JP4827624B2 - Battery deterioration monitoring system - Google Patents

Description

  The present invention relates to a battery deterioration monitoring system capable of, for example, automatically measuring a deterioration state of a backup power supply battery and remotely monitoring the battery.

  In recent years, an uninterruptible power supply equipped with a backup power supply battery is often connected to various devices such as communication devices and control devices in preparation for a power failure. Since the battery deteriorates due to secular change, it was decided to replace the battery regularly (for example, every 6 years).

  However, the regular replacement method has the following problems (a) to (d).

  (A) During periodic replacement, even a battery with still good performance may be replaced, which is economically inefficient.

  (B) A battery whose deterioration has progressed quickly may lose its performance before regular replacement. In this case, battery power cannot be supplied to the apparatus. Therefore, there is a problem that it cannot play its role in the event of a power failure.

  (C) When all batteries attached to a communication device, a control device, etc. are periodically exchanged, the user will go to the place where the device is installed, but the number of target devices is a few. In the case of a thousand or tens of thousands, it took a lot of effort to replace that many batteries.

  (D) In particular, communication devices are often arranged, for example, on the tops of utility poles or on the rooftop / side walls of buildings, and work is difficult and work costs are high, such as the need to arrange an aerial work vehicle. It was. In addition, there is a problem that such work at high places is dangerous.

  As a method for solving the problems (a) to (d), instead of periodically replacing all the batteries, the deterioration state of the batteries was measured with a measuring instrument, and it was determined that replacement was necessary. There is also a technique for replacing only the battery. Various battery measuring instruments are known and disclosed in, for example, the following documents.

JP 2000-329834 A Japanese Patent No. 3006800 JP-A-6-342045 JP-A-6-94809

  However, even if a conventional measuring instrument is used to measure the deterioration state of the battery, there are the following problems (A) to (E).

  (A) The deterioration state of each battery could not be grasped finely and continuously in time series. Therefore, it has not been possible to grasp a battery whose deterioration proceeds rapidly.

  (B) It has been desired to construct a battery deterioration remote monitoring system that can grasp the replacement object and the replacement time when necessary.

  (C) When measuring with a measuring instrument, the lead wire is connected to the battery terminal, so even if the measuring instrument is used, it is necessary to go to the place where the battery is installed. There is no change, and it still takes effort.

  (D) As in the past, there was a problem that work was difficult and work cost was high, such as requiring an aerial work vehicle, and that work at such a high place was dangerous.

  (E) Since the measurement is performed once with a measuring instrument and then the battery is replaced as necessary, the number of battery replacements may be reduced. However, since the measurement man-hour and the exchange man-hour are generated, there is a problem that the work man-hour is increased.

  An object of this invention is to provide the battery deterioration monitoring system which solved such a conventional subject.

  The present invention is a battery deterioration monitoring system for monitoring a deterioration state of a battery for a backup power supply that is always charged, a measurement sensor for measuring a voltage and a deterioration state of the battery, and first and second controls. Means, first and second comparison means, determination means, and output means.

  The first control means measures a first set time which is a measurement interval, and causes the measurement sensor to measure the voltage and the deterioration state of the battery at each first set time, thereby obtaining a first measured voltage result. And the first measurement deterioration state result is output. The first comparing means includes a first voltage range not less than a specified value, a second voltage range representing a usable voltage range that is lower in potential than the first voltage range and usable, and the second voltage A third voltage range representing a voltage state during discharge or charging after discharge and a fourth voltage range representing an overdischarge state lower than the third voltage range. Thus, it is compared with which voltage range the first measurement voltage result belongs, and the first comparison result is output.

  When the first comparison result is “belonging to the third voltage range”, the second control means measures a second setting time until the battery is completely charged, and the second setting means After the elapse of time, the voltage and deterioration state of the battery are measured by the measurement sensor, and the second measurement voltage result and the second measurement deterioration state result are output. The second comparison means compares the first to fourth voltage ranges with reference to which voltage range the second measurement voltage result belongs to, and outputs a second comparison result To do.

  The determination means compares the first or second measured deterioration state result with a set value when the first or second comparison result belongs to the “second voltage range”, and determines the remaining capacity of the battery. A certain life is determined. Further, the output means outputs information of caution and abnormality when the first or second comparison result is “belonging to the first voltage range” or “belonging to the fourth voltage range”, and Based on the determination result of the determination means, information on good, caution, or abnormality is output.

  According to the present invention, battery life deterioration can be automatically and periodically measured, so that remote monitoring of life deterioration is facilitated. In particular, when the voltage comparison process is performed by the first and second comparing means and the comparison result is charging or discharging after battery discharge, the voltage is again set after the second setting time is reached and fully charged. Since the comparison process is performed, it is possible to automatically determine the life deterioration with higher accuracy. As a result of the measurement, if it is determined that the battery life is deteriorated, the information of caution and abnormality is output, so that monitoring becomes easy.

  A battery deterioration monitoring system of the present invention is a system for remotely monitoring a deterioration state of a battery for a backup power source, and a measurement sensor for measuring a voltage and a deterioration state (for example, conductance) of the battery, It has a 2nd control means, a 1st, 2nd comparison means, a determination means, and an output means, and these are mounted in the uninterruptible power supply with the said battery.

  The first control means measures a first set time which is a measurement interval, and causes the measurement sensor to measure the voltage and the deterioration state of the battery at each first set time, thereby obtaining a first measured voltage result. And the first measurement deterioration state result is output. The first comparing means includes a first voltage range not less than a specified value, a second voltage range representing a usable voltage range that is lower in potential than the first voltage range and usable, and the second voltage A third voltage range representing a voltage state during discharge or charging after discharge and a fourth voltage range representing an overdischarge state lower than the third voltage range. Then, the first comparison result is output by comparing to which voltage range the first measurement voltage result belongs.

  When the first comparison result is “belonging to the third voltage range”, the second control means measures a second setting time until the battery is completely charged, and the second setting means After the elapse of time, the voltage and deterioration state of the battery are measured by the measurement sensor, and the second measurement voltage result and the second measurement deterioration state result are output. The second comparison means compares the first to fourth voltage ranges with reference to which voltage range the second measurement voltage result belongs to, and outputs a second comparison result To do.

  The determination means compares the first or second measured deterioration state result with a set value when the first or second comparison result belongs to the “second voltage range”, and determines the remaining capacity of the battery. Determine a certain lifetime. Further, the output stage outputs (displays) caution and abnormality information when the first or second comparison result is “belonging to the first voltage range” or “belonging to the fourth voltage range”. At the same time, based on the determination result of the determination means, information on good, caution, or abnormality is output (displayed), and important information among these information is transmitted to the remote monitoring device.

  FIG. 2 is a schematic configuration diagram illustrating the entire battery deterioration monitoring system according to the first embodiment of the present invention.

  For example, a communication device (for example, an optical transmission device FNU (Fiber Network Unit)) 2 to be connected to the uninterruptible power supply device is attached to the utility pole 1, and the uninterruptible power supply device (PS) is connected to the communication device 2. : Power Supply) 3. For example, the communication device 2 is attached to an empty space in the uninterruptible power supply 3. The uninterruptible power supply 3 incorporates a backup power supply battery 4 such as a lead storage battery that outputs a direct current (hereinafter referred to as “DC”) voltage of 13 V to 14 V, for example, and always supplies power from a power line (not shown). This is a device that supplies the emergency power to the communication device 2 when the power supply to the communication device 2 is stopped and the power supply to the communication device 2 is stopped (when a power failure occurs). A large number of utility poles 1 to which such communication equipment 2 and uninterruptible power supply 3 are attached are arranged.

  Each uninterruptible power supply 3 is provided with a measuring device 10 for measuring the deterioration state of the battery 4, and each measuring device 10 is connected to a transmission line (for example, wireless or wired) directly or via the communication device 2. Communication line) 30 is connected to a centralized monitoring device 41 in the center station 40. The centralized monitoring device 41 may be provided at a place other than the center station 40. The battery 4, the measuring instrument 10, the transmission path 30, and the centralized monitoring device 41 constitute the battery deterioration monitoring system according to the first embodiment.

