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CN-224204180-U - Heat insulation device and battery pack

CN224204180UCN 224204180 UCN224204180 UCN 224204180UCN-224204180-U

Abstract

The utility model provides a heat insulation device and a battery pack, wherein the heat insulation device comprises a phase change layer, the phase change layer comprises at least two first side parts which are arranged at intervals in a first direction, the heat insulation layer is provided with a heat insulation cavity used for filling heat insulation gas, and the heat insulation layer is arranged between two adjacent first side parts. In the embodiment of the utility model, the heat insulation layer is arranged between the two first side parts of the phase change layer, the heat insulation layer is provided with the heat insulation cavity for filling heat insulation gas, the heat insulation gas can prevent heat conduction along the first direction on the basis that the phase change layer absorbs or releases heat autonomously to ensure temperature balance, and meanwhile, the heat insulation layer also has good compression elasticity due to the arrangement of the heat insulation cavity, so that better buffering is provided between the battery cells.

Inventors

  • XIONG XINGXING

Assignees

  • 惠州亿纬锂能股份有限公司

Dates

Publication Date
20260505
Application Date
20250421

Claims (10)

  1. 1. An insulating device (100), characterized by comprising: a phase change layer (110), the phase change layer (110) comprising at least two first sides (111) arranged at intervals in a first direction (X); a heat insulating layer (120) having a heat insulating chamber (120 a) for filling a heat insulating gas; wherein the heat insulating layer (120) is disposed between two adjacent first side portions (111).
  2. 2. The thermal insulation device (100) of claim 1, wherein the thermal insulation layer (120) comprises: a first encapsulation layer (121), wherein the heat insulation cavity (120 a) is formed by wrapping at least the first encapsulation layer (121); Wherein at least part of the first encapsulation layer (121) is located between the insulating cavity (120 a) and the first side (111) in the first direction (X).
  3. 3. The thermal insulation device (100) of claim 2, wherein the phase change layer (110) further comprises: A second side (112) at least partially surrounding the periphery of the insulating cavity (120 a); Wherein, in the first direction (X), the second side (112) is located between two adjacent first sides (111); At least part of the first encapsulation layer (121) is located between the second side (112) and the insulating cavity (120 a) in a second direction (Y), which intersects the first direction (X).
  4. 4. A thermal insulation device (100) according to claim 3, wherein the ratio of the thickness of the second side (112) to the thickness of the first side (111) is in the range of 0.8 to 1.2.
  5. 5. A heat insulating device (100) according to claim 3, wherein the second side portions (112) are connected to the first side portions (111) on both sides in a first direction (X), respectively, such that the first side portions (111) and the second side portions (112) constitute a continuous whole around the heat insulating layer (120).
  6. 6. The thermal insulation device (100) according to any one of claims 1 to 5, wherein the thermal insulation device (100) further comprises: The second packaging layer (130) is at least partially arranged around the first side part (111).
  7. 7. The thermal insulation device (100) of claim 6, wherein the thermal insulation layer (120) comprises: a first encapsulation layer (121), wherein the heat insulation cavity (120 a) is formed by wrapping at least the first encapsulation layer (121); The second packaging layer (130) is arranged on the outer side of the first packaging layer (121), and the phase change layer (110) is packaged between the first packaging layer (121) and the second packaging layer (130).
  8. 8. The heat insulation apparatus (100) according to any one of claims 1 to 5, wherein the ratio of the thickness of the heat insulation chamber (120 a) to the thickness of the first side portion (111) in the first direction (X) ranges from 3 to 8.
  9. 9. The thermal insulation device (100) according to any one of claims 1 to 5, wherein the phase change layer (110) comprises: and a composite matrix formed with network-shaped pores for filling the phase change material.
  10. 10. A battery (10) comprising at least two cells (200) and an insulating device (100) according to any one of claims 1 to 9; Wherein the heat insulation device (100) is arranged between two adjacent battery cells (200).

Description

Heat insulation device and battery pack Technical Field The utility model relates to the technical field of batteries, in particular to a heat insulation device and a battery pack. Background With the development of new energy technology, batteries are increasingly widely applied to the market. In the case of thermal runaway of a certain cell in the battery pack, heat generated from the thermal runaway cell is conducted to an adjacent cell and is easily diffused throughout the battery pack. In the related art, a heat insulation structure is arranged between the battery monomers to play a role in blocking heat, such as aerogel, foam and the like. However, although the aerogel has excellent heat insulation performance, the compression rebound resilience performance is poor, and the foam has good compression rebound resilience performance, but the heat insulation performance is poor. Therefore, the heat insulating structure in the related art cannot achieve both heat insulating performance and compression performance. Disclosure of utility model The embodiment of the utility model provides a heat insulation device and a battery pack, which are used for at least partially solving the technical problems. In a first aspect, embodiments of the present utility model provide an insulating device comprising: The phase change layer comprises at least two first side parts which are arranged at intervals in a first direction; a heat insulating layer having a heat insulating chamber for filling a heat insulating gas; the heat insulation layers are arranged between two adjacent first side parts. Optionally, in some embodiments of the application, the thermal insulation layer includes: The heat insulation cavity is formed by wrapping at least the first packaging layer; Wherein, in the first direction, at least part of the first encapsulation layer is located between the insulating cavity and the first side. Optionally, in some embodiments of the present application, the phase change layer further includes: A second side at least partially surrounding the perimeter of the insulating cavity; Wherein, in the first direction, the second side part is positioned between two adjacent first side parts; at least a portion of the first encapsulation layer is located between the second side and the insulating cavity in a second direction, the second direction intersecting the first direction. Optionally, in some embodiments of the present application, the ratio of the thickness of the second side portion to the thickness of the first side portion ranges from 0.8 to 1.2. Alternatively, in some embodiments of the application, the second side portion is connected to the first side portion on both sides in the first direction, respectively, such that the first side portion and the second side portion constitute a continuous whole around the insulation layer. Optionally, in some embodiments of the application, the heat insulation apparatus further comprises: the second packaging layer is at least partially arranged on the first side part in a surrounding mode. Optionally, in some embodiments of the application, the thermal insulation layer includes: The heat insulation cavity is formed by wrapping at least the first packaging layer; The second packaging layer is arranged on the outer side of the first packaging layer in a surrounding mode, and the phase change layer is packaged between the first packaging layer and the second packaging layer. Optionally, in some embodiments of the present application, a ratio of a thickness of the insulating cavity to a thickness of the phase change layer in the first direction ranges from 3 to 8. Optionally, in some embodiments of the present application, the phase change layer includes: and a composite matrix formed with network-shaped pores for filling the phase change material. In a second aspect, embodiments of the present utility model provide a battery pack comprising at least two battery cells and an insulating device as described above; wherein, the heat insulation device is arranged between two adjacent battery monomers. The embodiment of the utility model has the beneficial effects that: In the embodiment of the utility model, the heat insulation layer is arranged between the two first side parts of the phase change layer, the heat insulation layer is provided with the heat insulation cavity for filling heat insulation gas, the heat insulation gas can prevent heat conduction along the first direction on the basis that the phase change layer absorbs or releases heat autonomously to ensure temperature balance, and meanwhile, the heat insulation layer also has good compression elasticity due to the arrangement of the heat insulation cavity, so that better buffering is provided between the battery cells. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be brie