CN202872363U - Reverse-connection preventive circuit for photovoltaic convergence box photovoltaic battery string - Google Patents
Reverse-connection preventive circuit for photovoltaic convergence box photovoltaic battery string Download PDFInfo
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- CN202872363U CN202872363U CN 201220562634 CN201220562634U CN202872363U CN 202872363 U CN202872363 U CN 202872363U CN 201220562634 CN201220562634 CN 201220562634 CN 201220562634 U CN201220562634 U CN 201220562634U CN 202872363 U CN202872363 U CN 202872363U
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- photovoltaic
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- switching tube
- bus rod
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Abstract
The utility model relates to a reverse-connection preventive circuit for a photovoltaic convergence box photovoltaic battery string, belonging to the technical field of photovoltaic power generation, comprising a photovoltaic set string voltage detection circuit, a convergence bus voltage detection circuit, a control circuit and a switching tube driving circuit, wherein when the voltage of a photovoltaic set string is higher than the voltage of a convergence bus, the control circuit controls a driving circuit to switch on a switching tube VTn, and the switching tube VTn works in a synchronous rectification mode. Through using the switching tube VTn with a parasitic body diode, the parasitic body diode has the advantage of being lower in forward voltage drop under the synchronous rectification mode, thereby effectively reducing the forward conductive loss of the diode, and increasing the total efficiency of the photovoltaic convergence box.
Description
Technical field
The utility model relates to the photovoltaic power generation technology field, particularly a kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit.
Background technology
In photovoltaic generating system, photovoltaic combiner box plays the key effect that compiles multichannel photovoltaic electric current.
The photovoltaic combiner box of prior art generally adopts diode as the anti-backflow device of photovoltaic group string, the shortcoming of this mode is, the forward direction conduction voltage drop of diode is large, when photovoltaic group crosstalk stream is larger, the power consumption that produces is also very large, needs to adopt radiator guarantee the diode trouble free service, when particularly every road photovoltaic group string all adopts diode as the anti-backflow device of photovoltaic group string, the loss that produces is larger, has reduced the whole efficiency of photovoltaic combiner box.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and a kind of high efficiency photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit is provided.
Provide a kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit for this reason, comprise photovoltaic group crosstalk pressure testing circuit, the bus rod voltage detecting circuit, control circuit and switch tube driving circuit, also comprise the switching tube VTn with parasitic body diode, switching tube VTn is serially connected in the anodal loop or negative loop of photovoltaic group string, the crosstalk of photovoltaic group is pressed testing circuit to detect the crosstalk of photovoltaic group and is pressed, while bus rod voltage detecting circuit bus rod voltage, the size that is compared photovoltaic group crosstalk pressure and bus rod voltage by control circuit: when photovoltaic group crosstalk pressure was higher than bus rod voltage, control circuit control drive circuit made switching tube VTn conducting; When the crosstalk of photovoltaic group was forced down in bus rod voltage, control circuit control drive circuit cut out switching tube VTn, prevents that bus rod is to photovoltaic group string reverse irrigated current.
Wherein, switching tube VTn is any one in MOSFET pipe, IGBT pipe or the SCR pipe.
Wherein, switching tube VTn has a plurality of parallel connections.
The beneficial effect of a kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit of the present utility model is, comprise photovoltaic group crosstalk pressure testing circuit, the bus rod voltage detecting circuit, control circuit and switch tube driving circuit, when photovoltaic group crosstalk pressure is higher than bus rod voltage, control circuit control drive circuit makes switching tube VTn conducting, switching tube VTn works in the synchronous rectification mode, by the switching tube VTn of utilization with parasitic body diode, lower characteristics fall in the forward voltage that its parasitic body diode works under the synchronous rectification mode, effectively reduce the forward conduction loss of diode, improved the whole efficiency of photovoltaic combiner box.
Description of drawings
Fig. 1 is a kind of circuit diagram of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit.
Include among the figure:
1---testing circuit is pressed in the crosstalk of photovoltaic group;
2---the bus rod voltage detecting circuit;
3---control circuit;
4---switch tube driving circuit.
Embodiment
A kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit of present embodiment as shown in Figure 1, comprise photovoltaic group crosstalk pressure testing circuit 1, bus rod voltage detecting circuit 2, control circuit 3 and switch tube driving circuit 4, also comprise the switching tube VTn with parasitic body diode, switching tube VTn is serially connected in the anodal loop of photovoltaic group string, the crosstalk of photovoltaic group is pressed testing circuit 1 to detect the crosstalk of photovoltaic group and is pressed, while bus rod voltage detecting circuit 2 bus rod voltages, the size that is compared photovoltaic group crosstalk pressure and bus rod voltage by control circuit 3: when photovoltaic group crosstalk pressure is higher than bus rod voltage, control circuit 3 control drive circuits make switching tube VTn conducting, and switching tube VTn works in the synchronous rectification mode; When the crosstalk of photovoltaic group was forced down in bus rod voltage, control circuit 3 control drive circuits cut out switching tube VTn, prevent that bus rod is to photovoltaic group string reverse irrigated current.
Concrete, the positive pole of photovoltaic group string is connected source electrode and is connected with switching tube VTn, and the drain electrode of switching tube VTn is connected positive pole and is connected with bus rod, and the negative pole of photovoltaic group string is connected negative pole and is connected with bus rod.
The crosstalk of photovoltaic group presses the first end of testing circuit 1 to be connected positive pole with photovoltaic group string to connect, and the crosstalk of photovoltaic group presses the second end of testing circuit 1 to be connected negative pole with photovoltaic group string to connect, and the crosstalk of photovoltaic group presses the output of testing circuit 1 to be connected with control unit.
The first end of bus rod voltage detecting circuit 2 is connected positive pole and is connected with bus rod, the second end of bus rod voltage detecting circuit 2 is connected negative pole and is connected with bus rod, and the output of bus rod voltage detecting circuit 2 is connected with control unit.
The grid of switching tube VTn is connected output and is connected with drive circuit, the input of drive circuit is connected with control unit.
A kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit of the present utility model, when photovoltaic group crosstalk pressure is higher than bus rod voltage, control circuit 3 control drive circuits make switching tube VTn conducting, switching tube VTn works in the synchronous rectification mode, by the switching tube VTn of utilization with parasitic body diode, lower characteristics fall in the forward voltage that its parasitic body diode works under the synchronous rectification mode, have effectively reduced the forward conduction loss of diode, have improved the whole efficiency of photovoltaic combiner box.
Wherein, switching tube VTn is any one in MOSFET pipe, IGBT pipe or the SCR pipe.
Wherein, switching tube VTn has a plurality of parallel connections.
A kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit of present embodiment, other structure is identical with embodiment 1, and difference is: switching tube VTn is serially connected in the negative loop of photovoltaic group string.
Should be noted that at last; above embodiment only is used for the explanation the technical solution of the utility model but not to the restriction of the utility model protection range; although with reference to preferred embodiment the utility model has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.
Claims (3)
1. photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit, comprise photovoltaic group crosstalk pressure testing circuit, the bus rod voltage detecting circuit, control circuit and switch tube driving circuit, it is characterized in that, also comprise the switching tube VTn with parasitic body diode, switching tube VTn is serially connected in the anodal loop or negative loop of photovoltaic group string, the crosstalk of photovoltaic group is pressed testing circuit to detect the crosstalk of photovoltaic group and is pressed, while bus rod voltage detecting circuit bus rod voltage, the size that is compared photovoltaic group crosstalk pressure and bus rod voltage by control circuit: when photovoltaic group crosstalk pressure was higher than bus rod voltage, control circuit control drive circuit made switching tube VTn conducting; When the crosstalk of photovoltaic group was forced down in bus rod voltage, control circuit control drive circuit cut out switching tube VTn, prevents that bus rod is to photovoltaic group string reverse irrigated current.
2. a kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit according to claim 1 is characterized in that, switching tube VTn is any one in MOSFET pipe, IGBT pipe or the SCR pipe.
3. a kind of photovoltaic combiner box photovoltaic cell string reverse-connection preventing circuit according to claim 1 is characterized in that switching tube VTn has a plurality of parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220562634 CN202872363U (en) | 2012-10-30 | 2012-10-30 | Reverse-connection preventive circuit for photovoltaic convergence box photovoltaic battery string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220562634 CN202872363U (en) | 2012-10-30 | 2012-10-30 | Reverse-connection preventive circuit for photovoltaic convergence box photovoltaic battery string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872363U true CN202872363U (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220562634 Expired - Lifetime CN202872363U (en) | 2012-10-30 | 2012-10-30 | Reverse-connection preventive circuit for photovoltaic convergence box photovoltaic battery string |
Country Status (1)
| Country | Link |
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| CN (1) | CN202872363U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953554A (en) * | 2014-03-31 | 2015-09-30 | Ls产电株式会社 | Protection system against reverse battery connection |
| CN105977952A (en) * | 2016-06-16 | 2016-09-28 | 阳光电源股份有限公司 | Anti-reverse connection protection circuit |
| CN107733028A (en) * | 2017-10-30 | 2018-02-23 | 深圳硕日新能源科技有限公司 | A kind of anti-reverse apparatus and system of solar panels |
| CN109478780A (en) * | 2016-08-02 | 2019-03-15 | 大陆汽车有限责任公司 | Circuit is protected in reversal |
| CN117117811A (en) * | 2023-10-19 | 2023-11-24 | 新源智储能源发展(北京)有限公司 | Reverse connection preventing device of battery energy storage system and control method |
-
2012
- 2012-10-30 CN CN 201220562634 patent/CN202872363U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953554A (en) * | 2014-03-31 | 2015-09-30 | Ls产电株式会社 | Protection system against reverse battery connection |
| CN105977952A (en) * | 2016-06-16 | 2016-09-28 | 阳光电源股份有限公司 | Anti-reverse connection protection circuit |
| CN105977952B (en) * | 2016-06-16 | 2019-08-13 | 阳光电源股份有限公司 | A kind of reverse connection prevention protection circuit |
| CN109478780A (en) * | 2016-08-02 | 2019-03-15 | 大陆汽车有限责任公司 | Circuit is protected in reversal |
| CN109478780B (en) * | 2016-08-02 | 2020-08-04 | 大陆汽车有限责任公司 | Polarity conversion protection circuit |
| US11411397B2 (en) | 2016-08-02 | 2022-08-09 | Continental Automotive Gmbh | Polarity reversal protection circuit |
| CN107733028A (en) * | 2017-10-30 | 2018-02-23 | 深圳硕日新能源科技有限公司 | A kind of anti-reverse apparatus and system of solar panels |
| CN117117811A (en) * | 2023-10-19 | 2023-11-24 | 新源智储能源发展(北京)有限公司 | Reverse connection preventing device of battery energy storage system and control method |
| CN117117811B (en) * | 2023-10-19 | 2024-01-05 | 新源智储能源发展(北京)有限公司 | Reverse connection preventing device of battery energy storage system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523808 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee after: EAST GROUP Co.,Ltd. Address before: 523808 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee before: GUANGDONG EAST POWER Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180604 Address after: 030000 Shui Xiu Industrial Park, Shui Xiu Township, Taigu County, Jinzhong, Shanxi Patentee after: Shanxi Jinlu EAST new energy Co.,Ltd. Address before: 523808 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee before: EAST GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180927 Address after: 523000 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee after: EAST GROUP Co.,Ltd. Address before: 030000 Shui Xiu Industrial Park, Shui Xiu Township, Taigu County, Jinzhong, Shanxi Patentee before: Shanxi Jinlu EAST new energy Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |