CN111404236A - Charging circuit of photovoltaic charging controller and photovoltaic charging controller - Google Patents
Charging circuit of photovoltaic charging controller and photovoltaic charging controller Download PDFInfo
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- CN111404236A CN111404236A CN202010333557.2A CN202010333557A CN111404236A CN 111404236 A CN111404236 A CN 111404236A CN 202010333557 A CN202010333557 A CN 202010333557A CN 111404236 A CN111404236 A CN 111404236A
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention relates to the technical field of photovoltaic charging, in particular to a charging circuit of a photovoltaic charging controller and the photovoltaic charging controller. The charging circuit comprises a main control module; the first voltage reduction module receives the photovoltaic electric energy, reduces the voltage and outputs charging electric energy; the second voltage reduction module is respectively connected with the main control module and the first voltage reduction module; the driving module is respectively connected with the main control module, the first voltage reduction module and the second voltage reduction module; the main control module sends a control signal to the driving module, the driving module receives the control signal and processes the control signal and then outputs a first driving signal and a second driving signal, the first driving signal drives the first voltage reduction module to work, the second driving signal drives the second voltage reduction module to work, and the second voltage reduction module reduces the working voltage of the first voltage reduction module to zero before the first voltage reduction module works. The invention can reduce the switching loss, has stable and reliable charging and high efficiency, and reduces the electromagnetic interference (EMI).
Description
Technical Field
The invention relates to the technical field of photovoltaic charging, in particular to a charging circuit of a photovoltaic charging controller and the photovoltaic charging controller.
Background
In the photovoltaic charge controller, traditional photovoltaic charge controller adopts step-down circuit to charge for the battery, and what this step-down circuit adopted all is the hard on-off control of PWM, and hard on-off major defect has: high switching loss, limited working frequency range, severe electromagnetic interference (EMI), high stress of switching devices, and the like.
At present, the photovoltaic charge controller requires input of high voltage, small volume, high efficiency, high power density and the like, the traditional hard switching technology causes large heating of a switching device due to the defects of large switching loss and the like, the temperature rises, a larger radiator is needed to meet the requirements, the stress of the switching device is high, the reliability is poor, and the existing requirements on the photovoltaic charge controller cannot be met.
Disclosure of Invention
The present invention provides a charging circuit of a photovoltaic charging controller and a photovoltaic charging controller, which solve the above-mentioned drawbacks of the prior art, and solve the problems of high switching loss, limited operating frequency range, serious electromagnetic interference (EMI), high stress and poor reliability of the hard-switching charging mode of the prior photovoltaic charging controller.
The technical scheme adopted by the invention for solving the technical problems is as follows: provided is a charging circuit of a photovoltaic charging controller, comprising:
a main control module;
the first voltage reduction module receives the photovoltaic electric energy, reduces the voltage and outputs charging electric energy;
the second voltage reduction module is respectively connected with the main control module and the first voltage reduction module; and
the driving module is respectively connected with the main control module, the first voltage reduction module and the second voltage reduction module; wherein the content of the first and second substances,
the main control module sends a control signal to the driving module, the driving module receives the control signal and outputs a first driving signal and a second driving signal after processing, the first driving signal is sent to the first voltage reduction module to drive the first voltage reduction module to work, the second driving signal is sent to the second voltage reduction module to drive the second voltage reduction module to work, and the second voltage reduction module reduces the working voltage of the first voltage reduction module to zero before the first voltage reduction module works.
Further preferred embodiments of the present invention are: the first voltage reduction module comprises a first MOS tube, the second voltage reduction module comprises a second MOS tube, a first inductor and a follow current loop unit, the grid electrode of the second MOS tube is connected to the driving module, the source electrode of the second MOS tube is connected to the connection node of the follow current loop unit and the first inductor, the drain electrode of the second MOS tube is connected to the drain electrode of the first MOS tube, and the voltage between the drain electrode and the source electrode of the first MOS tube is reduced to zero before the first MOS tube is conducted.
Further preferred embodiments of the present invention are: the driving module comprises a driving signal generating unit, a voltage clamping unit connected with the first voltage reduction module and a PWM signal generating unit arranged between the voltage clamping unit and the driving signal generating unit and connected with the main control module, the first voltage reduction module transmits a phase point voltage signal to the voltage clamping unit, the voltage clamping unit clamps the phase point voltage signal to a preset voltage signal and transmits the preset voltage signal to the PWM signal generating unit, the PWM signal generating unit processes the preset voltage signal to generate a PWM signal and transmits the PWM signal to the driving signal generating unit, and the driving signal generating unit outputs a first driving signal and a second driving signal after processing the PWM signal.
Further preferred embodiments of the present invention are: the voltage clamping unit comprises a resistor and a diode, one end of the resistor is connected to the first voltage reduction module, the other end of the resistor is connected to the anode of the diode and the input end of the PWM signal generation unit, and the cathode of the diode is connected with the power supply.
Further preferred embodiments of the present invention are: the PWM signal generating unit comprises a Schmidt phase inverter, a first AND gate unit and a second AND gate unit, wherein the input end of the Schmidt phase inverter is connected with the voltage clamping unit, the input end of the first AND gate unit is respectively connected with the output end of the Schmidt phase inverter and the main control module, the output end of the first AND gate unit is connected to the PWM signal generating unit, the input end of the second AND gate unit is respectively connected with the voltage clamping unit and the main control module, and the output end of the second AND gate unit is connected to the PWM signal generating unit.
Further preferred embodiments of the present invention are: the driving signal generating unit comprises a first processing chip and a second processing chip which are connected with the PWM signal generating unit, the first processing chip receives the PWM signal transmitted by the PWM signal generating unit and outputs a first driving signal after processing, and the second processing chip receives the PWM signal transmitted by the PWM signal generating unit and outputs a second driving signal after processing.
Further preferred embodiments of the present invention are: the first voltage reduction module further comprises an input capacitor, a second inductor, an output capacitor and a third MOS tube, wherein the anode of the input capacitor is connected to the drain electrode of the first MOS tube and the grid electrode of the second MOS tube, the cathode of the input capacitor is grounded, one end of the second inductor is connected to the source electrode of the first MOS tube and the drain electrode of the third MOS tube, the other end of the second inductor is connected to the anode of the output capacitor, the cathode of the output capacitor is grounded, the grid electrode of the first MOS tube and the grid electrode of the third MOS tube are both connected to the driving module, and the source electrode of the third MOS tube is grounded.
Further preferred embodiments of the present invention are: the charging circuit further comprises an anti-reverse charging module for preventing the photovoltaic reverse charging from the battery.
Further preferred embodiments of the present invention are: the anti-reverse-charging module comprises a fourth MOS tube, the source electrode of the fourth MOS tube is connected with an external photovoltaic, and the drain electrode of the fourth MOS tube is connected with the first voltage reduction module and the second voltage reduction module.
The technical scheme adopted by the invention for solving the technical problems is as follows: the photovoltaic charging controller comprises a photovoltaic, a battery and a charging circuit of the photovoltaic charging controller, wherein the input end of a first voltage reduction module in the charging circuit is connected with the photovoltaic to receive photovoltaic electric energy, the output end of the first voltage reduction module is connected with the battery, and the charging circuit outputs the charging electric energy to supply power for the battery.
Compared with the prior art, the invention has the beneficial effects that through the arrangement of the first voltage reduction module, the second voltage reduction module, the driving module and the main control module, the driving module processes the control signal sent by the main control module and then outputs the first driving signal and the second driving signal, transmits the first driving signal to the first voltage reduction module to drive the first voltage reduction module to work, and transmits the second driving signal to the second voltage reduction module to drive the second voltage reduction module to work, the second voltage reduction module reduces the working voltage of the first voltage reduction module to zero before the first voltage reduction module works, so that the switching loss is reduced, the circuit can realize soft switching in a wide input voltage source and output load change range, the reliable, stable and high-efficiency charging of the battery to be charged is realized, the electromagnetic interference (EMI) is reduced, and the reliability is high.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a block diagram of a charging circuit of a photovoltaic charge controller of the present invention;
FIG. 2 is a circuit schematic of the charging circuit of the photovoltaic charge controller of the present invention;
FIG. 3 is a block diagram of the drive module of the present invention;
FIG. 4 is a circuit schematic of the drive module of the present invention;
FIG. 5 is a timing diagram of signals in the driving module of the present invention;
fig. 6 is a block diagram of the structure of the photovoltaic charge controller of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a preferred embodiment of a charging circuit of a photovoltaic charge controller.
A charging circuit of a photovoltaic charging controller comprises a main control module 10, a first voltage reduction module 20, a driving module 30 and a second voltage reduction module 40 connected with the main control module 10 and the first voltage reduction module 20 respectively. The first voltage reduction module 20 receives the photovoltaic electric energy, reduces the voltage, and outputs charging electric energy to supply power to the battery 70 to be charged; the driving module 30 is respectively connected to the main control module 10, the first voltage-reducing module 20 and the second voltage-reducing module 40. The main control module 10 sends a control signal to the driving module 30, the driving module 30 receives the control signal, processes the control signal, outputs a first driving signal and a second driving signal HO _ GS soft, sends the first driving signal to the first voltage reduction module 20 to drive the first voltage reduction module to work, sends the second driving signal HO _ GS soft to the second voltage reduction module 40 to drive the second voltage reduction module 40 to work, and the second voltage reduction module 40 reduces the working voltage of the first voltage reduction module 20 to zero before the first voltage reduction module 20 works. The working voltage of the first voltage reduction module 20 is reduced to zero by arranging the second voltage reduction module 40 before the first voltage reduction module 20 works, so that the switching loss is reduced, the circuit can realize soft switching in a wide input voltage source and output load variation range, the battery 70 needing to be charged is reliably, stably and efficiently charged, the electromagnetic interference (EMI) is reduced, and the reliability is high.
Referring to fig. 2, in this embodiment, the first voltage-reducing module 20 includes a first MOS transistor Q1, the second voltage-reducing module 40 includes a second MOS transistor Q2, a first inductor L and a freewheeling circuit unit, a gate of the second MOS transistor Q2 is connected to the driving module 30, a source of the second MOS transistor Q2 is connected to a connection node between the freewheeling circuit unit and the first inductor L, a drain of the second MOS transistor Q1 is connected to a drain of the first MOS transistor Q3526, and a voltage drop between the drain and the source of the first MOS transistor Q1 is zero before the first MOS transistor Q1 is turned on.
The freewheeling circuit unit comprises a diode D1, the cathode of the diode D1 is connected to the source of the second MOS transistor Q2, and the anode is grounded, the diode D1 can be one of chips comprising two diodes, and the second buck module 40 has the working principle that when the second MOS transistor Q2 is turned on, the first inductor L1 is charged, the current rises, and when the second MOS transistor Q2 is turned off, the energy of the first inductor L1 freewheels through the diode D1, and the current drops.
Referring to fig. 3 and 4 and fig. 2, in this embodiment, the driving module 30 includes a driving signal generating unit 31, a voltage clamping unit 32 connected to the first voltage-reducing module 20, and a PWM signal generating unit 33 disposed between the voltage clamping unit 32 and the driving signal generating unit 31 and connected to the main control module 10, the first voltage-reducing module 20 transmits a phase point voltage signal VS _ buck thereof to the voltage clamping unit 32, the voltage clamping unit 32 clamps the phase point voltage signal VS _ buck to a preset voltage signal and transmits the preset voltage signal to the PWM signal generating unit 33, the PWM signal generating unit 33 processes the preset voltage signal to generate a PWM signal and transmits the PWM signal to the driving signal generating unit 31, and the driving signal generating unit 31 processes the PWM signal and outputs a first driving signal and a second driving signal HO _ GS soft. The preset voltage signal is a voltage signal lower than the phase point voltage of the first voltage-reducing module 20.
Referring to fig. 2 and 4, the voltage clamping unit 32 includes a resistor R1 and a diode D2, one end of the resistor R1 is connected to the first voltage dropping module 20, the other end of the resistor R1 is connected to the anode of the diode D2 and the input end of the PWM signal generating unit 33, and the cathode of the diode D2 is connected to the power supply. The circuit formed by the resistor R1 and the diode D2 clips and clamps the phase point voltage signal VS _ buck output by the first voltage-reducing module 20 to a preset voltage signal. The power supply connected to the cathode of diode D2 was 3.3V.
