KR102725755B1 - Battery charger for electric vehicle - Google Patents

Abstract

According to one aspect of the present invention, a battery charging device for an electric vehicle is provided, which includes a housing forming an accommodation space therein; a partition formed within the accommodation space; an insulating sheet attached to the partition; and a switching element attached to the insulating sheet.

Description

{BATTERY CHARGER FOR ELECTRIC VEHICLE}

The present invention relates to a battery charging device for an electric vehicle that charges a vehicle driving battery mounted on an electric vehicle, and more specifically, to a battery charging device for an electric vehicle that enables efficient arrangement of various components and simplification of an assembly process.

Pollutants emitted from vehicles, such as exhaust fumes, are one of the main causes of air pollution. Accordingly, regulations on pollutants emitted from vehicles are also continuously being strengthened. In this situation, eco-friendliness is emerging as a major issue for the automobile industry, and research is actively being conducted to commercialize electric vehicles that use electricity, a pollution-free energy source, as a power source.

Electric vehicles receive electric energy from an external source to charge the vehicle drive battery, and then drive the motor coupled to the wheels with the voltage charged in the vehicle drive battery to generate power. Since the vehicle drive battery must drive the motor with the charged voltage to move the vehicle, it is made of a large-capacity rechargeable battery, and the electric vehicle is equipped with a battery charging device to charge this large-capacity vehicle drive battery.

Specifically, electric vehicles are equipped with an electric vehicle battery charging device, commonly called an Onboard Battery Charger (OBC), which receives power from an external electric vehicle supply equipment (EVSE) to charge the vehicle's driving battery.

Battery charging devices for electric vehicles include various switching elements, such as passive elements such as inductors and transformers, and MOSFETs and diodes, within the housing, and securing efficiency in the arrangement and insulation of these elements is required.

In particular, conventional battery charging devices for electric vehicles have a structure that fixes the switching elements using clips and bolts, which complicates the assembly process. In addition, heat dissipation of the switching elements in this structure is also a problem.

Korean Patent Registration No. 10-1375956 “Automobile Electrical Components Box”, Announced on March 18, 2014

The present invention is intended to solve the problems of the above-mentioned prior art,

The purpose of the present invention is to provide a battery charging device for an electric vehicle in which various components are efficiently arranged within a housing.

Another object of the present invention is to provide a battery charging device for an electric vehicle that enables efficient assembly process and heat dissipation of switching elements.

The purpose of the present invention is not limited thereto, and other purposes not mentioned will be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention, a battery charging device for an electric vehicle is provided, comprising: a housing forming an accommodation space therein; a partition wall disposed within the accommodation space; an insulating sheet attached to the partition wall; and a switching element attached to the insulating sheet.

The above insulating sheet has adhesive properties, and the switching element can be attached onto the insulating sheet by the adhesive properties.

The above switching elements can be arranged vertically.

The above insulating sheet can have heat dissipation performance.

The above bulkhead can form a first receiving portion surrounded by the bulkhead within the receiving space.

One or more passive elements, such as an inductor or a transformer, may be placed within the first receiving portion.

A second receiving section may be formed on one side of the first receiving section, in which a filtering module including a circuit for receiving and filtering commercial AC voltage is placed.

It may further include a shielding cover for shielding the above filtering module.

A third receiving area may be formed in a portion of the above receiving space excluding the first receiving area and the second receiving area.

A printed circuit board including circuit elements accommodated in the third receiving portion may be arranged to cover at least a portion of an upper portion of the receiving space.

According to one embodiment of the present invention, various components can be efficiently arranged within a housing of a battery charging device for an electric vehicle.

In addition, according to one embodiment of the present invention, the assembly process and heat dissipation of switching elements in a battery charging device for an electric vehicle can be efficiently performed.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be inferred from the composition of the invention described in the detailed description or claims of the present invention.

FIG. 1 is a perspective view of a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 2 is a perspective view of a housing of a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 3 is a drawing showing an insulating sheet attached to a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 4 is a drawing showing a switching element arranged in a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 5 is a drawing showing a passive component arranged in a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 6 is a drawing showing a filtering module arranged in a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 7 is a drawing showing a printed circuit board arranged in a battery charging device for an electric vehicle according to one embodiment of the present invention.
FIG. 8 is a drawing showing a housing cover arranged in a battery charging device for an electric vehicle according to one embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts that are not related to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

In this specification, it should be understood that terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

FIG. 1 is a perspective view of a battery charging device for an electric vehicle according to one embodiment of the present invention. FIG. 2 is a perspective view of a housing of a battery charging device for an electric vehicle according to one embodiment of the present invention. In addition, FIGS. 3 to 8 are drawings showing the arrangement of each component in a battery charging device for an electric vehicle according to one embodiment of the present invention.

