JPWO2020026405A1 - Vehicle power supply device and control method of vehicle power supply device - Google Patents

Abstract

The vehicle power supply device is controlled to be turned on / off by the user, and by turning it on, the third switch is turned on and the first and second switches can be turned on, while by turning it off, the third switch is turned on. The main switch that turns off the switch 3 and makes the first and second switches unable to turn on, one end is connected to the driver terminal, the other end is connected to the ground terminal, and the AC power supplied from the motor is rectified. It includes a driver that controls and outputs to the driver terminal or drives the motor by the voltage supplied to the driver terminal, and a control circuit that controls the operation of the driver, the first switch, and the second switch.

Description

The present invention relates to a vehicle power supply device and a method for controlling a vehicle power supply device.

Conventionally, as a vehicle power supply device in which power obtained from a motor is not supplied to a part of a load when an engine is started, a vehicle equipped with a battery and a kick start device is known (for example, Patent No. 3866499). See issue).

In this conventional technique (FIGS. 8 and 9), the first relay Relay1 that controls the electric power supplied to the load of the fuel pump or the like is already turned on when self-starting when the battery is normal. Therefore, the battery battery must be energized after waiting for the second relay Relay2, which switches the current path during regeneration and self-start, to turn on (switch to the current path during self-start). The motor starting current will flow through the fuse Fuse 1 and the first relay Relay 1. As a result, the fuse Fuse1 through which the motor starting current flows is easily blown.

Therefore, in the above-mentioned prior art, a sufficient waiting time is provided at the time of starting the engine before the motor energization is controlled by the ECU (Engine Control Unit).

That is, in the above-mentioned prior art, there is a problem that it is not possible to improve the startability of the vehicle engine by the motor while reducing the necessity of considering the blown fuse.

Therefore, an object of the present invention is to provide a vehicle power supply device capable of improving the startability of a vehicle engine by a motor while reducing the need for consideration of blown fuses.

The vehicle power supply device according to the embodiment according to one aspect of the present invention is
A vehicle power supply device that uses a motor to start the engine of a vehicle equipped with a battery.
The battery terminal to which the positive electrode of the battery is connected and
A ground terminal to which the negative electrode of the battery is connected and grounded,
The first load terminal to which the first load is connected and
With the second load terminal to which the second load is connected,
A first fuse, one end of which is connected to the battery terminal,
A driver terminal electrically connected to the second load terminal and
A first switch with one end connected to the other end of the first fuse and the other end connected to the driver terminal.
A second switch, one end of which is connected to the battery terminal and the other end of which is connected to the driver terminal.
A third switch, one end of which is connected to the other end of the first fuse and the other end of which is connected to the first load terminal.
The on / off is controlled by the user, and by turning it on, the third switch is turned on and the first switch and the second switch can be turned on, while by turning it off, the third switch is turned on. A main switch that turns off the switch and makes the first switch and the second switch unable to turn on.
One end is connected to the driver terminal and the other end is connected to the ground terminal, and the AC power supplied from the motor is rectified and controlled to be output to the driver terminal, or by the voltage supplied to the driver terminal. A driver that drives the motor and
It is characterized by including the driver, a control circuit for controlling the operation of the first switch and the second switch.

In the vehicle power supply device
A second fuse connected between the driver terminal and the second load terminal,
A third fuse connected between the other end of the third switch and the first load terminal is further provided.

In the vehicle power supply device
The control circuit
After the main switch is turned on, if it is determined that the battery is normal at the time of self-starting by the motor of the engine, the first switch is turned off and the second switch is turned on. Moreover, it is characterized in that the third switch is turned on.

In the vehicle power supply device
The control circuit
If it is determined that the battery is normal at the time of kickstart of the engine by the user after the main switch is turned on, the first switch is turned on, the second switch is turned off, and the battery is determined to be normal. , The third switch is turned on.

In the vehicle power supply device
The control circuit
If it is determined that the battery is dead during self-starting by the motor of the engine after the main switch is turned on, the first switch is turned off and the second switch is turned on. It is characterized in that it is turned off and the third switch is turned on.

In the vehicle power supply device
The control circuit
If it is determined that the battery is dead at the time of kickstart of the engine by the user after the main switch is turned on, the first switch is turned off and the second switch is turned off. Moreover, it is characterized in that the third switch is turned on.

In the vehicle power supply device
The control circuit
After the engine E is started, the first switch is turned on, the second switch is turned off, and the third switch is turned on.

In the vehicle power supply device
The control circuit
When the rotation speed of the motor is equal to or higher than the preset reference rotation speed, it is determined that the engine has started, and it is determined that the engine has started.
On the other hand, when the rotation speed of the motor is less than the reference rotation speed, it is determined that the engine has not started.

In the vehicle power supply device
The control circuit
When the battery voltage of the battery terminal to which the battery is connected is equal to or higher than a preset threshold voltage, it is determined that the battery is normal.
On the other hand, when the battery voltage is less than the threshold voltage, it is determined that the battery is dead.

In the vehicle power supply device
A voltage detection circuit for detecting the battery voltage of the battery terminal is further provided.
The control circuit
It is characterized in that the state of the battery is determined based on the battery voltage detected by the voltage detection circuit.
In the vehicle power supply device
When the engine is started, the control circuit turns on the first switch and uses the regenerative voltage output from the motor as the driver, the driver terminal, the first switch, and the first switch. The battery is supplied to the battery through the fuse and the battery terminal.

