Charging device of vehicle

Patent metadata

Field	Value
Publication number	US-2019190086-A1
Application number	US-201816210508-A
Country	US
Kind code	A1
Filing date	Dec 5, 2018
Priority date	Dec 14, 2017
Publication date	Jun 20, 2019
Grant date	—

Abstract

A charging device includes: a power storage device including a plurality of assembled batteries connected to an inlet in parallel; a plurality of current sensors each configured to detect current flowing in a corresponding one of the plurality of assembled batteries; a plurality of relays each provided between a corresponding one of the plurality of assembled batteries and a corresponding one of the plurality of current sensors; and an ECU configured to perform offset learning to learn offset values of the plurality of current sensors. When the ECU determines that it is in one of first to fourth states, the ECU is configured to cut off one SMR relay in the plurality of SMR relays, and perform the offset learning for the current sensor corresponding to this SMR relay.

First claim

What is claimed is:

1 . A charging device of a vehicle, the charging device comprising:
a connector connectable to a power supply external to the vehicle; a power storage device including a plurality of assembled batteries connected to the connector in parallel; a plurality of current sensors each configured to detect current flowing in a corresponding one of the plurality of assembled batteries; a plurality of relays each provided between a corresponding one of the plurality of assembled batteries and a corresponding one of the plurality of current sensors; and a controller configured to perform offset learning to learn offset values of the plurality of current sensors, wherein when all of the plurality of relays are in a close state and a magnitude of charging current supplied from the power supply to the power storage device or a magnitude of discharging current supplied from the power storage device to the power supply is smaller than a predetermined value, the controller is configured to bring one or more relays of the plurality of relays into an open state and perform the offset learning for one or more current sensors corresponding to the one or more relays in the open state.

2 . The charging device according to claim 1 , wherein when the magnitude of the charging current or the magnitude of the discharging current is larger than the predetermined value, the controller is configured to maintain all of the plurality of relays to be in the close state Without performing the offset learning.

3 . The charging device according to claim 1 , wherein when there is a relay unable to be brought into the open state, the controllers configured not to perform the offset learning for a current sensor corresponding to the relay unable to be brought into the open state.

Assignees

• Toyota Motor Co Ltd

Inventors

• Aburai Noriaki

Classifications

• H02J7/92

  with prioritisation of loads or sources · CPC title

• B60L2240/549

  Current · CPC title

• B60L53/20

  characterised by converters located in the vehicle · CPC title

• B60L58/21 Primary

  having the same nominal voltage · CPC title

• B60L3/0046

  relating to electric energy storage systems, e.g. batteries or capacitors · CPC title