CN114976188A - Circulating type multi-station laminated battery cell circulation production line - Google Patents

Abstract

The invention discloses a circulating multi-station laminated battery cell circulation production line, which relates to the technical field of battery cell laminated production equipment and comprises a circulating laminated conveying mechanism, two groups of positive and negative pole piece die-cutting mechanisms and a CCD (charge coupled device) aligning mechanism, wherein the two groups of positive and negative pole piece die-cutting mechanisms are symmetrically distributed along the same side of the circulating laminated conveying mechanism, a pole piece conveying mechanism is arranged at a discharge port of the positive and negative pole piece die-cutting mechanisms, the upper surface of the pole piece conveying mechanism is used for conveying the same type of pole piece, and the lower surface of the pole piece conveying mechanism is used for conveying the other type of pole piece. According to the circulation production line of the circulating multi-station laminated battery cell, the die cutting mechanisms of the positive and negative pole pieces are arranged on the same side of the circulating laminated conveying mechanism, so that the daily model changing, debugging and maintaining of the laminating equipment are facilitated. The positive and negative pole piece die-cutting mechanism can output the positive pole piece and the negative pole piece simultaneously, and the CCD alignment platform is arranged on the same side of the positive and negative pole piece die-cutting mechanism, so that the space utilization rate of a production line is improved, and the equipment space is reduced.

Description

Circulating type multi-station laminated battery cell circulation production line

Technical Field

The invention relates to the technical field of battery cell lamination production equipment, in particular to a circulating type multi-station lamination battery cell circulation production line.

Background

In the production process of lithium batteries, hydrogen batteries and solar batteries, a laminating machine is required to stack and form pole pieces and diaphragms, and then follow-up procedures are carried out. With the rapid development of new energy, the size of the battery core is also continuously increased, and the demand of each enterprise on the power battery is increased day by day, and the demand is far greater than the capacity. Under the promotion of national policies, enterprises of new energy resources have hundreds of flowers, and along with the rising of automobile output, the demand of a matched power battery core group is exponentially multiplied, so that the efficiency of the conventional battery core production equipment is difficult to meet the requirements of the existing market.

Most of the existing battery cell lamination equipment adopts a form of back-and-forth folding molding to produce laminated battery cells, and pole pieces are continuously conveyed to the battery cell lamination equipment to be laminated by matching with pole piece conveying belts horizontally arranged on two sides. However, each transportation device is only responsible for die cutting of the single-polarity pole pieces, and the CCD alignment platforms are arranged in the directions of two sides of the lamination device, so that the whole production line occupies a large area, and the production efficiency of the production line is low. And the lamination equipment is positioned between the two pole piece transportation equipment, and the daily model change, debugging and maintenance of the lamination equipment are inconvenient.

Disclosure of Invention

The invention aims to at least solve the problem that in the prior art, each piece of transportation equipment is only responsible for die cutting of a single-polarity pole piece, and the CCD alignment platforms are arranged at two sides of the lamination equipment, so that the whole production line occupies a large area, and the production efficiency of the production line is low. And the lamination equipment is positioned between two pieces of pole piece transportation equipment, and the replacement, debugging and maintenance of the lamination equipment are inconvenient in daily life. Therefore, the invention provides a circulating multi-station laminated battery cell circulation production line, the laminating equipment can realize circulating flow laminating operation, and the laminating efficiency is higher. And the pole piece transportation equipment is arranged on the same side of the lamination equipment, so that two types of pole pieces can be produced simultaneously, the arrangement of a CCD alignment platform is optimized, the space utilization rate is improved, and the daily model changing, debugging and maintenance of the lamination equipment are facilitated.

A cyclical, multi-station, laminated cell flow line according to some embodiments of the present invention comprises:

the device comprises a circulating type lamination conveying mechanism, a plurality of lamination stations are arranged on the surface of the circulating type lamination conveying mechanism, and a diaphragm unwinding deviation rectifying mechanism and a hot-rolling laminating mechanism are correspondingly arranged above each lamination station;

the two groups of positive and negative pole piece die cutting mechanisms are symmetrically distributed along the same side of the circulating type lamination conveying mechanism, a pole piece conveying mechanism is arranged at a discharge port of the positive and negative pole piece die cutting mechanisms, the upper surface of the pole piece conveying mechanism is used for conveying the same type of pole piece, and the lower surface of the pole piece conveying mechanism is used for conveying the other type of pole piece;

and the CCD alignment mechanism is arranged between the circulating type lamination conveying mechanism and the pole piece conveying mechanism, one side of the CCD alignment mechanism is provided with a mechanical arm, and the mechanical arm is used for carrying the pole piece to the CCD alignment mechanism and then to the lamination station.

According to some embodiments of the invention, the battery pack comprises a plurality of battery cell trays, the battery cell trays are closely arranged and transported on the belt surface of the circulating lamination transport mechanism, and the battery cell trays sequentially pass through each lamination station.

According to some embodiments of the invention, the positive and negative pole piece die cutting mechanism comprises a positive pole die cutting assembly and a negative pole die cutting assembly, and the pole piece transport mechanism comprises a positive pole transport assembly and a negative pole transport assembly; the positive electrode conveying assembly is arranged corresponding to the discharge hole of the positive electrode die cutting assembly and is used for conveying positive electrode plates; the negative pole transportation assembly corresponds to the discharge port of the negative pole die cutting assembly and is used for transporting the negative pole piece.

According to some embodiments of the invention, the positive die cutting assembly comprises a pole piece unwinding mechanism, a plurality of guide roller sets, a pole piece fillet cutting mechanism, a roller feeding mechanism, a pole piece cutting mechanism and a CCD size detection mechanism; the pole piece belt of the pole piece unreeling mechanism is conveyed to the pole piece fillet cutting mechanism through the guide roller set, conveyed to the pole piece cutting mechanism through the roller conveying mechanism and finally enters the positive electrode conveying assembly through the CCD size detection mechanism; the structure of the negative electrode die-cutting assembly is the same as that of the positive electrode die-cutting assembly, and the pole piece of the negative electrode transportation assembly finally enters the negative electrode transportation assembly.

According to some embodiments of the invention, the positive transport assembly comprises a scrap piece separating conveyor belt and at least one section of horizontal transport belt, the scrap piece separating conveyor belt being in communication with the horizontal transport belt; when the positive pole piece is conveyed by the waste piece separation conveying belt, the waste piece separation conveying belt unloads the failed positive pole piece; and the positive pole piece is transported along the upper surface of the horizontal transport belt, and the manipulator transports the positive pole piece from the upper surface to the CCD aligning mechanism.

According to some embodiments of the invention, the negative electrode transport assembly comprises an outfeed transport belt and an adsorption transport belt, the outfeed transport belt being in communication with the negative electrode die cut assembly, the adsorption transport belt being in communication with the outfeed transport belt; the negative pole piece enters the lower surface of the adsorption conveying belt through the discharge conveying belt and is conveyed along the lower surface of the adsorption conveying belt, and the manipulator conveys the negative pole piece from the lower surface to the CCD aligning mechanism or the CCD aligning mechanism extends to the lower part of the lower surface of the adsorption conveying belt.

According to some embodiments of the invention, the cell tray comprises a tray base, a surface of the tray base being provided with at least one lamination area; two groups of pole piece compressing devices are respectively arranged on two sides of each lamination area and are used for compressing pole pieces on the lamination areas; the pole piece pressing device comprises a pressing cutter piece and a driving mechanism, the pressing cutter piece comprises a positive pressing cutter and a negative pressing cutter, and the driving mechanism is used for driving the positive pressing cutter and the negative pressing cutter to alternately press the pole pieces on the lamination area.

According to some embodiments of the invention, the tray base is provided with mounting holes corresponding to two sides of the lamination area, and the knife pressing pieces are mounted on two sides of the lamination area through the mounting holes; a movable rod extends from the joint of the positive pressure knife and the negative pressure knife, and moves up and down in the mounting hole; the bottom of the movable rod is provided with a limiting seat, an elastic piece is sleeved on the rod body of the movable rod and is positioned between the limiting seat and the tray base, and the elastic piece is used for automatically pressing the cutter pressing piece; the driving mechanism is in transmission connection with the bottom of the movable rod and is used for driving the cutter pressing piece to lift or rotate for a certain angle.

According to some embodiments of the invention, a primary diaphragm unwinding deviation correcting mechanism is arranged on one side of the starting position of the circulating lamination conveying mechanism, a diaphragm of the primary diaphragm unwinding deviation correcting mechanism is laid on the surface of the battery cell tray, and the circulating lamination conveying mechanism drives the diaphragm of the primary diaphragm unwinding deviation correcting mechanism to sequentially pass through the lamination station; the hot rolling laminating positioning mechanism is used for heating glue between the diaphragm and the pole piece so as to fix the positions of the pole piece and the diaphragm.

According to some embodiments of the present invention, the CCD alignment mechanism is provided with at least one set of pole piece alignment stations, and the manipulator simultaneously carries the pole pieces on each of the pole piece alignment stations to the lamination station.

According to some embodiments of the invention, the circulation type multi-station lamination battery cell circulation production line at least has the following beneficial effects: positive and negative pole piece die-cutting mechanisms are arranged on the same side of the circulating type lamination conveying mechanism, and daily model changing, debugging and maintaining of lamination equipment are facilitated. The positive and negative pole piece die cutting mechanism can output a positive pole piece and a negative pole piece simultaneously, the CCD alignment platform and the positive and negative pole piece die cutting mechanism are arranged on the same side, the space utilization rate of a production line is improved, and the space of equipment is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a side view of a circulation type multi-station lamination cell circulation production line according to an embodiment of the present invention;

fig. 2 is a top view of a circulation type multi-station lamination cell circulation production line according to an embodiment of the present invention;

FIG. 3 is an internal schematic view of a positive and negative electrode plate die-cutting mechanism according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a cell tray according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view of a portion a of fig. 4.

Reference numerals:

a circulating type lamination conveying mechanism 100, a primary diaphragm unwinding deviation correcting mechanism 110, a diaphragm unwinding deviation correcting mechanism 120, a hot rolling covering mechanism 130,

A battery cell tray 200, a tray base 210, a mounting hole 211, a lamination area 212, a pole piece pressing device 220, a pressing knife piece 221, a positive electrode pressing knife 221-1, a negative electrode pressing knife 221-2, a movable rod 222, a limiting seat 223, an elastic piece 224, a battery cell, a,

A positive and negative pole piece die cutting mechanism 300, a positive pole die cutting assembly 310, a negative pole die cutting assembly 320, a pole piece unreeling mechanism 331, a guide roller set 332, a pole piece round angle cutting mechanism 333, a roller feeding mechanism 334, a pole piece cutting mechanism 335, a CCD dimension detection mechanism 336,

Pole piece conveying mechanism 400, horizontal conveying belt 411, waste piece separating conveyer belt 412, discharging conveyer belt 421, adsorbing conveyer belt 422, CCD contraposition mechanism 500, pole piece contraposition station 510.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, top, bottom, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A cyclical multi-station laminated cell circulation production line according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1-5, the circulating multi-station laminated battery cell circulation production line includes a circulating laminated transportation mechanism 100 responsible for battery cell lamination molding, two sets of positive and negative electrode plate die cutting mechanisms 300 responsible for manufacturing positive and negative electrode plates, and a CCD alignment mechanism 500 responsible for aligning the electrode plates. The pole piece is moved among the three by a manipulator (not shown in the drawing) to form a complete cell production line.

