Diagnosis for expected life of emergency power apparatus
First Claim
1. A battery diagnostic system to be used to monitor the aging status of each of multiple rechargeable battery cells by measuring the characteristic data of a large number of serially connected batteries, the arrangement comprising:
- a group of relay circuits (4) is connected with each cell of the batteries;
the relay contacts in the said group of relaying circuits (4) are connected with the (+) and (−
) of every battery cell through 4-terminal circuit network;
the constant current source (5) being controlled by main controller unit (MCU, 11) is connected with the said group of the relaying circuits (4);
the input/output equipments such as LCD and/or KEYPAD are connected with the MCU (11);
the total system being controlled and managed by MPU (1) in the said MCU (11), and wherein the operation comprising;
the select control signal generated by the MPU (1) activates the corresponding relay which connects the battery cell to be measured in accordance with the measuring sequence with the input port of the MCU;
the constant current source (5) being started by the clock signal (CLK) generated by the MPU (1) and the constant current (Is) generated by the constant current source (5) being supplied to the battery through the said group of relaying circuits (4), the characteristic data such as battery voltage (V), impedance voltage (Vis), AC constant current (Is), temperature (T), Gravity (G) being amplified by the automatic scaling circuit (7), and digitized by the A/D converter (6) and then stored in the memory device in the MPU (1);
the said MPU (1) stopping the said constant current source (5), the internal impedance of a battery cell being calculated by the disclosed impedance calculation program;
the battery aging status being determined by the program in the MPU (1) on the basis of the characteristic data and battery cell internal impedance;
the said characteristic data, the battery internal impedance and a battery status history data being recorded in the memory (2);
the said series of all operations and all steps, of measuring, computing and storing data being repeated and the said diagnosis data of the battery strings being transmitted to the PC or host via RS232, RS422, RS485 or CDMA if necessary.
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Accused Products
Abstract
This invention measures the exact value of impedance voltage (Vis) from AC actual waveform (VSM) which includes ripple noise voltage, and suggests the inventive circuits and softwares capable of acquiring the effective resistance of battery internal impedance and the operational algorithm of the diagnosis for the expected life of battery string. In accordance with a series of functional operations and the execution of the program in MPU, this diagnostic system can find the cause of aging progress in advance and settle by unmanned monitoring the healthiness of emergency power system always in real time at remote site.
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Citations
21 Claims
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1. A battery diagnostic system to be used to monitor the aging status of each of multiple rechargeable battery cells by measuring the characteristic data of a large number of serially connected batteries, the arrangement comprising:
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a group of relay circuits (4) is connected with each cell of the batteries;
the relay contacts in the said group of relaying circuits (4) are connected with the (+) and (−
) of every battery cell through 4-terminal circuit network;
the constant current source (5) being controlled by main controller unit (MCU, 11) is connected with the said group of the relaying circuits (4);
the input/output equipments such as LCD and/or KEYPAD are connected with the MCU (11);
the total system being controlled and managed by MPU (1) in the said MCU (11), and wherein the operation comprising;
the select control signal generated by the MPU (1) activates the corresponding relay which connects the battery cell to be measured in accordance with the measuring sequence with the input port of the MCU;
the constant current source (5) being started by the clock signal (CLK) generated by the MPU (1) and the constant current (Is) generated by the constant current source (5) being supplied to the battery through the said group of relaying circuits (4), the characteristic data such as battery voltage (V), impedance voltage (Vis), AC constant current (Is), temperature (T), Gravity (G) being amplified by the automatic scaling circuit (7), and digitized by the A/D converter (6) and then stored in the memory device in the MPU (1);
the said MPU (1) stopping the said constant current source (5), the internal impedance of a battery cell being calculated by the disclosed impedance calculation program;
the battery aging status being determined by the program in the MPU (1) on the basis of the characteristic data and battery cell internal impedance;
the said characteristic data, the battery internal impedance and a battery status history data being recorded in the memory (2);
the said series of all operations and all steps, of measuring, computing and storing data being repeated and the said diagnosis data of the battery strings being transmitted to the PC or host via RS232, RS422, RS485 or CDMA if necessary. - View Dependent Claims (3, 10, 11, 12, 13, 14, 15, 16, 17, 21)
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2. A measurement/diagnostic system to be used to evaluate the aging status of each of multiple rechargeable battery cells and to monitor the power quality of the emergency power system (18) such as UPS and telecom power supply, the arrangement comprising:
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an AC sensor circuit (15) coupled to measure the AC voltage and AC current of the emergency power supply system (18);
a DC sensor circuit (14) coupled to measure the DC voltage and DC current of the emergency power supply system (18);
the relay contacts in a group of relaying circuits (4) connected with the (+) and (−
) terminals of each battery string through 4-terminal circuit network;
the constant current source (5) coupled with the group of relaying circuits (4);
the main controller unit (11) comprising MPU (1), pre-amplifier (16) to amplify the input signals to the optimum, automatic scaling circuit (7), A/D converter (6) and the communication port such as RS232, RS485, CDMA and LAN;
the input/output devices such as LCD and/or KEYPAD connected with the main controller unit (11), and wherein the operation comprising;
the total system being controlled and managed by the MPU (1) in the said MCU (11);
the select control signal from the MPU (1) activating the selected relay and the constant current source (5) by the clock signals generated by the MPU (1), and the activated AC constant current (Is) from the said constant current source (5) being applied to the selected battery cell through the said group of relaying circuits (4);
the characteristic data such as voltage (V), impedance voltage (Vis), AC current (Is), temperature (t), gravity (G) being collected through the said group of relaying circuits (4), and the diagnosis of the aging status of the selected battery cell being processed by the program installed in the MPU (1) on the basis of the collected data;
the charging/discharging voltages (DCV) and the charging/discharging currents (DCA) of the battery strings and the AC voltage and AC current of the emergency power supply system (18) being collected and recorded at the same time;
AC voltage and current waveform being collected at the same time;
the internal battery impedance being computed by the impedance computation program and the measured and computed data being recorded;
the said series of all operations and all steps, of measuring, computing and storing data being executed repeatedly;
the stored data being transmitted to the host computer through the said communication ports (8) at the predetermined time;
when the values of the said measured data and the said computed data beyond the preset values, the failure alarm and event time being set;
and data being transmitted to the remote or host computer via the communication ports (8) along with failure time.
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4. On measuring the internal impedance to evaluate the aging status of batteries, capacitors or edematous part, the measuring method for the true RMS value of the small signals to get the impedance voltage (Vis) comprising:
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the frequency of AC constant current (Is) supplied to the objects to measure the internal impedance being set as integer times the frequency o3S of the commercial power source;
the frequency of the impedance voltage (Vis) induced by AC constant current (Is) being the same frequency of the said AC constant current (Is);
the disclosed noise rejection circuit which has narrow band characteristics centered at the same frequency of the said AC constant current (Is) being used if necessary;
the noise ripple voltage (VRP,FLT) and AC actual voltage (VSM) being acquired;
by mutual addition and subtraction of all the frequencies of all the harmonics belonging to the said AC actual voltage (VSM), producing the 1st greatest common measure (GCM) among the said resultant values of mutual addition and subtraction;
by mutual addition and subtraction of all the frequencies of all the harmonics belonging to the said noise ripple voltage (VRP,FLT), produce the 2nd GCM among the said resultant values of mutual addition and subtraction;
produce the 3rd GCM between the said 1St GCM and the said 2nd GCM;
the integration interval (TD) for the computation of the RMS values of the said AC actual voltage (VSM) and the noise ripple voltage (VRP,FLT) being set to the said 3rd GCM or its common multiple;
acquiring the RMS values by integrating the said AC actual voltage (VSM) and harmonic ripple voltage (VRP,FLT) for the said integration interval (TD). - View Dependent Claims (5, 6, 7, 8, 9)
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18. A system configuration to monitor the operations of multiple emergency power systems (18) and the aging status of battery cells, with the multiple measurement/diagnostic systems, the arrangement comprising:
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the measurement/diagnostic system (164-a, 164-b, - - - , 164-n) with identical structure being mutually connected through the internal communication ports (163);
one measurement/diagnostic system being designated as a master and the others as slaves, and the master system (164) can communicate with every slave systems (164-a, 164-b, - - - , 164-n);
the said slave measurement/diagnostic system (164-a, 164-b, - - - , 164-n) being connected with the local supervisory systems (169-a, 169-b, - - - , 169-n) through serial ports;
the main measurement/diagnostic system (164) can be configured to have a wireless communication port for wireless remote communication;
the remote network communication can be done through the local monitoring system (169) connected with main measurement/diagnostic system (164);
all the measurement/diagnostic system (164,164-a, 164-b, - - - , 164-n) have serial communication ports for the connection with any remote control apparatus or console apparatus including the local monitoring systems;
the local monitoring system (169) connected with the main measurement/diagnostic system is configured to be able to adjust parameters and to retrieve the data of the slave systems through the communication port. - View Dependent Claims (19, 20)
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Specification