Back contact battery film covering cloth string device

Abstract

The utility model discloses a back contact battery film covering cloth string device, and relates to the technical field of battery assembly production. The tool supply mechanism is used for providing a positioning tool; the membrane supply mechanism is used for preparing membranes; the welding strip transferring mechanism comprises a first strip conveying mechanism and a second strip conveying mechanism, the first strip conveying mechanism and the second strip conveying mechanism are used for laying a first set of welding strip sections and a second set of welding strip sections which are arranged in a staggered mode on the surfaces of battery pieces on the front end string arrangement station of the string arrangement table respectively, and the transferring mechanism is used for transferring the positioning station and membranes. The membrane is laid on the tops of the first group of welding strip sections and the second group of welding strip sections on the battery piece, and the positioning tool is laid on the upper portion of the membrane. The battery piece, the welding strip, the adhesive film and the positioning tool for positioning the adhesive film and the welding strip can be continuously laid on the string arrangement station, meanwhile, the welding strip and the adhesive film laid on the battery piece are positioned, the string arrangement step is simple, and the battery string arrangement efficiency and the series connection quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery assembly production, in particular to a back contact battery coating string device. Background Art

[0002] A battery string composed of back-contact batteries connected in series, with segmented welding strips staggeredly connected to the back of the battery cells, reducing the shading area of ​​the front of the battery cells and improving the light conversion efficiency of the battery cells.

[0003] With the improvement of the power generation efficiency of battery modules, the diameter of the welding ribbon is getting thinner and thinner, and the battery cells are getting thinner and thinner. The new battery cell series connection technology uses adhesive film to bond the welding ribbon to the surface of the battery cell, replacing the conventional high-temperature welding process of connecting the welding ribbon and the battery cell metal. In the existing technical solutions, the equipment for the battery string that bonds the back contact battery cell and the welding ribbon with an adhesive film adopts a layout scheme in which multiple groups of battery cells, multiple groups of welding ribbons and multiple adhesive films are stacked in a string. The layout scheme corresponds to the need to prepare and grab multiple groups of battery cells, multiple groups of welding ribbons and multiple adhesive films at one time. The matching mechanical structure and process are extremely complex, and the structural maintenance cost is high. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a back-contact battery coating string device, which not only has a simple operating mechanism but also can improve the laying efficiency of the battery string.

[0005] The present application proposes a back contact battery coating string device, comprising:

[0006] The stringing table is used to receive and transport the battery cells, welding ribbon segments and membrane sheets for laying the battery strings to the rear end;

[0007] A tool supply mechanism, disposed on one side of the string arrangement platform, for providing a positioning tool for pressing against the surface of the battery string;

[0008] A film supply mechanism, used to prepare a film sheet matching a single cell;

[0009] The welding tape transfer mechanism comprises a first conveying tape mechanism and a second conveying tape mechanism movably arranged above the stringing table, wherein the first conveying tape mechanism is used to lay a first group of welding tape segments on the surface of the battery cell on the stringing station at the front end of the stringing table, and the second conveying tape mechanism is used to lay a second group of welding tape segments on the surface of the battery cell on the stringing station at the front end of the stringing table, and the first group of welding tape segments and the second group of welding tape segments are alternately arranged on the surface of the battery cell;

[0010] The transfer mechanism is movably arranged above the stringing table, and is used to transfer the positioning tool and the membrane, and lay the membrane on the top of the first group of welding strip segments and the second group of welding strip segments on the battery cell, and press the positioning tool against the upper part of the membrane.

[0011] Preferably, the transfer mechanism includes a first grabbing assembly and a second grabbing assembly arranged at intervals, the first grabbing assembly is used to grab the positioning tooling, and the second grabbing assembly is used to grab the diaphragm, the diaphragm is adsorbed and positioned under the positioning tooling by the second grabbing assembly, and is synchronously moved to the top of the first group of welding tape segments and the second group of welding tape segments of the stringing station together with the positioning tooling.

[0012] Preferably, the positioning tool includes a first crimping part and a second crimping part, the second crimping part can move vertically relative to the first crimping part, and the first crimping part and / or the second crimping part are provided with a through hole for the suction claw of the second grabbing assembly to pass through.

[0013] Preferably, the pressing surface of the second crimping part in the positioning tool placed on the cloth string station is higher than the pressing surface of the first crimping part, and the pressing surface of the second crimping part in the positioning tool placed at the rear end of the cloth string station is flush with the pressing surface of the first crimping part.

[0014] Preferably, along the conveying direction of the stringing table, a second belt fixing mechanism and a first belt fixing mechanism are sequentially provided on the front end of the stringing table, the first belt fixing mechanism is used to fix the tail end of the first group of welding belt segments located on the stringing station, and the second belt fixing mechanism is used to fix the tail end of the second group of welding belt segments extending out of the stringing station.

[0015] Preferably, the first strap fixing mechanism and the second strap fixing mechanism each include a plurality of groups of clamps for clamping the welding strap segments opposite to each other, with the closed openings of the clamps facing upward, and the number of the closed openings on each of the first strap fixing mechanism and the second strap fixing mechanism is the total number of welding strap segments of the first group of welding strap segments and the second group of welding strap segments on a single battery cell.

[0016] Preferably, a battery cell cache position is also provided at the front end of the stringing table, and the battery cell cache position is arranged on the front side of the first fixing belt mechanism or the second fixing belt mechanism, and is used to pre-arrange the battery cells before the stringing station, and the stringing table advances one battery cell from the battery cell cache position to the stringing station each time.

[0017] Preferably, the battery cell cache position is arranged to extend horizontally or downwardly by a distance of at least a battery cell width.

[0018] Preferably, the solder ribbon transfer mechanism also includes a solder ribbon supply mechanism and a solder ribbon cutting mechanism arranged at the front end or one side of the stringing table, and the solder ribbon cutting mechanism is used to cut the continuous long solder ribbon provided by the solder ribbon supply mechanism into solder ribbon segments connecting two adjacent battery cells.

[0019] Preferably, the film supply mechanism and the tool supply mechanism are arranged in the same line, and the discharge end of the film supply mechanism is adjacent to or overlaps with the discharge end of the tool supply mechanism, and the transfer mechanism grabs the film sheet and the positioning tool from the film supply mechanism and the tool supply mechanism.

[0020] The technical solution provided by the utility model can complete the stacking of battery cells, welding strip segments, membranes and positioning tools for positioning membranes at the same station on the stringing table, adopt the method of continuous laying and series connection of single battery cells, and cooperate with the stringing table to continuously transport the battery cells, welding strip segments, membranes and positioning tools that have been stacked in a single time backward at the stringing station. Two groups of alternating first belt conveyor mechanisms and second belt conveyor mechanisms respectively cooperate to complete the two groups of staggered welding strip segments on the battery cells at the stacking station. Not only is the structure simple, but also the laying efficiency of the battery string can be improved. At the same time, the welding strip segments and adhesive films on the surface of the battery cells can be positioned at one time at the same station, and there is no need to move the welding strip segments a second time, which improves the quality of the welding strip segments in series of the battery string. On the other hand, the battery string after continuous series connection can also be cut according to the required length of the battery string, which is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a top view schematic diagram of a back contact battery coating cloth string device proposed by the utility model;

[0023] Figure 2 It is a front view schematic diagram of a back contact battery film coating string device proposed by the utility model;

[0024] Figure 3 A schematic diagram of the stringing steps of the back contact battery coating stringing device proposed in the utility model;

[0025] Figure 4 It is a structural schematic diagram of the transfer mechanism in the utility model;

[0026] Figure 5It is a top view schematic diagram of another back contact battery coating string device in the present invention.

[0027] Wherein, the accompanying drawings are marked as follows:

[0028] 1. Battery cell; 2. Welding strip section; 3. Diaphragm; 4. Positioning tool; 41. First crimping part;

[0029] 42. Second crimping part; 10. Fabric stringing station; 20. Tool supply mechanism; 30. Film supply mechanism; 40. First belt conveyor mechanism; 50. Second belt conveyor mechanism; 60. Transfer mechanism; 61. First grabbing assembly; 62. Second grabbing assembly; 70. First belt fixing mechanism; 80. Second belt fixing mechanism; 91. Welding ribbon supply mechanism; 92. Welding ribbon cutting mechanism; A. Fabric stringing station; B. Battery cell cache position. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] A battery string formed by back-contact batteries connected in series, wherein the welding strip segments 2 are staggered to connect the back sides of two adjacent battery cells 1, and the back sides of the battery cells 1 are distributed with staggered positive and negative electrode areas, and the back sides of the battery cells 1 are located on the same side of the battery string.

[0033] like Figures 1 to 3 As shown, the utility model provides a back contact battery film coating stringing device, comprising: a stringing table 10, used to receive and convey to the rear end the battery sheet 1 welding strip section 2 and the membrane sheet 3 for laying the battery string;

[0034] A tool supply mechanism 20 is provided on one side of the stringing platform 10 and is used to provide a positioning tool 4 that presses against the surface of the battery string;

[0035] A film supply mechanism 30, used for preparing a film 3 matching a single cell 1;

[0036] The welding tape transfer mechanism includes a first conveying tape mechanism 40 and a second conveying tape mechanism 50 which are movably arranged above the stringing table 10. The first conveying tape mechanism 40 is used to lay a first group of welding tape segments on the surface of the battery cell 1 on the front end stringing station A of the stringing table 10. The second conveying tape mechanism 50 is used to lay a second group of welding tape segments on the surface of the battery cell 1 on the front end stringing station A of the stringing table 10. The first group of welding tape segments and the second group of welding tape segments are alternately arranged on the surface of the battery cell 1.

[0037] The transfer mechanism 60 is movably arranged above the stringing table 10, and is used to transfer the positioning station and the membrane 3, and lay the membrane 3 on the top of the first group of welding strip segments and the second group of welding strip segments on the battery cell 1, and lay the positioning tooling 4 on the upper part of the membrane 3.

[0038] In the present application, the battery cell 1, two groups of staggered welding ribbon segments 2, the diaphragm 3 and the positioning tool 4 for positioning and pressing the welding ribbon segments 2 and the diaphragm 3 on the battery cell 1 can be jointly laid out on the same string-laying station A. The battery cell 1 is placed on the bottom layer with the back of the battery cell 1 facing upward, and the rear end of the first group of welding ribbon segments and the front end of the second group of welding ribbon segments are staggered and placed on the upper part of the battery cell 1 at the string-laying station A, the diaphragm 3 and the positioning tool 4 are placed on the rear end of the first group of welding ribbon segments and the front end of the second group of welding ribbon segments, and the diaphragm 3 contacts the top of the first group of welding ribbon segments and the second group of welding ribbon segments with the surface of the battery cell 1 between the welding ribbon segments 2.

[0039] The present application realizes the laying of materials in a battery string at a work station of a battery cell 1 (i.e., the string laying work station A), as well as the positioning of the membrane 3 and the welding tape segment 2 at the same time, wherein the front end of the first group of welding tape segments extends out of the first side of the surface of the battery cell 1, and the rear end of the second group of welding tape segments extends out of the second side of the surface of the battery cell 1. The battery string is laid continuously in this string laying method, and after the string laying station 10 transports a battery cell 1 to the rear, the front end of the string laying station 10 continues to lay the second battery cell 1, and the second battery cell 1 is located at the front end of the first battery cell 1, close to the feeding end of the string laying station 10, so that the second group of welding tape segments on the first battery cell 1 is placed on the upper part of the second battery cell 1, and the third group of welding tape segments staggered with the second group of welding tape segments continue to be laid on the second battery cell 1, thereby continuously completing the laying of the battery string.

[0040] It should be noted that in the present application, the first group of welding ribbon segments and the second group of welding ribbon segments located on different battery cells 1 may be used interchangeably, that is, when the rear end of the battery cell 1 also needs to connect battery cells 1 in series, the rear end of the second group of welding ribbon segments on the battery cell 1 extends out of the battery cell 1 and is laid on the surface of the next adjacent battery cell 1, corresponding to the first group of welding ribbon segments on the next battery cell 1, and then the front end of the third group of welding ribbon segments continues to be laid on the next battery cell 1 and is arranged alternately with the rear end of the second group of welding ribbon segments.

[0041] Compared with the existing solutions, the tooling supply mechanism 20, the film supply mechanism 30, the welding strip moving mechanism and the transfer mechanism 60 in the present application can cooperate with the stringing table 10 to uninterruptedly complete the laying of the battery strings of the back-contact batteries at the front end of the stringing table 10. The laying structure and steps are simple, and the efficiency of connecting the back-contact batteries in series into battery strings is improved.

