CN215988800U

CN215988800U - Photovoltaic module and photovoltaic series welding equipment

Info

Publication number: CN215988800U
Application number: CN202121361612.5U
Authority: CN
Inventors: 崔艳峰; 黄强; 于松坤; 杨高平; 高贝贝
Original assignee: Dongfang Risheng Changzhou New Energy Co ltd
Current assignee: Dongfang Risheng Changzhou New Energy Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-03-08
Anticipated expiration: 2031-06-18

Abstract

The embodiment of the application relates to a photovoltaic module and photovoltaic series welding equipment, wherein a plurality of welding strips in a first group of welding strips are arranged on a positive electrode of a first cell at intervals and are provided with first parts extending out of the positive electrode; a plurality of welding strips in the second group of welding strips are arranged on the negative electrode of the second battery piece at intervals and are provided with second parts extending out of the negative electrode; at least one conductive structure body located in a gap between the first cell piece and the second cell piece; the upper side of the conductive structure body is conductively connected with each first part of the plurality of solder strips in the first group of solder strips; the lower side of the conductive structure body is conductively connected with each second part of the plurality of solder strips in the second group of solder strips; therefore, the production efficiency is improved, the productivity is correspondingly increased, and the production cost is reduced; in addition, the conductive structure forms conductive connection among the plurality of solder strips, so that carriers can be led out better.

Description

Photovoltaic module and photovoltaic series welding equipment

Technical Field

The application relates to the field of solar cells, in particular to a photovoltaic module and photovoltaic series welding equipment.

Background

At present, the assembly manufacturing process in the photovoltaic industry is as follows: the method comprises the steps of battery piece-series welding of battery pieces-typesetting-laminating-edging-framing-wiring box-mounting-cleaning-testing-packaging. The most important link is series welding, which is to connect the positive and negative electrodes of different numbers of battery pieces through welding strips to form a battery string. At present, the industry is realized by adopting automatic series welding equipment. In production, a manipulator firstly grabs a battery piece and places the battery piece on a heating conveyor belt, then grabs a welding belt with a certain length which is usually more than 2 times of the size of the battery piece, half of the length of the welding belt is laid on the battery piece, the rest half of the welding belt is placed on the heating conveyor belt, a heating lamp tube above the welding belt descends, and the welding belt is heated and welded on a metal electrode of the battery piece; then another battery piece is placed on the battery piece, and the connection of the positive electrode and the negative electrode of the plurality of battery pieces is realized by repeating the above steps.

However, in the photovoltaic module and the series welding equipment for preparing the photovoltaic module in the prior art, the cells need to be welded one by one, so that the production efficiency is low, the productivity is not high, and the production cost is difficult to reduce.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present application provide a photovoltaic module and a photovoltaic series welding apparatus to solve at least one problem in the background art.

In a first aspect, an embodiment of the present application provides a photovoltaic module, including:

a plurality of series-connected battery cells, each of the battery cells comprising a positive electrode on a first surface and a negative electrode on a second surface, the first surface and the second surface being oppositely disposed; each cell sheet is arranged in a manner that a positive electrode faces upwards or in a manner that a negative electrode faces upwards; gaps are reserved between the first battery piece and the second battery piece which are arranged adjacently in the plurality of battery pieces;

the welding strip at least comprises a first group of welding strips and a second group of welding strips which are arranged in parallel, and the first group of welding strips and the second group of welding strips respectively comprise a plurality of welding strips;

a plurality of solder strips in the first set of solder strips are arranged on the positive electrode of the first battery piece at intervals and are provided with first parts extending out of the positive electrode; a plurality of welding strips in the second group of welding strips are arranged on the negative electrode of the second battery piece at intervals and are provided with second parts extending out of the negative electrode;

at least one conductive structure body located in a gap between the first cell piece and the second cell piece; the upper side of the conductive structure body is conductively connected with each first part of the plurality of solder strips in the first group of solder strips; the underside of the conductive structure is conductively connected to each of the second portions of the plurality of solder strips in the second set of solder strips.

In an alternative embodiment, the upper side and the lower side of the conductive structure are both sides of the conductive structure in the radial direction; the conductive structure axially spans each first portion of the plurality of solder strips in the first set of solder strips.

In an alternative embodiment, the conductive structure is a metallic copper wire.

In an alternative embodiment, the conductive wire is a conductive tape.

In an alternative embodiment, the solder strips further include a third set of solder strips, the third set of solder strips including a plurality of solder strips;

and the plurality of welding strips in the third group of welding strips are arranged on the positive electrode of the second battery piece at intervals, and one side, facing the first battery piece, of each welding strip in the third group of welding strips is disconnected with each first part of the plurality of welding strips in the corresponding first group of welding strips.

