High-power DC-DC converter

Abstract

The utility model relates to a high-power DC-DC converter. The high-power DC-DC converter comprises a shell and a circuit board arranged in the shell, the circuit board comprises a board body, a transformer module and a diode, the transformer module and the diode are arranged on the board body, a plurality of input MOS tubes and a plurality of output MOS tubes are arranged on the two sides of the board body in the length direction respectively, heat dissipation silicone grease sheets are arranged between the input MOS tubes and the shell, and fixing pieces used for fixing the input MOS tubes and the output MOS tubes are arranged between the output MOS tubes and the shell. And a plurality of heat dissipation toothed plates are arranged on the shell. The large-power heat dissipation requirement is met, and meanwhile the size is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of DC-DC converter, and particularly relates to a high-power DC-DC converter. BACKGROUND

[0002] DC-DC is a newly developed miniaturized power switch module, which is assembled by using microelectronic technology to integrate small surface mount integrated circuits and micro electronic components. The use of DC-DC power module is beneficial to simplify power circuit design, shorten development cycle, realize optimal indicators, and can be widely applied to various digital instruments and intelligent instruments. DC-DC power is widely used in vehicle power supply. For example, the vehicle power battery is used to supply low-voltage power to the low-voltage power system.

[0003] At present, the DC-DC converter on the market, such as patent announcement number: CN205178869U, discloses a DC-DC converter for electric vehicle, which comprises a bottom plate, a component plate is arranged on the bottom plate, a plurality of fans, a transformer module, a diode and a MOS tube are arranged on the component plate; a shell is arranged on the bottom plate, the transformer module, the diode and the MOS tube are located in the shell, and the fan is located outside the shell, and the special feature is that: the transformer module is located between the diode and the fan, a plurality of heat dissipation fins are arranged on the shell, and the plurality of heat dissipation fins and the air outlet end of the fan form a plurality of heat dissipation channels.

[0004] But in the actual use process, the above-mentioned converter is designed to actively dissipate heat by the heat dissipation fan, so that the overall design space is large, and therefore a small power exchange device with small space occupation and meeting the heat dissipation requirement is urgently needed. Content of the utility model

[0005] In order to solve the above technical problems, the present application provides a high-power DC-DC converter, which has the advantages of meeting the heat dissipation requirement of high power and small volume.

[0006] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0007] A high-power DC-DC converter, comprising a shell and a circuit board arranged in the shell;

[0008] The circuit board comprises a board body, a transformer module and a diode arranged on the board body, a plurality of input MOS tubes and output MOS tubes are arranged on the two sides of the length direction of the board body, respectively, a plurality of heat dissipation silicone grease sheets are arranged between the plurality of input MOS tubes and output MOS tubes and the shell, and a fixing piece is arranged for fixing the plurality of input MOS tubes and output MOS tubes; a plurality of heat dissipation tooth plates are arranged on the shell.

[0009] The input MOS tube and the output MOS tube on the circuit board are attached to the shell under the action of the fixing member, and then the heat generated by the two types of MOS tubes can be uniformly transferred to both sides of the U-shaped cover plate, thereby preventing the heat from being concentrated to cause the heat dissipation not in time, thereby ensuring the heat dissipation effect, and the setting of the heat dissipation silicone sheet can fill the gap between the MOS tube and the shell, thereby ensuring the heat transfer effect, thereby ensuring the heat dissipation effect, which can meet the heat dissipation demand of about 500W high power without the need to install active heat dissipation, thereby ensuring a small size.

[0010] As a preferred scheme of the present application, the fixing member comprises a U-shaped pressing plate, and a pressing screw is arranged between the U-shaped pressing plate and the shell, and the U-shaped pressing plate presses the input MOS tube or the output MOS tube on the shell under the action of the pressing screw.

[0011] The U-shaped pressing plate presses the input MOS tube or the output MOS tube on the shell under the action of the pressing screw, thereby ensuring the tightness of the MOS tube and the shell, thereby ensuring the heat dissipation effect, and the circuit board can be fixed to prevent loosening during use.

[0012] As a preferred scheme of the present application, the shell comprises a U-shaped cover plate, the U-shaped cover plate is provided with a cover at both ends, and the top of the U-shaped cover plate is provided with a bottom plate.

[0013] The above technical scheme is implemented to facilitate the operator to install and fix the circuit board in the shell.

[0014] As a preferred scheme of the present application, the U-shaped cover plate is provided with a positioning groove for inserting the plate body on the two inner side walls, and the positioning groove is provided with a guide surface at the top.

[0015] The above technical scheme is implemented to enable the plate body to be fixed in the positioning groove, and the gap between the plate body and the shell can prevent the heat on the shell from being transferred to other electronic components in the plate body, thereby ensuring the heat dissipation effect.

[0016] As a preferred scheme of the present application, the bottom plate is provided with a U-shaped mounting groove.

[0017] The above technical scheme is implemented to install the entire converter.

[0018] In summary, the present application has at least one of the following beneficial technical effects:

[0019] 1. The input MOS tube and the output MOS tube on the circuit board are attached to the shell under the action of the fixing part, and then the heat generated by the two types of MOS tubes can be uniformly transmitted to both sides of the U-shaped cover plate, thereby preventing the concentration of heat from causing the situation of delayed heat dissipation, thereby ensuring the heat dissipation effect, and the setting of the heat dissipation silicone sheet can fill the gap between the MOS tube and the shell, thereby ensuring the heat transfer effect, thereby ensuring the heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0022] Figure 2 is an exploded view of the embodiment of the present application.

[0023] Figure 3 is a side view of the inside of the shell of the embodiment of the present application.

[0024] Figure 4 is a schematic diagram of the internal structure of the shell of the embodiment of the present application.

[0025] Reference signs: 1, shell; 11, U-shaped cover plate; 12, cover; 13, bottom plate; 14, U-shaped mounting groove; 15, heat dissipation tooth piece; 16, positioning groove; 2, circuit board; 21, plate body; 22, transformer module; 23, diode; 24, input MOS tube; 25, output MOS tube; 26, heat dissipation silicone sheet; 3, fixing part; 31, U-shaped pressing plate. DETAILED DESCRIPTION

[0026] The following will be described in detail in combination with the drawings Figures 1-4 The present application will be further described in detail.

[0027] The embodiment of the present application discloses a high-power DC-DC converter. Referring to Figure 1 A high-power DC-DC converter: comprising a shell 1 and a circuit board 2 arranged in the shell 1.

[0028] Referring to Figures 1-2The shell 1 comprises a U-shaped cover plate 11, both ends of the U-shaped cover plate 11 are provided with a cover 12, and the top of the U-shaped cover plate 11 is provided with a bottom plate 13, so as to facilitate an operator to install and fix the circuit board 2 in the shell 1. A plurality of heat dissipation tooth plates are arranged on the three outer side walls of the U-shaped cover plate 11, so as to increase the heat dissipation area, so that the heat on the shell 1 can be quickly transferred to the surrounding air. The bottom plate 13 is provided with a U-shaped mounting groove 14 for mounting the entire converter.

[0029] With reference to Figures 2-4 The circuit board 2 comprises a plate body 21, a transformer module 22 and a diode 23 arranged on the plate body 21, a plurality of input MOS tubes 24 and output MOS tubes 25 are arranged on both sides of the plate body 21 in the length direction, respectively, and a plurality of heat dissipation silicone grease sheets 26 are arranged between the plurality of input MOS tubes 24 and output MOS tubes 25 and the shell 1, and a fixing piece 3 for fixing the plurality of input MOS tubes 24 and output MOS tubes 25, that is, the input MOS tubes 24 and output MOS tubes 25 on the circuit board 2 are attached to the shell 1 under the action of the fixing piece 3, so that the heat generated by the two types of MOS tubes can be uniformly transferred to both sides of the U-shaped cover plate 11, thereby preventing the occurrence of the situation that heat is not dissipated in time due to heat concentration, thereby ensuring the heat dissipation effect. At the same time, the arrangement of the heat dissipation silicone grease sheet 26 can fill the gap between the MOS tube and the shell 1, thereby ensuring the heat transfer effect, thereby ensuring the heat dissipation effect, thereby being able to meet the heat dissipation demand of about 500W high power without the need to add active heat dissipation, thereby ensuring a small size.

[0030] The fixing piece 3 comprises a U-shaped pressing plate 31, a pressing screw is arranged between the U-shaped pressing plate 31 and the shell 1, and the U-shaped pressing plate 31 is pressed against the shell 1 under the action of the pressing screw, so as to ensure the tightness of the MOS tube and the shell 1, thereby ensuring the heat dissipation effect, and the circuit board 2 can be fixed to prevent loosening during use.

[0031] Two inner side walls of the U-shaped cover plate 11 are provided with positioning grooves 16 for inserting the plate body 21, and the top of the positioning groove 16 is provided with a guide surface. Thus, the plate body 21 can be fixed in the positioning groove 16, and the gap between the plate body 21 and the shell 1 can prevent the heat on the shell 1 from being transferred to other electronic components in the plate body 21, thereby ensuring the heat dissipation effect.

[0032] The implementation principle of the high-power DC-DC converter of the embodiment of the application is that the input MOS tube 24 and the output MOS tube 25 on the circuit board 2 are respectively attached to the shell 1 under the action of the fixing member 3, and then the heat generated by the two types of MOS tubes can be uniformly transmitted to both sides of the U-shaped cover plate 11, thereby preventing the emergence of the situation that heat is not dissipated in time due to heat concentration, thereby ensuring the heat dissipation effect, and meanwhile the setting of the heat dissipation silicone grease sheet 26 can fill the gap between the MOS tube and the shell 1, thereby ensuring the heat transmission effect, thereby ensuring the heat dissipation effect.

[0033] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A high-power DC-DC converter, characterized in that: Includes a housing (1) and a circuit board (2) disposed within the housing (1); The circuit board (2) includes a board body (21), a transformer module (22) and a diode (23) disposed on the board body (21). Several input MOSFETs (24) and output MOSFETs (25) are respectively disposed on both sides of the board body (21) along its length. Thermal grease sheets (26) are disposed between the several input MOSFETs (24) and the output MOSFETs (25) and the housing (1). Fixing members (3) are used to fix the several input MOSFETs (24) and the output MOSFETs (25). Several heat dissipation toothed plates are disposed on the housing (1).

2. The high-power DC-DC converter according to claim 1, characterized in that: The fastener (3) includes a U-shaped pressure plate (31), and a clamping screw is provided between the U-shaped pressure plate (31) and the housing (1). Under the action of the clamping screw, the U-shaped pressure plate (31) presses the input MOS tube (24) or the output MOS tube (25) onto the housing (1).

3. The high-power DC-DC converter according to claim 1, characterized in that: The housing (1) includes a U-shaped cover plate (11), with caps (12) at both ends of the U-shaped cover plate (11) and a bottom plate (13) at the top of the U-shaped cover plate (11).

4. The high-power DC-DC converter according to claim 3, characterized in that: The U-shaped cover plate (11) has positioning grooves (16) on its two inner sidewalls for inserting the plate body (21), and the top of the positioning grooves (16) has a guide surface.

5. The high-power DC-DC converter according to claim 3, characterized in that: The base plate (13) is provided with a U-shaped mounting groove (14).

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