Method and means for adjusting battery monitor based on rate of current drawn from the battery
First Claim
1. A metering system for measuring and indicating the state of charge of an electrical storage battery, comprising:
- (a) means for storing a numerical value indicative of the state of charge of said battery and for providing an output voltage signal representative thereof;
(b) means for detecting the terminal voltage of said battery, coupled to said means for storing, and being operable to generate a function of said battery terminal voltage which is a substantially proportional fraction of said terminal voltage and to provide an input to said means for storing if said function is below a threshold variable reference voltage signal;
(c) means for receiving said output voltage signal and for generating said variable reference voltage signal therefrom, said variable reference voltage signal being lowered as a function of said output voltage signal when said output voltage signal indicates progressively lower states of charge; and
(d) means for measuring the rate of current drawn from said battery and adjusting said means for receiving and generating, in proportion to said rate, such that said variable reference voltage signal will be greater or lesser depending on the instantaneous level of said rate.
9 Assignments
0 Petitions
Accused Products
Abstract
In a preferred embodiment, a metering system for measuring and indicating the state of charge of an electrical storage battery, including: apparatus for storing a numerical value indicative of the state of charge of the battery and for providing an output voltage signal representative thereof; apparatus for detecting the terminal voltage of the battery, coupled to the apparatus for storing, and being operable to generate a function of the battery terminal voltage which is a substantially proportional fraction of the terminal voltage and to provide an input to the apparatus for storing if the function is below a threshold variable reference voltage signal; apparatus for receiving the output voltage signal and for generating the variable reference voltage signal therefrom, the variable reference voltage signal being lowered as a function of the output voltage signal as the output voltage signal indicates progressively lower states of charge; and apparatus for measuring the level of current drawn from the battery and adjusting the apparatus for receiving and generating, in proportion to the current level, such that the variable reference voltage signal will be greater or lesser depending on the current level.
255 Citations
16 Claims
-
1. A metering system for measuring and indicating the state of charge of an electrical storage battery, comprising:
-
(a) means for storing a numerical value indicative of the state of charge of said battery and for providing an output voltage signal representative thereof; (b) means for detecting the terminal voltage of said battery, coupled to said means for storing, and being operable to generate a function of said battery terminal voltage which is a substantially proportional fraction of said terminal voltage and to provide an input to said means for storing if said function is below a threshold variable reference voltage signal; (c) means for receiving said output voltage signal and for generating said variable reference voltage signal therefrom, said variable reference voltage signal being lowered as a function of said output voltage signal when said output voltage signal indicates progressively lower states of charge; and (d) means for measuring the rate of current drawn from said battery and adjusting said means for receiving and generating, in proportion to said rate, such that said variable reference voltage signal will be greater or lesser depending on the instantaneous level of said rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of measuring and indicating the state of charge of an electrical storage battery, comprising:
-
(a) storing a numerical value indicative of the state of charge of said battery and providing an output voltage signal representative thereof; (b) detecting the terminal voltage of said battery, generating a function of said battery terminal voltage which is a substantially proportional fraction of said terminal voltage, and changing said numerical value if said function is below a threshold variable reference voltage signal; (c) receiving said output voltage signal and generating said variable reference voltage signal therefrom, said variable reference voltage signal being lowered as a function of said output voltage signal when said numerical value indicates progressively lower states of charge; and (d) measuring the rate of current drawn from said battery and adjusting said variable reference voltage signal, in proportion to said rate, such that said variable reference voltage signal will be greater or lesser depending on the instantaneous level of said rate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification