CN219918485U - Photovoltaic controller - Google Patents
Photovoltaic controller Download PDFInfo
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- CN219918485U CN219918485U CN202320913413.3U CN202320913413U CN219918485U CN 219918485 U CN219918485 U CN 219918485U CN 202320913413 U CN202320913413 U CN 202320913413U CN 219918485 U CN219918485 U CN 219918485U
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- 238000000034 method Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 69
- 230000001052 transient effect Effects 0.000 claims description 10
- 238000010248 power generation Methods 0.000 claims description 2
- 238000007600 charging Methods 0.000 abstract description 45
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000010277 constant-current charging Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a photovoltaic controller, relates to the technical field of photovoltaics, and solves the problems that the battery charging speed of a conventional photovoltaic system cannot be ensured and the loss of the battery is reduced. The key points of the technical scheme are as follows: the input circuit, the power control circuit and the current-limiting output circuit are sequentially connected, the input end of the control IC circuit is connected with the output end of the input circuit, and the output end of the control IC circuit is respectively connected with the input end of the power control circuit and the input end of the current-limiting output circuit. The control IC circuit is used for monitoring the battery voltage and the photovoltaic panel voltage input by the input circuit, and the power control circuit is controlled to realize battery charging according to the monitored battery voltage and the monitored photovoltaic panel voltage, and then the current-limiting output circuit is used for adjusting the charging power in the battery charging process, so that the purpose of reducing the battery loss while guaranteeing the battery charging speed is achieved.
Description
Technical Field
The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic controller.
Background
The photovoltaic controller is used for effectively charging the electric energy generated by the photovoltaic panel into the battery, so that the storage of the photovoltaic electric energy is realized.
At present, the main current mode of charging the photovoltaic system battery is constant-voltage current-limiting charging or constant-current voltage-limiting charging. The constant voltage current-limiting charging has high charging speed and low energy consumption, but the initial charging voltage is too large, so that the battery is easily damaged, and the later charging current is low, so that the battery cannot be fully charged. Constant-current voltage-limiting charging can quickly supplement the electric quantity of the battery in the initial charging stage, but the whole charging time is long, and the battery is easy to damage due to overlarge charging current in the later stage.
Therefore, the battery charging of the existing photovoltaic system has the problem that the battery loss can not be reduced while the battery charging speed is ensured.
Disclosure of Invention
The utility model aims to provide a photovoltaic controller, which solves the problems that the battery charging speed of the conventional photovoltaic system cannot be ensured and the battery loss is reduced.
The technical aim of the utility model is realized by the following technical scheme:
a photovoltaic controller, comprising: the photovoltaic power generation device comprises an input circuit, a power control circuit and a current-limiting output circuit which are connected in sequence, wherein the input end of the input circuit is used for being connected with a photovoltaic panel, and the output end of the current-limiting output circuit is used for being connected with a battery; the input end of the control IC circuit is connected with the output end of the input circuit, and the output end of the control IC circuit is respectively connected with the input end of the power control circuit and the input end of the current-limiting output circuit.
Optionally, the input circuit includes a MOS transistor Q1, an electrolytic capacitor C4, an electrolytic capacitor C6, a resistor R14, and a capacitor C3; the drain electrode of the MOS tube Q1 is used for being connected with a photovoltaic panel; the source electrode of the MOS tube Q1 is connected with one end of the resistor R14, one end of the capacitor C3, the anode of the electrolytic capacitor C4 and the anode of the electrolytic capacitor C6; the grid electrode of the MOS tube Q1 is connected with the other end of the resistor R14, the other end of the capacitor C3 and the control IC circuit; the negative electrode of the electrolytic capacitor C4 and the negative electrode of the electrolytic capacitor C6 are grounded.
Optionally, the input circuit further comprises a transient diode TVS1; one end of the transient diode TVS1 is connected with the drain electrode of the MOS tube Q1; the other end of the transient diode TVS1 is grounded.
Optionally, the control IC circuit includes a control chip U1, a voltage control circuit, and a current control circuit; the pin 1 of the control chip U1 is connected with the grid electrode of the MOS tube Q1; the pin 3 and the pin 4 of the control chip U1 are connected with the source electrode of the MOS tube Q1 through a voltage control circuit; and the pin 7 and the pin 8 of the control chip U1 are connected with the current-limiting output circuit through the current control circuit.
Optionally, the voltage control circuit includes a resistor R3, a resistor R5, a resistor R6, a resistor R8, and an LED1; the pin 3 of the control chip U1 is connected with one end of a resistor R8 through an LED1; the pin 4 of the control chip U1 is connected with one end of the resistor R3, one end of the resistor R5 and one end of the resistor R6; the other end of the resistor R3, the other end of the resistor R5 and the other end of the resistor R8 are connected with the source electrode of the MOS tube Q1; the other end of the resistor R6 is grounded.
Optionally, the current control circuit includes a resistor R7, a resistor R10, a resistor R11, a resistor R12, and a resistor R13; the pin 8 of the control chip U1 is connected with a current-limiting output circuit through a resistor R7; one end of the resistor R10, one end of the resistor R11 and one end of the resistor R12 are all connected with the No. 6 pin of the control chip U1; one end of the resistor R13 is connected with the other end of the resistor R11, the other end of the resistor R12 and the current-limiting output circuit; the other end of the resistor R13 is connected with a pin 7 of the control chip U1; the other end of the resistor R10 is grounded.
Optionally, the power control circuit includes a MOS transistor Q2, a diode D1, and an inductor L1; the source electrode of the MOS tube Q2 is connected with the source electrode of the MOS tube Q1; the grid electrode of the MOS tube Q2 is connected with a No. 10 pin of the control chip U1; the drain electrode of the MOS tube Q2 is connected with the cathode of the diode D1 and one end of the inductor L1; the other end of the inductor L1 is connected with a current-limiting output circuit.
Optionally, the current-limiting output circuit comprises a resistor R1, a resistor R2, a capacitor C1 and an electrolytic capacitor C2; one end of the resistor R1, one end of the resistor R2 and the other end of the inductor L1 are connected with the No. 8 pin of the control chip U1 through a resistor R7; the other end of the resistor R1, the other end of the resistor R2, one end of the capacitor C1, the anode of the electrolytic capacitor C2 and one end of the resistor R13 are connected with the battery.
Optionally, the control IC circuit further includes a resistor R4, a capacitor C5, and a capacitor C8; the pin 9 of the control chip U1 is connected with one end of the resistor R4 and one end of the capacitor C5; the other end of the capacitor C5 and one end of the capacitor C8 are connected with the negative electrode of the electrolytic capacitor C4; the other end of the capacitor C8 and the other end of the resistor R4 are connected with the source electrode of the MOS tube Q1.
Optionally, the control IC circuit further includes a resistor R9 and a capacitor C7; one end of a pin 2 of the control chip U1 and one end of a capacitor C7 are grounded; and a pin 5 of the control chip U1 is connected with the other end of the capacitor C7 through a resistor R9.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the input circuit, the power control circuit and the current-limiting output circuit are sequentially connected, the input end of the control IC circuit is connected with the output end of the input circuit, and the output end of the control IC circuit is respectively connected with the input end of the power control circuit and the input end of the current-limiting output circuit. The input end of the input circuit is connected with the photovoltaic panel, the output end of the current-limiting output circuit is connected with the battery, the control IC circuit monitors the battery voltage and the photovoltaic panel voltage input by the input circuit, the power control circuit is controlled to charge the battery according to the monitored battery voltage and the monitored photovoltaic panel voltage, and the charging power of the battery in the charging process is regulated by the current-limiting output circuit, so that the purpose of reducing the battery loss while guaranteeing the battery charging speed is achieved.
(2) And the input circuit is used as an anti-reflection element, so that when the voltage of the photovoltaic panel is powered down, the reverse flowing of the battery voltage into the photovoltaic panel is avoided.
(3) The current-limiting output circuit is utilized to filter the charging voltage of the battery so as to achieve the purposes of reducing the battery loss and prolonging the service life of the battery.
(4) And the control IC circuit and the power control circuit are utilized to realize battery charging control, the lowest charging voltage of the photovoltaic panel and the setting of battery charging voltage.