In an optional embodiment, the first battery piece and the second battery piece are both battery pieces with main grids;

a plurality of welding strips in the first group of welding strips are arranged on the positive electrode of the first battery piece at intervals, and specifically, the plurality of welding strips in the first group of welding strips are respectively aligned with each main grid of the positive electrode of the first battery piece;

and a plurality of welding strips in the second group of welding strips are arranged on the negative electrode of the second battery piece at intervals, and specifically, the plurality of welding strips in the second group of welding strips are respectively aligned with each main grid of the negative electrode of the second battery piece.

In an optional embodiment, the first battery piece and the second battery piece are both battery pieces without main grids;

the plurality of welding strips in the first group of welding strips are arranged on the positive electrode of the first battery piece at intervals, specifically, the plurality of welding strips in the first group of welding strips are arranged on the positive electrode of the first battery piece at intervals;

the plurality of welding strips in the second group of welding strips are arranged on the negative electrode of the second battery piece at intervals, specifically, the plurality of welding strips in the second group of welding strips are arranged on the negative electrode of the second battery piece at intervals.

In a second aspect, an embodiment of the present application provides a photovoltaic series welding device, including:

the device comprises a rack, a first feeding device and a second feeding device, wherein the rack comprises a feeding end and a discharging end;

the material box mechanism is positioned at the feeding end of the frame and used for accommodating the battery pieces to be welded;

the welding strip loading mechanism is positioned on the rack and used for loading the welding strip;

the conductive structure loading mechanism is positioned on the rack and used for loading the conductive structure;

the welding mechanism is positioned on the rack, positioned between the feeding end and the discharging end and used for welding the battery piece and the welding strip and welding the conductive structure body and the welding strip;

the cutter mechanism is positioned on the rack, is arranged adjacent to the welding mechanism and is used for cutting off the welding strip;

a manipulator which is at least capable of moving between the conductive structure loading mechanism and the welding mechanism and is used for taking out the conductive structure from the conductive structure loading mechanism and moving the taken out conductive structure to the welding mechanism;

and the discharging mechanism is positioned at the discharging end of the rack.

In an alternative embodiment, the conductive structure loading mechanism is specifically located on the rack and between the magazine mechanism and the welding mechanism.

In an alternative embodiment, the conductive structure loading mechanism, the welding mechanism and the cutter mechanism are arranged between the feeding end and the discharging end in sequence.

Compared with the related art, the photovoltaic module and the photovoltaic series welding equipment provided by the embodiment of the application are arranged on the positive electrode of the first cell piece at intervals through the plurality of welding strips in the first group of welding strips, and are provided with the first parts extending out of the positive electrode; a plurality of welding strips in the second group of welding strips are arranged on the negative electrode of the second battery piece at intervals and are provided with second parts extending out of the negative electrode; at least one conductive structure body located in a gap between the first cell piece and the second cell piece; the upper side of the conductive structure body is conductively connected with each first part of the plurality of solder strips in the first group of solder strips; the lower side of the conductive structure body is conductively connected with each second part of the plurality of solder strips in the second group of solder strips; therefore, the photovoltaic module and the photovoltaic series welding equipment provided by the embodiment of the application can be used for welding a plurality of battery pieces at the same time, so that the production efficiency is improved, the productivity is correspondingly improved, and the production cost is reduced; in addition, the conductive structure forms conductive connection among the plurality of solder strips, so that carriers can be led out better.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1a is a schematic structural cross-sectional view of a series welding process of a battery plate according to an embodiment of the present application;

fig. 1b is a schematic cross-sectional view of a battery string structure according to an embodiment of the present disclosure;

fig. 1c is a schematic top view of a battery string structure according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a photovoltaic series welding apparatus provided in an embodiment of the present application;

fig. 3 is a schematic perspective view of a cutter mechanism according to an embodiment of the present disclosure;

fig. 4 is an enlarged schematic view of the structure of the cutter and the bisection platform in the cutter mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

First, the embodiment of the application provides a photovoltaic module. As shown in fig. 1b and fig. 1c, the photovoltaic module includes a plurality of cells connected in series, each cell includes a positive electrode on a first surface and a negative electrode on a second surface, and the first surface and the second surface are opposite; each cell piece is arranged with the positive electrode facing upward or with the negative electrode facing upward (shown as an example in fig. 1b with the positive electrode facing upward); a gap is reserved between a first battery piece and a second battery piece which are adjacently arranged in the plurality of battery pieces;

the solder strips at least comprise a first group of solder strips 261 and a second group of solder strips 262 which are arranged in parallel, and the first group of solder strips 261 and the second group of solder strips 262 respectively comprise a plurality of solder strips;

a plurality of solder strips in the first set of solder strips 261 are spaced apart on the positive electrode of the first cell piece and have respective first portions 2611 extending beyond the positive electrode; a plurality of solder strips in the second group of solder strips are arranged on the negative electrode of the second cell at intervals and are provided with second parts 2621 extending out of the negative electrode;

at least one conductive structure 280 in the gap between the first cell and the second cell; the upper side of the conductive structure 280 is conductively connected to each of the first portions 2611 of the plurality of solder strips in the first set of solder strips 261; the underside of conductive structure 280 is conductively coupled to each second portion 2621 of the plurality of solder strips in second set of solder strips 262.

The photovoltaic module provided by the embodiment of the application can be formed by welding a plurality of battery pieces at the same time, so that the production efficiency is high, the productivity is correspondingly increased, and the production cost is reduced. In addition, the conductive structure forms conductive connection among the plurality of solder strips, so that carriers can be led out better.

Next, the photovoltaic module and the forming process thereof will be described in detail with reference to fig. 1 a; as shown in fig. 1a, first, the lower welding strip 62 is arranged, and the length of the lower welding strip 62 is larger than the sum of the lengths of the plurality of battery pieces to be series-welded. A plurality of battery pieces are arranged on the lower welding strip 62, and a certain distance is arranged between every two adjacent battery pieces. Each cell slice comprises a positive electrode positioned on a first surface and a negative electrode positioned on a second surface, and the first surface and the second surface are oppositely arranged; for example, a first cell piece 210 and a second cell piece 220 are adjacently arranged in the figure, the first cell piece 210 includes a positive electrode 211 located on a first surface and a negative electrode 212 located on a second surface, and the second cell piece 220 includes a positive electrode 221 located on the first surface and a negative electrode 222 located on the second surface; in the present embodiment, the arrangement direction of the positive electrode and the negative electrode of each of the plurality of battery pieces arranged on the lower welding strip 62 is the same, for example, the positive electrode 211 of the first battery piece 210 faces upward, and the negative electrode 212 of the first battery piece 210 is in contact with the lower welding strip 62; likewise, the positive electrode 221 of the second cell 220 faces upward, and the negative electrode 222 of the second cell 220 contacts the under-weld 62. Arranging a conductive structure 280 in an interval between adjacent two battery pieces; and the upper solder strips 61 are arranged on the plurality of battery pieces, and the length of the upper solder strips 61 may be the same as that of the lower solder strips 62. The upper solder strips 61, the lower solder strips 62, the conductive structure 280 and the respective battery cells are soldered together by a soldering mechanism to form the structure shown in fig. 1 a.

Next, the upper and lower solder strips 61, 62 are cut; specifically, the cutting can be performed by a cutter mechanism in the photovoltaic series welding device provided by the embodiment of the application. In practice, the plurality of cutters are driven by a driving element in the cutter mechanism to move in a vertical direction simultaneously, and the upper solder ribbon 61 and the lower solder ribbon 62 are press-cut at the positions shown in fig. 1a, thereby forming the structure shown in fig. 1 b. The cutter head on the cutter 130 is shown schematically at 131 in fig. 1a, and the press-cutting position is shown by "x" in the figure. As shown, the cutting and pressing positions are a lower solder strip on one side of each conductive structure 280 and an upper solder strip on the other side of the conductive structure 280; specifically, taking the conductive structure 280 located between the first cell piece 210 and the second cell piece 220 as an example, the cutting positions are a lower welding strip between the conductive structure 280 and the first cell piece 210, and an upper welding strip between the conductive structure 280 and the second cell piece 220.

Similarly, fig. 1a is only for illustrating the related structure as much as possible, and does not represent a limitation on the actual press-cutting sequence.

In fig. 1b, a plurality of battery cells are connected in series with each other. Taking the first cell piece 210 and the second cell piece 220 which are adjacently arranged as an example, a first group of welding strips 261 are formed by performing press cutting on the upper welding strips 61, and the first group of welding strips 261 are arranged on the positive electrode 211 of the first cell piece 210; and a second set of solder strips 262 is formed by pressing and cutting the lower solder strips 62, the second set of solder strips 262 being arranged on the negative electrode 222 of the second cell piece 220, so that the positive electrode 211 of the first cell piece 210 and the negative electrode 222 of the second cell piece 220 are conductively connected through the first set of solder strips 261, the conductive structure 280 and the second set of solder strips 262. Similarly, the other two adjacent battery pieces also form the series connection of the positive electrode and the negative electrode. It should be understood that for embodiments where each cell is arranged with the negative electrode facing upward, a second set of solder strips arranged on the negative electrode of a second cell may be formed by press cutting the upper solder strip 61; by press-cutting the under-welding strips 62, a first set of welding strips arranged on the positive electrode of the first cell piece can be formed; and will not be described in detail herein.

