JPH10150729A - Charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an accident caused by an incorrect connection between a charger and a power supply by checking an AC power supply input system by means of a voltage doubler control circuit and charging the charger with charging voltage of a charging voltage converting circuit or cutting out the input of power based on the output of an abnormal voltage detecting circuit. SOLUTION: A power supply 3 for a charger is provided with a means for converting the input power to DC 12V even if the input power is either AC100V or AC200V. A voltage doubler control circuit 6 judges whether the input voltage is 100V or 200V. An abnormal voltage detecting circuit 15 allows the charger to operate when the voltage of a capacitor 14 is within a predetermined range and cuts out the input of the charger by opening a switching section when the voltage of the capacitor 14 is out of the predetermined range. A charging voltage converting circuit 17 converts the DC200V power to DC48V power. A memory and a control circuit 20 control the entire operation of the charger including the voltage doubler control circuit 16 and the abnormal voltage detecting circuit 15. Owing to this structure, the charger never operate when the connection is incorrect, and so the damage of the charger and other components can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging apparatus, and in particular, automatically converts power from an AC 100V system power supply and a 200V system power supply to DC power of a predetermined voltage, and performs charging. Related to the device to perform.

[0002]

2. Description of the Related Art In Japan and overseas, power supplies are generally single-phase AC.
It is divided into 00V system and 200V system and three-phase 200V system. There is also a two-phase 200V power supply. Where 10
The 0 V system includes power supply voltages of 100 V, 110 V, and 120 V, and the 200 V system includes power supply voltages of 200 V, 220 V, and 240 V.

[0003] A plurality of types of power supplies (100 V and 200 V) are mixed in a facility such as a construction site, an electric equipment construction company, and a factory. To this end, the charging device is provided with two power input units, i.e., a 100V-only input unit and a 200V-only input unit, to accept input from any power source. When the power supply voltage is 100 V, the power supply is connected to the 100 V dedicated input unit of the charging device. When the power supply voltage is 200 V, the power supply is connected to the 200 V dedicated input unit of the charging device.

[0004]

In such a conventional charging apparatus, for example, a power supply side connector or an input section connector of the charging apparatus is connected so as to prevent incorrect connection when connecting the power supply and the charging apparatus. Some labeling (eg, voltage indication or color coding) is provided on either or both.

However, in spite of this, where a plurality of types of power sources are mixed, a 200V power source and a 10
The 0 V dedicated input unit may be incorrectly connected, or the 100 V power supply and the 200 V dedicated input unit of the charging device may be incorrectly connected. If the connection is made incorrectly, the charging device does not function properly, and sometimes the charging device and the medium to be charged (such as a battery) are damaged.

In the conventional charging apparatus, a choke coil for removing noise is provided only immediately downstream of a power supply input section of the charging apparatus. However, the choke coil has a large number of turns, and therefore has a large size, and has disadvantages that the overall size of the charging device is large and the manufacturing efficiency of the device is poor.

[0007] Further, the conventional charging device does not have a display means for allowing a user to distinguish between a normal operation and an abnormal occurrence. Therefore, there is a disadvantage that the user cannot judge from the outside whether or not the charging device is operating normally, that is, whether or not the charging is normally performed.

[0008] In addition, there is a conventional charging device that can perform equal charging in addition to ordinary charging. This equal charging is performed every predetermined period, and the conventional charging device manually switches between normal charging and equal charging.
In the conventional charging device, if the power to the charging device is cut off due to a power outage etc. while performing equal charging, the charging power to the battery etc. being charged is also cut off, and the charging operation ends at that point Resulting in. Therefore, there is a disadvantage that complete equal charging is not performed unless charging is performed again in the equal charging mode.
(Equal charging generally means charging the battery slightly higher than normal charging and slightly longer than normal charging to charge the battery, and equalizing the voltage between the cells of the battery that is not uniform. In addition, when charging is performed using a three-phase AC power supply, one phase during input is lost due to some cause, for example, disconnection of an input line. In some cases, a sufficient charging voltage is not provided. However, the conventional charging device displays an open phase state even if an open phase occurs in the three-phase input,
There is no means to stop charging.

The present invention has been made to improve this point, and a first object of the present invention is to provide a charging device which does not need to consider whether the connection between the power supply and the charging device is proper or not, That is, it is an object of the present invention to provide a charging device that accepts an input from a power source of either 100V system or 200V system.

A second object of the present invention is to provide a charging apparatus which is small in size and has improved manufacturing efficiency, and which is provided with a low-cost, small-size and noise-reducing means having high noise-removing efficiency.

[0011] A third object of the present invention is to provide a charging apparatus provided with a display means by which a user can easily confirm the occurrence of an abnormality from outside when an abnormality has occurred.

[0012] A fourth object of the present invention is to provide a charging apparatus having means for automatically performing equal charging when resuming equal charging when charging is not completed in order to perform complete equal charging. is there.

A fifth object of the present invention is to provide a charging apparatus having means for stopping charging when there is an input phase loss when charging is performed with three-phase input.

[0014]

In order to solve the above-mentioned problems, a charging apparatus according to the present invention is a charging apparatus for performing charging by rectifying an AC power supply input of either a 100 V system or a 200 V system to DC. A voltage doubler control circuit for detecting whether the AC power supply input is a 100 V system or a 200 V system, and when the voltage doubler control circuit determines that the AC power supply input is a 100 V system, A voltage doubler circuit for converting an AC power supply input to a doubled voltage; a first circuit for providing an output voltage of the voltage doubler circuit or a charging voltage conversion circuit for converting a 200 V AC power supply input to a charging voltage; A charging circuit that performs charging with a charging voltage of a circuit, an abnormal voltage detection circuit that detects that an output of the first circuit is out of a predetermined normal operation range, and an abnormal voltage detection circuit. Based on the steady state detection output, and a second circuit for blocking the AC power input.

Further, the charging apparatus of the present invention provides a small-current large-current circuit disposed at a stage preceding the first circuit for supplying the output voltage of the voltage doubler circuit or the input of a 200 V AC power supply to the charging voltage conversion circuit. A choke coil having a number of turns and a choke coil for small current provided between the output side of the first circuit and the charging voltage conversion circuit are provided.

Further, in the charging apparatus of the present invention, a storage circuit storing the equalizing charge mode is connected to the charging voltage conversion circuit, and equalizing charging is performed in the equalizing charging mode when charging is restarted.

Further, the charging device of the present invention includes a switching circuit for switching to a three-phase AC power supply input mode, and detecting a missing phase of the three-phase AC power supply input in the three-phase AC power supply input mode. A circuit is provided for stopping the charging operation when an open phase is detected.

Further, in the charging apparatus of the present invention, the user who changes the display state of the normal operation state to the display state of the abnormal operation state and the stop state based on the abnormal state detection output of the abnormal voltage detection circuit is abnormal. It is provided with display means capable of recognizing the operation state.

In the charging method of the present invention, a first step of inputting an AC power input of either a 100 V system or a 200 V system, and determining whether the AC power input is a 100 V system.
A second step of detecting whether the AC power supply is a 00V system, and, when the second step determines that the AC power supply input is a 100V system, converting the AC power supply input to a doubled voltage based on the determination. Step 3 and the commutated third
A fourth step of obtaining the output voltage of the step or the AC power input of the 200 V system, a fifth step of converting the output of the fourth step into a charging voltage, and charging by the charging voltage of the fifth step. A sixth step of performing; a seventh step of detecting that the output of the fourth step is out of a normal operating range set in advance; and the AC based on the abnormal state detection output of the seventh step. An eighth step of interrupting the power input.

Further, the storage medium for storing the charging procedure of the present invention is a first step in which an AC power supply input of either 100 V system or 200 V system is inputted,
A second step of detecting whether the system is a 00V system or a 200V system, and, when the second step determines that the AC power input is a 100V system, doubles the AC power input based on the determination. A third step of converting to voltage;
Rectified output voltage of said third step or 200
A fourth step of obtaining a V-system AC power input;
A fifth step of converting the output of the step to a charging voltage, a sixth step of charging with the charging voltage of the fifth step, and an output of the fourth step which is out of a preset normal operation range. A seventh step of detecting that the AC power has been input, and an eighth step of shutting off the AC power input based on the abnormal state detection output of the seventh step.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram of a main part of a charging apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a power supply input unit, and four connection terminals U and V for connecting to an AC 100 V (single-phase) or 200 V (single-phase, two-phase, three-phase) power supply. ,
W and GND (ground), from which power is input.

Reference numeral 2 denotes a protection circuit such as a no-fuse breaker, which is composed of switches 2a, 2b, 2c and a coil 2d. The input terminal of the switch 2a is connected to a connection terminal U, The input terminal is connected to the connection terminal V,
The input terminal of the switch section 2c is connected to the connection terminal W.

Reference numeral 3 denotes a charging device power supply for the charging device.
2b and 2c are connected to the output terminals. Basically, electric power is input to the charging device power supply 3 from the connection terminals V and W. The charging device power supply 3 has an input power of AC 100V or 200V.
Regardless of the V, there is provided a conversion means for converting the input into DC 12 V power and supplying it to each part of the charging device as operating power.

Although FIG. 1 shows that the inputs from the connection terminals U, V, W are connected to the switching circuit 25 associated with the charging device power supply 3, the switching circuit 2
5 and the input from the connection terminal U to the switching circuit 25 are configurations necessary only for achieving the fifth object of the present invention.

Reference numeral 4 denotes a display lamp, which is connected to the charging device power supply 3. The display lamp 3 is turned on while the charging device is operating normally, and is turned off when an abnormality occurs and power from the input unit 1 is cut off or when charging is completed.

Reference numerals 5a, 5b and 5c denote first choke coils for removing noise. The input terminal of the choke coil 5a is connected to the output terminal of the switch section 2a of the protection circuit 2, and the input terminal of the choke coil 5b is a switch. At the output end of the unit 2b,
The input terminal of the choke coil 5c is connected to the output terminal of the switch unit 2c. These choke coils are small, and the number of turns of each choke coil is, for example, from two to three turns to several turns. The first choke coil is provided to remove only a part of the noise included in the input power. Further, one end of a coil portion 2d of the protection circuit 2 is connected to an output terminal of the choke coil 5c.

Reference numeral 6 denotes a voltage doubler control circuit having an input connected to the output terminal of the switch 2b of the protection circuit 2 and an input connected to the output terminal of the switch 2c.
It is determined whether the input voltage from is 100 V system or 200 V system. If the input voltage is 100 V system, the current of the rectifier circuit is configured to form a voltage doubler circuit for making the input voltage a double voltage. Like switching the route, the relay RL1
To close the switch unit 7 by controlling the switch.

The rectifier circuit is a diode 1 described below.
0, 11, 12 and capacitors 13 and 14 are the main components, and the voltage doubler circuit is mainly composed of the switch 7, the diodes 10, 11, 12 and the capacitors 13 and 14 of the relay RL1. The rectifier circuit and the voltage doubler circuit constitute power conversion means (RL1, 7, 10, 11, 12, 13, 14, R1, R2).

Reference numeral 8 denotes a soft start circuit, which is provided in order to prevent sudden power from being applied to a circuit subsequent to the soft start circuit 8. The soft start circuit 8 is provided with a relay R including switch sections 9a and 9b.
L2. Each of the switch units 9a and 9b includes an open / close switch and a resistor connected in parallel.
The input terminal of the switch unit 9a is connected to the output terminal of the choke coil 5a, the input terminal of the switch unit 9b is connected to the output terminal of the choke coil 5b, and the output terminal of the switch unit 9b is connected to the input terminal of the switch unit 7 of the relay RL1. Connected to the end. The soft start circuit 8 instructs the relay RL2 to close the switches 9a and 9b after a lapse of a predetermined time from the input from the AC power supply. When the switches 9a and 9b are closed, the voltage drop at the resistor is released, and the input power is supplied to the subsequent circuit after the predetermined time.

10 is a set of diodes, including diodes 10a and 10b connected in series. Although only two diodes (10a and 10b) are shown in FIG. 1, each of the diodes 10a and 10b may be composed of a plurality of diodes. Each of 11 and 12 is also a set of rectifying diodes like the diode 10, and the diode 11 includes diodes 11a and 11b connected in series, and the diode 12 includes diodes 12a and 12b connected in series. Including. The output terminal of the switch unit 9a of the relay RL2 is connected to a connection point between the anode of the diode 10a and the cathode of the diode 10b. The input terminal of the switch unit 7 of the relay RL1 is connected to a connection point between the anode of the diode 11a and the cathode of the diode 11b. Anode of diode 12a and 12
The output terminal of the choke coil 5c is connected to the connection point of the cathode b. Further, the diodes 10a, 11a, 12
a are connected to each other and the diodes 10b, 1
The anodes 1b and 12b are connected to each other.

Reference numerals 13 and 14 denote capacitors constituting a part of the rectifier circuit and the voltage doubler circuit. The input terminals of the capacitor 13 are connected to the cathodes of the diodes 10a, 11a, and 12a via a coil for smoothing. Capacitor 13
And the capacitor 14 are connected in series. Capacitor 1
The output terminal of the diode 4 is connected to a diode 10b through a smoothing coil.
Connected to the anodes of 11b and 12b. Capacitor 1
The capacitor 3 and the capacitor 14 have the same capacity. In order to determine whether the output voltage of the power conversion means including the rectifier circuit and the voltage doubler circuit is appropriate, the voltage of the capacitor 14 is determined by an abnormal voltage detection circuit described below. Measured. A resistor R1 is connected in parallel to the capacitor 13, and a resistor R2 is connected in parallel to the capacitor 14. A relay R is connected to the output terminal of the capacitor 13 and the input terminal of the capacitor 14.
The output terminal of the switch unit 7 of L1 is connected.

Reference numeral 15 denotes an abnormal voltage detection circuit, from which the voltage across the capacitor 14 is measured in order to measure the voltage of the capacitor 14. The abnormal voltage detection circuit 15 is connected to the other end of the coil section 2d of the protection circuit 2. The abnormal voltage detection circuit 15 enables the operation of the charging device when the voltage of the capacitor 14 is within a predetermined range, and when the voltage is outside the predetermined range, the coil unit 2d of the protection circuit 2
To open the switch sections 2a, 2b, 2c, and cut off the input from the AC power supply to the charging device.

Reference numeral 16 denotes a second choke coil for removing noise that could not be removed by the first choke coil. One input terminal of the second choke coil is connected to the input terminal of the capacitor 13, and the other input terminal is connected to the other connection portion. The output terminal of the capacitor 14 is connected.

Reference numeral 17 denotes a converter (charging voltage conversion circuit) which converts 200 V DC power input from the power conversion means via the second choke coil 16 to 48 V DC power. The + (plus) input of the converter 17 is connected to the input terminal of the capacitor 13 via the choke coil 16, and the − (minus) input is connected to the output terminal of the capacitor 14 via the choke coil 16.

Reference numeral 18 denotes a known charging mechanism, which is connected to the + output and the-output of the converter 17 and supplies 48 V DC power for charging from the converter 17 to a medium to be charged, such as a battery. .

Reference numeral 20 denotes a memory and control circuit, which includes a charging device power supply 3, a voltage doubler control circuit 6, a soft start circuit 8,
Abnormal voltage detection circuit 15, converter 17, charging mechanism 18
And data, programs, and logic for controlling the overall operation of the charging device.

Reference numeral 25 denotes a switch for switching to a three-phase input only mode. The charging device power supply 3 includes a mechanism for performing AC-DC conversion of inputs from the connection terminals V and W, and connection mechanisms U and V
And a mechanism for performing AC-DC conversion of the three-phase input from W. The mechanism that operates in the three-phase input only mode is configured not to operate when there is an open phase among the three phases.

As described above, in the general state of the present embodiment, the charging device power supply 3 is connected to the connection terminals V and W, and receives power supply from those terminals. Therefore, it is necessary to connect the power input from the power supply to the connection terminals V and W of the input unit 1. This is the case when the input power is single-phase or two-phase, or when one of the three phases is missing, and the usable input is connected to the connection terminals U and V or the connection terminals U and W. In this case, it means that the charging device 3, the abnormal voltage detection circuit 15, the voltage doubler control circuit 6, and the like do not operate, and the charging device does not operate. Therefore, the user is instructed in advance to always use the connection terminals V and W. In the charging device of the present invention, when an incorrect connection is made, the charging device simply does not operate, and neither the charging device nor the medium to be charged is damaged.

FIGS. 2 and 3 show flowcharts for controlling the operation of one embodiment of the present invention.

Next, the operation of the embodiment of the charging device of the present invention will be described with reference to FIG.

First, the output section of the power supply is connected to the input section 1 of the charging device.
(Step 100).

When the input AC power is single-phase or two-phase, it is necessary to connect the input terminals 1 to the connection terminals V and W.
In the case of three phases, each input AC power is connected to connection terminals U, V,
Any of W may be connected.

The AC input from the connection terminal V is supplied to the charger power supply 3 via the switch 2b of the protection circuit 2,
The AC input from the connection terminal W is connected to the switch 2 of the protection circuit 2.
The power is supplied to the charging device power supply 3 via c. The charging device power supply 3 converts the input AC power into DC 12 V (step 110). Each part of the charging device, that is, the display lamp 4, the voltage doubler control circuit 6, the soft start circuit 8, the abnormal voltage detection circuit 15, the converter 1
7, and the memory and control circuit 20 and the like operate.

When power is input to the charging device, the indicator lamp 4 is lit to indicate that power is being supplied and that the charging device has started operation (step 120), and the converter 17 is started (step 120). Step 130).

Next, the voltage doubler control circuit 6 connected downstream of the switches 2b and 2c of the protection circuit 2 connected to the connection terminals V and W detects the voltage of the AC input (step 1).
40) In accordance with the instruction of the memory and control circuit 20, it is checked whether the voltage of the AC input is 100V or 200V (step 150).

First, the case where the input voltage is a 100 V system will be described. The voltage doubler control circuit 6 detects that the input voltage is 100 V, and instructs the relay RL1 to close the switch unit 7. When the switch section 7 is closed, the switch section 7, the diode 12, the capacitors 13 and 1 are closed.
4 and a voltage doubler circuit composed of resistors R1 and R2 are formed (step 160A).

Thus, (A) connection terminal V, switch section 2b of protection circuit 2, choke coil 5b, relay R
The resistance of the switch section 9b of L2, the switch section 7 of the relay RL1, the capacitor 14 and the resistance R2 connected in parallel,
A first current path sequentially passing through the diode 12b, the choke coil 5c, the switch 2c of the protection circuit 2, and the connection terminal W; and (B) the connection terminal W, the switch 2c of the protection circuit 2, the choke coil 5c, the diode 12a, a capacitor 13 and a resistor R1 connected in parallel, a relay RL
1, the resistance of the switch 9b of the relay RL2, the choke coil 5b, and the switch 2 of the protection circuit 2.
b, a second current path passing through the connection terminal V in order is formed. At this point, the switch unit 9a of the relay RL2
And 9b are open, so that a current path is formed through the resistance of the switch section.

A predetermined time after the above-mentioned current path is formed, the soft start circuit 8 operates according to an instruction from the memory and control circuit 20, and instructs the relay RL2 to close the switches 9a and 9b. As a result, the above-described resistor is short-circuited, and power of AC 100 V is input to the voltage doubler circuit.

When the voltage at the connection terminal V is a positive half cycle, the input passes through the first current path. On the way, noise during AC input is partially removed by the choke coil 5b. The AC input from which noise has been partially removed is rectified by the rectifying action of the diode 12b and stored in the capacitor 14. In the case of a negative half cycle,
Noise during input from the connection terminal W is a choke coil 5c.
Is partially removed. The partially noise-free AC input is rectified by the diode 12 a and stored in the capacitor 13. Electric power is accumulated by these alternate half cycles, and as a result, 200 V DC power is generated by the voltage conversion means (rectifier circuit and voltage doubler circuit).

