Battery-State Monitoring System
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Abstract
A battery-state monitoring system capable of efficiently estimating the state and service life of each storage battery at high precision by automatically measuring or acquiring various parameters of a plurality of storage batteries constantly connected to an equipment is provided. The system monitors a state of each of a plurality of batteries connected in series and constituting an assembled battery incorporated in an equipment includes a power supply control device that detects a current flowing through each battery; and an end device that measures a temperature, a voltage, and internal resistance of each battery, the internal resistance being measured by using at least two or more kinds of frequencies, and degradation of each battery is estimated based on one or more temperature, voltage, and internal resistance.
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Citations
25 Claims
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1-13. -13. (canceled)
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14. A battery-state monitoring system which monitors a state of each of a plurality of storage batteries connected in series and constituting an assembled battery incorporated in an equipment, the system comprising:
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a current detecting device which detects a current in each of the storage batteries; and a state measuring device which measures a temperature, a voltage, and internal resistance of each of the storage batteries, the internal resistance being measured by using at least two or more kinds of frequencies including at least a first frequency of lower than 200 Hz and a second frequency of 200 Hz or higher to lower than 2000 Hz, wherein degradation of each of the storage batteries is estimated based on at least one or more values of the temperature, the voltage, and the internal resistance measured by the state measuring device and a DC resistance of each of the storage batteries obtained from a ratio between a change in a current value detected by the current detecting device and a change in a voltage value measured by the state measuring device during discharging of each of the storage batteries. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification