Overcharge prevention device of battery

Patent metadata

Field	Value
Publication number	US-2015000991-A1
Application number	US-201314051111-A
Country	US
Kind code	A1
Filing date	Oct 10, 2013
Priority date	Jun 28, 2013
Publication date	Jan 1, 2015
Grant date	—

Abstract

An overcharge prevention device of a battery is provided and includes a safety fuse which is connected to a battery and a safety circuit which is connected in parallel to the battery and the safety fuse and includes a short-circuit switch which is disposed adjacent to a side in which the battery is swelled. The short-circuit switch is opened in a normal state, and short-circuits when the switch is pressurized due to the swelling of the battery to form a closed circuit with the battery and the safety fuse.

First claim

What is claimed is:

1 . An overcharge prevention device of a battery, comprising:
a safety fuse connected to a battery; and a safety circuit connected in parallel to the battery and the safety fuse and composed of a short-circuit switch disposed adjacent to a side in which the battery is swelled, wherein the short-circuit switch is opened in a normal state and short-circuits when the switch is pressurized due to the swelling of the battery to form a closed circuit with the battery and the safety fuse.

2 . The overcharge prevention device of a battery according to claim 1 , wherein the safety fuse is interposed between battery packs connected in series, and the safety circuit is connected in parallel to both ends of the battery.

3 . The overcharge prevention device of a battery according to claim 2 , wherein an installation space is formed on the outermost side surface of the battery, and the short-circuit switch is disposed adjacent to the outermost side surface of the battery within the installation space.

4 . The overcharge prevention device of a battery according to claim 2 , wherein a power relay is connected in parallel to both ends of the battery.

5 . An overcharge prevention device of a battery comprising:
a safety fuse and a power relay connected to a battery; a safety circuit connected in parallel to the battery and the safety fuse and composed of a short-circuit switch disposed adjacent to the side in which the battery is swelled; a secondary switch disposed closer to the battery than the short-circuit switch; and a control unit configured to detect a short-circuit of the secondary switch and turn off an OFF switch of the power relay.

6 . The overcharge prevention device of a battery according to claim 5 , wherein the secondary switch is disposed closer to the battery than the short-circuit switch, the secondary switch is pressurized by the battery when the battery is swelled, to short-circuit, and when the battery is continuously swelled, the short-circuit switch short-circuits.

7 . The overcharge prevention device of a battery according to claim 5 , wherein an OFF-switch of the power relay is disposed on a ground line of the power relay.

8 . The overcharge prevention device of a battery according to claim 5 , wherein an installation space is formed on the outermost side surface of the battery, the secondary switch is disposed at a substantially center portion of the installation space, the short-circuit switch is disposed at the side end of the installation space, and the secondary switch short-circuits before the short-circuit switch when the battery is swelled.

9 . The overcharge prevention device of a battery according to claim 5 , wherein the safety fuse is interposed between battery packs connected in series, and the safety circuit is connected in parallel to both ends of the battery.

10 . The overcharge prevention device of a battery according to claim 9 , wherein the power relay is connected in parallel to both ends of the battery.

11 . A vehicle operable in at least an HEV (Hybrid Electric Vehicle) mode and an EV (Electric Vehicle) mode, comprising:
a motor configured to supply power to a transmission in at least an EV mode and an HEV mode; an engine configured to supply power to the transmission in an HEV mode; and a battery that has an overcharge prevention device, including:
a safety fuse connected to a battery; and
a safety circuit connected in parallel to the battery and the safety fuse and composed of a short-circuit switch disposed adjacent to a side in which the battery is swelled,
wherein the short-circuit switch is opened in a normal state and short-circuits when the switch is pressurized due to the swelling of the battery to form a closed circuit with the battery and the safety fuse.

12 . The vehicle of claim 11 , wherein the safety fuse is interposed between battery packs connected in series, and the safety circuit is connected in parallel to both ends of the battery.

13 . The vehicle of claim 12 , wherein an installation space is formed on the outermost side surface of the battery, and the short-circuit switch is disposed adjacent to the outermost side surface of the battery within the installation space.

14 . The vehicle of claim 12 , wherein a power relay is connected in parallel to both ends of the battery.

Assignees

• Kia Motors Corp
• Hyundai Motor Co Ltd

Inventors

• Lim Hae Kyu
• Seo Jeong Hun
• Kim Suk Hyung
• Jeon Yoon Cheol
• Choi Jun Seok
• Kim Eun Kyung

Classifications

• H01M50/583

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

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• H01M10/4257

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

• H02H7/18 Primary

  for batteries; for accumulators · CPC title

• H01M50/578 Primary

  in response to pressure · CPC title