Fig. 1c specifically shows a top view of the structure after the first battery piece 210 and the second battery piece 220 are connected in series, and as can be seen from fig. 1b and 1c, by performing the pressing cutting on the upper welding strip 61 and the lower welding strip 62, a plurality of welding strips in the first group of welding strips 261 are formed to have respective first portions 2611 extending out of the positive electrode 211 of the first battery piece 210; a plurality of solder strips in the second set of solder strips 262 are formed to have respective second portions 2621 extending beyond the negative electrodes 222 of the second cell 220; the upper side of the conductive structure 280 is conductively connected to each of the first portions 2611 of the plurality of solder strips in the first set of solder strips 261; the underside of conductive structure 280 is conductively coupled to each second portion 2621 of the plurality of solder strips in second set of solder strips 262.

In some alternative embodiments, the upper and lower sides of the conductive structure 280 are both sides of the conductive structure in the radial direction; the conductive structure 280 axially spans each first portion of the plurality of solder strips in the first set of solder strips 261, thereby conductively connecting an upper side of the conductive structure 280 to each first portion 2611 of the plurality of solder strips in the first set of solder strips 261. Accordingly, the conductive structure 280 also spans axially over the second portions of the plurality of solder strips in the second set of solder strips 262, thereby conductively connecting the underside of the conductive structure 280 with the second portions 2621 of the plurality of solder strips in the second set of solder strips 262. In the present embodiment, the conductive structure body 280 has a cylindrical structure. Specifically, the material of the conductive structure 280 is copper, specifically, a metallic copper wire.

In an embodiment where the conductive structure 280 is a metal copper wire, the diameter of the metal copper wire may be between 0.8 and 1.5 times the thickness of the cell, and optionally, the diameter of the metal copper wire is, for example, 0.2 mm; in practical application, the diameter of the metal copper wire is not more than 1cm at most.

In addition, when the metallic copper wire is arranged in the gap between the first cell piece and the second cell piece, the metallic copper wire is not in contact with the first cell piece and the second cell piece.

In other alternative embodiments, conductive structure 280 is a conductive tape. The upper and lower sides of the conductive structure 280 are both sides in the thickness direction of the conductive tape, i.e., the upper and lower surfaces of the conductive tape, respectively. The width of the conductive adhesive tape is smaller than the distance between the first battery piece and the second battery piece; when the conductive tape is arranged in the gap between the first cell piece and the second cell piece, the conductive tape is not in contact with the first cell piece and the second cell piece; in other words, the conductive structure 280 does not contact the first and second battery cells.

In embodiments where the conductive structure 280 is a conductive tape, the height of the conductive tape may be between 0.8 and 1.5 times the thickness of the cell sheet, specifically, for example, 0.2 mm; in practical application, the height of the conductive adhesive tape does not exceed 1cm at most.

The length of the conductive structure 280 is, for example, equal to the distance between two main grids at the edge of the cell, and if the number of the main grids on one cell is 9, the length of the conductive structure 280 is equal to the distance between the 1 st and 9 th main grids; in other embodiments, the length of the conductive structure 280 may be equal to or slightly greater than the length of the battery cell in the second direction.

In some alternative embodiments, the solder strips further include a third set of solder strips (reference 263 in fig. 1 b), the third set of solder strips including a plurality of solder strips; the plurality of solder strips in the third group of solder strips are arranged on the positive electrode of the second battery piece 220 at intervals, and one side facing the first battery piece 210 is disconnected with each first portion 2611 of the plurality of solder strips in the corresponding first group of solder strips 261.

In some alternative embodiments, the first cell piece 210 and the second cell piece 220 are both cell pieces having a main grid;

a plurality of solder strips in the first set of solder strips 261 are arranged on the positive electrode of the first battery piece 210 at intervals, specifically, the plurality of solder strips in the first set of solder strips 261 are respectively aligned with each main grid of the positive electrode of the first battery piece 210;

the plurality of solder strips in the second group of solder strips 262 are arranged on the negative electrode of the second battery piece 220 at intervals, and specifically, the plurality of solder strips in the second group of solder strips 262 are respectively aligned with the main grids of the negative electrode of the second battery piece 220.

In some alternative embodiments, the first cell piece 210 and the second cell piece 220 are both cell pieces without main grids, i.e., the number of main grids is equal to 0;

a plurality of welding strips in the first group of welding strips 261 are arranged on the positive electrode of the first battery piece 210 at intervals, specifically, a plurality of welding strips in the first group of welding strips 261 are arranged on the positive electrode of the first battery piece 210 at equal intervals;

the plurality of solder strips in the second group of solder strips 262 are arranged on the negative electrode of the second battery piece 220 at intervals, specifically, the plurality of solder strips in the second group of solder strips 262 are arranged on the negative electrode of the second battery piece 220 at intervals.

