Management System for Power Storage Device and Method for Managing Power Storage Device

Abstract

To provide a system and a method, capable of preserving a power storage device for a long period of time in a state in which the power storage device can be used without delay.SOLUTION: A power storage device management system comprises: a power storage device including a communication module; and a management device capable of performing radio communication with the power storage device. The power storage device has a long preservation mode for shutdown for device components. The management device is configured to execute processing of at least one of outputting first information on long period preservation of the power storage device after a lapse of a predetermined period from the start of the long period preservation mode and outputting second information on the long period preservation of the power storage device when operation for starting the long period preservation mode is performed. For example, the management device outputs information for promoting charging of the power storage device, as the first information.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a management system and a management method for a power storage device, and more particularly to a management system and a management method for a portable power storage device.

Background Art

[0002] Conventionally, portable power storage devices that can be carried have been used as power sources for electric vehicles such as electric assist bicycles, electric motorcycles, and electric carts, and electrical equipment such as computers and printers. In addition, portable power storage devices are also used as emergency power sources when power outages, disasters, etc. occur.

[0003] In recent years, power storage devices equipped with a wireless communication module for transmitting information on the state of the power storage device to an information terminal such as a smartphone have also been proposed (see, for example, Patent Document 1). According to the power storage device equipped with a wireless communication module, information on the state of the power storage device such as the charging rate and temperature is transmitted to the user's smartphone or the like, so it is easy to check the state of the power storage device.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, it is desirable that the power storage device can be stored for a long period of time in a state where it can be used immediately. In particular, a power storage device used as an emergency power source is assumed to be stored without being used for a long period of time (for example, three months or more).

[0006] In order to store the power storage device in a state where it can be used immediately for a long period of time, it is necessary to reduce the internal power consumption of the device. However, since the power consumption of devices such as communication modules and microcontrollers is not small, it is not easy to suppress the internal power consumption. On the other hand, although it is conceivable to shut down these devices to suppress the internal power consumption, in that case, the user cannot check the state of the power storage device using the information terminal. For this reason, problems such as the power storage device not having a sufficient charge amount when used, or the management burden on the user increasing may occur.

Means for Solving the Problems

[0007] The management system of the power storage device according to the present disclosure includes a power storage device including a communication module and a management device capable of wireless communication with the power storage device. The power storage device has a long-term storage mode for shutting down the device constituent devices. The management device is configured to execute at least one of the following processes: outputting first information related to long-term management of the power storage device after a predetermined period has elapsed since the start of the long-term storage mode, and outputting second information related to long-term storage of the power storage device when an operation for starting the long-term storage mode is performed.

[0008] The management method of the power storage device according to the present disclosure is a management method of a power storage device including a communication module and having a long-term storage mode for shutting down the device constituent devices. The method is characterized by executing at least one of the following processes: outputting first information related to the power storage device after a predetermined period has elapsed since the start of the long-term storage mode, and outputting second information related to long-term storage of the power storage device when an operation for starting the long-term storage mode is performed.

Effects of the Invention

[0009] According to the management system and method of the energy storage device according to the present disclosure, the energy storage device can be stored for a long period of time in a state where it can be immediately used. In the long-term storage mode, since the device constituent devices are shut down, the internal power consumption during storage is suppressed. And since the user can acquire information related to the long-term storage of the energy storage device after a predetermined period has elapsed from the start of the long-term storage mode, it is possible to appropriately manage the energy storage device during long-term storage.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Modes for Carrying Out the Invention

[0011] Hereinafter, with reference to the drawings, an example of an embodiment of a management system and a management method for a power storage device according to the present disclosure will be described in detail. The embodiments described below are merely examples, and the present disclosure is not limited to the following embodiments. In addition, selectively combining the components of the plurality of embodiments and modifications described below is within the scope of the present disclosure.

[0012] The main body of the system according to the present disclosure includes a computer. By this computer executing a program, the functions of the main body of the system according to the present disclosure are realized. The computer includes a processor that operates according to a program as the main hardware configuration. The type of the processor is not limited as long as it can realize the above functions by executing the program. The processor is composed of one or more electronic circuits including an integrated circuit (IC) or a large-scale integrated circuit (LSI). The plurality of electronic circuits may be integrated on one chip or provided on a plurality of chips. The plurality of chips may be integrated into one device or provided in a plurality of devices. Further, the program is stored in a non-transitory storage medium such as a ROM, an optical disk, or a hard disk drive that can be read by a computer. The program may be stored in the storage medium in advance or supplied to the storage medium via a wide-area communication network including the Internet or the like.

[0013] Hereinafter, embodiments of the system and method according to the present disclosure will be described by taking the portable power storage device 10 including the communication module 12 as an example. However, the system and method according to the present disclosure can also be applied to a stationary power storage device installed in a specific place. However, the system and method according to the present disclosure are particularly useful in the portable power storage device 10.

[0014] FIG. 1 is a diagram schematically showing a management system 1 of a power storage device which is an example of an embodiment. FIG. 2 is a block diagram showing the configuration of the management system 1. As shown in FIGS. 1 and 2, the management system 1 includes a portable power storage device 10 including a communication module 12 and a management device capable of wireless communication with the power storage device 10. Although details will be described later, the power storage device 10 has a long-term storage mode for shutting down device constituent devices. The management device is configured to output predetermined information related to the long-term storage of the power storage device 10 after a predetermined period has elapsed since the start of the long-term storage mode of the power storage device 10. An example of the predetermined information is information for promoting charging of the power storage device 10.

[0015] The management device is further configured to output predetermined information related to the long-term storage of the power storage device 10 when an operation for starting the long-term storage mode is performed. In this specification, the predetermined information output after a predetermined period has elapsed since the start of the long-term storage mode is referred to as "first information", and the predetermined information output when an operation for starting the long-term storage mode is performed is referred to as "second information". The management device outputs the second information, for example, when it receives an operation signal for starting the long-term storage mode or when it receives a start signal indicating a transition to the long-term storage mode based on this operation.

[0016] In the present embodiment, the management device includes a management server 20 and an information terminal 30. The management server 20 and the information terminal 30 are configured to be communicable via a wide area communication network such as an Internet line or a mobile communication system. The power storage device 10 includes a communication module 12 and a control unit 13, and provides the management device with a charge rate (SOC), temperature, start information of the long-term storage mode, and the like. The power storage device 10 may be configured to be wirelessly communicable only with the information terminal 30, and the information of the power storage device 10 may be transmitted to the management server 20 via the information terminal 30.

[0017] In this case, the management server 20 acquires the start information of the long-term storage mode via the information terminal 30. The start information of the long-term storage mode of the power storage device 10 is stored at least in the management server 20. The management server 20 calculates the predetermined period (hereinafter referred to as "predetermined period T1") based on, for example, the state of the power storage device 10 at the start time of the long-term storage mode, or acquires the information of the predetermined period T1 from the information terminal 30, and after the elapse of the predetermined period T1, outputs predetermined information related to the long-term storage of the power storage device 10 to the information terminal 30. According to the management system 1, it is possible to store the power storage device 10 in a state where it can be used immediately for a long period of time.

[0018] The power storage device 10 is used in many places, such as offices, factories, public facilities (government offices, community centers, schools, hospitals, etc.), commercial facilities (stores, shopping malls, etc.), and each household. The power storage device 10 is managed by users such as owners and administrators. An example of the information terminal 30 constituting the management system 1 is a terminal device such as a smartphone, mobile phone, tablet terminal, or personal computer owned by the user. The management system 1 is configured such that a user, particularly a facility administrator, can check the state of the power storage device 10 using the information terminal 30.

[0019] The management server 20 constituting the management system 1 is a device that stores information related to the power storage device 10 and comprehensively manages the power storage device 10. For example, the start information of the long-term storage mode of the power storage device 10 may be stored only in the management server 20, or may be stored in both the management server 20 and the information terminal 30. An example of the management server 20 is a server of a manufacturer or management operator of the power storage device 10. Note that the management server 20 may be a server managed by the user.

[0020] The management system 1 may include a plurality of power storage devices 10. The management server 20 manages information for each registered power storage device 10. For example, when there are a plurality of power storage devices 10 in the long-term storage mode, the management server 20 manages a predetermined period T1 for each power storage device 10. The registration of the power storage device 10 to the management server 20 is performed using the information terminal 30. Also, when the user has a plurality of power storage devices 10, a plurality of power storage devices 10 may be managed by one information terminal 30. Alternatively, when the user has many power storage devices 10, the information terminals 30 used for management may be divided for each group of a predetermined number of power storage devices 10.

[0021] In FIGS. 1 and 2, a plurality of power storage devices 10, one information terminal 30 that manages each power storage device 10, and a management server 20 that can communicate with the information terminal 30 are illustrated. Each power storage device 10 provides information to the information terminal 30 by short-range wireless communication such as Bluetooth (registered trademark), Wi-Fi (registered trademark), NFC, etc. Hereinafter, the constituent units of the system illustrated in FIGS. 1 and 2 will be described in detail. However, the management server 20 of the management system 1 may manage information on many power storage devices 10 owned by other users. For example, information terminals 30 of other users are connected to the management server 20, and information on other power storage devices 10 is registered.

[0022] Hereinafter, the power storage device 10, the management server 20, and the information terminal 30 that constitute the management system 1 will be described in detail.

[0023] [Power Storage Device 10] The power storage device 10 includes a battery module 11 and a case 14 that houses the battery module 11. The power storage device 10 is a portable power storage device that can be carried around and is generally also called a battery pack. Further, the power storage device 10 includes a communication module 12 and a control unit 13. The communication module 12 and the control unit 13 are housed in the case 14 together with the battery module 11. The battery module 11 is charged, for example, using a charger 40. The charger 40 may have an outlet 43 to which an electrical device is connected, and the power storage device 10 may be discharged while the power storage device 10 is installed on the charger 40.

[0024] The battery module 11 may be composed of a single battery, but is preferably configured as a battery pack including a plurality of batteries. The shape of the batteries constituting the battery pack is not particularly limited and may be, for example, any of a cylindrical battery, a pouch-type battery, and a prismatic battery. Also, the type of battery is not particularly limited, but a high-capacity lithium-ion battery is given as a suitable example. The power storage device 10 may be provided with a connector for taking out electric power from the battery module 11.

[0025] The power storage device 10 is provided with measuring devices such as a voltmeter for measuring the voltage of the battery module 11, an ammeter for measuring the current, and a temperature sensor for measuring the temperature. Based on these measured values, the control unit 13 calculates a value indicating the state of the battery module 11, such as the state of charge of the battery module 11. The state of charge can be calculated based on the voltage of the battery module 11 measured by the voltmeter. Further, the control unit 13 may calculate the degree of deterioration of the battery module 11 based on these measured values.

[0026] The case 14 may be a metal case, but from the viewpoints of communication performance, weight reduction, etc., it is preferably a resin case. The case 14 is generally opaque and conceals the battery module 11 etc. housed inside. The case 14 shown in FIG. 1 is formed in a substantially rectangular parallelepiped shape, and a handle 15 used when carrying the power storage device 10 is provided at the upper end of the case 14. Also, a connection part 16 to be inserted into a battery installation part such as a charger and a discharger is provided at the lower part of the case 14. The connection part 16 has a terminal 16A electrically connected to the battery module 11.

[0027] The case 14 is provided with a remaining amount display button 17 and an indicator 18. The remaining amount display button 17 is an operation part for causing the indicator 18 to display the charging rate of the battery module 11. The indicator 18 includes, for example, a plurality of lamps, and displays the charging rate by changing the number of lamps to be lit according to the charging rate. The indicator 18 may be a display part capable of displaying the charging rate numerically, or may be capable of displaying the state of the power storage device 10 other than the charging rate.

[0028] The remaining amount display button 17 may also be used as an operation part for shutting down the power storage device 10 and starting the long-term storage mode. For example, by performing a normal first operation of pressing the remaining amount display button 17 briefly, the charging rate is displayed on the indicator 18, and by performing a second operation of pressing the remaining amount display button 17 for a long time, the power storage device 10 is shut down. Note that the operation part for executing the long-term storage mode may be provided separately from the remaining amount display button 17.

[0029] In this embodiment, operation information for starting the long-term storage mode by long-pressing the remaining amount display button 17, or start information for the long-term storage mode, is output from the power storage device 10 and acquired by the information terminal 30. An example of the operation information is an operation signal indicating that the remaining amount display button 17 has been long-pressed. An example of the start information is a start signal indicating that the constituent devices of the power storage device 10 are shut down and shift to the long-term storage mode. Similarly, end information for the long-term storage mode, that is, information indicating that the power storage device 10 has been activated and returned from the long-term storage mode, is also output from the power storage device 10 and acquired by the information terminal 30.

[0030] The power storage device 10 outputs information including at least one of the charge rate and temperature of the power storage device 10, for example, together with the operation information or start information for the long-term storage mode. At least one of the charge rate and temperature of the power storage device 10 at the time when the operation to start the long-term storage mode is performed is acquired by the information terminal 30. Although details will be described later, information such as the charge rate and temperature of the power storage device 10 acquired at this time may be used for the calculation of a predetermined period T1 and the optimization process of the storage state of the power storage device 10. Note that the information such as the charge rate and temperature of the power storage device 10 does not necessarily need to be acquired at exactly the same time as the operation information or start information for the long-term storage mode.

[0031] The communication module 12 is a device for wirelessly communicating with the management device. Information of the power storage device 10 is transmitted to the management device by the function of the communication module 12. In this embodiment, any device having a wireless communication function between the power storage device 10 and the information terminal 30 existing in the vicinity may be used. The configuration of the communication module 12 is not particularly limited, but from the viewpoint of reducing power consumption and the like, it is preferably a short-range wireless communication module.

[0032] As a specific example, a module that performs BLE (Bluetooth (registered trademark) Low Energy) communication can be mentioned. BLE corresponds to version 4 of Bluetooth (registered trademark), which is a short-range wireless communication standard. Since the power consumption for BLE communication is relatively small, by using the BLE module, the internal power consumption of the power storage device 10 can be suppressed. Note that Bluetooth (registered trademark) corresponds to the IEEE802.15.1 standard, which is an international standard for short-range wireless communication.

[0033] The control unit 13 has a function of controlling the operation of the power storage device 10, such as charging and discharging of the battery module 11, calculation of information indicating the state of the power storage device 10, information transmission via the communication module 12, and start of the long-term storage mode based on the operation of the remaining amount display button 17. The information of the power storage device 10 is transmitted to the information terminal 30 by the function of the communication module 12 under the control of the control unit 13. The control unit 13 outputs, for example, information prompting charging when the charging rate becomes less than a predetermined threshold value, and information indicating an abnormality when an abnormality occurs. Further, the control unit 13 may output information indicating the state of the power storage device 10 based on a request from the information terminal 30.

[0034] The control unit 13 is composed of a microcomputer including a processor and a memory. The memory includes, for example, non-volatile memories such as RAM, ROM, and hard disk. The processor reads and executes a program installed in the memory to realize the functions of the power storage device 10. Further, the control unit 13 may have a protection board called a BMS board, which monitors the state of the battery module 11 and performs optimal charging and discharging.

[0035] Here, the long-term storage mode of the power storage device 10 will be described. As described above, the long-term storage mode is a mode in which the device constituent devices are shut down. By shutting down the device constituent devices, the internal power consumption of the power storage device 10 is suppressed in the long-term storage mode, enabling long-term storage in a state where the power storage device 10 can be used immediately. For example, when storing the power storage device 10 in a predetermined charge state without use for a long period of three months or more, the long-term storage mode is effective. By setting the power storage device 10 to the long-term storage mode, a predetermined charge state (for example, a charge rate of 70% or more) can be maintained for a long period without frequent charging.

[0036] In the long-term storage mode, it is preferable to shut down at least the devices with high power consumption. Shutting down means completely or substantially blocking the power supply from the battery module 11 to other device constituent devices to stop the functions of the devices. In the long-term storage mode, it is preferable that the communication module 12 and the control unit 13 with relatively high power consumption are shut down. In the present embodiment, in the long-term storage mode, all the device constituent devices supplied with power from the battery module 11 are shut down.

[0037] In the long-term storage mode, while the device constituent devices including the communication module 12 and the control unit 13 are shut down and the internal power consumption is reduced, the communication function of the power storage device 10 is lost. Therefore, for the power storage device 10 in the long-term storage mode, it is not possible to confirm the charge rate and the like using the information terminal 30. To address this point, the management system 1 stores the start of the long-term storage mode, and after a predetermined period has elapsed since the start, outputs information for prompting charging of the power storage device 10 to the information terminal 30, for example. This function greatly reduces the management burden on the user and makes it easy to manage the charge state of the power storage device 10 during long-term storage.

[0038] The long-term storage mode is started by a user operation. In this embodiment, the long-term storage mode is started by a long press operation on the remaining amount display button 17. At this time, information indicating the state of the power storage device 10 such as the charge rate and temperature of the battery module 11 may be transmitted to the management device. The management device may output information prompting charging when the charge rate of the power storage device 10 starting the long-term storage mode is lower than a predetermined value. Also, when the temperature of the power storage device 10 deviates from an appropriate range, information prompting storage at an appropriate temperature may be output. Alternatively, the management system 1 may be configured to prohibit the start of the long-term storage mode when the storage state such as the charge rate and temperature of the power storage device 10 is not appropriate.

[0039] The determination as to whether the storage state of the power storage device 10 in which the long press operation on the remaining amount display button 17 is performed is appropriate may be made by the power storage device 10 or by the management device. Regardless of which device makes this determination, information for optimizing the storage state can be output to the information terminal 30. In this embodiment, when the storage state of the power storage device 10 is appropriate, all device component devices are shut down and the long-term storage mode is entered. Before performing the shutdown, the power storage device 10 transmits a start signal for the long-term storage mode to the management device if necessary.

[0040] The power storage device 10 in the long-term storage mode can be activated using the charger 40. The charger 40 includes a charge and discharge circuit 41, a cord 42, and a plug 43, and functions as a charger by connecting the cord 42 to a power source. The charger 40 has a recess into which the connection portion 16 of the power storage device 10 can be inserted. The recess is provided with a plus terminal 44, a minus terminal 45, a detection terminal 46, and communication terminals D, R. The detection terminal 46 is a terminal having a function of detecting that the power storage device 10 is connected.

[0041] When the power storage device 10 in the long-term storage mode is connected to the charger 40, the power storage device 10 is activated with the current flowing through the detection terminal 46 as a trigger and returns from the long-term storage mode. In the charger 40, the negative terminal 45 and the detection terminal 46 are electrically connected. Therefore, when the power storage device 10 is inserted into the recess of the charger 40, the negative terminal 45 and the detection terminal 46 are short-circuited on the charger 40 side, and the control unit 13 (microcomputer) is activated by the current flowing through this short circuit. As a result, the power storage device 10 returns from the long-term storage mode. Note that the device used to activate the power storage device 10 may be a charger that does not have a discharge function.

[0042] [Management server 20] As described above, the management server 20 stores information on the power storage device 10. In the management server 20, for example, information on a plurality of power storage devices 10 and a plurality of information terminals 30 is stored in a state associated with the information terminal 30 used for the management of each power storage device 10 for each power storage device 10. Initial registration of the power storage device 10 and the information terminal 30 to the management server 20, change of the registered content, etc. can be performed by operating the information terminal 30. At least a part of the information on the registered power storage device 10 is automatically transmitted to the management server 20 via the information terminal 30.

[0043] Similar to the control unit 13 of the power storage device 10, the management server 20 has a processor 21 and a memory 22. The management server 20 may be composed of one computer or may be composed of a plurality of computers. The processor 21 realizes the functions of the management server 20 by reading and executing the program installed in the memory 22. In addition, the processor 21 acquires information on the power storage device 10 and the information terminal 30 and stores it in the memory 22.

[0044] The information of the power storage device 10 stored in the memory 22 of the management server 20 includes information regarding long-term storage. Specific examples of such information include whether the long-term storage mode is being executed, and if the long-term storage mode is being executed, first date-time information including the start date or start date and time, second date-time information including the scheduled date or scheduled date and time for outputting predetermined information such as charging recommendations to the information terminal 30, and the like. The second date-time information is calculated based on the first date-time information and a predetermined period T1. The management server 20 may acquire the start information of the long-term storage mode and also acquire information regarding the state of the power storage device 10, such as the charging rate and temperature of the power storage device 10 at that time. The management server 20 may store the same information as the information stored in the information terminal 30 or different types of information as information regarding the power storage device 10.

[0045] In the management server 20, for example, in addition to the above long-term storage information, product information of the power storage device 10 (product number, manufacturing date, etc.), information regarding the information terminal 30 (email address, telephone number, SNS ID, app ID of the management system 1 installed in the information terminal 30, etc.), information regarding the user of the power storage device 10, and the like are stored. Information of the information terminal 30 such as the email address is used when transmitting information regarding the long-term storage of the power storage device 10 from the management server 20.

[0046] After a predetermined period has elapsed since the start of the long-term storage mode of the power storage device 10, the management server 20 outputs first information regarding the long-term storage of the power storage device 10 to the information terminal 30. The management server 20 has, for example, a calendar function and transmits the first information to the information terminal 30 when the current time reaches the scheduled date and time for outputting the first information. The predetermined period T1 may be a predetermined fixed period or may be calculated from the state of the power storage device 10 at the start of the long-term storage mode. Also, the management server 20 may acquire information on the predetermined period T1 from the information terminal 30.

[0047] As an example of the first information output from the management server 20, information for promoting charging of the power storage device 10 can be cited. The predetermined period T1 is set, for example, to a period during which it is estimated that the charge rate of the power storage device 10 will drop to a predetermined value (for example, 70%), or to a period several days shorter than the estimated period. By transmitting information for promoting charging of the power storage device 10 to the information terminal 30 after a predetermined period has elapsed since the start of the long-term storage mode, it is possible to effectively suppress the continuation of storage of the power storage device 10 in a state where the charge rate is low. The number of times of transmitting the information for promoting charging of the power storage device 10 may be once or multiple times.

[0048] The management server 20 transmits, for example, a notice of the charging time as illustrated in FIG. 7 described later to the information terminal 30 to prompt the user to charge the power storage device 10 during long-term storage. Further, the management server 20 may transmit information on the estimated current charge rate as information for promoting charging of the power storage device 10. Alternatively, as information related to long-term storage, information such as the elapsed time since the start of the long-term storage mode and information for prompting periodic confirmation of the state of the power storage device 10 may be transmitted. Such information does not directly promote charging, but arouses the user's attention and consequently promotes charging.

[0049] When the management server 20 outputs the first information related to long-term storage for the first power storage device 10, for example, it may also output the first information for the second power storage device 10 that has the same administrator. The management server 20, for example, outputs the first information for the second power storage device 10 together when the remaining period until the predetermined period T1 related to the second power storage device 10 elapses is less than a predetermined threshold, for example, less than one month. The second power storage device 10 only needs to satisfy this condition, and there may be a plurality of them. For example, by outputting information for promoting charging also for the second power storage device 10 for which the predetermined period T1 is approaching, it becomes possible to charge a plurality of power storage devices 10 together, reducing the work burden on the user.

[0050] [Information Terminal 30] The information terminal 30 acquires information from the power storage device 10 and is used when checking the state of the power storage device 10. The information terminal 30 has a monitor 33 for displaying information of the power storage device 10. The information terminal 30 may be a dedicated terminal of the management system 1, but as an example, a smartphone or the like possessed by a user can be mentioned. For example, by installing the application software (hereinafter simply referred to as "app") of the management system 1, the user's smartphone can be used as the information terminal 30 of the management system 1.

[0051] Only an arbitrary information terminal among the information terminals installed with the app may be operated as the information terminal 30 included in the management system 1. For this reason, when registering the user of the app, it is preferable that at least the two-stage registration described below can be performed. The first stage is simply registration as a user for using the power storage device 10. The second stage is registration as an administrator for managing the power storage device 10, such as performing preliminary charging of the power storage device 10 shown in this embodiment and handling in case of abnormality (hereinafter referred to as administrator registration). When performing administrator registration, it may be requested to provide contact information for receiving information for prompting charging and the like shown in this embodiment. As an example of the contact information, an email address, a phone number, SNS ID information, and the like can be mentioned.

[0052] Similar to the power storage device 10 and the management server 20, the information terminal 30 has a processor 31 and a memory 32. The processor 31 reads and executes a program (app of the management system 1) installed in the memory 32 to realize the functions as the information terminal 30. In addition, the processor 31 acquires information of the power storage device 10 and stores it in the memory 32, and transmits necessary information to the management server 20. In this embodiment, short-range wireless communication such as BLE is used for communication between the information terminal 30 and the power storage device 10, and a wide-area communication network such as an Internet line or a mobile communication system is used for communication with the management server 20.

[0053] The information terminal 30 acquires the operation information or start information of the long-term storage mode of the power storage device 10. In this embodiment, the operation signal obtained by long-pressing the remaining amount display button 17, or the start information of the long-term storage mode based on such operation is acquired by the information terminal 30. The long-term storage mode of the power storage device 10 may be started by the determination of the control unit 13, or may be started by the management device that has received the operation signal of the remaining amount display button 17 transmitting a shutdown signal or a permission signal to the power storage device 10. The shutdown signal or permission signal of the management device may be automatically transmitted, or may be transmitted based on the operation of the information terminal 30 by the user.

[0054] The information terminal 30 calculates, for example, a predetermined period T1 counted from the start of the long-term storage mode based on the state of the power storage device 10, and transmits the information of the calculated predetermined period T1 to the management server 20. Alternatively, the predetermined period T1 may be calculated by the management server 20 or the power storage device 10, or may be a predetermined fixed period. In this embodiment, after a predetermined period has elapsed since the start of the long-term storage mode, the management server 20 transmits information for prompting charging of the power storage device 10 to the information terminal 30, and such information is displayed on the monitor 33 of the information terminal 30.

[0055] When the predetermined period T1 is a predetermined fixed period, the information terminal 30 calculates the second date and time information including the scheduled date or scheduled date and time for transmitting information for prompting charging to the information terminal 30 from the first date and time information including the start date or start date and time of the long-term storage mode, and transmits the information to the management server 20. Also, when complex calculations are not required, such as when calculating the predetermined period T1 (second date and time information) using a simple mathematical formula, table, etc. based on at least one of the charging rate and temperature of the power storage device 10 at the start time of the long-term storage mode, the predetermined period T1 may be calculated by the information terminal 30.

[0056] In cases where the calculation is relatively complex, such as when calculating the degree of degradation of the energy storage device 10 and calculating a predetermined period T1 based on the degree of degradation, the management server 20 may calculate the predetermined period T1. The degree of degradation of the energy storage device 10 can be calculated, for example, from the temporal changes in the capacity, internal resistance, etc. of the battery module 11. The energy storage device 10 may periodically measure values such as the capacity and internal resistance of the battery module 11 and transmit them to the management server 20, and the management server 20 may calculate the degree of degradation of the energy storage device 10. Also, by using the relationship between the values of the capacity, internal resistance, etc. obtained in advance through experiments, etc. and the number of charge-discharge cycles, and counting the number of charge-discharge cycles of the battery module 11, the degree of degradation of the energy storage device 10 may be calculated.

[0057] When the charging rate of the energy storage device 10 is less than a predetermined threshold when an operation to start the long-term storage mode is performed, for example, the information terminal 30 outputs, as the above second information, information for promoting the charging of the energy storage device 10 to the monitor 33. The determination as to whether the charging rate of the energy storage device 10 is less than the threshold may be made by the energy storage device 10 or by the information terminal 30. When the information terminal 30 makes this determination, the charging rate of the energy storage device 10 is acquired together with an operation signal, for example, at the timing when the remaining amount display button 17 is long-pressed. The predetermined threshold may be set to a charging rate of 80% or more, or may be set to a value substantially corresponding to full charge.

[0058] When checking the charging rate during long-term storage of the energy storage device 10 and promoting its optimization when the charging rate is low, it is possible to prevent the energy storage device 10 from being stored long-term in a state with a low charging rate. When a shutdown signal or permission signal is output from the management device and the long-term storage mode is started, the shutdown signal or permission signal may be output on the condition that the charging rate of the energy storage device 10 is equal to or higher than a predetermined threshold. Alternatively, when the charging rate of the energy storage device 10 is less than a predetermined threshold, a signal for prohibiting the transition to the long-term storage mode may be output to the energy storage device 10.

[0059] When the temperature of the power storage device 10 is out of the predetermined threshold range when an operation for starting the long-term storage mode is performed, for example, the information terminal 30 outputs, as the second information, information prompting storage at an appropriate temperature to the monitor 33. The determination as to whether or not the temperature of the power storage device 10 is out of the threshold range may be made by the power storage device 10 or may be made by the information terminal 30. When the information terminal 30 makes this determination, the temperature of the power storage device 10 is acquired together with an operation signal, for example, at the timing when the remaining amount display button 17 is long-pressed. As the predetermined threshold range, only the upper limit value may be set, such as less than 40°C, but preferably both the upper and lower limit values are set.

[0060] When storing the power storage device 10 for a long time, by checking the temperature of the power storage device 10 and prompting its optimization when the storage temperature is inappropriate, it is possible to prevent the power storage device 10 from being stored for a long time in an inappropriate temperature environment. When a shutdown signal or a permission signal is output from the management device and the long-term storage mode is started, the shutdown signal or the permission signal may be output on the condition that the temperature of the power storage device 10 is within the predetermined threshold range. Alternatively, when the temperature of the power storage device 10 is out of the predetermined threshold range, a signal prohibiting the transition to the long-term storage mode may be output to the power storage device 10.

[0061] For example, when an operation for starting the long-term storage mode is performed and the power storage device 10 acquires the start information of the long-term storage mode, the information terminal 30 may output, as the second information, information including the next maintenance time to the monitor 33. For example, the recommended next charging time is displayed on the monitor 33. The information terminal 30 calculates the next charging recommendation date or recommended date and time (second date and time information) of the power storage device 10 based on the first date and time information including the start date or start date and time of the long-term storage mode. With this information, the user can grasp in advance the timing when maintenance is required and can also confirm that the long-term storage mode has been started.

[0062] Hereinafter, an example of the processing procedure in the long-term storage mode will be described in detail with reference to the flowcharts of FIGS. 3 to 5. Also, FIGS. 6 to 9 will be referred to as appropriate. FIGS. 6 to 9 show an example of a notification screen displayed on the monitor 33 of the information terminal 30 in the long-term storage mode.

