CN108879889A - A kind of solar battery MPPT battery charge controller and its charging system - Google Patents
A kind of solar battery MPPT battery charge controller and its charging system Download PDFInfo
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- CN108879889A CN108879889A CN201810989668.1A CN201810989668A CN108879889A CN 108879889 A CN108879889 A CN 108879889A CN 201810989668 A CN201810989668 A CN 201810989668A CN 108879889 A CN108879889 A CN 108879889A
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- circuit
- switching tube
- voltage
- battery
- charge controller
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Classifications
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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
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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
- H02J7/007—Regulation of charging or discharging current or 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
- H02J7/34—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
-
- 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 discloses a kind of solar battery MPPT battery charge controller and its charging systems, including：The reduction voltage circuit being connect respectively with photovoltaic panel and rechargeable battery；For acquiring the charging voltage of rechargeable battery and the voltage and current Acquisition Circuit of electric current in real time；The control module being connect respectively with the adjustable side of voltage and current Acquisition Circuit and reduction voltage circuit, for tracking the maximum power point of rechargeable battery when adjusting the underpressure of reduction voltage circuit, to guarantee that reduction voltage circuit charges to rechargeable battery in maximum power point；The voltage conversion circuit being connect with rechargeable battery, for the voltage at rechargeable battery both ends to be carried out voltage conversion, to provide operating voltage for control panel entire in battery charge controller.As it can be seen that the battery charge controller of the application expands the scope of application of battery charge controller, and effectively increase the energy utilization rate of solar battery.
Description
Technical field
The present invention relates to new energy fields, more particularly to a kind of solar battery MPPT battery charge controller and its charging
System.
Background technique
With gradually using up for non-renewable energy resources, renewable energy is concerned.In renewable energy, solar energy is answered
With more and more extensive, the charge power supply of rechargeable battery is all made of solar battery in many equipment.In rechargeable solar battery
It is core group for controlling the rechargeable solar battery control device that solar battery charges to rechargeable battery in system
At part.Currently, the operating voltage of entire control panel is provided by rechargeable battery in rechargeable solar battery control device,
So rechargeable solar battery control device is only applicable to the equipment where the full higher rechargeable battery of piezoelectric voltage, thus full
The power demands of the entire control panel of foot, but this can make the scope of application of rechargeable solar battery control device narrow.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art needs to solve at present
The problem of.
Summary of the invention
The object of the present invention is to provide a kind of solar battery MPPT battery charge controller and its charging systems, expand and fill
The scope of application of controller for electric consumption, and effectively increase the energy utilization rate of solar battery.
In order to solve the above technical problems, the present invention provides a kind of solar battery MPPT battery charge controllers, including：
The reduction voltage circuit being connect respectively with photovoltaic panel and rechargeable battery；
For acquiring the charging voltage of the rechargeable battery and the voltage and current Acquisition Circuit of electric current in real time；
The control module connecting respectively with the adjustable side of the voltage and current Acquisition Circuit and the reduction voltage circuit is used for
When adjusting the underpressure of the reduction voltage circuit, the maximum power point of the rechargeable battery is tracked, to guarantee the decompression electricity
It charges in the maximum power point to the rechargeable battery on road；
The voltage conversion circuit being connect with the rechargeable battery, for carrying out the voltage at the rechargeable battery both ends
Voltage conversion, to provide operating voltage for control panel entire in battery charge controller.
Preferably, the reduction voltage circuit includes first capacitor, switching tube circuit, the first buffer circuit, freewheeling circuit, energy storage
Inductance and the second capacitor, wherein：
The first capacitor anode respectively with the output plus terminal of the photovoltaic panel, the switching tube circuit first end and
The first end of the buffer circuit connects, the second end of the switching tube circuit respectively with the second end of the buffer circuit, institute
State the first end of freewheeling circuit and the first end connection of the energy storage inductor, the second end of the energy storage inductor is respectively with described the
Two capacitors anode and the rechargeable battery anode connection, the cathode of the rechargeable battery respectively with second capacitor
Cathode, the second end of the freewheeling circuit, the cathode of the first capacitor, the photovoltaic panel the connection of output negative terminal, it is public
End ground connection altogether, adjustable side of the control terminal of the switching tube circuit as the reduction voltage circuit；
Then the control module includes：
The control chip being connect with the voltage and current Acquisition Circuit；
The driving circuit being connect respectively with the control terminal of the control chip and the switching tube circuit；The control chip
For driving the switching tube circuit to be connected using the driving circuit, and adjusting the same of the switching tube circuit turn-on time
When, track the maximum power point of the rechargeable battery, with guarantee the reduction voltage circuit the maximum power point to it is described can
Rechargeable battery charging.
