Battery passivation management system
AssigneePhase IV Engineering Inc.
InventorScott David Dalgleish
Life of this patent
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Abstract
Described is a battery de-passivation circuit that generally comprises a battery having a de-passivation circuit attached across its positive and negative terminals. The de-passivation circuit includes a switch that can open or close the de-passivation circuit, a resistor that can regulate the amount of current drawn from the battery and a clock and timer controller system that controls the switch. The controller system controls closing the circuit long enough to bring the passivation level build-up within the battery to an acceptable lower level and controls opening the circuit long enough to allow passivation levels to build-up to an acceptable upper level.
Claims20
A battery de-passivation method comprising:
- providing a battery operated electronic device that houses a battery connected to a dedicated de-passivation circuit, said de-passivation circuit switching between a de-passivation state and a passivation state,
- setting said de-passivation circuit to said passivation state, when in said passivation state, battery passivation accumulates in said battery over a period of time;
- while in said passivation state, after a predetermined upper limit of said battery passivation is in said battery, turning said de-passivation circuit from said passivation state to said de-passivation state;
- holding said de-passivation circuit in said de-passivation state until a predetermined lower limit of said battery passivation is in said battery;
- and
- after said holding step, re-settings said de-passivation circuit to said passivation state, said upper limit comprising more of said battery passivation in said battery then said lower limit.
A method for de-passivate a battery with the de-passivation circuit, the method comprising:
- connecting a first electrical lead to a positive terminal on the battery and a second electrical lead to a negative terminal on the battery;
- providing a resistor in-line with the first electrical lead and the second electrical lead;
- de-passivating the battery to a predetermined de-passivation level by electrically connecting the first electrical lead with the second electrical lead to form a closed-circuit for a closed-circuit amount of time, a clock and timer controller controlling electrically connecting the first electrical lead with the second electrical lead for a closed-circuit amount of time;
- passivating the battery to a predetermined passivation level by electrically disconnecting the first electrical lead with the second electrical lead to form an open-circuit for an open-circuit amount of time via the clock and timer controller.
A battery de-passivation method comprising:
- providing a battery operated electronic device that comprises a battery and a dedicated de-passivation circuit,
- said de-passivation circuit comprising a first electrical lead connected to a positive terminal of said battery and a second electrical lead connected to a negative terminal of said battery,
- said de-passivation circuit further comprising a switch that is in an open state causing said first electrical lead to be disconnected from said second electrical lead;
- holding said de-passivation circuit in said open state over a first period of time putting said battery in a passivation state, during said open state accumulating passivation build-up in said battery;
- after said first period of time, connecting said first electrical lead with said second electrical lead forming a closed state for said de-passivation circuit;
- maintaining said closed state for a second period of time, during said second period of time at least partially dissipating said passivation build-up in said battery, said first period of time and said second period of time are established by either predetermined amounts of time or sampling resistance across said battery.
Dependencies are inferred from the claim text.