US-20260124635-A1 - COATING DIE AND ELECTRODE PLATE COATING DEVICE

US20260124635A1US 20260124635 A1US20260124635 A1US 20260124635A1US-20260124635-A1

Abstract

A coating die and an electrode plate coating device, where the coating die is provided with an inlet, a first distribution cavity, a plurality of distribution channels, and a plurality of coating outlets is described. The plurality of coating outlets are spaced apart along a first direction. Each distribution channel is provided with an inlet port and an outlet port at two respective ends thereof. The inlet port is in communication with the inlet, each outlet port is oriented toward a corresponding coating outlet, and cross-sectional areas of the inlet ports of all of the plurality of distribution channels are equal. The cross-sectional areas of all the inlet ports of the distribution channels are equal and the outlet port of each distribution channel corresponds to a respective coating outlet, the slurry can be evenly distributed and guided to the plurality of coating outlets under the action of the distribution channels.

Inventors

Bingyang ZHAN
Jingdong Zhang

Assignees

CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Dates

Publication Date: 20260507
Application Date: 20260105
Priority Date: 20230710

Claims (13)

1 . A coating die, wherein the coating die is provided with an inlet, a first distribution cavity, a plurality of distribution channels, and a plurality of coating outlets, the plurality of coating outlets being spaced apart along a first direction; each distribution channel is provided with an inlet port and an outlet port at two respective ends thereof, the inlet port being in communication with the inlet and each outlet port being oriented toward a corresponding coating outlet and in communication with the corresponding coating outlet through the first distribution cavity; and cross-sectional areas of all the inlet ports of the plurality of distribution channels are equal.
2 . The coating die according to claim 1 , wherein the distribution channel comprises at least two sub-distribution channels, cross-sectional areas of all of the at least two sub-distribution channels at the inlet port being equal.
3 . The coating die according to claim 2 , wherein the coating die comprises a first die, a second die, and a plurality of first distribution plates, the first die being provided with a flow cavity in communication with the inlet, the second die covering the flow cavity, and the plurality of first distribution plates being spaced apart in the flow cavity to form the distribution channels in communication with the coating outlets.
4 . The coating die according to claim 3 , wherein the coating die further comprises a second distribution plate, the second distribution plate being disposed in the flow cavity and at least one second distribution plate being disposed between two adjacent first distribution plates to divide the distribution channel into at least two sub-distribution channels.
5 . The coating die according to claim 3 , wherein the flow cavity comprises a first chamber and a feed cavity in communication with the first chamber, the inlet being located at an end of the feed cavity away from the first chamber, the first distribution plate extending from the feed cavity into the first chamber, the inlet port being located in the feed cavity, and the outlet port being located in the first chamber.
6 . The coating die according to claim 5 , wherein the coating die further comprises a pressure bar, the pressure bar being connected to the second die and disposed in the first chamber, the pressure bar being spaced apart from at least a portion of an inner wall of the first chamber, a portion of the first distribution plate extending into the first chamber being disposed between the pressure bar and the inner wall of the first chamber, a portion of a gap between the pressure bar and the inner wall of the first chamber forming the first distribution cavity in communication with the plurality of coating outlets, and the first distribution cavity being in communication with the outlet ports of the distribution channels.
7 . The coating die according to claim 5 , wherein the first die is provided with a second chamber, the second chamber being spaced apart from the first chamber, the second die covering the second chamber to form a second distribution cavity, and the second distribution cavity being in communication with the plurality of coating outlets.
8 . The coating die according to claim 3 , wherein the coating die further comprises a first adjustment rod and a second adjustment rod, the first adjustment rod being connected to the first die, the second adjustment rod being connected to the second die, and the first adjustment rod and the second adjustment rod being configured to adjust opening sizes of the coating outlets.
9 . The coating die according to claim 6 , wherein the coating die further comprises a gasket, the gasket being provided with a plurality of notches spaced apart along the first direction, the gasket being sandwiched between the first die and the second die, and all of the plurality of notches being in communication with the first distribution cavity to form the coating outlets.
10 . The coating die according to claim 6 , wherein the first chamber and the pressure bar both extend along the first direction.
11 . The coating die according to claim 8 , wherein a plurality of first adjustment rods are provided, the plurality of first adjustment rods being spaced apart along the first direction; and a plurality of second adjustment rods are provided, the plurality of second adjustment rods being spaced apart along the first direction.
12 . The coating die according to claim 9 , wherein the coating die further comprises a connector, the gasket being provided with a through-hole and the pressure bar being fixed to the second die by the connector passing through the through-hole.
13 . An electrode plate coating device, comprising the coating die according to claim 1 , wherein the coating die is configured to coat slurry onto a surface of an electrode plate.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation of International application PCT/CN2023/135561 filed on Nov. 30, 2023 that claims priority to Chinese Patent Application No. 202321793656.4, filed on Jul. 10, 2023. The content of these applications is incorporated herein by reference in its entirety. TECHNICAL FIELD The present application relates to the technical field of battery production, and more particularly, to a coating die and an electrode plate coating device. BACKGROUND Batteries have advantages such as high specific energy and high power density, and are widely used in electronic devices, such as mobile phones, laptops, electric bicycles, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, and the like. The coating process, as an important process in battery production, has a significant impact on battery quality. Improving the uniformity of slurry coating in the coating process has been a key research direction for those skilled in the art. SUMMARY In view of the above problems, the present application provides a coating die and an electrode plate coating device, where the coating die can improve the uniformity of slurry coating in the coating process. According to a first aspect, some embodiments of the present application provide a coating die, where the coating die is provided with an inlet, a first distribution cavity, a plurality of distribution channels, and a plurality of coating outlets, the plurality of coating outlets being spaced apart along a first direction; each distribution channel is provided with an inlet port and an outlet port at two respective ends thereof, the inlet port being in communication with the inlet and each outlet port being oriented toward a corresponding coating outlet and in communication with the corresponding coating outlet through the first distribution cavity; and cross-sectional areas of all the inlet ports of the plurality of distribution channels are equal. Since the cross-sectional areas of the inlet ports of all the distribution channels are equal and the outlet port of each distribution channel corresponds to a respective coating outlet, the slurry can be evenly distributed and guided to the plurality of coating outlets under the action of the distribution channels, reducing the problem of uneven slurry amounts obtained by the coating outlets during free flow, which facilitates improving the consistency of discharge from the plurality of coating outlets and enhances the uniformity of slurry coating in the coating process. According to the coating die provided in some embodiments of the present application, the distribution channel includes at least two sub-distribution channels, where the cross-sectional areas of all of the at least two sub-distribution channels at the inlet port are equal, such that the slurry is less likely to disperse during flow from the outlet port to the coating outlet, which facilitates improving the correspondence between the outlet port of each distribution channel and the coating outlet, so that the slurry obtained by the coating outlet comes as much as possible from the corresponding distribution channel. According to the coating die provided in some embodiments of the present application, the coating die includes a first die, a second die, and a plurality of first distribution plates, the first die being provided with a flow cavity in communication with the inlet, the second die covering the flow cavity, and the plurality of first distribution plates being spaced apart in the flow cavity to form the distribution channels in communication with the coating outlets. According to the coating die provided in some embodiments of the present application, the coating die further includes a second distribution plate, the second distribution plate being disposed in the flow cavity, and at least one second distribution plate disposed between two adjacent first distribution plates to divide the distribution channel into at least two sub-distribution channels. According to the coating die provided in some embodiments of the present application, the flow cavity includes a first chamber and a feed cavity in communication with the first chamber, the inlet being located at an end of the feed cavity away from the first chamber, the first distribution plate extending from the feed cavity into the first chamber, the inlet port being located in the feed cavity, and the outlet port being located in the first chamber, such that a portion of the first distribution plate is disposed in the feed cavity and another portion is disposed in the first chamber, the first distribution plate extending through the feed cavity and the first chamber, resulting in a longer path for the first distribution plate to act on the slurry, providing a stronger guiding effect. According to the coating die provided in some embodiments of the present appl