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KR-20260063709-A - SECONDARY BATTERY

KR20260063709AKR 20260063709 AKR20260063709 AKR 20260063709AKR-20260063709-A

Abstract

The present disclosure provides a secondary battery capable of preventing defects in which an electrode assembly detaches from a case (e.g., the electrode assembly popping out of the case) during the battery manufacturing process, as well as preventing the electrode assembly from moving out of the case after the battery manufacturing process is completed. To this end, the present disclosure provides a secondary battery comprising: a case having a sealing area provided along its perimeter; an electrode assembly accommodated in the case; and an adhesive member bonded to the case and the electrode assembly, wherein at least a portion of the adhesive member is bonded to the sealing area.

Inventors

  • 송호진
  • 이제현
  • 송정연

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260507
Application Date
20241031

Claims (20)

  1. A case in which a sealing area is provided along the perimeter; An electrode assembly accommodated in the above case; and It includes an adhesive member that is bonded to the above case and the above electrode assembly, and A secondary battery, wherein at least a portion of the adhesive member is bonded to the sealing area.
  2. In paragraph 1, The above case is, A first case covering one side of the electrode assembly; and It includes a second case covering the other side of the electrode assembly, and The above sealing area is, A lateral sealing portion provided in which the first and second cases are sealed in an area corresponding to the lateral side of the electrode assembly; and A secondary battery comprising a front sealing portion in which the first and second cases are sealed in an area corresponding to the front side of the electrode assembly.
  3. In paragraph 2, A secondary battery in which at least a portion of the adhesive member is coupled to the lateral sealing portion.
  4. In paragraph 3, A secondary battery in which at least a portion of the adhesive member extends to the outer side of the lateral side of the electrode assembly and is coupled to the lateral sealing portion.
  5. In paragraph 2, A secondary battery in which the adhesive member extends to lateral sealing portions on both opposing sides centered on the electrode assembly.
  6. In paragraph 2, A secondary battery, wherein the adhesive member extends to one of the lateral sealing portions on both opposing sides centered on the electrode assembly.
  7. In paragraph 2, A secondary battery in which the vertical width of the adhesive member is equal to or smaller than the vertical width of the electrode assembly.
  8. In paragraph 2, A secondary battery in which the width of the area of the adhesive member that is coupled to the lateral sealing portion is equal to or smaller than the width of the lateral sealing portion.
  9. In paragraph 2, A secondary battery, wherein at least a portion of the adhesive member is bonded to the front sealing portion.
  10. In Paragraph 9, A secondary battery in which at least a portion of the adhesive member extends to the outer side of the front side of the electrode assembly and is coupled to the front sealing portion.
  11. In paragraph 2, The above adhesive member extends from the central region of the front side of the electrode assembly to the front sealing portion, in a secondary battery.
  12. In paragraph 2, The above adhesive member extends to the front sealing portion in the front side regions on both sides facing each other, centered on the electrode assembly, in a secondary battery.
  13. In paragraph 2, The above adhesive member extends from the center of the front side of the electrode assembly and at least one side to the front sealing portion, in a secondary battery.
  14. In paragraph 2, A secondary battery in which the width of the area of the adhesive member that is coupled to the front sealing portion is equal to or smaller than the width of the front sealing portion.
  15. In paragraph 2, The electrode assembly comprises a first substrate tab extending through the front side, a first cell tab welded to the first substrate tab, a second substrate tab extending through the front side, and a second cell tab welded to the second substrate tab, wherein the first cell tab and the second cell tab extend to the outside of the case through the front sealing portion, a secondary battery.
  16. In paragraph 15, A secondary battery, wherein the adhesive member is bonded to a portion of the front sealing portion spaced apart from the first cell tab and the second cell tab.
  17. In paragraph 15, A secondary battery having a first insulating tape interposed between the first cell tab and the front sealing portion, a second insulating tape interposed between the second cell tab and the front sealing portion, and an adhesive member spaced apart from the first insulating tape and the second insulating tape.
  18. In paragraph 15, A secondary battery in which a first insulating tape is interposed between the first cell tab and the front sealing portion, a second insulating tape is interposed between the second cell tab and the front sealing portion, and the adhesive member overlaps the first insulating tape and the second insulating tape.
  19. In paragraph 2, The above adhesive member is coupled to the lateral sealing portion and the front sealing portion on both sides facing each other with respect to the electrode assembly, in a secondary battery.
  20. In paragraph 2, A secondary battery, wherein a portion of the adhesive member extends to the outer side of the lateral side of the electrode assembly and is coupled to the lateral sealing portion, and another portion of the adhesive member extends to the outer side of the front side of the electrode assembly and is coupled to the front sealing portion.

Description

Secondary Battery The present disclosure relates to 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. 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 plan view illustrating a secondary battery according to one embodiment of the present invention. Figure 2 is an exploded perspective view of the secondary battery shown in Figure 1, flipped over. Figure 3 is a cross-sectional view taken along line 3-3 of Figure 1. Figure 4 is a cross-sectional view taken along line 4-4 of Figure 1. Figure 5 is a cross-sectional view taken along line 5-5 of Figure 1. FIGS. 6 to 11 are schematic diagrams illustrating a method for manufacturing a secondary battery according to one embodiment of the present invention. FIGS. 12 to 16 are schematic diagrams illustrating a method for manufacturing a secondary battery according to one embodiment of the present invention. FIGS. 17 to 27 are plan views illustrating the bonding positions of various adhesive members in a method for manufacturing a secondary battery according to one embodiment of the present invention. FIGS. 28 and FIGS. 29 are perspective views illustrating a battery pack according to one embodiment of the present invention. FIGS. 30 and FIGS. 31 are a perspective view and a side view illustrating a vehicle body and a vehicle body part according to an 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, 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 are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component. Throughout the specification, unless specifically stated otherwise, each component may be singular or plural. The fact that any configuration is placed on the "upper (or lower)" of a component or on the