Preferably, the switching tube circuit includes the switching tube of N number of parallel connection, and N is positive integer, wherein：
The control terminal of N number of switching tube is connected with each other, control terminal of the common end as the switching tube circuit.
Preferably, the freewheeling circuit includes M common cathode diode in parallel, and M is positive integer, wherein：
The cathode of the M common cathode diodes is connected with each other, first end of the common end as the freewheeling circuit, and M
The anode of the common cathode diode is connected with each other, second end of the common end as the freewheeling circuit.
Preferably, the freewheeling circuit is specially continued flow switch pipe, and the first end of the continued flow switch pipe is as described continuous
The first end of current circuit, second end of the second end of the continued flow switch pipe as the freewheeling circuit；
Then the control module further includes：
The push-pull circuit being connect respectively with the control terminal of the control chip and the continued flow switch pipe；The control chip
It is also used under the premise of N number of switching tube and the continued flow switch pipe alternate conduction, drives institute using the push-pull circuit
State the conducting of continued flow switch pipe；
And the reduction voltage circuit further includes second buffer circuit in parallel with the continued flow switch pipe.
Preferably, first buffer circuit and second buffer circuit include concatenated absorption resistance and absorb electric
Hold.
Preferably, solar battery MPPT battery charge controller further includes the electric current reverse flow for circuit where preventing
Dynamic counnter attack switching tube and booster driving circuit, wherein：
The first end of the counnter attack switching tube anode with the second end of the energy storage inductor and second capacitor respectively
Connection, the second end of the counnter attack switching tube are connect with the anode of the rechargeable battery, the control terminal of the counnter attack switching tube
It is connect with the booster driving circuit；
Then the control chip is also used to drive the counnter attack switching tube to be in always using the booster driving circuit
Fully conducting state.
Preferably, solar battery MPPT battery charge controller further includes Schottky diode, wherein：
The anode of the Schottky diode respectively with the first end of the counnter attack switching tube, the energy storage inductor second
The anode connection of end and second capacitor, the cathode of the Schottky diode second end with the counnter attack switching tube respectively
With the anode connection of the rechargeable battery.
Preferably, the continued flow switch pipe and the counnter attack switching tube are specially NMOS tube, the grid of the NMOS tube
As the control terminal of the continued flow switch pipe and the counnter attack switching tube, the drain electrode of the NMOS tube is as the continued flow switch pipe
With the first end of the counnter attack switching tube, the source electrode of the NMOS tube is as the continued flow switch pipe and the counnter attack switching tube
Second end；
N number of switching tube is specially PMOS tube, control of the grid of the PMOS tube as N number of switching tube
End, first end of the source electrode of the PMOS tube as N number of switching tube, the drain electrode of PMOS tube is as N number of switching tube
Second end.
In order to solve the above technical problems, the present invention also provides a kind of solar battery MPPT charging system, including photovoltaic
Plate further includes any of the above-described kind of solar battery MPPT battery charge controller.
The present invention provides a kind of solar battery MPPT battery charge controllers, including：Respectively with photovoltaic panel and chargeable
The reduction voltage circuit of battery connection；For acquiring the charging voltage of rechargeable battery and the voltage and current Acquisition Circuit of electric current in real time；
The control module being connect respectively with the adjustable side of voltage and current Acquisition Circuit and reduction voltage circuit, in the drop for adjusting reduction voltage circuit
When pressure degree, the maximum power point of rechargeable battery is tracked, to guarantee that reduction voltage circuit fills rechargeable battery in maximum power point
Electricity；The voltage conversion circuit being connect with rechargeable battery, for the voltage at rechargeable battery both ends to be carried out voltage conversion, with for
Entire control panel provides operating voltage in battery charge controller.
As it can be seen that including voltage conversion circuit in the battery charge controller of the application, even if it is lower to be applied to full piezoelectric voltage
The voltage at rechargeable battery both ends can also be carried out boost conversion by the equipment where rechargeable battery, voltage conversion circuit, thus
Voltage after making boosting is sufficient for the power demands of entire control panel in battery charge controller, and then expands charge control dress
The scope of application set.Moreover, in the battery charge controller of the application, control module combination reduction voltage circuit, voltage and current acquisition electricity
Road is realized jointly charges to rechargeable battery in maximum power point, to effectively increase the energy utilization rate of solar battery.
It is having the same with above-mentioned battery charge controller the present invention also provides a kind of solar battery MPPT charging system
Beneficial effect.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of solar battery MPPT battery charge controller provided by the invention；
Fig. 2 is a kind of structural schematic diagram of reduction voltage circuit as shown in Figure 1 provided by the invention；
Fig. 3 (a) is a kind of structural schematic diagram for controlling chip provided by the invention；
Fig. 3 (b) is a kind of structural schematic diagram of driving circuit provided by the invention；
Fig. 4 (a) is provided by the invention a kind of for acquiring the voltage collection circuit figure of the charging voltage of rechargeable battery；
Fig. 4 (b) is provided by the invention a kind of for acquiring the current collection circuit figure of the charging current of rechargeable battery；
Fig. 4 (c) is provided by the invention a kind of for acquiring the voltage collection circuit figure of the output voltage of photovoltaic panel；
Fig. 4 (d) is provided by the invention a kind of for acquiring the current collection circuit figure of the output electric current of photovoltaic panel；
Fig. 5 is a kind of structural schematic diagram of push-pull circuit provided by the invention；
Fig. 6 is a kind of structural schematic diagram of booster driving circuit provided by the invention；
Fig. 7 is a kind of structural schematic diagram of 12V voltage conversion circuit provided by the invention；
Fig. 8 is the structural schematic diagram that a kind of program provided by the invention downloads debug circuit；
Fig. 9 is a kind of structural schematic diagram of the telecommunication circuit between control chip and host computer provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of solar battery MPPT battery charge controller and its charging system, expands and fills
The scope of application of controller for electric consumption, and effectively increase the energy utilization rate of solar battery.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural representation of solar battery MPPT battery charge controller provided by the invention
Figure.
Solar battery MPPT battery charge controller includes：
The reduction voltage circuit 1 being connect respectively with photovoltaic panel and rechargeable battery；
For acquiring the charging voltage of rechargeable battery and the voltage and current Acquisition Circuit 2 of electric current in real time；
The control module 3 being connect respectively with the adjustable side of voltage and current Acquisition Circuit 2 and reduction voltage circuit 1, for adjusting
When the underpressure of reduction voltage circuit 1, the maximum power point of rechargeable battery is tracked, to guarantee reduction voltage circuit 1 in maximum power point
It charges to rechargeable battery；
The voltage conversion circuit 4 connecting with rechargeable battery turns for the voltage at rechargeable battery both ends to be carried out voltage
It changes, to provide operating voltage for control panel entire in battery charge controller.
Specifically, battery charge controller provided by the present application includes reduction voltage circuit 1, voltage and current Acquisition Circuit 2, control mould
Block 3 and voltage conversion circuit 4, its working principle is that：Charging electricity when being charged by acquiring photovoltaic panel in real time to rechargeable battery
Pressure and charging current realize that closed-loop control photovoltaic panel charges to rechargeable battery with maximum power output, i.e. realization MPPT
(Maximum Power Point Tracking, MPPT maximum power point tracking) control.
More specifically, connecting reduction voltage circuit 1 between photovoltaic panel and rechargeable battery, reduction voltage circuit 1 is adjusted in control module 3
Underpressure, with adjust photovoltaic panel to rechargeable battery charge when charging voltage and charging current.It is known according to chargeable
The charging voltage and charging current of battery can seek the power of rechargeable battery, when the power of rechargeable battery reaches maximum power
Point, i.e. realization photovoltaic panel charge to rechargeable battery with maximum power output.
Based on this, the charging voltage of acquisition rechargeable battery and charging are electric in real time by voltage and current Acquisition Circuit 2 by the application
Stream, and send it to control module 3.The charging voltage and charging electricity that control module 3 is acquired according to voltage and current Acquisition Circuit 2
Stream seeks the power of rechargeable battery, if the initial decompression degree based on reduction voltage circuit 1, the power for the rechargeable battery sought are
PA；The power for the rechargeable battery sought again when reducing the underpressure of reduction voltage circuit 1 is PB；If PB > PA, continues
Reduce the underpressure of reduction voltage circuit 1 until the power of this rechargeable battery sought is less than the last chargeable electricity sought
The power in pond.At this point, the underpressure of reduction voltage circuit 1 is adjusted to last corresponding underpressure by control module 3, that is, track
The power of rechargeable battery reaches maximum power point, to effectively increase the energy utilization rate of solar battery.
In addition, the application is considered when the full piezoelectric voltage of rechargeable battery is lower, it is unable to satisfy battery charge controller
In entire control panel power demands, so, include voltage conversion circuit 4 in the battery charge controller of the application, can fill
The voltage at battery both ends carries out voltage conversion, to meet the power demands of entire control panel in battery charge controller.Specifically
Ground, when equipment where the battery charge controller of the application is applied to the full lower rechargeable battery of piezoelectric voltage, charge control
The voltage at rechargeable battery both ends can be carried out boost conversion by voltage conversion circuit 4 contained by device, for battery charge controller
In entire control panel operating voltage is provided, to expand the scope of application of battery charge controller.
