Heat dissipation structure of bidirectional DCDC converter

Abstract

The utility model discloses a heat radiation structure of a bidirectional DCDC converter, and relates to the technical field of DCDC converters, the heat radiation structure comprises a cabinet, an upper air channel and a lower air channel are arranged in the cabinet, and the lower air channel is arranged at the bottom of the upper air channel; the isolation panel is arranged between the upper air duct and the lower air duct; a panel; the radiator is located on the side, close to the lower fan, in the lower air channel, and airflow holes are formed in the two sides of radiating fins of the radiator in an array mode. According to the heat dissipation structure of the bidirectional DCDC converter, airflow can well flow through the secondary heating elements and the roots of the radiator fins, conduction and accumulation of heat in the vertical direction are reduced, the heat dissipation efficiency of the DCDC converter is improved, meanwhile, the situations of unsmooth airflow flowing and local high temperature caused by too many elements can be avoided, and the service life of the DCDC converter is prolonged. The effect of improving the heat dissipation efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of DCDC converters, and more specifically to a heat dissipation structure of a bidirectional DCDC converter. Background Art

[0002] A bidirectional DCDC converter is a power electronic device that can efficiently convert direct current (DC) voltage in two directions. This type of converter is commonly used in applications that require bidirectional energy flow. For example, in an electric vehicle charging station, energy can flow from the power grid to the vehicle battery (charging mode) or from the vehicle battery back to the power grid (discharging or V2G mode). Bidirectional DCDC converters are also common in energy storage systems, renewable energy integration systems, and microgrids.

[0003] During the operation of a bidirectional DC / DC converter, due to the continuous power consumption of the main heating elements, secondary heating elements, ordinary heating elements, and the core control board inside, a certain amount of heat will be generated. If these heats cannot be dissipated in a timely and effective manner, it will cause the internal temperature to rise, which will in turn affect the performance and efficiency of each component. In severe cases, it may threaten the safety and reliability of the entire system.

[0004] In the current design of bidirectional DC-DC converters, forced air cooling technology is generally used to achieve thermal management, aiming to maintain the temperature of key components within the safe operating range. However, the heat dissipation architectures in existing systems often fail to effectively distinguish components with different heat levels, that is, high-power loss components (main heating elements), medium-power loss components (secondary heating elements), low-power loss components (ordinary heating elements), and sensitive core control circuits are integrated in the same air duct path. This non-optimized air duct layout results in low utilization efficiency of the cooling air, and thus poor heat exchange performance. Specifically, when the cooling air flows through each heating element, its heat absorption capacity gradually weakens. Finally, when it reaches the core control board, it may not be able to provide sufficient cooling effect, which directly affects the overall thermal performance of the bidirectional DC / DC converter. To overcome this limitation, common remedial measures are to increase the air volume of the cooling fan or increase the size of the heat sink. However, this will undoubtedly increase the physical weight and manufacturing cost of the device. At the same time, too many components inside will hinder the flow of air, resulting in a longer or more complex heat path, thereby increasing the thermal resistance and causing the heat in some areas not to be effectively taken away, resulting in local overheating areas.

[0005] Therefore, it is necessary to propose a heat dissipation structure of a bidirectional DCDC converter to solve the above problems. Summary of the Utility Model

[0006] To solve the above problems, the present utility model provides a heat dissipation structure for a bidirectional DCDC converter, which can improve the heat dissipation efficiency, reduce the height of the converter, and at the same time, reduce the wind resistance and increase the flow velocity of the air flow.

