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CN-224232790-U - Battery device and electric equipment

CN224232790UCN 224232790 UCN224232790 UCN 224232790UCN-224232790-U

Abstract

The application relates to a battery device and electric equipment, when a cover body is covered on a base, a first matching piece and a second matching piece are matched with each other, and the first matching piece and the second matching piece are bonded and sealed through a sealing piece, so that effective bonding between the first matching piece and the second matching piece is realized, and sealing between the cover body and the base is also realized. Meanwhile, the thickness of the base and/or the cover body is controlled to be 0.8-2 mm, so that the thickness of the base or the cover body is controlled, and a larger accommodating space is reserved between the base and the cover body. Also, since at least one of both sides of the first and second mating members facing each other is provided with a recess, a portion of the sealing member is embedded in the recess, increasing the thickness of the sealing member. By the design, under the condition of meeting the energy density lifting demand, the sealing failure between the sealing element and the first matching element or the second matching element caused by deformation of the cover body or the base is reduced, so that the sealing reliability of the battery device is improved.

Inventors

  • DU JIE
  • YU JINGJING
  • AI SHAOHUA

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250408

Claims (17)

  1. 1. A battery device, characterized in that the battery device comprises: a base (20) comprising a first mating member (21); The cover body (30) is covered on the base (20) and comprises a second matching piece (31) matched with the first matching piece (21), and the thickness of the base (20) and/or the cover body (30) is 0.8-2 mm; A seal (70) bonded between the first mating member (21) and the second mating member (31); Wherein at least one of the two side surfaces of the first matching piece (21) and the second matching piece (31) facing each other is provided with a concave part (40), and the sealing piece (70) is partially arranged in the concave part (40).
  2. 2. The battery device according to claim 1, wherein the depth of the recess (40) is denoted as h0, wherein 0.4 mm≤h0≤0.6 mm.
  3. 3. The battery device according to claim 1, characterized in that the battery device comprises a fastener (50), the fastener (50) being used for fixing the first mating member (21) and the second mating member (31).
  4. 4. A battery device according to claim 3, characterized in that the recess (40) is located on the side of the fastener (50) facing the interior of the base (20).
  5. 5. The battery device according to claim 1, wherein the base (20) further comprises a first body (22), the cover (30) further comprises a second body (32), the first mating member (21) is disposed around the outer periphery of the first body (22), the second mating member (31) is disposed around the outer periphery of the second body (32), and an accommodating space (60) is formed between the first body (22) and the second body (32).
  6. 6. The battery device according to claim 5, wherein the recess (40) is provided around the outer periphery of the accommodation space (60).
  7. 7. The battery device according to claim 5, wherein the first body (22) is provided with a first protrusion (221), one end of the first protrusion (221) extends to the first mating member (21), and/or, The second main body (32) is provided with a second protrusion (321), and one end of the second protrusion (321) extends to the second matching piece (31).
  8. 8. The battery device according to claim 1, wherein a dimension of a portion where the first fitting member (21) and the second fitting member (31) are projected and overlapped with each other along a direction from an end of the first fitting member (21) away from the inside of the base (20) to an end of the first fitting member (21) away from the inside of the base (20) is denoted as W, wherein 5mm is equal to or less than 15mm.
  9. 9. The battery device according to claim 8, wherein the dimension W further satisfies the condition that 6 mm≤W≤10 mm.
  10. 10. The battery device according to claim 1, wherein the thickness of the cover (30) is denoted as h2, wherein 0.8 mm≤h2≤1.6 mm.
  11. 11. The battery device according to any one of claims 1-10, wherein the first mating member (21) comprises a first substrate (211) and a first coating (212), the first coating (212) being wrapped around the first substrate (211).
  12. 12. The battery device according to claim 11, wherein the material of the first coating (212) is an epoxy resin, and/or, The first coating (212) comprises a first electrophoretic coating (21 a) and a first spraying coating (21 b), the first electrophoretic coating (21 a) is arranged on the surface of the first substrate (211), and the first spraying coating (21 b) is arranged on the surface of the first electrophoretic coating (21 a).
  13. 13. The battery device according to any one of claims 1-10, wherein the second mating member (31) comprises a second substrate (311) and a second coating (312), the second coating (312) being applied to the second substrate (311).
  14. 14. The battery device according to claim 13, wherein the material of the second coating (312) is an epoxy resin, and/or, The second coating (312) comprises a second electrophoretic coating (31 a) and a second spraying coating (31 b), the second electrophoretic coating (31 a) is arranged on the surface of the second substrate (311), and the second spraying coating (31 b) is arranged on the surface of the second electrophoretic coating (31 a).
  15. 15. The battery device according to any one of claims 1 to 10, wherein the material of the seal member (70) includes an a-component including a modified siloxane and a B-component including an epoxy resin.
  16. 16. The battery device according to any one of claims 1-10, further comprising a battery cell (10), the battery cell (10) being housed between the cover (30) and the base (20).
  17. 17. A powered device comprising the battery arrangement of any of claims 1-16.

Description

Battery device and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a battery device and electric equipment. Background With the rapid development of battery technology, the reliability requirements for batteries have increased. For this reason, the battery is usually bonded with a sealant at the time of packaging and sealing. However, with the rise of the design requirement of high energy density of the battery, the battery is easy to generate sealing failure at the sealing glue, and the reliability of the battery is affected. Disclosure of utility model Based on this, it is necessary to provide a battery device and an electric device, which are beneficial to improving the sealing reliability of the battery device under the condition of meeting the energy density improvement requirement. The application provides a battery device, which comprises a base, a cover body and a sealing piece, wherein the base comprises a first matching piece, the cover body is covered on the base and comprises a second matching piece matched with the first matching piece, the sealing piece is adhered between the first matching piece and the second matching piece, the thickness of the base and/or the cover body is 0.8 mm-2 mm, at least one of two side surfaces of the first matching piece and the second matching piece, which face each other, is provided with a concave part, and the sealing piece is partially arranged in the concave part. The battery device comprises a base, a first matching piece, a second matching piece, a sealing piece, a cover body, a sealing piece, a battery cover and a cover body. Meanwhile, the thickness of the base and/or the cover body is controlled to be 0.8-2 mm, so that the thickness of the base or the cover body is controlled, and a larger accommodating space is reserved between the base and the cover body. Also, since at least one of both sides of the first and second mating members facing each other is provided with a recess, a portion of the sealing member is embedded in the recess, increasing the thickness of the sealing member. By the design, under the condition of meeting the energy density lifting demand, the sealing failure between the sealing element and the first matching element or the second matching element caused by deformation of the cover body or the base is reduced, so that the sealing reliability of the battery device is improved. In some embodiments, the depth of the recess is denoted as h0, where 0.4 mm≤h0≤0.6 mm. By the design, the depth of the concave part is controlled to be 0.4-0.6 mm, the thickness of the sealing piece and the structural strength of the first matching piece or the second matching piece are effectively considered, and the reliability of the battery device is effectively improved. In some embodiments, the battery device includes a fastener for securing the first mating member with the second mating member. By the design, the fastener is introduced, so that the first matching piece and the second matching piece are stably combined, and the structural stability of the battery device is improved. In some embodiments, the recess is located on a side of the fastener facing the interior of the base. By the design, the concave part is arranged on one side of the fastener facing the inside of the battery device, so that the first matching piece and the second matching piece are fastened by the outside and sealed by the inside, and the sealing reliability of the battery device is further improved. In some embodiments, the base further comprises a first main body, the cover further comprises a second main body, the first fitting part is annularly arranged on the periphery of the first main body, the second fitting part is annularly arranged on the periphery of the second main body, and an accommodating space is formed between the first main body and the second main body. By the design, the first main body and the second main body are introduced to provide a closed accommodating space for accommodating the battery monomers, so that the structural stability of the battery device is improved. In some embodiments, the recess is disposed around the outer circumference of the receiving space. The design is such that the part of sealing member in concave part also sets up around the periphery of accommodation space, further improves the seal reliability of battery device. In some embodiments, a first protrusion is provided on the first body, and one end of the first protrusion extends to the first mating member. By means of the design, the first bulge is introduced, so that the structural strength of the first main body and the first matching piece can be enhanced, and the sealing reliability of the battery device can be improved. In some embodiments, a second protrusion is provided on the second body, and one end of the second protrusion extends to the second mating member. By the design, the second bulge is introdu