JPH1070843A - Battery power supply for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery power supply easily capable of preventing low battery when power generation is stopped for a long period of time as in the case of vehicle transportation. SOLUTION: A power supply line switching means RY is provided on a power supply line connecting a load AY to a battery 14 requiring a power source at all times as in the case of an electronic control unit or a clock. When an operation signal S1 indicating the start of transport is obtained, the power source line switching means RY is controlled to an open state by switching control means 40-1. By doing this. low battery caused by a dark current can be prevented easily only by numbering the operating portion without doing fuse pull-out work during vehicle transportation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery power supply device for a vehicle, and is suitably applied, for example, to avoid running out of a battery during transportation of the vehicle.

[0002]

2. Description of the Related Art In a conventional vehicle power supply device, as shown in FIG. 7, electric power output from a battery 1 provided in an engine room of a vehicle body is supplied by a fuse box (not shown) provided near the battery 1. Via the fusible link 2 housed in the engine room and the battery power line L1 arranged in the engine room to reach the ignition key switch 3 in the driver's seat.
Fuses 4a to 4c in a fuse box (not shown) arranged inside the cowl side of the driver's seat according to each position of
4c and power lines L1a to L1c, the power is supplied to each load provided in each section of the vehicle, and the battery 1
For example, a clock 6 or an electronic control unit (so-called ECU (Electoronic Control Unit) 7) that requires constant power supply via a fuse 5 housed in a fuse box (not shown) provided near the battery and a battery power line L2. It is also supplied to the load.

[0003]

By the way, in recent years, the technology of controlling each part of the vehicle by electronic control has been rapidly advanced, and the number of electronic control units 7 mounted on the vehicle has also been rapidly increased accordingly. . The electronic control unit 7 generally includes a CPU (Central Processing Unit) for performing various arithmetic processing and a ROM (read onl) storing a processing program of the CPU.
y memory) and a RAM (random access memory) in which data processed by the CPU and processing results by the CPU are stored.

Here, in order to hold the data stored in the RAM of the electronic control unit 7, it is necessary to always supply a battery power to the electronic control unit 7 (a so-called backup power supply).
As the power supply increases, the power supply amount also tends to increase.

Therefore, when the vehicle is to be transported for a long time, the ignition key switch 3 is turned off and the fuses 4a to 4c and the power lines L1a to L1
In addition to stopping the supply of the battery power to the load connected to the battery 1 via the L1c, the battery power is also supplied to a load requiring constant power supply, such as the clock 6 and the electronic control unit 7, for example. Supply must be stopped.

For this reason, conventionally, a so-called fuse removal operation for removing the fuse 5 provided on the power supply line L2 connecting the battery 1 with the timepiece 6 and the electronic control unit 7 before long-time transportation is performed. The operation of connecting the fuse 5 to the original position again is performed to prevent the battery from running down during transportation.

[0007] However, it is very troublesome to perform such a fuse removing operation for all vehicles to be transported and to connect a fuse to all vehicles whose transportation has been completed. There was a problem that took extra time.

Further, if a fuse removing operation is performed,
The power is not supplied to the electronic control unit 7 or the clock 6 which normally requires power supply, and the electronic control unit 7
There is a problem that the stored information stored in the clock 6 is lost. In order to solve this problem, it has been proposed to provide a small battery as a backup power source separately from the battery 1, for example. However, in such a case, there is a problem that the configuration becomes more complicated.

The present invention has been made in consideration of the above points. For example, it is possible to easily prevent the battery from running down when power generation is stopped for a long period of time, such as when transporting a vehicle, and at that time, power is always supplied. An object of the present invention is to propose a battery power supply device for a vehicle that can effectively prevent a required load from losing information with a simple configuration.

[0010]

A battery power supply device for a vehicle according to the first aspect of the present invention, which has been made in accordance with the present invention to solve such a problem, is mounted on a vehicle as shown in the basic configuration diagram of FIG. Power supply device for supplying battery power from the battery 14 to a load mounted on the vehicle, provided on a power line connecting the load AY, which requires constant power such as an information holding circuit, to the battery 14 and the battery 14. Power line opening / closing means RY, an operation signal output means for outputting an operation signal S1 corresponding to the operation when the operator operates a predetermined operation unit of the vehicle, and a power line opening / closing means RY in response to the input of the operation signal S1. And an open / close control means 40-1 for controlling the open state.

In the above configuration, the open / close control means 40-1 controls the power supply line open / close means RY to the open state in response to the input of the operation signal S1, so that the constant power supply of the information holding circuit and the like is operated in response to the operation signal S1. The required supply of battery power to the load AY can be stopped. As a result, it is possible to easily prevent the battery from being discharged due to the dark current simply by operating the operation unit, for example, without performing the fuse removing operation when transporting the vehicle.

According to a second aspect of the present invention, a battery power supply apparatus according to the present invention further includes, after an operation signal S1 is output, in addition to the first aspect, as shown in FIG. A vehicle state signal S indicating the state of the vehicle, such as half-door information or door lock information output from a predetermined portion of the vehicle.
2 is provided with a transportation state detecting means 40-2 for detecting that the vehicle is in a transportation state by monitoring the operation signal S1, and the opening / closing control means 40-1 receives the operation signal S1 and receives the transportation state detection means 40- 2, when the vehicle is detected to be in the transport state, the power supply line opening / closing means RY is controlled to the open state.

In the above configuration, the supply of the battery power to the load AY which requires the constant power supply, such as the information holding circuit, is stopped only when the operation signal S1 is output and the vehicle is actually put into the transport state. For example, when a vehicle is loaded on a ship or the like, the load AY operates normally, and as a result, the workability during such loading can be improved.

According to a third aspect of the present invention, there is provided a battery power supply device which further comprises, after an operation signal S1 is output, in addition to the first aspect, as shown in the basic configuration diagram of FIG. A vehicle state signal S indicating the state of the vehicle, such as half-door information or door lock information output from a predetermined portion of the vehicle.
2, the transportation state detecting means 40-2 for detecting that the vehicle is in a transportation state, and operates even when an ignition switch of a headlight, a tail lamp, an interior lamp, etc. among the loads of the vehicle is off. The power supply line switching means R1 to Rn provided on the power supply line connecting the loads A1 to An and the battery 14 which are enabled, and the transportation state detection means 40-2 have detected that the vehicle is in the transportation state. At this time, an opening / closing control means 40-1 for controlling the power line opening / closing means R1 to Rn to an open state is provided.

In the above configuration, the opening / closing control means 40-
1 indicates that when the transportation state detecting means 40-2 detects that the vehicle is in the transportation state, the supply of the battery power to the load AY which requires a constant power supply such as an information holding circuit is stopped. Then, the supply of the battery power to the loads A1 to An that can be operated even when the ignition switch of the headlight, the tail lamp, the interior lamp or the like is off is stopped. As a result, the battery is prevented from being discharged due to the dark current, and the battery is also prevented from being discharged due to forgetting to turn off the headlight, the tail lamp, the interior lamp, and the like.

According to a fourth aspect of the present invention, there is provided a battery power supply apparatus for controlling a vehicle such as a headlight, a tail lamp, an interior lamp, etc., from a load of a vehicle even after the operation signal S1 is output. The power supply of the battery is continued for the loads A1 to An required for loading the battery.

In the above configuration, when loading the vehicle,
Since the headlight, the tail lamp, the interior lamp, and the like can be operated, the workability at the time of loading can be improved.

According to a fifth aspect of the present invention, there is provided a battery power supply device comprising at least one of a plurality of electronic control units mounted on a vehicle when the operation signal output means outputs the operation signal. For one, it is made operable by supplying the power of the battery 14,
After storing information stored in a load that requires a constant power supply, such as an information holding circuit, in an information holding circuit in the operable electronic control unit, a battery power supply to the load is stored. Supply was cut off.

Here, if the power supply to all the electronic control units is stopped when the operation signal S1 is input, all the stored information stored in the information storage means in the electronic control units will be lost. Will disappear. However, in the configuration of this claim, the information stored in the information holding circuit of the electronic control unit whose power supply is stopped is stored and held collectively in the information holding circuit of the electronic control unit whose power supply is not stopped. Therefore, the number of electronic control units that need to supply battery power can be effectively reduced, the possibility of running out of the battery can be reduced, and the loss of the held information at this time can be prevented.

In the battery power supply device according to the present invention, when the operation signal output means outputs the operation signal S1, the operation speed of the electronic control unit operable is normally reduced. It was made slower than the operation speed of.

In the above configuration, if the operating speed of the electronic control unit that is enabled (that is, the power supply is not stopped) becomes lower than the normal operating speed, the amount of electricity consumed by the electronic control unit becomes smaller. As a result, the possibility of a dead battery is further reduced.

According to a seventh aspect of the present invention, there is provided a battery power supply device comprising:
When the first operation signal is input, the power supply line switching means R
In addition to controlling Y to be in the open state, when the second operation signal S1 is input thereafter, the power supply line opening / closing means RY opened based on the first operation signal S1 is returned to the closed state.

In the above configuration, the operator changes the power supply line opening / closing means RY from the open state to the closed state by the same operation of the same operation section operated when the power supply line opening / closing means RY is changed from the closed state to the open state. Since the operation can be returned, the operation can be simplified.

In the battery power supply device according to claim 8 of the present invention, the open / close control means 40-1 comprises:
When a predetermined combination of operation signals S1 is input from the operation signal output unit by operating a plurality of operation units provided in the vehicle in a predetermined combination by the operator, the power line opening / closing unit RY is opened. Controlled.

In the above configuration, the opening / closing control means 40-
When the existing operation unit is operated, it is possible to easily identify from the combination of the operations of the operation unit that an operation for instructing to control the power line opening / closing means RY to the open state has been performed.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. (1) Overall Configuration In FIG. 2, reference numeral 10 denotes an overall embodiment of a vehicle battery power supply device according to the present invention. The battery power supply device 10 has three junction boxes 11, 12 and 13 provided at distant parts of the vehicle. The junction box 11 is arranged near the battery 1 in the engine room, and the junction box 12
And 13 are arranged, for example, on the cowl side near the driver's seat.

Here, the junction box 11 and the junction boxes 12 and 13 are connected to each other by a power supply line, and the power generated by the battery 14 and the generator (alternator) 15 is supplied to the junction boxes 12 and 13 through the power supply line. Supplied. Further, the fusible links FL1 and FL2 are connected to the power supply line, and the ignition of the power supply line when the power supply line is short-circuited is prevented by the fusible links FL1 and FL2.
A starter motor 16 is connected to the battery 14.

The junction box 11 is provided with a switch group 200 composed of a plurality of relays. Each relay of the switch group 200 is turned on / off by a switching signal from the arithmetic control unit 20A of the junction box control unit 20. By doing
Power is selectively supplied to each load connected to each relay.

The power supply line L1 connecting the junction box 11 and the junction box 12 is connected to a predetermined relay of a switch group (consisting of a plurality of relays) 201 in the junction box 12 and connects the ignition switch 34 to the power supply line L1. It is connected to a predetermined relay and a junction box control unit 21 through the relay.

The power supply line L2 is connected to a predetermined relay of the switch group 201 and the junction box control unit 21 via an ignition switch 34, and each relay of the switch group 201 is operated by the operation of the junction box control unit 21. Power is selectively supplied to each load connected to each relay by being turned on / off by a switching signal from the control unit 21A. At this time, the arithmetic control unit 21A switches the power supply to each load in accordance with the switching position of the ignition switch 34.

The arithmetic control unit 21A also transmits the position information of the ignition switch 34 to the other arithmetic control units 20A and 22A via the signal transmission line 100, and the arithmetic control units 20A and 22A also respond to the position of the ignition switch 34. To switch the power supply to each load.

A power supply line L3 connecting the junction box 11 and the junction box 13 is a group of switches (comprising a plurality of relays) in the junction box 13.
202 and the junction box control unit 22, and the arithmetic control unit 22A switches on and off the relays in the switch group 202, thereby selectively supplying power to a plurality of loads connected to the switch group 202. Is supplied.

Here, the junction boxes 11 to 13
Is a so-called electronic control unit, for example, a storage unit such as a RAM or a ROM, and a CPU that operates according to a predetermined program stored in the ROM.
(Central processing unit) and microcomputer control units 20A, 21A, 22A and transmission / reception units 20B, 21B, 22B of other junction boxes.
Transmission / reception units 20B, 21 for transmitting and receiving signals and data to and from the device via a signal transmission line 100 as a multiplex communication line.
B, 22B.

More specifically, each operation control unit 20A, 21
A, 22A, the RAM obtained in the own box by the monitoring function, the transmission and reception units 20B,
A predetermined area for storing data on other boxes obtained through 1B and 22B is formed, and the data stored in the predetermined area is used for various processes by the CPU.

The data transmitted through the signal transmission line 100 is transmitted to and received from the transmission / reception units 20B, 21B and 22B of the junction boxes 11, 12 and 13 and the control units 30 and 31 of the electronic control unit constituting the car computer. 3
The time division multiplexed data is formed by a time division method according to a predetermined format by the transmission / reception units 30B, 31B, 32B, and 33B of 2, 33.

The control unit 30 is provided to control the anti-lock brake system well. Specifically, the control unit 30 inputs vehicle speed information, and the CPU 30A controls the vehicle deceleration based on the vehicle speed information. By detecting the rotation of the tire and comparing the two decelerations, when the deceleration of the tire increases, a control signal for instructing to reduce the oil pressure applied to the wheel cylinder is transmitted to the wheel cylinder driving unit to lock the tire. prevent.

The control section 31 is provided to control the meters satisfactorily. Specifically, the control section 31 inputs vehicle speed information and fuel information and, based on the information, speedometer, fuel gauge, etc. And a meter drive command signal for driving the various meters is sent to the meter drive unit.

The control section 32 is provided to control the air suspension satisfactorily. Specifically, the control section 32 receives oil pressure information from a wheel cylinder, forms a compressor control signal based on the information, and generates a compressor control signal. Send to compressor. Further, the control unit 33 is provided to control the air conditioner satisfactorily. Specifically, the control unit 33 inputs operation signals such as temperature setting information from an operation panel and also inputs room temperature information, and controls the room temperature. An air conditioner control signal is generated so as to approach the set temperature.

The control signals formed by the control units 30 to 33 are sent directly to the respective control targets, and the signal transmission lines 1
00 through the junction box control unit 20
To junction box 11
The power supply to the control target is controlled by turning on / off the switch in the switch 12 in response to the control signal.

FIG. 3 shows a junction box 1
1 shows a detailed configuration of the power supply 1 and a state of a load connected to the junction box 11. The junction box control unit 20 stabilizes the power supply by the regulator 44 and supplies it to the arithmetic and control unit 20A.

The arithmetic control unit 20A includes a CPU 40 and a ROM 41 in which a processing program of the CPU 40 is stored.
And a RAM for storing processing results of the CPU 40 and reception data obtained through the transmission / reception unit 21B. The arithmetic control unit 20A has a control voltage generation circuit 43, which is controlled by the CPU 40 and responds to the command of the CPU 40 to each control input terminal of each of the transistors Tr1 to TrY connected to the subsequent stage. Apply control voltage.

A power stabilized by the regulator 44 is input to the input terminals of the transistors Tr1 to TrY, and relays R1, R2, R3,... r1, ..., r
m, RY are connected, and these relays R1, R2, R
3,..., Rn, r1,..., Rm, RY The output voltages of the transistors Tr1 to TrY are respectively applied to the control coils.

Thus, each of the relays R1, R2, R3,.
, Rn, r1,..., Rm, RY are closed when the corresponding transistors Tr1 to TrY are on-controlled, and the loads A1, A2, A3,.
Power is supplied to An, B1,..., Bm, AY. On the other hand, each relay R1, R2, R3,..., Rn, r1,.
rm and RY are opened when the corresponding transistors Tr1 to TrY are off-controlled, and the loads A1, A2, A3,..., An, B1,.
Stop power supply to AY.

Here, each of the relays R1, R2, R3,.
Loads A1, A2, A3,... after n, r1,.
.., An, B1,..., Bm are connected to a headlight, a tail lamp, a fog lamp,..., An interior light, an air conditioner (A / C),.

Here, the load A1, represented as group A in the figure,
A2, A3,..., An are loads that can be operated even when the ignition switch 34 is in the OFF position (that is, the relay R is operated even when the ignition switch 34 is in the OFF position).
1, R2, R3,..., Rn are controlled to be closed), and loads B1,..., Bm represented as group B are loads that cannot be operated when the ignition switch 34 is in the OFF position. (That is, when the ignition switch 34 is
When in the FF position, relays R1, R2, R3,.
Rn is controlled to the open state).

A load AY is connected to a stage subsequent to the relay RY. Here, the load AY collectively represents loads having an information holding function and loads requiring constant power supply such as a clock. Here, the loads having the information holding function are, for example, the junction box control units 21 and 22, the control units 30 to 33, and the radio (not shown) in FIG.

As described above, in this embodiment, the relay RY is also provided on the power supply line for connecting the load AY and the battery 14 which are always required to be constantly supplied.
By opening the relay RY when the vehicle is transported, it is possible to easily prevent the battery from running out during the transport of the vehicle without performing a fuse removing operation as in the related art.

(2) Processing at the time of transportation In practice, the battery power supply device 10 is operated by the arithmetic control unit 20 A of the junction box control unit 11.
Battery exhaustion prevention processing routine RT as shown in FIG.
By executing step 1, the battery is prevented from running down during transportation.

That is, when the CPU 40 of the arithmetic and control unit 20A inputs the transport start signal S1 from the operator via the signal transmission line 100 and the transmitting and receiving unit 20B in step SP1, the process proceeds to step SP2. Here, in the case of this embodiment, a switching operation button provided on the instrument panel (not shown) for switching the display between the odometer and the trip meter, and a reset button for resetting the display of the trip meter to zero are provided. The transport start signal S1 is output from a panel control unit (not shown) when pressed simultaneously for two seconds or more.
As described above, in this embodiment, the transport start time can be designated by operating the existing operation buttons without adding new parts.

At step SP2, the CPU 40 performs processing for storing held information. The storage processing of the held information is as follows.
This means that stored information S5 such as stored information, radio channel selection information, and clock alarm information stored in the memory of each electronic control unit is collectively stored in the RAM 42 via the signal transmission line 100.

That is, in the battery power supply device 10,
Since the power supply to the load AY requiring the dark current is stopped during the transportation of the vehicle, the stored information S5 stored in the load AY requiring the dark current during the transportation may be lost. . Therefore, the battery power supply 10
In, by performing the above-described stored information storage processing (step SP2), the loss of the stored information of the load for which the power supply is stopped is avoided.

In practice, the stored information storage process (step S
P2) is performed as shown in FIG. That is, C
In step SP2-1, the PU 40 transmits the storage holding information S5 stored in its own memory to another electronic control unit (indicating the load AY in FIG. 3) in the signal transmission line 100.
And the stored information S5 transferred in step SP2-2 is stored in the RAM 42. In step SP2-3, the storage processing of the stored information is terminated, and the process returns to the main routine.

The CPU 40 stops the supply of the battery power to the load AY by controlling the opening of the relay RY in step SP3. As a result, the dark current during transportation is completely shut off. In the following step SP4, the signal transmission line 1
It is determined whether or not long-term transportation has been started based on a vehicle state signal S2 such as half-door information or door lock information input via 00.

That is, if the vehicle is half-door or the door is unlocked, it is determined that the vehicle has not started long-term transportation yet, and the process proceeds to step SP6, where the vehicle is not half-door and the door is locked. In this case, it is determined that the long-term transport has been started, and the routine goes to Step SP5.

At step SP6, it is determined whether or not the engine is operating.
To control the closing of the relays R1 to Rn so that the headlight A1, the tail lamp A2, the fog lamp A3,.
..., the interior lights An and the like are made operable. Here, processing such as steps SP4-SP6-SP7 is performed.
Even after the input of the transport start signal S1 is confirmed in step SP1, for example, an operation such as running the vehicle and loading the ship may be performed. In such a case, the headlight A1, the tail lamp A2, This is because it is necessary to operate the fog lamps A3,..., The interior lights An and the like.

In step SP5, the CPU 40 switches itself to the sleep mode by, for example, reducing the operation clock of the CPU 40, thereby saving current consumption. Incidentally, at the stage of step SP5, the load to which the battery power is supplied is only the arithmetic control unit 20A.

In the following step SP8, the CPU 40 waits for the transport end signal S4, and when the transport end signal S4 is input, proceeds to step SP9. Here, in the case of this embodiment, when the transport start signal S1 described above is input again, this is detected as a transport end signal S4. That is, a switching operation button for switching the display of the odometer and the trip meter again by the operator,
When the reset button for resetting the display of the trip meter to zero is simultaneously pressed for two seconds or more, it is determined that the transportation end is notified.

The CPU 40 cancels the sleep mode by returning its operating clock to the original frequency in step SP9, and restarts the supply of battery power to the load AY by controlling the closing of the relay RY in the following step SP10. .

Next, the CPU 40 performs a process of transferring the stored information in step SP11. The transfer processing of the storage information is to store and hold the holding information, the radio channel selection information, the clock alarm information, and the like stored in the memories of the other electronic control units which are collectively stored in the RAM 42 in the above-described step SP2. This means that the information S5 is transferred to the original storage unit via the signal transmission line 100.

In practice, the storage information transfer processing (step S
P11) is performed as shown in FIG. That is, the CPU 40 determines in step SP11-1 that the RAM 4
2 is read out, and in the following step SP11-2, the stored information S5 is transferred via the signal transmission line 100, and the following step SP11-3 is performed.
Instructs the destination electronic control unit, radio, clock, etc. to store the stored information S5 that it has in its own memory, and ends the storage information transfer process (step SP11) in step SP11-4. I do.

(3) Operation and Effect of Embodiment In the above configuration, the battery power supply device 10 of this embodiment has a switching operation button for switching the display between the odometer and the trip meter by the operator, and the display of the trip meter to be zero. When the reset button for resetting the button is simultaneously pressed for two seconds or more, a transport start signal S1 is output from a panel control unit (not shown) as an operation signal output unit.

When the transport start signal S1 is input to the arithmetic and control unit 20A via the signal transmission line 100, the arithmetic and control unit 20A transmits the signal to the arithmetic and control unit 20A via the signal transmission line 100, such as a load or a clock having an information holding function. The information held by the load AY, which collectively represents loads that require continuous power supply, is received, and the held information is stored in the RAM 42.

When the held information storage processing is completed, the arithmetic and control unit 20A stops the supply of the battery power to the load AY by opening the relay RY. As a result,
Even if the fuse is not removed during transportation of the vehicle, it is possible to easily prevent the battery from being discharged due to the dark current simply by operating the operation unit, and to hold the load AY in which the supply of the dark current is stopped at this time. Loss of information can be prevented.

In the battery power supply device 10, the operation speed of the arithmetic and control unit 20A of the junction box 20, to which only battery power is supplied when the vehicle is transported, is made slower than the normal operation speed. In addition, since the amount of current consumed by the arithmetic and control unit 20A is reduced, a decrease in battery capacity during transportation can be further suppressed.

(4) Other Embodiments In the above-described embodiment, the case where the battery power supply device according to the present invention is applied at the time of transporting a vehicle has been described. However, the present invention is not limited to this. In this case, the same effect as in the above embodiment can be obtained. In this case, when the long-term parking starts, the switching operation button for switching the display of the odometer and the trip meter and the reset button for resetting the display of the trip meter to zero are simultaneously pressed for two seconds or more as in the above-described transportation start. Just keep going.

In the above-described embodiment, when the operator presses the switching operation button for switching the display of the odometer and the trip meter and the reset button for resetting the display of the trip meter to zero simultaneously for more than two seconds, Although the case where the transport start signal S1 is output from the panel control unit as the operation signal output unit has been described, the present invention is not limited to this, and if an existing operation unit is used, it is provided in the vehicle in advance by the operator. When a predetermined combination of operation signals is input from the operation signal output unit by operating a plurality of operation units in a predetermined combination, the power line opening / closing unit may be controlled to the open state. The present invention is not limited to this, and an operation unit for newly instructing the start of transportation may be provided, and the relay RY may be opened when the operation unit is operated.

In the above-described embodiment, the supply of battery power to the load AY, which always requires power supply, is stopped during transportation of the vehicle, thereby preventing the battery from running down due to dark current during transportation of the vehicle. Although the case has been described, the present invention is not limited thereto. If the supply of power is stopped, it is possible to prevent the battery from being exhausted due to the dark current, and also to prevent the battery from being exhausted due to forgetting to turn off the headlight, tail lamp, indoor lamp, and the like.

In the above embodiment, the case where a relay is used as the power supply line opening / closing means has been described. However, the present invention is not limited to this. For example, various power supply line opening / closing means such as a semiconductor switch and an intelligent power switch may be used. Can be used.

[0069]

As described above, according to the first aspect of the present invention, it is possible to easily prevent the battery from running down due to dark current during vehicle transportation or long-term parking of the vehicle.

According to the second aspect of the invention, when the vehicle is transported, for example, when the vehicle is loaded on a ship or the like, the load AY operates as usual, so that the workability at the time of loading can be improved.

According to the third aspect of the present invention, it is possible to prevent the battery from being exhausted due to the dark current and also to prevent the battery from being exhausted due to forgetting to turn off the headlights, tail lamps, indoor lamps, and the like.

According to the fourth aspect of the present invention, the headlights, tail lamps, interior lamps, and the like can be operated when the vehicle is loaded, so that the workability at the time of loading can be improved. .

According to the fifth aspect of the present invention, the number of electronic control units that need to supply battery power can be effectively reduced to reduce the possibility of running out of the battery and to prevent the loss of the held information at this time. Can be prevented.

According to the sixth aspect of the present invention, the amount of electricity consumed by the electronic control unit operating during transportation is reduced, so that a decrease in the remaining battery level during transportation can be further suppressed.

According to the seventh aspect of the present invention, the work of cutting the dark current during transportation by the operator can be further simplified.

Further, according to the eighth aspect of the present invention, since it is possible to instruct the start of transportation using the existing operation unit, it is possible to suppress an increase in the number of parts.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a vehicle battery power supply device according to the present invention.

FIG. 2 is a connection diagram showing one embodiment of a battery power supply device according to the present invention.

FIG. 3 is a connection diagram showing a detailed configuration of a junction box 11 and a load connected to the junction box 11 in FIG.

FIG. 4 is a flowchart illustrating a battery exhaustion processing routine during transportation by an arithmetic control unit 20A of FIG. 3;

FIG. 5 is a flowchart illustrating a held information storage processing subroutine.

FIG. 6 is a flowchart showing a stored information transfer subroutine.

FIG. 7 is a connection diagram illustrating an example of a conventional battery power supply device.

[Explanation of symbols]

14 Battery 40-1 Opening / closing control means (CPU) 40-2 Transportation state detecting means (CPU) AY load (electronic control unit, clock,
Radio, ...) A1 to An load (headlight, tail lamp, fog lamp, interior light, ...) RY, R1 to Rn Power line switching means (relay) S1 Operation signal (transport start signal) S2 Vehicle status signal

Claims (8)

[Claims] 1. A battery power supply device for supplying battery power from a battery mounted on a vehicle to a load mounted on the vehicle, comprising: a load for which a constant power source such as an information holding circuit is required; Power supply line opening / closing means provided on a power supply line to be connected; operation signal output means for outputting an operation signal corresponding to the operation when an operator operates a predetermined operation unit of the vehicle; And a switching control means for controlling the power supply line switching means to an open state. 2. The battery power supply device further includes a vehicle state signal indicating a state of the vehicle such as half door information or door lock information output from a predetermined portion of the vehicle after the operation signal is output. Monitoring means for detecting that the vehicle is in a transportation state, wherein the opening / closing control means receives the operation signal, and the vehicle is in a transportation state by the transportation state detection means; 2. The battery power supply device for a vehicle according to claim 1, wherein when the power supply line is detected, the power supply line opening / closing means is controlled to an open state. 3. The battery power supply device further includes a vehicle state signal indicating a state of the vehicle, such as half-door information or door lock information, output from a predetermined portion of the vehicle after the operation signal is output. By monitoring, the transport state detecting means for detecting that the vehicle is in a transport state, among the load of the vehicle, a headlight, a tail lamp,
A power line opening / closing unit provided on a power line connecting the load and the battery, which is operable even when an ignition switch such as an interior lamp is turned off, and the battery, and the vehicle is in a transportation state by the transportation state detection unit. The battery power supply device for a vehicle according to claim 1, further comprising: an opening / closing control unit that controls the power line opening / closing unit to be in an open state when the power supply line opening / closing unit is detected. 4. The load required for loading the vehicle, such as a headlight, a tail lamp, and an interior lamp, out of the load of the vehicle on a ship or the like, even after the operation signal is output. The battery power supply device for a vehicle according to claim 1, wherein the power supply of the battery is continued. 5. The battery power supply device, wherein when the operation signal is output by the operation signal output means, at least one of a plurality of electronic control units mounted on the vehicle includes a power supply of the battery. To the operable state by supplying the information, and the information holding circuit in the operable electronic control unit stores the held information stored in a load such as the information holding circuit, which requires a constant power supply. After memorizing
The battery power supply device for a vehicle according to claim 1, wherein supply of battery power to the load is cut off. 6. The operation speed of the operable electronic control unit is made lower than a normal operation speed when the operation signal is output by the operation signal output means. The vehicle battery power supply device according to claim 5. 7. The open / close control means controls the power line open / close means to be in an open state when the first operation signal is input, and when the second operation signal is input, 2. The battery power supply device for a vehicle according to claim 1, wherein the power line opening / closing means that has been opened is returned to a closed state based on a first operation signal. 8. The opening / closing control unit receives a predetermined combination of the operation signals from the operation signal output unit when a plurality of operation units provided in advance in the vehicle are operated in a predetermined combination by an operator. 2. The battery power supply device for a vehicle according to claim 1, wherein the power supply line opening / closing means is controlled to be in an open state when the power supply line is opened.