CN115603434B - Non-inductive charging system of electric automobile - Google Patents

Non-inductive charging system of electric automobile Download PDF

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Publication number
CN115603434B
CN115603434B CN202211170076.XA CN202211170076A CN115603434B CN 115603434 B CN115603434 B CN 115603434B CN 202211170076 A CN202211170076 A CN 202211170076A CN 115603434 B CN115603434 B CN 115603434B
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resistor
mos tube
diode
electrode
grounded
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CN115603434A (en
Inventor
李健
郑城市
姚佳
张占喜
王毛
史亚京
张亚栋
张南
谢胜男
樊帅
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Jiyuan Power Supply Co of State Grid Henan Electric Power Co Ltd
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Jiyuan Power Supply Co of State Grid Henan Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • 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
    • B60L53/12—Inductive energy transfer
    • 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
    • B60L53/12—Inductive energy transfer
    • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • 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

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

Abstract

The application relates to an electric automobile non-inductive charging system, which comprises an anti-interference self-calibration circuit, a continuous stable charging circuit and a voltage monitoring protection circuit. The anti-interference self-calibration circuit can filter noise output by a power grid so as to reduce electromagnetic crosstalk generated by a power line to a battery car charging system; the continuous stable charging circuit has the functions of noise filtering, voltage transformation, rectification, voltage stabilization and the like, and can generate continuous stable direct-current voltage signals to be provided for the lead storage battery of the battery car for charging; the voltage monitoring and protecting circuit can monitor and protect the voltage and the temperature of the storage battery in the charging process.

Description

Non-inductive charging system of electric automobile
Technical Field
The application relates to the field of electric automobile and battery charging, in particular to an electric automobile non-inductive charging system.
Background
With the increasing promotion of economy and comprehensive national force, the environmental pollution problem encountered in the social development is also increasingly prominent. So in recent years, along with the carbon neutralization and the carbon peak reaching task in China, the green low-carbon environmental protection concept is also more interesting. Compared with the traditional automobile, the electric automobile is popular with the masses due to the good environment-friendly performance. The vehicle battery charging system of the electric vehicle is one of the bottleneck problems restricting the development of the vehicle battery charging system. Because the charging system not only can influence the service life of the vehicle-mounted battery, but also is related to the problems of convenience, efficiency, speed and the like in the automobile charging process. Therefore, research on the non-inductive charging system of the electric automobile is very important.
As shown in fig. 1, the harmonic filter circuit in the prior art uses two-stage LC filtering, and has weak noise reduction capability and poor stability.
As shown in fig. 2, the voltage monitoring circuit in the prior art adopts a single triode common emitter amplifying structure, and has low detection precision and poor safety.
Disclosure of Invention
First technical problem
1. The charging system in the prior art has poor noise reduction capability to the power grid and poor working stability.
2. The charging system in the prior art has low signal monitoring precision, low charging efficiency and poor safety.
(II) technical scheme
Aiming at the technical problems, the application provides an electric automobile non-inductive charging system which comprises an anti-interference self-calibration circuit, a continuous stable charging circuit and a voltage monitoring protection circuit which are connected in sequence.
The electric automobile non-inductive charging system mainly introduces an anti-noise interference, automatic calibration and vehicle-mounted storage battery electric quantity and temperature monitoring circuit on a traditional charging circuit. The working principle of the whole circuit system is that mains supply firstly enters a noise filter circuit to reduce electromagnetic crosstalk generated by a power line to a battery car charging system; then, sine alternating current flows into a power supply transformation and rectification circuit to be converted into direct current signals by alternating current signals, and meanwhile, the direct current signal outgoing position is introduced into a phase automatic calibration radio frequency circuit to feed back and correct the phenomenon that waves are distorted in the conversion process so as to improve the charging efficiency of the circuit; then, the direct current signal generated by the rectifying and filtering circuit flows into the voltage stabilizing and reducing circuit to generate a continuous and stable direct current voltage signal which is provided for the lead storage battery of the battery car to charge. Meanwhile, the power supply noninductive system introduces high-precision voltage and temperature monitoring circuits at two ends of the storage battery, when the storage battery is about to be fully charged, the charging system can be automatically adjusted to a trickle charging mode to complete the charging of the residual electric quantity of the battery and then automatically adopts a forging mode, and meanwhile, once the temperature of the battery exceeds a set safety range in the charging process, the system automatically pauses the charging process until the temperature of the storage battery is recovered to be normal.
