JP6953134B2 - Uninterruptible power supply deterioration diagnosis system and its diagnosis method - Google Patents

Description

The present invention relates to an uninterruptible power supply deterioration diagnostic system and a diagnostic method thereof.

Generally, an uninterruptible power supply is used to avoid a sudden power supply interruption to a computer device. When the power supply is cut off, the uninterruptible power supply starts supplying power to the connected device and supplies power until the device is safely stopped. However, if the lead storage battery of the uninterruptible power supply is significantly deteriorated, it may not be possible to supply the expected amount of power.

Patent Document 1 describes "a power supply unit, a plurality of storage batteries connected in parallel to each other so as to input the output of the power supply unit, a means for detecting the full charge of each storage battery, and the detection means. When it is detected that one storage battery has reached full charge, the connection switching means for connecting the other storage battery to the power supply unit at the same time as releasing the storage battery and the open circuit voltage are detected after a predetermined time has elapsed after the full charge is detected. A storage battery charging device, which comprises means for calculating the capacity of the storage battery from the detected open circuit voltage, and a means for calculating the capacity of the storage battery.

Japanese Unexamined Patent Publication No. 8-228441

In the above technique, one of the two batteries can be opened to measure the open circuit voltage and the deterioration can be identified from the voltage without requiring a special device. However, since two batteries are required and the open circuit voltage is measured, it is necessary to take a long discharge time for deterioration diagnosis, and the operational load before and after the diagnosis is high. Further, since a "connection switching means" for switching between two batteries is required for deterioration diagnosis, there is a limit to the uninterruptible power supply capable of performing deterioration diagnosis.

An object of the present invention is to provide a technique capable of more easily detecting deterioration of a lead storage battery of an uninterruptible power supply.

The present application includes a plurality of means for solving at least a part of the above problems, and examples thereof are as follows. The non-disruptive power supply deterioration diagnosis system according to one aspect of the present invention is a load applying unit that gives a resistance load that can be increased or decreased to a lead storage battery, and an attachment / detachment that detects an instantaneous voltage value from the lead storage battery to which the resistance load is applied. A possible voltage detection unit, a detachable current detection unit that detects an instantaneous current value from the lead storage battery to which the resistance load is applied, and a plurality of states in which the lead storage battery is subjected to the resistance load different from each other. The resistance calculation unit that calculates the series resistance using the difference in the change in the instantaneous voltage value and the difference in the change in the current instantaneous value detected in, and the degree of deterioration of the lead storage battery according to the change over time in the series resistance. It is characterized by including a resistance determination unit for determining.

Further, the uninterruptible power supply deterioration diagnosis system is characterized in that it includes an oscillating unit that oscillates at a predetermined cycle, and the load applying unit increases or decreases the resistance load according to the oscillating cycle of the oscillating unit. It may be something to do.

Further, in the uninterruptible power supply deterioration diagnosis system, the resistance determination unit determines that the lead storage battery has deteriorated when the series resistance exceeds a predetermined threshold value. May be good.

Further, in the uninterruptible power supply deterioration diagnosis system, the resistance determination unit determines that the lead storage battery has deteriorated when the increase degree of the series resistance exceeds a predetermined threshold value. It may be a thing.

Further, the non-disruptive power supply deterioration diagnosis system according to another aspect of the present invention has a removable voltage detection unit that detects an instantaneous voltage value from a lead storage battery connected to an inverter, and an instantaneous current value from the lead storage battery. The detachable current detector to detect, the RMS (Root Mean Square) value of the ripple component due to the operation of the inverter of the voltage instantaneous value, and the RMS value of the ripple component due to the inverter operation of the current instantaneous value. It is characterized by including a resistance calculation unit for calculating the series resistance using the above, and a resistance determination unit for determining the degree of deterioration of the lead storage battery according to the change with time of the series resistance.

Further, in the non-disruptive power supply deterioration diagnosis system, the resistance calculation unit sets the moving average period using the inverse of the frequency of the AC power supply supplied to the inverter, and sets the moving average period, and the voltage instantaneous value and the current instantaneous value. It may be characterized in that the RMS value of the ripple component obtained by excluding the quasi-DC component in the moving average period is obtained.

