US 11,108,118 B2Granted

Cell and electrochemical device

AssigneeNingde Amperex Technology Limited

InventorsXiangrong Chen, Zhiyuan Liu, Huiqin Wang, Ying Wang

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Abstract

The present application discloses a cell and an electrochemical device. The cell includes: a first electrode sheet, a first electrode tab, a second electrode sheet, and a second electrode tab. The first electrode sheet includes a first current collector and a first active material layer. The first current collector includes a first end portion, and two sides of the first end portion are provided with the first active material layer. The second electrode sheet includes a second current collector and a second active material layer. The first end portion has a width being one third of a width of the first electrode tab. In a first direction, the cell has a thickness t at the first end portion, the cell has a thickness T at the first electrode tab or the second electrode tab, and t is greater than or equal to 95% of T.

Claims20

Dependent claims

A cell, comprising:

a first electrode sheet comprising a first current collector and a first active material layer, the first current collector comprising a first end portion;
a first electrode tab electrically connected with the first current collector;
a second electrode sheet comprising a second current collector and a second active material layer, the second active material layer being located on a surface of the second current collector;
and
a second electrode tab electrically connected with the second current collector;
wherein the first end portion consists of an entire portion of the first current collector that extends beyond an adjacent second active material layer, two sides of the first end portion being provided with the first active material layer;
and the first end portion has a width being one third of a width of the first electrode tab;
and in a first direction, the cell has a thickness t at the first end portion, the cell has a thickness T at the first electrode tab or the second electrode tab, and t is greater than or equal to 95% of T.

5 more elements

An electrochemical device, comprising a cell, the cell comprising:

a first electrode sheet comprising a first current collector and a first active material layer, the first current collector comprising a first end portion;
a first electrode tab electrically connected with the first current collector;
a second electrode sheet comprising a second current collector and a second active material layer, the second active material layer being located on a surface of the second current collector;
and
a second electrode tab electrically connected with the second current collector;
wherein the first end portion consists of an entire portion of the first current collector that extends beyond an adjacent second active material layer, two sides of the first end portion being provided with the first active material layer;
and the first end portion has a width being one third of a width of the first electrode tab, and in a first direction, the cell has a thickness t at the first end portion, the cell has a thickness T at the first electrode tab or the second electrode tab, and t is greater than or equal to 95% of T.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/355,399Filed 15 Mar 2019
Priority: CN 201821380497.427 Aug 2018
Published: US 2020/0067063 A127 Feb 2020
Granted: 31 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01M 10/0587
Construction or manufacture: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes…
H01M 50/461
Separators, membranes or diaphragms characterised by their combination with electrodes: with adhesive layers between electrodes and separators
H01M 50/533
Electrode connections inside a battery casing: characterised by the shape of the leads or tabs
H01M 10/0431
Construction or manufacture in general: cells with wound or folded electrodes