Battery piece production process and production line

Abstract

The invention relates to the field of photovoltaic cells, in particular to a battery piece production process and production line, and the production process comprises the steps: punching a raw material piece, and forming a welding strip assembly; arranging the welding strip assembly on a battery piece, or arranging the battery piece on the welding strip assembly; and welding the solder strip assembly to the battery piece to obtain the battery piece with the solder strip. The technical problems that welding strip machining and welding equipment is complex in structure and low in efficiency are solved, and the technical effects that the structure of the welding strip machining and welding equipment is simplified, and the machining and production efficiency is improved are achieved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cells, and in particular to a cell production process and production line. Background Art

[0002] With the development of photovoltaic technology, in order to improve the power conversion rate of battery cells, multiple battery cells are stacked on each other and welded together through welding strips to form a battery string; therefore, in order to meet the above process requirements, welding equipment for welding battery cells to form a battery string was born.

[0003] In the prior art, battery cells are connected to each other through welding ribbons. First, the welding ribbons need to be welded on the flat battery cells. Therefore, the welding ribbons need to be arranged on the surface of the battery cells, and the welding between the welding ribbons and the battery cells is completed after heating and curing. The steps of welding the welding ribbons include pulling the welding ribbons, cutting the welding ribbons, transferring the welding ribbons, arranging and placing the welding ribbons, and welding process steps. The welding ribbons themselves are flexible and have a small diameter. After cutting, the welding ribbons are transferred and arranged between manipulators. Therefore, the manipulators for clamping the welding ribbons need to be provided with multiple groups of clamping structures to clamp multiple groups of welding ribbons, resulting in a bloated and complicated structure of the welding equipment and increased costs. When there is a need to weld multiple (for example: >100) fine grids on the battery cell to the welding ribbons, the efficiency of welding ribbon arrangement and welding is greatly reduced.

[0004] Therefore, the technical problems of the prior art are that the welding strip processing and welding equipment have complex structures and low efficiency. Summary of the invention

[0005] The present application provides a battery cell production process and production line, which solves the technical problems of complex structure and low efficiency of solder strip processing and welding equipment, and achieves the technical effect of simplifying the complex structure of solder strip processing and welding equipment and improving processing and production efficiency.

[0006] In the first aspect, the present application provides a battery cell production process, which adopts the following technical solution:

[0007] A battery cell production process comprises: punching a raw material sheet to form a welding ribbon assembly; arranging the welding ribbon assembly on the battery cell; welding the welding ribbon assembly to the battery cell to obtain a battery cell with welding ribbons.

[0008] Preferably, the welding ribbon assembly comprises a plurality of welding ribbons, and adjacent welding ribbons are connected to each other via a connecting portion, and the welding ribbons and the connecting portion are integrally formed.

[0009] Preferably, the welding strip assembly further comprises a bus bar, which is arranged at one end of the welding strip in the length direction, the bus bar is connected to the end of each welding strip, and the bus bar and the welding strip are integrally formed.

[0010] Preferably, the method further comprises: fixing the welding ribbon assembly; and cutting each of the connecting portions so that the connecting portions between adjacent welding ribbons are interrupted.

[0011] Preferably, fixing the solder ribbon assembly comprises: clamping the solder ribbon of the solder ribbon assembly; and / or adsorbing the solder ribbon of the solder ribbon assembly.

[0012] Preferably, the surface of the raw material sheet is coated with a welding film, and the welding film is heated and melted to contact the battery sheet to be welded on the battery sheet.

[0013] In the second aspect, the present application provides a battery cell production line, which adopts the following technical solution:

[0014] A battery cell production line comprises: a punching mechanism, the punching mechanism having a punching station located at the punching station, the punching mechanism being used to punch a raw material sheet to form a welding strip assembly; a welding mechanism, the welding mechanism having a welding station located at the welding station, the welding mechanism being used to weld the welding assembly to the battery cell; and a transfer mechanism, the transfer mechanism being used to input and output the battery cells and / or welding strip assemblies at each station.

[0015] Preferably, the punching mechanism comprises: a first carrier, the first carrier having a first molding part; the first molding part comprising a welding strip area and a connecting area, the welding strip area having a plurality of welding strip areas, the connecting area being connected between two adjacent welding strip areas; a second carrier, the second carrier being located on one side of the first carrier, the second carrier having a second molding part, the second molding part and the first molding part being arranged relative to each other, and a molding space being formed between the second molding part and the first molding part; wherein, the first carrier can be close to or away from the second carrier to form at least a first state, in the first state: the first molding part is in contact with the second molding part, so that the raw material sheet located in the molding space is squeezed by the first molding part and the second molding part to form a welding strip assembly, the welding strip assembly comprising a welding strip corresponding to the welding strip area and a connecting part corresponding to the connecting area, and the welding strip is connected through the connecting part.

[0016] Preferably, the first molding part further includes: a busbar area, which is connected to each of the welding strip areas, so that the welding strip assembly formed by extruding the raw material sheet by the first molding part and the second molding part has a busbar corresponding to the busbar area, and the busbar is connected to each of the welding strips.

[0017] Preferably, it further comprises: a cutting mechanism, the cutting mechanism comprising: a fixing component, the fixing component is used to fix the welding strip component; and a cutting component, the cutting component is used to cut and interrupt the connection between adjacent welding strips.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. The present application provides a battery cell production process, which produces a solder strip assembly by adopting a method of punching a raw material sheet. According to the quantity requirement of the solder strips, different punching die carriers can be used to obtain the quantity, shape and structure of the solder strips that meet various needs. The solder strip assembly formed at one time has a large number of solder strips, which can be transferred as a whole to the battery cell for transportation. Compared with the method of laying out the solder strips in sequence in the prior art, the efficiency of solder strip processing and laying is greatly improved, and the production efficiency of the battery cell is also improved.

[0020] 2. The solder strips of the punched solder strip assembly are connected by connecting parts, which are punched by a punching device and formed integrally with the solder strips, thereby improving the overall stable structure and layout accuracy of the solder strip assembly, avoiding the dislocation and skew of punching and independent solder strips, and improving the processing accuracy and yield rate of the battery cells.

[0021] 3. Cut and break the connection between the solder ribbon assemblies, fix the solder ribbon assemblies by adsorption or clamping, so that the solder ribbon assemblies have their original posture, prevent the solder ribbons from being skewed or misaligned, drive the battery cells to be arranged on the solder ribbon assemblies, further stabilize the solder ribbon positions, and improve the processing accuracy and yield rate of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the first flow chart of the battery cell production process described in this application;

[0023] Figure 2 is the second flow chart of the battery cell production process described in this application;

[0024] Figure 3 It is a schematic diagram of the battery cell production line described in this application;

[0025] Figure 4 is a schematic diagram of the welding ribbon assembly described in this application;

[0026] Figure 5 It is a schematic diagram of the punching mechanism of the battery cell production line described in this application;

[0027] Explanation of the reference numerals: 100, raw material sheet; 200, solder ribbon assembly; 210, solder ribbon; 220, connection portion; 230, bus bar; 300, battery cell; 400, punching mechanism; 410, first carrier; 420, second carrier; 500, cutting mechanism; 510, cutting table; 520, clamping plate; 600, welding mechanism; 700, transfer mechanism. DETAILED DESCRIPTION

[0028] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] The embodiments of the present application provide a battery cell production process and production line, which solve the technical problems of complex structure and low efficiency of solder strip processing and welding equipment, and achieve the technical effect of simplifying the complex structure of solder strip processing and welding equipment and improving processing and production efficiency.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0032] In order to realize the shingled production of battery cells, it is necessary to weld the welding strips on the battery cells. Therefore, welding equipment for the welding strips or auxiliary equipment for welding the welding strips are born. The current mainstream welding strip arrangement technology is divided into the following steps: pulling the welding strips, cutting the welding strips, transferring the welding strips, arranging and placing the welding strips, and welding the welding strips. For example, the automatic welding strip arrangement device and stringing machine designed by Ningxia Xiaoniu Automation Equipment Co., Ltd., in which the automatic welding strip arrangement device includes a welding strip cutting device, a welding strip arrangement device, a welding table, and a traction table. The welding strips are grasped and placed by using a grasping and placing mechanism in the welding strip arrangement device that can translate and displace perpendicular to the direction of the welding strip line. The cutting mechanism is used to cut the entire welding strip into multiple sections so that the welding strip can be accurately arranged on the grid line of the battery cell; Zhongneng Chuang Optoelectronics Technology (Changzhou) Co., Ltd. proposed a multi-busbar series connection device with multiple wirings and a series connection method for battery strings. The multi-busbar series connection device includes a series connection workbench and a busbar line wiring mechanism. The busbar line wiring mechanism is used to wire the busbars in a first direction, and also includes a movable wiring preparation table, an auxiliary line wiring mechanism and an auxiliary line connection mechanism. The movable wiring preparation table can be moved in a second direction perpendicular to the first direction under the drive of a driving mechanism. Multiple wirings are achieved by moving the movable wiring preparation table.

[0033] The front electrode of the solar cell is formed by printing silver fine grid lines and main grid lines using screen printing technology. Multi-busbar technology usually refers to solar cell and module technology with 6 or more main grid lines. By increasing the number of main grids and reducing the width and height of the main grid, the amount of silver paste used can be reduced, the light-receiving area can be increased, and the resistance loss can be reduced. Based on the multi-busbar technology (MBB), super-multi-busbar technology (SMBB) has also been developed, that is, the number of main grid lines is 12 or more, and even reaches 15 or 20 grids. The level of electrode preparation and module packaging technology has not exceeded 30 grids. With the further iteration of battery technology, there is a demand to directly weld more than 100 fine grids on the battery cell to the welding ribbon, so as to further achieve the purpose of increasing efficiency and reducing costs, but current technologies cannot meet this requirement.

[0034] The above equipment and methods are all used for welding battery cell welding strips. The problems existing in this process are: 1. The wiring mechanism of the welding strip has poor scalability and cannot meet the increasing demand for the number of multi-wire welding strips, for example: it cannot meet the increasing demand for the number of welding strips (>30 grids); 2. For multi-grid battery cell welding strips, the existing welding strip technology requires a corresponding number of welding strip feeding carriers, which not only makes it difficult to replace the welding strips, but also occupies a large space and has high costs; 3. Each welding requires the laying of welding strips, and the welding strip laying structure is complex. When the number of welding strips is large, the process of laying welding strips is time-consuming and inefficient. Therefore, the present application proposes a new type of welding strip production line and laying method to address the deficiencies of the prior art.

[0035] The present application provides a battery cell 300 production process, such as Figure 1 As shown, including:

[0036] S1, punching the raw material sheet 100 to form a welding ribbon assembly 200;

[0037] S2, placing the welding ribbon assembly 200 on the battery cell 300, or placing the battery cell 300 on the welding ribbon assembly 200;

[0038] S3 , welding the soldering ribbon assembly 200 onto the battery cell 300 to obtain the battery cell 300 with the soldering ribbon 210 .

[0039] Specifically, before punching the raw material sheet 100, the raw material sheet 100 is first processed: the raw material sheet 100 is selected, and a welding film is plated on the front and back sides of the raw material sheet 100; in one embodiment, the raw material sheet 100 is generally selected as a copper sheet with good flexibility and conductivity, and a welding film is plated on the front and back sides of the copper sheet, so that the welding strip assembly 200 formed by punching also has a welding film, wherein the welding film refers to a conductive metal layer plated on the front and back sides of the copper sheet, the welding film is melted by heat and contacts the battery cell 300, and the welding with the battery cell 300 is completed after cooling. Generally, the welding film can be a conductive metal film such as a tin film.

[0040] After punching in step S1, Figure 2-4 As shown, a solder strip assembly 200 is obtained. Specifically, the punching mechanism 400 acts on the raw material sheet 100 to obtain the solder strip assembly 200, which includes a solder strip 210 and a connecting portion 220. In each solder strip assembly 200, there are multiple solder strips 210, and the multiple solder strips 210 are connected by the connecting portion 220. Specifically, the connecting portion 220 is arranged between adjacent solder strips 210, so that the adjacent solder strips 210 are connected and fixed by the connecting portion 220. In other words, the relative position between the solder strips 210 and the solder strips 210 maintaining such a stable posture are determined by the connecting portion 220, that is, during the transportation process of the solder strip assembly 200, due to the existence of the connecting portion 220, the relative position between the solder strips 210 is fixed, and the solder strips 210 will not be skewed or disordered; wherein, the connecting portion 220 and the solder strip 210 are punched and integrally formed by the punching mechanism 400. Furthermore, regarding the arrangement of the welding strips 210, generally, the welding strips 210 are arranged in a straight line, and each welding strip 210 is of equal length, and multiple welding strips 210 are parallel to each other and maintain equal spacing. The number of welding strips 210 is determined by the process requirements, that is, the processing requirements of the battery cell 300 are a certain number of welding strips 210, and the punching mechanism 400 punches the required number of welding strips 210. After the punching, the welding strip assembly 200 passes through a certain process (for example, the process of cutting the connecting portion 220 in the present application), and is transferred as a whole to the battery cell 300 for welding. Compared with the prior art, there is no need to arrange the welding strips 210, which greatly improves the efficiency of the arrangement of the welding strips 210 and the processing of the battery cell 300.

[0041] In another embodiment, Figure 2-4 As shown, the welding ribbon assembly 200 includes a welding ribbon 210, a connecting portion 220 and a bus bar 230. On the basis of the above-mentioned welding ribbon 210 embodiment, it also includes a bus bar 230. The bus bar 230 is arranged on one end of the welding ribbon 210 of the welding ribbon assembly 200 extending in the length direction. The bus bar 230 is arranged in a straight line. The bus bar 230 is connected to the end of each welding ribbon 210, and the bus bar 230 and the welding ribbon 210 are integrally formed. Regarding the punching of the bus bar 230, a corresponding area for punching the bus bar 230 can be set on the punching mechanism 400, so that the welding ribbon assembly 200 with the bus bar 230 is punched and formed, and there is no need to weld the bus bar 230 in the subsequent battery cell 300 processing process, which further improves the processing efficiency of the battery cell 300.

[0042] Before S2, Figure 2 As shown, the process also includes processing the solder ribbon assembly 200: fixing the solder ribbon assembly 200; cutting each connection portion 220 so that the connection portions 220 between adjacent solder ribbons 210 are interrupted. After the punching mechanism 400 punches the raw material sheet 100, the solder ribbon assembly 200 is obtained, and the transfer mechanism 700 grabs the solder ribbon assembly 200 to the cutting station.

[0043] Further, it includes S1-1: fixing the solder ribbon assembly 200. The solder ribbon assembly 200 is clamped by the cutting table 510, and the clamped solder ribbon assembly 200 can be in the form of a clamping plate 520 or a pressing plate, which is mostly used on each solder ribbon 210, and the clamping position of the clamping plate 520 is staggered from the connecting portion 220 of the solder ribbon assembly 200, that is, the clamping plate 520 does not cover the connecting portion 220; and / or, the cutting table 510 can also be provided with a vacuum adsorption hole to adsorb the solder ribbon assembly 200 so as to achieve the fixation of the solder ribbon assembly 200.

[0044] Next, it includes S1-2: cutting the connection part 220. Through visual recognition and obtaining the position of the connection part 220, the connection part 220 is cut by laser, so that the connection part 220 is broken, that is, the connection part 220 is cut and broken by laser, so that the adjacent welding strips 210 are independent of each other (excluding the connection with the bus bar 230). In other words, the connection part 220 between any adjacent welding strips 210 is interrupted by the laser, and when the welding strips 210 are welded on the battery cell 300, the welding strips 210 are not connected to each other (excluding the connection with the bus bar 230).

[0045] In S2, as an embodiment, the transfer mechanism 700 grabs the solder ribbon 210 to the welding station and arranges the solder ribbon assembly 200 on the battery cell 300. It is worth noting that the input and output of the solder ribbon assembly 200 between each station can be achieved by using the same transfer mechanism 700, or by setting up multiple transfer mechanisms 700.

[0046] In another embodiment, the transfer mechanism 700 grabs the battery cell 300 and arranges the battery cell 300 on the welding ribbon assembly 200, that is, the battery cell 300 moves while the welding ribbon assembly 200 remains in position, so as to prevent the welding ribbon 210 from changing position during the transfer process and causing a decrease in welding accuracy.

[0047] In S3, the soldering ribbon assembly 200 and the battery cell 300 are welded. Specifically, a heating mechanism is provided on the welding station. The heating mechanism can adopt an infrared heater. By heating the soldering ribbon assembly 200 and the battery cell 300, the soldering film plated on the surface of the soldering ribbon assembly 200 melts and contacts the battery cell 300. After cooling, the soldering ribbon assembly 200 and the battery cell 300 are welded.

[0048] The present application also provides a battery cell 300 production line, such as Figure 3 As shown, it is used to cooperate in realizing the above-mentioned battery cell 300 production process, including a punching mechanism 400, a cutting mechanism 500, a welding mechanism 600 and a transfer mechanism 700; the punching mechanism 400 is used to punch the raw material sheet 100 to obtain the welding ribbon assembly 200; the cutting mechanism 500 is used to cut and interrupt the connecting portion 220 between two adjacent welding ribbons 210; the welding mechanism 600 is used to heat the battery cell 300 and the welding ribbon assembly 200, so that the welding ribbon assembly 200 is welded on the battery cell 300; the transfer mechanism 700 is used to input and output the battery cell 300 or the welding ribbon assembly 200 at the processing station of each mechanism.

[0049] Punching mechanism 400, such as Figure 3-5 As shown, the punching mechanism 400 is used to punch the raw material sheet 100 to obtain the solder ribbon assembly 200. The punching mechanism 400 punches the raw material sheet 100 into the required solder ribbon assembly 200 with a preset mold. Specifically, the punching mechanism 400 includes a first carrier 410, a second carrier 420 and a driving assembly. The first carrier 410 and the second carrier 420 serve as the main carrier molds of the punching mechanism 400. The solder ribbon assembly 200 is obtained by the first carrier 410 and the second carrier 420 cooperating to punch the raw material sheet 100. The driving assembly is used to realize the relative movement between the first carrier 410 and the second carrier 420.

[0050] The first carrier 410, such as Figure 5As shown, the first carrier 410 has a first molding portion, and a punching tool head is arranged on the first molding portion. The punching tool head includes a solder strip 210 area and a connection area. There are multiple solder strip 210 areas, and the solder strip 210 areas correspond to the solder strips 210 arranged parallel to each other between the solder strip 210 assemblies; the connection area is located between every two adjacent solder strip 210 areas, and every two adjacent solder strip 210 areas are connected through the connection area, and the connection area corresponds to the connection part 220 of the solder strip assembly 200. With such an arrangement, after punching, the solder strip assembly 200 has the solder strip 210 and the connection part 220, and the adjacent solder strips 210 are connected through the connection part 220.

[0051] The second carrier 420, such as Figure 5 As shown, the second carrier 420 is located on one side of the first carrier 410, and the second carrier 420 has a second molding part. The second molding part and the first molding part are arranged oppositely, and a molding space is formed between the second molding part and the first molding part. The molding space is a punching station. The transfer mechanism 700 grabs the raw material sheet 100 and inputs the raw material sheet 100 into the molding space, and is squeezed and punched by the first molding part and the second molding part to form the solder ribbon assembly 200. In one embodiment, the first carrier 410 and the second carrier 420 are arranged up and down, and the first molding part and the second molding part are arranged oppositely. When the first carrier 410 is pressed down, the first molding part acts on the raw material sheet 100 on the second molding part, thereby punching out the solder ribbon assembly 200, so that the solder ribbon assembly 200 has a solder ribbon 210 corresponding to the solder ribbon 210 area and a connecting part 220 corresponding to the connecting area.

[0052] Furthermore, the punching head also includes a busbar area, which is arranged at one end of the extension direction of the welding strip 210 area, and the busbar area is connected to each welding strip 210 area, so that the welding strip assembly 200 formed by punching the raw material sheet 100 by the first molding part and the second molding part has a busbar 230 corresponding to the busbar area, and the busbar 230 is connected to each welding strip 210.

[0053] The driving assembly is used to realize the relative movement between the first carrier 410 and the second carrier 420. In one embodiment, the driving assembly can use a mechanism such as a cylinder to drive the first carrier 410 to move relative to the second carrier 420.

[0054] Cutting mechanism 500, such as Figure 3As shown, the cutting mechanism 500 is used to cut and break the connection portion 220 between two adjacent welding strips 210 . The cutting mechanism 500 has a cutting station, and the transfer mechanism 700 inputs the solder tape assembly 200 after punching to the cutting station. The cutting mechanism 500 is located at the cutting station to cut the solder tape assembly 200. Specifically, the cutting mechanism 500 includes a fixing assembly and a cutting assembly. The fixing assembly is used to position the solder tape assembly 200; the cutting assembly is used to cut and interrupt the connecting portion 220 between adjacent solder tapes 210; in one embodiment, the fixing assembly includes a cutting table 510, and the cutting table 510 is in the form of a clamping plate 520 or a pressing plate and is mostly used on each solder tape 210. The clamping position of the clamping plate 520 is staggered with the connecting portion 220 of the solder tape assembly 200, that is, the clamping plate 520 does not cover the connecting portion 220; and / or, the cutting table 510 can also be provided with a vacuum adsorption hole to adsorb the solder tape assembly 200 so as to fix the solder tape assembly 200. The cutting assembly is used to cut the connection portion 220 between the welding strips 210 . In one embodiment, the cutting assembly cuts and interrupts the connection portion 220 by laser cutting.

[0055] Welding mechanism 600, such as Figure 3 As shown, the welding mechanism 600 is used to heat the battery cell 300 and the welding ribbon assembly 200, so that the welding ribbon assembly 200 is welded to the battery cell 300. The welding mechanism 600 has a welding station, and the transfer mechanism 700 grabs the battery cell 300 and the welding ribbon assembly 200 to the welding station. The welding station is provided with a heating mechanism, and the heating mechanism can use an infrared heater. By heating the welding ribbon assembly 200 and the battery cell 300, the welding film plated on the surface of the welding ribbon assembly 200 melts and contacts the battery cell 300, and the welding of the welding ribbon assembly 200 and the battery cell 300 is completed after cooling.

[0056] Optionally, the cell 300 can also be grabbed onto the cut solder ribbon assembly 200, while the position of the solder ribbon assembly 200 remains unchanged, to prevent the solder ribbon 210 from changing position during the transfer process and causing a decrease in welding accuracy. In this case, the cutting station is also a welding station.

[0057] Transfer mechanism 700, such as Figure 3 As shown, the transfer mechanism 700 is used for inputting and outputting the battery cell 300 or the welding ribbon assembly 200 at the processing stations of each mechanism. In one embodiment, the transfer mechanism 700 can be a manipulator, which can clamp or absorb the welding ribbon assembly 200, and can also clamp or absorb the battery cell 300, for inputting and outputting the welding ribbon assembly 200 and / or the battery cell 300 at each station.

[0058] Working principle / steps:

[0059] The present application adopts the method of punching out the raw material sheet 100 to obtain the solder ribbon assembly 200, arranges the solder ribbon assembly 200 on the battery cell 300, or arranges the battery cell 300 on the solder ribbon assembly 200, transfers the solder ribbon assembly 200 as a whole, avoids arranging the solder ribbons 210 one by one, improves the production and arrangement efficiency of the solder ribbon 210, welds the solder ribbon assembly 200 on the battery cell 300, and obtains the battery cell 300 with the solder ribbon 210.

[0060] Technical effects:

[0061] 1. The present application provides a production process for a battery cell 300, which produces a solder strip assembly 200 by adopting a method of punching a raw material sheet 100. According to the quantity requirement of the solder strips 210, different punching die carriers can be used to obtain the quantity of solder strips 210 and the shape and structure requirements of the solder strips 210 that meet various needs. The solder strip assembly 200 formed at one time has a large number of solder strips 210, which can be transferred as a whole to the battery cell 300 for transportation. Compared with the method of laying out the solder strips 210 in sequence in the prior art, the processing and laying efficiency of the solder strips 210 is greatly improved, and the production efficiency of the battery cell 300 is also improved.

[0062] 2. The solder strips 210 of the punched solder strip assembly 200 are connected by the connecting portion 220. The connecting portion 220 is punched by a punching device and formed integrally with the solder strip 210, thereby improving the overall stable structure and layout accuracy of the solder strip assembly 200, avoiding the misalignment and skewness of the punched and independent solder strips 210, and improving the processing accuracy of the battery cell 300 and the yield rate of the battery cell 300.

[0063] 3. Cut and break the connection part 220 between the solder ribbon assemblies 200, fix the solder ribbon assemblies 200 by adsorption or clamping, so that the solder ribbon assemblies 200 have their original posture, prevent the solder ribbons 210 from being skewed or misaligned, drive the battery cells 300 to be arranged on the solder ribbon assemblies 200, further stabilize the position of the solder ribbons 210, and improve the processing accuracy and yield rate of the battery cells 300.

[0064] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A battery cell production process, characterized in that: include: Punching a raw material sheet (100) to form a welding ribbon assembly (200); Arranging the welding ribbon assembly (200) on the battery cell (300), or arranging the battery cell (300) on the welding ribbon assembly (200); The welding ribbon assembly (200) is welded to the battery cell (300) to obtain a battery cell (300) having a welding ribbon (210).

2. A battery cell production process according to claim 1, characterized in that: The welding strip assembly (200) comprises a plurality of welding strips (210), and adjacent welding strips (210) are connected to each other via a connecting portion (220), and the welding strips (210) and the connecting portion (220) are integrally formed.

3. A battery cell production process according to claim 2, characterized in that: The welding strip assembly (200) further comprises a bus bar (230), wherein the bus bar (230) is arranged at one end of the welding strip (210) in the length direction, the bus bar (230) is connected to the end of each welding strip (210), and the bus bar (230) and the welding strip (210) are integrally formed.

4. A battery cell production process according to claim 2, characterized in that: Also includes: Fixing the welding ribbon assembly (200); Each of the connecting portions (220) is cut so that the connecting portions (220) between adjacent welding strips (210) are interrupted.

5. A battery cell production process according to claim 4, characterized in that: The fixing of the welding ribbon assembly (200) comprises: clamping a welding ribbon (210) of the welding ribbon assembly (200); and / or, Adsorbing the soldering ribbon (210) of the soldering ribbon assembly (200).

6. A battery cell production process according to claim 1, characterized in that: The surface of the raw material sheet (100) is plated with a welding film, and the welding film is heated and melted to contact the battery sheet (300) so as to be welded on the battery sheet (300).

7. A battery cell production line, characterized in that: include: A punching mechanism (400), the punching mechanism (400) having a punching station, located on the punching station, the punching mechanism (400) being used for punching a raw material sheet (100) to form a welding ribbon assembly (200); A welding mechanism (600), the welding mechanism (600) having a welding station, located on the welding station, the welding mechanism (600) being used to weld the welding assembly onto the battery cell (300); and A transfer mechanism (700) is used for inputting and outputting battery cells (300) and / or welding ribbon assemblies (200) at various workstations.

8. A battery cell production line according to claim 7, characterized in that: The punching mechanism (400) comprises: A first carrier (410), the first carrier (410) having a first molding portion; the first molding portion comprises a welding strip (210) area and a connection area, the welding strip (210) area having a plurality of areas, the connection area being connected between two adjacent welding strip (210) areas; a second carrier (420), the second carrier (420) being located on one side of the first carrier (410), the second carrier (420) having a second molding portion, the second molding portion and the first molding portion being arranged opposite to each other, and a molding space being formed between the second molding portion and the first molding portion; The first carrier (410) can be moved closer to or farther from the second carrier (420) to form at least a first state. In the first state, the first molding portion abuts against the second molding portion, so that the raw material sheet (100) located in the molding space is squeezed by the first molding portion and the second molding portion to form a solder strip assembly (200). The solder strip assembly (200) includes a solder strip (210) corresponding to the solder strip (210) area and a connecting portion (220) corresponding to the connecting area. The solder strip (210) is connected via the connecting portion (220).

9. A battery cell production line according to claim 8, characterized in that: The first forming part further includes: A busbar area is connected to each of the welding strips (210), so that the welding strip assembly (200) formed by extruding the raw material sheet (100) by the first molding part and the second molding part has a busbar (230) corresponding to the busbar area, and the busbar (230) is connected to each of the welding strips (210).

10. The battery cell production line according to claim 7, characterized in that: Also includes: A cutting mechanism (500), wherein the cutting mechanism (500) comprises: A fixing assembly, the fixing assembly being used to fix the welding ribbon assembly (200); A cutting assembly is provided, wherein the cutting assembly is used to cut and interrupt the connection portion (220) between adjacent welding strips (210).

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