JP2006202660A - Secondary battery control system and secondary battery control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a secondary battery control system controlling a secondary battery to efficiently utilize it and to provide a secondary battery control method. <P>SOLUTION: The secondary battery control system is equipped with a plurality of connecting terminals 29 electrically connecting secondary batteries, a commercial power source 2 and a solar cell power source 3 for charging each secondary battery connected to the connecting terminals 29, a charging amount detecting part 24 detecting charging amounts of the secondary batteries connected to the connecting terminals 29, and a control part 25 storing information on the secured number of the secondary batteries secured in a charged state or information relating to the secured number, acquiring the necessary secured number based on the information, and determining whether the charging of the discharged secondary batteries connected to the connecting terminals are necessary or not based on the acquired necessary secured number and the charging amount of each secondary battery. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to management of a so-called secondary battery that can be charged, and more particularly, to a secondary battery management system and a secondary battery management method for managing a secondary battery used as a power source of an electric vehicle.

Currently, concerns about the exhaustion of petroleum resources are accelerating, and it is highly likely that automakers will make major structural reforms to shift away from gasoline.
Further, for example, reducing the total emission level of carbon dioxide emitted due to the environmental load with respect to the environmental load (for example, automobiles) used for physical distribution is becoming an image strategy for environmental contribution for companies.
For these reasons, electric vehicles using a secondary battery as a power source have been developed and provided.

As a secondary battery used in such an electric vehicle, a secondary battery using lithium ions having a total voltage of 355 V and a total capacity of 95 Ah is provided.
Here, the secondary battery of an electric vehicle has a feature that the remaining capacity of the charge amount decreases due to the discharge according to the travel distance. The discharged secondary battery requires a certain amount of charging time for charging. For this reason, unlike a gasoline vehicle, an electric vehicle cannot run while charging a secondary battery.

  In response to this charging problem, there has been proposed an electric vehicle battery management system that allows a secondary battery having a small remaining capacity and a charged secondary battery to be exchanged at a station (Patent Literature). 1).

  However, a charged secondary battery has a characteristic of spontaneous discharge over time. For this reason, when the charged secondary battery is kept on standby for a long time at the station, there is a problem that the amount of charge can be insufficient as the secondary battery provided to the electric vehicle due to natural discharge during that time.

JP 2001-57711 A

  In view of the above problems, an object of the present invention is to provide a secondary battery management system and a secondary battery management method for managing a secondary battery so that the secondary battery can be used efficiently.

  The present invention provides a plurality of connection means for electrically connecting secondary batteries, power supply means for charging each secondary battery connected to the connection means, and charging of each secondary battery connected to the connection means Stores information on the number of secured secondary batteries to be secured in a charged state or information related to the secured number, and obtains and obtains the necessary secured number based on the information. A secondary battery comprising: control means for determining whether or not it is necessary to charge the discharged secondary battery connected to the connection means based on the necessary number of reserved pieces and the charge amount of each secondary battery It is a management system and a secondary battery management method.

  As an aspect of the present invention, the reserved number is one of a preset one of an equipment application for supplying power to facility equipment through the connection means and an electric vehicle application for supplying electric power to the electric vehicle separated from the connection means. It is configured by the number of charged secondary batteries reserved for use, and the control means is necessary for the one application based on the required reserved number and the charge amount of each secondary battery. It is determined whether or not the secondary battery can be secured, and the secondary battery remaining when it is determined that the secondary battery can be secured can be used for the other application.

  Further, as an aspect of the present invention, the determination as to whether or not a secondary battery necessary for the one application can be secured is a first determination, and the control means can provide the remaining secondary battery for the other application. A secondary battery that has been determined to be able to be provided for the other application can be used for the other application.

  Further, as an aspect of the present invention, the control means determines in the first determination that the charge amount of one secondary battery unit is greater than or equal to the first individual charge amount, and the second determination And determining that the charge amount of one secondary battery unit is equal to or greater than the second individual charge amount, and setting the first individual charge amount and the second individual charge amount to different charge amounts. can do.

  Further, as an aspect of the present invention, the reserved number is configured by information of the number corresponding to each time period, and the control means is configured to correspond to the necessary time period corresponding to a current time period or a time period required for charging from the present time. The reserved number can be acquired.

  By this invention, a secondary battery can be managed appropriately and can be used efficiently.

An embodiment of the present invention will be described below with reference to the drawings.
In the present embodiment, a secondary battery management device in a facility charges a plurality of secondary batteries, manages the charging status of each secondary battery, and provides the secondary battery that has been charged to an electric vehicle or the like. The present invention relates to a secondary battery management system.

  In each embodiment described below, a case where a secondary battery discharged by an electric vehicle and a charged secondary battery are exchanged will be described. In this case, the facility functions as a secondary battery exchange station. Thereby, the secondary battery in a facility is kept at a fixed number, and management of the secondary battery is facilitated.

  A first embodiment of the secondary battery management system of the present invention will be described. In the first embodiment, the secondary battery management device in the facility efficiently charges the secondary battery, and the charged secondary battery is provided to the electric vehicle.

FIG. 1 is a system configuration diagram showing a system configuration of the secondary battery management system 1.
The secondary battery management system 1 includes a power source, a secondary battery management device 10, a secondary battery 30, and an electric vehicle 9. The power source and the secondary battery management device 10 are provided in the facility 7. A plurality of secondary batteries 30 are provided, and each is connected to the secondary battery management device 10 or the electric vehicle 9.

The power source includes, for example, a commercial power source 2 and a power source 3 by solar power generation. The commercial power source 2 is a commercial AC power source that stably supplies power. The power source 3 by solar power generation is a power source to which power is supplied by solar power generation.
In addition, since the power supply 3 by photovoltaic power generation has a fluctuation | variation in the electric power generation amount by sunlight, the stable electric power is not obtained, but the secondary battery 30 can be charged also with the electric power of the power supply 3 by this solar power generation. This can save energy. The power source 3 is configured by solar power generation in the present embodiment, but is configured by other power generation devices using natural energy such as wind power generation or solar power generation and wind power generation. Also good.

  A plurality of secondary batteries 30 are connected to the secondary battery management device 10 in a chargeable manner. One secondary battery 30 is connected to the electric vehicle 9 so that it can be discharged. The electric vehicle 9 may be configured to connect a plurality of secondary batteries 30.

  With the above system configuration, the secondary battery 30 discharged by the traveling of the electric vehicle 9 and the secondary battery 30 in the facility 7 charged by the secondary battery management device 10 can be exchanged.

Next, the electrical configuration of the secondary battery management system 1 will be described.
FIG. 2 is a block diagram showing an electrical configuration of the secondary battery management system 1.
The secondary battery management device 10 is connected with a commercial power source 2 and a power source 3 by solar power generation. A secondary battery 30 serving as a power source for traveling is electrically connected to the electric vehicle 9.

The secondary battery management device 10 includes a plurality of lock devices 21, attachment / detachment detection sensors 22, switches 23, charge amount detection units 24 as detection means, and connection terminals 29 corresponding to the respective secondary batteries 30 to be connected. Further, a control unit (control means) 25 for controlling these is provided.
Here, the lock device 21, the attachment / detachment detection sensor 22, the switch 23, the charge amount detection unit 24, the control unit 25, and the connection terminal 29 constitute a charge / discharge unit 20.
The charge / discharge unit 20 charges a plurality of secondary batteries 30 that are electrically connected via the connection terminals 29. In the first embodiment, the charging / discharging unit 20 is used for charging the secondary battery 30, and the charging / discharging unit 20 does not discharge the secondary battery 30.
A secondary battery 30 is detachably connected to the connection terminal 29. For this reason, as shown by a dotted line in FIG. 2, the secondary battery 30 connected to the connection terminal 29 and the secondary battery 30 of the electric vehicle 9 can be exchanged.

  The lock device 21 is driven by a control signal received from the control unit 25 to lock the secondary battery 30 connected to the connection terminal 29 of the charging / discharging unit 20 and to unlock it. Switch state to state. Thereby, it is possible to prevent the secondary battery 30 being charged and uncharged from being removed from the connection terminal 29.

The attachment / detachment detection sensor 22 is a switch sensor that detects whether the secondary battery 30 is attached to or removed from the connection terminal 29 of the charging / discharging unit 20 by turning on / off the sensor terminal, and detects the detected signal. It transmits to the control part 25. This makes it possible to detect that the charged secondary battery 30 has been removed from the connection terminal 29 and to detect that the secondary battery 30 that needs to be charged is attached to the connection terminal 29.
In this embodiment, the attachment / detachment detection sensor 22 is a switch sensor using a sensor terminal. However, the present invention is not limited to this configuration.

The switch 23 switches the electrical connection between the secondary battery 30 and the power source (the commercial power source 2 and the power source 3 by solar power generation) to ON or OFF according to the control signal received from the control unit 25.
Thereby, when the charge amount of the secondary battery 30 becomes a sufficient charge amount to provide to the electric vehicle 9, the electrical connection between the secondary battery 30 and the power source can be turned off. The overcharge of the secondary battery 30 can be prevented.
The switch 23 may be turned off when the removal of the secondary battery 30 is permitted. Alternatively, the switch may be turned off when charging of the secondary battery 30 is completed.

  The charge amount detection unit 24 is provided between the switch 23 at the rear stage of the connection terminal 29 and the power source (the commercial power source 2 and the power source 3 by solar power generation), and the charge amount of the secondary battery 30 (charged) ) And transmits the detected charge amount to the control unit 25 as a detection signal.

The control unit 25 is composed of, for example, a microcomputer, receives detection signals from the attachment / detachment detection sensor 22 and the charge amount detection unit 24, transmits the control signal to the lock device 21 and the switch 23, and then receives the lock device 21 and the switch. 23 operations are controlled.
The control unit 25 is provided with a storage unit, and data and programs for managing the secondary battery 30 are stored in the storage unit. As data for managing the secondary battery 30, for example, charge amount management data, reserved number management data, replacement history data, inspection time data, charging required time data, and the like are stored in the storage unit.

