CN221019140U

CN221019140U - Welding device for battery cell current collecting disc

Info

Publication number: CN221019140U
Application number: CN202322371271.5U
Authority: CN
Inventors: 方冲
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-05-28
Anticipated expiration: 2033-08-31

Abstract

The utility model provides a welding device for a battery cell current collecting disc, and belongs to the technical field of new energy battery processing equipment. The welding device comprises a press-fitting clamp and a laser welding device, wherein the press-fitting clamp comprises a chassis, a clamping cylinder, a clamping assembly and an elastic piece, a mounting groove is formed in the top of the clamping cylinder, a side opening is formed in the side wall, and the bottom of the mounting groove is connected with the chassis through the elastic piece. The clamping assembly comprises a side pressing block, a pressing plate and a driving mechanism, wherein the pressing plate is arranged above the clamping cylinder, a welding hole is formed in the pressing plate, and the driving mechanism is in transmission connection with the pressing plate to drive the pressing plate to lift above the clamping cylinder. The driving mechanism is in transmission connection with the side pressing block to drive the side pressing block to approach or be far away from the side opening along the direction parallel to the chassis, and the laser welding device is arranged above the pressing plate. The welding device for the current collecting disc of the battery core can solve the problem of press-fitting deformation of the current collecting disc and the winding core in the clamping and positioning process before welding in the related technology.

Description

Welding device for battery cell current collecting disc

Technical Field

The utility model relates to the technical field of new energy battery processing equipment, in particular to a welding device for a battery cell current collecting disc.

Background

The power battery of the electric automobile is mainly a cylindrical battery at present, and laser welding is often involved in the production process of the cylindrical battery, for example, before the battery core is put into a shell, the lugs at two ends are required to be welded with a current collecting disc by laser penetration welding respectively. As a large-sized cylindrical battery with a development trend, for example, a 4680 battery generally adopts a full-tab structure, which is different from a spot welding mode adopted by a traditional monopole tab or multipolar tab structure, and a battery core of the full-tab structure needs to be subjected to surface welding by adopting continuous laser.

In the related art, when welding a winding core and a current collecting disc in a cylindrical battery core, a battery core shell, the winding core and the current collecting disc are generally placed in corresponding fixtures according to a welding state, the current collecting disc is placed above the winding core and then is pressed by a corresponding pressing disc mechanism, and finally, the upper side is welded by a laser welding device.

In the welding mode in the related art, in the process of placing the current collecting disc to be welded above the battery core shell and the winding core, inclination between the current collecting disc and the full lug overcurrent surface at the top of the winding core due to assembly gap deviation between the clamp and the battery core shell is easy to occur, and in the process of pressing and positioning the clamp pressing disc, the current collecting disc or the winding core is easy to be crushed and deformed due to hard contact between the edge of the inclined current collecting disc and the winding core.

Disclosure of utility model

The embodiment of the utility model provides a welding device for a current collecting disc of an electric core, which can solve the problem of press-fitting deformation of the current collecting disc and a winding core in the clamping and positioning process before welding in the related technology. The technical scheme is as follows:

The embodiment of the utility model provides a welding device for a battery cell current collecting disc, which comprises the following components: the clamp is pressed and assembled and the laser welding device is used for welding,

The pressure equipment anchor clamps include chassis, clamping cylinder, clamping component and elastic component, the mounting groove has been seted up at the top of clamping cylinder, be provided with the intercommunication on the lateral wall of clamping cylinder the lateral part opening of mounting groove, the bottom of clamping cylinder passes through the elastic component with the chassis is connected, clamping component includes side briquetting, clamp plate, actuating mechanism, be provided with the welding hole on the clamp plate, actuating mechanism with the clamp plate side briquetting transmission is connected, in order to drive the clamp plate is in clamping cylinder top goes up and down, and the drive side briquetting is close to or keeps away from along the horizontal direction the lateral part opening, laser welding device set up in the clamp plate top.

Optionally, be provided with the piece that compresses tightly that is used for compressing tightly the mass flow dish in the welding hole, the piece that compresses tightly includes briquetting and a plurality of connecting rod, the briquetting is located the welding hole center and through a plurality of connecting rods with the pore wall connection in welding hole.

Optionally, a plurality of shielding gas outlet holes are formed in the side wall of the welding hole, and the shielding gas outlet holes are uniformly arranged at intervals along the circumferential direction of the welding hole.

Optionally, a plurality of external air inlets are arranged on the pressing plate, and the external air inlets are communicated with the plurality of shielding gas outlet holes.

Optionally, the side pressing block is provided with a clamping groove matched with the inner side wall of the clamping cylinder, and the clamping groove is opposite to the side opening.

Optionally, the pressing plate is detachably connected with the driving mechanism.

Optionally, the elastic member includes a plurality of buffer springs, and the plurality of buffer springs are arranged in a rectangular array.

Optionally, a limiting groove matched with the outer contour of the clamping cylinder is formed in the chassis, one end of the buffer spring is connected with the clamping cylinder, and the other end of the buffer spring is connected with the bottom wall of the limiting groove.

Optionally, the press-fitting fixture comprises a plurality of clamping cylinders, the chassis is a disc capable of rotating under external driving, and the clamping cylinders are uniformly arranged at intervals around the circumference of the chassis.

Optionally, the press-fitting fixture comprises a plurality of clamping assemblies, wherein the clamping assemblies are uniformly arranged at intervals around the circumference of the chassis and respectively correspond to the clamping cylinders one by one.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

The battery core current collecting disc welding device provided by the embodiment of the utility model is used for welding the current collecting disc of the cylindrical battery core, the battery core shell of the winding core is held by the clamping cylinder, and the side part of the clamping cylinder is provided with the side part opening. Under the drive of the driving mechanism, the side pressing block in the clamping assembly can be utilized to push and centralize the battery cell shell by the side opening side, and the coaxiality of the battery cell shell and the welding hole of the upper pressing plate is ensured in the light-emitting welding direction of the laser welding device. When the pressure plate is utilized to press down and fix the current collecting disc, the clamping cylinder can compress the elastic piece to descend for a certain distance, allowance and buffering are provided for the pressure plate to press down and swing the current collecting disc, damage caused by hard contact between the edge of the current collecting disc and the winding core is avoided, and the problem of press-fitting deformation of the current collecting disc and the winding core in the clamping and positioning process before welding in the related technology is effectively solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a welding device for a current collecting plate of a battery core according to an embodiment of the present utility model;

Fig. 2 is a schematic structural diagram of a connection structure between a clamping cylinder and a chassis according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a clamping assembly according to an embodiment of the present utility model.

In the figure:

1-press mounting a clamp; 2-a laser welding device; 11-chassis; 12-clamping a cylinder; 13-a clamping assembly; 14-an elastic member; 111-limit grooves; 121-mounting slots; 122-side opening; 131-side press blocks; 132-a platen; 133-a drive mechanism; 134-a compression member; 141-a buffer spring; 1311—a clamping groove; 1321-welding holes; 1322-a shielding gas outlet; 1323-external air inlet; 1331-a first drive cylinder; 1332-a second drive cylinder; 1341-briquetting; 1342-linkage; an m-manifold tray; n-winding cores; o-cell housing.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

The welding mode in the related art is adopted, the current collecting disc to be welded is easy to incline between the current collecting disc and the full lug overcurrent surface at the top of the winding core due to assembly gap deviation between the clamp and the battery core shell in the process of placing the current collecting disc to be welded above the battery core shell and the winding core, and the current collecting disc or the winding core is crushed and deformed due to hard contact between the edge of the inclined current collecting disc and the winding core in the process of pressing and positioning the clamp pressing disc.

Fig. 1 is a schematic perspective view of a welding device for a current collecting plate of a battery cell according to an embodiment of the utility model. Fig. 2 is a schematic structural diagram of a connection structure between a clamping cylinder and a chassis according to an embodiment of the present utility model. Fig. 3 is a schematic structural diagram of a clamping assembly according to an embodiment of the present utility model. As shown in fig. 1 to 3, through practice, an embodiment of the present utility model provides a die-collecting plate welding device, which includes a press-fitting jig 1 and a laser welding device 2.

The press-fitting jig 1 comprises a chassis 11, a clamping cylinder 12, a clamping assembly 13 and an elastic member 14. The top of the clamping cylinder 12 is provided with a mounting groove 121, the side wall of the clamping cylinder 12 is provided with a side opening 122 communicated with the mounting groove 121, and the bottom of the clamping cylinder 12 is connected with the chassis 11 through an elastic piece 14. The clamping assembly 13 comprises a side pressing block 131, a pressing plate 132 and a driving mechanism 133, wherein the driving mechanism 133 is arranged beside the clamping cylinder 12, the pressing plate 132 is arranged above the clamping cylinder 12, a welding hole 1321 is formed in the pressing plate 132, and the driving mechanism 133 is in transmission connection with the pressing plate 132 to drive the pressing plate 132 to lift in the direction vertical to the chassis 11. The side pressing block 131 is arranged between the clamping cylinder 12 and the driving mechanism 133, a clamping groove 1311 matched with the inner side wall of the clamping cylinder 12 is arranged on the side pressing block 131, the clamping groove 1311 faces the side opening 122, the driving mechanism 133 is in transmission connection with the side pressing block 131 to drive the side pressing block 131 to move along the direction parallel to the chassis 11, and the laser welding device 2 is arranged above the pressing plate 132.

In the embodiment of the utility model, when the welding device for the current collecting disc of the battery core is adopted for welding, firstly, the battery core shell o with the winding core n placed inside is correspondingly inserted into the mounting groove 121 on the clamping cylinder 12, and then the current collecting disc m with welding is placed on the full lug current passing surface at the top of the winding core n, so that the assembly is completed. The platen 132 and the side blocks 131 are then drive controlled by a drive mechanism 133. In an exemplary embodiment of the present utility model, the drive mechanism 133 includes a longitudinally disposed first drive cylinder 1331 and a laterally disposed second drive cylinder 1332. The telescopic rod of the first driving cylinder 1331 is connected to the pressing plate 132, and the telescopic rod of the second driving cylinder 1332 is connected to the side pressure block 131. The second driving cylinder 1332 drives the side pressing block 131 to approach the clamping cylinder 12 and splice with the side opening 122, the clamping groove 1311 on the side pressing block 131 clamps the battery cell housing o by the side opening 122, and the battery cell housing o loaded in the side opening 122 can be tightly attached to the inner side wall of the clamping cylinder 12 by pushing and righting the side pressing block 131, so that coaxiality with the welding hole 1321 of the upper pressing plate 132 is ensured, and dimensional deviation caused by an assembly gap is eliminated. Then the first driving cylinder 1331 drives the pressing plate 132 to descend to compress the current collecting disc m, so that the current collecting disc m can be tightly attached to the full lug overcurrent surface of the winding core m, and after the pressing plate 132 compresses the current collecting disc m, the current collecting disc m and the winding core n can be welded through light emitted by the laser welding device 2 above. During the pressing down process, the elastic member 14 at the bottom of the clamping cylinder 12 can start the buffering function, and a certain margin is reserved for the pressing down of the pressing plate 132. When the collecting disc m is placed at a certain angle and inclined, that is, has a certain coaxial deviation with the pressing plate 132, the clamping cylinder 12 can compress the elastic piece 14 to follow a certain distance to descend when the pressing plate 132 is pressed down to align the collecting disc m, so that the edge of the collecting disc m is prevented from being damaged due to hard contact with the winding core n.

The current collecting disc welding device for the battery cell in the embodiment of the utility model is used for welding the current collecting disc m of the cylindrical battery cell, the battery cell shell o of the winding core n is held by the clamping cylinder 12, and the side part of the clamping cylinder 12 is provided with the side part opening 122. Under the driving of the driving mechanism 133, the side pressure block 132 in the clamping assembly 13 can be utilized to push and centralize the battery cell casing o from the side opening 122 side, so that the coaxiality of the battery cell casing o and the welding hole 1321 of the upper pressure plate 132 is ensured in the light emitting welding direction of the laser welding device 2. When the pressure plate 132 is utilized to press and fix the current collecting disc m, the clamping cylinder 12 can compress the elastic piece 14 to descend along with the elastic piece by a certain distance, so that allowance and buffering are provided for the pressure plate 132 to press and align the current collecting disc m, damage caused by hard contact between the edge of the current collecting disc m and the winding core n is avoided, and the problem of press mounting deformation of the current collecting disc and the winding core in the clamping and positioning process before welding in the related art is effectively solved.

Optionally, a pressing member 134 for pressing the collecting tray m is disposed in the welding hole 1321, and the pressing member 134 includes a pressing block 1341 and a plurality of connecting rods 1342, and the pressing block 1341 is located at the center of the welding hole 1321 and is connected to the wall of the welding hole 1321 through the plurality of connecting rods 1342. Illustratively, in the embodiment of the present utility model, when pressing down the current collecting tray m, the pressing plate 132 presses down the middle of the current collecting tray m with four links 1342, which are flush with the lower end surface, and the bottom end surface of the pressing block 1341 simultaneously to the middle of the current collecting tray m, so as to ensure the average pressing stress to the current collecting tray m, and the four links are disposed along the radial direction of the welding hole 1321 and at equal angles, so that sufficient space is left for laser welding while connecting with the pressing block 1341. By providing the pressing piece 134 in the welding hole 1321, the clamping stability to the current collecting tray m can be further improved.

Optionally, a plurality of shielding gas outlet holes 1322 are disposed on a sidewall of the welding hole 1321, and the plurality of shielding gas outlet holes 1322 are uniformly spaced along a circumferential direction of the welding hole 1321. Illustratively, in an embodiment of the present utility model, the platen 132 is provided with a plurality of external air inlets 1323, and the external air inlets 1323 are in communication with a plurality of shielding gas outlets 1322. The external air supply equipment can be connected through the external air inlet 1323 on the pressing plate 132, and when laser welding is performed, the shielding gas is blown to the welding position of the current collecting disc m through the shielding gas outlet holes 1322 which are uniformly arranged on the side wall of the welding hole 1321, so that the shielding gas is ensured to uniformly diffuse and cover the welding position, the oxidation phenomenon after welding is effectively avoided, the welding quality is ensured, and the practicability of the welding device of the current collecting disc of the battery cell is improved.

Optionally, the platen 132 is detachably connected to the drive mechanism 133. Illustratively, in the embodiment of the present utility model, the pressing plate 132 with the welding holes 1321 having different diameter sizes may be replaced according to actual requirements, so as to adapt to the pressing and clamping requirements of the current collecting plates m with different specifications, thereby improving the suitability of the welding device for the current collecting plates of the battery core.

Alternatively, the elastic member 14 includes a plurality of buffer springs 141, and the plurality of buffer springs 141 are arranged in a rectangular array. Illustratively, in the embodiment of the present utility model, the chassis 11 is provided with a limit groove 111 matching the outer contour of the clamping cylinder 12. Four buffer springs 141 are disposed in each limit groove 111 corresponding to the single clamping cylinder 12, one end of each buffer spring 141 is connected with the clamping cylinder 12, and the other end is connected with the bottom wall of the limit groove 111. Four buffer springs 141 arranged in a rectangular array can ensure stable support of the clamping cylinder 12 in the shrinkage process, and avoid the influence of inclination caused by uneven stress on the welding accuracy above. Meanwhile, when the buffer spring 141 is compressed, the bottom section of the clamping cylinder 12 also correspondingly enters the corresponding limiting groove 111, and the side wall of the limiting groove 111 can further limit and guide the descending path of the clamping cylinder 12, so that the inclination is avoided, and the welding precision of the practical cell collecting disc welding device is further improved.

Alternatively, the press-fitting jig 1 includes a plurality of holding cylinders 12, and the chassis 11 is a disk rotatable under external drive, the plurality of holding cylinders 12 being uniformly spaced around the circumference of the chassis 11. Illustratively, in the embodiment of the present utility model, six clamping drums 12 are disposed on the circular chassis 11 at equal angular intervals, the press-fit fixture 1 includes two clamping assemblies 13, the two clamping assemblies 13 are uniformly spaced around the circumference of the chassis 11 and respectively correspond to the clamping drums 12 one by one, the spacing angle between the two clamping assemblies 13 is 60 °, respectively correspond to the two adjacent clamping drums 12, and two laser welding devices 2 are correspondingly configured above the pressing plates 132 of the two clamping assemblies 13. The six clamping cylinders 12 which are arranged at equal angles can be divided into three groups along the rotation direction of the chassis 11 instead of the welding device for the battery cell collecting plate. One group serves as a loading station, the adjacent group is respectively matched with the two clamping assemblies 13 and the laser welding device 2 to serve as a welding station, and the last group can serve as a blanking station. Through periodic rotatory chassis 11, can realize simultaneously that material loading, mass flow dish m's welding and unloading can effectively improve production efficiency.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.

Claims

1. A die-plate welding device, comprising: a press-fitting clamp (1) and a laser welding device (2),

The utility model provides a press fitting fixture (1) includes chassis (11), clamping cylinder (12), clamping component (13) and elastic component (14), mounting groove (121) have been seted up at the top of clamping cylinder (12), be provided with the intercommunication on the lateral wall of clamping cylinder (12) lateral part opening (122) of mounting groove (121), the bottom of clamping cylinder (12) is passed through elastic component (14) with chassis (11) are connected, clamping component (13) include side briquetting (131), clamp plate (132) and actuating mechanism (133), be provided with welding hole (1321) on clamp plate (132), actuating mechanism (133) with clamp plate (132) transmission is connected, so as to drive clamp plate (132) are in clamping cylinder (12) top goes up and down, and drive side briquetting (131) are close to or keep away from along the horizontal direction lateral part opening (122), laser welding device (2) set up in clamp plate (132) top.

2. The welding device for the battery cell current collecting disc according to claim 1, wherein a pressing piece (134) for pressing the current collecting disc (m) is arranged in the welding hole (1321), the pressing piece (134) comprises a pressing block (1341) and a plurality of connecting rods (1342), and the pressing block (1341) is located in the center of the welding hole (1321) and is connected with the hole wall of the welding hole (1321) through the plurality of connecting rods (1342).

3. The welding device for the cell collecting plate according to claim 2, wherein a plurality of shielding gas outlet holes (1322) are arranged on the side wall of the welding hole (1321), and the plurality of shielding gas outlet holes (1322) are uniformly arranged at intervals along the circumferential direction of the welding hole (1321).

4. The welding device for a battery cell collecting plate according to claim 3, wherein a plurality of external air inlets (1323) are arranged on the pressing plate (132), and the external air inlets (1323) are communicated with the plurality of shielding gas outlet holes (1322).

5. The welding device for the battery cell collecting tray according to claim 1, wherein a clamping groove (1311) matched with the inner side wall of the clamping cylinder (12) is formed on the side pressing block (131), and the clamping groove (1311) faces the side opening (122).

6. The die-current collecting plate welding apparatus according to claim 1, wherein the pressing plate (132) is detachably connected to the driving mechanism (133).

7. The cell collector plate welding device according to any one of claims 1 to 6, wherein the elastic member (14) includes a plurality of buffer springs (141), and a plurality of the buffer springs (141) are arranged in a rectangular array.

8. The welding device for the battery cell current collecting disc according to claim 7, wherein a limiting groove (111) matched with the outer contour of the clamping cylinder (12) is formed in the chassis (11), one end of the buffer spring (141) is connected with the clamping cylinder (12), and the other end of the buffer spring (141) is connected with the bottom wall of the limiting groove (111).

9. The cell collector plate welding device according to any one of claims 1 to 6, wherein the press-fit jig (1) includes a plurality of the clamping cylinders (12), the chassis (11) is a circular plate rotatable under an external drive, and the plurality of the clamping cylinders (12) are uniformly spaced around the circumference of the chassis (11).

10. The welding device for the battery cell current collecting disc according to claim 9, wherein the press-fitting clamp (1) comprises a plurality of clamping assemblies (13), and the clamping assemblies (13) are uniformly arranged at intervals around the circumference of the chassis (11) and are respectively in one-to-one correspondence with the clamping cylinders (12).