(5) The photovoltaic controller has the advantages of low charging power, low requirement on internal power elements, no need of extra heat dissipation measures, simple circuit and low cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
fig. 1 is a schematic system configuration diagram of a photovoltaic controller in the present embodiment;
fig. 2 is a schematic circuit diagram of a photovoltaic controller in the present embodiment.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
Examples:
a photovoltaic controller, as shown in fig. 1, comprising: an input circuit, a power control circuit, a current-limiting output circuit and a control IC circuit. The input circuit, the power control circuit and the current-limiting output circuit are sequentially connected, the input end of the control IC circuit is connected with the output end of the input circuit, and the output end of the control IC circuit is respectively connected with the input end of the power control circuit and the input end of the current-limiting output circuit. When the photovoltaic controller is used, the input end of the input circuit in the photovoltaic controller is connected with the photovoltaic panel, the output end of the current-limiting output circuit is connected with the battery, the battery voltage and the photovoltaic panel voltage input by the input circuit are monitored by the control IC circuit, the power control circuit is controlled to charge the battery according to the monitored battery voltage and the monitored photovoltaic panel voltage, and then in the charging process, the control IC circuit is used for controlling the current-limiting output circuit to regulate the charging power of the battery in the charging process, so that the purpose of reducing the battery loss while guaranteeing the battery charging speed is achieved.
An alternative implementation manner of this embodiment, as shown in fig. 2, the input circuit includes a MOS transistor Q1, an electrolytic capacitor C4, an electrolytic capacitor C6, a resistor R14, and a capacitor C3. The drain electrode of the MOS tube Q1 is connected with the photovoltaic panel, the source electrode of the MOS tube Q1 is connected with one end of the resistor R14, one end of the capacitor C3, the anode of the electrolytic capacitor C4 and the anode of the electrolytic capacitor C6, the grid electrode of the MOS tube Q1 is connected with the other end of the resistor R14, the other end of the capacitor C3 and the control IC circuit, and the cathode of the electrolytic capacitor C4 and the cathode of the electrolytic capacitor C6 are grounded. According to the input circuit, the anti-reflection element is formed in the photovoltaic controller, so that the purpose of preventing the battery voltage from flowing backwards into the photovoltaic panel when the voltage of the photovoltaic panel is powered down in the battery charging process is achieved.
As shown in fig. 2, the input circuit further includes a transient diode TVS1, one end of the transient diode TVS1 is connected to the drain of the MOS transistor Q1, and the other end of the transient diode TVS1 is grounded. The transient diode TVS1 is used as an overvoltage protection element to be arranged in the photovoltaic controller, so that the purpose of filtering peak voltage of the photovoltaic panel and protecting the controller from being damaged is achieved.
As shown in fig. 2, the control IC circuit includes a control chip U1, a voltage control circuit, and a current control circuit. The voltage control circuit comprises a resistor R3, a resistor R5, a resistor R6, a resistor R8 and an LED1, and the current control circuit comprises a resistor R7, a resistor R10, a resistor R11, a resistor R12 and a resistor R13. The No. 1 pin of the control chip U1 is connected with the grid electrode of the MOS tube Q1, the No. 3 pin of the control chip U1 is connected with one end of a resistor R8 through an LED1, the No. 4 pin of the control chip U1 is connected with one end of a resistor R3, one end of a resistor R5 and one end of a resistor R6, the other end of the resistor R3, the other end of the resistor R5 and the other end of the resistor R8 are connected with the source electrode of the MOS tube Q1, and the other end of the resistor R6 is grounded. The No. 8 pin of the control chip U1 is connected with the current-limiting output circuit through a resistor R7, one end of a resistor R10, one end of a resistor R11 and one end of a resistor R12 are all connected with the No. 6 pin of the control chip U1, one end of a resistor R13 is all connected with the other end of the resistor R11, the other end of the resistor R12 and the current-limiting output circuit, the other end of the resistor R13 is connected with the No. 7 pin of the control chip U1, and the other end of the resistor R10 is grounded. And a control IC circuit in the photovoltaic controller respectively realizes the setting of the lowest voltage value and the constant current charging current through a voltage control circuit and a current control circuit.
As shown in fig. 2, the power control circuit includes a MOS transistor Q2, a diode D1, and an inductor L1. The source electrode of the MOS tube Q2 is connected with the source electrode of the MOS tube Q1, the grid electrode of the MOS tube Q2 is connected with the No. 10 pin of the control chip U1, the drain electrode of the MOS tube Q2 is connected with the cathode of the diode D1 and one end of the inductor L1, and the other end of the inductor L1 is connected with the current-limiting output circuit. The purpose that the control IC circuit controls battery charging, the lowest charging voltage of the photovoltaic panel and the battery charging voltage setting are achieved through the power control circuit is achieved.
