CN-122000281-A - All-solid-state battery and method for manufacturing all-solid-state battery

CN122000281ACN 122000281 ACN122000281 ACN 122000281ACN-122000281-A

Abstract

The invention relates to an all-solid battery and a method for manufacturing the all-solid battery, wherein the all-solid battery comprises a plurality of first electrodes, each of which comprises a first electrode collector and a first electrode active substance, the first electrode collector comprises a first electrode main body and a first electrode pole piece, a plurality of second electrodes, each of which comprises a second electrode collector and a second electrode active substance, the second electrode collector comprises a second electrode main body and a second electrode pole piece, and a solid electrolyte arranged between the first electrodes and the second electrodes, wherein the first electrode pole piece and the second electrode pole piece respectively protrude from the first electrode main body and the second electrode main body towards a second direction, and a part of each of the plurality of first electrode pole pieces, which is in tight contact with the first electrode pole piece, or a part of each of the plurality of second electrode pole pieces, which is in tight contact with the second electrode pole pieces, are formed to be spaced from the first electrode or the second electrode at two ends of the plurality of first electrodes and the plurality of second electrodes along the first direction.

Inventors

ZHAO CHENGZHU
JIN ZHUMIN
Cui Zhonghuan
LI YONGXUN
Quan Xiangen
LI RONGJUN
Quan Duirong
Jin Yunxuan

Assignees

现代自动车株式会社
起亚株式会社

Dates

Publication Date: 20260508
Application Date: 20250915
Priority Date: 20241105

Claims (17)

1. An all-solid battery comprising: a plurality of first electrodes, each first electrode including a first electrode collector and a first electrode active material formed on the first electrode collector, the first electrode collector including a first electrode body and a first electrode tab; A plurality of second electrodes having a polarity different from that of the first electrodes, alternately stacked with the first electrodes along a first direction, each second electrode including a second electrode collector and a second electrode active material formed on the second electrode collector, the second electrode collector including a second electrode body and a second electrode tab, and A solid electrolyte provided between the first electrode and the second electrode, Wherein the first electrode tab and the second electrode tab protrude from the first electrode main body and the second electrode main body, respectively, in a second direction crossing the first direction, The portion of the first electrode pads of the first electrodes or the portion of the second electrode pads of the second electrodes are formed to be spaced apart from the first electrode or the second electrode of the first electrodes and the second electrodes at both ends of the first direction along the first direction.
2. The all-solid battery according to claim 1, wherein, The first electrode plates of the first electrodes are closely contacted with one another at one side of the second direction of the first electrode main body and the second electrode main body, The second electrode pole pieces of the second electrodes are closely contacted with each other at the other sides of the second direction of the first electrode main body and the second electrode main body.
3. The all-solid battery according to claim 2, wherein, The first electrode active material is formed to have an area larger than that of the second electrode active material.
4. The all-solid battery according to claim 2, further comprising: And an edge member disposed along a periphery of the second electrode active material and in contact with the second electrode tab.
5. The all-solid battery according to claim 1, wherein, The first electrode is a negative electrode and, The second electrode is an anode.
6. A method of manufacturing an all-solid-state battery, comprising: Stacking at least one first electrode, at least one second electrode having a different polarity from the first electrode, and at least one solid electrolyte disposed between the first electrode and the second electrode along a first direction; stacking the at least one first electrode, the at least one second electrode, and the at least one solid electrolyte to a clamping plate and packaging with a packaging material, and Pressurizing the at least one first electrode, the at least one solid electrolyte, the at least one second electrode after packaging along a first direction; wherein the first electrode includes a first electrode collector having a first electrode body and a first electrode tab protruding from the first electrode body to a second direction crossing the first direction, The second electrode includes a second electrode collector having a second electrode body and a second electrode tab protruding from the second electrode body in a second direction, The first electrode tab and the second electrode tab are configured to be spaced apart from the clamping plate along the first direction when the at least one first electrode, the at least one second electrode, and the at least one solid electrolyte are stacked on the clamping plate.
7. The manufacturing method of an all-solid battery according to claim 6, wherein, The two ends of the clamping plate in the second direction are arranged on the inner side of the first electrode main body in the second direction, or The two ends of the clamping plate in the second direction are arranged at positions corresponding to the positions of the two ends of the first electrode main body in the second direction in the first direction.
8. The manufacturing method of an all-solid battery according to claim 6, wherein, The two ends of the clamping plate in the second direction are arranged between the two ends of the first electrode main body in the second direction and the two ends of the second electrode main body in the second direction.
9. The manufacturing method of an all-solid battery according to claim 6, wherein, The step of packaging the at least one first electrode, the at least one solid electrolyte, the at least one second electrode with the packaging material includes: A protective film is further disposed between the first electrode or the second electrode located at one end of the at least one first electrode and the at least one second electrode in the first direction and the clamping plate, and the protective film is packaged together with the packaging material.
10. The method for manufacturing an all-solid battery according to claim 9, The two ends of the protective film in the second direction are arranged further outside the second direction than the two ends of the clamping plate in the second direction, or The two ends of the protective film in the second direction are arranged at positions corresponding to the positions of the two ends of the clamping plate in the second direction in the first direction.
11. The manufacturing method of an all-solid battery according to claim 6, wherein, The step of packaging the at least one first electrode, the at least one solid electrolyte, the at least one second electrode with the packaging material includes: after wrapping the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode with an inner encapsulation material, the inner encapsulation material is wrapped with the clamping plate.
12. The manufacturing method of an all-solid battery according to claim 6, wherein the clamping plate comprises: A splint body, and Clamping plate covers arranged on two sides of the clamping plate main body in the second direction; The clamping plate cover is an elastic component.
13. The method for manufacturing an all-solid battery according to claim 12, wherein, The two ends of the clamping plate in the second direction are arranged on the inner side of the first electrode main body in the second direction, or The two ends of the clamping plate in the second direction are arranged at positions corresponding to the positions of the two ends of the first electrode main body in the second direction in the first direction.
14. The method for manufacturing an all-solid battery according to claim 12, wherein, The two ends of the clamping plate cover in the second direction are arranged between the two ends of the first electrode main body in the second direction and the two ends of the second electrode main body in the second direction.
15. The manufacturing method of an all-solid battery according to claim 6, further comprising: after pressurizing the at least one first electrode, the at least one solid electrolyte and the at least one second electrode after packaging, the packaging material is unpacked, and the plurality of first electrodes, the plurality of solid electrolytes and the plurality of second electrodes are further stacked.
16. The manufacturing method of an all-solid battery according to claim 15, further comprising: after stacking a plurality of first electrodes, a plurality of solid electrolytes, and a plurality of second electrodes, the first electrode pads of the first electrodes are bonded to each other and to the first wire, and the second electrode pads of the second electrodes are bonded to each other and to the second wire.
17. The manufacturing method of an all-solid battery according to claim 16, further comprising: the stacked plurality of first electrodes, the plurality of solid electrolytes, and the plurality of second electrodes are packaged together with a post-encapsulation material.

Description

All-solid-state battery and method for manufacturing all-solid-state battery Technical Field The present invention relates to an all-solid-state battery and a method for manufacturing the same. Background Unlike primary batteries which cannot be charged after discharge, secondary batteries which can be repeatedly charged and discharged can be applied to various fields such as smart phones, vehicles, unmanned aerial vehicles, robots and the like, and the importance of the secondary batteries is increasingly improved. The secondary battery according to the related art has a problem of poor stability due to the use of a liquid as an electrolyte, such as explosion and fire, which may be caused when swelling occurs due to temperature change or leakage occurs due to external impact, and research and development on all-solid-state batteries are actively being conducted to solve the problem. In an all-solid-state battery, the electrolyte between the positive electrode active material and the negative electrode active material is composed of a solid, and therefore, structural stability is high, and a separator may not be necessary. This feature gives it the advantage of enabling miniaturization of the battery and further improving the energy density. However, all-solid batteries have a limitation in that expansion and contraction of the electrode active material occur during charge and discharge, thereby possibly causing peeling of the interface of the electrode active material and the solid electrolyte, and further causing performance degradation. In order to solve this problem, the interfacial separation between the electrode active material and the solid electrolyte can be prevented by performing the isostatic pressing step on the all-solid-state battery, and in this case, the necessity of a structure for preventing the electrode tab of the electrode collector from being damaged during warm isostatic pressing increases. Disclosure of Invention Embodiments of the present invention are directed to providing an all-solid battery capable of preventing damage of an electrode tab at the time of warm isostatic pressing and a method of manufacturing the all-solid battery. The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description. An all-solid battery according to an embodiment of the present invention includes a plurality of first electrodes each including a first electrode collector and a first electrode active material formed on the first electrode collector, the first electrode collector including a first electrode body and a first electrode tab, a plurality of second electrodes having polarities different from those of the first electrodes and alternately stacked with the first electrodes along a first direction, each second electrode including a second electrode collector and a second electrode active material formed on the second electrode collector, the second electrode collector including a second electrode body and a second electrode tab, and a solid electrolyte provided between the first electrode and the second electrode, wherein the first electrode tab and the second electrode tab protrude from the first electrode body and the second electrode body in a second direction intersecting the first direction, and a portion where the respective first electrode tab of the plurality of first electrodes is formed or a portion where the respective second electrode tab is in close contact with the respective second electrode are located in the first direction or the plurality of second electrode tabs in close contact with the second electrode. The first electrode pieces of the first electrodes are closely adhered to one another on one side of the second direction of the first electrode body and the second electrode body, and the second electrode pieces of the second electrodes are closely adhered to one another on the other side of the second direction of the first electrode body and the second electrode body. The area of the first electrode active material is formed to be larger than the area of the second electrode active material. The all-solid battery according to the embodiment of the invention further includes an edge member disposed along the periphery of the second electrode active material and in contact with the second electrode tab. The first electrode is a negative electrode, and the second electrode is a positive electrode. The method for manufacturing the all-solid battery according to the embodiment of the invention comprises stacking at least one first electrode, at least one second electrode having a polarity different from that of the first electrode, and at least one solid electrolyte provided between the first electrode and the second electrode in a first direction, stacking the at least one first electrode, the at least one se