FILM CAPACITOR AND CONNECTION TYPE CAPACITOR, INVERTER, AND ELECTRIC-POWERED VEHICLE

• US 20160372264A1
• Filed: 03/03/2015
• Published: 12/22/2016
• Est. Priority Date: 03/03/2014
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: MAEDA, Kazutaka, KATO, Wataru
• Granted Patent: US 10,147,542 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 6/28 characterised by the electric energy storing means, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: H01G 4/005 Electrodes
• CPC Class Codes: H01G 4/04 Liquid dielectrics
• CPC Class Codes: H01G 4/18 of synthetic material, e.g. derivatives of cellulose H01G4/16 takes precedence
• CPC Class Codes: H01G 4/20 using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 H01G4/12 takes precedence
• CPC Class Codes: H01G 4/32 Wound capacitors
• CPC Class Codes: H01G 4/33 Thin- or thick-film capacitors thin- or thick-film circuits H01L27/00; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor H01L28/40
• CPC Class Codes: H01G 4/38 Multiple capacitors, i.e. structural combinations of fixed capacitors
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/5387 in a bridge configuration
• CPC Class Codes: H02P 27/06 using dc to ac converters or inverters H02P27/05 takes precedence
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10S 903/907 Electricity storage, e.g. battery, capacitor

Abstract

There is a film capacitor capable of suppressing decrease in the electrostatic capacitance even after a self-healing phenomenon has occurred. A film capacitor includes a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin. The organic resin is preferably any one of a cyclic olefin-based resin, a polyarylate resin, a polyphenylene ether resin and a polyetherimide resin. The organic component is preferably at least one selected from the group consisting of cyclohexane, ethylcyclohexane, toluene, xylene, chloroform, and tetrahydrofuran.

Claims

1. A film capacitor, comprising:

a dielectric film; and

an electrode film disposed on a principal surface of the dielectric film,

the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin.

2. The film capacitor according to claim 1, wherein the organic resin is a cyclic olefin-based resin.

3. The film capacitor according to claim 2, wherein the cyclic olefin-based resin is a ring-opening polymer or an addition copolymer.

4. The film capacitor according to claim 2, wherein the organic component is any one of cyclohexane, ethylcyclohexane, toluene, xylene, and a mixture of cyclohexane and toluene.

5. The film capacitor according to claim 1, wherein the organic resin is a polyarylate resin.

6. The film capacitor according to claim 5, wherein the organic component is any one of toluene, tetrahydrofuran, and n-methylpyrrolidone.

7. The film capacitor according to claim 1, wherein the organic resin is a polyphenylene ether resin or a polyetherimide resin.

8. The film capacitor according to claim 7, wherein the organic component is chloroform.

9. The film capacitor according to claim 1, wherein a content of the organic component contained in the dielectric film is 0.01 to 7 mass %.

10. A connection type capacitor, comprising:

a plurality of the film capacitors according to claim 1; and

a bus bar connecting the plurality of the film capacitors.

11. An inverter, comprising:

a bridge circuit composed of switching elements; and

a capacitor part connected to the bridge circuit,

the capacitor part being composed of the film capacitor according to claim 1.

12. An inverter, comprising:

a bridge circuit composed of switching elements; and

a capacitor part connected to the bridge circuit,

the capacitor part being composed of the connection type capacitor according to claim 10.

13. An electric-powered vehicle, comprising:

a power supply;

an inverter connected to the power supply;

a motor connected to the inverter; and

wheels driven by the motor,

the inverter being composed of the inverter according to claim 11.

14. An electric-powered vehicle, comprising:

a power supply;

an inverter connected to the power supply;

a motor connected to the inverter; and

wheels driven by the motor,

the inverter being composed of the inverter according to claim 12.