Secondary battery pack having pcm

Patent metadata

Field	Value
Publication number	US-2016233479-A1
Application number	US-201415023868-A
Country	US
Kind code	A1
Filing date	Aug 6, 2014
Priority date	Sep 27, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

Disclosed herein is a secondary battery pack including an anode terminal and a cathode terminal of a battery cell connected to a protection circuit module (PCM), the anode terminal and the cathode terminal of the battery cell being made of plate-shaped conductive members, the battery cell having the anode terminal and the cathode terminal formed at one end thereof, the battery cell having a thermally bonded surplus part formed at the end thereof at which the anode terminal and the cathode terminal are formed, and the PCM including a protection circuit board (PCB) having a protection circuit formed thereon, an external input and output terminal connected to the protection circuit of the PCB, and an electrically insulative PCM case configured to have a hollow structure in which the PCB is mounted, the PCM case being provided with a slit, through which the electrode terminals of the battery cell are inserted, the PCM being loaded on the thermally bonded surplus part of the battery cell in a state in which the PCM is electrically connected to the battery cell.

First claim

1 . A secondary battery pack comprising:
an anode terminal and a cathode terminal of a battery cell connected to a protection circuit module (PCM), the anode terminal and the cathode terminal of the battery cell being made of plate-shaped conductive members; the battery cell having the anode terminal and the cathode terminal formed at one end thereof, the battery cell having a thermally bonded surplus part formed at the end thereof at which the anode terminal and the cathode terminal are formed; and the PCM comprising a protection circuit board (PCB) having a protection circuit formed thereon, an external input and output terminal connected to the protection circuit of the PCB, and an electrically insulative PCM case configured to have a hollow structure in which the PCB is mounted, the PCM case being provided with a slit, through which the electrode terminals of the battery cell are inserted, the PCM being loaded on the thermally bonded surplus part of the battery cell in a state in which the PCM is electrically connected to the battery cell.

2 . The secondary battery pack according to claim 1 , wherein the battery cell is a secondary battery having an electrode assembly comprising a separator disposed between a cathode and an anode mounted in a battery case made of a laminate sheet comprising a metal layer and a resin layer in a sealed state.

3 . The secondary battery pack according to claim 1 , wherein the PCM case wraps the PCM excluding the external input and output terminal.

4 . The secondary battery pack according to claim 1 , wherein the PCM case is formed in the shape of a quadrangular bar having a hollow structure.

5 . The secondary battery pack according to claim 4 , wherein the PCM case is configured to have a structure in which the quadrangular bar is open at opposite ends thereof.

6 . The secondary battery pack according to claim 4 , wherein the PCM case is configured to have a structure in which one end of the quadrangular bar is open and the other end of the quadrangular bar is closed.

7 . The secondary battery pack according to claim 4 , wherein the PCM case is configured to have a structure in which a slit is formed at an edge of one side of the quadrangular bar.

8 . The secondary battery pack according to claim 1 , wherein the anode terminal and the cathode terminal of the battery cell and the external input and output terminal of the PCM are inserted through a slit from one end of the PCM case such that the PCB is mounted into the PCM case.

9 . The secondary battery pack according to claim 8 , wherein the PCB is mounted into the PCM case in a sliding fashion.

10 . The secondary battery pack according to claim 1 , further comprising a label attached to the PCM, excluding the external input and output terminal, and the battery cell in a wrapping fashion.

11 . The secondary battery pack according to claim 10 , wherein the label is attached to the PCM, excluding the external input and output terminal, and thermally bonded edges of opposite sides of the battery cell in a wrapping fashion.

12 . The secondary battery pack according to claim 1 , wherein the battery cell is a lithium secondary battery.

13 . A device comprising a secondary battery pack according to claim 1 as a power source.

14 . The device according to claim 13 , wherein the device is selected from among a mobile phone, a portable computer, a smart phone, a smart pad, a tablet PC, and a netbook computer.

15 . A method of manufacturing a secondary battery pack according to claim 1 , the method comprising:
(a) connecting a nickel plate to a cathode terminal of a battery cell by welding; (b) connecting an anode terminal and the cathode terminal of the battery cell to an anode terminal joint part and a cathode terminal joint part formed at a PCB, respectively, by welding; (c) inserting the electrode terminals of the battery cell through a slit such that the PCB is mounted into a PCM case in a sliding fashion; (d) bending the electrode terminals of the battery cell and mounting the PCM at the thermally bonded surplus part of the battery cell; and (e) wrapping the PCM, excluding the external input and output terminal and a top of the PCM, and the battery cell in a label.

Assignees

• Lg Chemical Ltd

Inventors

• Ahn Soo Jun
• Lee Dong Cheol
• Kim Tae Wook

Classifications

• H01M2200/106

  PTC · CPC title

• H01M10/4257 Primary

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title