CN114062805A - Detection circuit for alternating current charging control guide signal of electric automobile - Google Patents

Detection circuit for alternating current charging control guide signal of electric automobile Download PDF

Info

Publication number
CN114062805A
CN114062805A CN202111292835.5A CN202111292835A CN114062805A CN 114062805 A CN114062805 A CN 114062805A CN 202111292835 A CN202111292835 A CN 202111292835A CN 114062805 A CN114062805 A CN 114062805A
Authority
CN
China
Prior art keywords
electrically connected
resistor
signal
input end
diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111292835.5A
Other languages
Chinese (zh)
Inventor
彭建华
潘继雄
周幼华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Yujiaocheng Technology Co ltd
Original Assignee
Shenzhen Yujiaocheng Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Yujiaocheng Technology Co ltd filed Critical Shenzhen Yujiaocheng Technology Co ltd
Priority to CN202111292835.5A priority Critical patent/CN114062805A/en
Publication of CN114062805A publication Critical patent/CN114062805A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to the technical field of new energy electric control, discloses a detection circuit for an alternating current charging control pilot signal of an electric vehicle, and provides the detection circuit for the alternating current charging control pilot signal aiming at the problem that the alternating current charging reliability and stability of the electric vehicle in the current market are poor. Meanwhile, the short-circuit wire of the switch S2 is led out from the detection circuit, and when the short-circuit wire is used for equipment debugging or emergency charging, the short-circuit wire can be directly connected with a signal ground to avoid the software control logic of the switch S2, so that the detection circuit is convenient to flexibly apply on site. In addition, the invention can also realize the functions of activating the low-voltage power-on and delayed power-off of the vehicle-mounted controller by the CP signal awakening, and when the vehicle-mounted controller is accidentally lost or powered off due to an external activation signal, the purposes of delayed power-off and data storage can be achieved through the CPU control logic.

Description

Detection circuit for alternating current charging control guide signal of electric automobile
Technical Field
The invention relates to the technical field of new energy electronic control, in particular to a detection circuit for an alternating current charging control guide signal of an electric vehicle.
Background
Under the big background of global energy crisis and serious environmental crisis, the application and development of new energy automobiles are actively promoted by the government of China, the electric automobiles are used as green vehicles with wide development prospect, the popularization speed in future is extremely rapid, the market prospect in future is extremely huge, and the charging piles are used as important matched charging infrastructures necessary for developing the electric automobiles, so that the charging piles have very important social benefits and economic benefits.
The charging pile is used as an energy supply device of the electric automobile and is divided into an alternating current charging pile and a direct current charging pile, the charging power of the direct current charging pile is high, the requirement for power supply is high, a circuit and a transformer need to be laid in advance, the direct current charging pile is generally built in a special charging (converting) station, the alternating current charging pile is just opposite to the direct current charging pile, the alternating current charging pile is used for supplying power from a 220VAC single-phase alternating current power supply of a public power grid, the maximum charging power is generally not more than 7KW, the mounting conditions are met in general communities and building office places, and even if a plurality of alternating current charging piles are additionally mounted, industrial electricity and domestic electricity in peripheral areas cannot be influenced.
Different from the blind charging mode of the electric two-wheeled vehicle on the low-end market, the charging process of the electric vehicle needs to control a guide signal to confirm the connection of the charging device and judge the rated current parameter, and communication links and interaction between the two parties are established on the basis of the judgment, and the whole charging process is continued. The recognition of the charging control pilot signal is a key for successful handshake between the charging device and the vehicle-mounted control device, and is a precondition for normal start of a charging process. Therefore, the detection of the charging control pilot signal is an important working link of the vehicle-mounted control device, and the charging safety of the electric vehicle is not ignored.
According to the national standard for vehicle-mounted conduction charging GB/T18487.1-2015 electric vehicle conduction charging system-part 1: the provision in general requirements that the ac charging requires detection of charging control pilot signals CC and CP, CC reflecting the vehicle interface connection status and the rated capacity of the connection cable, transmitted to the on-board control device as a resistance signal; the CP is used for monitoring the interaction function between the electric automobile and the power supply equipment, reflects the maximum power supply capacity of the current power supply equipment, and transmits a constant voltage or voltage pulse signal to the vehicle-mounted control device; the vehicle-mounted control device is responsible for detecting the CC and the CP, the vehicle-mounted control device CAN be a Battery Management System (BMS) or a vehicle-mounted charger (OBC) according to the control logic of the whole vehicle, the CC and CP signals detected by the BMS belong to the mainstream method at present, after the charging control guide signal detection is finished, the electric vehicle and the alternating current charging pile start to establish a CAN communication link relationship and enter a charging process, and fig. 1 is a block diagram of alternating current charging electrical conduction and communication link relationship.
At present, the detection circuit for alternating charging control guide signals CC and CP in the market is eight-gate, which can not be enumerated, and realizes no two functions: firstly, detecting a CC resistor, a CP voltage and a pulse waveform duty ratio; secondly, the CC and CP signals wake up the activation of the onboard control devices (mainly BMS). However, with the recent blowout development of electric vehicles and the increasing production and sales volume of joints, poor charging reliability and stability are gradually revealed in wide practical applications, and one of the reasons for this is that the detection accuracy of the charging control pilot signals CC and CP is not high, which leads to erroneous judgment and charging failure.
Disclosure of Invention
The invention mainly aims to provide a detection circuit for an alternating current charging control guide signal of an electric vehicle, aiming at improving the sampling precision of CC and CP signals and improving the reliability and stability of alternating current charging.
In order to achieve the above purpose, the detection circuit for the ac charging control pilot signal of the electric vehicle provided by the present invention comprises a CP detection circuit, wherein the CP detection circuit comprises an operational amplifier U1, diodes D1-D4, a MOS transistor Q1, triodes Q2-Q3, fuses F1-F2, resistors R1-R14, capacitors C1-C3, a signal input end CP to be detected, a pulse signal output end DI-CP, a CP power supply wake-up signal output end CP-PWM, a control signal input end CTR-CP of a switch S2, and a short-circuit signal input end S2-Jper of a switch S2, wherein the signal input end CP to be detected, the diode D1, the fuse F1, the diode D3, the resistor R4, the resistor R5, the triode Q3, and the CP power supply wake-up signal output end CP-PWM are sequentially connected in series, two ends of the resistor R9 are respectively and electrically connected with an output end of the diode D3 and an inverted input end of the operational amplifier U1, one end of the resistor R11 and one end of the resistor R12 are respectively electrically connected with a non-inverting input end of the operational amplifier U1, the other end of the resistor R11 is electrically connected with a signal ground GND, the other end of the resistor R12 is electrically connected with a power supply D5V, two ends of the capacitor C2 are respectively electrically connected with the resistor R12 and the signal ground GND, two ends of the resistor R10 are respectively electrically connected with an inverting input end of the operational amplifier U1 and the signal ground GND, two ends of the resistor R14 and the capacitor C3 are respectively electrically connected with the pulse signal output end DI-CP and the signal ground GND, two ends of the diode D2 and the resistor R1 are respectively electrically connected with an input end of the diode D3 and the signal ground GND, two ends of the capacitor C1 are respectively electrically connected with the resistor R4 and the signal ground GND, one end of the resistor R6 and the input end of the diode D4 are respectively electrically connected with the signal ground, the other end of the resistor R365 and the output end of the diode D4 are respectively electrically connected with the triode Q3, an input end of the diode D3, a resistor R2, a fuse F2 and a switch S2 short-circuit signal input end S2-Jper are sequentially and electrically connected in series, the resistor R2, an MOS tube Q1 and an emitter of a triode Q2 are sequentially and electrically connected in series, a base of the triode Q2, a resistor R8 and a control signal input end CTR-CP of the switch S2 are sequentially and electrically connected in series, a collector of the triode Q2, the resistor R7 and a power supply D5V are sequentially and electrically connected in series, one ends of the MOS tube Q1 and the resistor R3 are respectively and electrically connected with a signal ground GND, and the other end of the resistor R3 is electrically connected with an emitter of the triode Q2;
the CC detection circuit comprises an operational amplifier U2, resistors R21-R23, capacitors C12-C14, diodes D12-D13, a signal input end CC to be detected and a signal output end AI-CC, the signal input end CC to be detected, the diode D12 and the non-inverting input end of the operational amplifier U2 are sequentially and electrically connected in series, the inverting input end of the operational amplifier U2 is electrically connected with the output end, the output end of the operational amplifier U2, the resistor R23 and the signal output end AI-CC are sequentially and electrically connected in series, two ends of the capacitor C13, the resistor R22 and the diode D13 are electrically connected with the non-inverting input end of the operational amplifier U2 and the signal ground GND respectively, the non-inverting input end of the operational amplifier U2, the resistor R21, the capacitor C12 and the signal ground GND are sequentially connected in series, one end of the resistor R21 is electrically connected with a power supply D5V, and two ends of the capacitor C14 are respectively electrically connected with a signal ground GND and a signal output end AI-CC;
the CP awakening and activating power circuit comprises a positive electrode terminal BAT-P of a lead-acid battery, a negative electrode terminal GND of the lead-acid battery, capacitors C4-C11, diodes D5-D11, an inductor L1, resistors R15-R20, a fuse F3, an MOS tube Q4, triodes Q5-Q6, a DC/DC power chip, a key switch ON gear signal input end, an OBC auxiliary power input end CHG-AC, a direct current charging pile auxiliary power input end CHG-DC and a DELAY control input end DELAY-OFF, wherein the positive electrode terminal BAT-P of the lead-acid battery, the fuse F3, the MOS tube Q4, the resistor R16, the inductor L1, the DC/DC power chip and a power D5V are sequentially connected in series and electrically, the negative electrode terminal GND of the lead-acid battery is electrically connected with a GND signal ground, two ends of the capacitors C4 and C5 are respectively and electrically connected with the MOS tube Q4 and a signal ground, and one end of the negative electrode terminal GND 4 of the lead-acid battery is electrically connected with a GND C4, two ends of each of the capacitors C6-C10 and the diode D6 are respectively connected with the input end of a DC/DC power supply chip in parallel, the capacitors C6-C10, the diode D6 and the DC/DC power supply chip are respectively electrically connected with a signal ground GND, the MOS tube Q4, the resistor R19 and the CP power supply wake-up signal output end CP-PWM are sequentially and electrically connected in series, the ON gear signal input end of the key switch, the auxiliary power input end CHG-AC of the OBC and the auxiliary power input end CHG-DC of the direct current charging pile are respectively and electrically connected with the input ends of the diodes D7, D8 and D9, the output ends of the diodes D7, D8 and D9 are respectively and electrically connected with the resistor R17, the resistor R17 is connected with the base of the triode Q5, the collectors of the triodes Q5 and Q6 are respectively and electrically connected with one end of a resistor R19, the base of the triode Q6, the resistor R20 and the DELAY control input end AY-OFF are sequentially and electrically connected in series, the two ends of the resistor R18 and the two ends of the diode D10 are electrically connected with the base electrode and the emitter electrode of the triode Q5 respectively, the emitter electrodes of the resistor R18, the diode D10 and the triode Q5 are electrically connected with a signal ground GND respectively, the two ends of the diode D11 and the capacitor C11 are electrically connected with the base electrode and the emitter electrode of the triode Q6 respectively, and the emitter electrodes of the diode D11, the capacitor C11 and the triode Q6 are electrically connected with the signal ground GND respectively.
Further, when the switch S2 controls the signal input terminal CTR-CP to input a high level, the MOS transistor Q1 is turned on, and when the switch S2 controls the signal input terminal CTR-CP to input a low level, the MOS transistor Q1 is turned off.
Further, the pulse signal output end DI-CP and the control signal input end CTR-CP of the switch S2 are respectively and electrically connected with an I/O pin of the vehicle-mounted controller CPU.
Further, the signal output end AI-CC is electrically connected with an A/D pin of a vehicle-mounted controller CPU.
Further, the DC/DC power supply chip adopts a BUCK type DC/DC power supply chip.
By adopting the technical scheme of the invention, the invention has the following beneficial effects:
1. the alternating current charging control guide signal detection circuit can realize accurate detection of CC and CP signals, and avoids the problems of reliability and stability of alternating current charging;
2. the alternating current charging control guide signal detection circuit can achieve the functions of activating low-voltage power-on and delayed power-off of the vehicle-mounted controller by awakening the CP signal, and can achieve the purposes of delayed power-off and data storage through the CPU control logic when the vehicle-mounted controller is accidentally lost or powered off due to an external activation signal;
3. the short-circuit wire of the switch S2 is led out from the alternating current charging control guide signal detection circuit, so that the software control logic of the switch S2 can be avoided, and the detection circuit is convenient to use during debugging or emergency charging.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a block diagram of an AC charging electrical conduction and communication link;
fig. 2 is a schematic diagram of a CP detection circuit of a detection circuit for an ac charging control pilot signal of an electric vehicle according to the present invention;
fig. 3 is a schematic diagram of a CC detection circuit of a detection circuit for an ac charging control pilot signal of an electric vehicle according to the present invention;
fig. 4 is a schematic diagram of a CP wake-up activation power circuit of a detection circuit for an ac charging control pilot signal of an electric vehicle according to the present invention;
fig. 5 shows parameter specifications of all electronic components of the detection circuit for ac charging control pilot signals of an electric vehicle according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a detection circuit for an alternating current charging control guide signal of an electric automobile.
As shown in fig. 2 to 5, in an embodiment of the invention, the detection circuit of the ac charging control pilot signal of the electric vehicle includes a CP detection circuit, a CC detection circuit, and a CP wake-up activation power circuit.
As shown in fig. 2, the ac charging control pilot signal CP detection circuit is composed of an operational amplifier U1, diodes D1 to D4, triodes Q2 to Q3, a MOS transistor Q1, fuses F1 to F2, resistors R1 to R14, capacitors C1 to C3, and the like. CP is the signal input to be detected; DI-CP is pulse signal output after shaping and level conversion, and directly enters I/O pin of CPU for sampling; CP-PWM is the CP power supply wake-up signal output, acts on the power part of the vehicle-mounted controller; CTR-CP is the control signal input of the switch S2 (simulated by the MOS tube Q1); and S2-Jper is a short-circuit signal line of the switch S2 and is used for debugging or emergency use.
The diodes D1, D3 serve as signal isolation; the fuse F1 and the TVS tube D2 are used for front end overcurrent protection and overvoltage protection; resistors R1 and R2 and a MOS transistor Q1 are arranged according to the national standard of vehicle-mounted conduction charging GB/T18487.1-2015 electric vehicle conduction charging system-part 1: the rule of an appendix A control guide circuit schematic diagram in the general requirements is set, the voltage amplitude of the detection point 1 and the voltage amplitude of the detection point 2 are changed through the connection state of the vehicle interface and the control of a switch S2, and then the charging process is guided to be carried out; the resistors R3, R7, R8 and the triode Q2 are driving circuits of an MOS transistor Q1, an I/O pin of a CPU is directly connected to a CTR-CP end, the CTR-CP end is controlled by software, when a high level is input, the MOS transistor Q1 is switched on, and when a low level is input, the MOS transistor Q1 is switched off; S2-Jper is a short-circuit signal wire of the switch S2, if the S2-Jper lead is directly short-circuited to the signal ground GND, the control logic of the switch S2 is equivalently avoided, and the simulation S2 is forcibly closed, so that the emergency charging circuit can be used for debugging or emergency charging.
