KR-20260065924-A - Coating die and coating device

KR20260065924AKR 20260065924 AKR20260065924 AKR 20260065924AKR-20260065924-A

Abstract

The present application provides a coating die and a coating device. The coating die comprises a die body (10) and a pressure regulating member (20). The die body is provided with opposing material inlet (K1) and material outlet (K2). The die body comprises a first receiving cavity (11) and a second receiving cavity (12) that are in communication with each other. The first receiving cavity is located on one side near the material inlet of the second receiving cavity along a first direction (X) and is in communication with the material inlet, and the second receiving cavity is in communication with the material outlet. The pressure regulating member is received within the second receiving cavity and the pressure regulating member comprises a plurality of pressure regulating plates (21). The plurality of pressure regulating plates are spaced apart in a second direction (Y) to form a pressure control channel (22). The coating die and the coating device can improve the coating uniformity of the slurry in a coating process.

Inventors

잔 빙양
장 징동

Assignees

컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드

Dates

Publication Date: 20260511
Application Date: 20240314
Priority Date: 20240110

Claims (12)

A die body comprising a first receiving cavity and a second receiving cavity that are in communication with each other, wherein the first receiving cavity is located on one side near the material inlet of the second receiving cavity along a first direction and is in communication with the material inlet, and the second receiving cavity is in communication with the material outlet; A coating die comprising: a pressure regulating member that is accommodated in the second receiving cavity and includes a plurality of pressure regulating plates, wherein the plurality of pressure regulating plates are spaced apart from each other in a second direction to form a pressure control channel, and the first direction intersects the second direction.
In paragraph 1, The second receiving cavity comprises a first receiving portion installed spaced apart from the first receiving cavity in the first direction, and a channel structure communicating the first receiving portion and the first receiving cavity; The pressure regulating member is a coating die accommodated within the channel structure.
In paragraph 2, The pressure regulating member comprises a first side installed adjacent to the first receiving portion, the first receiving portion having a first inner wall relatively separated from the pressure regulating member in the first direction, and the first side is adjacent to and smoothly connected to the first inner wall, forming a coating die.
In any one of paragraphs 1 through 3, The above die body includes a first die and a second die, and the first die includes the first receiving cavity and the second receiving cavity; The coating die further comprises a pressing strip connected to the second die, wherein the pressing strip is received within the first receiving cavity and installed spaced apart from at least a portion of the inner wall of the first receiving cavity.
In paragraph 4, A coating die further comprising a gasket interposed between the first die and the second die, wherein the gasket has a notch installed at the edge of the first direction, and the notch communicates with the pressure control channel to form the material discharge port.
In paragraph 5, The pressure regulating member comprises a plurality of first regions and a plurality of second regions alternately arranged in the second direction, and a plurality of pressure regulating plates are installed within the first region, and the pressure regulating member further comprises a liquid blocking plate installed within the second region; A plurality of the above notches are spaced apart in the second direction, and the gasket includes a stopper located between adjacent notches, and the stopper is installed to cover the liquid blocking plate.
In paragraph 6, The first die and the second die are installed facing each other in a third direction, and the first direction, the second direction, and the third direction intersect in pairs; The pressure regulating member further includes a main body, and the pressure regulating plate and the liquid blocking plate are coating dies located on the same side of the main body along the third direction.
In paragraph 6 or 7, The first die and the second die are installed facing each other in a third direction, and the first direction, the second direction, and the third direction intersect in pairs; A coating die in which the size of the pressure regulating plate in the third direction is larger than the size of the liquid blocking plate in the third direction.
In any one of paragraphs 1 through 8, The die body above has a first edge and a second edge facing each other in the second direction, and in the direction where the material inlet points to the first edge, the gap between adjacent pressure regulating plates shows a trend of increasing; and/or, A coating die in which the gap between adjacent pressure regulating plates shows a trend of increasing as the material input port points toward the second edge.
In any one of paragraphs 1 through 9, The above die body includes a first die and a second die, and the coating die further includes a first adjusting member connected to the first die, and the first adjusting member adjusts the opening size of the material discharge port; and/or, The coating die further includes a second adjusting member connected to the second die, and the second adjusting member adjusts the opening size of the material discharge port of the coating die.
In Paragraph 10, It further comprises a plurality of the first adjusting members, wherein the plurality of the first adjusting members are installed side by side in the second direction, and the number of pressure adjusting plates is greater than the number of the first adjusting members; and/or, The coating die further comprises a plurality of the second adjustment members, wherein the plurality of the second adjustment members are installed side by side in the second direction, and the number of pressure adjustment plates is greater than the number of the second adjustment members.
A pole coating apparatus comprising a coating die according to any one of claims 1 to 11 for coating a slurry on the surface of a pole.

Description

Coating die and coating device [Cross-reference of related applications] This application claims priority to Chinese patent application 202420061895.9, filed on January 10, 2024, with the title of the invention “Coating die and coating device,” all contents of said application incorporated herein by reference. [Technology Field] This application relates to the field of battery technology, and in particular to coating dies and coating devices. Batteries have the advantages of high specific energy and high power density, and are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. The coating process is an important process in the battery production process and has a significant impact on the quality of the battery. Improving the coating uniformity of the slurry in the coating process has been an important research direction for those with ordinary knowledge in this technical field. Taking the above problems into account, the present application can improve the uniformity of the coating by providing a coating die and a coating device. In one embodiment, an embodiment of the present application provides a coating die comprising a die body and a pressure regulating member, wherein the die body is provided with opposing material inlet and material outlet, and the die body comprises a first receiving cavity and a second receiving cavity communicating with each other, wherein the first receiving cavity is located on one side near the material inlet of the second receiving cavity along a first direction and communicates with the material inlet, and the second receiving cavity communicates with the material outlet. The pressure regulating member is received within the second receiving cavity, and the pressure regulating member comprises a plurality of pressure regulating plates, wherein the plurality of pressure regulating plates are spaced apart in a second direction to form a pressure control flow path, and the first direction intersects the second direction. In the above solution, by adding a pressure regulating member within the coating die and controlling the slurry flow direction and flow rate pressure through the pressure control channel formed in the pressure regulating member, it is advantageous to improve the uniformity of the slurry at different material discharge ports, thereby improving the coating uniformity of the slurry in the coating process. In addition, the pressure regulating member has a simple structure and is easy to process, so by appropriately adjusting the spacing between different pressure regulating plates in the pressure regulating member according to different actual demands, different pressure regulating members (20) with different sizes of pressure control channels can be formed. When applied in practice, the pressure regulating member can be replaced according to demand to achieve the effect of uniform coating, thus having strong practicality. In some embodiments, the second receiving cavity includes a first receiving portion installed spaced apart from the first receiving cavity in a first direction, and a channel structure communicating the first receiving portion and the first receiving cavity, and a pressure regulating member is received within the channel structure. In the above solution, since the pressure regulating member is accommodated within a channel structure, compared to a solution where the pressure regulating member is accommodated in a first receiving portion, this design causes the pressure regulating member to be closer to the first receiving cavity, and the slurry discharged from the first receiving cavity first enters the pressure control channel in the pressure regulating member, then undergoes flow control processing in the pressure control channel, and is transferred back into the first receiving portion. The slurry discharged from these different pressure control channels is collected in the first receiving portion and is finally spray-coated onto the electrode. By ensuring that the slurry is coated at every location of the electrode coating area, a complete coating of the electrode is achieved, and a uniform coating effect is obtained. In some embodiments, the pressure regulating member includes a first side adjacent to a first receiving portion, the first receiving portion has a first inner wall relatively separated from the pressure regulating member in a first direction, and the first side is adjacent to and smoothly connected to the first inner wall. In the above solution, by installing the first side and the first inner wall adjacent to each other, the first side and the first inner wall can be formed to surround and form a receiving space corresponding to the first receiving portion. Furthermore, the embodiment of the present application can also improve the reliability of the combination between the two by