Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Patent
1991-05-31
1993-08-31
Strecker, Gerard R.
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
324433, 340636, 320 48, G01N 2742, H02J 700
Patent
active
052412750
ABSTRACT:
The remaining capacity of a storage cell, particularly a valve regulated lead-acid cell, is determined by measuring its impedance at typically two or three relatively low frequencies f, e.g., frequencies in the approximate range of 0.001 to 1.0 Hz. In one application, the imaginary part Z" of the complex impedance Z(=Z'+jZ") is plotted vs. f.sup.-1/2, whereby the intercept Z".sub.o (at f.sup.-1/2 =0) of the bestfitting straight line of the plot is a measure of the cell's remaining capacity. In another application, the slope (dZ"/dZ') of a plot of the imaginary part Z" vs. real part Z' of the complex impedance Z, again as measured at relatively low frequencies f, is a measure of the cell's remaining capacity.
REFERENCES:
patent: 3808487 (1974-04-01), Feuillade
patent: 3984762 (1976-10-01), Dowgiallo, Jr.
patent: 4259639 (1981-03-01), Renirie
patent: 4743855 (1988-05-01), Randin et al.
patent: 4952862 (1990-08-01), Biagetti et al.
Vaccaro, F. J. et al, "Internal Resistance: Harbinger of Capacity Loss in Starved Electrolyte Sealed Lead Acid Batteries," Intelec 87 Conference Proc., pp. 128-131 (1987).
AT&T Bell Laboratories
Caplan David I.
Do Diep
Strecker Gerard R.
LandOfFree
Method of measuring remaining capacity of a storage cell by comp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of measuring remaining capacity of a storage cell by comp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring remaining capacity of a storage cell by comp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2300514