WO2012148028A1

WO2012148028A1 - Apparatus for charging battery

Info

Publication number: WO2012148028A1
Application number: PCT/KR2011/003308
Authority: WO
Inventors: 임재용
Original assignee: Im Jae Yong
Priority date: 2011-04-28
Filing date: 2011-05-03
Publication date: 2012-11-01

Abstract

The object of the present invention is to provide an apparatus for charging a battery, which can prevent damage to the battery due to abnormal charge shutdown and increase battery regeneration efficiency, by stably supplying a constant current for several seconds to the battery being charged when charging is abnormally shutdown, as in the case of a power outage, so that the charge shutdown is completed in a normal and stable manner. To this end, the apparatus for charging the battery, according to the present invention, comprises: an input end for receiving an AC voltage from the exterior; a converter for outputting the AC voltage as a DC voltage; a DC filter for filtering the DC voltage; a DC/AC converter for converting the AC voltage that is filtered into the DC; a transformer for adjusting the converted DC voltage; an AC/DC converter for converting the DC voltage that is outputted by the transformer into the AC voltage; an output end for outputting the AC voltage, which is converted by the AC/DC converter, to the battery so as to charge the battery; and a microcomputer for controlling the voltage so that a constant voltage and a current flows between the DC filter and the AC/DC converter, wherein the DC/AC converter provides a remaining DC voltage to the transformer during a power outage, by means of the control by the microcomputer, so as to stably complete the charging.

Description

Battery charger

The present invention relates to a battery charging device, and more particularly, to a battery charging device that can be used to make the end of the charging stable by using the remaining voltage remaining in the circuit even in the case of power failure.

In general, a battery used in a car or a mobile phone uses a DC voltage. At this time, such a battery is usually discharged by using a power source, when a certain amount is discharged to use the charging device.

Since the conventional charging device adopts a method of receiving an AC voltage, converting it into a DC voltage, and then immediately supplying and charging the battery, the following problem occurs.

1) If the AC voltage, which is an external power source, is suddenly cut off due to a power failure while charging the battery, the charge to the battery is cut off immediately. As such, when the charging is abnormally terminated, the battery is shocked, which causes the battery to break.

2) In particular, the breakage of the battery acted as a factor in reducing the charging efficiency when the battery is recharged again. This shortened the replacement cycle of the battery.

3) The deterioration of the charging efficiency of the battery has caused a lot of economic damage.

The present invention has been made in view of this point, and when charging is abnormally terminated, such as a power failure, by using a residual voltage to supply a constant current to the battery for a few seconds during charging, the charging end is configured to be completed normally and stable By doing so, it is an object of the present invention to provide a battery charging device that not only prevents damage to the battery caused by abnormal end of charging, but also increases the regeneration efficiency of the battery.

Battery charging apparatus according to the present invention for achieving this object, the input terminal for receiving an AC voltage from the outside; A converter for outputting an AC voltage as a DC voltage; DC filter for filtering the DC voltage; A DC / AC converter for converting the filtered DC voltage into AC; A transformer for regulating the converted AC voltage; An AD / DC converter for converting an AC voltage output from a transformer into a DC voltage; An output stage for outputting the DC voltage converted from the AD / DC converter to a battery for charging; And a microcomputer that controls a voltage to allow a constant voltage and current to flow between the DC filter and the AD / DC converter. The DC / AC converter provides a residual DC voltage to the transformer under the control of the microcomputer in case of power failure, thereby providing stable charging. Characterized in that complete.

In particular, a noise filter for removing noise from the input AC voltage is further provided between the input terminal and the converter.

In addition, the converter 30 is characterized in that the bridge diode.

Finally, the battery charging device according to the present invention is characterized in that the adjustment of the constant voltage and the constant current within the range of voltage DC 12 ~ 48V and current 100A ~ 800A.

According to the battery charger of the present invention has the following effects.

1) It prevents the battery from being damaged because the charging voltage is supplied to the battery for a certain time even in the case of power failure and the charging is completed stably.

2) In charging the discharged battery, the damage of the cell of the battery is reduced, thereby improving the charging efficiency. As a result, it is possible to continue to use the discharged battery without disposing of it, thereby generating economic benefits.

3) As it regulates constant voltage and constant current, it can be used to charge not only batteries used in vehicles but also batteries used in mobile phones.

1 is a circuit diagram showing the configuration of a battery charging apparatus according to the present invention.

10: input stage 20: noise filter

30: converter 40: DC filter

50: DC / AC converter 60: transformer

70: AD / DC converter 80: output terminal

90: micom

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. 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 embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

(구성)(Configuration)

The battery charging device according to the present invention includes an input terminal 10 for receiving an AC voltage from the outside, an output terminal 80 for finally outputting the converted DC voltage to the outside to charge the battery, and an AC voltage to DC. In addition to the conversion to a conversion means for inducing a stable charging is completed even in the event of a power outage, and control them to include a microcomputer 90 for controlling the voltage and current according to the capacity of the battery.

In particular, the converting means includes a converter 30 for converting the AC voltage to DC, a DC / AC converter 50 for converting the DC voltage to an AC voltage under the control of the microcomputer 90, and the converted AC voltage. Transformer 60 for boosting, and AC / DC converter 70 for converting the boosted AC voltage to DC to output to the output terminal (80).

Hereinafter, these structures will be described in more detail.

The battery charging device according to the present invention receives an AC voltage from the outside through the input terminal 10. Then, the input AC voltage is changed into a DC voltage through the converter 30. Here, a bridge diode is used as the converter 30. In addition, a noise filter 20 may be further provided between the input terminal 10 and the converter 30 to remove unnecessary frequencies or to drop voltages.

The DC voltage thus converted is output to the DC / AC converter 50 via the DC filter 40. At this time, the DC filter 40 and the DC / AC converter 50 is limited to the voltage and current applied through the control of the microcomputer 90. That is, the microcomputer 90 controls the voltage and current output to the output terminal 80 to have a constant value, for example, the voltage is output in the range of DC12 to 48V and the current is in the range of 100A to 800A. This range depends on the type of battery connected to the output stage 80. For example, a battery used in an automobile or the like outputs a voltage of 12 VDC and a current of 100 A.

Meanwhile, the DC / AC converter 50 outputs the converted power to the transformer 60. In particular, when there is no input voltage from the outside, such as a power failure, the DC / AC converter 50 provides the residual voltage to the transformer 60 so that charging is stable. Make it happen. That is, even when the power is cut off from the outside, the residual voltage remains in the DC / AC converter 50. In the present invention, the residual voltage is boosted by using the transformer 60, and then the state of charging the battery may be stably terminated. In order to provide a voltage supply for a predetermined time (for example, several seconds).

In addition, the DC / AC converter 50 monitors the strength of the voltage and current output to the output terminal 80 to check whether the output is at the set constant voltage and constant current, and outputs accordingly.

The transformer 60 boosts the AC voltage output from the DC / AC converter 50. The AC voltage thus boosted is output to the AC / DC converter 70.

The AC / DC converter 70 finally converts an AC voltage into a DC voltage and outputs it to the outside through the output terminal 80 to charge the battery.

As described above, the present invention charges the battery for a few seconds by boosting the remaining voltage remaining in the DC / AC converter even when charging is abnormally terminated, such as a power failure, so that the charging of the battery is normally terminated. This will not only prevent the battery from being damaged but also improve the recycling efficiency of the waste battery.

Claims

An input terminal 10 for receiving an AC voltage from the outside;

A converter (30) for outputting the AC voltage as a DC voltage;

A DC filter 40 for filtering the DC voltage;

A DC / AC converter 50 for converting the filtered DC voltage into AC;

A transformer 60 for adjusting the converted AC voltage;

An AD / DC converter 70 for converting an AC voltage output from the transformer 60 into a DC voltage;

An output stage 80 for outputting the DC voltage converted from the AD / DC converter 70 to a battery for charging; And

And a microcomputer 90 for controlling a voltage such that a constant voltage and a current flow between the DC filter 40 and the AD / DC converter 70.

The DC / AC converter (50) is a battery charging device, characterized in that the charging is completed stably by providing a residual DC voltage to the transformer (60) under the control of the microcomputer (90) during a power failure.
The method of claim 1,

Battery charging device, characterized in that further provided between the input terminal 10 and the converter 30, the noise filter 20 for removing noise from the input AC voltage.
The method of claim 1,

Battery converter characterized in that the converter (30) is a bridge diode.
The method according to claim 1, wherein

The voltage output through the output terminal is a DC 12 ~ 48V and the current at this time is a battery charger, characterized in that 100A ~ 800A.