APPARATUS FOR CONTROLLING ELECTRIC VEHICLE CHARGING SYSTEM

• US 20170305291A1
• Filed: 12/19/2016
• Published: 10/26/2017
• Est. Priority Date: 04/20/2016
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: KOH, Kwang-Soo, KANG, Ho-Hyun
• Granted Patent: US 10,889,190 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0019 using switched or multiplexed charge circuits
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• 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

Abstract

Disclosed herein is an apparatus for controlling an electric vehicle charging system. The apparatus charges each of a plurality of batteries up to a first preset voltage lower than a full charge voltage by voltage control, charges the plurality of batteries up to a predetermined percentage of a second preset voltage that is the full charge voltage by current control, and charges the plurality of batteries up to the second preset voltage by the voltage control.

Claims

1. An apparatus for controlling an electric vehicle charging system, the apparatus comprising:

a battery management system configured to provide information associated with state of charge of a plurality of batteries;

a plurality of magnetic switches each connected to the respective plurality of batteries;

a converter unit configured to convert AC voltage applied from a power system into DC voltage to supply it to the batteries; and

a control unit configured to charge each of the plurality of batteries up to a first preset voltage by voltage control, charge the plurality of batteries up to a percentage of a second preset voltage by current control, and charge the plurality of batteries up to the second preset voltage by the voltage control,

wherein the first voltage is lower than a full charge voltage and the second voltage is the full charge voltage.

2. The apparatus of claim 1, wherein the control unit turns on a first magnetic switch connected to a first battery among the plurality of batteries, and turns off the first magnetic switch when the voltage of the first battery reaches the first preset voltage.

3. The apparatus of claim 2, wherein the control unit turns on the plurality of magnetic switches connected to the plurality of batteries, respectively, if the plurality of batteries is charged up to the first preset voltage.

4. The apparatus of claim 1, wherein the converter unit converts DC voltage supplied from at least one of the plurality of batteries into AC voltage and supplies it to the power system.

5. The apparatus of claim 1, further comprising:

a DC circuit breaker disposed between the plurality of magnetic switches and the converter unit and configured to prevent overcurrent from being introduced to the batteries.

6. The apparatus of claim 1, further comprising:

an AC circuit breaker disposed between the converter unit and the power system and configured to prevent overcurrent from being introduced to the power system.