CN213279254U - Input adaptive power regulation charger circuit - Google Patents

Input adaptive power regulation charger circuit Download PDF

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Publication number
CN213279254U
CN213279254U CN202022149339.1U CN202022149339U CN213279254U CN 213279254 U CN213279254 U CN 213279254U CN 202022149339 U CN202022149339 U CN 202022149339U CN 213279254 U CN213279254 U CN 213279254U
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circuit
output
resistor
input
voltage
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CN202022149339.1U
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章磊
孙晨晨
潘卫星
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DEFA TECHNOLOGY (WUXI) CO LTD
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DEFA TECHNOLOGY (WUXI) CO LTD
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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Abstract

The utility model provides an input self-adaptation power adjustment charger circuit, include: the device comprises an input connector, a rectifying circuit, an input voltage isolation monitoring circuit, a power factor correction circuit, an isolation direct current converter, a direct current converter control circuit, an isolation optocoupler U3, a microcontroller, a sampling feedback circuit, an output filter, a reverse connection protection circuit, an output connector, a current sampling circuit and a voltage sampling circuit; one end of the input connector is used for connecting with input alternating current, the other end of the input connector is connected with the input end of the rectifying circuit, and the output end of the rectifying circuit is connected with one end of the power factor correcting circuit and the input end of the input voltage isolation monitoring circuit; the output end of the input voltage isolation monitoring circuit is connected with the microcontroller; the utility model discloses can realize the automatically regulated of power according to input voltage for the charger is safe and reliable more.

Description

Input adaptive power regulation charger circuit
Technical Field
The utility model relates to a charger circuit, especially an input self-adaptation power adjustment charger circuit.
Background
The vehicle charger is a device for charging a vehicle battery; the vehicle charger may be vehicle-mounted or portable, and the portable charger may be used in a car exhibition hall or at home.
The power of the existing vehicle charger in the voltage range of the global input 100Vac to 240Vac can not be automatically adjusted, and the vehicle charger can not automatically protect when the input voltage is too high or too low. When the vehicle charger works at a high power and the input voltage is low, the vehicle charger can generate heat seriously and even generate loss and fire danger after a long time.
Disclosure of Invention
To the not enough of existence among the prior art, the utility model provides an input self-adaptation power adjustment charger circuit can realize the automatically regulated of power according to input voltage for the charger is safe and reliable more. The utility model adopts the technical proposal that:
an input adaptive power regulating charger circuit comprising: the device comprises an input connector, a rectifying circuit, an input voltage isolation monitoring circuit, a power factor correction circuit, an isolation direct current converter, a direct current converter control circuit, an isolation optocoupler U3, a microcontroller, a sampling feedback circuit, an output filter, a reverse connection protection circuit, an output connector, a current sampling circuit and a voltage sampling circuit;
one end of the input connector is used for connecting with input alternating current, the other end of the input connector is connected with the input end of the rectifying circuit, and the output end of the rectifying circuit is connected with one end of the power factor correcting circuit and the input end of the input voltage isolation monitoring circuit; the output end of the input voltage isolation monitoring circuit is connected with the microcontroller;
the other end of the power factor correction circuit is connected with one end of the isolation direct current converter, the other end of the isolation direct current converter is connected with one end of the output filter, the other end of the output filter is connected with one end of the reverse connection protection circuit, and the other end of the reverse connection protection circuit is connected with the output connector; the output connector is used for connecting the storage battery through an output line;
the current sampling circuit samples from the output connector to obtain an output current sampling signal I _ OUT and transmits the output current sampling signal I _ OUT to the sampling feedback circuit; the voltage sampling circuit samples from the output connector to obtain an output voltage sampling signal V _ OUT and transmits the output voltage sampling signal V _ OUT to the sampling feedback circuit; the microcontroller sets a current reference I _ REF and a voltage reference V _ REF and transmits the current reference I _ REF and the voltage reference V _ REF to the sampling feedback circuit;
the sampling feedback circuit generates corresponding output signals based on the output current sampling signal I _ OUT and the current reference I _ REF as well as the output voltage sampling signal V _ OUT and the voltage reference V _ REF, and applies the corresponding output signals to the cathode of the input end of the isolation optocoupler U3;
the output end of the isolation optocoupler U3 is connected with a direct current converter control circuit, and the direct current converter control circuit is connected with an isolation direct current converter.
Further, the sampling feedback circuit comprises a voltage feedback branch and a current feedback branch;
the voltage feedback branch comprises resistors R1, R2, R3, R4, capacitors C1, C2, C3, a diode D1 and an operational amplifier U1;
the current feedback branch comprises resistors R5, R6, R7, R8, R9, capacitors C4, C5, C6, a diode D2 and an operational amplifier U2;
the voltage reference V _ REF output by the microcontroller is connected with one end of a resistor R1, one end of a capacitor C1 and the non-inverting input end of an operational amplifier U1; the other end of the resistor R1 and the other end of the capacitor C1 are connected with a secondary side ground; the output voltage sampling signal V _ OUT is connected with one end of a capacitor C2, one end of a capacitor C3, one end of a resistor R2 and the inverting input end of an operational amplifier U1; the other end of the capacitor C3 is connected with one end of the resistor R3, and the other ends of the capacitor C2 and the resistor R3 are connected with the output end of the U1 and the cathode of the diode D1; the other end of the resistor R2 is connected with the anode of the diode D1 and one end of the resistor R4;
the current reference I _ REF output by the microcontroller is connected with one end of a resistor R5, one end of a capacitor C4 and the non-inverting input end of an operational amplifier U2; the other end of the resistor R5 and the other end of the capacitor C4 are connected with a secondary side ground; the output current sampling signal I _ OUT is connected with one end of a capacitor C5, one end of C6, one end of a resistor R6 and the inverting input end of an operational amplifier U2 through a resistor R9; the other end of the capacitor C6 is connected with one end of the resistor R7, and the other ends of the capacitor C5 and the resistor R7 are connected with the output end of the U2 and the cathode of the diode D2; the other end of the resistor R6 is connected with the anode of the diode D2 and one end of the resistor R8;
the other end of the resistor R4 is connected with the other end of the resistor R8, and is connected with the cathode of the input end of the isolation optocoupler U3 and one end of the resistor R10.
Furthermore, the anode of the input end of the isolation optocoupler U3 and the other end of the resistor R10 are connected with a positive voltage VCC1 through a resistor R11.
The utility model has the advantages that: the utility model provides a circuit can be according to the input voltage who monitors, adjusts the settlement of output voltage and electric current in real time to through circuits such as sampling feedback circuit, realize the self-adaptive control of power, avoid appearing phenomenons such as charger overheat.
Drawings
Fig. 1 is an electrical block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a sampling feedback circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, the input adaptive power regulation charger circuit provided in this embodiment includes an input connector, a rectifier circuit, an input voltage isolation monitoring circuit, a power factor correction circuit, an isolation dc converter, a dc converter control circuit, an isolation optocoupler U3, a microcontroller, a sampling feedback circuit, an output filter, a reverse protection circuit, an output connector, a current sampling circuit, and a voltage sampling circuit;
one end of the input connector is used for connecting input alternating current, such as 220V alternating current, and the other end of the input connector is connected with the input end of the rectifying circuit; the output end of the input voltage isolation monitoring circuit is connected with the microcontroller;
the other end of the power factor correction circuit is connected with one end of the isolation direct current converter, the other end of the isolation direct current converter is connected with one end of the output filter, the other end of the output filter is connected with one end of the reverse connection protection circuit, and the other end of the reverse connection protection circuit is connected with the output connector; the output connector can be connected with a storage battery through an output line to charge the storage battery;
the current sampling circuit samples from the output connector to obtain an output current sampling signal I _ OUT and transmits the output current sampling signal I _ OUT to the sampling feedback circuit; the voltage sampling circuit samples from the output connector to obtain an output voltage sampling signal V _ OUT and transmits the output voltage sampling signal V _ OUT to the sampling feedback circuit; the microcontroller sets a current reference I _ REF and a voltage reference V _ REF and transmits the current reference I _ REF and the voltage reference V _ REF to the sampling feedback circuit;
the sampling feedback circuit generates corresponding output signals based on the output current sampling signal I _ OUT and the current reference I _ REF as well as the output voltage sampling signal V _ OUT and the voltage reference V _ REF, and applies the corresponding output signals to the cathode of the input end of the isolation optocoupler U3;
the output end of the isolation optocoupler U3 is connected with a direct current converter control circuit, and the direct current converter control circuit is connected with an isolation direct current converter; forming feedback control;
the utility model is characterized in that the sampling feedback circuit is the key of self-adaptive power adjustment, and the rest circuits can refer to the corresponding circuits in the prior art;
as shown in fig. 2, the sampling feedback circuit includes a voltage feedback branch and a current feedback branch;
the voltage feedback branch comprises resistors R1, R2, R3, R4, capacitors C1, C2, C3, a diode D1 and an operational amplifier U1;
the current feedback branch comprises resistors R5, R6, R7, R8, R9, capacitors C4, C5, C6, a diode D2 and an operational amplifier U2;
the voltage reference V _ REF output by the microcontroller is connected with one end of a resistor R1, one end of a capacitor C1 and the non-inverting input end of an operational amplifier U1; the other end of the resistor R1 and the other end of the capacitor C1 are connected with a secondary side ground; the output voltage sampling signal V _ OUT is connected with one end of a capacitor C2, one end of a capacitor C3, one end of a resistor R2 and the inverting input end of an operational amplifier U1; the other end of the capacitor C3 is connected with one end of the resistor R3, and the other ends of the capacitor C2 and the resistor R3 are connected with the output end of the U1 and the cathode of the diode D1; the other end of the resistor R2 is connected with the anode of the diode D1 and one end of the resistor R4;
the current reference I _ REF output by the microcontroller is connected with one end of a resistor R5, one end of a capacitor C4 and the non-inverting input end of an operational amplifier U2; the other end of the resistor R5 and the other end of the capacitor C4 are connected with a secondary side ground; the output current sampling signal I _ OUT is connected with one end of a capacitor C5, one end of C6, one end of a resistor R6 and the inverting input end of an operational amplifier U2 through a resistor R9; the other end of the capacitor C6 is connected with one end of the resistor R7, and the other ends of the capacitor C5 and the resistor R7 are connected with the output end of the U2 and the cathode of the diode D2; the other end of the resistor R6 is connected with the anode of the diode D2 and one end of the resistor R8;
the other end of the resistor R4 is connected with the other end of the resistor R8 and is connected with the cathode of the input end of the isolation optocoupler U3 and one end of the resistor R10; the anode of the input end of the isolation optocoupler U3 and the other end of the resistor R10 are connected with a positive voltage VCC1 through a resistor R11;
VCC1 is +12 v;
the working principle is that the microcontroller sets a corresponding current reference I _ REF and a voltage reference V _ REF according to the input voltage monitored by the input voltage isolation monitoring circuit, and when the input voltage is reduced, the current reference I _ REF and the voltage reference V _ REF are correspondingly reduced;
the sampling feedback circuit can compare the output current sampling signal I _ OUT with the current reference I _ REF, compare the output voltage sampling signal V _ OUT with the voltage reference V _ REF, generate a corresponding feedback signal, and apply the feedback signal to the cathode of the input end of the isolation optocoupler U3; for example, when the output voltage sampling signal V _ OUT is large, the potential of the cathode of the input end of the isolation optocoupler U3 decreases, the current of the input end of the isolation optocoupler U3 increases, the current of the output end of the isolation optocoupler U3 increases, and the direct-current converter control circuit can control the isolation direct-current converter to reduce the output; for example, by reducing the duty cycle of the PWM control signal so that the isolated dc converter reduces the output;
diodes D1 and D2 act as output isolation for the voltage feedback branch and the current feedback branch.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (3)

1. An input adaptive power regulation charger circuit, comprising: the device comprises an input connector, a rectifying circuit, an input voltage isolation monitoring circuit, a power factor correction circuit, an isolation direct current converter, a direct current converter control circuit, an isolation optocoupler U3, a microcontroller, a sampling feedback circuit, an output filter, a reverse connection protection circuit, an output connector, a current sampling circuit and a voltage sampling circuit;
one end of the input connector is used for connecting with input alternating current, the other end of the input connector is connected with the input end of the rectifying circuit, and the output end of the rectifying circuit is connected with one end of the power factor correcting circuit and the input end of the input voltage isolation monitoring circuit; the output end of the input voltage isolation monitoring circuit is connected with the microcontroller;
the other end of the power factor correction circuit is connected with one end of the isolation direct current converter, the other end of the isolation direct current converter is connected with one end of the output filter, the other end of the output filter is connected with one end of the reverse connection protection circuit, and the other end of the reverse connection protection circuit is connected with the output connector; the output connector is used for connecting the storage battery through an output line;
the current sampling circuit samples from the output connector to obtain an output current sampling signal I _ OUT and transmits the output current sampling signal I _ OUT to the sampling feedback circuit; the voltage sampling circuit samples from the output connector to obtain an output voltage sampling signal V _ OUT and transmits the output voltage sampling signal V _ OUT to the sampling feedback circuit; the microcontroller sets a current reference I _ REF and a voltage reference V _ REF and transmits the current reference I _ REF and the voltage reference V _ REF to the sampling feedback circuit;
the sampling feedback circuit generates corresponding output signals based on the output current sampling signal I _ OUT and the current reference I _ REF as well as the output voltage sampling signal V _ OUT and the voltage reference V _ REF, and applies the corresponding output signals to the cathode of the input end of the isolation optocoupler U3;
the output end of the isolation optocoupler U3 is connected with a direct current converter control circuit, and the direct current converter control circuit is connected with an isolation direct current converter.
2. The input adaptive power regulating charger circuit of claim 1,
the sampling feedback circuit comprises a voltage feedback branch and a current feedback branch;
the voltage feedback branch comprises resistors R1, R2, R3, R4, capacitors C1, C2, C3, a diode D1 and an operational amplifier U1;
the current feedback branch comprises resistors R5, R6, R7, R8, R9, capacitors C4, C5, C6, a diode D2 and an operational amplifier U2;
the voltage reference V _ REF output by the microcontroller is connected with one end of a resistor R1, one end of a capacitor C1 and the non-inverting input end of an operational amplifier U1; the other end of the resistor R1 and the other end of the capacitor C1 are connected with a secondary side ground; the output voltage sampling signal V _ OUT is connected with one end of a capacitor C2, one end of a capacitor C3, one end of a resistor R2 and the inverting input end of an operational amplifier U1; the other end of the capacitor C3 is connected with one end of the resistor R3, and the other ends of the capacitor C2 and the resistor R3 are connected with the output end of the U1 and the cathode of the diode D1; the other end of the resistor R2 is connected with the anode of the diode D1 and one end of the resistor R4;
the current reference I _ REF output by the microcontroller is connected with one end of a resistor R5, one end of a capacitor C4 and the non-inverting input end of an operational amplifier U2; the other end of the resistor R5 and the other end of the capacitor C4 are connected with a secondary side ground; the output current sampling signal I _ OUT is connected with one end of a capacitor C5, one end of C6, one end of a resistor R6 and the inverting input end of an operational amplifier U2 through a resistor R9; the other end of the capacitor C6 is connected with one end of the resistor R7, and the other ends of the capacitor C5 and the resistor R7 are connected with the output end of the U2 and the cathode of the diode D2; the other end of the resistor R6 is connected with the anode of the diode D2 and one end of the resistor R8;
the other end of the resistor R4 is connected with the other end of the resistor R8, and is connected with the cathode of the input end of the isolation optocoupler U3 and one end of the resistor R10.
3. The input adaptive power regulating charger circuit of claim 2,
the anode of the input end of the isolation optocoupler U3 and the other end of the resistor R10 are connected with a positive voltage VCC1 through a resistor R11.
CN202022149339.1U 2020-09-25 2020-09-25 Input adaptive power regulation charger circuit Active CN213279254U (en)

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Application Number Priority Date Filing Date Title
CN202022149339.1U CN213279254U (en) 2020-09-25 2020-09-25 Input adaptive power regulation charger circuit

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Application Number Priority Date Filing Date Title
CN202022149339.1U CN213279254U (en) 2020-09-25 2020-09-25 Input adaptive power regulation charger circuit

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CN213279254U true CN213279254U (en) 2021-05-25

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