Further, referring to fig. 2 and 4, the PWM signal generating unit 33 includes a schmitt inverter U1A, a first and gate unit IC2A and a second and gate unit IC2B, an input end of the schmitt inverter U1A is connected to the voltage clamping unit 32, an input end of the first and gate unit IC2A is respectively connected to an output end of the schmitt inverter U1A and the main control module 10, an output end thereof is connected to the PWM signal generating unit 33, an input end of the second and gate unit IC2B is respectively connected to the voltage clamping unit 32 and the main control module 10, and an output end thereof is connected to the PWM signal generating unit 33. Wherein, the input end of the Schmitt inverter U1A is connected with the anode of the diode D2 in the voltage clamping unit 32.
For the standard schmitt inverter U1A, when the input voltage is above the forward threshold voltage, the output is low; when the input voltage is lower than the negative threshold voltage, the output is high; when the input voltage is between the positive and negative threshold voltages, the output is unchanged, that is, the output is inverted from the high level to the low level, or from the low level to the high level, the corresponding threshold voltages are different. The output will change only if the input voltage changes sufficiently. Schmitt inverter U1A serves as a waveform shaping circuit that can shape the analog signal waveform into a square waveform that can be processed by digital circuits. The signal output by the voltage clamping unit 32 can be reverse phase shaped using the schmitt inverter U1A.
Further, referring to fig. 2 and 4, the driving signal generating unit 31 includes a first processing chip IC3 and a second processing chip IC4 connected to the PWM signal generating unit 33, the first processing chip IC3 outputs a first driving signal after receiving the PWM signal transmitted by the PWM signal generating unit 33, and the second processing chip IC4 outputs a second driving signal HO _ GS soft after receiving the PWM signal transmitted by the PWM signal generating unit 33, wherein the first driving signal includes a first sub-driving signal HO _ GSmain and a second sub-driving signal L O _ GS main, which respectively drive different units or devices of the first buck module 20 to operate.
The signal input end of the second processing chip IC4 is connected to the first and unit IC2A, receives the PWM signal output by the first and unit IC2A, and outputs the second driving signal after processing, the first processing chip IC3 has two signal input ends, one signal input end is connected to the output end of the second and unit IC2B, receives the PWM signal output by the second and unit IC2B, and outputs the first sub-driving signal HO _ GS main of the first driving signal after processing, the other output end is connected to the main control module 10, receives the control signal of the main control module 10, and outputs the second sub-driving signal L O _ GSmain of the first driving signal after processing.
Referring to fig. 2, in this embodiment, the first voltage-reducing module 20 further includes an input capacitor C1, a second inductor L2, an output capacitor C2, and a third MOS transistor Q3, an anode of the input capacitor C1 is connected to a drain of the first MOS transistor Q1 and a gate of the second MOS transistor Q2, a cathode thereof is grounded, one end of the second inductor L2 is connected to a source of the first MOS transistor Q1 and a drain of the third MOS transistor Q3, and the other end is connected to an anode of the output capacitor C2, a cathode of the output capacitor C2 is grounded, a gate of the first MOS transistor Q1 and a gate of the third MOS transistor Q3 are both connected to the driving module 30, and a source of the third MOS transistor Q3 is grounded.
Specifically, the gate of the first MOS transistor Q1 is connected to a signal output terminal of the first processing chip IC3, receives the first sub-driving signal HO _ GS main output by the first processing chip IC3, and is driven by the first sub-driving signal HO _ GS main, and the gate of the third MOS transistor Q3 is connected to another signal output terminal of the first processing chip IC3, receives the second sub-driving signal L O _ GS main output by the first processing chip IC3, and is driven by the second sub-driving signal L O _ GS main.
In the working process of the first voltage reduction module 20, when the first MOS transistor Q1 is turned on, the third MOS transistor Q3 is turned off, the voltage signal input by the photovoltaic module 60 charges the second inductor L2 and the output capacitor C2 through the first MOS transistor Q1, the current of the second inductor L2 increases linearly, when the first MOS transistor Q1 is turned off, and when the third MOS transistor Q3 is turned on, the energy of the second inductor L2 flows through the third MOS transistor Q3, the current of the second inductor L2 decreases linearly, the duty ratio of the first MOS transistor Q1 is controlled to adjust the output charging voltage Vout, the voltage signal input by the photovoltaic module 60 is defined as the input voltage Vin, the duty ratio of the first MOS transistor Q1 is defined as D, and the charging voltage Vout, the input voltage Vin and the duty ratio D satisfy the following formula.
In this embodiment, the driving module 30 has the specific working principle that the diode D2 and the resistor R1 of the voltage clamp unit 32 clip-clamp the phase point voltage signal VS _ buck output by the first buck module 20 to the preset voltage signal VS _ buck _ a and input the signal to the schmitt inverter U1A of the PWM signal generating unit 33, the schmitt inverter U1A inverse-shapes the preset voltage signal VS _ buck _ a to the signal VS _ buck _ Y and input the signal to the input of the first and gate unit IC2 IC 9, the main control module 10 generates the control signals, which are complementary PWM signals, which are the PWMH signal and the PWM signal PWM L signal, respectively, the PWMH signal is transmitted to the input of the first and gate unit IC2 IC 56 and the input of the second and gate unit IC B, the PWMH signal and the PWM signal VS _ buck _ Y are transmitted through the first and gate unit IC2A and transmitted to the second processing chip 4, the second and gate unit IC B generates the PWM signal, the PWM signal is transmitted from the gate B to the gate B of the second and gate B, the gate B of the second and gate unit B, the second gate unit B, the gate unit B transmits the driving signal B to the gate B, the driving signal of the driving module B, the driving module B transmits the driving signal, the driving signal B, the driving signal B, the driving signal is transmitted to the driving module B, the driving module B generates the driving module B, the driving module generates the driving signal, and the driving module B, the driving signal, the driving module B, the driving circuit 36q signal, the driving module B, the driving circuit 36q signal, the driving circuit 36.
Fig. 5 shows a timing chart of signals during the operation of the driving module 30, where the signal HO _ DS _ main is a voltage waveform of the voltage signal Vds between the drain and the source of the first MOS transistor Q1. As can be seen from the operation principle of the driving module 30 and the timing diagram shown in fig. 5, before the driving signal HO _ GS _ main of the first MOS transistor Q1 is asserted, the drain-source voltage Vds of the first MOS transistor Q1 has already been lowered to zero in advance, that is, the first MOS transistor Q1 in the first buck module 20 as the main power loop implements zero-voltage turn-on, compared with the existing hard-switching scheme, the switching loss can be reduced, the circuit can implement soft-switching in a wide input voltage source and output load variation range, and the battery 70 to be charged can be charged reliably, stably and efficiently.
The second MOS transistor Q2, the first inductor L1, and the freewheeling circuit unit form a soft switching network, a voltage Vds (voltage between the drain and the gate) of the first MOS transistor Q1 in the first voltage-reducing module 20 is reduced to zero, a driving voltage Vgs (voltage between the gate and the source) starts to be effective, which is equivalent to that Vds of the first MOS transistor Q1 is equal to zero during the turn-on process of the first MOS transistor Q1, and there is no turn-on loss.
Referring to fig. 1 and 2, in the present embodiment, the charging circuit further includes an anti-reverse charging module 50 for preventing the battery 70 from reverse charging the photovoltaic 60. In the case where the voltage of the battery 70 is higher than the voltage of the photovoltaic 60, the battery 70 in turn charges the photovoltaic 60, and the reverse charging phenomenon can be avoided by providing the reverse charging prevention module 50.
Specifically, the anti-reverse charging module 50 includes a fourth MOS transistor Q4, a source of the fourth MOS transistor Q4 is connected to the external photovoltaic cell 60, and a drain thereof is connected to the first voltage-reducing module 20 and the second voltage-reducing module 40. The fourth MOS transistor Q4 prevents the battery 70 from charging the photovoltaic cells 60 in reverse.
Referring to fig. 6, the present invention also provides a preferred embodiment of a photovoltaic charge controller.
