发明名称 |
Method and apparatus for detecting failed batteries |
摘要 |
A technique for detecting failed batteries while the battery is attached to one or more electronic devices and is receiving a float charge is disclosed. The float voltage minimizes the normal voltage differences between battery cells. The technique employs a ratio comparative analysis of cell voltages of a battery provided across the terminals of the battery. Application of the ratio comparative analysis in assessing the condition of a battery assumes an equal voltage drop across each battery cell such that the cells are modeled as a series of resisters with respect to the float voltage. Such equal voltage drop enables a comparative ratio analysis of the voltage across each of the two portions of the battery's cell stack to the voltage across the entire battery. The comparative ratio analysis determines a voltage threshold that identifies whether a battery has a shorted or open cell.
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申请公布号 |
US6020743(A) |
申请公布日期 |
2000.02.01 |
申请号 |
US19970955433 |
申请日期 |
1997.10.21 |
申请人 |
COMPAQ COMPUTER CORPORATION |
发明人 |
REEVES, LARRY D.;SETO, KAN-CHIU;TRAN, DUNG A. |
分类号 |
G01R31/36;(IPC1-7):G01N27/416 |
主分类号 |
G01R31/36 |
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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