Charging device

• US 9,487,096 B2
• Filed: 08/02/2013
• Issued: 11/08/2016
• Est. Priority Date: 08/02/2013
• Status: Expired due to Fees

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Dougan, Yoshihiro
• Primary Examiner(s): Rodas, Richard Isla
• Assistant Examiner(s): Sharief, Mohammed J
• Application Number:
  US14/123,831
• Publication Number:
  US 20150217651A1
• Time in Patent Office: 1,194 Days
• Field of Search: 320/109, 320/106
• US Class Current: 1/1
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• 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 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A charging device 2 is a device for charging a battery 30 of a battery-type forklift 1 provided with the battery and at least one motor, the motor driven by the power supplied from the battery. The charging device 2 includes: a power conversion unit 73 that converts an alternating-current power to direct-current power, a control unit 70 that controls charging of the battery 30 based on an instruction from an in-vehicle control device 60 mounted on the battery-type forklift 1, a feed terminal that supplies the direct-current power to the battery 30, a communication terminal for communicating with the battery-type forklift 1, and a startup terminal for transmitting a signal for staring up the in-vehicle control device 60.

Claims

1. A charging device for charging a battery of a work vehicle provided with the battery and at least one motor and a power source device and an in-vehicle control device, the motor being driven by power supplied from the battery, the power source device receiving power from the battery, the in-vehicle control device receiving power from the power source device to control an operation of the motor, the charging device comprising:

a power conversion unit configured to convert alternating-current power to direct-current power;

a control unit configured to control charging of the battery based on an instruction from an in-vehicle control device mounted on the work vehicle;

a feed terminal configured to supply the direct-current power to the battery;

a communication terminal for communicating with the work vehicle;

a startup terminal for transmitting a signal for starting up the in-vehicle control device;

a startup signal generation unit configured to generate a signal for starting up the in-vehicle control device provided in the work vehicle to transmit the signal to the power source device through the startup terminal; and

a charging device power source configured to transform power supplied from the battery of the work vehicle through the feed terminal to supply the transformed power to the control unit,

wherein the control unit is started upon receiving the supplying of the power from the charging device power source, and

wherein the in-vehicle control device starts charging by sending an instruction signal to the control unit upon receiving a startup-completion signal from the control unit.

2. The charging device according to claim 1, wherein the feed terminal, the communication terminal, and the startup terminal are arranged in a same connector.