# US 12,224,129 B2 · Film capacitor, connected capacitor, inverter, and electric vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,129 B2 - Document ID: US12224129B2 - Status: Granted - Kind: B2 - Application number: 18/007,238 - Filed: 2021-07-01 - Published: 2023-08-31 - Granted: 2025-02-11 - Earliest claimed: 2020-07-31 - Assignees: KYOCERA Corporation - Applicants: KYOCERA Corporation - Inventors: Kazuki Imagawa; Naoki Kikuchi; Yuki Senoo; Nobuhiro Kobayashi - Web page: https://patentgrep.com/patent/US12224129B2 ## CPC - H01G 4/224: Housing; Encapsulation - H01G 4/306: {made by thin film techniques} - B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75) - H01G 4/14: Organic dielectrics - H01G 4/18: of synthetic material, e.g. derivatives of cellulose (H01G4/16 takes precedence) - H01G 4/232: electrically connecting two or more layers of a stacked or rolled capacitor - H01G 4/30: Stacked capacitors (H01G4/33 takes precedence) - H01G 4/38: Multiple capacitors, i.e. structural combinations of fixed capacitors - H01G 4/40: Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations - H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence) - B60L 2210/40: DC to AC converters - H01G 4/015: Special provisions for self-healing - H01G 4/32: Wound capacitors - H01G 4/33: Thin- or thick-film capacitors {(thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)} - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A film capacitor includes a stack including at least one dielectric film and a plurality of metal films, the at least one dielectric film including a polyarylate film, wherein each of the at least one of dielectric film and each of the plurality of metal films are alternately stacked in a stacking direction, each of the plurality of metal films deposited on each of the at least one dielectric film by vapor deposition, cover films on two first side surfaces, the two first side surfaces facing each other in a first direction, the first direction orthogonal to the stacking direction, the cover films containing a polyester hot-melt resin, and metal-sprayed electrodes on two second side surfaces, the two second side surfaces facing each other in a second direction, the second direction perpendicular to the first direction and orthogonal to the stacking direction. ## Claims ### Claim 1 A film capacitor comprising: a stack including at least one dielectric film and a plurality of metal films, the at least one dielectric film including a polyarylate film, wherein each of the at least one of dielectric film and each of the plurality of metal films are alternately stacked in a stacking direction, each of the plurality of metal films deposited on each of the at least one dielectric film by vapor deposition; cover films on two first side surfaces, the two first side surfaces facing each other in a first direction, the first direction orthogonal to the stacking direction, the cover films comprising a polyester hot-melt resin; and metal-sprayed electrodes on two second side surfaces, the two second side surfaces facing each other in a second direction, the second direction perpendicular to the first direction and orthogonal to the stacking direction. ### Claim 2 (depends on 1) The film capacitor according to claim 1, wherein each cover film of the cover films has a thickness that is 0.1 μm, 1000 μm, or larger than 0.1 μm and smaller than 1000 μm. ### Claim 3 (depends on 2) A connected capacitor comprising: a plurality of film capacitors including the film capacitor according to claim 2; and a busbar connecting the plurality of film capacitors. ### Claim 4 (depends on 2) An inverter comprising: a bridge circuit including a switching element; and a capacitance portion connected to the bridge circuit, the capacitance portion including the film capacitor according to claim 2. ### Claim 5 (depends on 1) A connected capacitor comprising: a plurality of film capacitors including the film capacitor according to claim 1; and a busbar connecting the plurality of film capacitors. ### Claim 6 (depends on 1) An inverter comprising: a bridge circuit including a switching element; and a capacitance portion connected to the bridge circuit, the capacitance portion including the film capacitor according to claim 1. ### Claim 7 (depends on 6) An electric vehicle comprising: a power supply; the inverter according to claim 6 connected to the power supply; a motor connected to the inverter; and wheels drivable by the motor.