JP2024000190A - Power supply control device and power supply control method - Google Patents

Abstract

To provide a power supply control device which can shorten the time to resume automatic operation travel, as well as, can restrain durability of components from being deteriorated.SOLUTION: A power supply control device is provided with a controller. The controller performs propriety determination for determining whether or not backup by a backup power supply is possible when starting a vehicle which includes automatic operation travel function. if a position of the vehicle is in an automatic operation travel possible area that allows the automatic operation travel, the controller does not perform the propriety determination.SELECTED DRAWING: Figure 5

Description

The disclosed embodiments relate to a power supply control device and a power supply control method.

For autonomous vehicles equipped with a backup power source, when the vehicle's ignition switch (hereinafter referred to as "IG") is turned on, can autonomous driving and FOP (fail operation) in the event of an abnormality operate normally? Performs backup availability determination. If the automatic driving vehicle determines that the backup is possible based on the backup permission determination, automatic driving is permitted (see, for example, Patent Document 1).

For example, while an autonomous vehicle is driving autonomously in an area where autonomous driving is permitted, such as an expressway, the vehicle may stop at a service area along the way for reasons such as a restroom break. The automatic driving vehicle's IG is turned off once in the service area, and after a break, the IG is turned on and the automatic driving resumes.

In this case, even though the automatic driving vehicle has already determined whether or not backup is possible before the IG is turned off and has determined that the backup is possible, when the IG is turned on after the break, it again determines whether or not the backup is possible.

JP2008-72880A

However, even though the self-driving vehicle has already determined whether or not the backup is possible before the IG is turned off, if the IG is turned on and the backup is determined again, the self-driving vehicle will resume self-driving. It will take longer to do so. Furthermore, if the automatic driving vehicle frequently determines whether or not backup is possible, the durability of parts such as switches that are operated to determine whether or not backup is possible decreases.

One aspect of the embodiment has been made in view of the above, and aims to provide a power supply control device that can shorten the time it takes to restart automatic driving and can suppress deterioration of durability of parts. shall be.

A power supply control device according to one aspect of the embodiment includes a controller. The controller determines whether or not backup using a backup power source is possible when starting up a vehicle having an automatic driving function. The controller does not perform the propriety determination if the position of the vehicle at the time of activation is in an autonomous driving possible region where autonomous driving is permitted.

The power supply control device and the power supply control method according to one aspect of the embodiment have the effect of being able to shorten the time until restarting automatic driving and suppressing deterioration of durability of parts.

FIG. 1 is an explanatory diagram showing a configuration example of a power supply control device according to an embodiment. FIG. 2 is an explanatory diagram showing an example of the operation of the power supply control device according to the embodiment. FIG. 3 is an explanatory diagram showing an example of the operation of the power supply control device according to the embodiment. FIG. 4 is an explanatory diagram showing an example of the operation of the power supply control device according to the embodiment. FIG. 5 is a flowchart illustrating an example of processing executed by the main controller of the power supply control device according to the embodiment.

Hereinafter, embodiments of a power supply control device and a power supply control method will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments described below.

The power supply control device according to the embodiment is installed in an electric vehicle, a hybrid vehicle, or an engine vehicle that runs on an internal combustion engine. The power supply control device according to the embodiment includes a main power supply and a backup power supply, and has an optional function that backs up the main power supply with the backup power supply and implements FOP (fail operation) when a power failure occurs in the main power supply. It may be installed in the device.

[1. Power control device configuration]
FIG. 1 is an explanatory diagram showing a configuration example of a power supply control device according to an embodiment. As shown in FIG. 1, the power supply control device 1 according to the embodiment is connected to a main power supply 10 and an external device 100.

Further, the power supply control device 1 is connected to a first general load 101, a first FOP load 102, a second FOP load 103, a third FOP load 104, and a second general load 105. Further, the power supply control device 1 includes a first system 110 and a second system 120.

The first system 110 supplies power from the main power supply 10 to a first general load 101 , a first FOP load 102 , a second FOP load 103 , a third FOP load 104 , and a second general load 105 . The second system 120 supplies power from a backup power supply 20 (described later) to the first FOP load 102, the second FOP load 103, and the third FOP load 104.

The first general load 101 and the second general load 105 include, for example, a display, an air conditioner, audio, video, various lights, a drive recorder, a security device, a communication device, and various sensors.

The first FOP load 102, the second FOP load 103, and the third FOP load 104 are devices for automatic operation. For example, the first FOP load 102, the second FOP load 103, and the third FOP load 104 include a steering motor, an electric brake device, an in-vehicle camera, a radar, etc. that operate during automatic driving. The first general load 101 , the first FOP load 102 , the second FOP load 103 , the third FOP load 104 , and the second general load 105 are operated by power supplied from the power supply control device 1 .

External device 100 is, for example, an automatic driving control device. The external device 100 is a device that is equipped with a GPS (Global Positioning System) and operates a first FOP load 102, a second FOP load 103, and a third FOP load 104 to control automatic driving of the vehicle.

Main power supply 10 includes a generator 12 and a lead battery (hereinafter referred to as "PbB11") when power supply control device 1 is mounted on an engine vehicle. Note that the battery of the main power source 10 may be any secondary battery other than PbB11.

The generator 12 is, for example, an alternator that converts the kinetic energy of a running vehicle into electricity to generate electricity. The generator 12 charges the PbB 11 and a backup power source 20, which will be described later, using the generated power. Further, the generator 12 supplies power to the first general load 101 , the first FOP load 102 , the second FOP load 103 , the third FOP load 104 , and the second general load 105 .

Main power supply 10 includes a DC/DC converter (hereinafter referred to as "DCDC") and PbB 11 when power supply control device 1 is installed in an electric vehicle or a hybrid vehicle. In this case, the DCDC is connected to a generator and a high-voltage battery whose voltage is higher than that of PbB11, and outputs the reduced voltage of the generator and the high-voltage battery to the first system 110. The generator is, for example, an alternator that converts the kinetic energy of a running vehicle into electricity to generate electricity. A high-voltage battery is, for example, a battery for driving a vehicle installed in an electric vehicle or a hybrid vehicle.

The power supply control device 1 also includes a backup power supply 20, a controller 3, a first general load 101, a first FOP load 102, a second FOP load 103, a third FOP load 104, and a plurality of units that supply power to a second general load 105. and a DCDC22.

Specifically, the power supply control device 1 includes a first connection section 41, a second connection section 42, a third connection section 43, a fourth connection section 44, a fifth connection section 45, a sixth connection section 46, and a seventh connection section. portion 47 , an eighth connection portion 48 , a ninth connection portion 49 , and a tenth connection portion 50 .

The first connection unit 41 is a switch that can connect and disconnect the first system 110 and the second system 120. In addition, the 1st connection part 41 may be DCDC. In this case, the DCDC connects the first system 110 and the second system 120 by operating, and disconnects the first system 110 and the second system 120 by stopping its operation.

The second connection unit 42 is a switch that can connect and disconnect the second system 120 and the first FOP load 102. The third connection unit 43 is a switch that can connect and disconnect the second system 120 and the second FOP load 103. The fourth connection unit 44 is a switch that can connect and disconnect the second system 120 and the third FOP load 104.

The fifth connection unit 45 is a switch that can connect and disconnect the backup power supply 20 and the second system 120. The DCDC 22 is connected to the second system 120 so as to be connected in parallel to the fifth connection section 45 . The sixth connection unit 46 is a switch that can connect and disconnect the first system 110 and the first general load 101. The seventh connection unit 47 is a switch that can connect and disconnect the first system 110 and the first FOP load 102. The eighth connection unit 48 is a switch that can connect and disconnect the first system 110 and the second FOP load 103. The ninth connection unit 49 is a switch that can connect and disconnect the first system 110 and the second general load 105. The tenth connection unit 50 is a switch that can connect and disconnect the first system 110 and the third FOP load 104.

The backup power supply 20 is a backup power supply when the main power supply 10 is no longer able to supply power. The backup power source 20 includes a lithium ion battery (hereinafter referred to as "LiB21"). Note that the battery of the backup power source 20 may be any secondary battery other than the LiB 21.

Further, the power supply control device 1 includes a first voltage sensor 51 and a second voltage sensor 52. The first voltage sensor 51 is provided in the first system 110, detects the voltage of the first system 110, and outputs the detection result to the controller 3. The second voltage sensor 52 is provided in the second system 120, detects the voltage of the second system 120, and outputs the detection result to the controller 3.

The controller 3 includes a microcomputer (hereinafter referred to as a "microcomputer") having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and various circuits. Note that part or all of the functions of the controller 3 may be configured by hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

The controller 3 controls the operations of the first to tenth connection sections 41 to 50 and the DCDC 22 by causing the CPU to execute a program stored in the ROM using the RAM as a work area.

[2. Operation example of power supply control device]
Next, an example of the operation of the power supply control device 1 will be described with reference to FIGS. 2 to 4. 2 to 4 are explanatory diagrams showing operational examples of the power supply control device 1 according to the embodiment.

[2.1. Normal operation]
The controller 3 operates as shown in FIG. 2 during normal stop, manual operation, or automatic operation when no ground fault has occurred in the first system 110 and the second system 120 with the IG turned on. to control multiple connections.

Specifically, the controller 3 turns on the first to fourth, sixth to tenth connection parts 41 to 44, and 46 to 50, and turns off the fifth connection part 45. Thereby, the power supply control device 1 can supply power from the main power supply 10 to the first to second general loads 101, 105 and the first to third FOP loads 102 to 104.

[2.2. Power supply control device operation when ground fault occurs]
For example, as shown in FIG. 3, in the power supply control device 1, when a ground fault 200 occurs in the first system 110, an overcurrent flows toward the ground fault point, so the voltage detected by the first voltage sensor 51 increases. becomes below the ground fault threshold.

Therefore, when the voltage detected by the first voltage sensor 51 continues to be below the ground fault threshold for a predetermined period of time, the controller 3 detects the ground fault 200 in the first system 110 and is turned off, the fifth connection section 45 is turned on, and the sixth to tenth connection sections 46 to 50 are turned off.

Thereby, even if the ground fault 200 occurs in the first system 110, the power supply control device 1 can perform FOP control to supply power from the backup power supply 20 to the first to third FOP loads 102 to 104.

Thereafter, the controller 3 notifies the external device 100 that a ground fault 200 has occurred in the first system 110 and that control has shifted to FOP control. Thereby, the external device 100 can operate the first to third FOP loads 102 to 104 using the power supplied from the backup power source 20, and make the vehicle retreat to a safe location and stop.

[2.3. Operation when charging]
The controller 3 charges the backup power source 20 when the amount of electricity stored in the LiB 21 decreases. As shown in FIG. 4, the controller 3 acquires the SOC of the LiB 21 from the backup power supply 20 via the SOC (State of Charge) acquisition line 23, and when the SOC of the LiB 21 decreases to 65% or less, the controller 3 activates the DCDC 22. Perform step-down operation. Then, the controller 3 charges the backup power source 20 by supplying power from the main power source 10 to the backup power source 20 via the first connection section 41 and the DCDC 22 .

[3. Backup availability determination]
At startup when the IG is turned on, the power supply control device 1 determines whether backup is possible or not to determine whether automatic driving and FOP can operate normally when an abnormality occurs, and if it is determined to be possible, permits automatic driving. .

For example, while an autonomous vehicle is driving autonomously in an area where autonomous driving is permitted, such as an expressway, the vehicle may stop at a service area along the way for reasons such as a restroom break. In this case, the automatic driving vehicle's IG is once turned off in the service area, and after a break, the IG is turned on and the automatic driving resumes.

In this case, the parking time of the vehicle is often very short, but the power supply control device 1 has already determined whether or not backup is possible before the IG is turned off, and only a short time has passed since then. Even if it is not, if the IG is turned on, the backup possibility is determined again. This situation also occurs when the vehicle stops at a location other than the home, such as a convenience store or gas station.

