WO2009066908A2 - Appareils de charge/décharge portables - Google Patents

Appareils de charge/décharge portables Download PDF

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Publication number
WO2009066908A2
WO2009066908A2 PCT/KR2008/006744 KR2008006744W WO2009066908A2 WO 2009066908 A2 WO2009066908 A2 WO 2009066908A2 KR 2008006744 W KR2008006744 W KR 2008006744W WO 2009066908 A2 WO2009066908 A2 WO 2009066908A2
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
charge
discharge
control signal
battery
Prior art date
Application number
PCT/KR2008/006744
Other languages
English (en)
Other versions
WO2009066908A3 (fr
Inventor
Hee Ju Park
Original Assignee
Dani Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020070119386A external-priority patent/KR100990664B1/ko
Priority claimed from KR1020070119387A external-priority patent/KR100973325B1/ko
Application filed by Dani Co., Ltd. filed Critical Dani Co., Ltd.
Publication of WO2009066908A2 publication Critical patent/WO2009066908A2/fr
Publication of WO2009066908A3 publication Critical patent/WO2009066908A3/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging

Definitions

  • the present invention relates to a portable charge/discharge apparatus, and more particularly, to a portable charge/discharge apparatus which is able to indicate its charged state when the portable charge/discharge apparatus is charged and indicate its discharged state when the portable charge/discharge apparatus is discharged, to be prevented from being destroyed by a reverse current flowing from an external apparatus, to prevent improper execution of charge state indication by connecting the portable charge/discharge apparatus with the external apparatus, to charge either the external apparatus or a portable battery charge/discharge apparatus, and to control the magnitude of an output voltage of the portable charge/discharge apparatus.
  • FIG. 1 is a schematic block diagram of a conventional portable charge/discharge apparatus 1.
  • the conventional portable charge/discharge apparatus 1 is connected to an external charger via an input unit (or an input port) 10, for example, a TTA 24 pin, and thus receives an external power voltage via the external charger, charges a battery unit 30 with the external power voltage, and supplies the charged power voltage to an external apparatus (for example, a mobile phone, a personal digital assistant (PDA), or the like) connected to an output unit (or an output port) 20, for example, a TTA 24 pin.
  • PDA personal digital assistant
  • the portable charge/discharge apparatus 1 As illustrated in FIG. 1, the portable charge/discharge apparatus 1 further includes a switch circuit (for example, an light emitting diode (LED) control unit 41) and an LED 42, thereby adding an illumination function to existing functions of the portable charge/discharge apparatus 1.
  • a switch circuit for example, an light emitting diode (LED) control unit 41
  • LED 42 an LED 42
  • the conventional portable charge/ discharge apparatus 1 supplies a reserve power supply voltage corresponding to a precharged voltage of the main power supply source to the electronic apparatus.
  • the conventional portable charge/discharge apparatus 1 is used as an auxiliary power supply device of the electronic apparatus by using a secondary battery (for example, a lithium ion (Li-ion) battery).
  • a secondary battery for example, a lithium ion (Li-ion) battery.
  • the conventional portable charge/ discharge apparatus 1 supplies emergency power to an external apparatus, when the power of an internal battery of the external apparatus is exhausted and the external apparatus is unable to be charged by a charger.
  • the conventional portable charge/discharge apparatus 1 is unable to know how much its own power is left. Disclosure of Invention Technical Problem
  • the present invention provides a portable charge/discharge apparatus which is able to indicate its charged state when the portable charge/discharge apparatus is charged and indicate its discharged state when the portable charge/discharge apparatus is discharged.
  • the present invention also provides a portable charge/discharge apparatus which can be prevented from being destroyed by a reverse current flowing from an external apparatus, can prevent improper execution of charge state indication by connecting the portable charge/discharge apparatus with the external apparatus, can charge either the external apparatus or a portable battery charge/discharge apparatus, and can control the magnitude of an output voltage of the portable charge/discharge apparatus.
  • a portable charge/discharge apparatus can indicate its charged state when the portable charge/discharge apparatus is charged and indicate its discharged state when the portable charge/discharge apparatus is discharged.
  • the portable charge/discharge apparatus can be prevented from being destroyed by a reverse current flowing from an external apparatus.
  • the portable charge/discharge apparatus can prevent improper execution of charge state indication by connecting the portable charge/discharge apparatus with the external apparatus, can charge either the external apparatus or a portable battery charge/discharge apparatus, and can control the magnitude of an output voltage of the portable charge/discharge apparatus.
  • FIG. 1 is a schematic block diagram of a conventional portable charge/discharge apparatus
  • FIG. 2 illustrates a portable charge/discharge apparatus according to an embodiment of the present invention
  • FIG. 3 illustrates a portable charge/discharge apparatus according to another embodiment of the present invention
  • FIG. 4 illustrates a portable charge/discharge apparatus according to another embodiment of the present invention
  • FIG. 5 illustrates a portable charge/discharge apparatus according to another embodiment of the present invention.
  • FIGS. 6 and 7 illustrate a portable charge/discharge apparatus according to another embodiment of the present invention. Best Mode for Carrying out the Invention
  • a portable charge/ discharge apparatus including an input port and an output port, the portable charge/ discharge apparatus including a battery unit; a display unit which displays either a charge operation or a discharge operation of the battery unit; and a detection circuit which, during the charge operation of the battery unit, detects a charge voltage of the battery unit and turns on the display unit if the detected charge voltage is greater than or equal to a first reference voltage and turns off the display unit if the detected charge voltage is greater than a second reference voltage, and during the discharge operation of the battery unit, detects a discharge voltage of the battery unit and turns on the display unit if the detected discharge voltage is equal to and smaller than the second reference voltage and turns off the display unit if the detected discharge voltage is smaller than the first reference voltage, wherein the second reference voltage is greater than the first reference voltage.
  • the detection circuit includes a first control circuit which, during the charge operation of the battery unit, outputs a control signal having a first level when a first voltage generated based on the charge voltage of the battery unit is greater than or equal to a first threshold voltage, and outputs a control signal having a second level when the first voltage is smaller than the first threshold voltage; a second control circuit which, during the charge operation of the battery unit, outputs, as the first voltage, a voltage smaller than the first threshold voltage if a second voltage generated based on the charge voltage of the battery unit is greater than or equal to a second threshold voltage; and a switching circuit which turns on the display unit in response to the control signal having the first level and turns off the display unit in response to the control signal having the second level.
  • the portable charge/discharge apparatus further includes a voltage supply circuit which supplies a voltage to the display unit when an external charger is connected to the input port in order to perform the charge operation of the battery unit or when an external apparatus is connected to the output port in order to perform the discharge operation of the battery unit.
  • a portable charge/discharge apparatus including an input port and an output port, the portable charge/discharge apparatus including a battery and a battery protector which are serially connected between a first power line and a second power line; a detection block which detects a reverse current flowing into the portable charge/discharge apparatus from the external apparatus connected to the output port, and outputs a first control signal; and a protection circuit block which outputs a second control signal to the battery protector in response to the first control signal, wherein the battery protector is enabled/disabled in response to the second control signal.
  • the detection block includes a voltage generation circuit which generates a first voltage and a second voltage on the basis of the reverse current; and a comparison circuit which outputs, as the first control signal, a voltage generated using the first voltage on the basis of an output signal generated based on a difference between the first voltage and the second voltage.
  • the protection circuit block includes a first switching circuit which outputs the second control signal in response to the first control signal; a display unit which is connected between the first power line and an output terminal of the first switching circuit and turned on or off in response to the second control signal; and a second switching circuit which controls transmission of the second control signal to the battery protector in response to the second control signal.
  • a portable charge/discharge apparatus including an input port and an output port, the portable charge/discharge apparatus including a resistor circuit connected between the input port and the output port; a switch connected to the resistor circuit in parallel; a comparison circuit which outputs, as a first control signal, a voltage generated using a first voltage on the basis of an output signal generated based on a difference between the first voltage and a second voltage both generated at both ends of the resistor circuit; a switching circuit switched on in response to the first control signal; a display unit connected between the input port and an output terminal of the switching circuit; and a battery unit connected between the output port and a ground line.
  • a portable charge/discharge apparatus including an input port and an output port, the portable charge/discharge apparatus including a battery unit; and a switching circuit which supplies an input voltage received via the input port to an external apparatus via the output port on the basis of a first operating state and supplies the voltage received via the input port to both the battery unit and an external apparatus connected with the output port on the basis of a second operating state.
  • a portable charge/discharge apparatus including an input port and an output port, the portable charge/discharge apparatus including a battery unit; a connection detection unit which generates a control signal on the basis of whether an external apparatus has been connected to the output port; and a voltage conversion circuit which converts a voltage discharged from the battery unit into a direct current (DC) voltage in response to the control signal and supplying the DC voltage to the external apparatus.
  • DC direct current
  • the portable charge/discharge apparatus further includes a display unit which displays either a charge operation or a discharge operation of the battery unit; and a detection circuit which, during the charge operation of the battery unit, detects a charge voltage of the battery unit and turns on the display unit if the detected charge voltage is greater than or equal to a first reference voltage and turns off the display unit if the detected charged voltage is greater than a second reference voltage, and during the discharge operation of the battery unit, detects a discharge voltage of the battery unit and turns on the display unit if the detected discharge voltage is equal to and smaller than the second reference voltage and turns off the display unit if the detected discharge voltage is smaller than the first reference voltage, wherein the second reference voltage is greater than the first reference voltage.
  • connection detection unit When the external apparatus has been connected to the output port, the connection detection unit generates the control signal for enabling the voltage conversion circuit on the basis of a voltage received from the external apparatus.
  • FIG. 2 is a block diagram of a portable charge/discharge apparatus 100 according to an embodiment of the present invention.
  • the portable charge/ discharge apparatus 100 which is connected to a portable electronic apparatus, for example, a mobile phone, a personal digital assistant (PDA), a PDA phone, a portable multimedia player (PMP), an MP3 player, or a portable communication device, and supplies power to the portable electronic apparatus, includes an input port 110 (for example, a TTA 24 pin), an output port 120 (for example, a TTA 24 pin), a battery unit 130, a detection circuit 140, a display unit 150, and a voltage supply circuit 160.
  • a portable electronic apparatus for example, a mobile phone, a personal digital assistant (PDA), a PDA phone, a portable multimedia player (PMP), an MP3 player, or a portable communication device, and supplies power to the portable electronic apparatus
  • PDA personal digital assistant
  • PMP portable multimedia player
  • MP3 player MP3 player
  • the input port 110 is connected to an external charger (not shown) and thus supplies a power supply voltage from the external charger to the portable charge/discharge apparatus 100.
  • the output port 120 supplies a voltage discharged from the battery unit 130 to the connected external apparatus.
  • the external apparatus may be a portable phone, a PDA, an MP3, a laptop computer, a digital camera, a PMP, or the like.
  • the input port 110 and the output port 120 may be implemented as Telecommunications Technology Association (TTA) standard 24 pin connectors.
  • TTA Telecommunications Technology Association
  • the input port 110 and the output port 120 may be implemented as USB connectors, optical connectors, card edge connectors, direct-type connectors, one-piece connectors, two-piece connectors, flat cable connectors, square connectors, multi-pole relay connectors, circular connectors, coaxial connectors, or integrated circuit (IC) sockets.
  • TTA Telecommunications Technology Association
  • the battery unit 130 includes a battery 131 and a battery protector 132. While the portable charge/discharge apparatus 100 is being charged, the battery 131 is charged with the voltage (or a potential) supplied from the external charger connected to the input port 110. While the portable charge/discharge apparatus 100 is being discharged, the battery 130 outputs the charged voltage to the external apparatus connected to the output port 120.
  • the battery 131 may be implemented as a nickel-cadmium (Ni-Cd) battery, an alkaline battery, a nickel hydrogen battery, a sealed lead-acid battery, a lithium ion (Li-ion) battery, a lithium polymer (Li-polymer) battery, or the like.
  • the battery 131 may be a solar battery that can perform a charge operation by using solar light.
  • the battery 131 may be a fuel cell.
  • the portable charge/discharge apparatus 100 may further include a fuel tank that can receive or charge the fuel cell.
  • the battery 131 may be a battery using an electrical reaction, a battery using a chemical reaction, or a battery using photo-electric conversion.
  • the battery protector 132 performs an operation, for example, a switching operation, in order to protect the battery 131, when the battery 131 is over charged or over discharged.
  • the detection circuit 140 detects a charge voltage of the battery unit 130. When the detected charge voltage is higher than or equal to a first reference voltage, the detection circuit 140 turns on the display unit 150. When the detected charge voltage is higher than a second reference voltage, the detection circuit 140 turns off the display unit 150. When the detected charge voltage is lower than the first reference voltage, the detection circuit 140 turns off the display unit 150.
  • the detection circuit 140 detects a discharge voltage of the battery unit 130. When the detected discharge voltage is equal to or lower than the second reference voltage, the detection circuit 140 turns on the display unit 150. When the detected discharged voltage is lower than the first reference voltage, the detection circuit 140 turns off the display unit 150.
  • the display unit 150 is turned on when the charge voltage or discharge voltage of the battery unit 130 is in between the first reference voltage and the second reference voltage.
  • Each of the first reference voltage and the second reference voltage may be set appropriately according to embodiments.
  • the detection circuit 140 includes a first control circuit 141, a second control circuit
  • the first control circuit 141 When the battery unit 130 is charged, if a first voltage Vl generated based on the charge voltage of the battery unit 130 is higher than or equal to a first threshold voltage Vthl, the first control circuit 141 outputs a control signal Vc having a first level (for example, a high level). If the first voltage Vl is lower than the first threshold voltage Vthl, the first control circuit 141 outputs a control signal Vc having a second level (for example, a low level).
  • the first control circuit 141 includes a first resistor Rl, a second resistor R2, and a first switching unit PZDl.
  • the first resistor Rl is connected between a first power line Ll and a first node NDl
  • the second resistor R2 is connected between the first node NDl and a second node ND2.
  • the first switching unit PZDl is connected between the first power line Ll and a third node ND3 and outputs to the switching circuit 143 a voltage supplied via the first power line Ll on the basis of the first voltage Vl.
  • the first voltage Vl represents a voltage of the first node NDl
  • the first threshold voltage Vthl represents a threshold voltage of the first switching unit PZDl.
  • the second control circuit 142 When the battery unit 130 is charged, if a second voltage V2 generated based on the charge voltage of the battery unit 130 is higher than or equal to a second threshold voltage Vth2, the second control circuit 142 outputs, as the first voltage Vl, a voltage lower than the first threshold voltage Vthl. That is, the second control circuit 142 outputs a voltage of the second node ND2 as the first voltage Vl.
  • the second control circuit 142 includes a third resistor R3, a fourth resistor R4, and a second switching unit PZD2.
  • the third resistor R3 is connected between the first power line Ll and a fourth node ND4, and the fourth resistor R4 is connected between the second node ND2 and the fourth node ND4.
  • the second switching unit PZD2 is connected between the first node NDl and the second node ND2 and outputs the voltage of the second node ND2 to the first node ND 1 on the basis of the second voltage V2.
  • the second voltage V2 represents a voltage of the fourth node ND4, and the second threshold voltage Vth2 represents a threshold voltage of the second switching unit PZD2.
  • the first and second switching units PZDl and PZD2 may be implemented as Zener diodes.
  • the threshold voltage Vthl of the first switching unit PZDl is lower than the threshold voltage Vth2 of the second switching unit PZD2.
  • the switching circuit 143 is connected between an output terminal of the display unit
  • the switching circuit 143 may be implemented as a MOSFET or a bipolar junction transistor (BJT).
  • the detection circuit 140 may further include a protection circuit 144 for preventing the first switching unit PZDl from being destroyed due to inflow of external sudden current and for stabilizing an operation of the first switching unit PZDl.
  • the protection circuit 144 includes a fifth resistor R5, a capacitor Cl, a sixth resistor R6, a diode Dl, and a seventh resistor R7.
  • the fifth resistor R5 is connected between the first power line Ll and the fifth node ND5, and the first capacitor Cl is connected between a fifth node ND5 and a sixth node ND6.
  • the sixth resistor R6 is connected between the second node ND2 and the sixth node ND6.
  • the diode Dl is connected between the third node ND3 and the sixth node ND6, and the seventh resistor R7 is connected between the second node ND2 and the third node ND3.
  • the power supply circuit 160 supplies a voltage to the display unit 150 when the external charger is connected to the input port 110 in order to charge the battery unit 130 or when the external apparatus is connected to the output port 120 in order to discharge the battery unit 130.
  • the power supply circuit 160 includes an eighth resistor R8, a ninth resistor R9, and a comparator Ul.
  • the eighth resistor R8 is connected between the second node ND2 and a first input terminal, for example, a positive input terminal, of the comparator Ul.
  • the ninth resistor R9 is connected between the second node ND2 and an output terminal of the comparator Ul.
  • a second input terminal, for example, a negative input terminal, of the comparator Ul is grounded.
  • the comparator Ul amplifies a difference between voltages input to the first and second input terminals of the comparator Ul and outputs the amplified voltage difference.
  • the display unit 150 is connected between the output terminal of the voltage supply circuit 160 and the input terminal of the switching circuit 143, and receives the voltage from the power supply circuit 160 and is turned on or off based on an operation of the switching circuit 143.
  • the display unit 150 may be implemented as a light emitting diode (LED) LEDl.
  • LED light emitting diode
  • the display unit 150 may further include a tenth resistor RlO connected between the output terminal of the voltage supply circuit 160 and an input terminal of the LED LEDl.
  • FIG. 3 illustrates a portable charge/discharge apparatus 200 according to another embodiment of the present invention.
  • the portable charge/ discharge apparatus 200 includes an input port 110, an output port 120, a battery unit 130, a detection block 210, and a protection circuit block 220.
  • the input port 110 is connected to an external charger (not shown) and supplies a power supply voltage received from the external charger to the portable charge/discharge apparatus 200.
  • the output port 120 supplies a voltage discharged from the battery unit 130 to an external apparatus (for example, a mobile phone or the like) connected with the output port 120.
  • the input port 110 and the output port 120 may be implemented as standard 24 pin connectors for use in mobile phones, USB connectors, USB connectors, optical connectors, card edge connectors, direct- type connectors, one-piece connectors, two- piece connectors, flat cable connectors, square connectors, multi-pole relay connectors, circular connectors, coaxial connectors, or IC sockets.
  • the battery unit 130 includes the battery 131 and the battery protector 132 which are serially connected between the first power line Ll and a second power line, for example, a line for supplying a ground voltage.
  • the battery 131 receives and stores a voltage (or potential) which is supplied from the external charger connected with the input port 110.
  • the battery 130 discharges a charge voltage to the external apparatus connected with the output port 120.
  • the battery 130 may be implemented as a Ni-Cd battery, an alkaline battery, a nickel hydrogen battery, a sealed lead-acid battery, a Li-ion battery, a Li-polymer battery, or the like.
  • the battery protector 132 operates when the battery 131 is over charged or over discharged, so as to protect the battery 131.
  • the detection block 210 detects a reverse current Is received from the external apparatus connected with the output port 120 and outputs a first control signal Vo.
  • the detection block 210 includes a voltage generation circuit 211 and a comparison circuit 212.
