Portable charger device, contactless charger system for electric work vehicle and electric grass mower machine

• US 10,538,166 B2
• Filed: 12/14/2016
• Issued: 01/21/2020
• Est. Priority Date: 03/29/2016
• Status: Active Grant

• Current Assignee: Kubota Corporation
• Original Assignee: Kubota Corporation
• Inventors: Ito, Hirokazu, Manji, Yasuhiro, Matsuda, Kazuaki
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Piggush, Aaron
• Application Number:
  US15/378,868
• Publication Number:
  US 20170282733A1
• Time in Patent Office: 1,133 Days
• Field of Search: 320101, 320103, 320104, 320108
• CPC Class Codes: B60L 2200/40 Working vehicles
• CPC Class Codes: B60L 2220/42 with use of more than one motor
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/51 Photovoltaic means
• CPC Class Codes: B60L 53/53 Batteries
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A portable charger device 200 includes a charger device side battery 3, a first charging control section 31 for non-quick charging of the charger device side battery 3 by power supply from an external power source 8, and a second charging control section 32 for quick charging of a vehicle side battery 4 mounted on an electric vehicle 100 by power supply from the charger device side battery 3.

Claims

1. A portable charger device for charging a vehicle side battery mounted on an electric vehicle, device comprising:

a charger device side battery;

a first charging control section configured to perform non-quick charging of the charger device side battery by power supply from an external power source; and

a second charging control section electrically separated from the first charging control section by a battery control section for the charger device side battery, the second charging control section being configured to perform quick charging of the vehicle side battery by power supply from the charger device side battery,

wherein the second charging control section includes a converter configured to convert a voltage supplied by the charger device side battery to a higher voltage for quick charging the vehicle side battery, and

wherein the higher voltage for quick charging the vehicle side battery is greater than a voltage provided by the first charging control section for non-quick charging the charger device side battery.

2. The portable charger device according to claim 1, wherein the portable charger device includes a wheeled frame.

3. The portable charger device according to claim 2, wherein the wheeled frame comprises a towed vehicle body that can be towed by the electric vehicle.

4. The portable charter device according to claim 1, wherein there are provided a solar cell unit and a third charging control section for charging the charger device side battery by power supply from the solar cell unit.

5. The portable charger device according to claim 1, wherein the first charging control section employs a commercial AC power source as the external power source.

6. The portable charger device according to claim 1, wherein the first charging control section employs a car 12V battery as the external power source.