CN211162394U - Laser welding utmost point ear equipment - Google Patents

Abstract

The utility model provides a laser welding utmost point ear equipment relates to the lithium cell and makes technical field, this laser welding utmost point ear equipment includes the organism, automatic unwinding device, automatic winding device, drive arrangement and utmost point ear laser welding device, automatic unwinding device sets up on the organism, be used for bearing and unreel the pole piece coil stock, automatic winding device sets up on the organism, be used for bearing rolling pole piece coil stock, drive arrangement sets up between automatic unwinding device and automatic winding device, be used for driving the pole piece by automatic unwinding device to the motion of automatic winding device, utmost point ear laser welding device sets up on the organism, be used for carrying out laser welding to the pole piece. Compared with the prior art, the utility model provides a pair of laser welding utmost point ear equipment through laser welding's mode, adopts non-contact welding, need not like ultrasonic welding to need to change the bonding tool, and can effectively guarantee the virtual welding rate, weld indexes such as residual rate, pulling force after, solves the welding problem that ultrasonic welding brought.

Description

Laser welding utmost point ear equipment

Technical Field

The utility model relates to a lithium cell manufacturing technology field particularly, relates to a laser welding utmost point ear equipment.

Background

In the welding process of the lithium ion battery tab and the pole piece substrate, the pole piece substrate is a very thin sheet (within 12 microns), in the welding process of the lithium ion battery tab and the pole piece substrate, ultrasonic welding is adopted in a traditional welding mode, a high-voltage and high-frequency signal generated by a generator is converted into high-frequency mechanical vibration to be processed on a tab and a pole piece foil, the temperature of a contact point is increased through friction among the pole piece substrate, the tab and a welding head, and when the temperature reaches the melting point of the tab and the pole piece foil, the tab and the pole piece foil are melted and are melted. However, the welding of the tab and the pole piece foil is very troublesome: the welding head has limited service life and needs to be replaced periodically, the false welding is serious (due to the ultrasonic welding characteristic, the welding cannot be carried out or the welding can be carried out off after long welding time), the penetration burr after welding is too large, the tension of a pole piece foil and a pole lug is not enough, the discharge current is not enough in the formation discharge process, the resistance is too large, and the like.

In view of this, it is very important to design and manufacture a laser welding tab device which adopts non-contact welding, does not need to replace a welding head like ultrasonic welding, and can effectively ensure indexes such as a virtual welding rate, a residual rate after welding, tension and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laser welding utmost point ear equipment, it adopts non-contact welding, need not like ultrasonic welding need change the bonding tool, and can effectively guarantee the weak point welding rate, weld indexes such as remaining rate, pulling force after.

The utility model is realized by adopting the following technical scheme.

The utility model provides a laser welding utmost point ear equipment, including organism, automatic unwinding device, automatic winding device, drive arrangement and utmost point ear laser welding device, automatic unwinding device sets up on the organism for bear and unreel the pole piece coil stock, automatic winding device sets up on the organism, be used for bearing rolling pole piece coil stock, drive arrangement sets up between automatic unwinding device and automatic winding device, be used for driving the pole piece by automatic unwinding device to the motion of automatic winding device, utmost point ear laser welding device sets up on the organism, be used for carrying out laser welding to the pole piece.

Further, utmost point ear laser welding device includes the base, welding jig, utmost point ear conveying component and laser welding piece, and the base setting is on the organism and has the pole piece and load the position, and utmost point ear conveying component is connected with the base for load the position to the pole piece and carry utmost point ear, and welding jig sets up on the organism and sets up with the base relatively, is used for the pressfitting to load on the position and make utmost point ear and pole piece laminating together at the pole piece, and laser welding piece sets up on welding jig, is used for welding utmost point ear and pole piece together of laminating.

Further, welding jig includes mounting bracket, pressfitting piece and driving piece, and the mounting bracket setting is on the organism, and the driving piece setting is connected on the mounting bracket and with the transmission of pressfitting piece, and the pressfitting piece setting is in the top of base and with pole piece loading position relative setting for the pressfitting is on pole piece loading position or break away from pole piece loading position under the drive of driving piece.

Furthermore, an air blowing channel is arranged in the laminating block, and the air blowing channel extends downwards to the bottom of the laminating block and is used for blowing air to the pole piece loading position so as to enable the pole lug to be attached to the pole piece.

Furthermore, the welding fixture further comprises dust removal pipelines arranged on two sides of the pressing block, air outlet grooves are formed in two sides of the bottom of the pressing block and communicated with the air blowing channel, and the dust removal pipelines are communicated with the air outlet grooves.

Furthermore, the air blowing channel penetrates through the pressing block upwards, a lens is arranged at the top of the air blowing channel and is in sealing connection with the side wall of the air blowing channel, and the laser welding piece is arranged above the lens.

Further, the laser welding lug equipment also comprises a tension control device, wherein the tension control device is arranged on the machine body and positioned on the conveying path of the pole piece and used for tensioning the pole piece in a floating mode.

Furthermore, the laser welding lug equipment also comprises a transverse brushing device which is arranged on the machine body and positioned on the conveying path of the pole piece and used for brushing the two surfaces of the pole piece.

Furthermore, laser welding utmost point ear equipment still includes air knife dust collector, and air knife dust collector sets up on the organism and is located utmost point ear laser welding device's discharge side for blow away the dust that welds the production on the pole piece.

Furthermore, laser welding utmost point ear equipment still includes the rubberizing device, and the rubberizing device sets up on the organism and is located air knife dust collector's discharge side for carry out the rubberizing to the pole piece after the welding.

The utility model discloses following beneficial effect has:

the utility model provides a pair of laser welding utmost point ear equipment through setting up automatic unwinding device and automatic winding device on the organism, realizes unreeling and the rolling of pole piece, simultaneously through drive arrangement drive pole piece motion to carry out laser welding to the pole piece through utmost point ear laser welding device. Compared with the prior art, the utility model provides a pair of laser welding utmost point ear equipment through laser welding's mode, adopts non-contact welding, need not like ultrasonic welding to need to change the bonding tool, and can effectively guarantee the virtual welding rate, weld indexes such as residual rate, pulling force after, solves the welding problem that ultrasonic welding brought.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an overall structure of a laser welding tab device according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of the laser welding apparatus for electrode tabs in FIG. 1;

FIG. 3 is a schematic view of a partial structure of the laser welding apparatus for the electrode tab of FIG. 2;

FIG. 4 is a schematic view of the welding fixture of FIG. 2 from a first perspective;

FIG. 5 is a schematic view of the welding fixture of FIG. 2 from a second perspective;

FIG. 6 is a schematic structural diagram of the base in FIG. 2;

fig. 7 is one of schematic structural diagrams of the automatic unwinding device in fig. 1;

fig. 8 is a second schematic structural view of the automatic unwinding device in fig. 1;

FIG. 9 is a schematic view of the tension control device of FIG. 1;

FIG. 10 is a schematic view of the transverse brushing device of FIG. 1;

FIG. 11 is a schematic structural view of the air knife dust removing device in FIG. 1;

fig. 12 is a schematic structural view of the adhesive applying apparatus in fig. 1.

Icon: 100-laser welding of a tab device; 110-body; 111-a mounting plate; 120-automatic unwinding device; 121-unwinding inflatable shaft; 123-an unreeling driving piece; 125-unwinding a transmission shaft; 130-automatic winding device; 140-a drive device; 150-tab laser welding device; 151-a base; 1511-vacuum adsorption plate; 153-welding jig; 1531-a mounting frame; 1533-a press-fit block; 1534-welding the platen; 1535-a drive; 1536-lens; 1537-an insufflation tube; 1538-a dust removal line; 1539-air outlet slot; 155-a tab transport assembly; 1551-a carriage; 1553-conveying wheel; 1555-conveying member; 157-laser weld; 160-tension control means; 161-servo motor; 163-motor mount; 165-a tension roller frame; 170-transverse brushing device; 171-mesh plate; 180-air knife dust removal device; 181-air knife blowing block; 190-rubberizing devices.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1 in combination, a laser welding tab device 100 welds pole pieces by laser welding, has good welding effect, adopts non-contact welding, does not need to replace a welding head like ultrasonic welding, and can effectively ensure indexes such as a virtual welding rate, a residual rate after welding, tension and the like.

The laser welding tab device 100 provided by the embodiment, which comprises a machine body 110, an automatic unreeling device 120, an automatic reeling device 130, a driving device 140, a tab laser welding device 150, a tension control device 160, a transverse brushing device 170, an air knife dust removal device 180 and a rubberizing device 190, the automatic unreeling device 120 is arranged on the machine body 110, and is used for bearing and unreeling a pole piece coil stock, the automatic reeling device 130 is arranged on the machine body 110, and is used for bearing and reeling the pole piece coil stock, the driving device 140 is arranged between the automatic unreeling device 120 and the automatic reeling device 130, and is used for driving the pole piece to move from the automatic unreeling device 120 to the automatic reeling device 130, the tab laser welding device 150 is arranged on the machine body 110, and is used for. A tension control device 160 is disposed on the body 110 and in the transport path of the pole pieces for floatingly tensioning the pole pieces. The transverse brushing device 170 is disposed on the machine body 110 and located on the conveying path of the pole piece, and is used for brushing the two surfaces of the pole piece. The air knife dust removal device 180 is arranged on the machine body 110 and located on the discharge side of the tab laser welding device 150, and is used for blowing away dust generated by welding on the pole piece. The rubberizing device 190 is disposed on the machine body 110 and located on the discharge side of the air knife dust collector 180, and is used for rubberizing the welded pole pieces.

In this embodiment, the machine body 110 has a mounting plate 111, a plurality of components are mounted on the mounting plate 111, the pole pieces are conveyed on one side of the mounting plate 111, and the other side is mounted with a power component or an air supply and other energy supplying devices. The installation positions of the automatic unreeling device 120, the automatic reeling device 130, the driving device 140, the tab laser welding device 150, the tension control device 160, the transverse brushing device 170, the air knife dust removal device 180 and the rubberizing device 190 on the installation plate 111 are not specifically limited, and in addition, the two tension control devices 160 are respectively arranged on the discharging side of the automatic unreeling device 120 and the feeding side of the automatic reeling device 130, so that tension control is performed on unreeling and reeling processes.

In this embodiment, the tab laser welding device 150 is disposed at the front end of the mounting plate 111, the rear end of the tab laser welding device is sequentially provided with the air knife dust removing device 180, the plurality of staggered rubberizing devices 190 and the driving devices 140, and the transverse brushing device 170, specifically, the number of the rubberizing devices 190 is three, the number of the driving devices 140 is four, the three rubberizing devices 190 are arranged at intervals, the discharge side of each rubberizing device 190 is provided with one driving device 140, meanwhile, the discharge end of the air knife dust removing device 180 is also provided with one driving device 140, pole pieces are driven to be conveyed through the plurality of driving devices 140, and the conveying effect and stability are ensured. The plurality of gluing devices 190 can respectively glue different parts, and the specific gluing principle can be referred to the existing gluing device 190.

Referring to fig. 2 to 6 in combination, the tab laser welding device 150 includes a base 151, a welding fixture 153, a tab conveying assembly 155 and a laser welding part 157, the base 151 is disposed on the machine body 110 and has a pole piece loading position, the tab conveying assembly 155 is connected to the base 151 for conveying a tab to the pole piece loading position, the welding fixture 153 is disposed on the machine body 110 and opposite to the base 151 for pressing on the pole piece loading position and bonding the tab and the pole piece together, and the laser welding part 157 is disposed on the welding fixture 153 for welding the tab and the pole piece bonded together.

In this embodiment, a base 151 is detachably disposed at a front end position of the mounting plate 111 by bolts and extends outward, and a tab feeding assembly 155 is mounted at an end portion of the base 151 extending outward for feeding a tab to a pole piece loading position.

The pole lug conveying assembly 155 comprises a conveying frame 1551, a conveying wheel 1553 and a conveying piece 1555, a pole lug is wound on the conveying wheel 1553, the conveying piece 1555 is installed on the conveying frame 1551 and is in transmission connection with the conveying wheel 1553, the conveying frame 1551 is installed at the end part, extending outwards, of the base 151 and extends upwards, and a plurality of roller wheels are further arranged on the conveying frame 1551, so that the pole lug can be conveniently conveyed from the conveying wheel 1553 to a pole piece loading position on the base 151.

Specifically, be provided with vacuum adsorption plate 1511 on the base 151, seted up a plurality of vacuum adsorption holes on the vacuum adsorption plate 1511, can adsorb the pole piece and fix on the bottom plate, can fix the position of pole piece and utmost point ear before the welding, pole piece and utmost point ear position are unchangeable when making things convenient for welding jig 153 pressfitting. Meanwhile, the vacuum adsorption plate 1511 still keeps adsorption action in the welding process, and assists in fixing the pole piece and the pole lug.

The welding fixture 153 includes an installation frame 1531, a pressing block 1533, and a driving member 1535, the installation frame 1531 is disposed on the machine body 110, the driving member 1535 is disposed on the installation frame 1531 and is in transmission connection with the pressing block 1533, the pressing block 1533 is disposed above the base 151 and is opposite to the pole piece loading position, and is configured to be pressed onto the pole piece loading position or separated from the pole piece loading position under the driving of the driving member 1535.

In this embodiment, the mounting frame 1531 is fixed on the machine body 110 by bolts and located above the base 151, and the driving member 1535 is a cylinder for pushing the pressing block 1533 to move up and down in the vertical direction, so as to press the pressing block 1533 on the pole piece loading position or separate from the pole piece loading position. Of course, the driving member 1535 may be other driving members 1535, such as a hydraulic cylinder or an electric push rod, and is not limited in detail.

Specifically, a driving plate is fixedly arranged on the mounting frame 1531, a bearing plate is fixedly sleeved outside the pressing block 1533, the bearing plate is parallel to the driving plate, and the bearing plate is connected with an output shaft of the driving part 1535, and the bearing plate moves up and down relative to the driving plate under the driving of the driving part 1535.

An air blowing channel is arranged in the press-fit block 1533, and the air blowing channel extends downward to the bottom of the press-fit block 1533 and is used for blowing air to the pole piece loading position, so that the pole tab is attached to the pole piece. Specifically, the pressing block 1533 is further provided with an air tube, which extends into the pressing block 1533 and is communicated with the air blowing channel for supplying air into the air blowing channel.

Further, the welding fixture 153 further includes dust removing pipes 1538 disposed at two sides of the pressing block 1533, two sides of the bottom of the pressing block 1533 are provided with air outlet grooves 1539, the air outlet grooves 1539 are communicated with the air blowing channel, and the dust removing pipes 1538 are communicated with the air outlet grooves 1539.

In this embodiment, the air blowing pipe 1537 is arranged in the vertical direction, and is a sealing structure, the air pipe is introduced from the middle upper part of the air blowing channel, high-pressure air is introduced into the air blowing pipe 1537, and the high-pressure air is blown downwards through the air blowing channel, the high-pressure air flows into the dust removing pipe 1538 through the air blowing grooves on both sides, on one hand, an air flow from top to bottom can be formed on the surfaces of the pole piece and the pole lug, so that the pole piece and the pole lug can be attached together, on the other hand, dust generated by welding can be blown into the dust removing pipe 1538, and a dust collecting effect is achieved.

It should be noted that the internal air pressure is discharged from the top to the bottom through the pressing block 1533 at two sides, and the air pressure ensures the pressing force between the pole piece foil and the tab. Laser light-emitting welds in pole piece foil and utmost point ear laminating department, and the energy can lead to the foil welding to produce the deformation in the welding process, and foil and utmost point ear laminating are guaranteed to inside atmospheric pressure, can compensate because the foil that laser energy leads to warp, hunch-up, clearance, guarantee utmost point ear and pole piece foil district and laminate completely, improve welding quality.

In this embodiment, the blowing channel extends upward through the pressing block, and the top of the blowing channel is provided with a lens 1536, the lens 1536 is connected with the side wall of the blowing channel in a sealing manner, and the laser welding piece 157 is arranged above the lens 1536. Specifically, the laser welding part 157 includes a laser emitter, and the laser emitter emits laser, and penetrates through the lens 1536 and then directly irradiates on the pole piece loading position, thereby realizing welding of the pole piece and the tab.

The bottom of the pressing block 1533 is provided with a welding pressing plate 1534, the pressing block 1533 is in transmission connection with the driving mechanism, and the welding pressing plate 1534 is provided with a welding through hole, and the welding through hole is opposite to the air blowing channel. Specifically, the pressing block 1533 is rectangular, the welding pressing plate 1534 is fixed to the bottom of the pressing block 1533 by bolts, and the welding pressing plate 1534 surrounds the bottom of the air outlet groove 1539 and is used for guiding the high-pressure air in the air blowing channel to the dust removing duct 1538.

In this embodiment, the welding pressing plate 1534 is provided with a positioning pin, the bottom of the pressing block 1533 is provided with a pin hole, the positioning pin is matched with the pin hole, the side wall of the pressing block 1533 is further provided with a pin locking hole communicated with the pin hole, a locking pin is arranged in the pin locking hole, and the locking pin extends into the pin hole and abuts against the positioning pin. The positioning pins are used for aligning the welding pressing plate 1534 and the pressing block 1533, and the locking pins are arranged, so that the positioning pins can be prevented from being pulled out during disassembly, and the pressing block 1533 and the welding pressing plate 1534 can be kept relatively fixed.

In this embodiment, the middle of the welding pressing plate 1534 is provided with a stepping opening corresponding to the air blowing channel on the upper portion, and the welding pressing plate 1534 is pressed on the pole piece and the pole lug, where the stepping opening is a welding action position, so that the laser can pass through the air blowing channel and act on the pole piece and the pole lug to complete the laser welding operation.

Referring to fig. 7 and 8 in combination, in this embodiment, the automatic unwinding device 120 includes an unwinding air-expanding shaft 121, an unwinding driving member 123 and an unwinding transmission shaft 125, the unwinding transmission shaft 125 is rotatably installed on the mounting plate 111 of the machine body 110, the unwinding driving member 123 is in transmission connection with the unwinding transmission shaft 125 and is used for driving the unwinding transmission shaft 125 to rotate, a transmission wheel disc is connected to the rear end of the unwinding transmission shaft 125, the unwinding air-expanding shaft 121 is disposed at the front end of the unwinding transmission shaft 125 and extends out of the mounting plate 111 for placing the unwinding pole piece coil.

It should be noted that other structures of the automatic unwinding device 120, such as a deviation correcting mechanism, are consistent with the conventional unwinding device, and reference may be made to the conventional automatic unwinding device 120 specifically, which is not described herein.

It should be further noted that the automatic winding device 130 includes a winding air shaft, a winding driving mechanism and a winding transmission shaft, the winding transmission shaft is rotatably mounted on the mounting plate 111 of the machine body 110, the winding driving mechanism is in transmission connection with the winding transmission shaft and is used for driving the winding transmission shaft to rotate, the rear end of the winding transmission shaft is connected with a transmission wheel disc, the winding air shaft is arranged at the front end of the winding transmission shaft and extends out of the mounting plate 111 and is used for placing and unwinding the pole piece coil. The structure of the automatic winding device 130 is the same as that of the automatic unwinding device 120.

In this embodiment, the feeding direction of the pole pieces on the mounting plate 111 is from left to right, that is, the automatic unwinding device 120 is located on the left side of the mounting plate 111, and the automatic winding device 130 is located on the right side of the mounting plate 111.

Referring to fig. 9, a tension control device 160 is disposed on the body 110 in the transport path of the pole piece for floatingly tensioning the pole piece. The tension control device 160 comprises a servo motor 161, a motor base 163 and a tension roller frame 165, the motor base 163 is fixedly installed on the installation plate 111, the servo motor 161 is arranged on the motor base 163 and is in transmission connection with the tension roller frame 165, the tension roller frame 165 is pushed through the rotation of the tension servo motor 161 to enable the tension roller frame to float left and right to tension pole pieces, the tension is closed-loop through the tension motor and a driving motor, and the time and the speed of rotary discharging of the unwinding motor are controlled through servo.

It should be noted that, the specific structure of the tension control device 160 can be referred to a conventional tension control mechanism, and is not specifically described here.

Referring to fig. 10, a transverse brushing device 170 is disposed on the machine body 110 and located on the conveying path of the pole piece for brushing both sides of the pole piece. The bottom of the transverse brushing device is provided with the screen plate 171 with a plurality of through holes, and the lower surface of the screen plate 171 is provided with a dust collector, so that the pole piece can efficiently remove dust through the air draft groove during high-speed operation. When the dust collecting device is used, the pole piece passes between the two dust brushing parts, the motor rotates the hairbrush to brush the two surfaces of the pole piece, the dust collecting port generates negative pressure in the groove, and after dust brushed down from the pole piece falls, the dust is sucked away from the through holes of the screen plate 171 by the air draft groove, so that the dust collecting rate is improved. And one of the powder brushing parts is provided with an air cylinder which can adjust the distance between the powder brushing parts.

It should be noted that the specific structure of the transverse brushing device 170 can be referred to the existing brushing device, and will not be described in detail here.

Referring to fig. 11, the air knife dust removing device 180 is disposed on the machine body 110 and located on the discharge side of the tab laser welding device 150, and is used for blowing away dust generated by welding on the pole piece. The pole piece is crossed roller welding position and is set up air knife air blowing piece 181 and dust absorption cavity, and the piece interval of blowing is 0.5 mm-1 mm and forms powerful air current, and the angle is facing to the welding position, and the welding position dust is blown away to the air current, sucks away the dust through the dust absorption cavity of opposite face, and wherein dust absorption cavity mouth area need be far more than air blowing piece area.

It should be noted that, the specific structure of the air knife dust removing device 180 can be referred to the existing air knife dust removing device 180, and will not be described in detail here.

Referring to fig. 12, the rubberizing device 190 is disposed on the machine body 110 and located on the discharge side of the air knife dust collector 180, and is used for rubberizing the welded pole pieces. Specifically, each rubberizing module is rubberized after the induction of the respective sensor, so that the upper surface and the lower surface of a welded tab can be rubberized, a welding area is protected, and the safety problem caused by the fact that a diaphragm is pierced is prevented; and the adhesive can be pasted at the blank position of the pole piece.

It should be noted that, the specific structure of the gluing device 190 can be referred to the existing gluing device 190, and will not be described in detail here.

In summary, the working principle of the laser welding tab apparatus 100 provided by this embodiment is as follows: the pole piece is unreeled through the automatic unreeling device 120, and enters the tab laser welding device 150 for laser welding operation after being stretched through the tension control device 160, and the welding quality is ensured because the laser welding adopts non-contact welding and the tab and the pole piece can be clamped through the welding fixture 153. The welded pole piece is dedusted by the air knife dedusting device 180 and then enters the plurality of rubberizing devices 190 for rubberizing, the driving devices 140 arranged among the plurality of rubberizing devices 190 in an alternating mode drive the pole piece to be conveyed forwards, and finally the rolling action is completed by the automatic rolling device 130 after the pole piece is brushed by the transverse brushing device 170. Compared with the prior art, the laser welding lug equipment 100 provided by the embodiment adopts laser welding, so that the welding quality is high, the welding head does not need to be replaced like ultrasonic welding, and the indexes such as the false welding rate, the residual rate after welding, the tensile force and the like can be effectively ensured. In addition, because adopt welding jig 153 to carry out centre gripping and pressfitting during laser welding, guaranteed that utmost point ear and pole piece can keep laminating in welding process, further promoted welding quality.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a laser welding utmost point ear equipment, its characterized in that, includes organism, automatic unwinding device, automatic winding device, drive arrangement and utmost point ear laser welding device, automatic unwinding device sets up on the organism for bear and unreel the pole piece coil stock, automatic winding device sets up on the organism for bear rolling pole piece coil stock, drive arrangement sets up automatic unwinding device with between the automatic winding device, be used for driving the pole piece by automatic unwinding device to the automatic winding device motion, utmost point ear laser welding device sets up on the organism, be used for right the pole piece carries out laser welding.

2. The laser welding lug equipment as claimed in claim 1, wherein the lug laser welding device comprises a base, a welding fixture, a lug conveying assembly and a laser welding part, the base is arranged on the machine body and provided with a pole piece loading position, the lug conveying assembly is connected with the base and used for conveying a lug to the pole piece loading position, the welding fixture is arranged on the machine body and opposite to the base and used for being pressed on the pole piece loading position and enabling the lug and the pole piece to be attached together, and the laser welding part is arranged on the welding fixture and used for welding the lug and the pole piece which are attached together.

3. The laser welding tab device as claimed in claim 2, wherein the welding fixture includes an installation frame, a pressing block and a driving member, the installation frame is disposed on the machine body, the driving member is disposed on the installation frame and is in transmission connection with the pressing block, the pressing block is disposed above the base and opposite to the pole piece loading position, and is configured to be pressed on the pole piece loading position or separated from the pole piece loading position under the driving of the driving member.

4. The laser welding lug equipment as claimed in claim 3, wherein a blowing channel is arranged in the lamination block, and the blowing channel extends downwards to the bottom of the lamination block and is used for blowing air to the pole piece loading position so as to enable the lug to be attached to the pole piece.

5. The laser welding tab device as claimed in claim 4, wherein the welding fixture further comprises dust removal pipes disposed at two sides of the pressing block, air outlet grooves are disposed at two sides of the bottom of the pressing block, the air outlet grooves are communicated with the air blowing channel, and the dust removal pipes are communicated with the air outlet grooves.

6. The laser welding tab apparatus as claimed in claim 4, wherein the air blowing channel extends upward through the lamination block, and a lens is disposed on the top of the air blowing channel and is hermetically connected to the side wall of the air blowing channel, and the laser welding member is disposed above the lens.

7. The laser weld tab apparatus as claimed in claim 1, further comprising a tension control device disposed on the machine body and on the transport path of the pole pieces for float tensioning the pole pieces.

8. The laser welding lug apparatus as recited in claim 1, further comprising a transverse brushing device disposed on the machine body and located on the conveying path of the pole piece for brushing both sides of the pole piece.

9. The laser welding lug equipment according to claim 1, further comprising an air knife dust removal device, wherein the air knife dust removal device is arranged on the machine body and located on the discharge side of the lug laser welding device and used for blowing away dust generated by welding on the pole piece.

10. The laser welding lug equipment according to claim 9, further comprising a rubberizing device, wherein the rubberizing device is arranged on the machine body and located on the discharge side of the air knife dust removal device, and is used for rubberizing the welded pole pieces.

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