KR20040092016A - Monitoring and diagnostic system for expected life of emergency power system - Google Patents

Abstract

PURPOSE: An apparatus for diagnosing deterioration of an emergency power system is provided to prevent the deterioration by monitoring the soundness of the emergency power system. CONSTITUTION: A relaying circuit(4) is connected to each cell of a storage battery(3). A constant current source(5) is controlled by a MCU(11) and is connected to the relaying circuit. A main input/output unit such as an LCD and a keypad is connected to the main control unit. An MPU(1) of main control unit outputs a selection control signal to operate an n-th relay connected to the storage battery. The MPU outputs a clock pulse signal to operate the constant current source. The constant current generated by the constant current source is applied to the storage battery through the relaying circuit. An auto scaling circuit(7) is used for amplifying characteristic data of the storage battery. The amplified data are converted by an A/D converter(6). Internal impedance of the storage battery is calculated by an impedance calculation program. State history data of storage battery cells are calculated by a program within the MPU. The characteristic data, the internal impedance, and the state history data are stored in the memory.

Description

Degradation diagnosis (quality monitoring) device of emergency power system through communication network {Monitoring and diagnostic system for expected life of emergency power system}

Since the demand of storage batteries has been diversified since the 1970s, in addition to emergency power supplies, it has been applied to fields such as large-capacity energy storage, electric vehicles, and power storage for power load leveling. In particular, with the expansion of the IT industry, various data transmission and wired / wireless communication networks have increased, and communication facilities such as repeaters have been rapidly spreading, and the number of storage batteries used as a reserve power supply device has been greatly increased.

Currently, a company that provides wired / wireless communication service has hundreds of thousands of battery equipment as the primary backup power of communication network power, and it is connected and operated in a floating charging state at all times. This equipment is indispensable to continue the uninterrupted power supply in case of AC power failure or breakdown (check), and its role is very important in maintaining the reliability of the communication network power. Usually, PS or VGS type 2V single cell used as the power of these network is connected in 24 cell or 12 cell in series, so even if only one cell in series is deteriorated, back-up function cannot be performed in case of commercial line outage. As the capacity of the batteries decreases gradually due to ageing, the capacity of the batteries varies depending on the degree of corrosion of the positive electrode lattice, the decrease of electrolyte, and the degree of sulfation of the active material of the negative electrode. Residual capacity tests are conducted to monitor the progress of deterioration.

In addition, large-capacity batteries are also used in the uninterruptible power supply (UPS) of data processing computer centers and the DCS, which are factory automation and monitoring and control facilities, which are increasing every year. In order to secure reliability, it is necessary to deteriorate the battery or diagnose the life of the battery in advance.

In other words, more than 100 cells are connected in series and are always operated in the floating charge state. The deterioration status of each cell is not connected to each other. If a part (even one) of the cells is deteriorated, it will not function properly at the time of power failure, so it is necessary to check the degree of deterioration of each unit cell of these battery facilities.

The battery deterioration diagnosis method that has been proven to date is a method of measuring the remaining capacity of a sample cell by discharging a storage battery connected to a system in full capacity by a real load discharge method, and this method is mainly used in the industry. The above method can diagnose the lifespan of the battery in operation relatively accurately, but deterioration of the storage battery proceeds remarkably by grasping the capacity of only the lowest capacity unit cell (unit cell) among the battery. It is not suitable to find all the unit cells (unit cells) that have reached the end of their lifetime.Therefore, this method alone cannot diagnose the degree of deterioration of each unit cell of the storage battery during floating charging. If there is a power failure during the test, there is a risk that the system of the communication device will stop, and many preparations such as the preparation of the test facility including the load of several tens of KW class, the adjustment of the pseudo load, and the measurement of the terminal voltage will take a long time. Have

In addition, as shown in FIG. 1, a PC equipped with a commercially available LabView program (data analysis software), a data acquisition device (DAQ), and the like for the purpose of diagnosing a battery which is recently used in a UPS and a rectifier. Measurement and diagnostic devices for measuring the temperature of each cell of the battery, the voltage of the floating charge state, the charging current, and the degree of battery abnormality by the correlation of the terminal voltage related to the temperature have been commercialized. The diagnostic method compares the terminal voltage of a unit cell in floating charging with the same battery cell connected in series to determine the degree of deterioration.However, due to the magnitude of the floating voltage or the effect between the unit cells in series and parallel connection Since there are many terminal voltage deviations, there is no absolute correlation between the two factors, the remaining capacity (degradation degree) and the terminal voltage during floating charging. Since the bar to be certified, and has a lot of problems for its reliability doegie adopted as a way to diagnose the battery life or failure.

In addition, although an instrument that has the ability to measure the internal impedance of a battery is commercially available and commercially available from the selection company, it is necessary to measure each cell of the battery system in floating charging manually by using this instrument. In the case of analyzing the measured data by database (hereinafter referred to as DB), the measurement terminals (Lead) are measured by moving them to each cell being charged, so there is a risk of an electric shock accident. There is a disadvantage in that time is duplicated. In addition, since total data required for degradation diagnosis such as ambient temperature, specific gravity, and charging current cannot be measured at the same time, it is easy to measure several sample cell impedances, but there are many difficulties in measuring accurate cell degradation at the same time and making accurate degradation diagnosis.

Therefore, the existing measurement method has a disadvantage that it is difficult to accurately determine the sound state (deterioration degree) of the emergency power system such as a plurality of batteries.

The present invention is to improve the conventional problems, to ensure the reliability of the computer uninterruptible power supply, the power supply (rectifier) of the wired / wireless communication network and the battery used therein, to diagnose the characteristics in real time during operation and to check the sound state (degradation degree) In this paper, we will present a comprehensive diagnosis system that can provide services that can be managed remotely. This diagnostic system operates more than 100 parallel and series connected battery cells under real load condition (floating or equal charging), such as battery voltage, charge / discharge current, internal temperature, internal impedance and specific gravity By measuring the data, we find the factors that correlate with the deterioration state of the battery, analyze the battery's health, remaining capacity and diagnose the remaining life of the battery.

Figure 2 shows the functional structure of the system for diagnosing the sound state (quality control) of the emergency power system proposed in the present invention. Referring to the structure and operation method of the present invention, the characteristic data of the storage battery, such as the terminal voltage (V), current (I) and temperature (t) of the ground element through the known voltage, current sensor and thermistor sensor shown in FIG. Is inputted to a central processing unit (hereinafter referred to as MPU) such as a microprocessor, and the instantaneous AC constant current (Is) is supplied to the battery, and the AC voltage generated at the terminal voltage is measured by the internal impedance of the battery. The internal impedance of the battery is calculated by the algorithm programmed in the MPU from the two measurements. When a plurality of relay circuit groups are provided for measuring 100 battery cells and the MPU generates a signal for selecting a battery to be measured, each data of the battery is connected to the input of the MPU through a corresponding relay of the selected relay circuit group. A constant current is connected and supplied to the battery via a relay to measure the internal impedance. The operation control of the series of relaying circuits and the information data inputted therein are stored in the internal memory provided in the diagnostic system, and the degradation diagnosis algorithm program in the MPU is operated by using this as the basic data to diagnose the degree of degradation of the battery.

Keypad input and LCD are used as the user interface, and when the battery malfunctions, necessary information and alarms are generated on the LCD screen of the diagnostic device, so that the battery can be managed efficiently. It also records and stores the acquired data and transmits it to an external host PC through a communication means such as serial communication, and when the host PC is located at a geographical distance from a management place such as a relay station of a wired / wireless communication network. As it is installed in an area where traffic is inconvenient, it can be configured to be transmitted by using a telecommunication network or a wireless communication network even when it is difficult to access the site. Host PC located in the field or remotely can analyze the acquired data, determine the state of the battery, process and analyze the characteristics as graphic or chart, and manage the history of it as a DB and follow-up management of such data in real time By doing so, the reliability of the power system can be improved and the cost required for the management thereof can be reduced.

In addition, the diagnostic apparatus according to the present invention has the function of automatically measuring the characteristic data during charging / discharging of the battery cell required during the battery manufacturing process such as the chemical conversion process, in addition to the above-described deterioration diagnosis purpose, and the terminal voltage of the unit cell. Since necessary data such as internal impedance and d / b can be converted within a short time, it may be used for the purpose of analyzing the state of each unit cell during charging / discharging.

1 is a conceptual diagram of a conventional battery measuring diagnostic apparatus

2 is a conceptual diagram of a microprocessor-based diagnostic apparatus system of the present invention.

3 is a configuration diagram of each unit of the degradation diagnostic system of the present invention

4 is a functional block interconnection diagram of the degradation diagnostic system of the present invention;

5 is a conceptual diagram of a wired and wireless communication system of the degradation diagnostic apparatus of the present invention.

Figure 6-1 is an embodiment of wired and wireless communication of the degradation diagnostic device system of the present invention

Figure 6-2 is another embodiment of wired and wireless communication of the diagnostic device system of the present invention

7 is a cycle of the impedance voltage and the ripple voltage of the battery cell obtained by the degradation diagnostic apparatus system of the present invention.

8 is an embodiment in which three sets of relaying circuit groups are connected to each other in parallel

9 is a functional diagram of the MCU circuit and relay circuit group

10 is a constant current circuit block diagram of the present invention.

11 is a detailed view of the class B amplifier circuit of the present invention

12 is a conceptual diagram of an automatic measurement range selection circuit of the present invention.

13-1 is a time chart of a timer interrupt program.

13-2 is a flow chart of the main program

14-1 is a block diagram of a zero crossing circuit of constant current Is and impedance voltage Vis.

14-2 shows the instantaneous waveform and phase angle time diagram of the constant current Is and the impedance voltage Vis.

As described above, the diagnostic apparatus system suggests a method for managing diagnosis of degradation of an emergency power system including a storage battery using a general communication network. The configuration and operation principle thereof will be described in detail with reference to FIGS. 3 to 4 as follows.

3 shows a basic block diagram of a diagnosis system configuration diagram for diagnosing a storage battery (usually composed of 12 cells, 24 cells, or 36 cells) of a basic unit. In FIG. 3, the MPU 1 is a central processing unit that controls and manages the entire system, and stores characteristic history data of each battery cell 3 in the memory device 2. Each cell of the battery system and the relay circuit group 4 are connected, and each relay contact is connected to the positive and negative terminals of each of the battery cells through a four-terminal network. When a select signal (Select) is applied to the input terminal of the relay circuit group 4 to excite (on) the relay coil connected to the battery to be measured from the MPU 1, the selected relay among the 1 to N relays is operated. At the same time, when the constant current source circuit 5 is started by applying a pulse signal of several tens of kilohertz to the constant current source circuit 5, a constant current is input to the capacitor through the relay, and the voltage (V), temperature (t) and impedance of the battery The data signals of the data Z and the specific gravity G are converted into values that can be input to the MPU 1 by the automatic scale circuit 7 and the signal converter 6 and input to the input terminals of the MPU 1. The MPU 1 calculates the state history data of the current state battery cell using the internally deteriorated diagnostic program as input data, and the result is stored in the memory device 2, and RS232, RS422, RS485 or CDMA It is transmitted to the outside via the same communication device (8). In this case, when using only the life cycle of several battery cells, the relay circuit does not need to be built-in and the output terminal of the 4-terminal network is directly connected to the terminal of the battery cell to be measured.

4 illustrates a hardware configuration of a diagnostic apparatus for connection diagrams of functional blocks of the diagnostic apparatus. Its configuration consists of a main controller unit 11, an auxiliary power supply 10, a constant current source 5, a relay circuit group 4, an AC sensor circuit 15, and a DC sensor shown as an MCU. Circuit 14 or the like. As described above, the main controller unit 11 amplifies each characteristic data of the storage battery and the quality information data signal of the emergency power supply unit, which are input through the MPU 1, the memory element 2 and the relay circuit 4. A communication port such as an automatic scale circuit 7 and an A / D signal converter 6 for data signal conversion, an RS232, RS422, RS485 or CDMA module is included. Such hardware is supplied with control power required for operation from the auxiliary power supply 10.

As described above, in order to ensure the reliability of the computer uninterruptible power supply device, the power supply (rectifier) of the wired / wireless communication network, and the storage battery used therein, the AC power is supplied to the communication equipment or the computer in the event of a power failure. It is necessary to constantly monitor the operating state of the emergency power supply 18, such as a UPS for supplying in an uninterrupted manner. To this end, the main controller unit 11 collects and computes data of each battery cell through the relay circuit group 4 to diagnose the battery state, and at the same time, the AC output voltage and output current of the emergency power supply unit 18 and The charge / discharge voltage (DCV) and the current (DCA) at the time of charging / discharging the battery are obtained through the known AC sensor circuit 15 and the DC sensor circuit 14 and recorded at all times. More specifically, the main controller unit 11 measures and analyzes three-phase voltage (AC voltage) and three-phase current (AC current) of the power supply system to monitor power quality of the power supply system, except for the time required to check the characteristics of the battery. It performs a series of operations of storing the effective value of each phase in normal state, the effective value and instantaneous voltage value of each phase in an accident, and transfers the stored data to the host computer at a certain time, and the internal real time clock timer ( The transmission time is determined by RTC) and the accident time is recorded. In addition, if the acquired data value is out of the set limit (Limit value) such as voltage sag and power failure, it transmits the accident information to the remote or host PC through the communication port.

The constant current source circuit 5 serves to supply a constant current of a predetermined size so that a voltage can be generated by the impedance of the battery, and the relaying circuit group 4 is an MPU installed in the main controller unit 11 among the plurality of battery cells. One battery cell is selected by a select control signal generated by (11), and the MPU 11 is a clock of a square wave type that vibrates at 16 kHz to start the constant current source circuit 5. The constant current source circuit 5 receives the 16Khz clock and divides it to generate an AC constant current in the form of a 1 kHz sine wave, and the constant current is supplied to the selected battery cell through a relay of the relay circuit group 4.

As described above, since the internal impedance voltage of the battery cell is a very low voltage of 1mv or less, the measurement value of the signal voltage is affected by the drop in the wiring voltage of the measurement circuit and the ripple current during charging. Therefore, AC 4-terminal measurement is used to reduce the contact resistance of the terminals (lead wire resistance and plug contact resistance). That is, the terminal of the constant current circuit inputs an alternating current Is to the battery cell, and connects the voltage drop of the internal impedance of the battery with the high impedance circuit in the preamplifier circuit 16 shown in FIG. The current does not flow by the terminal contact resistance so that no voltage drop occurs. As such a measuring method, the voltage drop between the lead wire resistance and the contact resistance is made small so that it is hardly affected by the contact resistance.

On the other hand, the impedance voltage (hereinafter referred to as AC voltage) of the battery cell obtained through the relay circuit group 4 is a fine signal of several mv, which is very small compared to the cell terminal voltage (VDC) (thousands of Since it corresponds to 1) and a lot of electromagnetic noise is mixed from the surroundings, it is necessary to design the preamplifier 16 optimally and amplify and extract only the AC voltage Vis. In addition, since the ripple current flows into the battery during floating charging, the terminal voltage waveform of the battery contains a large amount of ripple voltage. The ripple voltage depends on the rectification method of the charging device, but includes harmonic ripples of various orders, most of which can be filtered out by a band pass filter designed in the preamplifier circuit 16, but the impedance voltage required for the measurement. Ripple voltage noise of 900 ~ 1140hz, similar in frequency band (V1s), is not filtered (rejected) and passes through the impedance voltage (Vis) signal, which seriously affects the impedance measurement value.

As described above, the content of harmonic components among the ripple voltage frequencies is different depending on the rectification method (constant) of the charger. However, in the three-phase rectification method, the power supply has a radix frequency of 60 Hz, which is 900 Hz (15 harmonics). 1020 hz (17 harmonics) and 1140 hz (19 harmonics) will have a significant impact on most measurements. That is, several times the harmonic ripple voltage is mixed with the impedance alternating voltage (V1s), and the measurement signal voltage waveform entering the input terminal of the MPU 11 vibrates at a constant cycle as shown in FIG. 7 and includes a plurality of harmonic ripple voltages. Also has another constant period (Trp).

FIG. 7 shows a method for obtaining the true value of the impedance voltage V1s induced by the AC current Is supplied from the constant current source 5 from the voltage signal including the ripple noise voltage. First, in the first section T1, without measuring the constant current Is, the ripple voltage instantaneous value (Vrp) generated by the charging ripple of the battery cell during floating charging is measured, read and stored, and the stored voltage instantaneous value (Vrp). The difference between this value is read by reading the internal high speed timer / counter value tmin1 and the counter value tmin2 reaching the next lowest point at the moment when) reaches the lowest point. This value is a counter value trp corresponding to the period Trp of the ripple voltage signal Vrp, and the time required for measurement thereof is at least one cycle longer than the above-described oscillation period of the harmonic ripple voltage and is several m seconds. It is enough.

The stored voltage instantaneous value Vrp is stored in a memory (shift register) inside the 1-cycle MPU 11 and is always updated with the latest data. After ΔT time, the constant current source Is is started to supply the constant current Is, and after the internal counter value reaches the lowest point tmin1 in the second section T2, it reaches the value trp corresponding to the Nth cycle. The interrupt program is executed at the moment of increase, and the interrupt program is executed and the AC voltage instantaneous voltage (Vrp + V1s) including the ripple voltage output (Vrp) already stored in the memory and the ripple coming through the D / A converter is read. By calculating the difference between the instantaneous values ((Vrp + V1s)-Vrp), the impedance voltage (V1s) which is not affected by the ripple voltage can be obtained from this value. In the above, a method of calculating the period trp by measuring the lowest point is presented, but it may be calculated using the waveform highest point, and the above steps are all performed in the impedance calculation process.

In addition, since the magnitude of the AC constant current supplied by the constant current source circuit 5 of FIG. 4 is constant for measuring the internal impedance of the battery, the AC voltage due to the internal impedance of the battery measured at the terminal voltage according to the degree of deterioration or capacity of the battery. The magnitude of the signal becomes very variable. That is, when amplifying the AC voltage signal with one amplification gain magnification, when the magnitude of the measured voltage is small, the size of the data output to the input terminal of the main controller unit 11 is also very small and the precision is lowered. If the measured voltage is large, it may cause burnout and operation abnormality out of the input voltage range of the main controller unit 11. To solve this problem, as shown in FIG. 12, amplifiers 50-1, 50-5, 5-10, and 50-50 having different amplification gain ratios are connected in parallel and their outputs are analog switches (Analog). The amplification gain magnification is inputted to the input of a signal selector such as a switch so as to be selected according to the magnitude of the AC voltage signal Vis.

12 illustrates an example in which an amplifier 50 having four amplification gain magnifications of x1, x5, x10, and x50 is provided. The method of selecting the amplifiers 50-1, 50-5, 50-10, 50-50 having the appropriate amplification gain ratio according to the magnitude of the measured AC voltage signal Vis is as follows. For smooth operation of the amplifier, an input signal within an appropriate range must be supplied. If the magnitude of the output signal amplified by the amplifier is greater than the magnitude of the operating voltage, the input signal cannot be amplified in proportion to the amplification gain ratio of the amplifier. It is well known that amplifier saturation, which is limited to voltage, occurs. Therefore, in order to select an amplifier with the proper gain gain ratio, first select the amplifier with the largest gain gain ratio, and when the amplifier output signal is saturated by the input voltage value, select the amplifier with the next small gain gain ratio in order. The input voltage range of the main controller unit 11 of the can be taken. On the contrary, if the input data is very small, it is changed to an amplifier having the next large amplification gain magnification. Therefore, when calculating impedance, an amplifier with appropriate magnification is selected, and the method of operating with this series of ideological concepts is specified by auto scaling.

FIG. 8 is an embodiment in which three sets of relay circuit groups are connected in parallel with each other, and FIG. 9 shows a functional diagram of a main controller unit and a relay circuit group. As shown in FIG. 8, the relay circuit group includes 16 relay combinations, and each group includes constant current supply (Xna), voltage sensing (Xnb), temperature sensing (Xnc), and specific gravity sensing (Xnd). ) Each has a relay. In order to select a specific cell among a plurality of cells, a select control signal is received from the MPU 11 to operate a relay of a corresponding group. The select control signal is composed of 6 bits and decoded to decode the specific relay. Configure so that you can easily select.

An operation of a select control signal used to select a specific cell among a plurality of cells will be described in detail with reference to the embodiment shown in FIG. 9. In general, the battery system of an industry consists of 12 cells, 24 cells, and 36 cells, and in consideration of convenience and economics of circuit mounting, the embodiment selects a maximum of 48 relays using a 6-bit selection control signal. First of all, a 2-bit signal among the 6-bit selection control signals generated by the MPU 11 is input to the input circuit terminals G1 and G2 of the 4-bit decoder circuit (MUX), and the master of the three relay circuit combinations consisting of 16 relays, respectively. The combination 4-1, the first slave circuit combination 4-2, and the second slave circuit combination 4-3 are alternatively selected, and the remaining 4 bits of the 6-bit selection control signal are input to the decoder circuit MUX. To terminals D0, D1, D2, and D3. The decoder circuit MUX is a circuit capable of outputting 2N selection signals through N input signals, and may be realized as one integrated circuit IC. In the present embodiment, since four input signals D0 to D3 are used, 16 output signals are generated, and the output signal selected by the decoder circuit MUX converts a transistor amplifier (TR Array) of 16 relays in the relay combination that is already selected. One relay is selected and operated. As such, the main controller unit 11 may select only one cell of a plurality of cells by operating only one (group) of 48 relays as a 6-bit selection control signal. In addition, in order to prevent one or more sets of relays from being operated simultaneously due to noise that may occur during relay operation, a resistor is connected to the input / output terminals of the decoder circuit MUX to minimize noise effects and the relay driving power supply (+ 12V) Can be turned on and off by the command of the MPU 11 to prevent relay burnout. Since the master combination 4-1 and the slave combinations 4-2 and 4-3 have the same circuit structure, the master combination 4-1 and the slave combination 4-2 and 4-3 can be easily and economically installed in a narrow space by stacking them in three stages.

