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CN-224232775-U - Battery device, energy storage device and electricity utilization device

CN224232775UCN 224232775 UCN224232775 UCN 224232775UCN-224232775-U

Abstract

The embodiment of the application provides a battery device, an energy storage device and an electricity utilization device. The battery device comprises a box body and a battery cell assembly. The box body is provided with a containing cavity. The battery cell assembly is arranged in the accommodating cavity, and comprises a plurality of battery packs which are arranged along the first direction at intervals, and each battery pack comprises a plurality of battery cells which are distributed along the second direction. The box comprises two end walls and at least one pulling plate. The two end walls are disposed opposite each other in the second direction. Opposite ends of the pull plate along the second direction are respectively connected to the two end walls, and the pull plate is arranged between the adjacent battery packs, wherein the first direction, the second direction and the height direction of the battery device are intersected. The battery device provided by the embodiment of the application can improve the structural strength of the battery device and the battery cell expansion resistance of the battery device to a certain extent, so that the battery device can better meet the battery cell expansion resistance requirement.

Inventors

  • WU KAI
  • MIAO HUIMIN
  • LIU LIHUI

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250317

Claims (19)

  1. 1. A battery device, characterized in that the battery device comprises: The box body is provided with a containing cavity; The battery cell assembly is arranged in the accommodating cavity, the battery cell assembly comprises a plurality of battery packs which are arranged at intervals along a first direction, and the battery packs comprise a plurality of battery cells which are distributed along a second direction; The box includes: Two end walls, two said end walls are set up along the said second direction oppositely; And the two opposite ends of the pull plate along the second direction are respectively connected with the two end walls, and the pull plate is arranged between the adjacent battery packs, wherein the first direction, the second direction and the height direction of the battery device are intersected.
  2. 2. The battery device of claim 1, wherein the pull plate comprises a plurality of layers of composite material disposed, the layers of composite material of each layer comprising a fiber and a resin matrix.
  3. 3. The battery device of claim 2, wherein the pull plate comprises a thermal insulation layer, the composite material layer is coated on the outer surface of the thermal insulation layer, and the thermal resistance of the thermal insulation layer is greater than the thermal resistance of the composite material layer.
  4. 4. The battery device of claim 3, wherein the insulating layer has a thickness of 0.2mm to 0.6mm.
  5. 5. The battery device of claim 3 or 4, wherein the thermal barrier layer comprises at least one of ceramic composite tape or mica.
  6. 6. The battery device according to any one of claims 3 to 5, wherein the total thickness of the composite material layer on either side of the heat insulating layer in the thickness direction is 1.0mm to 3mm.
  7. 7. The battery device of any one of claims 2 to 6, wherein the composite layer comprises fibrous unidirectional tapes, the fibers in the fibrous unidirectional tapes extending in the second direction.
  8. 8. The battery device of claim 7, wherein the composite layer further comprises a fiber braid, at least a portion of the composite layer of at least an outermost layer of the pull plate being the fiber braid.
  9. 9. The battery device of any one of claims 2 to 6, wherein the composite material layer comprises a plurality of fibrous prepreg layers.
  10. 10. The battery device according to claim 2, wherein the case includes a bottom plate constituting a bottom wall of the accommodating chamber, the end wall and the pull plate are both connected to the bottom plate, and the end wall and/or the bottom plate includes the composite material layers provided in a plurality of layers.
  11. 11. The battery device of claim 10, wherein the end wall, the pull plate, and the bottom plate are of unitary construction.
  12. 12. The battery device of claim 10 or 11, wherein the composite layers comprise adjacent first, second, and third composite layers, the first composite layer, the second composite layer and the third composite layer overlap each other; Wherein the first composite layer extends from the surface of the end wall to the surface of the bottom wall to cover a connection line between the end wall and the bottom wall, the second composite layer extends from the surface of the bottom wall to the surface of the pulling plate to cover a connection line between the bottom wall and the pulling plate, and the third composite layer extends from the surface of the pulling plate to the surface of the end wall to cover a connection line between the pulling plate and the end wall.
  13. 13. The battery device of any one of claims 2 to 12, wherein the fibers comprise at least one of glass fibers and aramid fibers.
  14. 14. The battery device according to any one of claims 2 to 13, wherein the resin matrix includes at least one of an epoxy resin, a polyurethane resin, a vinyl resin, a polypropylene resin, and a polyamide resin.
  15. 15. The battery device of any one of claims 1 to 14, wherein the pull plate has a thickness of 3mm-6mm.
  16. 16. The battery device of any one of claims 1 to 15, wherein a maximum distance between the pull plate and the bottom wall of the receiving cavity is greater than or equal to a maximum distance between the shoulder of the battery cell and the bottom wall of the receiving cavity.
  17. 17. An energy storage device comprising a battery device according to any one of claims 1 to 16.
  18. 18. An electrical device comprising a battery device according to any one of claims 1 to 16 or an energy storage device according to claim 17.
  19. 19. The electrical device of claim 18, wherein the electrical device comprises an aircraft.

Description

Battery device, energy storage device and electricity utilization device Technical Field The present application relates to the field of battery technologies, and in particular, to a battery device, an energy storage device, and an electric device. Background Batteries are increasingly used in life and industry, for example, new energy automobiles having the batteries mounted therein have been widely used, and in addition, the batteries are increasingly used in the field of energy storage and the like. In powered devices that incorporate battery means, the battery may be used to provide power in whole or in part. In the related art, a large pressure is generated to the end wall of the case during the expansion of the battery cells. Therefore, how to improve the battery cell expansion resistance of the battery device has become an important research direction in the art. Disclosure of utility model In view of the foregoing, it is desirable to provide a battery device, an energy storage device and an electric device, which can improve the battery device battery cell expansion resistance to a certain extent. To this end, a first aspect of an embodiment of the present application provides a battery device including: The box body is provided with a containing cavity; The battery cell assembly is arranged in the accommodating cavity, the battery cell assembly comprises a plurality of battery packs which are arranged at intervals along a first direction, and the battery packs comprise a plurality of battery cells which are distributed along a second direction; The box includes: Two end walls, two said end walls are set up along the said second direction oppositely; And the two opposite ends of the pull plate along the second direction are respectively connected with the two end walls, and the pull plate is arranged between the adjacent battery packs, wherein the first direction, the second direction and the height direction of the battery device are intersected. The battery device provided by the embodiment of the disclosure comprises a box body and a battery unit component, wherein the box body is provided with a containing cavity, the battery unit component is arranged in the containing cavity, and the box body plays a role in protecting the battery unit component. The box has set up at least one arm-tie, and the arm-tie is connected respectively in two end walls of box along the opposite both ends of second direction, and the arm-tie sets up between adjacent group battery, so, can promote battery device's structural strength, can promote battery device anti battery monomer expansion properties to a certain extent to make battery device can satisfy anti battery monomer expansion demand better. In some embodiments, the pulling plate comprises a plurality of composite layers disposed, each of the composite layers comprising a fiber and a resin matrix. In this embodiment, the pull plate includes the composite material layer disposed in multiple layers, and the composite material layer has lighter weight and higher strength, so that the quality of the pull plate is advantageously reduced and the structural strength of the pull plate is advantageously improved, thereby advantageously improving the energy density and the structural strength of the battery device. In some embodiments, the pull plate comprises a thermal insulation layer, the composite material layer is coated on the outer surface of the thermal insulation layer, and the thermal resistance of the thermal insulation layer is greater than that of the composite material layer. In the embodiment, the heat insulation layer is arranged, and the composite material layer is coated on the heat insulation layer, so that the structural strength of the pull plate is further improved. In addition, the thermal resistance of the heat insulation layer is set to be larger than that of the composite material layer, so that the pull plate can also play a role in heat insulation. In some embodiments, the insulating layer has a thickness of 0.2mm to 0.6mm. By setting the thickness of the heat insulation layer to be 0.2mm-0.6mm, the pulling plate has certain structural strength and simultaneously is beneficial to reducing the weight and manufacturing cost of the pulling plate. In some embodiments, the thermal barrier layer comprises at least one of ceramic composite tape or mica. Here, the ceramic composite tape or mica has a certain structural strength and a certain thermal resistance, so that the pulling plate has a certain structural strength and thermal insulation performance. In some embodiments, the composite layer on either side of the insulation layer in the thickness direction has a total thickness of 1.0mm to 3mm. By setting the thickness of the composite material layer to be 1.0-3 mm, the pulling plate has certain structural strength and simultaneously is beneficial to reducing the weight and manufacturing cost of the pulling plate. In some embodiments, the composi