[0007] The present utility model specifically adopts the following technical solutions to achieve the above objectives:

[0008] A heat dissipation structure for a bidirectional DCDC converter, comprising:

[0009] A chassis, an upper air duct and a lower air duct are provided inside the chassis, and the lower air duct is located at the bottom of the upper air duct;

[0010] An isolation panel, which is arranged between the upper air duct and the lower air duct and is fixed on the inner walls on both sides of the chassis;

[0011] A front panel, which is fixed on one side of the chassis. A lower fan is connected to one side of the front panel located in the lower air duct, and an upper fan is connected to one side of the front panel located in the upper air duct;

[0012] A radiator, which is located on one side close to the lower fan in the lower air duct, and air flow holes are arrayed on both sides of the heat dissipation fins of the radiator;

[0013] Internal components, which include main heat generating elements, secondary heat generating elements, ordinary heat generating elements and a core control board. The ordinary heat generating elements are fixed on one side of the isolation panel close to the upper fan at the top, the core control board is fixed on one side of the isolation panel far from the upper fan at the top, the secondary heat generating elements are fixed on the bottom wall of the chassis far from the lower fan, a through hole is provided on one side of the isolation panel close to the front panel, the main heat generating elements are fixed in the holes of the isolation panel, and the main heat generating elements are fixed at the central position of the top of the radiator.

[0014] Preferably, a rear panel is connected to one side of the chassis away from the front panel, heat dissipation holes for air flow are provided on the front panel and the rear panel, and an upper cover plate is connected to the top of the chassis.

[0015] Preferably, the arrangement direction of the heat dissipation fins on the radiator is the same as the air flow direction, and the radiator is fixed on the side wall of the chassis.

[0016] Preferably, the air flow holes on both sides of the heat dissipation fins are arranged staggeredly, the air flow holes between adjacent two heat dissipation fins are arranged at the same height, and guiding inclined surfaces are provided at both ends of the air flow holes.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. By setting up the upper and lower air ducts inside the chassis, the upper air duct can play a role in cooling the ordinary heating elements and the core control board. The air flow in the lower air duct can flow well through the secondary heating elements and the roots of the radiator fins, reducing the heat conduction and accumulation in the vertical direction, improving the heat dissipation efficiency of the DCDC converter. At the same time, it can avoid the situation of poor air flow caused by too many components, resulting in local high temperature, and has the effect of improving the heat dissipation efficiency.

[0019] 2. The device is provided with holes on the isolation panel, so that the main heating elements can be located in the upper air duct and the lower air duct. Both air ducts can play a role in dissipating heat from the main heating elements, thereby reducing the temperature of the main heating elements and improving the cooling effect on the main heating elements.

[0020] 3. By setting air flow holes on the radiator fins, the contact area between the air flow and the radiator fins can be increased, thereby improving the heat dissipation effect. At the same time, the wind resistance during air flow can be reduced, and the air flow velocity in the lower air duct can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the upper air duct and the lower air duct structures in the present utility model;

[0022] Figure 2 It is a schematic diagram of the radiator and the air flow hole structures in the present utility model;

[0023] Figure 3 It is a schematic diagram of the front panel in the present utility model;

[0024] Figure 4 It is a schematic diagram of the rear panel structure in the present utility model.

[0025] REFERENCE NUMERALS:

[0026] 101, chassis; 102, upper air duct; 103, lower air duct; 104, isolation panel; 105, front panel; 106, lower fan; 107, upper fan; 108, radiator; 109, air flow hole; 110, main heating element; 111, secondary heating element; 112, ordinary heating element; 113, core control board; 114, rear panel; 115, upper cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1-4 , a heat dissipation structure of a bidirectional DCDC converter, comprising:

[0029] Reference Figure 1 , a chassis 101, in which an upper air duct 102 and a lower air duct 103 are provided. By setting up a double air duct, the components inside the converter can be separated, so that the air flow in the lower air duct 103 can fully contact the secondary heat generating elements 111 and the heat dissipation fins of the radiator 108, improving the efficiency of the air flow in reducing the temperature. At the same time, the air flow at the top can dissipate heat from the ordinary heat generating elements 112 and the core control board 113, avoiding the situation where the air flow is blocked by multiple components and causing slow flow rate. The lower air duct 103 is located at the bottom of the upper air duct 102;

[0030] Reference Figure 1 , an isolation panel 104, which is arranged between the upper air duct 102 and the lower air duct 103. The isolation panel 104 serves to separate the air ducts. There are holes on the upper surface of the isolation panel 104 for the main heat generating element 110 to pass through, so that the radiator 108 can dissipate heat from the bottom of the main heat generating element 110, while the top is located in the upper air duct 102, and the air flow in the upper air duct 102 can cool the top of the main heat generating element 110. The isolation panel 104 is fixed on the inner walls on both sides of the chassis 101;

[0031] A front panel 105, which is fixed on one side of the chassis 101. The front panel 105 and the rear panel 114 are symmetrically arranged, and there are heat dissipation holes on them. The rear panel 114 is the air inlet end, and the front panel 105 is the air outlet end. A lower fan 106 is connected to one side of the front panel 105 located in the lower air duct 103, and an upper fan 107 is connected to one side of the front panel 105 located in the upper air duct 102;

[0032] Reference Figure 1 , a radiator 108, which is located on one side of the lower air duct 103 close to the lower fan 106. The top of the radiator 108 is connected to the main heat generating element 110. The heat dissipation fins of the radiator 108 are in the same direction as the air flow in the lower air duct 103, so that the air flow can flow smoothly, thereby dissipating heat from the main heat generating element 110. Air flow holes 109 are arrayed on both sides of the heat dissipation fins of the radiator 108, and the air flow holes 109 are used to increase the area of the channel through which the air flow can pass, thereby improving the heat dissipation effect;

[0033] Internal components, including a main heat generating element 110, a secondary heat generating element 111, an ordinary heat generating element 112 and a core control board 113, which are the main components;

[0034] Specifically, the main heating element 110 includes power switching devices such as IGBTs, which are soldered onto the power control circuit board and then fixed at the exact middle position of the radiator 108. Heat is transferred to the radiator 108 through thermal conductive glue. The secondary heating element 111 includes filtering devices such as inductors and capacitors, which are fixed on the filtering circuit board and installed between the radiator 108 and the rear panel 114. The ordinary heating element 112 mainly includes heating elements such as electrolytic capacitors, chip capacitors, and chip resistors, which are soldered in the power control circuit board and fixed to the isolation panel 104 by bolts. The core control board 113 is located above the secondary heating element 111 and is connected to the isolation panel 104 by bolts. The ordinary heating element 112 is fixed on one side of the top of the isolation panel 104 near the upper fan 107, and the core control board 113 is fixed on one side of the top of the isolation panel 104 away from the upper fan 107. The secondary heating element 111 is fixed on one side of the bottom wall of the chassis 101 away from the lower fan 106. The side of the isolation panel 104 close to the front panel 105 is provided with a through hole. The through hole enables the main heating element 110 to be located in two air ducts, and the main heating element 110 is cooled through the two air ducts, while also having the effect of reducing the overall height of the device. The main heating element 110 is fixed in the hole of the isolation panel 104, and the main heating element 110 is fixed at the central position of the top of the radiator 108.

[0035] Specifically, referring to Figure 1 and Figure 4 , a rear panel 114 is connected to the side of the chassis 101 away from the front panel 105. The rear panel 114 is the air inlet end of the air flow. The front panel 105 and the rear panel 114 are provided with heat dissipation holes for the air flow to pass through. The top of the chassis 101 is connected with an upper cover plate 115, and the upper cover plate 115 is detachably installed on the chassis 101 to facilitate the maintenance of the internal components.

[0036] Specifically, the arrangement direction of the heat dissipation fins on the radiator 108 is the same as the air flow direction, enabling the air flow to smoothly pass through between the heat dissipation fins. The radiator 108 is fixed on the side wall of the chassis 101.

[0037] Specifically, referring to Figure 2 , the air flow holes 109 on both sides of the heat dissipation fins are arranged staggeredly. The staggeredly arranged air flow holes 109 are not at the same height, which is used to maintain the strength of the heat dissipation fins. The air flow holes 109 between adjacent two heat dissipation fins are arranged at the same height, enabling a circular air flow channel to be formed between the two heat dissipation fins, increasing the contact area between the air flow and the heat dissipation fins. Guide slopes are provided at both ends of the air flow holes 109, and the slopes can guide the air flow to make it enter the air flow holes 109 more smoothly.

[0038] In this embodiment, the lower fan 106 and the upper fan 107 are arranged facing the front panel 105, so that the air flow can enter from the rear panel 114. The air flow at the top will enter the upper air duct 102, come into contact with the core control board 113 and the ordinary heating elements 112 in sequence, carry away the heat generated by them, play a role in cooling them, and at the same time will also come into contact with the top of the main heating element 110, thus playing a certain role in cooling it;

[0039] The air flow at the bottom will enter the lower air duct 103, first carry away the heat of the secondary heating element 111, and then enter the radiator 108. When flowing in the air flow holes 109, it will increase the contact area with the heat dissipation fins, improve the heat dissipation effect on the main heating element 110, and finally the air flow carrying the heat will be discharged from the front panel 105 after passing through the upper fan 107 and the lower fan 106.

[0040] The above-mentioned implementation manners are only the preferred implementation manners of the present utility model, and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present utility model belong to the scope of protection required by the present utility model.

Claims

1. A heat dissipation structure of a bidirectional DCDC converter, characterized in that: include: A chassis (101), wherein an upper air duct (102) and a lower air duct (103) are provided inside the chassis (101), and the lower air duct (103) is located at the bottom of the upper air duct (102); An isolation panel (104), the isolation panel (104) being arranged between the upper air duct (102) and the lower air duct (103), and the isolation panel (104) being fixed to inner walls on both sides of the chassis (101); A front panel (105), the front panel (105) being fixed to one side of the chassis (101), the side of the front panel (105) located at the lower air duct (103) being connected to a lower fan (106), and the side of the front panel (105) located at the upper air duct (102) being connected to an upper fan (107); A radiator (108), the radiator (108) being located on one side of the lower air duct (103) close to the lower fan (106), and having air flow holes (109) arrayed on both sides of the heat dissipation fins of the radiator (108); An internal component comprises a main heating element (110), a secondary heating element (111), a common heating element (112) and a core control board (113); the common heating element (112) is fixed to a side of the top of an isolation panel (104) close to an upper fan (107); the core control board (113) is fixed to a side of the top of an isolation panel (104) away from the upper fan (107); the secondary heating element (111) is fixed to a side of the bottom wall of a chassis (101) away from a lower fan (106); a through hole is provided on a side of the isolation panel (104) close to a front panel (105); the main heating element (110) is fixed in the hole of the isolation panel (104); and the main heating element (110) is fixed to the top center of a radiator (108).

2. The heat dissipation structure of a bidirectional DCDC converter according to claim 1, characterized in that: A rear panel (114) is connected to a side of the chassis (101) away from the front panel (105); heat dissipation holes for airflow are provided on the front panel (105) and the rear panel (114); and an upper cover plate (115) is connected to the top of the chassis (101).

3. The heat dissipation structure of a bidirectional DCDC converter according to claim 1, characterized in that: The arrangement direction of the heat dissipation fins on the heat sink (108) is the same as the air flow direction, and the heat sink (108) is fixed on the side wall of the chassis (101).

4. The heat dissipation structure of a bidirectional DCDC converter according to claim 3, characterized in that: The airflow holes (109) on both sides of the heat dissipation fins are arranged in a staggered manner, the airflow holes (109) between two adjacent heat dissipation fins are arranged at the same height, and guiding inclined surfaces are arranged at both ends of the airflow holes (109).

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