The present invention provides a kind of solar battery MPPT battery charge controllers, including：Respectively with photovoltaic panel and chargeable
The reduction voltage circuit of battery connection；For acquiring the charging voltage of rechargeable battery and the voltage and current Acquisition Circuit of electric current in real time；
The control module being connect respectively with the adjustable side of voltage and current Acquisition Circuit and reduction voltage circuit, in the drop for adjusting reduction voltage circuit
When pressure degree, the maximum power point of rechargeable battery is tracked, to guarantee that reduction voltage circuit fills rechargeable battery in maximum power point
Electricity；The voltage conversion circuit being connect with rechargeable battery, for the voltage at rechargeable battery both ends to be carried out voltage conversion, with for
Entire control panel provides operating voltage in battery charge controller.
As it can be seen that including voltage conversion circuit in the battery charge controller of the application, even if it is lower to be applied to full piezoelectric voltage
The voltage at rechargeable battery both ends can also be carried out boost conversion by the equipment where rechargeable battery, voltage conversion circuit, thus
Voltage after making boosting is sufficient for the power demands of entire control panel in battery charge controller, and then expands charge control dress
The scope of application set.Moreover, in the battery charge controller of the application, control module combination reduction voltage circuit, voltage and current acquisition electricity
Road is realized jointly charges to rechargeable battery in maximum power point, to effectively increase the energy utilization rate of solar battery.
On the basis of the above embodiments：
Referring to figure 2., Fig. 2 is a kind of structural schematic diagram of reduction voltage circuit as shown in Figure 1 provided by the invention.
As a kind of preferred embodiment, reduction voltage circuit 1 includes first capacitor C1, switching tube circuit QC, the first buffering electricity
Road SC1, freewheeling circuit, energy storage inductor L and the second capacitor C2, wherein：
The positive first end and buffer circuit with the output plus terminal of photovoltaic panel, switching tube circuit QC respectively of first capacitor C1
First end connection, the second end of switching tube circuit QC respectively with the second end of buffer circuit, the first end of freewheeling circuit and storage
Can inductance L first end connection, the second end of energy storage inductor L respectively with the anode of the second capacitor C2 and the anode of rechargeable battery
Connection, the cathode of rechargeable battery respectively with the cathode of the second capacitor C2, the second end of freewheeling circuit, first capacitor C1 it is negative
The output negative terminal connection of pole, photovoltaic panel, common end grounding, adjusting of the control terminal of switching tube circuit QC as reduction voltage circuit 1
End；
Then control module 3 includes：
The control chip being connect with voltage and current Acquisition Circuit 2；
The driving circuit being connect respectively with the control terminal of control chip and switching tube circuit QC；Chip is controlled to be used to utilize drive
Dynamic circuit drives switching tube circuit QC conducting, and while regulating switch pipe circuit QC turn-on time, track rechargeable battery
Maximum power point, with guarantee reduction voltage circuit 1 maximum power point to rechargeable battery charge.
Specifically, the reduction voltage circuit 1 of the application include first capacitor C1, switching tube circuit QC, the first buffer circuit SC1,
Freewheeling circuit, energy storage inductor L and the second capacitor C2, its working principle is that：Since the voltage at capacitor both ends cannot be mutated, so this
Apply that first capacitor C1 is added in the output end of photovoltaic panel, for stablizing the output voltage of photovoltaic panel.Here first capacitor C1
It can be made of the sub- capacitor of multiple parallel connections.In addition, the control module 3 of the application passes through the make-and-break time of control switch pipe circuit QC
To change the underpressure of reduction voltage circuit 1.
In detail, the decompression principle of reduction voltage circuit 1 is specially：When the wink of 3 control switch pipe circuit QC of control module conducting
Between the input voltage of reduction voltage circuit 1 can increase at once, energy storage inductor L and rechargeable battery are connected with photovoltaic panel at this time, due to storage
Can inductance L play inhibitions, Qi Dinghui gets a part of voltage, so that voltage (the i.e. reduction voltage circuit 1 at rechargeable battery both ends
Output voltage) it is less than input voltage.When 3 control switch pipe circuit QC of control module shutdown, photovoltaic panel and subsequent conditioning circuit are disconnected,
Energy storage inductor L discharges the energy itself stored to rechargeable battery as power supply at this time, the electricity at the both ends energy storage inductor L here
Pressure is less than the input voltage of reduction voltage circuit 1 surely.
As it can be seen that no matter which kind of state switching tube circuit QC is on and turns off, the output voltage of reduction voltage circuit 1 is both less than
Its input voltage, to play antihypertensive effect.As for the underpressure of reduction voltage circuit 1, when the on-off of regulating switch pipe circuit QC
Between it is i.e. changeable.
In addition, the control module 3 of the application includes control chip and driving circuit, wherein control chip plays main control
Effect is led since the control signal for control switch pipe circuit QC of control chip output is not enough to driving switch pipe circuit QC
Logical, so driving circuit is added in the application on the basis of controlling chip, driving circuit is actually to amplify control chip output
Control signal circuit, thus make amplified control signal be enough driving switch pipe circuit QC be connected.Referring to figure 3. (a)
And Fig. 3 (b), Fig. 3 (a) are a kind of structural schematic diagram for controlling chip provided by the invention；Fig. 3 (b) is provided by the invention one
The structural schematic diagram of kind driving circuit.
It can be seen that in the control terminal series resistance of switching tube circuit QC, this is allowed for out the application by Fig. 3 (b) and Fig. 2
Closing pipe circuit QC has capacity effect, and RC constant is adjusted in control terminal series resistance, is prolonged with adjusting opening for switching tube circuit QC
When；And in resistor in parallel fast recovery diode, the charge of its control terminal to be discharged in time when turning off the switch pipe circuit QC
Fall, makes its normal switching-off.
STM32 series based on Fig. 3 (a) controls chip, and (a) and Fig. 4 (b), Fig. 4 (a) provide referring to figure 4. for the present invention
It is a kind of for acquiring the voltage collection circuit figure of the charging voltage of rechargeable battery, Fig. 4 (b) is a kind of use provided by the invention
In the current collection circuit figure of the charging current of acquisition rechargeable battery.
In Fig. 4 (a), voltage collection circuit is using operational amplifier (selection is LM258) to collected charging voltage
Size be adjusted, with adjust to STM32 series control chip voltage acquisition range.Wherein, the diminution of operational amplifier
Multiple is determined by its input resistance Rin and feedback resistance Rf, as specific minification, according to the actual situation depending on.Fig. 4
(b) in, current collection circuit acquires charging current (that utilize is battery current sampling resistor Rba in Fig. 2) in the form of voltage,
Current collection circuit is similar with voltage collection circuit principle, equally using operational amplifier (selection is OP07) to collected
The corresponding voltage swing of charging current is adjusted, to adjust to the voltage acquisition range of STM32 series control chip.
Further, the application can also acquire the output voltage and output electric current of photovoltaic panel.(c) and Fig. 4 referring to figure 4.
(d), Fig. 4 (c) is provided by the invention a kind of for acquiring the voltage collection circuit figure of the output voltage of photovoltaic panel, and Fig. 4 (d) is
It is provided by the invention a kind of for acquiring the current collection circuit figure of the output electric current of photovoltaic panel.Here the output electricity of photovoltaic panel
Current voltage Acquisition Circuit is identical as the charging voltage and current Acquisition Circuit principle of above-mentioned rechargeable battery, and the application is no longer superfluous herein
It states.
As a kind of preferred embodiment, switching tube circuit QC includes the switching tube of N number of parallel connection, and N is positive integer, wherein：
The control terminal of N number of switching tube is connected with each other, control terminal of the common end as switching tube circuit QC.
Further, the switching tube circuit QC of the application includes the switching tube of multiple parallel connections, and the control terminal of each switching tube is equal
It is connect with driving circuit, inputs identical driving signal with synchronous.Why switching tube circuit QC selects the switch of multiple parallel connections
Pipe, is that switching tube circuit QC can be prevented to be burned since shunting function is played in multiple switch pipe parallel connection.
As a kind of preferred embodiment, freewheeling circuit includes that M in parallel common cathode diode D, M are positive integer, wherein：
The cathode of M common cathode diode D is connected with each other, first end of the common end as freewheeling circuit, M two pole of common cathode
The anode of pipe D is connected with each other, second end of the common end as freewheeling circuit.
Specifically, the freewheeling circuit of the application may include the common cathode diode D of multiple parallel connections.When the control of control module 3 is opened
When closing pipe circuit QC shutdown, energy storage inductor L can be released the energy that itself is stored to rechargeable battery by multiple common cathode diode D
It puts, plays afterflow.
As a kind of preferred embodiment, freewheeling circuit is specially continued flow switch pipe Q, and the first end of continued flow switch pipe Q is made
For the first end of freewheeling circuit, second end of the second end of continued flow switch pipe Q as freewheeling circuit；
Then control module 3 further includes：
The push-pull circuit being connect respectively with the control terminal of control chip and continued flow switch pipe Q；Control chip is also used to N number of
Under the premise of switching tube and continued flow switch pipe Q alternate conduction, be connected using push-pull circuit driving continued flow switch pipe Q；
And reduction voltage circuit 1 further includes the second buffer circuit SC2 in parallel with continued flow switch pipe Q.
Specifically, other than above-mentioned common cathode diode D is as the freewheeling circuit of the application, the application can also select continuous
Switching tube Q is flowed as freewheeling circuit.Compared to multiple common cathode diode D, the calorific value of continued flow switch pipe Q is less.But the application
Freewheeling circuit regardless of use which kind of afterflow mode, be considered as its size of current that can bear, to meet circuit requirement.
In addition, it should be noted that, switching tube is burned in order to prevent, multiple switch pipe and afterflow in switching tube circuit QC
Switching tube Q answers alternate conduction, i.e., when the switching tube in switching tube circuit QC is in the conductive state, continued flow switch pipe Q centainly locates
In off state；When the switching tube in switching tube circuit QC is in an off state, continued flow switch pipe Q is centainly on shape
State；And shutdown (or conducting) time of conducting (or shutdown) time of the switching tube in switching tube circuit QC and continued flow switch pipe Q
Want fully synchronized and equal.But there are dead times for the on, off both in actual test, if fully according to theoretical reason
Think the synchronous the two of situation, then will appear the case where simultaneously turning on, switching tube is caused to be burned.Therefore, should estimate in actual test
Dead time is calculated, to guarantee that continued flow switch pipe Q is connected again after the switching tube in switching tube circuit QC complete switches off and afterflow is opened
The switching tube be connected again in switching tube circuit QC after pipe Q is complete switched off is closed, to improve the safety of circuit.
Similarly, for continued flow switch pipe Q, the control module 3 of the application further includes driving under the control of control chip
The push-pull circuit of continued flow switch pipe Q conducting, and the reduction voltage circuit 1 of the application further includes the second buffering for protecting continued flow switch pipe Q
Circuit SC2.Referring to figure 5., Fig. 5 is a kind of structural schematic diagram of push-pull circuit provided by the invention.
As a kind of preferred embodiment, the first buffer circuit SC1 and the second buffer circuit SC2 include concatenated absorption
Resistance and Absorption Capacitance.
Further, the first buffer circuit SC1 in the application and the second buffer circuit SC2 includes concatenated absorption electricity
Resistance and Absorption Capacitance, the two buffer circuits are the safeguard measures taken for the poor switching tube of overcurrent-overvoltage ability,
The peak voltage of circuit where it is absorbable, to protect switching tube in parallel therewith.
As a kind of preferred embodiment, solar battery MPPT battery charge controller further includes for electricity where preventing
The counnter attack switching tube and booster driving circuit of the reverse direction current flow on road, wherein：
The first end of counnter attack switching tube is connect with the anode of the second end of energy storage inductor L and the second capacitor C2 respectively, counnter attack
The second end of switching tube and the anode of rechargeable battery connect, and the control terminal of counnter attack switching tube is connect with booster driving circuit；
Chip is then controlled to be also used to drive counnter attack switching tube to be in fully on state always using booster driving circuit.
Specifically, it is contemplated that photovoltaic panel is possible to be blocked, its output voltage is caused to be less than rechargeable battery at this time
Voltage, reverse direction current flow, the battery charge controller of the application further include counnter attack switching tube and booster driving circuit in order to prevent.
Since counnter attack switching tube only allows electric current to flow into second end from first end, so being blocked in photovoltaic panel, output voltage is less than
In the case where the voltage of rechargeable battery at this time, reverse direction current flow can be prevented.In addition, no matter which kind of shape is photovoltaic panel be in
State, control chip utilizes booster driving circuit that counnter attack switching tube is driven to be in fully on state always, to guarantee in photovoltaic
Electric current passes through when plate is normally rechargeable battery charging.
Fig. 6 is please referred to, Fig. 6 is a kind of structural schematic diagram of booster driving circuit provided by the invention.In Fig. 6, the port Q2G
The signal of output is the signal for driving counnter attack switching tube, to drive counnter attack switching tube to be constantly in fully on state.Equally
Ground, with reference to Fig. 2, in the control terminal series resistance of counnter attack switching tube, and in resistor in parallel fast recovery diode.
As a kind of preferred embodiment, solar battery MPPT battery charge controller further includes Schottky diode,
Wherein：
The anode of Schottky diode is electric with the first end of counnter attack switching tube, the second end of energy storage inductor L and second respectively
Hold the anode connection of C2, anode of the cathode of Schottky diode respectively with the second end of counnter attack switching tube and rechargeable battery connects
It connects.
Further, the battery charge controller of the application further includes Schottky diode, and Schottky diode is opened with counnter attack
Pipe parallel connection is closed, the electric current of counnter attack switching tube inflow can be reduced；Moreover, Schottky diode can prevent the electricity at counnter attack switching tube both ends
Pressure mutation, to play the role of protecting counnter attack switching tube.
As a kind of preferred embodiment, continued flow switch pipe Q and counnter attack switching tube are specially NMOS tube, the grid of NMOS tube
Control terminal of the pole as continued flow switch pipe Q and counnter attack switching tube, the drain electrode of NMOS tube is as continued flow switch pipe Q and counnter attack switching tube
First end, second end of the source electrode of NMOS tube as continued flow switch pipe Q and counnter attack switching tube；
N number of switching tube is specially PMOS tube, control terminal of the grid of PMOS tube as N number of switching tube, the source of PMOS tube
First end of the pole as N number of switching tube, second end of the drain electrode of PMOS tube as N number of switching tube.
Specifically, the continued flow switch pipe Q and counnter attack switching tube of the application can be selected but be not limited only to NMOS tube, switching tube electricity
Multiple switch pipe in the QC of road can be selected but be not limited only to PMOS tube, and the application is not particularly limited herein.
In addition, had based on operating voltage needed for control panel entire in battery charge controller known to above-mentioned physical circuit figure+
12V ,+5V ,+3.3V and -5V.If the full piezoelectric voltage of the rechargeable battery of the application is less than 12V, Fig. 7 is please referred to, Fig. 7 is this
A kind of structural schematic diagram of the 12V voltage conversion circuit provided is provided.After acquisition+12V voltage, the conversion of remaining voltage only needs
One voltage conversion chip can (+12V turns+5V, and+12V turns+3.3V, and+5V turns -5V).
Other than foregoing circuit, the application please refers to Fig. 8 and Fig. 9 there are also some basic circuits for control chip operation,
Fig. 8 is the structural schematic diagram that a kind of program provided by the invention downloads debug circuit, and Fig. 9 is a kind of control core provided by the invention
The structural schematic diagram of telecommunication circuit between piece and host computer.In Fig. 8, program download debug circuit respectively with Program download
(such as J-Link, ST-Link) is connected with control chip, is mainly used for controlling the downloading of chip program and on-line monitoring debugging.
In Fig. 9, the combination of CH340G and USB are mainly used for realizing the communication between control chip and host computer, to make host computer pair
Communication data is acquired, handles, shows and analyzes.For example, showing charging current waveform, charging voltage wave using host computer
The drive waveforms of shape, photovoltaic panel output voltage waveforms, photovoltaic panel output current wave and each switching tube, and by the waveform number of display
According to being stored in inside data document, calls and analyze for tester.
The present invention also provides a kind of solar battery MPPT charging systems, including photovoltaic panel, further include any of the above-described kind
Solar battery MPPT battery charge controller.
The introduction of charging system provided by the present application please refers to the embodiment of above-mentioned battery charge controller, and the application is herein not
It repeats again.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of solar battery MPPT battery charge controller, which is characterized in that including：
The reduction voltage circuit being connect respectively with photovoltaic panel and rechargeable battery；
For acquiring the charging voltage of the rechargeable battery and the voltage and current Acquisition Circuit of electric current in real time；
The control module being connect respectively with the adjustable side of the voltage and current Acquisition Circuit and the reduction voltage circuit, for adjusting
When the underpressure of the reduction voltage circuit, the maximum power point of the rechargeable battery is tracked, to guarantee that the reduction voltage circuit exists
The maximum power point charges to the rechargeable battery；
The voltage conversion circuit being connect with the rechargeable battery, for the voltage at the rechargeable battery both ends to be carried out voltage
Conversion, to provide operating voltage for control panel entire in battery charge controller.
2. solar battery MPPT battery charge controller as described in claim 1, which is characterized in that the reduction voltage circuit includes
First capacitor, switching tube circuit, the first buffer circuit, freewheeling circuit, energy storage inductor and the second capacitor, wherein：
The anode of the first capacitor respectively with the output plus terminal of the photovoltaic panel, the first end of the switching tube circuit and described
The first end of buffer circuit connects, the second end of the switching tube circuit respectively with the second end of the buffer circuit, described continuous
The first end of current circuit and the connection of the first end of the energy storage inductor, the second end of the energy storage inductor are electric with described second respectively
The anode connection of the anode and the rechargeable battery of appearance, the cathode of the rechargeable battery are negative with second capacitor respectively
The output negative terminal connection of pole, the second end of the freewheeling circuit, the cathode of the first capacitor, the photovoltaic panel, common end
Ground connection, adjustable side of the control terminal of the switching tube circuit as the reduction voltage circuit；
Then the control module includes：
The control chip being connect with the voltage and current Acquisition Circuit；
The driving circuit being connect respectively with the control terminal of the control chip and the switching tube circuit；The control chip is used for
The switching tube circuit is driven to be connected using the driving circuit, and while adjusting the switching tube circuit turn-on time,
The maximum power point of the rechargeable battery is tracked, to guarantee the reduction voltage circuit in the maximum power point to described chargeable
Battery charging.
3. solar battery MPPT battery charge controller as claimed in claim 2, which is characterized in that the switching tube circuit packet
The switching tube of N number of parallel connection is included, N is positive integer, wherein：
The control terminal of N number of switching tube is connected with each other, control terminal of the common end as the switching tube circuit.
4. solar battery MPPT battery charge controller as claimed in claim 3, which is characterized in that the freewheeling circuit includes
M common cathode diode in parallel, M is positive integer, wherein：
The cathode of the M common cathode diodes is connected with each other, first end of the common end as the freewheeling circuit, and M described
The anode of common cathode diode is connected with each other, second end of the common end as the freewheeling circuit.
5. solar battery MPPT battery charge controller as claimed in claim 3, which is characterized in that the freewheeling circuit is specific
For continued flow switch pipe, first end of the first end of the continued flow switch pipe as the freewheeling circuit, the continued flow switch pipe
Second end of the second end as the freewheeling circuit；
Then the control module further includes：
The push-pull circuit being connect respectively with the control terminal of the control chip and the continued flow switch pipe；The control chip is also used
In under the premise of N number of switching tube and the continued flow switch pipe alternate conduction, driven using the push-pull circuit described continuous
Flow switching tube conducting；
And the reduction voltage circuit further includes second buffer circuit in parallel with the continued flow switch pipe.
6. solar battery MPPT battery charge controller as claimed in claim 5, which is characterized in that
First buffer circuit and second buffer circuit include concatenated absorption resistance and Absorption Capacitance.
7. solar battery MPPT battery charge controller as claimed in claim 5, which is characterized in that solar battery MPPT
Battery charge controller further includes the counnter attack switching tube and booster driving circuit for the reverse direction current flow of circuit where preventing,
In：
The first end of the counnter attack switching tube is connect with the anode of the second end of the energy storage inductor and second capacitor respectively,
The anode of the second end of the counnter attack switching tube and the rechargeable battery is connect, the control terminal of the counnter attack switching tube with it is described
Booster driving circuit connection；
Then the control chip is also used to that the counnter attack switching tube is driven to be in always using the booster driving circuit and led completely
Logical state.
8. solar battery MPPT battery charge controller as claimed in claim 7, which is characterized in that solar battery MPPT
Battery charge controller further includes Schottky diode, wherein：
The anode of the Schottky diode respectively with the first end of the counnter attack switching tube, the second end of the energy storage inductor and
Second capacitor anode connection, the cathode of the Schottky diode respectively with the second end of the counnter attack switching tube and institute
State the anode connection of rechargeable battery.
9. solar battery MPPT battery charge controller as claimed in claim 8, which is characterized in that the continued flow switch pipe and
The counnter attack switching tube is specially NMOS tube, and the grid of the NMOS tube is switched as the continued flow switch pipe and the counnter attack
The control terminal of pipe, first end of the drain electrode of the NMOS tube as the continued flow switch pipe and the counnter attack switching tube are described
Second end of the source electrode of NMOS tube as the continued flow switch pipe and the counnter attack switching tube；
N number of switching tube is specially PMOS tube, control terminal of the grid of the PMOS tube as N number of switching tube, institute
State first end of the source electrode of PMOS tube as N number of switching tube, second to drain as N number of switching tube of PMOS tube
End.
10. a kind of solar battery MPPT charging system, which is characterized in that further include that claim 1-9 such as appoints including photovoltaic panel
Solar battery MPPT battery charge controller described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810989668.1A CN108879889A (en) | 2018-08-28 | 2018-08-28 | A kind of solar battery MPPT battery charge controller and its charging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989668.1A CN108879889A (en) | 2018-08-28 | 2018-08-28 | A kind of solar battery MPPT battery charge controller and its charging system |
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Cited By (1)
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| CN110190654A (en) * | 2019-06-27 | 2019-08-30 | 季华实验室 | High-power charging circuit and device |
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