KR-20260067045-A - SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

KR20260067045AKR 20260067045 AKR20260067045 AKR 20260067045AKR-20260067045-A

Abstract

The present disclosure provides a secondary battery and a method for manufacturing a secondary battery. A secondary battery according to the present disclosure may include an electrode assembly comprising a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, a bottom portion facing an upper opening, and a side wall portion connected to the bottom portion, and may include an insulating structure disposed between the bottom portion of a case in which the electrode assembly is received and the electrode assembly, and between the side wall portion and the electrode assembly.

Inventors

이기정

Assignees

삼성에스디아이 주식회사

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (20)

An electrode assembly comprising a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode; A case comprising a bottom portion facing an upper opening and a side wall portion connected to said bottom portion, wherein the electrode assembly is accommodated; and An insulating structure disposed between the bottom portion and the electrode assembly and between the side wall portion and the electrode assembly A secondary battery including
In Article 1, The above insulating structure is, A secondary battery comprising at least one of polypropylene (PP), polyethylene (PE), or polybutylene terephthalate (PBT).
In Article 1, The above insulating structure is, An insulating ring having a ring shape and disposed along the edge connecting the side wall portion to the bottom portion; and A secondary battery comprising at least one insulating leg portion extending in a first direction from the insulating ring and disposed between the sidewall portion and the electrode assembly.
In Paragraph 3, The above-mentioned at least one insulating leg portion extends along the first direction with a width that decreases in a second direction different from the first direction, a secondary battery.
In Paragraph 3, A secondary battery in which the length of at least one insulating leg portion in the first direction is smaller than the length of the electrode assembly in the first direction.
In Paragraph 3, It further includes a current collector plate disposed on the lower surface of the electrode assembly facing the bottom portion and electrically connected to the first electrode, and A secondary battery in which the insulating ring is spaced apart from the current collector plate in a second direction different from the first direction.
In Article 6, A secondary battery in which the insulating ring overlaps with the first electrode in the first direction and overlaps with the current collector plate in the second direction.
In Article 6, A rivet penetrating the bottom portion from the outside of the bottom portion and coupled to the current collector plate; and A secondary battery further comprising an electrode terminal coupled to the above rivet and electrically connected to the above current collector plate.
In Paragraph 3, A secondary battery further comprising a fire extinguishing patch disposed on at least one insulating leg portion.
In Article 9, The above digestive patch is, It includes a plurality of microcapsules containing digestive agents, and A secondary battery in which the extinguishing agent is released from the plurality of microcapsules when a predetermined temperature is applied to the insulating structure.
An electrode assembly comprising a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode; A case comprising a bottom portion facing an upper opening and a side wall portion connected to said bottom portion, wherein the electrode assembly is accommodated; and An insulating structure disposed between the bottom portion and the electrode assembly and between the side wall portion and the electrode assembly Includes, The first electrode above is, A first coating portion having an active material applied to both sides of a first substrate comprising a conductive metal material; and A first uncoated portion where the first substrate is exposed because the above active material is not coated. Includes, A secondary battery in which the first non-removable portion is disposed on the lower surface of the electrode assembly facing the bottom portion.
In Article 11, The above insulating structure is, A secondary battery comprising at least one of polypropylene (PP), polyethylene (PE), or polybutylene terephthalate (PBT).
In Article 11, The above insulating structure is, An insulating ring having a ring shape and disposed along the edge connecting the side wall portion to the bottom portion; and A secondary battery comprising at least one insulating leg portion extending in a first direction from the insulating ring and disposed between the sidewall portion and the electrode assembly.
In Article 13, The above-mentioned at least one insulating leg portion extends along the first direction with a width that decreases in a second direction different from the first direction, a secondary battery.
In Article 13, A secondary battery in which the length of at least one insulating leg portion in the first direction is smaller than the length of the electrode assembly in the first direction.
In Article 13, It further includes a first current collector plate disposed on the first non-removable portion and electrically connected to the first electrode, and The above insulating ring is arranged spaced apart from the first current collector plate in a second direction different from the first direction, in a secondary battery.
In Article 16, A secondary battery in which the insulating ring overlaps with the first electrode in the first direction and overlaps with the first current collector plate in the second direction.
In Article 13, A secondary battery further comprising a fire extinguishing patch disposed on at least one insulating leg portion.
In Article 18, The above digestive patch is, It includes a plurality of microcapsules containing digestive agents, and A secondary battery in which the extinguishing agent is released from the plurality of microcapsules when a predetermined temperature is applied to the insulating structure.
In Article 11, The second electrode above is, A second coating portion having an active material applied to both sides of a second substrate comprising a conductive metal material; and A second uncoated portion where the second substrate is exposed because the above active material is not coated. Includes, The above second non-removable portion is disposed on the upper surface of the electrode assembly facing the upper opening, and It further includes a second current collector plate disposed on the second non-removable portion and electrically connected to the second electrode, and The above second current collector plate is electrically connected to the above side wall portion, a secondary battery.

Description

Secondary Battery and Method for Manufacturing Same The present disclosure relates to a secondary battery and a method for manufacturing a secondary battery. 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. Although rechargeable batteries are used in various environments due to their excellent electrical characteristics, conventional small batteries have had limitations in terms of designable energy density. Since the amount of electrical energy that can be stored is limited relative to the size and weight of the battery, there is a gradually increasing demand for large batteries with higher energy density in applications such as electric vehicles. 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 is a drawing showing a secondary battery according to some embodiments of the present disclosure. FIG. 2 is a drawing showing an insulating structure according to one embodiment of the present disclosure. FIG. 3 is a drawing showing an insulating structure according to one embodiment of the present disclosure. FIG. 4 is a drawing showing an insulating structure and a fire extinguishing patch according to one embodiment of the present disclosure. FIG. 5 is a drawing showing an electrode assembly combined with an insulating structure according to some embodiments of the present disclosure. FIG. 6 is a drawing showing an enlarged cross-section of a secondary battery including an electrode assembly combined with an insulating structure according to FIG. 5. FIG. 7 is a drawing showing a secondary battery according to some embodiments of the present disclosure. FIG. 8 is a flowchart illustrating an example of a method for manufacturing a secondary battery according to some embodiments 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, 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, the same reference numerals may be assigned to identical components in different embodiments. The statement that two subjects of comparison are 'identical' means that they are 'substantially identical'. Therefore, substantial identity may include deviations considered low in the industry, for example, deviations within 5%. Additionally, the statement that a parameter is uniform in a given area may mean that it is uniform from an average perspective. Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms ar