Battery string welding equipment and welding method

Abstract

The present invention provides a battery string welding device, including a welding conveying mechanism, a battery cell laying mechanism, a welding strip pulling mechanism, a welding strip processing mechanism, a welding strip laying mechanism and a welding mechanism, wherein: the battery cell laying mechanism lays the battery cell on the welding conveying mechanism; the welding strip pulling mechanism pulls the welding strip to the welding strip processing mechanism; the welding strip processing mechanism staggers all odd-numbered welding strips with all even-numbered welding strips, and alternately cuts off all odd-numbered welding strips and all even-numbered welding strips to obtain a first welding strip group and a second welding strip group, and the welding strip processing mechanism also adjusts the spacing between each first welding strip group and each second welding strip group to a second predetermined spacing; the welding strip laying mechanism stacks the first welding strip group and the second welding strip group on the welding strip processing mechanism onto a number of laid battery cells; the welding mechanism welds the stacked welding strip groups and battery cells into a string. The battery string welding device of the present invention realizes the welding of back-connected battery cells into a string.

Description

Technical Field

[0001] The invention relates to the field of battery production, in particular to a battery string welding device and a welding method. Background Art

[0002] There is no main grid line on the front of the back-connected (IBC) cell, and the positive electrode row and the negative electrode row are arranged on the back of the cell, thereby reducing the shading of the cell and improving the light conversion efficiency of the cell.

[0003] like Figure 1 The back-connected battery cell 200 shown has a first electrode (such as a positive electrode) and a second electrode (such as a negative electrode) with opposite polarities on its back side. The first electrodes are arranged in rows to form at least two first electrode rows 201, and the second electrodes are arranged in rows to form at least two second electrode rows 202. The first electrode rows 201 and the second electrode rows 202 are arranged alternately.

[0004] like Figure 2 As shown, the back-connected battery cells are welded into a string in the following manner: N (4 in the figure) battery cells 200 are laid out in sequence with the back side facing upward, and the polarities of the electrode rows of adjacent battery cells on the same straight line are opposite. N+1 (5 in the figure) welding ribbon groups are used to weld the N battery cells 200 into a string, wherein: the first welding ribbon group (the 1st, 3rd and 5th welding ribbon groups in the figure) and the second welding ribbon group (the 2nd and 4th welding ribbon groups in the figure) are laid out alternately.

[0005] In order to achieve the staggered placement of the first and second welding ribbon groups, the traditional back-connected battery cell welding equipment needs to set up two welding ribbon roll groups, each of which includes multiple welding ribbon rolls. The welding ribbon traction mechanism pulls and obtains the first and second welding ribbon groups from the two welding ribbon roll groups in turn, and lays the first and second welding ribbon groups alternately on the battery cells.

[0006] Traditional back-connected cell welding equipment has low efficiency in processing solder strips, which ultimately affects the production efficiency of cell strings. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a battery string welding device, which adopts the following technical solutions:

[0008] A battery string welding device is used to weld battery cells into strings. The back of the battery cell is provided with a first electrode row and a second electrode row arranged in a staggered manner. The battery string welding device includes a welding conveying mechanism, a battery cell laying mechanism, a welding ribbon pulling mechanism, a welding ribbon processing mechanism, a welding ribbon laying mechanism and a welding mechanism, wherein:

[0009] The welding conveying mechanism is used to carry at least the battery sheet and the welding ribbon group;

[0010] The cell laying mechanism is used to lay a plurality of cells with a first predetermined spacing on the welding conveying mechanism with their backs facing upwards, and the polarities of the electrode rows of adjacent cells on the same straight line are opposite;

[0011] The welding ribbon pulling mechanism is used to pull a plurality of welding ribbons extending along a first horizontal direction to the welding ribbon processing mechanism;

[0012] The welding strip processing mechanism is used to stagger all odd welding strips and all even welding strips by a predetermined distance in the first horizontal direction, and alternately cut all odd welding strips and all even welding strips to obtain a plurality of first welding strip groups and a plurality of second welding strip groups. The welding strip processing mechanism is also used to adjust the spacing between the first welding strip groups and the spacing between the second welding strip groups to a second predetermined spacing;

[0013] The welding tape laying mechanism is used to stack a plurality of first welding tape groups and a plurality of second welding tape groups on the welding tape processing mechanism onto a plurality of laid battery cells, and each first welding tape group is stacked onto an odd-numbered electrode row of a corresponding battery cell, and each second welding tape group is stacked onto an even-numbered electrode row of a corresponding battery cell;

[0014] The welding mechanism is used to weld the stacked welding ribbon groups and battery cells into strings.

[0015] Through the cooperation of the welding conveying mechanism, the battery cell laying mechanism, the welding strip pulling mechanism, the welding strip processing mechanism and the welding strip laying mechanism, the battery string welding equipment of the present invention realizes the welding of back-connected battery cells into strings.

[0016] In particular, through the processing of the solder tape processing mechanism, the present invention realizes the simultaneous feeding of the first solder tape group and the second solder tape group, and completes the misalignment processing between the first solder tape group and the second solder tape group, and adjusts the spacing between each first solder tape group and the spacing between each second solder tape group to a predetermined value, that is, the solder tape processing mechanism completes the layout of the first solder tape group and the second solder tape group, so that the solder tape laying mechanism can lay all the first solder tape groups and the second solder tape groups on the battery cell at one time, thereby greatly improving the production efficiency.

[0017] In some embodiments, the solder strip processing mechanism includes a plurality of first solder strip clamping assemblies, a plurality of second solder strip clamping assemblies, a plurality of first solder strip cutters, and a plurality of second solder strip cutters arranged along a first direction, wherein:

[0018] A plurality of first welding strip clamping assemblies cooperate to clamp all odd-numbered welding strips, a first welding strip cutter is arranged between each adjacent first welding strip clamping assemblies, and each first welding strip cutter is used to cut off all odd-numbered welding strips at a corresponding position to obtain a plurality of first welding strip groups;

[0019] A plurality of second welding strip clamping assemblies cooperate to clamp all the even-numbered welding strips, a second welding strip cutter is arranged between each adjacent second welding strip clamping assemblies, and each second welding strip cutter is used to cut all the even-numbered welding strips at a corresponding position to obtain a plurality of second welding strip groups;

[0020] Before all the odd-numbered welding strips are cut, a plurality of first welding strip clamping assemblies and / or a plurality of second welding strip clamping assemblies are translated in a first horizontal direction so that all the odd-numbered welding strips and all the even-numbered welding strips are staggered by a predetermined distance in the first horizontal direction;

[0021] After all the odd-numbered solder strips are cut, each first solder strip clamping assembly clamps a corresponding first solder strip group, and each first solder strip clamping assembly is further configured to separate in a first horizontal direction to adjust the spacing between each first solder strip group to a second predetermined spacing;

[0022] After all the even-numbered welding strips are cut, each second welding strip clamping assembly clamps a corresponding second welding strip group, and each second welding strip clamping assembly is also configured to be separated in the first horizontal direction to adjust the spacing between each second welding strip group to a second predetermined spacing.

[0023] Through the cooperation of the first solder strip clamping assembly, the second solder strip clamping assembly, the first solder strip cutter and the second solder strip cutter, the solder strip processing mechanism realizes the misalignment processing between the first solder strip group and the second solder strip group, and adjusts the spacing between each first solder strip group and the spacing between each second solder strip group to a predetermined value.

[0024] In some embodiments, the welding strip processing mechanism also includes a base and an offset slide extending along a first horizontal direction, a first welding strip group spacing slide and a second welding strip group spacing slide, wherein: the offset slide is arranged on the base, the first welding strip group spacing slide is slidably connected to the offset slide, and a plurality of first welding strip clamping assemblies are connected to the first welding strip group spacing slide; the second welding strip group spacing slide is arranged on the base, and a plurality of second welding strip clamping assemblies are connected to the second welding strip group spacing slide; before all the odd-numbered welding strips are cut off, the first welding strip group The spacing slide rail slides along the offset slide rail so that all odd-numbered welding strips and all even-numbered welding strips are staggered by a predetermined distance in the first horizontal direction; after all odd-numbered welding strips are cut off, a plurality of first welding strip clamping assemblies slide apart along the first welding strip group spacing slide rail so as to adjust the spacing between each first welding strip group to a second predetermined spacing; after all even-numbered welding strips are cut off, a plurality of second welding strip clamping assemblies slide apart along the second welding strip group spacing slide rail so as to adjust the spacing between each second welding strip group to a second predetermined spacing.

[0025] By arranging a staggered slide rail, a first welding strip group spacing slide rail and a second welding strip group spacing slide rail on the base, and arranging all the first welding strip clamping assemblies and all the second welding strip clamping assemblies on the first welding strip group spacing slide rail and the second welding strip group spacing slide rail respectively, the staggered drive between the first welding strip clamping assemblies and the second welding strip clamping assemblies, as well as the spacing drive between the first welding strip clamping assemblies and the second welding strip clamping assemblies are realized.

[0026] In some embodiments, the first welding ribbon cutter and the second welding ribbon cutter both include a first mounting bracket, a fixed cutter, a movable cutter and a movable cutter driving mechanism, wherein: the fixed cutter is fixedly arranged on the first mounting bracket and extends along the second horizontal direction, and a fixed cutting blade is formed at the upper edge of the fixed cutter; the movable cutter is slidably arranged on the first mounting bracket and fits with the fixed cutter, and a plurality of hook knives are arranged side by side along the second horizontal direction on the movable cutter, the hook knives extend upward from the upper edge of the movable cutter, and a movable cutting blade is formed at the lower edge of the hook knives; the movable cutter driving mechanism is used to drive the movable cutter to slide relative to the fixed cutter to realize the position switching of the movable cutter between a high position and a low position; when the movable cutter slides to a high position, a gap for the welding ribbon to pass through is formed between the movable cutting blade of each hook knife and the fixed cutting blade of the fixed cutter; when the movable cutter slides to a low position, the movable cutting blade of each hook knife cooperates with the fixed cutting blade of the fixed cutter to cut off the welding ribbon passing between the two.

[0027] By setting the first welding strip cutter and the second welding strip cutter, when the first welding strip cutter cuts all the odd-numbered welding strips, all the even-numbered welding strips that do not need to be cut can be avoided. Similarly, when the second welding strip cutter cuts all the even-numbered welding strips, all the odd-numbered welding strips that do not need to be cut can be avoided. In addition, the hook knife can cut both round welding strips and flat welding strips, which increases the compatibility of the first welding strip cutter and the second welding strip cutter.

[0028] In some embodiments, the welding ribbon traction mechanism includes a first moving mechanism, a second mounting bracket, a fixed clamping plate, a first driving assembly, a second driving assembly, and a plurality of first clamps and a plurality of second clamps arranged alternately along a second horizontal direction perpendicular to the first horizontal direction, wherein: the second mounting bracket is installed on the movable part of the first moving mechanism, and the first moving mechanism is used to drive the second mounting bracket to move; the fixed clamping plate is fixedly connected to the mounting bracket; the first driving assembly is arranged on the mounting bracket, and the plurality of first clamps are configured to press all odd-numbered welding ribbons onto the fixed clamping plate under the drive of the first driving assembly; the second driving assembly is arranged on the mounting bracket, and the plurality of second clamps are configured to press all even-numbered welding ribbons onto the fixed clamping plate under the drive of the second driving assembly.

[0029] A welding ribbon pulling mechanism with a simple structure is provided, which can pull out multiple welding ribbons at the same time, and pull all the odd-numbered welding ribbons and all the even-numbered welding ribbons to different welding ribbon placement stations respectively, thereby improving the production efficiency of back-connected battery strings.

[0030] In some embodiments, the battery string welding equipment also includes a solder strip unwinding mechanism and a solder strip cutting mechanism, wherein: the solder strip unwinding mechanism includes a first mounting plate and a plurality of discharge trays arranged on the first mounting plate, each discharge tray supports a roll of solder strip and discharges a solder strip; the solder strip discharged from the discharge tray is guided into the solder strip cutting mechanism; the solder strip pulling mechanism pulls the solder strip from the solder strip cutting mechanism and pulls the solder strip to the solder strip processing mechanism; the solder strip cutting mechanism cuts the pulled solder strip.

[0031] By setting up a soldering tape unwinding mechanism and a soldering tape cutting mechanism, the feeding and cutting of the soldering tape are realized.

[0032] In some embodiments, the battery string welding equipment also includes a tool carrier frame arranged above the welding tape processing mechanism and configured to be liftable; the tool carrier frame is used to receive and carry a plurality of welding tape pressing tools with a third predetermined spacing, and the welding tape pressing tools are aligned up and down with the first welding tape group and the second welding tape group after spacing located on the welding tape processing mechanism according to a predetermined rule; the welding tape laying mechanism simultaneously picks up a plurality of first welding tape groups, a plurality of second welding tape groups and a plurality of welding tape pressing tools, and lays the picked-up plurality of first welding tape groups, a plurality of second welding tape groups and a plurality of welding tape pressing tools on a plurality of battery cells.

[0033] By setting up a tooling carrier, a transfer cache for the tooling is achieved, so that the solder tape group and the tooling can be simultaneously transported and stacked on the laid battery cells by the solder tape laying mechanism.

[0034] In some embodiments, the solder tape laying mechanism includes a second moving mechanism, a third mounting bracket, a tooling suction portion and a solder tape clamping portion, wherein: the third mounting bracket is installed on the movable part of the second moving mechanism, and the second moving mechanism is used to drive the third mounting bracket to move; the tooling suction portion and the solder tape clamping portion are both installed on the third mounting bracket; when the third mounting bracket is driven by the second moving mechanism to move to the picking station located above the tooling carrier, the tooling suction portion absorbs a number of solder tape pressing tooling from the tooling carrier, and the solder tape clamping portion clamps a number of first solder tape groups and a number of second solder tape groups from the solder tape processing mechanism; when the third mounting bracket is driven by the second moving mechanism to move to the laying station located above the welding conveying mechanism, the tooling suction portion and the solder tape clamping portion release a number of solder tape pressing tooling, a number of first solder tape groups and a number of second solder tape groups.

[0035] A welding tape laying mechanism with a simple structure and convenient control is provided, which implements synchronous transportation and laying of welding tape pressing tooling and welding tape groups through the cooperation of a suction part and a welding tape clamping part.

[0036] In some embodiments, the battery string welding equipment also includes a tooling circulation conveying mechanism, a tooling loading and transporting mechanism, and a tooling unloading and transporting mechanism, wherein: the tooling circulation conveying mechanism is used to circulate the welding strip pressing tooling; the tooling loading and transporting mechanism is used to pick up multiple welding strip pressing tools from the tooling circulation conveying mechanism, and adjust the spacing between the picked multiple welding strip pressing tools to a third predetermined spacing and then place them on the tooling carrier; the tooling unloading and transporting mechanism is used to transport the welding strip pressing tooling from the welding conveying mechanism back to the tooling circulation conveying mechanism after welding is completed.

[0037] Through the cooperation of the tooling circulation conveying mechanism, the tooling loading and unloading conveying mechanism and the tooling unloading and unloading mechanism, the circulation conveying of the welding strip pressing tooling and the automatic loading and unloading are realized.

[0038] In some embodiments, the tooling loading and handling mechanism includes a third moving mechanism, a fourth mounting bracket, a second mounting plate, a mounting plate lifting mechanism, a plurality of tooling adsorption plates and a first spacing driving mechanism, wherein: the fourth mounting bracket is installed on the movable part of the third moving mechanism, and the third moving mechanism is used to drive the fourth mounting bracket to move; the second mounting plate is slidably connected to the fourth mounting bracket; a plurality of tooling adsorption plates are slidably connected side by side on the second mounting plate, and each tooling adsorption plate is used to adsorb a solder strip pressing tooling; the mounting plate lifting mechanism is used to drive the second mounting plate to slide up and down along the fourth mounting bracket to drive each tooling adsorption plate to rise and fall synchronously; the first spacing driving mechanism is used to drive each tooling adsorption plate to slide toward the middle or slide apart to both sides along the second mounting plate to adjust the spacing between the solder strip pressing tooling to the third predetermined spacing.

[0039] A tool loading and transporting mechanism with a simple structure and convenient control is provided, which can absorb multiple welding strip pressing tools from a tool circulation conveying mechanism, and after adjusting the spacing between the welding strip pressing tools to a third predetermined spacing, transport them to a tool carrier.

[0040] In some embodiments, the battery string welding equipment also includes a battery cell conveying mechanism, a battery cell transporting mechanism and a battery cell aligning mechanism, wherein: the battery cell conveying mechanism is used to input battery cells to be welded; the battery cell transporting mechanism is used to transport the battery cells input by the battery cell conveying mechanism to the battery cell aligning mechanism; the battery cell aligning mechanism is used to implement the aligning of the battery cells so as to at least adjust the spacing between the battery cells to a first predetermined spacing.

[0041] Through the cooperation of the battery cell conveying mechanism, the battery cell handling mechanism and the battery cell aligning mechanism, automatic loading and automatic aligning of the battery cells are realized.

[0042] In some embodiments, a battery cell rotating mechanism is also provided on the battery cell conveying mechanism; the battery cell rotating mechanism is used to rotate the battery cells so that the polarities of the electrode rows of adjacent battery cells on the same straight line are opposite.

[0043] By arranging a cell rotating mechanism on the cell conveying mechanism, the cell is rotated, thereby ensuring that the polarities of the electrode rows of adjacent cells on the same straight line are opposite.

[0044] In some embodiments, the battery cell arranging mechanism includes a mounting seat, multiple supporting mechanisms and a second spacing driving mechanism, wherein: the multiple supporting mechanisms are arranged side by side on the mounting seat, and each supporting mechanism is used to carry a battery cell; the second spacing driving mechanism is arranged on the mounting seat, and the second spacing driving mechanism is configured to independently drive each supporting mechanism to translate so as to adjust the spacing between the battery cells carried on the supporting mechanism to a first predetermined spacing.

[0045] A battery sheet regularization mechanism with a simple structure and convenient control is provided, which drives a plurality of bearing mechanisms to move relative to each other through a second spacing driving mechanism, thereby adjusting the spacing between battery sheets.

[0046] The present invention also provides a battery string welding method for welding battery cells into a string, wherein the back of the battery cell is provided with a first electrode row and a second electrode row arranged in a staggered manner, and the battery string welding method comprises:

[0047] Laying a plurality of battery cells with a first predetermined spacing on a welding conveyor mechanism with their backs facing upward, wherein the polarities of the electrode rows of adjacent battery cells that are in the same straight line are opposite;

[0048] Pulling a plurality of welding ribbons extending along a first horizontal direction onto a welding ribbon processing mechanism;

[0049] Control the welding strip processing mechanism to stagger all odd-numbered welding strips and all even-numbered welding strips by a predetermined distance in a first horizontal direction;

[0050] Controlling the welding strip processing mechanism to alternately cut off all odd-numbered welding strips and all even-numbered welding strips to obtain a plurality of first welding strip groups and a plurality of second welding strip groups;

[0051] Controlling the welding strip processing mechanism to adjust the spacing between each first welding strip group and the spacing between each second welding strip group to a second predetermined spacing;

[0052] Stacking the first welding tape group on the odd-numbered electrode rows of the corresponding battery cells, and stacking the second welding tape group on the even-numbered electrode rows of the corresponding battery cells;

[0053] Weld the stacked solder ribbon groups and battery cells into strings.

[0054] The battery string welding method of the present invention realizes the welding of back-connected battery sheets into strings.

[0055] In particular, the present invention realizes the simultaneous feeding of the first welding ribbon group and the second welding ribbon group, completes the misalignment processing between the first welding ribbon group and the second welding ribbon group, and adjusts the spacing between each first welding ribbon group and the spacing between each second welding ribbon group to a predetermined value. The present invention realizes the layout of the first welding ribbon group and the second welding ribbon group. In this way, the welding ribbon laying mechanism can lay all the first welding ribbon groups and the second welding ribbon groups on the battery cell at one time, thereby greatly improving the production efficiency.

[0056] Optionally, pulling the plurality of welding ribbons extending along the first horizontal direction onto the welding ribbon processing mechanism includes:

[0057] Pulling a plurality of welding ribbons extending along a first horizontal direction to a first welding ribbon placement position, releasing all odd-numbered welding ribbons, and allowing all odd-numbered welding ribbons to fall onto a welding ribbon processing mechanism;

[0058] Continue to pull all the even-numbered welding ribbons to the second welding ribbon placement position behind the first welding ribbon placement, release all the even-numbered welding ribbons, and make all the even-numbered welding ribbons fall onto the welding ribbon processing mechanism; or

[0059] Pulling a plurality of welding ribbons extending along a first horizontal direction to a first welding ribbon placement position, releasing all even-numbered welding ribbons, so that all even-numbered welding ribbons fall onto the welding ribbon processing mechanism;

[0060] All the odd-numbered welding ribbons are further pulled to the second welding ribbon placement position behind the first welding ribbon placement, and all the odd-numbered welding ribbons are released so that all the odd-numbered welding ribbons fall onto the welding ribbon processing mechanism.

[0061] The odd-numbered welding strips and the even-numbered welding strips are pulled to different welding strip placement stations, so that the odd-numbered welding strips and the even-numbered welding strips of different lengths are pulled to the welding strip processing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a structural diagram of a back-connected battery cell;

[0063] Figure 2 It is a schematic diagram of the structure after four back-connected solar cells are welded into a string by a welding ribbon assembly;

[0064] Figure 3 A schematic diagram of the structure of the battery string welding equipment provided by the present invention;

[0065] Figure 4It is a structural schematic diagram of a welding strip processing mechanism according to an embodiment of the present invention at one viewing angle;

[0066] Figure 5 It is a structural schematic diagram of the welding strip processing mechanism of an embodiment of the present invention from another viewing angle;

[0067] Figure 6 It is a schematic diagram of clamping the welding strip by the first welding strip clamping assembly and the second welding strip clamping assembly in one embodiment of the present invention;

[0068] Figure 7 It is a schematic diagram of assembling a first welding ribbon clamping assembly and a corresponding first welding ribbon cutter in an embodiment of the present invention;

[0069] Figure 8 Schematic diagram of the structure of a first welding ribbon cutter in an embodiment of the present invention;

[0070] Fig. 9 Schematic diagram of the structure of the welding strip traction mechanism in an embodiment of the present invention;

[0071] Fig.10 It is a partial structural schematic diagram of the welding strip traction mechanism in an embodiment of the present invention;

[0072] Fig.11 It is a structural schematic diagram of a welding tape laying mechanism in an embodiment of the present invention;

[0073] Fig.12 It is a structural schematic diagram of a tool loading and handling mechanism in an embodiment of the present invention;

[0074] Fig.13 is a schematic structural diagram of a battery sheet regularization mechanism in an embodiment of the present invention;

[0075] Figures 1 to 13 The following reference numerals are included:

[0076] Welding conveying mechanism 10;

[0077] Cell laying mechanism 20;

[0078] The welding strip pulling mechanism 30 includes a first moving mechanism 31, a second mounting bracket 32, a fixed clamping plate 33, a first driving assembly 34, a second driving assembly 35, a first clamping jaw 36, and a second clamping jaw 37;

[0079] The welding strip processing mechanism 40 includes a first welding strip clamping assembly 41, a second welding strip clamping assembly 42, a first welding strip cutter 43, a second welding strip cutter 44, a dislocation slide rail 45, a first welding strip group spacing slide rail 46, a second welding strip group spacing slide rail 47, a connecting rod 48, a first mounting bracket 431, a fixed cutter 432, a movable cutter 433, a movable cutter driving mechanism 434, and a hooking knife 435;

[0080] The welding tape laying mechanism 50 includes a second moving mechanism, a third mounting bracket 51, a tooling suction part 52, and a welding tape clamping part 53;

[0081] Welding mechanism 60;

[0082] Welding strip unwinding mechanism 70;

[0083] Welding strip cutting mechanism 80;

[0084] Tooling carrier 90;

[0085] Tool circulation conveying mechanism 100;

[0086] Tool loading and handling mechanism 110: fourth mounting bracket 111, second mounting plate 112, mounting plate lifting mechanism 113, tool adsorption plate 114, first spacing driving mechanism 114;

[0087] Tool unloading and handling mechanism 120;

[0088] Battery sheet conveying mechanism 130;

[0089] Cell aligning mechanism 140: mounting seat 141, carrying mechanism 142, second spacing driving mechanism 143

[0090] The battery cell rotating mechanism 150 . DETAILED DESCRIPTION

[0091] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0092] In order to achieve the staggered placement of the welding ribbon group, the traditional back-connected battery cell welding equipment needs to set up two welding ribbon roll groups, each of which includes multiple welding ribbon rolls. The welding ribbon traction mechanism pulls and obtains the first welding ribbon group and the second welding ribbon group from the two welding ribbon roll groups in turn, and processes the first welding ribbon group and the second welding ribbon group and lays them on the battery cell in an interlaced manner.

[0093] Traditional back-connected cell welding equipment has low efficiency in processing solder strips, which ultimately affects the production efficiency of cell strings.

[0094] In view of this, the present invention provides a battery string welding device and a welding method to weld back-connected battery cells into strings.

[0095] like Figure 3 As shown, the battery string welding equipment provided by the present invention includes a welding conveying mechanism 10, a battery cell laying mechanism 20, a welding strip pulling mechanism 30, a welding strip processing mechanism 40, a welding strip laying mechanism 50 and a welding mechanism 60, wherein:

[0096] The welding conveying mechanism 10 is used at least to carry the battery cells and the welding ribbon group.

[0097] The cell laying mechanism 20 is used to lay a plurality of cells with a first predetermined spacing on the welding conveyor mechanism 10 with their backs facing upwards, and the polarities of the electrode rows of adjacent cells on the same straight line are opposite. The first predetermined spacing is the cell spacing of the target cell string to be welded.

[0098] The soldering ribbon pulling mechanism 30 is used to pull a plurality of soldering ribbons extending along a first horizontal direction (eg, the X-axis direction in the figure) to the soldering ribbon processing mechanism 40 .

[0099] The welding strip processing mechanism 40 is used to stagger all odd welding strips and all even welding strips by a predetermined distance in the first horizontal direction, and alternately cut all odd welding strips and all even welding strips to obtain a plurality of first welding strip groups and a plurality of second welding strip groups. The welding strip processing mechanism 40 is also used to adjust the spacing between each first welding strip group and the spacing between each second welding strip group to a second predetermined spacing. Of course, the second predetermined spacing is related to the sheet spacing (first predetermined spacing) of the target battery string.

[0100] The solder tape laying mechanism 50 is used to stack several first solder tape groups and several second solder tape groups on the solder tape processing mechanism 40 onto several laid-out battery cells, and to make each first solder tape group stacked on the odd-numbered electrode rows of the corresponding battery cell, and each second solder tape group stacked on the even-numbered electrode rows of the corresponding battery cell.

[0101] The welding mechanism 60 is used to weld the stacked welding ribbon groups and battery cells into strings.

[0102] The working process of the battery string welding equipment of the present invention is as follows:

[0103] The cell laying mechanism 20 lays a plurality of cells with a first predetermined spacing on the welding conveying mechanism 10 with their backs facing upwards, and ensures that the polarities of the electrode rows of adjacent cells on the same straight line are opposite.

[0104] The welding ribbon pulling mechanism 30 pulls a plurality of welding ribbons extending along a first horizontal direction to the welding ribbon processing mechanism 40 .

[0105] The solder strip processing mechanism 40 processes the solder strip, specifically including:

[0106] First, the welding strip processing mechanism 40 staggers all odd-numbered welding strips and all even-numbered welding strips by a predetermined distance in the first horizontal direction.

[0107] Next, the welding ribbon processing mechanism 40 alternately cuts off all the odd-numbered welding ribbons and all the even-numbered welding ribbons, thereby obtaining a plurality of first welding ribbon groups and a plurality of second welding ribbon groups.

[0108] Finally, the welding strip processing mechanism 40 adjusts the spacing between each first welding strip group and the spacing between each second welding strip group to the second predetermined spacing. At this point, the spacing of the first welding strip groups and the second welding strip groups has been adjusted according to the welding requirements of the target battery string.

[0109] The solder tape laying mechanism 50 grabs all the first solder tape groups and the second solder tape groups from the solder tape processing mechanism 40, and stacks them on the battery cells laid on the battery cell laying mechanism 20, wherein each first solder tape group is stacked on the odd-numbered electrode rows of the corresponding battery cell, and each second solder tape group is stacked on the even-numbered electrode rows of the corresponding battery cell.

[0110] The welding conveying mechanism 10 conveys the stacked battery cells and welding ribbon groups to the welding mechanism 60 , and the welding mechanism 60 welds the stacked battery cells and welding ribbon groups into a string.

[0111] It can be seen that the battery string welding equipment provided by the present invention realizes the welding of back-connected battery cells into strings. In particular, the present invention realizes the simultaneous feeding of the first welding ribbon group and the second welding ribbon group, completes the misalignment processing between the first welding ribbon group and the second welding ribbon group, and adjusts the spacing between each first welding ribbon group and each second welding ribbon group, that is, realizes the spacing adjustment between the first welding ribbon group and the second welding ribbon group.

[0112] In this way, the solder ribbon laying mechanism 50 can lay all the first solder ribbon groups and the second solder ribbon groups on the battery cells at one time, thereby greatly improving the production efficiency of the battery string.

[0113] like Figures 4 to 6 As shown, the solder strip processing mechanism 40 includes a plurality of first solder strip clamping assemblies 41, a plurality of second solder strip clamping assemblies 42, a plurality of first solder strip cutters 43 and a plurality of second solder strip cutters 44 arranged along a first direction, wherein:

[0114] A plurality of first welding strip clamping assemblies 41 cooperate to clamp all odd-numbered welding strips, and a first welding strip cutter 43 is arranged between each adjacent first welding strip clamping assemblies 41. Each first welding strip cutter 43 is used to cut off all odd-numbered welding strips at a corresponding position, thereby obtaining a plurality of first welding strip groups.

[0115] A plurality of second solder strip clamping assemblies 42 cooperate to clamp all the even-numbered solder strips, and a second solder strip cutter 44 is arranged between each adjacent second solder strip clamping assemblies 42. Each second solder strip cutter 44 is used to cut all the even-numbered solder strips at the corresponding position, thereby obtaining a plurality of second solder strip groups.

[0116] Before all the odd-numbered welding strips are cut, the first welding strip clamping assemblies 41 and the second welding strip clamping assemblies 42 are relatively translated in the first horizontal direction, so that all the odd-numbered welding strips and all the even-numbered welding strips are staggered by a predetermined distance in the first horizontal direction.

[0117] After all the odd-numbered solder strips are cut, each first solder strip clamping assembly 41 clamps a corresponding first solder strip group, and each first solder strip clamping assembly 41 is also configured to be separated in the first horizontal direction, so as to adjust the spacing between each first solder strip group to a second predetermined spacing.

[0118] After all the even-numbered solder strips are cut, each second solder strip clamping assembly 42 clamps a corresponding second solder strip group, and each second solder strip clamping assembly 42 is also configured to be separated in the first horizontal direction to adjust the spacing between each second solder strip group to a second predetermined spacing.

[0119] like Figure 6 As shown, in one embodiment, the solder strip processing mechanism 40 includes six first solder strip clamping assemblies 41, six second solder strip clamping assemblies 42, five first solder strip cutters 43 and five second solder strip cutters 44, wherein: a first solder strip cutter 43 is arranged between two adjacent first solder strip clamping assemblies 41, and a second solder strip cutter 44 is arranged between two adjacent second solder strip clamping assemblies 42.

[0120] Figure 6 The working process of the welding strip processing mechanism 40 in the embodiment is as follows:

[0121] The welding ribbon pulling mechanism 30 is controlled to pull a plurality of welding ribbons (such as 17 in the figure) extending along a first horizontal direction (such as the X-axis direction in the figure) to the welding ribbon processing mechanism 40 .

[0122] The first solder strip clamping assembly 41 and the second solder strip clamping assembly 42 are controlled to clamp the solder strips, wherein: the six first solder strip clamping assemblies 41 cooperate to clamp all odd-numbered solder strips from different positions, and the six second solder strip clamping assemblies 42 cooperate to clamp all even-numbered solder strips from different positions.

[0123] The six first solder strip clamping assemblies 412 are controlled to translate relative to the six second solder strip clamping assemblies 42, so that all odd-numbered solder strips and all even-numbered solder strips are staggered by a predetermined distance in the first horizontal direction.

[0124] Next, the five first welding strip cutters 43 and the five second welding strip cutters 44 are controlled to synchronously cut all the odd-numbered welding strips and even-numbered welding strips from the corresponding positions. In this way, six first welding strip groups and six second welding strip groups are obtained. In addition, each first welding strip group is clamped on the corresponding first welding strip clamping assembly 41, and each second welding strip group is clamped on the corresponding second welding strip clamping assembly 42.

[0125] Finally, the six first solder strip clamping assemblies 41 are controlled to move apart in translation, so as to adjust the spacing between the six first solder strip groups to the second predetermined spacing. The six second solder strip clamping assemblies 42 are controlled to move apart in translation, so as to adjust the spacing between the six second solder strip groups to the second predetermined spacing.

[0126] Continue to refer Figure 4 As shown, optionally, the welding strip processing mechanism 40 further includes a base, and a dislocation slide rail 45 extending along a first horizontal direction, a first welding strip group spacing slide rail 46 and a second welding strip group spacing slide rail 47, wherein:

[0127] The offset slide rail 45 is arranged on the base, the first welding strip assembly spacing slide rail 46 is slidably connected to the offset slide rail 45 , and a plurality of first welding strip clamping assemblies 41 are connected to the first welding strip assembly spacing slide rail 46 .

[0128] The second welding ribbon assembly spacing slide rail 47 is arranged on the base, and a plurality of second welding ribbon clamping assemblies 42 are connected to the second welding ribbon assembly spacing slide rail 47 .

[0129] Before all the odd-numbered welding strips are cut, the first welding strip group spacing slide rail 46 is controlled to slide along the offset slide rail 45, so that all the odd-numbered welding strips and all the even-numbered welding strips are offset by a predetermined distance in the first horizontal direction.

[0130] After all the odd-numbered welding strips are cut, a plurality of first welding strip clamping assemblies 41 are controlled to slide apart along the first welding strip group spacing rails 46, so that the spacing between the first welding strip groups is adjusted to the second predetermined spacing. After all the even-numbered welding strips are cut, a plurality of second welding strip clamping assemblies 42 are controlled to slide apart along the second welding strip group spacing rails 47, so that the spacing between the second welding strip groups is adjusted to the second predetermined spacing.

[0131] like Figure 7As shown, optionally, the first welding strip clamping assembly 41 includes a first welding strip head clamping group 411 and a first welding strip tail clamping group 412. When the welding strip is pulled onto the welding strip processing mechanism 40, the first welding strip head clamping group 411 and the first welding strip tail clamping group 412 cooperate to clamp all the odd-numbered welding strips at the corresponding positions. When all the odd-numbered welding strips are cut off, the first welding strip head clamping group 411 clamps the head of the corresponding first welding strip group, and the first welding strip tail clamping group 412 clamps the tail of the corresponding first welding strip group.

[0132] The structure of the second welding strip clamping assembly 42 is the same as that of the first welding strip clamping assembly 41, and includes a second welding strip head clamping assembly and a second welding strip tail clamping assembly. When the welding strip is pulled onto the welding strip processing mechanism 40, the second welding strip head clamping assembly and the second welding strip tail clamping assembly cooperate to clamp all the even-numbered welding strips at the corresponding positions. When all the even-numbered welding strips are cut off, the second welding strip head clamping assembly clamps the head of the corresponding second welding strip group, and the second welding strip tail clamping assembly clamps the tail of the corresponding second welding strip group.

[0133] Optionally, the first welding strip head clamp group 411 and the first welding strip tail clamp group 412 each include a plurality of clamps extending in a second horizontal direction (such as Figure 7 After all the odd-numbered solder strips are cut, each first clamp in the first solder strip head clamp group 411 clamps the head of a first solder strip, and each first clamp in the first solder strip tail clamp group 412 clamps the tail of a first solder strip.

[0134] Similarly, the second welding strip head clamp group and the second welding strip tail clamp group each include a plurality of second clamps arranged along the second horizontal direction. After all the even-numbered welding strips are cut, each second clamp in the second welding strip tail clamp group 412 clamps the head of a second welding strip, and each second clamp in the second welding strip tail clamp group clamps the tail of a second welding strip.

[0135] Optionally, the first welding strip cutter 43 and the second welding strip cutter 44 have the same structure. Taking the first welding strip cutter 43 as an example, Figure 8 As shown, it includes a first mounting bracket 431, a fixed cutter 432, a movable cutter 433 and a movable cutter driving mechanism 434, wherein:

[0136] The fixed cutter 432 is fixedly disposed on the first mounting bracket 431 and extends along the second horizontal direction. A fixed cutting blade is formed at an upper edge of the fixed cutter 432 .

[0137] The movable cutter 433 is slidably arranged on the first mounting bracket 431 and is in contact with the fixed cutter 432. A plurality of hook knives 435 are arranged side by side along the second horizontal direction on the movable cutter 433. The hook knives 435 extend upward from the upper edge of the movable cutter 433, and a movable cutting blade is formed at the lower edge of the hook knives 435.

[0138] The movable cutter driving mechanism 434 is used to drive the movable cutter 433 to slide relative to the fixed cutter 432, so as to realize the position switching of the movable cutter 433 between the high position and the low position. When the movable cutter 433 slides to the high position, a gap for the solder strip to pass through is formed between the movable cutting blade of each hook knife 435 and the fixed cutting blade of the fixed cutter 432. When the movable cutter 433 slides to the low position, the movable cutting blade of each hook knife 435 cooperates with the fixed cutting blade of the fixed cutter 432 to cut off the odd-numbered solder strips passing between the two.

[0139] Since there is an escape space between adjacent hook knives 435 , when the first welding ribbon cutter 43 cuts off all odd-numbered welding ribbons, it can escape all even-numbered welding ribbons that do not need to be cut.

[0140] Similarly, when the second welding ribbon cutter 44 cuts off all the even-numbered welding ribbons, it can avoid all the odd-numbered welding ribbons that do not need to be cut.

[0141] As known to those skilled in the art, the number of the first welding ribbon group and the second welding ribbon group included in the back-connected battery string may be different, for example, Figure 2 As shown, when the battery string is welded by an even number of battery cells (4 in the figure), the number of first welding ribbon groups used (the 1st, 3rd and 5th welding ribbon groups in the figure) is greater than the number of second welding ribbon groups used (the 2nd and 4th welding ribbon groups in the figure).

[0142] In this case, the length of all odd-numbered welding strips pulled out by the welding strip pulling mechanism 30 is longer than the length of all even-numbered welding strips pulled out. That is, when pulling the welding strips, the welding strip pulling mechanism 30 needs to pull all odd-numbered welding strips and all even-numbered welding strips to different welding strip placement stations.

[0143] In order to be able to pull all odd-numbered welding strips and all even-numbered welding strips to different welding strip placement stations, the embodiment of the present invention provides a new welding strip pulling mechanism 30, such as Fig. 9 and Fig.10 As shown, the welding strip pulling mechanism 30 includes a first moving mechanism 31, a second mounting bracket 32, a fixed clamping plate 33, a first driving assembly 34, a second driving assembly 35, and a plurality of first clamping jaws 36 and a plurality of second clamping jaws 37 arranged alternately along a second horizontal direction. Wherein:

[0144] The second mounting bracket 32 ​​is mounted on the movable component of the first moving mechanism 31 , and the first moving mechanism 31 is used to drive the second mounting bracket 32 ​​to move.

[0145] The fixing clamping plate 33 is fixedly connected to the mounting bracket 32 ​​.

[0146] The first driving assembly 34 is disposed on the mounting bracket 32 ​​, and the plurality of first clamps 36 are configured to press all odd-numbered welding ribbons onto the fixing clamp plate 33 under the drive of the first driving assembly 34 .

[0147] The second driving assembly 35 is disposed on the mounting bracket 32 ​​, and the plurality of second clamping jaws 37 are configured to press all the even-numbered welding ribbons onto the fixed clamping plate 33 under the drive of the second driving assembly 35 .

[0148] against Figure 2 In the application scenario shown, that is, the length of all the odd-numbered welding strips pulled out is longer than the length of all the even-numbered welding strips pulled out, the working process of the welding strip pulling mechanism 30 is as follows:

[0149] The first moving mechanism 31 drives the mounting bracket 32 ​​to move to the initial traction position of the welding strip (such as the welding strip cutting position), so that the traction ends of all odd-numbered welding strips and all even-numbered welding strips extend into the fixed clamping plate 33 and are located below the corresponding first clamping jaw 36 or the second clamping jaw 37.

[0150] The first driving assembly 34 and the second driving assembly 35 respectively drive the first clamping jaw 36 and the second clamping jaw 37 to rotate toward the fixed clamping plate 33 , so that all the odd-numbered welding strips and all the even-numbered welding strips are pressed against the fixed clamping plate 33 .

[0151] Next, the first moving mechanism 31 drives the mounting bracket 32 ​​to move to the first welding strip placement position, and the second driving assembly 35 then drives each second clamping jaw 37 to rotate away from the fixed clamping plate 33, and the traction ends of all the even-numbered welding strips detach from the fixed clamping plate 33 and fall to the first welding strip placement position.

[0152] The first moving mechanism 31 drives the control mounting bracket 32 ​​to continue to move to the second welding strip placement position located behind the first welding strip placement position, and the first driving assembly 34 then drives each first clamping jaw 36 to rotate away from the fixed clamping plate 33, and the traction ends of all odd-numbered welding strips break away from the fixed clamping plate 33 and fall to the first welding strip placement position.

[0153] In this way, it can be ensured that the lengths of all odd-numbered welding ribbons pulled out by the welding ribbon pulling mechanism 30 are longer than the lengths of all even-numbered welding ribbons pulled out.

[0154] Of course, the ribbon pulling mechanism 30 can also control the first driving component 34 to perform the release action before the second driving component 35, so that the length of all the even-numbered ribbons pulled out is longer than the length of all the odd-numbered ribbons pulled out. Alternatively, the first driving component 34 and the second driving component 35 can be controlled to perform the release action simultaneously, so that the length of all the even-numbered ribbons pulled out is the same as the length of all the odd-numbered ribbons pulled out, that is, all the even-numbered ribbons and all the odd-numbered ribbons are pulled to the same ribbon placement station.

