KR102647793B1 - Container for on-board charger - Google Patents

Abstract

A container for On Board Charger (OBC) is disclosed. A container for OBC according to an embodiment of the present invention is provided with a block housing having a box shape, a bottom cooling passage provided at the bottom of the block housing so that the refrigerant circulates in the horizontal direction inside the box, and a path of the bottom cooling passage. It includes a vertical cooling passage that circulates vertically inside the box.

Description

Container for OBC {Container for on-board charger}

The present invention relates to a container for OBC, and more specifically, to a container for OBC that can effectively cool the heat generated from electronic components housed therein.

Recently, issues such as depletion of petroleum resources, high oil prices, and environmental pollution continue to arise for internal combustion engine vehicles that use fossil fuels such as gasoline and diesel, and the development of eco-friendly vehicles that can replace them is rapidly progressing.

Eco-friendly vehicles include hybrid vehicles (Plug-in Hybrid Electric Vehicle (PHEV)), electric vehicles (EV), and hydrogen vehicles (Fuel Cell Electric Vehicle (FCEV)).

Typically, electric vehicles (including hybrid vehicles that use electricity) include a motor that generates rotational force, a battery that provides power to the motor, an inverter that controls the rotation speed of the motor, a charger that stores electricity in the battery, and Includes a DC converter to generate power for vehicles.

Vehicle battery chargers can be divided into fast chargers and slow chargers depending on the charging time, and can also be divided into on-board chargers (OBC) and stationary types depending on whether they are mounted on the vehicle.

The on-board charger converts AC power into direct current power from an external power source through a charger (OBC) mounted inside the vehicle, charging the battery with the electrical energy required for driving, and controlling the motor coupled to the wheel with the voltage charged in the battery. This obtains power, which is mechanical energy.

Additionally, an on-board charger (OBC) requires packaging to construct high-voltage switches, inductors, capacitors, transformers, relays, control boards, etc., and these components are crowded inside the packaging. In a charger with a dense structure, the temperature inside the packaging is likely to rise due to the heat generated from each component when charging the battery, and this can lead to a fire in the case of temperature-sensitive components, so the packaging is equipped with a device to dissipate the heat generated internally. A means of cooling is required.

Korean Patent Publication No. 10-2017-0112160 (2017.10.12)

According to an embodiment of the present invention, it is intended to provide a container for OBC that can improve cooling performance.

According to one aspect of the present invention, a block housing having a box shape, a bottom cooling passage provided at the bottom of the block housing to allow refrigerant to circulate horizontally inside the box, and a bottom cooling passage provided on the path of the bottom cooling passage to circulate the inside of the box. A container for OBC including a vertical cooling passage provided to circulate in the vertical direction may be provided.

Additionally, the block housing may include a partition that divides the interior, and the vertical cooling passage may be provided inside the partition.

In addition, the partition includes a first partition extending inward from one side wall of the block housing, a second partition extending inward from one side wall spaced apart from the first partition, and connecting the first partition and the second partition. It includes a third partition provided in parallel and spaced apart from one side wall, and the vertical cooling passage may be provided to penetrate the inside of the first to third partitions.

Additionally, the interior of the block housing is divided into three spaces by the first and second partitions, and a transformer and an inductor can be placed in the central space.

Additionally, the bottom cooling passage and the vertical cooling passage are recessed into the bottom of the block housing and may be closed by an under cover.

The OBC container according to an embodiment of the present invention appropriately arranges a plurality of electronic components with different heat generation levels in the partitioned internal space using a bottom cooling passage provided on the bottom of the box-shaped housing and a vertical cooling passage provided in the internal partition. By doing so, the heat generated from each component can be effectively cooled.

In addition, in the OBC container according to an embodiment of the present invention, the parts that generate the most heat are placed in the central space where vertical cooling passages are formed on three or two sides, and the parts that generate relatively large heat are disposed of with more coolant than the vertical cooling passages. It is placed on the bottom of the side space where a bottom cooling passage with a wide contact area is formed, and the remaining parts with relatively small heat generation are placed on the side space where a vertical cooling passage with a smaller refrigerant contact area than the bottom cooling passage is formed on one side of the partition. By placing it inside, the heat generated from each electronic component can be effectively cooled.

Figure 1 is a perspective view showing a container for OBC according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a container for OBC according to an embodiment of the present invention.
Figure 3 is a bottom view of a container for OBC according to an embodiment of the present invention.
Figure 4 is a cross-sectional view taken along line IV-IV in Figure 1.
FIG. 5 is a cross-sectional view taken along line V-V in FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing the present application, various alternatives may be used to replace them. It should be understood that equivalents and variations may exist.

Figure 1 is a combined perspective view showing a container for OBC according to an embodiment of the present invention, and Figure 2 is an exploded perspective view showing a container for OBC according to an embodiment of the present invention. As shown, the OBC container according to this embodiment includes a box-shaped block housing 10, and accommodates various electronic components P necessary for OBC electronic control therein.

Hereinafter, in this embodiment, the components installed inside the OBC (on Board Charger (hereinafter referred to as OBC)) container include a transformer (1), an inductor (2), a diode (3), an EMI Filter (4), and a capacitor (5). Although devices such as the like are exemplified as examples, it goes without saying that the present invention may further include other electronic components in addition to the above electronic components.

The block housing 10 is made of metal and has a rectangular shape with an open top as shown disassembled in FIG. 2, and has a base 11 forming the bottom surface and four side walls surrounding the outside of the base 11 ( Includes 12a~12d). One side wall (12a) of the block housing (10) is provided with a refrigerant that supplies refrigerant into the block housing (10) to cool the heat generated from electronic components and allows the refrigerant that circulates inside the block housing to be discharged to the outside. A supply port 13 and a refrigerant discharge port 14 may be provided. The positions of the refrigerant supply port 13 and the refrigerant discharge port 14 may be changed or may be provided on different side walls. In addition, connectors 15 and 16 may be provided on one side wall 12a of the block housing 10 to supply power to electronic components or input and output signals, and a plurality of brackets 17 for fixation are provided on the outer side. It can be provided in .

A printed circuit board (PCB; 20) may be provided on the open upper part of the block housing 10 to electrically connect and control electronic components, and a top cover 30 is provided on the PCB 20 to form a block housing ( 10), the inside of the housing can be formed into a closed space.

According to this embodiment, the block housing 10 includes a bottom cooling passage B that allows the refrigerant flowing in through the refrigerant supply port 13 to circulate inside in the horizontal direction, and a bottom cooling passage B that allows the refrigerant to circulate inside in the vertical direction. It may include a vertical cooling passage (V).

As shown in FIG. 3, the bottom cooling passage (B) is provided on the base 11, which is the bottom surface of the block housing 10. The bottom cooling passage (B) is provided in a flat shape as a whole in the base 11, and is connected to the refrigerant supply port 13 and the refrigerant discharge port 14 provided on one side wall (12a). The inlet (B1) of B1-1) and the outlet (B2) of baton cooling passage (B2-1) are recessed deeper inward. An under cover (18 in FIG. 2) may be coupled to the bottom of the block housing 10 to close the bottom cooling passages B1, B1-1, B2, and B2-1 formed in the base 11.

The vertical cooling passage (V) is a bottom cooling passage so that the refrigerant flowing in from the bottom cooling passage (B1-1) can escape to the bottom cooling passage (B2-1) that circulates more widely in the inner space of the block housing (10). provided on the route.

In order to form a vertical cooling passage (V), the block housing 10 is provided with a plurality of partitions (P1 to P3) to divide the internal space. The plurality of partitions (P1 to P3) include a first partition (P1) extending inward from the other side wall (12c) of the block housing toward one side wall (12a), and the other side wall (P1) spaced apart from the first partition (P1). A second partition (P2) extending inward from 12c), and a third partition connecting the inner ends of the first partition (P1) and the second partition (P2) and arranged in parallel and spaced apart from one side wall (12a). Includes partition (P3). The internal space of the block housing 10 may be divided into thirds (S1 to S3) in one direction by the first partition (P1) and the second partition (P2).

The vertical cooling passage (V) is provided through the inside of the first partition (P1) to the third partition (P3), and since the passage must be connected to the bottom cooling passage (B1-1, B2-1), the bottom cooling passage ( Like B), the block housing 10 has a shape recessed inward when viewed from the bottom. As shown in FIG. 2, when viewed from the top of the block housing 10, the vertical cooling passage V has a shape that protrudes from the base 11 at the bottom into the inner space.

According to this embodiment, the central center space (S1) of the three divided spaces (S1, S2, S3) of the block housing (10) surrounded by the vertical cooling passage (V) has vertical cooling passages (V1 to V3) on three sides. Alternatively, the transformer 1 and the inductor 2, which are passive devices that generate the most heat among a plurality of electronic components because they are formed on two sides and have the largest contact area with the coolant, may be disposed. The transformer (1) can be installed in the center space formed by the vertical cooling passages (V1 to V3) on three sides, and the inductor (2) can be installed in the center space formed by the vertical cooling passages (V1, V2) on two sides. It can be. A spacer may be positioned between the transformer 1 and the inductor 2 to reduce the gap between the two members.

In addition, in the side spaces (S2, S3) on both sides of the block housing (10), on the outside adjacent to the side wall (12), there is a bottom cooling passage (B1-1, Since B2-1) is located on the bottom, other passive elements that generate relatively large heat among electronic components, such as EMI filter (3), capacitor (4), relay, etc., can be placed.

In addition, on the inside adjacent to the first and second partitions (P1, P2) where the vertical cooling passage (V) is formed in the side spaces (S2, S3) on both sides of the block housing 10, a bottom cooling passage (B1-1, B2-1) Since the vertical cooling passage (V1 or V2) with a narrower refrigerant contact area is formed only on one side, the bridge diode, MosFET, and diode (3) are active elements with relatively lowest heat generation among electronic components. , discrete devices, etc. can be placed.

That is, in the OBC container according to this embodiment, the parts generating the most heat are placed in the center space (S1) where the vertical cooling passages (V) are formed on three or two sides, and the parts generating relatively large heat are placed in the vertical cooling channel (V). It is placed on the bottom of the side space (S2, S3) where the bottom cooling passage (B), which has a wider refrigerant contact area than the cooling passage (V), is formed, and the remaining parts that generate relatively less heat are placed on the bottom cooling passage (B). A vertical cooling passage (V) with a relatively narrow refrigerant contact area is placed inside the side space (S2, S3) formed on one side of the partition, thereby dissipating the heat generated from each electronic component into the refrigerant circulating through the block housing (10). It can be cooled effectively.

1..Transformer 2..Inductor
3..Diode 4..EMI Filter
5..capacitor 10..block housing
11..Base 12..Sidewall
13,14..Refrigerant supply port and refrigerant discharge port 18..Under cover
20..PCB 30..Top Cover
B, B1-1, B2-1.. Bottom cooling flow path P1, P2, P3.. 1st partition to 3rd partition
S1, S2, S3.. Internal space V, V1, V2, V3.. Vertical cooling channel

Claims (5)

A block housing having a box shape,
A bottom cooling passage provided at the bottom of the block housing to allow refrigerant to circulate horizontally inside the box,
A vertical cooling passage is provided on the path of the bottom cooling passage and is provided to circulate in the vertical direction inside the box,
The bottom cooling passage has an inlet and an outlet formed to be recessed so as to be respectively connected to a refrigerant supply port and a refrigerant discharge port provided on one side wall of the block housing,
The vertical cooling passage is provided so that the refrigerant hydraulically pressed from the bottom cooling passage passes through the inside of the partition dividing the block housing and exits into the bottom cooling passage,
The partition includes a first partition extending inward from one side wall of the block housing, a second partition extending inward from one side wall spaced apart from the first partition, and connecting the first partition and the second partition. A container for OBC that includes a third partition arranged in parallel and spaced apart from one side wall. delete delete According to clause 1,
The interior of the block housing is divided into three spaces by the first and second partitions, and the transformer and inductor are spaced apart from each other in the central space. According to any one of claims 1 and 4,
A container for OBC in which the bottom cooling passage and the vertical cooling passage are recessed into the bottom of the block housing and closed by an under cover.

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