KR100460513B1 - A charging device and a operating method there of for wll cellular phone - Google Patents

Abstract

The present invention relates to a battery charging apparatus using a main control unit of a wireless subscriber network terminal and a method of operating the same, the battery charging apparatus of a wireless subscriber network terminal; A control unit for outputting the current of the DC power input in a controlled state by a corresponding control signal; A diode which makes the flow direction of the current output from the adjusting unit constant; A battery charged by a current applied through the diode; A thermistor for detecting a temperature change of the battery and outputting a corresponding signal as an analog signal; A detector for detecting a voltage change of the battery and outputting a corresponding signal as an analog signal; The total size of the terminal is reduced by the main control part which inputs and analyzes the analog signal output from the thermistor and the detection part and detects the state of charge of the battery and outputs the corresponding control signal to the control part. It is cheap, easy to move and beautiful in appearance, and also has the effect of extending the life and stability of the battery.

Description

Battery charging device for wireless subscriber network terminal and its operation method {A CHARGING DEVICE AND A OPERATING METHOD THERE OF FOR WLL CELLULAR PHONE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charging apparatus for a wireless subscriber network (WLL) terminal and a method of operating the same. More particularly, the present invention relates to controlling battery charging using a main controller of a wireless subscriber network (WLL) terminal.

A communication device capable of communicating without a line connection is called a wireless communication device, and a communication terminal of the wireless communication device is called a mobile terminal or a mobile terminal (hereinafter referred to as a terminal).

Such a terminal may wirelessly communicate, but receives power from a built-in battery to operate while moving.

In addition, with the development of wireless communication technology, an economical technology called code division multiple access (CDMA) has been developed in which a large number of subscribers can simultaneously communicate a limited number of radio frequency resources.

WIRELESS LOCAL LOOP (WLL) is a method of constructing a line or line between a telephone company and a terminal by using a wireless system instead of a wire. It was first devised to reduce the enormous cost of making a phone call in a sparse area, and the technology of the wireless system was analog frequency division multiple access (FDMA) and digital time division multiple access (TDMA). TIME DIVISIONMULTIPLE ACCESS) and CODE DIVISION MULTIPLE ACCESS (CDMA) are being used, and CDMA is being applied to the maximum subscribers with limited frequency resources.

The wireless subscriber network (WLL) is easy to establish a subscriber line and shorten the time required to start the service, compared to the existing subscriber network that connects from the switch to the subscriber terminal by wire, and the installation cost is almost constant regardless of distance. The cost can be reduced, the payback is quick, and the network can be expanded quickly as the subscriber call volume increases.

On the other hand, WLL has similar characteristics to a mobile communication network in terms of using a wireless channel as a communication medium. However, since the mobility of the corresponding terminal is extremely limited in units of cells, the WLL has an advantage of being much better than mobile communication in terms of radio environment. .

Hereinafter, a battery charging apparatus for a wireless subscriber network terminal according to the prior art will be described with reference to the accompanying drawings.

Attached to explain the prior art, Figure 1 is a functional configuration of the battery charger of the wireless subscriber network terminal according to the prior art.

Referring to FIG. 1, the battery charging apparatus for a wireless subscriber network (WLL) terminal according to the related art is provided with a regulator 10 for receiving a DC power DC and outputting a constant current. ,

Diode (DIODE) 20 to prevent the current output from the control unit 10 to flow in the opposite direction,

A battery 30 that is charged with a current applied through the diode 20;

A thermal sensor 40 for detecting a temperature change according to the charging of the battery 30 and outputting a corresponding signal;

Charging by controlling the rapid charge and full charge by controlling the amount of current charging the battery 30 by receiving the voltage change and the signal output from the thermal sensor 40 according to the charging of the battery 30 The controller 50,

When the DC power DC is input, the DC power is applied to operate normally. When the DC power is not input, the power output from the battery 30 is transferred through a separate path not shown in the drawing. It consists of a terminal 60 that is normally operating under the authorization.

Hereinafter, a battery charging apparatus for a wireless subscriber network terminal 60 according to the related art having the above configuration will be described in detail with reference to FIG. 1.

The terminal 60 of the wireless subscriber network (WLL) needs a DC power source for operation, and the DC power source is supplied from the outside and supplied to the terminal 60 and output at a constant current by the controller 10. , And flows through the diode 20 in a predetermined direction.

The current output from the diode 20 charges the battery 30, and the battery 30 is a secondary power source, and generally NiCd (NICKEL CADMIUM), NiMH (NICKEL METAL-HYDRIDE), and Li-. It is a RECHARGEABLE battery using ION (LITHIUM-ION).

The battery 30 is built in the terminal 60, but since the mobility of the wireless subscriber terminal 60 is extremely limited, the size of the terminal is relatively large, and thus the battery 30 is not limited in size.

As described above, the battery 30 that receives a constant output current from the diode 20 is charged, and the battery 30 generates various unique characteristics during the charging process. For example, when the battery is fully charged, The voltage decreases, the rate of charge voltage rise decreases, and there is no voltage change for a certain time, and the internal temperature rises rapidly.

There are various methods for charging the battery 30, such as charging for a predetermined time or using the charging characteristics of the battery as described above. However, in order to charge the battery rapidly, the battery 30 is charged rapidly by supplying an overcurrent to the initial stage of charging. If the battery is sufficiently charged, the battery is slowly charged by supplying a weak current in consideration of battery life and safety.

That is, the battery 30 is initially rapidly charged by the overcurrent output from the diode 20, and when the battery 30 is charged to some extent, the internal voltage increase rate decreases, and at some point, there is no voltage fluctuation. Voltage change occurs.

The charge control unit 50 detects the voltage change of the battery 30 as described above, and the charge control unit 50 controls the control unit 10 to control the amount of charging current to be output properly.

In addition, the charge control unit 50 controls the control unit 10 by a control signal output from the thermal sensor 40 for detecting a change in the internal temperature of the battery 30, which extends the life of the battery Considering the safety of charging.

However, the prior art as described above flows a lot of overcurrent for rapid charging at the initial stage of charging the battery 30, thereby shortening the life of the battery 30 when proper control is not achieved and seriously affecting the terminal 60 itself. There is a problem that affects.

In addition, since a charge control unit for charging the battery 30 and a printed circuit board (PCB) for peripheral circuits are required, it is difficult to miniaturize the overall size of the wireless subscriber network terminal 60 and increase the product cost. have.

It is an object of the present invention to provide a battery charging control device and a method of operating the same, which can be used to securely charge a battery by using some functions of a main controller built in a terminal, and to reduce the size of a terminal and reduce the cost.

The present invention devised to achieve the above object, in the battery charging apparatus of the wireless subscriber network terminal; A control unit for outputting the current of the DC power input in a controlled state by a corresponding control signal; A diode which makes the flow direction of the current output from the adjusting unit constant; A battery charged by a current applied through the diode; A thermistor for detecting a temperature change of the battery and outputting a corresponding signal as an analog signal; A detector for detecting a voltage change of the battery and outputting a corresponding signal as an analog signal; An analog signal output from the thermistor and the detection unit is input and analyzed to detect the state of charge of the battery, and the main control unit for outputting the control signal to the control unit.

In addition, the present invention has been made in order to achieve the above object, the main control unit for the charging of the battery and the initial process of initializing all the coefficients necessary for operation; A charging step of initializing a value of the operation coefficient in the above process and controlling the input / output unit to output a high level signal to the controller to allow the battery charging current to flow; A holding step of stopping the operation for charging control for a predetermined inspection time while the charging current flows; A measurement process of calculating a charging time, measuring a voltage and a temperature of a battery by the main control unit after a predetermined time by the process; An operation process of calculating the charging time, the voltage drop, the voltage stop, the temperature increase rate, and the temperature sensing method using the values measured in the process and determining whether or not it is suitable for a predetermined level; Stopping the battery charging current by outputting a low level signal to the controller by controlling the input / output unit when it is determined to be suitable for each predetermined level in the process; After the battery charging is stopped by the above process, the trickle charge of the battery is terminated after the trickle charge, and the trickle charge process is terminated immediately if the trickle charge is not performed.

1 is a functional configuration of a battery charger of a wireless subscriber network terminal according to the prior art,

2 is a functional configuration diagram of a wireless subscriber network terminal battery charging apparatus according to the present invention,

3 is a flowchart illustrating an operation of a wireless subscriber network terminal battery charging apparatus according to the present invention.

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

10,100: control unit 20,110: diode

30,120: Battery 40: Thermal sensor

50: charge control unit 60: terminal

130: thermistor 140: pull-up resistor

150: converter 160: detector

162: first resistor 164: second resistor

170: control unit 180: input / output unit

190: subject fisherman

Hereinafter, a battery charging device and a method of operating the same according to the present invention will be described with reference to the accompanying drawings.

2 is a functional configuration diagram of the wireless subscriber network terminal battery charging apparatus according to the present invention, Figure 3 is a flow chart of the operation of the wireless subscriber network terminal battery charging apparatus according to the present invention.

2, the battery charging window of the wireless subscriber network terminal according to the present invention, the control unit 100 for outputting the current of the input DC power (DC) in the adjusted state by the control signal;

Diode (DIODE) (110) for maintaining a constant flow direction so that the current output from the control unit 100 is not applied in the reverse direction,

A battery 120 for charging by a current applied through the diode 110;

Detecting the temperature change of the battery 120 and outputting the corresponding signal as an analog signal, connected in series with the pull-up resistor 140 to change the temperature of the battery 120. And a thermistor (THERMISTOR) 130 for outputting the detected temperature change as an analog signal,

Detecting the voltage change of the battery 120 and outputting the corresponding signal as an analog signal, the first resistor (R1) 162 connected to the battery 120 and the ground connected to the ground (GROUND) The second resistor R2 164 is connected in series, and the detector 160 detects and outputs a voltage change of the battery 120 at a connection contact between the first and second resistors 162 and 164. Wow,

The analog signal output from the thermistor 130 and the detection unit 160 is input and analyzed to detect the state of charge of the battery 120, and output the corresponding control signal to the control unit 100. A converter (ADC: ANALOG TO DIGITAL CONVERTER) 150 for converting and outputting an analog signal applied from the thermistor 130 and the detector 160 into a digital signal; A controller 170 for inputting and analyzing a digital signal output from the converter 150 to recognize a charging state of the battery 120 and outputting a signal for controlling a charging current of the battery 120; The main control unit (MSM: MOBILE STATION MODEM) of the SOC (SYSTEM ON A CHIP) consisting of an input and output unit 180 for outputting a signal for controlling the current flow of the control unit 100 according to the signal of the controller 170 It is composed.

In addition, referring to the accompanying FIG. 3, in the method for operating a battery charger of a wireless subscriber network terminal according to the present invention, the main controller 190 is required for operation for charging the battery 120 (FACTOR). By initializing all), the wait time value T (CHK) for causing the main control unit 190 to stop charging control (HOLD); A charge time value (TIME OUT) by a charge time method (TIME CHARGE); A difference value DELTA_V between the battery voltage value V (BAT-1) measured by the previous process and the battery voltage value V (BAT) measured by the current process; A difference value DELTA_TEMP between the battery temperature value V (TEMP-1) measured by the previous process and the battery temperature value V (TEMP-1) measured by the current process; A maximum temperature value MAX_TEMP at which the battery 120 should not exceed when charging (CHARGING); A control value (TRICKLE CHARGE execution or not) for determining whether or not to perform trickle charging; An initial process (S10) of initializing the cycle value (T: TRICKLE ON / OFF) which determines the duration of the trickle charge to the set original value (S10),

After initializing the value of the OPERATING FACTOR in the initial process (S10), the input / output unit 180 is controlled to control a high level signal, for example, a signal of '1'. Charging process (S20) and the battery charging current flows by being output to the unit 100,

In the state in which the charging current flows by the charging process S20, the main controller 190 suspends the operation for charging control for a predetermined predetermined waiting time T (CHK) and performs the operation of another operation. Hold process to be able to do (S30),

After the waiting time T (CHK) by the holding process (S30), the charging time (TIME CHARGE) is calculated by the main controller 190, the voltage (V) and temperature (TEMP.) Of the battery 120. Measuring the elapsed time by setting a value of a calculation result of subtracting the waiting time value T (CHK) from the current charging time value TIMEOUT as the charging time value TIMEOUT Process (S40); A second step S50 of separately storing the previously measured battery voltage value V (BAT-1) and measuring and storing the current battery voltage value V (BAT); And a third step S60 of separately storing the previously measured battery temperature value V (TEMP-1) and measuring and storing the current battery temperature value V (TEMP),

Using the values measured in the measurement process, operation processing is performed by the method of CHARGE, VOLTAGE DROP, VOLTAGE PLATEAU, RATE OF TEMPERATURE INCREASE, and TEMPERATURE CUTOFF method. And determining whether the current charging time value TIMEOUT is less than or equal to 0 by determining whether or not the set level LEVEL is appropriate or not; The current measured battery voltage value V (BAT) minus the previously measured battery voltage value V (BAT-1) (-) is less than (<) the set voltage difference value DELTA_V. A second calculation process (S80) of determining; A third operation S90 of determining whether a value obtained by subtracting the previously measured battery voltage value V (BAT-1) from the currently measured battery voltage value V (BAT) is equal to (=) a zero value; To determine whether the value obtained by subtracting the previously measured battery temperature value V (TEMP-1) from the measured battery temperature value V (TEMP) (-) is greater than the set temperature difference value DELTA_TEMP (>). A fourth calculation process S100 and a fifth calculation process S110 which determines whether the currently measured battery temperature value V (TEMP) is greater than (>) a predetermined maximum temperature value MAX_TEMP; ,

If it is determined that it meets the predetermined criterion of the predetermined level in the operation process, the input and output unit 180 is controlled to a low level (LOW LEVEL) signal. For example, by stopping the battery charging current by outputting a value of '0' to the control unit 100 (S120),

After stopping the charging of the battery 120 by the stopping process (S120), when the trickle charge (TRICKLE CHARGE) of the battery 120 is terminated after the trickle charge, the trickle charge is not Is immediately terminated, and it is determined whether a control value (TRICKLE CHARGE execution) is set in the initial process (S10) to determine whether to perform a trickle charge (TRICKLE CHARGE), and the determination result control value (TRICKLE CHARGE) If execution is not set, the determination process proceeds to the end (S130); If the control value (TRICKLE CHARGE execution is set) is determined in the trickle determination process (S130), the trickle charge process of charging by the cycle value (T: TRICKLE ON / OFF) set in the initial process (S10) It consists of a trickle process consisting of (S140).

Hereinafter, according to the present invention having the configuration described above, the battery charging apparatus and its operation method of the wireless subscriber network terminal will be described in detail with reference to FIGS.

The main control unit (MSM: MOBILE STATION MODEM) 190 is to process a communication signal protocol in a digital CDMA terminal, and as a SOC (SYSTEM ON A CHIP) integrating (INTEGRATED) a variety of functions in one chip (CHIP) In addition, functions such as ADC (ANALOG DIGITAL CONVERTER), which receives analog signals and converts them into digital signals, and output them, and general purpose input / output units (GPIO: GENERAL PURPOSE INPUT OUTPUT) that can be controlled by a program have.

When a direct current power source (DC) for charging the battery 120 of the wireless subscriber network (WLL) terminal is applied, a constant charging current controlled by the control unit 100 is output, and the control unit 100 as described above. The charging current output through) flows in one direction by the diode 110 and does not flow in the opposite direction.

As described above, the charging current applied through the diode 110 is input to the charging / discharging battery 120 made of NiCd / NiMH / Li-Ion or the like to charge the battery 120.

The change in the internal voltage of the battery 120 charged as described above is detected at a predetermined level by the detector 160 including the first resistor 162 and the second resistor 164, and the main controller 190 of the main controller 190 is changed. The first resistor 162 and the second resistor 164 are applied to a conversion unit (ADC) 150 and use a large value of resistor to reduce current consumption.

In addition, a change in the internal temperature of the battery 120 charged as described above is detected by the thermistor 130, and a signal detected by the resistance proportionality of the thermistor 130 and the pull-up resistor 140 is the main controller. It is applied to the converter (ADC) 150 of 190.

The thermistor 130 may use a variable resistance NTC (NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR), the resistance of which decreases as the temperature increases, and a PTC (POSITIVE TEMPERATURE) of the variable resistance that increases in resistance as temperature increases. COEFFICIENT THERMISTOR) can be used.

