CN202050372U - Junction box - Google Patents
Junction box Download PDFInfo
- Publication number
- CN202050372U CN202050372U CN2011201271021U CN201120127102U CN202050372U CN 202050372 U CN202050372 U CN 202050372U CN 2011201271021 U CN2011201271021 U CN 2011201271021U CN 201120127102 U CN201120127102 U CN 201120127102U CN 202050372 U CN202050372 U CN 202050372U
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- CN
- China
- Prior art keywords
- bypass diode
- photocell
- bypass
- terminal box
- adjacent
- 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.)
- Expired - Fee Related
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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
Disclosed is a junction box. The junction box is arranged in a solar module and connected with a plurality of photoelectric cell units which are in serial connection, and comprises a first bypass diode cluster and at least one second bypass diode. The first bypass diode cluster comprises a plurality of first bypass diodes which are in serial connection in the same direction, and the first bypass diodes are in parallel connection with the photoelectric cell units in one-to-one correspondence and are used for being conducted when the corresponding photoelectric cell units are abnormal so as to bypass the corresponding photoelectric cell units. The second bypass diodes are in parallel connection with at least two adjacent photoelectric cell units and used for being conducted when the at least two adjacent photoelectric cell units are abnormal so as to bypass the at least two adjacent photoelectric cell units. When the adjacent two or more photoelectric cell units are abnormal simultaneously, the second bypass diode is conducted instead of the multiple first bypass diodes which are in parallel connection with the adjacent two or more photoelectric cell units, and thereby amount of conducted diodes is reduced, conduction loss of the bypass diodes can be effectively reduced and temperature in the junction box is lowered.
Description
Technical field
The utility model relates to solar energy system, particularly a kind of terminal box.
Background technology
In solar electric power supply system, usually earlier several photocell groups are connected into the solar energy module of certain voltage, again with the series connection of several solar energy modules, and the solar energy module after will connecting delivers to converter via dc bus, is converted to alternating current and powers.The other bypass diode in parallel of each photocell group in the solar energy module is used for conducting when crested of photocell group or damage, the electric current of other photocell group can be passed through, thereby the electric current of solar energy module is derived.Yet, if a plurality of photocell groups are unusual in the solar energy module, a plurality of bypass diode conductings being arranged, this will cause than lossy.
The utility model content
In view of this, need provide a kind of terminal box, have less bypass diode conduction loss.
A kind of terminal box is positioned in the solar energy module, is connected with the photocell group of a plurality of series connection.Described terminal box comprises the first bypass diode string and at least one second bypass diode.The first bypass diode string comprises first bypass diode of a plurality of series aiding connections, and described first bypass diode and described photocell group are corresponding one by one in parallel, is respectively applied for conducting when unusual of photocell group in correspondence, with the photocell group of the described correspondence of bypass.Described at least one second bypass diode is in parallel with at least two adjacent photocell groups, is used for conducting when described at least two adjacent photocell groups are unusual simultaneously, described at least two the adjacent unusual photocell groups of bypass.
Preferably, described first bypass diode is different with described second bypass diode.
Preferably, also comprise two interfaces, connect the two ends of the described first bypass diode string, be used to export the electric current that described photocell group produces.
Preferably, described interface comprises positive interface and negative interface, described positive interface connects the negative electrode of the described first bypass diode string, be used to export the positive current that described photocell group produces, described negative interface connects the anode of the described first bypass diode string, is used to export the negative current that described photocell group produces.
Above-mentioned terminal box is extra at least one second bypass diode in parallel on adjacent two or more photocell groups, so, when adjacent two or more photocell groups are unusual simultaneously, second bypass diode of a parallel connection replaces a plurality of first bypass diode conductings in parallel with adjacent two or more photocell groups, reduced the quantity of conducting diode, can effectively reduce the conduction loss of bypass diode, thereby can effectively reduce the temperature in part and the terminal box, avoid the too high unsafe problems such as casing deformation be full of cracks that causes of Yin Wendu to produce, prolong product useful life.
Description of drawings
Fig. 1 is the schematic diagram of solar energy module in the utility model one execution mode;
Fig. 2 is the schematic diagram of terminal box in the utility model first execution mode;
Fig. 3 is the schematic diagram of terminal box in the utility model second execution mode;
Fig. 4 is the schematic diagram of terminal box in the utility model the 3rd execution mode; And
Fig. 5 is the schematic diagram of terminal box in the utility model the 4th execution mode.
The main element symbol description
Photocell group 20
Photocell 200
The first bypass diode string 310
The first bypass diode D1
The second bypass diode D2
Following embodiment will further specify the utility model in conjunction with above-mentioned accompanying drawing.
Embodiment
Fig. 1 is the schematic diagram of solar energy module 10 in the utility model one execution mode.In the present embodiment, solar energy module (solar panel) 10 comprises the photocell group (solar cell string) 20 (among Fig. 1 be that example describe with three) and the terminal box 30 of a plurality of series connection.Each photocell group 20 comprises the photocell (solar cell) 200 of a plurality of series connection, and being used for solar energy converting is direct current.Terminal box 30 is used to connect the photocell group 20 of a plurality of series connection, and the direct current that these photocell groups 20 produce is exported.Terminal box 30 comprises two interfaces 300,301, is used to export the direct current that photocell group 20 produces.In the present embodiment, terminal box 30 links to each other with the two ends of each photocell group 20, for example, solar energy module 10 comprises the photocell group 20 of two series connection, then terminal box 30 connects an end that is not connected of the photocell group 20 of two series connection respectively via two cables, connects an end that is connected of the photocell group 20 of two series connection via a cable.If solar energy module 10 comprises the photocell group 20 of three series connection, then terminal box 30 is via the photocell group 20 of three series connection of four cables connections, and the rest may be inferred, and terminal box 30 links to each other via the photocell group 20 of n+1 bar cable with n series connection.
Fig. 2 is the schematic diagram of terminal box 30 in the utility model first execution mode.In the present embodiment, terminal box 30 comprises the first bypass diode string 310, at least one second bypass diode D2 and two interfaces 300,301.The first bypass diode string 310 comprises the first bypass diode D1 of a plurality of series aiding connections.The share the same light quantity of battery pack 20 of the quantity of the first bypass diode D1 is identical, and share the same light battery pack 20 one by one correspondence be connected in parallel, be used for conducting when unusual of photocell group 20 in correspondence, with the photocell group 20 of bypass correspondence.In the present embodiment, the negative electrode of the first bypass diode D1 links to each other with the positive pole of the photocell group 20 that is connected in parallel, and anode links to each other with the negative pole of the photocell group 20 that is connected in parallel.When photocell group 20 just often, the cathode voltage of the first bypass diode D1 can conducting greater than anode voltage.When one of them photocell group 20 goes wrong, the anode of the Dui Ying first bypass diode D1 connects the positive pole of next photocell group 20 with it, negative electrode connects the negative pole of a photocell group 20, thereby keep the conducting of whole circuit, make that the direct current of all the other photocell groups 20 is still exportable.
The second bypass diode D2 is in parallel with at least two adjacent photocell groups 20, is used for conducting when described at least two adjacent photocell groups 20 are unusual simultaneously, described at least two the adjacent unusual photocell groups 20 of bypass.When described at least two adjacent photocell groups 20 are unusual simultaneously, the second bypass diode D2 conducting, the first bypass diode D1 then not conducting in parallel with described at least two adjacent unusual photocell groups 20.So, the path of all the other the normal photocell groups 20 and second bypass diode D2 composition is exported electric current from terminal box 30.Therefore, when photocell group adjacent more than two groups 20 is unusual simultaneously, the second bypass diode D2 of a parallel connection replaces a plurality of first bypass diode D1 conductings, reduced the quantity of conducting diode, can effectively reduce the conduction loss of bypass diode, thereby can effectively reduce the temperature in part and the terminal box 30, avoid the too high unsafe problems such as casing deformation be full of cracks that causes of Yin Wendu to produce, prolong product useful life.
Two interfaces 300,301 are connected to the two ends of the first bypass diode string 310 respectively, are used to export the direct current that photocell group 20 produces.One that wherein links to each other with the cathode terminal of the first bypass diode string 310 is positive interface, the positive current that output photocell group 20 produces, and of linking to each other with the anode tap of the first bypass diode string 310 is negative interface, the negative current that output photocell group 20 produces.In other words, positive interface 300 links to each other with the positive pole of first photocell group 20, and negative interface 301 links to each other with the negative pole of last photocell group 20.
