KR100810261B1 - System and method for battery charge in mobile phone - Google Patents

Abstract

A battery charging system in a portable terminal and a method thereof are provided to sufficiently secure the capacity of a rechargeable battery by enabling a portable terminal to be recognized at a charging cradle, regardless of the power-on/off states of the portable terminal. A battery charging system consists of a portable terminal(200) and a charging cradle. The portable terminal(200), connected with a battery(240), regularly outputs voltage at more than an appointed value, regardless of power-on/off states. Using the voltage outputted from the portable terminal(200), the charging cradle charges the battery(240) according to a recognition state for the portable terminal(200). The portable terminal(200) comprises a "+" terminal, a ground terminal, and an interface(230). The "+" terminal and the ground terminal are provided to charge the battery(240). The interface(230) comprises a diode and a recognition terminal. The diode is provided to prevent the current inputted from the charging cradle from flowing backward. The recognition terminal is connected through voltage-dividing resistors between the diode and the "+" terminal of the battery(240).

Description

Battery charging system and method for mobile terminal {SYSTEM AND METHOD FOR BATTERY CHARGE IN MOBILE PHONE}

1 is a block diagram of a general TTA charging device

2A is a block diagram of a portable terminal according to an exemplary embodiment of the present invention.

2b is a block diagram of an interface unit according to an embodiment of the present invention;

Figure 3 is a block diagram of a charging cradle for charging the mobile terminal according to an embodiment of the present invention

4 is a perspective view of a charging cradle for charging a mobile terminal according to an embodiment of the present invention;

5 is a flowchart of a method for charging a mobile terminal according to an exemplary embodiment of the present invention.

The present invention relates to a battery charging system and method for a portable terminal that enables the portable terminal to be recognized regardless of the on / off state of the portable terminal in the charging cradle.

In general, a portable terminal is a device that allows a user to carry, store, process and output stored information, and provide a mobile communication function to the user. Such portable terminals include personal digital assistance (PDA), global positioning system (GPS) terminals, and mobile communication terminals. Recently, as the notebook computer becomes smaller, portability is further improved, and at the same time, with the development of wireless communication technology, an environment in which a portable computer can be used to access multimedia functions such as watching movies or access the Internet anywhere is carried out.

Recently, various functions have been added to portable terminals to satisfy various needs of users. In particular, multimedia functions that deliver data and images that are most frequently used, as well as functions such as e-mail, the Internet, and games using a mobile terminal are continuously being added.

On the other hand, in using mobile terminals, securing a stable power supply on the go has become a major criterion for the selection of mobile terminals. Accordingly, the Telecommunications Technology Association (TTA) proposes a charger standard of the same standard or method. Was established.

Standardization of the TTA charger has been standardized in such a way that the terminal can be charged anytime and anywhere by connecting a power supply to a data communication jack mounted on the terminal.

The TTA charger standard unifies the charger for a mobile terminal into a travel charger method using an input / output connector, and defines the common common connector pin number of the input / output connector as 24 pins. In other words, the TTA charger standard uses 24 pins of plug-in I / O terminals commonly adopted by mobile communication terminals to allocate 7 pins for battery charging, 5 pins for handsfree, and 8 pins for data communication, and freely select the remaining four pins. It is prescribed for use. In particular, four spare pins can be used to implement unique functions for each terminal product.

1 is a block diagram of a general TTA charging apparatus.

As shown in FIG. 1, a typical TTA charging device includes a TTA charger 110 connected to an insert terminal 112 for supplying charging power, and a portable terminal 130 to connect the portable TTA charger from the TTA charger 110. The charging cradle 120 is supplied to the battery 131 of the terminal 130.

The TTA charger 110 is composed of a charger body 111, and the plug-in terminal 112 connected to the charger body 111, the plug-in terminal 112 is a charging power source in the charger body 111 A light emitting diode (LED) 113 for informing supply is mounted.

The rechargeable holder 120 includes an insertable terminal 112 of the TTA charger 110, a removable connector 121, and a recognition terminal 122 recognizable by the portable terminal 130, and the connector 121. The line is connected between the recognition terminal 122 in a 1: 1 manner.

Referring to the operation of the general TTA charging device as follows.

The TTA charger 110 inserts the portable terminal 130 into the recognition terminal 122 of the rechargeable cradle 120 in a state where the pluggable terminal 112 is inserted into and connected to the connector 121 of the charging cradle 120. When plugged in, it becomes ready to charge.

Thereafter, when the TTA charger 110 connects the charger body 111 to a power terminal, the TTA charger 110 inserts power to be charged from the charger body 111 into the battery 131 mounted on the mobile terminal 130. Through the charging cradle 120 is supplied.

Accordingly, the TTA charger 110 is supplied with charging power to the portable terminal 130 inserted into the recognition terminal 122 of the charging cradle 120 to charge the battery 131 mounted on the portable terminal 130. do.

At this time, the TTA charger 110 recognizes the mounting state of the portable terminal 130 only when the power of the portable terminal 130 is turned on, and turns on the light emitting diode 113 mounted in the plug-in terminal 112 to charge it. It will indicate status.

Such a general TTA charging apparatus is provided by using the power of the portable terminal 130 as the rechargeable battery 131. When the power of the portable terminal is turned off, the portable terminal does not recognize the portable terminal from the recognition terminal 122. There are many difficulties in securing sufficient capacity.

The present invention for solving the above problems is to provide a battery charging system and method for recognizing the portable terminal regardless of the on / off state of the portable terminal in the charging cradle, to secure the capacity of the rechargeable battery sufficiently. .

In accordance with another aspect of the present invention, there is provided a battery charging system for a portable terminal, comprising: a portable terminal connected to the battery to maintain and output a voltage higher than or equal to a predetermined value regardless of power on / off; It characterized in that it comprises a charging cradle for charging the battery depending on whether the recognition using the voltage.

In addition, the present invention is a battery charging system of a mobile terminal, the process of maintaining and outputting a voltage above a predetermined value through a recognition terminal irrespective of the on / off of the power in the portable terminal, and the portable terminal and the charging cradle Determining whether the mobile terminal is recognized by the charging cradle using the connection process, the voltage output from the mobile terminal, and, when recognizing the mobile terminal, checking whether there is a power supply from the outside, and And a step of charging the battery of the portable terminal when there is power supply, and detecting the power supplied to the battery of the portable terminal to indicate that the battery is being charged.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is confirmed that the detailed description of the related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

2A is a block diagram of a portable terminal according to an exemplary embodiment of the present invention.

As shown in FIG. 2A, the portable terminal 200 includes a key input unit 210, a display unit 220, an audio processor 225, an interface unit 230, a battery 240, a power supply unit 250, and a battery manager. 260, a memory 270, and a controller 280.

The key input unit 210 includes a character key, a numeric key, various function keys, and an external volume key to output a key input signal corresponding to a key input by a user to the controller 280.

The display unit 220 may be formed of a liquid crystal display (LCD) or the like, and outputs various display data generated by the portable terminal 200. In this case, when the LCD is implemented using a touch screen method, the display unit 220 may operate as an input unit.

The audio processor 225 modulates an electrical signal input from a microphone and converts the electrical signal into voice data. The audio processor 225 demodulates the encoded voice data input from a wireless transmitter / receiver (not shown) into an electrical signal and outputs it to a speaker. do.

In addition, the audio processing unit 225 preferably includes a codec for converting and reproducing the digital audio signal received by the wireless transmitter / receiver into an analog signal or converting an analog audio signal generated from a microphone into a digital audio signal. The codec consists of a data codec for processing packet data and an audio codec for processing an audio signal such as voice. Codecs may be separately provided or included in the controller 280.

2B is a block diagram of an interface unit according to a preferred embodiment of the present invention.

The interface unit 230 includes a + terminal and a ground terminal for charging the battery of the portable terminal 200 from the charging cradle 300.

As shown in FIG. 2B, the mobile terminal 200 and the charging cradle 300 are connected to each other, and the interface unit 230 is connected to the + terminal of the battery 240 to receive the voltage input from the charging cradle 300 ( Or current) to the battery 240.

In addition, the interface unit 230 is a recognition terminal connected to the reverse current prevention diode (D1) of the current input from the charging cradle 300, the reverse current prevention diode (D1) and the battery 240 by the voltage divider (R1, R2). 235, and the recognition terminal 235 maintains and outputs a voltage of the battery 240 at a predetermined value (for example, 1.5V) or more regardless of on / off of the mobile terminal 200, and charges the battery. Used as a pin for controlling the cradle 300.

The battery 240 is connected to the charging cradle 300 through the interface unit 230 and applies a voltage charged from the charging cradle 300 to the power supply 250.

The power supply unit 250 adjusts the voltage applied from the battery 240 to an appropriate level, and then supplies the DC voltage to each component of the mobile terminal 200.

The battery manager 260 measures the voltage and state of the battery 240 (battery monitoring data) at a predetermined time period and outputs the measured information to the controller 280, and the battery manager 260 may be included in the controller 280. .

In addition, the battery manager 260 may include the charge and discharge currents of the battery 240 and the mobile terminal 200, the remaining capacity of the battery, the temperature of the battery pack, the amount of charge of the battery when fully charged, the design capacity of the initial battery, and the like. The information is output to the control unit 120 together with the information.

The memory unit 270 may be configured as a ROM, a RAM, a flash RAM, and the like. A read only memory (ROM) stores microcode and reference data of a program for processing and controlling the controller 280.

In particular, an operation execution program according to the detection and display of information on the remaining battery level and state according to the present invention is encoded and stored. Random Access Memory (RAM) is a working memory of the controller 280 that stores temporary data generated during various program executions. Flash memory stores various updatable archiving data such as phone books.

In the embodiment of the present invention, the memory unit 270 stores a battery voltage (data) measured by the battery manager 260 and a battery usage time table corresponding to the battery voltage.

In addition, the memory unit 270 may include a battery voltage measured by the battery manager 260, a battery usage time table corresponding to the battery voltage, a received signal strength input from an antenna (not shown), and a received electric field strength corresponding to the received signal strength. In addition, the battery consumption voltage, the remaining voltage of the battery corresponding to the received electric field strength, and the battery usage time according to the remaining voltage of the battery are stored in a table.

The controller 280 controls the overall operation of the mobile terminal 200 according to an embodiment of the present invention, and checks the voltage of the battery 240 measured by the battery manager 260 to calculate the state of charge and the estimated time for completion of charging. And then print. In this case, the controller 280 may output the charging state and the estimated charging completion time using at least one of a voice and a text.

The controller 280 may calculate an estimated talk time and an estimated usage time of the battery 240 using the tables stored in the memory 270.

3 is a block diagram illustrating a charging cradle for charging a mobile terminal according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the charging cradle 300 having the mobile terminal 200 detachable recognition function of the present invention includes a connector 310, a charging unit 320, an auxiliary battery 330, a power management unit 340, The display unit 350 includes a main processor 360 and an audio processor.

The connector 310 provides a connection function with an interface unit (+ terminal, recognition terminal, ground terminal) of the portable terminal 200.

The charging unit 320 is connected to the mobile terminal 200 through the connector 310 and supplies power (or voltage) input from the outside to the battery 240 and the auxiliary battery 330 of the mobile terminal 200.

If there is no power supply from the charging unit 320, the auxiliary battery 330 is supplied to the battery 240 of the portable terminal 200 as charging power. In addition, since the auxiliary battery 330 will always be in a charged state, it may be configured to charge the battery 240 of the portable terminal 200 first when the portable terminal 200 is connected.

The power manager 340 supplies a reference voltage (for example, 2.85V) to the main processor 360 to detect whether the portable terminal 200 is recognized when the portable terminal 200 is mounted, and the power manager 340. ) May be included in the main processor 360.

At this time, the power management unit 340 detects the power supplied from the charging unit 320 to the battery 240 of the portable terminal 200 and the display unit 350 indicates that the battery 240 of the portable terminal 200 is being charged. To display. That is, the built-in auxiliary battery 330 in the charging cradle 300 to expand the battery by charging the battery 240 of the mobile terminal 200 with the charging power of the auxiliary battery 330 even in a place where there is no power or a power failure It will perform the same functions as the pack.

In addition, the power manager 340 detects the power supplied from the charging unit 320 to the auxiliary battery 330 and displays the auxiliary battery 330 in the charging state on the display unit 350.

The main processor 360 determines whether the portable terminal 200 is recognized using the voltage output from the recognition terminal 235 of the portable terminal 200 through the connector 310, and whether the portable terminal 200 is recognized. As a result, the battery 240 is charged by the power supply of the charging unit 320 or the display unit 350 displays the detached state of the portable terminal 200. That is, the main processor 360 detects whether the voltage output from the recognition terminal 235 of the portable terminal 200 and the portable terminal 200 output from the power manager 340 are recognized through the connector 310. The reference voltage is compared to determine whether the portable terminal 200 is recognized, and when the portable terminal 200 is not recognized, the auxiliary battery 330 is charged by the power supply of the charging unit 320.

When the mobile terminal 200 is recognized, the main processor 360 checks whether there is power supply from the outside, and if there is power supply, charges the battery 240 of the mobile terminal 200 with the power supply of the charging unit 320. When there is no power supply from the outside, the battery 240 of the portable terminal 200 is charged by the charging power of the auxiliary battery 330.

When the portable terminal 200 is recognized, the audio processor 370 may include a voice of the other party or various videos of the portable terminal 200 connected to the call according to a control signal output from the portable terminal 200 through the recognition terminal 235. The related data is converted into an audio signal and reproduced, and the output is made through a speaker.

4 is a perspective view of a charging cradle for charging a mobile terminal according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the charging cradle 300 of the present invention is mounted on the cradle body 400 and the cradle body 400 to be infiltrated or protruded from an upper surface of the cradle body 400 depending on whether the user is pressed. It consists of a push-up type cradle that is placed. The mounting body 400 has a box shape, and the push-up type mounting stand is rotatably mounted about the rotation axis A in an upper middle region thereof.

The mounting body 400 is provided with a stereo sound system that emits stereo sound, and consists of a configuration in which the speakers 410 and 420 are mounted on the upper surface of the mounting body 400, respectively. In particular, the stereo sound system is mounted on the upper surface of the mounting body 400, thereby improving listening feeling in various video-related modes during charging charging of the mobile terminal 200.

Referring to the operation and effect of the embodiment of the present invention configured as described above are as follows.

5 is a flowchart of a method for charging a portable terminal according to an exemplary embodiment of the present invention.

As shown in FIG. 5, first, the portable terminal 200 maintains and outputs the voltage of the battery 240 above a predetermined value through the recognition terminal 235 regardless of the on / off state of the power supply (S500). .

After the charging cradle 300 is connected to the mobile terminal 200 through the connector 310 (S510), the mobile terminal 200 is recognized using the voltage output from the recognition terminal 235 of the mobile terminal 200. Determine (S520). That is, the charging cradle 300 is connected to the portable terminal 200 to detect whether the voltage output from the recognition terminal 235 of the portable terminal 200 and the portable terminal 200 output from the power manager 340 are detected. It is determined whether the portable terminal 200 is recognized by comparing the reference voltages.

The charging cradle 300 does not recognize the mobile terminal 200 when the voltage output from the recognition terminal 235 of the mobile terminal 200 is higher than the reference voltage output from the power management unit 340. The detached state of the display unit 350 is displayed and the portable terminal 200 is notified of this (S530). Thereafter, the auxiliary battery 330 is charged by the power supply of the charging unit 320.

The charging cradle 300 detects power supplied from the charging unit 320 to the auxiliary battery 330 and indicates that the auxiliary battery 330 is being charged.

When the voltage output from the recognition terminal 235 of the portable terminal 200 is less than the reference voltage output from the power management unit 340, the charging cradle 300 recognizes the portable terminal 200 to supply power from the outside. Check whether there is (S540).

Then, the charging cradle 300 charges the battery 240 of the mobile terminal 200 by the power supply of the charging unit 320 when there is a power supply from the outside, and the charging power of the auxiliary battery 330 when there is no power supply from the outside. The battery 240 of the mobile terminal 200 is charged (S550).

The charging cradle 300 detects the power supplied from the charging unit 320 to the battery 330 and indicates that the battery 240 of the mobile terminal 200 is being charged (S560).

In addition, when the charging cradle 300 recognizes the portable terminal 200, the voice of the other party or the portable terminal 200 connected to the call according to the control signal output from the portable terminal 200 through the recognition terminal 235. It converts and plays various video and related data into audio signal and outputs it through speaker.

At this time, the portable terminal 200 preferably notifies the start of charging of the battery 240 from the charging cradle 300 by text and voice through the display unit 220 or the audio processor 225. On the other hand, the portable terminal 200 may stop the driving of the display unit 220 when a predetermined time elapses after notifying the start of charging the battery 240 through the display unit 220 to reduce unnecessary current consumption.

When the charging power is input from the charging cradle 300, the mobile terminal 200 checks the voltage of the battery 240 (S570), calculates an estimated time for completion of charging using the current voltage of the battery 240, and calculates the calculated power. Outputs the estimated time of completion of charging and the state of charge (S580). That is, the mobile terminal 200 compares the current voltage of the battery 240 with the voltage of the battery 240 at the completion of the charge to calculate the state of charge and the completion time of the charge, and then outputs the text or voice or simultaneously outputs the text and the voice. You may.

Thereafter, the mobile terminal 200 checks whether the charging of the battery 240 is completed (S590).

The mobile terminal 200 checks the voltage of the battery 240 when the battery 240 is not completely charged as a result of the check, and if the battery 240 is fully charged, that is, when the battery 240 is fully charged, the charging cradle 300 is completed. Notify, and outputs at least one of the text or voice and ends (S600).

As described above, the battery charging system and method of the mobile terminal according to the preferred embodiment of the present invention can be made. Meanwhile, the above description of the present invention has been described with reference to specific embodiments, but various modifications can be made without departing from the gist of the present invention. There may be various embodiments. Therefore, the scope of the present invention should not be defined by the described embodiments, but by the claims and equivalents of the claims.

According to the present invention made as described above, the capacity of the rechargeable battery can be sufficiently secured by enabling the portable terminal to be recognized regardless of the on / off state of the portable terminal in the charging cradle.

Claims (15)

In the battery charging system of a mobile terminal, A mobile terminal connected to the battery to maintain and output a voltage higher than a predetermined value regardless of power on / off; And a charging cradle for charging the battery according to whether or not it is recognized using the voltage output from the portable terminal. The portable terminal of claim 1, further comprising: a + terminal and a ground terminal for charging a battery; And an interface having a recognition terminal connected between the reverse current preventing diode of the current input from the charging cradle, the reverse current preventing diode, and a + terminal of the battery with a voltage dividing resistor. 3. The portable terminal of claim 2, further comprising: a power supply unit for supplying each component to the portable terminal with a DC voltage after adjusting a voltage applied from a battery to an appropriate level; A battery manager which measures the voltage and state of the battery at predetermined time periods; A memory unit for storing the measured battery voltage and a battery usage time table corresponding to the battery voltage; And a controller which controls the overall operation of the portable terminal and calculates a state of charge of the battery and an estimated time of completion of charging by checking the measured voltage of the battery. The battery charging system of claim 3, wherein the controller calculates an estimated talk time and an estimated usage time of a battery using tables stored in the memory unit. According to claim 1, wherein the charging cradle is a connector for providing a connection function with the interface unit of the portable terminal; A charging unit connected to the portable terminal through the connector to supply power input from the outside to the battery of the portable terminal; An auxiliary battery that supplies the battery of the portable terminal with charging power when there is no power supply from the charging unit; A power management unit for supplying a reference voltage for detecting whether the portable terminal is mounted or not; And a main processor comparing the reference voltage with the voltage output from the portable terminal to determine whether to recognize the battery and charging the battery of the portable terminal or displaying a detached state of the portable terminal by supplying power to the charging unit. Battery charging system of a mobile terminal. The mobile terminal of claim 5, wherein when the portable terminal is recognized, the charging cradle is a voice signal of the other party or various video and related data of the portable terminal connected to the call according to a control signal output through the recognition terminal of the portable terminal as an audio signal. The battery charging system of the portable terminal, characterized in that it further comprises an audio processing unit for converting and playing. The battery charging system of claim 5, wherein the power manager detects power supplied from the charging unit to the battery of the portable terminal or the auxiliary battery, and displays the battery in a charging state on the display unit. The portable terminal of claim 5, wherein when the voltage output from the portable terminal device is greater than the reference voltage, the main processor does not recognize the portable terminal and displays a detachment state of the portable terminal and notifies the portable terminal of the charging unit. The battery charging system of a portable terminal, characterized in that for charging the auxiliary battery by a power supply. The portable terminal of claim 8, wherein the main processor recognizes the portable terminal when the voltage output from the portable terminal is less than the reference voltage and supplies power to the charging unit or the auxiliary battery according to the confirmation of the power supply from the outside. A battery charging system of a portable terminal, characterized in that for charging the battery. In the battery charging method of a mobile terminal, Maintaining and outputting a voltage at a predetermined value or more through a recognition terminal regardless of power on / off in the mobile terminal; Connecting the portable terminal and the charging cradle; Determining whether the mobile terminal is recognized by the charging cradle using the voltage output from the mobile terminal; When the mobile terminal is recognized, checking whether there is a power supply from the outside; Charging a battery of the mobile terminal when there is a power supply from the outside; And detecting the power supplied to the battery of the portable terminal to indicate that the battery is being charged. The method of claim 10, wherein the determining comprises: not recognizing the mobile terminal when the voltage output from the mobile terminal is greater than the reference voltage of the charging cradle; If the voltage output from the portable terminal is less than the reference voltage of the charging cradle, the method of charging the battery of the portable terminal further comprising the step of recognizing the portable terminal. The method of claim 11, wherein the step of not recognizing the portable terminal comprises displaying a detached state of the portable terminal, notifying the portable terminal, and charging the auxiliary battery. The method of claim 11, wherein the recognizing of the mobile terminal comprises converting the voice of the other party connected to the call or various video and related data of the mobile terminal into an audio signal according to a control signal output from the mobile terminal. A battery charging method of a mobile terminal, comprising the steps of playing and outputting. The method of claim 10, wherein the checking further comprises charging the battery of the portable terminal with an auxiliary battery when there is no power supply from the outside. The method of claim 10, further comprising: checking a voltage of a battery when charging power is input from a charging cradle in the portable terminal; Calculating an estimated charge completion time using the current voltage of the battery and outputting the calculated estimated charge completion time and state of charge; Checking whether the battery is fully charged; And as a result of confirming the charging of the battery, when the charging state of the battery is completed, ending the charging of the battery.

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