The charge amount management data includes, for example, each item (field) of connection terminal number, detected charge amount, replacement date / time, charge start date / time, and charge completion date / time. It is remembered.
In the connection terminal number, a number assigned to each connection terminal 29 on a one-to-one basis is stored.
The detected charge amount stores the latest charge amount detected by the charge amount detection unit 24 as the current charge amount of each secondary battery 30.
The replacement date / time indicates that the secondary battery 30 connected to the connection terminal 29 has been replaced, and that the secondary battery 30 that has been discharged at the time of replacement is connected to the connection terminal 29. The date and time detected at is stored.
The date and time when charging of the secondary battery 30 is started is stored in the charging start date and time. If charging has not started yet, 0 (or space) is stored. The date and time when charging of the secondary battery 30 is completed is stored in the charging completion date and time. If charging is not yet completed, 0 (or space) is stored.
Based on the charge amount management data, the control unit 25 can individually manage the charging state of the secondary battery 30 connected to each connection terminal 29.

The reserved number management data includes, for example, each item (field) of the day of the week and the reserved number, and a plurality of data is stored in units of rows (record units).
As the day of the week, Monday to Saturday, day / holiday day classification is stored. The secured number stores how many secondary batteries 30 that have been charged need to be secured for each day segment.
With this secured number management data, it is possible to manage for each day of the week how many secondary batteries 30 to be provided to the electric vehicle 9 should be charged.

The exchange history data includes, for example, each item (field) of exchange date / time, exchange day of the week, and connection terminal number, and a plurality of data is stored in units of rows (record units).
The date and time when the secondary battery 30 was replaced is stored in the replacement date and time. In the replacement day, the day of the week when the secondary battery 30 is replaced is stored. In the connection terminal number, the number of the connection terminal 29 in which the secondary battery 30 has been replaced is stored.
With this replacement history data, the history of replacement of the secondary battery 30 can be stored in time series.

  The inspection time data includes time data indicating an inspection interval such as every 10 minutes or every 30 minutes, or time data indicating an inspection time such as 9:00, 12:00, and 18:00. Based on the inspection time data, the control unit 25 can periodically confirm whether or not the secondary battery 30 needs to be charged.

  The required charging time data is data indicating the time required from the start of charging of the discharged secondary battery 30 to the completion thereof, and is configured by a fixed time such as 4 hours or 8 hours, for example. When the control unit 25 determines whether or not the secondary battery 30 needs to be charged based on the required charging time data, the time required for charging the secondary battery 30 can be taken into consideration. The required charging time data was obtained by calculating the time required for charging each secondary battery 30 in consideration of the amount of charge remaining in each secondary battery 30 before the start of charging. You may comprise by the individual charge required time.

In the present embodiment, the control unit 25 is configured integrally with the charge / discharge unit 20, but is configured by separately connecting a computer to the secondary battery management device 10 and providing the computer with a control function. May be.
Further, it is desirable that the storage unit provided in the control unit 25 can update and save data such as a rewritable nonvolatile memory.

Next, operation | movement of the control part 25 of the secondary battery management system 1 is demonstrated.
FIG. 3 is a flowchart showing the operation of the control unit 25 of the secondary battery management system 1.

The control unit 25 always confirms whether a detection signal is received from the attachment / detachment detection sensor 22 (step S1). Thereby, it is always detected whether or not the secondary battery 30 is attached / detached for each connection terminal 29.
If the secondary battery 30 is removed and a new secondary battery 30 is attached, that is, if the secondary battery 30 is replaced (Step S2: Yes), the control unit 25 stores the charge amount stored in the storage unit. Of the management data, the current date and time are stored in the exchange date and time of the corresponding connection terminal number (step S3). At the same time, 0 (or space) is stored in the charging start date and time and the charging completion date and time of the corresponding connection terminal number, and data clear (initialization) is performed.
If the secondary battery 30 has not been replaced (step S2: No), the process returns to step S1 until a predetermined inspection time has elapsed (step S4: No).

When the inspection time has elapsed (step S4: Yes) or after step S3, the control unit 25 reads the required charging time data from the storage unit (step S5).
Then, referring to the replacement history data, the control unit 25 calculates a predicted value of how many secondary batteries 30 will be replaced from the current time until the required charging time elapses based on the replacement history data. (Step S6).

  The control unit 25 refers to the data of the same day of the week as the current day of the replacement history data, and replaces the secondary battery 30 within the range from the same time as the current time to the time when the required charging time has elapsed. The number of exchanges is extracted on a weekly basis, the average value of the exchange numbers in the corresponding time zone of each week is calculated, and this average value is used as the predicted value.

In the next step S7, the number of secondary batteries 30 predicted to be provided to the electric vehicle 9 when the required charging time has elapsed from the present time satisfies the secured number stored in the secured number management data. It is judged by the control part 25 whether it can do (step S7).
The control unit 25 refers to the charge amount management data, adds the number of secondary batteries 30 that have been charged and the number of secondary batteries 30 that are currently being charged, and based on this value, the predicted value obtained in step S6 When the value obtained by subtracting is equal to or larger than the number of reserved number management data, it is determined that the reserved number can be satisfied.

  If the secured number can be satisfied (step S7: Yes), the process returns to step S1. If the secured number cannot be satisfied (step S7: No), charging is started for the insufficient number of secondary batteries 30 among the secondary batteries 30 that have not yet started charging (step S8).

The controller 25 updates the charge amount management data (step S9), returns the process to step S1, and repeats a series of operations.
In the update in step S9, the current date and time are stored in the charge start date and time of the corresponding connection terminal number in the charge amount management data.

With the above operation, the secondary battery management system 1 can charge the secondary battery 30 as much as necessary according to the day of the week, and the secondary battery 30 is charged more than necessary, and the charged secondary battery is charged. It is possible to prevent the battery 30 from waiting for a long time. Therefore, the utilization efficiency of the secondary battery 30 is improved, and waste of electric power due to spontaneous discharge or recharging of the secondary battery 30 can be prevented.
Thereby, the operating cost in the facility 7 can be reduced, the installation of the secondary battery management system 1 can be promoted, and the facility 7 can be increased.

The driver of the electric vehicle 9 can use the facility 7 as a replacement station for the secondary battery 30. That is, when the charge amount of the secondary battery 30 mounted on the electric vehicle 9 is reduced due to the discharge, the discharged secondary battery 30 mounted is replaced with the charged secondary battery of the facility 7. 30 can be replaced and power can be replenished immediately.
Therefore, the driver of the electric vehicle 9 does not need to wait until the charging is completed, and the electric vehicle 9 can be run immediately after the secondary battery 30 is replaced, and the convenience is greatly improved.

In addition, it is good also as a structure which the control part 25 switches the switch 23 to OFF, when the charge of the secondary battery 30 is completed.
In this case, overcharging can be prevented and the amount of power used for charging can be suppressed.

Further, when the secondary battery 30 connected to the secondary battery management device 10 is provided to the electric vehicle 9, the control unit 25 refers to the charge completion date and time of the charge amount management data, and the second battery that has been charged first. It is good also as a structure provided in order from the secondary battery 30. FIG.
In this case, since the secondary battery 30 that has been charged can be prevented from waiting for a long period of time, it is possible to prevent the amount of charge from being reduced during provision due to spontaneous discharge of the secondary battery 30.

Alternatively, when charging of the secondary battery 30 is started, the control unit 25 may refer to the replacement date and time of the charge amount management data and sequentially charge the secondary battery 30 that has been replaced first.
In this case, it is possible to prevent the secondary battery 30 from being left for a long time in a completely discharged state. For this reason, any secondary battery 30 can be used evenly, and the lifetime of the secondary battery 30 can be averaged.
In this case, for example, if a nickel-cadmium battery is used as the secondary battery 30, it is possible to prevent a decrease in the amount of charge due to a memory phenomenon.

Further, whether or not to start charging is determined by predicting the situation at the time when the required charging time has elapsed from the current time. However, whether or not the number of secondary batteries 30 at the current time satisfies the secured number. It is good also as a structure judged by.
In this case, when setting the secured number, it is desirable to set a larger secured number in consideration of the fact that the number of charged secondary batteries 30 held in the facility is reduced by replacement.

  A second embodiment of the secondary battery management system of the present invention will be described. In the second embodiment, the secondary battery management device in the facility charges a plurality of secondary batteries, and not only provides the charged secondary battery to the electric vehicle but also utilizes the equipment load in the facility. It is.

FIG. 4 shows a system configuration of the secondary battery management system 1.
The secondary battery management system 1 is provided with an equipment load 8 in addition to the components of the first embodiment described above.

  The equipment load 8 is configured by a computer such as a Web server and a DB server (database server), for example. The equipment load 8 is not limited to a Web server or DB server, but is an electric device that operates by receiving power supply from a power source (commercial power source 2 and power source 3 by solar power generation), and it is necessary to prevent instantaneous interruption. It is good to comprise with an electrical device with.

The secondary battery management device 10 of the second embodiment has a partially different configuration from the first embodiment described above, and this different portion will be described next.
FIG. 5 is a block diagram showing a configuration of the secondary battery management system 1.
In the secondary battery management system 10 of the secondary battery management system 1, a commercial power source 2 and a power source 3 by photovoltaic power generation are connected to the input side, and unlike the first embodiment, an equipment load 8 is provided on the output side. It is connected. The commercial power source 2 and the solar power source 3 are the same as those in the first embodiment.
The secondary battery management device 10 includes a bypass circuit 4, ACSW 5, and an inverter 6 in addition to the same charging / discharging unit 20 as that in the first embodiment. In addition, the secondary battery management apparatus 10 in this Embodiment comprises the parallel processing system uninterruptible power supply device by this circuit structure.

The bypass circuit 4 is a circuit that bypasses the charging / discharging unit 20 so as not to be energized when directly energizing the facility load 8 from the commercial power source 2 and the power source 3 by photovoltaic power generation.
The ACSW 5 is an AC switching circuit that functions as a switching circuit between the commercial power source 2 and the solar power source 3 and the charging / discharging unit 20.
The inverter 6 converts AC voltage from the commercial power source 2 and the power source 3 by photovoltaic power generation into DC voltage and supplies power to the charging / discharging unit 20. The DC voltage from the charging / discharging unit 20 is converted to AC voltage and installed. Power is supplied to the load 8.
The configuration of the charging / discharging unit 20 is the same as the charging / discharging unit 20 of the first embodiment described with reference to FIG. 2, but the data and program stored in the storage unit provided in the control unit 25 are the first. Different from the embodiment.
In the storage unit, for example, secondary battery management data, secured number management data, inspection time data, secured number data, and the like are stored as data for managing the secondary battery.

The charge amount management data includes, for example, connection terminal numbers, detected charge amounts, replacement date / time, and usage items (fields), and a plurality of data is stored in units of rows (record units).
Since the connection terminal number, the detected charge amount, and the replacement date and time are the same items as the charge amount management data of the first embodiment and the same data is stored, detailed description thereof is omitted.
In the usage of the charge amount management data, either the secondary battery 30 is provided to the electric vehicle 9 or the equipment load 8 is stored.
In the present embodiment, there are two uses for electric vehicles and equipment loads. However, a configuration may be adopted in which a plurality of uses are set and each secondary battery 30 is distributed to each use.

The secured number data stores the number of secondary batteries 30 with a sufficient charge amount (for example, 100%) to be provided to the electric vehicle 9 and the number of the rechargeable batteries.
Since the secured number management data and the inspection time data are the same as the secured number management data and the inspection time data of the first embodiment, detailed description thereof will be omitted.

Next, operation | movement of the control part 25 of the secondary battery management system 1 is demonstrated.
FIG. 6 is a flowchart showing the operation of the control unit 25 of the secondary battery management system 1.

The controller 25 always checks whether a detection signal is received from the attachment / detachment detection sensor 22. Thereby, it is always detected whether the secondary battery 30 was replaced | exchanged about each connection terminal 29 (step S11).
When it is detected that the secondary battery 30 has been replaced and the replacement is completed, that is, when the sensor terminal of the attachment / detachment detection sensor 22 is once turned off and then turned on (step S12: Yes), The control part 25 starts charge of the secondary battery 30 newly connected by this exchange (step S13).
If the secondary battery 30 has not been replaced (step S12: No), the process returns to step S11 until a predetermined inspection time elapses (step S14: No).

  When the inspection time has elapsed (step S14: Yes) or after step S13, the control unit 25 determines whether or not there is a reserved number of secondary batteries 30 for the electric vehicle (step S15). That is, the control unit 25 refers to the secondary battery management data and the reserved number management management data, and extracts the number of secondary batteries 30 that have a sufficient charge (for example, 100%) and have an application of “electric vehicle”. The number (charged number) is compared with the secured number, and when the charged number is equal to or larger than the secured number, it is determined that there is a secured number of secondary batteries 30 for the electric vehicle.

  If the number of secondary batteries 30 for the electric vehicle is secured (step S15: Yes), the control unit 25 uses the secondary battery management data for the connection terminal number of the connection terminal 29 determined to be replaced in step S12. Is stored as “equipment load” (step S16), and the process returns to step S11.

  If there is not a sufficient number of secondary batteries 30 for the electric vehicle (Step S15: No), the connection terminal number of the connection terminal 29 determined to be replaced in Step S12 is “Electric Vehicle” in the application item of the secondary battery management data. Is updated (step S17), and the process returns to step S11.

With the above operation, the required number of secondary batteries 30 to be provided to the electric vehicle 9 can be secured, and the remaining secondary batteries 30 can be used for power supply to the equipment load 8.
In the facility 7, when the power supply from the commercial power source 2 and the photovoltaic power source 3 is interrupted due to a power failure or sunset, the secondary battery stored as “equipment load” in the usage item of the secondary battery management data Electric power can be supplied from 30 (that is, the secondary battery 30 permitted to be used for facilities) to the equipment load 8 without interruption.

  The time during which power can be supplied from the secondary battery 30 to the equipment load 8 increases as the number of secondary batteries 30 allocated for the equipment load increases. Therefore, the secondary battery 30 can be used effectively.

  In the facility 7, since the charged secondary battery 30 can be used not only for the electric vehicle 9 but also for the facility load 8 of the facility 7, the cost performance is increased. For this reason, introduction of the secondary battery management system 1 can be promoted, and facilities 7 can be increased.

In addition, although the charge amount required to provide the secondary battery 30 to the electric vehicle 9 is 100%, it may be configured with other charge amounts such as 80%.
In this case, the charge amount of the secondary battery 30 necessary for providing for the facility may be set and set higher than the charge amount of the secondary battery 30 for the electric vehicle.

In addition, as an equipment application that uses the secondary battery 30 in the equipment 7, an application as an uninterruptible power supply (so-called UPS) that prevents instantaneous interruption of power supply to the equipment load 8 has been set. May be set to other uses, such as setting to an application that cuts the power usage fee to reduce the power usage fee, or setting to both applications.
Even in this case, the secondary battery 30 can be used for both the electric vehicle 9 and the equipment load 8, and the secondary battery 30 can be used efficiently.

A third embodiment of the secondary battery management system of the present invention will be described. In the third embodiment, the secondary battery management device in the facility charges a plurality of secondary batteries, uses the charged secondary batteries as facility loads in the facility, and uses the surplus secondary batteries for electric vehicle applications. Provide and utilize secondary batteries.
Unlike the second embodiment described above, not only the amount of charge required to provide the secondary battery to the electric vehicle, but also the amount of charge required to use the secondary battery at the facility is set. The secondary battery can be used more efficiently by changing the amount of charge required for the battery.

  The secondary battery management system 1 of the third embodiment has the same configuration as the secondary battery management system 1 of the second embodiment, and data and programs stored in a storage unit provided in the control unit 25 are stored in the storage unit. Different. This different part will be described next.

  The storage unit provided in the control unit 25 stores, as data for managing the secondary battery, for example, charging state management data, facility reserved power amount management data, replacement required charge amount management data, and the like. ing.

The charge state management data includes, for example, each item (field) of a connection terminal number, a charge state, and an update date and time, and a plurality of data is stored in units of rows (record units).
The connection terminal number stores the same data as in the first embodiment, and therefore detailed description thereof is omitted.
Each state set as shown below is stored in the state of charge according to the amount of charge of the secondary battery 30 connected to the connection terminal 29.
“No connection”: Indicates that the secondary battery 30 is not connected.
“First level or lower”: Indicates that the amount of charge of the connected secondary battery 30 is less than the first level.
“First level charging completed”: Indicates that the amount of charge of the connected secondary battery 30 is not less than the first level and less than the second level.
“Second level charging completed”: Indicates that the amount of charge of the connected secondary battery 30 has reached the second level.
“Exchangeable”: Indicates that the amount of charge of the connected secondary battery 30 has reached the second level and is set to be removable.
In the present embodiment, the first level is set so that charging of the secondary battery 30 is 80% complete. This is around the transition point where the state of rapid charging is changed from “first level or lower” to the state of charging speed being “first level charging completed” due to the characteristics of the lithium ion battery. The first level is not limited to this, and can be set to an appropriate charge amount.
Moreover, in this Embodiment, although the 2nd level is set to the charge of the secondary battery 30 being 100% completed, it can set to not only this but appropriate charge amount.
The date and time when the state of charge was updated is stored in the update date and time.
This update date / time makes it possible to specify the time when the state of charge has shifted from “second level charge completion” to “replaceable”, that is, the time when the connection of the switch 23 is turned off as being removable.
Thus, when the secondary battery 30 is provided for replacement, the secondary battery 30 can be provided in order from the secondary battery 30 that has been previously turned off. Therefore, it is possible to prevent the secondary battery 30 from being provided for replacement for a long period after the connection is turned off, and the secondary battery 30 to be spontaneously discharged during that period.

The secured energy management data for facilities is composed of, for example, each item (field) of the initial period, the final period, the required individual charge amount as the first individual charge amount, and the reserved number. Unit).
At the start and end, the period for applying each data is stored.
The individual required charge amount stores how much one secondary battery 30 needs to be charged (for example, 80%) in order to use the secondary battery 30 for facility use.
In this embodiment, the individual charge amount is set to one unit of the secondary battery 30 in order to allow the secondary battery 30 to be attached and detached one by one. When the secondary battery 30 is made detachable as a set, the configuration may be such that a necessary charge amount is stored in units of sets.
The reserved number stores the number of secondary batteries 30 (or a set of secondary batteries 30) that need to be charged to satisfy the individual charge amount in order to use the secondary battery 30 for facility use. Is done.
With this secured power management data for facilities, it is possible to secure as many secondary batteries 30 as required for facilities that satisfy the required charge for facilities.
In addition, although it was set as the structure which each sets an individual required charge amount and securing number for every period (start period and end period), it is good also as a structure which sets one regardless of a time.
Moreover, it is good also as a structure which always measures the electric energy currently used with an installation, determines the tendency of the electric energy used by a day of the week and a day by this, and calculates an individual required charge amount and the number of reservations based on this tendency .

The replacement required charge amount management data includes, for example, items to be provided for the secondary battery 30 and items (fields) of the individual required charge amount as the second individual charge amount.
In the target, the name of the target (for example, for an electric vehicle) that provides the secondary battery 30 for replacement is stored.
The individual required charge amount stores how much one secondary battery 30 needs to be charged (for example, 100%) in order to provide the secondary battery 30 to the target.

Next, operation | movement of the control part 25 of the secondary battery management system 1 is demonstrated.
FIG. 7 is a flowchart showing the operation of the control unit 25 of the secondary battery management system 1.

  The control part 25 detects each charge amount of each secondary battery 30 connected to the connection terminal 29 in which the switch 23 is ON by each charge amount detection part 24 (step S21).

The control unit 25 confirms the detected charge amount of each secondary battery 30, and the secondary battery 30 that has been charged to the first level in the current detection is less than or equal to the first level in the previous detection. It is determined whether or not there is an increase in the number of secondary batteries 30 that have been charged to the first level.
In this determination, the number of secondary batteries 30 detected as being charged to the first level is the number of secondary batteries 30 whose charge state is stored as “first level charge complete” in the charge state management data. This is performed depending on whether or not the number has increased (step S22).

