Integrated equipment for fragmenting, passivating and welding battery piece

Abstract

The utility model discloses battery piece fragmentation, passivation and welding integrated equipment which comprises a feeding device, an evaporation device, a piece carrying device and a series welding device which are arranged in sequence and further comprises a belt manufacturing device arranged at an interval with the piece carrying device, and the feeding device is used for scribing a battery piece to form battery piece fragments and conveying the battery piece fragments to the evaporation device; the evaporation device is used for evaporating a passivation layer on the section of the cell slice and conveying the passivation layer to the slice carrying device; the slide glass device conveys at least one cell slice series welding device to the series welding device; the strip manufacturing device is used for manufacturing at least one welding strip set to the series welding device. And the series welding device is used for typesetting and welding the plurality of battery piece fragments and the plurality of welding strip groups according to a preset mode to form a battery string. According to the technical scheme, the problems that the storage time of the passivated battery piece fragments is too long, the passivation layer of the fracture surface can chemically react with water vapor in air and the like, and the efficiency improving effect is influenced can be solved, and the problem of large-scale production of string making of the passivated battery piece fragments is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery cell passivation technology, and in particular to an integrated equipment for battery cell passivation and welding. Background Technology

[0002] The cross-sections of the solar cells after they are split are not passivated, which leads to increased edge recombination and reduced conversion efficiency, thereby further reducing the conversion efficiency of the photovoltaic module.

[0003] In related technologies, passivation treatment of the cross-sections of solar cell slabs is achieved through physical deposition, specifically evaporation coating. This involves stacking multiple solar cell slabs and placing them in a vacuum environment, then thermally evaporating an alumina target to deposit a passivation layer on the cross-sections of the slabs. The slabs are then annealed. While this process can repair the cross-sections of the solar cell slabs, conventional storage of the passivated slabs for extended periods can cause the passivation layer to react chemically with water vapor in the air, affecting efficiency. Therefore, there is an urgent need for an integrated passivation and stringing equipment to enable the large-scale production of passivated solar cell slabs into strings. Utility Model Content

[0004] The purpose of this invention is to provide an integrated equipment and method for passivating and welding battery cells, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery cell slicing, passivation, and welding integrated equipment, comprising a feeding device, a vapor deposition device, a wafer carrier device, and a string welding device arranged sequentially, and further comprising a tape-making device spaced apart from the wafer carrier device. The feeding device is used to cut the battery cells into slices and transport them to the vapor deposition device; the vapor deposition device is used to vapor deposit a passivation layer on the cross-section of the slices and transport them to the wafer carrier device; the wafer carrier device transports at least one of the slices to the string welding device; the tape-making device is used to prepare at least one set of welding tapes to the string welding device; the string welding device is used to arrange and weld multiple slices of battery cells and multiple sets of welding tapes in a preset manner to form a battery string.

[0006] Preferably, the feeding device includes a dicing mechanism, a stacking mechanism, and a feeding mechanism arranged in sequence. The dicing mechanism is used to dice the battery cells to form battery cell slices and to transport them to the stacking mechanism. The stacking mechanism is used to stack multiple battery cell slices into a material box and to transport the material box to the feeding mechanism. The feeding mechanism is used to transport the material box to the vapor deposition apparatus.

[0007] Preferably, the stacking mechanism includes a stacking hand, a loading platform, and a material box transporter. The stacking hand is movably disposed above the loading platform. The stacking hand can stack multiple battery cells onto the material box carried by the loading platform, and the cross-sections of the multiple battery cells are coplanar. The loading platform is raised and lowered relative to the stacking hand. The loading platform is used to carry the material box. The material box transporter is used to transport the material box and multiple battery cells carried by the loading platform to the feeding mechanism.

[0008] Preferably, the device further includes a material box circulation device, a wafer unloading hand, a unloading platform, and a feeding device. The wafer unloading hand is movably disposed above the unloading platform. The unloading platform is used to carry the material box and multiple battery cell wafers after vapor deposition by the vapor deposition device. The wafer unloading hand is used to separate multiple battery cell wafers from the material box and transport them to the feeding device. The feeding device is used to transport at least one battery cell wafer to the wafer carrier. The material box circulation device is used to transport at least one material box in an unloaded state carried by the unloading platform to the stacking mechanism.

[0009] Preferably, the vapor deposition apparatus includes a vapor deposition furnace, a conveying mechanism, and an annealing furnace, wherein the vapor deposition furnace and the annealing furnace are arranged sequentially. The conveying mechanism is used to convey the battery cells carried on the feeding device to the vapor deposition furnace for vapor deposition treatment, and then convey the vapor-deposited battery cells to the annealing furnace for annealing treatment.

[0010] Preferably, the wafer carrier device includes a sorting mechanism and multiple wafer carrier channels. The sorting mechanism is used to sort the multiple solar cells according to preset requirements and transport them to the multiple wafer carrier channels respectively.

[0011] Preferably, the sorting mechanism includes a visual inspection sorting component and a conveying channel. The visual inspection sorting component is disposed on the conveying channel, and the discharge end of the conveying channel is connected to the inlet end of the plurality of carrier channels.

[0012] Preferably, the sorting mechanism further includes a PL detection sorting component, and the visual detection sorting component and the PL detection sorting component are sequentially arranged on the conveying channel.

[0013] Preferably, the stringing device includes a cell transfer hand, a welding strip transfer hand, a conveying mechanism, an infrared welding head, and a stringing knife assembly. The cell transfer hand is used to transfer at least one of the battery cell segments to the conveying mechanism, the welding strip transfer hand is used to transfer at least one set of welding strips to the conveying mechanism, and the infrared welding head is used to weld multiple battery cell segments and multiple sets of welding strips arranged on the conveying mechanism in the preset manner to form the battery string.

[0014] The technical solution adopted in this application can achieve the following beneficial effects:

[0015] This application discloses an integrated equipment for passivation and welding of battery cells. In the process of using this equipment, firstly, a feeding device dices the battery cells to form battery cell slices and transports them to a vapor deposition device. Then, the vapor deposition device deposits a passivation layer on the cross-section of the battery cell slices and transports them to a carrier device. Specifically, by sublimating a target material (metal oxide, such as aluminum oxide, titanium oxide, etc.), the gaseous target material evaporates and adheres to the cross-section of the battery cell slice to form a passivation layer. The vapor-deposited battery cell slices are then annealed to change the interface structure between the passivation layer and the cross-section, thereby breaking the Si dangling bonds and reducing the probability of minority carriers (minority charge carriers) meeting and recombinating on the surface, thus reducing the surface recombination rate. Next, the carrier device transports at least one battery cell slice to the stringing device, and a ribbon-making device prepares at least one set of ribbons to the stringing device. Finally, the stringing device arranges and welds multiple battery cell slices and multiple sets of ribbons in a preset manner to form a battery string.

[0016] In the above structure, through the cooperation between the feeding device, the vapor deposition device, the wafer carrier device, the tape making device and the stringing device, the passivated battery cells are produced in large scale by dividing and stringing according to the process of dicing, cutting vapor deposition and stringing. This also avoids the passivated battery cells being left unattended for too long, which would affect the efficiency improvement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a first partial side view of the integrated battery cell slab passivation and welding equipment disclosed in this application embodiment;

[0019] Figure 2 This is a second-part side view of the integrated battery cell slab passivation and welding equipment disclosed in this application embodiment;

[0020] Figure 3 This is a partial side view and top view of the integrated passivation and welding equipment for battery cells disclosed in this application.

[0021] In the diagram: 110, dicing mechanism; 120, stacking mechanism; 121, stacking hand; 122, loading platform; 123, material box handler; 130, feeding mechanism; 200, vapor deposition device; 210, vapor deposition furnace; 220, annealing furnace; 300, wafer carrier; 410, material box circulation device; 420, wafer unloading hand; 430, unloading device; 510, wafer handling hand; 520, welding strip handler; 530, conveying mechanism; 540, infrared welding head. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] It should be noted that when a component is said to be "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] like Figures 1 to 3 As shown, this application discloses an integrated equipment for passivation and welding of battery cells. The disclosed integrated equipment for passivation and welding of battery cells includes a feeding device, a vapor deposition device 200, a wafer carrier device 300 and a string welding device arranged in sequence, and also includes a tape making device arranged at intervals from the wafer carrier device 300.

[0026] Specifically, the feeding device is used to cut the battery cells into segments and transport them to the vapor deposition device 200; the vapor deposition device 200 is used to vapor deposit a passivation layer on the cross-section of the battery cell segments and transport them to the carrier device 300; the carrier device 300 transports at least one battery cell segment stringing device to the stringing device; the ribbon making device is used to prepare at least one set of ribbons to the stringing device; the stringing device is used to arrange and weld multiple battery cell segments and multiple sets of ribbons in a preset manner to form a battery string.

[0027] In the process of using the integrated passivation and welding equipment for battery cells, firstly, the feeding device divides the battery cells into diced pieces and conveys them to the vapor deposition device 200; then, the vapor deposition device 200 vapor deposits a passivation layer on the cross-section of the battery cell diced pieces and conveys them to the carrier device 300. Here, by sublimating the target material (metal oxide, such as aluminum oxide, titanium oxide, etc.), the gaseous target material evaporates and adheres to the cross-section of the battery cell diced piece to form a passivation layer. The vapor-deposited battery cell diced piece is then annealed to change the interface structure between the passivation layer and the cross-section, thereby breaking the Si dangling bonds and reducing the probability of minority carriers (minority charge carriers) meeting and recombinating on the surface, thus reducing the surface recombination rate. Next, the carrier device 300 conveys at least one battery cell diced piece to the stringing device, and the ribbon-making device prepares at least one set of solder ribbons to the stringing device. Finally, the stringing device arranges and welds multiple battery cell diced pieces and multiple sets of solder ribbons according to a preset pattern to form a battery string.

[0028] In the above structure, through the cooperation between the feeding device, the vapor deposition device 200, the wafer carrier device 300, the tape making device and the stringing device, the passivated battery cells are produced in large scale by dividing and stringing according to the process of dicing, cutting vapor deposition and stringing. This also avoids the passivated battery cells being left unused for too long, which would affect the efficiency improvement.

[0029] In this embodiment of the application, the feeding device may include a dicing mechanism 110, a stacking mechanism 120 and a feeding mechanism 130 arranged in sequence. Specifically, the dicing mechanism 110 is used to dice the battery cells to form battery cell slices and transport them to the battery cell slice stacking mechanism 120; the stacking mechanism 120 is used to stack multiple battery cell slices into a material box and transport the material box to the feeding mechanism 130; the feeding mechanism 130 and the vapor deposition device 200 are arranged in sequence, and the feeding mechanism 130 is used to transport the material box to the vapor deposition device 200.

[0030] In the process of using the integrated equipment for passivation and welding of battery cells, firstly, the dicing mechanism 110 dices the battery cells to form battery cell slices and conveys them to the battery cell slice stacking mechanism 120; secondly, the stacking mechanism 120 stacks multiple battery cell slices into a material box and conveys the material box to the feeding mechanism 130, wherein the cut surfaces of multiple battery cell slices face one side; finally, the feeding mechanism 130 conveys the material box to the vapor deposition device 200.

[0031] The above structure uses a stacking mechanism 120 to stack multiple battery cells into a material box and then transports the material box to a feeding mechanism 130. The feeding mechanism 130 then transports the material box to the vapor deposition apparatus 200, thereby enabling multiple battery cells to be vapor deposited with passivation layers simultaneously, thus improving the vapor deposition efficiency of the battery cells.

[0032] In addition, the feeding mechanism 130 can be a belt feeder, roller feeder, chain plate feeder, etc., and this application does not impose any restrictions on it.

[0033] In a further technical solution, the stacking mechanism 120 may include a stacking hand 121, a loading platform 122, and a material box transporter 123. Specifically, the stacking hand 121 is movably disposed above the loading platform 122. The stacking hand 121 can stack multiple battery cells onto the material box carried by the loading platform 122, and the cross-sections of the multiple battery cells are coplanar. The loading platform 122 is raised and lowered relative to the stacking hand 121. The loading platform 122 is used to carry the material box. The material box transporter 123 is used to transport the material box carried by the loading platform 122 and the multiple battery cells to the feeding mechanism 130.

[0034] During the use of the above structure, the stacking hand 121 stacks multiple battery cells onto the material box carried by the loading platform 122, and the cross-sections of the multiple battery cells are coplanar. The stacking hand 121 can stack one by one or multiple cells simultaneously, and this application does not impose any restrictions on this. The loading platform 122 carries the material box and moves up and down relative to the stacking hand 121 to cooperate with the stacking action of the stacking hand 121. The material box transporter 123 transports the material box and multiple battery cells carried by the loading platform 122 to the feeding mechanism 130.

[0035] In another technical solution, the disclosed integrated equipment for passivation and welding of battery cells may further include a cassette circulation device 410, a wafer unloading hand 420, a unloading platform, and a feeding device 430. Specifically, the wafer unloading hand 420 is movably disposed above the unloading platform. The unloading platform is used to carry the cassette and multiple battery cells after vapor deposition treatment by the vapor deposition device 200. The wafer unloading hand 420 is used to separate multiple battery cells from the cassette and transport them to the upper part. The feeding device 430 is used to transport at least one battery cell to the wafer carrier 300. The cassette circulation device 410 is used to transport at least one cassette in an unloaded state carried by the unloading platform to the stacking mechanism 120.

[0036] During the use of the above structure, the unloading platform carries the material box after vapor deposition by the vapor deposition device 200 and multiple battery cell slices. The unloading hand 420 separates the multiple battery cell slices from the material box and transports them to the unloading device 430. The unloading device 430 transports at least one battery cell slice to the carrier device 300. The material box circulation device 410 transports at least one material box in an empty state carried by the unloading platform to the stacking mechanism 120, thereby realizing that multiple battery cell slices are separated from the material box at the same time, which facilitates the rapid recycling of the material box and improves work efficiency.

[0037] In this embodiment of the application, the vapor deposition apparatus 200 may include a vapor deposition furnace 210, a conveying mechanism and an annealing furnace 220. Specifically, the vapor deposition furnace 210 and the annealing furnace 220 are arranged in sequence. The conveying mechanism is used to transport the battery cells carried on the feeding device to the vapor deposition furnace 210 for vapor deposition treatment, and then transport the vapor-deposited battery cells to the annealing furnace 220 for annealing treatment.

[0038] During the use of the above structure, the conveying mechanism first transports the battery cells carried on the feeding device to the vapor deposition furnace 210 for vapor deposition treatment, then transports the vapor-deposited battery cells to the annealing furnace 220 for annealing treatment, and finally transports the annealed battery cells in the annealing furnace 220 to the wafer carrier 300.

[0039] In this embodiment, the wafer carrier 300 may include a sorting mechanism and multiple wafer carrier channels. The sorting mechanism is used to sort multiple battery cell wafers according to preset requirements and transport them to multiple wafer carrier channels respectively. By sorting and sorting the passivated battery cell wafers, it is beneficial to classify multiple battery cell wafers. The preset requirements may be color screening, whether there is microcrack screening, conversion efficiency screening, etc., and this application does not impose any restrictions on them.

[0040] In a further technical solution, the sorting mechanism may include a visual inspection sorting component and a conveying channel. Specifically, the visual inspection sorting component is disposed on the conveying channel, and the discharge end of the conveying channel is connected to the inlet end of multiple wafer carrier channels. The visual inspection sorting component can perform color detection or microcrack detection on the battery cells. This application does not impose any restrictions on this.

[0041] Of course, the visual inspection sub-component can be a 2D visual camera, a 3D visual camera, etc., and this application does not impose any restrictions on this.

[0042] In a further technical solution, the sorting mechanism may also include a PL detection sorting component, a vision detection sorting component, and a PL detection sorting component sequentially arranged in the conveyor channel. The PL detection sorting component can detect the conversion efficiency of the battery cells, thereby sorting multiple battery cells.

[0043] In this embodiment of the application, the stringing device may include a cell transfer hand 510, a ribbon transfer hand 520, a conveying mechanism 530, an infrared welding head 540, and a stringing knife assembly. The cell transfer hand 510 is used to transfer at least one cell to the conveying mechanism 530, the ribbon transfer hand 520 is used to transfer at least one set of ribbons to the conveying mechanism 530, and the infrared welding head 540 is used to weld multiple cell segments and multiple sets of ribbons arranged in a preset manner on the conveying mechanism 530 to form a battery string.

[0044] In the process of using the above structure, firstly, the cell transfer hand 510 transports at least one cell slice to the conveying mechanism 530, and the welding ribbon transfer hand 520 transports at least one set of welding ribbons to the conveying mechanism 530. Secondly, the infrared welding head 540 welds multiple cell slices and multiple sets of welding ribbons arranged in a preset manner on the conveying mechanism 530 to form a cell string. Finally, the string is cut to a preset string length by a string cutter to meet the module preparation requirements.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery cell slab passivation and welding integrated equipment, characterized in that, The device includes a feeding device, a vapor deposition device (200), a wafer carrier device (300), and a stringing device arranged sequentially. It also includes a tape-making device spaced apart from the wafer carrier device (300). The feeding device is used to cut the battery cells into wafer slices and transport them to the vapor deposition device (200). The vapor deposition device (200) is used to vapor deposit a passivation layer on the cross-section of the battery wafer slices and transport them to the wafer carrier device (300). The wafer carrier device (300) transports at least one of the battery wafer slices to the stringing device. The tape-making device is used to prepare at least one set of solder ribbons to the stringing device. The stringing device is used to arrange and weld multiple battery wafer slices and multiple sets of solder ribbons in a preset manner to form a battery string.

2. The integrated equipment for passivation and welding of battery cells according to claim 1, characterized in that, The feeding device includes a dicing mechanism (110), a stacking mechanism (120), and a feeding mechanism (130) arranged in sequence. The dicing mechanism (110) is used to dice the battery cells to form battery cell slices and to transport the battery cell slices to the stacking mechanism (120). The stacking mechanism (120) is used to stack multiple battery cell slices into a material box and to transport the material box to the feeding mechanism (130). The feeding mechanism (130) is used to transport the material box to the vapor deposition device (200).

3. The integrated equipment for passivation and welding of battery cells according to claim 2, characterized in that, The stacking mechanism (120) includes a stacking hand (121), a loading platform (122), and a material box transporter (123). The stacking hand (121) is movably disposed above the loading platform (122). The stacking hand (121) can stack multiple battery cells onto the material box carried by the loading platform (122), and the cross-sections of the multiple battery cells are coplanar. The loading platform (122) is raised and lowered relative to the stacking hand (121). The loading platform (122) is used to carry the material box. The material box transporter (123) is used to transport the material box and multiple battery cells carried by the loading platform (122) to the feeding mechanism (130).

4. The integrated equipment for passivation and welding of battery cells according to claim 2, characterized in that, It also includes a material box circulation device (410), a wafer unloading hand (420), a material unloading platform, and a material feeding device (430). The wafer unloading hand (420) is movably disposed above the material unloading platform. The material unloading platform is used to carry the material box and multiple battery cell wafers after vapor deposition treatment by the vapor deposition device (200). The wafer unloading hand (420) is used to separate multiple battery cell wafers from the material box and transport them to the material feeding device (430). The material feeding device (430) is used to transport at least one battery cell wafer to the wafer carrier device (300). The material box circulation device (410) is used to transport at least one material box in an unloaded state carried by the material unloading platform to the stacking mechanism (120).

5. The integrated equipment for passivation and welding of battery cells according to claim 1, characterized in that, The vapor deposition apparatus (200) includes a vapor deposition furnace (210), a conveying mechanism, and an annealing furnace (220). The vapor deposition furnace (210) and the annealing furnace (220) are arranged in sequence. The conveying mechanism is used to transport the battery cells carried on the feeding device to the vapor deposition furnace (210) for vapor deposition treatment, and then transport the vapor-deposited battery cells to the annealing furnace (220) for annealing treatment.

6. The integrated equipment for passivation and welding of battery cells according to claim 1, characterized in that, The wafer carrier device (300) includes a sorting mechanism and multiple wafer carrier channels. The sorting mechanism is used to sort multiple solar cells according to preset requirements and transport them to the multiple wafer carrier channels respectively.

7. The integrated equipment for passivation and welding of battery cells according to claim 6, characterized in that, The sorting mechanism includes a visual inspection sorting component and a conveying channel. The visual inspection sorting component is disposed on the conveying channel, and the discharge end of the conveying channel is connected to the inlet end of the plurality of the carrier channels.

8. The integrated equipment for passivation and welding of battery cells according to claim 7, characterized in that, The sorting mechanism also includes a PL detection sorting component, and the visual detection sorting component and the PL detection sorting component are sequentially arranged on the conveying channel.

9. The integrated equipment for passivation and welding of battery cells according to claim 1, characterized in that, The string welding device includes a wafer handler (510), a ribbon handler (520), a conveying mechanism (530), and an infrared welding head (540). The wafer handler (510) is used to transport at least one of the battery wafers to the conveying mechanism (530). The ribbon handler (520) is used to transport at least one set of ribbons to the conveying mechanism (530). The infrared welding head (540) is used to weld multiple battery wafers and multiple sets of ribbons arranged on the conveying mechanism (530) in the preset manner to form the battery string.

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