TWI483511B - The battery charging apparatus and battery charging method - Google Patents

Description

Battery charging device and battery charging method Technical field

The present invention relates to a battery charging device and a battery charging method.

Background technique

Heretofore, there has been a battery charging device that can supply a power source for charging a battery by using an AC voltage output of a generator driven by an engine such as a locomotive, and a power source for lighting a lamp such as a headlight.

Here, FIG. 5 shows an example of the configuration of a conventional battery charging system 1000A. Further, Fig. 6 shows an example of an operation waveform of the conventional battery charging device 100A shown in Fig. 5.

As shown in FIG. 5, the battery charging device 100A used in the conventional battery charging system 1000A includes a generator terminal TA that connects a coil of a single-phase alternator A to ground, and a lamp terminal that connects the lamp L to the ground. TL, the battery terminal TB of the battery B is connected to the ground, the ground terminal TE connected to the ground, the first thyristor S1, and the second sluice fluid S2 (see, for example, Japanese Patent No. 4597194, No. 4480817).

When the output voltage of the generator terminal TA is positive, the second thyristor S2 is turned on when the battery voltage of the battery B is less than the predetermined voltage. Thereby, the positive side component of the output voltage of the single-phase alternator A can be supplied to the battery B to charge the battery B (X of FIG. 6). At this time, the output voltage is the sum of the battery voltage V _BAT and the voltage VT _S2 of the second thyristor S2.

Further, when the output voltage of the generator terminal TA is negative, the first thyristor S1 is turned on when the effective value (or average voltage) of the lamp voltage of the lamp L is lower than the target voltage. Thereby, the negative side component of the output voltage of the single-phase alternator A can be supplied to the lamp L (Y of FIG. 6).

Here, for example, when the power generated by the single-phase AC generator A is insufficient with respect to the power consumption of the lamp L, once the load of the lamp L is increased, the effective voltage (or average voltage) of the lamp voltage is lowered. Next, when the conduction time of the second thyristor S2 is extended for charging the battery B, a sufficient power source cannot be supplied to the lamp L via the first thyristor S1. That is, the brightness of the lamp L will decrease.

As described above, the conventional battery charging device 100A may lower the brightness of the lamp L due to variations in the load of the lamp L or the like.

Invention

The battery charging device according to an embodiment of the present invention can control the charging of the battery and the power supply of the lamp by the single-phase alternator, and is characterized in that: the generator terminal is connected, and the foregoing single wire is connected between the ground and the ground. a coil of the alternating current generator; a lamp terminal connecting the lamp to the ground; the battery terminal connecting the battery to the ground; the first switching element connecting the first node to the lamp terminal, and the foregoing The generator terminal is connected to the second node; the second switching element is connected to the first node to the generator terminal, and the second node is connected to the battery terminal; a switching element that connects the first node to the generator terminal and connects the second node to the lamp terminal; and the control circuit controls the first to the first to output signals to the gates of the first to third switching elements The operation of the switching element; when the output voltage of the generator terminal outputted by the single-phase alternator is the first polarity, the control circuit will not compare the effective value or the average value of the lamp voltage of the lamp terminal When the target voltage is full, the first switching element is turned on, and when the output voltage is the second polarity, the control circuit turns on the third switching element when the comparison value is less than a threshold voltage of the target voltage. And when the battery voltage of the battery is less than a predetermined voltage, the second switching element is turned on.

In the battery charging device described above, the first switching element may be a first thyristor, the second switching element may be a second thyristor, and the third switching element may be a third thyristor.

In the battery charging device, the first polarity of the output voltage may be a negative polarity of the output voltage, and the second polarity of the output voltage may be a positive polarity of the output voltage, and the first to third thyristors may be The first node-based anode, the second node-based cathode of the first to third thyristors, wherein the control circuit turns off the second thyristor and the third thyristor when the output voltage is the first polarity When the comparison value is less than the target voltage, the first thyristor is turned on, and when the comparison value is equal to or higher than the target voltage, the first thyristor is turned off, and when the output voltage is the second polarity, The control circuit turns off the first thyristor, and when the comparison value is less than the threshold voltage, the third thyristor is turned on, and when the comparison value is equal to or higher than the threshold voltage, the aforementioned In the third sluice fluid, when the battery voltage of the battery is less than the predetermined voltage, the second thyristor is turned on, and when the battery voltage of the battery is equal to or higher than the predetermined voltage, the second thyristor is turned off.

