Title:
電気自動車用の電源システム
Document Type and Number:
Japanese Patent JP6677088
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for a power supply system including two converters, capable of closing a system switch immediately after precharge of a capacitor is completed.SOLUTION: A power supply system 2 includes a main battery 4, a sub-battery 22, a first DDC 28 and a second DDC 30. The first DDC 28 is converter which is connected between a side closer to a PCU 12 from a SMR (System Main Relay) 20 and a sub-power line 24 and can perform step-up and step-down operation. The second DDC 30 is a converter which is connected between a side closer to the main battery 4 from the SMR 20 and the sub-power line 24 and can perform step-down operation. An ECU 60 controls the second DDC 30 so that an output current becomes constant irrespective of a load variation of auxiliary equipment 26, and causes the first DDC 28 to perform step-up operation to charge a capacitor 14. The ECU 60 closes the SMR 20 when a difference between a both end voltage of the capacitor 14 and a battery voltage becomes smaller than an allowable voltage difference.SELECTED DRAWING: Figure 1
Inventors:
Nozawa Takashi
Application Number:
JP2016114947A
Publication Date:
April 08, 2020
Filing Date:
June 09, 2016
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H02M7/48
Domestic Patent References:
| JP2016101057A | ||||
| JP2007135375A |
Attorney, Agent or Firm:
Kaiyu International Patent Office