System monitoring the discharging period of the charging/discharging cycles of a rechargeable battery, and host device including a smart battery
First Claim
1. A monitoring system for monitoring the discharging period of the charging/discharging cycles of a battery, coupled to a rechargeable battery which has charging periods alternating with discharging periods as a function of charging/discharging cycles, this system comprising:
- first adaptive calculation means which are arranged for collecting, at an initial instant (to) at the beginning of a discharging period of a charging/discharging cycle of the battery, a predetermined value of a critical discharge voltage threshold (VTH), and for calculating and providing a predictive indication of a critical instant (tTH) at which the battery will reach this predetermined critical discharge voltage threshold (VTH),second adaptive calculation means coupled to the first calculation means, which are arranged for collecting, at the initial instant (to), a measured value of an initial voltage (Vo), of an initial variation (Δ
Vo) of the voltage at a later instant (t'"'"'o) after a short lapse of time (Δ
to) starting from this initial instant (to) onwards, and of the initial number (No) of charging/dischargirg cycles of this battery effected before this initial instant (to), and arranged for calculating and producing from the instant (to+Δ
to) of said discharging period at which the initial values are available onwards, operating parameters which are automatically adapted to the values of the initial measurements and imposed on the first calculation means to improve the accuracy thereof.
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Abstract
A system for monitoring the discharging/charging cycles of a rechargeable battery which includes adaptive calculation means for providing a predictive indication of when the battery will reach a critical discharge voltage. The adaptive calculation means includes parameters which can be modified by other adaptive calculation means so as to optimize the monitor'"'"'s performance depending on the battery'"'"'s actual use. The adaptive calculation means may be neural networks formed by a microprocessor and memory, and the monitor system may be coupled to a host system.
64 Citations
20 Claims
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1. A monitoring system for monitoring the discharging period of the charging/discharging cycles of a battery, coupled to a rechargeable battery which has charging periods alternating with discharging periods as a function of charging/discharging cycles, this system comprising:
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first adaptive calculation means which are arranged for collecting, at an initial instant (to) at the beginning of a discharging period of a charging/discharging cycle of the battery, a predetermined value of a critical discharge voltage threshold (VTH), and for calculating and providing a predictive indication of a critical instant (tTH) at which the battery will reach this predetermined critical discharge voltage threshold (VTH), second adaptive calculation means coupled to the first calculation means, which are arranged for collecting, at the initial instant (to), a measured value of an initial voltage (Vo), of an initial variation (Δ
Vo) of the voltage at a later instant (t'"'"'o) after a short lapse of time (Δ
to) starting from this initial instant (to) onwards, and of the initial number (No) of charging/dischargirg cycles of this battery effected before this initial instant (to), and arranged for calculating and producing from the instant (to+Δ
to) of said discharging period at which the initial values are available onwards, operating parameters which are automatically adapted to the values of the initial measurements and imposed on the first calculation means to improve the accuracy thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification