JP2011189804A - Apparatus for control of power supply - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for control of a power supply that controls a standby current with an easy way, depending on a usage condition of a vehicle. <P>SOLUTION: The apparatus for control of the power supply includes: a battery mounted on the vehicle; a fuel measurement device for measuring fuel level of the vehicle; a cutoff device for cutting off the standby current from the battery to the apparatus, after a first cutoff period has passed since the power supply of the vehicle has been turned off; and a changer for changing the first cutoff period to a second cutoff period which is longer than the first cutoff period, when the fuel level measured by the fuel measurement device exceeds a predetermined value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply control device, and more particularly to a power supply control device mounted on a vehicle.

  2. Description of the Related Art Conventionally, there is known a power control device that reduces standby current (sometimes referred to as dark current) supplied to a load (various devices mounted on a vehicle) when the power of the vehicle is OFF. Such a device is provided in a vehicle, especially when a vehicle completed in a factory is transported from the factory to a store or the like, and when a long time is required for the transportation, a so-called battery is installed during the transportation. This is because there is a possibility that the rise will occur. Specifically, for example, a power supply control device supplies power because a device with various information holding functions and the like always needs power supply even during vehicle transportation, and needs power supply during vehicle transportation. The power supply to devices that are not present is cut off to prevent the battery from running out.

  As an example of the power supply control device, for example, there is a device disclosed in Patent Document 1.

Japanese Patent Laid-Open No. 10-70843

  The device disclosed in Patent Document 1 is a device that shuts off power supply to a device that does not require power supply during vehicle transportation when vehicle transportation is started. Specifically, when the operator inputs a transportation start signal, the device disclosed in Patent Document 1 determines that transportation of the vehicle has started, and power to the device that does not require power supply during transportation of the vehicle. Shut off the supply.

  By the way, as a method of cutting off power supply to a device that does not require power supply during vehicle transportation, a fuse for reducing standby current is removed at the time of factory shipment, or the device disclosed in Patent Document 1 above, There was a problem that the operator had to input a transportation start signal, which was troublesome.

  In addition, for example, in order for a customer who visits the dealer to test the vehicle displayed at a dealer, etc., to see the functions of the vehicle indefinitely, the vehicle is generally sent to the dealer, etc. When delivered, insert the fuse removed at the factory. However, on the other hand, if the fuse for inserting the standby current is kept inserted, there is a problem that the standby current increases and the battery runs out, for example, when the test drive is not performed for a long time. .

  The device disclosed in Patent Document 1 does not solve these problems, and a power supply control device that can control standby current according to the use state of the vehicle by a simple method is desired. It was.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power supply control device capable of controlling standby current according to the use state of a vehicle by a simple method. It is in.

  In order to achieve the above object, the present invention employs the following configuration. That is, the present invention is a power supply control device that can control standby current to a device mounted on a vehicle. The power control device includes a battery mounted on a vehicle, fuel measuring means for measuring a remaining amount of fuel of the vehicle, and the battery from the battery after a first cutoff time has elapsed since the vehicle was turned off. In the case where the remaining amount of the fuel measured by the fuel measuring means and the shutoff means for shutting off the standby current to the apparatus exceeds a predetermined value, the first shutoff time is set to be less than the first shutoff time. Changing means for changing to a long second cutoff time.

  ADVANTAGE OF THE INVENTION According to this invention, the power supply control apparatus which can control standby current according to the use condition of a vehicle with a simple method can be provided.

The block diagram which showed an example of the structure of the power supply control apparatus which concerns on one Embodiment of this invention The flowchart which showed an example of the flow of a process with the mode selection means 31 and the opening / closing control means 32 of the power supply control device which concerns on this embodiment.

  Hereinafter, the configuration and operation of a power supply control device according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, description will be made assuming that the power supply control device is installed in a passenger car (hereinafter simply referred to as a vehicle).

