A three-electrode battery cell automatic assembly equipment

Abstract

The invention discloses an automatic assembly device for a three-electrode-lug battery cell, which is sequentially provided with a battery cell feeding mechanism, a negative electrode base pad assembly mechanism, a positive electrode surface pad assembly mechanism, a positive electrode lug welding mechanism and a pin shelling mechanism, wherein the negative electrode base pad assembly mechanism is used for assembling the negative electrode base pad and bending the negative electrode lug of the battery cell, the positive electrode surface pad assembly mechanism is used for assembling the positive electrode surface pad of the battery cell, the positive electrode lug welding mechanism is used for welding three positive electrode lugs of the battery cell together, and the pin shelling mechanism is used for inserting a copper needle into a central hole of the battery cell and loading the battery cell with the copper needle inserted into a steel cylinder. The device can fully automatically assemble positive and negative electrode pads on the battery cell, weld the positive electrode lug, insert the copper needle and load the battery cell into the steel cylinder, thereby realizing fully automatic production, reducing manual operation and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of battery manufacturing, in particular to automatic assembly equipment for three-electrode battery cells. Background Art

[0002] The existing automatic processing devices for battery cells are mainly used to process regular cylindrical battery cells, such as wound battery cells, etc. However, for battery cells with irregular shapes and positive and negative tabs arranged along the axial ends of the battery cells, the existing automatic processing devices for battery cells cannot meet the requirements of automatic processing and production of such battery cells. In addition, when ultrasonically welding multiple positive tabs, workers need to twist the multiple positive tabs together before welding, which requires manual work, cannot achieve automatic production, and has low production efficiency. Summary of the invention

[0003] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide an automatic assembly equipment for three-pole battery cells, which can fully automatically assemble positive and negative electrode gaskets of battery cells, automatically weld three-pole tabs, insert copper needles, and load battery cells into steel cylinders, thereby realizing fully automatic production and improving production efficiency.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An automatic assembly device for three-electrode-tab battery cells, comprising a battery cell feeding mechanism, a negative electrode bottom pad assembly mechanism, a positive electrode surface pad assembly mechanism, a positive electrode tab welding mechanism and a pin shell assembly mechanism, which are arranged in sequence;

[0006] The negative electrode bottom gasket assembly mechanism is used to assemble the negative electrode bottom gasket of the battery cell transferred by the battery cell feeding mechanism, and comprises a negative electrode processing machine and a negative electrode bottom gasket assembly turntable arranged on the negative electrode processing machine, a first driving motor driving the negative electrode bottom gasket assembly turntable to rotate, a first loading and unloading device, a first CCD detection device, a first negative electrode correction device, a second negative electrode correction device, a third negative electrode correction device, a negative electrode rough positioning device, a negative electrode fine positioning device, a second CCD detection device, a negative electrode bottom gasket assembly device, a negative electrode bending device and a plurality of negative electrode processing fixtures arranged on the negative electrode bottom gasket assembly turntable;

[0007] The positive electrode surface pad assembly mechanism is used to assemble the positive electrode surface pads of the battery cell, and includes a positive electrode processing machine and a battery cell turning device arranged on the positive electrode processing machine, a positive electrode surface pad assembly turntable, a second driving motor that drives the positive electrode surface pad assembly turntable to rotate, a second loading and unloading device, a third CCD detection device, a first positive electrode correction device, a second positive electrode correction device, a third positive electrode correction device, a positive electrode rough positioning device, a positive electrode fine positioning device, a positive electrode surface pad assembly device, and a plurality of positive electrode processing fixtures arranged on the positive electrode surface pad assembly turntable;

[0008] The positive tab welding mechanism is used to weld three positive tabs of the battery cells together, and includes a welding machine and a welding turntable arranged on the welding machine, a third driving motor driving the welding turntable to rotate, a third loading and unloading device, a fifth CCD detection device, a first tab twisting device, a second tab twisting device, a first tab pre-positioning device, a positive tab pre-welding device, a third tab twisting device, a fourth tab twisting device, a fifth tab twisting device, a second tab pre-positioning device, a positive tab welding device, and a plurality of welding fixtures arranged on the welding turntable;

[0009] The pin-insertion shell loading mechanism is used to insert the copper pin into the center hole of the battery cell and load the battery cell with the copper pin inserted into the steel cylinder, and comprises a pin-insertion shell loading machine platform and a steel cylinder feeding mechanism, a photoelectric detection device, a pin-insertion device and a shell loading device arranged on the pin-insertion shell loading machine platform;

[0010] As a preferred solution, it also includes a positive and negative electrode ear shaping device for regularizing the positive and negative electrode ears, a negative electrode bottom sheet feeding mechanism and a first streamline, the positive and negative electrode ear shaping device is used to roughly straighten the positive and negative electrode ears of the battery cell, the first streamline is provided with a fixture for placing the battery cell, a plurality of the negative electrode processing fixtures are evenly arranged on the negative electrode bottom pad assembly turntable, and rotate with the negative electrode bottom pad assembly turntable, the negative electrode bottom pad assembly device is used to assemble the negative electrode bottom pad on the negative end surface of the battery cell and make the negative electrode ear pass through the negative electrode bottom The hollow hole on the pad, the negative electrode bending device is used to bend the three negative electrode ears and press them against the negative electrode bottom pad, and the three negative electrode ears all cover the axis of the battery cell, the negative electrode processing fixture is rotatably connected with the negative electrode bottom pad assembly turntable, the first loading and unloading device is used to move the roughly straightened negative electrode of the battery cell upward to the negative electrode processing fixture on the turntable and move the battery cell after the negative electrode sheet in the fixture is bent into the fixture on the first streamline, and the first streamline is used to transfer the battery cell in the fixture to the positive electrode surface pad assembly mechanism.

[0011] As a preferred embodiment, the positive electrode surface pad assembly mechanism also includes a battery cell flipping device, a positive electrode surface pad loading mechanism and a second streamline, the battery cell flipping device is used to flip the positive and negative poles of the battery cell transmitted on the first streamline so that the positive pole of the battery cell faces upward, a plurality of positive electrode processing fixtures are evenly arranged on the positive electrode surface pad assembly turntable and rotate with the positive electrode surface pad assembly turntable, the positive electrode processing fixture is rotatably connected to the positive electrode surface pad assembly turntable, the positive electrode surface pad device is used to assemble the positive electrode surface pad on the positive terminal surface of the battery cell and the positive electrode ear passes through the hollow hole on the positive electrode surface pad, a fixture for placing the battery cell is provided on the second streamline, and the second loading and unloading device is used to transfer the flipped battery cell to the positive electrode processing fixture on the turntable and move the battery cell with the positive electrode surface pad installed into the fixture on the second streamline.

[0012] As a preferred embodiment, the positive electrode ear welding mechanism further includes a third streamline, a fourth CCD detection mechanism and a third NG streamline, the first electrode ear twisting device is used to twist the first positive electrode ear of the battery cell, the second electrode ear twisting device is used to twist the second positive electrode ear of the battery cell to fit with the first positive electrode ear, the third electrode ear twisting device is used to twist the third positive electrode ear of the battery cell away from the fitting position of the first positive electrode ear and the second positive electrode ear, the first electrode ear pre-positioning device is used to align the fitting ends of the first positive electrode ear and the second positive electrode ear up and down, and the positive electrode ear pre-welding device is used to align the first positive electrode ear with the second positive electrode Pole and tab welding, the fourth pole tab twisting device is used to twist the third positive pole tab of the battery cell to the initial position, the fifth pole tab twisting device is used to twist the third positive pole tab of the battery cell to the fitting position of the first positive pole tab and the second positive pole tab, the second pole tab pre-positioning device is used to align the third positive pole tab with the first positive pole tab and the second positive pole tab welding end up and down, the positive pole tab welding device is used to weld the first positive pole tab, the second positive pole tab and the third positive pole tab together, the third loading and unloading device is used to transfer the battery cell in the jig to the welding processing fixture and transfer the battery cell after welding to the third flow line.

[0013] As a preferred solution, the pin-shelling mechanism also includes a copper pin loading mechanism and a fourth streamline, the steel cylinder loading mechanism is used to transfer the steel cylinder from the material frame to the fourth streamline, and make the opening of the steel cylinder face upward, the pin-insertion device is used to insert the copper pin into the center hole of the battery cell, and the shelling device is used to assemble the battery cell with the copper pin inserted into the steel cylinder.

[0014] As a preferred solution, the positive tab welding mechanism includes a loading station, a first tab twisting station, a second tab twisting station, a third tab twisting station, a first regularization station, a pre-welding station, a fourth tab twisting station, a fifth tab twisting station, a second regularization station, an ultrasonic welding station, a CCD detection station and a unloading station which are sequentially arranged on a turntable.

[0015] As a preferred embodiment, the welding fixture includes a first clamping arm, a second clamping arm, a driving cylinder and a first clamping jaw cylinder for clamping the battery cell, the driving cylinder is used to drive the first clamping arm and the second clamping arm to move along the diameter direction of the welding turntable, the first clamping jaw cylinder is used to control the relative opening and closing of the first clamping arm and the second clamping arm, and a clamping assembly is provided at the upper end of the welding fixture, and the clamping assembly includes a third clamping arm and a fourth clamping arm arranged horizontally opposite to each other, and a second clamping jaw cylinder for controlling the relative opening and closing of the third clamping arm and the fourth clamping arm.

[0016] As a preferred solution, the first pole lug twisting device comprises a first clamping arm and a second clamping arm which are arranged horizontally opposite to each other, and a third clamping jaw cylinder for controlling the relative opening and closing of the first clamping arm and the second clamping arm.

[0017] As a preferred solution, the first pole ear pre-positioning device includes a front top block, a rear top block, a left fixed block, a right top block, an upper top block, a first clamping claw cylinder and a second clamping claw cylinder, the first clamping claw cylinder is used to control the relative opening and closing of the front top block and the rear top block, the second clamping claw cylinder is used to control the relative opening and closing of the left top block and the right top block, and the front top block, the rear top block, the left fixed block and the right top block are arranged at the same height.

[0018] As a preferred solution, the pin loading mechanism also includes a pin insertion station, a third NG streamline and an NG unloading device. The third streamline is provided with a fixture for fixing the steel cylinder. The steel cylinder loading mechanism is used to transfer the steel cylinder in the material box to the fixture of the third streamline, and the opening of the steel cylinder faces upward. The NG unloading device is arranged on the side of the third streamline.

[0019] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it mainly comprises a battery cell feeding mechanism, a negative electrode base pad assembly mechanism, a positive electrode surface pad assembly mechanism, a positive electrode ear welding mechanism and a pin shell installation mechanism which are arranged in sequence. Among them, the negative electrode base pad assembly mechanism is used for assembling the negative electrode base pad and bending the negative electrode ear of the battery cell, the positive electrode surface pad assembly mechanism is used for assembling the positive electrode surface pad of the battery cell, the positive electrode ear welding mechanism is used for welding three positive electrode ears of the battery cell together, and the pin shell installation mechanism is used for inserting the copper needle into the center hole of the battery cell and loading the battery cell with the copper needle inserted into the steel cylinder. It can fully automatically assemble the positive and negative electrode gaskets on the battery cell, weld the positive electrode ear, insert the copper needle and load the battery cell into the steel cylinder, thereby realizing fully automatic production, reducing manual operation and improving production efficiency.

[0020] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly structure of an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of a battery cell feeding mechanism according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the negative electrode base gasket assembly mechanism of an embodiment of the present invention;

[0024] Figure 4 is a top view of the negative electrode base gasket assembly mechanism of an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the positive electrode surface pad assembly mechanism of an embodiment of the present invention;

[0026] Figure 6 is a top view of the positive electrode surface pad assembly mechanism of an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the positive electrode ear welding mechanism according to an embodiment of the present invention;

[0028] Figure 8 is a top view of a positive electrode ear welding mechanism according to an embodiment of the present invention;

[0029] Fig. 9 Schematic diagram of the welding fixture structure of an embodiment of the present invention;

[0030] Fig.10 1 is a schematic structural diagram of a first tab twisting device according to an embodiment of the present invention;

[0031] Fig.11 1 is a schematic structural diagram of a first tab pre-positioning device according to an embodiment of the present invention;

[0032] Fig.12 It is a schematic diagram of the structure of the pin-loading mechanism of an embodiment of the present invention;

[0033] Fig.13 is a top view of the pin housing mechanism of an embodiment of the present invention;

[0034] Fig.14 Schematic diagram of the battery structure of an embodiment of the present invention;

[0035] Fig.15 It is a schematic diagram of the positive electrode surface pad / negative electrode bottom pad structure of an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 100. Battery cell feeding mechanism; 101. Three-axis manipulator;

[0038] 200, negative electrode bottom gasket assembly mechanism; 201, negative electrode processing machine; 202, negative electrode bottom gasket assembly turntable; 203, first loading and unloading device; 204, first CCD detection device; 205, first negative electrode correction device; 206, second negative electrode correction device; 207, third negative electrode correction device; 208, negative electrode rough positioning device; 209, negative electrode fine positioning device; 210, second CCD detection device; 211, negative electrode bottom gasket assembly device; 212, negative electrode bending device; 213, negative electrode processing fixture; 214, positive and negative electrode ear shaping device; 215, negative electrode bottom film loading mechanism; 216, first streamline; 217, first NG streamline;

[0039] 300, positive electrode surface pad assembly mechanism; 301, positive electrode processing machine; 302, battery cell turning device; 303, positive electrode surface pad assembly turntable; 304, second loading and unloading device; 305, third CCD detection device; 306, first positive electrode correction device; 307, second positive electrode correction device; 308, third positive electrode correction device; 309, positive electrode rough positioning device; 310, positive electrode fine positioning device; 311, positive electrode surface pad assembly device; 312, positive electrode processing fixture; 313, positive electrode surface pad loading mechanism; 314, second streamline;

[0040] 400, positive pole ear welding mechanism; 401, welding machine; 402, welding turntable; 403, third loading and unloading device; 404, fifth CCD detection device; 405, first pole ear twisting device; 406, second pole ear twisting device; 407, first pole ear pre-positioning device; 408, positive pole ear pre-welding device; 409, third pole ear twisting device; 410, fourth pole ear twisting device; 411, fifth pole ear twisting device; 412, second pole ear pre-positioning device; 413, positive pole ear welding device; 415, third streamline; 416, first Four CCD detection mechanisms; 417, second NG streamline; 420, welding fixture; 421, first clamp arm; 422, second clamp arm; 423, first clamp jaw cylinder; 424, clamping assembly; 425, third clamp arm; 426, fourth clamp arm; 427, second clamp jaw cylinder; 428, first clamp block; 429, second clamp block; 430, third clamp jaw cylinder; 431, front top block; 432, rear top block; 433, left fixed block; 434, right top block; 435, upper top block; 436, fourth clamp jaw cylinder; 437, fifth clamp jaw cylinder;

[0041] 500. Pin insertion and shell loading mechanism; 501. Pin insertion and shell loading machine; 502. Steel drum feeding mechanism; 503. Photoelectric detection device; 504. Pin insertion device; 505. Shell loading device; 506. Copper needle feeding mechanism; 507. Fourth streamline; 508. Third NG streamline; 509. NG unloading device; 510. Pin insertion station; 511. Steel drum belt line. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0044] See also Figures 1 to 15 The embodiment of the present invention provides a three-electrode-tab battery cell automatic assembly device, which includes a battery cell feeding mechanism 100, a negative electrode bottom pad assembly mechanism 200, a positive electrode surface pad assembly mechanism 300, a positive electrode tab welding mechanism 400 and a pin shell assembly mechanism 500 which are arranged in sequence;

[0045] The negative electrode pad assembly mechanism 200 is used to assemble the negative electrode pads of the battery cells transferred from the battery cell feeding mechanism 100, and includes a negative electrode processing machine 201 and a negative electrode pad assembly turntable 202 arranged on the negative electrode processing machine 201, a first driving motor for driving the negative electrode pad assembly turntable 202 to rotate, a first loading and unloading device 203, a first CCD detection device 204, a first negative electrode correction device 205, a second negative electrode correction device 206, a third negative electrode correction device 207, a negative electrode rough positioning device 208, a negative electrode fine positioning device 209, a second CCD detection device 210, and an assembly device 211. A negative electrode base gasket device 211, a negative electrode bending device 212 and a plurality of negative electrode processing fixtures 213 arranged on the negative electrode base gasket assembly turntable 202; the first loading and unloading device 203, the first CCD detection device 204, the first negative electrode correction device 205, the second negative electrode correction device 206, the third negative electrode correction device 207, the negative electrode rough positioning device 208, the negative electrode fine positioning device 209, the negative electrode base gasket assembly device 211 and the negative electrode bending device 212 are uniformly arranged in a circle around the base gasket assembly turntable in sequence, and the second CCD detection device 210 is arranged above the negative electrode bending device 212;

[0046] The positive electrode pad assembly mechanism 300 is used to assemble the positive electrode pads of the battery cell, and includes a positive electrode processing machine 301 and a battery cell flipping device 302 arranged on the positive electrode processing machine 301, a positive electrode pad assembly turntable 303, a second driving motor for driving the positive electrode pad assembly turntable 303 to rotate, a second loading and unloading device 304, a third CCD detection device 305, a first positive electrode correction device 306, a second positive electrode correction device 307, a third positive electrode correction device 308, and a positive electrode rough positioning device 309. , a positive electrode fine positioning device 310, a positive electrode surface pad assembly device 311 and a plurality of positive electrode processing fixtures 312 arranged on the positive electrode surface pad assembly turntable 303, the second loading and unloading device 304, the third CCD detection device 305, the first positive electrode correction device 306, the second positive electrode correction device 307, the third positive electrode correction device 308, the positive electrode rough positioning device 309, the positive electrode fine positioning device 310 and the positive electrode surface pad assembly device 311 are uniformly arranged in a circle around the positive electrode surface pad assembly turntable 303 in sequence;

[0047] The positive tab welding mechanism 400 is used to weld three positive tabs of the battery cell together, and includes a welding machine 401 and a welding turntable 402 arranged on the welding machine 401, a third driving motor for driving the welding turntable 402 to rotate, a third loading and unloading device 403, a fifth CCD detection device 404, a first tab twisting device 405, a second tab twisting device 406, a first tab pre-positioning device 407, a positive tab pre-welding device 408, a third tab twisting device 409, a fourth tab twisting device 410, a fifth tab twisting device 411, a second tab pre-positioning device 412, a positive tab welding device The third loading and unloading device 403 includes a welding loading device and a welding unloading device, wherein the welding loading device, the first pole ear twisting device 405, the second pole ear twisting device 406, the third pole ear twisting device 409, the first pole ear pre-positioning device 407, the positive pole ear pre-welding device 408, the fourth pole ear twisting device 410, the fifth pole ear twisting device 411, the second pole ear pre-positioning device 412, the positive pole ear welding device 413, the fifth CCD detection device 404 and the welding unloading device are uniformly arranged in a circle around the welding turntable 402 in sequence;

[0048] The pin-insertion shell loading mechanism 500 is used to insert the copper pin into the battery cell and load the battery cell with the copper pin inserted into the steel cylinder, and comprises a pin-insertion shell loading machine platform 501 and a steel cylinder feeding mechanism 502, a photoelectric detection device 503, a pin-insertion device 504 and a shell loading device 505 arranged on the pin-insertion shell loading machine platform 501;

[0049] In this embodiment, the negative electrode base gasket assembly mechanism 200 also includes a positive and negative electrode ear shaping device 214 for regularizing the positive and negative electrode ears, a negative electrode bottom sheet feeding mechanism 215, a first NG streamline 217 and a first streamline 216, wherein the positive and negative electrode ear shaping device 214 is used to roughly straighten the positive and negative electrode ears of the battery cell so that the positive and negative electrode ears do not extend out of the circumference of the battery cell, and a fixture for placing the battery cell is provided on the first streamline 216. A plurality of the negative electrode processing fixtures 213 are evenly arranged on the negative electrode base gasket assembly turntable 202 and rotate with the negative electrode base gasket assembly turntable 202. The negative electrode base gasket assembly device 211 is used to assemble the negative electrode base gasket on The negative electrode tabs are placed on the negative end surface of the battery cell and the negative electrode tabs are passed through the hollow holes on the negative electrode base pad. The negative electrode bending device 212 is used to bend the three negative electrode tabs and press them against the negative electrode base pad, and the three negative electrode tabs are all covered on the axis of the battery cell. The negative electrode processing fixture 213 is rotatably connected to the negative electrode base pad assembly turntable 202. The first loading and unloading device 203 is used to move the roughly straightened negative electrode of the battery cell upward into the negative electrode processing fixture 213 on the turntable and move the battery cell after the negative electrode sheet in the fixture is bent into the fixture on the first streamline 216. The first streamline 216 is used to transfer the battery cell in the fixture to the positive electrode surface pad assembly mechanism 300.

[0050] The positive electrode surface pad assembly mechanism 300 also includes a positive electrode surface pad loading mechanism 313 and a second streamline 314. The battery cell flipping device 302 is used to flip the positive and negative electrodes of the battery cell transmitted on the first streamline 216 so that the positive electrode of the battery cell faces upward. A plurality of positive electrode processing fixtures 312 are evenly arranged on the positive electrode surface pad assembly turntable 303 and rotate with the positive electrode surface pad assembly turntable 303. The positive electrode processing fixture 312 is rotatably connected to the positive electrode surface pad assembly turntable 303. The positive electrode surface pad assembly device 311 is used to assemble the positive electrode surface pad on the positive terminal surface of the battery cell and the positive electrode ear passes through the hollow hole on the positive electrode surface pad. A fixture for placing the battery cell is provided on the second streamline 314. The second loading and unloading device 304 is used to transfer the flipped battery cell to the positive electrode processing fixture 312 on the turntable and move the battery cell with the positive electrode surface pad installed into the fixture on the second streamline 314.

[0051] The positive electrode ear welding mechanism 400 also includes a third streamline 415, a fourth CCD detection mechanism 416 and a second NG streamline 417, the first electrode ear twisting device 405 is used to twist the first positive electrode ear of the battery cell, the second electrode ear twisting device 406 is used to twist the second positive electrode ear of the battery cell to fit it with the first positive electrode ear, the third electrode ear twisting device 409 is used to twist the third positive electrode ear of the battery cell away from the fitting position of the first positive electrode ear and the second positive electrode ear, the first electrode ear pre-positioning device 407 is used to align the fitting ends of the first positive electrode ear and the second positive electrode ear, and the positive electrode ear pre-welding device 408 is used to align the first positive electrode ear with the second positive electrode. Pole and tab welding, the fourth pole tab twisting device 410 is used to twist the third positive pole tab of the battery cell to the initial position, the fifth pole tab twisting device 411 is used to twist the third positive pole tab of the battery cell to the fitting position of the first positive pole tab and the second positive pole tab, the second pole tab pre-positioning device 412 is used to align the third positive pole tab with the welding ends of the first positive pole tab and the second positive pole tab, the positive pole tab welding device 413 is used to weld the first positive pole tab, the second positive pole tab and the third positive pole tab together, the third loading and unloading device 403 is used to transfer the battery cell in the jig to the welding processing fixture and transfer the battery cell after welding to the third streamline 415.

[0052] The pin-insertion shell loading mechanism 500 also includes a copper pin loading mechanism 506 and a fourth streamline 507. The steel cylinder loading mechanism 502 is used to transfer the steel cylinder from the material frame to the fourth streamline 507, and make the opening of the steel cylinder face upward. The pin-insertion device 504 is used to insert the copper pin into the center hole of the battery cell. The shell loading device 505 is used to assemble the battery cell with the copper pin inserted into the steel cylinder.

[0053] The positive pole ear welding mechanism 400 includes a loading station, a first pole ear twisting station, a second pole ear twisting station, a third pole ear twisting station, a first regularization station, a pre-welding station, a fourth pole ear twisting station, a fifth pole ear twisting station, a second regularization station, an ultrasonic welding station, a CCD detection station and a unloading station which are sequentially arranged on a turntable. The third driving motor is used to drive the welding turntable 402 to rotate and drive the battery cells in the welding fixture 420 to pass through the above-mentioned stations in sequence. The third loading and unloading device 403 is arranged beside the loading station.

[0054] The welding fixture 420 includes a first clamping arm 421, a second clamping arm 422, a driving cylinder and a first clamping jaw cylinder 423 for clamping the battery cell. The driving cylinder is used to drive the first clamping arm 421 and the second clamping arm 422 to move along the diameter direction of the welding turntable 402. The second clamping jaw cylinder 427 is used to control the relative opening and closing of the first clamping arm 421 and the second clamping arm 422. The upper end of the welding fixture 420 is provided with a clamping assembly 424, and the clamping assembly 424 includes a third clamping arm 425 and a fourth clamping arm 426 that are horizontally arranged relative to each other, and a second clamping jaw cylinder 427 for controlling the relative opening and closing of the third clamping arm 425 and the fourth clamping arm 426.

[0055] The first pole lug twisting device 405 includes a first clamping block 428 and a second clamping block 429 which are horizontally arranged opposite to each other, and a third clamping jaw cylinder 430 for controlling the relative opening and closing of the first clamping block 428 and the second clamping block 429. The second pole lug twisting device 406, the third pole lug twisting device 409, the fourth pole lug twisting device 410 and the fifth pole lug twisting device 411 have the same structure as the first pole lug twisting device 405.

[0056] The first pole ear pre-positioning device 407 includes a front top block 431, a rear top block 432, a left fixed block 433, a right top block 434, an upper top block 435, a fourth clamping jaw cylinder 436 and a fifth clamping jaw cylinder 437. The fourth clamping jaw cylinder 436 is used to control the relative opening and closing of the front top block 431 and the rear top block 432, and the fifth clamping jaw cylinder 437 is used to control the relative opening and closing of the left top block and the right top block 434. The front top block 431, the rear top block 432, the left fixed block 433 and the right top block 434 are arranged at the same height, and the second pole ear pre-positioning device 412 has the same structure as the first pole ear pre-positioning device 407.

