CN214477509U - Multi-cutting large silicon slice high-efficiency photovoltaic module - Google Patents
Multi-cutting large silicon slice high-efficiency photovoltaic module Download PDFInfo
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- CN214477509U CN214477509U CN202120459997.2U CN202120459997U CN214477509U CN 214477509 U CN214477509 U CN 214477509U CN 202120459997 U CN202120459997 U CN 202120459997U CN 214477509 U CN214477509 U CN 214477509U
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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
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Abstract
The utility model discloses a high-efficient photovoltaic module of many big silicon chips of cutting includes first battery cell, second battery cell, vertical jumper wire, busbar, terminal box, horizontal jumper wire and lead wire, first battery cell and second battery cell are established ties through the busbar, vertical jumper wire is located the series connection department of first battery cell and second battery cell, first battery cell and second battery cell all include a plurality of parallelly connected battery strings, and parallelly connected battery string passes through horizontal jumper wire and connects, first battery cell and second battery cell all include forward battery string group and reverse battery string group, and forward battery string group and reverse battery string group symmetric distribution are in the upper and lower both sides of terminal box, and the both ends of vertical jumper wire are connected with the busbar of forward battery string group and reverse battery string group respectively, pass through horizontal jumper wire between forward battery string group and the reverse battery string group and connect, and a junction box is arranged between the forward battery string group and the reverse battery string group of the battery unit.
Description
Technical Field
The utility model relates to a photovoltaic module technical field especially relates to a cut high-efficient photovoltaic module of big silicon chip more.
Background
The solar energy is used as a green new energy, and has the advantages of inexhaustibility, cleanness, environmental protection and the like. The quality and cost of the crystalline silicon solar cell, which is a core part in a solar power generation system, will directly determine the quality and cost of the whole system.
At present, a photovoltaic module with higher efficiency is to cut a certain number of crystalline silicon solar cells into halves and then to be connected in series into a cell panel and to be packaged to form a crystalline silicon photovoltaic module for power generation, the power generation efficiency is improved compared with the series connection of the whole cell panel, in the power generation process, due to the design of the crystalline silicon photovoltaic module, foreign matters, tree shadows and the like can shield partial areas of the cell panel, the voltage of the shielded cell can be biased as a load, the electricity generated by other cells is consumed, the temperature of the cell can be higher than that of other cells, and therefore the hot spot effect is generated. The serious hot spot can lead to the battery to shelter from the district high temperature, causes the battery piece to damage to lead to the battery cluster to open circuit, make battery piece output power reduce by a wide margin, the light loss is great. Among the prior art, thereby there is the bypass diode that connects in parallel to carry out short circuit and reduce the influence, nevertheless because of the difficult bypass diode short circuit that realizes of encapsulation reason, if by the short circuit, the whole string of battery cluster that is sheltered from also can not collect the electric current by whole string, and can cause the condition such as terminal box lead wire more.
Disclosure of Invention
In view of the above, there is a need to provide a high efficiency photovoltaic module with large power, high efficiency and small shielding effect.
A multi-cut large silicon slice high-efficiency photovoltaic component comprises a first battery unit, a second battery unit, a vertical jumper wire, a bus bar, a junction box, a transverse jumper wire and a lead wire, wherein the first battery unit and the second battery unit are connected in series through the bus bar, the vertical jumper wire is positioned at the series connection position of the first battery unit and the second battery unit, the first battery unit and the second battery unit respectively comprise a plurality of battery string groups which are connected in parallel, the battery string groups which are connected in parallel are connected through the transverse jumper wire, the first battery unit and the second battery unit respectively comprise a forward battery string group and a reverse battery string group, the forward battery string group and the reverse battery string group are symmetrically distributed at the upper side and the lower side of the junction box, two ends of the vertical jumper wire are respectively connected with the bus bars of the forward battery string group and the reverse battery string group, the forward battery string group and the reverse battery string group are connected through the transverse jumper wire, the junction box is arranged between the forward battery string group and the reverse battery string group of the battery unit, two leads are led out from the junction box through a transverse jumper wire connected between the forward battery string group and the reverse battery string group, the middle vertical jumper wire and the transverse jumper wire are connected with the two leads through two reverse diodes respectively after being welded in an intersecting manner, one of the two leads in the junction box is an anode, the other lead in the junction box is a cathode, and the two leads are connected through the reverse diodes. Two leads in the junction box are connected with external power transmission equipment to supply power to the outside.
Preferably, the battery string comprises a plurality of battery pieces, and the specification of the battery pieces is one fifth or one sixth of the specification of the whole silicon wafer.
Preferably, the first battery unit comprises 1-3 forward battery string groups and 1-3 reverse battery string groups.
Preferably, the second battery unit comprises 1-3 forward battery string groups and 1-3 reverse battery string groups.
Preferably, 2-6 transverse jumpers are arranged between the battery string groups of the first battery unit.
Preferably, 2-6 transverse jumpers are arranged between the battery string groups of the second battery unit.
Has the advantages that: the utility model discloses a high-efficient photovoltaic module of many big silicon chips of cutting includes first battery cell, second battery cell, vertical jumper wire, busbar, terminal box, horizontal jumper wire and lead wire, first battery cell and second battery cell are established ties through the busbar, vertical jumper wire is located the series connection department of first battery cell and second battery cell, first battery cell and second battery cell all include a plurality of parallelly connected battery strings, and parallelly connected battery string passes through horizontal jumper wire and connects, first battery cell and second battery cell all include forward battery string group and reverse battery string group, and forward battery string group and reverse battery string group symmetric distribution are in the upper and lower both sides of terminal box, and the both ends of vertical jumper wire are connected with the busbar of forward battery string group and reverse battery string group respectively, pass through horizontal jumper wire between forward battery string group and the reverse battery string group and connect, a junction box is arranged between a forward battery string group and a reverse battery string group of a battery unit, two leads are led out from the junction box through a transverse jumper wire connected between the forward battery string group and the reverse battery string group, a middle vertical jumper wire and the transverse jumper wire are connected in an intersecting and welding mode and then are respectively connected with the two leads through two reverse diodes in the junction box, one of the two leads in the junction box is an anode, the other lead in the junction box is a cathode, and the two leads are connected through the reverse diodes. Two leads in the junction box are connected with external power transmission equipment to supply power to the outside. When a certain area of a certain battery string between two transverse jumper wires is shielded, the current generated by other areas of the battery string passes through other battery strings along the transverse jumper wires and finally converges to the junction box, so that the condition of current interruption caused by shielding of the battery string is avoided, and the power generation efficiency of the photovoltaic module is increased.
Drawings
Fig. 1 is the equivalent circuit diagram of the high-efficient photovoltaic module with multiple cut large silicon wafers of the utility model.
Fig. 2 is the utility model discloses a cut big silicon chip high-efficient photovoltaic module's structural schematic more.
Fig. 3 is a partially enlarged view of fig. 2.
Fig. 4 is the equivalent current diagram of the high-efficient photovoltaic module with multiple cut large silicon wafers of the utility model.
Fig. 5 and fig. 6 are equivalent current diagrams when the local part of the high-efficient photovoltaic module with multiple cut large silicon wafers of the present invention is shielded.
Fig. 7 is the connection relationship diagram of the junction box, the vertical jumper and the horizontal jumper of the utility model.
Fig. 8 is another connection relationship diagram of the junction box of the present invention, the vertical jumper and the horizontal jumper.
In the figure: the photovoltaic module comprises a multi-cut large silicon wafer high-efficiency photovoltaic module 10, a first battery unit 20, a forward battery string group 201, a reverse battery string group 202, a second battery unit 30, a vertical jumper 40, a bus bar 50, a junction box 60, a transverse jumper 70, a lead 80, a battery string 100 and a battery piece 101.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1 to 4, the multi-cut large silicon slice high efficiency photovoltaic module 10 includes a first battery unit 20, a second battery unit 30, a vertical jumper wire 40, a bus bar 50, a junction box 60, a horizontal jumper wire 70 and a lead 80, wherein the first battery unit 20 and the second battery unit 30 are connected in series through the bus bar 50, the vertical jumper wire 40 is located at the series connection position of the first battery unit 20 and the second battery unit 30, the first battery unit 20 and the second battery unit 30 each include a plurality of parallel battery strings 100, the parallel battery strings 100 are connected through the horizontal jumper wire 70, the first battery unit 20 and the second battery unit 30 each include a forward battery string group 201 and a reverse battery string group 202, the forward battery string group 201 and the reverse battery string group 202 are symmetrically distributed on the upper and lower sides of the junction box 60, two ends of the vertical jumper wire 40 are respectively connected with the bus bars 50 of the forward battery string group 201 and the reverse battery string group 202, the forward battery string group 201 and the reverse battery string group 202 are connected through a transverse jumper 70, a junction box 60 is arranged between the forward battery string group 201 and the reverse battery string group 202 of the battery unit, the junction box 60 is provided with two leads 80 through the transverse jumper 70 connected between the forward battery string group 201 and the reverse battery string group 202, the middle vertical jumper 40 and the transverse jumper 70 are connected in a crossed welding mode and then are respectively connected with the two leads 80 (A and D) through two reverse diodes in the junction box 60, the two leads 80 (A and D) in the junction box 60 are provided with one lead 80 as an anode and the other lead 80 as a cathode, and the two leads 80 (A and D) are connected through the reverse diodes. Two leads 80 in the junction box 60 are connected with external power transmission equipment to supply power to the outside.
In the traditional photovoltaic module, in order to reduce the influence of sundries, tree shadows and the like on power generation, a short circuit is formed by parallel bypass diodes. The cell sheet may be approximated as a planar product while the diode has a certain volume. The diode cannot be put together with the cell. Diodes are often placed in the junction box. In order to achieve a good effect, a plurality of diodes are often needed for short-circuit, and thus, a plurality of junction boxes need to be arranged, which has an influence on the processing cost and the raw material cost of the photovoltaic module. The utility model discloses a set up vertical wire jumper and horizontal wire jumper, saved the use of diode to processing cost and raw materials cost have been reduced.
Further, the battery string 100 comprises a plurality of battery pieces 101, and the specification of the battery pieces is one fifth or one sixth of the specification of the whole silicon wafer.
Further, the first battery unit 20 includes 1-3 forward battery strings and 1-3 reverse battery strings.
Further, the second battery unit 30 includes 1-3 forward battery strings and 1-3 reverse battery strings.
Further, 2 to 6 transverse jumpers 70 are arranged between the battery strings of the first battery unit 20.
Further, 2-6 transverse jumpers 70 are arranged between the battery string groups of the second battery unit 30.
In a preferred embodiment, the first battery unit 20 comprises six battery strings, i.e. three forward battery strings 201 and three reverse battery strings 202, and each battery string is formed by connecting a plurality of battery strings in series. The positive poles of the six battery strings are connected in parallel on the same transverse jumper wire 70. The forward battery string group 201 is located above the transverse jumper 70, and the reverse battery string group 202 is located below the transverse jumper 70. And a lead 80 (A) is led out from the other end of the transverse jumper wire 70 through the junction box 60, the lead 80 (A) is the anode of the whole photovoltaic module, and the cathodes of the six battery strings are in intersection welding connection with the transverse jumper wire 70 through the vertical jumper wire 40, and then another lead 80 (B) is led out from the other end of the junction box 60. Likewise, the second battery unit 30 includes six battery string groups, i.e., three forward battery string groups 201 and three reverse battery string groups 202. The cathodes of the six battery strings are connected in parallel on the same transverse jumper wire 70. Wherein the reverse battery string 202 group is located above the transverse jumper 70 and the forward battery string 201 group is located below the transverse jumper 70. A lead 80 (D) is led out from the other end of the transverse jumper wire 70 through the junction box 60, namely the lead 80 (D) is used as the negative pole of the whole photovoltaic module, another lead (C) is led out from the other end of the junction box 60 after the positive poles of the six groups of battery strings are in intersection welding connection with the transverse jumper wire 70 through the vertical jumper wire 40, and the two junction boxes 60 are connected through the transverse jumper wire. Thereby connecting the first battery cell 20 and the second battery cell 30 in series. Meanwhile, the vertical jumper wires 40 are arranged at the serial connection position of the first battery unit 20 and the second battery unit 30, so that the situation that other areas cannot work normally when all the forward battery string 201 group or the reverse battery string 202 group of a certain battery unit is shielded or disconnected can be effectively avoided. When all three battery strings 100 on the upper portion of the first battery unit 20 are shielded or disconnected, the upper portion of the second battery unit 30 can be communicated with the three battery strings on the lower portion of the first battery unit 20 through the vertical jumper wires 40, and the normal operation of the upper portion of the second battery unit 30 is not affected.
The plurality of lateral jumper wires 70 are provided in each of the first battery cell 20 and the second battery cell 30. Taking the first battery unit 20 as an example, five transverse jumper wires 70 are provided on six battery string groups connected in parallel. Two of the transverse jumper wires 70 are disposed on the forward cell string set 201, and the other two transverse jumper wires 70 are disposed on the reverse cell string set 202, so that when a cell string 100 downstream of a certain transverse jumper wire 70 is failed or is shaded, the power generated by the cell sheet 101 upstream of the cell string 100 is distributed from the transverse jumper wire 70 to other cell strings 100.
Referring to fig. 5 and 6, when a certain region of a certain battery string 100 of the second battery unit 30 is shielded to become a load, and the current of the battery string 100 flows from bottom to top, due to the action of the transverse jumper wire, the larger the resistance of the parallel circuit is, the smaller the current flows, the resistance of the shielded region is much larger than the resistance of the two adjacent normal battery strings 100 according to the parallel characteristic of the circuit, and most of the current passes through the two adjacent battery strings, thereby reducing the power consumption of the battery string 100. At the same time, the temperature rise of the shielded area is also reduced, thereby reducing the possibility of damage to the battery sheet 101. Similarly, if a portion of the area of two strings 100 is blocked, the current generated upstream of the string 100 will pass through another unblocked string 100.
