Power supply control apparatus and battery unit

Patent metadata

Field	Value
Publication number	US-11273777-B2
Application number	US-201916730286-A
Country	US
Kind code	B2
Filing date	Dec 30, 2019
Priority date	Jun 30, 2017
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A power supply control apparatus is applied to a power supply system. The power supply system includes: a first storage battery and a second storage battery that are connected in parallel to a power generator; and a switch that is provided further towards the first storage battery side than a connection point with the power generator on an electrical path that connects the first storage battery and the second storage battery is. A power supply control apparatus is started in accompaniment with input of a startup signal from outside and controls open and closed states of the switch. The power supply control apparatus includes: an abnormality determining unit that determines whether a startup signal abnormality in which the startup signal has not been received by the power supply control apparatus in a normal manner has occurred; and an abnormality operating unit that operates the switch to a closed state when the startup signal abnormality is determined to have occurred.

First claim

What is claimed is:

1. A power supply control apparatus for a power supply system, the power supply system including a first storage battery and a second storage battery that are connected in parallel to a power generator, and a switch on an electrical path that connects the first storage battery and the second storage battery, the switch being between the first storage battery and a connection point on the electrical path to which the power generator is connected, wherein the power supply control apparatus is configured to be started by input of a startup signal from outside the power supply control apparatus and control open and closed states of the switch, wherein the power supply control apparatus is configured to communicate with an other control apparatus via a communication line, the other control apparatus configured to be started by the startup signal, the power supply control apparatus comprising:
a processor configured to:
determine occurrence of a startup signal abnormality due to the startup signal not being received by the power supply control apparatus in a normal manner;
determine if the processor is in communication with the other control apparatus if the startup signal abnormality occurs; and
operate the switch to a closed state in response to a determination (1) of the occurrence of the startup signal abnormality and (2) communication between the processor and the other control apparatus.

2. The power supply control apparatus according to claim 1 , wherein:
the power supply control apparatus is applied to an in-vehicle power supply system that is mounted in a vehicle and in which communication via the communication line is performed in accompaniment with a power supply switch of the vehicle being turned on and the startup signal is supplied to the power supply control apparatus in accompaniment with the power supply switch being turned on; and
after the processor determines that the startup signal abnormality has occurred, the processor sets the switch to the closed state as a result of communication with the other control apparatus being performed and sets the switch to an open state as a result of communication with the other control apparatus not being performed.

3. The power supply control apparatus according to claim 2 , wherein:
the processor is configured to determine that input of the startup signal has returned to normal based on the startup signal being received by the power supply control apparatus in a state in which communication with the other control apparatus is not being performed after the startup signal abnormality is determined to have occurred.

4. The power supply control apparatus according to claim 3 , wherein:
the processor is configured to determine that input of the startup signal has returned to normal based on an amount of time within which input of the startup signal is continued being equal to or greater than a predetermined amount of time, in response to the startup signal being subsequently received by the power supply control apparatus after the startup signal abnormality is determined to have occurred.

5. The power supply control apparatus according to claim 4 , wherein:
the startup signal is provided as a plurality of startup signals respectively received by the power supply control apparatus from a plurality of routes; and
the processor is configured to determine that the startup signal abnormality has occurred in response to input of at least a portion of the startup signals being stopped.

6. The power supply control apparatus according to claim 5 , wherein:
the power supply control apparatus is applied to the power supply system that includes the switch as a first switch, and a second switch that is provided between the second storage battery and the connection point on the electrical path; and
the processor is configured to operate the first switch to the closed state and the second switch to the open state in response to the startup signal abnormality being determined to have occurred.

7. The power supply control apparatus according to claim 1 , wherein:
the power supply control apparatus is applied to an in-vehicle power supply system that is mounted in a vehicle and in which communication via the communication line is performed in accompaniment with a power supply switch of the vehicle being turned on and the startup signal is supplied to the power supply control apparatus in accompaniment with the power supply switch being turned on; and
the processor is configured to determine that input of the startup signal has returned to normal based on the startup signal being received by the power supply control apparatus in a state in which communication with the other control apparatus is not being performed after the startup signal abnormality is determined to have occurred.

8. The power supply control apparatus according to claim 1 , wherein:
the processor is configured to determine that input of the startup signal has returned to normal based on an amount of time within which input of the startup signal is continued being equal to or greater than a predetermined amount of time, in response to the startup signal being subsequently received by the power supply control apparatus after the startup signal abnormality is determined to have occurred.

9. The power supply control apparatus according to claim 1 , wherein:
the startup signal is provided as a plurality of startup signals respectively received by the power supply control apparatus from a plurality of routes; and
the processor is configured to determine that the startup signal abnormality has occurred in response to input of at least a portion of the startup signals being stopped.

10. The power supply control apparatus according to claim 1 , wherein:
the power supply control apparatus is applied to the power supply system that includes the switch as a first switch, and a second switch that is provided between the second storage battery and the connection point on the electrical path; and
the processor is configured to operate the first switch to the closed state and the second switch to the open state in response to the startup signal abnormality being determined to have occurred.

11. A battery unit comprising:
a power supply control apparatus that is applied to a power supply system, the power supply system including: a first storage battery and a second storage battery that are connected in parallel to a power generator; and a switch on an electrical path that connects the first storage battery and the second storage battery, the switch being between the first storage battery and a connection point on the electrical path to which the power generator is connected, wherein the power supply control apparatus is started by input of a startup signal from outside the power supply control apparatus and controls open and closed states of the switch, wherein the power supply control apparatus is configured to communicate with an other control apparatus via a communication line, the other control apparatus configured to be started by the startup signal, the power supply control apparatus comprising
a processor configured to:
determine whether a startup signal abnormality due to the startup signal not being received by the power supply control apparatus in a normal manner has occurred;
determine if the processor is in communication with the other control apparatus; and
operate the switch to a closed state in response to the startup signal abnormality being determined to have occurred and a determination that the processor is in communication with the other control apparatus;

a first terminal that is connected to the first storage battery;
a second terminal that is co

Assignees

• Denso Corp

Inventors

• Takahashi Shin
• Utsunomiya Yamato

Classifications

• H02J2105/30

  the load networks being external to vehicles, i.e. exchanging power with vehicles · CPC title

• H02J7/663

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H02J9/061

  for DC powered loads · CPC title

• B60R16/033 Primary

  characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) · CPC title

• H02J7/1423

  with multiple batteries · CPC title