KR-20260067717-A - SECONDARY BATTERY AND ELECTRONIC DEVICE INCLUDING SAME

Abstract

The present invention relates to a battery case, and the technical problem to be solved is to provide a battery case comprising a lower case composed of a metal layer, an adhesive layer, and a polymer layer. To this end, the battery case according to the present invention comprises a lower case including a receiving portion for accommodating an electrode assembly and a flange portion surrounding the receiving portion, and an upper cover disposed facing at least a portion of the flange portion of the lower case, wherein at least a portion of the lower case has a laminated structure of a metal layer exposed to the outside, an adhesive layer in contact with the metal layer, and a polymer layer in contact with the adhesive layer.

Inventors

• 홍선양
• 안정철
• 김상현
• 세이노히로시

Assignees

• 삼성에스디아이 주식회사

Dates

Publication Date

20260513

Application Date

20241106

Claims (20)

1. An electrode assembly comprising a first electrode having a first electrode tab formed thereon, a second electrode having a second electrode tab formed thereon, and a separator disposed between the first electrode and the second electrode; and A case accommodating the above electrode assembly Includes, The above case is, A body comprising a receiving portion having one end open in a first direction to accommodate the electrode assembly and a flange portion extending from the open end along a direction different from the first direction; and It includes a cover coupled to the flange portion to seal the open end of the receiving portion, and A secondary battery having at least one fixed portion formed on the flange portion and the edge of the cover.
2. In Article 1, A secondary battery in which at least one fixed part is integrally formed with the case.
3. In Article 1, A secondary battery comprising at least one fixed portion including a through hole formed through the flange portion and the cover.
4. In Article 1, A secondary battery comprising at least one fixed portion including an end formed by protruding diagonally from the center of the cover.
5. In Paragraph 4, A secondary battery having a rectangular shape at the end portion.
6. In Article 1, The above body and the above cover are, A secondary battery comprising an outer layer exposed to the outside, a metal layer in contact with the outer layer, and an inner layer in contact with the metal layer.
7. In Article 6, A secondary battery comprising at least one of aluminum (Al) or stainless steel (SUS).
8. In Article 6, A secondary battery comprising the inner layer of the body and the inner layer of the cover, wherein the inner layer comprises unoriented polypropylene (Casted Polypropylene).
9. In Article 8, A secondary battery in which the flange portion and the cover are joined through thermal fusion between the inner layer of the body and the inner layer of the cover.
10. Secondary battery; and Housing to which the above secondary battery is coupled Includes, The above secondary battery is, An electrode assembly comprising a first electrode having a first electrode tab formed thereon, a second electrode having a second electrode tab formed thereon, and a separator disposed between the first electrode and the second electrode; and A case accommodating the above electrode assembly Includes, The above case is, A body comprising a receiving portion having one end open in a first direction to accommodate the electrode assembly and a flange portion extending from the open end along a direction different from the first direction; and It includes a cover coupled to the flange portion to seal the open end of the receiving portion, and An electronic device having at least one fixed portion formed on the flange portion and the edge of the cover.
11. In Article 10, The above housing includes a groove in which the secondary battery is placed—the shape of the groove corresponds to the shape of the secondary battery—and The above-mentioned groove includes at least one fastening portion to which a fixing member is fastened, and An electronic device in which at least one fixing part of the above secondary battery is coupled to at least one fastening part through the fixing member.
12. In Article 10, The above housing includes a guide portion protruding from the housing—the shape of the guide portion corresponds to the shape of the edge of the secondary battery, and the secondary battery is disposed inside the guide portion—, On the housing inside the guide part, at least one fastening part is formed to which a fixing member is fastened, and An electronic device in which at least one fixing part of the above secondary battery is coupled to at least one fastening part through the fixing member.
13. In Article 12, An electronic device having a frame having a shape corresponding to the shape of the flange portion and the at least one fixed portion of the secondary battery disposed on the secondary battery.
14. In Article 10, An electronic device in which at least one fixed part is integrally formed with the case.
15. In Article 10, An electronic device comprising at least one fixed portion including a through hole formed through the flange portion and the cover.
16. In Article 10, An electronic device comprising at least one fixed portion including an end portion formed by protruding diagonally from the center of the cover.
17. In Article 10, The above body and the above cover are, An electronic device comprising an outer layer exposed to the outside, a metal layer in contact with the outer layer, and an inner layer in contact with the metal layer.
18. In Article 17, An electronic device in which the metal layer comprises at least one of aluminum or stainless steel.
19. In Article 17, An electronic device comprising the inner layer of the body and the inner layer of the cover, wherein the inner layer comprises unoriented polypropylene.
20. In Article 19, An electronic device in which the flange portion and the cover are joined through thermal fusion between the inner layer of the body and the inner layer of the cover.

Description

Secondary battery and electronic device including the same The present invention relates to a secondary battery and an electronic device including the same. Specifically, it relates to a secondary battery that is easily detachable and an electronic device including the same. 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 energy 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. Due to changes in component layout design and the demand for lightweighting following the launch of new models, pouch-type batteries, which offer excellent flexibility and are relatively light, are widely used in the secondary battery market. Separate fastening components, such as tape or screw tabs, are required to attach and detach pouch-type batteries to electronic devices. When using tape, wrinkles or deformation often occur on the exterior of the pouch during detachment, and problems arise such as the battery being damaged due to detachment from the device caused by weak adhesive strength. Using screw tabs results in increased manufacturing costs and production time due to the addition of separate components and processes. 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 invention. FIG. 2 is a drawing showing a case of a secondary battery according to some embodiments of the present invention. FIG. 3 is a schematic diagram showing a part of an electronic device including a secondary battery according to some embodiments of the present invention. FIG. 4 is a schematic diagram showing a part of an electronic device including a secondary battery according to some embodiments of the present invention. FIG. 5 is a schematic diagram showing an electronic device including a secondary battery according to some embodiments of the present invention. FIGS. 6 to 8 are drawings for explaining a method for manufacturing a secondary battery according to an embodiment of the present invention. FIG. 9 is a flowchart illustrating a method for manufacturing an electronic device according to one embodiment of the present invention. 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, d