JP2008074258A - Portable power source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable power source device capable of feeding electric power to load equipment by connecting it to an external power source, even singly feeding the electric power, not requiring idling operation of an engine for feeding the electric power when it is connected to an on-vehicle battery and capable of continuously feeding the electric power to the load equipment for a fixed time even if the engine is stopped. <P>SOLUTION: The portable power source device 1 is provided with an input means 22 connectable to an external power source; an output means 32 connected to the load equipment 51; and a backup battery 10 chargeable by the external power source. The device 1 is provided with a main closed circuit L1 for connecting the input means 22 and the output means 32 and feeding the electric power from the external power source to the load equipment 51; a backup power feed circuit L8 for feeding the electric power from the backup battery 10 to the load equipment 51; a feeding impossibility display circuit L7 for informing the electric power feeding impossibility state; a relay switch RL1 for switching the backup power feed circuit L8 and the feeding impossibility display circuit L7; and a relay drive circuit L4 for driving the relay switch RL1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable power supply device that is connected to an external power source such as an in-vehicle battery and supplies power to a load device, and can supply power to the load device alone.

  2. Description of the Related Art Conventionally, various power supply devices have been proposed that connect power to a power socket such as a cigarette lighter provided on a center panel or the like of an automobile and supply electric power to a load device such as an in-vehicle cold-reserving unit or a cool air blower.

  For example, Patent Document 1 discloses an in-vehicle power source in which an electric circuit including a DC / AC converter is incorporated in a case, and a power supply device having an AC outlet on the case surface is housed in an ashtray installation space provided on a panel or the like in an automobile. A device has been proposed.

Further, Patent Document 2 includes a portable battery that is detachably attached to a vehicle body and an auxiliary battery made of a solar battery, and is configured to charge the portable battery with the auxiliary battery via a connecting means. A power supply has been proposed.
JP 2000-233697 A JP 11-341700 A

  By the way, the vehicle-mounted power supply device of Patent Document 1 is a power supply device of a type that is stored and used in an ashtray installation space, and is not a portable power supply device. Further, in order to supply electric power to the load device when the automobile is parked or stopped, it is necessary to perform idling operation of the engine. After the engine is stopped, it is not possible to supply electric power to the load device.

  The in-vehicle power supply device of Patent Document 2 is a portable power supply device that can supply power to the load device even after the engine is stopped, but is intended for a vehicle equipped with an auxiliary battery made of solar cells.

  The present invention was devised in view of the above circumstances, and is connected to an external power supply to supply power to the load device, and can be supplied to the load device alone, and when connected to an in-vehicle battery, An object of the present invention is to provide a portable power supply device that does not require idling operation of an engine to supply power to a load device and can continue to supply power to the load device for a certain time even when the engine is stopped. .

In order to achieve the above object, a portable power supply apparatus according to the present invention includes input means connectable to an external power supply, output means connected to a load device, and a backup battery that can be charged by the external power supply. A portable power supply,
A main closed circuit for connecting the input means and the output means to supply power from the external power source to the load device;
A backup power supply circuit for supplying power to the load device from the backup battery;
A supply failure display circuit for notifying a power supply impossible state;
A relay drive circuit that selectively switches between the backup power supply circuit and the supply failure display circuit;
It is characterized by having.

  According to the portable power supply device according to the present invention, a main closed circuit for connecting the input means and the output means to supply power from the external power source to the load device, a backup power supply circuit for supplying power from the backup battery to the load device, Therefore, it is possible to supply power to the load device by connecting to an external power source and to supply power to the load device alone. In addition, since power can be supplied from the backup battery to the load device, when connected to the on-board battery, idling operation of the engine is not required to supply power to the load device. Can continue to supply power.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a portable power supply device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external configuration diagram of an embodiment of a portable power supply device according to the present invention. FIG. 2 is a block diagram of a circuit configuration of the portable power supply device according to this embodiment.

  Referring to FIG. 1, the main body of the power supply device 1 according to the present embodiment includes a backup battery 10 and a power supply unit 20 in which a power supply circuit is housed. The backup battery 10 has a portable size of, for example, a width of 181 ± 1 mm × depth of 76 ± 1 mm × height of 167 ± 1 mm. The parts 11 and 12 that also serve as hooks for attaching the hooks of the hanging straps are formed.

  A power switch (Pow Sw) 21 for operating the power supply device 1 of the present embodiment is disposed at the upper center of the power supply unit 20. On the left and right of the power switch 21, there are LED1 (green) as a power lamp for displaying a power input state (Pow On) and a power supply state, and LED2 (red) for displaying a power supply impossible state (Batt Low). It is arranged.

  On the output side (OUT side) of the power supply unit 20, for example, an output cable 31 that can be connected to various load devices 51 (see FIG. 2) such as an in-vehicle cold-retaining unit and a cooling fan is extended. An output connector (corresponding to the output means of the present invention) 32 to which the load device 51 can be connected is attached to the tip portion.

  The power supply device 1 according to the present embodiment can be used alone as a portable power supply device, but is used by being connected to a power supply socket (not shown) such as a cigarette lighter socket provided on a center panel of an automobile. It is also possible. Therefore, an input connector (corresponding to the input means of the present invention) 22 is disposed on the input side (IN side) of the power supply unit 20, and a plug cable 41 that can be connected to the power socket is provided on the input connector 22. Connected. A connection connector 42 that can be connected to the input connector 22 is attached to the proximal end side of the plug cable 41, and an insertion plug 43 that can be connected to the power socket is attached to the distal end side.

  The input connector 22 can also be connected to a household AC power source by replacing the plug cable 41 with an adapter cable 61. The adapter cable 61 is provided with an AC adapter 63. A connection connector 62 that can be connected to the input connector 22 is attached to the proximal end of the adapter cable 61, and an insertion plug that can be connected to a household AC outlet on the distal end. 64 is attached (see FIG. 2).

  Next, the configuration of the power supply circuit housed in the power supply unit 20 of the power supply device 1 according to the present embodiment will be described with reference to FIG.

  As described above, the power supply device 1 according to the present embodiment can be used alone, but can also be used by connecting to a power socket such as a cigarette lighter socket of an automobile. In FIG. 2, the power supply socket on the vehicle side and the plug cable 41 are omitted, and the connection connector 42 is shown in the closed circuit L0 having the on-board battery 45 of 12V (24V). That is, in FIG. 2, the connection connector 42 is provided in a closed circuit L0 having an in-vehicle battery 45 that is supplied with power when the engine switch (IGSW) 44 is started, and in the closed circuit L0, more than the engine switch (IGSW) 44. It is interposed downstream in the current direction.

  The power supply circuit of the power supply device 1 according to the present embodiment is configured by a DC closed circuit, and as described above, the input connector 22 is attached to the input side (IN side), and the vehicle-mounted cold insulation is provided on the output side. An output connector 32 for connecting a power connector 52 of a load device 51 such as a unit is attached. The positive (+) terminals of the input connector 22 and the output connector 32 are connected by a line L2, and the negative (−) terminals are connected by a line L3, thereby supplying power from the in-vehicle battery 45 to the load device 51. A closed circuit L1 is configured. As described above, by connecting the AC adapter cable 61 to the input connector 22, it is also possible to supply power from the household AC power source to the load device 51 via the main closed circuit L1.

  A relay driving circuit L4 having a relay coil (RL1) 25 for driving a relay switch RL1 described later is connected in parallel between the line L2 and the line L3 of the main closed circuit L1, and this relay driving circuit L4. , Diodes D1 and D2, anodes of which are connected in parallel to the line L2, a relay coil (RL1) 25, and a resistor R2 are sequentially connected in series in the current direction.

  Between the diodes D1 and D2 of the relay drive circuit L4 and the relay coil (RL1) 25, a backup battery charging circuit L5 reaching the line L3 of the main closed circuit L1 is connected. The backup battery charging circuit L5 is connected in series with a resistor R1, a 12V backup battery 10 and a power switch 21, and the positive terminal side of the backup battery 10 is connected to the relay drive circuit L4 via the resistor R1. The negative terminal side of the backup battery 10 is connected to the line L3 via the power switch 21.

  A supply display circuit L6 extending to the line L3 is connected between the resistor R1 of the backup battery charging circuit L5 and the connection portion between the backup battery charging circuit L5 and the relay drive circuit L4. The supply display circuit L6 includes a constant current diode (CRD1) that limits the current flowing through the circuit L6 to, for example, about 10 mA to 20 mA to prevent breakage of the LED, a power input state (Power On), or a power supply state Are sequentially connected in series in the current direction.

  Further, between the resistor R1 of the backup battery charging circuit L5 and the backup battery 10, a supply failure indication reaching the line L3 via the off-side contact S2 of the relay switch RL1 driven by the relay coil (RL1) 25 is provided. A circuit L7 is connected. The supply failure display circuit L7 includes a constant current diode (CRD2) that limits the current flowing through the circuit L7 to, for example, about 10 mA to 20 mA to prevent breakage of the LED, and an LED 2 (red) that displays a power supply failure state. Are connected in series in the current direction.

  In the case of LEDs having the same diameter (φ) that emit light at the same current value (for example, 20 mA), LED 2 (red) emits light at a lower voltage than LED 1 (green). In the display circuits L6 and L7, a display lamp may be provided instead of the LED, and a resistor may be provided instead of the constant current diode (CRD).

  The relay switch RL1 is turned on / off based on the voltage applied to the relay coil (RL1) 25 of the relay drive circuit L4. For example, when a voltage exceeding 10 V is applied to the relay coil (RL1) 25 When it contacts the on-side contact S1 and the applied voltage drops to about 10V, it contacts the off-side contact S2. The anode side of the diodes D3 and D4 is connected in parallel to the ON-side contact S1 of the relay switch RL1, and the cathode side is connected to the line L2. When the relay switch RL1 is connected to the on-side contact S1 and the power switch 21 is turned on, the positive terminal of the backup battery 10, the relay switch RL1, the diodes D3 and D4, the load device 51, the power switch 21 and the backup A closed circuit that connects the negative terminal of the battery 10 is formed, and this closed circuit functions as a backup power supply circuit L8 that supplies power from the backup battery 10 to the load device 51.

  Next, with reference to FIG. 2, the usage method and operation | movement of the power supply device 1 which concern on this Embodiment are demonstrated.

  First, a case will be described in which the power supply device 1 according to the present embodiment is used alone to supply power to a load device 51 such as an in-vehicle cold storage unit. In this case, the plug cable 41 and the adapter cable 61 are not connected to the input connector 22 of the power supply unit 20.

  In a state where the power connector 52 of the load device 51 is connected to the output connector 32 of the power unit 20, first, the power switch 21 of the power unit 20 is turned on. When the power switch 21 is turned on, a closed circuit connecting the resistor R1, the relay coil (RL1) 25, the resistor R2, the power switch 21, and the negative terminal of the backup battery 10 is formed from the positive terminal of the backup battery 10, and this closed circuit. 12V current flows from the backup battery 10. When a voltage of 12 V is applied to the relay coil (RL1) 25, the relay switch RL1 is switched to the on-side contact S1, and is connected to the diodes D3 and D4. By connecting the relay switch RL1 to the diodes D3 and D4, the voltage of the backup battery 10 is applied to the load device 51 such as a cold insulation unit. At the same time, a closed circuit is formed from the positive terminal of the backup battery 10 to the resistor R1, the constant current diode (CRD1), LED1 (green), the power switch 21 and the negative terminal of the backup battery 10, and LED1 that displays the power supply state (Green) lights up.

  If the battery is continuously used in this state and the voltage of the backup battery 10 decreases to, for example, about 10 V, the voltage applied to the relay coil (RL1) 25 also decreases, so that the relay switch RL1 switches to the off-side contact S2, and the LED 2 Connected to the (red) side. Then, a closed circuit connecting the positive terminal of the backup battery 10 to the constant current diode (CRD2), LED2 (red), the power switch 21 and the negative terminal of the backup battery 10 is formed, and the LED2 (red) is lit, and the backup battery 10 is informed that the power supply is disabled (Batt Low). That is, when the voltage of the backup battery 10 is reduced to, for example, about 10 V, the power supply from the backup battery 10 is automatically stopped.

  Next, a case where an external power supply is connected to the power supply device 1 according to the present embodiment and power is supplied to the load device 51 such as an in-vehicle cold storage unit will be described. In this case, the plug cable 41 or the adapter cable 61 is connected to the input connector 22 of the power supply unit 20.

  With the power connector 52 of the load device 51 connected to the output connector 32 of the power supply unit 20 and the plug cable 41 connected to the input connector 22 of the power supply unit 20, the engine switch (IGSW) 44 is first started. Thereby, the voltage from the vehicle-mounted battery 45 is applied to the load device 51 through the line L2 and the line L3.

  A closed circuit is formed from the positive terminal of the in-vehicle battery 45 to the diodes D1 and D2, the relay coil (RL1) 25, the resistor R2, and the negative terminal of the in-vehicle battery 45. A current of 12V from the in-vehicle battery 45 is formed in this closed circuit. Flows. When a voltage of 12 V is applied to the relay coil (RL1) 25, the relay switch RL1 is switched to the on-side contact S1, and is connected to the diodes D3 and D4. At the same time, a closed circuit connecting the positive terminals of the in-vehicle battery 45 to the diodes D1 and D2, the constant current diode (CRD1), LED1 (green) and the negative terminal of the in-vehicle battery 45 is formed, and LED1 (green) that displays the power supply state Lights up.

  When the power switch 21 of the power supply unit 20 is turned on, the positive terminal of the in-vehicle battery 45 is connected to the diodes D1 and D2, the resistor R1, the positive terminal and the negative terminal of the backup battery 10, the power switch 21 and the negative terminal of the in-vehicle battery 45. A circuit is formed, and the backup battery 10 is charged from the in-vehicle battery 45. That is, unless the power switch 21 is turned on, the backup battery charging circuit L5 does not conduct, and the backup battery 10 is not charged.

  As long as the engine is operating, power is supplied from the in-vehicle battery 45 to the load device 51 via the line L2 and the line L3. On the other hand, even if the engine is stopped when the vehicle is parked or stopped, as long as the power switch 21 of the power supply unit 20 is turned on, the resistor R1, the relay coil (RL1) 25, the resistor R2 from the positive terminal of the backup battery 10 A closed circuit connecting the power switch 21 and the negative terminal of the backup battery 10 is formed, and a current of 12 V flows from the backup battery 10 to this closed circuit. Since the voltage applied to the relay coil (RL1) 25 is maintained at 12V, the state where the relay switch RL1 is in contact with the on-side contact S1 is maintained. That is, since the relay switch RL1 is connected to the diodes D3 and D4, the voltage of the backup battery 10 is applied to the load device 51. At the same time, a closed circuit is formed from the positive terminal of the backup battery 10 to the resistor R1, the constant current diode (CRD1), the green LED 1, the power switch 21, and the negative terminal of the backup battery 10, and the LED 1 (indicating the power supply state) The green lighting will continue.

  In this state, if the voltage of the backup battery 10 is lowered to about 10 V, for example, the voltage applied to the relay coil RL1 is also lowered, so that the relay switch RL1 is switched to the off-side contact S2, and LED2 (red) Connected to the side. Then, a closed circuit connecting the positive terminal of the backup battery 10 to the constant current diode (CRD2), LED2 (red), the power switch 21 and the negative terminal of the backup battery 10 is formed, and the LED2 (red) is lit, and the backup battery 10 is informed that the power supply is disabled (Batt Low).

  That is, even if the engine is stopped, power is supplied from the backup battery 10 to the load device 51 for a certain period of time until the voltage of the backup battery 10 drops to about 10V, for example. It will stop automatically.

  Note that, when the adapter cable 61 is connected to the input connector 22 of the power supply unit 20 instead of the plug cable 41 to supply household AC power as an external power supply, the power supply device 1 of the present embodiment is the same as described above. Operates on.

  As described above, according to the portable power supply device 1 according to the present embodiment, the power supply unit 20 connects the input connector 22 and the output connector 32, and loads from an external power supply such as the in-vehicle battery 45 or a household AC power supply. Since the main closed circuit L1 that supplies power to the device 51 and the backup power supply circuit L8 that supplies power from the backup battery 10 to the load device 51 are provided, power can be supplied to the load device 51 by connecting to an external power source. The power can be supplied to the load device 51 alone. Further, since power can be supplied from the backup battery 10 to the load device 51, when connected to the in-vehicle battery 45 through a power socket of an automobile, the engine idling operation is not required to supply power to the load device 51. Even when the engine is stopped, power can be continuously supplied to the load device 51 for a certain period of time.

  The portable power supply device 1 according to the present invention converts various types of load devices such as an air conditioner, an air purifier, a mobile phone, a personal computer, and a shaver by changing the output connector type. It can be used for power supply to.

It is an external appearance block diagram of one Embodiment of the portable power supply device which concerns on this invention. It is a block diagram of the circuit structure of the portable power supply device which concerns on this Embodiment.

Explanation of symbols

1 Portable power supply,
10 Backup battery,
20 power supply unit,
21 Power switch,
22 Input means (input connector),
25 Relay coil (RL1),
32 output means (output connector),
51 load equipment,
RL1 relay switch,
L1 main closed circuit,
L4 relay drive circuit,
L5 backup battery charging circuit,
L6 supply display circuit,
L7 supply impossible display circuit,
L8 Backup power supply circuit.

Claims (5)

A portable power supply device comprising input means connectable to an external power supply, output means connected to a load device, and a backup battery that can be charged by the external power supply,
A main closed circuit for connecting the input means and the output means to supply power from the external power source to the load device;
A backup power supply circuit for supplying power to the load device from the backup battery;
A supply failure display circuit for notifying a power supply impossible state;
A relay drive circuit that selectively switches between the backup power supply circuit and the supply failure display circuit;
A portable power supply device comprising:   A backup battery charging circuit that introduces power from the external power source and charges the backup battery is provided, and the charging circuit forms a closed circuit with the external power source by turning on a power switch. The portable power supply device according to claim 1.   The power supply from the backup battery to the relay drive circuit is supplied even after the positive terminal of the backup battery is connected to the relay drive circuit and power supply from the external power supply is stopped. The portable power supply device according to claim 1 or 2.   The relay drive circuit switches from the backup power supply circuit to a non-suppliable display circuit when the voltage of the backup battery drops to a predetermined voltage, and interrupts the supply of power from the backup battery to the output means. The portable power supply device according to claim 1.   The portable power supply device according to any one of claims 1 to 4, wherein the external power supply is an in-vehicle battery or a household AC power supply.

Images