As described above, signals corresponding to the internal voltage and the internal temperature of the battery 120 respectively detected by the detector 160 and the thermistor 130 are converted into digital signals by the converter 150, The signal converted into a signal is applied to the control unit 170 and analyzed.

The controller 170 of the main controller 190 outputs a signal controlling the charging of the battery 120 to the input / output unit 180 using the analyzed result, and the input / output unit 180 The control signal 1700 outputs a high level '1' signal or a low level '0' signal.

As described above, the signal output from the input / output unit 180 of the main control unit 190 is applied to the adjusting unit 100, and the adjusting unit 100 is connected to the DC power by a signal applied from the input / output unit 180. The charging current applied by the DC may or may not be output to the diode 110.

For example, when the high level control signal is applied from the input / output unit 180, the control unit 100 outputs the charging current by the DC power supply DC to the diode 110, and the low level control signal is applied. When applied, the function does not output the charging current by the DC power supply to the diode 110. For example, a regulator circuit that allows a constant current to flow may be used, or simply a transistor. ) Can also be used.

As described above, the operation method using the wireless subscriber network terminal battery charging apparatus of the present invention, the standby time value T (CHK) and the charging time value (TIMEOUT) by the control unit 170 constituting the main controller 190 ), Coefficients such as voltage difference value (DELTA_V), temperature difference value (DELTA_TEMP), maximum temperature value (MAX_TEMP), control value (TRICKLE CHARGE execution), and periodic value (T: TRICKLE ON / OFF) (INITIALIZING) to the initial value (S10).

As described above, the controller 170 of the main control unit 190 initializes the coefficient values by the initial process (S10), and then outputs a corresponding control signal to the input / output unit 180 so that the input / output unit 180 has a high level. To output the '1' signal to the control unit 100 (S20).

The control unit 100 receives the high level signal by the charging process S20 and outputs the input DC power DC to the diode 110, thereby charging the battery 120.

The main subscriber unit (MSM) 190 is configured as one in the wireless subscriber network terminal, and the main controller 190 cannot perform other functions while the battery charge control is performed, and the charge control is controlled at a predetermined time interval. Since there is no excessive force, other tasks or functions are performed during the waiting time T (CHK) (S30).

That is, during the waiting time T (CHK) by the holding process (S30), the main control unit 190 performs other functions without the battery charge control, but the adjustment of the already controlled state The unit 100 outputs a charging current to the diode 110 to continue charging the battery (S30).

After the hold process (S30), the main controller 190 starts the battery charging control again, subtracts the waiting time value (T (CHK)) from the current charging time value (TIMEOUT), Set the operation result of the new current charging time value (TIMEOUT) (S40).

In addition, the main controller 190 sets the internal voltage value of the battery 120, which has already been measured, to the previous battery voltage value V (BAT-1), and at the same time, the inside of the battery 120 through the detection unit 160. The voltage is measured again and set to the current battery voltage value V (BAT) (S50).

In addition, the main controller 190 sets the internal temperature value of the battery 120, which has already been measured, to a previous battery internal temperature value V (TEMP-1), and at the same time, the battery 120 of the battery 120 through the thermistor 130. Measure the internal temperature again and set the current battery internal temperature value (V (TEMP)) (S60).

The main controller 190 uses the previous and present voltage values and temperature values of the battery 120 measured by the measurement process S40, S50, and S60 to charge the time and drop the voltage. Calculates the results required for the control of the voltage stop, the rate of temperature increment, and the temperature cutoff method.

That is, the controller 170 of the main control unit 190 determines whether the current charging time value TIMEOUT is smaller than or equal to a value of '0', and if large, returns to the charging process S20, When the charging time value (TIMEOUT) is a value of '0' or less than '0', charging is continued for a predetermined time, and the low level is controlled by controlling the input / output unit 180. By the '0' signal is output to the control unit 100, by temporarily shutting off the charge, forcibly charging the battery 120 for a set time.

