Dynamic battery state-of-charge and capacity determination

Details Dynamic battery state-of-charge and capacity determination Dynamic battery state-of-charge and capacity determination

1994-09-26

1996-11-26

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 32, 324426, H02J 704

Patent

active

055789153

ABSTRACT:
A battery pack comprising a plurality of series arranged module has a state-of-charge and capacity associated therewith that are determined through dynamic operation thereof including both charge and discharge cycling. Amp*hour integration techniques are used to update state-of-charge until one of the plurality of modules is deeply discharged, at which time state-of-charge is updated in accordance with measured dynamic battery parameters of the deeply discharged module and capacity is updated in accordance with the newly calculated state-of-charge thereby accounting for capacity loss throughout the pack's cycle life. Alternatively, amp*hour integration techniques are used only at relatively high states of charge and dynamic parameter techniques are employed thereafter.

REFERENCES:
patent: 4595880 (1986-06-01), Patil
patent: 5107191 (1992-04-01), Lowndes et al.
patent: 5432429 (1995-07-01), Armstrong, II et al.
patent: 5473262 (1995-12-01), Yoshimatsu

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