JP2011097681A - Power supply system of electric device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further reduce the size and weight of an electric device body, capable of output of high power, and to perform a quick charge operation of the electric device body, in a power supply system of an electric device. <P>SOLUTION: The power supply system of the electric device is composed of the electric device A having the electric device body 7 and a power supply unit 8, and a charger B for charging the power supply unit 8. The power supply unit 8 of the electric device A is of a pack type which is removable with respect to the electric device body 7, and contains a capacitor 2 as an element 3 to be charged. The charger B contains a charger-side accumulator 14 being the element 3 to be charged and a power supply part 4 for charging the accumulator. Then, when the power supply unit 8 is connected to the charger B, a current is fed to the capacitor 2 in the power supply unit 8 from the charger-side accumulator 14, and the power supply unit 8 is charged. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply system for an electric device.

  A conventional power supply system for an electric device is disclosed in Patent Document 1. In this electric device, a charged element and a power supply circuit including a storage battery and a capacitor are provided in an electric device main body which is a portable electric tool.

  In normal operation, the capacitor is charged by supplying current from the storage battery, and in use, the switch is turned on to supply current from the capacitor to the motor to drive the electric device body. According to this electric device, a large power can be output by the capacitor.

  However, since this electric device has a structure in which a storage battery, a capacitor, a power supply circuit, etc. are all built in the electric device main body, there is a problem that the entire device becomes larger and heavier.

JP 2003-48177 A

  The present invention has been invented in view of the above-described problems. In the power supply system for an electric device, the electric device main body capable of outputting a large amount of power is reduced in size and weight, and the electric device main body is quickly charged. The task is to make it complete.

  The present invention that solves the above-described problems is a power system for an electric device that includes an electric device A having an electric device main body 7 and a power supply unit 8 and a charger B that charges the power supply unit 8. The power supply unit 8 of the electric device A is of a pack type that is detachable from the electric device main body 7 and has the capacitor 2 built in as the charged element 3. The charger B includes a charger-side storage battery 14 that is a charged element 3 and a power supply unit 4 for charging the battery. When the power supply unit 8 is connected to the charger B, a current is supplied from the charger-side storage battery 14 to the capacitor 2 in the power supply unit 8 to charge the power supply unit 8.

  As described above, the charged element 3 for the power supply system includes the capacitor 2 built in the detachable power supply unit 8 on the electric device A side and the charger side storage battery 14 built on the charger B side. Thus, in the electric device A, the electric device main body 7 can be driven with a large output by the capacitor 2, and the power supply unit 8 only needs to incorporate the capacitor 2, so that the entire device is reduced in size and weight. The usability is also improved. In addition, it becomes easy for the user to carry a plurality of small and lightweight power supply units 8 and use the electric device A for a long time. When charging, a large current is supplied from the charger side storage battery 14 already charged in the charger B to the capacitor 2 at once, and the charging operation can be completed in a short time.

  Further, in the present invention having the above-described configuration, the charger B is configured such that a storage battery unit b1 containing a charger-side storage battery 14 and a power supply unit b2 containing a power supply unit 4 are detachably connected. Is preferred. In this way, first, the charger-side storage battery 14 is charged in a state where the storage battery unit b1 on the charger B side and the power supply unit b2 are connected, and after the charging is completed, the storage battery unit b1 is removed and carried. Thus, the capacitor 2 can be charged by being connected to the power supply unit 8. That is, by providing the storage battery unit b1 and the power supply unit b2 in a detachable manner, a place where the charger side storage battery 14 is charged and a place where the capacitor 2 of the power supply unit 8 is charged are provided separately. Can do.

  In the present invention, it is preferable that the power supply unit 4 supplies a current from the provided fuel cell 25 to the charger-side storage battery 14. In general, the fuel cell 25 has a small current output, but the charger side storage battery 14 is charged by the fuel cell 25 on the charger B side over a certain period of time, and then the charger side storage battery is charged. By charging the capacitor 2 of the power supply unit 8 with the current output from 14, the charging operation of the power supply unit 8 can be completed in a short time. That is, even if it is the structure which used the fuel cell 25 for the charger B, the charge operation | work to the power supply unit 8 can be completed rapidly.

  In the present invention, the electric device A is also preferably an electric tool provided with the power supply unit 8 in a detachable manner. In this way, it is possible to provide a power tool that can output a large amount of power as a compact, lightweight and easy-to-use tool, and the power tool unit 8 can be charged in a short time. It becomes possible.

  In the present invention, the power unit of the electric device is a detachable pack type with a built-in capacitor, the charger has a built-in charger side storage battery and a power supply unit, and the power unit is connected to the charger. Then, it provided so that an electric current might be supplied from the charger side storage battery with respect to the capacitor | condenser in a power supply unit. Thereby, although it is large output, it can be set as a small and lightweight electric device, and also there exists an effect that the quick charge operation | work of an electric device is also attained.

  In addition, since the battery charger unit and the power supply unit are detachably connected to each other, there is an effect that a place where the charging operation is performed can be selected with a high degree of freedom.

  In addition, by providing the power supply unit with current from the provided fuel cell to the charger side storage battery, the charger using the fuel cell can quickly complete the charging operation to the power unit. The effect of becoming.

  Further, by making the electric device an electric tool having a detachable power supply unit, it is possible to provide a high-power, small, and lightweight electric tool that can be charged in a short time. There are effects such as.

The power supply system of the electrically-driven apparatus of the 1st example in embodiment of this invention is shown, (a) is a side view of an electrically-driven apparatus main body, (b) is a perspective view of a power supply unit, (c) is a perspective view of a charger. . It is sectional drawing of a power supply unit same as the above. It is a circuit diagram of a power supply unit and a charger same as the above. It is a perspective view of the charger which comprises the power supply system of the electric device of the 2nd example in embodiment of this invention. It is a circuit diagram of a power supply unit and a charger same as the above. It is a circuit diagram of the power supply unit and charger which comprise the power supply system of the electrically-driven apparatus of the 3rd example in embodiment of this invention. The power supply system of the electric device of the 3rd example in the embodiment of the present invention is shown, (a) is a side view of an electric device, and (b) is a perspective view of a charger.

  The present invention will be described based on embodiments shown in the accompanying drawings. FIG. 1 shows a first example of the electric device A and the charger B in the embodiment of the present invention.

  The electric device A includes an electric device main body 7 that is a portable electric tool and a pack-type power supply unit 8 that is detachably attached to the electric device main body 7. The electric device main body 7 is as shown in FIG. 1 (a). A handle portion 10 is extended from a cylindrical body portion 9 incorporating a motor and a power transmission mechanism in a direction substantially orthogonal thereto, and the handle portion 10 is provided. A trigger switch 5 that can be retracted is provided. The power supply unit 8 is detachably attached to the handle portion 10.

  The power supply unit 8 has a box shape as shown in FIG. 1B, and projects a connecting portion 11 inserted into the handle portion 10 into a columnar shape when mounted. A connection terminal 6 that is electrically connected to a circuit in the electric device main body 7 is provided at the tip of the connection portion 11. The charger B is a box type as shown in FIG. 1C, and is provided with a connection hole 12 into which the connection portion 11 of the power supply unit 8 is inserted during charging. In the connection hole 12, the connection terminal 1 electrically connected to the connection terminal 6 of the connection part 11 is provided.

  Hereinafter, the structure of the power supply unit 8 and the charger B which charges this is demonstrated based on the circuit diagram of FIG.

  The power supply unit 8 includes a capacitor 2 as a charged element 3 for driving the electric device main body 7. In particular, the capacitor 2 is preferably an electric double layer capacitor (see FIG. 2). In this case, higher energy density and power storage efficiency can be obtained.

  The charger B includes a power supply circuit 13 that operates by inputting the commercial power supply 30, a charger-side storage battery 14 that is charged by the power supply circuit 13, a temperature sensor 15 that detects the temperature of the charger-side storage battery 14, and charging A charge control circuit 16 that performs charge control while monitoring the voltage and temperature of the charger-side storage battery 14, a backflow prevention diode 17 and a current limiter that are interposed between the capacitor 2 and the charger-side storage battery 14 when the power supply unit 8 is connected. A circuit 18 is incorporated.

  In the battery charger B of the first example having the above-described configuration, the commercial power supply 30 is connected to the power supply circuit 13 by connecting the plug 19 (see FIG. 1C) provided in the battery charger B to an outlet at normal times. Keep connected. At this time, a closed circuit 40 that connects the commercial power supply 30 and the charger-side storage battery 14 in series via the power supply circuit 13 is formed. The power supply circuit 13 is controlled by the charge control circuit 16 so as to supply the current from the commercial power supply 30 to the charger-side storage battery 14.

  The charge control circuit 16 is connected to the closed circuit 40 so as to be in parallel with the charger-side storage battery 14, and further connected to the temperature sensor 15 and the power supply circuit 13. The charging control circuit 16 detects the voltage of the charger-side storage battery 14 and appropriately charges the charger-side storage battery 14 while detecting the temperature of the charger-side storage battery 14 based on the output from the temperature sensor 15. Thus, the power supply circuit 13 is controlled.

  That is, in the charger B, the power supply circuit 4 for charging the charger-side storage battery 14 by supplying current is formed by the power supply circuit 13, the temperature sensor 15, and the charge control circuit 16.

  When charging the power supply unit 8 of the electric device A, the connection portion 11 of the power supply unit 8 removed from the electric device main body 7 is inserted into the connection hole 12 of the charger B, and the capacitor 2 built in the power supply unit 8 The charger-side storage battery 14 built in the charger B is electrically connected. At this time, a closed circuit 50 is formed in which the charger-side storage battery 14, the current limiting circuit 18, the backflow prevention diode 17, and the capacitor 2 are connected in series in this order. The capacitor 2 in the power supply unit 8 is supplied with current from the charger side storage battery 14 via the current limiting circuit 18 and the backflow prevention diode 17.

  When charging of the capacitor 2 is completed, the power supply unit 8 may be removed from the charger B, and the power supply unit 8 after completion of charging may be attached to the electric device main body 7. In the electric device A equipped with the power supply unit 8 after completion of charging, the electric device main body 7 can be driven by supplying current from the capacitor 2.

  Thus, according to the power supply system of the first example, the electric device A can be driven with a large power by the capacitor 2 included in the power supply unit 8, and the capacitor 2 is connected to the power supply unit 8 as the charged element 3. Since it only needs to be built in, the entire apparatus can be reduced in size and weight.

  Further, since the pack-type power supply unit 8 is reduced in size and weight, the user can easily carry a plurality of charged power supply units 8. When a plurality of power supply units 8 are carried in this way, the small and lightweight electric device A can be used for a long time with a large output.

  Furthermore, when charging, a large current can be supplied to the capacitor 2 from the charger side storage battery 14 already charged on the charger B side. Therefore, the charging operation of the capacitor 2 in the power supply unit 8 can be completed in a short time without increasing the output current capability of the power supply circuit 13 too much.

  Next, a second example of the electric device A and the charger B in the embodiment of the present invention will be described with reference to FIGS. 4 and 5. Since the basic configuration of the present invention is the same as the configuration of the first example described above, the detailed description of the configuration similar to the first example is omitted, and only the characteristic configuration different from the first example is described. This will be described in detail below.

  In the second example, as shown in the figure, the charger B is further divided into two units to be detachable. Specifically, the charger B is separately formed into a storage battery unit b1 and a power supply unit b2, and both units b1 and b2 are detachably connected via a connection cord 20. The storage battery unit b1 is a block that incorporates the charger-side storage battery 14, the backflow prevention diode 17, and the current limiting circuit 18, and the power supply unit b2 is a block that incorporates the power supply unit 4 for charging the charger-side storage battery 14. It is.

  In the power supply system of the second example configured as described above, when charging the power supply unit 8 of the electric device A, first, the storage battery unit b1 and the power supply unit b2 on the charger B side are set in a connected state, and the commercial power supply 30 Is supplied to the charger side storage battery 14 in the storage battery unit b1 from the power supply unit b2 to charge the charger side storage battery 14.

  After the charging of the charger-side storage battery 14 is completed, the storage battery unit b1 is removed from the power supply unit b2, and only the storage battery unit b1 is carried to another place, and the power supply unit 8 and the storage battery unit b1 are connected at the other place. The capacitor 2 can be charged.

  Thus, by providing the storage battery unit b1 and the power supply unit b2 in a detachable manner, the distance between the place for installing the power supply unit b2 where the outlet of the commercial power supply 30 is provided and the place where the power supply unit 8 is charged is a distance. It can be set in different places separated by. Therefore, the power supply unit 8 can be charged in a free place without being restricted by the presence or absence of facilities such as the commercial power supply 30.

  Next, a third example of the electric device A and the charger B in the embodiment of the present invention will be described with reference to FIG. Since the basic configuration of the present invention is the same as the configuration of the first example described above, the detailed description of the configuration similar to the first example is omitted, and only the characteristic configuration different from the first example is described. This will be described in detail below.

  The charger B of the third example has a structure in which a fuel cell 25 is arranged instead of the power supply circuit 13 provided to be connected to the commercial power source 30 in the first example. That is, the battery charger B monitors the voltage and temperature of the fuel cell 25, the charger-side storage battery 14 charged with the current supplied from the fuel cell 25, the temperature sensor 15, and the charger-side storage battery 14. A charge control circuit 16 that controls the fuel cell 25, a backflow prevention diode 17, and a current limiting circuit 18 are incorporated.

  In the charger B, a closed circuit 60 that connects the fuel cell 25 and the charger side storage battery 14 in series is formed. The charge control circuit 16 is connected to the closed circuit 60 so as to be in parallel with the charger-side storage battery 14, and further connected to the temperature sensor 15 and the fuel cell 25. The charging control circuit 16 detects the voltage of the charger-side storage battery 14 and appropriately charges the charger-side storage battery 14 while detecting the temperature of the charger-side storage battery 14 based on the output from the temperature sensor 15. Thus, the fuel cell 25 is controlled.

  According to the charger B of the third example configured as described above, the charger-side storage battery 14 can be charged using the built-in fuel cell 25 without using an external power source such as the commercial power source 30. In general, the fuel cell 25 has a small current output, and if the power source unit 8 is directly charged by the fuel cell 25, it takes a long time to complete charging. On the other hand, in the third example, charging of the charger side storage battery 14 is completed by taking a certain amount of time by the current output of the fuel cell 25 on the charger B side, and then from the charger side storage battery 14. With this current output, the capacitor 2 of the power supply unit 8 can be charged in a short time.

  FIG. 7 shows a modification of the present invention. This modification is an example in which the detachable pack-type power supply unit 8 is not provided in the power supply system shown in the first example, but the capacitor 2 is integrated with the electric device main body 7. When charging, the handle 10 of the electric device main body 7 is directly inserted into the charger B, and the capacitor 2 built in the electric device main body 7 and the charger side storage battery built in the charger B are connected via the connection terminal 1. 14 is electrically connected.

  The present invention has been described above based on the embodiments shown in the accompanying drawings. However, the present invention is not limited to the embodiments of the above-described examples, and may be appropriately used in each example as long as it is within the intended scope of the present invention. It is possible to change the design of the above and to apply a combination of the configurations of the examples as appropriate.

DESCRIPTION OF SYMBOLS 2 Capacitor 3 Power-receiving element 4 Power supply part 7 Electric apparatus main body 8 Power supply unit 14 Charger side storage battery 25 Fuel cell A Electric apparatus B Charger b1 Storage battery unit b2 Power supply unit

Claims (4)

  An electric apparatus power supply system comprising an electric apparatus main body and an electric apparatus having a power supply unit, and a charger for charging the power supply unit, wherein the electric power supply unit is detachable from the electric apparatus main body and It is a pack type with a built-in capacitor as an element to be charged, and the charger has a built-in charger-side storage battery that is the element to be charged and a power supply unit for charging this, and charges the power supply unit. A power supply system for an electric device, characterized in that when connected to a charger, current is supplied from a charger-side storage battery to a capacitor in the power supply unit to charge the power supply unit.   2. The power supply system for an electric device according to claim 1, wherein the charger is a detachable connection of a storage battery unit containing a charger-side storage battery and a power supply unit containing a power supply unit. .   The power supply system for an electric device according to claim 1 or 2, wherein the power supply unit supplies a current from a fuel cell provided to the charger-side storage battery.   The power supply system for an electric device according to any one of claims 1 to 3, wherein the electric device is an electric tool that is detachably provided with a power supply unit.

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