CN108001962B

CN108001962B - Vertical battery cell conveyor, vertical battery cell coating machine and coating method thereof

Info

Publication number: CN108001962B
Application number: CN201711498788.3A
Authority: CN
Inventors: 张正初; 韩志荣; 靳贺凯; 郑冬冬
Original assignee: Suzhou Juyi Intelligent Equipment Co ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2017-12-28
Filing date: 2017-12-28
Publication date: 2023-06-27
Anticipated expiration: 2037-12-28
Also published as: CN108001962A

Abstract

The invention discloses a vertical battery cell conveyor, a vertical battery cell coating machine and a coating method thereof, wherein the vertical battery cell conveyor comprises two symmetrical brackets which are arranged at intervals, main rods of the brackets extend along a first axis direction and are matched to form a supporting groove for placing battery cells, and the vertical battery cell conveyor further comprises a lifting forward device for driving all battery cells in the supporting groove to synchronously lift and separate from the bottom of the supporting groove, then move forwards for a certain distance and fall back to the bottom of the supporting groove. According to the invention, the battery cell is kept vertical and can not fall through the supporting groove, the battery cell is conveyed by adopting the air cylinder, the start and stop control is not needed by combining the sensor, the circuit structure is simplified, meanwhile, the influence of number limiting delay is not controlled, the battery cell can be accurately moved to the target position, the influence of errors in the position of the battery cell on the subsequent processing precision is avoided, the processing precision is favorably ensured, the position consistency of each battery cell to be processed is ensured, and the consistency of the final coating quality is ensured.

Description

Vertical battery cell conveyor, vertical battery cell coating machine and coating method thereof

Technical Field

The invention relates to the field of logistics sorting, in particular to a vertical battery cell conveyor, a vertical battery cell coating machine and a coating method thereof.

Background

The new energy industry has become the mainstream development trend of automobile manufacturers at present, and the new energy industry is becoming an emerging industry with wide market prospect under the strong support of the nation.

The lithium battery is used as a core part of a new energy automobile, the market demand is increased, the battery core is used as an electrified product, and the lithium battery is used in the automobile industry with extremely high safety requirements, so that the safety is ensured in all cases.

The adhesive tape (battery cell protective film) is widely used as an insulating medium for battery cell protection by lithium battery manufacturers, but the manual film coating of the battery cells greatly limits the production efficiency of the battery cells, and the influence of artificial uncontrollable factors in the film coating process on the film coating greatly limits the production yield of the battery cells.

Therefore, the coating efficiency is improved, the coating quality is ensured to be necessary, and the corresponding development of the high-efficiency high-yield high-quality automatic battery cell coating equipment has important significance for the development of the lithium battery industry.

The existing automatic battery cell coating equipment basically needs to convey the battery cells through a conveying line, and the existing conveying line, such as a belt type conveying line, often needs to be combined with a sensor or used for determining whether the battery cells are conveyed to a feeding position by controlling the rotation number of a motor and the like, so that the complexity of a control circuit of the equipment caused by the sensor is increased, and the control difficulty is high; meanwhile, due to the signal transmission process, certain delay often exists in the stop of the transmission line, so that a certain error exists between the actual feeding position of the battery core and the optimal target position, and a certain deviation exists between the position of the battery core and the position of the battery core protection film during subsequent coating, thereby influencing the precision of subsequent coating operation and adversely affecting the final coating quality.

Moreover, when the battery cell is placed on the conveying line manually, the distance between the battery cells on the conveying line cannot be controlled accurately, and if the starting and stopping of the motor are controlled in a sensor-free mode, the subsequent battery cells cannot be conveyed to the target feeding position accurately.

In addition, most of the surfaces of the cells coated by the existing coating equipment at present have bubbles, which affect the thickness of the cells and influence the subsequent cell process, and the equipment cost is high, and the efficiency cannot meet the yield.

Furthermore, when the existing coating equipment is used for coating the battery cells, the battery cells are often in a horizontal state (namely, a large side surface of the battery cells is taken as a supporting surface) so as to be convenient for conveying in the coating process, and the battery cells are often required to be in a vertical state on a conveying line for feeding and discharging, so that the battery cells are required to be switched between the vertical state and the horizontal state in the automatic coating process, the processing steps are more complicated, the automatic coating equipment is required to be correspondingly switched, the whole structure of the equipment is more complicated, and meanwhile, the stable clamping of the horizontal battery cells is difficult relative to the vertical battery cells.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a vertical battery cell conveyor, a vertical battery cell coating machine and a coating method thereof.

The aim of the invention is achieved by the following technical scheme:

the vertical type battery cell conveyor comprises two symmetrical brackets which are arranged in a clearance way, a main rod of the vertical type battery cell conveyor extends along the first axis direction and is matched with the main rod to form a supporting groove for placing battery cells, and the vertical type battery cell conveyor further comprises a lifting forward moving device which drives all battery cells in the supporting groove to move forward for a certain distance after being separated from the bottom of the supporting groove and then fall back to the bottom of the supporting groove.

Preferably, a group of limiting blocks are arranged on the inner wall of the main rod in equal gaps, and limiting grooves matched with the widths of the battery cells are formed in adjacent limiting blocks.

Preferably, the lifting forward device comprises a cross rod which can extend into the supporting groove from the bottom of the supporting groove, a group of convex cushion blocks are arranged on the cross rod at equal intervals, and clamping grooves matched with the battery cells are formed adjacent to the cushion blocks; the cross bar is also connected to a power device that drives the cross bar to move in a first axial direction and in a second axial direction.

Preferably, the power device comprises an adapter plate connected with the cross rod, two ends of the adapter plate are respectively and slidably arranged on a linear guide rail extending along the second axis direction through sliding blocks, the adapter plate is connected with a jacking cylinder driving the adapter plate to slide, the jacking cylinder is arranged on a base plate, and the base plate is slidably arranged on a guide rail extending along the first axis direction and connected with a cylinder driving the adapter plate to slide along the guide rail.

The invention further aims to provide a vertical battery cell film coating machine which comprises the battery cell vertical conveyor, a self-correcting film feeding mechanism and a film coating mechanism, wherein the battery cell vertical conveyor and the film coating mechanism enable the battery cell to be always in a vertical state.

Preferably, the self-correcting film feeding mechanism at least comprises two automatic unreeling machines for selecting one feeding and an auxiliary material changing mechanism for switching the feeding of the two automatic unreeling machines.

Preferably, the self-correcting film feeding mechanism controls the servo motor to drive the two guide rollers for supporting the cell protection film to horizontally rotate through feeding back the position of the cell protection film by the ultrasonic sensor so as to automatically correct the cell protection film.

Preferably, the coating mechanism comprises a bottom surface film pasting device, a large side surface film pasting device and a small side surface film pasting device, wherein the bottom surface film pasting device, the large side surface film pasting device and the small side surface film pasting device are used for pasting films on the bottom surface, the two large side surfaces and the two small side surfaces of the battery cell step by step; the battery cell feeding device and the battery cell switching device are matched with the battery cell moving to the bottom surface film pasting device, the large side surface film pasting device and the small side surface film pasting device.

Preferably, the large-side film laminating device comprises two film laminating rollers which are equal in height and are arranged in parallel, the film laminating rollers are arranged in a clearance mode, the clearance between the film laminating rollers is smaller than the thickness of the battery cell in a normal state, the two film laminating rollers can move back under the acting force of the battery cell positioned in the clearance between the film laminating rollers, and the two large sides of the battery cell can be synchronously pressed under the action of a compression spring connected with the film laminating rollers.

Preferably, the small-side film sticking device comprises a folding angle mechanism for folding the battery cell protective film extending out of the large side surface and the bottom surface of the battery cell into the small side surface of the battery cell and forming a triangular folding structure in the bottom area, and a film rolling mechanism for applying pressure to the folded battery cell protective film to make the folded battery cell protective film and the small side surface of the battery cell respectively stick to each other; the film rolling mechanism comprises a first pressing mechanism and a second pressing mechanism which are oppositely arranged and respectively apply pressure to two small side surfaces of the battery cell.

Preferably, the electric core feeding device comprises a feeding electric cylinder, a sliding block of the feeding electric cylinder slides back and forth along the second axis direction, a switching frame is arranged on the sliding block, and a clamping jaw with a downward opening and driven by a clamping jaw cylinder is connected to the switching frame.

Preferably, the electric core switching device comprises a switching electric cylinder, wherein the sliding block of the switching electric cylinder slides back and forth along the second axis direction and is provided with an L-shaped frame, and the L-shaped frame is connected with a switching clamping jaw with an upward opening and driven by the switching air cylinder.

Preferably, the battery cell packaging machine further comprises a battery cell transplanting device, wherein the battery cell transplanting device is used for taking out the battery cells which are subjected to packaging from the packaging mechanism, and the battery cells are kept in a vertical state by the battery cell transplanting device.

The invention also aims to provide an automatic cell coating method which comprises the following steps, wherein in each step, the cell is in a vertical state,

s0, arranging a battery cell protection film perpendicular to the battery cell on a moving path of the battery cell by the self-correcting film feeding mechanism;

s1, a battery cell feeding device clamps a battery cell from a qualified material conveyor and moves towards the direction of a battery cell protection film so that the bottom surface of the battery cell is attached to the battery cell protection film;

s2, the bottom surface film pasting device drives a bottom surface press roller to repeatedly roll the battery cell protective film attached to the bottom surface of the battery cell;

s3, the film pressing mechanism and the film pulling mechanism loosen the clamped battery cell protective film, and two film pressing rollers of the large-side film sticking device 19 move to the film coating position;

s4, the battery cell feeding device continuously drives the battery cell to move into the gap between the two film pressing rollers, and feeding is stopped when the lower half part of the large side surface of the battery cell is covered by the battery cell protective film;

s5, the film pressing mechanism clamps the battery cell protection film, and the film cutting mechanism cuts off the battery cell protection film between the film pressing mechanism and the film pulling mechanism;

s6, the battery core is clamped and fixed by moving the switching clamping jaw of the battery core switching device, the battery core feeding device releases the battery core, and the battery core switching device moves the battery core downwards until the battery core exits from the gap between the two film pressing rollers, so that the film coating of the two large sides is completed;

s7, the battery core switching device drives the battery core with the bottom surface and the large side surface coated to move down to the small side surface film pasting device, and the small side surface film pasting device is rolled to finish the small side surface film pasting after the small side surface battery core protection film is folded;

s8, the clamping jaw of the battery cell transplanting device moves the battery cell with the coating film from the small-side film pasting device to a battery cell vertical conveyor for blanking.

The technical scheme of the invention has the advantages that:

the invention has the advantages that the design is exquisite, the structure is simple, the supporting groove can keep the battery core in a vertical state without toppling over, the battery core is conveyed by adopting the air cylinder, the starting and stopping control is not needed by combining a sensor, the circuit structure is simplified, meanwhile, the influence of number limiting delay is not controlled, the battery core can be accurately moved to a target position, the influence of errors of the battery core position on the subsequent processing precision is avoided, the processing precision is favorably ensured, the position consistency of each battery core to be processed is ensured, and the consistency of the final coating quality is ensured.

The limiting groove is formed in the supporting groove, so that the position of the battery cell can be effectively limited to be dead, the battery cell can be placed manually, and on the other hand, the gap between the battery cells can be fixed, so that the accuracy of the follow-up battery cell conveying is guaranteed.

According to the film coating machine, the battery cell is always in the vertical state in the whole process, so that the step of switching the battery cell between the vertical state and the lying state and the corresponding equipment structure are omitted, the equipment structure and the operation process are simplified, and the film coating efficiency is improved; meanwhile, the battery cell in the vertical state is easier to stably clamp through the clamping jaw, so that the reliability of movement of the battery cell among stations of the coating is ensured.

According to the invention, the automatic and accurate positioning of the battery cell is realized through the vertical conveyor, and the self-correcting film feeding mechanism is combined, so that the centering precision of the battery cell and the adhesive tape is effectively ensured, and the quality of the film coating is ensured.

By improving the rolling structure of the battery cell protection film, the battery cell protection film and each surface to be encapsulated of the battery cell can be tightly and smoothly attached, the bubble-free fold on the rear surface of the battery cell encapsulation is ensured, and the quality and the attractiveness of the product are improved.

The film coating machine adopts double-channel film coating, the integration level of equipment is higher, and the processing efficiency is improved by times.

Drawings

FIG. 1 is a top view of a vertical cell coating machine of the present invention;

FIG. 2 is a perspective view of the vertical conveyor of the present invention;

FIG. 3 is a perspective view of the internal structure of the vertical conveyor for battery cells of the present invention;

FIG. 4 is a schematic diagram of a cell weighing module according to the present invention;

FIG. 5 is a front view of the self-correcting common mode mechanism of the present invention (the film pressing mechanism, the film pulling mechanism and the film cutting mechanism are not shown);

FIG. 6 is a rear view of the self-correcting common mode mechanism of the present invention (the film pressing mechanism, the film pulling mechanism and the film cutting mechanism are not shown);

FIG. 7 is a perspective view of the film coating mechanism, film pressing mechanism, film pulling mechanism and film cutting mechanism of the present invention;

FIG. 8 is an enlarged perspective view of the film pressing mechanism, the film pulling mechanism, the film cutting mechanism and the bottom surface film sticking device of the present invention;

FIG. 9 is a perspective view of a large-side film laminating apparatus of the present invention;

FIG. 10 is a perspective view of the angle mechanism of the present invention;

FIG. 11 is a perspective view of the film rolling mechanism of the present invention;

fig. 12 is a perspective view of the cell feeding device of the present invention;

fig. 13 is a perspective view of a battery cell switching device according to the present invention;

fig. 14 is a perspective view of the battery cell transplanting device of the present invention.

Detailed Description

The objects, advantages and features of the present invention are illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of the technical scheme of the invention, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the invention.

In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The vertical type battery cell coating machine of the invention is described below with reference to the accompanying drawings, and as shown in the accompanying drawings, the vertical type battery cell coating machine comprises a battery cell vertical type conveyor 1, an automatic weighing mechanism 2, a self-correcting film supply mechanism 4 and a coating mechanism 3, wherein the battery cell vertical type conveyor 1, the automatic weighing mechanism 2 and the coating mechanism 3 enable battery cells to always keep in a vertical state, and the vertical state refers to a state that when the battery cells are placed on a horizontal plane, polar cylindrical surfaces of the battery cells are upward, a surface opposite to the polar cylindrical surfaces is used as a supporting surface, and when the surface is parallel to the horizontal plane, the battery cells correspond to the battery cells.

As shown in fig. 1, the number of the vertical cell conveyors 1 is 4, wherein two 1A and 1B are used for feeding, and the other two 5A and 5B are used for discharging; the automatic weighing mechanism 2, the self-correcting film feeding mechanism 4 and the film coating mechanism 3 are respectively two, namely the automatic weighing

mechanisms

2A and 2B of the vertical type battery cell conveyor, the self-correcting

film feeding mechanisms

4A and 4B and the

film coating mechanisms

3A and 3B are matched in position, so that double-channel film coating can be realized, the equipment integration level is improved, and meanwhile, the processing efficiency is improved.

As shown in fig. 2 and fig. 3, the vertical conveyor 1 for electric core includes two symmetrical supports 255 disposed in a gap, the supports 255 include a main rod 2551 extending along a first axis direction X and two supports 2553 perpendicular to the main rod 2551, raised strips 2554 are formed at bottoms of opposite side walls of the main rod 2551 of the two supports 255, they cooperate to form a supporting slot 256 for placing the electric core 100 and having an opening at the bottom, a set of limiting blocks 2552 are disposed on an inner wall of the main rod 2551 in a gap-equalizing manner, and adjacent limiting blocks 2552 form limiting slots for limiting a movement degree of freedom of an electric core in the first axis direction X, that is, a gap distance between adjacent limiting blocks 2552 is similar to a width of the electric core.

As shown in fig. 2, the vertical cell conveyor 1 further includes a lifting and advancing device for driving all the cells 100 in the supporting slot 256 to synchronously lift and move forward a certain distance after being separated from the bottom of the supporting slot 256 and then fall back to the bottom of the supporting slot 256.

Referring to fig. 2 and 3, the lifting and advancing device includes a cross bar 257 that can extend into the bottom opening of the supporting slot 256, a group of convex cushion blocks 258 are disposed on the cross bar 257 at equal intervals, a clamping slot matched with the battery core is formed adjacent to the cushion blocks 258, the cross bar 257 is further connected with a power device that drives the cross bar 257 to move along the first axis direction X and move along the second axis direction Z, and the power device can be a known structure capable of performing multi-axis movement, such as a structure in which two linear modules are vertically arranged or a structure in which the linear modules are matched with a cylinder.

In a preferred embodiment, as shown in fig. 2 and fig. 3, the power device includes an adapter plate 2510 connected to the cross bar 257, two ends of the adapter plate 2510 are slidably disposed on linear guide rails 253 extending along the second axis direction Z through sliding blocks 2520, the linear guide rails 253 are disposed on a support, the support is symmetrically disposed on a base plate 259, the adapter plate 2510 is connected to a lifting cylinder 252 driving the adapter plate to slide, the lifting cylinder 252 is also disposed on the base plate 259, and the base plate 259 is slidably disposed on a guide rail 251 extending along the first axis direction X and connected to a cylinder 254 driving the adapter plate to slide along the guide rail 251, which may be an electric cylinder or an oil cylinder or other devices or structures in other embodiments.

When carrying the battery cells, the battery cells are respectively clamped in the clamping grooves formed by the adjacent cushion blocks 258, at the moment, the jacking cylinder 252 jacks up to enable all the battery cells positioned on the cross rod 257 to move upwards and move out of the corresponding limiting grooves, at the moment, the cylinder 254 starts to drive the cross rod 257 to move for a set distance along the first axis direction X and then stops, the jacking cylinder 252 retracts to enable the battery cells positioned on the cross rod 257 to fall back into the limiting grooves positioned in front of the original limiting grooves respectively, and the cylinder drives the cross rod 257 to move and reset to prepare for next feeding.

The automatic weighing mechanism 2 is used for detecting the weight of the battery cell before coating, as shown in fig. 4, and comprises a weighing machine 7, a qualified material conveyor 8, a NG blanking machine 9 and three grabbing clamping jaws 210 which are arranged at equal intervals, wherein the three grabbing clamping jaws 210 are respectively driven by a driving cylinder 220 to reciprocate along a second axis direction Z, and are arranged on a moving mechanism 6 for driving the grabbing clamping jaws to synchronously move along the horizontal direction.

Specifically, the weighing machine 7 comprises an electronic scale 71 and an auxiliary tool 72 for keeping the battery cell in a vertical state, the qualified material conveyor 8 comprises a battery cell clamp 81, the battery cell clamp is arranged on a rodless cylinder 82, and the NG blanking machine 9 realizes equidistant carrying and feeding of the battery cell by serial movement of two vertically arranged telescopic cylinders; the moving mechanism 6 includes a gantry 61, an air cylinder 62 is disposed on the gantry 61, a fixed plate 63 is disposed on a piston rod of the air cylinder 62, and three gripping claws 210 are disposed on the fixed plate 63, which may be other feasible structures, and will not be described herein.

When the automatic weighing mechanism 2 works, the moving mechanism 6 firstly moves the three grabbing clamping jaws 210 to the left limiting position respectively, so that the leftmost grabbing clamping jaw 210 is positioned above the battery core at the forefront end of the battery core vertical conveyor 1, the middle-position grabbing clamping jaw 210 is positioned above the weighing machine 7, the rightmost grabbing clamping jaw 210 is positioned above the battery core clamp 81 of the qualified material conveyor 8, the leftmost grabbing clamping jaw 210 moves downwards to grab and lift the battery core, then the moving mechanism 6 drives the three grabbing clamping jaws 210 to move reversely to reset, at the moment, the leftmost grabbing clamping jaw 210 is positioned above the weighing machine 7 and moves downwards to place the battery core on the weighing machine 7 for weighing, the leftmost grabbing clamping jaw 210 moves upwards to reset and moves again to the upper side of the battery core vertical conveyor 1, meanwhile, the middle-position grabbing clamping jaw 210 moves to the battery core clamp of the qualified material conveyor 8, when weighing is qualified, the rodless cylinder 82 starts to carry out battery core conveying, when the battery core is unqualified, and when the battery core is unqualified and the battery core is not fed, the battery core is not fed to the qualified and the battery core is fed down to the qualified machine is moved down.

Before the cell is required to be coated after being conveyed in place, the cell protection film 200 needs to be supplied in place, the width of the cell protection film is larger than the sum of the width and the thickness of the cell, and during coating, the cell is positioned in the middle of the cell protection film, as shown in fig. 5 and 6, the self-correcting film supply mechanism 4 comprises a vertical plate 131, and the vertical plate 131 is provided with

Two automatic unreeling machines 11 for supplying the cell protection films, which have a height difference and are fed alternatively;

the auxiliary material changing mechanism 10 is used for switching the feeding materials of the two automatic unreeling machines 11;

the floating tensioning mechanism is used for enabling the battery cell protective film to be in a tensioning state and comprises a counterweight mechanism 12 and a group of rollers 13 used for guiding;

the adhesive tape deviation correcting mechanism 14 is used for controlling the centering precision of the battery cell protective film and the battery cell;

the film pressing mechanism 16 is used for clamping and fixing the cell protection film passing through the film pressing mechanism;

the film pulling mechanism 17 is used for pulling a path of the battery cell protection film clamped by the film pressing device to move through the battery cell;

and the film cutting mechanism 20 is used for cutting off the cell protection film between the film pressing mechanism and the film pulling mechanism.

Specifically, as shown in fig. 5 and 6, the automatic unreeling machine 11 includes a unreeling shaft 101 rotatably disposed on the vertical plate 131, the unreeling shaft 101 is connected with a power device for driving the unreeling shaft to work, and the power device is preferably a structure formed by a motor 111, a synchronous wheel, a synchronous belt and a driven wheel, and of course, the unreeling shaft can also be a structure formed by an independent motor or a motor+gear pair.

As shown in fig. 5, the auxiliary material changing mechanism 10 includes a film changing plate 102, a film changing sensor 103 and a film pressing plate 104, where the film changing sensor 103 is located below the film changing plate 102 and between the two unwinding shafts 101, the film pressing plate 104 is rotatably disposed at a side edge of the riser 131, and can apply pressure to the film pressing plate 104, the film changing sensor 103 detects a mark for indicating that the battery core protection film on the roll is about to run out, and when the film changing sensor 103 detects the mark, the material feeding is stopped, and an alarm reminds a worker to perform roll material switching, and during material changing, the top protection film on the other unwinding shaft 101 is seamlessly connected to the original top protection film through the film changing plate, then the original top protection film is disconnected from the roll material, and the used roll material is replaced again.

As shown in fig. 5 and 6, a set of rollers 13 in the floating tensioning mechanism are vertically arranged on the vertical plate 131, and are used for supporting the battery cell protection film together and setting the space trend of the adhesive tape, and the free end of the rollers 13 is provided with a limiting disc coaxial with the cylinder body of the rollers 13 and used for limiting the position of the battery cell protection film on the rollers 13.

As shown in fig. 5 and fig. 6, the weight mechanism 12 is located between the automatic unreeling machine 11 and the tape deviation rectifying mechanism 14, and includes a waist-shaped hole 123 extending along a second axis direction Z provided on the riser 131, a weight roller 124 perpendicular to the riser 131 is inserted into the waist-shaped hole 123, one end of the weight roller 124 extending to the back of the riser 131 is connected with a weight block 121, and the weight block 121 is slidably disposed on a guide sliding rail 122 extending along the second axis direction Z provided on the back of the riser 131, so that the cell protection film 200 is always in a tensioned state, and when the film is pulled, the cell protection film is prevented from being wrinkled.

As shown in fig. 5, the tape deviation rectifying mechanism 14 controls the servo motor 143 to drive the two guide rollers 142 for supporting the cell protective film to horizontally rotate through the ultrasonic sensor 141 in response to the position of the cell protective film so as to automatically rectify the cell protective film, the guide rollers 142 are arranged on a bracket, and the bracket is driven to rotate by the servo motor 143.

As shown in fig. 7 and 8, the film pressing mechanism 16 includes a first claw 162 and a second claw (not shown) which cooperate to clamp or release the cell protection film therebetween, the first claw 162 is connected with a cylinder 161 which drives the first claw 162 to reciprocate along the second axis direction Z, and a group of notches 163 are formed at the front ends of the first claw 162 and the second claw.

As shown in fig. 7 and 8, the film pulling mechanism 17 includes a pneumatic clamping jaw 173 that normally keeps a gap with two clamping jaws of the film pressing mechanism 16, the pneumatic clamping jaw 173 is arranged at the same height as the two clamping jaws of the film pressing mechanism 16, and a notch 174 matching with the notch 163 on the first clamping jaw 162 and the second clamping jaw is formed at the front end of the pneumatic clamping jaw 173, and the two clamping jaws can be mutually embedded; the pneumatic clamping jaw 173 is connected with a driving cylinder 172 for driving the clamping or loosening of the pneumatic clamping jaw, the driving cylinder 172 is fixed on a mounting bracket 175, and the mounting bracket 175 is arranged on an electric cylinder 171 for driving the pneumatic clamping jaw to reciprocate along a third axis direction Y.

As shown in fig. 7 and 8, the film cutting mechanism 20 is located below the film pressing mechanism 16, and includes a blade 201, the cutting edge of the blade 201 is close to the front end of the jaw of the film pressing mechanism 16, the blade 201 is disposed on an L-shaped bracket 204, and the cutting edge of the blade is higher than a battery cell protection film between the film pressing mechanism 16 and the film pulling mechanism 17, the L-shaped bracket 204 is slidably disposed on a linear guide rail 202 extending along a first axis direction X, and is connected to a rodless cylinder 203 driving the L-shaped bracket to slide reciprocally along the linear guide rail 202.

When film is supplied, the winding materials of two rolls of the battery cell protection films are respectively fixed on the unwinding shaft 101, the battery cell protection film of one roll of the winding materials is torn to the film pressing mechanism 16 according to a path shown in fig. 5, the battery cell protection film is fixed by the film pressing mechanism 16, the pneumatic clamping jaws 173 of the film pulling mechanism 17 move towards the clamping jaws of the film pressing mechanism 16 and are embedded into the gaps of the clamping jaws, the pneumatic clamping jaws 173 clamp the battery cell protection film fixed by the film pressing mechanism 16, then the battery cell protection film is loosened by the film pressing mechanism 16, the film pulling mechanism 17 drives the pneumatic clamping jaws 173 to move reversely and reset, so that the battery cell protection film is pulled, at the moment, the battery cell protection film parallel to a plane formed by the first axis direction X and the third axis direction Y is filled between the film pressing mechanism 16 and the film pulling mechanism 17, the battery cell protection film is perpendicular to the moving path of the battery cell, and the length of the battery cell protection film pulled out by the film pulling mechanism 17 from the film pressing mechanism 16 meets the following conditions: after cutting, the battery cell can be at least coated with the bottom surface and two large side surfaces of the battery cell.

When a battery cell is coated, a section of battery cell protection film with a fixed length is used, and before or while the film pulling mechanism 17 pulls the film, the automatic unreeling machine 11 can be matched with the counterweight mechanism 12 to release a section of battery cell protection film, so that the automatic supply of the battery cell protection film is realized.

After the cell protection film is supplied in place, the film coating mechanism 3 can perform film coating, specifically, as shown in fig. 7, the film coating mechanism 3 includes a bottom surface film coating device 18, a large side surface film coating device 19 and a small side surface film coating device for coating the bottom surface, two large side surfaces and two small side surfaces of the cell step by step; the battery cell feeding device 15 and the battery cell switching device 21 are matched with the battery cell moving to the bottom surface film pasting device 18, the large side surface film pasting device 19 and the small side surface film pasting device.

As shown in fig. 8, the bottom film attaching device 18 is configured to apply pressure to the bottom surface of the battery cell to attach to the bottom surface of the battery cell, and includes a bottom pressing roller 183 located below the film pressing mechanism 16, where the bottom pressing roller 183 extends along the first axis direction X and is rotatably disposed on a support, and the support is slidably mounted on a linear rail 181 moving along the third axis direction Y and connected to a telescopic cylinder 182 driving the linear rail 181 to slide reciprocally.

As shown in fig. 9, the large-side film laminating device 19 is configured to apply pressure to the cell protection film in the directions of two large sides of the cell, and is disposed below the film pulling mechanism 17 and includes two film pressing rollers 192 disposed in parallel and having the same height, where the two film pressing rollers 192 extend along the first axis direction X and are located at the gap between the film pressing mechanism 16 and the film pulling mechanism 17, where the gap is disposed and is normally smaller than the thickness of the cell, and where the two film pressing rollers 192 can move away from the cell in the gap under the action of a pressing spring 194 connected to them and apply pressure to the two large sides of the cell simultaneously.

As shown in fig. 9, two ends of the film pressing roller 192 are respectively slidably mounted on two sliding rails 195 through sliding members, two sliding members 196 of each film pressing roller 192 are respectively connected with one end of a pressing spring 194, and the two sliding rails 195 are slidably disposed on a longitudinal rail 198 extending along the second axis direction Z through a connecting block 197 and are connected with a guide rod cylinder 193 for driving the longitudinal rail 198 to reciprocally slide along the longitudinal rail 198.

As shown in fig. 7, the small-side film laminating device is located below the large-side film laminating device 19, and includes a folding mechanism 22 for folding the cell protection film extending out of the large side and the bottom surface of the cell into the small side of the cell and forming a triangular folding structure in the bottom area, and a film rolling mechanism 23 for applying pressure to the folded cell protection film to make the folded cell protection film be respectively attached to the small side of the cell.

Specifically, as shown in fig. 10, the angle folding mechanism 22 includes two pushing blocks 221 disposed at intervals, the intervals between the two pushing blocks 221 are matched with the widths of the electric cores, they are disposed on a bracket 227, the bracket 227 is connected with a driving cylinder 222 driving the driving cylinder to reciprocate along the second axis direction Z, the angle folding mechanism 22 further includes a two-way cylinder 223 with a fixed position, two sliding blocks of the two-way cylinder 223 are respectively connected with an L-shaped connecting piece 224, a vertical plate 2241 extending along the second axis direction Z of the two L-shaped connecting pieces 224 is respectively located at the outer side of one pushing block 221, and the upper end of each vertical plate 2241 is connected with a clamping jaw 226 driven by the clamping jaw cylinder 225.

As shown in fig. 11, the film rolling mechanism 23 is disposed above the corner folding mechanism, and includes a first pressing mechanism and a second pressing mechanism that are disposed opposite to each other and apply pressure to two small sides of the battery cell, where the first pressing mechanism and the second pressing mechanism are disposed opposite to each other and in a gap.

The first pressing mechanism comprises a U-shaped pushing frame 234, the U-shaped forked ends of the U-shaped pushing frame 234 are respectively connected with a support plate 235 extending along the second axis direction Z, two support plates 235 are respectively connected with a floating roller 232 extending along the second axis direction Z, the length of the floating roller 232 is greater than the height of the battery cell, and the gap between the two floating rollers 232 is matched with the width of the battery cell; the U-shaped pushing frame 234 is slidably disposed on a linear rail 233 extending along the third axis direction Y, and is connected to a driving cylinder 231 for driving the linear rail 233 to slide.

The second pressing mechanism comprises a U-shaped carriage 237 slidably arranged on the linear guide rail 233, two U-shaped forked ends of the U-shaped carriage 237 are respectively connected with a floating roller 238 extending along the second axis direction Z through an adapter plate 236, the length of the floating roller 238 is greater than the height of the battery cell, the gap between the two floating rollers 238 is matched with the width of the battery cell, and the U-shaped carriage 237 is connected with a second driving cylinder 239 driving the second driving cylinder to slide reciprocally along the linear guide rail 233.

As shown in fig. 7 and 12, the electrical core feeding device 15 is disposed above the film pressing mechanism 16, and is used for clamping an electrical core for downward conveying along a second axis direction X, and comprises a feeding electrical cylinder 151, the feeding electrical cylinder 151 is disposed on a portal frame 155, a sliding block of the feeding electrical cylinder 151 slides reciprocally along the second axis direction Z, and is provided with a transfer frame 154, a clamping jaw 153 with a downward opening and driven by a jaw cylinder 152 is connected to the transfer frame 154, and the feeding electrical cylinder 151 can drive the clamping jaw 153 to move to a gap between the film pressing mechanism 16 and the film pulling mechanism 17, and can enable at least a lower half part of a large side surface of the electrical core to be covered by an electrical core protection film.

As shown in fig. 7 and 13, the battery core switching device 21 is disposed below the film pressing mechanism 16, and is configured to receive the battery core conveyed by the battery core feeding device 15 and drive the battery core to move along the second axis direction Z, and includes a switching electric cylinder 213, the switching electric cylinder 213 extends below the small-side film pasting device, a slider of the switching electric cylinder 213 slides reciprocally along the second axis direction Z and is provided with an L-shaped frame thereon, and the L-shaped frame is connected with a switching clamping jaw 211 with an upward opening and driven by a switching cylinder 212, and the switching electric cylinder 213 can drive the switching clamping jaw 211 to move to a gap between the film pressing mechanism 16 and the film pulling mechanism 17 and receive the battery core with a lower half of a bottom surface and a large side passing through the film.

Further, the vertical battery cell coating machine also comprises a battery cell transplanting device 24, which is used for taking out the battery cells which are coated from the coating mechanism 3 and moving the battery cells to a battery cell vertical conveying line for blanking; the cell transplanting device 24 is located between the film pulling mechanism 17 and the small-side film coating device, and comprises a guide sliding rail 243 extending along the X-axis direction, a support plate 245 extending along the third extending direction Y is slidably arranged on the guide sliding rail 243, the support plate 245 is connected with a rodless cylinder 242 driving the support plate 245 to slide along the guide sliding rail 243, and the extending end of the support plate 245 is connected with a clamping jaw 244 with a downward opening and driven by the cylinder 241.

The specific coating process comprises the following steps:

s1, the feeding electric cylinder 151 drives the clamping jaw 153 to clamp the electric core 100 from the electric core clamp 81 of the qualified material conveyor 8, at the moment, the clamping jaw clamps the upper part of the electric core 100, the clamped electric core 100 moves towards the direction of the electric core protection film 200 between the film pressing mechanism 16 and the film pulling mechanism 17, and the electric core 100 stops when the bottom surface of the electric core 100 is attached to the electric core protection film 200.

S2, the telescopic cylinder 182 of the bottom surface film sticking device 18 drives the bottom surface press roller 183 to move towards the bottom surface direction of the battery cell 100, the battery cell protective film attached to the bottom surface of the battery cell is repeatedly rolled by the bottom surface press roller 183 to enable the battery cell protective film to be closely attached to the bottom surface of the battery cell, and after rolling, the bottom surface press roller 183 resets to wait for the next press roller.

S3, the first clamping jaw 162 of the film pressing mechanism 16 moves upwards to loosen the battery cell protection film, the pneumatic clamping jaw 173 of the film pulling mechanism 17 loosens the clamped battery cell protection film, and the guide rod cylinder 193 of the large-side film sticking device 19 drives the two film pressing rollers 192 to move to the film coating position.

S4, the feeding electric cylinder 151 continues to drive the battery cell to move downwards into the gap between the two film pressing rollers 192 of the large-side film pasting device 19, and along with continuous feeding of the feeding electric cylinder 151, the two film pressing rollers 192 apply pressure to one large side of the battery cell respectively, so that the battery cell protection film is attached to the large side of the battery cell gradually, and when the lower half part of the large side of the battery cell is coated, the feeding electric cylinder 151 stops feeding.

S5, the first claw 162 of the film pressing mechanism 16 moves downwards to be matched with the second claw to clamp the battery cell protection film, and the rodless cylinder 203 of the film cutting mechanism 20 drives the blade 201 to move towards the direction of the battery cell protection film to cut off the battery cell protection film, and then the battery cell protection film is reset.

S6, a transfer electric cylinder 213 of the battery cell transfer device 21 drives the transfer clamping jaw 211 to move to a high position to clamp the large side surface of the battery cell to cover the lower part of the battery cell protective film, the clamping jaw 153 loosens the battery cell and resets, the transfer electric cylinder 213 drives the battery cell to move downwards, at the moment, the two film pressing rollers 192 continuously cover the upper half part of the large side surface of the battery cell by the battery cell protective film, the film coating of the two large side surfaces is completed, and the film pressing rollers 192 reset.

S7, driving the battery core with the bottom surface and the large side surface coated by the switching battery cylinder to move down to the small side surface film sticking device, firstly folding the small side surface battery core protection film, and then rolling to finish the small side surface film sticking, wherein the specific steps are as follows:

and S71, the switching cylinder 213 drives the battery core with the finished bottom surface and the large side surface coated to move downwards to the folding mechanism 22, the driving cylinder 222 of the folding mechanism 22 drives the two pushing blocks 221 to move towards the bottom surface of the battery core, the battery core protection films extending out of the bottom surface of the battery core are distributed and pushed into the small side surface of the battery core, the bidirectional cylinder 223 of the folding mechanism 22 drives the two clamping jaws 226 to move towards the two small side surfaces of the battery core at the same time and to be close to the small side surfaces, the two clamping jaw cylinders 225 drive the two clamping jaws 226 to shrink so as to clamp the battery core protection films extending out of the large side surface of the battery core, then the bidirectional cylinder 223 drives the two clamping jaws 226 to move reversely, so that the battery core protection films extending out of the large side surface of the battery core are distributed and pushed into the small side surfaces of the battery core, a triangular folding structure is formed at the position of the small side surface of the battery core, the triangular folding structure is the same as the triangular folding structure formed by the outer packaging films of various boxed products, and after the folding mechanism is reset.

And S72, the switching cylinder 213 drives the battery cell with the small side battery cell protection film corner to move up to the film rolling mechanism 23.

S73, a driving cylinder 231 of the first pressing mechanism drives the U-shaped pushing frame 234 to drive the two floating rollers 232 to respectively roll the two small sides of the battery cell and then reset, and a second driving cylinder 239 of the second pressing mechanism drives the U-shaped sliding frame 237 to drive the two floating rollers 238 to respectively roll the two small sides of the battery cell and then reset.

S8, a rodless cylinder 242 of the battery cell transplanting device drives a clamping jaw 244 to move to a battery cell with a coating completed, the cylinder 241 drives the clamping jaw 244 to clamp the battery cell, the switching clamping jaw 211 of the battery cell switching device 21 is loosened, and the rodless cylinder 242 drives the clamping jaw 244 to move the battery cell to a battery cell vertical conveyor for blanking.

The invention has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the invention.

Claims

1. Vertical electric core coating machine, its characterized in that: the automatic film-feeding device comprises a vertical battery cell conveyor (1), an automatic weighing mechanism (2), a self-correcting film-feeding mechanism (4) and a film-coating mechanism (3), wherein the vertical battery cell conveyor (1), the automatic weighing mechanism (2) and the film-coating mechanism (3) enable a battery cell to be always in a vertical state; the vertical battery cell conveyor comprises two symmetrical and gap-arranged brackets (255), wherein main rods (2551) of the brackets extend along a first axis direction (X) and are matched to form a supporting groove (256) for placing battery cells (100), and the vertical battery cell conveyor further comprises a lifting and advancing device for driving all battery cells (100) in the supporting groove (256) to synchronously lift and separate from the bottom of the supporting groove (256) and then move forwards for a certain distance and fall back to the bottom of the supporting groove (256);

the coating mechanism (3) comprises a bottom surface film pasting device (18), a large side surface film pasting device (19) and a small side surface film pasting device which are used for pasting films on the bottom surface, the two large side surfaces and the two small side surfaces of the battery cell step by step; the battery cell laminating device also comprises a battery cell feeding device (15) and a battery cell switching device (21) which are matched with the battery cell laminating device (18) on the bottom surface, the large-side surface laminating device (19) and the small-side surface laminating device.

2. The vertical cell coating machine according to claim 1, wherein: a group of limiting blocks (2552) are arranged on the inner wall of the main rod (2551) in equal gaps, and limiting grooves matched with the widths of the battery cells are formed adjacent to the limiting blocks (2552).

3. The vertical cell coating machine according to claim 1, wherein: the lifting forward device comprises a cross rod (257) which can extend into the supporting groove (256) from the bottom of the supporting groove, a group of convex cushion blocks (258) are arranged on the cross rod (257) at equal intervals, and clamping grooves matched with the battery cells are formed adjacent to the cushion blocks (258); the crossbar (257) is also connected to a power means for driving it in a first axial direction (X) and in a second axial direction (Z).

4. The vertical cell coating machine according to claim 3, wherein: the power device comprises an adapter plate (2510) connected with the cross rod (257), two ends of the adapter plate (2510) are respectively arranged on a linear guide rail (253) extending along the second axis direction (Z) in a sliding mode through sliding blocks (2520), the adapter plate (2510) is connected with a jacking cylinder (252) driving the adapter plate to slide, the jacking cylinder (252) is arranged on a base plate (259), and the base plate (259) is arranged on a guide rail (251) extending along the first axis direction (X) in a sliding mode and is connected with a cylinder (254) driving the base plate to slide along the guide rail (251).

5. The vertical cell coating machine according to claim 1, wherein: the self-correcting film feeding mechanism (4) at least comprises two automatic unreeling machines (11) for selecting one feed and an auxiliary material changing mechanism for switching the feeds of the two automatic unreeling machines (11).

6. The vertical cell coating machine according to claim 1, wherein: the self-correcting film feeding mechanism (4) controls the servo motor (143) to drive the two guide rollers (142) for supporting the cell protection film to horizontally rotate through the position of the ultrasonic sensor (141) feedback cell protection film so as to automatically correct the cell protection film.

7. The vertical cell coating machine according to claim 1, wherein: the large-side film laminating device (19) comprises two film pressing rollers (192) which are equal in height and are arranged in parallel, the film pressing rollers are arranged in a clearance mode, the clearance between the film pressing rollers is smaller than the thickness of the battery cell in a normal state, the two film pressing rollers (192) can move back under the acting force of the battery cell positioned in the clearance between the film pressing rollers, and pressure is synchronously applied to two large sides of the battery cell under the action of a compression spring (194) connected with the film pressing rollers.

8. The vertical cell coating machine according to claim 1, wherein: the small-side film pasting device comprises a folding angle mechanism (22) for folding the battery cell protective film extending out of the large side surface and the bottom surface of the battery cell into the small side surface of the battery cell and forming a triangular folding structure in the bottom area, and a film rolling mechanism (23) for applying pressure to the folded battery cell protective film to enable the folded battery cell protective film to be respectively pasted with the small side surface of the battery cell; the film rolling mechanism (23) comprises a first pressing mechanism and a second pressing mechanism which are oppositely arranged and respectively apply pressure to two small sides of the battery cell.

9. The vertical cell coating machine according to claim 1, wherein: the battery cell feeding device (15) comprises a feeding electric cylinder (151), a sliding block of the feeding electric cylinder (151) slides back and forth along a second axis direction (Z) and is provided with a switching frame (154), and a clamping jaw (153) with a downward opening and driven by a jaw air cylinder (152) is connected to the switching frame (154).

10. The vertical cell coating machine according to claim 1, wherein: the battery cell switching device (21) comprises a switching electric cylinder (213), a sliding block of the switching electric cylinder (213) slides back and forth along a second axis direction (Z) and is provided with an L-shaped frame, and the L-shaped frame is connected with a switching clamping jaw (211) with an upward opening and driven by a switching air cylinder (212).

11. The vertical cell coating machine according to claim 1, wherein: the battery cell transplanting device (24) is used for taking out the battery cells which are coated with the film from the coating mechanism (3), and the battery cell transplanting device (24) keeps the battery cells in a vertical state.

12. The automatic battery cell coating method adopts the vertical battery cell coating machine as claimed in claim 1, and is characterized in that: comprises the following steps, wherein in each step, the battery cell is in a vertical state,

s1, clamping a battery cell from a qualified material conveyor by a battery cell feeding device, and attaching the bottom surface of the battery cell to a battery cell protection film;

s2, the bottom surface film pasting device drives the bottom surface compression roller to repeatedly roll the battery cell protection film attached to the bottom surface of the battery cell;

s3, loosening the clamped battery cell protective film by the film pressing mechanism and the film pulling mechanism, and moving two film pressing rollers of the large-side film sticking device to the film coating position;

s4, the battery cell feeding device continuously drives the battery cell to move into a gap between the two film pressing rollers, and feeding is stopped when the lower half part of the large side surface of the battery cell is covered by the battery cell protective film;