DC-DC converter with heat dissipation structure

Abstract

The utility model discloses a DC-DC converter with a heat radiation structure, comprising a box body assembly and a three-dimensional water channel circuit board assembly, the box body assembly comprises a box body and a water channel cover plate, the box body is internally provided with a cavity, the three-dimensional water channel circuit board assembly is installed in the cavity, the box body is provided with a cooling water channel below the cavity, and the cooling water channel is sealed by the water channel cover plate. The three-dimensional water channel is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the cooling water channel, the three-dimensional water channel circuit board assembly comprises a three-dimensional water channel and a circuit board assembly, a plurality of power devices of the circuit board assembly are installed on the three-dimensional water channel, and the three-dimensional water channel is provided with installation screw holes. The box body is provided with fixing holes corresponding to the mounting screw holes, screws penetrate into the fixing holes from the bottom of the box body, and the tails of the screws are screwed into the mounting screw holes and lock the three-dimensional water channel. When the three-dimensional water channel is fixed, only screws need to be installed at the bottom, the PCB of the circuit board assembly does not need to be reserved with avoiding holes, space is saved, and operation is simplified.

Description

Technical Field

[0001] The utility model relates to a DC-DC converter with a heat dissipation structure. Background Art

[0002] The DC-DC converter is one of the key components in the fuel cell system. Its function is to boost the electric energy generated by the electrochemical reaction inside the fuel cell module to the required stable voltage and provide it to the electrical equipment for use. With the development of technology, the power of DC-DC converters required by the market is getting higher and higher, but the size of DC-DC needs to be controlled as small as possible. In order to better dissipate the heat of the power devices on the circuit board assembly, most of the existing DC-DC converters are equipped with three-dimensional water channels. The specific structure is: including a box assembly and a three-dimensional water channel circuit board assembly, the three-dimensional water channel circuit board assembly includes a three-dimensional water channel and a circuit board assembly, the three-dimensional water channel is arranged next to the power device of the circuit board assembly, the box assembly includes a box and a water channel cover, a cavity is arranged in the box, the three-dimensional water channel circuit board assembly is installed in the cavity, the box is provided with a cooling water channel below the cavity, the water channel cover closes the cooling water channel, the three-dimensional water channel is provided with a water inlet and a water outlet, and the water inlet and the water outlet are respectively connected to the cooling water channel. When installing the existing DC-DC converter, the circuit board assembly is first installed on the three-dimensional water channel to form a three-dimensional water channel circuit board assembly, and then the three-dimensional water channel circuit board assembly is installed as a whole inside the box. A plurality of mounting posts are provided at the bottom of the cavity of the box, and screw holes are provided on the mounting posts. The three-dimensional mounting screw holes are installed in alignment with the screw holes and fastened with screws. However, for the DC-DC converter of this structure, since the screws must be driven from the three-dimensional water channel to the box from top to bottom, a plurality of avoidance holes must be opened on the circuit board assembly to perform the screw fastening operation, which will occupy the space for arranging the PCB board components of the circuit board assembly, thereby wasting the internal space of the box, and failing to achieve the design purpose of integration and miniaturization of the DC-DC converter. Utility Model Content

[0003] The utility model provides a DC-DC converter with a heat dissipation structure, which is used to solve the technical problem that the DC-DC converter in the prior art cannot be integrated and miniaturized because avoidance holes need to be opened on a PCB board.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The utility model aims to provide a DC-DC converter with a heat dissipation structure, comprising a box assembly and a three-dimensional water channel circuit board assembly, the box assembly comprising a box and a water channel cover plate, a cavity is arranged in the box, the three-dimensional water channel circuit board assembly is installed in the cavity, a cooling water channel is arranged below the cavity of the box, the water channel cover plate closes the cooling water channel, the three-dimensional water channel is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the cooling water channel, and is characterized in that: the three-dimensional water channel circuit board assembly comprises a three-dimensional water channel and a circuit board assembly, a plurality of power devices of the circuit board assembly are installed on the three-dimensional water channel, the three-dimensional water channel is provided with mounting screw holes, the box and the mounting screw holes are provided with fixing holes correspondingly, the screws penetrate into the fixing holes from the bottom of the box, the tails of the screws are screwed into the mounting screw holes and lock the three-dimensional water channel.

[0006] The box body has a plurality of partitions protruding in the cooling water channel, the partitions divide the cooling water channel into a plurality of branch water channels, and the fixing holes are arranged on the partitions.

[0007] The three-dimensional water channel described above has mounting platforms protruding from the periphery of the water inlet and the water outlet, and the mounting screw holes are arranged on the mounting platforms.

[0008] A sealing ring is installed at the bottom of the nut of the screw, and the sealing ring is pressed on the box body and seals the fixing hole.

[0009] The bottom surface of the nut of the screw is provided with an inner concave surface, and the sealing ring is compressed into the concave surface when the screw is tightened.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The DC-DC converter with heat dissipation structure comprises a box assembly and a three-dimensional water channel circuit board assembly, the three-dimensional water channel circuit board assembly comprises a three-dimensional water channel and a circuit board assembly, several power devices of the circuit board assembly are installed on the three-dimensional water channel, the box assembly comprises a box and a water channel cover plate, a cavity is provided in the box, the three-dimensional water channel circuit board assembly is installed in the cavity, a cooling water channel is provided below the cavity of the box, the water channel cover plate closes the cooling water channel, the three-dimensional water channel is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively connected with the cooling water channel, the three-dimensional water channel is provided with a mounting screw hole, the box and the mounting screw hole are provided with a fixing hole correspondingly, the screw is inserted into the fixing hole from the bottom of the box, the tail of the screw is screwed into the mounting screw hole and locks the three-dimensional water channel. When fixing the three-dimensional water channel, it is only necessary to install the screw at the bottom, and it is not necessary to operate from the top of the three-dimensional water channel circuit board assembly, and the PCB board of the circuit board assembly does not need to reserve a avoidance hole, which saves space, is conducive to the integration and miniaturization of DC-DC converters, and simplifies the operation and speeds up production efficiency.

[0012] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a DC-DC converter with a heat dissipation structure provided in an embodiment of the utility model;

[0014] Figure 2 An exploded diagram of a DC-DC converter with a heat dissipation structure;

[0015] Figure 3 It is a structural schematic diagram of a box assembly in a DC-DC converter with a heat dissipation structure;

[0016] Figure 4 It is a structural schematic diagram of another angle of the box assembly in the DC-DC converter with a heat dissipation structure;

[0017] Figure 5 It is a schematic diagram of the structure of the box in the DC-DC converter with a heat dissipation structure;

[0018] Figure 6 It is a schematic diagram of the structure of screws and sealing rings in a DC-DC converter with a heat dissipation structure;

[0019] Figure 7 is a cross-sectional view of the screw;

[0020] Figure 8 It is a schematic diagram of the structure of a three-dimensional water channel circuit board assembly in a DC-DC converter with a heat dissipation structure;

[0021] Fig. 9 It is a schematic diagram of the structure of the three-dimensional water channel in the DC-DC converter with heat dissipation structure. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 9As shown, the present embodiment provides a DC-DC converter with a heat dissipation structure, including a box assembly 1 and a three-dimensional water channel circuit board assembly 2, the box assembly 1 includes a box 11 and a water channel cover plate 12, a cavity 110 is provided in the box 11, the three-dimensional water channel circuit board assembly 2 is installed in the cavity 110, a cooling water channel 112 is provided below the cavity 110 of the box 11, the water channel cover plate 12 closes the cooling water channel 112, the three-dimensional water channel 22 is provided with a water inlet 222 and a water outlet 223, the water inlet 222 and the outlet 223 are provided. The water inlets 223 are respectively connected with the cooling water channel 112, and are characterized in that: the three-dimensional water channel circuit board assembly 2 includes a three-dimensional water channel 22 and a circuit board assembly 21, and several power devices of the circuit board assembly 21 are installed on the three-dimensional water channel 22, and the three-dimensional water channel 22 is provided with a mounting screw hole 221, and the box 11 is provided with a fixing hole 111 corresponding to the mounting screw hole 221, and the screw 31 is inserted into the fixing hole 111 from the bottom of the box 11, and the tail of the screw 31 is screwed into the mounting screw hole 221 and locks the three-dimensional water channel 22. Several power devices of the circuit board assembly 21 use the three-dimensional water channel 22 for heat dissipation, and do not need to be attached to the bottom wall of the cavity 110 (i.e., above the cooling water channel 112), so the layout is flexible and changeable.

[0024] For the DC-DC converter with the heat dissipation structure, when fixing the three-dimensional water channel 112, it is only necessary to install the screws 31 at the bottom of the box body 11, and there is no need to operate from above the three-dimensional water channel circuit board assembly 2. The PCB board of the circuit board assembly 21 does not need to reserve avoidance holes, which saves space, is conducive to the integration and miniaturization of the DC-DC converter, and simplifies the operation and speeds up the production efficiency.

[0025] The box 11 has a plurality of partitions 113 protruding from the cooling water channel 112. The partitions 113 divide the cooling water channel 112 into a plurality of water channels. The fixing holes 111 are arranged on the partitions 113. The partitions 113 can enhance the heat exchange effect of the cooling water channel 112 and facilitate the arrangement of the fixing holes 111.

[0026] The three-dimensional water channel 22 has a mounting platform 224 protruding from the water inlet 222 and the water outlet 223, and the mounting screw hole 221 is arranged on the mounting platform 224. The mounting platform 224 makes the installation of the three-dimensional water channel 22 more convenient, and the sealing between the water inlet 222, the water outlet 223 and the cooling water channel 112 is better.

[0027] A sealing ring 32 is installed at the bottom of the nut of the screw 31, and the sealing ring 32 is pressed on the box body 11 and seals the fixing hole 111. The screw 31 presses the sealing ring 32 to achieve a good sealing effect on the fixing hole 111.

[0028] The bottom surface of the nut of the screw 31 is provided with an inner concave surface 311, and when the screw 31 is tightened, the sealing ring 32 is compressed into the concave surface 311. The sealing ring 32 has a sealing effect on the fixing hole 111 and will not be damaged.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A DC-DC converter with a heat dissipation structure, comprising a box assembly (1) and a three-dimensional water channel circuit board assembly (2), the box assembly (1) comprising a box (11) and a water channel cover plate (12), a cavity (110) being provided in the box (11), the three-dimensional water channel circuit board assembly (2) being installed in the cavity (110), a cooling water channel (112) being provided below the cavity (110) of the box (11), the water channel cover plate (12) sealing the cooling water channel (112), the three-dimensional water channel (22) being provided with a water inlet (222) and a water outlet (223), the water inlet (222) and the water outlet (223) being respectively communicated with the cooling water channel (112), characterized in that: The three-dimensional water channel circuit board assembly (2) comprises a three-dimensional water channel (22) and a circuit board assembly (21). A plurality of power devices of the circuit board assembly (21) are mounted on the three-dimensional water channel (22). The three-dimensional water channel (22) is provided with a mounting screw hole (221). The box body (11) is provided with a fixing hole (111) corresponding to the mounting screw hole (221). The screw (31) is inserted into the fixing hole (111) from the bottom of the box body (11). The tail of the screw (31) is screwed into the mounting screw hole (221) and locks the three-dimensional water channel (22).

2. A DC-DC converter with a heat dissipation structure according to claim 1, characterized in that: The box body (11) has a plurality of partitions (113) protruding from the cooling water channel (112); the partitions (113) divide the cooling water channel (112) into a plurality of branch water channels; and the fixing holes (111) are arranged on the partitions (113).

3. A DC-DC converter with a heat dissipation structure according to claim 2, characterized in that: The three-dimensional water channel (22) has mounting platforms (224) protruding from the peripheries of the water inlet (222) and the water outlet (223), and the mounting screw holes (221) are arranged on the mounting platforms (224).

4. A DC-DC converter with a heat dissipation structure according to any one of claims 1 to 3, characterized in that: A sealing ring (32) is installed at the bottom of the nut of the screw (31), and the sealing ring (32) is pressed on the box body (11) and seals the fixing hole (111).

5. The DC-DC converter with a heat dissipation structure according to claim 4, characterized in that: The bottom surface of the nut of the screw (31) is provided with an inner concave surface (311), and the sealing ring (32) is compressed into the concave surface (311) when the screw (31) is tightened.

Images