In the vehicle power supply device
A capacitor that is charged by the battery voltage or the regenerative voltage when the main switch is turned on,
A power supply circuit for supplying a power supply voltage having a predetermined value of the charging voltage charged in the capacitor to the control circuit is further provided.
The control circuit
It is characterized in that the power supply voltage is supplied to start the operation.

In the vehicle power supply device
The first switch has a first coil whose one end is connected to one end of the main switch, and is turned on when the first coil is energized, while the first coil is not energized. It is the first relay that turns off to
The second switch has a second coil whose one end is connected to one end of the main switch, and is turned on when the second coil is energized, while the second coil is not energized. It is the second relay that turns off to
The third switch has a third coil in which one end is connected to one end of the main switch and the other end is connected to the ground terminal, and turns on when the third coil is energized, while the third switch is said. It is a third relay that turns off when the third coil is not energized.
The vehicle power supply device is
A fourth fuse, one end of which is connected to the battery terminal,
A first diode whose anode is connected to the other end of the fourth fuse and whose cathode is connected to the other end of the main switch.
A second diode whose anode is connected to the driver terminal and whose cathode is connected to the other end of the main switch.
One end is connected to the other end of the first coil and the other end is connected to the ground terminal, and on / off is controlled by the control circuit to control the first switch. With a transistor
One end is connected to the other end of the second coil and the other end is connected to the ground terminal, and on / off is controlled by the control circuit to control the second switch. With a transistor,
The control circuit
By turning on the first transistor after the main switch is turned on, the first coil is energized to turn on the first relay, while turning off the first transistor. , The first relay is turned off without energizing the first coil.
Further, after the main switch is turned on, by turning on the second transistor, the second coil is energized to turn on the second relay, while the second transistor is turned off. As a result, the second relay is turned off without energizing the second coil.

In the vehicle power supply device
A load control transistor connected in series with the second load is provided between the second load terminal and the ground terminal.
The control circuit is characterized in that the energization of the second load is controlled by controlling the load control transistor.

In the vehicle power supply device
The vehicle is a two-wheeled vehicle
The first load is the tail lamp of the two-wheeled vehicle or the stop lamp of the two-wheeled vehicle.
The second load is characterized by being a fuel pump of the engine, an injector of the engine, or an ignition coil of the engine.

A method for controlling a vehicle power supply device according to an embodiment of the present invention is as follows.
A vehicle power supply device for starting the engine of a vehicle equipped with a battery by a motor, the battery terminal to which the positive electrode of the battery is connected, the ground terminal to which the negative electrode of the battery is connected and grounded, and the first. The first load terminal to which the load is connected, the second load terminal to which the second load is connected, the first fuse having one end connected to the battery terminal, and the first fuse having one end connected to the battery terminal. A first switch connected to the other end of the fuse and the other end connected to the driver terminal, a second switch having one end connected to the battery terminal and the other end connected to the driver terminal, and one end thereof. A second fuse connected to the other end of the first switch, the other end connected to the second load terminal, and a third switch having one end connected to the other end of the first fuse. A third fuse, one end of which is connected to the other end of the third switch and the other end of which is connected to the first load terminal, and the third fuse, which is controlled on / off by the user and turned on, thereby turning on the third fuse. The first switch and the second switch can be turned on at the same time as turning on the switch, while the third switch is turned off and the first switch and the second switch are turned off by turning off the switch. A main switch that cannot be turned on, one end is connected to the driver terminal, the other end is connected to the ground terminal, and the AC power supplied from the motor is rectified and controlled to be output to the driver terminal, or Control of a vehicle power supply device including a driver that drives the motor by a voltage supplied to the driver terminal, and a control circuit that controls the operation of the driver, the first switch, and the second switch. It ’s a method,
When the control circuit determines that the battery is normal at the time of self-starting by the motor of the engine after the main switch is turned on, the control circuit turns off the first switch and turns off the second switch. It is characterized in that the switch is turned on and the third switch is turned on.

The vehicle power supply device according to one aspect of the present invention is a vehicle power supply device that starts the engine of a vehicle equipped with a battery by a motor, and has a battery terminal to which a positive electrode of the battery is connected and a negative electrode of the battery. A grounded terminal to be connected and grounded, a first load terminal to which the first load is connected, a second load terminal to which the second load is connected, and a first with one end connected to the battery terminal. The fuse, the driver terminal electrically connected to the second load terminal, the first switch with one end connected to the other end of the first fuse and the other end connected to the driver terminal, and one end A second switch connected to the battery terminal and the other end connected to the driver terminal, and a third switch one end connected to the other end of the first fuse and the other end connected to the first load terminal. The user controls on / off, and by turning it on, the third switch is turned on and the first switch and the second switch can be turned on, while by turning it off, the third switch is turned on. The main switch that turns off the first switch and the second switch so that they cannot be turned on, one end is connected to the driver terminal, the other end is connected to the ground terminal, and the AC power supplied from the motor is rectified and controlled. It is provided with a driver that outputs the fuse to the driver terminal or drives the motor by the voltage supplied to the driver terminal, and a control circuit that controls the operation of the driver, the first switch, and the second switch.

In this vehicle power supply device, after the main switch is turned on, when the engine motor self-starts, the first switch is turned off, so that there is no need to consider fuse blown, and the operating time of the second switch. It is possible to transition to the starting pattern of motor energization by the control circuit over time.

That is, according to the vehicle power supply device of the present invention, it is possible to improve the startability of the vehicle engine by the motor while reducing the necessity of considering the blown fuse.

FIG. 1 is a diagram showing an example of the configuration of the vehicle power supply device 100 according to the first embodiment. FIG. 2 is a diagram showing an example of an operation sequence of the vehicle power supply device 100 shown in FIG. FIG. 3 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows during self-start when the battery B is normal. FIG. 4 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows at the time of kick start when the battery B is normal. FIG. 5 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows during self-start when the battery B is dead. FIG. 6 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows at the time of kick start when the battery B is dead. FIG. 7 is a diagram showing an example of a current path of the vehicle power supply device 100 after the engine E is started. FIG. 8 is a diagram showing a configuration of a conventional vehicle power supply device. FIG. 9 is a diagram showing an operation sequence of the conventional vehicle power supply device shown in FIG.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

The vehicle power supply device 100 according to the first embodiment has, for example, as shown in FIG. 1, a battery terminal TB, a ground terminal TG, a first load terminal TL1, a second load terminal TL2, and a first. Fuse F1, 1st switch (relay) R1, 2nd switch (relay) R2, 2nd fuse F2, 3rd switch (relay) R3, 3rd fuse F3, and 1st Fuse F4 of 4, main switch MSW, driver (three-phase bridge circuit) DX, detection resistor RX, voltage detection circuit VD, capacitor C, power supply circuit S, first diode D1, second The diode D2, the first transistor (nMOS transistor) Tr1, the second transistor (nMOS transistor) Tr2, the load control transistors (nMOS transistors) Tr3, Tr4, Tr5, and the control circuit CON are provided.

For example, as shown in FIG. 1, a driver DX, a detection resistor RX, a voltage detection circuit VD, a capacitor C, a power supply circuit S, a first diode D1, a second diode D2, and a first transistor ( The nMOS transistor) Tr1, the second transistor (nMOS transistor) Tr2, the load control transistors Tr3, Tr4, Tr5, and the control circuit CON constitute an ECU.

In the vehicle power supply device 100, for example, the engine E of the vehicle equipped with the battery B is started by the motor M.

The vehicle is, for example, a two-wheeled vehicle. In this case, the first load Load1 is, for example, a light device such as a tail lamp of the two-wheeled vehicle or a stop lamp of the two-wheeled vehicle.

As shown in FIG. 1, for example, one end of the first load Load1 is connected to the first load terminal TL1 and the other end is connected to the ground terminal TG.

The second loads Load2a, Load2b, and Load2c are, for example, the fuel pump of the engine E, the injector of the engine E, or the ignition coil of the engine E loaded on the motorcycle.

As shown in FIG. 1, one end of the second load Load2a, Load2b, and Load2c is connected to the second load terminal TL2, and the other end is connected to the ground terminal TG via the load control transistors Tr3, Tr4, and Tr5. It is connected to the.

Further, as shown in FIG. 1, for example, the positive electrode of the battery B is connected to the battery terminal TB.

Further, as shown in FIG. 1, for example, the ground terminal TG is connected to the negative electrode of the battery B and is grounded.

Further, as shown in FIG. 1, for example, the first load terminal TL1 is connected to the first load Load1.

Further, as shown in FIG. 1, for example, the second load terminal TL2 is connected to the second load Load2.

Further, one end of the first fuse F1 is connected to the battery terminal TB, for example, as shown in FIG.

Further, as shown in FIG. 1, for example, one end of the first switch R1 is connected to the other end of the first fuse F1, and the other end is connected to the driver terminal TDX. The driver terminal TDX is electrically connected to the second load terminal TL2 via the second fuse F2.

The first switch R1 is, for example, as shown in FIG. 1, a first relay having a first coil RC1 having one end connected to one end of the main switch MSW.

The first switch R1 is turned on when the first coil RC1 is energized, while it is turned off when the first coil RC1 is not energized.

Further, one end of the second switch R2 is connected to the battery terminal TB, and the other end is connected to the driver terminal TDX.

The second switch R2 is, for example, as shown in FIG. 1, a second relay having a second coil RC2 having one end connected to one end of the main switch MSW.

The second switch R2 is turned on when the second coil RC2 is energized, while it is turned off when the second coil RC2 is not energized.

Further, as shown in FIG. 1, for example, one end of the second fuse F2 is connected to the other end of the first switch R1, and the other end is connected to the second load terminal TL2. The second fuse F2 may be omitted if necessary.

Further, as shown in FIG. 1, for example, one end of the third switch R3 is connected to the other end of the first fuse F1, and the other end is connected to the first load terminal via the third fuse F3. It is connected to TL1.

The third switch R3 is, for example, as shown in FIG. 1, a third relay having a third coil RC3 having one end connected to one end of the main switch MSW and the other end connected to the ground terminal TG. is there.

Then, for example, as shown in FIG. 1, the third switch R3 is turned on when the third coil RC3 is energized, while it is turned off when the third coil RC3 is not energized. There is.

Further, as shown in FIG. 1, for example, one end of the third fuse F3 is connected to the other end of the third switch R3, and the other end is connected to the first load terminal TL1. The third fuse F3 may be omitted if necessary.

Further, the main switch MSW is controlled to be turned on / off by the user.

When the main switch MSW is turned on, the third switch R3 is turned on and the first switch R1 and the second switch R2 can be turned on.

On the other hand, when the main switch MSW is turned off, the third switch R3 is turned off and the first switch R1 and the second switch R2 cannot be turned on.

Further, in the driver DX, one end (node on the power supply side of the high-side transistor) is connected to the driver terminal TDX, and the other end (node on the ground side of the low-side transistor) is connected to the ground terminal TG via the detection resistor RX. Has been done.

Then, this driver DX rectifies and controls the AC power supplied from the motor M, for example, when the motor M is generating (regenerating) when the engine E is driven or the user kick-starts the engine E. Then, it is output to the driver terminal TDX.

On the other hand, this driver DX drives the motor M by the voltage supplied to the driver terminal TDX at the time of self-starting to start the engine E with the voltage of the battery B, for example.

This driver DX is, for example, as shown in FIG. 1, a three-phase bridge circuit composed of three high-side transistors and three low-side transistors.

Further, the voltage detection circuit VD detects the battery voltage of the battery terminal TB via the fourth fuse F4, for example, as shown in FIG.

Further, for example, as shown in FIG. 1, one end of the capacitor C is connected to one end of the main switch MSW, and the other end is connected to the ground terminal TG.

When the main switch MSW is turned on, this capacitor C is charged by the battery voltage supplied via the battery terminal TB, the fourth fuse F4, the first diode D1, and the main switch MSW. There is.

Further, when the battery B is in a dead battery state, the capacitor C is charged by the regenerative voltage supplied via the second diode D2 and the main switch MSW when the main switch MSW is turned on. There is also.

Further, the power supply circuit S is connected between one end of the capacitor C and the control circuit CON, for example, as shown in FIG.

The power supply circuit S supplies the control circuit CON with a power supply voltage obtained by setting the charging voltage charged in the capacitor C to a predetermined value.

Further, as shown in FIG. 1, one end of the fourth fuse F4 is connected to the battery terminal TB, and the other end is the anode of the first diode D1 (for detecting the battery voltage of the voltage detection circuit VD). It is connected to the detection terminal TVD).

Further, in the first diode D1, for example, as shown in FIG. 1, the anode is connected to the other end of the fourth fuse F4, and the cathode is connected to the other end of the main switch MSW.

Further, in the second diode D2, for example, as shown in FIG. 1, the anode is connected to the driver terminal TDX, and the cathode is connected to the other end of the main switch MSW (the cathode of the first diode D1).

Further, as shown in FIG. 1, for example, one end (drain) of the first transistor Tr1 is connected to the other end of the first coil RC1 and the other end (source) is connected to the ground terminal TG.

The on / off of the first transistor Tr1 is controlled by the control circuit CON, and the on / off of the first switch R1 is controlled by controlling the energization of the first coil RC1.

The first transistor Tr1 is, for example, an nMOS transistor as shown in FIG.

Further, as shown in FIG. 1, for example, one end (drain) of the second transistor Tr2 is connected to the other end of the second coil RC2, and the other end (source) is connected to the ground terminal TG.

The on / off of the second transistor Tr2 is controlled by the control circuit CON, and the on / off of the second switch R2 is controlled by controlling the energization of the second coil RC2.

The second transistor Tr2 is, for example, an nMOS transistor as shown in FIG.

Further, the load control transistors Tr3, Tr4, and Tr5 are connected in series with the second loads Load2a, Load2b, and Load2c between the second load terminal TL2 and the ground terminal TG, for example, as shown in FIG. ing.

The load control transistors Tr3, Tr4, and Tr5 are turned on / off by the control circuit CON to control the energization of the second loads Load2a, Load2b, and Load2c.

The second transistor Tr2 is, for example, an nMOS transistor as shown in FIG.

Further, the control circuit CON is started by being supplied with a power supply voltage from the power supply circuit S.

The control circuit CON is, for example, a first transistor Tr1, a second transistor Tr2, a load control transistor Tr3, Tr4, Tr5, a driver DX, a first switch R1, a second switch R2, and a first load Load1. , The operation of the second load Load2a, Load2b, Load2c, the motor M, and the engine E is controlled.

Then, in the control circuit CON, after the main switch SW is turned on (that is, when the capacitor C is charged, the power supply voltage is supplied from the power supply circuit S to activate the control circuit CON, and the third switch R3 is activated. After turning on and supplying a current to the first load Load1), the on / off of the first transistor Tr1 is controlled.

For example, the control circuit CON is configured to energize the first coil RC1 and turn on the first relay R1 by turning on the first transistor Tr1 after the main switch SW is turned on. ..

On the other hand, the control circuit CON is adapted to turn off the first relay R1 without energizing the first coil RC1 by turning off the first transistor Tr1 after the main switch SW is turned on. ..

Further, in the control circuit CON, after the main switch SW is turned on (that is, when the capacitor C is charged, the power supply voltage is supplied from the power supply circuit S to activate the control circuit CON, and the third switch is activated. After R3 is turned on and a current is supplied to the first load Load1), the on / off of the second transistor Tr2 is controlled.

