SWITCHING DEVICE, AND SOLAR POWER GENERATION SYSTEM AND VEHICLE DRIVING SYSTEM USING THE SAME

• US 20130162023A1
• Filed: 02/19/2013
• Published: 06/27/2013
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: WATANABE, Keisuke
• Granted Patent: US 9,479,158 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 50/60 using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60L 8/003 Converting light into electric energy, e.g. by using photo-voltaic systems
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H03K 17/122 in field-effect transistor switches
• CPC Class Codes: H03K 17/687 the devices being field-effect transistors
• CPC Class Codes: H03K 17/6874 in a symmetrical configuration
• CPC Class Codes: H03K 2217/0036 Means reducing energy consumption
• CPC Class Codes: H03K 2217/0054 Gating switches, e.g. pass gates
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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: Y04S 10/126 the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

A series-parallel switch circuit is constituted by connecting, in parallel, multiple series switch circuits in which a first switch receiving electric current and a second switch outputting the electric current are connected in series. Middle points of the multiple series switch circuits are joined. When the series-parallel switch circuit is turned on, the second switches constituting the series-parallel switch circuit are turned on, and thereafter, the first switches constituting the series-parallel switch circuit are turned on.

Claims

1. A switching device comprising a plurality of series switch circuits in which a first switch receiving electric current and a second switch outputting the electric current are connected in series, wherein

a series-parallel switch circuit is constituted by connecting the series switch circuits in parallel,

middle points of the series switch circuits are joined, and

when the series-parallel switch circuit is turned on, the second switches constituting the series-parallel switch circuit are turned on, and thereafter, the first switches constituting the series-parallel switch circuit are turned on.

3. The switching device according to claim 1, wherein

when the series-parallel switch circuit is turned off, the first switches constituting the series-parallel switch circuit are turned off, and thereafter, the second switches constituting the series-parallel switch circuit are turned off.

4. The switching device according to claim 3 further comprising a control unit for controlling ON/OFF of the first switches and the second switches, wherein

a maximum rated electric current of at least one of the first switches is set at a level higher than a maximum rated electric current of the remaining first switches and the second switches,

when the series-parallel switch circuit is turned on, the control unit turns on the second switches, thereafter turns on a first switch of which maximum rated electric current is high, and thereafter, turns on the remaining first switches, and

when the series-parallel switch circuit is turned off, the control unit turns off the remaining first switches, thereafter turns off a first switch of which maximum rated electric current is high, and thereafter, turns off the second switches.

5. The switching device according to claim 4, wherein

the first switch of which maximum rated electric current is high is constituted by a transistor having a trench structure, and the remaining first switches and the second switches are constituted by a transistor having a planar structure, and

the series-parallel switch circuit is made into a module an integrated manner.

6. The switching device according to claim 1, wherein

the first switches and the second switches are constituted by MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor), and

the first switch and the second switch are connected in series such that directions of body diodes formed in the MOSFETs are different from each other.

9. A solar power generation system comprising:

a storage battery;

a solar power generation module;

a DC-DC converter for performing DC-DC conversion of an output electric power of the solar power generation module and a discharge electric power of the storage battery;

a power conditioner for performing DC-AC conversion of an output electric power of the DC-DC converter; and

the switching device according to claim 1 connected between the storage battery and the DC-DC converter.

11. A vehicle driving system comprising:

a storage battery;

a AC-DC converter for performing AC-DC conversion of an alternating current electric power from a commercial system;

a DC-DC converter for performing DC-DC conversion of a discharge electric power of the storage battery and an output electric power of the AC-DC converter;

an inverter for receiving an output electric power of the DC-DC converter and driving a motor; and

the switching device according to claim 1 connected between the storage battery and the DC-DC converter.

2. A switching device comprising a plurality of series switch circuits in which a first switch receiving electric current and a second switch outputting the electric current are connected in series, wherein

a series-parallel switch circuit is constituted by connecting the series switch circuits in parallel,

middle points of the series switch circuits are joined, and

when the series-parallel switch circuit is turned off, the first switches constituting the series-parallel switch circuit are turned off, and thereafter, the second switches constituting the series-parallel switch circuit are turned off.

7. The switching device according to claim 2, wherein

the first switches and the second switches are constituted by MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor), and

the first switch and the second switch are connected in series such that directions of body diodes formed in the MOSFETs are different from each other.

10. A solar power generation system comprising:

a storage battery;

a solar power generation module;

a DC-DC converter for performing DC-DC conversion of an output electric power of the solar power generation module and a discharge electric power of the storage battery;

a power conditioner for performing DC-AC conversion of an output electric power of the DC-DC converter; and

the switching device according to claim 2 connected between the storage battery and the DC-DC converter.

12. A vehicle driving system comprising:

a storage battery;

a AC-DC converter for performing AC-DC conversion of an alternating current electric power from a commercial system;

a DC-DC converter for performing DC-DC conversion of a discharge electric power of the storage battery and an output electric power of the AC-DC converter;

an inverter for receiving an output electric power of the DC-DC converter and driving a motor; and

the switching device according to claim 2 connected between the storage battery and the DC-DC converter.

8. A switching device comprising a plurality of series switch circuits in which a first switch receiving electric current and a second switch outputting the electric current are connected in series, wherein

a series-parallel switch circuit is constituted by connecting the series switch circuits in parallel,

middle points of the series switch circuits are joined, and

when the series-parallel switch circuit is turned on, the second switches constituting the series-parallel switch circuit are turned on, thereafter, the first switches constituting the series-parallel switch circuit are turned on, and thereafter, at least one of the first switches is turned on, whereby electric current non-conducting state is cancelled.