Specifically, the surface of the circulating lamination conveying mechanism 100 is provided with a plurality of lamination stations (not shown in the drawings), and a membrane unwinding deviation rectifying mechanism 120 and a hot rolling laminating mechanism 130 are correspondingly arranged above each lamination station. When the circulating type lamination conveying mechanism 100 drives the diaphragm to the lamination station, the manipulator carries the pole piece to the diaphragm of the lamination station, then the diaphragm unreeling deviation correcting mechanism 120 unreels a new diaphragm to the top of the pole piece, the diaphragm and the pole piece are heated and fixed through the hot-roll laminating mechanism 130, and the circulating type lamination conveying mechanism 100 drives the pole piece and the diaphragm to the next lamination station for lamination operation. And circulating the steps for a specified number of times to form the battery cell, and finally cutting the diaphragm between the adjacent laminations through the diaphragm cutting mechanism to form a plurality of monomer battery cells and then carrying out subsequent treatment on the monomer battery cells.

Before being transported to the lamination station, the pole pieces need to be manufactured by the positive and negative pole piece die cutting mechanism 300 and transported to the CCD alignment mechanism 500 by a robot for alignment. Specifically, in order to improve the lamination efficiency of the production line, the invention adopts two sets of positive and negative pole piece die cutting mechanisms 300 which are symmetrically distributed to manufacture the pole pieces, the pole pieces manufactured by the positive and negative pole piece die cutting mechanisms 300 positioned at the front half section of the circulating type lamination conveying mechanism 100 are supplied to the lamination station at the front half section for use, and the pole pieces manufactured by the positive and negative pole piece die cutting mechanisms 300 at the rear half section of the circulating type lamination conveying mechanism 100 are supplied to the lamination station at the rear half section for use, so that the lamination efficiency of the circulating type lamination conveying mechanism 100 is effectively improved.

The positive and negative pole piece die-cutting mechanism 300 can simultaneously feed the positive pole and the negative pole, and compared with the existing single-type pole piece feeding equipment, the positive and negative pole piece die-cutting mechanism 300 can greatly improve the production efficiency of a production line, reduce the occupied space of production line equipment and improve the space utilization rate. Specifically, the discharge gate department of every positive and negative pole piece die-cutting mechanism 300 of group is provided with pole piece transport mechanism 400, and pole piece transport mechanism 400 includes two-layer belt transport from top to bottom, and the upper surface of upper belt transport is used for transporting same type pole piece, and the lower surface of lower floor's belt transport is used for transporting another type of pole piece, and in this embodiment, the upper surface of pole piece transport mechanism 400 transports positive pole piece, and the lower surface is responsible for transporting negative pole piece, can effectively reduce the space of pole piece feedway, promotes space utilization.

When the pole pieces are conveyed to the pole piece conveying mechanism 400, the manipulator continuously conveys the positive pole piece and the negative pole piece to the lamination station. Specifically, the CCD alignment mechanism 500 is disposed between the circulating lamination conveying mechanism 100 and the pole piece conveying mechanism 400, and a group of CCD alignment mechanisms 500 is disposed correspondingly to each lamination station. The manipulator is arranged on one side of the CCD aligning mechanism 500 and used for carrying the pole piece from the pole piece conveying mechanism 400 to the CCD aligning mechanism 500 and then to the lamination station.

According to the layout form of the mechanisms, all the mechanisms are ensured to be positioned at the same side of the circulating lamination conveying mechanism 100, the floor area of equipment can be effectively reduced, and the other side of the circulating lamination conveying mechanism 100 is provided with enough space, so that workers can perform debugging, maintenance, model changing and other operations on the equipment in daily life.

The circulating multi-station laminated battery cell circulation production line adopts an assembly line lamination mode to fold, the laminated sheets move from head to bottom on the circulating laminated sheet conveying mechanism 100, namely, the laminated sheets are stacked to form single battery cells, and then diaphragms of adjacent battery cells are cut to form the single battery cells.

It should be understood that the positive and negative electrode sheet die-cutting mechanism 300 is not the only embodiment, and in some other embodiments, a single positive and negative electrode sheet die-cutting mechanism 300 may be used to cover all the lamination stations on the circulating lamination transportation mechanism 100 according to actual production requirements, specifically selected according to the length of the production line of the circulating lamination transportation mechanism 100, and when the length is too long, multiple positive and negative electrode sheet die-cutting mechanisms 300 may be used to manufacture the electrode sheets, so as to improve the lamination efficiency of the production line. The number and layout of the positive and negative pole piece die-cutting mechanisms 300 are not described in detail, and it should be understood that the number and layout of the positive and negative pole piece die-cutting mechanisms 300 can be flexibly changed without departing from the basic concept of the present invention, and all the changes should be considered to be within the protection scope defined by the present invention.

In some embodiments of the present invention, as shown in fig. 1 and 2, a plurality of cell trays 200 are included, the cell trays 200 are transported in close-packed arrangement on the belt face of the endless lamination transport mechanism 100, and the cell trays 200 pass through each lamination station in sequence. Specifically, the cell trays 200 are closely arranged on the conveyor belt of the endless lamination conveying mechanism 100, the separator is laid on the surface of the cell trays 200, and the cell trays 200 sequentially pass through the lamination stations along with the conveyor belt, so that a plurality of cell laminations are formed on the cell trays 200. Finally, after lamination is completed, the diaphragm between the electric cores on the electric core tray 200 is cut and subjected to subsequent heat treatment, so that processing of a plurality of electric cores is completed, the processed electric cores are separated from the electric core tray 200, and the electric core tray 200 flows back to the initial position of the circulating type lamination conveying mechanism 100.

In a further embodiment, as shown in fig. 4 and 5, the cell tray 200 includes a tray base 210, a surface of the tray base 210 being provided with at least one lamination area 212; the two sides of each lamination area 212 are respectively provided with two groups of pole piece pressing devices 220, and the pole piece pressing devices 220 are used for pressing pole pieces on the lamination areas 212; the pole piece pressing device 220 includes a pressing knife 221 and a driving mechanism (not shown in the drawings), the pressing knife 221 includes a positive pressing knife 221-1 and a negative pressing knife 221-2, and the driving mechanism is configured to drive the positive pressing knife 221-1 and the negative pressing knife 221-2 to alternately press the pole pieces on the lamination area 212.

Specifically, the cell tray 200 includes two parts, namely a tray base 210 and a pole piece pressing device 220, the surface of the tray base 210 is provided with at least one lamination area 212, in this embodiment, the surface of one cell tray 200 is provided with three lamination areas 212, which can simultaneously carry three groups of laminations for batch movement, and the lamination station can laminate a plurality of lamination areas 212 at a time. After the pole piece lamination is accomplished, carry electric core tray 200 through the aftertreatment manipulator and can once only remove three group's laminations and get into next manufacturing procedure, promoted the production machining efficiency of lamination production line, promote production speed. Specifically, the number of lamination areas 212 of the cell tray 200 can be adjusted according to lamination production lines of different specifications, and the number of lamination areas 212 can be two, four, or five, and so on, and it should be understood that the number of lamination areas 212 can be flexibly changed without departing from the basic concept of the present invention, and all of them should be considered to be within the protection scope defined by the present invention.

Because the film is thin, the lamination process is not beneficial to the subsequent steps of cutting, heat treatment and the like on the conveyer belt, and the production efficiency is low. And battery core tray 200 can bear pole piece and lamination, makes battery core lamination cutting and forming process all accomplish on the surface of tray base 210, because tray base 210 is the stereoplasm surface, can bear film and pole piece well, and it is also more convenient to cut the film process, effectively promotes lamination production efficiency.

Two sets of pole piece pressing devices 220 are respectively arranged on two sides of each lamination area 212, and the pole piece pressing devices 220 are used for pressing pole pieces on the lamination areas 212. Specifically, the number of the pole piece pressing devices 220 is set corresponding to the number of the lamination areas 212, two sets of the pole piece pressing devices 220 are set corresponding to two sides of each lamination area 212, and each side of the lamination area 212 is pressed by the two sets of the pole piece pressing devices 220, that is, four sets of the pole piece pressing devices 220 are set on one lamination area 212. It should be noted that, in the present embodiment, the two sides of the lamination area 212 refer to the two sides of the lamination area 212 extending perpendicular to the moving direction of the production line. In other embodiments, the pole piece pressing device 220 can further be provided with a set of pole piece pressing devices 220 at the middle positions of two sides of the lamination area 212, and the stacked pole pieces and the diaphragms are pressed by the sets of pole piece pressing devices 220 at two sides, and it should be understood that the number of the pole piece pressing devices 220 can be flexibly changed without departing from the basic concept of the present invention, and the protection scope of the present invention is defined.

The pole piece pressing device 220 includes a pressing knife 221 and a driving mechanism (not shown in the drawings), the pressing knife 221 includes a positive pressing knife 221-1 and a negative pressing knife 221-2, the positive pressing knife 221-1 is used for pressing the positive lamination and the diaphragm of the lamination area 212, and the negative pressing knife 221-2 is used for pressing the negative lamination and the diaphragm of the lamination area 212. Specifically, the driving mechanism is used for driving the positive pressing knife 221-1 and the negative pressing knife 221-2 to alternately press the pole pieces and the diaphragm on the lamination area 212. The pressing knife pieces 221 on two sides of the lamination area 212 act simultaneously, and when the lamination area 212 is laminated and stacked with the positive pole piece, the driving mechanism of the four-group pole piece pressing device 220 controls the pressing knife pieces 221 to be switched to the positive pole pressing knife 221-1 and presses the positive pole piece and the diaphragm on the lamination area 212. When the negative pole piece is stacked in the stacking area 212, the driving mechanism of the four-set pole piece pressing device 220 controls the pressing knife 221 to switch to the negative pressing knife 221-2 and presses the negative pole piece and the diaphragm on the stacking area 212. The pressing knife piece 221 compresses the pole pieces and the diaphragm on the lamination area 212 by alternately switching the positive pressing knife 221-1 and the negative pressing knife 221-2, so that the cross contamination of materials between the positive pole piece and the negative pole piece can be effectively avoided. Due to the fact that the positive pole piece and the negative pole piece are made of different materials, materials of different pole pieces are adhered to the pressing knife through the common pressing knife, and the materials of the different pole pieces are brought to other pole pieces, so that cross contamination of the materials between the two pole pieces is caused, and the yield of the laminated sheet is reduced. The positive pole pressing knife 221-1 and the negative pole pressing knife 221-2 can realize the pressing operation of different pole pieces, and solve the problem of pole piece cross contamination.

In a further embodiment, as shown in fig. 4 and 5, the tray base 210 is provided with mounting holes 211 corresponding to both sides of the lamination area 212, and the knife pressing pieces 221 are mounted on both sides of the lamination area 212 through the mounting holes 211; a movable rod 222 extends from the connection part of the positive pole pressing knife 221-1 and the negative pole pressing knife 221-2, and the movable rod 222 moves up and down in the mounting hole 211; the bottom of the movable rod 222 is provided with a limiting seat 223, the rod body of the movable rod 222 is sleeved with an elastic piece 224, the elastic piece 224 is positioned between the limiting seat 223 and the tray base 210, and the elastic piece 224 is used for enabling the knife pressing piece 221 to be automatically pressed; the driving mechanism is in transmission connection with the bottom of the movable rod 222 and is used for driving the knife pressing piece 221 to lift or rotate for a certain angle.

Specifically, the tray base 210 is provided with mounting holes 211 corresponding to both sides of the lamination area 212, and the knife pressing pieces 221 are mounted on both sides of the lamination area 212 through the mounting holes 211. Specifically, the mounting holes 211 are located on two sides of the lamination area 212, and the mounting holes 211 distributed on the same side are spaced at a certain distance to ensure that the two pole piece pressing devices 220 on the same side do not interfere with each other.

The connecting part of the positive pole pressing knife 221-1 and the negative pole pressing knife 221-2 is provided with a movable rod 222 in an extending way, and the movable rod 222 moves up and down in the mounting hole 211. Specifically, the movable rod 222 extends perpendicularly to the tool surfaces of the two pressing knives, the diameter of the movable rod 222 is not larger than that of the mounting hole 211, and the movable rod 222 penetrates through the mounting hole 211 and can drive the pressing knife 221 to move up and down along the extending direction of the mounting hole 211. When the movable lever 222 moves upward, the pressing blade 221 moves away from the surface of the pole piece, and when the movable lever 222 rotates, the pressing blade 221 switches the position of the positive electrode blade or the negative electrode blade.

The bottom of the movable rod 222 is provided with a limiting seat 223, the rod body of the movable rod 222 is sleeved with an elastic member 224, the elastic member 224 is located between the limiting seat 223 and the tray base 210, the elastic member 224 is used for automatically pressing the knife pressing member 221, and in this embodiment, the elastic member 224 is a spring. Specifically, the stopper seat 223 is connected to the bottom of the movable rod 222, the diameter of the stopper seat 223 is larger than that of the movable rod 222, and the elastic member 224 is located between the bottom of the tray base 210 and the stopper seat 223. The elastic member 224 is always in a tensioned state, so that the pole piece compressing device 220 realizes automatic compression, and when the external force of the driving mechanism to the movable rod 222 is removed, the elastic member 224 drives the pressing knife 221 to automatically press down so as to compress the pole pieces in the lamination area 212. The driving mechanism pushes the movable rod 222 to ascend, so that the elastic member 224 compresses and the pressing blade 221 moves away from the surface of the pole piece to switch the positive pressing blade 221-1 or the negative pressing blade 221-2.

The driving mechanism is in transmission connection with the bottom of the movable rod 222 and is used for driving the knife pressing piece 221 to lift or rotate for a certain angle. In this embodiment, the driving mechanism uses a motor or a push rod to drive the pressing knife 221 to lift or rotate to switch the positive and negative pressing knives 221-2. Specifically, a micro-push rod may be used to push the movable rod 222 to move up and down, and the motor drives the micro-push rod to rotate a certain angle so as to drive the knife pressing element 221 to rotate a certain angle. The present invention does not need to describe the specific structure of the driving mechanism any more, and it should be understood that the specific structure of the driving mechanism can be flexibly changed without departing from the basic concept of the present invention, and should be considered to be within the protection scope defined by the present invention.

In some embodiments of the present invention, as shown in fig. 1, a primary membrane unwinding deviation rectifying mechanism 110 is disposed on one side of an initial position of the circulating lamination conveying mechanism 100, a membrane of the primary membrane unwinding deviation rectifying mechanism 110 is laid on a surface of the battery cell tray 200, and the circulating lamination conveying mechanism 100 drives the membrane of the primary membrane unwinding deviation rectifying mechanism 110 to sequentially pass through the lamination station. The hot rolling laminating positioning mechanism is used for heating glue between the diaphragm and the pole piece so as to fix the positions of the pole piece and the diaphragm.

In some embodiments of the present invention, as shown in fig. 2 and 3, the CCD alignment mechanism 500 is provided with at least one set of pole piece alignment stations 510, and the robot arm simultaneously carries the pole pieces on each pole piece alignment station 510 to the lamination station. In this embodiment, the number of the pole piece alignment stations 510 of the CCD alignment mechanism 500 is equal to the number of the lamination areas 212 of the cell tray 200, and the CCD alignment mechanism 500 can align a plurality of pole pieces and carry the pole pieces to the cell tray 200 at one time, thereby improving the lamination production efficiency.

In some embodiments of the present invention, as shown in fig. 3, the positive and negative electrode sheet die-cutting mechanism 300 includes a positive electrode die-cutting assembly 310 and a negative electrode die-cutting assembly 320, and the electrode sheet conveying mechanism 400 includes a positive electrode conveying assembly and a negative electrode conveying assembly, where the positive electrode conveying assembly is conveyed by an upper belt and the negative electrode conveying assembly is conveyed by a lower belt.

The positive pole transportation assembly corresponds to the discharge hole of the positive pole die cutting assembly 310 and is used for transporting the positive pole piece. The negative pole transportation subassembly corresponds the discharge gate setting of negative pole cross cutting subassembly 320 for transport negative pole piece. The positive pole piece manufactured by the positive pole die-cutting assembly 310 is conveyed to the upper surface of the belt of the positive pole conveying assembly, and the negative pole piece manufactured by the negative pole die-cutting assembly 320 is conveyed to the lower surface of the belt of the negative pole conveying assembly. Specifically, the inside of anodal transportation subassembly and negative pole transportation subassembly is provided with convulsions adsorption component respectively, because the pole piece is thinner, in order to guarantee that the pole piece can firmly laminate the belt surface of transportation subassembly, takes convulsions adsorption component to carry out the convulsions and adsorbs the belt surface of transportation subassembly, makes the pole piece pass through the pressure difference and fixes the belt surface at the transportation subassembly. The pole piece is adsorbed on the surface of the upper layer belt or the surface of the lower layer belt of the conveying assembly. The adsorption structure of the belt conveying pole piece of the positive and negative electrode conveying assembly is a technical scheme well known to those skilled in the art, and is not described in the embodiment.

In a further embodiment, as shown in fig. 3, the positive die-cutting assembly 310 includes a pole piece unwinding mechanism 331, a plurality of guide roller sets 332, a pole piece rounding mechanism 333, a roller feeding mechanism 334, a pole piece cutting mechanism 335, and a CCD dimension detecting mechanism 336. The pole piece band of pole piece unwinding mechanism 331 is carried pole piece fillet cutting mechanism 333 through guide roll set 332, and rethread roller send mechanism 334 carries pole piece cutting mechanism 335, gets into anodal transportation subassembly through CCD size detection mechanism 336 at last. The structure of the negative die-cutting assembly 320 is the same as that of the positive die-cutting assembly 310, and the pole piece of the negative transport assembly finally enters the negative transport assembly.

Specifically, the pole piece material roll is fixed on the pole piece unwinding mechanism 331, the pole piece material strip enters the pole piece fillet cutting mechanism 333 for fillet cutting processing under the guiding action of the pole piece unwinding mechanism 331 and the plurality of guide roller sets 332, then enters the pole piece cutting mechanism 335 for pole piece cutting through the roller feeding mechanism 334 for pole piece cutting, and is cut into pole pieces with specified width, and finally quality inspection is performed on the cut pole pieces through the CCD size detection mechanism 336. The manufactured pole pieces enter the corresponding conveying assembly after passing through the CCD size detection mechanism 336, the positive pole piece enters the upper surface of a belt of the positive conveying assembly, the negative pole piece enters the lower surface of a belt of the negative conveying assembly, the pole pieces are conveyed on the conveying assembly, and the manipulator continuously conveys the pole pieces on the conveying assembly to the CCD alignment mechanism 500 for alignment and then conveys the pole pieces to the lamination station for lamination.

In a further embodiment, as shown in fig. 3, the positive transport assembly includes a scrap piece separating conveyor belt 412 and at least one length of horizontal conveyor belt 411, the scrap piece separating conveyor belt 412 being in communication with the horizontal conveyor belt 411. When the positive electrode plate is conveyed by the waste plate separating conveyor 412, the waste plate separating conveyor 412 discharges the failed positive electrode plate. The positive electrode plate is transported along the upper surface of the horizontal transport belt 411, and the manipulator transports the positive electrode plate from the upper surface to the CCD alignment mechanism 500. In this embodiment, the positive electrode transport assembly includes three sets of horizontal transport belts 411, and the first horizontal transport belt 411 is disposed below the CCD dimension detecting mechanism 336 for transporting the quality-tested pole pieces. One side of the first horizontal conveying belt 411 is connected with the waste sheet separating and conveying belt 412, the pole pieces enter the lower surface of the waste sheet separating and conveying belt 412 from the first horizontal conveying belt 411, and the pole pieces which are not qualified in the quality inspection process of the CCD size detection mechanism 336 are removed from the waste sheet separating and conveying belt 412. One side of the waste sheet separating conveyer belt 412 is connected with a second section of horizontal conveyer belt 411, after the pole pieces are conveyed to the second section of horizontal conveyer belt 411 from the waste sheet separating conveyer belt 412, the manipulator continuously conveys the pole pieces on the surface of the horizontal conveyer belt 411 to the CCD aligning mechanism 500, the third section of horizontal conveyer belt 411 is connected with one side of the second section of horizontal conveyer belt 411, and the third section of horizontal conveyer belt 411 is adjusted according to the actual length of the production line. The number of the horizontal conveyer belts 411 on one side of the scrap separating conveyer belt 412 is adjusted according to the length of the production line. One, two or three horizontal conveyer belt 411 combinations may be used, and the number combinations of the horizontal conveyer belts 411 in the present invention are not described in detail, and it should be understood that the number combinations of the horizontal conveyer belts 411 can be flexibly changed without departing from the basic concept of the present invention, and all should be considered to be within the protection scope defined by the present invention.

In a further embodiment, as shown in fig. 3, the negative electrode transport assembly comprises an out-feed transport belt 421 and an adsorption transport belt 422, the out-feed transport belt 421 is in communication with the negative electrode die-cutting assembly 320, and the adsorption transport belt 422 is in communication with the out-feed transport belt 421. The negative pole piece gets into the lower surface of absorption conveyer belt 422 and transports along the lower surface of absorption conveyer belt 422 through ejection of compact conveyer belt 421, and the manipulator transports the negative pole piece from the lower surface to CCD counterpoint mechanism 500 on. Or the CCD alignment mechanism 500 extends to the lower surface of the adsorption conveyor belt 422, when the negative electrode plate is transported to the corresponding position of the CCD alignment mechanism 500, the adsorption conveyor belt 422 makes the negative electrode plate fall into the CCD alignment mechanism 500, and then the negative electrode plate is transported to the electrode plate alignment station 510 by the transfer mechanism provided in the CCD alignment mechanism 500, and the transfer mechanism can be realized by a conveyor belt structure.

In other embodiments, the negative electrode transportation assembly can adopt the same belt upper surface transportation mode as the positive electrode transportation assembly, and the negative electrode transportation assembly and the positive electrode transportation assembly are separated by a specified distance so that the manipulator can reach the belt upper surface of the negative electrode transportation assembly to carry the negative electrode pole piece.

Specifically, the discharging conveyer belt 421 is disposed below the CCD dimension detecting mechanism 336 for conveying the pole pieces after quality inspection. One side of the discharging conveyer belt 421 is connected with the adsorption conveyer belt 422, the pole pieces move on the adsorption conveyer belt 422, and when the pole pieces pass through the waste piece collecting area, the pole pieces with unqualified quality inspection are separated at the position. After the failed pole pieces are separated, the manipulator continuously carries the pole pieces from the adsorption conveyer belt 422 to the CCD aligning mechanism 500. The number combination of the adsorption conveyor 422 is the same as the number combination of the horizontal conveyor 411 in principle, and will not be described repeatedly. It should be noted that the waste sheet separating conveyer belt 412, the horizontal conveyer belt 411, the discharging conveyer belt 421 and the adsorbing conveyer belt 422 all adopt belt conveying structures with adsorbing structures, so as to prevent the pole pieces from falling off or moving on the surface of the belt.

The die-cutting mechanism 300 for the two sets of positive and negative pole pieces is provided with four sets of pole piece die-cutting assemblies in total, so that the lamination efficiency of the whole machine is greatly improved. And positive and negative pole piece cross cutting subassembly sets up at same end, and positive pole piece is at the upper surface transmission of positive pole transport assembly, and negative pole piece is at the lower surface transmission of negative pole transport assembly. The two sets of conveying assemblies are vertically distributed, and the pole pieces cut by the four sets of die cutting assemblies are all transferred to the middle of the lamination, so that the manipulator is convenient to carry. The size of the equipment is greatly reduced by adopting a mode of transmitting the pole pieces by the upper and lower belts, and the space is effectively utilized.

Specifically, after the positive electrode pieces of the positive electrode die-cutting assembly 310 are molded, the molded positive electrode pieces are conveyed to a positive electrode material taking area (i.e., a positive electrode conveying assembly), the three positive electrode pieces are conveyed to the platform of the CCD aligning mechanism 500 by the manipulator, and after the platform of the CCD aligning mechanism 500 is aligned, the three positive electrode pieces aligned are conveyed to the lamination area 212 of the cell tray 200 by the manipulator. After lamination is complete, the cell trays 200 are moved down one tray width together (i.e., to the next lamination station).

After the negative pole pieces of the negative pole die-cutting assembly 320 are molded, the molded negative pole pieces are conveyed to a negative pole taking area (namely, a negative pole conveying assembly), the three negative pole pieces are conveyed to the platform of the CCD aligning mechanism 500 by the manipulator, and after the platform of the CCD aligning mechanism 500 is aligned, the three aligned negative pole pieces are conveyed to the lamination area 212 of the cell tray 200 by the manipulator. After lamination is complete, the cell tray 200 is moved down one tray width together (i.e., to the next lamination station).

After the battery cell tray 200 is stacked with each pole piece, the positive and negative pole piece pressing knives can tightly press the corresponding pole pieces and the diaphragm, so that the pole pieces are prevented from being deviated in the stacking process, and the yield is improved. After the battery cell trays 200 are stacked with the specified number of pole piece layers, the diaphragm between the battery cell trays 200 is cut off by the cutter. The separated cell tray 200 is subjected to a hot-pressing post-treatment together with the pole pieces and the separator stacked thereon. And after the hot pressing is finished, the diaphragm between the monomer laminated battery cores is cut off to form the monomer laminated battery core.

And in the subsequent step, the mechanical arm can stack or post-treat the single battery cell to form a complete battery cell. After the battery cells are processed, the battery cell tray 200 from which the individual battery cells are taken is returned to the front side for lamination again.

It should be noted that the positive and negative electrode plates mentioned in the present invention can be replaced with each other, that is, the mechanism related to the positive electrode plate can be used for taking charge of the manufacturing and carrying of the negative electrode plate, and the mechanism related to the negative electrode plate can be used for taking charge of the manufacturing and carrying of the positive electrode plate.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a production line is circulated to circulating multistation lamination electricity core which characterized in that includes:

the device comprises a circulating type lamination conveying mechanism (100), wherein a plurality of lamination stations are arranged on the surface of the circulating type lamination conveying mechanism (100), and a diaphragm unwinding deviation rectifying mechanism (120) and a hot roller pressing laminating mechanism (130) are correspondingly arranged above each lamination station;

the two sets of positive and negative pole piece die-cutting mechanisms (300) are symmetrically distributed along the same side of the circulating type lamination conveying mechanism (100), a pole piece conveying mechanism (400) is arranged at a discharge port of the positive and negative pole piece die-cutting mechanism (300), the upper surface of the pole piece conveying mechanism (400) is used for conveying the same type of pole piece, and the lower surface of the pole piece conveying mechanism is used for conveying the other type of pole piece;

and the CCD alignment mechanism (500), the CCD alignment mechanism (500) set up in circulating lamination conveying mechanism (100) with between pole piece conveying mechanism (400), one side of CCD alignment mechanism (500) is provided with the manipulator, the manipulator is used for following pole piece conveying mechanism (400) carries the pole piece to arrive on CCD alignment mechanism (500) arrive again lamination station department.

2. A cyclical multi-station lamination cell circulation production line according to claim 1, comprising a plurality of cell trays (200), wherein the cell trays (200) are closely arranged and transported on the belt surface of the cyclical lamination transport mechanism (100), and the cell trays (200) sequentially pass through the lamination stations.

3. A circulating multi-station laminated battery cell circulation production line according to claim 1, wherein the positive and negative pole piece die-cutting mechanism (300) comprises a positive pole die-cutting assembly (310) and a negative pole die-cutting assembly (320), and the pole piece transportation mechanism (400) comprises a positive pole transportation assembly and a negative pole transportation assembly;

the positive electrode conveying assembly is arranged corresponding to a discharge hole of the positive electrode die cutting assembly (310) and is used for conveying positive electrode pieces;

the negative pole transportation assembly corresponds to the discharge hole of the negative pole die cutting assembly (320) and is used for transporting a negative pole piece.

4. A circulating multi-station laminated battery cell circulation production line according to claim 3, wherein the positive die cutting assembly (310) comprises a pole piece unreeling mechanism (331), a plurality of guide roller sets (332), a pole piece round corner cutting mechanism (333), a roller feeding mechanism (334), a pole piece cutting mechanism (335) and a CCD dimension detection mechanism (336);

the pole piece belt of the pole piece unreeling mechanism (331) is conveyed to the pole piece fillet cutting mechanism (333) through the guide roller group (332), then conveyed to the pole piece cutting mechanism (335) through the roller conveying mechanism (334), and finally enters the positive electrode conveying assembly through the CCD size detection mechanism (336);

the structure of the negative electrode die-cutting assembly (320) is the same as that of the positive electrode die-cutting assembly (310), and the pole piece of the negative electrode transportation assembly finally enters the negative electrode transportation assembly.

5. A circulating multi-station lamination cell circulation production line according to claim 4, wherein the positive electrode conveying assembly comprises a scrap separation conveyer belt (412) and at least one section of horizontal conveyer belt (411), and the scrap separation conveyer belt (412) is communicated with the horizontal conveyer belt (411);

when the positive pole piece is conveyed by the waste piece separation conveying belt (412), the waste piece separation conveying belt (412) unloads the failed positive pole piece;

and the positive pole piece is transported along the upper surface of the horizontal transport belt (411), and the manipulator transports the positive pole piece from the upper surface to the CCD aligning mechanism (500).

6. The circulating multi-station lamination cell circulation production line of claim 4, wherein the negative electrode conveying assembly comprises a discharging conveying belt (421) and an adsorbing conveying belt (422), the discharging conveying belt (421) is communicated with the negative electrode die cutting assembly (320), and the adsorbing conveying belt (422) is communicated with the discharging conveying belt (421);

the negative pole piece enters the lower surface of the adsorption conveying belt (422) through the discharging conveying belt (421) and is conveyed along the lower surface of the adsorption conveying belt (422), and the manipulator conveys the negative pole piece from the lower surface to the CCD aligning mechanism (500) or the CCD aligning mechanism (500) extends to the lower part of the lower surface of the adsorption conveying belt (422).

7. A cyclical multi-station laminated cell flow production line according to claim 2, wherein the cell tray (200) comprises a tray base (210), a surface of the tray base (210) being provided with at least one lamination area (212);

the two sides of each lamination area (212) are respectively provided with two groups of pole piece pressing devices (220), and the pole piece pressing devices (220) are used for pressing pole pieces on the lamination areas (212);

the pole piece pressing device (220) comprises a pressing knife piece (221) and a driving mechanism, wherein the pressing knife piece (221) comprises a positive pressing knife (221-1) and a negative pressing knife (221-2), and the driving mechanism is used for driving the positive pressing knife (221-1) and the negative pressing knife (221-2) to alternately press the pole pieces on the lamination area (212).

8. A circulating multi-station lamination cell circulation production line according to claim 7, wherein the tray base (210) is provided with mounting holes (211) corresponding to two sides of the lamination area (212), and the knife pressing pieces (221) are mounted on two sides of the lamination area (212) through the mounting holes (211);

a movable rod (222) extends from the joint of the positive pressure knife (221-1) and the negative pressure knife (221-2), and the movable rod (222) moves up and down in the mounting hole (211);

a limiting seat (223) is arranged at the bottom of the movable rod (222), an elastic piece (224) is sleeved on the rod body of the movable rod (222), the elastic piece (224) is located between the limiting seat (223) and the tray base (210), and the elastic piece (224) is used for enabling the knife pressing piece (221) to be automatically pressed;

the driving mechanism is in transmission connection with the bottom of the movable rod (222), and the driving mechanism is used for driving the cutter pressing piece (221) to lift up or rotate for a certain angle.

9. A circulating multi-station lamination battery cell circulation production line according to any one of claims 2 to 8, wherein a primary membrane unwinding deviation correcting mechanism (110) is arranged on one side of a starting position of the circulating lamination conveying mechanism (100), membranes of the primary membrane unwinding deviation correcting mechanism (110) are laid on the surface of the battery cell tray (200), and the circulating lamination conveying mechanism (100) drives the membranes of the primary membrane unwinding deviation correcting mechanism (110) to sequentially pass through the lamination stations;

the hot rolling laminating positioning mechanism is used for heating glue between the diaphragm and the pole piece so as to fix the positions of the pole piece and the diaphragm.

10. A circulating multi-station laminated battery cell circulation production line according to any one of claims 2 to 8, wherein the CCD alignment mechanism (500) is provided with at least one set of pole piece alignment stations (510), and the manipulator simultaneously carries the pole pieces on each pole piece alignment station (510) to the lamination station.

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