Stationary charging system

• US 9,007,022 B2
• Filed: 10/01/2012
• Issued: 04/14/2015
• Est. Priority Date: 10/11/2011
• Status: Active Grant

• Current Assignee: Nichicon Corporation
• Original Assignee: Nichicon Corporation
• Inventors: Ohkuma, Shigeo, Mitsuya, Takamasa, Tachizaki, Shinsuke
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US14/114,789
• Publication Number:
  US 20140062403A1
• Time in Patent Office: 925 Days
• Field of Search: 320/109
• US Class Current: 320/109
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2260/165 of converters
• CPC Class Codes: B60L 3/00 Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption methods or circuit arrangements for monitoring or controlling batteries or fuel cells B60L58/00
• 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 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• CPC Class Codes: H02J 1/102 being switching converters H02J1/108, H02J1/12 take precedence
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• 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: 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
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/12 : Remote or cooperative charging

Abstract

A stationary charging system that is capable of battery charging even when a charging unit has a fault is mounted in a vehicle and includes a power unit for generating direct-current charging power, a plurality of charging units (CHG1 to CHG9) that constitute the power unit, a control unit (MCU), and a first CAN communication line for allowing data exchange between the control unit the charging units, the charging units create charging unit status data concerning results of fault diagnosis on themselves, and transmit the data to the control unit, and the control unit classifies the charging units into a plurality of charging unit groups 4-1, 4-2, and 4-3, and changes output statuses of the charging units for each of the charging unit groups upon reception of charging unit status data indicative of a fault.

Claims

1. A stationary charging system for charging a battery mounted in a vehicle with direct-current charging power generated from alternating-current input power, comprising:

a power unit for generating the direct-current charging power from the alternating-current input power;

a plurality of charging units that constitute the power unit;

a control unit for controlling the charging units; and

a CAN communication line for allowing data exchange between the control unit and the charging units, wherein,

the direct-current charging power is a sum of output power provided by the charging units,

the charging units conduct fault diagnosis on themselves to create charging unit status data concerning results of the fault diagnosis, and transmit the charging unit status data to the control unit, and

the control unit classifies the charging units into a plurality of charging unit groups, and changes output statuses of the charging units for each of the charging unit groups upon reception of the charging unit status data indicative of a fault.

2. The stationary charging system according to claim 1, wherein,

the alternating-current input power is three-phase alternating-current power, and

the charging unit groups each consist of any three of the charging units to which an arbitrary one of the three phases of the alternating-current power is inputted.

3. The stationary charging system according to claim 1, wherein,

when the charging unit status data indicative of a fault is transmitted, the control unit stops the charging units that constitute the charging unit group including the charging unit diagnosed with the fault, as well as the charging units that constitute the other charging unit groups, thereby stopping battery charging, and

the control unit causes the charging units that constitute the other charging unit groups to perform the subsequent charging.

4. The stationary charging system according to claim 1, wherein, when the charging unit status data indicative of a fault is transmitted, the control unit stops the charging units that constitute the charging unit group including the charging unit diagnosed with the fault, and increases output power of the charging units that constitute the other charging unit groups in order to maintain a rated power value for the direct-current charging power, thereby continuing battery charging.

5. The stationary charging system according to claim 1, wherein, when the charging unit status data indicative of a fault is transmitted, the control unit reduces output power of the charging units that constitute the charging unit group including the charging unit diagnosed with the fault, at the same rate, and increases output power of the charging units that constitute the other charging unit groups in order to maintain a rated power value for the direct-current charging power, thereby continuing battery charging.

6. The stationary charging system according to claim 4, wherein the control unit causes the charging units that constitute the other charging unit groups to perform the subsequent charging at a lower power value than at the rated power value.

7. The stationary charging system according to claim 1, wherein,

the charging unit receives command data transmitted from the control unit and conducts the fault diagnosis, and

the control unit transmits the command data to at least one of the charging unit groups and the rest of the charging unit groups at different times, so that the charging unit status data is received at varying times.