JP2012056434A - Power supply device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device for a vehicle capable of hardly using electric loads unnecessary for a user, suppressing consumption of the battery, improving fuel consumption, and extending travel distance.SOLUTION: The power supply device for a vehicle including a battery 3 and being configured to supply electric power to onboard load groups G1 to G4 by the battery 3, includes: a receiving means (9) for receiving a vehicle speed value from a vehicle speed detector 6 which detects the speed of the vehicle; a determining means (9) for determining whether the vehicle speed value V received by the receiving means (9) is not less than a predetermined vehicle speed value V1; and a stopping means 12 for stopping electric power supply to the load group G3 including one or a plurality of predetermined onboard loads among the onboard load groups G1 to G4 when the determining means (9) is not less than V1.

Description

  The present invention relates to a power supply device for a vehicle that is used in an engine-driven vehicle, a hybrid vehicle, and an electric vehicle, includes a battery, and is configured to supply power to a vehicle-mounted load group using the battery.

  In recent years, the types of electric loads mounted on vehicles and their power consumption tend to increase dramatically. In addition, there is a tendency that the driving of the load is controlled by an electric signal without depending on the mechanical connection, and the power consumption is increasing more and more.

  Patent Document 1 discloses that in-vehicle electrical equipment that does not require operation when the vehicle is stopped or below the set vehicle speed, the power supply is stopped when the vehicle speed is below the set value, and the vehicle speed exceeds the set value. There is disclosed a vehicle power supply device configured to supply electric power so as to save battery consumption during stopping or running at a low speed.

JP-A-7-257296

As described above, the types of electric loads mounted on vehicles and their power consumption are increasing, but some of these electric loads are only under certain conditions such as security functions and driving assistance functions ( There are things that only need to work) (only during parking, only during high-speed driving, etc.). These consume power even if they are not in operation, and there is a problem that the fuel consumption is deteriorated and the travelable distance is shortened (in the case of an electric vehicle).
For such a problem, Patent Document 1 discloses a vehicle power supply device, which is mainly for the purpose of preventing the battery from running out at low speeds and when stopped. The power supply to the load which is not considered and is not necessary during traveling is continued.

  The present invention has been made in view of the circumstances as described above, and it is difficult to use an electric load that is not necessary for a user, suppresses battery consumption, improves fuel consumption, and extends a travelable distance (of an electric vehicle). The present invention has an object to provide a vehicle power supply device capable of achieving the above.

  A vehicle power supply device according to a first aspect of the present invention is a vehicle power supply device that includes a battery and is configured to supply power to an in-vehicle load group with the battery, and receives a vehicle speed value from a vehicle speed detector that detects the vehicle speed. Receiving means, determining means for determining whether the vehicle speed value V received by the receiving means is equal to or higher than a predetermined vehicle speed value V1, and when determining that the determining means is equal to or higher than V1, And stopping means for stopping power supply to a load group including one or a plurality of predetermined on-vehicle loads.

  This vehicle power supply device is configured to supply power to a vehicle-mounted load group with a battery. The receiving means receives a vehicle speed value from a vehicle speed detector that detects the speed of the vehicle, and the determining means determines whether or not the vehicle speed value V received by the receiving means is equal to or greater than a predetermined vehicle speed value V1. When it is determined that the determination unit is equal to or higher than V1, the stop unit stops power supply to the load group including one or more predetermined vehicle load in the vehicle load group.

  According to a second aspect of the present invention, there is provided a vehicular power supply apparatus comprising: a second determination unit that determines whether the vehicle speed value V received by the reception unit is equal to or less than a second vehicle speed value V2 (> V1); And a second stopping means for stopping power supply to the second load group including one or a plurality of predetermined on-vehicle loads excluding the load group when the means is determined to be V2 or less. .

  In this vehicle power supply device, the second determination means determines whether or not the vehicle speed value V received by the reception means is equal to or less than the second vehicle speed value V2 (> V1), and the second determination means is equal to or less than V2. When it determines with there being, a 2nd stop means stops the electric power feeding to the 2nd load group containing the 1 or several predetermined vehicle-mounted load except the said load group.

  According to a third aspect of the present invention, there is provided a vehicular power supply apparatus comprising: third determination means for determining whether or not the vehicle speed value V received by the reception means is greater than or equal to a third vehicle speed value V3 (> V2); And third stop means for stopping power supply to a third load group including one or a plurality of predetermined on-vehicle loads excluding the load group and the second load group when the means is determined to be V3 or more. It is characterized by that.

  In this vehicle power supply device, the third determining means determines whether or not the vehicle speed value V received by the receiving means is equal to or higher than the third vehicle speed value V3 (> V2), and the third determining means is equal to or higher than V3. When it determines with there being, a 3rd stop means stops the electric power feeding to the 3rd load group containing the 1 or several predetermined vehicle-mounted load except the said load group and the 2nd load group.

  According to a fourth aspect of the present invention, there is provided a vehicular power supply device, wherein the vehicle speed value V received by the receiving means is a fourth determining means for determining whether the vehicle speed value V is 0 or more and less than V1, and the fourth determining means is 0 or more and less than V1. And a fourth stop means for stopping power supply to one or a plurality of in-vehicle loads excluding the load group, the second load group, and the third load group.

  In this vehicle power supply device, the fourth determination means determines whether or not the vehicle speed value V received by the reception means is 0 or more and less than V1, and the fourth determination means determines that it is 0 or more and less than V1. Sometimes, the fourth stop means stops power feeding to one or a plurality of on-vehicle loads excluding the load group, the second load group, and the third load group.

  According to the vehicle power supply device of the present invention, it is difficult to use an electric load that is not necessary for the user, and it is possible to suppress battery consumption, improve fuel consumption, and extend a travelable distance (in the case of an electric vehicle). A vehicle power supply device can be realized.

It is a block diagram which shows schematic structure of embodiment of the vehicle power supply device which concerns on this invention. It is a flowchart which shows operation | movement of the power supply device for vehicles shown in FIG. It is a timing chart which shows operation | movement of the vehicle power supply device shown in FIG.

Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a vehicle power supply device according to the present invention.
In this vehicle power supply device, an alternator (on-vehicle generator, AC generator) 2 generates power in conjunction with the engine 1. The generated electric power is converted into direct current in the alternator 2 and given to the battery (lead storage battery) 3. Further, the electric power generated by the alternator 2 and the electric power output by the battery 3 are given to the in-vehicle load group mounted on the vehicle via the power supply control device 8.
The in-vehicle load group is grouped into a first load group G1, a second load group G2, a third load group G3, and a fourth load group G4 each including one or a plurality of in-vehicle loads.

The power supply control device 8 includes a control unit 9 to which each ON signal of the ignition switch 4 and the accessory switch 5 is given, the battery 3, the first load group G1, the second load group G2, the third load group G3, and the fourth load group. There are provided shut-off circuits 10, 11, 12, 13 for connecting / shut-off with G4, respectively.
The controller 9 is provided with a vehicle speed signal from the vehicle speed detector 6 that detects the vehicle speed and a shift position signal from the shift position detector 7 that detects the position of the shift lever.

Respective fuses are connected between the breaking circuits 10 to 13 and the loads of the first load group G1 to the fourth load group G4.
The control unit 9 controls the cutoff / connection of the cutoff circuits 10 to 13 based on the given vehicle speed signal, shift position signal, and each ON signal of the ignition switch 4 and the accessory switch 5.

  The first load group (third load group) G1 is conventionally supplied with power from the battery 3 regardless of whether the accessory switch 5 and the ignition switch 4 are on / off. In the present embodiment, for example, It is an in-vehicle load group in which power feeding is stopped at a vehicle speed of 50 km / h or higher. The first load group G1 includes, for example, a smart entry ECU, an immobilizer, a self power siren, a glass break sensor, a power back door, a power slide door, a memory seat control, and a parking assist.

  The second load group G2 is conventionally supplied with power from the battery 3 when the ignition switch 4 is on. In the present embodiment, the second load group G2 is supplied with power except when the shift position is R (rear, back, reverse). It is a vehicle-mounted load group made into a stop state. The second load group G2 includes, for example, a room mirror that is an EC mirror having a function of displaying an image of the back camera when the shift position becomes R.

The third load group (load group) G3 is conventionally supplied with power from the battery 3 when the ignition switch 4 is on. In the present embodiment, for example, the power supply is stopped at a vehicle speed of 5 km / h or higher. This is a vehicle load group. The third load group G3 includes, for example, shift lock.
The fourth load group (second load group) G4 is conventionally supplied with power from the battery 3 when the ignition switch 4 is on. In the present embodiment, for example, power is supplied at a vehicle speed of 20 km / h or less. It is a vehicle-mounted load group made into a stop state. The fourth load group G3 includes, for example, cruise control.

The operation of the vehicular power supply apparatus according to the present invention having such a configuration will be described below with reference to the flowchart shown in FIG.
First, the control unit 9 of the power supply control device 8 turns on (connects) the shut-off circuit 10 as an initial state, puts the first load group G1 into a power feeding state, and turns off the shut-off circuits 11, 12, and 13. (Blocked), the second to fourth load groups G2, G3, G4 are brought into a power supply stop state (S1).
Next, the control unit 9 determines whether or not the ON signal is received from the ignition switch 4 (S2). If the ON signal is not received, the cutoff circuit 10 is ON and the first load group G1 power supply state is determined. The initial states of the cutoff circuits 11, 12, 13 off, and the second to fourth load groups G2, G3, G4 are stopped (S1).

If the control unit 9 receives the ON signal from the ignition switch 4 (S2), the control unit 9 turns on the shut-off circuits 10 and 12 (connects them) and sets the first and third load groups G1 and G3 to the power supply state. Then, the shut-off circuits 11 and 13 are turned off (shut off), and the second and fourth load groups G2 and G4 are brought into a power feeding stop state (S3).
Next, the control unit 9 reads a shift position signal from the shift position detector 7 (S4), and determines whether or not the shift position is R (back, reverse) (S5).

If the shift position is R (S5), the controller 9 turns on the shut-off circuits 10 to 12, puts the first, second, and third load groups G1, G2, and G3 into a power supply state, and turns off the shut-off circuit 13. Then, the fourth load group G4 is set in a power supply stop state (S7). Next, the control unit 9 reads a shift position signal from the shift position detector 7 (S4).
If the shift position is not R (S5), the controller 9 turns off the cutoff circuit 11 and puts the second load group G2 in a power supply stop state (S9). Next, the control unit 9 reads the vehicle speed value V from the vehicle speed detector 6 (S11), and determines whether or not the read vehicle speed value V is 0 ≦ V <V1 (for example, 5 km / h) (S13). ).

If the read vehicle speed value V is 0 ≦ V <V1 (S13), the control unit 9 turns on the shut-off circuits 10 and 12, sets the first and third load groups G1 and G3 to the power supply state, and shuts off. The circuit 13 is turned off and the fourth load group G4 is brought into a power supply stop state (S15).
Next, the control unit 9 determines whether or not the ON signal is received from the ignition switch 4 (S2).

If the read vehicle speed value V is not 0 ≦ V <V1 (S13), the control unit 9 determines whether the read vehicle speed value V is V1 ≦ V ≦ V2 (for example, 20 km / h). Determine (S17).
If the read vehicle speed value V1 is V1 ≦ V ≦ V2 (S17), the control unit 9 turns on the cutoff circuit 10, sets the first load group G1 in the power supply state, and turns off the cutoff circuits 12, 13 Thus, the third and fourth load groups G3 and G4 are set to the power supply stop state (S19). Next, the control unit 9 reads the vehicle speed value V from the vehicle speed detector 6 (S11).

If the read vehicle speed value V is not V1 ≦ V ≦ V2 (S17), the control unit 9 determines whether the read vehicle speed value V is V2 <V <V3 (for example, 50 km / h). Determine (S21).
If the read vehicle speed value V is V2 <V <V3 (S21), the control unit 9 turns on the shut-off circuits 10 and 13 to place the first and fourth load groups G1 and G4 in the power supply state and shuts off. The circuit 12 is turned off, and the third load group G3 is brought into a power supply stop state (S23). Next, the control unit 9 reads the vehicle speed value V from the vehicle speed detector 6 (S11).

  If the read vehicle speed value V is not V2 <V <V3 (S21), that is, if V3 ≦ V, the control unit 9 turns on the shut-off circuit 13 to supply power to the fourth load group G4. Then, the cutoff circuits 10 and 12 are turned off, and the first and third load groups G1 and G3 are set in a power supply stop state (S25). Next, the control unit 9 reads the vehicle speed value V from the vehicle speed detector 6 (S11).

With the above operation, for example, as shown in FIG. 3A, when the vehicle speed is gradually accelerated from 0 km / h to over 50 km / h and travels for a while and then gradually decelerated to 0 km / h, The power supply states of the four load groups G1 to G4 are as shown in the timing charts of FIGS.
That is, as shown in FIG. 3B, the first load group G1 is supplied with power from the battery 3 regardless of whether the accessory switch 5 and the ignition switch 4 are on or off, but is in a power supply stopped state at a vehicle speed of 50 km / h or higher. Is done.
The smart entry ECU, immobilizer, self-power siren, glass break sensor, power back door, power slide door, memory seat control, and parking assist of the first load group G1 are not necessary at high speeds.

As shown in FIG. 3C, the second load group G2 is supplied with power only when the shift position is R (rear, back, reverse).
When the shift position of the second load group G2 is R, the room mirror (EC mirror) on which the image of the back camera is displayed does not require power supply when the shift position is other than R.

As shown in FIG. 3D, the third load group G3 is supplied with power from the battery 3 when the ignition switch 4 is on, but is in a power supply stop state at a vehicle speed of 5 km / h or higher.
A shift lock that cannot be switched from “parking” to another shift position is not necessary when the vehicle is running unless the third load group G3 is in a stop state where the brake pedal is depressed.

As shown in FIG. 3E, the fourth load group G4 can be supplied with power from the battery 3 when the ignition switch 4 is on, but is in a power supply stop state at a vehicle speed of 20 km / h or less. The cruise control of the fourth load group G3 that maintains the set speed without depressing the accelerator pedal is not necessary during low-speed driving.
In the present embodiment, an engine-driven vehicle is described, but it goes without saying that the present invention is also applicable to a hybrid vehicle and an electric vehicle equipped with a battery.

DESCRIPTION OF SYMBOLS 1 Engine 2 Alternator 3 Battery 4 Ignition switch 6 Vehicle speed detector 7 Shift position detector 8 Power supply control device 9 Control part (reception means, determination means, 2nd-4th determination means)
10. Shut-off circuit (third stop means)
11 Shutdown circuit (fourth stop means)
12 Shutdown circuit (stopping means)
13 Shut-off circuit (second stop means)
G1 first load group (third load group)
G2 2nd load group G3 3rd load group (load group)
G4 4th load group (2nd load group)

Claims (4)

In a vehicle power supply device comprising a battery and configured to supply power to an in-vehicle load group by the battery,
Reception means for receiving a vehicle speed value from a vehicle speed detector for detecting the speed of the vehicle, determination means for determining whether the vehicle speed value V received by the reception means is equal to or higher than a predetermined vehicle speed value V1, and the determination means for V1 When it determines with it being the above, The vehicle power supply device provided with the stop means to stop the electric power feeding to the load group containing the 1 or several predetermined vehicle-mounted load in the said vehicle-mounted load group.   When the vehicle speed value V received by the receiving means is determined to be whether or not the second vehicle speed value V2 (> V1) or less, and when the second determination means determines that it is V2 or less The vehicle power supply device according to claim 1, further comprising: second stop means for stopping power supply to a second load group including one or a plurality of predetermined on-vehicle loads excluding the load group.   When the vehicle speed value V received by the receiving means is determined to be greater than or equal to a third vehicle speed value V3 (> V2), and when the third determination means determines that the vehicle speed value V is greater than or equal to V3 The vehicle power supply device according to claim 2, further comprising third stop means for stopping power supply to a third load group including one or a plurality of predetermined on-vehicle loads excluding the load group and the second load group.   When the vehicle speed value V received by the receiving means is determined to be whether or not the vehicle speed value V is 0 or more and less than V1, and the fourth determination means determines that the vehicle speed value V is 0 or more and less than V1, the load group The vehicle power supply device according to claim 3, further comprising: a fourth stopping unit that stops power feeding to one or a plurality of on-vehicle loads excluding the second load group and the third load group.

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