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CN-224217500-U - Arc-shaped battery cell and arc-shaped battery

CN224217500UCN 224217500 UCN224217500 UCN 224217500UCN-224217500-U

Abstract

The utility model discloses an arc-shaped battery cell and an arc-shaped battery, wherein the arc-shaped battery cell comprises a positive plate, a negative plate and a diaphragm, the positive plate, the diaphragm and the negative plate are wound to form the arc-shaped battery cell, the positive plate is rectangular in a flat state, a first slot group is arranged on the positive plate along the length direction of the positive plate, the first slot group of the positive plate in the winding state is positioned on two sides of the arc-shaped battery cell, the first slot group comprises a first sub-slot and a second sub-slot, the negative plate is rectangular in the flat state, the negative plate is provided with a second slot group along the length direction of the negative plate, the second slot groups of the negative plate in the winding state are positioned on two sides of the arc-shaped battery cell, and each second slot group comprises a third sub-slot and a fourth sub-slot. The bending part of the arc-shaped battery cell is not easy to deform or break, the overall safety performance and the service life of the arc-shaped battery cell can be improved, the yield is high, in addition, the grooving structure can form a channel, and the permeation of electrolyte is more facilitated, so that the cycle performance of a product is improved.

Inventors

  • YANG JINGSONG
  • JIANG PEIPEI
  • YANG GANGGANG
  • Yuan Peiling

Assignees

  • 珠海钜能新能源有限公司

Dates

Publication Date
20260508
Application Date
20250425

Claims (10)

  1. 1. An arc-shaped battery cell is characterized by comprising at least one positive plate (10), at least one negative plate (20) and at least one diaphragm (30), wherein the positive plate (10), the diaphragm (30) and the negative plate (20) are wound to form the arc-shaped battery cell; The positive plate (10) is rectangular and sheet-shaped in a flat state, a plurality of first slot groups (11) are arranged on the positive plate (10) along the length direction of the positive plate, the first slot groups (11) of the positive plate (10) in a winding state are positioned on two sides of the arc-shaped battery cell, each first slot group (11) comprises a first sub-cutting slot (111) and a second sub-cutting slot (112), and the length directions of the first sub-cutting slot (111) and the second sub-cutting slot (112) are mutually perpendicular to the length direction of the positive plate (10); The negative electrode plate (20) is rectangular and flaky in a flat state, a plurality of second cutting groove groups (21) are arranged on the negative electrode plate (20) along the length direction of the negative electrode plate, the second cutting groove groups (21) of the negative electrode plate (20) in a winding state are positioned on two sides of the arc-shaped battery cell, each second cutting groove group (21) comprises a third sub-cutting groove (211) and a fourth sub-cutting groove (212), and the length directions of the third sub-cutting groove (211) and the fourth sub-cutting groove (212) are mutually perpendicular to the length direction of the negative electrode plate (20).
  2. 2. The arc cell of claim 1 wherein the first sub-slot (111) and the second sub-slot (112) are elongated slots; The third sub-cutting groove (211) and the fourth sub-cutting groove (212) are long strip grooves.
  3. 3. The arc cell of claim 1, wherein one end of each of the first sub-slit (111) and the second sub-slit (112) penetrates to an end edge in a width direction of the positive electrode tab (10); One end of each of the third sub-slit (211) and the fourth sub-slit (212) penetrates to the end edge of the negative electrode sheet (20) in the width direction.
  4. 4. The arc cell of claim 3 wherein the first sub-slot (111) has the same length dimension as the second sub-slot (112), and the first sub-slot (111) has the same width dimension as the second sub-slot (112); The length dimension of the third sub-cutting groove (211) is the same as that of the fourth sub-cutting groove (212), and the width dimension of the third sub-cutting groove (211) is the same as that of the fourth sub-cutting groove (212).
  5. 5. The arc cell of claim 1 wherein the length dimension of the first sub-slot (111) or the second sub-slot (112) is less than or equal to one third of the width dimension of the positive electrode tab (10); The length dimension of the third sub-slit (211) or the fourth sub-slit (212) is less than or equal to one third of the width dimension of the negative electrode sheet (20).
  6. 6. The arc cell of claim 1 wherein the width dimension of the first sub-slot (111) or the second sub-slot (112) is equal to the thickness dimension of the positive plate (10); The width dimension of the third sub-slit (211) or the fourth sub-slit (212) is equal to the thickness dimension of the negative electrode sheet (20).
  7. 7. The arc cell of claim 1 wherein the first sub-slot (111) or the second sub-slot (112) has a width dimension of 0.1mm to 1mm; The width dimension of the third sub-cutting groove (211) or the fourth sub-cutting groove (212) is 0.1mm-1mm.
  8. 8. The arc cell of claim 1 wherein the positive electrode sheet (10) has a length dimension in the flat state of 80mm to 200mm; The length dimension of the negative electrode sheet (20) in the flat state is 80mm-200mm.
  9. 9. The arc cell of claim 1 wherein the positive plate (10) has a width dimension in the flat state of 15mm to 30mm; The width dimension of the negative electrode sheet (20) in the flat state is 15mm-30mm.
  10. 10. An arc-shaped battery comprising a battery case and an arc-shaped cell according to any one of claims 1 to 9 mounted in the battery case.

Description

Arc-shaped battery cell and arc-shaped battery Technical Field The utility model relates to the technical field of batteries, in particular to an arc-shaped battery core and an arc-shaped battery. Background At present, wearable equipment such as intelligent ring, wearable carries out blood oxygen monitoring or heart rate monitoring on the finger, because intelligent ring structure restriction, its inside needs to adopt arc battery, and the electric core of arc battery uses winding structure to cause positive negative pole piece attached bad easily, and the department of buckling warp, even the fragment influences product security performance and life, and consequently most of technical structure in market adopts lamination structure, but lamination structure leads to the technology complicacy because of the reason that the product size is little, and the qualification rate is not high, manufacturing cost is high. Disclosure of utility model The utility model aims to solve the technical problem of providing an arc-shaped battery cell and an arc-shaped battery. The technical scheme adopted by the utility model for solving the technical problems is that an arc-shaped battery cell is constructed, the arc-shaped battery cell comprises at least one positive plate, at least one negative plate and at least one diaphragm, and the positive plate, the diaphragm and the negative plate are wound to form the arc-shaped battery cell; The positive plate is rectangular in shape in a flat state, a plurality of first slot groups are arranged on the positive plate along the length direction of the positive plate, and the first slot groups of the positive plate in a winding state are positioned on two sides of the arc-shaped battery cell; The negative electrode plate is rectangular in shape in a flat state, a plurality of second notch groups are arranged on the negative electrode plate along the length direction of the negative electrode plate, the second notch groups of the negative electrode plate in a winding state are located on two sides of the arc-shaped battery cell, each second notch group comprises a third sub notch and a fourth sub notch, and the length directions of the third sub notch and the fourth sub notch are mutually perpendicular to the length direction of the negative electrode plate. In some embodiments, the first sub-slit and the second sub-slit are both elongated slits; The third sub-cutting groove and the fourth sub-cutting groove are long strip grooves. In some embodiments, one end of each of the first sub-slit and the second sub-slit penetrates to an end edge of the positive electrode sheet in the width direction; And one ends of the third sub-cutting groove and the fourth sub-cutting groove are communicated with the end edge of the negative electrode plate in the width direction. In some embodiments, the first subslot is the same length dimension as the second subslot, and the first subslot is the same width dimension as the second subslot; The length dimension of the third sub-cutting groove is the same as that of the fourth sub-cutting groove, and the width dimension of the third sub-cutting groove is the same as that of the fourth sub-cutting groove. In some embodiments, the length dimension of the first or second sub-slit is less than or equal to one third of the width dimension of the positive plate; The length dimension of the third sub-cutting groove or the fourth sub-cutting groove is smaller than or equal to one third of the width dimension of the negative plate. In some embodiments, the width dimension of the first or second sub-slot is equal to the thickness dimension of the positive plate; The width dimension of the third sub-cutting groove or the fourth sub-cutting groove is equal to the thickness dimension of the negative plate. In some embodiments, the first or second sub-kerf has a width dimension of 0.1mm-1mm; The width dimension of the third sub-cutting groove or the fourth sub-cutting groove is 0.1mm-1mm. In some embodiments, the positive plate has a length dimension in the flat state of 80mm to 200mm; the length dimension of the negative plate in the flat state is 80mm-200mm. In some embodiments, the positive plate has a width dimension in the flat state of 15mm to 30mm; The width dimension of the negative plate in the flat state is 15mm-30mm. The utility model also provides an arc-shaped battery, which comprises a battery shell and the arc-shaped battery core which is arranged in the battery shell and is in any embodiment. The utility model has the advantages that the bending part of the arc-shaped battery cell is not easy to deform or break, the integral safety performance and the service life of the arc-shaped battery cell can be improved, and the yield is high. In addition, the grooving structure can form a channel, so that the permeation of electrolyte is facilitated, and the cycle performance of a product is improved. Drawings In order to more clearly illustrate the technical