Compact converter for electric vehicle

Abstract

The present invention relates to a compact converter for an electric vehicle, comprising: a base panel; a board unit including a power board, which is laid and mounted on the bottom surface of the base panel and has a plurality of female connectors, a control board, a capacitor board and a gate board each having a male connector connected to female connectors so as to be stood up on and connected to the power board, and a heat sink stood up on and fixed to the power board; a case which is digeut-shaped on a side surface thereof, and which has both end portions mounted on the base panel to accommodate the board unit; and a front surface part and a rear surface part mounted to close the front surface and the rear surface of the case, which is open, and thus various kinds of boards and the heat sink are stood up and provided and some boards are divided and manufactured to be short to enable a converter to be manufactured in a compact size, the upper surfaces of the boards and the heat sink are in contact with the upper surface of the case so that heat of the boards and the heat sink are dissipated through the case, thereby improving a heat dissipation effect, and a terminal block cover is provided on a terminal block so that the terminal block is protected from the outside.

Description

Compact converter for electric vehicles

[0001] The present invention relates to a converter for charging an electric vehicle, and more specifically, to a compact converter for an electric vehicle in which a terminal cover is mounted on a terminal block of a rear panel of a converter to protect the terminal block, a three-dimensional bus bar is manufactured and arranged, the height of each built-in board is limited and divided, and the inner upper surface of the case is manufactured to touch or be close to the upper surface of the boards, thereby reducing the overall size of the converter.

[0002]

[0003] Typically, electric vehicles, including AGVs (Automated Guided Vehicles) or AMRs (Automated Mobile Robots), are charged through electrode contact. However, this method can lead to misalignment of the electrodes and the potential for them to float, generating heat in the area and potentially even leading to fire. To prevent this, wireless charging systems are increasingly being adopted. These wireless charging systems offer superior safety and convenience, as charging begins simply by bringing the electric vehicle's receiving coil pad close to the charging station's transmitting coil pad.

[0004] These wireless charging systems can be configured so that the current output from the transmission inverter is received by the receiving converter and then charged into the battery. Briefly, this power structure is as follows: First, external AC (alternating current) is input into the transmission inverter, converted into DC (direct current), and then converted back into AC (alternating current) and output in the form of a magnetic field through the transmission coil pad. Then, the DC is received by the receiving coil pad located close to the transmission coil pad, and passes through the receiving converter, rectifying circuit, DC / DC converter, smoothing and filter circuit, and output so that the battery can be charged.

[0005] Meanwhile, as shown in Fig. 1, a battery (10), a water converter (11) and a water coil pad (12) can be mounted on an electric vehicle, and a power transmission inverter (20) and a power transmission coil pad (21) can be installed on a charging station.

[0006] Therefore, when the water coil pad (12) is positioned close to the transmission coil pad (21), the water converter (11) and the transmission inverter (20) are connected so that the battery (10) can be charged.

[0007] Here, to briefly explain the power converter (11), the power converter (11) is a power converter installed inside the AMR. This power converter (11) can be configured to convert the received AC (alternating current) into a pulsating current by passing through a built-in capacitor bank and a rectifier circuit, and then pass it through a power board that functions as a DC / DC converter, and then turn the relay ON / OFF by a control board, and then charge the battery (10) through an output terminal after passing it through a noise filter.

[0008] These power converters (hereinafter collectively referred to as "converters") handle electricity and are therefore highly sensitive to safety, necessitating their manufacture. Furthermore, because they are installed inside a vehicle, they must be vibration-resistant and miniaturized to maximize the use of limited interior space.

[0009]

[0010] The present invention, which has been proposed to solve the above-mentioned needs, provides a compact converter for an electric vehicle in which a terminal block cover is mounted on a terminal block on a rear panel of a converter, a plurality of boards are arranged in an upright manner, a long board is divided into two or more parts, a three-dimensional bus bar is manufactured and arranged, and the inner upper surface of the case is manufactured to touch or be close to the upper surface of the boards, thereby protecting the terminal block exposed to the outside and reducing the overall size of the converter to maximize the use of the installation space.

