CN221538557U

CN221538557U - Butterfly laser welding jig for dry battery cell electrode lug

Info

Publication number: CN221538557U
Application number: CN202323303456.9U
Authority: CN
Inventors: 刘斯顺; 姜涛; 米琢; 郭锋; 陈凯; 王雁雪
Original assignee: Zhejiang Narada Power Source Co Ltd; Hangzhou Nandu Power Technology Co Ltd
Current assignee: Zhejiang Narada Power Source Co Ltd; Hangzhou Nandu Power Technology Co Ltd
Priority date: 2023-12-05
Filing date: 2023-12-05
Publication date: 2024-08-16
Anticipated expiration: 2033-12-05

Abstract

The utility model discloses a butterfly laser welding jig for a dry battery cell tab, which comprises a bottom plate, wherein a battery cell fixing area is arranged on the bottom plate, a front positioning block and a rear positioning block are respectively arranged on the front side and the rear side of the battery cell fixing area, a first battery cell positioning groove, a pin channel and a cover plate positioning groove are arranged on the front positioning block, the first battery cell positioning groove and the pin channel are communicated with the cover plate positioning groove, a second battery cell positioning groove is arranged on the rear positioning block, the upper ends of the first battery cell positioning groove and the second battery cell positioning groove are open, pin guide rods are arranged on the left side and the right side of the battery cell fixing area, and a clamp for fixing the cover plate in the battery cell positioning groove is further arranged. The utility model can support the welding positioning welding cell, provide a supporting welding surface, avoid laser beams, ensure that the welding length area is long enough and large enough, and have higher welding quality and connection strength by utilizing a laser welding machine.

Description

Butterfly laser welding jig for dry battery cell electrode lug

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a butterfly laser welding jig for a dry battery cell tab.

Background

Lithium ion batteries have been widely used in life today, such as in the fields of electric automobiles, smart phones, notebook computers, energy storage base stations, and the like. These applications share the common feature that the battery tab is welded.

The positive and negative poles of the lithium ion battery are provided with lugs (also called electrode slice busbar, electrode slice mother needle or battery barrel clamp), and the battery can be connected with other electrical equipment through the lugs. Before welding, the pole piece lugs and the battery cover plate pins are required to be welded together.

Electrode tab attachment is the most important step in the lithium battery manufacturing process. The connection is not tight or the quality is poor, the performance and the service life of the lithium battery can be directly reduced, and the connection of the electrode plates in the current industry is mainly based on ultrasonic welding. Ultrasonic welding utilizes ultrasonic vibration to fuse the welding, and ultrasonic welding only can weld a small amount of metal at present, has annealing phenomenon to the shape requirement of material is higher, and the welding spot position can not too much in addition, and the welding area can not be too big, and the welding pressure head needs to be pressurized, and the welding tooth wearing and tearing are big, and stability is poor, easily leads to the welding slag to splash, collects the difficulty, influences product quality.

Disclosure of utility model

1. Technical problem to be solved by the utility model

The utility model aims to solve the technical problems in the prior art, and provides a butterfly laser welding jig for a dry battery cell tab, which can support, weld and position a battery cell, provide a welding surface, avoid laser beams, ensure that the welding length area is long enough and large enough, and have higher welding quality and connection strength by utilizing a laser welding machine.

2. Technical proposal

In order to solve the problems, the technical scheme provided by the utility model is as follows:

the utility model provides a dry electric core tab butterfly laser welding tool, includes the bottom plate, be equipped with electric core fixed zone on the bottom plate, electric core fixed zone's front and back both sides are equipped with preceding locating piece and back locating piece respectively, be equipped with first electric core constant head tank, pin passageway and apron constant head tank on the preceding locating piece, first electric core constant head tank with the pin passageway all with apron constant head tank intercommunication, be equipped with the second electric core constant head tank on the back locating piece, the upper end of first electric core constant head tank and second electric core constant head tank is all uncovered, electric core fixed zone's left and right sides all is equipped with pin guide bar, still including be used for with the apron be fixed in the clamp in the electric core constant head tank.

Optionally, a first avoidance groove is formed below the second cell positioning groove by the rear positioning block.

Optionally, the pin guide rod is provided with a pin guide groove and a pin supporting part, and the pin guide groove is arranged close to the pin channel.

Optionally, the pin guide rod is connected to the bottom plate through a pin fixing structure, and the pin fixing structure comprises a pin fixing block connected to the bottom plate; and the pin connecting block is connected with the pin guide rod and detachably connected to the pin fixing block.

Optionally, a second avoidance groove is formed in the end face, close to the cell fixing area, of the pin fixing block.

Optionally, a plurality of positioning sleeves are arranged on the bottom plate.

Optionally, the clamp is a quick clamp, and the quick clamp is connected to the bottom plate through a clamp positioning block.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

The butterfly laser welding jig for the dry battery cell tab can support, weld and position the battery cell, provide a supporting welding surface, avoid laser beams, ensure that the welding length area is long enough and large enough, and have higher welding quality and connection strength by utilizing a laser welding machine. Very fine welding can be achieved, and the energy of the laser beam can be precisely controlled, so that the proper heat input in the welding process is ensured. Compared with ultrasonic welding, laser welding can avoid overheating and annealing of welding materials, thereby improving the strength and reliability of the welded joint. In addition, laser welding passes through the laser beam, does not need to directly contact welding materials, realizes the welding slag collection more easily, provides product quality.

Drawings

Fig. 1 is a schematic structural diagram of a butterfly laser welding fixture for a dry cell tab according to an embodiment of the present utility model;

Fig. 2 is an assembly schematic diagram of a butterfly laser welding fixture for a tab of a dry battery cell, a battery cell and a cover plate according to an embodiment of the utility model;

1. A bottom plate; 1a, a cell fixing area; 2. a front positioning block; 2a, a first cell positioning groove; 2b, pin channels; 2c, a cover plate positioning groove; 3. a rear positioning block; 3a, a second cell positioning groove; 3b, a first avoiding groove; 4. a pin guide bar; 41. pin guide grooves; 42. a pin support part; 5. a clamp; 6. a pin fixing block; 6a, a second avoiding groove; 7. a pin connecting block; 8. a positioning sleeve; 9. and clamping the positioning block.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted," "positioned," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered as being "fixedly connected" to another element, the two elements may be fixed by a detachable connection manner, or may be fixed by a non-detachable connection manner, such as sleeving, clamping, integrally forming, or welding, which may be implemented in the prior art, and thus, the description is not further omitted. When an element is perpendicular or nearly perpendicular to another element, it is meant that the ideal conditions for both are perpendicular, but certain vertical errors may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" as used herein do not denote a particular quantity or order, but rather are used to distinguish one element from another.

Combining with fig. 1 and 2, a dry cell tab butterfly laser welding jig of this embodiment, including bottom plate 1, be equipped with electric core fixed zone 1a on the bottom plate 1, electric core fixed zone 1 a's front and back both sides are equipped with preceding locating piece 2 and back locating piece 3 respectively, be equipped with first electric core constant head tank 2a, pin passageway 2b and apron constant head tank 2c on the preceding locating piece 2, first electric core constant head tank 2a only limits electric core left and right displacement, first electric core constant head tank 2a with pin passageway 2b all with apron constant head tank 2c intercommunication, the groove diameter of apron constant head tank 2c is greater than the groove diameter of first electric core constant head tank 2a, be equipped with second electric core constant head tank 3a on the back locating piece 3a simultaneously restriction electric core front and back and left and right displacement, the electric core passes through preceding locating piece 2 and back are in the locating piece is located on bottom plate 1, first electric core constant head tank 2a and second electric core constant head tank 2a all with the pin passageway 2b all communicates with apron constant head tank 2c, the groove diameter of apron constant head tank 2a is greater than the groove diameter of first electric core constant head tank 2a, be equipped with the guide bar 4 is equipped with the guide pin 3a and is equipped with in the guide pin 4 in the direction, and is equipped with the guide pin 4 in the guide bar is left and right side down.

The working principle of the butterfly laser welding jig for the tab of the dry battery cell is as follows: the battery cell selects two-head electrode lug battery cells and is welded based on a laser welding machine, a cover plate with pins is firstly installed in the jig, wherein the cover plate is attached to a cover plate positioning groove 2c of a front positioning block 2, a pin guide rod 4 is inserted into a cover plate pin, a clamping device 5 is tightly pressed to fully clamp the cover plate, one battery cell is placed into the jig from top to bottom by manual or automatic clamps, the battery cell electrode lug is opposite to the cover plate pin, the rear part of the battery cell is positioned by a second battery cell positioning groove 3a on a rear positioning block, the front part of the battery cell is positioned by a first battery cell positioning groove 2a of the front positioning block 2, the positioned battery cell is welded with two-head electrode lugs of the battery cell by a laser beam emitted by an external laser, the electrode lug is fused with the cover plate pin under the action of the laser beam, the laser beam is not required to be close to the cover plate pin, a dust removing device can be arranged on the periphery of the cover plate pin, and welding slag is prevented; after the electric core welding is finished, the clamping device 5 is manually or automatically opened, the welded electric core and the cover plate are pulled out from the cover plate positioning groove and turned over, then the clamping device 5 is pressed again, another electric core is placed in the clamping device by the manual or automatic clamping device, the electric core lug is opposite to the cover plate pin, the electric core rear part is positioned by means of the second electric core positioning groove 3a on the rear positioning block, the electric core front part is positioned by means of the first electric core positioning groove 2a of the front positioning block 2, the positioned electric core is welded with the two electric core lugs through the laser beam emitted by the external laser, the electric core butterfly welding is finished under the action of the laser beam, the electric core is quickly and conveniently fixed by means of the ingenious welding clamping device, the traditional ultrasonic welding is broken through, and the laser welding machine is utilized to have higher welding quality and connection strength. Very fine welding can be achieved, and the energy of the laser beam can be precisely controlled, so that the proper heat input in the welding process is ensured. Compared with ultrasonic welding, laser welding can avoid overheating and annealing of welding materials, thereby improving the strength and reliability of the welded joint. In addition, laser welding passes through the laser beam, does not need to directly contact welding materials, realizes the welding slag collection more easily, provides product quality. In addition, as the laser energy is large and controllable, the method is more suitable for large-capacity battery cells, improves the energy density of products, improves the safety and reliability of the products, and is beneficial to enhancing the competitiveness of the products in the market.

As an alternative of the present utility model, the rear positioning block 3 is located below the second cell positioning groove 3a, and a first avoiding groove 3b is provided to prevent interference to the cell, and to improve the flatness of the second cell positioning groove 3a when the machining surface is smaller, the machining precision is higher, and the flatness is higher.

As an alternative of the present utility model, the pin guide rod 4 is provided with a pin guide groove 41 and a pin support part 42, the pin guide groove 41 is disposed near the pin channel 2b, the surface of the pin support part 42 is in contact with a pin to serve as a support surface, and the pin support part 4 plays a role in supporting and welding heat conduction.

As an alternative scheme of the utility model, the pin guide rod 4 adopts a rigid part, and has strong rigidity and high toughness.

As an alternative scheme of the utility model, the pin guide rod 4 is connected to the bottom plate 1 through a pin fixing structure, and the pin fixing structure comprises a pin fixing block 6 connected to the bottom plate 1; the pin connecting block 7 is connected with the pin guide rod 4 and detachably connected to the pin fixing block 6, the pin connecting block 7 is connected to the upper end of the pin fixing block 6 and is connected through fasteners such as bolts, and the pin connecting block 7 can be switched according to the size of the battery cell in actual use, does not limit the exertion of laser beams, and is sufficient to meet the welding area of the battery cell.

As an alternative scheme of the utility model, a second avoidance groove 6a is arranged on the end face of the pin fixing block 6, which is close to the cell fixing area 1a, the second avoidance groove 6a is an inward concave bevel angle arranged at the lower end of the side face of the pin fixing block 6, and the second avoidance groove 6a is designed to prevent interference of the cell from entering and exiting and damage of the cell by pulling, so that the risk of short circuit of the cell is avoided.

As an alternative scheme of the utility model, the bottom plate 1 is provided with a plurality of positioning sleeves 8, and the positioning sleeves 8 are copper parts and matched with a workbench, so that the quick positioning and fixing of the jig are realized.

As an alternative to the utility model, the clamping device 5 is a quick clamp, which is known in the art, which is connected to the base plate 1 by a clamp positioning block 9.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. A butterfly laser welding jig for dry battery cell lugs is characterized in that: including the bottom plate, be equipped with electric core fixed zone on the bottom plate, both sides are equipped with preceding locating piece and back locating piece respectively around the electric core fixed zone, be equipped with first electric core constant head tank, pin passageway and apron constant head tank on the preceding locating piece, first electric core constant head tank with the pin passageway all with apron constant head tank intercommunication, be equipped with the second electric core constant head tank on the back locating piece, the upper end of first electric core constant head tank and second electric core constant head tank all is uncovered, the left and right sides of electric core fixed zone all is equipped with the pin guide bar, still including being used for being fixed in the apron the clamp in the electric core constant head tank.

2. The dry cell tab butterfly laser welding jig of claim 1, wherein: the rear positioning block is positioned below the second battery cell positioning groove and is provided with a first avoiding groove.

3. The dry cell tab butterfly laser welding jig of claim 1, wherein: the pin guide rod is provided with a pin guide groove and a pin supporting part, and the pin guide groove is close to the pin channel.

4. The dry cell tab butterfly laser welding jig of claim 1, wherein: the pin guide rod is connected to the bottom plate through a pin fixing structure, and the pin fixing structure comprises

The pin fixing block is connected to the bottom plate;

And the pin connecting block is connected with the pin guide rod and detachably connected to the pin fixing block.

5. The dry cell tab butterfly laser welding jig of claim 4, wherein: and a second avoidance groove is formed in the end face, close to the battery cell fixing area, of the pin fixing block.

6. The dry cell tab butterfly laser welding jig according to any one of claims 1-5, wherein: and a plurality of positioning sleeves are arranged on the bottom plate.

7. The dry cell tab butterfly laser welding jig according to any one of claims 1-5, wherein: the clamp is a quick clamp, and the quick clamp is connected to the bottom plate through a clamp positioning block.