US-20260128426-A1 - SECONDARY BATTERY AND ELECTRONIC DEVICE INCLUDING SAME

Abstract

A secondary battery according to embodiments of the present disclosure includes an electrode assembly including a first electrode in which a first electrode tab is formed, a second electrode in which a second electrode tab is formed, and a separator interposed between the first electrode and the second electrode, and a case configured to accommodate the electrode assembly, wherein the case includes a body including an accommodation part with one end opened in a first direction to accommodate the electrode assembly and a flange part extended from the opened one end along a direction different from the first direction, and a cover coupled to the flange part to seal the opened one end of the accommodation part, and wherein an edge of the flange part and the cover include a fixing part.

Inventors

• Sunyang Hong
• Jeongchull AHN
• Sanghyun Kim
• Hiroshi Seino

Assignees

• SAMSUNG SDI CO., LTD.

Dates

Publication Date

20260507

Application Date

20250915

Priority Date

20241106

Claims (20)

1. 1 . A secondary battery, comprising: 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 interposed between the first electrode and the second electrode; and a case configured to accommodate the electrode assembly, wherein the case comprises: a body comprising an accommodation part with opened one end in a first direction to accommodate the electrode assembly and a flange part extended from the opened one end along a direction different from the first direction; and a cover coupled to the flange part to seal the opened one end of the accommodation part, and wherein an edge of the flange part and the cover include at least one fixing part.
2. 2 . The secondary battery as claimed in claim 1 , wherein the at least one fixing part is integrally formed with the case.
3. 3 . The secondary battery as claimed in claim 1 , wherein the at least one fixing part comprises a through hole penetrating the flange part and the cover.
4. 4 . The secondary battery as claimed in claim 1 , wherein the at least one fixing part comprises an end portion protruding diagonally from a center of the cover.
5. 5 . The secondary battery as claimed in claim 4 , wherein the end portion has a square shape.
6. 6 . The secondary battery as claimed in claim 1 , wherein the body and the cover comprise an outer layer exposed to an outside, a metal layer contacting the outer layer, and an inner layer contacting the metal layer.
7. 7 . The secondary battery as claimed in claim 6 , wherein the metal layer comprises at least one of Aluminum (Al) or stainless steel (SUS).
8. 8 . The secondary battery as claimed in claim 6 , wherein the inner layer of the body and the inner layer of the cover comprise Casted Polypropylene.
9. 9 . The secondary battery as claimed in claim 8 , wherein the flange part and the cover are bonded via heat fusion between the inner layer of the body and the inner layer of the cover.
10. 10 . An electronic device, comprising: a secondary battery; and a housing coupled to a secondary battery, wherein the secondary battery comprises: 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 interposed between the first electrode and the second electrode; and a case configured to accommodate the electrode assembly, wherein the case comprises: a body comprising an accommodation part with opened one end in a first direction to accommodate the electrode assembly, and a flange part extended from the opened one end along a direction different from the first direction; and a cover coupled to the flange part to seal the opened one end of the accommodation part, and wherein an edge of the flange part and the cover include at least one fixing part.
11. 11 . The electronic device as claimed in claim 10 , wherein the housing comprises a groove part for receiving the secondary battery, wherein a shape of the groove part corresponds to a shape of the secondary battery, wherein the groove part comprises at least one coupling part coupled to a fixing member, and wherein the at least one fixing part of the secondary battery is coupled to the at least one coupling part via the fixing member.
12. 12 . The electronic device as claimed in claim 10 , wherein the housing comprises a guide part protruding from the housing, wherein a shape of the guide part corresponds to a shape of an edge of the secondary battery, wherein the secondary battery is for being placed inside the guide part, wherein at least one fixing part coupled to a fixing member is on the housing inside the guide part, and wherein the at least one fixing part of the secondary battery is coupled to the at least one coupling part via the fixing member.
13. 13 . The electronic device as claimed in claim 12 , wherein the electronic device further comprises a frame placed on the secondary battery, the frame having a shape corresponding to a shape of the flange part and the at least one fixing part of the secondary battery.
14. 14 . The electronic device as claimed in claim 10 , wherein the at least one fixing part is integrally formed with the case.
15. 15 . The electronic device as claimed in claim 10 , wherein the at least one fixing part comprises a through hole penetrating the flange part and the cover.
16. 16 . The electronic device as claimed in claim 10 , wherein the at least one fixing part comprises an end portion diagonally protruding from a center of the cover.
17. 17 . The electronic device as claimed in claim 10 , wherein the body and the cover comprise an outer layer exposed to an outside, a metal layer contacting the outer layer, and an inner layer contacting the metal layer.
18. 18 . The electronic device as claimed in claim 17 , wherein the metal layer comprises at least one of Aluminum or stainless steel.
19. 19 . The electronic device as claimed in claim 17 , wherein the inner layer of the body and the inner layer of the cover comprise Casted Polypropylene.
20. 20 . The electronic device as claimed in claim 19 , wherein the flange part is bonded to the cover via heat fusion between the inner layer of the body and the inner layer of the cover.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to and the benefit of Korean Patent Application No. 10-2024-0156214, filed on Nov. 6, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1. Field The present disclosure relates to a secondary battery and an electronic device including the same, and more particularly, to a removable secondary battery and an electronic device including the same. 2. Description of the Related Art Unlike primary batteries that are not designed to be (re)charged, secondary (or rechargeable) batteries are batteries that are designed to be discharged and recharged. Low-capacity secondary batteries are used in portable, small electronic devices, such as smart phones, feature phones, notebook computers, digital cameras, and camcorders, while large-capacity secondary batteries are widely used as power sources for driving motors in hybrid vehicles and electric vehicles and for storing power (e.g., home and/or utility scale power storage). A secondary battery generally includes an electrode assembly composed of a positive electrode and a negative electrode, a case accommodating the same, and electrode terminals connected to the electrode assembly. Pouch-type secondary batteries that are flexible and light weight may be available due to changes in the component layout design and demands for lighter weight batteries as new models are launched. A separate fixing component such as a tape or a screw tab may be used for attaching or detaching the pouch-type battery to or from the electronic device. When a tape is used, wrinkles or deformations may occur in the exterior of the pouch when the tape is detached. Other problems may arise such as the battery being damaged due to the detachment from the electronic device because of weak adhesion provided by the tape. When a screw tab is used, separate components or processes are added, which generally increase the manufacturing cost and the production time. The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure, and therefore, it may contain information that does not constitute related (or prior) art. SUMMARY One or more embodiments of the present disclosure provide a secondary battery and an electronic device including the same. These and other aspects and features of the present disclosure will be described in or will be apparent from the following description of embodiments of the present disclosure. However, aspects and features of the present disclosure are not limited to those described above, and other aspects and features not mentioned will be clearly understood by a person skilled in the art from the detailed description, described below. According to some embodiments of the present disclosure, there is provided a secondary battery including an electrode assembly including a first electrode in which a first electrode tab is formed, a second electrode in which a second electrode tab is formed, and a separator interposed between the first electrode and the second electrode, and a case configured to accommodate the electrode assembly, wherein the case includes a body including an accommodation part with one end opened in a first direction to accommodate the electrode assembly and a flange part extended from the opened one end along a direction different from the first direction, and a cover coupled to the flange part to seal the opened one end of the accommodation part, wherein an edge of the flange part and the cover include a fixing part. The at least one fixing part may be integrally formed with the case. The at least one fixing part may include a through hole penetrating the flange part and the cover. The at least one fixing part may include an end portion protruding diagonally from a center of the cover. The end portion may have a square shape. The body and the cover may include an outer layer that is exposed to an outside, a metal layer contacting the outer layer, and an inner layer contacting the metal layer. The metal layer may include at least one of Aluminum (Al) or stainless steel (SUS). The inner layer of the body and the inner layer of the cover may include Casted Polypropylene. The flange part and the cover may be bonded through heat fusion between the inner layer of the body and the inner layer of the cover. According to some embodiments of the present disclosure, there is provided an electronic device including an secondary battery, and a housing coupled to the secondary battery, wherein the secondary battery includes an electrode assembly including a first electrode in which a first electrode tab is formed, a second electrode in which a second electrode tab is formed, and a separator interposed between the first electrode and the second electrode, and a case configured to accommodate the electrode assembly, wherein the case includes a body