CN114029618B

CN114029618B - Lithium battery laser welding equipment for new energy automobile and use method

Info

Publication number: CN114029618B
Application number: CN202210022947.7A
Authority: CN
Inventors: 王志伟; 刘俊; 何瑞东
Original assignee: Herolaser Intelligent Equipment Heyuan Co Ltd
Current assignee: Herolaser Intelligent Equipment Heyuan Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-04-12
Anticipated expiration: 2042-01-10
Also published as: CN114029618A

Abstract

The invention relates to the field of lithium battery laser welding devices, in particular to lithium battery laser welding equipment for a new energy automobile and a using method; the lithium battery laser welding equipment comprises a workbench, a laser welding device, a fixing mechanism, a material storing mechanism and a feeding mechanism. This kind of a lithium cell laser welding equipment for new energy automobile, through first spring, the cooperation of activity limiting plate and layer board, make it can stabilize to add to the lithium cell core of different diameters and hold, simultaneously under the cooperation of adjusting bolt and first spring, adjust the height of first roller, make under its cooperation with the second roller, can convey the electrode slice of different thickness, simple structure and commonality are higher, mechanical cost greatly reduced, cooperation through two conveyer belts and layer board, can make putting of lithium cell core realize the automation, simultaneously under the cooperation of stock mechanism and feeding mechanism, realize that electrode slice autoloading is put, the continuity of production has been guaranteed, production efficiency is improved.

Description

Lithium battery laser welding equipment for new energy automobile and use method

Technical Field

The invention relates to the field of lithium battery laser welding devices, in particular to lithium battery laser welding equipment for a new energy automobile and a using method of the lithium battery laser welding equipment.

Background

In laser welding, a laser beam is used as an energy source, and is focused into a high-power-density beam by a focusing device to irradiate the surface of a workpiece for heating, so that the interior of the material is melted under the heat conduction action of a metal material to form a specific molten pool. When laser welding is adopted, the heat affected zone of a workpiece is small, a welding spot is small, the welding size precision is high, the welding mode belongs to non-contact welding, and more advanced laser equipment plays a key role in manufacturing the lithium ion battery under the requirements of intelligent manufacturing upgrade and continuous improvement of safety performance of a power lithium battery.

The following problems in the prior art are not well solved: 1. in the process of producing the lithium battery, a plurality of lithium battery cells are required to be connected together through electrode plates, most manufacturers manually fix and clamp the whole row of lithium battery cells in corresponding types of clamps and weld the lithium battery cells, but the clamp is not strong in universality, so that the production cost is high; 2. the efficiency of manually placing the battery core and the electrode plate of the lithium battery is low; 3. in order to keep the stability of the electrode slice in the welding process, the two sides of the electrode slice need to be manually pressed, and the safety is low.

Disclosure of Invention

The invention aims to provide lithium battery laser welding equipment for a new energy automobile and a using method thereof, and aims to solve the problems that the clamp provided by the background technology is low in universality, so that the production cost is high, the efficiency of manually placing a lithium battery cell and an electrode plate is low, and the stability and the safety of the electrode plate in the welding process are poor.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a lithium cell laser welding equipment for new energy automobile, includes the workstation, the top of workstation swing joint has two conveyer belts and fixedly connected with laser welding device, fixed establishment and stock mechanism respectively, the top fixedly connected with feeding mechanism of stock mechanism inner wall, one side fixedly connected with motor of stock mechanism inner wall, the output fixedly connected with concave wheel axle of motor, the other end of concave wheel axle run through stock mechanism and rather than one side fixed connection of the drive wheel of avris, the other end sliding connection of drive wheel has the slide bar, the other end fixedly connected with rack of slide bar, the drive wheel passes through drive belt and stock mechanism swing joint.

Preferably, the fixing mechanism comprises a base, the base is fixedly connected to the top of the workbench, the upper side and the lower side of the front surface of the base are movably inserted with a movable limiting plate and a supporting plate respectively, the back surface of the movable limiting plate is fixedly connected with the base through a first spring, the back surface of the base is fixedly connected with an electronic hydraulic rod, the telescopic end of the electronic hydraulic rod penetrates through the base and is fixedly connected with one side of the supporting plate at the side thereof, one side of the base is provided with a transverse groove penetrating to the other side thereof, the bottom of the inner wall of the transverse groove is movably connected with a movable rod, the top end of the movable rod penetrates through the base and is fixedly connected with a pressing block above the base, the rack is movably inserted in the transverse groove, the rack is meshed with the lower part of the movable rod, one side of the outer wall of the movable rod is provided with a sliding groove, the back surface of the base is in threaded connection with a limiting bolt, and the other end of the limiting bolt penetrates through the base and is connected in the sliding groove, one side fixedly connected with of base keeps off the frame, the layer board has the lithium cell with the relative centre gripping of activity limiting plate one side.

Preferably, the material storage mechanism comprises a mechanical box, the mechanical box is fixedly connected to the top of the workbench, a through groove penetrating to the other side of the mechanical box is formed in one side of the mechanical box, limiting frames are fixedly connected to both sides of the top of the mechanical box, sliding blocks are connected in the limiting frames in a sliding mode, adjusting bolts are connected to the top of the limiting frames in a threaded mode, the adjusting bolts penetrate through the limiting frames and are movably connected with the top ends of the sliding blocks in the limiting frames, second springs are movably sleeved on the adjusting bolts, a first roller is movably connected to one side, opposite to the two sliding blocks, of the inner wall of the mechanical box, a second roller is movably connected to one side of a belt pulley, one end of the second roller penetrates through the mechanical box and is fixedly connected with one side of the belt pulley on the side of the mechanical box, the belt pulley is movably connected with a driving wheel through a driving belt, and limiting columns are fixedly connected to four corners of the top of the mechanical box, and the feeding mechanism is fixedly connected to the top of the inner wall of the mechanical box.

Preferably, feeding mechanism includes the balladeur train, balladeur train fixed connection is at the top of machinery box inner wall, sliding connection has the slider in the balladeur train, third spring and activity are cup jointed in the slider activity, the top that the activity was tied runs through the balladeur train and the activity interlude is leading to the inslot, one side swing joint that the slider inner wall is relative has the stock, one side swing joint that the bottom and the machinery box inner wall of stock are relative, one side swing joint of stock has the gyro wheel, one side of gyro wheel and one side activity overlap joint of concave wheel axle, one side of stock is through one side fixed connection of fourth spring and balladeur train.

Preferably, the movable rod is formed by fixedly sleeving a helical gear on a round rod, and one side of the rack is provided with helical teeth matched with the helical gear.

Preferably, the fixing mechanism is positioned between the two conveyor belts, and the horizontal height of the top surfaces of the two conveyor belts is equal to that of the bottom surface of the inner wall of the supporting plate.

Preferably, one side of the sliding rod is provided with an arc-shaped groove penetrating to the other side of the sliding rod, and the driving wheel is connected with the end part of the driving wheel towards the other side in the arc-shaped groove in a sliding manner.

The invention also provides a using method of the lithium battery laser welding equipment for the new energy automobile, which comprises the following steps:

s1, firstly, the lithium battery to be welded is conveyed to the top of the supporting plate through a transmission belt close to one side of the material storage mechanism, the supporting plate is translated to the top of the base through an electronic hydraulic rod, and the lithium battery is stably clamped under the matching of a first spring and a movable limiting plate, so that the displacement in the welding process is avoided;

s2, starting a motor to drive the concave wheel shaft and the driving wheel to synchronously rotate, when the concave side of the concave wheel shaft rotates to one side of the roller, the long rod drives the sliding block to slide to one side close to the second roller under the action of a fourth spring, and the raised movable bolt shifts the side of the bottommost electrode plate to slide to the gap between the second roller and the first roller;

s3, under the transmission effect of the transmission belt, the second roller synchronously rotates, the electrode plates which slide out can be conveyed to the top of the lithium battery in a single piece under the matching of the first roller, the horizontal height of the first roller can be adjusted by rotating two adjusting bolts to adapt to the thicknesses of different electrode plates, the electrode plates completely fall on the top of the lithium battery and are blocked by the blocking frame to avoid sliding out of a set position, so that the conveying of the electrode plates is completed, when the concave side of the concave wheel shaft is separated from the attachment of the roller, the convex side of the concave wheel shaft pushes the roller to drive the sliding block to slide and reset in the direction far away from the second roller, and when the movable bolt moves to the position separated from the bottom surface of the next electrode plate at the top, under the action of the third spring, the movable bolt upwards pops up and is located at the side of the next electrode plate at the top again;

s4, when the activity bolt resets, under the arc wall cooperation that drive wheel one side tip and slide bar were seted up, promote the horizontal translation of one side of rack to the movable rod, the movable rod of meshing therewith is rotatory thereupon, under the cooperation of spout and spacing bolt, the movable rod drives briquetting pivoted and pushes down simultaneously, it is fixed to the electrode slice to make it, the welding of the laser welding device of being convenient for, after the welding, under the promotion of electron hydraulic stem, the layer board drives the good lithium cell group of welding and resets, under new lithium cell promotes, the top translation of another conveyer belt is organized to the lithium cell, accomplish a welding.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the first spring, the movable limiting plate and the supporting plate are matched to stably hold lithium battery cores with different diameters, and meanwhile, the height of the first roller is adjusted under the matching of the adjusting bolt and the first spring, so that electrode plates with different thicknesses can be conveyed under the matching of the first roller and the second roller, the structure is simple, the universality is higher, and the mechanical cost is greatly reduced.

According to the invention, through the cooperation of the two conveyor belts and the supporting plate, the automatic arrangement of the lithium battery cell can be realized, and meanwhile, under the cooperation of the material storage mechanism and the feeding mechanism, the automatic feeding and arrangement of the electrode plates are realized, so that the production continuity is ensured, and the production efficiency is greatly and effectively improved.

According to the invention, through the matching of the rack and the movable rod, the feeding mechanism can drive the pressing block to rotate and press down after feeding is completed, so that the electrode plate is fixed, the electrode plate is prevented from being displaced in the welding process of the laser welding device, the stability is better, meanwhile, the electrode plate is prevented from being manually supported, and the safety is improved.

Drawings

Fig. 1 is a schematic diagram of a first three-dimensional structure of a lithium battery laser welding device according to an embodiment of the invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a schematic diagram of a second three-dimensional structure of a lithium battery laser welding device according to an embodiment of the invention;

fig. 4 is a schematic diagram of a third perspective structure of a lithium battery laser welding device according to an embodiment of the invention;

fig. 5 is a schematic side view of a laser welding apparatus for a lithium battery according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a carriage and other structures in a feeding mechanism of a lithium battery laser welding device according to an embodiment of the present invention;

fig. 7 is a schematic side view of a carriage and the like in a feeding mechanism of a lithium battery laser welding device according to an embodiment of the present invention;

fig. 8 is a schematic side view of a base and the like in a fixing mechanism of a lithium battery laser welding device according to an embodiment of the present invention;

fig. 9 is a schematic side view of a movable rod of a lithium battery laser welding device according to an embodiment of the invention.

In the figure: 1. a work table; 2. a conveyor belt; 3. a laser welding device; 4. a fixing mechanism; 401. a base; 402. a movable limit plate; 403. a support plate; 404. a first spring; 405. an electronic hydraulic rod; 406. a transverse groove; 407. a movable rod; 408. briquetting; 409. a chute; 410. a limit bolt; 5. a material storage mechanism; 501. a mechanical box; 502. a through groove; 503. a limiting frame; 504. a slider; 505. adjusting the bolt; 506. a second spring; 507. a first roller; 508. a second roller; 509. a belt pulley; 510. a limiting column; 6. a feeding mechanism; 601. a carriage; 602. a slider; 603. a third spring; 604. a movable bolt; 605. a long rod; 606. a roller; 607. a fourth spring; 7. a motor; 8. a concave wheel shaft; 9. a driving wheel; 10. a slide bar; 11. a rack; 12. a transmission belt; 13. a lithium battery.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by workers skilled in the art without any inventive work based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 9, the present invention provides a technical solution: the utility model provides a lithium cell laser welding equipment for new energy automobile, includes workstation 1, the top of workstation 1 swing joint has two conveyer belts 2 and fixedly connected with laser welding device 3, fixed establishment 4 and stock mechanism 5 respectively, the top fixedly connected with feeding mechanism 6 of 5 inner walls of stock mechanism, one side fixedly connected with motor 7 of 5 inner walls of stock mechanism, the output fixedly connected with hollow shaft 8 of motor 7, hollow shaft 8's the other end run through stock mechanism 5 and rather than one side fixed connection of the drive wheel 9 of avris, and the other end sliding connection of drive wheel 9 has slide bar 10, the other end fixedly connected with rack 11 of slide bar 10, drive wheel 9 passes through drive belt 12 and stock mechanism 5 swing joint.

In this embodiment, as shown in fig. 1, fig. 3, fig. 4, fig. 8 and fig. 9, the fixing mechanism 4 includes a base 401, the base 401 is fixedly connected to the top of the workbench 1, a movable limiting plate 402 and a supporting plate 403 are movably inserted into upper and lower sides of the front surface of the base 401, the back surface of the movable limiting plate 402 is fixedly connected to the base 401 through a first spring 404, an electronic hydraulic rod 405 is fixedly connected to the back surface of the base 401, a telescopic end of the electronic hydraulic rod 405 penetrates through the base 401 and is fixedly connected to one side of the supporting plate 403 on the side thereof, a transverse groove 406 penetrating to the other side is formed on one side of the base 401, a movable rod 407 is movably connected to the bottom of the inner wall of the transverse groove 406, the top end of the movable rod 407 penetrates through the base 401 and is fixedly connected to a pressing block 408 above the base, a rack 11 is movably inserted into the transverse groove 406, the rack 11 is engaged with the lower portion of the movable rod 407, the sliding groove 409 is formed in one side of the outer wall of the movable rod 407, the limiting bolt 410 is in threaded connection with the back of the base 401, the other end of the limiting bolt 410 penetrates through the base 401 and is connected into the sliding groove 409 in a sliding mode, the blocking frame is fixedly connected to one side of the base 401, the lithium battery 13 is clamped on one side, opposite to the supporting plate 403 and the movable limiting plate 402, of the supporting plate 403, the side section of the sliding groove 409 is of a J-shaped structure, through the cooperation of the first spring 404, the movable limiting plate 402 and the supporting plate 403, the lithium battery 13 cores with different diameters can be stably clamped, meanwhile, under the cooperation of the adjusting bolt 505 and the first spring 404, the height of the first roller 507 is adjusted, the electrode plates with different thicknesses can be conveyed under the cooperation of the second roller 508, the structure is simple, the universality is high, and the mechanical cost is greatly reduced.

In this embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, the material storing mechanism 5 includes a mechanical box 501, the mechanical box 501 is fixedly connected to the top of the workbench 1, a through groove 502 penetrating through one side of the mechanical box 501 to the other side thereof is formed, both sides of the top of the mechanical box 501 are fixedly connected with a limiting frame 503, a sliding block 504 is slidably connected in the limiting frame 503, an adjusting bolt 505 is threadedly connected to the top of the limiting frame 503, the adjusting bolt 505 penetrates through the limiting frame 503 and is movably connected to the top end of the sliding block 504 therein, a second spring 506 is movably sleeved on the adjusting bolt 505, a first roller 507 is movably connected to one side opposite to the two sliding blocks 504, a second roller 508 is movably connected to one side opposite to the inner wall of the mechanical box 501, one end of the second roller 508 penetrates through the mechanical box 501 and is fixedly connected to one side of a belt pulley 509 at the side thereof, the belt pulley 509 is movably connected with the driving wheel 9 through a driving belt 12, four corners of the top of the mechanical box 501 are fixedly connected with limit columns 510, and the feeding mechanism 6 is fixedly connected to the top of the inner wall of the mechanical box 501.

In this embodiment, as shown in fig. 3, 5, 6, and 7, the feeding mechanism 6 includes a sliding frame 601, the sliding frame 601 is fixedly connected to the top of the inner wall of the mechanical box 501, a sliding block 602 is slidably connected in the sliding frame 601, a third spring 603 and a movable bolt 604 are movably sleeved in the sliding block 602, the top end of the movable bolt 604 penetrates through the sliding frame 601 and is movably inserted into the through slot 502, a long rod 605 is movably connected to one side of the inner wall of the sliding block 602, the bottom end of the long rod 605 is movably connected to one side of the inner wall of the mechanical box 501, a roller 606 is movably connected to one side of the long rod 605, one side of the roller 606 is movably overlapped with one side of the concave wheel shaft 8, and one side of the long rod 605 is fixedly connected to one side of the sliding frame 601 through a fourth spring 607.

In this embodiment, as shown in fig. 3, fig. 5, fig. 6, and fig. 7, the movable rod 407 is formed by fixedly sleeving a circular rod with a helical gear, one side of the rack 11 is provided with helical teeth matched with the helical gear, and by matching the rack 11 with the movable rod 407, after the feeding mechanism 6 finishes feeding, the pressing block 408 is driven to rotate and press down to fix the electrode plate, so that the electrode plate is prevented from being manually supported when the laser welding device 3 is in a welding process and displaced, and the stability is good, and the safety is improved.

In this embodiment, as shown in fig. 1, fig. 3, fig. 4, fig. 8, and fig. 9, the fixing mechanism 4 is located between the two conveyor belts 2, the horizontal height of the top surfaces of the two conveyor belts 2 is equal to the horizontal height of the bottom surface of the inner wall of the supporting plate 403, the placing of the lithium battery 13 electric core can be automated through the cooperation of the two conveyor belts 2 and the supporting plate 403, meanwhile, the placing of the electrode plate is automatically performed under the cooperation of the material storage mechanism 5 and the feeding mechanism 6, the continuity of production is ensured, and the production efficiency is greatly and effectively improved.

In this embodiment, as shown in fig. 3, 4, 5 and 7, an arc-shaped groove penetrating to the other side is formed on one side of the sliding rod 10, and the driving wheel 9 is slidably connected in the arc-shaped groove with the end portion facing to the other side.

The lithium battery laser welding equipment for the new energy automobile in the embodiment of the invention is used in a working method and comprises the following steps:

s1, firstly, the lithium battery 13 to be welded is conveyed to the top of the supporting plate 403 through the transmission belt 12 close to one side of the material storage mechanism 5, the supporting plate 403 is translated to the top of the base 401 through the electronic hydraulic rod 405, and the lithium battery 13 is stably clamped under the matching of the first spring 404 and the movable limiting plate 402, so that the displacement in the welding process is avoided;

s2, starting the motor 7 to drive the concave wheel shaft 8 and the driving wheel 9 to run synchronously, when the concave side of the concave wheel shaft 8 rotates to one side of the roller 606, the long rod 605 drives the sliding block 504 to slide to one side close to the second roller 508 under the action of the fourth spring 607, and the protruded movable bolt 604 shifts the side of the electrode plate at the bottommost part to slide to the gap between the second roller 508 and the first roller 507;

s3, under the transmission effect of the transmission belt 12, the second roller 508 rotates synchronously, the electrode plates which slide out can be conveyed to the top of the lithium battery 13 in a single piece under the matching of the first roller 507, the horizontal height of the first roller 507 can be adjusted by rotating the two adjusting bolts 505 to adapt to the thicknesses of different electrode plates, the electrode plates completely fall on the top of the lithium battery 13 and are blocked by a blocking frame to avoid sliding out of a set position, so that the conveying of the electrode plates is completed, when the concave side of the concave wheel shaft 8 is separated from the fit with the roller 606, the protruding side pushes the roller 606 to drive the sliding block 504 to slide and reset in the direction far away from the second roller 508, and when the movable bolt 604 moves to the position separated from the bottom surface of the next electrode plate at the top, under the action of the third spring 603, the movable bolt 604 pops upwards and is located at the side of the next electrode plate;

s4, when the movable bolt 604 is reset, under the matching of the end part of one side of the driving wheel 9 and the arc-shaped groove formed in the sliding rod 10, the rack 11 is pushed to transversely translate towards one side of the movable rod 407, the movable rod 407 meshed with the rack rotates along with the rack, under the matching of the sliding groove 409 and the limiting bolt 410, the movable rod 407 drives the pressing block 408 to rotate and press downwards, so that the pressing block is fixed on an electrode plate, welding of the laser welding device 3 is facilitated, after the welding is finished, under the pushing of the electronic hydraulic rod 405, the supporting plate 403 drives the welded lithium battery 13 group to reset, under the pushing of a new lithium battery 13, the lithium battery 13 group translates towards the top of another conveyor belt 2, and one-time welding is completed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lithium cell laser welding equipment for new energy automobile, includes workstation (1), its characterized in that: the top of the workbench (1) is respectively and movably connected with two conveyor belts (2), a laser welding device (3), a fixing mechanism (4) and a material storage mechanism (5), the top of the inner wall of the material storage mechanism (5) is fixedly connected with a feeding mechanism (6), one side of the inner wall of the material storage mechanism (5) is fixedly connected with a motor (7), the output end of the motor (7) is fixedly connected with a concave wheel shaft (8), the other end of the concave wheel shaft (8) penetrates through the material storage mechanism (5) and is fixedly connected with one side of a driving wheel (9) on the side of the material storage mechanism, the other end of the driving wheel (9) is connected with a sliding rod (10) in a sliding manner, the other end of the sliding rod (10) is fixedly connected with a rack (11), and the driving wheel (9) is movably connected with the material storage mechanism (5) through a driving belt (12);

the fixing mechanism (4) comprises a base (401), the base (401) is fixedly connected to the top of the workbench (1), the upper side and the lower side of the front of the base (401) are movably inserted with a movable limiting plate (402) and a supporting plate (403) respectively, the back of the movable limiting plate (402) is fixedly connected with the base (401) through a first spring (404), the back of the base (401) is fixedly connected with an electronic hydraulic rod (405), the telescopic end of the electronic hydraulic rod (405) penetrates through the base (401) and is fixedly connected with one side of the side supporting plate (403), one side of the base (401) is provided with a transverse groove (406) penetrating to the other side of the base, the bottom of the inner wall of the transverse groove (406) is movably connected with a movable rod (407), the top end of the movable rod (407) penetrates through the base (401) and is fixedly connected with a pressing block (408) above the base, the rack (11) is movably inserted in the transverse groove (406), the rack (11) is meshed with the lower part of the movable rod (407), a sliding groove (409) is formed in one side of the outer wall of the movable rod (407), a limiting bolt (410) is connected to the back face of the base (401) in a threaded manner, the other end of the limiting bolt (410) penetrates through the base (401) and is connected in the sliding groove (409) in a sliding manner, a blocking frame is fixedly connected to one side of the base (401), and a lithium battery (13) is clamped on one side, opposite to the supporting plate (403) and the movable limiting plate (402);

the movable rod (407) is formed by fixedly sleeving a helical gear on a round rod, and one side of the rack (11) is provided with helical teeth matched with the helical gear.

2. The lithium battery laser welding device for the new energy automobile according to claim 1, characterized in that: material storage mechanism (5) is including mechanical box (501), mechanical box (501) fixed connection is at the top of workstation (1), logical groove (502) that run through to its opposite side are seted up to one side of mechanical box (501), the equal fixedly connected with in both sides of the top of mechanical box (501) spacing frame (503), sliding connection has sliding block (504) in spacing frame (503), the top threaded connection of spacing frame (503) has adjusting bolt (505), adjusting bolt (505) run through spacing frame (503) and rather than the top swing joint of sliding block (504), second spring (506), two have been cup jointed in the activity on adjusting bolt (505) sliding block (504) one side swing joint relative has first roller (507), mechanical box (501) one side swing joint relative in inner wall has second roller (508), the one end of second roller (508) run through mechanical box (501) and rather than a belt pulley (509) of avris Side fixed connection, belt pulley (509) pass through drive belt (12) and drive wheel (9) swing joint, the equal fixedly connected with spacing post (510) in four corners at machinery box (501) top, feeding mechanism (6) fixed connection is at the top of machinery box (501) inner wall.

3. The lithium battery laser welding device for the new energy automobile according to claim 2, characterized in that: feeding mechanism (6) includes balladeur train (601), balladeur train (601) fixed connection is at the top of mechanical box (501) inner wall, sliding connection has slider (602) in balladeur train (601), slider (602) internalization has cup jointed third spring (603) and activity and has tied (604), the top of activity tie (604) runs through balladeur train (601) and the activity alternates in logical groove (502), the relative one side swing joint of slider (602) inner wall has stock (605), the bottom of stock (605) and the relative one side swing joint of mechanical box (501) inner wall, one side swing joint of stock (605) has gyro wheel (606), one side and the activity overlap joint of one side of notch wheel axle (8) of gyro wheel (606), one side of stock (605) is through fourth spring (607) and one side fixed connection of balladeur train (601).

4. The lithium battery laser welding device for the new energy automobile according to claim 1, characterized in that: the fixing mechanism (4) is positioned between the two conveyor belts (2), and the horizontal height of the top surfaces of the two conveyor belts (2) is equal to that of the bottom surface of the inner wall of the supporting plate (403).

5. The lithium battery laser welding device for the new energy automobile according to claim 1, characterized in that: an arc-shaped groove penetrating to the other side of the sliding rod (10) is formed in one side of the sliding rod, and the driving wheel (9) and the end part of the driving wheel, facing to the other side, are connected in the arc-shaped groove in a sliding mode.

6. A use method of a lithium battery laser welding device for a new energy automobile, which is applied to the lithium battery laser welding device of any one of claims 1 to 5, and comprises the following steps:

s1, firstly, lithium batteries needing to be welded are conveyed to the top of a supporting plate (403) through a transmission belt (12) close to one side of a material storage mechanism (5), the supporting plate (403) is translated to the top of a base (401) through an electronic hydraulic rod (405), and the lithium batteries (13) are stably clamped under the matching of a first spring (404) and a movable limiting plate (402), so that displacement is avoided in the welding process;

s2, then, a motor (7) is started to drive a concave wheel shaft (8) and a driving wheel (9) to synchronously run, when the concave side of the concave wheel shaft (8) rotates to one side of a roller (606), a long rod (605) drives a sliding block (504) to slide to one side close to a second roller (508) under the action of a fourth spring (607), and a convex movable bolt (604) stirs the side of the electrode plate at the bottommost part to slide to a gap between the second roller (508) and a first roller (507);

s3, under the transmission effect of the transmission belt (12), the second roller (508) rotates synchronously, the electrode plates which slide out can be conveyed to the top of the lithium battery (13) in a single-sheet mode under the matching of the first roller (507), the horizontal height of the first roller (507) can be adjusted by rotating two adjusting bolts (505) to adapt to the thicknesses of different electrode plates, the electrode plates completely fall on the top of the lithium battery (13) and are blocked by a blocking frame to avoid sliding out of a set position, so that the conveying of the electrode plates is completed, when one concave side of a concave wheel shaft (8) is separated from being attached to a roller (606), the protruding side of the concave wheel shaft pushes the roller (606) to drive a sliding block (504) to slide and reset in the direction away from the second roller (508), when a movable bolt (604) moves to the position separated from the bottom surface of the next electrode plate at the top, the movable bolt (604) is upwards popped out under the action of a third spring (603), the electrode plate is positioned at the side of the next electrode plate again;

s4, when the movable bolt (604) is reset, under the matching of the end part of one side of the driving wheel (9) and an arc-shaped groove formed in the sliding rod (10), the rack (11) is pushed to transversely translate towards one side of the movable rod (407), the movable rod (407) meshed with the rack rotates along with the rack, under the matching of the sliding groove (409) and the limiting bolt (410), the movable rod (407) drives the pressing block (408) to rotate and press downwards, so that the pressing block is fixed on an electrode plate, welding of the laser welding device (3) is facilitated, after welding is finished, under the pushing of the electronic hydraulic rod (405), the supporting plate (403) drives the welded lithium battery (13) group to reset, under the pushing of a new lithium battery (13), the lithium battery (13) group translates towards the top of the other conveying belt (2), and one-time welding is completed.