Parallel battery module

Patent metadata

Field	Value
Publication number	US-10193129-B2
Application number	US-201615195972-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Sep 12, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

The present disclosure provides a parallel battery module comprising a plurality of battery cells, a first current collection connector, and a second current collection connector. The plurality of battery cells are in parallel connection. Each battery cell comprises a conducting top cover plate, a first terminal, a conducting connector, a second terminal, a bare cell, a fuse, and a conducting deformable piece. The first current collection connector and the second current collection connector are disposed on the top of the plurality of battery cells, and are electrically connected to the first terminal and the second terminal of the plurality of battery cells, respectively. When the conducting deformable piece of a battery cell deforms and becomes electrically connected to the conducting connector, the electrical connection between said battery cell and other battery cells is broken by blowing the first current collection connector and/or the second current collection connector.

First claim

What is claimed is:

1. A parallel battery module, comprising:
a plurality of battery cells in parallel connection, each battery cell comprising:
a conducting top cover plate;
a first terminal that is assembled to be insulated from the conducting top cover plate;
a conducting connector that is electrically connected to the first terminal and insulated from the conducting top cover plate;
a second terminal that has an opposite polarity to the first terminal and is assembled to be electrically connected to the conducting top cover plate;
a bare cell that is electrically connected to the first terminal and the second terminal;
a fuse that is connected between the first terminal and the bare cell or connected between the second terminal and the bare cell; and
a conducting deformable piece that is electrically connected to the conducting top cover plate and is disposed below the conducting connector, wherein the conducting deformable piece deforms and becomes electrically connected to the conducting connector such that the first terminal and the second terminal are electrically connected to form an external short circuit when an internal gas pressure of a battery cell reaches a certain level;

a first current collection connector disposed on top of said plurality of battery cells and is electrically connected to the first terminals of said plurality of battery cells, wherein the first current collection connector comprises:
a plurality of first connection parts, a total number of the plurality of first connection parts being the same as a total number of the plurality of battery cells, each first connection part being electrically connected to the first terminal of a corresponding battery cell;
a first current collection part; and
one or more first fusing parts connected between the first current collection part and a corresponding first connection part for each of the plurality of first connection parts; and

a second current collection connector disposed on the top of said plurality of battery cells and is electrically connected to the second terminals of said plurality of battery cells,
wherein, when the conducting deformable piece of the battery cell deforms and is electrically connected to the conducting connector, an electrical connection between said battery cell and other battery cells of the plurality of battery cells is broken by blowing the one or more first fusing parts corresponding to said battery cell of the first current collection connector to electrically isolate said battery cell from the other battery cells.

2. The parallel battery module of claim 1 wherein, for one battery cell, a total overcurrent cross sectional area of the one or more first fusing parts connected between one first connection part and the first current collection part is smaller than one half of a contact area between the conducting deformable piece and the conducting connector of said battery cell after the conducting deformable piece deforms to be in contact with the conducting connector.

3. The parallel battery module of claim 1 , wherein each of the one or more first fusing parts is rectangular or S-shaped.

4. A parallel battery module, comprising:
a plurality of battery cells in parallel connection, each battery cell comprising:
a conducting top cover plate;
a first terminal that is assembled to be insulated from the conducting top cover plate;
a conducting connector that is electrically connected to the first terminal and insulated from the conducting top cover plate;
a second terminal that has an opposite polarity to the first terminal and is assembled to be electrically connected to the conducting top cover plate;
a bare cell that is electrically connected to the first terminal and the second terminal;
a fuse that is connected between the first terminal and the bare cell or connected between the second terminal and the bare cell; and
a conducting deformable piece that is electrically connected to the conducting top cover plate and is disposed below the conducting connector, wherein the conducting deformable piece deforms and becomes electrically connected to the conducting connector such that the first terminal and the second terminal are electrically connected to form an external short circuit when an internal gas pressure of a battery cell reaches a certain level;

a first current collection connector disposed on top of said plurality of battery cells and is electrically connected to the first terminals of said plurality of battery cells; and
a second current collection connector disposed on the top of said plurality of battery cells and is electrically connected to the second terminals of said plurality of battery cells,
wherein the second current collection connector comprises:
a plurality of second connection parts, a total number of the plurality of second connection parts being the same as a total number of the plurality of battery cells, each second connection part being electrically connected to the second terminal of a corresponding battery cell;
a second current collection part; and
one or more second fusing parts connected between the second current collection part and a corresponding second connection part for each of the plurality of second connection parts,

wherein, when the conducting deformable piece of the battery cell deforms and becomes electrically connected to the conducting connector, the electrical connection between said battery cell and the other battery cells is broken by blowing the one or more second fusing parts of the second current collection connector corresponding to said battery cell.

5. The parallel battery module of claim 4 , wherein, for one battery cell, a total overcurrent cross sectional area of the one or more second fusing parts connected between one second connection part and the second current collection part is smaller than one half of a contact area between the conducting deformable piece and the conducting connector of said battery cell after the conducting deformable piece deforms to be in contact with the conducting connector.

6. The parallel battery module of claim 4 , wherein each of the one or more second fusing parts is rectangular or S-shaped.

7. A parallel battery module, comprising:
a plurality of battery cells in parallel connection, each battery cell comprising:
a conducting top cover plate;
a first terminal that is assembled to be insulated from the conducting top cover plate;
a conducting connector that is electrically connected to the first terminal and insulated from the conducting top cover plate;
a second terminal that has an opposite polarity to the first terminal and is assembled to be electrically connected to the conducting top cover plate;
a bare cell that is electrically connected to the first terminal and the second terminal;
a fuse that is connected between the first terminal and the bare cell or connected between the second terminal and the bare cell; and
a conducting deformable piece that is electrically connected to the conducting top cover plate and is disposed below the conducting connector, wherein the conducting deformable piece deforms and becomes electrically connected to the conducting connector such that the first terminal and the second terminal are electrically connected to form an external short circuit when an internal gas pressure of a battery cell reaches a certain level;

a first current collection connector disposed on top of said plurality of battery cells and is electrically connected to the first terminals of said plurality of battery cells; and
a second current collection connector disposed on the top of said plurality of battery cells and is electrically connected to the second terminals of said plurality of battery cells,
wherein:
the first c

Assignees

• Ningde Contemporary Amperex Tech Limited
• Contemporary Amperex Technology Co Ltd

Inventors

• Li Quankun
• Deng Pinghua
• Wu Kai
• Chen Xiaobo
• Wang Peng

Classifications

• H01M50/583

  in response to current, e.g. fuses · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title

• H01M50/50 Primary

  Current conducting connections for cells or batteries · CPC title

• H01M50/512

  Connection only in parallel · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title