JP2016059196A - Battery type electronic device and method of charging secondary battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery type electronic device capable of suppressing deterioration in a secondary battery by avoiding full charge without deteriorating conveniences of a user, even if user's schedule is not registered, and a method of charging a secondary battery.SOLUTION: A charging section 2 supplies input charging power during a charge command signal is input thereby to charge a secondary battery, a battery residual amount measurement section 4 outputs battery residual amount information as a result of the measurement of a residual amount of the secondary battery at the current time point, and a control section 3 supplies the charge command signal to the charging section 2 during a period needed until a residual amount of the secondary battery reaches a target charge capacity which corresponds to a used amount of the secondary battery during a predetermined second period, the used amount being determined on the basis of the battery residual amount information to be input, on at least one time point before an integral multiple of a predetermined first period.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a battery-type electronic device and a method for charging a secondary battery, and more particularly to a battery-type electronic device capable of suppressing deterioration of a secondary battery and a method for charging a secondary battery.

  Battery-powered electronic devices including portable information devices such as mobile phones and smartphones operate on the power of a secondary battery such as a built-in lithium ion battery. A user usually connects a battery-powered electronic device to a commercial AC power supply via a predetermined charger, and charges a secondary battery built in the battery-powered electronic device. It is generally known that the secondary battery has a different degree of deterioration depending on the charging method, and thus the life greatly changes. One of the factors that deteriorate the secondary battery is to leave it connected to the charger in a state near full charge. The secondary battery in the left state keeps the full charge by frequently repeating the discharge to cover the power consumption generated during the left period and the charge to supplement the discharge. Since the secondary battery deteriorates every time charging / discharging is repeated, the deterioration of the secondary battery further progresses when the secondary battery is left in this state.

  A technique for avoiding a state near the full charge of the secondary battery is disclosed in Patent Document 1. The portable information device disclosed in Patent Literature 1 includes a secondary battery, a power supply unit, a schedule recording unit, a charge state optimization planning unit, and a power supply control unit. The power supply unit converts power from the external power supply or the secondary battery into predetermined DC power, and charges the secondary battery with the power from the external power supply. The schedule recording unit records the user's schedule. The charge state optimization planning unit determines an optimization plan related to the charge state of the secondary battery according to the schedule. A power supply control part sets charging / discharging conditions based on an optimization plan, and controls charging / discharging of the secondary battery by a power supply part according to the charging / discharging conditions.

  In this portable information device, first, a schedule recording unit records a user's schedule. The schedule describes a user's action schedule indicating a business trip, holiday, or vacation according to the date.

  Next, the charge state optimization plan unit determines an optimization plan related to the charge state of the secondary battery according to the schedule recorded in the schedule recording unit. That is, according to the schedule, a use schedule indicating the battery drive frequency (high / low) of the portable information device and the battery drive operation time (long / short) is estimated, and the secondary battery is controlled according to the estimated use schedule. Determine the target state of charge. The control target of the secondary battery is the following three types A to C.

  A. When the battery drive frequency is high and the operation time is long, the control target is fully charged. B. Although the frequency of battery driving is high, when the operation time is short, the control target is set to 50 to 80% of the battery capacity at full charge. C. When the battery driving frequency is low and the operation time is short, the control target is set to 20 to 80% of the battery capacity at full charge.

  Finally, the power supply control unit controls the charging of the secondary battery by the power supply unit according to the charge / discharge conditions (control target) determined by the charge state optimization planning unit.

  Thus, when the battery drive operation time is short, the state of charge is maintained sufficiently lower than the full charge, and the deterioration of the secondary battery is suppressed.

JP 2004-94607 A

  The portable information device disclosed in Patent Document 1 described above estimates the use schedule of the secondary battery based on the schedule indicating the user's action schedule, and performs the secondary operation according to the control target of the secondary battery determined based on the estimated use schedule. Charge the battery. At this time, when the estimated use schedule is short in the battery driving operation time, the charging state is charged so as to be sufficiently lower than the full charge to suppress the deterioration of the secondary battery.

  As described above, the portable information device disclosed in Patent Document 1 requires a schedule indicating the user's action schedule in order to charge the charged state to be lower than the full charge when the battery-driven operation time is short. To do. For this reason, there is a problem that the user needs to register the schedule. In addition, if you forget to register the schedule or make an incorrect registration, it may not be possible to charge the battery so that the state of charge is lower than the full charge. There is a problem that it may not be possible.

  The object of the present invention is to solve the above-mentioned problems, and even without registering the user's schedule, the battery-powered electronic device that can avoid the full charge and suppress the deterioration of the secondary battery without impairing the user's convenience It is providing the charge method of an apparatus and a secondary battery.

  The battery-powered electronic device of the present invention is a battery-powered electronic device driven by a secondary battery, and charges the secondary battery by supplying input charging power while a charging instruction signal is input. A charging unit, a battery remaining amount measuring unit that outputs battery remaining amount information that is a result of measuring the remaining amount of the secondary battery at the present time, and at least one time point before an integer multiple of a predetermined first period The period required for the remaining amount of the secondary battery to reach the target charge capacity corresponding to the usage amount of the secondary battery in the predetermined second period, obtained based on the input remaining battery amount information. And a control unit for supplying the charging instruction signal to the charging unit.

  The charging method of the secondary battery of the present invention is a charging method of the secondary battery included in the battery-powered electronic device driven by the secondary battery, and is a result of measuring the remaining amount of the secondary battery at the present time. Based on a certain remaining battery amount information, the usage amount of the secondary battery in a predetermined second period is obtained at at least one time point before an integral multiple of the predetermined first period, and this usage amount is supported. The secondary battery is charged until it reaches the target charge capacity to reach the remaining amount of the secondary battery.

  According to the present invention, there is provided a battery-powered electronic device capable of avoiding full charge and suppressing deterioration of a secondary battery without impairing user convenience without registering a user's schedule, and a secondary battery. A charging method can be provided.

It is a figure which shows an example of the battery-type electronic device which concerns on the 1st Embodiment and 2nd Embodiment of this invention. It is a figure which shows an example of the battery-type electronic device which concerns on the 3rd Embodiment and 4th Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the battery-type electronic device which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the log | history of the usage-amount every day of the secondary battery of the battery-powered electronic apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the log | history of the last battery remaining amount for every day of the secondary battery of the battery-powered electronic apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the fluctuation state over the day of the usage-amount used on the weekday of the user of the secondary battery of the battery-powered electronic device which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the fluctuation condition over the day of the usage-amount used on the user's holiday of the secondary battery of the battery-powered electronic device which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the battery-type electronic device which concerns on the 4th Embodiment of this invention. It is a figure which shows an example of the log | history of the connection start time and connection time when it is connected to the charger more than predetermined time every day of the battery-powered electronic device which concerns on the 4th Embodiment of this invention.

Next, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a diagram showing an example of a battery-type electronic device according to the first embodiment and the second embodiment of the present invention.

  The battery-powered electronic device 1 according to the present embodiment includes a charging unit 2, a battery remaining amount measuring unit 4, and a control unit 3.

  FIG. 1 also shows a secondary battery. The secondary battery is a lithium ion battery or the like, and supplies power to the inside of the battery-type electronic device 1 to operate the battery-type electronic device 1. The secondary battery is built in in advance or separately installed by the user.

The battery-powered electronic device 1 includes portable information devices such as a mobile phone and a smartphone, and operates with the power of the secondary battery.
The charging unit 2 is connected to a charger, for example, and charges the secondary battery by supplying charging power input from the charger to the secondary battery while the charging instruction signal is input.

  The battery remaining amount measuring unit 4 outputs battery remaining amount information which is a result of measuring the remaining amount of the secondary battery at the present time.

  The control unit 3 sets the usage amount of the secondary battery in the predetermined second period obtained based on the remaining battery level information input from the remaining battery level measurement unit 4 to the target charging capacity corresponding to this usage amount. A charging instruction signal is supplied to the charging unit 2 for a period required for the remaining amount of the secondary battery to reach.

  Next, the operation of the battery-type electronic device of the present embodiment will be described.

  A secondary battery in a predetermined second period based on the battery remaining amount information input from the battery remaining amount measuring unit 4 at at least one time point by an integral multiple of the predetermined first period by the control unit 3 Find the amount of use. Then, a charging instruction signal is supplied to the charging unit 2 for a period required for the remaining amount of the secondary battery to reach the target charging capacity corresponding to the usage amount. The predetermined first period is, for example, week, 10 days, month, etc., and is not limited thereto. The predetermined second period is, for example, a day.

  As described above, according to the first embodiment of the present invention, the target battery capacity corresponding to the usage amount of the secondary battery in the predetermined second period obtained based on the battery remaining amount information is set to the secondary battery capacity. Charge until the battery level is reached.

For this reason, according to the first embodiment of the present invention, even if the user's schedule is not registered, the usage amount estimated to be used by the user is charged, so that it is fully charged without impairing the user's convenience. And the deterioration of the secondary battery can be suppressed.

(Second Embodiment)
FIG. 1 is a diagram showing an example of a battery-type electronic device according to the first embodiment and the second embodiment of the present invention.

  The second embodiment of the present invention is a more specific form of the first embodiment. A description will be given mainly of the differences from the first embodiment.

  The battery-powered electronic device 1 according to the present embodiment includes a secondary battery, a charging unit 2, a battery remaining amount measuring unit 4, and a control unit 3.

  The charging unit 2 charges the secondary battery based on the connected charger.

  The battery remaining amount measuring unit 4 monitors the secondary battery, and outputs battery remaining amount information indicating the remaining battery amount (mAh: milliampere hour) that is the capacity charged to the secondary battery at the current time based on the monitoring result. To do. The battery remaining amount information is a percentage (%) with respect to the battery capacity at the time of full charge of the battery remaining amount (mAh).

  The control unit 3 obtains the usage amount of the secondary battery for each day based on the remaining battery level information output by the remaining battery level measurement unit 4. When the charger is connected to the charging unit 2, the usage amount corresponding to the day of the week connected to the charging unit 2 is detected based on the obtained usage amount of the secondary battery, and this usage amount is determined as the target charging capacity. The charging instruction is output. Then, when the remaining battery level of the secondary battery reaches the target charging capacity, the output of the charging instruction is stopped.

  The battery charger is a device for charging a secondary battery installed in the battery-powered electronic device 1 by connecting to a commercial AC power supply, and is usually attached when the battery-powered electronic device 1 is purchased, and corresponds to the secondary battery. It is a thing. The charger is, for example, an AC adapter, converts commercial AC power into DC power, and outputs a predetermined voltage and current according to a predetermined standard. For example, in the case of the USB (Universal Serial Bus) standard, it is 5 V and outputs a current within the standard (500 mA).

  Next, the operation of the battery-type electronic device of the present embodiment will be described.

  The battery remaining amount measuring unit 4 constantly monitors charging / discharging of the secondary battery. Then, the integral value of the product (mAh) of the time (h) in which the same charging current (mA) as the current charged in the secondary battery flows, and the inside of the battery-powered electronic device 1 are supplied and consumed. The difference between the discharge current (mA) of the secondary battery and the integral value (mAh) of the product (mAh) of the discharge current (mA) and the time (h) when the same discharge current flows is always obtained. Then, the obtained difference value is set as the remaining battery level, and information indicating the remaining battery level is always output. Further, the battery remaining amount measuring unit 4 may monitor the output voltage of the secondary battery and always output the remaining battery amount information (%) obtained corresponding to this voltage. The battery remaining amount information and the battery voltage correspond one-to-one. Generally, the battery remaining amount information can be obtained by a predetermined graph in which the battery remaining amount information is associated with the battery voltage.

  The control unit 3 obtains the usage amount of the secondary battery for each day based on the remaining battery level information output by the remaining battery level measurement unit 4. That is, the control unit 3 acquires the remaining battery level information at the beginning of the day, immediately before and after charging, and at the end of the day, and from the remaining battery level information acquired at the beginning of the day, The difference between the remaining battery information acquired at the end of the day is obtained. Then, the battery capacity charged on that day is added to this difference, and the usage amount of the secondary battery for each day is obtained and stored as a history in a storage unit (not shown). Here, the charged battery capacity is the difference between the remaining battery level information immediately after charging and the remaining battery level information immediately before charging.

  Moreover, the control part 3 may calculate | require the usage-amount of the secondary battery every day as follows. That is, the control unit 3 acquires the remaining battery level information output by the remaining battery level measuring unit 4 at a predetermined cycle (for example, every 5 minutes), and the current acquisition is smaller than the previous acquisition. Based on the accumulation of the difference, the usage amount of the secondary battery for each day is obtained and stored as a history in a storage unit (not shown). The predetermined period is not limited to every 5 minutes, and may be appropriately changed depending on the situation of the battery-powered electronic device 1 such as accuracy and memory capacity of the storage unit.

  And based on a user's operation, in order to charge the secondary battery installed in the battery-powered electronic device 1, the battery-powered electronic device 1 is connected to a predetermined charger (AC adapter) connected to a commercial AC power source. . That is, the charger is connected to the charging unit 2.

  Next, the control unit 3 detects that the charger is connected to the charging unit 2 based on, for example, a predetermined voltage output from the charger. Then, based on the daily usage amount of the secondary battery stored in the storage unit (not shown), the usage amount corresponding to the day of the week connected to the charging unit 2 is detected, and this usage amount is determined as the target of the charging capacity. Set to the target charge capacity shown. Then, the control unit 3 outputs a charging instruction to the charging unit 2. The charging unit 2 connected to the charger starts a charging of the secondary battery by flowing a predetermined current (for example, a standard maximum value of 500 mA) output from the charger to the secondary battery.

  Then, when the remaining battery level of the secondary battery indicated by the remaining battery level information output by the remaining battery level measuring unit 4 reaches the target charging capacity, the control unit 3 stops outputting the charging instruction. The charging unit 2 stops charging the secondary battery.

  Thus, according to the second embodiment of the present invention, the usage amount corresponding to the day of the week connected to the charging unit based on the daily usage amount of the secondary battery obtained based on the battery remaining amount information. Is detected, and the amount of use is set as a target charging capacity, and charging is performed up to the target charging capacity. That is, the battery is charged up to a usage amount estimated to be used by the user without registering a schedule indicating the user's action schedule.

For this reason, according to the second embodiment of the present invention, even if the user's schedule is not registered, the usage amount estimated to be used by the user is charged, so that the user's convenience is not deteriorated. And the deterioration of the secondary battery can be suppressed.
(Third embodiment)
FIG. 2 is a diagram showing an example of a battery-type electronic device according to the third and fourth embodiments of the present invention.

  In the third embodiment of the present invention, the storage unit 5 and the position information acquisition unit 6 are added to the battery-powered electronic device 1 of the second embodiment, and the second embodiment is more specific. It is. A description will be given mainly of the differences from the second embodiment.

  The battery-type electronic device 1 according to the present embodiment includes a secondary battery, a charging unit 2, a battery remaining amount measuring unit 4, a control unit 3, a storage unit 5, and a position information acquisition unit 6. The

  The storage unit 5 stores the usage amount of the secondary battery for each day as a history based on the control of the control unit 3. Further, the last remaining battery level for each day is stored as a history.

  The position information acquisition unit 6 acquires position information where the battery-powered electronic device 1 is located. The position information acquisition unit 6 has, for example, a GPS (Global Positioning System) function, and acquires its own position information by this function. The location information is not limited to the information acquired by the GPS function, but, for example, in the case of a wireless LAN (Local Area Network) function using WiFi (Wireless Fidelity), the SSID (Service Set IDentifier) that is an identifier of the access point is also used. good. Further, in the case of having a communication function based on 3G (3rd Generation), a base station ID (identification) may be used, and any information can be used as long as it can be used as position information.

  The control unit 3 obtains the maximum usage amount for each day of the week based on the daily usage amount of the secondary battery stored in the storage unit 5, and the battery-powered electronic device 1 determines the maximum usage amount for each day of the week based on the positional information acquired by the positional information acquisition unit 6. When it is determined that the vehicle is in a predetermined area such as a home, the target charging capacity for each day of the week is determined based on the obtained maximum usage amount. The average usage amount may be used instead of the maximum usage amount. The target charging capacity is obtained by adding, for example, a predetermined capacity as a margin to the usage amount (maximum usage amount or average usage amount) of the secondary battery. The predetermined area such as home stores the position registered by the GPS function when the charger is plugged in when the GPS (Global Positioning System) function is provided. For example, the position where the charger was inserted in the past few days. Further, in the case of having a wireless LAN function by WiFi, a place where the SSID can be observed with a predetermined intensity may be used. Further, in the case of having a 3G communication function, it may be a place where the base station ID can be observed with a predetermined intensity. Therefore, it is not limited to home.

  The control unit 3 acquires the final battery remaining amount for each day from the battery remaining amount measuring unit 4 and stores it in the storage unit 5, and refers to the stored final battery remaining amount for each day. Based on this reference, if the final battery level on a particular day is less than the predetermined capacity lower limit threshold or greater than or equal to the predetermined capacity upper limit threshold, the margin for this specific day is The predetermined capacity added as is increased or decreased. The predetermined capacity value (margin) is an arbitrary value that may be changed as appropriate by experiment, convenience, or the like.

  On the other hand, when the control unit 3 determines that the battery-powered electronic device 1 is not in a predetermined area such as home based on the position information acquired by the position information acquisition unit 6, the control unit 3 sets a predetermined full charge capacity for the secondary battery. Set to the target charge capacity.

  In addition, the control unit 3 measures a fluctuation state of the usage amount used by the user for each day of the week and stores it in the storage unit 5. Then, when it is determined that the battery-powered electronic device 1 is not in a predetermined area such as a home based on the position information acquired by the position information acquisition unit 6, a charger is connected based on the stored usage amount fluctuation state. Find the amount of usage that will be used after the day of the week when the charger is connected. Then, the difference between the obtained usage amount and the remaining battery level when the charger is connected may be set as the target charging capacity. In this case, based on the control of the control unit 3, the storage unit 5 stores the fluctuation state of the usage amount used by the user for each day of the week for one day.

  Next, the operation of the battery-powered electronic device according to the present embodiment will be described with reference to FIGS. 3, 4, 5, 6, and 7. FIG.

  FIG. 3 is a flowchart showing an example of the operation of the battery-powered electronic device according to the third embodiment of the present invention.

  FIG. 4 is a diagram showing an example of the daily usage history of the secondary battery of the battery-powered electronic device according to the third embodiment of the present invention. The horizontal direction is the day of the week, the vertical direction is the past week, and the usage history of the secondary battery for the past four weeks from the previous day is shown. In addition, the maximum usage amount and the average usage amount are shown for each day of the week between one week and four weeks ago. The number of weeks is not limited to four weeks, and may be appropriately changed depending on the situation of the battery-powered electronic device 1 such as accuracy and memory capacity of the storage unit 5. This figure shows the usage history of the secondary battery for the past four weeks from Sunday, which is the previous day, where the current day is Monday. The unit of usage is a percentage (%) with respect to the battery capacity at full charge. For example, the usage amount of the secondary battery on Monday four weeks ago is 50%, and the usage amount of the secondary battery on Tuesday three weeks ago is 10%. In this figure, the maximum usage for each day of the week from 1 week before to 4 weeks ago is 60% on Monday, 15% on Tuesday, 5% on Wednesday, 35% on Thursday, 15% on Friday, Sunday Is 100%. In addition, the average usage for each day of the week between 1 week ago and 4 weeks ago is 47.5% for Monday, 12.5% for Tuesday, 5% for Wednesday, 25% for Thursday, This shows that Friday is 10% and Sunday is 77.5%.

  FIG. 5 is a diagram showing an example of a history of the final battery remaining amount for each day of the secondary battery of the battery-powered electronic device 1 according to the third embodiment of the present invention. The horizontal direction is the day of the week, the vertical direction is the past week, and the last remaining battery level history of the secondary battery for the past four weeks from the previous day is shown. The number of weeks is not limited to four weeks, and may be appropriately changed depending on the situation of the battery-powered electronic device 1 such as accuracy and memory capacity of the storage unit 5. This figure shows the history of the remaining battery level of the secondary battery for the past four weeks from Sunday, which is the previous day, where the current day is Monday. The unit of usage is a percentage (%) with respect to the battery capacity at full charge. O indicates that the final remaining battery level is less than a predetermined capacity lower limit threshold. Δ indicates that the final remaining battery level is equal to or greater than a predetermined capacity upper limit threshold.

  FIG. 6 is a diagram showing an example of a fluctuation state over a day of the usage amount used on weekdays of the user of the secondary battery of the battery-powered electronic device according to the third embodiment of the present invention. In this figure, the vertical axis represents the average usage, and the horizontal axis represents the time. For example, the average usage for the past four weeks corresponding to the day of the week on which the charger is connected is shown every three hours. The unit of average usage is a percentage (%) to the battery capacity at full charge. This figure shows an example of going to work or school on weekdays such as Monday and Tuesday. In this figure, it is unused from 0 (24) to 6 o'clock, 1% from 6 o'clock to 9 o'clock, 7% from 9 o'clock to 12 o'clock, 1% from 12 o'clock to 15 o'clock, 15 o'clock 2% from 18:00 to 18:00, 6% from 18:00 to 21:00, 3% from 21:00 to 24 (0), and 20% in total.

  FIG. 7 is a diagram showing an example of a fluctuation state over a day of the usage amount used on the user's holiday of the secondary battery of the battery-powered electronic device according to the third embodiment of the present invention. In this figure, the vertical axis represents the average usage, and the horizontal axis represents the time. For example, the average usage for the past four weeks corresponding to the day of the week on which the charger is connected is shown every three hours. The unit of average usage is a percentage (%) to the battery capacity at full charge. This figure shows an example when the mobile device is frequently used on a holiday such as Sunday. In this figure, it is unused from 0 (24) to 6 o'clock, unused from 6 o'clock to 9 o'clock, 20% from 9 o'clock to 12 o'clock, 10% from 12 o'clock to 15 o'clock, and 15 o'clock 10% from 18:00 to 18:00, 25% from 18:00 to 21:00, 10% from 21:00 to 24 (0), and 80% in total.

  Here, an example of the operation of the battery-powered electronic device according to the present embodiment will be described with reference to the flowchart of FIG.

  The battery-powered electronic device 1 always performs the following operation. That is, the battery remaining amount measuring unit 4 of the battery-powered electronic apparatus 1 constantly monitors charging / discharging of the secondary battery, for example, and indicates the remaining battery capacity (mAh) that is the capacity charged in the secondary battery at the present time. Information (%) is output. Further, the control unit 3 of the battery-powered electronic device 1 obtains the usage amount of the secondary battery for each day based on the battery remaining amount information output from the battery remaining amount measuring unit 4 and stores it as a history as shown in FIG. 5 is stored. Further, as shown in FIG. 5, the control unit 3 stores the final battery remaining amount for each day in the storage unit 5 as a history, based on the remaining battery amount information output from the battery remaining amount measuring unit 4. Further, the control unit 3 measures the fluctuation state of the usage amount used by the user for each day of the week and stores it in the storage unit 5. In addition, the position information acquisition unit 6 of the battery-powered electronic device 1 always acquires position information, for example.

  In step S1 of FIG. 3, the control unit 3 checks whether or not the charger is connected to the charging unit 2 based on the user's operation, and if detecting that the charger is connected to the charging unit 2, step S2 Proceed to

  In step S <b> 2 of FIG. 3, the control unit 3 determines whether or not the battery-powered electronic device 1 is in a predetermined area such as a home based on the position information acquired by the position information acquisition unit 6. If it is determined that the battery-powered electronic device 1 is in a predetermined area such as home, the process proceeds to step S3. If it is not determined that the user is in a predetermined area such as home, the process proceeds to step S4.

  In step S3 of FIG. 3, as shown in FIG. 4, the control unit 3 determines the maximum usage amount (Max (%)) for each day of the week based on the history of the usage amount of the secondary battery for each day stored in the storage unit 5. )Ask. And based on this calculated | required maximum usage-amount, the target charging capacity (T (%)) for every day of the week is determined. In other words, the margin Mar (%) is added to the maximum usage amount to determine the target charging capacity (T = Max + Mar) for each day of the week. Instead of the maximum usage amount, the average usage amount (Av (%)) may be used as the target charging capacity (T = Av + Mar). Here, when T exceeds 100% as a result of the calculation, T = 100%. That is, in this case, the charging capacity required by the user is 100% based on the past usage record of the user. Then, the process proceeds to step S5.

  The control unit 3 increases or decreases the margin used in step S3 with reference to the final battery remaining amount for each day stored in the storage unit 5 shown in FIG. That is, the control unit 3 is the current day of the week when the charger is connected to the charging unit 2, and the final remaining battery level is less than a predetermined capacity lower limit threshold (O) within the past four weeks, If the capacity is above the upper limit threshold (Δ), the margin to be used is increased or decreased. The value to be increased or decreased may be changed as appropriate by experimentation or ease of use.

  In step S4 of FIG. 3, the control unit 3 sets the full charge capacity to the target charge capacity. That is, the target charge capacity is set to 100%, and the process proceeds to step S5. The fact that the charger is connected to the battery-powered electronic device 1 in a place that is not an area such as home is highly likely that the user wants more battery capacity. For this reason, the full charge capacity is set as the target charge capacity.

  Further, as shown in FIGS. 6 and 7, the control unit 3 connected the charger based on the fluctuation state of the usage amount used by the user for each day of the week stored in the storage unit 5. Find the amount of usage that will be used after the day of the week when the charger is connected. For example, if the day of the week when the charger is connected is Monday and the time when the charger is connected is 15:00, referring to FIG. 6, the average usage amount after 15:00 is 11%. Then, the difference between 11% and the remaining battery level at the time when the charger is connected may be set as the target charging capacity.

  In step S5 of FIG. 3, the control unit 3 outputs a charging instruction to the charging unit 2, and the charging unit 2 connected to the charger has a predetermined current output by the charger (for example, a standard maximum value of 500 mA). To the secondary battery to start charging the secondary battery.

  In step S6 of FIG. 3, the control unit 3 checks whether or not the remaining battery level of the secondary battery indicated by the remaining battery level information output by the remaining battery level measuring unit 4 has reached the target charge capacity. When the battery reaches the target charging capacity, the process proceeds to step S7.

  In step S7 of FIG. 3, the control unit 3 stops the output of the charging instruction to the charging unit 2, and the charging unit 2 stops charging the secondary battery.

  In step S8 of FIG. 3, the control unit 3 notifies the user that the charging to the target charging capacity is completed, for example, by a display unit (not shown) such as an LED, and the battery-powered electronic device is based on the user's operation. The connection of the device (charging unit 2) to the charger is released and the process ends.

  At this time, if the connection of the battery-powered electronic device (charging unit 2) to the charger is not released after the notification of the completion of charging, the secondary battery is consumed due to the power consumption consumed for driving the battery-powered electronic device. , Battery level decreases. Then, when the remaining battery level decreases and the remaining battery level becomes equal to or less than a predetermined capacity (this capacity may be changed as appropriate by experiment, ease of use, etc.), the process may return to step S2.

  Thus, according to the third embodiment of the present invention, the usage amount according to the day of the week connected to the charging unit based on the daily usage amount of the secondary battery obtained based on the battery remaining amount information. Is detected, and the amount of use is set as a target charging capacity, and charging is performed up to the target charging capacity. That is, the battery is charged up to a usage amount estimated to be used by the user without registering a schedule indicating the user's action schedule.

  For this reason, according to the third embodiment of the present invention, even if the user's schedule is not registered, the usage amount estimated to be used by the user is charged, so that the user's convenience is not deteriorated. And the deterioration of the secondary battery can be suppressed.

Further, according to the third embodiment of the present invention, charging is performed up to the target charging capacity obtained by adding a margin to the usage amount according to the day of the week. Then, referring to the final remaining battery level for each day, if this final remaining battery level is less than a predetermined capacity lower limit threshold value or greater than a predetermined capacity upper limit threshold value, a margin to be used Increase or decrease the size. For this reason, it is possible to increase the margin to avoid the battery capacity from becoming less than the usage amount, or to reduce the margin to ensure the necessary battery capacity and prevent excessive charging. .
(Fourth embodiment)
FIG. 2 is a diagram showing an example of a battery-type electronic device according to the third and fourth embodiments of the present invention.

  In the fourth embodiment of the present invention, other operations are added to the operations of the control unit 3 and the charging unit 2 of the battery-powered electronic device 1 of the third embodiment. The difference from the third embodiment is mainly described.

  The battery-type electronic device 1 according to the present embodiment includes a secondary battery, a charging unit 2, a battery remaining amount measuring unit 4, a control unit 3, a storage unit 5, and a position information acquisition unit 6. The

  Based on the control of the control unit 3, the storage unit 5 stores the connection start time and the connection time for each day for a predetermined time or more as a history. The control unit 3 stores the connection start time and the connection time for each day for a predetermined time or more in the storage unit 5 as a history. Then, the earliest time among the connection release times corresponding to the date when the charger is connected is checked from the connection start time and the connection time history stored in the storage unit 5. Then, from the earliest disconnection time and the time when the charger is connected, the time to be connected to the charger is obtained, and the charging current value for completing charging at the obtained time is calculated (target charging) (Capacity / determined time) and output. A margin may be provided for the connection release time, and the connection release time may be set earlier by the margin. The charging unit 2 charges the secondary battery with a charging current corresponding to the charging current value output by the control unit 3.

  Next, the operation of the battery-powered electronic device according to the present embodiment will be described with reference to FIGS.

  FIG. 8 is a flowchart showing an example of the operation of the battery-powered electronic device according to the fourth embodiment of the present invention.

  FIG. 9 is a diagram showing an example of a history of connection start time and connection time when the battery-operated electronic device according to the fourth embodiment of the present invention is connected to a charger for a predetermined time or more every day. is there. A history of connection start times and connection times for the past four weeks from the previous day is shown, with the horizontal direction being the day of the week and the vertical direction being the past week. Moreover, the earliest time (the earliest connection release time) of the connection release times of the charger for each day of the week is also shown. The number of weeks is not limited to four weeks, and may be appropriately changed depending on the situation of the battery-powered electronic device 1 such as accuracy and memory capacity of the storage unit 5. This figure shows the history of the past four weeks from Sunday, which is the previous day, where the current day is Monday. For example, the connection start time and connection time on Monday four weeks ago are 20:00 and 10 hours. The connection start time and connection time on Monday three weeks ago are 22:30 and 7 hours. This figure shows that the earliest time (earlyest connection release time) of the connection release times of the charger corresponding to Monday is 5:30.

  Here, an example of the operation of the battery-powered electronic device according to the present embodiment will be described with reference to the flowchart of FIG.

  In addition to the operation shown in the third embodiment, the control unit 3 always performs the following operation. That is, the connection and disconnection of the charger is monitored, and as shown in FIG. 9, the connection start time and the connection time when connected to the charger for each predetermined time or more are stored in the storage unit 5 as history. ing. Here, the connection start time and the connection time corresponding to this connection are stored in the storage unit 5 only when the connection of the predetermined time or more crosses the predetermined time (time 24:00 in FIG. 9). This time may be appropriately changed according to the user's convenience. The predetermined time is, for example, 6 hours. This time may be changed as appropriate by experiment, ease of use, etc. without being particular about 6 hours.

  Step A1 and step A2 in FIG. 8 are the same as step S1 and step S2 in FIG.

  In step A3 of FIG. 8, the following operation is performed in addition to the operation shown in step S3 of FIG. That is, the control unit 3 checks the earliest time of the connection release times corresponding to the date when the charger is connected from the connection start time and connection time history stored in the storage unit 5. As shown in FIG. 9, for example, when today (the day when the charger is connected) is Monday, it is 5:30. And the time which should be connected to a charger is calculated | required from the earliest connection release time and the time (for example, 21:30) when the charger was connected. Since the time to be connected to the charger is 21:30 to 5:30 on the next day, it is 8 hours. Then, a value obtained by dividing the target charging capacity by the obtained time (8 hours) is determined as a charging current value, and the process proceeds to Step A5.

  In step A4 of FIG. 8, the following operation is performed in addition to the operation shown in step S4 of FIG. That is, for example, the control unit 3 determines the standard maximum value of 500 mA as the charging current value, and proceeds to step A5.

  In step A5 in FIG. 8, the following operation is performed instead of step S5 in FIG. That is, the control unit 3 outputs a charging instruction to the charging unit 2 and outputs the charging current value determined in step A3 or step A4 to the charging unit 2. The charging unit 2 connected to the charger starts charging the secondary battery by causing the charging current value output by the charger to flow through the secondary battery.

  Steps A6 to A8 in FIG. 8 are the same as steps S6 to S8 in FIG.

  As described above, according to the fourth embodiment of the present invention, in addition to the effects obtained by the third embodiment, the following effects are obtained. That is, according to the fourth embodiment of the present invention, the connection start time and the connection time when connected to the charger for each predetermined time or more are stored as history. Then, from the stored connection start time and connection time history, the earliest time of the connection release time corresponding to the date when the charger is connected and the time when the charger is connected to the charger. Find the time to stay connected. Then, the secondary battery is charged with a charging current corresponding to a charging current value that completes charging in the obtained time. Thus, while the secondary battery is normally charged at a predetermined maximum current value, according to the fourth embodiment of the present invention, the charging current that can be charged in the time to be connected to the charger To charge the secondary battery.

  For this reason, according to the fourth embodiment of the present invention, the secondary battery at the time of charging can be charged with a charging current that is smaller than a predetermined maximum current value and can be charged in a time to be connected to the charger. Heat generation can be reduced and deterioration of the secondary battery can be suppressed.

Part or all of the above-described embodiments can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1)
A battery-powered electronic device driven by a secondary battery,
A charging unit that charges the secondary battery by supplying the input charging power while the charging instruction signal is input; and
A battery remaining amount measuring unit that outputs battery remaining amount information that is a result of measuring the remaining amount of the secondary battery at a current time;
Target charging corresponding to the usage amount of the secondary battery in a predetermined second period, obtained based on the input battery remaining amount information at at least one time point before an integral multiple of the predetermined first period A battery-powered electronic device comprising: a control unit that supplies the charging instruction signal to the charging unit for a period of time required for the remaining amount of the secondary battery to reach the capacity.
(Appendix 2)
The charging unit charges the secondary battery based on a connected charger,
The battery remaining amount measuring unit outputs battery remaining amount information indicating a remaining amount of battery that is a capacity charged in the secondary battery at a current time based on a monitoring result of the secondary battery,
The control unit obtains a usage amount of the secondary battery for each day that is the second period based on the battery remaining amount information output by the battery remaining amount measuring unit, and when the charger is connected, Based on the determined usage amount of the secondary battery, a usage amount corresponding to the day of the week connected to the charging unit is detected, the usage amount is determined as a target charging capacity, and the charging instruction is output, When the remaining battery level of the secondary battery reaches the target charging capacity, the output of the charging instruction is stopped.
The battery-operated electronic device as set forth in appendix 1, characterized by comprising:
(Appendix 3)
A storage unit for storing daily usage of the secondary battery as a history;
The control unit obtains the maximum usage amount for each day of the week based on the usage amount of the secondary battery stored in the storage unit, and determines the target charging capacity for each day of the week based on the obtained maximum usage amount. ,
The battery-operated electronic device as set forth in appendix 2, wherein
(Appendix 4)
A position information acquisition unit that acquires position information of the battery-powered electronic device;
When the control unit determines that the battery-powered electronic device is in a predetermined area based on the position information acquired by the position information acquisition unit,
Determining the target charging capacity for each day of the week based on the maximum usage;
The battery-operated electronic device according to Supplementary Note 3, wherein
(Appendix 5)
The control unit stores a connection start time and a connection time when connected to the charger for a predetermined time or more as a history in the storage unit, and stores the connection start time and the connection time history. The earliest time among the disconnection times corresponding to the date when the charger is connected is checked, and the charger is connected from the determined disconnection time and the time when the charger is connected. Calculate the charge current value that completes charging in this calculated time and output it,
The charging unit charges the secondary battery with a charging current according to the charging current value output by the control unit,
The storage unit stores the connection start time and connection time as a history when connected to the charger for a predetermined time or more for each day.
The battery-operated electronic device according to Supplementary Note 3 or 4, wherein
(Appendix 6)
6. The battery-operated electronic device according to appendix 2, 3, 4 or 5, wherein the target charging capacity is obtained by adding a predetermined capacity as a margin to the usage amount of the secondary battery.
(Appendix 7)
The control unit obtains the last remaining battery level for each day from the remaining battery level measurement unit, and refers to the last remaining battery level for each obtained day so that the remaining battery level is determined on a specific day of the week. When it is less than a predetermined capacity lower limit threshold or more than a predetermined capacity upper limit threshold, the predetermined capacity added as the margin on the specific day is increased or decreased,
The battery-operated electronic device according to appendix 6, wherein
(Appendix 8)
A position information acquisition unit that acquires position information of the battery-powered electronic device;
When the control unit determines that the battery-powered electronic device is not in a predetermined area based on the position information acquired by the position information acquisition unit,
Setting a predetermined full charge capacity for the secondary battery as the target charge capacity;
The battery-operated electronic device as set forth in appendix 2, wherein
(Appendix 9)
A position information acquisition unit that acquires position information of the battery-powered electronic device;
The control unit measures a fluctuation state of the usage amount used by the user for each day of the week, and determines that the battery-powered electronic device is not in a predetermined area based on the position information acquired by the position information acquisition unit. In this case, based on the measured variation of the usage amount, obtain the usage amount to be used in the time after the time of connecting the charger on the day of the week to which the charger is connected, the obtained usage amount, and the Set the difference from the remaining battery level when the charger is connected to the target charging capacity,
The battery-operated electronic device as set forth in appendix 2, wherein
(Appendix 10)
A method for charging a secondary battery provided in a battery-powered electronic device driven by a secondary battery,
Based on the battery remaining amount information that is a result of measuring the remaining amount of the secondary battery at the present time, the secondary in the predetermined second period at at least one time point before an integral multiple of the predetermined first period. Find battery usage,
Charging the secondary battery until the remaining capacity of the secondary battery reaches the target charge capacity corresponding to the determined usage amount;
A method for charging a secondary battery.
(Appendix 11)
In the method for charging the secondary battery provided in the battery-powered electronic device that operates using the secondary battery as a power source,
Based on the remaining battery level indicating the capacity charged in the secondary battery at the present time, the usage amount of the secondary battery for each day that is the second period,
When a battery charger is connected to the battery-powered electronic device, the usage amount corresponding to the day of the week connected to the charging unit is detected based on the usage amount of the secondary battery for each obtained day, and the usage amount is calculated. The target charging capacity is determined, and the secondary battery is charged up to the target charging capacity.
The method for charging a secondary battery as described in appendix 10, wherein:
(Appendix 12)
Based on the usage amount of the secondary battery, the maximum usage amount is calculated for each day of the week,
The charging method of the secondary battery according to claim 11, wherein the target charging capacity for each day of the week is determined based on the obtained maximum usage amount.
(Appendix 13)
Obtaining location information of the battery-powered electronic device;
When it is determined that the battery-powered electronic device is in a predetermined area based on the acquired position information,
Determining the target charging capacity for each day of the week based on the maximum usage;
The method for charging a secondary battery as described in appendix 12, wherein:
(Appendix 14)
Store the connection start time and connection time for each day as a history when connected to the charger for a predetermined time or more,
From the stored connection start time and the history of the connection time, the earliest time of the connection release time corresponding to the date on which the charger is connected,
From the determined disconnection time and the time when the charger is connected, the time to be connected to the charger is obtained,
Calculate the charge current value to complete charging in this calculated time,
Charging the secondary battery with a charging current according to the calculated charging current value;
14. The method for charging a secondary battery as described in appendix 11, 12 or 13, wherein:
(Appendix 15)
15. The secondary battery charging method according to claim 11, 12, 13, or 14, wherein the target charging capacity is obtained by adding a predetermined capacity as a margin to a usage amount of the secondary battery.
(Appendix 16)
Obtain the final battery level from the battery level measurement unit for each day,
By referring to the last remaining battery level for each acquired day, the remaining battery level is less than a predetermined capacity lower limit threshold or higher than a predetermined capacity upper limit threshold on a specific day of the week. In this case, the predetermined capacity added as the margin on the specific day is increased or decreased.
The method of charging a secondary battery as described in appendix 15, wherein
(Appendix 17)
Obtaining location information of the battery-powered electronic device;
When it is determined that the battery-powered electronic device is not in a predetermined area based on the acquired position information,
Setting a predetermined full charge capacity for the secondary battery as the target charge capacity;
The method for charging a secondary battery as described in appendix 11, wherein:
(Appendix 18)
Measure the daily fluctuations of usage used by the user for each day of the week,
Obtaining location information of the battery-powered electronic device;
When it is determined that the battery-powered electronic device is not in a predetermined area based on the acquired position information, the charger on the day of the week on which the charger is connected is connected based on the measured change in the usage amount. The amount of use to be used in the time after the specified time,
The difference between the obtained usage amount and the remaining battery level when the charger is connected is set as the target charging capacity,
The method for charging a secondary battery as described in appendix 11, wherein:

DESCRIPTION OF SYMBOLS 1 Battery type electronic device 2 Charging part 3 Control part 4 Battery remaining charge measurement part 5 Storage part 6 Location information acquisition part

Claims (10)

A battery-powered electronic device driven by a secondary battery,
A charging unit that charges the secondary battery by supplying the input charging power while the charging instruction signal is input; and
A battery remaining amount measuring unit that outputs battery remaining amount information that is a result of measuring the remaining amount of the secondary battery at a current time;
Target charging corresponding to the usage amount of the secondary battery in a predetermined second period, obtained based on the input battery remaining amount information at at least one time point before an integral multiple of the predetermined first period A battery-powered electronic device comprising: a control unit that supplies the charging instruction signal to the charging unit for a period of time required for the remaining amount of the secondary battery to reach the capacity. The charging unit charges the secondary battery based on a connected charger,
The battery remaining amount measuring unit outputs battery remaining amount information indicating a remaining amount of battery that is a capacity charged in the secondary battery at a current time based on a monitoring result of the secondary battery,
The control unit obtains a usage amount of the secondary battery for each day that is the second period based on the battery remaining amount information output by the battery remaining amount measuring unit, and when the charger is connected, Based on the determined usage amount of the secondary battery, a usage amount corresponding to the day of the week connected to the charging unit is detected, the usage amount is determined as a target charging capacity, and the charging instruction is output, When the remaining battery level of the secondary battery reaches the target charging capacity, the output of the charging instruction is stopped.
The battery-powered electronic device according to claim 1, further comprising: A storage unit for storing daily usage of the secondary battery as a history;
The control unit obtains the maximum usage amount for each day of the week based on the usage amount of the secondary battery stored in the storage unit, and determines the target charging capacity for each day of the week based on the obtained maximum usage amount. ,
The battery-powered electronic device according to claim 2. A position information acquisition unit that acquires position information of the battery-powered electronic device;
When the control unit determines that the battery-powered electronic device is in a predetermined area based on the position information acquired by the position information acquisition unit,
Determining the target charging capacity for each day of the week based on the maximum usage;
The battery-powered electronic device according to claim 3. The control unit stores a connection start time and a connection time when connected to the charger for a predetermined time or more as a history in the storage unit, and stores the connection start time and the connection time history. The earliest time among the disconnection times corresponding to the date when the charger is connected is checked, and the charger is connected from the determined disconnection time and the time when the charger is connected. Calculate the charge current value that completes charging in this calculated time and output it,
The charging unit charges the secondary battery with a charging current according to the charging current value output by the control unit,
The storage unit stores the connection start time and connection time as a history when connected to the charger for a predetermined time or more for each day.
The battery-powered electronic device according to claim 3 or 4,   6. The battery-powered electronic device according to claim 2, wherein the target charging capacity is obtained by adding a predetermined capacity as a margin to a usage amount of the secondary battery. The control unit obtains the last remaining battery level for each day from the remaining battery level measurement unit, and refers to the last remaining battery level for each obtained day so that the remaining battery level is determined on a specific day of the week. When it is less than a predetermined capacity lower limit threshold or more than a predetermined capacity upper limit threshold, the predetermined capacity added as the margin on the specific day is increased or decreased,
The battery-powered electronic device according to claim 6. A position information acquisition unit that acquires position information of the battery-powered electronic device;
When the control unit determines that the battery-powered electronic device is not in a predetermined area based on the position information acquired by the position information acquisition unit,
Setting a predetermined full charge capacity for the secondary battery as the target charge capacity;
The battery-powered electronic device according to claim 2. A position information acquisition unit that acquires position information of the battery-powered electronic device;
The control unit measures a fluctuation state of the usage amount used by the user for each day of the week, and determines that the battery-powered electronic device is not in a predetermined area based on the position information acquired by the position information acquisition unit. In this case, based on the measured variation of the usage amount, obtain the usage amount to be used in the time after the time of connecting the charger on the day of the week to which the charger is connected, the obtained usage amount, and the Set the difference from the remaining battery level when the charger is connected to the target charging capacity,
The battery-powered electronic device according to claim 2. A method for charging a secondary battery provided in a battery-powered electronic device driven by a secondary battery,
Based on the battery remaining amount information that is a result of measuring the remaining amount of the secondary battery at the present time, the secondary in the predetermined second period at at least one time point before an integral multiple of the predetermined first period. Find battery usage,
Charging the secondary battery until the remaining capacity of the secondary battery reaches the target charge capacity corresponding to the determined usage amount;
A method for charging a secondary battery.

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