Electric vehicle

• US 8,487,558 B2
• Filed: 02/29/2012
• Issued: 07/16/2013
• Est. Priority Date: 03/08/2011
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Ogawa, Taichi, Kuribayashi, Tohru, Ohishi, Arata, Agatsuma, Eiji
• Primary Examiner(s): Ro, Bentsu
• Assistant Examiner(s): AGARED, GABRIEL T
• Application Number:
  US13/408,516
• Publication Number:
  US 20120229057A1
• Time in Patent Office: 503 Days
• Field of Search: 318/139, 318/376, 318/801, 320/107, 320/109, 320/110, 320/116
• US Class Current: 318/139
• CPC Class Codes: B60L 2210/12 Buck converters
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2270/20 Inrush current reduction, i.e. avoiding high currents when connecting the battery
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

An electric vehicle may include a main battery, a charging system electronic device, an electrically powered system-based electronic device, a first high-voltage electric wire; and a second high-voltage electric wire. The electrically powered system-based electronic device and the charging system electronic device may be sequentially disposed in parallel. The electric vehicle may further include a first junction relay capable of isolating the first high-voltage electric wire; and a second junction relay capable of isolating the second high-voltage electric wire. The first junction relay is disposed between the main battery and the charging system electronic device, and a first pre-charge relay which bypasses the first junction relay is disposed in parallel with the first junction relay, and the second junction relay is disposed between the charging system electronic device and the electrically powered system-based electronic device.

Claims

1. An electric vehicle comprising:

a main battery;

a charging system electronic device configured to charge a vehicle-mounted electric power supply that includes the main battery;

an electrically powered system-based electronic device including an inverter configured to convert direct-current power of the main battery into alternating-current power, thereby driving a motor for travelling;

a first high-voltage electric wire that connects the charging system electronic device and the electrically powered system-based electronic device to any one of the positive electrode side and the negative electrode side of the main battery; and

a second high-voltage electric wire that connects the charging system electronic device and the electrically powered system-based electronic device to the other one of the positive electrode side and the negative electrode side of the main battery,

characterized by

the electrically powered system-based electronic device and the charging system electronic device are sequentially disposed in parallel,

the electric vehicle further comprises;

a first junction relay capable of isolating the first high-voltage electric wire; and

a second junction relay capable of isolating the second high-voltage electric wire,

the first junction relay is disposed between the main battery and the charging system electronic device, and

a first pre-charge relay that bypasses the first junction relay is disposed in parallel with the first junction relay, and the second junction relay is disposed between the charging system electronic device and the electrically powered system-based electronic device.

2. The electric vehicle according to claim 1, wherein

when performing charging using the charging system electronic device, starting from a state where all of the first pre-charge relay, the first junction relay, and the second junction relay are opened, the first pre-charge relay is made to be in a closed state while maintaining the opened state of the second junction relay, and thereafter, the first junction relay is switched to a closed state, and

when starting up the electrically powered system-based electronic device, starting from a state where the first pre-charge relay, the first junction relay, and the second junction relay are opened, the second junction relay is switched to a closed state, while the first pre-charge relay is made to be in a closed state and thereafter, the first junction relay is switched to a closed state.

3. The electric vehicle according to claim 1, wherein a second pre-charge relay that bypasses the second junction relay is disposed in parallel with the second junction relay.

4. The electric vehicle according to claim 3, wherein

when performing charging using the charging system electronic device, starting from a state where the first pre-charge relay, the first junction relay, and the second junction relay are opened, the first pre-charge relay is made to be in a closed state while maintaining the opened state of the second junction relay, and thereafter, the first junction relay is switched to a closed state, and

when starting up the electrically powered system-based electronic device, starting from a state where the first pre-charge relay, the second pre-charge relay, the first junction relay, and the second junction relay are opened, the second pre-charge relay is made to be in a closed state, and then the second junction relay is switched to a closed state, and then each potential of smoothing capacitors that are provided in the charging system electronic device and the electrically powered system-based electronic device is raised to a given potential, and then the first pre-charge relay is made to be in a closed state, and thereafter, the first junction relay is switched to a closed state.