Automatic batch roll welding machine for full-tab lithium battery end

Abstract

The application discloses a kind of full tab lithium battery end automation batch roll welding machine, including feeding mechanism, conveying chain, discharging mechanism and positioning strip, the conveying chain is equipped with multiple clamps that form batch positioning battery shell;At the same time, each battery shell below is equipped with rotary support device, and each battery shell above is equipped with rolling welding device;In this way, when multiple clamps link feeding mechanism sequentially convey battery shell to form batch positioning, the bottom of the batch positioning battery shell can be simultaneously rotated and supported by rotary support device, and the top of the batch positioning battery shell is simultaneously subjected to end rolling welding of negative current collector by rolling welding device, and then batch output by discharging mechanism.Therefore, the end of the full tab lithium battery can be automatically welded in batch by the above-mentioned roll welding machine, and has the advantages of high efficiency and low energy consumption.In addition, the roll welding machine also uses synchronous power welding when the battery shell rolls, ensuring the reliability of the welding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of automatic batch welding device for full tab lithium battery end, in particular to a kind of full tab lithium battery end automatic batch roll welding machine. BACKGROUND

[0002] At present, in the production process of full tab lithium battery, the welding of negative current collector in the negative end hole of battery shell is a quite key technology, and the existing welding technology is usually single welding technology, that is, the battery shell and negative current collector sequentially conveyed on conveying mechanism are welded one by one by welding device. Obviously, the work efficiency of this welding technology is very low, and there is also high production energy consumption. At the same time, the traditional welding method mainly adopts laser welding. This welding method needs to perform circumferential laser spot welding around the outer ring of the battery shell, which not only reduces the welding efficiency, but also has the defect of poor welding quality. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the defects of the prior art and provide a full tab lithium battery end automatic batch welding machine with high efficiency, low energy consumption and reliable welding quality.

[0004] The technical problem of the present application is solved by the following technical scheme:

[0005] A kind of full tab lithium battery end automatic batch roll welding machine, comprising a feeding mechanism, a conveying chain connected to the feeding mechanism and a discharging mechanism connected to the conveying chain. A plurality of clamps are provided on the conveying chain, each clamp can form positioning or disengagement of the battery shell. Each battery shell is provided with a top hole and a negative current collector fitted in the top hole. The plurality of clamps on the conveying chain form positioning or disengagement of the batch of battery shells. A positioning strip is provided on one side of the conveying chain, which simultaneously forms positioning or disengagement of the batch of battery shells. A rotating support device is provided below each battery shell, and a roll welding device for welding negative current collector is provided above each battery shell. After the battery shells sequentially conveyed by the feeding mechanism and positioned in batches by the plurality of clamps, the rotating support devices below each battery shell simultaneously support the bottom of the batch of positioned battery shells, and the roll welding devices above each battery shell simultaneously perform end roll welding of negative current collector on the top of the batch of positioned battery shells. The batch of battery shells that have completed end roll welding are output in batches by the discharging mechanism.

[0006] The conveying chain is looped around a pair of conveying wheels to form a circulating rotation. The plurality of clamps are sequentially arranged along the conveying chain and are driven to move in a cycle by the conveying chain.

[0007] The positioning strip is arranged in parallel on one side of the conveying chain, and the side edge of the positioning strip is provided with a plurality of positioning recesses, and the plurality of positioning recesses are in the same position as the plurality of clamps on the adjacent conveying chain, and each positioning recess is in position or out of position with the battery shell on the corresponding clamp.

[0008] The rotating supporting device comprises a base and a supporting rod rotatably mounted on the base, and the base is provided with a base cylinder, which drives the base to drive the supporting rod to contact the bottom of the battery shell to form a rotating support or drives the base to drive the supporting rod to be separated from the bottom of the battery shell.

[0009] The rolling welding device comprises a top plate, a top plate cylinder mounted on the top plate, a polar plate and a polar plate cylinder mounted on the polar plate; the top plate is provided with a driving rod and a polar rod rotatably mounted and parallel to each other, the lower end of the driving rod is provided with a driving wheel, and the lower end of the polar rod is provided with a polar wheel; the polar plate is also provided with a polar rod rotatably mounted and a polar wheel arranged at the lower end of the polar rod; the top plate cylinder drives the top plate to drive the driving wheel and the polar wheel to contact the outer surface of the battery shell to drive the battery shell to rotate, or drives the top plate to drive the driving wheel and the polar wheel to be separated from the outer surface of the battery shell; the polar plate cylinder drives the polar plate to drive the polar wheel into the top hole and contact the inner surface of the battery shell to drive the battery shell to rotate, or drives the polar plate to drive the polar wheel to be separated from the top hole; the polar wheel mounted at the lower end of the polar rod on the top plate and the polar wheel mounted at the lower end of the polar rod on the polar plate are positive polar wheel and negative polar wheel respectively, and the positive polar wheel and the negative polar wheel are electrified at the same time to form a negative polar ring for rolling welding in the top hole.

[0010] The positive polar rod is provided with a positive electrode wire for electrifying the positive polar wheel, and the negative polar rod is provided with a negative electrode wire for electrifying the negative polar wheel; the driving rod is provided with a driving gear, and the driving wheel is a rubber roller.

[0011] The conveying chain is provided with two groups, and the two side edges of the positioning strip are respectively provided with a plurality of positioning recesses; the positioning strip is reciprocally arranged between the two conveying chains, and the plurality of positioning recesses on the two side edges of the positioning strip are respectively in position or out of position with the battery shell on the corresponding clamps of the two conveying chains.

[0012] The positioning strip is mounted on the positioning guide rail, and the positioning strip is provided with a positioning cylinder, and the positioning cylinder drives the positioning strip to reciprocally move along the positioning guide rail between the two conveying chains.

[0013] The feeding mechanism comprises a feeding screw and a feeding turntable connected with the feeding screw, and the conveying chain is connected with the feeding turntable.

[0014] The outer side of the feeding rotary disc is provided with an arc strip baffle, the outer side of the conveying chain is provided with an arc strip baffle and a straight strip baffle, the arc strip baffle of the outer side of the conveying chain is connected with the arc strip baffle of the outer side of the feeding rotary disc, and the side of the positioning strip is provided with a straight groove accommodating the straight strip baffle.

[0015] Compared with the prior art, the plurality of clamps on the conveying chain are designed to position or separate the batch of battery shells, the positioning strip added on one side of the conveying chain is designed to simultaneously position or separate the batch of battery shells, each battery shell is provided with a rotating supporting device below, and each battery shell is provided with a rolling welding device for welding the negative current collector above; in this way, when the plurality of clamps connected to the feeding mechanism sequentially convey the battery shells and form batch positioning, the rotating supporting device below each battery shell simultaneously rotates the bottom of the batch of positioned battery shells, and the rolling welding device above each battery shell simultaneously rolls and welds the end of the negative current collector on the top of the batch of positioned battery shells, and then the batch of battery shells with the end rolled and welded are simultaneously output by the discharging mechanism. Therefore, the automatic batch welding of the end of the full-tab lithium battery can be realized by the above-mentioned seam welding machine, so that the welding efficiency is greatly improved and the production energy consumption is reduced; in addition, the seam welding machine also adopts synchronous power welding when the battery shell rolls, that is, adopts a rolling resistance welding scheme, and the welding quality is more reliable compared with the traditional laser welding method. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present application.

[0017] Figure 2 It is a bottom view of Figure 1 .

[0018] Figure 3 It is an enlarged view of structure at A of Figure 1 .

[0019] Figure 4 It is a structural schematic diagram of the rolling welding device.

[0020] Figure 5 It is a schematic diagram of the cooperation structure of the positioning strip and the baffle. DETAILED DESCRIPTION

[0021] The embodiment of the present application will be described in detail below according to the above-mentioned drawings.

[0022] As Figures 1-5As shown, 1. feeding mechanism, 11. feeding screw, 12. feeding turntable, 2. conveying chain, 21. conveying wheel, 3. discharging mechanism, 4. positioning strip, 41. positioning guide rail, 42. positioning cylinder, 43. positioning gap, 44. straight slot, 5. clamp, 6. arc strip stop edge, 7. straight strip stop edge, 8. rotating support device, 81. base, 82. support rod, 83. base cylinder, 9. rolling welding device, 91. top plate, 92. top plate cylinder, 93. polar plate, 94. polar plate cylinder, 95. driving rod, 951. driving wheel, 952. driving gear, 96. positive pole rod, 961. positive pole wheel, 962. positive pole power line, 97. negative pole rod, 971. negative pole wheel, 972. negative pole power line, 10. battery shell.

[0023] An automatic batch rolling welding machine for full-tab lithium battery end, as shown in Figure 1 , Figure 2 , is an automatic batch welding device for full-tab lithium battery end, which is mainly composed of feeding mechanism 1, conveying chain 2, discharging mechanism 3 and positioning strip 4. In order to improve work efficiency, two sets of feeding mechanism 1, conveying chain 2 and discharging mechanism 3 are adopted, and the positioning strip 4 is arranged between the two conveying chains 2, as shown in Figure 1 .

[0024] Since the structures of the two sets of feeding mechanism 1, conveying chain 2 and discharging mechanism 3 are the same, only one of them is described in detail.

[0025] The feeding mechanism 1 includes feeding screw 11 and feeding turntable 12. The output end of the feeding screw 11 is tangent to the input end of the feeding turntable 12 to form a connection. The input end of the conveying chain 2 is also tangent to the output end of the feeding turntable 12 to form a connection. Therefore, the densely arranged multiple battery shells 10 are first sequentially conveyed by the feeding screw 11 to ensure equal spacing, then conveyed one by one to the feeding turntable 12, and finally conveyed one by one to the conveying chain 2 by the rotating feeding turntable.

[0026] The conveying chain 2 is wrapped around a pair of conveying wheels 21 to form a circulating rotation. The pair of conveying wheels 21 usually includes a driving wheel driven by a motor and a driven wheel assisting the circulating rotation of the conveying chain 2. A plurality of clamps 5 are arranged on the conveying chain 2. The plurality of clamps are sequentially arranged along the conveying chain 2 and are driven by the conveying chain to form a circulating movement. Each clamp 5 can form positioning or disengagement of the battery shell 10. Therefore, the plurality of clamps 5 on the conveying chain 2 can form positioning or disengagement of a batch of battery shells in actual work. Each battery shell 5 is provided with a top hole at the negative end and a negative current collector fitted in the top hole and welded integrally (not shown in the figure).

[0027] The arc strip stopper 6 is arranged outside the feeding turntable 12, and the arc strip stopper 6 is also arranged outside the conveying wheel 21 surrounding the conveying chain 2, and the straight strip stopper 7 is arranged outside the conveying chain 2 which is not surrounded by the conveying wheel 21, and the straight strip stopper 7 is sequentially connected with the two arc strip stoppers 6, which is mainly to prevent the side of the battery shell 10 from falling off during the conveying process of the feeding turntable 12 and the conveying chain 2.

[0028] The positioning strip 4 is arranged in parallel on one side of the conveying chain 2, that is, between the two conveying chains, and the conveying chain 2 mainly refers to the conveying chain 2 which is not surrounded by the conveying wheel 21, and the positioning strip 4 can reciprocate between the two conveying chains 2, and the specific structure is that the positioning strip 4 is installed on the positioning guide rail 41 which is perpendicular to the two conveying chains 2, and the positioning cylinder 42 is arranged on the positioning strip 4, and the positioning strip 4 is driven by the positioning cylinder 42 to reciprocate between the two conveying chains 2 along the positioning guide rail 41.

[0029] The two side edges of the positioning strip 4 are respectively provided with a plurality of positioning holes 43, and the number of the plurality of positioning holes 43 on any side edge is the same as that of the plurality of clamps 5 on the adjacent conveying chain 2, so that each positioning hole 43 on any side edge can be positioned with or separated from the battery shell 10 on the corresponding clamp 5.

[0030] That is, when the positioning strip 4 reciprocates between the two conveying chains 2, the positioning strip 4 approaches one of the conveying chains 2 and moves away from the other conveying chain, and the side edge of the positioning strip 4 approaching one of the conveying chains 2 can simultaneously position the batch of battery shells 10 positioned by the plurality of clamps 5 on the conveying chain 2 through the plurality of positioning holes 43, but the plurality of positioning holes 43 on the side edge of the positioning strip moving away from the other conveying chain 2 will be separated from the batch of battery shells 10 positioned by the plurality of clamps 5 on the other conveying chain; thus, the plurality of positioning holes 43 on the two side edges of the positioning strip 4 respectively form the positioning or separation with the battery shells 10 on the corresponding clamps 5 of the two conveying chains 2 alternately, so that at least one side edge can be positioned in batch when the positioning strip 4 reciprocates between the two conveying chains 2, and the working efficiency is greatly improved.

[0031] At the same time, the side edge of the positioning strip 4 is also provided with a straight groove 44 to accommodate the straight strip stopper 7, so as to prevent the positioning strip 4 from being interfered by the straight strip stopper 7 during reciprocating positioning.

[0032] The rotating supporting device 8 is arranged below each battery shell 10, and the rotating supporting device 8 comprises a base 81 and a supporting rod 82 rotatably installed on the base, and the base is provided with a base cylinder 83, and the base cylinder can drive the base 81 to drive the supporting rod 82 to contact the bottom of the battery shell 10 to form a rotating support, or to drive the base 81 to drive the supporting rod 82 to directly separate from the bottom of the battery shell 10.

[0033] The top plate 91 is provided with a driving rod 95 and a pole rod which are parallel to each other and are rotatably installed; the upper end of the driving rod 95 is provided with a driving gear 952 which can be used as the driving component of the driving rod 95, and the lower end of the driving rod is provided with a driving wheel 951 which is a rubber roller to improve the driving capacity; the pole plate 93 is also provided with a pole rod which is rotatably installed and a pole wheel which is installed at the lower end of the pole rod.

[0034] The top plate 91 is provided with a driving rod 95 and a pole rod which are parallel to each other and are rotatably installed; the upper end of the driving rod 95 is provided with a driving gear 952 which can be used as the driving component of the driving rod 95, and the lower end of the driving rod is provided with a driving wheel 951 which is a rubber roller to improve the driving capacity; the pole plate 93 is also provided with a pole rod which is rotatably installed and a pole wheel which is installed at the lower end of the pole rod.

[0035] The pole wheels installed at the lower end of the pole rod on the top plate 91 and the pole plate 93 are positive pole wheels 961 and negative pole wheels 971 respectively, that is, the positive pole wheels 961 and the negative pole wheels 971 at the lower end of the two pole rods can be designed interchangeably. In this embodiment, as shown in the figure, the pole rod at the lower end of the top plate 91 is provided with a positive pole wheel 961, and the pole rod is a positive pole rod 96, and a positive pole wire 962 is arranged on the positive pole rod 96 to provide power for the positive pole wheel 961; correspondingly, the pole rod at the lower end of the pole plate 93 is provided with a negative pole wheel 971, and the pole rod is a negative pole rod 97, and a negative pole wire 972 is arranged on the negative pole rod 97 to provide power for the negative pole wheel 971. Figure 4

[0036] The top plate gas cylinder 92 drives the top plate 91 to drive the driving wheel 951 and the positive pole wheel 961 to contact the outer surface of the battery shell 10 to drive the battery shell to rotate, or to drive the driving wheel 951 and the positive pole wheel 961 to be separated from the outer surface of the battery shell 10; the pole plate gas cylinder 94 drives the pole plate 93 to drive the negative pole wheel 971 to enter the top hole and contact the inner surface of the battery shell 10 to drive the battery shell to rotate, or to drive the pole plate 93 to drive the negative pole wheel 971 to be separated from the top hole; when the driving wheel 951 and the positive pole wheel 961 contact the outer surface of the battery shell 10 to drive the battery shell to rotate, and the negative pole wheel 971 enters the top hole to contact the inner surface of the battery shell 10 to also drive the battery shell to rotate, the simultaneous power supply of the positive pole wheel 961 and the negative pole wheel 971 can form the rolling welding of the negative pole current collector in the top hole.

[0037] The discharging mechanism 3 can adopt the same structure as the feeding mechanism 1 of this embodiment, or can be set according to the actual situation.

[0038] ​The working process of the present application is as follows: after the plurality of clamps 5 on the conveying chain 2 are engaged with the battery shell 10 sequentially conveyed by the feeding mechanism 1 and form batch positioning, the bottom of the batch positioned battery shell 10 is simultaneously supported by the rotating supporting device 8 under each battery shell, and the top of the batch positioned battery shell 10 is simultaneously positioned, driven to rotate and roll-welded with the negative current collector by the rolling welding device 9 above each battery shell, that is, the batch battery shell 10 is simultaneously formed by the roll-welding process, then the rotating supporting device 8 under each battery shell is separated from the bottom of the batch positioned battery shell 10 and the rolling welding device 9 above each battery shell is also separated from the top of the batch positioned battery shell 10, then the discharging mechanism 3 will output the battery shell 10 which has completed the batch roll-welding process.

[0039] In addition, during the operation of the present application, when the plurality of clamps 5 on the conveying chain 2 are positioned with the battery shell 10 to form a batch of a certain number, the feeding mechanism 1, the conveying chain 2 and the discharging mechanism 3 will all be paused to ensure the smooth completion of the roll-welding process, after the full-tab lithium battery end portion completes the automated batch roll-welding, the feeding mechanism 1, the conveying chain 2 and the discharging mechanism 3 are restarted, so that new battery shells 10 can be input one by one to form a batch, and the battery shells 10 which have completed the roll-welding are output one by one.

[0040] The above is only a specific embodiment of the present application, and those skilled in the art should understand that any equivalent structural design to the embodiment should be included in the protection scope of the present application.

Claims

1. An automatic batch roll welding machine for full-tab lithium battery end, comprising a feeding mechanism (1), a conveying chain (2) connected with the feeding mechanism and a discharging mechanism (3) connected with the conveying chain; a plurality of clamps (5) are arranged on the conveying chain (2), each of the clamps can form positioning or disengagement of a battery shell (10), and each of the battery shells (10) is provided with a top hole and a negative electrode current collector fitted in the top hole, characterized in that The multiple clamps (5) on the conveying chain (2) form positioning or disengaging of the batch battery cases (10); the conveying chain (2) is provided with a positioning strip (4) on one side, and the positioning strip simultaneously forms positioning or disengaging of the batch battery cases (10); each battery case (10) is provided with a rotating supporting device (8) below and a rolling welding device (9) for welding the negative pole current collector above; the multiple clamps (5) link the battery cases (10) conveyed by the feeding mechanism (1) in sequence and form batch positioning, and the rotating supporting device (8) below each battery case simultaneously rotates the bottom of the batch positioned battery cases, and the rolling welding device (9) above each battery case simultaneously rolls and welds the end of the negative pole current collector on the top of the batch positioned battery cases, and the batch battery cases (10) with the end rolling and welding simultaneously are output by the discharging mechanism (3) in batch; the conveying chain (2) is sleeved on a pair of conveying wheels (21) to form circulating rotation, the multiple clamps (5) are arranged in sequence along the conveying chain (2) and are driven by the conveying chain to form circulating movement; the rolling welding device (9) comprises a top plate (91), a top plate air cylinder (92) mounted on the top plate, a pole plate (93) and a pole plate air cylinder (94) mounted on the pole plate; the top plate (91) is provided with a driving rod (95) and a pole rod which are parallel to each other and are rotatably mounted, the lower end of the driving rod (95) is provided with a driving wheel (951), and the lower end of the pole rod is provided with a pole wheel; the pole plate (93) is also provided with a pole rod which is rotatably mounted and a pole wheel which is arranged at the lower end of the pole rod; the top plate air cylinder (92) drives the top plate (91) to simultaneously drive the driving wheel (951) and the pole wheel to contact the outer surface of the battery case (10) to drive the battery case to rotate, or drives the top plate (91) to simultaneously drive the driving wheel (951) and the pole wheel to be separated from the outer surface of the battery case (10); the pole plate air cylinder (94) drives the pole plate (93) to drive the pole wheel into the top hole and contact the inner surface of the battery case (10) to drive the battery case to rotate, or drives the pole plate (93) to drive the pole wheel to be separated from the top hole; the pole wheel mounted at the lower end of the pole rod on the top plate (91) is a positive pole wheel (961), the pole rod is a positive pole rod (96), the pole wheel mounted at the lower end of the pole rod on the pole plate (93) is a negative pole wheel (971), the pole rod is a negative pole rod (97), and the positive pole wheel (961) and the negative pole wheel (971) are simultaneously electrified to form rolling welding of the negative pole current collector in the top hole.

2. The automatic batch roll welder for full tab lithium battery end portion according to claim 1, characterized in that The positioning strip (4) is arranged parallel to one side of the conveying chain (2), the side edge of the positioning strip is provided with multiple positioning recesses (43), the number of the multiple positioning recesses is the same as that of the multiple clamps (5) on the adjacent conveying chain (2), and the positions of the multiple positioning recesses are consistent with those of the multiple clamps (5), each positioning recess (43) forms positioning or disengaging with the battery case (10) on the corresponding clamp (5).

3. The automatic batch roll welder for full tab lithium battery end portion according to claim 1, characterized in that The rotating supporting device (8) comprises a base (81) and a supporting rod (82) rotatably mounted on the base, and the base is provided with a base cylinder (83) for driving the base (81) to drive the supporting rod (82) to contact the bottom of the battery shell (10) to form a rotating support or drive the base (81) to drive the supporting rod (82) to be separated from the bottom of the battery shell (10).

4. The automatic batch roll welder for full tab lithium battery end portion according to claim 1, characterized in that The positive pole rod (96) is provided with a positive pole wire (962) for providing power supply for the positive pole wheel (961), and the negative pole rod (97) is provided with a negative pole wire (972) for providing power supply for the negative pole wheel (971); the driving rod (95) is provided with a driving gear (952), and the driving wheel (951) is a rubber roller.

5. The automatic batch roll welder for full tab lithium battery end portion according to claim 1, characterized in that The conveying chain (2) is provided with two groups, and the two side edges of the positioning strip (4) are respectively provided with a plurality of positioning holes (43); the positioning strip (4) is reciprocally arranged between the two conveying chains (2), and the plurality of positioning holes (43) on the two side edges of the positioning strip are respectively in mutual alternation with the battery shell (10) on the corresponding clamps (5) of the two conveying chains (2) to form positioning or separation.

6. The automatic batch roll welder for full tab lithium battery ends of claim 5, wherein The positioning strip (4) is mounted on the positioning guide rail (41), and the positioning strip is provided with a positioning cylinder (42) for driving the positioning strip (4) to reciprocally move along the positioning guide rail (41) between the two conveying chains (2).

7. The automatic batch roll welder for full tab lithium battery ends of claim 1, wherein The feeding mechanism (1) comprises a feeding screw (11) and a feeding turntable (12) connected with the feeding screw, and the conveying chain (2) is connected with the feeding turntable (12).

8. The automatic batch roll welder for full tab lithium battery ends of claim 7, wherein The feeding turntable (12) is provided with an arc strip stop edge (6) on the outside, the conveying chain (2) is provided with an arc strip stop edge (6) and a straight strip stop edge (7) on the outside, the arc strip stop edge (6) on the outside of the conveying chain (2) is connected with the arc strip stop edge (6) on the outside of the feeding turntable (12), and the side edge of the positioning strip (4) is provided with a straight groove (44) for accommodating the straight strip stop edge (7).

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