JP2006312528A - Electric power storage device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable electric power storage device of an elevator, by accurately predicting and notifying a service life progress degree of a storage battery. <P>SOLUTION: This electric power storage device has the storage battery 4 or a temperature detector 7 for measuring its surrounding temperature, and a storage battery monitoring device 8 for determining the service life progress degree of the storage battery 4 by the sum total of respective values provided by calculating the storage battery expected service life ratio of the respective temperature divisions T1, T2, T3, etc. to cumulative times t1, t2, t3, etc. with every temperature division, by measuring the cumulative times t1, t2, t3, etc. with every temperature division T1, T2, T3, etc. covered by the storage battery 4, by setting a temperature division of dividing the temperature measured by the temperature detector 7 with every predetermined temperature; and notifies the service life progress degree of the storage battery 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator power storage device having a function of predicting and informing the life progress of an elevator storage battery.

  Patent Document 1 showing a conventional technique discloses a device for diagnosing a deterioration state of a storage battery from a relationship between a discharge electricity amount of the storage battery and a storage battery output voltage in a rescue operation apparatus during a power failure of an elevator. Further, there is disclosed an apparatus that observes the temperature of a storage battery, adds temperature correction to the deterioration diagnosis, determines the life of the storage battery, and displays the determination result.

JP-A-11-199152

  Patent Document 1 diagnoses a deterioration state of a storage battery by discharging the storage battery with a predetermined load and observing a terminal voltage of the storage battery. Therefore, if this check operation is not performed regularly, there is a possibility that the rescue operation cannot be performed if a power failure occurs. The storage battery uses a chemical reaction, and it is considered that the deterioration suddenly progresses at a certain time depending on the installation environment such as temperature. Further, although it is described that temperature correction is added, the temperature changes every day, and it is not certain how to correct the change.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a highly reliable elevator power storage device by accurately predicting and informing the progress of life of a storage battery. .

  A power storage device for an elevator according to the present invention includes a storage battery charging / discharging circuit connected to an elevator driving circuit, a storage battery charged by the charging / discharging circuit, and operating as a power source during power supply to the elevator or during a power failure. In the elevator power storage device, a temperature detector that measures the temperature of the storage battery or its surroundings, a temperature section that divides the temperature measured by the temperature detector in predetermined temperature increments, and the temperature that the storage battery has suffered The cumulative time (t1, t2, t3, ---) for each section (T1, T2, T3, ----) is measured, and the cumulative time (t1, t2, t3, ----) for each temperature section is measured. And a storage battery monitoring device for obtaining the life progress of the storage battery from the sum of the values obtained by calculating the storage battery expected life ratio of each of the temperature categories (T1, T2, T3, ---), Degree of progress In which it was to be broadcast.

  In addition, a storage battery charging / discharging circuit connected to an elevator driving circuit, and an electric power storage device for an elevator equipped with a storage battery that is charged by the charging / discharging circuit and operates as a power source in the event of a power failure, current detection for measuring the charging current of the storage battery A temperature detector that measures the temperature of the storage battery or its surroundings, a temperature segment that divides the temperature measured by the temperature detector in predetermined temperature increments, and the temperature segment (T1, T2, The cumulative time (t1, t2, t3, ---) for each T3, ---) is measured, and each of the temperature segments (t1, t2, t3, ---) T1, T2, T3, ----) is provided with a storage battery monitoring device that calculates the life progress of the storage battery from the sum of the values obtained by calculating the storage battery expected life ratio, and informs the life progress of the storage battery. The storage battery Whether the storage battery is determined to be abnormal and the charging operation of the storage battery charging / discharging circuit is stopped when the charging current after completion of charging is observed with the current detector and the charging current rises to a predetermined value or more. Alternatively, the charging output voltage of the storage battery charging / discharging circuit is lowered to suppress the charging current of the storage battery.

  According to the power storage device for an elevator of the present invention, a temperature detector for measuring the temperature of the storage battery or its surroundings, and a temperature section in which the temperature measured by the temperature detector is divided in predetermined temperature increments, and the storage battery is covered. The cumulative time (t1, t2, t3, ---) for each temperature segment (T1, T2, T3, ---) is measured, and the cumulative time (t1, t2, t3, ---) for each temperature segment is measured. -) Is provided with a storage battery monitoring device for obtaining the life progress of the storage battery from the sum of the values obtained by calculating the storage battery expected life ratio of each temperature category (T1, T2, T3, ---), Since the life progress of the storage battery is reported, the life progress of the storage battery can be accurately predicted in an installation environment different for each elevator, and a highly reliable elevator power storage device can be realized.

  In addition, a current detector that measures the charging current of the storage battery, a temperature detector that measures the temperature of the storage battery or its surroundings, and a temperature section that divides the temperature measured by the temperature detector in predetermined temperature increments, the storage battery The accumulated time (t1, t2, t3, ---) for each of the temperature segments (T1, T2, T3, ---) covered by is measured, and the accumulated time (t1, t2, t3, for each temperature segment) is measured. ---) is equipped with a storage battery monitoring device that calculates the life progress of the storage battery from the sum of the values obtained by calculating the storage battery expected life ratio of each temperature category (T1, T2, T3, ----) In addition to notifying the progress of life of the storage battery, the charging current after the storage battery is fully charged is observed with the current detector, and when the charging current rises above a predetermined value, Determine and stop the charging operation of the storage battery charging / discharging circuit Alternatively, since the charging output voltage of the storage battery charging / discharging circuit is lowered to suppress the charging current of the storage battery, the life prediction of the storage battery can be accurately predicted in different installation environments for each elevator. A high elevator power storage device can be realized. Further, by observing the charging current of the storage battery, the abnormal state of the storage battery can be detected with high accuracy.

Embodiment 1 FIG.
1 is a block diagram showing an elevator control apparatus having an elevator power storage apparatus according to Embodiment 1 of the present invention. In the figure, a commercial power source 1 is a power source for an elevator during normal times. The elevator drive circuit 2 adjusts and controls the electric power supplied from the power source to the electric power of variable voltage and variable frequency, and supplies the electric power to the elevator driving motor 3. The storage battery 4 temporarily stores the power from the power source 1 or the regenerative power of the elevator during normal times, and is used as a power source in the event of a power failure. The storage battery charging / discharging circuit 5 is connected to the elevator drive circuit 2 to charge the storage battery 4 with DC power, and supplies the DC power of the storage battery 4 to the elevator drive circuit 2 during a power failure or power running operation.

  The voltage detection circuit 6 detects the terminal voltage of the storage battery 4. The temperature detector 7 detects the temperature (surface temperature) of the storage battery or the surrounding temperature. The storage battery monitoring device 8 takes in the output of the voltage detection circuit 6 and the output of the temperature detector 7, monitors the state of the storage battery 4, and displays the result. The elevator control device controls the operation of the elevator and receives the output result of the storage battery monitoring device 8 to control the storage battery charge / discharge circuit 5 and the elevator drive circuit 2.

  Next, the operation will be described. In elevator control, recently, from the viewpoint of energy saving, the regenerative power is temporarily stored in the power storage device, and the stored power is released when the power consumption is large, and the power consumption is leveled. . On the other hand, there is a conventional device that stores power in a power storage device so that a rescue operation can be performed when a power failure occurs. As the storage battery in this case, an inexpensive lead storage battery is generally used from the viewpoint of economic merit.

  The life of the lead storage battery will be described. FIG. 3 is a characteristic diagram showing the relationship between the temperature (° C.) and the expected life (years) of the lead storage battery. Here, two curves indicate the upper limit value and the lower limit value of the expected life. For example, if the battery temperature is always 25 ° C. or lower, it indicates the expected life of 3 years for the lower limit and 5 years for the upper limit, and shows the relationship that the expected life becomes shorter as the temperature rises. Yes.

  The life determination of the storage battery will be described. FIG. 2 is a block diagram showing a storage battery monitoring device. The storage battery monitoring device 8 includes a control CPU 81, a clock 82, a ROM 83 for storing a program for the battery monitoring device 8, a RAM 84 for storing data, a display 85, an interface 80, and an input / output terminal 86. ing. The storage battery monitoring device 8 sets temperature divisions (T1, T2, T3, ---) in which the temperature of the storage battery 4 measured by the temperature detector 7 is divided at predetermined temperature (eg, 5 ° C.) increments, and is stored in the RAM 84. is doing. The storage battery monitoring device 8 measures the temperature of the storage battery 4 that changes every day as the accumulated time (t1, t2, t3, ---) for each of the temperature segments, and accumulates it in the RAM 84. FIG. 4 is a diagram showing the accumulated time (t1, t2, t3, --- time) for each temperature category (° C.) of the storage battery 4.

  For example, 0-5 ° C is T1 section, 6-10 ° C is T2 section, 11-15 ° C is T3 section, 16-20 ° C is T4 section, 21-25 ° C is T5 section, 26-30 ° C is T6 section, 31-35 ° C is T7, 36-40 ° C is T8, 41-45 ° C is T9, 46-50 ° C is T10, 51-55 ° C is T11, and 56-60 ° C is T12. FIG. 4 shows that the accumulated time when the target storage battery 4 was in each temperature section T1 to T12 from the start of measurement was t1 to t12 hours at a certain time, respectively. At this time, the life progression degree can be calculated by the following equation.

  In the above equation, the expected life in the storage battery temperature Ti section is focused on the lower limit value as the expected life in FIG. 3, for example, in the temperature section T6 (26 to 30 ° C.), the expected life of the temperature center value 27.5 ° C. 2.4 years have been adopted. Similarly, the expected life (year) for each temperature category (T1, T2, T3, ---) adopted is stored in the ROM 83 of the storage battery monitoring device 8. The predicted life progression degree of the storage battery 4 is calculated by using, for example, the free time of the CPU 81 of the storage battery monitoring device 8 based on the above formula, and this is displayed on the display unit 85 for notification. . For example, when the predicted life progression degree exceeds 1, it is determined as a life, and this is displayed as a warning or a warning. When it determines with a lifetime, the storage battery monitoring apparatus 8 transmits a determination result to the elevator control apparatus 9, and warns abnormality to a maintenance company (maintenance man) or a building owner.

  In the above description, the example of the temperature increment of 5 ° C. has been described, but the life progress degree can be predicted with higher accuracy by making the temperature increment smaller. In addition, various margins can be selected by selecting the expected life for each temperature category. The lead storage battery has been described, but the storage battery is not limited to the lead storage battery as long as the same technical idea can be applied (with a temperature-life curve). Furthermore, the technical concept of the life progress prediction of the present invention can be applied to a storage battery that operates as a power source in the event of a power failure, or a storage battery that stores regenerative power and supplies power to an elevator. It is.

  In the above equation, the estimated life progression degree of the storage battery is the accumulated time (t1, t2, t3, ---) for each temperature category (T1, T2, T3, ---) that the storage battery 4 suffered from the start of measurement. -) Is measured, and the expected life ratio of each temperature segment (T1, T2, T3, ---) is calculated (multiplication or division) in the accumulated time (t1, t2, t3, ---) for each temperature segment And output each value [t1 / (3 × 365 × 24), t2 / (3 × 365 × 24), ---, t7 / (1.8 × 365 × 24), --- ] Is calculated from the sum of Needless to say, the multiplication of the expected life ratio and the division of the reciprocal of the expected life ratio are equivalent.

  The predicted life progression degree of the storage battery obtained by the storage battery monitoring device 8 is displayed on the display 85 of the storage battery monitoring device 8 so that it can be observed, and the life progression degree of the storage battery is 1 or a predetermined value set appropriately. When it reaches, the determination result is transmitted to the elevator control device 9, and a warning is given to the maintenance company (maintenance man) or the building owner. By comprising in this way, the lifetime prediction of a storage battery can be accurately estimated in the installation environment different for every elevator, and the reliable electric power storage apparatus of an elevator is realizable. In addition, in the present invention, replacement can be realized at an appropriate replacement time according to the installation environment with respect to a periodic replacement cycle that is set short with a sufficient margin for preventive maintenance. Therefore, life cycle cost can be suppressed.

Embodiment 2. FIG.
In the configuration of FIG. 1, if the installation environment of the elevator is in the standard environment and the heat dissipation of the storage battery 4 is appropriately realized, the temperature of the storage battery 4 measured by the temperature detector 7 is within an assumed temperature change. There should be. In particular, in a state where trickle charging is performed at an appropriate constant voltage, since the self-heating is small, the temperature should be stable. Therefore, in the second embodiment, when the temperature of the storage battery 4 rises to a predetermined temperature (for example, 70 ° C.) or higher, the storage battery monitoring device 8 determines that the storage battery 4 is abnormal and displays this on the display for notification. To do. If necessary, the storage battery monitoring device 8 transmits an abnormality determination result to the elevator control device 9 to warn the maintenance company (maintenance man) and the building owner of the abnormality.

  When it is determined that the storage battery 4 is abnormal, the operation of the storage battery charging / discharging circuit 5 is stopped by the output signal of the storage battery monitoring device 8 or the output voltage thereof is lowered to become a source of abnormal heat generation of the storage battery 4. Control to suppress the charging current. By the above control, it is possible to suppress the deterioration of the storage battery 4 due to the heat escape state. In addition, by notifying the abnormality determination result, it is possible to prevent abnormal overheating or the like when the storage battery 4 deteriorates and leads to a short circuit accident, and to detect a dangerous state due to continued use of the abnormal storage battery 4 at an early stage. Can be prevented.

Embodiment 3 FIG.
FIG. 5 is a block diagram showing an elevator control apparatus having an elevator power storage apparatus according to the third embodiment. The same or corresponding parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. In contrast to the first embodiment, a current detector 10 for detecting the charging current of the storage battery 4 is provided, and the measured current output is input to the storage battery monitoring device 8.

  The elevator storage battery 4 may be of a type that is used for standby use that is used as a power source only in the event of an emergency such as a power failure. In this case, it is necessary to always keep the state of charge by trickle charge or flow charge in preparation for emergency use. Usually, while the elevator is operating with the commercial power source 1, the storage battery 4 is kept in a required amount of charge by the operation of the storage battery charging / discharging circuit 5.

  The storage battery charging / discharging circuit 5 is recommended to be a constant voltage charging method with a limited charging current. FIG. 6 is a characteristic diagram showing charging characteristics of the lead storage battery. FIG. 6 shows the charging characteristics of the charging / discharging circuit in which the current value is limited to 0.25 CA and the voltage is constant at 2.275 V / cell (where C of the unit CA is the numerical value of the rated capacity of the storage battery, A (For example, in the case of a storage battery of C = 7 Ah ampere hour, 0.25CA = 0.25 × 7A = 1.75 A). Here, after 10 hours have elapsed, the storage battery 4 is fully charged (full charge), and only the trickle current that compensates for the self-discharge flows into the storage battery 4. If the storage battery 4 is in a normal state, the trickle current will maintain a stable current value. However, if the ambient temperature becomes high, a thermal run-off phenomenon will occur and the trickle current may increase. is there. Further, when the deteriorated storage battery 4 is continuously used, an internal short circuit of the storage battery 4 may occur, and the trickle current may increase.

  In the third embodiment, an increase phenomenon of trickle current after the storage battery 4 is fully charged (full charge) is observed, and the trickle current increases beyond a predetermined value (for example, 10 times the normal trickle current). In this case, for example, when this continues for a predetermined time (for example, 1 hour) or longer, the storage battery 4 is determined to be in an abnormal state, and this is displayed on the display for notification. If necessary, the storage battery monitoring device 8 transmits an abnormality determination result to the elevator control device 9 to warn the maintenance company (maintenance man) and the building owner of the abnormality.

  When it is determined that the storage battery 4 is abnormal, the charging operation of the storage battery charging / discharging circuit 5 is stopped by the output signal of the storage battery monitoring device 8 or the charge output voltage thereof is lowered to cause abnormal storage of the storage battery 4 The charging current is controlled to be suppressed. By the above control, it is possible to suppress the deterioration of the storage battery 4 due to the heat escape state. In addition, by notifying the abnormality determination result, it is possible to prevent abnormal overheating or the like when the storage battery 4 deteriorates and leads to a short circuit accident, and to detect a dangerous state due to continued use of the abnormal storage battery 4 at an early stage. Can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator control apparatus which has the electric power storage apparatus of the elevator which is Embodiment 1 of this invention. It is a block diagram which shows the storage battery monitoring apparatus of FIG. It is a characteristic view which shows the relationship between the temperature (degreeC) of lead acid battery, and an expected lifetime (year). It is a figure which shows the accumulation time (hour) for every temperature division (degreeC) of a storage battery. FIG. 5 is a configuration diagram illustrating an elevator control device having an elevator power storage device according to a third embodiment. It is a characteristic view which shows the charge characteristic of the charging / discharging circuit of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Commercial power source 2 Elevator drive circuit 3 Elevator drive motor 4 Storage battery 5 Storage battery charge / discharge circuit 6 Voltage detection circuit 7 Temperature detector 8 Storage battery monitoring device 9 Elevator control device 10
80 interface 81 CPU for control
82 Clock 83 ROM
84 RAM 85 Display 86 Input / output terminal

Claims (4)

  A storage battery charging / discharging circuit connected to an elevator drive circuit, an elevator power storage device comprising a storage battery that is charged by the charging / discharging circuit and operates as a power source in the event of power supply to the elevator or during a power failure. A temperature detector for measuring the surrounding temperature, a temperature section in which the temperature measured by the temperature detector is divided in predetermined temperature increments, and the temperature section (T1, T2, T3, -----) covered by the storage battery is set. ) For each of the temperature segments (T1, T2, T3, T3, T3, T3). , ---) Elevator power provided with a storage battery monitoring device that calculates the life progress of the storage battery from the sum of the values obtained by calculating the storage battery expected life ratio of the storage battery, and reporting the life progress of the storage battery Accumulator   The power storage device for an elevator according to claim 1, wherein the storage battery monitoring device notifies the storage battery when the storage battery is determined to have a life based on the obtained life progress degree of the storage battery.   When the temperature measured by the temperature detector exceeds a predetermined temperature, the storage battery is determined to be abnormal and the operation of the storage battery charge / discharge circuit is stopped or the output voltage of the storage battery charge / discharge circuit is lowered, The elevator power storage device according to claim 1, wherein a charging current of the storage battery is suppressed.   A storage battery charging / discharging circuit connected to an elevator driving circuit, an electric power storage device for an elevator equipped with a storage battery that is charged by the charging / discharging circuit and operates as a power source in the event of a power failure, a current detector that measures the charging current of the storage battery, A temperature detector for measuring the temperature of the storage battery or its surroundings, a temperature section in which the temperature measured by the temperature detector is divided in predetermined temperature increments, and the temperature section (T1, T2, T3, and the like covered by the storage battery) ---) The accumulated time (t1, t2, t3, ---) for each temperature segment is measured, and each of the temperature segments (T1, T2, t3, ---) is measured for the accumulated time (t1, t2, t3, ---) for each temperature segment. (T2, T3, ----) provided with a storage battery monitoring device for determining the life progress of the storage battery from the sum of the values obtained by calculating the storage battery expected life ratio, and notifying the life progress of the storage battery, The storage battery is fully charged The charging current after being observed is observed with the current detector, and when the charging current rises above a predetermined value, it is determined that the storage battery is abnormal, and the charging operation of the storage battery charging / discharging circuit is stopped or the above A power storage device for an elevator, wherein the charging output voltage of the storage battery charging / discharging circuit is lowered to suppress the charging current of the storage battery.

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