In the battery charging device described above, the size of the third thyristor may be smaller than the size of the first thyristor.

In the battery charging device, the control circuit may include: an arithmetic circuit capable of detecting a lamp voltage of the lamp terminal, and calculating and outputting the measured value as the effective value or the average value of the lamp voltage; The threshold voltage generating circuit generates and outputs the threshold voltage; the differential voltage generating circuit generates a differential voltage, and outputs the target voltage obtained by adding the differential voltage to the threshold voltage; and the first comparison circuit can correspond to the calculation circuit And comparing the output comparison value with the target voltage output by the differential voltage generating circuit and the polarity of the output voltage to output a signal to the gate of the first switching element; and the second comparison circuit can correspond to the foregoing The comparison result outputted by the calculation circuit is compared with the threshold voltage outputted by the threshold voltage generation circuit and the polarity of the output voltage, and the signal is output to the gate of the third switching element.

In the battery charging device, when the output voltage is the first polarity, the first comparison circuit may output a signal to the gate of the first switching element when the comparison value is less than the target voltage to be turned on. In the first switching element, when the comparison value is equal to or higher than the target voltage, the signal is output to the gate of the first switching element to turn off the first switching element, and the second comparison circuit is turned to the third Gate of switching element And outputting a signal to disconnect the third switching element, wherein when the output voltage is the second polarity, the first comparison circuit outputs a signal to a gate of the first switching element to turn off the first switching element, and When the comparison value is less than the threshold voltage, the second comparison circuit outputs a signal to the gate of the third switching element to turn on the third switching element, and when the comparison value is equal to or higher than the threshold voltage, The signal is output to the gate of the third switching element to turn off the third switching element.

A battery charging method according to an embodiment of the present invention is characterized in that it is performed by a battery charging device that can control charging of a battery and power supply of a lamp by a single-phase alternator, and includes a generator terminal for connecting a coil of the single-phase alternator between the ground and the ground; a lamp terminal connecting the lamp to the ground; and a battery terminal connecting the battery to the ground; the first switch component a first node is connected to the lamp terminal, and a second node is connected to the generator terminal; a second switch element is connected to the first node to the generator terminal, and a second node is connected to the battery terminal; and, the third node a switching element that connects the first node to the generator terminal and connects the second node to the lamp terminal; the method is when the output voltage of the generator terminal output from the single-phase alternator is the first polarity When the comparison value of the effective value or the average value of the lamp voltage as the lamp terminal is less than the target voltage, the first switching element is turned on, and When the output voltage is the second polarity, when the comparison value is less than the threshold voltage of the target voltage, the third switching element is turned on, and when the battery voltage of the battery is less than a predetermined voltage, the second is turned on. Switching element.

The battery charging device of one aspect of the present invention can control the charging of the battery and the power supply of the lamp by the single-phase alternator. The battery charging device further comprises: a generator terminal, the coil of the single-phase alternator is connected between the ground and the ground; the lamp terminal is connected between the ground and the ground; the battery terminal is connected to the ground; the first The thyristor is connected to the cathode of the generator terminal and connected to the anode of the lamp terminal; the second thyristor is connected to the anode of the generator terminal and connected to the cathode of the battery terminal; the third thyristor is connected to the anode of the generator terminal, and The lamp terminal is connected to the cathode; and the control circuit controls the action of the first to third thyristors.

Secondly, when the output voltage of the generator terminal outputted by the single-phase alternator is negative, the control circuit turns on the first gate when the comparison value of the effective value or the average value of the lamp voltage as the lamp terminal is less than the target voltage. fluid. When the output voltage is positive, the control circuit turns on the third thyristor when the comparison value is less than the threshold voltage of the target voltage, and turns on the second thyristor when the battery voltage of the battery is less than the predetermined voltage.

