DETECTION METHOD, DETECTION DEVICE, AND COMPUTER PROGRAM

Abstract

To provide a method for detecting the state of a storage battery, a detection device, and a computer program.SOLUTION: A detection method detects the status of a plurality of storage batteries connected in series and / or parallel. The detection method acquires measurement data of the plurality of storage batteries. The detection method determines the presence or absence of an abnormality based on the measurement data for the storage batteries that are under floating charge at the time of the measurement of the measurement data.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a method, an apparatus, and a computer program for detecting the state of a storage battery. [Background technology]

[0002] For systems that use many storage batteries, there is a need to remotely monitor the status of each storage battery. In response to this need, a storage battery monitoring device has been developed that includes a sensor unit attached to each storage battery and a control unit that acquires data from the sensor unit (see Patent Document 1). In Patent Document 1, communication between the sensor unit and the control unit is achieved by wireless communication. The storage battery monitoring method using wireless communication in Patent Document 1 achieves remote monitoring while reducing the cost of laying a network.

[0003] The storage battery is used in combination with, for example, an uninterruptible power supply (UPS). Patent Document 2 discloses a large-scale uninterruptible power supply system using multiple UPS. In the uninterruptible power supply system of Patent Document 2, some of the UPS connected in parallel are suspended. The storage battery combined with the UPS is not charged or discharged while the UPS is suspended. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6690799 [Patent Document 2] Patent No. 5661576 Summary of the Invention [Problem to be solved by the invention]

[0005] When a storage battery is used in combination with a UPS, measurements including the voltage value of the storage battery may be performed during a period when charging is stopped.

[0006] The present invention aims to provide a method, a device, and a computer program for detecting the state of a storage battery. [Means for solving the problem]

[0007] A detection method for detecting the state of multiple storage batteries connected in series and / or parallel acquires measurement data for the multiple storage batteries, and determines whether or not there is an abnormality based on the measurement data for a storage battery that was undergoing float charging at the time the measurement data was measured. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a battery monitoring device. [Diagram 2] This is a schematic diagram of a battery panel connected to a UPS panel. [Diagram 3] FIG. 2 is a block diagram showing the configuration of a control unit. [Figure 4] 13 is a flowchart showing an example of a measurement processing procedure. [Diagram 5] 13 is a flowchart illustrating an example of an abnormality detection process procedure. [Figure 6] 13 is a flowchart illustrating an example of an abnormality detection process procedure according to the second embodiment. [Figure 7] FIG. 2 is a block diagram showing the configuration of a control unit. [Figure 8] 13 is a flowchart showing an example of a measurement processing procedure. [Figure 9] 13 is a flowchart illustrating an example of an abnormality detection process procedure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The detection method detects the state of a plurality of storage batteries connected in series and / or parallel, acquires measurement data of the plurality of storage batteries, and determines the presence or absence of an abnormality based on the measurement data for a storage battery that was in float charging when the measurement data was measured.

[0010] In this specification, the term "float charging" also includes the term "trickle charging."

[0011] The detection device detects the state of multiple storage batteries connected in series and / or parallel. The detection device includes multiple sensor units attached to the multiple storage batteries, and a control unit capable of wireless communication connection with the sensor units. The control unit requests the sensor units to measure data of the storage batteries and acquires the measurement data from the sensor units. The control unit determines the presence or absence of an abnormality based on the measurement data for a storage battery that was in float charging when the measurement data was measured. The computer program causes the computer to execute a process for acquiring measurement data of a plurality of storage batteries connected in series and / or parallel, and for determining the presence or absence of an abnormality based on the measurement data for a storage battery that was undergoing float charging when the measurement data was acquired.

[0012] With the above configuration, the presence or absence of an abnormality is determined based on data measured while the storage battery is floating-charging. During floating charging, the voltage value of a normal storage battery is sufficiently high, and the internal resistance is within a predetermined range. During floating charging, a storage battery whose voltage value drops can be determined to be abnormal. If the storage battery is in a state other than floating charging, during charging or discharging, data measured at that time, such as the voltage value, may erroneously determine that a normal storage battery is abnormal. Even if the storage battery is in a state other than floating charging, charging, or discharging, data measured at that time may erroneously determine that a normal storage battery is abnormal.

