US5565759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smart battery providing battery life and recharge time prediction
Assignee: Micron Technology Inc
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Filing: 1994-12-15
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Granted: 1996-10-15
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Expires: 2014-12-15
Abstract
Abstract A smart battery that can predict the remaining life and recharge time of the battery based on battery-specific characteristics. A memory stores battery-specific characteristics, such as charge characteristics, discharge characteristics, capacity characteristics, and self-discharge characteristics. The environmental conditions of the battery, such as temperature, and battery current (charge or discharge) are measured. A microcontroller periodically determines an incremental self-discharge of the battery based on the measured environmental conditions and the self-discharge characteristic of the battery. The microcontroller predicts the remaining battery life of the battery based on the remaining capacity of the battery, the environmental conditions of the battery, and a selected discharge rate of the battery. The discharge rate can be selected by a user, a power management system or by other means. A charge rate of the battery can also be selected. The microcontroller predicts the recharge time of the battery based on the selected charge rate, the present battery capacity, one or more charging characteristics of the battery, and the environmental conditions of the battery (such as battery temperature).
Inventors
- 👤 Robert A. Dunstan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:42
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; H02; H02J; H02J7/00; H02J7/40; H02J7/44; H02J7/485; H02J7/80; H02J7/82; H02J7/84; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/21
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
144 words
An apparatus for predicting a remaining life of a battery based on a selected discharge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic trait, actually storing one or more characteristics of the battery and the selected discharge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; means, coupled to the memory, for selecting the discharge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically updates the remaining capacity value based on the battery current, one or more of the environmental conditions, and one or more of the battery characteristics; and wherein the logic unit predicts the remaining life of the battery based on the remaining capacity value and the selected discharge rate.
Claim 2
Independent Claim
144 words
An apparatus for predicting a remaining life of a battery based on a selected discharge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic trait, actually storing one or more characteristics of the battery and the selected discharge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; means, coupled to the memory, for selecting the discharge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically updates the remaining capacity value based on the battery current, one or more of the environmental conditions, and one or more of the battery characteristics; and wherein the logic unit predicts the remaining life of the battery based on the remaining capacity value and the selected discharge rate.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 further comprising means for indicating the predicted remaining life of the battery.
Claim 4
Dependent Claim
55 words
The apparatus of claim 2 wherein the environmental conditions include a temperature of the battery and the battery characteristics include a self-discharge characteristic as a function of the temperature of the battery, and the logic unit updates the remaining capacity value based on the battery current, the self-discharge characteristic, and the temperature of the battery.
Claim 5
Dependent Claim
27 words
The apparatus of claim 3 wherein the remaining capacity value is also based on a battery capacity characteristic as a function of the temperature of the battery.
Claim 6
Dependent Claim
26 words
The apparatus of claim 2 wherein the environmental conditions include temperature, humidity, and air pressure and the battery characteristics include self-discharge, charging, discharging, and capacity characteristics.
Claim 7
Independent Claim
185 words
An apparatus for indicating a remaining capacity of a battery based on a selected discharge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic unit, actually storing one or more characteristics of the battery and the selected discharge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; an environmental monitor circuit, coupled to the logic unit, for measuring the environmental conditions of the battery; a current measuring circuit, coupled to the logic unit, for measuring the battery current; and means, coupled to the memory, for selecting the discharge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically determines an incremental self-discharge of the battery based on the environmental conditions and the battery characteristics and changes the remaining capacity value according to the incremental self-discharge and the battery current; and wherein the logic unit predicts the remaining battery life of the battery based on the remaining capacity of the battery and the selected discharge rate.
Claim 8
Independent Claim
185 words
An apparatus for indicating a remaining capacity of a battery based on a selected discharge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic unit, actually storing one or more characteristics of the battery and the selected discharge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; an environmental monitor circuit, coupled to the logic unit, for measuring the environmental conditions of the battery; a current measuring circuit, coupled to the logic unit, for measuring the battery current; and means, coupled to the memory, for selecting the discharge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically determines an incremental self-discharge of the battery based on the environmental conditions and the battery characteristics and changes the remaining capacity value according to the incremental self-discharge and the battery current; and wherein the logic unit predicts the remaining battery life of the battery based on the remaining capacity of the battery and the selected discharge rate.
