Tab Welding System

Abstract

An embodiment of the present invention relates to the field of soft-pack battery processing, and discloses a tab welding system, including: a soft-pack battery module positioning device, a tab pressing device, and a tab welding device; the tab pressing assembly includes a slidable pressing assembly mounting plate, two symmetrically arranged telescopic cylinders, two symmetrically arranged tab pressing heads, and two symmetrically arranged pressing head sliders; the fixed ends of the two telescopic cylinders are both hinged to the pressing assembly mounting plate, the movable end of one telescopic cylinder is hinged to one pressing head slider, and the movable end of the other telescopic cylinder is hinged to the other pressing head slider; the two pressing head sliders are both slidably mounted on the pressing assembly mounting plate, and the sliding direction of the pressing head slider is perpendicular to that of the pressing assembly mounting plate; the tab pressing head is mounted on the pressing head slider. The tab welding system provided by the embodiment of the present invention has a simple structure, is convenient to use, the bus bar and the tab can be effectively contacted after welding, the welding effect is good, and the quality of the soft-pack battery cell module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack battery processing, and particularly to an ear welding system. Background Art

[0002] Soft-pack batteries are widely used in various fields such as electric bicycles, electric motorcycles, electric vehicles, solar photovoltaic power generation systems, wind power generation systems, mobile communication base stations, backup UPS power supplies for large servers, emergency lighting, portable mobile power supplies, and mine safety equipment due to their advantages of being thin and light, having a long cycle life, good safety performance, high energy density, stable discharge, excellent performance, and being environmentally friendly and pollution-free.

[0003] The battery module of a power battery is formed by connecting a plurality of single cells in series and parallel through conductive connectors. Ear tabs for conducting electricity are provided on the single cells, and a bus bar, as a common conductive connector, is used to electrically connect the ear tabs on different single cells. Commonly, the connection methods between the ear tabs and the conductive connectors are welding, screwing, and mechanical repulsion connection.

[0004] Since the battery module is formed by connecting a plurality of single cells in series and parallel through conductive connectors, most soft-pack batteries on the market achieve series and parallel connections between single cells through bus bars. Existing ear tab welding equipment is likely to cause the bus bar after welding to fail to effectively contact the ear tab, resulting in poor welding effects. Summary of the Invention

[0005] Embodiments of the present invention provide an ear welding system to solve or partially solve the problem of poor existing ear tab welding effects.

[0006] Embodiments of the present invention provide an ear welding system, including: a soft-pack battery module positioning device for positioning a soft-pack battery module, an ear tab pressing device for making the ear tab and the bus bar fit together, and an ear tab welding device for welding the ear tab and the bus bar;

[0007] The ear tab pressing device includes an ear tab pressing assembly, and the ear tab pressing assembly includes a slidable pressing assembly mounting plate, two symmetrically arranged telescopic cylinders, two symmetrically arranged ear tab pressing heads, and two symmetrically arranged pressing head sliders;

[0008] The fixed ends of the two telescopic cylinders are both hinged to the pressing assembly mounting plate, the movable end of one telescopic cylinder is hinged to one pressing head slider, and the movable end of the other telescopic cylinder is hinged to the other pressing head slider; the two pressing head sliders are both slidably mounted on the pressing assembly mounting plate, and the sliding direction of the pressing head slider is perpendicular to that of the pressing assembly mounting plate; one ear tab pressing head is mounted on one pressing head slider, and the other ear tab pressing head is mounted on the other pressing head slider.

[0009] Based on the above technical solution, the tab pressing device further includes a first displacement sensor for detecting the displacement of one of the tab pressing heads and a third displacement sensor for detecting the displacement of the other tab pressing head.

[0010] Based on the above technical solution, the tab pressing device further includes a second displacement sensor for detecting the distance between the tab and the bus bar plate.

[0011] Based on the above technical solution, the tab welding system further includes two groups of dust extraction components. Each dust extraction component includes a dust extraction pipe, and each tab pressing head is provided with an air extraction through hole; the intake end of one of the dust extraction pipes installed on one of the tab pressing heads is arranged facing the air extraction through hole, and the intake end of the other dust extraction pipe installed on the other tab pressing head is arranged facing the air extraction through hole.

[0012] Based on the above technical solution, each tab pressing head with a hollow structure is correspondingly provided with a plurality of air blowing holes at the air extraction through hole.

[0013] Based on the above technical solution, the soft-pack battery module positioning device includes a first module clamping component and a second module clamping component for clamping the soft-pack battery module from different directions;

[0014] The first module clamping component includes a positioning cylinder and a pressing cylinder. The movable end of the positioning cylinder is sequentially connected with a positioning side pressing block and a positioning side cushion block, and the movable end of the pressing cylinder is sequentially connected with a pressing side pressing block and a pressing side cushion block; the second module clamping component includes a jaw cylinder, and the two sides of the jaw cylinder are provided with symmetrically arranged first jaws and second jaws.

[0015] Based on the above technical solution, both the first jaw and the second jaw include an L-shaped connecting plate connected to the movable end of the jaw cylinder and an inverted U-shaped plate connected to the L-shaped connecting plate.

[0016] Based on the above technical solution, the soft-pack battery module positioning device further includes a tooling plate for placing the soft-pack battery module. The tooling plate includes a base plate and module support bars located on the base plate. Symmetrically arranged module side limit blocks and module side clamping blocks are respectively installed on the opposite side surfaces of the module support bars, and both the module side limit blocks and the module side clamping blocks are in an L-shaped structure.

[0017] Based on the above technical solution, the soft-pack battery module positioning device further includes a belt conveyor for conveying the tooling plate.

[0018] Based on the above technical solutions, the tab welding device includes a welding assembly, and the welding assembly includes a galvanometer welding head, an image acquisition module, a first slide table, and a second slide table;

[0019] The second slide table is installed on the first slide table, the galvanometer welding head is installed on the second slide table, and the moving directions of the first slide table and the second slide table are perpendicular to each other; the image acquisition module is installed on the first slide table through a lifting member.

[0020] A tab welding system provided by an embodiment of the present invention first positions a soft-pack battery module through a soft-pack battery module positioning device; after positioning is completed, the pressing head slide moves to the working area by sliding the pressing component mounting plate; after the pressing head slide is adjusted, the tab pressing head moves towards the tab through the operation of the telescopic cylinder, so that the tab pressing head presses the tab tightly; finally, the tab and the bus bar are welded through the tab welding device to complete the tab welding. The tab welding system provided by the embodiment of the present invention has a simple structure, is easy to use, the bus bar and the tab can be effectively contacted after welding, the welding effect is good, and the quality of the soft-pack battery cell module is improved. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the tab welding system according to the embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the welding assembly according to the embodiment of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the tab pressing assembly according to the embodiment of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the dust extraction assembly according to the embodiment of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the soft-pack battery module positioning device according to the embodiment of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the first module clamping assembly according to the embodiment of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the tooling plate according to the embodiment of the present invention.

[0029] Reference Signs:

[0030] 1. Welding assembly; 11. Galvo welding head; 12. Camera; 13. Air curtain; 2. Tab pressing assembly; 201. Pressing assembly mounting plate; 202. Cylinder mounting seat; 203. Telescopic cylinder; 204. First displacement sensor; 205. Second displacement sensor; 206. Tab press head; 207. Press head sliding seat; 208. Flap; 209. Press head sliding seat mounting seat; 210. Dust extraction assembly; 2101. Dust extraction pipe; 2102. Pipe joint; 2103. Dust extraction pipe support; 2104. Fixed block; 2105. Air extraction through hole; 2106. Air blowing hole; 3. Box body; 4. Soft-pack battery module positioning device; 41. First module clamping assembly; 411. Pressing cylinder; 412. Pressing side pressing block; 413. Pressing side cushion block; 414. Positioning cylinder; 415. Positioning side pressing block; 416. Positioning side cushion block; 42. Second module clamping assembly; 43. Soft-pack battery module; 44. Belt conveyor; 45. Tooling plate; 451. Substrate; 452. Module support bar; 453. Module side limit block; 454. Module side clamping block; 455. Roller. Detailed Embodiment

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] A battery module includes a plurality of single cells. Each single cell has a positive electrode and a negative electrode. The tabs are metal conductors that lead out the positive and negative electrodes from the single cells. A plurality of single cells are connected in series and parallel to form a battery module. The series and parallel connections between the single cells are achieved through conductors. Commonly, a bus bar is used as the conductive connection component, and the tabs on different single cells are electrically connected to the bus bar, thereby realizing the series and parallel connections between the single cells.

[0033] Figure 1 For the structural schematic diagram of the tab welding system according to the embodiment of the present invention, as Figure 1 shown, the tab welding system according to the embodiment of the present invention includes: a soft-pack battery module positioning device 4 for positioning the soft-pack battery module, a tab pressing device for making the tabs and the bus bar fit together, and a tab welding device for welding the tabs and the bus bar;

[0034] As Figure 3As shown in the figure, the tab pressing device includes a tab pressing assembly 2. The tab pressing assembly 2 includes a slidable pressing assembly mounting plate 201, two symmetrically arranged telescopic cylinders 203, two symmetrically arranged tab pressing heads 206, and two symmetrically arranged pressing head sliders 207.

[0035] The fixed ends of the two telescopic cylinders 203 are both hinged to the pressing assembly mounting plate 201. The movable end of one telescopic cylinder 203 is hinged to one pressing head slider 207, and the movable end of the other telescopic cylinder 203 is hinged to the other pressing head slider 207.

[0036] The two pressing head sliders 207 are both slidably mounted on the pressing assembly mounting plate 201, and the sliding direction of the pressing head slider 207 is perpendicular to that of the pressing assembly mounting plate 201. One tab pressing head 206 is mounted on one pressing head slider 207, and the other tab pressing head 206 is mounted on the other pressing head slider 207.

[0037] It should be noted that through the independent driving of the two telescopic cylinders 203 and the independent sliding of the two pressing head sliders 207, the two tab pressing heads 206 can work independently, so as to adapt to soft-pack battery modules of different specifications.

[0038] It can be understood that the sliding direction of the pressing head slider 207 is perpendicular to that of the pressing assembly mounting plate 201, that is, the pressing assembly mounting plate 201 slides along the X-axis direction, and the pressing head slider 207 slides along the Y-axis direction. Among them, the pressing assembly mounting plate 201 is part of the third sliding table. The power mechanism of the third sliding table is a ball screw, and the power source of the ball screw can be a servo motor. The third sliding table can be installed and fixed through two vertically arranged brackets. The height of the brackets can make the position of the tab pressing head 206 match the position of the tab. The power source of the pressing head slider 207 is the telescopic cylinder 203. Through the extension movement of the telescopic cylinder 203, the tab pressing head 206 moves towards the tab, and through the shortening movement of the telescopic cylinder 203, the tab pressing head 206 moves away from the tab.

[0039] It can be understood that the rectangular tab pressing head 206 matches the tab, that is, the shape and size of the tab pressing head 206 are the same as those of the tab. Among them, in order to facilitate the replacement and maintenance of the tab pressing head 206, the tab pressing head 206 is detachably mounted on the pressing head slider 207. For example, the tab pressing head 206 is mounted on the pressing head slider 207 by means of snap connection.

[0040] In the embodiment of the present invention, first, the soft-pack battery module is positioned by the soft-pack battery module positioning device 4; after the positioning is completed, the sliding of the pressing component mounting plate 201 causes the indenter slide 207 to move to the working area; after the adjustment of the indenter slide 207 is completed, the telescopic cylinder 203 works to make the tab indenter 206 move towards the tab, so that the tab indenter 206 presses the tab; finally, the tab and the bus bar are welded by the tab welding device to complete the tab welding. The tab welding system provided by the embodiment of the present invention has a simple structure, is easy to use, the bus bar and the tab can be effectively contacted after welding, the welding effect is good, and the quality of the soft-pack battery cell module is improved.

[0041] On the basis of the above embodiment, the tab indenter 206 is made of copper.

[0042] It should be noted that, due to the high instantaneous temperature during the pressing and welding process. The tab indenter 206 presses the tab and the bus bar tightly together. Since copper has good thermal conductivity, its heat dissipation effect is better, ensuring the quality and effect of welding.

[0043] As Figure 4 shown, the tab welding system further includes two sets of dust extraction components 210. Each dust extraction component 210 includes a dust extraction pipe 2101. An air extraction through hole 2105 is opened on each tab indenter 206; the intake end of a dust extraction pipe 2101 installed on one tab indenter 206 is arranged towards the air extraction through hole 2105, and the intake end of the other dust extraction pipe 2101 installed on the other tab indenter 206 is arranged towards the air extraction through hole 2105.

[0044] It should be noted that the air extraction through hole 2105 penetrating through two opposite side surfaces is opened on the tab indenter 206, and an air extractor can be installed at the outlet end of the dust extraction pipe 2101.

[0045] In the embodiment of the present invention, during the tab welding, the welding fumes enter the air extraction through hole 2105 and are discharged by the dust extraction pipe 2101; after the tab welding is completed, the telescopic cylinder 203 works to make the tab indenter 206 move away from the tab. Among them, by pressing the tab and the bus bar tightly with the tab indenter, the movement of the bus bar during the welding process can be prevented, improving the stability of the welding process and the accuracy of welding; the welding fumes are discharged in time, improving the welding quality.

[0046] On the basis of the above embodiment, the hollow-structured tab indenter 206 is correspondingly provided with a plurality of air blowing holes 2106 at the air extraction through hole 2105.

[0047] It should be noted that in order to protect the tab and the bus bar, during welding, a protective gas, such as nitrogen, is provided through the air blowing hole 2106. Among them, a pipe joint 2102 for installing a pipe is installed on the tab punch 206, and the nitrogen transported through the pipe finally flows out from the air blowing hole 2106.

[0048] It can be understood that the tab punch 206 is installed on the punch slide 207 through the fixing block 2104, and the dust extraction pipe 2101 is fixed on the fixing block 2104 through the dust extraction pipe bracket 2103.

[0049] Based on the above embodiments, the tab pressing device further includes a cylinder mounting seat 202 installed on the pressing component mounting plate 201, and the fixed end of the telescopic cylinder 203 is hinged to the cylinder mounting seat 202.

[0050] It should be noted that in order to improve the working stability of the telescopic cylinder 203, the fixed end of the telescopic cylinder 203 is hinged to the cylinder mounting seat 202 through a rotating shaft. Among them, the cylinder mounting seat 202 is detachably installed on the pressing component mounting plate 201.

[0051] Based on the above embodiments, the tab pressing device further includes a punch slide mounting seat 209 installed on the pressing component mounting plate 201, and the punch slide 207 is slidably installed on the punch slide mounting seat 209.

[0052] It should be noted that in order to achieve a sliding connection, a guide rail is provided on the punch slide mounting seat 209, and a groove adapted to the guide rail is provided at the bottom of the punch slide 207, so as to achieve the sliding connection between the two. Among them, the punch slide mounting seat 209 is detachably installed on the pressing component mounting plate 201.

[0053] It can be understood that the punch slide mounting seat 209 and the cylinder mounting seat 202 are respectively located at both ends of the pressing component mounting plate 201.

[0054] Based on the above embodiments, a stop piece 208 for limiting the sliding distance of the punch slide 207 is installed on the end face of the punch slide mounting seat 209.

[0055] It should be noted that the stop piece 208 is located on the movement path of the punch slide 207. By arranging the stop piece 208, the punch slide 207 can be prevented from sliding off the punch slide mounting seat 209.

[0056] Based on the above embodiments, the tab pressing device further includes a first displacement sensor 204 for detecting the displacement of the tab punch 206.

[0057] It should be noted that the first displacement sensor 204 is installed on the pressing component mounting plate 201, and the first displacement sensor 204 is located between the cylinder mounting seat 202 and the indenter slide mounting seat 209. The sliding distance of the indenter slide 207 can be obtained through the first displacement sensor 204, so as to obtain the displacement of the tab indenter 206.

[0058] Based on the above embodiments, the tab pressing device further includes a second displacement sensor 205 for detecting the distance between the tab and the bus bar.

[0059] It should be noted that the second displacement sensor 205 is installed on the pressing component mounting plate 201, and the second displacement sensor 205 is located between the cylinder mounting seat 202 and the indenter slide mounting seat 209. The distance between the second displacement sensor 205 and the bus bar can be obtained. Combining with the displacement of the tab indenter 206 obtained by the first displacement sensor 204, the distance between the tab and the bus bar can be calculated, which can prevent the tab indenter 206 from over-pressing the tab and causing damage to the battery cell module.

[0060] As Figure 2 shown, the tab welding device includes a welding assembly 1, and the welding assembly 1 includes a galvanometer welding head 11, an image acquisition module, a first slide table, and a second slide table;

[0061] The second slide table is installed on the first slide table, the galvanometer welding head 11 is installed on the second slide table, and the moving directions of the first slide table and the second slide table are perpendicular to each other, that is, the first slide table is used to move along the X-axis direction, that is, move left and right, and the second slide table is used to move along the Y-axis direction, that is, move forward and backward; the image acquisition module is installed on the first slide table through a lifting member. Among them, the lifting member can be a fourth slide table. The fourth slide table is installed on the first slide table, and the image acquisition module is installed on the fourth slide table. The fourth slide table drives the image acquisition module to move along the Z-axis direction, that is, move up and down, that is, the image acquisition module moves closer to or farther away from the first slide table.

[0062] It should be noted that the image acquisition module includes a camera 12 and a light source arranged close to the camera 12.

[0063] In the embodiments of the present invention, through the coordinated work of the first slide table and the second slide table, the galvanometer welding head 11 is driven to the welding station. At the same time, through the coordinated work of the first slide table and the lifting member, the image acquisition module is driven to perform a figure-eight movement, and the real-time image of the weld can be obtained, which is convenient for completing the real-time detection of the weld, so as to timely adjust the working parameters of the galvanometer welding head 11. Among them, the galvanometer welding head is adopted, which has a simple structure and is easy to use. After welding, the bus bar and the tab can be effectively contacted, and the welding effect is good, improving the quality of the battery cell module.

[0064] Based on the above embodiments, as Figure 2As shown, the welding assembly 1 further includes an air curtain 13 mounted on the second sliding table. The air curtain 13 is located above the galvanometer welding head 11.

[0065] It should be noted that the protective gas blown out by the air curtain 13 makes there be no debris on the welding path of the galvanometer welding head 11, which can improve the working efficiency and welding quality of the galvanometer welding head 11. Among them, the protective gas can be nitrogen.

[0066] As Figure 5 shown, the soft-pack battery module positioning device 4 includes a first module clamping assembly 41 and a second module clamping assembly 42 for clamping the soft-pack battery module 43 from different orientations; the first module clamping assembly 41 is used to clamp the left and right sides of the soft-pack battery module 43, and the second module clamping assembly 42 is used to clamp the front and back sides of the soft-pack battery module 43;

[0067] As Figure 6 shown, the first module clamping assembly includes a positioning cylinder 414 and a pressing cylinder 411. The movable end of the positioning cylinder 414 is sequentially connected with a positioning side pressing block 415 and a positioning side cushion block 416, and the movable end of the pressing cylinder 411 is sequentially connected with a pressing side pressing block 412 and a pressing side cushion block 413; the second module clamping assembly 42 includes a jaw cylinder, and a first jaw and a second jaw are symmetrically arranged on both sides of the jaw cylinder.

[0068] It should be noted that the positioning cylinder 414 is a cylinder with adjustable stroke. One side of the positioning cylinder 414 is used as the positioning side, and one side of the pressing cylinder 411 is used as the pressing side. The positioning cylinder 414 can finely adjust the position of the positioning side cushion block 416 to match the incoming material position; and each time the pressing cylinder 411 works, the pressing side cushion block 413 is at the maximum stroke position.

[0069] It can be understood that the jaw cylinder is located above the soft-pack battery module 43. When working, the soft-pack battery module 43 is clamped by the opposite movement of the first jaw and the second jaw. Among them, the first jaw can be used as the pressing side, and the second jaw can be used as the positioning side to match the incoming material position. Among them, both the first jaw and the second jaw are made of insulating materials, and both the first jaw and the second jaw have a certain flexibility.

[0070] In the embodiment of the present invention, by using the first jaw and the pressing side cushion block 413 as the pressing side, and the second jaw and the positioning side cushion block 416 as the positioning side, the position of the soft-pack battery module 43 can be finely adjusted, so as to facilitate the next ear welding operation of the soft-pack battery module 43.

[0071] On the basis of the above embodiment, both the positioning side cushion block 416 and the pressing side cushion block 413 are made of polyurethane.

[0072] It should be noted that, in order to ensure the safety of the positioning side cushion block 416 and the pressing side cushion block 413 when clamping the soft-pack battery module 43, both the positioning side cushion block 416 and the pressing side cushion block 413 are made of insulating materials, and both the positioning side cushion block 416 and the pressing side cushion block 413 have a certain degree of flexibility.

[0073] Based on the above embodiments, both the first jaw and the second jaw include an L-shaped connecting plate connected to the movable end of the jaw cylinder, and an inverted U-shaped plate connected to the L-shaped connecting plate.

[0074] It should be noted that both the L-shaped connecting plate and the inverted U-shaped plate are made of polyurethane.

[0075] In the embodiments of the present invention, when the first jaw and the second jaw clamp the soft-pack battery module 43, the horizontal portion of the L-shaped connecting plate contacts the top surface of the soft-pack battery module 43, and the inverted U-shaped plate contacts the front and rear side surfaces of the soft-pack battery module 43. Among them, the horizontal portion of the L-shaped connecting plate can be used as a reference surface for the top surface of the soft-pack battery module 43.

[0076] It can be understood that the positioning cylinder 414 is fixedly installed through a positioning cylinder mounting seat in an L-shaped structure, so that the positioning cylinder 414 works on a horizontal plane; the pressing cylinder 411 is fixedly installed through a pressing cylinder mounting seat in an L-shaped structure, so that the pressing cylinder 411 works on a horizontal plane. Among them, the jaw cylinder is fixedly installed through a gantry.

[0077] Based on the above embodiments, as Figure 7 shown, the soft-pack battery module positioning device 4 further includes a tooling plate 45 for placing the soft-pack battery module 43. The tooling plate 45 includes a base plate 451 and module support bars 452 located on the base plate 451. Symmetrically arranged module side limit blocks 453 and module side clamping blocks 454 are respectively installed on the opposite side surfaces of the module support bars 452. Both the module side limit blocks 453 and the module side clamping blocks 454 are in an L-shaped structure.

[0078] It should be noted that, in order to improve the stability of the soft-pack battery module 43, the module support bars 452 are in a rectangular structure. Two module side clamping blocks 454 are arranged at intervals on the left side surface of the module support bars 452, and two module side limit blocks 453 are arranged at intervals on the right side surface of the module support bars 452. The module side limit blocks 453 and the module side clamping blocks 454 are symmetrically arranged. Among them, the distance between the module side clamping blocks 454 and the module support bars 452 is adjustable.

[0079] It can be understood that, in order to improve the placement efficiency of the soft-pack battery module 43 and prevent damage to the soft-pack battery module 43, an arc surface is provided on the surface of the module side limit blocks 453 and the module side clamping blocks 454 that contacts the soft-pack battery module 43.

[0080] Based on the above embodiments, the pouch battery module 43 is magnetically connected to the module support bar 452.

[0081] It should be noted that the magnetic connection between the pouch battery module 43 and the module support bar 452 can prevent damage to the structure of the pouch battery module 43 and is also convenient for loading and unloading.

[0082] Based on the above embodiments, the positioning device for the pouch battery module further includes a lifter for adjusting the height of the tooling plate 45.

[0083] It should be noted that the lifter is installed at the bottom of the tooling plate 45, and the height of the tooling plate 45 can be adjusted by the lifting of the lifter, that is, the distance between the pouch battery module 43 and the L-shaped connecting plate can be adjusted.

[0084] Based on the above embodiments, the positioning device for the pouch battery module further includes a belt conveyor 44 for conveying the tooling plate 45.

[0085] It should be noted that the belt conveyor 44 includes two belts arranged symmetrically left and right, and the lifter can be installed between the two belts. The position of the tooling plate 45 can be adjusted by the belt conveyor 44.

[0086] Based on the above embodiments, rollers 455 are installed at the four top corners of the substrate 451, and the rollers 455 are in contact with the belts of the belt conveyor 44.

[0087] It should be noted that all four rollers 455 are in contact with the belts of the belt conveyor 44, that is, the two left rollers 455 are in contact with the left belt, and the two right rollers 455 are in contact with the right belt. And, a vertically arranged baffle is installed beside the belt. When the belt is moving, the rollers 455 can roll along the surface of the baffle, that is, the working surface of the rollers 455 is the surface of the baffle.

[0088] In the embodiment of the present invention, after the belt conveyor 44 transports the tooling plate 45 to the clamping station, the lifter adjusts the height of the tooling plate 45. With the first jaw and the pressing side spacer 413 as the pressing side, and the second jaw and the positioning side spacer 416 as the positioning side, the position of the pouch battery module 43 can be finely adjusted. After the adjustment is in place, the pouch battery module 43 is clamped, thus facilitating the next step of tab welding operation for the pouch battery module 43.

[0089] There are multiple groups of tab pressing assemblies 2 arranged corresponding to the welding assembly 1. Among them, two groups of tab pressing assemblies 2 can be installed on the surface of a box body 3 in a rectangular structure. The two groups of tab pressing assemblies 2 are arranged in sequence along the length direction of the box body 3, and the movement direction of the first sliding table is consistent with the length direction of the box body 3. The welding assembly 1 and the tab pressing assemblies 2 are arranged in sequence along the width direction of the box body 3. At this time, a soft-pack battery module positioning device 4 is correspondingly provided for each tab pressing assembly 2, that is, the soft-pack battery module positioning device 4 is installed on the surface of the box body 3, and the two groups of soft-pack battery module positioning devices 4 are arranged in sequence along the length direction of the box body 3. The soft-pack battery module positioning device 4, the tab pressing assembly 2, and the welding assembly 1 are arranged in sequence along the width direction of the box body 3.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tab welding system, characterized in that, it includes: a soft-pack battery module positioning device for positioning a soft-pack battery module, a tab pressing device for making the tab and the bus bar fit together, and a tab welding device for welding the tab and the bus bar; the tab pressing device includes a tab pressing assembly, and the tab pressing assembly includes a slidable pressing assembly mounting plate, two symmetrically arranged telescopic cylinders, two symmetrically arranged tab pressing heads, and two symmetrically arranged pressing head sliding seats; the fixed ends of the two telescopic cylinders are both hinged to the pressing assembly mounting plate, the movable end of one telescopic cylinder is hinged to one pressing head sliding seat, and the movable end of the other telescopic cylinder is hinged to the other pressing head sliding seat; the two pressing head sliding seats are both slidably mounted on the pressing assembly mounting plate, and the sliding direction of the pressing head sliding seat is perpendicular to that of the pressing assembly mounting plate; one tab pressing head is mounted on one pressing head sliding seat, and the other tab pressing head is mounted on the other pressing head sliding seat; the soft-pack battery module positioning device includes a first module clamping assembly and a second module clamping assembly for clamping the soft-pack battery module from different directions; the first module clamping assembly includes a positioning cylinder and a pressing cylinder, the movable end of the positioning cylinder is sequentially connected with a positioning side pressing block and a positioning side cushion block, and the movable end of the pressing cylinder is sequentially connected with a pressing side pressing block and a pressing side cushion block; the second module clamping assembly includes a jaw cylinder, and a first jaw and a second jaw are symmetrically arranged on both sides of the jaw cylinder.

2. The tab welding system according to claim 1, characterized in that, the tab pressing device further includes a first displacement sensor for detecting the displacement of one tab pressing head and a third displacement sensor for detecting the displacement of the other tab pressing head.

3. The tab welding system according to claim 2, characterized in that, the tab pressing device further includes a second displacement sensor for detecting the distance between the tab and the bus bar.

4. The tab welding system according to any one of claims 1 to 3, characterized in that, the tab welding system further includes two sets of dust extraction components, each dust extraction component includes a dust extraction pipe, and an air extraction through hole is opened on each tab pressing head; the intake end of one dust extraction pipe mounted on one tab pressing head is arranged towards the air extraction through hole, and the intake end of the other dust extraction pipe mounted on the other tab pressing head is arranged towards the air extraction through hole.

5. The tab welding system according to claim 4, characterized in that, each tab pressing head having a hollow structure is correspondingly provided with a plurality of air blowing holes at the air extraction through hole.

6. The tab welding system according to claim 1, characterized in that, both the first jaw and the second jaw include an L-shaped connecting plate connected to the movable end of the jaw cylinder and an inverted U-shaped plate connected to the L-shaped connecting plate.

7. The tab welding system according to claim 1, characterized in that, The soft-pack battery module positioning device further includes a tooling plate for placing the soft-pack battery module. The tooling plate includes a substrate and module support bars located on the substrate. Symmetrically arranged module side limit blocks and module side clamping blocks are respectively installed on opposite side surfaces of the module support bars. Both the module side limit blocks and the module side clamping blocks are in an L-shaped structure.

8. The tab welding system according to claim 7, characterized in that the soft-pack battery module positioning device further includes a belt conveyor for conveying the tooling plate.

9. The tab welding system according to any one of claims 1 to 3, characterized in that the tab welding device includes a welding assembly. The welding assembly includes a galvanometer welding head, an image acquisition module, a first slide table, and a second slide table; the second slide table is installed on the first slide table, the galvanometer welding head is installed on the second slide table, and the moving directions of the first slide table and the second slide table are perpendicular to each other; the image acquisition module is installed on the first slide table through a lifting member.

Images