CN204407433U - The plastic equipment of a kind of lithium battery - Google Patents

Abstract

The utility model discloses the plastic equipment of a kind of lithium battery, comprise base, described base is provided with: film supplying unit, has the rotating disk that two are placed volume films, and what each rotating disk was corresponding put film path is provided with successively regulating wheel and for the extruder member by flattened roll film pre-expansion; Film cutting machine structure, is arranged on and puts on film path, be provided with pull volume film membrane assembly and by the cutting knife of film segment; Coating workbench, described coating workbench is provided with the suction membrane module pulled open with volume film, and the promotion cylinder for being released by the lithium battery completing coating; Feeding machanism, has the feeder channel of single conveying lithium battery, and the end of feeder channel is provided with the cylinder being pushed by lithium battery and pull open in volume film; Discharging mechanism, has the tapping channel accepted and promote cylinder release lithium battery, and the both sides of described tapping channel are provided with the neat clamping plate of tune regulating lithium battery position in film, and the end of tapping channel is provided with the spring bearer plate acting on lithium battery.The utility model coating speed is fast, and quality is high.

Description

A lithium battery packaging equipment

technical field

The invention relates to the field of lithium battery production and manufacturing, in particular to a lithium battery plastic packaging equipment.

Background technique

Lithium batteries usually come in two shapes: cylindrical and square. The inside of the battery adopts a spiral wound structure, and a very fine and highly permeable polyethylene film separator material is used to space the positive and negative electrodes. The positive electrode includes a current collector composed of lithium cobalt oxide (or lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, etc.) and aluminum foil. The negative electrode consists of a current collector composed of graphitized carbon material and copper foil. The battery is filled with an organic electrolyte solution. In addition, a safety valve and a PTC element (partial cylindrical use) are installed to protect the battery from damage when the battery is in an abnormal state and the output is short-circuited.

In order to prevent the lithium battery from being damaged during transportation and use, causing battery performance degradation or even scrapping, the outer lithium battery is protected by a coating, and folded edges are formed at both ends of the battery cell to form a bag-shaped protective film . Some enterprises adopt the method of artificial coating, the consistency of the artificial coating is not good, the efficiency is not high, and the sweat stains, dust and powder on fingers and gloves will pollute the battery cells and affect the quality of the batteries.

In the prior art, the patent document with the authorized announcement number CN 202170022 U provides a battery coating device, and its coating mechanism includes: a coating table, a pressing knife device, a film pulling device, a film pressing device and a diaphragm cutting device The diaphragm cutting device is arranged on the discharge port side of the diaphragm unwinding mechanism; the film pulling device includes a film pulling clamp block and its drive unit, and the first working position of the film pulling clamp block is located at the discharge port of the diaphragm unwinding mechanism. The distance between the second working position and the first working position is greater than or equal to the length of the diaphragm required for a single cell coating; the film pressing device includes two film pressing rollers and their driving units in the direction of diaphragm unwinding. The rollers are located on both sides of the coating table, and any one of the laminating rollers includes the first working position where the upper surface of the laminating roller is lower than the surface of the coating table, and the lower surface of the laminating roller is pressed against the cell edge on the coating table. The second working position of the second working position, and the third working position where the pressing roller is pressed on the upper surface of the cell on the coating table; the cell coating equipment realizes the automatic production of the cell coating, avoiding the pollution of the artificial coating .

There are many problems in the use of the existing coating equipment, such as: the film unwinding speed of the diaphragm unwinding mechanism is slow; the film tape is flat after cutting, and it is difficult to push the battery into the film tape; The location of the battery is uneven, resulting in inconsistent lengths of the coating at both ends of the battery cell; the coated lithium battery is discharged from the discharge channel, and is next to the conveyor belt that rolls down to the drying tunnel, and the film shrinkage film is bonded together, causing the film shrinkage to fail. Affect the coating quality of lithium batteries.

Utility model content

In order to overcome the problems existing in the prior art, the utility model provides a lithium battery packaging equipment with simple structure and convenient operation. The packaging process of the lithium battery is completed automatically, and the coating speed is fast and the efficiency is high. The lithium battery is located in the In the middle of the film, the coating quality is good, and it is output to the drying tunnel at intervals to improve the shrinkage quality of the film.