Referring to fig. 6, the present invention further provides a photovoltaic charging controller, which includes a photovoltaic 60, a battery 70, and a charging circuit of the photovoltaic charging controller, wherein an input end of the first voltage-reducing module 20 in the charging circuit is connected to the photovoltaic 60 to receive photovoltaic electric energy, an output end of the first voltage-reducing module is connected to the battery 70, and the charging circuit outputs charging electric energy to power the battery 70. Based on above-mentioned charging circuit's photovoltaic charge controller, through setting up second step-down module 40 and dropping to zero the operating voltage of first step-down module 20 before first step-down module 20 works, reduced switching loss, the circuit can realize soft switch in very wide input voltage source and output load variation range, realizes reliably stabilizing high efficiency and charges to the battery 70 that needs to charge, and reduces electromagnetic interference EMI, and the reliability is high.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (10)
1. A charging circuit for a photovoltaic charge controller, the charging circuit comprising:
a main control module;
the first voltage reduction module receives the photovoltaic electric energy, reduces the voltage and outputs charging electric energy;
the second voltage reduction module is respectively connected with the main control module and the first voltage reduction module; and
the driving module is respectively connected with the main control module, the first voltage reduction module and the second voltage reduction module; wherein the content of the first and second substances,
the main control module sends a control signal to the driving module, the driving module receives the control signal and outputs a first driving signal and a second driving signal after processing, the first driving signal is sent to the first voltage reduction module to drive the first voltage reduction module to work, the second driving signal is sent to the second voltage reduction module to drive the second voltage reduction module to work, and the second voltage reduction module reduces the working voltage of the first voltage reduction module to zero before the first voltage reduction module works.
2. The charging circuit of claim 1, wherein the first voltage-reducing module comprises a first MOS transistor, the second voltage-reducing module comprises a second MOS transistor, a first inductor and a freewheeling circuit unit, the second MOS transistor has a gate connected to the driving module, a source connected to a connection node between the freewheeling circuit unit and the first inductor, and a drain connected to the drain of the first MOS transistor, and reduces a voltage between the drain and the source to zero before the first MOS transistor is turned on.
3. The charging circuit according to claim 1 or 2, wherein the driving module comprises a driving signal generating unit, a voltage clamping unit connected to the first voltage-reducing module, and a PWM signal generating unit disposed between the voltage clamping unit and the driving signal generating unit and connected to the main control module, the first voltage-reducing module transmits a phase point voltage signal thereof to the voltage clamping unit, the voltage clamping unit clamps the phase point voltage signal to a preset voltage signal and transmits the preset voltage signal to the PWM signal generating unit, the PWM signal generating unit processes the preset voltage signal to generate a PWM signal and transmits the PWM signal to the driving signal generating unit, and the driving signal generating unit processes the PWM signal and outputs a first driving signal and a second driving signal.
4. The charging circuit of claim 3, wherein the voltage clamping unit comprises a resistor and a diode, one end of the resistor is connected to the first voltage-dropping module, the other end of the resistor is connected to the anode of the diode and the input end of the PWM signal generating unit, and the cathode of the diode is connected to the power supply.
5. The charging circuit according to claim 3, wherein the PWM signal generating unit comprises a Schmitt inverter, a first AND gate unit and a second AND gate unit, an input end of the Schmitt inverter is connected with the voltage clamping unit, an input end of the first AND gate unit is respectively connected with an output end of the Schmitt inverter and the main control module, an output end of the first AND gate unit is connected with the PWM signal generating unit, an input end of the second AND gate unit is respectively connected with the voltage clamping unit and the main control module, and an output end of the second AND gate unit is connected with the PWM signal generating unit.
6. The charging circuit according to claim 3, wherein the driving signal generating unit comprises a first processing chip and a second processing chip connected to the PWM signal generating unit, the first processing chip receives the PWM signal transmitted by the PWM signal generating unit and processes the PWM signal to output a first driving signal, and the second processing chip receives the PWM signal transmitted by the PWM signal generating unit and processes the PWM signal to output a second driving signal.