However, even though the power supply control device 1 has already performed the backup feasibility determination and determined that the backup is possible before the IG is turned off, if the IG is turned on and the backup capability determination is performed again, the power supply control device 1 stops automatic driving. It will take longer to restart. Furthermore, if the automatic driving vehicle frequently determines whether or not backup is possible, the durability of parts such as switches that are operated to determine whether or not backup is possible decreases.

Therefore, the power supply control device 1 according to the embodiment includes a controller 3. The controller 3 determines whether or not backup by the backup power supply 20 is possible (hereinafter referred to as "backup availability determination") when starting up the vehicle having the automatic driving function. If the position of the vehicle at the time of startup is in an autonomous driving possible region where automatic driving is permitted, the controller 3 does not perform backup permission determination, that is, prohibits backup permission determination.

For example, the controller 3 determines whether the vehicle is located on an expressway, a motorway, a road with a width of a predetermined width or more, on which autonomous driving is permitted in advance, or within an area such as a service area, an evacuation area, or a safety zone. , the backup availability determination is not performed or a part of it is omitted.

In other words, not performing backup availability determination in this embodiment means not performing determination on all items for backup availability determination, but also performing determination on some items such as SOC determination, which will be described later, and performing determination on the remaining items. This includes not making a determination.

In addition, when the vehicle is parked at a place other than the home, for example, at a place where the parking time is short, such as a convenience store or a gas station, the controller 3 does not perform the determination of whether or not backup is possible, or performs a part of the determination. It may be configured to be omitted.

Thereby, the power supply control device 1 can resume automatic driving immediately, for example, when the IG is turned on. Furthermore, since the power supply control device 1 does not perform unnecessary backup determination, the durability of parts used for backup determination is improved. For example, the power supply control device 1 can improve the durability of the first to tenth connection parts 41 to 50.

Specifically, the controller 3 does not perform the feasibility determination when the elapsed time from when the IG is turned off until it is turned on is within the first threshold time. The first predetermined time is, for example, one hour. Note that the first predetermined time may be a time other than one hour, as long as it is expected that the backup-enabled state will not change.

In this case, when the IG is turned on, if the controller 3 determines that the backup is possible in the previous judgment, then the elapsed time is less than one hour, and the state in which the backup is possible may have changed. Since the probability is low, it can be more reliably estimated that no judgment is necessary.

Moreover, the controller 3 does not perform the propriety determination when the elapsed time from the end of the automatic driving until the IG is turned on is within the second threshold time. The second predetermined time is, for example, 1 hour and 15 minutes. Note that the second predetermined time may be a time other than 1 hour and 15 minutes, as long as it is expected that the backup-enabled state will not change.

In this case, when the IG is turned on, the power supply control device 1 determines that if the previous backup determination is yes, then the elapsed time is within 1 hour and 15 minutes, and the backup possible state has changed. Since there is a low possibility that the

Further, the backup availability determination includes a first determination (hereinafter sometimes referred to as "backup availability determination (a)") for determining a failure of a switch for performing backup. The controller 3 does not make the first determination.

For example, when the IG is turned on, the controller 3 sequentially controls on/off the first to tenth connection parts 41 to 50 and reads the voltage values of the first voltage sensor 51 and the second voltage sensor 52. A first determination is performed to determine whether the first to tenth connection portions 41 to 50 are stuck in the on state or stuck in the off state. Then, the controller 3 does not perform the first determination if the position of the vehicle at the time of startup is in the autonomous driving possible region. Thereby, the power supply control device 1 can improve the durability of the first to tenth connection parts 41 to 50 by reducing the number of operations of the first to tenth connection parts 41 to 50.

Further, the backup availability determination includes a second determination (hereinafter sometimes referred to as "backup availability determination (b)") that determines deterioration of the backup power supply 20 by charging and discharging the backup power supply 20. The controller 3 does not make the second determination.

For example, when the IG is turned on, the controller 3 controls the first to tenth connection parts 41 to 50 and DCDC 22 and charges or discharges LiB 21 so that the internal resistance of LiB 21 becomes the state shown in FIG. is measured, and a second determination is made based on the measured value. Then, the controller 3 does not perform the second determination if the position of the vehicle at the time of startup is in the autonomous driving possible region. Thereby, the power supply control device 1 can reduce the number of times the backup power supply 20 is charged and discharged unnecessarily, so that deterioration of the backup power supply 20 can be prevented.

Further, the backup availability determination includes a third determination (hereinafter sometimes referred to as "backup availability determination (c)") that determines whether or not power can be supplied from the backup power source 20 to the load for a predetermined period of time. The controller 3 does not make the third determination.

For example, the controller 3 controls the first to tenth connection parts 41 to 50 so as to be in the state shown in FIG. A third determination is made based on whether the voltage of the backup power supply 20 is within the normal range. Then, the controller 3 does not perform the third determination if the position of the vehicle at the time of startup is in the autonomous driving possible region. Thereby, the power supply control device 1 can reduce the number of times of unnecessary power supply from the backup power supply 20, and thus can prevent deterioration of the backup power supply 20.

Further, the backup availability determination includes a fourth determination (hereinafter, sometimes referred to as "backup availability determination (d)") that determines whether the amount of electricity stored in the backup power supply 20 is equal to or greater than a predetermined threshold value. For example, the predetermined threshold value is 80% SOC of LiB21. For example, the controller 3 performs the fourth determination based on the SOC of the LiB 21 obtained from the backup power supply 20. The controller 3 performs the fourth determination even if the position of the vehicle at the time of startup is in the autonomous driving possible region. Thereby, the power supply control device 1 can reliably perform FOP control when performing FOP control after resuming automatic driving. Note that the backup propriety determination may not include the first to third determinations, or may include at least one of the first to third determinations.

[4. Processing executed by the controller]
Next, with reference to FIG. 5, the processing executed by the controller 3 of the power supply control device 1 will be described. FIG. 5 is a flowchart illustrating an example of a process executed by the controller 3 of the power supply control device 1 according to the embodiment.

Note that the control processing executed by the controller 3 during normal operation, operation when a ground fault occurs, and operation during charging has already been explained with reference to FIGS. The details of the determination process will be explained.

When the IG is turned on, the controller 3 acquires the vehicle position from the external device 100 (step S101). Subsequently, the controller 3 determines whether the vehicle position is within the autonomous driving possible region (step S102).

Specifically, in step S102, the controller 3 determines whether the IG is turned on at the stopping place after switching from automatic driving to manual driving or when the stopping place during automatic driving is within the automatic driving possible range. Determine whether or not.

In other words, the controller 3 determines whether the own vehicle position is a position where the vehicle is parked for a relatively short period of time. For this reason, the controller 3 may be configured to determine, in step S102, whether or not the location of the vehicle is at a location other than the home as an AND condition. In this case, if the IG is turned on within the autonomous driving possible region and the vehicle is located outside the home, the answer to step S102 becomes Yes.

When the controller 3 determines that the vehicle position is not within the autonomous driving possible region (step S102, No), the process moves to step S104. When the controller 3 determines that the vehicle position is within the automatic driving possible region (step S102, Yes), the controller 3 turns on the first condition flag (step S103). Note that the first condition flag is off when the IG is turned on.

Subsequently, the controller 3 determines whether the first predetermined time is within the first threshold time (step S104). The first predetermined time is the elapsed time from when the IG is turned off until it is turned on. When the controller 3 determines that the first predetermined time is not within the first threshold time (step S104, No), the process moves to step S106.

When the controller 3 determines that the first predetermined time is within the first threshold time (step S104, Yes), it turns on the second condition flag (step S105). Note that the second condition flag is off when the IG is turned on.

Subsequently, the controller 3 determines whether the second predetermined time is within the second threshold time (step S106). The second predetermined time is the elapsed time from the end of automatic driving until the IG is turned on. When the controller 3 determines that the second predetermined time is not within the second threshold time (step S106, No), the process moves to step S108.

When the controller 3 determines that the second predetermined time is within the second threshold time (step S106, Yes), it turns on the third condition flag (step S107). Note that the third condition flag is off when the IG is turned on.

Subsequently, the controller 3 determines whether the backup availability determination omission condition is satisfied (step S108). For example, the backup availability determination omission condition is that the first condition flag is on. The backup availability determination omission condition may be such that both the first condition flag and the second condition flag are on. The backup availability determination omission condition may be such that all of the first condition flag, the second condition flag, and the third condition flag are on.

When the controller 3 determines that the condition for omitting the backup availability determination is satisfied (step S108, Yes), the process moves to step S110. In other words, the controller 3 moves the process to step S110 without performing backup availability determinations (a), (b), and (c), which will be described later.

When the controller 3 determines that the condition for omitting the backup possibility determination is not satisfied (step S108, No), the controller 3 performs the backup possibility determinations (a), (b), and (c) (step S109). The backup possibility determination (a) is a failure determination of the first to fifth connection sections 41 to 45 for performing backup.

Note that the backup availability determination (a) may further include failure determination of the sixth to eighth connection sections 46 to 48. Further, when the controller 3 determines that the backup availability determination omission condition is not satisfied (step S108, No), the controller 3 may move the process to step S111.

The backup availability determination (b) is a determination of deterioration of the backup power source 20 by charging and discharging the backup power source 20. The backup availability determination (c) is a determination as to whether or not it is possible to supply power from the backup power source 20 to the first to third FOP loads 102 to 104 for a predetermined period of time.

Subsequently, the controller 3 performs backup availability determination (d) (step S110). The backup availability determination (d) is a determination as to whether the amount of electricity stored in the backup power source 20 is equal to or greater than a predetermined threshold value. For example, the backup possibility determination (d) is a determination as to whether the SOC of the LiB 21 is 80% or more.

Subsequently, the controller 3 determines whether automatic driving is permitted (step S111). The controller 3 determines that automatic driving is permitted when all of the backup permission determinations (a), (b), (c), and (d) are determined to be possible.

When the controller 3 determines that automatic driving is permitted (step S111, Yes), the controller 3 turns on the permission flag (step S112). When the controller 3 determines that permission for automatic driving is not possible (step S111, No), the controller 3 turns off the permission flag (step S113). Note that the controller 3 stores the settings of the permission flag in a nonvolatile memory, and notifies the external device 100 of the settings of the permission flag.

After turning the permission flag on or off, the controller 3 determines whether automatic driving has started (step S114). The controller 3 obtains notification from the external device 100 as to whether or not automatic driving has started. When the controller 3 determines that automatic driving has not started (step S114, No), the process moves to step S117.

When the controller 3 determines that the automatic driving has started (step S114, Yes), the controller 3 determines whether the automatic driving has ended (step S115). The controller 3 obtains notification from the external device 100 as to whether or not the automatic driving has been completed. When the controller 3 determines that the automatic driving has not been completed (step S115, No), the controller 3 moves the process to step S117.

When the controller 3 determines that the automatic driving has ended (step S115, Yes), it starts the second timer (step S116). The second timer is a timer that measures a second predetermined time, which is the elapsed time from the end of automatic driving until the IG is turned on.

Subsequently, the controller 3 determines whether the IG is turned off (step S117). The controller 3 is configured to obtain information from the vehicle indicating that the IG has been turned on or off. The controller 3 may be configured to acquire information indicating that the IG is turned on or off from the external device 100.

When the controller 3 determines that the IG is not turned off (step S117, No), the process moves to step S110. When the controller 3 determines that the IG is turned off (step S117, Yes), it starts the first timer (step S118).

The first timer is a timer that measures a first predetermined time that is the elapsed time from when the IG is turned off until it is turned on. After starting the first timer, the controller 3 ends the process.

