CN116315491A

CN116315491A - Lug pre-welding machine

Info

Publication number: CN116315491A
Application number: CN202211726097.5A
Authority: CN
Inventors: 杨金标; 蒋大龙; 袁龙海
Original assignee: Huizhou Longhe Technology Co ltd
Current assignee: Huizhou Longhe Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-23

Abstract

The invention relates to the field of battery cell processing, in particular to a tab pre-welding machine. The tab pre-welding machine comprises a frame, and a feeding mechanism, a Hi-spot testing mechanism, a turnover detection mechanism, an ultrasonic welding mechanism, a tab shaping mechanism, a tab cutting mechanism, a tab rubberizing mechanism, a rear end detection mechanism and a blanking mechanism which are sequentially arranged on the frame along the working procedure; according to the invention, a more reasonable process design is adopted, two tests are carried out before welding, and after welding, shaping, cutting and rubberizing are carried out in sequence, the quality of products is ensured, and only one station is needed for welding, so that the processing efficiency can be improved in the practical application process, and the mass production and processing are satisfied.

Description

Lug pre-welding machine

Technical Field

The invention relates to the field of battery cell processing, in particular to a tab pre-welding machine.

Background

In the processing process of the blade battery, the lug on the battery cell needs to be pre-welded, and the rectangular battery cell with the lug at the opposite ends of the battery cell is not suitable for the traditional lug pre-welding equipment, otherwise, the problem of inaccurate pre-welding can occur, and the corresponding design needs to be carried out according to the structure of the rectangular battery cell; in the prior art, the tab pre-welding has the problem of lower processing efficiency because the arrangement of working procedures is unreasonable; the positive electrode and the negative electrode of each battery cell are respectively pre-welded, and extra stations are required to be occupied; in addition, when the electrode lugs are welded, the electrode lugs are directly welded in a disordered state, and the problem of poor welding can occur; for example, the prior art discloses a workbench for pre-welding and cutting cells, which comprises: the device comprises a feeding assembly, a clamp assembly, a lug positive electrode welding assembly, a lug negative electrode welding assembly, a lug cutting assembly, a CCD detection assembly, a dust removal assembly, a blanking assembly, a turntable assembly and a feeding and blanking assembly line body; the feeding assembly, the clamp assembly, the tab anode welding assembly, the tab cathode welding assembly, the tab cutting assembly, the CCD detection assembly, the dust removal assembly and the blanking assembly are sequentially surrounded and fixed on the turntable assembly, and the turntable assembly is arranged on one side of the feeding and blanking assembly line body; the turntable assembly can drive the feeding assembly, the clamp assembly, the lug positive electrode welding assembly, the lug negative electrode welding assembly, the lug cutting assembly, the CCD detection assembly, the dust removal assembly and the blanking assembly to do circular motion, and the tangential direction of the rotation of the turntable assembly is consistent with the moving direction of the feeding and blanking assembly line body. The pre-welding equipment adopts annular station design, so that the occupied space of the equipment is seemingly saved, but the working of the tab anode welding component and the tab cathode welding component is carried out separately, so that the battery core is required to be one station more, and the processing efficiency is reduced; and for multi-pad cells, it is necessary to enlarge the radius of the table to increase the space for the welder setup, which is practically impossible. And the clamp circulated on the device needs to run through the whole process to return to the position of the feeding assembly, and the actual clamp flows a plurality of stations, so that the processing efficiency is low. In addition, when the tab is welded, the device is also directly welded in a disordered state, and the problem of poor welding can occur.

Disclosure of Invention

The invention provides a tab pre-welding machine for solving the problems of unreasonable process setting and low processing efficiency of the equipment in the background technology. The method has more simplified process design and is suitable for the prewelding processing of large-batch battery cell lugs.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a utmost point ear welder in advance, includes the frame and follow the process in the frame sets gradually:

the feeding mechanism is used for feeding the battery cell to be processed to the next station;

the Hi-point testing mechanism is used for testing the thickness of the fed battery cell;

the turnover detection mechanism is used for overturning the battery cell subjected to the thickness test and detecting the position of the tab;

the ultrasonic welding mechanism is used for carrying out ultrasonic welding on the electrode lugs on the conveyed battery cell;

the tab shaping mechanism is used for shaping the tab on the welded battery cell;

the tab cutting mechanism is used for cutting the tab on the shaped battery cell;

the tab rubberizing mechanism is used for rubberizing and protecting the welding lead on the tab;

the rear end detection mechanism is used for detecting the cutting length of the tab and rubberizing;

and the discharging mechanism is used for discharging the qualified battery cells.

Further, the rack is provided with an internal clamp circulation conveying line, a battery cell feeding conveying line and a battery cell discharging conveying line, the battery cell feeding conveying line and the battery cell discharging conveying line are respectively positioned at two ends of the internal clamp circulation conveying line, the battery cell positioning mechanism, the ultrasonic welding mechanism, the tab shaping mechanism, the tab cutting mechanism, the tab rubberizing mechanism and the rear end detection mechanism are sequentially arranged along the internal clamp circulation conveying line, the feeding mechanism, the Hi-spot testing mechanism and the battery cell positioning mechanism are sequentially arranged along the battery cell feeding conveying line, and the discharging mechanism is arranged at one end of the battery cell discharging conveying line; and the other end of the battery cell blanking conveying line is provided with a blanking NG pull belt for collecting unqualified battery cells.

Furthermore, the one end that electric core unloading transfer chain is kept away from feed mechanism still is equipped with and is used for turning over the NG buffer memory mechanism that turns over detection mechanism test as unqualified electric core buffer memory collection, anchor clamps inner loop transfer chain one end is connected turn over detection mechanism with between the NG buffer memory mechanism, the other end is connected unloading NG stretching strap with between the feed mechanism.

Further, anchor clamps inner loop transfer chain includes anchor clamps, carries the mainline, material loading lift module and is used for driving the backward flow lift module that anchor clamps go up and down, carry the mainline including being used for driving the top transfer chain and the bottom return wire of anchor clamps translation, top transfer chain and bottom return wire are located different high layer parallel arrangement and both ends parallel and level, the material loading lift module includes the material loading support, locates material loading lift cylinder on the material loading support and the material loading movable rail that can with the one end of top transfer chain or the one end butt joint of bottom return wire under the material loading lift cylinder drives, backward flow lift module includes the backward flow support, locates backward flow lift cylinder on the backward flow support and backward flow movable rail that can with the other end of top transfer chain or the other end butt joint of bottom return wire under the backward flow lift cylinder drives.

Further, the top of unloading support still is equipped with the dust removal subassembly that is used for blowing the dust removal to the electricity core.

Further, the Hi-spot testing mechanism comprises a thickness measuring base, a guide rail arranged on the thickness measuring support, thickness measuring units respectively arranged at two ends of the guide rail and a driving mechanism for driving the battery cell to move towards the thickness measuring unit at the corresponding end, wherein the thickness measuring units comprise thickness measuring supports, a pressurizing assembly arranged on the thickness measuring supports and an in-place sensor arranged at one side of the guide rail.

Further, the actuating mechanism include with the parallel lead screw of guide rail, be used for driving lead screw pivoted motor and threaded connection are in slider on the lead screw, the top of slider is equipped with the jacking piece that is used for placing the electric core, the slider with guide rail sliding connection, the pressurization subassembly is including locating the electric jar at support top and connecting the pressurization structure on the electric jar output, during the test, pressurization structure can just to the jacking piece.

Further, a buffer film is arranged at the top of the jacking block.

Further, the ultrasonic welding mechanism comprises 4N groups of ultrasonic welding machines, wherein N is more than 1, and the ultrasonic welding machines are symmetrically distributed on two opposite sides of the conveying main line.

Further, the ultrasonic welding machine comprises a supporting platform, a welding assembly and a welding seat, wherein the welding assembly and the welding seat are arranged on the supporting platform, an electric cylinder used for driving the supporting platform to lift is arranged at the bottom of the supporting platform, the welding assembly comprises a machine shell, an ultrasonic energy generation unit and a welding head, the welding head is arranged in the machine shell, the welding head is opposite to the welding seat, the welding head is arranged outside the machine shell and is connected with the ultrasonic energy generation unit, a welding head lifting cylinder used for driving the welding head to lift is further arranged in the machine shell, and the welding head is connected with the output end of the welding head lifting cylinder.

Further, one side of the casing, which is close to the main conveying line, is further provided with a lug welding front shaping unit, the lug welding front shaping unit comprises a lug pressing cylinder and a lug shaping pressing block used for pressing the lug on the welding seat, the cylinder body of the lug pressing cylinder is fixed on the casing, and the lug shaping pressing block is arranged at the output end of the lug pressing cylinder.

Compared with the prior art, the beneficial effects are that:

1. according to the invention, a more reasonable process design is adopted, two tests are carried out before welding, and after welding, shaping, cutting and rubberizing are carried out in sequence, the quality of products is ensured, and only one station is needed for welding, so that the processing efficiency can be improved in the practical application process, and the mass production and processing are satisfied.

2. The clamp internal circulation conveying line is skillfully designed to realize the circulation reflux of the clamp among all processing stations, and the circulation reflux efficiency of the clamp is improved. And main welding, plastic, cut, rubberizing station distributes along sharp, can match the processing to rectangular shape electric core more.

3. According to the invention, the supporting platform of the whole ultrasonic welding machine can be driven to ascend by the power electric cylinder at the bottom, so that the bonding surface between the welding seat below and the electrode lug of the battery cell is tighter, and the part of the electrode lug of the battery cell, which is drooped under the influence of gravity, is flattened by driving the welding seat to ascend, so that the ultrasonic welding machine is more beneficial to complete welding of the electrode lug of the battery cell before welding; in order to solve the problem that most of welding is irregular, if welding is performed directly, poor welding is caused, so that a shaping unit before tab welding is additionally arranged in the embodiment, the tab is shaped before tab welding, and welding quality is guaranteed.

Drawings

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a schematic diagram of the overall structure of the present invention.

Fig. 3 is a schematic structural view of the internal circulation conveyor line of the clamp in the present invention.

FIG. 4 is a schematic diagram of the Hi-pot test mechanism according to the present invention.

Fig. 5 is a schematic structural view of a mover manipulator according to the present invention.

Fig. 6 is a schematic structural view of a tab shaping mechanism according to the present invention.

Fig. 7 is a schematic view of the structure of the ultrasonic welder in shaping the tab according to the present invention.

Fig. 8 is a schematic view showing the overall structure of an ultrasonic welder according to the present invention.

Fig. 9 is a partial enlarged view at C in fig. 8.

Fig. 10 is a schematic view of an ultrasonic welder of the present invention prior to welding.

Fig. 11 is a partial enlarged view at a in fig. 10.

Fig. 12 is a schematic view of the structure of an ultrasonic welding mechanism according to the present invention.

Fig. 13 is a schematic view of an ultrasonic welding mechanism in the present invention at the time of pre-welding.

Fig. 14 is a schematic structural view of a tab cutting mechanism in the present invention.

Fig. 15 is a schematic structural view of a tab rubberizing mechanism in the invention.

Fig. 16 is a schematic structural view of the rubberizing unit in fig. 15.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent. In addition, it should also be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application and the overall thickness, length, width, etc. dimensions of the integrated device shown in the drawings are merely illustrative and should not be construed as limiting the present application in any way.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present invention and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. In the description of the embodiments of the present application, the azimuth or positional relationship indicated by the technical terms "thickness", "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the embodiments of the present application.

The pole pieces mentioned in the embodiments of the present application are components of a battery cell, and as those skilled in the art will appreciate, the battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece.

The technical solution of the present invention will be further specifically described below by means of specific embodiments, and with reference to the accompanying drawings, it is apparent that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Example 1

As shown in fig. 1 and fig. 2, the tab pre-welding machine comprises a frame 10 and a plurality of frames 10 sequentially arranged along the working procedure:

the feeding mechanism 11 is used for feeding the battery cell to be processed to the next station;

the Hi-point testing mechanism 12 is used for testing the thickness of the fed battery cell;

the turnover detection mechanism 13 is used for overturning the battery cell subjected to the thickness test and detecting the position of the tab;

the ultrasonic welding mechanism 14 is used for carrying out ultrasonic welding on the electrode lugs on the conveyed battery cell;

the tab shaping mechanism 15 is used for shaping the tab on the welded battery cell;

the tab cutting mechanism 16 is used for cutting the tab on the shaped battery cell;

the tab rubberizing mechanism 18 is used for rubberizing and protecting the welding lead on the tab;

the rear end detection mechanism 19 is used for detecting the cutting length of the tab and the rubberizing;

and the blanking mechanism 20 is used for blanking the battery cells which are qualified in detection.

After the code scanning of the battery cell to be processed is completed through the material flow line, the battery cell is taken through a first mover manipulator in the feeding mechanism 11, the battery cell is transversely moved to reach the HIP-port testing mechanism, the material is discharged, the first mover manipulator of the feeding mechanism 11 is reset, the test is completed, a second mover manipulator on the equipment is transversely moved to take the material, the battery cell is placed on the tab turnover detecting mechanism 13, the battery cell positioning action is completed on the jig, the battery cell is positioned, the module is transversely moved, the turnover detecting and resetting are carried out, the third mover manipulator is transversely moved, the battery cell is taken on the turnover detecting and positioning platform, the battery cell which is qualified in detection is placed at the position of the material level clamp 107 on the inner circulation, the battery cell is placed on the circulation line jig, the ultrasonic welding mechanism 14 is reached along with the action of the circulation line, the welding action is completed, the tab shaping mechanism 15 is completed after the welding is continued to be moved along with the jig, the tab cutting mechanism 16 of the next cutting station is reached along with the movement of the jig, and the tab cutting action is completed; the tab cutting mechanism 16 is provided with a dust removing component 17 to remove dust from the tab, and the tab is moved to a tab rubberizing module along with a jig after dust removal is finished, so that tab rubberizing is finished, and the rubberizing reaches a rear end detection mechanism 19 of the next station to finish cutting length and rubberizing detection; finally, the material reaches the blanking mechanism 20 for blanking. The design of such process, through twice test before the welding, weld in proper order, plastic, cut, rubberize after again through the terminal test, guarantee the quality of product to the process is more reasonable, welds only needs one station, and the in-process efficiency of processing can be promoted, satisfies mass production processing.

In the present invention, the structure of the mover manipulator is shown in fig. 5, and the mover manipulator 24 may drive the clamping block to clamp the electric core through the clamping cylinder, so as to realize the transfer of the electric core, and the mover manipulator 24 is a device for transferring materials commonly used in mechanical equipment, which is not described in detail herein; the structure of the lug shaping mechanism 15 is shown in fig. 6, when the battery core is in place, the shaping structure is driven to move forward by the pen-shaped air cylinder 310, and the shaping air cylinder 313 on the shaping structure drives the upper shaping block 312 to move towards the lower shaping block 311, so that the lug is smoothed; the principle of the tab cutting mechanism 16 is similar to the prior art, as shown in fig. 14, mainly after a pole piece is in place, an upper cutter 162 is driven to move towards a lower cutter 163 through a cutting cylinder 161, the tab is cut off by the engagement of the cutters, the tab rubberizing mechanism 18 is also similar to the prior art, as shown in fig. 15 and 16, the tab rubberizing mechanism 18 mainly comprises 2 rubberizing units 180 symmetrically arranged, a rubberizing component 181 and a module 182 capable of driving the rubberizing component 181 to move are arranged on the rubberizing units 180, the rubberizing units 180 comprise a rubberizing disc 183, a rubberizing cylinder 184, an in-place sensor 192, a magnetic damper 191 for conveying adhesive tapes, an adhesive surface rubberizing wheel 185, a smooth surface rubberizing wheel 186, a cutter 187, a rubberizing arm 188, a rubberizing cylinder 189 and a rubberizing cylinder 189, and a track rubberizing, and a limiting component 190 are arranged on the track, and the principle is as follows: the circulation line clamp stops in place, the glue opening cylinder 184 opens the glue, the glue clamping arm 188 clamps the adhesive tape to complete the glue pulling action, the glue suction head on the glue suction assembly 181 descends to absorb the adhesive tape, the cutter 187 completes the glue cutting action, the glue suction assembly 181 absorbs the adhesive tape to move along with the module 182, the glue suction assembly 181 reaches the glue applying position, the glue suction assembly 181 completes the distance changing, the adhesive tape is adhered to the battery cell, and the glue applying is completed.

In this embodiment, a fixture internal circulation conveying line 102, a battery core feeding conveying line 101 and a battery core discharging conveying line 103 are arranged on a rack 10, the battery core feeding conveying line 101 and the battery core discharging conveying line 103 are respectively located at two ends of the fixture internal circulation conveying line 102, an ultrasonic welding mechanism 14, a tab shaping mechanism 15, a tab cutting mechanism 16, a tab rubberizing mechanism 18 and a rear end detecting mechanism 19 are sequentially arranged along the fixture internal circulation conveying line 102, a feeding mechanism 11 and a Hi-spot testing mechanism 12 are sequentially arranged along the battery core feeding conveying line 101, and a discharging mechanism 20 is arranged at one end of the battery core discharging conveying line 103; the other end of the cell blanking conveying line 103 is provided with a blanking NG pull belt 21 for collecting unqualified cells. The battery core blanking transfer chain 103 is kept away from the NG buffer memory mechanism 104 that is used for will turning over the battery core buffer memory that turns over detection mechanism 13 test to be unqualified and collect far away from feed mechanism 11, and anchor clamps inner loop transfer chain 102 one end is connected between turning over detection mechanism 13 and NG buffer memory mechanism 104, and the other end is connected between unloading NG stretching strap 21 and feed mechanism 20. Thus, in order to ensure the quality of products, three detection procedures are set in the processing process, a Hi-point testing mechanism 12 and a turnover detection mechanism 13 are set on the battery cell feeding conveying line 101, and if the NG is identified in the two procedures, the battery cell transversely moves to the NG pulling belt lifting platform at the feeding position, so that different kinds of NG conditions are classified. The jig is arranged on the battery cell blanking conveying line 103 to reach the blanking platform, the manipulator identifies whether the battery cell of the blanking platform has an NG state, the battery cell without NG reaches the conveying platform of the blanking mechanism 20 along with the manipulator, the battery cell is conveyed to the next machine, if NG occurs, the battery cell is directly clamped to the blanking NG pull belt 21, meanwhile, the battery cell can be paired again by the double-throw pull belt 22 arranged beside, and the battery cell is conveyed to the blanking conveying module.

In this embodiment, the fixture internal circulation conveying line 102 includes a fixture 107, a conveying main line, a feeding lifting module 108 and a backflow lifting module 109 for driving the fixture 107 to lift, where the conveying main line includes a top conveying line 105 and a bottom backflow line 106 for driving the fixture 107 to translate, the top conveying line 105 and the bottom backflow line 106 are disposed in parallel at different height layers and have two parallel ends, the feeding lifting module 108 includes a feeding bracket 1081, a feeding lifting cylinder 1082 disposed on the feeding bracket 1081, and a feeding movable rail driven by the feeding lifting cylinder 1082 and capable of being in butt joint with one end of the top conveying line 105 or one end of the bottom backflow line 106, and the backflow lifting module 109 includes a backflow bracket 1091, a backflow lifting cylinder 1092 disposed on the backflow bracket 1091, and a backflow movable rail driven by the backflow lifting cylinder 1092 and capable of being in butt joint with the other end of the top conveying line 105 or the other end of the bottom backflow line 106; the top of the blanking bracket is also provided with a dust removal component 17 for blowing and removing dust to the battery cells. Thus, referring to the figure, the top conveying line 105 is at the upper layer, the bottom return line 106 is at the lower layer, and the top conveying line 105 and the bottom return line 106 mainly include the linear motor 130 and the guide rail 122, which can both implement movement of the fixture 107, and are not described in detail herein. The working principle is approximately as follows: initially, the feeding movable rail 1083 and the reflow movable rail 1093 are in butt joint with the rail 122 on the top conveying line 105, after the battery cell is grabbed by a manipulator and placed on the clamp 107, the clamp 107 clamps the battery cell, and then sequentially passes through the ultrasonic welding mechanism 14, the tab shaping mechanism 15, the tab cutting mechanism 16, the tab rubberizing mechanism 18 and the rear end detecting mechanism 19 along with the top conveying line 105; then anchor clamps 107 reach the terminal backward flow movable rail of top transfer chain 105, and the back electricity core is taken away by the manipulator, and empty anchor clamps 107 descend to the below along with backward flow lifting module 109 for backward flow movable rail and the bottom return wire 106 butt joint of below, anchor clamps 107 along with bottom return wire 106 backward flow to the below of initial end, the material loading movable rail and the bottom return wire 106 butt joint in the material loading lifting module 108 this moment, accept the back with anchor clamps 107, rise to the top, wait the material loading, so circulate, realize the circulation backward flow of anchor clamps 107 between each processing station, improve the circulation backward flow efficiency of anchor clamps 107. And main welding, plastic, cut, rubberizing station distributes along sharp, can match the processing to rectangular shape electric core more.

As shown in fig. 4, the Hi-spot testing mechanism 12 includes a thickness measuring base 121, a guide rail 122 disposed on the thickness measuring support, thickness measuring units 123 disposed at two ends of the guide rail 122, and a driving mechanism for driving the battery cell to move toward the thickness measuring unit 123 at the corresponding end, where the thickness measuring unit 123 includes a thickness measuring bracket 124, a pressurizing assembly 125 disposed on the thickness measuring bracket 124, and an in-place sensor 128 disposed at one side of the guide rail 122. The driving mechanism comprises a screw rod 129 parallel to the guide rail 122, a motor 130 for driving the screw rod 129 to rotate and a sliding block 131 in threaded connection with the screw rod 129, wherein the sliding block 131 is located at two ends of the guide rail 122, the motor 130 and two sides of the screw rod 129 are both arranged, a jacking block 132 for placing a battery cell is arranged at the top of the sliding block 131, the sliding block 131 is in sliding connection with the guide rail 122, the pressurizing assembly 125 comprises an electric cylinder 126 arranged at the top of the bracket and a pressurizing structure 127 connected to the output end of the electric cylinder, and the pressurizing structure 127 can be opposite to the jacking block 132 during testing. Like this, the material loading manipulator gets the electric core sideslip through pressing from both sides, reaches HIP-POT blowing platform, puts the electric core on anchor clamps 107, and anchor clamps 107 accomplish the location and accomplish sharp sideslip along with ball screw 129, and the response stops in place, and the test station has the material discernment, prevents that the air pressure from taking place, and electric jar 126 pushes down, accomplishes the pressurization thickness measurement, carries out insulation testing to the polar group again.

In this embodiment, as shown in fig. 1, 2 and 12, the ultrasonic welding mechanism 14 includes 8 groups of ultrasonic welders 140, and the ultrasonic welders 140 are symmetrically distributed on opposite sides of the conveying main line. Like this, in order to make the welding more efficient, set up 8 ultrasonic welding machines in this embodiment, 8 ultrasonic welding machines include that 4 are used for anodal ultrasonic welding machine and 4 are used for negative pole pre-welding's negative pole ultrasonic welding machine of anodal, and 4 are all located the same one side of conveying main line, and 4 are all located the opposite side of conveying main line to anodal ultrasonic welding machine and negative pole ultrasonic welding machine one-to-one set up, can weld positive electrode tab and negative electrode tab on a electric core 200 simultaneously. The positive electrode of each cell 200 needs two welding marks, the negative electrode of each cell 200 needs two welding marks, referring to fig. 13, 2 cells 200 are placed on each fixture, and the front is the first cell 200, the rear is the second cell 200, in order to facilitate the description, in this embodiment, the 8 groups of ultrasonic welding machines are named with reference numerals, and the working procedure is as follows: the battery cell 200 finishes feeding and secondary positioning from the internal circulation feeding level, and moves to welding stations of an A1 ultrasonic welding machine and an A5 ultrasonic welding machine along with the internal circulation power part from the feeding station to finish first welding printing of the first battery cell 200 on the left side; after the first welding, moving to the welding stations of the ultrasonic welding machines A2 and A6 along with internal circulation power to finish the second welding of the first battery cell 200 on the jig; after the second welding is finished, the first electric core 200 finishes ultrasonic welding and moves to welding stations of A3 and A7 welding machines along with the internal circulation power part, and finishes the first welding of the second electric core 200; the follow-up power part transversely moves to the welding station of the ultrasonic welding machines A4 and A8 to finish the second welding printing of the second battery cell 200; the entire process of the ultrasonic welding mechanism 14 is completed. The welding process can meet the simultaneous welding of the anode and the cathode, save the process time and meet the simultaneous conveying treatment of 2 battery cells 200; and can meet the requirements of a plurality of welding marks on the electrode lug of one battery cell 200. The arrangement is quite reasonable, and the welding efficiency and quality can be effectively improved.

The ultrasonic welding machine comprises a supporting platform 141, a welding assembly and a welding seat 145, wherein the welding assembly and the welding seat are positioned on the supporting platform 141, an electric cylinder 142 for driving the supporting platform 141 to lift is arranged at the bottom of the supporting platform 141, the welding assembly comprises a machine shell 143, an ultrasonic energy generation unit and a welding head 144, the ultrasonic energy generation unit is arranged inside the machine shell 143, the welding head 144 is opposite to the welding seat 145, the welding head 144 is positioned outside the machine shell 143 and is connected with the ultrasonic energy generation unit, a welding head 144 lifting cylinder for driving the welding head 144 to lift is further arranged in the machine shell 143, and the welding head 144 is connected with the output end of the welding head 144 lifting cylinder. Thus, when the in-place sensor 149 detects that the tab is in place, the tab has a natural sagging tendency under the action of gravity, the height of the internal circulation jig is fixed, and initially, the welding seat 145 is positioned below the tab and has a certain interval, so that in order to enable the tab to return to a horizontal state, the supporting platform 141 of the whole ultrasonic welding machine can be driven by the power cylinder at the bottom to rise, and then the welding seat 145 below is more tightly attached to the tab of the battery cell, and the portion of the battery cell tab sagging under the influence of gravity is flattened through the process of driving the welding seat 145 to rise, so that the welding of the ultrasonic welding machine is more facilitated.

Example 2

In this embodiment, referring to fig. 7, 8 and 9, the further preferred embodiment of embodiment 1 is an improvement of the tab ultrasonic pre-welding, wherein, a tab pre-welding shaping unit 146 is further provided on a side of the casing 143 close to the main conveying line, the tab pre-welding shaping unit 146 includes a tab pressing cylinder 147 and a tab shaping pressing block 148 for flattening the tab supported on the welding base 145, the cylinder body of the tab pressing cylinder 147 is fixed on the casing 143, and the tab shaping block 148 is provided at the output end of the tab pressing cylinder. The inner side of the tab shaping pressing block 148 is just flush with the outer side of the welding seat 145, and when the tab is in place, the tab pressing cylinder 147 drives the tab shaping pressing block 148 to press down, so that the tab is contacted with the tab, and the tab is pre-shaped and then welded; because the tabs of the battery cell 200 are mostly irregular before welding, if welding is performed directly, a problem of poor welding occurs, so in this embodiment, a tab pre-welding shaping unit 146 is additionally provided, and the tabs are shaped before welding the tabs, so as to ensure the welding quality.

Example 3

The present embodiment is a further preferred embodiment of embodiment 1, in which a buffer film is further provided on top of the jacking block 132; the buffer film can be a flexible film such as a rubber film and a PET film and is used for buffering the energy pressed by the pressing structure.

It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The tab pre-welding machine is characterized by comprising a frame (10) and the frame (10) sequentially arranged along the working procedures:

the feeding mechanism (11) is used for feeding the battery cell to be processed to the next station;

the Hi-point testing mechanism (12) is used for testing the thickness of the fed battery cell;

the turnover detection mechanism (13) is used for overturning the battery cell after the thickness test and detecting the position of the tab;

the ultrasonic welding mechanism (14) is used for carrying out ultrasonic welding on the electrode lugs on the conveyed battery cell;

the tab shaping mechanism (15) is used for shaping the tab on the welded battery cell;

the tab cutting mechanism (16) is used for cutting the tab on the shaped battery cell;

the tab rubberizing mechanism (18) is used for rubberizing and protecting the welding lead on the tab;

the rear end detection mechanism (19) is used for detecting the cutting length of the tab and rubberizing;

and the blanking mechanism (20) is used for blanking the battery cells which are qualified in detection.

2. The tab pre-welding machine according to claim 1, wherein a clamp inner circulation conveying line (102), a battery cell feeding conveying line (101) and a battery cell discharging conveying line (103) are arranged on the frame (10), the battery cell feeding conveying line (101) and the battery cell discharging conveying line (103) are respectively located at two ends of the clamp inner circulation conveying line (102), the ultrasonic welding mechanism (14), the tab shaping mechanism (15), the tab cutting mechanism (16), the tab rubberizing mechanism (17) and the rear end detection mechanism (18) are sequentially arranged along the clamp inner circulation conveying line, the feeding mechanism (11) and the Hi-spot testing mechanism (12) are sequentially arranged along the battery cell feeding conveying line (101), and the discharging mechanism (20) is arranged at one end of the battery cell discharging conveying line (103); and the other end of the battery core blanking conveying line (103) is provided with a blanking NG pulling belt (21) for collecting unqualified battery cores.

3. The tab pre-welding machine according to claim 2, wherein one end of the battery core blanking conveying line (103) away from the feeding mechanism (11) is further provided with an NG buffer mechanism (104) for buffering and collecting the battery core which is tested as unqualified by the turnover detecting mechanism (13), one end of the clamp inner circulation conveying line (102) is connected between the turnover detecting mechanism (13) and the NG buffer mechanism (104), and the other end of the clamp inner circulation conveying line is connected between the blanking NG pull belt (21) and the blanking mechanism (20).

4. The tab pre-welding machine according to claim 2, wherein the clamp inner circulation conveying line comprises a clamp (107), a conveying main line, a feeding lifting module (108) and a feeding movable rail (1083) for driving the clamp to lift, the conveying main line comprises a top conveying line (105) and a bottom return line (106) for driving the clamp to translate, the top conveying line (105) and the bottom return line (106) are arranged in parallel with different height layers and are flush at two ends, the feeding lifting module (108) comprises a feeding support (1081), a feeding lifting cylinder (1082) arranged on the feeding support (1081) and a feeding movable rail (1083) capable of being abutted with one end of the top conveying line (105) or one end of the bottom return line (106) under the driving of the feeding lifting cylinder (1082), and the backflow lifting module (109) comprises a backflow support (1091), a backflow lifting cylinder (2) arranged on the backflow support (1091) and a backflow rail (1093) capable of being abutted with the other end of the top conveying line (1092) or the bottom return rail (1093) capable of being abutted.

5. The tab pre-welding machine according to claim 4, wherein a dust removal assembly (17) for blowing dust to the battery cells is further arranged on top of the reflow bracket (1091).

6. The tab pre-welding machine according to claim 1 or 2, wherein the Hi-spot testing mechanism comprises a thickness measuring base (121), a guide rail (122) arranged on the thickness measuring base (121), thickness measuring units (123) respectively arranged at two ends of the guide rail (122), and a driving mechanism for driving the battery cell to move towards the thickness measuring unit at the corresponding end, wherein the thickness measuring units (123) comprise thickness measuring supports (124), a pressurizing assembly (125) arranged on the thickness measuring supports (124), and an in-place sensor (128) arranged on one side of the guide rail (122).

7. The tab pre-welding machine according to claim 6, wherein the driving mechanism comprises a screw rod (129) parallel to the guide rail, a motor (130) for driving the screw rod to rotate, and a sliding block (131) in threaded connection with the screw rod, a jacking block (132) for placing a battery cell is arranged at the top of the sliding block, the sliding block (131) is in sliding connection with the guide rail (129), the pressurizing assembly (125) comprises an electric cylinder (126) arranged at the top of the thickness measuring bracket (124) and a pressurizing structure (127) connected to the output end of the electric cylinder (126), and the pressurizing structure (127) can be opposite to the jacking block (132) during testing.

8. The tab pre-welder of claim 7, wherein a buffer film is provided on top of the jacking block (132).

9. The tab pre-welder of claim 4, wherein the ultrasonic welding mechanism (14) comprises 4N sets of ultrasonic welders (140), where N > 1, the ultrasonic welders (140) being symmetrically distributed on opposite sides of the conveying main line.

10. The tab pre-welding machine according to claim 9, characterized in that the ultrasonic welding machine comprises a supporting platform (141), a welding assembly and a welding seat (145) which are positioned on the supporting platform (141), an electric cylinder (142) for driving the supporting platform (141) to lift is arranged at the bottom of the supporting platform (141), the welding assembly comprises a machine shell (143), an ultrasonic energy generating unit and a welding head (144) which are arranged in the machine shell (143) and are opposite to the welding seat, the welding head (144) is positioned outside the machine shell (143) and is connected with the ultrasonic energy generating unit, a welding head lifting cylinder for driving the welding head to lift is further arranged in the machine shell (143), and the welding head (144) is connected with the output end of the welding head lifting cylinder.

11. The tab pre-welding machine according to claim 10, wherein a tab pre-welding shaping unit (146) is further arranged on one side, close to the main conveying line, of the casing (143), the tab pre-welding shaping unit (146) comprises a tab pressing cylinder (147) and a tab shaping pressing block (148) for flattening tabs supported on the welding base (145), a cylinder body of the tab pressing cylinder (147) is fixed on the casing (143), and the tab shaping block (148) is arranged at an output end of the tab pressing cylinder (147).