CN102916056B - Solar module protective circuit, solar junction box and solar power system - Google Patents
Solar module protective circuit, solar junction box and solar power system Download PDFInfo
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- CN102916056B CN102916056B CN201210359806.0A CN201210359806A CN102916056B CN 102916056 B CN102916056 B CN 102916056B CN 201210359806 A CN201210359806 A CN 201210359806A CN 102916056 B CN102916056 B CN 102916056B
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- solar
- bypass diode
- electronic switch
- protective circuit
- junction box
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- 230000001681 protective effect Effects 0.000 title claims abstract description 25
- 230000005669 field effect Effects 0.000 claims description 15
- 230000005678 Seebeck effect Effects 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- 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
Abstract
The present invention relates to solar energy generation technology, particularly solar module protective circuit, solar junction box and solar power system.The present invention is achieved by the following technical programs: a kind of solar module protective circuit; the bypass diode that the solar battery sheet group reversed polarity comprised and be made up of the cell piece be connected in series is in parallel, also comprise be parallel to described bypass diode electronic switch, be thermally coupled in bypass diode and the thermoelectric generator of described electronic switch can be turned off at another design temperature at electronic switch described in design temperature conducting.It effectively can limit the temperature rise of bypass diode, reduces the power consumption of protective circuit.
Description
Technical field
The present invention relates to solar energy generation technology, particularly solar module protective circuit, solar junction box and solar power system.
Background technology
The problems of excessive heat of the bypass diode in the existing battery component invented as being connected in series by cell piece proposes a kind of unidirectional bypass protection circuit, as United States Patent (USP) 7898114, bypass protection principle disclosed in this patent can see Fig. 1, a string cell piece be connected in series, bridge the bypass diode BD of the pole reversal, the control circuit of bypass diode BD is in parallel electronic switching device T1 and the described electronic switch of manipulation; Therefore, when cell piece one or more in cell piece string is blocked, hinder electric current and flow through all the other normal cell pieces in cell piece string, now, forward biased bypass diode BD provides a forward voltage drop VF, 0.6V is about for this forward voltage drop of silicon device, is enough to make Low threshold switch T2 conducting, and by charge pump circuit, capacitor C is charged; And the electric charge on capacitor C is used to unlocking electronic switch T1 and enters conducting state, the power consumption on unlocking electronic switch T1 and bypass diode BD is distributed, and the low on-resistance of electronic switch T1 makes the electric current flowing through bypass diode BD reduce thus reduce power consumption; When capacitor C discharge off, electronic switch T1 reenters off state, and above-mentioned charging process restarts; This power consumption periodically between bypass diode BD and electronic switch T1 is distributed, and is conducive to the programming rate slowing down bypass diode BD; But the forward voltage drop VF of bypass diode can reduce along with the temperature rise of bypass diode, can be decreased to 0.3V from 0.6V; even lower; thus cause the cycle of electronic switch T1 conducting and shutoff elongated, be unfavorable for the temperature rise reducing bypass diode, make protective circuit power consumption higher.
Summary of the invention
An object of the present invention is to provide a kind of solar module protective circuit, and it effectively can limit the temperature rise of bypass diode, reduces the power consumption of protective circuit.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of solar module protective circuit; the bypass diode that the solar battery sheet group reversed polarity comprised and be made up of the cell piece be connected in series is in parallel, also comprise be parallel to described bypass diode electronic switch, be thermally coupled in bypass diode and the thermoelectric generator of described electronic switch can be turned off at another design temperature at electronic switch described in design temperature conducting.
When there being cell piece to be blocked, bypass diode conducting, along with uprising of bypass diode temperature rise, when the set temperature is reached, because thermoelectric generator is thermally coupled in bypass diode, thermoelectric generator is made to produce enough electromotive forces, thus drive electronic switch conducting, and then the power consumption between unlocking electronic switch and bypass diode is distributed, thus reduce the power consumption of bypass diode, the temperature rise of bypass diode is reduced, when the temperature rise of bypass diode is reduced to another design temperature, because thermoelectric generator is thermally coupled in bypass diode, the electromotive force that thermoelectric generator produces has been not enough to conduct electrons switch, thus electronic switch is turned off, but when the temperature rise of bypass diode again reach thermoelectric generator can be made to produce make the design temperature of the electromotive force of electronic switch conducting time, electronic switch is conducting again, and then the power consumption between periodic unlocking electronic switch and bypass diode is distributed, thus effectively limit the temperature rise of bypass diode, reduce the power consumption of bypass circuit, improve the reliability of protective circuit, and then be also conducive to protecting solar module.
Preferred as technique scheme, described thermoelectric generator is Seebeck effect device.
Preferred as technique scheme, described electronic switch is field effect transistor.
Thermoelectric generator is connected with the gate pole of field effect transistor.
Another object of the present invention is to provide a kind of solar junction box; there is the binding post for being electrically connected with solar module, this kind of solar junction box inside comprise preceding solution solar module protective circuit bypass diode, be parallel to described bypass diode electronic switch, be thermally coupled in bypass diode and the thermoelectric generator of described electronic switch can be turned off at another design temperature at electronic switch described in design temperature conducting.
Because involved solar module protective circuit effectively limit the temperature rise of bypass diode, therefore, be conducive to the temperature rise of restriction terminal box, improve the reliability of terminal box.
Preferred as technique scheme, thermoelectric generator is Seebeck effect device.
Preferred as technique scheme, described electronic switch is field effect transistor.
Thermoelectric generator is connected with the gate pole of field effect transistor.
Another object more of the present invention is to provide a kind of solar power system, comprises the solar module protective circuit as described in preceding solution.
Another object more of the present invention is to provide a kind of solar power system, comprises the solar junction box as described in preceding solution.
In sum, the present invention has following beneficial effect: structure of the present invention is simple, and effectively can limit the temperature rise of bypass diode, makes the temperature rise of bypass diode be in below uniform temperature all the time, thus reduce the power consumption of protective circuit, improve the reliability of protective circuit; Also improve the reliability of solar junction box and solar power system simultaneously, and be conducive to the overall power reducing solar power system.
Accompanying drawing explanation
Fig. 1 is background technology protective circuit schematic diagram;
Fig. 2 is embodiment 1 protective circuit schematic diagram.
In figure, 1, cell piece, 2, bypass diode, 3, electronic switch, 4, thermoelectric generator.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this specification, as long as but be all subject to the protection of Patent Law in right of the present invention.
Embodiment 1: a kind of solar module protective circuit; as shown in Figure 2, comprise the bypass diode 2 in parallel with the solar battery sheet group reversed polarity be made up of the cell piece 1 be connected in series, be parallel to the electronic switch 3 of described bypass diode 2, be thermally coupled in bypass diode 2 and the thermoelectric generator 4 of described electronic switch 3 can be turned off at another design temperature at electronic switch 3 described in design temperature conducting.
Thermoelectric generator 4 is Seebeck effect device; Electronic switch 3 is field effect transistor; Seebeck effect device is connected with the gate pole of field effect transistor.
When there being cell piece to be blocked, bypass diode 2 conducting, along with uprising of bypass diode 2 temperature rise, when the set temperature is reached, because Seebeck effect device is thermally coupled in bypass diode 2, Seebeck effect device is made to produce enough electromotive forces, thus drive field effect transistor conducting, and then the power consumption of opening between field effect transistor and bypass diode 2 is distributed, thus reduce the power consumption of bypass diode 2, the temperature rise of bypass diode 2 is reduced, when the temperature rise of bypass diode 2 is reduced to another design temperature, because Seebeck effect device is thermally coupled in bypass diode 2, the electromotive force that Seebeck effect device produces has been not enough to conducting field effect transistor, thus field effect transistor is turned off, but when the temperature rise of bypass diode 2 again reach Seebeck effect device can be made to produce make the design temperature of the electromotive force of field effect transistor conducting time, the conducting again of Seebeck effect device, and then periodically the power consumption of opening between field effect transistor and bypass diode 2 is distributed, thus effectively limits the temperature rise of bypass diode 2, reduces the power consumption of bypass circuit, improves the reliability of protective circuit, and then be also conducive to protecting solar module.
Embodiment 2: a kind of solar junction box, there is the binding post for being electrically connected with solar module, described solar junction box inside have embodiment 1 solar module protective circuit bypass diode 2, be parallel to described bypass diode 2 electronic switch 3, be thermally coupled in bypass diode 2 and the thermoelectric generator 4 of described electronic switch 3 can be turned off at another design temperature at electronic switch 3 described in design temperature conducting; Thermoelectric generator 4 is Seebeck effect device; Electronic switch 3 is field effect transistor; Seebeck effect device is connected with the gate pole of field effect transistor.
Embodiment 3: a kind of solar power system, comprises embodiment 1 solar module protective circuit.
Embodiment 4: a kind of solar power system, comprises embodiment 2 solar junction box.
Claims (4)
1. a solar module protective circuit, comprise the bypass diode (2) in parallel with the solar battery sheet group reversed polarity be made up of the cell piece be connected in series (1), it is characterized in that, also comprise be parallel to described bypass diode (2) electronic switch (3), be thermally coupled in bypass diode (2) and the thermoelectric generator (4) of described electronic switch (3) can be turned off at another design temperature at electronic switch (3) described in design temperature conducting;
Described thermoelectric generator (4) is Seebeck effect device;
Described electronic switch (3) is field effect transistor.
2. a solar junction box; there is the binding post for being electrically connected with solar module; it is characterized in that, described solar junction box inside comprise solar module protective circuit as claimed in claim 1 bypass diode (2), be parallel to described bypass diode (2) electronic switch (3), be thermally coupled in bypass diode (2) and the thermoelectric generator (4) of described electronic switch (3) can be turned off at another design temperature at electronic switch (3) described in design temperature conducting.
3. a solar power system, is characterized in that, comprises solar module protective circuit as claimed in claim 1.
4. a solar power system, is characterized in that, comprises solar junction box as claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359806.0A CN102916056B (en) | 2012-09-25 | 2012-09-25 | Solar module protective circuit, solar junction box and solar power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359806.0A CN102916056B (en) | 2012-09-25 | 2012-09-25 | Solar module protective circuit, solar junction box and solar power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102916056A CN102916056A (en) | 2013-02-06 |
| CN102916056B true CN102916056B (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210359806.0A Active CN102916056B (en) | 2012-09-25 | 2012-09-25 | Solar module protective circuit, solar junction box and solar power system |
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| Country | Link |
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| CN (1) | CN102916056B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560159B (en) * | 2013-11-06 | 2016-08-24 | 无锡清莲新能源科技有限公司 | Protection circuit for photovoltaic cell group |
| CN103560160B (en) * | 2013-11-06 | 2016-03-23 | 无锡清莲新能源科技有限公司 | Solar module |
| US10076969B2 (en) * | 2015-07-02 | 2018-09-18 | Johnson Controls Technology Company | Battery systems and methods for bi-directional current control |
| CN106655727B (en) * | 2017-02-07 | 2023-11-10 | 苏州锴威特半导体股份有限公司 | Device and method for reducing power consumption of solar bypass switch circuit |
| CN108111121A (en) * | 2017-12-14 | 2018-06-01 | 常州星海电子股份有限公司 | A kind of photovoltaic bypass diode |
| CN110962525B (en) * | 2018-09-30 | 2021-10-22 | 广东威灵汽车部件有限公司 | Electric automobile, compressor and control method and device of compressor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996873Y (en) * | 2006-12-08 | 2007-12-26 | 深圳市和而泰电子科技有限公司 | Output-controllable thermal-coupling circuit |
| CN202840492U (en) * | 2012-09-25 | 2013-03-27 | 谢可勋 | Solar cell module protection circuit, solar junction box and solar power generation system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005175370A (en) * | 2003-12-15 | 2005-06-30 | Oonanba Kk | Terminal box for solar cell panel |
| JP2006165227A (en) * | 2004-11-15 | 2006-06-22 | Oonanba Kk | Terminal box for solar panel |
| DE102005036153B4 (en) * | 2005-05-24 | 2007-03-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Protection switching device for a solar module |
| CN201854208U (en) * | 2010-04-06 | 2011-06-01 | 鸿富锦精密工业（深圳）有限公司 | Temperature control junction box and photovoltaic power generating system using same |
-
2012
- 2012-09-25 CN CN201210359806.0A patent/CN102916056B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996873Y (en) * | 2006-12-08 | 2007-12-26 | 深圳市和而泰电子科技有限公司 | Output-controllable thermal-coupling circuit |
| CN202840492U (en) * | 2012-09-25 | 2013-03-27 | 谢可勋 | Solar cell module protection circuit, solar junction box and solar power generation system |
Also Published As
| Publication number | Publication date |
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| CN102916056A (en) | 2013-02-06 |
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Address after: 313000 Zhejiang City, Huzhou Province, the town of Wuxing District, the town of standard factory building 2, building 1, eight Co-patentee after: ZHEJIANG MJ TECHNOLOGYCO.,LTD. Patentee after: Xie Kexun Address before: 313000 Zhejiang City, Huzhou Province, the town of Wuxing District, the town of standard factory building 2, building 1, eight Co-patentee before: ZHEJIANG MEIJING TECHNOLOGY Co.,Ltd. Patentee before: Xie Kexun |
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Effective date of registration: 20190904 Address after: 233000 Room 1402, Ziyang Building, Pearl Plaza, Huaishang District, Bengbu City, Anhui Province Patentee after: Bengbu HRABERO Intellectual Property Service Co.,Ltd. Address before: 313000 Zhejiang City, Huzhou Province, the town of Wuxing District, the town of standard factory building 2, building 1, eight Co-patentee before: ZHEJIANG MJ TECHNOLOGYCO.,LTD. Patentee before: Xie Kexun |
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Effective date of registration: 20191226 Address after: No. 217, Kaifa West Road, Hanjiang Economic Development Zone, Yangzhou City, Jiangsu Province Patentee after: YANGZHOU QIAOHENG ELECTRONICS Co.,Ltd. Address before: 233000 Room 1402, Ziyang Building, Pearl Plaza, Huaishang District, Bengbu City, Anhui Province Patentee before: Bengbu HRABERO Intellectual Property Service Co.,Ltd. |
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Effective date of registration: 20231124 Address after: Room 203, Building E9, Jinrong Science and Technology Park, No. 158 Ji'an South Road, Yangzhou High tech Industrial Development Zone, Yangzhou City, Jiangsu Province, 225128 Patentee after: Yangzhou Tuomao New Energy High tech Co.,Ltd. Address before: 225800 no.217, Kaifa West Road, Hanjiang Economic Development Zone, Yangzhou City, Jiangsu Province Patentee before: YANGZHOU QIAOHENG ELECTRONICS Co.,Ltd. |