[5. Note]
As an additional note, the features of the present invention are shown below.
(1)
A power supply control device comprising a controller that determines whether or not backup by a backup power source is possible when starting a vehicle having an automatic driving function,
The controller includes:
If the position of the vehicle at the time of startup is in an autonomous driving possible area where autonomous driving is permitted, the permission determination is not performed;
Power control device.
(2)
The controller includes:
If the elapsed time from when the ignition switch of the vehicle is turned off to when it is turned on is within a first threshold time, the determination is not made.
The power supply control device according to (1) above.
(3)
The controller includes:
not performing the feasibility determination if the elapsed time from the end of automated driving until the ignition switch of the vehicle is turned on is within a second threshold time;
The power supply control device according to (1) or (2) above.
(4)
The said acceptability determination is
a first determination for determining a failure of the switch for performing the backup;
The controller includes:
not performing the first determination;
The power supply control device according to any one of (1) to (3) above.
(5)
The said acceptability determination is
a second determination of determining deterioration of the backup power source by charging and discharging the backup power source;
The controller includes:
not performing the second determination;
The power supply control device according to any one of (1) to (4) above.
(6)
The said acceptability determination is
including a third determination of determining whether power can be supplied from the backup power source to the load for a predetermined time,
The controller includes:
not performing the third determination;
The power supply control device according to any one of (1) to (5) above.
(7)
The said acceptability determination is
including a fourth determination of determining whether the amount of electricity stored in the backup power source is equal to or greater than a predetermined threshold;
The controller includes:
The fourth determination is made even if the position of the vehicle at the time of startup is in an area where autonomous driving is possible;
The power supply control device according to any one of (1) to (6) above.
(8)
When starting up a vehicle with an autonomous driving function, a controller of a power supply control device determines whether or not backup by a backup power source is possible.
If the position of the vehicle at the time of startup is in an area where autonomous driving is possible, the determination of whether or not the vehicle is possible is not performed;
Power control method.

Further advantages and modifications can be easily deduced by those skilled in the art. Therefore, the broader aspects of the invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

1 Power supply control device 10 Main power supply 11 PbB
12 Generator 3 Controller 20 Backup power supply 21 LiB
41 1st connection part 42 2nd connection part 43 3rd connection part 44 4th connection part 45 5th connection part 46 6th connection part 47 7th connection part 48 8th connection part 49 9th connection part 50 10th connection part 51 First voltage sensor 52 Second voltage sensor 100 External device 101 First general load 102 First FOP load 103 Second FOP load 104 Third FOP load 105 Second general load 110 First system 120 Second system 200 Ground fault

Claims (8)

A power supply control device comprising a controller that determines whether or not backup by a backup power source is possible when starting a vehicle having an automatic driving function,
The controller includes:
If the position of the vehicle at the time of startup is in an autonomous driving possible area where autonomous driving is permitted, the permission determination is not performed;
Power control device. The controller includes:
If the elapsed time from when the ignition switch of the vehicle is turned off to when it is turned on is within a first threshold time, the determination is not made.
The power supply control device according to claim 1. The controller includes:
If the elapsed time from the end of automatic driving to when the ignition switch of the vehicle is turned on is within a second threshold time, not performing the feasibility determination;
The power supply control device according to claim 1. The said acceptability determination is
a first determination for determining a failure of the switch for performing the backup;
The controller includes:
not performing the first determination;
The power supply control device according to claim 1. The said acceptability determination is
a second determination of determining deterioration of the backup power source by charging and discharging the backup power source;
The controller includes:
not performing the second determination;
The power supply control device according to claim 1. The said acceptability determination is
including a third determination of determining whether power can be supplied from the backup power source to the load for a predetermined time,
The controller includes:
not performing the third determination;
The power supply control device according to claim 1. The said acceptability determination is
including a fourth determination of determining whether the amount of electricity stored in the backup power source is equal to or greater than a predetermined threshold;
The controller includes:
The fourth determination is made even if the position of the vehicle at the time of startup is in an area where autonomous driving is possible;
The power supply control device according to claim 1. When starting up a vehicle with an autonomous driving function, a controller of a power supply control device determines whether or not backup by a backup power source is possible.
If the position of the vehicle at the time of startup is in an autonomous driving possible area where autonomous driving is permitted, the permission determination is not performed;
Power control method.

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