Further, for example, the control circuit CON turns on the second coil RC2 and turns on the second relay R2 by turning on the second transistor Tr2 after the main switch SW is turned on. ing.

On the other hand, the control circuit CON turns off the second relay R2 without energizing the second coil RC2 by turning off the second transistor Tr2 after the main switch SW is turned on.

Further, the control circuit CON controls the load control transistors Tr3, Tr4, and Tr5 to control the energization of the second loads Load2a, Load2b, and Load2c.

Here, this control circuit CON turns off the first switch R1 when it is determined that the battery B is normal at the time of self-starting by the motor M of the engine E after the main switch SW is turned on, for example. Then, the second switch R2 is turned on and the third switch R3 is turned on (FIG. 2).

Further, this control circuit CON turns on the first switch R1 and turns on the second switch R1 when the user determines that the battery B is normal at the kick start of the engine E after the main switch SW is turned on. Switch R2 is turned off and the third switch R3 is turned on (FIG. 2).

Further, for example, as shown in FIG. 1, when the control circuit CON determines that the battery B is in a dead state at the time of self-starting by the motor M of the engine E after the main switch SW is turned on. , The first switch R1 is turned off, the second switch R2 is turned off, and the third switch R3 is turned on (FIG. 2).

Further, the control circuit CON turns off the first switch R1 when, for example, after the main switch SW is turned on, when the user determines that the battery B is in a dead battery state at the kick start of the engine E. Then, the second switch R2 is turned off and the third switch R3 is turned on (FIG. 2).

Further, the control circuit CON is adapted to turn on the first switch R1, turn off the second switch R2, and turn on the third switch R3 after the engine E is started. (Fig. 2).

That is, when the engine E is started, the control circuit CON turns on the first switch R1 and uses the regenerative voltage output from the motor M as the driver DX, the driver terminal TDX, and the first switch R1. It is supplied to the battery B via the first fuse F1 and the battery terminal TB.

The control circuit CON determines whether or not the engine E has started based on the result of comparing the rotation speed of the motor M with the preset reference rotation speed.

For example, the control circuit CON determines that the engine E has started when the rotation speed of the motor M is equal to or higher than a preset reference rotation speed.

On the other hand, when the rotation speed of the motor M is less than the reference rotation speed, the control circuit CON determines that the engine E has not started.

Further, the control circuit CON determines the state of the battery B (for example, whether it is normal or the battery is dead) based on the battery voltage detected by the voltage detection circuit VD.

For example, the control circuit CON determines that the battery B is normal when the battery voltage of the battery terminal TB to which the battery B is connected is equal to or higher than a preset threshold voltage.

On the other hand, when the battery voltage of the battery terminal TB is less than the threshold voltage, the control circuit CON determines that the battery B is in a dead battery state.

Here, an example of a control method of a vehicle power supply device having the above configuration and functions will be described. Here, FIG. 3 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows during self-start when the battery B is normal. Further, FIG. 4 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows at the time of kick start when the battery B is normal. Further, FIG. 5 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows at the time of self-start when the battery B is dead. Further, FIG. 6 is a diagram showing an example of a current path of the vehicle power supply device 100 that flows at the time of kick start when the battery B is dead. Further, FIG. 7 is a diagram showing an example of a current path of the vehicle power supply device 100 after the engine E is started.

(Operation when battery B is normal, when self-starting)
As described above, when the control circuit CON determines that the battery B is normal at the time of self-starting by the motor M of the engine E after the main switch SW is turned on, the first switch R1 Is turned off, the second switch R2 is turned on, and the third switch R3 is turned on (FIGS. 2 and 3).

As a result, from the battery B, the first load Load1 is passed through the battery terminal TB, the first fuse F1, the on third switch R3, the third fuse F3, and the first load terminal TL1. A current is supplied to (Fig. 3).

As a result, the first load Load1 to which the current is supplied is driven (that is, the lamps such as the tail lamp of the two-wheeled vehicle and the stop lamp of the two-wheeled vehicle are turned on according to the user's operation).

Further, when the load control transistors Tr3, Tr4, and Tr5 are turned on, the battery B is passed through the battery terminal TB, the on second switch R2, the driver terminal TDX, and the second fuse F2. A current is supplied to the loads 2a, Load2b, and Load2c of 2. Further, a current is supplied from the battery B to the driver DX (motor M) via the battery terminal TB and the second switch R2 (FIG. 3).

As a result, the motor M is driven to rotate the engine E, and the second loads Load2a, Load2b, and Load2c are driven (the fuel pump of the engine E, the injector of the engine E, and the ignition coil of the engine E are driven). Then, the engine E will be started.

(Operation when battery B is normal, at kick start)
Further, this control circuit CON turns on the first switch R1 and turns on the second switch R1 when the user determines that the battery B is normal at the kick start of the engine E after the main switch SW is turned on. Switch R2 is turned off and the third switch R3 is turned on (FIGS. 2 and 4).

As a result, from the normal battery B and driver DX (motor M), the driver terminal TDX, the on first switch R1, the on third switch R3, the third fuse F3, and the first A current is supplied to the first load Load1 via the load terminal TL1 of the above (FIG. 4).

As a result, the first load Load1 to which the current is supplied is driven.

Further, when the load control transistors Tr3, Tr4, and Tr5 are turned on, a current is transmitted from the driver DX (motor M) to the second loads Load2a, Load2b, and Load2c via the driver terminal TDX and the second fuse F2. It is supplied (Fig. 4).

As a result, the second loads Load2a, Load2b, and Load2c are driven while the engine E is rotating (the fuel pump of the engine E, the injector of the engine E, and the ignition coil of the engine E are driven), so that the engine E is driven. It will start.

(Operation when the battery is dead, when self-starting)
Further, for example, as shown in FIG. 1, when the control circuit CON determines that the battery B is in a dead state at the time of self-starting by the motor M of the engine E after the main switch SW is turned on. , The first switch R1 is turned off, the second switch R2 is turned off, and the third switch R3 is turned on (FIGS. 2 and 5).

As a result, since the first and second switches R1 and R2 are turned off, no current is supplied from the driver DX (motor M) to the first load Load1 (FIG. 5).

From the battery B to the first load Load1 via the battery terminal TB, the first fuse F1, the on third switch R3, the third fuse F3, and the first load terminal TL1. , Current can be supplied (Fig. 5). However, if the battery voltage of the battery B is not high enough to drive the first load Load1, the lamp will not light.

Further, since the first and second switches R1 and R2 are off, no current is supplied from the battery B to the driver DX (motor M), and the engine does not start (FIG. 5).

(Operation when the battery is dead, at kick start)
Further, the control circuit CON turns off the first switch R1 when, for example, after the main switch SW is turned on, when the user determines that the battery B is in a dead battery state at the kick start of the engine E. Then, the second switch R2 is turned off and the third switch R3 is turned on (FIGS. 2 and 6).

As a result, since the first and second switches R1 and R2 are turned off, no current is supplied from the driver DX (motor M) to the first load Load1 (FIG. 6).

From the battery B to the first load Load1 via the battery terminal TB, the first fuse F1, the on third switch R3, the third fuse F3, and the first load terminal TL1. , Current can be supplied (Fig. 6). However, if the battery voltage of the battery B is not high enough to drive the first load Load1, the lamp will not light.

Further, when the load control transistors Tr3, Tr4, and Tr5 are turned on, a current is transmitted from the driver DX (motor M) to the second loads Load2a, Load2b, and Load2c via the driver terminal TDX and the second fuse F2. It is supplied (Fig. 4).

As a result, the second loads Load2a, Load2b, and Load2c are driven while the engine E is rotating (the fuel pump of the engine E, the injector of the engine E, and the ignition coil of the engine E are driven), so that the engine E is driven. It will start.

Since the first and second switches R1 and R2 are off, the current generated at the kick start is not supplied to the first load Load1, but only to the second loads Load2a, Load2b, and Load2c. It will be supplied (ie, used only for starting engine E).

(Operation after starting engine E)
Further, after the engine E is started, the control circuit CON turns on the first switch R1, turns off the second switch R2, and turns on the third switch R3 (FIGS. 2 and 2). 7).

As a result, since the first switch R1 is on and the second switch R2 is off, the regenerative current generated by driving the engine E is passed through the first to third fuses F1 to F3. Then, it is supplied to the battery B, the second load Load2a, Load2b, Load2c, and the first load Load1 (FIG. 7).

As described above, the vehicle power supply device 100 can improve the start delay due to the switching waiting time of the relay contacts.

That is, since the vehicle power supply device 100 does not turn on the first switch R1 until the motor M operates as a generator after the engine E is started, it is not necessary to consider the blowing of the first fuse, and the first The transition to the starting pattern is possible with the operating time of the switch R2 of 2 itself.

Further, the vehicle power supply device 100 can eliminate the need to control the power supply cut to the first load (lighting device) Load1.

That is, the vehicle power supply device 100 controls the power supply to the first load (lighter) Load1 by the third switch R3, but excites the first and second switches R1 and R2 as the main switch MSW. Is turned on, and the supply to the first load (lighting device) Vehicle 1 is on the battery B side.

As a result, even if there is no control of the ECU, when the engine E is kickstarted when the battery is dead, the power supply to the first load (lighting device) Load1 is cut, while the main switch MSW is turned on when the battery is normal. In accordance with this, power is supplied to the first load (lighting device) Load1.

In addition, it is not necessary to replace the fuse. If a fuse can be provided on the battery charging side, the overcurrent protection by the ECU is limited to the discharging side, and the internal circuit can be simplified.

As described above, according to the vehicle power supply device 100 according to the first embodiment, after the main switch SW is turned on, the first switch R1 is turned off at the time of self-start by the motor M of the engine E. It is not necessary to consider the blown fuse, and it is possible to shift to the starting pattern of the motor energization by the control circuit CON when the operating time of the second switch R2 elapses.

That is, according to the vehicle power supply device 100 according to the first embodiment, it is possible to improve the startability of the vehicle engine by the motor while reducing the necessity of considering the blown fuse.

In the above-described first embodiment, an example in which the first and second transistors Tr1 and Tr2 and the load control transistors Tr3, Tr4 and Tr5 are nMOSFETs (FIG. 1) has been described, but other semiconductor elements are applied. You may try to do it.

That is, these first and second transistors Tr1 and Tr2, and the load control transistors Tr3, Tr4, and Tr5 are replaced with, for example, a pMOSFET or other semiconductor element so that the same function can be performed. May be good.

The configuration of the other vehicle power supply device in the second embodiment is the same as that in the first embodiment.

As described above, the vehicle power supply device according to one aspect of the present invention is a vehicle power supply device in which the engine E of the vehicle equipped with the battery B is started by the motor M, and the positive electrode of the battery B is connected. Battery terminal TB, ground terminal TG to which the negative electrode of battery B is connected and grounded, first load terminal TL1 to which the first load Load1 is connected, and a second load terminal 2 to which the second load Load2 is connected. The load terminal TL2, the first fuse F1 having one end connected to the battery terminal TB, and the first switch having one end connected to the other end of the first fuse F1 and the other end connected to the driver terminal TDX. (Relay) R1, one end is connected to the battery terminal TB, the other end is connected to the driver terminal TDX, and one end is connected to the other end of the first switch R1. A second fuse F2 whose end is connected to the second load terminal TL2, a third switch (relay) R3 whose end is connected to the other end of the first fuse F1, and a third switch R3 at one end. The third fuse F3, which is connected to the other end of the fuse and the other end is connected to the first load terminal TL1, and the user controls on / off, and by turning on, the third switch R3 is turned on. The main switch that turns on the first and second switches R1 and R2, while turning it off turns off the third switch R3 and disables the first and second switches R1 and R2. The MSW and one end are connected to the driver terminal TDX and the other end is connected to the ground terminal TG, and the AC power supplied from the motor M is rectified and controlled to be output to the driver terminal TDX or supplied to the driver terminal TDX. It is provided with a driver (three-phase bridge circuit) DX that drives the motor M by the voltage to be used, and a control circuit CON that controls the operation of the driver DX, the first switch R1 and the second switch R2.

In this vehicle power supply device, after the main switch SW is turned on, when the motor M of the engine E self-starts, the first switch R1 is turned off, so that it is not necessary to consider the blown fuse, and the second When the operating time of the switch R2 elapses, it is possible to shift to the starting pattern of the motor energization by the control circuit CON.

That is, according to the vehicle power supply device of the present invention, it is possible to improve the startability of the vehicle engine by the motor while reducing the necessity of considering the blown fuse.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

100 Vehicle power supply device TB Battery terminal TG Ground terminal TL1 First load terminal TL2 Second load terminal F1 First fuse R1 First switch (relay)
R2 2nd switch (relay)
F2 2nd fuse R3 3rd switch (relay)
F3 3rd fuse F4 4th fuse MSW Main switch DX driver (three-phase bridge circuit)
RX detection resistor VD voltage detection circuit C capacitor S power supply circuit D1 first diode D2 second diode Tr1 first transistor (nMOS transistor)
Tr2 second transistor (nMOS transistor)
Tr3, Tr4, Tr5 Load control transistor CON control circuit B Battery E Engine M Motor

Claims (16)

A vehicle power supply device that uses a motor to start the engine of a vehicle equipped with a battery.
The battery terminal to which the positive electrode of the battery is connected and
A ground terminal to which the negative electrode of the battery is connected and grounded,
The first load terminal to which the first load is connected and
With the second load terminal to which the second load is connected,
A first fuse, one end of which is connected to the battery terminal,
A driver terminal electrically connected to the second load terminal and
A first switch with one end connected to the other end of the first fuse and the other end connected to the driver terminal.
A second switch, one end of which is connected to the battery terminal and the other end of which is connected to the driver terminal.
A third switch, one end of which is connected to the other end of the first fuse and the other end of which is connected to the first load terminal.
The on / off is controlled by the user, and by turning it on, the third switch is turned on and the first switch and the second switch can be turned on, while by turning it off, the third switch is turned on. A main switch that turns off the switch and makes the first switch and the second switch unable to turn on.
One end is connected to the driver terminal and the other end is connected to the ground terminal, and the AC power supplied from the motor is rectified and controlled to be output to the driver terminal, or by the voltage supplied to the driver terminal. A driver that drives the motor and
A vehicle power supply device comprising the driver, a control circuit for controlling the operation of the first switch and the second switch, and the like. A second fuse connected between the driver terminal and the second load terminal,
The vehicle power supply device according to claim 1, further comprising a third fuse connected between the other end of the third switch and the first load terminal. The control circuit
After the main switch is turned on, if it is determined that the battery is normal at the time of self-starting by the motor of the engine, the first switch is turned off and the second switch is turned on. The vehicle power supply device according to claim 1, wherein the third switch is turned on. The control circuit
If it is determined that the battery is normal at the time of kickstart of the engine by the user after the main switch is turned on, the first switch is turned on, the second switch is turned off, and the battery is determined to be normal. The vehicle power supply device according to claim 3, wherein the third switch is turned on. The control circuit
If it is determined that the battery is dead at the time of self-starting by the motor of the engine after the main switch is turned on, the first switch is turned off and the second switch is turned on. The vehicle power supply device according to claim 4, wherein the third switch is turned off and the third switch is turned on. The control circuit
If it is determined that the battery is dead at the time of kickstart of the engine by the user after the main switch is turned on, the first switch is turned off and the second switch is turned off. The vehicle power supply device according to claim 5, wherein the third switch is turned on. The control circuit
The sixth aspect of claim 6, wherein after the engine E is started, the first switch is turned on, the second switch is turned off, and the third switch is turned on. Vehicle power supply device. The control circuit
When the rotation speed of the motor is equal to or higher than the preset reference rotation speed, it is determined that the engine has started, and it is determined that the engine has started.
On the other hand, the vehicle power supply device according to claim 7, wherein when the rotation speed of the motor is less than the reference rotation speed, it is determined that the engine has not started. The control circuit
When the battery voltage of the battery terminal to which the battery is connected is equal to or higher than a preset threshold voltage, it is determined that the battery is normal.
On the other hand, the vehicle power supply device according to claim 8, wherein when the battery voltage is less than the threshold voltage, it is determined that the battery is in a dead battery state. A voltage detection circuit for detecting the battery voltage of the battery terminal is further provided.
The control circuit
The vehicle power supply device according to claim 9, wherein the state of the battery is determined based on the battery voltage detected by the voltage detection circuit. When the engine is started, the control circuit turns on the first switch and uses the regenerative voltage output from the motor as the driver, the driver terminal, the first switch, and the first switch. The vehicle power supply system according to claim 1, wherein the battery is supplied to the battery through the fuse and the battery terminal. A capacitor that is charged by the battery voltage or the regenerative voltage when the main switch is turned on,
A power supply circuit for supplying a power supply voltage having a predetermined value of the charging voltage charged in the capacitor to the control circuit is further provided.
The control circuit
The vehicle power supply device according to claim 11, wherein the power supply voltage is supplied to start the vehicle. The first switch has a first coil whose one end is connected to one end of the main switch, and is turned on when the first coil is energized, while the first coil is not energized. It is the first relay that turns off to
The second switch has a second coil whose one end is connected to one end of the main switch, and is turned on when the second coil is energized, while the second coil is not energized. It is the second relay that turns off to
The third switch has a third coil in which one end is connected to one end of the main switch and the other end is connected to the ground terminal, and turns on when the third coil is energized, while the third switch is said. It is a third relay that turns off when the third coil is not energized.
The vehicle power supply device is
A fourth fuse, one end of which is connected to the battery terminal,
A first diode whose anode is connected to the other end of the fourth fuse and whose cathode is connected to the other end of the main switch.
A second diode whose anode is connected to the driver terminal and whose cathode is connected to the other end of the main switch.
One end is connected to the other end of the first coil and the other end is connected to the ground terminal, and on / off is controlled by the control circuit to control the first switch. With a transistor
One end is connected to the other end of the second coil and the other end is connected to the ground terminal, and on / off is controlled by the control circuit to control the second switch. With a transistor,
The control circuit
By turning on the first transistor after the main switch is turned on, the first coil is energized to turn on the first relay, while turning off the first transistor. , The first relay is turned off without energizing the first coil.
Further, after the main switch is turned on, by turning on the second transistor, the second coil is energized to turn on the second relay, while the second transistor is turned off. The vehicle power supply device according to claim 12, wherein the second relay is turned off without energizing the second coil. A load control transistor connected in series with the second load is provided between the second load terminal and the ground terminal.
The vehicle power supply device according to claim 1, wherein the control circuit controls energization of the second load by controlling the load control transistor. The vehicle is a two-wheeled vehicle
The first load is the tail lamp of the two-wheeled vehicle or the stop lamp of the two-wheeled vehicle.
The vehicle power supply system according to claim 14, wherein the second load is a fuel pump of the engine, an injector of the engine, or an ignition coil of the engine. A vehicle power supply device for starting the engine of a vehicle equipped with a battery by a motor, the battery terminal to which the positive electrode of the battery is connected, the ground terminal to which the negative electrode of the battery is connected and grounded, and the first. The first load terminal to which the load is connected, the second load terminal to which the second load is connected, the first fuse having one end connected to the battery terminal, and the first fuse having one end connected to the battery terminal. A first switch connected to the other end of the fuse and the other end connected to the driver terminal, a second switch having one end connected to the battery terminal and the other end connected to the driver terminal, and one end thereof. A second fuse connected to the other end of the first switch, the other end connected to the second load terminal, and a third switch having one end connected to the other end of the first fuse. A third fuse, one end of which is connected to the other end of the third switch and the other end of which is connected to the first load terminal, and the third fuse, which is controlled on / off by the user and turned on, thereby turning on the third fuse. The first switch and the second switch can be turned on at the same time as turning on the switch, while the third switch is turned off and the first switch and the second switch are turned off by turning off the switch. A main switch that cannot be turned on, one end is connected to the driver terminal, the other end is connected to the ground terminal, and the AC power supplied from the motor is rectified and controlled to be output to the driver terminal, or Control of a vehicle power supply device including a driver that drives the motor by a voltage supplied to the driver terminal, and a control circuit that controls the operation of the driver, the first switch, and the second switch. It ’s a method,
When the control circuit determines that the battery is normal at the time of self-starting by the motor of the engine after the main switch is turned on, the control circuit turns off the first switch and turns off the second switch. A method for controlling a vehicle power supply device, which comprises turning on a switch and keeping the third switch on.

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