Next, a case where the AC input voltage is 200 V will be described. The double voltage control circuit 6 has an input of 200
V, and instructs the relay RL1 to open the switch unit 7. When the switch unit 7 is open, the voltage doubler circuit is not configured, and only the rectifier circuit is configured (step 160B).

When the switch section 7 is open, (A)
The connection terminal U, the switch 2a of the protection circuit 2, the choke coil 5a, the resistance of the switch 9a of the relay RL2, the diode 10a, the capacitor 13 and the resistor R1, which are connected in parallel, and the capacitor 14 and the resistor R2 which are connected in parallel. In this order, the diode 11b, the resistance of the switch unit 9b of the relay RL2, the choke coil 5b, and the protection circuit 2
A first current path passing through the switch section 2b and the connection terminal V in this order or through the diode 12b, the choke coil 5c, and the switch section 2c and the connection terminal W of the protection circuit 2 in sequence, and (B) the connection terminal V and the protection circuit 2 switch section 2b,
The choke coil 5b, the resistance of the switch 9b of the relay RL2, the diode 11a, the capacitor 13 and the resistor R1 connected in parallel, the capacitor 14 and the resistor R2 connected in parallel, and then the diode 10b and the switch of the relay RL2. The resistance of the portion 9a, the choke coil 5a,
The switch section 2a and the connection terminal U of the protection circuit 2 are sequentially arranged, or the diode 12b, the choke coil 5c, and the protection circuit 2
(C) the connection terminal W, the switch 2c of the protection circuit 2, the choke coil 5c, the diode 12a, the capacitor 13 connected in parallel, and the resistor. R1, the capacitor 14 and the resistor R2 connected in parallel, in order, and the diode 10b, the resistor of the switch 9a of the relay RL2, the choke coil 5a, and the switch 2a of the protection circuit 2
And the connection terminal U in order, or the diode 11b, the resistance of the switch 9b of the relay RL2, the choke coil 5b,
A third current path is formed that sequentially passes through the switch section 2b and the connection terminal V of the protection circuit 2. At this time, since the switches 9a and 9b of the relay RL2 are in an open state, each current path is formed via the resistance of the switch.

A predetermined time after the formation of the first, second and third current paths, the soft start circuit 8 is activated by the instruction of the memory and control circuit 20, and the relay RL2 is activated.
To close the switches 9a and 9b. As a result, the resistance in the current path is short-circuited.
V power is input to the rectifier circuit.

The rectifier circuit has the same configuration as that of the conventional rectifier circuit. The power of 200 V AC is converted to the power of 200 V DC, and the voltage across the capacitors 13 and 14 connected in series becomes 200 V.

As described above, automatically switching the input voltage according to the input system is one of the features of the present invention.

In this state, the charging operation is performed. At the same time, the detection of the abnormal voltage, which is one of the features of the present invention, is performed.

First, the abnormal voltage is monitored by monitoring the voltage of the capacitor 14 after a lapse of 5 seconds from the transient state immediately after the first and second current paths are formed to the steady state. (Steps 170, 180, 1
90).

When the abnormal voltage detection circuit 15 detects that the voltage of the capacitor 14 has become 83 V or less or 132 V or more, it activates the coil 2 d to switch the switches 2 a, 2 b and 2 c of the protection circuit 2. Open, connection terminals V and W
(And U) is shut off, and the operation of the charging device is stopped (step 220). This is 83 V to 132 V for a 100 V input, and 166 V to 2 V for a 200 V input.
64V is set in the normal operation range. This prevents the charging device and the medium to be charged from being damaged due to an abnormal voltage generated due to an incorrect connection or the like at the time of input. When the AC input is cut off, the display lamp 4 turns off, indicating that the operation of the charging device has stopped (step 230). The above set values (83 V and 132 V)
Is an example, and is determined according to characteristics of an AC power supply, a circuit of a charging device, a medium to be charged, and the like.

On the other hand, when the voltage of the capacitor 14 is in the range of 83 V or more and 132 V or less, the power of 200 V DC is supplied to the converter 17 via the second choke coil 16 for removing the remaining noise. Sent.

The converter 17 has a high precision constant current and constant voltage D.
A C-DC converter, and the second choke coil 16
200V DC power input via
And outputs it to the charging mechanism 18. The output of the charging mechanism 18 is connected to a medium to be charged, for example, a terminal of a battery. If there is no abnormality in the charging device, charging is started (step 200). Further, a memory and control circuit 20 is connected to the charging mechanism 18.
After the start of charging, the memory and control circuit 20 checks the charging voltage of the charging medium via the charging mechanism 18 (step 2).
10) When a predetermined voltage is detected, that is, when charging is completed, an instruction to stop converter 17 is given, and at the same time, an instruction to turn off display lamp 4 is given (step 230).

Thus, the user can determine the operating state of the charging device from outside.

Further, the charging device of the present invention automatically performs equal charging when restarting equal charging. The charging device is a converter 17
In addition to the means for converting a 200V input to 48V, a conversion means for uniform charging for converting a 200V input to power of a voltage and current slightly higher than 48V is provided. Further, as described above, the control program for the equal charge mode is stored in the memory and the control circuit 20, and when the user instructs the equal charge from the outside, the equal charge mode is performed. Further, the instruction for equal charging is stored in the memory and control circuit 20. In this state, equal charging is performed according to a user's equal charging instruction, but power failure, occurrence of abnormal voltage,
When the input power for charging the charging device is cut off due to a three-phase input loss or the like, the charging operation is stopped, and when the charging operation is restarted due to repair or the like, the memory and control circuit 20 are equally charged. In the charging mode, the equal charging is restarted, and the equal charging is performed until a predetermined equal charging time is reached or the charged battery reaches a predetermined voltage. When the equal charge is completed, the memory and control circuit 20 is reset, and the stored equal charge instruction is released.

Further, a case will be described in which the charging apparatus of the present invention is used to detect an open phase of an input from a three-phase AC power supply and stop charging.

First, before connecting the three-phase AC power supply to the charging device, the user switches the switch of the switching circuit (25) to three-phase (step 300). As a result, the charging device power supply 3 converts the three-phase input from the connection terminals U, V, and W from the first conversion mechanism that performs AC-DC conversion of the input from the connection terminals V and W to the second conversion mechanism that performs AC-DC conversion.
Switch to conversion mechanism. Monitoring of the presence or absence of an open phase during AC input is always performed by the second conversion mechanism during operation of the charging device (step 320). If there is no phase loss, the connection terminal V
And the AC input from W is converted to DC 12V (step 330). This causes indicator lamp 4 to illuminate to indicate that AC input is being supplied and that the charging device has been activated (step 340), and
Is activated (step 350). The operation after this step, that is, the operation after step 360 encircled in FIG. 3 is the same as the operation after step 360 encircled in FIG.

If an open phase is found in step 320, the operation of the charging device is stopped by stopping the second conversion mechanism of the charging device power supply (3) and stopping the operation power supplied to converter 17. Stops and the indicator lamp (4) goes out at the same time.

[0067]

According to the configuration of the present invention, the charging device is configured to: (1) receive input from both a 100 V system and a 200 V system power source; therefore, the connection between the power source and the charging device is appropriate; It is no longer necessary to consider whether or not the charging device is incorrectly connected to the power supply, and (2) the size of the charging device is reduced due to the provision of the noise removing means that is small and easy to install, and The manufacturing process is simplified, (3) when an abnormality occurs in the charging device, it can be easily confirmed, (4) complete uniform charging can be performed by automatic control, and (5) charging with power from a three-phase power supply Is performed, it is possible to confirm that there is an open phase, and to stop the incomplete charging operation of the charging device, so that it is possible to perform more complete charging.

[Brief description of the drawings]

FIG. 1 is a schematic circuit diagram of a charging device of the present invention.

FIG. 2 is a flowchart of the operation of the charging device of the present invention.

FIG. 3 is a flowchart of an operation of the charging apparatus of the present invention including a switching unit for switching to a circuit for checking whether a phase is missing in three phases.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Input part 2 Protection circuit 2a, 2b, 2c Switch part of protection circuit 2d Coil part of protection circuit 3 Charger power supply 4 Indicator lamp 5 First choke coil 6 Voltage multiplier circuit 7 Switch part of relay RL1 8 Soft start circuit 9a, 9b Switch section of relay RL2 10 (10a, 10b), 11 (11a, 11b), 12 (12a, 12b)
Diodes 13, 14 Capacitors 15 Abnormal voltage detector 16 Second choke coil 17 Converter 18 Charging mechanism 20 Memory and control circuit 25 Switching circuit RL1, RL2 Relay R1, R2 Resistance

Claims (7)

[Claims] 1. A charging device for performing charging by rectifying an AC power supply input of either a 100V system or a 200V system to DC, and detecting a double voltage detecting whether the AC power supply input is a 100V system or a 200V system. A control circuit; a voltage doubler circuit for converting the AC power supply input to a doubled voltage based on the determination when the voltage doubler control circuit determines that the AC power supply input is a 100 V system; and an output of the voltage doubler circuit. A first circuit for providing a charging voltage conversion circuit for converting a voltage or a 200 V AC power supply input to a charging voltage; a charging circuit for performing charging with the charging voltage of the charging voltage conversion circuit; and an output of the first circuit. An abnormal voltage detection circuit that detects that the normal operation range is out of the predetermined range, based on an abnormal state detection output of the abnormal voltage detection circuit,
A second circuit that cuts off the AC power input. 2. The output voltage of the voltage doubler circuit or 200
A choke coil having a small number of turns for a large current and arranged at a stage preceding the first circuit for supplying a V-system AC power supply to the charging voltage conversion circuit; an output side of the first circuit and the charging voltage conversion circuit The charging device according to claim 1, further comprising: a choke coil for small current provided between the charging device and the circuit. 3. The charging device according to claim 1, wherein a storage circuit storing an equalizing charge mode is connected to the charging voltage conversion circuit, and equalizing charging is performed in the equalizing charging mode when charging is restarted. . 4. A switching circuit for switching to a three-phase AC power supply input mode, wherein in the three-phase AC power supply input mode, when a phase loss of the three-phase AC power supply input is detected, and when the open phase is detected, The charging device according to claim 1, further comprising a circuit for stopping a charging operation. 5. A display in which a display state of a normal operation state changes to a display state of an abnormal operation state and a stop state based on an abnormal state detection output of the abnormal voltage detection circuit. The charging device according to claim 1, 2, 3, or 4, further comprising means. 6. A first step of inputting either an AC power input of a 100 V system or a 200 V system, a second step of detecting whether the AC power input is a 100 V system or a 200 V system, When the second step determines that the AC power input is a 100 V system, a third step of converting the AC power input to a doubled voltage based on the determination; and a third step of rectifying the third step. Output voltage or 200
A fourth step of obtaining a V-system AC power input, a fifth step of converting the output of the fourth step into a charging voltage, and a sixth step of charging with the charging voltage of the fifth step. A seventh step of detecting that the output of the fourth step is out of the normal operation range set in advance, and a step of shutting off the AC power input based on the abnormal state detection output of the seventh step. 8. A charging method, comprising: 7. A first step of inputting either an AC power input of a 100V system or a 200V system, a second step of detecting whether the AC power input is a 100V system or a 200V system, When the second step determines that the AC power input is a 100 V system, a third step of converting the AC power input to a doubled voltage based on the determination; and a third step of rectifying the third step. Output voltage or 200
A fourth step of obtaining a V-system AC power input, a fifth step of converting the output of the fourth step into a charging voltage, and a sixth step of charging with the charging voltage of the fifth step. A seventh step of detecting that the output of the fourth step is out of the normal operation range set in advance, and a step of shutting off the AC power input based on the abnormal state detection output of the seventh step. A storage medium storing the steps of: