KR-20260064124-A - ELECTRODE ASSEMBLY METHOD FOR MANUFACTURING THEREOF

KR20260064124AKR 20260064124 AKR20260064124 AKR 20260064124AKR-20260064124-A

Abstract

The present disclosure provides an electrode assembly. The electrode assembly comprises a electrode plate having a composite portion on which an active material is coated on both sides of a composite substrate and a non-composite portion on which the active material is not coated, a conductor coupled to the non-composite portion, and an insulating layer covering at least a portion of each of the non-composite portion, the composite portion, and the conductor, wherein the non-composite portion is coupled to a first surface of the conductor and the insulating layer is disposed on a second surface of the conductor facing the first surface.

Inventors

정광조

Assignees

삼성에스디아이 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (20)

An electrode plate comprising a composite portion having an active material coated on both sides of a composite substrate and a non-composite portion on the composite substrate where the active material is not coated; A conductor coupled to the above-mentioned non-conductive portion; and An insulating layer covering at least a portion of each of the above-mentioned uncoated portion, the above-mentioned composite portion, and the above-mentioned conductor Includes, The above-mentioned non-transparent portion is coupled to the first surface of the above-mentioned conductor, and An electrode assembly in which the insulating layer is disposed on the second surface of the conductor facing the first surface.
In paragraph 1, The above composite material is, Polymer substrate; A first metal layer disposed on one surface of the polymer substrate; and A second metal layer disposed on the other side of the polymer substrate. Includes, An electrode assembly in which the first metal layer and the second metal layer are formed of the same material.
In paragraph 1, The above conductor includes a first region that combines with the above-mentioned non-conductive portion, and The above insulating layer includes a first insulating layer covering the conductor, and An electrode assembly in which, when viewed in a direction perpendicular to the second surface of the conductor, the first region is located inside the first insulating layer.
In paragraph 3, The first region above is an electrode assembly spaced apart from the composite part.
In paragraph 4, An electrode assembly in which the distance between the first region and the composite part is 0.3 mm or more.
In paragraph 3, An electrode assembly in which the upper end of the first insulating layer is located at least 0.5 mm higher than the upper end of the first region.
In paragraph 3, An electrode assembly comprising an insulating layer connected to the first insulating layer and a second insulating layer covering an uninsulated portion located between the first region and the composite portion.
In Paragraph 7, An electrode assembly comprising an insulating layer connected to the second insulating layer and a third insulating layer covering at least a portion of the composite part.
In paragraph 8, An electrode assembly in which the lower end of the third insulating layer is located at least 0.3 mm lower than the upper end of the composite part.
In paragraph 3, The polarity of the above composite material is positive, and An electrode assembly having a vertical length of the first region of the above-mentioned first region of 1.5 mm to 5.5 mm.
In paragraph 3, The polarity of the above composite material is negative, and An electrode assembly having a vertical length of the first region of the above-mentioned first region of 2.0 mm to 6.0 mm.
In paragraph 2, The above conductor includes a first conductor coupled to the first metal layer and a second conductor coupled to the second metal layer, and The electrode assembly comprises a first conductor having a first region coupled to the first metal layer and a second region coupled to the second conductor.
In Paragraph 12, The second region is an electrode assembly located above the first region.
In Paragraph 12, The above insulating layer is, A first insulating layer in which the first region is located on the inside when viewed in a direction perpendicular to the second surface of the conductor; and A second insulating layer connected to the first insulating layer. Includes, An electrode assembly in which, when viewed in a direction perpendicular to the second surface of the conductor, the second region is located inside the second insulating layer.
In Paragraph 14, An electrode assembly in which the longitudinal length of the second insulating layer is at least 0.25 times the longitudinal length of the first insulating layer.
In Paragraph 12, The end of the second conductor corresponds to the end of the second region, forming an electrode assembly.
In paragraph 1, The above insulating layer comprises at least one of alumina or boehmite, forming an electrode assembly.
In paragraph 1, The above insulating layer comprises ceramic and binder, and An electrode assembly in which the ratio of the binder to the ceramic is 15 wt% to 45 wt%.
A step of preparing a plurality of electrode plates, each comprising a composite portion having an active material coated on both sides of a composite substrate and a non-composite portion on the composite substrate where the active material is not coated; A step of combining a conductor to the non-conductive portion of each of the plurality of electrode plates; A step of arranging an insulating layer to cover a non-existent portion of each of the plurality of electrode plates, a composite portion of each of the plurality of electrode plates, and a portion of each of the conductors; and A step of manufacturing an electrode assembly by laminating a plurality of electrode plates, wherein the conductor is combined and the insulating layer is disposed thereon, and a separator interposed between the plurality of electrode plates. A method for manufacturing an electrode assembly comprising
In Paragraph 19, The above composite material is, Polymer substrate; A first metal layer disposed on one surface of the polymer substrate; and A second metal layer disposed on the other side of the polymer substrate. Includes, A method for manufacturing an electrode assembly in which the first metal layer and the second metal layer are formed of the same material.

Description

Electrode assembly and method for manufacturing the electrode assembly The present disclosure relates to an electrode assembly and a method for manufacturing an electrode assembly. Unlike primary batteries, which cannot be recharged, secondary batteries are batteries capable of both charging and discharging. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for motor drive systems and power storage batteries in hybrid and electric vehicles. Such secondary batteries include an electrode assembly consisting of a positive electrode and a negative electrode, a case housing the assembly, and electrode terminals connected to the electrode assembly. Recently, there has been a growing customer demand for weight reduction in secondary batteries used in portable IT devices, automobiles, and the like. To achieve this, some conventional technologies have been developed by thinning materials such as substrates, separators, and casings, or by increasing energy density through the improvement of active material properties. However, some of these development directions have resulted in a decrease in the safety of secondary batteries. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 shows an example of a secondary battery according to one embodiment of the present disclosure. FIG. 2 is a drawing showing an example of a composite substrate according to one embodiment of the present disclosure. FIG. 3 is a cross-sectional view showing an example of a part of an electrode assembly according to one embodiment of the present disclosure. FIG. 4 is a drawing showing an example of an electrode assembly in which a portion of the insulating layer is omitted when viewed from a vertical direction according to one embodiment of the present disclosure. FIG. 5 is a drawing showing an example in which a conductor according to one embodiment of the present disclosure is bonded to a composite substrate. FIG. 6 is a drawing showing an example in which a conductor according to one embodiment of the present disclosure is bonded to a composite substrate. FIG. 7 is a drawing showing an example of an electrode assembly with an insulating layer omitted according to one embodiment of the present disclosure. FIG. 8 is a drawing showing an example of an electrode assembly with an insulating layer omitted according to one embodiment of the present disclosure. FIG. 9 is a flowchart illustrating an example of a method for manufacturing an electrode assembly according to one embodiment of the present disclosure. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. It should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments. Additionally, as used herein, “comprise, include” and/or “comprising, including” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and/or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and/or groups. Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, th