# US 10,873,269 B2 · Electric power conversion apparatus

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- Number: US 10,873,269 B2
- Document ID: US10873269B2
- Status: Granted
- Kind: B2
- Application number: 16/659,705
- Filed: 2019-10-22
- Published: 2020-02-13
- Granted: 2020-12-22
- Earliest claimed: 2017-04-25
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Takuro Tsutsui; Daisuke Harada
- Web page: https://patentgrep.com/patent/US10873269B2

## CPC

- H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections}
- H02M 7/48: using discharge tubes with control electrode or semiconductor devices with control electrode
- H05K 7/20927: {Liquid coolant without phase change}
- H02M 7/12: using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M 7/72: using discharge tubes with control electrode or semiconductor devices with control electrode
- 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

## Abstract

An electric power conversion apparatus includes: a heat-generating element; a case having a cooling wall portion on which the heat-generating element is held and accommodating the heat-generating element; a flow passage cover having an opening formed therein and covering a surface of the cooling wall portion on the opposite side to the heat-generating element; a standing portion standing from the cooling wall portion and inserted in the opening; a flow-passage side wall portion formed in one of the cooling wall portion and the flow passage cover to protrude toward the other; a coolant flow passage surrounded by the cooling wall portion, the flow passage cover and the flow-passage side wall portion; and a sealant that seals both a gap between the cooling wall portion and the flow passage cover at a periphery of the coolant flow passage and a gap between the standing portion and the flow passage cover.

## Claims

### Claim 1

An electric power conversion apparatus comprising:
a heat-generating element;
a case having a cooling wall portion on which the heat-generating element is held and accommodating the heat-generating element;
a flow passage cover having an opening formed therein and covering a surface of the cooling wall portion on an opposite side to a surface of the cooling wall portion on which the heat-generating element is held;
a standing portion standing from the cooling wall portion and inserted in the opening of the flow passage cover;
a flow-passage side wall portion formed in one of the cooling wall portion and the flow passage cover to protrude toward the other of the cooling wall portion and the flow passage cover;
a coolant flow passage surrounded by the cooling wall portion, the flow passage cover and the flow-passage side wall portion; and
a sealant that seals both a gap between the cooling wall portion and the flow passage cover at a periphery of the coolant flow passage and a gap between the standing portion and the flow passage cover.

### Claim 2 (depends on 1)

The electric power conversion apparatus as set forth in claim 1, wherein the heat-generating element is arranged to overlap the standing portion in a standing direction in which the standing portion stands from the cooling wall portion.

### Claim 3 (depends on 1)

The electric power conversion apparatus as set forth in claim 1, wherein the sealant is constituted of a liquid gasket.

### Claim 4 (depends on 1)

The electric power conversion apparatus as set forth in claim 1, wherein the heat-generating element is a reactor.

### Claim 5 (depends on 1)

The electric power conversion apparatus as set forth in claim 1, further comprising a heat-dissipating member interposed between the heat-generating element and the cooling wall portion to facilitate heat transfer from the heat-generating element to the cooling wall portion.

### Claim 6

An electric power conversion apparatus comprising:
a heat-generating element;
a case having a cooling wall portion on which the heat-generating element is held and accommodating the heat-generating element;
a flow passage cover covering a surface of the cooling wall portion on an opposite side to a surface of the cooling wall portion on which the heat-generating element is held;
a standing portion standing from the flow passage cover and abutting the cooling wall portion;
a flow-passage side wall portion formed in one of the cooling wall portion and the flow passage cover to protrude toward the other of the cooling wall portion and the flow passage cover;
a coolant flow passage surrounded by the cooling wall portion, the flow passage cover and the flow-passage side wall portion; and
a sealant that seals a gap between the cooling wall portion and the flow passage cover at a periphery of the coolant flow passage.

### Claim 7 (depends on 6)

The electric power conversion apparatus as set forth in claim 6, wherein the heat-generating element is arranged to overlap the standing portion in a standing direction in which the standing portion stands from the flow passage cover.

### Claim 8 (depends on 6)

The electric power conversion apparatus as set forth in claim 6, wherein the sealant is constituted of a liquid gasket.

### Claim 9 (depends on 6)

The electric power conversion apparatus as set forth in claim 6, wherein the heat-generating element is a reactor.

### Claim 10 (depends on 6)

The electric power conversion apparatus as set forth in claim 6, further comprising a heat-dissipating member interposed between the heat-generating element and the cooling wall portion to facilitate heat transfer from the heat-generating element to the cooling wall portion.