to Fig.3, is the general guidance circuit of charging pile of one better embodiment of the utility model, for simultaneous
The AC charging guiding of capacity charge stake is guided with DC charging.The general guidance circuit of the charging pile includes interactive module 10 and connects
Connect the detection protection module 20 of the interactive module 10.Interactive module 10, detection protection module 20 are respectively used to connection processing circuit
30, processing circuit 30 connects power supply circuit 40, and power supply circuit 40 is also connected with charging gun circuit 50.The interactive module 10 includes defeated
Enter unit 11 and connect the level conversion unit 12 of input unit 11.It is described detection protection module 20 include voltage regulation unit 21 and
Connect the partial pressure unit 22 of voltage regulation unit 21；Level conversion unit 12 connects voltage regulation unit 21.
The input unit 11 is equipped with first input end, the second input terminal, the first output terminal and second output terminal.First is defeated
Enter to hold connection processing circuit 30, the control signal sent out for receiving processing circuit 30.Second input terminal connects reference voltage,
In the present embodiment, reference voltage is+3.3V.First output terminal connect level conversion unit 12 with second output terminal respectively.
As shown in Fig. 2, the input unit 11 includes resistance R1, R2, R3, R4 and capacitance C1.One end connection of resistance R1
First input end, the other end of resistance R1 connect connection level conversion unit 12 after the first output terminal.One end connection of resistance R2
First input end, the other end connection reference voltage of resistance R2.In the present embodiment, resistance R2 is as pull-up resistor, it is ensured that the
The level that one output terminal can keep stable exports.When normally powering on, control signal accesses level conversion unit after resistance R1
12。
One end of resistance R3 connects the second input terminal, and level is connected after the other end connection input second output terminal of resistance R3
Converting unit 12.In the present embodiment, one end connection second output terminal of resistance R4, the other end ground connection of resistance R4.On normal
After electricity, reference voltage is divided after forming reference voltage and accesses level conversion unit 12 by resistance R3 and resistance R4.In the present embodiment
In, the resistance value of resistance R4 is equal with the resistance value of resistance R3；The size of reference voltage is 1.65V.The both ends of capacitance C1 connect respectively
The both ends of resistance R4.
Further, in the present embodiment, input unit 11 further includes diode D1 and diode D2, for protecting electricity
Road.Specifically, the anode connection first input end of diode D1, the cathode connection reference voltage of diode D1；Diode D2's
Cathode connects first input end, the plus earth of diode D2.
The level switch module 12 includes operational amplifier U1, capacitance C2 and capacitance C3.The same phase of operational amplifier U1
Input terminal connects the first output terminal of input unit 11, receives the control signal by resistance R1 modulation.Operational amplifier U1's
Inverting input connects the second output terminal of input unit 11, receives reference voltage.The output terminal of operational amplifier U1 is as friendship
Mutual signal output end, for exporting interactive signal.The positive connecting pin connection supply voltage of power supply of operational amplifier U1, capacitance C2's
The positive connecting pin of power supply of one end connection operational amplifier U1, the other end ground connection of capacitance C2.The power supply of operational amplifier U1 bears company
It is grounded after meeting end connection capacitance C3.In the present embodiment, operational amplifier U1 be rail-to-rail operational amplifier, supply voltage for+
12V.In order to which preferably interactive signal is adjusted, the output terminal of operational amplifier U1 is also associated with resistance R5.Resistance R5's
The output terminal of one end connection operational amplifier U1, the other end connection voltage regulation unit 21 of resistance R5.Further, resistance R5's is another
One end is additionally operable to connect charging gun circuit 50 outward.Specifically, the other end of resistance R5 connects the CP of charging gun circuit 50 respectively
(Control Pilot, control confirm) line and CC (Control Confirm, charging connection confirm) line.It is handed over when charging pile is in
Under current charge pattern, interactive signal selection interacts after entering CP lines with vehicle；When charging pile is under DC charging pattern,
Interactive signal selection interacts after entering CC lines with vehicle.
The voltage regulation unit 21 includes diode D3, resistance R6, R7 and operational amplifier U2.The anode of diode D3 connects
One end of the cathode connection resistance R6 of connecting resistance R5, diode D3, the same phase of the other end connection operational amplifier U2 of resistance R6
Input terminal.One end of resistance R7 is connected between resistance R6 and operational amplifier U2, and the other end ground connection of resistance R7 carries for electric current
For circuit.In the present embodiment, operational amplifier U2 is voltage follower, and it is defeated that the inverting input of operational amplifier U2 connects its
Outlet, the output terminal of operational amplifier U2 are additionally operable to connection partial pressure unit 22.
The partial pressure unit 22 includes resistance R8, R9 and capacitance C4.The partial pressure unit 22 is equipped with signal input part and letter
Number output terminal.One end of resistance R8 is as signal input part, and the other end of resistance R8 is as signal output end.Specifically, signal
The output terminal of input terminal connection operational amplifier U2, signal output end are used for connection processing circuit 30.In the present embodiment, resistance
One end connection signal output terminal of R9, the other end ground connection of resistance R9.The both ends of capacitance C4 connect the both ends of resistance R9 respectively.
Further, in the present embodiment, partial pressure unit 22 further includes diode D4 and diode D5, for protecting electricity
Road.Specifically, the anode connection signal output terminal of diode D4, the cathode connection reference voltage of diode D4；Diode D5's
Cathode connection signal output terminal, the plus earth of diode D5.
In the present embodiment, processing circuit 30 is equipped with first port 31, second port 32, third port 33 and other termination
Mouthful.First port 31 connects the first input end of input unit 11, and second port 32 connects the signal output end of partial pressure unit 22,
Third port 33 is used to connect power supply circuit 40.
Operation principle：
Under AC charging pattern, 31 output pwm signal of first port of processing circuit 30 is as control signal, into interaction
Module 10.Control the in-phase input end of signal input operational amplifier U1 after resistance R1, at the same reference voltage by R3 with
R4 forms the inverting input of input operational amplifier U1 after reference voltage after dividing, if at this point, the same phase of operational amplifier U1
The voltage swing of input terminal is more than 1.65V, then the output terminal output high level of operational amplifier U1, conversely, operational amplifier U1
Output terminal output low level.Since operational amplifier U1 is rail-to-rail operational amplifier, and the power supply of operational amplifier U1 is electric
Press as+12V, therefore, the high level of operational amplifier U1 outputs is+12V, and the low level of output is -12V, i.e., interactive signal for+
The pwm signal of 12V or the pwm signal of -12V.Interactive signal is split into the first interactive signal and the second interaction after resistance R5
Signal, the CP lines of the first interactive signal connection charging gun circuit 50 are interacted with vehicle, and the second interactive signal, which enters detection, to be protected
Protect module 20.Second interactive signal passes through diode D3, the negative electricity laminate section in the second interactive signal is removed, by resistance R6
After operational amplifier U2, after resistance R8 and resistance R9 partial pressures, the second port 32 for being input to processing circuit 30 carries out
Detection.The voltage value that the second port 32 of processing circuit 30 detects can obtain the voltage value V of OUT points after conversionOUT。
If VOUTFor 12V, illustrate that charging gun is not connected to vehicle at this time；If VOUTFor 9V, illustrate that charging gun is inserted at this time and connect
The charge port picked up, the first port 31 of processing circuit 30 continuously send out pwm signal；If VOUTFor 6V, the of processing circuit 30
Three ports 33 send out signal control power supply circuit 40, and power supply circuit 40 directly supplies electricity to charging gun circuit 50, vehicle is filled
Electricity.
Under DC charging pattern, the first port 31 of processing circuit 30 exports stable+12V high level signals as control
Signal, the in-phase input end of control signal input operational amplifier U1 after resistance R1, while reference voltage passes through R3 and R4
After partial pressure formed reference voltage after input operational amplifier U1 inverting input, at this time operational amplifier U1 in-phase input end
Voltage swing be consistently greater than 1.65V, then the output terminal of operational amplifier U1 persistently exports high level.Due to operational amplifier U1
For rail-to-rail operational amplifier, and the supply voltage of operational amplifier U1 is+12V, therefore, the height electricity of operational amplifier U1 outputs
It puts down as+12V, i.e. high level signal of the interactive signal for+12V.Interactive signal connects charging gun circuit 50 after resistance R5
CC lines, interact with vehicle.Interactive signal is split into the first interactive signal and the second interactive signal after resistance R5, and first
The CC lines of interactive signal connection charging gun are interacted with vehicle, and the second interactive signal enters detection protection module 20.Second hands over
Mutual signal is after diode D3, resistance R6 and operational amplifier U2, and after resistance R8 and resistance R9 partial pressures, input is everywhere
The second port 32 of reason circuit 30 is detected.The voltage value that the second port 32 of processing circuit 30 detects, after conversion
It can obtain the voltage value V of OUT pointsOUT。
If VOUTFor 12V, illustrate that charging gun is not connected to vehicle at this time；If VOUTFor 6V, illustrate that charging gun is inserted at this time and connect
The charge port picked up, the first port 31 of processing circuit 30 continuously send out stable+12V high level signals；If VOUTFor 4V,
The third port 33 of processing circuit 30 sends out signal control power supply circuit 40, and power supply circuit 40 directly supplies electricity to charging gun circuit
50, it charges to vehicle.
The above-mentioned general guidance circuit of charging pile, simple in structure, reasonable design can receive processing pwm signal, Ye Neng receiving areas
Stable+12V high level signals are managed, exchange guiding and the direct current of compatible charging pile guide, and improve charging pile guidance circuit
Versatility and practicability are conducive to the universal of electric vehicle.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that the common skill for this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
- A kind of 1. general guidance circuit of charging pile, which is characterized in that the interactive module including being used for connection processing circuit；The friendship Mutual module includes the level conversion unit of input unit and the connection input unit；The input unit is equipped with the first input End, the second input terminal, the first output terminal and second output terminal；The first input end is described for connecting the processing circuit Second input terminal is used to connect reference voltage；The level conversion unit includes operational amplifier U1；The operational amplifier U1 In-phase input end connect first output terminal, inverting input connection second output of the operational amplifier U1 End；The output terminal of the operational amplifier U1 is used to connect charging gun circuit.
- 2. the general guidance circuit of charging pile according to claim 1, which is characterized in that further include the connection interactive module Detection protection module；The detection protection module includes connecting described in the voltage regulation unit of the level conversion unit and connection The partial pressure unit of voltage regulation unit；The partial pressure unit is used to connect the processing circuit.
- 3. the general guidance circuit of charging pile according to claim 1, which is characterized in that the input unit includes resistance R1, R2, R3, R4 and capacitance C1；One end of the resistance R1 connects the first input end, the other end connection of the resistance R1 The in-phase input end of the operational amplifier U1 is connected after first output terminal；One end connection described first of the resistance R2 Input terminal, the other end of the resistance R2 connect the reference voltage；One end of the resistance R3 connects second input terminal, The inverting input of the operational amplifier U1 is connected after the other end connection second output terminal of the resistance R3；The electricity The one end for hindering R4 connects the second output terminal, the other end ground connection of the resistance R4；The both ends of the capacitance C1 connect respectively The both ends of the resistance R4.
- 4. the general guidance circuit of charging pile according to claim 1, which is characterized in that the input unit further includes two poles Pipe D1 and diode D2；The anode of the diode D1 connects the first input end, the cathode connection institute of the diode D1 State reference voltage；The cathode of the diode D2 connects the first input end, the plus earth of the diode D2.
- 5. the general guidance circuit of charging pile according to claim 1, which is characterized in that the level conversion unit further includes Capacitance C2 and capacitance C3；The positive connecting pin of power supply of the operational amplifier U1 is for connecting supply voltage, and the one of the capacitance C2 End connects the positive connecting pin of power supply of the operational amplifier U1, the other end ground connection of the capacitance C2；Institute operational amplifier U1's Power supply is born after connecting pin connects the capacitance C3 and is grounded.
- 6. the general guidance circuit of charging pile according to claim 5, which is characterized in that the operational amplifier U1 is arrived for rail Rail operational amplifier；The supply voltage is+12V.
- 7. the general guidance circuit of charging pile according to claim 2, which is characterized in that the level switch module further includes One end of resistance R5, the resistance R5 connect the output terminal of the operational amplifier U1, and the other end of the resistance R5 is used respectively In the connection voltage regulation unit and the charging gun circuit.
- 8. the general guidance circuit of charging pile according to claim 7, which is characterized in that the voltage regulation unit includes diode D3, resistance R6, R7 and operational amplifier U2；The anode of the diode D3 connects the resistance R5, the moon of the diode D3 Pole connects one end of the resistance R6, and the other end of the resistance R6 connects the in-phase input end of the operational amplifier U2；Institute The one end for stating resistance R7 is connected between the resistance R6 and the operational amplifier U2, the other end ground connection of the resistance R7； The inverting input of the operational amplifier U2 connects the output terminal of the operational amplifier U2, and the operational amplifier U2's is defeated Outlet connects the partial pressure unit.
- 9. the general guidance circuit of charging pile according to claim 8, which is characterized in that the partial pressure unit includes resistance R8, R9 and capacitance C4；The partial pressure unit is equipped with the signal input part for the output terminal for connecting the operational amplifier U2 and uses In the signal output end for connecting the processing circuit；One end of the resistance R8 connects the signal input part, the resistance R8 The other end connect the signal output end；One end of the resistance R9 connects the signal input part, and the resistance R9's is another One end connects the signal output end；The both ends of the capacitance C4 connect the both ends of the resistance R9 respectively.
- 10. the general guidance circuit of charging pile according to claim 9, which is characterized in that the partial pressure unit further includes two Pole pipe D4 and diode D5；The anode of the diode D4 connects the signal output end, the cathode connection of the diode D4 The reference voltage；The cathode of the diode D5 connects the signal output end, the plus earth of the diode D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721676305.XU CN207579616U (en) | 2017-12-04 | 2017-12-04 | The general guidance circuit of charging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721676305.XU CN207579616U (en) | 2017-12-04 | 2017-12-04 | The general guidance circuit of charging pile |
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| Publication Number | Publication Date |
|---|---|
| CN207579616U true CN207579616U (en) | 2018-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721676305.XU Active CN207579616U (en) | 2017-12-04 | 2017-12-04 | The general guidance circuit of charging pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113794260A (en) * | 2021-09-28 | 2021-12-14 | 长春捷翼汽车零部件有限公司 | Charging guide signal acquisition circuit, new energy vehicle-mounted charging seat and charging pile |
-
2017
- 2017-12-04 CN CN201721676305.XU patent/CN207579616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113794260A (en) * | 2021-09-28 | 2021-12-14 | 长春捷翼汽车零部件有限公司 | Charging guide signal acquisition circuit, new energy vehicle-mounted charging seat and charging pile |
| CN113794260B (en) * | 2021-09-28 | 2024-09-03 | 长春捷翼汽车科技股份有限公司 | Charging guide signal acquisition circuit, new energy vehicle-mounted charging seat and charging pile |
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