发明名称 |
Method and device for estimating charge/discharge electricity amount of secondary cell |
摘要 |
The present invention provides an apparatus that can estimate the charge/discharge electricity amount without being affected by current measurement error. If specific selection conditions are met, a no-load voltage calculation part (105) takes a plurality of pairs of data consisting of current data I(n) and voltage data V(n) corresponding to the current data and calculates a no-load voltage Vsep as the voltage intercept at a current of zero in a straight-line approximation obtained by statistical processing such as regression analysis using a least squares method with respect to the plurality of pairs of data. In addition, if specific current conditions continue to be met for a certain amount of time, an open circuit voltage calculation part (106) calculates the terminal voltage of the secondary battery as the open circuit voltage Voc. An estimated charge/discharge electricity amount calculation part (114) uses a preset change-in-voltage adjustment constant DeltaVbc/adjustment coefficient Kb, change-in-electromotive-force constant Keq and polarization voltage generation constant Kpol to calculate the estimated charge/discharge electricity amount DeltaQe as a function of the change DeltaVb in the no-load voltage or the open circuit voltage over a predetermined period of time.
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申请公布号 |
US7557584(B2) |
申请公布日期 |
2009.07.07 |
申请号 |
US20040565956 |
申请日期 |
2004.07.26 |
申请人 |
PANASONIC EV ENERGY CO., LTD. |
发明人 |
MURAKAMI YUSAI;YAMABE NORITO |
分类号 |
G01N27/416;G01R31/36;H01M10/48;H02J7/00 |
主分类号 |
G01N27/416 |
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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