WO2011159019A2

WO2011159019A2 - Power supply device

Info

Publication number: WO2011159019A2
Application number: PCT/KR2011/003141
Authority: WO
Inventors: 주진관
Original assignee: Ju Jin Gwan
Priority date: 2010-06-16
Filing date: 2011-04-28
Publication date: 2011-12-22
Also published as: WO2011159019A3

Abstract

The present invention relates to a power supply device, and more particularly, to a power supply device having two batteries, wherein the two batteries alternately perform a procedure of supplying most of the battery power to a load, such as a food cart, a vending machine and the like, and supplying a part of the battery power to the other battery to enable the other battery to be charged. According to the present invention, a power supply device comprises: a rechargeable secondary battery and a battery which outputs DC power; an inverter which converts the DC power of the battery into AC power, in which the inverter outputs most of the AC power to a load and outputs a part of the AC power to a charger; the charger which produces a DC voltage with the AC power outputted from the inverter, and charges the battery; a direct current motor interposed between the battery and the inverter and is driven and rotated by an input of DC power; and a power generator which operates by the rotation of the direct current motor and generates electricity, wherein two batteries are equipped, two relays performing different ON/OFF transitions from each other are connected at the rear end of the inverter, thereby alternately repeating an operation in which one battery supplies power to the direct current motor while the other battery is being charged.

Description

Power supply

The present invention relates to a power supply, and more particularly, the process of supplying most of the battery power to a load such as a food stall or a vending machine with two batteries, and partly to another battery so as to recharge the battery. It relates to a power supply which alternately performs in a battery.

In general, food stalls are mobile fast food stands made by forming tent roofs on top of carts, and they are usually installed at streets such as intersections or plazas where people pass frequently, selling simple food or alcoholic beverages. The tastings are quick and simple, and they are installed in various places in many places with many passers-by.

In addition, the vending machine is an unmanned vending machine that stores tea, coffee, cans, toilet paper, cigarettes, etc., puts coins or banknotes, presses a select button, and then automatically discharges the corresponding products. The demand is rapidly spreading.

Vending machines are operated in unmanned sales, which can reduce labor costs, can be installed in narrow places, and are installed in many places because of the convenience of operating regardless of time.

However, because stalls and vending machines are generally installed outdoors due to frequent traffic, it was not easy to supply power to stalls and vending machines.

Therefore, conventionally, an outlet is installed at a point where commercial AC power is supplied, and a plug is inserted into this outlet to extend a separate electric cord connected to the plug to a stall or a vending machine, or a outlet of commercial AC power. B. Because the power was extended to the place where the vending machine was installed, the electric cord was exposed to the outside, which was not good to see and fell down.

In addition, there is a problem that a lot of electricity bills are spent according to the power consumption because it uses a common commercial AC power.

In addition, in the case of food stalls, power was supplied to the food stalls by producing electricity using a car battery and a generator, but there was a problem that the battery could not be used for a long time with one full charge.

Lead acid batteries commonly used as automotive batteries are storage batteries using a reversible electrochemical reaction, using lead peroxide as a positive electrode, lead as a negative electrode, and dilute sulfuric acid as an electrolyte.

In the lead-acid battery, a chemical reaction occurs between the electrode material and the electrolyte during discharge. In the negative electrode, pure lead atoms (Pb) react with sulfate ions (SO ₄ ^2- ) of the electrolyte, and sulfuric acid (H ₂ SO ₄ ) Dissolves in water to form negatively charged sulfate ions and positively charged hydrogen ions (H ⁺ ), and the lead atoms combine with sulfate ions to lose two electrons and lead to lead sulfate (PbSO ₄ ).

As the discharge proceeds, sulfuric acid is consumed and water is formed, and the sulfuric acid is gradually diluted, and both the (-) and (+) electrodes are converted to lead sulfate to decrease the reaction rate.

On the other hand, the car battery expresses the intrinsic power consumption of the battery as the product of the power and the use time, but the actual use of the battery does not use as much as the theoretical use time.

This is because when the car battery is continuously discharged, the positive and negative poles are converted to lead sulfate, which reduces the reaction speed, thereby reducing the efficiency of the battery and using only a fraction of the power consumption of the car battery. to be.

The present invention has been made in order to solve the above problems, by converting the DC power of the battery to AC power by using an inverter, most of them are supplied to the load of the stalls, vending machines, etc. and some are supplied to the charger to charge other batteries By repeating the operation alternately, the battery can be fully charged using commercial AC power, and then the battery can be supplied for a long time using a fully charged battery to a stand or a vending machine. The purpose of the present invention is to provide a power supply that can reduce the consumption of commercial AC power and reduce the cost of using AC power.

It is another object of the present invention that there is no electric cord exposed to the outside by supplying power for a long time to a vending machine or a packaging machi using a charged battery, so it looks good and does not connect or dismantle the electric cord every time the stall is installed or withdrawn. There is no need to provide a convenient power supply.

A power supply device according to the present invention, a rechargeable secondary battery, a battery for outputting a DC power;

An inverter that converts DC power of the battery into AC power, but outputs most of the battery to a load and a portion of the battery to a charger;

A charger for charging a battery by producing a DC voltage with AC power output to the inverter;

A DC motor interposed between the battery and the inverter and driven to rotate by input of a DC power source; And

It includes a generator for generating power by operating by the rotation of the DC motor;

The battery is provided with two, and two relays are switched on and off differently from the rear of the inverter, so that the other battery alternately repeats the operation of supplying power to the DC motor while one battery is being charged. It is characterized by.

According to the present invention, a battery is operated using commercial AC power by alternately repeating an operation of supplying power to a load of a vending machine or a wagon by charging a battery by driving a charger using an inverter at the rear of one battery. After fully charged, this fully charged battery can be used to supply power to stalls and vending machines for a long time, thus reducing the consumption of commercial AC power due to battery full charge using commercial AC power, Reduce costs

In addition, by supplying power to a vending machine or stand for a long time using a charged battery, there is no electric cord exposed to the outside, so it looks good and there is no need to connect or disassemble the electric cord whenever installing or withdrawing the stand. .

1 is a conceptual diagram of a power supply device according to the present invention;

2 is a block diagram of the power supply device shown in FIG.

3 is another block diagram of the power supply device shown in FIG.

10: battery 20: DC motor

30: generator 40: inverter

50: charger 60: switch

70: load 80: relay

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

First, the DC power source and the AC power source will be described for better understanding of the present invention. The AC power source refers to a sin waveform current that regularly changes in magnitude and direction at regular intervals, and the DC power source is different from the AC power source. Contrary to that flows in only one direction without deformation in size and direction.

In the case of the AC power source, it can be widely used as a home appliance or other power source for daily life with a relatively large capacity. However, in the case of the DC power source, since the current is generated from a battery or a battery having a small capacity, each electronic device or a portable device of the vehicle is used. Widely used in

In the case of products powered by AC power, it cannot be used immediately due to lack of capacity of DC power, but it is used through inverter that converts DC power to AC power.

In the case of the inverter, for driving a home appliance such as a television, a VTR, and a notebook computer using a battery of an automobile, an inverter for increasing the capacity is used as a medium.

In other words, when DC power is input to the inverter, it is converted to AC to generate daily AC power such as 220V or 110V so that home appliances can be used.

1 is a conceptual diagram of a power supply apparatus according to the present invention.

As shown, the battery 10 is a secondary battery that can be recharged and repeatedly used, and outputs DC power to the inverter 40.

The inverter 40 converts DC power into AC power, most of which is supplied to the load 70 side, and a part of the inverter 40 is supplied to the charger 50.

The charger 50 generates DC from the AC power of the inverter 40 to charge the battery 10.

FIG. 2 is a block diagram of the power supply device shown in FIG. 1.

As shown, the power supply device includes a battery 10, a DC motor 20, a generator 30, an inverter 40, a charger 50, and a switch 60.

The battery 10 is a rechargeable secondary battery, for example, a secondary battery having a DC 12V capacity, and outputs DC power to a DC motor 20 connected to a rear end thereof.

The DC motor 20 is configured by using a permanent magnet as a stator and using a coil as a rotor (an armature). The rotor rotates by repulsion of magnetic force and suction force by changing the direction of current flowing through the armature.

By the rotation of the DC motor 20, the generator 30 of the rear end is operated to generate a voltage of, for example, DC 13 ~ 14V.

Inverter 40 is an electrical device for converting direct current (DC) into alternating current (AC). The inverter 40 obtains a desired AC voltage and frequency from the DC voltage of the generator 30 through an appropriate conversion method, switching element, or control circuit. In this case, DC 13 ~ 14V is converted to AC 2.5kW power and output.

Some of the AC power generated by the inverter 40, for example, 70W is supplied to the charger 50 to drive the charger 50, whereby the charger 50 generates a DC 13 ~ 14V The battery 10 maintains a DC 12V by charging the connected battery 10.

The charger 50 serves to charge electricity to the battery 10, and charges the battery 10 before the stall or vending machine is installed to charge electricity required for driving the stall or vending machine. .

In this case, the sensor 11 connected to the battery 10 senses the voltage of the battery 10 and displays the voltage state of the battery 10 on the display unit 12, and the user displays the battery 10 displayed on the display unit 12. ) Is normal (i.e., maintaining DC 12V), the switch 60 is electrically turned on between the inverter 40 and the load 70.

Thereby, for example, 0.8-1.2 kW of AC power output by the inverter 40 is supplied to the load 70 of the vending machine or the food stall to preheat the load of the vending machine or the food stall for about 5 minutes. do.

After preheating, the load 70 is supplied with electric power converted to actual power consumption, for example, 300 to 450 W, during preheating of 0.8 to 1.2 kW, which is a switch electrically connected between the inverter 40 and the load 70. It continues until OFF of (60).

Meanwhile, a power extension line (not shown) connected to an external power source to be supplied with power is provided to be supplied with a preliminary power in order to prepare a case in which there is a limit in supplying power with only the battery 10. Can be.

When the battery 10 is fully charged, the AC power supplied to the charger 50 is stopped, or the AC power supplied to the load 70 and the charger 50 is appropriately distributed, or preheated to the load. Control such as converting and supplying the amount of power supplied can be configured by adding a controller (not shown).

Reference numeral 41 connected to the inverter 40 denotes a detection sensor that detects the remaining amount of output power of the

inverter

40, and 42 denotes a maximum output power display unit displaying a case where the power output from the inverter 40 is maximum.

In addition, reference numeral 51 connected to the charger 50 is a detection sensor for detecting a charging state, and 52 is a display unit for checking the charging capacity and the charging state.

3 is another block diagram of the power supply device shown in FIG. 1.

As shown, the power supply includes a

battery

10a, 10b, a DC motor 20, a generator 30, an inverter 40 and a

relay

80a, 80b.

Each of the

batteries

10a and 10b is a rechargeable secondary battery having, for example, a DC 12V capacity, and alternately outputs DC power to the DC motor 20 connected to the rear end.

The + terminal of each of the

batteries

10a and 10b is connected to the + terminal of the DC motor 20, and the-terminal is connected to the position switching terminal of each of the

relays

80a and 80b so that the amount of charge of the

batteries

10a and 10b is increased. Accordingly, the positions are reversed.

When the position switching terminals of the

relays

80a and 80b are switched in opposite directions to each other, when the position switching terminal of one relay 80a is raised to contact the ON contact formed on the relay 80a, The position change terminal of the relay 80b is lowered to contact the OFF contact with the relay 80b.

Here, it is assumed that an ON contact is formed at an upper portion of the

relays

80a and 80b and an OFF contact is formed at a lower portion thereof.

The + terminal of the DC motor 20 is connected to the + terminal of the generator 30, and the − terminal is connected to, for example, the 0N contacts of the

respective relays

80a and 80b.

The negative terminal of the generator 30 is connected to the OFF contact of each

relay

80a, 80b, for example.

Inverter 40 is an electrical device for converting a direct current into an alternating current. The inverter 40 obtains a desired voltage and frequency from the DC voltage of the generator 30 through an appropriate conversion method, switching element, or control circuit. Converts to kW power and outputs.

The negative terminal of the inverter 40 is connected, for example, to another ON voltage of each of the

relays

80a and 80b.

Of course, the inverter 40 is also connected to the load 70 as shown in FIG. 2, so that most of the AC power generated by the inverter 40 is supplied to the load 70, and some of the

relays

80a and 80b are provided. It is supplied to the charger 50 through.

As such, the ON contact of each of the

relays

80a and 80b is connected to the-terminal of the inverter 40 and the DC motor 20, the OFF contact is connected to the-terminal of the generator 30, and the position change terminal is connected to the battery ( Connected to the negative terminals of the

terminals

10a and 10b, and the position switching terminals alternately switch positions in opposite directions depending on the amount of charge of the

batteries

10a and 10b or a predetermined time to contact the ON contact of one relay 80a. The other relay 80b is in contact with the OFF contact.

Therefore, while one battery 10a is charged through the charger 50 by the ON contact connection of one relay 80a, the power of the other battery 10b is turned off by the OFF contact connection of the other relay 80b. It is supplied to the DC motor 20.

On the contrary, when one relay 80a is in contact with the OFF contact, the other relay 80b is in contact with the ON contact, and the battery 10b is charged while the power of the battery 10a is supplied to the DC motor 20. Done.

In this case, the ON / OFF switching time difference between the relays 80a and 80n is preferably 0.04 to 0.12 seconds in that the DC motor 20 can be supplied without power.

As described above, one battery (for example, 10a) is repeatedly supplied by using two

batteries

10a and 10b to supply power to another battery (for example, 10b) while charging the battery 10. It is possible to supply power to a stand or vending machine for a long time rather than connecting two and using it without charge (continuous discharge).

This result is due to the decrease in the rate at which the positive and negative poles change in the process of repeating charging and discharging, thereby gradually decreasing the efficiency of the battery and thus allowing the capacity of the original battery to be used more than that during continuous discharge. .

In other words, the present invention does not increase the amount of power stored in the battery, but instead has a charger and a relay to charge and discharge alternately, so that the amount of power stored in the original battery can be used more than in continuous discharge, and thus can be used as a full charge of a battery. You can increase your time.

In this way, after the two batteries are fully charged using the commercial AC power of a general household, the usage time of the battery that can be used without an external power source is increased, thereby reducing the number of times the battery is fully charged, thereby reducing the consumption of commercial AC power. Reduce costs.

Claims

A rechargeable battery comprising: a battery for outputting a DC power source;

An inverter that converts DC power of the battery into AC power, but outputs most of the battery to a load and a portion of the battery to a charger;

A charger for charging a battery by producing a DC voltage with AC power output to the inverter;

A DC motor interposed between the battery and the inverter and driven to rotate by input of a DC power source; And

It includes a generator for generating power by operating by the rotation of the DC motor;

The battery is provided with two, and two relays are switched on and off differently from the rear of the inverter, so that the other battery alternately repeats the operation of supplying power to the DC motor while one battery is being charged. Power supply characterized in that.
The method of claim 1,

The ON contact of each relay is connected to the-terminal of the inverter and the DC motor, the OFF contact is connected to the-terminal of the generator, and the position change terminal which is switched in the opposite direction to contact the ON contact or the OFF contact is A power supply, characterized in that connected to the negative terminal of the battery.
The method of claim 1,

ON / OFF switching time difference between the relay is a power supply characterized in that 0.04 ~ 0.12 seconds.
The method of claim 1,

The battery is connected to a detection sensor for detecting the voltage of the battery, and a display unit for displaying the battery voltage state detected by the detection sensor, the switch is electrically connected between the inverter and the power supply,

And a switch is turned on to supply AC power to the load when the voltage state displayed on the display unit is confirmed to be normal.
The method of claim 1,

The inverter is connected to a detection sensor for detecting the remaining output power of the inverter, and a display unit for displaying the maximum output power output from the inverter,

The charger is connected to a sensing sensor for detecting a charge state, and a display unit for displaying the charge capacity and the charge state is connected to the power supply.
The method of claim 1,

And a power extension line connected to an external power source to be supplied with power so that the battery is supplied with the reserve power.