7. The charging circuit according to claim 2, wherein the first voltage-reducing module further comprises an input capacitor, a second inductor, an output capacitor and a third MOS transistor, the positive electrode of the input capacitor is connected to the drain electrode of the first MOS transistor and the gate electrode of the second MOS transistor, the negative electrode of the input capacitor is grounded, one end of the second inductor is connected to the source electrode of the first MOS transistor and the drain electrode of the third MOS transistor, the other end of the second inductor is connected to the positive electrode of the output capacitor, the negative electrode of the output capacitor is grounded, the gate electrode of the first MOS transistor and the gate electrode of the third MOS transistor are both connected to the driving module, and the source electrode of the third MOS transistor is grounded.
8. The charging circuit of claim 1, further comprising an anti-reverse charging module for preventing a battery from reverse charging a photovoltaic.
9. The charging circuit according to claim 1, wherein the anti-reverse charging module comprises a fourth MOS transistor, a source of the fourth MOS transistor is connected with an external photovoltaic, and a drain of the fourth MOS transistor is connected with the first voltage reduction module and the second voltage reduction module.
10. A photovoltaic charge controller, comprising a photovoltaic, a battery and a charging circuit of the photovoltaic charge controller according to any one of claims 1 to 9, wherein the input terminal of the first voltage-reducing module in the charging circuit is connected to the photovoltaic for receiving photovoltaic power, the output terminal thereof is connected to the battery, and the charging circuit outputs charging power for supplying power to the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010333557.2A CN111404236B (en) | 2020-04-24 | 2020-04-24 | Charging circuit of photovoltaic charging controller and photovoltaic charging controller |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934550A (en) * | 2020-07-29 | 2020-11-13 | 深圳硕日新能源科技有限公司 | Anti-backflow circuit, control method thereof and photovoltaic charging controller |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5262930A (en) * | 1992-06-12 | 1993-11-16 | The Center For Innovative Technology | Zero-voltage transition PWM converters |
| JP2010525786A (en) * | 2007-04-25 | 2010-07-22 | アドバンスト・アナロジック・テクノロジーズ・インコーポレイテッド | Step-down switching regulator with freewheeling diode |
| CN202888907U (en) * | 2012-11-08 | 2013-04-17 | 德信泰和（北京）科技股份有限公司 | Photovoltaic charge and discharge controller |
| CN203456934U (en) * | 2013-09-03 | 2014-02-26 | 深圳市金威源科技股份有限公司 | Solar photovoltaic system control apparatus |
| CN103997295A (en) * | 2014-05-27 | 2014-08-20 | 安徽循环经济技术工程院 | Solar photovoltaic charge control device |
| CN203827175U (en) * | 2014-03-14 | 2014-09-10 | 江苏汇洁能电力科技有限公司 | Novel soft switching bi-directional DC-DC converter |
| CN104242643A (en) * | 2014-09-26 | 2014-12-24 | 华南理工大学 | Driving method and driving system of synchronous-rectification BUCK converter |
| CN104883120A (en) * | 2015-01-12 | 2015-09-02 | 深圳硕日新能源科技有限公司 | MPPT photovoltaic charging control circuit capable of bidirectional charging |
| CN106849317A (en) * | 2016-12-28 | 2017-06-13 | 深圳市拓革科技有限公司 | Solar charging circuit and its charging method |
| US20170237332A1 (en) * | 2016-02-17 | 2017-08-17 | Denso Corporation | Power Converter with Zero-Voltage Switching Control |
| CN206559119U (en) * | 2017-02-14 | 2017-10-13 | 阳光电源股份有限公司 | A kind of battery MPPT charging circuits of photovoltaic off-grid system |
| CN108923659A (en) * | 2018-07-18 | 2018-11-30 | 珠海格力电器股份有限公司 | DC-DC converter and its control method and control circuit, storage medium |
| US20180358902A1 (en) * | 2017-06-12 | 2018-12-13 | Power Integrations, Inc. | Peak switching and optimal sr drive timing control |
| CN109038784A (en) * | 2018-08-01 | 2018-12-18 | 深圳硕日新能源科技有限公司 | A kind of Low-power-consumptiodormancy dormancy device, the system and method for solar controller |
| CN110504835A (en) * | 2019-08-26 | 2019-11-26 | 广州金升阳科技有限公司 | A kind of switch converters and its control method |
| CN209748252U (en) * | 2019-06-26 | 2019-12-06 | 深圳市涌泉储能科技有限公司 | photovoltaic controller |
| CN110829846A (en) * | 2019-10-12 | 2020-02-21 | 陕西亚成微电子股份有限公司 | Zero-voltage switch control circuit and method applied to switching power supply |
-
2020
- 2020-04-24 CN CN202010333557.2A patent/CN111404236B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5262930A (en) * | 1992-06-12 | 1993-11-16 | The Center For Innovative Technology | Zero-voltage transition PWM converters |
| JP2010525786A (en) * | 2007-04-25 | 2010-07-22 | アドバンスト・アナロジック・テクノロジーズ・インコーポレイテッド | Step-down switching regulator with freewheeling diode |
| CN202888907U (en) * | 2012-11-08 | 2013-04-17 | 德信泰和（北京）科技股份有限公司 | Photovoltaic charge and discharge controller |
| CN203456934U (en) * | 2013-09-03 | 2014-02-26 | 深圳市金威源科技股份有限公司 | Solar photovoltaic system control apparatus |
| CN203827175U (en) * | 2014-03-14 | 2014-09-10 | 江苏汇洁能电力科技有限公司 | Novel soft switching bi-directional DC-DC converter |
| CN103997295A (en) * | 2014-05-27 | 2014-08-20 | 安徽循环经济技术工程院 | Solar photovoltaic charge control device |
| CN104242643A (en) * | 2014-09-26 | 2014-12-24 | 华南理工大学 | Driving method and driving system of synchronous-rectification BUCK converter |
| CN104883120A (en) * | 2015-01-12 | 2015-09-02 | 深圳硕日新能源科技有限公司 | MPPT photovoltaic charging control circuit capable of bidirectional charging |
| US20170237332A1 (en) * | 2016-02-17 | 2017-08-17 | Denso Corporation | Power Converter with Zero-Voltage Switching Control |
| CN106849317A (en) * | 2016-12-28 | 2017-06-13 | 深圳市拓革科技有限公司 | Solar charging circuit and its charging method |
| CN206559119U (en) * | 2017-02-14 | 2017-10-13 | 阳光电源股份有限公司 | A kind of battery MPPT charging circuits of photovoltaic off-grid system |
| US20180358902A1 (en) * | 2017-06-12 | 2018-12-13 | Power Integrations, Inc. | Peak switching and optimal sr drive timing control |
| CN108923659A (en) * | 2018-07-18 | 2018-11-30 | 珠海格力电器股份有限公司 | DC-DC converter and its control method and control circuit, storage medium |
| CN109038784A (en) * | 2018-08-01 | 2018-12-18 | 深圳硕日新能源科技有限公司 | A kind of Low-power-consumptiodormancy dormancy device, the system and method for solar controller |
| CN209748252U (en) * | 2019-06-26 | 2019-12-06 | 深圳市涌泉储能科技有限公司 | photovoltaic controller |
| CN110504835A (en) * | 2019-08-26 | 2019-11-26 | 广州金升阳科技有限公司 | A kind of switch converters and its control method |
| CN110829846A (en) * | 2019-10-12 | 2020-02-21 | 陕西亚成微电子股份有限公司 | Zero-voltage switch control circuit and method applied to switching power supply |
Non-Patent Citations (3)
| Title |
|---|
| M. YAQOOB 等: "A Switched-Inductor-Augmented Resonant DAB Converter for Achieving Wide-Range Zero Voltage Switching", 《2016 IEEE 7TH INTERNATIONAL SYMPOSIUM ON POWER ELECTRONICS FOR DISTRIBUTED GENERATION SYSTEMS》 * |
| WOONGKUL LEE 等: "Minimizing Switching Losses in High Switching Frequency GaN-based Synchronous Buck Converter with Zero-Voltage Resonant-Transition Switching", 《2015 9TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND ECCE ASIA》 * |
| 陈刚 等: "一种软开关低通态损耗的双向DC/DC变换器", 《电力电子技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934550A (en) * | 2020-07-29 | 2020-11-13 | 深圳硕日新能源科技有限公司 | Anti-backflow circuit, control method thereof and photovoltaic charging controller |
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