Battery management system
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United States of America Patent
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-
Dec 31, 2002
Grant Date -
N/A
app pub date -
Jul 20, 2000
filing date -
Oct 13, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A battery management system is provided having a battery management unit (BMU) and an integrated switch and sense device (SSD) for accurately measuring the charge state of a rechargeable battery and providing charge protection for the rechargeable battery. The system includes a load, a integrated power and sense device including a power device and a sense device, the integrated power and sense device connected between the rechargeable battery and the load wherein the sense device provides a mirror current proportional to the current in the power device, a first circuit that measures the rechargeable battery current using the mirror current, and a second circuit that measures the charge in the rechargeable battery using the mirror current.
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