OBC and DCDC integrated machine waterway structure

Abstract

The utility model relates to an OBC and DCDC integrated machine water channel structure belongs to electric automobile heat dissipation technical field. Including MOS pipe assembly, transformer and three -phase PFC, these heat -generating devices, the water channel surrounds and forms the cooling cavity of surrounding type, the transformer and three -phase PFC are located in the cooling cavity body, and with the water channel inboard filling heat -conducting pouring sealant realizes contact heat dissipation, and MOS pipe assembly is located the outside of water channel, and the water channel has water inlet and water outlet. The utility model uses the mode of surrounding arrangement to the whole path of water channel to form the cooling wall body, includes complex devices such as transformer, three -phase PFC, and then uses heat -conducting pouring sealant to fill to reach the ideal heat transfer effect. Directly stick MOS switch tube on the outside of water channel, and all heat -generating devices are cooled under the same water channel through this structure.

Description

Technical Field

[0001] This utility model relates to a water channel structure for an integrated OBC and DC-DC converter, belonging to the field of electric vehicle heat dissipation technology. Background Technology

[0002] On-board charger (OBC) is one of the core components of new energy vehicles. As an on-board charger, it is responsible for converting AC power into DC power to charge the power battery.

[0003] A DC-DC converter, also known as a direct current to direct current converter, is a circuit or electromechanical device that converts direct current (DC) power into DC (or near-DC) power at different voltages.

[0004] With the continuous development of electric vehicle technology, the power levels of onboard OBC and DC-DC converters are gradually increasing. In order to provide better heat dissipation for the performance-enhancing OBC and DC-DC integrated system, the industry has also put forward more requirements for the water channel heat dissipation structure design of the OBC and DC-DC integrated unit.

[0005] In many mechanical structure designs, large heat-generating components can only be in close contact with the cooling channels on one side, resulting in poor heat dissipation.

[0006] In typical water cooling designs, heat dissipation is usually achieved from one side of the heat-generating component. However, in OBC and DC-DC integrated products, the components with the highest heat output cannot achieve adequate heat dissipation from a single bottom or side due to their structural limitations. Therefore, it is necessary to use materials with higher temperature resistance, which undoubtedly increases product costs. Utility Model Content

[0007] The purpose of this invention is to provide a water channel structure for an integrated OBC and DC-DC converter to solve the aforementioned technical problems.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] An OBC and DC-DC integrated water channel structure includes a MOS transistor assembly, a transformer, and a three-phase PFC, which are heat-generating devices; the water channel surrounds and forms an enclosed cooling cavity; the transformer and the three-phase PFC are located inside the cooling cavity and are in contact with the inner side of the water channel filled with thermally conductive potting compound to achieve heat dissipation; the MOS transistor assembly is located on the outer side of the water channel; the water channel has an inlet and an outlet.

[0010] A further improvement to the technical solution of this utility model is that a meandering waterway path is set up in the area where the three-phase PFC is located.

[0011] A further improvement to the technical solution of this utility model is that multiple surfaces of the three-phase PFC contact the water channel for heat dissipation.

[0012] A further improvement to the technical solution of this utility model is that the waterway is sealed with a waterway cover plate, and a sealing ring is set between the waterway and the waterway cover plate.

[0013] Due to the adoption of the above technical solution, the technical effects achieved by this utility model are as follows:

[0014] This invention utilizes multiple heat dissipation methods to address high-heat-generating components in the system by increasing the water channel pathway, thereby maintaining the operating temperature of the product within a reasonable range. The overall water channel pathway is arranged in a surrounding pattern to form a cooling wall, encompassing complex components such as transformers and three-phase PFCs, and then filled with thermally conductive potting compound to achieve ideal heat transfer.

[0015] In the technical solution of this utility model, the MOS switch is directly attached to the outside of the water channel. Through this structure, all heat-generating devices can be cooled in the same water channel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the arrangement of the heating element of this utility model;

[0017] Figure 2 This is a schematic diagram of the waterway cover of this utility model;

[0018] Figure 3 This is a schematic diagram of the mounting substrate of this utility model without a heating element;

[0019] Among them, 1. MOS transistor assembly, 2. transformer, 3. three-phase PFC, 4. water inlet, 5. water outlet, 6. water channel, 7. water channel cover. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] This utility model is a water channel structure for an integrated OBC and DC-DC converter, which is an important component of electric vehicles.

[0023] The OBC and DC-DC integrated unit includes a MOSFET assembly 1, a transformer 2, and a three-phase PFC 3. These three components are heat-generating devices and are soldered onto a PCB board. They are then installed inside the housing of the integrated unit.

[0024] like Figure 1 , Figure 2 As shown, the water channels of this integrated unit are designed in a circular path, thus forming a surrounding cooling cavity. Transformer 2 and three-phase PFC3 are located within the cooling cavity, and heat dissipation between these two devices and the inner surface of the water channel 6 is achieved through the filling of thermally conductive potting compound. MOSFET assembly 1 is attached to the outer surface of the water channel 6. In this way, the MOSFET assembly 1, transformer 2, and three-phase PFC3—the three heat-generating devices—are all located under the same water channel for heat dissipation.

[0025] Waterway 6 has an inlet 4 and an outlet 5, which are used to connect with the water source to form a water circulation system.

[0026] Because the three-phase PFC3 has high power and generates a lot of heat, setting up a zigzag water channel path in the area where the three-phase PFC3 is located can improve the heat dissipation effect. Furthermore, the position of the three-phase PFC3 allows multiple surfaces of it to contact the water channel 6 for heat dissipation, thereby improving the heat dissipation effect of the three-phase PFC3.

[0027] Waterway 6 is sealed with waterway cover plate 7, and a sealing ring is provided between waterway 6 and waterway cover plate 7. Figure 1 This is the component mounting board of the all-in-one machine. There are water channels on the back of the mounting board. Figure 2 The water channel cover plate and the water channel cover on the back of the mounting base plate are combined to form an integral water channel. The cross-sectional size of the water channel will vary depending on the actual situation.

[0028] This invention employs a surround-like arrangement of the water channel to form a cooling cavity, encompassing complex components such as transformers and three-phase PFCs. Thermally conductive potting compound is then used to fill the cavity to achieve optimal heat transfer. The MOS switching transistor is directly attached to the outside of the water channel, allowing all heat-generating components to dissipate heat within the same channel.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water channel structure for an integrated OBC and DC-DC converter, comprising a MOS transistor assembly (1), a transformer (2), and a three-phase PFC (3), these heat-generating devices; characterized in that: The water channel surrounds to form a cooling cavity; the transformer (2) and the three-phase PFC (3) are located inside the cooling cavity and are filled with thermally conductive potting compound to achieve heat dissipation; the MOS tube assembly (1) is located on the outer side of the water channel (6); the water channel (6) has an inlet ((4)) and an outlet (5).

2. The water channel structure of an OBC and DC-DC integrated machine according to claim 1, characterized in that: The area where the three-phase PFC (3) is located is set with a meandering waterway path.

3. The OBC and DC-DC integrated water channel structure according to claim 2, characterized in that: Multiple surfaces of the three-phase PFC (3) contact the water channel (6) for heat dissipation.

4. The water channel structure of an OBC and DC-DC integrated machine according to claim 1, characterized in that: The waterway (6) is sealed with a waterway cover (7), and a sealing ring is provided between the waterway (6) and the waterway cover (7).

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