[0011]

[0012] In order to achieve the above-described purpose, a small converter for an electric vehicle according to the present invention may include a board portion including a base panel; a power board that is installed so as to lie down on the bottom surface of the base panel and has a plurality of female connectors installed; a control board, a capacitor board, and a gate board each having a male connector connected to the female connector so as to be connected to the power board while standing upright; and a heat sink that is fixed while standing upright on the power board; a case that has a 'ㄷ' shape in the side view and has both ends mounted to the base panel to accommodate the board portion; a front portion and a rear portion that are installed so as to close the front and rear of the open case.

[0013] Here, the case is manufactured with a low height that touches or is close to the upper surface of the control board, capacitor board, gate board, and heat sink, thereby directly receiving and cooling the heat generated by the control board, capacitor board, gate board, and heat sink, preventing disconnection between the female connector and the male connector, and allowing the case to be manufactured in a compact form with a low height.

[0014] Additionally, the control board, capacitor board, and gate board may be additionally provided with a hook-type fastening bracket. Here, the fastening bracket is arranged to connect the control board, capacitor board, and gate board to the power board, respectively, and can be mutually fixed.

[0015] Additionally, the capacitor board can be manufactured by arranging multiple capacitors diagonally to reduce the height when connected to the power board.

[0016] Additionally, the heat sink may be additionally equipped with an insulating sheet and a fixing bracket. Here, the heat-conducting sheet is attached to the heat sink, and the fixing bracket fixed to the heat sink can press the diode and FET placed on the insulating sheet to adhere them to the heat sink.

[0017] Additionally, the heatsink may be fastened to the case by a fastening member having a top surface that touches or is close to the inner top surface of the case and penetrates a number of fastening holes machined into the case at regular intervals.

[0018] Additionally, the case may further include a joining groove formed on the outer surface of the case to accommodate the joining grooves in order to cover a plurality of joining holes and joining members from the outside, and a covering panel joined to the joining groove.

[0019] Additionally, the case may be provided with additionally machined catch grooves on the lower portions of both sides, and the base panel may be provided with additionally machined catch protrusions on the edges corresponding to the catch grooves. Accordingly, the catch grooves and catch protrusions may be engaged to engage the case and the base panel.

[0020] Additionally, the case may further include a number of heat dissipation fin zones machined for heat dissipation on the inner and outer surfaces, or only on the inner surface.

[0021] Additionally, the front portion may include a front panel installed to block the open front of the case, an MMI board mounted on a portion of the front panel, and a first fan module mounted on the remaining portion of the front panel.

[0022] Additionally, the rear portion may include a rear panel installed to block the open rear of the case, a terminal block mounted on a portion of the rear panel, and a second fan module mounted on the remaining portion of the rear panel.

[0023] Here, the first fan module, the second fan module, and the heat sink can be positioned in a straight line.

[0024] Additionally, the rear portion may further include a rear panel installed to block the open rear of the case, a terminal block mounted on a portion of the rear panel, and first and second bus bars installed to connect the terminal block and the power board. Here, the first and second bus bars may be manufactured in a three-dimensional shape having at least two horizontal portions and two vertical portions.

[0025] Additionally, the first bus bar may include a first-first horizontal portion extending forward and connected to a terminal block, a first vertical portion bent downward from the first-first horizontal portion, a first-second horizontal portion bent rightward from the first vertical portion, and a first-third horizontal portion bent forward from the first-second horizontal portion.

[0026] Additionally, the second bus bar may include a second-first horizontal portion extending forward and connected to a terminal block, a second vertical portion bent downward from the second-first horizontal portion, a second-second horizontal portion bent rightward from the second vertical portion, and a second-third horizontal portion bent forward from the second-second horizontal portion.

[0027] In order to avoid interference between the first bus bar and the second bus bar when installed, the first-first horizontal section may be manufactured so that the first vertical section is longer than the second-first horizontal section, the first-second horizontal section is shorter than the second vertical section, the first-third horizontal section is longer than the second-second horizontal section, and the first-third horizontal section is shorter than the second-third horizontal section.

[0028] Additionally, the rear part may further include a rear panel installed to block the open rear of the case, and a UI board mounted on the rear panel. Here, the UI board is manufactured separately into a UI main board and a UI expansion board, which can be interconnected, to enable the case to be manufactured in a compact size by reducing its length.

[0029] Additionally, the rear portion may further include a rear panel installed to block the open rear of the case, and a terminal cover mounted to be fixed to the rear panel and covering the terminal block.

[0030] Additionally, it may further include a clip fixed to the rear panel to secure the cable tie that bundles the wires connected to the terminal block.

[0031] Additionally, the front panel and the rear panel may further include a horizontal flange and a vertical flange formed by bending outwardly two sides of the horizontal and vertical edges of the edges. Here, the horizontal flanges of the front panel and the rear panel may be used for horizontal installation while the case and the base panel are connected, and the vertical flanges of the front panel and the rear panel may be used for vertical installation.

[0032]

[0033] As described above, according to the present invention, by mounting a terminal cover on the terminal block of the back panel of the converter, the terminal block exposed to the outside can be protected.

[0034] In addition, since a number of boards are arranged in a counted manner, the upper surfaces of the boards arranged in a standing manner are arranged so that they touch or are close to the upper surface of the case, long boards are manufactured by dividing them into two or more pieces, and three-dimensional bus bars are manufactured and arranged, the overall size of the converter is reduced, maximizing space utilization, making it resistant to vibration, improving sturdiness and durability, saving assembly time, improving production efficiency, and reducing manufacturing costs.

[0035] And, a number of heat dissipation fin sections are formed on the inside of the case, the diode and FET are in close contact with the heat sink, the upper surface of the heat sink is placed in contact with or close to the upper surface of the case, and the heat sink and the first fan module and the second fan module are positioned in a straight line, so that heat dissipation is performed through the entire surface of the case, the diode and FET, which generate a lot of heat, are in direct contact with the heat sink to achieve effective heat dissipation, and the internal heat is quickly discharged to maximize cooling efficiency.

[0036]

[0037] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0038] Figure 1 is a schematic diagram illustrating a conventional wireless charging system for an electric vehicle.

[0039] FIG. 2 is a perspective view schematically illustrating a compact converter for an electric vehicle according to a preferred embodiment of the present invention.

[0040] Figure 3 is an exploded perspective view of Figure 2.

[0041] Fig. 4 is a perspective view showing the case removed from Fig. 3.

[0042] Figure 5 is a drawing showing the state of the case and the bottom panel before and after assembly in Figure 3.

[0043] Figure 6 is a drawing showing the state of the heat sink shown in Figure 4 before and after assembly.

[0044] Fig. 7 is an enlarged view of the capacitor board illustrated in Fig. 4.

[0045] Figure 8 is an enlarged view of the UI board illustrated in Figure 4.

[0046] Figure 9 is an enlarged view showing the first and second bus bars illustrated in Figure 4.

[0047] Fig. 10 is a perspective view showing the state of the terminal block and terminal block cover of the rear panel in Fig. 3 before and after assembly.

[0048] Figure 11 is a drawing showing a state in which the converter of Figure 2 is installed horizontally or vertically.

[0049]

[0050] Hereinafter, with reference to the attached drawings, preferred embodiments are described in detail so that those skilled in the art can easily practice the present invention. Furthermore, among the components mentioned in the various embodiments, similar and related components may be replaced, exchanged, or added to each embodiment. However, when describing the operating principles of preferred embodiments of the present invention in detail, if a specific description of a related known function or component is judged to unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

[0051]

[0052] A compact converter for an electric vehicle according to a preferred embodiment of the present invention may include a case portion (100), a board portion (200), a front portion (300), and a rear portion (400), as shown in FIGS. 2 and 3.

[0053] First, the case part (100) may include a base panel (110) and a case (120) as shown in FIGS. 2 and 3.

[0054] Here, the base panel (110) has a flat shape, and a board portion (200) can be installed on the upper side. This base panel (110) can include a hook (111, see FIG. 5) processed along the length of both edges for connection with the case (120). These hooks (111) can be installed in multiple numbers at regular intervals.

[0055] And the case (120) may have a roughly 'ㄷ' shape with the front and back sides open. This case (120) may include a catching groove (121) processed along the length of the edge on both ends, see Fig. 5). At this time, the catching grooves (121) may be installed at a certain interval in multiple places so as to be fastened with the catching projections (111). Due to this, the assembly process of the case (120) and the base panel (110) can be performed simply and in a short time. In addition, the case (120) may be fastened by having both ends bent to be in close contact with the base panel (110) and then fastened with screws or bolts.

