KR20050120010A - Battery charger - Google Patents

Abstract

The present invention relates to a high-frequency battery charger using a redundancy circuit to allow a stable supply of power while allowing the charging power to be supplied in duplicate so that power is supplied through a normal path in emergency.

The present invention described above,

After the noise component included in the power supply is removed while the AC 380V three-phase power supply and ground voltage pass through the AC noise filter, the three-phase no-fuse breaker (NFB) and the TNR element for surge removal To eliminate the surge voltage

The three-phase power source from which the surge voltage is removed is an appropriate DC power supply by a three-phase diode propagation bridge consisting of six diodes,

The DC power from the diode propagation bridge is applied to the DC-DC converter consisting of IGBT, high frequency transformer and bridge diode, and a plurality of diodes and capacitors after the smooth choke coil is converted into an appropriate DC power supply.

The voltage by the switching action of the IGBT is converted into a proper voltage through a high frequency transformer having a blocking capacitor to be rectified by the bridge diode,

The device capacity of the regenerative snubber formed of the diode and the capacitor is reduced by the diode,

After the DC power converted by the DC-DC converter through the smoothing choke coil and the Hall sensor to be applied to a plurality of battery terminals again through a DC noise filter,

AC 380V three-phase power supply and ground voltage is AC noise filter, three-phase no fuse breaker, TNR element, diode radio bridge, smooth choke coil, DC-DC converter, smooth choke coil, hall sensor and DC noise The charging circuit of the filter must be configured in a redundant manner to charge the plurality of batteries only through the lines connected by the magnet switch, or to supply the power supplied to the load by the voltage drop through the silicon diode group of the voltage drop. And compensating for compensation.

Description

Battery charger for high frequency type battery using dual circuit {Battery charger}

The present invention relates to a high-frequency battery charger using a redundant circuit, in detail, the automatic mode in which the floating operation and the equal operation is automatically switched according to the voltage of the battery and the manual switching to the equal operation by the time reserved by the user. The present invention relates to a battery charger for a high frequency type battery using a redundant circuit that enables a stable output of a 125V load power supply as well as a battery charging mode arbitrarily and enables a smooth operation even when a failure occurs due to a duplication of a charging circuit. .

In general, the charger is used to charge a plurality of batteries in floating and equalizing conditions at ambient temperatures of -25 ° C or higher and 40 ° C or lower. When power is applied again after power failure, it should be performed evenly, and after charging, it should be converted to floating operation again.

Floating charge voltage is 2.17V ~ 2.18V per battery, which means 130V ~ 131V is needed to charge 60 batteries.Equal charging voltage is 2.25V ~ 2.30V per battery, which can charge 60 batteries. When the voltage of 135 ~ 138V is required.

Therefore, conventionally, the three phase AC 380V has a voltage drop in the transformer and is changed to the rated voltage of DC while being supplied to the battery terminal while passing through the SCR bridge, thereby controlling the phase while controlling the gate of the SCR bridge.

However, according to the control device of the conventional charger as described above, the manual movement time by the floating operation, the equal operation and the timer must be selected and adjusted as a switch, as well as the voltage value according to the manual operation by the floating operation and the equal operation and the timer. Since it had to be adjusted through a variable resistor, a skilled technician could not operate the charger, and even a skilled technician had to check and adjust the operation method while checking the state of charge and discharge of the battery from time to time.

Therefore, the applicant has proposed a patent application No. 1998-18767 (control device of the charger) and a patent application No. 1999-20992G (battery charger),

This allows the three-phase AC 380V to be converted to the appropriate DC voltage via the SCR bridge and DC-DC converter, applied to multiple DC 2V battery terminals, and output to the load at the rated DC voltage via the voltage drop.

The internal controller controls the internal operation while monitoring the state according to the internal operation while controlling the above SCR bridge,

DC-DC converter composed of IGBT (Insulated Gate Bipolar Transistor), high frequency transformer and a plurality of diodes selectively operates DC power from the above-mentioned SCR bridge while a plurality of IGBTs are selectively operated by the control signal of IGBT control unit. To the power source,

The voltage current change display controller displays the current change value and the voltage change value on the graphic LCD through the graphic LCD driver.

The voltage drop selectively drives transistors and relays so that the rated DC125V voltage is supplied to the load.