Fig. 2 is a schematic structural diagram of a photovoltaic series welding apparatus provided in an embodiment of the present application, and as shown in fig. 2, the photovoltaic series welding apparatus includes: the device comprises a cutter mechanism 100, a battery piece to be welded (a first battery piece 210 is taken as an example in the figure), a rack 300, a material box mechanism 400, a conductive structure loading mechanism 600, a welding mechanism 700, a heating mechanism 710, a welding platform 720, a metal adsorption mechanism 730, a first manipulator 810, a second manipulator 820, a conveyor belt 830, an operating computer 850 and a discharging mechanism 900.

The frame 300 includes a feed end and a discharge end; the material box mechanism 400 is positioned at the feeding end of the frame 300 and is used for accommodating the battery pieces to be welded; a solder strip loading mechanism (not shown in FIG. 2 for perspective reasons) located on the frame 300 for loading solder strip; a conductive structure loading mechanism 600, located on the rack 300, for loading a conductive structure; the welding mechanism 700 is positioned on the frame 300 and between the feeding end and the discharging end and is used for welding the battery plate and the welding strip and welding the conductive structure and the welding strip; the cutter mechanism 100 is positioned on the frame 300 and is arranged adjacent to the welding mechanism 700 and used for cutting off the welding strip; a second robot 820 which is movable at least between the conductive structure loading mechanism 600 and the soldering mechanism 700, and which takes out the conductive structure from the conductive structure loading mechanism 600 and moves the taken out conductive structure to the soldering mechanism 700; and the discharging mechanism 900 is positioned at the discharging end of the frame 300.

The photovoltaic series welding equipment provided by the embodiment of the application can meet the production requirements of components of battery pieces of different types, different specifications and different sizes, and the application range is greatly expanded; moreover, a plurality of battery pieces can be welded simultaneously, so that the production efficiency is improved, the productivity is correspondingly improved, and the production cost is reduced; by additionally arranging the conductive structure loading mechanism, the manipulator can move between the conductive structure loading mechanism and the welding mechanism to take out the conductive structure from the conductive structure loading mechanism and place the conductive structure on the welding mechanism, so that the conductive structure is used in a series welding process, and current carriers are led out better.

The photovoltaic series welding equipment provided by the embodiment of the application is mainly used for preparing the photovoltaic assembly in the embodiment.

In the following, a process of manufacturing a photovoltaic module using the photovoltaic series welding apparatus will be specifically described with reference to specific examples.

First, a plurality of battery pieces are put into the magazine mechanism 400.

Next, the running program can be started by operating the computer 850, and the mechanisms in the control device can perform series welding on the plurality of battery pieces.

Specifically, first robot 810 draws X strips of solder ribbon, X >1, each having a length L > the sum of the lengths of the N cells to be series-welded, flat onto welding platform 720 in welding mechanism 700, formed as a lower solder ribbon layer (a group of lower solder ribbons 62 is referred to herein as a "lower solder ribbon layer").

The first manipulator 810 sucks N battery pieces to be series-welded from the magazine mechanism 400, puts each battery piece on the conveyor belt 830, and conveys the battery pieces to the welding platform 720 through the conveyor belt 830, and the N battery pieces to be series-welded are arranged on the welding platform 720 (specifically on the X welding strips) at a certain distance, and the distance is greater than 0 mm. For a cell with a main grid (i.e. a metal electrode), the main grid of the cell needs to be aligned with each solder strip in the X solder strips; for the cells without the main grids, namely the number of the main grids is equal to 0, the welding strips are only required to be arranged at equal intervals.

Here, the battery pieces may be placed with reference to fig. 1a, that is, all the battery pieces may be placed with the positive and negative electrodes facing the same direction according to actual needs, for example, all the battery pieces may be placed with the positive electrode facing upwards and the back electrode facing downwards, or all the battery pieces may be placed with the back electrode facing upwards and the positive electrode facing downwards.

After the battery piece is put, in order to avoid the battery piece to move in subsequent operation, can also fix the battery piece under the effect of suction by opening vacuum adsorption mechanism 730. It should be understood that the suction position of the vacuum suction mechanism 730 on the cell should be a position below the cell where it is not in contact with the downbond tape.

Next, the second manipulator 820 grabs a conductive structure, which may be a metal copper wire or a conductive adhesive tape, from the conductive structure loading mechanism 600; accordingly, the conductive structure loading mechanism 600 may be embodied as a wire box. After the second manipulator 820 grasps the conductive structure, the conductive structure is placed between two adjacent battery pieces, i.e. in the gap between the two adjacent battery pieces, and is not in contact with any battery piece.