[0056] In addition, the case (120) may include a plurality of heat dissipation fin areas (122) machined on the inner surface as shown in FIG. 5, a plurality of machined fastening holes (124) for fastening with a heat sink (250) through a penetrating fastening member (123), and a covering panel (125, see FIGS. 3 and 5) attached or coupled to the case (120) while covering the fastening holes (124) to prevent exposure of the fastening holes (124). Here, the fastening member (123) may be made of a material with strong heat conductivity, and may be, for example, a screw or, more particularly, a socket head screw. In addition, the covering panel (125) may be, for example, a coupling groove (126) machined on the case (120) for coupling, and both ends of the covering panel (125) may be hooked and coupled to the coupling groove (126).

[0057] In addition, when the case (120) is connected to the base panel (110), it can be manufactured at a height such that the upper surfaces of a plurality of boards and heat sinks (250) that are erected and placed on the power board (210) in the board section (200) touch or are in close proximity to each other. Accordingly, the case (120) not only directly receives heat from a plurality of boards and heat sinks (250) that are in contact with or are in close proximity to each other and immediately dissipates heat, but in particular, it additionally receives heat from the heat sink (250) through the connecting member (123) connected to the heat sink (250) and immediately dissipates heat, and can efficiently dissipate internal heat through a plurality of heat dissipation fin sections (122).

[0058] Next, the board part (200) may include a power board (210), a control board (220), a capacitor board (230), a gate board (240), and a heat sink (250), as shown in FIGS. 4 and 5. Here, the board part (200) is simply classified according to the installation location, and in addition to these, there is an MMI board (320) and a UI board (460), but these are also described as being included in the front part (300) and the rear part (400) according to the installation location. In addition, since the functions of the power board (210), the control board (220), the capacitor board (230), the gate board (240), the MMI board (320), and the UI board (460) are the same as or similar to those of the prior art, a detailed description thereof will be omitted, and only contents related to the features of the present invention will be mentioned.

[0059] Here, the power board (210) is mounted on the base panel (110), and the control board (220), capacitor board (230), gate board (240), and heat sink (250) can be installed in a vertical position on the power board (210). The control board (220), capacitor board (230), and gate board (240) can each be provided with a male connector (C1), and the power board (210) can be provided with a female connector (C2). Therefore, the control board (220), capacitor board (230), and gate board (240) can be connected to the power board (210) by mutually connecting the male connector (C1) and the female connector (C2) while they are in an erected state. In addition, the male connector (C1) and the female connector (C2) can be installed by being interchangeable with each other.

[0060] In addition, the control board (220), the capacitor board (230), and the gate board (240) may additionally be provided with an 'ㄱ'-shaped angle-type fastening bracket (B1). Accordingly, the control board (220), the capacitor board (230), and the gate board (240) can be firmly fixed to the power board (210) via the fastening bracket (B1) in addition to being pressed and fixed by the case (120). In addition, since the upper portions of the control board (220), the capacitor board (230), the gate board (240), and the heat sink (250) are arranged to touch or be close to the inner upper surface of the case (120), they can be pressed by the case (120), so that they can be firmly fixed even in the event of external vibration or shock.

[0061] In addition, as shown in FIGS. 5 and 6, a heat sink (250) is arranged so that a diode generating a lot of heat and an FET (260, Field Effect Transistor) (hereinafter collectively referred to as 'FET') are in contact, and the FET (260) can be installed by being pressed and fixed to the heat sink (250) by an 'L'-shaped angle-shaped fixing bracket (B2). Referring to FIG. 6 for more detail, an insulating paper (251) is attached to the heat sink (250), and the FET (260) is placed on the insulating paper (251), and then can be fixed to the heat sink (250) by the fixing bracket (B2). As a result, the high heat generation of the FET (260) is directly transferred to the heat sink (250), so that the cooling effect can be maximized. In addition, the fixed bracket (B2) may be fixed to the heat sink (250) by a penetrating fastening member, or may be in a panel shape other than a hook shape.

[0062] In addition, in order to lower the height of the converter itself according to the present invention, as shown in FIG. 7, the capacitor board (230) can be manufactured by arranging the capacitor (232) attached to the substrate (231) at an angle. As a result, the height of the case (120) is lowered, and the height of the entire converter is lowered, making it easy to arrange and install in a narrow space.

