KR100673476B1 - Charge method of second battery within electronic equipment utilized one of commercial alternating power source and dc power source of personal computer - Google Patents

Abstract

A charging method of a second battery within electronic equipment utilizing one of a commercial AC power source and a DC power source of a personal computer is provided to recharge a battery by reducing charging current in order to prevent overheat during the recharging of the battery. A charging method of a second battery within electronic equipment utilizing one of a commercial AC power source and a DC power source of a personal computer includes the steps of: connecting a USB cable unit to a portable terminal(S1); connecting the USB cable unit to a rectifying unit(S2); connecting a plug of the rectifying unit to a power consent(S3); determining whether a data signal is detected at a data communication line or not(S4); determining whether an output terminal of the USB cable unit is connected to the portable terminal or not(S5); rectifying the commercial AC power and dropping the rectified AC power to a predetermined level(S100); determining whether a secondary battery is mounted on an output terminal of the USB cable unit or not(S5a); determining whether the secondary battery is failed or over discharged(S7); and determining whether a charging voltage of the secondary battery is charged with a predetermined level or not(S22).

Description

CHARGE METHOD OF SECOND BATTERY WITHIN ELECTRONIC EQUIPMENT UTILIZED ONE OF COMMERCIAL ALTERNATING POWER SOURCE AND DC POWER SOURCE OF PERSONAL COMPUTER}

1 is a perspective view schematically showing a charging device for a secondary battery built in a conventional mobile phone,

Figure 2 is a perspective view schematically showing a charging device of a secondary battery built in another conventional mobile phone,

3 is a block diagram specifically showing FIG.

4 is a perspective view schematically showing a personal computer and an AC power charging device according to an embodiment of the present invention;

5 is a perspective view illustrating a state of charging a secondary battery mounted on a portable terminal with a DC power output from the personal computer using a USB cable unit of a personal computer and an AC power charging device according to an embodiment of the present invention;

6 is a block diagram of the rectifying unit in FIG.

7 is a block diagram of the USB cable unit in FIG.

Figure 8 (a) is a DC input voltage graph, Figure 8 (b) is a graph indicating the presence or absence of the secondary battery mounted on the portable terminal, Figure 8 (c) is a secondary battery that is mounted and charged in the portable terminal 8 is a graph showing a charging voltage, a graph showing a charging current according to a charging section,

9 is a flowchart illustrating a charging method for charging a secondary battery embedded in an electronic device using a personal computer and an AC power charging device according to an embodiment of the present invention;

FIG. 10 is a flowchart illustrating a method of full-wave rectifying the AC power by the full-wave rectifying unit 100 in FIG. 9 to drop the voltage to a predetermined level;

FIG. 11 illustrates that the USB terminal 121 of the USB cable unit 120 is inserted into the USB socket 203 of the personal computer 200 and output from the USB socket 203 of the personal computer 200. This is a flowchart for explaining a method of charging the secondary battery mounted on the portable terminal 90 using a DC power supply.

<Explanation of symbols for the main parts of the drawings>

90: portable terminal 92: connector socket

100: rectification unit 101: plug

102: power cable 103: EMI filter

104: first full-wave rectifying means 105: isolation transformer

106: second full wave rectifying means 107: filter

108: USB socket 109: charging current detection means

110: photo coupler 111: pulse width modulation controller

120: USB cable unit 121: USB terminal

122: USB cable 123: Output terminal

124: detection means for mounting the secondary battery 125: input voltage detection means

126: temperature detection means 127: malfunction prevention means

128: communication data detection means 129: secondary battery charge state detection means

130: constant current / constant voltage detection means 131: switching means

132: charging state display means 200: personal computer

203: USB socket

The present invention relates to a method for charging a secondary battery embedded in a terminal using a commercial AC power supply and a direct current (DC) power source of a personal computer. Particularly, the present invention relates to a USB socket or an AC power line of a personal computer. The rechargeable battery can be charged, connected to the USB socket of the personal computer, detects the communication data signal of the data communication line of the USB cable, sets the charging current, and charges the battery when the battery is not connected to the output terminal. And it relates to a charging method of a secondary battery built in a terminal using a commercial AC power supply and a DC power supply of a personal computer that can block the charging current.

BACKGROUND OF THE INVENTION As a charging device for a mobile phone which has been widely used in the past, it is disclosed in Japanese Patent Laid-Open No. 2000-201204 (published date; July 18, 2000).

The charging device for a mobile phone disclosed in Japanese Patent Laid-Open No. 2000-201204 discloses a charging method for a rechargeable battery built in a mobile phone, a digital camera, or a notebook computer (hereinafter referred to as an electronic product). The AC adapter 50 as shown in the figure was used.

The AC adapter 50 uses a plug 51 connected to an outlet 40 for supplying AC 100V or AC 220V and an AC 100V or AC 220V supplied by the power cable 52a via the plug 51. AC / DC converter 53 for stepping down to a constant level and stepping down to a DC voltage (for example, 5.0V) and the connector socket 46 of the cellular phone 45 connected to the end of the power cable 52b. It is composed of a connector plug 54 inserted into the.

The AC adapter 50 configured as described above has problems such as difficulty in miniaturization and weight reduction, and the AC adapter 50 is larger than the main body 45 of the cellular phone. Not only is there a problem such as inconvenience, there is a problem that can not be directly connected to the AC 100V or AC 220V power line to charge the secondary battery embedded in the electronic products using the AC 100V or AC 220V power.

In order to solve this problem, the U.S. data communication cable device disclosed in Korean Utility Model Publication No. 20-0284119 (published date: July 31, 2002) is a personal computer as shown in FIGS. 2 and 3. 70 or a USB connector 301 connected to a USB port of a notebook computer 80, an I / F connector 303 connected to a mobile phone (or mobile phone), and the I / F connector A cable unit 302 is connected between the unit 303 and the USB connector unit 301 and includes a communication line 302a and a charging line 302b.

In addition, the charging unit 304 of the I / F connector unit 303 may store the electrical energy of the computers 70 and 80 as electrical energy in the secondary battery of the mobile phone 60. A constant voltage-constant current control means 401 for changing the electrical energy of 80 into a power source suitable for the secondary battery used in the mobile phone 60, a manual charge control means 402 for manually controlling the charging action, Automatic charging control means 403 for automatically controlling the charging operation, and LED display means 404 for displaying the state of charge.

By the way, the UESB data communication cable device configured as described above exchanges data between the computer 70 and 80 and the mobile phone 60 by one cable by using the USB port of the computer 70 and 80, and also the mobile phone ( Since the secondary battery built in 60) can be charged, there is no need to carry a separate charging device or a power supply device, but the conventional USB data communication cable device converts AC power to DC power. Since there is no conversion means, there is a problem in that the secondary battery built in the mobile phone 60 cannot be charged by being electrically connected to an AC 100V or AC 220V power source directly.

Accordingly, the present invention has been made to solve the various problems described above, and an object of the present invention is to selectively connect to a USB socket or an AC power line of a personal computer to incorporate a secondary battery (lithium ion battery or lithium polymer battery) embedded in a terminal. The present invention provides a charging method of a secondary battery embedded in a terminal using a commercial AC power supply and a DC power supply of a personal computer capable of charging the battery.

Still another object of the present invention is a secondary built in a terminal using a commercial AC power supply and a DC power supply of a personal computer connected to a USB side socket of a personal computer to detect a signal of a data communication line of a USB cable and set a charging current. The present invention provides a charging method of a battery.

Still another object of the present invention is a terminal using a commercial AC power supply and a DC power supply of a personal computer capable of charging by reducing the charging current (FOLD BACK) to prevent overheating when charging a bad battery or an over-discharge battery. It is to provide a charging method of a secondary battery built in.

Still another object of the present invention is to provide a method of charging a secondary battery built in a terminal using a commercial AC power supply and a DC power supply of a personal computer that can cut off a charging voltage and a charging current when a battery is not connected to an output terminal. have.

The present invention provides a first connection step of electrically connecting the output terminal of the USB cable unit and the connector socket of the portable terminal by inserting the output terminal of the USB cable unit into the connector socket of the portable terminal to achieve the above object; A second connection step of electrically connecting the USB terminal of the USB cable unit to the USB socket of the rectification unit after the first connection step; and an outlet for supplying AC power to the plug of the rectification unit after the second connection step. The communication data detecting means detects whether or not the portable terminal and the personal computer perform data communication via the data communication line l1 of the USB cable after the AC power supply connecting step and the AC power supply connecting step. The data signal detection discrimination step for discriminating and determining the data signal; If the data signal is not detected in the data communication line l1 of the cable, it is determined by the secondary battery mounting detecting means whether the output terminal of the USB cable unit is inserted into the connector socket of the portable terminal and electrically connected thereto. When the USB cable unit and the portable terminal connection discrimination step and the USB cable unit and the portable terminal connection discrimination step are determined, when the USB cable unit and the portable terminal are connected, the commercial AC power supply is full-wave rectified and at a certain level. A low voltage drop and output to the USB socket 108 of the rectifying unit, and after the full wave rectifying step, whether the secondary battery is mounted on the output terminal of the USB cable unit by the secondary battery mounting detecting means. The secondary battery creation determination step of determining the secondary battery, and the determination result of the secondary battery creation determination step When mounted to the output terminal of the unit, the secondary battery mounting detection means receives a high level voltage signal to switch on the switching means, and after the first switching on step, the secondary battery charging In the first charge state determination step of determining the state of charge of the secondary battery by the state detection means, and the result of the determination of the first charge state determination step, if the secondary battery is not over discharge, the constant current in the secondary battery charge state detection means A first normal signal output step of outputting a normal signal indicating that the secondary battery is in a normal state to the constant voltage detection means, and after the first normal signal output step, input from a USB terminal of the USB cable unit by an input voltage detection means; When the first input voltage determination step of determining whether the voltage (4.5Vdc to 6.0Vdc) is normal and the determination result of the first input voltage determination step, the input voltage is normal, The first charging temperature determination step of determining whether the charging temperature of the secondary battery mounted on the portable terminal is normal by the figure detecting means 126 and the determination result of the first input voltage determination step, the input voltage is normal. In addition, as a result of the determination of the first charging temperature determination step, when the charging temperature of the secondary battery mounted in the portable terminal is normal, the DC power outputted to the USB socket of the rectifying unit is left at the USB terminal of the USB cable unit. An input power output step of outputting to the malfunction preventing means as a charging input power of a secondary battery; and after the input power output step, the input power is left in the switching means via the constant current / constant voltage detecting means in the malfunction preventing means. Outputting the charging current (g ') to the output terminal of the USB cable unit in the switching means 131 to the output terminal of the USB cable unit A first current mode charging step of rapidly charging the secondary battery of the portable terminal in a current charging mode; and after the first current mode charging step, a constant current output from the constant current / constant voltage detection means from the charge state display means, or A first current mode indicating that the secondary battery mounted in the portable terminal is being charged by receiving a rapid voltage and receiving a rapid charge current output from the switching means to emit a red light emitting diode of the charge state display means in red. A first full charge voltage discrimination step of determining by the secondary battery charge state detecting means whether the secondary battery mounted on the portable terminal is a full charge voltage after the charge display step and the first current mode charge display step; When the determination result of the first full charge voltage determination step is a full charge voltage, the secondary battery mounted on the portable terminal After the first voltage mode charging step of charging in the voltage mode and the first voltage mode charging step, the secondary battery charge state detecting means determines whether or not the charging current of the secondary battery mounted in the portable terminal is a full charge current. In the case of the first full charge current determination step determined by the first full charge current determination step and the first full charge current determination step, the full charge current is received by the constant current / constant voltage output from the constant current / constant voltage detection means and simultaneously output by the switching means. And a first full charge current display step of indicating that the secondary battery mounted on the portable terminal is a full charge current by emitting the dual light emitting diode of the charging state display means in green by receiving the charging current.

Hereinafter, a charging device for a secondary battery built in a terminal using a commercial AC power supply and a DC power supply of a personal computer according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view schematically showing a personal computer and AC power charging device according to an embodiment of the present invention, Figure 5 is a USB cable unit of a personal computer and AC power charging device according to an embodiment of the present invention Is a perspective view illustrating a state in which a DC power output from a personal computer is charged with a secondary battery mounted on a portable terminal, FIG. 6 is a block diagram of a rectifying unit in FIG. 4, and FIG. 7 is a USB cable unit in FIG. 4. 8 (a) is a DC input voltage graph, FIG. 8 (b) is a graph indicating whether a secondary battery is mounted on the portable terminal, and FIG. 8 (c) is mounted on the portable terminal. 8 is a graph showing the charging voltage of the secondary battery being charged, and FIG. 8 (d) is a graph showing the charging current according to the charging section.

As shown in FIGS. 4 to 8, the personal computer and the AC power charging device according to an embodiment of the present invention have a plug 101 connected to an AC power supply outlet (not shown) on one side. The rectifying unit 100 disposed at the other side and electrically connected to the USB socket 108 via the power cable 102 on the other side, and rectifying the AC power supply to the DC power supply having a specific level, and the rectifying unit 100 A USB terminal 121 that is electrically connected to the USB socket 108 and the USB socket 203 of the personal computer 200 is disposed, and is electrically connected to the USB socket 203 of the personal computer 200 to communicate with the data. Data communication is possible through (l1), and a USB cable 122 is interposed from the USB terminal 121 to charge a secondary battery built in a portable terminal 90 (for example, a mobile phone or a digital camera). Is excreted on the other side It consists of the USB cable unit 120, an output terminal 123 electrically connected to the connector socket 92 of the large-capacity device (90).

As shown in FIG. 6, the rectifying unit 100 filters the noise included in the AC power input through the plug 101, and the noise is filtered by the EMI filter 103. A first full-wave rectifying means 104 for receiving full-wave rectified AC power, an isolation transformer 105 for receiving a full-wave rectified AC power from the first full-wave rectifying means 104 and dropping it to a low voltage at a specific level; A second full-wave rectifying means 106 for receiving the DC voltage dropped to a low voltage of a specific level from the isolation transformer 105 and rectifying and smoothing the secondary voltage to a DC level of a specific level (for example, DC 5V); A filter 107 for filtering the noise included in the DC voltage secondary rectified and smoothed by the second full-wave rectifying means 106 to a specific level of DC voltage; and a filter of the specific level from which the noise is filtered by the filter 107. DC voltage to USB cable unit (120 USB socket 108 to be output to the USB terminal 121 of), charging current detection means 109 for detecting the charge current filtered by the filter 107, and the charging current detection means 109 The photo coupler 110 which insulates the charging current detected by the feedback current, and the charging current signal output from the photo coupler 110 receives the charging current signal and reduces the pulse width of the charging current when the over current exceeds a specific level. Receiving the charging current signal output from the 110 is a current of a specific level or less is composed of a pulse width modulation controller 111 to increase the pulse width of the charging current to output to the isolation transformer 105.

As illustrated in FIG. 7, the USB cable unit 120 has a data communication line l1 and a portable terminal 90 such that the personal computer 200 and the portable terminal 90 are electrically connected to enable data communication. USB cable 122 having a power supply line (L2) to charge the secondary battery built in, and is fixedly installed on the output side of the USB cable 122 and the connector socket 92 of the portable terminal 90 and An output terminal 123 electrically connected to the input terminal of the USB cable 122 and fixedly connected to the USB socket 108 of the rectifying unit 100 or the USB socket 203 of the personal computer 200. The USB terminal 121 connected to the terminal and the USB terminal 121 fixedly installed at the input side of the USB cable 122 are connected to the USB socket 203 of the personal computer 200 or the USB socket of the rectifying unit 100 ( 108 is electrically connected to the output terminal 123 and the The secondary battery mounting detecting means 124 for detecting whether the connector socket 92 of the terminal 90 for electrical connection is electrically connected to the output terminal 123 of the USB cable unit 120 and the portable terminal ( The DC power source introduced through the power supply line l2 of the USB cable 122 when the secondary battery mounting detecting means 124 detects that the connector socket 92 of the 90 is electrically connected. Input voltage detecting means 125 for detecting whether there is an abnormality, and temperature detecting means for detecting the temperature of the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the USB cable unit 120 ( 126 and 2 of the portable terminal 90 when the input power detected by the input voltage detecting means 125 is not abnormal and the temperature detected by the temperature detecting means 126 is not abnormal. Output charging power (current and voltage) to charge the battery At the same time, when there is an error in the input power detected by the input voltage detecting means 125, the first error signal output from the input voltage detecting means 125 or the temperature detected by the temperature detecting means 126. If there is an error, the output of the charging power source (current and voltage) is cut off to prevent the secondary battery mounted in the portable terminal 90 from receiving the second error signal output from the temperature detecting means 126. Communication data detection means for detecting whether the personal computer 200 and the portable terminal 90 are in data communication via the malfunction preventing means 127 and the data communication line l1 of the USB cable 122 And a secondary battery charge state detection unit 129 for detecting a state of charge charged in the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the USB cable unit 120; The secondary battery communication having Communication data detected by the data detection means 128 is in a state where data is communicated between the personal computer 200 and the portable terminal 90, and is charged with a USB mode charging current, and the personal computer 200 and the portable device are charged. When the terminal 90 is not in data communication, the output terminal 123 of the USB cable unit 120 is connected to the USB socket 108 of the rectifying unit 100 so that the USB is rapidly charged. Charges the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the cable unit 120, and the output terminal of the USB cable unit 120 by the secondary battery state of charge detection means (129) Constant current / constant voltage detecting means 130 for detecting a constant current / constant voltage for controlling to charge with a low current when the secondary battery of the portable terminal 90 mounted in the 123 is in an over discharge state, and the USB cable unit 120 Mounted on the output terminal 123 of Switching means 131 for controlling the output of the constant current or the constant voltage detected by the constant current / constant voltage detecting means 130 to charge the secondary battery of the portable terminal 90, and the charging current output from the malfunction preventing means 127 Alternatively, the terminal receives the charging voltage, receives the constant current or the constant voltage output from the constant current or the constant voltage detecting means 130, and receives the constant current or the constant voltage output from the switching means 131 to output the terminal of the USB cable unit 120. And a state of charge display means 132 for displaying the state of charge of the secondary battery of the portable terminal 90 mounted at 123.

Next, the operation and effect of the charging device of the secondary battery built in the terminal using a commercial AC power supply and a DC power supply of a personal computer according to an embodiment of the present invention configured as described above will be described.

First, the USB terminal 121 of the USB cable unit 120 is inserted into the USB socket 108 of the rectifying unit 100, and the plug 101 of the rectifying unit 100 is not shown in AC 100V or A method of charging the secondary battery mounted in the portable terminal 90 by connecting to AC 220V and rectifying the AC power will be described.

First, the output terminal 123 of the USB cable unit 120 is inserted into the connector socket 92 of the portable terminal 90 to output the output terminal 123 of the USB cable unit 120 and the portable terminal 90. After the connector socket 92 is electrically connected, the USB terminal 121 of the USB cable unit 120 is inserted into the USB socket 108 of the rectifying unit 100, and the plug of the rectifying unit 100 101) to an AC 100V or AC 220V outlet (not shown).

At this time, the noise contained in the AC power (AC100V or AC220V) input through the plug 101 of the rectifying unit 100 is filtered by the EMI filter 103, the noise is filtered by the EMI filter 103 The received AC power is received by the first full-wave rectifying means 104 and full-wave rectified and output to the isolation transformer 105.

The isolation transformer 105 receives a direct current rectified by the first full wave rectifying means 104 and drops first to a low voltage of a specific level, and a low level of the specific level first dropped from the isolation transformer 105. DC voltage is received by the second full-wave rectifying means 106, for example, rectified by a DC 5V voltage and smoothed, and rectified and smoothed by the second full-wave rectifying means 106 at a specific level of DC voltage. The noise included in the voltage is filtered by the filter 107.

The DC voltage of a specific level from which the noise is filtered by the filter 107 is applied from the USB socket 108 of the rectifying unit 100 to the USB terminal 121 of the USB cable unit 120.

In addition, the photocurrent coupler 110 detects the DC current (current flowing through the USB terminal 121 of the USB cable unit 120) of the specific level from which the noise is filtered by the filter 107 by the charging current detecting means 109. ) And the photo coupler 110 is switched on by the charging current output from the charging current detecting means 109 to provide insulation feedback to the pulse width modulation controller 111.

The pulse width modulation controller 111 receives the charging current signal output from the photo coupler 110 and reduces the pulse width of the charging current in the case of overcurrent above a certain level, and charge current signal output from the photo coupler 110. When the current is below a certain level, the pulse width of the charging current is increased to be output to the isolation transformer 105 to change the output time of the low voltage of the specific level which is first dropped by the isolation transformer 105. The size of the charging power output to the second rectifying means 106 (for example, 4.5Vdc to 6.0Vdc; see a in FIG. 8 (a)) to change the USB of the filter 107 and the rectifying unit 100. Output to the USB terminal 121 of the USB cable unit 120 through the socket 108.

At this time, the secondary battery mounting detecting means 124 detects whether the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are electrically connected. When the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are electrically connected (Fig. 8 (b) b (output terminal of the USB cable unit 120) If it is mounted to the portable terminal at 123, the high level voltage is detected, and if it is not mounted to the portable terminal at the output terminal 123 of the USB cable unit 120, the voltage of the low level is detected and is secondary. Can be determined whether the battery is installed or not).) The switching means 131 outputs a switching control signal from the secondary battery mounting detecting means 124 to the switching means 131 so that the switching means 131 is switched on. Keep it.

The communication data detecting means 128 detects whether or not the portable terminal 90 and the personal computer 200 perform data communication through the data communication line l1 of the USB cable 122. A state in which the 200 and the portable terminal 90 are not in data communication, that is, the USB terminal 121 of the USB cable unit 120 is electrically connected to the USB socket 203 of the personal computer 200. Since it is not in the state, the communication data detecting means 128 does not output an output signal indicating that data is being communicated to the constant current / constant voltage detecting means 130.

At the same time, the input voltage detecting means 125 and the malfunction preventing means 127 are connected to the input voltage detecting means 125 and the malfunction preventing means 127 through the USB socket 108 of the rectifying unit 100 (a in FIG. 8 (a), where a is Since 4.5Vdc to 6.0Vdc is applied, the input power source (4.5Vdc to 6.0Vdc) detected by the input voltage detecting means 125 is not abnormal and the portable unit detected by the temperature detecting means 126 is not abnormal. When the temperature of the secondary battery mounted on the terminal 90 is not abnormal, the malfunction prevention means 127 charges the secondary battery of the portable terminal 90 to a predetermined level of DC power, that is, the rectifying unit 100. The DC power for charging output from the USB socket 108 of the output as it is to the constant current / constant voltage detection means 130.

Accordingly, the USB terminal 121 of the USB cable unit 120 is connected to the USB socket 108 of the rectifying unit 100, so that the switching means 131 in the constant current / constant voltage detecting means 130 is connected. Since the fast charging current (see g of FIG. 8 (d)) is output to the secondary battery of the portable terminal 90 connected to the output terminal 123 of the USB cable unit 120. In Fig. 8 (c), c is a charging voltage charged in the secondary battery mounted on the portable terminal 90 with the charging current f in the low current charging section, and d is a rapid speed in the current mode charging section. Charging current (g) is the charging voltage charged in the secondary battery mounted on the portable terminal 90, d 'is the charging current (h) in the voltage mode charging section is mounted on the portable terminal 90 The charging voltage charged in the secondary battery, and e is the charging voltage charged in the secondary battery mounted on the portable terminal 90 by the charging current i in the voltage mode charging section.

The secondary battery charging state detecting unit 129 detects a state of charge charged in the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the USB cable unit 120. When the secondary battery mounted on the portable terminal 90 is defective or in an over-discharge state, the secondary battery mounted on the portable terminal 90 is charged with a fine current f in the low current charging section in FIG. 8 (d). After the charged voltage of the secondary battery mounted on the portable terminal 90 becomes 2.5Vdc, the battery is rapidly charged with the charging current (see g of FIG. 8 (d)) in the current mode charging section, and the portable terminal 90 When the charging voltage of the secondary battery mounted on the battery reaches 4.2Vdc, the battery is charged while gradually decreasing the charging current in voltage mode (see h of FIG. 8d), and after the point i of FIG. The point of time when 1/10 of the charging current (see g of FIG. 8 (d)) is reached is determined to be full charge. Accordingly, it is possible to prevent the secondary battery mounted on the portable terminal 90 from being overheated.

In the above description, the state of charge charged in the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the USB cable unit 120 is determined by the secondary battery state of charge detecting means 129. When the secondary battery mounted on the portable terminal 90 is not defective or in an over-discharge state, the battery is rapidly charged with a rapid charging current (see g of FIG. 8 (d)) in the current mode charging section of FIG. 8 (d). do.

As described above, when the secondary battery mounted on the portable terminal 90 is in a fully charged state, the constant current / constant voltage output from the constant current / constant voltage detecting means 130 is received and the charge output from the switching means 131 is received. The charging state display means 132, ie, the dual light emitting diode, emits green light in response to a current, indicating that the secondary battery mounted in the portable terminal 90 is in a fully charged state.

When the battery is not in a fully charged state, that is, when the secondary battery mounted in the portable terminal 90 is not in a fully charged state, the constant current / constant voltage output from the constant current / constant voltage detecting means 130 is received, and the In response to the charging current output from the switching means, the charging state display means 132, ie, the dual light emitting diode, emits red light, indicating that the secondary battery mounted in the portable terminal 90 is being charged.

On the other hand, when the input power detected by the input voltage detecting means 125 is abnormal, the input voltage detecting means 125 outputs a first error signal to the malfunction preventing means 127, and the temperature When the temperature of the secondary battery mounted on the portable terminal 90 detected by the detecting means 126 is abnormal (overheating), the temperature detecting means 126 passes from the malfunction preventing means 127. Since the second error signal is output, the first and second error signals are output from the malfunction preventing means 127 to the charge state display means 132 as an alarm signal, so that the charge state display means 132, i.e., dual The light emitting diode emits orange light to indicate that an input power source or the temperature of the secondary battery mounted in the portable terminal 90 is abnormal (overheating).

On the other hand, the secondary battery mounting detecting means 124 detects whether the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are electrically connected. When the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are not electrically connected, the switching means 131 in the secondary battery mounting detecting means 124. Since the switching control signal is not output to the control unit, the switching means 131 maintains the switching-off state to prevent occurrence of a safety accident such as a short circuit.

In the above description, when the input power detected by the input voltage detecting means 125 is abnormal, the input voltage detecting means 125 outputs a first error signal to the malfunction preventing means 127. When the temperature of the secondary battery mounted on the portable terminal 90 detected by the temperature detecting means 126 is abnormal (overheating), the temperature detecting means 126 performs the constant current / constant voltage detecting means. Since the second error signal is output to the 130, in order to prevent the occurrence of a safety accident, the malfunction preventing means 127 uses the constant current of the DC power for charging output from the USB socket 108 of the rectifying unit 100. / Does not output to the constant voltage detecting means 130.

Next, the DC power output from the USB socket 203 of the personal computer 200 is inserted by inserting the USB terminal 121 of the USB cable unit 120 into the USB socket 203 of the personal computer 200. The charging of the secondary battery mounted on the portable terminal 90 will be described.

The output terminal 123 of the USB cable unit 120 is inserted into the connector socket 92 of the portable terminal 90 to output the output terminal 123 of the USB cable unit 120 and the portable terminal 90. After the connector socket 92 is electrically connected, the USB terminal 121 of the USB cable unit 120 is inserted into the USB socket 203 of the personal computer 200 to connect the USB of the USB cable unit 120. The terminal 121 and the USB socket 203 of the personal computer 200 are electrically connected.

Next, when the main switch (not shown) of the personal computer 200 is switched on, the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are electrically connected. The output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are electrically connected by detecting whether the (B) b), the secondary battery mounting detecting means 124 outputs a switching control signal to the switching means 131 to switch the switching means 131 on, that is, to establish a conduction state. Keep it.

At this time, since the data communication is performed between the personal computer 200 and the portable terminal 90 via the data communication line l1 of the USB cable 122, the communication data detecting means 128 causes the data communication. The personal computer 200 and the portable terminal 90 detect whether or not the personal computer 200 and the portable terminal 90 are in data communication through the data communication line l1 of the USB cable 122. In the case of data communication, an output signal indicating that data communication is in progress is output to the constant current / constant voltage detecting means 130.

At the same time, the input voltage detecting means 125 and the malfunction preventing means 127 are connected to the input voltage detecting means 125 and the malfunction preventing means 127 through the power supply line ℓ2 of the USB cable 122 (a in FIG. Since 4.5Vdc to 6.0Vdc is applied, the input voltage (4.5Vdc to 6.0Vdc) detected by the input voltage detecting means 125 is not abnormal, and the temperature detected by the temperature detecting means 126 is When the temperature of the secondary battery mounted on the portable terminal 90 is not abnormal, the malfunction prevention means 127 charges the secondary battery of the portable terminal 90 at a predetermined level, that is, the personal computer 200. The DC power supply for charging outputted from the USB socket 203 is output to the constant current / constant voltage detecting means 130 as it is.

Accordingly, the USB terminal 121 of the USB cable unit 120 is connected to the USB socket 203 of the personal computer 200, so that the switching means 131 is used in the constant current / constant voltage detecting means 130. The portable terminal 90 connected to the output terminal 123 of the USB cable unit 120 is output since the USB mode charging voltage (see FIG. 8 (c)) and the charging current (see FIG. Charge the secondary battery.

The secondary battery charging state detecting unit 129 detects a state of charge charged in the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the USB cable unit 120. When the secondary battery mounted on the portable terminal 90 is defective or in an over-discharge state, the secondary battery mounted on the portable terminal 90 is charged with a fine current f in the low current charging section in FIG. 8 (d). After the charged voltage of the secondary battery mounted on the portable terminal 90 becomes 2.5Vdc, the battery is rapidly charged with a rapid charging current (see g ′ in FIG. 8 (d)) in the current mode charging section, and the portable terminal ( When the charging voltage of the secondary battery mounted at 90) reaches 4.2 Vdc, the battery is charged while gradually decreasing the charging current in voltage mode (see h in FIG. 8 d), and is charged after point i in FIG. 8 (d). Full charge is determined when the current reaches 1/10 of the constant current (see g 'in Fig. 8 (d)). Accordingly, it is possible to prevent the secondary battery mounted on the portable terminal 90 from being overheated.

In the above description, the state of charge charged in the secondary battery of the portable terminal 90 mounted on the output terminal 123 of the USB cable unit 120 is determined by the secondary battery state of charge detecting means 129. If the secondary battery mounted on the portable terminal 90 is not a defective or over-discharged state, it is rapidly detected by the rapid charging current (see g 'in FIG. 8 (d)) in the current mode charging section of FIG. To charge.

As described above, when the secondary battery mounted on the portable terminal 90 is in a fully charged state, the constant current / constant voltage output from the constant current / constant voltage detecting means 130 is received and the charge current output from the switching means is received. The charging state display means 132, that is, the dual light emitting diodes emit light green to indicate that the secondary battery mounted in the portable terminal 90 is in a fully charged state.

When the battery is not in a fully charged state, that is, when the secondary battery mounted in the portable terminal 90 is not in a fully charged state, the constant current / constant voltage output from the constant current / constant voltage detecting means 130 is received, and the In response to the charging current output from the switching means, the charging state display means 132, ie, the dual light emitting diode, emits red light, indicating that the secondary battery mounted in the portable terminal 90 is being charged.

On the other hand, when the input power detected by the input voltage detecting means 125 is abnormal, the input voltage detecting means 125 outputs a first error signal to the malfunction preventing means 127, and the temperature When the temperature of the secondary battery mounted on the portable terminal 90 detected by the detecting means 126 is abnormal, the temperature detecting means 126 sends a second error signal to the malfunction preventing means 127. Since the malfunction prevention means 127 outputs the first and second error signals to the charge state display means 132 as an alarm signal, the charge state display means 132, i.e., the dual light emitting diodes turn orange. It emits light to indicate that the temperature of the secondary battery mounted on the input power source or the portable terminal 90 is abnormal.

On the other hand, the secondary battery mounting detecting means 124 detects whether the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are electrically connected. When the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 90 are not electrically connected, the switching means 131 in the secondary battery mounting detecting means 124. Since the switching control signal is not output to the control unit, the switching means 131 maintains the switching-off state to prevent occurrence of a safety accident such as a short circuit.

In the above description, when the input power detected by the input voltage detecting means 125 is abnormal, the input voltage detecting means 125 outputs a first error signal to the malfunction preventing means 127. When the temperature of the secondary battery mounted on the portable terminal 90 detected by the temperature detecting means 126 is abnormal (overheating), the temperature detecting means 126 performs the constant current / constant voltage detecting means. Since the second error signal is output to the 130, in order to prevent the occurrence of a safety accident, the malfunction preventing means 127 uses the charging DC power output from the USB socket 203 of the personal computer 200 as the constant current. / Does not output to the constant voltage detecting means 130.

Next, a method of charging the secondary battery built in the terminal using the charging device of the secondary battery built in the terminal using the commercial AC power supply and the DC power supply of the personal computer will be described.

FIG. 9 is a flowchart illustrating a charging method for charging a secondary battery built in an electronic device using a personal computer and an AC power charging device according to an embodiment of the present invention, and FIG. 10 is an electric wave propagating AC power in FIG. 9. FIG. 11 is a flowchart illustrating a method of full-wave rectifying by the rectifying unit 100 to drop a voltage to a predetermined level. FIG. 11 is a diagram illustrating the USB cable unit 120 connected to the USB socket 203 of the personal computer 200 in FIG. This is a flowchart for explaining a method of charging the rechargeable battery mounted in the portable terminal 90 using the DC power output from the USB socket 203 of the personal computer 200 by inserting the USB terminal 121. . 9 to 11, S denotes a step.

First, the USB terminal 121 of the USB cable unit 120 is inserted into the USB socket 108 of the rectifying unit 100, and the plug 101 of the rectifying unit 100 is not shown in AC 100V or A method of charging the secondary battery mounted in the portable terminal 90 by connecting to AC 220V and rectifying the AC power will be described.

In step S1, the output terminal 123 of the USB cable unit 120 is inserted into the connector socket 92 of the portable terminal 90 to output the terminal 123 of the USB cable unit 120 and the portable terminal 90. Connector socket 92 is electrically connected (first connection step), the process proceeds to step S2, and the USB terminal 121 of the USB cable unit 120 is inserted into the USB socket 108 of the rectifying unit 100. Electrically connected (second connection step), the process proceeds to step S3 and the plug 101 of the rectifying unit 100 is connected to an AC power supply (AC 100V or AC 220V) supply outlet (not shown) (AC power supply connection step). ).