[0155] Continue to refer Figure 1 As shown, optionally, the battery string welding device provided in the embodiment of the present invention further includes a welding strip unwinding mechanism 70 and a welding strip cutting mechanism 80, wherein: the welding strip unwinding mechanism 70 includes a first mounting plate and a plurality of unwinding trays arranged on the first mounting plate, each unwinding tray supports a roll of welding strip material and unwinds a welding strip. The welding strip unwinding from the unwinding tray is guided into the welding strip cutting mechanism 80. The welding strip pulling mechanism 30 pulls the welding strip from the welding strip cutting mechanism 80 and pulls the welding strip to the welding strip processing mechanism 40.

[0156] When all the odd-numbered welding ribbons and all the even-numbered welding ribbons are pulled to the same welding ribbon placement station or different welding ribbon placement stations by the welding ribbon pulling mechanism 30 , the welding ribbon cutting mechanism 80 cuts the welding ribbons.

[0157] Continue to refer Figure 1 As shown, optionally, the battery string welding equipment provided in the embodiment of the present invention further includes a tooling carrier 90 disposed above the welding strip processing mechanism 40 and configured to be liftable.

[0158] The tool carrier 90 is used to receive and carry a plurality of solder strip pressing tools with a third predetermined spacing, and the solder strip pressing tools are aligned vertically with the first solder strip group and the second solder strip group after spacing on the solder strip processing mechanism 30 according to a predetermined rule.

[0159] When the welding ribbon pulling device 30 and the welding ribbon processing structure 40 are performing welding ribbon pulling and welding ribbon processing, the tooling carrier 90 is at a high position away from the welding ribbon processing mechanism 40 , thereby avoiding the welding ribbon pulling device 30 .

[0160] After the solder strip processing structure 40 completes the solder strip processing, the tool carrier 90 carrying a plurality of solder strip pressing tools carried thereon is lowered to a low position close to the solder strip processing mechanism 40 .

[0161] Next, the solder ribbon laying mechanism 50 moves to the top of the tooling carrier 90, and picks up all the solder ribbon pressing tools, all the first solder ribbon groups and all the second solder ribbon groups from the tooling carrier 90 and the solder ribbon processing mechanism 40, and lays the picked-up solder ribbon pressing tools, first solder ribbon groups and second solder ribbon groups onto the battery cell at one time.

[0162] In this way, the solder ribbon laying mechanism 50 only needs to perform one transporting and laying action, that is, the solder ribbon group and the solder ribbon pressing tool can be simultaneously transported and stacked onto the laid battery cells. After stacking is completed, each solder ribbon pressing tool presses the corresponding solder ribbon group onto the corresponding battery cell.

[0163] like Fig.11 As shown, optionally, the ribbon laying mechanism 50 includes a second moving mechanism, a third mounting bracket 51, a tooling suction portion 52 and a ribbon clamping portion 53, wherein:

[0164] The third mounting bracket 51 is mounted on the movable component of the second moving mechanism, and the second moving mechanism is used to drive the third mounting bracket 51 to move.

[0165] The tooling suction portion 52 and the welding ribbon clamping portion 53 are both mounted on the third mounting bracket 51 .

[0166] When the third mounting bracket 51 is driven by the second moving mechanism to move to the picking station located above the tooling carrier 90, the tooling suction part 52 absorbs a number of soldering strips from the tooling carrier 90 to press the tooling, and the soldering strip clamping part 53 clamps a number of processed first soldering strip groups and a number of second soldering strip groups from the soldering strip processing mechanism 40.

[0167] When the third mounting bracket 51 is driven by the second moving mechanism to move to the laying station located above the welding conveying mechanism 10, the tooling suction part 52 and the solder strip clamping part 53 respectively release a plurality of solder strip pressing tools, a plurality of first solder strip groups and a plurality of second solder strip groups, so that each solder strip pressing tool, each first solder strip group and each second solder strip group are stacked on the corresponding battery cell.

[0168] Continue to refer Figure 1 As shown, optionally, the battery string welding equipment provided in the embodiment of the present invention further includes a tooling circulation conveying mechanism 100, a tooling loading and transporting mechanism 110 and a tooling unloading and transporting mechanism 120, wherein:

[0169] The tooling circulation conveying mechanism 100 is used for circulatively conveying the welding strip pressing tooling.

[0170] The tool loading and transporting mechanism 110 is used to pick up multiple solder ribbon pressing tools from the tool circulating conveying mechanism 100 , and adjust the spacing between the picked up multiple solder ribbon pressing tools to a third predetermined spacing before placing them on the tool carrier 90 .

[0171] The tool unloading and conveying mechanism 120 is used to convey the welding strip pressing tool from the welding conveying mechanism 10 back to the tool circulation conveying mechanism 100 after welding is completed.

[0172] Through the cooperation of the tooling circulation conveying mechanism 100, the tooling loading and transporting mechanism 110 and the tooling unloading and transporting mechanism 120, the present invention realizes the circulation conveying of the welding strip pressing tooling and the automatic loading and unloading.

[0173] like Fig.12 As shown, optionally, the tool loading and handling mechanism 110 includes a third moving mechanism, a fourth mounting bracket 111, a second mounting plate 112, a mounting plate lifting mechanism 113, a plurality of tool adsorption plates 114 and a first spacing driving mechanism 115, wherein:

[0174] The fourth mounting bracket 111 is mounted on a movable component of the third moving mechanism, and the third moving mechanism is used to drive the fourth mounting bracket 111 to move.

[0175] The second mounting plate 112 is slidably connected to the fourth mounting bracket 111 .

[0176] A plurality of tooling adsorption plates 114 are slidably connected side by side to the second mounting plate 112 , and each tooling adsorption plate 114 is used to adsorb a welding ribbon pressing tool.

[0177] The mounting plate lifting mechanism 113 is used to drive the second mounting plate 112 to slide up and down along the fourth mounting bracket 111 to drive each tooling adsorption plate 114 to rise and fall synchronously.

[0178] The first spacing driving mechanism 115 is used to drive each tooling adsorption plate 114 to slide toward the middle or slide toward both sides and separate along the second mounting plate 112, so as to adjust the spacing between the welding strip pressing tools to a third predetermined spacing.

[0179] The working process of the tooling loading and handling mechanism 110 is as follows:

[0180] In the initial state, each tooling adsorption plate 114 is in a close state, and the second mounting plate 112 is in an initial high position.

[0181] The third moving mechanism drives the fourth mounting bracket 111 to move above the tooling circulation conveying mechanism 100, and the mounting plate lifting mechanism 113 drives the second mounting plate 112 to descend to a low position, and each tooling adsorption plate 114 adsorbs a welding strip clamping tool from the tooling circulation conveying mechanism 100.

[0182] The mounting plate lifting mechanism 113 drives the second mounting plate 112 to rise and return to its original position.

[0183] The first spacing driving mechanism 115 drives each tooling adsorption plate 114 to slide apart to both sides until the spacing between each welding strip pressing tooling is adjusted to a third predetermined spacing.

[0184] The third moving mechanism drives the fourth mounting bracket 111 to move above the tooling carrier 90 , and controls each tooling adsorption plate 114 to release the corresponding welding ribbon to press the tooling.

[0185] Continue to refer Figure 1 As shown, the battery string welding equipment in the embodiment of the present invention further includes a battery cell conveying mechanism 130, a battery cell handling mechanism and a battery cell regularization mechanism 140, wherein: the battery cell conveying mechanism 130 is used to input the battery cells to be welded. The battery cell handling mechanism is used to carry the battery cells input by the battery cell conveying mechanism 130 to the battery cell regularization mechanism 140. The battery cell regularization mechanism 140 is used to regularize the battery cells so as to at least adjust the spacing between the battery cells to the first predetermined spacing.

[0186] The battery cell placing mechanism 20 picks up the battery cells whose spacing has been adjusted from the battery cell aligning mechanism 140 , and places the battery cells on the welding conveying mechanism 10 .

[0187] Optionally, a cell rotating mechanism 150 is further provided on the cell conveying mechanism 130. The cell rotating mechanism 150 is used to rotate the cell so that the polarities of the electrode rows of adjacent cell sheets on the same straight line are opposite.

[0188] like Fig.13 As shown, optionally, the battery sheet aligning mechanism 140 includes a mounting seat 141, a plurality of supporting mechanisms 143 and a second spacing driving mechanism 142, wherein:

[0189] A plurality of bearing mechanisms 143 are arranged side by side on the mounting seat 141, and each bearing mechanism 143 is used to carry a battery cell. A second spacing driving mechanism 142 is arranged on the mounting seat 141, and the second spacing driving mechanism 142 is configured to independently drive each bearing mechanism 143 to translate, so as to adjust the spacing between the battery cells carried on the bearing mechanism 143 to a first predetermined spacing.

[0190] The present invention also provides a battery string welding method, which is used to weld battery cells into strings, wherein the back of the battery cells is provided with a first electrode row and a second electrode row arranged in a staggered manner.

[0191] The battery string welding method provided by the present invention can be implemented by the battery string welding equipment described above. Specifically, the battery string welding method provided by the present invention includes:

[0192] A plurality of battery cells with a first predetermined spacing are laid on a welding conveyor mechanism with their backs facing upwards, and the polarities of the electrode rows of adjacent battery cells that are in the same straight line are opposite.

[0193] A plurality of welding ribbons extending along a first horizontal direction are pulled onto a welding ribbon processing mechanism.

[0194] The welding strip processing mechanism is controlled to stagger all odd-numbered welding strips and all even-numbered welding strips by a predetermined distance in the first horizontal direction.

[0195] The welding strip processing mechanism is controlled to alternately cut off all the odd-numbered welding strips and all the even-numbered welding strips to obtain a plurality of first welding strip groups and a plurality of second welding strip groups.

[0196] The welding strip processing mechanism is controlled to adjust the spacing between the first welding strip groups and the spacing between the second welding strip groups to a second predetermined spacing.

[0197] The first welding tape group is stacked on the odd-numbered electrode rows of the corresponding battery cells, and the second welding tape group is stacked on the even-numbered electrode rows of the corresponding battery cells.

[0198] Weld the stacked solder ribbon groups and battery cells into strings.

[0199] As mentioned above, in some embodiments, the battery string includes different numbers of first welding ribbon groups and second welding ribbon groups. Correspondingly, the lengths of all odd-numbered welding ribbons pulled out are different from the lengths of all even-numbered welding ribbons pulled out.

[0200] In view of this, optionally, pulling the plurality of welding ribbons extending along the first horizontal direction onto the welding ribbon processing mechanism includes:

[0201] A plurality of welding ribbons extending along a first horizontal direction are pulled to a first welding ribbon placement position, and all odd-numbered welding ribbons are released so that all odd-numbered welding ribbons fall onto a welding ribbon processing mechanism.

[0202] All the even-numbered welding ribbons are further pulled to the second welding ribbon placement position located behind the first welding ribbon placement, and all the even-numbered welding ribbons are released so that all the even-numbered welding ribbons fall onto the welding ribbon processing mechanism.

[0203] Pulling a plurality of welding ribbons extending along a first horizontal direction to a first welding ribbon placement position, releasing all even-numbered welding ribbons, so that all even-numbered welding ribbons fall onto the welding ribbon processing mechanism;

[0204] All the odd-numbered welding ribbons are further pulled to the second welding ribbon placement position located behind the first welding ribbon placement, and all the odd-numbered welding ribbons are released so that all the odd-numbered welding ribbons fall onto the welding ribbon processing mechanism.

[0205] The present invention has been described in sufficient detail with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A battery string welding device, used for welding battery cells into strings, wherein the back of the battery cell is provided with a first electrode row and a second electrode row arranged alternately, characterized in that: The battery string welding equipment includes a welding conveying mechanism, a battery cell laying mechanism, a welding strip pulling mechanism, a welding strip processing mechanism, a welding strip laying mechanism and a welding mechanism, wherein: The welding conveying mechanism is used at least to carry the battery sheet and the welding ribbon group; The cell laying mechanism is used to lay a plurality of cell sheets with a first predetermined spacing on the welding conveying mechanism with their backs facing upwards, and the polarities of the electrode rows of adjacent cell sheets on the same straight line are opposite; The welding ribbon pulling mechanism is used to pull a plurality of welding ribbons extending along a first horizontal direction onto the welding ribbon processing mechanism; The welding strip processing mechanism is used to stagger all odd welding strips and all even welding strips by a predetermined distance in the first horizontal direction, and alternately cut all odd welding strips and all even welding strips to obtain a plurality of first welding strip groups and a plurality of second welding strip groups, and the welding strip processing mechanism is also used to adjust the spacing between each first welding strip group and the spacing between each second welding strip group to a second predetermined spacing; The welding tape laying mechanism is used to stack the plurality of the first welding tape groups and the plurality of the second welding tape groups on the welding tape processing mechanism onto the plurality of laid battery cells, and each of the first welding tape groups is stacked onto the odd-numbered electrode rows of the corresponding battery cell, and each of the second welding tape groups is stacked onto the even-numbered electrode rows of the corresponding battery cell; The welding mechanism is used to weld the stacked welding ribbon groups and battery cells into a string.

2. The battery string welding device according to claim 1, characterized in that: The solder strip processing mechanism includes a plurality of first solder strip clamping assemblies, a plurality of second solder strip clamping assemblies, a plurality of first solder strip cutters and a plurality of second solder strip cutters arranged along the first direction, wherein: A plurality of the first welding strip clamping assemblies cooperate to clamp all the odd-numbered welding strips, a first welding strip cutter is disposed between each adjacent first welding strip clamping assemblies, and each first welding strip cutter is used to cut off all the odd-numbered welding strips at a corresponding position to obtain a plurality of the first welding strip groups; A plurality of the second welding strip clamping assemblies cooperate to clamp all the even-numbered welding strips, a second welding strip cutter is arranged between each adjacent second welding strip clamping assemblies, and each second welding strip cutter is used to cut all the even-numbered welding strips at a corresponding position to obtain a plurality of the second welding strip groups; Before all the odd-numbered welding strips are cut, a plurality of the first welding strip clamping assemblies and / or a plurality of the second welding strip clamping assemblies are translated in the first horizontal direction so that all the odd-numbered welding strips and all the even-numbered welding strips are staggered by a predetermined distance in the first horizontal direction; After all the odd-numbered solder strips are cut, each of the first solder strip clamping assemblies clamps a corresponding first solder strip group, and each of the first solder strip clamping assemblies is further configured to separate in the first horizontal direction to adjust the spacing between each of the first solder strip groups to the second predetermined spacing; After all the even-numbered solder strips are cut, each of the second solder strip clamping assemblies clamps a corresponding second solder strip group respectively, and each of the second solder strip clamping assemblies is also configured to separate in the first horizontal direction to adjust the spacing between each of the second solder strip groups to the second predetermined spacing.

3. The battery string welding device according to claim 2, characterized in that: The welding strip processing mechanism further includes a base and a dislocation slide rail extending along the first horizontal direction, a first welding strip group spacing slide rail and a second welding strip group spacing slide rail, wherein: The dislocation slide rail is arranged on the base, the first welding strip group spacing slide rail is slidably connected to the dislocation slide rail, and a plurality of the first welding strip clamping assemblies are connected to the first welding strip group spacing slide rail; The second welding strip assembly spacing slide rail is arranged on the base, and a plurality of the second welding strip clamping assemblies are connected to the second welding strip assembly spacing slide rail; Before all the odd-numbered welding strips are cut, the first welding strip group spacing slide rail slides along the offset slide rail so that all the odd-numbered welding strips and all the even-numbered welding strips are offset by a predetermined distance in the first horizontal direction; After all the odd-numbered welding strips are cut, a plurality of the first welding strip clamping assemblies slide apart along the first welding strip group spacing rails to adjust the spacing between the first welding strip groups to a second predetermined spacing; After all the even-numbered welding strips are cut, a plurality of the second welding strip clamping assemblies slide apart along the second welding strip group spacing rails to adjust the spacing between the second welding strip groups to a second predetermined spacing.

4. The battery string welding equipment according to claim 2, characterized in that: The first welding strip cutter and the second welding strip cutter each include a first mounting bracket, a fixed cutter, a movable cutter and a movable cutter driving mechanism, wherein: The fixed cutter is fixedly arranged on the first mounting bracket and extends along the second horizontal direction, and a fixed cutting blade is formed at the upper edge of the fixed cutter; The movable cutter is slidably arranged on the first mounting bracket and is in contact with the fixed cutter. A plurality of hook knives are arranged side by side on the movable cutter along the second horizontal direction. The hook knives extend upward from the upper edge of the movable cutter, and a movable cutting blade is formed at the lower edge of the hook knives. The movable cutter driving mechanism is used to drive the movable cutter to slide relative to the fixed cutter, so as to realize the position switching of the movable cutter between the high position and the low position; When the movable cutter slides to the high position, a gap is formed between the movable cutting blade of each hook knife and the fixed cutting blade of the fixed cutter for the welding strip to pass through; when the movable cutter slides to the low position, the movable cutting blade of each hook knife cooperates with the fixed cutting blade of the fixed cutter to cut off the welding strip passing between the two.

5. The battery string welding equipment according to claim 1, characterized in that: The welding ribbon traction mechanism includes a first moving mechanism, a second mounting bracket, a fixed clamping plate, a first driving assembly, a second driving assembly, and a plurality of first clamping jaws and a plurality of second clamping jaws staggered along a second horizontal direction perpendicular to the first horizontal direction, wherein: The second mounting bracket is mounted on a movable component of the first moving mechanism, and the first moving mechanism is used to drive the second mounting bracket to move; The fixing clamp is fixedly connected to the mounting bracket; The first driving assembly is disposed on the mounting bracket, and the first clamping jaws are configured to press all odd-numbered welding strips onto the fixed clamping plate under the drive of the first driving assembly; The second driving assembly is disposed on the mounting bracket, and the plurality of second clamps are configured to press all the even-numbered welding ribbons onto the fixed clamping plate under the drive of the second driving assembly.

6. The battery string welding equipment according to claim 1, characterized in that: The battery string welding equipment also includes a welding ribbon unwinding mechanism and a welding ribbon cutting mechanism, wherein: The solder strip unwinding mechanism comprises a first mounting plate and a plurality of unwinding trays arranged on the first mounting plate, each of the unwinding trays respectively supports a solder strip roll and unwinds a solder strip; The welding strip discharged from the discharge tray is guided into the welding strip cutting mechanism; The welding ribbon pulling mechanism pulls the welding ribbon from the welding ribbon cutting mechanism and pulls the welding ribbon to the welding ribbon processing mechanism; The welding ribbon cutting mechanism cuts the pulled welding ribbon.

7. The battery string welding equipment according to claim 1, characterized in that: The battery string welding equipment also includes a tooling carrier frame disposed above the welding strip processing mechanism and configured to be liftable; The tool carrier is used to receive and carry a plurality of welding ribbon pressing tools with a third predetermined spacing, and the welding ribbon pressing tools are aligned vertically with the first welding ribbon group and the second welding ribbon group after spacing on the welding ribbon processing mechanism according to a predetermined rule; The solder tape laying mechanism simultaneously picks up a plurality of the first solder tape groups, a plurality of the second solder tape groups and a plurality of the solder tape pressing tools, and lays the picked-up plurality of the first solder tape groups, a plurality of the second solder tape groups and a plurality of the solder tape pressing tools on a plurality of the battery cells.

8. The battery string welding device according to claim 7, characterized in that: The welding tape laying mechanism includes a second moving mechanism, a third mounting bracket, a tooling suction part and a welding tape clamping part, wherein: The third mounting bracket is mounted on the movable component of the second moving mechanism, and the second moving mechanism is used to drive the third mounting bracket to move; The tooling suction part and the welding ribbon clamping part are both mounted on the third mounting bracket; When the third mounting bracket is driven by the second moving mechanism to move to the picking station located above the tooling carrier, the tooling suction part sucks a plurality of the welding tape pressing tools from the tooling carrier, and the welding tape clamping part clamps a plurality of the first welding tape groups and a plurality of the second welding tape groups from the welding tape processing mechanism; When the third mounting bracket is driven by the second moving mechanism to move to the placement station above the welding conveying mechanism, the tooling suction part and the welding tape clamping part release the plurality of welding tape pressing tools, the plurality of the first welding tape groups and the plurality of the second welding tape groups.

9. The battery string welding device according to claim 7, characterized in that: The battery string welding equipment also includes a tooling circulation conveying mechanism, a tooling loading and transporting mechanism, and a tooling unloading and transporting mechanism, wherein: The tooling circulation conveying mechanism is used for circulatively conveying the welding strip pressing tooling; The tool loading and transporting mechanism is used to pick up a plurality of welding ribbon pressing tools from the tool circulating conveying mechanism, and adjust the spacing between the picked-up plurality of welding ribbon pressing tools to the third predetermined spacing and then place them on the tool bearing frame; The tool unloading and conveying mechanism is used to convey the welding strip pressing tool from the welding conveying mechanism back to the tool circulation conveying mechanism after welding is completed.

10. The battery string welding device according to claim 9, characterized in that: The tool loading and handling mechanism includes a third moving mechanism, a fourth mounting bracket, a second mounting plate, a mounting plate lifting mechanism, a plurality of tool adsorption plates and a first spacing driving mechanism, wherein: The fourth mounting bracket is mounted on the movable component of the third moving mechanism, and the third moving mechanism is used to drive the fourth mounting bracket to move; The second mounting plate is slidably connected to the fourth mounting bracket; A plurality of the tooling adsorption plates are slidably connected side by side on the second mounting plate, and each of the tooling adsorption plates is used to adsorb a welding strip pressing tool; The mounting plate lifting mechanism is used to drive the second mounting plate to slide up and down along the fourth mounting bracket to drive each of the tooling adsorption plates to rise and fall synchronously; The first spacing driving mechanism is used to drive each of the tooling adsorption plates to slide toward the middle or slide toward both sides and separate along the second mounting plate, so as to adjust the spacing between the welding strip pressing tools to the third predetermined spacing.

11. The battery string welding device according to claim 1, characterized in that: The battery string welding equipment also includes a battery cell conveying mechanism, a battery cell handling mechanism and a battery cell arranging mechanism, wherein: The battery cell conveying mechanism is used to input the battery cells to be welded; The battery cell transport mechanism is used to transport the battery cells input by the battery cell conveying mechanism to the battery cell arranging mechanism; The battery cell aligning mechanism is used to implement aligning of the battery cells, so as to at least adjust the spacing between the battery cells to the first predetermined spacing.

12. The battery string welding device according to claim 11, characterized in that: The battery sheet conveying mechanism is also provided with a battery sheet rotating mechanism; The battery cell rotating mechanism is used to rotate the battery cells so that the polarities of the electrode rows of adjacent battery cells that are on the same straight line are opposite.

13. The battery string welding device according to claim 11, characterized in that: The battery sheet regularization mechanism includes a mounting seat, a plurality of bearing mechanisms and a second spacing driving mechanism, wherein: A plurality of the carrying mechanisms are arranged side by side on the mounting seat, and each of the carrying mechanisms is used to carry a battery sheet; The second spacing driving mechanism is disposed on the mounting seat, and is configured to independently drive each of the supporting mechanisms to translate, so as to adjust the spacing between the battery sheets supported on the supporting mechanisms to the first predetermined spacing.

14. A battery string welding method for welding battery cells into a string, wherein the back of the battery cell is provided with a first electrode row and a second electrode row arranged in a staggered manner, characterized in that: The battery string welding method is implemented by the battery string welding device according to any one of claims 1 to 13, and the battery string welding method comprises: Laying a plurality of battery cells with a first predetermined spacing on the welding conveyor mechanism with their backs facing upward, wherein the polarities of the electrode rows of adjacent battery cells on the same straight line are opposite; Pulling a plurality of welding ribbons extending along a first horizontal direction onto the welding ribbon processing mechanism; Control the welding strip processing mechanism to stagger all odd-numbered welding strips and all even-numbered welding strips by a predetermined distance in the first horizontal direction; Controlling the welding strip processing mechanism to alternately cut off all odd-numbered welding strips and all even-numbered welding strips to obtain a plurality of first welding strip groups and a plurality of second welding strip groups; Controlling the solder strip processing mechanism to adjust the spacing between the first solder strip groups and the spacing between the second solder strip groups to a second predetermined spacing; Controlling the welding tape laying mechanism to stack the first welding tape group on the odd-numbered electrode rows of the corresponding battery cells that have been laid, and to stack the second welding tape group on the even-numbered electrode rows of the corresponding battery cells that have been laid; Weld the stacked solder ribbon groups and battery cells into strings.

15. The battery string welding method according to claim 14, characterized in that: The step of pulling a plurality of welding ribbons extending along the first horizontal direction onto the welding ribbon processing mechanism comprises: Pulling a plurality of welding ribbons extending along the first horizontal direction to a first welding ribbon placement position, releasing all odd-numbered welding ribbons, so that all odd-numbered welding ribbons fall onto the welding ribbon processing mechanism; Continue to pull all the even-numbered welding ribbons to a second welding ribbon placement position located behind the first welding ribbon placement, release all the even-numbered welding ribbons, and make all the even-numbered welding ribbons fall onto the welding ribbon processing mechanism; or Pulling a plurality of welding ribbons extending along the first horizontal direction to a first welding ribbon placement position, releasing all even-numbered welding ribbons, so that all even-numbered welding ribbons fall onto the welding ribbon processing mechanism; All the odd-numbered welding ribbons are further pulled to a second welding ribbon placement position located behind the first welding ribbon placement, and all the odd-numbered welding ribbons are released so that all the odd-numbered welding ribbons fall onto the welding ribbon processing mechanism.

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