CN105720912A - Novel solar photovoltaic module junction box - Google Patents
Novel solar photovoltaic module junction box Download PDFInfo
- Publication number
- CN105720912A CN105720912A CN201610282892.8A CN201610282892A CN105720912A CN 105720912 A CN105720912 A CN 105720912A CN 201610282892 A CN201610282892 A CN 201610282892A CN 105720912 A CN105720912 A CN 105720912A
- Authority
- CN
- China
- Prior art keywords
- link
- cable
- busbar
- junction box
- electrical switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
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- 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 invention discloses a novel solar photovoltaic module junction box. The junction box comprises a box body, wherein a printed circuit board (PCB) is arranged in the box body; N-numbered bus bar connecting ends and two cable connecting ends are printed on the PCB; each bus bar connecting end is connected with a solar cell array in series by a bus bar; the adjacent bus bar connecting ends are also connected by a diode; an electronic switch is connected between the first bus bar connecting end and the first cable connecting end in series; on-off of the electronic switch is controlled by a received control signal; the N<th> bus bar connecting end is connected with the second cable connecting end; the two cable connecting ends are respectively connected with the outside by cables; and a bypass capacitor is also arranged between the two cable connecting ends. The junction box can be used for artificially or automatically reducing the voltage in a power station system to a safety range when accidents happen, thus being favourable for timely carrying out site disposal.
Description
Technical field
The invention belongs to solar photovoltaic technology field, particularly relate to a kind of solar energy photovoltaic assembly junction box.
Background technology
In solar energy power generating field, rosette is a kind of very important accessory, and for the electrical connection of photovoltaic module, voltage produced by solar battery group string needs after rosette is cumulative, by inverter, unidirectional current is converted to alternating current again, is then incorporated into electrical network.In prior art, the structure of rosette generally comprises box body, is provided with some conducting strips in box body, connects solar battery group string each via busbar；It is connected with diode between each adjacent conductive sheet；The conducting strip at two ends is respectively connected with the external world with cable.Multiple rosettees are connected, and are added up by the voltage that set of cells string produces.Existing rosette is not switched off function, and when namely physical connection does not turn off, electrical connection also exists all the time, and voltage is at a relatively high；If voltage produced by single battery group string is 30V, after 14 groups are connected, voltage then can reach 420V.So when power station something unexpected happened, such as fire, earthquake, owing to system still having high voltage, rescue personnel will be hindered to rescue in time.
Summary of the invention
It is an object of the invention to provide a kind of solar energy photovoltaic assembly junction box, can power-off in time when needed.
For this, the technical solution used in the present invention is such that a kind of solar energy photovoltaic assembly junction box, including box body, it is characterized in that: in box body, be provided with printed substrate, printed substrate is printed with N number of busbar link and two cable links, each busbar link is connected with solar battery group string by busbar, is also connected with diode between each adjacent busbar link；Wherein be in series with electrical switch between the first busbar link and the first cable link, electrical switch by the control signal received to control its break-make；N busbar link and the second cable link are connected；Two cable links are connected with the external world respectively by cable；It is additionally provided with shunt capacitance between two cable links.
The logic of described electrical switch is: the switch OFF when no signal, switch conduction when having a signal.
Busbar link, diode, cable link, shunt capacitance, electrical switch collectively form the main circuit of rosette, also being in series with amplifier circuit between corresponding busbar link and cable link, the outfan of amplifier circuit is connected with electrical switch.
Busbar link, diode, cable link, shunt capacitance, electrical switch collectively form the main circuit of rosette, are also parallel with amplifier circuit between two cable links, and the outfan of amplifier circuit is connected with electrical switch.
It can be seen from the foregoing description that the first busbar link and the first cable link have corresponding relation, become one group；N busbar link and the second cable link have corresponding relation, become one group.In general they lay respectively at the both sides of printed substrate, become negative or positive electrode.When amplifier circuit connected in series enters main circuit, having mode two kinds possible, one is an electrical switch of connecting between the first busbar link and the first cable link, amplifier circuit of connecting between N busbar link and the second cable link；Another kind is that connect between the first busbar link and a first cable link electrical switch and amplifier circuit, N busbar link and the second cable link is joined directly together.
The effect of amplifier circuit is acquisition controlling signal, and this control signal can be present in the carrier signal in loop, it is also possible to be wireless signal, is transferred to electrical switch after then being amplified.
Electrical switch has two kinds of alternative logics, is namely defaulted as on-off.As logical in being defaulted as, then switch conduction during no signal, switch OFF when having a signal；As disconnected in being defaulted as, then switch OFF during no signal, switch conduction when having a signal.The present invention is preferably defaulted as disconnected scheme, because when something unexpected happened, control signal can be lost, and rosette will automatically shut down, and is so more beneficial for realizing the goal of the invention of " under the state of emergency timely power-off ".
Electrical switch in the present invention, it is necessary to extra power supply circuits, and by between electronic switching device busbar link and cable link at negative pole, it is possible to share a ground connection with rosette itself, relative to device on positive pole, provide cost savings.The shunt capacitance set between cable link has very important effect, in an initial condition, owing to electrical switch default conditions are for turning off, loop can not be formed between each rosette, control signal cannot arrive each rosette thus starting whole system, therefore, the design of shunt capacitance makes system to start shooting smoothly in an initial condition.Simultaneously because shunt capacitance cannot conducting direct current electricity, therefore, when the set of cells string of some rosette or its connection breaks down and can not work, the loop of whole group of solar junction box is interrupted, the power of power plant substantially reduces, so that staff can perceive and there is rosette or set of cells string breaks down, it is possible to be replaced maintenance in time, it is to avoid the waste of solar energy resources.
It can be seen from the foregoing description that technical scheme, it is possible at the time of emergency, manually or automatically voltage in electric power station system is down to safety range, thus being conducive to carrying out in time site disposal.
Accompanying drawing explanation
It is described in further detail below in conjunction with accompanying drawing and embodiments of the present invention
Fig. 1 is the block diagram of rosette place electric power station system；
Fig. 2 is the circuit diagram of rosette；
Fig. 3 is the main circuit diagram A of rosette；
Fig. 4 is the amplifier circuit diagram B of rosette；
Fig. 5 is the driving output circuit C of rosette；
Fig. 6 is the power supply circuits D of rosette；
Fig. 7 is the artificial circuit figure of control signal generator.
Figure is labeled as: busbar link 1, diode 2, negative electricity cable connection end 31, positive electrical cable connection end 32, electrical switch 4, shunt capacitance 5.
S1, S2, S3, S4, S5 in Fig. 2 ~ 6 is link, and the two ends of identical label are connected；
P1, P2, P3, P4, P5, P6 in Fig. 7 is link, and the two ends of identical label are connected.
Detailed description of the invention
Rosette described in the present embodiment, including box body, is provided with printed substrate in box body, printed substrate is printed with N number of busbar link 1 and cable link, and cable link is divided into negative electricity cable connection end 31 and positive electrical cable connection end 32；Each busbar link 1 is connected with solar battery group string by busbar, is also connected with diode 2 between each adjacent busbar link 1；Wherein be in series with electrical switch 4 between the first busbar link and negative electricity cable connection end 31, electrical switch 4 by the control signal received to control its break-make；N busbar link is connected with positive electrical cable connection end 32；Two cable links are connected with the external world respectively by cable.It is additionally provided with shunt capacitance 5 between two cable links；Busbar link 1, diode 2, cable link, shunt capacitance 5, electrical switch 4 collectively form the main circuit of rosette, also connecting or bridge in S1, S2 place between corresponding busbar link and cable link has amplifier circuit, and the outfan of amplifier circuit is connected with electrical switch 4.
Solar power plant system described in the present embodiment, including some solar battery group strings, is one group by rosette series connection, by inverter, unidirectional current is converted to alternating current after produced voltage accumulation, at least part of with electrical switch 4 in described rosette；Electric power station system has a control signal generator, controls the break-make of electrical switch in rosette by control signal.Control signal generator can access loop by serial or parallel connection mode, and produced control signal can by wired mode, i.e. cable transmission extremely each rosette, can also be wirelessly, i.e. WIFI, radio frequency, bluetooths etc., produce wireless signal, send to each rosette.
During the present embodiment work, the control signal sent by control signal generator controls rosette, starting stage, many Battery packs sheet and rosette normal power supply；When there are special circumstances, control signal generator sends reverse signal, and the electrical switch of junction box disconnects；Owing to a control signal controls multiple rosette simultaneously, therefore control signal generator sends reverse signal, the electrical switch of multiple junction box all can disconnect, thus the series connection disconnected between solar battery sheet, the voltage existed in electric power station system is made to be voltage produced by single Battery pack sheet, voltage in electric power station system is down to safety range, thus being conducive to carrying out in time site disposal.
Claims (5)
1. a solar energy photovoltaic assembly junction box, including box body, it is characterized in that: in box body, be provided with printed substrate, printed substrate is printed with N number of busbar link and two cable links, each busbar link is connected with solar battery group string by busbar, is also connected with diode between each adjacent busbar link；Wherein be in series with electrical switch between the first busbar link and the first cable link, electrical switch by the control signal received to control its break-make；N busbar link and the second cable link are connected；Two cable links are connected with the external world respectively by cable；It is additionally provided with shunt capacitance between two cable links.
2. solar energy photovoltaic assembly junction box as claimed in claim 1 a kind of, it is characterised in that: the logic of described electrical switch is: the switch OFF when no signal, switch conduction when having a signal.
3. a kind of solar energy photovoltaic assembly junction box as claimed in claim 2, it is characterized in that: busbar link, diode, cable link, shunt capacitance, electrical switch collectively form the main circuit of rosette, also being in series with amplifier circuit between corresponding busbar link and cable link, the outfan of amplifier circuit is connected with electrical switch.
4. a kind of solar energy photovoltaic assembly junction box as claimed in claim 2, it is characterized in that: busbar link, diode, cable link, shunt capacitance, electrical switch collectively form the main circuit of rosette, also being parallel with amplifier circuit between two cable links, the outfan of amplifier circuit is connected with electrical switch.
5. a kind of solar energy photovoltaic assembly junction box as described in any one of claim 1-4, it is characterised in that: the busbar link of negative pole is the first busbar link, and the cable link of negative pole is the first cable link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610282892.8A CN105720912A (en) | 2016-05-03 | 2016-05-03 | Novel solar photovoltaic module junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610282892.8A CN105720912A (en) | 2016-05-03 | 2016-05-03 | Novel solar photovoltaic module junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105720912A true CN105720912A (en) | 2016-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610282892.8A Pending CN105720912A (en) | 2016-05-03 | 2016-05-03 | Novel solar photovoltaic module junction box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904240A (en) * | 2019-02-26 | 2019-06-18 | 江苏禾木传感技术有限公司 | Integrated intelligence photovoltaic module structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120199172A1 (en) * | 2010-03-15 | 2012-08-09 | Tigo Energy, Inc. | Systems and Methods to Provide Enhanced Diode Bypass Paths |
| CN103733509A (en) * | 2011-08-19 | 2014-04-16 | 菲尼克斯电气公司 | Socket for a solar panel with a protective circuit |
| CN103782513A (en) * | 2011-06-29 | 2014-05-07 | 埃苏茨乌克有限责任公司 | Photovoltaic module |
| WO2014186389A1 (en) * | 2013-05-14 | 2014-11-20 | Navsemi Energy Pte. Ltd. | Single-stage solar-photovoltaic power conversion circuitry |
| JP2015106882A (en) * | 2013-12-02 | 2015-06-08 | 河村電器産業株式会社 | Backflow prevention circuit and connection box for photovoltaic power generation |
| CN205584125U (en) * | 2016-05-03 | 2016-09-14 | 闪耀魅力有限公司 | Novel solar PV modules terminal box |
-
2016
- 2016-05-03 CN CN201610282892.8A patent/CN105720912A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120199172A1 (en) * | 2010-03-15 | 2012-08-09 | Tigo Energy, Inc. | Systems and Methods to Provide Enhanced Diode Bypass Paths |
| CN103782513A (en) * | 2011-06-29 | 2014-05-07 | 埃苏茨乌克有限责任公司 | Photovoltaic module |
| CN103733509A (en) * | 2011-08-19 | 2014-04-16 | 菲尼克斯电气公司 | Socket for a solar panel with a protective circuit |
| WO2014186389A1 (en) * | 2013-05-14 | 2014-11-20 | Navsemi Energy Pte. Ltd. | Single-stage solar-photovoltaic power conversion circuitry |
| JP2015106882A (en) * | 2013-12-02 | 2015-06-08 | 河村電器産業株式会社 | Backflow prevention circuit and connection box for photovoltaic power generation |
| CN205584125U (en) * | 2016-05-03 | 2016-09-14 | 闪耀魅力有限公司 | Novel solar PV modules terminal box |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904240A (en) * | 2019-02-26 | 2019-06-18 | 江苏禾木传感技术有限公司 | Integrated intelligence photovoltaic module structure |
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Application publication date: 20160629 |