[0063] FIG. 3 shows the processing procedures of each of the power storage device 10, the management server 20, and the information terminal 30 that constitute the management system 1. Note that steps S10 and S14 in FIG. 3 are performed by the user. The management process regarding the long-term storage of the power storage device 10 includes a step of outputting first information related to the power storage device 10 after a period has elapsed since the start of the long-term storage mode. The management process of the present embodiment further includes a step of outputting second information related to the long-term storage of the power storage device 10 when an operation for starting the long-term storage mode is performed.

[0064] As described above, the information regarding the long-term storage of the power storage device 10 is transmitted from the power storage device 10 to the information terminal 30 by short-range wireless communication such as BLE, and then transmitted to the management server 20 via the information terminal 30. As described above, in the management system 1, the contact information of the user registered as an administrator (administrator registration) when installing the application on the management terminal 30 is registered in advance. If it is not registered in advance, for example, the user's email address may be transmitted from the information terminal 30 to the management server 20 (S30), and the email address may be registered in the management server 20 (S20). Also, in the management server 20, the information of the user registered as an administrator and the power storage device 10 managed by the user may be stored in association with each other, or the information regarding the power storage device 10 may be independently registered in the management server 20.

[0065] The long-term storage mode of the power storage device 10 is started by a user operation (S10). In this embodiment, a long press operation of the remaining amount display button 17 is set as an operation to start the long-term storage mode. When the remaining amount display button 17 is long pressed, the power storage device 10 transmits an operation signal for the long-term storage mode by the functions of the communication module 12 and the control unit 13 based on this operation signal (S11). At this time, information on the charging rate and temperature of the power storage device 10 may be output together with the operation signal. Subsequently, it is determined whether the storage state is appropriate (S12). When the storage state is appropriate, after outputting a start signal for the long-term storage mode, the device configuration devices including the communication module 12 and the control unit 13 are shut down, and the power storage device 10 shifts to the long-term storage mode (S12).

[0066] In S12, it is preferable to determine whether the charging rate and temperature of the power storage device 10 are appropriate for long-term storage. The specific determination method is the same as in the cases of S321 and S323 in FIG. 5 described later. When it is determined that the storage state of the power storage device 10 is not appropriate, the device configuration devices are not shut down, and the user optimizes the storage state such as charging and temperature adjustment of the power storage device 10 (S14). The user optimizes the storage state according to the error display (S36) described later.

[0067] In S11, the operation signal transmitted from the power storage device 10 is acquired by the information terminal 30 (S31). Subsequently, when a start signal for the long-term storage mode is received from the power storage device 10 (S32), the process of the information terminal 30 proceeds to S33, and information including the next maintenance (charging) time is displayed on the monitor 33. The next charging time is calculated based on the charging rate, temperature, degree of deterioration, etc. of the power storage device 10 as described above. When performing the optimization process of the storage state in S12 and S14, a predetermined number of days may be added to the start date of the long-term storage mode to obtain the next charging date. Note that the management server 20 may calculate the next charging time and output information including the next charging time to the information terminal 30.

[0068] Figure 6 is an example of a notification screen for the next maintenance (charging) time. The notification screen shown in Figure 6 includes information identifying the power storage device 10 for which the long-term storage mode has been started, along with information notifying the next charging time, such as "The next maintenance (charging) time is [year] [month] [day]. A notice will be sent to the registered email address [X] days in advance." With this information, the user can grasp the next charging time in advance and confirm that the long-term storage mode has been started. The maintenance information is displayed, for example, on the screen of the application of the management system 1. Alternatively, it may be notified by email or the like via the management server 20.

[0069] In S34, the information terminal 30 transmits the start information of the long-term storage mode to the management server 20. The management server 20 stores information regarding the long-term storage mode in association with the information terminal 30 for each power storage device 10 (S21). After a predetermined period has elapsed since the start of the long-term storage mode, the management server 20 transmits a charging recommendation email to the email address of the registered information terminal 30 (S22, S23). The charging recommendation email is received by the information terminal 30 and displayed on the monitor 33 (S35). Note that the charging recommendation information may be transmitted to the application of the management system 1 installed in the information terminal 30, a pre-registered SNS, etc., together with or instead of the email.

[0070] Figure 7 is an example of a notification screen (email) for the charging recommendation information. The notification screen shown in Figure 7 includes information identifying the power storage device 10 that requires charging during long-term storage, along with information prompting charging, such as "We would like to inform you that the time for maintenance (charging) is approaching. Please refer to the details in the email. Thank you." With this information, the user can grasp the power storage device 10 that requires charging, and it is effectively suppressed that storage continues in a state where the charging rate is low. In the example shown in Figure 3, the charging recommendation information is notified by email, but similar to the above maintenance information, it may be displayed on the screen of the application of the management system 1.

[0071] In S32, if the start signal for the long-term storage mode is not received, it means that the storage state of the power storage device 10 is not appropriate. Therefore, the information terminal 30 outputs an error display to the monitor 33 (S36). The error display includes information indicating that the transition to the long-term storage mode cannot be made. The information terminal 30 may obtain the determination result of S12 from the power storage device 10, or obtain the charge rate and temperature from the power storage device 10 to determine whether the storage state is appropriate, and output information as shown in FIGS. 8 and 9 described later as the error display.

[0072] FIG. 4 is a diagram showing a modified example of the process shown in FIG. 3. In the flowchart of FIG. 4, the same reference numerals are used for the steps with the same processing content as in the flowchart of FIG. 3. The processing of the management server 20 is the same as the processing shown in FIG. 3. In the example shown in FIG. 4, it is different from the example shown in FIG. 3 in that when the power storage device 10 receives a shutdown signal from the information terminal 30, the shutdown of the device configuration devices including the communication module 12 and the control unit 13 is executed. Further, in the example shown in FIG. 4, the information terminal 30 determines whether the storage state of the power storage device 10 is appropriate. The shutdown signal is generated when it is determined in S301 and S302 that the storage state of the power storage device 10 is appropriate.

[0073] When the remaining amount display button 17 is long-pressed in S10, the power storage device 10 transmits the operation signal to the information terminal 30 by the functions of the communication module 12 and the control unit 13 (S100). When the information terminal 30 obtains the long-press operation signal of the remaining amount display button 17 in S300, it executes the optimization process of the storage state in S301, and when it determines that the storage state is appropriate, it transmits a shutdown signal to the power storage device 10 (S302, S303). On the other hand, when the storage state is not appropriate, it outputs information for improving the storage state (S322, S324 in FIG. 5), and the processing flow returns to S300.

[0074] When the power storage device 10 acquires a shutdown signal from the information terminal 30 in S101, it shuts down the device configuration devices including the communication module 12 and the control unit 13, and the power storage device 10 shifts to the long-term storage mode (S101). In other words, in the process shown in FIG. 4, based on the determination by the information terminal 30, when the state of the power storage device 10 is not an appropriate state, the shutdown of the power storage device 10 is not executed and the transition to the long-term storage mode is prohibited.

[0075] FIG. 5 shows the processing procedure for optimizing the storage state in S301 of FIG. 4. The information terminal 30 determines whether the charge rate of the power storage device 10 acquired in S300 of FIG. 3 is appropriate for long-term storage (S321). Specifically, the charge rate is compared with a predetermined threshold value to determine whether the charge rate is less than the threshold value. When the information terminal 30 determines that the charge rate of the power storage device 10 is less than the threshold value, it outputs information for prompting the charging of the power storage device 10 to the monitor 33 (S322). On the other hand, when the charge rate of the power storage device 10 is equal to or higher than the threshold value, S322 is skipped and the process proceeds to S323. The threshold value is set, for example, to 80% - 100%.

[0076] FIG. 8 is an example of a notification screen for information prompting the charging of the power storage device 10. The notification screen shown in FIG. 8 includes information for identifying the power storage device 10 that requires charging, as well as information for prompting charging such as "The battery capacity is not appropriate for long-term storage processing. Please charge to at least 〇% before storage." This information effectively suppresses the start of long-term storage of the power storage device 10 in a state where the charge rate is low. The information for prompting charging is displayed, for example, on the screen of the application of the management system 1. Alternatively, it may be notified by email or the like via the management server 20.

[0077] The information terminal 30 determines whether the temperature of the power storage device 10 obtained in S101 of FIG. 4 is appropriate for long-term storage (S323). Specifically, the temperature is compared with a predetermined threshold range to determine whether the temperature is outside the threshold range. When the information terminal 30 determines that the temperature of the power storage device 10 is outside the threshold range, it outputs information prompting storage at an appropriate temperature to the monitor 33 (S324). On the other hand, when the temperature of the power storage device 10 is within the threshold range, S324 is skipped and the optimization process ends. The threshold range is set, for example, to 10°C to 40°C.

[0078] FIG. 9 is an example of a notification screen for information prompting storage at an appropriate temperature. The notification screen shown in FIG. 9 includes information identifying the power storage device 10 for which the storage temperature is not appropriate, as well as information prompting storage at an appropriate temperature, such as "The temperature of the battery is not appropriate for long-term storage processing. Please store it within the range of △°C to ▽°C." This information effectively suppresses the long-term storage of the power storage device 10 in an inappropriate temperature environment. The information prompting appropriate temperature management is displayed, for example, on the screen of the application of the management system 1. Alternatively, it may be notified by email or the like via the management server 20.

[0079] As described above, according to the management system 1 having the above-described configuration, the power storage device 10 can be stored in a state where it can be immediately used for a long period of time. According to the management system 1, even if the power storage device 10 is stored without being used for a long period of time, problems such as insufficient charge when using the power storage device 10 or frequent charging of the power storage device 10, which increases the management burden on the user, can be effectively suppressed.

[0080] In the long-term storage mode, since the internal power consumption of the power storage device 10 is suppressed by shutting down the device components including the communication module 12 and the control unit 13, a high charge rate can be maintained over a long period. Although the communication function with the power storage device 10 is lost in the long-term storage mode, after a predetermined period has elapsed since the start of the long-term storage mode, the user can receive charge recommendation information, so that the power storage device 10 during long-term storage can be appropriately managed. Furthermore, if the timing for outputting the charge recommendation information, that is, the timing when the charge rate drops and charging is required, is calculated based on the state of the power storage device 10, for example, the degree of deterioration of the power storage device 10, more appropriate management becomes possible.

[0081] Also, when starting the long-term storage mode of the power storage device 10, if the charge rate of the power storage device 10 is low, charging can be promoted, effectively suppressing the long-term storage of the power storage device 10 in a state with a low charge rate. Similarly, when the temperature of the power storage device 10 deviates from an appropriate range, promoting storage at an appropriate temperature can effectively suppress the long-term storage of the power storage device 10 in an inappropriate temperature environment.

[0082] Also, when a management device such as the management server 20 outputs the above charge recommendation information for the first power storage device 10, by also outputting the charge recommendation information for the second power storage device 10 for which the time for charge recommendation is approaching, the user can charge a plurality of power storage devices 10 that require charging together. If information can be received at once for a plurality of power storage devices 10 for which the time for charging is approaching and they can be charged together, the usability is greatly improved. As described above, there may be a plurality of second power storage devices 10.

[0083] In the above-described embodiment, information of the power storage device 10 including information regarding long-term storage is transmitted to the management server 20 via the information terminal 30. In this case, as the communication module 12 of the power storage device 10, a short-range wireless communication module such as BLE with low power consumption can be used, so that the internal power consumption of the power storage device 10 can be reduced.

[0084] By storing information regarding long-term storage of the power storage device 10 in the management server 20 and outputting charge recommendation information from the management server 20, for example, even when the user's smartphone (information terminal 30) is changed during long-term storage, it is possible to send charge recommendation information to the email address or the like registered in the management server 20. That is, the user can receive charge recommendation information with the new smartphone (information terminal 30) without changing the registration information of the management server 20.

[0085] Note that the above-described embodiments can be appropriately modified in design without impairing the object of the present disclosure. FIGS. 10 and 11 show the configurations of the management systems 1X and 1Y which are modification examples of the above-described embodiments.

[0086] The management system 1X illustrated in FIG. 10 is different from the management system 1 in that information regarding long-term storage of the power storage device 10 is configured to be transmitted to the management server 20 without passing through the information terminal 30. On the other hand, the management server 20 is configured to transmit charge recommendation information to the information terminal 30 after a predetermined period has elapsed since the start of the long-term storage mode of the power storage device 10, which is common to the management system 1. Also in this case, similar to the management system 1, the power storage device 10 can be stored for a long period of time in a state where it can be used immediately.

[0087] In the management system 1X, communication between the power storage device 10 and the management server 20 is required. The management server 20 is a server such as the manufacturer or the management company of the power storage device 10 as described above and exists in a place where communication is not possible by short-range wireless communication. In this case, for example, a communication module capable of wide-area communication such as an LTE module, a 4G module, or a 5G module is used for the communication module 12 of the power storage device 10. Also, the power storage device 10 may be equipped with a SIM for data communication.

[0088] The management system 1Y illustrated in FIG. 11 is common with the management system 1 in that information regarding the long-term storage of the power storage device 10 is transmitted to the information terminal 30. On the other hand, it is different from the management system 1 in that information regarding long-term storage is not transmitted to the management server 20. In the management system 1Y, only the information terminal 30 may be used as the management device. In this case, the information terminal 30 stores all information regarding long-term storage by the function of the application of the management system 1Y installed in the information terminal 30, and outputs charge recommendation information after a predetermined period has elapsed since the start of the long-term storage mode.

[0089] Information regarding the long-term storage of the power storage device 10, such as charge recommendation information, is displayed on the monitor 33 of the information terminal 30, and is displayed, for example, as the screen of the application of the management system 1Y. The management system 1Y does not use the management server 20 in the long-term storage process of the power storage device 10, but can store the power storage device 10 in a state where it can be used immediately for a long period, similar to the management systems 1 and 1X.

[0090] Also, in the above-described embodiment, when the state of the power storage device 10 is not an appropriate state, the transition to the long-term storage mode is prohibited, but it is also possible to transition to the long-term storage mode regardless of the state of the power storage device 10. Also in this case, if information prompting the subsequent optimization of the storage state is output, for example, a user who has confirmed the notification screen in FIG. 8 will usually restart the power storage device 10 and charge it to an appropriate charge rate before starting the long-term storage mode. Also, a user who has confirmed the notification screen in FIG. 9 is assumed to store the power storage device 10 in an appropriate temperature environment.

[0091] In the above-described embodiment, when an operation for starting the long-term storage mode is performed, the second information is output to the monitor 33 of the information terminal 30, and the first information is output to the monitor 33 after a predetermined period has elapsed since the start of the long-term storage mode. However, for example, only the first information may be output. Alternatively, only the second information may be output.

Description of Reference Numerals

[0092] 1 Management system, 10 Energy storage device, 11 Battery module, 12 Communication module, 13 Control unit, 14 Case, 15 Handle, 16 Connection part, 16A Terminal, 17 Remaining amount display button, 18 Indicator, 20 Management server, 21, 31 Processor, 22, 32 Memory, 30 Information terminal, 33 Monitor, 40 Charger / discharger, 41 Charge / discharge circuit, 42 Cord, 43 Outlet, 44 Positive terminal, 45 Negative terminal, 46 Detection terminal

Claims

1. A power storage device including a communication module, A management device capable of wireless communication with the power storage device, Comprising, The power storage device has a long-term storage mode for shutting down device constituent devices, The management device is configured to output second information related to long-term storage of the power storage device when an operation for starting the long-term storage mode is performed, and when the charge rate of the power storage device at the time of the operation is less than a predetermined threshold value, as the second information, output information for promoting charging of the power storage device, or when the charge rate of the power storage device at the time of the operation is less than a predetermined threshold value, prohibit transition to the long-term storage mode, a management system for a power storage device.

2. The management device is configured to output first information related to long-term storage of the power storage device after a predetermined period has elapsed since the start of the long-term storage mode. The management system for a power storage device according to Claim 1.

3. The management device outputs, as the first information, information for promoting charging of the power storage device. The management system for a power storage device according to Claim 2.

4. The management device calculates a recommended next charging date of the power storage device based on the start date of the long-term storage mode, and outputs, as the second information, information on the recommended next charging date. The management system for a power storage device according to any one of Claims 1 to 3.

5. The management device calculates the predetermined period based on the state of the power storage device at the start time of the long-term storage mode. The management system for a power storage device according to Claim 2 or 3.

6. When the temperature of the power storage device when an operation for starting the long-term storage mode is performed is outside a predetermined threshold range, the management device outputs, as the second information, information for promoting storage at an appropriate temperature. The management system for a power storage device according to any one of Claims 1 to 5.

7. The power storage device includes a first power storage device and a second power storage device, When the management device outputs the first information about the first power storage device, if the remaining period until the predetermined period related to the second power storage device has elapsed is less than a predetermined threshold value, the management device also outputs the first information about the second power storage device. The management system for a power storage device according to Claim 2.

8. The management device is an information terminal and a management server, The management server acquires start information of the long-term storage mode via the information terminal and outputs the predetermined information to the information terminal. The power storage device management system according to any one of claims 1 to 7.

9. The management device is a management server, The management server outputs the predetermined information to a pre-registered information terminal. The power storage device management system according to any one of claims 1 to 7.

10. The management device is an information terminal having a monitor, The information terminal outputs the predetermined information to the monitor. The power storage device management system according to any one of claims 1 to 7.

11. A charger including a detection terminal for detecting the power storage device is provided, When the power storage device is connected to the charger, the power storage device returns from the long-term storage mode triggered by current flowing through the detection terminal. The power storage device management system according to any one of claims 1 to 10.

12. The communication module of the power storage device is a BLE (Bluetooth (registered trademark) Low Energy) module. The power storage device management system according to any one of claims 1 to 11.

13. A method for managing a power storage device including a communication module and having a long-term storage mode for shutting down device configuration devices, When an operation for starting the long-term storage mode is performed, if the charge rate of the power storage device is less than a predetermined threshold, as information related to long-term storage of the power storage device, information for promoting charging of the power storage device is output, or when the charge rate of the power storage device at the time of the operation is less than a predetermined threshold, migration to the long-term storage mode is prohibited. A method for managing a power storage device.

Images