Elevator control system

Abstract

The objective is to obtain an elevator control device that can more accurately diagnose the lifespan of the target battery. [Solution] In the elevator control device 30, the diagnostic operation command unit 33 performs a diagnostic operation upon receiving a diagnostic operation command. The discharge voltage acquisition unit 34 acquires multiple discharge voltage values ​​of the target battery during the diagnostic operation. The characteristic estimation unit 36 ​​estimates the discharge voltage characteristics of the target battery by comparing the multiple discharge voltage values ​​acquired by the discharge voltage acquisition unit 34 with multiple comparison data. The diagnostic unit 37 diagnoses the lifespan of the target battery based on the discharge voltage characteristics of the target battery.

Description

Technical Field

[0001] The present disclosure relates to an elevator control device.

Background Art

[0002] In a conventional elevator system, a battery is provided for performing a rescue operation for passengers in the car when a commercial power supply fails. And in a conventional elevator control device, for the purpose of diagnosing the life of the battery, a rescue operation is carried out according to the instructions of a maintenance worker, and the life of the battery is predicted based on the voltage drop characteristics of the battery during the rescue operation.

[0003] Specifically, the voltage drop characteristics of the battery during the rescue operation period from the start time to the end time of the rescue operation by the power running operation are measured, and the voltage drop rate is calculated. Then, the life is predicted by comparing the calculated voltage drop rate with the voltage drop rate of a new battery calculated in the same manner (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004] <​​​​​​​​​​​​​​​​​​​​

[0007] The elevator control device according to this disclosure includes: a diagnostic operation command unit that, upon receiving a diagnostic operation command, switches the power supply source to the hoisting machine from commercial power to the target battery, which is the battery to be diagnosed, and performs a diagnostic operation to run the elevator car; a discharge voltage acquisition unit that acquires multiple discharge voltage values ​​of the target battery during the diagnostic operation; a data storage unit that stores multiple comparison data, which are data of multiple different discharge voltage characteristics; a characteristic estimation unit that estimates the discharge voltage characteristics of the target battery by comparing the multiple discharge voltage values ​​acquired by the discharge voltage acquisition unit with the multiple comparison data; and a diagnostic unit that diagnoses the lifespan of the target battery based on the discharge voltage characteristics of the target battery estimated by the characteristic estimation unit. [Effects of the Invention]

[0008] According to the elevator control device of this disclosure, the lifespan of the target battery can be diagnosed more accurately. [Brief explanation of the drawing]

[0009] [Figure 1] This is a configuration diagram showing an elevator system according to Embodiment 1. [Figure 2] Figure 1 is a block diagram showing the elevator control device. [Figure 3] This graph shows the first example of comparison data stored in the data storage unit of Figure 2. [Figure 4] This graph shows a second example of the comparison data stored in the data storage unit of Figure 2. [Figure 5] This graph shows a third example of the comparison data stored in the data storage unit of Figure 2. [Figure 6] This graph shows an example of the discharge voltage characteristics of the battery shown in Figure 1, as estimated by the characteristic estimation unit in Figure 2. [Figure 7] Figure 2 is an explanatory diagram showing an example of how to determine the battery life formula in the life calculation unit. [Figure 8]Figure 2 is a flowchart showing the battery diagnostic process performed by the diagnostic operation control unit. [Figure 9] This is a configuration diagram showing a first example of a processing circuit that realizes each function of the elevator control device of Embodiment 1. [Figure 10] This is a configuration diagram showing a second example of a processing circuit that realizes each function of the elevator control device of Embodiment 1. [Modes for carrying out the invention]

[0010] The embodiments will be described below with reference to the drawings. Embodiment 1. Figure 1 is a diagram showing the configuration of an elevator system according to Embodiment 1. In the figure, the hoisting machine 11 includes a drive sheave 12, a hoisting machine motor 13, and a hoisting machine brake (not shown).

[0011] The hoisting motor 13 rotates the drive sheave 12. The hoisting brake maintains the drive sheave 12 in a stationary state. The hoisting brake also slows the rotation of the drive sheave 12.

[0012] A suspension system 14 is wrapped around the drive sheave 12. The suspension system 14 can consist of multiple ropes or multiple belts.

[0013] The elevator car 15 and the counterweight 16 are suspended within the hoistway by the suspension system 14. The elevator car 15 and the counterweight 16 move up and down within the hoistway by rotating the drive sheave 12.

[0014] The hoisting machine 11 is supplied with power from the commercial power supply 20 via a converter 21 and an inverter 22. The AC power from the commercial power supply 20 is converted to DC power by the converter 21. The DC power from the converter 21 is converted to AC power of a set frequency by the inverter 22.

[0015] The operation of the car 15 is controlled by the elevator control device 30. That is, the elevator control device 30 controls the operation of the car 15 by controlling the hoist 11. Specifically, the elevator control device 30 controls the hoist motor 13 by controlling the inverter 22. Also, the elevator control device 30 controls the hoist brake.

[0016] Power from the commercial power supply 20 is supplied to the elevator control device 30 via the charging circuit 23 and the battery 24. The charging circuit 23 charges the battery 24 with the power from the commercial power supply 20.

[0017] A main circuit breaker 25 is provided between the commercial power supply 20 and the converter 21. A normally closed switch 26 is provided between the charging circuit 23 and the battery 24. A normally open switch 27 is provided between the battery 24 and the inverter 22.

[0018] The opening and closing of the main circuit breaker 25, the opening and closing of the normally closed switch 26, and the opening and closing of the normally open switch 27 are controlled by the elevator control device 30.

[0019] During normal operation, the elevator control device 30 supplies power from the commercial power supply 20 to the hoist 11 by closing the main circuit breaker 25. Also, during normal operation, the normally closed switch 26 is closed and the normally open switch 27 is open.

[0020] During a power outage of the commercial power supply 20 and during diagnostic operation, the elevator control device 30 opens the main circuit breaker 25 and the normally closed switch 26, and closes the normally open switch 27. Thereby, the power supplied to the hoist 11 via the inverter 22 is switched from the power of the commercial power supply 20 to the power of the battery 24.

[0021] The diagnostic operation involves switching the power supply source to the hoisting machine 11 from commercial power 20 to the target battery, running the elevator car 15 to a designated floor, and diagnosing the lifespan of the target battery. The target battery is the battery to be diagnosed. In this example, battery 24 is the target battery.

[0022] Diagnostic operation is initiated when a diagnostic start command is input to the elevator control device 30. The diagnostic start command is transmitted to the elevator control device 30 at any time by a maintenance worker operating the command input device 51. Diagnostic operation is performed, for example, during periodic inspections.

[0023] After the diagnostic operation is complete, the elevator control device 30 closes the main circuit breaker 25 and the normally closed switch 26, and opens the normally open switch 27.

[0024] Figure 2 is a block diagram of the elevator control device 30 shown in Figure 1. The elevator control device 30 has, as functional blocks, an operation control unit 31 and a diagnostic operation control unit 32. The operation control unit 31 controls the operation of the elevator car 15 during normal operation.

[0025] The diagnostic operation control unit 32 includes a diagnostic operation command unit 33, a discharge voltage acquisition unit 34, a data storage unit 35, a characteristic estimation unit 36, a diagnostic unit 37, and a diagnostic result transmission unit 38.

[0026] The diagnostic operation command unit 33 receives a diagnostic start command from the command input device 51. The diagnostic operation command unit 33 includes a commercial power cut-off unit 41, a power switching unit 42, a start command unit 43, and a current control unit 44.

[0027] When a diagnostic start command is received, the commercial power interruption unit 41 opens the main circuit breaker 25, interrupting the power supply from the commercial power source 20 to the hoisting machine 11. When a diagnostic start command is received, the power switching unit 42 opens the normally closed switch 26 and closes the normally open switch 27.

[0028] The start command unit 43 initiates diagnostic operation when the power supply source to the hoisting machine 11 is switched to the battery 24. During the diagnostic operation, the current control unit 44 controls the supply current of the AC power supplied from the battery 24 via the inverter 22.

[0029] The discharge voltage acquisition unit 34 acquires multiple discharge voltage values ​​of the battery 24 during diagnostic operation. The discharge voltage acquisition unit 34 also acquires and stores the voltage value at the start of the diagnostic operation, the highest voltage value during the diagnostic operation, and the lowest voltage value during the diagnostic operation as multiple discharge voltage values.

[0030] The data storage unit 35 stores and stores multiple comparison data, which are data on different discharge voltage characteristics of batteries of the same type as the battery 24.

[0031] The characteristic estimation unit 36 ​​estimates the discharge voltage characteristics of the battery 24 by comparing multiple discharge voltage values ​​acquired by the discharge voltage acquisition unit 34 with multiple comparison data stored in the data storage unit 35.

[0032] Specifically, the characteristic estimation unit 36 ​​selects comparison data from multiple comparison data stored in the data storage unit 35 that are consistent with the discharge voltage value acquired by the discharge voltage acquisition unit 34, taking into account at least one of the temperature conditions and the amount of change from the most recent data, to determine the discharge voltage characteristics of the battery 24. Examples of temperature conditions include absolute temperature, ambient temperature in the region, and elevator shaft temperature rise. The absolute temperature is the operating environment temperature + 273.5°C.

[0033] The diagnostic unit 37 diagnoses the lifespan of the battery 24 based on the discharge voltage characteristics of the battery 24 estimated by the characteristic estimation unit 36.

[0034] Here, Figure 3 is a graph showing the first example of comparison data stored in the data storage unit 35 of Figure 2. Figure 4 is a graph showing the second example of comparison data stored in the data storage unit 35 of Figure 2. Figure 4 is a graph showing the third example of comparison data stored in the data storage unit 35 of Figure 2. The degradation rates differ between the first, second, and third examples.

[0035] Figure 6 is a graph showing an example of the discharge voltage characteristics of the battery 24 in Figure 1, estimated by the characteristic estimation unit 36 ​​in Figure 2.

[0036] In Figures 3, 4, 5, and 6, V0 represents the voltage value at the start of the diagnostic operation. Point V1 represents the highest voltage value during the diagnostic operation. V2 represents the lowest voltage value during the diagnostic operation.

[0037] The characteristic estimation unit 36 ​​selects comparison data that aligns with V0, V1, and V2, and preferably comparison data in which V0, V1, and V2 match, to determine the discharge voltage characteristics of the battery 24.

[0038] The data storage unit 35 may generate and aggregate multiple comparison data sets using a comparison data generation model. The comparison data generation model is a trained model generated by machine learning using artificial intelligence. The machine learning is supervised learning that takes the measurement results of V0, V1, and V2 as input and outputs a curve showing the discharge voltage characteristics. In this case, data of discharge voltage values ​​obtained by diagnostic operation can also be fed back to the data storage unit 35 for additional learning.

[0039] The diagnostic unit 37 includes a remaining capacity calculation unit 45, a lifespan calculation unit 46, and an ambient temperature calculation unit 47.

[0040] The remaining capacity calculation unit 45 calculates the remaining capacity of the battery 24 based on the discharge voltage characteristics of the battery 24. The remaining capacity can be expressed by the following formula.

[0041] Remaining capacity Q1 = Diagnostic operating current × Battery operating time

[0042] The remaining capacity calculation unit 45 of Embodiment 1 determines the remaining capacity of the battery 24 based on the capacity of the battery 24 required for rescue operation and the discharge voltage characteristics of the battery 24 estimated by the characteristic estimation unit 36. Rescue operation is an operation in which the elevator car 15 is driven to a designated floor by power supplied from the battery 24 when the commercial power supply 20 is interrupted. The designated floor in rescue operation is, for example, the nearest floor.

[0043] Specifically, as shown in Figure 6, the remaining capacity calculation unit 45 determines the current remaining capacity of the battery 24, i.e., the capacity retention rate, by displaying the discharge voltage characteristics of the battery 24 and the degradation threshold of the battery 24 on the same graph. The degradation threshold of the battery 24 is the minimum capacity of the battery 24 required to satisfy the function of rescue operation.

[0044] The lifespan calculation unit 46 determines a battery life formula for the battery 24 based on the change in the remaining capacity of the battery 24 in relation to the operating time of the battery 24. The lifespan calculation unit 46 also uses the battery life formula to determine whether the battery 24 needs to be replaced and to calculate the remaining lifespan of the battery 24.

[0045] Figure 7 is an explanatory diagram illustrating an example of how the battery life formula is determined in the life calculation unit 46 of Figure 2. The multiple plots in the graph of Figure 7 each represent the relationship between the remaining capacity calculated by the remaining capacity calculation unit 45 and the operating time. The life calculation unit 46 approximates a life curve from the multiple plots and calculates the battery life formula based on the life curve. It is known that the battery life formula can be expressed using the Arrhenius equation.

[0046] Furthermore, the formula for representing the remaining capacity of the battery is shown below. In the following formula, Q is the remaining capacity in the general formula. A and B are constants representing the degradation rate, respectively. T is the absolute temperature, which is 273.5 + Celsius. Np is the operating time of battery 24 from the time it was installed until the present.

[0047]

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[0048] The life calculation unit 46 determines constants A and B by approximating with the Arrhenius equation and derives a battery life formula. Then, by displaying the battery life formula and the life threshold representing the usage limit of the battery 24 on the same graph, the life calculation unit 46 determines whether the battery 24 needs to be replaced based on the remaining capacity of the currently used battery 24 and calculates the remaining life of the battery 24. The remaining life is the operating time from the current value of the remaining capacity to the end of the life.

[0049] The ambient temperature calculation unit 47 calculates the operating ambient temperature of the battery 24 by transforming the battery life formula into the following formula, which uses the remaining capacity and operating time as variables to determine the temperature. The operating ambient temperature calculated by the ambient temperature calculation unit 47 is part of the diagnostic results from the diagnostic unit 37.

[0050] T = -B / ln((1-Q)) 2 ×Np / A)

[0051] The diagnostic result transmission unit 38 transmits the diagnostic results of the battery 24 performed by the diagnostic unit 37 to at least one of the maintenance center 52 and the external database 53.

[0052] Figure 8 is a flowchart showing the battery diagnostic process performed by the diagnostic operation control unit 32 in Figure 2. The diagnostic operation control unit 32 starts the battery diagnostic process upon receiving a diagnostic start command. Once the battery diagnostic process has started, in step S101, the diagnostic operation control unit 32 switches the power supply source to the hoisting machine 11 from the commercial power supply 20 to the battery 24.

[0053] Next, in step S102, the diagnostic operation control unit 32 starts the diagnostic operation. Once the diagnostic operation has started, in step S103, the diagnostic operation control unit 32 detects the discharge voltage of the battery 24 and in step S104 confirms whether the diagnostic operation has finished.

[0054] When the diagnostic operation is completed, the diagnostic operation control unit 32 acquires and stores the voltage value at the start of the diagnostic operation, the highest voltage value during the diagnostic operation, and the lowest voltage value during the diagnostic operation in step S105.

[0055] Next, in step S106, the diagnostic operation control unit 32 estimates the discharge voltage characteristics of the battery 24. Subsequently, in step S107, the diagnostic operation control unit 32 calculates the remaining capacity of the battery 24 based on the discharge voltage characteristics of the battery 24.

[0056] Next, in step S108, the diagnostic operation control unit 32 calculates the battery life formula. Then, in step S109, the diagnostic operation control unit 32 determines whether or not the battery 24 needs to be replaced and calculates the remaining life of the battery 24.

[0057] Next, in step S110, the diagnostic operation control unit 32 calculates the operating ambient temperature of the battery 24. Finally, in step S111, the diagnostic operation control unit 32 transmits the diagnostic result of the battery 24 to an external source and terminates the process.

[0058] In this elevator control device 30, multiple discharge voltage values ​​of the battery 24 are acquired during diagnostic operation, and the discharge voltage characteristics of the battery 24 are estimated by comparing the acquired multiple discharge voltage values ​​with multiple comparison data. Then, the lifespan of the battery 24 is diagnosed based on the estimated discharge voltage characteristics.

[0059] The multiple discharge voltage values ​​obtained through the diagnostic operation are characteristic values ​​of the battery 24 with the hoisting machine 11 connected as an actual load, and are highly reliable values. Therefore, by diagnosing the lifespan of the battery 24 based on the discharge voltage characteristics estimated from these discharge voltage values, the lifespan of the battery 24 can be diagnosed more accurately.

[0060] Furthermore, multiple discharge voltage values ​​are acquired, including the voltage value at the start of the diagnostic operation, the highest voltage value during the diagnostic operation, and the lowest voltage value during the diagnostic operation. This allows for a more accurate estimation of the discharge voltage characteristics of the battery 24, thereby improving the accuracy of the battery 24 lifespan diagnosis.

[0061] Furthermore, the characteristic estimation unit 36 ​​selects comparison data that corresponds to multiple discharge voltage values ​​from multiple comparison data stored in the data storage unit 35, taking into account at least one of the temperature conditions and the amount of change from the most recent data, to determine the discharge voltage characteristics of the battery 24. As a result, the discharge voltage characteristics of the battery 24 can be estimated more accurately, and the accuracy of diagnosing the lifespan of the battery 24 can be further improved.

[0062] Furthermore, the diagnostic unit 37 determines the remaining capacity of the battery 24 based on the battery capacity required for rescue operation and the discharge voltage characteristics of the battery 24. This allows for a more accurate diagnosis of the battery 24's lifespan.

[0063] Furthermore, the diagnostic unit 37 determines a battery life formula for the battery 24 based on the change in the remaining capacity of the battery 24 relative to the operating time of the battery 24, and uses the battery life formula to determine whether the battery 24 needs to be replaced, or to calculate the remaining life of the battery 24. As a result, the battery 24 can be replaced at a more appropriate time, and rescue operation during a power outage can be performed with sufficient power.

[0064] Furthermore, the diagnostic unit 37 calculates the ambient temperature of the battery 24 by transforming the battery life formula into a formula that determines temperature using remaining capacity and operating time as variables. Therefore, the ambient temperature of the battery 24 can be calculated without using sensors, temperature measuring instruments, etc., which are generally used to measure temperature. This also eliminates the need to install complex circuits for processing data.

[0065] Furthermore, by using the calculated operating temperature of the battery 24, the lifespan of temperature-sensitive components other than the battery 24 used in the elevator can be estimated more accurately. Examples of temperature-sensitive components include circuit boards, wire ropes, bearings, and resin parts. In addition, the lifespan of deteriorated components in other elevators installed at the same site can be estimated more accurately.

[0066] Furthermore, the diagnostic result transmission unit 38 transmits the diagnostic results from the diagnostic unit 37 to at least one of the maintenance center 52 and the external database 53. This allows for remote monitoring of the battery status 24. As a result, the diagnostic results of the battery 24 in operation can be grasped in a timely and accurate manner, preventing the timing of battery replacement from being missed.

[0067] The elevator control device 30 may be divided into two devices, with the operation control unit 31 and the diagnostic operation control unit 32 being provided in separate devices.

[0068] Furthermore, some of the functions of the diagnostic operation control unit 32, such as at least one of the data storage unit 35, characteristic estimation unit 36, and diagnostic unit 37, may be separated from the other functions and may be provided, for example, on a remotely located server.

[0069] Furthermore, each function of the elevator control device 30 in Embodiment 1 is realized by a processing circuit. Figure 9 is a configuration diagram showing a first example of a processing circuit that realizes each function of the elevator control device 30 in Embodiment 1. The processing circuit 100 in the first example is dedicated hardware.

[0070] Furthermore, the processing circuit 100 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. In addition, each function of the elevator control device 30 may be implemented by an individual processing circuit 100, or all functions may be implemented together by the processing circuit 100.

[0071] Figure 10 is a configuration diagram showing a second example of a processing circuit that realizes each function of the elevator control device 30 of Embodiment 1. The processing circuit 200 of the second example includes a processor 201 and a memory 202.

[0072] Processor 201 can include, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a microprocessor, a microcontroller, or a DSP (Digital Signal Processor).

[0073] In the processing circuit 200, each function of the elevator control device 30 is realized by software, firmware, or a combination of software and firmware. The software and firmware are written as programs and stored in memory 202. The processor 201 realizes each function by reading and executing the programs stored in memory 202.

[0074] The program stored in memory 202 can be said to cause the computer to execute the procedures or methods of each of the parts described above. Here, memory 202 refers to non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), and EEPROM (Electrically Erasable and Programmable Read Only Memory). Magnetic disks, flexible disks, optical disks, compact disks, minidiscs, DVDs, etc., also fall under the category of memory 202.

[0075] Furthermore, some of the functions of the above-mentioned parts may be implemented using dedicated hardware, while others may be implemented using software or firmware.

[0076] Thus, the processing circuit can realize the functions of each of the above-mentioned parts through hardware, software, firmware, or a combination thereof.

[0077] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0078] The various aspects of this disclosure are summarized below as an appendix.

[0079] (Note 1) Upon receiving a diagnostic operation command, the diagnostic operation command unit switches the power supply source to the hoisting machine from commercial power to the target battery, which is the battery to be diagnosed, and performs a diagnostic operation to move the cage. A discharge voltage acquisition unit that acquires multiple discharge voltage values ​​of the target battery during the diagnostic operation, A data storage unit that stores multiple comparison data, which are data of multiple different discharge voltage characteristics, A characteristic estimation unit estimates the discharge voltage characteristics of the target battery by comparing the plurality of discharge voltage values ​​obtained by the discharge voltage acquisition unit with the plurality of comparison data, A diagnostic unit diagnoses the lifespan of the target battery based on the discharge voltage characteristics of the target battery estimated by the characteristic estimation unit. An elevator control system equipped with the following features. (Note 2) The elevator control device according to Appendix 1, wherein the discharge voltage acquisition unit acquires the voltage value at the start of the diagnostic operation, the highest voltage value during the diagnostic operation, and the lowest voltage value during the diagnostic operation as the plurality of discharge voltage values. (Note 3) The elevator control device according to Appendix 1 or Appendix 2, wherein the characteristic estimation unit selects comparison data that corresponds to the plurality of discharge voltage values ​​acquired by the discharge voltage acquisition unit, based on at least one of the temperature conditions and the amount of change from the most recent data, from the plurality of comparison data stored in the data storage unit, and sets the discharge voltage characteristics of the target battery. (Note 4) The elevator control device according to any one of the appendices 1 to 3, wherein the diagnostic unit determines the remaining capacity of the target battery based on the capacity of the target battery necessary for rescue operation, which involves driving the car using power supplied from the target battery during a power outage, and the discharge voltage characteristics of the target battery. (Note 5) The elevator control device according to Appendix 4, wherein the diagnostic unit determines a battery life formula for the target battery from the change in the remaining capacity of the target battery with respect to the operating time of the target battery, and uses the battery life formula to perform at least one of the following: determining whether the target battery needs to be replaced, or calculating the remaining life of the target battery. (Note 6) The elevator control device described in Appendix 5 calculates the operating environment temperature of the target battery by transforming the battery life formula into a formula for determining the temperature with the remaining capacity and the operating time as variables. (Note 7) A diagnostic result transmission unit transmits the diagnostic results from the diagnostic unit to at least one of the maintenance center and an external database. An elevator control device as described in any one of the appendices 1 to 6, further comprising the features described herein. [Explanation of symbols]

[0080] 11 Hoisting machine, 15 Cage, 20 Commercial power supply, 24 Battery (target battery), 30 Elevator control device, 34 Discharge voltage acquisition unit, 35 Data storage unit, 36 Characteristic estimation unit, 37 Diagnostic unit, 38 Diagnostic result transmission unit, 52 Maintenance center, 53 External database.

Claims

1. Upon receiving a diagnostic operation command, the diagnostic operation command unit switches the power supply source to the hoisting machine from commercial power to the target battery, which is the battery to be diagnosed, and performs a diagnostic operation to move the cage. A discharge voltage acquisition unit that acquires multiple discharge voltage values ​​of the target battery during the diagnostic operation, A data storage unit that stores multiple comparison data, which are data of multiple different discharge voltage characteristics, A characteristic estimation unit estimates the discharge voltage characteristics of the target battery by comparing the plurality of discharge voltage values ​​obtained by the discharge voltage acquisition unit with the plurality of comparison data, A diagnostic unit diagnoses the lifespan of the target battery based on the discharge voltage characteristics of the target battery estimated by the characteristic estimation unit. An elevator control system equipped with the following features.

2. The elevator control device according to claim 1, wherein the discharge voltage acquisition unit acquires the voltage value at the start of the diagnostic operation, the highest voltage value during the diagnostic operation, and the lowest voltage value during the diagnostic operation as the plurality of discharge voltage values.

3. The elevator control device according to claim 1 or 2, wherein the characteristic estimation unit selects comparison data that corresponds to the plurality of discharge voltage values ​​acquired by the discharge voltage acquisition unit, based on at least one of the temperature conditions and the amount of change from the most recent data, from the plurality of comparison data stored in the data storage unit, and sets the discharge voltage characteristics of the target battery.

4. The elevator control device according to claim 1 or 2, wherein the diagnostic unit determines the battery operating time until the degradation threshold is reached, based on the degradation threshold which is the minimum capacity of the target battery required for rescue operation to move the car by power supply from the target battery in the event of a power outage, and the discharge voltage characteristics of the target battery, and determines the product of the battery operating time and the diagnostic operation current as the remaining capacity of the target battery during the diagnostic operation.

5. The elevator control device according to claim 4, wherein the diagnostic unit determines a battery life formula for the target battery from the change in the remaining capacity of the target battery with respect to the operating time of the target battery, and uses the battery life formula to perform at least one of the following: determining whether the target battery needs to be replaced, and calculating the remaining life of the target battery.

6. The elevator control device according to claim 5, wherein the diagnostic unit calculates the operating environment temperature of the target battery by transforming the battery life formula into a formula for determining temperature with the remaining capacity and the operating time as variables.

7. A diagnostic result transmission unit transmits the diagnostic results from the diagnostic unit to at least one of the maintenance center and an external database. The elevator control device according to claim 1 or claim 2, further comprising:

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