# US 10,374,523 B2 · Power conversion device

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- Number: US 10,374,523 B2
- Document ID: US10374523B2
- Status: Granted
- Kind: B2
- Application number: 16/209,002
- Filed: 2018-12-04
- Published: 2019-06-06
- Granted: 2019-08-06
- Earliest claimed: 2017-12-04
- Assignees: Toyota Jidosha Kabushiki Kaisha; Denso Corporation
- Applicants: Toyota Jidosha Kabushiki Kaisha; Denso Corporation
- Inventors: Shinichi Miura; Hiroki Umeda; Kenshi Yamanaka; Yutaka Morimoto; Kazuki Hayashi; Hiromi Yamasaki; Hitoshi Imura; Tomohisa Sano; Daisuke Harada; Hideaki Tachibana
- Web page: https://patentgrep.com/patent/US10374523B2

## CPC

- B60L 3/003: {relating to inverters}
- B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors}
- B60L 50/51: characterised by AC-motors
- B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75)
- B60L 53/24: Using the vehicle's propulsion converter for charging
- H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections}
- H02M 7/515: using semiconductor devices only
- H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)}
- H05K 7/14329: {specially adapted for the configuration of power bus bars}
- B60L 2210/40: DC to AC converters
- B60L 2260/162: of electrical cells or capacitors
- H02M 1/007: {Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826)}
- H02M 1/008: {Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators}
- H02M 3/1588: {comprising at least one synchronous rectifier element (H02M3/1582, H02M3/1584 take precedence)}
- H02M 7/5387: in a bridge configuration
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 90/14: Plug-in electric vehicles
- 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
- 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)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A power conversion device includes a case including an upper case and a lower case; an inverter that is accommodated in a first partial case and is fixed to the first partial case, the first partial case being one of the upper case and the lower case; and a capacitor that is connected to the inverter by a positive electrode bus bar and a negative electrode bus bar, the capacitor being disposed in an internal space of a second partial case that is another of the upper case and the lower case. The first partial case includes a fastening portion that extends from an internal space of the first partial case to the internal space of the second partial case. In the internal space of the second partial case, the capacitor is fastened to the fastening portion.

## Claims

### Claim 1

A power conversion device comprising:
a case including an upper case and a lower case;
an inverter that is accommodated in a first partial case and is fixed to the first partial case, the first partial case being one of the upper case and the lower case; and
a capacitor that is connected to the inverter by a positive electrode bus bar and a negative electrode bus bar, the capacitor being disposed in an internal space of a second partial case that is another of the upper case and the lower case, wherein
the first partial case includes a fastening portion that extends from an internal space of the first partial case to the internal space of the second partial case, and
in the internal space of the second partial case, the capacitor is fastened to the fastening portion.

### Claim 2 (depends on 1)

The power conversion device according to claim 1, wherein the positive electrode bus bar and the negative electrode bus bar are arranged close to each other so as to extend in parallel from the capacitor toward the inverter.

### Claim 3 (depends on 1)

The power conversion device according to claim 1, wherein:
the inverter includes a stacked body including a plurality of power modules and a plurality of coolers;
each of the power modules includes a package and a plurality of terminals, the package accommodating a switching element, and each of the plurality of terminals extending from the package and being connected to the positive electrode bus bar or the negative electrode bus bar; and
a clearance is provided between the package and the capacitor when the package and the capacitor are seen in a horizontal direction.

### Claim 4 (depends on 3)

The power conversion device according to claim 3, wherein:
in a section of the capacitor that is orthogonal to a stacking direction of the plurality of power modules, a length of the capacitor in a lateral direction is less than a length of the capacitor in a vertical direction; and
electrodes that are connected to the positive electrode bus bar and the negative electrode bus bar are arranged on side surfaces of the capacitor, the side surfaces facing in the lateral direction.