CN217848056U

CN217848056U - Pressing cutter mechanism for battery lamination and lamination equipment

Info

Publication number: CN217848056U
Application number: CN202221652334.3U
Authority: CN
Inventors: 李佳明
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-11-18
Anticipated expiration: 2032-06-28

Abstract

The utility model provides a battery lamination pressing knife mechanism, which is used for pressing a diaphragm or a pole piece on a lamination table, and comprises an installation base station, wherein the installation base station is arranged on one side of the lamination table in a guiding and moving way; a top plate which can be driven to vertically move on the mounting base; and a blade pressing unit including a base plate held on the top plate and capable of being horizontally driven, and a blade pressing fixed to the base plate, wherein the blade pressing is caused to penetrate into the laminated separator or pole piece by the movement of the base plate. The utility model discloses a battery is die cutter mechanism for lamination, the vertical removal of roof can realize the height control of die cutter unit on the installation base station, and base plate horizontal migration is on the roof, then can make the die cutter more dark visit into in diaphragm or the pole piece, the die cutter compresses tightly diaphragm or pole piece to the edge part who levels diaphragm or pole piece gets off in the effect that compresses tightly of die cutter, improves the surface quality of diaphragm or pole piece, reduces the fold of diaphragm or pole piece.

Description

Pressing cutter mechanism for battery lamination and lamination equipment

Technical Field

The utility model relates to a technical field is made to the lamination battery, in particular to battery is pressing sword mechanism for lamination. Additionally, the utility model discloses still relate to a lamination equipment.

Background

Along with the development of the technology, high-speed lamination square lithium batteries are favored by various large lithium battery manufacturers, compared with the traditional winding process, the lamination process has obvious advantages, firstly, the lamination type unit is more attached to the rectangular shell of the square battery, the space of four corners can be fully utilized, the winding type pole group is limited by the winding process, and the phenomenon of space waste exists at the four corners of the shell.

Because the coiling type unit is easy to distort after being used for a long time, the arcs on the two sides are coiled and broken to cause internal short circuit. The laminated pole group has better structural adaptability in the aspect of product performance, and the deformation and expansion probability of the battery is greatly reduced. Meanwhile, because the structure is simple, the safety of the battery is higher, so that the laminated battery is revolutionarily upgraded to the battery production process, and the product performance of the battery is greatly improved.

Because of the advantages of the laminated battery in the aspects of energy density, group assembly and the like, the capacity occupation ratio is continuously improved, but the laminated battery with a diaphragm with larger width pulls the laminated pressing knife leftwards and rightwards, and the tip of the pressing knife causes local deformation or corrugated wrinkle extension to the diaphragm.

In addition, partial wrinkles cannot be recovered after hot pressing, so that ion conduction is affected, and the risk of lithium precipitation is easily caused. Influence is caused to the life and safety of the battery cell, membrane folds in the pole group cannot be subjected to nondestructive testing, and the risk battery cell cannot be effectively eliminated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a battery is tucking tool mechanism for lamination to improve the surface quality of diaphragm or pole piece, reduce the fold of diaphragm or pole piece.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a die cutter mechanism for battery lamination for pressing a separator or a pole piece on a lamination table, the die cutter mechanism comprising: the mounting base station is arranged on one side of the lamination table in a guiding and moving mode; a top plate which can be driven to vertically move on the mounting base; and a knife pressing unit which comprises a base plate held on the top plate and can be horizontally driven, and a knife pressing fixed on the base plate, wherein the knife pressing unit is driven by the movement of the base plate to penetrate into the laminated diaphragm or pole piece.

Furthermore, the top plate is connected with the power output end of the first power device, and the base plate is connected with the power output end of the second power device.

Further, the first power device and the second power device adopt linear power output devices.

Further, the first power device and the second power device adopt cylinders.

Further, the power output end of the first power device is perpendicular to the power output end of the second power device.

Furthermore, the pressing knife is provided with a fixed section connected with the substrate and an extension section which extends along the fixed section and is suspended in the air, and the extension section is used for extending into the laminated diaphragm or pole piece to press the diaphragm or pole piece.

Further, the extension section is arranged along the moving direction of the substrate.

Compared with the prior art, the utility model discloses following advantage has:

battery lamination is with pressing sword mechanism, the vertical removal of roof can realize the height control of pressing the sword unit on the installation base station, and base plate horizontal migration is on the roof, then can make the deeper diaphragm or the pole piece of exploring into of pressing the sword in, the pressing the sword compresses tightly diaphragm or pole piece to the marginal portion that gets off at the effect of compressing tightly of pressing the sword and level diaphragm or pole piece improves the surface quality of diaphragm or pole piece, reduces the fold of diaphragm or pole piece, improves the effect that compresses tightly of diaphragm or pole piece.

In addition, the pressing knife is provided with a fixed section and an extension section, the fixed section is used for being connected and fixed with the substrate, the length of the extension section can be adjusted in an adaptive mode, and the extension section can penetrate into the diaphragm or the pole piece as far as possible on the basis that the substrate moves, so that the phenomenon that the front end of the pressing knife generates large pressure on the part of the diaphragm or the pole piece is avoided, and the condition that the diaphragm or the pole piece is wrinkled is improved.

Another object of the present invention is to provide a lamination device, comprising two said pressing knife mechanisms as described above, wherein the two said pressing knife mechanisms are arranged side by side; and the laminating table is arranged between the two pressing knife mechanisms.

Further, the laminating machine further comprises a guide unit, and the guide unit is used for driving the knife pressing mechanism to reciprocate along the length direction of the laminating table.

Furthermore, the guiding unit adopts a ball screw, one end of the ball screw is connected with a servo motor, and the servo motor rotates to form the movement of the cutter pressing mechanism.

Lamination equipment, through adopting two side by side as above the pressing tool mechanism, can improve the quality and the efficiency of lamination to there is better result of use.

Drawings

The accompanying drawings, which form a part of the present disclosure, are provided to further understand the present disclosure, and the exemplary embodiments and descriptions thereof are used to explain the present disclosure, wherein the related front and back, upper and lower, and other words are only used to represent relative positional relationships, which do not constitute an improper limitation of the present disclosure. In the drawings:

fig. 1 is a schematic overall structure diagram of a pressing knife mechanism for battery lamination according to a first embodiment of the present invention;

fig. 2 is a side view of a pressing knife mechanism for battery lamination according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a pressing knife according to a first embodiment of the present invention.

Description of reference numerals:

1. installing a base platform; 10. a top plate; 100. a first power unit; 11. a substrate; 110. a second power unit; 12. pressing a cutter; 120. a fixed section; 1200. mounting holes; 121. an extension section; 122. flush face.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that if terms indicating directions or positional relationships such as "up", "down", "inside", "outside", etc. appear, they are based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same order, but are to be construed as referring to the same order.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to a pressing cutter mechanism for battery lamination, which is used for pressing a diaphragm or a pole piece on a lamination table. In the overall structure, the knife pressing mechanism comprises an installation base platform 1, wherein the installation base platform 1 is arranged on one side of a lamination platform in a guiding and moving mode; the top plate 10 can be driven to vertically move on the mounting base 1; the knife pressing unit includes a base plate 11 held on the top plate 10 to be horizontally driven, and a knife pressing 12 fixed to the base plate 11, and the knife pressing 12 is caused to penetrate into the laminated diaphragm or pole piece by the movement of the base plate 11.

According to the structure, the top plate 10 vertically moves on the mounting base platform 1, height adjustment of the pressing knife unit can be achieved, the substrate 11 horizontally moves on the top plate 10, the pressing knife 12 can deeply penetrate into the diaphragm or the pole piece, the pressing knife 12 presses the diaphragm or the pole piece, the edge part of the diaphragm or the pole piece is flattened under the pressing effect of the pressing knife 12, the surface quality of the diaphragm or the pole piece is improved, wrinkles of the diaphragm or the pole piece are reduced, and the pressing effect of the diaphragm or the pole piece is improved.

Based on the above overall design, an exemplary structure of the battery lamination pressing blade mechanism of the present embodiment is shown in fig. 1 and 2, in which a mounting base 1 is used as a mounting base for a top plate 10 and a base plate 11, and a first power unit 100 is provided between the mounting base 1 and the top plate 10. Specifically, the first power device 100 is vertically arranged, and a power output end of the first power device 100 is connected with the top plate 10, so as to realize reciprocating movement of the knife pressing unit in the height direction, and thus the knife pressing unit can be inserted into different height directions of the diaphragm or the pole piece.

In order to realize the movement of the base plate 11, a second power device 110 is arranged between the base plate 11 and the top plate 10, a power output end of the second power device 110 is connected with the base plate 11, specifically, the second power device 110 is horizontally fixed on the top plate 10, and the second power device 110 can enable the base plate 11 to move in the horizontal direction so as to change the depth of the cutter pressing unit penetrating into the diaphragm or the pole piece.

In this embodiment, the first power device 100 and the second power device 110 adopt linear power output devices, and the first power device 100 and the second power device 110 both adopt cylinders, so that the entire structure of the cutter pressing mechanism is simple, and in addition, since the cutter pressing unit can move in the vertical or horizontal direction, the power output end of the first power device 100 is perpendicular to the power output end of the second power device 110.

Specifically, as shown in fig. 3, the pressing blade 12 has a fixed section 120 connected to the base plate 11, and an extended section 121 extending along the fixed section 120 and suspending therefrom, wherein the extended section 121 is used for penetrating into the stacked membranes or pole pieces to press the membranes or pole pieces. The extension 121 is disposed along the moving direction of the substrate 11. It should be noted that the fixing segment 120 has a plurality of mounting holes 1200, and it is understood that a screw hole corresponding to the plurality of mounting holes 1200 is formed in the top plate 10, and the fixing segment is screwed into the mounting hole 1200 and the screw hole by using a bolt to fix the pressing blade 12.

In addition, in order to improve the compression effect on the diaphragm or the pole piece, the extension section 121 is provided with a flush surface 122 which can be tightly attached to the diaphragm or the pole piece and is positioned at the bottom of the extension section 121. When the second power device 110 drives the substrate 11 to move, the extension section 121 of the pressing knife 12 can extend into the diaphragm or the pole piece, and at the moment, the first power device 100 moves downwards to enable the pressing knife 12 to press the diaphragm or the pole piece, and the diaphragm or the pole piece can be tensioned under the pressing action of the pressing knife 12, so that the condition that the edge of the diaphragm or the pole piece is wrinkled is improved. On the basis, the length of the extension segment 121 can be adaptively changed according to actual use conditions.

The pressing knife mechanism for the battery lamination can enable the pressing knife 12 to deeply penetrate into the diaphragm or the pole piece, the pressing knife 12 compresses the diaphragm or the pole piece, the edge part of the diaphragm or the pole piece is flattened under the compression effect of the pressing knife 12, the folds of the diaphragm or the pole piece are reduced, the compression effect of the diaphragm or the pole piece is improved, meanwhile, the deviation of the pole piece can be effectively prevented, the alignment degree of the lamination can be improved, the quality and the efficiency of the lamination can be improved, and a better using effect is achieved.

Example two

The embodiment relates to lamination equipment, which comprises two pressing cutter mechanisms according to the first embodiment, wherein the two pressing cutter mechanisms are arranged side by side, and a lamination table is arranged between the two pressing cutter mechanisms. It is worth mentioning that the two pressing knife mechanisms are positioned at two sides of the lamination table to alternately press and hold the diaphragm or the pole piece on the lamination table, that is, each pressing knife mechanism is respectively arranged along two sides of the diaphragm which is flatly laid on the path of the lamination table, and the lamination operation is carried out by alternately pressing and holding the diaphragm or the pole piece on the lamination table by the two pressing knife mechanisms.

In addition, the lamination apparatus of the present embodiment further includes a guide unit for driving the blade pressing mechanism to reciprocate in a length direction of the lamination stage. Specifically, the guide unit uses a ball screw, one end of the ball screw is connected with a servo motor, and the movement of the knife pressing mechanism is formed by the rotation of the servo motor. The ball screw is horizontally arranged on two sides of a lamination table in the lamination device, and the mounting base table 1 is fixed on a sliding table of the ball screw, so that the cutter pressing mechanism moves along the length direction of the lamination table.

In the lamination device according to the embodiment, during lamination, the pressing knife 12 on one side of the lamination table presses the membrane, the pressing knife 12 on the other side pulls the membrane to move to the same side to a target position, and then the second power device 110 drives the pressing knife 12 to be drawn out of the membrane and move away from the membrane in cooperation with the guide unit. Then the first power device 100 drives the pressing knife 12 to move upwards, and the second power device 110 and the guide unit are matched to penetrate into the membrane, the pressing knife 12 descends to press the membrane, the pressing knife 12 on the other side pulls the membrane to move to the same side to a target position, and the lamination is achieved in a reciprocating mode. According to the lamination device, the pressing cutter mechanism in the first embodiment is adopted, so that the condition that the lamination is folded can be reduced, the alignment degree of the lamination is effectively improved, and the quality and the efficiency of the lamination can be improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery is die cutter mechanism for lamination for compressing tightly diaphragm or pole piece on the lamination platform, characterized in that this die cutter mechanism includes:

the mounting base (1) is arranged on one side of the lamination table in a guiding mode;

a top plate (10) which can be driven to vertically move on the mounting base (1);

and a knife pressing unit which comprises a base plate (11) held on the top plate (10) and capable of being horizontally driven, and a knife pressing (12) fixed on the base plate (11), wherein the knife pressing (12) is inserted into the laminated diaphragm or pole piece due to the movement of the base plate (11).

2. The battery pack pressing blade mechanism according to claim 1, wherein:

the top plate (10) is connected with the power output end of the first power device (100), and the base plate (11) is connected with the power output end of the second power device (110).

3. The battery pack pressing blade mechanism according to claim 2, wherein:

the first power device (100) and the second power device (110) adopt linear power output devices.

4. The battery pack pressing blade mechanism according to claim 3, wherein:

the first power device (100) and the second power device (110) adopt cylinders.

5. The battery pack pressing blade mechanism according to claim 4, wherein:

the power output end of the first power device (100) is vertical to the power output end of the second power device (110).

6. The blade pressing mechanism for battery lamination according to claim 1, wherein:

the pressing knife (12) is provided with a fixed section (120) connected with the base plate (11), and an extension section (121) extending along the fixed section (120) and suspending in the air, wherein the extension section (121) is used for penetrating into the stacked diaphragms or pole pieces to press the diaphragms or the pole pieces.

7. The battery pack pressing blade mechanism according to claim 6, wherein:

the extension (121) is disposed along a moving direction of the base plate (11).

8. A lamination apparatus, comprising: two of the blade pressing mechanisms of any one of claims 1-7, the two blade pressing mechanisms being disposed side by side;

and the laminating table is arranged between the two pressing knife mechanisms.

9. The lamination apparatus according to claim 8, wherein:

the laminating table further comprises a guide unit, and the guide unit is used for driving the cutter pressing mechanism to reciprocate along the length direction of the laminating table.

10. The lamination apparatus according to claim 9, wherein:

the guide unit adopts a ball screw, one end of the ball screw is connected with a servo motor, and the servo motor rotates to form the movement of the knife pressing mechanism.