Low float technology battery
First Claim
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1. A method of controlling positive plate grid growth in a floated lead-acid electrochemical cell comprising maintaining the cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
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Abstract
In a device for providing stand-by power to an electrical apparatus, such as a telephone switching system, the battery contained therein is maintained at a positive plate polarization of about 20 to 40 millivolts per cell.
16 Citations
45 Claims
- 1. A method of controlling positive plate grid growth in a floated lead-acid electrochemical cell comprising maintaining the cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
- 11. A method of prolonging the useful life of a lead acid battery in float comprising at least one electrochemical cell comprising at least one positive plate, at least one negative plate and an electrolyte, the method comprising maintaining the at least one cell at a positive plate polarization of about twenty (20) to about forty (40) millivolts.
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21. In a system comprising electrical apparatus and a battery for providing stand-by D.C. voltage for said apparatus in the event of interruption of conventional sixty (60) hertz A.C. public utility service electrical current said system including:
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A. rectification means, receiving a conventional (public utility) sixty (60) hertz A.C. voltage for converting said A.C. to D.C. voltage suitable for use by the electrical apparatus; B. an electrical apparatus, receiving said D.C. voltage and using said D.C. voltage for functioning of said apparatus; C. a battery containing lead-acid electrochemical cells connected in series; D. connection of said battery and said apparatus in parallel across output terminals of the rectification means; E. connection of said battery and said apparatus such that on interruption of D.C. voltage from the rectification means, the string would provide D.C. voltage to the apparatus in the same direction of current flow as previously provided by said rectification means; the improvement comprising said battery containing a sufficient number of cells in series so that the cells are maintained at about twenty (20) to about forty (40) millivolts positive plate polarization per cell by the D.C. voltage from said rectification means. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. In a telephone switching system, including a battery for providing stand-by D.C. voltage for telephone switching apparatus connected to a telephone communications network in the event of interruption of conventional sixty (60) hertz A.C. public utility service electrical current apparatus, said switching system including:
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A. rectification means, receiving a conventional public utility sixty (60) hertz A.C. electrical voltage for converting said A.C. voltage to D.C. voltage of about forty-five (45) to about 53.5 volts; B. a telephone switching apparatus, receiving said D.C. voltage and using said D.C. voltage for providing telephone switching to and as required by a telephone communication network; C. a battery containing lead-acid electrochemical cells connected in series; D. connection of said battery and said apparatus in parallel across output terminals of the rectification means; E. connection of said battery and said apparatus such that, on interruption of D.C. voltage from the rectification means, the current would provide D.C. voltage to the switching apparatus in the same direction of current flow as previously provided by said rectification means; the improvement comprising said battery containing a sufficient number of cells is series so that the cells are maintained at about twenty (20) to about forty (40) millivolts positive plate polarization per cell by the D.C. voltage from the rectification means. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of controlling positive plate grid growth in a lead-acid battery comprising electrochemical cells connected in series, comprising maintaining the cells at a positive plate polarization of about twenty (20) to about forty (40) millivolts per cell.
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44. In a method of providing stand-by power for use by an electrical apparatus in the event of interruption in conventional sixty (60) hertz A.C. public utility electrical current service, including:
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A. continuously rectifying by a rectifying means said A.C. voltage to D.C. voltage suitable for use by the electrical apparatus. B. providing said D.C. voltage resulting from continuous rectification to said electrical apparatus; C. positioning a battery containing lead-acid electrochemical cells, connected in series and said electrical apparatus in parallel across output terminals of the rectifying means; D. positioning said battery and said apparatus such that, on interruption of output from said rectifying means, the battery will provide voltage suitable for use by the electrical apparatus in the same electrical current direction as previously provided by said rectifying means; the improvement comprising E. maintaining said cells at a positive plate polarization of about twenty (20) to about forty (40) millivolts per cell while public utility electrical current is being supplied. - View Dependent Claims (45)
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Specification