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CN-224232891-U - Battery device and electricity utilization device

CN224232891UCN 224232891 UCN224232891 UCN 224232891UCN-224232891-U

Abstract

The present application relates to a battery device and an electric device. The battery device includes a connector and a plurality of battery cells. The battery cells comprise electrode terminals, the electrode terminals are constructed as metal pieces with single materials, a connecting piece is arranged between two adjacent battery cells, one end of the connecting piece is connected with the electrode terminal of one of the two adjacent battery cells, and the other end of the connecting piece is connected with the electrode terminal of the other of the two adjacent battery cells. The battery device provided by the embodiment of the application adopts a single material to prepare the electrode terminal, and the riveting block can be omitted, so that the electrode terminal and the connecting piece can be directly connected together, the space occupied by the whole electrode terminal on the battery monomer is reduced, the volume of the battery monomer is reduced, the energy density of the battery monomer is improved, and the energy density of the battery device is further improved.

Inventors

  • CHENG QI
  • ZHOU WENLIN
  • KE HAIBO
  • CAO MENGKAI
  • HUANG SHOUJUN

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250321

Claims (11)

  1. 1. A battery device, characterized by comprising: A connecting piece; The battery cells comprise electrode terminals, the electrode terminals are made of metal pieces with single materials, one connecting piece is arranged between two adjacent battery cells, one end of the connecting piece is connected with the electrode terminal of one of the two adjacent battery cells, and the other end of the connecting piece is connected with the electrode terminal of the other of the two adjacent battery cells.
  2. 2. The battery device according to claim 1, wherein the electrode terminal and the connecting member are detachably connected.
  3. 3. The battery device of claim 1, wherein the battery cell further comprises an electrode assembly and a housing assembly, the electrode assembly being located within the housing assembly, the housing assembly comprising a first wall on which the electrode terminal is disposed.
  4. 4. The battery device according to claim 3, wherein a mounting position is provided on the first wall, the mounting position is covered with an insulating member, the electrode terminal is provided through the mounting position and is sandwiched between the first wall, and the insulating member is located between the first wall and the electrode terminal.
  5. 5. The battery device according to claim 4, wherein the electrode terminal includes a first section, a second section, and a third section connected in this order, the first section and the third section being located on both sides of the first wall in a thickness direction of the first wall, respectively, the first section being connected to the connecting member, the second section being electrically connected to the electrode assembly; Along the circumference of the second section, the first section and the third section are arranged in a protruding mode relative to the second section, and the first section, the second section and the third section jointly clamp the first wall.
  6. 6. The battery device according to claim 5, wherein a distance between an outermost edge of the first section and an edge of a corresponding side of the first wall in a length direction of the first wall is a, and a is 10 mm≤a≤25 mm; And along the width direction of the first wall, the distance between the outermost edge of the first section and the edge of the corresponding side of the first wall is b, and b is more than or equal to 4mm.
  7. 7. The battery device of claim 5, wherein the insulator further comprises an upper plastic disposed between the first section and the first wall and surrounding a portion of the first section.
  8. 8. The battery device of claim 7, wherein the first wall is provided with a through hole and a groove, the through hole is configured as the mounting position, the groove is communicated with the through hole and is arranged around the through hole, the second section is positioned in the through hole, and the upper plastic is arranged in the groove.
  9. 9. The battery device of claim 8, wherein an orthographic projection of the first section on the first wall in the thickness direction falls within the recess, and a portion of the upper plastic protrudes out of the recess.
  10. 10. The battery device of claim 8, wherein the insulator further comprises a lower plastic disposed within the through hole and around the second section.
  11. 11. An electrical device comprising a battery device according to any one of claims 1 to 10.

Description

Battery device and electricity utilization device Technical Field The present application relates to the field of battery technologies, and in particular, to a battery device and an electric device. Background In the field of batteries, energy density is one of important indexes for measuring battery performance, and based on the requirement of improving battery energy density, weight is required to be reduced in design at a battery cell level and a module level so as to improve energy density. Disclosure of utility model In view of the above, the present application provides a battery device and an electric device, which can reduce the weight of the structure and increase the energy density while maintaining the original functions. In a first aspect, the present application provides a battery device comprising a connector and a plurality of battery cells. The battery cells comprise electrode terminals, the electrode terminals are constructed as metal pieces with single materials, a connecting piece is arranged between two adjacent battery cells, one end of the connecting piece is connected with the electrode terminal of one of the two adjacent battery cells, and the other end of the connecting piece is connected with the electrode terminal of the other of the two adjacent battery cells. According to the technical scheme provided by the embodiment of the application, the electrode terminal is prepared by adopting a single material, the riveting block can be omitted, the electrode terminal and the connecting piece can be directly connected together, and the space occupied by the whole electrode terminal on the battery monomer is reduced, so that the volume of the battery monomer is reduced, the energy density of the battery monomer is improved, and the energy density of the battery device is further improved. In some embodiments, the electrode terminal and the connecting member are detachably connected. The arrangement enriches the connection modes of the electrode terminals and the connecting pieces, improves the installation flexibility, and is convenient for users to adopt corresponding assembly modes according to actual conditions. In some embodiments, the battery cell further includes an electrode assembly and a housing assembly, the electrode assembly being positioned within the housing assembly, the housing assembly including a first wall with electrode terminals disposed thereon. The structure of the electrode terminal is improved, so that the electrode terminal can be directly assembled with the first wall, the structure of the electrode terminal is simplified, the space occupied by the electrode terminal on the surface of the first wall is reduced, the protruding height of the electrode terminal relative to the first wall is reduced, and the energy density is improved. In some embodiments, the first wall is provided with a mounting location, the mounting location is covered with an insulating member, the electrode terminal is disposed through the mounting location and clamped to the first wall, and the insulating member is located between the first wall and the electrode terminal. Thus, the insulating piece can seal and insulate the electrode terminal and the first wall, so that the sealing effect between the electrode terminal and the first wall is improved, the probability that external moisture, dust and the like enter the battery cell and influence the internal environment of the battery cell is reduced, the use safety of the battery cell can be improved, and the pressure balance inside the battery cell is maintained. In some embodiments, the electrode terminal includes a first section, a second section, and a third section connected in sequence, the first section and the third section being located at both sides of the first wall, respectively, in a thickness direction of the first wall, the first section being connected with the connecting member, the second section being electrically connected with the electrode assembly; along the circumference of the second section, the first section and the third section are arranged in a protruding mode relative to the second section, and the first wall is clamped by the first section, the second section and the third section together. Thus, the parts of the electrode terminal located in different directions can be in contact with the first wall, and the connection stability between the electrode terminal and the first wall is improved. In some embodiments, the first section includes a first end, and a distance between an outermost edge of the first section and an edge of a corresponding side of the first wall along a length of the first wall is a,10mm < a < 25mm; along the width direction of the first wall, the distance between the outermost edge of the first section and the edge of the corresponding side of the first wall is b, and b is more than or equal to 4mm. By limiting the sizes of the a and the b, the space of the first wall occupied by the elec