METHOD FOR CHECKING TIGHTNESS OF METAL-HYDROGEN BATTERY Russian patent published in 2005 - IPC

FIELD: electrical engineering; servicing metal-hydrogen batteries including their checking for tightness.

SUBSTANCE: proposed method for checking tightness of metal-hydrogen battery includes measurement of pressure within battery case and temperature on its surface; comparison of measured values with maximum permissible ones; estimation of its tightness by making sure that measured parameters are kept within permissible range; measurement of gas space volume; evaluation of battery case expansion ratio for measured temperatures and pressure; determination of battery degree of charge within which only hydrogen is liberated during charging period; battery charging within mentioned range at the same time measuring rated charge current and degree of battery charge within hydrogen liberation range; evaluation of mean volumetric temperature of hydrogen in battery case; evaluation of hydrogen flow due to electrochemical reaction Q_ech within battery by measured charge current and mentioned mean volumetric temperatures of hydrogen; evaluation of hydrogen barometric flow Q_bar within battery by measured values of battery gas space volume, temperatures on its case, and pressure within case, evaluated expansion ratios of battery case for mentioned measured temperatures and pressures; battery tightness is found adequate if condition Q_ech - Q_bar ≤ Q_p, is satisfied, where Q_p is permissible value of battery leakage. In this way in-service checking of battery tightness is made by hydrogen leakage within permissible level of battery sensitivity.

EFFECT: enhanced reliability of in-service hydrogen leakage evaluation within permissible level of battery sensitivity.

1 cl, 5 dwg