  • the voltage generation circuit 211 generates a first voltage V3 and a second voltage V4 on the basis of the received reverse current Is.
  • the voltage generation circuit 211 generates the first voltage V3 by using the reverse current Is flowing in the voltage generation circuit 211 and outputs the first voltage V3 via an input terminal of the voltage generation circuit 211.
  • the voltage generation circuit 211 generates the second voltage V4 by using the reverse current Is flowing in the voltage generation circuit 211 and outputs the second voltage V4 via an output terminal of the voltage generation circuit 211.
  • the voltage generation circuit 211 may be implemented as a shunt resistor SRl.
  • the comparison circuit 212 may amplify a difference between the first voltage V3 and the second voltage V4 and output the first voltage V3 as a first control signal Vo in response to an amplified output signal Vu corresponding to the amplified difference.
  • the comparison circuit 212 includes a comparator U2 and a first switching unit Q2.
  • the comparator U2 receives the first voltage V3 via a first input terminal, for example, a positive input terminal, and the second voltage V4 via a second input terminal, for example, a negative input terminal, amplifies the difference between the first and second voltages V3 and V4, and output the amplified output signal Vu.
  • the first switching unit Q2 when the reverse current Is is received from the external apparatus, the first voltage V3 is greater than the second voltage V4, and thus the comparator U2 outputs an amplified output signal Vu having the first level.
  • the first switching unit Q2 outputs the first voltage V3 as the first control signal Vo in response to the amplified output signal Vu having the first level.
  • the first switching unit Q2 may be implemented as a MOSFET (for example, a PMOSFET or a NMOSFET) or a BJT (for example, a npn TR or a pnp TR).
  • the comparison circuit 212 may further include a first resistor Rl 1 and a second resistor R 12.
  • the first resistor Rl 1 is connected between the input terminal of the voltage generation circuit 211 and the first input terminal of the second comparator U2.
  • the second resistor R12 is connected between the output terminal of the voltage generation circuit 211 and the second input terminal of the comparator U2.
  • the first voltage V3 and the second voltage V4 supplied to the first and second input terminals of the comparison circuit 212, respectively, may be voltages decreased by the first and second resistors RI l and R 12, respectively.
  • the protection circuit block 220 outputs a second control signal Vd to the battery protector 132 in response to the first control signal Vo.
  • the protection circuit block 220 includes a first switching circuit 221, a second switching circuit 222, and a display unit 223.
  • the first switching circuit 221 outputs the second control signal Vd on the basis of the first control signal Vo.
  • the first switching circuit 221 outputs a ground voltage GND as the second control signal Vd to a node ND7 on the basis of the first control signal Vo.
  • the first switching circuit 221 includes a plurality of resistors Rl 3, R 14, and Rl 5 and a second switching unit Q3.
  • the resistor R13 is connected between a node ND 12 and a ground terminal GND.
  • the resistor R 14 is connected between the node ND 12 and a node ND 13.
  • the resistor Rl 5 is connected between the node ND 13 and a ground terminal GND.
  • the second switching unit Q3 is turned on or off based on the first control signal Vo, that is, a voltage of the node ND 13. When the voltage of the node ND 13 is enough to turn on the second switching unit Q3, the voltage of the node ND7 is pulled down to the ground voltage GND.
  • the second switching circuit 222 controls transmission of the second control signal
  • the second switching circuit 222 when the second switching circuit 222 is turned on based on the voltage of the node ND7, for example, the second control signal Vd having a ground voltage level, the second switching circuit 222 outputs the second control signal Vd having the ground voltage level to the battery protector 132.
  • the display unit 223 implemented as an LED LED2 emits light based on the voltage received via the first power line Ll, for example, the second voltage V4.
  • the display unit 223 may further include a resistor Rl 6 connected between the first power line Ll and an input terminal of the LED LED2.
  • the battery protector 132 is enabled/disabled in response to the second control signal
  • the battery protector 132 blocks its internal circuit (not shown) in response to the second control signal Vd having a low level, for example, the ground voltage level, output from the second switching circuit 222, thereby separating the battery 131 from the battery protector 132.
  • the battery protector 132 protects the battery 131.
  • FIG. 4 illustrates a portable charge/discharge apparatus 300 according to another embodiment of the present invention.
  • the portable charge/ discharge apparatus 300 includes an input port 110, an output port 120, a battery unit 130, a voltage generation block 310, a comparison circuit 320, a switching circuit 330, and a display unit 340. While the portable charge/discharge apparatus 300 is being charged, the input port 110 is connected to an external charger (not shown) so as to provide a power supply voltage received from the external charger to the portable charge/discharge apparatus 300.
  • the output port 120 provides a voltage discharged from the battery unit 130 to an external apparatus (for example, a mobile phone or the like) connected with the output port 120.
  • the input port 110 and the output port 120 may be implemented as TTA 24 pin connectors, USB connectors, optical connectors, card edge connectors, direct-type connectors, one-piece connectors, two-piece connectors, flat cable connectors, square connectors, multi-pole relay connectors, circular connectors, coaxial connectors, or IC sockets.
  • the battery unit 130 includes a battery 131 and a battery protector 132 which are serially connected between the output port 120 and a ground line. While the portable charge/discharge apparatus 300 is being charged, the battery 131 is charged with a voltage supplied from the external charger connected to the input port 110. While the portable charge/discharge apparatus 300 is being discharged, the charged voltage is discharged from the battery 130 outputed to the external apparatus connected with the output port 120.
  • the voltage generation block 310 includes a plurality of resistors 311 and 312 and a switch 313.
  • the resistor 311 is connected between the input port 110 and the output port 120.
  • the resistor 312 is connected to the resistor 311 in parallel via the switch 313.
  • the switch 313 is turned off automatically or manually. Accordingly, a first voltage V5 and a second voltage V6 are generated by a current Il flowing in the resistor 311.
  • the current Il flowing in the resistor 311 is the same as a current Iin input to an input terminal of the voltage generation block 310.
  • the switch 313 is turned on automatically or manually. Accordingly, the current Iin input to the input terminal of the voltage generation block 310 is divided into a current Il flowing through the resistor 311 and a current 12 flowing through the resistor 312. The current Il flowing in the resistor 311 may be controlled constantly by an on/off operation of the switch 313.
  • the comparison circuit 320 outputs a voltage V6 as a first control signal Vo on the basis of an output signal Vu generated based on a difference between the first and second voltages V5 and V6 output from both terminals of the resistor 311.
  • the comparison circuit 320 includes a comparator U3 and a first switching unit Q4.
  • the comparator U3 receives and compares the first voltage V5 and the second voltage V6 and outputs output signals Vu having different voltage levels according to results of the comparison.
  • the first switching unit Q4 outputs the second voltage V6 as the first control signal
  • the first switching unit Q4 may be implemented as a MOSFET or a BJT.
  • the comparison circuit 320 may further include a first resistor R21 and a second resistor R22.
  • the comparator U3 compares a voltage input to a first input terminal, that is, a positive input terminal, via the first resistor R21 with a voltage input to a second input terminal, that is, a negative input terminal, via the second resistor R22, and outputs the output signals Vu according to the results of the comparison.
  • the switching circuit 330 is switched in response to the first control signal Vo so as to supply a ground voltage GND to the display unit 340 via the node ND21.
  • the switching circuit 330 includes a plurality of resistors R23, R24, and R25 and a second switching unit Q5.
  • the resistor R23 is connected between a node ND22 and a ground terminal GND.
  • the resistor R24 is connected between the node ND22 and a node ND23.
  • the resistor R25 is connected between the node ND23 and the ground terminal GND.
  • the second switching unit Q5 controls so that voltage of the node ND21 has the ground voltage GNDND21 on the basis of a voltage of the node ND23 generatedbased on the first control signal Vo.
  • the second switching unit Q5 may be implemented as a MOSFET or a BJT.
  • the display unit 340 is connected between the input port 110 and the output terminal of the switching circuit 330, that is, the node ND21.
  • the display unit 340 is turned on.
  • the display unit 340 is turned off. In other words, the display unit 340 is turned on or off according to a switching operation of the second switching unit Q5.
  • the first and second voltages V5 and V6 input to the comparison circuit 320 may be controlled by controlling the current Il flowing through the resistor 311 according to a switching operation of the switch 313. Accordingly, the comparison circuit 320 of the portable charge/discharge apparatus 300 outputs the first control signal Vo having the second level so that the display unit 340 is not turned on.
  • FIG. 5 illustrates a portable charge/discharge apparatus 400 according to another embodiment of the present invention.
  • the portable charge/ discharge apparatus 400 includes an input port 110, an output port 120, a switching circuit 410, and a battery unit 130.
  • the output port 120 supplies a voltage charged in the battery unit 130 to an external apparatus connected to the output port 120.
  • the switching circuit 410 supplies an input voltage received via the input port 110 to the external apparatus via the output port 120 on the basis of a first operating state Pl, and supplies the input voltage received via the input port 110 to both the battery unit 130 and the external apparatus connected with the output port 120 on the basis of a second operating state P2.
  • the first and second operating states Pl and P2 are determined according to a configuration of the contacts of switches.
  • the switching circuit 410 connects a first terminal Dl with a second terminal D2 and a fourth terminal D4 with a fifth terminal D5 on the basis of the first operating state Pl. Consequently, the switching circuit 410 connects the input port 110 with the output port 120 on the basis of the first operating state Pl and then immediately supplies a power supply voltage received via the input port 110 to the external apparatus connected with the output port 120, for example, to a mobile phone, a PDA, or the like, via the output port 120.
  • the second and third terminals D2 and D3 of the switching circuit 410 are not connected to each other, and thus the input port 110 and the battery unit 130 are not connected to each other. Accordingly, the power supply voltage received via the input port 110 is supplied to only the external apparatus connected with the output port 120 via the output port 120.
  • the switching circuit 410 connects the second terminal D2 with a third terminal D3 and the fifth terminal D5 with a sixth terminal D6 on the basis of the second operating state P2. Consequently, the switching circuit 410 connects the input port 110 with the battery unitl30 and at the same time connects the input port 110 with the output port 120, on the basis of the second operating state P2. Accordingly, when the external apparatus is connected to the output port 120, the switching circuit 410 supplies the power supply voltage received via the input port 110 to both the external apparatus and the battery unit 130.
  • the switching circuit 410 supplies the power supply voltage to only the battery unit 130.
  • the switching circuit 410 supplies the voltage charged in the battery unit 130 to the external apparatus.
  • the switching circuit 410 may be implemented as a switch which is manually manipulated to switch the first and second operating states Pl and P2, or as a switch which is automatically switched in response to a control signal output from an internal control signal generator (not shown).
  • the battery unit 130 includes a battery 131 and a battery protector 132 which are serially connected between an output terminal and a ground terminal of the switching circuit 410.
  • the battery 131 may be charged with the power supply voltage received via the input port 110 or the charged voltage may be discharged from the battery 131 to the external apparatus via the output port 120.
  • the battery protector 132 operates to protect the battery 131, when the battery 131 is over charged or over discharged.
  • FIGS. 6 and 7 illustrate a portable charge/discharge apparatus 500 according to another embodiment of the present invention.
  • the portable charge/discharge apparatus 500 includes an input port 110, an output port 120, a battery unit 130, a detection unit 510, a voltage conversion circuit 520, a detection circuit 140, a display unit 150, and a voltage supply circuit 530.
  • the portable charg e/ discharge apparatus 500 may further include an over charge prevention unit 540.
  • the battery unit 130 includes a battery 131 and a battery protector 132 which are serially connected between a first power line Ll and a second power line, for example, a line for supplying a ground voltage. While the portable charge/discharge apparatus 500 is being charged, the battery 131 is charged with a voltage supplied from an external charger connected with the input port 110. While the portable charge/ discharge apparatus 500 is being discharged, the battery 131 supplies a charge voltage (or a discharge voltage) to an external apparatus connected with the output port 120.
  • the connection detection unit 510 generates a control signal EN on the basis of whether the output port 120 and the external apparatus are connected to each other.
  • the connection detection unit 510 outputs the control signal EN, which is used to enable the voltage conversion circuit 520 in response to a voltage output from the external apparatus, for example, a voltage having the high level.
  • the connection detection unit 510 may be implemented as a MOSFET (for example, a PMOSFET or an NMOSFET) or a BJT (for example, a npn transistor or a pnp transistor).
  • the voltage output from the external apparatus may be input to a gate of the MOSFET or to a base of the BJT.
  • the voltage conversion circuit 520 converts a voltage discharged from the battery unit 130 into a DC voltage in response to the control signal EN, and supplies the DC voltage to the external apparatus via the output port 120.
  • the voltage conversion circuit 520 is enabled in response to a control signal EN having the high level and thus converts the voltage discharged from the battery unit 130 into the DC voltage and supplies the DC voltage to the external apparatus connected with the output port 120.
  • the voltage conversion circuit 520 includes a reactor L, a diode D3, a voltage converter 521, a capacitor Cl, and a resistor R31.
  • the voltage converter 521 may be implemented as a DC-DC converter.
  • the reactor L is connected between the first power line Ll and an input terminal of the voltage converter 521.
  • the diode D3 is connected between the input terminal and an output terminal of the voltage converter 521.
  • the capacitor Cl is connected between the output terminal of the voltage converter 521 and a ground terminal GND.
  • the detection circuit 140 detects a charge voltage of the battery unit 130. If the detected charge voltage is greater than or equal to a first reference voltage, the detection circuit 140 turns on the display unit 150. If the detected charge voltage is greater than a second reference voltage, the detection circuit 140 turns off the display unit 150. For example, the second reference voltage may be higher than the first reference voltage.
  • the detection circuit 140 While the battery unit 130 is being discharged, the detection circuit 140 detects a discharge voltage of the battery unit 130. If the detected discharge voltage is equal to or smaller than the second reference voltage, the detection circuit 140 turns on the display unit 150. If the detected discharge voltage is smaller than the first reference voltage, the detection circuit 140 turns off the display unit 150.
  • the display unit 150 displays a charge or discharge operation of the battery unit 130.
  • the voltage supply circuit 530 includes a second diode D4 and a third diode D5.
  • the second diode D4 is connected between the input port 110 and the input terminal of the display unit 150 and thus outputs the voltage supplied from the external apparatus to the display unit 150 while charging the battery unit 130.
  • the third diode D5 is connected between the input terminal of the voltage conversion circuit 520 and the input terminal of the display unit 150 and thus supplies a voltage for turning on the display unit 150 to the display unit 150 while discharging the battery unit 130.
  • the portable charge/discharge apparatus 500 may further include the over charge prevention unit 540 in order to prevent the battery unit 130 from being over charged.
  • the over charge prevention unit 540 includes a second resistor R32 and a fourth diode D6.
  • the second resistor R32 is connected between the input port 110 and the node ND31 and thus restricts over current that flows into the portable charge/discharge apparatus 500 via the input port 110.
  • the fourth diode D6 is connected between a node ND31 and the first power line Ll and prevents a reverse current from flowing into the node ND31.
  • the present invention is applicable to charge/discharge apparatuses.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention porte sur un appareil de charge/décharge portable comprenant un port d'entrée et un port de sortie. L'appareil de charge/décharge portable comporte une unité de batterie; une unité d'affichage affichant soit une opération de charge soit une opération de décharge de l'unité de batterie; et un circuit de détection. Pendant l'opération de charge de l'unité de batterie, l'unité de circuit de détection détecte une tension de charge de l'unité de batterie; allume l'unité d'affichage si la tension de charge détectée est supérieure ou égale à une première tension de référence; et éteint l'unité d'affichage si la tension de charge détectée est supérieure à une seconde tension de référence. Pendant l'opération de décharge de l'unité de batterie, l'unité de circuit de détection détecte une tension de décharge de l'unité de batterie; allume l'unité d'affichage si la tension de décharge détectée est inférieure ou égale à la seconde tension de référence; et éteint l'unité d'affichage si la tension de décharge détectée est inférieure à la première tension de référence, la seconde tension de référence étant supérieure à la première tension de référence.
PCT/KR2008/006744 2007-11-21 2008-11-17 Appareils de charge/décharge portables WO2009066908A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020070119386A KR100990664B1 (ko) 2007-11-21 2007-11-21 휴대용 충/방전 장치
KR10-2007-0119386 2007-11-21
KR10-2007-0119387 2007-11-21
KR1020070119387A KR100973325B1 (ko) 2007-11-21 2007-11-21 휴대용 충/방전 장치들

Publications (2)

Publication Number Publication Date
WO2009066908A2 true WO2009066908A2 (fr) 2009-05-28
WO2009066908A3 WO2009066908A3 (fr) 2009-08-20

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Application Number Title Priority Date Filing Date
PCT/KR2008/006744 WO2009066908A2 (fr) 2007-11-21 2008-11-17 Appareils de charge/décharge portables

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Country Link
WO (1) WO2009066908A2 (fr)

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Publication number Priority date Publication date Assignee Title
FR2950750A1 (fr) * 2009-09-30 2011-04-01 St Ericsson Grenoble Sas Dispositif d'alimentation en energie electrique pour un equipement portable de telecommunication, et equipement portable utilisant un tel dispositif
WO2012119535A1 (fr) * 2011-03-10 2012-09-13 苏州盖娅智能科技有限公司 Circuit de protection parallèle pour un module solaire
CN108321892A (zh) * 2012-06-27 2018-07-24 大众汽车有限公司 用于为电能存储器充电的方法和装置

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KR20060090411A (ko) * 2005-02-05 2006-08-11 주식회사 아트랑 외장형 전지팩의 이동단말기 충전 제어장치 및 방법
KR20070023337A (ko) * 2005-08-24 2007-02-28 주식회사 팬택 접촉 불량 알림 기능을 제공하는 이동통신 단말기의 충전기거치대 및 그 방법
KR20070064878A (ko) * 2005-12-19 2007-06-22 삼성전자주식회사 팩 구조의 배터리 고속 충전 장치 및 방법

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KR20050026360A (ko) * 2003-09-09 2005-03-15 텍사스 인스트루먼츠 인코포레이티드 배터리 보호회로
KR20060090411A (ko) * 2005-02-05 2006-08-11 주식회사 아트랑 외장형 전지팩의 이동단말기 충전 제어장치 및 방법
KR20070023337A (ko) * 2005-08-24 2007-02-28 주식회사 팬택 접촉 불량 알림 기능을 제공하는 이동통신 단말기의 충전기거치대 및 그 방법
KR20070064878A (ko) * 2005-12-19 2007-06-22 삼성전자주식회사 팩 구조의 배터리 고속 충전 장치 및 방법

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2950750A1 (fr) * 2009-09-30 2011-04-01 St Ericsson Grenoble Sas Dispositif d'alimentation en energie electrique pour un equipement portable de telecommunication, et equipement portable utilisant un tel dispositif
WO2011039326A3 (fr) * 2009-09-30 2011-11-17 St-Ericsson (Grenoble) Sas Dispositif d'alimentation électrique d'un équipement de télécommunication mobile, et équipement portable l'utilisant
WO2012119535A1 (fr) * 2011-03-10 2012-09-13 苏州盖娅智能科技有限公司 Circuit de protection parallèle pour un module solaire
CN108321892A (zh) * 2012-06-27 2018-07-24 大众汽车有限公司 用于为电能存储器充电的方法和装置

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