CN115609148A

CN115609148A - Utmost point ear laser welding device

Info

Publication number: CN115609148A
Application number: CN202211419461.3A
Authority: CN
Inventors: 曾洪华; 曾宪武; 杨剑明; 徐旺林
Original assignee: Foshan Teamgiant New Energy Technology Co Ltd
Current assignee: Foshan Teamgiant New Energy Technology Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-01-17
Anticipated expiration: 2042-11-14
Also published as: CN115609148B

Abstract

The application belongs to the technical field of lithium battery production, and discloses a tab laser welding device which comprises a conveying device and two welding devices; the welding device comprises an installation base frame, a three-axis driving mechanism, a galvanometer laser welding machine, a tab pressure head, a CCD camera and a controller, wherein the galvanometer laser welding machine, the tab pressure head and the CCD camera are all arranged on the installation base frame; the three-axis driving mechanism is used for driving the installation base frame to move along three axes; the tab pressure head is used for pressing the aluminum guide row around the tab to be welded under the driving of the three-shaft driving mechanism; the CCD camera is used for shooting an image of a tab to be welded; the controller is used for calculating the relative position of the pole lug to be welded and the galvanometer laser welding machine according to the image and controlling the galvanometer laser welding machine to weld the pole lug to be welded according to the relative position; therefore, automatic welding of the lug of the battery cell module and the aluminum flow guide row can be realized, the labor cost is reduced, and the production efficiency is improved.

Description

Utmost point ear laser welding device

Technical Field

The application relates to the technical field of lithium battery production, in particular to a tab laser welding device.

Background

Some lithium battery module that have now include the casing and set up electric core module 90 in the casing, wherein, electric core module 90 is as shown in fig. 10, include the soft-packaged electrical core 92 that piles up to form by a plurality of electric cores 91, two end plates 93 that set up both ends around soft-packaged electrical core 92 respectively and two plastic baffle 94 that set up in the soft-packaged electrical core 92 left and right sides, wherein, the both ends of every electric core 91 all are provided with utmost point ear 95, be provided with aluminium water conservancy diversion row 96 on every plastic baffle 94, be provided with a plurality of connecting holes on the aluminium water conservancy diversion row 96, every utmost point ear 95 corresponds and passes a connecting hole. In order to ensure reliable electric conduction between the tab 95 and the aluminum busbar 96, the tab 95 and the aluminum busbar 96 need to be welded.

At present, the tab 95 and the aluminum guide bar 96 are welded by a manual welding mode, so that the labor cost is high, and the production efficiency is low.

Disclosure of Invention

An object of this application provides a utmost point ear laser welding device can realize reducing the human cost to the utmost point ear of electric core module and the automatic weld of aluminium water conservancy diversion row, improves production efficiency.

The application provides a tab laser welding device which comprises a conveying device and two welding devices, wherein the conveying device is used for conveying a battery cell module in the front-back direction, the two welding devices are respectively arranged on the left side and the right side of the conveying device, and the two welding devices are respectively used for welding tabs and aluminum guide bars on the left side and the right side of the battery cell module;

the welding device comprises a mounting base frame, a three-axis driving mechanism, a galvanometer laser welding machine, a tab pressure head, a CCD camera and a controller, wherein the galvanometer laser welding machine, the tab pressure head and the CCD camera are all arranged on the mounting base frame, and the three-axis driving mechanism, the galvanometer laser welding machine and the CCD camera are all electrically connected with the controller;

the three-axis driving mechanism is used for driving the mounting base frame to move along the front-back direction, the left-right direction and the up-down direction; a welding vibration lens of the vibration mirror laser welding machine is arranged towards one side of the conveying device; the tab pressure head is used for pressing the aluminum guide row around the tab to be welded under the driving of the three-axis driving mechanism; the CCD camera is used for shooting images of the tabs to be welded; the controller is used for calculating the relative position of the tab to be welded and the galvanometer laser welding machine according to the image and controlling the galvanometer laser welding machine to weld the tab to be welded according to the relative position.

When the welding machine works, the battery cell module is conveyed between the two welding devices by the conveying device, then the two lug pressure heads are pressed to the aluminum guide rows around the lugs to be welded under the driving of the three-shaft driving mechanisms of the two welding devices, after the positions of the lugs to be welded relative to the vibrating mirror laser welding machine are identified by an image identification method, the laser emergent angle of the vibrating mirror laser welding machine is adjusted to weld the lugs to be welded, then the three-shaft driving mechanism drives the installation base frame to move forwards or backwards to the next lug for repeating the process for welding, and the like until all the lugs are welded; thereby realized the utmost point ear of electric core module and the automatic weld of aluminium water conservancy diversion row, reduced the human cost, improved production efficiency.

