Battery scanning system
First Claim
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1. A battery scanning system comprising:
- (a) voltage connecting means for individually connecting across the voltage terminals of each of a plurality of battery cells, said voltage connecting means including(1) a plurality of relays, said plurality of relays being connected to said plurality of cells so that each of said plurality of cells is connected between two of said plurality of relays,(2) a plurality of load resistors, one of said load resistors connected in series with one of said plurality of relays,(3) a positive load line, said positive load line being connected to the positive terminal of each of said cells via one of said load resistors and one of said relays, and(4) a negative load line, said negative load line being connected to the negative terminal of each of said cells via one of said load resistors and one of said relays;
(b) an isolation amplifier, the input of said isolation amplifier connected to the output of said voltage connecting means;
(c) an analog to digital converter, the output of said isolation amplifier connected to the input of said analog to digital converter; and
(d) a digital logic device including a cell selector means for sequentially selecting a predetermined number of cells, a high limit means for determining when a cell has a voltage that is greater than a predetermined high limit and a low limit means for determining when a cell has a voltage that is less than a predetermines low limit;
(e) said cell selector means including(1) a ring counter means having a start input and a reset input;
(2) a comparator;
(3) cell number means for selecting the number of cells to be monitored,(4) means for loading the output of said cell number means in said comparator and for starting said ring counter;
(5) means for connecting the individual sequential output of said ring counter to activate the relays associated with each cell sequentially;
(6) means for summing the outputs of said ring counter and comparing the sum to the number of cells loaded into said comparator, said comparator providing a reset output when the sum of said ring counter outputs equals the load value; and
(7) means for applying said reset output from said comparator to the reset input of said ring counter.
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Abstract
A battery scanning system which is capable of monitoring and displaying theoltage of each cell in a battery or upon command provides the cell voltage distribution by displaying the cell number and voltage value of highest and lowest cell. The system has a digital logic system, display, input switches for operator generated variables, an alarm, relays, relay selection gates, an optically coupled isolation amplifier, power source and an analog-digital converter. The optically coupled analog amplifier electrically isolates the system from the battery so that large voltage offsets will not adversely affect the automatic measuring of the cells.
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Citations
8 Claims
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1. A battery scanning system comprising:
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(a) voltage connecting means for individually connecting across the voltage terminals of each of a plurality of battery cells, said voltage connecting means including (1) a plurality of relays, said plurality of relays being connected to said plurality of cells so that each of said plurality of cells is connected between two of said plurality of relays, (2) a plurality of load resistors, one of said load resistors connected in series with one of said plurality of relays, (3) a positive load line, said positive load line being connected to the positive terminal of each of said cells via one of said load resistors and one of said relays, and (4) a negative load line, said negative load line being connected to the negative terminal of each of said cells via one of said load resistors and one of said relays; (b) an isolation amplifier, the input of said isolation amplifier connected to the output of said voltage connecting means; (c) an analog to digital converter, the output of said isolation amplifier connected to the input of said analog to digital converter; and (d) a digital logic device including a cell selector means for sequentially selecting a predetermined number of cells, a high limit means for determining when a cell has a voltage that is greater than a predetermined high limit and a low limit means for determining when a cell has a voltage that is less than a predetermines low limit; (e) said cell selector means including (1) a ring counter means having a start input and a reset input; (2) a comparator; (3) cell number means for selecting the number of cells to be monitored, (4) means for loading the output of said cell number means in said comparator and for starting said ring counter; (5) means for connecting the individual sequential output of said ring counter to activate the relays associated with each cell sequentially; (6) means for summing the outputs of said ring counter and comparing the sum to the number of cells loaded into said comparator, said comparator providing a reset output when the sum of said ring counter outputs equals the load value; and (7) means for applying said reset output from said comparator to the reset input of said ring counter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification