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KR-20260064095-A - ELECTRODE ASSEMBLY AND SECONDARY BATTERY COMPRISING THE SAME

KR20260064095AKR 20260064095 AKR20260064095 AKR 20260064095AKR-20260064095-A

Abstract

An electrode assembly according to an embodiment includes a first electrode portion, a second electrode portion, and a third electrode portion, wherein the third electrode portion is disposed between the first electrode portion and the second electrode portion, and the first electrode portion, the second electrode portion, and the third electrode portion each include a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, and at least one of the first electrode plate and the second electrode plate includes a non-electrode portion, and the non-electrode portions of the first electrode portion, the second electrode portion, and the third electrode portion do not overlap in the thickness direction of the electrode portions.

Inventors

  • 고재욱

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260507
Application Date
20241031

Claims (20)

  1. It includes a first electrode part, a second electrode part and a third electrode part, and The third electrode portion is disposed between the first electrode portion and the second electrode portion, and The first electrode portion, the second electrode portion, and the third electrode portion each include a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, and At least one of the first electrode plate and the second electrode plate includes a non-porous portion, and An electrode assembly in which the unoccupied portions of the first electrode portion, the second electrode portion, and the third electrode portion do not overlap in the thickness direction of the electrode portions.
  2. In Article 1, The first electrode portion includes a 1a non-solid portion of the first electrode plate and a 2a non-solid portion of the second electrode plate, and The second electrode portion includes a 1b unoccupied portion of the first electrode plate and a 2b unoccupied portion of the second electrode plate, and The third electrode portion includes the 1c non-existent portion of the first electrode plate and the 2c non-existent portion of the second electrode plate, and The above-mentioned 1a unincorporated portion, the above-mentioned 1b unincorporated portion, and the above-mentioned 1c unincorporated portion do not overlap in the thickness direction of the electrode portion, An electrode assembly in which the above-mentioned 2a non-existent portion, the above-mentioned 2b non-existent portion, and the above-mentioned 2c non-existent portion do not overlap in the thickness direction of the electrode portion.
  3. In Article 1, The thicknesses of the first electrode part, the second electrode part, and the third electrode part are different in the electrode assembly.
  4. In Paragraph 3, An electrode assembly in which the thickness of the third electrode portion is greater than the thickness of the first electrode portion and the second electrode portion.
  5. In Paragraph 2, The above 1a unoccupied portion and the above 2a unoccupied portion are offset in the width direction of the electrode plate, and The above 1b unoccupied portion and the above 2b unoccupied portion are offset in the width direction of the electrode plate, and The above 1c unoccupied portion and the above 2c unoccupied portion are electrode assemblies that are offset in the width direction of the electrode plate.
  6. In Paragraph 2, The above 1a unoccupied portion and the above 2a unoccupied portion are offset in the width direction of the electrode plate, and The above 1b unoccupied portion and the above 2b unoccupied portion are offset in the width direction of the electrode plate, and The above 1c unoccupied portion and the above 2c unoccupied portion are electrode assemblies that overlap in the width direction of the electrode plate.
  7. In Article 1, An electrode assembly in which the number of unoccupied portions of the third electrode part is greater than the number of unoccupied portions of the first electrode part and the second electrode part.
  8. In Article 1, The first electrode portion includes a 1a non-solid portion of the first electrode plate and a 2a non-solid portion of the second electrode plate, and The second electrode portion includes a 1b unoccupied portion of the first electrode plate and a 2b unoccupied portion of the second electrode plate, and The third electrode portion includes the 1c non-existent portion of the first electrode plate and the 2c non-existent portion of the second electrode plate, and The number of the above 2a uninhibited parts is greater than the number of the above 1a uninhibited parts, and The number of the above 2b uninhibited parts is greater than the number of the above 1b uninhibited parts, and The number of the above 2c unoccupied portions is greater than the number of the above 1c unoccupied portions in an electrode assembly.
  9. In Article 1, The first electrode portion, the second electrode portion, and the third electrode portion each include a first non-porous portion of the first electrode plate and a second non-porous portion of the second electrode plate, and An electrode assembly in which the width of the second non-restricted portion is greater than the width of the first non-restricted portion.
  10. In Article 1, The first electrode portion, the second electrode portion, and the third electrode portion each include a first non-porous portion of the first electrode plate and a second non-porous portion of the second electrode plate, and An electrode assembly in which the length of the second unoccupied portion is longer than the length of the first unoccupied portion.
  11. In Article 1, The first electrode portion, the second electrode portion, and the third electrode portion each include a first non-porous portion of the first electrode plate and a second non-porous portion of the second electrode plate, and An electrode assembly in which the width of the unoccupied portion of the third electrode part is larger than the width of the unoccupied portions of the first electrode part and the second electrode part.
  12. In Paragraph 11, A secondary battery in which the width of the non-existent portion of the third electrode part increases toward the center of the third electrode part.
  13. In Article 1, The first electrode portion, the second electrode portion, and the third electrode portion each include a first non-porous portion of the first electrode plate and a second non-porous portion of the second electrode plate, and An electrode assembly in which the length of the unoccupied portion of the third electrode part is longer than the length of the unoccupied portion of the first electrode part and the second electrode part.
  14. In Paragraph 13, A secondary battery in which the length of the unoccupied portion of the third electrode part increases toward the center of the third electrode part.
  15. In Article 1, The electrode plates of the first electrode part, the second electrode part, and the third electrode part each comprise a plurality of uninsulated parts, forming an electrode assembly.
  16. In Paragraph 15, The first electrode portion comprises a plurality of 1a unoccupied portions of the first electrode plate and a plurality of 2a unoccupied portions of the second electrode plate, and The second electrode portion comprises a plurality of 1b unoccupied portions of the first electrode plate and a plurality of 2b unoccupied portions of the second electrode plate, and The above third electrode part is an electrode assembly comprising a plurality of 1c unoccupied portions of the first electrode plate and a plurality of 2c unoccupied portions of the second electrode plate.
  17. In Paragraph 16, The number of the above 1c uninhibited parts is greater than the number of the above 1a uninhibited parts and the above 1b uninhibited parts, and An electrode assembly in which the number of the above 2c unoccupied portions is greater than the number of the above 2a unoccupied portions and the above 2b unoccupied portions.
  18. In Paragraph 16, The size of the above 1c unworn portion is larger than the size of the above 1a unworn portion and the above 1b unworn portion, and An electrode assembly in which the size of the above 2c non-existent portion is larger than the size of the above 2a non-existent portion and the above 2b non-existent portion.
  19. In Paragraph 16, The above-mentioned 1a non-retaining portion, the above-mentioned 1b non-retaining portion, and the above-mentioned 1c non-retaining portion are disposed at the upper and lower portions of the first electrode plate and at the center between the upper portion and the lower portion, and The above 2a non-removable portion, the above 2b non-removable portion, and the above 2c non-removable portion are electrode assemblies disposed at the upper and lower portions of the second electrode plate and at the center between the upper portion and the lower portion.
  20. case; An electrode assembly of any one of claims 1 to 19 accommodated in the above case; A terminal electrically connected to the unseen portion of the electrode assembly; and A secondary battery comprising a cap assembly that seals the opening of the above case

Description

Electrode assembly and secondary battery comprising the same The embodiments relate to an electrode assembly and a secondary battery 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 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 perspective view of a secondary battery according to an embodiment. Figure 2 is a cross-sectional view of the AA' region of Figure 1. FIG. 3 is a side view of an electrode assembly according to an embodiment. FIG. 4 is a diagram illustrating the unincorporated portion according to the position of the electrode portion according to an embodiment. FIGS. 5 to 7 are top views of an electrode assembly according to an embodiment. FIG. 8 is a diagram illustrating a non-existent portion according to the position of the electrode portion according to another embodiment. FIGS. 9 to 16 are top views of an electrode assembly according to another embodiment. FIG. 17 is a drawing illustrating a non-existent portion according to the position of the electrode portion according to another embodiment. FIG. 18 is a perspective view of a battery module including secondary batteries according to an embodiment. FIGS. 19 and 20 are perspective views of a battery pack including a battery module according to an embodiment. FIGS. 21 and FIGS. 22 are a perspective view and a side view of a vehicle including a battery pack according to an embodiment. Preferred embodiments of the present disclosure 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, but should be interpreted in a meaning and concept consistent with the technical spirit of the present disclosure, based on the principle that the inventor may appropriately define the concept of the terms to best describe his invention. Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present disclosure and do not represent all of the technical spirit of the present disclosure; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Furthermore, as used in this specification, "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, when describing embodiments of the present disclosure, "may" or "may be" may include "one or more embodiments of the present disclosure." 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.