A lithium battery plastic packaging equipment, including a base, the base is provided with:

The film supply mechanism has two turntables for placing the roll film, each turntable is provided with a tension wheel and an extrusion part for pre-expanding the flat roll film in turn on the film release path corresponding to the turntable;

The film cutting mechanism is arranged on the film release path, and is equipped with a film pulling component for pulling the roll film and a cutter for cutting the film into sections;

Coating workbench, the described coating workbench is provided with the suction membrane component that is pulled apart by rolling film, and is used for pushing out the lithium battery that completes coating;

The feeding mechanism has a single-row feeding channel for conveying lithium batteries, and the end of the feeding channel is provided with a cylinder that pushes the lithium batteries into the unrolled film;

The discharge mechanism has a discharge channel for pushing the cylinder to push out the lithium battery. The two sides of the discharge channel are provided with alignment splints to adjust the position of the lithium battery in the film. The end of the discharge channel is provided with a Elastic pressure plate.

As an improvement of the technical solution, the tension wheel is installed on the base at the lower part of the turntable through an elastic support rod.

As a further improvement of the technical solution, the extruding part includes two movable rotating rollers, and between the two rotating rollers is a film passing channel, and the width of the film passing channel is smaller than the diameter of the film.

As an improvement of the technical solution, the film pulling assembly includes a sliding seat that slides along the base, a film passage is provided in the sliding seat, a lifting clamp is arranged above the film passage, and a vertical clamp is fixed above the lifting clamp. The guide rod extending to the outside of the sliding seat is covered with a spring for keeping the lifting clamp block pressed down.

As an improvement of the technical solution, the film pulling assembly and the cutter are matched by a lever, one end of the lever is connected to the top of the cutter, and the other end is used to guide the lifting clamp to rise when the cutter is pressed down.

As an improvement of the technical solution, the film suction assembly includes a vacuum suction plate embedded on the coating workbench, the vacuum suction plate is distributed with film suction ports, and a movable lifting arm is installed above the coating workbench, so The lifting arm is equipped with a vacuum suction cup that cooperates with the vacuum suction plate.

As an improvement of the technical solution, the two ends of the feeding channel respectively have a feeding level at a high position and a discharging level at a low position;

One side of the discharge position is provided with a discharge port, and the other side is equipped with the push cylinder;

The sliding channel between the feeding level and the discharging level is provided with a pressing plate that limits the passage of lithium batteries in a single row, and a reclaiming cover that covers the sliding channel.

As an improvement of the technical solution, one side of the discharge port is provided with a film inlet nozzle, which has a pointed mouth for guiding the lithium battery into the film, and the pointed mouth is composed of a plurality of elastic pieces spell.

As an improvement of the technical solution, the two sides of the discharge channel are provided with adjustment clamping ports, and the two adjustment clamping ports are provided with synchronously moving aligning splints, and the aligning splints have a clamping force acting on the end of the lithium battery. raised.

As an improvement of the technical solution, the elastic pressing plate has a material blocking portion extending to the discharge opening of the discharge channel, and a counterweight is placed above the elastic pressing plate.

The utility model adopts full automation to complete the packaging process of the lithium battery. The coating speed is fast and the efficiency is high. The lithium battery is located in the middle of the film, and the quality of the coating is good, and it is output to the drying tunnel at intervals to improve the shrinkage quality of the film.

Description of drawings

Fig. 1 is the structural representation of film feeding mechanism;

Fig. 2 is the structural representation of film cutting mechanism;

Fig. 3 is the structural representation of coating workbench;

Fig. 4 is the structural representation of feeding mechanism;

Fig. 5 is a structural diagram of the alignment assembly of the discharging mechanism;

Fig. 6 is a structural diagram of the elastic pressure plate of the discharge mechanism.

Detailed ways

As shown in FIGS. 1 to 6 , a plastic-coating equipment for lithium batteries includes a base 1 on which a film feeding mechanism, a film cutting mechanism, a coating workbench, a feeding mechanism and a discharging mechanism are arranged.

As shown in FIG. 1 , the film feeding mechanism includes two turntables 2 for placing roll films, and each turntable 2 is provided with a tension wheel 4 and a pressing part for pre-expanding the flat roll film on the corresponding film release path. The roll film for plastic wrapping is placed on the turntable, and the film is released by rotating the turntable. The tension wheel is used to guide the walking path of the film release, and the extrusion part is used to pre-expand the flat roll film to avoid adhesion on the inner wall of the film, which is convenient for follow-up Push the cell into the membrane.

The motor that drives the turntable 2 is housed on the base 1 to drive the turntable through the motor, and keep the synchronization of the two turntables. The outer periphery of the turntable 2 is provided with an arc-shaped material stopper 9, which has a blocking effect on the film and prevents the film from expanding outside the turntable. The tension wheel 4 is installed on the base 1 through the elastic support rod 5. The tension wheel has elasticity, and its position can adapt to the traction force of the film, so as to reduce the resistance in the film feeding process and keep the film in a straightened state all the time.

The extruding part 7 has a feeding passage smaller than the diameter of the roll film, and a limit sleeve 6 is provided in the front. When the film passes through the feeding passage smaller than the diameter of the roll film, the strip-shaped roll film is pre-expanded through the extrusion of the material passage. The inner wall of the roll film is separated to avoid the adhesion of the inner wall and affect the subsequent insertion of lithium batteries.

The extruding part 7 includes two movable rotating rollers, and there is a feeding channel between the two rotating rollers. By arranging two rotating rollers, and forming a feeding channel at the two rotating rollers, when the film passes through the feeding channel, it drives the rotating roller Rotation reduces the resistance of the membrane to pass through and reduces the wear on the membrane. At the outlet of the film release path, there is a limit plate 8 on the base, the outlet is located under the limit plate 8, the film is sent out from the bottom of the limit plate, and the limit plate keeps the film in a strip shape, which is convenient for subsequent film cutting mechanism.

As shown in Figure 2, the film pulling assembly includes a sliding seat 17 that slides along the base 1. A film passing channel is provided in the sliding seat 17. A lifting clamp 12 is arranged above the film passing channel, and a lifting clamp 12 is fixed above the lifting clamp 12. Vertically extend to the guide rod 19 outside the sliding seat, the guide rod is sheathed with a spring that keeps the lifting clamp 12 pressed down. The film pulling assembly and the cutter 13 are matched by a lever 15. One end of the lever 15 is connected to the top of the cutter, and the other end is used to guide the lifting clamp 12 to rise when the cutter 13 is pressed down.

In this embodiment, the film pulling assembly and the cutting knife are matched by a lever. When feeding forward, the cutting knife is in the rising position, the other end of the lever is pressed down, and the lifting clamp is kept pressed down under the action of the spring, and the front of the sliding seat Moving and feeding; when the sliding seat swings back, the cutter is pressed down, and the other end of the lever is tilted up, driving the lifting clamp to rise until it returns to the initial position for the next feeding operation.

There are two lifting clamps 12, and the corresponding guide rod 19 tops of the two lifting clamps are connected by a support rod. The other end of lever 15 stretches into the bottom of support rod, and the guide wheel 10 that rolls along lever 15 is sleeved on the support rod. When the cutter presses down to cut the film, the other end of the lever tilts up. At this time, the sliding seat swings back, the guide wheel on the support rod rolls along the lever, and the lifting clamp overcomes the force of the spring to release the pressure on the film belt.

The base 1 is provided with a cylinder that drives the sliding seat 17 to reciprocate. The cutter is movably installed in the cutter seat 14 on the base. Avoid overlapping of two membrane strips in the membrane delivery channel.

The middle part of lever 15 is hinged on the cutter seat 14, and a lifting column for compressing the film band is installed in the cutter seat 14. When the cutting knife is pressed down, the lifting column descends and compresses the film tape 16 simultaneously to suppress the film tape from warping, which is beneficial to accurately control the cutting length of the film tape. The spring is installed in the mounting tube 18 , one end is against the lifting clamp 12 , and the other end is against the sliding seat 17 .

As shown in FIG. 3 , a vacuum suction plate 22 is provided on the coating workbench 21 , and film suction ports 23 are distributed on the vacuum suction plate 22 . A movable lifting arm 24 is installed above the coating workbench 21, and the lifting arm 24 is equipped with a vacuum suction cup 25 that cooperates with the vacuum suction plate 22. The cut film tape is placed on the vacuum suction plate 22 of the coating workbench, the lifting arm 24 drives the vacuum suction cup 25 to press down, and the vacuum is turned on, the vacuum suction plate and the vacuum suction cup firmly suck the two sides of the film tape at the same time, the lifting arm Rise and reset, the height of the lift is adapted to the diameter of the membrane belt, just to pull the membrane belt completely apart, so as to facilitate the insertion of lithium battery cells.

The side of coating workbench 21 is provided with guide rod 26, and one end of lifting arm 24 is movably sleeved on the guide rod, and the bottom of coating workbench is equipped with the cylinder that drives lifting arm. The coating workbench 21 has a hollow installation cavity, the vacuum suction plate covers the upper part of the installation cavity, and the vacuum suction plate is embedded in the installation cavity on the coating workbench, which is beneficial to the installation of the vacuum pipeline under the vacuum suction plate and also facilitates the vacuum Cleaning and replacement of the suction plate.

In order to make the film suction port have a strong enough suction, the size of the film suction port should be reduced as much as possible, and the opening position of the film suction port should correspond to the position of the film belt. The film suction port can be a small vacuum suction hole, or it can be a The strip-shaped holes arranged axially along the film strip are preferably used. The strip-shaped holes have a larger area and can provide greater suction.

The vacuum suction cup 2 is fitted on the bottom of the lifting arm through a threaded seal. The vacuum suction cup is hollow inside, and suction holes are distributed on the bottom surface of the vacuum suction cup.

As shown in Figure 4, there is a sliding passage 27 for conveying lithium batteries on the base, and the two ends of the sliding passage 27 respectively have a feeding position 28 at a high position and a discharging position 29 at a low position; one side of the discharging position 29 is provided with The discharge port is 35, and the other side is equipped with a cylinder for pushing out the lithium battery; the sliding channel between the feeding level and the discharging level is provided with a limit mechanism that limits the passage of lithium batteries in a single row, and a reclaimer covering the sliding channel. Cover plate 34.

In this embodiment, there is a high feeding level and a low discharging level on the sliding channel, and the lithium battery relies on gravity to roll in the sliding channel without an independent transmission mechanism and low energy consumption; the limit mechanism is used to use Lithium batteries are conveyed in a single row in the sliding channel and arranged neatly; and the lithium batteries in the sliding channel are adjusted by opening the reclaiming cover, or the lithium batteries in the sliding channel are taken out.

A heightened baffle plate 30 is provided on the wall of the sliding channel 27 corresponding to the charging position 28 to form a feeding bin for adding lithium batteries to the sliding channel. Lithium batteries can be stacked in the charging position to push the lithium batteries in the sliding channel down.

The limiting mechanism includes a first limiting mechanism and a second limiting mechanism arranged in sequence, the first limiting mechanism is located at the horizontal section of the sliding passage 27, and the second limiting mechanism is installed at the sliding section of the sliding passage. The first limit mechanism and the second limit mechanism are used to keep a single row of lithium batteries passing through the horizontal section and the downward section, so as to avoid mutual extrusion and cause dislocation of lithium batteries. The first limiting mechanism includes a mounting bracket 31 fixed on the top of the sliding passage, and the bottom of the mounting bracket 31 is equipped with a limiting plate 32 extending axially along the sliding passage; the second limiting mechanism is arranged on both sides of the sliding passage and along the The curved plate 33 of the sliding channel. The limiting plate and the curved plate have a limiting effect on the lithium batteries in the sliding channel, and keep the lithium batteries sliding down in a single row.

The material retrieving cover plate 34 is transferred above the sliding passage 27, which is convenient for opening of the material retrieving cover plate. Simultaneously, the end of discharge level is hinged with baffle plate 36, and this baffle plate is connected on the sliding channel both sides by hook, and baffle plate forwards to level, and the battery in the sliding channel is slid out, is convenient to the replacement of battery.

One side of the discharge port is provided with a film inlet nozzle (see Figure 5). The film inlet nozzle has a pointed mouth that guides the lithium battery into the film. The pointed mouth is composed of multiple elastic pieces. The pointed mouth It is used for aligning the lithium battery and the film belt, and speeds up the pushing speed of the lithium battery.

As shown in Figure 5, the two sides of the discharge channel 38 are provided with adjustment clamping ports, and the two adjustment clamping ports are provided with synchronously moving alignment splints 37, and the alignment splints have clamping protrusions acting on the end of the lithium battery. From 39. In order to adjust the length of the coating at both ends of the lithium battery, the adjustment clamping port is set on both sides of the discharge channel, and the lithium battery is clamped by the aligning splint that moves synchronously, and the clamping protrusion extends into the film belt to push the lithium battery. At the end, adjust the position of the lithium battery in the membrane belt, so that the length of the coating at both ends of the lithium battery is the same, and the leveling work is completed.

The upper part of the discharge passage covers the installation frame 40, and the lower part of the installation frame 40 is fixed with a limiting plate 41 extending along the discharge passage. When the cylinder pushes the cylindrical lithium battery to roll, the limit plate keeps the lithium battery passing in a single row in the discharge channel, avoiding the overlapping of the lithium battery due to extrusion and affecting the leveling of the film belts at both ends of the lithium battery.

The side of the discharge channel is provided with a drive cylinder that pushes the aligning splint 37. By installing the drive cylinder on both sides of the discharge channel, the two aligning splints are pushed toward each other to clamp the lithium battery and adjust the lithium battery in the film belt. Location.

In another embodiment, one side of the discharge channel 38 is provided with a cylinder for pushing the alignment clamp on this side, and the alignment clamp 37 moves synchronously with the alignment clamp on the other side through the connecting rod assembly. The connecting rod assembly includes a support rod 42 connecting one side to align the splint, a movable rod 43 that is connected with the support rod 42 and passes through the discharge channel, and a swing rod 45 that is hinged on the support base 44 in the middle; one end of the swing rod 45 It is hinged on the end of the movable rod 43, and the other end is hinged on the alignment splint on the other side. In this embodiment, only one cylinder is used to drive the alignment splint on one side, and the alignment splint on the other side is synchronized through the connecting rod assembly, and the two cylinders are pushed at the same time, which has better synchronization and saves energy consumption.

The support rod 42 and the side of the discharge channel are provided with a return spring 46. The return spring 46 is used to adjust the reset power of the splint, accelerate the return of the adjustment splint, and avoid improper return of the adjustment splint, which will affect the transportation of lithium batteries in the discharge channel. .

As shown in FIG. 6 , an elastic pressing plate 47 is provided above the discharge channel 38 , and the elastic pressing plate 47 has a material blocking portion 50 extending to the discharge opening of the discharge channel, and a counterweight 48 is placed above the elastic pressing plate. The retaining part of the elastic pressure plate is pressed on the lithium battery at the discharge port to prevent the free sliding of the lithium battery and prevent two adjacent lithium batteries from sticking to each other and rolling down to the conveyor belt of the drying tunnel, which will affect the shrinkage quality of the film. ; Due to the obstruction of the elastic pressure plate, the cylinder continuously pushes the lithium battery from the feeding place of the discharge channel, squeezes the lithium battery at the discharge port to overcome the pressure of the elastic pressure plate, and slides to the conveyor belt of the drying tunnel, keeping the energy on the conveyor belt Lithium batteries are evenly distributed.

A baffle plate 49 for placing a counterweight 48 is provided above the elastic pressing plate 47 for fixing the position of the counterweight. In order to better place the balance weight on the elastic pressure plate, a material stop cover can also be set above the elastic pressure plate to limit the position of the balance weight from multiple sides, so as to avoid the vibration of the elastic pressure plate and cause the displacement of the balance weight or drop.

The material blocking cover is slidably fitted on the elastic pressure plate, and is kept fixed with the elastic pressure plate by positioning bolts. The material blocking cover slides and fits along the elastic pressure plate, and the position of the counterweight is adjustable. The position of the counterweight can be adjusted according to lithium batteries of different weights, so that the pressure of the elastic pressure plate adapts to the gravity of the lithium battery and prevents the lithium battery from sliding down.

One end of the elastic pressure plate 47 is connected to the mounting plate 51 above the discharge channel 38, and the other end extends to the discharge port of the discharge channel and is pressed on the lithium battery to form a stopper 50 that limits the sliding of the lithium battery. The discharge channel 38 is discharged through deformation of the extrusion blocking portion.

The other end of the elastic pressing plate 47 is an arc-shaped plate bent downwards to the discharge port, which has a better blocking effect and controls only one lithium battery to pass through at a time. The retaining part 50 is in the shape of a tree branch, and the middle part is a hollow gap. By acting on the two ends of the lithium battery, the balance of the lithium battery is maintained and the lithium battery is prevented from tilting and sliding out.

The above descriptions are only examples of the preferred implementation of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of the new protection.

Claims (10)

1. A lithium battery plastic packaging equipment, comprising a base, is characterized in that, the base is provided with: The film supply mechanism has two turntables for placing the roll film, each turntable is provided with a tension wheel and an extrusion part for pre-expanding the flat roll film in turn on the film release path corresponding to the turntable; The film cutting mechanism is arranged on the film release path, and is equipped with a film pulling component for pulling the roll film and a cutter for cutting the film into sections; Coating workbench, the described coating workbench is provided with the suction membrane component that is pulled apart by rolling film, and is used for pushing out the lithium battery that completes coating; The feeding mechanism has a single-row feeding channel for conveying lithium batteries, and the end of the feeding channel is provided with a cylinder that pushes the lithium batteries into the unrolled film; The discharge mechanism has a discharge channel for pushing the cylinder to push out the lithium battery. The two sides of the discharge channel are provided with alignment splints to adjust the position of the lithium battery in the film. The end of the discharge channel is provided with a Elastic pressure plate. 2. The lithium battery overmolding equipment according to claim 1, wherein the tensioning wheel is mounted on the base at the lower part of the turntable through an elastic support rod. 3. Lithium battery overmolding equipment as claimed in claim 1, is characterized in that, extruding part comprises two movable rotating rollers, between two rotating rollers is roll film to pass through channel, and this roll film passes through the width of channel smaller than the diameter of the membrane. 4. The lithium battery overmolding equipment according to claim 1, wherein the film pulling assembly includes a sliding seat sliding along the base, a film passing channel is arranged in the sliding seat, and a film passing channel is arranged above the film passing channel Lifting clip, the top of the lifting clip is fixed with a guide rod extending vertically to the outside of the sliding seat, and the guide rod is covered with a spring that keeps the lifting clip pressed down. 5. The lithium battery overmolding equipment as claimed in claim 4, wherein the film pulling assembly and the cutter are matched by a lever, one end of the lever is connected to the top of the cutter, and the other end is used for cutting When the knife is pressed down, the lifting clamp is guided to rise. 6. The lithium battery overmolding equipment according to claim 1, wherein the film suction assembly includes a vacuum suction plate embedded on the coating workbench, and the vacuum suction plate is distributed with film suction ports, A movable lifting arm is installed above the coating workbench, and the lifting arm is equipped with a vacuum suction cup matched with a vacuum suction plate. 7. The lithium battery overmolding equipment according to claim 1, wherein the two ends of the feeding channel respectively have a high feeding level and a low discharging level; One side of the discharge position is provided with a discharge port, and the other side is equipped with the push cylinder; The sliding channel between the feeding level and the discharging level is provided with a pressing plate that limits the passage of lithium batteries in a single row, and a reclaiming cover that covers the sliding channel. 8. The lithium battery overmolding equipment as claimed in claim 7, characterized in that, one side of the discharge port is provided with a film-feeding guide nozzle, and the film-feeding guide nozzle has a pointed mouth that guides the lithium battery into the film part, the pointed mouth part is made up of multiple pieces of elastic pieces. 9. The lithium battery overmolding equipment as claimed in claim 1, characterized in that, both sides of the discharge channel are provided with adjustment clamping ports, and two adjusting clamping ports are provided with synchronously moving alignment splints , the alignment splint has a clamping protrusion acting on the end of the lithium battery. 10. The lithium battery overmolding equipment according to claim 1, wherein the elastic pressing plate has a material blocking portion extending to the discharge opening of the discharge channel, and a counterweight is placed above the elastic pressing plate.