Top heat dissipation structure of vehicle-mounted charger

Abstract

The utility model relates to the technical field of heat dissipation of vehicle-mounted chargers, and discloses a top heat dissipation structure of a vehicle-mounted charger, which comprises a PCB (Printed Circuit Board); the MOS tube is horizontally connected to the bottom surface of the PCB; the cooling water channel is provided with a water inlet and a water outlet, a circulating water channel for communicating the water inlet with the water outlet is horizontally arranged in the cooling water channel, the cooling water channel is horizontally arranged below the MOS tube, and the top surface of the cooling water channel is in surface contact with the MOS tube. According to the vehicle-mounted charger top heat dissipation structure provided by the utility model, a plane cooling water channel structure is adopted, so that the size of a product is ensured in a limited space, and meanwhile, the heat dissipation requirement of the product is met; the internal space utilization rate of the product is improved, the power density of the product in unit space is improved, and the assembly process is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle charger heat dissipation technical field, more specifically, relate to a vehicle charger top heat dissipation structure. BACKGROUND

[0002] MOS tube as modern electronic equipment use frequency higher new type electron device, is widely used in various electronic circuits, is the important electronic components in vehicle charger, MOS tube under high power or high frequency operating conditions can produce a large amount of heat, if not in time, it can lead to device performance decline even damage, MOS tube heat dissipation is to ensure its stable operation and prolong the service life of the key factor.

[0003] The existing MOS tube is welded to the PCB board in a vertical manner, then the heat is transferred to the water channel through the pressing block to dissipate heat after being pressed tightly, this mode can reduce the space utilization rate, and a large amount of space is left in the internal space, meanwhile, the types and quantities of materials are increased, and the assembly process is increased, which can seriously affect the weight reduction of the whole machine. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a vehicle charger top heat dissipation structure to solve the problems in the above background technology.

[0005] To solve the above technical problems, the utility model is realized by adopting the following technical scheme:

[0006] A vehicle charger top heat dissipation structure comprises:

[0007] A PCB board 100;

[0008] A MOS tube 200 is horizontally connected to the bottom surface of the PCB board 100;

[0009] A cooling water channel 300 is provided with a water inlet 310 and a water outlet 320, and a circulating water channel is horizontally arranged in the cooling water channel 300 to connect the water inlet 310 and the water outlet 320, the cooling water channel 300 is horizontally arranged below the MOS tube 200, and the top surface of the cooling water channel 300 is in contact with the MOS tube 200.

[0010] Further, a heat-conducting gel 400 is arranged between the MOS tube 200 and the top surface of the cooling water channel 300.

[0011] Further, the heat-conducting gel 400 has two layers.

[0012] Further, a ceramic gasket 500 is arranged between the two layers of the heat-conducting gel 400.

[0013] Compared with the prior art, the vehicle-mounted charger top heat dissipation structure has the beneficial effects that:

[0014] The vehicle-mounted charger top heat dissipation structure has the beneficial effects that: the plane cooling water channel structure is adopted, the plane cooling water channel structure is in contact with the MOS tube plane, the heat dissipation area is increased, the product size is ensured in the limited space, the heat dissipation requirement of the product is met, the product internal space utilization is improved, the power density in the unit space of the product is improved, and the assembly process is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0015] The vehicle-mounted charger top heat dissipation structure will be further described below with reference to the drawings:

[0016] Figure 1 FIG. 1 is a structural schematic view of a vehicle-mounted charger top heat dissipation structure according to an embodiment of the present application;

[0017] Figure 2 FIG. 3 is a structural schematic view of a MOS tube according to an embodiment of the present application;

[0018] Figure 3 FIG. 4 is a structural schematic view of a vehicle-mounted charger according to an embodiment of the present application;

[0019] Figure 4 FIG. 5 is an assembly schematic view of a vehicle-mounted charger according to an embodiment of the present application;

[0020] Figure 5 FIG. 6 is a sectional view of a vehicle-mounted charger according to an embodiment of the present application;

[0021] 100.PCB board;

[0022] 200.MOS tube, 210.heat dissipation surface;

[0023] 300.cooling water channel, 310.water inlet, 320.water outlet, 330.top surface;

[0024] 400.heat-conducting gel;

[0025] 500.ceramic gasket;

[0026] 600.housing, 610.HVDC connector, 620.HVAC connector;

[0027] 700.upper cover plate;

[0028] 800.lower cover plate;

[0029] 900.EMI plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] Referring to Figures 1 to 5 The utility model provides a vehicle charger top heat dissipation structure, include: PCB board 100, MOS tube 200, cooling water channel 300.

[0032] The PCB board 100 is a variety of electronic components welding board.

[0033] The MOS tube 200 is packaged into the MOS tube with the heat dissipation surface 210 at the top, and the MOS tube 200 is horizontally welded to the bottom surface of the PCB board 100.

[0034] The cooling water channel 300 is provided with a water inlet 310 and a water outlet 320, and a circulating water channel is horizontally arranged in the inside to communicate the water inlet 310 and the water outlet 320, the circulating water channel can circulate cooling medium, the cooling medium enters the circulating water channel from the water inlet 310 and then flows out from the water outlet 320, the cooling water channel 300 is horizontally arranged below the MOS tube 200, and the top surface 330 of the cooling water channel 300 is in contact with the heat dissipation surface 210 at the top of the MOS tube 200.

[0035] In order to realize better heat dissipation effect, in the embodiment, two layers of heat-conducting gel 400 are arranged between the heat dissipation surface 210 of the MOS tube 200 and the top surface 330 of the cooling water channel 300, and a high-thermal-conductivity insulating hard ceramic gasket 500 is arranged between the two layers of heat-conducting gel 400.

[0036] The assembly process of the vehicle charger top heat dissipation structure provided by the embodiment will be described below in combination with the specific structure of the vehicle charger.

[0037] The main function of the charger is to convert AC power outside the vehicle into DC power to charge the vehicle battery, and the specific structure includes a housing 600, an upper cover plate 700, a lower cover plate 800, an EMI plate 900 and the above-mentioned heat dissipation structure.

[0038] The housing 600 is integrated with an HVDC connector 610 and an HVAC connector 620, the HVDC connector 610 is a high-voltage DC output connector, and the HVAC connector 620 is an AC input connector.

[0039] The cooling water channel 300 is arranged in the shell 600, a top surface 330 of the cooling water channel 300 is coated with the heat-conducting gel 400, then the ceramic gasket 500 is pasted on the heat-conducting gel 400, then the heat-conducting gel 400 is coated on the ceramic gasket 500, and then the PCB board 100 is installed, wherein the MOS tube 200 has been pre-welded on the bottom of the PCB board 100, and after the installation is completed, the heat dissipation surface 210 of the MOS tube 200 is ensured to be in full contact with the heat-conducting gel 400.

[0040] The EMI board 900 is also arranged in the shell 600 and is located below the cooling water channel 300.

[0041] After the parts in the shell 600 are assembled, the top and bottom of the shell 600 are packaged by using the upper cover plate 700 and the lower cover plate 800 respectively.

[0042] The heat dissipation principle of the top heat dissipation structure of the vehicle-mounted charger provided in the embodiment is as follows:

[0043] The heat generated by the MOS tube 200 on the PCB board 100 during operation is transmitted to the heat-conducting gel 400 through the heat dissipation surface 210, is transmitted to the ceramic gasket 500 again, is transmitted to the heat-conducting gel 400 again, is transmitted to the top surface 330 of the cooling water channel 300 through the heat-conducting gel 400, and is finally taken away by the low-temperature cooling liquid flowing in the cooling water channel 300, so that heat dissipation is realized.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A top heat dissipation structure of an on-board charger, characterized in that, The application relates to a MOS tube cooling device. The MOS tube cooling device comprises a PCB board (100), a MOS tube (200) horizontally connected to the bottom surface of the PCB board (100), and a cooling water channel (300) provided with a water inlet (310) and a water outlet (320), wherein a circulating water channel for connecting the water inlet (310) and the water outlet (320) is horizontally arranged in the cooling water channel (300), the cooling water channel (300) is horizontally arranged below the MOS tube (200), and the top surface of the cooling water channel (300) is in surface contact with the MOS tube (200). A heat-conducting gel (400) is arranged between the MOS tube (200) and the top surface of the cooling water channel (300). The heat-conducting gel (400) has two layers.

2. The top heat dissipation structure of a vehicle-mounted charger according to claim 1, wherein, A ceramic gasket (500) is arranged between the two layers of the heat-conducting gel (400).

3. The top heat dissipation structure of a vehicle-mounted charger according to claim 2, characterized in that, ​ 4. The top heat dissipation structure of a vehicle-mounted charger according to claim 3, characterized in that, ​

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