In the anti-interference self-calibration circuit, the inductor L1 is a common-mode inductor, and the inductor L2 is a series-mode inductor. The inductance L1 does not work on the series mode interference in the circuit when working normally, but when the common mode interference occurs, the total inductance is increased rapidly after coupling because the magnetic flux directions of the two coils of the T1 are the same, and the common mode signal has very large impedance, so that the common mode signal is not easy to pass. While L2 does not act on common mode interference, and the capacitor C1 and the capacitor C4 are mainly used for filtering out cross mode interference by adopting a film capacitor; the capacitor C2 and the capacitor C3 are connected with the output end in a bridging way, and the midpoints of the two capacitors are connected to the ground, so that the functions of effectively inhibiting common mode interference, reducing leakage current and the like can be achieved. Therefore, a circuit structure capable of effectively filtering electromagnetic interference pulses from a commercial power grid is added in front of the charger transformer, and stable and efficient operation of the electric automobile charging system can be well ensured.
The continuous stable charging circuit mainly comprises voltage transformation, rectification, filtering and voltage stabilization. Firstly, alternating current firstly flows into a transformer T2 after passing through a filtering charging protection circuit to change the voltage into the required voltage, then flows into a rectifier bridge consisting of 4 diodes D7, D8, D9 and D10 and outputs a direct current signal, then the alternating current passes through a boost inductor L3 to select the ripple size and harmonic distortion of the output voltage, the signal ripple and the current passing through the inductor are maximum, the charging efficiency of the charging circuit is greatly improved, then the alternating current flows into an output capacitor C5 to maintain the continuous stable duration of the output voltage of the rectifier circuit, and meanwhile, the capacitor C5 can also filter the ripple wave of the jump of the output voltage of the rectifier circuit caused by the operation of a MOS tube Q4. The voltage signal is firstly automatically calibrated by 2 feedback resistors R1 and R2, distortion signals generated in the alternating current-direct current conversion process are automatically calibrated, then a voltage-reducing and voltage-stabilizing circuit flows into a V1 end to reduce and stabilize voltage, the partial circuit is composed of a voltage-stabilizing diode D6, an inductor L4 and a capacitor C8, an LC high-frequency rectification filter circuit is embedded into a MOS tube Q13 to finally form a voltage comparison control circuit, an NPN triode Q14 is controlled and regulated by the output voltage of the MOS tube Q13, the voltage V1 output by the rectification filter circuit is changed into rectangular wave voltage, at the moment, the diode D6 bears reverse voltage and stops, current in a load passes through, the inductor L4 starts to charge and store energy, meanwhile, the capacitor C8 charges, when the collector voltage of the triode Q18 is the source voltage of the MOS tube Q13, the triode Q14 is turned into cut-off by conduction, the filter inductor generates automatic induction electromotive force to enable the diode D6 to be conducted, the energy stored in the inductor L4 is released to a load resistor R0 through the diode D6 to continuously maintain the charging process, and when the voltage at the V1 end or the load R0 changes, and the voltage of the automatic load R0 changes, so that the voltage of the constant voltage-stabilizing circuit can continuously maintain the constant duty cycle to change, and the voltage of the charging system can reach stable voltage.
The voltage monitoring and protecting circuit is mainly used for monitoring and protecting the voltage and the temperature of the storage battery in the charging process. The reverse phase voltage comparison circuit formed by the MOS transistors Q16 and Q17 is used for monitoring the voltage of the storage battery. The voltage of the storage battery of the electric automobile is led into the source electrode of the MOS tube Q17 from the Vo end by RP, and is output through a differential circuit formed by the storage battery and the MOS tube Q15, when the voltage output by the MOS tube Q15 is higher than the voltage of the diode D3 end, the triode Q1 is conducted, the light-emitting diode D3 lights the storage battery to reach a preset voltage value, and meanwhile, the resistance of the photoresistor R11 is influenced by the diode D3 to change so as to control the conduction control relay module of the triode Q2 and the triode Q3, so that the charging system enters a trickle mode. Meanwhile, the charging system is controlled by the thermistor R11, and if the charging temperature rises above a preset value, an internal thermal feedback loop will reduce the set charging current. The output current of the temperature amplifier flowing through the power MOS tube Q5 is reduced, the temperature is reduced, and finally high-precision charging monitoring is realized.
(III) beneficial effects
Firstly, electromagnetic crosstalk between the electric automobile and alternating current of a power grid is greatly reduced, and working stability of the charging system is improved; secondly, can realize the noninductive high accuracy monitoring of charging process, improve charging system's charging efficiency and safe degree.
Drawings
Fig. 1 is a prior art harmonic filter circuit.
Fig. 2 is a prior art voltage monitoring circuit.
FIG. 3 is a schematic diagram of an anti-interference self-calibration circuit of the present application.
Fig. 4 is a continuous stable charging circuit of the present application.
Fig. 5 is a voltage monitoring protection circuit of the present application.
Description of the embodiments
The invention is further illustrated below with reference to examples.
As shown in fig. 3, 4 and 5, the application provides an electric automobile non-inductive charging system, which comprises an anti-interference self-calibration circuit, a continuous stable charging circuit and a voltage monitoring protection circuit which are connected in sequence.
In the anti-interference self-calibration circuit, the inductor L1 is a common-mode inductor, and the inductor L2 is a series-mode inductor. The inductance L1 does not work on the series mode interference in the circuit when working normally, but when the common mode interference occurs, the total inductance is increased rapidly after coupling because the magnetic flux directions of the two coils of the T1 are the same, and the common mode signal has very large impedance, so that the common mode signal is not easy to pass. While L2 does not act on common mode interference, and the capacitor C1 and the capacitor C4 are mainly used for filtering out cross mode interference by adopting a film capacitor; the capacitor C2 and the capacitor C3 are connected with the output end in a bridging way, and the midpoints of the two capacitors are connected to the ground, so that the functions of effectively inhibiting common mode interference, reducing leakage current and the like can be achieved. Therefore, a circuit structure capable of effectively filtering electromagnetic interference pulses from a commercial power grid is added in front of the charger transformer, and stable and efficient operation of the electric automobile charging system can be well ensured.
Specifically, the anti-interference self-calibration circuit comprises a transformer T1, inductors L1 and L2, capacitors C1, C2, C3 and C4, and a transformer T2, wherein one end of the capacitor C1 in the anti-interference self-calibration circuit is connected with a positive end of a primary coil of the transformer T1, the other end of the capacitor is connected with a positive end of a secondary coil of the transformer T1, a negative end of the primary coil of the transformer T1 is respectively connected with one end of the inductor L1 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is respectively connected with one end of the capacitor C4 and a positive end of the primary coil of the transformer T2, the other end of the capacitor C4 is respectively connected with one end of the inductor L2 and a negative end of the primary coil of the transformer T2, the other end of the inductor L2 is respectively connected with one end of the capacitor C3 and the negative end of the secondary coil of the transformer T1, and the other end of the capacitor C3 is grounded.
The continuous stable charging circuit mainly comprises voltage transformation, rectification, filtering and voltage stabilization. Firstly, alternating current firstly flows into a transformer T2 after passing through a filtering charging protection circuit to change the voltage into the required voltage, then flows into a rectifier bridge formed by 4 diodes D7, D8, D9 and D10 and outputs a direct current signal, then the direct current signal passes through a boost inductor L3 to select the ripple size and harmonic distortion of the output voltage, the signal ripple and circuit passing through the inductor are maximum, the charging efficiency of the charging circuit is greatly improved, then the alternating current flows into an output capacitor C5 to maintain the continuous stable duration of the output voltage of the rectifier circuit, and meanwhile, the capacitor C5 can also filter the ripple wave of the jump of the output voltage of the rectifier circuit caused by the operation of a MOS tube Q4. The voltage signal is firstly automatically calibrated by 2 feedback resistors R1 and R2, distortion signals generated in the alternating current-direct current conversion process are automatically calibrated, then a voltage-reducing and voltage-stabilizing circuit flows into a V1 end to reduce and stabilize voltage, the partial circuit is composed of a voltage-stabilizing diode D6, an inductor L4 and a capacitor C8, an LC high-frequency rectification filter circuit is embedded into a MOS tube Q13 to finally form a voltage comparison control circuit, an NPN triode Q14 is controlled and regulated by the output voltage of the MOS tube Q13, the voltage V1 output by the rectification filter circuit is changed into rectangular wave voltage, at the moment, the diode D6 bears reverse voltage and stops, current in a load passes through, the inductor L4 starts to charge and store energy, meanwhile, the capacitor C8 charges, when the collector voltage of the triode Q18 is the source voltage of the MOS tube Q13, the triode Q14 is turned into cut-off by conduction, the filter inductor generates automatic induction electromotive force to enable the diode D6 to be conducted, the energy stored in the inductor L4 is released to a load resistor R0 through the diode D6 to continuously maintain the charging process, and when the voltage at the V1 end or the load R0 changes, and the voltage of the automatic load R0 changes, so that the voltage of the constant voltage-stabilizing circuit can continuously maintain the constant duty cycle to change, and the voltage of the charging system can reach stable voltage.
Specifically, the continuous stable charging circuit comprises a transformer T2, a port V1, diodes D8, D7, D9, D10, D2, D17, D19 and D18, MOS transistors Q4, Q19, Q20, Q23, Q24, Q21 and Q22, capacitors C5, C7 and C9, resistors R1, R2, R3, R14 and R15, wherein the positive phase end of a secondary coil of the transformer T2 is respectively connected with the negative pole of the diode D8 and the positive pole of the diode D7, the positive pole of the diode D8 is respectively connected with the positive pole of the diode D9, one end of the resistor R3 and one end of the capacitor C7, the negative pole of the diode D9 is respectively connected with the negative phase end of the secondary coil of the transformer T2 and the positive pole of the diode D10, the other end of the resistor R3 is grounded, the other end of the capacitor C7 is respectively connected with one end of the resistor R15, the other end of the resistor R15 is respectively connected with one end of the resistor R14 and one end of the positive pole of the diode D17, the resistor R14 is respectively connected with one end of R1 and the other end of the resistor R2, the other end of the resistor R2 is a port V1 and is respectively connected with the cathode of the diode D2 and one end of the capacitor C5, the other end of the resistor R1 is grounded, the other end of the capacitor C5 is grounded, the cathode of the diode D10 is respectively connected with the cathode of the diode D7 and one end of the inductor L3, the other end of the inductor L3 is respectively connected with the drain end of the MOS tube Q4 and the anode of the diode D2, the source end of the MOS tube Q4 is grounded, the grid electrode of the MOS tube Q4 is respectively connected with the high level VCC and the drain end of the MOS tube Q24, the grid electrode of the MOS tube Q24 is respectively connected with the anode of the diode D18, the anode of the capacitor C9 and the grid electrode of the MOS tube Q23, the source end of the MOS tube Q24 is grounded, the drain end of the MOS tube Q23 is respectively connected with the cathode of the diode D18, the cathode of the MOS tube Q19 and the grid electrode of the MOS tube Q20, the drain end of the MOS tube Q20 is respectively connected with the high level VCC and the anode of the diode D19, the drain terminal of the MOS tube Q19 is connected, the source terminal of the MOS tube Q23 is grounded, the source terminal of the MOS tube Q20 is connected with the drain terminal of the MOS tube Q22, the grid electrode of the MOS tube Q22 is respectively connected with the source terminal of the MOS tube Q19, the grid electrode of the MOS tube Q21 and the drain terminal of the MOS tube Q21, the source terminal of the MOS tube Q22 is grounded, and the source terminal of the MOS tube Q21 is grounded. The continuous stable charging circuit comprises ports V1 and V3, MOS transistors Q9, Q6, Q7, Q11, Q12 and Q13, triodes Q14, Q18 diodes D11, D13, D14, D12 and D6, an inductor L4, a capacitor C8, resistors R21, R20, ro and R19, wherein the port V1 in the continuous stable charging circuit is connected with a collector of the triode Q14, an emitter of the triode Q14 is respectively connected with one end of the inductor L4 and a cathode of the diode D6, the other end of the inductor L4 is respectively connected with an anode of the capacitor C8, one end of the resistor R19 and one end of the resistor R21, the cathode of the capacitor C8 is grounded, the other end of the resistor R19 is respectively connected with one end of the resistor R20 and a source end of the MOS transistor Q9, the other end of the resistor R21 is grounded, an emitter of the triode Q18 is a port Vo and is connected with one end of the resistor Ro, the other end of the resistor is grounded, the base of the triode Q18 is a port V3, the positive electrode of the diode D6 is grounded, the base electrode of the triode Q14 is connected with the drain end of the MOS tube Q13, the source electrode of the MOS tube Q13 is grounded, the grid electrode of the MOS tube Q13 is respectively connected with the positive electrode of the diode D12 and the grid electrode of the MOS tube Q11, the source electrode of the MOS tube Q11 is respectively connected with the negative electrode of the diode D12, the negative electrode of the diode D13 and the grid electrode of the MOS tube Q12, the drain electrode of the MOS tube Q11 is connected with the high level VCC, the positive electrode of the diode D13 is connected with the high level VCC, the drain end of the MOS tube Q12 is connected with the drain end of the MOS tube Q7, the grid electrode of the MOS tube Q7 is respectively connected with the grid electrode of the MOS tube Q6, the drain end of the MOS tube Q6 and the source electrode of the MOS tube Q8, the source electrode of the MOS tube Q7 is grounded, the source electrode of the MOS tube Q6 is grounded, the drain electrode of the MOS tube Q8 is connected with the negative electrode of the diode D14 and the drain electrode of the MOS tube Q9 is connected with the drain electrode of the MOS tube Q9, the positive electrode of the diode D14 is connected to the high level VCC, and the positive electrode of the diode D11 is connected to the gate of the MOS transistor Q9.
The voltage monitoring and protecting circuit is mainly used for monitoring and protecting the voltage and the temperature of the storage battery in the charging process. The reverse phase voltage comparison circuit formed by the MOS transistors Q16 and Q17 is used for monitoring the voltage of the storage battery. The voltage of the storage battery of the electric automobile is led into the source electrode of the MOS tube Q17 from the Vo end by RP, and is output through a differential circuit formed by the storage battery and the MOS tube Q15, when the voltage output by the MOS tube Q15 is higher than the voltage of the diode D3 end, the triode Q1 is conducted, the light-emitting diode D3 lights the storage battery to reach a preset voltage value, and meanwhile, the resistance of the photoresistor R11 is influenced by the diode D3 to change so as to control the conduction control relay module of the triode Q2 and the triode Q3, so that the charging system enters a trickle mode. At the same time, the charging system is controlled by a thermistor, and if the charging temperature rises above a preset value, an internal thermal feedback loop will reduce the set charging current. The output current of the temperature amplifier flowing through the power MOS tube Q5 is reduced, the temperature is reduced, and finally high-precision charging monitoring is realized.
Specifically, the voltage monitoring protection circuit includes a port Vo, diodes D4, D15, D16, VD1, MOS transistors Q16, Q17, Q15, resistors R6, R9, and a potentiometer, wherein the port Vo is connected to one end of a resistor of the potentiometer RP, the other end of the resistor of the potentiometer RP is grounded, a sliding vane end of the potentiometer RP is connected to an anode of the diode D16, a cathode of the diode D16 is connected to a gate of the MOS transistor Q17, a drain end of the MOS transistor Q17 is connected to a cathode of the diode D4, a drain end of the MOS transistor Q16, a drain end of the MOS transistor Q15, and one end of the resistor R6, the other end of the resistor R6 is connected to an anode of the diode D15 and a cathode of the diode VD1, the anode of the diode D15 is connected to a gate of the MOS transistor Q16, the source end of the MOS transistor Q17 is grounded, the source end of the MOS transistor Q15 is grounded, and the anode of the diode D4 is connected to the other end of the resistor R9, and the other end of the resistor is connected to a high voltage VCC level. The voltage monitoring protection circuit comprises a MOS transistor Q15, a switch K3, a wire winding resistor S2, triodes Q1, Q2 and Q3, diodes D20 and D3, resistors R7, R8, R12, R13 and R11, wherein the positive electrode of the diode D3 in the voltage monitoring protection circuit is connected with the drain end of the MOS transistor Q15, the negative electrode of the diode D3 is connected with one end of the resistor R8, the other end of the resistor R8 is connected with the collector of the triode Q1, the emitter of the triode Q1 is grounded, one end of the resistor R7 is connected with the grid electrode of the MOS transistor Q15, the other end of the resistor R7 is connected with the base electrode of the triode Q1, one end of the resistor R10 is connected with a high level VCC, the other end of the resistor R10 is connected with one end of the resistor R12, one end of the resistor R13 is grounded, the other end of the resistor R12 is connected with the base electrode of the triode Q2, the collector of the triode Q2 is connected with one end of the wire winding resistor S2, the No. 2 interface of the resistor Q3, the other end of the resistor V3 is connected with the collector of the wire winding resistor Q2, the other end of the resistor Q3 is connected with the base electrode of the VCC 3, the other end of the resistor is connected with the base electrode of the resistor R3, the other end of the resistor is connected with the base electrode of the resistor 3 is connected with the resistor Q25, the other end of the resistor is connected with the base electrode of the resistor 3, the resistor is connected with the resistor 3, the other end of the resistor is connected with the end of the resistor and the resistor is connected with the resistor and the end with the end of the 3 and the end of the 3.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.

Claims (1)

1. The electric automobile non-inductive charging system comprises an anti-interference self-calibration circuit, a continuous stable charging circuit and a voltage monitoring protection circuit which are connected in sequence, and is characterized in that: the anti-interference self-calibration circuit comprises a transformer T1, inductors L1 and L2, capacitors C1, C2, C3 and C4 and a transformer T2, wherein one end of the capacitor C1 in the anti-interference self-calibration circuit is connected with a positive phase end of a primary coil of the transformer T1, the other end of the capacitor is connected with a positive phase end of a secondary coil of the transformer T1, a negative phase end of the primary coil of the transformer T1 is respectively connected with one end of the inductor L1 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is respectively connected with one end of the capacitor C4 and the positive phase end of the primary coil of the transformer T2, the other end of the capacitor C4 is respectively connected with one end of the inductor L2 and the negative phase end of the secondary coil of the transformer T1, and the other end of the capacitor C3 is grounded;
the continuous stable charging circuit comprises a transformer T2, a port V1, diodes D8, D7, D9, D10, D2, D17, D19 and D18, MOS transistors Q4, Q19, Q20, Q23, Q24, Q21 and Q22, capacitors C5, C7 and C9, resistors R1, R2, R3, R14 and R15, wherein the positive phase end of a secondary coil of the transformer T2 is respectively connected with the negative pole of the diode D8 and the positive pole of the diode D7, the positive pole of the diode D8 is respectively connected with the positive pole of the diode D9, one end of the resistor R3 and one end of the capacitor C7, the negative pole of the diode D9 is respectively connected with the negative phase end of the secondary coil of the transformer T2 and the positive pole of the diode D10, the other end of the resistor R3 is grounded, the other end of the resistor C7 is respectively connected with one end of the resistor R15, the other end of the resistor R15 is respectively connected with one end of the resistor R14 and the positive pole of the diode D17, one end of the resistor R14 is respectively connected with one end of the resistor R1 and one end of the resistor R14, the other end of the resistor R2 is a port V1 and is respectively connected with the cathode of the diode D2 and one end of the capacitor C5, the other end of the resistor R1 is grounded, the other end of the capacitor C5 is grounded, the cathode of the diode D10 is respectively connected with the cathode of the diode D7 and one end of the inductor L3, the other end of the inductor L3 is respectively connected with the drain end of the MOS tube Q4 and the anode of the diode D2, the source end of the MOS tube Q4 is grounded, the grid electrode of the MOS tube Q4 is respectively connected with the high level VCC and the drain end of the MOS tube Q24, the grid electrode of the MOS tube Q24 is respectively connected with the anode of the diode D18, the anode of the capacitor C9 and the grid electrode of the MOS tube Q23, the source end of the MOS tube Q24 is grounded, the drain end of the MOS tube Q23 is respectively connected with the cathode of the diode D18, the cathode of the MOS tube Q19 and the grid electrode of the MOS tube Q20, the drain end of the MOS tube Q20 is respectively connected with the high level VCC and the anode of the diode D19, the drain end of the MOS tube Q19 is connected, the source end of the MOS tube Q23 is grounded, the source end of the MOS tube Q20 is connected with the drain end of the MOS tube Q22, the grid electrode of the MOS tube Q22 is respectively connected with the source end of the MOS tube Q19, the grid electrode of the MOS tube Q21 and the drain end of the MOS tube Q21, the source end of the MOS tube Q22 is grounded, and the source end of the MOS tube Q21 is grounded;
the continuous stable charging circuit comprises ports V1 and V3, MOS transistors Q8, Q9, Q6, Q7, Q11, Q12 and Q13, triodes Q14 and Q18, diodes D11, D13, D14, D12 and D6, an inductor L4, a capacitor C8, a resistor R21, R20, ro and R19, wherein the port V1 is connected with the collector of the triode Q14, the emitter of the triode Q14 is respectively connected with one end of the inductor L4 and the cathode of the diode D6, the other end of the inductor L4 is respectively connected with the anode of the capacitor C8, one end of the resistor R19 and one end of the resistor R21, the cathode of the capacitor C8 is grounded, the other end of the resistor R19 is respectively connected with one end of the resistor R20 and the source of the MOS transistor Q9, the other end of the resistor R20 is grounded, the other end of the resistor R21 is connected with the