CN112397760B - Aluminum shell battery cover assembly machine - Google Patents

Abstract

The present invention belongs to the field of automated machinery technology, and in particular, relates to an integrated aluminum shell battery cover assembly machine, comprising: a frame, an explosion-proof valve welding device, a first pole assembly machine, a second pole assembly machine, a first transfer mechanism, and a second transfer mechanism; the explosion-proof valve welding device, the first pole assembly machine, and the second pole assembly machine are sequentially arranged on the frame; the first pole assembly machine and the second pole assembly machine are respectively used for positive electrode welding and negative electrode welding of the battery cover; the first transfer mechanism is arranged between the explosion-proof valve welding device and the first pole assembly machine, and the second transfer mechanism is arranged between the first pole assembly machine and the second pole assembly machine; the positioning molds in the first pole assembly machine and the second pole assembly machine are both provided with positioning bosses. After the explosion-proof valve is welded on the battery cover, the battery cover is transported to the first pole assembly machine by the first transfer mechanism to complete the welding of the positive pole of the battery cover, and the second transfer mechanism transfers the battery cover to the second pole assembly machine to complete the welding of the negative pole.

Description

Aluminum shell battery cover assembly machine

Technical Field

The invention belongs to the technical field of clamping and positioning machinery, and in particular relates to an aluminum shell battery cover plate assembly integrated machine.

Background Art

The aluminum shell battery is composed of an aluminum shell and a battery cover. The battery cover 1 is provided with an explosion-proof valve 4 and positive and negative electrodes; the explosion-proof valve and the positive and negative poles of the battery cover are welded to the battery cover. At present, the battery cover is welded with the explosion-proof valve first, and after the welding is completed, the battery cover is transferred to the pole welding position for welding by the operator. When welding the pole, the two pole assembly holes of the battery cover are positioned in the welding jig, and the sealing ring 3 and the pole 2 are assembled in the corresponding installation holes; the positioning jig runs to the welding position, and the pole 2 is welded to the battery cover 1 by the welding machine, please refer to Figure 28 for details. It not only increases the workload of welding, but also, because there are certain errors in the centers of the two pole positions of the battery cover, when the two holes are positioned, the position of the battery cover will be deviated. Therefore, during the welding process, there will be a phenomenon of poor pole welding, which will lead to the problem of poor quality of the battery cover.

Summary of the invention

The purpose of the present invention is to provide an aluminum shell battery cover plate assembly integrated machine, aiming to solve the current battery cover plate explosion-proof valve and pole welding efficiency is low, and may cause poor welding.

To achieve the above-mentioned purpose, an aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention includes: a frame, an explosion-proof valve welding device, a first pole assembly machine, a second pole assembly machine, a first transfer mechanism and a second transfer mechanism; the explosion-proof valve welding device, the first pole assembly machine and the second pole assembly machine are sequentially arranged on the frame; the explosion-proof valve welding device is used for explosion-proof valve assembly welding of the battery cover plate; the first pole assembly machine and the second pole assembly machine are respectively used for positive electrode welding and negative electrode welding of the battery cover plate; the first transfer mechanism is arranged between the explosion-proof valve welding device and the first pole assembly machine, and the second transfer mechanism is arranged between the first pole assembly machine and the second pole assembly machine; the first transfer mechanism is used to transfer the battery cover plate welded by the explosion-proof valve welding device to the first pole assembly machine, and the second transfer mechanism is used to transfer the battery cover plate welded with the positive pole by the first pole assembly machine to the second pole assembly machine; the positioning molds in the first pole assembly machine and the second pole assembly machine are both provided with positioning bosses for positioning the through holes of the poles to be welded on the battery cover plate.

Further, the explosion-proof valve welding device includes a dividing turntable arranged on the frame, a plurality of positioning jigs evenly arranged on the edge of the dividing turntable, and the following positioning jigs arranged on the frame in sequence around the dividing turntable:

A positioning and loading mechanism, used for picking up the battery cover plate to be welded and positioning it on the positioning jig;

An explosion-proof valve assembly mechanism, used to pick up the explosion-proof valve and position it at the explosion-proof welding position of the battery cover;

An explosion-proof valve welding mechanism, used for sealingly welding the explosion-proof valve to the battery cover; and

The detection and unloading mechanism is used to detect the air tightness of the battery cover plate after welding and transfer the battery cover plate to the first transfer mechanism.

Furthermore, the explosion-proof valve welding device also includes a laser coding mechanism and a flipping mechanism; the laser coding mechanism and the flipping mechanism are located between the positioning and loading mechanism and the explosion-proof valve assembly mechanism; the laser coding mechanism is used to code the outer surface of the battery cover, and the flipping mechanism is used to flip the battery cover so that the battery cover is positioned in the positioning fixture with the reverse side facing up.

Furthermore, the flipping mechanism includes a support seat, a lifting cylinder and a rotary pneumatic clamp; the support seat is arranged on the frame, the lifting cylinder is arranged on the support seat, the rotary pneumatic clamp is arranged at the lifting end of the lifting cylinder, and the clamping claws of the rotary pneumatic clamp face the dividing turntable.

Furthermore, there are two groups of explosion-proof valve welding mechanisms, one group of explosion-proof valve welding mechanisms is used for spot welding of the explosion-proof valve and the battery cover, and the other explosion-proof valve welding mechanism is used for sealing welding of the explosion-proof valve and the battery cover.

Furthermore, the explosion-proof valve welding mechanism includes a first laser welding machine, a lifting mechanism and a protective pressure plate. The first laser welding machine is arranged on one side of the frame, the lifting mechanism is arranged on the frame, and the protective pressure plate is arranged at the lifting end of the lifting mechanism and is located above the dividing turntable; the lifting mechanism drives the protective pressure plate to be pressed on the upper surface of the battery cover, and the protective pressure plate is provided with an air avoidance hole for avoiding the laser beam of the first laser welding machine.

Furthermore, the positioning jig includes a jig body, two positioning pins and a positioning block; the two positioning pins are relatively arranged on the jig body and extend upward; a positioning mounting hole is provided on the jig body, and the positioning block is arranged in the positioning mounting hole for positioning the explosion-proof valve to be welded; a trachea joint connected to the positioning mounting hole is provided on one side of the jig body for connecting to a negative pressure system, and an adsorption groove is provided on the positioning block, and the negative pressure system forms negative pressure on the top of the positioning block.

Further, the detection and unloading mechanism includes a second indexing turntable, and a first transfer robot, a leakage detection mechanism, a shaping mechanism, and a second transfer robot sequentially arranged around the second indexing turntable; four groups of lower molds are evenly arranged on the second indexing turntable, and the lower molds are provided with positioning grooves, and the bottom of the positioning grooves is provided with air-avoiding through holes, and the edges of the air-avoiding through holes are provided with sealing rings;

The air leakage detection mechanism comprises a second lifting mechanism, a first lifting mechanism, an upper detection die and a lower pressing block; the second lifting mechanism is arranged on the frame, the upper detection die is arranged at the lifting end of the second lifting mechanism, a detection hole is arranged in the helium detection upper die, the edge of the detection hole is arranged on a sealing ring protruding downward, and the detection hole is connected to the helium mass spectrometer leak detector; the first lifting mechanism is arranged on the frame and located at the bottom end of the second indexing turntable, the lower pressing block is arranged at the upper end of the first lifting mechanism, and the lower pressing block is provided with an air hole connected to the helium mass spectrometer leak detector; the second indexing turntable is provided with an avoidance position to avoid the contact between the lower pressing block and the lower die;

The shaping mechanism comprises a pressing mechanism and a shaping upper die; the shaping upper die is arranged at the lifting end of the pressing mechanism;

The frame is also provided with a plurality of support rods, and the upper ends of the support rods are provided with pulleys contacting the bottom of the second indexing turntable.

Furthermore, both the first pole assembly machine and the second pole assembly machine are turntable assembly machines; the turntable assembly machine comprises:

An indexing turntable mechanism is provided on the frame and is used to drive the turntable on the indexing turntable mechanism to index and rotate; a positioning mold, a plurality of the positioning molds are equidistantly distributed on the edge of the turntable of the indexing turntable mechanism; the positioning mold is provided with a positioning boss and at least one limiting edge, the positioning boss is used to locate the through hole of the battery cover plate to be welded with the pole, and the limiting edge is used to locate the side edge of the battery cover plate;

And, arranged in sequence along the rotation direction of the indexing turntable mechanism are:

A feeding mechanism; used for picking up the battery cover and positioning it on the positioning mold;

The sealing ring assembly mechanism is used to pick up the sealing ring and position it in the assembly hole of the battery cover;

The pole assembly mechanism is used to pick up the pole and position it into the assembly hole of the battery cover;

A protective cover picking mechanism is used to pick up the protective cover and cover it on the pole assembled in the battery cover plate;

A laser welding device, used to seal and weld the pole into the mounting hole of the battery cover;

A protective cover taking manipulator, used for clamping the protective cover on the battery cover; and

The unloading robot is used to transfer the battery cover plate with a pole welded thereon to the transfer mechanism.

Furthermore, the turntable assembly machine also includes a first CCD detection mechanism and a second CCD detection mechanism. The first CCD detection mechanism is arranged between the sealing ring assembly mechanism and the pole assembly mechanism, and is used to detect the sealing ring assembled on the battery cover; the second CCD detection mechanism is arranged between the protective cover picking mechanism and the laser welding device.

Furthermore, the positioning mold is longitudinally arranged on the turntable, and the center line of the positioning mold in the length direction is arranged along the radial direction of the turntable.

Furthermore, the sealing ring assembly mechanism includes a vibrating feed tray, a conveying track, a first manipulator and a suction mechanism; the vibrating feed tray, the conveying track and the first manipulator are all arranged on the frame, the conveying track is connected to the output end of the vibrating feed tray, a conveying track groove is arranged in the conveying track, a positioning cavity is arranged at the end of the conveying track, and the suction mechanism is arranged at the lifting end of the first manipulator; the first manipulator drives the suction mechanism to extend into the positioning cavity, and sucks the positioning sealing ring onto the battery cover.

Furthermore, the suction mechanism includes a connecting rod, a lower pressure sleeve, a limiting sleeve, a compression spring and a lower pressure power piece; the upper end of the connecting rod is connected to the lifting end of the first manipulator; the lower pressure sleeve is loosely mounted on the connecting rod; the lower end of the lower pressure sleeve is provided with a step hole, and the upper end is provided with a cavity, one side of the cavity is provided with an air hole, which is connected to the negative pressure system, and the bottom of the cavity is provided with an adsorption hole that passes through the bottom; the lower end of the connecting rod is provided with a positioning part that loosely matches the step hole, and the compression spring is provided in the step hole, which is used to squeeze the lower pressure sleeve so that the end of the positioning part extends out of the step hole; the lower pressure power piece is connected to the lower pressure sleeve, which is used to push the lower pressure sleeve downward; the negative pressure system causes the bottom of the lower pressure sleeve to produce negative pressure, which is used to absorb the sealing ring; the diameter of the positioning part is smaller than the inner diameter of the sealing ring.

Furthermore, a downwardly recessed blind hole is provided on the positioning boss, and an upwardly protruding positioning platform is provided at the bottom of the blind hole; an extension portion is extended downward from the bottom of the positioning portion, and the diameter of the extension portion is smaller than the diameter of the positioning portion, and a positioning hole is provided at the bottom of the extension portion for positioning and cooperating with the positioning platform.

Furthermore, a downwardly recessed groove is provided on the top of the positioning platform, a suction nozzle is provided in the groove, the suction nozzle is connected to the negative pressure mechanism, and the suction nozzle is not lower than the groove.

Furthermore, the suction nozzle is connected to an elastic floating member so that the suction nozzle moves downward under pressure.

Further, the positioning mold comprises a connecting seat, a bottom plate, a guide support column, a positioning body, a guide column and a reset spring; the connecting seat is arranged on the turntable, the connecting seat is provided with two guide holes, the two guide support columns slide through the corresponding guide holes, the positioning body connects the upper ends of the two guide support columns, the positioning boss and the limiting edge are arranged on the positioning body; the bottom plate connects the lower ends of the two guide support columns, the two guide columns are arranged at the bottom end of the connecting seat, the lower ends of the guide columns slide through the bottom plate, and the reset spring is sleeved on each of the guide columns;

The laser welding device comprises a second laser welding machine, a mounting seat, a mounting plate, a rotating gear, a cylinder, a rack, a pressure head and a second lifting mechanism; the second laser welding machine is arranged on one side of the frame, the mounting seat is arranged on the frame, the mounting plate is arranged on the upper end of the mounting seat, a bearing hole, a countersunk hole and a slide groove are arranged on the mounting plate, and the slide groove forms a notch on one side of the countersunk hole, a connecting part is arranged at the lower end of the rotating gear, the connecting part is rotatably connected with the bearing hole, the rotating gear is located in the countersunk hole, the rotating gear is arranged in the hole, a pressing connecting part is extended toward the center from the inner side of the inner hole, and the pressure head is arranged at the bottom of the pressing connecting part; the rack is slidably arranged in the slide groove and meshes with the rotating gear, the cylinder is arranged on one side of the mounting plate and connected to the rack; the second lifting mechanism is arranged at the lower end of the mounting seat, and is used to lift the corresponding bottom plate upward; the mounting plate and the second lifting mechanism are located on the upper and lower sides of the turntable.

Furthermore, the second lifting mechanism includes a slide rail, a lifting seat, an elastic pressure piece and an electric cam mechanism; the two slide rails are arranged on one side of the mounting seat, the lifting seat is slidably connected to the two slide rails, the elastic pressure piece is arranged on the lifting seat, and the electric cam mechanism is arranged at the lower end of the mounting seat for pushing the lifting seat to rise.

Furthermore, the positioning body includes a mold base and a positioning seat, the mold base is provided with a mounting hole, the positioning seat is slidably arranged in the mounting hole, and the upper end of the positioning seat extends out of the mounting hole to form the positioning boss; a second blind hole recessed downward is provided on the positioning boss, a suction nozzle is provided in the second blind hole, and the suction nozzle is connected to the negative pressure system; the lower end of the positioning seat is higher than the bottom end of the mounting hole, the upper end of the guide support column extends into the lower end of the mounting hole, and a gap is provided between the guide column support column and the positioning seat, and a second compression spring for squeezing the positioning seat is provided in the guide column support column.

Furthermore, the pole assembly mechanism includes a pole conveying mechanism and a second manipulator provided on the frame; the pole conveying mechanism is used to convey the poles, and the second manipulator is used to pick up the poles on the pole conveying mechanism and assemble them on the battery cover of the positioning mold;

The protective cover picking mechanism includes a second vibrating feeding tray and a third manipulator, wherein the second vibrating feeding tray is used to convey the protective cover, and the third manipulator is used to pick up the protective cover from the second vibrating feeding tray and place it on the pole of the battery cover.

The above one or more technical solutions in the aluminum shell battery cover plate assembly integrated machine provided by the embodiment of the present invention have at least the following technical effects:

1. After the explosion-proof valve is welded by the explosion-proof valve welding device on the battery cover, the battery cover is transported to the first pole assembly machine by the first transfer mechanism to complete the welding of the positive pole of the battery cover, and then the battery cover is transferred to the second pole assembly machine by the second transfer mechanism to complete the welding of the negative pole, thereby realizing automated welding and improving efficiency.

2. When the battery cover is positioned in the positioning mold of the first pole assembly machine, the positioning boss of the positioning mold only positions the through holes of the battery cover where the poles need to be welded, thereby ensuring the accuracy of the sealing ring and the pole assembly on the battery cover. During the assembly and welding process, there will be no problem of poor assembly and welding accuracy caused by the error in the center distance between the two through holes of the battery cover, thereby ensuring the accuracy of the battery assembly after welding and improving the yield rate of the battery.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a three-dimensional diagram of an aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 2 is a top view of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG3 is a structural diagram of the explosion-proof valve welding device of the aluminum shell battery cover plate assembly integrated machine provided in an embodiment of the present invention.

FIG. 4 is a structural diagram of the flipping mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG5 is a structural diagram of the explosion-proof valve welding mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 6 is a structural diagram of the positioning fixture of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 7 is a structural diagram of the detection and unloading mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG8 is a structural diagram of the lower mold of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 9 is a structural diagram of the air leakage detection mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 10 is a structural diagram of the other side of the detection and unloading mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 11 is a three-dimensional view of the turntable assembly machine of the aluminum shell battery cover assembly machine provided in an embodiment of the present invention.

FIG. 12 is a top view of the turntable assembly machine of the aluminum shell battery cover assembly machine provided in an embodiment of the present invention.

FIG. 13 is a structural diagram of the turntable of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 14 is a structural diagram of the sealing ring assembly mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 15 is a structural diagram of the suction mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 16 is a structural diagram of the positioning mold of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 17 is a cross-sectional view of the positioning mold of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 18 is a partial enlarged view of FIG. 7 .

FIG. 19 is a structural diagram of another embodiment of the positioning mold of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 20 is a structural diagram of another embodiment of the positioning mold of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 21 is a cross-sectional view of FIG. 10 .

FIG. 22 is a structural diagram of the laser welding device of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 23 is a structural diagram of the second lifting mechanism portion of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 24 is a cross-sectional view of the mounting plate of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 25 is a structural diagram of the pole assembly mechanism of the aluminum shell battery cover assembly machine provided in an embodiment of the present invention.

FIG. 26 is a structural diagram of the protective cover picking mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 27 is a structural diagram of the feeding mechanism of the aluminum shell battery cover plate assembly machine provided in an embodiment of the present invention.

FIG. 28 is a structural diagram of a battery cover.

DETAILED DESCRIPTION

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

In one embodiment of the present invention, referring to FIG. 1, FIG. 2 and FIG. 16, an aluminum shell battery cover plate assembly machine includes: a frame 100, an explosion-proof valve welding device 400, a first pole assembly machine 20, a second pole assembly machine 21, a first transfer mechanism 300 and a second transfer mechanism 500. The explosion-proof valve welding device 400, the first pole assembly machine 20 and the second pole assembly machine 21 are sequentially arranged on the frame 100. The explosion-proof valve welding device 400 is used for explosion-proof valve assembly welding of battery cover plates. The first pole assembly machine 20 and the second pole assembly machine 21 are respectively used for positive electrode welding and negative electrode welding of battery cover plates. The first transfer mechanism 300 is arranged between the explosion-proof valve welding device 400 and the first pole assembly machine 20, and the second transfer mechanism 500 is arranged between the first pole assembly machine 20 and the second pole assembly machine 21. The first transfer mechanism 300 is used to transfer the battery cover plate welded by the explosion-proof valve welding device 400 to the first pole assembly machine 300, and the second transfer mechanism 500 is used to transfer the battery cover plate welded with the positive pole by the first pole assembly machine 20 to the second pole assembly machine 21; the positioning molds 220 in the first pole assembly machine 20 and the second pole assembly machine 21 are both provided with positioning bosses 221, which are used to locate the through holes of the poles to be welded on the battery cover plate. After the explosion-proof valve is welded on the battery cover plate by the explosion-proof valve welding device 400, the battery cover plate is transported to the first pole assembly machine 20 by the first transfer mechanism 300 to complete the welding of the positive pole of the battery cover plate, and then the battery cover plate is transferred to the second pole assembly machine 21 by the second transfer mechanism 500 to complete the welding of the negative pole, thereby realizing automated welding and improving efficiency. During pole welding, when the battery cover is positioned in the positioning mold 220 of the first pole assembly machine 21, the positioning boss 221 of the positioning mold 220 only positions the through hole of the battery cover where the pole needs to be welded, thereby ensuring the accuracy of the sealing ring and the pole assembly on the battery cover. During the assembly and welding process, there will be no problem of poor assembly and welding accuracy caused by the error in the center distance between the two through holes of the battery cover, thereby ensuring the accuracy of the battery after assembly welding and improving the yield rate of the battery.

Further, referring to FIGS. 1 to 3 , the explosion-proof valve welding device 400 includes a graduated turntable 410 disposed on the frame 100, a plurality of positioning fixtures 420 evenly disposed on the edge of the graduated turntable 410, and a positioning and loading mechanism 430, an explosion-proof valve assembly mechanism 440, an explosion-proof valve welding mechanism 450, and a detection and unloading mechanism 460 disposed on the frame 100 in sequence around the graduated turntable 410. Among them:

The positioning and loading mechanism 430 is used to pick up the battery cover to be welded and position it on the positioning fixture 420. Specifically, the positioning and loading mechanism 430 includes a belt conveyor and a loading manipulator, and the battery cover on the suction belt conveyor is positioned on the positioning fixture 420 by the loading manipulator.

The explosion-proof valve assembly mechanism 440 is used to pick up the explosion-proof valve and position it on the explosion-proof welding position of the battery cover. Specifically, the explosion-proof valve assembly mechanism 440 includes a belt conveyor, a negative pressure suction manipulator, a transfer manipulator and a material storage frame. The belt of the belt conveyor is provided with a positioning groove; the transfer manipulator sucks the explosion-proof valve in the material storage frame and places it in the positioning groove on the belt conveyor, and the explosion-proof valve is conveyed to the position of the negative pressure suction manipulator by the belt conveyor, and the explosion-proof valve is sucked by the negative pressure suction manipulator and positioned on the battery cover to realize the loading of the explosion-proof valve. The explosion-proof valve welding mechanism 450 is used to seal the explosion-proof valve on the battery cover; the detection and unloading mechanism 460 is used to detect the airtightness of the battery cover after welding, and transfer the battery cover to the first transfer mechanism 300. Specifically, the positioning and loading mechanism 430 positions the battery cover plate in the positioning fixture 420, and the explosion-proof valve is positioned and assembled to the explosion-proof valve assembly position of the battery cover plate through the explosion-proof valve assembly mechanism 440; the explosion-proof valve welding mechanism 450 welds the explosion-proof valve to the battery cover plate, and then the battery cover plate is transferred to the first transfer mechanism 300 after inspection by the inspection and unloading mechanism 460.

Further, referring to FIG. 3 and FIG. 4 , the explosion-proof valve welding device 400 further includes a laser coding mechanism 480 and a flipping mechanism 470. The laser coding mechanism 480 and the flipping mechanism 470 are located between the positioning and loading mechanism 430 and the explosion-proof valve assembly mechanism 440. The laser coding machine 480 is used to code the outer surface of the battery cover, and the flipping mechanism 470 is used to flip the battery cover so that the reverse side of the battery cover faces upward and is positioned in the positioning fixture 420. In this embodiment, after the battery cover is positioned in the positioning fixture 420 by the positioning and loading mechanism 430, it is driven by the indexing turntable 410 to rotate to the position of the laser coding mechanism 480, and the upper surface of the battery cover is marked by the laser coding mechanism 480; when it rotates to the position of the flipping mechanism 470, the flipping mechanism 470 flips the battery cover 180° so that the back of the battery cover faces upward, and the explosion-proof valve can be positioned on the inner side of the battery cover.

Further, referring to FIG. 4 , the flipping mechanism 470 includes a support base 471, a lifting cylinder 472, and a rotating pneumatic clamp 473. The support base 471 is disposed on the frame 100, the lifting cylinder 472 is disposed on the support base 471, the rotating pneumatic clamp 473 is disposed at the lifting end of the lifting cylinder 472, and the clamping claw of the rotating pneumatic clamp 473 faces the indexing turntable 410. In this embodiment, the battery cover is clamped by the rotating pneumatic clamp 473, the battery cover is lifted by the lifting cylinder 472, and the rotating pneumatic clamp 473 drives the battery cover to flip 180°, and the battery cover is repositioned in the positioning fixture 410.

Furthermore, the explosion-proof valve welding mechanism 440 is provided in two groups, one group of the explosion-proof valve welding mechanism 440 is used for spot welding the explosion-proof valve and the battery cover, and the other explosion-proof valve welding mechanism 440 is used for sealing welding the explosion-proof valve and the battery cover. In this embodiment, the explosion-proof valve is spot welded to the battery cover by one explosion-proof valve welding mechanism 440, and then the battery cover is driven to the welding position of another explosion-proof valve welding mechanism 440 by the indexing turntable 410, and the explosion-proof valve is welded to the battery cover in a whole circle by another explosion-proof valve welding mechanism 440 to achieve sealing welding.

Further, referring to FIG. 3 and FIG. 4 , the explosion-proof valve welding mechanism 440 includes a first laser welding machine 441, a lifting mechanism 442 and a protective pressure plate 443. The first laser welding machine 441 is arranged on one side of the frame 100, the lifting mechanism 442 is arranged on the frame 100, and the protective pressure plate 443 is arranged at the lifting end of the lifting mechanism 440 and is located above the indexing turntable 410. The lifting mechanism 442 drives the protective pressure plate 443 to be pressed on the upper surface of the battery cover. The protective pressure plate 443 is provided with an air avoidance hole 444 for avoiding the laser beam of the first laser welding machine 441. During the welding process, the protective pressure plate 443 is driven by the lifting mechanism 442 to press down on the battery cover. During welding, the welding slag can be prevented from splashing onto the surface of the battery cover, thereby protecting the battery cover.

Further, referring to Figure 6, the positioning fixture 420 includes a fixture body 421, two positioning pins 422 and a positioning block 423. The two positioning pins 422 are relatively arranged on the fixture body 421 and extend upward. A positioning mounting hole 424 is provided on the fixture body 421, and the positioning block 423 is arranged in the positioning mounting hole 424 for positioning the explosion-proof valve to be welded. An air pipe connector 425 connected to the positioning mounting hole 424 is provided on one side of the fixture body 421 for connecting to the negative pressure system. The positioning block 423 is arranged on an adsorption groove, and the negative pressure system forms negative pressure on the top of the positioning block 423. In this embodiment, when the battery cover is positioned on the positioning fixture 420, the through holes for installing the two pole pieces of the battery cover are positioned by two positioning pins 422, thereby positioning the battery cover. When the explosion-proof valve is assembled, the explosion-proof valve is sucked and positioned on the positioning block 423 by the explosion-proof valve assembly mechanism 440, and negative pressure is generated at the upper end of the positioning block 423 through the negative system, thereby fixing the explosion-proof valve, ensuring that the explosion-proof valve is not misplaced during the welding process, and ensuring the welding accuracy.

Further, referring to Figures 7 and 10, the detection and unloading mechanism 460 includes a second indexing turntable 461, and a first transfer robot 462, a leakage detection mechanism 463, a shaping mechanism 464, and a second transfer robot 465 which are sequentially arranged around the second indexing turntable 461. Four groups of lower molds 466 are evenly arranged on the second indexing turntable 461, and the lower molds 466 are provided with positioning grooves, and the bottom of the positioning grooves is provided with air-avoiding through holes 467, and the edges of the air-avoiding through holes are provided with sealing rings 468; specifically, when the battery cover plate welded with the explosion-proof valve is positioned in the positioning groove by the first transfer robot 462, the explosion-proof valve extends into the air-avoiding through holes 467.

1 to 10, the air leakage detection mechanism 463 includes a second lifting mechanism 4630, a first lifting mechanism 4631, a detection upper mold 4632 and a lower pressing block 4633. The second lifting mechanism 4630 is arranged on the frame 100, the detection upper mold 4632 is arranged at the lifting end of the second lifting mechanism 4630, and a detection hole is arranged in the helium detection upper mold 4632, and the edge of the detection hole is arranged on a sealing ring protruding downward, and the detection hole is connected to the helium mass spectrometer leak detector. The first lifting mechanism 4631 is arranged on the frame 100 and is located at the bottom end of the second indexing turntable 461, and the lower pressing block 4633 is arranged at the upper end of the first lifting mechanism 4631, and the lower pressing block 4633 is provided with an air hole connected to the helium mass spectrometer leak detector. The second indexing turntable 461 is provided with an air avoidance position to avoid the contact between the lower pressing block 4633 and the lower mold 466. Specifically, when testing air tightness, the second lifting mechanism 4630 pushes the upper testing mold 4632 downward, so that the sealing ring protruding downward at the edge of the testing hole is pressed against the edge of the explosion-proof valve. The first lifting mechanism 4631 pushes the lower pressing block 4633 upward to fit with the corresponding lower mold 466, and the air tightness of the explosion-proof valve is tested by a helium mass spectrometer leak detector.

The shaping mechanism 464 includes a pressing mechanism 4641 and a shaping upper die 4642; the shaping upper die 4642 is arranged at the lifting end of the pressing mechanism 4641. The pressing mechanism 4641 pushes the shaping upper die 4642 downward to shape the battery cover with the lower die 466.

The frame 100 is also provided with a plurality of support rods 101, and the upper ends of the support rods 101 are provided with pulleys 102 that contact the bottom of the second indexing turntable 461. In the process of detection and shaping, the second indexing turntable 461 is supported.

The embodiments of the first pole assembly machine 20 and the second pole assembly machine 21 are specifically both turntable assembly machines 200, please refer to Figures 1, 2 and 11; the turntable assembly machine 200 includes: a dividing turntable mechanism 210, a positioning mold 220, a sealing ring assembly mechanism 230, a pole assembly mechanism 240, a protective cover picking mechanism 250, a laser welding device 260, a protective cover taking robot 270, a material unloading robot 280 and a material loading mechanism 290. Among them:

The indexing turntable mechanism 210 is disposed on the frame 100 and is used to drive the turntable 211 on the indexing turntable mechanism 210 to rotate in an indexing manner.

The plurality of positioning molds 220 are equidistantly distributed on the edge of the turntable 211 of the indexing turntable mechanism 210, please refer to Figures 11 to 13. The positioning mold 220 is provided with a positioning boss 221 and at least one limiting edge 222, the positioning boss 221 is used to locate the through hole of the battery cover to be welded with the pole, and the limiting edge 222 is used to locate the side of the battery cover. The feeding mechanism 290, the sealing ring assembly mechanism 230, the pole assembly mechanism 240, the protective cover picking mechanism 250, the laser welding device 260, the protective cover taking manipulator 240 and the unloading manipulator 280 are arranged in sequence along the rotation direction of the indexing turntable mechanism 210. When welding the positive electrode to the battery cover, the loading mechanism 290 clamps the battery cover and positions it on the positioning mold 220, and the positioning boss 221 on the positioning mold 220 is positioned in the through hole of the pole assembly position, and the limiting edge 222 limits the side of the battery cover. The positioning mold 220 with the battery cover positioned by the dividing turntable mechanism 210 passes through the sealing ring assembly mechanism 230, the pole assembly mechanism 240, the protective cover picking mechanism 250, the laser welding device 260, the protective cover taking robot 270 and the unloading robot 280 in sequence. The sealing ring assembly mechanism 230 positions the sealing ring on the battery cover, the pole assembly mechanism 240 positions the pole on the sealing ring, the protective cover picking mechanism 250 covers the protective cover on the upper end of the pole, the laser welding device 260 welds the pole on the battery cover, the protective cover taking manipulator 270 takes out the protective cover, and the unloading manipulator 280 places the battery cover with a pole welded on the second transfer mechanism 500, and transfers the second pole assembly machine 21 to complete the welding of the negative pole of the battery, thereby realizing automatic welding, improving efficiency, and reducing production costs. When the battery cover is positioned in the positioning mold 220, the positioning mold 220 is to position the through hole of the battery cover where the pole needs to be welded, thereby ensuring the accuracy of the sealing ring and the pole assembly on the battery cover. In the process of assembly and welding, the problem of poor assembly accuracy caused by the error in the center distance between the two through holes of the battery cover will not occur, thereby ensuring the accuracy of the battery assembly after welding and improving the yield rate of the battery.

Further, referring to FIG. 11 and FIG. 12 , the turntable assembly machine 200 further includes a first CCD detection mechanism 201 and a second CCD detection mechanism 202. The first CCD detection mechanism 201 is disposed between the sealing ring assembly mechanism 230 and the pole assembly mechanism 230, and is used to detect whether the position of the sealing ring assembled on the battery cover is accurate. The second CCD detection mechanism 202 is disposed between the protective cover picking mechanism 250 and the laser welding device 260. The position of the protective cover is detected by the second CCD detection mechanism 202, thereby ensuring the quality of welding during welding and improving the welding yield rate.

Further, referring to FIG. 13 , the positioning mold 220 is longitudinally arranged on the turntable 211, and the center line of the length direction of the positioning mold 220 is arranged along the radial direction of the turntable 211. In this embodiment, by longitudinally arranging the positioning mold 220, it is possible to save space on the turntable, and by adjusting the placement of the same positioning mold 220, the turntable 211 of this embodiment can be minimized, thereby reducing the overall volume of the device and reducing the cost of the device.

The sealing ring assembly mechanism 230 is a specific embodiment, please refer to Figure 14 for details, which includes a vibrating feed tray 231, a conveying track 232, a first manipulator 233 and a suction mechanism 234. The vibrating feed tray 231, the conveying track 232 and the first manipulator 233 are all arranged on the frame 100, the conveying track 232 is connected to the output end of the vibrating feed tray 231, a conveying track groove 235 is arranged in the conveying track 232, a positioning cavity 236 is arranged at the end of the conveying track 232, and the suction mechanism 234 is arranged at the lifting end of the first manipulator 233; the first manipulator 233 drives the suction mechanism 234 to extend into the positioning cavity 236, and sucks the positioning sealing ring onto the battery cover. Specifically, the sealing rings are transported one by one into the conveying track groove 235 by the vibrating feeding tray 231, and the sealing ring at the front end is pushed to be positioned in the positioning cavity 236, and the first manipulator 233 drives the suction mechanism 234 to move and suck the sealing ring and position it to the sealing ring assembly position of the battery cover.

Further, please refer to Figure 15, the suction mechanism 234 includes a connecting rod 2341, a lower pressure sleeve 2342, a compression spring 2344 and a lower pressure power member 2345. The upper end of the connecting rod 2341 is connected to the lifting end of the first manipulator 233. The lower pressure sleeve 2342 is sleeved on the connecting rod 2341 with a clearance fit. The lower end of the lower pressure sleeve 2342 is provided with a step hole 2346, and the upper end is provided with a cavity 2347. One side of the cavity 2347 is provided with an air hole 2348, which is connected to the negative pressure system, and the bottom of the cavity 2347 is provided with an adsorption hole that passes through to the bottom of the lower pressure sleeve. The lower end of the connecting rod 2341 is provided with a positioning portion 2349 which is gap-matched with the step hole 2346. The compression spring 2344 is arranged in the step hole 2346 and is used to squeeze the lower pressure sleeve 2342 so that the end of the positioning portion 2349 extends out of the step hole 2346. The downward pressure power member 2345 is connected to the lower pressure sleeve 2342 and is used to push the lower pressure sleeve 2342 downward. The negative pressure system causes the bottom of the lower pressure sleeve 2342 to produce negative pressure for sucking the sealing ring. In this embodiment, when the sealing ring in the positioning cavity 236 is sucked, the first manipulator 233 drives the suction mechanism 234 to descend as a whole, and the positioning part 2349 extends into the inner ring of the sealing ring to achieve the guiding and positioning of the sealing ring, and the suction hole generates negative pressure through the negative pressure system, so that the sealing ring is sucked on the bottom of the lower pressing sleeve 2342, and the first manipulator 233 drives the whole to move, so that the sealing ring is located at the sealing ring assembly position of the battery cover, and the lower pressing sleeve 2342 is pushed by the pressing power part 2345, so that the seal is pushed downward and assembled at the sealing ring assembly position. Further, the outer diameter of the positioning part 2349 is smaller than the aperture of the sealing ring, so that when the sealing ring is set on the positioning part 2349, the sealing ring can be prevented from being deformed, and when the sealing ring is pushed down by the lower pressing sleeve 2342, the sealing ring can be prevented from being scratched and deformed, thereby effectively preventing the sealing ring from being dislocated due to the deformation elastic force when it is assembled in the case position.

This embodiment is an embodiment of the positioning mold 220. Please refer to Figures 16 to 18. The positioning boss 221 is also provided with a downwardly recessed blind hole 223, and the bottom of the blind hole 223 is provided with an upwardly protruding positioning platform 224. The positioning platform 224 and the blind hole 223 directly form a fixed groove. An extension portion 2340 extends downward from the bottom of the positioning portion 2349. The diameter of the extension portion 2340 is smaller than the diameter of the positioning portion 2349. A positioning hole is provided at the bottom of the extension portion 2340 for positioning and matching with the positioning platform 224. In this embodiment, when the sealing ring is assembled on the battery cover, the positioning hole is positioned on the positioning platform 224, and the extension portion 2340 is positioned in the positioning groove; thereby achieving the positioning of the sealing ring and improving the accuracy of the sealing ring assembly.

Furthermore, a downwardly recessed groove is provided on the top of the positioning platform 224, and a suction nozzle 225 is provided in the groove. The suction nozzle 225 is connected to the negative pressure mechanism, and the suction nozzle 225 is not lower than the groove. In this embodiment, when the pole is assembled with the battery cover by the pole assembly mechanism 240, the pole is adsorbed by the suction nozzle 225 to prevent the pole from contacting the sealing ring before welding, thereby preventing the pole from shaking when the turntable 211 rotates, causing the sealing ring to be misaligned.

Furthermore, the suction nozzle 225 is connected to the elastic floating member, and during the pole welding process, when the pole is pressed down, the suction nozzle 225 can move downward, so that the pole can fit tightly with the sealing ring.

Another specific embodiment of the positioning mold 220, please refer to Figures 19 to 21, the positioning mold 220 includes a connecting seat 2200, a bottom plate 2201, a guide support column 2202, a positioning body 2203, a guide column 2204 and a reset spring 2205. The connecting seat 2200 is arranged on the rotating disk 211, and two guide holes are arranged on the connecting seat 2200. The two guide support columns 2202 slide through the corresponding guide holes. The positioning body 2203 connects the upper ends of the two guide support columns 2202, and the positioning boss 221 and the limiting edge 222 are arranged on the positioning body 2203; the bottom plate 2201 connects the lower ends of the two guide support columns 2202, and the two guide columns 2204 are arranged at the bottom end of the connecting seat 2200. The lower ends of the guide columns 2204 slide through the bottom plate 2201, and the reset spring 2205 is sleeved on each of the guide columns 2204.

22 to 24, the laser welding device 260 includes a second laser welding machine 261, a mounting seat 262, a mounting plate 263, a rotating gear 264, a cylinder 265, a rack 266, a pressure head 267 and a second lifting mechanism 268. The second laser welding machine 261 is arranged on one side of the frame 100, the mounting seat 262 is arranged on the frame 100, the mounting plate 263 is arranged on the upper end of the mounting seat 262, and the mounting plate 263 is provided with a bearing hole, a countersink and a slide groove, and the slide groove forms a notch on one side of the countersink. The lower end of the rotating gear 264 is provided with a connecting portion, which is rotatably connected to the bearing hole. The rotating gear 264 is located in the counterbore. The rotating gear 264 is arranged in the hole. A pressing connecting portion 269 is extended from the inner side of the inner hole toward the center. The pressure head 267 is arranged at the bottom of the pressing connecting portion 269. The rack 266 is slidably arranged in the slide groove and meshes with the rotating gear 264. The cylinder 265 is arranged on one side of the mounting plate 263 and connected to the rack 266. The second lifting mechanism 268 is arranged at the lower end of the mounting seat 262, and is used to lift the corresponding bottom plate 2201 upward. The mounting plate 263 and the second lifting mechanism 268 are located on the upper and lower sides of the rotating disk 211. Specifically, in this embodiment, when the turntable 211 drives the battery cover to rotate between the second lifting mechanism 268 and the mounting plate 263, when welding the pole, the second lifting mechanism 268 lifts the bottom plate 2201 upward, and the bottom plate 2201 pushes the guide support column 2202 upward, thereby lifting the positioning body 2203 and the battery cover upward, so that the pressure head 267 contacts the pole and presses the pole, so that the sealing ring is compressed, and the pole contacts the battery cover, and then the pole is welded by the second laser welding machine 261, and the edge of the pole is welded to the battery cover, and then during the welding process, the rack 266 is pushed by the cylinder 265, thereby pushing the rotating gear 264 and the downward pressing connection part 269 to rotate, so that the downward pressing connection part 269 rotates and is misaligned with the laser, so that the second laser welding machine 261 can complete the welding of the entire circle of the pole.

Further, referring to FIG. 23 , the second lifting mechanism 268 includes a slide rail 2680, a lifting seat 2681, an elastic pressure piece 2682 and an electric cam mechanism 2683. The two slide rails 2680 are arranged on one side of the mounting seat 262, the lifting seat 2681 is slidably connected to the two slide rails 2680, the elastic pressure piece 2682 is arranged on the lifting seat 2681, and the electric cam mechanism 2683 is arranged at the lower end of the mounting seat 262, and is used to push the lifting seat 2681 to rise. In this embodiment, when welding is required, the lifting seat 2681 is pushed by the electric cam mechanism 2683, so that the elastic pressure piece 2682 contacts the bottom plate 2201, thereby pushing the positioning body 2203 to rise, and the use of the elastic pressure piece 2682 to push the positioning mold can play a buffering and protective role on the battery cover and the pole.

Further, please refer to Figures 19 to 21, the positioning body 2203 includes a mold base 2206 and a positioning seat 2207, the mold base 2206 is provided with a mounting hole, the positioning seat 2207 is slidably arranged in the mounting hole, the upper end of the positioning seat 2207 extends out of the mounting hole to form the positioning boss 221; the positioning boss 221 is provided with a second blind hole which is recessed downward, the second blind hole is provided with a suction nozzle 2208, and the suction nozzle 2208 is connected to the negative pressure system; the lower end of the positioning seat 2207 is higher than the bottom end of the mounting hole, the upper end of the guide support column 2202 extends into the lower end of the mounting hole, and a gap is provided between the guide column support column 2202 and the positioning seat 2207, and a second compression spring 2209 is provided in the guide column support column 2202 to squeeze the positioning seat 2207. In this embodiment, when the pole is assembled with the battery cover by the pole assembly mechanism 240, the pole is sucked by the suction nozzle 2208 to prevent the pole from contacting the sealing ring before welding, thereby preventing the pole from shaking and causing the sealing ring to be misaligned when the turntable 211 rotates. In addition, during the pole welding process, when the pole is pressed down, the suction nozzle 2208 can move downward so that the pole can fit tightly with the sealing ring.

Further, referring to Figure 25, the pole assembly mechanism 240 includes a pole conveying mechanism 241 and a second manipulator 242 arranged on the frame 100; the pole conveying mechanism 241 is used to convey the poles, and the second manipulator 242 is used to pick up the poles on the pole conveying mechanism 241 and assemble them onto the battery cover plate of the positioning mold 220.

26 , the protective cover picking mechanism 250 includes a second vibrating feed tray 251 and a third manipulator 252 , wherein the second vibrating feed tray 251 is used to convey the protective cover, and the third manipulator 252 is used to pick up the protective cover from the second vibrating feed tray 251 and place it on the pole of the battery cover.

Furthermore, the feeding mechanism 290 includes a third manipulator 291 and a secondary positioning mechanism 292, and the secondary positioning mechanism 292 is used to reposition the battery cover.

Further, referring to Figure 27, the secondary positioning mechanism 292 includes a support seat 2920, a positioning cylinder 2921 and a positioning plate 2922. The support seat 2920 is arranged on the frame 100. The support seat 2920 is provided with a positioning cavity with an opening at one end. The positioning cylinder 2921 is provided on the support seat 2920, and the positioning plate 2922 is provided at the telescopic end of the positioning cylinder 2921.

Furthermore, the second transfer mechanism 500 is a belt conveyor mechanism, and the output end of the rotating mechanism 500 is provided with a steering mechanism (not shown in the drawings) for rotating the battery cover by 180°.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. An aluminum shell battery cover assembly machine, characterized in that it includes: a frame, an explosion-proof valve welding device, a first pole assembly machine, a second pole assembly machine, a first transfer mechanism and a second transfer mechanism; the explosion-proof valve welding device, the first pole assembly machine and the second pole assembly machine are arranged on the frame in sequence; the explosion-proof valve welding device is used for explosion-proof valve assembly welding of battery cover; the first pole assembly machine and the second pole assembly machine are used for positive electrode welding and negative electrode welding of battery cover respectively; the first transfer mechanism is arranged between the explosion-proof valve welding device and the first pole assembly machine, and the second transfer mechanism is arranged between the first pole assembly machine and the second pole assembly machine; the first transfer mechanism is used to transfer the battery cover welded by the explosion-proof valve welding device to the first pole assembly machine, and the second transfer mechanism is used to transfer the battery cover welded with the positive pole by the first pole assembly machine to the second pole assembly machine; the positioning molds in the first pole assembly machine and the second pole assembly machine are both provided with positioning bosses for positioning the through holes of the poles to be welded on the battery cover; The explosion-proof valve welding device comprises a dividing turntable arranged on the frame, a plurality of positioning jigs evenly arranged on the edge of the dividing turntable, and a plurality of positioning jigs arranged on the frame in sequence around the dividing turntable: A positioning and loading mechanism, used for picking up the battery cover plate to be welded and positioning it on the positioning jig; An explosion-proof valve assembly mechanism, used to pick up the explosion-proof valve and position it at the explosion-proof welding position of the battery cover; An explosion-proof valve welding mechanism, used for sealingly welding the explosion-proof valve to the battery cover; and A detection and unloading mechanism, used for detecting the air tightness of the battery cover after welding, and transferring the battery cover to the first transfer mechanism; The detection and unloading mechanism includes a second indexing turntable, and a first transfer robot, a leakage detection mechanism, a shaping mechanism, and a second transfer robot arranged in sequence around the second indexing turntable; four groups of lower molds are evenly arranged on the second indexing turntable, and the lower molds are provided with positioning grooves, and the bottom of the positioning grooves is provided with air-avoiding through holes, and the edges of the air-avoiding through holes are provided with sealing rings; The air leakage detection mechanism comprises a second lifting mechanism, a first lifting mechanism, an upper detection mold and a lower pressure block; the second lifting mechanism is arranged on the frame, the upper detection mold is arranged at the lifting end of the second lifting mechanism, a detection hole is arranged in the upper detection mold, the edge of the detection hole is arranged on a sealing ring protruding downward, and the detection hole is connected to a helium mass spectrometer leak detector; the first lifting mechanism is arranged on the frame and located at the bottom end of the second indexing turntable, the lower pressure block is arranged at the upper end of the first lifting mechanism, and the lower pressure block is provided with an air hole connected to the helium mass spectrometer leak detector; the second indexing turntable is provided with an avoidance position to avoid the contact between the lower pressure block and the lower mold; The shaping mechanism comprises a pressing mechanism and a shaping upper die; the shaping upper die is arranged at the lifting end of the pressing mechanism; The frame is also provided with a plurality of support rods, and the upper ends of the support rods are provided with pulleys in contact with the bottom of the second indexing turntable; The first pole assembly machine and the second pole assembly machine are both turntable assembly machines; the turntable assembly machine comprises: An indexing turntable mechanism is provided on the frame and is used to drive the turntable on the indexing turntable mechanism to index and rotate; a positioning mold, a plurality of the positioning molds are equidistantly distributed on the edge of the turntable of the indexing turntable mechanism; the positioning mold is provided with a positioning boss and at least one limiting edge, the positioning boss is used to locate the through hole of the battery cover plate to be welded with the pole, and the limiting edge is used to locate the side edge of the battery cover plate; And, arranged in sequence along the rotation direction of the indexing turntable mechanism are: A feeding mechanism; used for picking up the battery cover and positioning it on the positioning mold; The sealing ring assembly mechanism is used to pick up the sealing ring and position it in the assembly hole of the battery cover; The pole assembly mechanism is used to pick up the pole and position it into the assembly hole of the battery cover; A protective cover picking mechanism is used to pick up the protective cover and cover it on the pole assembled in the battery cover plate; A laser welding device, used to seal and weld the pole into the mounting hole of the battery cover; A protective cover taking manipulator, used for clamping the protective cover on the battery cover; and The unloading robot is used to transfer the battery cover plate with a pole welded thereon to the transfer mechanism. 2. The aluminum shell battery cover assembly machine according to claim 1 is characterized in that: the explosion-proof valve welding device also includes a laser coding mechanism and a flipping mechanism; the laser coding mechanism and the flipping mechanism are located between the positioning and loading mechanism and the explosion-proof valve assembly mechanism; the laser coding mechanism is used to code the outer surface of the battery cover, and the flipping mechanism is used to flip the battery cover so that the battery cover is positioned in the positioning fixture with the reverse side facing up. 3. The aluminum shell battery cover assembly machine according to claim 2 is characterized in that: the flipping mechanism includes a support seat, a lifting cylinder and a rotary pneumatic clamp; the support seat is arranged on the frame, the lifting cylinder is arranged on the support seat, the rotary pneumatic clamp is arranged at the lifting end of the lifting cylinder, and the clamping claws of the rotary pneumatic clamp face the dividing turntable. 4. The aluminum shell battery cover assembly machine according to claim 1 is characterized in that: the number of the explosion-proof valve welding mechanisms is two groups, one group of the explosion-proof valve welding mechanisms is used for spot welding of the explosion-proof valve and the battery cover, and the other explosion-proof valve welding mechanism is used for sealing welding of the explosion-proof valve and the battery cover. 5. The aluminum shell battery cover assembly machine according to any one of claims 1 to 4 is characterized in that: the explosion-proof valve welding mechanism includes a first laser welding machine, a lifting mechanism and a protective pressure plate, the first laser welding machine is arranged on one side of the frame, the lifting mechanism is arranged on the frame, the protective pressure plate is arranged at the lifting end of the lifting mechanism, and is located above the dividing turntable; the lifting mechanism drives the protective pressure plate to be pressed on the upper surface of the battery cover, and the protective pressure plate is provided with an air avoidance hole for avoiding the laser beam of the first laser welding machine. 6. The aluminum shell battery cover plate assembly machine according to any one of claims 1 to 4 is characterized in that: the positioning fixture comprises a fixture body, two positioning pins and a positioning block; the two positioning pins are relatively arranged on the fixture body and extend upward; a positioning mounting hole is provided on the fixture body, and the positioning block is arranged in the positioning mounting hole for positioning the explosion-proof valve to be welded; an air pipe joint connected to the positioning mounting hole is provided on one side of the fixture body for connecting to a negative pressure system, and the positioning block is arranged on an adsorption groove, and the negative pressure system forms a negative pressure on the top of the positioning block. 7. The aluminum shell battery cover assembly machine according to claim 1 is characterized in that: the turntable assembly machine also includes a first CCD detection mechanism and a second CCD detection mechanism, the first CCD detection mechanism is arranged between the sealing ring assembly mechanism and the pole assembly mechanism, and is used to detect the sealing ring assembled on the battery cover; the second CCD detection mechanism is arranged between the protective cover picking mechanism and the laser welding device. 8. The aluminum shell battery cover plate assembly machine according to claim 1, characterized in that: the positioning mold is longitudinally arranged on the turntable, and the center line of the positioning mold in the length direction is arranged along the radial direction of the turntable. 9. The aluminum shell battery cover assembly machine according to any one of claims 1, 7, and 8 is characterized in that: the sealing ring assembly mechanism includes a vibrating feed plate, a conveying track, a first manipulator and a suction mechanism; the vibrating feed plate, the conveying track and the first manipulator are all arranged on the frame, the conveying track is connected to the output end of the vibrating feed plate, a conveying track groove is arranged in the conveying track, a positioning cavity is arranged at the end of the conveying track, and the suction mechanism is arranged at the lifting end of the first manipulator; the first manipulator drives the suction mechanism to extend into the positioning cavity, and sucks the positioning sealing ring onto the battery cover. 10. The aluminum shell battery cover assembly integrated machine according to claim 9 is characterized in that: the suction mechanism comprises a connecting rod, a lower pressing sleeve, a limiting sleeve, a compression spring and a lower pressing power piece; the upper end of the connecting rod is connected to the lifting end of the first manipulator; the lower pressing sleeve sliding sleeve is arranged on the connecting rod; the lower end of the lower pressing sleeve is provided with a step hole, and the upper end is provided with a cavity, one side of the cavity is provided with an air hole, which is connected to the negative pressure system, and the bottom of the cavity is provided with an adsorption hole that passes through to the bottom of the lower pressing sleeve; the lower end of the connecting rod is provided with a positioning part that matches the gap of the step hole, and the compression spring is arranged in the step hole, which is used to squeeze the lower pressing sleeve so that the end of the positioning part extends out of the step hole; the lower pressing power piece is connected to the lower pressing sleeve, which is used to push the lower pressing sleeve downward; the negative pressure system makes the bottom of the lower pressing sleeve produce negative pressure, which is used to absorb the sealing ring; the diameter of the positioning part is smaller than the inner diameter of the sealing ring. 11. The aluminum shell battery cover assembly integrated machine according to claim 10 is characterized in that: a downwardly recessed blind hole is also provided on the positioning boss, and an upwardly protruding positioning platform is provided at the bottom of the blind hole; an extension portion is extended downward from the bottom of the positioning portion, and the diameter of the extension portion is smaller than the diameter of the positioning portion, and a positioning hole is provided at the bottom of the extension portion for positioning and cooperating with the positioning platform. 12. The aluminum shell battery cover assembly machine according to claim 11 is characterized in that: a downwardly concave groove is provided on the top of the positioning platform, a suction nozzle is provided in the groove, the suction nozzle is connected to the negative pressure mechanism, and the suction nozzle is not lower than the groove. 13. The aluminum shell battery cover plate assembly machine according to claim 12, characterized in that: the suction nozzle is connected to an elastic floating part so that the suction nozzle moves downward under pressure. 14. The aluminum shell battery cover assembly machine according to any one of claims 1, 7, and 8, characterized in that: the positioning mold comprises a connecting seat, a bottom plate, a guide support column, a positioning body, a guide column and a reset spring; the connecting seat is arranged on the turntable, the connecting seat is provided with two guide holes, the two guide support columns slide through the corresponding guide holes, the positioning body connects the upper ends of the two guide support columns, the positioning boss and the limiting edge are arranged on the positioning body; the bottom plate connects the lower ends of the two guide support columns, the two guide columns are arranged at the bottom end of the connecting seat, the lower end of the guide column slides through the bottom plate, and each guide column is sleeved with the reset spring; The laser welding device comprises a second laser welding machine, a mounting seat, a mounting plate, a rotating gear, a cylinder, a rack, a pressure head and a second lifting mechanism; the second laser welding machine is arranged on one side of the frame, the mounting seat is arranged on the frame, the mounting plate is arranged on the upper end of the mounting seat, a bearing hole, a countersunk hole and a slide groove are arranged on the mounting plate, and a notch is formed on one side of the countersunk hole; a connecting part is arranged at the lower end of the rotating gear, and the connecting part is rotatably connected with the bearing hole, the rotating gear is located in the countersunk hole, the rotating gear is provided with an inner hole, and a pressing connecting part is extended toward the center from the inner side of the inner hole, and the pressure head is arranged at the bottom of the pressing connecting part; the rack is slidably arranged in the slide groove and meshes with the rotating gear, the cylinder is arranged on one side of the mounting plate and connected to the rack; the second lifting mechanism is arranged at the lower end of the mounting seat, and is used to lift the corresponding bottom plate upward; the mounting plate and the second lifting mechanism are located at the upper and lower sides of the turntable. 15. The aluminum shell battery cover assembly machine according to claim 14 is characterized in that: the second lifting mechanism includes a slide rail, a lifting seat, an elastic pressure piece and an electric cam mechanism; the two slide rails are arranged on one side of the mounting seat, the lifting seat is slidably connected to the two slide rails, the elastic pressure piece is arranged on the lifting seat, and the electric cam mechanism is arranged at the lower end of the mounting seat for pushing the lifting seat to rise. 16. The aluminum shell battery cover assembly machine according to claim 15 is characterized in that: the positioning body includes a mold base and a positioning seat, the mold base is provided with a mounting hole, the positioning seat is slidably arranged in the mounting hole, and the upper end of the positioning seat extends out of the mounting hole to form the positioning boss; the positioning boss is provided with a second blind hole that is recessed downward, and a suction nozzle is provided in the second blind hole, and the suction nozzle is connected to the negative pressure system; the lower end of the positioning seat is higher than the bottom end of the mounting hole, the upper end of the guide support column extends into the lower end of the mounting hole, and a gap is provided between the guide support column and the positioning seat, and a second compression spring for squeezing the positioning seat is provided in the guide support column. 17. The aluminum shell battery cover assembly machine according to claim 1, characterized in that: the pole assembly mechanism comprises a pole conveying mechanism and a second manipulator provided on the frame; the pole conveying mechanism is used to convey poles, and the second manipulator is used to pick up poles on the pole conveying mechanism and assemble them onto the battery cover of the positioning mold; The protective cover picking mechanism includes a second vibrating feeding tray and a third manipulator, wherein the second vibrating feeding tray is used to convey the protective cover, and the third manipulator is used to pick up the protective cover from the second vibrating feeding tray and place it on the pole of the battery cover.