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KR-20260062613-A - BATTERY MODULE

KR20260062613AKR 20260062613 AKR20260062613 AKR 20260062613AKR-20260062613-A

Abstract

The present disclosure relates to a battery module comprising: a cell assembly including a plurality of battery cells stacked along a first direction; a module case defining a module space in which the cell assembly is accommodated; and an insulating member disposed between the cell assembly and the module case. In the insulating member, a plurality of slit holes may be formed, arranged along the first direction, each extending along a second direction that intersects the first direction.

Inventors

  • 서정명
  • 정주영
  • 최근우

Assignees

  • 에스케이온 주식회사

Dates

Publication Date
20260507
Application Date
20241029

Claims (15)

  1. A cell assembly comprising a plurality of battery cells stacked along a first direction; A module case defining a module space in which the above cell assembly is accommodated; and Including an insulating member disposed between the cell assembly and the module case; A battery module having: a plurality of slit holes formed in the insulating member, each arranged along the first direction and extending along a second direction that intersects the first direction.
  2. In paragraph 1, A battery module in which the length of each of the plurality of slit holes in the second direction is 55% or more and 85% or less of the length of the insulating member in the second direction.
  3. In paragraph 1, A battery module in which the length of each of the plurality of slit holes in the first direction is 0.15 mm or more and 0.25 mm or less.
  4. In paragraph 1, The above module case includes a body bottom surface that defines the bottom surface of the module space, and The above insulating member is a battery module disposed on the body bottom surface.
  5. In paragraph 4, A battery module further comprising an adhesive member disposed on the insulating member to fill each of the plurality of slit holes.
  6. In paragraph 5, A battery module in which the length in the first direction of each of the plurality of slit holes is smaller than the length in the first direction of the protrusion of the adhesive member protruding above each of the plurality of slit holes.
  7. In paragraph 5, A battery module in which the plurality of battery cells are arranged to overlap with each of the plurality of slit holes.
  8. In Paragraph 7, A battery module in which the adhesive member is disposed between the plurality of battery cells and the body bottom surface exposed by the plurality of slit holes.
  9. In paragraph 4, A battery module having: a plurality of first through holes arranged along the first direction; and a plurality of second through holes arranged along the first direction and spaced apart from the plurality of first through holes in the second direction with the insulating member in between, on the body bottom surface.
  10. In Paragraph 9, A first side insulating member disposed on the body bottom surface and overlapping with the plurality of first through holes; and A battery module comprising a second side insulating member disposed on the body bottom surface, overlapping with the plurality of second through holes, and spaced apart from the first side insulating member in the second direction.
  11. In Paragraph 10, A battery module in which at least a portion of the insulating member overlaps with the first side insulating member and the second side insulating member, respectively.
  12. In paragraph 1, The cell assembly comprises: a first end plate; and a second end plate spaced apart from the first end plate in the first direction so as to place the plurality of battery cells between them, in a battery module.
  13. In Paragraph 12, A battery module in which at least a portion of the insulating member overlaps with the first end plate and the second end plate, respectively.
  14. In paragraph 1, The above insulating member comprises: an adhesive layer; and an insulating material layer disposed on the adhesive layer, wherein the battery module.
  15. In paragraph 1, The above-described module case comprises: a module body having an opening with at least one side open; and a module cover coupled to the module body to cover the opening, a battery module.

Description

Battery Module The present disclosure relates to a battery module. More specifically, the present disclosure relates to a battery module with improved stability. A battery module may include multiple battery cells and a module case. The module case defines a module space for accommodating multiple battery cells, and the multiple battery cells may be accommodated within this module space. Meanwhile, if the multiple battery cells and the module case come into electrical contact, a problem may arise in which the performance of the multiple battery cells is degraded. Therefore, it is necessary to ensure insulation between the multiple battery cells and the module case. FIG. 1 is a drawing for explaining a battery module according to the present disclosure. FIG. 2 is a drawing for explaining an insulating member and a side insulating member included in a battery module according to the present disclosure. FIG. 3 is a schematic cross-sectional view for explaining the insulating member of FIG. 2. FIG. 4 is a schematic cross-sectional view for explaining the side insulating member of FIG. 2. FIG. 5 is a plan view illustrating an example in which an insulating member and a side insulating member are arranged on the module case of FIG. 2. Figure 6 is a graph illustrating the attachment success rate according to the length in the second direction of each of the multiple slit holes. Figure 7 is a graph illustrating the average number of bubbles according to the length in the second direction of each of the plurality of slit holes. Figure 8 is a plan view showing an enlarged view of the AA area of Figure 5. FIG. 9 is a plan view illustrating an example of an adhesive member included in a battery module according to the present disclosure. Figure 10 is a cross-sectional view taken along the X1-X2 line of Figure 9. FIG. 11 is a plan view showing an enlarged view of the BB area of FIG. 9. Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively. FIG. 1 is a drawing for explaining a battery module according to the present disclosure. Hereinafter, a first direction (X), a second direction (Y), and a third direction (Z) are defined. The first direction (X) may be the direction in which the battery cells (111) described below are stacked. The second direction (Y) may be a direction that intersects (or is perpendicular) the first direction (X). The third direction (Z) may be a direction perpendicular to each of the first direction (X) and the second direction (Y). In one embodiment, the third direction (Z) may be the direction of action of gravity. Referring to FIG. 1, the battery module (1000) may include a cell assembly (100) comprising a plurality of battery cells (111) stacked along a first direction (X), and a module case (200) defining a module space (10) in which the cell assembly (100) is accommodated. In one embodiment, the cell assembly (100) may include a cell stack (110). The cell stack (110) may include a plurality of battery cells (111) stacked along a first direction (X). Here, "battery cell" may be a minimum unit capable of converting chemical energy into electrical energy through an oxidation-reduction reaction at the negative electrode and the positive electrode, comprising a negative electrode and a positive electrode. For example, the "battery cell" may be a lithium secondary battery, but the present disclosure is not limited thereto. In one embodiment, the cell stack (110) may further include an insulating member (112). The insulating member (112) may be placed between two adjacent battery cells among a plurality of battery cells (111). The insulating member (112) may serve to block heat propagation caused by thermal runaway when thermal runaway occurs in any one of the plurality of battery cells (111). In one embodiment, a plurality of insulating members (112) may be provided. In this case, the plurality of insulating members (112) and the plurality of battery cells (111) may be stacked along a first direction (X) according to a predetermined rule. For example, one insulating member (112) may be placed for every two battery cells (111), such as '...insulating member (112)/battery cell (111)/battery cell (111)/insulating member (112)/battery cell (111)/battery cell (111)...'. However, the present disclosure is not limited thereto. For example, one insulating member (112) may be placed for every three or more battery cells (111). In one embodiment, the cell assembly (100) may further include a busbar frame (120). The busbar frame (120) may be coupled to the cell stack (110). The busbar frame (120) may serve to support the cell stack (110). The busbar frame (120) may include a first busbar frame (121) electrically connected to one terminal portion of a plurality of battery cells (111) included in the cell stack (110), and a second b