CN216938955U

CN216938955U - Electricity core welding mechanism

Info

Publication number: CN216938955U
Application number: CN202220293435.XU
Authority: CN
Inventors: 朱杰; 曾浩; 曾玉祥; 厉成北
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-12
Anticipated expiration: 2032-02-14

Abstract

A cell soldering mechanism, comprising: a laser welding assembly comprising a laser emitting head; cell centre gripping subassembly, cell centre gripping subassembly is including relative last pivot that sets up and lower pivot, drive go up the pivot around self axis pivoted go up pivot rotation driving unit and drive down the pivot around self axis pivoted lower pivot rotation driving unit, go up the pivot with the coaxial setting of lower pivot to can push up the top and the bottom at electric core respectively, go up the pivot with the axis relative movement of electric core can be followed to the lower pivot. The battery core welding mechanism adopts the upper rotating shaft and the lower rotating shaft which are oppositely arranged to clamp the top and the bottom of the battery core, and the upper rotating shaft and the lower rotating shaft can relatively move along the axial direction, so that the model change is convenient and rapid, the battery core can be driven to rotate around the axis of the battery core in the welding process through the rotation of the upper rotating shaft and the lower rotating shaft, and the problem of poor welding caused by the fact that the traditional welding mechanism cannot rotate and weld along with the rotation in the welding process is solved.

Description

Electricity core welding mechanism

Technical Field

The utility model belongs to the technical field of lithium battery manufacturing, and particularly relates to a welding mechanism of a cylindrical battery core.

Background

The shell of the cylindrical battery cell consists of a shell body and a shell cover, and the shell body and the shell cover are welded together by welding equipment. The size diverse of the battery of different models, current electric core welding mechanism need change anchor clamps when welding different model batteries, and the debugging time is long after the remodeling, and is inefficient, influences the productivity. And current electric core welding mechanism can not carry out fine location to electric core, takes place cap and casing dislocation easily and leads to bad welds such as rosin joint.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cell welding mechanism which is convenient and quick in shape change and good in welding quality.

In order to achieve the purpose, the utility model adopts the following technical solutions:

a cell soldering mechanism, comprising: a laser welding assembly comprising a laser emitting head; cell centre gripping subassembly, cell centre gripping subassembly is including relative last pivot that sets up and lower pivot, drive go up the pivot around self axis pivoted go up pivot rotation driving unit and drive down the pivot around self axis pivoted lower pivot rotation driving unit, go up the pivot with the coaxial setting of lower pivot to can push up the top and the bottom at electric core respectively, go up the pivot with the axis relative movement of electric core can be followed to the lower pivot.

Furthermore, the battery cell clamping assembly further comprises a clamping jaw, and the clamping jaw is located below the upper rotating shaft and used for clamping the battery cell in the circumferential direction of the battery cell.

Furthermore, the contact part of the clamping jaw and the battery core is a miniature bearing or a smooth cylinder.

Further, the micro-bearings or the smooth cylinders are distributed in a three-point mode.

Furthermore, the battery cell clamping assembly further comprises an upper mounting seat, an upper sliding seat, a horizontal mounting plate, a lower sliding seat and a vertical mounting plate, wherein the upper sliding seat is movably arranged on the horizontal mounting plate along the horizontal direction, the upper mounting seat is arranged on the upper sliding seat, and the upper rotating shaft rotation driving unit are arranged on the upper mounting seat; the lower sliding seat can be movably arranged on the vertical mounting plate along the vertical direction, and the lower rotating shaft driving unit are arranged on the lower sliding seat.

Furthermore, the laser welding assembly comprises a fixed mounting seat and a sliding seat movably arranged on the fixed mounting seat, and the laser emitting head is arranged on the sliding seat.

Further, the slide seat can be movably arranged on the fixed mounting seat along the horizontal direction and the vertical direction.

Furthermore, the dust collection device also comprises a dust collection assembly, wherein the dust collection assembly comprises a dust collection pipe, one end of the dust collection pipe is connected with the negative pressure source, and the other end of the dust collection pipe extends to the position near the upper rotating shaft.

Furthermore, the dust removal assembly further comprises a supporting rod for fixing the dust suction pipe.

Further, the upper rotating shaft and the lower rotating shaft are metal shafts or nonmetal shafts.

According to the technical scheme, the top and the bottom of the battery cell are clamped by the upper rotating shaft and the lower rotating shaft which are oppositely arranged, the upper rotating shaft and the lower rotating shaft can move relatively along the axial direction, the model change is convenient and rapid, the battery cell can be driven to rotate around the axis of the battery cell in the welding process through the rotation of the upper rotating shaft and the lower rotating shaft, and the problem of poor welding caused by the fact that the conventional welding mechanism cannot rotate and weld along with the rotation in the welding process is solved. In preferred scheme, come to carry out the concentricity adjustment to casing and casing through setting up the clamping jaw, can avoid casing and casing dislocation and lead to rosin joint, improve welding quality. The utility model has the advantages of convenient and rapid die change, convenient debugging and high sealing welding yield, can solve the problems of long die change time and complex and fussy operation of the existing welding mechanism, reduces the cost to the maximum extent and improves the production efficiency.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a cell welding mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a laser welded assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a cell clamping assembly according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a dust removal assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a clamping jaw according to an embodiment of the utility model.

Detailed Description

The utility model will be described in detail below with reference to the accompanying drawings, wherein for the purpose of illustrating embodiments of the utility model, the drawings showing the structure of the device are not to scale but are partly enlarged, and the schematic drawings are only examples, and should not be construed as limiting the scope of the utility model. It should be noted that the drawings are in simplified form and are not to precise scale, which is provided for the purpose of facilitating and clearly facilitating the description of the embodiments of the present invention. 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 to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; the terms "front," "back," "bottom," "upper," "lower," and the like refer to an orientation or positional relationship relative to an orientation or positional relationship shown in the drawings, which is for convenience and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

As shown in fig. 1, the cell welding mechanism of the present embodiment includes a laser welding assembly 1, a cell clamping assembly 2, and a dust removing assembly 3. As a preferred implementation mode, the dust removing assembly 3 is provided in the present embodiment, so that metal chips or dust generated in the welding process can be collected while welding, and the influence of dust chips on welding is avoided, thereby improving the welding quality. Laser welding subassembly 1 is used for welding the casing and the cap of electricity core, and electricity core centre gripping subassembly 2 is used for centre gripping electricity core to at the rotatory electric core of welding process, make laser welding subassembly 1 accomplish the welding of casing and cap around self axis pivoted in-process along the circumference at electric core.

As shown in fig. 2, the laser welding assembly 1 of the present embodiment includes a fixed mounting base 1-1, a laser emitting head 1-2, and a sliding base 1-3, the sliding base 1-3 is movably disposed on the fixed mounting base 1-1, the laser emitting head 1-2 is disposed on the sliding base 1-3, and the sliding base 1-3 is movable in a vertical direction and a horizontal direction, so that the laser emitting head 1-2 can move in the horizontal direction and the vertical direction with the sliding base 1-3 to adjust a laser emitting position. In the present embodiment, a first movement driving unit 1-4 and a second movement driving unit (not shown) are further provided on the fixed mount 1-1, the first movement driving unit 1-4 is used for controlling the movement of the laser emitting head 1-2 (the slide 1-3) in the vertical direction, and the second movement driving unit is used for controlling the movement of the laser emitting head 1-2 (the slide 1-3) in the horizontal direction. The first moving driving unit of the embodiment adopts a servo motor, and the servo motor is connected with the sliding seats 1-3 through a screw rod transmission structure, so that the sliding seats 1-3 are controlled to move up and down, and the heights of the laser emitting heads 1-2 are adjusted. The second movement driving unit may employ a servo motor or an air cylinder, etc.

Referring to fig. 3, the cell clamping assembly 2 of the present embodiment includes an upper rotating shaft 2-1, a clamping jaw 2-2, an upper mounting seat 2-3, an upper rotating shaft rotation driving unit 2-4, an upper sliding seat 2-5, a lower rotating shaft 2-6, a lower rotating shaft rotation driving unit 2-7, and a lower sliding seat 2-8. The upper rotating shaft 2-1 and the lower rotating shaft 2-6 are coaxially arranged and are opposite to each other up and down, the battery cell is positioned between the upper rotating shaft 2-1 and the lower rotating shaft 2-6, the upper rotating shaft 2-1 is propped against the top of the battery cell, and the lower rotating shaft 2-6 is propped against the bottom of the battery cell, so that the upper rotating shaft and the lower rotating shaft are matched to clamp the battery cell. The upper rotating shaft 2-1 and the lower rotating shaft 2-6 can rotate around the axis of the battery cell under the control of the upper rotating shaft rotation driving unit 2-4 and the lower rotating shaft rotation driving unit 2-7 respectively, so that the battery cell is driven to rotate around the axis of the battery cell. In the embodiment, the upper rotating shaft 2-1, the clamping jaw 2-2 and the upper rotating shaft rotation driving unit 2-4 are all arranged on the upper mounting seat 2-3, and the clamping jaw 2-2 is positioned below the upper rotating shaft 2-1 and can clamp the battery cell from the circumferential direction of the battery cell. The upper rotating shaft driving unit 2-4 of the embodiment adopts a servo motor, and an output shaft of the servo motor is connected with the upper rotating shaft 2-1 through a coupler 2-9, so that the upper rotating shaft 2-1 is driven to rotate. The upper mounting seat 2-3 is arranged on the upper sliding seat 2-5, the upper sliding seat 2-5 can move along the horizontal direction, the upper sliding seat 2-5 of the embodiment is arranged on a horizontal mounting plate 2-10, the upper sliding seat 2-5 and the horizontal mounting plate 2-10 are connected in a sliding manner through a guide rail and sliding chute structure, and the upper sliding seat 2-5 can move along the horizontal direction under the control of a translation driving unit (not shown). The clamping jaw 2-2 is used for realizing concentricity calibration of a shell and a shell cover of the battery cell, and the clamping jaw 2-2 is controlled by the cylinder 2-11 and can clamp or unclamp the battery cell. As shown in fig. 5, preferably, in order not to affect the rotation of the cell, the contact part of the clamping jaw 2-2 and the cell is a micro bearing 2-12 or a smooth cylinder 2-12. The micro-bearings 2-12 or the smooth cylinders 2-12 are distributed in three points.

The lower rotating shaft 2-6 and the lower rotating shaft rotation driving unit 2-7 are arranged on the lower sliding seat 2-8, the lower sliding seat 2-8 of the embodiment can be arranged on a vertical mounting plate 2-12 in a moving mode along the vertical direction, the movement of the lower sliding seat 2-8 is controlled by a vertical movement driving unit 2-13, the vertical movement driving unit 2-13 of the embodiment also adopts a servo motor, and the servo motor is connected with the lower sliding seat 2-8 through a lead screw transmission assembly so as to control the up-and-down movement of the lower sliding seat 2-8. The lower sliding seat 2-8 drives the lower rotating shaft 2-6 to move when moving, and the lower rotating shaft 2-6 can be propped against the bottom of the battery cell after rising. The upper rotating shaft 2-1 and the lower rotating shaft 2-6 can be made of metal materials or nonmetal materials.

As shown in FIG. 4, the dust removing assembly 3 of this embodiment includes a suction pipe 3-1 and a support rod 3-2, one end of the suction pipe 3-1 is connected to a negative pressure source, and the other end (dust suction end) extends to the vicinity of the upper rotary shaft 2-1. The supporting rod 3-2 is used for supporting the dust suction pipe 3-1, the supporting rod 3-2 of the embodiment is fixed on the vertical mounting plate 2-12, and the supporting rod 3-2 extends along the vertical direction to fix the dust suction end of the dust suction pipe 3-1 near the upper rotating shaft 2-1.

The following describes a welding operation procedure of the cell welding mechanism according to the present invention with reference to fig. 1.

After the battery cell moves from the previous station to the welding station, the lower rotating shaft 2-6 rises and is matched with the upper rotating shaft 2-1 to respectively support against the bottom and the top of the battery cell, the battery cell is vertically pressed by the upper rotating shaft 2-1 and the lower rotating shaft 2-6, the pressed rear clamping jaw 2-2 is clamped at the joint of the shell and the shell cover of the battery cell, and concentricity calibration is carried out on the shell and the shell cover;

then the upper rotating shaft rotation driving unit 2-4 and the lower rotating shaft rotation driving unit 2-7 respectively drive the upper rotating shaft 2-1 and the lower rotating shaft 2-6 to enable the upper rotating shaft 2-1 and the lower rotating shaft 2-6 to synchronously rotate and drive the battery cell to rotate together;

when the battery core rotates, the laser emitting heads 1-2 move to the welding position to emit laser to weld the shell and the shell cover, and the concentricity of the shell and the shell cover can be kept all the time in the welding process under the action of the clamping jaws 2-2, so that the yield of the circumferential sealing welding of the battery core is improved. And the dust suction pipe 3-1 is opened to perform negative pressure dust suction during welding.

The welding mechanism adopts the upper rotating shaft and the lower rotating shaft which are oppositely arranged to fix the battery cell, the distance between the upper rotating shaft and the lower rotating shaft can be adjusted according to the requirement, and the clamping jaw adopts a mode of positioning the circle center at 3 points, so that the welding mechanism can be compatible with the cylindrical battery cells with different diameters, the clamp does not need to be replaced, the link of clamp debugging is omitted, the model changing time is shortened, the model changing efficiency is improved, and the welding yield can reach 99.5%.

Of course, the technical concept of the present invention is not limited to the above embodiments, and many different specific schemes can be obtained according to the concept of the present invention, for example, the driving unit for controlling the movement of the component can adopt a common driving component such as a motor, a cylinder, an electric push rod, etc., when the driving unit adopts a motor, besides a screw transmission structure, other conventional transmission structures such as a chain can also be adopted for transmission; the sliding component and the mounting plate can be in sliding connection by adopting a guide rail and sliding chute structure, and the arrangement positions of the guide rail and the sliding chute can be correspondingly changed according to requirements; such modifications and equivalents are intended to be included within the scope of the present invention.

Claims

1. A cell welding mechanism, comprising:

a laser welding assembly comprising a laser emitting head;

cell centre gripping subassembly, cell centre gripping subassembly is including relative last pivot and lower pivot, the drive that sets up go up the pivot around self axis pivoted last pivot rotation driving unit and drive down the pivot is around self axis pivoted lower pivot rotation driving unit, go up the pivot with the coaxial setting of lower pivot to can push up the top and the bottom at electric core respectively, go up the pivot with the axis relative movement of electric core can be followed in the pivot down.

2. The cell welding mechanism of claim 1, wherein: the battery cell clamping assembly further comprises a clamping jaw, and the clamping jaw is located below the upper rotating shaft and used for clamping the battery cell in the circumferential direction of the battery cell.

3. The cell welding mechanism of claim 2, wherein: the contact part of the clamping jaw and the battery core is a miniature bearing or a smooth cylinder.

4. The cell welding mechanism of claim 3, wherein: the micro-bearings or smooth cylinders are distributed in a three-point mode.

5. The cell welding mechanism of claim 1, wherein: the battery cell clamping assembly further comprises an upper mounting seat, an upper sliding seat, a horizontal mounting plate, a lower sliding seat and a vertical mounting plate, wherein the upper sliding seat is movably arranged on the horizontal mounting plate along the horizontal direction, the upper mounting seat is arranged on the upper sliding seat, and the upper rotating shaft rotation driving unit are arranged on the upper mounting seat; the lower sliding seat can be movably arranged on the vertical mounting plate along the vertical direction, and the lower rotating shaft driving unit are arranged on the lower sliding seat.

6. The cell welding mechanism of claim 1, wherein: the laser welding assembly comprises a fixed mounting seat and a sliding seat movably arranged on the fixed mounting seat, and the laser emitting head is arranged on the sliding seat.

7. The cell welding mechanism of claim 6, wherein: the sliding seat can be movably arranged on the fixed mounting seat along the horizontal direction and the vertical direction.

8. The cell welding mechanism of claim 1, wherein: the dust collection device is characterized by further comprising a dust collection assembly, wherein the dust collection assembly comprises a dust collection pipe, one end of the dust collection pipe is connected with the negative pressure source, and the other end of the dust collection pipe extends to the position near the upper rotating shaft.

9. The cell welding mechanism of claim 8, wherein: the dust removal assembly further comprises a supporting rod used for fixing the dust suction pipe.

10. The cell welding mechanism of claim 1, wherein: the upper rotating shaft and the lower rotating shaft are metal shafts or nonmetal shafts.