Suppose that the photocell group 20 that links to each other with positive interface 300 is first photocell group 20, the photocell group 20 that links to each other with negative interface 301 is last photocell group 20.In the present embodiment, the second bypass diode D2 is in parallel with second and third photocell group 20.
In the present embodiment, the first bypass diode D1 is different with the second bypass diode D2, for example characteristic (model) difference.
Fig. 3 is to the schematic diagram that is respectively terminal box 31,32,33 in the utility model second to the 4th execution mode shown in Figure 5, they with Fig. 2 in the difference of terminal box 30 only be that the annexation of the second bypass diode D2 is different.The second bypass diode D2 of the terminal box 31 among Fig. 3 is in parallel with first and second photocell group 20.The second bypass diode D2 of the terminal box 32 among Fig. 4 is in parallel with first to the 3rd photocell group 20.Terminal box 33 among Fig. 5 comprises two second bypass diode D2, and one second bypass diode D2 is in parallel with first and second photocell group 20, and another second bypass diode D2 is in parallel with first to the 3rd photocell group 20.
Terminal box of the present utility model on adjacent two or more photocell groups 20, for example 3 or 5, extra in parallel at least one second bypass diode D2.So, when adjacent two or more photocell groups 20 are unusual simultaneously, the second bypass diode D2 of a parallel connection replaces a plurality of first bypass diode D1 conductings in parallel with adjacent two or more photocell groups 20, reduced the quantity of conducting diode, can effectively reduce the conduction loss of bypass diode, thereby can effectively reduce the temperature in part and the terminal box, avoid the too high unsafe problems such as casing deformation be full of cracks that causes of Yin Wendu to produce, prolong product useful life.
Claims (4)
1. a terminal box is positioned in the solar energy module, is connected with the photocell group of a plurality of series connection, it is characterized in that described terminal box comprises:
The first bypass diode string comprises first bypass diode of a plurality of series aiding connections, and described first bypass diode and described photocell group are corresponding one by one in parallel, is respectively applied for conducting when unusual of photocell group in correspondence, with the photocell group of the described correspondence of bypass; And
At least one second bypass diode, in parallel with at least two adjacent photocell groups, be used for conducting when described at least two adjacent photocell groups are unusual simultaneously, with described at least two the adjacent unusual photocell groups of bypass.
2. terminal box as claimed in claim 1 is characterized in that, described first bypass diode is different with described second bypass diode.
3. terminal box as claimed in claim 1 or 2 is characterized in that, also comprises two interfaces, connects the two ends of the described first bypass diode string, is used to export the electric current that described photocell group produces.
4. terminal box as claimed in claim 3, it is characterized in that, described interface comprises positive interface and negative interface, described positive interface connects the negative electrode of the described first bypass diode string, be used to export the positive current that described photocell group produces, described negative interface connects the anode of the described first bypass diode string, is used to export the negative current that described photocell group produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201271021U CN202050372U (en) | 2011-04-26 | 2011-04-26 | Junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201271021U CN202050372U (en) | 2011-04-26 | 2011-04-26 | Junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202050372U true CN202050372U (en) | 2011-11-23 |
Family
ID=44990663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201271021U Expired - Fee Related CN202050372U (en) | 2011-04-26 | 2011-04-26 | Junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202050372U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761290A (en) * | 2011-04-26 | 2012-10-31 | 国琏电子（上海）有限公司 | Junction box |
| CN102820341A (en) * | 2012-09-11 | 2012-12-12 | 合肥工业大学 | Photovoltaic assembly configured with multilayer bypass diodes |
-
2011
- 2011-04-26 CN CN2011201271021U patent/CN202050372U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761290A (en) * | 2011-04-26 | 2012-10-31 | 国琏电子（上海）有限公司 | Junction box |
| CN102820341A (en) * | 2012-09-11 | 2012-12-12 | 合肥工业大学 | Photovoltaic assembly configured with multilayer bypass diodes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20140426 |