Soft-pack battery module, battery pack, and device using soft-pack battery module

Patent metadata

Field	Value
Publication number	US-2022115752-A1
Application number	US-202117559591-A
Country	US
Kind code	A1
Filing date	Dec 22, 2021
Priority date	Nov 19, 2019
Publication date	Apr 14, 2022
Grant date	—

Abstract

This application discloses a soft-pack battery module, including at least two battery stack layers stacked in a thickness direction of battery cells, where each battery stack layer includes a battery cell and a connecting piece connected to a tab of the battery cell, the connecting piece includes a first split body and a second split body, the first split body is connected to the tab, the second split body is connected to the first split body, the second split body is arranged by a side of the first split body, the second split body extends toward a large surface of the battery cell and covers at least a part of the large surface of the battery cell, and an insulating material is provided on a side of the second split body away from the large surface of the battery cell.

First claim

What is claimed is:

1 . A soft-pack battery module, comprising at least two battery stack layers stacked in a thickness direction of battery cells, wherein each battery stack layer comprises a battery cell and a connecting piece connected to a tab of the battery cell, the connecting piece comprises a first split body and a second split body, the first split body is connected to the tab, the second split body is connected to the first split body, the second split body is arranged by a side of the first split body, the second split body extends toward a large surface of the battery cell and covers at least a part of the large surface of the battery cell, and an insulating material is provided on a side of the second split body away from the large surface of the battery cell.

2 . The soft-pack battery module according to claim 1 , wherein the first split comprises two spaced connecting arms, one of the two connecting arms is connected to a positive tab and the other connecting arm is connected to a negative tab.

3 . The soft-pack battery module according to claim 1 , wherein a length of the second split body is greater than a length of the large surface of the battery cell in an extension direction of the tabs relative to the battery cell, so that the second split body covers the large surface of the battery cell in the extension direction.

4 . The soft-pack battery module according to claim 1 , wherein each of the battery stack layers comprises one or more battery cells.

5 . The soft-pack battery module according to claim 1 , wherein the connecting piece comprises an inter-layer connecting piece and an intra-layer connecting piece, the inter-layer connecting piece is a bent structure for connecting the battery cells at two adjacent battery stack layers, and the intra-layer connecting piece connects the battery cells at a same battery stack layer.

6 . The soft-pack battery module according to claim 5 , wherein the soft-pack battery module further comprises a first insulating film attached to a side of the battery stack layer on which the second split body is provided, the first insulating film comprises a bent insulating film section attached to the inter-layer connecting piece and a planar insulating film section attached to the intra-layer connecting piece, and the bent insulating film section is connected to the planar insulating film section.

7 . The soft-pack battery module according to claim 6 , wherein the soft-pack battery module comprises the first insulating films respectively attached to two sides of the battery stack layer.

8 . The soft-pack battery module according to claim 6 , wherein the soft-pack battery module further comprises a heating film attached to the first insulating film, and the heating film comprises a bent heating film section attached to the bent insulating film section and a planar heating film section attached to the planar insulating film section.

9 . The soft-pack battery module according to claim 8 , wherein the soft-pack battery module further comprises a second insulating film attached to the heating film, and the second insulating film comprises a bent insulating film section attached to the bent heating film section and a planar insulating film section attached to the planar heating film section.

10 . The soft-pack battery module according to claim 6 , wherein the soft-pack battery module further comprises a circuit board, the circuit board comprises a circuit board bent section connected to the inter-layer connecting piece and a circuit board planar section extending along the battery stack layer and connected to the intra-layer connecting piece.

11 . A battery pack, comprising a box body and the soft-pack battery module according to claim 1 , wherein the soft-pack battery module is accommodated in the box body.

12 . A device using a soft-pack battery module as a power source, comprising a driving apparatus and the soft-pack battery module according to claim 1 , wherein the driving apparatus is configured to provide driving power for the device, and the soft-pack battery module is configured to provide electric energy for the driving apparatus.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Wang Yongguang
• You Kaijie
• Chen Xingdi
• Tang Yu
• Wang Zhichao

Classifications

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M50/533 Primary

  characterised by the shape of the leads or tabs · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title

• H01M50/211 Primary

  adapted for pouch cells · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title