초록 ▼

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery and a processor for monitoring the battery during charging and discharging. The processor receives data values representing the battery voltage, temperature and current, and the processor perf

A battery pack and a method of operating a battery system. The battery pack includes a rechargeable battery and a processor for monitoring the battery during charging and discharging. The processor receives data values representing the battery voltage, temperature and current, and the processor performs a series of calculations using those data values. The processor has normal, standby and sleep modes. In the normal mode, the processor performs the series of calculations at first regular cycles, and in the standby mode, the processor performs the series of calculations at second regular cycles, which are longer than the first cycles. Preferably, the processor enters the standby mode when the battery current falls below a predetermined current level, and the processor enters the sleep mode when the battery voltage falls below a first predetermined voltage level. Also, the processor exits the sleep mode when the battery voltage rises above a second predetermined voltage level higher than the first predetermined voltage level.

대표청구항 ▼

A smart battery having a power management system capable of self powered operation, even when nominally fully discharged, said smart battery comprising: (a) a plurality of rechargeable cells connected to a pair of terminals to provide electrical power to an external device during a discharge mode an

A smart battery having a power management system capable of self powered operation, even when nominally fully discharged, said smart battery comprising: (a) a plurality of rechargeable cells connected to a pair of terminals to provide electrical power to an external device during a discharge mode and to receive electrical power during a charge mode, as provided or determined by said remote device; (c) an analog means for generating analog signals representative of battery voltage, temperature and current at said terminals, (d) a hybrid integrated circuit (IC) having an analog to digital convertor, a first clock and a microprocessor having a first algorithm for sampling the analog signals at a first period and converting them to digital signals representative of battery voltage, current and temperature; a second algorithm for sampling the analog signals at predetermined intervals of said first period when battery current has dropped below a predetermined value; and a third algorithm for disabling said analog to digital convertor, said first clock and said microprocessor when the battery voltage drops below a predetermined sleep mode value; (e) a data memory defined within said hybrid IC for storing a plurality of calculated charge parameters, even when said battery is nominally fully discharged, said charge parameters including at least a learned full charge capacity and remaining capacity, (f) a second clock means for initializing said first clock and said microprocessor during said first and said second algorithm, said clock means also initializing a comparator circuit for enabling a start signal for said microprocessor, said first clock and said analog to digital convertor whenever said battery voltage rises above a predetermined value.