• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. TECHNICAL FIELD OF THE INVENTION The present invention relates to an AC / DC combined charging device. 2. The problem to be solved by the invention The present invention charges a rechargeable battery used as a power source for a mobile phone, etc., and can be used for both a DC power source and an AC power source to charge the rechargeable battery, thereby significantly reducing the cost of purchase. The purpose is to provide. 3. Summary of Solution to Invention The present invention provides an AC voltage input means for inputting an AC voltage; AC / DC conversion means for converting an AC voltage applied through the AC voltage input means into a DC voltage; DC / DC conversion means for converting the DC voltage converted by the AC / DC conversion means into a size suitable for the rechargeable battery; And charging means for charging the rechargeable battery by receiving a DC voltage from the DC / DC conversion means and converting the applied DC voltage into a size suitable for the rechargeable battery. 4. Important uses of the invention The present invention is used to charge a rechargeable battery used in mobile phones and the like.
    公开号:KR19990029388A
    申请号:KR1019980035598
    申请日:1998-08-31
    公开日:1999-04-26
    发明作者:노명기
    申请人:노명기；
    IPC主号:
    专利说明:

    AC / DC combined charging device
    BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an AC / DC combined charging device for charging a rechargeable battery used in a mobile phone. In particular, the present invention relates to charging by receiving alternating current (AC) power or direct current (DC) power. The present invention relates to a charging device capable of charging a battery.
    In recent years, due to the high development of electronic technology, small electronic devices such as mobile phones use a rechargeable battery as a power source.
    Such a conventional charging device for charging a rechargeable battery includes an AC charging device for receiving AC power and charging a rechargeable battery, and a DC charging device for charging a rechargeable battery by receiving DC power. Used separately.
    1 is a configuration diagram of a conventional AC charging device, and includes an AC / DC converter 106 and a DC / DC converter 107.
    The operation of the conventional AC charging device having the structure as described above is as follows.
    When an AC voltage of about 220 V is applied from the AC power source, the AC / DC converter 106 converts the applied AC voltage into a DC voltage, and applies the DC voltage to the DC / DC converter 107.
    In this way, since the DC voltage converted into the AC / DC converter 106 is too high to be directly applied to the rechargeable battery, the DC / DC converter 107 converts the DC voltage to a DC voltage of a size suitable for the rechargeable battery. Convert it and apply it to the rechargeable battery.
    Through this process, the DC voltage output from the conventional AC charging device charges the rechargeable battery.
    2 is a configuration diagram of a conventional direct current charging device, and includes a DC / DC converter 210.
    A process of charging a rechargeable battery by a conventional direct current charging device having such a structure is as follows.
    Since the rechargeable battery is charged by the DC voltage, the conventional DC charging device does not undergo the process of converting the AC voltage into the DC voltage as in the conventional AC charging device of FIG. 1.
    Therefore, the conventional DC charging device converts the DC voltage applied from the DC power supply through the DC / DC converter 210 to a size suitable for the rechargeable battery, and then applies the converted DC voltage to convert the rechargeable battery. Will be charged.
    However, in the case of the conventional charging devices as described above, the charging device for use in the AC power source and the charging device for use in the DC power source must be purchased separately and used, so that the cost of purchasing the charging device is high, and also charging Every time the battery is charged, there is a troublesome problem of checking whether the power is DC or AC each time.
    Accordingly, the present invention has been made to solve the above problems, in charging a rechargeable battery used as a power source for a small electronic device such as a mobile phone, and can be used for both DC and AC power It is an object of the present invention to provide a charging device that can significantly reduce the cost at the time of purchase by enabling to charge the battery.
    1 is a configuration diagram of a conventional AC charging device.
    2 is a configuration diagram of a conventional direct current charging device.
    3 is a detailed circuit diagram of an AC / DC combined charging device according to the present invention.
    Explanation of symbols for the main parts of the drawings
    110: AC voltage input unit 120: AC / DC converter
    130: DC / DC converter 140: charging unit
    150: reverse current prevention unit
    In order to achieve the above object, the present invention provides a DC / AC combined charging device for charging a rechargeable battery by receiving a DC power source or an AC power source. Voltage input means; AC / DC conversion means for converting an AC voltage applied through the AC voltage input means into a DC voltage; DC / DC conversion means for converting the DC voltage converted by the AC / DC conversion means into a size suitable for the rechargeable battery; And charging the rechargeable battery by receiving a DC voltage from the DC / DC conversion means, and converting the DC voltage applied from the DC power source into a DC voltage having a size suitable for the rechargeable battery. It includes a charging means for.
    In addition, the present invention provides a reverse current prevention means for preventing the current applied from the DC power supply to flow into the DC / DC conversion means, and to prevent a reverse current from flowing from the charging means to the DC / DC conversion means. It includes more.
    Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIG. 3.
    3 is a detailed circuit diagram of an AC / DC combined charging device according to the present invention.
    As shown in FIG. 3, the AC / DC combined charging device of the present invention includes an AC voltage input unit 110 for inputting and transferring an AC voltage applied through the AC power connection unit 101, and an AC voltage input unit 110. AC / DC converter 120 for converting the AC voltage applied from the DC voltage and DC / DC conversion for converting the DC voltage converted by the AC / DC converter 120 to a size suitable for a rechargeable battery. The unit 130 and the DC / DC converter 130 are supplied with a DC voltage to charge the rechargeable battery connected to the battery connection unit 102, and the DC voltage applied through the DC power connection unit 103 is charged. It is provided with a charging unit 140 for converting to a size suitable for the battery to charge the rechargeable battery connected to the battery connection (102).
    In addition, the charging device of the present invention prevents the DC current applied through the DC power supply connecting unit 103 from leaking while flowing to the charging unit 140 and flowing to the DC / DC conversion unit 130, and from the charging unit 140. In addition, the reverse current prevention unit 150 implemented as a diode (D151) to prevent the reverse current flow to the DC / DC converter 130 is further provided.
    The AC voltage input unit 110 receives an AC voltage from the overcurrent prevention unit 111 and the overcurrent protection unit 111 to prevent the overcurrent from flowing through the AC power connection unit 101, and suddenly causes thunder and lightning. The lightning protection unit 112 protects the charging device and other electronic devices connected thereto by blocking the generated lightning (high voltage), and receives an AC voltage from the lightning protection unit 112 and filters the noise generated therein to filter the AC. Filtering unit 113 so as not to flow into the electric wire flowing voltage and charging voltage removing unit 114 for removing the voltage charged in the capacitor (C114) when separating the AC power from the AC power connection 101 Equipped.
    The overcurrent protection unit 111 is formed of a fuse F111 connected to the AC power connection unit 101.
    The lightning block 112 is implemented as a varistor B112, which is a junction diode connected between the fuse F111 and the AC power connection 101.
    The filtering unit 113 includes a capacitor C114 connected in parallel with the varistor B112, and one end of the inductors L113 and L114 connected in parallel between the capacitor C114 and the AC / DC converter 120. .
    The charging voltage removing unit 114 includes a resistor R114 and a capacitor C114 connected in parallel between the inductors L113 and L114 and the varistor B112.
    The AC / DC converter 120 is connected to an AC / DC converter 121 and an AC / DC converter 121 for converting an AC voltage applied from the AC voltage input unit 110 into a DC voltage, An overcurrent prevention unit 122 is provided to prevent an overcurrent from flowing during the initial inflow.
    The AC / DC converter 121 includes a rectifier circuit composed of diodes D121 to D124 and a capacitor C121 connected between an anode of the diodes D123 and D124 and an input terminal of the DC / DC converter 130. Is implemented.
    The overcurrent protection unit 122 includes a thermistor TH122 connected between the cathodes of the diodes D121 and D122 and the capacitor C121.
    The DC / DC converter 130 converts the magnitude of the DC voltage applied from the AC / DC converter 120 to a size suitable for the rechargeable battery connected to the battery connection unit 102. And an output feedback unit 132 for outputting and feedbacking a DC voltage output from the transformer 131 and an AC / DC converter 120 according to the magnitude of the output voltage returned from the output feedback unit 133. And a switching unit 133 for switching the DC voltage thus converted into the transformer 131 and a feedback voltage transmitting unit 134 for feeding back the voltage output from the output feedback unit 133 to the switching unit 133.
    The transformer 131 may include primary coils L131 and L132 connected to an output terminal of the AC / DC converter 120 and an output terminal of the switching unit 133, and a secondary coil L133 connected to the output feedback unit 133. ), A diode C131 connected to the secondary coil L133 and an anode connected to the input terminal of the output feedback unit 133, and a capacitor C131 connected to the cathode of the secondary coil L133 and the diode D131. ).
    The output feedback unit 132 includes a capacitor C132 connected between the output terminal of the switching unit 133 and ground, and an optocoupler PH132 that insulates the output voltage of the switching unit 133 according to the output voltage of the transformer 131. ), A resistor R132 connected between the output terminal of the transformer 131 and the input terminal of the optocoupler PH132, the inductor L134 connected between the output terminal of the transformer 131 and the anode of the diode D151, and the inductor ( L134) and the constant voltage monitoring for returning the output voltage of the transformer 131 to the switching unit 133 by monitoring the capacitor C133 connected between the input terminal of the delay unit 134 and the output terminal of the transformer 131. Element VK132, resistor R131 connected between reset terminal R and inductor L134 of constant voltage monitoring element VK132, output terminal of transformer 131 and capacitor C133 and constant voltage monitoring element A resistor R132 connected between the reset terminal R of the VK132 and a reset terminal of the constant voltage monitoring element VK132. A capacitor C134 is connected between the ruler R and the input terminal K.
    The switching unit 133 has a power terminal VCC receiving power, a ground terminal GND connected to ground, a drain terminal D for outputting power, and an output terminal FB connected to the optocoupler PH132. The switching element SW133, the resistor R133 connected between the power supply terminal VCC of the switching element SW133 and the output terminal of the AC / DC converter 120, the input terminal of the transformer 131, and the switching element SW133. A diode D133 and a resistor R134 connected in series between the drain terminal D of the capacitor, a capacitor C134 connected in parallel with the resistor R134, an output terminal of the delay unit 134, and a power terminal of the switching element SW133. A coil L132, a resistor R135, and a diode D133 connected in series between the VCCs, and a capacitor C135 connected in parallel with the coil L132 are provided.
    Here, the switching element SW133 actively adjusts the magnitude of the DC voltage output from the AC / DC converter 120 according to the magnitude of the output voltage fed back from the output feedback unit 132 to the transformer 131. Switch at high speed.
    The delay unit 134 includes capacitors C136 and 137 connected in series between the output terminal of the output feedback unit 132 and the input terminal of the switching unit 133.
    The charging unit 140 adjusts and transmits the DC voltage output from the DC / DC converter 130, and converts the DC voltage input through the DC power connection unit 103 to the rechargeable battery connected to the battery connection unit 102. A DC voltage converter 141 for converting to a magnitude, a constant voltage controller 142 for controlling an output voltage so that an overvoltage is not applied from the DC voltage converter 141 to the rechargeable battery connected to the battery connection 102, and DC Constant current controller 143 for controlling the output current from the voltage converter 141 to the rechargeable battery connected to the battery connection 102, the output of the DC voltage converter 141 and the constant current controller 143 An output voltage display control unit 144 for receiving a voltage and controlling a display device (not shown) connected to the display device connection unit 104 is provided.
    The display device is detachable from the display device connection part 104 and includes a plurality of light emitting diodes. In addition, the output voltage display control unit 144 selectively emits the plurality of light emitting diodes according to the magnitude of the voltage output from the DC voltage converter 141, thereby allowing a user to apply a direct current voltage to the rechargeable battery from the charging device. Make sure you know the size of.
    The DC voltage converter 141 adjusts the magnitude of the DC voltage applied through the DC power connector 103 and adjusts the magnitude of the DC voltage output from the DC / DC converter 130 ( RG141 and a resistor having a function of limiting a current applied through the DC voltage input unit 103 and limiting a current input from the DC / DC converter 130 in order to prevent an overcurrent from flowing during an output short circuit. R141, the capacitor C141 connected between the resistor R141 and the ground, the resistor R142 connected to the terminals SC and DC of the voltage regulator RG141, and the terminal TC of the voltage regulator RG141. A capacitor C142 connected between the ground and ground, a bipolar transistor TR141 having a base connected to the resistor and a collector connected to the resistor R141, and a resistor R143 connected between the base and the resistor R141 of the bipolar transistor TR141. ) And bipolar transistors ( A diode D141 connected between the emitter of TR141 and ground, an inductor L141 connected between the emitter and the output terminal of the bipolar transistor TR141, and a capacitor C142 connected between the inductor L141 and ground. do.
    The constant voltage controller 142 may include a resistor R144 and R145 connected in series between the battery BT and ground, a diode D142 having a cathode connected to the resistors R144 and R145 and connected to the output terminal, and a diode D142. A resistor R146 is connected between the cathode of D142 and the ground.
    The constant current controller 143 includes a resistor R147 connected to the output terminal of the DC voltage converter 141, an operational amplifier OP143 having a non-inverting input terminal + connected to the resistor R147, and a resistor R147. Diodes D143 connected in parallel between the resistors R148 and R149 connected between the inverting input terminals (-) of the amplifier OP143 and a cathode connected to the output terminal of the constant voltage controller 142 and the output terminal CII of the voltage regulator RG141. ), A bipolar transistor TR143 and a base connected to the output terminal of the operational amplifier OP143, a collector connected to the resistors R148 and 149, and an emitter connected to the anode of the diode D143, and a bipolar transistor ( Resistor R150 connected between the emitter of TR143 and ground.
    The output voltage display controller 144 includes a resistor R151 connected to the output terminal of the DC voltage converter 141, a resistor R152 connected to the resistor R147 of the constant current controller 142, and an inverting input terminal (−). An operational amplifier OP144 connected to a resistor R151 and a non-inverting input terminal (+) connected to a resistor R152, and resistors R153 and R154 connected in series between the non-inverting input terminal (+) of the operational amplifier OP144 and ground. ), A resistor R155 connected between the inverting input terminal (−) of the operational amplifier OP144 and ground, a resistor R156 connected to the output terminal of the operational amplifier OP144, and a base are connected to the resistor R156. The emitter is connected to the display device connection 104 of the bipolar transistor TR144, the resistors R157, R158, R159 connected in series between the collector of the bipolar transistor TR144 and ground, and the bipolar transistor TR144 A resistor (R160) commonly connected to the collector and the resistor (R157) and a resistor connected in parallel to the resistor (R157) R161, a bipolar transistor TR145 whose base is connected to the resistor R160, and the collector is connected to the resistor R161, and a resistor R162 connected between the emitter of the bipolar transistor TR144 and the display device connection 104. And a resistor R163 connected between the emitter of the bipolar transistor TR145 and the display device connecting portion 104.
    Meanwhile, the charging unit 140 may include a diode D144 connected between the input terminal of the DC voltage converter 141 and a ground, and a diode D145 connected between the resistor R147 of the constant current controller 143 and the battery connection unit 102. And a resistor R164 and a diode D146 connected in parallel between the cathode of the diode D145 and ground.
    The operation of the AC / DC combined charging device of the present invention having the structure as described above will be described in detail as follows.
    First, an operation of charging the rechargeable battery by receiving an AC voltage will be described.
    When the user connects the AC power source to the AC power source connection unit 101 to charge the rechargeable battery connected to the battery connection unit 102, the AC voltage input unit 110 exchanges the AC voltage applied through the AC power source connection unit 101. Output to the DC converter 120.
    In this case, the process of receiving and outputting the AC voltage by the AC voltage input unit 110 will be described in detail.
    The current applied from the AC power supply connection unit 101 flows through the fuse F111 of the overcurrent protection unit 111. If the overcurrent is applied from the AC power supply connection unit 101, the fuse F111 is automatically delivered and disconnected. The flow is blocked to protect the charging device.
    As such, the AC voltage applied through the overcurrent protection unit 111 is transmitted to the AC / DC converter 120 through the lightning blocking unit 112, the filtering unit 113, and the charging voltage removing unit 114. Here, when the lightning strike unit 112 suddenly generates lightning (high voltage) due to thunder and lightning and flows into the charging device, the lightning blocking unit 112 prevents the damage of the charging device and other electronic devices connected thereto.
    The filtering unit 113 filters and removes the noise so that the noise generated inside the charging device does not flow into the wire through which the AC voltage flows.
    On the other hand, when the AC power connected to the AC power supply connection unit 101 is disconnected, the voltage is charged in the capacitor C114 so that the AC voltage also flows in the AC power connection unit 101, so that the user flows in the AC power connection unit 101. It may be possible to be damaged by AC voltage. Therefore, the charging voltage removing unit 114 removes the voltage charged in the capacitor C144 when the AC power is disconnected to prevent the AC voltage from flowing through the AC power connection unit 101.
    Subsequently, the AC / DC converter 120 converts an AC voltage applied from the AC voltage input unit 110 into a DC voltage and outputs the DC voltage to the DC / DC converter 130. Here, the overcurrent protection unit 122 of the AC / DC converter 120 functions to prevent overcurrent that may be generated by components such as capacitors when the power is initially introduced.
    When the AC voltage is converted into the DC voltage through the above process and applied to the DC / DC converter 130, the DC voltage converted by the AC / DC converter 120 is applied to the DC voltage required by the rechargeable battery. Since it is too high, the DC / DC converter 130 converts the DC voltage applied from the AC / DC converter 120 into a DC voltage of a size required by the rechargeable battery connected to the battery connection 102. Output to the charging unit 140.
    At this time, the DC / DC converter 130 will be described in detail the process of adjusting the magnitude of the DC voltage.
    The transformer 131 adjusts the DC voltage applied from the AC / DC converter 120 to reduce the size to a size suitable for a rechargeable battery. Here, the transformer 131 is insulated from the high voltage of the primary coil L131 and the low voltage of the secondary coil L133, but some parasitic voltage is generated so that the high voltage of the primary coil L131 having a high impedance is secondary. It goes to the coil (L133). As such, if the high voltage passed to the secondary coil L133 is left as it is, the user may be damaged, and the feedback voltage transmitting unit 134 transfers the high voltage transferred to the secondary coil L133 by the parasitic voltage to the switching unit 133. Allow feedback.
    Since the square wave generated by the switching element SW133 outputs the voltage in a form in which the input and output are insulated from each other using the transformer 131, the optocoupler PH132 of the output feedback unit 132 monitors the magnitude of the voltage. In order to feedback the output voltage to the switching element SW133 in an insulated state together with the device VK132, a signal is transmitted to the switching element SW133 in the form of insulated light. Here, the constant voltage monitoring element VK132 is an element for monitoring and controlling whether the low voltage of the secondary coil L133 of the transformer 131 is maintained at a constant voltage, and monitors the constant voltage state of the secondary coil L133. By the feedback voltage transfer unit 134 is transferred to the switching element (SW133).
    In this way, the DC voltage applied to the charging unit 140 is adjusted to a size suitable for the rechargeable battery by the charging unit 140, and then charges the rechargeable battery connected to the battery connection unit 102.
    In this case, the process of charging the rechargeable battery by the charging unit 140 will be described in detail in the operation description of the charging unit 140 which will be described later.
    Next, an operation of charging a rechargeable battery by receiving a DC voltage will be described.
    When the user connects the DC power supply to the DC power supply connecting unit 103 to charge the rechargeable battery connected to the battery connecting unit 102, the charging unit 140 receives the DC voltage applied through the DC power supply connecting unit 103. After adjusting to a size suitable for, the rechargeable battery connected to the battery connection 102 is charged.
    In this case, the charging unit 140 receives a DC voltage and outputs a rechargeable battery.
    When a DC voltage is applied from the DC power supply connecting unit 103 or the DC / DC converter 130, the DC voltage converting unit 141 uses the voltage regulator RG141 to match the DC voltage applied to the rechargeable battery. The charging batter connected to the battery connection unit 102 is charged by adjusting to.
    In addition, since an overcurrent may occur during an output short circuit, the DC voltage converter 141 may limit the input current through the input current limiting resistor R141 to prevent an overcurrent from occurring during an output short circuit.
    At this time, the constant voltage controller 142 feedbacks the voltage output from the output terminal CII of the voltage regulator RG141 of the DC voltage converter 141 to maintain the voltage output to the battery connection unit 102 at a constant level. . Similarly, the constant current controller 142 also feedbacks the voltage output from the output terminal CII of the voltage regulator RG141 of the DC voltage converter 141 to maintain a constant voltage output to the battery connection unit 102. .
    The constant voltage and constant current control functions overload the rechargeable battery, thereby preventing the rechargeable battery connected to the battery connection unit 102 from being damaged.
    The output voltage display control unit 144 selectively emits light emitting diodes of the display device connected to the display device connecting unit 104 according to the magnitude of the voltage output from the charging unit 140, thereby allowing the user to charge the charging unit 140. ) To know the magnitude of the DC voltage applied to the rechargeable battery.
    Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.
    As described above, the present invention can be used for both a DC power source and an AC power source to charge a rechargeable battery, thereby significantly reducing the cost of purchase compared to the conventional method, and also used for charging a rechargeable battery. The convenience of not having to check whether the power supply is alternating current or direct current is provided every time. In particular, the size of the product can be made smaller and lighter by reducing the size of the transformer by using a fast switching method when controlling the DC voltage by the DC / DC converter. There is a very good effect to increase.
    权利要求:
    Claims (8)
    [1" claim-type="Currently amended] In the DC / AC charging device for charging a rechargeable battery by applying a DC power or AC power,
    AC voltage input means for inputting and transferring an AC voltage applied from the AC power source;
    AC / DC conversion means for converting an AC voltage applied through the AC voltage input means into a DC voltage;
    DC / DC conversion means for converting the DC voltage converted by the AC / DC conversion means into a size suitable for the rechargeable battery; And
    Charging means for charging the rechargeable battery by receiving a DC voltage from the DC / DC conversion means and converting the DC voltage applied from the DC power supply to a size suitable for the rechargeable battery;
    AC / DC combined charging device comprising a.
    [2" claim-type="Currently amended] The method of claim 1,
    The AC voltage input means,
    Overcurrent prevention means for preventing overcurrent from flowing from the AC power supply;
    A lightning blocking means connected to the overcurrent preventing means to block a lightning (high voltage) that is suddenly generated from the outside;
    Filtering means connected to the lightning blocking means and filtering noise generated therein so as not to flow into an electric wire through which an AC voltage flows; And
    Charge voltage removing means connected to the filtering means and the lightning protection means to remove the voltage charged therein when disconnecting the AC power.
    AC / DC combined charging device comprising a.
    [3" claim-type="Currently amended] The method of claim 1,
    The AC / DC conversion means,
    An AC / DC converter for converting an AC voltage applied from the AC voltage input means into a DC voltage; And
    Connected to the AC / DC converter, the over-current prevention means for preventing the over-current flows during the initial inflow of power
    AC / DC combined charging device comprising a.
    [4" claim-type="Currently amended] The method of claim 1,
    The DC / DC conversion means,
    DC voltage adjusting means for reducing the DC voltage applied from the AC / DC conversion means to a size suitable for the rechargeable battery;
    An output feedback means for outputting and feeding back the DC voltage controlled by the DC voltage adjusting means;
    Switching means for switching the DC voltage applied from the AC / DC conversion means to the DC voltage adjusting means according to the magnitude of the output voltage fed back from the output feedback means; And
    Feedback voltage transfer means for feeding back the voltage output from the output feedback means to the switching means.
    AC / DC combined charging device comprising a.
    [5" claim-type="Currently amended] The method of claim 4, wherein
    The switching means,
    A high speed switching element for actively controlling the magnitude of the DC voltage output from the AC / DC conversion means and switching at high speed according to the magnitude of the output voltage fed back from the output feedback means.
    AC / DC combined charging device comprising a.
    [6" claim-type="Currently amended] The method of claim 1,
    The charging means,
    DC voltage conversion means for controlling and transmitting the DC voltage output from the DC / DC conversion means, and converts the DC voltage applied from the DC power supply to a size suitable for the rechargeable battery;
    Constant voltage control means for controlling an output voltage so that an overvoltage is not applied from said DC voltage conversion means to said rechargeable battery;
    Constant current control means for controlling an output current so that an overcurrent is not applied from said DC voltage converting means to said rechargeable battery; And
    Output voltage display control means for controlling an external display means for receiving the output voltage of the DC voltage converting means and the constant current control means to display the magnitude of the DC voltage applied to the rechargeable battery
    AC / DC combined charging device comprising a.
    [7" claim-type="Currently amended] The method of claim 6,
    The DC voltage conversion means,
    Input current limiting means for limiting the current applied from the DC power supply and limiting the current input from the DC / DC conversion means in order to prevent an overcurrent from flowing during an output short circuit.
    AC / DC combined charging device comprising a.
    [8" claim-type="Currently amended] The method according to any one of claims 1 to 7,
    Reverse current prevention means for preventing the current applied from the DC power supply to flow into the DC / DC conversion means and preventing a reverse current from flowing from the charging means to the DC / DC conversion means.
    AC / DC combined charging device further comprising.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-08-31|Application filed by 노명기
    1998-08-31|Priority to KR1019980035598A
    1999-04-26|Publication of KR19990029388A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019980035598A|KR19990029388A|1998-08-31|1998-08-31|AC / DC combined charging device|
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