After the charging is completed for a predetermined time set by the charging time (TIME CHARGE) as described above, the charging of the battery 120 is stopped, and whether the control value (TRICKLE CHARGE execution or not) is set in the initial process (S10). If it is not determined (S130), charging is completely terminated if not set, and if the control value (TRICKLE CHARGE execution) is set, the cycle value (T: TRICKLE ON /) set by the initial process (S10) is set. OFF) outputs a low level '0' signal to the input / output unit 180 during T: TRICKLE ON and a high level '1' signal to the input / output unit 180 during T: TRICKLE OFF Charge (S140) and complete charging is complete.

In addition, in the operation process, the main controller 190 subtracts the previous battery internal voltage value V (BAT-1) from the current battery internal voltage value V (BAT), and then the initial process ( It is determined whether the value is smaller than the voltage difference value DELTA_V set by S10. In the case of a large value, it is fed back to the charging process S20, and if it is a small value, the stop process S120. In step S80, a voltage drop charging control method or method is performed.

In addition, in the calculation process, the main controller 190 subtracts the previous battery internal voltage value V (BAT-1) from the current battery internal voltage value V (BAT), and then the value of the result. It is determined whether the value is '0'. If it is not the value of '0', it is fed back to the charging process (S20), and if the value is '0', the stop process (S120). VOLTAGE PLATEAU Charge control method or method to proceed to.

In addition, in the calculation process, the main controller 190 subtracts the previous battery internal temperature value V (TEMP-1) from the current battery internal temperature value V (TEMP), and then the value of the result. It is determined whether it is larger than the temperature difference value DELTA_TEMP set in the initial process S10. If the result is not a large value, it is fed back to the charging process S20, and the temperature difference value DELTA_TEMP is determined. If the value is greater than), the RATE OF TEMPERATURE INCREASE charge control method proceeds to the stop process (S120).

In addition, the main controller 190 determines whether the current battery internal temperature value V (TEMP) is greater than the maximum temperature value MAX_TEMP set in the initial process S10. If the value is not the feedback (FEEDBACK) to the charging process (S20), if the value is greater than the maximum temperature value (MAX_TEMP) if the value is carried out the temperature sensing (TEMPERATURE CUTOFF) charge control method to proceed to the stop process (S120) do.

Various charging control methods as described above may be used in one or more than one, but in consideration of the lifespan protection and safety of the battery 120 for charging and discharging, the charging control of various methods are performed in parallel.

In addition, even after performing the charge control method as described above, the trickle charge (TRICKLE CHARGE) by the trickle process to increase the completeness of charging of the battery, the control value (TRICKLE CHARGE execution or not) is set in the initial process (S10) It is determined whether or not it is set or not (S130), if it is set by the period value (T: TRICKLE ON / OFF) set in the initial process (S10) has an idle time not charging for a certain time again for a certain time After charging, the charging control is completely terminated.

In other words, the charging control method is selected and applied in duplicate, thereby extending the life of the battery 120 and improving the stability such as reducing the risk of damage due to heat generation.

In addition, the various charging control schemes are briefly displayed in the order of FIG. 3 as follows.

Charge control method Step 3 TIME CHARGE S10, S20, S30, S40, S70, S120 VOLTAGE DROP S10, S20, S30, S50, S80, S120 VOLTAGE PLATEAU S10, S20, S30, S50, S90, S120 RATE OF TEMPERATURE INCREASE S10, S20, S30, S60, S100, S120 TEMPERATURE CUTOFF S10, S20, S30, S60, S110, S120 TRICKLE CHARGE S130, S140

Accordingly, the present invention does not use a separate charging control unit 50 and an additional circuit in charging a battery for charging and charging a wireless subscriber network terminal, so that the size can be reduced and the manufacturing cost can be reduced. By applying this, the battery life is extended and safety is increased.

The present invention having the above-described configuration controls the charging of the battery by using some spare functions among various functions provided in the main control unit (MSM) of the wireless subscriber network terminal, thereby reducing the overall size of the terminal and reducing the manufacturing cost. There is an industrial use effect.

In addition, since the terminal is manufactured in a small size, there is a convenient effect in terms of ease of movement and beautiful appearance.

In addition, since various charging control methods can be used at the same time, there is an industrial use effect to increase the life and stability of the battery.

Claims (8)

In the battery charging device of a wireless subscriber network terminal, Control unit for outputting the current of the DC power input in the control state by the control signal, A diode which makes the flow direction of the current output from the adjusting unit constant; A battery charged by a current applied through the diode, A thermistor for detecting a temperature change of the battery and outputting a corresponding signal as an analog signal; A detector for detecting a voltage change of the battery and outputting a corresponding signal as an analog signal; Inputting and analyzing the analog signal output from the thermistor and the detection unit detects the state of charge of the battery, and is composed of a main control unit for outputting the corresponding control signal to the control unit for charging the battery of the wireless subscriber network terminal Device. The method of claim 1, wherein the main control unit, A converter for converting and outputting an analog signal applied from the thermistor and the detector, respectively, to a digital signal; A controller for inputting and analyzing a digital signal output from the converter to recognize a charging state of the battery and output a signal for controlling a charging current of the battery; Battery charging apparatus for a wireless subscriber network terminal, characterized in that consisting of the input and output unit for outputting a signal for controlling the current flow of the control unit according to the signal of the control unit. According to claim 1, The detection unit is connected in series with a first resistor connected to the battery and a second resistor connected to the ground, and detects the voltage change of the battery at the connection contact of the first and second resistors and outputs the main controller, The thermistor is connected in series with a pull-up resistor detects the temperature change of the battery, and outputs the detected signal to the main control unit, the battery charging apparatus of the wireless subscriber network terminal. In order to charge the battery, the main control unit initializes all the coefficients necessary for operation, and After the initialization of the value of the operation coefficient in the above process, the charging process to flow the battery charging current by outputting a high level signal to the control unit by controlling the input and output, The main control unit is a holding step of stopping the operation for the charge control for a predetermined waiting time while the charging current flows by the above process; After a predetermined time by the above process, the charging process is calculated by the main controller, measuring the voltage and temperature of the battery, A calculation process using the value measured in the above process to calculate the charging time, the voltage drop, the voltage stop, the temperature increase rate, and the temperature sensing method and determine whether or not it is suitable for a predetermined level; A stop process of controlling the input / output unit to output a low level signal to the control unit and cutting off the battery charging current, when it is determined to be suitable for each predetermined level in the process; The wireless subscriber network terminal, characterized in that consisting of a trickle process of stopping the battery after the battery charging by the above process, the trickle charge is terminated after the trickle charge, and if the trickle charge is not terminated immediately How to operate the battery charger. The method of claim 4, wherein the initial process, A waiting time value for causing the main control unit to stop charging control; The charging time value by the charging time method, The difference between the battery voltage value of the previous process and the battery voltage value of the current process, The difference between the battery temperature value by the previous process and the battery temperature value by the current process, The maximum temperature that the battery must not exceed when charging, A control value for determining whether to perform trickle charging; A method of operating a battery charger of a wireless subscriber network terminal, characterized in that for initializing a period value for determining a time of a cycle of trickle charging to an original value set. The method of claim 4, wherein the measuring process, A first process of measuring elapsed time by setting a value of a calculation result of subtracting a waiting time value from the current charging time value as a charging time value; A second process of separately storing a previously measured battery voltage value and measuring and storing a current battery voltage value; And a third process of separately storing the previously measured battery temperature value and measuring and storing the current battery temperature value. The method of claim 4, wherein the operation process, A first operation process of determining whether a current charging time value is less than or equal to zero; A second calculation process of determining whether a value obtained by subtracting a previously measured battery voltage value from a currently measured battery voltage value is smaller than a predetermined predetermined voltage difference value; A third calculation process of determining whether a value obtained by subtracting a previously measured battery voltage value from a currently measured battery voltage value is equal to a zero value; A fourth calculation process of determining whether a value obtained by subtracting the previously measured battery temperature value from the currently measured battery temperature value is larger than a predetermined predetermined temperature difference value; And a fifth calculation process for determining whether the current measured battery temperature value is greater than a predetermined maximum temperature value. The method of claim 4, wherein the trickle process, Determining whether a control value for determining trickle charging is set in the initial process, and if the control value is not set as a result of the determination, the trickle determination process proceeds to an end; If the control value is determined in the process is set, the operation method of the battery charging device for a wireless subscriber network terminal, characterized in that consisting of a trickle charge process of charging by the cycle value set in the initial process.