  If the number of secondary batteries 30 that have been fully charged up to the first level has increased (step S22: Yes), the secondary battery 30 that has newly completed the first level charge in the charge state management data. The state of charge is updated to “completion of first level charge” (step S23).

  Next, whether the number of secondary batteries 30 whose charge amount is equal to or higher than the first level is greater than the required number required for the equipment load 8 with reference to the reserved number of reserved power management data for equipment. Is determined (first determination) by the control unit 25 (step S24). The control unit 25 refers to the secured number of records corresponding to the current date and time by referring to the start and end of a plurality of records in which each data is stored when referring to the secured power management data for facilities. .

  If the number of secondary batteries 30 whose charge amount is equal to or higher than the first level is larger than the reserved number of facilities 7 (step S24: Yes), the process proceeds to the next step S25, and if it is equal to or less than the reserved number (step S24). : No), the process is returned to step S21.

  In step S25, the control unit 25 determines whether there is a secondary battery 30 that has been fully charged up to the second level among the secondary batteries 30 that are set to be used at the equipment load 8 (second). (Step S25).

Here, in the present embodiment, the secondary battery 30 that is set to be used with the equipment load 9 has a charge state of the charge state management data that is either “first level charge complete” or “second level charge complete”. This corresponds to the secondary battery 30 in the state of. Thereby, about the secondary battery 30 which is not charged to the 1st charge level, it is set as the structure charged continuously, without performing replacement | exchange and discharge.
In addition, when using the secondary battery 30 with the equipment load 9, it is good also as a structure which discharges all the secondary batteries 30 other than the secondary battery 30 whose charge condition is "replaceable."

If there is no secondary battery 30 that has been charged to the second level in step S25 (step S25: No), the process returns to step S21.
When there is a secondary battery 30 that has been charged to the second level (step S25: Yes), the switch 23 of the connection terminal number to which the corresponding secondary battery 30 is connected is turned OFF, and the circuit Disconnect (step S26).
As a result, the separated secondary battery 30 is not charged and discharged for equipment, and waits for replacement.
The control unit 25 updates the state of charge of the connection terminal number with the switch turned OFF to “replaceable” (step S27). At this time, the lock device 21 corresponding to the connection terminal number is unlocked, and the process proceeds to step S21. Return to and repeat the series of processing. By releasing the lock, the secondary battery 30 waiting for replacement can be removed at any time.

  Note that the lock release timing may be set to another timing. For example, when a replacement is requested from an appropriate input device (touch panel, communication device, etc.), if there is a secondary battery 30 whose charge state is “replaceable”, the lock is released and the secondary battery 30 is released. The battery 30 can be provided for an electric vehicle, and the output device (display device, communication device, or the like) can output the information that cannot be provided without it.

  If the number of secondary batteries 30 that have been charged to the first level has not increased in step S22 (step S22: No), the number of secondary batteries 30 that have been charged to the second level has increased. It is determined (second determination) by the control unit 25 (step S28).

If the number of secondary batteries 30 that have been charged up to the second level has not increased (step S28: No), the process returns to step S21.
When the number of secondary batteries 30 that have been charged up to the second level has increased (step S28: Yes), the number of secondary batteries 30 whose charge amount is equal to or higher than the first level is equal to the equipment load 8. It is determined whether or not the number is larger than the necessary number (step S29). Here, when referring to the secured power management data for facilities, the number of records to which the current date corresponds is referred with reference to the start and end.
If the number of secondary batteries 30 whose charge amount is equal to or higher than the first level is greater than the secured number (step S29: Yes), the process proceeds to step S26 described above. In the case of reaching Yes in step S29, the number of secondary batteries 30 that can be used for the equipment load 8, that is, the secondary batteries 30 that have a charge amount equal to or higher than the first level, are more than the number secured at the time of the previous detection. In this case, the charge level of some of the secondary batteries 30 among them reaches the second level.
When the number of secondary batteries 30 whose charge amount is equal to or higher than the first level is equal to or less than the secured number (step S29: No), the process returns to step S21.

With the above operation, the secondary battery 30 necessary for the equipment load 8 can be secured, and the surplus secondary battery 30 can be provided to the electric vehicle 9 on the secondary battery 30.
Thereby, a plurality of secondary batteries 30 can be managed and operated in the facility 7, and a part of the secondary batteries 30 can be provided to the electric vehicle 9.

  Conventionally, if the facility 7 tries to protect its own equipment load 8 from a momentary interruption, the installation cost and the operation cost of the uninterruptible power supply are increasing, and there is nothing to supplement this cost. However, the secondary battery management system 1 of the present embodiment can provide the surplus secondary battery 30 to the electric vehicle 9 and collect a fee from the driver of the electric vehicle 9 at the time of the provision. Since it becomes possible, the installation cost and operation cost of the secondary battery management system 1 can be supplemented with the said charge. Therefore, introduction of the secondary battery management system 1 can be promoted.

  In addition, for the electric vehicle 9 that needs to be charged at 100% at the second level, the secondary battery 30 used at the facility load 8 of the facility 7 is set to have a charge amount of 80% or more of the first level. ing. For this reason, the secondary battery 30 can be utilized efficiently.

More specifically, as shown in the graph of FIG. 8, the secondary battery 30 is rapidly charged up to about 80% at time t1, and after about 80%, it is slowly charged until time t2 when it is charged 100%. It has a charging characteristic of being charged.
Therefore, even if the secondary battery 30 that has been fully charged up to the second level is provided to the electric vehicle 9, the secondary battery 30 that is empty or has a small remaining charge amount is received from the electric vehicle 9, and the secondary battery 30 is charged. It can be charged in a short time to the first level that can be used at the facility 7.

When the secondary batteries 30 are charged to the first level in this way, the number of secondary batteries 30 that can be used at the facility 7 for preventing instantaneous interruption increases.
Further, the secondary battery 30 that has started charging earlier than the first level while being charged to the first level may have been charged to the second level. At this time, if the number of secondary batteries 30 charged to the first level or higher is larger than the number of secondary batteries 30 required for the facility 7, the secondary battery 30 charged to the second level is electrically charged. It can be provided to the automobile 9.

  As described above, by setting a plurality of charge levels according to usages and assigning the charging levels to the respective usages according to the state of charge of the secondary battery 30, the secondary battery 30 can be efficiently used. Can greatly enhance the usefulness.

  In the third embodiment described above, the charge amount of the secondary battery 30 is periodically checked. However, when the secondary vehicle 30 is requested from the electric vehicle 9 or the like, the charge amount is confirmed. Then, it may be configured to output the result of whether or not there is a secondary battery 30 that can be provided for replacement.

  In addition, this invention is not limited only to the structure of the above-mentioned embodiment, Many embodiments can be obtained.

The system block diagram of a secondary battery management system. The block diagram of a secondary battery management system. The flowchart which shows operation | movement of the control part of a secondary battery management system. The system block diagram of the secondary battery management system of 2nd Example. The block diagram of the secondary battery management system of 2nd Example. The flowchart which shows operation | movement of the control part of the secondary battery management system of 2nd Example. The flowchart which shows operation | movement of the control part of the secondary battery management system of 3rd Example. The graph which shows the charge characteristic of a secondary battery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Secondary battery management system 2 ... Commercial power supply 3 ... Power supply by photovoltaic power generation 8 ... Equipment load 9 ... Electric vehicle 24 ... Charge amount detection part 25 ... Control part 29 ... Connection terminal 30 ... Secondary battery

Claims (7)

A plurality of connection means for electrically connecting the secondary battery;
Power supply means for charging each secondary battery connected to the connection means;
Detecting means for detecting a charge amount of each secondary battery connected to the connecting means;
Information on the number of secured secondary batteries to be secured in a charged state or information related to the secured number is stored, the necessary secured number is obtained based on the information, and the obtained necessary secured number and each A secondary battery management system comprising: control means for determining whether or not the discharged secondary battery connected to the connection means needs to be charged based on a charge amount of the secondary battery. The reserved number is reserved for one of the preset uses of a facility application that supplies power to facility equipment through the connection means and an electric vehicle application that supplies power to an electric vehicle separated from the connection means. It consists of the number of charged secondary batteries
The control means determines whether or not a secondary battery necessary for the one application has been secured based on the necessary number of pieces to be secured and a charge amount of each secondary battery, and determines that the secondary battery has been secured. 2. The secondary battery management system according to claim 1, wherein the use of the remaining secondary battery is permitted for the other use. The determination as to whether or not the secondary battery necessary for the one application has been secured is a first determination,
The control means performs a second determination for determining whether or not the remaining secondary battery can be provided for the other application, and permits the use of the secondary battery determined to be provided for the other application. The secondary battery management system according to claim 2. In the first determination, the control means determines that the charge amount of one secondary battery is greater than or equal to the first individual charge amount, and in the second determination, the secondary battery 1 It shall be determined including that the amount of charge in one unit is greater than or equal to the second individual charge amount,
4. The secondary battery management system according to claim 3, wherein the first individual charge amount and the second individual charge amount are set to different charge amounts. The reserved number is composed of information on the number corresponding to each period,
5. The secondary according to claim 1, wherein the control unit obtains the necessary reserved number corresponding to a current time or a time when a time required for charging has elapsed from the present time. Battery management system. Electrically connecting the secondary battery to a plurality of connection means;
Charging each secondary battery connected to the connection means by power supply means,
Detecting the charge amount of each secondary battery connected to the connection means by the detection means;
The control means stores information on the number of secured secondary batteries to be secured in the charged state or information related to the secured number, obtains the necessary secured number based on the information, and obtains the necessary secured A secondary battery management method comprising: determining whether or not a discharged secondary battery connected to the connection means needs to be charged based on the number and the charge amount of each secondary battery. The reserved number is reserved for one of the preset uses of a facility application that supplies power to facility equipment through the connection means and an electric vehicle application that supplies power to an electric vehicle separated from the connection means. The number of charged secondary batteries
The control means determines whether or not a secondary battery necessary for the one application has been secured based on the required number of securement and the charge amount of each secondary battery, and determined that the securement has been secured. 7. The secondary battery management method according to claim 6, wherein the use of the remaining secondary battery is permitted for the other use.

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