Thereby, the positive side component of the output voltage of the single-phase alternator can be supplied to the battery to charge the battery. Moreover, the negative side component of the output voltage of the single-phase alternator can be supplied to the luminaire. Further, when the effective value or the average value of the lamp voltage is less than the threshold voltage, at least a part of the positive side component of the output voltage of the single-phase alternator can be supplied to the lamp.

Therefore, for example, when the load of the lamp is changed to reduce the effective value or the average value of the lamp voltage, the effective value or the average value of the lamp voltage can be made closer to the target voltage.

That is, according to one aspect of the battery charging device of the present invention, a loan can be borrowed Recharge the battery with an alternator and suppress the decrease in brightness of the luminaire.

100‧‧‧Battery charging device

100A‧‧‧Battery charging device

1000‧‧‧Battery Charging System

1000A‧‧‧Battery Charging System

A‧‧‧ single phase alternator

AC‧‧‧ calculus circuit

B‧‧‧Battery

BC‧‧‧Battery voltage adjustment circuit

C1‧‧‧1st comparison circuit

C2‧‧‧2nd comparison circuit

CON‧‧‧Control circuit

DVG‧‧‧Differential voltage generation circuit

L‧‧‧Lamps

R‧‧‧ load

S1‧‧‧1st brake fluid

S2‧‧‧2nd thyristor

S3‧‧‧3rd thyristor

T0~t8‧‧‧ moment

TA‧‧‧ Generator Terminal

TR‧‧‧ battery terminal

TE‧‧‧ grounding terminal

TL‧‧‧Lighting terminal

TVG‧‧‧critical voltage generation circuit

V _BAT ‧‧‧Battery voltage

VT _S2 ‧‧‧ voltage

Fig. 1 shows an example of the configuration of a battery charging system 1000 according to a first embodiment of the present invention.

Fig. 2 is a waveform diagram showing an example of an operation waveform of the battery charging device 100 shown in Fig. 1.

Fig. 3 shows an example of the relationship between the number of revolutions of the single-phase alternator A and the effective value of the lamp voltage in the fully charged state of the battery B.

Fig. 4 shows an example of the relationship between the number of rotations of the single-phase alternator A and the effective value of the lamp voltage in the state in which the battery B is charged (the battery voltage is less than the predetermined voltage).

FIG. 5 shows an example of the configuration of a conventional battery charging system 1000A.

Fig. 6 shows an example of an operation waveform of the conventional battery charging device 100A shown in Fig. 5.

The best form for implementing the invention

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In addition, the anode of the thyristor is the first node, the cathode of the thyristor is the second node, and the negative polarity of the output voltage of the single-phase alternator is the first polarity, and the single-phase alternator is used. The positive polarity of the output voltage is the second polarity, which will be described.

However, the anode of the thyristor is also the second node, and the cathode of the thyristor is the first node, and the negative polarity of the output voltage of the single-phase alternator is the second polarity, and the single-phase alternator is used. Positive electrode of output voltage The sex is the first polarity, and the same is explained.

[First Embodiment]

Fig. 1 shows an example of the configuration of a battery charging system 1000 according to a first embodiment of the present invention.

As shown in FIG. 1, the battery charging system 1000 includes a battery B, a load R, a single-phase alternator A, and a battery charging device 100.

The single-phase alternator A includes a coil that is grounded at one end and connected to the generator terminal TA of the battery charging device 100 at the other end.

The single-phase AC generator A described above can generate an AC voltage for charging the battery B and illuminating the lamp L, and can supply the AC voltage from the output terminal.

The single-phase alternator A described above is an alternator directly driven by an engine of a locomotive.

The battery B includes a + terminal (positive side) and a - terminal (negative side), and can be charged and discharged via the terminals. In addition, the negative side of the battery B is grounded, and the positive side of the battery B is connected to the battery terminal TB of the battery charging device 100. The above battery B is a battery such as a locomotive.

One end of the lamp L is grounded and the other end is connected to the lamp terminal TL of the battery charging device 100. The above-mentioned lamps L are lamps such as locomotive headlights and taillights. At this time, the load of the lamp L is changed (increased) by the operation of the high beam or the like.

The load R is connected between the ground and the battery terminal TB. The above load R is a vehicle load such as a device requiring power in a locomotive.

Moreover, the battery charging device 100 can be a single-phase alternator A The AC current outputted from the output terminal is rectified, and the charging of the battery B by the single-phase AC generator A and the lighting of the lamp L (power supply) are controlled.

Here, as shown in FIG. 1, the battery charging device 100 includes, for example, a generator terminal TA, a lamp terminal TL, a battery terminal TB, a ground terminal TE, a first thyristor (first switching element) S1, and a second thyristor ( The second switching element) S2, the third thyristor (third switching element) S3, and the control circuit CON.

The generator terminal TA is connected to the coil of the single-phase alternator A between the ground and the ground.

The lamp terminal TL is connected to the lamp L between the ground and the ground.

Battery terminal TB is connected to battery B between ground and ground.

The ground terminal TE is grounded.

The first thyristor S1 is connected to the anode (first node) to the lamp terminal TL, and is connected to the cathode (second node) to the generator terminal TA.

As will be described later, when the output voltage of the generator terminal TA is negative (first polarity), when the comparison value of the effective value or the average value of the lamp voltage as the lamp L is lower than the target voltage, the first sluice fluid S1 will be described later. Turn on. Thereby, the negative side component of the output voltage of the single-phase alternator A can be supplied to the lamp L.

The second thyristor S2 is connected to the anode (first node) to the generator terminal TA and to the cathode (second node) to the battery terminal TB.

Here, as will be described later, when the output voltage of the generator terminal TA is positive (second polarity), the second thyristor S2 is turned on when the battery voltage of the battery B is less than a predetermined voltage. Thereby, the positive side component of the output voltage of the single-phase alternator A can be supplied to the battery B to charge the battery B.

Further, when the output voltage is positive, the second thyristor S2 will When the battery voltage of the battery B is equal to or higher than the predetermined voltage, it is turned off. Thereby, overcharging of the battery B can be avoided.

The third sluice fluid S3 is connected to the anode (first node) to the generator terminal TA, and is connected to the cathode (second node) to the lamp terminal TL.

Here, as will be described later, when the output voltage of the generator terminal TA is positive, the third thyristor S3 will be turned on only when the comparison value of the effective value or the average value of the lamp voltage of the lamp L is lower than the threshold voltage. . Thereby, the positive side component of the output voltage of the single-phase alternator A can be supplied to the lamp L. That is, at least a part of the positive side component of the output voltage originally supplied to the battery B can be supplied to the lamp L.

As described above, when the effective value or the average value of the lamp voltage is lower than the threshold voltage, the third thyristor S3 can perform an auxiliary operation in order to make the effective value or the average value of the lamp voltage close to the target voltage. Therefore, the capacity of the third thyristor S3 may be smaller than the capacity of the first thyristor S1.

Therefore, in order to reduce the circuit area of the battery charging device 100, for example, the size of the third thyristor S3 can be set smaller than the size of the first thyristor S1.

Further, the control circuit CON outputs a signal to the gates of the first to third thyristors S1, S2, and S3 based on the voltages of the respective terminals TA, TL, TB, and TE to control the first to third thyristors S1. The action of S2 and S3.

The above control circuit CON can detect the battery voltage of the battery B based on a voltage such as the battery terminal TB and the ground terminal TE.

Moreover, the control circuit CON can calculate the effective voltage of the lamp as the lamp terminal TL based on the voltage such as the lamp terminal TL and the ground terminal TE. A comparison of values or averages. For example, the control circuit CON can calculate the effective value or the average value of the potential difference between the lamp terminal TL and the ground terminal TE, and output the calculated value as a comparison value.

Further, the control circuit CON can detect the polarity of the voltage of the generator terminal TA (the output voltage of the single-phase alternator A) based on the voltage such as the generator terminal TA and the ground terminal TE. For example, the control circuit CON can detect the polarity of the voltage of the generator terminal TA (the output voltage of the single-phase alternator A) from the potential relationship between the generator terminal TA and the ground terminal TE.

Here, as shown in FIG. 1, the control circuit CON includes an arithmetic circuit AC, a threshold voltage generating circuit TVG, a differential voltage generating circuit DVG, a first comparing circuit C1, a second comparing circuit C2, and a battery voltage adjusting circuit BC.

The calculation circuit AC can detect the lamp voltage of the lamp terminal TL, and calculate and compare the effective value or the average value of the measured lamp voltage.

The threshold voltage generating circuit TVG can generate and output a threshold voltage.

The differential voltage generating circuit DVG generates a differential voltage and outputs a target voltage obtained by adding the differential voltage to the threshold voltage.

The first comparison circuit C1 can correspond to the comparison result of the comparison value outputted by the calculation circuit AC and the target voltage output by the differential voltage generation circuit DVG and the polarity of the voltage of the generator terminal TA (the output voltage of the single-phase alternator A). The signal is output to the gate of the first gate fluid S1.

For example, when the output voltage is negative, the first comparison circuit C1 will output a signal to the gate of the first thyristor S1 to turn on the first thyristor S1 when the comparison value is less than the target voltage, and to the gate of the first thyristor S1 when the comparison value is greater than the target voltage. The pole outputs a signal to disconnect the first thyristor S1.

When the output voltage is positive, the first comparison circuit C1 outputs a signal to the gate of the first thyristor S1 to turn off the first thyristor S1.

The second comparison circuit C2 can correspond to the comparison result of the comparison value output by the calculation circuit AC and the threshold voltage output by the threshold voltage generation circuit TVG and the polarity of the voltage of the generator terminal TA (the output voltage of the single-phase alternator A). And the gate output signal of the third gate fluid S3.

For example, when the output voltage is negative, the second comparison circuit C2 outputs a signal to the gate of the third thyristor S3 to turn off the third thyristor S3.

When the output voltage is positive, the second comparison circuit C2 outputs a signal to the gate of the third thyristor S3 to turn on the third thyristor S3 when the comparison value is less than the threshold voltage, and the comparison value is critical. When the voltage is higher than the voltage, the signal is output to the gate of the third thyristor S3 to turn off the third thyristor S3.

The battery voltage adjustment circuit BC outputs a signal to the gate of the second thyristor S2 in accordance with the polarity of the battery voltage and the voltage of the generator terminal TA (the output voltage of the single-phase alternator A).

For example, when the output voltage is negative, the battery voltage adjustment circuit BC outputs a signal to the gate of the second thyristor S2 to turn off the second thyristor S2.

When the output voltage is positive, the battery voltage adjustment circuit BC outputs a signal to the gate of the second thyristor S2 to turn on the second thyristor S2 when the battery voltage is less than the predetermined voltage, and the battery voltage is regulated. Voltage In the above case, the signal is output to the gate of the second thyristor S2 to turn off the second thyristor S2.

Hereinafter, an example of a battery charging method employed in the battery charging device 100 constituting the battery charging system 1000 described above will be described.

Here, FIG. 2 is a waveform diagram showing an example of an operation waveform of the battery charging device 100 shown in FIG. 1. In addition, in FIG. 2, although the case where the effective value of the lamp voltage is used for the comparison value is taken as an example, the comparison value may be an average value of the lamp voltage.

As shown in FIG. 2, when the output voltage of the generator terminal TA outputted by the single-phase alternator A is negative (such as time t0~t2), the control circuit CON will be the effective value of the lamp voltage as the lamp terminal TL. The comparison value is less than the target voltage (time t0), and the first thyristor S1 is turned on (time t1 to t2).

Thereby, the negative side component of the output voltage of the single-phase alternator A can be supplied to the lamp L.

When the output voltage is negative (time t0 to t2), the control circuit CON turns off the second thyristor S2 and the third thyristor S3 (time t0 to t2).

