ELECTRODE STRUCTURE, METHOD OF MANUFACTURING THE SAME, SECONDARY BATTERY INCLUDING THE SAME

• US 20200136120A1
• Filed: 10/24/2019
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Active Grant

• Current Assignee: 4 To One Co., Ltd., Korea East-West Power Co., Ltd. (Government of South Korea), Ulsan National Institute of Science and Technology
• Original Assignee: Ulsan National Institute of Science and Technology
• Inventors: KIM, Young sik, KIM, Young jin, PARK, Jeong sun, JEON, Kyong min, KIM, Young gi, KIM, Myung jae
• Granted Patent: US 11,652,213 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/05 Accumulators with non-aqueous electrolyte H01M10/39 takes precedence
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 2004/025 with shapes other than plane or cylindrical
• CPC Class Codes: H01M 4/02 Electrodes composed of, or comprising, active material
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 4/70 characterised by shape or form
• CPC Class Codes: H01M 4/74 Meshes or woven material; Expanded metal
• CPC Class Codes: H01M 4/78 Shapes other than plane or cylindrical, e.g. helical
• CPC Class Codes: H01M 50/172 Arrangements of electric connectors penetrating the casing
• CPC Class Codes: H01M 50/531 Electrode connections inside a battery casing
• CPC Class Codes: H01M 50/543 Terminals
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The present invention relates to an electrode structure, a method of manufacturing the same, and a secondary battery including the same, and the electrode structure may include a negative electrode part; a positive current collector which is formed of a fabric material and surrounds an outer surface of the negative electrode part; and a positive electrode coupled to an edge of the positive current collector.

Claims

1. An electrode structure comprising:

a negative electrode part;

a positive current collector which is formed of a fabric material and surrounds an outer surface of the negative electrode part; and

a positive electrode coupled to an edge of the positive current collector.

2. The electrode structure of claim 1, wherein the positive electrode is formed to have an edge frame form in which a central portion is hollow.

3. The electrode structure of claim 1, wherein the positive electrode is formed of a metallic material.

4. The electrode structure of claim 1, wherein the positive electrode is formed to have a mesh form.

5. The electrode structure of claim 1, wherein the positive current collector and the positive electrode are coupled by spot welding.

6. The electrode structure of claim 1, wherein the positive current collector and the positive electrode are coupled by coupling a bolt and a nut.

7. The electrode structure of claim 1, wherein:

the negative electrode part includes a negative current collector in which a part of an upper end portion thereof is externally exposed to form an external connection terminal; and

the external connection terminal is insulated and sealed.

8. The electrode structure of claim 7, wherein:

the external connection terminal is soaked in a sealing material contained in a container;

the sealing material is solidified in a state in which the external connection terminal is soaked in the sealing material; and

the solidified sealing material is separated from the container.

14. An electrode structure stack comprising a plurality of electrode structures, each of which is the electrode structure according to claim 1.

15. The electrode structure stack of claim 14, wherein:

the negative electrode part includes a negative current collector in which a part of an upper end portion thereof is externally exposed to form an external connection terminal; and

the external connection terminals of the plurality of electrode structures are insulated and sealed.

16. The electrode structure stack of claim 15, wherein:

the external connection terminals are soaked in a sealing material contained in a container;

the sealing material is solidified in a state in which the external connection terminals are soaked in the sealing material; and

the solidified sealing material is separated from the container.

17. The electrode structure stack of claim 14, wherein:

each of the plurality of electrode structures includes one or more holes at the same position; and

the plurality of electrode structures are coupled by commonly insertion-coupling one bolt to each of the one or more holes and coupling a nut to the one bolt for each of the plurality of electrode structures.

9. A method of manufacturing an electrode structure, comprising:

forming a negative electrode part;

forming a positive current collector which is formed of a fabric material and surrounds an outer surface of the negative electrode part; and

forming a positive electrode coupled to an edge of the positive current collector.

10. The method of claim 9, wherein the forming of the positive electrode includes:

forming the positive electrode to have an edge frame form in which a central portion is hollow; and

coupling the positive electrode to the edge of the positive current collector.

11. The method of claim 9, wherein the forming of the positive electrode includes forming the positive electrode to have a mesh form.

12. The method of claim 9, wherein:

the forming of the negative electrode part includes forming a negative current collector in which a part of an upper end portion thereof is exposed to form an external connection terminal; and

the method further includes insulating and sealing the external connection terminal after the forming of the positive electrode.

13. The method of claim 12, wherein the insulating and sealing of the external connection terminal includes:

soaking the external connection terminal in a sealing material contained in a container;

solidifying the sealing material in a state in which the external connection terminal is soaked in the sealing material; and

separating the solidified sealing material from the container.

18. A secondary battery comprising:

a negative electrode part including a plurality of solid electrolytes, a negative active material, and a negative electrolytic solution;

a positive current collector which is formed of a fabric material and surrounds an outer surface of the negative electrode part; and

a positive electrode coupled to an edge of the positive current collector,

wherein the electrode structure is soaked in an ion containing solution including metal ions which are the same as metal ions included in the negative active material.

19. The secondary battery of claim 18, wherein:

the negative electrode part includes a negative current collector in which a part of an upper end portion thereof is externally exposed to form an external connection terminal; and

the external connection terminal is insulated and sealed.

20. The secondary battery of claim 19, wherein:

the external connection terminal is soaked in a sealing material contained in a container;

the sealing material is solidified in a state in which the external connection terminal is soaked in the sealing material; and

the solidified sealing material is separated from the container.