JP2014032634A - Charge control method, charge control program, charge control system, and computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly manage a charging amount from one storage battery to the other storage battery when power is exchanged between two storage batteries.SOLUTION: The charge control method includes: a communication processing step of acquiring data about the residual amount of the second storage battery; a charge amount arithmetic processing step of arithmetically processing a charge amount from the second storage battery to the first storage battery with reference to the data on the residual amount of the second storage battery acquired by the communication processing, the data on the residual amount of the first storage battery, and the data on the amount of power consumption of the computer and the external device; and a storage battery management processing step for allowing the first storage battery to be charged from the external device on the basis of the charge amount arithmetic processing.

Description

  Embodiments described herein relate generally to a charge control method, a charge control program, a charge control system, and a computer.

  Portable electronic devices (computers) equipped with a storage battery such as a mobile phone are widely used. There is a technique of charging from an external device for charging provided with a primary battery such as a manganese battery or an alkaline battery when the remaining capacity of the storage battery mounted on them decreases.

JP 2009-65655 A

  At this time, it was a burden on the user because an external device dedicated to charging had to be carried separately.

  Therefore, in the charge control method of the present embodiment, a secondary battery is mounted on an external device having a function other than charging such as a communication function, and an appropriate charge amount from the secondary battery to the portable electronic device is calculated and calculated. And it aims at maintaining appropriately functions other than charge, such as the above-mentioned communication function, and the function of portable electronic equipment by performing charge.

This charge control method
A computer having a first storage battery, a communication interface that communicates with an external device including the second storage battery, and an arithmetic processing unit,
A communication process for obtaining data relating to the remaining capacity of the second storage battery;
From the second storage battery with reference to the data related to the remaining capacity of the second storage battery acquired by the communication process, the data related to the remaining capacity of the first storage battery, and the data related to the power consumption of the computer and the external device A charge amount calculation process for calculating a charge amount to the first storage battery;
A storage battery management process for charging the first storage battery from the external device based on the charge amount calculated by the charge amount calculation process;
Is realized.

The figure which shows an example of the charge control system of 1st Embodiment. 1 is a block diagram of a computer 10 and an external device 20 according to a first embodiment. The figure which shows an example of the data stored in communication information DB161 concerning 1st Embodiment. The figure which shows an example of the table stored in charge amount information DB162 which concerns on 1st Embodiment. The figure which shows an example of the table stored in storage battery information DB163 which concerns on 1st Embodiment. The figure which shows an example of the relationship between the remaining capacity of the 1st storage battery which concerns on 1st Embodiment, and the remaining capacity of a 2nd storage battery. The figure which shows an example of the relationship between the remaining capacity of the 1st storage battery which concerns on 1st Embodiment, and the remaining capacity of a 2nd storage battery. The figure which shows an example of the value of the remaining capacity of the 1st storage battery which concerns on 1st embodiment, and the remaining capacity before and behind charging / discharging of a 2nd storage battery. The flowchart which shows operation | movement of the charge control system which concerns on 1st Embodiment. The figure which shows an example of the relationship between the remaining capacity of the 1st storage battery which concerns on the modification of 1st Embodiment, and the remaining capacity of a 2nd storage battery. The figure which shows an example of the value of the remaining capacity of the 1st storage battery which concerns on the modification of 1st Embodiment, and the remaining capacity before and behind charge / discharge of a 2nd storage battery. The figure which shows an example of the charge control system of 2nd Embodiment. The flowchart which shows operation | movement of the charge control system which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(First embodiment)
The charge control system according to the present embodiment is a computer system that controls charging from an external device 20 including a storage battery to a storage battery included in the computer 10 based on a program group executed by the computer 10.

  FIG. 1 is a network configuration diagram of the charge control system of the present embodiment.

  In this embodiment, the computer 10 which is one of the components of the charging control system can be configured by a server group in which devices are combined via a LAN, an intranet, or the like according to a processing function.

  The communication line 1 is a network network capable of one-way or two-way communication. In the present embodiment, the communication line 1 is a wired communication network such as a LAN or an intranet, but can be replaced with various wireless communication networks.

  The power transmission line 2 is a cable that transmits power in one direction or in both directions. In the present embodiment, the power transmission line 2 is described as being wired, but it can be replaced with a wireless power transmission apparatus or system using magnetic field coupling or electric field coupling.

  The computer 10 includes a CPU 100, a RAM (RWM) 110, a communication IF 120, an input IF 130, a display IF 140, a ROM 150, a storage unit 160, a first storage battery 170, a charging IF 171 and a timer 180. It is. In addition, an IF (interface) for mounting an external storage device such as a USB memory may be provided. The computer 10 is a portable electronic device such as a mobile phone, a smart phone, or a laptop computer, and various devices such as a car navigation device.

  The computer 10 communicates with the external device 20 via the communication line 1 or wirelessly.

  The CPU 100 is an arithmetic processing unit (microprocessor) that reads each program written in advance in the ROM 150 into the RAM 110 and performs arithmetic processing. The CPU 100 can be configured by a plurality of CPU groups (microcomputers, microcontrollers) in accordance with functions. Further, a built-in memory having a RAM function may be provided in the CPU.

  A RAM (RWM) 110 is a storage area used when the CPU 100 executes a program, and is a memory used as a working area. It is suitable for temporarily storing data necessary for processing.

  The communication IF 120 is a communication device and a communication unit that exchange data with the storage battery device. For example, there is a router. In the present embodiment, the connection between the communication IF 20 and the external device 20 is described as in wired communication, but can be replaced with various wireless communication networks. Further, the connection between the communication IF 120 and the external device 20 may be performed via a network having a number capable of one-way or two-way communication.

  The input IF 130 is an interface that connects the input unit 131 and the computer 10. You may have the input control function which converts the input signal sent from the input part 131, and converts it into the signal which CPU100 can recognize. This IF is not an essential component as a terminal or the like, and may be directly connected to wiring in the computer 10.

  The input unit 131 is an input device or an input unit that performs input control such as various keyboards, buttons, and a touch panel that are generally provided in a computer device. In addition, a function of recognizing or detecting an input signal by recognizing a voice uttered by a person may be used. In the present embodiment, it is installed outside the computer 10, but may be incorporated in the computer 10.

  The display IF 140 is an interface that connects the display unit 141 and the computer 10. Display control of the display unit 141 may be performed from the CPU 100 via the display IF 140, or the computer 10 may be provided with an LSI that performs drawing processing such as a graphic board separately, and display control may be performed by this (GPU). . As a display control function, for example, there is a decoding function for decoding image data. Note that the display IF 140 may be directly connected to the computer 10 without using the display IF 140.

  The display unit 141 is an output device or output unit such as a liquid crystal display, an organic EL display, or a plasma display. In addition to the function of displaying, a function of generating sound may be provided. In this embodiment, it is installed outside the computer 10, but may be incorporated in the computer 10.

  The ROM 150 is a program memory that stores a communication program 151, a charge amount calculation program 152, and a storage battery management program 153. A non-primary storage medium that cannot write data is preferably used, but a storage medium such as a semiconductor memory that can read and write data at any time may be used. In addition, a display program that displays characters and symbols that can be recognized by a person on the display unit 141, a program that distributes information such as the amount of charge calculated by the computer 10 to the external device 20 via the communication IF 120, An information registration program for storing the acquired information such as capacity in the storage unit 160 may be stored.

  The communication program 151 is means for causing the CPU 100 to realize a function of communicating with the external device 20. The CPU 100 that has executed the communication program 151 establishes communication with the external device 20. The protocol information stored in the communication DB 161 is referred to as necessary. Further, the CPU 100 that has executed the communication program 151 transmits a request command for requesting data regarding the remaining capacity of the second storage battery stored in the external device 20. Further, the remaining capacity data of the second storage battery stored in the external device 20 is acquired and temporarily stored in the RAM 110 or stored in the charge amount information DB 162.

  The charge amount calculation program 152 is data regarding the remaining capacity of the second storage battery acquired by the CPU 100 executing the communication program 151 and data regarding the remaining capacity of the first storage battery temporarily stored in the RAM 110 or stored in the charge amount DB 162. And a means for causing the CPU 100 to realize a charge amount calculation function for calculating a charge amount from the second storage battery to the first storage battery using the computer and data relating to the power consumption of the external device.

  An example of calculation when the charge amount calculation program 152 is executed will be described with reference to FIGS.

  The remaining capacity 2.0 [Ah], the standard power consumption amount 0.40 [A], and the power supply possible time 5.0 [h], which are data related to the remaining capacity of the first storage battery mounted on the computer 10, are read from the DB 162.

  Similarly, the remaining capacity of the second storage battery mounted on the external device 20 is 3.0 [Ah], the standard power consumption is 0.20 [A], and the power supply possible time is 15 [h].

  Thereafter, the difference between the power supply possible time of the second storage battery and the time during which both can be driven (broken line in FIG. 7) is set as an unknown number x, and is calculated.

in this case,
(0.20x × 2.0) [Ah] /0.40 [A] =
(3.0-0.20x) [Ah] /0.20 [A] (Equation 1)
And the equation holds.

Solving this equation gives
x = 20 / 3≈6.7 [h] (Expression 2)
(Rounded off to the second decimal place).

When this x [h] is multiplied by the standard power consumption of the second storage battery to calculate the charge amount y [Ah] from the second storage battery to the first storage battery,
y [Ah] = 6.7 [h] × 0.20 [A] ≈1.3 [Ah] (Equation 3)
(Rounded to the first decimal place).

  Note that a program for calculating the power supply possible time 5.0 [h] from the remaining capacity 2.0 [Ah] and the standard power consumption amount 0.40 [A] may be included. Further, the standard specification power may be calculated from the past power consumption instead of the standard power consumption. The unknown number x is not limited to this, and the difference between the power supply possible time of the first storage battery and the time during which both can be driven (broken line in FIG. 7) may be x. Moreover, although the fraction is converted into the decimal in (Equation 2), it may be calculated as a fraction or may be two or more significant digits.

  The storage battery management program 153 is a means for causing the CPU 100 to realize a storage battery management function for charging the second storage battery of the external device from the second storage battery to the first storage battery based on the charge amount y [Ah] calculated by the charge amount calculation process. . In order to prevent overcharging, a method of charging using a value obtained by multiplying the charge amount y of the first storage battery by a value of 1 or less such as 0.9 may be used.

  The CPU 200 of the external device 20 has a charge / discharge control function, notifies the charge amount y [Ah], and charges the first storage battery with the charge amount. When the total value of the electric power discharged from the second storage battery reaches the above-mentioned charge amount y without having or performing a control function for controlling the discharge amount on the second storage battery side, the CPU 100 is connected to the power transmission line. The power transmission via 2 may be terminated.

  The storage unit 160 is a non-volatile storage device such as a hard disk drive (HDD) or storage means. In addition, various storage media such as a semiconductor memory (flash memory, ReRAM, MRAM, SSD) may be used without being limited to the non-volatile storage means, or a system in which these semiconductor memories are combined with an HDD. May be a storage medium. In the present embodiment, the ROM 150 and the storage unit 160 are described as different storage media, but the ROM and the storage unit may be combined into one storage unit and storage unit.

  The storage unit 160 stores a communication information DB 161, a charge amount information DB 162, and a storage battery information DB 163. In addition, data necessary for the arithmetic processing by the CPU 100 is stored.

  The communication information DB 161 stores communication information necessary for the computer 10 and the external device 20 to communicate with each other. For example, an identification number, encryption information, and port information for authenticating each other's devices. These pieces of information are stored linked to the header information as shown in FIG.

  The charge amount information DB 162 stores information related to the second storage battery sent from the external device 20. For example, the information regarding a 1st storage battery and a 2nd storage battery is stored in a table format as described in FIG.

  The storage battery information DB 163 manages information necessary for managing charge / discharge of the storage battery. For example, as shown in FIG. 5, information related to the charge amount calculated by the CPU 100 executing the charge amount calculation program 152 and / or the time for charging the charge amount according to the product specifications is stored. For example, data relating to the charge amount and / or the charge time is stored in a table format as shown in FIG.

  The storage battery 170 is a secondary battery such as a Li ion battery. In addition, it may be a secondary battery such as a lead storage battery, a Nid battery, or a NiMH battery. In the present embodiment, this is referred to as a first storage battery.

  The charging IF 171 is a charging IF that charges the storage battery 170. Charging to the storage battery 170 is started in accordance with a command from the CPU 100, and is finished. Moreover, the aspect which can be combined with the charge from not only the charge from the external apparatus 20 but another commercial system | strain may be sufficient.

  The timer 180 counts time. Using this counted time, the data is linked and the charging time is managed.

  The external device 20 is a device having a function of causing the computer 10 to connect to the Internet via a wireless LAN. The external device 20 includes a CPU 200, a RAM (RWM) 210, a communication IF 220, an input IF 230, a display IF 240, a ROM 250, a storage unit 260, a storage battery 270, a timer 280, and a communication IF 290. . In addition, an IF (interface) for mounting an external storage device such as a USB memory may be provided. Components having the same names as the constituent elements included in the computer 10 have the same functions and will not be described.

  The ROM 250 stores a communication program 251 and a storage battery management program 252.

  The communication program 251 is means for causing the CPU 200 to realize a function of communicating with the computer 10. The CPU 200 is caused to realize a function of establishing communication corresponding to the CPU 100 that has executed the communication program 151.

  The storage battery management program 252 is means for causing the CPU 200 to realize a function of managing the discharge amount of the second storage battery. The CPU 200 that executes the storage battery management program 252 acquires information on the charge amount (discharge amount) and / or charge (discharge) time sent from the computer 10 and manages the discharge amount from the discharge IF 272.

  The storage unit 260 includes a communication information DB 261 and a storage battery information DB 262.

  The communication information DB 261 stores communication information necessary for the computer 10 and the external device 20 to communicate. For example, an identification number, encryption information, and port information for authenticating each other's devices.

  The storage battery information DB 262 stores information related to the discharge control of the second storage battery by the storage battery management program 252.

  The storage battery 270 is a secondary battery such as a Li ion battery. In addition, it may be a secondary battery such as a lead storage battery, a Nid battery, or a NiMH battery. Since the external device 20 needs to operate even when it supplies power to the computer 10, the storage capacity of the storage battery 270 is preferably larger than that of the storage battery 170. In order to improve the quick charge characteristics, a battery including iron olivicate in the positive electrode and a battery including lithium titanate in the negative electrode are suitable.

  The quick charging IF 271 is a charging IF that charges the storage battery 270. Charging to the storage battery 170 is started and terminated according to a command from the CPU 200. If rapid charging is possible, it is particularly suitable when there is not enough time to charge the storage battery 170.

  The discharge IF 272 controls the discharge from the second storage battery based on a command from the CPU 200 and / or the computer 10. A voltage dividing circuit or a boosting circuit using a resistance element, a conductor, an inductor, a transistor, or other semiconductor may be provided in accordance with the charging / discharging specifications of the first storage battery and the second storage battery.

  The timer 280 counts time. Using this counted time, the various data are linked, and the charge time and discharge time are managed.

  The communication IF 290 performs communication with the public wireless LAN and mediates communication between the computer 10 and the Internet line.

  Next, operation | movement of the charge control system of this embodiment is demonstrated using FIG.

  FIG. 9 is a flowchart showing the operation of the charge control system of the first embodiment.

(Step S <b> 101) The computer 10 executes the communication program 151 and establishes communication with the external device 20.

(Step S <b> 201) The external device 20 executes the communication program 251 and establishes communication with the computer 10.

(Step S102) The computer 10 has the remaining capacity of the second storage battery in the external device 20 when a flag for starting the charge amount calculation is set, such as when a request for charging the first storage battery from the second storage battery is received from the input unit 131. Request data.

(Steps S202 and S203) The external device 20 receives this request and transmits the remaining capacity data of the second storage battery to the computer 10.

(Step S103) The computer 10 receives the remaining capacity data of the second storage battery.

(Step S104) The computer 10 executes the charge amount calculation program 152, and calculates the charge amount from the external device 20 to the computer 10 using the remaining capacity data of the first storage battery and the remaining capacity data of the second storage battery. To do.

(Step S105—NO) When the charge amount from the second storage battery to the first storage battery calculated in S104 is 0 or less, the computer 10 ends the present process.

(Steps S105-YES, S106) When the amount of charge from the second storage battery to the first storage battery calculated in S104 is greater than 0, the computer 10 transmits a discharge start command to the external device 20.

(Steps S <b> 204 and S <b> 205) The external device 20 receives a discharge start command and transmits power to the computer 10 via the discharge IF 272.

(Step S107) The computer 10 executes the storage battery management program 153 and charges the first storage battery via the charging IF 171.

(Step S108) The computer 10 determines whether or not the charging is completed based on the amount of charge or the charging time.

(Steps S108-YES, S109, S110) The computer 10 notifies the charging IF 171 of the completion of charging and terminates charging. Also, the external device 20 is notified and the discharge is terminated.

(Steps S206 and S207) The external device 20 detects that the charging IF 171 has finished charging, or receives the notification from the computer 10 and ends the discharge from the discharge F272.

  Note that the user may be notified of this by executing a function of displaying on the display unit 141 that the process is terminated in S105-NO. Also, instead of the condition “charge amount is greater than 0 (>), charge amount is 0 or less (≦)”, “charge amount is 0 or more (≧), charge amount is less than 0 (<)” Conditions are interchangeable.

  In this way, the above-mentioned communication function, etc. can be obtained by mounting a secondary battery on an external device having a function other than charging, such as a communication function, and calculating and calculating an appropriate charge amount from the secondary battery to the portable electronic device. The user can use the functions other than charging and the functions of the portable electronic device for a longer time.

  In addition, since it is a process that averages the remaining capacity of two storage batteries, charging in a state where the risk of overcharge exceeding the full charge amount to one of the storage batteries or overdischarge of the other battery is extremely low. Discharging can be realized.

(Modification of the first embodiment)
The charge control system of this embodiment calculates the charge amount in consideration of the loss due to charging.

  DB162 of this embodiment stores the charging efficiency from the second storage battery to the first storage battery. For example, loss due to magnetic field coupling, electric field coupling, and loss due to a discharge circuit. In the present embodiment, these are collectively expressed as charging efficiency, but a plurality of values may be stored, and the charging efficiency is determined by a mathematical formula in which a plurality of values depend on each other. Also good.

  The CPU 100 that executes the charge amount calculation program 152 of the present embodiment has a remaining capacity of 2.0 [Ah] that is data related to the remaining capacity of the first storage battery mounted on the computer 10 and a standard power consumption of 0.40 [A]. From the DB 162, the power supply possible time 5.0 [h] and the charging efficiency 0.80 are read out.

  Similarly, the remaining capacity of the second storage battery mounted on the external device 20 is 3.0 [Ah], the standard power consumption is 0.20 [A], and the power supply possible time is 15 [h].

  Thereafter, the difference between the power supply possible time of the second storage battery and the time during which both can be driven (broken line in FIG. 7) is set as an unknown number x, and is calculated.

In this case, as shown in FIG. 10, (0.8 × 0.20 ×× 2.0) [Ah] /0.40 [A] =
(3.0-0.20x) [Ah] /0.20 [A] (Equation 1)
And the equation holds.

Solving this equation gives
x = 50 / 7≈7.1 [h] (Expression 2)
Is calculated.

When this x [h] is multiplied by the standard power consumption of the second storage battery to calculate the charge amount y [Ah] from the second storage battery to the first storage battery,
y [Ah] = 7.1 [h] × 0.20 [A] ≈1.4 [Ah] (Equation 3)
(Rounded to the first decimal place).

  This 1.4 [Ah] is multiplied by a charging efficiency of 0.80 to calculate that the charge amount to the first storage battery is 1.1 [Ah].

  The charge / discharge amount from the external device 20 to the computer 10 is controlled using this value.

  By performing charging in consideration of the charging efficiency in this way, it is possible to obtain and control both usable times more accurately.

(Second Embodiment)
The charge control system of this embodiment will be described with reference to FIG. The charge control system of this embodiment differs in control when the amount of charge from the second storage battery to the first storage battery in step S105 of the first embodiment is 0 or less (less than 0).

  When the CPU 100 that executes the charge amount calculation program 152 calculates that the charge amount from the second storage battery to the first storage battery is 0 or less, the storage battery management program 153 of the present embodiment changes from the first storage battery to the second storage battery. Charge the battery.

  In the present embodiment, a charge / discharge IF 171A that can be charged / discharged is provided instead of the charge IF 171 of the first embodiment.

  In this embodiment, instead of the discharge IF 272 of the first embodiment, a charge / discharge IF 272A that can be charged and discharged is provided.

  These charge / discharge IFs are described as one element, but instead, the computer 10 may be provided with a charge IF and a discharge IF, and the external device 20 may be provided with a charge IF and a discharge IF. good.

  Next, operation | movement of the charge control system of this embodiment is demonstrated using FIG.

  FIG. 9 is a flowchart showing the operation of the charge control system of the first embodiment.

  Since the operations from step S101 to step S104 are the same as those in the first embodiment, a description thereof will be omitted.

(Steps S105-NO, S306) When the charge amount from the second storage battery to the first storage battery calculated in S104 is 0 or less, the computer 10 starts discharging from the first storage battery to the second storage battery.

(Step S404) The external device 20 starts charging the second storage battery via the charge / discharge IF 272A. This charging requires less charging current and longer charging time than charging by the fast charging IF 271.

(Step S307) The CPU 100 executing the storage battery management program 153 determines whether or not the planned discharge amount has been reached.

(Step S307 -NO) The computer 10 continues discharging from the first storage battery.

(Steps S307-YES, S308, S405) The computer 10 terminates the discharge, and the external device 20 detects that the charge / discharge IF 171A has terminated the charge or receives a notification from the computer 10 and starts the charge / discharge F272A. End charging.

  Note that the user may be notified of this by executing a function of displaying on the display unit 141 that the process is terminated in S105-NO. Further, instead of the condition “the charge amount is greater than 0 and the charge amount is 0 or less”, the condition “the charge amount is 0 or more and the charge amount is less than 0” may be used.

  Further, in the present embodiment, the discharge amount is managed by the computer 10. However, even if the storage amount management is performed by the storage battery management program 152 of the external device 20 and the charge amount from the computer 10 is controlled. Good.

  In this way, a secondary battery is mounted on an external device having a function other than charging, such as a communication function, and an appropriate amount of charge from the secondary battery to the portable electronic device is calculated and calculated. When the battery capacity is insufficient, the user can use the functions other than charging such as the communication function and the functions of the portable electronic device for a longer time by allowing the computer 10 to discharge the battery. .

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. For example, the computer 10 includes a car navigation device provided in a two-wheeled vehicle, a three-wheeled vehicle, and a four-wheeled vehicle. The external device 20 includes a mobile phone and a personal computer connected to these devices. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Communication line 10 ... Computer 20 ... External apparatus 100, 200 ... CPU (Central Processing Unit) (arithmetic processing part)
110, 210 ... RAM (RWM) (Random Access Memory) (Read Write Memory)
120, 220 ... Communication IF (inter face)
130, 230 ... input units 131, 231 ... input IF
140, 240 ... display units 141, 241 ... display IF
150, 250 ... ROM (Read Only Memory)
151 ... Communication program 152 ... Charge amount calculation program 153 ... Storage battery management program 251 ... Communication program 252 ... Storage battery management program 160, 260 ... Storage unit 161, 261 ... Communication information DB (data base)
162 ... Charge amount information DB
163, 262 ... Storage battery information DB

Claims (11)

A computer having a first storage battery, a communication interface that communicates with an external device including the second storage battery, and an arithmetic processing unit,
A communication process for obtaining data relating to the remaining capacity of the second storage battery;
From the second storage battery with reference to the data related to the remaining capacity of the second storage battery acquired by the communication process, the data related to the remaining capacity of the first storage battery, and the data related to the power consumption of the computer and the external device A charge amount calculation process for calculating a charge amount to the first storage battery;
A storage battery management process for charging the first storage battery from the external device based on the charge amount calculated by the charge amount calculation process;
Charge control method that realizes. The charge amount calculation process includes:
2. The charge amount control method according to claim 1, further comprising: calculating a charge amount from the second storage battery to the first storage battery with reference to data relating to charging efficiency from the second storage battery to the first storage battery. The storage battery management process includes:
The charge amount control method according to claim 1, wherein the charge amount is less than the charge amount. The charge amount control method according to claim 1, wherein the storage capacity of the second storage battery is larger than the storage capacity of the first storage battery. The charge amount control method according to claim 1, wherein a charging time of the second storage battery is shorter than a charging time of the first storage battery. The charge amount control method according to claim 1, wherein an output voltage of the second storage battery is lower than an output voltage of the first storage battery. The charge amount control method according to claim 1, wherein the external device is a wireless LAN communication terminal. The charge control method according to claim 1, wherein the storage battery management process discharges the first storage battery to the external device based on the charge amount calculated by the charge amount calculation process. A charge control program for controlling a charge from a second storage battery provided in an external device to a first storage battery provided in the computer to a computer provided with a CPU that reads out data from a ROM and performs arithmetic processing,
In the CPU,
A communication function for acquiring the remaining capacity of the second storage battery;
Refer to the remaining capacity data of the second storage battery acquired by the communication process, the remaining capacity data of the first storage battery, and the data regarding the power consumption of the computer and the external device from the second storage battery. A charge amount calculation function for calculating the charge amount to the storage battery,
A storage battery management function for charging the first storage battery from the external device based on the charge amount calculated by the charge amount calculation process;
Charge amount control program that realizes. A communication network for communicating data;
An external device comprising a second storage battery;
A first storage battery,
A communication function for acquiring the remaining capacity of the second storage battery;
Refer to the remaining capacity data of the second storage battery acquired by the communication process, the remaining capacity data of the first storage battery, and the data regarding the power consumption of the computer and the external device from the second storage battery. A charge amount calculation function for calculating the charge amount to the storage battery,
A storage battery management function for charging the first storage battery from the external device based on the charge amount calculated by the charge amount calculation process;
A charge control system comprising: Communication means for acquiring the remaining capacity of the second storage battery;
Refer to the remaining capacity data of the second storage battery acquired by the communication process, the remaining capacity data of the first storage battery, and the data regarding the power consumption of the computer and the external device from the second storage battery. A charge amount calculating means for calculating a charge amount to the storage battery;
Storage battery management means for charging the first storage battery from the external device based on the charge amount calculated by the charge amount calculation process,
A computer comprising:

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