Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1992-03-09
1994-09-06
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
324430, 340636, G08B 2100
Patent
active
053451635
ABSTRACT:
A battery monitoring method and apparatus are used for monitoring the charge level of a rechargeable electric storage battery, for example a lead acid battery. The counter-voltage of the battery is monitored by continuously monitoring the actual terminal voltage of the battery. When the battery is fully charged, the monitor provides a "DO NOT CHARGE" signal, for example a green light. When the charge level has dropped to a point that there may be some value in recharging the battery, the "DO NOT CHARGE" signal is replaced with an "OK TO CHARGE" signal, for example a yellow light. When the battery has discharged to the point where the battery must be recharged in order to avoid damage, the "OK TO CHARGE" signal is replaced with a "MUST CHARGE" signal, for example a red light. Audible signals may accompany the "OK TO CHARGE" and "MUST CHARGE" signals. The monitor is self-testing when turned on. It automatically recognizes the charge level of a battery to which it is connected. When used in association with, for example, a lift truck , the monitor may include a lift lock-out function that is engaged in response to the battery being discharged to the "MUST CHARGE" level.
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patent: 3932797 (1976-01-01), York
patent: 3940679 (1976-02-01), Brandwein et al.
patent: 3979657 (1976-09-01), Yorksie
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patent: 4024523 (1977-05-01), Arnold et al.
patent: 4803459 (1989-02-01), Ta
Gibbons Gerard P.
Tabler Lyle V.
Battery Master Inc.
Hickey R. J.
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