An alternative implementation manner of this embodiment, as shown in fig. 2, the current-limiting output circuit includes a resistor R1, a resistor R2, a capacitor C1, and an electrolytic capacitor C2. One end of the resistor R1, one end of the resistor R2 and the other end of the inductor L1 are all connected with the No. 8 pin of the control chip U1 through the resistor R7, and the other end of the resistor R1, the other end of the resistor R2, one end of the capacitor C1, the anode of the electrolytic capacitor C2 and one end of the resistor R13 are all connected with a battery. The purpose of setting the maximum power point voltage through two resistors of a current-limiting output circuit in the photovoltaic controller is achieved.
In an alternative implementation manner of this embodiment, as shown in fig. 2, the control IC circuit further includes a resistor R4, a capacitor C5, and a capacitor C8, where pin 9 of the control chip U1 is connected to one end of the resistor R4 and one end of the capacitor C5, and the other end of the capacitor C5 and one end of the capacitor C8 are connected to the negative electrode of the electrolytic capacitor C4, and the other end of the capacitor C8 and the other end of the resistor R4 are connected to the source electrode of the MOS transistor Q1.
In an alternative implementation manner of this embodiment, as shown in fig. 2, the control IC circuit further includes a resistor R9 and a capacitor C7, where one end of the pin 2 of the control chip U1 and one end of the capacitor C7 are grounded, and the pin 5 of the control chip U1 is connected to the other end of the capacitor C7 through the resistor R9.
In a use scene, a control chip U1 of the photovoltaic controller adopts an MPPT control chip as a core chip of the controller, so that the charging control of the photovoltaic panel is realized, and meanwhile, the photovoltaic panel has trickle, constant current, overcharge and floating charging modes.
And the constant-current charging current is set to be 2A by using a control IC circuit in the photovoltaic controller, and when the photovoltaic voltage is larger than the lowest voltage value set by the control IC circuit in the photovoltaic controller and is larger than the battery voltage, the photovoltaic controller normally works to charge the battery. When the battery voltage is lower than 75% of the overcharge voltage set by the photovoltaic controller, the photovoltaic controller automatically enters a trickle charge mode, and the charging current is 17.5% of the constant-current charging current set by the photovoltaic controller. When the battery voltage is greater than 75% of the overcharge voltage set by the photovoltaic controller, the photovoltaic controller enters a constant-current charging mode to charge at constant 2A. When the battery voltage continues to rise close to the overcharge voltage, the photovoltaic controller enters an overcharge mode, and the charge current gradually decreases. When the charging current is reduced to 38% of the constant current charging current, the photovoltaic controller enters a float charging mode, and the charging voltage is modulated at the float charging voltage to maintain the low current charging of the battery. When the photovoltaic controller is in a floating state, if the input power is disconnected and the photovoltaic controller is re-connected, a new charging period is started. If the battery is charged by constant voltage, the photovoltaic controller tracks the maximum power point voltage of the battery (the maximum power point voltage is set by two resistors of a current-limiting output circuit in the photovoltaic controller), when the voltage of the photovoltaic panel is powered down, the photovoltaic controller automatically enters a sleep mode, and an internal circuit is turned off, so that the purposes of reducing the current consumption of the battery and prolonging the standby time are achieved.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. A photovoltaic controller, comprising:
the photovoltaic power generation device comprises an input circuit, a power control circuit and a current-limiting output circuit which are connected in sequence, wherein the input end of the input circuit is used for being connected with a photovoltaic panel, and the output end of the current-limiting output circuit is used for being connected with a battery;
the input end of the control IC circuit is connected with the output end of the input circuit, and the output end of the control IC circuit is respectively connected with the input end of the power control circuit and the input end of the current-limiting output circuit;
the method is characterized in that:
the input circuit comprises a MOS tube Q1, an electrolytic capacitor C4, an electrolytic capacitor C6, a resistor R14 and a capacitor C3;
the drain electrode of the MOS tube Q1 is used for being connected with a photovoltaic panel;
the source electrode of the MOS tube Q1 is connected with one end of the resistor R14, one end of the capacitor C3, the anode of the electrolytic capacitor C4 and the anode of the electrolytic capacitor C6;
the grid electrode of the MOS tube Q1 is connected with the other end of the resistor R14, the other end of the capacitor C3 and the control IC circuit;
the negative electrode of the electrolytic capacitor C4 and the negative electrode of the electrolytic capacitor C6 are grounded;
the control IC circuit comprises a control chip U1, a voltage control circuit and a current control circuit;
the pin 1 of the control chip U1 is connected with the grid electrode of the MOS tube Q1;
the pin 3 and the pin 4 of the control chip U1 are connected with the source electrode of the MOS tube Q1 through a voltage control circuit;
and the pin 7 and the pin 8 of the control chip U1 are connected with the current-limiting output circuit through the current control circuit.
