Title:
BATTERY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/061461
Kind Code:
A1
Abstract:
In the present invention, an ECU outputs address information to a battery monitoring AFE (6) when it is determined that there is a battery cell requiring charging. The battery monitoring AFE (6) turns on a transistor (T2) identified by the address information and outputs an active ON/OFF signal to a balancing circuit (4). The balancing circuit (4) is provided with DC converters (30) respectively connected to each battery cell (2a), and the battery cells are selectively charged by means of the operation of the DC converter (30) to which the ON/OFF signal is input. The DC converters (30) comprise magnetic amplifier style forward converters, and when the ON/OFF signal is active, if the voltage of a battery cell is lower than about 4.2 V, selectively charge the battery cell with the lowest cell voltage, ultimately maintaining the cell voltage at about 4.2 V and preventing overcharging of the battery cells (2a).
Inventors:
HAYAKAWA HIROHIKO (JP)
Application Number:
PCT/JP2011/074951
Publication Date:
May 02, 2013
Filing Date:
October 28, 2011
Export Citation:
Assignee:
RENESAS ELECTRONICS CORP (JP)
HAYAKAWA HIROHIKO (JP)
HAYAKAWA HIROHIKO (JP)
International Classes:
H02J7/02; H02J7/00
Foreign References:
| JP2011501639A | 2011-01-06 | |||
| JP2009540793A | 2009-11-19 | |||
| US7615966B2 | 2009-11-10 | |||
| US5710504A | 1998-01-20 |
Other References:
JOURNAL OF POWER ELECTRONICS, vol. 9, no. 3, May 2009 (2009-05-01), pages 472
See also references of EP 2773014A4
See also references of EP 2773014A4
Attorney, Agent or Firm:
TSUTSUI, Yamato et al. (JP)
Tsutsui Daiwa (JP)
Tsutsui Daiwa (JP)
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Claims: