Welding ribbon feeding device and battery string preparation device

Abstract

The present application discloses a welding tape feeding device, which includes a welding tape unwinding mechanism, a welding tape cutting mechanism and a welding tape traction mechanism; multiple groups of welding tape cutting mechanisms are arranged at intervals in a straight line direction; the welding tape material strip released by the welding tape unwinding mechanism is pulled by the welding tape traction mechanism and passes through each welding tape cutting mechanism in turn; the welding tape cutting mechanism cuts the material strip to obtain multiple groups of welding tapes; thus, the welding tape feeding device can supply multiple groups of material strips at a time, thereby speeding up the preparation efficiency of battery strings. The welding tape feeding device also includes a welding tape lifting mechanism, which can drive the welding tape cutting mechanism to approach or move away from the material strip to facilitate the walking or cutting of the material strip. The present application also discloses a battery string preparation device, including the above-mentioned welding tape feeding device, and also including a battery cell feeding device and a stacking device; the stacking device can receive a string welding unit composed of a battery cell and a welding tape, and can also realize the stacking of the string welding unit, thereby conveniently preparing a battery string.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic equipment, and in particular to a welding ribbon feeding device and a battery string preparation device. 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 tape 2' is laid on the battery cell 1', and the second end of the welding tape 2' falls behind the battery cell 1'; then, a battery cell 1" is laid out, and the battery cell 1" is covered on the second end of the laid welding tape 2', and then the welding tape 2" is laid on the battery cell 1", and similarly, the second end of the welding tape 2" falls behind the battery cell 1"; then, a battery cell 1"' is laid on the second end of the welding tape 2", and a welding tape 2"' is laid on the battery cell 1"'... In this way, one battery cell and one welding tape are laid out one by one to finally form a battery string. In addition, in traditional equipment, welding tapes are usually prepared one by one for ready use.

[0003] The method for preparing such battery strings is inefficient. Summary of the invention

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

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a welding tape feeding device for preparing multiple groups of welding tapes, which includes: a welding tape unwinding mechanism for releasing welding tape material; multiple groups of welding tape cutting mechanisms, which are arranged in a straight line and at intervals downstream of the welding tape unwinding mechanism, and can cut the welding tape material; a welding tape traction mechanism, which can pull out the welding tape material from the welding tape unwinding mechanism and can pull the welding tape material through the welding tape cutting mechanism in a straight line; a welding tape lifting mechanism, which is connected to the welding tape cutting mechanism and can drive the welding tape cutting mechanism to move in a vertical direction; wherein any welding tape The cutting mechanisms can all move in the vertical direction under the drive of the solder strip lifting mechanism; or, a group of solder strip cutting mechanisms that the solder strip material strip passes through first are relatively fixedly arranged in the vertical direction; before the solder strip traction mechanism tractions the solder strip material strip, the solder strip lifting mechanism can drive the solder strip cutting mechanism away from the traction path of the solder strip traction mechanism, thereby avoiding the solder strip cutting mechanism interfering with the action of the solder strip traction mechanism; after the solder strip traction mechanism tractions the solder strip material strip through the solder strip cutting mechanism, the solder strip lifting mechanism can drive the solder strip cutting mechanism close to the solder strip material strip to facilitate the operation of the solder strip cutting mechanism; the straight line direction is the arrangement direction of multiple groups of solder strip cutting mechanisms.

[0006] Furthermore, the solder strip unwinding mechanism can release multiple solder strips at the same time, and the multiple solder strips are arranged at intervals along the second direction; the second direction is perpendicular to the straight line direction in the horizontal plane; the solder strip cutting mechanism includes: a first cutting die, on which a plurality of blades arranged at intervals along the 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, which can drive the first cutting die and the second cutting die to move relative to each other along the second direction; wherein the blades on the first cutting die correspond to the blades on the second cutting die one by one; the solder strip passes between the corresponding two blades; the first cutting die and the second cutting die move toward each other, and can cut multiple solder strips at the same time.

[0007] Furthermore, the solder tape traction mechanism includes: a pre-traction component, used to pull out the solder tape material from the solder tape unwinding mechanism; a tape traction component, used to pull out the cut solder tape from the solder tape cutting mechanism; the solder tape material released by the solder tape unwinding mechanism is pulled through the solder tape cutting mechanism via the pre-traction component; after pulling out the solder tape material of a preset length, the pre-traction component can return to the solder tape unwinding mechanism to prepare for the next traction; and the solder tape cut by the solder tape cutting mechanism is pulled downstream via the tape traction component.

[0008] Furthermore, the solder strip feeding device also includes multiple sets of solder strip bending mechanisms, which are arranged downstream of the solder strip unwinding mechanism; the multiple sets of solder strip bending mechanisms are arranged at intervals along a straight line direction; the solder strip traction mechanism can pull the solder strip material through each solder strip bending mechanism in turn; the solder strip material passing through the solder strip bending mechanism can be folded into multiple bends.

[0009] Furthermore, the solder strip feeding device also includes a front pressing assembly, which is arranged downstream of the solder strip bending mechanism and can press the solder strip material passing through the solder strip bending mechanism; a rear pressing assembly, which is arranged upstream of the solder strip bending mechanism and can press the solder strip material entering the solder strip bending mechanism; a belt pressing moving assembly, which is connected to the front pressing assembly and / or the rear pressing assembly and can drive the front pressing assembly and / or the rear pressing assembly to move in a straight line direction; wherein the front pressing assembly and the rear pressing assembly can press the solder strip material protruding from the solder strip bending mechanism; subsequently, the belt pressing moving assembly drives the front pressing assembly to move downstream, and / or the belt pressing moving assembly drives the rear pressing assembly to move upstream, thereby tightening the solder strip material pressed by the front pressing assembly and the rear pressing assembly.

[0010] Furthermore, the solder strip feeding device also includes multiple groups of solder strip guiding mechanisms, which are arranged in a straight line direction; the solder strip guiding mechanisms correspond to the solder strip cutting mechanisms one by one, and any solder strip guiding mechanism is arranged downstream of the corresponding solder strip cutting mechanism; the solder strip guiding mechanism includes a guide plate, and a guide groove extending in a straight line direction is provided on the guide plate, and the guide groove can receive the solder strip material and limit the position of the solder strip material.

[0011] Furthermore, any solder strip guiding mechanism also includes: a front clamp, arranged at the front end of the guide plate, capable of clamping the solder strip material at the front end of the guide groove; a rear clamp, arranged at the rear end of the guide plate, capable of clamping the solder strip material at the rear end of the guide groove.

[0012] Furthermore, the solder strip feeding device also includes a guide lifting mechanism, which is connected to the solder strip guiding mechanism and can drive the solder strip guiding mechanism to move in a vertical direction.

[0013] Furthermore, the solder strip feeding device also includes a guide translation assembly, which is connected to the solder strip guide mechanism and can drive the solder strip guide mechanism to move in a straight line direction to adjust the spacing between two adjacent solder strip guide mechanisms; wherein, any solder strip guide mechanism can move in a straight line direction driven by the guide translation assembly; or, a group of solder strip guide mechanisms that the solder strip material strip passes through first are relatively fixed in the straight line direction.

[0014] The present application also provides a battery string preparation device, which includes the above-mentioned solder strip feeding device, and also includes: a battery cell feeding device for supplying battery cells; a stacking device, which is arranged downstream of the battery cell feeding device and the solder strip feeding device, and can receive the battery cells supplied by the battery cell feeding device and the solder strips supplied by the solder strip feeding device; on the stacking device, the battery cell solder strips are laid together to form a string welding unit; in any string welding unit, the first end of the solder strip (2) is on the battery cell, and the second end protrudes from the battery cell.

[0015] The present application provides a solder tape feeding device, which can simultaneously prepare multiple groups of solder tapes, and includes a solder tape unwinding mechanism, a solder tape cutting mechanism and a solder tape traction mechanism; wherein, multiple groups of solder tape cutting mechanisms are arranged at intervals along a straight line direction; the solder tape material strip released by the solder tape unwinding mechanism is pulled by the solder tape traction mechanism and passes through each solder tape cutting mechanism in sequence; after pulling out the material strip of a preset length, the solder tape cutting mechanism cuts the material strip at the corresponding position, and can cut the passed material strip into multiple sections, thereby obtaining multiple groups of solder tapes; thus, the solder tape feeding device can supply multiple groups of material strips at a time, so as to prepare multiple string welding units at the same time and speed up the preparation efficiency of battery strings.

[0016] Furthermore, in order to prevent the weld ribbon cutting mechanism from interfering with the movement of the weld ribbon traction mechanism, the weld ribbon feeding device also includes a weld ribbon lifting mechanism; in the non-cutting state, the weld ribbon cutting mechanism is not higher than the traction path of the material strip, so that the weld ribbon traction mechanism can extract the material strip from the weld ribbon unwinding mechanism and pull the weld ribbon material strip to move downstream; after the material strip passes through the weld ribbon cutting mechanism, the weld ribbon lifting mechanism drives the weld ribbon cutting mechanism to rise, so that the weld ribbon cutting mechanism can act on the material strip.

[0017] The present application also provides a battery string preparation device, including the above-mentioned solder strip feeding device, and also including a battery cell feeding device and a stacking device; the stacking device can receive the battery cells supplied by the battery cell feeding device and the solder strips supplied by the solder strip feeding device; on the stacking device, the preparation of the string welding unit can be completed; further, the stacking device can also realize the stacking of the string welding units, thereby conveniently preparing the battery string. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 It is a schematic diagram of a construction method of a battery string in the prior art;

[0020] Figure 2 It is a schematic diagram of two stacked series welding units provided by the present application;

[0021] Figure 3 It is another schematic diagram of two stacked series welding units provided by the present application;

[0022] Figure 4 It is another schematic diagram of two stacked series welding units provided by the present application;

[0023] Figure 5 yes Figure 4 Schematic diagram of the battery string structure consisting of a series of welded unit stacks;

[0024] Figure 6 yes Figure 5 A schematic diagram of the top view of the battery string;

[0025] Figure 7 There is also a schematic diagram of two stacked series welding units;

[0026] Figure 8 yes Figure 7 Schematic diagram of the battery string structure consisting of a series of welded unit stacks;

[0027] Fig. 9 It is a structural schematic diagram of a battery string preparation device provided in the present application;

[0028] Fig.10 yes Fig. 9 A schematic diagram of the side structure of the battery cell handling mechanism;

[0029] Fig.11 It is a structural schematic diagram of a welding strip feeding device provided by the present application;

[0030] Fig.12 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;

[0031] Fig.13 yes Fig.12 A schematic diagram of the side structure of the middle welding strip cutting mechanism;

[0032] Fig.14 yes Fig.13 A schematic diagram of a top view of the structure of the first cutting die and the second cutting die in one state;

[0033] Fig.15 yes Fig.13 A schematic diagram of a top view of the structure of the first cutting die and the second cutting die in another state;

[0034] Fig.16 yes Fig. 9 A schematic diagram of the structure of the middle lamination device;

[0035] Fig.17 yes Fig.16 The side view structural diagram of the middle lamination device omits the lamination conveying mechanism and the base. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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 .

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 .

[0048] 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.

[0049] 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.

[0050] 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 8The 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.

[0051] The present application provides a battery string preparation device, referring to Fig. 9 , 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.

[0052] The lamination device 300 includes a lamination table 310 for receiving the battery cells 1 and the welding strips 2 to form a series welding unit 10 .

[0053] 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.

[0054] The stacking device 300 also includes a stacking drive mechanism, which can carry the string welding unit 10 on the stacking platform 310 and stack the string welding unit 10. The stacking device 300 also includes a stacking drive mechanism; the stacking drive mechanism includes: a stacking lifting mechanism 320, which is connected to the stacking platform 310 and can drive the stacking platform 310 to move in a vertical direction; a stacking translation mechanism 330, which is connected to the stacking platform 310 and can drive the stacking platform 310 to move in a linear direction. At this time, the linear direction is the arrangement direction of multiple stacking platforms 310.

[0055] Reference Fig. 9 , Fig.16 and Fig.17By 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.

[0056] 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.16 and Fig.17 , 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.

[0057] 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.

[0058] The battery cell loading device 100 is used to provide battery cells 1 to form a string welding unit 10. The battery cell loading device 100 can carry the battery cells 1 to the stacking device 300 one by one.

[0059] 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.

[0060] Alternatively, the battery cell loading device 100 can simultaneously carry multiple battery cells 1 to each stacking platform 310. Fig. 9 and Fig.10 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.

[0061] 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.

[0062] Furthermore, the cell loading device 100 further includes a detection member 123, the working end of which is facing the cell conveying mechanism 110, and can detect the state of the cell 1 on the cell conveying mechanism 110, so that the cell transporting driving member 122 drives the cell extracting member 121 to accurately extract and transfer the cell 1. The detection member 123 can obtain the position of the cell 1, so that the cell transporting driving member 122 drives the cell extracting member 121 to extract the cell 1.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] The solder strip feeding device 200 is used to provide the solder strip 2 .

[0068] Two usages of the solder ribbon feeding device 200 are described below:

[0069] Example 1.

[0070] 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 .

[0071] 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 .

[0072] 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.

[0073] 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.

[0074] Example 2.

[0075] 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 .

[0076] 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.

[0077] Reference Fig.11 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.

[0078] 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).

[0079] 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.

[0080] 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").

[0081] The following introduces two methods of simultaneously preparing multiple groups of solder strips 2 using the solder strip feeding device 200:

[0082] Example 3.

[0083] The battery string preparation device is provided with a plurality of groups of solder strip feeding devices 200 described in Embodiment 2, each of which is used to prepare a group of solder strips 2.

[0084] Alternatively, the battery string preparation device is provided with only one set of the solder strip feeding device 200 described in Embodiment 2, and multiple sets of solder strips 2 are prepared one by one through the solder strip feeding device 200.

[0085] Example 4.

[0086] The battery string preparation device is only provided with a set of the solder strip feeding device 200 described in Example 2, 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 a plurality of solder strip cutting mechanisms 220; the plurality of solder strip cutting mechanisms 220 are arranged in a straight line and at intervals downstream of the solder strip unwinding mechanism 210.

[0087] Reference Fig.11 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] The welding strip lifting mechanism 260 may adopt driving components such as electric cylinders and linear modules.

[0092] 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. 9 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.

[0093] 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.

[0094] 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 .

[0095] Two methods of conveying the welding ribbon 2 are described in detail below. For ease of understanding, in the following embodiments, the welding ribbon 2 is conveyed to a plurality of lamination stages 310 arranged in a straight line and laid together with the battery cells 1:

[0096] Example 5.

[0097] 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 .

[0098] Among them, the solder strip conveying mechanism may 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 1, which will not be repeated here.

[0099] Example 6.

[0100] 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 .

[0101] 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.

[0102] 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 .

[0103] 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 .

[0104] In this embodiment, the welding strip traction mechanism 230 may include only one set of traction mechanisms. Fig.11 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.

[0105] In order to speed up the handling efficiency of the finished product welding strip 2, refer to Fig.12 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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:

[0113] Example 7.

[0114] 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.

[0115] Example 8.

[0116] 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.

[0117] Specific reference Figures 13 to 15 , 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.

[0118] 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 .

[0119] 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.

[0120] 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.

[0121] 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.

[0122] Among them, refer to Fig.11 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] For example, refer to Fig.11 , 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] Reference Fig.11 and Fig.12 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] Reference Fig.11 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.

[0143] The guide lifting mechanism 270 may adopt driving components such as electric cylinders and linear modules.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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 .

[0148] 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.

[0149] The guide translation assembly 280 may be driven by an electric cylinder or a linear module.

[0150] Among them, refer to Fig.12 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.

[0151] 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.

[0152] 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 three processes: battery cell loading, welding ribbon loading and stacking; wherein, the battery cell loading process is as follows:

[0153] The cell conveying mechanism 110 conveys four cells 1 to corresponding stations of the cell handling mechanism 120;

[0154] 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;

[0155] 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;

[0156] 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;

[0157] Finally, four battery cells 1 are released onto the corresponding lamination platforms 310 .

[0158] The process of soldering ribbon feeding is as follows:

[0159] The solder strip unwinding mechanism 210 releases a group of solder strips at the same time;

[0160] 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;

[0161] 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;

[0162] 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;

[0163] 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;

[0164] The welding strip bending mechanism 240 acts on the material strip to form four spaced bends on the material strip;

[0165] 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;

[0166] The solder strip cutting mechanism 220 simultaneously cuts the material strips at the corresponding positions, cutting off four solder strips 2;

[0167] The solder strip lifting mechanism 260 drives the solder strip cutting mechanism 220 to descend to expose the free end of the material strip;

[0168] 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;

[0169] 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 .

[0170] The lamination process is as follows:

[0171] The stacking device 300 includes four stacking stages 310. In one working cycle, any stacking stage 310 can sequentially receive a battery cell 1 and a group of welding ribbons 2. The welding ribbons 2 are laid on the battery cell 1 to form a series welding unit 10.

[0172] The stacking lifting mechanism 320 drives the corresponding stacking platform 310 to rise, so that the four stacking platforms 310 are stacked from left to right (refer to Fig.17 ), height decreasing;

[0173] 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;

[0174] 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;

[0175] 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.

[0176] A sufficient number of string-welded units 10 are stacked together to eventually form a battery string 20 .

[0177] 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.11 At this time, the pulling direction of the material strip, the conveying direction of the battery cell 1, and the stacking direction of the string welding unit 10 are all left and right. Through such a same-direction setting, the construction and stacking 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 welding strip feeding device (200) for preparing a plurality of welding strips (2), characterized in that: include: A soldering ribbon unwinding mechanism (210), used for releasing the soldering ribbon material; A plurality of groups of welding strip cutting mechanisms (220), wherein the plurality of groups of welding strip cutting mechanisms (220) are arranged in a straight line and at intervals downstream of the welding strip unwinding mechanism (210), and are capable of cutting welding strip material strips; The solder strip pulling mechanism (230) is capable of pulling out the solder strip material strip from the solder strip unwinding mechanism (210), and is capable of pulling the solder strip material strip through the solder strip cutting mechanism (220) in a straight line direction; the solder strip pulling mechanism (230) comprises: A pre-pulling assembly (231) is used to pull out the soldering tape material strip from the soldering tape unwinding mechanism (210); A ribbon pulling assembly (232) used for pulling out the cut welding ribbon (2) from the welding ribbon cutting mechanism (220); The solder tape material strip released by the solder tape unwinding mechanism (210) is pulled through the solder tape cutting mechanism (220) via the pre-pulling component (231); after pulling out the solder tape material strip of a preset length, the pre-pulling component (231) can return to the solder tape unwinding mechanism (210) to prepare for the next traction; and the solder tape (2) cut by the solder tape cutting mechanism (220) is pulled downstream via the tape traction component (232); A welding strip lifting mechanism (260) connected to the welding strip cutting mechanism (220) and capable of driving the welding strip cutting mechanism (220) to move in a vertical direction; Wherein, any of the solder strip cutting mechanisms (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 fixedly arranged in the vertical direction; Before the solder tape traction mechanism (230) tractions the solder tape material strip, the solder tape lifting mechanism (260) can drive the solder tape cutting mechanism (220) away from the traction path of the solder tape traction mechanism (230), thereby preventing the solder tape cutting mechanism (220) from interfering with the action of the solder tape traction mechanism (230); After the solder strip pulling mechanism (230) pulls the solder strip material strip through the solder strip cutting mechanism (220), the solder strip lifting mechanism (260) can drive the solder strip cutting mechanism (220) to approach the solder strip material strip, so as to facilitate the operation of the solder strip cutting mechanism (220); The straight line direction is the arrangement direction of the multiple groups of the welding strip cutting mechanisms (220); A plurality of welding strip bending mechanisms (240) are arranged downstream of the welding strip unwinding mechanism (210); A plurality of groups of the solder strip bending mechanisms (240) are arranged at intervals along the straight line direction; the solder strip pulling mechanism (230) can pull the solder strip material strip through each of the solder strip bending mechanisms (240) in sequence; and the solder strip material strip passing through the solder strip bending mechanism (240) can be folded into multiple bends.

2. The solder strip feeding device (200) according to claim 1, characterized in that: The solder strip unwinding mechanism (210) is capable of releasing a plurality of solder strips at the same time, and the plurality of solder strips are arranged at intervals along a second direction; the second direction is perpendicular to the straight line direction in a horizontal plane; The welding strip cutting mechanism (220) comprises: A first cutting die (221), wherein the first cutting die (221) is provided with a plurality of blades arranged at intervals along the second direction; A second cutting die (222), wherein the second cutting die (222) is provided with a plurality of blades spaced apart along the second direction; A cutting drive component (223) capable of driving the first cutting die (221) and the second cutting die (222) to move relative to each other along the second direction; The blade on the first cutting die (221) corresponds to the blade on the second cutting die (222) one by one; the solder strip passes between the two corresponding blades; the first cutting die (221) and the second cutting die (222) move towards each other and can cut multiple solder strips at the same time.

3. The solder strip feeding device (200) according to claim 1, characterized in that: Also includes: A front pressing component (291), arranged downstream of the solder strip bending mechanism (240), capable of pressing the solder strip material strip passing through the solder strip bending mechanism (240); A rear pressure component (292), arranged upstream of the solder strip bending mechanism (240), capable of pressing the solder strip material entering the solder strip bending mechanism (240); A pressure belt moving assembly (293), connected to the front pressure assembly (291) and / or the rear pressure assembly (292), and capable of driving the front pressure assembly (291) and / or the rear pressure assembly (292) to move along the straight line direction; Wherein, the front pressure component (291) and the rear pressure component (292) are capable of pressing the solder strip material protruding from the solder strip bending mechanism (240); then, the press strip moving component (293) drives the front pressure component (291) to move downstream, and / or, the press strip moving component (293) drives the rear pressure component (292) to move upstream, thereby tightening the solder strip material pressed by the front pressure component (291) and the rear pressure component (292).

4. The solder strip feeding device (200) according to claim 1, characterized in that: It also includes a plurality of groups of welding strip guiding mechanisms (250), wherein the plurality of groups of welding strip guiding mechanisms (250) are arranged along the straight line direction; The welding strip guiding mechanism (250) corresponds to the welding strip cutting mechanism (220) one by one, and any welding strip guiding mechanism (250) is arranged downstream of the corresponding welding strip cutting mechanism (220); The solder strip guiding mechanism (250) comprises a guiding plate (251), on which a guiding groove extending along the straight line direction is provided, and the guiding groove can receive the solder strip material and limit the position of the solder strip material.

5. The solder strip feeding device (200) according to claim 4, characterized in that: Any of the welding strip guiding mechanisms (250) further comprises: A front clamp (252) is disposed at the front end of the guide plate (251) and is capable of clamping the welding strip at the front end of the guide groove; The rear clamp (253) is arranged at the rear end of the guide plate (251) and is capable of clamping the soldering strip at the rear end of the guide groove.

6. The welding strip feeding device (200) according to claim 4 or 5, characterized in that: It also includes a guide lifting mechanism (270) which is connected to the welding strip guide mechanism (250) and can drive the welding strip guide mechanism (250) to move in a vertical direction.

7. The welding strip feeding device (200) according to claim 4 or 5, characterized in that: It also includes a guide translation assembly (280) connected to the welding strip guide mechanism (250) and capable of driving the welding strip guide mechanism (250) to move along the straight line direction so as to adjust the distance between two adjacent welding strip guide mechanisms (250); Wherein, any one of the solder strip guiding mechanisms (250) can move along the straight line direction under the drive of the guiding translation component (280); or, a group of solder strip guiding mechanisms (250) that the solder strip material strip passes through first is relatively fixedly arranged along the straight line direction.

8. A battery string preparation device, characterized in that: The welding strip feeding device (200) comprises the welding strip feeding device (200) according to any one of claims 1 to 7, further comprising: A battery cell feeding device (100) for feeding battery cells (1); A 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); On the stacking device (300), the battery cells (1) and the welding strips (2) are laid together to form a series welding unit (10); in any of the series welding units (10), the first end (2a) of the welding strip (2) is located on the battery cell (1), while the second end (2b) protrudes from the battery cell (1).

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