KR-20260067220-A - ALL-SOLID-STATE BATTERY AND METHOD OF MANUFACTURING ALL-SOLID-STATE BATTERY

KR20260067220AKR 20260067220 AKR20260067220 AKR 20260067220AKR-20260067220-A

Abstract

The present invention relates to an all-solid-state battery, comprising a plurality of first electrodes each comprising a first electrode body and a first electrode current collector each comprising a first electrode tab and a first electrode active material provided on the first electrode current collector; a plurality of second electrodes each comprising a second electrode body and a second electrode current collector each comprising a second electrode active material provided on the second electrode current collector, wherein the second electrodes are provided as electrodes different from the first electrode and are alternately stacked with the first electrode along a first direction, and a solid electrolyte provided between the first electrode and the second electrode. Each of the first electrode tab and the second electrode tab protrudes in a second direction intersecting the first direction from the first electrode body and the second electrode body, and the portion to which the first electrode tab of each of the plurality of first electrodes is in contact or the portion to which the second electrode tab of each of the plurality of second electrodes is in contact may be formed to be spaced apart in the first direction from the first electrode or the second electrode located at both ends of the first direction among the plurality of first electrodes and the plurality of second electrodes.

Inventors

조성주
김주민
최종환
이용훈
권현근
이용준
권태영
김윤선

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (17)

A plurality of first electrodes each comprising a first electrode body and a first electrode tab, a first electrode current collector and a first electrode active material provided on the first electrode current collector; A plurality of second electrodes, each comprising a second electrode current collector having a second electrode body and a second electrode tab, and a second electrode active material provided on the second electrode current collector, wherein the second electrode is provided as a different electrode from the first electrode and is alternately stacked with the first electrode along a first direction; and A solid electrolyte provided between the first electrode and the second electrode; comprising Each of the first electrode tab and the second electrode tab protrudes from the first electrode body and the second electrode body in a second direction intersecting the first direction, and A solid-state battery, wherein the portion to which the first electrode tab of each of the plurality of first electrodes is in contact, or the portion to which the second electrode tab of each of the plurality of second electrodes is in contact, is formed to be spaced apart in the first direction from the first electrode or the second electrode located at both ends of the first direction among the plurality of first electrodes and the plurality of second electrodes.
In paragraph 1, The first electrode tab of each of the plurality of first electrodes is in close contact with one side of the second direction of the first electrode body and the second electrode body, and A solid-state battery in which the second electrode tabs of each of the plurality of second electrodes are in close contact with each other on the other side of the first electrode body and the second electrode body in the second direction.
In paragraph 2, A solid-state battery in which the area of the first electrode active material is formed to be larger than the area of the second electrode active material.
In paragraph 2, An all-solid-state battery further comprising: an edge member disposed along the circumference of the second electrode active material and in contact with the second electrode tab.
In paragraph 1, The first electrode is provided as a negative electrode, and The above-mentioned second electrode is an all-solid-state battery equipped as a positive electrode.
At least one first electrode and at least one second electrode having a different electrode from the first electrode, and at least one solid electrolyte having a first electrode and a second electrode stacked along a first direction; The at least one first electrode, the at least one second electrode, and the at least one solid electrolyte are laminated on a jig plate and packaged with an outer casing; and Pressing the above-packaged at least one first electrode, the at least one solid electrolyte, and the at least one second electrode in the first direction; comprising, The first electrode comprises a first electrode body and a first electrode current collector having a first electrode tab protruding from the first electrode body in a second direction intersecting the first direction. The second electrode comprises a second electrode current collector having a second electrode body and a second electrode tab protruding in the second direction from the second electrode body. A method for manufacturing an all-solid-state battery, wherein when the at least one first electrode, the at least one second electrode, and the at least one solid electrolyte are stacked on the jig plate, the first electrode tab and the second electrode tab are spaced apart from the jig plate in the first direction.
In paragraph 6, The two ends of the second direction of the above jig plate are, A method for manufacturing an all-solid-state battery, wherein the first electrode body is positioned inwardly to the second direction from both ends of the second direction, or positioned in a location corresponding to the first direction and the position of both ends of the second direction of the first electrode body.
In paragraph 6, The two ends of the second direction of the above jig plate are, A method for manufacturing an all-solid-state battery, wherein the two ends of the first electrode body in the second direction and the two ends of the second electrode body in the second direction are disposed between each other.
In paragraph 6, Packaging the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode with the above-mentioned outer material is, A method for manufacturing an all-solid-state battery, comprising further disposing of a protective film between the first electrode or the second electrode located at one end of the first direction among the at least one first electrode and the at least one second electrode, and the jig plate, and packaging the protective film together with the outer material.
In Paragraph 9, The two ends of the above-mentioned protective film in the second direction are, A method for manufacturing an all-solid-state battery, wherein the jig plate is positioned outside the second direction from both ends of the second direction, or positioned at a location corresponding to the first direction and the position of both ends of the second direction of the jig plate.
In paragraph 6, Packaging the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode with the above-mentioned outer material is, A method for manufacturing an all-solid-state battery, further comprising wrapping the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode with an inner outer material, and then wrapping the inner outer material and the jig plate together with the outer material.
In paragraph 6, The above jig plate is, Jig plate body; and Jig plate covers disposed on both sides of the second direction of the jig plate body; comprising A method for manufacturing an all-solid-state battery, wherein the above jig plate cover is provided with an elastic member.
In Paragraph 12, The two ends of the second direction of the above jig plate are, A method for manufacturing an all-solid-state battery, wherein the first electrode body is positioned inwardly to the second direction from both ends of the second direction, or positioned in a location corresponding to the first direction and the position of both ends of the second direction of the first electrode body.
In Paragraph 12, The two ends of the second direction of the above jig plate cover are, A method for manufacturing an all-solid-state battery, wherein the two ends of the first electrode body in the second direction and the two ends of the second electrode body in the second direction are disposed between each other.
In paragraph 6, A method for manufacturing an all-solid-state battery, further comprising: pressing the packaged at least one first electrode, the at least one solid electrolyte, and the at least one second electrode, then unpacking the outer material and further stacking the first electrode, the solid electrolyte, and the second electrode, each provided in a plurality.
In paragraph 15, A method for manufacturing an all-solid-state battery, further comprising: stacking the plurality of first electrodes, the plurality of solid electrolytes, and the plurality of second electrodes, and then joining the first electrode tabs of each of the plurality of first electrodes to a first lead, and joining the second electrode tabs of each of the plurality of second electrodes to a second lead.
In Paragraph 16, A method for manufacturing an all-solid-state battery, further comprising: packaging the plurality of stacked first electrodes, the plurality of solid electrolytes, and the plurality of second electrodes together in a post-exterior material.

Description

All-solid-state battery and method of manufacturing all-solid-state battery The present invention relates to an all-solid-state battery and a method for manufacturing an all-solid-state battery. Unlike primary batteries that cannot be recharged after discharge, secondary batteries, which can be repeatedly charged and discharged, are becoming increasingly important as they can be applied in various fields such as smartphones, automobiles, drones, and robots. Secondary batteries according to conventional technology use liquid as the electrolyte, which has a problem of reduced stability, such as explosions and fires if expansion due to temperature changes or leakage due to external impact occurs, and research and development on all-solid-state batteries are actively being carried out to solve these problems. In all-solid-state batteries, the electrolyte located between the positive and negative active materials is solid, resulting in high structural stability that may eliminate the need for a separator. This offers the advantages of enabling battery miniaturization and higher energy density. However, all-solid-state batteries have limitations, such as performance degradation caused by the expansion and contraction of the electrode active materials during charging and discharging, which leads to delamination at the interface between the electrode active material and the solid electrolyte. To this end, an isotropic pressurization process of the all-solid-state battery may be performed to prevent delamination of the interface between the electrode active material and the solid electrolyte; at this time, there is an increasing need for a structure to prevent damage to the electrode tab of the electrode current collector during isotropic pressurization. FIG. 1 is a vertical cross-sectional view of an all-solid-state battery according to one embodiment of the present invention. FIG. 2 is a flowchart according to a method for manufacturing an all-solid-state battery according to one embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of a unit pressurized laminate in the pressurization step of a method for manufacturing an all-solid-state battery according to one embodiment of the present invention. FIG. 4 is a vertical cross-sectional view of a unit pressurized laminate in the pressurization step of a method for manufacturing an all-solid-state battery according to another embodiment of the present invention. FIG. 5 is a vertical cross-sectional view of a unit pressurized laminate in the pressurization step of a method for manufacturing an all-solid-state battery according to another embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a unit pressurized laminate in the pressurization step of a method for manufacturing an all-solid-state battery according to another embodiment of the present invention. FIG. 7 is a vertical cross-sectional view of a unit pressurized laminate in the pressurization step of a method for manufacturing an all-solid-state battery according to another embodiment of the present invention. FIG. 8 is a vertical cross-sectional view of a unit pressurized laminate in the pressurization step of a method for manufacturing an all-solid-state battery according to another embodiment of the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by such terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8. FIG. 1 is a vertical cross-sectional view of an all-solid-state battery according to one embodiment of the present invention. Referring to FIG. 1,