After the AC power connection step, the process proceeds to step S4 to detect whether the portable terminal 90 and the personal computer 200 perform data communication via the data communication line l1 of the USB cable 122. Is detected by the means 128 (data signal detection discrimination step), and when the data signal detection discrimination step is not detected, the data signal cannot be detected from the data communication line l1 of the USB cable 122. (NO), the process proceeds to step S5 and the output terminal 123 of the USB cable unit 120 is inserted into the connector socket 92 of the portable terminal 90 by the secondary battery mounting detecting means 124. (USB cable unit / portable terminal connection discrimination step), the determination result of the USB cable unit / portable terminal connection discrimination step, and the USB cable unit and the portable terminal (9 If 0) is connected (YES), the flow proceeds to step S100, where the AC power is rectified and the voltage is dropped to a predetermined level and output to the USB socket 108 of the rectifying unit 100 (full wave rectification). step).

Next, the flow advances to step S5 to determine whether or not the secondary battery is mounted on the output terminal 123 of the USB cable unit 120 by the secondary battery mounting detecting means 124 (secondary battery creation determining step). When the secondary battery is mounted on the output terminal 123 of the USB cable unit 120 (YES), the process proceeds to step S6 and the secondary battery mounting detecting means ( Receiving a high-level voltage signal at 124, the switching means 131 is switched on (first switching on step), and the flow proceeds to step S7 to determine whether the secondary battery is defective by the secondary battery charge state detecting means 129. Whether the battery is charged or not, that is, the state of charge of the secondary battery is determined (first charge state determination step), and if the result of the determination of the first charge state determination step is that the secondary battery is not over-discharged (NO), step S8 is performed. Further, the constant current / power failure in the secondary battery charge state detection means 129 Outputting a normal signal indicating that the secondary battery is in a normal state to the pressure detecting means 130 (first normal signal output step), and proceeds to step S9 by the input voltage detection means 125 of the USB of the USB cable unit 120 If it is determined whether the voltage (4.5Vdc to 6.0Vdc) input from the terminal 121 is normal (first input voltage determination step), and when the determination result of the first input voltage determination step is normal, the input voltage is normal (YES day) Case), the process proceeds to step S10 to determine whether the charging temperature of the secondary battery mounted on the portable terminal 90 is normal by the temperature detecting means 126 (first charging temperature determining step), and the first input. When the input voltage is normal (YES) and the determination result of the voltage determination step, and the determination result of the first charging temperature determination step, the charging temperature of the secondary battery mounted on the portable terminal 90 is normal (YES day) If) go to step S11 and the rectifying unit 100 The DC power output to the USB socket 108 is output as it is to the malfunction preventing means 127 at the USB terminal 121 of the USB cable unit 120 as the input power for charging the secondary battery (input power output step). ).

After the input power output step, the process proceeds to step S12 where the malfunction prevention means 127 outputs the input power as it is to the switching means 131 via the constant current / constant voltage detection means 130 and then at the switching means 131. The rapid charging current (see g (for example, charging current of 800 to 1000 mA) of FIG. 8 (d)) is output to the output terminal 123 of the USB cable unit 120 to output the USB cable unit 120. The secondary battery of the portable terminal 90 connected to the terminal 123 is rapidly charged in the current charging mode (charging current (g; charged with a current of 1000 mA or less, for example) in FIG. 8) (first current mode charging). Step), after the charging step of the first current mode, the process proceeds to step S13 and receives the constant current or the constant voltage output from the constant current / constant voltage detecting means 130 from the charge state display means 132, and the switching means 131 Receives the fast charging current output from the Represents a group that emits light with dual light emitting diode of the charge status indicator means 132 in red land the second leg mounted to the portable terminal 90 is charged (first current charging mode display step).

After the first current mode charge display step, the flow advances to step S14 to determine by the secondary battery charge state detecting means 129 whether the secondary battery mounted on the portable terminal 90 is the full charge voltage (first). When the full charge voltage determination step), the determination result of the first full charge voltage determination step, if the full charge voltage (YES), go to step S15 to charge the secondary battery mounted on the portable terminal 90 in the voltage mode ( The first voltage mode charging step), the process proceeds to step S16 to determine by the secondary battery charge state detecting means 129 whether or not the charging current of the secondary battery mounted in the portable terminal 90 is a full charge current; The first full charge current determination step) and the first full charge current determination step, in the case of the full charge current (YES), go to step S17 to determine the constant current or the constant voltage output from the constant current / constant voltage detection means 130; Reception and dong Upon receiving the charging current output from the switching means 131, the dual light emitting diode (not shown) of the charging state display means 132 emits light in green to fully charge the secondary battery mounted in the portable terminal 90. Indicates current.

In the above description, the voltage mode charging is performed by the microcurrent gradually decreasing with an exponential function in FIG. 8 (d) (the charging current h in which the charging current gradually decreases in FIG. 8 (d) and Charging with the charging current (i).

On the other hand, when the secondary battery is not determined to be mounted on the output terminal 123 of the USB cable unit 120 (NO), the secondary battery of the step S5 is determined. Returning to the attachment determination step, the secondary battery deposition determination step of step S5 is repeatedly performed, and as a result of the determination of the first input voltage determination step of step S9, the input voltage detecting means 125 causes the USB cable unit 120 to be replaced. If the input voltage input from the USB terminal 121 is not normal (NO; if the input voltage is not 4.5Vdc to 6.0Vdc), go to step S9a and the secondary battery mounted in the portable terminal 90 After the first error signal (signal indicating that the input voltage is not normal) is output from the input voltage detecting means 125 to the malfunction preventing means 127 so as to prevent charging, the first input voltage determination step of step S9 is performed. Return to before the first input of the step S9 Discrimination step The following operations are repeated, and in the first charge temperature determination step of step S10, it is determined by the temperature detecting means 126 whether the charging temperature of the secondary battery mounted on the portable terminal 90 is normal. If it is not normal (NO), go to step S10a and the second error signal (charging temperature is normal) in the temperature detecting means 126 to prevent charging of the secondary battery mounted in the portable terminal 90 Signal) is returned to the malfunction preventing means 127, and then the process returns to the first charge temperature determination step of step S10, and the operations below the first charge temperature determination step of step S10 are repeatedly performed.

As a result of the determination of the first full charge voltage determination step of step S14, when the secondary battery mounted on the portable terminal 90 is not the full charge voltage (NO), the process returns to the first current mode charging step of step S12. The secondary battery of the portable terminal 90 connected to the output terminal 123 of the USB cable unit 120 is rapidly charged in the current charging mode.

As a result of the determination of the first full charge current determination step of step S16, when the charging current for charging the secondary battery mounted in the portable terminal 90 is not the full charge current (NO), the first voltage of step S15 Returning to the mode charging step, the secondary battery mounted in the portable terminal 90 is charged in the voltage mode.

As shown in FIG. 10, the full wave rectifying step of step S100 filters the noise included in the AC power source (AC100V or AC220V) input through the plug 101 of the rectifying unit 100 in the EMI filter 103. (First noise filtering step; step S101), and after the first noise filtering step, the process proceeds to step S102, where AC power filtered by the EMI filter 103 is received by the first full-wave rectifying means 104, and then propagates first. While rectifying and smoothing (first full-wave rectifying step), the flow proceeds to step S103 to receive the direct-current rectified direct current power supply from the isolation transformer 105 in the first full-wave rectifying step, and firstly drops to a low voltage of a certain level (voltage Dropping step), the process proceeds to step S104 where the second DC rectifying means 106 receives a low level DC voltage of a specific level first lowered by the isolation transformer 105, , Smoothing The second full-wave rectification step, proceeds to step S105, and receives the DC 5V voltage full-wave rectified in the second full-wave rectification step by the filter 107 to filter noise included in the DC 5V voltage (second noise filtering step). ).

Subsequently, the process proceeds to step S106, where the second noise filtering DC voltage is applied to the USB terminal 121 of the USB cable unit 120 in the second noise filtering step. The secondary battery mounted on the portable terminal 90 is charged by the DC current flowing through the battery 121 (secondary battery charging step), and the flow proceeds to step S107 by direct current flowing through the USB terminal 121 of the USB cable unit 120. The current is detected by the charging current detecting means 109 (charging current detecting step) and output to the photocoupler 110.

Next, the process proceeds to step S108 where the photocoupler 110 is switched on / off by the charging current detected by the charging current detecting means 109 in the charging current detecting step, thereby charging the charging current to the pulse width controller 111. Insulation feedback (insulation feedback step), and the flow proceeds to step S109 to output the output of the first-line full-wave rectified output from the first rectifying means 104 in the isolation transformer 105 in accordance with the magnitude of the charging current. Variable and output to the second rectifying means 106 (charge current variable output step), and after the charging current variable output step, the process proceeds to step S110 where the pulse width output from the second rectifying means 106 is variable. After receiving the current from the filter 107 to filter the noise flows through the USB terminal 121 of the USB cable unit 120 by varying the charging current of the secondary battery mounted on the portable terminal 90 Charge (charge current variable charging step).

As a result of the determination of the first charge state determination step of step S7, when the secondary battery mounted on the portable terminal 90 is defective or over discharged by the secondary battery charge state detection means 129 (YES). In step S20, the constant current / constant voltage detection unit 130 outputs an alarm signal to the state of charge display unit 132 to emit light of the dual light emitting diodes of the state of charge display unit 132 in orange to the portable terminal 90. Indicates that the secondary battery mounted on the battery is defective or over-discharged (over-discharge display step), and the process proceeds to step S21 where the secondary battery mounted on the portable terminal 90 is fixed with the fine current f of FIG. Charge for a period of time (fine current charging step), and proceeds to step S22 to determine whether the secondary battery charge state detection means 129 whether the charge voltage of the secondary battery mounted on the portable terminal 90 has reached a certain level. of When it is determined (first secondary battery charge level determination step), the determination result of the first secondary battery charge level determination step, when the charging voltage of the secondary battery mounted on the portable terminal 90 reaches a predetermined level (YES) The process returns to the first normal signal output step of step S8 and repeats the operations below the first normal signal output step.

When a data signal is detected in the data signal detection discrimination step of step S4 (YES), a description will be given with reference to FIG.

First, in step S30, the personal computer 200 and the portable terminal 90 communicate data via the data communication line l1 to the constant current / constant voltage detecting means 130 in the communication data detecting means 128. Outputting a signal indicating that the data is output (data signal output step), and then, after the data signal output step, the USB terminal 121 of the USB cable unit 120 is connected to the USB socket 203 of the personal computer 200. (USB cable unit / personal computer connection discrimination step), and as a result of the determination of the USB cable unit / personal computer connection discrimination step, the USB terminal 121 of the USB cable unit 120 is determined. Is electrically connected to the USB socket 203 of the personal computer 200 (YES), the flow proceeds to step S32 where the output terminal 123 of the USB cable unit 120 is connected to the portable terminal. Whether the battery is electrically connected to the connector socket 92 of the device 92, that is, the secondary battery mounted on the portable terminal 92 is electrically connected to the output terminal 123 of the USB cable unit 120. (Step of determining whether to connect the USB cable unit or the portable terminal), and as a result of the discrimination of the step of determining the connection between the USB cable unit and the portable terminal, the output terminal 123 and the portable terminal 92 of the USB cable unit 120 are determined. If the connector socket 92 is electrically connected (YES), the flow advances to step S33 to switch on the switching means 131 (second switching on step).

After the second switching on step, the flow advances to step S34 to determine whether the secondary battery is defective or overdischarged by the secondary battery charge state detecting means 129, that is, to determine the state of charge of the secondary battery (second charge state determination). Step), if the result of the determination of the second charge state determination step, the secondary battery is not over discharge (NO), go to step S35 and the constant current / constant voltage detection means 130 in the secondary battery charge state detection means 129 Outputs a normal signal indicating that the secondary battery is in a normal state (second normal signal output step), and proceeds to step S37 after the second normal signal output step, and inputs the personal computer 200 by the input voltage detecting means 125. It is determined whether the voltage (4.5Vdc to 6.0Vdc) input from the USB socket 203 to the USB terminal 121 of the USB cable unit 120 is normal (second input voltage determination step), and the second input. As a result of discrimination in the voltage discrimination step, the input voltage If normal (YES), the flow proceeds to step S38 to determine whether the charging temperature of the secondary battery mounted on the portable terminal 90 is normal by the temperature detecting means 126 (second charging temperature determining step). When the determination result of the second input voltage determination step is the input voltage is normal (YES), and the determination result of the second charging temperature determination step, the charging temperature of the secondary battery mounted on the portable terminal 90 is If normal (YES), go to step S39 and malfunction (4.5Vdc to 6.0Vdc) input from the USB socket 203 of the personal computer 200 to the USB terminal 121 of the USB cable unit 120 as it is. The prevention means 127 outputs to the charging input power of the secondary battery (second input power output step).

After the second input power output step, the process proceeds to step S40 where the malfunction preventing means 127 outputs the input power to the switching means 131 as it is via the constant current / constant voltage detecting means 130 and the switching means 131. ), A charging current (see g '(for example, charging current of 300 to 500 mA) of FIG. 8 (d)) is outputted to the output terminal 123 of the USB cable unit 120 to provide the USB cable unit 120. Charge the secondary battery of the portable terminal 90 connected to the output terminal 123 in the current charging mode (second current mode charging step), and after the second current mode charging step, proceeds to step S41 and the charging The state display means 132 receives the constant current or the constant voltage output from the constant current / constant voltage detection means 130 and at the same time, the charging current (charge current g '; for example, 300 to 300) output from the switching means 131. 500 mA)) of the charge state display means 132 Indicates a land a second leg attached to the light-emitting diode to red light in the portable terminal 90 that is charged (second current charging mode display step).

After the second current mode charge display step, the flow advances to step S42 to determine whether the secondary battery mounted on the portable terminal 90 is the full charge voltage by the secondary battery charge state detecting means 129 (second full charge). Full voltage discrimination step), and when the second full charge voltage discrimination step is determined as the result of the full charge voltage (YES), the process proceeds to step S43 to charge the secondary battery mounted in the portable terminal 90 in the voltage mode (the 2 voltage-mode charging step), the flow advances to step S16 to determine whether the secondary battery charge state detecting means 129 determines whether the secondary battery mounted on the portable terminal 90 is a full charge current; 2) the full charge current determination step) and the second full charge current determination step, if the full charge current (YES), go to step S45 to receive the constant current or the constant voltage output from the constant current / constant voltage detection means 130; And At the same time, by receiving the charging current output from the switching means 131, the dual light emitting diode (not shown) of the charging state display means 132 emits green light so that the secondary battery mounted on the portable terminal 90 is fully charged with current. (Second full charge current display step).

On the other hand, as a result of the determination of the USB cable unit / personal computer connection discrimination step in step S31, the USB terminal 121 of the USB cable unit 120 is not electrically connected to the USB socket 203 of the personal computer 200. If not (NO), the USB cable unit / personal computer connection discrimination step in step S31 is repeatedly performed, and as a result of the determination of the USB cable unit and portable terminal connection discrimination step in step S32, the USB cable unit 120 Is not electrically connected to the connector socket 92 of the portable terminal 92 (NO), the flow returns to the step of determining the connection between the USB cable unit and the portable terminal in step S32. The following operations are repeatedly performed in the above USB cable unit portable terminal connection discrimination step.

As a result of the determination in the second charge state determination step of step S34, when the secondary battery mounted on the portable terminal 90 is defective or over discharged by the secondary battery charge state detection means 129 (YES). In step S50, the constant current / constant voltage detection unit 130 outputs an alarm signal to the state of charge display unit 132 to emit the orange light of the dual state light emitting diode of the state of charge display unit 132 in the portable terminal 90. Indicates that the secondary battery mounted on the battery is defective or over-discharged (second over-discharge display step), and proceeds to step S51 to display the secondary battery mounted on the portable terminal 90 with the fine current f of FIG. Charge the battery for a predetermined time (fine current charging step), and proceeds to step S52 to determine whether or not the charge voltage of the secondary battery mounted on the portable terminal 90 reaches a predetermined level. ) And the charging voltage of the secondary battery mounted on the portable terminal 90 has reached a predetermined level. If (YES), the operation returns to the second normal signal output step of step S35 to repeat the operations below the second normal signal output step.

If the input voltage input from the USB terminal 121 of the USB cable unit 120 by the input voltage detecting means 125 is not normal (NO in the determination result of the second input voltage determining step in step S37) (NO When the input voltage is not 4.5Vdc to 6.0Vdc) Go to step S37a to prevent the malfunction prevention means from the input voltage detecting means 125 to prevent charging of the secondary battery mounted in the portable terminal 90. 127), after outputting the first error signal (signal indicating that the input voltage is not normal), the process returns to the second input voltage discrimination step of step S37 and repeatedly performs the operations below the second input voltage discrimination step of step S37. In the second charging temperature determining step of step S38, the temperature detecting means 126 determines whether the charging temperature of the secondary battery mounted on the portable terminal 90 is normal, and if it is not normal (NO). ), Go to step S38a After outputting a second error signal (signal indicating that the charging temperature is not normal) from the temperature detecting means 126 to the malfunction preventing means 127 to prevent charging of the secondary battery mounted in the portable terminal 90. The flow returns to the first charge temperature determination step of step S38, and the operations below the second charge temperature determination step of step S38 are repeatedly performed.

As a result of the determination of the second full charge voltage determination step of step S42, when the secondary battery mounted on the portable terminal 90 is not the full charge voltage (NO), the second current mode charging step of step S40 returns. The secondary battery of the portable terminal 90 connected to the output terminal 123 of the USB cable unit 120 is charged in the current charging mode.

As a result of the determination of the second full charge current determination step of step S44, when the charging current for charging the secondary battery mounted on the portable terminal 90 is not the full charge current (NO), the second voltage of step S43 Returning to the mode charging step, the secondary battery mounted in the portable terminal 90 is charged in the voltage mode.

Therefore, the charging method of a secondary battery built in a terminal using a commercial AC power supply and a DC power supply of a personal computer according to the present invention is selectively connected to a USB socket or an AC power line of a personal computer so that the secondary battery (lithium) is embedded in the terminal. Ion battery or lithium polymer battery) can be charged and connected to the USB socket of a personal computer to sense the signal of the data communication line of the USB cable to set the charging current, and when charging a bad battery or an over-discharge battery In order to prevent overheating, the charging current can be reduced (FOLD BACK charging), and the charging voltage and the charging current can be cut off when the battery is not connected to the output terminal.

In the above description, although illustrated and described with reference to specific embodiments, the present invention is not limited thereto, for example, by those skilled in the art without departing from the concept of the present invention. Of course, the design can be changed in various ways.

As described above, according to the charging method of a secondary battery built in a terminal using a commercial AC power supply and a DC power supply of a personal computer, the terminal may be selectively connected to a USB socket or an AC power line of the personal computer. It can charge a rechargeable battery (lithium ion battery or lithium polymer battery), connect to the USB socket of a personal computer, detect the signal of the data communication line of the USB cable, and set the charging current. In order to prevent overheating during charging, the charging current can be reduced (FOLD BACK charging), and the charging voltage and the charging current can be cut off when the battery is not connected to the output terminal.

Claims (10)

The output terminal 123 of the USB cable unit 120 is inserted into the connector socket 92 of the portable terminal 90 to output the terminal 123 of the USB cable unit 120 and the connector socket of the portable terminal 90. A first connection step of electrically connecting the 92; A second connection step of electrically connecting the USB terminal 121 of the USB cable unit 120 to the USB socket 108 of the rectifying unit 100 after the first connection step; An AC power connecting step of connecting the plug 101 of the rectifying unit 100 to an AC power supply outlet after the second connecting step; and after the AC power connecting step, the portable terminal 90 and the personal computer 200 A data signal detection discrimination step of detecting and discriminating by the communication data detecting means 128 whether or not to perform data communication through the data communication line l1 of the USB cable 122; When the data signal is not detected in the data communication line l1 of the USB cable 122 as a result of the discrimination of the data signal detection discrimination step, the USB cable unit 120 is detected by the secondary battery mounting detecting means 124. A USB cable unit / portable terminal connection discrimination step of judging whether or not the output terminal 123 is inserted into the connector socket 92 of the portable terminal 90 and electrically connected thereto; As a result of the discrimination of the USB cable unit / portable terminal connection discrimination step, when the USB cable unit 120 and the portable terminal 90 are connected, the commercial AC power is rectified and the voltage drops to a predetermined level to rectify the rectification. Full wave rectification step of outputting to the USB socket 108 of the unit 100,  A secondary battery creation determining step of determining whether the secondary battery is mounted on the output terminal 123 of the USB cable unit 120 by the secondary battery mounting detecting means 124 after the full wave rectifying step; When the secondary battery is mounted on the output terminal 123 of the USB cable unit 120, the secondary battery mounting detecting unit 124 receives a high level voltage signal. A first switching on step of switching on the switching means 131, A first charge state determination step of determining a state of charge of the secondary battery by the secondary battery charge state detection means 129 after the first switching on step; As a result of the determination of the first charge state determination step, when the secondary battery is not over discharged, the secondary battery charge state detection unit 129 sends a normal signal indicating that the secondary battery is in a normal state to the constant current / constant voltage detection unit 130. Outputting a first normal signal; After the first normal signal output step, the input voltage detecting means 125 for determining whether or not the voltage (4.5Vdc to 6.0Vdc) input from the USB terminal 121 of the USB cable unit 120 is normal 1 input voltage determination step, As a result of the determination of the first input voltage determination step, when the input voltage is normal, the first charging for determining whether the charging temperature of the secondary battery mounted on the portable terminal 90 is normal by the temperature detecting means 126. Temperature determination step, The rectifying unit when the determination result of the first input voltage determination step is normal, and the determination result of the first charging temperature determination step, the charging temperature of the secondary battery mounted on the portable terminal 90 is normal Input to output the DC power output to the USB socket 108 of the 100 as it is as the input power for charging the secondary battery to the malfunction preventing means 127 in the USB terminal 121 in the USB cable unit 120 as it is Power output stage, After the input power output step, the malfunction preventing means 127 outputs the input power as it is through the constant current / constant voltage detecting means 130 to the switching means 131 as it is. ') Is output to the output terminal 123 of the USB cable unit 120 and the secondary battery of the portable terminal 90 connected to the output terminal 123 of the USB cable unit 120 in the current charging mode. A first current mode charging step of fast charging, After the first current mode charging step, the charging state display means 132 receives a constant current or a constant voltage output from the constant current / constant voltage detection means 130, and at the same time, the rapid charging current output from the switching means 131 A first current mode charge display step of displaying the secondary battery mounted in the portable terminal 90 by charging the dual light emitting diode of the charge state display means 132 in red; A first full charge voltage judging step of determining by the secondary battery charge state detecting means 129 whether the secondary battery mounted on the portable terminal 90 is a full charge voltage after the first current mode charge display step; , A first voltage mode charging step of charging the secondary battery mounted on the portable terminal 90 in a voltage mode when the determination result of the first full charge voltage determination step is a full charge voltage; After the first voltage mode charging step, the secondary battery charge state detecting unit 129 determines whether the secondary battery mounted on the portable terminal 90 is a full charge current. Current discrimination step, In the case of the full charge current, as a result of the determination of the first full charge current determination step, the constant current / constant voltage output from the constant current / constant voltage detecting means 130 is received and the charge current output from the switching means 131 is received. And a first full charge current display step of indicating that the secondary battery mounted on the portable terminal 90 is a full charge current by emitting the green light emitting diode of the charge state display means 132 in green. A method of charging a secondary battery built in a terminal using an AC power source and a DC power source of a personal computer. The method of claim 1, wherein the full wave rectifying step comprises: a first noise filtering step of filtering noise included in an AC power input through the plug 101 of the rectifying unit 100 by the EMI filter 103; A first full wave rectifying step of receiving AC power filtered by noise in the EMI filter 103 from the first full wave rectifying means 104 after the first noise filtering step, and simultaneously smoothing the first full wave rectifying means; A voltage drop step of receiving a full-wave rectified direct current power supply from the isolation transformer 105 and first dropping the voltage to a low voltage of a specific level; The second full-wave rectification which receives the low DC voltage of the specific level first lowered by the isolation transformer 105 by the second full-wave rectifying means 106 and rectifies it to a low direct-current voltage (DC 5V voltage) and smoothes it. Steps, A second noise filtering step of receiving the low DC voltage full-wave rectified in the second full-wave rectifying step from the filter 107 and filtering the noise included in the DC voltage; By applying the second noise-filtered DC voltage in the second noise filtering step to the USB terminal 121 of the USB cable unit 120 to the DC current flowing through the USB terminal 121 of the USB cable unit 120. A secondary battery charging step of charging a secondary battery mounted on the portable terminal 90; A charging current detecting step of detecting a DC current flowing through the USB terminal 121 of the USB cable unit 120 by the charging current detecting unit 109 and outputting the detected current to the photocoupler 110; Insulation feedback for insulated feedback of the charging current to the pulse width controller 111 while the photocoupler 110 is switched on / off by the charging current detected by the charging current detecting means 109 in the charging current detecting step. Steps, After the insulation feedback step, the output of the primary full-wave rectified DC power output from the first rectifying means 104 in the isolation transformer 105 is varied according to the magnitude of the charging current to the second rectifying means 106. Variable output charging current output stage, After the charging current variable output step, after receiving the charging current with the variable pulse width output from the second rectifying means 106 by the filter 107 to filter the noise after the USB terminal 121 of the USB cable unit 120 ) Is built in the terminal using a commercial AC power supply and DC power supply of a personal computer, characterized in that the charging current variable charging step of charging while varying the charging current of the secondary battery mounted on the portable terminal 90 by flowing through) Charging method of secondary battery. The method according to claim 1, wherein when the secondary battery mounted on the portable terminal 90 is defective or over discharged by the secondary battery state of charge detecting means 129, the constant current is determined. / Secondary voltage mounted on the portable terminal 90 by outputting an alarm signal to the charge state display means 132 from the constant voltage detection means 130 to emit light of the dual light emitting diode of the charge state display means 132 in orange Indicates that the battery is defective or over-discharged, the secondary battery mounted on the portable terminal 90 is charged for a predetermined time with a fine current f, and the charging voltage of the secondary battery mounted on the portable terminal 90 is The secondary battery charge state detecting unit 129 determines whether a predetermined level is reached, and when the charging voltage of the secondary battery mounted in the portable terminal 90 reaches a predetermined level, the first battery is charged. A first stationary signal the second charging method of the rechargeable battery built-in is performed by repeating the operation of the output stage than in a terminal using a commercial AC power source and the DC power supply of the personal computer, characterized by returning to the signal output stage. The method of claim 1, wherein when the input power detected by the input voltage detecting means 125 is abnormal, the input voltage detecting means 125 outputs a first error signal to the malfunction preventing means 127. When the temperature of the secondary battery mounted on the portable terminal 90 detected by the temperature detecting means 126 is abnormal (overheating), the temperature detecting means 126 prevents the malfunction prevention means ( The second error signal is output to the 127, and the malfunction preventing means 127 outputs the first and second error signals as an alarm signal to the charge state displaying means 132 as the charge state display means 132. The dual light-emitting diode of the light emitting orange to commercial power supply and DC power supply, characterized in that the input power or the secondary battery mounted on the portable terminal 90 is abnormal (overheating) To this Method of charging a secondary battery incorporated in the terminal. 2. The personal computer 200 and the portable terminal according to claim 1, wherein when the data signal is detected in the data signal detection discrimination step, the communication data detecting means 128 connects the constant current / constant voltage detecting means 130 to the personal computer 200 and the portable terminal. A data signal output step of outputting a signal indicating that 90 is performing data communication via the data communication line l1; After the data signal output step, the USB cable unit and the personal computer connection discriminant for determining whether the USB terminal 121 of the USB cable unit 120 is electrically connected to the USB socket 203 of the personal computer 200. Steps, As a result of the determination of the USB cable unit / personal computer connection discrimination step, when the USB terminal 121 of the USB cable unit 120 is electrically connected to the USB socket 203 of the personal computer 200, the USB Whether the output terminal 123 of the cable unit 120 is electrically connected to the connector socket 92 of the portable terminal 92, that is, the secondary battery mounted on the portable terminal 92 is the USB cable unit ( A USB cable unit / portable terminal connection discrimination step of determining whether or not it is electrically connected to the output terminal 123 of 120; When the output terminal 123 of the USB cable unit 120 and the connector socket 92 of the portable terminal 92 are electrically connected as a result of the discrimination in the step of determining the connection between the USB cable unit and the portable terminal, the switching is performed. A second switching on step of switching on the means 131, A second charge state determination step of determining whether the secondary battery is defective or overdischarged by the secondary battery charge state detection means 129, that is, the state of charge of the secondary battery after the second switching on step; As a result of the determination of the second charge state determination step, when the secondary battery is not over discharged, the secondary battery charge state detection unit 129 sends a normal signal indicating that the secondary battery is in a normal state to the constant current / constant voltage detection unit 130. Outputting a second normal signal; The voltage inputted from the USB socket 203 of the personal computer 200 to the USB terminal 121 of the USB cable unit 120 by the input voltage detecting means 125 after the second normal signal output step (4.5Vdc to The second input voltage determination step of determining whether or not 6.0 Vdc) is normal, and the determination result of the second input voltage determination step indicates that the input terminal is normal, the portable terminal 90 by the temperature detecting means 126. A second charging temperature determining step of determining whether the charging temperature of the secondary battery mounted on the battery is normal; When the input voltage is normal and the determination result of the second charging temperature determination step, the charging temperature of the secondary battery mounted on the portable terminal 90 is normal, the personal computer ( The voltage (4.5 Vdc to 6.0 Vdc) input from the USB socket 203 of the 200 to the USB terminal 121 of the USB cable unit 120 is used as the input power for charging the secondary battery to the malfunction preventing means 127 as it is. Outputting a second input power output step; After the second input power output step, the malfunction prevention means 127 outputs the input power to the switching means 131 as it is via the constant current / constant voltage detecting means 130, thereby charging current in the switching means 131. (The current of 300 to 500mA or less) is output to the output terminal 123 of the USB cable unit 120 to the secondary of the portable terminal 90 connected to the output terminal 123 of the USB cable unit 120 A second current mode charging step of charging the battery in the current charging mode; After the second current mode charging step, the charging state display means 132 receives the constant current or constant voltage output from the constant current / constant voltage detecting means 130 and at the same time, the charging current output from the switching means 131 ( g ') a second current mode charge display step of displaying the secondary battery mounted in the portable terminal 90 by charging the dual light emitting diode of the charge state display means 132 in red; A second full charge voltage judging step of determining by the secondary battery charge state detecting means 129 whether the secondary battery mounted on the portable terminal 90 is a full charge voltage after the second current mode charge display step; , A second voltage mode charging step of charging a secondary battery mounted in the portable terminal 90 in a voltage mode when the determination result of the second full charge voltage determination step is a full charge voltage; After the second voltage mode charging step, the secondary full charge state detecting means 129 determines whether the secondary battery mounted on the portable terminal 90 is a full charge current. Current discrimination step, In the case of the full charge current, as a result of the determination of the second full charge current determination step, the constant current / constant voltage output from the constant current / constant voltage detecting means 130 is received and the charge current output from the switching means 131 is received. And a second full charge current display step of indicating that the secondary battery mounted on the portable terminal 90 is a full charge current by emitting a green light emitting diode (not shown) of the charging state display means 132 in green. A method of charging a secondary battery embedded in a terminal using a commercial AC power supply and a DC power supply of a personal computer. The method according to claim 5, wherein when the secondary battery mounted on the portable terminal 90 is defective or over discharged by the secondary battery charged state detecting means 129, the constant current is determined. / Secondary voltage mounted on the portable terminal 90 by outputting an alarm signal to the charge state display means 132 from the constant voltage detection means 130 to emit light of the dual light emitting diode of the charge state display means 132 in orange Indicates that the battery is defective or over-discharged, the secondary battery mounted on the portable terminal 90 is charged for a predetermined time with a fine current f, and the charging voltage of the secondary battery mounted on the portable terminal 90 is The secondary battery charge state detecting unit 129 determines whether a predetermined level is reached, and when the charging voltage of the secondary battery mounted on the portable terminal 90 reaches a predetermined level, the second battery is charged. Returns to the signal output stage and the second stationary signal the second charging method of the battery incorporated in the terminal using the commercial AC power and the DC power supply of the personal computer according to claim for performing repeatedly the operation of the output stage below. According to claim 5, As a result of the determination of the second input voltage determination step, the voltage (4.5Vdc to 6.0Vdc) input from the USB terminal 121 of the USB cable unit 120 by the input voltage detection means 125 If this is not normal, the first error signal (the input voltage is normal) from the input voltage detecting means 125 to the malfunction preventing means 127 to prevent charging of the secondary battery mounted in the portable terminal 90. 2) built in the terminal using a commercial AC power supply and a DC power supply of a personal computer, characterized in that the method returns to the second input voltage discrimination step and repeats the second input voltage discrimination step. How to charge the battery. The method of claim 5, wherein in the second charging temperature determining step, when the charging temperature of the secondary battery mounted on the portable terminal 90 is normal by the temperature detecting means 126, it is not normal. After outputting a second error signal (signal indicating that the charging temperature is not normal) from the temperature detecting means 126 to the malfunction preventing means 127 to prevent charging of the secondary battery mounted in the portable terminal 90. And returning to the second charging temperature determination step and repeatedly performing the second charging temperature determination step. The USB cable of claim 5, wherein when the secondary battery mounted on the portable terminal 90 is not the full charge voltage, the second current mode charging step returns to the second current mode charging step. The secondary battery of the portable terminal 90 connected to the output terminal 123 of the unit 120 is rapidly charged in the current charging mode, which is incorporated in a terminal using a commercial AC power supply and a DC power supply of a personal computer. Charging method of secondary battery. The charging method of claim 5, wherein when the charging current for charging the secondary battery mounted on the portable terminal 90 is not the full charging current, the second voltage mode charging step is performed. A method of charging a secondary battery embedded in a terminal using a commercial AC power supply and a DC power supply of a personal computer, which is characterized by returning and charging the secondary battery mounted in the portable terminal 90 in a voltage mode.

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