  FIG. 1 is a block diagram showing an example of the configuration of a power supply control device according to an embodiment of the present invention. As shown in FIG. 1, the power supply control device according to one embodiment includes a power supply 1, a shut-off device 2, a control ECU (Electrical Control Unit) 3, and a fuel remaining amount measuring device 4. In addition, apparatus A51, apparatus B52, apparatus C53, etc. are connected to the interruption | blocking apparatus 2. FIG.

  The power source 1 is a so-called in-vehicle battery mounted on a vehicle, and is a secondary battery such as a 12V lead storage battery.

  The shut-off device 2 is provided on a power supply path from the power source 1 to the devices A51, B52, C53 and the like which will be described later, and reduces the capacity and deterioration of the power source 1 due to standby current (sometimes referred to as dark current). It is something to prevent. The breaker 2 is specifically a relay, and is configured by various relays (semiconductor relays, mechanical relays, etc.). The shut-off device 2 connects or shuts off the power source 1 and the devices A51, B52, and C53 in accordance with instructions from the control ECU 3 to be described later, and connects the devices A51, B52, and C53 to the devices A51, B52, and C53. Control power supply.

  The control ECU 3 includes mode selection means 31, release means 32, and the like.

  The mode selection means 31 determines whether or not the vehicle is being transported based on information (specifically, information indicating the current fuel remaining amount of the vehicle) output from the fuel remaining amount measuring device 3 described later. And select a mode.

  The open / close control means 32 instructs the shut-off device 2 to connect or shut off the power source 1 and the devices A51, B52, and C53, and supply power to the devices A51, B52, and C53. To control.

  The fuel remaining amount measuring device 3 is a so-called fuel meter that can output information indicating the remaining amount of fuel in the fuel tank of the vehicle. The fuel remaining amount measuring device 3 is a known device that can output information indicating the remaining amount of fuel in the fuel tank of the vehicle, for example, a device that detects a change in the position of a float floating in the fuel tank. Alternatively, a device using a capacitance sensor may be used.

  The devices A51, B52, and C53 are various devices that generally do not require power supply during vehicle transportation. Specifically, for example, there are a security ECU, an ECU for a rear seat door, a room lamp, an audio, and the like. The types and number of the devices A51, B52, and C53 are not limited to the above, and may be various devices that generally do not require power supply during vehicle transportation. In other words, various devices that do not need to be supplied with power when transporting the vehicle need only be connected to the shut-off device 2, and various devices that are generally required to supply power even when transporting the vehicle, for example, holding various information. A device having a function, a power management ECU, an engine ECU, an air conditioner ECU, a driver door ECU, and the like are not connected to the power shutoff device 2.

  Hereinafter, an example of the flow of processing performed in each unit of the power supply control device according to the present embodiment will be described with reference to FIG. FIG. 2 is a flowchart (left of FIG. 2) showing an example of the processing flow of the mode selection unit 31 of the power supply control device according to the present embodiment, and the processing of the opening / closing control unit 32 of the power supply control device according to the present embodiment. It is the flowchart (FIG. 2 right) which showed an example of the flow.

  First, an example of the processing flow of the mode selection means 31 (left side in FIG. 2) will be described.

  In step S <b> 11 of FIG. 2, the mode selection unit 31 determines whether or not an ignition switch (hereinafter simply referred to as “IG”) of the vehicle is turned on. If the mode selection unit 31 determines that the vehicle IG is turned on (YES), the mode selection unit 31 proceeds to the next step S12. On the other hand, if the mode selection means 31 determines that the IG of the vehicle is not turned on (NO), the mode selection means 31 returns the process to step S11. That is, the mode selection means 31 can proceed to the next process when the IG of the vehicle is turned on.

  In step S12, the mode selection means 31 acquires information indicating the remaining amount of fuel in the fuel tank of the vehicle from the fuel remaining amount measuring device 4, and proceeds to the next step S13.

  In step S13, the mode selection means 31 determines whether or not the remaining amount of fuel in the vehicle fuel tank is greater than or equal to a threshold value L based on the information indicating the remaining amount of fuel in the vehicle fuel tank acquired in step S12. Determine whether. And mode selection means 31 advances processing to the following step S14, when the judgment of the said step S13 is affirmed (YES). On the other hand, the mode selection means 31 will advance a process to step S16, when the process of the said step S13 is denied (NO).

  As will become apparent from the description below, the threshold value L is injected when the vehicle is delivered to the customer or when the customer purchases the vehicle and actually uses the vehicle. What is necessary is just to set as the quantity of the fuel to be.

  In step S14, the mode selection means 31 sets the transport mode flag to OFF, and outputs the flag information to the opening / closing control means 32 in the next step S15.

  The initial setting of the transportation mode flag (the state of the transportation mode flag when the vehicle is produced and shipped at the factory) only needs to be set to ON. That is, a specific scene where the processing of step S13 to step S15 performed by the mode selection unit 31 is described is as follows.

  For example, the transport mode flag is set to ON when the vehicle is produced at a factory, completed and shipped. This can indicate that the vehicle is in transit. Then, for example, when the shipped vehicle is transported to a dealer, etc., and the fuel is injected into the vehicle for delivery to the customer at the dealer, the transportation mode flag is set to OFF. . This can indicate that the transport has been completed.

  Returning to the description of FIG. 2, in step S <b> 16, the mode selection unit 31 determines whether or not the IG of the vehicle is turned off. If it is determined that the IG has been turned off (YES), the processing in the flowchart ends. On the other hand, when the mode selection unit 31 determines that the IG of the vehicle is not turned off (NO), the mode selection unit 31 returns the process to step S12.

  The above is an example of the processing flow of the mode selection unit 31 of the power supply control device according to the present embodiment. Next, an example of the processing flow of the open / close control means 32 of the power control device according to this embodiment (right side in FIG. 2) will be described.

  In step S21, the opening / closing control means 32 determines whether or not an ignition switch (hereinafter simply referred to as IG) of the vehicle is turned off. If the opening / closing control means 32 determines that the IG of the vehicle has been turned off (YES), the process proceeds to the next step S22. On the other hand, when the opening / closing control means 32 determines that the IG of the vehicle is not turned off (NO), the process returns to step S21. That is, the opening / closing control means 32 can proceed to the next process when the IG of the vehicle is turned off.

  In the state where the IG of the vehicle is ON, the power supply 1 and the devices A51, B52, and C53 are not shut off by the shut-off device 2, and the power from the power source 1 is passed through the shut-off device 2 to the device A51. , Device B52 and device C53.

  In step S22, the opening / closing control means 32 starts, for example, a timer provided in the opening / closing control means 32, and starts counting time / days. Then, the open / close control means 32 advances the processing to the next step S23.

  In step S23, the opening / closing control means 32 acquires the flag information output from the mode selection means 21, and proceeds to the next step S24.

  In step S24, the opening / closing control means 32 refers to the flag information acquired in step S23, and determines whether or not the flag is ON, that is, whether or not the vehicle is being transported. If the determination in step S24 is affirmative (YES), that is, if the vehicle is being transported, the process proceeds to the next step S25. On the other hand, when the opening / closing control means 32 refers to the flag information acquired in step S23 and denies the determination in step S24 (NO), that is, when it is not in transit, the process proceeds to the next step S26. Proceed.

  In step S25, the opening / closing control means 32 determines whether or not the time t has elapsed since the start of the time counting in step S22, more specifically, whether or not the time t has elapsed since the IG was turned off. Determine whether. When the time t has elapsed since the IG was turned OFF, the opening / closing control means 32 instructs the shut-off device 2 in the next step S27, and the power from the power source 1 to the devices A51, B52, and C53. Shut off the supply. Thereafter, the opening / closing control means 32 ends the processing in the flowchart.

  Note that the time t in step S25 may be set to about 1 hour. Here, the determination in step S24 is affirmative, that is, it is determined that the vehicle is being transported. For example, a specific scene in which the supply of power to the devices A51, B52, and C53 is interrupted after one hour has elapsed will be described. It becomes as follows.

  For example, the value of the threshold value L is set as the amount of fuel injected when delivering to the customer or the amount of fuel injected when the customer purchases the vehicle and actually uses the vehicle. In general, the vehicle displayed at a dealer is assumed to be a test ride by a customer who visits the dealer, and it is not intended for actual use such as long-distance driving. There are few. For this reason, the vehicle displayed at the store or the like is not being transported, but is determined to be in the transport mode (the transport mode flag is not turned OFF). In this way, for example, in order to test-drive the vehicle on display, the customer who visits the dealer sees the function of the vehicle indefinitely, and then cuts off the power supply in a relatively short time. be able to.

  On the other hand, when the opening / closing control means 32 refers to the flag information acquired in step S23 and denies the determination in step S24 (NO), that is, when it is not in transit, in step S26, the step S22 It is determined whether or not the number of days d has elapsed since the day count was started. The opening / closing control means 32 starts counting the number of days in step S22. More specifically, when the number of days d has elapsed since the IG was turned off, The power supply 1 cuts off the supply of power from the power source 1 to the devices A51, B52, and C53. Thereafter, the opening / closing control means 32 ends the processing in the flowchart.

  Note that the number of days d in step S25 may be set to about 30 days. Here, the determination in step S24 is negative (NO), that is, it is determined that the vehicle is not being transported. For example, a specific scene where the supply of power to the devices A51, B52, and C53 is interrupted after 30 days have elapsed. Is explained as follows.

  As described above, for example, the amount of fuel injected when the vehicle is delivered to the customer with the threshold L value, or the fuel injected when the customer purchases the vehicle and actually uses the vehicle If the amount is set, the transport mode flag is turned off. In this case, for example, when the customer does not use the vehicle for a long time, the supply of power to the devices B52 and C53 is interrupted.

  As described above, according to the present embodiment, for example, when a customer takes a test ride at a store or the like, the functions of the vehicle can be viewed without limit, and thereafter (after the test ride is completed), the device A51, the device Since the supply of power to B52 and the device C53 is cut off, it is possible to prevent a decrease in capacity or deterioration of the power source 1 or a so-called battery rise. On the other hand, after the customer purchases the vehicle, the power supply to the devices A51, B52, and C53 is cut off when the vehicle is not used for a long period of time. , So-called battery run-up can be prevented. That is, according to the power supply control device according to the present embodiment, it is possible to control the standby current according to the usage state of the vehicle.

  The aspect demonstrated by the said embodiment shows a specific example only, and does not limit the technical scope of this invention at all. Therefore, any configuration can be adopted within a range where the effect of the present application is achieved.

  The power supply control device according to the present invention is useful for, for example, a power supply control device mounted on a vehicle, which can control a standby current according to the use state of the vehicle.

DESCRIPTION OF SYMBOLS 1 ... Power supply 2 ... Shut-off device 3 ... Control ECU
31 ... Mode selection means 32 ... Release means 4 ... Fuel level measuring device 51 ... Device A
52 ... Device B
53 ... Device C

Claims (1)

A power supply control device capable of controlling a standby current to a device mounted on a vehicle,
A battery mounted on the vehicle;
Fuel measuring means for measuring the remaining amount of fuel in the vehicle;
A shut-off means for shutting off a standby current from the battery to the device after a first shut-off time has elapsed since the vehicle was turned off;
Changing means for changing the first cutoff time to a second cutoff time longer than the first cutoff time when the remaining amount of the fuel measured by the fuel measuring means exceeds a predetermined value. A power supply control device comprising:

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