The contact signal detector is configured to visually display the state of overvoltage and overcurrent through graphic LCD by trip signal of contact according to input voltage or overload voltage, overcurrent and high temperature of IGBT.

However, by the controller of the charger of the previous application as described above,

If a fault occurs in a part of a charging circuit or a fault occurs due to a poor condition of a line, charging or operation of the battery is interrupted, and an overvoltage or abnormal voltage such as noise is included in the input AC power or output DC power. Even if there was a problem that can not be removed efficiently.

Accordingly, the present invention has been made to solve the conventional problems as described above, uninterruptible by configuring a charging circuit for supplying the load while converting the input AC power to the DC power via a plurality of switches and IGBT, respectively It is an object of the present invention to provide a battery charger for a high frequency type battery using a redundant circuit which is supplied by a stepless stagnation method.

In addition, another object of the present invention is to control the IGBT in a full bridge method or a three-level method while allowing the AC power source on the input side and the DC power source on the output side to be supplied to a stable power supply by a noise filter.

Charger for high frequency battery using the redundant circuit of the present invention for achieving the above object,

After the noise component included in the power supply is removed while the AC 380V three-phase power supply and ground voltage pass through the AC noise filter, the three-phase no-fuse breaker (NFB) and the TNR element for surge removal To eliminate the surge voltage

The three-phase power source from which the surge voltage is removed is an appropriate DC power supply by a three-phase diode propagation bridge consisting of six diodes,

The DC power from the diode propagation bridge is applied to the DC-DC converter consisting of IGBT, high frequency transformer and bridge diode, and a plurality of diodes and capacitors after the smooth choke coil is converted into an appropriate DC power.

The voltage by the switching action of the IGBT is converted into a proper voltage through a high frequency transformer having a blocking capacitor to be rectified by the bridge diode,

The device capacity of the regenerative snubber formed of the diode and the capacitor is reduced by the diode,

The DC power converted by the DC-DC converter is applied to the plurality of battery terminals through the DC noise filter after the smoothing choke coil and the Hall sensor.

AC 380V three-phase power supply and ground voltage is AC noise filter, three-phase no fuse breaker, TNR element, diode radio bridge, smooth choke coil, DC-DC converter, smooth choke coil, hall sensor and DC noise The charging circuit of the filter must be configured in a redundant manner so that a plurality of batteries can be charged only through a line connected by a magnet switch, or the power supplied to the load by a voltage drop through the silicon diode group of the voltage drop. And compensating for compensation.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 and 2 show the overall configuration and configuration of the charging circuit of the present invention,

After the three-phase power supply (A1), B1 (C1) and ground voltage (N) of AC 380V pass through the AC noise filter (1), the noise component included in the power supply is removed, and then the three-phase no-fuse breaker ( NFB: No fuse breaker (2) and surge removal TNR element (3) to eliminate the surge voltage,

The three-phase power source (A1) (B1) (C1) from which the surge voltage is removed is made to be a DC power source of an appropriate value by a diode propagation bridge (4) consisting of six diodes,

The DC power supply from the bridge 4 is passed through the smooth choke coil 5, and then the IGBT (Q1), Q2, Q3, Q4, high frequency transformer (T1), bridge diode (BD1) and a plurality of It is applied to the DC-DC converter 6 composed of diodes DM1 (DM2) and capacitors (SC2, SC3) to be converted into appropriate DC power,

The high voltage transformer having a blocking capacitor BC1 for preventing the transient leakage current while preventing the excitation current of the high frequency transformer T1 is prevented by the switching action of the IGBTs Q1, Q2, Q3 and Q4. Through T1) is converted into a proper voltage to be rectified by the bridge diode (BD1),

The device capacity of the regenerative snubber formed of the diodes DM1 (DM2) and the capacitors (SC2, SC3) is reduced by the diodes (DM1) (DM2),

After the DC power converted by the DC-DC converter (6) via the smooth choke coil (7) and the Hall sensor (8) to be applied to the plurality of battery terminals again through the DC noise filter (9) ,

AC 380V three-phase power supply (A1.B1.C1) (A2, B2, C3) and ground voltage (N) are AC noise filter (1) (1 '), three-phase fuse fuse (NFB) ( 2) (2 '), TNR element (3) (3'), diode full wave bridge (4) (4 '), smoothing choke coil (5) (5'), DC-DC converter (6) (6 ') ), The choke coils 7 (7 ') for smoothing, the hall sensors (8) (8'), and the charging circuits (A) (B) of the DC noise filter (9) (9 '), respectively, in a redundant configuration. The plurality of batteries 10 may be charged only through the lines connected by the switches MG SW1 and MG SW2, or the silicon diode groups SD1 to SDn of the voltage drop unit 11 may be magnet switches. It is configured to be supplied to the load LOAD 12 at a rated voltage of DC 125V while compensating for the voltage drop by the state selectively turned on by MS1) (MS2) ... (MSn).

The diode propagation bridge 4, 4 ′ is turned on / off by the control of the main controller 13, 13 ′.

The IGBTs Q1, Q2, Q3 and Q4 of the DC-DC converter 6 are controlled by the full bridge method.

Figure 3 shows the name plate of the main controller of the present invention,

The first charging circuit A supplied with AC power and supplied to the DC power through the switching element and the second charging circuit B supplied with AC power to the DC power through the switching element are selectively switched to operate. The state is displayed through the first charge display unit 21 and the second charge display unit 22,

The voltage value and the current value of the power supplied to the battery 10 through the first charging circuit A or the second charging circuit B are displayed through the first voltmeter 23 and the first ammeter 24, respectively. Let's do it,

The voltage and current values of the power supplied to the load 12 through the first charging circuit A or the second charging circuit B are displayed through the second voltmeter 25 and the second ammeter 26, respectively. Let's do it,

If the operation state of the first charging circuit (A) or the second charging circuit (B) is selected by the automatic operation through the automatic operation switch 27 or by the manual operation via the manual operation switch (28) by self-luminescence To know the operation status,

The first charging circuit selection switch 29 and the second charging circuit selection switch 30 for selecting the first charging circuit A or the second charging circuit B to operate are not only selected by a manager, but also presently. Display the status of operation by self-illumination

The first charging circuit A or the second charging circuit B is operated by the automatic operation by the automatic operation switch 27 or the manual operation by the manual operation switch 28. The state is displayed through the overvoltage display section 31, the low voltage display section 32, and the low current display section 33 to have an alarm function.

4 shows a detailed configuration of the main controller of the present invention.

When the initial power is supplied by the reset IC 41, the data signal output from the output terminal of the microprocessor 42, in which the reset signal is input to the reset terminal, is divided into a plurality of D-flip-flop latch ICs 43 and 44. The second voltmeter 25 and the second ammeter while displaying the voltage value and the current value of the power supplied to the battery 10 to the first voltmeter 23 and the first ammeter 24 via the 45, respectively. To display the voltage value and the current value of the power supplied to the load 12 to 26, respectively,

Mode switch selection switch to select mode of time control, reservation time and voltage control, setting switch for setting output voltage up or down output voltage with selection switch, equal operation selection switch, floating operation By turning on / off the selector switch, manual operation selector switch and alarm return selector switch, the two-color LEDs (LED1) (LED2) (LED3) (LED4) (LED5) (LED6) light green or red simultaneously. By passing the option according to the microprocessor 40,

The voltage value and current value of the power supplied to the battery 10 and the voltage value and current value of the power supplied to the load 12 go through the operational amplifiers OP1, OP2, OP3, and OP4, respectively, and then the analog / Is converted to a digital value via the digital converter 46 and transmitted to the microprocessor 42 above,

Interchangeable with the first charging circuit selection switch 29 for selecting the operation of the first charging circuit A and the second charging circuit selection switch 30 for selecting the operation of the second charging circuit B The option by the connected automatic operation switch 27 and the manual operation switch 28 is transmitted to the microprocessor 42 and selectively turns on the magnet switch MG SW1 (MG SW2) of FIG. 1. When the first charging circuit A in operation becomes an abnormal state such as an overvoltage, an overcurrent, or an overheating state, it is configured to be outputted to the relays RY1 and RY2 for the operation of the second charging circuit B. To the relay RY2 and the magnet switch MG SW2 is turned on to operate normally, and outputs "L" to the relay RY1 to stop the operation of the first charging circuit A. The magnet switch MG SW1) is turned off.

Figure 5 shows a name plate of the charging circuit of the present invention,

In the first charging circuit (A) or the second charging circuit (B), AC power from the outside passes normally through the fuse fuse NFB (2) (2 ') and the diode propagation bridge (4) (4'). Whether to be supplied is informed via the display unit 51 during operation,

Mode switch selection switch 52 for selecting the mode of time adjustment, reservation time and voltage adjustment, setting switch for setting after selecting the setting value of the state of raising the output voltage or reducing the output voltage with the selection switch 53 ), The uniform operation selector switch 55, the floating operation selector switch 56, and the manual operation selector switch 57 allow input of options, while the alarm return selector switch 58 and the power lamp 59 are in operation. To display the operation state through the buzzer 60 and the alarm lamps 61.

6 shows a detailed configuration of the charging circuit controller of the present invention.

In the first microcomputer 63, which determines whether the watchdog timer IC 62 is in a normal operating state, the current time is displayed through the clock IC 64, and the state according to the operation is displayed on the LCD 65 together with the time information. Let's do it,

A plurality of photo couplers (PC1) (PC2) (PC3) (PC4) made of a pair of light emitting diodes and phototransistors at the same time to allow the first microcomputer 63 to pass the options through switches via the input / output IC 66. Receive drive information, overvoltage, overcurrent and overheating status according to the operation.

The first microcomputer 63 receiving the operation information receives a reset signal from the outside through a photo coupler PC5 formed of a pair of light emitting diodes and a photo transistor, or a photo coupler composed of a pair of light emitting diodes and a photo transistor. (PC6) to output the information according to the state of operation or driving standby,

The first microcomputer 63 receives an alarm signal according to an abnormality such as an overvoltage, an overcurrent, an overheating state, and the like through the alarm contact 67, and receives the corresponding information. The photo coupler PC7 includes a pair of light emitting diodes and a photo transistor. To the microprocessor 42 of the main controller through

The first microcomputer 63 may provide information on the input voltage from the outside input through the operational amplifier OP5 and information on the charging voltage of the battery 10 input through the operational amplifier OP6 and the operational amplifier OP7. The state of charging the battery 10 by receiving the information on the battery charging current input through the information and the battery current input through the operational amplifier OP8 via the analog-to-digital converter (ADC) 68 It is configured to control efficiently.

Figure 7 shows a detailed configuration of the voltage drop of the present invention,

In the second microcomputer 72 receiving the reset signal through the reset IC 71 and receiving the reference voltage through the constant voltage diode ZD, the DC input voltage is received through the operational amplifier OP9 to receive a dip switch ( 73) and compare with the set voltage.

In the case of 125V through the comparison result display unit 74, the green light is turned on and the display according to the state higher or lower than 125V is displayed so that it can be seen from the outside. The voltage drop is performed while selectively passing through a plurality of silicon diodes while turning on / off the magnet switches MS1, MS2, ..., MSn through RY1n.

8 shows a configuration of an IGBT control unit,

The external voltage supplied from the outside through the operational amplifier OP10 is input through the changeover switch SW1,

The battery supply voltage supplied through the variable resistor VR1 is compared in the comparator OP12 with the external voltage through the operational amplifier OP11 and then the amplification circuit and the resistor R1 and the diode of the operational amplifier OP13. It is supplied to the full bridge control IC 81 via the filter circuit (D1) to output the output signal to the IGBT driver 90,

The battery supply voltage is input as a signal for stopping the operation of the full bridge control IC (81) in the case of an overvoltage,

The battery supply current supplied through the operational amplifier OP14 is compared with the current value from the current automatic setting unit 82 in the comparator OP15, and after the overcurrent blocking unit 83 is over 10A, it is determined whether there is an overcurrent. To be input to the operational amplifier OP12,

The load supply current supplied through the operational amplifier OP16 is input to the other side of the changeover switch SW1,

As a result of comparing the reference voltage supplied through the variable resistor VR2 and the external voltage with the comparator OP17, the reference current supplied through the variable resistor VR3 and the load supply current are compared with the comparator OP18. In the latch IC 86 that receives both the comparison result and the result of comparing the temperature value detected by the temperature sensor 85 with the reference temperature in the comparator OP19, the NAND gate NA1 in the case of an overvoltage, an overcurrent, or an overheat state. It is configured to be input as a signal for blocking the output to the IGBT driver 90 via (NA2) and at the same time to be output as an alarm output signal to the alarm output unit 84 via the NAND gate (NA3) (NA4).

9 illustrates a configuration of an IGBT driver.

The 80 ~ 260V AC power supplied from the outside passes through the fuse, transformer (T2) and bridge diode (BD2), and then goes through transformer (T3) to be a DC power source of DC12V, -DC12V, and DC20V. and,

DC power supply of 20V to be supplied to at least four places,

The above DC20V is set to be rated DC20V while passing through transformers T4, T5, T6, T7 and constant voltage ICs 91, 92, 93, 94, respectively.

The rated DC 20V passes through the IGBT driving ICs 95, 96, 97 and 98 and then through the photocoupler PC8, PC9, PC10 and PC11 for overcurrent detection. It is configured to enable on / off control by outputting the driving signal for turning on / off of Q1, Q2, Q3, and Q4).

10 schematically shows a configuration of an IGBT according to another embodiment of the present invention.

The IGBT 16 may be controlled in a three-level manner rather than a full bridge manner.

As described in detail above, in the high frequency battery charger using the redundant circuit according to the present invention, the DC converter is composed of a high frequency device using IGBT to provide excellent heat dissipation effect and insulation effect against an input surge.

The charging transformer is made of a high frequency method using a ferrite core so that the weight is light and there is no noise.

Output voltage regulator is digital control method to enable manual operation and automatic operation (floating charging, equal charging)

While controlling according to the option set through the front panel, the option or operation status is displayed on the front LCD by graphic display method.

In the above manual operation, the power is continuously adjusted by using one-touch button, and when the automatic operation function is lost, as well as the automatic operation can be switched arbitrarily during automatic operation.

In the above automatic operation, the switching of the floating charge and equal charge and the voltage control are continuously adjusted,

Do not overvoltage at equal charge,

In order to reserve the equalization charge schedule more than 10 times a year from floating charge, display up to unit of year, month, day, hour, minute and second on display unit,

Automatically perform equal operation at the reservation time and transfer to floating operation after charging is completed.

If the full charge of the battery is not completed at the above set time, the charging current is sensed and finally switched to the floating operation state.

When the supply of AC power is cut off and recovered, it automatically starts the equalized charging, which is a recovery operation, and detects when the charging current is almost reduced, and automatically returns to the floating charging state.

At the end voltage of the battery, when the charging voltage exceeds the maximum allowable voltage of the load, it adversely affects the load. Therefore, the silicon dropper method is used to quickly respond to the load voltage.

By configuring the above charging circuit in dual, there is an effect of enabling a smooth operation even when a failure occurs by an uninterruptible and uninterrupted switching method.

1 is a schematic view showing the overall configuration of the present invention.

Figure 2 is a schematic diagram showing the configuration of the charging circuit of the present invention.

Figure 3 is a front view showing a name plate of the main controller of the present invention.

4 is a circuit diagram showing a detailed configuration of the main controller of the present invention.

Figure 5 shows a name plate of the charging circuit of the present invention,

6 is a circuit diagram showing a detailed configuration of the charging circuit controller of the present invention.

7 is a circuit diagram showing a detailed configuration of the voltage drop section of the present invention.

8 is a circuit diagram showing a configuration of an IGBT control unit of the present invention.

9 is a circuit diagram showing a configuration of an IGBT driver of the present invention.

10 is a block diagram schematically showing a configuration of an IGBT according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: AC noise filter 2: No fuse breaker

4: diode full bridge 6: DC-DC converter

8: Hall sensor 9: DC noise filter

11: voltage drop

MG SW1, MG SW2, MS1, MS2 ... MSn: Magnet Switch

Claims (8)

Three-phase diode full-wave bridge converting AC 380V three-phase power source and ground voltage to DC power source with noise and surge voltage removed, A main controller which controls an internal operation while monitoring a state according to the internal operation by the DC power converter; A DC-DC converter for converting the DC power from the diode propagation bridge into an appropriate DC power; An IGBT control unit for controlling the IGBT of the DC-DC converter in a full bridge manner; An IGBT driver for smoothly converting to DC power while selectively turning on / off the IGBT under the control of the IGBT controller; A charging circuit controller for efficiently charging the battery while judging whether there is an overvoltage, an overcurrent, or an overheat state; A charger for a high frequency battery using a redundancy circuit, characterized by comprising voltage drop parts for compensating power supplied to a load by voltage drop while appropriately controlling on / off of a silicon diode group. The method of claim 1, The charging circuit for charging power to the battery, After the 3-phase power supply and ground voltage of AC 380V pass through the AC noise filter 1, the noise component included in the power supply is removed, and then the 3-phase no-fuse breaker 2 and the surge removing TNR element 3 To eliminate the surge voltage The three-phase power supply is a DC power supply of an appropriate value by the diode full-wave bridge (4) consisting of six diodes, The DC power supply from the diode propagation bridge 4 passes through the smooth choke coil 5, and then the IGBT (Q1) (Q2) (Q3) (Q4), the high frequency transformer (T1) and the bridge diode (BD1). It is applied to the DC-DC converter 6 composed of a plurality of diodes (DM1) (DM2) and capacitors (SC2, SC3) to be converted into an appropriate DC power supply, The voltage by the switching action of the IGBTs Q1, Q2, Q3, and Q4 is converted into an appropriate voltage through the high frequency transformer T1 including the blocking capacitor BC1 to the bridge diode BD1. Rectified by The device capacity of the regenerative snubber formed of the diodes DM1 (DM2) and the capacitors (SC2, SC3) is reduced by the diodes (DM1) (DM2), The DC power source converted by the DC-DC converter 6 is applied to the plurality of battery terminals via the DC choke coil 7 and the hall sensor 8 and then again through the DC noise filter 9. Charger for high frequency battery using a redundant circuit characterized in that. The method according to claim 1 or 2, The main controller mentioned above When the initial power is supplied by the reset IC 41, the data signal output from the output terminal of the microprocessor 42, in which the reset signal is input to the reset terminal, is divided into a plurality of D-flip-flop latch ICs 43 and 44. The voltage and current values of the power supplied to the battery 10 through the first voltmeter 23 and the first ammeter 24 are respectively displayed through the second voltmeter 25 and the second ammeter ( 26) displays the voltage value and the current value of the power supplied to the load 12, respectively. Mode switch selection switch to select mode of time control, reservation time and voltage control, setting switch for setting output voltage up or down output voltage with selection switch, equal operation selection switch, floating operation By turning on / off the selection switch, manual operation selection switch, and alarm return selection switch, the two-color LEDs (LED1) to (LED6) light green or red, and accordingly, the option according to the above-described microprocessor (40). ), After the voltage value and current value of the power supplied to the battery 10 and the voltage value and current value of the power supplied to the load 12 go through the operational amplifiers OP1 to OP4, respectively, the analog / digital converter 46 Is converted to a digital value while passing through to the microprocessor 42, Interchangeable with the first charging circuit selection switch 29 for selecting the operation of the first charging circuit A and the second charging circuit selection switch 30 for selecting the operation of the second charging circuit B The option by the connected automatic operation switch 27 and the manual operation switch 28 is transmitted to the microprocessor 42 and a relay for selectively turning on the magnet switches MG SW1 and MG SW2. When the first charging circuit A in operation becomes an abnormal state of overvoltage, overcurrent or overheating state by outputting to RY1 and RY2, the relay RY2 for the operation of the second charging circuit B is operated. If the magnet switch (MG SW2) is turned on and operates normally, the magnet switch (MG SW1) is turned off by outputting "L" to the relay (RY1) to stop the operation of the first charging circuit (A). Using a redundant circuit characterized in that configured to High frequency mode battery charger. The method according to claim 1 or 2, The above charging circuit controller, The first microcomputer 63, which determines whether the watchdog timer IC 62 is in a normal operating state, displays the current time through the clock IC 64, and displays the state according to the operation along with the time information on the LCD 65. Let's do it, Drive information and overvoltage are transmitted to the first microcomputer 63 through photo couplers PC1 to PC4 formed of a pair of light emitting diodes and phototransistors, while allowing the option to be transmitted through switches via the input / output IC 66. , Receive information according to the operation of overcurrent and overheating state, The first microcomputer 63 receiving the above operation information receives a reset signal from the outside through the photo coupler PC5 or outputs information according to the driving or driving standby state through the photo coupler PC6. , The first microcomputer 63 receives an alarm signal corresponding to an abnormality of an overvoltage, an overcurrent, and an overheating state through the alarm contact 67, and transmits the corresponding information to the microprocessor 42 through the photo coupler PC7. To deliver, The first microcomputer 63 may provide information on the input voltage from the outside input through the operational amplifier OP5 and information on the charging voltage of the battery 10 input through the operational amplifier OP6 and the operational amplifier OP7. The state of charging the battery 10 by receiving the information on the battery charging current input through the information and the battery current input through the operational amplifier OP8 via the analog-to-digital converter (ADC) 68 Charger for high frequency type battery using a redundant circuit, characterized in that configured to efficiently control the. The method according to claim 1 or 2, The voltage drop unit, The second microcomputer 72 receives the reset signal through the reset IC 71 and receives the reference voltage through the constant voltage diode ZD, and receives the DC input voltage through the operational amplifier OP9. Compare with the set voltage by In the case of 125V through the comparison result display unit 74, the green light is turned on and the display according to the state higher or lower than 125V is displayed so that it can be seen from the outside. Charger for high frequency battery using a redundant circuit, characterized in that the voltage drop is made while selectively passing through a plurality of silicon diodes while the magnet switches (MS1) ... (MSn) are turned on / off through (RY1n) . The method according to claim 1 or 2, The IGBT control unit is The external voltage supplied from the outside through the operational amplifier OP10 is input through the changeover switch SW1, The battery supply voltage supplied through the variable resistor VR1 is compared in the comparator OP12 with the external voltage through the operational amplifier OP11 and then the amplification circuit of the operational amplifier OP13, the resistor R1 and the diode ( It is supplied to the full bridge control IC 81 via the filter circuit of D1) to output the output signal to the IGBT driver 90, The battery supply voltage is input as a signal for stopping the operation of the full bridge control IC (81) in the case of an overvoltage, The battery supply current supplied through the operational amplifier OP14 is compared with the current value from the current automatic setting unit 82 in the comparator OP15 and then judges whether there is an overcurrent while passing the overcurrent blocking unit 83 by 10A or more. To be input to the operational amplifier OP12, The load supply current supplied through the operational amplifier OP16 is input to the other side of the changeover switch SW1, As a result of comparing the reference voltage supplied through the variable resistor VR2 and the external voltage with the comparator OP17, the reference current supplied through the variable resistor VR3 and the load supply current are compared with the comparator OP18. In the latch IC 86 that receives both the comparison result and the result obtained by comparing the temperature value detected by the temperature sensor 85 with the reference temperature in the comparator OP19, the NAND gate NA1 in case of overvoltage, overcurrent, or overheating. (NA2) is inputted to the IGBT driver 90 as a signal for blocking the output, and is configured to be output as an alarm output signal to the alarm output unit 84 via the NAND gate (NA3) (NA4). Charger for high frequency type battery using a double redundancy circuit. The method according to claim 1 or 2, The IGBT drive unit, The 80 ~ 260V AC power supplied from the outside passes through the fuse, transformer (T2) and bridge diode (BD2), and then goes through transformer (T3) to be a DC power source of DC12V, -DC12V, and DC20V. and, DC power supply of 20V to be supplied to at least four places, The above DC 20V is set to be rated DC20V while passing through the transformers T4 to T7 and the constant voltage ICs 91 to 94, respectively. The rated DC 20V passes through the IGBT drive ICs 95 to 98 and then for the on / off of the IGBTs Q1, Q2, Q3 and Q4 through the overcurrent photocouplers PC8 to PC11. Charger for high frequency type battery using a redundant circuit, characterized in that configured to be output as a drive signal. AC noise filter (1) (1 ') to which AC 380V three-phase power supply (A1.B1.C1) (A2, B2, C3) and ground voltage (N) are supplied, and three-phase no-fuse breaker (NFB) ( 2) (2 '), TNR element (3) (3'), diode full wave bridge (4) (4 '), smoothing choke coil (5) (5'), DC-DC converter (6) (6 ') ), The choke coils 7 (7 ') for smoothing, the hall sensors (8) (8'), and the charging circuits (A) (B) of the DC noise filter (9) (9 '), respectively, in a redundant configuration. The plurality of batteries 10 may be charged only through the lines connected by the switches MG SW1 and MG SW2, or the silicon diode groups SD1 to SDn of the voltage drop 11 are magnet switches MS1. Using a redundant circuit, characterized in that configured to be supplied to the load (LOAD) 12 at a rated voltage of DC 125V while compensating for the voltage drop by the state selectively turned on by (MS2) ... (MSn) Charger for high frequency battery.