[0057] The pin shell loading mechanism 500 also includes a pin insertion station 510, a third NG streamline 508 and an NG unloading device 509. The third streamline 415 is provided with a fixture for fixing the steel cylinder. The steel cylinder loading mechanism 502 is used to transfer the steel cylinder in the material box to the fixture of the third streamline 415, and the opening of the steel cylinder faces upward. The NG unloading device 509 is arranged on the side of the third streamline 415.

[0058] The working process is as follows:

[0059] The battery cells of this equipment are fed by TRAY trays, which are delivered by belt lines. After the three-axis manipulator takes out the battery cells from the TRAY tray, the positive and negative pole ears are shaped by the positive and negative pole ear shaping device 214 at the pole ear shaping station, and then the negative pole of the battery cell is placed into the negative pole processing fixture 213 with the negative pole facing upwards by the first loading and unloading device 203. After that, driven by the negative pole bottom pad assembly turntable 202, the first CCD detection device 204 determines the position and direction of the three negative pole ears of the battery cell, and then the first negative pole correction device 205, the second negative pole correction device 206, and the third negative pole correction device 207 are used in sequence. The positive device 207, the negative electrode rough positioning device 208 and the negative electrode fine positioning device 209 position the three negative electrode ears of the battery cell to a fixed position, and after the second CCD detection device 210 detects the positions of the three negative electrode ears, the negative electrode bottom pad is sucked out from the pad material bin, detected by the CCD detection device, and compared with the CCD detection results of the three negative electrode ears. The negative electrode bottom film suction head is shifted by X / Y and rotated by R angle to make the notch on the negative electrode bottom film correspond to the position of the three negative electrode ears. Then the suction head Z axis descends, the gasket is inserted between the three negative electrode ears, and the negative electrode bottom film is pushed into the negative end of the battery cell. After entering the next station, the push rod of the negative electrode bending device 212 bends the three negative electrode ears, and ensures that the three bent pole ears can cover the hole in the center of the battery cell. Finally, the first loading and unloading device 203 takes out the battery cell, puts it into the fixture of the first streamline 216, and transfers it to the positive electrode surface pad assembly mechanism 300.

[0060] The cell flipping device 302 removes the cell transferred upward from the first flow line, flips it, and puts it into the fixture of the second flow line 314. At this time, the positive ear of the cell faces upward. The second loading and unloading device 304 removes the battery cell on the second streamline 314 and places it into the positive electrode processing fixture 312. The third CCD detection device 305 determines the position and direction of the three positive ears of the battery cell. Driven by the positive electrode surface pad assembly turntable 303, the three positive ears of the battery cell are positioned at fixed positions in sequence by the first positive electrode correction device 306, the second positive electrode correction device 307, the third positive electrode correction device 308, the positive electrode coarse positioning device 309, the positive electrode fine positioning device 310, and the positive electrode surface pad assembly device 311. After the second CCD detection device 210 detects the positions of the three positive ears, the positive electrode surface pad is sucked out from the gasket silo, detected by the CCD detection device, and compared with the CCD detection results of the three positive ears. The positive electrode surface sheet suction head is shifted by X / Y and rotated by R angle to make the notch on the positive electrode surface pad correspond to the positions of the three positive ears. Then the suction head descends in the Z axis, inserts the positive electrode pad between the three positive electrode ears, and pushes the positive electrode pad into the positive end of the battery cell. Finally, the battery cell is taken out by the second loading and unloading device 304, and the positive electrode ear of the battery cell is placed upward into the fixture of the second streamline 314, and transferred to the positive electrode ear welding mechanism 400.

[0061] Afterwards, the third loading and unloading device 403 removes the battery cell on the second streamline 314 and places it into the welding fixture 420 of the loading station, and the fourth CCD detection mechanism 416 detects and determines the direction of the three positive pole ears of the battery cell. Driven by the welding turntable 402, the battery cell enters the first pole ear twisting station, the second pole ear twisting station and the third pole ear twisting station in sequence, and the first pole ear twisting device 405 and the second pole ear twisting device 406 twist the first positive pole ear and the second positive pole ear respectively, so that the first positive pole ear and the second positive pole ear are attached together, and the third pole ear twisting device 409 folds the third positive pole ear to one side so that it does not interfere with the pre-welding of the first positive pole ear and the second positive pole ear. After entering the first regularization station, the first pole ear pre-positioning device 407 aligns the first positive pole ear and the second positive pole ear left and right, up and down, and allows them to be maintained. After entering the pre-welding station, the first positive pole ear and the second positive pole ear are clamped by the first pole ear pre-positioning device 407 to ensure that the pole ear of the previous step is regular and not deformed, and ultrasonic pre-welding is performed to bond the first positive pole ear and the second positive pole ear together first. After entering the fourth pole ear twisting station, the third positive pole ear is folded back to its original position by the fourth pole ear twisting device 410. After entering the fifth pole ear twisting station, the three positive pole ears are twisted and fitted together by the fifth pole ear twisting device 411. After entering the second regularization station, the second pole ear pre-positioning device 412 aligns the third positive pole ear with the first positive pole ear and the second positive pole ear left and right, up and down, and enables it to be maintained. After entering the ultrasonic welding station, the three positive pole ears are clamped by the second pole ear pre-positioning device 412 to ensure that the pole ear of the previous step is regular and not deformed, and ultrasonic welding is performed to weld the three positive pole ears together. After entering the CCD detection station, the fifth CCD detection device 404 detects the welding effect. After entering the unloading station, the third unloading and loading device 403 takes the battery cell out of the fixture and puts it on the third assembly line.

[0062] The steel cylinder is placed in the material box for incoming materials. The box filled with steel cylinders is placed from one end of the belt circulation line. After the box is positioned, a set of three-axis grasping mechanisms takes the steel cylinder out of the material box and puts it on the steel cylinder belt line 511. After the steel cylinder at the front end of the steel cylinder belt line 511 is grasped, it is turned over so that the opening of the steel cylinder faces upward, and is placed on the fourth flow line 507, and the steel cylinder is positioned. The battery cell taken out from the third flow line 415 is grasped by the three-axis manipulator and placed in the needle loading station. The copper needle is taken out by the copper needle feeding mechanism 506 and inserted into the center hole of the battery cell. The battery cell with the copper needle inserted is then grasped by the three-axis manipulator and placed in the positioned steel cylinder on the fourth flow line 507. If the battery cell cannot be placed in, it is detected by the photoelectric sensor, and the battery cell and steel cylinder are taken out and placed on the NG flow line. Qualified products continue to flow out from the fourth flow line 507.

[0063] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it mainly comprises a battery cell feeding mechanism, a negative electrode base pad assembly mechanism, a positive electrode surface pad assembly mechanism, a positive electrode ear welding mechanism and a pin shell installation mechanism which are arranged in sequence. Among them, the negative electrode base pad assembly mechanism is used for assembling the negative electrode base pad and bending the negative electrode ear of the battery cell, the positive electrode surface pad assembly mechanism is used for assembling the positive electrode surface pad of the battery cell, the positive electrode ear welding mechanism is used for welding three positive electrode ears of the battery cell together, and the pin shell installation mechanism is used for inserting the copper needle into the center hole of the battery cell and loading the battery cell with the copper needle inserted into the steel cylinder. It can fully automatically assemble the positive and negative electrode gaskets on the battery cell, weld the positive electrode ear, insert the copper needle and load the battery cell into the steel cylinder, thereby realizing fully automatic production, reducing manual operation and improving production efficiency.

[0064] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-electrode battery cell automatic assembly equipment, characterized in that: It includes a battery cell feeding mechanism, a negative electrode bottom pad assembly mechanism, a positive electrode surface pad assembly mechanism, a positive electrode ear welding mechanism and a pin shell assembly mechanism which are arranged in sequence; The negative electrode bottom gasket assembly mechanism is used to assemble the negative electrode bottom gasket of the battery cell transferred by the battery cell feeding mechanism, and comprises a negative electrode processing machine and a negative electrode bottom gasket assembly turntable arranged on the negative electrode processing machine, a first driving motor driving the negative electrode bottom gasket assembly turntable to rotate, a first loading and unloading device, a first CCD detection device, a first negative electrode correction device, a second negative electrode correction device, a third negative electrode correction device, a negative electrode rough positioning device, a negative electrode fine positioning device, a second CCD detection device, a negative electrode bottom gasket assembly device, a negative electrode bending device and a plurality of negative electrode processing fixtures arranged on the negative electrode bottom gasket assembly turntable; The positive electrode surface pad assembly mechanism is used to assemble the positive electrode surface pads of the battery cell, and includes a positive electrode processing machine and a battery cell turning device arranged on the positive electrode processing machine, a positive electrode surface pad assembly turntable, a second driving motor that drives the positive electrode surface pad assembly turntable to rotate, a second loading and unloading device, a third CCD detection device, a first positive electrode correction device, a second positive electrode correction device, a third positive electrode correction device, a positive electrode rough positioning device, a positive electrode fine positioning device, a positive electrode surface pad assembly device, and a plurality of positive electrode processing fixtures arranged on the positive electrode surface pad assembly turntable; The positive tab welding mechanism is used to weld three positive tabs of the battery cells together, and includes a welding machine and a welding turntable arranged on the welding machine, a third driving motor driving the welding turntable to rotate, a third loading and unloading device, a fifth CCD detection device, a first tab twisting device, a second tab twisting device, a first tab pre-positioning device, a positive tab pre-welding device, a third tab twisting device, a fourth tab twisting device, a fifth tab twisting device, a second tab pre-positioning device, a positive tab welding device, and a plurality of welding fixtures arranged on the welding turntable; The pin-insertion shell loading mechanism is used to insert the copper pin into the battery cell and load the battery cell with the copper pin inserted into the steel cylinder, and comprises a pin-insertion shell loading machine platform and a steel cylinder feeding mechanism, a photoelectric detection device, a pin-insertion device and a shell loading device arranged on the pin-insertion shell loading machine platform; The positive pole ear welding mechanism also includes a third streamline, a fourth CCD detection mechanism and a third NG streamline, the first pole ear twisting device is used to twist the first positive pole ear of the battery cell, the second pole ear twisting device is used to twist the second positive pole ear of the battery cell to fit it with the first positive pole ear, the third pole ear twisting device is used to twist the third positive pole ear of the battery cell away from the fitting position of the first positive pole ear and the second positive pole ear, the first pole ear pre-positioning device is used to align the fitting ends of the first positive pole ear and the second positive pole ear up and down, and the positive pole ear pre-welding device is used to weld the first positive pole ear to the second positive pole ear Then, the fourth pole ear twisting device is used to twist the third positive pole ear of the battery cell to the initial position, the fifth pole ear twisting device is used to twist the third positive pole ear of the battery cell to the fitting position of the first positive pole ear and the second positive pole ear, the second pole ear pre-positioning device is used to align the third positive pole ear with the welding ends of the first positive pole ear and the second positive pole ear up and down, the positive pole ear welding device is used to weld the first positive pole ear, the second positive pole ear and the third positive pole ear together, and the third loading and unloading device is used to transfer the battery cell in the jig to the welding processing fixture and transfer the battery cell after welding to the third flow line.

2. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: It also includes a positive and negative electrode ear shaping device for regularizing the positive and negative electrode ears, a negative electrode bottom sheet feeding mechanism and a first streamline, the positive and negative electrode ear shaping device is used to roughly straighten the positive and negative electrode ears of the battery cell, a fixture for placing the battery cell is provided on the first streamline, a plurality of the negative electrode processing fixtures are evenly arranged on the negative electrode bottom pad assembly turntable, and rotate with the negative electrode bottom pad assembly turntable, the negative electrode bottom pad assembly device is used to assemble the negative electrode bottom pad on the negative end surface of the battery cell and make the negative electrode ear pass through the hollow on the negative electrode bottom pad The negative electrode bending device is used to bend the three negative electrode ears and press them against the negative electrode base pad, and the three negative electrode ears all cover the axis of the battery cell. The negative electrode processing fixture is rotatably connected to the negative electrode base pad assembly turntable. The first loading and unloading device is used to transfer the roughly straightened negative electrode of the battery cell upward to the negative electrode processing fixture on the turntable and to move the battery cell after the negative electrode sheet in the fixture is bent into the fixture on the first streamline. The first streamline is used to transfer the battery cell in the fixture to the positive electrode surface pad assembly mechanism.

3. The automatic assembly equipment for three-electrode battery cells according to claim 2, characterized in that: The positive electrode surface pad assembly mechanism also includes a battery cell flipping device, a positive electrode surface pad loading mechanism and a second streamline, the battery cell flipping device is used to flip the positive and negative poles of the battery cell transmitted on the first streamline so that the positive pole of the battery cell faces upward, a plurality of positive electrode processing fixtures are evenly arranged on the positive electrode surface pad assembly turntable and rotate with the positive electrode surface pad assembly turntable, the positive electrode processing fixture is rotatably connected to the positive electrode surface pad assembly turntable, the positive electrode surface pad device is used to assemble the positive electrode surface pad on the positive terminal surface of the battery cell and the positive electrode ear passes through the hollow hole on the positive electrode surface pad, a fixture for placing the battery cell is provided on the second streamline, and the second loading and unloading device is used to transfer the flipped battery cell to the positive electrode processing fixture on the turntable and move the battery cell with the positive electrode surface pad installed into the fixture on the second streamline.

4. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: The pin-insertion shell loading mechanism also includes a copper pin loading mechanism and a fourth streamline. The steel cylinder loading mechanism is used to transfer the steel cylinder from the material frame to the fourth streamline, and make the opening of the steel cylinder face upward. The pin-insertion device is used to insert the copper pin into the center hole of the battery cell. The shell loading device is used to assemble the battery cell with the copper pin inserted into the steel cylinder.

5. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: The positive tab welding mechanism includes a loading station, a first tab twisting station, a second tab twisting station, a third tab twisting station, a first regularization station, a pre-welding station, a fourth tab twisting station, a fifth tab twisting station, a second regularization station, an ultrasonic welding station, a CCD detection station and a unloading station which are sequentially arranged on a turntable.

6. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: The welding fixture includes a first clamping arm, a second clamping arm, a driving cylinder and a first clamping jaw cylinder for clamping the battery cell, the driving cylinder is used to drive the first clamping arm and the second clamping arm to move along the diameter direction of the welding turntable, the first clamping jaw cylinder is used to control the relative opening and closing of the first clamping arm and the second clamping arm, and a clamping assembly is provided at the upper end of the welding fixture, the clamping assembly includes a third clamping arm and a fourth clamping arm arranged horizontally opposite to each other, and a second clamping jaw cylinder for controlling the relative opening and closing of the third clamping arm and the fourth clamping arm.

7. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: The first pole lug twisting device comprises a first clamping arm and a second clamping arm which are arranged horizontally opposite to each other, and a third clamping jaw cylinder for controlling the relative opening and closing of the first clamping arm and the second clamping arm.

8. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: The first pole ear pre-positioning device includes a front top block, a rear top block, a left fixed block, a right top block, an upper top block, a first clamping claw cylinder and a second clamping claw cylinder. The first clamping claw cylinder is used to control the relative opening and closing of the front top block and the rear top block, and the second clamping claw cylinder is used to control the relative opening and closing of the left top block and the right top block. The front top block, the rear top block, the left fixed block and the right top block are arranged at the same height.

9. The automatic assembly equipment for three-electrode battery cells according to claim 1, characterized in that: The pin shell loading mechanism also includes a pin insertion station, a third NG streamline and an NG unloading device. The third streamline is provided with a fixture for fixing the steel cylinder. The steel cylinder loading mechanism is used to transfer the steel cylinder in the material box to the fixture of the third streamline, and the opening of the steel cylinder faces upward. The NG unloading device is arranged on the side of the third streamline.

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