Then, when the output voltage is positive (such as time t2 to t4), although not shown, the battery voltage of the battery B is less than the predetermined voltage, and the control circuit CON turns on the second thyristor S2 (time t3 to t4). . At this time, the output voltage is the sum of the battery voltage V _BAT and the voltage VT _S2 of the second thyristor S2.

Thereby, the positive side component of the output voltage of the single-phase alternator A can be supplied to the battery B to charge the battery B.

Further, when the output voltage is positive (time t2 to t4), the control circuit CON sets the comparison value (effective value) to be equal to or higher than the threshold voltage (time t2). The third sluice fluid S3 is turned off (time t2 to t4).

When the output voltage is positive (time t2 to t4), the control circuit CON turns off the first thyristor S1.

Then, when the output voltage is negative (such as time t4 to t5), the control circuit CON turns on the first thyristor S1 (time t4 to t5) because the comparison value (effective value) is less than the target voltage (time t4).

Thereby, the negative side component of the output voltage of the single-phase alternator A can be supplied to the lamp L.

When the output voltage is negative, the control circuit CON turns off the second thyristor S2 and the third thyristor S3 (time t4 to t5).

Then, when the output voltage is positive (such as time t5 to t8), the control circuit CON is not shown, but the battery voltage of the battery B is less than the predetermined voltage, and the second thyristor S2 is turned on (time t6 to t8).

Thereby, the positive side component of the output voltage of the single-phase alternator A can be supplied to the battery B to charge the battery B.

Further, when the output voltage is positive (time t5 to t8), the control circuit CON turns on the third thyristor S3 (time t7 to t8) because the comparison value (effective value) is less than the threshold voltage (time t5).

Thereby, the positive side component of the output voltage of the single-phase alternator A can be supplied to the lamp L. As a result, the effective value of the lamp voltage can be made closer to the target voltage.

When the output voltage is positive (time t5 to t8), the control circuit CON turns off the first thyristor S1.

In addition, although not shown in the example of FIG. 2, the output voltage is positive polarity. When the battery voltage of the battery B is equal to or higher than the predetermined voltage, the control circuit CON turns off the second thyristor S2. Thereby, overcharging of the battery B can be avoided.

Subsequently, by repeating the same operation of the battery charging device 100, the battery B can be charged to a predetermined voltage, and the effective value or the average value of the lamp voltage is maintained at a state closer to the target voltage.

Here, FIG. 3 shows an example of the relationship between the number of rotations of the single-phase alternator A and the effective value of the lamp voltage in the fully charged state of the battery B. Further, Fig. 4 shows an example of the relationship between the number of rotations of the single-phase alternator A and the effective value of the lamp voltage in the state in which the battery B is charged (the battery voltage is less than the predetermined voltage).

As shown in FIGS. 3 and 4, in the conventional battery charging device 100A, when the number of rotations of the single-phase alternator A increases and the conduction period of the first thyristor S1 is shortened, the effective value of the lamp voltage is lowered.

The tendency to reduce the effective value of the lamp voltage described above tends to be conspicuous due to the increased power consumption of the lamp L. Further, when the battery voltage is less than the predetermined voltage and the period during which the second thyristor S2 is turned on is extended (FIG. 4), the tendency tends to be conspicuous.

Further, in the battery charging device 100 of the embodiment, even if the number of rotations of the single-phase alternator A increases and the conduction period of the first thyristor S1 is shortened, the third sluice fluid S3 can be supplied to the lamp L in an auxiliary manner. Almost no reduction in the effective value of the lamp voltage (Fig. 3, Fig. 4).

As described above, in the battery charging device of the embodiment, for example, even if the power generated by the single-phase AC generator A is insufficient with respect to the power consumption of the lamp L, the decrease in the effective value of the lamp voltage can be suppressed.

As described above, the battery charging apparatus of one aspect of the present invention can control the charging of the battery and the power supply of the lamp by the single-phase alternator. The battery charging device includes a generator terminal that connects a coil of the single-phase alternator with the ground, a lamp terminal that connects the lamp between the ground, a battery terminal that connects the battery between the ground, and a generator terminal. a cathode connected to the cathode and connected to the first thyristor of the anode of the lamp, a second sluice fluid connected to the anode of the generator terminal and connected to the cathode of the battery terminal, a third sluice fluid connected to the anode of the generator terminal, and a cathode connected to the lamp terminal, A control circuit that controls the operation of the first to third thyristors.

Secondly, when the output voltage of the generator terminal outputted by the single-phase alternator is negative, the control circuit turns on the first gate when the comparison value of the effective value or the average value of the lamp voltage as the lamp terminal is less than the target voltage. fluid. When the output voltage is positive, the control circuit turns on the third thyristor when the comparison value is less than the threshold voltage of the target voltage, and turns on the second thyristor when the battery voltage of the battery is less than the predetermined voltage.

Thereby, the positive side component of the output voltage of the single-phase alternator can be supplied to the battery to charge the battery. The negative side component of the output voltage of the single-phase alternator is supplied to the luminaire. Further, when the effective value or the average value of the lamp voltage is less than the threshold voltage, at least a part of the positive side component of the output voltage of the single-phase alternator is supplied to the lamp.

Therefore, for example, when the load of the lamp is changed to lower the lamp voltage, the lamp voltage can be made closer to the target voltage more quickly.

That is, according to the battery charging device of one aspect of the present invention, the battery can be charged by the single-phase alternator while suppressing the decrease in the brightness of the lamp.

In addition, the examples are purely illustrative, and the scope of the invention is not limited thereto.

Further, as described above, in the embodiment, the anode of the thyristor is the first node, and the cathode of the thyristor is the second node, and the negative polarity of the output voltage of the single-phase alternator is the first polarity. The positive polarity of the output voltage of the single-phase alternator is the second polarity.

That is, in the embodiment, the power supply to the lamp is performed with the negative side component of the output voltage, and the battery is charged with the positive side component of the output voltage while supplying power to the lamp.

However, the anode of the thyristor can be the second node, and the cathode of the thyristor is the first node, and the negative polarity of the output voltage of the single-phase alternator is the second polarity, and the output of the single-phase alternator is used. The positive polarity of the voltage is the first polarity.

In other words, the positive side component of the output voltage can supply power to the lamp, and the battery can be charged by the negative side component of the output voltage, and the auxiliary power supply can be supplied to the lamp.

Further, in the embodiment, although the selection of the thyristor as the switching element has been described, the MOS transistor may be selected as the switching element.

100‧‧‧Battery charging device

A‧‧‧ single phase alternator

AC‧‧‧ calculus circuit

B‧‧‧Battery

BC‧‧‧Battery voltage adjustment circuit

C1‧‧‧1st comparison circuit

C2‧‧‧2nd comparison circuit

CON‧‧‧Control circuit

DVG‧‧‧Differential voltage generation circuit

L‧‧‧Lamps

R‧‧‧ load

S1‧‧‧1st brake fluid

S2‧‧‧2nd thyristor

S3‧‧‧3rd thyristor

TA‧‧‧ Generator Terminal

TB‧‧‧ battery terminal

TE‧‧‧ grounding terminal

TL‧‧‧Lighting terminal

TVG‧‧‧critical voltage generation circuit

Claims (7)

A battery charging device capable of controlling charging of a battery and power supply of a lamp by a single-phase alternator, characterized in that: a generator terminal is included, and a coil of the single-phase alternator is connected between the ground and the ground; The lamp terminal has a lamp connected to the ground; the battery terminal has a battery connected to the ground; the first switch element has a first node connected to the lamp terminal, and a second node is connected to the lamp a second terminal, wherein the first node is connected to the generator terminal, the second node is connected to the battery terminal, and the third node is connected to the generator terminal, and the second node is connected to the a lamp terminal; and a control circuit for controlling the operation of the first to third switching elements toward the gate output signals of the first to third switching elements; and output of the generator terminal outputted from the single-phase alternator When the voltage is the first polarity, when the comparison value of the effective value or the average value of the lamp voltage as the lamp terminal is less than the target voltage, When the output voltage is the second polarity, the control circuit turns on the third switching element when the comparison value is less than a threshold voltage lower than the target voltage. battery When the battery voltage is less than the predetermined voltage, the second switching element is turned on. The battery charging device according to claim 1, wherein the first switching element is a first thyristor, the second switching element is a second thyristor, and the third switching element is a third thyristor. The battery charging device according to claim 2, wherein the first polarity of the output voltage is a negative polarity of the output voltage, and the second polarity of the output voltage is a positive polarity of the output voltage, the first to the first The first node-based anode of the thyristor, and the second node-based cathode of the first to third thyristors, wherein the control circuit turns off the second gate when the output voltage is the first polarity In the fluid and the third sluice fluid, when the comparison value is less than the target voltage, the first sluice fluid is turned on, and when the comparison value is equal to or higher than the target voltage, the first sluice fluid is turned off. When the output voltage is the second polarity, the control circuit turns off the first thyristor, and when the comparison value is less than the threshold voltage, the third thyristor is turned on, and the comparison value is the threshold voltage. In the above case, the third thyristor is turned off, and when the battery voltage of the battery is less than the predetermined voltage, the second thyristor is turned on, and the battery voltage of the battery is turned on. Ago When the predetermined voltage is equal to or higher than the predetermined voltage, the second thyristor is turned off. The battery charging device of claim 2, wherein the size of the third thyristor is smaller than the size of the first sluice fluid. The battery charging device of claim 1 or 2, wherein the control circuit comprises: a calculation circuit capable of detecting a lamp voltage of the lamp terminal, calculating and outputting the measured lamp voltage as an effective value or an average value. The comparison value; the threshold voltage generating circuit generates and outputs the threshold voltage; the differential voltage generating circuit generates a differential voltage, and outputs the target voltage obtained by adding the differential voltage to the threshold voltage; the first comparison circuit can Corresponding to a comparison result between the comparison value outputted by the calculation circuit and the target voltage output by the differential voltage generation circuit, and a polarity of the output voltage, outputting a signal to a gate of the first switching element; and a second comparison The circuit outputs a signal to the gate of the third switching element in response to a comparison between the comparison value outputted by the calculation circuit and the threshold voltage output by the threshold voltage generation circuit and the polarity of the output voltage. The battery charging device of claim 5, wherein when the output voltage is the first polarity, the first comparison circuit outputs a signal to a gate of the first switching element when the comparison value is less than the target voltage To turn on the first switching element, and the comparison value is the target voltage. In the above case, the signal is output to the gate of the first switching element to turn off the first switching element, and the second comparison circuit outputs a signal to the gate of the third switching element to turn off the third switch. In the case where the output voltage is the second polarity, the first comparison circuit outputs a signal to the gate of the first switching element to turn off the first switching element, and the second comparison circuit does not have the comparison value. When the threshold voltage is exceeded, a signal is outputted to the gate of the third switching element to turn on the third switching element. On the other hand, when the comparison value is equal to or higher than the threshold voltage, the gate of the third switching element is turned on. The signal is output to disconnect the third switching element. A battery charging method is performed by a battery charging device, which can control charging of a battery and power supply of a lamp by a single-phase alternator, and includes: a generator terminal connected between the ground and the ground a coil of the single-phase alternator; a lamp terminal connected to the grounding device; and a battery terminal connected to the ground; and a first switch component, the first node is connected to the lamp a second node connected to the generator terminal; a second node connected to the generator terminal, a second node connected to the battery terminal; and a third node connected to the first node Generator terminal, and The second node is connected to the lamp terminal; and the battery charging method is characterized in that the output voltage of the generator terminal output from the single-phase alternator is the first polarity, and is effective as a lamp voltage of the lamp terminal When the comparison value of the value or the average value is less than the target voltage, the first switching element is turned on. On the other hand, when the output voltage is the second polarity, the comparison value is turned on when the comparison value is less than the threshold voltage lower than the target voltage. The third switching element turns on the second switching element when the battery voltage of the battery is less than a predetermined voltage.