US 12,240,339 B2
Power supply device
Yuuta Kajisawa, Okazaki (JP); Yuji Fujita, Okazaki (JP); Yugo Nagashima, Anjo (JP); Kazuma Hasegawa, Anjo (JP); Takashi Koudai, Okazaki (JP); Masaharu Yamashita, Toyota (JP); Atsushi Satou, Miyoshi (JP); Yosuke Yamashita, Nagoya (JP); Kazuaki Iida, Toyota (JP); Hiroyuki Katayama, Toyota (JP); Shintaro Takayama, Toyota (JP); Toyohiro Hayashi, Kariya (JP); Takeshi Iwana, Kariya (JP); Hayaki Tanabe, Kariya (JP); Nobuyori Nakajima, Kariya (JP); and Hiroki Tomizawa, Kariya (JP)
Assigned to JTEKT CORPORATION, Kariya (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and DENSO CORPORATION, Kariya (JP)
Filed by JTEKT CORPORATION, Kariya (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and DENSO CORPORATION, Kariya (JP)
Filed on Jun. 22, 2023, as Appl. No. 18/339,700.
Claims priority of application No. 2022-101931 (JP), filed on Jun. 24, 2022.
Prior Publication US 2023/0415586 A1, Dec. 28, 2023
Int. Cl. B60L 50/61 (2019.01); B60W 10/08 (2006.01); B60W 10/26 (2006.01)
CPC B60L 50/61 (2019.02) [B60W 10/08 (2013.01); B60W 10/26 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A power supply device comprising a driving control device and an auxiliary control device that are installed in a vehicle,
the vehicle including a main power source, an auxiliary power source, and a supply path,
the auxiliary power source being a power source that stores electricity supplied from the main power source,
the supply path being a path that supplies electricity from the main power source to electronic equipment installed in the vehicle and being configured to be opened and closed according to a state of a start switch of the vehicle, wherein:
the driving control device controls a state of the electronic equipment installed in the vehicle while using either the main power source or the auxiliary power source as a power source;
the auxiliary control device controls a state of the auxiliary power source;
the driving control device is configured to execute a storage process, a permission signal transmission process, and an initial value process, the storage process being a process of storing, in a storage device, a state of the start switch determined based on a signal from an outside of the driving control device, the permission signal transmission process being a process of transmitting a permission signal when the state of the start switch stored in the storage device is an off state, the initial value process being a process of, at start-up of the driving control device, setting an initial value of the state of the start switch stored in the storage device to a value indicating an on state;
the auxiliary control device is configured to execute a permission signal reception process and a stop process, the permission signal reception process being a process of receiving the permission signal, the stop process being a process of putting control of supply of electricity from the auxiliary power source to the driving control device into an off state when the permission signal is received;
the auxiliary control device is configured to execute a voltage transmission process;
the driving control device is configured to execute a voltage reception process and an off determination process;
the voltage transmission process is a process of transmitting a detected value of a voltage of the main power source;
the voltage reception process is a process of receiving the detected value of the voltage of the main power source;
the off determination process is a process of determining that the start switch is in an off state based on the detected value of the voltage of the main power source being equal to or smaller than a threshold value; and
the storage process is a process of storing a determination result of the off determination process.