CN-122025555-A - Method for manufacturing electrode plate and electrode assembly including the same

Abstract

A method for manufacturing an electrode plate includes placing a first active material layer on a first side of a substrate, drying the first active material layer placed on the first side of the substrate, placing a first ceramic coating on the first active material layer, and placing a second active material layer on a second side of the substrate opposite the first side.

Inventors

• LI YOUZHEN
• Ding Xianji

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260512

Application Date

20251103

Priority Date

20241112

Claims (20)

1. 1. A method for manufacturing an electrode plate, comprising: Placing a first active material layer on a first side of a substrate; Drying the first active material layer placed on the first side of the substrate; Placing a first ceramic coating layer on the first active material layer, and A second active material layer is disposed on a second side of the substrate opposite the first side.
2. 2. The method of claim 1, wherein the placing of the first ceramic coating and the placing of the second active material layer are performed concurrently.
3. 3. The method of claim 1, further comprising concurrently drying the first ceramic coating and the second active material layer.
4. 4. A method according to claim 3, wherein the first active material layer, the second active material layer and the first ceramic coating layer are dried by the same drying oven.
5. 5. The method of claim 1, wherein the first ceramic coating comprises a film.
6. 6. The method of claim 1, wherein the thickness of the first ceramic coating is in the range of 2-4 μιη.
7. 7. The method of claim 1, wherein the first ceramic coating is placed using gravure coating or spray coating.
8. 8. The method of claim 1, further comprising extruding the substrate with the first active material layer, the second active material layer, and the first ceramic coating disposed thereon.
9. 9. The method of claim 8, further comprising cutting the extruded substrate.
10. 10. The method of any one of claims 1 to 9, further comprising placing a second ceramic coating on the second active material layer.
11. 11. An electrode assembly, comprising: A first electrode plate; A second electrode plate having a polarity different from the polarity of the first electrode plate, and A diaphragm disposed between the first electrode plate and the second electrode plate, Wherein the first electrode plate comprises: The substrate is provided with a plurality of grooves, A first active material layer on a first side of the substrate, A second active material layer on a second side of the substrate opposite the first side, and A first ceramic coating on the first active material layer.
12. 12. The electrode assembly of claim 11, wherein the first electrode plate, the second electrode plate, and the separator are wound together and the first side of the substrate having the first ceramic coating disposed thereon faces a jellyroll direction.
13. 13. The electrode assembly of claim 12, wherein a total composition density of the first active material layer is different than a total composition density of the second active material layer.
14. 14. The electrode assembly of claim 13, wherein the total composition density of the first active material layer is less than the total composition density of the second active material layer.
15. 15. The electrode assembly of claim 11, wherein the separator comprises a polyethylene PE material.
16. 16. The electrode assembly of claim 11, wherein a thickness of the first ceramic coating is determined based on a thickness of the separator.
17. 17. The electrode assembly of claim 11, wherein the first ceramic coating comprises a thin film.
18. 18. The electrode assembly of claim 11, wherein the first electrode plate is a dry electrode plate.
19. 19. The electrode assembly of any one of claims 11 to 18, wherein the first electrode plate further comprises a second ceramic coating on the second active material layer.
20. 20. The electrode assembly of any one of claims 11 to 18, wherein the first ceramic coating comprises a ceramic powder and a binder.

Description

Method for manufacturing electrode plate and electrode assembly including the same Technical Field Aspects of embodiments of the present disclosure relate to a method for manufacturing an electrode plate and an electrode assembly including the electrode plate. Background Unlike primary batteries, which are not designed to be (re) charged, secondary (or rechargeable) batteries are batteries that are designed to be discharged and re-charged. Low-capacity secondary batteries are used for portable small-sized electronic devices such as smart phones, function phones, notebook computers, digital cameras, and video cameras, and large-capacity secondary batteries are widely used as power sources for driving motors in hybrid vehicles and electric vehicles and for storing electric power (e.g., electric power storage at home and/or utility scale). The secondary battery generally includes an electrode assembly including a positive electrode and a negative electrode, a case accommodating the electrode assembly, and an electrode terminal connected to the electrode assembly. Secondary batteries are used in various environments due to excellent electrical characteristics, but relatively small batteries may have limitations in terms of designable energy density. Since the amount of electrical energy that can be stored may be limited relative to the size and weight of the battery, there is a growing demand for larger batteries with higher energy densities in applications such as electric vehicles. The above information disclosed in this background section is for enhancement of understanding of the background of the present disclosure and, therefore, it may contain information that does not form a related (or prior) art. Disclosure of Invention If thermal runaway occurs in a large battery having a high energy density (for example, when thermal runaway occurs in a large battery having a high energy density), it may be difficult to extinguish a fire due to a high fire intensity. Embodiments of the present disclosure may relate to a method for manufacturing an electrode plate and an electrode assembly including the electrode plate. These and other aspects and features of the present disclosure will be described in, or be apparent from, the following description of the embodiments of the present disclosure. According to one or more embodiments of the present disclosure, a method for manufacturing an electrode plate includes placing a first active material layer on a first side of a substrate, drying the first active material layer placed on the first side of the substrate, placing a first ceramic coating on the first active material layer, and placing a second active material layer on a second side of the substrate opposite the first side. In an embodiment, the placement of the first ceramic coating and the placement of the second active material layer may be performed concurrently. In an embodiment, the method may further comprise concurrently drying the first ceramic coating and the second active material layer. In an embodiment, the first active material layer, the second active material layer, and the first ceramic coating layer may be dried by the same drying oven. In an embodiment, the first ceramic coating may comprise a thin film. In an embodiment, the thickness of the first ceramic coating may be in the range of 2 μm to 4 μm. In an embodiment, the first ceramic coating may be placed using gravure coating or spray coating. In an embodiment, the method may further include extruding a substrate having the first active material layer, the second active material layer, and the first ceramic coating layer disposed thereon. In an embodiment, the method may further include cutting the extruded substrate. In an embodiment, the method may further comprise placing a second ceramic coating on the second active material layer. In one or more embodiments according to the present disclosure, an electrode assembly includes a first electrode plate, a second electrode plate having a polarity different from that of the first electrode plate, and a separator interposed between the first electrode plate and the second electrode plate. The first electrode plate includes a substrate, a first active material layer on a first side of the substrate, a second active material layer on a second side of the substrate opposite the first side, and a first ceramic coating on the first active material layer. In an embodiment, the first electrode plate, the second electrode plate, and the separator may be wound together, and the first side of the substrate on which the first ceramic coating is disposed may face the winding core direction. In an embodiment, the total composition density of the first active material layer may be different from the total composition density of the second active material layer. In an embodiment, the total composition density of the first active material layer may be less than the total composition density of the second active