  FIG. 1 is a schematic configuration diagram illustrating a main part of a battery deterioration monitoring system according to a first embodiment of the present invention.

  The measuring instrument 10 has a control circuit 11 that controls the entire measuring instrument. The control circuit 11 has functions as first and second control means, first and second comparison means, and determination means, and is composed of, for example, a microprocessor. The control circuit 11 has a central processing unit main body (hereinafter referred to as “CPU”) 11a, and a bus 11b is connected to the CPU 11a. The bus 11b includes a nonvolatile read-only memory (hereinafter referred to as “ROM”) 11c for storing programs and the like, a readable / writable memory (hereinafter referred to as “RAM”) 11d for storing work data and the like, and a time measuring means (hereinafter referred to as “RAM”). For example, a timer 11e, an analog / digital (hereinafter referred to as “A / D”) converter 11f that converts an analog signal into a digital signal, and a plurality of input / output (hereinafter referred to as “I / O”) ports 11g to 11g. 11k etc. are connected.

  In the control circuit 11, the temperature sensor 12 is displayed on the A / D converter 11f, the switch (SW) 13 is displayed on the I / O port 11g, the switch (SW) 14 is displayed on the I / O port 11h, and the I / O port 11i is displayed. The communication interface 16 is connected to the I / O port 11j, and the output means (for example, I / O interface) 17 is connected to the I / O port 11k. A measurement sensor 18 is connected to the communication interface 16, and an I / O interface 17 is connected to the centralized monitoring device 41 via the transmission path 30. Furthermore, a DC / DC converter 19 connected to the battery 4 is provided in the measuring instrument 10. The DC / DC converter 19 is, for example, a circuit that converts DC13V to DC14V applied from the battery 4 to DC5V and supplies this power supply voltage to each circuit in the measuring instrument 10.

  The voltage measured by the temperature sensor 12 is converted into a temperature from the voltage value and used for temperature correction of measurement data. The switch 13 sets an automatic measurement timer 11e in order to set a measurement cycle. The switch 14 is for manual measurement and initial value registration. The display 15 displays the determination result of the deterioration state with respect to the battery 4 by a display element (for example, a light emitting diode, hereinafter referred to as “LED”), and an orange LED (O) that displays information on abnormality (NG). ) 15a, green LED (G) 15b for displaying good information, yellow LED (Y) 15c for displaying caution information, and red LED (R) 15d for displaying abnormal (NG) information is doing. The display unit 15 may be composed of another display device such as a liquid crystal (LCD). The communication interface 16 is a circuit that mediates transmission / reception between the measurement sensor 18 and the I / O port 11j. The I / O interface 17 is a circuit that mediates transmission of an alarm signal from the I / O port 11k to the centralized monitoring device 41 and reception of a control signal from the centralized monitoring device 41 to the I / O port 11k. is there.

  The measurement sensor 18 detects the voltage and deterioration state of the battery 4, and measures the voltage and conductance of the battery 4 using the conductance method described in Patent Document 2, for example. In the conductance method, a weak current signal is sent from the measurement sensor 18 to the battery 4 to be tested, and the conductance G of the battery 4 is measured. How much electric capacity the battery 4 has. Is a method of measuring. More specifically, the battery is discharged periodically (constant frequency) by the four-terminal method, the battery current at the time of discharging is measured, and the conductance G = I / V is obtained. There is a correlation (correlation degree> 90%) between the conductance G and the actual discharge capacity (battery remaining capacity). If the conductance G is known, the remaining capacity (life) of the battery 4 is known, so that the accuracy is high. It's a method.