The sinusoidal AC constant current supplied by the constant current source circuit 5 shown in FIG. 4 receives a 16KHz clock generated by the MPU in the main controller unit 11 shown in FIG. The supply box has been described above. The frequency of the sinusoidal constant current is set to 1 kHz in detail as follows. In general, the equivalent circuit for the AC current of the battery cell has been proved to be equivalent to the series circuit of the resistance, inductance, and capacitance (R-L-C) components, and deterioration proceeds according to the use of floating charge among the impedance components. It is also already known to measure only the resistance (R) component that is considered to be most correlated to the factor of lattice corrosion or reduction of electrolyte of the positive electrode plate. The AC voltage waveform generated between the terminals of the battery when an AC measurement current flows through the sealed lead-acid battery is characterized by the fact that the higher the frequency, the phase of the voltage according to the L component is faster than the phase of the current, and the phase of the current by the C component There is a tendency to be delayed than the phase of this voltage. Thus, the resonance point can be nearly in phase By generating a sinusoidal constant current in the frequency range of (60-1000Hz) and supplying it to the battery cell, the AC voltage by only the internal resistance component excluding inductance and capacitance components can be measured. In addition, the interfacial resistance of a battery is also an ion resistance that depends on the frequency of the sinusoidal AC constant current applied during measurement. If the measurement frequency is 1Khz, the interface resistance is very small compared to the impedance due to the capacitance component, so that it can be ignored and can be equivalent to the series circuit of the solution resistance and the electric double layer capacitor. Therefore, when a 1 kHz sine wave AC constant current flows through the battery cell, a sinusoidal voltage waveform is induced between the anodes, and the sine wave constant current waveform (Is), the sine wave voltage waveform (Vis), and the voltage component generated only by internal resistance when the phase difference between the two waveforms are measured. Bay can be calculated, which allows accurate calculation of battery internal resistance.

In addition, the size of the sine wave AC constant current supplied by the constant current source circuit 5 shown in FIG. When a large current is applied, the internal impedance voltage Vis is induced to accurately extract the voltage signal waveform from the noise. In one embodiment of the present invention, a constant current of 1 to 2 A peak may be used to obtain a voltage signal of 0.5 mv to 1.0 mv between a battery anode having an internal impedance resistance of 0.5 m ohms.

A block diagram for each function of the constant current source circuit 5 for the operation as described above is shown in FIG. A sine wave capable of receiving a known amplitude control by receiving a clock (for example, 16 KHz) synchronized with the MPU basic clock from the MPU 11 in the main controller unit through the photocoupler 30 and dividing the basic operation clock of the MPU. The generator circuit 33 obtains a complete AC sine wave with a reference frequency (eg 1 Khz).

The sinusoidal reference clock divides the MPU 11's basic operation clock from the MPU 11 as described above, and thus the sine wave AC constant current in the calculation of characteristic data related to the internal impedance since the basic operation clock of the MPU 11 is synchronized with the sinusoidal frequency. Is) and it is possible to accurately measure the phase difference of the AC voltage (Vis) generated by the internal impedance of the battery cell and to easily secure a means for reducing the error caused by the constant current source frequency variation.

In order to supply the constant current output, the output current feedback signal which is the feedback value (If) of the output current is insulated through the current transformer 41 such as CT, and then converted into the DC feedback signal in the rectification smoothing circuit 42 composed of the operational amplifier and the differential function. After calculating the difference (-) between the current set value (43) and the output current feedback value in the operational amplifier 31 to perform the amplitude control terminal of the sinusoidal wave generator circuit (33) through the integral (buffer) circuit (32) 10) to enable constant current supply. In addition, in order to increase the resolution of the measured value without affecting the battery's characteristics and lifespan during measurement, the overshoot may be applied to supply the battery with the maximum current within the limit that does not affect the battery. There is a need to generate a stable current. To this end, when the sine wave reference clock signal CLK generated at the start of the constant current source in the MPU 11 is integrated into an integrated circuit composed of a resistor R, a capacitor C, and a buffer circuit, it is started by an RC time constant. Generate a soft-start signal (SS) that rises slowly from the beginning. When the soft-start signal is connected to the output terminal of the operational amplifier 31 which performs the differential function through a diode, the differential signal is generated during the initial process of generating the sinusoidal reference clock signal CLK to start the constant current source circuit. Even if the output of the operational amplifier 31 which performs a function is generated, the soft-start signal SS becomes smaller than the output of the operational amplifier 31, so that the soft-start signal SS preferentially adjusts the amplitude of the sinusoidal wave generation circuit. It is possible to normalize the sinusoidal current waveform within a short time, such as within 10m seconds, without being input over the terminal. In addition, an AC sine wave (signal), which is an output signal of the operational amplifier 31 that performs the differential function obtained by the above method, is input to the class B amplifier circuit 35 in combination with a part of the output current to improve the transient response. Is amplified.

11 is a detailed view of the class B current amplifier circuit of the constant current source signal Is. The signal Is is a sine wave and a cosine wave whose phase is inverted by 180 degrees in the high frequency signal transformer T2 having the secondary side separated into two and having the reverse wiring. Par) signal. The two signals are output transformers connected through the operational amplifiers U9A and B, the center tap of the primary winding is connected to the positive pole of the power supply, and the start and end points of the winding are connected to the collectors of the NPN transistors Q3 and Q4, respectively. Amplified by being applied to the base terminal of the class B amplifier circuit composed of (TM1). The amplified sine wave output is a current source to be used for impedance measurement of the battery, is insulated by the output transformer TM1 having the center tap, and is connected to the relay circuit group shown in FIG. 9 through a coupling capacitor Cdc. 1,4-2, 4-3) is supplied immediately. Through the above operation, a current for measuring the internal impedance of the battery cell is generated, which is controlled to allow a certain amount of current to flow even when the internal impedance of the battery is very small and similar to a shorted load. In the coupling capacitor Cdc, the battery terminal voltage VDC and the constant current source are not electrically interrupted.

The basic data for the battery cells of the emergency power system and the measured data for monitoring the power quality of the power system connected to the emergency power system measured by the series of ideological concepts described above are measured by the main controller unit 11 shown in FIG. It is stored in internal memory by MPU and diagnoses the deterioration degree of battery, calculates the effective value of each phase for power system of emergency power system, the effective value and instantaneous voltage value of each phase in case of accident, and saves the data to outside through communication port. Transmit and determine the transmission time by recording the internal real time clock timer (RTC), record the accident time and send the accident information to the remote or host PC through the communication port. In addition, the characteristic data of the battery such as the measured battery temperature, battery cell voltage, charge / discharge voltage, current, etc., and the intrinsic internal resistance of the battery calculated on the basis of the battery, the external power such as an LCD provided in the emergency power (quality) monitoring diagnosis system. Displayed through an output device, various data or commands are inputted by an external input device such as a keypad, and a program of a deterioration reference algorithm preset by the calculated internal resistance of the battery is operated to determine a state of a cell and to prevent aging. The information of the cell which has been advanced is informed to the remote manager and the situation room through the visual (warning light), hearing (beep sound) and communication media. This series of operations of the MPU is performed by a programmed software algorithm and described in detail as follows.

The software algorithm is composed of a main program and a timer interrupt program. The main program is a low-priority program that implements functions that do not require strict program execution time constraints such as external input device processing, external output device processing, communication, and battery cell impedance calculation. Control of the constant current source circuit 5 shown, operation of the relay circuit group 4, acquiring power system measurement data of the emergency power system measured by the AC sensor circuit 15 and the DC sensor circuit 14, emergency power A function that requires a series of operations to be completed within a predetermined time such as battery temperature, battery cell voltage, charge / discharge voltage and current for acquiring and monitoring the battery cell of the system, and ac data obtained from the battery internal impedance.

13-1 conceptually illustrates how the main program and the timer interrupt program are performed. The main program is executed 120, the timer interrupt program is periodically performed 121 at regular time intervals, and the execution of the interrupt program is performed. After completion, it can be seen that the main program returns to execution 123 continuously.

In order to measure the internal impedance of a reliable battery cell, the constant current source circuit 5 shown in FIG. 4 generates a sinusoidal constant current oscillating at a high frequency of several Khz, which has already generated an impedance voltage of the same frequency as that frequency. As explained. In order to perform the function of acquiring the impedance voltage waveform in order to acquire the impedance voltage of the high frequency without loss in the timer interrupt program, the loss is not lost in the main program as shown in FIG. 13-1. In the execution of the sequence timer interrupt program that performs the function of acquiring the impedance voltage waveform to acquire, as shown in FIG. 13-1, the execution continues without returning from the return to the main program (124). In detail, the timer interrupt program for obtaining the input AC waveform, DC waveform, temperature, etc. of the power system of the emergency power system returns to the main program after acquiring this information, and the main program is executed until immediately before the corresponding interrupt is generated. Run continuously after the program. The execution of the timer interrupt program for acquiring the impedance voltage waveform is performed by obtaining the impedance voltage waveform at high speed by continuously executing the timer interrupt program without returning to the main program in acquiring the impedance voltage waveform having the high frequency. In addition, the data for monitoring the power system of the emergency power system is also periodically acquired to ensure the continuity of the data and to prevent loss.

13-2 shows a flowchart for explaining the operation procedure of the main program. In the MPU in the main control unit 11 shown in FIG. 4, when the power is turned on, the MPU receives power from the auxiliary power supply 10, performs a main program, and firstly performs a program initialization 131 process. (18) and after preparing the battery cell (3) for inspection. In operation 132, an external input device such as a keypad is input. If an external input occurs, it is determined whether the input data is a parameter of the diagnostic system (133). If it is determined that the parameter is set, the parameter is not set (134). It checks whether it is a command (135) and if it is determined to be a command, sets the data transmission variable (136). Thereafter, it is checked whether the data transmission variable is set (137), and if it is set, the data is transmitted (138) and the data transmission variable is checked (139). do. If the data size is large, the data is divided into a certain amount of data instead of all data at once, and the data is returned to the main loop so that other programs can perform it. After the return, the system checks whether there is a request for data transmission from the external system (141). If there is a request, the data transmission variable is set (142) to transmit data the next time the main program is executed. Finally, the internal impedance calculation variable is set based on the measurement data of the battery cell acquired by the timer interrupt (143). If the internal impedance calculation variable is set, the impedance calculation program 144 calculates this and calculates the internal impedance. After storing the impedance 145, the internal impedance calculation variable is released (146). The series of processes is performed repeatedly.

The impedance calculation routine 144 of the battery cell of FIG. 13-2 is performed based on the instantaneous values of the internal impedance voltage Vis and the AC constant current Is obtained and stored in the timer interrupt program, and more specifically, the period and average value calculation. It consists of a program step, an effective value, a phase difference, and an impedance calculation step. The calculation principle and operation process of the period and average value calculation program will be described with reference to FIGS. 14-1 and 14-2 in which instantaneous waveforms of AC voltage Vis and AC constant current Is are shown.

As shown in FIG. 14-1, an AC voltage Vis and an AC current Is are input to the A / D converter 171, and the phase difference φ of the voltage and current increases at a constant frequency. It is obtained using. To find the effective value, first, the average value of voltage and current should be obtained. The voltage signal is passed through the Zero Crossing Detector circuit 170 to increase the voltage using a timer. , After passing through the Zero Crossing Detector circuit 170 of the current signal, the rising edge of the current using a timer , The period of the voltage as the difference of the voltage rising edge And cycle of current Determine.

14-2, the AC voltage Vis and the current signal Is shown in FIG. 14-1 are respectively input to the A / D converter 171 to measure the size. . In addition, the voltage Vis and the current signal Is pass through a zero crossing detector circuit 170 so that the rising edge of each zero at the time when each signal changes from negative to positive ( Rising Edge), Z _CV1 , Z _CV2 , Z _CI1 , and Z _CI2 are generated. That the AC voltage and the increase of the electric current (I _s) is connected to the high-speed timer / counter in the fast MPU (11) that increases at a constant frequency. For example, if the counter operates at 1 MHz, one unit of the counter is 1 u second. If you read the counter value when rising edge occurs, , , , Can be seen.

Counter value of rising edge of voltage = 1000, = 2000 and the counter value of rising edge of current is = 1100, If = 2100, one period of voltage is 2000-1000 = 1000 (u seconds) and becomes 1Khz. One period of current is equal to 2100-1100 = 1000. Since 1000 is one cycle, it is 360 degrees and the phase difference between voltage and current is 1100-1000 = 100. Therefore, if 100 is converted to an angle, 100 x 360/1000 = 36 degrees is the phase difference. To get higher precision, you need to increase the frequency of the counter.

After determining each time period through this calculation process, the instantaneous values of voltage (Vis) and current (Is) are summed and averaged over one period to average the value of voltage (Vis) and current (Is). , Can be calculated.

The calculation of the effective value, phase difference, and impedance calculation program is the average value of the AC voltage during one cycle calculated above. And current The average value of, the instantaneous value of the stored AC voltage and the instantaneous value of the AC current can be obtained by calculating through the following equation.

here, Is the instantaneous value of the stored AC voltage waveform Is the instantaneous value of the stored AC current waveform and N is the instantaneous value stored for the entire period. In the phase difference program, the phase difference between the voltage and the current is the difference between the rising point of the voltage and the rising point of the current obtained by the above average calculation program. Is It can be obtained from the relationship of. Impedance calculation is the AC voltage effective value obtained by the above calculation process. And AC current effective value And phase difference It can be obtained by calculating the magnitude of impedance, resistance and reactance component by using the following formula.

As described above, the timer interrupt program is executed at regular intervals and returns to the main program when the execution is completed. Whenever the timer interrupt program is executed, the program to measure the waveform storage program and the impedance waveform is executed, calculate the number of times the timer interrupt program is executed, set the counter variable to increase the time for the time measurement, and determine when the counter variable reaches the determined value. Perform a binary program step or reset the counter variable to zero.

The emergency power system presented in the present invention by the above-described series of conceptual concepts and operating principles measures data measured for power quality monitoring of a power system connected to the emergency power system and basic data for battery cells used in the emergency power system. The internal impedance is calculated by the internal impedance calculation algorithm of the battery cell in the MPU, and the data is stored in the memory and used as the basic data, and the data is displayed through an external output device such as an LCD provided in the monitoring / diagnosis system. Various data or commands are inputted by an external input device, and a program of a deterioration reference algorithm preset by the calculated size of the internal resistance of the battery is operated to determine the state of the cell, and the time of the information of the aged cell ( Warning lights) and hearing (beep) and communication media By stating that the abnormality in the control room manager and the remote will be possible.

On the other hand, the battery system in the emergency power supply which is constantly monitored by the emergency power (quality) monitoring / diagnosis system proposed in the present invention is based on 12 cells, 24 cells or 36 cells depending on the capacity of the emergency power supply, As the power system capacity increases, the number of storage batteries (serial batteries connected in series) increases, which may consist of more than 100 or several emergency power systems installed in one place.

FIG. 5 illustrates a plurality of measurement diagnosis systems for monitoring a power system of a plurality of emergency power systems and diagnosing the health status (degradation degree) of a plurality of battery cells in real time by installing several emergency power systems in one place. And a block diagram showing a case where a remote network communication network is used to remotely transmit diagnosis or measurement data obtained from these multiple measurement diagnostic systems. N emergency power supply units 160, including battery cells and power supply systems, which are subject to failure diagnosis or data update, are connected to N measurement diagnosis systems 161 and 164 for diagnosing them. These N measurement diagnostic systems 161 and 164 are used to diagnose or measure the emergency power supply 160 by a series of concepts and methods described above, and to share the measured data with a plurality of measurement diagnostic systems 161. Serial interface devices 162 are respectively provided in communication ports provided in the control unit, and these serial interface devices 162 are connected to a local network 163 provided for the purpose of connecting N measurement diagnostic systems in parallel. This local network 163 is also included in the case of wireless. In addition, one measurement diagnostic system of the N measurement diagnostic system is selected as the main measurement diagnostic system 164 through which it is possible to transmit the data of the main measurement diagnostic system 164 and the remaining measurement diagnostic system. In addition, not only the serial interface device 162 but also the Lan interface device 165 may be installed in the main measurement diagnosis system 164 to transmit data acquired from N measurement diagnosis systems from a remote location. The Lan Interface device 165 is connected to the local area network 166. By such a configuration, the main measurement diagnosis system 164 in which the serial interface 162 and the Lan interface device 165 or the wireless interface device 167 are installed together is configured to transmit remote diagnosis or measurement data to a remote network communication network 166 such as the Internet. In the transmission through the wireless communication network 168 such as CDMA and CDMA, it serves as a gateway to transmit data of all measurement diagnosis systems by the remote network communication network 166 or the wireless communication network 168 such as CDMA.

More specifically, in FIG. 6-1, one of the plurality of measurement diagnosis systems is designated as the main measurement diagnosis system 164, and the others are designated as slave measurement diagnosis systems 164-a, -b, -c ....- n. Will be. In addition, the main measurement diagnosis system 164 includes a serial interface device such as RS-485, RS-422, and RS-232 or a serial interface device capable of communication within a zone such as Bluetooth, and performs control of communication. It communicates bidirectionally with and controls each of the connected slave measurement diagnostic systems. In addition, the main measurement diagnosis system 164 and the slave measurement diagnosis systems can change parameters and inquire data stored in the measurement diagnosis system through the connected local network 163, and are connected to the main measurement diagnosis system 164. In the local monitoring system 169 such as a PC, it is possible to control (parameter value adjustment, data inquiry) of all slave measurement diagnosis systems connected to the local network through the main measurement diagnosis system 164 and the serial interface device, and also in the slave measurement diagnosis system. It is possible to search the data of each diagnosis system and adjust the parameter value. In addition, the main measurement diagnosis system 164 may be connected to any wireless communication network or a long-distance network communication network in addition to the local monitoring system 169 or directly. In this case, all the slave measurement diagnosis systems may be connected to the main measurement diagnosis system 164. Access to data is also possible.

In addition, as shown in FIG. 6-2, any emergency power supply unit 170, which can be mutually matched with the communication protocols, may be used instead of the slave measurement diagnosis system, and connected instead of the slave measurement diagnosis system of FIG. 6-1. When the communication port of the emergency power supply device 170 and the communication port of the main measurement diagnosis system 164 are interconnected, access to the above-described data is enabled through the main measurement diagnosis system 164.

As mentioned above, a number of measurement diagnostic systems connected to various networks are monitored by monitoring the power system of the emergency power system to all measurement diagnostic systems using a communication port or a network such as the Internet or CDMA at the remote side. The degradation diagnosis system of the emergency power system using the communication network which can acquire and calculate the data of the battery cell, issue various commands necessary for its degradation diagnosis, and transmit the data of all measurement diagnosis systems to the remote side becomes possible. In addition to the emergency power supply, various control systems controlled by PLC can be controlled and monitored remotely using some of the functions of this diagnosis device, and various communication methods can be established and a host connected to one measurement diagnosis system when using the Internet network. Establish one fixed IP in the network and communicate with each other through N emergency power (quality) monitoring system and telecommunication network, and monitor the operation status of the N emergency power devices remotely from the host and remotely control over 1000 sites online. This enables economical maintenance in real time.

As each series of these functional operations and the program embedded in the MPU is executed, the diagnostic system system unattended monitoring and control of the health of the emergency power supply system including the battery system in real time to find out the cause of the deterioration in advance. In addition, it is possible to configure the analysis software and user menu for the computer, so that even when the power is cut off, stable secondary reserve power supply can be secured to the advanced equipment, thereby ensuring the reliability of the system and economical maintenance. The emergency power system can be rationally managed.

In addition, this system is an Internet data center, a computer center, a mobile communication base station, a telecommunications company for telecommunications networks, a hospital, a military telecommunications facility, a bank, an industrial surveillance control system, and a road that absolutely require high-quality power supply 24 hours a day. This system is required for transportation, railway and subway supervisory control system, ship, power company's power plant / substation, etc. This system has the characteristics of computerized automation for unmanned, maintenance automation, scientific maintenance, and unpredictable secondary power system. Economical maintenance and scientific operation are possible because it can prevent the inoperability caused by failure, so that the power quality of the emergency power system that includes various functions can be monitored all the time, It can detect the problem and cope to replace the failed cell in advance. Possible way to build and enable remote monitoring and control over the use of one or more 1000Site static IP, online when using the internet, because it enables you to perform a cost-effective maintenance in real time.

Claims (13)

