CN115275369A - A lamination device and lamination method - Google Patents

Abstract

The invention provides a stacking device and a stacking method, belonging to the technical field of lithium battery production, comprising: a vertical plate; The diaphragm unwinding mechanism is arranged on the vertical plate. The diaphragm unwinding mechanism is suitable for reciprocating movement in the lateral direction, and several lamination stages can move alternately, so that one of the several lamination stages can move to the position of the diaphragm unwinding mechanism. Bottom; pole piece feeding mechanism, corresponding to the lamination table; smoothing mechanism, set on the vertical plate and can be moved, the smoothing mechanism is located above the lamination table and below the diaphragm unwinding mechanism, suitable for driving the diaphragm along the Lateral movement; cutting mechanism adapted to sever the diaphragm downstream of the smoothing mechanism. The invention provides a lamination device, which realizes the simultaneous blanking and lamination, which can greatly shorten the auxiliary time for blanking the laminations, that is, shorten the stop time of the lamination process, and improve the battery core. production efficiency.

Description

Lamination device and lamination method

technical field

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

Background technique

In the process of manufacturing lithium battery stacks, the manipulator is usually used to move left and right to alternately stack positive and negative electrodes on the stacking table, and between adjacent positive and negative electrodes, a layer of separator is stacked through the diaphragm unwinding mechanism. , the diaphragm reciprocates left and right to move the zigzag laminations. After the lamination is completed, the diaphragm is cut off, and then the unloading manipulator is used to clamp the cell and remove the unloading. Therefore, during the cell blanking process, the stacking process needs to be stopped, and the next stack can only be performed after the cell blanking is completed, resulting in low production efficiency.

Contents of the invention

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

In order to solve the above problems, the present invention provides a stacking device, including: a vertical plate; mechanism, arranged on the vertical plate, the diaphragm unwinding mechanism is suitable for reciprocating movement along the transverse direction, and several lamination stages can move alternately, so that one of the plurality of lamination stages can move to the Below the diaphragm unwinding mechanism; the pole piece feeding mechanism is set corresponding to the stacking platform; the smoothing mechanism is arranged on the vertical plate and can be moved, and the smoothing mechanism is located above the stacking platform and the lower part of the diaphragm unwinding mechanism is suitable for driving the diaphragm to move laterally; the cutting mechanism is suitable for cutting the diaphragm downstream of the smoothing mechanism.

Optionally, the smoothing mechanism includes a pair of smoothing rollers arranged oppositely, and the diaphragm is allowed to pass between the pair of smoothing rollers.

Optionally, the smoothing mechanism is arranged telescopically along the longitudinal direction.

Optionally, the diaphragm unwinding mechanism includes a diaphragm buffer structure, and the length of the buffer diaphragm in the diaphragm buffer structure is adjustable.

Optionally, the laminated device further includes a clamping mechanism, which is adapted to clamp the diaphragm at a position above or below the smoothing mechanism and close to the smoothing mechanism.

Optionally, the clamping mechanism can move synchronously with the smoothing mechanism along the lateral direction.

Optionally, the clamping mechanism is configured to be telescopic in the longitudinal direction.

Optionally, the clamping mechanism includes a pair of clamping rollers arranged oppositely, and the pair of clamping rollers is suitable for clamping the diaphragm.

Optionally, the stacking device further includes an unloading mechanism, and the unloading mechanism is arranged correspondingly to a stacking table among the several stacking tables that is far away from the diaphragm unwinding mechanism.

The present invention also provides a stacking method, which is applied to the above-mentioned stacking device, comprising: one of the stacking tables moves to the stacking station for stacking, wherein the diaphragm unwinding mechanism The upper part of the station reciprocates to lay the diaphragm on the lamination table of the lamination station, and the positive or negative electrode sheets are stacked on the diaphragm through the pole piece feeding mechanism; After the last pole piece is placed, the smoothing mechanism moves laterally between the lamination table and the diaphragm unwinding mechanism, and drives the diaphragm to move to lay the diaphragm on the last pole piece to complete the lamination; it is located at the lamination station The stacking table of the stack moves to the unloading station, and the other stacking table among several stacking tables moves to the stacking station, and the cutting mechanism cuts off the diaphragm downstream of the smoothing mechanism; the lamination at the unloading station The table is used for unloading, and the pressing knife on the lamination table of the lamination station presses the diaphragm between the smoothing mechanism and the diaphragm unwinding mechanism on the lamination table for lamination.

Optionally, after the blanking of the lamination table at the unloading station is completed, it moves to the waiting station. The sheet table moves towards the stacking station.

Optionally, the unloading station is located below the stacking station, and the waiting station is located in front of the stacking station and set at equal heights.

Optionally, after the blanking of the stacking station at the unloading station is completed, move a predetermined distance on the horizontal plane where the stacking station is located to exit from the unloading station, and then the stacking station passes along the vertical direction and the horizontal direction Move one or more times, and finally move to the stacking station.

Optionally, after the lamination is completed, the lamination table located at the lamination station moves down to the unloading station, and drives the diaphragm to extend to the unloading station, after which the cutting mechanism cuts off the diaphragm.

Optionally, after the cutting mechanism cuts the diaphragm, the diaphragm buffering structure withdraws the diaphragm beyond the smoothing mechanism, so that the cut end of the diaphragm corresponds to the lamination table at the lamination station.

Optionally, the cutting mechanism cuts off the diaphragm at the position of the pressing knife on the lamination table close to the unloading station.

Optionally, after the lamination is completed, the clamping mechanism located above the smoothing mechanism clamps and fixes the diaphragm, and the cutting mechanism cuts off the diaphragm. After that, the lamination table located at the lamination station moves toward the unloading station.

Optionally, during the stacking process, every time a layer of positive electrode sheets or negative electrode sheets is stacked on the stacking table of the stacking station, the stacking table moves down a preset distance, so that the electrode sheet feeding mechanism or It is the diaphragm unwinding mechanism that feeds materials at the same height each time.

The present invention has the following advantages:

1. In the lamination device provided by the present invention, the lamination table after lamination is moved to the unloading station for unloading, and the other lamination table is moved to the lamination station for lamination. Therefore, the lamination device realizes Simultaneous blanking and stacking can greatly shorten the auxiliary time for blanking the stack, that is, shorten the stop time of the stacking process, and improve the production efficiency of the battery cell.

2. In the lamination device provided by the present invention, after the diaphragm is cut, the diaphragm beyond the smoothing mechanism is withdrawn through the diaphragm buffer structure, which avoids the waste of the diaphragm and improves the production quality.

3. A lamination device provided by the present invention, by setting a clamping mechanism and cooperating with the lamination station to cut the diaphragm, the diaphragm does not need to be drawn back, further reducing the auxiliary time, so as to facilitate the re-lamination of the diaphragm.

4. A lamination device provided by the present invention enables the clamping mechanism and the smoothing mechanism to reciprocate synchronously, and the clamping mechanism does not need to clamp the diaphragm during the reciprocating movement, and only clamps the diaphragm when the lamination is completed. The smoothing mechanism and film clamping mechanism are easy to use.

5. In the lamination device provided by the present invention, when it is necessary to use the smoothing mechanism and/or the clamping mechanism to clamp the diaphragm, the smoothing mechanism and/or the clamping mechanism are extended in the longitudinal direction. In the process, there is no need to use the smoothing mechanism and/or the clamping mechanism, the smoothing mechanism and/or the clamping mechanism can be retracted in the longitudinal direction, the smoothing mechanism and/or the clamping mechanism are easy to use, and the smoothing mechanism and/or The clamping mechanism does not interfere with the lamination process.

6. In the lamination method provided by the present invention, after the lamination table finishes blanking at the unloading station, the lamination table is first moved to the waiting station, and the lamination table at the lamination station is completed to When the unloading station moves, the stacking table waiting for the station moves to the stacking station at the same time. Therefore, a new stacking table can be quickly replenished at the stacking station, shortening the production preparation time and further improving production efficiency. .

7. In the lamination method provided by the present invention, the unloading station is set under the lamination station, and the waiting station is set in front of the lamination station at the same height, so that the movement of the lamination table is more convenient .

8. A lamination method provided by the present invention uses a cutting mechanism to cut the diaphragm near the laminated cell, so that there is no redundant diaphragm on the laminated cell to ensure the production quality of the cell. Moreover, the diaphragm can be retracted to the greatest extent and reused to avoid waste.

9. A lamination method provided by the present invention, through the cooperation of the clamping mechanism and the cutting mechanism, the diaphragm is cut off at the lamination station and then the blanking process is performed. After cutting, it is not necessary to withdraw the diaphragm, and further Increase productivity.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 shows a schematic view of the first state of the stacking device provided by Embodiment 1 of the present invention in the stacking process of the stacking station at the stacking station;

Fig. 2 shows a schematic diagram of the second state of the stacking device provided by Embodiment 1 of the present invention in the stacking process of the stacking station at the stacking station;

Fig. 3 shows a schematic diagram of the third state of the stacking device provided by Embodiment 1 of the present invention in the stacking process of the stacking station at the stacking station;

Fig. 4 shows a schematic diagram of the flattening mechanism of the laminated device provided in Embodiment 1 of the present invention when the diaphragm is clamped;

Fig. 5 shows a schematic diagram of the lamination device smoothing mechanism provided in Embodiment 1 of the present invention when the diaphragm is moved and laid;

Fig. 6 shows a schematic diagram of the lamination device provided by Embodiment 1 of the present invention after the two lamination stages alternately move;

Fig. 7 shows a schematic diagram when the cutting mechanism of the laminated device provided in Embodiment 1 of the present invention cuts the diaphragm;

Figure 8 shows a schematic diagram of the first step of the lamination method provided by Embodiment 3 of the present invention;

Fig. 9 shows a schematic diagram of the second step of the lamination method provided by Embodiment 3 of the present invention;

Fig. 10 shows a schematic diagram of the third step of the lamination method provided by Embodiment 3 of the present invention;

Fig. 11 shows a schematic diagram of the fourth step of the lamination method provided by Embodiment 3 of the present invention;

Fig. 12 shows a schematic diagram of the fifth step of the lamination method provided by Embodiment 3 of the present invention;

Fig. 13 shows a schematic diagram of the sixth step of the lamination method provided by Embodiment 3 of the present invention;

Figure 14 shows a schematic diagram of the first step of the lamination method provided by Embodiment 4 of the present invention;

Fig. 15 shows a schematic diagram of the second step of the lamination method provided by Embodiment 4 of the present invention;

Fig. 16 shows a schematic diagram of the third step of the lamination method provided by Embodiment 4 of the present invention;

Fig. 17 shows a schematic diagram of the fourth step of the lamination method provided by Embodiment 4 of the present invention;

Fig. 18 shows a schematic diagram of the fifth step of the lamination method provided by Embodiment 4 of the present invention;

FIG. 19 shows a schematic diagram of the sixth step of the stacking method provided by Embodiment 4 of the present invention.

Explanation of reference signs:

10. Lamination table; 20. Press knife; 30. Diaphragm unwinding mechanism; 31. Diaphragm buffer structure; 40. Smoothing mechanism; 41. Smoothing roller; 50. Cutting mechanism; 60. Clamping mechanism; 61. Nipping roller; 70, feeding mechanism.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to 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. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example 1

A specific implementation of the stacking device shown in Figures 1 to 19 includes: a stacking table 10, a diaphragm unwinding mechanism 30, a pole piece feeding mechanism, a smoothing mechanism 40 and a cutting mechanism 50, each stack A pressing knife 20 is arranged on the stage 10 , and a pole piece feeding mechanism is arranged correspondingly to the stacking stage 10 . There are several laminating tables 10, and the diaphragm unwinding mechanism 30 is arranged above the several laminating tables 10, and the diaphragm unwinding mechanism 30 is suitable for reciprocating laterally. The stacking table 10 is movable, and several stacking tables 10 can move alternately to correspond to the diaphragm unwinding mechanism 30 respectively. The smoothing mechanism 40 is located above the several stacking tables 10 and below the diaphragm unwinding mechanism 30, and the smoothing mechanism 40 is movable, and the smoothing mechanism 40 can drive the diaphragm to move laterally. The cutting mechanism 50 is able to sever the membrane downstream of the smoothing mechanism 40 .

It is worth noting that, the above-mentioned several stacking stages 10 refer to the above of the plurality of stacking stages 10 as a whole. That is, among the plurality of lamination stages 10 , the uppermost lamination stage 10 is located above. The above-mentioned several stacking tables 10 can move alternately, which means that one stacking table 10 can be moved to another stacking table 10 to replace it. Specifically, when the topmost stacking table 10 is stacked, It can move downwards, and the lamination table 10 located below it can move to the top for lamination.

It should be further explained that when the stacking table 10 at the top moves downward, it can move directly downward in the vertical direction; and when the stacking table 10 at the bottom moves upward, in order not to cause conflict with the stacking table 10 above Interference, the stacking table 10 moving upwards can first move a certain distance in the horizontal direction for misalignment.

In this embodiment, as shown in FIGS. 1 to 19 , there are two stacking stages 10 , and the two stacking stages 10 are vertically spaced apart. Please refer to Fig. 1 to Fig. 5, lamination is carried out on the lamination table 10 located at the top, after the lamination of the lamination table 10 at the top is completed, please refer to Fig. Move, and the lamination table 10 that is positioned at the bottom then moves to the top. Or, referring to Fig. 8 to Fig. 12 and Fig. 14 to Fig. 17, lamination is carried out on the lamination table 10 located above, and the lamination table 10 located below moves to the stacking station 10 located above after blanking is completed. The waiting station of the same height of the sheet table 10 waits. After the stacking table 10 on the top is finished, please refer to Fig. 13, and Fig. 18 and Fig. 19. The stacking platform 10 of the position then moves to the stacking station along the transverse direction. That is to say, the positions of the two stacking stations 10 in the vertical direction can be exchanged to perform stacking and blanking respectively.

Of course, more stacking platforms 10 can also be provided, such as three, four, etc., as long as the stacking efficiency and the blanking efficiency are matched.

It is worth noting that the above-mentioned vertical direction is the up-down direction in FIGS. 1 to 19 , and the above-mentioned horizontal direction is the left-right direction in FIGS. 1 to 19 .

The lamination table 10 after the lamination is completed moves down to the unloading station for unloading, and the other lamination table 10 moves to the lamination station for lamination. Therefore, the lamination device realizes simultaneous unloading and lamination. , can greatly shorten the auxiliary time for blanking the lamination, that is, shorten the stop time of the lamination process, and improve the production efficiency of the battery cell.

It is worth noting that the pole piece feeding mechanism can be arranged correspondingly to the uppermost stacking platform 10 , that is, the pole piece feeding mechanism can be arranged correspondingly to the stacking station.

As shown in FIG. 1 to FIG. 19 , the smoothing mechanism 40 includes a pair of smoothing rollers 41 arranged opposite to each other. The smoothing rollers 41 are movable in the transverse direction, and the diaphragm is allowed to pass between the pair of smoothing rollers 41 .

It is worth noting that the smoothing roller 41 can be arranged telescopically in the longitudinal direction, or can always be in an extended state. Specifically, please refer to Fig. 4 and Fig. 5, and Fig. 11 and Fig. 12. After stacking the last layer of pole pieces, a pair of smoothing rollers 41 protrude longitudinally and are arranged on both sides of the diaphragm, and drive the diaphragm along the Horizontal movement; in the lamination process, a pair of smoothing rollers 41 can be retracted longitudinally without using the smoothing rollers 41. The smoothing rollers 41 are easy to use and ensure that the smoothing rollers 41 do not interfere with the lamination process. Or, referring to Fig. 14 to Fig. 19, a pair of smoothing rollers 41 is always in an extended state, that is, the diaphragm is always between a pair of smoothing rollers 41, when the diaphragm unwinding mechanism 30 reciprocates laterally, A pair of smoothing rollers 41 moves synchronously with the diaphragm unwinding mechanism 30 .

It should be further explained that when the last layer of pole pieces is stacked, the diaphragm unwinding mechanism 30 stops moving, and the smoothing mechanism 40 is used to lay the last layer of diaphragm on the last layer of pole pieces.

As shown in FIG. 1 to FIG. 7 , the diaphragm unwinding mechanism 30 includes a diaphragm buffer structure 31 , and the length of the buffer diaphragm in the diaphragm buffer structure 31 is adjustable. After the diaphragm is cut off, the diaphragm beyond the smoothing mechanism 40 is withdrawn through the diaphragm buffer structure 31, thereby avoiding waste of the diaphragm and improving production quality.

In this embodiment, referring to FIG. 1 to FIG. 7 , the diaphragm buffering structure 31 includes a fixed roller and a moving roller on which the diaphragm is wound. The moving roller can move laterally to adjust the buffering distance of the diaphragm.

As shown in FIGS. 8 to 19 , the stacking device further includes a clamping mechanism 60 , and the clamping mechanism 60 can clamp the diaphragm at a position above and close to the smoothing mechanism 40 . By setting the clamping mechanism 60, the membrane is clamped when the membrane does not need to be drawn back, so as to facilitate the use of the membrane again.

Of course, the clamping mechanism 60 can also be arranged below the smoothing mechanism 40 , and correspondingly, the cutting position of the cutting mechanism 50 is located downstream of the clamping mechanism 60 .

As shown in Figures 8 to 19, the clamping mechanism 60 includes a pair of clamping rollers 61 arranged oppositely, the clamping rollers 61 are movable in the transverse direction, and the diaphragm is suitable for clamping between the pair of clamping rollers 61, so as to Clamp the diaphragm securely.

It is worth noting that the pinch roller 61 can be arranged telescopically in the longitudinal direction, or can always be in an extended state. Specifically, please refer to Fig. 11 and Fig. 12, after stacking the last layer of pole pieces, a pair of clamping rollers 61 stretch out in the longitudinal direction and clamp the diaphragm, a pair of clamping rollers 61 and a pair of smoothing The rollers 41 move laterally together to lay a layer of diaphragm, and use a pair of clamping rollers 61 to clamp and fix the diaphragm after the diaphragm is laid; The holding roller 61 retracts longitudinally, and the holding roller 61 is easy to use, ensuring that the holding roller 61 does not interfere with the lamination process. Or, please refer to Fig. 14 to Fig. 19, a pair of pinch rollers 61 is in stretched state all the time, that is, diaphragm is positioned between a pair of smoothing rollers 41 and between a pair of pinch rollers 61 simultaneously, a pair of smoothing rollers 61 The flat roller 41 and the pair of nip rollers 61 keep moving synchronously.

It is worth noting that the diaphragm unwinding mechanism 30, the smoothing mechanism 40 and the clamping mechanism 60 are all arranged on the vertical plate, and the fixed rollers, moving rollers, smoothing rollers 41 and clamping rollers 61 are all arranged perpendicular to the vertical plate. The above-mentioned longitudinal direction is the direction perpendicular to the drawing plane in FIGS. 1 to 19 .

Certainly, the smoothing mechanism 40 may also be other mechanisms capable of driving the diaphragm to move.

As shown in FIG. 1 to FIG. 19 , the stacking device further includes an unloading mechanism 70 , and the unloading mechanism 70 is arranged correspondingly to the stacking table 10 far away from the diaphragm unwinding mechanism 30 among the several stacking tables 10 . That is to say, the stacking platform 10 corresponding to the diaphragm unwinding mechanism 30 (the stacking platform 10 positioned at the top) is used for stacking and does not require a blanking operation, so the stacking platform 10 does not need to be provided with a corresponding blanking mechanism 70 , the stacking platform 10 located below it can be provided with a corresponding unloading mechanism 70 according to unloading needs.

Specifically, in this embodiment, as shown in FIGS. 1 to 7 , the unloading mechanism 70 is correspondingly arranged on the side of the stacking table 10 located below.

It should be noted that the unloading mechanism 70 is not set corresponding to a certain stacking table 10, the setting position of the unloading mechanism 70 is set corresponding to the unloading station, and the unloading mechanism 70 is used for aligning with the unloading station. The electric core on the stacking platform 10 is unloaded.

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

Example 2

The first specific implementation of the lamination method provided in this embodiment, the method is applied to the lamination device of Example 1, as shown in Figures 1 to 7, the lamination method includes:

As shown in Figures 1 to 3, one of the stacking stations 10 is moved to the stacking station for stacking, wherein the membrane unwinding mechanism 30 reciprocates above the stacking station to provide The diaphragm is laid on the stacking platform 10 at the position, and the positive electrode sheet or the negative electrode sheet is stacked on the diaphragm through the electrode sheet feeding mechanism;

As shown in Figures 4 and 5, after the last layer of pole pieces is stacked on the stacking platform 10 at the stacking station, the smoothing mechanism 40 moves horizontally between the stacking platform 10 and the diaphragm unwinding mechanism 30 Move and drive the diaphragm to move laterally to lay the diaphragm on the last pole piece to complete the lamination;

As shown in Figures 6 and 7, the stacking station 10 positioned at the stacking station moves to the unloading station, and at the same time, another stacking station 10 in several stacking stations 10 moves to the stacking station, and The cutting mechanism 50 cuts off the diaphragm downstream of the smoothing mechanism 40;

The lamination table 10 located at the unloading station performs unloading, and the pressing knife 20 located on the lamination table 10 of the lamination station presses the diaphragm between the smoothing mechanism 40 and the diaphragm unwinding mechanism 30 on the lamination table Laminate on 10.

It is worth noting that, according to the requirements of the stacking process, the negative electrode sheet needs to be wrapped with the positive electrode sheet. Therefore, the last layer of the electrode sheet stacked on the stacking table 10 of the stacking station should be the negative electrode sheet, and then use the smoothing mechanism to 40 Cover a separator on the outer layer of the negative electrode sheet.

In this embodiment, as shown in Figure 4, after the last layer of pole pieces is stacked on the stacking table 10 at the stacking station, a pair of smoothing rollers 41 stretch out longitudinally, and a pair of smoothing rollers 41 are located on both sides of the diaphragm.

In this embodiment, as shown in Figures 1 to 7, there are two stacking stations 10, one of which is located at the stacking station for stacking, and the other stacking station 10 is located at the unloading station Carry out blanking.

By setting the smoothing mechanism 40, the last layer of diaphragm can be laid on the last layer of pole pieces in the stacking station, and the diaphragm between the smoothing mechanism 40 and the diaphragm unwinding mechanism 30 can be used as the first layer of the next cell Diaphragm to improve lamination efficiency.

It is worth noting that the pressing knife 20 moves along with the stacking table 10, and during the movement of the stacking table 10 of the stacking station towards the unloading station, the pressing knife 20 keeps pressing the cells on the stacking table 10. Press to ensure the overall accuracy of the battery cells during the position transfer of the stacking table 10 .

In this embodiment, after the blanking of the stacking platform 10 at the unloading station is completed, it moves a predetermined distance on the horizontal plane where the stacking platform 10 is located to exit from the unloading station. After that, the stacking platform 10 moves along the vertical After one or more movements in the vertical direction and the horizontal direction, it finally moves to the stacking station.

It is worth noting that after the lamination table 10 at the unloading station moves out of the unloading station along the horizontal plane, the lamination table 10 at the lamination station drives the stacked cells to move to the unloading station for unloading. material. Simultaneously, the lamination table 10 that is taken out from the unloading station moves upwards for a certain distance along the vertical direction, then moves to the right below the lamination station along the horizontal plane at this time, and then moves upwards to the lamination station again in the vertical direction. bit.

As shown in Figures 6 and 7, after the lamination is completed, the lamination table 10 at the lamination station moves to the unloading station, and drives the diaphragm to extend to the unloading station. The diaphragm is cut at the position of the pressing knife 20 on the stacking table 10 of the material station, and after the cutting mechanism 50 cuts the diaphragm, the diaphragm buffer structure 31 draws back the diaphragm beyond the smoothing mechanism 40, so that the cut end of the diaphragm It corresponds to the stacking table 10 located at the stacking station. Use the cutting mechanism 50 to cut the diaphragm near the stacked cell, so that there is no redundant diaphragm on the stacked cell to ensure the production quality of the cell, and the diaphragm can be withdrawn to the greatest extent for reuse ,avoid wasting.

It is worth noting that the above-mentioned cut end of the diaphragm corresponds to the lamination table 10 located at the lamination station, which means that the diaphragm is drawn back so that the cut end of the diaphragm is located on the lamination table 10, and the press knife 20 can Press the diaphragm. Specifically, the cut end of the diaphragm is aligned with the lamination position on the lamination table 10 to ensure the alignment of the initial diaphragm.

In this embodiment, when the diaphragm is withdrawn, the moving roller is moved laterally away from the fixed roller to increase the buffer distance between the moving roller and the fixed roller.

It is worth noting that the diaphragm is movable between the pair of smoothing rollers 41 , that is, the pair of smoothing rollers 41 will not completely clamp the diaphragm. When the last layer of diaphragm is laid by a pair of smoothing rollers 41, the diaphragm can be smoothed to ensure the flatness of the diaphragm; and, after the diaphragm is cut, the tension of the diaphragm and the diaphragm buffer structure 31 are used to draw back the diaphragm, A pair of smoothing rollers 41 can also smooth the diaphragm in the withdrawal process.

In this embodiment, during the stacking process, each time a layer of positive electrode sheets or negative electrode sheets is stacked on the stacking table 10 of the stacking station, the stacking table 10 moves down a preset distance, so that the poles The sheet feeding mechanism or the diaphragm unwinding mechanism 30 feeds materials at the same height every time. It is worth noting that the two stacking tables 10 are positioned alternately in the vertical direction, and each stacking table 10 is located at the same height each time it moves to the stacking station. Of course, each stacking platform 10 is also located at the same height when it moves to the unloading station every time, which is convenient for unloading.

In this embodiment, when the lamination table 10 at the lamination station completes the downward movement of the lamination, the lamination table 10 at the unloading station can move to the lamination station; When the laminating table 10 of the sheeting station moves to the unloading station, the diaphragm can be cut and withdrawn. When the laminating table 10 at the unloading station moves to the laminating station, the pressing knife 20 can be used to The diaphragm is pressed on the stacking table 10 at the stacking station; the stacking table 10 at the stacking station continues to stack the next cell, and at the same time, the stacking table 10 at the unloading station can be unloaded . Therefore, processing several action sequences in parallel can shorten the auxiliary time of stacking to the greatest extent and improve production efficiency.

Example 3

The second specific implementation of the lamination method provided in this embodiment, the method is applied to the lamination device of Example 1, as shown in Figures 8 to 13, the lamination method includes:

As shown in Fig. 8, one of the stacking stations 10 is moved to the stacking station for stacking, wherein the diaphragm unwinding mechanism 30 moves back and forth above the stacking station so as to be stacked at the stacking station. A diaphragm is laid on the sheet platform 10, and the positive electrode sheet or the negative electrode sheet is stacked on the diaphragm through the electrode sheet feeding mechanism;

As shown in Figures 9 and 10, during the stacking process on the stacking table 10 located at the stacking station, another stacking table 10 that completes blanking at the blanking station moves to the stacking station, etc. High waiting stations;

As shown in Figures 11 and 12, after the last layer of pole pieces is stacked on the stacking platform 10 at the stacking station, the smoothing mechanism 40 and the clamping mechanism 60 are placed on the stacking platform 10 and the diaphragm unwinding mechanism. 30 to move laterally, and drive the diaphragm to move laterally to lay the diaphragm on the last pole piece to complete the lamination;

As shown in Figure 13, the film clamping mechanism 60 clamps the diaphragm, and the cutting mechanism 50 cuts the diaphragm downstream of the smoothing mechanism 40, and the lamination table 10 located at the lamination station moves down to the unloading station, Simultaneously, the stacking table 10 positioned at the waiting station moves to the stacking station;

The lamination table 10 located at the unloading station performs unloading, and the pressing knife 20 located on the lamination table 10 of the lamination station presses the diaphragm between the smoothing mechanism 40 and the diaphragm unwinding mechanism 30 on the lamination table Laminate on 10.

In this embodiment, as shown in FIG. 11 , after the last layer of pole pieces is stacked on the stacking table 10 at the stacking station, a pair of smoothing rollers 41 and a pair of clamping rollers 61 are stretched out simultaneously, And a pair of smoothing rollers 41 and a pair of clamping rollers 61 are respectively arranged on both sides of the diaphragm.

It should be noted that when the last layer of diaphragm is laid, the pair of clamping rollers 61 do not clamp the diaphragm. Hold the diaphragm in place. Moreover, the diaphragm is movable between a pair of smoothing rollers 41, that is, the pair of smoothing rollers 41 will not completely clamp the diaphragm, and when the pair of smoothing rollers 41 lay the last layer of diaphragm, the diaphragm can be Smooth to ensure the flatness of the diaphragm.

It is worth noting that, according to the requirements of the stacking process, the negative electrode sheet needs to be wrapped with the positive electrode sheet. Therefore, the last layer of the electrode sheet stacked on the stacking table 10 of the stacking station should be the negative electrode sheet, and then use the smoothing mechanism to 40 Cover a separator on the outer layer of the negative electrode sheet.

By setting the smoothing mechanism 40, the last layer of diaphragm can be laid on the last layer of pole pieces in the stacking station, and the diaphragm between the smoothing mechanism 40 and the diaphragm unwinding mechanism 30 can be used as the first layer of the next cell Diaphragm to improve lamination efficiency.

It is worth noting that the pressing knife 20 moves along with the stacking table 10, and during the movement of the stacking table 10 of the stacking station towards the unloading station, the pressing knife 20 keeps pressing the cells on the stacking table 10. Press to ensure the overall accuracy of the battery cells during the position transfer of the stacking table 10 .

After the stacking station 10 finishes blanking at the blanking station, the stacking station 10 is moved to the waiting station first, and when the stacking station 10 stacks at the stacking station are completed moving to the feeding station, the waiting station is moved to the waiting station. The stacking table 10 of the station moves to the stacking station at the same time, therefore, new stacking tables 10 can be quickly replenished at the stacking station, shorten production preparation time, and further improve production efficiency.

In this embodiment, the unloading station is located below the stacking station, and the waiting station is located in front of the stacking station and set at the same height, so that the movement of the stacking table 10 is more convenient.

It is worth noting that referring to FIG. 12 , the smoothing mechanism 40 and the clamping mechanism 60 move to the left to lay the last layer of diaphragm. After the diaphragm is laid, the smoothing mechanism 40 and the clamping mechanism 60 remain at the left position. And now, the diaphragm unwinding mechanism 30 is in the right position; and the waiting station is located on the right side of the stacking station, which is more convenient for the stacking table 10 to move from the waiting station to the stacking station.

As shown in Figures 12 and 13, after the lamination is completed, the clamping mechanism 60 clamps and fixes the diaphragm, and the cutting mechanism 50 cuts the diaphragm at the position of the pressing knife 20 on the lamination table 10 close to the lamination station. Afterwards, the lamination table 10 located at the lamination station can move down to the unloading station.

It is worth noting that, when the diaphragm is cut in the above-mentioned 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 lamination position on the lamination table 10, ensuring Alignment of the initial septum. Therefore, through the cooperation of the clamping mechanism 60 and the cutting mechanism 50, the diaphragm is cut off at the stacking station and then the unloading process is performed. After cutting, the diaphragm does not need to be drawn back, further improving production efficiency.

In this embodiment, during the stacking process, each time a layer of positive electrode sheets or negative electrode sheets is stacked on the stacking table 10 of the stacking station, the stacking table 10 moves down a preset distance, so that the poles The sheet feeding mechanism or the diaphragm unwinding mechanism 30 feeds materials at the same height every time.

It is worth noting that the initial heights of the stacking table 10 at the waiting station and the stacking station 10 at the stacking station are set at the same height. That is, the two stacking tables 10 are positioned alternately in the vertical direction, and each stacking table 10 is located at the same height each time it moves to the stacking station. Of course, each stacking platform 10 is also located at the same height when it moves to the unloading station every time, which is convenient for unloading.

In this embodiment, the lamination table 10 at the lamination station performs lamination, the lamination table 10 at the unloading station performs blanking, and the lamination table 10 at the unloading station moves to The waiting station can be carried out synchronously; the lamination table 10 located at the lamination station moves downward after the lamination is completed, and the lamination table 10 located at the waiting station moves toward the lamination station, which can also be carried out synchronously. Therefore, processing several action sequences in parallel can shorten the auxiliary time of blanking to the greatest extent and improve production efficiency.

Example 4

The third specific implementation of the lamination method provided in this embodiment, this method is applied to the lamination device of Example 1, as shown in Figures 14 to 19, the lamination method is compared to the lamination described in Example 3 The difference of the sheet method is that in this embodiment, the smoothing mechanism 40 and the clamping mechanism 60 are always in the extended state along the longitudinal direction, that is, a pair of smoothing rollers 41 and a pair of pinch rollers 61 are always in the extended state. Out of state. When the diaphragm unwinding mechanism 30 reciprocates horizontally to lay the diaphragm, the smoothing mechanism 40 and the clamping mechanism 60 move synchronously with the diaphragm unwinding mechanism 30; The rolling mechanism 30 stops moving, and the smoothing mechanism 40 and the clamping mechanism 60 move laterally together to lay the last layer of diaphragm on the last layer of pole piece.

It is worth noting that when the lamination table 10 at the waiting station moves to the lamination station, the pressing knife 20 on the lamination table 10 will smooth the gap between the smoothing mechanism 40 (clamping mechanism 60) and the diaphragm unwinding mechanism 30. After the diaphragm in between is pressed on the stacking platform 10, the smoothing mechanism 40 and the clamping mechanism 60 can return to the initial position to clamp the diaphragm again, so as to cooperate with the diaphragm unwinding mechanism 30 to start the next lamination.

During the stacking process, a pair of smoothing rollers 41 can be used to continuously smooth the separator to ensure the flatness of the separator and thus the quality of the battery cell.

It should be noted that, in Embodiment 1 to Embodiment 4, the unloading station is located below the stacking station. In other alternative embodiments, the unloading station can also be located in other orientations of the stacking station, for example, it can be on the side of the stacking station, when the stacking station 10 at the stacking station is finished stacking , after moving sideways to the unloading station, another lamination table 10 can move to the lamination station for the next lamination.

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

1. The lamination and blanking are carried out alternately through two lamination tables, which can make the lamination and blanking be carried out synchronously and improve the production efficiency;

2. Combining the movement process of the stacking table and several unloading actions in the same time sequence, shortening the auxiliary unloading time and further improving efficiency.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (18)

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.

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