collector of the triode Q18, the emitting port of the triode Q18 is connected with one end of the resistor Vo, the other end of the resistor R is grounded, the other end of the resistor Q18 is the triode Q3, the positive electrode of the diode D6 is grounded, the base electrode of the triode Q14 is connected with the drain end of the MOS tube Q13, the source electrode of the MOS tube Q13 is grounded, the grid electrode of the MOS tube Q13 is respectively connected with the positive electrode of the diode D12 and the grid electrode of the MOS tube Q11, the source electrode of the MOS tube Q11 is respectively connected with the negative electrode of the diode D12, the negative electrode of the diode D13 and the grid electrode of the MOS tube Q12, the drain electrode of the MOS tube Q11 is connected with the high level VCC, the positive electrode of the diode D13 is connected with the high level VCC, the drain end of the MOS tube Q12 is connected with the drain end of the MOS tube Q7, the grid electrode of the MOS tube Q7 is respectively connected with the grid electrode of the MOS tube Q6, the drain end of the MOS tube Q6 and the source electrode of the MOS tube Q8, the source electrode of the MOS tube Q7 is grounded, the source electrode of the MOS tube Q8 is respectively connected with the negative electrode of the diode D14, the drain electrode of the MOS tube Q8 and the drain end of the MOS tube Q9 are connected with the high level VCC, the positive electrode of the diode D14 is connected with the high level VCC, and the positive electrode of the diode D11 is connected with the grid electrode of the MOS tube Q9;
the voltage monitoring protection circuit comprises a port Vo, diodes D4, D15, D16 and VD1, MOS transistors Q16, Q17 and Q15, resistors R6 and R9 and a potentiometer RP, wherein the port Vo is connected with one end of the resistor of the potentiometer RP, the other end of the resistor of the potentiometer RP is grounded, a sliding blade end of the potentiometer RP is connected with the positive electrode of the diode D16, the negative electrode of the diode D16 is connected with the grid electrode of the MOS transistor Q17, the drain end of the MOS transistor Q17 is respectively connected with the negative electrode of the diode D4, the drain end of the MOS transistor Q16, the drain end of the MOS transistor Q15 and one end of the resistor R6, the other end of the resistor R6 is respectively connected with the positive electrode of the diode D15 and the negative electrode of the diode VD1, the negative electrode of the diode D15 is connected with the grid electrode of the MOS transistor Q16, the source end of the MOS transistor Q17 is grounded, the source end of the MOS transistor Q15 is grounded, the positive electrode of the diode D4 is connected with one end of the resistor R9, and the other end of the resistor is connected with the high voltage VCC level;
the voltage monitoring protection circuit comprises a MOS transistor Q15, a switch K3, a wire winding resistor S2, triodes Q1, Q2 and Q3, diodes D20 and D3, resistors R7, R8, R12, R13, R11, R10 and R25, wherein the positive electrode of the diode D3 in the voltage monitoring protection circuit is connected with the drain end of the MOS transistor Q15, the negative electrode of the diode D3 is connected with one end of the resistor R8, the other end of the resistor R8 is connected with the collector of the triode Q1, the emitter of the triode Q1 is grounded, one end of the resistor R7 is connected with the grid electrode of the MOS transistor Q15, the other end of the resistor R10 is connected with the base electrode of the triode Q1, one end of the resistor R10 is connected with a high level VCC, the other end of the resistor R10 is connected with one end of the resistor R12, one end of the resistor R13 is grounded, the other end of the resistor R12 is connected with the base electrode of the triode Q2, the collector of the wire winding resistor S2 is connected with one end of the triode Q3, the collector of the triode Q3, the interface No. 2 of the switch K3 is connected with the collector of the triode Q3, the other end of the triode Q3 is connected with the drain electrode of the triode Q3, the other end of the resistor is connected with the other end of the triode Q3 is connected with the drain electrode of the resistor Q3, the other end of the resistor Q3 is connected with the resistor Q11, the other end of the resistor is connected with the drain electrode of the resistor Q3, the other end of the resistor is connected with the resistor C3, the other end of the resistor is connected with the resistor 3, and the other end of the resistor is connected with the resistor 3 and the resistor is connected with the resistor and the resistor 3.
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