Title:
VEHICLE CHARGING DEVICE, VEHICLE CHARGING CONTROL METHOD, AND VEHICLE CHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/234234
Kind Code:
A1
Abstract:
The present invention relates to a vehicle charging device, a vehicle charging control method, and a vehicle charging system. According to one aspect of the present invention, a charging circuit is provided, the charging circuit being connected to a vehicle drive battery in the order of a DC/DC converter of which the input side is connected to an external power supply via a first switch and the output side is connected to an auxiliary battery, and a second switch. When the voltage of the auxiliary battery decreases, the second switch is open and the charging circuit is activated to start charging of the auxiliary battery, and then the second switch is closed and charging of the vehicle drive battery is started. Thereby, it is possible to stably charge the vehicle drive battery even when the voltage of the auxiliary battery is low, while ensuring charging safety.
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Inventors:
SATO AKIHIRO (JP)
Application Number:
PCT/JP2023/019842
Publication Date:
December 07, 2023
Filing Date:
May 29, 2023
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02J7/02; B60L53/14; B60L53/30; H02J7/00; H02J7/04
Foreign References:
| JP2011205840A | 2011-10-13 | |||
| JP2009225587A | 2009-10-01 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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