The operational amplifier U1, the resistors R9-R14 and the capacitors C2-C3 jointly form a shaping filter circuit of the CP pulse signal, the operational amplifier U1 is the core of a comparator, the CP pulse signal with the amplitude of 12Vdc is shaped into the CP pulse signal with the amplitude of 5Vdc, and then the CP pulse signal enters an I/O pin of a CPU for sampling; the resistors R4-R6, the capacitor C1, the diode D4 and the triode Q3 form a CP awakening activation signal output together, and the CP awakening activation signal output enters a power supply part to awaken the vehicle-mounted controller to be powered on at low voltage.
As shown in fig. 3, the ac charging control pilot signal CC detection circuit is composed of an operational amplifier U2, resistors R21 to R23, capacitors C12 to C14, diodes D12 and D13. CC is a signal input to be detected; and the AI-CC is output after signal conditioning and directly enters an A/D pin of the CPU for sampling. The resistors R21 and R22 form a signal input voltage division conditioning circuit; the operational amplifier U2 is an emitter follower, has the function of enhancing the rear-end loading capacity, and selects the operational amplifier with low offset voltage, low bias current and low noise as much as possible in order to improve the sampling precision; the diodes D12 and D13 are used for protecting the input pin of the operational amplifier; the resistor R23 and the capacitor C14 are low-pass filters for filtering high-frequency noise and interference.
As shown in fig. 4, the main function of the ac charging control pilot signal CP to wake up and activate the power supply circuit is to realize dc conversion from a 12Vdc or 24Vdc power supply to a 5Vdc power supply of the vehicle-mounted lead-acid battery, and to provide a working power supply for the CPU control circuit, the signal conditioning circuit, the communication circuit, the signal detection circuit, and the like. Generally speaking, a power supply loop of an ON-board controller is directly connected to two poles of a positive (BAT-P) and a negative (GND) of a lead-acid battery, but at least one of an ON-gear signal of a key switch, an OBC auxiliary power supply CHG-AC signal and a direct current charging pile auxiliary power supply CHG-DC signal needs to be activated and awakened to be powered ON for work, and besides, in an alternating current conduction charging process, the ON-board controller needs to be compatible with a CC or CP signal awakening function to ensure that a gun can be identified, can be used for shaking hands and can be charged. In the power supply circuit of fig. 4, the MOS transistor Q4 is located on the input loop of the BUCK power supply chip, and the power supply chip will only start to operate when the transistor Q5 or Q6 is turned on, or the transistor Q3 in fig. 2 is turned on. The key switch ON gear signal, the OBC auxiliary power supply CHG-AC signal and the direct current charging pile auxiliary power supply CHG-DC signal are respectively isolated by the reflux diodes D7, D8 and D9 and then act ON the triode Q5; the CP pulse signal acts on the triode Q3; the control level of an I/O pin of the CPU acts on a triode Q6, the Q6 is set to increase the function of delayed power failure of a power supply part, and when the vehicle-mounted controller is accidentally lost or powered OFF due to an external activation signal, the DELAY-OFF input level can be controlled by the CPU to achieve the purposes of delayed power failure and data storage.
All the electronic component parameter specifications of the detection circuit for the alternating current charging control guide signal of the electric vehicle are shown in fig. 5.
Specifically, the invention provides a detection circuit of an alternating current charging control guide signal aiming at the problem that the alternating current charging reliability and stability of the electric automobile in the current market are poor, and the CC and CP signal sampling precision is improved and the alternating current charging reliability and stability are greatly improved by optimizing electronic components and ingenious circuit design. Meanwhile, the short-circuit wire of the switch S2 is led out from the detection circuit, and when the short-circuit wire is used for equipment debugging or emergency charging, the short-circuit wire can be directly connected with a signal ground to avoid the software control logic of the switch S2, so that the detection circuit is convenient to flexibly apply on site. In addition, the alternating current charging control guide signal detection circuit provided by the invention can also realize the functions of activating the low-voltage power-on and delayed power-off of the vehicle-mounted controller by the CP signal awakening, and when the vehicle-mounted controller is accidentally lost or powered off due to an external activation signal, the purposes of delayed power-off and data storage can be achieved through the CPU control logic.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (5)

