Lithium-Ion Battery

1 . A lithium-ion battery, comprising:

a wound structure formed by winding a negative electrode plate, a separator, and a positive electrode plate in a winding direction, the wound structure comprising an arc-shaped bending part;

wherein the negative electrode plate comprises a negative electrode material layer, and an insulation layer and a reaction layer located on a surface of the insulation layer are provided on a surface of the negative electrode material layer in the bending part, the reaction layer comprising a lithium storage material.

2 . The lithium-ion battery according to claim 1 , wherein:

a thickness d of the reaction layer satisfies:

q

×

(

x

+

h

2

+

h

3

)

-

h

1

h

1

×

m

1

×

ρ

×

a

×

10000

-

15

≤

d

;

h 1 : a thickness of a single layer of the negative electrode material layer, in μm;

h 2 : a thickness of a single layer of the positive electrode material layer, in μm;

h 3 : a thickness of the separator, in μm;

x: a distance between the negative electrode material layer and the positive electrode material layer in the bending part, in μm;

q: a capacity of a single layer of the negative electrode active material layer in the bending part, in mAh;

a: an area of a single layer of the negative electrode active material layer in the bending part, in cm 2 ;

m 1 : a gram capacity of the reaction layer, in mAh/g;

ρ: a density of the reaction layer, in g/cm 3 ; and

d: in μm.

3 . The lithium-ion battery according to claim 2 , wherein the thickness d of the reaction layer satisfies:

q

×

(

x

+

h

2

+

h

3

)

-

h

1

h

1

×

m

1

×

ρ

×

a

×

10000

-

10

≤

d

.

4 . The lithium-ion battery according to claim 2 , wherein the thickness d of the reaction layer satisfies:

q

×

(

x

+

h

2

+

h

3

)

-

h

1

h

1

×

m

1

×

ρ

×

a

×

10000

-

10

≤

d

≤

q

×

(

x

+

h

2

+

h

3

)

-

h

1

h

1

×

m

1

×

ρ

×

a

×

10000

+

80.

5 . The lithium-ion battery according to claim 1 , wherein:

the lithium storage material comprises at least one of graphite, elemental silicon, silicon oxide, silicon suboxide, tin oxide, copper oxide, or zinc oxide.

6 . The lithium-ion battery according to claim 1 , wherein:

the insulation layer comprises at least one of aluminum oxide, boehmite, zirconium oxide, titanium oxide, magnesium oxide, lithium oxide, silicon oxide, cobalt oxide, nickel oxide, zinc oxide, gallium oxide, germanium oxide, yttrium oxide, strontium oxide, barium oxide, or molybdenum oxide.

7 . The lithium-ion battery according to claim 1 , wherein:

a thickness of the insulation layer is 1 to 10 μm.

8 . The lithium-ion battery according to claim 1 , wherein:

a thickness of the insulation layer is 2 to 4 μm.

9 . The lithium-ion battery according to claim 1 , wherein:

a Young's modulus of the insulation layer is greater than or equal to 6 GPa.

10 . The lithium-ion battery according to claim 1 , wherein:

a Young's modulus of the insulation layer is 6 to 30 GPa.

11 . The lithium-ion battery according to claim 1 , wherein:

a gram capacity of the reaction layer is 300 to 5000 mAh/g.

12 . The lithium-ion battery according to claim 1 , wherein:

a gram capacity of the reaction layer is 1000 to 4000 mAh/g.

13 . The lithium-ion battery according to claim 1 , wherein:

a particle size of the reaction layer is 0.1 to 6 μm, and

a particle size of the insulation layer is 0.1 to 10 μm.

14 . The lithium-ion battery according to claim 1 , wherein:

a particle size of the reaction layer is 0.1 to 2 μm, and

a particle size of the insulation layer is 0.1 to 4 μm.

15 . A battery module, comprising:

a lithium-ion battery comprising:

a wound structure formed by winding a negative electrode plate, a separator, and a positive electrode plate in a winding direction, the wound structure comprising an arc-shaped bending part;

wherein the negative electrode plate comprises a negative electrode material layer, and an insulation layer and a reaction layer located on a surface of the insulation layer are provided on a surface of the negative electrode material layer in the bending part, the reaction layer comprising a lithium storage material.

16 . A battery pack, comprising:

the battery module according to claim 15 .

17 . A power consuming device, comprising:

a lithium-ion battery comprising:

a wound structure formed by winding a negative electrode plate, a separator, and a positive electrode plate in a winding direction, the wound structure comprising an arc-shaped bending part;

wherein the negative electrode plate comprises a negative electrode material layer, and an insulation layer and a reaction layer located on a surface of the insulation layer are provided on a surface of the negative electrode material layer in the bending part, the reaction layer comprising a lithium storage material.