Claim 9
Dependent Claim
17 words
The apparatus of claim 6 further comprising means for indicating the predicted remaining life of the battery.
Claim 10
Dependent Claim
51 words
The apparatus of claim 7 wherein the environmental conditions include a temperature of the battery and the battery characteristics include a self-discharge characteristic as a function of the temperature of the battery, and the logic unit determines the incremental self-discharge based on the self-charge characteristic and the temperature of the battery.
Claim 11
Dependent Claim
27 words
The apparatus of claim 8 wherein the remaining capacity value is also based on a battery capacity characteristic as a function of the temperature of the battery.
Claim 12
Dependent Claim
26 words
The apparatus of claim 9 wherein the environmental conditions include temperature, humidity, and air pressure and the battery characteristics include self-discharge, charging, discharging, and capacity characteristics.
Claim 13
Dependent Claim
20 words
The apparatus of claim 10 wherein the battery characteristics are stored in the form of either a table or algorithum.
Claim 14
Independent Claim
89 words
A method for predicting a remaining life of a battery based on a selected discharge rate, the method comprising the steps of: selecting the discharge rate; determining a present battery capacity based on one or more environmental conditions of the battery and one or more characteristics of the battery, the battery characteristics being functions of the environmental conditions and/or a battery current; predicting the remaining life of the battery based on the selected discharge rate and the present battery capacity; and indicating the predicted remaining life of the battery.
Claim 15
Independent Claim
89 words
A method for predicting a remaining life of a battery based on a selected discharge rate, the method comprising the steps of: selecting the discharge rate; determining a present battery capacity based on one or more environmental conditions of the battery and one or more characteristics of the battery, the battery characteristics being functions of the environmental conditions and/or a battery current; predicting the remaining life of the battery based on the selected discharge rate and the present battery capacity; and indicating the predicted remaining life of the battery.
Claim 16
Dependent Claim
35 words
The method of claim 12 wherein the present battery capacity is based on temperature of the battery, a self-discharge characteristic as a function of temperature, and a battery capacity characteristic as a function of temperature.
Claim 17
Dependent Claim
26 words
The method of claim 12 wherein the environmental conditions include temperature, humidity, and air pressure and the battery characteristics include self-discharge, charging, discharging, and capacity characteristics.
Claim 18
Independent Claim
150 words
An apparatus for predicting a recharge time of a battery based on a selected charge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic unit, actually storing one or more characteristics of the battery and the selected charge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; means, coupled to the memory, for selecting the charge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically updates the remaining capacity value based on the battery current, one or more of the environmental conditions, and one or more of the battery characteristics; wherein the logic unit predicts the recharge time of the battery based on the remaining capacity value, the selected charge rate, and one more charging characteristics of the battery.
Claim 19
Independent Claim
150 words
An apparatus for predicting a recharge time of a battery based on a selected charge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic unit, actually storing one or more characteristics of the battery and the selected charge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; means, coupled to the memory, for selecting the charge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically updates the remaining capacity value based on the battery current, one or more of the environmental conditions, and one or more of the battery characteristics; wherein the logic unit predicts the recharge time of the battery based on the remaining capacity value, the selected charge rate, and one more charging characteristics of the battery.
Claim 20
Dependent Claim
17 words
The apparatus of claim 15 further comprising means for indicating the predicted recharge time of the battery.
Claim 21
Dependent Claim
55 words
The apparatus of claim 16 wherein the environmental conditions include a temperature of the battery and the battery characteristics include a self-discharge characteristic as a function of the temperature of the battery, and the logic unit updates the remaining capacity valued based on the battery current, the self-discharge characteristic, and the temperature of the battery.
Claim 22
Dependent Claim
27 words
The apparatus of claim 17 wherein the remaining capacity value is also based on a battery capacity characteristic as a function of the temperature of the battery.
Claim 23
Dependent Claim
26 words
The apparatus of claim 16 wherein the environmental conditions include temperature, humidity, and air pressure and the battery characteristics include self-discharge, charging, discharging, and capacity characteristics.
