JP2012065421A - Device, method, and program for charge control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge control device which proactively uses electric power of solar power generation to reduce the use of electric power of a commercial power supply and avoids the shortage of a charge amount even when the device is frequently moved.SOLUTION: A charge control device is a portable terminal device 100 which controls the charge to an accumulator 113. The charge control device includes: a solar cell 111 charging the accumulator 113; a position information obtaining unit 105 obtaining position information relating to a position of the portable terminal device 100; a memory 106 storing the obtained position information and charge amount information relating to a charge amount that the accumulator 113 is charged by the solar cell 111 in the position according to the position information; and a control unit 101 which estimates the charge amount by the solar cell 111 in a planned charge position based on the position information relating to a position corresponding to the planned charge position and the charge amount information obtained according to the position information from among the information stored in the memory 106.

Description

  The present invention relates to a charge control device, a charge control method, and a charge control program.

  In recent years, electric power generated by green energy that emits less greenhouse gases and harmful gases and has a low environmental impact has been actively used as a power source for home appliances, electronic devices, automobiles, and the like. Green energy refers to renewable energy such as wind, solar, biomass, and geothermal. Among power generation using green energy, solar power generation is becoming more familiar in recent years as it is spreading to households.

  It has been practiced to ensure the necessary power by combining the power obtained by such photovoltaic power generation and the power obtained by a conventional commercial power source. For example, a solar cell system that charges a storage battery that compensates for a shortage of power supply of a solar cell using the nighttime power of the day based on a weather forecast for the next day that is predicted on the day is known (see, for example, Patent Document 1). .

  In addition, weather information from the current location to the destination is received via the mobile phone, and the sunshine time from the current location to the destination is predicted based on the received weather information. Based on the sunshine time, the solar cell, the motor And a vehicle charge control device that determines the amount of charge to the battery by the engine, respectively (see, for example, Patent Document 2).

  Further, based on charging mode determination data such as date and time information, geographical position information, and weather information from the communication base station, any one of a plurality of types of charging means such as a solar cell, a fuel cell, and an AC power source is used. A portable electronic device that is connected to a secondary battery and starts charging is known (see, for example, Patent Document 3).

Japanese Patent No. 2612639 JP 2000-125407 A JP 2008-167562 A

  However, when the solar cell to be used is mounted on an easily portable electronic device such as a mobile phone, the electronic device may frequently move indoors and outdoors with the user. In this case, even if the amount of sunlight is predicted based on the weather forecast, etc., the electronic device is not always located in a place where the amount of sunlight according to the weather information can be obtained. There may be a shortage.

  The present invention has been made in view of the above circumstances, and even when the apparatus itself moves frequently while actively using the power generated by solar power generation to suppress the use of power from the commercial power source. An object of the present invention is to provide a charge control device, a charge control method, and a charge control program capable of avoiding a shortage of charge.

  The charge control device according to the first aspect of the present invention is a charge control device that controls charging of a secondary battery, and is a solar cell that charges the secondary battery, and a position related to the position of the charge control device. A position information acquisition unit that acquires information; position information acquired by the position information acquisition unit; and charge amount information related to a charge amount of the secondary battery charged by the solar cell at a position related to the position information; Among the information stored in the storage unit, the position information relating to a position corresponding to a planned charging position that is a position where the secondary battery is charged by the solar battery, and the position A charge amount prediction unit that predicts a charge amount by the solar cell at the planned charging position based on the charge amount information related to the information.

  Moreover, the charge control device according to the second aspect of the present invention is the charge control device according to claim 1, wherein the storage unit is configured by the solar cell at the position information and the position related to the position information. Charge time information related to a charge time when the secondary battery is charged and charge amount information related to a charge amount at the charge time at the position are stored, and the charge amount predicting unit is stored in the storage unit. Among the information, the position information related to the position corresponding to the planned charging position, and the charging time information related to the time corresponding to the scheduled charging time, which is the time when the secondary battery is charged by the solar battery, Based on the position information and the charge amount information related to the charge time information, a charge amount by the solar cell at the scheduled charge time at the planned charge position is predicted.

  Further, in the charge control device according to the third aspect of the present invention, the storage unit stores the charge time information separately for each group, and the charge amount prediction unit stores the charge time information in the charge time information of the same group. Statistical processing is performed on the charging amount, and the charging amount by the solar cell at the scheduled charging time at the planned charging position is predicted based on the result of the statistical processing.

  Further, in the charge control device according to the fourth aspect of the present invention, the storage unit is configured to provide a weather forecast when the secondary battery is charged by the solar battery at the position related to the position information and the position information. The correction coefficient determined based on the weather forecast information and the charge amount information related to the charge amount in the case of the weather forecast at the position are stored, and the charge amount prediction unit is stored in the storage unit Among the information, the position information related to the position corresponding to the planned charging position, the correction coefficient determined based on the weather forecast information related to the weather forecast when the secondary battery is charged by the solar battery, Based on the position information and the charge amount information related to the weather forecast information, the charge amount by the solar cell in the case of the weather forecast at the planned charge position is predicted.

  Moreover, the charge control apparatus which concerns on the 5th aspect of this invention WHEREIN: The said charge amount estimation part shows the charge amount in the position different from the position which concerns on the other position information memorize | stored by the said memory | storage part in the said different position. The amount of charge by the solar cell at the planned charging position is predicted as being smaller than the amount of charge related to the charge amount information related to the.

  Moreover, the charge control apparatus which concerns on the 6th aspect of this invention WHEREIN: The said charge amount estimation part charge in the position different from the position which concerns on other position information among the charge amount information memorize | stored by the said memory | storage part. The amount information is excluded, and the amount of charge by the solar cell at the planned charging position is predicted.

  Moreover, the charge control apparatus which concerns on the 7th aspect of this invention is equipped with the illumination intensity sensor which detects illumination intensity amount, The illumination intensity which concerns on the illumination intensity amount which the said memory | storage part detected by the illumination intensity sensor in the position which concerns on the said positional information Amount information is stored, the charge amount prediction unit, the information stored in the storage unit, the position information related to the position corresponding to the planned charging position, the illuminance amount information related to the position information, Based on the above, the amount of charge by the solar cell at the charging scheduled position is predicted.

  Moreover, the charge control apparatus which concerns on the 8th aspect of this invention is based on the full charge amount of the said storage battery, and the charge amount by the said solar cell estimated by the said charge amount estimation part by other than the said solar cell. A charging threshold value determining unit that determines a charging threshold value for controlling the charging amount is provided.

  Moreover, the charge control apparatus which concerns on the 9th aspect of this invention WHEREIN: The said charge threshold value determination part has memorize | stored the predetermined threshold value about the charge amount of the said storage battery, and the said charge amount estimation part estimates from the said full charge amount When the remaining amount obtained by subtracting the charged amount by the solar cell is less than a predetermined threshold, the charging threshold is determined as the predetermined threshold.

  Moreover, the charge control method according to the tenth aspect of the present invention includes a step of acquiring position information related to a position of a charge control device that controls charging of a secondary battery, the acquired position information, and the position Storing the charge amount information related to the charge amount that the secondary battery is charged by the solar battery included in the charge control device at a position related to the information, and among the stored information, the solar cell Charging by the solar cell at the planned charging position based on the position information related to the position corresponding to the planned charging position where the secondary battery is charged and the charge amount information related to the position information Predicting the quantity.

  The charge control program according to the eleventh aspect of the present invention includes a step of acquiring, in a computer, position information related to a position of a charge control device that controls charging of a secondary battery, and the acquired position information. Storing a charge amount information related to a charge amount that the secondary battery is charged by a solar battery included in the charge control device at a position related to the position information, and among the stored information, the sun Based on the position information related to the position corresponding to the planned charging position where the secondary battery is charged by the battery, and the charge amount information related to the position information, the sun at the planned charging position And a step of predicting a charge amount by a battery.

  According to the charge control device according to the first aspect of the present invention, by predicting how much the solar battery can be charged in an actual environment, it is possible to prevent the charge amount from being insufficient, Charging from a power source (such as an AC power source) can be suppressed. That is, it is possible to avoid a shortage of charge even when the apparatus itself moves frequently while actively using the power generated by solar power generation to suppress the use of power from the commercial power source.

  Moreover, according to the charging control device according to the second aspect of the present invention, when there is a lifestyle habit to go to the same place regularly, the charging is performed again in the past at the time corresponding to the time charged in the past. Expected to go out to the place. Therefore, by predicting how much the solar battery can be charged when there is such a lifestyle, charging from a power source (such as an AC power source) other than the solar battery is prevented while preventing a shortage of charge. Can be suppressed.

  Moreover, according to the charging control device according to the third aspect of the present invention, for example, when there is a lifestyle habit of going to the same place every day of the week, charging such as the past charging place and the amount of charge on the day of the week when charging is performed. Information about the day of the week can be collected, an average value or an intermediate value of the charge amount can be obtained by statistical processing for the day of the week, and the charge amount of the day of the week can be predicted with high accuracy.

  Moreover, according to the charge control apparatus which concerns on the 4th aspect of this invention, a charge amount can be estimated more accurately by weighting with respect to the past charge amount according to a weather forecast. Thereby, even if it is the same place, although the charge amount by a solar cell differs, for example on a cloudy day and a clear day, according to a weather forecast, a charge amount can be estimated more accurately.

  Moreover, according to the charging control apparatus which concerns on the 5th aspect of this invention, since there exists a possibility that the charge amount as expected may not be obtained by the charge by a solar cell in the environment outside daily life, the charge by a solar cell By predicting a small amount, it is possible to prevent a shortage in the amount of charge caused by estimating a large amount of charge.

  Moreover, according to the charging control apparatus which concerns on the 6th aspect of this invention, the precision of prediction of charge amount improves, without reflecting exceptional cases, such as a trip, in prediction of charge amount.

  Moreover, according to the charging control apparatus which concerns on the 7th aspect of this invention, the future charge amount in the position charged in the past can be estimated by deriving the past charge amount from the past illuminance amount. it can.

  Moreover, according to the charge control apparatus which concerns on the 8th aspect of this invention, the charge amount other than a solar cell can be adjusted based on the estimated charge amount by a solar cell, and a secondary battery becomes insufficient in charge amount. It is possible to efficiently suppress charging from a power source (such as an AC power source) other than the solar battery.

  Moreover, according to the charge control apparatus which concerns on the 9th aspect of this invention, even if it is a case where it is unpredictable and the charge by a solar cell fails, the charge amount which a predetermined threshold value shows can be ensured.

  According to the charging control method according to the tenth aspect of the present invention, by predicting how much the solar cell can be charged in an actual environment, while preventing the amount of charge from being insufficient, Charging from a power source (such as an AC power source) can be suppressed. That is, it is possible to avoid a shortage of charge even when the apparatus itself moves frequently while actively using the power generated by solar power generation to suppress the use of power from the commercial power source.

  According to the charge control program according to the eleventh aspect of the present invention, by predicting how much the solar battery can be charged in an actual environment, it is possible to prevent other than the solar battery while preventing the charge amount from being insufficient. Charging from a power source (such as an AC power source) can be suppressed. That is, it is possible to avoid a shortage of charge even when the apparatus itself moves frequently while actively using the power generated by solar power generation to suppress the use of power from the commercial power source.

The block diagram which shows the structural example of the portable terminal device in the 1st Embodiment of this invention. The flowchart which shows the operation example regarding charge of the portable terminal device in the 1st Embodiment of this invention. The flowchart which shows the operation example for the portable terminal device in the 1st Embodiment of this invention to determine the charge threshold value in a power saving charge mode. The figure which shows an example of the charge amount of the day when the storage battery was charged with the solar cell in the 1st Embodiment of this invention. The table which shows an example of the relationship between the weather forecast information and the correction coefficient in the first embodiment of the present invention The figure which shows an example of the time transition of the correction coefficient at the time of using the weather forecast information in the 1st Embodiment of this invention. The flowchart which shows the 1st operation example for the portable terminal device in the 1st Embodiment of this invention to charge a storage battery by AC charger. The flowchart which shows the 2nd operation example for the portable terminal device in the 1st Embodiment of this invention to charge a storage battery with an AC charger. The flowchart which shows the 2nd operation example for the portable terminal device in the 1st Embodiment of this invention to charge a storage battery with an AC charger. The block diagram which shows the structural example of the portable terminal device in the 2nd Embodiment of this invention. The flowchart which shows the operation example for the portable terminal device in the 2nd Embodiment of this invention to determine the charge threshold value in a power saving charge mode.

  Embodiments of the present invention will be described below with reference to the drawings.

  The charging control device according to the embodiment of the present invention includes a mobile terminal device such as a mobile phone and a personal digital assistant (PDA), a portable game machine, a portable music player, a portable television receiver, a portable radio receiver, and a personal computer. Widely includes devices that can be carried by users, such as electronic devices such as home appliances, solar cars, solar bikes, and solar bicycles. In the following embodiments, a mobile terminal device will be described as an example.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration example of a mobile terminal device according to the first embodiment of the present invention. 1 includes a control unit 101, an antenna unit 102, a radio unit 103, a display unit 104, a position information detection unit 105, a memory 106, an operation unit 107, a speaker 108, a microphone 109, a receiver 110, and a solar cell. 111, a charge control unit 112, a storage battery (secondary battery) 113, and an adapter connection unit 114. The control unit 101 includes a CPU (microcomputer) 121, a program storage unit 122, and a power supply control unit 123.

  The control unit 101 controls the overall operation of the mobile terminal device 100. The wireless unit 103 forms a wireless communication line with a wireless base station of a mobile phone via the antenna unit 102, and communicates with an external communication device. The display unit 104 is configured by a liquid crystal display or the like, and displays various information such as character strings and images on the screen as visible information.

  The position information acquisition unit 105 acquires position information related to the position of the mobile terminal device 100. For example, information on the latitude, longitude, and altitude where the mobile terminal device 100 is located is acquired by a GPS (Global Positioning System) function. In addition, for example, information on the ID of the base station with which the mobile terminal device 100 communicates is acquired. Further, for example, information on a wireless LAN access point to which the mobile terminal device 100 is connected is acquired.

  The memory 106 includes a read-only memory (ROM), a readable / writable memory (RAM), a nonvolatile memory, and the like. On the memory 106, data of various programs necessary for the operation of the CPU 121 and the like and information necessary for realizing various functions are held.

  Further, the memory 106 includes various kinds of information such as position information related to the position of the mobile terminal device 100 acquired by the position information acquisition unit 105, charge amount information related to a charge amount of the storage battery 113 charged by the solar battery 111 at the position. Store information. Moreover, the charging date information regarding the charging date when the storage battery 113 was charged by the solar battery 111 may be stored. The charging date / time may be, for example, information identifying only the day of the week or information identifying up to hour and minute, and widely includes information on time and time. Further, weather forecast information related to a weather forecast when the storage battery 113 is charged by the solar battery 111 may be stored. The memory 106 can store these pieces of information in association with each other.

  The operation unit 107 includes keys such as a numeric keypad and direction keys, a touch pad, a touch panel, and the like. Various information can be input by operating the operation unit 107. The speaker 108 converts the received electrical signal such as the voice of the other party into sound vibration and outputs it, and is used, for example, when the hands-free function is applied. It is assumed that the sound output from the speaker 108 is heard from a distance. The microphone 109 converts sound such as voice uttered by a user who uses the mobile terminal device 100 into an electrical signal. The receiver 110 converts an electrical signal such as the voice of the other party to be received into an acoustic vibration and outputs it. For example, the receiver 110 is used during a normal call. The sound output by the receiver 110 is assumed to be heard nearby.

  The solar cell 111 is a power device that directly converts light energy, such as sunlight, into electric power using the photovoltaic effect. The adapter connection unit 114 is a connection terminal to which an AC charger, a USB charging cable, a DC charger, or the like is connected, and is supplied with power from an external power supply outside the mobile terminal device 100. In the following description, an example in which an AC charger is used as an external power source will be mainly described.

  The charging control unit 112 controls charging of the rechargeable storage battery 113 and controls the storage battery 113 to supply power from the solar battery 111 or power from an external power source connected to the adapter connection unit 114. Or control to stop the supply of power.

  The CPU 121 reads out and executes the program stored in the program storage unit 122 and the data of the program held in advance on the memory 106 and controls each unit in the control unit 101 to realize a required function. For example, operations and processes of the mobile terminal device 100 described later are also realized by the CPU 121 executing a predetermined program. This program may include the charge control program of this embodiment.

  The program storage unit 122 stores a program executed by the control unit 101. This program includes, for example, the charge control program of the present embodiment. The power supply control unit 123 monitors the status of the solar battery 111 and the storage battery 113 and gives necessary instructions to the charge control unit 112.

  Moreover, the control part 101 is the information stored in the memory 106, the positional information which shows the same position as the scheduled charging position which is the position where the storage battery 113 is charged by the solar battery 111, and the charge amount information related to this positional information (That is, the charge amount information relating to the charge amount at the same position as the planned charge position) and the charge amount by the solar cell 111 at the planned charge position are predicted. Here, the same position is not limited to a case where GPS information such as latitude, longitude, altitude acquired by GPS, base station ID, and access point information completely match. For example, depending on the accuracy of the positioning system to be used, if it is within a certain range, it is regarded as the same position, and even if the accuracy is taken into account, if the position is clearly different, it is not considered as the same position. Also good. Here are some examples.

  For example, an A-GPS system using both GPS and base station information has an accuracy of several meters to 20 meters even indoors. For this reason, the positioning result may be shifted by about 20 m even at exactly the same position. Therefore, since the measurement accuracy changes depending on the environment, it is desirable to consider this deviation and consider a range having a certain width as the same position. For example, in an example in which the worst accuracy of measurement is determined to be 20 m, a position that is more than 20 m away from the measurement is not regarded as the same position, and if it is less than 20 m, it can be considered as the same position. Note that there are cases where only GPS satellites can be used when the mobile phone is in an out-of-service area.

  In addition, there are cases where it is more effective to use base station information in an area where GPS satellite reception such as indoors cannot be used well. Positioning using base station information depends greatly on the cell radius of the base station. The accuracy in this case is generally 200 to 500 m in urban areas and 2 to 3 km in suburbs. Therefore, in this case, if the position shift is in the range of about several kilometers, it can be considered that the position is the same.

  A case where positioning using a wireless LAN access point is used is also conceivable. In this case, the accuracy is generally about 100 m or less. In this case, for example, it is conceivable that a position deviated by 100 m or more is not regarded as the same position, and is regarded as the same position if it is less than 100 m. Note that positioning using a wireless LAN access point is limited to an area where the access point exists.

  In reality, since it is unlikely that the user always places the mobile terminal device 100 at the exact same position, even if the positioning system is very accurate and the position can be detected accurately, It is desirable to give a range to the judgment range.

  Further, the control unit 101 sets the charging mode. The charging mode includes a power saving charging mode and a normal charging mode. Moreover, the control part 101 determines the charge threshold value for controlling the charge amount to the storage battery 113 by an AC charger. Note that the charging threshold may be determined for each charging mode. In this case, in the power saving charging mode, the charging threshold is determined in consideration of the amount of charge to the storage battery 113 by the solar battery 111. In the normal charging mode, the charging threshold is determined without considering the amount of charge to the storage battery 113 by the solar battery 111. Therefore, the power saving charging mode can perform charging more efficiently than the normal charging mode.

Next, the operation of the mobile terminal device 100 shown in FIG. 1 will be described.
FIG. 2 is a flowchart illustrating an operation example related to charging of the mobile terminal device 100.

  The charging control unit 112 executes a charging threshold value determining process in the power saving charging mode for determining a charging threshold value in the power saving charging mode (step S11). Details of the charging threshold value determination process in the power saving charging mode will be described later. Subsequently, the charging control unit 112 executes a charging process for charging the battery 113 by the AC charger using the charging threshold value in the power saving charging mode or the charging threshold value in the normal charging mode (step S12). Details of the charging process by the AC charger will be described later.

  Note that the charging threshold value determination process in the power saving charging mode may be performed only when the power saving charging mode is set to the charging mode. Further, only when the AC charger is connected to the adapter connection unit 114, the charging threshold value determination process in the power saving charging mode may be performed.

  In FIG. 2, the charging threshold value determining process in the power saving charging mode and the charging process by the AC charger are continuously performed. However, the present invention is not limited to this, and the charging threshold value in the power saving charging mode is determined in advance. Alternatively, the charging process by the AC charger may be performed at an arbitrary timing.

  In addition, an area where the power saving charging mode can be performed is limited, and if the position of the mobile terminal device 100 acquired by the position information acquisition unit 105 is outside the area where the power saving charging mode can be performed, the area can be saved. Even if the power charging mode is set to the charging mode, the charging process by the AC charger may be performed on the assumption that the normal charging mode is set.

Next, details of the charging threshold value determination process in the power saving charging mode will be described.
FIG. 3 is a flowchart illustrating an operation example for the mobile terminal device 100 to determine a charging threshold value in the power saving charging mode.

  First, the wireless unit 103 receives weather forecast information (information such as clear / sunny / cloudy / rainy) related to the weather forecast from an external server (not shown), and the control unit 101 uses the weather forecast information as a sample in the memory 106. Store (step S101). Subsequently, the position information acquisition unit 105 acquires the position information of the mobile terminal device 100 via the wireless unit 103, and the control unit 101 stores the position information in the memory 106 as a sample (step S102). Subsequently, the charge control unit 112 monitors the amount of charge that the storage battery 113 has been charged by the solar battery 111, and stores the amount of charge information related to the amount of charge in the memory 106 as a sample (step S103).

  Note that in steps S101 to S103, the timing of acquiring each sample of weather forecast information, position information, and charge amount information and storing it in the memory 106 is arbitrary, but is performed at the same timing, for example, at intervals of 30 minutes. Moreover, although the period (sample period) which acquires said sample etc. is also arbitrary, it is 4 weeks, for example.

  Further, it is not necessary to acquire all of the weather forecast information, position information, and charge amount information, and at least position information and charge amount information may be acquired. Further, the control unit 101 may acquire the charging date / time information related to the charging date / time, for example, and store it in the memory 106.

  Subsequently, in steps S101 to S103, the control unit 101 determines whether or not a predetermined sample period (for example, 4 weeks) has elapsed since the start of acquisition of each sample or the like (step S104). If the predetermined sample period has not elapsed, the process returns to step S101.

  When a predetermined sample period has elapsed from the start of acquisition of each sample or the like, the control unit 101 predicts a charge amount when the storage battery 113 is charged by the solar cell 111 based on each sample (step S105). . For example, by acquiring the position information acquired by GPS or the like and the charge amount information related to the charge amount of the storage battery 113 charged by the solar battery 111 at the position related to this position information, the acquisition at that position The amount of charge at the timing can be known. Further, by accumulating the amount of charge acquired periodically, for example, the amount of charge per day can be known. By accumulating information on the amount of charge as past information, it is possible to predict that the amount of charge will be the same when performing the same action as that day, that is, when going to the same place. it can.

  Subsequently, the control unit 101 determines a charging threshold value in the power saving charging mode based on the predicted charging amount (predicted charging amount) (step S106). The charging threshold is determined based on the full charge amount of the storage battery 113 and the predicted charge amount by the solar cell 111, and is, for example, an amount obtained by subtracting the predicted charge amount by the solar cell 111 in a specific period from the full charge amount of the storage battery 113. . The charging threshold may be determined every day of the week, every hour, or every other specific period (weekdays, weekends, etc.).

  Next, a first specific example of the charging threshold in the power saving charging mode will be described.

  FIG. 4 is an example of the daily charge amount when the storage battery 113 is charged by the solar battery 111, and shows the transition of the daily charge amount.

<Step A>
Charge amount W of the battery 113 by the solar cell 111 of the day, the charging of the charge amount from the time t0 to time t1 W1, the charge amount from the time t1 to the time t2 W2, from time _{t a} to time _{t a + 1} When the amount is W _{a + 1} , it can be expressed by the following (formula 1).
W = W1 + W2 +... + W _a + W _{a + 1} (Formula 1)
The control unit 101 integrates the amount of charge in each period shown in FIG. This integrated value is the amount of charge per day.

  Here, the time interval of the charge amount measurement stored in the memory 106 may be arbitrary. However, if the interval is 30 minutes, for example, 48 steps from time t1 to t48 are obtained, and 48 charge amount samples are obtained. In addition, the number of position information samples acquired by the position information acquisition unit 105 at this time is 48, and each indicates a charging place corresponding to each charge amount. Instead of acquiring the daily charge amount as a sample, the sunrise time and the sunset time may be acquired, and the charge amount sample may be obtained only during the period from the sunrise time to the sunset time. This is because the solar battery 111 cannot be expected to charge after sunset.

<Step B>
The control unit 101 classifies the daily charge amount obtained in Step A into each day of the week and stores it in the memory 106. At this time, the charge amount on Monday is W (Monday), the charge amount on Tuesday is W (Tue), the charge amount on Wednesday is W (Wed), and the charge amount on Thursday is W (Thursday), Friday's charge amount on Friday is W (Friday), Saturday's charge amount on Saturday is W (Saturday), and Sunday's charge amount on Sunday is W (Sunday).

<Step C>
The control unit 101 calculates the average charge amount for each day of the week as the predicted charge amount according to the sample period. The sample period is arbitrary, but a longer period is desirable. For example, if the sample period is 4 weeks, the charge amount on the first Monday is W (month 1), the charge amount on the second Monday is W (month 2), 3 The charge amount on the Monday of the week is W (month 3), and the charge amount on the Monday of the fourth week is W (month 4). At this time, the average charge amount Wave (Month) on Monday can be expressed by the following (Formula 2).
Wave (month) = W (month 1) + W (month 2) + W (month 3) + W (month 4) / 4 (Formula 2)
Here, an example is shown in which the average charge amount is calculated for each day of the week. However, the present invention is not limited to this, and a shorter period such as an average charge amount for every hour or an average charge amount for every six hours may be set. .

  As described above, the control unit 101 uses the same group (same day, same time zone, etc.) among the charging date and time information stored in the memory 106 divided into groups (every day of the week, every specific time zone, etc.). A statistical process such as an averaging process is performed on the charge amount related to the charge date and time information belonging to, and based on the result, the scheduled charge date and time that is the date and time when the storage battery 113 is charged by the solar cell 111 at the planned charge position You may estimate the charge amount by the solar cell 111 (for example, the following Monday).

  Further, the control unit 101 uses the position information related to the position corresponding to the scheduled charging position and the date and time before the scheduled charging date and time (for example, one week) out of the information stored in the memory 106 without using the average value. Based on the charging date and time information relating to the previous Monday) and the amount of charge associated with the position information and the charging date and time information, by the solar cell 111 at the scheduled charging date and time (for example, next Monday) The amount of charge may be predicted.

<Step D>
When the charging place in a specific period of the sample period is different from the charging place in other periods, the control unit 101 may prohibit use as a sample for calculating the predicted charge amount. This is because when the battery is in a place that is significantly different from the normal living environment, the charged amount of the solar cell may be greatly deviated from the charged amount in normal times. The charging place different from the charging place in other periods corresponds to, for example, position information that is equal to or more than a predetermined distance from the average position of the position related to the position information stored in the memory 106 among the position information stored in the memory 106. It is a charging place. In addition, for example, position information related to a charging place where use as a sample is prohibited may be registered in advance.

Here, it is assumed that the sample period is 4 weeks as in Step C, and the number of samples per day is 48 as in Step A. In addition, the case where the control unit 101 determines that the two samples in the period from the time t1 to t2 in the first week and the period from the time t2 to t3 are different from the other weeks (from the second week to the fourth week). Suppose. When the charge amount in the period from the time t1 to t2 in the first week is W (month 1) t2, and the charge amount in the period from the time t2 to t3 in the first week is W (month 1) t3, the average value is used. In this case, the predicted charge amount can be expressed by the following (Equation 3).
W (Month) = [{(W (Month 1) -W (Month 1) t2-W (Month 1) t3 + W (Month 2) + W (Month 3) + W (Month 4)) / (46 + 48 + 48 + 48)} × 192] / 4 (Formula 3)

  As described above, the control unit 101 determines the amount of charge charged at a position different from the position related to the other position information stored in the memory 106 (for example, the amount of charge during the period from time t1 to t3 in the first week). Assuming that the charge amount is 0, the charge amount by the solar cell 111 at the planned charge position may be predicted by excluding the charge amount from the target for prediction.

  Further, the control unit 101 actually stores the charge amount stored in the memory 106 and charged at a position different from the position related to the other position information (for example, the charge amount during the period from time t1 to t3 in the first week). Alternatively, it may be handled as a charge amount smaller than the charge amount stored in the memory 106 and used for prediction of the charge amount.

<Step E>
The charging control unit 112 calculates a charging threshold value in the power saving charging mode based on the predicted charging amount. The charging threshold value in the power saving mode may be set for each specific period. For example, it is assumed that charging by the solar cell 111 is performed for three days on Tuesday, Wednesday, and Thursday. Assuming that the estimated charge amount for the above three days is B, the charge threshold Cth in the power saving charge mode can be expressed by the following (Equation 4) using the full charge amount Cmax of the storage battery 113.
Cth = Cmax−B (Formula 4)

  By predicting the amount of charge by the solar cell 111 according to the first specific example as described above, it is possible to use as much as possible the charge by the solar cell 111 with a small environmental load while preventing the storage battery 113 from being insufficiently charged. . For example, if you repeat the same lifestyle every week (such as going to work on a weekday), you can predict where the user will be in the same time zone on the same day of the week. Based on the amount of charge at the position, the future charge date and time and the amount of charge at the charge position can be predicted. By predicting the amount of charge by the solar battery 111, it is possible to determine at least how much charging (for example, by an AC charger) by a device other than the solar battery 111 should be performed, so that a shortage of charge can be prevented.

Next, a second specific example of the charging threshold in the power saving charging mode will be described.
Here, the difference from the first specific example of the charging threshold in the power saving charging mode described above will be mainly described.

<Step A '>
The amount of charge W to the storage battery 113 by the solar cell 111 on the day can be expressed by (Equation 2) as in Step A. Here, the control unit 101 acquires a sample of weather forecast information as well as a sample of charge amount and a sample of position information, and stores them in the memory 106.

  Then, the control unit 101 calculates a correction coefficient based on the weather forecast information. This correction coefficient is used for weighting the amount of charge in a unit period. FIG. 5 is a table showing an example of the relationship between weather forecast information and correction coefficients. When this table is used, as shown in FIG. 6, when the weather forecast information from 0 o'clock to 7 o'clock and from 15 o'clock to 17 o'clock is clear, the correction coefficient α during this period is 0.6. When the weather forecast information from 7:00 to 15:00 shows clear weather, the correction coefficient α during this period is 1.0. When the weather forecast information from 17:00 to 23:00 is cloudy, the correction coefficient α during this period is 0.2. When the weather forecast information from 23:00 to 24:00 indicates rain, the correction coefficient α during this period is zero.

  In the example shown in FIG. 5, the weather forecast information has four patterns. However, if the weather forecast information can be acquired in more detail, the correction coefficient may be set more finely. In the example shown in FIG. 6, the weather forecast information is acquired at one-hour intervals, so there are 24 samples. However, the number of samples is arbitrary.

The daily charge amount reflecting the correction coefficient obtained based on the weather forecast information is defined as W ′. W ′ is calculated as the correction coefficient 1 in all unit times. The correction factor from time t0 to time t1 [alpha] 1, the correction factor from the time t1 to the time t2 [alpha] 2, when the correction factor from time _{t a} to time _{t a + 1} and alpha _{a + 1,} the charge amount W of day 'is less (Equation 5).
W ′ = W1 / α1 + W2 / α2 +... + W _a / α _a + W _{a + 1} / α _{a + 1} (Expression 5)
In addition, you may consider the sunrise time and the sunset time similarly to StepA.

<Step B '>
The control unit 101 causes the memory 106 to store the daily charge amount, which is obtained at Step A ′ and reflects the correction coefficient based on the weather forecast information, for each day of the week. At this time, the charge amount on Monday is W ′ (Monday), the charge amount on Tuesday is W ′ (Tue), the charge amount on Wednesday is W ′ (Wed), and the charge is on Thursday. Charge amount W '(Thursday), Friday daily charge amount W' (Friday), Saturday daily charge amount W '(Saturday), Sunday daily charge amount W' (Sunday) , And.

<Step C '>
The control unit 101 calculates the average charge amount for each day of the week as the predicted charge amount according to the sample period. The sample period is arbitrary, but a longer period is desirable. For example, when the sample period is 4 weeks, the charge amount on the first Monday is W ′ (month 1), and the charge amount on the second Monday is W ′ (month 2). The charge amount on the first Monday of the third week is W ′ (month 3), and the charge amount on the first Monday of the fourth week is W ′ (month 4). At this time, the average charge amount W′ave (month) on Monday can be expressed by the following (formula 6).
W′ave (month) = W ′ (month 1) + W ′ (month 2) + W ′ (month 3) + W ′ (month 4) / 4 (formula 6)
Note that the time unit for calculating the average charge amount is arbitrary as in Step C.
Further, similarly to Step C, the predicted charge amount may be obtained without using the average value.

<Step D '>
When the charging place in the specific period of the sample period is different from the charging place in other periods, the control unit 101 may prohibit use as a sample for calculating the predicted charge amount. Here, it is assumed that the sample period is 4 weeks and the number of samples per day is 48. In addition, the control unit 101 determines that two samples in the period from the time t1 to t2 in the first week and the period from the time t2 to t3 are different from the same time period in other weeks (from the second week to the fourth week). Assume that Judged. Assuming that the charge amount during the period from time t1 to t2 of the first week is W ′ (month 1) t2, and the charge amount during the period from time t2 to t3 of the first week is W ′ (month 1) t3, the average value is When used, the predicted charge amount can be expressed by the following (formula 7).
W ′ (month) = [{(W ′ (month 1) −W ′ (month 1) t2−W ′ (month 1) t3 + W ′ (month 2) + W ′ (month 3) + W ′ (month 4)) / (46 + 48 + 48 + 48)} × 192] / 4 (Formula 7)

<Step E '>
The control unit 101 acquires weather forecast information at the scheduled charging date and time, and determines a correction coefficient. For example, it is assumed that charging by the solar cell 111 is performed for three days on Tuesday, Wednesday, and Thursday. The correction coefficient for Tuesday time t0 to t1 is α (Tue) t1, the correction coefficient for Tuesday time t1 to t2 is α (Tue) t2, and the correction coefficient for Tuesday time t _{a to} t2 _{a + 1} is α (Tue) t _{a + 1} , The charging amount at time t0 to t1 on Tuesday is W ′ (Tue) t1, the charging amount at time t1 to t2 on Tuesday is W ′ (Tue) t2, and the charging amount at time t _{a to} t _{a + 1 on} Tuesday is W ′ ( Assuming that (Tue) t _{a + 1} , the estimated charge amount Wα (Tue) on Tuesday is expressed by the following (Equation 8).
Wα (Tue) = α (Tue) t1 × W ′ (Tue) t1 + α (Tue) t2 × W ′ (Tue) t2 +... Α (Tue) t _a × W ′ (Tue) t _a + α (Tue) t _{a + 1} × W ′ (Tue) t _{a + 1} (Equation 8)
As described above, when the actual predicted charge amount is obtained, the past charge amount stored with the correction coefficient as 1 is weighted with the correction coefficient.

Then, the control unit 101 calculates a predicted charge amount B ′ for three days on Tuesday, Wednesday, and Thursday reflecting the correction coefficient. The predicted charge amount B ′ can be expressed by the following (formula 9).
B ′ = Wα (Tue) + Wα (Wed) + Wα (Thu) (Formula 9)

Then, the control unit 101 calculates a charging threshold value in the power saving charging mode based on the predicted charging amount. The charging threshold value in the power saving mode may be set for each specific period. Here, the control unit 101 calculates a charging threshold value in the power saving charging mode on the previous Tuesday, Wednesday, and Thursday based on the predicted charging amount B ′. The charging threshold C′th in the power saving charging mode can be expressed by the following (Equation 10) using the full charge amount Cmax of the storage battery 113.
Cth = Cmax−B ′ (Formula 10)
In addition, although the charging threshold value for the above three days is shown as an example here, the charging timing of the solar cell 111 is arbitrary.

  As described above, the control unit 101 includes, among the information stored in the memory 106, position information related to the position corresponding to the scheduled charging position, a correction coefficient determined based on the weather forecast of the scheduled charging date and time, and the position information. And the charge amount information related to the correction coefficient, the charge amount in the case of the weather forecast at the scheduled charging date and time at the charging scheduled position may be predicted.

  By predicting the amount of charge by the solar cell 111 according to the second specific example, the correction coefficient corresponding to the weather forecast at the charging date and time when the sample is acquired and the correction coefficient corresponding to the weather forecast at the scheduled charging date and time are obtained. Since it is used, the charge amount can be predicted more accurately. For example, even when the user is charged at the same place, such as when the user is located near a window on a daily basis, the amount of charge may vary greatly depending on the weather. Therefore, in the second specific example, the charge amount is used for prediction after the fluctuation of the charge amount due to the weather is leveled by using the correction coefficient, so that the charge amount can be predicted more accurately.

Next, details of the charging process by the AC charger of the mobile terminal device 100 will be described.
FIG. 7 is a flowchart illustrating a first operation example for the mobile terminal device 100 to charge the storage battery 113 with an AC charger.

  First, the control unit 101 determines whether or not an AC charger is connected to the adapter connection unit 114 (step S201). Subsequently, the control unit 101 determines whether or not the charging mode is set to the power saving charging mode (step S202). When the charging mode is set to the power saving charging mode, the control unit 101 sets the charging threshold in the power saving charging mode as the charging threshold to be used (step S203). The charging threshold value here may be either a charging threshold value when the correction coefficient is considered or a charging threshold value when the correction coefficient is not considered. On the other hand, when the charging mode is not set to the power saving charging mode, the control unit 101 sets the charging threshold in the normal charging mode as a charging threshold to be used (step S204).

  After the charge threshold value to be used is set, the control unit 101 determines whether or not the remaining capacity of the storage battery 113 is less than the set charge threshold value (step S205). If it is less than the charging threshold, the charging control unit 112 controls the storage battery 113 to be charged by the AC charger (step S206). After starting charging the storage battery 113, the control unit 101 determines whether or not the remaining capacity of the storage battery 113 is less than the set charging threshold (step S207). When it is less than the charging threshold value, the process returns to step S206 in order to control to continuously charge the storage battery 113 by the AC charger.

  On the other hand, in step S205 or S207, when the remaining capacity of the storage battery 113 is equal to or greater than the set charging threshold, the charging control unit 112 controls to stop charging the storage battery 113 by the AC charger (step S208).

  According to such a charging process by the AC charger, the charging amount of the storage battery 113 is insufficient by charging by the AC charger using the charging threshold in the power saving charging mode or the charging threshold in the normal charging mode. Therefore, the solar battery 111 can be charged with as little environmental load as possible.

  Next, FIG. 8 to FIG. 9 are flowcharts showing a second operation example for the mobile terminal device 100 to charge the storage battery 113 with an AC charger. In the second operation example, it is ensured that the remaining capacity of the storage battery 113 is 10% or more after AC charging. In this example, even if it is predicted that the solar battery 111 can be charged almost 100%, the solar battery 111 is not fully charged due to changes in lifestyle, etc. This is an example in which the charged amount (10% in this example) is secured. That is, a predetermined threshold (for example, 10%) is stored for the amount of charge of the storage battery 113, and the remaining amount obtained by subtracting the amount of charge by the solar battery 111 predicted by the control unit 101 from the full charge amount of the storage battery 113 is a predetermined amount. If it is less than the threshold, the charging threshold is determined to be the predetermined threshold. The numerical value of 10% is an example, and other numerical values may be used.

  In the examples illustrated in FIGS. 8 to 9, it is assumed that the power saving charging mode is set as the charging mode. Further, it is assumed that charging is performed by an AC charger when it is necessary only once every four days. That is, if necessary after using the mobile terminal device 100 for 3 days, it is charged by the AC charger. For example, when charging with an AC charger on Monday, it is Friday that the AC charger is charged next, and charging is not performed by the AC charger on Tuesday, Wednesday, and Thursday, and only charging by the solar cell 111 is performed. Is done.

  Here, the full charge amount of the storage battery 113 is A (full). Also, let B be the estimated charge amount based on the charge amount by the solar cell 111 for three days stored on the memory 106 on Tuesday, Wednesday, and Thursday. The predicted charge amount may be either the predicted charge amount when the correction coefficient is considered or the predicted charge amount when the correction coefficient is not considered. The remaining capacity of the storage battery 113 is C. The remaining capacity of the storage battery 113 is less than or equal to the full charge amount of the storage battery 113 and is 0 or more. That is, 0 ≦ C ≦ A (full) is satisfied. Here, the maximum charge amount of the storage battery 113 by the solar battery 111 is 90%.

  First, the control unit 101 determines whether or not the amount obtained by subtracting the remaining capacity of the storage battery 113 from the full charge amount of the storage battery 113 is greater than the predicted charge amount by the solar battery 111. That is, it is determined whether or not the condition of A (full) −C <B is satisfied (step S301). When this condition is satisfied, that is, when the amount of charge by the solar cell 111 is large and reaches the full charge amount only by charging by the solar cell 111, the control unit 101 considers the maximum charge amount by 90% by the solar cell 111. Then, it is determined whether or not the remaining capacity of the storage battery 113 is greater than 10% of the full charge amount. That is, it is determined whether or not the condition of C> (1-0.9) × A (full) is satisfied (step S302). When this condition is satisfied, the control unit 101 determines that the amount of charge by the AC charger is zero (step S303). In other words, since only charging by the solar battery 111 is sufficient, it is possible to perform charging in consideration of the environment without falling short of the charge amount even when only charging by the solar battery 111 is performed. Further, since the remaining capacity of the storage battery 113 has already exceeded 10%, even if charging with the solar battery 111 fails, the minimum charge amount can be guaranteed.

  On the other hand, when the condition of step S302 is not satisfied, the control unit 101 determines the amount of charge by the AC charger as an amount obtained by subtracting the remaining capacity from 10% of the full charge of the storage battery 113. That is, it is determined to be 0.1 × A (full) −C (step S304). Subsequently, the charging control unit 112 controls to perform charging by the AC charger (step S305). After the start of charging by the AC charger, the control unit 101 determines whether or not the remaining capacity of the storage battery 113 has reached 10% of the full charge amount of the storage battery 113. That is, it is determined whether or not the condition of C = 0.1 × A (full) is satisfied (step S306). When this condition is satisfied, the charging control unit 112 controls to stop charging by the AC charger (step S307). On the other hand, when this condition is not satisfied, the process returns to step S305 to continue charging by the AC charger.

  When the condition of step S301 is not satisfied, that is, when the charge amount by the solar cell 111 is small and the full charge amount is not reached only by the charge by the solar cell 111, the control unit 101 sets the maximum charge amount by 90% by the solar cell 111 In consideration, it is determined whether or not the remaining capacity of the storage battery 113 is larger than 10% of the full charge amount. That is, it is determined whether or not the condition of C> (1-0.9) × A (full) is satisfied (step S308). When this condition is not satisfied, the control unit 101 determines whether the amount obtained by subtracting the predicted charge amount of the solar battery 111 from the full charge amount of the storage battery 113 is greater than 10% of the full charge amount of the storage battery 113. That is, it is determined whether or not the condition of A (full) −B> (1-0.9) × A (full) is satisfied (step S309).

  When satisfying the condition of step S308 or satisfying the condition of step S309, the control unit 101 calculates the charge amount by the AC charger from the full charge amount of the storage battery 113, the predicted charge amount by the solar battery 111, and the remaining capacity of the storage battery 111. Decide on the subtracted amount. That is, A (full) -B-C is determined (step S310). This means that an amount insufficient for charging by the solar cell 111 is supplemented by AC charging. Subsequently, the charging control unit 112 performs control so as to perform charging by the AC charger (step S311). After the start of charging by the AC charger, the control unit 101 determines whether or not the remaining capacity of the storage battery 113 has reached an amount obtained by subtracting the estimated charge amount by the solar battery 111 from the full charge amount of the storage battery 113. That is, it is determined whether or not the condition of C = A (full) −B is satisfied (step S312). When this condition is satisfied, the charging control unit 112 controls to stop charging by the AC charger (step S307). On the other hand, if this condition is not satisfied, the process returns to step S311 to continue charging by the AC charger.

  On the other hand, when the condition of step S309 is not satisfied, the control unit 101 determines the amount of charge by the AC charger to be an amount obtained by subtracting the remaining capacity of the storage battery 113 from 10% of the full charge amount of the storage battery 113. That is, it is determined to be 0.1 × A (full) −C (step S313). This means that at least 10% or more of the full charge amount of the storage battery 113 is charged by AC charging. Subsequently, the charging control unit 112 controls to perform charging by the AC charger (step S314). After the start of charging by the AC charger, the control unit 101 determines whether or not the remaining capacity of the storage battery 113 has reached 10% of the full charge amount of the storage battery 113. That is, it is determined whether or not the condition of C = 0.1 × A (full) is satisfied (step S315). When this condition is satisfied, the charging control unit 112 controls to stop charging by the AC charger (step S307). On the other hand, if this condition is not satisfied, the process returns to step S314 to continue charging by the AC charger.

  According to the processes of FIGS. 8 to 9, since the charging by the AC charger is performed using the charging threshold value, the charging amount by the AC charger can be minimized, and the environmental load is minimized. be able to. In addition, since the remaining capacity of the storage battery 113 is adjusted so as not to fall below 10%, even if the user's lifestyle changes and the charge amount by the solar battery 111 is less than the predicted charge amount, the charge amount is insufficient. Can be avoided.

  According to such a portable terminal device 100 in the present embodiment, when the device itself moves frequently while actively using the power generated by solar power generation and suppressing the use of power from a commercial power source such as an AC power source. Even so, it is possible to avoid a shortage of charge.

(Second Embodiment)
FIG. 10 is a block diagram illustrating a configuration example of the mobile terminal device according to the second embodiment of the present invention. 10 includes a control unit 101, an antenna unit 102, a radio unit 103, a display unit 104, a position information detection unit 105, a memory 106B, an operation unit 107, a speaker 108, a microphone 109, a receiver 110, and a solar cell. 111, a charge control unit 112, a storage battery 113, an adapter connection unit 114, and an illuminance amount detection unit 115. In the mobile terminal device 100B illustrated in FIG. 10, the same components as those of the mobile terminal device 100 illustrated in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  The illuminance amount detection unit 115 has a function as an illuminance sensor that detects the illuminance amount of sunlight per unit area irradiated on the solar cell 111.

  In addition to the information stored in the memory 106, the memory 106B has an illuminance indicating a relationship between an illuminance amount to the solar cell 111 at the charging position and a charge amount to the storage battery 113 by the solar cell 111 at the illuminance amount. Amount-charge amount table is maintained.

Next, the operation of the mobile terminal device 100B will be described.
Similar to the mobile terminal device 100, the mobile terminal device 100 </ b> B performs a charging threshold determination process in the power saving charging mode and a charging process using an AC charger. The charging process by the AC charger is the same as the process described in the first embodiment.

  FIG. 11 is a flowchart illustrating an operation example for the mobile terminal device 100B to determine the charging threshold value in the power saving charging mode. In the process shown in FIG. 11, not the charge amount but the illuminance amount is stored as a sample.

  First, the wireless unit 103 receives weather forecast information related to the weather forecast from an external server (not shown), and the control unit 101 stores the weather forecast information in the memory 106 as a sample (step S401). Subsequently, the position information acquisition unit 105 acquires the position information of the mobile terminal device 100 via the wireless unit 103, and the control unit 101 stores the position information in the memory 106 as a sample (step S402). Subsequently, the illuminance amount detection unit 115 detects the illuminance amount in the solar cell 111, and the control unit 101 stores the illuminance amount information relating to the illuminance amount as a sample in the memory 106 (step S403).

  Note that in steps S401 to S403, the samples of weather forecast information, position information, and illuminance amount information are acquired and stored in the memory 106, but the timing is arbitrary, for example, every 30 minutes. Moreover, although the period (sample period) which acquires said sample etc. is also arbitrary, it is 4 weeks, for example. Further, the control unit 101 may acquire the charging date / time information related to the charging date / time, for example, and store it in the memory 106.

  Subsequently, the control unit 101 determines whether or not a predetermined sample period (for example, 4 weeks) has elapsed after starting acquisition of each sample in steps S401 to S403 (step S404). If the predetermined sample period has not elapsed, the process returns to step S401.

  When a predetermined sample period has elapsed from the start of acquisition of each sample or the like, the control unit 101 predicts a charge amount when the storage battery 113 is charged by the solar cell 111 based on each sample (step S405). . For example, the positional information acquired by GPS or the like, and the illuminance amount information related to the illuminance amount when the storage battery 113 is charged by the solar battery 111 at the position related to the positional information are acquired and stored in the memory 106. By referring to the illuminance amount-charge amount table, the charge amount at the acquisition timing at the position can be known. Further, by integrating the charge amount converted using the illuminance amount-charge amount table from the regularly acquired illuminance amount, for example, the charge amount per day can be known. Based on the information on the amount of charge, when performing the same action as that day, that is, when going to the same place, it can be predicted that the amount of charge will be the same.

  Subsequently, the control unit 101 determines a charging threshold value in the power saving charging mode based on the predicted charging amount (predicted charging amount) (step S406). The charging threshold may be determined every day of the week, every hour, or every other specific period (weekdays, weekends, etc.).

  According to such portable terminal device 100B in this embodiment, even by holding the amount of illuminance as a sample instead of the amount of charge, the power from solar power generation is actively used, and a commercial power source such as an AC power source is used. Even if the device itself moves frequently while suppressing the use of power, it is possible to avoid a shortage of charge.

  The control unit 101 may detect the surface (solar cell surface) on which the solar cell 111 is provided based on the illuminance amount detected by the illuminance amount detection unit 115. In this case, when the illuminance amount detection unit 115 detects a state in which the solar cell surface does not face the sun and faces downward, the control unit 101 stores the charge amount stored in the memory 106. The predicted charge amount may be estimated to be smaller than the past charge amount related to the information.

  In the present embodiment, the charge amount is predicted after the illuminance is converted using the illuminance amount-charge amount table. However, the present invention is not limited to this. For example, the illuminance amount may be converted into the charge amount by a calculation formula without using a table. Moreover, it is good also as calculating | requiring estimated charge amount by not converting individual illumination intensity into charge amount, but processing the information of each illumination intensity directly with a table or a calculation formula. That is, the charge amount may be predicted using the illuminance amount instead of the charge amount in the first embodiment.

(Other variations)
The present invention has been described based on the first embodiment and the second embodiment. However, the present invention is not limited to those described in the above embodiments. The following modifications are also included in the present invention.

  In each embodiment mentioned above, the charge amount by the solar cell 111 was estimated using the charge amount or illuminance amount measured in the past at the same position. However, it is not limited to this. For example, even if the positions are far from each other, if the correlation between the weather and the charge amount is similar, the charge amount by the solar cell 111 may be predicted using the position information.

  Moreover, in each embodiment mentioned above, although the charge amount etc. were memorize | stored based on the date, it is not restricted to this. For example, the charge amount may be stored in different units such as seconds or years. That is, the unit is not limited as long as the amount of charge for each time can be stored.

  Moreover, in each embodiment mentioned above, although statistics, such as charge amount, were taken for every day of the week, it is not restricted to this. For example, instead of taking statistics for every fixed period such as a day of the week, statistics such as charge amount may be taken in irregular units based on other criteria. For example, it may be possible to collect statistics on the amount of charge at the same time that was close to today's weather.

  Moreover, in each embodiment mentioned above, although the measurement result, such as the charge amount for every predetermined unit time, was equalized using the correction coefficient defined based on the weather, it is not restricted to this. For example, leveling may be performed for a unit in which a plurality of unit times are combined, or the sum of the charging amount at all times may be corrected using a correction coefficient determined based on weather corresponding to all times. .

  Each functional block used in the description of the above embodiment is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. The name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.

  Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. An FPGA (Field Programmable Gate Array) that can be programmed after manufacturing the LSI, or a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.

  Furthermore, if integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology. Biotechnology can be applied.

  Moreover, you may combine embodiment mentioned above and its modification.

  The present invention is a charge control capable of avoiding a shortage of charge even when the apparatus itself moves frequently while actively using the power generated by solar power generation to suppress the use of power from a commercial power source. It is useful for a device, a charge control method, a charge control program, and the like.

100, 100B Mobile terminal device 101 Control unit 102 Antenna unit 103 Wireless unit 104 Display unit 105 Position information acquisition unit 106, 106B Memory 107 Operation unit 108 Speaker 109 Microphone 110 Receiver 111 Solar cell 112 Charge control unit 113 Storage battery 114 Adapter connection unit 115 Illuminance detection unit

Claims (11)

A charge control device for controlling charging of a secondary battery,
A solar battery for charging the secondary battery;
A position information acquisition unit that acquires position information related to the position of the charge control device;
A storage unit that stores position information acquired by the position information acquisition unit, and charge amount information related to a charge amount of the secondary battery charged by the solar battery at a position related to the position information;
Among the information stored in the storage unit, the position information related to a position corresponding to a planned charging position that is a position where the secondary battery is charged by the solar battery, and the charge amount information related to the position information; Based on, a charge amount prediction unit that predicts a charge amount by the solar cell at the planned charge position,
A charge control device comprising: The charge control device according to claim 1,
The storage unit relates to the position information, charge time information related to a charge time when the secondary battery is charged by the solar battery at a position related to the position information, and a charge amount of the charge time at the position. Memorize charge amount information,
The charge amount prediction unit is a charge scheduled time which is a time at which the secondary battery is charged by the solar cell and the position information related to the same position as the planned charge position among the information stored in the storage unit The charge amount by the solar cell at the scheduled charge time at the planned charge position based on the charge time information related to the time corresponding to the charge information and the charge amount information related to the position information and the charge time information. Predictive charge control device. The charge control device according to claim 2,
The storage unit stores the charging time information divided for each group,
The charge amount prediction unit performs a statistical process on the charge amount related to the charge time information of the same group, and based on a result of the statistical process, the solar cell at the scheduled charge time at the planned charge position Charge control device that predicts the amount of charge due to the. The charge control device according to claim 1,
The storage unit includes the position information, a correction coefficient determined based on weather forecast information related to a weather forecast when the secondary battery is charged by the solar battery at a position related to the position information, and the position. Storing the charge amount information related to the charge amount in the case of the weather forecast,
The charge amount prediction unit includes the position information related to the position corresponding to the planned charging position and the weather forecast when the secondary battery is charged by the solar battery among the information stored in the storage unit. Charging by the solar cell in the case of the weather forecast at the planned charging position based on the correction coefficient determined based on the weather forecast information and the charge amount information related to the position information and the weather forecast information Charge control device that predicts the amount. The charge control device according to claim 1,
The charge amount prediction unit assumes that the charge amount at a position different from the position related to the other position information stored by the storage unit is smaller than the charge amount related to the charge amount information related to the different position, A charge control device that predicts a charge amount by the solar battery at a charge planned position. The charge control device according to claim 5,
The charge amount prediction unit excludes charge amount information at a position different from a position related to other position information from among the charge amount information stored by the storage unit, and the solar cell at the planned charge position Charge control device that predicts the amount of charge due to the. The charge control device according to claim 1, further comprising:
It has an illuminance sensor that detects the amount of illuminance,
The storage unit stores illuminance amount information related to the illuminance amount detected by the illuminance sensor at a position related to the position information,
The charging amount prediction unit is configured to charge the charging unit based on the position information related to a position corresponding to the planned charging position and the illuminance amount information related to the position information among the information stored in the storage unit. A charge control device for predicting a charge amount by the solar cell at a planned position. The charge control device according to claim 1, further comprising:
A charge threshold value determination unit that determines a charge threshold value for controlling the charge amount other than the solar battery based on the full charge amount of the storage battery and the charge amount by the solar battery predicted by the charge amount prediction unit. A charge control device comprising: The charge control device according to claim 8,
The charging threshold value determination unit stores a predetermined threshold value for the charging amount of the storage battery, and a remaining amount obtained by subtracting the charging amount by the solar battery predicted by the charging amount prediction unit from the full charging amount is the predetermined amount. The charging control device that determines the charging threshold to be the predetermined threshold when the threshold is less than the threshold. Obtaining position information related to a position of a charge control device that controls charging of the secondary battery; and
Storing the acquired position information, and charge amount information related to a charge amount of the secondary battery charged by a solar battery included in the charge control device at a position related to the position information;
Among the stored information, based on the position information related to a position corresponding to a planned charging position that is a position where the secondary battery is charged by the solar battery, and the charge amount information related to the position information. Predicting the amount of charge by the solar cell at the planned charging position;
A charge control method. On the computer,
Obtaining position information related to a position of a charge control device that controls charging of the secondary battery; and
Storing the acquired position information, and charge amount information related to a charge amount of the secondary battery charged by a solar battery included in the charge control device at a position related to the position information;
Among the stored information, based on the position information related to a position corresponding to a planned charging position that is a position where the secondary battery is charged by the solar battery, and the charge amount information related to the position information. Predicting the amount of charge by the solar cell at the planned charging position;
Charge control program for running.

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