CN212085813U - Reverse connection prevention protection circuit for solar panel - Google Patents
Reverse connection prevention protection circuit for solar panel Download PDFInfo
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- CN212085813U CN212085813U CN202020750626.5U CN202020750626U CN212085813U CN 212085813 U CN212085813 U CN 212085813U CN 202020750626 U CN202020750626 U CN 202020750626U CN 212085813 U CN212085813 U CN 212085813U
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- solar panel
- voltage detection
- signal
- circuit
- coupled
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- 230000002265 prevention Effects 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 claims abstract description 46
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 33
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000010248 power generation Methods 0.000 claims description 2
- 230000017105 transposition Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 4
- 238000010168 coupling process Methods 0.000 abstract 4
- 238000005859 coupling reaction Methods 0.000 abstract 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model relates to a solar panel prevents reverse-connection protection circuit relates to circuit protection's technical field, it includes solar panel and is coupled in solar panel's lithium cell, still including coupling in solar panel with detection solar panel voltage and convert voltage detection signal's voltage detection device, coupling in voltage detection device with receive voltage detection signal and output comparison signal's comparing device, coupling in comparing device and for comparing device provides reference signal's benchmark device and coupling in comparing device, solar panel and lithium cell are with the first switching device who receives comparison signal and output first switching signal. The utility model discloses when having the transposition, solar panel and battery nonconducting for the battery is difficult because of the effect that the transposition damaged.
Description
Technical Field
The utility model belongs to the technical field of circuit protection's technique and specifically relates to a solar panel prevents reverse-connection protection circuit is related to.
Background
The solar controller is a solar energy charge and discharge controller, is an automatic control device used in a solar power generation system for controlling multi-path solar energy to charge a storage battery and the storage battery to supply power to a load of a solar inverter, regulates and controls the charge and discharge conditions of the storage battery, controls the solar panel and the storage battery to output the electric energy to the load according to the power requirement of the load, and is a core control part of the whole photovoltaic power supply system.
In the actual wiring operation, the wiring of the solar panel and the storage battery is easy to be reversely connected, and once the wiring of the solar panel and the storage battery is reversely connected, the storage battery is easy to be damaged, even the storage battery is exploded, and the improvement space is provided.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art existence, the utility model aims at providing a solar panel prevents reverse-connection protection circuit, when the reverse-connection, solar panel and battery do not switch on for the battery is difficult to damage because of the reverse-connection.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a reverse connection prevention protection circuit for a solar panel comprises the solar panel and a lithium battery coupled to the solar panel, and further comprises a voltage detection device coupled to the solar panel for detecting the voltage of the solar panel and converting the voltage into a voltage detection signal, a comparison device coupled to the voltage detection device for receiving the voltage detection signal and outputting a comparison signal, a reference device coupled to the comparison device for providing the reference signal for the comparison device, and a first switch device coupled to the comparison device, the solar panel and the lithium battery for receiving the comparison signal and outputting a first switch signal.
Through adopting above-mentioned technical scheme, when solar panel and lithium cell connect conversely, voltage detection signal is greater than the reference signal, and the low level of comparison device output, switching device control solar panel and lithium cell do not switch on for the battery is difficult to damage because of the transposition, has improved the life of the battery of being connected with solar panel.
The present invention may be further configured in a preferred embodiment as: the voltage detection device comprises a voltage detection circuit and an amplifying circuit, wherein the voltage detection circuit is used for detecting the voltage of the solar panel and converting the voltage into a voltage detection signal, and the amplifying circuit is coupled with the voltage detection circuit to amplify the voltage detection signal.
Through adopting above-mentioned technical scheme, amplifier circuit amplifies the voltage detection signal, has improved solar panel's voltage detection signal's sensitivity.
The present invention may be further configured in a preferred embodiment as: the voltage detection circuit comprises a first resistor R1 with one end electrically connected with the negative electrode of the solar panel and a third resistor R3 with one end electrically connected with the other end of the first resistor R1 and the other end electrically connected with the ground GND.
The present invention may be further configured in a preferred embodiment as: the amplifying circuit includes a power supply VDD and a second resistor R2 having one end electrically connected to the power supply VDD and the other end electrically connected to the other end of the first resistor R1 and one end of the third resistor R3.
The present invention may be further configured in a preferred embodiment as: the first switching device includes a switching circuit and a voltage dividing circuit.
Through adopting above-mentioned technical scheme, when solar panel and lithium cell transposition, switching circuit control solar panel does not switch on with the lithium cell, makes the lithium cell be difficult for damaging because of the transposition when being connected with solar panel, has improved the life of lithium cell.
The present invention may be further configured in a preferred embodiment as: the switching circuit is an Nmos transistor.
By adopting the technical scheme, the reverse protection circuit uses the Nmos transistor, and a diode is not used, so that the voltage drop is smaller, and the dissipation and the useless work are less.
The present invention may be further configured in a preferred embodiment as: the inverter further comprises a not gate circuit coupled to the comparison device for receiving the comparison signal and outputting a not gate logic signal, a second switch device coupled to the not gate circuit for receiving the not gate logic signal and outputting a second switch signal, and an alarm device coupled to the second switch device for receiving the second switch signal and responding to the second switch signal.
Through adopting above-mentioned technical scheme, when solar panel and lithium cell transposition, the low level of comparator output, NOT gate circuit output high level, second switching device switches on, and alarm device gets the electricity and reports an emergency and asks for help or increased vigilance to the staff of working a telephone switchboard to remind the staff in time to adjust, make the lithium cell be difficult for damaging because of with solar panel transposition, improved the life of lithium cell.
The present invention may be further configured in a preferred embodiment as: the alarm device is a sound alarm and/or a light alarm.
By adopting the technical scheme, the alarm device can select sound alarm, light alarm or the combination of the sound alarm and the light alarm according to the use scene.
To sum up, the utility model discloses a following at least one useful technological effect:
1. when the solar panel is reversely connected, the solar panel is not communicated with the storage battery, so that the storage battery is not easy to be damaged due to reverse connection;
2. when solar panel and lithium cell transposition, alarm device has got the electricity and reports an emergency and asks for help or increased vigilance to the staff of working a telephone switchboard to remind the staff in time to adjust, make the lithium cell be difficult for because of damaging with solar panel transposition, improved the life of lithium cell.
Drawings
Fig. 1 is a circuit connection diagram of a solar panel reverse-connection prevention protection circuit of embodiment 1.
Fig. 2 is a circuit connection diagram of a solar panel reverse-connection prevention protection circuit of embodiment 2.
In the figure, 10, solar panel; 20. a lithium battery; 30. a voltage detection device; 31. a voltage detection circuit; 32. an amplifying circuit; 40. a comparison device; 50. a reference device; 60. a first switching device; 61. a switching circuit; 62. a voltage dividing circuit; 70. a not gate circuit; 80. a second switching device; 90. and an alarm device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
referring to fig. 1, an embodiment of an anti-reverse-connection protection circuit for a solar panel 10 includes a solar panel 10, a lithium battery 20, a voltage detection device 30, a comparison device 40, a reference device 50, and a first switch device 60, wherein the solar panel 10 is coupled to the lithium battery 20, the voltage detection device 30 is coupled to the solar panel 10 to detect a voltage of the solar panel 10 and convert the voltage into a voltage detection signal, the comparison device 40 is coupled to the voltage detection device 30 to receive the voltage detection signal and output a comparison signal, the reference device 50 is coupled to the comparison device 40 to provide the reference signal for the comparison device 40, and the first switch device 60 is coupled to the comparison device 40, the solar panel 10, and the lithium battery 20 to receive the comparison signal and output a first switch.
The voltage detection device 30 includes a voltage detection circuit 31 for detecting the voltage of the solar panel 10 and converting the voltage into a voltage detection signal, and an amplification circuit 32 coupled to the voltage detection circuit 31 for amplifying the voltage detection signal; the voltage detection circuit 31 comprises a first resistor R1 and a third resistor R3, wherein one end of the first resistor R1 is electrically connected with the negative electrode of the solar panel 10, the other end of the first resistor R1 is electrically connected with one end of the third resistor R3, and the other end of the third resistor R3 is electrically connected with the ground GND; the amplifying circuit 32 includes a second resistor R2, one end of the second resistor R2 is electrically connected to the power supply VDD, and the other end of the second resistor R2 is electrically connected to the other end of the first resistor R1 and one end of the third resistor R3.
The comparison device 40 is a comparator N1, the reference device 50 includes a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 is electrically connected to the power supply VDD, the other end of the fourth resistor R4 is electrically connected to one end of the fifth resistor R5 and a unidirectional input terminal of the comparator N1, the other end of the fifth resistor R5 is electrically connected to ground GND, and an inverted input terminal of the comparator N1 is electrically connected to the other end of the first resistor R1, the other end of the second resistor R2 and one end of the third resistor R3.
The first switching device 60 comprises a switching circuit 61 and a voltage dividing circuit 62, the switching circuit 61 is an Nmos transistor, the voltage dividing circuit 62 is a sixth resistor R6, one end of the sixth resistor R6 is electrically connected with the output end of the comparator N1, the other end of the sixth resistor R6 is electrically connected with a pin 1 of the Nmos transistor, a pin 2 of the Nmos transistor is electrically connected with the negative electrode of the solar panel 10, a pin 3 of the Nmos transistor is electrically connected with the negative electrode of the lithium battery 20 and the ground GND, and the positive electrode of the solar panel 10 is electrically connected with the positive electrode of the lithium battery 20.
The implementation principle of the embodiment is as follows: when the wiring of the solar panel 10 and the lithium battery 20 is correct, the positive voltage VS + of the solar panel 10 is in a high level state, the voltage detection signal is smaller than the reference signal, the comparator N1 outputs a high level, the Nmos transistor is conducted, and the solar panel 10 is conducted with the lithium battery 20; the solar panel 10 is reversely connected with the lithium battery 20, the negative voltage VS-of the solar panel 10 is in a high level state, the voltage detection signal is larger than the reference signal, the comparator N1 outputs a low level, the Nmos transistor is not conducted, and the solar panel 10 is not conducted with the lithium battery 20.
Example 2:
the difference from embodiment 1 is that the apparatus further includes a not-gate circuit 70, a second switching device 80 and an alarm device 90, the not-gate circuit 70 is coupled to the comparison device 40 to receive the comparison signal and output the not-gate logic signal, the second switching device 80 is coupled to the not-gate circuit 70 to receive the not-gate logic signal and output a second switching signal, and the alarm device 90 is coupled to the second switching device 80 to receive the second switching signal and respond to the second switching signal.
The second switching device 80 includes a first capacitor C1, a seventh resistor R7, an eighth resistor R8, and a first transistor Q1, an input terminal of the not-gate circuit 70 is electrically connected to an output terminal of the comparator N1 and one terminal of the sixth resistor R6, an output terminal of the not-gate circuit 70 is electrically connected to one terminal of the seventh resistor R7 and one terminal of the first capacitor C1, another terminal of the seventh resistor R7 is electrically connected to another terminal of the first capacitor C1, one terminal of the eighth resistor R8, and a base of the first transistor Q1, and another terminal of the eighth resistor R8 is electrically connected to an emitter of the first transistor Q1 and the ground GND.
The alarm device 90 may be an audio alarm, a light alarm, or a combination thereof, where the alarm device 90 is preferably a light alarm, the alarm device 90 is a light emitting diode D1, the anode of the light emitting diode D1 is electrically connected to the anode VB + of the lithium battery 20, and the cathode of the light emitting diode D1 is electrically connected to the collector of the first transistor Q1.
