JP2010238585A - Mobile communication equipment, mobile communication equipment control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide mobile communication equipment that has functions operating frequently in practical usage and precisely obtains a decrease in capacity thereof, a mobile communication equipment control method, and a program. <P>SOLUTION: The mobile communication equipment has a function to indicate battery capacity of a battery pack and includes: a timer means for setting timing for halting a given function of a mobile communication equipment body; an integrated control means for forcing the given function to halt at the set timing; and a power source control means for measuring the battery capacity of the battery pack during a halt of the given function. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication device, a control method for a mobile communication device, and a program.

With the widespread use of mobile phones, battery performance has improved. Along with this, the power consumption due to the multi-functionality of mobile phones, for example, one-segment broadcast reception, recording, recording of music content, recording of camera shooting, etc. has been increasing. For this reason, the need to accurately display the remaining amount (capacity) of the battery has attracted attention.
In order to measure the capacity of the battery, it is necessary to read the voltage, current, and temperature, and to correct the decrease in capacity according to the characteristics of the unit cell based on the data.
Technologies related to this type of battery capacity display and measurement have been disclosed (see, for example, Patent Documents 1 and 2).

  The invention described in Patent Document 1 is an invention related to a battery capacity deterioration calculating device for a secondary battery. Specifically, a current sensor, a voltage sensor, a discharge current integration unit, a charge state calculation unit, a battery capacity calculation unit, and a deterioration calculation unit are provided. The current sensor detects a discharge current of the secondary battery. The voltage sensor detects an open voltage of the secondary battery. The discharge current integrating unit calculates a discharge current integrated value based on the discharge current detected by the current sensor. Based on the open circuit voltage at the start of discharge current integration, the open circuit voltage at the end of discharge current integration, and the correlation between the open voltage and the charge state, the charge state calculation unit calculates the charge state from the start of discharge current integration to the end of discharge current integration. Calculate the change. The battery capacity calculation unit calculates the battery capacity at the time of deterioration based on the change in the charging state and the integrated discharge current value. The deterioration calculation unit calculates the battery capacity deterioration of the secondary battery based on the battery capacity at the time of deterioration and the initial battery capacity of the secondary battery stored in advance.

  According to the invention described in Patent Document 1, even if the secondary battery is deteriorated, the state of charge can be obtained using the correlation as long as the correlation at the initial stage of the battery is known. As a result, there is no need to previously obtain a correlation table between internal resistance degradation and capacity degradation by testing or the like, and it is possible to reduce the man-hours and time for obtaining this correlation table, and thus reduce the manufacturing cost.

  The invention described in Patent Document 2 is an invention related to a remaining capacity meter. Specifically, it is a remaining capacity meter for detecting the degree of deterioration of a battery for driving a motor of an electric vehicle, and includes an open voltage detecting means, a remaining capacity detecting means when stopped, a discharging electric capacity detecting means, a full charge capacity calculating means, And a deterioration degree calculation means. The open voltage detection means detects the open voltage of the battery from the battery voltage when the vehicle is stopped. The stop remaining capacity detecting means detects the remaining capacity of the battery from the detected open circuit voltage. The discharge electric capacity detection means detects the discharge electric capacity of the battery based on the integrated value of the discharge current of the battery. The full charge capacity calculation means calculates the full charge capacity of the battery from the remaining capacity at the time of stop and the discharge electric capacity. The deterioration degree calculating means calculates the deterioration degree from the full charge capacity and the nominal full charge capacity.

  According to the invention described in Patent Document 2, by detecting the battery open voltage when the vehicle is stopped, the actual full charge capacity at that time can be detected. Using this, the degree of deterioration can be detected, and the battery remaining capacity can be accurately detected in consideration of the degree of deterioration.

Japanese Patent Laid-Open No. 2002-243813 JP-A-6-242193

By the way, Patent Document 1 discloses a method of calculating a reduced capacity Q from ΔSOC (charging rate) before and after discharging and a capacity integrated by discharging.
Here, in order to accurately calculate the reduced capacity Q, it is necessary to stabilize the open circuit voltage before and after the discharge.
However, in a mobile phone or the like, the main body function frequently operates by e-mail or the like, and it is difficult to obtain a desired stable open-circuit voltage.

  Further, the invention described in Patent Document 2 has the inconvenience that the remaining battery capacity can be detected only when the vehicle is stopped.

  That is, the first problem is that an open-circuit voltage cannot be stabilized in a device that functions frequently, such as a mobile phone, so that it is impossible to measure a highly accurate SOC in actual use.

  The second problem is that the function cannot be freely restricted for a long time because it is frequently used in life.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile communication device, a control method for a mobile communication device, and a program capable of accurately grasping a reduced capacity in a device that functions frequently in actual use.

  In the mobile communication device having the battery capacity display function of the battery pack, the device of the present invention forcibly enforces the predetermined function at the timing and the timer means for setting the timing for stopping the predetermined function of the mobile communication device main body. And an overall control means for automatically stopping and a power supply control means for measuring the battery capacity of the battery pack while the predetermined function is stopped.

  The method of the present invention is a method for controlling a mobile communication device having a battery capacity display function of a battery pack, wherein a timing for stopping a predetermined function of the mobile communication device main body is set, and the predetermined function is set at the timing. Is forcibly stopped, and the battery capacity of the battery pack is measured while the predetermined function is stopped.

  The program of the present invention is a program for controlling a mobile communication device having a battery capacity display function of a battery pack, wherein the computer sets a timing for stopping a predetermined function of the mobile communication device main body, It is characterized by functioning as means for forcibly stopping the predetermined function at timing and means for measuring the battery capacity of the battery pack while the predetermined function is stopped.

  ADVANTAGE OF THE INVENTION According to this invention, provision of the mobile communication apparatus which can perform a capacity | capacitance confirmation with high precision even in the state of a battery with reduced capacity, a control method for a mobile communication apparatus, and a program can be realized.

1 is a configuration diagram of an embodiment of a mobile communication device according to the present invention. It is a block diagram of the capacity management 3 used for the mobile communication apparatus shown in FIG. It is a block diagram of the charging / discharging management 4 used for the mobile communication apparatus shown in FIG. It is an example of the flowchart for demonstrating operation | movement of the mobile communication apparatus shown in FIG.

<Features>
In the mobile communication device as a portable electronic device having a battery capacity display function of a battery pack, the present invention performs a decrease capacity check (performs discharging while controlling the main body function operation) at an arbitrary timing of the user. Thus, it is possible to check the capacity with high accuracy even in the state of the battery whose capacity has decreased.
By providing a reduced capacity confirmation function, the user can arbitrarily measure the reduced capacity.
The reduced capacity confirmation function is a function for measuring the open circuit voltage before and after the discharge in a state where a predetermined function of the device is limited.
By limiting the predetermined function during the operation of the reduced capacity confirmation function, the effect of IR drop due to the main unit function operating current can be eliminated and the open circuit voltage can be stabilized.
Thereby, the open circuit voltage can be stabilized, and the reduced capacity Q can be obtained with high accuracy.

<Configuration>
Next, an embodiment of the present invention will be described.
FIG. 1 is a configuration diagram of an embodiment of a mobile communication device according to the present invention.
FIG. 2 is a configuration diagram of the capacity management 3 used in the mobile communication device shown in FIG.
FIG. 3 is a configuration diagram of the charge / discharge management 4 used in the mobile communication device shown in FIG.

In FIG. 1, the mobile communication device has a main body and a battery pack 2. The main body has a power supply control circuit 1 as power supply control means, a CPU (Central Processing Unit) 5 as overall control means, and a functional load. “Functional load” refers to a load such as a circuit having various functions such as a front-end circuit and a liquid crystal display circuit (not shown).
In addition, the mobile communication device has a reduced capacity confirmation function.

The power supply control circuit 1 is a circuit that controls charging / discharging by the CPU 5. The capacity management 3 in the power supply control circuit 1 detects the capacity of the battery pack 2 and stores the capacity data in a RAM (Random Access Memory) (not shown). The charge / discharge management 4 in the power supply control circuit 1 controls the discharge at the time of confirming the reduced capacity and the charge / discharge accompanying the use of the main body function.
The CPU 5 controls the main body function operation when confirming the reduced capacity. A timer 6 as a timer means in the CPU 5 controls ON / OFF at a timing when the reduced capacity confirmation function is desired by the user.
A double arrow between the discharge switch 14, the charge / discharge control unit 15, and the CPU 5 indicates data exchange.

  In FIG. 2, the capacity management 3 includes a voltage sensor 7, a current sensor 8, a temperature sensor 9, an open-circuit voltage detection unit 10, a current integration unit 11, a capacity calculation unit 12, and a battery data storage unit 13. The capacity management 3 is packaged in an IC package, and P1 to P4 are connection terminals.

The voltage sensor 7, the current sensor 8, and the temperature sensor 9 measure the voltage, current, and temperature of the battery pack 2, respectively.
The voltage sensor 7 is a device that detects a voltage, and includes, for example, a known sensor using an A / D converter.
The current sensor 8 is a device that detects a current. For example, the voltage at both ends of a resistor where a current is to be measured is measured with a voltage sensor, and is calculated based on Ohm's law from the obtained voltage value and resistance value. Alternatively, a high side current sensor may be used.
As the temperature sensor 9, for example, a thermistor is used.
The open voltage detection unit 10 detects the open voltage of the battery pack 2 based on the data read by the voltage sensor 7.
The current integrating unit 11 integrates the current that flows along with charging / discharging based on the data read by the current sensor 8.
The capacity calculation unit 12 calculates the capacity of the battery pack 2 based on data from the temperature sensor 9, the open-circuit voltage detection unit 10, and the current integration unit 11.
The battery data storage unit 13 stores the capacity data of the battery pack 2 calculated by the capacity calculation unit 12 and the data used for the calculation.

In FIG. 3, the charge / discharge management 4 includes a discharge switch 14 and a charge / discharge control unit 15. The charge / discharge management 4 is made into an IC package, and P5 to P6 are connection terminals. Note that a terminal for connection with the CPU is omitted.
The discharge switch 14 is turned on at the time of starting the capacity decrease confirmation, and discharges the battery pack 2 by a predetermined capacity. For example, an FET (Field Electric Transistor) is used. A fixed resistor having a predetermined value (for example, 30 kΩ) and an FET are used for discharging. Specifically, this is performed by connecting the source of the FET whose drain is connected to the power supply line to the other end of the resistor whose one end is grounded, and controlling the control voltage to the gate.
The charge / discharge control unit 15 manages charge / discharge related to the operation of the main body under a predetermined condition, and controls the discharge switch 14 during the operation of the reduced capacity confirmation function.

  Although the configuration has been described in detail above, the battery pack 2 of FIG. 1 is well known to those skilled in the art and is not directly related to the present invention, and thus the detailed configuration is omitted. In addition, the discharge switch 14 can be composed of a bipolar transistor or the like.

<Description of operation>
Next, the operation of the reduced capacity confirmation function system of FIG. 1 will be described using the flowchart shown in FIG.
FIG. 4 is an example of a flowchart for explaining the operation of the mobile communication device shown in FIG.
When the user uses the reduced capacity check function, the time for operating the function is arbitrarily determined by a timer.
The CPU 5 determines whether or not the time set by the timer has come (step S1).
The CPU 5 stands by until the set time is reached (step S1 / No), and when the timer reaches the set time (step S1 / Yes), the reduced capacity confirmation function is turned on (step S2).

  First, the CPU 5 partially stops a predetermined main body function. The function to be stopped is determined from the current consumption with each function and the importance of the function. For example, as an example, an emergency call is activated, only the call reception function is left, and the other functions are stopped (step S3).

After the main body function is stopped, the CPU 5 measures the open voltage (V1) of the battery pack 2 (step S4).
The CPU 5 determines whether or not the open circuit voltage (Va) is equal to or higher than a specified voltage (step S5).
When the CPU 5 determines that the open circuit voltage (Va) is less than the specified value (step S5 / No), the reduced capacity confirmation function is stopped. This is to prevent the capacity of the battery pack 2 from being reduced to a level where the main device cannot be driven by the operation of this function.

When the CPU 5 determines that the open circuit voltage (Va) is equal to or higher than the specified value (step S5 / Yes), the CPU 5 measures the open circuit voltage (Vb) again after a predetermined time (step S6).
The CPU 5 determines whether or not Vb−Va (ΔV1) is smaller than a predetermined value (step S7).
When the CPU 5 determines that Va−Vb (ΔV1) is equal to or less than the specified value (step S7 / Yes), the CPU 5 determines that the voltage is stable, and based on the battery data in the capacity calculation unit 12, the charging rate is determined. SOC1 is calculated (step S8).
The measurement of the open circuit voltage (Vb) is repeated until ΔV1 becomes equal to or less than the specified value (steps S4 to S7). This operation is performed by the open-circuit voltage detection unit 10.

When ΔV1 becomes equal to or less than the specified value (step S7 / Yes), the discharge switch 14 is turned on. When the discharge switch 14 is turned on, the battery pack 2 starts discharging (step S9).
The CPU 5 determines whether or not the integrated amount (discharge integrated amount) is larger than a predetermined value (step S10).
When the CPU 5 determines that the accumulated discharge amount exceeds a predetermined value (step S10 / Yes), the discharge switch 14 is turned off and the discharge is stopped (step S11).
The discharge switch 14 is controlled by the charge / discharge control unit 15.

The CPU 5 measures the open-circuit voltages (Vc, Vd) after a predetermined time as before the discharge (steps S12, S13), and determines whether Vd−Vc (ΔV2) is equal to or less than a specified value (step S14). .
When the CPU 5 determines that Vd−Vc (ΔV2) has become equal to or less than the specified value (step S14 / Yes), the CPU 5 calculates the charging rate SOC2 based on the battery data in the capacity calculation unit 12.
The CPU 5 determines whether or not there is an interruption operation during the flow (step S15). When it is determined that there is an interrupt operation, the CPU 5 ends (step S / Yes), and when it is determined that there is no interrupt operation (step S15 / No). Based on the SOC information and the accumulated current during discharge, the capacity calculation unit 12 calculates the deteriorated capacity Q. For example, the method described in Patent Document 1 can be used to calculate the deteriorated capacity Q (step S16). Thereby, the capacity | capacitance of a fall battery can be obtained correctly.