Claim 24
Independent Claim
192 words
An apparatus for indicating a recharge time of a battery based on a selected charge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic unit, actually storing one or more characteristics of the battery and the selected charge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; an environmental monitor circuit, coupled to the logic unit, for measuring the environmental conditions of the battery; a current measuring circuit, coupled to the logic unit, for measuring the battery current; and means, coupled to the memory, for selecting the charge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically determines an incremental self-discharge of the battery based on the environmental conditions and the battery characteristics and changes the remaining capacity value according to the incremental self-discharge and the battery current; and wherein the logic unit predicts the recharge time of the battery based on the remaining capacity of the battery, the selected charge rate, and one or more charging characteristics of the battery.
Claim 25
Independent Claim
192 words
An apparatus for indicating a recharge time of a battery based on a selected charge rate, the apparatus comprising: a logic unit; a memory, coupled to the logic unit, actually storing one or more characteristics of the battery and the selected charge rate, the battery characteristics being a function of one or more environmental conditions of the battery and/or a battery current; an environmental monitor circuit, coupled to the logic unit, for measuring the environmental conditions of the battery; a current measuring circuit, coupled to the logic unit, for measuring the battery current; and means, coupled to the memory, for selecting the charge rate; a remaining capacity value stored in the memory, the remaining capacity value representing a remaining capacity of the battery; wherein the logic unit periodically determines an incremental self-discharge of the battery based on the environmental conditions and the battery characteristics and changes the remaining capacity value according to the incremental self-discharge and the battery current; and wherein the logic unit predicts the recharge time of the battery based on the remaining capacity of the battery, the selected charge rate, and one or more charging characteristics of the battery.
Claim 26
Dependent Claim
17 words
The apparatus of claim 20 further comprising means for indicating the predicted recharge time of the battery.
Claim 27
Dependent Claim
51 words
The apparatus of claim 21 wherein the environmental conditions include a temperature of the battery and the battery characteristics include a self-discharge characteristic as a function of the temperature of the battery, and the logic unit determines the incremental self-discharge based on the self-discharge characteristic and the temperature of the battery.
Claim 28
Dependent Claim
27 words
The apparatus of claim 22 wherein the remaining capacity value is also based on a battery capacity characteristic as a function of the temperature of the battery.
Claim 29
Dependent Claim
26 words
The apparatus of claim 20 wherein the environmental conditions include temperature, humidity, and air pressure and the battery characteristics include self-discharge, charging, discharging, and capacity characteristics.
Claim 30
Dependent Claim
20 words
The apparatus of claim 23 wherein the battery characteristics are stored in the form of either a table or algorithm.
Claim 31
Independent Claim
97 words
A method for predicting a recharge time of a battery based on a selected charge rate, the method comprising the steps of: selecting the charge rate; determining a present battery capacity based on one or more environmental conditions of the battery and one or more characteristics of the battery, the battery characteristics being functions of the environmental conditions and/or a battery current; predicting the recharge time of the battery based on the selected charge rate, the present battery capacity, and one or more charging characteristics of the battery; and indicating the predicted remaining life of the battery.
Claim 32
Independent Claim
97 words
A method for predicting a recharge time of a battery based on a selected charge rate, the method comprising the steps of: selecting the charge rate; determining a present battery capacity based on one or more environmental conditions of the battery and one or more characteristics of the battery, the battery characteristics being functions of the environmental conditions and/or a battery current; predicting the recharge time of the battery based on the selected charge rate, the present battery capacity, and one or more charging characteristics of the battery; and indicating the predicted remaining life of the battery.
Claim 33
Dependent Claim
35 words
The method of claim 26 wherein the present battery capacity is based on temperature of the battery, a self-discharge characteristic as a function of temperature, and a battery capacity characteristic as a function of temperature.
Claim 34
Dependent Claim
26 words
The method of claim 26 wherein the environmental conditions include temperature, humidity, and air pressure and the battery characteristics include self-discharge, charging, discharging, and capacity characteristics.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-15 | 2000-04-15 | 2000-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-15 | 2004-04-15 | 2004-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-15 | 2008-04-15 | 2008-10-15 | $7700.00 | Window Closed / Lapsed |