Patent US5166623A successfully refreshed from Google Patents.
US5166623A
Expired / Lapsed
US
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Method for indicating battery capacity
Assignee: Motorola Solutions Inc
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Filing: 1991-03-04
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Granted: 1992-11-24
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Expires: 2011-03-04
Abstract
Abstract Battery capacity in a portable two-way radio is determined by measuring the voltage across the battery at predetermined time intervals and determining battery voltage slopes. Each battery voltage slope is compared with a previously determined battery voltage slope and the battery capacity is determined by analyzing the changing pattern of the battery voltage slopes.
Inventors
- 👤 Christopher Ganio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:50
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/36; G01R31/3644; G01R31/3648; G01R31/382; G01R31/3835; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A method for determining battery capacity comprising the steps of: measuring battery voltages at predetermined time intervals; determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; continuously comparing each battery voltage slope with a previously determined battery voltage slope; indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 2
Independent Claim
88 words
A method for determining battery capacity comprising the steps of: measuring battery voltages at predetermined time intervals; determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; continuously comparing each battery voltage slope with a previously determined battery voltage slope; indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 3
Dependent Claim
150 words
In a battery having a capacity characteristic separated into a full capacity region, an intermediate capacity region, and an empty capacity region, wherein said full capacity region has a substantially decreasing battery voltage slope, and said intermediate capacity region has a substantially constant battery voltage slope, and said empty capacity region has a substantially increasing battery voltage slope; a method for determining battery capacity comprising the steps of: measuring battery voltage provided by said battery at predetermined time intervals; determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; continuously comparing each battery voltage slope with a previously determined battery voltage slope; indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 4
Dependent Claim
150 words
In a battery having a capacity characteristic separated into a full capacity region, an intermediate capacity region, and an empty capacity region, wherein said full capacity region has a substantially decreasing battery voltage slope, and said intermediate capacity region has a substantially constant battery voltage slope, and said empty capacity region has a substantially increasing battery voltage slope; a method for determining battery capacity comprising the steps of: measuring battery voltage provided by said battery at predetermined time intervals; determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; continuously comparing each battery voltage slope with a previously determined battery voltage slope; indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 5
Independent Claim
101 words
An apparatus for determining battery capacity comprising: means for measuring battery voltages provided by said battery at predetermined time intervals; means for determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; means for continuously comparing each battery voltage slope with a previously determined battery voltage slope; means for indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; means for indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and means for indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 6
Independent Claim
101 words
An apparatus for determining battery capacity comprising: means for measuring battery voltages provided by said battery at predetermined time intervals; means for determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; means for continuously comparing each battery voltage slope with a previously determined battery voltage slope; means for indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; means for indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and means for indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 7
Dependent Claim
159 words
In a battery having a capacity characteristic separated into a full capacity region, an intermediate capacity region, and an empty capacity region, wherein said full capacity region has a substantially decreasing battery voltage slope, and said intermediate capacity region has a substantially constant battery voltage slope, and said empty capacity region has a substantially increasing battery voltage slope; an apparatus for determining battery capacity comprising: means for measuring battery voltages provided by said battery at predetermined time intervals; means for determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; means for continuously comparing each battery voltage slope with a previously determined battery voltage slope; means for indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; means for indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and means for indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
Claim 8
Dependent Claim
159 words
In a battery having a capacity characteristic separated into a full capacity region, an intermediate capacity region, and an empty capacity region, wherein said full capacity region has a substantially decreasing battery voltage slope, and said intermediate capacity region has a substantially constant battery voltage slope, and said empty capacity region has a substantially increasing battery voltage slope; an apparatus for determining battery capacity comprising: means for measuring battery voltages provided by said battery at predetermined time intervals; means for determining battery voltage slopes by comparing each battery voltage with a previously measured battery voltage; means for continuously comparing each battery voltage slope with a previously determined battery voltage slope; means for indicating a substantially full battery capacity if said battery voltage slopes are substantially decreasing; means for indicating a substantially intermediate battery capacity if said battery voltage slopes are substantially constant; and means for indicating a substantially empty battery capacity if said battery voltage slopes are substantially increasing.
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