CN215680718U

CN215680718U - Coating gasket with smooth coating

Info

Publication number: CN215680718U
Application number: CN202121087791.8U
Authority: CN
Inventors: 梁鸿达; 黄江涛; 李广盛; 孔沛良; 林友送; 杨文科; 陈杰; 杨山; 项海标
Original assignee: Huizhou Liwinon Energy Technology Co Ltd
Current assignee: Huizhou Liwinon Energy Technology Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-01-28
Anticipated expiration: 2031-05-20

Abstract

The utility model belongs to the technical field of battery manufacturing, and particularly relates to a coating gasket with smooth coating. The utility model not only can change the flow direction of the slurry, improve the flatness and consistency of coating, improve the consistency of the capacity of the edge-winding battery core, but also effectively reduce the phenomenon of bad wavy edges and reduce the manufacturing cost.

Description

Coating gasket with smooth coating

Technical Field

The utility model belongs to the technical field of battery manufacturing, and particularly relates to a coating gasket with smooth coating.

Background

The production of the pole piece of the lithium ion battery comprises the steps of homogenizing, coating, rolling, slitting and the like, wherein the quality of a coating process is critical, and the consistency and the safety performance of the battery capacity can be directly determined. In the process of pole piece coating, the coating smoothness needs to be strictly controlled.

The inventor finds that in the coating process of the existing battery pole piece, the existing gasket structure is difficult to ensure the transverse consistency when slurry is sprayed, so that the edge thinning area of the pole piece produced by the existing gasket structure is large, meanwhile, because the edge thickness of the pole piece is influenced by the existing gasket structure, the existing gasket structure not only causes the large thickness difference of the cut pole piece at the edge position, but also easily generates wavy edges, and also influences the capacity of a formed battery core, so that the existing gasket structure is difficult to obtain the pole piece with uniform edge thickness and smooth coating. Therefore, a need exists to provide a novel coating pad to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the coating gasket is stable and reliable in structure, not only can change the flow direction of slurry, improve coating flatness and consistency, improve the consistency of the capacity of the edge winding battery core, but also effectively reduce the phenomenon of bad wave edges and reduce the manufacturing cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a coating gasket that coating is leveled, includes supporting part and water conservancy diversion portion, two water conservancy diversion portion symmetry set up in the supporting part, two the water conservancy diversion end of water conservancy diversion portion sets up relatively, two the top and the bottom of water conservancy diversion end all are provided with the fillet, the top with be provided with the water conservancy diversion hem between the bottom, wherein, the fillet on top the fillet of bottom with the water conservancy diversion hem has all ensured that the limit of pole piece is rolled up and the volume difference of middle book is little to effectively improve and promoted the capacity of the back edge of pole piece.

Furthermore, the flow guide folding edge comprises a first folding edge and a second folding edge, the first folding edge is connected to the top end and the second folding edge respectively, the second folding edge is connected to the bottom end, and the first folding edge and the second folding edge are used for changing the flow direction of slurry and ensuring the transverse consistency during slurry spraying, so that the edge thickness of the pole piece is effectively improved.

Furthermore, the included angle of the first folding edge and the second folding edge is A, A is more than or equal to 130 degrees and less than or equal to 175 degrees, and when the included angle of the first folding edge and the second folding edge is an obtuse angle, the edge thinning area of the pole piece can be effectively thickened, so that the coating flatness and consistency are improved, and the phenomenon of bad wave edges is effectively reduced.

Further, the length of the first folded edge is L1, the length of the second folded edge is L2, and the relation is satisfied: L2/L1 is more than or equal to 0.5 and less than or equal to 0.7.

Further, the supporting part comprises a first supporting block and a second supporting block which are integrally formed, the flow guide part is arranged on the second supporting block, the two second supporting blocks are symmetrically arranged on the first supporting block, and the first supporting block, the second supporting block and the flow guide part are integrally formed.

Furthermore, the second supporting block is perpendicular to the first supporting block, and the flow guide part is perpendicular to the second supporting block, so that the stable and firm structure of the coating gasket and the stable and controllable coating process of the pole piece are guaranteed.

Furthermore, the first supporting block and the second supporting block are provided with a plurality of positioning holes, and the plurality of positioning holes are used for ensuring the stable installation of the coating gasket.

Further, the length of the first supporting block is K1, the length of the second supporting block is K2, and the following relation is satisfied: K2/K1 is more than or equal to 0.12 and less than or equal to 0.2.

Further, the distance between the top ends of the two flow guide parts is K3, and the relation is satisfied: K3/K1 is more than or equal to 0.65 and less than or equal to 0.8.

Furthermore, the thickness of the supporting part and the thickness of the flow guide part are both 0.75 mm-0.85 mm, so that the coating of the coating gasket is uniform and efficient.

The utility model has the beneficial effects that: the pole piece coating device comprises a supporting part and two flow guide parts, wherein the two flow guide parts are symmetrically arranged on the supporting part, the flow guide ends of the two flow guide parts are oppositely arranged, round corners are arranged at the top ends and the bottom ends of the two flow guide ends, a flow guide folding edge is arranged between the top end of the flow guide end and the bottom end of the flow guide end, and under the action of simultaneously conducting flow guide adjustment on the flow of slurry by the flow guide folding edge of a coating gasket and at least four oppositely arranged round corners, the phenomenon that the edge of a pole piece is uneven can be effectively reduced, so that the edge thickness of the pole piece is uniformly coated, the gasket can play a thickening effect on the edge thickness of a coating film, the coating flatness of the pole piece is high, and the capacity of a battery cell with better consistency can be ensured.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion M in fig. 1.

Fig. 3 is a schematic size view of the flow guide, the first flange and the second flange of the present invention.

FIG. 4 is a schematic diagram showing the top end spacing of the flow guide portion, the dimensions of the first support block and the second support block according to the present invention.

Wherein: 1-a support part; 2-a flow guide part; 3-a flow guide end; 4-flow guiding and edge folding; 11-a first support block; 12-a second support block; 13-positioning holes; 31-top end; 32-bottom end; 41-first folding edge; 42-second hem; a-the included angle of the first folded edge and the second folded edge; l1 — length of first flap; l2 — length of second flap; l3-height of flow guide; k1 — length of first support block; k2-length of second support block; k3 — the distance between the tips of the two flow guides.

Detailed Description

As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail with reference to the accompanying drawings 1 to 4 and specific examples, but the present invention is not limited thereto.

Example 1

A coating gasket with smooth coating is disclosed, as shown in figures 1-2, comprising a supporting part 1 and flow guiding parts 2, wherein the two flow guiding parts 2 are symmetrically arranged on the supporting part 1, the flow guiding ends 3 of the two flow guiding parts 2 are oppositely arranged, the top ends 31 and the bottom ends 32 of the two flow guiding ends 3 are both provided with round corners, a flow guiding folding edge 4 is arranged between the top end 31 of the flow guiding end 3 and the bottom end 32 of the flow guiding end 3, wherein the round corner size radius of the top end 31 is 1.5 mm-2.5 mm, the round corner size radius of the bottom end 32 is 0.5 mm-1.3 mm, the flow guiding folding edge 4 is in a bending shape, when coating slurry flows from the two flow guiding parts 2 to the flow guiding ends 3, the round corner of the bottom end 32 of the flow guiding end 3, the round corner of the flow guiding folding edge 4 and the round corner of the top end 31 of the flow guiding end 3 can simultaneously guide and adjust the flow of the slurry to flow guiding towards the middle backflow edge, thereby effectively reducing the phenomenon of the edge of a pole piece, the edge thickness and the middle thickness of the pole piece are uniformly coated.

Specifically, water conservancy diversion hem 4 includes first hem 41 and second hem 42, and first hem 41 is connected respectively in top 31 and second hem 42, and second hem 42 is connected in bottom 32, and thick liquids follow second hem 42 and flow to first hem 41, and first hem 41 and second hem 42 change thick liquids flow direction simultaneously, and horizontal uniformity when can guaranteeing the thick liquids spraying has promoted the marginal thickness of pole piece effectively.

Preferably, the included angle of the first and

second flaps

41 and 42 is A, 130 DEG.ltoreq.A.ltoreq.175 DEG, and the included angle of the first and

second flaps

41 and 42 may be 140 DEG, 150 DEG or 160 DEG to ensure efficient edge return of the coating slurry to the center.

In the guide flange 4, as shown in fig. 3, the length of the first flange 41 is L1, the length of the second flange 42 is L2, and the height of the guide part 2 is L3, which satisfy the relationship: L2/L1 is more than or equal to 0.5 and less than or equal to 0.7; L2/L3 is more than or equal to 0.4 and less than or equal to 0.5. The length of the first folded edge 41 is greater than that of the second folded edge 42, so that the process that the coating slurry flows back to the middle of the edge can be more stable and controllable.

In the coating gasket, supporting part 1 includes integrated into one piece's first supporting shoe 11 and second supporting shoe 12, and water conservancy diversion portion 2 sets up in second supporting shoe 12, and two second supporting shoes 12 symmetries set up in first supporting shoe 11, and first supporting shoe 11, two second supporting shoes 12 and two water conservancy diversion portion 2 seamless connection, integrated into one piece can ensure that coating gasket has stronger structural stability to coating gasket's life has been prolonged.

In the structural design of gasket, second supporting shoe 12 is perpendicular to first supporting shoe 11, and water conservancy diversion portion 2 is perpendicular to second supporting shoe 12, and water conservancy diversion portion 2 and first supporting shoe 11 are parallel to each other to horizontal uniformity when can guaranteeing the thick liquids spraying.

In order to improve the positioning stability of the coating pad, the first supporting block 11 and the second supporting block 12 are both provided with a plurality of positioning holes 13, and the plurality of positioning holes 13 are uniformly distributed on the first supporting block 11 and the second supporting block 12.

In the coating pad, as shown in fig. 4, the length of the first supporting block 11 is K1, the length of the second supporting block 12 is K2, and the distance between the top ends 31 of the two flow guides 2 is K3, which satisfies the relation: K2/K1 is more than or equal to 0.12 and less than or equal to 0.2; K3/K1 is more than or equal to 0.65 and less than or equal to 0.8.

Preferably, the thickness of the support part 1 and the thickness of the flow guide part 2 are both 0.75 mm-0.85 mm, and the size of the coating gasket is thin, so that the high efficiency of the coating process and the high uniformity of the coating effect can be ensured.

Example 2

The difference between this embodiment and embodiment 1 is that the length K2 of the second supporting block 12 and the length K1 of the first supporting block 11 satisfy the following relation: K2/K1 is more than or equal to 0.3 and less than or equal to 0.8, so that the coating gasket can meet the coating requirements of various pole pieces, and the coating universality is effectively improved.

Other structures of this embodiment are the same as those of embodiment 1, and are not described herein again.

Obviously, the utility model not only can change the flow direction of the slurry, improve the coating flatness and consistency, improve the consistency of the capacity of the edge-winding battery cell, but also effectively reduce the phenomenon of bad wavy edges and reduce the manufacturing cost.

Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A coated flat gasket characterized by: including supporting part (1) and water conservancy diversion portion (2), two water conservancy diversion portion (2) symmetry set up in supporting part (1), two water conservancy diversion end (3) of water conservancy diversion portion (2) set up relatively, two top (31) and bottom (32) of water conservancy diversion end (3) all are provided with the fillet, top (31) with be provided with water conservancy diversion hem (4) between bottom (32).

2. The coated flat coated gasket of claim 1 wherein: the flow guide folding edge (4) comprises a first folding edge (41) and a second folding edge (42), the first folding edge (41) is connected to the top end (31) and the second folding edge (42) respectively, and the second folding edge (42) is connected to the bottom end (32).

3. The coated flat coated gasket of claim 2 wherein: the included angle between the first folded edge (41) and the second folded edge (42) is A, and A is more than or equal to 130 degrees and less than or equal to 175 degrees.

4. The coated flat coated gasket of claim 2 wherein: the length of the first folding edge (41) is L1, the length of the second folding edge (42) is L2, and the relation is satisfied: L2/L1 is more than or equal to 0.5 and less than or equal to 0.7.

5. The coated flat coated gasket of claim 1 wherein: the supporting part (1) comprises a first supporting block (11) and a second supporting block (12) which are integrally formed, the flow guide part (2) is arranged on the second supporting block (12), and the two second supporting blocks (12) are symmetrically arranged on the first supporting block (11).

6. The coated flat coated gasket of claim 5 wherein: the second supporting block (12) is perpendicular to the first supporting block (11), and the flow guide portion (2) is perpendicular to the second supporting block (12).

7. The coated flat coated gasket of any of claims 5 through 6 wherein: the first supporting block (11) and the second supporting block (12) are provided with a plurality of positioning holes (13).

8. The coated flat coated gasket of any of claims 5 through 6 wherein: the length of the first supporting block (11) is K1, the length of the second supporting block (12) is K2, and the relation is satisfied: K2/K1 is more than or equal to 0.12 and less than or equal to 0.2.

9. The coated flat coated gasket of claim 8 wherein: the distance between the top ends (31) of the two flow guide parts (2) is K3, and the relation formula is satisfied: K3/K1 is more than or equal to 0.65 and less than or equal to 0.8.

10. The coated flat coated gasket of claim 1 wherein: the thickness of the supporting part (1) and the thickness of the flow guide part (2) are both 0.75 mm-0.85 mm.