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KR-20260063448-A - A FIRE-RETARDANT ASSEMBLY, AND A BATTERY ASSEMBLY COMPRISING THE SAME

KR20260063448AKR 20260063448 AKR20260063448 AKR 20260063448AKR-20260063448-A

Abstract

The present disclosure relates to a fire-resistant assembly and a battery assembly including the same. A fire-resistant assembly according to one embodiment comprises a fire-resistant member comprising a fire-resistant material; and an outer material that accommodates the fire-resistant member inside; wherein the fire-resistant material may include vermiculite.

Inventors

  • 한규현
  • 나채원
  • 노윤주
  • 이강우
  • 황원갑

Assignees

  • 에스케이온 주식회사

Dates

Publication Date
20260507
Application Date
20241030

Claims (18)

  1. A refractory member comprising a refractory material; and It includes an exterior material that accommodates the above-mentioned fire-resistant member inside; and The above refractory material is a refractory assembly containing vermiculite.
  2. In Article 1, The above-mentioned refractory member is, Refractory assembly containing expanded vermiculite.
  3. In Article 1, The above-mentioned refractory member is, Refractory assembly containing multiple vermiculite particles.
  4. In Paragraph 3, A refractory assembly having an average particle size of the plurality of vermiculite particles of the above, ranging from 2 μm to 5 mm.
  5. In Article 1, The above exterior material is, A refractory assembly that begins to melt when a preset temperature is reached, wherein the temperature is lower than the melting point of the refractory member.
  6. In Article 1, A fire-resistant assembly in which the filling rate of the fire-resistant member within the above exterior material is 90% to 99.9%.
  7. In Article 1, A refractory assembly having a weight of 3g to 5g.
  8. Multiple stacked battery cells; A receiving case accommodating the above plurality of battery cells; An insertion space formed between the plurality of battery cells and the receiving case; and A fire-resistant assembly disposed in the above-mentioned insertion space; comprising, The above fire-resistant assembly is, A refractory member comprising a refractory material; and It includes an exterior material that accommodates the above-mentioned fire-resistant member inside; and The above refractory material is a battery assembly containing vermiculite.
  9. In Paragraph 8, The above-mentioned refractory member is, Battery assembly containing expanded vermiculite.
  10. In Paragraph 8, The above-mentioned refractory member is, A battery assembly comprising multiple vermiculite particles.
  11. In Article 10, A battery assembly in which the average particle size of the plurality of vermiculite particles is 2 μm or more and 5 mm or less.
  12. In Paragraph 8, The above exterior material is, A battery assembly that begins to melt when a preset temperature is reached, wherein the temperature is lower than the melting point of the refractory material.
  13. In Paragraph 8, A battery assembly in which the filling rate of the fire-resistant member within the above exterior material is 90% to 99.9%.
  14. In Paragraph 8, A battery assembly having a weight of 3g to 5g for the above-mentioned fire-resistant assembly.
  15. In Paragraph 8, The height of the above exterior material is, A battery assembly longer than the maximum length of one cross-section of the exterior material along a direction perpendicular to the height of the exterior material.
  16. In Paragraph 8, The above exterior material is a battery assembly having a cylindrical shape or a polyhedral shape.
  17. In Paragraph 8, The above battery assembly is, It further includes a busbar electrically connected to the plurality of battery cells mentioned above, and The above insertion space is, A battery assembly located between the above busbar and the above plurality of battery cells.
  18. In Paragraph 8, The above insertion space is, A first insertion space formed between the plurality of battery cells and one side of the receiving case extending along the stacking direction of the plurality of battery cells; and A second insertion space formed between the plurality of battery cells and the other side of the receiving case facing one side of the receiving case; The above fire-resistant assembly is, A battery assembly disposed in at least one of the first insertion space and the second insertion space.

Description

A fire-retardant assembly and a battery assembly comprising the same The present disclosure relates to a fire-resistant assembly and a battery assembly comprising the same. Specifically, it relates to a fire-resistant assembly inserted into a battery assembly to improve the thermal stability of the battery assembly and a battery assembly comprising the same. Social concerns regarding the safety of battery usage are rising due to recent fires and explosions involving lithium-ion batteries. Based on these concerns, one of the key development challenges for lithium-ion batteries is to eliminate safety risks, such as fires and explosions caused by thermal runaway in battery cells. In particular, battery modules and battery packs, which are examples of battery assemblies, contain empty spaces other than the battery cells that serve as the energy source. If a fire occurs due to external impact or a problem with the battery cells themselves, flames can spread to adjacent cells through these empty spaces, potentially exacerbating the damage caused by the fire. Since this risk of fire can be the biggest obstacle to the development of the electric vehicle market, research is continuously being conducted to devise methods to reduce fire propagation. FIG. 1 is a drawing showing an example of a fire-resistant assembly according to one embodiment of the present disclosure. Figure 2 is a drawing showing a cross-sectional view of the fire-resistant assembly of Figure 1. FIG. 3 is a drawing showing another example of a fire-resistant assembly according to one embodiment of the present disclosure. FIG. 4 is a drawing showing an example of a battery assembly according to one embodiment of the present disclosure. FIG. 5 is a drawing showing an example of a disassembled view of a battery assembly according to one embodiment of the present disclosure. FIG. 6 is a drawing showing an example of a battery assembly viewed from above according to one embodiment of the present disclosure. Figure 7 is an enlarged view of the S1 portion of Figure 6. FIG. 8 is a schematic diagram showing an example of a fire-resistant assembly accommodated in an insertion space viewed from above. FIG. 9 is a drawing showing a cross-sectional view from above of an example of a battery assembly according to one embodiment of the present disclosure. FIG. 10 is a drawing showing an example of a battery assembly according to one embodiment of the present disclosure, viewed from one side. FIG. 11 is a drawing illustrating an example of a battery assembly according to another embodiment of the present disclosure. FIG. 12 is an image showing a fire-resistant assembly manufactured according to an example. Figure 13 is an image showing the results of a fire retardation performance evaluation using fire-resistant assemblies manufactured according to a comparative example. Figure 14 is an image showing the results of a fire retardation performance evaluation using fire-resistant assemblies manufactured according to an example. Since the embodiments described in this specification may be modified in various different forms, the technology according to one embodiment is not limited to the embodiments described below. Furthermore, throughout the specification, the terms "comprising," "having," "containing," or "having" any component do not exclude other components but may include additional components unless specifically stated otherwise, and do not exclude elements, materials, or processes not additionally listed. In this specification, "identical or uniform" may mean that they are identical or uniform to one another within an acceptable margin of error, unless otherwise specified. For example, the statement that certain components or physical property measurements are identical may include not only that the two objects being compared are completely identical, but also that they are identical within a margin of error. Meanwhile, the statement that certain physical property measurements are identical may mean that the difference between the measurements between the objects is approximately less than 5%, specifically less than 3%, and more specifically less than 1%. In this specification, the statement that the angle formed by two objects is perpendicular or parallel to each other includes not only geometrically perpendicular or parallel but also angles within a slight margin of error. The numerical ranges used in this specification include lower and upper limits and all values within the range, increments logically derived from the form and width of the defined range, all of which are limited values, and all possible combinations of upper and lower limits of numerical ranges limited in different forms. Unless otherwise specifically defined in this specification, “about” may be considered to be a value within 30%, 25%, 20%, 15%, 10%, or 5% of the specified value. In this specification, "X-direction," "Y-direction," and "Z-direction" may be described based on a spatial o