2. A photovoltaic controller according to claim 1, characterized in that:
the input circuit further comprises a transient diode TVS1;
one end of the transient diode TVS1 is connected with the drain electrode of the MOS tube Q1;
the other end of the transient diode TVS1 is grounded.
3. A photovoltaic controller according to claim 1, characterized in that:
the voltage control circuit comprises a resistor R3, a resistor R5, a resistor R6, a resistor R8 and an LED1;
the pin 3 of the control chip U1 is connected with one end of a resistor R8 through an LED1;
the pin 4 of the control chip U1 is connected with one end of the resistor R3, one end of the resistor R5 and one end of the resistor R6;
the other end of the resistor R3, the other end of the resistor R5 and the other end of the resistor R8 are connected with the source electrode of the MOS tube Q1;
the other end of the resistor R6 is grounded.
4. A photovoltaic controller according to claim 1, characterized in that:
the current control circuit comprises a resistor R7, a resistor R10, a resistor R11, a resistor R12 and a resistor R13;
the pin 8 of the control chip U1 is connected with a current-limiting output circuit through a resistor R7;
one end of the resistor R10, one end of the resistor R11 and one end of the resistor R12 are all connected with the No. 6 pin of the control chip U1;
one end of the resistor R13 is connected with the other end of the resistor R11, the other end of the resistor R12 and the current-limiting output circuit;
the other end of the resistor R13 is connected with a pin 7 of the control chip U1;
the other end of the resistor R10 is grounded.
5. A photovoltaic controller according to claim 4, wherein:
the power control circuit comprises a MOS tube Q2, a diode D1 and an inductor L1;
the source electrode of the MOS tube Q2 is connected with the source electrode of the MOS tube Q1;
the grid electrode of the MOS tube Q2 is connected with a No. 10 pin of the control chip U1;
the drain electrode of the MOS tube Q2 is connected with the cathode of the diode D1 and one end of the inductor L1;
the other end of the inductor L1 is connected with a current-limiting output circuit.
6. A photovoltaic controller according to claim 5, wherein:
the current-limiting output circuit comprises a resistor R1, a resistor R2, a capacitor C1 and an electrolytic capacitor C2;
one end of the resistor R1, one end of the resistor R2 and the other end of the inductor L1 are connected with the No. 8 pin of the control chip U1 through a resistor R7;
the other end of the resistor R1, the other end of the resistor R2, one end of the capacitor C1, the anode of the electrolytic capacitor C2 and one end of the resistor R13 are connected with the battery.
7. A photovoltaic controller according to any one of claims 1 or 5, wherein:
the control IC circuit also comprises a resistor R4, a capacitor C5 and a capacitor C8;
the pin 9 of the control chip U1 is connected with one end of the resistor R4 and one end of the capacitor C5;
the other end of the capacitor C5 and one end of the capacitor C8 are connected with the negative electrode of the electrolytic capacitor C4;
the other end of the capacitor C8 and the other end of the resistor R4 are connected with the source electrode of the MOS tube Q1.
8. A photovoltaic controller according to claim 1, characterized in that:
the control IC circuit also comprises a resistor R9 and a capacitor C7;
one end of a pin 2 of the control chip U1 and one end of a capacitor C7 are grounded;
and a pin 5 of the control chip U1 is connected with the other end of the capacitor C7 through a resistor R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320913413.3U CN219918485U (en) | 2023-04-21 | 2023-04-21 | Photovoltaic controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320913413.3U CN219918485U (en) | 2023-04-21 | 2023-04-21 | Photovoltaic controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219918485U true CN219918485U (en) | 2023-10-27 |
Family
ID=88428024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320913413.3U Active CN219918485U (en) | 2023-04-21 | 2023-04-21 | Photovoltaic controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219918485U (en) |
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2023
- 2023-04-21 CN CN202320913413.3U patent/CN219918485U/en active Active
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