发明名称 |
Battery control apparatus, electric vehicle, and computer-readable medium storing a program that causes a computer to execute processing for estimating a state of charge of a secondary battery |
摘要 |
The present invention can speedily and accurately estimate an SOC of a secondary battery immediately after a charge/discharge operation resumes. A determination unit determines whether a dormant period is longer than a predetermined time in response to an initiation of power supply from a secondary battery to a motor generator. The dormant period is equivalent to the duration from a previous stop of power supply to a present initiation of power supply. If the dormant period is longer than the predetermined time, a state-of-charge estimating unit sets an initial SOC based on a peak battery voltage drop &Dgr;Vs and a peak discharge current Is, wherein the peak battery voltage drop &Dgr;Vs represents a difference between a battery voltage Vo measured before initiating power supply and a lowest battery voltage Vs measured after initiating power supply and the peak discharge current Is represents a maximum current value measured after initiating power supply. The state-of-charge estimating unit estimates a state of charge of the secondary battery 30 based on the initial SOC as a value effective immediately after initiating power supply.
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申请公布号 |
US7893652(B2) |
申请公布日期 |
2011.02.22 |
申请号 |
US20070849215 |
申请日期 |
2007.08.31 |
申请人 |
PANASONIC EV ENERGY CO., LTD. |
发明人 |
SUZUKI MASAHIKO;TOGASHI KOUTA;UEMURA YUKIE;KANAMARU KUNIO |
分类号 |
H02J7/00;B60L3/00;B60R16/04;G01R31/36;H01M10/44;H01M10/46;H01M10/48;H02J7/14 |
主分类号 |
H02J7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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