CN220782565U

CN220782565U - Ultrasonic welding device

Info

Publication number: CN220782565U
Application number: CN202321745759.3U
Authority: CN
Inventors: 黄军; 刘娟; 杨庆亨
Original assignee: Zhongxing Pylon Battery Co Ltd
Current assignee: Zhongxing Pylon Battery Co Ltd
Priority date: 2023-07-05
Filing date: 2023-07-05
Publication date: 2024-04-16
Anticipated expiration: 2033-07-05

Abstract

The utility model discloses an ultrasonic welding device, which relates to the technical field of battery welding and comprises an ultrasonic welding machine and a battery cell arranged on one side of the ultrasonic welding machine, wherein a TAB sheet is arranged on the right side of the ultrasonic welding machine through a bracket, the welding head comprises an upper welding head and an anvil, the upper welding head is arranged at the welding end of the ultrasonic welding machine, the anvil is arranged in the bracket below the ultrasonic welding machine, the battery cell and the TAB sheet are clamped through the upper welding head and the anvil, and then the ultrasonic welding machine is opened for ultrasonic welding. According to the ultrasonic welding device, the anvil is provided with the blocking groove, so that the welding position and the battery cell main body can be completely isolated, the current collector is prevented from being torn due to adhesion, the anvil welding teeth are designed to be high and low teeth, the current collector can be prevented from being lowered in welding strength due to over welding, the battery cell scrapping caused by adhesion of the current collector and the anvil can be avoided through the newly designed anvil, and the product quality is improved.

Description

Ultrasonic welding device

Technical Field

The utility model relates to the technical field of battery welding, in particular to an ultrasonic welding device.

Background

Ultrasonic welding is to transfer high-frequency vibration waves 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. The ultrasonic welding technology is widely applied to welding of the TAB of the lithium battery and the current collector, and the working principle of the ultrasonic welding technology is that electric energy is converted into mechanical energy to generate high-frequency vibration so that two mediums are mutually rubbed to generate high-temperature fusion.

However, in the above technical solution, in the process of welding and fixing the battery assembly, at least the following technical problems are found:

1. the traditional welding method is easy to generate sparks, the temperature is not easy to control in the welding process, and the battery is easy to be damaged;

2. because the foil for producing the lithium battery is very thin and the aluminum material is easy to adhere, when the welding is finished, the bottommost foil is adhered to the anvil, and the battery cell is torn when being transferred to the next working procedure from the working position, so that the internal resistance of the battery cell is increased and scrapped.

For this purpose, we propose an ultrasonic welding device to solve the above-mentioned problems.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides an ultrasonic welding device, which solves the technical problem that a battery is stuck with an anvil by adding a blocking groove and a design of high and low teeth to the anvil.

(II) technical scheme

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

an ultrasonic welding device, an ultrasonic welding machine and a battery cell arranged at one side of the ultrasonic welding machine, wherein a TAB sheet is arranged at the right side of the ultrasonic welding machine through a bracket,

the welding head comprises an upper welding head and an anvil block, wherein the upper welding head is arranged at the welding end of the ultrasonic welding machine, the anvil block is arranged in a bracket below the ultrasonic welding machine, the electric core and the TAB sheet are clamped by the upper welding head and the anvil block, and then the ultrasonic welding machine is opened for ultrasonic welding.

Preferably, the middle part of the anvil is provided with a base and a head, the middle part of the upper end of the head is provided with welding teeth which are designed to be high and low, and the welding teeth close to the main body of the battery cell are lower than those of the welding position, so that the current collector can be protected from lower welding strength caused by overselding.

Preferably, the middle part of the upper end of the head is provided with a blocking groove, so that a welding position and the battery cell main body can be completely isolated, and the current collector is prevented from being torn due to adhesion.

Preferably, the welding teeth are designed as high and low teeth, and the welding teeth close to the main body of the battery core are shallower than the welding teeth of the welding position by 0.1-0.2mm.

Preferably, the shape of the welding teeth is a cylinder or a diamond-shaped cylinder.

Preferably, the size of the diamond-shaped columns is 0.6x0.6mm, and the tooth height is 0.2mm higher than the welding thickness according to the welding thickness.

Preferably, the middle part of the base is provided with a mounting hole, the mounting hole is arranged above the air cylinder through a bolt, and the upper end of the base is provided with a stand column for connecting the base and the head through the stand column.

Preferably, a platform is arranged above the right side of the ultrasonic welder, a side baffle is fixedly arranged at the upper end of the platform, the welding position of the battery cell is limited through the baffle, when the battery cells with different sizes are required to be welded and the welding position of the battery cell is required to be adjusted, the position of the side baffle is changed to adjust the position of the battery cell, and the ultrasonic welder is simple in structure and convenient to adjust.

Preferably, an air cylinder is arranged below the ultrasonic welder, an anvil is arranged at the upper end of the air cylinder, the anvil is lifted through the air cylinder, a lifting mechanism is arranged inside the ultrasonic welder, the lifting mechanism drives the upper welding head to lift, and therefore the purpose of clamping the battery cell and the TAB sheet during welding and loosening the position of the battery cell and the TAB sheet after welding is achieved, automatic operation is adopted in the actions, and efficiency is higher than that of manual pressing equipment.

(III) beneficial effects

1. Because the upper welding head and the anvil block are used for clamping the battery cell and the TAB sheet, and then the ultrasonic welding machine is opened for ultrasonic welding, the problems that sparks are easy to generate, the temperature is not easy to control in the welding process are effectively solved, the cleaning is realized, the pollution is avoided, the workpiece is not damaged, and the welding process is stable;

2. the anvil is designed with the blocking groove, so that the welding position and the battery cell main body can be completely isolated, the current collector is prevented from being torn due to adhesion, the anvil welding teeth are designed to be high and low teeth, and therefore the current collector can be protected from being lowered in welding strength due to overselding, the problems that the foil material for producing the lithium battery is very thin and the aluminum material is easy to adhere in the welding process are effectively solved, and further the battery cell damage caused by adhesion of the anvil to the current collector is avoided; can guarantee when the welding that the electric current collector can not pass the welding and lead to welding strength to become low, can avoid electric core that electric current collector and anvil adhesion lead to scrap through the anvil of new design, promote product quality.

Drawings

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

FIG. 1 is an overall construction diagram of an ultrasonic welding apparatus according to the present utility model;

FIG. 2 is a front view of an ultrasonic welding apparatus according to the present utility model;

FIG. 3 is a three-dimensional block diagram of an anvil in an ultrasonic welding apparatus according to the present utility model;

fig. 4 is a front view of an anvil in an ultrasonic welding apparatus according to the present utility model.

Legend description: 1. an ultrasonic welder; 2. a battery cell; 3. an upper welding head; 4. an anvil block; 41. a base; 42. a column; 43. a head; 44. welding teeth; 45. a blocking groove; 5. a platform; 6. a TAB sheet; 7. and (3) a cylinder.

Detailed Description

According to the ultrasonic welding device, the problem that the current collector outside the battery cell is stuck to the anvil in the welding process in the prior art is solved, the design of the blocking groove and the high-low teeth is added to the anvil, the welding effect of the current collector of the battery cell is guaranteed, the welding strength is guaranteed in the welding process, the current collector is prevented from being torn, the product is scrapped, and the qualification rate of the product is improved.

Example 1

The technical scheme in this application embodiment is for solving the easy technical problem that pierces through in the battery welding process, and the general thinking is as follows:

in view of the problems existing in the prior art, the present utility model provides an ultrasonic welding apparatus, comprising: an ultrasonic welder 1 and a battery cell 2 arranged at one side of the ultrasonic welder 1, wherein a TAB sheet 6 is arranged at the right side of the ultrasonic welder 1 through a bracket,

the welding head comprises an upper welding head 3 and an anvil 4, wherein the upper welding head 3 is arranged at the welding end of the ultrasonic welding machine 1, the anvil 4 is arranged in a bracket below the ultrasonic welding machine 1, the upper welding head 3 and the anvil 4 clamp the battery cell 2 and the TAB sheet 6, and then the ultrasonic welding machine 1 is opened for ultrasonic welding.

A platform 5 is arranged above the right side of the ultrasonic welder 1, a side stop bar is fixedly arranged at the upper end of the platform 5, the welding position of the battery core 2 is limited by the stop bar, when the battery cores 2 with different sizes are required to be welded and the welding position of the battery core 2 is required to be adjusted, the position of the battery core 2 is adjusted by changing the position of the side stop bar, the structure is simple, the adjustment is convenient,

the ultrasonic welder is characterized in that an air cylinder 7 is arranged below the ultrasonic welder 1, an anvil block 4 is arranged at the upper end of the air cylinder 7, the anvil block 4 is lifted through the air cylinder 7, a lifting mechanism is arranged inside the ultrasonic welder 1, the upper welding head 3 is driven to lift through the lifting mechanism, clamping of the battery cell 2 and the TAB sheet 6 during welding and loosening and abdication after welding are achieved, and the automatic operation is adopted in the actions, so that the efficiency is higher than that of manual pressing equipment.

When the ultrasonic welding machine is used, the battery cell 2 is placed on the platform 5, the TAB sheet 6 is placed on the battery cell 2, the ultrasonic welding machine 1 welds the battery cell 2 and the TAB sheet 6 together, the common anvil 4 easily adheres the current collector to the anvil 4 during welding, and the battery cell 2 can be scrapped due to the increase of the internal resistance of the battery cell 2 caused by the damage of the current collector in the subsequent process.

Example 2

Based on embodiment 1, this application embodiment is because of the foil of production lithium cell is very thin and the aluminum product material glues easily in the welding process, will appear when welding after ending and glue together with the anvil in one deck foil (current collector) of bottommost, will tear when the electric core shifts to next process from this station and lead to electric core internal resistance increase and scrap, and the general thinking is as follows:

as shown in fig. 3-4, the middle part of the anvil 4 is provided with a base 41 and a head 43, the middle part of the upper end of the head 43 is provided with a welding tooth 44, the welding tooth 44 is designed as a high-low tooth, the welding tooth near the main body of the cell is lower than the welding tooth at the welding position, thus the current collector can be protected from lower welding strength caused by over-welding,

the welding teeth 44 are designed to be high and low teeth, the welding teeth close to the main body of the battery cell are shallower than the welding teeth of the welding position by 0.1-0.2mm, adjustment of parts with different welding heights can be better achieved, the flexibility is higher, and the welding teeth 44 are in the shape of cylinders or diamond columns.

The middle part of the upper end of the head 43 is provided with a blocking groove 45, so that a welding position and the main body of the battery cell 2 can be completely isolated, and the current collector is prevented from being torn due to adhesion.

The middle part of the base 41 is provided with a mounting hole, the mounting hole is arranged above the air cylinder 7 through a bolt, and the upper end of the base 41 is provided with a stand column 42 which connects the base 41 with a head 43 through the stand column 42.

The head 43 is redesigned, a blocking groove 45 is formed in the middle of the upper end of the head 43, and a welding position and a main body of the battery cell 2 can be isolated during welding, so that the battery cell 2 is prevented from being damaged due to the fact that the anvil 4 is adhered with the current collector; the welding teeth 44 are high and low teeth, so that the current collector can be prevented from being overselded to lower the welding strength in welding, the battery cell scrapping caused by the adhesion of the current collector and the anvil 4 can be avoided through the newly designed anvil 4, the current collector and the anvil 4 can be irregularly produced in the production process, the production speed is high, the current collector can easily flow into the next process, and great potential safety hazards exist in the abnormal battery cell.

Example 3

Based on embodiment 2, the welding teeth 44 are diamond columns, the sizes of the diamond columns are 0.6mm by 0.6mm, the tooth heights are 0.2mm higher than the welding thickness according to the welding thickness, the stability of the diamond columns is high, and the corresponding matching upper welding heads 3 realize uniform clamping on the battery cells 2 and the TAB sheet 6.

It is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. The utility model provides an ultrasonic welding device, includes ultrasonic welding machine (1) and places electric core (2) in ultrasonic welding machine (1) one side, placed TAB piece (6), its characterized in that in ultrasonic welding machine (1):

the welding head is arranged in the ultrasonic welding machine (1), comprises an upper welding head (3) and an anvil (4), clamps the battery cell (2) and the TAB sheet (6) through the upper welding head (3) and the anvil (4), and then opens the ultrasonic welding machine (1) for ultrasonic welding.

2. An ultrasonic welding apparatus as defined in claim 1, wherein: the upper welding head (3) is arranged at the welding end of the ultrasonic welding machine (1), a lifting mechanism is arranged in the ultrasonic welding machine (1), the upper welding head (3) is driven to lift by the lifting mechanism, and the anvil block (4) is arranged in a bracket below the ultrasonic welding machine (1).

3. An ultrasonic welding apparatus as defined in claim 2, wherein: the middle part of the anvil block (4) is provided with a base (41) and a head (43), the middle part of the upper end of the head (43) is provided with welding teeth (44), the welding teeth (44) are designed to be high and low teeth, and the welding teeth close to the main body of the battery cell (2) are lower than the welding teeth of the welding position.

4. An ultrasonic welding apparatus according to claim 3, wherein: the middle part of the upper end of the head part (43) is provided with a blocking groove (45) which can completely isolate the welding position from the main body of the battery cell (2).

5. An ultrasonic welding apparatus according to claim 3, wherein: the welding teeth (44) are designed to be high and low, and the welding teeth close to the main body of the battery core are shallower than the welding teeth of the welding position by 0.1-0.2mm.

6. An ultrasonic welding apparatus according to claim 5, wherein: the shape of the welding teeth (44) is a cylinder or a diamond-shaped cylinder.

7. An ultrasonic welding apparatus as defined in claim 6, wherein: the size of the diamond-shaped column is 0.6mm, the tooth height is determined according to the welding thickness, and the tooth height is 0.2mm higher than the welding thickness.

8. An ultrasonic welding apparatus according to claim 3, wherein: the middle part of base (41) is provided with the mounting hole, installs in cylinder (7) top through the bolt, base (41) upper end is provided with stand (42) and connects base (41) and head (43) through stand (42).

9. An ultrasonic welding apparatus as defined in claim 1, wherein: a platform (5) is arranged above the right side of the ultrasonic welder (1), a side stop bar is fixedly arranged at the upper end of the platform (5), and the welding position of the battery cell (2) is limited through the stop bar.

10. An ultrasonic welding apparatus as defined in claim 1, wherein: an air cylinder (7) is arranged below the ultrasonic welder (1), an anvil block (4) is arranged at the upper end of the air cylinder (7), and the anvil block (4) is lifted through the air cylinder (7).