发明名称 |
Means for detecting the integrated value of current flow, a means for detecting the value of current flow and a battery pack employing those means |
摘要 |
An apparatus for detecting an integrated value of current flow. The apparatus includes an integrator having an integration capacitor, to which a current sensor voltage is inputted, for outputting an output voltage corresponding to an integrated value of the current sensor voltage, and a resetting circuit for clearing integration electric charges accumulated in the integration capacitor to reset the integrator when the output voltage has reached an upper threshold value or a lower threshold value. The apparatus also includes a counter for counting the number of resets of the integrator in an upper direction or in a lower direction, and a connection-polarity inverting circuit for inverting a polarity of inputting of the current sensor voltage to the integrator, a polarity of connecting of the integration capacitor to the integrator and a counting direction of the counter, alternatively, at a regular time interval and synchronously. An integrated value of current flow is obtained on the basis of a count value of the counter.
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申请公布号 |
US6285164(B1) |
申请公布日期 |
2001.09.04 |
申请号 |
US20000709431 |
申请日期 |
2000.11.13 |
申请人 |
HITACHI, LTD.;HITACHI MAXELL, LTD.;HITACHI ULSI SYSTEMS CO., LTD. |
发明人 |
NODA MASARU;TAKEUCHI TAKASHI;TANAKA SHINJI;TSUCHIYA MITSUNORI;YAMAGUCHI TAKESHI |
分类号 |
G01R31/36;(IPC1-7):H02J7/00 |
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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