# US 2013/0154580 A1 · Apparatus for charging thin-film capacitors

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- Number: US 2013/0154580 A1
- Document ID: US20130154580A1
- Status: Published application
- Kind: A1
- Application number: 13/807,900
- Filed: 2010-07-01
- Published: 2013-06-20
- Earliest claimed: 2010-07-01
- Assignees: Kanji SHIMIZU
- Inventors: Kanji Shimizu
- Web page: https://patentgrep.com/patent/US20130154580A1

## CPC

- H02J 7/575: {Parallel/serial switching of connection of batteries to charge or load circuit}
- H02M 3/07: using capacitors charged and discharged alternately by semiconductor devices with control electrode {, e.g. charge pumps}
- H02M 3/072: {adapted to generate an output voltage whose value is lower than the input voltage}
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)

## Abstract

It is possible to prevent overcurrent from flowing at the time of initially charging thin-film capacitors with an inexpensive configuration. There are provided a direct current power supply DC supplying direct current to plural thin-film capacitors, resistors connected in series to the respective thin-film capacitors for limiting the current value of the direct current to be supplied from the direct current power supply DC to the thin-film capacitors, and series-parallel system changeover switches SW connected in series to the respective thin-film capacitors and having one contacts establishing, when selected, a series connection short-circuiting both ends of each thin-film capacitor and other contacts establishing, when selected, parallel connections supplying direct current through the resistors to the thin-film capacitors. A charging operation switch SW1 and a discharge operation switch SW2 are switched so that, at the time of charging, current supplied to the thin-film capacitors C is suppressed by the resistors by the parallel connections, and, at the time of discharging, discharging is permitted by the series connection, irrespective of the resistors.

## Claims

### Claim 1

An apparatus for charging thin-film capacitors for use in a direct current circuit, characterized by:
a direct current power supply supplying direct current to the thin-film capacitors;
resistors connected in series to the thin-film capacitors for limiting a current value of the direct current supplied from said direct current power supply to the thin-film capacitors; and
system changeover switches connected to the thin-film capacitors for selecting parallel connections and a series connection, whereby all the thin-film capacitors are connected to the resistors for limiting current used at a time of charging to allow charging in the parallel connections, and all the thin-film capacitors are connected in series at a time of discharging to allow discharging.