Referring to FIGS. 1 to 8, a battery charging device (1) for an electric vehicle according to one embodiment of the present invention is a device for charging a vehicle driving battery of an electric vehicle, and includes a housing (10), a bulkhead (20), an insulating sheet (30), a switching element (40), a passive element (50), a filtering module (60), a shielding cover (70), a printed circuit board (80), and a housing cover (90).

A battery charging device (1) for an electric vehicle according to one embodiment of the present invention is a device generally called an onboard battery charger (OBC), which receives power from an electric vehicle supply equipment (EVSE) for an electric vehicle and charges a vehicle driving battery mounted on an electric vehicle.

The housing (10) forms an accommodation space inside. In one embodiment of the present invention, the housing (10) is formed in a square box shape with an open top. The housing (10) is provided with an input connector (100) for connection with the power supply device for the electric vehicle on one side, and a sensing connector (200) for transmitting and receiving various sensing information.

In addition, an output interface section (14) is formed on one side of the housing (10) to which an output connector for outputting power for charging the vehicle driving battery is connected.

The interior of the housing (10) is divided into compartments for arranging various elements, and the compartments are divided by partition walls (20). In one embodiment of the present invention, the housing (10) includes a first receiving portion (11) surrounded by the partition walls (20), a second receiving portion (12) formed around the first receiving portion (11), and a third receiving portion (13).

The partition wall (20) is arranged in an accommodation space formed inside the housing (10). The partition wall (20) forms a compartment within the accommodation space. In one embodiment of the present invention, the partition wall (20) forms closed compartments within the accommodation space together with the side wall of the housing (10), and includes a first partition wall (21) that crosses and divides the interior of the housing (10), a second partition wall (22) that meets the first partition wall (21) vertically at the middle of the first partition wall (21) and extends to one side, and a third partition wall (23) that meets the second partition wall (22) vertically at the end of the second partition wall (22) and extends to one side to meet the one side wall of the housing (10).

The first bulkhead (21), the second bulkhead (22), the third bulkhead (23), and the side wall of the housing (10) surround a certain area within the receiving space and form a first receiving portion (11). At this time, the fourth bulkhead (213) connecting the first bulkhead (21) and the third bulkhead (23) divides the first receiving portion (11) into a first-first receiving portion (111) and a first-second receiving portion (112). In addition, the first bulkhead (21) and the side wall of the housing (10) surround a certain area within the receiving space and form a second receiving portion (12). Meanwhile, the space of the receiving space excluding the first receiving portion (11) and the second receiving portion (12) is formed as a third receiving portion (13).

The insulating sheet (30) is a sheet member attached to the bulkhead (20). The insulating sheet (30) has insulating properties, and in addition, has adhesive properties. In addition, the insulating sheet (30) also has a certain level of heat dissipation performance. Specifically, the insulating sheet (30) may be made of a heat-conductive silicone material.

The insulating sheet (30) has adhesive properties, so that the switching element (40) can be attached to the bulkhead (20) without using additional components such as clips and bolts. In addition, it has heat dissipation performance, so that the switching element (40) can be smoothly dissipated.

Referring to FIG. 3, the insulating sheet (30) may include a first insulating sheet (31) attached to the first bulkhead (21), a second insulating sheet (32) attached on the second bulkhead (22), and a third insulating sheet (33) attached on the third bulkhead (23).

The switching elements (40) are elements attached on the insulating sheet (30). The switching elements (40) can be fixed on the insulating sheet (30) without a separate configuration due to the adhesiveness of the insulating sheet (30). At this time, the switching elements (40) can be placed vertically, as shown in Fig. 4. Through such an arrangement, not only can the arrangement space be used efficiently, but also the contact area between the switching elements (40) and the insulating sheet (30) can be increased, thereby improving the heat dissipation performance.

The type and arrangement of the switching element (40) may vary depending on the need, but in one embodiment of the present invention, a bridge diode (41), a PFC (Power Factor Correction) MOSFET (42), a PFC diode (43), a DC-DC MOSFET (44), and a DC-DC diode (45) are included. More specifically, the bridge diode (41) is attached on the first partition wall (21), the PFC MOSFET (42), the PFC diode (43), and the DC-DC MOSFET (44) are arranged on the third partition wall (23) that is arranged parallel to the first partition wall (21), and the DC-DC diode (45) is arranged on the second partition wall (22).

The passive component (50) includes components such as an inductor (51), a transformer (52), etc. At this time, the inductor (51) may be a PFC inductor. Referring to Fig. 5, the passive component (50) is placed in the first receiving portion (11), the inductor (51) is placed in the first-first receiving portion (111), and the transformer (52) is placed in the first-second receiving portion (112).

The filtering module (60) includes a circuit that receives and filters commercial AC voltage. The filtering module (60) is placed on one side of the first receiving portion (11), specifically, as shown in Fig. 6, it is placed in the second receiving portion (12).

The shielding cover (70) shields the filtering module (60). The shielding cover (70) covers the upper part of the filtering module (60) and is coupled to the second receiving portion (112) to improve the insulation of the battery charging device (1) for an electric vehicle according to one embodiment of the present invention.

The printed circuit board (80) is a board to which various circuit elements are combined, and is also combined with a passive element (50) after assembly. The printed circuit board (80) includes a circuit element that is accommodated in the third accommodation portion (113) of the accommodation space. That is, as shown in FIG. 7, in one embodiment of the present invention, the housing (10) includes the third accommodation portion (113), so that the printed circuit board (80) can be arranged to cover the upper portion of the accommodation space while being combined with the passive element (50) despite the circuit elements mounted on the board.

The housing cover (90) covers the upper part of the housing (10) and is connected to the housing (10). The housing cover (90) protects the components placed inside the housing (10) from impact, etc.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

1: Battery charging device for electric vehicle
10: Housing
20: Bulkhead
30: Insulating sheet
40: Switching element
50: Passive components
60: Filtering module
70: Shielding cover
80: Printed Circuit Board
90: Housing Cover

Claims (10)

A housing having a receiving space formed therein and having side walls;
A bulkhead forming a compartment within the above-mentioned accommodation space and positioned vertically with respect to the bottom surface of the housing;
Insulating sheet attached to the above bulkhead and
comprising a plurality of switching elements attached on the insulating sheet;
The above insulating sheet has adhesive properties, and the plurality of switching elements are attached onto the insulating sheet by the adhesive properties,
The above plurality of switching elements are arranged vertically with respect to the bottom surface of the housing,
The above bulkhead includes a first bulkhead that extends across the interior of the housing, a second bulkhead that meets vertically with the first bulkhead and extends to one side, and a third bulkhead that meets vertically with the second bulkhead and extends within the interior of the housing.
The first bulkhead, the second bulkhead, the third bulkhead and the side wall of the housing form a first receiving portion,
The above insulating sheet includes a first insulating sheet attached to the first bulkhead, a second insulating sheet attached to the second bulkhead, and a third insulating sheet attached to the third bulkhead.
An electric vehicle battery charging device, wherein some of the plurality of switching elements are attached to the first insulating sheet, other some of the plurality of switching elements are attached to the second insulating sheet, and still other some of the plurality of switching elements are attached to the third insulating sheet. delete delete In the first paragraph,
The above insulating sheet is a battery charging device for an electric vehicle having heat dissipation performance. delete In the first paragraph,
An electric vehicle battery charging device, wherein at least one passive element, such as an inductor or a transformer, is placed within the first receiving portion. In Article 6,
A battery charging device for an electric vehicle, wherein a second receiving section is formed on one side of the first receiving section, and a filtering module including a circuit for receiving and filtering commercial AC voltage is disposed thereon. In Article 7,
A battery charging device for an electric vehicle further comprising a shielding cover for shielding the above filtering module. In Article 8,
A battery charging device for an electric vehicle, wherein a third receiving area is formed in a portion of the receiving space other than the first receiving area and the second receiving area. In Article 9,
A battery charging device for an electric vehicle, wherein a printed circuit board including circuit elements accommodated in the third receiving portion is arranged to cover at least a portion of an upper portion of the receiving space.

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