KR-20260066878-A - All-solid-state battery

Abstract

A solid-state battery according to one embodiment comprises a case having electrical insulation, a solid-state battery element housed within the case and including a first external electrode and a second external electrode, and an electrically insulating resin that covers at least a portion of the solid-state battery element and is housed within the case, wherein the first external electrode includes a first end embedded in the electrically insulating resin and a second end exposed from the electrically insulating resin, and the second external electrode may include a third end embedded in the electrically insulating resin and a fourth end exposed from the electrically insulating resin.

Inventors

• 정재현
• 김한
• 이영일
• 지수영
• 하상훈
• 안윤영

Assignees

• 삼성전기주식회사

Dates

Publication Date

20260512

Application Date

20241105

Claims (14)

1. Case with electrical insulation properties, An all-solid-state battery device housed within the above-mentioned case and comprising a first external electrode and a second external electrode, and An electrical insulating resin that covers at least a portion of the above-mentioned all-solid-state battery element and is accommodated within the case. Includes, The first external electrode comprises a first end embedded in the electrical insulating resin and a second end exposed from the electrical insulating resin. The above-mentioned second external electrode comprises a third end embedded in the electrical insulating resin and a fourth end exposed from the electrical insulating resin, in an all-solid-state battery.
2. In paragraph 1, A solid-state battery in which at least a portion of the above-described solid-state battery element is spaced apart from the inner surface of the above-described case.
3. In paragraph 2, A solid-state battery in which the electrical insulating resin is filled between the solid-state battery element and the inner surface of the case.
4. In paragraph 1, A solid-state battery having a protrusion disposed on the inner surface of the above case.
5. In Paragraph 4, The above-mentioned protrusion is in contact with the above-mentioned all-solid-state battery element, all-solid-state battery.
6. In Paragraph 4, The above-mentioned protrusion includes a plurality of stripe patterns, in an all-solid-state battery.
7. In paragraph 1, The above-described all-solid-state battery device comprises a laminate including a plurality of solid electrolyte layers, a plurality of positive electrode layers, and a plurality of negative electrode layers stacked in a first direction. Includes, The first external electrode is disposed outside the laminate and is electrically connected to the plurality of anode layers, The above-mentioned second external electrode is disposed outside the above-mentioned laminate and is electrically connected to the plurality of negative electrode layers, in an all-solid-state battery.
8. In Paragraph 7, A first conductive bonding member disposed between the first external electrode and the plurality of anode layers, and A second conductive bonding member disposed between the second external electrode and the plurality of cathode layers. A solid-state battery further comprising
9. In paragraph 8, The first conductive junction member and the second conductive junction member comprise silver (Ag), forming an all-solid-state battery.
10. In Paragraph 7, The above electrical insulating resin covers the outer surface of the above solid-state battery element intersecting the above first direction, in a solid-state battery.
11. In Paragraph 10, The above electrical insulating resin is an all-solid-state battery exposed from the case in the first direction.
12. In Paragraph 11, The second end of the first external electrode is exposed from the electrical insulating resin in the first direction, and A solid-state battery in which the fourth end of the second external electrode is exposed from the electrical insulating resin in the first direction.
13. In paragraph 1, The above case is an all-solid-state battery comprising a polymer resin.
14. In paragraph 1, The above electrical insulating resin is an all-solid-state battery comprising an epoxy molding compound (EMC).

Description

All-solid-state battery The present disclosure relates to an all-solid-state battery. Recently, as portable electronic devices are required to be miniaturized and used for extended periods, there is a demand for high-capacity batteries, and with the widespread adoption of wearable electronic devices, there is a demand to ensure the safety of batteries. Since commercially available lithium-ion batteries use electrolytes containing flammable organic solvents, there is a possibility of overheating and fire in the event of a short circuit. Therefore, all-solid-state batteries using solid electrolytes instead of liquid electrolytes are being proposed. As the volume of the electrode active material layer changes during charging and discharging, the all-solid-state battery may expand. Inside the expanded all-solid-state battery, the electrode may be damaged or the bonding at the electrode-solid electrolyte interface may be compromised, leading to poor contact and a deterioration in battery performance, particularly charge-discharge cycle performance. Furthermore, due to the difference in expansion rates between the electrode and the solid electrolyte, cracks may form in the all-solid-state battery, allowing moisture to penetrate. FIG. 1 is a schematic perspective view illustrating an all-solid-state battery according to one embodiment. Figure 2 is a schematic exploded perspective view of Figure 1. Figure 3 is a schematic plan view of Figure 1. Figure 4 is a cross-sectional view taken along line II' of Figure 1. FIG. 5 is a schematic perspective view illustrating the all-solid-state battery element of FIG. 1. FIG. 6 is a schematic perspective view illustrating a stack of the all-solid-state battery device of FIG. 5. Figure 7 is a cross-sectional view taken along the line II-II' of Figure 5. FIG. 8 is an exploded perspective view schematically illustrating the internal structure of the laminate of FIG. 6. FIG. 9 is a partial cross-sectional view schematically illustrating the positive electrode layer of the all-solid-state battery device of FIG. 5. FIG. 10 is a partial cross-sectional view schematically illustrating the negative electrode layer of the all-solid-state battery device of FIG. 5. FIG. 11 is a schematic perspective view illustrating an all-solid-state battery according to another embodiment. Fig. 12 is a schematic exploded perspective view of Fig. 11. Figure 13 is a schematic plan view of Figure 11. FIG. 14 is a cross-sectional view taken along the line III-III' of FIG. 13. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. In order to clearly explain the invention in the drawings, parts unrelated to the explanation have been omitted, and the same reference numerals have been used for identical or similar components throughout the specification. Furthermore, in the attached drawings, some components may be exaggerated, omitted, or schematically depicted, and the size of each component does not entirely reflect its actual size. The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that all modifications, equivalents, and substitutions included within the concept and technical scope of the present invention are included. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Throughout the specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Accordingly, when a part is said to “comprising” a certain component, unless specifically stated otherwise, this means that it may include additional components rather than excluding other components. Additionally, throughout the specification, "planar" means w