Device for cell-by-cell equalizing capacities of battery-forming series-connected nickel-hydrogen cells. RU patent 2280299.

FIELD: electrical engineering; storage batteries for space vehicles.

SUBSTANCE: proposed device has contact for connection to extreme terminals of storage battery, 2n output terminals, variable-voltage generator with transformer output, n controlled rectifiers whose outputs are connected to respective like-polarity terminals of cells, n strain gages, first and second switches, instrumentation amplifier, analog-to-digital converter, microprocessor, and control voltage supply. Outputs of strain gages are connected to n inputs of first switch whose output is connected to input of instrumentation amplifier and output of the latter, to input of analog-to-digital converter. Output of analog-to-digital converter is connected to microprocessor data bus which is connected to control inputs of first and second switches. Input of first switch is connected to output of control voltage supply and n outputs of second switch, to control inputs of n controlled rectifiers. Device provides for enhancing cycling intensity and eliminating polarity reversal of so-called weak cells thereby reducing drop in battery capacity with time, this being equivalent to enhancement of effective capacity by end of space vehicle active life.

EFFECT: enhanced precision of equalizing capacity of battery cells at minimal power requirement.

2 cl, 2 dwg

IPC classes for russian patent Device for cell-by-cell equalizing capacities of battery-forming series-connected nickel-hydrogen cells. RU patent 2280299. (RU 2280299):

H02J7/04 - Regulation of the charging current or voltage

H01M10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells

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Device for cell-by-cell equalizing capacities of battery-forming series-connected nickel-hydrogen cells / 2280299
Proposed device has contact for connection to extreme terminals of storage battery, 2n output terminals, variable-voltage generator with transformer output, n controlled rectifiers whose outputs are connected to respective like-polarity terminals of cells, n strain gages, first and second switches, instrumentation amplifier, analog-to-digital converter, microprocessor, and control voltage supply. Outputs of strain gages are connected to n inputs of first switch whose output is connected to input of instrumentation amplifier and output of the latter, to input of analog-to-digital converter. Output of analog-to-digital converter is connected to microprocessor data bus which is connected to control inputs of first and second switches. Input of first switch is connected to output of control voltage supply and n outputs of second switch, to control inputs of n controlled rectifiers. Device provides for enhancing cycling intensity and eliminating polarity reversal of so-called weak cells thereby reducing drop in battery capacity with time, this being equivalent to enhancement of effective capacity by end of space vehicle active life.

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