CN114571176A - Battery string welding device and welding method - Google Patents

Battery string welding device and welding method Download PDF

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Publication number
CN114571176A
CN114571176A CN202210334214.7A CN202210334214A CN114571176A CN 114571176 A CN114571176 A CN 114571176A CN 202210334214 A CN202210334214 A CN 202210334214A CN 114571176 A CN114571176 A CN 114571176A
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CN
China
Prior art keywords
welding
arc
battery
pressing
bearing
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Pending
Application number
CN202210334214.7A
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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 CN202210334214.7A priority Critical patent/CN114571176A/en
Publication of CN114571176A publication Critical patent/CN114571176A/en
Pending legal-status Critical Current

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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
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0461—Welding tables
    • 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
    • B23K37/003—Cooling means
    • 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
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • 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
    • H01L31/04—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 adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • 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
    • H01L31/1876—Particular processes or apparatus for batch treatment of the devices
    • H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The invention provides a battery string welding device and a welding method, wherein the battery string welding device comprises a base, a plurality of welding bearing tables, a pressing positioning mechanism and a welding mechanism, wherein: the welding device comprises a base, a plurality of welding bearing tables and a plurality of welding strips, wherein the welding bearing tables are arranged on the base side by side along a first horizontal direction and each welding bearing table comprises an arc-shaped bearing part for bearing one battery piece and a corresponding welding strip; the pressing and positioning mechanism is used for pressing the battery piece and the welding strip which are borne on the arc-shaped bearing part; the arc bearing part is matched with the pressing and positioning mechanism, so that the battery piece between the arc bearing part and the pressing and positioning mechanism generates deformation matched with the bearing arc surface of the arc bearing part; the welding mechanism is used for welding the deformed battery piece and the corresponding welding strip. According to the battery string welding device provided by the invention, the welding bearing surface is arranged to be arc-shaped, and in the welding process, after the battery string is pressed by the pressing and positioning mechanism, the battery piece is bent away from the welding strip. Therefore, the welding strip is pulled to deform and reset towards the welding strip when being cooled and contracted, and finally the battery piece is restored to an original flat state from a bent state.

Description

Battery string welding device 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 main grid lines of the back-connected cell are arranged on the back, so that the shading of the cell is reduced, and the light conversion efficiency of the cell is improved.
At present, the back contact battery plates are generally welded into a string by adopting a welding strip coated with tin and copper. The solder strip may thermally expand during soldering. After welding is completed, the welding strip is cooled and retracted, so that the battery piece is easy to bend and deform, and the risk of splitting of the battery piece in transportation and subsequent processing is increased.
Disclosure of Invention
In order to solve the above technical problems, a first aspect of the present invention provides a battery string welding apparatus, which has the following detailed technical solution:
the utility model provides a battery cluster welding set for weld the cluster with the formula battery piece that connects on back, battery cluster welding set includes base, a plurality of welding plummer, compresses tightly positioning mechanism and welding mechanism, wherein:
the welding device comprises a base, a plurality of welding bearing tables and a plurality of welding strips, wherein the welding bearing tables are arranged on the base side by side along a first horizontal direction and each welding bearing table comprises an arc-shaped bearing part for bearing one battery piece and a corresponding welding strip;
the pressing and positioning mechanism is used for pressing the battery piece and the welding strip which are borne on the arc-shaped bearing part;
the arc bearing part is matched with the pressing and positioning mechanism, so that the battery piece between the arc bearing part and the pressing and positioning mechanism generates deformation matched with the bearing arc surface of the arc bearing part;
the welding mechanism is used for welding the deformed battery piece and the corresponding welding strip.
The battery string welding device provided by the invention is characterized in that the welding bearing surface for bearing the battery piece and the welding strip is arranged into an arc shape, and the battery piece is bent away from the welding strip after being pressed by the pressing and positioning mechanism in the welding process. Therefore, the battery piece is driven to deform and reset towards the welding strip when the welding strip is cooled and contracted, and finally the battery piece is restored to an original flat state from a bent state.
In some embodiments, the bearing arc surface of the arc bearing part is a first arc bending surface which is convex upwards; the back surface of the battery piece is upwards supported on the arc-shaped supporting part, the welding strip is stacked on the back surface of the battery piece, and when the pressing and positioning mechanism presses the battery piece and the welding strip, the two sides of the battery piece deform downwards and cling to the first arc-shaped bending surface after being pressed.
The utility model provides an implementation of arc load-bearing part places the battery piece back side up on arc load-bearing part, then stacks the solder strip on the battery piece, when pressing down the battery piece, can realize that the battery piece backs on from the solder strip crooked.
In some embodiments, the battery string welding device further comprises a first conveying belt, wherein the first conveying belt is used for conveying at least the battery piece and the welding belt to the arc-shaped bearing part of the corresponding welding bearing table; the arc-shaped bearing part is provided with a conveyer belt avoiding groove which extends along the first horizontal direction and penetrates through the arc-shaped bearing part.
Through setting up first conveyer belt to correspondingly set up the conveyer belt on the arc portion of bearing and dodge the groove, can carry the battery piece on the arc portion of bearing of the welding plummer that corresponds automatically.
In some embodiments, the welding plummer further comprises a bottom plate, the bottom plate is connected to the base, the arc-shaped bearing portion is arranged above the bottom plate, supporting blocks are arranged at positions, corresponding to the avoidance grooves of the conveying belts, of the bottom plate, the supporting blocks penetrate upwards into the avoidance grooves of the corresponding conveying belts, and the supporting blocks are used for supporting the first conveying belts.
Through setting up the bottom plate to set up the supporting shoe that upwards penetrates to the conveyer belt and dodge the inslot on the bottom plate, realized the support to first conveyer belt.
In some embodiments, each welding plummer further comprises a lifting driving member for driving the arc bearing part to lift relative to the bottom plate; when the lifting driving piece drives the arc bearing part to descend to the low position, the first conveying belt floats out of the conveying belt avoiding groove and conveys the battery piece and the welding belt to the upper part of the arc bearing part; when the arc bearing part is driven by the lifting driving piece to ascend to a high position, the first conveying belt sinks into the conveying belt to avoid the groove, and the battery piece and the welding belt on the first conveying belt fall onto the arc bearing part.
Through setting up the lift driving piece, realized the lift drive to arc bearing part for first conveyer belt can be smoothly with the automatic transport of battery piece to arc bearing part on.
In some embodiments, the battery string welding device further includes second conveyor belts disposed on two sides of the first conveyor belt, and the second conveyor belts are used for conveying the pressing and positioning mechanisms to the corresponding welding bearing tables.
Through setting up the second conveyer belt, will compress tightly positioning mechanism and carry to corresponding welding plummer automatically on.
In some embodiments, the pressing and positioning mechanism comprises a first mounting frame and a plurality of first pressing pin assemblies arranged on the first mounting frame side by side along a first horizontal direction, each first pressing pin assembly comprises a plurality of pressing pins arranged side by side along a second horizontal direction perpendicular to the first horizontal direction, and each pressing pin is used for pressing one welding strip; the elastic pressing force of the first needle pressing assemblies positioned in the two side areas is larger than that of the first needle pressing assembly positioned in the middle area.
Through setting up compressing tightly positioning mechanism, on the one hand, can guarantee all to compress tightly on the battery piece with the solder strip that stacks on the battery piece. On the other hand, since the compression pressure of the two side regions of the battery piece is greater than that of the middle region, the battery piece can be bent downwards at two sides more smoothly.
In some embodiments, the bearing arc surface of the arc bearing part is a concave second arc bending surface; the welding strips are laid on the arc-shaped bearing part, and the back surfaces of the battery pieces are downwards stacked on the welding strips; when the pressing and positioning mechanism presses the battery piece and the welding strip, the middle of the battery piece is bent downwards after being pressed and is tightly attached to the second arc-shaped bent surface.
The utility model provides an implementation of another kind of arc bearing part, lay the solder strip on arc bearing part earlier, then place the battery piece back side down on arc bearing part, when pressing down the battery piece, can realize that the battery piece backs on from the solder strip crooked.
In some embodiments, the arc-shaped bearing portion is formed with a solder strip accommodating groove extending along the first horizontal direction and penetrating through the arc-shaped bearing portion, and the solder strip is laid in the solder strip accommodating groove.
Through set up on arc bearing part and weld the area storage tank, realized the location to welding the area to guarantee to weld the area and align to the corresponding main grid line on the battery piece.
In some embodiments, a lift-up hole communicated with the solder strip accommodating groove is arranged below the solder strip accommodating groove, and a lift-up pin is arranged in the lift-up hole and used for lifting up the solder strip in the solder strip accommodating groove so as to press the solder strip against the battery piece.
The welding strip is upwards jacked through the thimble, the welding strip is guaranteed to be pressed on the battery piece, and cold joint is prevented.
In some embodiments, the pressing and positioning mechanism comprises a second mounting frame and a plurality of second pressing pin assemblies arranged on the second mounting frame side by side along the first horizontal direction; the elastic pressing force of the second needle pressing assemblies positioned in the two side areas is smaller than that of the second needle pressing assembly positioned in the middle area.
Through setting up compressing tightly positioning mechanism for the compressive pressure of the middle zone of battery piece is greater than the compressive pressure of both sides region, so, the middle downwarping can be realized more smoothly to the battery piece.
In some embodiments, the base is provided with a slide rail extending along the first horizontal direction, and each welding plummer is slidably connected to the slide rail.
The adjustment of the distance between the welding bearing tables is realized, so that the preset distance is reserved between the battery plates in the welded battery strings.
In some embodiments, the welding bearing table is provided with horizontal bearing surfaces at two ends of the arc-shaped bearing part, and the horizontal bearing surfaces are used for bearing the end parts of the pressing and positioning mechanism.
The horizontal bearing surfaces are arranged at the two ends of the arc-shaped bearing part, so that the horizontal bearing surfaces can be stably supported.
The second aspect of the present invention provides a battery string welding method for welding back-connected battery pieces into a string by using the battery string welding apparatus provided in the first aspect of the present invention, the battery string welding method comprising:
placing a plurality of battery pieces and welding strips on the arc-shaped bearing parts of the corresponding welding bearing tables;
pressing a plurality of pressing and positioning mechanisms on the battery pieces and the welding belts loaded on the arc-shaped loading parts correspondingly, so that the battery pieces between the arc-shaped loading parts and the pressing and positioning mechanisms are deformed to be matched with the loading arc surfaces of the arc-shaped loading parts;
and controlling the welding mechanism to weld the deformed battery piece and the corresponding welding strip.
According to the welding method of the battery string, the battery sheet is bent in a bending mode in the welding process, so that the back of the battery sheet is bent away from the welding strip. When the welding strip is cooled and shrunk, the battery piece can be driven to deform and reset towards the welding strip, and finally the battery piece is restored to an original flat state from a bent state.
In some embodiments, the bearing surface of the arc-shaped bearing part is an arc-shaped curved surface which is convex upwards. Place a plurality of battery pieces and weld the area to the arc portion of bearing of the welding plummer that corresponds, include: and placing the battery piece with the back side facing upwards on the corresponding arc-shaped bearing part, and stacking the welding strips on the back side of the corresponding battery piece.
The utility model provides an implementation of arc load-bearing part places the battery piece back side up on arc load-bearing part, then stacks the solder strip on the battery piece, through pressing the battery piece, can realize that the battery piece backs from the solder strip bending.
In some embodiments, the bearing surface of the arc-shaped bearing part is a concave arc-shaped curved surface. Will compress tightly positioning mechanism and correspond to press and include on bearing battery piece and the solder strip on each arc portion of bearing: and laying the solder strips on the corresponding arc-shaped bearing parts, and stacking the back surfaces of the battery pieces downwards on the corresponding solder strips.
The utility model provides an implementation of another kind of arc bearing part, lay the solder strip on arc bearing part earlier, then place the battery piece back side down on arc bearing part, through pressing the battery piece, can realize that the battery piece backs on from the solder strip crooked.
Drawings
Fig. 1 is a schematic structural diagram of a battery string welding apparatus according to a first embodiment of the present invention;
FIG. 2 is a partial method diagram of area A in FIG. 1;
FIG. 3 is a schematic structural diagram of a welding susceptor in a first embodiment of the present invention;
FIG. 4 is a schematic view of a welding carriage and hold down positioning mechanism in a second embodiment of the present invention;
FIG. 5 is a schematic view of a welding carriage and hold down positioning mechanism carrying a battery plate and a solder strip in a second embodiment of the present invention from one perspective;
fig. 6 is a schematic view of a welding carrier and a pressing and positioning mechanism carrying a battery plate and a solder strip in a second embodiment of the invention from another perspective;
fig. 1 to 6 include:
a base 10;
welding the bearing table 20: the welding strip welding machine comprises an arc-shaped bearing part 21, a conveying belt avoiding groove 22, a first arc-shaped bent surface 23, a horizontal bearing surface 24, a welding strip accommodating groove 25, a second arc-shaped bent surface 26, a thimble 27, a bottom plate 28 and a supporting block 29;
the pressing and positioning mechanism 30: a second mounting frame 31, a second presser pin assembly 32;
a first conveyor belt 40;
a second conveyor belt 50.
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.
At present, the back contact battery plates are generally welded into a string by adopting a welding strip coated with tin and copper. The solder strip expands when heated during soldering. After welding is completed, the welding strip is cooled and retracted, so that the battery piece is easy to bend and deform, and the risk of splitting of the battery piece in transportation and subsequent processing is increased.
In view of the above, the present invention provides a battery string welding apparatus, which is used to weld a back-contact battery string and can pre-bend a battery plate before welding. Thereby offsetting the bending of the battery plate caused by the cooling retraction of the welding strip after welding.
The battery string welding apparatus provided by the present invention will be exemplified by two embodiments.
First embodiment
As shown in fig. 1 to fig. 3, the battery string welding apparatus provided in this embodiment includes a base 10, a plurality of welding loading platforms 20, a pressing and positioning mechanism 30, and a welding mechanism.
A plurality of welding susceptors 20 are loaded on the base 10 side by side along a first horizontal direction (e.g. X-axis direction), and each welding susceptors 20 includes an arc-shaped bearing portion 21 for bearing a battery piece and a corresponding solder strip. In this embodiment, the bearing arc surface of the arc bearing part 21 is a first arc bending surface 23 which is convex upward.
The working process of the battery string welding device in the embodiment is as follows:
and laying the battery pieces and the welding tapes so that the back surfaces of the battery pieces are upwards loaded on the arc-shaped loading parts 21 of the corresponding welding loading platforms 20, and the welding tapes are laid on the back surfaces of the corresponding battery pieces.
A pressing and positioning mechanism 30 is pressed on each cell. By pressing the pressing and positioning mechanism 30, the welding strip is pressed and positioned on the main grid line of the battery piece on the one hand, and the two sides of the battery piece are bent and deformed downwards and finally attached to the first arc-shaped curved surface 23 on the other hand.
And finally, welding the welding strip on the back of the battery piece deformed downwards by a welding mechanism.
Therefore, each battery piece in the welded battery string deviates from the welding strip by a certain radian and bends downwards.
And after the battery string is blanked from the welding station, the welding strip is cooled and contracted, and in the process, the welding strip pulls the battery pieces upwards, so that all the battery pieces are completely or basically restored to the original flat state.
Optionally, the battery string welding apparatus in this embodiment further includes a plurality of first conveyor belts 40 extending in the first horizontal direction. Correspondingly, a plurality of conveyer belt avoiding grooves 22 extending along the first horizontal direction and penetrating through the arc-shaped bearing part 21 are formed on the arc-shaped bearing part 21 of each welding bearing table 20.
The first conveying belt 40 is at least used for conveying the stacked battery plates and the welding strips to the corresponding arc-shaped bearing parts 21 of the welding bearing table 20, so that the automatic feeding of the battery plates and the welding strips is realized.
After welding into a string, the first conveyor belt 40 is also capable of conveying the battery string from the welding station to the blanking station.
In the embodiment shown in fig. 3, the welding platform 20 is a split structure, and further includes a bottom plate 28 connected to the base 10, and the arc-shaped supporting portion 21 is disposed above the bottom plate 28. The bottom plate 28 is provided with a supporting block 29 at a position corresponding to each of the conveyor avoiding grooves 22, and the supporting block 29 penetrates upward into the corresponding conveyor avoiding groove 22 to support the corresponding first conveyor 40.
Optionally, each welding plummer 20 includes a lifting driving member for driving the arc bearing portion 21 to lift relative to the bottom plate 28, when the lifting driving member drives the arc bearing portion 21 to fall to the low position, the first conveying belt 40 floats out of the conveying belt avoiding groove 22, and when the lifting driving member drives the arc bearing portion 21 to rise to the high position, the first conveying belt 40 sinks into the conveying belt avoiding groove 22.
The welding plummer 20 cooperates with the first conveyer belt 40 to accomplish the feeding and discharging of the battery piece and the welding strip, and the concrete process is as follows:
the lifting driving member of each welding plummer 20 drives the corresponding arc bearing portion 21 to descend, so that the first conveyor belt 40 floats out of the conveyor belt avoiding groove 22.
After the battery pieces and the welding tapes are laid on the first conveying belt 40, the first conveying belt 40 is controlled to convey towards the welding station, and finally, each battery piece reaches the upper part of the corresponding welding bearing platform 20.
The lifting driving member of each welding plummer 20 drives the corresponding arc bearing portion 21 to rise to a high position, so that the first conveying belt 40 sinks into the conveying belt avoiding groove 22, and the battery pieces and the welding belts on the first conveying belt 40 fall onto the corresponding arc bearing portion 21 of the welding plummer 20.
Therefore, automatic feeding of the battery piece and the welding strip is completed.
After the welding of the battery pieces is completed to form the string, the lifting driving pieces of the welding bearing tables 20 drive the corresponding arc bearing parts 21 to descend to the low position, so that the first conveying belt 40 floats out of the conveying belt avoiding groove 22, and the battery string is jacked and borne on the first conveying belt 40.
The first conveying belt 40 conveys the battery strings to a blanking station, and automatic blanking of the battery strings is completed.
Of course, the welding platform 20 may be an integral structure, and at this time, the lifting driving member drives the welding platform 20 to lift integrally.
As shown in fig. 1 and fig. 2, optionally, the battery string welding apparatus in this embodiment further includes a second conveyor belt 50 disposed on both sides of the first conveyor belt 40, and the second conveyor belt 50 is used for conveying the pressing and positioning mechanism 30 to the corresponding welding carrier 20, so as to automatically press and place the pressing and positioning mechanism 30 onto the corresponding battery piece.
Optionally, horizontal bearing surfaces 24 are formed at two ends of the arc-shaped bearing portion 21 of the welding bearing platform 20, and the horizontal bearing surfaces 24 are used for bearing ends of the pressing and positioning mechanism 30, so as to ensure that the pressing and positioning mechanism 30 can be stably pressed on the corresponding battery piece.
Optionally, the pressing and positioning mechanism 30 in this embodiment includes a first mounting frame and a plurality of first pressing pin assemblies arranged side by side along a first horizontal direction on the first mounting frame. Each first tucking needle subassembly all includes the tucking needle that many second horizontal direction (like Y axle direction) along the first horizontal direction of perpendicular to set up side by side, and every tucking needle all is used for compressing tightly a solder strip. In particular, the elastic pressing force of the first needle pressing assemblies positioned in the two side areas is larger than that of the first needle pressing assembly positioned in the middle area.
By arranging the pressing and positioning mechanism 30 in this way, when the pressing and positioning mechanism 30 is pressed on the battery piece, on one hand, it can be ensured that all the solder strips stacked on the battery piece by the pressing and positioning mechanism 30 are correspondingly pressed on the battery piece. On the other hand, since the compression pressure of the two side regions of the battery piece is greater than that of the middle region, the battery piece can more easily realize the downward bending of the two sides.
Optionally, in this embodiment, a slide rail extending along the first horizontal direction is disposed on the base, and each welding plummer 20 is slidably connected to the slide rail. By means of the arrangement, the distance between the welding bearing tables 20 can be adjusted, and therefore a preset target distance between the battery pieces in the welded battery string is guaranteed.
Second embodiment
The structure of the battery string welding device provided in this embodiment is substantially the same as that of the battery string welding device in the first embodiment, and for brevity of description, only the different technical points existing in this embodiment are described in detail in this specification.
As shown in fig. 4 to 6, in the present embodiment, the bearing arc surface of the arc bearing portion 21 of the welding bearing table 20 is a concave second arc-shaped curved surface 26.
The working process of the battery string welding device in the embodiment is as follows:
the solder ribbons are laid on the arc-shaped support portions 21 of the corresponding solder support stands 20, and the battery pieces are stacked on the corresponding solder ribbons with the back surfaces facing downward.
A hold-down positioning mechanism 30 is placed on each cell. By pressing the pressing and positioning mechanism 30, the welding strip is pressed and positioned on the main grid line of the battery piece on the one hand, and the middle part of the battery piece is bent and deformed downwards and finally clings to the second arc-shaped bent surface 26 on the other hand.
And finally, welding the welding strip on the back of the battery piece by a welding mechanism.
Therefore, each battery piece in the welded battery string deviates from the welding strip by a certain radian and is bent upwards.
And after the battery string is blanked from the welding station, the welding strip is cooled and contracted, and in the process, the welding strip pulls the battery pieces downwards, so that all the battery pieces are completely or basically restored to the original flat state.
Optionally, in this embodiment, a solder strip accommodating groove 25 extending along the first horizontal direction and penetrating through the arc-shaped bearing portion 21 is formed on the arc-shaped bearing portion 21 of each solder bearing platform 20, and the solder strip is laid in the solder strip accommodating groove 25. Through setting up the welding strip storage tank 25, realized the location to welding the area, prevent to weld the area and slide, guarantee to weld the area all with the battery piece on correspond the main grid line and align, promoted the welding effect.
Optionally, the lower side of the welding strip accommodating groove 25 is provided with a jacking hole communicated with the welding strip accommodating groove 25, and the jacking hole is internally provided with a thimble 27. In the process of welding the strip, the thimble 27 jacks up the welding strip in the welding strip accommodating groove, so as to ensure that the welding strip can be pressed on the battery piece, and further improve the welding effect.
Optionally, the pressing and positioning mechanism 30 in this embodiment includes a second mounting frame 31 and a plurality of second pressing pin assemblies 32 arranged side by side on the second mounting frame 31 along the first horizontal direction. In particular, the elastic pressing force of the second presser foot assembly 32 located in the two side regions is smaller than that of the second presser foot assembly located in the middle region.
By thus arranging the pressing and positioning mechanism 30, when the pressing and positioning mechanism 30 is pressed on the battery piece, the pressing pressure of the middle area of the battery piece is greater than the pressing pressure of the two side areas, so that the battery piece can be bent downwards in the middle more easily.
The invention also provides a battery string welding method, which adopts the battery string welding device provided by the invention to weld back-connected battery pieces into strings, and the battery string welding method comprises the following steps:
and placing a plurality of battery plates and welding strips on the arc-shaped bearing parts 21 of the corresponding welding bearing platform 20.
The pressing and positioning mechanisms 30 are correspondingly pressed on the battery pieces and the welding belts borne on the arc bearing parts 21, so that the battery pieces between the arc bearing parts 21 and the pressing and positioning mechanisms 30 are deformed to be matched with the bearing arc surfaces of the arc bearing parts 21.
And controlling the welding mechanism to weld the deformed battery piece and the corresponding welding strip so as to obtain the battery string.
In some alternative embodiments, as in the first embodiment, the bearing surface of the arc-shaped bearing part 21 is a first arc-shaped curved surface 23 which is convex upwards. In these embodiments, placing a plurality of battery pieces and solder strips on the arc-shaped bearing portion 21 of the corresponding welding bearing table 20 specifically includes: the battery pieces are placed on the corresponding arc-shaped bearing parts 21 with the back surfaces of the battery pieces facing upward, and the solder ribbons are stacked on the back surfaces of the corresponding battery pieces.
Under the pressing of the pressing and positioning mechanism 30, the two sides of the battery piece are bent and deformed downwards and finally cling to the first arc-shaped bending surface 23. Therefore, each battery piece in the welded battery string deviates from the welding strip by a certain radian and bends downwards.
And after the battery string is fed from the welding station, the welding strip is cooled and contracted, and in the process, the welding strip pulls the battery pieces upwards, so that all the battery pieces are completely or basically restored to the original flat state.
As mentioned in the foregoing first embodiment, optionally, the battery string welding device is further provided with a first conveying belt 40, in this case, after the pressing and positioning mechanisms 30 are correspondingly pressed on the battery pieces and the welding belts carried on the arc-shaped carrying parts 21, the method further includes: the arc-shaped carrier part 21 is lifted up so that the first conveyor belt 40 sinks into the solder strip avoiding groove on the arc-shaped carrier part 21.
In other alternative embodiments, as in the second embodiment, the bearing surface of the arc-shaped bearing part 21 is a concave second arc-shaped curved surface 26. In these embodiments, placing a plurality of battery pieces and solder strips on the arc-shaped bearing part of the corresponding welding bearing table specifically includes: and laying the solder strips on the corresponding arc-shaped bearing parts, and stacking the back surfaces of the battery pieces downwards on the corresponding solder strips.
Under the pressing of the pressing and positioning mechanism 30, the middle part of the battery piece is bent and deformed downwards and finally clings to the second arc-shaped bent surface 26. Therefore, each battery piece in the welded battery string deviates from the welding strip by a certain radian and is bent upwards.
And after the battery string is blanked from the welding station, the welding strip is cooled and contracted, and in the process, the welding strip pulls the battery pieces downwards, so that all the battery pieces are completely or basically restored to the original flat state.
As mentioned in the foregoing second embodiment, optionally, the arc-shaped bearing portion is provided with a solder strip receiving slot 25, and the solder strip receiving slot 25 is provided with a jacking hole below, and the jacking hole is provided with a thimble 27 therein.
In these embodiments, after pressing the pressing and positioning mechanisms on the battery pieces and the solder strips loaded on the arc-shaped loading parts, the method further includes: the jacking thimble upwards presses the solder strip on the battery piece of top to further promote the welding effect, prevent the rosin joint.
The invention has been described above with a certain particularity and detail. 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 set for weld the cluster with the formula battery piece that connects on the back, its characterized in that, battery cluster welding set includes base, a plurality of welding plummer, compresses tightly positioning mechanism and welding mechanism, wherein:
the welding bearing tables are arranged on the base side by side along a first horizontal direction, and each welding bearing table comprises an arc-shaped bearing part used for bearing one battery piece and a corresponding welding strip;
the pressing and positioning mechanism is used for pressing the battery piece and the welding strip which are borne on the arc-shaped bearing part;
the arc bearing part is matched with the pressing and positioning mechanism, so that the battery piece between the arc bearing part and the pressing and positioning mechanism generates deformation matched with the bearing arc surface of the arc bearing part;
and the welding mechanism is used for welding the deformed battery piece and the corresponding welding strip.
2. The battery string welding apparatus according to claim 1, wherein:
the bearing cambered surface of the arc bearing part is a first arc-shaped bending surface which is convex upwards;
the back surface of the battery piece is upwards supported on the arc-shaped supporting part, the welding strip is stacked on the back surface of the battery piece, and when the pressing and positioning mechanism presses the battery piece and the welding strip, two sides of the battery piece deform downwards and cling to the first arc-shaped bending surface after being pressed.
3. The battery string welding device according to claim 2, further comprising a first conveyor belt for conveying at least a battery piece and a welding belt to the arc-shaped bearing part of the corresponding welding bearing table;
the arc bearing part is provided with a conveyer belt avoidance groove which extends along the first horizontal direction and penetrates through the arc bearing part.
4. The battery string welding device according to claim 3, wherein the welding carrier further comprises a bottom plate, the bottom plate is connected to the base, the arc-shaped bearing portion is disposed above the bottom plate, a support block is disposed on the bottom plate at a position corresponding to each of the conveyor belt avoiding grooves, the support block penetrates upward into the corresponding conveyor belt avoiding groove, and the support block is used for supporting the first conveyor belt.
5. The battery string welding device according to claim 4, wherein each welding carriage further comprises a lifting driving member for driving the arc-shaped carriage to lift and lower relative to the base plate;
when the lifting driving piece drives the arc bearing part to descend to a low position, the first conveying belt floats out of the conveying belt avoidance groove, and the first conveying belt conveys the battery piece and the welding belt to the upper part of the arc bearing part;
when the lifting driving piece drives the arc bearing part to ascend to a high position, the first conveying belt sinks into the conveying belt avoiding groove, and the battery piece and the welding belt on the first conveying belt fall onto the arc bearing part.
6. The battery string welding device according to claim 2, further comprising second conveyor belts disposed on both sides of the first conveyor belt, the second conveyor belts being configured to convey the pressing and positioning mechanisms to the corresponding welding carriers.
7. The battery string welding apparatus according to claim 2, wherein:
the pressing and positioning mechanism comprises a first mounting frame and a plurality of first pressing pin assemblies which are arranged on the first mounting frame side by side along the first horizontal direction, each first pressing pin assembly comprises a plurality of pressing pins which are arranged side by side along a second horizontal direction perpendicular to the first horizontal direction, and each pressing pin is used for pressing one welding strip;
the elastic pressing force of the first needle pressing assemblies positioned in the two side areas is larger than that of the first needle pressing assembly positioned in the middle area.
8. The battery string welding device according to claim 1, wherein the bearing arc surface of the arc-shaped bearing part is a concave second arc-shaped curved surface;
the welding strips are laid on the arc-shaped bearing part, and the back surfaces of the battery pieces are downwards stacked on the welding strips;
when the pressing and positioning mechanism presses the battery piece and the welding strip, the middle of the battery piece is bent downwards after being pressed and is tightly attached to the second arc-shaped bent surface.
9. The battery string welding apparatus according to claim 8, wherein the arc-shaped bearing portion is formed with a solder ribbon accommodation groove extending in the first horizontal direction and penetrating the arc-shaped bearing portion, and a solder ribbon is laid in the solder ribbon accommodation groove.
10. The battery string welding device according to claim 9, wherein a lift-up hole communicating with the solder strip receiving groove is provided below the solder strip receiving groove, and a lift-up pin is provided in the lift-up hole for lifting up the solder strip in the solder strip receiving groove to press the solder strip against the battery piece.
11. The battery string welding apparatus according to claim 8,
the pressing and positioning mechanism comprises a second mounting frame and a plurality of second needle pressing assemblies which are arranged on the second mounting frame side by side along the first horizontal direction;
the elastic pressing force of the second needle pressing assemblies positioned in the two side areas is smaller than that of the second needle pressing assembly positioned in the middle area.
12. The battery string welding device according to claim 1, wherein the base is provided with a slide rail extending in the first horizontal direction, and each welding carriage is slidably connected to the slide rail.
13. The battery string welding device according to claim 1, wherein horizontal bearing surfaces are formed on the welding bearing table at both ends of the arc-shaped bearing part, and the horizontal bearing surfaces are used for bearing the end parts of the pressing and positioning mechanism.
14. A battery string welding method for welding back-connected battery plates into a string using the battery string welding apparatus according to claim 1, the battery string welding method comprising:
placing a plurality of battery pieces and welding strips on the corresponding arc-shaped bearing parts of the welding bearing table;
pressing the pressing and positioning mechanisms on the battery pieces and the welding strips loaded on the arc-shaped loading parts correspondingly, so that the battery pieces between the arc-shaped loading parts and the pressing and positioning mechanisms are deformed to be matched with the loading cambered surfaces of the arc-shaped loading parts;
and controlling the welding mechanism to weld the deformed battery piece and the corresponding welding strip.
15. The method of welding a battery string as defined in claim 14, wherein: the bearing surface of the arc bearing part is an upward convex arc bending surface,
place a plurality of battery pieces and solder strip to corresponding on the arc portion of bearing of welding plummer, include: and placing the battery piece with the back surface facing upwards on the corresponding arc-shaped bearing part, and overlapping the welding strips on the back surface of the corresponding battery piece.
16. The method of welding a battery string as defined in claim 14, wherein: the bearing surface of the arc bearing part is a concave arc bending surface;
the pressing positioning mechanisms correspondingly press the battery pieces and the welding strips loaded on the arc-shaped loading parts, and the pressing positioning mechanisms comprise: and laying solder strips on the corresponding arc-shaped bearing parts, and stacking the back surfaces of the battery pieces downwards on the corresponding solder strips.
CN202210334214.7A 2022-03-31 2022-03-31 Battery string welding device and welding method Pending CN114571176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210334214.7A CN114571176A (en) 2022-03-31 2022-03-31 Battery string welding device and welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210334214.7A CN114571176A (en) 2022-03-31 2022-03-31 Battery string welding device and welding method

Publications (1)

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CN114571176A true CN114571176A (en) 2022-06-03

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CN202210334214.7A Pending CN114571176A (en) 2022-03-31 2022-03-31 Battery string welding device and welding method

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115332396A (en) * 2022-10-10 2022-11-11 苏州小牛自动化设备有限公司 Diaphragm for preparing battery string, positioning tool conveying device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115332396A (en) * 2022-10-10 2022-11-11 苏州小牛自动化设备有限公司 Diaphragm for preparing battery string, positioning tool conveying device and method
CN115332396B (en) * 2022-10-10 2023-02-14 苏州小牛自动化设备有限公司 Diaphragm for preparing battery string, positioning tool conveying device and method

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