Starting the welding mechanism 700, and welding the battery piece to the lower welding belt layer under the heating action of the heating assembly 710 in the welding mechanism 700; accordingly, in embodiments that include a conductive structure, the conductive structure is also soldered to the lower solder ribbon layer. Wherein the temperature of the soldering is, for example, less than 300 degrees celsius. The step of turning on the heating element 710 is not limited to be performed after the battery plate is placed and/or the conductive structure is placed, the order of the steps is not strictly limited in the embodiment of the present application, and the heating element 710 may be turned on in an earlier step.

In practice, the lower solder ribbon layer and the battery cell body are disposed on a conveyor belt, for example, and the heating assembly 710 heats the conveyor belt to form the heating platform.

After the welding is completed, the heating assembly 710 is turned off. The welding mechanism 700 slowly presses down to secure the solder strip, the cutter mechanism 100 is opened, the cutter head is opened, the press-cutting position is shown as "x" in fig. 1a, the heating platform (which may be a conveyor belt in practical application) serves as a force application platform for cutting the solder strip 62. The cutter head is then retracted.

Next, it is necessary to arrange the upper solder ribbon 61 on the battery piece, and to perform press-cutting of the upper solder ribbon 61. The embodiment of the application provides two implementation modes.

As one implementation mode, the conveyer belt carries the battery piece to move rightwards, namely to the direction of the cutter mechanism 100; the bisection platform in the cutter mechanism 100 is slowly moved above the conductive structure 280 and is further moved a distance to be positioned between the conductive structure 280 and the battery piece, so as to prepare for cutting off the upper solder strip layer (a group of upper solder strips formed by the plurality of upper solder strips 61 is referred to as an "upper solder strip layer"); the second robot 820 again pulls the X strips of solder strip as an upper solder strip layer, laying them on the bisecting platform in alignment with the lower solder strip layer. The welding mechanism 700 is turned on, and the upper welding strip layer is welded to the conductive structure 280 and to the electrode of the battery cell under the heating action of the heating assembly 710. Wherein the temperature of the welding can also be less than 300 ℃. Next, the cutter head 130 is opened, moved to above the bisecting platform 140, adjusted in height to be aligned with the bisecting platform 140, and the upper tape layer is cut off as indicated by "x" in fig. 1a, showing the press-cutting position; thus, a series-connected battery string structure is formed.

As another implementation, the second robot 820 is controlled to pull the X solder strips again, and the X solder strips are laid on the bisection platform 140 as the upper solder strip layer and aligned with the lower solder strip layer. The welding mechanism 700 is turned on, and the upper welding strip layer is welded to the conductive structure 280 and to the electrode of the battery cell under the heating action of the heating assembly 710. Wherein the temperature of the welding can also be less than 300 ℃. The bisecting platform is then actuated to insert into position between the conductive structure 280 and the cell piece in preparation for severing the upper solder ribbon layer. Driving the cutter head to move above the bisection platform, and clamping the upper welding strip to be cut between the cutter head and the bisection platform; and driving the cutter head to move downwards to cut the upper welding belt layer to form a group of battery string structures connected in series.

And finally, driving the cutter head and the cutting platform to slowly translate to leave the battery string structure. After the battery string structure is conveyed to the discharging end position by the conveyor belt 830, the welded and pressed battery string structure is taken out by the discharging mechanism 900 and placed on a finished product table.

And repeating the process to manufacture a plurality of groups of battery strings. Then, the other processes of component preparation are continued: typesetting, laminating, edging, framing, wiring box mounting, cleaning, testing and packaging, and finally preparing the required component. Therefore, the photovoltaic series welding equipment provided by the embodiment of the application is adopted to carry out series welding on the cell pieces, and the production efficiency of the assembly can be greatly improved.

In the photovoltaic series welding device provided by the embodiment of the present application, in order to operate more reasonably, the conductive structure loading mechanism 600 may be specifically located on the rack 300 and between the magazine mechanism 400 and the welding mechanism 700. More specifically, the conductive structure loading mechanism 600, the welding mechanism 700, and the cutter mechanism 100 are sequentially disposed between the feed end and the discharge end of the frame 300. The second robot 820 is movable at least between the conductive structure loading mechanism 600 and the soldering mechanism 700, and is configured to take out the conductive structure 280 from the conductive structure loading mechanism 600 and move the taken out conductive structure 280 to the soldering mechanism 700.

Be applied to cutter mechanism among the photovoltaic stringer that this application embodiment provided can be different from the cutter mechanism among the correlation technique. Fig. 3 is a schematic perspective view of a cutter mechanism according to an embodiment of the present disclosure; FIG. 4 is an enlarged schematic view of the structure of the cutter and the bisection platform in the cutter mechanism; referring to fig. 3 and 4, the cutter mechanism 100 includes: a cutting blade holder 110, a driving element 120, a plurality of cutting blades 130, and a plurality of bisecting platforms 140; wherein, a plurality of cutters 130 are arranged in parallel, and a gap is arranged between two adjacent cutters 130; and a driving member 120 on the cutter holder 110 for driving the plurality of cutters 130 to simultaneously move in the vertical direction and also for driving the plurality of bisecting platforms 140 to simultaneously move in the vertical direction and/or simultaneously move in the horizontal direction. According to the photovoltaic series welding equipment, the photovoltaic series welding equipment is not required to be integrally transformed, the cutter mechanism provided by the embodiment of the application is only required to be adopted in the photovoltaic series welding equipment, different positions on a welding strip can be cut simultaneously, the series welding efficiency is improved through adjustment of a cutting mode of the welding strip, the productivity is improved, and the production cost is reduced. In addition, can also greatly reduce the piece that the stress that the extrusion of welding strip to the battery piece caused among the traditional series welding equipment arouses, this application can reduce welding process's piece rate, improves the yield.

Next, with continuing reference to fig. 3 and 4, the cutter mechanism provided in the embodiments of the present application will be further explained.

The cutter 130 is detachably connected to the cutter mechanism. Before cutting operation, the number of the required cutters can be determined according to the number of the battery pieces required to be connected in series, and the cutters are mounted or dismounted on the cutter mechanism according to the number of the required cutters; in practical application, the installation position covers most of the battery pieces with the main grids and most of the battery pieces with the sizes.

In order to facilitate the bearing of the compressive cutting forces, the material of the bisecting platform may be selected from metal, and thus the bisecting platform may also be referred to as a metal table.

The number of cutting platforms may be less than or equal to the number of cutters.

In an alternative embodiment, each cutter 130 includes a plurality of cutter heads 131; the plurality of cutters 130 are sequentially arranged at intervals along the first direction; a plurality of cutter heads 131 in one cutter 130 are sequentially arranged at intervals along the second direction; the first direction and the second direction are perpendicular to each other.

As will be appreciated, the plurality of cutter heads 131 are used to crush-cut a plurality of solder ribbons disposed on one of the surfaces of a piece of battery sheet, respectively. The number of the cutter heads 131 in one cutter 130 is equal to or greater than the number of the solder strips to be soldered on one of the surfaces of one cell. As shown in the enlarged view on the right side of fig. 4, each of the cutters 130 may further include a cross beam 132, and a plurality of cutter heads 131 are connected to the cross beam 132; the driving element 120 is specifically configured to drive the beam 132 to move in the vertical direction to move the cutter head 131. In other words, the cutter head 131 is connected with the drive element 120 via the cross beam 132. The cutter heads 131 are connected to the cross beam 132, so that the heights of the cutter heads 131 are the same in the moving process, and cutting of a plurality of welding strips on the same plane is better realized.

In order to meet the welding requirements of different battery pieces, the distance between the plurality of cutter heads 131 in one cutter 130 is adjustable. As can be understood, for a cell without a main grid, a plurality of solder strips in each set of upper solder strips/lower solder strips are arranged on the electrodes of the corresponding cell at equal intervals; for the battery piece with the main grids, the plurality of welding strips in each group of upper welding strips/lower welding strips are respectively aligned with the main grids of the electrodes of the corresponding battery piece. The installation position of the cutter 130 covers most of the battery pieces with the main grid and most of the battery pieces with the size, a corresponding number of cutter heads 131 can be installed according to the requirement, and all the cutters 130 are moved downwards after the cutter heads 131 with the determined number are installed.

As can be seen in conjunction with fig. 1a, 1b and 1c, the driving element 120 in the present embodiment may be used at least to perform a first driving operation and a second driving operation; corresponding to the first driving operation, the driving element 120 is configured to drive at least a portion of the cutting knife 130 to move downward in the vertical direction to the first height position and then move upward; corresponding to the second driving operation, the driving element 120 drives at least a portion of the cutting knife 130 to move downward in the vertical direction to the second height position and then move upward; the driving element 120 is further configured to drive at least a portion of the plurality of bisecting platforms 140 to move in a vertical direction and/or a horizontal direction at the same time, and to move the at least a portion of the bisecting platforms to have the upper surfaces located at a second height position; wherein the second height is higher than the first height. Here, the first height may specifically be the height of a platform carrying the battery piece and the downwelded tape; and the second height may be equal to or less than the height of the lower surface of the upper solder strip and at least greater than the height of the upper surface of the lower solder strip.

In some alternative embodiments, corresponding to the first driving operation, at least part of the cutters driven by the driving element 120 are the first set of cutters; in response to the second driving operation, at least a portion of the cutters driven by the driving element 120 are a second set of cutters; each cutter included in the first group of cutters is different from each cutter included in the second group of cutters; the horizontal position of each cutter included in the first group of cutters in the first driving operation is different from the horizontal position of each cutter included in the second group of cutters in the second driving operation. Here, the first group of cutters is referred to as a lower cutter, for example, and the lower cutter is used for realizing press cutting of the lower welding wire; the second group of cutters is for example called upper cutters, which are used to effect a press cut of the upper weld line. Through dispose upper cutter and lower cutter respectively, can drive corresponding cutter in first drive operation and second drive operation and implement the pressure respectively and cut, the pressure is cut fastly more, and efficiency is higher.

In further alternative embodiments, at least some of the cutters corresponding to the drive of the first drive operative drive element 120 are identical to at least some of the cutters corresponding to the drive of the second drive operative drive element 120; each of the cutting blades included in at least some of the cutting blades is located at a different horizontal position in the first driving operation than in the second driving operation. It will be appreciated that the separate pinch cutting of the upper and lower wires is achieved by controlling the same cutter to move to different positions in different drive operations; through this embodiment, need not to set up a plurality of cutters, saved equipment cost.

In the embodiment of the present application, the cutting edge of the cutter head 131 faces downward, and the cutter 130 moves in the vertical direction to make the cutter head 131 cut the solder strip 260 by press cutting.

It is understood that the present embodiment is not limited thereto, and the edge of the cutter head 131 may be upward or sideways; in a specific application, the cutter 130 can cut the solder strip 260 from below in a vertical direction after moving to cut, or can cut the solder strip 260 from left to right in a horizontal direction. For example, after the cutting edge of the cutter head 131 faces to the side surface and the cutter 130 is translated from the side surface of the battery piece to the cutting position, the cutter head 131 is aligned with the solder strip to be cut, and the solder strip 260 is directly cut off by moving left and right.

In order to be suitable for series welding of battery plates with different sizes and specifications, in the cutter mechanism provided in the embodiment of the present application, the driving element 120 may further drive at least a portion of the plurality of cutters 130 to move in the horizontal direction, so as to increase or decrease the distance between two adjacent cutters.

It is understood that the distance between two adjacent cutters may be equal to the sum of the dimension of the battery piece along the serial connection direction (i.e. the first direction) and the distance between two adjacent battery pieces; or equal to twice of the sum of the dimension of the battery piece along the serial connection direction (namely the first direction) and the distance between two adjacent battery pieces.

It should be understood by those skilled in the art that various features of the above embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A photovoltaic module, comprising:

2. The photovoltaic module of claim 1, wherein the upper and lower sides of the conductive structure are both sides of the conductive structure in a radial direction; the conductive structure axially spans each first portion of the plurality of solder strips in the first set of solder strips.

3. The photovoltaic module of claim 2 wherein the conductive structure is a metallic copper wire.

4. The photovoltaic module of claim 1, wherein the conductive structure is a conductive tape.

5. The photovoltaic module of claim 1, wherein the solder ribbon further comprises a third set of solder ribbons, the third set of solder ribbons comprising a plurality of solder ribbons;

6. The photovoltaic module of claim 1, wherein the first cell piece and the second cell piece are both cell pieces having a primary grid;

7. The photovoltaic module of claim 1, wherein the first cell piece and the second cell piece are both cell pieces without a main grid;

8. A photovoltaic series welding apparatus, comprising:

the device comprises a frame, a feeding device and a discharging device, wherein the frame comprises a feeding end and a discharging end;

the material box mechanism is positioned at the feeding end of the rack and used for accommodating the battery pieces to be welded;

the welding strip loading mechanism is positioned on the rack and used for loading a welding strip;

the cutter mechanism is positioned on the rack, is adjacent to the welding mechanism and is used for cutting off the welding strip;

a robot movable at least between the conductive structure loading mechanism and the soldering mechanism, for taking out a conductive structure from the conductive structure loading mechanism and moving the taken out conductive structure onto the soldering mechanism;

and the discharging mechanism is positioned at the discharging end of the rack.

9. The tandem photovoltaic welding apparatus of claim 8, wherein the conductive structure loading mechanism is located on the rack and between the magazine mechanism and the welding mechanism.

10. The photovoltaic series welding apparatus of claim 8, wherein the conductive structure loading mechanism, the welding mechanism, and the cutter mechanism are arranged in sequence between the feed end and the discharge end.