CN217848033U - Circulating type multi-station battery core lamination production line - Google Patents

Abstract

The utility model discloses a circulating multistation electric core lamination production line relates to electric core lamination production facility technical field, including circulating lamination transport mechanism, electric core tray, positive negative pole piece die-cutting mechanism, CCD counterpoint mechanism and electric core compensation lamination mechanism. According to the utility model discloses a circular multistation electric core lamination production line, the electric core tray on circular lamination transport mechanism circulates on the area face of circular lamination transport mechanism and piles up the lamination process that appointed quantity pole piece accomplished electric core after the appointed number of piles in supplementing among the electric core compensation lamination mechanism, can effectively shorten the overall arrangement length of production line, increases the electric core lamination number of piles through the form that electric core tray circulation flows, overcomes the problem that the place space brought, promotes production efficiency. And the battery cell compensation lamination mechanism can compensate the laminations on the basis of stacking of the circulating lamination conveying mechanism, so that the battery cell specification with any number of layers is produced, the number of lamination stations does not need to be adjusted, and the production efficiency is improved.

Description

Circulating multistation electricity core lamination production line

Technical Field

The utility model relates to an electricity core lamination production facility technical field, in particular to circulating multistation electricity core lamination 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 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 using new energy resources have flowers in a batch, the demand of matched power battery cell groups is exponentially multiplied along with the rising of the automobile output, and the efficiency of the conventional cell production equipment is difficult to meet the requirements of the existing market. The construction and research and development of the cell production line are greatly invested by large-scale and small-scale enterprises in the industry, and the breakthrough in productivity and efficiency is sought.

Most of the existing production lines of the battery cell lamination equipment are designed for workshops of large-scale enterprises, the production lines can be laid only by placing spaces with enough areas in the workshops, the small and micro enterprises under the large scale are unfriendly, the areas of the production workshops are not enough for placing complete production lines, the layout of the workshop equipment is adjusted, time and labor are wasted, and the production efficiency is influenced. And adopt to come and go the folding forming's form and carry out lamination electricity core production, CCD counterpoint platform sets up in the both sides direction of lamination equipment, and is daily inconvenient to the remodeling, debugging, the maintenance of lamination equipment. And the number of lamination stations is limited in the lamination process of the battery core, the number of laminations except the multiple of the lamination stations cannot be stacked, the time consumption is caused by adjusting the number of the lamination stations, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve the problems that the area of a production workshop is not enough to place a complete production line, the adjustment of the layout of workshop equipment is time-consuming and labor-consuming, and the production efficiency is influenced in the prior art; the mode of back and forth folding forming is adopted for laminated battery cell production, the model changing, debugging and maintenance of the laminated equipment are inconvenient in daily work, and the technical problems that the number of laminated stations is limited in the battery cell laminating process, the number of the laminated sheets beyond the multiple of the laminated stations cannot be stacked, the time is consumed for adjusting the number of the laminated stations, and the production efficiency is low are solved. Therefore, the utility model provides a circulating multistation electricity core lamination production line can realize circulating lamination operation, promotes space utilization, and the daily remodelling, the debugging and the maintenance of the lamination equipment of being convenient for effectively promote equipment space utilization efficiency, and lamination efficiency is higher, and lamination quantity is appointed wantonly.

According to the utility model discloses a circulating multistation electricity core lamination production line of some embodiments, include:

the surface of the circulating type lamination conveying mechanism is provided with a plurality of lamination stations, and a diaphragm unwinding deviation correcting mechanism is correspondingly arranged above each lamination station;

the battery cell trays are closely arranged and transported on the belt surface of the circulating type lamination transportation mechanism, the battery cell trays sequentially pass through the lamination stations, and the battery cell trays sink at the tail end of the belt surface of the circulating type lamination transportation mechanism and flow back to the belt surface starting position of the circulating type lamination transportation mechanism;

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;

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 conveying pole pieces from the pole piece conveying mechanism to the CCD alignment mechanism and then to the lamination station;

and one end of the battery cell compensation lamination mechanism is connected with the tail end of the circulating lamination conveying mechanism, a plurality of lamination stations are arranged on the battery cell compensation lamination mechanism, one side of the battery cell compensation lamination mechanism is provided with a group of positive and negative pole piece die cutting mechanisms, and the battery cell compensation lamination mechanism is used for supplementing lamination to the battery cell lamination on the battery cell tray.

According to some embodiments of the present invention, the battery cell compensation lamination mechanism comprises a battery cell tray return mechanism disposed between the circulating lamination transport mechanism and the battery cell compensation lamination mechanism; the battery cell tray enters the battery cell tray backflow mechanism from the tail end of the circulating lamination conveying mechanism, and the battery cell tray backflow mechanism conveys the battery cell tray to flow back to the initial position of the circulating lamination conveying mechanism or conveys the battery cell tray to the belt surface of the battery cell compensation lamination mechanism.

According to some embodiments of the present invention, the positive and negative electrode sheet die-cutting mechanism comprises a positive electrode die-cutting assembly and a negative electrode die-cutting assembly, and the electrode sheet conveying mechanism comprises a positive electrode conveying assembly and a negative electrode conveying 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 pieces; 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 present 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 dimension detecting 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 conveying assembly finally enters the negative electrode conveying assembly.

According to some embodiments of the present invention, the positive transport assembly comprises a scrap separation conveyor belt and at least one section of horizontal transport belt, the scrap separation 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 present invention, the negative electrode transportation assembly comprises a discharge transportation belt and an adsorption transportation belt, the discharge transportation belt is communicated with the negative electrode die cutting assembly, and the adsorption transportation belt is communicated with the discharge transportation 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 position below the lower surface of the adsorption conveying belt.

According to some embodiments of the invention, the cell tray comprises a tray base, the surface of the tray base being provided with at least one lamination area; the two sides of each lamination area are respectively provided with two groups of pole piece compressing devices which are used for compressing the 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 present invention, the tray base is provided with mounting holes corresponding to both sides of the lamination area, and the knife pressing members are mounted on both sides of the lamination area through the mounting holes; the joint of the positive pole pressing knife and the negative pole pressing knife is provided with a movable rod in an extending manner, and the movable rod 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 the utility model discloses a some embodiments, circulating lamination transport mechanism's home position one side is provided with the one-level diaphragm and unreels the mechanism of rectifying, the one-level diaphragm unreels the diaphragm of the mechanism of rectifying and lays in the surface of electricity core tray, circulating lamination transport mechanism drives the one-level diaphragm unreels the diaphragm of the mechanism of rectifying and passes through in proper order the lamination station.

According to the utility model discloses a some embodiments, CCD counterpoint mechanism is provided with at least a set of pole piece counterpoint station, the manipulator carries respectively simultaneously pole piece on the pole piece counterpoint station arrives on the lamination station.

According to the utility model discloses a circulating multistation electric core lamination production line of some embodiments has following beneficial effect at least:

1. the battery cell tray on the circulating type lamination conveying mechanism enters the specified layer number after being circularly stacked on the belt surface of the circulating type lamination conveying mechanism, the lamination process of a battery cell is completed by supplementing the laminations for stacking the specified number of pole pieces in the battery cell compensation lamination mechanism, the layout length of a production line can be effectively shortened, the number of the lamination layers of the battery cell is increased through the circular flowing form of the battery cell tray, the problem caused by field space is solved, and the production efficiency is improved.

2. And the cell compensation lamination mechanism can compensate the laminations on the basis of stacking of the circulating lamination conveying mechanism, so that the cell specification with any number of layers can be produced, the number of lamination stations does not need to be adjusted, and the production efficiency is improved.

3. 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 circulating multi-station cell lamination production line according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is an enlarged schematic view of portion B of FIG. 1;

fig. 4 is a top view of a circulating multi-station cell lamination production line according to an embodiment of the present invention;

fig. 5 is an internal schematic view of the positive and negative electrode plate die-cutting mechanism according to the embodiment of the present invention;

fig. 6 is a schematic diagram of a cell tray according to an embodiment of the present invention;

fig. 7 is an enlarged schematic view of a portion a of fig. 6.

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

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 roll set 332, a pole piece round corner cutting mechanism 333, a roll feeding mechanism 334, a pole piece cutting mechanism 335, a CCD size detection mechanism 336,

A pole piece conveying mechanism 400, a horizontal conveying belt 411, a waste piece separating conveying belt 412, a discharging conveying belt 421, an adsorption conveying belt 422, a CCD contraposition mechanism 500, a pole piece contraposition station 510,

Cell compensation lamination mechanism 600.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not 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, for example, the upper, lower, front, rear, left, right, top, bottom, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of the 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 therefore, should not be considered as limiting the present invention.

In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, 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 there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

A cycle type multi-station cell lamination production line according to an embodiment of the present invention is described below with reference to fig. 1 to 7.

As shown in fig. 1-7, the cyclic multi-station cell lamination production line includes a cyclic lamination transportation mechanism 100 responsible for forming cell laminations, a cell tray 200 responsible for carrying cell laminations and diaphragms, two sets of positive and negative pole piece die cutting mechanisms 300 responsible for manufacturing positive and negative pole pieces, a CCD alignment mechanism 500 responsible for aligning the pole pieces, and a cell compensation lamination mechanism 600 responsible for compensating the lamination of the cell laminations on the cell tray 200. The pole pieces are moved among the circulating lamination conveying mechanism 100, the positive and negative pole piece die-cutting mechanism 300 and the CCD alignment mechanism 500 by a manipulator (not shown in the drawing), so as to form a complete cell production line. And a positive and negative pole piece die cutting mechanism 300 and a CCD alignment mechanism 500 are also provided at one side of the cell compensation lamination mechanism 600, and the positive and negative pole pieces are carried to the cell tray 200 of the cell compensation lamination mechanism 600 by a manipulator.

The production line comprises a plurality of battery cell trays 200, the battery cell trays 200 are closely arranged and transported on the belt surface of the circulating type lamination transport mechanism 100, and the battery cell trays 200 sequentially pass through each lamination station. Specifically, the cell trays 200 are closely arranged on the conveyor belt of the endless lamination transport 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. When the battery cell tray 200 reaches the end of the belt surface of the circulating lamination transport mechanism 100, the diaphragm between the battery cells on the battery cell tray 200 is cut, and then the battery cell tray 200 and the battery cells on the tray flow back to the belt surface start position of the circulating lamination transport mechanism 100 to be circularly stacked. The cell laminations on the cell tray 200 form cell laminations of a specified specification after a specified cycle number, and then enter the cell compensation lamination mechanism 600 to compensate and stack a specified number of pole pieces to form a complete single cell. The diaphragm between the individual cells is cut off at the tape end of the cell compensation lamination mechanism 600, and the cell tray 200 and the individual cells are sent to the subsequent heat treatment, so that the processing of a plurality of cells is completed, the processed cells are separated from the cell tray 200, and the cell tray 200 collects and returns to the initial position of the circulating lamination transport mechanism 100.

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 correcting mechanism 120 is correspondingly arranged above each lamination station. When the circulating type lamination conveying mechanism 100 drives the diaphragm to the lamination station, the manipulator conveys 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, and the circulating type lamination conveying mechanism 100 drives the pole piece and the diaphragm to the next lamination station to perform lamination operation, and when the battery cell tray 200 is used. And (3) forming a certain number of layers of battery cell laminations after the steps are circulated for the specified times, wherein the number of lamination stations of the circulating lamination conveying mechanism 100 is determined according to the layout length of the actual circulating lamination conveying mechanism 100, and when a production line is laid out in a narrow space, the number of lamination stations is N, and N is set according to the actual space length. The number of the lamination layers circularly stacked on the circulating lamination transport mechanism 100 is multiple of N, and in order to stack the lamination layer number beyond the multiple of N, the cell tray 200 enters the cell compensation lamination mechanism 600 for lamination. Therefore, the number of the produced battery cell laminations can be any specified number of layers, the production specification of the single battery cells of the production line is expanded, the limitation caused by the field space is overcome, and the production efficiency of the battery cells is improved in a limited field.

Specifically, one end of the cell compensation lamination mechanism 600 is connected to the end of the circulating lamination transport mechanism 100, a plurality of lamination stations are disposed on the cell compensation lamination mechanism 600, a set of positive and negative pole piece die-cutting mechanisms 300 is disposed on one side of the cell compensation lamination mechanism 600, and the cell compensation lamination mechanism 600 is used for supplementing lamination to the cell laminations on the cell tray 200. The structure of the cell compensation lamination mechanism 600 is the same as that of the circulating lamination transport mechanism 100, and the two sides are provided with the corresponding positive and negative pole piece die-cutting mechanism 300 and the CCD alignment mechanism 500.

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 promote the lamination efficiency of production line the utility model discloses a positive negative pole piece die-cutting mechanism 300 of two sets of symmetric distributions carries out the preparation of pole piece, and the pole piece that is located the positive negative pole piece die-cutting mechanism 300 preparation of the first half section of circulating lamination conveying mechanism 100 is supplied with the lamination station of the first half section and is used, and the pole piece that the positive negative pole piece die-cutting mechanism 300 preparation of the second half section of circulating lamination conveying mechanism 100 is supplied with the lamination station of the second half section and is used to effectively promote the lamination efficiency of circulating lamination conveying mechanism 100.

Positive negative pole piece die-cutting mechanism 300 can the feed positive pole and negative pole simultaneously, for the equipment that current single type pole piece was supplied with, the utility model provides a positive negative pole piece die-cutting mechanism 300 can promote the production efficiency of production line by a wide margin to can reduce the occupation space of production line equipment, promote space utilization. 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 feeding equipment, 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 set of CCD alignment mechanisms 500 is disposed correspondingly to each lamination station. The manipulator is arranged on one side of the C CD contraposition mechanism 500 and used for carrying the pole piece from the pole piece transportation mechanism 400 to the CCD contraposition 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 enough space is reserved at the other side of the circulating lamination conveying mechanism 100, so that workers can perform debugging, maintenance, model changing and the like on the equipment in daily life.

The utility model discloses a circulating multistation electric core lamination production line adopts the assembly line lamination mode to fold, and the lamination circulates on circulating lamination transport mechanism 100 and forms the electric core lamination of appointed number of times many times, deuterogamies electric core compensation lamination mechanism 600 and supplements the number of piles of electric core lamination, piles up formation monomer electricity core promptly, piles up the production methods for current formula of turning back, the utility model discloses a circulating lamination structure production efficiency is higher, and area still less.

It should be understood that the manner in which the positive and negative electrode sheet die-cutting mechanism 300 is symmetrically disposed is not the only implementation manner, and in other embodiments, a single set of positive and negative electrode sheet die-cutting mechanism 300 may be further used to cover all the lamination stations on the circulating type lamination transportation mechanism 100 according to actual production requirements, specifically, the length of the production line of the circulating type lamination transportation mechanism 100 is selected, and when the length is too long, multiple sets of 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 utility model discloses adjust quantity and overall arrangement of negative and positive pole piece die-cutting mechanism 300 and give unnecessary details, should understand, not deviating from the utility model discloses under the prerequisite of basic design, the quantity and the nimble transform of overall arrangement of positive and negative pole piece die-cutting mechanism 300 all should be regarded as being in the utility model discloses within the scope of protection injectd.

In some embodiments of the present invention, as shown in fig. 6 and 7, a cell tray return mechanism (not shown in the drawings) is included and disposed between the circulating lamination transport mechanism 100 and the cell compensation lamination mechanism 600. The cell trays 200 enter the cell tray return mechanism from the end of the endless laminated sheet conveying mechanism 100, and the cell tray return mechanism conveys the cell trays 200 to return to the initial position of the endless laminated sheet conveying mechanism 100 or to the belt surface of the cell compensation laminated sheet mechanism 600.

Specifically, in order to ensure that the cell trays can be cyclically conveyed on the cyclic lamination transport mechanism 100 or the cell trays can be transited from the cyclic lamination transport mechanism 100 to the cell compensation lamination mechanism 600, a cell tray backflow mechanism is provided to assist the cell tray 200 to backflow or move. The cell tray backflow mechanism comprises a lifting mechanism (not shown in the drawing) and a top conveying mechanism (not shown in the drawing), the lifting mechanism is connected with the top conveying mechanism, and a conveying belt of the top conveying mechanism can rotate forwards or backwards. The forward rotation direction of the top transport mechanism is the direction in which the cell trays 200 move along the circulating lamination transport mechanism 100, and the reverse rotation direction is the direction in which the cell trays 200 move toward the starting position of the circulating lamination transport mechanism 100.

When the cell tray 200 enters the belt surface of the top conveying mechanism from the end of the endless laminated sheet conveying mechanism 100, the lifting mechanism is lifted or kept stationary according to the step of the next process of the cell tray 200.

When electric core tray 200 next process is for the circulation pile up, elevating system falls to the bottom to top transport mechanism, top transport mechanism reversal, convey electric core tray 200 toward circulating lamination transport mechanism 100 initial position direction, electric core tray 200 can convey the initial position below of circulating lamination transport mechanism 100 through the conveyer belt structure, the rethread also sets up an electric core tray return mechanism and carries out the circulation pile up electric core tray 200 jacking to the initial position of circulating lamination transport mechanism 100 area face in circulating lamination transport mechanism 100 initial position below.

When the next procedure of the battery cell tray 200 is to enter the battery cell compensation lamination mechanism 600 for compensation stacking, the lifting mechanism keeps the jacking state, and the top conveying mechanism rotates forwards to convey the battery cell tray 200 to the belt surface of the battery cell compensation lamination mechanism 600.

The specific structure of the lifting mechanism and the top conveying mechanism is well known to those skilled in the art, and will not be described in detail in this embodiment. The starting position of the cell tray 200 conveyed back to the circulating lamination transport mechanism 100 by the belt structure is not the only embodiment. The utility model discloses not lasting to the concrete structure that electric core tray 200 flows back circulating lamination transport mechanism 100 initial position, should understand, not deviating from the utility model discloses under the prerequisite of basic concept, electric core tray 200 flows back the nimble transform of concrete structure of circulating lamination transport mechanism 100 initial position, all should regard as and be in the utility model discloses within the scope of protection of injecing.

In some embodiments of the present invention, as shown in fig. 6 and 7, the cell tray 200 includes a tray base 210, and at least one lamination area 212 is disposed on a surface of the tray base 210; two groups of pole piece compressing devices 220 are respectively arranged on two sides of each lamination area 212, and the pole piece compressing devices 220 are used for compressing 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 compressing device 220, at least one lamination area 212 is disposed on the surface of the tray base 210, in this embodiment, three lamination areas 212 are disposed on the surface of one cell tray 200, and the three groups of laminations can be simultaneously carried in batch movement, and a lamination station can laminate multiple 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 electric core tray 200 can be adjusted according to the lamination production line of different specifications, and the number of lamination areas 212 can be set to two, four or five, and so on, and it should be understood that, without departing from the basic concept of the present invention, the number of lamination areas 212 is flexibly changed, and all should be regarded as being within the protection scope defined by the present invention.

Due to the fact that the thickness of the thin film is small, the steps of subsequent cutting, heat treatment and the like are not facilitated on the conveying belt in the lamination process, and 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 some other embodiments, pole piece closing device 220 can also set up a set of pole piece closing device 2 at the middle part position of the regional 212 both sides of lamination, compresses tightly the pole piece and the diaphragm of piling up through each a set of pole piece closing device 220 in both sides, should understand, under the prerequisite that does not deviate from the utility model discloses basic concept, pole piece closing device 220's quantity sets up nimble transform, all should regard as within the scope of protection that the utility model prescribes a limit to.

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 lamination area 212 is used for laminating and stacking the negative pole piece, the driving mechanism of the four-group pole piece pressing device 220 controls the pressing knife piece 2 to be switched to the negative pressing knife 221-2 and presses the negative pole piece and the diaphragm on the lamination area 212. The pressing knife piece 22 compresses the pole pieces and the diaphragm on the lamination area 212 through alternately switching the positive pressing knife 221-1 and the negative pressing knife 221-2, and can effectively avoid cross contamination of materials between the positive pole piece and the negative pole piece. 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 utility model discloses a positive pole tucker 221-1 and negative pole tucker 221-2 can realize the operation that compresses tightly of different kinds of pole pieces, have solved pole piece cross contamination's problem.

In a further embodiment, as shown in fig. 6 and 7, 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 up 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 piece in the lamination area 212. The driving mechanism pushes the movable rod 222 to rise, 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 pole pressing blade 2-1 or the negative pole 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 utility model discloses specific structure to actuating mechanism differs a repeated description, should understand, does not deviate from the utility model discloses under the prerequisite of basic concept, actuating mechanism's specific structure is nimble to be changeed, all should regard as and is in the utility model discloses within the scope of protection injectd.

In some embodiments of the present invention, as shown in fig. 1-3, one side of the starting position of the circulating lamination conveying mechanism 100 is provided with the one-level diaphragm unwinding deviation correcting mechanism 110, the diaphragm of the one-level diaphragm unwinding deviation correcting mechanism 110 is laid on the surface of the electrical core tray 200, and the diaphragm of the circulating lamination conveying mechanism 100 driving the one-level diaphragm unwinding deviation correcting mechanism 110 sequentially passes through the lamination station.

In some embodiments of the present invention, as shown in fig. 4 and fig. 5, the CCD alignment mechanism 500 is provided with at least one set of pole piece alignment stations 510, and the manipulator carries the pole pieces on each pole piece alignment station 510 to the lamination station simultaneously. 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 a time, thereby improving the lamination production efficiency.

In some embodiments of the present invention, as shown in fig. 5, the positive and negative electrode die-cutting mechanism 300 includes a positive electrode die-cutting assembly 310 and a negative electrode die-cutting assembly 320, and the electrode transportation mechanism 400 includes a positive electrode transportation assembly and a negative electrode transportation assembly, i.e. the positive electrode transportation assembly corresponds to the transportation of the upper layer belt, and the negative electrode transportation assembly corresponds to the transportation of the lower layer belt.

The positive pole transport assembly corresponds to the discharge port 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 positive pole 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 convulsions absorption to 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. 5, 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 CC D size detection 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 electrode die-cutting component 320 is the same as that of the positive electrode die-cutting component 3, and the pole piece of the negative electrode transportation component finally enters the negative electrode transportation component.

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

In a further embodiment, as shown in fig. 5, the positive transport assembly includes a scrap piece separating conveyor belt 412 and at least one length of horizontal transport belt 411, the scrap piece separating conveyor belt 412 in communication with the horizontal transport 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 the 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. Can adopt one section, two sections or three-section horizontal transport area 411 combination, the utility model discloses the quantity combination to horizontal transport area 411 is not different and is repeated, should understand, does not deviate from the utility model discloses under the prerequisite of basic concept, the quantity combination of horizontal transport area 411 is changeed in a flexible way, all should regard as within the utility model discloses within the scope of protection of injecing.

In a further embodiment, as shown in fig. 5, 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 CCD counterpoint mechanism 500 extends to the below of adsorbing transport band 422 lower surface, when negative pole piece transported the CCD counterpoint mechanism 500 position that corresponds, adsorbs transport band 422 and makes the negative pole piece fall into CCD counterpoint mechanism 500, and the rethread CCD counterpoint mechanism 500 sets up moves the mechanism and transports negative pole piece to pole piece counterpoint station 510 on, moves and carries the mechanism and can adopt the conveyer belt structure to realize, should understand, not deviating from the utility model discloses under the prerequisite of basic concept, move the nimble transform of concrete structure that moves the mechanism, all should regard as and be in the utility model discloses within the scope of injecture.

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 discharge conveyor 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 4, 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 scrap separating conveyor belt 412, the horizontal conveyor belt 411, the discharging conveyor belt 421 and the adsorbing conveyor belt 422 all adopt a belt conveying structure with an adsorbing structure, so as to prevent the pole pieces from falling off or moving on the surface of the belt.

The utility model discloses a two sets of positive negative pole piece die-cutting mechanism 300 are provided with four sets of pole piece cross cutting subassemblies altogether, have improved the lamination efficiency of complete machine greatly. 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. Two sets of transportation subassemblies are upper and lower distribution to the pole piece that four sets of cross cutting subassemblies cut all is toward the middle circulation of lamination, the manipulator transport of being convenient for. The size of the equipment is greatly reduced by adopting the mode of transmitting the pole pieces by the upper and lower sets of belts, and the space is effectively utilized.

Specifically, after the positive electrode sheet of the positive electrode die-cutting assembly 310 is molded, the molded positive electrode sheet is conveyed to a positive electrode material taking area (i.e., a positive electrode conveying assembly), the three positive electrode sheets are conveyed to the platform of the CCD alignment mechanism 500 by the mechanical arm, and after the platform of the CC D alignment mechanism 500 is aligned, the three aligned positive electrode sheets are conveyed to the lamination area 212 of the cell tray 200 by the mechanical arm. 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 transmitted to a negative pole material 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 battery 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 number of layers of the designated pole pieces is stacked on the battery cell trays 200, the diaphragms between the battery cell trays 200 are 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 cell is processed, the cell tray 200 from which the individual cells have been taken is returned to the front side for re-lamination.

It should be noted that the utility model discloses positive negative pole piece that mentions can replace each other, and the mechanism that positive pole piece is relevant can be used for being responsible for the manufacturing transport of negative pole piece promptly, and the mechanism that negative pole piece is relevant can be used for being responsible for the manufacturing transport of positive pole piece.

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 present 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 present 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 circulating multistation electricity core lamination production line 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 correcting mechanism (120) is correspondingly arranged above each lamination station;

the battery cell trays (200) are closely arranged and transported on the belt surface of the circulating type lamination transportation mechanism (100), the battery cell trays (200) sequentially pass through the lamination stations, and the battery cell trays (200) sink at the tail end of the belt surface of the circulating type lamination transportation mechanism (100) and flow back to the starting position of the belt surface of the circulating type lamination transportation mechanism (100);

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;

the CCD alignment mechanism (500) is arranged between the circulating type lamination conveying mechanism (100) and the pole piece conveying mechanism (400), one side of the CCD alignment mechanism (500) is provided with a mechanical arm, and the mechanical arm is used for conveying pole pieces from the pole piece conveying mechanism (400) to the CCD alignment mechanism (500) and then to the lamination station;

and one end of the battery cell compensation lamination mechanism (600) is connected with the tail end of the circulating type lamination conveying mechanism (100), a plurality of lamination stations are arranged on the battery cell compensation lamination mechanism (600), one side of the battery cell compensation lamination mechanism (600) is provided with a group of positive and negative pole piece die cutting mechanisms (300), and the battery cell compensation lamination mechanism (600) is used for supplementing laminations to battery cell laminations on the battery cell tray (200).

2. A cyclical multi-station cell lamination production line according to claim 1, comprising a cell tray return mechanism disposed between the cyclical lamination transport mechanism (100) and the cell compensation lamination mechanism (600);

the battery cell tray (200) enters the battery cell tray backflow mechanism from the tail end of the circulating lamination conveying mechanism (100), and the battery cell tray backflow mechanism conveys the battery cell tray (200) to flow back to the initial position of the circulating lamination conveying mechanism (100) or conveys the battery cell tray to the belt surface of the battery cell compensation lamination mechanism (600).

3. A circulating multi-station cell lamination production line according to claim 2, wherein the positive and negative electrode pole piece die-cutting mechanism (300) comprises a positive electrode die-cutting assembly (310) and a negative electrode die-cutting assembly (320), and the pole piece transportation mechanism (400) comprises a positive electrode transportation assembly and a negative electrode 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 cell lamination 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 band of the pole piece unreeling mechanism (331) is conveyed to the pole piece fillet cutting mechanism (333) through the guide roll group (332), then conveyed to the pole piece cutting mechanism (335) through the roll conveying mechanism (334), and finally enters the anode 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 cyclic multi-station cell lamination production line according to claim 4, wherein the positive electrode transportation assembly comprises a scrap piece separating conveyor belt (412) and at least one section of horizontal conveyor belt (411), the scrap piece separating conveyor belt (412) being in communication with the horizontal conveyor 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 type multi-station battery cell lamination production line of claim 4, wherein the negative electrode conveying assembly comprises an 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 onto the CCD aligning mechanism (500) or the CCD aligning mechanism (500) extends to the position below the lower surface of the adsorption conveying belt (422).

7. A cyclical, multi-station cell lamination 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 compressing devices (220), and the pole piece compressing devices (220) are used for compressing 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 type multi-station cell lamination production line according to claim 7, wherein mounting holes (211) are formed in the tray base (210) 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 cutter 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 battery cell lamination production line according to any one of claims 2 to 8, wherein a first-stage membrane unwinding deviation correcting mechanism (110) is arranged on one side of a starting position of the circulating lamination conveying mechanism (100), a membrane of the first-stage membrane unwinding deviation correcting mechanism (110) is laid on the surface of the battery cell tray (200), and the circulating lamination conveying mechanism (100) drives the membrane of the first-stage membrane unwinding deviation correcting mechanism (110) to sequentially pass through the lamination stations.

10. A circulating multi-station cell lamination 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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