The implementation principle of the embodiment is as follows: when the wiring of the solar panel 10 and the lithium battery 20 is correct, the positive voltage VS + of the solar panel 10 is in a high level state, the voltage detection signal is smaller than the reference signal, the comparator N1 outputs a high level, the Nmos transistor is conducted, the solar panel 10 is conducted with the lithium battery 20, the first triode Q1 is not conducted, and the light emitting diode D1 is not started; the solar panel 10 is reversely connected with the lithium battery 20, the negative voltage VS-of the solar panel 10 is in a high level state, the voltage detection signal is larger than the reference signal, the comparator N1 outputs a low level, the Nmos transistor is not conducted, the solar panel 10 is not conducted with the lithium battery 20, the first triode Q1 is conducted, the light emitting diode D1 is started, and a person on the junction line is reminded.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. A solar panel reverse-connection prevention protection circuit comprises a solar panel (10) and a lithium battery (20) coupled to the solar panel (10), and is characterized in that: the solar photovoltaic power generation system further comprises a voltage detection device (30) coupled to the solar panel (10) for detecting the voltage of the solar panel (10) and converting the voltage into a voltage detection signal, a comparison device (40) coupled to the voltage detection device (30) for receiving the voltage detection signal and outputting a comparison signal, a reference device (50) coupled to the comparison device (40) for providing a reference signal for the comparison device (40), and a first switch device (60) coupled to the comparison device (40), the solar panel (10) and the lithium battery (20) for receiving the comparison signal and outputting a first switch signal.
2. The solar panel reverse-connection-prevention protection circuit of claim 1, characterized in that: the voltage detection device (30) comprises a voltage detection circuit (31) for detecting the voltage of the solar panel (10) and converting the voltage into a voltage detection signal, and an amplification circuit (32) coupled to the voltage detection circuit (31) for amplifying the voltage detection signal.
3. The solar panel reverse-connection-prevention protection circuit of claim 2, wherein: the voltage detection circuit (31) comprises a first resistor R1 with one end electrically connected with the negative electrode of the solar panel (10) and a third resistor R3 with one end electrically connected with the other end of the first resistor R1 and the other end electrically connected with the ground GND.
4. The solar panel reverse-connection-prevention protection circuit according to claim 3, characterized in that: the amplifying circuit (32) includes a power supply VDD and a second resistor R2 having one end electrically connected to the power supply VDD and the other end electrically connected to the other end of the first resistor R1 and one end of the third resistor R3.
5. The solar panel reverse-connection-prevention protection circuit of claim 1, characterized in that: the first switching device (60) includes a switching circuit (61) and a voltage dividing circuit (62).
6. The solar panel reverse-connection-prevention protection circuit of claim 5, wherein: the switch circuit (61) is an Nmos transistor.
7. The solar panel reverse-connection-prevention protection circuit of claim 1, characterized in that: also included is a not gate circuit (70) coupled to the comparison device (40) to receive the comparison signal and output a not gate logic signal, a second switch device (80) coupled to the not gate circuit (70) to receive the not gate logic signal and output a second switch signal, and an alarm device (90) coupled to the second switch device (80) to receive the second switch signal and responsive to the second switch signal.
8. The solar panel reverse-connection-prevention protection circuit of claim 7, wherein: the alarm device (90) is an audio alarm and/or a light alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020750626.5U CN212085813U (en) | 2020-05-08 | 2020-05-08 | Reverse connection prevention protection circuit for solar panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020750626.5U CN212085813U (en) | 2020-05-08 | 2020-05-08 | Reverse connection prevention protection circuit for solar panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212085813U true CN212085813U (en) | 2020-12-04 |
Family
ID=73568829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020750626.5U Expired - Fee Related CN212085813U (en) | 2020-05-08 | 2020-05-08 | Reverse connection prevention protection circuit for solar panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212085813U (en) |
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2020
- 2020-05-08 CN CN202020750626.5U patent/CN212085813U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20201204 |