OPERATING METHOD FOR NICKEL-HYDROGEN BATTERIES IN POWER SUPPLY SYSTEM OF SPACECRAFT Russian patent published in 2015 - IPC H01M10/44 

FIELD: electricity.

SUBSTANCE: invention can be applied in operation of nickel-hydrogen accumulator batteries (AB) in autonomous power supply systems (PSS) of spacecrafts operating at low circumterrestrial orbit. Operation method for nickel-hydrogen accumulator batteries (AB) of spacecraft power supply system involves two or more batteries cycling in charge-discharge mode set by the onboard automation of power supply system, parameter monitoring for each battery, such as current electric capacity, voltage, temperature, regular (once in 6-9 months) prohibition of charging for one of the AB to perform forming cycle, with onboard equipment used as discharge load, AB voltage value selected as a criterion limiting discharge depth, so that border level of voltage is set in Volts, equal to the number n or (n+1) of accumulators in the battery, upon achievement of which an AB charging prohibition is released, and maximum AB voltage for charging, determined during completion of forming cycle, is used for assessment of battery state and battery degradation forecast; similar procedure is repeated for the next AB with the only difference that battery charging degree is limited either by unconditional logics of hardware or by conditional logics of software, where AB charging control by conditional logic is selected as the main variant, and unconditional logic is assigned as a backup variant, AB disconnection from charging by unconditional logic is performed when gas medium pressure in the AB exceeds i^th threshold value selected as operational value out of multiple discrete preset threshold pressure values, and transition to another operational threshold pressure value out of this multitude is performed by one-time command depending on AB temperature, and AB disconnection from charging by conditional logic is controlled discretely upon transition between temperature ranges and smoothly within each temperature range, using a linear equation system depending on temperature t and applicable in a particular relevant range of AB temperature change.

EFFECT: improved functioning reliability of nickel-hydrogen batteries by operation life extension and longer routine operation.

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