In a system for diagnosing the state of health (deterioration) of a battery by a central processing unit (hereinafter referred to as MPU) capable of numerical operation such as a microprocessor by measuring the characteristic data of a plurality of batteries provided in a plurality of emergency power supply device, A relay circuit group 4 is connected to each cell of the battery system 3, and a relay contact of the relay circuit group 4 is connected to each of the positive and negative electrodes of the battery cell through a four-terminal network, respectively. A constant current source circuit 5 controlled by a controller unit (MCU) is connected to the relay circuit group 4, an input / output device such as an LCD or a keypad is connected to the main controller unit (MCU), and the main controller unit. It is configured to control and control the entire system by the MPU (1) in the inside, the n-th relay connected to the battery to be measured by the selection control signal (select) applied by the MPU (1) is operated and the MPU (1) The constant current source circuit 5 is started by the clock pulse signal generated by several kilohertz, and the constant current Is generated by the constant current source circuit 5 is input to the capacitor through the relay circuit group 4. , Measured terminal voltage (V), alternating current (Is), on Characteristic data such as degrees (t) and specific gravity (G) are amplified by the automatic scale circuit (7), inputted by the MPU (1) through the A / D converter (6), stored in the MPU (1), and the period And an internal impedance of the battery by means of an impedance calculation program comprising an average value calculation program step and an effective value, phase difference, and impedance calculation step, and based on the characteristic data and the internal impedance data of the battery. By calculating the state history data of the battery cell, the characteristic data and the internal impedance and the state history data of the battery cell are stored in the memory 2, if necessary communication (port) such as RS232, RS422, RS485 or CDMA Emergency power (quality monitoring) degradation diagnostic system, characterized in that it is operated to enable transmission to a PC or server or host through the device (8). Monitoring the operating status of a plurality of emergency power systems 18 using a plurality of batteries as power equipment, such as an uninterruptible power supply or a rectifier used as an emergency power source for a communication network, and at the same time diagnosing the health condition (deterioration) of the plurality of battery systems. In a system that In order to measure voltage and current in the AC power system of the emergency power system 18, a well-known AC sensor circuit 15 is installed. In the DC power system of the emergency power system 18, a known DC sensor circuit 14 is provided. The relay contact of the relay circuit group 4 is connected to the positive and negative poles of the battery system 3 via a four-terminal network, and the constant current source circuit 5 is connected to the relay circuit group 4. The main controller unit 11 is connected to a central processing unit (hereinafter referred to as MPU) capable of numerical operation, such as a microprocessor, and a preamplifier 17 or an automatic scale for amplifying and measuring an input signal (data) at an optimum magnification. It has a circuit (7) and an A / D converter (6) for signal conversion and a communication port (8) such as RS-232, RS-485, CDMA, LAN, etc., and an auxiliary power for supplying operating power of the diagnostic system. install the supply (10), and input / output devices such as LCD and keypad Connected to the unit 11, and configured to control and control the entire system by the MPU in the main controller unit 11 so that the relaying circuit group 4 can be controlled by a selection control signal of the MPU in the main controller unit 11; ) Is operated so that a specific relay is operated, and the constant current source circuit 5 is activated by a clock pulse signal of several Khz applied by the MPU, and corresponding to the storage system 3 through the relay circuit group 4. Collect and calculate data from the cell, calculate the data by a program built in the MPU to diagnose the battery state, and at the same time charge / discharge voltage (DCV) and current during charge / discharge of the battery system 3 Read the (DCA) through the known DC sensor circuit 14 and record it at the same time, and at the same time to monitor the power quality of the emergency power system 18, such as three-phase AC voltage (AC voltage) and AC current (AC) Current) AC sensor circuit Measured through (15), the MPU (1) is internally built into the period and the average value calculation program step and the impedance calculation program consisting of the effective value, phase difference, impedance calculation step to calculate the impedance, the measurement data and the calculation Data stored in the network, transmitted to the host computer through the communication port provided at a certain time, and if the measured data and the data value by the calculation exceeds the set range (remote) through the communication port Or transmit data to the host computer, determine the transmission time, record the accident (abnormal) time, and diagnose the deterioration state of the battery system through the series of operations and at the same time the power quality of the emergency power system 18 Emergency power (quality monitoring) degradation diagnostic system characterized by performing the function (Power Quality Monitoring). The method according to claim 1 or 2, Software embedded in a central processing unit (hereinafter referred to as MPU) capable of numerical operation such as a microprocessor provided in the main controller unit 11 is composed of a main program and a timer interrupt program, and a timer interrupt program is performed at a predetermined time period. The acquisition of the measurement data by the condition is performed in the timer interrupt program, the operation of the relaying circuit group 4 is performed in the timer interrupt program by the condition, and the start operation of the constant current source circuit 5 is performed by the condition. In the interrupt program, the condition of acquiring the battery internal impedance voltage waveform by the condition is performed in the timer interrupt program, and the condition of the battery impedance calculation algorithm is performed in the timer interrupt program by the condition, by the condition of DC voltage, current and AC system power supply. Acquisition of waveform The measured data and the impedance data calculated through the acquired impedance data and the impedance calculation algorithm performed by the condition are stored in the memory, and after the timer interrupt program is performed, the program returns to the main program. The timer interrupt program is continuously executed for a predetermined period of time without returning to the main program during the acquisition of the internal impedance voltage waveform by the battery, and at a predetermined interval even during the acquisition of the internal impedance voltage waveform of the battery under the above conditions. Acquisition of each measurement data is performed, so that the waveform information on the quality of the emergency system power supply is operated so as to acquire without loss, emergency power (quality monitoring) degradation diagnostic system. The method according to claim 1 or 2, The automatic scale circuit 7 provided in the main controller unit 11 is connected in common to the inputs of several amplifiers 50 whose measurement signals have different amplification gains. It is configured to be input to the input of the signal selector 51, such as an analog switch, respectively, so that the amplifier 50-50 having the largest amplification gain among the amplifiers 50 is selected, and when the output is saturated, step by step Select an amplifier with a small amplification gain, repeat the above steps, and if the output of the amplifier selected in that step is smaller than the set range, select an amplifier with a large amplification gain in the next step. By repeating, the measurement signal is not saturated and the maximum data resolution is obtained, and the amplification gain value of the selected amplifier is reflected and calculated in the impedance calculation to obtain high measurement accuracy. Emergency power (quality monitoring) degradation diagnostic system, characterized in that the density is implemented. The method according to claim 1 or 2, The selection control signal (select) generated in the MPU provided in the main controller unit 11 to select a relay connected to the storage battery of the relaying circuit group 4 is composed of a 6-bit binary code signal, One relay circuit group among the three relay circuit groups 4-1, 4-2, and 4-3 is selected by the 2-bit signal among the 6 bits, and the remaining 4 bits are input to the decoder circuit MUX. One of the 16 relays applied to the terminals D0-D3 and connected to the output terminals A0-A15 of the decoder circuit MUX is selected so that the three relay circuit groups 4 having a maximum of 16 relays One of the 48 relays is selected, and the relaying circuit group 4 is designed and manufactured in the same structure so that three sets of the relaying circuit group 4 can be easily stacked on three floors. Emergency power (quality monitoring) degradation diagnostic system, characterized in that to enable. The method according to claim 1 or 2, The constant current source circuit 5 receives a synchronized clock formed by dividing a basic clock from an MPU in the main controller unit 11, and the synchronized clock is divided by a known sinusoidal wave generation circuit 33 to generate a sine wave frequency. And the base clock of the MPU 11 and the frequency of the constant current source circuit 5 are always synchronized so that the phases of the AC constant current Is and the impedance AC voltage Vis can be accurately measured, and the AC current flows through the current transformer 41. The output current feedback signal (If) is inputted, and the feedback signal is converted into a DC feedback signal through the rectifying smoothing circuit 42, and the difference between the output current feedback value If and the current set value 43 (- ), The difference (-) signal is input (operated) to the amplitude adjusting terminal 10 of the sinusoidal wave generating circuit 33, and the synchronized clock signal at the time of starting the constant current source 5 is integrated Slow rising soft start signal (ss) is generated, and By inputting the soft start signal (ss) to the amplitude control terminal 10 of the sinusoidal wave generation circuit 33 through a diode, it is controlled to output a sinusoidal wave current in a steady state in a short time without overshoot during startup Emergency power (quality monitoring) degradation diagnosis system. The method according to claim 1 or 2, In the constant current source circuit 5, an AC sinusoidal waveform (signal) is output by a known sinusoidal wave generating circuit 33, and the AC sinusoidal waveform (signal) and the AC instantaneous current (If) feedback signal are added to the adder 34. Summing up, the output signal of the adder is current amplified by the first class B amplification circuit 35, and the output of the amplifying circuit 35 is a high frequency signal in which the secondary side is composed of two windings and reversely connected in parallel. It is connected to the primary winding of the transformer T2, and the secondary output of the high frequency signal transformer T2 becomes a signal of sine wave and cosine wave having 180 degree phase difference from each other, and the two signals are second It is amplified by the class B amplifier circuit 37 and the output of the second class B amplifier circuit 37 is insulated by being connected to the input of the insulating circuit 38 and the output of the insulating circuit 38 is used for measuring the internal impedance of the battery. Operating as a current source, the first class B amplifier 35 is NPN An output of the operational amplifier U3 is connected to the bases of the transistors Q1 and Q2, and each emitter terminal of the transistor is connected to an inverting (-) input terminal of the operational amplifier U3, and the second B The amplification circuit 37 is composed of an output transformer TM1 having a central tap of the primary winding connected to the positive pole of the power supply and a start point and an end point of the winding connected to each collector of the NPN transistors Q3 and Q4, respectively. It is insulated and supplies constant current Is through the current transformer CT, so that the maximum current within the limit does not affect the battery in order to increase the resolution of the measured value without affecting the characteristics and life of the battery during the internal impedance measurement of the battery. Emergency power (quality monitoring) degradation diagnostic system, characterized in that the supply to the storage battery The method according to claim 1 or 2, The period and average calculation program step inputs the input AC voltage (V _1s ) and the current (Is) signal to the A / D converter, respectively, and the magnitude of the AC voltage (V _1s ) and the current (I _s ) signal is A / D. The point of time (Z _{C_V} , Z) that is output by the converter and the AC voltage (V _1s ) and the current (Is) signal are respectively input to a zero crossing circuit and change from negative (+) to positive (+). _{C_I} ) is measured by a zero crossing detector circuit, and the zero crossing detector circuit includes a first zero pass signal Z _CV1 and a second zero pass signal Z _CV2 of the AC voltage V1s. Outputs the third zero pass signal Z _cI1 and the fourth zero pass signal Z _CI2 of the AC current V _1s , and outputs the first zero pass signal Z _CV1 and the second zero point. The pass signal Z _CV2 , the third zero pass signal Z _cI1 , and the fourth zero pass signal Z _CI2 are input to the high speed timer / counter, and the high speed timer / counter 172 is the first voltage counter data T _V1 and the second voltage counter data T _V2 and the first current counter data Ti1 when the zero pass signals Z _CV1 , Z _CV2 , and Z _cI1 are input. ), And calculates a period of the AC voltage V _1s signal or AC current I _s from the difference between the first voltage counter data T _V1 and the second voltage counter data T _V2 , and The phase difference between the AC voltage V _1s and the AC current I _s is calculated from the difference between the first voltage counter data T _V1 and the first current counter data Ti1, and the phase difference between the two signals is converted into the AC voltage. (V _1s), each phase difference of the two signals for the period by dividing the period (T _v) of the signal ( The emergency power (quality monitoring) degradation diagnosis system, characterized in that the internal impedance value is precisely calculated based on these data. The method according to claim 1 or 2 When the harmonic ripple voltage is mixed and enters the input terminal of the MPU 11, in the first section T1, the MPU 11 does not apply the constant current Is, and the instantaneous ripple voltage of the battery cell during floating charging ( Vrp) is acquired and stored, and the internal high-speed timer / counter value tmin1 at the moment when the voltage instantaneous value Vrp reaches the lowest (high) point and the counter value (tmin2) reached the next lowest (high) point Read and store the value, calculate the difference between the two values to recognize the value as a counter value (trp) corresponding to the period (Trp) of the ripple voltage (Vrp), the voltage instantaneous value (Vrp) stored in the unit It is stored in the memory (shift register) inside the MPU 11 and is always updated with the latest data. After that, a constant current source is started at ΔT time interval, and the constant current Is is supplied to the battery cell, and the second section ( At T2), the time when the counter value inside the MPU 11 reaches the minimum (high) point tmin1 is reached. Interrupt is executed at the moment when the value is increased from trp to N times, and the interrupt program is executed. The ripple voltage output (Vrp) and the ripple currently being input are included. Simultaneously read the AC voltage instantaneous (Vrp + Vis) value to calculate the difference between the two values ((Vrp + Vis)-Vrp), and calculate the pure impedance voltage (Vis) value which is not affected by the ripple voltage from the two values, Emergency power (quality monitoring) degradation diagnostic system designed to improve measurement accuracy during floating charging A system or an uninterruptible power supply system for diagnosing the health condition (deterioration) of a battery by a central processing unit (hereinafter referred to as an MPU) capable of numerical operation such as a microprocessor by measuring characteristic data of a plurality of battery cells provided in a plurality of emergency power devices. A system for monitoring the operating status of a plurality of emergency power systems 18 using a plurality of batteries, such as rectifiers used as emergency power of a communication network, as power equipment, and at the same time diagnosing the health status (deterioration) of the plurality of batteries used. To All measurement diagnostic systems 164, 164-a, 164-b, 164-n are configured in a modular form with the same shape and structure, and the measurement diagnostic systems are interconnected and designated using a communication port 163 provided therein. The main measurement diagnosis system 164 may perform bidirectional communication with each slave measurement diagnosis system 164-a, 164-b, 164-n through a communication port, and the slave measurement diagnosis system 164-a, 164-b, 164-n can be connected to the local monitoring system 169-a, 169-b, 169-n as a serial port and wireless telecommunication via a wireless communication port connected to the main measurement diagnostic system 164. Remote network communication is possible through the local monitoring system 169 connected to the main measurement diagnosis system 164, and all the measurement diagnosis systems 164, 164-a, 164-b, and 164-n are internally connected. All remote control stations capable of serial communication besides each local monitoring system through the provided communication port A console device or the like may be connected, and data of all slave measurement diagnosis systems 169-a, 169-b, and 169-n interconnected to a communication port from a local monitoring system 169 connected to the main measurement diagnosis system 164 may be connected. Emergency power deterioration diagnosis (quality monitoring) system configured to enable control such as inquiry and parameter value adjustment. The method of claim 10, The slave measurement diagnostic system 164-a,-b,-n is replaced by an emergency power supply 170 such as any UPS or rectifier with which the communication protocols are compatible with each other, and the serial port in the emergency power supply. The serial port of the same type provided in the main measurement diagnosis system 164 can be interconnected, and the emergency power supply device can be monitored and controlled by the local monitoring system 169 connected to the main measurement diagnosis system 164. Emergency power supply (quality monitoring) degradation diagnostic system, characterized in that for monitoring and controlling the emergency power supply unit 170 via a remote network communication connected to the main measurement diagnostic system. The method of claim 1 There is no relay circuit group 4, and it is connected (directly) to the positive and negative poles of the battery cell for measuring the four terminals of the four-terminal network connected to the input circuit of the MCU 11, respectively, and connected to the main controller unit ( When the measurement is started by receiving an external signal from the MCU, the MPU 1 applies a pulse signal of several Khz to the constant current source circuit 5 and starts it, thereby generating the constant current Is generated by the constant current source circuit 5. ) Is input to the capacitor through a four-terminal network, and characteristic data such as terminal voltage (V), current (Is), temperature (t), and specific gravity (G) of the connected battery are amplified by the automatic scale circuit (7). The internal of the battery by the impedance calculation program consisting of the period and average calculation program step and the effective value, phase difference, and impedance calculation step, which are inputted to the MPU 1 through the A / D converter 6 and built into the MPU 1. Calculate impedance and store the characteristic data The state history data of the battery cell is calculated by the built-in program in the MPU 1 on the basis of the internal impedance, and the characteristic data and the internal impedance value and the battery cell state history data of the battery cell are stored in the memory 2 and Repeat this sequence of steps and each of the above steps to measure and repeat other cells and send them to the notebook PC, server or host via a communication (port) device such as RS232, RS422, RS485 or CDMA, if necessary. Emergency power (quality monitoring) degradation diagnostic system, characterized in that it is operated to enable. The method according to claim 1 or 2, Long-distance network communication uses a wireless communication network such as CDMA or an online network such as the Internet by using a communication port built in an emergency power (quality) monitoring system, and establishes a fixed IP on a host connected to one measurement diagnosis system. N two emergency power (quality monitoring) diagnosis system and a telecommunication network for both sides of the communication and remotely monitor the operating state of the N emergency power devices from the host to diagnose the health (deterioration) state of the emergency power device Post-management system of the emergency power (storage battery) device, characterized in that.