[0063] Next, the front part (300) may include a front panel (310) installed to block the open front when the base panel (110) and the case (120) are combined, as shown in FIGS. 3 and 4, an MMI board (320) equipped with operation switches and a display, etc., mounted on a portion of the front panel (310), and a first fan module (330) mounted on the remaining portion of the front panel (310).

[0064] Here, the front panel (310) may be provided with a horizontal flange (F1) and a vertical flange (F2) formed by bending outward two of the four horizontal and vertical edges as shown in FIG. 4.

[0065] Additionally, the first fan module (330) may be installed to discharge heat from the inside of the case (100) to the outside. This first fan module (330) may be positioned in a straight line with the heat sink (250) and the second fan module (450) described below. This has the effect of quickly discharging the heat from the inside.

[0066] Finally, the rear part (400) may include a rear panel (410) installed to block the open rear when the base panel (110) and the case (120) are combined, a terminal block (420) mounted on a portion of the rear panel, a terminal block cover (430) mounted to cover the terminal block (420) to protect it from external exposure, a clip (440) to which a cable tie (T) that binds wires (L) is fixed while being fixed to the rear panel (410), a second fan module (450) mounted on the remaining portion of the rear panel (410), a UI board (460), and first and second bus bars (470, 480).

[0067] Here, the rear panel (410) may be provided with a horizontal flange (F1) and a vertical flange (F2) formed by bending outward two of the four horizontal and vertical edges as shown in FIGS. 4 and 11.

[0068] In addition, as shown in FIGS. 3 and 10, the terminal cover (430) can be installed to cover the terminal block (420) to which the wire (L) is connected, to prevent external exposure and protect it from impact, etc. This terminal block cover (430) has an approximate 'ㄷ' shape, and can include a vertical portion (431) fixed to the rear panel (410) on the side, a horizontal portion (432) extending from the vertical portion (431) to cover the terminal block (420), and an inclined portion (433) extending from the horizontal portion (432) to cover a portion of the wire (L). This shape of the terminal block cover (430) is an example, and thus, it can be manufactured in various other shapes that can cover the terminal block (430).

[0069] Additionally, the clip (440) is fixed to the rear panel (410), and a cable tie (T) that neatly bundles together a number of wires (L) connected to the terminal block (420) can be fixed.

[0070] In addition, the second fan module (450) may be installed to supply external cool air into the case (100). This second fan module (450) may be positioned in a straight line with the heat sink (250) and the first fan module (330), thereby allowing internal heat to be quickly discharged. At this time, the first and second fan modules (330, 450) may be installed interchangeably as needed.

[0071] In addition, the UI board (460) can be manufactured by dividing it into a UI main board (461) and a UI expansion board (462), as shown in FIGS. 3 and 8. This UI board (460) is conventionally manufactured as a single long piece, but in order to reduce the length and height of the converter itself, it can be manufactured by dividing it into a UI main board (461) and a UI expansion board (462), and arranging them front to back so that they are mutually connected through a male connector (C1) and a female connector (C2).

[0072] And the first and second bus bars (470, 480) can be installed by connecting the terminal block (420) of the rear part (400) and the power board (210). As shown in FIGS. 4 and 9, the first and second bus bars (470, 480) can be manufactured in a three-dimensional shape to reduce the length of the converter itself. In addition, the first bus bar (470) and the second bus bar (480) have slight differences in their shapes so that they do not contact each other when installed to avoid interference between each other. These first and second bus bars (470, 480) will be described in detail with reference to FIG. 9.

[0073] The first bus bar (470) may include a first-first horizontal portion (471) extending forward and connected to a terminal block (420), a first vertical portion (472) bent downward from the first-first horizontal portion (471), a first-second horizontal portion (473) bent rightward from the first vertical portion (472), and a first-third horizontal portion (474) bent forward from the first-second horizontal portion (473).

[0074] The second bus bar (480) may include a second-first horizontal portion (481) extending forward and connected to a terminal block (420), a second vertical portion (482) bent downward from the second-first horizontal portion (481), a second-second horizontal portion (483) bent rightward from the second vertical portion (482), and a second-third horizontal portion (484) bent forward from the second-second horizontal portion (483).

[0075] Here, in order to avoid interference between the first bus bar (470) and the second bus bar (480) when installed as in FIG. 4, the first-first horizontal portion (471) may be longer than the second-first horizontal portion (481), the first vertical portion (472) may be shorter than the second vertical portion (482), the first-second horizontal portion (473) may be longer than the second-second horizontal portion (483), and the first-third horizontal portion (474) may be shorter than the second-third horizontal portion (484).

[0076] Meanwhile, the above-mentioned converter can be installed horizontally using a horizontal flange (F1) formed on the front panel (310) and the rear panel (410), as shown in Fig. 11, or can be installed vertically using a vertical flange (F2).

[0077]

[0078] As described above, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering its technical spirit or essential characteristics. Therefore, the above-described embodiments should be understood as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims below rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included within the scope of the present invention.

[0079]

[0080] [Explanation of symbols]

[0081] 100: Case Department

[0082] 110: Base panel 111: Hook

[0083] 120: Case 121: Hanging groove

[0084] 122 Radiating fin area 123: Fastening member

[0085] 124: Fastening hole 125: Cover panel

[0086] 126:Combination home.

[0087] 200: Board

[0088] 210: Power board 220: Control board

[0089] 230: Capacitor board 231: Circuit board

[0090] 232: Capacitor 240: Gate board

[0091] 250: Heat sink 251: Insulating paper

[0092] 260:Diodes and FETs.

[0093] 300: Front

[0094] 310: Front panel 320: MMI board

[0095] 330: First fan module.

[0096] 400: Rear

[0097] 410: Rear panel 420: Terminal block

[0098] 430: Terminal cover 431: Vertical section

[0099] 432: Horizontal section 433: Sloped section

[0100] 440: Clip 450: Second fan module

[0101] 460:UI Board 461:UI Main Board

[0102] 462: UI expansion board 470: 1st bus bar

[0103] 471: 1st horizontal section 472: 1st vertical section

[0104] 473: 1st-2nd horizontal section 474: 1st-3rd horizontal section

[0105] 480: 2nd bus bar 481: 2nd-1 vertical section

[0106] 482: Second vertical section 483: Second-second horizontal section

[0107] 484: 2nd-3rd horizontal section.

[0108] B1: Fastening bracket B2: Fixed bracket

[0109] C1: Male connector C2: Female connector

[0110] F1: Horizontal flange F2: Vertical flange

[0111] L: Wire T: Cable tie.

Claims

1. Base panel (110); A board portion (200) including a power board (210) installed by lying down on the bottom surface of the base panel (110) and having a plurality of female connectors (C2) installed thereon, a control board (220) and a capacitor board (230) and a gate board (240) each having a male connector (C1) connected to the female connector (C2) so as to be connected by being erected on the power board (210), and a heat sink (250) fixed by being erected on the power board (210); A case (120) having a 'ㄷ' shape on the side and having both ends mounted on the base panel (110) to accommodate a board portion (200); It includes a front part (300) and a rear part (400) which are mounted to close the front and rear of the open case (120); The case (120) is manufactured to have a low height that touches or is close to the upper surface of the control board (220), the capacitor board (230), the gate board (240), and the heat sink (250), thereby directly receiving and cooling the heat generated by the control board (220), the capacitor board (230), the gate board (240), and the heat sink (250), and preventing disconnection between the female connector (C2) and the male connector (C1), and is manufactured to have a low height and small size.

2. In claim 1, The above control board (220), capacitor board (230) and gate board (240) are additionally provided with a hook-type fastening bracket (B1). The above fastening bracket (B1) is a small converter for an electric vehicle, which is arranged to connect the control board (220), capacitor board (230), and gate board (240) to the power board (210) and fix them to each other.

3. In claim 1 or 2, The above capacitor board (230) is a small converter for an electric vehicle manufactured by arranging a plurality of capacitors (232) diagonally to reduce the height while being connected to a power board (210).

4. In claim 1, The above heat sink (250) is additionally provided with an insulating paper (251) and a fixing bracket (B2). A small converter for an electric vehicle, in which an insulating paper (251) is attached to the heat sink (250), and a fixing bracket (B2) fixed to the heat sink (250) presses a diode and FET (260) placed on the insulating paper (251) to make them adhere to the heat sink (250).

5. In claim 1 or 4, The above heat sink (250) is a small converter for an electric vehicle, which is fastened to the case (120) by a fastening member (123) that penetrates a plurality of fastening holes (124) machined at regular intervals in the case (120) so that the upper surface thereof touches or is close to the inner upper surface of the case (120).

6. In claim 5, The case (120) is a compact converter for an electric vehicle, which further includes a coupling groove (126) formed on the outer surface of the case (120) to accommodate the coupling groove (124) in order to cover a plurality of coupling holes (124) and coupling members (123) from the outside, and a covering panel (125) coupled to the coupling groove (126).

7. In claim 1, The above case (120) is additionally provided with a processing catch groove (121) on the lower part of both sides, The above base panel (110) additionally has a hook projection (111) processed on the edge corresponding to the hook groove (121), A small converter for an electric vehicle in which the above-mentioned catch groove (121) and catch projection (111) are caught and connected so that the case (120) is connected to the base panel (110).

8. In claim 1, The above case (120) is a compact converter for an electric vehicle that further includes a plurality of heat dissipation fin areas (122) processed for heat dissipation on the inner and outer surfaces or only on the inner surface.

9. In claim 1, The front part (300) includes a front panel (310) installed to block the open front of the case (120), an MMI board (320) mounted on a part of the front panel (310), and a first fan module (330) mounted on the remaining part of the front panel (310). The rear part (400) includes a rear panel (410) installed to block the open rear of the case (120), a terminal block (420) mounted on a portion of the rear panel (410), and a second fan module (450) mounted on the remaining portion of the rear panel (410). A small converter for an electric vehicle in which the first fan module (330), the second fan module (450), and the heat sink (250) are positioned in a straight line.

10. In claim 1, The above rear part (400) further includes a rear panel (410) installed to block the open rear of the case (120), a terminal block (420) mounted on a part of the rear panel (410), and first and second bus bars (470, 480) installed to connect the terminal block (420) and the power board (210). A small converter for an electric vehicle, wherein the first and second bus bars (470, 480) are manufactured in a three-dimensional shape having at least two horizontal and vertical sections.

11. In claim 10, The above first bus bar (470) includes a first-first horizontal portion (471) extending forward and connected to a terminal block (420), a first vertical portion (472) bent downward from the first-first horizontal portion (471), a first-second horizontal portion (473) bent rightward from the first vertical portion (472), and a first-third horizontal portion (474) bent forward from the first-second horizontal portion (473). The above second bus bar (480) includes a second-first horizontal portion (481) extending forward and connected to a terminal block (420), a second vertical portion (482) bent downward from the second-first horizontal portion (481), a second-second horizontal portion (483) bent rightward from the second vertical portion (482), and a second-third horizontal portion (484) bent forward from the second-second horizontal portion (483). A compact converter for an electric vehicle, wherein the first bus bar (470) and the second bus bar (480) are manufactured such that the first-first horizontal portion (471) is longer than the second-first horizontal portion (481), the first vertical portion (472) is shorter than the second vertical portion (482), the first-second horizontal portion (473) is longer than the second-second horizontal portion (483), and the first-third horizontal portion (474) is shorter than the second-third horizontal portion (484) to avoid interference between them when installed.

12. In claim 1, The above rear part (400) further includes a rear panel (410) installed to block the open rear of the case (120), and a UI board (460) mounted on the rear panel (410). The above UI board (460) is a small converter for electric vehicles that is manufactured by dividing it into a UI main board (461) and a UI expansion board (462) and interconnecting them to enable manufacturing a small case (120) by reducing the length.

13. In claim 1, A small converter for an electric vehicle, wherein the rear part (400) further includes a rear panel (410) installed to block the open rear of the case (120), and a terminal cover (430) mounted to be fixed to the rear panel (410) and to cover the terminal block (420).

14. In claim 9, A compact converter for an electric vehicle further comprising a clip (440) fixed to the rear panel (410) to secure a cable tie (T) that bundles wires (L) connected to the terminal block (420).

15. In claim 9, The above front panel (310) and rear panel (410) further include a horizontal flange (F1) and a vertical flange (F2) formed by bending outwardly two horizontal and vertical edges of the edges, A compact converter for an electric vehicle, which uses horizontal flanges (F1) of the front panel (310) and the rear panel (410) to install horizontally while the case (120) and the base panel (110) are connected, and uses vertical flanges (F2) of the front panel (310) and the rear panel (410) to install vertically.

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