Method and system for pulse charging of a lithium-based battery

Details Method and system for pulse charging of a lithium-based battery Method and system for pulse charging of a lithium-based battery

2005-05-24

2008-09-16

Tso, Edward (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Pulsed

Reexamination Certificate

active

07425816

ABSTRACT:
A combination including a battery pack and a battery charger operable to supply a charging current to the battery pack. The battery pack includes a plurality of battery cells having a lithium-based chemistry and a present state of charge. The battery pack also includes a battery microcontroller that is operable to measure the present state of charge of at least one of the battery cells to produce battery cell present state of charge measurements. The battery charger includes a charger microcontroller that is operable to receive the battery cell present state of charge measurements from the battery microcontroller. The charger microcontroller is also operable to supply the charging current to the battery pack in pulses, wherein each pulse includes a first time interval where charging current is being supplied to the battery and a second time interval where charging current is being suspended from the battery.

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“Charging efficiency vs. cell aging in Li+ pulse chargers,”Maxim/Dallas Semiconductor Engineering Journal, vol. 46, p. 3-7, Maxim Integrated Products, 2003.

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