[0042] In some embodiments, Figure 4 As shown, the transfer mechanism 60 includes a first grabbing component 61 and a second grabbing component 62 which are arranged at intervals. The first grabbing component 61 is used to grab the positioning tool 4, and the second grabbing component 62 is used to grab the diaphragm 3. The diaphragm 3 is adsorbed and positioned under the positioning tool 4 by the second grabbing component 62, and is synchronously transferred with the positioning tool 4 to the top of the first group of welding tape segments and the second group of welding tape segments of the stringing station A, so that the diaphragm 3 is in contact with the welding tape segment 2 and the battery cell 1. While the positioning tool 4 and the diaphragm 3 are laid, the diaphragm 3 and the welding tape segment 2 are positioned on the battery cell 1. After heating, the diaphragm 3 is bonded to the battery cell 1 and the welding tape segment 2, and the welding tape segment 2 is fixed to the surface of the battery cell 1, so as to realize the series connection of the welding tape segment 2 and the battery cell 1.

[0043] Optionally, the first grabbing component 61 and the second grabbing component 62 arranged at intervals include at least the following solutions:

[0044] The first type is that the first grabbing assembly 61 is arranged in the middle of the second grabbing assembly 62, and the second grabbing assembly 62 grabs the diaphragm 3 located on both sides of the width of the positioning tool 4;

[0045] The second type is that the first grabbing assembly 61 and the second grabbing assembly 62 are arranged linearly in the length direction of the positioning tool 4, so that the position of grabbing the positioning tool 4 and the position of grabbing the diaphragm 3 are on the same line in the length direction thereof, and the first grabbing assembly 61 and the second grabbing assembly 62 grab the positioning tool 4 and the diaphragm 3 at intervals in the length direction of the positioning tool 4;

[0046] The third type is that the second grabbing component 62 is arranged in the middle of the first grabbing component 61, so that the second grabbing component 62 grabs the middle of the membrane 3;

[0047] Therefore, the present application does not specifically limit the relative position between the first grabbing assembly 61 and the second grabbing assembly 62 , as long as the positioning tool 4 and the diaphragm 3 can be grabbed at the same time.

[0048] Optional, see Figure 2 , Figure 4 As shown, the positioning tool 4 includes a first crimping part 41 and a second crimping part 42. The second crimping part 42 can move vertically relative to the first crimping part 41. The first crimping part 41 and / or the second crimping part 42 are provided with a through hole for the suction claw of the second grabbing assembly 62 to pass through.

[0049] Optionally, the pressing surface of the second crimping part 42 in the positioning tool 4 placed on the string-laying station A is higher than the pressing surface of the first crimping part 41, the pressing surface of the second crimping part 42 in the positioning tool 4 placed at the rear end of the string-laying station A is flush with the pressing surface of the first crimping part 41, the rear end of the string-laying station A is adjacent to a battery cell station of the string-laying station A, and the string-laying table 10 is transported backward from the string-laying station A to the station at the rear end of the string-laying station A.

[0050] Among them, the size of the positioning tool 4 matches the size of the diaphragm 3 and the battery cell 1, so as to match the larger contact area between the diaphragm 3 and the welding strip segment 2, so that the positioning tool 4 has a higher crimping accuracy on the diaphragm 3 and the welding strip segment 2. Therefore, the through holes on the first press part and / or the second crimping part 42 on the positioning tool 4 are used for the second grabbing component 62 to extend out of the bottom surface of the positioning tool 4 to adsorb the diaphragm 3, and the diaphragm 3 placed on the second crimping part 42 is lifted when the second crimping part 42 is placed on the string laying station A, so as to avoid the first belt conveyor mechanism 40 or the second belt conveyor mechanism 50 placed on the upper surface of the battery cell 1. When the positioning tool 4 and the diaphragm 3 are placed on the top of the welding strip segment 2, the end of the welding strip segment 2 controlled by the first belt conveyor mechanism 40 or the second belt conveyor mechanism 50 can be released to prevent the welding strip segment 2 laid on the surface of the battery cell 1 from shifting, thereby controlling the series connection quality of the battery string.

[0051] When the first belt conveyor mechanism 40 or the second belt conveyor mechanism 50 releases the welding tape segment 2, the positioning tool 4 and the diaphragm 3, welding tape segment 2 and battery cell 1 laid under the positioning tool 4 are synchronously transported backward by one battery cell 1 station, and the second crimping part 42 of the positioning tool 4 when transported to the next battery cell 1 station is controlled to be flush with the pressing surface of the first crimping part 41, so that the diaphragm 3 and welding tape segment 2 located at the second crimping part 42 are both crimped onto the surface of the battery cell 1, and the welding tape segment 2 and diaphragm 3 on the entire surface of the battery cell 1 can be positioned on the surface of the battery cell 1, so that the diaphragm 3 and welding tape segment 2 are both positioned during the entire process of processing and fixing, thereby improving the fixing accuracy of the welding tape segment 2 and the battery cell 1 in the battery string.

[0052] In some embodiments, in order to improve the positioning accuracy of the welding tape segment 2 and the battery cell 1, the present application also sets a first tape fixing mechanism 70 and a second tape fixing mechanism 80 on the front end of the stringing table 10, and the second tape fixing mechanism 80 and the first tape fixing mechanism 70 are arranged in sequence along the conveying direction of the stringing table 10. The first tape fixing mechanism 70 is used to fix the tail end of the first group of welding tape segments located on the stringing station A, and the second tape fixing mechanism 80 is used to fix the tail end of the second group of welding tape segments extending out of the stringing station A.

[0053] The first belt fixing mechanism 70 and the second belt fixing mechanism 80, together with the first belt conveying mechanism 40 or the second belt conveying mechanism 50, control the leading ends of the first group of welding belt segments and the second group of welding belt segments located on the surface of the battery cell 1. When the first belt conveying mechanism 40 or the second belt conveying mechanism 50 controls the leading ends of the second group of welding belt segments located on the battery cell 1, the trailing ends of the second group of welding belt segments are at least controlled by the second belt fixing mechanism 80. When the stringing table 10 steps one battery cell 1 toward the rear end, the trailing ends of the second group of welding belt segments are detached from the second belt fixing mechanism 80 and transferred to the first belt fixing mechanism 70 for control. The next battery cell 1 is stacked below the second group of welding belt segments. Similarly, when continuously laying the battery string, the third group of welding belt segments can be laid on the next battery cell 1. The leading ends of the third group of welding belt segments are placed on the surface of the battery cell 1. At this time, the third group of welding belt segments will serve as the surface of the battery cell. The tail end of the second group of weld ribbon segments on the surface of the battery cell is used as the "second group of weld ribbon segments", and the tail end of the second group of weld ribbon segments extending out of the battery cell will serve as the "first group of weld ribbon segments" on the surface of the battery cell. The tail end of the second group of weld ribbon segments is staggered with the head end of the third group of weld ribbon segments, and the tail end of the third group of weld ribbon segments continues to be placed on the first belt fixing mechanism 70 and the second belt fixing mechanism 80. The first belt fixing mechanism 70 and the second belt fixing mechanism 80 continue to control and position the tail end of the weld ribbon segment on the battery cell 1, so as to jointly control the head and tail ends laid on the battery cell 1 with the first belt conveying mechanism 40 or the second belt conveying mechanism 50, so as to further improve the relative position accuracy of the weld ribbon segment 2 and the battery cell 1, and improve the series connection quality of the battery string.

[0054] Optionally, the first strap fixing mechanism 70 and the second strap fixing mechanism 80 each include a plurality of groups of clamping jaws for clamping the welding strip segments 2 in opposite directions, with the closed openings of the clamps facing upward, and the number of closed openings on each of the first strap fixing mechanism 70 and the second strap fixing mechanism 80 is the total number of welding strip segments 2 of the first group of welding strip segments and the second group of welding strip segments on a single battery cell 1.

[0055] It should be noted that the clamping jaws in this embodiment can move unidirectionally or oppositely, as long as they can clamp and control the two sides of the diameter of the welding strip segment 2, and the spacing of the closed opening is greater than or equal to the diameter of the welding strip segment 2.

[0056] In some embodiments, a battery cell cache position B is further provided at the front end of the stringing station 10. The battery cell cache position B is provided at the front side of the first fixing mechanism 70 or the second fixing mechanism 80, and is used to pre-arrange the battery cells 1 before the stringing station A. The stringing station 10 advances one battery cell 1 from the battery cell cache position B to the stringing station A each time.

[0057] Preferably, refer to Figure 2 and Figure 3As shown, the cell buffer position B extends horizontally or downwardly by at least a width of a cell 1. When the cell buffer position B is horizontally arranged at the front end of the stringing platform 10, the first belt fixing mechanism 70 and the second belt fixing mechanism 80 are both arranged at the upper part of the stringing platform 10, the stringing station A is arranged at the rear side of the second belt fixing mechanism 80, and the cell buffer position B is arranged at the front side of the first belt fixing mechanism 70; when the cell buffer position B is arranged at the front end of the stringing platform 10 extending downward, the cell buffer position B and the stringing station A are at a preset angle, the cell buffer position B is at least arranged at the front side of the second belt fixing mechanism 80, and the first belt fixing mechanism 70 is arranged above the cell buffer position B. The cell buffer position B and the stringing platform 10 are an integrated structure or a split structure, which is used to lay the cell 1 in advance at the front side of the stringing station A, and then the cell buffer position B continuously conveys the cell 1 located at the bottom layer of the laid cell string to the stringing station A.

[0058] Preferably, the solder tape transfer mechanism also includes a solder tape supply mechanism 91 and a solder tape cutting mechanism 92 arranged at the front end or one side of the stringing table 10. The solder tape supply mechanism 91 provides a continuous long solder tape to the solder tape cutting mechanism 92. The solder tape cutting mechanism 92 is used to cut the continuous long solder tape provided by the solder tape supply mechanism 91 into solder tape segments 2 connecting two adjacent battery cells 1. The cut solder tape segments 2 are grabbed and transported by the first belt conveyor mechanism 40 and the second belt conveyor mechanism 50 in batches to the stringing station A on the stringing table 10 to be laid and combined with the surface of the battery cell 1. The solder tape supply mechanism 91 and the solder tape cutting mechanism 92 can be set at the front end of the fabric stringing table 10, or can be set on one side of the fabric stringing table 10, and can be set side by side with the fabric stringing table 10. When they are set at the front end of the fabric stringing table 10, the first belt conveyor mechanism 40 and the second belt conveyor mechanism 50 transfer the cut solder tape segment 2 from the front end of the fabric stringing table 10 to the fabric stringing station A of the fabric stringing table 10. When they are set on one side of the fabric stringing table 10, the first belt conveyor mechanism 40 and the second belt conveyor mechanism 50 transfer the cut solder tape segment 2 from the side of the fabric stringing table 10 to the fabric stringing station A of the fabric stringing table 10.

[0059] Preferably, refer to Figure 1 and Figure 5 As shown, the film supply mechanism 30 and the tool supply mechanism 20 are arranged in the same line, and are jointly arranged on one side or the upper part of the cloth stringing table 10, and the discharge end of the film supply mechanism 30 is adjacent to or overlaps with the discharge end of the tool supply mechanism 20, so that the transfer mechanism 60 grabs the film sheet 3 and the positioning tool 4 from the film supply mechanism 30 and the tool supply mechanism 20. When the discharge end of the film supply mechanism 30 is adjacent to the discharge end of the tool supply mechanism 20, the transfer mechanism 60 grabs the positioning tool 4 and the film sheet 3 in sequence, so that the film sheet 3 is stacked on the lower part of the positioning tool 4, and when the discharge end of the film supply mechanism 30 overlaps with the discharge end of the tool supply mechanism 20, the positioning tool 4 is stacked on the film sheet 3, and the transfer mechanism 60 grabs the positioning tool 4 and the film sheet 3 placed at the bottom of the positioning tool 4 at one time, further improving the transfer efficiency of the transfer mechanism 60.

[0060] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0061] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A back contact battery coating string device, characterized in that: include: A stringing platform (10) is used to receive and transport the battery sheets (1), welding strip sections (2) and membrane sheets (3) for laying the battery string to the rear end; A tool supply mechanism (20) is provided on one side of the string arrangement platform (10) and is used to provide a positioning tool (4) that presses against the surface of the battery string; A film supply mechanism (30) for preparing a film (3) matching a single battery cell (1); The welding tape transfer mechanism comprises a first belt conveying mechanism (40) and a second belt conveying mechanism (50) which are movably arranged above the stringing platform (10), wherein the first belt conveying mechanism (40) is used to lay a first group of welding tape segments on the surface of the battery cell (1) on the stringing station (A) at the front end of the stringing platform (10), and the second belt conveying mechanism (50) is used to lay a second group of welding tape segments on the surface of the battery cell (1) on the stringing station (A) at the front end of the stringing platform (10), and the first group of welding tape segments and the second group of welding tape segments are alternately arranged on the surface of the battery cell (1); The transfer mechanism (60) is movably arranged above the stringing table (10), and is used to transfer the positioning tool (4) and the membrane (3), and to lay the membrane (3) on top of the first group of welding strip segments and the second group of welding strip segments on the battery cell (1), and to press the positioning tool (4) against the upper part of the membrane (3).

2. The back contact battery coating string device according to claim 1, characterized in that: The transfer mechanism (60) comprises a first grabbing component (61) and a second grabbing component (62) which are arranged at intervals, wherein the first grabbing component (61) is used to grab the positioning tool (4), and the second grabbing component (62) is used to grab the membrane (3); the membrane (3) is adsorbed and positioned below the positioning tool (4) by the second grabbing component (62), and is synchronously transferred with the positioning tool (4) to the top of the first group of welding strip segments and the second group of welding strip segments of the stringing station (A).

3. The back contact battery coating string device according to claim 2, characterized in that: The positioning tool (4) comprises a first crimping part (41) and a second crimping part (42), wherein the second crimping part (42) is capable of vertically moving relative to the first crimping part (41), and the first crimping part (41) and / or the second crimping part (42) are provided with a through hole for the suction claw of the second grabbing assembly (62) to pass through.

4. The back contact battery coating string device according to claim 3, characterized in that: The pressing surface of the second crimping part (42) in the positioning tool (4) placed on the cloth string station (A) is higher than the pressing surface of the first crimping part (41), and the pressing surface of the second crimping part (42) in the positioning tool (4) placed at the rear end of the cloth string station (A) is flush with the pressing surface of the first crimping part (41).

5. The back contact battery coating string device according to claim 1, characterized in that: Along the conveying direction of the stringing platform (10), a second belt fixing mechanism (80) and a first belt fixing mechanism (70) are sequentially provided on the front end of the stringing platform (10), wherein the first belt fixing mechanism (70) is used to fix the tail end of the first group of welding belt segments located on the stringing station (A), and the second belt fixing mechanism (80) is used to fix the tail end of the second group of welding belt segments extending out of the stringing station (A).

6. The back contact battery coating string device according to claim 5, characterized in that: The first tape fixing mechanism (70) and the second tape fixing mechanism (80) both comprise a plurality of groups of clamping jaws for clamping the welding tape segments (2) in opposite directions, the closed openings of the clamping jaws facing upward, and the number of the closed openings on each of the first tape fixing mechanism (70) and the second tape fixing mechanism (80) is the total number of welding tape segments (2) of the first group of welding tape segments and the second group of welding tape segments on a single battery cell (1).

7. The back contact battery coating string device according to claim 5, characterized in that: The front end of the stringing platform (10) is also provided with a battery cell buffer position (B), and the battery cell buffer position (B) is arranged on the front side of the first belt fixing mechanism (70) or the second belt fixing mechanism (80), and is used to pre-lay out the battery cells (1) before the stringing station (A). The stringing platform (10) advances one battery cell (1) from the battery cell buffer position (B) to the stringing station (A) each time.

8. The back contact battery coating string device according to claim 7, characterized in that: The battery cell cache position (B) is arranged to extend horizontally or downwardly by a distance equal to at least the width of a battery cell (1).

9. The back contact battery coating string device according to claim 1, characterized in that: The solder strip transfer mechanism further comprises a solder strip supply mechanism (91) and a solder strip cutting mechanism (92) arranged at the front end or one side of the threading platform (10); the solder strip cutting mechanism (92) is used to cut the continuous long solder strip provided by the solder strip supply mechanism (91) into solder strip segments (2) that connect two adjacent battery cells (1).

10. The back contact battery coating string device according to claim 1, characterized in that: The film supply mechanism (30) and the tool supply mechanism (20) are arranged in a colinear manner, and the discharge end of the film supply mechanism (30) is adjacent to or overlaps with the discharge end of the tool supply mechanism (20), and the transfer mechanism (60) grabs the film sheet (3) and the positioning tool (4) from the film supply mechanism (30) and the tool supply mechanism (20) together.

Images