BATTERY MANAGEMENT DEVICE AND POWER SUPPLY DEVICE

Title:

BATTERY MANAGEMENT DEVICE AND POWER SUPPLY DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/087487

Kind Code:

A1

Abstract:

The present invention detects, with a high degree of accuracy, a break in voltage detection lines connected to a battery pack and a plurality of cascade-connected voltage detection circuits and maintains an SOC balance between the battery cells of the battery pack. A plurality of cascade-connected voltage detection ICs (1-4) detect, via a plurality of voltage detection lines, the voltages of a plurality of serially connected battery cells that compose a battery pack. The plurality of voltage detection ICs (1-4) operate by receiving power from the battery pack. The plurality of voltage detection ICs (1-4) are connected by communication lines, and at least one of the plurality of voltage detection ICs (1-4) is connected to a control circuit (7). First to third dummy resistors (R1-R3) are connected to the voltage detection ICs (1-3) from among the plurality of voltage detection ICs (1-4) that do not directly communicate with the control circuit (7). First to third switches (S1-S3) respectively turn the supply of current to the first to third dummy resistors (R1-R3) on and off.

Inventors:

FURUKAWA KIMIHIKO
MATSUBARA TOMOYUKI

Application Number:

PCT/JP2014/005766

Publication Date:

June 18, 2015

Filing Date:

November 18, 2014

Export Citation:

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Assignee:

SANYO ELECTRIC CO (JP)

International Classes:

H02J7/02; G01R31/36

Domestic Patent References:

WO2011135868A1

2011-11-03

Foreign References:

JP2010025824A	2010-02-04
JP2009232671A	2009-10-08
JP2012161182A	2012-08-23