CN113765478A - Junction box, photovoltaic module and photovoltaic module manufacturing method - Google Patents
Junction box, photovoltaic module and photovoltaic module manufacturing method Download PDFInfo
- Publication number
- CN113765478A CN113765478A CN202110976181.1A CN202110976181A CN113765478A CN 113765478 A CN113765478 A CN 113765478A CN 202110976181 A CN202110976181 A CN 202110976181A CN 113765478 A CN113765478 A CN 113765478A
- Authority
- CN
- China
- Prior art keywords
- lead
- pads
- pad group
- bonding
- junction box
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims description 47
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 8
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 abstract description 8
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 abstract description 8
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 abstract description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 7
- WABPQHHGFIMREM-VENIDDJXSA-N lead-201 Chemical compound [201Pb] WABPQHHGFIMREM-VENIDDJXSA-N 0.000 description 26
- WABPQHHGFIMREM-FTXFMUIASA-N lead-202 Chemical compound [202Pb] WABPQHHGFIMREM-FTXFMUIASA-N 0.000 description 19
- 239000002313 adhesive film Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000005476 soldering Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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 invention provides a junction box, a photovoltaic module and a manufacturing method of the photovoltaic module, and relates to the technical field of photovoltaics. The junction box comprises a box body, a first bonding pad group and a second bonding pad group, wherein a first lead hole and a second lead hole are formed in the box body, the first bonding pad group and the second bonding pad group respectively comprise a plurality of bonding pads, under the condition that the first lead and the second lead are led into the box body, the bonding pads in the first bonding pad group are welded with the first lead, and the bonding pads in the second bonding pad group are welded with the second lead. Through setting up a plurality of pads, make the lead wire among the photovoltaic module can form a plurality of welding points through a plurality of pads, when certain welding point rosin joint, can realize normal connection through other welding points to can solve because of the rosin joint problem leads to the higher problem of photovoltaic module fault rate.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a junction box, a photovoltaic module and a manufacturing method of the photovoltaic module.
Background
The photovoltaic power generation has the advantages of low cost, no pollution and the like, and has wide application prospect compared with other types of power generation modes. The quality of the photovoltaic module determines the power generation efficiency and the power generation cost of the photovoltaic module, and the application and the popularization of the photovoltaic module are also influenced.
The photovoltaic module is generally provided with a junction box, and a welding pad is arranged in the junction box and is used for connecting a lead in the photovoltaic module so as to lead out current generated by the photovoltaic module. In the welding process of the bonding pad and the lead, the problem of insufficient soldering often occurs, so that the failure rate of the photovoltaic module is high.
Disclosure of Invention
The invention provides a junction box, a photovoltaic module and a manufacturing method of the photovoltaic module, and aims to solve the problem that the failure rate of the photovoltaic module is high due to insufficient soldering between a bonding pad and a lead in the photovoltaic module.
In a first aspect, an embodiment of the present application provides a junction box, including: the box body, the first pad group and the second pad group;
the box body is provided with a first lead hole and a second lead hole, the first lead hole is used for leading in a first lead included by the photovoltaic module, and the second lead hole is used for leading in a second lead included by the photovoltaic module;
the first pad group and the second pad group respectively comprise a plurality of pads, and the pads are arranged on the substrate in the box body at intervals and are connected with each other;
under the condition that the first lead and the second lead are introduced into the case, a plurality of pads in the first pad group are welded with the first lead, and a plurality of pads in the second pad group are welded with the second lead.
Optionally, the first lead and the second lead each have a plurality of lead heads;
a plurality of bonding pads in the first bonding pad group are used for being welded with a plurality of lead heads of the first lead; the plurality of bonding pads in the second bonding pad group are used for being welded with the plurality of lead heads of the second lead.
Optionally, a plurality of pads in the first pad group are arranged at intervals in a first region on the substrate, and the first lead hole is opened in the first region;
and a plurality of bonding pads in the second bonding pad group are arranged in a second area on the substrate at intervals, and the second lead hole is arranged in the second area.
Optionally, the first region and the second region are adjacent and a baffle is disposed between the first region and the second region.
Optionally, in the first region, the pads in the first pad group are arranged in two rows, and the first lead hole is opened between two rows of pads in the first region;
in the second region, the plurality of pads in the second pad group are arranged in two rows, and the second lead hole is opened between the two rows of pads in the second region.
Optionally, in the first region and the second region, one pad is disposed in each column of pads.
Optionally, the first lead hole is composed of a plurality of adjacent first sub-lead holes, each of which is used for leading in a lead head of the first lead;
the second lead hole is composed of a plurality of adjacent second sub-lead holes, and each second sub-lead hole is used for leading in a lead head of the second lead.
Optionally, the device further comprises a diode, a first conducting sheet and a second conducting sheet;
a plurality of bonding pads in the first bonding pad group are respectively connected with the first end of the diode through the first conducting sheet;
and a plurality of bonding pads in the second bonding pad group are respectively connected with the second end of the diode through the second conducting sheet.
Optionally, the cartridge comprises the base, and a sidewall disposed around the base;
the first conducting sheet comprises a first connecting part and a first reinforcing part which are mutually connected; the first connecting part is arranged on the substrate to connect the diode and the bonding pad in the first bonding pad group; the first reinforcing part is arranged along the side wall and extends a first preset distance in the direction back to the substrate;
the second conducting sheet comprises a second connecting part and a second reinforcing part which are mutually connected; the second connecting part is arranged on the substrate to connect the diode and the bonding pad in the second bonding pad group; the second reinforcing part is arranged along the side wall and extends a second preset distance in the direction back to the substrate.
