Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-02-01
1998-05-12
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340635, 340661, 324426, 324429, 324430, G08B 2100
Patent
active
057512175
ABSTRACT:
Available battery life of a rechargeable battery is assessed and indicated to a user (300). A temporary load is switched onto a fully charged battery (304, 308) and voltage measurements are taken in both unloaded and loaded conditions (306, 310). The battery's internal impedance is determined (312) based on the measured voltages and is compared to a predetermined threshold (314). The predetermined threshold is set based on a value representing a selected minimum available capacity of the battery. An indicator alerts the user as to the status (316, 318) of the available battery life of the battery.
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Ford Robert B.
Kchao Sokphal
Doutre Barbara R.
Hofsass Jeffery A.
Mannava Ashok
Motorola Inc.
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