CN211708446U - Battery piece series welding equipment - Google Patents
Battery piece series welding equipment Download PDFInfo
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- CN211708446U CN211708446U CN201921795314.XU CN201921795314U CN211708446U CN 211708446 U CN211708446 U CN 211708446U CN 201921795314 U CN201921795314 U CN 201921795314U CN 211708446 U CN211708446 U CN 211708446U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a battery piece series welding device, which comprises a welding and conveying device, a battery piece feeding device, a welding strip feeding device, a pressure welding strip tool and a welding device; the width of the welding and conveying device is larger than the sum of the widths of the at least two battery pieces, so that at least two laying lines are formed on the welding and conveying device; the battery piece feeding device is positioned at a front station of the welding and conveying device and is used for laying battery pieces on at least two laying lines; the welding strip feeding device is positioned at a front station of the welding conveying device and is used for laying welding strips on at least two laying lines; the welding belt pressing tool tightly presses the battery pieces and the welding belts stacked on the welding conveying device; the welding conveying device conveys the stacked battery pieces and the welding strips to a welding station; and the welding device is used for welding the battery plate and the welding strip positioned on the welding station. The utility model provides a technical scheme can weld two at least battery strings in a welding process, improves the production efficiency of battery string greatly.
Description
Technical Field
The utility model belongs to photovoltaic cell production field especially relates to a battery piece series welding equipment.
Background
In the production process of the photovoltaic cell, a cell string is formed by welding a cell and a welding strip by using cell string welding equipment.
However, in the current series welding equipment, only one battery string can be series-welded at one time, so that the welding efficiency is low, and the production cycle of the battery assembly is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a battery piece cluster welding equipment to solve the problem of welding battery cluster inefficiency among the prior art.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the utility model provides a battery piece series welding device, which comprises a welding and conveying device, a battery piece feeding device, a welding strip feeding device, a pressure welding strip tool and a welding device;
the width of the welding and conveying device is larger than the sum of the widths of at least two battery pieces, so that at least two laying lines are formed on the welding and conveying device, and each laying line can accommodate one battery piece in the width direction of the welding and conveying device;
the battery piece feeding device is positioned at a front station of the welding and conveying device and is configured to lay battery pieces on at least two laying lines of the welding and conveying device;
the welding strip feeding device is positioned at a front station of the welding and conveying device, and welding strips are laid on the at least two laying lines of the welding and conveying device, so that the battery pieces and the welding strips are stacked and laid on each laying line of the welding and conveying device;
the welding belt tool is configured to compress the battery plates and the welding belts which are stacked on the welding conveying device;
the welding conveying device conveys the stacked battery pieces and the welding strips to the welding station;
and the welding device welds the battery piece and the welding strip positioned on the welding station to form a battery string.
Preferably, the battery piece feeding device comprises a battery piece processing device, a battery piece conveying device and a battery piece grabbing device, wherein the battery piece processing device is used for dividing a whole battery piece into at least two battery pieces and placing the divided battery pieces on the battery piece conveying device;
the battery piece grabbing device moves between the battery piece conveying device and the welding conveying device, and at least two battery pieces are grabbed from the battery piece conveying device at one time and are placed on the welding conveying device side by side.
Preferably, the cell processing device comprises a turntable mechanism capable of rotating to a feeding station, a detection station, a scribing station and a breaking station, a detection mechanism positioned at the detection station, a scribing mechanism positioned at the scribing station and a breaking mechanism positioned at the breaking station;
the turntable mechanism receives the loaded battery piece at the loading station and drives the battery piece to sequentially rotate to the detection station, the scribing station and the piece breaking station;
the detection mechanism detects the battery piece at the detection station;
the scribing mechanism is used for scribing the battery pieces at the scribing station according to the position detection of the detection mechanism on the battery pieces;
and the sheet breaking mechanism breaks the battery sheets at the sheet breaking station along the scribing line.
Preferably, the cell piece processing device further comprises a transfer mechanism, wherein the transfer mechanism is used for transferring the cell piece breaking mechanism so that the cell pieces broken by the cell piece breaking mechanism can be released onto the cell piece conveying device.
Preferably, the battery piece series welding equipment comprises two welding conveying devices, and the welding strip feeding device, the pressure welding strip tool and the welding device which are arranged corresponding to each welding conveying device;
the battery piece feeding device comprises two battery piece conveying devices, the battery pieces processed by the battery piece processing device are respectively placed on the two battery piece conveying devices, and the two battery piece conveying devices respectively correspond to one welding conveying device for feeding.
Preferably, the welding strip feeding device comprises a welding strip disc group for providing at least two groups of welding strips and welding strip traction and shearing devices respectively corresponding to one group of welding strips, each welding strip traction and shearing device pulls the corresponding welding strip, shears the welding strip with a preset length, and puts the welding strip with the preset length on the welding conveying device.
Preferably, the battery piece series welding equipment further comprises a tool returning device, and the tool returning device is used for returning the pressure welding strip tool to the initial pressing position of the welding and conveying device.
Preferably, the tooling loopback device comprises a tooling conveying mechanism, a moving mechanism and a tooling grabbing mechanism, wherein the moving mechanism moves the pressure welding strip tooling to the tooling conveying mechanism, the tooling conveying mechanism conveys the pressure welding strip tooling back, and the tooling grabbing mechanism grabs the pressure welding strip tooling conveyed by the tooling conveying mechanism to press the battery plate and the welding strip stacked on the welding conveying device.
Preferably, the welding device comprises a welding lamp box, and the welding lamp box radiates heat to weld the part to be welded;
or the welding device comprises a plurality of pressing pins arranged on a heated mounting plate, and the pressing pins acquire heat from the mounting plate and press the parts to be welded for welding.
The utility model provides a battery piece stringer can lay the battery piece of laying on the line and weld the area simultaneously and weld two at least of welding conveyor, can once produce two at least battery strings in a welding process promptly, has improved the production efficiency of battery string greatly.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a cell series welding apparatus according to an embodiment of the present invention.
Description of reference numerals:
1-welding a conveying device; 2-a cell feeding device; 21-cell processing device; 22-cell conveying device; 3-welding strip feeding device; 31-welding a band plate group; 32-a solder strip traction shearing device; 4, a welding device; 5, a tool returning device; 51-a tool conveying mechanism; 52-a moving mechanism; 6-laying the line.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may also be otherwise oriented, such as by rotation through 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.
The utility model provides a battery piece series welding device, as shown in figure 1, the battery piece series welding device comprises a welding and conveying device 1, a battery piece feeding device 2, a welding strip feeding device 3, a pressure welding strip tool (not explicitly shown in the figure) and a welding device 4;
the width of the welding and conveying device 1 is larger than the sum of the widths of at least two battery pieces, so that at least two laying lines 6 are formed on the welding and conveying device 1, and one battery piece can be accommodated in each laying line 6 in the width direction of the welding and conveying device 1;
the battery piece feeding device 2 is positioned at a front station of the welding and conveying device 1 and is configured to lay battery pieces on at least two laying lines 6 of the welding and conveying device 1;
the welding strip feeding device 3 is positioned at a front station of the welding and conveying device 1, and is used for laying welding strips on the at least two laying lines 6 of the welding and conveying device 1, so that battery pieces and the welding strips are stacked and laid on each laying line 6 of the welding and conveying device 1;
the welding strip tool is configured to compress the stacked battery plates and the welding strips on the welding conveying device 1;
the welding and conveying device 1 conveys the stacked battery pieces and the welding strips to the welding station;
and the welding device 4 welds the battery pieces and the welding strips on the welding station to form a battery string.
The utility model provides a battery piece stringer can weld the battery piece and the solder strip of laying on the line to at least two of welding conveyor 1 simultaneously, that is to say, can once produce two at least battery strings in a welding process, has improved the production efficiency of battery string greatly.
The technical solution provided by the present invention is described below by way of specific embodiments.
In this embodiment, as shown in fig. 1, the cell supplying device 2 includes a cell processing device 21, a cell conveying device 22, and a cell grasping device (not shown), wherein the cell processing device 21 is configured to divide a whole cell into at least two cells and place the divided cells on the cell conveying device 22.
The cell gripping device moves between the cell conveying device 22 and the welding conveying device 1, and at least two cells are gripped by the cell conveying device 22 at one time and placed on the welding conveying device 1 side by side.
The cell processing device 21 comprises a turntable mechanism capable of rotating to a feeding station a, a detection station B, a scribing station C and a sheet breaking station D, a detection mechanism located at the detection station B, a scribing mechanism located at the scribing station C and a sheet breaking mechanism located at the sheet breaking station D;
the turntable mechanism receives a loaded battery piece at a loading station A and drives the battery piece to sequentially rotate to a detection station B, a scribing station C and a piece breaking station D;
further, the turntable mechanism is provided with four bearing tables, and the four bearing tables sequentially rotate to the detection station B, the scribing station C and the sheet breaking station D after being sequentially loaded at the loading station A to bear the battery sheets.
The detection mechanism detects the battery piece at the detection station B;
the scribing mechanism is used for scribing the battery piece at the scribing station C according to the position detection of the detection mechanism on the battery piece;
and the sheet breaking mechanism breaks the battery sheet at the sheet breaking station D along the scribing line.
The detection mechanism can comprise a camera, images are shot on the battery piece through the camera, the battery piece is subjected to positioning detection, incoming material poor detection and the like according to the obtained images, the positioning detection enables the scribing mechanism to scribe according to position detection information of the battery piece, the incoming material poor detection can detect unqualified battery pieces, and therefore the unqualified battery pieces can be removed and placed in the waste material box.
After the cell rotates to the scribing station C, the scribing mechanism scribes the cell according to the detection information of the detection mechanism. The scribing mechanism may be a mechanism including a laser cutting head, dividing the scribe line by laser.
The sheet breaking mechanism can comprise at least two adsorption plates and a rotation driving component for driving the adsorption plates to rotate relative to each other, the at least two adsorption plates can jointly adsorb the whole battery piece, and the whole battery piece can be broken along the scribing line when the adsorption plates rotate relative to each other. In addition, the sheet severing mechanism may further include a sheet driving component, and the sheet driving component drives the adsorption plates to move so that the adsorption plates are separated by a distance, so as to conveniently place the separated battery sheets on the welding and conveying device 1.
In the present embodiment, the battery piece processing device 21 further includes a transferring mechanism, which is configured to transfer the piece breaking mechanism so that the battery pieces broken by the piece breaking mechanism can be released onto the battery piece conveying device 22. Further, the transfer mechanism may be configured to translate the sheet severing mechanism or rotate the sheet severing mechanism. The sheet severing mechanism can be moved horizontally by using an air cylinder or a screw mechanism, and the sheet severing mechanism can be rotated by using a driving component connected with the sheet severing mechanism.
In this embodiment, the battery piece series welding equipment includes two welding conveying devices 1, and a welding strip feeding device 3, a pressure welding strip tool, and a welding device 4 that are provided corresponding to each welding conveying device 1. In this way, at least two battery strings are produced in each process by the two welding conveyors 1 and the corresponding welding device 4, and the production efficiency is higher.
The battery piece feeding device 2 comprises two battery piece conveying devices 22, the battery pieces processed by the battery piece processing device 21 are respectively placed on the two battery piece conveying devices 22, and the two battery piece conveying devices 22 respectively feed to one welding conveying device 1 correspondingly.
As shown in fig. 1, the cell supply device 2 is disposed between two welding conveyors 1, the cell processing device 21 of the cell supply device 2 is disposed between two cell conveyors 22 and at the head end, and the two cell conveyors 22 are disposed corresponding to one welding conveyor 1, so that the cell processing device 21 provides cells to the two cell conveyors 22, and the cells on the cell conveyors 22 are grabbed onto the corresponding welding conveyors 1 by cell grabbing devices, wherein the cell grabbing devices grab at least two cells from the cell conveyors 22 at a time.
In this embodiment, the welding strip feeding device 3 includes a welding strip disc set 31 for providing at least two sets of welding strips and a welding strip traction shearing device 32 corresponding to each set of welding strips, each welding strip traction shearing device 32 pulls the corresponding welding strip and shears the welding strip with a preset length, and the welding strip with the cut preset length is placed on the welding conveying device 1.
As shown in fig. 1, a welding strip disk group 31 and a welding strip traction shearing device 32 are provided corresponding to each welding strip conveying device 1, the welding strip traction shearing device 32 is provided at the head end position of the welding strip conveying device 1, the welding strip disk group 31 is provided at the upstream of the welding strip traction shearing device 32, the welding strip traction shearing device 32 draws the welding strip of the welding strip disk group 31 towards the welding conveying device 1 and shears the welding strip, and then the sheared welding strip and the battery plate are stacked on the welding conveying device 1.
In the process of conveying the stacked battery plates and the welding strips by the welding strip conveying device 1, a welding strip pressing tool is arranged for pressing the stacked battery plates and the welding strips to prevent the positions of the battery plates and the welding strips from deviating. The pressure welding belt tool is conveyed to the welding device 4 along with the welding conveying device 1, and then needs to return to an initial pressing position to be used for pressing a battery piece to be welded and a welding belt of a next round, namely the pressure welding belt tool can be recycled. For this reason, the battery piece series welding equipment in the present embodiment further includes a tool returning device 5, and the tool returning device 5 is configured to return the pressure welding strip tool to the initial pressing position of the welding and conveying device 1.
Preferably, the tool returning device 5 includes a tool conveying mechanism 51, a moving mechanism 52 and a tool grabbing mechanism (not shown in the figure), the moving mechanism 52 moves the pressure welding belt tool to the tool conveying mechanism 51, the tool conveying mechanism 51 conveys the pressure welding belt tool back, and the tool grabbing mechanism grabs the pressure welding belt tool conveyed by the tool conveying mechanism 51 to the battery sheets and the welding belts stacked on the welding conveying device.
As shown in fig. 1, each welding conveyor 1 is provided with a tooling returning device 5, and the tooling returning device 5 is arranged on the inner side of the welding conveyor 1 (on the side close to the other welding conveyor 1).
Of course, it will be understood by those skilled in the art that the tool returning device 5 is not limited to the configuration provided in the present embodiment, and for example, the tool returning device 5 may be a robot arm, and the bonding tape tool may be returned to the pressing initial position by the robot arm.
In addition, the pressure welding strip tool is a tool with any structural form capable of pressing the stacked battery plates and the welding strips, and the specific structure is not detailed here.
In the technical solution provided by the present invention, the welding device 4 can adopt various devices capable of welding the battery plate and the welding strip, for example, the welding device 4 includes a welding light box, and the welding light box radiates heat to weld the part to be welded; alternatively, the welding device 4 comprises a plurality of pressing pins mounted on a heated mounting plate, which take heat from the mounting plate and press against the parts to be welded for welding. The welding method and the structure of the welding device 4 are not limited.
According to the utility model discloses an on the other hand still provides a battery piece series welding method, battery piece series welding method includes:
laying and stacking at least two strings of battery plates and welding strips in parallel to a welding and conveying device;
conveying the at least two strings of battery plates and the welding strips which are paved and stacked to a welding station by using the welding conveying device;
and welding the battery plate and the welding strip positioned at the welding station.
The following describes specific steps of producing a battery string by using the battery piece series welding equipment shown in fig. 1:
and (3) battery piece treatment:
firstly, the whole battery piece is conveyed to a bearing table of a turntable mechanism through a feeding device at a feeding station A, the turntable mechanism drives the battery piece to sequentially rotate to a detection station B, a scribing station C and a piece breaking-off station D, the detection mechanism at the detection station B acquires an image of the battery piece through a camera so as to detect and acquire information such as the position of the battery piece, the scribing mechanism at the scribing station C performs scribing operation on the battery piece according to the detected position information of the battery piece, and the piece breaking-off mechanism at the piece breaking-off station D divides the whole battery piece into at least two battery pieces.
Then, the transferring mechanism transfers the sheet severing mechanism to above the sheet conveying device 22, and releases the severed battery sheets onto the sheet conveying device 22.
During the process of conveying the battery pieces by the battery piece conveying device 22, the battery piece gripping device grips two battery pieces at a time from the battery piece conveying device 22 and places the two battery pieces on the two laying lines 6 of each welding conveying device 1.
And (3) welding strip treatment:
two groups of welding strips are arranged on the welding strip disc group 31, are respectively pulled by the welding strip pulling and shearing device 32 towards the welding and conveying device 1, are cut off after being pulled by a preset length, and are respectively laid on two laying lines 6 of the welding and conveying device 1, so that the battery plates and the welding strips are stacked to form two strings of stacked battery plates and welding strips.
The two strings of stacked battery plates and welding strips are conveyed to a welding station by the welding conveying device 1, the welding strip pressing tool is tightly pressed on the two strings of stacked battery plates and welding strips in the conveying process, and the welding device 4 of the welding station welds the stacked battery plates and welding strips when the battery plates and the welding strips are conveyed to the welding station.
After the pressure welding strip tool is conveyed to the final position along with the stacked battery plates and welding strips, the moving mechanism 52 of the tool returning device 5 moves the pressure welding strip tool from the welding strip conveying device 1 to the tool conveying mechanism 51, the pressure welding strip tool is conveyed back by the tool conveying mechanism 51, and then the pressure welding strip tool is grabbed by the tool grabbing mechanism to be tightly pressed on the battery plates and the welding strips to be welded in the next working procedure.
According to the technical scheme provided by the embodiment, two battery strings can be generated simultaneously in one welding process, and the production efficiency of the battery strings is greatly improved.
It is to be understood by one of ordinary skill in the art that the specific structures and processes shown in the detailed description are exemplary only and not limiting. Moreover, a person skilled in the art can combine the various technical features described above in various possible ways to form new technical solutions, or make other modifications, all of which fall within the scope of the present invention.
Claims (9)
1. The battery piece series welding equipment is characterized by comprising a welding conveying device, a battery piece feeding device, a welding strip feeding device, a pressure welding strip tool and a welding device;
the width of the welding and conveying device is larger than the sum of the widths of at least two battery pieces, so that at least two laying lines are formed on the welding and conveying device, and each laying line can accommodate one battery piece in the width direction of the welding and conveying device;
the battery piece feeding device is positioned at a front station of the welding and conveying device and is configured to lay battery pieces on at least two laying lines of the welding and conveying device;
the welding strip feeding device is positioned at a front station of the welding and conveying device, and welding strips are laid on the at least two laying lines of the welding and conveying device, so that the battery pieces and the welding strips are stacked and laid on each laying line of the welding and conveying device;
the welding belt tool is configured to compress the battery plates and the welding belts which are stacked on the welding conveying device;
the welding conveying device conveys the stacked battery pieces and the welding strips to a welding station;
and the welding device welds the battery piece and the welding strip positioned on the welding station to form a battery string.
2. The battery piece series welding device according to claim 1, wherein the battery piece feeding device comprises a battery piece processing device, a battery piece conveying device and a battery piece grabbing device, wherein the battery piece processing device is used for dividing a whole battery piece into at least two battery pieces and placing the divided battery pieces on the battery piece conveying device;
the battery piece grabbing device moves between the battery piece conveying device and the welding conveying device, and at least two battery pieces are grabbed from the battery piece conveying device at one time and are placed on the welding conveying device side by side.
3. The series welding equipment for the battery piece according to claim 2, wherein the battery piece processing device comprises a turntable mechanism capable of rotating to a feeding station, a detection station, a scribing station and a piece breaking station, the detection mechanism is positioned at the detection station, the scribing mechanism is positioned at the scribing station, and the piece breaking mechanism is positioned at the piece breaking station;
the turntable mechanism receives the loaded battery piece at the loading station and drives the battery piece to sequentially rotate to the detection station, the scribing station and the piece breaking station;
the detection mechanism detects the battery piece at the detection station;
the scribing mechanism is used for scribing the battery pieces at the scribing station according to the position detection of the detection mechanism on the battery pieces;
and the sheet breaking mechanism breaks the battery sheets at the sheet breaking station along the scribing line.
4. The cell series welding device according to claim 3, wherein the cell processing device further comprises a transfer mechanism for transferring the cell severing mechanism so that the severed cells can be released onto the cell conveying device.
5. The battery piece series welding device according to claim 3, wherein the battery piece series welding device comprises two welding conveying devices, and the welding strip feeding device, the pressure welding strip tool and the welding device which are arranged corresponding to each welding conveying device;
the battery piece feeding device comprises two battery piece conveying devices, the battery pieces processed by the battery piece processing device are respectively placed on the two battery piece conveying devices, and the two battery piece conveying devices respectively correspond to one welding conveying device for feeding.
6. The battery piece series welding device according to claim 1, wherein the welding strip feeding device comprises a welding strip disk group for providing at least two groups of welding strips and a welding strip traction and shearing device respectively corresponding to one group of welding strips, each welding strip traction and shearing device pulls the corresponding welding strip, shears a preset length of welding strip, and puts the cut welding strip with the preset length on the welding conveying device.
7. The battery piece series welding device according to any one of claims 1 to 6, further comprising a tool returning device for returning the bonding strip tool to an initial pressing position of the welding conveying device.
8. The battery piece series welding device according to claim 7, wherein the tool returning device comprises a tool conveying mechanism, a moving mechanism and a tool grabbing mechanism, the moving mechanism moves the pressure welding belt tool to the tool conveying mechanism, the tool conveying mechanism conveys the pressure welding belt tool back, and the tool grabbing mechanism grabs the pressure welding belt tool conveyed by the tool conveying mechanism to the battery pieces and the welding belts stacked on the welding conveying device.
9. The battery string welding apparatus according to any one of claims 1 to 6, wherein the welding device includes a welding lamp box that radiates heat to weld a portion to be welded;
or the welding device comprises a plurality of pressing pins arranged on a heated mounting plate, and the pressing pins acquire heat from the mounting plate and press the parts to be welded for welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921795314.XU CN211708446U (en) | 2019-10-24 | 2019-10-24 | Battery piece series welding equipment |
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| CN201921795314.XU CN211708446U (en) | 2019-10-24 | 2019-10-24 | Battery piece series welding equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695578A (en) * | 2019-10-24 | 2020-01-17 | 无锡奥特维科技股份有限公司 | Battery piece series welding equipment and battery piece series welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695578A (en) * | 2019-10-24 | 2020-01-17 | 无锡奥特维科技股份有限公司 | Battery piece series welding equipment and battery piece series welding method |
| CN110695578B (en) * | 2019-10-24 | 2024-03-22 | 无锡奥特维科技股份有限公司 | Battery piece series welding equipment and battery piece series welding method |
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