KR101501031B1 - A portable charging apparatus and a charging control method thereof - Google Patents

Abstract

The present invention relates to a portable auxiliary charging device and a charging control method using the same and, more specifically, to a portable auxiliary charging device, which, when charging a battery of a portable terminal and a battery of a Bluetooth device, has an overcharge protecting function during charging, adjusts output power during charging to enable a full-charging of a device, and has a function for acknowledging charged amount of a battery in the device, and a charging control method using the portable auxiliary charging device. The auxiliary charging device (10) comprises an auxiliary battery (100) accommodated in a case; an input terminal (11) supplying an external source voltage (30) to the auxiliary battery (100); an output terminal (12) delivering the voltage from the auxiliary battery (100) to a main battery (200) of a portable phone terminal (20) or a Bluetooth device; and a control unit (110) which controls the power supplied to and outputted from the auxiliary battery (100).

Description

[0001] The present invention relates to a portable auxiliary charging apparatus and a charging control method using the same,

The present invention relates to a portable auxiliary charging device and a charging control method using the same. More particularly, the present invention relates to a portable auxiliary charging device and a charging control method using the same, To a portable auxiliary charging device equipped with a function of checking the charged amount of the battery in the device, and a charging control method using the same.

BACKGROUND ART [0002] With the recent development of communication means, many people use a mobile communication terminal such as a mobile phone or a smart phone, and a battery can be used by replacing the battery at the back of the mobile communication terminal.

Therefore, most of the people have expensive secondary batteries separately, so that when the battery installed in the mobile communication terminal is used, the mobile communication terminal can be used continuously, The battery is connected to a charger, which is an external device in a state of being coupled to a terminal, and a charger and a handsfree, which are installed and used in a vehicle, to charge the batteries.

However, since the auxiliary battery is inconvenient to carry, most people use the battery only as a battery coupled to the mobile communication terminal. In this case, the battery is consumed due to frequent use of the mobile communication terminal The mobile communication terminal can not be used until the battery is charged again.

Patent Registration No.: 10-1171099 (Name of the Invention: Charging Device of Portable Electronic Device and Charging Method Using the Same)

The present invention relates to a portable auxiliary charger having a charging auxiliary battery and a function of connecting the auxiliary battery to the main battery of the mobile phone or the Bluetooth device in a state where the charging of the auxiliary battery is completed to prevent overcharging, And a function of confirming the remaining amount of power of the auxiliary battery of the portable auxiliary charging device by operation.

The present invention relates to a portable terminal which is provided with an auxiliary battery accommodated in a case, an input terminal for supplying power to the auxiliary battery, an output terminal for outputting the power of the auxiliary battery to the main battery of the mobile phone terminal or the Bluetooth device, And a control unit for controlling a power source to be output, the portable auxiliary charger comprising:

Wherein,

A first voltage detector including a sleep mode for detecting a voltage of the auxiliary battery, a charging mode for detecting a voltage when the auxiliary battery is charged through an external power source, and a discharging mode for detecting a voltage at the time of outputting the charged voltage of the auxiliary battery;

A charge prevention circuit for blocking the voltage of the low-charged or overcharged auxiliary battery to prevent the unbalance of the voltage and maintaining the constant voltage, thereby activating the sleep mode by transmitting a signal to the first voltage detector;

It monitors the charging current when charging to the auxiliary battery via an external power source and functions to limit the low charging or overcharging of the auxiliary battery by controlling the minimum or maximum charging current limit so as not to exceed or exceed the minimum or maximum charging current A charge control function unit; And

And a discharge control function unit that functions to limit the overdischarge of the auxiliary battery through the limitation control of the maximum discharge current so as not to exceed the maximum discharge current by measuring the discharge current when the auxiliary battery is discharged, Lt; / RTI >

In order to control the charging voltage or the buffering voltage, a second voltage for detecting the voltage of the main battery is supplied to the main battery of the mobile phone or the Bluetooth device connected to the output terminal of the portable auxiliary charging device, A setting unit configured to calculate a charging voltage or a damping voltage by calculating a voltage detected from a second voltage detector of the main battery; And a voltage converting unit for supplying power to the main battery so that the voltage output from the generating power source of the auxiliary battery reaches the set main battery buffer voltage through the mode.

The portable auxiliary charger includes a protection circuit for supplying or blocking the main battery buffer voltage converted by the voltage converter to the main battery depending on whether the main battery is overcharged or overcharged.

Meanwhile, the main battery provides a portable auxiliary charging device that receives the voltage converted by the voltage conversion unit from the protection circuit unit when the main battery is not overcharged or overloaded.

Meanwhile, the protection circuit unit may block a voltage supplied from the main battery to the auxiliary battery when the voltage of the main battery is less than a preset reference discharge voltage.

A remaining capacity indicator for indicating the remaining capacity of the main battery is provided on the outer surface of the main body in cooperation with the second voltage detector.

The gyro sensor may further include a calculating module for detecting a charged amount of the auxiliary battery in association with the first voltage detecting unit and determining a voltage level of the charged amount detected by the predetermined voltage level while the gyro sensor is installed in the case,

And a voltage level determined by the operation module is displayed on a display unit provided outside the case.

The present invention relates to a portable auxiliary charging device having a charging auxiliary battery and a charging control method using the auxiliary charging device. The auxiliary battery is connected to a main battery of a mobile phone or a Bluetooth device in a state in which the auxiliary battery is fully charged, Function to prevent overcharging / overdischarging caused by the charging of the auxiliary battery, thereby prolonging the life of the battery. Also, since the main battery can be fully charged to charge the power of the auxiliary battery, the effect of the full charging of the main battery And has a visibility of easily confirming the charged amount due to the function of confirming the remaining power amount of the auxiliary battery of the portable auxiliary charging device by operation.

1 is a block diagram of a portable auxiliary device according to the present invention;
FIG. 2 is a flowchart illustrating a method for controlling charging of a main battery of a mobile phone terminal and charging of an auxiliary power source to an auxiliary battery according to an embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Also, the terms used throughout the specification are defined in consideration of the functions of the embodiments of the present invention. Therefore, the definitions of the terms may be changed according to the intention, It should be based on the contents throughout the specification.

1, the present invention includes an auxiliary battery 100 housed in a case, an input terminal 11 for supplying an external power source 30 to the auxiliary battery 100, And an output terminal 12 for outputting to the mobile phone terminal 20 or the main battery 200 of the Bluetooth device and a control unit 110 for controlling the power supplied to the auxiliary battery 100 and the output power. In the charging apparatus 10,

The control unit 110,

A sleep mode 121 for detecting the voltage of the auxiliary battery 100 and activating the operation and a charging mode 122 for detecting a voltage upon charging the auxiliary battery 100 through the external power supply 30 to activate the operation, A first voltage detector (120) including a discharge mode (123) for detecting and activating a voltage upon output of the charged voltage of the battery (100);

A charging function that activates the sleep mode 121 by transmitting a signal to the first voltage detector 120 so as to prevent the unbalance of the voltage by preventing the voltage of the low-charged or overcharged auxiliary battery 100 from being maintained, Prevention circuit unit 130;

When the auxiliary battery 100 is charged through the external power supply 30, the charging current is monitored so that the minimum or maximum charging current is controlled so as not to exceed or exceed the minimum or maximum charging current. A charge control function unit 140 functioning to limit low charge or overcharge; And

A discharge control function unit 150 (150) which functions to limit the over discharge of the auxiliary battery (100) by controlling the maximum discharge current so that the discharge current does not exceed the maximum discharge current when the auxiliary battery (100) The portable auxiliary charger 10 includes:

The external power supply 30 is connected to the input terminal 11 to charge the auxiliary battery 100 accommodated in a case (not shown) constituting the portable auxiliary charging apparatus 10 and the auxiliary battery 100, the following functions are included in the control unit 110 to prevent buffering and low charging / overcharging, and the control unit 110 outputs a control signal.

The controller 110 includes a first voltage detector 120, a charge prevention circuit 130, a charge control function 140, and a discharge control function 150.

The first voltage detector 120 detects the voltage of the auxiliary battery 100 and activates the operation of the auxiliary battery 100. The first voltage detector 120 detects the voltage of the auxiliary battery 100 when the auxiliary battery 100 is charged through the external power source 30, And a discharge mode 123 for detecting a voltage at the time of outputting the charged voltage of the auxiliary battery 100 and activating the operation of the auxiliary battery 100. The charge prevention circuit unit 130 includes a low charge or overcharged The voltage of the auxiliary battery 100 is cut off to function so that the unbalance of the voltage is prevented and kept constant.

The charging control function unit 140 monitors the charging current when the auxiliary battery 100 is charged through the external power supply 30 so that the minimum or maximum charging current limit The discharge control function unit 150 measures a discharge current when discharging the auxiliary battery 100 and outputs a maximum discharge current to the auxiliary battery 100. [ So that the overdischarge of the auxiliary battery 100 is limited through the limitation control of the maximum discharge current.

2, the sleep mode 121 of the first voltage detector 120 is connected to the button unit 15 provided outside the case so as to detect the charged voltage of the auxiliary battery 100, The voltage detected in the first remaining amount display unit 13 formed outside the case is activated for 3 seconds by depressing the button unit 15 or pressing for 3 seconds or more to activate the discharge mode 123 or press for less than 3 seconds (Hereinafter referred to as "key / touch awakening"), and the gyro sensor 16, which will be described later, is connected to the first voltage detecting unit 120 and detected by the first remaining amount display unit 13 by vibration The main battery 200 of the mobile phone terminal 20 or the Bluetooth device described below is activated to be displayed on the portable auxiliary charging device 10 for three seconds Output terminal 12, the voltage of the auxiliary battery 100 is detected (Hereinafter, referred to as "automatic awake") to activate the discharge mode 123 to output power to the main battery 200 and to activate the auxiliary battery 100 to the input terminal 11 (Hereinafter referred to as "charger connection awake") to detect the voltage of the auxiliary battery 100 when the external power supply 30 is connected.

In addition, a converter unit (not shown) for transforming an external power source or DC power input / output from the mobile phone terminal according to the sleep mode 121 may be temporarily charged and discharged, for example, And serves as a buffer for balancing the power input from the external power source through the converter unit (not shown).

In addition, an inverter unit (not shown) for inverting a power input / output according to the sleep mode 121 is included, and a power input through the external power source 30 and a main battery 200 The current stored in the auxiliary battery 100 of the portable auxiliary charging device 10 is converted into AC power by receiving the DC power and outputted.

At this time, the main battery 200 of the mobile phone terminal 20 or the Bluetooth device is activated in the above-described manner by activating the discharge mode 123 by depressing the button portion 15 for a longer time than 3 seconds or more. And is connected to the output terminal 12 of the portable auxiliary charging apparatus 10 to output power of the auxiliary battery 100 to the main battery 200 to charge the main battery 200. [

When the main battery 200 is charged, the discharge mode 123 determines whether the power of the auxiliary battery 200 is 80 mA or less, whether a continuous current is supplied to the main battery 200 for 60 seconds, Or whether or not the button unit 15 is longer than three seconds, and performs a function of charging the main battery 200 or transmitting a signal to the charging mode 122. [

When the main battery 200 of the mobile phone terminal 20 or the Bluetooth device is connected to the output terminal 12 of the portable auxiliary charging device 10 to activate the discharge mode 123, The voltage detected by the second voltage detecting unit 160 of the main battery 200 is calculated through the setting unit 170 to detect the voltage of the main battery 200, The charging voltage of the main battery 200 or the charging voltage of the main battery 200 or the charging voltage of the main battery 200 by the charging voltage set by the setting unit 170, The voltage output from the power generation source of the auxiliary battery 100 reaches the set main battery 200 buffer voltage through the discharge mode 123 configured in the first voltage detection unit 120 of the auxiliary battery 100 A voltage converting unit 180 for supplying power as much as possible, Including the supply power to the main battery 200 and controls such that the buffer.

The charging mode 122 is activated when the external power source 30 is connected to the input terminal 11 so as to charge the auxiliary battery 100. The external power source 30) is supplied to the auxiliary battery 100, the external power supply 30 is supplied to the charge control function unit 140 to monitor the charge current so that the minimum or maximum charge current The lower limit or overcharge of the auxiliary battery 200 is limited through the limit control.

If the charge voltage of the external power supply 30 is not higher than 4.5 V by the signal indicating whether the charge voltage of the external power supply 30 is higher than 4.5 V by the activation of the charge mode 122, If the voltage is higher than 4.5V, the charge voltage of the external power supply 30 is supplied to the auxiliary battery 100 (100) The charge control function unit 140 controls the voltage of the auxiliary battery 100 to be lower than the voltage of the auxiliary battery 100 when the buffer 160 is fully charged by transmitting the buffering signal of the second voltage detector 160 to the charge control function unit 140 A signal is transmitted to the first voltage detector 120 to detect whether the voltage of the auxiliary battery 100 detected by the first voltage detector 120 is greater than or equal to 4.15 V, If the voltage of the battery 100 is 4.15 V or more, The signal is transmitted to the first voltage detecting unit 120 to detect the voltage of the auxiliary battery 100 while the voltage of the auxiliary battery 100 is not higher than 4.15 V by the charge control function unit 140 Charging stops.

If the buffering function unit 140 is not buffered, the signal is transmitted to the first voltage detecting unit 120 to detect the voltage of the auxiliary battery 100 so that the voltage of the auxiliary battery 100 is 2.8 V If the voltage of the auxiliary battery 100 is greater than or equal to 4.15 V, the charge control function unit 140 transfers the signal to the charge control function unit 140. The voltage of the auxiliary battery 100 is less than 4.15 V The charge control function unit 140 transmits a signal to the first voltage detection unit 120 to detect the voltage of the auxiliary battery 100 and outputs a signal indicating whether the voltage of the auxiliary battery 100 is higher than 4.2 V to the charge control function unit 130. [ If the voltage of the auxiliary battery 100 is higher than 4.2 V, the charge control function unit 140 transfers the continuous current to the auxiliary battery 100 at 1.5 A, If the voltage is not higher than 4.2 V, the charging control function unit 140 The charge control function unit 140 detects whether the charge current is less than 50 mA and stops charging if the charge current is less than 50 mA so that the first voltage detection unit 120 , Whereas if the charging current is not less than 50 mA, the continuous voltage is transferred to the auxiliary battery 100 to be charged.

The discharge control function unit 150 controls the discharge control function unit 150 so that the main battery 200 of the mobile phone terminal 20 or the Bluetooth device is connected to the output terminal 12 of the portable auxiliary charging apparatus 10, The auxiliary battery 100 is supplied with power from the auxiliary battery 100 and is charged to the main battery 200 so that the auxiliary battery 100 can be charged by controlling the maximum discharge voltage and the maximum discharge current of the auxiliary battery 100, Thereby preventing deterioration in performance characteristics and shortening the service life of the auxiliary battery 100. [

Therefore, the controller 110 controls the output voltage control and the charge voltage control according to the voltage monitoring of the auxiliary battery 100, the control of the low voltage or the overcharge prevention, the control of the minimum or maximum charge voltage at the time of charging, Voltage limiting control, and limiting current control during charging or discharging.

1, when the main battery 200 is low-charged or overcharged, the main battery 200 converts the main battery 200 buffer voltage converted by the voltage converter 180 to the main battery 200 The portable auxiliary charger 10 is provided with a protection circuit 190 for supplying or blocking the battery.

That is, when the charging mode 122 of the first voltage detector 120 is activated, whether the auxiliary battery 100 is low-charged or overcharged by the voltage detection signal of the auxiliary battery 100 of the first voltage detector 120 The second voltage detecting unit 160 transmits the above-described charge stop or charge stop signal to the protection circuit unit 190.

If the main battery 200 is not charged or overcharged, the main battery 200 receives the voltage converted from the voltage converter 180 from the protection circuit 190, When the voltage of the main battery 200 becomes equal to or lower than a predetermined reference discharge voltage by the setting unit 170, the protection circuit unit 190 charges the main battery 200, The voltage supplied to the auxiliary battery 100 is cut off.

1, the second remaining amount display unit 14 for displaying the remaining amount of the charged voltage charged in the main battery 200 detected by the second voltage detecting unit 160 is connected to the second voltage detecting unit 160, The charging amount of the main battery 200 to be charged through the auxiliary battery 100 is displayed in real time so that the user can easily utilize the device through the main battery 200. [

1, the gyro sensor 16 is connected to the first voltage detecting unit 120 to detect and display the charged amount of the auxiliary battery 100. At this time, The control unit 110 further includes a calculation module (not shown) associated with the first voltage detection unit 120 so as to divide the charge amount of the auxiliary battery 100 into the voltage detected by the first voltage detection unit 120, And a voltage level set through a module (not shown) is displayed on the first remaining amount display portion 13 formed outside the case.

The charge control function unit 140 controls the charge current supplied to the auxiliary battery 400 through the external power supply 30 and the charge control function unit 140 charges the auxiliary battery 400 with the optimum charge current, And controls the value of the electric current so as to charge the battery 100. Also, the charge control function unit 140 supplies the optimum charge current value to the auxiliary battery 100 in a constant current mode.

When the remaining amount of the auxiliary battery 100 of the portable auxiliary charging device 10 is exhausted and becomes a specific power level (for example, less than 5% of the buffering power), the controller 110 controls the minimum power using the auxiliary battery 100 Mode, that is, the eco mode, so that solar power or physical manual charging can be performed among external power sources.

The solar charger is connected to the input terminal 11 of the portable auxiliary charger 10 as a separate external device to charge the auxiliary battery 100. The physical manual charging generates power by a physical operation And is connected to the input terminal 11 of the portable auxiliary charging apparatus 10 as an external device so as to charge the auxiliary battery 100.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be construed to include various embodiments within the scope of the claims.

Portable auxiliary charger unit 10: Input terminal 11: Output terminal 12: First remainder display unit 13: Second remainder display unit 14: Button unit 15: Gyro sensor 16: Secondary battery 100: Control unit 110: A first voltage detecting unit 120, a charge preventing circuit unit 130, a charge control function unit 140, a discharge control function unit 150, a second voltage detecting unit 160, a setting unit 170, a voltage converting unit 180, Mobile phone terminal: 20, main battery: 200, external power: 30

Claims (15)

An input terminal 11 for supplying an external power source 30 to the auxiliary battery 100 and a power source for supplying the power of the auxiliary battery 100 to the mobile phone terminal 20 or the Bluetooth device 100. [ A sleep mode 121 for detecting the voltage of the auxiliary battery 100 to control the power supplied to the auxiliary battery 100 and the output power of the auxiliary battery 100, A charging mode 122 for detecting the voltage when the auxiliary battery 100 is charged through the power source 30 and a discharging mode 123 for detecting the voltage upon outputting the charged voltage of the auxiliary battery 100, The function of turning off the voltage of the detection unit 120 and the overcharged auxiliary battery 100 to prevent the unbalance of the voltage and maintaining the constant voltage and transmitting the signal to the first voltage detection unit 120 to activate the sleep mode 121 The charging prevention circuit unit 130 and the external power supply 30 A charge functioning to limit the overcharging of the auxiliary battery 100 through limiting control of the minimum or maximum charging current so as to monitor the charging current when the auxiliary battery 100 is being charged so as not to exceed or exceed the minimum or maximum charging current The control function unit 140 and the auxiliary battery 100 are controlled such that the discharge current of the auxiliary battery 100 is measured to limit the over discharge of the auxiliary battery 100 through the limitation control of the maximum discharge current that does not exceed the maximum discharge current And a control unit (110) including a discharge control function unit (150)
The sleep mode 121 of the first voltage detector 120 may be configured to detect the charged voltage of the auxiliary battery 100 by pressing and holding the button unit 15 in conjunction with the button unit 15 provided outside the case A key / touch awakening function for displaying the detected voltage in the first remaining amount display section 13 formed outside the case for 3 seconds by activating the discharge mode 123 through depression for 3 seconds or more or depressing for less than 3 seconds,
A gyro sensor 16 installed inside the case is activated to display a voltage detected by the gyro sensor 16 in the first remaining amount display unit 13 for 3 seconds in cooperation with the first voltage detection unit 120,
When the mobile phone terminal 20 or the main battery 200 of the Bluetooth device is connected to the output terminal 12 of the portable auxiliary charging device 10, the voltage of the auxiliary battery 100 is detected to activate the discharge mode 123 An automatic wake-up function activated to output power to the main battery 200,
And a charger connection awake function activated to detect the voltage of the auxiliary battery (100) when the external power supply (30) is connected to the input terminal (11) for charging the auxiliary battery (100) Device. The method of claim 1, further comprising: supplying power to the auxiliary battery (100) to the main battery (200) of the mobile phone terminal (20) or the Bluetooth device connected to the output terminal (12) of the portable auxiliary charging device A second voltage detector 160 for detecting the voltage of the main battery 200 to control the buffer voltage and a second voltage detector 160 for calculating the voltage detected from the second voltage detector 160 of the main battery 200, (130) configured to detect a charging voltage of the main battery (200) and a first voltage detector (120) of the auxiliary battery (100) The control unit 110 further includes a voltage conversion unit 180 for supplying power to the battery 200 so that a voltage output from the power generation power source reaches the set main battery 200 buffer voltage,
A second remaining amount display unit 14 for displaying the remaining amount of the charged voltage charged in the main battery 200 detected by the second voltage detection unit 160 is connected to the second voltage detection unit 160, Wherein the auxiliary charger is a portable auxiliary charger. delete delete delete delete delete The method of claim 1, further comprising: activating the discharge mode (123) by depressing the button portion (15) for at least 3 seconds in the key / Is connected to the output terminal (12) of the portable auxiliary charging device (10) and outputs power of the auxiliary battery (100) to the main battery (200) to charge the main battery (200) . 9. The method of claim 1 or claim 8, wherein, in charging the main battery (200), the discharge mode (123) is a mode in which the power of the auxiliary battery (200) is supplied to the main battery Whether or not the current is equal to or greater than 1.7 A or whether or not the button unit 15 is longer than three seconds and to charge the main battery 200 or to transmit the signal to the charging mode 122 Wherein the auxiliary charger is a portable auxiliary charger. delete delete delete delete delete An input terminal 11 for supplying an external power source 30 to the auxiliary battery 100 and a power source for supplying the power of the auxiliary battery 100 to the mobile phone terminal 20 or the Bluetooth device 100. [ A sleep mode 121 for detecting the voltage of the auxiliary battery 100 to control the power supplied to the auxiliary battery 100 and the output power of the auxiliary battery 100, A charging mode 122 for detecting the voltage when the auxiliary battery 100 is charged through the power source 30 and a discharging mode 123 for detecting the voltage upon outputting the charged voltage of the auxiliary battery 100, The function of turning off the voltage of the detection unit 120 and the overcharged auxiliary battery 100 to prevent the unbalance of the voltage and maintaining the constant voltage and transmitting the signal to the first voltage detection unit 120 to activate the sleep mode 121 The charging prevention circuit unit 130 and the external power supply 30 A charge functioning to limit the overcharging of the auxiliary battery 100 through limiting control of the minimum or maximum charging current so as to monitor the charging current when the auxiliary battery 100 is being charged so as not to exceed or exceed the minimum or maximum charging current The control function unit 140 and the auxiliary battery 100 are controlled such that the discharge current of the auxiliary battery 100 is measured to limit the over discharge of the auxiliary battery 100 through the limitation control of the maximum discharge current that does not exceed the maximum discharge current And a control unit (110) including a discharge control function unit (150) for supplying power to the portable auxiliary charging apparatus (10) by connecting an external power source to the portable auxiliary charging apparatus (10)
Detecting the voltage of the auxiliary battery 100 through the charging mode 122 of the first voltage detector 120 by connecting an external power source to the input terminal 11 of the portable auxiliary charging device 10,
The charging control function unit 140 of the portable auxiliary charging apparatus 10 may charge the external power supply 30 if the voltage of the external power supply 30 is not higher than 4.5 V by the signal indicating whether or not the charging voltage of the external power supply 30 is higher than 4.5 V Detecting a voltage of the auxiliary battery (100) through the sleep mode (121) by transmitting a signal to the prevention circuit unit (130) and interrupting charging to transmit the signal to the first voltage detection unit (120)
If the voltage is higher than or equal to 4.5V, the charging voltage of the external power supply 30 is transferred to the auxiliary battery 100 to charge the charging voltage of the second voltage detector 160 of the portable auxiliary charging device 10, The signal is transmitted to the first voltage detecting unit 120 to detect the voltage of the auxiliary battery 100 if the buffering function unit 140 is not buffered, To the charge control function unit 140. When the voltage of the auxiliary battery 100 is 4.15 V or more, the charge control function unit 140 performs trickle charge at 200 mA,
If the voltage is not higher than 4.15 V, the charge control function unit 140 transmits a signal to the first voltage detecting unit 120 to detect the voltage of the auxiliary battery 100, so that the voltage of the auxiliary battery 100 is higher than 4.2 V If the voltage of the auxiliary battery 100 is higher than 4.2 V, the charge control function unit 140 transmits a continuous current to the auxiliary battery 100 at 1.5 A ,
If the voltage of the auxiliary battery 100 is not equal to or higher than 4.2 V, the charge control function unit 140 charges the auxiliary battery 100 with a constant voltage, while the charge control function unit 140 determines whether the charge current is less than or equal to 50 mA If the charge current is 50 mA or less, charging is stopped and the buffer mark signal is transmitted to the first voltage detector 120,
And if the charge current is not less than 50 mA, transferring the continuous voltage to the auxiliary battery (100) to charge the auxiliary battery (100).

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