1. A detection circuit for an alternating current charging control guide signal of an electric vehicle is characterized by comprising a CP detection circuit, wherein the CP detection circuit comprises operational amplifiers U1, diodes D1-D4, MOS transistors Q1, triodes Q2-Q3, fuses F1-F2, resistors R1-R14, capacitors C1-C3, a signal input end CP to be detected, a pulse signal output end DI-CP, a CP power supply wake-up signal output end CP-PWM, a control signal input end CTR-CP of a switch S2 and a short-circuit signal input end S2-Jper of a switch S2, the signal input end CP to be detected, the diode D1, the fuse F1, the diode D3, the resistor R4, the triode Q4 and the CP power supply wake-up signal output end CP-PWM are sequentially and electrically connected in series, two ends of the resistor R4 are respectively and an inverting input end of the operational amplifier U4, the other end of the resistor R11 is electrically connected with a signal ground GND, the other end of the resistor R12 is electrically connected with a power supply D5V, the two ends of the capacitor C2 are respectively electrically connected with a resistor R12 and the signal ground GND, the two ends of the resistor R10 are respectively electrically connected with the inverting input end of the operational amplifier U1 and the signal ground GND, the two ends of the resistor R14 and the capacitor C3 are respectively electrically connected with the pulse signal output end DI-CP and the signal ground GND, the two ends of the diode D2 and the resistor R1 are respectively electrically connected with the input end of the diode D3 and the signal ground GND, the two ends of the capacitor C1 are respectively electrically connected with the resistor R4 and the signal ground GND, the one end of the resistor R6 and the input end of the diode D4 are respectively electrically connected with the signal ground GND, the other end of the resistor R6 and the output end of the diode D4 are respectively electrically connected with the triode Q3, the input end of the diode D3, the resistor R2, the fuse F2 and the switch S2 are sequentially electrically connected in series with the signal input end of the signal ground 2-per, the resistor R2, the MOS tube Q1 and an emitter of the triode Q2 are sequentially and electrically connected in series, a base of the triode Q2, the resistor R8 and the control signal input end CTR-CP of the switch S2 are sequentially and electrically connected in series, a collector of the triode Q2, the resistor R7 and the power supply D5V are sequentially and electrically connected in series, one ends of the MOS tube Q1 and the resistor R3 are respectively and electrically connected with a signal ground GND, and the other end of the resistor R3 is electrically connected with the emitter of the triode Q2;
the CC detection circuit comprises an operational amplifier U2, resistors R21-R23, capacitors C12-C14, diodes D12-D13, a signal input end CC to be detected and a signal output end AI-CC, the signal input end CC to be detected, the diode D12 and the non-inverting input end of the operational amplifier U2 are sequentially and electrically connected in series, the inverting input end of the operational amplifier U2 is electrically connected with the output end, the output end of the operational amplifier U2, the resistor R23 and the signal output end AI-CC are sequentially and electrically connected in series, two ends of the capacitor C13, the resistor R22 and the diode D13 are electrically connected with the non-inverting input end of the operational amplifier U2 and the signal ground GND respectively, the non-inverting input end of the operational amplifier U2, the resistor R21, the capacitor C12 and the signal ground GND are sequentially connected in series, one end of the resistor R21 is electrically connected with a power supply D5V, and two ends of the capacitor C14 are respectively electrically connected with a signal ground GND and a signal output end AI-CC;
the CP awakening and activating power circuit comprises a positive electrode terminal BAT-P of a lead-acid battery, a negative electrode terminal GND of the lead-acid battery, capacitors C4-C11, diodes D5-D11, an inductor L1, resistors R15-R20, a fuse F3, an MOS tube Q4, triodes Q5-Q6, a DC/DC power chip, a key switch ON gear signal input end, an OBC auxiliary power input end CHG-AC, a direct current charging pile auxiliary power input end CHG-DC and a DELAY control input end DELAY-OFF, wherein the positive electrode terminal BAT-P of the lead-acid battery, the fuse F3, the MOS tube Q4, the resistor R16, the inductor L1, the DC/DC power chip and a power D5V are sequentially connected in series and electrically, the negative electrode terminal GND of the lead-acid battery is electrically connected with a GND signal ground, two ends of the capacitors C4 and C5 are respectively and electrically connected with the MOS tube Q4 and a signal ground, and one end of the negative electrode terminal GND 4 of the lead-acid battery is electrically connected with a GND C4, two ends of each of the capacitors C6-C10 and the diode D6 are respectively connected with the input end of a DC/DC power supply chip in parallel, the capacitors C6-C10, the diode D6 and the DC/DC power supply chip are respectively electrically connected with a signal ground GND, the MOS tube Q4, the resistor R19 and the CP power supply wake-up signal output end CP-PWM are sequentially and electrically connected in series, the ON gear signal input end of the key switch, the auxiliary power input end CHG-AC of the OBC and the auxiliary power input end CHG-DC of the direct current charging pile are respectively and electrically connected with the input ends of the diodes D7, D8 and D9, the output ends of the diodes D7, D8 and D9 are respectively and electrically connected with the resistor R17, the resistor R17 is connected with the base of the triode Q5, the collectors of the triodes Q5 and Q6 are respectively and electrically connected with one end of a resistor R19, the base of the triode Q6, the resistor R20 and the DELAY control input end AY-OFF are sequentially and electrically connected in series, the two ends of the resistor R18 and the two ends of the diode D10 are electrically connected with the base electrode and the emitter electrode of the triode Q5 respectively, the emitter electrodes of the resistor R18, the diode D10 and the triode Q5 are electrically connected with a signal ground GND respectively, the two ends of the diode D11 and the capacitor C11 are electrically connected with the base electrode and the emitter electrode of the triode Q6 respectively, and the emitter electrodes of the diode D11, the capacitor C11 and the triode Q6 are electrically connected with the signal ground GND respectively.
2. The detection circuit for the AC charging control pilot signal of the electric vehicle as claimed in claim 1, wherein the MOS transistor Q1 is turned on when the control signal input terminal CTR-CP of the switch S2 is inputted with a high level, and the MOS transistor Q1 is turned off when the control signal input terminal CTR-CP of the switch S2 is inputted with a low level.
3. The detection circuit for the AC charging control pilot signal of the electric automobile as claimed in claim 1, wherein the pulse signal output terminal DI-CP and the control signal input terminal CTR-CP of the switch S2 are electrically connected to the I/O pin of the CPU of the vehicle controller respectively.
4. The detection circuit of the AC charging control pilot signal of the electric automobile as claimed in claim 1, wherein the signal output terminal AI-CC is electrically connected to the A/D pin of the vehicle-mounted controller CPU.
5. The detection circuit of the AC charging control pilot signal of the electric automobile as claimed in claim 1, wherein the DC/DC power chip is BUCK type DC/DC power chip.
CN202111292835.5A 2021-11-03 2021-11-03 Detection circuit for alternating current charging control guide signal of electric automobile Pending CN114062805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111292835.5A CN114062805A (en) 2021-11-03 2021-11-03 Detection circuit for alternating current charging control guide signal of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111292835.5A CN114062805A (en) 2021-11-03 2021-11-03 Detection circuit for alternating current charging control guide signal of electric automobile