As shown in fig. 7 and 8, two junction boxes 60 may be provided in the photovoltaic module, or one junction box 60 may be provided. The structure of the two junction boxes 60 and the connection relationship between the two junction boxes and the vertical jumper and the horizontal jumper are shown in fig. 7, each junction box leads out a lead A and a lead D through the horizontal jumper on the first battery unit and the second battery unit, the middle vertical jumper and the horizontal jumper are connected in an intersecting and welding mode, then another lead B and another lead C are led out from the two junction box ends, each junction box is provided with a lead A and a lead D connected with the outside, a reverse diode is arranged in each junction box, and one of the leads A and the leads D of the two junction boxes is a positive pole, and the other lead A and the lead D of the two junction boxes is a negative pole. The structure of a junction box 60 and the connection relationship between the junction box and the vertical jumper wire and the connection relationship between the junction box and the horizontal jumper wire are shown in fig. 8, a lead A and a lead D are respectively led out through the horizontal jumper wires on the first battery unit and the second battery unit, the lead A and the lead D in the junction box are connected with the vertical jumper wire and the horizontal jumper wire in an intersecting and welding mode, then, a reverse diode is respectively connected to the two ends of the lead A and the lead D, one of the lead A and the lead D is a positive electrode, and the other lead A and the lead D are a negative electrode. Two leads A and D of the junction box are connected with external power transmission equipment to supply power to the outside.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a cut high-efficient photovoltaic module of big silicon chip more which characterized in that: the battery pack comprises a first battery unit, a second battery unit, a vertical jumper, a bus bar, a junction box, a transverse jumper and a lead wire, wherein the first battery unit and the second battery unit are connected in series through the bus bar, the vertical jumper is positioned at the series connection position of the first battery unit and the second battery unit, the first battery unit and the second battery unit respectively comprise a plurality of parallel battery strings, the parallel battery strings are connected through the transverse jumper, the first battery unit and the second battery unit respectively comprise a forward battery string group and a reverse battery string group, the forward battery string group and the reverse battery string group are symmetrically distributed on the upper side and the lower side of the junction box, two ends of the vertical jumper are respectively connected with the bus bar of the forward battery string group and the reverse battery string group, the forward battery string group and the reverse battery string group are connected through the transverse jumper, and the junction box is arranged between the forward battery string group and the reverse battery string group, the junction box leads out two leads through a transverse jumper wire connected between the forward battery string group and the reverse battery string group, the middle vertical jumper wire and the transverse jumper wire are respectively connected with the two leads through two reverse diodes after being crossed and welded in the junction box, one of the two leads in the junction box is an anode, the other lead in the junction box is a cathode, the two leads are connected through the reverse diodes, and the two leads in the junction box are connected with external power transmission equipment to supply power to the outside.
2. The multi-slice large wafer high efficiency photovoltaic module of claim 1, wherein: the battery string comprises a plurality of battery pieces, and the specification of the battery pieces is one fifth or one sixth of the specification of the whole silicon chip.
3. The multi-slice large wafer high efficiency photovoltaic module of claim 1, wherein: the first battery unit comprises 1-3 forward battery string groups and 1-3 reverse battery string groups.
4. The multi-slice large wafer high efficiency photovoltaic module of claim 1, wherein: the second battery unit comprises 1-3 forward battery string groups and 1-3 reverse battery string groups.
5. The multi-slice large wafer high efficiency photovoltaic module of claim 1, wherein: and 2-6 transverse jumpers are arranged between the battery string groups of the first battery unit.
6. The multi-slice large wafer high efficiency photovoltaic module of claim 1, wherein: and 2-6 transverse jumpers are arranged between the battery string groups of the second battery unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120459997.2U CN214477509U (en) | 2021-03-03 | 2021-03-03 | Multi-cutting large silicon slice high-efficiency photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120459997.2U CN214477509U (en) | 2021-03-03 | 2021-03-03 | Multi-cutting large silicon slice high-efficiency photovoltaic module |
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| Publication Number | Publication Date |
|---|---|
| CN214477509U true CN214477509U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120459997.2U Active CN214477509U (en) | 2021-03-03 | 2021-03-03 | Multi-cutting large silicon slice high-efficiency photovoltaic module |
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| CN (1) | CN214477509U (en) |
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- 2021-03-03 CN CN202120459997.2U patent/CN214477509U/en active Active
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Address after: 750011 No.6, baohu West Road, Jinfeng Industrial Park, Jingkai District, Yinchuan City, Ningxia Hui Autonomous Region Patentee after: Ningxia Xiaoniu Automation Equipment Co.,Ltd. Address before: 750011 No.6, baohu West Road, Jinfeng Industrial Park, Jingkai District, Yinchuan City, Ningxia Hui Autonomous Region Patentee before: NINGXIA XN AUTOMATION EQUIPMENT Co.,Ltd. |
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