CN112247349A

CN112247349A - Battery assembling system

Info

Publication number: CN112247349A
Application number: CN202011044772.7A
Authority: CN
Inventors: 许开华; 宋琦; 龙伟
Original assignee: GEM Wuhan New Energy Vehicle Service Co Ltd
Current assignee: Wuhan Power Battery Regeneration Technology Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-01-22

Abstract

The invention relates to a battery assembly system which comprises a transportation mechanism, a plurality of battery carriers, a carrier grabbing mechanism and a laser welding mechanism, wherein the plurality of battery carriers are used for loading single batteries and are placed on the transportation mechanism for conveying. The carrier grabbing mechanism is arranged on a conveying path of the conveying mechanism to grab the battery carriers on the conveying mechanism one by one, and the battery carriers are transmitted to a station of the laser welding mechanism, so that the plurality of batteries in the battery carriers are welded by the laser welding mechanism, and a whole battery pack is formed. The battery assembling system provided by the invention reduces the labor cost and improves the battery assembling efficiency through an automatic setting mode.

Description

Battery assembling system

Technical Field

The invention relates to the field of battery assembly, in particular to a battery assembly system.

Background

With the increase of various electronic devices, batteries are used more and more widely, each electronic device is provided with a battery according to different products, each device is provided with different batteries according to different types and models, and under some special conditions, the batteries are required to provide larger electric power to drive the devices to work. Therefore, a plurality of small power batteries are generally welded together by using a conductive metal material to form a large power and large capacity battery pack.

In the existing equipment for producing the battery pack, laser welding equipment is generally used, and the anode and the cathode of a single battery are reasonably welded together by using a conductive metal material to form a complete battery pack capable of conveying a power supply. That is, during production, it is necessary to move a plurality of unit cells to a processing station of the laser welding apparatus.

Because a plurality of monocells need to be put well according to the specified position in advance before welding, in the traditional production mode, a plurality of monocells need to be conveyed to a processing station of laser welding equipment every time, and are put according to the specified position by manpower, so that the labor cost is increased, and the efficiency is low.

Disclosure of Invention

In view of the above, the present invention provides a battery assembly system to solve the problem of low efficiency in the conventional battery pack assembly process.

In order to achieve the above object, an aspect of the present invention to solve the above problems is to provide a battery assembling system, including: the device comprises a transportation mechanism, a battery carrier, a carrier grabbing mechanism and a laser welding mechanism, wherein the transportation mechanism comprises a transportation bracket and transportation rollers, roller grooves are formed in the transportation bracket, the number of the transportation rollers is multiple, and the transportation rollers are rotationally connected to the inner walls of the roller grooves; the battery carrier comprises a base, a fixing plate and a grabbing ring, wherein the base comprises a bottom plate, a reference seat, a first connecting plate and a second connecting plate, the bottom plate is positioned on the transportation support and is in contact with the transportation rollers, the reference seat is connected to the bottom plate to place a battery, the first connecting plate and the second connecting plate are positioned on two opposite sides of the reference seat and are in rotating connection with the bottom plate, clamping rings are arranged on the first connecting plate and the second connecting plate, and the clamping rings are respectively positioned on one surfaces, far away from the reference seat, of the first connecting plate and the second connecting plate; the fixing plate is positioned on one side of the reference seat far away from the base, welding holes and buckles are arranged on the fixing plate, the welding holes penetrate through the fixing plate, the buckles are positioned on two sides of the fixing plate, and the clamping ring is clamped with the buckles; the grabbing ring is connected to the bottom plate; the carrier grabbing mechanism comprises a grabbing component, a vertical conveying mechanism, a horizontal conveying mechanism and a grabbing bracket, the grabbing component comprises a base, a first clamping arm, a second clamping arm, a linkage component, a driving component and a connecting frame, the first clamping arm and the second clamping arm are respectively positioned on two opposite sides of the base and are both connected with the base in a sliding mode, and the connecting frame is connected with the vertical conveying mechanism; the linkage assembly comprises a fixed block, a linkage rotating rod, a first connecting rod and a second connecting rod, the linkage fixed block is connected to the base, the linkage rotating rod is rotatably connected with the linkage fixed block, and two ends of the linkage rotating rod are respectively rotatably connected with the first connecting rod and the second connecting rod; one end of the first connecting rod, which is far away from the linkage rotating rod, is rotatably connected with the first clamping arm, one end of the second connecting rod, which is far away from the linkage rotating rod, is rotatably connected with the second clamping arm, and the driving assembly is fixedly connected to the base and drives the first clamping arm or the second clamping arm to slide on the base so as to enable the first clamping arm and the second clamping arm to be close to or far away from each other; the vertical conveying mechanism is connected to the horizontal conveying mechanism, the horizontal conveying mechanism is connected to the grabbing bracket, and one end of the grabbing bracket, which is far away from the horizontal conveying mechanism, is connected with the ground; and the laser welding mechanism is used for welding the battery in the reference seat through the welding hole.

Further, be provided with sliding guide on the base, all be provided with the slider on first arm lock and the second arm lock, the slider with sliding guide sliding fit, in order to realize first arm lock and the second arm lock with the sliding connection of base.

Further, the first clamping arm comprises a first sliding plate and a first clamping plate, the first sliding plate is connected with one end of the first clamping plate, the second clamping arm comprises a second sliding plate and a second clamping plate, and the second sliding plate is connected with one end of the second clamping plate; the sliding block is respectively connected to one surface of the first sliding plate, which is close to the first clamping plate, and one surface of the second sliding plate, which is close to the second clamping plate.

Furthermore, one end, far away from the first sliding plate, of the first clamping plate is provided with a first bending portion and a first clamping roller, and one end, far away from the second sliding plate, of the second clamping plate is provided with a second bending portion and a second clamping roller.

Further, a clamping cylinder is arranged on the first clamping plate and/or the second clamping plate, so that the clamping cylinder and the first bending portion and/or the second bending portion are used for clamping the grabbing ring.

Further, drive assembly includes the connecting block, drives actuating cylinder and transmission piece, the connecting block will drive actuating cylinder connect in on the base, the transmission piece connect in first slide or on the second slide, drive actuating cylinder's push rod with the transmission piece is connected, with pass through it is flexible to drive actuating cylinder's push rod, the drive the transmission piece drives first arm lock or the second arm lock is in slide on the base.

The base comprises a base plate, a first base side plate and a second base side plate, the base plate is connected with the bottom plate, and the first base side plate and the second base side plate are respectively connected to two adjacent sides of the base plate and are positioned on one surface of the base plate, which is far away from the bottom plate; the second connecting plate is located on the first reference side plate, and the first connecting plate is located at one end, far away from the first reference side plate, of the reference plate, so that a placing groove with three-side positioning is formed.

Furthermore, the base further comprises a positioning strip, the positioning strip is detachably connected with the bottom plate and is positioned at one end, away from the second reference side plate, of the reference plate so as to be matched with the first connecting plate, the first reference side plate, the second reference side plate and the second connecting plate, and the placing groove with three positioning sides is surrounded into the placing groove with four positioning sides.

Furthermore, the number of the grabbing rings is two, and the two grabbing rings are respectively connected to the bottom plate and located on two opposite sides of the reference seat.

Furthermore, the first connecting plate and the second connecting plate are the same in shape and size, and the positions of the snap rings on the first connecting plate and the second connecting plate are the same; the fixed plate is provided with an extension block, the extension block is positioned at one end of the fixed plate, and one of the buckles is connected with the fixed plate through the extension block.

Compared with the prior art, the battery assembly system provided by the invention has the following beneficial effects:

through the cooperation of transport mechanism, battery carrier, carrier snatch mechanism and laser welding mechanism, after packing into the battery carrier with the battery, put into transport mechanism and transport in succession to utilize the carrier to snatch the mechanism and snatch the battery carrier on the transport mechanism one by one and to laser welding mechanism's station on, realized the effect of automatic completion battery equipment, alleviate personnel's work load, reduce cost.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the present invention.

Drawings

Fig. 1 is a schematic block diagram of a battery assembly system according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of the transport mechanism of FIG. 1;

FIG. 3 is a schematic structural diagram of the battery carrier of FIG. 1;

FIG. 4 is a schematic structural diagram of the base in FIG. 3;

FIG. 5 is a schematic exploded view of the base of FIG. 3;

fig. 6 is a schematic structural view of the fixing plate in fig. 3;

FIG. 7 is a schematic structural view of the carrier grasping mechanism of FIG. 1;

FIG. 8 is a schematic structural view of the grasping assembly of FIG. 7;

FIG. 9 is an exploded view of the grasping assembly of FIG. 8;

FIG. 10 is a schematic view of the base of FIG. 9;

FIG. 11 is a schematic structural view of the first clamping arm in FIG. 7;

FIG. 12 is an enlarged view of a portion of FIG. 11 at A;

FIG. 13 is a schematic diagram showing the result of the second clamp arm of FIG. 7;

FIG. 14 is an enlarged view of a portion of FIG. 13 at B;

FIG. 15 is a schematic structural view of the linkage assembly of FIG. 7;

FIG. 16 is an exploded view of the drive assembly of FIG. 7;

FIG. 17 is a force-receiving schematic diagram of the linkage assembly of FIG. 7;

description of reference numerals: 1. a battery assembly system; 10. a transport mechanism; 20. a battery carrier; 30. a carrier grabbing mechanism; 40. a laser welding mechanism; 11. transporting the support; 12. transporting rollers; 111. a roller groove; 21. a base; 22. a fixing plate; 23. grabbing a ring; 24. a two-dimensional code display board; 211. a base plate; 212. a reference base; 213. a first connecting plate; 214. a second connecting plate; 215. a snap ring; 216. a positioning bar; 2121. a reference plate; 2122. a first reference side plate; 2123. a second reference side plate; 221. welding the hole; 222. buckling; 223. a lengthening block; 31. a grasping assembly; 32. a vertical transport mechanism; 33. a horizontal transfer mechanism; 34. grabbing the bracket; 311. a base; 312. a first clamp arm; 313. a second clamp arm; 314. a linkage assembly; 315. a drive assembly; 316. a connecting frame; 317. a slider; 318. a clamping cylinder; 3111. a sliding guide rail; 3121. a first slide plate; 3122. a first splint; 3123. a first bending portion; 3124. a first clamping roller; 3131. a second slide plate; 3132. a second splint; 3133. a second bending portion; 3134. a second clamping roller; 3141. a linkage fixing block; 3142. a linkage rotating rod; 3143. a first link; 3144. a second link; 3151. connecting blocks; 3152. a driving cylinder; 3153. and a transmission block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-17, a battery assembly system 1 for assembling individual batteries into a whole battery pack according to the present invention includes a transportation mechanism 10, a plurality of battery carriers 20, a carrier grasping mechanism 30, and a laser welding mechanism 40, wherein the plurality of battery carriers 20 are used for loading the individual batteries and placing the individual batteries on the transportation mechanism 10 for transportation. The carrier grabbing mechanism 30 is disposed on the conveying path of the transportation mechanism 10 to grab the battery carriers 20 on the transportation mechanism 10 one by one and transfer the battery carriers 20 to the station of the laser welding mechanism 40, so that the laser welding mechanism 40 is used to weld the batteries in the battery carriers 20, thereby forming the whole battery pack.

Specifically, the transportation mechanism 10 includes a transportation bracket 11 and a transportation roller 12, a roller groove 111 is formed on the transportation bracket 11, a plurality of transportation rollers 12 are provided, and the transportation rollers 12 are rotatably connected to an inner wall of the roller groove 111.

The battery carrier 20 includes a base 21, a fixing plate 22 and a gripping ring 23, the base 21 includes a bottom plate 211, a reference seat 212, a first connecting plate 213 and a second connecting plate 214, the bottom plate 211 is disposed on the transportation bracket 11, contacts with the transportation roller 12, and can move on the transportation mechanism 10 under the driving of the transportation roller 12. The base 212 is connected to the bottom plate 211 for accommodating a battery, and the first connecting plate 213 and the second connecting plate 214 are disposed at opposite sides of the base 212 and are rotatably connected to the bottom plate 211. The first connecting plate 213 and the second connecting plate 214 are connected with a snap ring 215, and the snap ring 215 is respectively located on one surface of the first connecting plate 213 and the second connecting plate away from the reference seat 212.

It can be understood that the connection mode of the reference seat 212 and the bottom plate 211 may be a fixed connection mode by welding, or may also be a detachable connection mode such as a screw, a stud, a snap connection, and the like.

The fixing plate 22 is located on one side of the reference seat 212 far away from the bottom plate 211, and is provided with a welding hole 221 and a buckle 222, the welding hole 221 penetrates through the fixing plate 22, the buckle 222 is located on two sides of the fixing plate 22, and the snap ring 215 is in clamping connection with the buckle 222, so that the fixing plate 22 is connected with the reference seat 212 by utilizing the clamping connection of the buckle 222 and the snap ring 215, and a battery located in the reference seat 212 is clamped and fixed through the fixing plate 22.

It is to be understood that the welding holes 221 may be provided at any position on the fixing plate 22 as long as the battery can be welded or the like through the welding holes 221. In the present embodiment, the plurality of welding holes 221 are provided on the fixing plate 22 at equal intervals.

It is understood that the first connecting plate 213 and the second connecting plate 214 are pivotally connected to the base plate 211 by hinges.

The grip ring 23 is attached to the base plate 211, and grips the battery carrier 20 by applying a force to the grip ring 23 to transport the battery carrier 20 to a designated station.

The carrier grabbing mechanism 30 includes a grabbing component 31, a vertical conveying mechanism 32, a horizontal conveying mechanism 33 and a grabbing bracket 34, the grabbing component 31 includes a base 311, a first clamping arm 312, a second clamping arm 313, a linkage component 314, a driving component 315 and a connecting frame 316, the first clamping arm 312 and the second clamping arm 313 are respectively located on two opposite sides of the base 311 and are both connected with the base 311 in a sliding manner, the connecting frame 316 connects the connecting base 311 with the vertical conveying mechanism 32, and the vertical conveying mechanism 32 is connected to the horizontal conveying mechanism 33.

The linkage assembly 314 includes a linkage fixing block 3141, a linkage rotating rod 3142, a first link 3143 and a second link 3144, wherein the linkage fixing block 3141 is located between the first clamping arm 312 and the second clamping arm 313, and is connected to the base 311. The linkage rotating rod 3142 is rotatably connected to the linkage fixing block 3141, and both ends thereof are rotatably connected to one end of the first link 3143 and one end of the second link 3144, respectively. One end of the first link 3143, which is far away from the linkage rotary rod 3142, is rotatably connected with the first clamping arm 312, and one end of the second link 3144, which is far away from the linkage rotary rod 3142, is rotatably connected with the second clamping arm 313. The driving assembly 315 is fixedly connected to the base 311, drives the first clamping arm 312 or the second clamping arm 313 to slide on the base 311, and transmits through the linkage assembly 314, thereby realizing that the first clamping arm 312 and the second clamping arm are close to each other or far away from each other.

In this embodiment, the driving assembly 315 drives the second clamping arm 313 to slide on the base 311, and when the driving assembly 315 drives the second clamping arm 313 to slide on the base 311 in a direction approaching the linkage fixing block 3141, the second clamping arm 313 drives the second connecting rod 3144 to move in a direction approaching the linkage rotating rod 3142, so as to drive the linkage rotating rod 3142 to rotate. The rotation of the link rotating rod 3142 drives the first link 3143 to move toward the link rotating rod 3142, and finally the first link 3143 drives the first clamping arm 312 to slide on the base 311 toward the link fixing block 3141, so as to form a movement of the first clamping arm 312 and the second clamping arm 312 approaching each other, so that the first clamping arm 312 and the second clamping arm 313 are matched with each other to clamp the battery carrier 20. Similarly, when the driving component 315 drives the second clamping arm 313 to slide on the base 311 in a direction away from the linkage fixing block 3141, the first clamping arm 312 and the second clamping arm 313 move in a direction away from each other.

It can be understood that the driving assembly 315 can independently drive the second clamping arm 313 to slide, and can also independently drive the first clamping arm 312 to slide, through the transmission of the linkage assembly 314, only one driving assembly 315 needs to drive one of the first clamping arm 312 or the second clamping arm 313, and the driving assembly 315 is omitted, so that the effects of making the structure of the grabbing assembly 31 simpler, reducing the overall size, and saving the cost are achieved.

It is understood that the driving assembly 315 may be a pneumatic cylinder, a hydraulic cylinder, or the like, which can apply force to the first clamping arm 312 or the second clamping arm 313 to slide on the base.

It is understood that, in the present embodiment, the vertical transfer mechanism 32 and the horizontal transfer mechanism 33 are screw modules disposed perpendicular to each other.

The laser welding mechanism 40 welds the battery in the reference holder 212 through the welding hole 221.

It is understood that the laser welding mechanism 40 may be disposed at any position as long as the carrier grasping mechanism 30 can transport the battery carrier to the station of the laser welding mechanism 40.

Further, the reference base 212 includes a reference plate 2121, a first reference side plate 2122 and a second reference side plate 2123, the reference plate 2121 is connected to the bottom plate 211, and the first reference side plate 2122 and the second reference side plate 2123 are respectively connected to two adjacent sides of the reference plate 2121 and located on a surface of the reference plate 2121 away from the bottom plate 211. The second connecting plate 214 is located on the first reference side plate 2122, and the first connecting plate 213 is located at an end of the reference plate 2121 remote from the first reference side plate 2122 to form a placing groove having three-sided positioning.

It can be understood that the battery is placed in the placing groove from the side far from the second reference side plate 2123, and the battery in the placing groove is positioned by the first reference side plate 2122, the second reference side plate 2123, the first connecting plate 213 and the second connecting plate 214, so that the position of the battery in the placing groove is positioned before the fixing plate 22 and the reference plate 2121 clamp the battery, thereby improving the efficiency of preventing the battery.

Further, the base 21 further includes a positioning bar 216, the positioning bar 216 is detachably connected to the bottom plate 211 and is located at an end of the reference plate 2121 away from the second reference side plate 2123 to cooperate with the first connecting plate 213, the first reference side plate 2122, the second reference side plate 2123 and the second connecting plate 214 to enclose the placement slot with three-side positioning into a placement slot with four-side positioning.

In this embodiment, the positioning strip 216 and the bottom plate 211 are detachably connected by a screw, and in some embodiments, the positioning strip 216 and the bottom plate 211 may also be detachably connected by snapping, inserting, or the like.

Further, the first connecting plate 213 and the second connecting plate 214 have the same shape and size, and the positions of the snap ring 215 on the first connecting plate 213 and the second connecting plate 214 are also the same.

Further, the fixing plate 22 is further provided with an extension block 223, the extension block 223 is located at one end of the fixing plate 22, and one of the buckles 222 is connected with the fixing plate 22 through the extension block 223.

It is understood that, in the case that the first connecting plate 213 and the second connecting plate 214 have the same size and the snap ring 215 is located at the same position on the first connecting plate 213 and the second connecting plate 214, since the first connecting plate 213 is directly located on the bottom plate 211 and the second connecting plate 214 is located on the first reference side plate 2122, that is, in the case that the first connecting plate 213 and the second connecting plate 214 have the same size, the distance between the surface of the first connecting plate 213 and the surface of the second connecting plate 214 away from the reference plate 2121 and the reference plate 2121 is different. In order to make the fixing plate 22 parallel to the base plate 211 after the clip 222 is engaged with the clip 215, the extension block 223 is required to connect the clip 222 engaged with the clip 215 of the first connecting plate 213 with the fixing plate 22, so as to offset the distance difference between the reference plate 2121 and the surfaces of the first connecting plate 213 and the second connecting plate 214 away from the reference plate 2121 by the extension block 223, so that the fixing plate 22 is parallel to the base plate 211 after the clip 222 is engaged with the clip 215.

Further, the number of the gripping rings 23 is two, and the two gripping rings 23 are respectively connected to the bottom plate 211 and located at two opposite sides of the reference seat 212.

Further, the line between the two clasps 222/clasps 215 is perpendicular to the line between the two gripping rings 23.

Further, the battery carrier 20 further includes a two-dimensional code display board 24, and the two-dimensional code display board 24 is connected to the bottom board 211 to record each battery carrier 20, that is, to record the battery in each battery carrier 20 by scanning the two-dimensional code.

Further, a sliding guide 3111 is disposed on the base 311, and the first clamping arm 312 and the second clamping arm 313 are both provided with a slider 317, and the slider 317 is in sliding fit with the sliding guide 3111, so as to realize sliding connection between the first clamping arm 312 and the base 311 and the second clamping arm 313.

Further, the first clamping arm 312 includes a first sliding plate 3121 and a first clamping plate 3122, the first sliding plate 3121 is connected to one end of the first clamping plate 3122, the second clamping arm 313 includes a second sliding plate 3131 and a second clamping plate 3132, and the second sliding plate 3131 is connected to one end of the second clamping plate 3132. The sliders 317 are respectively connected to a surface of the first sliding plate 3121 close to the first clamping plate 3122 and a surface of the second sliding plate 3131 close to the second clamping plate 3132, so as to realize the sliding connection between the first sliding plate 3121 and the second sliding plate 3131 and the base 311, that is, the sliding connection between the first clamping arm 312 and the second clamping arm 313 and the base 311.

Further, a first bending portion 3123 is provided at an end of the first clamping plate 3122 far from the first sliding plate 3121, and a first clamping roller 3124 is provided at an end of the first clamping plate 3122 near the first bending portion 3123, a second bending portion 3133 is provided at an end of the second clamping plate 3132 far from the second sliding plate 3131, and a second clamping roller 3134 is provided at an end of the second clamping plate 3132 near the second bending portion 3133. When the first and second clamping

arms

312 and 313 cooperate to clamp the battery carrier 20, two ends of the battery carrier 20 are respectively located between the first bending portion 3123 and the first clamping roller 3124 and between the second bending portion 3133 and the second clamping roller 3134, so as to utilize the first bending portion 3123 and the first clamping roller 3124, and the second bending portion 3133 and the second clamping roller 3134 to respectively clamp two ends of the battery carrier 20, that is, to respectively clamp the two gripping rings 23 of the battery carrier 20, thereby improving the stability of the first and second clamping

arms

312 and 313 cooperating to clamp the battery carrier.

Further, the clamping cylinder 318 is disposed on the first clamping plate 3122 and/or the second clamping plate 3132, so that the push rod of the clamping cylinder 318 cooperates with the first bending portion 3123 and/or the second bending portion 3133 to clamp the carrier, thereby increasing stability when the first clamping arm 312 cooperates with the second clamping arm 313 to clamp the carrier.

It can be understood that, when grabbing the battery carrier 20, the first bending portion 3123 and the first clamping roller 3124 and the second bending portion 3133 and the second clamping roller 3134 respectively clamp the two grabbing rings 23 of the battery carrier 20, and then the push rod of the clamping cylinder 318 cooperates with the first bending portion 3123 and/or the second bending portion 3133 to abut against the grabbing rings 23, so that the grabbing rings are fixed by the pushing force of the clamping cylinder 318, and the battery carrier 20 is prevented from shaking or falling off during grabbing.

Further, the linkage fixing block 3141 is rotatably connected to the center position of the linkage rotating rod 3142, that is, the distance from the linkage fixing block 3141 to the first link 3143 is equal to the distance from the linkage fixing block 3141 to the second link 3144.

Further, the driving assembly 315 includes a connection block 3151, a driving cylinder 3152 and a transmission block 3153, the connection block 3151 connects the driving cylinder 3152 to the base 311, the transmission block 3153 is connected to the first sliding plate 3121 or the second sliding plate 3131, and a push rod of the driving cylinder 3152 is connected to the transmission block 3153, so that when the push rod of the driving cylinder 3152 extends and retracts, the transmission block 3153 drives the first clamping arm 312 or the second clamping arm 313 to slide on the base 311.

The working principle of the invention is as follows: when a plurality of single cells need to be welded to form a battery pack, the single cells are firstly loaded into a plurality of battery carriers 20, then the battery carriers 20 are placed into the transportation mechanism 10 and are sequentially transported to the carrier grabbing mechanism 30, finally the plurality of battery carriers 20 are sequentially grabbed to the station of the laser welding mechanism 40 by the carrier grabbing mechanism 30, and the batteries in the battery carriers 20 are welded from the welding holes 221 by the laser welding mechanism 40.

Claims

1. A battery assembly system, comprising:

the device comprises a transportation mechanism, a battery carrier, a carrier grabbing mechanism and a laser welding mechanism, wherein the transportation mechanism comprises a transportation bracket and transportation rollers, roller grooves are formed in the transportation bracket, the number of the transportation rollers is multiple, and the transportation rollers are rotationally connected to the inner walls of the roller grooves;

the battery carrier comprises a base, a fixing plate and a grabbing ring, wherein the base comprises a bottom plate, a reference seat, a first connecting plate and a second connecting plate, the bottom plate is positioned on the transportation support and is in contact with the transportation rollers, the reference seat is connected to the bottom plate to place a battery, the first connecting plate and the second connecting plate are positioned on two opposite sides of the reference seat and are in rotating connection with the bottom plate, clamping rings are arranged on the first connecting plate and the second connecting plate, and the clamping rings are respectively positioned on one surfaces, far away from the reference seat, of the first connecting plate and the second connecting plate; the fixing plate is positioned on one side of the reference seat far away from the base, welding holes and buckles are arranged on the fixing plate, the welding holes penetrate through the fixing plate, the buckles are positioned on two sides of the fixing plate, and the clamping ring is clamped with the buckles; the grabbing ring is connected to the bottom plate;

the carrier grabbing mechanism comprises a grabbing component, a vertical conveying mechanism, a horizontal conveying mechanism and a grabbing bracket, the grabbing component comprises a base, a first clamping arm, a second clamping arm, a linkage component, a driving component and a connecting frame, the first clamping arm and the second clamping arm are respectively positioned on two opposite sides of the base and are both connected with the base in a sliding mode, and the connecting frame is connected with the vertical conveying mechanism; the linkage assembly comprises a fixed block, a linkage rotating rod, a first connecting rod and a second connecting rod, the linkage fixed block is connected to the base, the linkage rotating rod is rotatably connected with the linkage fixed block, and two ends of the linkage rotating rod are respectively rotatably connected with the first connecting rod and the second connecting rod; one end of the first connecting rod, which is far away from the linkage rotating rod, is rotatably connected with the first clamping arm, one end of the second connecting rod, which is far away from the linkage rotating rod, is rotatably connected with the second clamping arm, and the driving assembly is fixedly connected to the base and drives the first clamping arm or the second clamping arm to slide on the base so as to enable the first clamping arm and the second clamping arm to be close to or far away from each other; the vertical conveying mechanism is connected to the horizontal conveying mechanism, the horizontal conveying mechanism is connected to the grabbing bracket, and one end of the grabbing bracket, which is far away from the horizontal conveying mechanism, is connected with the ground;

and the laser welding mechanism is used for welding the battery in the reference seat through the welding hole.

2. A battery assembly system according to claim 1, wherein:

the base is provided with a sliding guide rail, the first clamping arm and the second clamping arm are provided with sliders, and the sliders are in sliding fit with the sliding guide rail so as to realize sliding connection of the first clamping arm and the second clamping arm with the base.

3. A battery assembly system according to claim 2, wherein:

the first clamping arm comprises a first sliding plate and a first clamping plate, the first sliding plate is connected with one end of the first clamping plate, the second clamping arm comprises a second sliding plate and a second clamping plate, and the second sliding plate is connected with one end of the second clamping plate;

the sliding block is respectively connected to one surface of the first sliding plate, which is close to the first clamping plate, and one surface of the second sliding plate, which is close to the second clamping plate.

4. A battery assembly system according to claim 3, wherein:

the one end that first splint kept away from first slide is provided with first bending portion and first centre gripping cylinder, the one end that the second splint kept away from the second slide is provided with second bending portion and second centre gripping cylinder.

5. A battery assembly system according to claim 4, wherein:

and a clamping cylinder is arranged on the first clamping plate and/or the second clamping plate so as to utilize the clamping cylinder and the first bending part and/or the second bending part to clamp the grabbing ring.

6. A battery assembly system according to claim 3, wherein:

the driving assembly comprises a connecting block, a driving cylinder and a transmission block, the connecting block is used for connecting the driving cylinder to the base, the transmission block is connected to the first sliding plate or the second sliding plate, a push rod of the driving cylinder is connected with the transmission block, the push rod of the driving cylinder stretches and retracts, the transmission block drives the first clamping arm or the second clamping arm to slide on the base.

7. A battery assembly system according to claim 1, wherein:

the reference base comprises a reference plate, a first reference side plate and a second reference side plate, the reference plate is connected with the bottom plate, and the first reference side plate and the second reference side plate are respectively connected to two adjacent sides of the reference plate and are positioned on one surface of the reference plate, which is far away from the bottom plate;

the second connecting plate is located on the first reference side plate, and the first connecting plate is located at one end, far away from the first reference side plate, of the reference plate, so that a placing groove with three-side positioning is formed.

8. A battery assembly system according to claim 7, wherein:

the base further comprises a positioning strip, the positioning strip is detachably connected with the bottom plate and is located at one end, away from the second reference side plate, of the reference plate so as to be matched with the first connecting plate, the first reference side plate, the second reference side plate and the second connecting plate, and the placing groove with three sides positioned is surrounded into the placing groove with four sides positioned.

9. A battery assembly system according to claim 1, wherein:

the two grabbing rings are respectively connected to the bottom plate and located on two opposite sides of the reference seat.

10. A battery assembly system according to claim 1, wherein:

the first connecting plate and the second connecting plate are the same in shape and size, and the positions of the snap rings on the first connecting plate and the second connecting plate are the same;

the fixed plate is provided with an extension block, the extension block is positioned at one end of the fixed plate, and one of the buckles is connected with the fixed plate through the extension block.