Further, in the uninterruptible power supply deterioration diagnosis system, the resistance determination unit determines that the lead storage battery has deteriorated when the series resistance exceeds a predetermined threshold value. You may.

Further, in the uninterruptible power supply deterioration diagnosis system, the resistance determination unit determines that the lead storage battery has deteriorated when the increase degree of the series resistance exceeds a predetermined threshold value. It may be a thing.

Further, in the method of diagnosing the deterioration of the non-disruptive power supply using the non-disruptive power supply deterioration diagnosis system according to another aspect of the present invention, the above-mentioned non-disruptive power supply deterioration diagnosis system is a load that gives a resistance load that can be increased or decreased to the lead storage battery. An application step, a voltage detection step of detecting an instantaneous voltage value from the lead storage battery to which the resistance load is applied, and a current detection step of detecting an instantaneous current value from the lead storage battery to which the resistance load is applied. A resistance calculation step of calculating the series resistance using the difference in the change in the instantaneous voltage value and the difference in the change in the current instantaneous value detected in a plurality of states in which the lead storage batteries are subjected to the different resistance loads. The resistance determination step of determining the degree of deterioration of the lead storage battery according to the change over time of the series resistance is carried out.

Further, in the method for diagnosing deterioration of the uninterruptible power supply, the uninterruptible power supply deterioration diagnosis system includes an oscillating unit that oscillates at a predetermined cycle. It may be characterized in that the resistance load is increased or decreased.

Further, in the method for diagnosing deterioration of an uninterruptible power supply, the resistance determination step is characterized in that when the series resistance exceeds a predetermined threshold value, it is determined that the lead storage battery has deteriorated. It may be.

Further, in the method for diagnosing deterioration of the uninterruptible power supply, the resistance determination step is characterized in that when the degree of increase in the series resistance exceeds a predetermined threshold value, it is determined that the lead storage battery has deteriorated. It may be.

Further, in the method of diagnosing the deterioration of the non-disruptive power supply using the non-disruptive power supply deterioration diagnosis system according to another aspect of the present invention, the above-mentioned non-disruptive power supply deterioration diagnosis system is a voltage instantaneous value from a lead storage battery connected to an inverter. The voltage detection step for detecting the voltage, the detachable current detection step for detecting the instantaneous current value from the lead storage battery, the RMS value of the ripple component due to the operation of the inverter for the voltage instantaneous value, and the inverter for the current instantaneous value. It is characterized by carrying out a resistance calculation step of calculating the series resistance using the RMS value of the ripple component due to the operation and a resistance determination step of determining the degree of deterioration of the lead storage battery according to the time course of the series resistance. And.

Further, in the method for diagnosing deterioration of the uninterruptible power supply, in the resistance calculation step, the moving average period is set using the inverse of the frequency of the AC power supply supplied to the inverter, and the instantaneous voltage value and the current are used. It may be characterized in that the RMS value of the ripple component obtained by excluding the quasi-DC component in the moving average period of the instantaneous value is obtained, respectively.

Further, in the method for diagnosing deterioration of an uninterruptible power supply, the resistance determination step is characterized in that when the series resistance exceeds a predetermined threshold value, it is determined that the lead storage battery has deteriorated. It may be.

Further, in the method for diagnosing deterioration of the uninterruptible power supply, the resistance determination step is characterized in that when the degree of increase in the series resistance exceeds a predetermined threshold value, it is determined that the lead storage battery has deteriorated. It may be.

According to the present invention, deterioration of the lead storage battery of the uninterruptible power supply can be detected more efficiently.

Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

It is a block diagram of the deterioration diagnosis system which concerns on 1st Embodiment. It is a figure which shows the hardware configuration example of the resistance value calculation part of a deterioration diagnosis system. It is a figure which shows the flow of resistance determination processing. It is a figure which shows the hardware configuration example of the resistance determination part. It is a figure which shows the output screen example of a resistance determination process. It is a block diagram of the deterioration diagnosis system which concerns on 2nd Embodiment. It is a figure which shows the flow of resistance determination processing. It is a figure which shows the output screen example of a resistance determination process. It is a figure which shows the example of the deterioration judgment possible time by the general output voltage measurement.

The deterioration diagnosis system 1 to which the first embodiment of the present invention is applied will be described below with reference to the drawings.

Generally, the UPS (Interruptible Power Supply) device refers to an AC input / AC output device, but the present embodiment is not limited to this, and an AC input / DC output device may be used.

The UPS device is a device having a rechargeable battery such as a lead storage battery inside, and supplies the power necessary for the safe stop of the connected device when the power supply is cut off. Therefore, if the rechargeable battery deteriorates, the connection device may not be stopped safely and its function may become insufficient. Therefore, it is essential to use a regular or quantitative index to determine when to replace the rechargeable battery.

In such an operation, since the rechargeable battery is fully charged in the operating state where the power is supplied to the uninterruptible power supply, the connection with the device to be supplied with the power is not disconnected and the battery is discharged as much as possible. It is required to easily diagnose deterioration in a short time without increasing the depth.

On the other hand, when the output voltage of a lead storage battery, which is generally used as a rechargeable battery, is measured after it starts discharging, the voltage drops sharply at the beginning, and the voltage drop becomes gentle in the middle after a certain period of time. .. Then, it is generally known that the voltage drops sharply again at the end of the period. This tendency is the same for a deteriorated rechargeable battery, but a deteriorated rechargeable battery tends to reach the final stage earlier than the elapsed time. Further, when the connection resistance connected to the outside of the rechargeable battery is large, it tends to be difficult to detect the voltage lowering component due to the deterioration of the rechargeable battery.

Therefore, even if only the voltage drop is measured, it is not easy to detect the voltage drop due to the deterioration of the rechargeable battery. For example, in a lead storage battery given a resistance load of 500 watts, only the voltage drop is measured. In some cases, it may be necessary to observe the battery for 200 seconds or more from the start of discharge in order to determine whether or not the battery is a deteriorated battery. An example of such an observation is shown in FIG.

FIG. 9 is a diagram showing an example of a time when deterioration can be determined by general output voltage measurement. FIG. 9 shows a graph 400 in which the vertical axis is the battery voltage and the horizontal axis is the elapsed time. In Graph 400, an example of two voltage drops observed in a normal (lightly deteriorated) rechargeable battery and two voltage drops observed in a deteriorated (severely deteriorated) rechargeable battery. An example of is shown.

In the initial discharge 410, the deteriorated rechargeable battery showed almost no difference from the voltage of the normal rechargeable battery. After 200 seconds had passed, a phenomenon was observed in which the voltage of the deteriorated rechargeable battery dropped earlier than the voltage of the normal rechargeable battery. In other words, it can be said that it is not possible to judge the deterioration within 200 seconds from the start of discharge by observing only the voltage.

Deterioration of lead-acid batteries is caused by repeated reduction of the effective area of the electrode due to the generation of sulfation (non-conducting crystal film) due to discharge, which causes PbSO ₄ (sulfate) to adhere to the electrode and increase the internal resistance. It is believed that this will occur.

Furthermore, in the case of a deteriorated rechargeable battery, the adhered sulfation has already reduced the effective area of the electrode, so that sulfation generated by further discharge is rapidly generated, and the internal resistance is rapidly increased. Is expected to be.

FIG. 1 is a block diagram of the deterioration diagnosis system 1 according to the first embodiment. The deterioration diagnosis system 1 includes an uninterruptible power supply device and a deterioration diagnosis device 110. The uninterruptible power supply includes at least a rechargeable battery 10 and an inverter 11. Further, the deterioration diagnosis system 1 includes a first resistance load 12 such as a server device connected so as to enjoy the function of the uninterruptible power supply device. The deterioration diagnosis device 110 includes a second resistance load 13 such as a resistor connected for deterioration diagnosis, a switch 14, a current sensor 15, a voltage difference detection unit 21, a resistance calculation circuit 23, and a current. The difference detection unit 31, the resistance determination unit 40, and the output unit 50 are included. When operating the uninterruptible power supply, the rechargeable battery 10, the inverter 11, and the first resistance load 12 are connected to each other.

The voltage difference detection unit 21 acquires the instantaneous voltage value 20 of the rechargeable battery 10 via the removable voltage sensor 16 or the inverter 11 that acquires the voltage between the terminals of the rechargeable battery 10, and the switch 14 obtains the second resistance. The difference (difference voltage 22) of the instantaneous voltage values between the state in which the load 13 is applied and the state in which the load 13 is not applied is detected.

The current difference detection unit 31 acquires the instantaneous current value 30 output by the rechargeable battery 10 via the current sensor 15 or the inverter 11 that is detachably attached between the negative electrode of the rechargeable battery 10 and the inverter 11, and switches. The difference (difference current 32) of the instantaneous current value between the state in which the second resistance load 13 is given and the state in which the second resistance load 13 is not given is detected by 14.

The resistance calculation circuit 23 divides the difference voltage by the difference current and calculates the resistance value using Ohm's law. The resistance determination unit 40 determines the deterioration of the rechargeable battery 10 by using the resistance value calculated by the resistance calculation circuit 23. The output unit 50 receives the determination of deterioration made by the resistance determination unit 40 and outputs the determination result to a predetermined output screen.

FIG. 2 is a diagram showing a hardware configuration example of the resistance value calculation unit of the deterioration diagnosis system. In the resistance value calculation unit 100, the second resistance load 13 and the switch 14 for connecting the second resistance load 13 on the circuit are connected to the inverter. Then, the switch 14 is opened and closed according to the oscillation of the oscillating element, so that the resistance load applied to the battery is changed. That is, it can be said that the switch 14 and the second resistance load 13 are load applying portions that give a resistance load that can be increased or decreased to the lead storage battery.

Further, the resistance value calculation unit 100 includes a difference acquisition circuit corresponding to the voltage difference detection unit 21 which is connected to the battery side voltage sensor corresponding to the inverter 11 of the rechargeable battery or the voltage sensor 16 and acquires the voltage instantaneous value 20 of the battery. , The difference acquisition circuit corresponding to the current difference detection unit 31 which is connected to the battery side current sensor corresponding to the current sensor 15 and acquires the current instantaneous value 30 of the battery, and the voltage difference value divided by the current difference value. It includes a division circuit corresponding to the resistance calculation circuit 23 that outputs as a resistance value.

The voltage difference acquisition circuit is provided with a plurality of latches, and outputs a voltage difference from the state in which the previous resistance load is applied each time the resistance load applied to the battery is changed according to the oscillation of the oscillating element. That is, in the voltage difference acquisition circuit, the voltage in which the first resistance load 12 is applied to the battery and the state in which the first resistance load 12 and the second resistance load 13 are applied to the battery. The difference between the voltage and the voltage can be obtained.

The current difference acquisition circuit is provided with a plurality of latches, and outputs the current difference from the state in which the previous resistance load is applied each time the resistance load applied to the battery is changed according to the oscillation of the oscillating element. That is, in the current difference acquisition circuit, the current flowing in the state where the first resistance load 12 is applied to the battery and the state in which the first resistance load 12 and the second resistance load 13 are applied to the battery. The difference between the current flowing in and the current flowing in can be obtained. Further, since the acquisition timing is the timing according to the oscillation synchronized with the voltage difference acquisition circuit uniformly delayed, it is possible to acquire the voltage instantaneous value and the current instantaneous value in the same resistance load state. can.

The division circuit calculates the resistance by dividing the voltage by the current according to Ohm's law. In the present embodiment, the division circuit acquires a series resistance component using the difference between the instantaneous voltage values in the different resistance load states and the difference in the current instantaneous values in the different resistance load states, and resists the resistance determination unit 40. It can be said that it can be passed as a value.

FIG. 3 is a diagram showing a flow of resistance determination processing. The resistance determination process is information processing for resistance determination executed by the resistance determination unit 40. The resistance determination unit 40 is a control unit that performs resistance determination processing, and is realized by a program that causes an arithmetic unit 111, which will be described later, to perform processing. This program is stored in a main storage device 112, an external storage device 113 or a ROM device (not shown), which will be described later, is loaded on the main storage device 112 for execution, and is executed by the arithmetic unit 111.

The details of the resistance determination process will be described. First, the resistance determination unit 40 acquires the resistance value (step S101). Specifically, the resistance determination unit 40 acquires the resistance value output from the resistance value calculation unit 100.

Then, the resistance determination unit 40 acquires the moving average (step S102). Specifically, the resistance determination unit 40 is the reciprocal of the AC basic frequency of the power supply (in the case of Japan, 50 Hz (hertz) in eastern Japan, 60 Hz in western Japan) from the resistance value output from the resistance value calculation unit 100 (eastern Japan). Then, the moving average of the resistance value is calculated with 20 ms (millisec) as the moving average section. As a result, the main noise is removed from the resistance value. This is because the components that are integral multiples of the AC fundamental frequency tend to increase.

Then, the resistance determination unit 40 determines whether or not the processing is the first time within a predetermined time (step S103). If it is the first time (if it is "Yes" in step S103), the input value is set as the initial value (step S104). Specifically, the resistance determination unit 40 regards the moving average of the resistance values acquired in step S102 as an input value and sets the initial value of the resistance value. Then, the control proceeds to step S105.

If it is not the first time (if it is "No" in step S103), or after the execution of step S104, the resistance determination unit 40 subtracts the initial value from the input value (step S105). Since the internal resistance and connection resistance of the battery vary depending on the battery and its connection status, the variation can be suppressed by removing the offset in this way.

Then, the resistance determination unit 40 determines whether or not a predetermined time (for example, 30 seconds) has elapsed (step S106). If it has not elapsed (in the case of "No" in step S106), the resistance determination unit 40 returns the control to step S101 while continuing the timing.

Then, the resistance determination unit 40 determines whether or not the moving average resistance value is within a predetermined threshold value (step S107). Specifically, the resistance determination unit 40 compares the offset resistance value calculated in step S105 with a predetermined threshold value, and if it is smaller than the predetermined threshold value (in the case of “Yes” in step S107), proceeds to step S109. The control is advanced, and the output unit 50 is made to execute a display output indicating that the battery is in a normal state. When the threshold value is not smaller than the predetermined threshold value (“No” in step S107), the output unit 50 is made to execute a display output indicating that the battery is in a deteriorated state and not in a normal state (step S108).

The above is the flow of the resistance determination process. According to the resistance determination process, if the increase in the series resistance component of the battery is equal to or greater than a predetermined value, it can be determined that the battery has deteriorated, and if not, it can be determined that the battery is normal.

FIG. 4 is a diagram showing a hardware configuration example of the resistance determination unit. The deterioration diagnosis device 110 includes the resistance value calculation unit 100 shown in FIG. 2, and includes a voltage sensor 121 and a current sensor 122 that can be attached to and detached from the rechargeable battery 10. These are connected to the arithmetic unit 111, the main storage device 112, and the external storage device 113 via the bus 114.

Although the output unit 50 is included in the deterioration diagnosis device 110, the deterioration diagnosis system 1 can also be configured by using an independent device such as an external monitor. In addition, the deterioration diagnosis device 110 may include an input device.

The arithmetic unit 111 is, for example, an arithmetic unit such as a CPU (Central Processing Unit).

The main storage device 112 is, for example, a memory device such as a RAM (Random Access Memory).

The external storage device 113 is a non-volatile storage device such as a so-called hard disk (Hard Disk Drive), SSD (Solid State Drive), or flash memory that can store digital information.

The input device is various input devices such as a keyboard, a mouse, and a touch panel.

The above is a hardware configuration example of the deterioration diagnosis device 110 including the resistance determination unit 40.

Each configuration of the deterioration diagnosis device 110 can be further classified into more components according to the processing content. It can also be categorized so that one component performs more processing.

Further, the resistance determination unit 40 may be constructed by dedicated hardware (ASIC, GPU, etc.) that realizes the function. Further, the processing of the resistance determination unit 40 may be executed by one hardware or may be executed by a plurality of hardware.

FIG. 5 is a diagram showing an example of an output screen of resistance determination processing. On the output screen 200, the diagnosis result and its supplementary information, for example, a message area 210 displaying instructions for specific actions to be taken and supplementary items for understanding the diagnosis result, and an effective series resistance are logged. A graph display area 220, an order preparation button 230 for receiving an instruction to start input for ordering a replacement product, and a diagnosis end button 240 for receiving an instruction to end the diagnosis are displayed.

When the replacement order preparation button 230 receives an input by click input, tap input, or the like, it starts control such as connecting to a purchase site where an online order for a rechargeable battery can be placed.

The above is the deterioration diagnosis system 1 according to the first embodiment. According to the deterioration diagnosis system 1, deterioration of the rechargeable battery connected to the UPS can be easily diagnosed. In particular, the deterioration diagnosis system 1 is excellent in that it can be diagnosed in a shorter period of time without changing the connection state for power supply.

More specifically, even in a lead storage battery with an uninterruptible power supply, which requires observation over time for 200 seconds or more from the start of discharge to determine whether the battery is a deteriorated battery when measuring only the voltage drop. According to the deterioration diagnosis system 1 according to the present embodiment that measures the resistance value, it is possible to determine the deterioration by observing with time for about 30 seconds.

Further, according to the deterioration diagnosis system 1 according to the first embodiment, since the output current is measured at the same time as the output voltage of the rechargeable battery, the resistance value can be acquired without being affected by the absolute value of the current change. can.

Furthermore, according to the deterioration diagnosis system 1 according to the first embodiment, since the change in the resistance component is tracked to determine the deterioration, the variation in the wiring resistance and the internal resistance depending on the characteristics of each battery is eliminated. It is possible to judge deterioration with high accuracy.

Moreover, the present invention is not limited to the above-described embodiment. The above embodiments can be modified in various ways within the scope of the technical idea of the present invention. For example, in the above embodiment, the internal resistance is calculated by applying a second resistance load to the rechargeable battery, but the present invention is not limited to this.

For example, in the second embodiment, the deterioration diagnosis system 1'can calculate the resistance by utilizing the ripple due to the switching of the inverter. Such a second embodiment will be described with reference to FIGS. 6-8.

FIG. 6 is a block diagram of the deterioration diagnosis system according to the second embodiment. In the second embodiment, the differences from the first embodiment will be mainly described.

First, in the second embodiment, the second resistive load 13 does not have to be present. Further, the voltage difference detection unit 21 and the current difference detection unit 31 are the RMS calculation unit 60 that acquires the RMS of the ripple voltage during 20 ms, which is the inverse of the AC cycle, and the RMS calculation unit 60 that acquires the RMS of the ripple current during the 20 ms, respectively. It is replaced with the RMS calculation unit 70 that acquires the RMS. Further, regarding the voltage acquired from the battery side voltage sensor 16 or the inverter 11, for example, the difference from the moving average of 20 ms is treated as a ripple component. Similarly, with respect to the current acquired from the battery-side current sensor 15 or the inverter 11, for example, the difference from the moving average of 20 ms is treated as a ripple component.

The cycle for acquiring the ripple current value is at most one-fourth of the AC cycle output by the uninterruptible power supply. In the division circuit 23, the quasi-DC resistance value is calculated by dividing the RMS value of the ripple voltage by the RMS value of the ripple current, and is passed to the resistance determination unit 40.

Further, the resistance determination process performed by the resistance determination unit 40 can also be as shown in FIG.

FIG. 7 is a diagram showing a flow of resistance determination processing according to the second embodiment. The resistance determination process according to the second embodiment is basically the same as the resistance determination process according to the first embodiment, but may be partially different. In the resistance determination process according to the first embodiment, deterioration is determined when the average resistance value exceeds a predetermined value, but the deterioration is not limited to this, and deterioration occurs when the increase amount of the average resistance value exceeds a predetermined value. May be determined.

In the example shown in FIG. 7, after the moving average is acquired in step S102, the amount of increase, that is, the slope is calculated by reducing the previously acquired data (moving average in the previous period) by the resistance determination unit 40 (step S203). .. Then, when the amount of increase becomes equal to or greater than a predetermined value, an output for displaying deterioration is performed (step S207, step S208), and when the amount of increase is within a predetermined threshold value, an output for displaying normality is performed (step S207). , Step S209).

FIG. 8 is a diagram showing an example of an output screen of resistance determination processing. On the output screen 300, the diagnosis result and its supplementary information, for example, the message area 310 in which the instruction of the action to be concretely performed and the supplementary matter for understanding the diagnosis result are displayed, and the effective series resistance are logged. A graph display area 320, an order preparation button 330 for receiving an instruction to start input for ordering a replacement product, and a diagnosis end button 340 for receiving an instruction to end the diagnosis are displayed.

When the replacement order preparation button 330 receives an input by click input, tap input, or the like, it starts control such as connecting to a purchase site where an online order for a rechargeable battery can be placed.

The above is the deterioration diagnosis system 1'related to the second embodiment. According to the deterioration diagnosis system 1'according to the second embodiment, the resistance can be calculated by using the ripple due to the switching of the inverter. No need.

Further, for example, in all of the above-described embodiments, the deterioration diagnosis system assumes a deterioration diagnosis device that operates independently, but the present invention is not limited to this.

For example, communication may be performed via a network to manage the results of each test of the diagnostic device. Then, the frequency of diagnosis may be increased as the degree of deterioration progresses. By doing so, it is possible to detect deterioration at an early stage while enabling long-term monitoring.

Further, the technical elements of the above-described embodiment may be applied independently, or may be applied separately in a plurality of parts such as a program component and a hardware component.

The present invention has been described above with a focus on embodiments.

1,1'... Deterioration diagnosis system, 10 ... Rechargeable battery, 11 ... Inverter, 12 ... First resistance load, 13 ... Second resistance load, 14 ... Switch, 15 ... Current sensor, 21 ... Voltage difference detection unit, 23 ... Resistance calculation circuit, 31 ... Current difference detection unit, 40 ... Resistance determination unit, 50 ... Output unit

Claims (14)

A load applying unit that gives a possible increase or decrease the resistance load on the lead storage battery,
A voltage detector detachable for detecting a voltage instantaneous value from the lead storage battery in which the resistive load is given,
A current detection unit detachable to detect the current instantaneous value from the lead storage battery in which the resistive load is given,
A resistance calculation unit for calculating a series resistance using the difference amount of the difference component and the current instantaneous value of said detected voltage instantaneous value at a plurality of different states said resistive load is applied to each other in the lead storage battery,
And determining the resistance determining unit deterioration degree of the lead storage battery in accordance with the temporal change of the series resistor,
Equipped with a,
The resistance determination unit calculates the moving average of the series resistance with the reciprocal of the AC fundamental frequency of the power supply as the moving average section, and determines the degree of deterioration of the lead storage battery.
Uninterruptible power supply deterioration diagnosis system which is characterized a call. The uninterruptible power supply deterioration diagnosis system according to claim 1.
Equipped with an oscillator that oscillates at a predetermined cycle
The load applying unit increases or decreases the resistance load according to the oscillation cycle of the oscillating unit.
An uninterruptible power supply deterioration diagnosis system characterized by this. The uninterruptible power supply deterioration diagnosis system according to claim 1 or 2.
The resistance determination unit determines that the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
An uninterruptible power supply deterioration diagnosis system characterized by this. The uninterruptible power supply deterioration diagnosis system according to claim 1 or 2.
The resistance determination unit determines that the degree of increase in the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
An uninterruptible power supply deterioration diagnosis system characterized by this. A voltage detector detachable for detecting a voltage instantaneous value from a connected lead storage battery to the inverter,
And detachable current detector for detecting a current instantaneous value from the lead storage battery,
A resistance calculation unit that calculates the series resistance using the RMS value of the ripple component due to the operation of the inverter of the voltage instantaneous value and the RMS value of the ripple component due to the operation of the inverter of the current instantaneous value.
And determining the resistance determining unit deterioration degree of the lead storage battery in accordance with the temporal change of the series resistor,
Equipped with a,
The resistance calculation unit sets the moving average period using the inverse of the frequency of the AC power supply supplied to the inverter, and excludes the quasi-DC component of the voltage instantaneous value and the current instantaneous value in the moving average period. Obtain the RMS value of each of the obtained ripple components.
Uninterruptible power supply deterioration diagnosis system which is characterized a call. The uninterruptible power supply deterioration diagnosis system according to claim 5.
The resistance determination unit determines that the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
An uninterruptible power supply deterioration diagnosis system characterized by this. The uninterruptible power supply deterioration diagnosis system according to claim 5.
The resistance determination unit determines that the degree of increase in the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
An uninterruptible power supply deterioration diagnosis system characterized by this. It is a method of diagnosing deterioration of an uninterruptible power supply using an uninterruptible power supply deterioration diagnosis system.
The uninterruptible power supply deterioration diagnosis system is
A load applying step of providing a possible increase or decrease the resistance load on the lead storage battery,
A voltage detection step of detecting a voltage instantaneous value from the lead storage battery in which the resistive load is given,
A current detecting step of detecting a current instantaneous value from the lead storage battery in which the resistive load is given,
And resistance calculation step of calculating a series resistance using the difference amount of the difference component and the current instantaneous value of said detected voltage instantaneous value at a plurality of different states said resistive load is applied to each other in the lead storage battery,
A resistance determination step of determining the degree of deterioration of the lead storage battery in accordance with the temporal change of the series resistor,
And carry out
In the resistance determination step, the moving average of the series resistance is calculated with the reciprocal of the AC fundamental frequency of the power supply as the moving average section to determine the degree of deterioration of the lead storage battery.
A method for diagnosing deterioration of an uninterruptible power supply. The method for diagnosing deterioration of an uninterruptible power supply according to claim 8.
The uninterruptible power supply deterioration diagnosis system is
Equipped with an oscillator that oscillates at a predetermined cycle
In the load applying step, the resistance load is increased or decreased according to the oscillation cycle of the oscillating unit.
A method for diagnosing deterioration of an uninterruptible power supply. The method for diagnosing deterioration of an uninterruptible power supply according to claim 8 or 9.
Wherein the resistance determining step determines that the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
A method for diagnosing deterioration of an uninterruptible power supply. The method for diagnosing deterioration of an uninterruptible power supply according to claim 8 or 9.
In the resistance determination step determines that the degree of increase in the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
A method for diagnosing deterioration of an uninterruptible power supply. It is a method of diagnosing deterioration of an uninterruptible power supply using an uninterruptible power supply deterioration diagnosis system.
The uninterruptible power supply deterioration diagnosis system is
A voltage detection step of detecting a voltage instantaneous value from a connected lead storage battery to the inverter,
A current detecting step of using a detachable current detector for detecting a current instantaneous value from the lead storage battery,
A resistance calculation step of calculating the series resistance using the RMS value of the ripple component due to the operation of the inverter of the voltage instantaneous value and the RMS value of the ripple component of the current instantaneous value due to the operation of the inverter.
A resistance determination step of determining the degree of deterioration of the lead storage battery in accordance with the temporal change of the series resistor,
And carry out
In the resistance calculation step, the moving average period is set using the inverse of the frequency of the AC power supply supplied to the inverter, and the quasi-DC component of the voltage instantaneous value and the current instantaneous value in the moving average period is excluded. Obtain the RMS value of each of the obtained ripple components.
Method of diagnosing the deterioration of the uninterruptible power supply, wherein a call. The method for diagnosing deterioration of an uninterruptible power supply according to claim 12.
Wherein the resistance determining step determines that the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
A method for diagnosing deterioration of an uninterruptible power supply. The method for diagnosing deterioration of an uninterruptible power supply according to claim 12.
In the resistance determination step determines that the degree of increase in the series resistance in the case above a predetermined threshold, the lead storage battery is deteriorated,
A method for diagnosing deterioration of an uninterruptible power supply.

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