JP2011240881A - Power supply control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply control device for a vehicle, in which electric loads unnecessary for a user are hardly used and electric power is uselessly hardly consumed.SOLUTION: The power supply control device for the vehicle controls supply of power from a battery 6 to a plurality of loads 10-12 operable when an ignition key 9 is turned on. The power supply control device for the vehicle includes: an collecting means 2 for collecting operation history for each of the loads 10-12; a storing means 3 for storing the operation history for each of the loads collected by the collecting means 2; and a reference means 2 for referring to the operation history for each of the loads 10-12 stored in the storing means 3 when the ignition key 9 is turned on. When the ignition key 9 is turned on, the on/off of the supply of the power to the loads 10-12 is controlled on the basis of the operation history for each of the loads 10-12 referred to by the reference means 2.

Description

  The present invention relates to a vehicular power supply control device that controls power supply from a battery to a plurality of loads that can be operated when an ignition key is on.

  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 includes a plurality of in-vehicle information devices installed in a vehicle, and each in-vehicle information device has a predetermined-type bus line connection unit, and each in-vehicle information device connection unit. However, an in-vehicle information processing apparatus connected to each other via a bus line is disclosed. These connecting units configure the in-vehicle information processing apparatus so that the power is supplied only to a minimum necessary part in the sleep mode when the corresponding in-vehicle information device is not used.

JP-A-11-305878

As described above, the types of electric loads mounted on vehicles and their power consumption are increasing, but these electric loads can be individually applied if they are turned on when the user stops driving. In many cases, they are not turned off, but are turned off all at once by operating the ignition key. In addition, electrical loads that are turned off all at once by the operation of the ignition key are turned on all at once by the operation of the ignition key when the user starts operation. Is used as it is, and there is a problem that power is wasted.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vehicular power supply control device in which an electric load that is not necessary for a user is hardly used and electric power is hardly consumed wastefully.

  A vehicle power supply control device according to a first aspect of the present invention is the vehicle power supply control device that controls power supply from a battery to a plurality of loads that can be operated when an ignition key is on. The storage means for collecting the operation history for each load collected by the collection means, and the operation history for each load stored in the storage means when the ignition key is turned on. Referencing means, and when the ignition key is turned on, the power supply to the load is controlled to be on or off based on the operation history for each load referred to by the referring means. And

  In this vehicle power supply control device, the power supply from the battery to a plurality of loads that can be operated when the ignition key is on is controlled. The collection unit collects the operation history for each load, and the storage unit stores the operation history for each load collected by the collection unit. When the ignition key is turned on, the reference unit refers to the operation history for each load stored in the storage unit. When the ignition key is turned on, the power supply to the load is controlled to be turned on or off based on the operation history for each load referred to by the reference unit.

  In the vehicular power supply control device according to the second invention, the operation history is a ratio of a period during which the ignition key is on and a period during which the load is operated during the most recent predetermined period. .

  A vehicle power supply control device according to a third aspect of the present invention is a voltage detector for detecting an output voltage value of the battery, and means for determining whether or not the output voltage value detected by the voltage detector is lower than a predetermined voltage value. When the means determines that the voltage is lower than a predetermined voltage value, the power supply is turned off from a load having a short operating period of the operation history.

  In this vehicle power supply control device, the voltage detector detects and determines the output voltage value of the battery, and determines whether or not the output voltage value detected by the voltage detector is lower than a predetermined voltage value. When it is determined that the determination means is lower than the predetermined voltage value, the power supply is turned off from a load having a short operating period in the operation history.

  In the vehicle power supply control device according to the fourth aspect of the present invention, the load can be set to a variable operation level in stages, and the operation history of the load is an operation during a period during which the load has been operated during the most recent predetermined period. When the ignition key is turned on and the power supply to the load is turned on, the operation level is set based on the moving average.

  In this vehicle power supply control device, the load can be set to a variable operation level in stages, and the load operation history includes a moving average of the operation levels during the period in which the load is operated during the most recent predetermined period. When the ignition key is turned on and the power supply to the load is turned on, the operation level is set based on the moving average.

  According to the vehicle power supply control device according to the present invention, it is possible to realize a vehicle power supply control device in which an electric load which is not necessary for the user is hardly used and power is hardly consumed wastefully.

1 is a block diagram showing a schematic configuration of an embodiment of a vehicle power supply control device according to the present invention. It is a flowchart which shows the operation example of the power supply control apparatus for vehicles which concerns on this invention. It is a flowchart which shows the operation example of the power supply control apparatus for vehicles which concerns on this invention. It is a flowchart which shows the other operation example of the vehicle power supply control apparatus which concerns on this invention.

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 control device according to the present invention.
In this vehicle power supply control device, an alternator (on-vehicle generator, AC generator) 8 generates power in conjunction with an engine (not shown). The electric power generated by the alternator 8 is rectified in the alternator 8 and charged to the battery 6.

The output voltage of the battery 6 is applied to, for example, the air conditioner 10, the defogger 11 (defogger), and the navigation device 12 through the ignition switch 7 interlocked with the ignition key 9, for example. The output voltage of the battery 6 is also applied to other electric loads through the ignition switch 7 and the power line 5.
The alternator 8, the ignition key 9, the air conditioner 10, the defogger 11, and the navigation device 12 have ECUs (Electronic Control Units) 13, 14, 15, 16, and 17, respectively. The output voltage of the battery 6 is directly applied to each ECU 13, 14, 15, 16, 17.

Each ECU 13, 14, 15, 16, 17 is connected to the determination processing unit 2 of the power supply controller 1 through the signal line 4, and exchanges control signals. The determination processing unit 2 includes a clock 2 a and is connected to the storage unit 3, and performs writing to the storage unit 3 and reading from the storage unit 3. The power supply controller 1 is directly applied with the output voltage of the battery 6. Further, the power supply controller 1 has a built-in voltage detector 21 that detects the output voltage value Vb of the applied battery 6.
The air conditioner 10, the defogger 11, and the navigation device 12 have operation switches 18, 19, and 20 for power supplies, respectively, and also have changeover switches for setting operation levels and the like (not shown).

Below, the operation example of the vehicle power supply control apparatus of such a structure is demonstrated, referring the flowchart of FIGS.
FIG. 2 is a flowchart showing an operation example of collecting an operation history of individual electric loads. The power supply controller 1 collects an operation history for each electric load.
First, the determination processing unit 2 acquires a state signal of the ignition key 9 from the ECU 14 (S1), and determines whether or not the ignition key 9 is turned on (S3).

If the ignition key 9 is turned on (S3), the determination processing unit 2 measures a period (vehicle operation period) Td during which the ignition key 9 is on (S5). Next, the determination processing unit 2 acquires a load state signal from the ECU of the electric load (S7), and determines whether or not the electric load is on (S9).
If the electrical load is turned on (S9), the determination processing unit 2 counts the period during which the electrical load is on (the operation period of the electrical load) Tw (S11) and returns.

If the electrical load is not turned on (S9), the determination processing unit 2 determines whether or not the period Tw during which the electrical load is turned on is equal to or longer than a predetermined time Tc (for example, several minutes). Is determined (S13).
If the period Tw is equal to or longer than the predetermined time Tc (S13), the determination processing unit 2 stores (writes) the period Tw in which the electric load is turned on together with the date in the storage unit 3 (S15). ). If the period Tw is not equal to or longer than the predetermined time Tc (S13), the determination processing unit 2 resets the period Tw (S17) and returns.

  If the ignition key 9 is not on (S3), the determination processing unit 2 determines whether or not the period Td during which the ignition key 9 is on is equal to or longer than a predetermined time Tc (for example, several minutes). (S19). If the period Td is not equal to or longer than the predetermined time Tc (S19), the determination processing unit 2 resets the periods Td and Tw at that time (S31) and returns.

If the period Td is equal to or longer than the predetermined time Tc (S19), the determination processing unit 2 stores the periods Td and Tw at that time in the storage unit 3 together with the date (S21), and then resets the periods Td and Tw. (S23).
Next, the determination processing unit 2 calculates the total ΣTd of the period Td of a predetermined period (for example, one month) stored in the storage unit 3 and the total ΣTw of the period Tw of the predetermined period (S25).
Next, the determination processing unit 2 calculates the history Hw = ΣTw / ΣTd of the electric load based on the calculated total ΣTd and total ΣTw (S25) (S27). Next, the determination processing unit 2 stores and updates the calculated history Hw of the electric load in the storage unit 3 (S29) and returns.

FIG. 3 is a flowchart illustrating an operation example for setting power supply to an electric load. The power controller 1 sequentially sets power supply for each electric load.
First, the determination processing unit 2 acquires a state signal of the ignition key 9 from the ECU 14 (S41), and determines whether or not the ignition key 9 is turned on (S43).

If the ignition key 9 is not turned on (S43), the determination processing unit 2 returns.
If the ignition key 9 is on (S43), the determination processing unit 2 reads the electrical load history Hw from the storage unit 3 (S45). The determination processing unit 2 determines whether or not the read history Hw of the electric load is 0.5 or more, for example (S47).
If the history Hw is 0.5 or more (S47), the determination processing unit 2 sets the electric load to ON through each ECU (S49). If the history Hw is not 0.5 or more (S47), The electric load is set to OFF through the ECU (S53).

Next, the determination processing unit 2 determines whether or not the next electrical load history Hw exists in the storage unit 3 (S51), and if the next electrical load history Hw exists in the storage unit 3, the history Hw. Is read (S45).
The determination processing unit 2 reads the output voltage value Vb of the battery 6 detected by the voltage detector 21 (S55), if the history Hw of the next electric load is not in the storage unit 3 (S51), and the output voltage value of the battery 6 It is determined whether or not Vb is lower than a predetermined voltage value Vc (S57).

If the output voltage value Vb of the battery 6 is lower than the predetermined voltage value Vc (S57), the determination processing unit 2 turns off the electric load from the smaller history Hw stored in the storage unit 3 and turns it off. The total power consumption of the electrical load thus made reaches the predetermined power (S59).
Next, the determination processing unit 2 acquires a state signal of the ignition key 9 from the ECU 14 (S61), and determines whether or not the ignition key 9 is turned on (S63). If the ignition key 9 is not turned on (ignition switch 7 off) (S63), the determination processing unit 2 turns off all the electrical loads that have acquired the history Hw (S65) and returns. Here, an accessory switch (not shown) is assumed to be interlocked with the ignition switch 7.

If the ignition key 9 is on (S63), the determination processing unit 2 reads the output voltage value Vb of the battery 6 detected by the voltage detector 21 (S55).
If the output voltage value Vb of the battery 6 is not lower than the predetermined voltage value Vc (S57), the determination processing unit 2 acquires the state signal of the ignition key 9 from the ECU 14 without turning off the electric load (S61).

FIG. 4 is a flowchart showing an operation example in the case of collecting the operation level together with the operation history of individual electric loads.
First, the determination processing unit 2 acquires a state signal of the ignition key 9 from the ECU 14 (S71), and determines whether or not the ignition key 9 is turned on (S73).
If the ignition key 9 is turned on (S73), the determination processing unit 2 counts the period (vehicle operation period) Td during which the ignition key 9 is on (S75). Next, the determination processing unit 2 acquires a load state signal from the ECU of the electric load (S77), and determines whether or not the electric load is on (S79).

If the electric load is on (S79), the determination processing unit 2 measures a period Tw during which the electric load is on (S81). Next, the determination processing unit 2 acquires the operation level Lw set for the electric load from the ECU of the electric load, stores it in the storage unit 3 (S83), and returns. In order to reduce the amount of data stored in the storage unit 3, the operation level Lw may be acquired, for example, every time the period Tw increases for a predetermined time (for example, several minutes). Further, when the operation level Lw is set to, for example, “high”, “medium”, “low”, “large”, “medium”, and “small”, numerical values such as “3”, “2”, and “1” are set. Keep it.
If the electrical load is not turned on (S79), the determination processing unit 2 determines whether or not the period Tw during which the electrical load is turned on is equal to or longer than the predetermined time Tc (S85). ).

If the period Tw is equal to or longer than the predetermined time Tc (S85), the determination processing unit 2 stores the period Tw in which the electric load is turned on in the storage unit 3 together with the date (S87). If the period Tw is not equal to or longer than the predetermined time Tc (S85), the determination processing unit 2 resets the period Tw (S89) and returns.
If the ignition key 9 is not turned on (S73), the determination processing unit 2 determines whether or not the period Td during which the ignition key 9 is turned on is equal to or longer than the predetermined time Tc (S91). If the period Td is not equal to or longer than the predetermined time Tc (S91), the determination processing unit 2 resets the periods Td and Tw at that time and the operation level Lw stored in the storage unit 3 (S103) and returns.

If the period Td is equal to or longer than the predetermined time Tc (S91), the determination processing unit 2 stores the periods Td and Tw at that time together with the date in the storage unit 3 (S93), and then resets the periods Td and Tw. (S95).
Next, the determination processing unit 2 calculates the total ΣTd of the period Td of a predetermined period (for example, one month) stored in the storage unit 3, the total ΣTw of the period Tw of the predetermined period, and the moving average Lwa of the operation level Lw. (S97).
Next, the determination processing unit 2 calculates the history Hw = ΣTw / ΣTd of the electric load based on the calculated total ΣTd and total ΣTw (S97) (S99). Next, the determination processing unit 2 stores and updates the calculated history Hw of the electric load and the moving average Lwa of the operation level in the storage unit 3 (S101), and returns.

When setting the power supply to the electric load (FIG. 3), the determination processing unit 2 sets the moving average Lwa that is the highest in the moving average Lwa when setting the ON for the electric load obtained by collecting the moving average Lwa of the operation level (S49). Set to a near operational level.
Further, the determination processing unit 2 turns off the electric load from the smaller history Hw stored in the storage unit 3 so that the total power consumption of the turned off electric load reaches a predetermined amount of power. In this case (S59), the power consumption corresponding to the operation level is totaled. Other operations are the same as those described with reference to FIG.

DESCRIPTION OF SYMBOLS 1 Power supply controller 2 Determination processing part (collection means, reference means, determination means)
2a Clock 3 Storage section (storage means)
4 Signal line 5 Power line 6 Battery 7 Ignition switch 8 Alternator 9 Ignition key 10 Air conditioner 11 Defogger 12 Navigation device 13, 14, 15, 16, 17 ECU
18, 19, 20 Operation switch 21 Voltage detector

Claims (4)

In a vehicle power supply control device that controls power supply from a battery to a plurality of loads that can be operated when an ignition key is on,
The collecting means for collecting the operation history for each load, the storage means for storing the operation history for each load collected by the collecting means, and the storage means are stored when the ignition key is turned on. Reference means for referring to an operation history for each load, and when the ignition key is turned on, the power supply to the load is turned on or off based on the operation history for each load referred to by the reference means. A power supply control device for a vehicle, characterized by being controlled.   The vehicle power supply control device according to claim 1, wherein the operation history is a ratio of a period during which the ignition key is on and a period during which the load is operated during a most recent predetermined period.   A voltage detector for detecting an output voltage value of the battery; and means for determining whether the output voltage value detected by the voltage detector is lower than a predetermined voltage value. 3. The vehicle power supply control device according to claim 1, wherein when it is determined to be low, the power supply is turned off from a load having a short operating period of the operation history. 4.   The load can be set to a variable operation level in a stepwise manner, and the operation history of the load includes a moving average of the operation level during the most recent predetermined period, and the ignition key is turned on. The vehicle power supply control device according to claim 2 or 3, wherein when the power supply to the load is turned on, an operation level is set based on the moving average.

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