CN113814614A - Battery string welding equipment and welding method - Google Patents

Battery string welding equipment and welding method Download PDF

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Publication number
CN113814614A
CN113814614A CN202111142830.4A CN202111142830A CN113814614A CN 113814614 A CN113814614 A CN 113814614A CN 202111142830 A CN202111142830 A CN 202111142830A CN 113814614 A CN113814614 A CN 113814614A
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CN
China
Prior art keywords
welding
battery
strip
laid
pieces
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CN202111142830.4A
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Chinese (zh)
Inventor
季斌斌
徐青
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Wuxi Autowell Technology Co Ltd
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Wuxi Autowell Technology Co Ltd
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Priority to CN202111142830.4A priority Critical patent/CN113814614A/en
Publication of CN113814614A publication Critical patent/CN113814614A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a battery string welding device and a welding method, wherein the battery string welding device comprises a welding bearing device, a battery piece laying device, a welding strip laying device, a welding device and a welding strip cutting device, wherein: the battery piece laying device lays the battery pieces on the welding carrying device, so that the polarities of electrode rows of adjacent battery pieces on the same straight line are opposite; the welding strip laying device lays the welding strips on the battery pieces according to the laying direction of the battery pieces, so that electrode arrays of the battery pieces on the same straight line are covered by the same welding strip; welding the welding strip on the battery piece by the welding device; the welding strip cutting device is used for cutting off a plurality of welding strips between adjacent battery pieces. The battery string welding equipment provided by the invention has the advantages that all the laid battery pieces are welded by the long welding strips, and then the welding strips of the adjacent battery pieces are cut off according to rules to form the battery strings which are connected in series.

Description

Battery string welding equipment and welding method
Technical Field
The invention relates to the field of battery production, in particular to a battery string welding device and a welding method.
Background
The front side of the back contact battery piece is not provided with the main grid line, and the positive electrode and the negative electrode are arranged on the back side of the battery piece, so that the shading of the battery piece is reduced, and the light conversion efficiency of the battery piece is improved.
At present, welding strips are generally adopted to weld back contact battery plates into strings. In a conventional welding mode, a welding strip is generally cut into small sections in advance, and then the welding strip sections are welded between adjacent back-contact battery cells. The traditional welding mode has low welding efficiency.
Disclosure of Invention
In order to solve the technical problem, the invention provides a battery string welding device which adopts the following technical scheme:
the utility model provides a battery cluster welding equipment for weld the battery piece into the cluster, the back of battery piece is equipped with opposite polarity's first electrode and second electrode, first electrode becomes to be listed as and sets up and form two at least first electrode row, the second electrode becomes to be listed as and sets up and form two at least second electrode row, first electrode row and second electrode row are crisscross to be arranged, battery cluster welding equipment includes that the welding bears the weight of the device, battery piece laying device, welds the area laying device, welding set and welds the area cutting device, wherein:
the battery piece laying device is used for laying the back surfaces of the battery pieces on the welding carrying device upwards so that the polarities of electrode arrays of adjacent battery pieces on the same straight line are opposite;
the welding strip laying device is used for laying a plurality of welding strips on the battery pieces according to the laying direction of the battery pieces, so that electrode rows of the battery pieces which are positioned on the same straight line are covered by the same welding strip;
the welding device is used for welding the welding strip on the welding bearing device on the covered battery piece;
the welding strip cutting device is used for cutting a plurality of welding strips between adjacent battery pieces, so that battery strings which are connected in series are formed.
The battery string welding equipment provided by the invention has the advantages that all the laid battery pieces are welded by the long welding strips, and then the welding strips of the adjacent battery pieces are cut off according to rules to form the battery strings which are connected in series.
In some embodiments, the laid ith cell piece is rotated 180 ° relative to the laid (i-1) th cell piece, wherein i is a natural number greater than 1.
The adjacent battery pieces are laid by rotating 180 degrees, so that the opposite electrode rows of the adjacent battery pieces can be ensured to be positioned on the same straight line.
In some embodiments, the solder ribbon cutting device cuts off all odd-numbered solder ribbons between the ith cell and the (i-1) th laid cell and all even-numbered solder ribbons between the ith cell and the (i + 1) th laid cell for the ith laid cell, or the solder ribbon cutting device cuts off all even-numbered solder ribbons between the ith cell and the (i-1) th laid cell and all odd-numbered solder ribbons between the ith cell and the (i + 1) th laid cell for the ith laid cell, wherein i is a natural number greater than 1.
The welding strips among the battery pieces are cut off in an odd/even alternating mode, so that the battery pieces can be ensured to form battery strings which are connected in series.
In some embodiments, the solder strip cutting device comprises a first cutting mechanism, wherein the first cutting mechanism moves along the laying direction of the battery pieces and sequentially cuts all the even number of solder strips or all the even number of solder strips between every two adjacent battery pieces; or the solder strip cutting device comprises a third cutting mechanism and a fourth cutting mechanism which are arranged side by side, the third cutting mechanism and the fourth cutting mechanism synchronously move along the laying direction of the battery piece, and the fourth cutting mechanism cuts all the odd solder strips or all the even solder strips between the ith battery piece and the (i-1) th battery piece while cutting all the odd solder strips or all the even solder strips between the ith battery piece and the (i + 1) th battery piece; or the total number of the battery pieces laid on the welding bearing device is N, the welding strip cutting device comprises N-1 groups of fifth cutting mechanisms arranged side by side along the laying direction of the battery pieces, each group of the fifth cutting mechanisms correspondingly cuts off all odd welding strips or all even welding strips between one group of adjacent battery pieces, and N is a natural number greater than 3.
Three different solder strip cutting devices are provided, the three solder strip cutting devices cut the target solder strip between the adjacent battery pieces in different modes, wherein the third solder strip cutting device can cut the target solder strip between each group of adjacent battery pieces at one time, and the solder strip cutting efficiency is greatly improved.
In some embodiments, the solder ribbon cutting device is configured to cut a predetermined length of solder ribbon sections from or at the cutting location of the solder ribbon.
When the welding strip is cut off, the welding strip section with the preset length is cut off, so that the two welding strip cutting ends at the cutting-off position of the welding strip can be completely separated, and the short circuit caused by the contact of the two welding strip cutting ends is prevented.
In some embodiments, the battery string welding equipment further comprises a welding strip pressing device, and the welding strip pressing device is used for pressing the laid welding strip onto the battery piece.
Through setting up the solder strip closing device, can compress tightly the solder strip of laying well to the battery piece to guarantee the welding effect of solder strip, prevent the rosin joint.
In some embodiments, the solder strip pressing device comprises a positioning tool and a tool carrying part, wherein the tool carrying part is configured to carry the positioning tool onto the laid solder strip, and the positioning tool is used for pressing the solder strip onto the battery piece.
Through the cooperation of location frock and frock handling device, realize compressing tightly to the butt-weld area, and realized the recycling of location frock.
In some embodiments, the battery string welding apparatus further includes a solder ribbon bending device that bends the cut end of the cut solder ribbon after the solder ribbon cutting device cuts the solder ribbon.
Through setting up the solder strip and pushing away curved device, after accomplishing cutting off of solder strip, push away curved through the end of cutting off of the solder strip that will be cut off to guarantee that two solder strips of solder strip cutting off department cut off the end and part completely, prevent that two solder strips from cutting off the end contact and causing the short circuit.
In some embodiments, the welding carrier device includes a spacing adjustment stage and a plurality of stages, wherein: the plurality of bearing tables are arranged on the interval adjusting machine table, and each bearing table is paved with a battery piece; the spacing adjusting machine table is used for adjusting the spacing between the bearing tables; before the welding strip cutting device cuts off the welding strip, the distance between the bearing tables is a first distance; after the welding strip cutting device cuts off the welding strip, the distance between the bearing tables is adjusted to be the second distance by the distance adjusting machine table, wherein the second distance is larger than the first distance.
Through setting the welding bearing device into the interval adjusting machine table and the bearing table, after the welding strip is cut off, the interval between each battery piece is enlarged through the interval adjusting machine table, so that the two welding strip cutting ends at the cut-off part of each welding strip are completely separated, and the two welding strip cutting ends are prevented from being contacted to cause short circuit.
In some embodiments, the distance adjusting machine comprises a base plate, a plurality of sliders slidably connected to the base plate, and a slider driving mechanism, wherein: the sliding block driving mechanism is used for driving the sliding blocks to slide on the bottom plate so as to adjust the distance between the sliding blocks; each slide block is provided with a bearing platform.
The utility model provides a simple structure's interval adjustment board, it has realized the interval adjustment between each plummer.
In some embodiments, a solder strip pad is disposed on the bearing surface of the solder carrier. After the battery piece laying device lays the battery pieces on the welding bearing device, the welding strips between the adjacent battery pieces are all located on the welding strip gasket. A cutter of the solder strip cutting device cuts down toward the solder strip pad to cut off the solder strip.
Through setting up the solder strip gasket for solder strip between the adjacent battery piece all bears on the solder strip gasket, thereby makes things convenient for solder strip cutting device's cutter to carry out the mechanical cutting off to the solder strip.
In some embodiments, the weld bead severing device is an ultrasonic or laser severing device.
The ultrasonic or laser cutting device can further improve the welding effect.
The invention also provides a cell string welding method, which is used for welding cell sheets into a string, wherein the back of each cell sheet is provided with a first electrode and a second electrode with opposite polarities, the first electrodes are arranged in a row and form at least two first electrode rows, the second electrodes are arranged in a row and form at least two second electrode rows, and the first electrode rows and the second electrode rows are arranged in a staggered manner, and the cell string welding method comprises the following steps:
and laying the back surfaces of the battery pieces on the welding carrying device upwards so that the polarities of the electrode columns of the adjacent battery pieces on the same straight line are opposite.
And laying a plurality of welding strips on the battery pieces according to the laying direction of the battery pieces, so that the electrode rows of the battery pieces which are positioned on the same straight line are covered by the same welding strip.
And welding the welding strip on the covered battery piece.
And cutting off a plurality of welding strips between the adjacent battery pieces so as to form the battery strings which are connected in series.
The battery string welding method provided by the invention has the advantages that all the laid battery pieces are welded by the long welding strips, and then the welding strips of the adjacent battery pieces are cut off according to rules to form the battery strings which are connected in series.
In some embodiments, the laid ith cell piece is rotated 180 ° relative to the laid (i-1) th cell piece, wherein i is a natural number greater than 1.
The adjacent battery pieces are laid by rotating 180 degrees, so that the opposite electrode rows of the adjacent battery pieces can be ensured to be positioned on the same straight line.
In some embodiments, for the laid ith cell, all odd numbered solder tapes between the ith cell and the laid i-1 th cell are cut off, and all even numbered solder tapes between the ith cell and the laid i +1 th cell are cut off, or for the laid ith cell, the solder tape cutting device cuts all even numbered solder tapes between the ith cell and the laid i-1 th cell and all odd numbered solder tapes between the ith cell and the laid i +1 th cell, wherein i is a natural number greater than 1.
The welding strips among the battery pieces are cut off in an odd/even alternating mode, so that the battery pieces can be ensured to form battery strings which are connected in series.
In some embodiments, after laying the plurality of solder ribbons on the battery sheets in the laying direction of the battery sheets, the battery string welding method further includes: and pressing the solder strip on the battery piece.
The laid welding strip is pressed onto the battery piece, so that the welding effect of the welding strip is ensured, and the cold joint is prevented.
Drawings
Fig. 1 is a structural diagram of a back-connected battery cell in an embodiment of the invention;
FIG. 2 is a schematic diagram of the laying of four continuous battery pieces in the embodiment of the invention;
fig. 3 is a schematic diagram of four consecutive battery pieces connected in series according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a weld carrier according to an embodiment of the present invention;
fig. 1 to 4 include:
a battery piece 100, a first electrode row 101, a second electrode row 102;
a solder strip 200, a first cut end 31, a second cut end 32;
a welding bearing device 30, a spacing adjusting machine 31, a bearing table 32, a bottom plate 311 and a slide block 312.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In a traditional battery string welding mode, a welding strip is generally cut into small sections in advance, and then the welding strip sections are welded between adjacent back contact battery pieces. The traditional welding mode has low welding efficiency.
In view of the above, the invention provides a battery string welding device and a welding method, so as to weld battery pieces into a string.
The welded cell of the present invention is a back-connected cell, and as shown in fig. 1, a cell 100 of this type is provided with first electrodes (e.g., positive electrodes) and second electrodes (e.g., negative electrodes) having opposite polarities on the back surface thereof, the first electrodes are arranged in rows and form at least two first electrode rows 101, the second electrodes are arranged in rows and form at least two second electrode rows 102, and the first electrode rows 101 and the second electrode rows 102 are arranged in a staggered manner.
The cell 100 illustrated in fig. 1 includes three first electrode columns 101 and three second electrode columns 102, each first electrode column 101 and each second electrode column 102 respectively include four first electrodes and four second electrodes, and of course, in the cell 100 actually produced, the number of the first electrode columns 101 and the second electrode columns 102 may be more than three, and the number of the first electrodes and the second electrodes included in each first electrode column 101 and each second electrode column 102 may also be more than four.
The following describes an example of a battery string welding apparatus and a battery string welding method according to the present invention with two embodiments.
First embodiment
The battery cluster welding equipment that this embodiment provided includes that the welding bears device, battery piece laying device, welds area laying device, welding set and welds and take cutting device, wherein:
as shown in fig. 2, the cell sheet laying device is used for laying the cell sheets 100 on the welding carrier device with the back surfaces facing upwards, so that the electrode columns of adjacent cell sheets 100 on the same line have opposite polarities.
As shown in fig. 3, the solder strip laying device is used for laying a plurality of solder strips 200 on the battery pieces 100 in the laying direction of the battery pieces 100, so that the electrode rows of the battery pieces 100 located on the same line are covered by the same solder strip 200.
The welding device is used for welding the welding strip 200 on the welding carrying device on the covered battery piece 100;
the solder strip cutting device is used for cutting a plurality of solder strips between the adjacent battery pieces 100, so as to form a battery string which is connected in series.
It should be noted that, as an example, the battery string shown in fig. 2 and 3 includes only four battery plates, and in the actual production process, the battery string may be formed by welding a greater number of battery plates,
it can be seen that the battery string welding device provided by the embodiment welds all the laid battery pieces by using the long welding strips, and then cuts off the welding strips of each adjacent battery piece according to the rule so as to form the battery string connected in series. Compared with the traditional battery string welding mode, the battery string welding equipment provided by the embodiment greatly reduces the welding workload and improves the welding efficiency.
Optionally, in order to ensure that the opposite electrode rows of the adjacent battery pieces are located on the same straight line, the laid ith battery piece is horizontally rotated by 180 degrees relative to the laid (i-1) th battery piece, wherein i is a natural number greater than 1.
In the actual production process, all the battery pieces can be placed on the workbench along a straight line, and after the placement is completed, the ith battery piece horizontally rotates 180 degrees relative to the (i-1) th battery piece along the placement direction. Subsequently, the battery piece laying device directly lays the well-placed battery pieces one by one or at a time on the welding bearing device, and in the laying process, the battery piece laying device does not need to rotate the battery pieces.
Of course, the battery piece laying device can also be used for implementing 180-degree rotation of the battery pieces, namely, after the battery piece laying device finishes laying the ith-1 battery piece, the ith battery piece needs to be laid after rotating 180 degrees relative to the ith-1 battery piece.
Optionally, for the laid ith battery piece, the solder strip cutting device cuts off all odd number solder strips between the ith battery piece and the laid (i-1) th battery piece, and cuts off all even number solder strips between the ith battery piece and the laid (i + 1) th battery piece. Or, for the laid ith battery piece, the welding strip cutting device cuts off all even number welding strips between the ith battery piece and the laid (i-1) th battery piece, and cuts off all odd number welding strips between the ith battery piece and the laid (i + 1) th battery piece, wherein i is a natural number greater than 1.
For example, as shown in fig. 3, the target battery string includes four battery plates 100, the electrode columns on the battery plates 100 are six rows, and correspondingly, the number of the solder strips 200 is six. Optionally, three odd welding strips, namely the 1 st, the 3 rd and the 5 th welding strips, between the first battery piece and the second battery piece are cut off. And cutting three welding strips of the second number, namely the welding strips of the 2 nd, the 4 th and the 6 th between the second battery piece and the third battery piece. And three odd welding strips, namely the 1 st welding strip, the 3 rd welding strip and the 5 th welding strip, positioned between the third battery piece and the fourth battery piece are cut off.
It can be seen that the odd/even alternate cutting of the solder strips 200 between the battery pieces 100 can ensure that the battery pieces 100 form a battery string connected in series.
Alternatively, the solder strip cutting device may select the following three embodiments according to actual situations.
The first embodiment:
the welding strip cutting device comprises a first cutting mechanism which moves along the laying direction of the battery pieces and sequentially cuts off all the welding strips in an even number or all the welding strips in an even number between every two adjacent battery pieces. After the first cutting mechanism finishes cutting the target welding strip between the current adjacent battery pieces, the first cutting mechanism moves a first preset distance along the laying direction of the battery pieces, the first preset distance is approximately the length of one battery piece, so that the target welding strip between the next group of adjacent battery pieces is cut, and the process is repeatedly executed until the target welding strips between all the adjacent battery pieces are cut.
The solder ribbon cutting apparatus according to this embodiment is provided with only one set of cutting mechanism, and therefore, it is only possible to cut the target solder ribbon between a set of corresponding battery pieces at a time, and the solder ribbon cutting efficiency is not high. Of course, the solder strip cutting device has the advantages of simple structure and low cost.
The second embodiment:
the solder strip cutting device comprises a third cutting mechanism and a fourth cutting mechanism which are arranged side by side, the third cutting mechanism and the fourth cutting mechanism move synchronously along the laying direction of the battery piece, and when the third cutting mechanism cuts off all odd solder strips or all even solder strips between the ith battery piece and the (i-1) th battery piece, the fourth cutting mechanism cuts off all even solder strips or all odd solder strips between the ith battery piece and the (i + 1) th battery piece. And after the third cutting mechanism and the fourth cutting mechanism complete cutting off the target welding strips between the current two groups of adjacent battery pieces, synchronously moving the third cutting mechanism and the fourth cutting mechanism for a second preset distance along the laying direction of the battery pieces, wherein the second preset distance is approximately twice of the length of the battery pieces, so that the third cutting mechanism and the fourth cutting mechanism reach between the subsequent two groups of adjacent battery pieces to cut off the target welding strips between the subsequent two groups of adjacent battery pieces, and the steps are repeatedly executed until all the target welding strips between the adjacent battery pieces are cut off.
Compared with the first embodiment, the solder strip cutting device in the embodiment is provided with two sets of cutting mechanisms, which can cut the target solder strip between two adjacent sets of battery pieces synchronously, thereby improving the solder strip cutting efficiency.
Third embodiment:
the total number of the battery pieces laid on the welding bearing device is N, the welding strip cutting device comprises N-1 groups of fifth cutting mechanisms arranged side by side along the laying direction of the battery pieces, each group of the fifth cutting mechanisms correspondingly cuts off all odd welding strips or all even welding strips between one group of adjacent battery pieces, and N is a natural number larger than 3.
The solder strip cutting device in the present embodiment can cut off the target solder strip between all adjacent battery pieces at one time, thereby greatly improving the solder strip cutting efficiency.
In an actual production process, after the target solder strip between adjacent battery pieces 100 is cut by the solder strip cutting device, two solder strip cut ends (such as the first solder strip cut end 201 and the second solder strip cut end 202 in fig. 3) at the cut position are easily accidentally contacted due to the too close distance, so that a battery string is short-circuited.
To avoid short-circuit failure, the present embodiment provides three alternative solutions:
the first solution is:
the solder ribbon cutting device is configured to cut a solder ribbon section of a predetermined length from the cutting position of the solder ribbon 200, so that a distance equivalent to the length of the solder ribbon section is maintained between the first solder ribbon cut end 201 and the second solder ribbon cut end 202.
The second solution is:
and a special welding strip bending device is additionally arranged. After the welding strip cutting device cuts the welding strip at the cutting position of the welding strip, the welding strip bending pushing device immediately pushes and bends the cut end of the cut welding strip upwards or downwards, so that the two cut ends of the welding strip at the cut part of the welding strip are completely separated.
The third solution is:
as shown in fig. 4, the welding carrier 30 includes a spacing adjustment stage 31 and a plurality of stages 32, wherein: a plurality of bearing platforms 32 are arranged on the interval adjusting machine 31, and each bearing platform 32 is paved with a battery piece. That is, the cell sheet laying device lays the cell sheets on the carrier 32. The spacing adjusting machine 31 is used for adjusting the spacing between the bearing tables 32.
Before the solder strip cutting device cuts the solder strip, the spacing between the bearing tables 32 is a first spacing. After the welding strip cutting device cuts off the welding strip, the distance between the bearing platforms 32 is adjusted to be the second distance by the distance adjusting platform 31, wherein the second distance is larger than the first distance, so that two cutting ends of the welding strip at the cutting position of the welding strip can be completely separated.
Optionally, the spacing adjustment platform 31 includes a bottom plate 311, a plurality of sliders 312 slidably connected to the bottom plate 311, and a slider driving mechanism, wherein: the slide block driving mechanism is used for driving the plurality of slide blocks 312 to slide on the bottom plate so as to adjust the distance between the slide blocks 312, and each slide block 312 is provided with one bearing table 32.
It can be seen that, through the drive of the spacing adjustment machine table 31, after the welding strip is cut off, the spacing between each battery piece can be increased, so that the two welding strip cut-off ends at the cut-off position of each welding strip are completely separated.
In actual production, the second pitch is generally set to be equal to the target pitch between the adjacent battery pieces in the battery string after the welding is completed. For example, in some embodiments, the target spacing between adjacent cells within the welded battery string is 2 mm. Therefore, in these embodiments, the distance between the bearing platforms 32 may be adjusted to 1mm (i.e. the first distance), and after the solder strip cutting device cuts the solder strip, the distance between the bearing platforms 32 is adjusted to 2mm (i.e. the second distance) by the distance adjusting platform, so as to ensure that the two cut ends of the solder strip at the cut position of each solder strip are completely separated, and the distance between each adjacent battery piece is equal to the target distance.
In order to ensure that the solder strip can be welded tightly on the battery piece and prevent cold joint, optionally, the battery string welding device in this embodiment further includes a solder strip pressing device, and the solder strip pressing device is used for pressing the laid solder strip onto the battery piece. Optionally, the solder strip pressing device includes a positioning tool and a tool carrying portion, the tool carrying portion is configured to carry the positioning tool to the laid solder strip, and the positioning tool is used for pressing the solder strip onto the battery piece.
As described above, in the battery string welding apparatus of the embodiment, the battery pieces are firstly laid on the welding carrying device, and then the welding tapes are laid on the battery pieces, so that a gap corresponding to the thickness of the battery pieces exists between the welding tapes between the adjacent battery pieces and the carrying surface of the welding carrying device, that is, the welding tapes between the adjacent battery pieces are in a suspended state, and in this state, if a mechanical cutting mode is adopted, it is difficult for the cutter of the welding tape cutting device to effectively cut off the welding tapes. In view of this, optionally, in this embodiment, the carrying surface of the welding carrying device is provided with a solder strip pad. After the battery piece laying device lays the battery pieces on the welding bearing device, the welding strips between the adjacent battery pieces are supported on the welding strip gasket, so that the welding strips can be smoothly cut off by a cutter of the welding strip cutting device when the cutter is downwards cut towards the welding strip gasket.
Optionally, in the battery string welding apparatus in this embodiment, an ultrasonic wave or laser cutting device may also be used as the welding strip cutting device, so as to further improve the welding effect.
Second embodiment
The method for welding a battery string according to this embodiment may be implemented by the battery string welding apparatus according to the first embodiment, and specifically, the method for welding a battery string includes:
as shown in fig. 2, the cell plates are laid on the welding carrier with their back sides facing upwards, so that the electrode rows of adjacent cell plates lying on the same line have opposite polarities.
As shown in fig. 3, a plurality of solder strips are laid on the battery pieces in the laying direction of the battery pieces, so that the electrode rows of the battery pieces located on the same straight line are covered by the same solder strip.
And welding the welding strip on the covered battery piece.
And cutting off a plurality of welding strips between the adjacent battery pieces so as to form the battery strings which are connected in series.
In the battery string welding method provided by the embodiment of the invention, the long welding strips are used for welding all the laid battery pieces, and then the welding strips of each adjacent battery piece are cut off according to a rule so as to form the battery strings which are connected in series.
Optionally, in order to ensure that the opposite electrode rows of the adjacent battery pieces are located on the same straight line, the laid ith battery piece is horizontally rotated by 180 degrees relative to the laid (i-1) th battery piece, wherein i is a natural number greater than 1.
In the actual production process, all the battery pieces can be placed on the workbench along a straight line, and after the placement is completed, the ith battery piece horizontally rotates 180 degrees relative to the (i-1) th battery piece along the placement direction. Subsequently, the battery piece laying device directly lays the well-placed battery pieces one by one or at a time on the welding bearing device, and in the laying process, the battery piece laying device does not need to rotate the battery pieces.
Of course, the battery piece laying device can also be used for implementing 180-degree rotation of the battery pieces, namely, after the battery piece laying device finishes laying the ith-1 battery piece, the ith battery piece needs to be laid after rotating 180 degrees relative to the ith-1 battery piece.
Optionally, for the laid ith battery piece, the solder strip cutting device cuts off all odd number solder strips between the ith battery piece and the laid (i-1) th battery piece, and cuts off all even number solder strips between the ith battery piece and the laid (i + 1) th battery piece. Or, for the laid ith battery piece, the welding strip cutting device cuts off all even number welding strips between the ith battery piece and the laid (i-1) th battery piece, and cuts off all odd number welding strips between the ith battery piece and the laid (i + 1) th battery piece, wherein i is a natural number greater than 1.
For example, as shown in fig. 3, the target battery string includes four battery plates 100, the electrode columns on the battery plates 100 are six rows, and correspondingly, the number of the solder strips 200 is six. Optionally, three odd welding strips, namely the 1 st, the 3 rd and the 5 th welding strips, between the first battery piece and the second battery piece are cut off. And cutting three welding strips of the second number, namely the welding strips of the 2 nd, the 4 th and the 6 th between the second battery piece and the third battery piece. And three odd welding strips, namely the 1 st welding strip, the 3 rd welding strip and the 5 th welding strip, positioned between the third battery piece and the fourth battery piece are cut off.
It can be seen that the odd/even alternate cutting of the solder strips 200 between the battery pieces 100 can ensure that the battery pieces 100 form a battery string connected in series.
Optionally, after the plurality of welding strips are laid on the battery pieces in the laying direction of the battery pieces, the welding strips are firstly pressed on the battery pieces and then welded.
It should be noted that various optional implementation manners in the foregoing first embodiment are also applicable to this embodiment, and are not described herein again.
The invention has been described above with a certain degree of particularity. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that come within the true spirit and scope of the invention are desired to be protected. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.

Claims (16)

1. The utility model provides a battery cluster welding equipment for weld the battery piece into the cluster, the back of battery piece is equipped with opposite polarity's first electrode and second electrode, first electrode becomes to be listed as and sets up and forms two at least first electrode row, the second electrode is listed as and sets up and forms two at least second electrode row, first electrode row with the second electrode row is crisscross to be arranged, its characterized in that, battery cluster welding equipment includes that the welding bears device, battery piece laying device, welds area laying device, welding set and welds area cutting device, wherein:
the battery piece laying device is used for laying the back surfaces of the battery pieces on the welding carrying device upwards so that the polarities of electrode columns of adjacent battery pieces on the same straight line are opposite;
the welding strip laying device is used for laying a plurality of welding strips on the battery pieces according to the laying direction of the battery pieces, so that electrode rows of the battery pieces on the same straight line are covered by the same welding strip;
the welding device is used for welding the welding strip on the welding bearing device on the covered battery piece;
the welding strip cutting device is used for cutting off a plurality of welding strips between adjacent battery pieces, so that battery strings which are connected in series are formed.
2. The battery string welding apparatus according to claim 1, wherein the laid ith cell piece is rotated by 180 ° with respect to the laid i-1 th cell piece, wherein i is a natural number greater than 1.
3. The battery string welding apparatus according to claim 1, wherein for the laid i-th cell, the solder ribbon cutting device cuts off all odd-numbered solder ribbons between the i-th cell and the laid i-1-th cell and all even-numbered solder ribbons between the i-th cell and the laid i + 1-th cell, or,
for the laid ith battery piece, the welding strip cutting device cuts off all even number welding strips between the ith battery piece and the laid (i-1) th battery piece, and cuts off all odd number welding strips between the ith battery piece and the laid (i + 1) th battery piece,
wherein i is a natural number greater than 1.
4. The battery string welding apparatus according to claim 3, wherein:
the welding strip cutting device comprises a first cutting mechanism, the first cutting mechanism moves along the laying direction of the battery pieces and sequentially cuts off all the welding strips in an even number or all the welding strips in an even number between every two adjacent battery pieces; alternatively, the first and second electrodes may be,
the welding strip cutting device comprises a third cutting mechanism and a fourth cutting mechanism which are arranged side by side, the third cutting mechanism and the fourth cutting mechanism synchronously move along the laying direction of the battery piece, and the fourth cutting mechanism cuts off all the odd welding strips or all the even welding strips between the ith battery piece and the (i-1) th battery piece while cutting off all the odd welding strips or all the even welding strips between the ith battery piece and the (i + 1) th battery piece; alternatively, the first and second electrodes may be,
the total number of the battery pieces laid on the welding bearing device is N, the welding strip cutting device comprises N-1 groups of fifth cutting mechanisms arranged side by side along the laying direction of the battery pieces, each group of the fifth cutting mechanisms correspondingly cut off all odd welding strips or all even welding strips between a group of adjacent battery pieces, and N is a natural number greater than 3.
5. The battery string welding apparatus according to claim 1, wherein the solder ribbon cutting device is configured to cut a solder ribbon section of a predetermined length from the solder ribbon cutting position or to cut the solder ribbon at the solder ribbon cutting position.
6. The battery string welding apparatus according to claim 1, further comprising a solder ribbon pressing device for pressing the laid solder ribbon onto the battery sheet.
7. The battery string welding device according to claim 6, wherein the welding strip pressing device comprises a positioning tool and a tool carrying portion, the tool carrying portion is configured to carry the positioning tool onto the laid welding strip, and the positioning tool is used for pressing the welding strip onto the battery piece.
8. The battery string welding apparatus according to claim 1, further comprising a solder ribbon bending device that bends a cut end of the cut solder ribbon after the solder ribbon cutting device cuts the solder ribbon.
9. The battery string welding apparatus of claim 1, wherein the welding carrying device comprises a spacing adjustment machine and a plurality of carrying tables, wherein:
the plurality of bearing tables are arranged on the interval adjusting machine table, and each bearing table is paved with a battery piece;
the distance adjusting machine table is used for adjusting the distance between the bearing tables;
before the welding strip cutting device cuts the welding strip, the distance between the bearing tables is a first distance;
after the welding strip cutting device cuts off the welding strip, the distance between the bearing tables is adjusted to be a second distance by the distance adjusting machine, wherein the second distance is larger than the first distance.
