CN115275369A

CN115275369A - Lamination device and lamination method

Info

Publication number: CN115275369A
Application number: CN202210936155.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-01

Abstract

The invention provides a lamination device and a lamination method, which belong to the technical field of lithium battery production and comprise the following steps: a vertical plate; the lamination tables are movably arranged and are provided with a plurality of lamination tables, and each lamination table is provided with a pressing knife; the membrane unwinding mechanism is arranged on the vertical plate and is suitable for reciprocating along the transverse direction, and the plurality of lamination tables can move alternately so that one of the plurality of lamination tables can move below the membrane unwinding mechanism; the pole piece feeding mechanism is arranged corresponding to the lamination table; the smoothing mechanism is arranged on the vertical plate and can be movably arranged, is positioned above the lamination table and below the membrane unreeling mechanism and is suitable for driving the membrane to move along the transverse direction; a cutting mechanism adapted to cut the membrane downstream of the smoothing mechanism. According to the laminating device provided by the invention, the simultaneous blanking and laminating of the laminating device are realized, the blanking auxiliary time of the laminating can be greatly shortened, the stop time of the laminating process is also shortened, and the production efficiency of the battery cell is improved.

Description

Lamination device and lamination method

Technical Field

The invention relates to the technical field of lithium battery production, in particular to a lamination device and a lamination method.

Background

In the process of manufacturing a battery core by lithium battery lamination, a manipulator is generally used for moving left and right to alternately stack positive and negative plates on a lamination table, a layer of diaphragm is stacked between the adjacent positive and negative plates through a diaphragm unwinding mechanism, and the diaphragm moves left and right in a reciprocating manner to form a Z-shaped lamination. And after lamination is completed, cutting off the diaphragm, and clamping the battery cell by using a discharging mechanical arm to move out for discharging. Therefore, in the battery core blanking process, the lamination process needs to be stopped, and the next lamination can be performed after the battery cores are blanked, so that the production efficiency is low.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect of low production efficiency of lamination manufacturing battery cells in the prior art, so as to provide a lamination device and a lamination method.

In order to solve the above problems, the present invention provides a lamination device including: a vertical plate; the lamination platforms are movably arranged and are provided with a plurality of lamination platforms, and each lamination platform is provided with a pressing knife; the membrane unwinding mechanism is arranged on the vertical plate and is suitable for reciprocating along the transverse direction, and the plurality of lamination tables can move alternately so that one of the plurality of lamination tables can move to the position below the membrane unwinding mechanism; the pole piece feeding mechanism is arranged corresponding to the lamination table; the smoothing mechanism is arranged on the vertical plate and can be movably arranged, is positioned above the lamination table and below the membrane unreeling mechanism and is suitable for driving the membrane to move along the transverse direction; a cutting mechanism adapted to cut the membrane downstream of the smoothing mechanism.

Optionally, the smoothing mechanism comprises a pair of smoothing rollers arranged oppositely, and the pair of smoothing rollers allows the diaphragm to pass through.

Optionally, the flattening mechanism is telescopically arranged in a longitudinal direction.

Optionally, the diaphragm unwinding mechanism comprises a diaphragm buffering structure, and the length of a buffering diaphragm in the diaphragm buffering structure is adjustable.

Optionally, the lamination device further comprises a film clamping mechanism adapted to clamp the diaphragm at a position above or below and adjacent to the smoothing mechanism.

Optionally, the film clamping mechanism is capable of moving in a transverse direction synchronously with the smoothing mechanism.

Optionally, the film clamping mechanism is telescopically arranged in the longitudinal direction.

Optionally, the film clamping mechanism comprises a pair of clamping rollers which are oppositely arranged, and the pair of clamping rollers is suitable for clamping the diaphragm.

Optionally, the lamination device further comprises a blanking mechanism, and the blanking mechanism is arranged corresponding to the lamination table far away from the membrane unreeling mechanism in the plurality of lamination tables.

The invention also provides a lamination method, which is applied to the lamination device and comprises the following steps: one lamination table in the lamination tables moves to a lamination station for lamination, wherein the diaphragm unwinding mechanism reciprocates above the lamination station to lay a diaphragm on the lamination table of the lamination station, and a positive plate or a negative plate is stacked on the diaphragm through the pole piece feeding mechanism; after the last layer of pole piece is stacked on the stacking table positioned at the stacking station, the smoothing mechanism moves transversely between the stacking table and the membrane unreeling mechanism and drives the membrane to move so as to lay the membrane on the last layer of pole piece, and the stacking is finished; the lamination station positioned at the lamination station moves to a blanking station, the other lamination station in the plurality of lamination stations moves to the lamination station, and the diaphragm is cut off at the downstream of the smoothing mechanism by the cutting mechanism; the laminating table located at the blanking station carries out blanking, and a pressing knife located on the laminating table located at the laminating station presses a diaphragm between the flattening mechanism and the diaphragm unreeling mechanism on the laminating table so as to carry out lamination.

Optionally, after the blanking of the lamination table at the blanking station is completed, the lamination table moves to a waiting station, and when the lamination of the lamination table at the lamination station is completed and moves to the blanking station, the lamination table at the waiting station moves towards the lamination station.

Optionally, the blanking station is located below the lamination station, and the waiting station is located in front of the lamination station and is arranged at the same height.

Optionally, after the lamination table at the blanking station is blanked, the lamination table is moved a predetermined distance in a horizontal plane to be moved out of the blanking station, and then the lamination table is moved to the lamination station after one or more movements in vertical and horizontal directions.

Optionally, after the lamination is completed, the lamination table located at the lamination station moves downwards to the blanking station and drives the membrane to extend to the blanking station, and then the membrane is cut off by the cutting mechanism.

Optionally, after the membrane is cut by the cutting mechanism, the membrane buffer structure withdraws the membrane beyond the smoothing mechanism, so that the cut end of the membrane corresponds to the lamination table located at the lamination station.

Optionally, the cutting mechanism cuts the membrane at a location of the press knife on the lamination table near the blanking station.

Optionally, after the lamination is completed, the membrane clamping mechanism above the flattening mechanism clamps and fixes the membrane, the cutting mechanism cuts the membrane, and then the lamination table at the lamination station moves towards the blanking station.

Optionally, in the lamination process, each time a positive plate or a negative plate is stacked on the lamination table of the lamination station, the lamination table moves downwards by a preset distance, so that the pole piece feeding mechanism or the diaphragm unwinding mechanism feeds materials at the same height every time.

The invention has the following advantages:

1. according to the laminating device provided by the invention, the laminating table after lamination is moved to the blanking station for blanking, and the other laminating table is moved to the laminating station for lamination, so that blanking and lamination are simultaneously carried out by the laminating device, the blanking auxiliary time of the lamination can be greatly shortened, the stopping time of the lamination process is also shortened, and the production efficiency of a battery cell is improved.

2. According to the laminating device, after the diaphragm is cut off, the diaphragm exceeding the flattening mechanism is pumped back through the diaphragm buffer structure, so that the waste of the diaphragm is avoided, and the production quality is improved.

3. According to the laminating device provided by the invention, the membrane clamping mechanism is arranged and is matched with the laminating station to cut the membrane, the membrane does not need to be drawn back, and the auxiliary time is further reduced, so that the membrane can be conveniently laminated again for use.

4. According to the laminating device provided by the invention, the film clamping mechanism and the flattening mechanism synchronously reciprocate, the film clamping mechanism does not need to clamp the diaphragm in the reciprocating movement process, the diaphragm is only clamped when the lamination is finished, and the flattening mechanism and the film clamping mechanism are convenient to use.

5. According to the laminating device provided by the invention, when the flattening mechanism and/or the film clamping mechanism are/is required to clamp the diaphragm, the flattening mechanism and/or the film clamping mechanism longitudinally extend out, the flattening mechanism and/or the film clamping mechanism can retract longitudinally without using the flattening mechanism and/or the film clamping mechanism in the laminating process, the flattening mechanism and/or the film clamping mechanism is convenient to use, and the flattening mechanism and/or the film clamping mechanism are ensured not to interfere with the laminating process.

6. According to the laminating method provided by the invention, after the laminating table finishes blanking at the blanking station, the laminating table moves to the waiting station firstly, and when the laminating table at the laminating station finishes moving towards the blanking station, the laminating table at the waiting station moves towards the laminating station simultaneously, so that a new laminating table can be quickly supplemented at the laminating station, the production preparation time is shortened, and the production efficiency is further improved.

7. According to the laminating method provided by the invention, the blanking station is arranged below the laminating station, the waiting station is arranged in front of the laminating station and is arranged at the same height, and the movement of the laminating table is more convenient.

8. According to the lamination method provided by the invention, the diaphragm is cut off at the position close to the laminated battery core by using the cutting mechanism, so that redundant diaphragms do not exist on the laminated battery core, the production quality of the battery core is ensured, and the diaphragm can be pumped back to the greatest extent for reuse, so that waste is avoided.

9. According to the laminating method provided by the invention, through the matching of the film clamping mechanism and the cutting mechanism, the membrane is cut at the laminating station and then subjected to the blanking process, and the membrane does not need to be pumped back after being cut, so that the production efficiency is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view showing a first state in which a lamination device provided in embodiment 1 of the present invention is located in a lamination process of a lamination table of a lamination station;

fig. 2 is a schematic view showing a second state in which a lamination device provided in embodiment 1 of the present invention is located in a lamination process of a lamination table of a lamination station;

fig. 3 is a schematic view showing a third state in which the lamination apparatus provided in embodiment 1 of the present invention is located in a lamination process of a lamination table of a lamination station;

fig. 4 is a schematic view of a membrane clamping mechanism of the lamination device smoothing mechanism provided in embodiment 1 of the present invention;

fig. 5 is a schematic view illustrating a flattening mechanism of a lamination device provided in embodiment 1 of the present invention to move and lay a membrane;

FIG. 6 is a schematic view showing a lamination apparatus according to embodiment 1 of the present invention after two lamination stages are alternately moved;

FIG. 7 is a schematic view showing a membrane cutting mechanism of the lamination device cutting mechanism according to embodiment 1 of the present invention;

fig. 8 shows a schematic view of a first step of a lamination method provided in embodiment 3 of the present invention;

fig. 9 shows a schematic view of a second step of the lamination method provided in embodiment 3 of the present invention;

fig. 10 shows a schematic view of a third step of the lamination method provided in embodiment 3 of the present invention;

fig. 11 shows a schematic view of a fourth step of the lamination method provided in embodiment 3 of the present invention;

fig. 12 shows a schematic diagram of a fifth step of the lamination method provided in embodiment 3 of the present invention;

fig. 13 shows a schematic representation of a sixth step of the lamination method provided in embodiment 3 of the present invention;

fig. 14 shows a schematic view of a first step of the lamination method provided in embodiment 4 of the present invention;

fig. 15 shows a schematic view of a second step of the lamination method provided in embodiment 4 of the present invention;

fig. 16 shows a schematic view of a third step of the lamination method provided in embodiment 4 of the present invention;

fig. 17 shows a schematic diagram of a fourth step of the lamination method provided in embodiment 4 of the present invention;

fig. 18 shows a schematic view of a fifth step of the lamination method provided in embodiment 4 of the present invention;

fig. 19 shows a schematic diagram of a sixth step of the lamination method provided in embodiment 4 of the present invention.

Description of reference numerals:

10. a lamination table; 20. pressing a cutter; 30. a diaphragm unwinding mechanism; 31. a diaphragm buffer structure; 40. a smoothing mechanism; 41. smoothing rollers; 50. a cutting mechanism; 60. a film clamping mechanism; 61. a grip roller; 70. a blanking mechanism.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

One embodiment of a lamination assembly, as shown in fig. 1-19, includes: the lamination platform comprises lamination platforms 10, a diaphragm unwinding mechanism 30, a pole piece feeding mechanism, a smoothing mechanism 40 and a cutting mechanism 50, wherein a pressing knife 20 is arranged on each lamination platform 10, and the pole piece feeding mechanism is arranged corresponding to the lamination platforms 10. The lamination tables 10 are provided in plurality, the membrane unwinding mechanism 30 is disposed above the lamination tables 10, and the membrane unwinding mechanism 30 is adapted to reciprocate in a transverse direction. The lamination tables 10 are movably arranged, and a plurality of lamination tables 10 can move alternatively to correspond to the membrane unwinding mechanisms 30 respectively. The flattening mechanism 40 is located above the lamination tables 10 and below the membrane unwinding mechanism 30, the flattening mechanism 40 is movably arranged, and the flattening mechanism 40 can drive the membranes to move along the transverse direction. The cutting mechanism 50 is capable of cutting the membrane downstream of the smoothing mechanism 40.

It should be noted that the above-mentioned several lamination tables 10 are referred to as a whole, and the above of the whole is referred to as a whole 10. That is, the plurality of lamination stages 10 are located above the uppermost lamination stage 10. The above-mentioned several lamination tables 10 can move alternately, which means that one lamination table 10 can move to another lamination table 10 to replace it, specifically, after the lamination of the uppermost lamination table 10 is completed, it can move downwards, and the lamination table 10 below it can move to the uppermost for lamination.

It should be further noted that when the lamination table 10 located above moves downward, it can move downward directly in the vertical direction; when the lower lamination table 10 moves upward, the upward-moving lamination table 10 may be moved in the horizontal direction by a predetermined distance to be misaligned in order not to interfere with the upper lamination table 10.

In the present embodiment, as shown in fig. 1 to 19, two lamination stages 10 are provided, and the two lamination stages 10 are provided at a vertical interval. Referring to fig. 1 to 5, after the lamination is performed on the upper lamination station 10 and the lamination is completed on the upper lamination station 10, referring to fig. 6 and 7, the upper lamination station 10 is moved downward and the lower lamination station 10 is moved upward. Alternatively, referring to fig. 8 to 12 and 14 to 17, the lamination is performed on the upper lamination table 10, the lower lamination table 10 is moved to a waiting station at the same height as the upper lamination table 10 to wait after the blanking is completed, and the upper lamination table 10 is moved downward and the lamination table 10 is moved to the lamination station in the transverse direction after the lamination of the upper lamination table 10 is completed, referring to fig. 13, 18 and 19. That is, the two lamination stations 10 may exchange positions in the vertical direction to perform lamination and blanking, respectively.

Of course, the lamination station 10 may be provided in more numbers, such as three, four, etc., only by adapting the lamination efficiency and the blanking efficiency.

It should be noted that the vertical direction is the up-down direction in fig. 1 to 19, and the horizontal direction is the left-right direction in fig. 1 to 19.

The lamination platform 10 after lamination is completed downwards moves to a blanking station for blanking, and the other lamination platform 10 moves to a lamination station for lamination, so that blanking and lamination are simultaneously carried out by the lamination device, the blanking auxiliary time of the lamination can be greatly shortened, the stop time of the lamination process is shortened, and the production efficiency of the battery cell is improved.

It is worth to say that, the pole piece feeding mechanism may be arranged corresponding to the lamination table 10 located at the top, that is, the pole piece feeding mechanism is arranged corresponding to the lamination station.

As shown in fig. 1 to 19, the smoothing mechanism 40 includes a pair of smoothing rollers 41 disposed opposite to each other, the smoothing rollers 41 being movably disposed in the lateral direction, and the pair of smoothing rollers 41 allowing the diaphragm to pass therethrough.

It should be noted that the leveling roller 41 may be telescopically arranged in the longitudinal direction, or may be in an extended state at all times. Specifically, referring to fig. 4 and 5, and fig. 11 and 12, after the last layer of pole piece is stacked, a pair of smoothing rollers 41 longitudinally extends and is respectively disposed on two sides of the diaphragm, and drives the diaphragm to move transversely; in the lamination process, the pair of smoothing rollers 41 can be retracted longitudinally without using the smoothing rollers 41, the use of the smoothing rollers 41 is convenient, and the smoothing rollers 41 are ensured not to interfere with the lamination process. Alternatively, referring to fig. 14 to 19, the pair of smoothing rollers 41 are always in an extended state, that is, the diaphragm is always located between the pair of smoothing rollers 41, and when the diaphragm unwinding mechanism 30 reciprocates in the transverse direction, the pair of smoothing rollers 41 and the diaphragm unwinding mechanism 30 move synchronously.

It should be further noted that when the last layer of pole pieces is completely stacked, the membrane unwinding mechanism 30 stops moving, and the flattening mechanism 40 is used to lay the last layer of membrane on the last layer of pole pieces.

As shown in fig. 1 to 7, the membrane unwinding mechanism 30 includes a membrane buffering structure 31, and a length of a buffering membrane in the membrane buffering structure 31 is adjustable. After the diaphragm is cut off, the diaphragm beyond the smoothing mechanism 40 is pumped back through the diaphragm buffer structure 31, so that the waste of the diaphragm is avoided, and the production quality is improved.

In the present embodiment, referring to fig. 1 to 7, the diaphragm buffering structure 31 includes a fixed roller and a movable roller, the diaphragm is wound on the fixed roller and the movable roller, and the movable roller can move along the transverse direction to adjust the buffering distance of the diaphragm.

As shown in fig. 8 to 19, the lamination device further includes a film clamping mechanism 60, and the film clamping mechanism 60 is capable of clamping the diaphragm above the flattening mechanism 40 and in a position close to the flattening mechanism 40. The membrane clamping mechanism 60 is arranged to clamp the membrane when the membrane does not need to be drawn back, so that the membrane can be used in a manner of being laminated again.

Of course, the film clamping mechanism 60 may be disposed below the smoothing mechanism 40, and accordingly, the cutting position of the cutting mechanism 50 is located downstream of the film clamping mechanism 60.

As shown in fig. 8 to 19, the film clamping mechanism 60 includes a pair of nip rollers 61 arranged oppositely, the nip rollers 61 are movably arranged in the transverse direction, and the pair of nip rollers 61 are adapted to clamp the diaphragm therebetween to clamp and fix the diaphragm.

It should be noted that the grip roller 61 may be provided to be retractable in the longitudinal direction, or may be always in an extended state. Specifically, referring to fig. 11 and 12, after the last layer of pole pieces is stacked, the pair of pinch rollers 61 longitudinally extends and pinches the diaphragm, the pair of pinch rollers 61 and the pair of smoothing rollers 41 transversely move together to lay a layer of diaphragm, and the pair of pinch rollers 61 is used for pinching and fixing the diaphragm after the laying of the diaphragm is completed; in the lamination process, the clamping rollers 61 are not needed to be used, the pair of clamping rollers 61 can be retracted along the longitudinal direction, the clamping rollers 61 are convenient to use, and the clamping rollers 61 are guaranteed not to interfere with the lamination process. Alternatively, referring to fig. 14 to 19, the pair of pinch rollers 61 is always in an extended state, that is, the diaphragm is simultaneously located between the pair of smoothing rollers 41 and between the pair of pinch rollers 61, and the pair of smoothing rollers 41 and the pair of pinch rollers 61 are kept moving synchronously.

It should be noted that the membrane unwinding mechanism 30, the smoothing mechanism 40, and the film clamping mechanism 60 are all disposed on the vertical plate, and the fixed roller, the moving roller, the smoothing roller 41, and the clamping roller 61 are all disposed perpendicular to the vertical plate. The longitudinal direction is a direction perpendicular to the drawing plane in fig. 1 to 19.

Of course, the flattening mechanism 40 may be other mechanisms capable of moving the diaphragm.

As shown in fig. 1 to 19, the lamination device further includes a blanking mechanism 70, and the blanking mechanism 70 is disposed corresponding to the lamination station 10 far from the membrane unwinding mechanism 30 among the plurality of lamination stations 10. That is, the lamination table 10 corresponding to the membrane unwinding mechanism 30 (the lamination table 10 located at the uppermost position) is used for lamination, and no blanking operation is required, so that the blanking mechanism 70 does not need to be correspondingly arranged at the lamination table 10, and the lamination table 10 located therebelow can be provided with the corresponding blanking mechanism 70 according to the blanking requirement.

Specifically, in the present embodiment, as shown in fig. 1 to 7, the blanking mechanism 70 is provided to correspond to the side of the lamination stage 10 located below.

It should be noted that the blanking mechanism 70 is not arranged corresponding to a certain lamination table 10, the arrangement position of the blanking mechanism 70 is arranged corresponding to a blanking station, and the blanking mechanism 70 is used for blanking the battery cell on the lamination table 10 located at the blanking station.

In this embodiment, the blanking mechanism 70 is a blanking jaw.

Example 2

The present embodiment provides a first embodiment of a lamination method applied to the lamination apparatus of example 1, as shown in fig. 1 to 7, the lamination method including:

as shown in fig. 1 to 3, moving one of the lamination tables 10 to a lamination station for lamination, wherein the membrane unwinding mechanism 30 reciprocates above the lamination station to lay a membrane on the lamination table 10 of the lamination station, and a positive plate or a negative plate is stacked on the membrane by the pole piece feeding mechanism;

as shown in fig. 4 and 5, after the last layer of pole piece is stacked on the lamination table 10 located at the lamination station, the smoothing mechanism 40 moves transversely between the lamination table 10 and the membrane unreeling mechanism 30, and drives the membrane to move transversely to lay the membrane on the last layer of pole piece, so as to complete lamination;

as shown in fig. 6 and 7, the lamination station 10 located at the lamination station moves to the blanking station, while another lamination station 10 of the plurality of lamination stations 10 moves to the lamination station, and the cutting mechanism 50 cuts the membrane downstream of the smoothing mechanism 40;

the lamination table 10 at the blanking station performs blanking, and the pressing knife 20 at the lamination table 10 at the lamination station presses the membrane between the flattening mechanism 40 and the membrane unreeling mechanism 30 onto the lamination table 10 for lamination.

It should be noted that, according to the lamination process requirement, the negative electrode plate needs to be wrapped by the positive electrode plate, therefore, the last layer of the electrode plate stacked on the lamination table 10 of the lamination station should be the negative electrode plate, and then the flattening mechanism 40 is used to cover a layer of diaphragm on the outer layer of the negative electrode plate.

In this embodiment, as shown in fig. 4, after the last layer of pole piece is stacked on the lamination table 10 located at the lamination station, a pair of smoothing rollers 41 extends longitudinally, and the pair of smoothing rollers 41 are respectively disposed on both sides of the diaphragm.

In the present embodiment, as shown in fig. 1 to 7, two lamination stations 10 are provided, wherein one lamination station 10 is located at the lamination station for lamination, and the other lamination station 10 is located at the blanking station for blanking.

Smooth mechanism 40 through the setting, can lay last layer diaphragm on the last layer pole piece of lamination station to, smooth the first layer diaphragm that can regard as next electric core between mechanism 40 and the diaphragm unwinding mechanism 30, improve lamination efficiency.

It should be noted that the pressing knife 20 moves along with the lamination table 10, and in the process that the lamination table 10 at the lamination station moves towards the blanking station, the pressing knife 20 keeps pressing the battery cell on the lamination table 10, so as to ensure the overall accuracy of the battery cell during the position transfer process of the lamination table 10.

In this embodiment, after the lamination table 10 at the blanking station is blanked, the lamination table 10 is moved a predetermined distance in a horizontal plane to be removed from the blanking station, and then the lamination table 10 is moved one or more times in vertical and horizontal directions and finally moved to the lamination station.

It should be noted that, after the lamination table 10 located at the blanking station moves out of the blanking station along the horizontal plane, the lamination table 10 located at the lamination station drives the laminated battery cell to move to the blanking station for blanking. Meanwhile, the lamination table 10 moved out from the blanking station moves upward for a certain distance along the vertical direction, then moves to the position right below the lamination station along the horizontal plane where the lamination table is located at the moment, and then moves upward to the lamination station along the vertical direction again.

As shown in fig. 6 and 7, after the lamination is completed, the lamination table 10 located at the lamination station moves to the blanking station and drives the membrane to extend to the blanking station, then the cutting mechanism 50 cuts the membrane at a position close to the pressing knife 20 on the lamination table 10 at the blanking station, and after the cutting mechanism 50 cuts the membrane, the membrane buffer structure 31 withdraws the membrane beyond the flattening mechanism 40, so that the cut end of the membrane corresponds to the lamination table 10 located at the lamination station. The use cuts mechanism 50 and cuts off the diaphragm in the electric core department that is close to the lamination and accomplishes, does not have unnecessary diaphragm on the electric core that makes the lamination accomplish, guarantees electric core production quality to, the diaphragm can furthest's pumpback reuse, avoids extravagant.

It should be noted that the above-mentioned cutting end of the membrane corresponds to the lamination station 10 located at the lamination station, and means that the membrane is drawn back until the cutting end of the membrane is located on the lamination station 10, and the pressing knife 20 is enabled to press the membrane. Specifically, the severed ends of the diaphragms are aligned with the lamination locations on the lamination station 10 to ensure initial diaphragm alignment.

In this embodiment, when the diaphragm is drawn back, the moving roller is moved away from the fixed roller in the lateral direction, and the buffer distance between the moving roller and the fixed roller is increased.

It is worth mentioning that the membrane is movably arranged between the pair of smoothing rollers 41, i.e. the pair of smoothing rollers 41 does not clamp the membrane completely. When the last layer of diaphragm is laid on the pair of smoothing rollers 41, the diaphragm can be smoothed, and the flatness of the diaphragm is guaranteed; after the diaphragm is cut, the diaphragm is drawn back by the tension of the diaphragm and the diaphragm buffer structure 31, and the pair of smoothing rollers 41 can smooth the diaphragm in the drawing back process.

In this embodiment, in the lamination process, each layer of positive electrode plates or negative electrode plates is stacked on the lamination table 10 of the lamination station, and the lamination table 10 moves downward by a preset distance, so that the electrode plate feeding mechanism or the diaphragm unwinding mechanism 30 feeds materials at the same height each time. It is worth mentioning that the two lamination stations 10 are alternately positioned in the vertical direction, and each lamination station 10 is located at the same height each time it moves to the lamination station. Of course, each lamination table 10 is also located at the same height when moving to the blanking station each time, so that blanking is facilitated.

In this embodiment, when the lamination table 10 located at the lamination station completes the downward movement of the lamination, the lamination table 10 located at the blanking station can move toward the lamination station after the blanking; when the lamination table 10 positioned at the lamination station moves to the blanking station, the membrane can be cut and withdrawn, and when the lamination table 10 positioned at the blanking station moves to the lamination station, the membrane can be pressed on the lamination table 10 positioned at the lamination station by using the pressing knife 20; the lamination table 10 located at the lamination station continues to perform the lamination of the next cell, and meanwhile, the lamination table 10 located at the blanking station can perform blanking. Therefore, a plurality of action time sequences are processed in parallel, the lamination auxiliary time can be shortened to the maximum extent, and the production efficiency is improved.

Example 3

The present embodiment provides a second embodiment of the lamination method applied to the lamination apparatus of example 1, as shown in fig. 8 to 13, the lamination method including:

as shown in fig. 8, moving one of the lamination stations 10 to a lamination station for lamination, wherein the membrane unwinding mechanism 30 reciprocates above the lamination station to lay a membrane on the lamination station 10 of the lamination station, and the positive plate or the negative plate is stacked on the membrane by the pole piece feeding mechanism;

as shown in fig. 9 and 10, in the lamination process performed on the lamination table 10 located at the lamination station, another lamination table 10 that completes blanking at the blanking station moves to a waiting station at the same level as the lamination station;

as shown in fig. 11 and 12, after the last layer of pole piece is stacked on the lamination table 10 located at the lamination station, the smoothing mechanism 40 and the film clamping mechanism 60 move transversely between the lamination table 10 and the film unreeling mechanism 30, and drive the film to move transversely to lay the film on the last layer of pole piece, so as to complete lamination;

as shown in fig. 13, the film clamping mechanism 60 clamps the film and the cutting mechanism 50 cuts the film downstream of the smoothing mechanism 40, the lamination table 10 at the lamination station moves downward to the blanking station, and at the same time, the lamination table 10 at the waiting station moves to the lamination station;

the lamination table 10 at the blanking station is used for blanking, and the pressing knife 20 on the lamination table 10 at the lamination station presses the membrane between the smoothing mechanism 40 and the membrane unreeling mechanism 30 on the lamination table 10 for lamination.

In the present embodiment, as shown in fig. 11, after the last layer of pole piece is stacked on the lamination table 10 located at the lamination station, the pair of smoothing rollers 41 and the pair of nip rollers 61 are simultaneously extended, and the pair of smoothing rollers 41 and the pair of nip rollers 61 are respectively disposed on both sides of the separator.

When the last layer of the separator is laid, the pair of nip rollers 61 do not nip the separator tightly, and after the last layer of the separator is laid and before the cutting mechanism 50 cuts the separator, the pair of nip rollers 61 nip and fix the separator. Moreover, the diaphragm is movably arranged between the pair of smoothing rollers 41, namely the pair of smoothing rollers 41 cannot completely clamp the diaphragm, and when the last layer of diaphragm is laid by the pair of smoothing rollers 41, the diaphragm can be smoothed, so that the flatness of the diaphragm is ensured.

Through setting up and smoothing mechanism 40, can lay last layer diaphragm on the last layer pole piece of lamination station to, smooth the diaphragm between mechanism 40 and diaphragm unwinding mechanism 30 and can regard as the first layer diaphragm of next electric core, improve lamination efficiency.

After the lamination table 10 finishes blanking at the blanking station, the lamination table 10 is firstly moved to the waiting station, and when the lamination of the lamination table 10 at the lamination station finishes moving to the blanking station, the lamination table 10 at the waiting station is simultaneously moved to the lamination station, so that new lamination tables 10 can be quickly supplemented at the lamination station, the production preparation time is shortened, and the production efficiency is further improved.

In this embodiment, the blanking station is located below the lamination station, and the waiting station is located in front of the lamination station and is arranged at the same height, so that the lamination table 10 is more convenient to move.

It should be noted that, referring to fig. 12, the smoothing mechanism 40 and the film clamping mechanism 60 move to the left to lay the last layer of the diaphragm, after the laying of the diaphragm is completed, the smoothing mechanism 40 and the film clamping mechanism 60 remain at the left position, and at this time, the diaphragm unwinding mechanism 30 is at the right position; moreover, the waiting station is positioned at the right side of the lamination station, so that the lamination table 10 can move from the waiting station to the lamination station more conveniently.

As shown in fig. 12 and 13, after the lamination is completed, the film clamping mechanism 60 clamps and fixes the membrane, the cutting mechanism 50 cuts the membrane at the position close to the pressing knife 20 on the lamination table 10 of the lamination station, and then the lamination table 10 at the lamination station can move downwards to the blanking station.

It should be noted that by cutting the diaphragm in the above manner, when the lamination table 10 of the waiting station moves to the lamination station, the cut end of the diaphragm can be aligned with the position of the lamination on the lamination table 10, thereby ensuring the alignment degree of the initial diaphragm. Therefore, through the cooperation of the film clamping mechanism 60 and the cutting mechanism 50, the membrane is cut at the lamination station and then subjected to a blanking process, and the membrane does not need to be drawn back after being cut, so that the production efficiency is further improved.

In this embodiment, in the lamination process, each layer of positive electrode plates or negative electrode plates is stacked on the lamination table 10 of the lamination station, and the lamination table 10 moves downward by a preset distance, so that the electrode plate feeding mechanism or the diaphragm unwinding mechanism 30 feeds materials at the same height each time.

It is worth noting that the lamination station 10 located at the waiting station is positioned at the same height as the initial height of the lamination station 10 located at the lamination station. That is, the two lamination tables 10 are alternately positioned in the vertical direction, and each lamination table 10 is located at the same height each time it moves to the lamination station. Of course, each lamination table 10 is also located at the same height when moving to the blanking station each time, so that blanking is facilitated.

In the embodiment, the lamination table 10 located at the lamination station performs lamination, the lamination table 10 located at the blanking station performs blanking, and the lamination table 10 located at the blanking station moves to the waiting station after blanking is completed, so that the lamination can be performed synchronously; the downward movement of the lamination table 10 located at the lamination station and the movement of the lamination table 10 located at the waiting station toward the lamination station can be performed simultaneously. Therefore, a plurality of action time sequences are processed in parallel, the blanking auxiliary time can be shortened to the maximum extent, and the production efficiency is improved.

Example 4

A third embodiment of the laminating method provided in this embodiment, which is applied to the laminating apparatus of embodiment 1, is different from the laminating method described in embodiment 3 in that, in this embodiment, the smoothing mechanism 40 and the film nipping mechanism 60 are always in the extended state in the longitudinal direction, that is, the pair of smoothing rollers 41 and the pair of nip rollers 61 are always in the extended state, as shown in fig. 14 to 19. When the membrane unreeling mechanism 30 moves transversely and reciprocally to lay the membranes, the smoothing mechanism 40 and the membrane clamping mechanism 60 move synchronously along with the membrane unreeling mechanism 30; after the last layer of pole pieces are stacked by the pole piece feeding mechanism, the membrane unreeling mechanism 30 stops moving, and the smoothing mechanism 40 and the membrane clamping mechanism 60 move together along the transverse direction so as to lay the last layer of membrane on the last layer of pole pieces.

It should be noted that, when the lamination table 10 located at the waiting station moves to the lamination station, the pressing knife 20 on the lamination table 10 presses the membrane between the smoothing mechanism 40 (the membrane clamping mechanism 60) and the membrane unreeling mechanism 30 onto the lamination table 10, and then the smoothing mechanism 40 and the membrane clamping mechanism 60 can return to the initial position to re-clamp the membrane to cooperate with the membrane unreeling mechanism 30 to start the next lamination.

In the lamination process, the diaphragm can be smoothed by using the pair of smoothing rollers 41 continuously, the flatness of the diaphragm is guaranteed, and the quality of the battery cell is further guaranteed.

In examples 1 to 4, the blanking station is located below the lamination station. In other alternative embodiments, the blanking station may be located in other positions of the lamination station, for example, the lamination station may be located at the side of the lamination station, and after the lamination station 10 located at the lamination station completes lamination, moves to the blanking station toward the side, another lamination station 10 can move to the lamination station for the next lamination.

According to the above description, the present patent application has the following advantages:

1. the two lamination tables are used for alternately laminating and blanking, so that the lamination and the blanking can be synchronously carried out, and the production efficiency is improved;

2. the movement process of the lamination table and a plurality of blanking actions are combined in the same time sequence section, so that the blanking auxiliary time is shortened, and the efficiency is further improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A lamination assembly, comprising:

a vertical plate;

the laminating table (10) is movably arranged and provided with a plurality of laminating tables, and each laminating table (10) is provided with a pressing knife (20);

the membrane unreeling mechanism (30) is arranged on the vertical plate, the membrane unreeling mechanism (30) is suitable for moving in a transverse reciprocating mode, and the lamination tables (10) can move alternately, so that one of the lamination tables (10) can move to the position below the membrane unreeling mechanism (30);

the pole piece feeding mechanism is arranged corresponding to the lamination table (10);

the smoothing mechanism (40) is arranged on the vertical plate and can be movably arranged, and the smoothing mechanism (40) is positioned above the lamination table (10) and below the membrane unreeling mechanism (30) and is suitable for driving the membrane to move along the transverse direction;

a cutting mechanism (50) adapted to cut the membrane downstream of the smoothing mechanism (40).

2. The lamination device according to claim 1, wherein the smoothing mechanism (40) comprises a pair of smoothing rollers (41) arranged opposite each other, the pair of smoothing rollers (41) allowing the diaphragm to pass between them.

3. The lamination device according to claim 1 or 2, wherein the flattening means (40) are telescopically arranged in a longitudinal direction.

4. The lamination device according to claim 1 or 2, wherein the membrane unwinding mechanism (30) comprises a membrane buffer structure (31), and the buffer membrane length in the membrane buffer structure (31) is adjustable.

5. The lamination device according to claim 1 or 2, further comprising a film clamping mechanism (60), said film clamping mechanism (60) being adapted to clamp the membrane at a position above or below said smoothing mechanism (40) and close to said smoothing mechanism (40).

6. The lamination device according to claim 5, wherein the film clamping mechanism (60) is movable in a transverse direction synchronously with the smoothing mechanism (40).

7. The lamination device according to claim 6, wherein said film clamping means (60) are telescopically arranged in a longitudinal direction.

8. A lamination device according to claim 5, wherein the film clamping means (60) comprises a pair of clamping rollers (61) arranged opposite each other, the pair of clamping rollers (61) being adapted to clamp the film therebetween.

9. The lamination device according to claim 1 or 2, further comprising a blanking mechanism (70), wherein the blanking mechanism (70) is disposed corresponding to the lamination station (10) far away from the membrane unwinding mechanism (30) among the plurality of lamination stations (10).

10. A lamination method applied to the lamination device according to any one of claims 1 to 9, comprising:

one lamination platform (10) in the plurality of lamination platforms (10) moves to a lamination station for lamination, wherein the diaphragm unreeling mechanism (30) reciprocates above the lamination station to lay a diaphragm on the lamination platform (10) of the lamination station, and a positive plate or a negative plate is stacked on the diaphragm through the pole piece feeding mechanism;

after the last layer of pole piece is stacked on a lamination table (10) positioned at a lamination station, a smoothing mechanism (40) moves between the lamination table (10) and a diaphragm unreeling mechanism (30) along the transverse direction and drives a diaphragm to move so as to lay the diaphragm on the last layer of pole piece, and lamination is completed;

the lamination table (10) positioned at the lamination station moves to a blanking station, another lamination table (10) in the plurality of lamination tables (10) moves to the lamination station, and the diaphragm is cut off at the downstream of the flattening mechanism (40) by the cutting mechanism (50);

the laminating table (10) located at the blanking station carries out blanking, and a pressing knife (20) located on the laminating table (10) located at the laminating station presses the diaphragm between the flattening mechanism (40) and the diaphragm unreeling mechanism (30) on the laminating table (10) to carry out lamination.

11. The lamination method according to claim 10, characterized in that after the blanking of the lamination table (10) at the blanking station is completed, the lamination table (10) at the lamination station is moved to a waiting station, and when the movement of the lamination table (10) at the lamination station to the blanking station is completed, the lamination table (10) at the waiting station is moved toward the lamination station.

12. A method of stacking sheets as claimed in claim 11, wherein the blanking station is located below the stacking station and the waiting station is located in front of the stacking station and at the same level.

13. The lamination method according to claim 10, characterized in that after blanking of the lamination table (10) at the blanking station is completed, the lamination table (10) is moved a predetermined distance in the horizontal plane in which it is located to be removed from the blanking station, after which the lamination table (10) is moved one or more times in the vertical and horizontal directions and finally moved to the lamination station.

14. A method of stacking sheets as claimed in claim 10, wherein after the stacking is completed, the stacking table (10) at the stacking station is moved down to the blanking station and carries the membrane to the blanking station, after which the membrane is cut by the cutting means (50).

15. A method of laminating sheets according to claim 14, wherein after the membrane has been cut by the cutting means (50), the membrane buffer structure (31) retracts the membrane beyond the smoothing means (40) so that the cut end of the membrane corresponds to the lamination station (10) at the lamination station.

16. The lamination process according to claim 15, wherein the cutting mechanism (50) cuts the membrane at a location on the lamination station (10) near the blanking station where the knife (20) is pressed.

17. A method for stacking sheets according to claim 10, wherein, after the stacking is completed, the film clamping means (60) located above the smoothing means (40) clamps the film, the cutting means (50) cuts the film, and thereafter the stacking table (10) located at the stacking station is moved towards the blanking station.

18. The lamination method according to claim 10, wherein during lamination, each time a positive electrode sheet or a negative electrode sheet is stacked on the lamination table (10) of the lamination station, the lamination table (10) is moved downward by a predetermined distance to allow the pole sheet feeding mechanism or the separator unwinding mechanism (30) to feed at the same height each time.