CN201928053U - Solar charging PWM (pulse-width modulation) controller - Google Patents
Solar charging PWM (pulse-width modulation) controller Download PDFInfo
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- CN201928053U CN201928053U CN2011200109951U CN201120010995U CN201928053U CN 201928053 U CN201928053 U CN 201928053U CN 2011200109951 U CN2011200109951 U CN 2011200109951U CN 201120010995 U CN201120010995 U CN 201120010995U CN 201928053 U CN201928053 U CN 201928053U
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- control circuit
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Abstract
The utility model provides an efficient and accurate solar charging PWM (pulse-width modulation) controller which comprises a photovoltaic battery board, a voltage stabilizing circuit, a PWM control circuit, a driving circuit, a storage battery and a switch circuit, wherein the input end of the voltage stabilizing circuit is connected with the positive electrode of the photovoltaic battery board; the output end of the voltage stabilizing circuit is connected with the input end of the PWM control circuit to provide working voltage to the PWM control circuit; the input end of the PWM control circuit is connected with the positive electrode of the photovoltaic battery board, and the output end of the PWM control circuit is connected with the driving circuit; the driving circuit is connected with the negative electrode of the storage battery through the switch circuit; the positive electrode of the storage battery is connected with the positive electrode of the photovoltaic battery board; the negative electrode of the storage battery is connected with the negative electrode of the photovoltaic battery board through the switch circuit; and the PWM control circuit charges the storage battery through a PWM signal instruction driving circuit and the switch circuit.
Description
Technical field
The utility model relates to solar charger, especially relates to a kind of solar charging controller.
Background technology
Solar energy generation technology is to utilize photovoltaic battery panel (PV plate) to absorb solar energy to be converted into electric energy, by the energy storage that charges a battery, export DC low-voltage then, or changing conventional civil power such as 220V into through photovoltaic DC-to-AC converter uses to offer load, thereby realizes the environmental protection and energy saving energy that solar energy source is utilized.Wherein, giving the core devices of solar recharging is the PWM controller, and its performance and design level directly affect the efficient and the cost performance of system, even working life and maintenance cost, particularly have influence on the useful life of storage battery.Existing parallel charging PWM controller influences the useful life of photovoltaic battery panel when being full of electricity to the photovoltaic battery panel output short-circuit, and the existing tandem charging PWM controller that adopts increases energy consumption because of the pressure drop of the diode of use, thereby the increase charging interval is reduced charge efficiency.
Summary of the invention
In order to solve the defective that above-mentioned solar recharging PWM controller exists, the utility model provides efficient accurate solar recharging PWM controller.
Above-mentioned solar recharging PWM controller comprises photovoltaic battery panel, voltage stabilizing circuit, pwm control circuit, drive circuit, storage battery and switching circuit, described voltage stabilizing circuit input connects the positive pole of photovoltaic battery panel, thereby circuit output end of pressure-stabilizing connects the input of pwm control circuit offers the pwm control circuit operating voltage, the input of pwm control circuit connects the positive pole of photovoltaic battery panel, the output of pwm control circuit connects drive circuit, drive circuit connects the negative pole of storage battery by switching circuit, the positive pole of storage battery connects the positive pole of photovoltaic battery panel, the negative pole of storage battery is by the negative pole of switching circuit connection photovoltaic battery panel, and described pwm control circuit charges to storage battery by pwm signal indication drive circuit and switching circuit.
Above-mentioned solar recharging PWM controller brings following effect: by pwm control circuit output pwm signal indication drive circuit driving switch circuit storage battery is charged; because charging current precision height; electric current during charging is more stable; fluctuating range is very little; make charging current approach the optimal charge electric current of storage battery; thereby the energy that is charged in the battery in the identical charging interval is higher; improve the charging operating efficiency; and it is very little to the rush of current of storage battery; also little to the battery infringement, can protect battery well.
The improvement of above-mentioned solar recharging PWM controller is that said switching circuit comprises a N channel enhancement metal-oxide-semiconductor field effect transistor and the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor that is connected with drive circuit, the source electrode of the one N channel enhancement metal-oxide-semiconductor field effect transistor connects battery terminal negative, the drain electrode of the one N channel enhancement metal-oxide-semiconductor field effect transistor connects the drain electrode of the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor, the source electrode of the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor connects the negative pole of photovoltaic battery panel, field effect transistor by using two serial connections is as the switch of charging circuit, can make the loss of voltage of charging circuit use the charging circuit of diode reduce near half, improve charge efficiency.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Description of drawings
Fig. 1 is the circuit block diagram of solar recharging PWM controller embodiment of the present utility model.
Fig. 2 is the circuit diagram of solar recharging PWM controller embodiment of the present utility model.
Embodiment
As Fig. 1, shown in Figure 2, solar recharging PWM controller embodiment of the present utility model, comprise photovoltaic battery panel PV, voltage stabilizing circuit, pwm control circuit, drive circuit, storage battery BT1 and switching circuit, pwm control circuit is pwm chip U1, its model is PIC16F716, provide 5V operating voltage after the voltage stabilizing of voltage stabilizing circuit process secondary, the one-level voltage stabilizing comprises electric capacity E1, resistance R 1, voltage-stabiliser tube WZ1 and triode Q1, the secondary voltage stabilizing comprises electric capacity E2, resistance R 2, resistance R 3, resistance R X, resistance R 5, voltage-stabiliser tube WZ2 and triode Q2, the voltage stabilizing circuit input connects the positive pole of photovoltaic battery panel PV, thereby circuit output end of pressure-stabilizing connects the operating voltage that the pin 14 of pwm chip U1 offers its 5V, the pin 1 of pwm chip U1, the positive pole that pin 17 connects photovoltaic battery panel PV is used to receive the voltage signal of sampling photovoltaic battery panel PV and storage battery BT1, drive circuit comprises the operating circuit that two route pwm chip output signals drive, No. one operating circuit connects the pin 11 of pwm chip U1, comprise resistance R 17, R18, R19, R20, R21 and triode Q4, Q5, Q6, and be connected with the grid G 1 of a N channel enhancement metal-oxide-semiconductor field effect transistor N1 of switching circuit; Another road operating circuit connects the pin 10 of pwm chip U1, comprise resistance R 22, R23, R24, R25, R26, R27, triode Q7, Q8 and optocoupler U2, and be connected with the grid G 2 of the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor N2 of switching circuit, the source S 1 of a N channel enhancement metal-oxide-semiconductor field effect transistor N1 connects storage battery BT1 negative pole simultaneously, the source S 2 of drain D 2, the two N channel enhancement metal-oxide-semiconductor field effect transistor N2 of drain D 1 connection the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor N2 of the one N channel enhancement metal-oxide-semiconductor field effect transistor N1 connects the negative pole of photovoltaic battery panel PV.Pwm chip U1 is by detecting the voltage of solar panel PV and storage battery BT1, and by the intelligence computation output pwm signal, through driver circuit control field effect transistor N1 and N2 conducting, accumulators BT1 charges.
Claims (3)
1. solar recharging PWM controller, it is characterized in that: comprise photovoltaic battery panel, voltage stabilizing circuit, pwm control circuit, drive circuit, storage battery and switching circuit, described voltage stabilizing circuit input connects the positive pole of photovoltaic battery panel, thereby circuit output end of pressure-stabilizing connects the input of pwm control circuit offers the pwm control circuit operating voltage, the input of pwm control circuit connects the positive pole of photovoltaic battery panel, the output of pwm control circuit connects drive circuit, drive circuit connects the negative pole of storage battery by switching circuit, the positive pole of storage battery connects the positive pole of photovoltaic battery panel, the negative pole of storage battery is by the negative pole of switching circuit connection photovoltaic battery panel, and described pwm control circuit charges to storage battery by pwm signal indication drive circuit and switching circuit.
2. solar recharging PWM controller according to claim 1, it is characterized in that: described switching circuit comprises a N channel enhancement metal-oxide-semiconductor field effect transistor (N1) and the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor (N2) that is connected with drive circuit, the source electrode of the one N channel enhancement metal-oxide-semiconductor field effect transistor (N1) connects battery terminal negative, the drain electrode of the one N channel enhancement metal-oxide-semiconductor field effect transistor (N1) connects the drain electrode of the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor (N2), and the source electrode of the 2nd N channel enhancement metal-oxide-semiconductor field effect transistor (N2) connects the negative pole of photovoltaic battery panel.
3. solar recharging PWM controller according to claim 1 and 2 is characterized in that: described pwm control circuit is pwm chip PIC16F716.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200109951U CN201928053U (en) | 2011-01-14 | 2011-01-14 | Solar charging PWM (pulse-width modulation) controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200109951U CN201928053U (en) | 2011-01-14 | 2011-01-14 | Solar charging PWM (pulse-width modulation) controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928053U true CN201928053U (en) | 2011-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200109951U Expired - Fee Related CN201928053U (en) | 2011-01-14 | 2011-01-14 | Solar charging PWM (pulse-width modulation) controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201928053U (en) |
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2011
- 2011-01-14 CN CN2011200109951U patent/CN201928053U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20130114 |