10. The battery string welding apparatus of claim 9, wherein the spacing adjustment stage comprises a base plate, a plurality of sliders slidably coupled to the base plate, and a slider driving mechanism, wherein:
the sliding block driving mechanism is used for driving the sliding blocks to slide on the bottom plate so as to adjust the distance between the sliding blocks;
each slider is provided with one plummer.
11. The battery string welding device according to claim 1, wherein a welding strip gasket is arranged on the bearing surface of the welding bearing device;
after the battery piece laying device lays the battery pieces on the welding bearing device, welding strips between adjacent battery pieces are all positioned on the welding strip gasket;
and a cutter of the welding strip cutting device cuts downwards towards the welding strip gasket to cut off the welding strip.
12. The battery string welding apparatus according to claim 1, wherein the welding ribbon cutting device is an ultrasonic or laser cutting device.
13. A cell string welding method for welding cell pieces into a string, the back surfaces of the cell pieces being provided with first electrodes and second electrodes having opposite polarities, the first electrodes being arranged in rows and forming at least two first electrode rows, the second electrodes being arranged in rows and forming at least two second electrode rows, the first electrode rows and the second electrode rows being arranged in a staggered manner, the cell string welding method comprising:
laying the back surfaces of the battery pieces on a welding carrying device upwards to enable the polarities of electrode columns of adjacent battery pieces on the same straight line to be opposite;
laying a plurality of welding strips on the battery pieces according to the laying direction of the battery pieces, so that electrode rows of the battery pieces, which are positioned on the same straight line, are covered by the same welding strip;
welding the welding strip on the covered battery piece;
and cutting off a plurality of welding strips between the adjacent battery pieces so as to form the battery strings which are connected in series.
14. The method of welding a battery string according to claim 13, wherein the laid ith cell piece is rotated 180 ° with respect to the laid (i-1) th cell piece, wherein i is a natural number greater than 1.
15. The battery string welding apparatus according to claim 13, wherein for the laid ith cell, all odd numbered solder ribbons between the ith cell and the laid i-1 th cell and all even numbered solder ribbons between the ith cell and the laid i +1 th cell are cut off, or,
for the laid ith battery piece, the welding strip cutting device cuts off all even number welding strips between the ith battery piece and the laid (i-1) th battery piece, and cuts off all odd number welding strips between the ith battery piece and the laid (i + 1) th battery piece,
wherein i is a natural number greater than 1.
16. The battery string welding method according to claim 13, wherein after the laying of the plurality of welding tapes on the battery pieces in the laying direction of the battery pieces, the battery string welding method further comprises: and pressing the solder strip on the battery piece.
CN202111142830.4A 2021-09-28 2021-09-28 Battery string welding equipment and welding method Pending CN113814614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111142830.4A CN113814614A (en) 2021-09-28 2021-09-28 Battery string welding equipment and welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111142830.4A CN113814614A (en) 2021-09-28 2021-09-28 Battery string welding equipment and welding method

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114951882A (en) * 2022-07-11 2022-08-30 苏州沃特维自动化系统有限公司 IBC multi-group gate battery string welding method
CN115213508A (en) * 2022-07-11 2022-10-21 苏州沃特维自动化系统有限公司 IBC multi-group grid battery string integral welding method
CN116995144A (en) * 2023-09-26 2023-11-03 苏州小牛自动化设备有限公司 A press cluster frock buffer memory circulation system for preparing battery cluster

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114951882A (en) * 2022-07-11 2022-08-30 苏州沃特维自动化系统有限公司 IBC multi-group gate battery string welding method
CN115213508A (en) * 2022-07-11 2022-10-21 苏州沃特维自动化系统有限公司 IBC multi-group grid battery string integral welding method
CN115213508B (en) * 2022-07-11 2024-03-22 苏州沃特维自动化系统有限公司 Integral welding method for IBC multi-group grid battery strings
CN114951882B (en) * 2022-07-11 2024-03-22 苏州沃特维自动化系统有限公司 IBC multi-group grid battery string welding method
CN116995144A (en) * 2023-09-26 2023-11-03 苏州小牛自动化设备有限公司 A press cluster frock buffer memory circulation system for preparing battery cluster
CN116995144B (en) * 2023-09-26 2023-12-29 苏州小牛自动化设备有限公司 A press cluster frock buffer memory circulation system for preparing battery cluster

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