Preferably, the tab pressing head is arranged on the mounting base frame in a manner of moving left and right, and one side of the tab pressing head, which is opposite to the transportation device, is provided with a compression spring; the compression spring extends along the left-right direction, and two ends of the compression spring are respectively connected with the pole lug pressure head and the mounting base frame.

Through compression spring's spring action, can guarantee on the one hand that utmost point ear pressure head reliably compresses tightly the aluminium water conservancy diversion row, on the other hand can avoid leading to crushing electric core module because the migration distance that installation bed frame removed towards electric core module is too big.

Preferably, a laser ranging sensor is further arranged on the mounting base frame and used for measuring the distance between the tab pressure head and the laser ranging sensor;

and when the controller calculates the relative position of the lug to be welded and the galvanometer laser welding machine according to the image, the controller calculates the relative position according to the image and the distance.

Measuring the distance between a tab pressure head and the laser ranging sensor through a laser ranging sensor, converting the distance into the distance between the tab pressure head and a galvanometer laser welding machine, and further calculating the relative position of the tab to be welded and the galvanometer laser welding machine; thus, the CCD camera only needs to be set as a monocular camera, so that the equipment cost can be reduced.

Preferably, a first travel switch is further arranged on the mounting base frame, and the first travel switch is arranged on one side, facing away from the transportation device, of the tab pressing head;

the controller is further used for controlling the three-axis driving mechanism to stop driving the mounting base frame to move towards the battery cell module when the tab pressure head triggers the first travel switch.

Preferably, the tab pressure head comprises a metal pressure head and a dust collecting shell connected to one side of the metal pressure head close to the galvanometer laser welding machine, and a dust collecting cavity is arranged in the dust collecting shell;

the top of the dust collecting shell is provided with a dust pumping head, the dust pumping head is provided with a dust pumping cavity communicated with the dust collecting cavity, and the dust pumping head is connected with an external dust collecting system;

the metal pressure head comprises a welding window used for exposing the lug to be welded, and the welding window is communicated with the dust collection cavity; an observation window communicated with the dust collection cavity is formed in one side, close to the galvanometer laser welding machine, of the dust collection shell, and the projection of the welding window towards one side of the observation window along the left or right side is completely fallen into the observation window.

Preferably, the top of the dust collecting shell is provided with a bulge part which is upwards bulged to form a transition cavity, the top of the bulge part is in a hemispherical shell shape, and the highest part of the bulge part is provided with a first outlet; the dust extraction head is sleeved on the bulge and is in threaded connection with the bulge.

Preferably, the transportation device comprises a positioning seat for placing the battery cell module, a transportation machine for driving the positioning seat to move along the front-back direction, and a first positioning mechanism arranged above the transportation machine;

the first positioning mechanism comprises two clamping frames and a first driving mechanism, the two clamping frames and the first driving mechanism are arranged on the left side and the right side of the positioning seat respectively, the first driving mechanism is used for driving the two clamping frames to be close to each other or to be away from each other to move, and the two clamping frames are used for clamping the two sides of the positioning seat when being close to each other so as to position the positioning seat.

Preferably, the clamping frame includes two first mounting panels, two gag lever posts and four first flexible drive arrangement that the interval set up around, every the interval is provided with two about all on the first mounting panel first flexible drive arrangement, two the gag lever post extends and is parallel to each other along the fore-and-aft direction, every the both ends of gag lever post all with one first flexible drive arrangement connects, first flexible drive arrangement is used for the drive to correspond the gag lever post reciprocates.

Preferably, the positioning seat comprises a bottom plate, a bearing plate arranged on the upper side of the bottom plate, two clamping plates respectively arranged on the front side and the rear side of the bearing plate, and a clamping plate driving mechanism for driving the two clamping plates to move close to or away from each other; the bearing plate is used for bearing the battery cell module, and the two clamping plates are used for clamping the battery cell module when the battery cell module moves close to each other.

Preferably, the top of the left and right sides of the bottom plate is respectively provided with a positioning convex block, the positioning convex blocks are arranged in a bilateral symmetry mode, the positioning convex blocks are back to one side of the bearing plate and provided with positioning grooves, the left and right sides of the conveyor are respectively provided with a coarse positioning mechanism, the coarse positioning mechanism comprises an embedded part capable of moving left and right and an embedded part driving device used for driving the embedded part to move left and right, and the embedded part is used for clamping the clamping frame to clamp the positioning seat and embedding the positioning grooves to preliminarily position the positioning seat.

Has the advantages that:

the application provides a tab laser welding device, wherein a battery cell module is transported between two welding devices by a transport device, then two tab pressure heads are pressed to an aluminum guide row around a tab to be welded under the drive of a three-shaft driving mechanism of the two welding devices, after the position of the tab to be welded relative to a galvanometer laser welding machine is identified by an image identification method, the laser emergent angle of the galvanometer laser welding machine is adjusted to weld the tab to be welded, then the three-shaft driving mechanism drives a mounting base frame to move forwards or backwards to the next tab to repeat the process for welding, and so on until all tabs are welded; thereby realized the utmost point ear of electric core module and the automatic weld of aluminium water conservancy diversion row, reduced the human cost, improved production efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a tab laser welding device provided in an embodiment of the present application.

Fig. 2 is a schematic structural view of the welding device.

Fig. 3 is a schematic view of a welding device at another angle.

Fig. 4 is a partial cross-sectional view of a tab pressure head.

Fig. 5 is a schematic structural diagram of the first positioning mechanism.

Fig. 6 is a schematic structural diagram of the positioning seat.

Fig. 7 is a using state diagram of the positioning seat.

Fig. 8 is an enlarged view of a portion S in fig. 1.

Fig. 9 is a schematic structural view of the coarse positioning mechanism.

Fig. 10 is a schematic structural diagram of a conventional battery cell module.

Description of the reference symbols: 1. a transportation device; 2. a welding device; 3. mounting a base frame; 301. a slide rail; 4. a three-axis drive mechanism; 5. a galvanometer laser welding machine; 501. welding a vibrating lens; 6. a tab pressing head; 601. a reflective plate; 602. a baffle plate; 603. a metal ram; 6031. welding the window; 604. a dust collecting case; 6041. a dust collection chamber; 6042. an observation window; 6043. a boss portion; 6044. a transition chamber; 6045. a first outlet; 605. a dust extraction head; 6051. a dust extraction cavity; 7. a CCD camera; 8. a compression spring; 9. a laser ranging sensor; 10. a first travel switch; 11. positioning seats; 1101. a base plate; 1102. a bearing plate; 1103. a splint; 1104. a splint drive mechanism; 1105. positioning the bump; 1106. a positioning groove; 12. a conveyor; 13. a first positioning mechanism; 1301. a clamping frame; 1302. a first drive mechanism; 1303. a first mounting plate; 1304. a limiting rod; 1305. a first telescopic driving device; 1306. a fixed mount; 1307. a second telescopic driving device; 14. a coarse positioning mechanism; 1401. an insert; 1402. a telescopic rod; 1403. a guide sleeve; 1404. a proximity sensor; 1405. a connecting frame; 1406. a third telescopic driving device; 1407. a return spring; 1408. a slide hole; 1409. a spring mounting cavity; 1410. a ring-shaped bulge; 90. a battery cell module; 91. an electric core; 92. soft-packaged battery cells; 93. an end plate; 94. a plastic separator; 95. a tab; 96. and (4) aluminum flow guide rows.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

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 or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.

For convenience of description, herein, the front-rear direction refers to a transportation direction of the cell module 90, the left-right direction refers to a direction horizontally perpendicular to the front-rear direction, and the up-down direction refers to a direction perpendicular to the front-rear direction and the left-right direction.

Referring to fig. 1 to 9, in some embodiments of the present application, a tab laser welding apparatus includes a transportation device 1 configured to transport a battery cell module 90 in a front-back direction, and two welding devices 2 respectively disposed at left and right sides of the transportation device 1, where the two welding devices 2 are respectively configured to weld a tab 95 and an aluminum guide row 96 at left and right sides of the battery cell module 90 (that is, the tab 95 is welded to the corresponding aluminum guide row 96);

the welding device 2 comprises an installation base frame 3, a three-axis driving mechanism 4, a galvanometer laser welding machine 5, a tab pressure head 6, a CCD camera 7 and a controller (not shown in the figure), wherein the galvanometer laser welding machine 5, the tab pressure head 6 and the CCD camera 7 are all arranged on the installation base frame 3, and the three-axis driving mechanism 4, the galvanometer laser welding machine 5 and the CCD camera 7 are all electrically connected with the controller;

the three-axis driving mechanism 4 is used for driving the mounting base frame 3 to move along the front-back direction, the left-right direction and the up-down direction; a welding vibration lens 501 of the vibration mirror laser welding machine 5 is arranged towards one side of the transportation device 1; the tab pressing head 6 is used for pressing the aluminum guide row 96 around the tab 95 to be welded under the driving of the three-axis driving mechanism 4; the CCD camera 7 is used to photograph an image of the tab 95 to be welded; the controller is configured to calculate a relative position between the tab 95 to be welded and the galvanometer laser welder 5 according to the image (a specific calculation method is the prior art, and details thereof are not described here), and control the galvanometer laser welder 5 to weld the tab 95 to be welded according to the relative position (by controlling an emitting angle of the laser, the laser is accurately located at a target position).

During operation, the transportation device 1 transports the cell module 90 (the two sides of the cell module 90 with the tabs 95 are placed along the left-right direction) between the two welding devices 2, then the two tab pressure heads 6 are pressed to the aluminum diversion rows 96 around the tabs 95 to be welded under the driving of the three-axis driving mechanisms 4 of the two welding devices 2 (so that the aluminum diversion rows 96 are tightly attached to the soft-package cell 92, and an overlarge gap is avoided between the welded aluminum diversion rows 96 and the soft-package cell 92), after the positions of the tabs 95 to be welded relative to the galvanometer laser welding machine 5 are identified by an image identification method (in the prior art), the laser emitting angle of the galvanometer laser welding machine 5 is adjusted to weld the tabs 95 to be welded, then the three-axis driving mechanism 4 drives the mounting base frame 3 to move forwards or backwards to the next tab 95 to repeat the above process for welding, and so on until the welding of all the tabs 95 is completed; thereby realized utmost point ear 95 of electricity core module 90 and the automatic weld of aluminium water conservancy diversion row 96, reduced the human cost, improved production efficiency.

In some preferred embodiments, see fig. 3, the tab pressing head 6 is arranged on the mounting base frame 3 in a manner of moving left and right, and a compression spring 8 is arranged on one side of the tab pressing head 6 facing away from the transportation device 1; the compression spring 8 extends along the left and right direction, and two ends of the compression spring are respectively connected with the tab pressing head 6 and the mounting base frame 3. Through compression spring 8's spring action, can guarantee on the one hand that utmost point ear pressure head 6 reliably compresses tightly aluminium water conservancy diversion row 96, on the other hand can avoid leading to crushing electric core module 90 because the migration distance that installation bed frame 3 removed towards electric core module 90 is too big.

Specifically, referring to fig. 3, two slide rails 301 extending in the left-right direction are disposed on the mounting base frame 3, and the tab pressing head 6 is slidably connected to the two slide rails 301 through a sliding block.

In some embodiments, the CCD camera 7 is a binocular camera, so that the relative position (being a three-dimensional position) of the tab 95 to be welded and the galvanometer laser welder 5 can be directly obtained through image recognition of the tab 95 to be welded.

In some embodiments, see fig. 2, a laser distance measuring sensor 9 is further disposed on the mounting base frame 3, and the laser distance measuring sensor 9 is used for measuring the distance between the tab pressing head 6 and the laser distance measuring sensor 9;

when calculating the relative position of the tab 95 to be welded and the galvanometer laser welder 5 from the image of the tab 95 to be welded, the controller calculates the relative position from the image and the distance (specifically, calculates a plane coordinate from the image, calculates a depth coordinate from the distance, so that the plane coordinate and the depth coordinate constitute a three-dimensional relative position). The distance between the tab pressure head 6 and the laser ranging sensor 9 is measured through the laser ranging sensor 9 and can be converted into the distance between the tab pressure head 6 and the galvanometer laser welding machine 5 (because the relative position between the galvanometer laser welding machine 5 and the laser ranging sensor 9 is fixed and known, the distance between the tab pressure head 6 and the laser ranging sensor 9 can be converted into the distance between the tab pressure head 6 and the laser ranging sensor 5 according to the relative position between the galvanometer laser welding machine 5 and the laser ranging sensor 9 so as to obtain a depth coordinate), and the relative position between the tab 95 to be welded and the galvanometer laser welding machine 5 is further calculated; thus, the CCD camera 7 only needs to be set as a monocular camera, so that the equipment cost can be reduced (the total cost of the monocular camera and the laser range sensor 9 is lower relative to the binocular camera).

Wherein, can set up the reflecting plate 601 that is used for reflecting laser rangefinder sensor 9's emergent light at utmost point ear pressure head 6 top to, laser rangefinder sensor 9's position is just setting up reflecting plate 601, and at this moment, laser rangefinder sensor 9 is higher than the welding and shakes the top of camera lens 501, consequently can not shelter from the emergent light of welding camera lens 501.

The three-axis driving mechanism 4 may be a linear motor type three-axis driving device, a lead screw type three-axis driving device, a belt type three-axis driving device, a chain type three-axis driving device, or the like, which is not limited herein.

Further, as shown in fig. 2, a first travel switch 10 is further disposed on the mounting base frame 3, and the first travel switch 10 is disposed on a side of the tab pressing head 6 facing away from the transportation device 1;

the controller is also used for controlling the three-axis driving mechanism 4 to stop driving the installation base frame 3 to move towards the battery cell module 90 when the tab pressing head 6 triggers the first travel switch 10.

During operation, triaxial actuating mechanism 4 adjusts the upper and lower position of installation bed frame 3 earlier, make the upper and lower position looks adaptation of utmost point ear pressure head 6 and utmost point ear 95, then drive installation bed frame 3 removes towards electric core module 90, make utmost point ear pressure head 6 press on aluminium water conservancy diversion row 96, because stopping of aluminium water conservancy diversion row 96, utmost point ear pressure head 6 slides relative installation bed frame 3, thereby finally trigger first travel switch 10, controller control triaxial actuating mechanism 4 stops this moment, avoid installing 3 excessive movements of bed frame and finally make electric core module 90 impaired.

Wherein, a blocking piece 602 for triggering the first travel switch 10 can be arranged on the top of the tab pressing head 6, so that the blocking piece 602 is arranged opposite to the first travel switch 10.

In some preferred embodiments, as shown in fig. 2, 3 and 4, the tab pressing head 6 comprises a metal pressing head 603 and a dust collecting housing 604 connected to one side of the metal pressing head 603 close to the galvanometer laser welding machine 5, wherein a dust collecting cavity 6041 is arranged in the dust collecting housing 604;

the top of the dust collecting shell 604 is provided with a dust pumping head 605, the dust pumping head 605 is provided with a dust pumping cavity 6051 communicated with a dust collecting cavity 6041, and the dust pumping head 605 is connected with an external dust collecting system;

the metal pressure head 603 comprises a welding window 6031 for exposing a tab 95 to be welded, and the welding window 6031 is communicated with a dust collection cavity 6041; an observation window 6042 (see fig. 3) communicated with a dust collection cavity 6041 is arranged on one side of the dust collection shell 604 close to the galvanometer laser welding machine 5, and the projection of the welding window 6031 towards one side of the observation window 6042 along the left or right direction is completely fallen into the observation window 6042.

When the tab pressing head 6 presses the aluminum guide row 96, the metal pressing head 603 presses the aluminum guide row 96, so that heat on the aluminum guide row 96 can be transferred to the metal pressing head 603 during welding, the temperature of the aluminum guide row 96 is reduced, the problem that the tab 95 is deformed due to overlarge length change of the aluminum guide row 96 caused by expansion with heat and contraction with cold is avoided, and the metal pressing head 603 is preferably made of copper, so that more heat can be absorbed. During the welding process, smoke is generated and can diffuse into the dust collecting shell 604 to be pumped away by the dust pumping head 605, so that the smoke is prevented from polluting the workshop environment.

In some embodiments, as shown in fig. 4, the top of the dust collecting housing 604 is provided with a protrusion 6043 protruding upwards to form a transition cavity 6044, and the top of the protrusion 6043 is in a shape of a hemispherical shell and is provided with a first outlet 6045 at the highest position; the dust extraction head 605 is sleeved on the protrusion 6043 and is in threaded connection with the protrusion 6043 (specifically, an external thread is provided on the outer peripheral surface of the protrusion 6043, and a corresponding internal thread is provided on the inner side surface of the dust extraction head 605 and is connected with the external thread through the internal thread). Therefore, when the smoke particles (larger particles) are not extracted, the smoke particles can fall into the gap between the boss 6043 and the inner wall of the dust extraction head 605, the user can open the dust extraction head 605 regularly for cleaning, and the smoke particles which are not extracted can be effectively prevented from falling back into the dust collection cavity 6041 again and then overflowing from the dust collection cavity 6041.

In order to prevent the smoke from overflowing through the observation window 6042, a transparent plate may be disposed at the observation window 6042, so that the laser light can pass through the transparent plate and the smoke cannot overflow.

Preferably, the top of the suction head 605 is truncated cone-shaped, see fig. 4, to improve the smoothness of the suction process, and the highest of the top is provided with a connection nozzle for connection with an external suction system.

Specifically, referring to fig. 1, 5 to 7, the transportation device 1 includes a positioning seat 11 for placing the battery cell module 90, a transporter 12 for driving the positioning seat 11 to move in the front-back direction, and a first positioning mechanism 13 disposed above the transporter 12;

the first positioning mechanism 13 includes two clamping frames 1301 and a first driving mechanism 1302 that set up respectively in the left and right sides of the positioning seat 11, and the first driving mechanism 1302 is used for driving two clamping frames 1301 to be close to each other or keep away from each other and move, and two clamping frames 1301 are used for clamping the both sides of the positioning seat 11 when being close to each other in order to fix a position the positioning seat 11.

During operation, the positioning seat 11 with the battery cell module 90 placed is conveyed to the position between the two clamping frames 1301 by the conveyer 12, then the two clamping frames 1301 are close to each other to clamp the positioning seat 11, positioning is achieved, and then the triaxial drive mechanism 4 drives the galvanometer laser welding machine 5 to move for welding.

Further, see fig. 5, the clamping frame 1301 includes two first mounting plates 1303 that set up at a distance from one another, two gag lever posts 1304 and four first flexible drive arrangement 1305, and the interval is provided with two first flexible drive arrangement 1305 from top to bottom on every first mounting plate 1303, and two gag lever posts 1304 extend and are parallel to each other along the fore-and-aft direction, and the both ends of every gag lever post 1304 all are connected with a first flexible drive arrangement 1305, and first flexible drive arrangement 1305 is used for driving corresponding gag lever post 1304 to reciprocate. During operation, two enough positioning seats 11 of initial distance between the tight frame 1301 of clamp pass through, according to electric core module 90's actual size, adjust the distance between two gag lever posts 1304 to guarantee can not shelter from utmost point ear 95 and aluminium water conservancy diversion and arrange 96, it is between two tight frames 1301 of clamp to remove to the positioning seat 11, two tight frames 1301 of clamp are close to each other and remove, thereby two gag lever posts 1304 are respectively from utmost point ear 95 and aluminium water conservancy diversion and arrange upside and downside clamping positioning seat 11 of 96, and avoid hindering welding laser. Because the distance between two gag lever posts 1304 is adjustable, consequently, applicable in not unidimensional electric core module 90's welding, the suitability is higher.

The first telescopic driving device 1305 may be, but is not limited to, an air cylinder, a hydraulic cylinder, an electric telescopic rod, and the like.

Further, the first driving mechanism 1302 includes two fixed frames 1306, and two second telescopic driving devices 1307 are provided on each fixed frame 1306, and the two second telescopic driving devices 1307 are respectively connected with the two clamping frames 1301 (specifically, connected with the first mounting plates 1303 of the clamping frames 1301). The second telescopic driving device 1307 may be, but not limited to, an air cylinder, a hydraulic cylinder, an electric telescopic rod, etc. The fixing frame 1306 is fixedly connected with the frame of the transportation device 1.

In this embodiment, referring to fig. 6, the positioning seat 11 includes a bottom plate 1101, a supporting plate 1102 disposed on an upper side of the bottom plate 1101, two clamping plates 1103 disposed on front and rear sides of the supporting plate 1102, respectively, and a clamping plate driving mechanism 1104 for driving the two clamping plates 1103 to move closer to or away from each other; the bearing plate 1102 is used for bearing the cell module 90, and the two clamp plates 1103 are used for clamping the cell module 90 when being close to each other and moving. During the use, place electric core module 90 on bearing board 1102, make electric core module 90 have

utmost point ear

95 and 96 both sides of aluminium water conservancy diversion row and place along left right direction, and the both ends that have end plate 93 are placed along the fore-and-aft direction, then two splint 1103 are close to each other and are removed in order to press from both sides tight electric core module 90, the applicable not unidimensional transportation of electric core module 90 of this positioning seat 11.

The clamping plate driving mechanism 1104 may be, but not limited to, a linear motor type driving mechanism, a cylinder type driving mechanism, a hydraulic cylinder type driving mechanism, a screw rod type driving mechanism, etc.; for example, in fig. 6, the clamping plate driving mechanism 1104 is a screw driving mechanism, which includes a bidirectional screw provided with two opposite threaded portions, two screw nuts respectively connected with the two threaded portions and respectively fixedly connected with the two clamping plates 1103, and a screw driving motor for driving the bidirectional screw to rotate, so that when the screw driving motor rotates, the two clamping plates 1103 can be driven to move closer to or away from each other.

In some preferred embodiments, referring to fig. 1, 6, and 8, the top of each of the left and right sides of the bottom plate 1101 is provided with one positioning protrusion 1105, the two positioning protrusions 1105 are symmetrically arranged left and right, one side of the positioning protrusion 1105, which faces away from the supporting plate 1102, is provided with a positioning groove 1106, each of the left and right sides of the transporter 12 is provided with one coarse positioning mechanism 14, each coarse positioning mechanism 14 comprises an insert 1401 capable of moving left and right and an insert driving device for driving the insert 1401 to move left and right, and the insert 1401 is used for being inserted into the positioning groove 1106 before the clamping frame 1301 clamps the positioning seat 11 to perform initial positioning on the positioning seat 11.

During operation, when the positioning seat 11 moves to the positioning groove 1106 and aligns with the insert 1401, the two inserts 1401 are driven by the corresponding insert driving device to extend into the corresponding positioning groove 1106 to preliminarily position the positioning seat 11, so that the positioning seat 11 is prevented from continuously moving (the positioning seat 11 is directly placed on the conveyor 12 and is not fixedly connected with the conveyor 12), and then the first positioning mechanism 13 is restarted to clamp and position the positioning seat 11, and at this time, the insert 1401 can be reset. Through the preliminary positioning of the insert 1401, the position of the positioning seat 11 after clamping and positioning can be ensured to match with the initial position of the galvanometer laser welding machine 5, and the initial alignment time of the galvanometer laser welding machine 5 (i.e. the time required for the alignment process of aligning the first target tab) is reduced.

In some embodiments, see fig. 8 and 9, the insert 1401 is a roller, the insert driving device includes a telescopic rod 1402, a guide sleeve 1403, a proximity sensor 1404, a connection frame 1405 and a third telescopic driving device 1406, the insert 1401 is rotatably connected to one end of the telescopic rod 1402, the other end of the telescopic rod 1402 is slidably inserted into the guide sleeve 1403, a return spring 1407 is disposed in the guide sleeve 1403, the return spring 1407 is used for providing an elastic force to the telescopic rod 1402, the elastic force is directed to one side of the positioning seat 11, the proximity sensor 1404 is disposed at an end of the guide sleeve 1403, the end of the telescopic rod 1402, the end of the telescopic rod 1405, the end of the telescopic rod is far away from the insert 1401 is used for triggering the proximity sensor 1404, the connection frame 1405 is connected to the guide sleeve 1403 and the third telescopic driving device 1406, and the third telescopic driving device 1406 drives the guide sleeve 1403 to move left and right through the connection frame 1406. The third telescopic driving device 1406 may be, but is not limited to, an air cylinder, a hydraulic cylinder, an electric telescopic rod, etc.

When the positioning seat 11 moves, the front end of the positioning lug 1105 contacts with the insert 1401 firstly, so as to press the insert 1401, so that the telescopic rod 1402 contracts to trigger the proximity sensor 1404, until the positioning groove 1106 is aligned with the insert 1401, the insert 1401 extends into the positioning groove 1106 under the action of the return spring 1407, at this time, the proximity sensor 1404 changes from a triggering state to a non-triggering state, according to the change of the state, the transport machine 12 stops moving, and the third telescopic driving device 1406 drives the connecting frame 1405 to move towards the positioning seat 11, so as to press the insert 1401 in the positioning groove 1106, thus realizing primary positioning; when the first positioning means 13 is activated, the third telescopic drive 1406 is reset so that the insert 1401 does not obstruct the clamping positioning at the first positioning means 13.

Preferably, the front and rear ends of the side of the positioning lug 1105 away from the support plate 1102 are provided with guiding cambered surfaces (see fig. 8) to avoid the clamping stagnation phenomenon when the positioning lug 1105 is just contacted with the insert 1401.

The guide sleeve 1403 is provided with a sliding hole 1408 penetrating through the guide sleeve 1403 in the left-right direction, a spring installation cavity 1409 is arranged in the middle of the sliding hole 1408, the diameter of the spring installation cavity 1409 is larger than that of the sliding hole 1408, the sliding hole 1408 and the spring installation cavity 1409 are coaxially arranged, a ring-shaped protrusion 1410 is arranged on the peripheral surface of the telescopic rod 1402, the ring-shaped protrusion 1410 is located in the spring installation cavity 1409, the return spring 1407 is arranged in the spring installation cavity 1409, and two ends of the return spring 1407 are respectively connected with the ring-shaped protrusion 1410 and the end surface of the spring installation cavity 1409.

Further, the proximity sensor 1404 is a laser sensor, an infrared sensor, or the like, having a light beam reflective end and a light beam receiving end both aligned with the end of the slide hole 1408 distal from the insert 1401, thereby allowing the light beam to be directed through the slide hole 1408 toward the end of the telescoping rod 1402.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The tab laser welding device is characterized by comprising a conveying device (1) used for conveying a battery cell module (90) in the front-back direction and two welding devices (2) respectively arranged on the left side and the right side of the conveying device (1), wherein the two welding devices (2) are respectively used for welding tabs (95) on the left side and the right side of the battery cell module (90) and an aluminum guide bar (96);

the welding device (2) comprises an installation base frame (3), a three-axis driving mechanism (4), a galvanometer laser welding machine (5), a tab pressure head (6), a CCD camera (7) and a controller, wherein the galvanometer laser welding machine (5), the tab pressure head (6) and the CCD camera (7) are all arranged on the installation base frame (3), and the three-axis driving mechanism (4), the galvanometer laser welding machine (5) and the CCD camera (7) are all electrically connected with the controller;

the three-axis driving mechanism (4) is used for driving the mounting base frame (3) to move along the front-back direction, the left-right direction and the up-down direction; a welding vibration lens (501) of the vibration mirror laser welding machine (5) is arranged towards one side of the conveying device (1); the tab pressing head (6) is used for pressing the aluminum guide row (96) around the tab (95) to be welded under the driving of the three-axis driving mechanism (4); the CCD camera (7) is used for shooting an image of the tab (95) to be welded; the controller is used for calculating the relative position of the tab (95) to be welded and the galvanometer laser welding machine (5) according to the image, and controlling the galvanometer laser welding machine (5) to weld the tab (95) to be welded according to the relative position.

2. The tab laser welding device according to claim 1, characterized in that the tab pressure head (6) is arranged on the mounting base frame (3) so as to be movable to the left and right, and a compression spring (8) is arranged on the side of the tab pressure head (6) facing away from the transport device (1); the compression spring (8) extends along the left-right direction, and two ends of the compression spring are respectively connected with the tab pressing head (6) and the mounting base frame (3).

3. The tab laser welding device according to claim 2, characterized in that a laser distance measuring sensor (9) is further arranged on the mounting base frame (3), and the laser distance measuring sensor (9) is used for measuring the distance between the tab pressure head (6) and the laser distance measuring sensor (9);

and when calculating the relative position of the lug (95) to be welded and the galvanometer laser welding machine (5) according to the image, the controller calculates the relative position according to the image and the distance.

4. The tab laser welding device according to claim 2, characterized in that a first travel switch (10) is further arranged on the mounting base frame (3), and the first travel switch (10) is arranged on the side of the tab pressing head (6) facing away from the transportation device (1);

the controller is further used for controlling the three-shaft driving mechanism (4) to stop driving the mounting base frame (3) to move towards the battery cell module (90) when the tab pressing head (6) triggers the first travel switch (10).

5. The tab laser welding device according to claim 1, characterized in that the tab pressure head (6) comprises a metal pressure head (603) and a dust collection housing (604) connected to one side of the metal pressure head (603) close to the galvanometer laser welding machine (5), and a dust collection cavity (6041) is arranged in the dust collection housing (604);

the top of the dust collection shell (604) is provided with a dust extraction head (605), the dust extraction head (605) is provided with a dust extraction cavity (6051) communicated with the dust collection cavity (6041), and the dust extraction head (605) is connected with an external dust collection system;

the metal pressure head (603) comprises a welding window (6031) used for exposing the lug (95) to be welded, and the welding window (6031) is communicated with the dust collection cavity (6041); the dust collection shell (604) is close to one side of the galvanometer laser welding machine (5) and is provided with an observation window (6042) communicated with a dust collection cavity (6041), and the projection of one side of the observation window (6042) is completely fallen into the observation window (6042) along the left or right direction of the welding window (6031).

6. The tab laser welding device according to claim 5, characterized in that the top of the dust collecting shell (604) is provided with a bulge (6043) which bulges upwards to form a transition cavity (6044), the top of the bulge (6043) is in a semi-spherical shell shape, and the highest part of the bulge is provided with a first outlet (6045); the dust extraction head (605) is sleeved on the bulge part (6043) and is in threaded connection with the bulge part (6043).

7. The tab laser welding device according to claim 1, wherein the transportation device (1) comprises a positioning seat (11) for placing the cell module (90), a conveyor (12) for driving the positioning seat (11) to move in the front-back direction, and a first positioning mechanism (13) arranged above the conveyor (12);

the first positioning mechanism (13) comprises two clamping frames (1301) and a first driving mechanism (1302), wherein the two clamping frames (1301) and the first driving mechanism (1302) are respectively arranged on the left side and the right side of the positioning seat (11), the first driving mechanism (1302) is used for driving the two clamping frames (1301) to move close to each other or away from each other, and the two clamping frames (1301) are used for clamping the two sides of the positioning seat (11) when the two clamping frames are close to each other so as to position the positioning seat (11).

8. The tab laser welding device according to claim 7, wherein the clamping frame (1301) comprises two first mounting plates (1303) arranged at intervals in a front-back direction, two limiting rods (1304) and four first telescopic driving devices (1305), the two first telescopic driving devices (1305) are arranged on each first mounting plate (1303) at intervals in a top-bottom direction, the two limiting rods (1304) extend in the front-back direction and are parallel to each other, two ends of each limiting rod (1304) are connected with one first telescopic driving device (1305), and the first telescopic driving devices (1305) are used for driving the corresponding limiting rods (1304) to move up and down.

9. The tab laser welding apparatus according to claim 7, wherein the positioning seat (11) comprises a base plate (1101), a support plate (1102) disposed on an upper side of the base plate (1101), two clamping plates (1103) disposed respectively on front and rear sides of the support plate (1102), and a clamping plate driving mechanism (1104) for driving the two clamping plates (1103) to move toward and away from each other; the bearing plate (1102) is used for bearing the battery cell module (90), and the clamping plates (1103) are used for clamping the battery cell module (90) when the battery cell module is close to and moves.

10. The tab laser welding device according to claim 9, wherein a positioning protrusion (1105) is disposed on each of the top of the left and right sides of the bottom plate (1101), two positioning protrusions (1105) are symmetrically disposed on the left and right sides, a positioning groove (1106) is disposed on one side of the positioning protrusion (1105) facing away from the supporting plate (1102), a coarse positioning mechanism (14) is disposed on each of the left and right sides of the transporter (12), the coarse positioning mechanism (14) comprises an insert (1401) capable of moving left and right and an insert driving device for driving the insert (1401) to move left and right, and the insert (1401) is configured to be inserted into the positioning groove (1106) to perform primary positioning on the positioning seat (11) before the clamping frame (1301) clamps the positioning seat (11).