US-20260129779-A1 - POWER CONVERSION DEVICE

US20260129779A1US 20260129779 A1US20260129779 A1US 20260129779A1US-20260129779-A1

Abstract

A power conversion device according to one embodiment of the present invention comprises: a case including a base and a side plate extending in the vertical direction from the base; a substrate disposed inside the case and facing the base; and one or more first holes which are formed in the side plate of the case and through which cables connected to the substrate passes, wherein the first holes are formed at positions corresponding to positions where the cables are connected to the substrate.

Inventors

Mi Sun LEE

Assignees

LG INNOTEK CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20221208
Priority Date: 20211209

Claims (20)

1 .- 10 . (canceled)
11 . A power conversion device, comprising: a case comprising a base and a side plate extending in the vertical direction from the base; a substrate disposed inside the case and facing the base; and one or more first holes formed in the side plate of the case and through which a cable connected to the substrate passes, wherein the first hole is formed at a position corresponding to a position where the cable is connected to the substrate.
12 . The power conversion device of claim 11 , wherein the first hole is formed at a location corresponding to a length from the base to a second surface of the substrate which is an opposite side of a first surface of the substrate facing the base.
13 . The power conversion device of claim 11 , wherein an interior of the case is filled with a molding fluid and molded.
14 . The power conversion device of claim 11 , comprising a connector connecting the cable to the substrate and disposed on a second surface of the substrate opposite a first surface of the substrate facing the base.
15 . The power conversion device of claim 14 , comprising a fixing part protruding from a surface of the base facing the substrate corresponding to a position of the connector, wherein the substrate comprises a second hole corresponding to the fixing part, and wherein the connector combines the fixing part, the substrate, and the cable.
16 . The power conversion device of claim 11 , comprising a cover facing the base and covering the case.
17 . The power conversion device of claim 11 , comprising a fastening part fastening the cable to the first hole.
18 . The power conversion device of claim 17 , wherein the fastening part comprises: a first plate; a stepped portion protruding from one surface of the first plate; and a third hole penetrating the first plate and the stepped portion, with the cable located therein, and wherein the third hole having a length from a center of the third hole to an outermost edge of the stepped portion corresponding to a radius of the first hole.
19 . The power conversion device of claim 18 , wherein a cross-sectional shape of the stepped portion is a ring shape in which a hole is formed, or a shape comprising a ring shape and a plurality of protrusions protruding from the ring shape.
20 . The power conversion device of claim 17 , wherein the fastening part comprises: a first fastening part contacting with the cable in a first direction and comprising a semi-circularly shaped first rib on which the cable is located; and a second fastening part contacting with the cable in a second direction opposite to the first direction and comprising a semi-circularly shaped second rib on which the cable is located.
21 . The power conversion device of claim 20 , wherein the first rib and the second rib form a third hole in which the cable is disposed.
22 . The power conversion device of claim 11 , wherein the cable comprises one or more input cables receiving power and one or more output cables outputting power.
23 . The power conversion device of claim 11 , wherein the substrate comprises power conversion elements receiving and converting multi-level power.
24 . A power conversion device case, comprising: a base; a side plate extending in the vertical direction from the base; and one or more first holes formed in the side plate, wherein a cable connected to the substrate disposed inside the case passes the first hole, and wherein the first hole is formed at a position corresponding to a position where the cable is connected to the substrate.
25 . The power conversion device case of claim 24 , comprising a fastening part fastening the cable to the first hole.
26 . The power conversion device case of claim 25 , wherein the fastening part comprises: a first plate; a stepped portion protruding from one surface of the first plate; and a third hole penetrating the first plate and the stepped portion, with the cable located therein, and wherein the third hole having a length from a center of the third hole to an outermost edge of the stepped portion corresponding to a radius of the first hole.
27 . The power conversion device case of claim 25 , wherein the fastening part comprises: a first fastening part contacting with the cable in a first direction and comprising a semi-circularly shaped first rib on which the cable is located; and a second fastening part contacting with the cable in a second direction opposite to the first direction and comprising a semi-circularly shaped second rib on which the cable is located.
28 . A power conversion device manufacturing method, comprising: disposing a substrate inside a case facing a base of the case; passing a cable through a first hole formed in a side plate extending from the base of the case, combining the base, the substrate, and the cable with a connector; closing a space between the first hole and the cable with a fastening part fastening the cable to the first hole; and molding an interior of the case with a molding fluid.
29 . The power conversion device manufacturing method of claim 28 , wherein the fastening part combines the first hole and the cable at an exterior side of the case, and comprising removing the fastening part after the step of molding.

Description

TECHNICAL FIELD The teachings in accordance with exemplary and non-limiting embodiments of this invention relate generally to a power conversion device, and more particularly, to a power conversion device applied with a molding structure, a power conversion device case and a power conversion device manufacturing method. BACKGROUND ART Photovoltaic power generation is an eco-friendly energy generation method that has been widely used to replace conventional chemical and nuclear power generation. The photovoltaic power generation may include a stand-alone type where batteries are connected to a converter, and grid-connected system. In general, stand-alone power generation consists of solar cells, storage batteries, and power conversion devices, while grid-connected systems are connected to commercial power sources so that power can be exchanged with the load grid. Solar modules have different maximum points depending on sunlight, temperature, etc. To operate solar cells at their maximum power point, module-level power electronics (MLPE) with maximum power point tracking (MPPT) control on a module-by-module basis can be used. Because MLPEs include many power conversion elements for maximum power point tracking, they can generate a lot of heat during the power conversion process. Since the temperature rise caused by heat affects the power conversion, a structure with effective heat dissipation is required. DETAILED DESCRIPTION OF INVENTION Technical Subject The technical problem that the present invention seeks to solve is to provide a power conversion device applied with a molding structure, a power conversion device case and a power conversion device manufacturing method. Technical Solution In order to solve the technical subject, a power conversion device according to an exemplary embodiment of the present invention may comprise: a case including a base and a side plate extending in the vertical direction from the base; a substrate disposed inside the case and facing the base; andone or more first holes which are formed in the side plate of the case and through which cables connected to the substrate passes, whereinthe first holes are formed at positions corresponding to positions where the cables are connected to the substrate. Preferably, but not necessarily, the first hole may be formed at a location corresponding to a length from the base to a second surface of the substrate which is an opposite side of the first surface of the base. Preferably, but not necessarily, the interior of the case may be filled with a molding fluid and molded. Preferably, but not necessarily, the power conversion device may include a connector connecting the cable to the substrate by being disposed on a second surface of the substrate opposite a first surface of the base. Preferably, but not necessarily, the power conversion device may include a fixture projecting from a side of the base opposite the substrate corresponding to a position of the connector, wherein the substrate may include a second hole corresponding to the fixture, and the connector may be able to engage the fixture, the substrate, and the cable. Preferably, but not necessarily, the power conversion device may include a cover that faces the base and that covers the case. Preferably, but not necessarily, the power conversion device may include a fastener for fastening the cable to the first hole. Preferably, but not necessarily, the fastener may include: a first plate; a stepped portion projecting from one surface of the first plate; and a third hole through the first plate and the end portion, with the cable located therein, the third hole having a length from a center of the third hole to an outermost edge of the stepped portion corresponding to a radius of the first hole. Preferably, but not necessarily, the cross-sectional shape of the stepped portion may be a ring shape in which a hole is formed, or a shape comprising a ring shape and a plurality of protrusions projecting from the ring shape. Preferably, but not necessarily, the fastener may include: a first fastener comprising a semicircular first rib in contact with the cable in a first direction, on which the cable is located; and a second fastener comprising a semicircular second rib in contact with the cable in a second direction opposite to the first direction, on which the cable is located. Preferably, but not necessarily, the first rib and the second rib may form a third hole in which the cable is disposed. Preferably, but not necessarily, the cable may include one or more input cables to receive power and one or more output cables to output power. Preferably, but not necessarily, the substrate may include power conversion elements that receive and convert multi-level power. In order to solve the technical subject, a power conversion device case according to an exemplary embodiment of the present invention may comprise: a base;a side plate extending perpendicularly from the base; andat least one fir