CN217691263U - Lamination device and battery production line with same - Google Patents

Abstract

The utility model provides a lamination device and have its battery production line, wherein, the lamination device includes: a lamination table; the first pole piece processing mechanism comprises a first unreeling structure, a heat composite structure, a first cutting structure and a first clamping structure which are sequentially arranged in the direction towards the lamination table, wherein the first unreeling structure comprises a cathode material belt unreeling structure and two diaphragm material belt unreeling structures; the second pole piece processing mechanism is arranged opposite to the first pole piece processing mechanism, the second pole piece processing mechanism comprises a second unreeling structure, a second cutting structure and a second clamping structure which are sequentially arranged along the direction of the lamination table, and the second unreeling structure comprises an anode material belt unreeling structure. When the lamination device is used for laminating, only the alignment degree of the composite unit and the positive plate needs to be ensured, so that the precision control difficulty is reduced. Meanwhile, the lamination device does not need to independently cut the cathode material belt and the diaphragm material belt, so that the production process is simplified.

Description

Lamination device and battery production line with same

Technical Field

The utility model relates to a battery production facility technical field, concretely relates to lamination device and have its battery production line.

Background

Lamination is one of the processes of battery production, in which a positive electrode sheet, a separator and a negative electrode sheet are sequentially stacked and a cell is formed after hot pressing. In the prior art, in order to prevent the edge contact short circuit of the positive electrode sheet and the negative electrode sheet, the dimensional relationship of the positive electrode sheet, the separator and the negative electrode sheet is generally set as follows: the diaphragm is the largest and plays a role in separating the positive plate from the negative plate; the area of the negative plate is smaller than that of the diaphragm; the area of the positive plate is smaller than that of the negative plate.

In the structure, the sizes of the positive plate, the diaphragm and the negative plate are different, so that the three plates need to be cut separately, and the process steps are complicated. Meanwhile, when lamination is carried out, the alignment degree of four materials (diaphragm-negative plate-diaphragm-positive plate) with three sizes needs to be ensured, so that the requirement on processing precision is high, and the equipment cost is high.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the battery lamination technology among the prior art in the technology complicacy, defect that the required precision is high to a lamination device and have its battery production line are provided.

In order to solve the above problem, the utility model provides a lamination device, include: a lamination table; the first pole piece processing mechanism comprises a first unreeling structure, a thermal compound structure, a first cutting structure and a first clamping structure which are sequentially arranged in the direction facing the lamination table, wherein the first unreeling structure comprises a negative pole material belt unreeling structure and two diaphragm material belt unreeling structures; the second pole piece processing mechanism is arranged opposite to the first pole piece processing mechanism, the lamination table is located between the first pole piece processing mechanism and the second pole piece processing mechanism, the second pole piece processing mechanism comprises a second unreeling structure, a second cutting structure and a second clamping structure which are sequentially arranged along the direction of the lamination table, and the second unreeling structure comprises an anode material tape unreeling structure.

Optionally, the first and second grasping structures each include: along first clamping jaw, second clamping jaw and the third clamping jaw that sets gradually towards lamination platform direction, first clamping jaw, second clamping jaw and third clamping jaw homoenergetic move along the circulation direction of material.

Optionally, the second jaw and the third jaw are each movable in a direction perpendicular to the flow of material.

Optionally, the first jaw is movable between upstream and downstream of the first severing arrangement or the second severing arrangement.

Optionally, the jaws of the first jaw, the second jaw, and the third jaw can be nested.

Optionally, the first cutting structure and the second cutting structure are both die-cutting rule.

Optionally, the thermal composite structure is a heated press roll.

Optionally, the second diode processing mechanism further comprises a conveying structure, and the conveying structure is located between the second unwinding structure and the second cutting structure.

Optionally, a position detection structure is arranged downstream of the cathode material belt unwinding structure and/or downstream of the anode material belt unwinding structure.

The invention also provides a battery production line which comprises the laminating device.

The utility model has the advantages of it is following:

utilize the technical scheme of the utility model, the lamination device is when the lamination, and first pole piece processing agency takes negative pole material and diaphragm material to unreel to carry out the complex through hot composite construction and obtain the compound material area, first cutting structure cuts the compound material area and forms the compound unit including negative pole piece and diaphragm. The second pole piece processing mechanism unreels the anodal material area, and the second cuts off the structure and cuts the anodal material area and form a plurality of positive plates. The first clamping structure places the composite unit on the lamination table, the second clamping structure places the positive plate on the lamination table, and lamination is completed in an alternating mode of the first clamping structure and the second clamping structure. Because the widths of the negative plate and the diaphragm of the composite unit are the same, only the alignment degree of the composite unit and the positive plate needs to be ensured when lamination is carried out, and the precision control difficulty is reduced. Meanwhile, the lamination device does not need to independently cut the cathode material belt and the diaphragm material belt, so that the production process is simplified. Consequently the technical scheme of the utility model the battery lamination technology among the prior art in the technology complicated, the defect that the required precision is high has been solved.

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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic view of a lamination device according to the present invention;

FIG. 2 shows an enlarged schematic view at A in FIG. 1;

fig. 3 is a schematic view showing the cooperation between the first clamping structure or the second clamping structure of the lamination device in fig. 1 and a pole piece;

fig. 4 shows a schematic view of the first or second gripping structure of the lamination device of fig. 1;

figure 5 shows a schematic view of the first, second and third jaws of the lamination arrangement of figure 1;

FIG. 6 is a schematic diagram illustrating a lamination action performed by the lamination device of FIG. 1;

FIG. 7 is a schematic diagram of the lamination assembly of FIG. 1 performing a second lamination operation;

fig. 8 shows a schematic view of the lamination device of fig. 1 performing a third action of lamination;

FIG. 9 is a schematic diagram illustrating a fourth lamination action performed by the lamination device of FIG. 1;

FIG. 10 is a schematic diagram illustrating a fifth laminating action performed by the laminating device of FIG. 1;

FIG. 11 is a schematic diagram illustrating a sixth laminating action performed by the laminating device of FIG. 1;

FIG. 12 is a schematic diagram illustrating a seventh lamination action performed by the lamination device of FIG. 1;

fig. 13 shows a schematic view of the lamination device of fig. 1 performing an action eight of lamination;

fig. 14 is a schematic diagram of a cell structure after lamination is performed by the lamination device in fig. 1; and

fig. 15 shows a schematic front view of the cell of fig. 14.

Description of the reference numerals:

10. a lamination table; 20. a first pole piece processing mechanism; 21. a first unwinding structure; 211. a negative material belt unwinding structure; 212. the unwinding structure of the diaphragm material belt; 22. a thermally composite structure; 23. a first severing structure; 24. a first gripping structure; 30. a second pole piece processing mechanism; 31. a second unwinding structure; 32. a second severing arrangement; 33. a second grasping structure; 34. a conveying structure; 40. a position detection structure; 101. a first jaw; 102. a second jaw; 103. a third jaw; 200. an electric core; 201. a negative plate; 202. a diaphragm; 203. and (4) a positive plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work 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", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 meaning 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 mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, a lamination device of the present embodiment includes a lamination table 10, a first pole piece processing mechanism 20, and a second pole piece processing mechanism 30. The first pole piece processing mechanism 20 includes a first unreeling structure 21, a thermal compound structure 22, a first cutting structure 23, and a first clamping structure 24, which are sequentially arranged in a direction toward the lamination table 10, where the first unreeling structure 21 includes a negative electrode material tape unreeling structure 211 and two diaphragm material tape unreeling structures 212. The second pole piece processing mechanism 30 is disposed opposite to the first pole piece processing mechanism 20, and the lamination stage 10 is located between the first pole piece processing mechanism 20 and the second pole piece processing mechanism 30. The second pole piece processing mechanism 30 includes a second unwinding structure 31, a second cutting structure 32, and a second clamping structure 33, which are sequentially arranged along a direction toward the lamination table 10, where the second unwinding structure 31 includes an anode material tape unwinding structure.

By using the technical scheme of this embodiment, when the lamination device performs lamination, the first pole piece processing mechanism 20 unwinds the negative electrode material tape and the diaphragm material tape, and performs thermal compounding through the thermal compound structure 22 to obtain a compound material tape, and the first cutting structure 23 cuts the compound material tape to form a compound unit including the negative electrode piece 201 and the diaphragm 202. The second electrode processing mechanism 30 unreels the positive electrode material strip, and the second cutting mechanism 32 cuts the positive electrode material strip to form a plurality of positive electrodes 203. The first clamping structure 24 places the composite unit on the lamination table 10, and the second clamping structure 33 places the positive electrode sheet 203 on the lamination table, and lamination is completed by the alternating manner of the first clamping structure 24 and the second clamping structure 33. Because the widths of the negative electrode sheet 201 and the diaphragm 202 of the composite unit are the same, only the alignment degree of the composite unit and the positive electrode sheet 203 needs to be ensured when lamination is carried out, and therefore the precision control difficulty is reduced. Meanwhile, the laminating device does not need to cut the cathode material belt and the diaphragm material belt independently, so that the production process is simplified. Therefore, the technical scheme of the embodiment overcomes the defects of complex process and high precision requirement in the battery lamination process in the prior art.

It should be noted that the first unwinding structure 21 includes a negative electrode material tape unwinding structure 211 and two membrane material tape unwinding structures 212. The cathode material belt unwinding structure 211 and the membrane material belt unwinding structure 212 are both rotating shafts. As can be seen from fig. 1, the negative electrode material tape unwinding structure 211 and one of the membrane material tape unwinding structures 212 are located at approximately the same horizontal position, and the negative electrode material tape unwinding structure 211 is slightly higher than the membrane material tape unwinding structure 212. The other membrane material belt unwinding structure 212 is located above the two unwinding structures.

As can be seen from fig. 1, after one negative electrode material tape and two diaphragm material tapes are unwound, a three-layer structure is formed, that is, a diaphragm material tape-negative electrode material tape-diaphragm material tape form, and the separator material tape is continuously conveyed downstream.

It should be noted that the thermal composite structure 22 is used for thermally compounding the unreeled negative electrode material tape and the two layers of diaphragm material tapes to form a composite material tape.

It should be noted that the first cutting structure 23 is used for cutting the composite strip to form the composite unit. As will be understood by those skilled in the art in conjunction with fig. 14 and 15, one composite unit includes two layers of separators 202 and a negative electrode sheet 201 between the two layers of separators 202, and the negative electrode sheet 201 and the separators 202 are equal in width by the cutting of the first cutting structure 23.

It should be noted that the first gripper structure 24 is used to transfer the cut composite units onto the lamination station 10, or the first gripper structure 24 is used to grip the end of the composite strip and draw it downstream of the first cutting structure 23.

It should be noted that the second pole piece processing mechanism 30 and the first pole piece processing mechanism 20 are respectively located on two sides of the lamination table 10, and the position relationship between the two mechanisms in the circumferential direction is 180 ° in this example, that is, they are oppositely arranged. Of course, "opposite arrangement" in this embodiment also includes the case where the first pole piece processing mechanism 20 and the second pole piece processing mechanism 30 are at other angles in the circumferential direction.

In the second electrode sheet processing mechanism 30, the second unwinding structure 31 can unwind the anode material tape, and the unwound anode material tape is cut by the second cutting structure 32 to form a plurality of anode sheets 203.

Note that the second grasping structure 33 functions similarly to the first grasping structure 24 described above, that is, the second grasping structure 33 is used to transfer the cut positive electrode tab 203 onto the lamination table 10, or the second grasping structure 33 is used to grasp an end portion of the positive electrode tab 203 and pull it downstream of the second cutting structure 32.

Therefore, the composite unit and the positive electrode sheet are stacked in a reciprocating manner by the reciprocating feeding of the first clamping structure 24 and the second clamping structure 33, so that lamination is realized, and a lamination form of 'membrane-negative electrode sheet-membrane-positive electrode sheet' is formed.

In addition, a pressing mechanism is arranged on the lamination table 10 and can press the materials, so that the position accuracy of the lamination after the composite unit and the positive plate 203 are laminated is ensured.

As shown in fig. 3 to 5, in the technical solution of the present embodiment, each of the first grasping structure 24 and the second grasping structure 33 includes: the first clamping jaw 101, the second clamping jaw 102 and the third clamping jaw 103 are arranged in sequence in the direction towards the laminating table 10, and the first clamping jaw 101, the second clamping jaw 102 and the third clamping jaw 103 can move in the circulation direction of the materials.

In particular, as can be seen in connection with fig. 5, the first gripping structure 24 and the second gripping structure 33 are identical in structure, except that they are arranged in mirror symmetry along the lamination table 10, and the material gripped differs. The structure and operation of the first gripping structure 24 will be explained below.

As can be seen in connection with fig. 3 and 4, the first jaw 101, the second jaw 102 and the third jaw each comprise two oppositely arranged jaws for gripping both sides of the material. The first clamping jaw 101, the second clamping jaw 102 and the third clamping jaw 103 comprise an upper jaw and a lower jaw, and the upper jaw and the lower jaw are controlled to be opened and closed through a voice coil motor so as to clamp materials.

As can be seen from fig. 3 and 4, the first clamping jaw 101, the second clamping jaw 102, and the third clamping jaw 103 are all fixed on the same linear rail, and the three can move independently through the linear driving mechanism, that is, the first clamping jaw 101, the second clamping jaw 102, and the third clamping jaw 103 can move independently in the left-right direction shown in fig. 5. Wherein the first jaw 101 mainly functions to pull the strip of material and the second jaw 102 and the third jaw 103 mainly function to transfer the cut material to the lamination station 10.

Preferably, the second jaw 102 and the third jaw 103 are each movable in a direction perpendicular to the flow of the material. In particular, after the second jaw 102 and the third jaw 103 have deposited the material on the lamination station 10, it is necessary to separate it from the material and return it to the vicinity of the first severing structure 23. As can be seen in connection with fig. 5, the second jaw 102 and the third jaw 103 are movable in the up-and-down direction shown in fig. 5 to be withdrawn and separated from the material after the transfer of the material has been completed.

Preferably, the first jaw 101 is movable between upstream and downstream of the first or second severing arrangement 23, 32. Taking the first cutting structure 23 as an example, the upstream and downstream directions of the first cutting structure 23 are the left and right directions shown in fig. 1. That is, the first jaw 101 is movable in the left-right direction of the first cutting structure 23. When a material cut is completed, the first jaw 101 is moved to an upstream position of the first severing arrangement 23 and clamps the end of the material, and then the first jaw 101 is moved to a downstream position of the first severing arrangement 23, ready for the next cut.

In the solution of the present embodiment, as shown in fig. 5, the clamping plate of the first clamping jaw 101, the clamping plate of the second clamping jaw 102 and the clamping plate of the third clamping jaw 103 can be nested. As can be seen from fig. 5, the first clamping jaw 101, the second clamping jaw 102 and the third clamping jaw 103 need to be arranged close to each other, so that the clamping plates of the three clamping jaws are different. From a top view the clamping plate of the first clamping jaw 101 is shaped like a 'probabal', the clamping plate of the second clamping jaw 102 is rectangular and the clamping plate of the third clamping jaw 103 projects towards the clamping plate of the first clamping jaw 101. The jaws of the first jaw 101, the second jaw 102 and the third jaw 103 may nest when they are brought closer together.

As will be appreciated by those skilled in the art, for the first gripper structure 24, the material gripped by the first jaw 101 is a composite tape, and the material transferred by the second jaw 102 and the third jaw 103 is a composite unit.

As described above, the structure of the second clamping structure 33 is the same as that of the first clamping structure 24, and the difference is only between the direction of arrangement and the material to be clamped (for the second clamping structure 33, the material to be clamped by the first clamping jaw 101 is the positive electrode material tape, and the material to be transferred by the second clamping jaw 102 and the third clamping jaw 103 is the positive electrode sheet 203), so the description is omitted here.

Limitedly, the first cutting structure 23 and the second cutting structure 32 are both die-cutting blades.

Preferably, the thermal composite structure 22 is a heated press roll. The hot press roller can carry out the hot recombination to two-layer diaphragm material area and one deck negative pole material area to form composite material area. Meanwhile, the hot-pressing roller can also play a role in conveying the composite material belt.

As shown in fig. 1, in the technical solution of the present embodiment, the second diode processing mechanism 30 further includes a conveying structure 34, and the conveying structure 34 is located between the second unwinding structure 31 and the second cutting structure 32. And the transport structure is preferably a transport roller.

As shown in fig. 1, in the technical solution of this embodiment, a position detection structure 40 is disposed downstream of the negative material tape unwinding structure 211 and/or downstream of the positive material tape unwinding structure. The position detecting structure 40 is a CCD sensor, and the CCD sensor is used for detecting the position degree of the negative material tape and the positive material tape.

Based on the structure, the specific action of the lamination device for lamination is described as follows:

the first action is as follows: as shown in fig. 6, the lamination arrangement is in an initial position, in which the first jaw 101 of the first gripping structure 24 is located upstream of the first severing structure 23 and the second jaw 102 and the third jaw 103 of the first gripping structure 24 are located downstream of the first severing structure 23. The first jaw 101 of the second gripping structure 33 is located at an upstream position of the second cutting structure 32, and the second jaw 102 and the third jaw 103 of the second gripping structure 33 are located at a downstream position of the second cutting structure 32;

and the second action: as shown in fig. 7, the first cutting structure 23 is cut and a composite unit is formed;

and action three: as shown in fig. 8, the second and third jaws 102 and 103 of the first gripper structure 24 move the composite unit onto the lamination table 10, while the pressing mechanism on the lamination table 10 presses the composite unit;

and the fourth action: as shown in fig. 9, the first gripping structure 24 moves downstream of the first severing structure 23 and draws the composite strip;

and fifthly: as shown in fig. 10, the second jaw 102 and the third jaw 103 of the first gripper structure 24 are moved back to the downstream position of the first severing structure 23, and the first jaw 101, the second jaw 102 and the third jaw 103 of the first gripper structure 24 are brought closer together, and the third jaw 103 of the first gripper structure 24 grips the end of the composite tape. Meanwhile, the second cutting structure 32 cuts to form a positive plate 203;

action six: as shown in fig. 11, the first jaw 101 and the second jaw 102 of the first gripper structure 24 are moved back to their original positions. The second clamping jaw 102 and the third clamping jaw 103 of the second clamping structure 3 move the positive plate 203 to the lamination table 10 and are stacked above the composite unit, and meanwhile, the pressing mechanism on the lamination table 10 presses the positive plate 203;

and the seventh action: as shown in fig. 12, the second gripper structure 33 moves downstream of the second cutting structure 32 and pulls the positive electrode material tape;

and eight actions: the second jaw 102 and the third jaw 103 of the second gripping structure 33 are moved back to the downstream position of the second severing structure 32 and the first jaw 101, the second jaw 102 and the third jaw 103 of the second gripping structure 33 are brought closer to each other and the third jaw 103 of the second gripping structure 33 grips the end of the strip of composite material.

Then, each jaw is moved back to the initial position of action one and is continuously cycled from action one to action eight, thereby completing the lamination.

The embodiment also provides a battery production line which comprises the laminating device.

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 (10)

1. A lamination assembly, comprising:

a lamination table (10);

the first pole piece processing mechanism (20) comprises a first unreeling structure (21), a heat composite structure (22), a first cutting structure (23) and a first clamping structure (24) which are sequentially arranged along the direction facing the lamination table (10), wherein the first unreeling structure (21) comprises a negative pole material tape unreeling structure (211) and two diaphragm material tape unreeling structures (212);

second pole piece processing agency (30), with first pole piece processing agency (20) sets up relatively, and lamination platform (10) are located first pole piece processing agency (20) with between second pole piece processing agency (30), second pole piece processing agency (30) include along the orientation second that lamination platform (10) direction set gradually unreels structure (31), second cut structure (32) and second clamp and get structure (33), the second unreels structure (31) and includes that anodal material area unreels the structure.

2. The lamination device according to claim 1, characterized in that said first gripping structure (24) and said second gripping structure (33) each comprise: the stacking device comprises a first clamping jaw (101), a second clamping jaw (102) and a third clamping jaw (103), wherein the first clamping jaw (101), the second clamping jaw (102) and the third clamping jaw (103) are sequentially arranged in the direction towards the stacking table (10), and can move in the flowing direction of materials.

3. A lamination arrangement according to claim 2, wherein the second jaw (102) and the third jaw (103) are each movable in a direction perpendicular to the flow of material.

4. A lamination device according to claim 2, wherein the first jaw (101) is movable between upstream and downstream of the first severing arrangement (23) or of the second severing arrangement (32).

5. The lamination device according to claim 2, wherein the jaws of the first jaw (101), the second jaw (102) and the third jaw (103) are nestable.

6. A lamination device according to any one of claims 1 to 4, wherein both the first severing arrangement (23) and the second severing arrangement (32) are die-cutters.

7. A lamination arrangement according to any one of claims 1 to 4, wherein the thermal composite structure (22) is a heated press roll.

8. The lamination device according to any one of claims 1 to 4, wherein the second diode processing means (30) further comprise a conveying structure (34), said conveying structure (34) being located between the second unwinding structure (31) and the second severing structure (32).

9. The lamination device according to any one of claims 1 to 4, wherein a position detection structure (40) is provided downstream of the cathode tape unwinding structure (211) and/or downstream of the anode tape unwinding structure.

10. A battery production line, characterized by comprising a lamination device according to any one of claims 1 to 9.

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