KR20040078517A - A device and a method of charging for mobile phone - Google Patents

Abstract

PURPOSE: A mobile phone built-in type charging device and a charging method are provided to use an external power as an operating power for a circuit unit when the external power is input at the state where a charger battery is not mounted in a mobile phone. CONSTITUTION: A mobile phone built-in type charging device comprises a central control unit(110) for monitoring and controlling a mobile phone and a charge state; a low drop-out(LDO) unit(120) connected to the central control unit, and which reports applying of voltage to the central control unit when a voltage is applied from an external source, and outputs the voltage lowered to a predetermined level; a switch(170) connected to the LDO unit, and which outputs or cuts off the applied voltage in accordance with a control signal; a charging unit(130) for outputting, as a current, the voltage applied from the switch in accordance with a control signal; a battery(150) connected to the charging unit, and charged with the applied current; a charge control unit(160) for detecting the internal voltage of the battery, reporting the detected voltage to the central control unit, and controlling the switch by the control of the central control unit; and a circuit unit(140) for receiving operating power from the LDO unit and the battery, and serving as a mobile phone.

Description

Mobile terminal built-in charging device and method {A DEVICE AND A METHOD OF CHARGING FOR MOBILE PHONE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to charging and discharging of a built-in portable terminal, and more particularly, to a portable terminal built-in charging device and a method which operate by an external input power even when a charge and discharge battery is not installed.

USER EQUIPMENT (UE) is a registered state registered in the mobile communication system, and wirelessly communicates with the other party at any time while moving in the corresponding service area (SERVICE AREA), and the operating power of the mobile terminal as described above is charged (CHARGING). ), And use the discharge / rechargeable battery (RECHARGEABLE) that can be reused repeatedly.

The charging and discharging battery as described above requires a separate charger or charging device for charging, the charger has a desk type that is difficult to communicate during charging and a mobile type that can communicate even during charging, and also by the technology development the mobile type It has evolved from a charger to a built-in charger provided in a portable terminal.

As described above, the charging / discharging battery which supplies the operating power to the portable terminal is damaged when the charging current is supplied at the appropriate level or higher and becomes higher than the predetermined voltage. Therefore, the charging and discharging battery must be controlled so that the charging current is not applied above the predetermined voltage. Even when discharged under a certain voltage, there is a characteristic that can not be used because it is damaged and cannot be recharged.

The charger detects the charging voltage of the charging / discharging battery and classifies the full charge state, the charging state, and the broken state, respectively, and performs the corresponding control, and also checks whether the charge / discharge battery is installed and charge current. It controls the supply of, and the charging current also acts as an operating power source for charging the charging and discharging battery and at the same time operating the mobile terminal.

That is, in the mobile charger, when the charge / discharge battery is not built in the portable terminal, since the charger cuts off the supply of the charging current, the operation power supply of the portable terminal is cut off and the portable terminal cannot communicate. In addition, there has been a need for the development of a device for supplying operating power to a portable terminal even when a charge / discharge battery is not installed.

Hereinafter, a built-in charging device and a method of a portable terminal according to the prior art will be described with reference to the accompanying drawings.

For the purpose of describing the prior art, FIG. 1 is a functional block diagram of a built-in charging device of a mobile terminal according to the prior art, and FIG. 2 is a flowchart of a built-in charging method of a mobile terminal according to the prior art.

Referring to FIG. 1, a built-in charging device of a mobile terminal (UE) according to the prior art, the control unit 10 for monitoring and controlling the entire portable terminal; When the 5V charging power is inputted by the control of the control unit and the output to the control unit 10 by outputting and dropping to 4.2V (DROP) to a constant (LDO: LOW DROPOUT) unit 20 and ; A charging unit 30 receiving a charging voltage of 4.2 V from the audio unit 20, outputting a charging current under the control of the control unit 10, and monitoring the charging state and reporting it to the control unit 10; A circuit unit 40 of a portable terminal operating by a voltage applied from the EL unit 20 and performing a mobile communication function by monitoring and controlling the control unit 10); It is composed of a battery 50 of charge and discharge (RECHARGEABLE) that receives and charges the charging current of the charging unit 30 and supplies the voltage charged by the charging current to the circuit unit 40.

When the portable terminal built-in charging device according to the prior art of the configuration described above is described in detail, the EL unit 20 reports to the control unit 10 when a DC 5V charging voltage is applied from the outside, and at the same time the input DC 5V DROP to 4.2V, and if there is a corresponding control signal from the controller 10, the voltage of 4.2V is supplied to the charging unit 30 and the circuit unit 40.

The charging unit 30 is operated in a trickle mode for supplying a small charging current under control of the controller 10, and measures and reports an internal voltage of the battery 50 for charge / discharge to the controller 10. .

In the above process, the EL unit 20 supplies the power of 4.2V to the circuit unit 40.

The controller 10 determines whether the voltage of the battery 50 detected through the charging unit 30 is 2.48V or more or 2.48V or more is not detected.

The controller 10 sets the charging mode when the determination is greater than or equal to 2.48V, and when the determination is not greater than 2.48V, the controller 10 is charged for a predetermined time, that is, for 1/4 hour of the set charging time. It is determined whether a voltage is detected or not detected, and if it is not detected, it is determined that the battery 50 is broken or not mounted in the portable terminal, and the EL unit 20 controls not to output a voltage of 4.2V.

That is, when the voltage of the battery 50 detected by the controller 10 through the charging unit 30 is detected to be 2.48V or less for a 1/4 hour of the set battery charging time, it is determined that the battery 50 is damaged. When no voltage is detected at all during the time, it is determined that the battery 50 is not connected and connected so that the EL unit 20 does not output an operating voltage of 4.2V. There is a problem that communication can not be performed because neither the 50 nor the EL unit 20 is supplied with the operating power.

Referring to FIG. 2, according to the related art, the built-in charging method of the portable terminal includes: a first step S10 of determining whether to charge the battery 50 by the controller 10 of the portable terminal; When the battery 50 is charged according to the determination, the control unit 10 controls the audio to set an LDO mode for outputting a charging voltage of 4.2V (S20) and ; The control unit 10 processing the above step is a third step (S30) to control the charging unit 30 to flow a weak charging current in the trickle mode (TRICKLE MODE); The control unit 10 is a fourth step (S40) for determining whether the voltage of the battery 50 is more than 2.48V through the charging unit 30; When the voltage of the battery 50 is 2.48V or more in the determining step S40, the controller 10 controls the charging unit 30 to set a charging mode for applying a charging current to the battery 50 ( S50); The control unit 10 that checks the voltage of the battery 50 being charged by the charging unit 30 by the step S50 determines whether the fully charged state is fully charged, and when the charging is not complete, the fifth step A sixth step S60 of returning to S50; When the battery 50 is in the fully charged state as determined in the step S60, the battery 50 is fully charged, and after maintaining the standby state without charging for a predetermined period of time, returning to the fifth step (S70) and ; If the voltage of the battery 50 is not detected to be greater than or equal to 2.48 V as determined in the fourth step (S40), 2.48 V or less is continuously detected for 1/4 or more of the predetermined charging time set by the controller 10. If the 2.48V or more is detected during the above time, the process proceeds to the fifth step (S50). If the 2.8V or more is not detected continuously, the ELdio unit 20 is controlled to cut off the 4.2V charging voltage output. Therefore, the eighth step S80 ends the charging.

Hereinafter, the portable terminal built-in charging method according to the prior art of the configuration as described above in detail.

The control unit 10 determines whether to charge through the report that the 5V charging voltage input from the audio unit 20 (S10), 5V is applied to the input of the audio unit 20 in the determination (S10) If you want to charge, set the ELDO mode (LDO MODE) to output a lower voltage of 4.2V by controlling the EL unit 20 (S20), the control unit 30 to control the trickle mode (TRICKLE MODE) Since a small current is supplied to the battery 50 (S30).

The controller 10 detects or measures the internal voltage of the battery 50 through the charging unit 30 and determines whether the measured internal voltage of the battery 50 is 2.48V or more (S40).

If the internal voltage of the battery 50 is 2.48V or more in the determination (S40), since it is a normal charging / discharging battery 50, the controller 10 sets and operates the charging unit 30 in the charging mode so that the battery 50 To be charged (S50).

While the charging by the step (S50) is in progress, the controller 10 continuously measures the internal voltage of the battery 50 through the charging unit 30 to determine whether or not the fully charged state (S60) In case of not being fully charged, the controller returns to the fifth step (S50), and in the fully charged state, waits without charging for a predetermined time and then returns to the fifth step (S50). The charging is continued (S70).

When the internal voltage of the battery 50 does not become 2.48V in the fourth step S40, it is determined whether the detection is detected to be 2.48V or less even during 1/4 hours of the predetermined predetermined battery charge time, and 2.48V during the time. When the V abnormality is detected, the process proceeds to the fifth step S50 to allow the battery 50 to be charged, and when 2.48 V is not detected during the time, the EL unit may be controlled by the control unit 10. 20) ends charging without outputting 4.2V (S80).

The predetermined battery charging time means a time required for a fully charged or fully charged state in which the rated battery 50 is completely charged by the charging current supplied from the charging unit 30.

In the prior art having the above configuration, when the charging / discharging battery 50 mounted on the mobile terminal UE is defective or damaged and can no longer be used, and when the battery 50 is not mounted, the controller 10 ) Does not detect 2.48V, so that the control unit 220 does not output 4.2V, so that the charging voltage is not supplied to the charging unit 30 and the operating voltage is not supplied to the circuit unit 40. As a result, there is a problem that the mobile terminal cannot be used for communication.

The present invention provides a portable terminal built-in charging circuit and a method for supplying the operating power of the portable terminal by the power supplied for charging, even when the battery for charging and discharging mounted on the portable terminal is broken or not installed. Purpose.

The present invention has been made in order to achieve the above object, the central control unit for monitoring and controlling the state of charge while monitoring and controlling the entire portable terminal; An audio unit connected to the central controller and reporting to the central controller when the charging voltage is applied from the outside and lowering the output to a constant voltage; A switch connected to the audio unit and outputting or blocking a charging voltage applied by a control signal; A charging unit which outputs a charging voltage applied from the switch as a charging current according to a control signal; A battery connected to the charging unit and charged by an applied charging current; A charging control unit detecting an internal voltage of the battery through the charging unit, reporting the internal voltage to the central control unit, and controlling a switch by control of the central control unit; Characterized in that the configuration consisting of a circuit unit that receives the operating power from the EL unit and the battery and functions as a portable terminal.

In addition, the present invention devised to achieve the above object, the preparation process for determining whether to charge the battery by the central control unit of the portable terminal; When charging in the above process, the central control unit controlling the audio unit to output a voltage and setting an audio mode; A charging process of detecting a mounting state of the battery in the EL mode according to the above process and setting a charging mode when the battery is mounted; It is determined whether the battery being charged by the charging mode of the process is in a fully charged state, and if the fully charged state is characterized in that the standby process to return to the charging mode after waiting without charging for a predetermined time.

1 is a functional block diagram of a built-in charging device of a portable terminal according to the prior art,

2 is a flow chart of a built-in charging method of a portable terminal according to the prior art,

3 is a functional block diagram of a built-in portable device of the present invention,

Figure 4 is a flow chart of a built-in portable terminal charging method according to the present invention.

** Explanation of symbols on the main parts of the drawing **

110: central control unit 120: ELdio unit

130: charging unit 140: circuit unit

150: battery 160: charge control unit

170: switch

Hereinafter, a portable terminal built-in charging device and method according to the present invention will be described with reference to the accompanying drawings.

3 is a functional block diagram of a portable terminal built-in charging device of the present invention, Figure 4 is a flow chart of a built-in portable terminal charging method according to the present invention.

Referring to FIG. 3, according to the present invention, the portable terminal built-in charging device monitors and controls the charging state of the entire portable terminal, and the inside of the battery 150 detected by the charging unit 130 to be described later. The voltage is applied and analyzed through the charging control unit 160 to be described later to check whether the battery 150 is installed, and if the battery 150 is not mounted in the check, the EL unit 120 to be described later is controlled by At the same time to output the lowered voltage to control the charge control unit 160 to cut off the switch 170, and also to control the charge control unit 160 to operate in the charging mode, the battery 150 in a predetermined cycle unit When the internal voltage is checked and the battery 150 is in a fully charged state, the switch 170 is controlled to be in an OFF state for a predetermined time to maintain a charge standby state, and the predetermined time is maintained. After the central control unit 110 controls the switch 170 to an on (ON) state for setting the charging mode; An ELDO (LDO DROPOUT) unit (120) connected to the central control unit (110) and reporting to the central control unit (110) when the charging voltage is applied from the outside and lowering the output to a constant voltage; A switch 170 connected to the EL unit 120 and outputting or blocking the charging voltage applied to the EL unit 120 by an ON / OFF operation by a control signal; The charging voltage applied from the switch 170 outputs the charging current according to the control signal. The internal voltage of the battery 150 is measured in a set time period and reported to the charging control unit 160. A charging unit 130 for supplying the charging power applied from the switch 170 to the battery 150 by the charging current under the control of 160; A battery 150 connected to the charging unit 130 and charged by an applied charging current; By detecting the internal voltage of the battery 150 through the charging unit 130 and reporting to the central control unit 110 and controlling the switch 170 under the control of the central control unit 110, the charging unit 130 The internal voltage of the battery 150 sensed by) is applied to the central controller 110, and the switch 170 is controlled on / off by the control signal of the central controller 110. A charging control unit 160 controlling the charging current of the 130 to operate in a charging mode supplied to the battery 150; The circuit unit 140 receives the operating power from the EL unit 120 and the battery 150 and functions as a portable terminal.

The portable terminal built-in charging device according to the present invention having the above configuration will be described in detail.

When power for charging the charging and discharging battery 150 constituting the mobile terminal (UE) is applied from the outside, for example, when the 5V DC power is applied to the ELdio unit 120, the ELdio unit 120 ) Reports to the central control unit 110 and at the same time lowers the input 5V to 4.2V.

Since the central control unit 110 receives the external voltage input report from the audio unit 120, the control unit to operate in the audio mode to output a voltage of 4.2V converted by applying a control signal to the audio unit 120. , Respectively, applied to the circuit unit 140 and the switch 170, and the switch 170 is controlled to an OFF state by the initial control of the charging control unit 160, and the circuit unit 140 is an operating power source. The power input from the EL unit 120 is used.

The central controller 110 controls the charging controller 160 to check whether the battery 150 is mounted, and the charging controller 160 controls the charger 130 to detect the internal voltage of the battery 150. The internal voltage of the battery 150 detected by the charging unit 130 is reported to the charging control unit 160, and the charging control unit 160 reports back to the central control unit 110.

The central controller 110 analyzes the voltage of the applied battery 150 to check whether the battery 150 is mounted, and if the battery 150 is not mounted, that is, a removable battery. If the 150 is not connected, the charge control unit 160 is controlled to keep the switch 170 in the off state, and thus the EL unit 120 continuously supplies a voltage of 4.2 V to the circuit unit 140. .

When the central controller 110 analyzes the voltage of the applied battery 150 and confirms that the battery 150 is installed, the central controller 110 controls the charging controller 160 to turn on the switch 170. At the same time, the charging unit 130 is controlled to set the charging mode such that the power input from the switch 170 is supplied to the charging / discharging battery 150 to be charged.

The charging unit 130 detects an internal voltage of the battery 150 at a predetermined cycle time unit even when operating in the charging mode, and reports the internal voltage of the battery 150 to the charging control unit 160. Report to the controller 110.

The predetermined set cycle time is set to, for example, a time corresponding to about 1/20 of the actual time when the battery 150 is fully charged or fully charged.

As described above, when the internal voltage of the battery 150 measured by the charging unit 130 is 4.2 V or less, the battery is not fully charged. Therefore, the battery 150 continues to be charged and the internal voltage of the battery 150 measured is 4.2 V. When measured and determined to be in a full charge state, the central control unit 110 controls the charging control unit 160 so that the switch 170 is in a charge standby state where the switch 170 is turned off for a predetermined time.

After the charging standby state for the predetermined time set as described above, the charging control unit 160 under the control of the central control unit 110 is repeatedly controlled to operate in the charging mode by turning on (ON) the switch 170. do.

Referring to the accompanying Figure 4, the portable terminal built-in charging method of the present invention, the preparation process (S100) for determining whether to charge the battery 150 by the central control unit 110 of the portable terminal; In the case of charging in the preparation process (S100), the central control unit 110 controls the output of the voltage lowered by the constant voltage unit 120 to supply the operating power to the circuit unit 140 to the power supply (LDO MODE) A setting process (S110); Detecting the mounting state of the battery 150 in the Eldio mode by the process (S110) and setting the charging mode when the battery is mounted, and analyzes the battery internal voltage detected by the central control unit 110 If it is determined that the battery is not mounted in the process (S120), the process (S120) and the feedback to the EL mode mode (S110), if it is determined that the battery 150 is mounted, A charging process consisting of controlling the charging control unit 160 to set a charging mode (S130),

It is determined whether the battery 150 being charged by the charging mode of the charging process is in a full charge state, and if the fully charged state is to wait without charging for a predetermined time set and then return to the charging mode, the central controller 110 Measuring and analyzing the internal voltage of the battery 150 by a predetermined unit of time in a predetermined cycle, and determining whether the battery is in a fully charged state (S140). When it is determined that the battery is fed back to the charging mode (S130) and is determined to be in a fully charged state, the standby process includes a process (S150) of returning to the charging mode (S130) after waiting without charging for a predetermined time.

Hereinafter, the portable terminal built-in charging method of the present invention having the configuration described above will be described in detail.

Since the central control unit 110 of the portable terminal checks whether a voltage of 5 V is applied to the EL unit 120, for example, it is determined whether to start charging (S100), and when charging by the determination, the EL unit The control unit 120 sets an audio mode for applying a low converted voltage of 4.2V to the circuit unit 140 (S110).

Since the circuit unit 140 receives a voltage of 4.2V by the ELD mode, in the normal operation state, the central controller 110 determines whether the battery 150 is mounted (S120).

The determination (S120) is based on the analysis of the central controller 110 measured by the charging unit 130 and the internal voltage of the battery, and when the battery 150 is not mounted. Since the feedback to the EL mode (S110), so that the circuit unit 140 is continuously supplied with an operating voltage or operating power of 4.2V to allow the mobile terminal to operate normally.

In the determination (S120), when the battery is mounted, the switch 170 is controlled to be in an ON state so that a voltage of 4.2 V applied from the EL unit 120 is input to the charging unit 130. The charging unit 130 sets a charging mode for supplying a charging current to charge the battery 150 (S130).

The battery is charged according to the charging mode set as described above, and is determined by a predetermined cycle time unit (S140). If the battery is not fully charged in the determination, the battery is fed back to the charging mode (S130) to continue charging. .

When fully charged in the determination (S140), the central controller 110 controls the switch 170 to be in an OFF state for a predetermined time, so that the charging standby state for the predetermined time, and After a certain time elapses, the feedback mode is fed back to the charging mode S130, so that the charging / discharging battery 150 maintains a full charge state.

According to the present invention having the above-described configuration, the portable terminal built-in charging device and method, when summarized in more detail, when the charging voltage is input from the outside of the mobile terminal, operating in the EL mode mode the circuit unit Since the voltage is lowered to the operating voltage and supplied to the circuit unit, the portable terminal operates normally.

The central control unit of the portable terminal continuously measures the internal voltage of the battery at predetermined intervals to periodically determine whether the battery is mounted or fully charged if the battery is mounted.

If the battery is not installed according to the determination, the ELD mode is continuously set to allow the circuit unit to operate normally. If the battery is mounted, the charging mode is set to allow the battery to be charged and the operating power is supplied to the circuit unit.

In addition, when the battery is fully charged, it is set to a charging standby state that does not charge for a predetermined time, and after the charging standby state elapses to operate in the charging mode again to fully charge, so that the fully charged state is always maintained. .

Therefore, in the present invention as described above, even when the battery is not installed in the portable terminal, the circuit unit operates with power input from the outside to use a normal mobile communication service.

According to the present invention having the above configuration, when the external power source for charging is input in a state where the battery for charging and discharging is not installed, there is a convenient effect in using the external power source for charging as an operation power source of the circuit unit.

In addition, there is a convenient effect in use to operate the circuit unit using an external power source without the battery of the portable terminal.

Claims (9)

A central control unit for monitoring and controlling the state of charge of the mobile terminal as a whole; An audio unit connected to the central controller and reporting to the central controller when the voltage is applied from the outside and lowering the output to a constant voltage; A switch connected to the audio unit and outputting or cutting off a voltage applied by a control signal; A charging unit for outputting a voltage applied from the switch as a current by a corresponding control signal; A battery connected to the charging unit and charged by an applied current; A charging control unit for detecting an internal voltage of the battery through the charging unit, reporting the internal voltage to the central control unit, and controlling a switch under control of the central control unit; Receiving operation power from the EL unit and the battery and a portable terminal built-in charging device, characterized in that consisting of a circuit unit that functions as a portable terminal. The method of claim 1, wherein the central control unit, The battery internal voltage detected by the charging unit is applied and analyzed through the charging control unit to determine whether the battery is installed, and when the battery is not installed in the confirmation, the EL unit controls the output to output a lowered voltage. And at the same time controlling the charging control unit to block the switch. The method of claim 1, wherein the central control unit, By controlling the charging control unit to check the internal voltage of the battery in a predetermined cycle unit while operating in the charging mode, and maintains the charging standby state by controlling the switch to the off state for a predetermined time when the battery is fully charged After the predetermined time elapses, the built-in charging device of the portable terminal, characterized in that for setting the charging mode by controlling the switch to the on state. The method of claim 1, wherein the charging unit, The internal voltage of the battery is measured in a unit of a predetermined time period and reported to the charging control unit, and the built-in portable terminal, characterized in that for supplying the charging power applied from the switch to the battery as a charging current under the control of the charging control unit. Charging device. The method of claim 1, wherein the charge control unit, Applying the battery voltage sensed by the charging unit to the central control unit and controlling the switch on and off according to a control signal of the central control unit and controlling the charging current of the charging unit to operate in a charging mode supplied to the battery Portable terminal built-in charging device, characterized in that. A preparation process for determining whether to charge the battery by the central control unit of the mobile terminal, In the case of charging in the above process, the central control unit to control the audio output the voltage to set the audio mode, and A charging process of detecting a mounting state of the battery in the EL mode by the above process and setting a charging mode when the battery is mounted; It is determined whether the battery being charged by the charging mode of the process is in a full charge state, and if the full charge state, the built-in portable terminal, characterized in that the standby process for returning to the charging mode after waiting without charging for a predetermined time set Charging method. The method of claim 6, wherein the setting of the audio mode comprises: The charging method of the built-in portable terminal of the control unit of the central controller, characterized in that the audio unit lowers the input voltage to a predetermined voltage and outputs the power to the circuit unit of the portable terminal. The method of claim 6, wherein the filling process, Analyzing the battery internal voltage detected by the central controller and determining whether the battery is mounted; If it is determined that the battery is not installed in the process, the feedback to the EL mode, and if it is determined that the battery is mounted, the mobile terminal built-in charging method comprising the step of setting the charging mode by controlling the charging control unit. The method of claim 6, wherein the waiting process, Measuring and analyzing the internal voltage of the battery by a unit of a predetermined period by the central controller and determining whether the battery is in a fully charged state; If it is determined that the state is not in the full charge state in the process, the charging mode, and if it is determined that the full charge state, the mobile terminal characterized in that the process of returning to the charging mode after waiting without charging for a predetermined time set Built-in charging method.