  In this way, according to the present invention, the capacity Q at the time of decrease can be calculated in a state where the predetermined main body function is stopped, so that the capacity determination with high accuracy can be performed.

<Program and storage medium>
The mobile communication device according to the present invention described above is realized by a program that causes a computer to execute processing. Examples of the computer include general-purpose computers such as a microprocessor, but the present invention is not limited to this. Therefore, as an example, a case where the present invention is realized by a program will be described below.

In a program for controlling a mobile communication device having a battery capacity display function of a battery pack,
On the computer,
(1) means for setting a timing for stopping a predetermined function of the mobile communication device body;
(2) means for forcibly stopping the predetermined function at timing; and (3) means for measuring the battery capacity of the battery pack while the predetermined function is stopped.
As a program for making it function.

Thus, the apparatus according to the present invention can be realized anywhere as long as there is a computer environment capable of executing the program.
Such a program may be stored in a computer-readable storage medium.
Here, examples of the storage medium include a computer-readable storage medium such as a CD-ROM (Compact Disc Read Only Memory), a flexible disk (FD), and a CD-R (CD Recordable), a flash memory, and a RAM (Random). Examples include semiconductor memories such as Access Memory (ROM), Read Only Memory (ROM), and FeRAM (ferroelectric memory), and HDD (Hard Disc Drive).

  The above-described embodiment shows an example of a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention. is there. For example, in the above-described embodiment, capacity management and discharge switch control are incorporated in the power supply control circuit, but the present invention is not limited to this and may be incorporated in the CPU.

<Description of effects>
As described above, the present invention has the following effects.
The first effect is that the battery capacity can be measured with high accuracy because it has a function of discharging under desired conditions linked to the function restriction of the main device.
The second effect is that since the timer is provided, the reduced capacity confirmation function with function restriction can be performed at an arbitrary time according to the convenience of the user.

  The present invention can be used for portable electronic devices such as mobile phones, PDAs (Personal Digital Assistants), and portable game devices.

1 Power Control Circuit 2 Battery Pack 3 Capacity Management 4 Charge / Discharge Management 5 CPU
6 Timer 7 Voltage sensor 8 Current sensor 9 Temperature sensor 10 Open-circuit voltage detection unit 11 Current integration unit 12 Capacity calculation unit 13 Battery data storage unit 14 Discharge switch 15 Charge / discharge control unit

Claims (6)

In a mobile communication device having a battery capacity display function of a battery pack,
Timer means for setting a timing for stopping a predetermined function of the mobile communication device main body;
Overall control means for forcibly stopping the predetermined function at the timing;
Power control means for measuring the battery capacity of the battery pack during the stop of the predetermined function;
A mobile communication device comprising: The power control means includes
Capacity management for measuring the capacity of the battery pack;
Charge / discharge management for controlling charge / discharge of the battery pack;
The mobile communication device according to claim 1, further comprising: The capacity management is
A voltage sensor for measuring the voltage of the battery pack;
Based on voltage data from the voltage sensor, an open-circuit voltage detector that measures the open-circuit voltage of the battery pack,
A current sensor for measuring the current of the battery pack;
A temperature sensor for measuring the temperature;
Based on the current data from the current sensor, a current integration unit that integrates the amount of current accompanying charging and discharging,
A capacity calculation unit that calculates a battery capacity based on data of each of the open-circuit voltage detection unit, the current integration unit, and the temperature sensor;
A battery data storage unit for storing battery capacity data of the capacity calculation unit and each data used for calculation;
The mobile communication device according to claim 2, further comprising: The charge / discharge management is
A discharge switch that is turned on at the time of starting the capacity decrease check and discharges the battery pack by a predetermined capacity;
A charge / discharge control unit that manages charge / discharge related to the operation of the mobile communication device main body under a predetermined condition;
The mobile communication device according to claim 2, further comprising: In a control method of a mobile communication device having a battery capacity display function of a battery pack,
Set the timing to stop the specified function of the mobile communication device body,
Forcibly stopping the predetermined function at the timing,
A method for controlling a mobile communication device, wherein the battery capacity of the battery pack is measured while the predetermined function is stopped. In a program for controlling a mobile communication device having a battery capacity display function of a battery pack,
On the computer,
Means for setting a timing for stopping a predetermined function of the mobile communication device body;
Means for forcibly stopping the predetermined function at the timing; and means for measuring a battery capacity of the battery pack during the stop of the predetermined function;
Program to function as.

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