CN219986593U

CN219986593U - Tab welding device

Info

Publication number: CN219986593U
Application number: CN202321067007.6U
Authority: CN
Inventors: 沈志鹏; 陈凯; 李峥; 冯玉川; 何泓材
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-11-10
Anticipated expiration: 2033-05-06

Abstract

The utility model belongs to the technical field of batteries, and discloses a tab welding device which comprises a working platform, a bearing piece, a welding head, a driving piece, a welding die and a fixing mechanism. The bearing piece is arranged on the working platform. The welding head is arranged on the bearing piece in a sliding manner along a preset direction, and is positioned above the working platform. The driver is configured to drive the welding head to vertically slide. The welding mold is arranged on the working platform, is positioned right below the welding head and is configured to bear the battery cell. The fixing mechanism is fixedly arranged on the welding head, is positioned between the welding head and the battery cell and is configured to fix the lug on the battery cell in the welding process. According to the utility model, in the welding process, the tab is fixed by the fixing mechanism all the time, so that the condition that the tab is broken due to shaking in the welding process can be avoided. In addition, the driving piece drives the welding head and the fixing mechanism to lift simultaneously, so that the working procedure is simple, the cost is low, and the large-scale commercial production is facilitated.

Description

Tab welding device

Technical Field

The utility model relates to the technical field of batteries, in particular to a tab welding device.

Background

The winding core of the square-shell battery is usually formed by laminating or winding a plurality of positive plates and a plurality of negative plates, each positive plate and each negative plate are respectively provided with a tab, and in the process of winding the square-shell battery into the shell, a plurality of positive tabs and a plurality of negative tabs are required to be welded with a cover plate together, and an ultrasonic welding mode is generally used. The principle of ultrasonic welding is that high-frequency vibration waves (the frequency is more than 16 Hz) are transmitted to the surfaces of two objects to be welded, and under the condition of pressurization, the surfaces of the two objects are rubbed with each other to form fusion between molecular layers, so that the quality of the electrode lugs after welding can be improved.

The number of layers of the anode and the cathode is generally larger as the energy density is required, so that the number of the led-out tabs is larger, the tabs tend to be miniaturized due to the light weight and the actual production requirement, the conventional tabs are very thin and have the thickness of only about 0.01mm, and in addition, the tabs shake in the welding process due to the adoption of a pressurizing friction mode in ultrasonic welding, so that the tabs are very easy to break; and the pole piece in the battery cell is stressed more and more, so that the situation that the pole piece is broken in the production and subsequent use processes of the battery cell is easily caused.

Therefore, the above-described problems are to be solved.

Disclosure of Invention

The utility model aims to provide a tab welding device so as to reduce the occurrence of pole piece breakage in the production and subsequent use processes of an electric core.

To achieve the purpose, the utility model adopts the following technical scheme:

a tab welding device, comprising:

a working platform;

the bearing piece is arranged on the working platform;

the welding head is arranged on the bearing piece in a sliding manner along a preset direction and is positioned above the working platform;

a driver configured to drive the welding head to slide vertically;

a welding die disposed on the work platform, the welding die being located directly below the welding head, the welding die being configured to carry the electrical core; and

the fixing mechanism is fixedly arranged on the welding head, is positioned between the welding head and the battery cell and is configured to fix the lug on the battery cell in the welding process.

Preferably, the fixing mechanism includes:

the fixing piece is fixedly arranged on the welding head along the vertical direction; and

the buffer piece is arranged at the lower end of the fixing piece.

Preferably, the fixing member is a metal pressing plate.

Preferably, the buffer member is a high temperature resistant buffer member.

Preferably, a sliding groove is formed in the bearing piece along a preset direction, a mounting block is embedded in the sliding groove in a sliding manner, and the welding head is arranged on the mounting block;

the bearing piece is fixedly provided with a driving motor, an output shaft of the driving motor is arranged along the length direction of the sliding groove, a screw rod is coaxially and fixedly arranged on the output shaft of the driving motor, and a ball screw nut pair is formed between the screw rod and the mounting block.

Preferably, the welding mold includes a limiting member disposed on the working platform, and the limiting member is configured to limit the battery cell.

Preferably, the welding mold further comprises a tooth structure, the tooth structure is arranged on the limiting piece, and the tooth structure is used for being matched with the welding head to form welding seams which are arranged at intervals on the tab.

Preferably, the welding head is a circular welding head;

the circular welding head is provided with a tooth structure, and the tooth structure is used for being matched with the welding die to form welding seams which are arranged at intervals on the lug.

Preferably, the limiting piece is provided with a hole structure, and the hole structure and the tooth structure are matched to form welding seams which are arranged at intervals on the tab.

Preferably, the driving member is an air cylinder, the air cylinder is arranged on the bearing member, the telescopic end of the air cylinder is arranged along the vertical direction, and the welding head is arranged on the telescopic end.

The utility model has the beneficial effects that:

according to the welding head, the driving piece drives the welding head to descend and simultaneously drives the fixing mechanism to descend, and when the welding head is in contact with the electrode lugs, the fixing mechanism is used for fixing the electrode lugs, so that the electrode lugs are fixed by the fixing mechanism all the time in the welding process, and the situation that the electrode lugs are broken due to shaking in the welding process can be avoided. In addition, the driving piece drives the welding head and the fixing mechanism to lift simultaneously, so that the working procedure is simple, the cost is low, and the large-scale commercial production is facilitated.

Drawings

FIG. 1 is a schematic diagram of a tab welding device according to the present utility model;

an enlarged view at a in fig. 2.

In the figure:

100. a battery cell; 1. a working platform; 2. a carrier; 21. a chute; 3. welding head; 4. a driving member; 5. welding a die; 51. a limiting piece; 52. a tooth structure; 6. a fixing mechanism; 61. a fixing member; 62. and a buffer member.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1 and 2, the present embodiment provides a tab welding device for welding a plurality of tabs on a battery cell 100 into a whole or welding a tab on the battery cell 100 with an external tab, where the tab welding device includes a working platform 1, a carrier 2, a welding head 3, a driving member 4, a welding mold 5 and a fixing mechanism 6. Wherein, work platform 1 is the last mesa that the operation panel is rectangle setting. The carrier 2 is arranged on the working platform 1. The welding head 3 is slidingly arranged on the bearing piece 2 along a preset direction, and the welding head 3 is positioned above the working platform 1. In the present embodiment, the preset direction is the width direction of the work platform 1. The drive 4 is configured to drive the welding head 3 to slide vertically. A welding die 5 is disposed on the work platform 1 with the welding die 5 located directly below the welding head 3, the welding die 5 being configured to carry the electrical core 100. The fixing mechanism 6 is fixedly arranged on the welding head 3, the fixing mechanism 6 is positioned between the welding head 3 and the battery cell 100, and the fixing mechanism 6 is configured to fix the tab on the battery cell in the welding process.

In practical application, the electric core 100 is carried by the welding mold 3, then the welding head 3 and the fixing mechanism 6 are driven by the driving piece 4 to descend until the welding head 3 contacts with the electrode lugs, meanwhile, the fixing mechanism 6 finishes fixing the electrode lugs, then the welding head 3 starts to work to finish welding, and a plurality of electrode lugs are welded into a whole or the welding of the electrode lugs on the electric core 100 and the external electrode lugs is realized. It can be understood that when the driving piece 4 drives the welding head 3 to descend, the fixing mechanism 6 is driven to descend synchronously, and when the welding head 3 contacts with the tab, the fixing mechanism 6 completes the fixing of the tab, so that the tab is always fixed by the fixing mechanism 6 in the welding process, and the situation that the tab breaks due to shaking in the welding process can be avoided. In addition, the driving piece 4 drives the welding head 3 and the fixing mechanism 6 to lift simultaneously, so that the working procedure is simple, the cost is low, and the large-scale commercial production is facilitated.

It should be noted that, in this embodiment, the welding head 3 is a circular welding head, and of course, the tab welding device further includes an ultrasonic generator and a transducer adapted to the circular welding head, which are both in the prior art, and will not be described in detail.

Preferably, the driving member 4 is a cylinder, the cylinder is disposed on the carrier member 2, a telescopic end of the cylinder is disposed along a vertical direction, and the welding head 3 is disposed on the telescopic end. Specifically, the telescopic end of the cylinder extends downwards, that is, the telescopic end extends to drive the welding head 3 to descend, and conversely, the welding head 3 ascends. It can be appreciated that the driving member 4 is utilized to drive the circular welding head to slide up and down, so that the labor intensity of operators is reduced. It should be noted that, in other embodiments, the driving member 4 may be an electric cylinder or other common power source.

Further, a sliding groove 21 is formed in the bearing piece 2 along a preset direction, a mounting block is embedded in the sliding groove 21 in a sliding mode, and the welding head 3 is arranged on the mounting block. The bearing part 2 is fixedly provided with a driving motor, an output shaft of the driving motor is arranged along the length direction of the sliding groove 21, a screw rod is coaxially and fixedly arranged on the output shaft of the driving motor, and a ball screw nut pair is formed between the screw rod and the mounting block. It should be noted that in the present embodiment, the driving member 4 described above is fixedly provided on the mounting block, that is, the welding head 3 is provided on the mounting block.

It can be understood that, because the screw rod mounting blocks are in threaded connection, the driving motor drives the screw rod to rotate, namely, the driving motor can drive the mounting blocks to slide along the sliding groove 21, and the sliding direction of the mounting blocks can be changed by changing the steering direction of the driving motor. Therefore, the welding head 3 is driven by the driving motor to be matched with the welding die 5 to weld the plurality of lugs into a whole, and the automation degree of the roll welding device is improved.

The welding mold 5 includes a stopper 51 provided on the work platform 1, and the stopper 51 is configured to limit the battery cell 100. In this embodiment, the limiting member 51 is a vacuum chuck, which is of the prior art and will not be described in detail. Of course, in other embodiments, the limiting member 51 may also be a groove formed on the working platform 1, and is adapted to be clamped with the battery cell 100 through the groove, so as to limit the battery cell 100. It can be understood that the limiting piece 51 limits the battery cell 100, so that the battery cell 100 can be ensured not to shake during welding.

The welding mould 5 further comprises a tooth structure 52, the tooth structure 52 is arranged on the limiting piece 51, and the tooth structure 52 is used for being matched with the welding head 3 to form welding seams which are arranged at intervals on the lug, so that when the welding head 3 rolls and welds the lug along the tooth structure 52, the welding seams which are arranged at intervals are formed on the lug, so that the requirements of the lug production process are met, and the welding seams on the lug are arranged at intervals.

Of course, in other embodiments, the tooth structure 52 may also be provided on the circular welding head, in particular, the tooth structure 52 is provided on the circular welding head along the circumferential direction of the circular welding head, and the tooth structure 52 is used to form a weld joint on the tab at intervals in cooperation with the welding mold 3. Further, a hole structure may be further disposed on the limiting member 51, and the hole structure and the tooth structure 52 cooperate to form a weld seam disposed at intervals on the tab. In practical application, when the circular welding head rolls and welds the lug, the tooth structure 52 on the circular welding head is matched with the hole structure on the limiting piece 51, so that the lug is welded more firmly. It should be noted that, in practical application, the specific arrangement of the tooth structure 52 depends on the usage scenario of the tab welding device.

The fixing mechanism 6 includes a fixing member 61 and a buffer member 62, and the fixing member 61 is fixedly disposed on the welding head 3 in the vertical direction. The buffer 62 is provided at the lower end of the fixing member 61. It will be appreciated that the provision of the buffer 62 can avoid hard contact between the fixing member 61 and the tab, thereby protecting the tab. Specifically, the fixing member 61 is a metal platen. The buffer 62 is a high temperature resistant buffer 62. Since the fixing mechanism 6 is provided near the horn 3, the damper 62 is required to have a high temperature resistant effect, and may be, for example, silica gel, rubber, or the like. In addition, the metal pressing plate is generally made of alloy, can bear certain mechanical strength, and cannot deform in the stress process.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides a utmost point ear welding set which characterized in that includes:

a working platform (1);

the bearing piece (2) is arranged on the working platform (1);

the welding head (3) is arranged on the bearing piece (2) in a sliding manner along a preset direction, and the welding head (3) is positioned above the working platform (1);

a drive (4) configured to drive the vertical sliding of the welding head (3);

a welding mould (5) arranged on the working platform (1), wherein the welding mould (5) is positioned right below the welding head (3), and the welding mould (5) is configured to bear an electric core (100); and

the fixing mechanism (6) is fixedly arranged on the welding head (3), the fixing mechanism (6) is positioned between the welding head (3) and the battery cell (100), and the fixing mechanism (6) is configured to fix the lug on the battery cell (100) in the welding process.

2. Tab welding device according to claim 1, characterized in that the fixing means (6) comprise:

the fixing piece (61) is fixedly arranged on the welding head (3) along the vertical direction; and

and a buffer member (62) provided at the lower end of the fixing member (61).

3. Tab welding device according to claim 2, characterized in that the fixing element (61) is a metal pressure plate.

4. The tab welding device according to claim 2, wherein the buffer (62) is a high temperature resistant buffer (62).

5. The tab welding device according to claim 1, wherein a chute (21) is formed in the bearing member (2) along a preset direction, a mounting block is slidably inserted in the chute (21), and the welding head (3) is arranged on the mounting block;

the bearing piece (2) is fixedly provided with a driving motor, an output shaft of the driving motor is arranged along the length direction of the sliding groove (21), a screw rod is coaxially and fixedly arranged on the output shaft of the driving motor, and a ball screw nut pair is formed between the screw rod and the mounting block.

6. Tab welding device according to claim 1, characterized in that the welding mould (5) comprises a stop (51) provided on the work platform (1), the stop (51) being configured to stop the cell (100).

7. The tab welding device according to claim 6, wherein the welding die (5) further comprises a tooth structure (52), the tooth structure (52) is arranged on the limiting piece (51), and the tooth structure (52) is used for being matched with the welding head (3) to form welding seams arranged at intervals on the tab.

8. The tab welding device according to claim 6, wherein the welding head (3) is a circular welding head;

the circular welding head is provided with a tooth structure (52), and the tooth structure (52) is used for being matched with the welding mould (5) to form welding seams which are arranged at intervals on the electrode lugs.

9. The tab welding device according to claim 8, wherein the limiting member (51) is provided with a hole structure, and the hole structure and the tooth structure (52) cooperate to form welding seams arranged at intervals on the tab.

10. The tab welding device according to claim 1, wherein the driving member (4) is a cylinder, the cylinder is disposed on the carrier member (2), a telescopic end of the cylinder is disposed in a vertical direction, and the welding head (3) is disposed on the telescopic end.