  This conductance measurement is said to be possible even in a discharged state, but a measurement error occurs in the discharged state, and the uninterruptible power supply 3 is installed in an environment where the temperature change such as the utility pole 1 is severe. Therefore, since measurement errors due to temperature changes become large, in order to solve these problems, in the first embodiment, measurement is not performed during discharging of the battery 4 and during charging after discharging, and a temperature sensor is used. The temperature of the conductance G is corrected based on the temperature data obtained in step 12.

(Operation of Example 1)
Operations in (A) initial setting mode, (B) automatic measurement mode, and (C) manual measurement mode in the battery deterioration monitoring system of the first embodiment will be described.

(A) Initial Setting Mode FIG. 3 is a flowchart showing an initial setting mode when the initial conductance of FIG. 1 is registered. The initial value (set value) is a conductance value when a new battery is operated.

  When registering an initial value (set value) of conductance (step S1), when the switch (SW) 14 is pressed and held for 3S (seconds) or longer (step S2), measurement is started under the control of the CPU 11a (step S3). Measurement instructions are sent to the measurement sensor 18 via the bus 11b, the I / O port 11j, and the communication interface 16. When there is no response from the measurement sensor 18 to the CPU 11a due to a failure on the measurement sensor 18 side, for example, the yellow LED (Y) 15c indicating the caution in the display unit 15 is lit for 3S (seconds), for example, under the control of the CPU 11a. (Step S3-1) The red LED (R) 15d indicating abnormality (NG) is turned on for 3S, for example (Step S3-2).

On the other hand, when the measurement sensor 18 operates normally and measures the terminal voltage and conductance of the battery 4 and sends the measurement results (measurement voltage B and measurement conductance) to the CPU 11a (when there is a measurement sensor response), the CPU 11a. Performs a comparison process on the measured voltage B (step S4). In this comparison process, it is compared whether the measured voltage B belongs to any of the following voltage ranges.
(I) a first voltage range not less than a specified value (for example, the maximum charging voltage of the uninterruptible power supply 3 is
Exceeding specified voltage range): B ≧ 14.4V
(Ii) a second voltage that is lower than the first voltage range and represents a usable voltage allowable range;
Voltage range (for example, between the minimum charging voltage and the maximum charging voltage of the uninterruptible power supply 3)
Normal voltage range): 14.4V> B ≧ 13.0V
(Iii) Voltage state lower than the second voltage range and being discharged or being charged after discharge
Is a third voltage range (for example, a voltage less than the minimum charging voltage of the uninterruptible power supply 3)
Range): 13.0V> B
Regarding the voltage range, in the initial setting mode, the operation state (overdischarge state, etc.) of the uninterruptible power supply 3 can be grasped visually, so that “overdischarge (10.8 V) provided in the automatic measurement mode described later is provided. The voltage range of ≧ B) is unnecessary.

  When the comparison result is B ≧ 14.4 V, the range is outside the specified value (incorrect data), so the process returns to step S3 and the measurement is performed again. The repetition (loop) of Steps S3 and S4 is performed up to three times, for example, and attempts to acquire a measurement value within a specified value range. If B ≧ 14.4V, the process is finished as it is, but the LED (Y) 15c and LED (R) 15d are lit for 3S as in the case where there is no response from the measurement sensor 18 in step S3. The information display process is performed. When the comparison result is 13.0 V> B, the CPU 11a is controlled so that the measured value at this time cannot be registered as an initial value (set value) because it is not in a fully charged state (during discharging or charging after discharging). The orange LED (O) 15a indicating a voltage abnormality (NG) is turned on, and the process is terminated.

  If the comparison result is 14.4V> B ≧ 13.0V, the battery 4 belongs to the allowable voltage range, so the temperature sensor 12 measures the ambient temperature under the control of the CPU 11a (step S5). The measurement voltage corresponding to the temperature detected by the temperature sensor 12 is converted into digital temperature data by the A / D converter 11f and sent to the CPU 11a. The CPU 11a performs a temperature correction calculation on the measured conductance measured by the measurement sensor 18 (step S6), and stores (registers) the corrected conductance as an initial value (set value) in the ROM 11c (step S7). After the registration is completed, the green LED (G) 15b indicating good is lit for 3S, for example, and the initial registration process is completed (step S8).

(B) Automatic Measurement Mode FIG. 4 is a diagram showing port read data A for setting a measurement cycle and the like using the switches 13 and 14 of FIG. 5A and 5B are flowcharts illustrating the automatic measurement mode of FIG.

  5A, when the power source of the measuring instrument 10 is turned on (step S10), the port read data A is determined by the initialization of the CPU 11a (step S11) (step S12). For example, when the port read data A ≠ 0 (1, 2, or 3) in FIG. 4 is input by the switch 13, the process proceeds to the timer setting process (step S13), and the port 14 sets the port read data A = 0. If entered, the process proceeds to the manual mode (connector (1)).

When port read data A ≠ 0 (1, 2, or 3) is input, the timer 11e is set under the control of the CPU 11a (step S13). For example, when the port read data A = 1, the measurement is performed at a cycle of one month. When the port read data A = 3, measurement is performed at a cycle of 1M (minute) for testing. When the timer 11e is set, the timer 11e performs a count (time up) operation (step S14), and when the count end time is reached, any one of the LEDs 15a to 15d is turned on under the control of the CPU 11a. In this case, all the LEDs 15a to 15d are turned off (step S15), and a measurement instruction is sent to the measurement sensor 18 (step S16). If there is no response from the measurement sensor 18, the process goes to the connector (2). If there is a response, the CPU 11a compares the voltage to which voltage range the measurement voltage B belongs to (below) ( Step S17).
(I) a first voltage range not less than a specified value (for example, the maximum charging voltage of the uninterruptible power supply 3 is
Exceeding specified voltage range): B ≧ 14.4V
(Ii) a second voltage that is lower than the first voltage range and represents a usable voltage allowable range;
Voltage range (for example, between the minimum charging voltage and the maximum charging voltage of the uninterruptible power supply 3)
Normal voltage range): 14.4V> B ≧ 13.0V
(Iii) Voltage state lower than the second voltage range and being discharged or being charged after discharge
A third voltage range representing (for example, a voltage range in which the uninterruptible power supply 3 is not fully charged)
: 13.0V>B> 10.8V
(Iv) a fourth voltage range (eg, a low potential overdischarge state lower than the third voltage range)
Voltage range in which the uninterruptible power supply 3 stops discharging)
: 10.8V ≧ B

  When B ≧ 14.4V, the loop processing of steps S16 and S17 is performed up to three times, and when B ≧ 14.4V still proceeds to the processing to the connector (2). If there is no response from the measurement sensor 18 in step S16, the process proceeds to the connector (2). When 13.0 V> B> 10.8 V, the process proceeds to the standby process for the connector (3). In the case of 10.8 V ≧ B, the battery 4 is in an abnormal state of overdischarge, so the orange LED (O) 15a and red LED (R) 15d indicating abnormality are turned on (steps S17-1, S17-). 2) The alarm (ALM) of the abnormal alarm output from the I / O interface 17 is transmitted to the centralized monitoring device 41 through the transmission line 30 for 30S (seconds) (step S18).

  When 14.4V> B ≧ 13.0V is normal, the temperature is measured by the temperature sensor 12 under the control of the CPU 11a (step S19), and then temperature correction is performed on the measured conductance (step S19). Step S20). The conductance whose temperature has been corrected is determined to be deteriorated by the CPU 11a based on the following determination criteria (step S21).

(I) When C> 0.65S (where S: initial temperature correction conductance, C: correction conductance)
Since the corrected conductance C is greater than 65% of the initial temperature corrected conductance S, it is determined that the battery 4 has a good life and the green LED (G) 15b is lit (step S21-1). In addition, although it is about the value of 0.65, this value is the minimum ratio with respect to the initial value (setting value) from which the battery capacity can be determined to be healthy, for example, from the “high temperature accelerated life test” of the target battery.
The high temperature accelerated life test is a technique for degrading the battery in a short period of time, and the battery life is accelerated by exposing the battery to a high temperature. According to the Arrhenius law, it is known that if the ambient temperature rises by 10 ° C., the lifetime becomes ½.

(II) When 0.65S ≧ C ≧ 0.6S Since the corrected conductance C is 65% or less of the initial temperature corrected conductance S, the life of the battery 4 is determined to be caution, and the yellow LED (Y) 15c is lit. (Step S21-2). In addition, although it is about the value of 0.6, this value is the minimum ratio with respect to the initial value (set value) from which the battery capacity can be determined as a state of caution, for example, from the “high temperature accelerated life test” of the target battery.

(III) When 0.6S> C Since the corrected conductance C is less than 60% of the initial temperature corrected conductance S, the life of the battery 4 is determined to be abnormal (NG), and the red LED (R) 15d is lit. (Step S21-3), an abnormality alarm (ALM) is transmitted from the I / O interface 17 to the centralized monitoring device 41 for 30S (seconds) via the connector (7) (Step S18). In addition, although it is about the value less than 0.6, this value is a ratio with respect to the initial value (setting value) which can determine with battery capacity shortage from the "high temperature accelerated life test" of an object battery, for example.

  5-2, when there is no response of the measurement sensor 18 from step S16 of FIG. 5-1 (connector (2)), the yellow LED (Y) 15c indicating caution is lit (step S16-). 1) The red LED (R) 15d indicating abnormality is turned on (step S16-2), and an abnormality alarm (ALM) is transmitted from the I / O interface 17 to the centralized monitoring device 41 for 30 S (seconds) ( Step S18).

  5-2, when the voltage comparison result in step S17 in FIG. 5-1 is during charging or discharging after battery discharge (13.0V> B> 10.8V) (connector (3)), the control of CPU 11a As a result, the LED (O) 15a indicating abnormality is turned on (step S17-3), and the timer 11e is set corresponding to the port read data A (step S22). When the port read data is A = 3 (test), for example, 30S (seconds) is set (step S23), and when A ≠ 3 (one month or three months), the battery 4 is fully charged. Time (for example, 24H (hour)) is set (step S24), and the set time is counted (time up) (step S25).

  When the set time has elapsed, the orange LED (O) 15a indicating abnormality is turned off (step S25-1) according to the instruction from the CPU 11a, and the measurement sensor 18 starts measurement (step S26), and the response from the measurement sensor 18 If there is none, the yellow LED (Y) 15b indicating attention is turned on (step S16-1), and the red LED (R) 15d indicating abnormality is turned on (S16-2). When the LED (R) 15d is turned on, an abnormality alarm (ALM) is transmitted from the I / O interface 17 to the centralized monitoring device 41 for 30S (seconds) (step S18).

  When there is a response from the measurement sensor 18 in accordance with the measurement instruction in step S26, the CPU 11a compares the measurement voltage B (step S27). When B ≧ 14.4V, the loop processing of steps S26 and S27 is performed up to three times, and when B ≧ 14.4V still proceeds, the process proceeds to the connector (2). If 14.4 V> B ≧ 13.0 V, it is normal, so the process proceeds to the temperature measurement process (step S19) in FIG. 5A via the connector (4). In the case of 13.0V> B, the process proceeds to the process of FIG. 5-1 (steps S17-1 and S17-2) via the connector (5), and the orange LED (O) 15a indicating abnormality (NG) is displayed. The red LED (R) 15d is turned on, and an abnormality alarm (ALM) is transmitted from the I / O interface 17 to the centralized monitoring device 41 for 30S (seconds) (step S18).

(C) Manual Measurement Mode FIG. 6 is a flowchart showing the manual setting mode of FIG.

  When performing local measurement for a test or the like on the measuring instrument side, when the setting of the switch 13 is set to the manual mode (port read data A = 0), it is shown in FIG. 5 via the connector (1). When the switch 14 is input (for example, the switch input time is less than 3S (seconds), step S31), the CPU 11a measures. The measurement sensor 18 starts measurement according to the instruction (step S32). When there is no response from the measurement sensor 18 to the CPU 11a, the yellow LED (Y) 15c indicating caution is lit for 3S (seconds), for example (step S32-1), and the red LED (R) indicating abnormality (NG) (R) ) 15d is lit for 3S, for example (step S32-2), and the process returns to step S30.

  When there is a response from the measurement sensor 18, the CPU 11a performs comparison processing for the measurement voltage B (step S33). If B ≧ 14.4V, the process returns to step S32 and the measurement is repeated up to three times. If B ≧ 14.4V still, the orange LED (O) 15a indicating the voltage abnormality (NG) and the red LED ( R) 15d is turned on for 3S (seconds), for example (steps S33-1, S33-2), and the process returns to the port input waiting process (step S30). In manual mode, it can be handled on the spot, so only an error is displayed and no alarm is output. When 13.0 V> B> 10.8 V, the orange LED (O) 15 a indicating abnormality (NG) is lit for, for example, 3 S (seconds) under the control of the CPU 11 a (step S 33-1), 10.8 V In the case of ≧ B, the orange LED (O) 15a and the red LED (R) 15d indicating voltage abnormality (NG) are lit for 3S (seconds), for example, as in the condition B ≧ 14.4V (step S33). -1, S33-2) Return to the port input waiting process (step S30).

  If the comparison result is 14.4V> B ≧ 13.0V, the battery 4 belongs to the allowable voltage range, so the temperature sensor 12 measures the ambient temperature under the control of the CPU 11a (step S34). The CPU 11a performs temperature correction calculation on the measured conductance measured by the measurement sensor 18 (step S35), and compares the corrected conductance C with the initial temperature corrected conductance S to determine the life of the battery 4 (step S35). S36).

  In the case of C> 0.65S, the corrected conductance C is larger than 65% of the initial temperature corrected conductance S. Therefore, it is determined that the life of the battery 4 is good, and the green LED (G) 15b is turned on (step S36-1). ). In the case of 0.65S ≧ C ≧ 0.6S, the corrected conductance C is 65% or less of the initial temperature corrected conductance S. Therefore, the life of the battery 4 is determined to be caution, and the yellow LED (Y) 15c is turned on. (Step S36-2). If 0.6S> C, the corrected conductance C is 60% or less of the initial temperature corrected conductance S. Therefore, the life of the battery 4 is determined to be abnormal (NG), and the red LED (R) 15d is turned on. (Step S36-3), the process returns to the port input waiting process (step S30).

(Effect of Example 1)
According to the first embodiment, there are the following effects (a) to (c).

  (A) Since the measurement is performed automatically and regularly (for example, once / one month, times / 3 months, etc.), it is easy to monitor the life deterioration of the battery 4. In particular, the voltage comparison process is performed in step S17 of FIG. 5-1, and if the comparison result is charging or discharging after battery discharge, the battery is fully charged in step S24 of FIG. Since the voltage comparison process is performed in S27, the life deterioration can be automatically determined with higher accuracy. Since manual measurement is also possible, local measurement can be performed on the measuring instrument side, which facilitates maintenance and inspection. Note that the program stored in the ROM 11c of the measuring instrument 10 is changed, a measurement instruction is issued from the centralized monitoring apparatus 41 to the measuring instrument 10, and remote measurement is possible on the centralized monitoring apparatus side under the control of the CPU 11a.

  (B) If it is determined as a result of measurement that the battery 4 has deteriorated in life, an alarm is output from the measuring instrument side toward the centralized monitoring device side, and the centralized monitoring device 41 displays or sounds an alarm in response to this. . This alarm makes it possible to determine that the battery 4 at any installation location has deteriorated and facilitate monitoring. Note that the program stored in the ROM 11c of the measuring instrument 10 and the monitoring program on the central monitoring apparatus side are changed, for example, a unique number is given to the measuring instrument 10, and the number is also notified to the monitoring apparatus side at the time of an alarm. According to the specifications, it is possible to specify which installation location the battery 4 has deteriorated, and it becomes easier to monitor the life deterioration.

  (C) As for the measuring instrument 10, a measurement sensor 18 using a precise conductance method is used, and the temperature sensor 12 measures the temperature of the battery installation place where the temperature changes drastically and measures at this measurement temperature. Since the temperature of the measurement value of the sensor 18 is corrected, the accuracy of determining the deterioration of the life of the battery 4 can be further improved. Note that the measurement sensor 18 may be one using another measurement method.

(Modification)
In addition, this invention is not limited to the said Example 1, A various deformation | transformation is possible. For example, the circuit configuration of the measuring instrument 10 in FIG. 1 and the processing contents of the measurement mode in FIGS. 3 to 6 can be changed to other circuit configurations and processing contents. Moreover, the installation place and usage method of the measuring instrument 10 of FIG. 2 are applicable to arbitrary installation places and uses.

It is a schematic block diagram which shows the principal part of the battery deterioration monitoring system in Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the whole battery deterioration monitoring system in Example 1 of this invention. It is a flowchart which shows the initial setting mode in the case of registering the initial conductance of FIG. It is a figure which shows the port reading data A for setting a measurement period etc. using the switches 13 and 14 of FIG. It is a flowchart which shows the automatic measurement mode of FIG. It is a flowchart which shows the automatic measurement mode of FIG. It is a flowchart which shows the manual setting mode of FIG.

Explanation of symbols

2 Communication equipment 3 Uninterruptible power supply 4 Battery 10 Measuring instrument 11 Control circuit 12 Temperature sensor 15 Display 18 Measuring sensor 41 Centralized monitoring device

Claims (5)

A battery deterioration monitoring system that monitors a deterioration state of a battery for a backup power source that is constantly charged,
A measurement sensor for measuring the voltage and deterioration state of the battery;
A first set time, which is a measurement interval, is measured, and the voltage and deterioration state of the battery are measured by the measurement sensor every first set time, and a first measurement voltage result and a first measurement deterioration state result are measured. First control means for outputting
A first voltage range that is equal to or greater than a specified value; a second voltage range that is lower in potential than the first voltage range and represents a usable voltage allowable range; and is lower in potential than the second voltage range. The first measurement based on a third voltage range representing a voltage state during discharging or charging after discharging and a fourth voltage range representing an overdischarge state having a lower potential than the third voltage range. A first comparison means for comparing whether the voltage result belongs to which voltage range and outputting a first comparison result;
When the first comparison result is “belonging to the third voltage range”, the second set time until the battery is fully charged is counted, and the measurement sensor detects the second set time after the second set time elapses. Second control means for measuring a voltage and a deterioration state of the battery and outputting a second measurement voltage result and a second measurement deterioration state result;
A second comparison unit that compares the first to fourth voltage ranges with respect to which voltage range the second measurement voltage result belongs to and outputs a second comparison result;
When the first or second comparison result is “belonging to the second voltage range”, the first or second measured deterioration state result is compared with a set value to determine the remaining life of the battery. A determination means;
When the first or second comparison result is “belonging to the first voltage range” or “belonging to the fourth voltage range”, information on caution and abnormality is output and based on the determination result of the determination unit Output means for outputting good, caution, or abnormality information;
A battery deterioration monitoring system comprising:   2. The battery deterioration monitoring according to claim 1, wherein the first or second measurement deterioration state result is based on conductance or a ratio of a temperature-corrected conductance obtained by correcting the conductance and an initial conductance. system.   The battery deterioration monitoring system according to claim 1 or 2, wherein the output means is a display for displaying information on the good, caution, and abnormality.   The battery according to claim 1 or 2, wherein the output means includes a display for displaying the good, caution, and abnormality information, and a transmission means for transmitting the information to a remote monitoring device. Deterioration monitoring system.   The battery, the measurement sensor, the first and second control means, the first and second comparison means, the determination means, and the output means are mounted on an uninterruptible power supply. The battery deterioration monitoring system according to any one of claims 1 to 4.

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