Battery module

Patent metadata

Field	Value
Publication number	US-2021359370-A1
Application number	US-201916488700-A
Country	US
Kind code	A1
Filing date	Jul 9, 2019
Priority date	Jul 4, 2019
Publication date	Nov 18, 2021
Grant date	—

Abstract

The disclosure provides a battery module, including: two or more battery units, wherein each battery unit includes a battery core including two end portions opposed in a length direction thereof, and the two or more battery units are arranged side by side in a thickness direction of the battery core, in two adjacent battery units, a first gap is formed between two battery cores that are close to each other, and the first gap extends from one of the two end portions along the length direction, and in a direction from the two end portions to a center of the battery core, a dimension of the first gap gradually decreases along the thickness direction; and a cushion pad which is provided between the two adjacent battery units, and the cushion pad is disposed in the first gap and is in contact with the end portion(s) of the battery core.

First claim

1 . A battery module, comprising:
two or more battery units, wherein each battery unit comprises a battery core comprising two end portions opposed in a length direction thereof, and the two or more battery units are arranged side by side in a thickness direction of the battery core, in two adjacent battery units, a first gap is formed between two battery cores that are close to each other, and the first gap extends from one of the two end portions along the length direction, and in a direction from the two end portions to a center of the battery core, a dimension of the first gap gradually decreases along the thickness direction; and a cushion pad, wherein the cushion pad is provided between the two adjacent battery units, and the cushion pad is disposed in the first gap and is in contact with the end portion(s) of the battery core.

2 . The battery module according to claim 1 , wherein the first gap penetrates through in the length direction, the cushion pad comprises a first cushion portion and a second cushion portion; and in the thickness direction, one of the two end portions of the battery core is arranged mutually with the first cushion portion, and the other of the two end portions is arranged mutually with the second cushion portion.

3 . The battery module according to claim 2 , wherein the cushion pad further comprises an intermediate portion which is disposed between the first cushion portion and the second cushion portion and in contact with the battery core.

4 . The battery module according to claim 3 , wherein respective surfaces of the first cushion portion, the second cushion portion, and the intermediate portion facing the battery core are connected to each other and are in smooth transition; and/or
a surface of the battery core where the first gap is formed is arched, and respective surfaces of the first cushion portion, the second cushion portion, and the intermediate portion facing the battery core fit the battery core.

5 . The battery module according to claim 3 , wherein the first cushion portion, the second cushion portion, and the intermediate portion are of an integral structure.

6 . The battery module according to claim 2 , wherein an end face of the first cushion portion is aligned with an end face of the battery core in the length direction, and/or, an end face of the second cushion portion is aligned with the end face of the battery core in the length direction.

7 . The battery module according to claim 2 , wherein in the length direction, a ratio of a dimension of the first cushion portion to a dimension of the battery core is 0.06 to 0.15, and/or a ratio of a dimension of the first cushion portion to the dimension of the battery core is 0.06 to 0.15; or
in a width direction of the battery core, the cushion pad has same dimension as the battery core.

8 . The battery module according to claim 1 , wherein the battery core comprises an electrode assembly and a package, the electrode assembly is disposed in the package, and the electrode assembly comprises a first electrode plate and a second electrode plate that have opposite polarities, the thickness of the first electrode plate and the second electrode plate gradually increases in the direction from the two end portions to the center of the battery core.

9 . The battery module according to claim 1 , wherein
the battery module further comprises a housing within which the two or more battery units are disposed, a second gap is formed between the battery core in the two or more battery units adjacent to the housing and the housing, in the direction from the two end portions to the center of the battery core, a dimension of the second gap in the thickness direction gradually decreases, and the cushion pad is disposed in the second gap and is in contact with the end portion(s) of the battery core.

10 . The battery module according to claim 1 , wherein the two or more battery units comprise two or more battery cores, and a rigid isolation member is disposed between two adjacent battery cores.

Assignees

• Jiangsu Contemporary Amperex Tech Ltd

Inventors

• Wang Yuwen
• Yang Kai
• Lin Guangliang

Classifications

• H01M50/291 Primary

  characterised by their shape · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title