CN216671662U - Jumper for reducing forward voltage drop of photovoltaic module - Google Patents
Jumper for reducing forward voltage drop of photovoltaic module Download PDFInfo
- Publication number
- CN216671662U CN216671662U CN202123306943.1U CN202123306943U CN216671662U CN 216671662 U CN216671662 U CN 216671662U CN 202123306943 U CN202123306943 U CN 202123306943U CN 216671662 U CN216671662 U CN 216671662U
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- Prior art keywords
- horizontal section
- jumper
- voltage drop
- welding
- forward voltage
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- 238000003466 welding Methods 0.000 claims abstract description 39
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- 239000010949 copper Substances 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 23
- 238000005476 soldering Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 10
- 238000010248 power generation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012799 electrically-conductive coating Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
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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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to the technical field of photovoltaic module assembly processing, in particular to a jumper wire for reducing the forward voltage drop of a photovoltaic module, which comprises a first horizontal section, a second horizontal section and a third horizontal section, wherein a first inclined end is arranged between the first horizontal section and the second horizontal section, a second inclined end is arranged between the second horizontal section and the third horizontal section, a transverse groove is arranged at the bottom of the lower side of the second inclined section, the second horizontal section is higher than the first horizontal section and the third horizontal section, the third horizontal section is higher than the first horizontal section, the third horizontal section is welded with a chip by conductive paste, the first horizontal section is welded with a copper sheet by conductive paste, a welding boss is arranged at the center of the welding position of the third horizontal section and the chip in a downward protruding manner, jumper wire sawteeth are arranged at the welding position of the welding surface of the first horizontal section, the contact area is improved, and the forward voltage drop is obviously reduced, reduce power consumption and generate heat, promoted life.
Description
Technical Field
The utility model relates to the technical field of photovoltaic module assembly processing, in particular to a jumper wire for reducing the forward voltage drop of a photovoltaic module.
Background
Photovoltaic (photo voltaic) is a short name for Solar Photovoltaic power generation systems (Solar power systems), is a novel power generation system which directly converts Solar radiation energy into electric energy by utilizing the Photovoltaic effect of a Solar cell semiconductor material, and has two modes of independent operation and grid-connected operation. With the continuous development of photovoltaic power generation technology, photovoltaic modules are gradually applied to various fields of social life and are favored by users. The solar photovoltaic cell is a photoelectric conversion device made by utilizing semiconductor photovoltaic effect, and can be used as a power supply and a photoelectric detection device. The solar cell module is often installed outdoors or in a place far away from the open city, the solar cell module is difficult to avoid falling on a shelter in the long-term use process, the shades form partial shadows on the solar cell modules, the solar cell modules in the series branches under the partial shadows are taken as loads, and the energy generated by other solar cell modules is consumed, thereby generating heat to cause local temperature rise and form a hot spot effect which can melt welding spots on the battery component and destroy grid lines when serious, in order to prevent the solar cell from being damaged due to the "hot spot effect", a bypass diode module is connected in parallel between the positive electrode and the negative electrode of the solar cell module in practical operation, at least one bypass diode is present in the module to prevent the energy generated by the illuminating elements from being dissipated by the shielded elements.
Under the condition that a solar cell normally illuminates, the photovoltaic bypass diode is cut off in the reverse direction, no effect is generated on a circuit, when an abnormally working cell exists in a cell group or the cell cannot generate power due to the hot spot effect, the current of the whole circuit is determined by the cell with the minimum current, the current is determined by the shielding area of the cell, if the reverse bias voltage is higher than the minimum voltage of the cell, the bypass diode is conducted, at the moment, the abnormally working cell is short-circuited, the photovoltaic bypass diode plays a bypass role, the current generated by other cells flows out of the photovoltaic bypass diode, the solar power generation system continues to generate power, and the condition that the power generation circuit cannot be conducted due to the problem of one cell is avoided. General bypass diode selection principle: 1) the withstand voltage capacity is two times of the maximum reverse working voltage, 2) the current capacity is two times of the maximum reverse working current, 3) the junction temperature is higher than the actual junction temperature, 4) the thermal resistance is small, and 5) the voltage drop is small.
The forward voltage drop of the existing partial bypass diode is large, and the external heat dissipation effect is poor, so that the bypass diode is easy to damage, and the voltage drop of the bypass diode needs to be reduced. Aiming at the problem, the cross section area can be increased, the material is changed, namely, the resistivity is reduced, the contact part is coated with conductive paste, namely, the contact resistance is reduced, if high-frequency alternating current is transmitted, the conducting wire is changed into a plurality of strands, each strand is thinner and better, namely, the influence caused by the skin effect is reduced, and the like; meanwhile, in the packaging process, soldering tin is required to be melted through high temperature, and the jumper wire is welded with the chip, and in the existing jumper wire design, when the soldering tin amount is large, the soldering tin can climb along the copper jumper wire due to better wettability of the soldering tin and the copper jumper wire, so that tin gathering occurs at a bending part, and the soldering tin can shrink when being cooled, so that the stretching effect is achieved on the surface of the chip; affecting the chip.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of defects and defects in the prior art, the utility model provides the jumper wire for reducing the forward voltage drop of the photovoltaic module, which has the advantages of large welding area, contact area improvement, obvious forward voltage drop reduction, power consumption and heating reduction and service life improvement.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a reduce jumper wire of photovoltaic module forward voltage drop, the jumper wire includes first horizontal segment, second horizontal segment and third horizontal segment, be provided with first tip between first horizontal segment and the second horizontal segment, be provided with the second tip between second horizontal segment and the third horizontal segment, second tip downside bottom is provided with horizontal groove, the second horizontal segment is higher than first horizontal segment and third horizontal segment, the third horizontal segment is higher than first horizontal segment, the third horizontal segment is with electrically conductive coating paste and chip welding, first horizontal segment is with electrically conductive coating paste and copper sheet welding, third horizontal segment and chip welding center downward protrusion are equipped with the welding boss, first horizontal segment face of weld welding junction is provided with the jumper wire sawtooth, be provided with two circular through-holes on the second horizontal segment symmetrically.
Furthermore, the jumper wire is made of copper.
Furthermore, the conductive coating paste coated on the jumper welding is solder paste.
Furthermore, the surface of the jumper is coated with an insulating coating, and the welding part of the jumper, the copper sheet and the chip is free of the insulating coating.
Furthermore, the width of the jumper is less than one third of the width of the copper sheet, the middle of the welding position of the first horizontal section is rectangular, and the two ends of the welding position are arc-shaped.
Furthermore, circular grooves which are sunken upwards are formed in the periphery of the bottom surface of the third horizontal section.
The utility model has the following beneficial effects: by adopting the scheme, the sheet-shaped conducting wire is used for replacing the original common jumper wire to reduce the resistance value so as to reduce the forward voltage drop of the circuit, the voltage drop problem of the original circuit and the heating problem caused by the voltage drop problem are solved to a certain extent, meanwhile, the sawtooth is arranged on the contact surface of the jumper wire and the copper sheet, the contact area of the jumper wire and the surface of the copper sheet can be greatly increased, compared with plane contact, the contact between the jumper wire and the copper sheet is closer due to integral space contact, the contact area is also enlarged from another angle, the resistance value is reduced so as to reduce the forward voltage drop of the circuit, the conductive tin paste coating is arranged on the contact surface, the contact area is further increased, the contact resistance is reduced, and the forward voltage drop is reduced; in addition, during high-temperature welding, the soldering tin is further melted and flows, and because the welding boss is contacted with the chip, a gap is formed between the periphery of the welding boss and the chip, and the redundant soldering tin is filled in the gap and does not extend to the side face of the chip, so that the phenomenon of tin accumulation is avoided; the transverse groove is formed in the inner side of the third horizontal section, when the soldering tin amount is larger, redundant soldering tin is gathered in the groove and cannot climb upwards, the soldering tin is prevented from gathering at a bent part, stress cannot be generated on a chip, the contact surface of the soldering tin and the chip is enlarged, the chip is effectively protected, and the current resistance of a product is improved; through the arrangement of the through holes, when the epoxy resin is encapsulated, the two circular through holes can better ensure the encapsulation uniformity, and the situation that the lower part of the second horizontal section is not completely encapsulated is avoided; the utility model only replaces the existing jumper wire with the sheet-shaped conducting wire, does not additionally add other devices and circuits, and has simple design and low cost.
Drawings
FIG. 1 is a schematic structural view of the copper sheet of the present invention after being connected thereto;
FIG. 2 is a bottom view of the jumper;
FIG. 3 is a schematic diagram illustrating the completion of the welding of the jumper wire and the copper sheet;
in the figure: 1-jumper, 11-first horizontal segment, 12-second horizontal segment, 121-circular through hole, 13-third horizontal segment, 131-circular groove, 14-first inclined end, 15-second inclined end, 151-transverse groove, 2-welding boss, 3-jumper sawtooth, 4-copper sheet and 5-chip.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 1-2, the jumper 1 includes a first horizontal section 11, a second horizontal section 12 and a third horizontal section 13, a first inclined end 14 is arranged between the first horizontal segment 11 and the second horizontal segment 12, a second inclined end 15 is arranged between the second horizontal segment 12 and the third horizontal segment 13, the bottom of the lower side of the second inclined section 15 is provided with a transverse groove 151, the second horizontal section 12 is higher than the first horizontal section 11 and the third horizontal section 13, the third horizontal section 13 is higher than the first horizontal section 11, the third horizontal section 13 is welded with the chip 5 by conductive paste, the first horizontal section 11 is welded with the copper sheet 4 by conductive coating paste, the center of the welding part of the third horizontal section 13 and the chip 5 is provided with a welding lug boss 2 in a downward protruding way, the welding position of the welding surface of the first horizontal section 11 is provided with jumper saw teeth 3, and the second horizontal section 12 is symmetrically provided with two circular through holes 121.
In the embodiment, the sheet-shaped conducting wire is used for replacing the original common jumper wire to reduce the resistance value so as to reduce the forward voltage drop of the circuit, thereby solving the voltage drop problem of the original circuit and the heating problem caused by the voltage drop problem to a certain extent, and simultaneously, jumper wire saw teeth are arranged on the contact surface of the jumper wire and the copper sheet, and the corresponding saw teeth arranged on the surface of the copper sheet are meshed with the jumper wire saw teeth through demoulding and casting treatment, the contact area between the jumper wire and the surface of the copper sheet can be greatly increased, compared with plane contact, the integral space contact not only ensures that the jumper wire is contacted with the copper sheet more closely, but also enlarges the contact area from another angle, reduces the resistance value, reduces the forward voltage drop of the circuit, the contact surface is provided with the conductive tin paste coating, so that the contact area is further increased, the contact resistance is reduced, and the forward voltage drop is reduced; in addition, during high-temperature welding, the soldering tin is further melted and flows, and because the welding boss is contacted with the chip, gaps are generated between the periphery of the welding boss and the chip, and the redundant soldering tin is filled in the gaps and cannot extend to the side face of the chip, so that the phenomenon of tin accumulation is avoided; the transverse groove is formed in the inner side of the third horizontal section, when the soldering tin amount is larger, redundant soldering tin is gathered in the groove and cannot climb upwards, the soldering tin is prevented from gathering at a bent part, stress cannot be generated on a chip, the contact surface of the soldering tin and the chip is enlarged, the chip is effectively protected, and the current resistance of a product is improved; through the arrangement of the through holes, when the epoxy resin is encapsulated, the two circular through holes can better ensure the encapsulation uniformity, and the situation that the lower part of the second horizontal section is not completely encapsulated is avoided; the utility model only replaces the existing jumper wire with the sheet-shaped conducting wire, does not additionally add other devices and circuits, and has simple design and low cost.
Illustratively, the jumper wire 1 is made of copper; the material with better conductive effect is replaced, and the resistivity is reduced.
Illustratively, the conductive paste applied to the jumper wire 1 by welding is solder paste; the conductive effect is good, and the gap is filled, so that the contact resistance is reduced.
Illustratively, the surface of the jumper wire 1 is coated with an insulating coating, and the welding part of the jumper wire with the copper sheet and the chip is not provided with the insulating coating.
Illustratively, the width of the jumper wire 1 is less than one third of the width of the copper sheet 4, the middle of the welding position of the first horizontal section 11 is rectangular, and the two ends of the welding position are arc-shaped; the subsequent finished product needs enough positions to wrap epoxy resin around to encapsulate the finished product, and two arc-shaped contact surfaces are added on the basis to further increase the contact area and reduce the contact resistance.
Illustratively, a circular groove 131 which is concave upwards is formed around the bottom surface of the third horizontal section; the gap around the welding boss is increased, and the phenomenon of tin gathering is avoided.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a reduce jumper wire of photovoltaic module forward voltage drop which characterized in that: the jumper wire comprises a first horizontal section, a second horizontal section and a third horizontal section, a first inclined end is arranged between the first horizontal section and the second horizontal section, a second inclined end is arranged between the second horizontal section and the third horizontal section, a transverse groove is formed in the bottom of the lower side of the second inclined section, the second horizontal section is higher than the first horizontal section and the third horizontal section, the third horizontal section is higher than the first horizontal section, the third horizontal section is welded with a chip by using conductive paste, the first horizontal section is welded with a copper sheet by using conductive paste, a welding boss is arranged in the center of the welding position of the third horizontal section and the chip in a downward protruding mode, jumper wire saw teeth are arranged at the welding position of the welding surface of the first horizontal section, and two circular through holes are symmetrically formed in the second horizontal section.
2. The jumper capable of reducing the forward voltage drop of the photovoltaic module according to claim 1, wherein: the jumper is made of copper.
3. The jumper capable of reducing the forward voltage drop of the photovoltaic module according to claim 1, wherein: the conducting coating paste coated on the jumper welding is solder paste.
4. The jumper capable of reducing the forward voltage drop of the photovoltaic module according to claim 1, wherein: the surface of the jumper is coated with an insulating coating, and the welding part of the jumper, the copper sheet and the chip is free of the insulating coating.
5. The jumper capable of reducing the forward voltage drop of the photovoltaic module according to claim 1, wherein: the width of the jumper is less than one third of the width of the copper sheet, the middle of the welding position of the first horizontal section is rectangular, and the two ends of the welding position of the first horizontal section are arc-shaped.
6. The jumper capable of reducing the forward voltage drop of the photovoltaic module according to claim 1, wherein: and circular grooves which are sunken upwards are formed in the periphery of the bottom surface of the third horizontal section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123306943.1U CN216671662U (en) | 2021-12-27 | 2021-12-27 | Jumper for reducing forward voltage drop of photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123306943.1U CN216671662U (en) | 2021-12-27 | 2021-12-27 | Jumper for reducing forward voltage drop of photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216671662U true CN216671662U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123306943.1U Active CN216671662U (en) | 2021-12-27 | 2021-12-27 | Jumper for reducing forward voltage drop of photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216671662U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024103946A1 (en) * | 2022-11-18 | 2024-05-23 | 隆基绿能科技股份有限公司 | Jumper and photovoltaic module |
-
2021
- 2021-12-27 CN CN202123306943.1U patent/CN216671662U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024103946A1 (en) * | 2022-11-18 | 2024-05-23 | 隆基绿能科技股份有限公司 | Jumper and photovoltaic module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 247100 No. 2, Shuanglong Road, economic and Technological Development Zone, Chizhou City, Anhui Province Patentee after: Anhui Juxin Semiconductor Technology Co.,Ltd. Country or region after: China Address before: 247100 No. 2, Shuanglong Road, economic and Technological Development Zone, Chizhou City, Anhui Province Patentee before: ANHUI JUXIN SEMICONDUCTOR TECHNOLOGY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |