Cell, battery, and electric apparatus
A cell, including an electrode assembly and a shell. The electrode assembly includes tabs, and the electrode assembly is disposed in the shell. The shell includes a packaging part and a sealing part connected to the packaging part, where the sealing part is formed by extending the packaging part outward, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part. The packaging part includes a side wall, where notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall.
1 . A cell, comprising:
an electrode assembly comprising tabs; and
a shell, the electrode assembly being disposed in the shell;
wherein,
the shell comprises a packaging part and a sealing part connected to the packaging part, wherein the sealing part is formed by extending the packaging part outwards, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part; and
the packaging part comprises a side wall, wherein notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall;
the packaging part further comprises a first end surface, and a second end surface opposite to the first end surface; wherein each of the first end surface and the second end surface is connected to the side wall,
wherein the cell further comprises a first bonding member, wherein one end of the first bonding member is disposed on the side wall, the first end surface, or the second end surface; and an other end of the first bonding member is disposed on a surface of the sealing part facing away from the packaging part, to fix the sealing part to the packaging part;
wherein, along an axial direction in which the sealing part extends from the joint of the sealing part and the packaging part, a length of the first bonding member is greater than a length of the sealing part.
2 . The cell according to claim 1 , wherein the shell comprises a first packaging film and a second packaging film;
the first packaging film comprises a first part and a first edge part connected to the first part, and the second packaging film comprises a second part and a second edge part connected to the second part; and
the first part and the second part enclose the packaging part, and the first edge part and the second edge part are connected to form the sealing part.
3 . The cell according to claim 2 , wherein the first part is recessed to form a first accommodating cavity, wherein a vertical section of the first accommodating cavity is inverted U-shaped; and the second part is flat and seals the first part to form the packaging part.
4 . The cell according to claim 2 , wherein the first part is recessed to form a first accommodating cavity, wherein a vertical section of the first accommodating cavity is inverted U-shaped; the second part is recessed to form a second accommodating cavity, wherein a vertical section of the second accommodating cavity is U-shaped; and the first accommodating cavity and the second accommodating cavity enclose the packaging part.
5 . The cell according to claim 1 , wherein the notches are at least one of arc-shaped notches, V-shaped notches, semi-circular notches, U-shaped notches, or polygonal notches.
6 . The cell according to claim 1 , wherein a minimum distance between an edge of the notches and the joint of the packaging part and the sealing part is greater than or equal to 0.5 mm.
7 . The cell according to claim 1 , wherein a distance from the joint of the sealing part and the packaging part to the first end surface is greater than or equal to a distance from the joint to the second end surface.
8 . The cell according to claim 1 , wherein the cell further comprises a second bonding member, wherein the second bonding member is disposed between the side wall and a surface of the sealing part facing toward the packaging part to fix the sealing part to the packaging part.
9 . A battery, comprising a housing and the cell according to claim 1 , wherein the cell is accommodated in the housing.
10 . The battery according to claim 9 , wherein the shell comprises a first packaging film and a second packaging film;
the first packaging film comprises a first part and a first edge part connected to the first part, and the second packaging film comprises a second part and a second edge part connected to the second part; and
the first part and the second part enclose the packaging part, and the first edge part and the second edge part are connected to form the sealing part.
11 . The battery according to claim 10 , wherein the first part is recessed to form a first accommodating cavity, wherein a vertical section of the first accommodating cavity is inverted U-shaped; and the second part is flat and seals the first part to form the packaging part.
12 . The battery according to claim 10 , wherein the first part is recessed to form a first accommodating cavity, wherein a vertical section of the first accommodating cavity is inverted U-shaped; the second part is recessed to form a second accommodating cavity, wherein a vertical section of the second accommodating cavity is U-shaped; and the first accommodating cavity and the second accommodating cavity enclose the packaging part.
13 . The battery according to claim 9 , wherein the notches are at least one of arc-shaped notches, V-shaped notches, a semi-circular notches, U-shaped notch, or polygonal notches.
14 . The battery according to claim 9 , wherein a minimum distance between an edge of the notches and the joint of the packaging part and the sealing part is greater than or equal to 0.5 mm.
15 . The battery according to claim 9 , wherein a distance from the joint of the sealing part and the packaging part to the first end surface is greater than or equal to a distance from the joint to the second end surface.
16 . The battery according to claim 9 , wherein the cell further comprises a second bonding member, wherein the second bonding member is disposed between the side wall and a surface of the sealing part facing toward the packaging part, to fix the sealing part to the packaging part.
17 . An electric apparatus, comprising a body, the battery according to claim 9 , wherein the battery is accommodated in the body.
18 . The battery according to claim 1 , wherein the first bonding member comprises at least one material selected from the group consisting of polyethylene oxide, polyvinylidene fluoride, modified polyvinylidene fluoride, styrene-butadiene rubber, vinylidene fluoride and hexafluoropropene copolymer, polyacrylate, modified polyacrylate, and modified polydiene.