[0013] In the above configuration, an abnormality determination is performed based on the measurement data for a storage battery that was floating charged at the time of measurement, thereby making it possible to avoid erroneously determining that a normal storage battery is abnormal.

[0014] The control unit may further identify, for each of the plurality of storage batteries, whether it was in float charging or in another state when the measurement data was measured.

[0015] With the above configuration, the control unit can determine whether the storage battery was undergoing float charging when the measurement data is measured, and can subsequently determine whether there is an abnormality in the storage battery.

[0016] The control unit may acquire a total voltage value and a current value of the multiple storage batteries connected in series, and determine that float charging is in progress if the total voltage value is within a predetermined range and the current value is below a predetermined value when the measurement data is measured.

[0017] With the above configuration, it is possible to easily determine whether or not a storage battery was undergoing float charging when measurement data was measured for a plurality of storage batteries connected in series.

[0018] The control unit of the detection device may request measurement of the measurement data for each measurement unit that includes a predetermined number of batteries among the plurality of batteries, and identify the status of the predetermined number of batteries each time the measurement data is obtained.

[0019] The control unit does not necessarily have to cause the sensor unit to measure data for each of the multiple storage batteries and determine whether each battery was in float charging or in another state. The control unit may determine whether each battery was in float charging or not in units of two, three, or more storage batteries.

[0020] The control unit may store the measurement data and status data indicating whether or not the storage batteries were in float charging in association with identification information that individually identifies the storage batteries. After the measurement of the storage batteries is completed, the control unit may read out the measurement data and status data of the storage batteries individually, and determine the presence or absence of an abnormality based on the measurement data of the storage batteries that were in float charging when the measurement data was measured.

[0021] With the above configuration, in a system including a large number of storage batteries, such as several hundred or more, data measurement of those storage batteries can be completed in a short time. When performing measurement, identification of the state at the time of measurement, and abnormality determination based on the measurement data for each of the large number of storage batteries, the period from the timing of measurement of the first storage battery to the timing of measurement of the last storage battery is longer than when abnormality determination is performed after the fact. With the above configuration, abnormality determination is performed after the fact, and measurements can be completed collectively in a short time, so data of a large number of storage batteries can be measured under similar or similar conditions.

[0022] The present invention will be described in detail with reference to the drawings showing an embodiment of the present invention. In this embodiment, a lead-acid battery will be described as an example of a storage battery. The storage battery is not limited to a lead-acid battery, and may be a lithium-ion battery or other secondary battery.

[0023] (Embodiment 1) Fig. 1 shows an overview of a battery monitoring device. The battery monitoring device shown in Fig. 1 includes a plurality of sensor units 20 attached to a plurality of lead-acid batteries 1 connected in series and / or in parallel, respectively. The battery monitoring device includes a control unit 10 capable of wireless communication with the plurality of sensor units 20, and a measurement unit 30 that measures the total voltage value and current value of the plurality of lead-acid batteries 1 connected in series.

[0024] In the following description, a plurality of lead-acid batteries 1 connected in series will be referred to as a bank. A plurality of banks connected in parallel may be referred to as a domain.

[0025] The control unit 10, the multiple sensor units 20, and the measurement unit 30 are installed in a battery panel that houses multiple lead-acid batteries 1 to be monitored. FIG. 2 is a schematic diagram of a battery panel connected to a UPS panel. The battery panel houses multiple lead-acid batteries 1. The control unit 10 may be attached to the inside of an opening / closing cover of the battery panel. The multiple sensor units 20 (see FIG. 1) are installed on each of the multiple lead-acid batteries 1 arranged in the battery panel. The measurement unit 30 is installed in the battery panel together with the multiple lead-acid batteries 1.

[0026] Each bank including a plurality of lead-acid batteries 1 is connected to a contact between a rectifier (converter) of the UPS 5 and an inverter. The UPS 5 in this embodiment is stored in a UPS panel different from the battery panel. When the UPS 5 is operating, the lead-acid batteries 1 are basically in a floating charge state. When the power supply is interrupted, the UPS 5 discharges the lead-acid batteries 1 to the load, and after power is restored, the UPS 5 passes a charging current from the power supply to the lead-acid batteries 1. When the UPS 5 is in a pause state due to intermittent operation, the lead-acid batteries 1 are not charged or discharged. When the UPS 5 returns from a pause state, the lead-acid batteries 1 are charged with the amount of self-discharge of the lead-acid batteries 1 and the amount of power consumed by the sensor unit 20 from the lead-acid batteries 1.

[0027] The battery panel and the UPS panel may be integrated together. The UPS 5 may be housed in the battery panel together with the lead-acid batteries 1.

[0028] 3 is a block diagram showing the configuration of the control unit 10. The control unit 10 includes a processing unit 100, a storage unit 110, a display unit 40, an operation unit 42, a connection unit 50, a first communication unit 51, a second communication unit 52, and a third communication unit 53.

[0029] The processing unit 100 has a processor and controls each unit based on a control program 1P stored in the storage unit 110.

[0030] The storage unit 110 uses a non-volatile memory. The storage unit 110 stores a control program 1P in advance. The storage unit 110 stores measurement data and status data of the lead storage battery 1 acquired by the processing unit 100.

[0031] The display unit 40 is, for example, a liquid crystal panel. The operation unit 42 is a touch panel built into the liquid crystal panel. The operation unit 42 may include physical buttons.

[0032] The connection unit 50 is an interface for a signal line connected to the UPS 5. When the processing unit 100 detects an abnormality in the lead-acid battery 1 in a process described below, it outputs a signal indicating the abnormality in the lead-acid battery 1 to the UPS 5 via the connection unit 50.

[0033] The first communication unit 51 is a wireless communication module that realizes a wireless communication connection with the sensor unit 2. The control unit 10 is communicatively connected to the multiple sensor units 20 via the first communication unit 51. The first communication unit 51 realizes communication by, for example, BLE (Bluetooth Low Energy (registered trademark)).

[0034] The second communication unit 52 is a communication module for connecting to the customer's network shown in FIG. 1. The second communication unit 52 may be, for example, a network card compatible with a wired LAN. The second communication unit 52 enables communication connection with a network-connected computer (PC) or a tablet terminal. The second communication unit 52 may be a communication device compatible with wireless LAN or USB (Universal Serial Bus). The second communication unit 52 may be a device that enables communication with a maintenance technician's computer or tablet terminal without going through the customer's network.

[0035] The third communication unit 53 is a communication module that realizes a communication connection with the measuring unit 30. The third communication unit 53 uses a communication module that can guarantee immediacy in order to read the voltage value and current value measured by the measuring unit 30. The third communication unit 53 is, for example, a CAN (Control Area Network) communication module. The third communication unit 53 may be another communication module.

[0036] The measurement unit 30 includes a voltage detector 301. The measurement unit 30 measures the voltage between the positive terminal and the negative terminal of the bank by the voltage detector 301. The voltage between the positive terminal and the negative terminal of the bank is the total voltage of the series-connected lead-acid batteries 1 that constitute the bank.

[0037] The measurement unit 30 includes a current detector 302. The measurement unit 30 measures the current flowing through the bank by the current detector 302.

[0038] The measurement unit 30 outputs the measurement results to the control unit 10 by CAN communication. The communication used by the measurement unit 30 to output the measurement results of the control unit 10 is not limited to CAN. The measurement unit 30 may constantly output a signal at a signal level corresponding to the measurement result to the control unit 10.

[0039] The control unit 10 configured in this manner requests the sensor unit 2 to measure characteristic values ​​(states) of the lead-acid batteries 1, such as voltage, internal resistance, and temperature, at a predetermined timing (e.g., once a day). The control unit 10 uses the acquired measurement data to detect the overall state of the group of lead-acid batteries 1 stored in the battery panel, as well as the state of each individual battery. If an abnormal state is detected, the control unit 10 outputs a signal indicating the abnormality from the connection unit 50 to the uninterruptible power supply 5 that uses the lead-acid batteries 1, and notifies the customer's network of the abnormality from the second communication unit 52.

[0040] 4 is a flowchart showing an example of a measurement procedure. The control unit 10 executes the following process for each bank at a predetermined timing. The control unit 10 executes the process for all banks stored in the battery panel in order.

[0041] The processing unit 100 of the control unit 10 selects one piece of identification information of the sensor unit 20 (step S101). The processing unit 100 broadcasts a message including the selected identification information to the multiple sensor units 20 (step S102).

[0042] Each of the multiple sensor units 20 may be activated intermittently from a sleep state. For example, when each of the multiple sensor units 20 receives a message at the time of activation, it determines whether or not the identification information included in the message matches the identification information stored in the memory of the sensor unit itself. Among the multiple sensor units 20, the sensor unit 20 that has been given identification information that matches the selected identification information responds to the message. This sensor unit 20 continues the subsequent processing while remaining activated. The other sensor units 20 ignore the message from the control unit 10. The other sensor units 20 return to a sleep state.

[0043] The processing unit 100 receives a response of the selected identification information from the sensor unit 20 (step S103). The processing unit 100 establishes a communication connection (pairing) with the responding sensor unit 20 (step S104).

[0044] The processing unit 100 transmits a measurement request to the communicatively connected sensor unit 20 (step S105).

[0045] When the sensor unit 20 receives a measurement request from the control unit 10, it measures the voltage, internal resistance, and temperature of the lead-acid battery 1 to which the sensor unit 20 is attached. The sensor unit 20 transmits measurement data including the voltage, internal resistance, and temperature obtained by the measurement to the control unit 10. After transmitting the measurement data, the sensor unit 20 transitions to a sleep state, and the communication connection is cut off. The sensor unit 20 may transition to the sleep state after receiving a sleep instruction from the control unit 10.

[0046] The processing unit 100 receives the measurement data in response to the request (step S106).

[0047] The processing unit 100 acquires the total voltage value of the bank and the current value of the bank outputted from the measurement unit 30 (step S107). The processing unit 100 identifies the state based on the total voltage value and the current value of the bank including the lead-acid battery 1 for which the measurement data was acquired (step S108).

[0048] The state includes, for example, four states: "floating charging", "charging", "discharging", and "other". "Floating charging" is identified based on the total voltage value and current value of the bank. For example, the processing unit 100 identifies "floating charging" when the total voltage value of the bank is within a specific voltage value ± several percent and the charging current value is less than a specific numerical value. Here, the specific voltage value is a value obtained by multiplying the number of lead-acid batteries 1 included in the bank by the voltage value of each lead-acid battery 1 when fully charged. For example, the specific voltage value is set to 2.23 (V) × the number of lead-acid batteries 1 included in the bank, and the several percent is set to 3%. For example, the specific current value is set to less than 0.02 CA.

[0049] "During float charging" may also be "during trickle charging" if the lead-acid battery 1 is configured to be trickle charged.

[0050] When the charging current value is equal to or greater than 0.02 CA, the processing unit 100 identifies the state as "charging".

[0051] When the current value is a discharge current value of 0.02 CA or more, the processing unit 100 identifies the state as "discharging".

[0052] The processing unit 100 determines the state as "other" when the total voltage value and current value of the bank do not correspond to "floating charging", "charging", or "discharging". For example, the processing unit 100 determines the state as "other" when the charging voltage is high, the charging voltage is low, or the discharging current is less than 0.02 CA.

[0053] The processing unit 100 stores the measurement data received in step S106 and the state data indicating the state specified in step S108 in association with the selected identification information (step S109).

[0054] The processing unit 100 judges whether or not the identification information of all the sensor units 20 included in the bank has been selected (step S110). If it is judged that all have not been selected (S110: NO), the processing unit 100 returns the process to step S101 and selects the identification information of the next sensor unit 20.

[0055] If it is determined in step S110 that the identification information of all the sensor units 20 has been selected (S110: YES), the processing unit 100 ends the measurement process for the bank.

[0056] The processing unit 100 stores the measurement data and status data of each of the lead-acid batteries 1 stored in the battery panel by the processing procedure shown in Fig. 4. In addition to the processing shown in Fig. 4, the processing unit 100 determines the presence or absence of an abnormality in each of the lead-acid batteries 1 based on the stored measurement data and status data.

[0057] In the processing procedure shown in Fig. 4, the state of each lead-acid battery is identified as "float charging" or not each time measurement data is received. The processing unit 100 may identify the state of "float charging" or not while acquiring measurement data in a predetermined unit such as two or three.

[0058] 5 is a flowchart showing an example of an abnormality detection process. The processor 100 executes the following process for each bank at a predetermined timing. The processor 100 executes the process for all banks stored in the battery panel in order.

[0059] The processing unit 100 selects one piece of identification information of the sensor unit 20 (step S201). The processing unit 100 reads out the measurement data and state data stored in association with the selected identification information (step S202).

[0060] The processing unit 100 determines whether or not it is possible to exclude abnormality detection (prohibit detection of voltage abnormality during deviation from float charging) (step S203). The processing unit 100 may make this determination based on whether or not it is connected to the measuring unit 30. The processing unit 100 may also make this determination based on whether or not it is able to read out the status data in step S202. This is because the status cannot be identified if the total voltage value and current value cannot be acquired from the measuring unit 30.

[0061] When it is determined that it is possible to exclude the detection of an abnormality (S203: YES), the processing unit 100 determines whether the state when the measurement data was acquired was "float charging" or not (step S204).

[0062] If it is determined that the abnormality detection cannot be excluded (S203: NO), the processing unit 100 advances the process to step S205.

[0063] If it is determined that the state data at the time of measurement was "floating charging" (S204: YES), the processing unit 100 determines whether the voltage value of the measurement data is within a predetermined range (step S205).

[0064] If it is determined that the state data at the time of measurement was not "floating charging" but was, for example, "charging", "discharging" or "other" (S204: NO), the processing unit 100 does not detect an abnormality based on the measurement data from the sensor unit 20 of the selected identification information. The processing unit 100 proceeds to step S209.

[0065] If the voltage value of the measurement data is within the predetermined range (S205: YES), the processing unit 100 determines that the lead-acid battery 1 corresponding to the sensor unit 20 of the selected identification information is not abnormal. The processing unit 100 advances the process to step S209.

[0066] If the voltage value of the measurement data is not within the predetermined range (S205: NO), the processing unit 100 determines that the corresponding lead-acid battery 1 is in an abnormal state. The processing unit 100 stores the abnormal state in association with the identification information (step S206). The processing unit 100 determines whether the lead-acid battery 1 has been determined to be in an abnormal state continuously for a predetermined period of time (step S207).

[0067] If it is determined that the abnormal state continues (S207: YES), the processing unit 100 notifies the abnormality of the lead-acid battery 1 (step S208), and the process proceeds to step S209.

[0068] In step S208, the processing unit 100 outputs a signal indicating the abnormality from the connection unit 50 to the UPS 5, and notifies the customer's network of the abnormality from the second communication unit 52. In step S208, the processing unit 100 may cause the display unit 40 to display text or an image indicating the abnormality.

[0069] When it is not determined that the abnormal state continues (S207: NO), the processing unit 100 advances the process to step S209.

[0070] The decision as to whether or not to notify of an abnormality is not limited to the condition that an abnormal state is continuously determined, but may be based on the condition that an abnormal state is determined a predetermined number of times or more, or on the condition using the number of times within a predetermined period, i.e., the frequency.

[0071] The processing unit 100 judges whether or not the identification information of all the sensor units 20 included in the target bank has been selected (step S209). If it is judged that all have not been selected (S209: NO), the processing unit 100 returns the process to step S201 and selects the identification information of the next sensor unit 20.

[0072] If it is determined in step S209 that the identification information of all the sensor units 20 has been selected (S209: YES), the processing unit 100 ends the abnormality detection process for the bank.

[0073] According to this embodiment, it is possible to allow the UPS 5 to perform intermittent float charging of the lead-acid battery 1. It is possible to avoid erroneously determining that a normal lead-acid battery 1 is abnormal based on measurement data measured when the UPS 5 is idle, i.e., when the lead-acid battery 1 is not float charged.

[0074] (Embodiment 2) In the second embodiment, abnormality detection is performed based on the voltage value, internal resistance, and temperature measured when the lead-acid battery 1 is not being float-charged, but no notification of the abnormality is given.

[0075] The control unit 10 of the second embodiment is similar to that of the first embodiment except for the abnormality detection process procedure, so the same reference numerals are used for the common configurations and detailed description thereof will be omitted.

[0076] Fig. 6 is a flowchart showing an example of an anomaly detection procedure according to the embodiment 2. Among the procedure shown in Fig. 6, steps common to the procedure shown in Fig. 5 of the embodiment 1 are given the same step numbers and detailed description thereof will be omitted.

[0077] The processing unit 100 reads out the measurement data and status data stored in association with the selected identification information (S202), and determines whether or not the voltage value of the measurement data is within a predetermined range (S205).

[0078] If it is determined that the voltage value of the measurement data is within the predetermined range (S205: YES), the lead-acid battery 1 corresponding to the sensor unit 20 of the selected identification information is not abnormal. The processing unit 100 proceeds to step S209.

[0079] If it is determined that the voltage value of the measurement data is not within the predetermined range (S205: NO), the processing unit 100 determines whether the state of the lead-acid battery 1 at the time of measurement was "in floating charging" (step S216).

[0080] If it is determined that the battery 1 is in "float charging" (S216: YES), the processing unit 100 determines that the lead-acid battery 1 is in an abnormal state. The processing unit 100 stores the abnormal state in association with the identification information (step S217). The processing unit 100 advances the process to step S207.

[0081] If it is determined that the battery was not in "float charging" (S216: NO), the voltage of the lead-acid battery 1 is in an abnormal state, but the battery is not subject to abnormality detection. The processing unit 100 stores the voltage value of the lead-acid battery 1 and status data indicating that the battery was not in float charging (step S218), and proceeds to step S209.

[0082] 6, the processing unit 100 executes anomaly detection processing based on measurement data of the lead-acid battery 1 that was not in float charging at the time of measurement, but does not notify the abnormality. The processing unit 100 can distinguish between a state in which an abnormality should not be notified and a state in which an abnormality should be notified.

[0083] (Embodiment 3) In the third embodiment, the processing unit 100 detects that charging of the lead storage battery 1 is stopped by a notification from the outside.

[0084] 7 is a block diagram showing the configuration of the control unit 10. In the third embodiment, the measurement unit 30 is not used. The processing unit 100 does not include a third communication unit 53. The configuration of the control unit 10 in the third embodiment is the same as that in the first embodiment except for the third communication unit 53, so that the same reference numerals are used for the configurations common to the first embodiment and detailed description thereof will be omitted.

[0085] Fig. 8 is a flowchart showing an example of a measurement procedure. Among the procedures shown in Fig. 8, steps common to the procedures shown in Fig. 4 of the first embodiment are given the same step numbers and detailed descriptions thereof will be omitted.

[0086] When the processing unit 100 receives the measurement data from the sensor unit 20 (S106), it acquires a history of notifications from the higher-level device that uses the lead-acid battery 1 (step S117). For example, the control unit 10 receives notifications of the device states "charging start", "discharging start", "charging end", "discharging end", "operation stop", and "operation start" from the higher-level device (UPS 5) via the connection unit 50.

[0087] The processing unit 100 identifies the status data based on the acquired notification history (step S118). After "operation stop", the processing unit 100 identifies the status data as "operation stop state" until it receives a notification of "operation start". After "charging start", the processing unit 100 identifies the status data as "charging" until it receives a notification of "charging end". After "discharging start", the processing unit 100 identifies the status data as "discharging" until it receives a notification of "discharging end".

[0088] After step S118, the processing unit 100 stores the measurement data received in step S106 and the status data indicating the status specified in step S118 in association with the currently selected identification information (S109).

[0089] Fig. 9 is a flowchart showing an example of an anomaly detection procedure. Among the procedures shown in Fig. 9, steps common to the procedures shown in Fig. 5 of the first embodiment are given the same step numbers and detailed descriptions thereof will be omitted.

[0090] In embodiment 3, the processing unit 100 reads out the measurement data and status data stored in association with the selected identification information (S202), and determines whether the status at the time of measurement was "operation stopped state," "charging," or "discharging" (step S224).

[0091] If the processing unit 100 determines that the state is either "operation stopped state", "charging", or "discharging" (S224: YES), the processing unit 100 does not perform abnormality detection based on the measurement data from the sensor unit 20 of the selected identification information. The processing unit 100 advances the process to step S209.

[0092] If the processing unit 100 determines that the state is not "operation stopped," "charging," or "discharging" (S224: NO), it determines whether the voltage value of the measurement data is within a predetermined range (S205).

[0093] In the third embodiment, the processing unit 100 may use the measurement unit 30 to identify the state including whether or not the battery is in "float charging", and may also identify the "operation stopped state" state based on a notification from a higher-level device. In this case, if the battery is in the "operation stopped state" even though the bank is in a fully charged state and the total voltage value and current value are the same as in "float charging", the processing unit 100 does not execute the abnormality detection process, or does not notify the abnormality even if it detects an abnormality.

[0094] In the first to third embodiments, an example has been described in which a plurality of lead-acid batteries 1 are connected to a UPS 5. Alternatively, the present technology may be applied to a case in which a storage battery is used for an application other than a backup power supply using a UPS 5, for example, in a large-scale power storage system, and the operation of some of the banks is intermittently stopped.

[0095] The embodiments disclosed above are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0096] 1 lead acid battery 10. Control Unit 20 Sensor unit 30 Measurement Units 53 Third Communications Department

Claims

1. A method for detecting a state of a plurality of storage batteries connected in series and / or parallel, comprising the steps of: Acquiring measurement data of the plurality of storage batteries; Identifying whether each of the plurality of storage batteries was in a floating charge state or in another state at the time when the measurement data was measured; storing the measurement data and status data indicating a status in association with identification information for individually identifying the plurality of storage batteries; After the measurement for the plurality of storage batteries is completed, the measurement data and the status data for the plurality of storage batteries are read out individually, and the presence or absence of an abnormality is determined based on the measurement data for the storage batteries that were undergoing floating charge when the measurement data was measured. Detection method.

2. A detection device for detecting a state of a plurality of storage batteries connected in series and / or parallel, A plurality of sensor units attached to the plurality of storage batteries; A control unit capable of wirelessly connecting to the sensor unit, The control unit includes: requesting the sensor unit to measure data of each of the plurality of storage batteries; acquiring measurement data of each of the storage batteries from the sensor unit; For each of the plurality of storage batteries, it is determined whether the storage batteries were in a floating charge state or in another state when the measurement data was measured. storing the measurement data and status data indicating a status in association with identification information for individually identifying the plurality of storage batteries; Repeating the measurement request and the acquisition of the measurement data from the plurality of sensor units; After the measurement for the plurality of storage batteries is completed, the measurement data and the status data for the plurality of storage batteries are read out individually, and the presence or absence of an abnormality is determined based on the measurement data for the storage batteries that were undergoing floating charge when the measurement data was measured. Detection device.

3. The control unit includes: Acquire a total voltage value and a total current value of the plurality of storage batteries connected in series; When the total voltage value is within a predetermined range and the current value is equal to or less than a predetermined value at the time of measurement of the measurement data, it is determined that floating charging is in progress. The detection device of claim 2.

4. A detection device for detecting a state of a plurality of storage batteries connected in series and / or parallel, A plurality of sensor units attached to the plurality of storage batteries; A control unit capable of wirelessly connecting to the sensor unit, The control unit includes: Requesting the sensor unit to measure data of the storage battery; Acquiring measurement data from the sensor unit; Identifying whether each of the plurality of storage batteries was in a floating charge state or in another state at the time when the measurement data was measured; storing the measurement data and status data indicating a status in association with identification information for individually identifying the plurality of storage batteries; After the measurement for the plurality of storage batteries is completed, the measurement data and the status data for the plurality of storage batteries are read out individually, and the presence or absence of an abnormality is determined based on the measurement data for the storage batteries that were undergoing floating charge when the measurement data was measured. Detection device.

5. On the computer, Acquire measurement data of data of a plurality of storage batteries connected in series and / or in parallel; Identifying whether each of the plurality of storage batteries was in a floating charge state or in another state at the time when the measurement data was measured; storing the measurement data and status data indicating a status in association with identification information for individually identifying the plurality of storage batteries; After the measurement for the plurality of storage batteries is completed, the measurement data and the status data for the plurality of storage batteries are read out individually, and the presence or absence of an abnormality is determined based on the measurement data for the storage batteries that were undergoing floating charge when the measurement data was measured. A computer program that executes a process.

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