# US 2026/0100482 A1 · Electrochemical apparatus and electric device including same

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- Number: US 2026/0100482 A1
- Document ID: US20260100482A1
- Status: Published application
- Kind: A1
- Application number: 19/417,533
- Filed: 2025-12-12
- Published: 2026-04-09
- Earliest claimed: 2023-06-12
- Assignees: Ningde Amperex Technology Limited
- Applicants: Ningde Amperex Technology Limited
- Inventors: Nan JIANG; Qiao ZENG; Dongyang YAN
- Web page: https://patentgrep.com/patent/US20260100482A1

## CPC

- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 50/457: comprising three or more layers
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 50/105: Pouches or flexible bags
- H01M 50/443: Particulate material
- H01M 50/446: Composite material consisting of a mixture of organic and inorganic materials
- H01M 50/451: comprising layers of only organic material and layers containing inorganic material
- H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M 50/461: {with adhesive layers between electrodes and separators}
- H01M 50/59: characterised by the protection means
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An electrochemical apparatus includes a housing, an electrode assembly, a first insulating layer, and an electrolyte, where the electrode assembly and the electrolyte are accommodated in the housing. The electrode assembly includes a plurality of electrode plates stacked along a first direction and a first separator disposed between the plurality of electrode plates. The electrode assembly further includes a first surface and a second surface opposite each other in the first direction, and a first end face connecting the first surface and the second surface. The first insulating layer is adhered to the first surface, the second surface, and the first end face. The first separator includes a substrate layer and a plurality of first coatings spaced apart on a surface of the substrate layer facing an adjacent electrode plate.

## Claims

### Claim 1

An electrochemical apparatus, comprising:
a housing;
an electrode assembly accommodated in the housing, wherein the electrode assembly comprises a plurality of electrode plates stacked along a first direction and first separators disposed between the plurality of electrode plates; and the electrode assembly further comprises a first surface and a second surface opposite to each other in the first direction, and a first end face connected between the first surface and the second surface;
a first insulating layer adhered to all the first surface, the second surface, and the first end face; and
an electrolyte accommodated in the housing;
wherein the first separator comprises a substrate layer, and first coatings spaced apart on a surface of the substrate layer facing an adjacent electrode plate.

### Claim 2 (depends on 1)

The electrochemical apparatus according to claim 1, wherein each first coating is strip-shaped; the substrate layer comprises two side edges opposite to each other in a second direction perpendicular to the first direction; and the first coatings are obliquely arranged with respect to the side edges.

### Claim 3 (depends on 2)

The electrochemical apparatus according to claim 2, wherein when viewed in the first direction, an included angle between each first coating and the side edge is θ1, wherein 25°<θ1≤65°.

### Claim 4 (depends on 2)

The electrochemical apparatus according to claim 2, wherein when viewed in the first direction, a width of each first coating is D1, and a spacing between two adjacent first coatings is D2, wherein 0.3D2≤D1≤0.5D2.

### Claim 5 (depends on 2)

The electrochemical apparatus according to claim 2, wherein the first separator further comprises a plurality of second coatings, and the plurality of second coatings are spaced apart on a surface of the substrate layer facing away from the first coatings.

### Claim 6 (depends on 5)

The electrochemical apparatus according to claim 5, wherein the first coatings and the plurality of second coatings are spatially interdigitated.

### Claim 7 (depends on 1)

The electrochemical apparatus according to claim 1, wherein the first separator comprises a plurality of first portions located among a plurality of electrode plates, and a second portion and a third portion located outside the plurality of electrode plates and opposite to each other in the first direction; each of the first portions is disposed between two adjacent electrode plates; and the plurality of first portions, the second portion, and the third portion are integrally disposed to form a wound structure.

### Claim 8 (depends on 1)

The electrochemical apparatus according to claim 1, wherein in a third direction perpendicular to the first direction, a width of the electrode assembly is W1, and a width of the first insulating layer is W2, wherein 0.7W1≤W2≤W1.

### Claim 9 (depends on 8)

The electrochemical apparatus according to claim 8, wherein
0.7
W
1
≤
W
2
≤
0.95
W
1
.

### Claim 10 (depends on 9)

The electrochemical apparatus according to claim 9, wherein
0.85
W
1
≤
W
2
≤
0.95
W
1
.

### Claim 11 (depends on 1)

The electrochemical apparatus according to claim 1, wherein each first coating comprises a first inorganic particle layer and a first adhesive layer; the first inorganic particle layer is connected to the substrate layer; and the adhesive layer is disposed on a surface of the inorganic particle layer facing away from the substrate layer and is adhered to an adjacent electrode plate.

### Claim 12 (depends on 1)

The electrochemical apparatus according to claim 1, wherein each first coating comprises inorganic particles and a binder.

### Claim 13 (depends on 1)

The electrochemical apparatus according to claim 1, wherein the electrochemical apparatus further comprises a second insulating layer; the electrode assembly further comprises a second end face connected between the first surface and the second surface; a length direction of the electrode assembly is defined as a second direction; the first surface and the second surface are opposite to each other in the second direction; and the second insulating layer is connected to the first surface, the second surface, and the second end face.

### Claim 14 (depends on 13)

The electrochemical apparatus according to claim 13, wherein the first insulating layer is a single-sided adhesive or a double-sided adhesive, and/or the second insulating layer is a single-sided adhesive or a double-sided adhesive.

### Claim 15 (depends on 1)

The electrochemical apparatus according to claim 1, wherein the electrochemical apparatus further comprises a first metal plate and a second metal plate; the first metal plate and the second metal plate are both connected to the electrode assembly; in a third direction perpendicular to the first direction, the electrode assembly further comprises a second end face opposite to the first end face; and the first metal plate and the second metal plate extend out of the electrode assembly from the second end face.

### Claim 16 (depends on 1)

The electrochemical apparatus according to claim 1, wherein the housing is a packaging bag.

### Claim 17 (depends on 1)

An electric device, comprising the electrochemical apparatus according to claim 1.

### Claim 18 (depends on 17)

The electric device according to claim 17, wherein each first coating is strip-shaped; the substrate layer comprises two side edges opposite to each other in a second direction perpendicular to the first direction; and the first coatings are obliquely arranged with respect to the side edges.

### Claim 19 (depends on 18)

The electric device according to claim 18, wherein when viewed in the first direction, an included angle between the first coating and the side edge is θ1, wherein
25
⁢
°
≤
θ
1
≤
65
⁢
°
.

### Claim 20 (depends on 18)

The electric device according to claim 18, wherein when viewed in the first direction, a width of the first coating is D1, and a spacing between two adjacent first coatings is D2, wherein 0.3D2≤D1≤0.5D2.