Liquid injection packaging equipment for soft package lithium battery core

Abstract

The invention discloses liquid injection packaging equipment for a soft package lithium battery cell. The equipment is provided with a feeding drawstring, a four-axis feeding robot, a feeding truss manipulator, a front overturning platform, a front code scanning platform, a front weighing platform, a front NG sorting platform, a front cache platform, a clamp platform, a clamp conveying line, a clamp return line, a flaring mechanism, a liquid injection mechanism, a standing mechanism, a heat sealing mechanism, a discharging truss manipulator, a rear cache platform and a rear code scanning platform. The device comprises a rear weighing platform, a rear NG sorting platform, a rear overturning platform, a discharging truss manipulator, a charging tray carrying manipulator, an empty charging tray feeding conveying line and a full charging tray conveying line. A secondary flaring mechanism before liquid injection is further designed, liquid injection openings of the soft package battery cells can be opened firstly, liquid injection and bag opening are separated, opening of separated air bags of the battery cells one by one during liquid injection is not needed, batch liquid injection is performed after batch bag opening, and the equipment production efficiency is higher.

Description

Technical Field

[0001] This invention relates to equipment for producing pouch lithium-ion batteries, and particularly to equipment for liquid injection and packaging of pouch lithium-ion batteries. Background Technology

[0002] The production process of pouch cells requires electrolyte injection, which is the process of injecting electrolyte into the cell before packaging, so that the electrolyte provides a carrier for ion transport within the cell. The electrolyte injection process for pouch cells includes steps such as opening the bag, injecting electrolyte, settling, and heat sealing. Existing electrolyte injection processes generally set up corresponding processing equipment for the above-mentioned processing steps, and use manual and semi-automatic processing methods for processing, which is not efficient and requires a large area of ​​space. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a liquid injection packaging device for soft-pack lithium battery cells.

[0004] The objective of this invention is achieved through the following technical solution: a soft-pack lithium battery cell liquid injection and packaging equipment, which includes two parallel feeding belts, a four-axis loading robot, a loading gantry robot, a front flipping platform, a front scanning platform, a front weighing platform, a front NG sorting platform, a front buffer platform, a clamping platform, a clamping conveyor line, a clamping return line, a flaring mechanism, a liquid injection mechanism, a settling mechanism, a heat sealing mechanism, a unloading gantry robot, a rear buffer platform, a rear scanning platform, a rear weighing platform, a rear NG sorting platform, a rear flipping platform, a discharge gantry robot, a tray handling robot, an empty tray feeding conveyor line, and a full tray feeding conveyor line; the four-axis loading robot picks up two battery cells at a time from the two feeding belts and places the battery cells on the front flipping platform, flipping the air bags of the battery cells from horizontal to an upright state;

[0005] Two feeding conveyor belts are used to transport the battery cells from the upstream equipment to the loading position of the four-axis loading robot. The two feeding conveyor belts are equipped with automatic identification sensors. When a battery cell is detected on the conveyor belt, it is automatically transported to the edge gripping position of the battery cell CCD camera for positioning. After positioning, the four-axis robot picks up two battery cells at a time according to the position provided by the PLC. After picking up the battery cells, the four-axis loading robot sequentially transports the battery cells to the front barcode scanning platform and the front flipping station, scans the barcode of the battery cells, flips the air bag, and uploads the battery cell information to the MES system.

[0006] The loading gantry robot is used to transport battery cells from the front flipping platform to the front scanning platform, the front weighing station, the front NG sorting platform, the front buffer platform, and the fixture platform. The loading gantry robot includes a first loading gantry robot, a second loading gantry robot, and a third loading gantry robot. After the air bags are uprighted at the front flipping station, the first loading gantry robot transports the battery cells to the front weighing station for weighing before electrolyte injection and uploads the weight information to the MES system. The second loading gantry robot transports the battery cells that fail scanning and weighing to the NG sorting station for classification and storage, while the good ones are sorted and stored separately. The battery cells are transported to the front buffer platform for pairing. When the number of battery cells stored on the front buffer platform is greater than or equal to 4, the third loading gantry robot transports the battery cells from the front buffer platform in groups of 4 to the battery cell fixture. The battery cell fixture holds and fixes 8 battery cells. The battery cell fixture is equipped with a fixture conveyor line and a fixture return line. The flaring mechanism flares the battery cell air bag to prepare for electrolyte injection. The electrolyte injection mechanism is responsible for injecting a set weight of electrolyte into the battery cell. The settling mechanism allows the electrolyte to fully impregnate the inside of the battery cell. The sealing mechanism is responsible for sealing the battery cell air bag once to prepare for formation.

[0007] The front and rear scanning platforms are used to upload cell code information to the MES system;

[0008] The front weighing station is used to weigh the battery cells and upload the weight data to the MES system;

[0009] The front NG sorting platform is used to buffer battery cells that have scanning errors or are not up to weight standards, and they are manually removed when the storage is full.

[0010] The pre-caching platform is used for cell cache pairing;

[0011] The battery cell clamp is used to hold the battery cell in a fixed position; the battery cell clamp is set on the clamping platform;

[0012] The fixture conveyor line is used to transport fixtures to fixed workstations for bag opening, liquid injection, settling, and heat sealing.

[0013] The fixture return line is located below the fixture conveyor line. The fixture return line is used to return empty fixtures to the loading position, waiting for the loading gantry robot to transport the battery cells onto the fixtures; the fixture return line is responsible for returning empty battery cell fixtures to the battery cell loading position, realizing automatic cyclic loading and unloading.

[0014] The unloading gantry robot is used to transport battery cells from the fixture to the rear buffer platform, rear barcode scanning platform, rear weighing platform, rear NG sorting platform, and rear flipping platform. The unloading gantry robot includes a first unloading gantry robot, a second unloading gantry robot, and a third unloading gantry robot. The first unloading gantry robot is responsible for transporting the battery cells in groups of four from the battery cell fixture to the rear buffer platform. The second unloading gantry robot transports the battery cells in groups of three from the buffer platform to the rear barcode scanning and weighing platform for barcode scanning and weighing, and uploads the information to the MES system. The third unloading gantry robot transports the defective battery cells to the rear NG sorting platform for classified storage, and transports the good battery cells to the rear flipping platform to flip the battery cell angle.

[0015] The post-caching platform is used to cache the battery cells coming off the fixture;

[0016] The post-scanning platform is used to scan the codes on the battery cells and upload the data to the MES system;

[0017] The post-weighing platform is used to weigh the battery cells and upload the weight to the MES system;

[0018] The post-NG sorting platform is used to classify and buffer defective battery cells based on their flaring, barcode scanning, and weighing.

[0019] The rear tilting platform is used to tilt the battery cells from vertical to inclined positions, so that the unloading gantry robot can pick them up; the unloading gantry robot is used to move the battery cells from the rear tilting platform to the material tray for stacking.

[0020] The material tray handling robot is used to move empty material trays to the battery cell unloading position;

[0021] Empty disc feeder lines are used to transport empty discs into the equipment.

[0022] The full-pan discharge conveyor is used to transport full pans to the outside of the equipment; both the empty pan feeding conveyor and the full-pan discharge conveyor are equipped with a pallet lifting mechanism at one end; the material handling robot is responsible for transporting the empty cell pallets to the cell discharge station to realize automatic unloading cycle; in addition, an AVG that automatically docks with the empty pallet feeding conveyor and the full-pan discharge conveyor is set up to realize automatic unloading of the equipment without human intervention.

[0023] The unloading gantry robot takes five battery cells at a time from the rear tilting platform and places them on the battery cell tray. Each battery cell tray has five rows and ten columns, and one tray can store 50 battery cells. The battery cell trays can be stacked up to fifteen trays.

[0024] As an improvement of the soft-pack lithium battery cell liquid injection packaging equipment of the present invention, the flaring mechanism includes an upper bag-opening mounting plate and a lower bag-opening mounting plate. The upper bag-opening mounting plate is provided with guide sleeves at all four corners, and the lower bag-opening mounting plate is provided with guide rods at all four corners. The guide rods pass through the guide sleeves. The upper bag-opening mounting plate is provided with a bag-opening lifting cylinder and multiple clearance positions. The lower bag-opening mounting plate is provided with multiple bag-suction mechanisms at intervals.

[0025] The flaring mechanism also includes an intermediate lifting plate, on which multiple bag-opening scraper mechanisms are spaced apart.

[0026] As an improvement to the liquid injection packaging equipment for soft-pack lithium battery cells of the present invention, the bag suction mechanism includes a bag suction control cylinder, which controls the movement of a bag suction lifting bracket. The bag suction lifting bracket is provided with four sets of bag opening lifting guide rods at intervals. Each set of bag opening lifting guide rods has two bag opening guide rods. The bottom of each set of bag opening lifting guide rods is connected to a bag suction plate. The bag suction plate is provided with two inclined bag suction guide holes mirrored on it. Each bag suction guide hole is provided with a bag suction guide wheel. The bag suction guide wheel is connected to a suction cup mounting rod. The bottom of the suction cup mounting rod is provided with a suction cup mounting plate. Multiple suction cups are provided at intervals on the suction cup mounting plate. One side of the suction cup mounting rod is connected to a linear slide rail through a slider. Every two corresponding suction cup mounting rods open the bag opening of one battery cell.

[0027] As an improvement to the liquid injection packaging equipment for soft-pack lithium battery cells of the present invention, the bag-opening scraper mechanism includes a scraper lifting control motor mounted on an intermediate lifting plate and a lower bracket connected to the bag-opening mounting plate via guide rods. The scraper lifting control motor controls the lifting of a scraper bracket. The scraper bracket has four connecting rods, which pass through the lower bracket. The lower ends of every two connecting rods are connected to a scraper guide plate. The scraper guide plate has two inclined scraper guide holes mirrored on it. The lower bracket is provided with a slide rail mounting plate. The slide rail mounting plate is provided with a slide rail, which is slidably connected to a scraper mounting plate via a slider. A scraper is provided at the bottom of the scraper mounting plate, and a scraper guide wheel is provided in the middle of the scraper mounting plate. The scraper guide wheel extends into the scraper guide hole. A lead screw nut is provided in the middle of the scraper bracket. A lifting transmission lead screw is provided on the output shaft of the scraper lifting control motor. The lifting transmission lead screw is screwed to the lead screw nut. The scraper extends out from the lower mounting plate of the bag opening, and the upper end of the scraper lifting control motor extends out from the clearance position.

[0028] As an improvement to the soft-pack lithium battery cell liquid injection packaging equipment of the present invention, the bag suction mechanism opens the bag in a horizontal direction, the bag opening scraper mechanism opens the bag in a vertical direction, and the scraper extends between the two suction cup mounting plates.

[0029] After the suction bag control cylinder controls the two suction cup mounting plates to open, the bag opening lifting cylinder controls the multiple bag opening scraper mechanisms to descend, so that the scraper extends into the opening of the battery cell bag. During the process of the scraper lifting control motor controlling the scraper bracket to descend, the scraper guide wheel slides along the inclined scraper guide hole, so that the two scrapers are guided to open along the two mirror-shaped scraper guide holes, scraping open the bag opening to achieve secondary bag opening.

[0030] As an improvement to the soft-pack lithium battery cell liquid injection packaging equipment of the present invention, after the battery cell on the cell clamp is opened, it is transported by the fixture conveyor line to the area directly below the liquid injection mechanism;

[0031] The injection mechanism includes an injection cylinder mounting plate and an injection chamber. An injection cylinder is located in the middle of the injection cylinder mounting plate. A lower injection mounting plate is located at the upper end of the injection chamber. Injection guide rods are located at the four corners of the lower injection mounting plate. Four injection guide sleeves are spaced apart on the injection cylinder mounting plate. The injection guide rods pass through the injection guide sleeves. The upper ends of the injection guide rods are connected by a connecting frame. The piston rod end of the injection cylinder is connected to the connecting frame. Multiple injection needle control mechanisms are spaced apart on the lower injection mounting plate.

[0032] As an improvement of the liquid injection packaging equipment for soft-pack lithium battery cells of the present invention, the liquid injection needle control mechanism includes a cylinder mounting plate, a liquid injection needle control cylinder is provided on one side of the cylinder mounting plate, a connecting plate is provided at the piston rod end of the liquid injection needle control cylinder, a liquid injection needle mounting plate is provided on the connecting plate, a liquid injection needle is provided on the liquid injection needle mounting plate, and the liquid injection needle extends into the liquid injection cavity.

[0033] When the liquid injection mechanism injects liquid, the liquid injection cylinder controls the liquid injection chamber to descend and cover the clamp, and the liquid injection needle control cylinder controls the liquid injection needle to descend, so that the liquid injection needle is inserted into the bag opening of the battery cell.

[0034] As an improvement of the liquid injection packaging equipment for soft-pack lithium battery cells of the present invention, the heat sealing mechanism includes a heat sealing cavity, an intermediate connecting plate and an upper connecting plate. Side plates are respectively provided on both sides of the upper connecting plate, and slots are provided on both side plates. Four heat sealing lifting guide rods are spaced apart on the heat sealing cavity. Four heat sealing guide sleeves are spaced apart on the intermediate connecting plate. The heat sealing lifting guide rods pass through the heat sealing guide sleeves. A heat sealing lifting control cylinder is provided in the middle of the intermediate connecting plate, and the piston rod of the heat sealing lifting control cylinder is connected to the heat sealing cavity.

[0035] The upper front side of the intermediate connecting plate is provided with a front guide rod and the rear side is provided with a rear guide rod. The two ends of the front guide rod are respectively provided with cams, which extend into the slot. The two ends of the rear guide rod are respectively fixed to the side plate. One side of the upper connecting plate is provided with a tilting cylinder mounting plate. The tilting cylinder mounting plate is provided with a tilting control cylinder. The piston rod end of the tilting control cylinder is provided with a U-shaped connector. The U-shaped connector is rotatably connected to the mounting base through a shaft. The mounting base is mounted on the intermediate connecting plate. The end of the tilting control cylinder is provided with a connecting seat. The connecting seat is rotatably connected to the tilting cylinder mounting plate through a pin.

[0036] As an improvement of the liquid injection packaging equipment for soft-pack lithium battery cells of the present invention, an upper limit cylinder and a lower limit cylinder are provided at intervals on the two side plates. When the flip control cylinder controls the heat sealing cavity to flip to the side upright state, the upper limit cylinder controls the piston rod to extend and abut against the bottom surface of the intermediate connecting plate. When the flip control cylinder controls the heat sealing cavity to flip to the horizontal state, the lower limit cylinder controls the piston rod to extend and abut against the upper end surface of the intermediate connecting plate.

[0037] The heat-sealing cavity is provided with multiple heat-sealing gripper cylinders at intervals. Each heat-sealing gripper cylinder controls the movement of two gripping arms. Each gripping arm is provided with a heat-sealing plate, and the gripping surface of the heat-sealing plate is serrated.

[0038] As an improvement of the liquid injection packaging equipment for soft-pack lithium battery cells of the present invention, the settling mechanism includes a settling cavity and a settling control cylinder mounting plate. The settling cavity is movably connected to the settling control cylinder mounting plate through multiple settling lifting guide rods and guide sleeves. A settling lifting control cylinder is provided in the middle of the settling control cylinder mounting plate. The piston rod of the settling lifting control cylinder is connected to the guide rod connecting frame. The guide rod connecting frame is connected to the settling lifting guide rod.

[0039] The static chamber is equipped with a axial vacuum pipe and a drying gas pipe. During static operation, the static lifting control cylinder controls the static chamber to descend and cover the battery cell clamp. The axial vacuum pipe and the drying gas pipe alternately evacuate and break the vacuum in the static chamber.

[0040] The beneficial effects of this invention are as follows: The soft-pack lithium battery cell liquid injection packaging equipment of this invention horizontally transports the battery cells to the loading position through two feeding conveyor lines. A four-axis loading robot picks up two battery cells at a time from the two feeding conveyor belts and places the battery cells on the front flipping platform. The air bag of the battery cell is flipped from horizontal to vertical. After the air bag of the battery cell is upright at the front flipping station, the first loading gantry robot moves the battery cell to the front weighing station for pre-liquid injection weighing and uploads the weight information to the MES system. The second loading gantry robot moves the battery cells that fail the barcode scanning and weighing to the NG sorting station for classification and storage, and moves the good battery cells to the front buffer platform for pairing. When the number of battery cells stored on the front buffer platform is greater than or equal to 4, the third loading gantry robot moves the battery cells from the front buffer platform to the battery cell fixture in groups of 4. The battery cell fixture buffers and fixes 8 battery cells, and a clamp is provided under the battery cell fixture. The invention comprises a conveyor line and a fixture return line; a flaring mechanism flares the cell air bag to prepare for electrolyte injection; an injection mechanism injects a set weight of electrolyte into the cell; a settling mechanism allows the electrolyte to fully impregnate the cell; a sealing mechanism seals the cell air bag to prepare for formation; after heat sealing, the cell is conveyed to the unloading position by the fixture conveyor line; the first unloading gantry robot moves four cells at a time from the cell fixture to the rear buffer platform; the second unloading gantry robot moves three cells at a time from the buffer platform to the rear barcode and weighing platform for barcode scanning, weighing, and uploading information to the MES system; the third unloading gantry robot moves defective cells to the rear NG sorting platform for classification and storage, and good cells to the rear flipping platform for tilting; this invention achieves automated continuous processing of soft-pack battery cell electrolyte injection, with fully automated production from loading to unloading. The present invention also includes a secondary flaring mechanism before liquid injection, which can open the liquid injection port of the soft-pack battery cell first, separating liquid injection from bag opening. It eliminates the need to separate the air bag flaring of each battery cell individually during liquid injection. By opening bags in batches and then injecting liquid in batches, the equipment has higher production efficiency. Attached Figure Description

[0041] Figure 1 This is a perspective view of the present invention;

[0042] Figure 2 This is a perspective view of the present invention from another direction;

[0043] Figure 3 This is a perspective view of the flaring mechanism of the present invention;

[0044] Figure 4 This is a front view of the flaring mechanism of the present invention;

[0045] Figure 5 This is a perspective view of the liquid injection mechanism of the present invention;

[0046] Figure 6 This is a front view of the injection mechanism of the present invention;

[0047] Figure 7 This is a perspective view of the heat sealing mechanism of the present invention;

[0048] Figure 8 This is a front view of the heat sealing mechanism of the present invention;

[0049] Figure 9 This is a top view of the heat sealing mechanism of the present invention;

[0050] Figure 10 This is a top view of the present invention;

[0051] Figure 11 yes Figure 2 Enlarged view of point A in the image; Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0054] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0055] like Figures 1-6As shown, a soft-pack lithium battery cell liquid injection packaging equipment includes: two parallel feeding conveyors 2; a four-axis feeding robot 26; a feeding gantry robot 28; a front flipping platform 27; a front barcode weighing platform 8; a front NG sorting platform; a front buffer platform 9; a clamping platform; a clamping conveyor line 13; a clamping return line 14; a flaring mechanism 3; a liquid injection mechanism 4; a settling mechanism 5; a heat sealing mechanism 6; a unloading gantry robot 29; a rear buffer platform 16; a rear barcode weighing platform 18; a rear NG sorting platform; a rear flipping platform 20; a discharge gantry robot 25; a tray handling robot 24; an empty tray feeding conveyor line 22; a full tray feeding conveyor line 23; and a four-axis feeding robot 26 feeding from two... One feeding conveyor belt 2 picks up two battery cells at a time and places them on the front flipping platform 27, flipping the air bags of the battery cells from horizontal to vertical. Two feeding conveyor belts 2 are used to transport battery cells from upstream equipment to the loading position of the four-axis loading robot 26. The two feeding conveyor belts 2 are equipped with automatic identification sensors. When a battery cell is detected on the conveyor belt, it is automatically transported to the edge gripping position of the battery cell CCD camera for positioning. After positioning, the four-axis loading robot 26 picks up two battery cells at a time according to the position provided by the PLC. After picking up the battery cells, the robot sequentially transports the battery cells to the front barcode scanning platform and the front flipping station, scans the battery cell barcode, flips the air bags, and uploads the battery cell information to the MES system.

[0056] The loading gantry robot 28 is used to transport battery cells from the front tilting platform to the front barcode and weighing station 8, the front NG sorting platform, the front buffer platform 9, and seven clamping platforms. The loading gantry robot 28 includes a first loading gantry robot 7, a second loading gantry robot 10, and a third loading gantry robot 12. After the air bag of the battery cell is uprighted on the front tilting platform 27, the first loading gantry robot 7 transports the battery cell to the front barcode and weighing station 8, weighs it before electrolyte injection, and uploads the weight information to the MES system. The second loading gantry robot 10 transports the battery cells that fail barcode scanning and weighing to the NG sorting station for classification and storage, and transports the good battery cells to the front buffer platform. On platform 9, battery cells are paired. When the number of battery cells stored on the current buffer platform 9 is greater than or equal to 4, the third loading gantry robot 12 transports the battery cells from the front buffer platform in groups of 4 to the battery cell fixture 11. The battery cell fixture 11 buffers and fixes 8 battery cells. The battery cell fixture 11 is equipped with a fixture conveyor line and a fixture return line. The flaring mechanism 3 flares the battery cell air bag to prepare for electrolyte injection. The electrolyte injection mechanism 4 is responsible for injecting a set weight of electrolyte into the battery cell. The settling mechanism 5 allows the electrolyte to fully wet the inside of the battery cell. The sealing mechanism 6 is responsible for sealing the battery cell air bag once to prepare for formation. The front and rear barcode scanning platforms are used to upload the battery cell code information to the MES system.

[0057] The front scanning and weighing station 8 is used to weigh the battery cells and upload the weight data to the MES system;

[0058] The front NG sorting platform is used to buffer battery cells that have scanning errors or are not up to weight standards, and they are manually removed when the storage is full.

[0059] The front cache platform 9 is used for cell cache pairing;

[0060] The battery cell clamp 11 is used to wrap the battery cell in a fixed position; the battery cell clamp 11 is set on the clamp platform; the clamp conveyor line 13 is used to transport the battery cell clamp 11 to a fixed station for opening, liquid injection, settling and heat sealing; the clamp return line 14 is located below the clamp conveyor line, and the clamp return line 14 is used to return the empty battery cell clamp 11 to the loading position, waiting for the loading gantry robot 28 to transport the battery cell onto the battery cell clamp 11; the clamp return line 14 is responsible for returning the empty battery cell clamp to the battery cell loading position to realize automatic cyclic loading and unloading; both ends of the clamp return line 14 are equipped with a fixture lifting mechanism 15; the fixture lifting mechanism 15 includes a fixture lifting control cylinder, which controls the lifting of a lifting plate.

[0061] The unloading gantry robot 29 is used to transport battery cells from the fixture to the rear buffer platform 16, the rear barcode weighing platform 18, the rear NG sorting platform, and the rear flipping platform 20. The unloading gantry robot 29 includes a first unloading gantry robot 17, a second unloading gantry robot 19, and a third unloading gantry robot 21. The first unloading gantry robot 17 is responsible for transporting the battery cells in groups of four from the battery cell fixture 11 to the rear buffer platform 16. The second unloading gantry robot 19 transports the battery cells in groups of three from the buffer platform to the rear barcode and weighing platform 18 for barcode scanning and weighing, and uploads the information to the MES system. The third unloading gantry robot 21 transports the defective battery cells to the rear NG sorting platform for classification and storage, and transports the good battery cells to the rear flipping platform to flip the battery cell angle.

[0062] The post-cache platform 16 is used to cache the battery cells coming off the fixture;

[0063] The post-scanning platform is used to scan the codes on the battery cells and upload the data to the MES system;

[0064] The subsequent barcode scanning and weighing platform 18 is used to weigh the battery cells and upload the weight to the MES system;

[0065] The post-NG sorting platform is used to classify and buffer defective battery cells based on their flaring, barcode scanning, and weighing.

[0066] The rear flipping platform 20 is used to flip the battery cell from vertical to tilted position, so that the unloading gantry robot 25 can pick up the material.

[0067] The unloading gantry robot 25 is used to transport the battery cells from the rear tilting platform 20 to the material tray for stacking.

[0068] The material tray handling robot 24 is used to transport empty material trays to the battery cell unloading position;

[0069] The empty tray feeding conveyor line 22 is used to convey empty trays into the equipment;

[0070] The full-pan discharge conveyor 23 is used to transport full-pan materials to the outside of the equipment; both the empty-pan feeding conveyor 22 and the full-pan discharge conveyor 23 are equipped with a pallet lifting mechanism at one end; the pallet handling robot 24 is responsible for transporting the empty cell pallet to the cell discharge station to realize automatic unloading cycle; in addition, an AVG that automatically docks with the empty pallet feeding conveyor 22 and the full-pan discharge conveyor 23 is set up to realize automatic unloading of the equipment without human intervention.

[0071] The unloading gantry robot 25 picks up five battery cells at a time from the rear tilting platform and places them on the battery cell tray. Each battery cell tray has five rows and ten columns, and one tray can store 50 battery cells. The battery cell trays can be stacked up to fifteen trays.

[0072] Preferably, the flaring mechanism 3 includes an upper bag-opening mounting plate 31 and a lower bag-opening mounting plate 32. The upper bag-opening mounting plate 31 is provided with guide sleeves at each of its four corners, and the lower bag-opening mounting plate 32 is provided with guide rods at each of its four corners. The guide rods pass through the guide sleeves. The upper bag-opening mounting plate 31 is provided with a bag-opening lifting cylinder 33 and multiple clearance positions 34. The lower bag-opening mounting plate 32 is provided with multiple bag-suction mechanisms 35 at intervals.

[0073] The flaring mechanism 3 also includes an intermediate lifting plate 36, on which multiple bag-opening scraper mechanisms 37 are spaced apart.

[0074] Preferably, the suction bag mechanism 35 includes a suction bag control cylinder 351, which controls the movement of a suction bag lifting bracket 352. The suction bag lifting bracket 352 is provided with four sets of opening lifting guide rods 353 at intervals. Each set of opening lifting guide rods 353 has two opening guide rods. The bottom of each set of opening lifting guide rods 353 is connected to a suction bag plate 354. The suction bag plate 354 is provided with two inclined suction bag guide holes 355 mirrored on it. Each suction bag guide hole 355 is provided with a suction bag guide wheel 356. The suction bag guide wheel 356 is connected to a suction cup mounting rod 357. The bottom of the suction cup mounting rod 357 is provided with a suction cup mounting plate 358. Multiple suction cups 359 are provided at intervals on the suction cup mounting plate 358. One side of the suction cup mounting rod 357 is connected to a linear slide rail through a slider. Every two corresponding suction cup mounting rods 357 open the bag opening of one battery cell.

[0075] Preferably, the bag-opening scraper mechanism 37 includes a scraper lifting control motor 371 mounted on the intermediate lifting plate 36 and a lower bracket 372 connected to the bag-opening mounting plate 31 via guide rods. The scraper lifting control motor 371 controls the lifting of a scraper bracket 373. The scraper bracket 373 has four connecting rods 374, which pass through the lower bracket 372. The lower ends of every two connecting rods 374 are connected to a scraper guide plate 375. The scraper guide plate 375 has two inclined scraper guide holes 376 mirrored on it. The lower bracket 372 is provided with a slide rail mounting plate 377. The mounting plate 377 is equipped with a slide rail, which is slidably connected to the scraper mounting plate 378 via a slider. The scraper 379 is located at the bottom of the scraper mounting plate 378, and the scraper guide wheel 370 is located in the middle of the scraper mounting plate 378. The scraper guide wheel 370 extends into the scraper guide hole 376. The middle of the scraper bracket 373 is equipped with a lead screw nut. The output shaft of the scraper lifting control motor 371 is equipped with a lifting transmission lead screw 3710, which is screwed to the lead screw nut. The scraper 379 extends out from the lower mounting plate 32 of the bag opening, and the upper end of the scraper lifting control motor 371 extends out from the clearance position 34.

[0076] Preferably, the bag-opening direction of the suction bag mechanism 35 is horizontal, and the bag-opening scraper mechanism 37 is vertical, with the scraper extending between the two suction cup mounting plates;

[0077] After the suction bag control cylinder 351 controls the two suction cup mounting plates 358 to open, the bag opening lifting cylinder 33 controls the multiple bag opening scraper mechanisms 37 to descend, so that the scraper 379 extends into the opening of the battery cell bag. During the process of the scraper lifting control motor 371 controlling the scraper bracket 373 to descend, the scraper guide wheel 370 slides along the inclined scraper guide hole 376, so that the two scrapers 379 are guided to open along the two mirror-set scraper guide holes 376, scraping open the bag opening and realizing secondary bag opening.

[0078] Preferably, after the battery cells on the battery cell clamp 11 are unpacked, they are transported by the fixture conveyor line 13 to the area directly below the liquid injection mechanism 4;

[0079] The injection mechanism 4 includes an injection cylinder mounting plate 41 and an injection chamber 42. An injection cylinder 43 is provided in the middle of the injection cylinder mounting plate 41. An injection lower mounting plate 44 is provided at the upper end of the injection chamber 42. An injection guide rod is provided at each of the four corners of the injection lower mounting plate 44. Four injection guide sleeves are provided at intervals on the injection cylinder mounting plate 41. The injection guide rods pass through the injection guide sleeves. The upper ends of the injection guide rods are connected by a connecting frame 45. The piston rod end of the injection cylinder 43 is connected to the connecting frame 45. Multiple injection needle control mechanisms 46 are provided at intervals on the injection lower mounting plate 44.

[0080] Preferably, the injection needle control mechanism 46 includes a cylinder mounting plate 461, an injection needle control cylinder 462 is provided on one side of the cylinder mounting plate 461, a connecting plate 463 is provided at the piston rod end of the injection needle control cylinder 462, an injection needle mounting plate 464 is provided on the connecting plate 463, and an injection needle 465 is provided on the injection needle mounting plate 464, with the injection needle 465 extending into the injection cavity 42;

[0081] When the liquid injection mechanism 4 injects liquid, the liquid injection cylinder 43 controls the liquid injection chamber 42 to descend and cover the battery cell clamp 11, and the liquid injection needle control cylinder 462 controls the liquid injection needle 465 to descend, so that the liquid injection needle is inserted into the bag opening of the battery cell.

[0082] Preferably, the heat sealing mechanism 6 includes a heat sealing cavity 61, an intermediate connecting plate 62 and an upper connecting plate 63. Side plates 64 are provided on both sides of the upper connecting plate 63, and slots 65 are provided on both side plates 64. Four heat sealing lifting guide rods are provided at intervals on the heat sealing cavity 61. Four heat sealing guide sleeves are provided at intervals on the intermediate connecting plate 62. The heat sealing lifting guide rods pass through the heat sealing guide sleeves. A heat sealing lifting control cylinder 66 is provided in the middle of the intermediate connecting plate 62. The piston rod of the heat sealing lifting control cylinder 66 is connected to the heat sealing cavity 61.

[0083] The upper front side of the intermediate connecting plate 62 is provided with a front guide rod 67 and the rear side is provided with a rear guide rod 68. The two ends of the front guide rod 67 are respectively provided with cams 69, which extend into the slot 65. The two ends of the rear guide rod 68 are respectively fixed on the side plate 64. The side of the upper connecting plate 63 is provided with a tilting cylinder mounting plate 60. The tilting cylinder mounting plate 60 is provided with a tilting control cylinder 601. The piston rod end of the tilting control cylinder 601 is provided with a U-shaped connector 602. The U-shaped connector 602 is rotatably connected to the mounting seat 603 through a shaft. The mounting seat 603 is mounted on the intermediate connecting plate 62. The end of the tilting control cylinder 601 is provided with a connecting seat. The connecting seat is rotatably connected to the tilting cylinder mounting plate 60 through a pin.

[0084] Preferably, an upper limit cylinder 604 and a lower limit cylinder 605 are provided on the two side plates 64 at intervals. When the flip control cylinder 601 controls the heat sealing cavity 61 to flip to the side upright state, the upper limit cylinder 604 controls the piston rod to extend and abut against the bottom surface of the middle connecting plate 62. When the flip control cylinder 601 controls the heat sealing cavity 61 to flip to the horizontal state, the lower limit cylinder 605 controls the piston rod to extend and abut against the upper end surface of the middle connecting plate 62.

[0085] Multiple heat-sealing gripper cylinders 606 are spaced apart on the heat-sealing cavity 61. Each heat-sealing gripper cylinder controls the movement of two gripping arms. Each gripping arm is equipped with a heat-sealing plate, and the gripping surface of the heat-sealing plate is serrated.

[0086] Preferably, the stationary mechanism 5 includes a stationary cavity 51 and a stationary control cylinder mounting plate 52. The stationary cavity 51 is movably connected to the stationary control cylinder mounting plate 52 via multiple stationary lifting guide rods 55 and guide sleeves. A stationary lifting control cylinder 53 is provided in the middle of the stationary control cylinder mounting plate 52. The piston rod of the stationary lifting control cylinder 53 is connected to the guide rod connecting frame 54, and the guide rod connecting frame 54 is connected to the stationary lifting guide rod 55.

[0087] The settling chamber 51 is equipped with a shaft vacuum pipe 56 and a drying gas pipe 57. During the settling operation, the settling lifting control cylinder 53 controls the settling chamber 51 to descend and cover the clamp 13. The shaft vacuum pipe 56 and the drying gas pipe 57 alternately evacuate and break the vacuum in the settling chamber 51 to accelerate the settling of the electrolyte.

[0088] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and structure of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid injection packaging device for soft-pack lithium battery cells, characterized in that, The equipment is equipped with two parallel feeding conveyors, a four-axis loading robot, a loading gantry robot, a front tilting platform, a front scanning platform, a front weighing platform, a front NG sorting platform, a front buffer platform, a clamping platform, a clamping conveyor line, a clamping return line, a flaring mechanism, a liquid injection mechanism, a settling mechanism, a heat sealing mechanism, a unloading gantry robot, a rear buffer platform, a rear scanning platform, a rear weighing platform, a rear NG sorting platform, a rear tilting platform, a discharge gantry robot, a tray handling robot, an empty tray feeding conveyor line, and a full tray feeding conveyor line. The four-axis loading robot picks up two battery cells at a time from the two feeding conveyors and places them on the front tilting platform, tilting the air bags of the battery cells from horizontal to vertical. Two feed belts are used to transport the battery cells from the upstream equipment to the loading position of the four-axis loading robot. The loading gantry robot is used to transport battery cells from the front flipping platform to the front scanning platform, the front weighing station, the front NG sorting platform, the front buffer platform, and the seven clamping platforms. Front and rear scanning platforms: Upload cell code information to the MES system; The front weighing station is used to weigh the battery cells and upload the weight data to the MES system; The front NG sorting platform is used to buffer battery cells that have scanning errors or are not up to weight standards, and they are manually removed when the storage is full. The pre-caching platform is used for cell cache pairing; Battery cell clamps are used to hold battery cells in a fixed position; The fixture conveyor line is used to transport fixtures to fixed workstations for bag opening, liquid injection, settling and heat sealing; The fixture return line is located below the fixture conveyor line. The fixture return line is used to return empty fixtures to the loading position, waiting for the loading gantry robot to transport the battery cells onto the fixture. The unloading gantry robot is used to move battery cells from the fixture to the rear buffer platform, rear barcode scanning platform, rear weighing platform, rear NG sorting platform and rear flipping platform; The post-caching platform is used to cache the battery cells coming off the fixture; The post-scanning platform is used to scan the codes on the battery cells and upload the data to the MES system; The post-weighing platform is used to weigh the battery cells and upload the weight to the MES system; The post-NG sorting platform is used to classify and buffer defective battery cells based on their flaring, barcode scanning, and weighing. The rear tilting platform is used to tilt the battery cells from vertical to inclined positions, so that the unloading gantry robot can pick them up; the unloading gantry robot is used to move the battery cells from the rear tilting platform to the material tray for stacking. The material tray handling robot is used to move empty material trays to the battery cell unloading position; Empty disc feeder lines are used to transport empty discs into the equipment. The full-pan discharge conveyor is used to transport full pans to the outside of the equipment; both the empty-pan infeed conveyor and the full-pan discharge conveyor are equipped with a pallet lifting mechanism at one end. The unloading gantry robot takes five battery cells at a time from the rear tilting platform and places them on the battery cell tray. Each battery cell tray has five rows and ten columns, and each battery cell tray can store 50 battery cells. The battery cell trays can be stacked up to fifteen trays.

2. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 1, characterized in that, The flaring mechanism includes an upper bag-opening mounting plate and a lower bag-opening mounting plate. The upper bag-opening mounting plate is provided with guide sleeves at its four corners, and the lower bag-opening mounting plate is provided with guide rods at its four corners. The guide rods pass through the guide sleeves. The upper bag-opening mounting plate is provided with a bag-opening lifting cylinder and multiple clearance positions. The lower bag-opening mounting plate is provided with multiple bag-suction mechanisms at intervals. The flaring mechanism also includes an intermediate lifting plate, on which multiple bag-opening scraper mechanisms are spaced apart.

3. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 2, characterized in that, The suction bag mechanism includes a suction bag control cylinder that controls the movement of a suction bag lifting bracket. The suction bag lifting bracket has four sets of opening lifting guide rods spaced apart. Each set of opening lifting guide rods has two opening guide rods, and the bottom of each set is connected to a suction bag plate. The suction bag plate has two inclined suction bag guide holes mirrored on it. Each suction bag guide hole contains a suction bag guide wheel, which is connected to a suction cup mounting rod. The bottom of the suction cup mounting rod has a suction cup mounting plate, and multiple suction cups are spaced apart on the suction cup mounting plate. One side of the suction cup mounting rod is connected to a linear slide rail via a slider. Every two corresponding suction cup mounting rods together open the bag opening of one battery cell.

4. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 1, characterized in that, The bag-opening scraper mechanism includes a scraper lifting control motor mounted on a middle lifting plate and a lower bracket connected to the bag-opening mounting plate via guide rods. The scraper lifting control motor controls the lifting of a scraper bracket. The scraper bracket has four connecting rods, which pass through the lower bracket. The lower ends of every two connecting rods are connected to a scraper guide plate. The scraper guide plate has two inclined scraper guide holes mirrored on it. The lower bracket has a slide rail mounting plate with a slide rail. The slide rail is slidably connected to the scraper mounting plate via a slider. The scraper is located at the bottom of the scraper mounting plate, and a scraper guide wheel is located in the middle of the scraper mounting plate. The scraper guide wheel extends into the scraper guide hole. A lead screw nut is located in the middle of the scraper bracket. The output shaft of the scraper lifting control motor has a lifting transmission lead screw, which is screwed to the lead screw nut. The scraper extends from the bag-opening lower mounting plate, and the upper end of the scraper lifting control motor extends from the clearance position.

5. The soft-pack lithium battery cell liquid injection packaging equipment according to claim 4, characterized in that, The bag-opening mechanism opens the bag horizontally, the bag-opening scraper mechanism opens the bag vertically, and the scraper extends between the two suction cup mounting plates. After the suction bag control cylinder controls the two suction cup mounting plates to open, the bag opening lifting cylinder controls the multiple bag opening scraper mechanisms to descend, so that the scraper extends into the opening of the battery cell bag. During the process of the scraper lifting control motor controlling the scraper bracket to descend, the scraper guide wheel slides along the inclined scraper guide hole, so that the two scrapers are guided to open along the two mirror-shaped scraper guide holes, scraping open the bag opening to achieve secondary bag opening.

6. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 1, characterized in that, After the battery cells on the battery cell clamp are unpacked, they are transported by the fixture conveyor line to the area directly below the liquid injection mechanism; The injection mechanism includes an injection cylinder mounting plate and an injection chamber. An injection cylinder is located in the middle of the injection cylinder mounting plate. A lower injection mounting plate is located at the upper end of the injection chamber. Injection guide rods are located at the four corners of the lower injection mounting plate. Four injection guide sleeves are spaced apart on the injection cylinder mounting plate. The injection guide rods pass through the injection guide sleeves. The upper ends of the injection guide rods are connected by a connecting frame. The piston rod end of the injection cylinder is connected to the connecting frame. Multiple injection needle control mechanisms are spaced apart on the lower injection mounting plate.

7. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 1, characterized in that, The injection needle control mechanism includes a cylinder mounting plate, an injection needle control cylinder is provided on one side of the cylinder mounting plate, a connecting plate is provided at the piston rod end of the injection needle control cylinder, an injection needle mounting plate is provided on the connecting plate, an injection needle is provided on the injection needle mounting plate, and the injection needle extends into the injection cavity. When the liquid injection mechanism injects liquid, the liquid injection cylinder controls the liquid injection chamber to descend and cover the clamp, and the liquid injection needle control cylinder controls the liquid injection needle to descend, so that the liquid injection needle is inserted into the bag opening of the battery cell.

8. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 1, characterized in that, The heat sealing mechanism includes a heat sealing cavity, an intermediate connecting plate, and an upper connecting plate. Side plates are provided on both sides of the upper connecting plate, and slots are provided on both side plates. Four heat sealing lifting guide rods are spaced apart on the heat sealing cavity. Four heat sealing guide sleeves are spaced apart on the intermediate connecting plate. The heat sealing lifting guide rods pass through the heat sealing guide sleeves. A heat sealing lifting control cylinder is provided in the middle of the intermediate connecting plate, and the piston rod of the heat sealing lifting control cylinder is connected to the heat sealing cavity. The upper front side of the intermediate connecting plate is provided with a front guide rod and the rear side is provided with a rear guide rod. The two ends of the front guide rod are respectively provided with cams, which extend into the slot. The two ends of the rear guide rod are respectively fixed to the side plate. One side of the upper connecting plate is provided with a tilting cylinder mounting plate. The tilting cylinder mounting plate is provided with a tilting control cylinder. The piston rod end of the tilting control cylinder is provided with a U-shaped connector. The U-shaped connector is rotatably connected to the mounting base through a shaft. The mounting base is mounted on the intermediate connecting plate. The end of the tilting control cylinder is provided with a connecting seat. The connecting seat is rotatably connected to the tilting cylinder mounting plate through a pin.

9. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 8, characterized in that, An upper limit cylinder and a lower limit cylinder are provided at intervals on the two side plates. When the flip control cylinder controls the heat sealing cavity to flip to the side upright state, the upper limit cylinder controls the piston rod to extend and abut against the bottom surface of the intermediate connecting plate. When the flip control cylinder controls the heat sealing cavity to flip to the horizontal state, the lower limit cylinder controls the piston rod to extend and abut against the upper end surface of the intermediate connecting plate. The heat-sealing cavity is provided with multiple heat-sealing gripper cylinders at intervals. Each heat-sealing gripper cylinder controls the movement of two gripping arms. Each gripping arm is provided with a heat-sealing plate, and the gripping surface of the heat-sealing plate is serrated.

10. The liquid injection packaging equipment for soft-pack lithium battery cells according to claim 1, characterized in that, The stationary mechanism includes a stationary cavity and a stationary control cylinder mounting plate. The stationary cavity is movably connected to the stationary control cylinder mounting plate through multiple stationary lifting guide rods and guide sleeves. A stationary lifting control cylinder is provided in the middle of the stationary control cylinder mounting plate. The piston rod of the stationary lifting control cylinder is connected to the guide rod connecting frame, and the guide rod connecting frame is connected to the stationary lifting guide rod. The static chamber is equipped with a axial vacuum pipe and a drying gas pipe. During static operation, the static lifting control cylinder controls the static chamber to descend and cover the clamp. The axial vacuum pipe and the drying gas pipe alternately evacuate and break the vacuum in the static chamber.

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