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KR-20260063300-A - Battery Cell and Battery Module Including the same

KR20260063300AKR 20260063300 AKR20260063300 AKR 20260063300AKR-20260063300-A

Abstract

The present disclosure provides a battery cell comprising: an electrode assembly including a positive plate, a negative plate, and a separator; an electrode lead electrically connected to the electrode assembly; a support member covering at least a portion of the electrode assembly; an elastic member providing elastic force to the support member; and a cell casing housing the electrode assembly, the support member, and the elastic member inside; wherein the support member includes a first support member covering one side of the electrode assembly and a second support member covering the other side of the electrode assembly, and the elastic member provides elastic force to the first support member and the second support member.

Inventors

  • 이승민

Assignees

  • 에스케이온 주식회사

Dates

Publication Date
20260507
Application Date
20241030

Claims (16)

  1. An electrode assembly comprising an anode plate, a cathode plate, and a separator; Electrode leads electrically connected to the above electrode assembly; A support member covering at least a portion of the electrode assembly; An elastic member that provides elastic force to the above-mentioned support member; and A cell casing that accommodates the electrode assembly, the support member, and the elastic member inside; Includes, The above support member includes a first support member covering one side of the electrode assembly and a second support member covering the other side of the electrode assembly. The above elastic member is a battery cell that provides elastic force to the first support member and the second support member.
  2. In claim 1, The first support member covers the upper surface of the electrode assembly, and The second support member covers the lower surface of the electrode assembly, and A battery cell in which the upper and lower surfaces of the electrode assembly are each wider than other surfaces of the electrode assembly.
  3. In claim 1, A battery cell in which at least one of the first support member or the second support member comprises a plurality of through holes.
  4. In claim 3, The above plurality of through holes are battery cells having a grid shape or a honeycomb shape.
  5. In any one of claims 1 to 4, The above elastic member is a battery cell coupled to at least one of the first support member or the second support member.
  6. In any one of claims 1 to 4, The above elastic member is a battery cell comprising a first elastic member disposed at the corner portion of the support member.
  7. In claim 6, A battery cell comprising a second elastic member additionally disposed in an area excluding the corner portion of the edge of the support member, wherein the elastic member is further included.
  8. In any one of claims 1 to 4, A holder member coupled to the outside of the first support member and the second support member so as to suppress deformation of the elastic member; A battery cell that additionally includes
  9. In claim 8, A battery cell in which the inner height of the holder member is 110% to 140% of the thickness of the electrode assembly before expansion.
  10. In claim 8, A battery cell comprising a first holder member that is coupled to the outside of the first support member and the second support member, and is positioned at the corner portion of the support member.
  11. In claim 10, A battery cell comprising a holder member coupled to the outside of the first support member and the second support member, and further comprising a second holder member disposed on the side of the support member.
  12. In any one of claims 1 to 4, The above support member comprises a battery cell having a material having heat resistance of 100°C (degree Celsius) or higher and insulation of 10⁶ Ωm (ohm meter) or higher.
  13. In any one of claims 1 to 4, The above-mentioned support member is a battery cell comprising a material in which a ceramic filler is included in a polymer matrix.
  14. An electrode assembly comprising an anode plate, a cathode plate, and a separator; Electrode leads electrically connected to the above electrode assembly; A support member covering the entire surface of the electrode assembly; and Cell casing that accommodates the electrode assembly and the support member inside Includes, The support member comprises a third support member covering the surface where the electrode lead is located and a fourth support member covering the surface where the electrode lead is not located, wherein The above third support member is a battery cell including an opening formed so that the electrode lead protrudes outward.
  15. In claim 14, A battery cell comprising at least one of the third support member or the fourth support member having a plurality of through holes.
  16. Multiple battery cells; and A module housing comprising the plurality of battery cells mentioned above; and Each of the above plurality of battery cells is An electrode assembly comprising an anode plate, a cathode plate, and a separator; Electrode leads electrically connected to the above electrode assembly; A support member covering at least a portion of the electrode assembly; An elastic member that provides elastic force to the above-mentioned support member; and A cell casing that accommodates the electrode assembly, the support member, and the elastic member inside; Includes, The above support member includes a first support member covering one side of the electrode assembly and a second support member covering the other side of the electrode assembly. The above elastic member is a battery module that provides elastic force to the first support member and the second support member.

Description

Battery cell and battery module including the same The present disclosure relates to a battery cell (secondary battery) including a support member and a battery module including the same. Unlike primary batteries, secondary batteries can be charged and discharged, making them a power source in various fields such as digital cameras, mobile devices, electric vehicles, and energy storage systems (ESS). These secondary batteries come in various types, including lithium-ion batteries, nickel-cadmium batteries, and nickel-metal hydride batteries, and can be manufactured as flexible pouch-type battery cells or rigid can-type battery cells. Can-type battery cells are classified according to their external shape into prismatic battery cells, cylinder battery cells, and coin-type battery cells, and each form can be applied in various ways to suit the devices and environments in which they are used. Multiple battery cells can be formed into a stacked cell assembly. The cell assembly is placed inside a module housing to form a battery module, and multiple battery modules can be placed inside a pack frame to form a battery pack. FIG. 1 is a schematic perspective view illustrating a battery cell according to a first embodiment. FIG. 2 is an exploded perspective view of the battery cell shown in FIG. 1 with the cell casing omitted. FIG. 3 is a perspective view showing the interior of the cell casing of the battery cell shown in FIG. 1. FIG. 4 is a perspective view illustrating the deformation state inside the cell casing shown in FIG. 3. FIG. 5a is a cross-sectional view along line I-I' of FIG. 3, and FIG. 5b is a cross-sectional view along line II-II' of FIG. 4. FIGS. 6a to 6c are plan views illustrating various modified examples in which the cell casing and the first support member of a battery cell according to the first embodiment are omitted. FIG. 7 is a perspective view showing the interior of a cell casing of a battery cell according to a second embodiment. FIG. 8 is a perspective view showing the interior of a cell casing of a battery cell according to a third embodiment. FIG. 9 is a perspective view illustrating the deformation state inside the cell casing shown in FIG. 8. FIG. 10a is a cross-sectional view along the line III-III' of FIG. 8, and FIG. 10b is a cross-sectional view along the line IV-IV' of FIG. 9. FIG. 11 is a perspective view showing the interior of a cell casing of a battery cell according to a fourth embodiment. FIG. 12 is a perspective view showing the interior of a cell casing of a battery cell according to a fifth embodiment. FIG. 13 is an exploded perspective view of a battery cell according to the fifth embodiment with the cell casing omitted. FIG. 14 is an exploded perspective view of a battery module. Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely an example and the present disclosure is not limited to the specific embodiments described illustratively. Identical reference numbers or symbols in each drawing attached to this specification represent parts or components that perform substantially the same function. For convenience of explanation and understanding, the same reference numbers or symbols may be used to describe different embodiments. That is, even if components having the same reference number are depicted in multiple drawings, the multiple drawings do not all represent a single embodiment. In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "comprising" or "constituting" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In addition, it should be noted in advance that in the following description, expressions such as top surface, upper surface, lower surface, lower surface, side surface, front surface, and rear surface are based on the direction depicted in the drawings, and may be expressed differently if the direction of the object changes. Additionally, in this specification and claims, terms including ordinal numbers, such as "first," "second," etc., may be used to distinguish between components. These ordinal numbers are used to distinguish identical or similar components from one another, and the meaning of the terms should not be limited by the use of such ordinal numbers. For example, the order of use or arrangement of components combined with such ordinal numbers should not be limited by the number. If necessary, each ordinal number may be used interchangeably. First, a battery cell (100) according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 and FIGS. 2. FIG. 1 is a schematic perspectiv