Battery
A battery includes an electrode assembly, a first insulation layer, a second insulation layer, and at least one first adhesion portion. The electrode assembly includes a first surface and a second surface provided back away from the first surface; the first insulation layer is provided on the first surface; the second insulation layer is provided on the first surface and spaced apart from the first insulation layer; and the first adhesion portion is provided on the first surface and located in a zone between the first insulation layer and the second insulation layer.
1 . A battery, comprising:
an electrode assembly, a first layer and a first adhesion portion;
the electrode assembly comprising a first surface, a second surface opposite to the first surface in a third direction, a third end of the electrode assembly and a fourth end of the electrode assembly opposite to the third end of the electrode assembly in a second direction, wherein a metal portion extends from the third end of the electrode assembly;
the first layer is provided on the fourth end of the electrode assembly and extends from the first surface to the second surface; and
the first adhesion portion is provided on the first surface of the electrode assembly, the first adhesion portion overlaps with the first layer as viewed from a first direction and at least a part of the first adhesion portion is spaced apart from the first layer in the first direction, wherein the first direction is perpendicular to the second direction;
wherein the battery further comprises a second adhesion portion provided on the first layer; the first layer being disposed between the second adhesion portion and the first surface of the electrode assembly.
2 . The battery according to claim 1 , further comprising a second layer provided on the fourth end of the electrode assembly and spaced apart from the first layer in the first direction and extending from the first surface to the second surface.
3 . The battery according to claim 2 , wherein the first adhesion portion is provided on the first surface and is located between the first layer and the second layer in the first direction.
4 . The battery according to claim 1 , wherein the battery comprises two or more first adhesion portions, and the two or more first adhesion portions are arranged into a dot array.
5 . The battery according to claim 1 , wherein an area of an orthographic projection of the second adhesion portion onto the first surface is smaller than an area of an orthographic projection of the first layer onto the first surface.
6 . The battery according to claim 1 , wherein the battery comprises at least two second adhesion portions, and the at least two second adhesion portions are arranged into a dot array.
7 . The battery according to claim 1 , wherein the first layer comprises at least one of polyimide, polyvinyl chloride, polyethylene, or polypropylene.
8 . The battery according to claim 1 , wherein the first adhesion portion comprises at least one of cellulose, poly(vinylidene fluoride-co-hexafluoropropylene), poly(vinylidene fluoride-co-trichloroethylene), polymethyl methacrylate, poly butyl acrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinyl acetate, polyethylene-co-vinyl acetate, polyethylene oxide, polyarylate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethyl pullulan, cyanoethyl polyvinyl alcohol, cyanoethyl cellulose, cyanoethyl sucrose, pullulan, carboxymethyl cellulose, or polypropylene-maleic anhydride.
9 . The battery according to claim 2 , wherein an area of an orthographic projection of the first adhesion portion onto the first surface is smaller than a total area of an orthographic projection of the first layer and the second layer onto the first surface.
10 . The battery according to claim 9 , wherein the area of the orthographic projection of the first adhesion portion onto the first surface is smaller than an area of an orthographic projection of the first layer onto the first surface, and is smaller than an area of an orthographic projection of the second layer onto the first surface.
11 . The battery according to claim 2 , wherein a distance from a part of the first surface in which the first surface is in contact with the first layer to the second surface in the third direction is a first distance, a distance from the first adhesion portion to the second surface in the third direction is a second distance, and the first distance is shorter than the second distance.
12 . The battery according to claim 11 , wherein a distance from a part of the first surface in which the first surface is in contact with the second layer to the second surface in the third direction is a third distance, and the third distance is shorter than the second distance.
13 . The battery according to claim 1 , wherein a length of the first adhesion portion in the first direction is smaller than a half of a length of the first surface in the first direction.
14 . The battery according to claim 1 , wherein the first surface is provided with a first groove, and at least a part of the first adhesion portion is located in the first groove.
15 . The battery according to claim 14 , wherein a surface of the first layer is provided with a second groove, and at least a part of the second adhesion portion is located in the second groove.
16 . The battery according to claim 1 , wherein the battery further comprises a third adhesion portion provided on a surface of the first layer facing away from the second surface, and the third adhesion portion extends from the surface of the first layer to the first surface.
17 . The battery according to claim 1 , wherein the battery further comprises a plurality of fourth adhesion portions provided on the first surface, the plurality of fourth adhesion portions being provided between the third end of the electrode assembly and the fourth end of the electrode assembly.
18 . The battery according to claim 17 , wherein the electrode assembly comprises at least two fourth adhesion portions with different orthographic projection shapes.
19 . The battery according to claim 17 , wherein the electrode assembly comprises at least two fourth adhesion portions, and the fourth adhesion portions are arranged into a dot array.
20 . The battery according to claim 1 , wherein,
the electrode assembly is of a winding structure;
the electrode assembly further comprises a third layer; and
the third layer is provided on the second surface and fastened to an end of an outermost electrode plate of the electrode assembly.
21 . The battery according to claim 2 , wherein the battery further comprises a housing, and the housing encloses the electrode assembly, the first layer, and the second layer, and adheres to the electrode assembly through the first adhesion portion.
22 . The battery according to claim 1 further comprises two or more second adhesion portions provided on a surface of first layer facing away from the first surface.
23 . The battery according to claim 22 , wherein for each of the two or more second adhesion portions, an area of an orthographic projection of the second adhesion portion onto the first surface is smaller than an area of an orthographic projection of the first layer onto the first surface.
24 . The battery according to claim 22 , wherein an area of an orthographic projection of the second adhesion portions onto the first surface is smaller than an area of an orthographic projection of the first layer onto the first surface.
25 . The battery according to claim 22 , wherein the surface of the first layer is provided with two or more second grooves, wherein each second groove is provided with one of the at least two or more second adhesion portions.
26 . An electronic device, comprising the battery according to claim 1 .