CN113618217B

CN113618217B - Spot welding device for manufacturing lithium battery

Info

Publication number: CN113618217B
Application number: CN202111022899.3A
Authority: CN
Inventors: 吴凡; 余宜虎; 刘晓乔
Original assignee: Anhui Liya Battery Co ltd
Current assignee: Anhui Liya Battery Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-10-21
Anticipated expiration: 2041-09-01
Also published as: CN113618217A

Abstract

The invention discloses a spot welding device for manufacturing a lithium battery, which comprises: the bearing plate is arranged on the base in a sliding mode in the length direction of the lithium battery module, and the base is arranged to bear the lithium battery module to move in the width direction of the lithium battery module; the walking mechanism comprises toothed rails symmetrically distributed on two sides of the bearing plate and gears meshed with the bottoms of the toothed rails, the walking mechanism is connected with the bearing plate through a connecting rod, the top surfaces of the toothed rails and the bearing plate are at the same height, the gears are rotatably supported on the base, and one opposite side surfaces of the two toothed rails are respectively shielded from notches on the side of the tooth sockets through sealing plates; and the clamping mechanism comprises side baffles arranged on the outer sides of the top surfaces of the two toothed rails and a push-pull assembly arranged on the bearing plate and capable of being adjusted in the length direction, and two ends of the connecting rod are respectively connected to the push-pull assembly and the sealing plate in a rotating manner. The spot welding device for manufacturing the lithium battery has the advantages of high efficiency and high precision of aligning the lithium battery electrode with the welding head and high spot welding efficiency of the lithium battery.

Description

Spot welding device for manufacturing lithium battery

Technical Field

The invention relates to the technical field of new energy, in particular to a spot welding device for manufacturing a lithium battery.

Background

With the continuous attention on energy conservation and environmental protection, the new energy technology rapidly rises, a series of new energy products such as electric automobiles and electric bicycles are integrated into various fields of life of people, and because the environmental protection property, the economy, the repeatability and the sustainability of the new energy products are widely welcomed by people, the lithium battery is taken as one of the power energy of the new energy products, and the amount of the lithium battery in the new energy products is particularly prominent.

At present, in a conventional lithium battery manufacturing production flow, in a combined assembly process of a lithium battery module, nickel blocks are used for welding lithium batteries in the lithium battery module, and then the lithium batteries in the lithium battery module are electrically connected into a required form;

in actual implementation, usually, a form of one person and one machine (spot welder) is adopted, a worker places a lithium battery module on a table board of the spot welder, aligns electrodes of a lithium battery to be welded with nickel blocks to welding heads of the spot welder, then places the nickel blocks on the electrodes of the lithium battery, and then steps on pedals of the spot welder, the welding heads descend and weld the nickel blocks with the electrodes of the lithium battery, and as the number of the lithium batteries in the lithium battery module is large, the electrodes of each lithium battery need to be welded with the nickel blocks at corresponding positions, so that a conductive circuit between the lithium batteries is ensured to be a passage;

consequently, the manual work need remove the position of lithium cell module on the mesa again after every lithium cell that welds, with next needs with the electrode alignment bonding tool of nickel piece welded lithium cell, weld again, operation process is very numerous and diverse, the efficiency is extremely low, especially, operating efficiency relies on workman's proficiency completely, and simultaneously, the lithium cell electrode also relies on manual observation completely with the alignment of bonding tool, the randomness is stronger, be difficult to effective control, in case misoperation, can lead to welding failure, the bonding tool can damage the electrode of lithium cell, cause the unable quality control of product, need carry out the rework.

Therefore, in order to improve the manufacturing efficiency of the lithium battery and reduce the production and manufacturing cost and the defective rate, the invention provides a spot welding device for manufacturing the lithium battery.

Disclosure of Invention

The invention aims to provide a spot welding device for manufacturing a lithium battery, which aims to solve the problem of abrasion caused by direct movement of a lithium battery module on the table surface of a spot welding machine by manual pushing by using a bearing plate to support the lithium battery module and move below a welding head, and also more importantly, the spot welding device improves the working efficiency and reduces the labor cost and the defective rate.

In order to achieve the purpose, the invention adopts the main technical scheme that:

a spot welding device for manufacturing lithium batteries comprises:

the bearing plate is arranged on the base in a sliding mode in the length direction of the lithium battery module and used for bearing the lithium battery module, and the base is arranged to bear the lithium battery module to move in the width direction of the lithium battery module;

the walking mechanism comprises toothed rails symmetrically distributed on two sides of the bearing plate and gears meshed with the bottoms of the toothed rails, the walking mechanism is connected with the bearing plate through a connecting rod, the top surfaces of the toothed rails and the bearing plate are at the same height, the gears are rotatably supported on the base, and one opposite side surfaces of the two toothed rails are respectively shielded from notches on the side of the tooth sockets through sealing plates;

the clamping mechanism comprises side baffles arranged on the outer sides of the top surfaces of the two toothed rails and a push-pull assembly which is arranged on the bearing plate and can be adjusted in the length direction of the bearing plate, and two ends of the connecting rod are respectively and rotatably connected to the push-pull assembly and the sealing plate;

the push-pull assembly comprises a push-pull channel, a push-pull connecting block and a push-pull screw rod, the push-pull channel is arranged on the bearing plate, the two sides of the bearing plate corresponding to the push-pull channel in the width direction are penetrated through, the push-pull connecting block is arranged in the push-pull channel in a sliding mode, the push-pull screw rod is parallel to the push-pull channel and is connected to the bearing plate in a threaded mode, one end of the push-pull screw rod extends into the push-pull channel to be matched with the push-pull connecting block in a rotating mode, the other end of the push-pull screw rod extends to the outer side of the bearing plate, and one end of the connecting rod is connected to the side face of the push-pull connecting block in a rotating mode.

Preferably, the push-pull channel and the push-pull connecting block are arranged in two in the length direction of the bearing plate, and the opposite ends of the two push-pull connecting blocks are connected through a push-pull synchronizing rod.

Preferably, the bearing plate comprises a first rail plate arranged on the bottom of the bearing plate in an I shape, a first slide rail matched with the bottom of the first rail plate is arranged on the base, the first rail plate is inserted into the first slide rail through the bottom of the first rail plate and is in sliding fit with the first slide rail, and the push-pull assembly is arranged on the first rail plate.

Preferably, the gears are arranged on two sides of the bearing plate respectively and are located at two ends of the rack respectively, two gears located at one end of the rack are connected through a walking rotating shaft, and a pair of gears located at the same side of the bearing plate are connected through a belt pulley assembly.

Preferably, one end of the walking rotating shaft is connected with a driving mechanism, the driving mechanism comprises a driving rod and a ratchet wheel assembly arranged on the driving rod, and the ratchet wheel assembly is fixed in the circumferential direction relative to the walking rotating shaft and the driving rod.

Preferably, the ratchet assembly comprises two coaxial and reversely arranged ratchet sets, the two ratchet sets are relatively fixed, and the axial displacement assembly is arranged on the walking rotating shaft to drive the two ratchet sets to axially displace on the walking rotating shaft, so that one ratchet set is always fixed with the walking rotating shaft in the circumferential direction.

Preferably, the base is equipped with spacing subassembly including the second track board that is located its bottom surface both sides and sliding fit at the second slide rail of second track board bottom between second slide rail and the second track board for to the second track board of different positions on the second slide rail fix a position.

The invention has at least the following beneficial effects:

according to the lithium battery module welding machine, the lithium battery module to be welded with the nickel strap is placed on the bearing plate, the bearing plate and the base are used for carrying the lithium battery module to move under the welding head of the spot welding machine, and the lithium battery electrode is aligned with the welding head.

According to the invention, the ratchet wheel assembly is arranged to be matched with the driving rod, so that the lithium battery module can move back and forth in the length direction under the action of the travelling mechanism, continuous operation of two rows of lithium batteries and a nickel block during welding is realized, the working efficiency is greatly improved, the labor cost is reduced, particularly, after the rotation amplitude of the driving rod is limited each time, the rotation amplitude is matched with the center distance between adjacent lithium batteries, the distance movement of the lithium batteries is realized, and after each movement, the electrode of the next lithium battery is directly aligned with the welding head, so that the working efficiency and the yield are further improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is an overall schematic view of a spot welding device for manufacturing a lithium battery according to the present invention.

Fig. 2 is a schematic diagram of a bearing plate of the spot welding device for manufacturing a lithium battery of the present invention, which is positioned on the left side of a base.

Fig. 3 is a schematic diagram of the spot welding device for manufacturing lithium batteries according to the present invention, wherein the bearing plate is positioned on the right side of the base.

Fig. 4 is a schematic view of a base of the spot welding apparatus for manufacturing a lithium battery according to the present invention.

Fig. 5 is an enlarged view of a spot welding device for manufacturing a lithium battery according to the present invention at a position a in fig. 4.

Fig. 6 is a schematic view of a bearing plate of the spot welding device for manufacturing lithium batteries according to the present invention.

Fig. 7 is a schematic view of a push-pull assembly of the spot welding device for manufacturing lithium batteries according to the present invention.

Fig. 8 is a schematic view of a push-pull connecting block of the spot welding device for manufacturing the lithium battery of the present invention.

Fig. 9 is a schematic view of a driving rod of the spot welding apparatus for manufacturing a lithium battery according to the present invention.

Fig. 10 is a schematic view of a ratchet assembly of the spot welding device for manufacturing lithium batteries according to the present invention.

Fig. 11 is a schematic view of an axial displacement assembly of a spot welding apparatus for manufacturing a lithium battery according to the present invention.

Fig. 12 is a disassembled schematic view of a ratchet assembly of the spot welding device for manufacturing lithium batteries according to the present invention.

Fig. 13 is a schematic view of a pawl structure of a spot welding device for manufacturing a lithium battery according to the present invention.

In the figure:

1. a base; 11. a second track plate; 12. a second slide rail; 13. a limiting component; 131. a limiting groove; 132. a limiting block; 133. a stop lever;

2. a carrier plate; 21. a first track plate; 22. a first slide rail;

3. a traveling mechanism; 31. a rack; 32. a gear; 321. a gear seat; 33. a pulley assembly; 34. a traveling rotating shaft;

4. a clamping mechanism; 41. a side dam; 42. a push-pull assembly; 421. a push-pull channel; 422. pushing and pulling the connecting block; 423. pushing and pulling the screw; 424. a push-pull wheel; 425. a wheel groove; 426. fastening a nut; 427. pushing and pulling the synchronous rod;

5. a connecting rod;

6. closing the plate;

7. a drive mechanism; 71. a drive rod; 711. a loop portion; 712. a lever body portion; 72. a ratchet assembly; 721. ratchet group 7211, ratchet; 7212. a pawl; 7213. a check spring; 7214. a ratchet sleeve; 7215. a ratchet wheel connecting part; 73. an axial displacement assembly; 731. a shaft cavity; 732. a slider; 733. an axial screw; 734. a through groove; 735. an axial connecting block; 736. a transmission limiting block; 737. a transmission limiting groove; 8. a limiting ring; 81. and (4) a notch.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Referring to fig. 1 to 13, the invention provides a spot welding device for manufacturing lithium batteries, which comprises a base 1, a bearing plate 2, a traveling mechanism 3 and a clamping mechanism 4, wherein the bearing plate 2 is arranged on the base 1 in a sliding manner in the length direction of a lithium battery module and is used for bearing the lithium battery module, and the base 1 is matched to be arranged to be capable of bearing the lithium battery module to move in the width direction of the lithium battery module, so that when a spot welder is used for connecting a nickel strap with a lithium battery electrode, the lithium battery module can be moved by directly using the movement of the base 1 and the bearing plate 2, electrodes of different lithium batteries can be conveniently aligned with a welding head of the spot welder, and compared with the prior art, the scheme can directly avoid the abrasion caused by the friction of the lithium battery module on a table top due to the direct hand pushing of the lithium battery module to move on the table top;

as shown in fig. 1 to 3, wherein the running mechanism 3 is used for carrying the lithium battery module to move in the length direction thereof, and includes rack rails 31 symmetrically distributed on two sides of the bearing plate 2 and gears 32 meshed with the bottoms of the rack rails 31, the running mechanism 3 is connected to the bearing plate 2 through a connecting rod 5, the connecting rod 5 connects the running mechanism 3 and the bearing plate 2 into a whole, when the gears 32 rotate, the rack rails 31 can be driven to move, and the rack rails 31 enable the bearing plate 2 to move synchronously through the connecting rod 5, so as to drive the lithium battery module to move in the length direction thereof, the top surfaces of the rack rails 31 and the top surface of the bearing plate 2 are at the same height, so as to cooperate with the bearing plate 2 to simultaneously support the lithium battery module, the gears 32 are rotatably supported on the base 1, one gear seat 321 is provided corresponding to each gear 32, the gear 32 is rotatably mounted on the gear seat 321, the gear seat 321 is fixed on the base 1, and one opposite side surface of the two rack rails 31 both shields the notch of the side of the rack rail 31 through the seal plate 6, so as to limit the rack rails 31;

as shown in fig. 2 and 3, the clamping mechanism 4 mainly functions to clamp and fix the lithium battery module placed on the bearing plate 2 and prevent the lithium battery module from moving relative to the bearing plate 2, and includes two side guards 41 disposed outside the top surfaces of the two racks 31, the two side guards 41 respectively limit and clamp two sides of the lithium battery module in the width direction, and a push-pull assembly 42 disposed on the bearing plate 2 and adjustable in the position in the length direction, and two ends of the connecting rod 5 are respectively connected to the push-pull assembly 42 and the sealing plate 6 in a rotatable manner, and the push-pull assembly 42 is moved on the bearing plate 2 to pull one end of the connecting rod 5, so that the included angle between the two connecting rods 5 is reduced, at this time, the other ends of the two connecting rods 5 pull the two racks 31 to move relatively, two racks 31 drive two side guards 41 to move relatively, at this moment, two side guards 41 can be from both sides centre gripping lithium battery module, utilize this mode, cooperation rack 31 is uncovered form for the one end of shrouding 6, make when loading board 2 is idle, usable push-and-pull subassembly 42 makes two racks 31 relative motion, make rack 31 can separate with gear 32, after rack 31 leaves gear 32, can directly move loading board 2 on base 1, at this moment, loading board 2 can quick travel, this mode is mainly applied to after the processing of a lithium battery module is accomplished, before reprocessing next lithium battery module, make loading board 2 can reset fast, and simultaneously, utilize push-and-pull subassembly 42 to change the distance between two racks 31, make applicable to the lithium battery module of different width, improve the suitability.

As shown in fig. 6 to 8, the push-pull assembly 42 includes a push-pull channel 421, a push-pull connection block 422 and a push-pull screw 423, the push-pull channel 421 is opened on the bearing plate 2, the two sides of the bearing plate 2 corresponding to the push-pull channel 421 are penetrated in the width direction, the push-pull connection block 422 is slidably disposed in the push-pull channel 421, the push-pull screw 423 is parallel to the push-pull channel 421 and is threadedly connected to the bearing plate 2, one end of the push-pull screw 423 extends into the push-pull channel 421 to be rotationally matched with the push-pull connection block 422, and the other end extends to the outside of the bearing plate 2, the push-pull connection block 422 is driven to move by rotating the push-pull screw 423, and simultaneously, the push-pull screw 423 and the bearing plate 2 are threadedly engaged to each other, and then the push-pull connection block 422 is fixed at different positions in the push-pull channel 421 in real time by stopping rotating the push-pull screw 423, and meanwhile, the push-pull screw 423 is provided with a fastening nut 426, which is threadedly engaged with the push-pull screw 423, and the push-pull connection block 423 is further connected to the side face of the bearing plate 2, thereby improving the stability of the push-pull connection block 422.

Two push-pull channels 421 and two push-pull connecting blocks 422 are arranged in the length direction of the bearing plate 2, the opposite ends of the two push-pull connecting blocks 422 are connected through push-pull synchronizing rods 427, at this time, two groups of connecting rods 5 are arranged, and the two groups of connecting rods are distributed on the two sides of the bearing plate 2 in the length direction of the bearing plate 2, so that when the push-pull screw 423 is operated, the two groups of connecting rods 5 synchronously act by using the action of the push-pull synchronizing rods 427, and the two groups of push-pull connecting rods 5 respectively apply acting forces from the two ends in the length direction of the rack 31, so that when the two racks 31 move in the width direction of the lithium battery module, the two sides of the top and the bottom of the push-pull connecting block 422 are respectively contacted with the corresponding sides of the inner wall of the top and the bottom of the push-pull channel 421 to prevent the push-pull connecting block 422 from rotating, wherein the push-pull connecting block 422 has a cavity in which the push-pull wheels 424 are rotatably installed, and wheel grooves 425 are arranged on the top and the inner walls and the bottom of the push-pull channel 421, so that the edges of the push-pull wheel 424 are slidably matched in the wheel grooves 425, and the push-pull connecting block 424, and at the push-pull wheel grooves 425, and at the same time, the push-pull wheel 424 support the push-pull connecting block 422 to move when the push-pull wheel 422 rolls in the wheel grooves 425;

as shown in fig. 1, 2 and 6, the carrier plate 2 includes a first rail plate 21 disposed at the bottom thereof in an i shape, the base 1 is provided with a first slide rail 22 adapted to the bottom of the first rail plate 21, the first rail plate 21 is inserted into the first slide rail 22 through the bottom thereof and is slidably engaged with the first slide rail 22, in this embodiment, the length of the carrier plate 2, the rack 31 and the base 1 is the same, the first rail plate 21 can extend out from the first slide rail 22, so that the carrier plate 2 and the rack 31 can extend out from the base 1 in the length direction relative to the base 1, after the carrier plate 2 and the rack 31 extend out from the base 1, the first rail plate 21 is engaged with the first slide rail 22 to support the carrier plate 2 and the rack 31 by the base 1, the push-pull assembly 42 is disposed on the first rail plate 21 to maintain the flatness of the top surface of the carrier plate 2, and, meanwhile, in the implementation process, the first rail plate 21 and the carrier plate 2 can be detachably connected by bolts;

as shown in fig. 4, a pair of gears 32 is disposed on both sides of the carrier plate 2 and respectively located at both ends of the rack 31, on one hand, the gears 32 support both ends of the carrier plate 2, on the other hand, after one end of the rack 31 is separated from one gear 32, the other end of the rack 31 is meshed with the other gear 32 and can be driven by the other gear 32, and the two gears 32 located at one end of the rack 31 are connected by a walking rotating shaft 34 and connected by a belt pulley assembly 33, the two gears 32 located at one end of the carrier plate 2 in the length direction are connected and synchronized by the walking rotating shaft 34, and then the belt pulley assembly 33 is used to connect and synchronize the two gears 32 located at the same side of the carrier plate 2 in the width direction, thereby, the four gears 32 can be connected and synchronized in a transmission manner, so that any one of the gears 32 rotates, the other three gears 32 rotate simultaneously, when the carrier plate 2 and the rack 31 are in an extended state relative to the base 1, the two gears 32 on one side in the length direction are meshed with the rack 31, and the two gears 32 are meshed with the rack 31, so that the two gears 31 can be directly and the rack 31 can be conveniently moved between the two racks 31, and the two racks 31 can be directly meshed with the two gears 31;

as shown in fig. 9 and 10, one end of the walking rotary shaft 34 is connected with the driving mechanism 7, the driving mechanism 7 includes a driving rod 71 and a ratchet assembly 72 disposed on the driving rod 71, the driving rod 71 is rotatably mounted on the surface of the base 1, the ratchet assembly 72 is fixed in the circumferential direction relative to the walking rotary shaft 34 and the driving rod 71, the ratchet assembly 72 is rotated by operating the driving rod 71, and thus the rotation of the walking rotary shaft 34 by the ratchet assembly 72 can be realized, and further, the walking rotary shaft 34 is used for driving the walking mechanism 3 to move, so that the lithium battery module moves;

in combination with the above scheme, in the operation process, the push-pull connection block 422 moves in the push-pull channel 421 through the push-pull screw 423 in the push-pull assembly 42, and further drives the connection rod 5 to move, so that the two racks 31 move toward the base 1 and are separated from the gear 32, then the bearing plate 2 is directly moved, the first rail plate 21 slides outward on the first slide rail 22, so that the bearing plate 2 and the racks 31 extend out from the base 1, then the push-pull assembly 42 is used to restore the racks 31, so that the racks 31 are engaged with the gear 32 again, and then the lithium battery module is placed on the bearing plate 2 and the racks 31, at this time, the two side baffles 41 can be used to clamp and fix the lithium battery module by using the push-pull assembly 42, then the driving rod 71 is directly operated, the ratchet assembly 72 and the traveling rotating shaft 34 are used to drive the traveling mechanism 3, so that the bearing plate 2 moves along with the traveling mechanism 3 in the length direction, then the lithium battery module moves, so that the electrodes of a plurality of lithium batteries in the length direction in the lithium battery module sequentially pass through the welding head of the spot welding machine, when the electrodes enter the position under the welding head, nickel blocks are placed on the electrodes of the lithium batteries, then the pedals of the spot welding machine are stepped by feet to weld the nickel blocks on the electrodes of the lithium batteries, then the driving rod 71 is operated to enable the electrode of the next lithium battery to be welded on the welding head of the spot welding machine, after one row of lithium battery electrodes in the length direction corresponding to the lithium battery module is welded with the respective corresponding nickel blocks, the base 1 is directly enabled to carry the bearing plate 2 and the travelling mechanism 3 to act in the width direction, the first electrode in the next row of lithium batteries is enabled to be aligned with the welding head of the spot welding machine, then the driving mechanism 7 is operated to enable the lithium battery module to move to enable the lithium batteries in the row to pass through the welding head one by one and be welded, with this, can realize arranging with the nickel piece welding to the lithium cell in the lithium cell module, this scheme compares in prior art, need not artifical hand push lithium cell module on the one hand and moves on the mesa, and on the other hand, lithium cell module can remove respectively at its length direction and width direction to in the accuracy of control its removal, convenient and bonding tool alignment.

As shown in fig. 11 to fig. 13, the ratchet assembly 72 includes two coaxial and oppositely disposed ratchet sets 721, the two ratchet sets 721 are respectively used for controlling the lithium battery module to move in two opposite directions, the two ratchet sets 721 drive the two ratchet sets 721 to axially move on the walking shaft 34 by disposing the axial displacement assembly 73 on the walking shaft 34, so that one ratchet set 721 is always fixed relative to the walking shaft 34 and the driving rod 71 in the circumferential direction, the axial displacement assembly 73 can be used to switch different ratchet sets 721 to be fixed relative to the walking shaft 34 and the driving rod 71 in the circumferential direction, and when the driving rod 71 is operated, the moving direction of the walking mechanism 3 can be adjusted, so as to control the moving direction of the lithium battery module under the welding head;

the ratchet set 721 comprises a ratchet 7211, a pawl 7212, a check spring 7213 and a ratchet sleeve 7214, wherein the ratchet 7211 is axially slidably sleeved on the traveling rotating shaft 34, the ratchet 7211 is arranged in the ratchet sleeve 7214, the outer surface of the ratchet sleeve 7214 is axially and slidably matched with the inner wall of the driving rod 71, the pawl 7212 is radially and telescopically arranged in the ratchet sleeve 7214, one end of the pawl 7212 extends out and is matched with one tooth space of the ratchet 7211, the check spring 7213 is arranged between the ratchet sleeve 7214 and the pawl 7212, the pawl 7212 extends out from the ratchet sleeve 7214 through the elasticity of the check spring 7213, one side surface of the pawl 7212 in the circumferential direction of the ratchet 7211 is a plane, the other side surface is an arc surface, the ratchets on the ratchet 7211 on the two side surfaces in the circumferential direction of the ratchet 7211 are respectively a plane and an arc surface, when the ratchet sleeve 7212 is rotated, the plane of the pawl 7212 is driven to make a circular motion, the plane is contacted with the plane of the plane, the pawls 7212 can drive the ratchet 7211 to rotate, and further drive the traveling spindle 34 to rotate through the ratchet 7211, so as to realize the action of the driving mechanism 7, when the ratchet sleeve 7214 rotates reversely, the cambered surfaces of the pawls 7212 contact with the cambered surfaces of the ratchets on the ratchet 7211, at this time, by utilizing the guiding action between the cambered surfaces, the pawls 7212 move along the radial direction of the ratchet sleeve 7214, compress the check springs 7213 and are accommodated in the ratchet sleeve 7214, so as to sequentially cross over the ratchets, so that the pawls 7212 make a return stroke, and in the process, the ratchet 7211 is kept fixed, so as to realize the one-way driving function of the traveling spindle 34 by the ratchet set 721, the ratchet 7211 and the ratchet sleeve 7214 in the ratchet set 721 are rotationally connected through the ratchet connecting portion 7215, specifically, the ratchet connecting portion 7215 comprises annular sliding grooves which are arranged on the surfaces of the ratchet 7211 and the ratchet sleeve 7214, a sliding ring is slidably matched with a sliding ring, two sliding rings are connected and fixed through a connecting plate, two ratchet wheel connecting parts 7215 which are opposite to each other on the two ratchet wheel sets 721 are fixedly connected to realize the connection between the two ratchet wheel sets 721, and the ratchet wheel connecting parts 7215 are arranged in such a way that when one ratchet wheel sleeve 7214 or one ratchet wheel 7211 rotates, the other ratchet wheel set 721 is not influenced, the two ratchet wheel sets 721 can respectively and independently rotate, and further the two ratchet wheel sets 721 are matched to finish the reverse rotation between the two ratchet wheel sets 721;

the axial displacement component 73 comprises a shaft cavity 731 arranged at one end of the walking rotating shaft 34, the end surface of the shaft cavity 731 is hexagonal, a sliding body 732 capable of sliding along the axial direction is arranged in the shaft cavity 731, the shape of the sliding body 732 is matched with the shaft cavity 731, an axial screw 733 is connected in the sliding body 732 in a threaded manner, one end of the axial screw 733 is rotatably connected with the inner wall of one end of the shaft cavity 731, the other end of the axial screw 733 extends out of the walking rotating shaft 34 from the shaft cavity 731, through grooves 734 distributed along the axial direction are arranged on the surface of the walking rotating shaft 34, axial connecting blocks 735 are arranged in the through grooves 734 in a sliding manner, the inner ring surfaces of two ratchets 7211 are simultaneously fixed on the axial connecting blocks 735, the inner surface of the axial connecting blocks 735 extends into the shaft cavity 731 from the through grooves 734 and is fixed on the sliding body 732, when the axial screw 733 is rotated, the sliding body 732 moves in the shaft cavity 731, at this time, the sliding body 732 drives the two ratchet sets 721 to axially translate on the traveling rotating shaft 34 through the axial connecting block 735, the outer surfaces of the ratchet sleeves 7214 are respectively provided with a transmission limiting block 736, the inner surface of the driving rod 71 is axially provided with a transmission limiting groove 737, the two ratchet sets 721 axially translate on the traveling rotating shaft 34 so that the two transmission limiting blocks 736 are respectively matched with the transmission limiting grooves 737, the two ratchet sets 721 are respectively matched with the driving rod 71 in a transmission manner, the ratchet sets 721 matched with the driving rod 71 in a transmission manner can be switched by rotating the axial screw 733, the two ratchet sets 721 are arranged in a reverse manner, the driving direction of the driving mechanism 7 can be adjusted, so as to control the movement of the lithium battery module in the length direction, wherein the driving rod 71 comprises a ring sleeve portion 711 and a rod body portion 712, the rod portion 712 is fixed on the surface of the ring sleeve portion 711 is rotatably mounted on the base 1, and the transmission limiting groove 737 is arranged on the inner surface of the ring sleeve portion 711, the ratchet wheel set 721 is arranged in the inner ring of the ring sleeve 711, meanwhile, the outer side of the base 1 and the ring sleeve 711 are coaxially provided with the limiting ring 8, the limiting ring 8 is fixed on the surface of the base 1, the ring sleeve 711 is positioned in the inner cavity of the limiting ring 8, the limiting ring 8 is provided with a notch 81 for providing a space for the swing of the rod part 712, and two ends of the notch 81 can be used for limiting the swing amplitude of the rod part 712 so as to realize the fixed-amplitude swing of the driving rod 71, thereby realizing the fixed-amplitude displacement of the lithium battery module carried by the driving mechanism 7, at the moment, the moving distance of the lithium battery module at each time and the distance between the electrodes of two adjacent lithium batteries in the lithium battery module are set to be in a matched state, and further, when each operation is performed by using the driving rod 71, the lithium battery module moves once in the length direction, and the lithium battery electrodes in the lithium battery module are always kept in a state aligned with the welding head, the lithium battery module is moved by manual hand pushing, the welding head is aligned with the electrode of the lithium battery by human eyes observation when the lithium battery module is moved each time, the scheme has the function of automatically aligning the lithium battery with the welding head, and the driving mechanism 7 is matched to automatically drive the lithium battery module to move in the length direction, so that the working efficiency can be greatly improved, the lithium battery damage caused by spot welding when the welding head is dislocated with the electrode of the lithium battery or the situation of repeated re-spot welding is prevented, the welding efficiency and the yield are improved, the defective rate is reduced, after the driving mechanism 7 can drive the lithium battery module to carry out two processes of reverse movement in the length direction, when the lithium battery module is subjected to spot welding, after the electrodes of one row of lithium batteries are welded with nickel blocks, the lithium battery module does not need to be integrally moved to the initial position again for re-spot welding, and only needs to directly move the base 1 in the width direction, the bonding tool aligns with the first lithium battery electrode of the next row of lithium batteries, and then the lithium battery electrode and the nickel block in the lithium battery module can be welded at a fixed distance by the reverse movement of the driving mechanism 7 in the length direction of the lithium battery module.

As shown in fig. 4 and fig. 5, the base 1 includes second track plates 11 located at two sides of a bottom surface of the base and second slide rails 12 slidably fitted at bottoms of the second track plates 11, a limiting component 13 is disposed between the second slide rails 12 and the second track plates 11, and is used for positioning the second track plates 11 at different positions on the second slide rails 12, specifically, the limiting component 13 includes limiting grooves 131 disposed on an upper surface of the second slide rails 12 and distributed at equal intervals, a distance between two adjacent limiting grooves 131 is adapted to a distance between two adjacent lithium battery electrodes, and limiting blocks 132 disposed on the second slide rails 12 and capable of being inserted into the corresponding limiting grooves 131, the limiting blocks 132 are longitudinally slidably disposed on the base 1, the limiting components 13 are disposed at two ends of the base 1 in a length direction, when the base is manually operated, the limiting components 13 face a human body, a side of the base 1 far from the human body is provided with a blocking rod 133, and in an initial state, the blocking rod 133 cooperates with the limiting blocks 132 to respectively contact with two sides of the second track plates 12 in a width direction, so as to limit the lithium battery module.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to achieve the technical effect basically.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrases "comprising one of 8230 \8230;" does not exclude the presence of additional like elements in an article or system comprising the element.

The foregoing description shows and describes several preferred embodiments of the invention, but as before, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A spot welding device for manufacturing a lithium battery is characterized by comprising:

the walking mechanism comprises toothed rails symmetrically distributed on two sides of the bearing plate and gears meshed with the bottoms of the toothed rails, the walking mechanism is connected with the bearing plate through a connecting rod, the top surfaces of the toothed rails and the bearing plate are at the same height, the gears are rotatably supported on the base, and one side surface, opposite to the two toothed rails, of each toothed rail covers a notch on the side of the tooth socket through a sealing plate;

the push-pull assembly comprises a push-pull channel, a push-pull connecting block and a push-pull screw rod, the push-pull channel is arranged on the bearing plate, two sides of the bearing plate corresponding to the push-pull channel in the width direction are penetrated through, the push-pull connecting block is arranged in the push-pull channel in a sliding mode, the push-pull screw rod is parallel to the push-pull channel and is connected to the bearing plate in a threaded mode, one end of the push-pull screw rod extends into the push-pull channel to be matched with the push-pull connecting block in a rotating mode, the other end of the push-pull screw rod extends to the outer side of the bearing plate, and one end of the connecting rod is connected to the side face of the push-pull connecting block in a rotating mode.

2. The spot welding device for manufacturing lithium battery as claimed in claim 1, wherein: the two push-pull channels and the two push-pull connecting blocks are arranged in the length direction of the bearing plate, and the opposite ends of the two push-pull connecting blocks are connected through the push-pull synchronizing rod.

3. The spot welding device for manufacturing lithium battery as claimed in claim 2, wherein: the bearing plate comprises a first rail plate arranged on the bottom of the bearing plate in an I shape, a first sliding rail matched with the bottom of the first rail plate is arranged on the base, the first rail plate is inserted into the first sliding rail through the bottom of the first rail plate and is in sliding fit with the first sliding rail, and the push-pull assembly is arranged on the first rail plate.

4. The spot welding device for lithium battery manufacturing according to claim 1, wherein: the gear is provided with a pair of gears on two sides of the bearing plate and is respectively positioned at two ends of the rack, the two gears positioned at one end of the rack are connected through a walking rotating shaft, and the pair of gears positioned at the same side of the bearing plate are connected through a belt pulley component.

5. The spot welding device for lithium battery manufacturing according to claim 4, wherein: one end of the walking rotating shaft is connected with a driving mechanism, the driving mechanism comprises a driving rod and a ratchet wheel assembly arranged on the driving rod, and the ratchet wheel assembly is fixed in the circumferential direction relative to the walking rotating shaft and the driving rod.

6. The spot welding device for lithium battery manufacturing according to claim 5, wherein: the ratchet wheel assembly comprises two coaxial and reversely arranged ratchet wheel sets, the two ratchet wheel sets are fixed relatively, and the axial displacement assembly is arranged on the walking rotating shaft to drive the two ratchet wheel sets to axially displace on the walking rotating shaft, so that one ratchet wheel set is always fixed with the walking rotating shaft in the circumferential direction.

7. A spot welding apparatus for lithium battery manufacturing according to any one of claims 1 to 6, wherein: the base comprises second track plates located on two sides of the bottom surface of the base and a second sliding rail in sliding fit with the bottom of the second track plates, and a limiting component is arranged between the second sliding rail and the second track plates and used for positioning the second track plates at different positions on the second sliding rail.