Publications (1)

Publication Number Publication Date
CN114062805A true CN114062805A (en) 2022-02-18

Family

ID=80273583

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111292835.5A Pending CN114062805A (en) 2021-11-03 2021-11-03 Detection circuit for alternating current charging control guide signal of electric automobile

Country Status (1)

Country Link
CN (1) CN114062805A (en)

Similar Documents

Publication Publication Date Title
WO2018126634A1 (en) Detection method and device of charging switch of electric vehicle
CN203278368U (en) Charger
CN219086837U (en) Electric automobile super quick charge awakens up and detection circuit
CN114062805A (en) Detection circuit for alternating current charging control guide signal of electric automobile
CN217587405U (en) Detection circuit for alternating current charging control guide signal of electric automobile
CN103738268B (en) A kind of automobile static current control device
CN109334503B (en) Automobile charging pile control module
CN203331853U (en) Buffer switch circuit of electromobile
CN105515112A (en) Low-power-consumption charging control system
CN102570527A (en) Solar power supply device for automobile air conditioner
CN112865271B (en) Controller circuit for alternating-current charging pile
CN215398261U (en) Automobile with a detachable front cover
CN205573656U (en) Adopt new energy automobile of V2H technique with fill discharge protection function
CN208421672U (en) A kind of gateway simulation resolver power circuit for new-energy automobile
CN103399198A (en) Current sensor auxiliary device having SOC (system on chip) computing function
CN213302448U (en) Electric automobile charging switch detecting system
CN221100999U (en) Car end CP diode short circuit detection circuit
CN220730366U (en) Three-phase alternating-current charging pile relay control and adhesion detection circuit
CN219382251U (en) Alternating-current reservation charging and vehicle awakening circuit
CN203504413U (en) Circuit capable of automatically transforming polarity
CN104701921A (en) Power supply control unit for electric vehicles
CN204030701U (en) Intelligent PCM voltage regulator
CN103350671A (en) Switch buffer circuit used for electromobile
CN2225397Y (en) Electronic voltage regulator for automobile
CN217705546U (en) CP (CP) wake-up circuit of electric automobile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination