Battery string preparation device and string welding equipment

Abstract

The present application discloses a battery string preparation device, including a battery cell feeding device, a welding strip feeding device and a laminating device; the battery cell feeding device supplies battery cells, the welding strip feeding device supplies welding strips, the battery cells and welding strips are laid together to form a string welding unit; the laminating device can receive the string welding unit and make the string welding unit laminating, thereby conveniently preparing a battery string. The present application also discloses a string welding device, including the above-mentioned battery string preparation device, and also including a welding device, which is arranged downstream of the laminating device, and can weld the constructed string welding unit, thereby conveniently realizing the shaping of the battery string.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic equipment, and in particular to a battery string preparation device and string welding equipment. Background Art

[0002] When preparing battery strings by traditional methods, refer to Figure 1 Usually, a battery cell 1' is laid out first, and then a welding ribbon 2' is laid on the battery cell 1', and the second end of the welding ribbon 2' falls behind the battery cell 1'; then, a battery cell 1" is laid out, and the battery cell 1" covers the second end of the laid welding ribbon 2', and then the welding ribbon 2" is laid on the battery cell 1", and similarly, the second end of the welding ribbon 2" falls behind the battery cell 1"; then, a battery cell 1"' is laid on the second end of the welding ribbon 2", and a welding ribbon 2"' is laid on the battery cell 1"'... In this way, one battery cell and one welding ribbon are laid out one by one to finally form a battery string.

[0003] The preparation method of this type of battery string is inefficient. Summary of the invention

[0004] The present application provides a battery string preparation device and a string welding device to solve the problem of low efficiency of battery string preparation in the prior art.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a battery string preparation device, which includes: a battery cell feeding device for supplying battery cells; a welding strip feeding device for supplying welding strips; a stacking device, which is arranged downstream of the battery cell feeding device and the welding strip feeding device, and can receive the battery cells supplied by the battery cell feeding device and the welding strips supplied by the welding strip feeding device; the stacking device includes: a stacking table for receiving a string welding unit composed of battery cells and welding strips; a stacking drive mechanism, which can stack the string welding units; wherein the string welding units are formed by laying out battery cells and welding strips; in any string welding unit, the first end of the welding strip is on the battery cell, and the second end protrudes from the battery cell; multiple string welding units are stacked to form a battery string; in the battery string, for any two adjacent string welding units, the battery cells of one string welding unit are stacked on the second end of the welding strip of the other string welding unit.

[0006] Furthermore, the battery cell loading device includes: a battery cell conveying mechanism for conveying battery cells; a battery cell transporting mechanism for extracting battery cells on the battery cell conveying mechanism and capable of feeding the battery cells into the stacking device; the battery cell transporting mechanism includes: a battery cell extractor for extracting battery cells; a battery cell transporting driving member connected to the battery cell extractor and capable of driving the battery cell extractor to extract and transfer battery cells; a detection member, wherein the working end of the detection member is facing the battery cell conveying mechanism and can detect the status of the battery cells on the battery cell conveying mechanism, so that the battery cell transporting driving member drives the battery cell extractor to accurately extract and transfer the battery cells.

[0007] Furthermore, the battery cell transport mechanism includes a plurality of battery cell extraction members, which are arranged in a straight line and at intervals at the active end of the battery cell transport drive member; the detection member adopts a CCD camera, which can take pictures of the battery cells on the battery cell conveying mechanism to obtain the position status of the battery cells; the battery cell transport drive member adopts a robot, which can control the plurality of battery cell extraction members to extract or release the battery cells one by one; according to the position status of the battery cells, the robot can adjust the direction of the battery cell extraction member so as to unify the position status of the battery cells extracted by the plurality of battery cell extraction members.

[0008] Furthermore, the solder tape feeding device includes: a solder tape unwinding mechanism for releasing the solder tape material; a solder tape cutting mechanism, which is arranged downstream of the solder tape unwinding mechanism and can cut the solder tape material; a solder tape pulling mechanism, which can pull the solder tape material out from the solder tape unwinding mechanism and pull the solder tape material through the solder tape cutting mechanism to facilitate the solder tape cutting mechanism to cut the solder tape material.

[0009] Furthermore, the solder strip feeding device also includes a solder strip bending mechanism, which is arranged downstream of the solder strip unwinding mechanism and can bend the solder strip material strip or the solder strip so that the extension directions of the first end of the solder strip and the second end of the solder strip are no longer collinear.

[0010] Furthermore, the stacking device includes a plurality of stacking tables, which are arranged in a straight line and can respectively bear a series welding unit; the stacking driving mechanism includes: a stacking lifting mechanism, which is connected to the stacking tables and can drive the stacking tables to move in a vertical direction; wherein any stacking table can move in a vertical direction under the drive of the stacking lifting mechanism; or, one of the stacking tables is relatively fixed in the vertical direction; a stacking translation mechanism, which is connected to the stacking tables and can drive the stacking tables to move in a straight line direction; wherein any stacking table can move in a straight line direction under the drive of the stacking translation mechanism; or, one of the stacking tables is relatively fixed in the straight line direction; the straight line direction is the arrangement direction of the plurality of stacking tables.

[0011] Furthermore, the battery string preparation device is characterized in that it also includes a pressing mesh circulation device, which can supply the pressing mesh to the stacking device; the pressing mesh circulation device includes: a pressing mesh loading mechanism, which is arranged on one side of the stacking device and can transport the pressing mesh to the stacking device; a pressing mesh conveying mechanism, which can convey the pressing mesh to the pressing mesh loading mechanism; after the battery cell and the welding strip are laid together, the welding strip can be pressed onto the battery cell through the pressing mesh.

[0012] Furthermore, the screen pressing circulation device also includes a screen pressing distance variable mechanism, which is arranged on one side of the screen pressing transmission mechanism, can receive the screen pressed by the screen pressing transmission mechanism, and can transfer the screen pressed to the screen pressing feeding mechanism; the screen pressing distance variable mechanism includes: multiple screen pressing carriers, each of which can bear a screen pressed; a variable distance driving assembly, which can drive the multiple screen pressing carriers to move relative to each other to adjust the distance between two adjacent screen pressing carriers.

[0013] The present application also provides a string welding device, including the above-mentioned battery string preparation device, and also includes a welding device, which is arranged downstream of the stacking device and can weld the string welding unit to facilitate shaping of the battery cells and welding strips.

[0014] Furthermore, the welding device comprises: a welding box capable of welding the string welding units; and a welding conveying mechanism capable of receiving the stacked string welding units in the stacking device and inputting the string welding units into the welding box.

[0015] The present application provides a battery string preparation device, including a battery cell feeding device, a soldering tape feeding device and a stacking device; the battery cell feeding device supplies battery cells, and the soldering tape feeding device supplies soldering tapes, and the battery cells and soldering tapes are laid together to form a string welding unit; the stacking device can receive the string welding unit and stack the string welding unit, thereby conveniently preparing the battery string.

[0016] The present application also provides a string welding device, including the above-mentioned battery string preparation device, and also includes a welding device, which is arranged downstream of the stacking device and can weld the constructed string welding units, thereby conveniently realizing the shaping of the battery string. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 It is a schematic diagram of a construction method of a battery string in the prior art;

[0019] Figure 2 It is a schematic diagram of two stacked series welding units provided by the present application;

[0020] Figure 3 It is another schematic diagram of two stacked series welding units provided by the present application;

[0021] Figure 4 It is another schematic diagram of two stacked series welding units provided by the present application;

[0022] Figure 5yes Figure 4 Schematic diagram of the battery string structure consisting of a series of welded unit stacks;

[0023] Figure 6 yes Figure 5 A schematic diagram of the top view of the battery string;

[0024] Figure 7 There is also a schematic diagram of two stacked series welding units;

[0025] Figure 8 yes Figure 7 Schematic diagram of the battery string structure consisting of a series of welded unit stacks;

[0026] Fig. 9 It is a structural schematic diagram of a string welding unit including a pressing screen;

[0027] Fig.10 yes Fig. 9 A schematic diagram of the top view of the middle series welding unit;

[0028] Fig.11 It is a structural schematic diagram of a battery string preparation device provided in the present application;

[0029] Fig.12 yes Fig.11 A schematic diagram of the side structure of the battery cell handling mechanism;

[0030] Fig.13 It is a structural schematic diagram of a welding strip feeding device provided by the present application;

[0031] Fig.14 It is a structural schematic diagram of a welding strip cutting mechanism, a welding strip pulling mechanism and a welding strip guiding mechanism provided by the present application;

[0032] Fig.15 yes Fig.14 A schematic diagram of the side structure of the middle welding strip cutting mechanism;

[0033] Fig.16 yes Fig.15 A schematic diagram of a top view of the structure of the first cutting die and the second cutting die in one state;

[0034] Fig.17 yes Fig.15 A schematic diagram of a top view of the structure of the first cutting die and the second cutting die in another state;

[0035] Fig.18 yes Fig.11 A schematic diagram of the structure of the middle lamination device;

[0036] Fig.19 yes Fig.18 The side view structural diagram of the middle lamination device omitting the lamination conveying mechanism and the base;

[0037] Fig. 20 yes Fig.18 A schematic diagram of the structure of the middle lamination platform viewed from the side in another direction;

[0038] Fig.21 yes Fig.18 Schematic diagram of the structure of the middle base;

[0039] Fig. 22 It is a structural schematic diagram of a string welding device provided by the present application;

[0040] Fig.23 It is a structural schematic diagram of a lamination device, a screen pressing circulation device and a welding device provided by the present application;

[0041] Fig.24 yes Fig.23 Side view of the structure of the medium voltage network support platform;

[0042] Fig.25 This is a schematic diagram of the matching structure of a variable pitch drive assembly and a screen pressing platform provided by the present application;

[0043] Fig.26 It is a schematic diagram of the matching structure of another variable pitch drive assembly and a screen pressing bearing platform provided by the present application;

[0044] Fig. 27 This is a schematic diagram of the matching structure of another variable pitch drive assembly and a screen pressing platform provided by the present application;

[0045] Fig.28 yes Fig. 27 Schematic diagram of the structure with the medium voltage network support platform pulled open. DETAILED DESCRIPTION

[0046] It should be explained that, for ease of understanding of the drawings, the drawings show XYZ direction axes, wherein the X direction is the straight line direction in the illustrated embodiment, the Y direction is the direction perpendicular to the straight line direction in the horizontal plane, and the Z direction is the vertical direction.

[0047] It is also necessary to explain that in order to better display the contents of the drawings, some of the drawings are flipped 90° to the left for easier reading; however, when the text describes the directions such as "left", "right", "up" and "down" corresponding to the drawings, the direction of the numbers in the drawings shall prevail; that is, when the numbers in the drawings are set to the left, the direction shall be based on the situation when the drawing is flipped 90° to the right.

[0048] First, the string welding unit 10 needs to be explained. The string welding unit 10 is formed by laying out the battery cell 1 and the welding ribbon 2. In any string welding unit 10, the first end 2a of the welding ribbon 2 is on the battery cell 1, and the second end 2b protrudes from the battery cell 1.

[0049] It can be seen that the welding ribbon 2 is a long ribbon structure, and along the length direction of the welding ribbon 2, it has two opposite ends, namely the first end 2a and the second end 2b. For the welding ribbon 2, the structure and function (connecting the battery cell 1) of the first end 2a and the second end 2b are the same. The reason why they are distinguished as "the first end 2a" and "the second end 2b" is only for the convenience of description and understanding. For this reason, it can be understood that in the string welding unit 10, one end of the welding ribbon 2 is connected to the battery cell 1, and the other end protrudes outside the battery cell 1.

[0050] A series welding unit 10 usually includes only one battery cell 1. However, according to the specifications of the battery cell 1 and the process requirements, multiple welding ribbons 2 (for example, six, nine, etc.) may be laid on one battery cell 1. These welding ribbons 2 correspond to the grid lines on the surface of the battery cell 1, and can not only connect two adjacent battery cells 1, but also play a role in current diversion.

[0051] For details, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 7 , five types of serial welding units 10 are shown in the figure. It can be seen that the serial welding unit 10 provided in the present application does not limit the specific connection method between the battery cell 1 and the welding ribbon 2. For example, the battery cell 1 has a front side and a back side, and the first end 2a of the welding ribbon can be laid on the front side of the battery cell 1 or on the back side of the battery cell 1; when multiple welding ribbons 2 are laid on a battery cell 1, part of the welding ribbon 2 can also be laid on the front side of the battery cell 1, and part of the welding ribbon 2 can also be laid on the back side of the battery cell 1.

[0052] Depending on the process, in other embodiments, a string welding unit 10 may include only one battery cell 1 and one welding ribbon 2; or, a string welding unit 10 may include multiple battery cells 2 (multiple battery cells 2 may be connected by welding ribbons 2, or the cells may be directly connected); or, in a string welding unit 10, the orientations of multiple welding ribbons 2 may be different... This application does not make specific limitations.

[0053] Furthermore, a plurality of string welding units 10 are stacked, so that the battery cell 1 of one string welding unit 10 is stacked on the second end 2 b of the welding strip of another string welding unit 10 .

[0054] In simple terms, stacking means stacking a plurality of string welding units 10 together. A sufficient number of string welding units 10 stacked together can form a battery string 20; an insufficient number of string welding units 10 stacked together form a stacking assembly; the stacking assembly continues to stack, and when the number of string welding units 10 is sufficient, a battery string 20 is finally formed.

[0055] Generally, in a stacked assembly or a battery string 20, in any three consecutive string welding units 10, the battery cell 1 of the middle string welding unit 10 is connected to the second end 2b of the welding strip of one string welding unit 10; at the same time, the second end 2b of the welding strip of the middle string welding unit 10 is connected to the battery cell 1 of another string welding unit 10.

[0056] In special cases, for example, in any stacking assembly or battery string 20, the first string welding unit 10, its battery cell 1 is not connected to the second end 2b of the welding ribbon of other string welding units 10; for another example, in any stacking assembly or battery string 20, the last string welding unit 10, its second end 2b of the welding ribbon is not connected to the battery cell 1 of other string welding units 10.

[0057] After lamination, the welding ribbon 2 can connect two adjacent battery cells 1 , wherein the first end 2 a of the welding ribbon is connected to the battery cell 1 of the string welding unit 10 in which it is located, and the second end 2 b is connected to the battery cell 1 of another string welding unit 10 .

[0058] Reference Figure 5 and Figure 8 , Figure 5 The battery string 20 shown consists of Figure 4 The string welding units 10 shown are stacked; wherein the first end 2a of the welding strip of any string welding unit 10 is on the upper surface of the battery cell 1, and the second end 2b of the welding strip protrudes from the battery cell 1 and can be connected to the lower surface of the battery cell 1 of another string welding unit 10. In addition, Figure 5 In the battery string 20 shown, the first welding unit 10, that is, the rightmost welding unit 10 in the figure, needs to connect the head end welding strip 2A to the lower surface of its battery cell 1; and the last welding unit 10 of the battery string 20, that is, the leftmost welding unit 10 in the figure, has a welding strip 2 constituting an end welding strip 2B; the head end welding strip 2A and the end welding strip 2B are longer than the ordinary welding strip 2 connecting two adjacent welding units 10 in the battery string 20, and can be connected to the bus bar (not shown) to facilitate the busbar of the battery string 20.

[0059] Figure 8 The battery string 20 shown consists of Figure 7 The string welding units 10 shown are stacked; wherein the first end 2a of the welding strip of any string welding unit 10 is located on the lower surface of the battery cell 1, and the second end 2b of the welding strip protrudes from the battery cell 1 and can be connected to the upper surface of the battery cell 1 of another string welding unit 10. Similarly, Figure 8 In the battery string 20 shown, the first welding unit 10, that is, the leftmost welding unit 10 in the figure, needs to connect the head end welding strip 2A to the upper surface of the battery cell 1; and the last welding unit 10 of the battery string 20, that is, the rightmost welding unit 10 in the figure, has the welding strip 2 constituting the end welding strip 2B.

[0060] It is easy to understand that when the battery string 20 has a head end welding ribbon 2A, the head end welding ribbon 2A can be divided into a part of the first string welding unit 10, that is, Figure 5 or Figure 8 The battery string 10 shown, its first welding unit 10 includes a battery cell 1, a group of head end welding ribbons 2A and a group of common welding ribbons 2, its last welding unit 10 includes a battery cell 1 and a group of head end welding ribbons 2A, and other welding units 10 include a battery 1 and a group of common welding ribbons 2. Among them, whether it is the head end welding ribbon 2A, the end welding ribbon 2B or the common welding ribbon 2, they are all welding ribbons, but the length specifications are different.

[0061] The present application provides a battery string preparation device, referring to Fig.11 , which includes: a battery cell loading device 100, used to supply battery cells 1; a solder strip loading device 200, used to supply solder strips 2; a stacking device 300, arranged downstream of the battery cell loading device 100 and the solder strip loading device 200, capable of receiving the battery cell 1 supplied by the battery cell loading device 100 and the solder strip 2 supplied by the solder strip loading device 200.

[0062] The lamination device 300 includes a lamination table 310 for receiving the battery cells 1 and the welding ribbons 2 to form a series welding unit 10 .

[0063] Specifically, during loading, the battery cell output by the battery cell loading device 100 and the soldering tape 2 output by the soldering tape loading device 200 are laid together, the first end 2a of the soldering tape is on the battery cell 1, and the second end 2b protrudes from the battery cell 1, forming a series welding unit 10. The stacking table 310 can be used to receive the constructed string welding unit 10, or the string welding unit 10 can be completed on the stacking table 310, for example: the battery cell loading device 100 first conveys the battery cell 1 to the stacking table 310, and then the solder tape loading device 200 spreads the solder tape 2 on the battery cell 1, so that the first end 2a of the solder tape is placed on the upper surface of the battery cell 1, and the second end 2b protrudes from the battery cell 1; or, when loading, the solder tape loading device 200 first spreads the solder tape 2 on the stacking table 310, and then the battery cell loading device 100 covers the battery cell 1 above the first end 2a of the solder tape, so that the lower surface of the battery cell 1 contacts the first end 2a of the solder tape, and the second end 2b of the solder tape protrudes from the battery cell 1.

[0064] Three usages of the lamination device 300 are described below:

[0065] Example 1.

[0066] The lamination table 310 is only used to construct or receive the string welding unit 10 .

[0067] The stacking device 300 further includes a stacking driving mechanism, which can move the string welding units 10 on the stacking platform 310 and then stack the string welding units 10 .

[0068] In this embodiment, the stacking drive mechanism includes a stacking conveying assembly (not shown) and a stacking transfer platform (not shown). At this time, the stacking conveying assembly can convey the string welding unit 10 from the stacking platform 310 and transfer the string welding unit 10 to the stacking transfer platform; the stacking transfer platform is used for the string welding unit 10 to stack.

[0069] Starting from the stacking conveying assembly conveying the second welding unit 10, the welding unit 10 conveyed later can be stacked on the welding unit 10 that has been placed in place, so that the battery cell 1 of the later welding unit 10 is stacked on the second end 2b of the welding strip of the previous welding unit 10; a preset number of welding units 10 are completed to form a battery string 20 on the stacking transfer platform.

[0070] Among them, the stacking transfer platform can be a platform with a certain length, which is only used to receive the string welding unit 10 and provide the space required for the stacking of the string welding unit 10. Alternatively, the stacking transfer platform can adopt a conveyor belt assembly; the string welding unit 10 is placed on the upper surface of the conveyor belt, and when a string welding unit 10 is in place, the conveyor belt moves forward by one station, so that the second end 2b of the welding belt of the string welding unit 10 is in the stacking station; when the next string welding unit 10 is transported to the stacking station, its battery cell 1 can be directly pressed on the second end 2b of the welding belt... In this way, the stacking transfer platform can not only receive the string welding unit 10, but also transport the string welding unit 10 downstream; further, through the intermittent action of the conveyor belt, the stacking station can also be limited, so that the stacking handling assembly can deliver the string welding unit 10 to the same position each time, and then stack quickly and accurately.

[0071] In summary, the stacking station refers to the working station where the welding unit 10 realizes stacking. The stacking station can be a fixed position. When any of the welding units 10 performs stacking, the position will realize the contact between the battery cell 1 and the second end 2b of the welding strip. Alternatively, the stacking station can be a variable position. For example, when one welding unit 10 is in place, the next welding unit 10 is stacked on the second end 2b of its welding strip... In this way, the stacking station moves backward. In addition, the stacking station can also be a position with a certain range. For example, multiple welding units 10 are stacked at the same time. At this time, the positions where multiple welding units 10 overlap belong to the stacking station.

[0072] Furthermore, in this embodiment, the stacking device 300 may include a plurality of stacking platforms 310 to simultaneously construct or receive a plurality of string welding units 10. At this time, the stacking transport assembly can transport the string welding units 10 from each stacking platform 310 one by one, or can simultaneously transport all the string welding units 10; finally, the stacking transport assembly transports each string welding unit 10 to the stacking transfer platform to achieve stacking.

[0073] Among them, the stack handling assembly can adopt handling components such as robots and overhead cranes.

[0074] Example 2.

[0075] The lamination table 310 is not only used to construct or receive the string welding unit 10, but also serves as a lamination station.

[0076] At this time, the lamination device 300 includes a plurality of lamination stages 310, which are arranged in a straight line and can each receive a string welding unit 10. The lamination device 300 also includes a lamination driving mechanism; the lamination driving mechanism includes: a lamination lifting mechanism 320, which is connected to the lamination stage 310 and can drive the lamination stage 310 to move in a vertical direction; and a lamination translation mechanism 330, which is connected to the lamination stage 310 and can drive the lamination stage 310 to move in a straight line direction.

[0077] In this embodiment, the straight line direction is the arrangement direction of the plurality of lamination stages 310 .

[0078] Reference Fig.11 , Fig.18 and Fig.19 By setting a plurality of stacking stages 310, the stacking device 300 can simultaneously receive a plurality of string welding units 10. On any two adjacent stacking stages 310, the battery cell 1 of one string welding unit 10 is directly opposite to the second end 2b of the welding strip of another string welding unit 10; thus, the stacking lifting mechanism 320 can make the two adjacent stacking stages 310 at different heights; thus, the stacking translation mechanism 330 can drive the stacking stages 310 to approach each other in a straight line direction, thereby avoiding collision between the approaching string welding units 10; when the battery cell 1 of an adjacent string welding unit 10 overlaps with the horizontal projection of the second end 2b of the welding strip of another string welding unit 10, the stacking lifting mechanism 320 can drive the stacking stages 310 to approach each other in a vertical direction, so that the battery cell 1 contacts the second end 2b of the welding strip, thereby achieving stacking.

[0079] It should be noted that the stacking lifting mechanism 320 and the stacking translation mechanism 330 can be operated one by one, that is, when the stacking lifting mechanism 320 drives the stacking table 310 to move in the vertical direction, the stacking translation mechanism 330 drives the stacking table 310 to move in the linear direction; when the battery cell 1 of an adjacent string welding unit 10 overlaps with the horizontal projection of the second end 2b of the welding strip of another string welding unit 10, the stacking lifting mechanism 320 drives the stacking table 310 to move in the reverse vertical direction, so that the string welding units 10 are overlapped.

[0080] Alternatively, the stacking lifting mechanism 320 and the stacking translation mechanism 330 may act synchronously, that is, when the stacking lifting mechanism 320 drives the stacking platform 310 to move away from and / or approach each other in the vertical direction, the stacking translation mechanism 330 drives the stacking platform 310 to approach each other in a straight line direction; as long as the heights of the two adjacent welding units 10 are different before they approach and touch each other in a straight line direction; and / or the heights of the two adjacent welding units 10 are different before their horizontal projections overlap.

[0081] In addition, when the stacking stages 310 approach each other in a straight line direction, the multiple stacking stages 310 can move toward the same stacking stage 310 or the same position (for example, the multiple stacking stages 310 are arranged in the left-right direction, and when stacking, the stacking stages 310 move toward the middle position and approach each other; at this time, the stacking stage 310 on the left side of the middle position moves to the right, and the stacking stage 310 on the right side of the middle position moves to the left), so as to achieve stacking of all the string welding units 10 at one time. Alternatively, the multiple stacking stages 310 can be divided into multiple groups, and the stacking stages 310 in one group approach each other to achieve a primary approach; then, the multiple groups of stacking stages 310 approach each other again to achieve a secondary approach... and finally achieve stacking of all the string welding units 10.

[0082] When the stacking stages 310 are moving away from each other in the vertical direction, the multiple stacking stages 310 can all move upward or downward, and as long as the amplitudes of the movements are different, the heights of adjacent stacking stages 310 can be different. Alternatively, among the multiple stacking stages 310, some stacking stages 310 move upward, while some stacking stages 310 move downward, and the heights of adjacent stacking stages 310 can also be different.

[0083] Similarly, when the stacking tables 310 are close to each other in the vertical direction, they can move upward or downward synchronously to varying degrees, or they can move partially upward and partially downward, both of which can achieve the stacking of the string welding units 10.

[0084] For example, building Figure 5 When the battery string 20 is shown, the lamination device 300 includes four lamination stages 310 as an example for description; Fig.18 and Fig.19, four stacking tables 310 are arranged at intervals along the left and right directions, and each of them receives a string welding unit 10; on any stacking table 310, the battery cell 1 is on the right, the first end 2a of the welding strip is connected to the upper surface of the battery cell 1, and the second end 2b protrudes on the left side of the battery cell 1; in this way, on any two adjacent stacking tables 310, the battery cell 1 on one stacking table 310 is directly opposite to the second end 2b of the welding strip on the other stacking table 310. When the string welding unit 10 is in place, the stacking lifting mechanism 320 drives the stacking table 310 to move upward in the vertical direction, so that the height of the four stacking tables 310 decreases from left to right; in this way, on any two adjacent stacking tables 310, the battery cell 1 on one stacking table 310 is higher than the second end 2b of the welding strip on the other stacking table 310. The stacking translation mechanism 330 drives the stacking platform 310 to move to the right, so that the four stacking platforms 310 are close to each other, until any two adjacent stacking platforms 310, the battery cell 1 on one stacking platform 310 partially overlaps the horizontal projection of the second end 2b of the welding strip on another stacking platform 310. The stacking lifting mechanism 320 drives the stacking platform 310 to move downward in the vertical direction, so that the battery cell 1 contacts the second end 2b of the welding strip. Thus, the four string welding units 10 are stacked together to form a stacking assembly. Multiple stacking assemblies are constructed by the stacking device 300, and the battery cell 1 in one stacking assembly that does not contact the second end 2b of the welding strip is stacked on the second end 2b of the welding strip that does not contact the battery cell 1 in another stacking assembly... In this way, a sufficient number of string welding units 10 are stacked to finally form a battery string 20.

[0085] The stack lifting mechanism 320 may adopt driving components such as a cylinder, an electric cylinder or a linear module arranged in the vertical direction; the stack translation mechanism 330 may adopt driving components such as a cylinder, an electric cylinder or a linear module arranged in the first direction.

[0086] Further, any stacking platform 310 can move in the vertical direction under the drive of the stacking lifting mechanism 320; or, one of the stacking platforms 310 is relatively fixed in the vertical direction.

[0087] Further, any stacking platform 310 can move in a straight line direction under the drive of the stacking translation mechanism 330; or, one of the stacking platforms 310 is relatively fixedly arranged in a straight line direction;

[0088] In summary, since the movement amplitude of each stacking platform 310 may be different, when any stacking platform 310 can move in the vertical direction and / or the linear direction, the stacking device 300 may include multiple stacking lifting mechanisms 320 and / or multiple stacking translation mechanisms 330; wherein the stacking lifting mechanisms 320 or the stacking translation mechanisms 330 correspond one-to-one to the stacking platforms 310, and the stacking platforms 310 can be driven by the corresponding stacking lifting mechanisms 320 or the stacking translation mechanisms 330 to independently move in the vertical direction or the linear direction to meet the needs of stacking.

[0089] Alternatively, one of the plurality of lamination stages 310 is used as a reference member and does not move in the vertical direction and / or the linear direction. Fig.19 Taking the orientation shown as an example, when one stacking platform 310 does not move up and down in the vertical direction, in order to realize that the four stacking platforms 310 decrease in height from left to right, the stacking platform 310 on the left side of the reference stacking platform 310 can be moved upward, while the stacking platform 310 on the right side can be moved downward; similarly, in order to realize that the four stacking platforms 310 are close to each other in a straight line direction, the stacking platform 310 on the left side of the reference stacking platform 310 moves to the right, while the stacking platform 310 on the right side moves to the left. It can be seen that when one stacking platform 310 does not move in the vertical direction and / or in the straight line direction, the stacking needs can also be met.

[0090] When the reference stacking platform 310 exists, since the reference stacking platform 310 does not move in the vertical direction and / or the linear direction, the stacking lifting mechanism 320 or the stacking translation mechanism 330 may not be provided corresponding to the reference stacking platform 310 .

[0091] In addition, when a stacking platform 310 is connected to the stacking lifting mechanism 320 and the stacking translation mechanism 330 at the same time, the stacking platform 310 can be set at the output end of the stacking lifting mechanism 320, and the main body of the stacking lifting mechanism 320 is set at the output end of the stacking translation mechanism 330; or, the stacking platform 310 can be set at the output end of the stacking translation mechanism 330, and the main body of the stacking translation mechanism 330 is set at the output end of the stacking lifting mechanism 320.

[0092] Example 3.

[0093] The lamination table 310 is not only used to construct or receive the string welding unit 10, but also serves as a lamination station.

[0094] At this time, the lamination device 300 includes a plurality of lamination stages 310, which are arranged along a straight line and can each receive a string welding unit 10. The lamination device 300 also includes a lamination driving mechanism; the lamination driving mechanism is used to drive the plurality of lamination stages 310 to move along a straight line direction. In this embodiment, the straight line direction is the arrangement direction of the plurality of lamination stages 310.

[0095] Since the grid lines on the surface of the battery cell 1 are sunken to form grooves, and the welding strip 2 will be stuck in the grooves, in this embodiment, the stacking tables 310 are brought closer to each other in a straight line direction so that the second end 2b of the welding strip of one of the string welding units 10 of two adjacent stacking tables 310 gradually extends into the grid lines of the battery cell 1 of the other string welding unit, thereby achieving stacking.

[0096] It should be added that in Embodiment 2 and Embodiment 3, in order to avoid collision between the stacking platforms 310 when approaching each other, when the battery cell 1 needs to be stacked above the second end 2b of the welding strip, the battery cell 1 of the string welding unit 10 can be partially protruded from the stacking platform 310. It is easy to understand that the protruding part of the battery cell 1 is used to connect the second end 2b of the welding strip of another string welding unit 10; in this way, when the horizontal projections of the battery cell 1 and the second end 2b of the welding strip overlap in place, there is no overlapping part in the horizontal projections of the two stacking platforms 310; continue to make the two stacking platforms 310 approach each other in the vertical direction, the battery cell 1 of one string welding unit 10 is stacked on the second end 2b of the welding strip of another string welding unit 10, and the two stacking platforms 310 will not collide. Further, in order to ensure the stacking effect, the stacking platform 310 can completely support the second end 2b of the welding strip; in this way, when stacking, the second end 2b of the welding strip will not fall, thereby ensuring that the battery cell 1 accurately presses the welding strip 2.

[0097] Alternatively, when the second end 2b of the welding strip needs to be stacked on the upper surface of the battery cell 1, the second end 2b of the welding strip of the string welding unit 10 can be made to partially protrude from the stacking table 310; and the stacking table 310 can completely support the battery cell 1; in this way, when the battery cell 1 contacts the second end 2b of the welding strip, the two stacking tables 310 will not collide.

[0098] In summary, the battery cell loading device 100 supplies the battery cell 1 and the solder strip loading device 200 supplies the solder strip 2, so as to complete the construction of the soldering unit 10; further, through the stacking table 310 and the stacking drive mechanism, the stacking of the soldering unit 10 can be achieved to form a battery string 20.

[0099] The battery cell loading device 100 is used to provide battery cells 1 to form a string welding unit 10 .

[0100] Two usages of the battery cell loading device 100 are introduced below:

[0101] Example 4.

[0102] The battery cell loading device 100 can carry the battery cells 1 one by one to the stacking device 300 .

[0103] The cell loading device 100 includes a cell conveying mechanism 110 and a cell handling mechanism 120; the cell conveying mechanism 110 may adopt a conveying mechanism such as a conveyor belt, a transmission roller, a handling platform, and an overhead crane; the cell conveying mechanism 110 can deliver the cell 1 to the cell handling mechanism 120. The cell handling mechanism 120 includes a cell extracting member 121 and a cell handling driving member 122; the cell extracting member 121 may adopt an extracting member such as a suction cup and a clamping claw to extract the cell 1; the cell handling driving member 122 may adopt a driving member such as a linear module and a robot, connected to the cell extracting member 121, and capable of driving the cell extracting member 121 to extract, transfer, and lower the cell 1.

[0104] Example 5.

[0105] The stacking device 300 includes a plurality of stacking stages 310 , which are arranged in a straight line and can each receive a string welding unit 10 ; the battery cell loading device 100 can simultaneously carry a plurality of battery cells 1 to each stacking stage 310 .

[0106] At this time, refer to Fig.11 and Fig.12 The cell transport mechanism 120 may include a plurality of cell extractors 121 , which are arranged in a straight line and at intervals at the movable end of the cell transport drive 122 ; the cell extractors 121 may correspond to the stacking tables 310 one by one.

[0107] The cell conveying mechanism 110 can continuously convey the cell 1 to the extraction station corresponding to the cell transporting mechanism 120. The cell transporting driving member 122 can drive the cell extracting member 121 to extract the cell 1 one by one until all the cell extracting members 121 obtain the cell 1; or, when a plurality of cells 1 are arranged in a straight line on the cell conveying mechanism 110, the cell transporting driving member 122 can drive the cell extracting member 121 to extract all the cells 1 at the same time. Subsequently, the cell transporting driving member 122 can drive the cell extracting member 121 to face the stacking table 310, so that the cell extracting member 121 releases the cell 1 on the stacking table 310.

[0108] Furthermore, the battery cell loading device 100 also includes a detection member 123, the working end of the detection member 123 is facing the battery cell conveying mechanism 110, and can detect the state of the battery cell 1 on the battery cell conveying mechanism 110, so that the battery cell transporting driving member 122 drives the battery cell extraction member 121 to accurately extract and transfer the battery cell 1.

[0109] For the detection member 123, one of its functions is to obtain the position of the battery cell 1; for example, the detection member 123 can adopt a photoelectric sensor. When the battery cell 1 passes through the detection member 123, it can block the signal of the photoelectric sensor. Therefore, the control system can know that the battery cell 1 has reached the position of the detection member 123; further, the control system can control the battery cell conveying mechanism 110 to stop the work station and make the battery cell 1 stay at the current work station; further, the control system can control the battery cell transporting drive member 122 to drive the battery cell extraction member 121 to extract the battery cell 1.

[0110] In addition, the position states of the battery cells 1 conveyed by the battery cell conveying mechanism 110 are not uniform. However, for the battery string 20, the position states of the multiple battery cells 1 constituting the battery string 20 are completely uniform; in simple terms, the grid lines of each battery cell 1 correspond to each other, and the extension directions of the corresponding grid lines are collinear; for details, please refer to Figure 6 , Figure 6 for Figure 5 The top view of the battery string 20 is shown, in which each battery cell is horizontally upright (ie, each side of the battery cell 1 is parallel or perpendicular to the left and right direction), and the grid lines (ie, the positions of the connecting welding strips 2) correspond to each other and extend along the left and right direction.

[0111] Therefore, when the battery cells 1 are loaded, the position state of the battery cells 1 needs to be corrected so that the position state of the loaded battery cells 1 is uniform and easy to stack.

[0112] The following introduces two methods of correcting the position status of the battery cell 1:

[0113] Example 6.

[0114] The cell transport driving component 122 may be a robot, and the detection component 123 may be a CCD (Charge-coupled Device) camera.

[0115] The CCD camera can capture the position state of the battery cell 1 delivered by the battery cell conveying mechanism 110, and transmit the information to the control system, which calculates the deviation correction amount and controls the robot to adjust the direction of the battery cell extracting member 121 before the battery cell extracting member 121 receives the battery cell 1, so that the battery cell 1 extracted by the battery cell extracting member 121 is in the required state. In this way, the battery cells 1 finally placed on the stacking table 310 can have a uniform state.

[0116] It should be explained that the position status information of the battery cell 1 includes the position information of the battery cell 1, that is, the position of the battery cell 1 in the battery cell conveying mechanism 110, and the status information of the battery cell 1, that is, the deviation of the battery cell 1 from the "horizontal upright" state.

[0117] Example 7.

[0118] The cell transport mechanism 120 includes a plurality of cell extracting components 121 . The cell transport driving component 122 may be a robot. Meanwhile, the detection component 123 may be a CCD (Charge-coupled Device) camera.

[0119] In one embodiment, the CCD camera captures and obtains the position status information of the first battery cell 1, and based on the information, the robot controls a battery cell extraction component 121 to approach the battery cell conveying mechanism 110 and extract the battery cell 1; the CCD camera captures and obtains the position status information of the second battery cell 1, and based on the information, the robot controls the battery cell extraction component 121 to rotate in a horizontal plane until the state of the first battery cell 1 that has been extracted is consistent with the state of the second battery cell 1, and then the robot controls another battery cell extraction component 121 to approach the battery cell conveying mechanism 110 and extract the second battery cell 1; the CCD camera captures and obtains the position status information of the third battery cell 1, and based on the information, the robot controls the battery cell extraction component 121 to rotate in a horizontal plane until the state of the first battery cell 1 that has been extracted and the state of the second battery cell 1 are consistent with the state of the third battery cell 1, and then the robot controls another battery cell extraction component 121 to approach the battery cell conveying mechanism 110 and extract the third battery cell 1… In this way, multiple battery cell extraction components 121 adjust their position status one by one and then extract the components; finally, the states of the battery cells 1 extracted by multiple battery cell extraction components 121 are unified.

[0120] It should be added that, in this embodiment, after multiple battery cell extraction members 121 have extracted battery cells 1, the position status of each battery cell 1 on the battery cell extraction member 121 is consistent with the situation of the last battery cell 1, but in this case, the battery cell 1 may not be "horizontally upright"; for this reason, before placing the battery cell 1 on the stacking table 310, it is necessary to use the robot to horizontally rotate the battery cell extraction member 121 again so that all the battery cells 1 are in the state required for stacking, and then release the battery cell 1.

[0121] Since multiple battery cell extraction members 121 can correspond one-to-one to multiple stacking tables 310, and all battery cells 1 have been adjusted to a uniform stacking state; therefore, the robot can control all battery cell extraction members 121 to move to the top of the corresponding stacking table 310, and release all battery cells 1 into place at one time.

[0122] In another embodiment, the battery cell conveying mechanism 110 first conveys multiple battery cells 1 to the corresponding work station of the battery cell handling mechanism 120; then, the position status information of all battery cells 1 is obtained through a CCD camera; then, the robot controls the battery cell extraction member 121 to approach the battery cell conveying mechanism 110 and receive multiple battery cells 1; the robot then controls the battery cell extraction member 121 to move above the stacking table 310; in the process of lowering the battery cell 1, the robot first controls the battery cell extraction member 121 to rotate horizontally according to the initial state of the first battery cell 1, until the first battery cell 1 is adjusted to the state required for stacking; releases the first battery cell 1 onto the stacking table 310; then, according to the initial state of the second battery cell 1, the robot controls the battery cell extraction member 121 to rotate horizontally until the second battery cell 1 is adjusted to the state required for stacking; then releases the second battery cell 1... In this way, the battery cells 1 are adjusted and released one by one; finally, the position states of the battery cells 1 on each stacking table 310 are unified and meet the stacking requirements.

[0123] In order to prevent the robot from driving the battery cell extraction components 121 to pick up or place the cells one by one, and causing multiple battery cell extraction components 121 to rise and fall synchronously and interfere with each other, the battery cell transport mechanism 120 also includes a battery cell lowering drive component 124, which corresponds one to one with the battery cell extraction components 121 and can independently drive the corresponding battery cell extraction components 121 to rise and fall.

[0124] Reference Fig.12 At this time, the cell transport drive 122 is mainly used to synchronously drive all the cell extractors 121 to transfer the cell 1, and the cell lowering drive 124 can drive the corresponding cell extractor 121 to descend to extract or release the cell 1, or to ascend to avoid the cell conveying mechanism 110 or the stacking device 300 as needed. By setting the cell lowering drive 124, only one preset cell extractor 121 can be allowed to descend and extract the cell 1 from the cell conveying mechanism 110, or only one preset cell extractor 121 can be allowed to descend and release the cell 1 to the corresponding stacking platform 310; thereby preventing other cell extractors 121 from contacting the cell conveying mechanism 110 or the stacking device 300.

[0125] The solder strip feeding device 200 is used to provide the solder strip 2 .

[0126] Two usages of the solder ribbon feeding device 200 are described below:

[0127] Example 8.

[0128] The solder ribbon loading device 200 transports the finished solder ribbon 2 to contact the battery cell 1 to construct the string soldering unit 10 .

[0129] In this embodiment, the finished soldering ribbon 2 is a soldering ribbon material segment that meets the process requirements and can be directly used to construct the string soldering unit 10 .

[0130] When multiple solder strips 2 need to be laid on a battery cell 1, the solder strip feeding device 200 can carry each solder strip 2 one by one to contact the battery cell 1. Alternatively, the solder strip feeding device 200 can carry multiple solder strips 2 to contact the battery cell 1 at the same time.

[0131] The solder strip feeding device 200 includes a solder strip extraction member (not shown) and a solder strip extraction drive member (not shown); the solder strip extraction member may be a suction cup, a clamp or other extraction member, and the solder strip extraction drive member may be a linear module, a robot or other driving member; after the solder strip extraction member extracts the finished solder strip 2, the solder strip extraction drive member drives the solder strip extraction member to move toward the construction station (e.g., the stacking station 310) of the string welding unit 10. When multiple solder strips 2 need to be laid on a battery cell 1, the solder strip feeding device 200 may include multiple solder strip extraction members, and the multiple solder strip extraction members are arranged at intervals along the arrangement direction of the grid lines of the battery cell 1; the multiple solder strip extraction members can extract a finished solder strip 2 respectively, and can pull the finished solder strip 2 to the construction station, one-to-one corresponding to the grid lines of the battery cell 1.

[0132] Example 9.

[0133] To facilitate the continuous operation of the equipment, the soldering ribbon feeding device 200 can prepare the finished soldering ribbon 2 and then transport the finished soldering ribbon 2 to the construction station of the string soldering unit 10 .

[0134] In one embodiment, the solder tape loading device 200 includes: a solder tape unwinding mechanism 210, for releasing the solder tape material; a solder tape cutting mechanism 220, which is arranged downstream of the solder tape unwinding mechanism 210 and can cut the solder tape material; a solder tape pulling mechanism 230, which can pull the solder tape material out from the solder tape unwinding mechanism 210 and pull the solder tape material through the solder tape cutting mechanism 220, so that the solder tape cutting mechanism 220 can cut the solder tape material.

[0135] Reference Fig.13 The solder strip unwinding mechanism 210 includes an unwinding shaft 211 and an unwinding driving member for driving the unwinding shaft 211 to rotate; the coil of solder strip material (hereinafter referred to as material strip) is sleeved on the unwinding shaft 211, and the unwinding driving member drives the unwinding shaft 211 to rotate, so as to release the material strip. After the solder strip pulling mechanism 230 grabs the free end of the material strip, it moves downstream and gradually pulls out the material strip; the pulled out material strip passes through the solder strip cutting mechanism 220; after pulling out a preset length, the solder strip cutting mechanism 220 cuts the material strip, and the cut solder strip material segment is the required finished solder strip 2.

[0136] The unwinding shaft 211 may be an air-expanding shaft; the unwinding drive may be a servo motor. The welding strip cutting mechanism 220 may be a cutter, which can move toward the strip and cut the strip under the drive of the cutter drive (using a drive member such as a cylinder or an electric cylinder). The welding strip traction mechanism 230 includes a traction member (using an extraction member such as a clamp or a suction cup), which can extract the free end of the strip and can move downstream and pull out the strip under the drive of the traction drive (using a drive member such as an electric cylinder or a linear module).

[0137] It should be supplemented that, when a plurality of solder ribbons 2 need to be laid on a battery cell 1, the solder ribbon unwinding mechanism 210 may include a plurality of unwinding shafts 211, each for releasing a solder ribbon 2 to meet usage requirements.

[0138] Furthermore, when the stacking mechanism 300 includes multiple stacking tables 300 and stacks multiple string welding units 10 at the same time, the solder tape loading device 200 needs to supply multiple groups of solder tapes 2 (multiple solder tapes 2 laid on a battery cell 1 are called "a group of solder tapes").

[0139] The following introduces two methods of simultaneously preparing multiple groups of solder strips 2 using the solder strip feeding device 200:

[0140] Example 10.

[0141] The battery string preparation device is provided with a plurality of groups of solder strip feeding devices 200 described in Example 9, each of which is used to prepare a group of solder strips 2.

[0142] Alternatively, the battery string preparation device is provided with only one set of the solder strip feeding device 200 described in Example 9, and multiple sets of solder strips 2 are prepared one by one through the solder strip feeding device 200.

[0143] Example 11.

[0144] The battery string preparation device is only provided with one set of the solder strip feeding device 200 described in Example 9, and the solder strip feeding device 200 includes a set of solder strip unwinding mechanism 210, a set of solder strip pulling mechanism 230 and multiple sets of solder strip cutting mechanism 220; the multiple sets of solder strip cutting mechanism 220 are arranged in a straight line and at intervals downstream of the solder strip unwinding mechanism 210.

[0145] Reference Fig.13 The material strip released by the welding strip unwinding mechanism 210 is pulled by the welding strip pulling mechanism 230 and passes through each welding strip cutting mechanism 220 in sequence. It is easy to imagine that the distance between two adjacent sets of welding strip cutting mechanisms 220 is the length of the finished welding strip 2. After pulling out the material strip of a preset length, the welding strip cutting mechanism 220 can cut the pulled out long strip into multiple sections, thereby obtaining multiple sets of finished welding strips 2.

[0146] As expected, when the ribbon cutting mechanism 220 uses a cutter to cut the material strip, the blade of the cutter will inevitably contact the material strip; that is, the position of the ribbon cutting mechanism 220 is close to the tape running position of the material strip; this will affect the ribbon pulling mechanism 230 to pull out the material strip in a straight line direction. In this embodiment, the straight line direction is the arrangement direction of the multiple sets of ribbon cutting mechanisms 220.

[0147] To this end, the solder strip feeding device 200 also includes a solder strip lifting mechanism 260, which is connected to the solder strip cutting mechanism 220 and can drive the solder strip cutting mechanism 220 to move in the vertical direction; wherein, any solder strip cutting mechanism 220 can move in the vertical direction under the drive of the solder strip lifting mechanism 260; or, a group of solder strip cutting mechanisms 220 that the solder strip material strip passes through first are relatively fixed in the vertical direction.

[0148] By providing the ribbon lifting mechanism 260, before the ribbon pulling mechanism 230 pulls the material ribbon, the ribbon lifting mechanism 260 can drive the ribbon cutting mechanism 220 to descend or ascend to stay away from the pulling path of the ribbon pulling mechanism 230, thereby preventing the ribbon cutting mechanism 220 from interfering with the action of the ribbon pulling mechanism 230. After the ribbon pulling mechanism 230 pulls the ribbon material ribbon through the ribbon cutting mechanism 220, the ribbon lifting mechanism 260 drives the ribbon cutting mechanism 220 to approach the ribbon material ribbon, so as to facilitate the operation of the ribbon cutting mechanism 220.

[0149] The welding strip lifting mechanism 260 may adopt driving components such as electric cylinders and linear modules.

[0150] It should be explained that since the multiple groups of solder strip cutting mechanisms 220 are arranged in a straight line and at intervals, it is easy to think that the "group of solder strip cutting mechanisms 220 that the solder strip material strip passes first" is the first solder strip cutting mechanism 220 downstream of the solder strip unwinding mechanism 210. For example, referring to Fig.11 The material strip released by the solder strip unwinding mechanism 210 first passes through the leftmost solder strip cutting mechanism 220; after one strip cutting, the free end of the material strip will be at the leftmost solder strip cutting mechanism 220; the solder strip cutting mechanism 220 does not need to perform the lifting and lowering avoidance action, because the cut material strip and its free end are at the solder strip cutting mechanism 22; when preparing the next round of solder strip, the solder strip pulling mechanism 230 can extract the free end of the material strip at the solder strip cutting mechanism 220.

[0151] It is also necessary to explain that the welding strip feeding device 200 may include multiple groups of welding strip lifting mechanisms 260, and the welding strip lifting mechanisms 260 correspond to the welding strip cutting mechanisms 220 that need to be lifted one by one; in this case, each welding strip cutting mechanism 220 can be lifted independently. Alternatively, the welding strip feeding device 200 may include only one group of welding strip lifting mechanisms 260, and the group of welding strip lifting mechanisms 260 is simultaneously connected to all the welding strip cutting mechanisms 220 that need to be lifted; in this case, each welding strip cutting mechanism 220 can be lifted synchronously. Alternatively, the welding strip feeding device 200 may include multiple groups of welding strip lifting mechanisms 260, but among the multiple groups of welding strip cutting mechanisms 220, some are independently connected to one group of welding strip lifting mechanisms 260, and some are connected to the same group of welding strip lifting mechanisms 260... This application does not make specific limitations.

[0152] Furthermore, after a plurality of finished soldering ribbons 2 are prepared, the soldering ribbons 2 need to be transported to form a serial soldering unit 10 where they are laid together with the battery cells 1 .

[0153] The following describes in detail two ways of conveying the welding ribbon 2. For ease of understanding, in the following embodiments, the welding ribbon 2 is conveyed to the lamination table 310 described in Embodiment 2, and the battery cells 1 are laid together:

[0154] Example 12.

[0155] The solder strip feeding device 200 further includes a solder strip conveying mechanism (not shown). After the finished solder strip 2 is prepared, the solder strip conveying mechanism can convey the finished solder strip 2 to the lamination device 300 .

[0156] Among them, the solder strip conveying mechanism can include a solder strip extraction member (not shown) and a solder strip extraction driving member (not shown). For details, reference may be made to the structure described in Example 8, which will not be repeated here.

[0157] Example 13.

[0158] The pulling direction of the welding tape pulling mechanism 230 is made consistent with the arrangement direction of the multiple lamination stages 310 . In this way, the finished welding tape 2 is prepared, and the welding tape pulling mechanism 230 can extract the finished welding tape 2 and pull it onto the lamination stage 310 .

[0159] It is easy to imagine that in order to simplify the movement path of the welding tape pulling mechanism 230, the welding tape pulling mechanism 230 will not turn in the process of pulling the material tape or the welding tape 2. Therefore, in this embodiment, the pulling direction of the welding tape pulling mechanism 230 is the arrangement direction of the multiple welding tape cutting mechanisms 220, and it is also the arrangement direction of the multiple stacking stages 310, and the stacking stages 310 are arranged downstream of the welding tape cutting mechanism 220. At this time, the welding tape pulling mechanism 230 pulls out a preset length of the material tape along a straight line, and the material tape passes through the multiple welding tape cutting mechanisms 220 in sequence; the welding tape cutting mechanism 220 cuts the material tape to obtain multiple welding tape material segments; the welding tape pulling mechanism 230 extracts these material segments, continues to move in a straight line, and pulls the material segments into the stacking stage 310.

[0160] At this time, the traction direction of the welding tape traction mechanism 230 points to the lamination device 300 . In other words, the lamination device 300 is arranged on the movement path of the welding tape traction mechanism 230 .

[0161] In this embodiment, the straight line direction is the pulling direction of the welding ribbon pulling mechanism 230 , the arrangement direction of the plurality of lamination stages 310 , and the arrangement direction of the plurality of welding ribbon cutting mechanisms 220 .

[0162] In this embodiment, the welding strip traction mechanism 230 may include only one set of traction mechanisms. Fig.13 The traction mechanism has two action processes; the first action process is to pull out the material strip of the required length from the strip unwinding mechanism 210; the second action process is to pull the finished strip 2 into the lamination device 300. It should be noted that when preparing multiple sets of strips 2 at the same time, the strip traction mechanism 230 needs to continuously reciprocate to pull all the strips 2 onto the corresponding lamination platform 310.

[0163] In order to speed up the handling efficiency of the finished product welding strip 2, refer to Fig.14 The welding ribbon pulling mechanism 230 includes: a pre-pulling component 231, which is used to pull out the welding ribbon material from the welding ribbon unwinding mechanism 210; and a belt pulling component 232. After the welding ribbon cutting mechanism 220 cuts the material, the belt pulling component 232 can pull out the cut welding ribbon 2 from the welding ribbon cutting mechanism 220. The material released by the welding ribbon unwinding mechanism 210 is pulled through the welding ribbon cutting mechanism 220 via the pre-pulling component 231; after pulling out the material of the preset length, the pre-pulling component 231 can return to the welding ribbon unwinding mechanism 210 to prepare for the next pulling; and the welding ribbon 2 cut by the welding ribbon cutting mechanism 220 is pulled downstream via the belt pulling component 232.

[0164] It is easy to understand that through the independent actions of the pre-traction component 231 and the belt traction component 232, after the finished solder strip 2 is prepared, the belt traction component 2320 transports the finished solder strip 2, and the pre-traction component 231 can start the next round of material strip traction, thereby speeding up the preparation efficiency of the solder strip 2.

[0165] It should be noted that when preparing multiple groups of welding strips 2 at the same time, the welding strip pulling mechanism 230 may include multiple groups of belt pulling components 232, and the belt pulling components 232 correspond to the welding strip cutting mechanism 220 one by one. After the welding strip cutting mechanism 220 cuts the material strip, the belt pulling component 232 can pull out the cut welding strip 2 from the corresponding welding strip cutting mechanism 220. In this way, the finished welding strip 2 is prepared, and the multiple groups of belt pulling components 232 can carry all the welding strips 2 at the same time, thereby improving the feeding efficiency of the welding strip 2.

[0166] Among them, the pre-traction component 231 and / or the belt traction component 232 include: a traction member (using an extraction member such as a clamp or a suction cup) for extracting the free end of the material strip or the welding strip 2; a traction drive member (using a driving member such as an electric cylinder or a linear module) that connects the traction member and can drive the traction member to move in a straight line direction.

[0167] It should be added that when the welding ribbon pulling mechanism 230 includes multiple groups of belt pulling components 232, any belt pulling component 232 may include a pulling member and a pulling driving member, so that each belt pulling component 232 can independently move to the corresponding welding ribbon 2 and then pull the welding ribbon 2 to the desired position. Alternatively, multiple groups of belt pulling components 232 include only one pulling driving member, which can drive all the pulling members to move at the same time; in this case, multiple pulling members are arranged at intervals along a straight line direction, and can simultaneously approach to extract the corresponding welding ribbon 2 under the drive of the pulling driving member, and simultaneously introduce multiple welding ribbons 2 into the corresponding lamination table 310.

[0168] In addition, when multiple solder strips 2 are laid on one battery cell 1, any pre-traction assembly 231 or tape traction assembly 232 may include multiple traction members to facilitate extracting all the material strips or solder strips 2 at one time.

[0169] When multiple solder strips 2 are laid on a battery cell 1, the solder strip unwinding mechanism 210 may include multiple unwinding shafts 211 to release multiple strips at the same time. For the convenience of description, the arrangement direction of the multiple strips is defined as the second direction, and the second direction is perpendicular to the extension direction of the strip in the horizontal plane; when the solder strip pulling mechanism 230 pulls the strip along a straight line, the second direction is perpendicular to the pulling direction.

[0170] In order to cut multiple strips, multiple sets of strip cutting mechanisms 220 may be arranged along the second direction to correspondingly cut each strip. In order to simplify the structure of the strip cutting mechanism 220, two types of strip cutting mechanisms 220 are described in detail below:

[0171] Example 14.

[0172] The cutting knife of the welding strip cutting mechanism 220 is a long knife, and the length of the long knife is not shorter than the length of the multiple strips arranged in the second direction; thus, under the drive of the cutting knife driving member, the long knife can cut all the strips at one time.

[0173] Example 15.

[0174] The solder strip cutting mechanism 220 includes: a first cutting die 221, on which a plurality of blades arranged at intervals along a second direction are arranged; a second cutting die 222, on which a plurality of blades arranged at intervals along the second direction are arranged; a cutting drive assembly 223, which can drive the first cutting die 221 and the second cutting die 222 to move relative to each other along the second direction; wherein the blades on the first cutting die 221 correspond one to one with the blades on the second cutting die 222; the solder strip passes between the corresponding two blades; the first cutting die 221 and the second cutting die 222 move toward each other, and can cut a plurality of solder strips at the same time.

[0175] Specific reference Figures 15 to 17 , the first cutting die 221 and the second cutting die 222 extend along the second direction, and the gap between two adjacent blades on any cutting die constitutes a channel through which the material tape can pass. In the non-cutting state, there is also a channel through which the material tape can pass between the two corresponding blades on the two cutting dies. When the material tape passes through the welding tape cutting mechanism 220, it passes through the two channels at the same time. The direction of the blade tip on the first cutting die 221 is opposite to the direction of the blade tip on the second cutting die 222; when the two cutting dies move relative to each other, the corresponding two blade tips keep approaching each other and can cut the material tape in the channel.

[0176] By driving the blade to cut the material strip along the second direction, it is possible to avoid the blade from moving in the vertical direction and interfering with the action of the solder strip pulling mechanism 230 ; and it is also possible to reduce the space occupied by the solder strip cutting mechanism 220 .

[0177] The cutting drive assembly 223 may use two sets of driving components (driving components such as cylinders or electric cylinders) to drive the first cutting die 221 or the second cutting die 222 to move in the second direction respectively. Alternatively, one of the first cutting die 221 and the second cutting die 222 is fixedly arranged, and the other can move in the second direction under the drive of the cutting drive assembly 223. Alternatively, the cutting drive assembly 223 may use a motor and a double screw; the double screw includes two sections of threads with opposite rotation directions, and the first cutting die 221 and the second cutting die 222 are respectively movably connected to one section of the threads through a thread nut; the motor drives the double screw to rotate, which can drive the first cutting die 221 and the second cutting die 222 to move relative to each other along the screw.

[0178] Furthermore, in any of the string welding units 10, the first end 2a of the welding tape is placed on the battery cell 1, while the second end 2b protrudes from the battery cell 1; since the battery cell 1 has a certain thickness, if the welding tape 2 is naturally laid flat on the battery cell 1, its protruding part may be suspended in the air, thereby affecting the lamination of the two string welding units 10. To this end, the welding tape feeding device 200 provided in the present application also includes a welding tape bending mechanism 240, which is arranged downstream of the welding tape unwinding mechanism 210 and can bend the welding tape 2 so that the extension directions of the first end 2a and the second end 2b of the welding tape are no longer collinear.

[0179] The bent solder strip 2 can be referred to Figure 1 , Figure 4 or Figure 7 A step is formed between the first end 2a and the second end 2b of the welding strip 2, the higher end is connected to the upper surface of the battery cell 1, and the lower end is connected to the lower surface of another battery cell 1.

[0180] Among them, refer to Fig.13 The welding strip bending mechanism 240 includes: a first bending block 241 and a second bending block 242 which are arranged opposite to each other in the vertical direction, and the material strip passes between the first bending block 241 and the second bending block 242; a part of the first bending block 241 facing the second bending block 242 is convex, and a part of the second bending block 242 facing the first bending block 241 is concave; a bending drive component 243 can drive the first bending block 241 and the second bending block 242 to move relative to each other. When bending is required, the bending drive component 243 drives the first bending block 241 and the second bending block 242 to move toward each other, and the convex part of the first bending block 241 can sink into the concave part of the second bending block 242, thereby pressing and bending the material strip therein.

[0181] It should be explained that the ribbon bending mechanism 240 can be arranged upstream of the ribbon cutting mechanism 220, and the ribbon released by the ribbon unwinding mechanism 210 is first bent and then cut; or the ribbon bending mechanism 240 can be arranged downstream of the ribbon cutting mechanism 220, and the ribbon released by the ribbon unwinding mechanism 210 is first cut and then bent. As long as the bending is completed before the ribbon 2 and the battery cell 1 are laid.

[0182] It should be supplemented that, when multiple welding ribbons 2 are laid on a battery cell 1, multiple sets of welding ribbon bending mechanisms 240 can be set along the second direction corresponding to the number of welding ribbons 2 in a group, and one welding ribbon 2 can be bent respectively; or, only one set of welding ribbon bending mechanisms 240 can be set. In this case, the first bending block 241 and the second bending block 242 have a certain length along the second direction, and a group of welding ribbons 2 pass through the first bending block 241 and the second bending block 242 at the same time, and the first bending block 241 and the second bending block 242 simultaneously bend a group of welding ribbons 2.

[0183] When the solder strip feeding device 200 prepares multiple groups of solder strips 2 at the same time; in one embodiment, multiple groups of solder strip bending mechanisms 240 can be set, and the multiple groups of solder strip bending mechanisms 240 are arranged at intervals along a straight line; the solder strip traction mechanism 230 can traction the material strip through each solder strip bending mechanism 240 in sequence; the material strip passing through the solder strip bending mechanism 240 can be folded into multiple bends.

[0184] For example, refer to Fig.13 , multiple groups of welding tape bending mechanisms 240 are arranged downstream of the welding tape unwinding mechanism 210 and upstream of the welding tape cutting mechanism 220; the welding tape traction mechanism 230 pulls out the material tape from the welding tape unwinding mechanism 210, first passes through each welding tape bending mechanism 240 in sequence, and then passes through multiple groups of welding tape cutting mechanisms 220 in sequence; in this way, a long strip of material can be folded into multiple spaced bends; when a new round of welding tape 2 is prepared, the welding tape traction mechanism 230 extracts the free end of the material tape and pulls out the material tape in a straight line direction, and the part of the material tape with multiple bends in the previous round of preparation is pulled into the welding tape cutting mechanism 220, so that the welding tape cutting mechanism 220 can cut off multiple material segments with bends.

[0185] It is easy to understand that in order to simplify the movement path of the welding ribbon pulling mechanism 230, the welding ribbon pulling mechanism 230 will not turn in the process of pulling the material strip. Therefore, the multiple sets of welding ribbon bending mechanisms 240 and the multiple sets of welding ribbon cutting mechanisms 220 are arranged along the same straight line; at this time, the straight line direction is the pulling direction of the welding ribbon pulling mechanism 230, the arrangement direction of the multiple sets of welding ribbon bending mechanisms 240, and the arrangement direction of the multiple sets of welding ribbon cutting mechanisms 220.

[0186] Furthermore, the solder strip bending mechanism 240 will apply pressure to the material strip that can cause the material strip to deform; in order to prevent the solder strip bending mechanism 240 from pulling out the material strip that has not been actively released from the solder strip unwinding mechanism 210 when bending the material strip, causing the material strip to deform or move, the solder strip feeding device 200 also includes: a front pressing component 291, which is arranged downstream of the solder strip bending mechanism 240 and can press the solder strip material strip passing through the solder strip bending mechanism 240; a rear pressing component 292, which is arranged upstream of the solder strip bending mechanism 240 and can press the solder strip material strip entering the solder strip bending mechanism 240; the front pressing component 291 and the rear pressing component 292 can press the solder strip material strip protruding from the solder strip bending mechanism 240.

[0187] Specifically, before the material strip to be bent enters the solder strip bending mechanism 240, it will first pass through the front pressure component 291, and after passing through the solder strip bending mechanism 240, the material strip will also pass through the rear pressure component 292; after the material strip is pulled out to a preset length, before bending, the material strip is pressed by the front pressure component 291 and the rear pressure component 292, so that the material strip is in a controlled stable state, which can facilitate the solder strip bending mechanism 240 to act accurately on the material strip.

[0188] Among them, the front pressing component 291 and / or the rear pressing component 292 include a first pressing block 2911 and a second pressing block 2912 arranged opposite to each other in the vertical direction, and a pressing block driving component 2913 (using a cylinder or an electric cylinder to drive the component) capable of driving the first pressing block 2911 and the second pressing block 2912 to move relative to each other; the material strip passes through the two pressing blocks, and before bending, the pressing block driving component 2913 drives the first pressing block 2911 and the second pressing block 2912 to move toward each other and press the material strip; when a new round of welding strip 2 is prepared, the pressing block driving component 2913 will drive the first pressing block 2911 and the second pressing block 2912 to move away from each other and loosen the material strip, so that the belt traction mechanism 230 can traction the material strip to move downstream.

[0189] Furthermore, the solder strip bending mechanism 240 also includes a strip pressing moving component 293, which is connected to the front pressing component 291 and / or the rear pressing component 292, and can drive the front pressing component 291 and / or the rear pressing component 292 to move in a straight line direction; after the front pressing component 291 and the rear pressing component 292 press the material strips at both ends of the solder strip bending mechanism 240, the strip pressing moving component 293 can drive the front pressing component 291 to move downstream, and / or the strip pressing moving component 293 can drive the rear pressing component 292 to move upstream, and can tighten the solder strip material strip pressed by the front pressing component 291 and the rear pressing component 292, thereby further ensuring the stability of the material strip.

[0190] It should be explained that the belt pressing moving assembly 293 may be provided with only one set of driving assemblies (which may be driving components such as electric cylinders and linear modules) connected to the front pressing assembly 291 or the rear pressing assembly 292; or, the belt pressing moving assembly 293 may be provided with two sets of driving assemblies, respectively connected to the front pressing assembly 291 and the rear pressing assembly 292. It is easy to understand that as long as one of the front pressing assembly 291 and the rear pressing assembly 292 can move away from the other, the material belt can be tightened.

[0191] It should be supplemented that, when multiple welding strips 2 are laid on a battery cell 1, multiple groups of front pressing components 291 and / or rear pressing components 292 can be set along the second direction corresponding to the number of a group of welding strips 2 to ensure the tension of each welding strip 2; or, only one group of front pressing components 291 and / or rear pressing components 292 can be set. In this case, the pressing block of the front pressing component 291 or the rear pressing component 292 has a certain length along the second direction, and a group of welding strips 2 pass through the first pressing block 2911 and the second pressing block 2912 at the same time, and the first pressing block 2911 and the second pressing block 2912 can press a group of welding strips 2.

[0192] In addition, the solder strip pulling mechanism 230 will pull the material strip through the solder strip cutting mechanism 220, and the portion of the material strip passing through the solder strip cutting mechanism 220 will be cut off to become a finished solder strip 2; in order to avoid the instability of the position of this protruding material strip, the solder strip feeding device 200 also includes a solder strip guiding mechanism 250, which is arranged downstream of the solder strip cutting mechanism 220; the solder strip guiding mechanism 250 includes: a guide plate 251, the guide plate 251 is provided with a guide groove arranged along the extension direction of the material strip, and the solder strip passes through the guide groove.

[0193] It is easy to imagine that at this time, the "material strip extension direction" is the arrangement direction of the multiple welding strip cutting mechanisms 220. After the welding strip pulling mechanism 230 pulls out the material strip, the guide plate 251 can receive the material strip, thereby stably supporting the material strip and facilitating the welding strip cutting mechanism 220 to act on the material strip; at the same time, the material strip falls into the guide groove, which can limit the position and extension direction of the welding strip.

[0194] Reference Fig.13 and Fig.14 The solder strip guide mechanism 250 is arranged near the solder strip cutting mechanism 220. By stably supporting the material strip, it can ensure that the solder strip cutting mechanism 220 accurately cuts the material strip. In addition, the cut solder strip 2 is supported in the guide plate 251, which can facilitate subsequent traction. Furthermore, the guide plate 251 is provided with a plurality of guide grooves arranged at intervals, so as to independently receive each solder strip and avoid interference between multiple solder strips.

[0195] The solder strip guiding mechanism 250 further includes: a front clamp 252, disposed at the front end of the guide plate 251, capable of clamping the solder strip at the front end of the guide groove; and a rear clamp 253, disposed at the rear end of the guide plate 251, capable of clamping the solder strip at the rear end of the guide groove.

[0196] The front clamp 252 and the rear clamp 253 cooperate to clamp the two ends of the material strip in the guide groove, further ensuring that the position of the material strip is stable and easy to cut. After cutting, the material strip in the guide groove is cut off to become a finished welding strip 2; before the finished welding strip 2 is moved into the stacking device 300, the front clamp 252 can first loosen the front end of the welding strip 2 to facilitate the welding strip conveying mechanism (such as the belt pulling assembly 232 described above) to hold the welding strip 2. At this time, since the rear end of the welding strip 2 is still clamped by the rear clamp 253, the welding strip 2 will not be easily displaced; then, the rear clamp 253 loosens the welding strip 2, and the welding strip conveying mechanism can move the welding strip 2 away.

[0197] Among them, the front clamp 252 and the rear clamp 253 can be complete clamps to clamp the material strip in the guide groove; or, the front clamp 252 and the rear clamp 253 can only include a clamp block, which can move toward the groove wall of the guide groove under the drive of the clamp driving member (using a driving component such as a cylinder or an electric cylinder), thereby clamping the material strip on the guide groove.

[0198] When the solder strip feeding device 200 includes multiple sets of solder strip cutting mechanisms 220, the solder strip feeding device 200 also includes multiple sets of solder strip guiding mechanisms 250. The solder strip guiding mechanisms 250 correspond one to one with the solder strip cutting mechanisms 220. Any solder strip guiding mechanism 250 is arranged downstream of the corresponding solder strip cutting mechanism 220 so as to stabilize the position of the material strip before cutting and facilitate the solder strip conveying mechanism to convey the solder strip 2 after cutting.

[0199] Furthermore, when the solder strip feeding device 200 includes a plurality of solder strip guiding mechanisms 250, in order to prevent the solder strip guiding mechanisms 250 from interfering with the solder strip traction mechanism 230 in traction of the solder strip, the solder strip feeding device 200 also includes a guiding lifting mechanism 270, which is connected to the solder strip guiding mechanism 250 and can drive the solder strip guiding mechanism 250 to move in a vertical direction.

[0200] Reference Fig.13 By setting the guide lifting mechanism 270, when the welding tape traction mechanism 230 pulls the material tape, the welding tape guide mechanism 250 can be lowered, away from the movement path of the material tape, and avoid the welding tape traction mechanism 230; when the welding tape traction mechanism 230 pulls the material tape through the welding tape guide mechanism 250, the guide lifting mechanism 270 can drive the welding tape guide mechanism 250 to rise, so that the guide plate 251 is close to the material tape and enters the guide groove.

[0201] The guide lifting mechanism 270 may adopt driving components such as electric cylinders and linear modules.

[0202] In addition, the ribbon loading device 200 may include a plurality of guide lifting mechanisms 270 corresponding to the plurality of ribbon guiding mechanisms 250 one by one; in this case, each ribbon guiding mechanism 250 can be independently lifted or lowered. Alternatively, the ribbon loading device 200 may include only one set of guide lifting mechanisms 270, which are connected to all the ribbon guiding mechanisms 250 at the same time; in this case, the plurality of ribbon guiding mechanisms 250 can be lifted or lowered synchronously.

[0203] Furthermore, when preparing multiple welding strips 2, the finished welding strips 2 just cut are adjacent to each other; however, when constructing multiple string welding units 10, these string welding units 10 are spaced apart from each other for the convenience of subsequent lamination. For this reason, the adjacent multiple welding strips 2 need to be separated.

[0204] To this end, the solder strip feeding device 200 further includes a guide translation assembly 280, which is connected to the solder strip guiding mechanism 250 and can drive the solder strip guiding mechanism 250 to move along the extension direction of the material strip.

[0205] It should be explained that the “extension direction of the material strip” is also the arrangement direction of the multiple sets of welding strip cutting mechanisms 220 .

[0206] It is easy to understand that the cut solder strips 2 are clamped in the solder strip guide mechanism 250, and the solder strip guide mechanisms 250 can be "pull apart" through the guide translation assembly 280, so that the solder strips 2 thereon are moved to be spaced apart from each other. At this time, the solder strip transport mechanism (for example, a plurality of ribbon pulling assemblies 232 spaced apart along a straight line as described above) simultaneously extracts all the solder strips 2 and can move them to the corresponding lamination table 310.

[0207] The guide translation assembly 280 may be driven by an electric cylinder or a linear module.

[0208] Among them, refer to Fig.14 The welding strip feeding device 200 may include a plurality of guide translation assemblies 280, which are connected to the welding strip guide mechanisms 250 one by one, and any welding strip guide mechanism 250 can independently move to a desired position. Alternatively, the welding strip feeding device 200 may include only one guide translation assembly 280, which is similar to the variable pitch drive assembly 442, as described below.

[0209] Furthermore, when a welding ribbon guide mechanism 250 is simultaneously connected to the guide lifting mechanism 270 and the guide translation assembly 280, the welding ribbon guide mechanism 250 can be set at the output end of the guide lifting mechanism 270, and the main body of the guide lifting mechanism 270 is set at the output end of the guide translation assembly 280; or the welding ribbon guide mechanism 250 is set at the output end of the guide translation assembly 280, and the main body of the guide translation assembly 280 is set at the output end of the guide lifting mechanism 270.

[0210] Continuing to supplement the stacking device 300, in the above-mentioned embodiment 2, the stacking device 300 includes a plurality of stacking tables 310, a stacking lifting mechanism 320 and a stacking translation mechanism 330; the stacking tables 310 are used to receive the string welding units 10, and the stacking lifting mechanism 320 is used to lift two adjacent stacking tables 310 to different heights, and then the stacking translation mechanism 330 is used to move the stacking tables 310 closer to each other in a straight line direction until the horizontal projections of the string welding units 10 thereon overlap, and then the stacking lifting mechanism 320 moves the stacking tables 310 closer to each other in a height direction so that the string welding units 10 overlap.

[0211] At this time, a plurality of string welding units 10 are stacked together to form a battery string 20 or a stacking assembly. In order to leave the stacking table 310 empty and facilitate the next stacking, it is necessary to transfer the stacked assembly (battery string 20 or stacking assembly). The following introduces two ways of transferring the stacked assembly:

[0212] Example 16.

[0213] Combine Example 1 with Example 2, or combine Example 1 with Example 3; for example, when the stacking device 300 includes multiple stacking platforms 310, a stacking lifting mechanism 320, a stacking translation mechanism 330, a stacking transport assembly and a stacking transfer platform, the stacking lifting mechanism 320 and the stacking translation mechanism 330 cooperate to complete the stacking of multiple string welding units 10 on the stacking platform 310 to form a stacking assembly; then, the stacking transport assembly takes away the stacked stacking assembly and transports it to the stacking transfer platform; after the stacking platform 310 is empty, the stacking lifting mechanism 320 and the stacking translation mechanism 330 cooperate to return the stacking platform 310 to the initial position, facilitating a new round of string welding unit 10 construction and stacking; after stacking the second stacking assembly, the stacking transport assembly moves the second stacking assembly to the stacking transfer platform, and stacks the second stacking assembly on the empty second end 2b of the welding strip of the first stacking assembly... Finally, a battery string 20 is formed on the stacking transfer platform.

[0214] Example 17.

[0215] The lamination device 300 further includes a lamination conveying mechanism 340 , which is disposed on one side of the lamination platform 310 and is capable of receiving the lamination string welding units 10 and conveying the string welding units 10 to the downstream.

[0216] The stack conveying mechanism 340 can be a conveyor belt assembly, a conveying platform, a conveying roller assembly, or other components capable of conveying items; in this embodiment, the stack conveying mechanism 340 is equivalent to integrating the stack handling assembly and the stack transfer platform. Fig.18 The stacking conveying mechanism 340 adopts a conveyor belt assembly. The string welding unit 10 completes stacking with the cooperation of the stacking platform 310, the stacking lifting mechanism 320 and the stacking translation mechanism 330. Subsequently, the stacking lifting mechanism 320 drives the stacking platform 310 to descend, and the stacked components fall onto the surface of the conveyor belt. The conveyor belt flows forward to move the stacked components out of the stacking platform 310.

[0217] In this embodiment, when the serial welding unit 10 is constructed in the lamination device 300, the serial welding unit 10 can be constructed on the lamination table 310 or on the lamination conveying mechanism 340.

[0218] When the string welding unit 10 is constructed on the stacking table 310, the stacking table 310 is higher than the conveying surface of the stacking conveying mechanism 340 to prevent the stacking conveying mechanism 340 from interfering with the construction of the string welding unit 10; until the stacking of the string welding unit 10 is completed, the stacking table 310 is lowered to drop the stacked components onto the stacking conveying mechanism 340.

[0219] When constructing the string welding unit 10 on the stacking conveying mechanism 340, the stacking table 310 is lower than the conveying surface of the stacking conveying mechanism 340 (that is, in the non-stacking state, the surface of the stacking table 310 supporting the string welding unit 10 is not higher than the surface of the stacking conveying mechanism 340 supporting the string welding unit 10); after the string welding unit 10 is constructed, a plurality of string welding units 10 to be stacked are arranged at intervals on the stacking conveying mechanism 340; before stacking, the stacking table 310 is made to correspond to the string welding units 10 on the stacking conveying mechanism 340 one by one; during stacking, the stacking lifting mechanism 320 drives the stacking table 310 to rise, pass through the stacking conveying mechanism 340, and lift up the corresponding string welding unit 10; after stacking is completed, the stacking lifting mechanism 320 drives the stacking table 310 to descend, so that the stacked components fall onto the stacking conveying mechanism 340, and the stacked components are transferred by the stacking conveying mechanism 340.

[0220] Furthermore, when multiple welding units 10 are stacked to form a stacking assembly, the stacking conveying mechanism 340 can intermittently operate so that a new round of stacking assemblies can be directly constructed on the vacant second end 2b of the welding strip of the previous round of stacking assemblies. Specifically, the stacking assembly falls onto the stacking conveying mechanism 340, and the stacking conveying mechanism 340 moves forward by one station, so that the vacant second end 2b of the welding strip of the stacking assembly is facing the first stacking platform 310 (that is, the stacking platform 310 corresponding to the first welding unit 10); in this way, if the welding unit 10 is constructed on the stacking conveying mechanism 340, the battery cells 1 of the new round, the first welding unit 10, can be directly laid on the vacant second end 2b of the welding strip of the previous round of stacking assemblies; if the welding unit 10 is constructed on the stacking platform 310, and the stacking is completed, the battery cells 1 of the first welding unit 10 can also fall on the vacant second end 2b of the welding strip of the previous round of stacking assemblies as the stacking platform 310 descends.

[0221] In order to prevent the sheet conveying mechanism 340 from interfering with the movement of the stacking platform 310, in one embodiment, a notch extending along the arrangement direction of the plurality of stacking platforms 310 may be provided on the stacking conveying mechanism 340, and the stacking platform 310 may be lifted, lowered and translated through the notch.

[0222] In another embodiment, the stacking conveying mechanism 340 may include at least two groups of conveying components (for example, two conveyor belts, two groups of conveying rollers, etc.) arranged at intervals, and the stacking platform 310 is located in the interval. At this time, the interval is equivalent to the "gap" in the previous embodiment, and the stacking platform 310 can be lifted, lowered and translated through the interval.

[0223] In another embodiment, the stacking table 310 includes two side support tables 311; the two side support tables 311 are arranged on both sides of the width direction of the stacking conveying mechanism 340; along the width direction, the string welding unit 10 partially protrudes from the stacking conveying mechanism 340; the two side support tables 311 can support the protruding edges of the string welding unit 10.

[0224] In this embodiment, the two sides of the string welding unit 10 protrude outside the stacking conveying mechanism 340; during stacking, the stacking lifting mechanism 320 drives the two side support platforms 311 to rise and be higher than the surface of the stacking conveying mechanism 340 that supports the string welding unit 10, so as to support the string welding unit 10 and thus achieve stacking; after stacking, the stacking lifting mechanism 320 drives the two side support platforms 311 to descend, so that the stacking assembly approaches and falls onto the stacking conveying mechanism 340.

[0225] In order to better support the string welding unit 10 , the stacking platform 310 further includes a middle support platform 312 disposed between the two side support platforms 311 ; the middle support platform 312 can pass through the stacking conveying mechanism 340 and support the middle part of the string welding unit 10 .

[0226] Reference Figures 18 to 20 By setting the middle support platform 312, it can cooperate with the side support platform 311 to better support the string welding unit 10. Further, the stacking platform 310 can include multiple middle support platforms 312, and the middle support platforms 312 correspond to the positions of the welding strips 2 of the string welding unit 10 one by one, so as to support the welding strips 2 of the string welding unit 10 and prevent the welding strips 2 from deviating due to lack of support during the lifting or translation process.

[0227] It should be noted that the stacking platform 310 may only include the middle support platform 312, and the middle support platform 312 holds up the middle part of the battery cell 1. When the string welding unit 10 does not include the press net 3, the stacking platform 310 includes both the side support platform 311 and the middle support platform 312, and the side support platform 311 and the middle support platform 312 can both be used to support the battery cell 1; or, when the string welding unit 10 includes the press net 3, the middle support platform 312 is used to lift the battery cell 1, and the side support platform 311 is used to lift the press net 3.

[0228] Furthermore, the surface of the string welding unit 10 supported by the middle support platform 312 is lower than the surface of the string welding unit 10 supported by the side support platform 311 .

[0229] Reference Fig. 20 The side support platforms 311 on both sides are higher than the middle support platform 312. This is because the mass of the pressing net 3 is relatively large. If the battery cell 1 is lifted up first, the battery cell 1 may be broken due to the pressure of the pressing net 3. For this reason, by setting a higher side support platform 311, when the stacking platform 310 is driven to rise by the stacking lifting mechanism 320, the side support platforms 311 will first contact the two sides of the pressing net 3 and lift the pressing net 3. Then, the middle support platform 312 will contact the battery cell 1 and lift the battery cell 1 and the welding strip 2.

[0230] Furthermore, by controlling the height difference between the middle support platform 312 and the side support platform 311, it is possible to achieve that when the side support platform 311 lifts the pressing net 3 and the pressing net 3 is not completely separated from the battery cell 1 and the welding strip 2, the middle support platform 312 lifts the battery cell 1 and the welding strip 2, thereby maintaining the pressure of the pressing net 3 on the battery cell 1 and the welding strip 2.

[0231] In order to facilitate the lifting and translation of the intermediate support platform 312, based on the above, a gap extending in a straight line direction can be provided on the stacking conveying mechanism 340, or at least two sets of spaced conveying members can be provided to use the gap as the gap. At this time, it should be noted that the welding ribbon 2 laid on the battery cell 1 needs to avoid the gap.

[0232] For example, the soldering ribbon 2 of the welding unit 10 can be placed on the stacking conveying mechanism 340. When the stacking table 310 rises and lifts the welding unit 10, the soldering ribbon 2 will not completely separate from the stacking conveying mechanism 340. In this way, the stacking conveying mechanism 340 has a certain supporting force on the soldering ribbon 2, which can prevent the soldering ribbon 2 from separating from the battery cell 1.

[0233] For another example, the middle support platform 312 can hold up the portion of the string welding unit 10 where the welding ribbon 2 is laid, thereby preventing the welding ribbon 2 from being separated from the battery cell 1 .

[0234] For another example, the lamination device 300 further includes a base 350 , and a notch 351 extending in a straight direction is formed on the base 350 , and the lamination platform 310 can pass through the notch 351 and move.

[0235] The stacking device 300 can be provided with a stacking conveying mechanism 340 and a base 350 at the same time. At this time, the upper surface of the base 350 is coplanar with the receiving surface of the stacking conveying mechanism 340 and jointly receives the string welding unit 10; specifically, a plurality of recessed grooves 353 can be provided on the surface of the base 350 for the placement of the conveying parts of the stacking conveying mechanism 340. For example, when the stacking conveying mechanism 340 uses a conveyor belt, the conveyor belt can be arranged in the recessed groove 353; the recessed groove 353 can play a guiding and positioning role, so as to facilitate the stable flow of the conveyor belt.

[0236] For example, the stack conveying mechanism 340 includes a plurality of conveyor belts arranged at intervals. Fig.18 and Fig.21 In order to prevent the conveyor belts from slipping or interfering with each other, the distance between adjacent conveyor belts is large, and for this reason, a base 350 is provided; the notch 351 on the base 350 can be set to the width of the middle support platform 312; in this way, the notch 351 can meet the movement of the middle support platform 312 while not interfering with the welding ribbon 2 due to being too large. In short, the base 350 can compensate for the notch or gap on the stacked sheet conveying mechanism 340, thereby preventing the welding ribbon 2 from falling off.

[0237] Of course, the stacking device 300 can only be provided with the base 350. In this case, the base 350 can be used to construct or receive the welding unit 10. During stacking, the stacking lifting mechanism 320 drives the stacking platform 310 to rise, pass through the notch 351, and lift the welding unit 10. After stacking, the stacking lifting mechanism 320 drives the stacking platform 310 to descend, so that the stacking assembly falls on the surface of the base 350, so as to facilitate transportation.

[0238] Furthermore, the base 350 is also provided with a welding belt groove 352 extending in a straight line direction; the welding belt 2 constituting the string welding unit 10 can fall into the welding belt groove 352. Fig.21 In the embodiment shown, nine welding strips 2 are laid on one battery cell 1; correspondingly, nine welding strip grooves 352 are provided on the base 350; the nine welding strip grooves 352 are arranged at intervals and side by side; when the string welding unit 10 is on the base 350, the battery cell 1 is placed on the surface of the base 350, and the welding strip 2 falls on the welding strip groove 352. By providing the welding strip groove 352, the position of the welding strip 2 can be limited, so that the welding strip 2 can be prevented from being offset when the stacking table 310 performs the stacking action. Specifically, when the stacking table 310 lifts the string welding unit 10, the second end 2b of the welding strip protruding from the string welding unit 10 will not be suspended, and its tail will still be in the welding strip groove 352, thereby ensuring the accuracy of the position of the welding strip 2.

[0239] When multiple stacking platforms 310 are lifted, lowered, or translated to achieve stacking, one of the stacking platforms 310 can be fixed; therefore, when a base 350 or a stacking conveying mechanism 340 is provided, the two can serve as a fixed stacking platform 310. However, since the serial welding unit 10 is located on the upper surface of the base 350 or the stacking conveying mechanism 340, the base 350 or the stacking conveying mechanism 340 can only serve as the stacking platform 310 at the lowest position during stacking, so that the serial welding units 10 lifted by other stacking platforms 310 can be stacked on top. For example, referring to Fig.18 When constructing the welding unit 10, the first welding unit 10 is directly constructed on the right side of the base 350; when stacking, the stacking table 310 on the left rises to a height that decreases from left to right, and then moves to the right until the horizontal projections of the welding units 10 overlap; in this way, the first welding unit 10 is constructed on the base 350, and the first welding unit 10 does not perform lifting or translational movement during the stacking process, waiting for the welding unit 10 on the left to be stacked.

[0240] In addition, the stacking table 310 needs to drive the string welding unit 10 to rise, fall and translate. In order to prevent the string welding unit 10 from shifting on the stacking table 310, an air hole 313 is opened on the stacking table 310, and the air hole 313 is connected to a negative pressure suction device; the negative pressure suction device can evacuate the air hole 313, so that a negative pressure is formed inside the air hole 313, and then the string welding unit 10 located on the stacking table 310 is adsorbed.

[0241] In this way, when the stacking lifting mechanism 320 drives the stacking platform 310 to rise and contact the string welding unit 10 , the negative pressure suction device can evacuate the air holes 313 so that the air holes 313 suck the string welding unit 10 .

[0242] For the string welding unit 10, only the battery cell 1 and the welding ribbon 2 are laid, and the relative position of the two is unstable. During the lamination process or the process of transferring the components after lamination, the battery cell 1 and the welding ribbon 2 may be relatively displaced, thereby affecting the accuracy of lamination. For this reason, the string welding unit 10 also includes a pressing screen 3; refer to Fig. 9 and Fig.10 The pressing net 3 is laid on the battery cell 1, and can press the welding ribbon 2 on the battery cell 1. Through the pressing net 3, the welding ribbon 2 can be pressed on the battery cell 1, thereby limiting the relative position of the welding ribbon 2 and the battery cell 1.

[0243] When the string welding unit 10 includes a press mesh 3, the battery string preparation device further includes a press mesh circulation device 400 for supplying the press mesh 3. Fig. 22 and Fig.23 The press mesh circulation device 400 includes: a press mesh loading mechanism 410, which can carry the press mesh 3 to press the welding ribbon 2 on the battery cell 1; and a press mesh conveying mechanism 420, which is arranged on one side of the press mesh loading mechanism 410 and can convey the press mesh 3 to the press mesh loading mechanism 410. The press mesh conveying mechanism 420 can continuously convey the press mesh 3 to the press mesh loading mechanism 410, so that the press mesh loading mechanism 410 can continuously output the press mesh 3.

[0244] The press net feeding mechanism 410 includes a press net extracting member 411 and a press net extracting driving assembly 412. The press net extracting driving assembly 412 is connected to the press net extracting member 411 and can drive the press net extracting member 411 to extract, transfer and lower the press net 3. The press net extracting member 411 can be an extracting member such as a suction cup and a clamp; the press net extracting driving assembly 412 can be a robot or a linear module combination (including a linear module moving in a vertical direction and a linear module moving in a horizontal direction).

[0245] The screen pressing and conveying mechanism 420 may adopt conveying components such as a conveying belt, a conveying roller, a conveying platform, and a transport crane.

[0246] When multiple welding strips 2 are laid on a battery cell 1, a pressing net 3 may include multiple groups of pressing pins, which can correspondingly press each welding strip 2 of the string welding unit 10. Further, a group of pressing pins includes multiple ones along the extending direction of the welding strip 2, that is, when a group of pressing pins is pressed on the corresponding welding strip 2, it can press a section of the welding strip 2 instead of a point, thereby better pressing the welding strip 2 and ensuring the stability of the welding strip 2.

[0247] Furthermore, unlike the battery cell 1 and the solder ribbon 2, the press screen 3 is not a consumable part and can be reused. To this end, the press screen recycling device 400 also includes a press screen unloading mechanism 430, which is arranged on one side of the press screen conveying mechanism 420 and can transport the used press screen 3 to the press screen conveying mechanism 420.

[0248] Among them, the structure of the press net unloading mechanism 430 is similar to that of the press net loading mechanism 410, including a press net extraction component 431 capable of extracting the press net 3, and a press net extraction driving component 432 capable of driving the press net extraction component 431 to extract, transfer and lower the press net 3, and the details are not repeated here.

[0249] After the string welding unit 10 is formed, the press mesh unloading mechanism 430 can remove the press mesh 3 pressed on the battery cell 1 and transfer the press mesh 3 to the press mesh conveying mechanism 420, and the press mesh conveying mechanism 420 can transport the press mesh 3 to the corresponding workstation of the press mesh loading mechanism 410, so that the press mesh 3 can be reused.

[0250] It should be added that when the first end 2a of the welding ribbon is connected to the upper surface of the battery cell 1 in a welding string unit 10, the welding ribbon 2 can be laid, and then the pressing net 3 can be moved to the battery cell 1 to press the welding ribbon 2 through the pressing net feeding mechanism 410. Alternatively, the welding string units 10 can be stacked first, and after multiple welding string units 10 form a stacking assembly or a battery string 20, the pressing net 3 can be moved to the battery cell 1 to press the welding ribbon 2.

[0251] In order to lay the pressing screen 3 on multiple string welding units 10 at the same time, two usage methods of the pressing screen circulation device 400 are introduced as follows:

[0252] Example 18.

[0253] The press net loading mechanism 410 and / or the press net unloading mechanism 430 can transport each press net 3 to a desired position one by one.

[0254] For example, when the pressing mesh loading mechanism 410 includes a pressing mesh extracting member 411 , the pressing meshes 3 on the pressing mesh conveying mechanism 420 can be moved to the corresponding battery cells 1 one by one during the process of constructing the string welding unit 10 .

[0255] For another example, when the press mesh unloading mechanism 430 includes a press mesh extractor 431 , after the string welding unit 10 is formed, the press meshes 3 on the battery cells 1 can be removed one by one and transferred to the press mesh conveying mechanism 420 .

[0256] It should be added that, before lamination, the plurality of string welding units 10 are arranged at intervals, and after lamination, the stacked string welding units 10 partially overlap; that is, before lamination, the spacing between two adjacent string welding units 10 is greater than the spacing between two adjacent string welding units 10 after lamination. It is easy to imagine that the spacing between the plurality of press mesh extraction members 411 on the press mesh feeding mechanism 410 is greater than the spacing between the plurality of press mesh extraction members 431 on the press mesh unloading mechanism 430.

[0257] If the press net loading mechanism 410 and the press net unloading mechanism 430 both transport the press nets 3 one by one, they can transport the press nets 3 one by one according to their respective working rhythms. The change in the spacing between the press nets 3 before and after the stacking will not affect the operation of the press net conveying mechanism 420 to the press net loading mechanism 410.

[0258] However, when the press net unloading mechanism 430 includes a press net extraction component 431, and the press net loading mechanism 410 includes multiple press net extraction components 411, and multiple press nets 3 are transported at the same time, the press net unloading mechanism 430 can take out the press nets 3 one by one, and place the press nets 3 on the press net conveying mechanism 420 at intervals according to the spacing when the press nets 3 are loaded; at this time, the press nets 3 on the press net conveying mechanism 420 can correspond one by one with the press net extraction component 411 of the press net loading mechanism 410, and the press net loading mechanism 410 can directly extract multiple press nets 3 from the press net conveying mechanism 420 at the same time.

[0259] Example 19.

[0260] The press net loading mechanism 410 and the press net unloading mechanism 430 both include a plurality of press net extractors, which can simultaneously extract a plurality of press nets 3 and transport the press nets 3 to a desired position, thereby improving work efficiency.

[0261] In this embodiment, the distance between the press mesh feeding mechanism 410 and the press mesh extracting member 411 is greater than the distance between the press mesh unloading mechanism 430 and the press mesh extracting member 431 .

[0262] In order to facilitate the extraction of the press mesh 3 on the press mesh conveying mechanism 420, multiple press mesh extraction components 411 of the press mesh loading mechanism 410 can be set to be relatively movable; in this way, when extracting the press mesh 3 on the press mesh conveying mechanism 420, the multiple press mesh extraction components 411 are close to each other so as to correspond one-to-one with the press mesh 3; when laying the press mesh 3 on the battery cell 1, the multiple press mesh extraction components 411 are away from each other so as to correspond one-to-one with the battery cell 1, and then all the press meshes 3 are lowered onto the corresponding battery cells 1 at the same time.

[0263] Alternatively, the screen pressing circulation device 400 also includes a screen pressing distance variable mechanism 440, which is arranged on one side of the screen pressing conveying mechanism 420, can receive the screen pressing 3 conveyed by the screen pressing conveying mechanism 420, and can transfer the screen pressing 3 to the screen pressing feeding mechanism 410; the screen pressing distance variable mechanism 440 includes: multiple screen pressing support platforms 441, each of which can bear a screen pressing 3; a distance variable driving component 442, which can drive the multiple screen pressing support platforms 441 to move relative to each other, so as to adjust the distance between two adjacent screen pressing support platforms 441.

[0264] Among them, when multiple pressing net supporting platforms 441 receive the pressing net 3 at the pressing net conveying mechanism 420, two adjacent pressing net supporting platforms 441 are spaced apart by a first distance; after receiving the pressing net 3, the variable pitch driving component 442 drives multiple pressing net supporting platforms 441 to move relative to each other, so that two adjacent pressing net supporting platforms 441 are spaced apart by a second distance, so as to facilitate a one-to-one correspondence between the pressing net extracting member 411 and the pressing net supporting platform 441.

[0265] In order to facilitate the transfer of the press net 3 on the press net conveying mechanism 420 to the press net pitch changing mechanism 440, in one embodiment, a press net transfer mechanism (not shown) can be set; the press net transfer mechanism is similar to the press net unloading mechanism 430, including multiple press net extraction parts, and extraction drive components that can drive the extraction parts to extract, transfer and lower the press net 3; at this time, the multiple press net extraction parts of the press net transfer mechanism can correspond one by one to the press net 3 on the press net conveying mechanism 420, and then transfer multiple press nets 3 to the press net carrier 441 at one time.

[0266] In another embodiment, the press net conveying mechanism 420 can be omitted, and the press net unloading mechanism 430 directly transfers the multiple press nets 3 to the press net variable pitch mechanism 440. At this time, multiple press net bearing platforms 441 are arranged at a first distance and interval on the conveying path of the press net unloading mechanism 430; after the press net unloading mechanism 430 extracts the used press net 3, it can directly transport the press net 3 to the top of each press net bearing platform 441; multiple press net extracting members 431 correspond to multiple press net bearing platforms 441 one by one; after the press net unloading mechanism 430 releases the press net 3, and the press net bearing platform 441 receives the press net 3, the variable pitch driving component 442 drives the press net bearing platform 441 to be arranged at a second distance interval, so that multiple press net bearing platforms 441 correspond to multiple press net extracting members 411 one by one.

[0267] In another embodiment, the press net conveying mechanism 420 directly transfers the plurality of press nets 3 to the press net distance changing mechanism 440. Fig.23 and Fig.24The press net bearing platform 441 includes: a support plate 4411 for receiving the press net 3; a press net lifting assembly 4414, which is connected to the support plate 4411 and can drive the support plate 4411 to move in the vertical direction. Specifically, when the press net conveying mechanism 420 conveys the press net 3, the support plate 4411 is not higher than the surface of the press net conveying mechanism 420 receiving the press net 3, so as to avoid the support plate 4411 interfering with the conveying of the press net 3; after the press net conveying mechanism 420 conveys the press net 3 until the press net 3 and the support plate 4411 correspond one to one, the press net lifting assembly 4414 drives the support plate 4411 to rise, and the support plate 4411 passes through the press net conveying mechanism 420 and lifts the press net 3, so that the press net 3 is separated from the press net conveying mechanism 420; the variable pitch drive assembly 442 then drives the support plate 4411 to move horizontally to realize the change of the spacing of the press net 3. Among them, the press net lifting assembly 4414 can adopt driving components such as electric cylinders and linear modules. In addition, a gap may be provided on the screen pressing and conveying mechanism 420 for the support plate 4411 to move; or, the screen pressing and conveying mechanism 420 may include at least two groups of conveying components arranged at intervals, so that the support plate 4411 can move through the intervals.

[0268] Furthermore, in this embodiment, in order to prevent the pressing net 3 from falling or shifting during the lifting and translation of the support plate 4411, the support platform 441 also includes a pressing net fixing component, which is arranged on one side of the support plate 4411 and can fix the pressing net 3 on the support plate 4411. The pressing net fixing component can be a suction cup or suction hole arranged on the support plate 4411, which can suck the pressing net 3 on the support plate 4411; or the pressing net fixing component can be a clamp arranged on the support plate 4411, which can clamp the pressing net 3; or the pressing net fixing component can be a surrounding clamping block, which can clamp the pressing net 3 and thus limit the position of the pressing net 3; or, referring to Fig.24 , one side of the support plate 4411 has a protrusion, and the pressing net fixing assembly includes: a clamping block 4412, which is movably arranged on the other side of the support plate 4411 relative to the protrusion; a clamping block driving member 4413 (which can adopt a cylinder, electric cylinder or other driving member), which is connected to the clamping block 4412 and can drive the clamping block 4412 to move toward the protrusion, thereby clamping the pressing net 3 between the clamping block 4412 and the protrusion.

[0269] Furthermore, the press mesh variable pitch mechanism 440 also includes a press mesh buffer platform 443, which is arranged on the path where the variable pitch driving component 442 drives the press mesh supporting platform 441 to move; after the pitch is changed, the press mesh lifting component 4414 drives the support plate 4411 to descend, and the press mesh 3 on the support plate 4411 can fall on the press mesh buffer platform 443.

[0270] It is easy to understand that when the press net feeding mechanism 410 carries the press net 3 after the pitch change, it can directly receive the press net 3 from each press net carrying platform 441. However, by setting the press net buffer platform 443, after the pitch change, the press net carrying platform 441 can put the press net 3 on the press net buffer platform 443, and the press net feeding mechanism 410 can extract the press net 3 from the press net buffer platform 443; and the press net carrying platform 441 can return to the press net conveying mechanism 420, waiting to receive the next group of press nets 3 to be pitch-changed, thereby speeding up the feeding speed of the press nets 3.

[0271] Reference Fig.23 , the net pressing buffer platform 443 is arranged downstream of the net pressing transmission mechanism 420; the net pressing buffer platform 443 includes two buffer platforms arranged at intervals, and when the variable pitch drive component 442 drives the net pressing support platform 441 to translate, the net pressing support platform 441 will move between the two buffer platforms; at this time, both sides of the net pressing 3 protrude from the net pressing support platform 441; the net pressing lifting component 4414 drives the support plate 4411 to descend, and both sides of the net pressing 3 will fall onto the two buffer platforms; thus, the net pressing 3 is received by the two buffer platforms, and the variable pitch drive component 442 drives the net pressing support platform 441 to return.

[0272] Furthermore, the variable pitch drive assembly 442 is used to drive the plurality of screen pressing platforms 441 to move relative to each other, so that the distance between the screen pressing platforms 441 becomes smaller, or the distance between the screen pressing platforms 441 becomes larger.

[0273] The plurality of screen pressing platforms 441 are arranged along a straight line. The arrangement direction of the plurality of screen pressing platforms 441 is called a straight line direction. When the plurality of screen pressing platforms 441 move relatively and change their distance, it is most efficient to move along the straight line direction.

[0274] Among them, any pressing net supporting platform 441 can move in a straight line direction under the drive of the variable pitch driving component 442; or, among multiple pressing net supporting platforms 441, the first or last pressing net supporting platform 441 is relatively fixedly arranged in a straight line direction.

[0275] It should be added that, among the multiple screen pressing platforms 441, the first or last screen pressing platform 441 can be used as a reference platform. At this time, the reference platform does not perform pitch change movement, and the distance between all screen pressing platforms 441 can also be changed by moving the other screen pressing platforms 441 closer or farther away. By setting the reference platform, it can be ensured that after each pitch change, all screen pressing platforms 441 return to the preset position.

[0276] In one embodiment, the variable pitch drive assembly 442 includes a plurality of variable pitch drive members 4421, and the variable pitch drive members 4421 correspond one by one to the press net support platforms 441 that need to perform variable pitch motion, and each press net support platform 441 can move in a straight line under the drive of the variable pitch drive members 4421. Fig.25When the pitch needs to be changed, the pitch-changing driving member 4421 drives the corresponding screen pressing platform 441 to move closer to or away from the adjacent screen pressing platform 441 .

[0277] The variable pitch drive member 4421 may be a drive member such as a pneumatic cylinder or an electric cylinder.

[0278] In another embodiment, the variable distance drive assembly 442 includes a variable distance drive member 4421 and a plurality of variable distance connecting members 4422, and a variable distance connecting member 4422 is provided between two adjacent press mesh support platforms 441; any variable distance connecting member 4422 extends in a straight line direction, and the press mesh support platform 441 is slidably arranged on the variable distance connecting member 4422; the variable distance drive member 4421 is connected to the first or last press mesh support platform 441.

[0279] It should be added that, in this embodiment, among the first or last mesh pressing platform 441, a mesh pressing platform 441 that is not connected to the variable pitch driving member 4421 can be used as a reference platform and fixedly arranged. However, a variable pitch connecting member 4422 is also arranged between the reference platform and an adjacent mesh pressing platform 441.

[0280] Reference Fig. 27 and Fig.28 , the variable pitch drive member 442 is connected to the leftmost screen pressing platform 441. After receiving the screen pressing 3, the variable pitch drive member 442 drives the screen pressing platform 441 to move to the left along the variable pitch connection member 4422 and away from the screen pressing platform 441 on the right; after the two leftmost screen pressing platforms 441 move to the end of the variable pitch connection member 4422, the second adjacent screen pressing platform 441 is pulled out and moves to the left along the second variable pitch connection member 4422; the second screen pressing platform 441 moves to the end of the second variable pitch connection member 4422, and the third screen pressing platform 441 is pulled out... In this way, the variable pitch drive member 4421 can "pull apart" each screen pressing platform 441 one by one, so that the interval between two adjacent screen pressing platforms 441 becomes larger. When it is necessary to return to the screen pressing transmission mechanism 420 to receive the screen pressing 3, the variable-distance driving component 442 drives the leftmost screen pressing platform 441 to move to the right along the variable-distance connecting component 4422 until the screen pressing platform 441 contacts the adjacent second screen pressing platform 441, or moves to the other end of the variable-distance connecting component 4422, thereby driving the second screen pressing platform 441 to move to the right... In this way, the variable-distance driving component 4421 "closes" each screen pressing platform 441 one by one, so that the interval between the two adjacent screen pressing platforms 441 becomes smaller.

[0281] The variable pitch connector 4422 may be a connecting mechanism such as a connecting rod or a cam structure.

[0282] It should be added that, in this embodiment, one of the two adjacent pressing net bearing platforms 441 can be fixedly connected to the variable distance connection member 4422, so as to facilitate "opening" or "closing" the pressing net bearing platform 441. Alternatively, the variable distance connection member 4422 can have a limiting member (such as a sleeve) to limit the distance between the two adjacent pressing net bearing platforms 441 and facilitate "opening" or "closing" the pressing net bearing platform 441 to a preset degree.

[0283] In another embodiment, referring to Fig.26 , the variable pitch drive assembly 442 includes a variable pitch drive member 4421, which can drive all the pressing net bearing platforms 441 to move simultaneously in another direction perpendicular to the straight line direction in the horizontal plane; at the same time, the variable pitch drive assembly 442 also includes a plurality of variable pitch guide members 4423, each variable pitch guide member is arranged radially; in this way, when it is necessary to adjust to the second distance, the variable pitch drive member 4421 drives the pressing net bearing platform 441 to move in the radial direction along the variable pitch guide member 4423, so that each pressing net bearing platform 441 is separated from each other; when it is necessary to adjust to the first distance, the variable pitch drive member 4421 drives the pressing net bearing platform 441 to move in the contraction direction along the variable pitch guide member 4423, so that each pressing net bearing platform 441 is close to each other. Among them, the variable pitch guide member 4423 can adopt a guide member such as a guide rod, a guide rail, a cam structure, etc.

[0284] Of course, the plurality of screen pressing platforms 441 may also move along the arc direction, as long as the spacing between the screen pressing platforms 441 can be changed. The present application does not limit the specific structure of the variable pitch drive assembly 442.

[0285] In addition, the feeding efficiency of the press net loading mechanism 410 and the unloading efficiency of the press net unloading mechanism 430 are not necessarily consistent. For example, the speed at which the press net unloading mechanism 430 carries the used press net 3 to the press net conveying mechanism 420 may be faster than the speed at which the press net loading mechanism 410 extracts the press net 3 from the press net conveying mechanism 420; in this case, the press net conveying mechanism 420 will convey more press nets 3 than those needed by the press net loading mechanism 410.

[0286] In order to prevent the excess press mesh 3 from entering the press mesh pitch changing mechanism 440 and affecting the accurate operation of the press mesh pitch changing mechanism 440, refer to Fig.23 The screen pressing circulation device 400 also includes a screen pressing stopping mechanism 450, which is arranged on the transmission path of the screen pressing conveying mechanism 420; the screen pressing stopping mechanism 450 includes: a stopping member 451 and a stopping driving assembly 452, the stopping driving assembly 452 is connected to the stopping member 451, and can drive the stopping member 451 to move toward the screen pressing conveying mechanism 420, so that the stopping member 451 blocks the screen pressing 3 on the screen pressing conveying mechanism 420 and prevents the screen pressing 3 from continuing to be transmitted forward.

[0287] The stopper 451 can be a baffle, a block, a lever or other intercepting member; the stopper driving assembly 452 can be a cylinder, an electric cylinder or other driving member. The screen pressing stopper mechanism 450 is arranged upstream of the screen pressing pitch changing mechanism 440; after the screen pressing 3 corresponding to the number of screen pressing bearing platforms 441 flows into the screen pressing pitch changing mechanism 440, the stopper driving assembly 452 drives the stopper 451 to extend and block the screen pressing conveying surface of the screen pressing conveying mechanism 420, thereby preventing the following screen pressing 3 from continuing to enter the screen pressing pitch changing mechanism 440.

[0288] As for the screen pressing stop mechanism 450, in the non-stop state, it can be arranged below the screen pressing conveying mechanism 420; at this time, the stop member 451 is lower than the conveying surface of the screen pressing conveying mechanism 420; when it is necessary to stop, the stop driving assembly 452 drives the stop member 451 to move upward, so that the stop member 451 extends out and passes through the screen pressing conveying mechanism 420. Alternatively, in the non-stop state, the screen pressing stop mechanism 450 can be arranged above the screen pressing conveying mechanism 420; when it is necessary to stop, the stop driving assembly 452 drives the stop member 451 to move downward, so that the stop member 451 extends toward the screen pressing conveying mechanism 420. Alternatively, in the non-stop state, the screen pressing stop mechanism 450 can be arranged on one side of the screen pressing conveying mechanism 420; when it is necessary to stop, the stop driving assembly 452 drives the stop member 451 to move horizontally, so that the stop member 451 extends toward the screen pressing conveying mechanism 420.

[0289] Furthermore, the screen pressing stop mechanism 450 also includes a counter 453, which is arranged downstream of the stop member 451 and can count the number of screen pressing 3 passing through. For example, when the screen pressing distance changing mechanism 440 includes four screen pressing platforms 441, each time the distance changes, the screen pressing stop mechanism 450 needs to allow four screen pressing 3 to pass through, so that each screen pressing platform 441 can independently receive a screen pressing 3; before the distance changes, when the counter 453 counts that the fourth screen pressing 3 passes through, the information is fed back to the control system, and the control system controls the stop driving component 452 to drive the stop member 451 to move toward the screen pressing conveying mechanism 420 to block the screen pressing 3 behind, thereby preventing too many screen pressing 3 from flowing into the screen pressing distance changing mechanism 440, and ensuring the accurate operation of the equipment.

[0290] In addition, during the process of the pressing net unloading mechanism 430 transferring the pressing net 3 and the pressing net conveying mechanism 420 conveying the pressing net 3, the position state of the pressing net 3 may change, thereby affecting the operation of the pressing net variable distance mechanism 440 and the pressing net feeding mechanism 410. Fig.23 The screen pressing circulation device 400 also includes a screen pressing straightening mechanism 460, which includes: a first straightening member 461 and a second straightening member 462, which are respectively arranged on both sides of the width direction of the screen pressing transmission mechanism 420; and a straightening driving member 463, which can drive the first straightening member 461 and the second straightening member 462 to move relative to each other.

[0291] The first aligning member 461 and the second aligning member 462 may be components with horizontal push surfaces such as push plates and rows of followers; the aligning driving member 463 may be a driving member such as a cylinder or an electric cylinder.

[0292] The press net straightening mechanism 460 is arranged on the conveying path of the press net conveying mechanism 420, and can straighten the press net 3 before the press net 3 is input into the press net pitch changing mechanism 440. During straightening, the press net straightening mechanism 460 can straighten each press net 3 one by one, or can straighten multiple press nets 3 at the same time. For example, when the press net pitch changing mechanism 440 includes four press net bearing platforms 441, the press net straightening mechanism 460 can straighten four press nets 3 at a time, so as to ensure the processing speed of the equipment.

[0293] In a specific embodiment, referring to Fig.23 The screen pressing and correcting mechanism 460 is arranged on both sides of the corresponding position of the screen pressing platform 441. After the required number of screen pressings 3 are in place, the correcting driving member 463 can drive the first correcting member 461 and the second correcting member 462 to move towards each other, "shooting" the screen pressings 3 in unison, so that the position states of all the screen pressings 3 are unified. Subsequently, the screen pressing platform 441 lifts the corresponding screen pressings 3 from bottom to top, and then changes the distance.

[0294] Among them, one of the first and second calibrating members 461 and 462 can be fixed, and the other can move under the drive of the calibrating driving member 463. Alternatively, the two calibrating members can move independently relative to each other; for example, the calibrating driving member 463 includes two driving components, each of which can drive one calibrating member to move toward the other calibrating member.

[0295] It should be added that in order to prevent the screen pressing conveying mechanism 420 from transmitting the screen pressing 3 out, a blocking member 470 is also provided on the screen pressing conveying mechanism 420; the blocking member 470 can be any stopping member such as a baffle or a block; the blocking member 470 can be directly provided on the conveying surface of the screen pressing conveying mechanism 420, and the screen pressing 3 is conveyed forward and will eventually be blocked by the blocking member 470, so that the screen pressing 3 stays at the preset position, further facilitating the screen pressing distance changing mechanism 440 to receive the screen pressing 3.

[0296] Furthermore, a detection member, such as a proximity sensor, may be provided on the blocking member 470 to detect whether the pressing net 3 is in place.

[0297] In a specific embodiment, four string welding units 10 are constructed at the same time, and the string welding units 10 are stacked; at this time, the battery string preparation device provided by the present application mainly includes four processes: battery cell loading, welding strip loading, web pressing loading and stacking; wherein, the battery cell loading process is as follows:

[0298] The cell conveying mechanism 110 conveys four cells 1 to corresponding stations of the cell handling mechanism 120;

[0299] The detection element 123 takes a photo of the battery cell 1 and transmits the position status information of each battery cell 1 to the control system;

[0300] The control system controls the cell transport driving member 122 to move, drives the cell extracting member 121 to extract the corresponding cells 1 one by one, and makes the extracted cells 1 have a uniform position state;

[0301] After the cell transport mechanism 120 obtains four cell sheets 1, the cell transport driving member 122 further drives four cell extracting members 121 to move toward the stacking device 300;

[0302] Finally, four battery cells 1 are released onto the corresponding lamination platforms 310 .

[0303] The process of soldering ribbon feeding is as follows:

[0304] The solder strip unwinding mechanism 210 releases a group of solder strips at the same time;

[0305] The welding strip lifting mechanism 260 drives the welding strip cutting mechanism 220 to descend, and the guide lifting mechanism 270 drives the welding strip guiding mechanism 250 to descend, so that the welding strip pulling mechanism 230 can pull the material strip to move downstream;

[0306] The material strip passes through four sets of welding strip bending mechanisms 240, four sets of welding strip cutting mechanisms 220 and four sets of welding strip guiding mechanisms 250 in sequence, and is pulled out to a preset length;

[0307] The solder strip lifting mechanism 260 drives the solder strip cutting mechanism 220 to rise, so that the material strip falls between the corresponding blades;

[0308] The guide lifting mechanism 270 drives the welding strip guide mechanism 250 to rise, so that the strip falls into the guide groove, and the front clamp 252 and the rear clamp 253 cooperate to clamp the two ends of the strip in the guide groove;

[0309] The welding strip bending mechanism 240 acts on the material strip to form four spaced bends on the material strip;

[0310] When a new round of solder strip is prepared, the bent material strip will enter the solder strip cutting mechanism 220 under the traction of the solder strip traction mechanism 230;

[0311] The solder strip cutting mechanism 220 simultaneously cuts the material strips at the corresponding positions, cutting off four solder strips 2;

[0312] The solder strip lifting mechanism 260 drives the solder strip cutting mechanism 220 to descend to expose the free end of the material strip;

[0313] The pre-traction assembly 231 of the welding strip traction mechanism 230 returns to the initial position, and pulls the free end of the material strip to pull the material strip to a desired length;

[0314] The ribbon pulling assembly 232 of the ribbon pulling mechanism 230 moves to the corresponding ribbon 2 , pulls one ribbon 2 respectively, and pulls the ribbon 2 to the corresponding lamination platform 310 .

[0315] The process of pressing the web is as follows:

[0316] The press net conveying mechanism 420 conveys four press nets 3 to the top of the press net pitch changing mechanism 440;

[0317] The stop driving assembly 452 drives the stop member 451 to stop on the conveying surface of the press mesh conveying mechanism 420 to prevent excess press mesh 3 from flowing to the press mesh distance changing mechanism 440;

[0318] The blocking member 470 blocks the four pressing nets 3, so that the four pressing nets 3 stay above the pressing net distance changing mechanism 440;

[0319] The alignment driving member 463 drives the first alignment member 461 and the second alignment member 462 to move toward each other to align the four pressing nets 3;

[0320] After the correction is completed, the first correcting member 461 and the second correcting member 462 release the pressing net 3, and the pressing net lifting assembly 4414 drives the corresponding supporting plate 4411 to rise, and lifts up the pressing net 3 on the pressing net conveying mechanism 420;

[0321] The clamp block driving member 4413 drives the clamp block 4412 to move toward the protrusion, thereby clamping the press net 3 between the clamp block 4412 and the protrusion, so that the press net 3 is fixed on the support plate 4411;

[0322] The variable pitch drive assembly 442 drives the four pressing net bearing platforms 441 and the four pressing nets 3 thereon to move in a direction away from the pressing net conveying mechanism 420, thereby pulling the four pressing net bearing platforms 441 apart, so that two adjacent pressing net bearing platforms 441 are spaced apart by a second distance;

[0323] The press net feeding mechanism 410 includes four press net extracting members 411 . Driven by the press net extracting driving assembly 412 , the four press net extracting members 411 simultaneously extract four press nets 3 and deliver the press nets 3 to the corresponding lamination platforms 310 .

[0324] The lamination process is as follows:

[0325] The stacking device 300 includes four stacking stages 310. In one working cycle, any stacking stage 310 can sequentially receive a battery cell 1, a set of welding ribbons 2 and a pressing net 3. The welding ribbon 2 is laid on the battery cell 1, and the pressing net 3 is further laid on the welding ribbon 2, thereby forming a string welding unit 10 on the stacking stage 310.

[0326] The stacking lifting mechanism 320 drives the corresponding stacking platform 310 to rise, so that the four stacking platforms 310 are moved from left to right (refer to Fig.19 ), height decreasing;

[0327] The lamination translation mechanism 330 drives the corresponding lamination platform 310 to move from left to right, so that the horizontal projections of the string welding units 10 on two adjacent lamination platforms 310 overlap;

[0328] The stacking lifting mechanism 320 drives the corresponding stacking platform 310 to descend, so that the left string welding unit 10 is stacked on the right string welding unit 10;

[0329] The stacking lifting mechanism 320 continues to drive the stacking table 310 to descend, so that the stacked string welding units 10 fall onto the conveying surface of the stacking conveying mechanism 340. The stacking conveying mechanism 340 transports the stacked string welding unit group forward to empty the stacking table 310 and its corresponding workstation, facilitating the construction of the next round of string welding units 10.

[0330] The present application also discloses a string welding device, including the above-mentioned battery string preparation device, and also includes a welding device 500; the welding device 500 is arranged downstream of the stacking device 300, and can weld the string welding unit 10 to facilitate shaping of the battery cell 1 and the welding strip 2.

[0331] The battery string 20 is formed by stacking a plurality of string welding units 10. However, the connection between the battery cell 1 and the welding strip 2 is unstable and easily loosened by stacking the cells alone. Therefore, a welding device 500 is required to weld the battery cell 1 and the welding strip 2 together.

[0332] In one embodiment, the welding device 500 achieves bonding of the battery cell 1 and the welding strip 2 by thermal welding. To this end, a soldering flux needs to be applied to the battery cell 1 and / or the welding strip 2 at the connection position between the two; for example, referring to Fig.13 A flux spraying mechanism 3 is provided downstream of the solder ribbon unwinding mechanism 210; the flux spraying mechanism 3 can apply flux to the solder ribbon 2. During welding, the flux is hot-melted and can bond the battery cell 1 and the solder ribbon 2, thereby shaping the battery string 20.

[0333] Reference Fig.23 The welding device 500 includes: a welding box 510, which can weld the string welding unit 10; and a welding conveying mechanism 520, which can receive the stacked string welding unit 10 in the stacking device 300 and input the string welding unit 10 into the welding box 510.

[0334] Among them, an infrared lamp and a probe are arranged in the welding box 510. The probe can press the entering string welding unit 10, thereby shaping the string welding unit 10 and preventing the string welding unit 10 from shifting; the infrared lamp generates heat to achieve the bonding of the battery cell 1 and the welding strip 2.

[0335] Among them, the welding transmission mechanism 520 can adopt a conveyor belt; the input end of the conveyor belt is connected to the stacking device 300, and can receive the stacked string welding unit 10 on the stacking device 300; the welding box 510 is set on the transmission path of the conveyor belt; the stacked string welding unit 10 can be sent into the welding box 510 by the conveyor belt, and finally the welding is completed.

[0336] Furthermore, a plurality of preheating mechanisms (eg, heating rods) may be provided in the welding conveying mechanism 520 to preheat the welding unit 10 before the welding unit 10 enters the welding box 510 , thereby accelerating the welding efficiency.

[0337] In addition, the welding conveying mechanism 520 can be integrated with the stacking conveying mechanism 340; for example, the stacking conveying mechanism 340 is omitted, or the output end of the stacking conveying mechanism 340 is directly connected to the input end of the welding conveying mechanism 520; in this way, the stacked string welding unit group can be directly sent to the welding box 510. When the welding box 510 welds the previous stacking assembly, the stacking device 300 continues to build a new stacking assembly, thereby improving work efficiency.

[0338] Specifically, when the stacking conveying mechanism 340 is omitted, the welding conveying mechanism 520 includes a plurality of conveyor belts arranged side by side and at intervals; the stacking table 310 is arranged below the input side of the welding conveying mechanism 520, and can pass through the gap between two adjacent conveyor belts and lift up the upper welding unit 10 under the drive of the stacking lifting mechanism 320; and further translate along the gap under the drive of the stacking translation mechanism 330; after the stacking is completed, the stacked stacking assembly falls onto the conveyor belt, and the conveyor belt can directly deliver the stacked welding unit 10 into the welding box 510 to complete the welding.

[0339] It should be added that the "linear direction" is mentioned many times in the specification. In each embodiment, the "linear direction" represents the direction defined by each embodiment. However, in a specific embodiment, these "linear directions" can be the same. Fig. 22 At this time, the pulling direction of the material strip, the conveying direction of the battery cell 1, the conveying direction of the pressing net 3, the stacking direction of the string welding unit 10, and the conveying direction of welding are all left and right. Through such a same-direction setting, the construction, stacking and welding of the string welding unit 10 can be simplified, the equipment space layout can be optimized, and the work efficiency can be improved.

Claims

1. A battery string preparation device, It is characterized in that include: A battery cell feeding device (100) is used to supply battery cells (1), the battery cell feeding device (100) comprising: A battery cell conveying mechanism (110) for conveying the battery cells (1); A battery cell transport mechanism (120) is used to extract the battery cell (1) on the battery cell conveying mechanism (110) and to deliver the battery cell (1) into a stacking device (300); the battery cell transport mechanism (120) comprises: A battery cell extraction member (121) used for extracting a battery cell (1); A battery cell transport driving member (122) connected to the battery cell extracting member (121) and capable of driving the battery cell extracting member (121) to extract and transfer the battery cell (1); a detection member (123), wherein a working end of the detection member (123) is directly opposite to the battery cell conveying mechanism (110) and is capable of detecting the state of the battery cell (1) on the battery cell conveying mechanism (110), so that the battery cell transporting driving member (122) drives the battery cell extracting member (121) to accurately extract and transfer the battery cell (1); a solder strip feeding device (200) for supplying solder strips (2); The stacking device (300) is arranged downstream of the battery cell feeding device (100) and the solder strip feeding device (200), and is capable of receiving the battery cell (1) supplied by the battery cell feeding device (100) and the solder strip (2) supplied by the solder strip feeding device (200); the stacking device (300) comprises: A plurality of lamination stages (310) for receiving a series welding unit (10) composed of a battery cell (1) and a welding strip (2); the plurality of lamination stages (310) are arranged along a straight line and are each capable of receiving a series welding unit (10); A lamination drive mechanism is capable of laminating the string welding unit (10), the lamination drive mechanism comprising: A lamination lifting mechanism (320) connected to the lamination platform (310) and capable of driving the lamination platform (310) to move in a vertical direction; Wherein, any of the stacking platforms (310) can move in a vertical direction under the drive of the stacking lifting mechanism (320); or, one of the stacking platforms (310) is relatively fixedly arranged in a vertical direction; A lamination translation mechanism (330) connected to the lamination platform (310) and capable of driving the lamination platform (310) to move in a linear direction; Wherein, any of the lamination platforms (310) can move along the straight line direction under the drive of the lamination translation mechanism (330); or, one of the lamination platforms (310) is relatively fixedly arranged along the straight line direction; The straight line direction is the arrangement direction of the plurality of lamination stages (310); The series welding unit (10) is formed by laying out a battery cell (1) and a welding ribbon (2); in any of the series welding units (10), the first end (2a) of the welding ribbon (2) is located on the battery cell (1), while the second end (2b) protrudes from the battery cell (1); A plurality of string welding units (10) are stacked to form a battery string (20); in the battery string (20), any two adjacent string welding units (10), wherein the battery sheet (1) of one of the string welding units (10) is stacked on the second end (2b) of the welding strip of another of the string welding units (10).

2. The battery string preparation device according to claim 1, It is characterized in that The battery cell transport mechanism (120) comprises a plurality of battery cell extraction members (121), wherein the plurality of battery cell extraction members (121) are arranged at intervals along a straight line at the movable end of the battery cell transport driving member (122); The detection element (123) adopts a CCD camera, and the CCD camera can take a picture of the battery cell (1) on the battery cell conveying mechanism (110), thereby obtaining the position state of the battery cell (1); The battery cell transport driving member (122) is a robot, and the robot is capable of controlling the plurality of battery cell extracting members (121) to extract or release the battery cells (1) one by one; According to the position state of the battery cell (1), the robot can adjust the direction of the battery cell extraction member (121) so that the position states of the battery cells (1) extracted by the plurality of battery cell extraction members (121) are unified.

3. The battery string preparation device according to claim 1, It is characterized in that The welding strip feeding device (200) comprises: A soldering ribbon unwinding mechanism (210), used for releasing the soldering ribbon material strip; A solder strip cutting mechanism (220), arranged downstream of the solder strip unwinding mechanism (210), capable of cutting the solder strip material strip; The solder tape pulling mechanism (230) is capable of pulling out a solder tape material strip from the solder tape unwinding mechanism (210) and pulling the solder tape material strip through the solder tape cutting mechanism (220) so as to facilitate the solder tape cutting mechanism (220) to cut the solder tape material strip.

4. The battery string preparation device according to claim 3, It is characterized in that The solder strip feeding device (200) further comprises a solder strip bending mechanism (240), which is arranged downstream of the solder strip unwinding mechanism (210) and is capable of bending the solder strip material strip or the solder strip (2) so that the extension directions of the solder strip first end (2a) and the solder strip second end (2b) are no longer collinear.

5. The battery string preparation device according to any one of claims 1 to 4, It is characterized in that It also includes a pressing mesh circulation device (400) capable of supplying the pressing mesh (3) to the laminating device (300); the pressing mesh circulation device (400) includes: A press net loading mechanism (410) is arranged on one side of the lamination device (300) and is capable of transporting the press net (3) into the lamination device (300); A press mesh conveying mechanism (420) capable of conveying the press mesh (3) to the press mesh feeding mechanism (410); After the battery cell (1) and the welding strip (2) are laid together, the welding strip (2) can be pressed onto the battery cell (1) by a pressing net (3).

6. The battery string preparation device according to claim 5, It is characterized in that The press mesh circulation device (400) further comprises a press mesh pitch-changing mechanism (440), which is arranged on one side of the press mesh conveying mechanism (420) and is capable of receiving the press mesh (3) conveyed by the press mesh conveying mechanism (420) and delivering the press mesh (3) to the press mesh feeding mechanism (410); the press mesh pitch-changing mechanism (440) comprises: A plurality of screen pressing platforms (441), each capable of receiving a screen pressing (3); The variable pitch drive assembly (442) is capable of driving the plurality of the mesh pressing support platforms (441) to move relative to each other, so as to adjust the distance between two adjacent mesh pressing support platforms (441).

7. A string welding device, It is characterized in that The battery string preparation device comprises the battery string preparation device according to any one of claims 1 to 4, and further comprises a welding device (500), which is arranged downstream of the stacking device (300) and is capable of welding the string welding unit (10) to facilitate shaping of the battery cell (1) and the welding strip (2).

8. The string welding device according to claim 7, It is characterized in that The welding device (500) comprises: A welding box (510) capable of welding the string welding unit (10); The welding conveying mechanism (520) is capable of receiving the stacked string welding units (10) in the stacking device (300) and inputting the string welding units (10) into the welding box (510).

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