In a second aspect, embodiments of the present application provide a photovoltaic module, including the junction box as described above.
In a third aspect, an embodiment of the present application provides a method for manufacturing a photovoltaic module, including:
mounting a junction box on the assembled photovoltaic module; the photovoltaic module has a first lead and a second lead;
introducing the first lead into a junction box through a first lead hole and introducing the second lead into the junction box through a second lead hole; the first lead hole and the second lead hole are formed in the box body of the junction box;
bonding the first lead to a plurality of pads in a first pad group, and bonding the second lead to a plurality of pads in a second pad group; the multiple bonding pads in the first bonding pad group are arranged on the substrate in the box body at intervals and are connected with each other, and the multiple bonding pads in the second bonding pad group are arranged on the substrate in the junction box at intervals and are connected with each other.
Optionally, before the bonding the first lead to the plurality of pads in the first pad group and the bonding the second lead to the plurality of pads in the second pad group, the method further includes:
cutting a portion of the first lead for introduction into the junction box into a plurality of lead heads, and cutting a portion of the second lead for introduction into the junction box into a plurality of lead heads;
the bonding the first lead to a plurality of pads in a first pad group and the bonding the second lead to a plurality of pads in a second pad group, comprising: and welding the plurality of bonding pads in the first bonding pad group by using the plurality of lead heads of the first lead, and welding the plurality of bonding pads in the second bonding pad group by using the plurality of lead heads of the second lead.
In the embodiment of the application, the junction box comprises a box body, a first bonding pad group and a second bonding pad group, wherein a first lead hole and a second lead hole are formed in the box body, the first lead hole is used for leading in a first lead included in a photovoltaic module, and the second lead hole is used for leading in a second lead included in the photovoltaic module; the first pad group and the second pad group respectively comprise a plurality of pads, and the pads are arranged on the substrate in the box body at intervals and are connected with each other; under the condition that the first lead and the second lead are introduced into the box body, the plurality of bonding pads in the first bonding pad group are welded with the first lead, and the plurality of bonding pads in the second bonding pad group are welded with the second lead. Through setting up a plurality of pads, make the lead wire among the photovoltaic module can form a plurality of welding points through a plurality of pads, when certain welding point rosin joint, can realize normal connection through other welding points to can solve because of the rosin joint problem leads to the higher problem of photovoltaic module fault rate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only 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 inventive labor.
Fig. 1 is an isometric view of a junction box provided by an embodiment of the present application;
fig. 2 illustrates an isometric view of a photovoltaic module provided by an embodiment of the present application;
FIG. 3 shows a schematic diagram of a pair of leads at position A in FIG. 2;
FIG. 4 shows a close-up view of the location A in FIG. 2;
FIG. 5 illustrates an isometric view of another junction box provided by an embodiment of the present application;
FIG. 6 illustrates an isometric view of yet another junction box provided by an embodiment of the present application;
fig. 7 shows a flow chart of steps of a method for manufacturing a photovoltaic module according to an embodiment of the present application.
Description of reference numerals:
101-substrate, 102-sidewall, 200-photovoltaic module, 201-first lead, 2011-lead, 2012-lead, 202-second lead, 2021-lead, 2022-lead, 301-pad, 302-pad, 303-pad, 304-pad, 401-first lead hole, 402-second lead hole, 501-diode, 502-first connection, 503-first stiffener, 504-second connection, 505-second stiffener, 600-baffle.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an isometric view of a junction box provided by an embodiment of the present application is shown, and the junction box includes a box body, a first pad group and a second pad group.
The photovoltaic module comprises a box body, a first lead hole and a second lead hole, wherein the box body is provided with the first lead hole and the second lead hole; the first pad group and the second pad group respectively comprise a plurality of pads, and the pads are arranged on the substrate in the box body at intervals and are connected with each other; under the condition that the first lead and the second lead are introduced into the box body, the plurality of bonding pads in the first bonding pad group are welded with the first lead, and the plurality of bonding pads in the second bonding pad group are welded with the second lead.
In this embodiment, the box body of the junction box includes a base 101 and a side wall 102, and a box cover (not shown), the base 101 is used for mounting the device, the side wall 102 is disposed around the edge of the base 101, and the box cover can be fastened on the side wall 102 to form a cavity for accommodating the device. The specific structure of the junction box can be set according to the requirement, and the embodiment does not limit the structure.
The first bonding pad group and the second bonding pad group form a pair of bonding pads for connecting a pair of leads, namely a first lead and a second lead, in the photovoltaic module where the junction box is located. The photovoltaic module comprises battery pieces, interconnection bars, bus bars, a cover plate, a back plate, a frame and the like, wherein the interconnection bars are used for serially connecting the battery pieces into a battery string, one end of each interconnection bar is a positive electrode, and the other end of each interconnection bar is a negative electrode. In all the battery strings included in the photovoltaic module, a plurality of battery strings form a group, the cathodes of all the interconnection bars in a group of battery strings are connected with a bus bar, the bus bar is a cathode bus bar, the anodes of all the interconnection bars in the group of battery strings are connected with another bus bar, the bus bar is an anode bus bar, one end of the anode bus bar and one end of the cathode bus bar in a group of battery strings are respectively led out of the photovoltaic module, and the current generated by a group of battery strings is led out of the photovoltaic module. As shown in fig. 2 and fig. 3, fig. 2 is an isometric view of a photovoltaic module provided by an embodiment of the present application, and fig. 3 is a schematic structural view of a pair of leads at a position a in fig. 2, one end of a bus bar led out of the photovoltaic module 200 constitutes a lead of the bus bar, and a lead of a positive bus bar and a lead of a negative bus bar constitute a pair of leads of the photovoltaic module 200. In the pair of leads, the lead of the positive electrode bus bar may be defined as the first lead 201, and the lead of the negative electrode bus bar may be defined as the second lead 202, or the lead of the negative electrode bus bar may be defined as the first lead, and the lead of the positive electrode bus bar may be defined as the second lead. To avoid confusion, the embodiment takes the lead of the positive electrode bus bar as the first lead, and the lead of the negative electrode bus bar as the second lead for illustration. It should be noted that, when the cell string included in the photovoltaic module is divided into a plurality of groups, a plurality of pairs of bus bars may be provided in the photovoltaic module, and a plurality of pairs of lead wires may be led out.
In this embodiment, the junction box is installed on the one side of the photovoltaic module where the leads are located, one or more pairs of lead holes are formed in the junction box, each pair of lead holes can lead in one pair of leads in the photovoltaic module, the lead in the first lead can be defined as the first lead hole, and the lead in the second lead is the second lead hole. And a bypass diode corresponding to each pair of lead holes is arranged in the junction box and used for preventing the cell in the photovoltaic module from being damaged due to hot spot effect when the cell is shielded by shadow. When a pair of leads is introduced into the junction box, the lead of the positive bus bar (i.e., the first lead) is connected to the negative electrode of the corresponding diode, and the lead of the negative bus bar (i.e., the second lead) is connected to the positive electrode of the corresponding diode.
As shown in fig. 1, the pads 301 and 302 constitute a first pad group, and the pads 301 and 302 are disposed on the substrate 101 at a distance. The pads 303 and the pads 304 constitute a second pad group, and the pads 303 and the pads 304 are disposed on the substrate 101 at a distance. Meanwhile, the substrate 101 is provided with a first lead hole 401 and a second lead hole 402, a first lead 201 of the pair of leads is led into the junction box from the first lead hole 401, and a second lead 202 is led into the junction box from the second lead hole 402. The first lead 201 is welded to a pad 301 and a pad 302 in the first pad group, respectively, and the same second lead 202 is welded to a pad 303 and a pad 3044 in the second pad group, respectively. It should be noted that each pad group may include 2, 3, 4, and 5 pads, and when the lead is introduced into the box, the lead only needs to be welded to a plurality of pads in the corresponding pad group. When the number of the bonding pads in each bonding pad group is large, the lead can be only welded with a part of the bonding pads in the corresponding bonding pad group. The specific structure of the junction box, the number of the bonding pads in the first bonding pad group and the second bonding pad group, the distance between the adjacent bonding pads, and the like can be specifically set according to requirements, and this embodiment does not limit this.
Optionally, the junction box may further include a diode, a first conductive sheet and a second conductive sheet; a plurality of bonding pads in the first bonding pad group are respectively connected with the first end of the diode through the first conducting sheet; and a plurality of bonding pads in the second bonding pad group are respectively connected with the second end of the diode through the second conducting sheet.
Optionally, the first conducting sheet includes a first connecting portion and a first reinforcing portion connected to each other; the first connecting part is arranged on the substrate to connect the diode and the bonding pad in the first bonding pad group; the first reinforcing part is arranged along the side wall and extends a first preset distance in the direction away from the substrate; the second conducting sheet comprises a second connecting part and a second reinforcing part which are mutually connected; the second connecting part is arranged on the substrate to connect the diode and the bonding pad in the second bonding pad group; the second reinforcing part is arranged along the side wall and extends a second preset distance in the direction away from the substrate.
In this embodiment, the junction box is provided with a diode 501 corresponding to the first pad group and the second pad group in the pair of pad groups. As shown in fig. 1, the first conductive sheet includes a first connection portion 502 and a first reinforcement portion 503 that are connected to each other, the first connection portion 502 is attached to the substrate 101 and covers a partial region of the substrate 101, the second conductive sheet includes a second connection portion 504 and a second reinforcement portion 505, and the second connection portion 504 is attached to the substrate 101 and covers a partial region of the substrate 101. The bonding pad 301 and the bonding pad 302 in the first bonding pad group are respectively welded to the first connecting portion 502, the bonding pad 301 and the bonding pad 302 are connected through the first connecting portion 502, and the bonding pad 301 and the bonding pad 302 are connected with the first conducting sheet. Similarly, the pad 303 and the pad 304 in the second pad group are respectively soldered to the second connection portion 504, the connection between the pad 303 and the pad 304 is realized through the second connection portion 504, and the connection between the pad 303 and the pad 304 and the second via is realized. When the first lead 201 is introduced into the first lead hole 401, and the first lead 201 is a lead of the positive bus bar, the first conducting sheet is connected with the negative electrode of the diode 501, that is, the first end of the diode is the positive electrode of the diode. On the other hand, the second lead 202 is led into the second lead hole 402, and when the second lead 202 is a lead of a cathode bus bar, the second conducting sheet is connected to the anode of the diode 501, that is, the second end of the diode is the cathode of the diode. It should be noted that, during the installation of the junction box, corresponding leads may be led from the first lead hole and the second lead hole according to the polarities of the two ends of the diode. The pad may be connected to the diode in other ways, which is not limited in this embodiment.
As shown in fig. 1, the first reinforcing portion 503 is disposed closely to the sidewall 102, one end of the first reinforcing portion 503 close to the substrate 101 is fixedly connected to the first connecting portion 502, and one end of the first reinforcing portion 503 far from the substrate 101 extends a first preset distance in a direction far from the substrate 101. Similarly, the second reinforcing portion 505 is disposed closely to the sidewall 102, one end of the second reinforcing portion 505 close to the substrate 101 is fixedly connected to the second connecting portion 504, and one end of the second reinforcing portion 505 far from the substrate 101 extends a second preset distance in a direction far from the substrate 101. In practical applications, the first conductive sheet is usually made of a metal material with high hardness and good conductivity, the metal material is copper, and the reinforcing portion is disposed along the side wall of the box body and connected to the connecting portion mounted on the substrate, so as to improve the strength of the box body. The first preset distance and the second preset distance may be the same or different, and specific values of the first preset distance and the second preset distance may be set according to requirements, which is not limited in this embodiment.
It should be noted that the junction box shown in fig. 1 only includes a pair of first pad group and second pad group, in practical application, the junction box may include a plurality of pairs of first pad group and second pad group, for each pair of first pad group and second pad group, a pair of first connection hole and second connection hole may be provided, and a corresponding diode, first conduction sheet and second conduction sheet may be provided, at this time, the junction box may introduce a plurality of pairs of first lead and second lead in the photovoltaic module through the plurality of pairs of first connection hole and second connection hole.
In the prior art, each lead is welded with a corresponding conducting sheet through a bonding pad to realize connection with a diode, and a welding point is formed between the lead and the conducting sheet through only one bonding pad. When the lead wire and the bonding pad are in cold joint, the lead wire cannot be normally connected with the conducting sheet, so that the lead wire cannot be normally connected with the diode, and the photovoltaic module fails. In the junction box shown in fig. 1, the first lead is soldered to the pad 301 and the pad 302 in the first pad group, two soldering points are formed by the two pads, and when one of the soldering points is cold-soldered, the normal connection with the first conducting sheet can be realized by the other soldering point, so that the normal connection with the diode is realized. Similarly, the second lead is welded with the pad 303 and the pad 304 in the second pad group to form two welding points, and when one welding point is in cold joint, the normal connection with the second conducting sheet can be realized through the other welding point, so that the normal connection with the diode can be realized, and the problem of high failure rate of the photovoltaic module caused by cold joint can be reduced. When the number of the bonding pads in each bonding pad group is larger, the lead can be welded with the bonding pads with the larger number in the corresponding bonding pad group to form more welding points, so that the failure rate caused by insufficient welding can be reduced.
In summary, in the embodiment of the invention, the junction box includes a box body, a first pad group and a second pad group, the box body is provided with a first lead hole and a second lead hole, the first lead hole is used for leading in a first lead included in the photovoltaic module, and the second lead hole is used for leading in a second lead included in the photovoltaic module; the first pad group and the second pad group respectively comprise a plurality of pads, and the pads are arranged on the substrate in the box body at intervals and are connected with each other; under the condition that the first lead and the second lead are introduced into the box body, the plurality of bonding pads in the first bonding pad group are welded with the first lead, and the plurality of bonding pads in the second bonding pad group are welded with the second lead. Through setting up a plurality of pads, make the lead wire among the photovoltaic module can form a plurality of welding points through a plurality of pads, when certain welding point rosin joint, can realize normal connection through other welding points to can solve because of the rosin joint problem leads to the higher problem of photovoltaic module fault rate.
Optionally, the first lead and the second lead each have a plurality of lead heads; the plurality of bonding pads in the first bonding pad group are used for being welded with the plurality of lead heads of the first lead; the plurality of pads in the second pad group are for bonding with a plurality of lead heads of the second lead.
In one embodiment, the lead in the photovoltaic assembly can be improved to have a plurality of connection heads, so that a plurality of bonding pads in a corresponding bonding pad group can be respectively connected through the plurality of connection heads. As shown in fig. 4, fig. 4 is a partially enlarged view of a position a in fig. 2, and during the manufacturing process of the photovoltaic module, a portion of the first lead 201 led into the junction box may be cut to obtain a lead 2011 and a lead 2012, and a portion of the second lead 202 led into the junction box may be cut to obtain a lead 2021 and a lead 2022. During the manufacturing process of the photovoltaic module, wider solder strips (for example, solder strips with the thickness of 7 mm or more) can be selected as the first lead and the second lead so as to facilitate cutting of the first lead and the second lead. The specific forming method of the multi-lead head can be set according to the requirement, and this embodiment does not limit this. As shown in fig. 5, fig. 5 is an isometric view of another junction box provided in this embodiment of the application, when the lead 2011 and the lead 2012 are introduced into the junction box, the lead 2011 may be welded to the pad 301, and the lead 2012 may be welded to the pad 302, so that the first lead 201 may be simultaneously connected to the pad 301 and the pad 302 through the lead 2011 and the lead 2012, and thus the first lead 201 may be connected to the first conducting tab through two welding points. Likewise, when the lead 2021 and the lead 2022 are introduced into the terminal block, the lead 2021 may be soldered to the pad 303, the lead 2022 may be soldered to the pad 304, and the second lead 202 may be connected to the pad 301 and the pad 302 through the lead 2021 and the lead 2022 at the same time, so that the second lead 202 may be connected to the second conductive pad through two soldering points.
In practical applications, a plurality of leads of each lead may be the same or different, and one lead may be connected to one pad or a plurality of pads in a corresponding pad group, as shown in fig. 6, fig. 6 shows an isometric view of a junction box provided in an embodiment of the present application, where a lead 2011 of a first lead 201 is welded to a pad 301 and a pad 302 at the same time, and a lead 2012 is welded to a pad 302. Similarly, the lead 2021 of the second lead is soldered to the pad 303 and the pad 304, and the lead 2022 is soldered to the pad 303. When the lead head is welded with a plurality of welding pads, the number of welding points between the lead and the corresponding conducting sheet can be increased, and the failure rate of the photovoltaic module can be further reduced.
In the embodiment of the invention, the leads are respectively provided with a plurality of lead heads, the pad groups are respectively provided with a plurality of pads, and the leads can be connected with the pads in the corresponding pad groups through the plurality of lead heads to form a plurality of welding points. The arrangement of the multi-lead head can facilitate the welding of the leads and the plurality of bonding pads in the corresponding bonding pad group.
Optionally, a plurality of pads in the first pad group are arranged at intervals in a first region on the substrate, and the first lead hole is opened in the first region; a plurality of bonding pads in the second bonding pad group are arranged in a second area on the substrate at intervals, and the second lead holes are formed in the second area.
In one embodiment, the base of the junction box may be divided into a plurality of regions, each region corresponding to a pad group. As shown in fig. 1, a region where the pad 301 and the pad 302 are located in the first pad group is a first region, and a region where the pad 303 and the pad 304 are located in the second pad group is a second region. In the first region, the pad 301 and the pad 303 are disposed at an interval, and the first lead hole 401 is opened to the right of the pad 302. Similarly, in the second region, the pad 303 and the pad 304 in the second pad group are spaced apart from each other, and the second lead hole 402 is opened on the left side of the pad 303. The specific positions of the lead holes in the corresponding regions may be set according to requirements, which is not limited in this embodiment.
In the embodiment of the invention, different bonding pad groups are arranged in different regions, and each bonding pad group and the corresponding lead hole are arranged in the same region, so that leads can be conveniently led into the region where the corresponding bonding pad group is located, and the leads can be conveniently welded with a plurality of bonding pads in the corresponding bonding pad group.
Optionally, the first region and the second region are adjacent and a baffle is disposed between the first region and the second region.
In one embodiment, a pair of the first pad group and the second pad group may be disposed at adjacent regions, and a barrier may be disposed between the first region and the second region to prevent the pads of the first pad group and the pads of the second pad group from interfering with each other during the welding process. As shown in fig. 1, the baffle plate 600 is disposed between the first region and the second region, one end of the baffle plate 600 is connected to the substrate of the junction box, and the other end extends a certain distance in a direction away from the substrate 101 to shield the first pad group in the first region and the second pad group in the second region. When a plurality of regions are arranged in the substrate, baffles can be arranged between adjacent regions. The specific size of the baffle can be set as required.
In the embodiment of the invention, a baffle plate can be arranged between the adjacent first region and the second region so as to prevent the bonding pads in the first bonding pad group and the bonding pads in the second bonding pad group from influencing each other in the welding process.
Optionally, in the first region, the plurality of pads in the first pad group are arranged in two rows, and the first lead hole is opened between the two rows of pads in the first region; in the second region, the plurality of bonding pads in the second bonding pad group are arranged in two rows, and the second lead hole is arranged between the two rows of bonding pads in the second region.
Optionally, one pad is provided for each column of pads in the first and second regions.
In one embodiment, the plurality of pads in each region may be arranged in two rows, and corresponding wire holes may be opened between the two rows of pads. As shown in fig. 5, the first pad group corresponding to the first region includes two pads, namely, a pad 301 and a pad 302, the pad 301 is a pad in one column, the pad 302 is a pad in another column, and the first lead hole 401 is disposed between the pads in the two columns. Similarly, the second pad group corresponding to the second region includes a pad 303 and a pad 304, the pad 301 is a column of pads, the pad 302 is another column of pads, and the second lead hole 402 is disposed between the two columns of pads. It should be noted that each column of pads may include 2, 3, 4, and the like, and the number of pads included in each column of pads may be set according to requirements, which is not limited in this embodiment.
In the embodiment of the invention, the bonding pads in each area are divided into two rows, and the lead holes are arranged between the two rows of bonding pads, so that the leads can be conveniently welded with a plurality of bonding pads in the corresponding bonding pad group. When each column of pads comprises two opposite pads, the problems of large number of pads and complex welding can be avoided.
Optionally, the first lead hole is composed of a plurality of adjacent first sub-lead holes, each of which is used for leading in a lead head of the first lead;
the second lead hole is composed of a plurality of adjacent second sub-lead holes, and each second sub-lead hole is used for leading in a lead head of the second lead.
In one embodiment, when the lead has a plurality of leads, the corresponding lead hole may be provided with a plurality of sub-lead holes. As shown in fig. 5 and fig. 6, the first lead hole 401 may be composed of two sub-lead holes, one sub-lead hole is used for leading in the lead 2011, and the other sub-lead hole is used for leading in the lead 2012. Similarly, the second lead hole 402 may be composed of two sub-lead holes, one sub-lead hole is used for leading in the lead 2021, and the other sub-lead hole is used for leading in the lead 2022. The number of sub-lead holes of each lead hole can be set according to the number of lead heads of the corresponding lead, and the number of sub-lead holes of the lead hole can be larger than or equal to the number of lead heads of the corresponding lead. Each lead hole comprises a plurality of sub lead holes which can be arranged at adjacent positions or at intervals.
In the embodiment of the invention, the corresponding sub-lead holes are arranged for the lead with a plurality of lead heads, so that the plurality of lead heads of the lead can be conveniently separated in the process of leading the lead into the junction box, and the plurality of lead heads can be conveniently welded on a plurality of bonding pads in the corresponding bonding pad group.
The embodiment of the application also provides a photovoltaic module, which comprises the junction box.
Referring to fig. 7, a flow chart illustrating steps of a method for manufacturing a photovoltaic module according to an embodiment of the present application is provided, the method including:
and 701, mounting a junction box on the assembled photovoltaic module.
Wherein the photovoltaic module has a first lead and a second lead. The photovoltaic module comprises a front rigid cover plate, a first packaging adhesive film, a battery sheet layer, a second packaging adhesive film and a back plate which are stacked. In the manufacturing process of the photovoltaic module, a front rigid cover plate, a first packaging adhesive film, a battery sheet layer, a second packaging adhesive film and a back plate can be laid in sequence, the front rigid cover plate, the first packaging adhesive film, the battery sheet layer, the second packaging adhesive film and the back plate are laminated into a photovoltaic laminating part through a laminating process, and then frames are installed on the periphery of the photovoltaic laminating part through a framing process to obtain the photovoltaic module. As shown in fig. 2, the cell sheet layer is composed of one or more groups of cell strings, one end of a positive bus bar and one end of a negative bus bar in a group of cell strings are respectively led out of the photovoltaic laminate, and the current generated by a group of cell strings is led out of the photovoltaic laminate, and a lead of the positive bus bar can be defined as a first lead 201, and a lead of the negative bus bar is defined as a second lead 202.
It should be noted that, a specific manufacturing process of the photovoltaic module may be set according to a requirement, and this embodiment does not limit this.
Step 702, a first lead is introduced into the terminal block through the first lead hole, and a second lead is introduced into the terminal block through the second lead hole.
The first lead hole and the second lead hole are formed in the box body of the junction box.
As shown in fig. 1, a first lead hole 401 and a second lead hole 402 are formed on the base of the junction box, after the first lead 201 and the second lead 202 shown in fig. 2 are obtained, the junction box can be mounted on the back of the photovoltaic module, then the first lead 201 is led into the junction box through the first lead hole 401, and the second lead 202 is led into the junction box through the second lead hole 402.
The plurality of bonding pads in the first bonding pad group are arranged on the substrate in the box body at intervals and are connected with each other, and the plurality of bonding pads in the second bonding pad group are arranged on the substrate in the junction box at intervals and are connected with each other.
As shown in fig. 1, after the first lead 201 and the second lead 202 are respectively introduced into the junction box, the first lead 201 and the second lead 202 may be welded, the first lead 201 may be welded to the pads 301 and 302 of the first pad group, and the second lead 202 may be welded to the pads 303 and 304 of the second pad group, so that the first lead 201 may be welded to the pads of the first pad group, and the second lead 202 may be welded to the pads of the second pad group. The method for bonding the wires to the pads may be set according to the requirement, and this embodiment does not limit this.
After the first lead is welded with the plurality of bonding pads in the first bonding pad group and the second lead is welded with the plurality of bonding pads in the second bonding pad group, the junction box can be buckled through the box cover, sealant is filled into the junction box to seal the junction box, and after the sealant is cured, the photovoltaic assembly can be cleaned and tested to obtain the qualified photovoltaic assembly. The specific processes after welding can be set according to the requirement, and this embodiment does not limit this.
Optionally, before step 703, the method may further include:
cutting a portion of the first lead for introducing the terminal block into a plurality of lead heads, and cutting a portion of the second lead for introducing the terminal block into a plurality of lead heads;
accordingly, step 703 may be implemented as follows:
the plurality of bonding pads in the first bonding pad group are bonded using the plurality of lead heads of the first lead, and the plurality of bonding pads in the second bonding pad group are bonded using the plurality of lead heads of the second lead.
As shown in fig. 4, before the first lead 201 is soldered to the pads in the first pad group, a portion of the first lead 201 led into the junction box may be cut to obtain a lead 2011 and a lead 2012, and a portion of the second lead 202 led into the junction box may be cut to obtain a lead 2021 and a lead 2022. The lead head can be manually cut, for example, after the first lead 201 is led into the junction box, the first lead 201 led into the junction box can be manually cut by a worker, so as to obtain the lead head 2011 and the lead head 2012. Alternatively, the lead heads may be automatically cut by a mechanical device during the process of laying the battery sheet layers, for example, before the bus bar is welded, the mechanical device may automatically cut the portion of the first lead 201 that needs to be led into the junction box to obtain the lead heads 2011 and 2012, or after the bus bar is welded, the portion of the first lead 201 that needs to be led into the junction box is cut to obtain the lead heads 2011 and 2012. It should be noted that the first lead and the second lead may be cut at any step before welding, and the embodiment does not limit the specific cutting process.
As shown in fig. 5, when the first lead 201 has a plurality of lead heads, the lead head 2011 of the first lead 201 may be used to weld the pad 301 in the first pad group, and the lead head 2012 of the first lead 201 may be used to weld the pad 302 in the first pad group, so as to weld the first lead 201 and the plurality of pads in the first pad group. Similarly, when the second lead 202 has a plurality of lead heads, the plurality of lead heads of the second lead 202 may be used to weld a plurality of pads in the second pad group, respectively, so as to weld the second lead 202 to the plurality of pads. When each lead has a plurality of lead heads, it is possible to facilitate bonding of the lead to a plurality of pads in a corresponding pad group.
In summary, in the embodiment, the junction box is mounted on the assembled photovoltaic module, the first lead is led into the junction box through the first lead hole, the second lead is led into the junction box through the second lead hole, the first lead is welded to the plurality of pads in the first pad group, and the second lead is welded to the plurality of pads in the second pad group. Set up a plurality of pads in the terminal box, make the lead wire among the photovoltaic module can form a plurality of welding points through a plurality of pads, when certain welding point rosin joint, can realize normal connection through other welding points to can solve because of the rosin joint problem leads to the higher problem of photovoltaic module fault rate.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A junction box, comprising: the box body, the first pad group and the second pad group;
the box body is provided with a first lead hole and a second lead hole, the first lead hole is used for leading in a first lead included by the photovoltaic module, and the second lead hole is used for leading in a second lead included by the photovoltaic module;
the first pad group and the second pad group respectively comprise a plurality of pads, and the pads are arranged on the substrate in the box body at intervals and are connected with each other;
under the condition that the first lead and the second lead are introduced into the case, a plurality of pads in the first pad group are welded with the first lead, and a plurality of pads in the second pad group are welded with the second lead.
2. The junction box of claim 1, wherein the first and second leads each have a plurality of lead heads;
a plurality of bonding pads in the first bonding pad group are used for being welded with a plurality of lead heads of the first lead; the plurality of bonding pads in the second bonding pad group are used for being welded with the plurality of lead heads of the second lead.
3. The junction box of claim 2,
a plurality of bonding pads in the first bonding pad group are arranged in a first area on the substrate at intervals, and the first lead hole is arranged in the first area;
and a plurality of bonding pads in the second bonding pad group are arranged in a second area on the substrate at intervals, and the second lead hole is arranged in the second area.
4. The junction box of claim 3, wherein said first region and said second region are adjacent and a baffle is disposed between said first region and said second region.
5. The junction box of claim 3,
in the first region, the bonding pads in the first bonding pad group are arranged in two rows, and the first lead hole is formed between the two rows of bonding pads in the first region;
in the second region, the plurality of pads in the second pad group are arranged in two rows, and the second lead hole is opened between the two rows of pads in the second region.
6. The junction box of claim 5, wherein one pad is provided for each column of pads in the first and second regions.
7. The junction box of claim 2,
the first lead hole is composed of a plurality of adjacent first sub-lead holes, and each first sub-lead hole is used for leading in a lead head of the first lead;
the second lead hole is composed of a plurality of adjacent second sub-lead holes, and each second sub-lead hole is used for leading in a lead head of the second lead.
8. The junction box of any of claims 1-7, further comprising a diode, a first conductive tab, and a second conductive tab;
a plurality of bonding pads in the first bonding pad group are respectively connected with the first end of the diode through the first conducting sheet;
and a plurality of bonding pads in the second bonding pad group are respectively connected with the second end of the diode through the second conducting sheet.
9. The junction box of claim 8, wherein the box body includes the base, and a sidewall disposed around the base;
the first conducting sheet comprises a first connecting part and a first reinforcing part which are mutually connected; the first connecting part is arranged on the substrate to connect the diode and the bonding pad in the first bonding pad group; the first reinforcing part is arranged along the side wall and extends a first preset distance in the direction back to the substrate;
the second conducting sheet comprises a second connecting part and a second reinforcing part which are mutually connected; the second connecting part is arranged on the substrate to connect the diode and the bonding pad in the second bonding pad group; the second reinforcing part is arranged along the side wall and extends a second preset distance in the direction back to the substrate.
10. A photovoltaic module comprising a junction box according to any one of claims 1 to 9.
11. A method of manufacturing a photovoltaic module, comprising:
mounting a junction box on the assembled photovoltaic module; the photovoltaic module has a first lead and a second lead;
introducing the first lead into a junction box through a first lead hole and introducing the second lead into the junction box through a second lead hole; the first lead hole and the second lead hole are formed in the box body of the junction box;
bonding the first lead to a plurality of pads in a first pad group, and bonding the second lead to a plurality of pads in a second pad group; the multiple bonding pads in the first bonding pad group are arranged on the substrate in the box body at intervals and are connected with each other, and the multiple bonding pads in the second bonding pad group are arranged on the substrate in the junction box at intervals and are connected with each other.
12. The method of claim 11, further comprising, prior to said bonding the first lead to the plurality of pads in the first set of pads and the second lead to the plurality of pads in the second set of pads:
cutting a portion of the first lead for introduction into the junction box into a plurality of lead heads, and cutting a portion of the second lead for introduction into the junction box into a plurality of lead heads;
the bonding the first lead to a plurality of pads in a first pad group and the bonding the second lead to a plurality of pads in a second pad group, comprising: and welding the plurality of bonding pads in the first bonding pad group by using the plurality of lead heads of the first lead, and welding the plurality of bonding pads in the second bonding pad group by using the plurality of lead heads of the second lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110976181.1A CN113765478A (en) | 2021-08-24 | 2021-08-24 | Junction box, photovoltaic module and photovoltaic module manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110976181.1A CN113765478A (en) | 2021-08-24 | 2021-08-24 | Junction box, photovoltaic module and photovoltaic module manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113765478A true CN113765478A (en) | 2021-12-07 |
Family
ID=78791062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110976181.1A Withdrawn CN113765478A (en) | 2021-08-24 | 2021-08-24 | Junction box, photovoltaic module and photovoltaic module manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113765478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2022291656B1 (en) * | 2022-09-30 | 2023-11-23 | Jinko Solar Co., Ltd. | Photovoltaic module and method for producing the same |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091529A (en) * | 1975-10-20 | 1978-05-30 | Western Electric Co., Inc. | Method of forming substrate terminal areas for bonded leads |
| EP0245713A1 (en) * | 1986-05-12 | 1987-11-19 | International Business Machines Corporation | Solder pads for use on printed circuit boards |
| US4991666A (en) * | 1987-12-22 | 1991-02-12 | Societe Anonyme Dite: Alcatel Cit | Terminal pad for fixing a clawed pin to the edge of a hybrid circuit substrate and a connection formed thereby |
| CN202523732U (en) * | 2011-11-18 | 2012-11-07 | 景智电子股份有限公司 | Terminal box |
| CN104080270A (en) * | 2013-03-25 | 2014-10-01 | 飞思卡尔半导体公司 | Separation pad for circuit board |
| CN104505349A (en) * | 2014-12-18 | 2015-04-08 | 南通华达微电子集团有限公司 | Method for enhancing reliability of aluminium wire bonding solder joints |
| CN209676597U (en) * | 2019-01-11 | 2019-11-22 | 惠州市德赛工业研究院有限公司 | A kind of pad structure |
| CN110855237A (en) * | 2019-12-04 | 2020-02-28 | 苏州快可光伏电子股份有限公司 | Junction box for photovoltaic module |
| CN210839471U (en) * | 2019-11-12 | 2020-06-23 | 泰州隆基乐叶光伏科技有限公司 | Photovoltaic busbar connection structure |
| CN213125974U (en) * | 2020-09-11 | 2021-05-04 | 西安隆基绿能建筑科技有限公司 | Photovoltaic junction box and photovoltaic module |
-
2021
- 2021-08-24 CN CN202110976181.1A patent/CN113765478A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091529A (en) * | 1975-10-20 | 1978-05-30 | Western Electric Co., Inc. | Method of forming substrate terminal areas for bonded leads |
| EP0245713A1 (en) * | 1986-05-12 | 1987-11-19 | International Business Machines Corporation | Solder pads for use on printed circuit boards |
| US4991666A (en) * | 1987-12-22 | 1991-02-12 | Societe Anonyme Dite: Alcatel Cit | Terminal pad for fixing a clawed pin to the edge of a hybrid circuit substrate and a connection formed thereby |
| CN202523732U (en) * | 2011-11-18 | 2012-11-07 | 景智电子股份有限公司 | Terminal box |
| CN104080270A (en) * | 2013-03-25 | 2014-10-01 | 飞思卡尔半导体公司 | Separation pad for circuit board |
| CN104505349A (en) * | 2014-12-18 | 2015-04-08 | 南通华达微电子集团有限公司 | Method for enhancing reliability of aluminium wire bonding solder joints |
| CN209676597U (en) * | 2019-01-11 | 2019-11-22 | 惠州市德赛工业研究院有限公司 | A kind of pad structure |
| CN210839471U (en) * | 2019-11-12 | 2020-06-23 | 泰州隆基乐叶光伏科技有限公司 | Photovoltaic busbar connection structure |
| CN110855237A (en) * | 2019-12-04 | 2020-02-28 | 苏州快可光伏电子股份有限公司 | Junction box for photovoltaic module |
| CN213125974U (en) * | 2020-09-11 | 2021-05-04 | 西安隆基绿能建筑科技有限公司 | Photovoltaic junction box and photovoltaic module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2022291656B1 (en) * | 2022-09-30 | 2023-11-23 | Jinko Solar Co., Ltd. | Photovoltaic module and method for producing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3223119U (en) | Solar cell and solar cell module | |
| JP3443029B2 (en) | Solar cell module, power generation device, and method of manufacturing solar cell module | |
| US20050236031A1 (en) | Terminal box for a solar battery module and a method for producing such a terminal box | |
| KR20080100373A (en) | Method of coupling photovoltaic cells and film for implementing it | |
| WO2024055674A1 (en) | Soldering method and photovoltaic module | |
| CN101488536B (en) | Convergence belt for solar photovoltaic component and method for assembling solar panel by convergence belts | |
| CN108538944B (en) | Photovoltaic conductive backboard and photovoltaic cell assembly | |
| WO2021037020A1 (en) | Main-gate-free solar cell and main-gate-free solar photovoltaic module | |
| CN115579407B (en) | Electrode structure, back contact solar cell, cell module and photovoltaic system | |
| JP2024516468A (en) | Back contact solar cell strings and methods, assemblies and systems thereof | |
| CN112331730A (en) | Full-black solar photovoltaic module and manufacturing method thereof | |
| CN115295651A (en) | Main-grid-free IBC battery pack unit, manufacturing method thereof, battery pack and battery pack string | |
| CN114388636A (en) | Back contact battery string, back contact battery assembly and back contact battery system | |
| CN113765478A (en) | Junction box, photovoltaic module and photovoltaic module manufacturing method | |
| CN211480058U (en) | Insulating busbar and photovoltaic module with same | |
| CN111293184B (en) | Solar cell string, cell module and preparation method thereof | |
| KR101172017B1 (en) | Pcb type of bus bar using manufacture methode of solar cell | |
| CN112186059B (en) | Photovoltaic module and preparation method and application thereof | |
| CN214043690U (en) | Photovoltaic module | |
| CA3212617A1 (en) | Solar cell string and method for producing a solar cell string | |
| JPS6230507B2 (en) | ||
| CN111510064A (en) | Integrated bypass protection device for solar field and process method thereof | |
| CN218849509U (en) | Bus bar and solar cell module | |
| CN114122179B (en) | Interdigital back contact cell string, interdigital back contact cell assembly and system | |
| Walmsley et al. | Low cost automated manufacture of high specific power photovoltaic solar arrays for space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211207 |