KR200369823Y1 - Apparatus of portable AC power supply - Google Patents

Abstract

The present invention relates to a portable AC power supply. According to the present invention, the housing; A battery body mounted inside the housing and provided with a positive terminal and a negative terminal; A connection jack connecting the battery body to the outside; An inverter connected to the battery main body through the positive terminal and the negative terminal and integrally mounted in the housing, and receiving DC power of the battery and converting the battery into a predetermined AC power; And an output terminal connected to the inverter and outputting the converted AC power. As a result, the electronic device configured to be used by applying an AC power supplied to a general home can be used freely while being carried outdoors.

Description

Portable AC power supply {Apparatus of portable AC power supply}

The present invention relates to a power supply device, and more particularly, to a portable AC power supply device for providing an AC power source for convenient use while carrying a variety of electronic devices designed for home use.

Direct current (DC) is a current flowing from a positive direction to a negative electrode at all times while maintaining a constant voltage. The positive and negative poles are maintained. In contrast, alternating current (AC) is a current in which the direction of flow changes periodically with time, with the + and-poles periodically changing. When producing electricity, alternating current is produced by using a method using a commutator. The alternating current produced is mainly used for transmission because it is advantageous for boosting and depressurizing to reduce transmission loss and to prevent arc discharge.

However, since DC is superior to AC in efficiency, DC is often used when actually using electronic devices. Therefore, in general households, when electricity is supplied in the form of alternating current and applied to an electronic device, it is converted into a direct current inside the electronic device. In other words, the alternating current applied from the transformer inside the electronic device is lowered to an appropriate voltage, and then converted into a direct current through a diode and a capacitor.

On the other hand, when using the electronic device while using a battery in general, the battery is a battery that is repeated charging and discharging is also called a storage battery or a secondary battery. Discharge refers to a state in which chemical energy is converted into electrical energy, and charging refers to a state in which electrical energy is supplied from another power source and converted into chemical energy and accumulated. In other words, the battery is composed of a positive and negative electrode plate and an electrolyte, which is a device that can be used as a power source while generating a DC electromotive force by the chemical action of charging and then discharge. Batteries are produced in a variety of functional forms by the development of electronic components and the development of control technology.

In general, the battery is charged using a charger provided separately, and is connected to a predetermined electronic device or mounted in a storage space provided in the electronic device. Then, the charged power is discharged and the electronic device can be used.

However, since the battery is a power source using direct current, it is difficult to connect directly to an electronic device designed to be converted into direct current in the device by receiving alternating current, which is a form of supplying electricity at home. Therefore, it should be converted to AC using an inverter except when it is stored in some electronic device which uses DC power directly.

In the case of using the electronic device while carrying the electronic device, it is inconvenient to use the electronic device freely by using the battery in the outdoors because the battery must be charged with a separate charger and then a separate inverter.

The present invention was devised to solve the above problems, and the object of the present invention is to provide a portable AC power supply device that can be used freely while carrying an electronic device used outdoors by applying AC power at home. have.

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the present invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a perspective view showing a schematic configuration of a portable AC power supply device according to an embodiment of the present invention.

Figure 2 is a block diagram showing a schematic configuration of a portable AC power supply according to an embodiment of the present invention.

3 is a circuit diagram of an inverter employed in accordance with a preferred embodiment of the present invention.

Figure 4 is a block diagram showing a schematic configuration of a portable AC power supply according to another embodiment of the present invention.

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

110.Housing 120.Battery body

130 ... Connection jack 140 ... Inverter

150 ... Output terminal 160 ... Over discharge protection circuit

170.Charging circuit

Portable AC power supply according to the present invention for achieving the above object, the housing; A battery body mounted inside the housing and provided with a positive terminal and a negative terminal; A connection jack connecting the battery body to the outside; An inverter connected to the battery main body through the positive terminal and the negative terminal and integrally mounted in the housing, and receiving DC power of the battery and converting the battery into a predetermined AC power; And an output terminal connected to the inverter and outputting the converted AC power.

Preferably, the output terminal is at least one, 110V, 220V or a combination thereof.

According to the present invention, the portable AC power supply may further include an over-discharge prevention circuit electrically connected to the battery body and integrally mounted in the housing.

According to the present invention, the portable AC power supply may further include a charging circuit interposed between the battery body and the connection jack integrally mounted in the housing.

Preferably, the over-discharge prevention circuit is electrically connected to the battery body and mounted inside the housing; And a charging circuit interposed between the battery body and the connection jack and mounted inside the housing.

On the other hand, the battery is preferably mounted to be detachable from the housing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors will properly describe the concept of terms in order to best explain their own design. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a perspective view showing a schematic configuration of a portable AC power supply according to an embodiment of the present invention, Figure 2 is a schematic configuration of a portable AC power supply according to an embodiment of the present invention This is a block diagram.

1 and 2, the portable AC power supply device according to the present invention includes a housing 110. The housing 110 serves as a case for embedding various components constituting the AC power supply device is preferably configured to be open.

Outside the housing 110 may be provided with a switch 111 to control the on / off state of the AC power supply.

The battery body 120 is installed inside the housing 110. The battery main body 120 generally uses a conventional storage battery or a secondary battery to repeat the charging that changes and accumulates the chemical energy into electrical energy by supplying electrical energy from a discharge that changes chemical energy into electrical energy. According to the use of the AC power supply can be variously adopted, preferably lead acid battery can be adopted.

On the other hand, the battery body 120 is provided with a positive terminal and a negative terminal 121 and 122 to be electrically connected to other components.

Preferably, the battery body 120 is configured to be detachable from the housing 110. Therefore, when the service life of the battery main body 120 runs out, it can be easily removed from the housing 110 and replaced with a new battery main body while continuing to perform the function of the AC power supply as it is. In addition, when the amount of charge of the battery body 120 is not sufficient for the amount of electricity required for the operation and the charging standby time is not enough to use another pre-charged battery body can easily replace the battery body 120.

According to the present invention, the AC power supply device includes a connection jack 130 for connecting the battery body 120 to the outside. The connection jack 130 is a terminal for connecting the battery main body 120, which is a secondary battery, for example, with a separate charger to enable charging.

According to the present invention, the inverter 140 is electrically connected to the positive terminal and the negative terminal 121 and 122 of the battery body 120. That is, the battery body 120 and the inverter 140 are integrally connected and mounted in the housing 110.

The inverter 140 is a device for converting a DC power into an AC power. To explain a basic principle, an inverter drives a control circuit using an input voltage, and the control circuit choppers the input power at a high frequency to interrupt the interrupted voltage. Is applied to an inverter transformer (high frequency transformer) to obtain the desired AC power output.

Various conventional techniques may be employed for the inverter 140. FIG. 3 shows a circuit diagram of an inverter employed according to a preferred embodiment of the present invention.

Referring to FIG. 3, the inverter 140 includes an oscillator 141 for generating an oscillation signal having a predetermined frequency, a switching element 142 for switching a DC voltage applied to the primary winding 143a according to the oscillation signal, and And a power supply transformer 143 having a primary winding 143a and a multi-tap secondary winding 143b. Although the specific configuration of the inverter 140 is disclosed in the present embodiment, the present invention is not limited thereto, and it should be understood that various modifications of the inverter 140 for converting DC power into AC power may be employed.

The AC power supply device according to the present invention includes an output terminal 150 connected to the inverter 140 to output the converted AC power.

Preferably at least one output terminal 150 may be provided. The plurality of output terminals 150 may be 110V 151, 220V 152, or a combination thereof. Thus, by providing a plurality of 220V output terminal 152 mainly used as a home power supply in Korea, it is possible to use several electronic devices at the same time. If 110V electronics are used, it is also possible to provide an output terminal 151 of 110V in an AC power supply according to the present invention. It is to be understood that the voltage of the AC power supply is not limited to the above specific embodiments and various modifications may be employed as necessary.

Hereinafter, the operation of the portable AC power supply having the configuration as described above.

First, a separate charger (not shown) is connected to the connection jack 130 to charge the battery body 120 provided in the AC power supply. After being charged, a power source of an electronic device, for example, a hair dryer or a notebook, to be used is connected to the output terminal 150 according to a predetermined AC voltage.

Thereafter, the switch 111 provided outside the housing 110 is turned on. Then, the DC voltage charged in the battery body 120 is converted into AC power through the inverter 140.

Looking at the operation of the inverter 140, a DC voltage is applied to the internal switching element 142. When the power source is turned on, the oscillator 141 oscillates a high frequency signal of a predetermined frequency and the oscillation signal is applied to the switching element 142. The switching element 142 is turned on / off according to the oscillation signal and converts the DC signal into a high frequency AC signal and applies it to the primary winding 143a of the power transformer 143. Then, the power supply transformer 143 receives the voltage altered by the switching element 142 into the primary winding 143a and induces the secondary winding 143b having a predetermined turns ratio.

At this time, the secondary winding 143b having a predetermined number of output taps outputs an alternating current according to the turns ratio, for example, 110V, 220V, or a combination thereof.

Alternatively, the secondary winding 143b having the multi-tap may be configured of a plurality of secondary windings to output various AC voltages.

By using the AC voltage output as described above, various electronic devices can be freely used not only at home but also outdoors without power.

4 is a block diagram schematically illustrating a portable AC power supply device according to another embodiment of the present invention. In FIG. 4, the same reference numerals as in the above-described drawing indicate the same members having the same function.

Referring to FIG. 4, the portable AC power supply device according to the present invention may further include an over-discharge prevention circuit 160 that is integrally connected to the battery body 120 and mounted inside the housing 110.

When the over-discharge prevention circuit 160 continues to use even when the discharge of the battery main body 120 is completed (below a prescribed voltage), gas is generated by a chemical reaction inside the battery main body 120, thereby It is to prevent shortening the life.

For example, the over-discharge prevention circuit 160 may adopt a configuration in which the transistor and the relay are connected by connecting the transistor and the relay to stop the operation of the transistor and the relay by stopping the operation when the battery body 120 is discharged below a specified voltage. However, the over-discharge prevention circuit 130 is not limited to the above configuration and various conventional techniques may be employed in various modifications by those skilled in the art within the scope for achieving the object of the present invention.

More preferably, the portable AC power supply device according to the present invention may be further provided with a charging circuit 170 connected to the battery body 120 and integrally mounted inside the housing 110.

The charging circuit 170 is a circuit in which a plurality of diodes and transistors are provided, and a plurality of diodes and transistors are charged by applying an applied power to perform a continuous operation. Thus, only the power source may be connected without a separate external charger for charging the battery body 120.

For example, the charging circuit 170 may include a resistor and a voltage / current control transistor serving as a current sensor at a power input terminal centered on a microprocessor that controls a charging voltage. When the charging power is connected, the microprocessor controls the charging current of the battery main body 120 by controlling the amplification degree of the transistor according to the check voltage level of the resistor which is the current sensor, and detects the temperature of the charging battery main body 120 It can be configured to limit the charging. However, it is to be understood that the charging circuit 170 is not limited thereto and may be employed in various modifications by those skilled in the art within the scope for achieving the object of the present invention.

The operation of the portable AC power supply device having the above configuration will be described.

First, an external power source is connected to the connection jack 130 to charge the battery body 110. At this time, since charging is performed through the charging circuit 170, only a power source is required without a separate charger.

When charging is completed, the predetermined electronic device is connected to the output terminal 150 and the switch 111 is turned on. When the switch 111 is turned on, the DC power charged in the battery main body 120 is converted into AC power in the same manner as the operation of the inverter 140 described above, and the electronic device may be operated using the AC power.

Meanwhile, the battery main body 120 is discharged while operating the electronic device. At this time, the battery main body 120 may be discharged to a reference voltage while the battery main body 120 is discharged. Then, the over-discharge prevention circuit 160 is operated so that the discharge is not excessively controlled to prevent damage to the battery body 120.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

As described above, the portable AC power supply device according to a preferred embodiment of the present invention allows to use freely while carrying an electronic device configured to be used by applying AC power supplied to a general home. This makes it possible to conveniently use the electronic device without providing an adapter or an inverter.

Claims (6)

housing; A battery body mounted inside the housing and provided with a positive terminal and a negative terminal; A connection jack connecting the battery body to the outside; An inverter connected to the battery main body through the positive terminal and the negative terminal and integrally mounted in the housing, and receiving DC power of the battery and converting the battery into a predetermined AC power; And Portable AC power supply comprising a; output terminal for outputting the converted AC power connected to the inverter. The method of claim 1, The output terminal is at least one, portable AC power supply, characterized in that 110V, 220V or a combination thereof. The method of claim 1, And an overdischarge prevention circuit electrically connected to the battery body and integrally mounted in the housing. The method of claim 1, And a charging circuit interposed between the battery main body and the connection jack and integrally mounted in the housing. The method of claim 1, An over-discharge prevention circuit electrically connected to the battery body and mounted in the housing; And And a charging circuit interposed between the battery main body and the connection jack and mounted inside the housing. The method according to claim 1, wherein And the battery is mounted to be detachable from the housing.