DC / DC converter and energy storage DC microgrid

Abstract

The utility model relates to the technical field of DC / DC converters, in particular to a DC / DC converter and an energy storage DC microgrid. The utility model provides a DC / DC converter, which comprises a converter shell, a radiator and a fin fan, the radiator is arranged in the converter shell, the radiator comprises a radiating plate and a fin part, one surface of the radiating plate is provided with a first radiating device mounting position, the fin part is arranged on the other opposite surface, and the first radiating device mounting position is provided with a second radiating device mounting position. The fin part comprises a first fin set and a second fin set, a second heat dissipation device installation position is arranged between the first fin set and the second fin set, and a gap opening of the first fin set and the second fin set faces the second heat dissipation device installation position to form a heat dissipation air channel. The heat dissipation air channel is used for discharging heat of the device out of the converter shell; the fin fan is connected with the fin part, and the fin fan is used for providing airflow for the heat dissipation air channel. The structure is compact, maintenance is convenient, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of DC / DC converters, and particularly to a DC / DC converter and an energy storage DC microgrid. Background Art

[0002] The DC-DC converter is a key device in the energy storage DC microgrid. As a medium connecting the energy storage device and the microgrid, it plays roles such as voltage matching, power flow control, and short-circuit protection. Among them, the interleaved bidirectional DC-DC converter can achieve bidirectional energy flow, wide voltage range, small current ripple on the low-voltage side, compact structure, simple control, and reliable operation, and is suitable for non-isolated occasions where batteries are connected to the microgrid; the bidirectional isolated DC-DC converter can better achieve power conversion and enable bidirectional power transmission. These converters are mostly high-power DC-DC converters. However, with the increase in power of the existing DC-DC converters, the maintenance difficulty increases and the heat dissipation effect decreases. There is an urgent need for a DC-DC converter with a compact structure that is convenient for maintenance and has an improved heat dissipation effect. Summary of the Utility Model

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, in a first aspect of the present disclosure, a DC / DC converter is provided, including a converter housing, a radiator, and a fin fan. The radiator is disposed inside the converter housing, wherein,

[0005] The radiator includes a heat dissipation plate and a fin portion. A first heat dissipation device mounting position is provided on one surface of the heat dissipation plate, and the fin portion is disposed on the opposite surface. The fin portion includes a first fin group and a second fin group. A second heat dissipation device mounting position is provided between the first fin group and the second fin group, and the gap between the first fin group and the second fin group is open towards the second heat dissipation device mounting position to form a heat dissipation air duct, and the heat dissipation air duct is used to discharge the heat of the device out of the converter housing;

[0006] The fin fan is connected to the fin portion, and the fin fan is used to provide air flow to the heat dissipation air duct.

[0007] In a feasible implementation manner, an insulating heat-conducting ceramic sheet is provided on the first heat dissipation device mounting position, and the insulating heat-conducting ceramic sheet is connected to the device.

[0008] In a feasible implementation manner, a heat-conducting silicone grease is provided between the insulating heat-conducting ceramic sheet and the device.

[0009] In a feasible implementation manner, the heat dissipation plate is detachably connected to the converter housing.

[0010] In a feasible implementation manner, a fan maintenance board is provided on the converter housing, the fan maintenance board faces the finned fan, and the fan maintenance board is detachably connected to the converter housing.

[0011] In a feasible implementation manner, the converter housing includes a top plate, a surrounding plate, and a bottom plate, and the top plate, the surrounding plate, and the bottom plate are detachably connected.

[0012] In a feasible implementation manner, the finned fan is set as a variable-speed fan.

[0013] In a feasible implementation manner, the finned fan is connected to the radiator through a mounting plate, and the mounting plate is arranged on one side of the first fin group or the second fin group away from the second heat dissipation device mounting position.

[0014] In a feasible implementation manner, the number of the finned fans is set to be multiple, and the multiple finned fans are evenly arranged in the extending direction of the mounting plate.

[0015] In the second aspect of the present disclosure, an energy storage DC microgrid is provided, including the above-mentioned DC / DC converter.

[0016] Compared with the prior art, the present disclosure at least includes the following beneficial effects: The radiator of the present disclosure includes a heat dissipation plate and a fin portion. One surface of the heat dissipation plate is provided with a first heat dissipation device mounting position, and heat dissipation devices such as a switching tube with a large heat generation amount are arranged on the first heat dissipation device mounting position. The fin portion is arranged on the other surface opposite to the first heat dissipation device mounting position, and the fin portion includes a first fin group and a second fin group. A second heat dissipation device mounting position is arranged between the first fin group and the second fin group, and an inductor and a transformer with a large heat generation amount are arranged in the second heat dissipation device mounting position 24. The gap opening between the first fin group and the second fin group of the present disclosure faces the second heat dissipation device mounting position to form a complete heat dissipation air duct, thereby improving the heat dissipation effect. The finned fan is connected to the fin portion, making the internal structure layout compact, and the finned fan is used to provide air flow to the heat dissipation air duct, and the heat dissipation performance is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

[0019] By reading the detailed description of the exemplary embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the exemplary embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0020] Figure 1 Schematic structural diagram of the first fin group, the second fin group and the second heat dissipation device installation position of the present disclosure;

[0021] Figure 2 Exploded structural diagram of the present disclosure;

[0022] Figure 3 Schematic three-dimensional structural diagram of the present disclosure;

[0023] Figure 4 Schematic internal top view structural diagram of the present disclosure.

[0024] Among them, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names in the figures is as follows: 1 - converter housing; 11 - fan maintenance plate; 12 - top plate; 13 - side plate; 14 - bottom plate; 2 - mounting plate; 21 - heat dissipation plate; 22 - first fin group; 23 - second fin group; 24 - second heat dissipation device installation position; 25 - heat dissipation air duct; 3 - fin fan. Detailed implementation manners

[0025] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the solution of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0026] Many specific details are set forth in the following description in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0027] For the existing DC-DC converter, as the power increases, its maintenance difficulty increases and the heat dissipation effect decreases. There is an urgent need for a DC-DC converter with a compact structure, convenient maintenance and enhanced heat dissipation effect.

[0028] Based on this, embodiments of the present disclosure provide a DC / DC converter. The heat sink of the present disclosure includes a heat dissipation plate and a fin portion. One surface of the heat dissipation plate is provided with a first heat dissipation device mounting position, and a heat dissipation device such as a switch tube with a large heat generation amount is arranged on the first heat dissipation device mounting position. The fin portion is arranged on the other surface opposite to the first heat dissipation device mounting position, and the fin portion includes a first fin group and a second fin group. A second heat dissipation device mounting position is arranged between the first fin group and the second fin group. A large-heat-generation inductor and a transformer are arranged in the second heat dissipation device mounting position 24. The gap between the first fin group and the second fin group of the present disclosure faces the second heat dissipation device mounting position to form a complete heat dissipation air duct, thereby improving the heat dissipation effect. The fin fan is connected to the fin portion, making the internal structure layout compact, and the fin fan is used to provide air flow to the heat dissipation air duct, and the heat dissipation performance is excellent.

[0029] The following provides a detailed description of the DC / DC converter through specific embodiments:

[0030] Referring to Figures 1 to 4 As shown, in a first aspect of the present disclosure, a DC / DC converter is provided, including a converter housing 1, a heat sink, and a fin fan 3. The heat sink is arranged inside the converter housing 1. The heat sink includes a heat dissipation plate 21 and a fin portion. A first heat dissipation device mounting position is arranged on one surface of the heat dissipation plate 21, and the fin portion is arranged on the opposite surface. The fin portion includes a first fin group 22 and a second fin group 23. A second heat dissipation device mounting position 24 is arranged between the first fin group 22 and the second fin group 23, and the gap between the first fin group 22 and the second fin group 23 faces the second heat dissipation device mounting position 24 to form a heat dissipation air duct 25. The heat dissipation air duct 25 is used to discharge the heat of the device from the converter housing 1; the fin fan 3 is connected to the fin portion, and the fin fan 3 is used to provide air flow to the heat dissipation air duct 25.

[0031] The heat sink of the present disclosure includes a heat dissipation plate and a fin portion. Among them, the heat dissipation plate is set as the heat dissipation plate conventionally set in the DC-DC converter, such as heat dissipation forms such as air cooling, water cooling, and heat conduction. Its structure and performance are selected according to actual use. The heat dissipation plate of the present disclosure is specifically selected as a rectangular plate structure, and its basic heat dissipation performance and principle will not be elaborated. The heat dissipation plate of the present disclosure is specifically processed from 6063 profiles. After the 6063 profiles are blackened, the heat conduction performance is excellent, and it can reach 201 W / (m·K) from the ordinary 170 W / (m·K).

[0032] Specifically, a first heat dissipation device mounting position is arranged on one surface of the heat dissipation plate of the present disclosure, and a heat dissipation device such as a switch tube with a large heat generation amount is arranged on the first heat dissipation device mounting position. The heat on the first heat dissipation device mounting position is discharged or reduced through the basic performance of the heat dissipation plate. Such as Figure 1 、 2As shown in FIGS. 3 and 4, the fin portion is disposed on the other surface opposite to the first heat dissipation device mounting position, and the fin portion includes a first fin group and a second fin group. A second heat dissipation device mounting position 24 is provided between the first fin group 22 and the second fin group 23. Inductors and transformers with large heat generation are provided in the second heat dissipation device mounting position 24. The leads of the inductors and transformers are connected to the circuit board through the middle hole of the radiator. The mounting holes are provided with toothed protection coils to ensure the safety of the leads. The gap opening between the first fin group 22 and the second fin group 23 of the present disclosure faces the second heat dissipation device mounting position 24 to form a complete heat dissipation air duct 25, thereby improving the heat dissipation effect.

[0033] The fin fan 3 of the present disclosure can be disposed at any position of the converter housing. The fin fan 3 is used to provide air flow to the heat dissipation air duct 25. For example, the fin fan 3 is connected to the fin portion so that the internal structure layout is compact and the heat dissipation performance is excellent. Specifically, the fin fan 3 can be disposed on the side of the first fin group 22 or the second fin group 23 away from the second heat dissipation device mounting position 24, that is, blowing from one end of the heat dissipation plate 21 to the other end. The fin portion also plays a role in supporting and heat conduction, supporting the internal devices and at the same time playing a role in conducting heat to the box body. As shown in the figure, each of the first fin group and the second fin group is formed by a plurality of plate-like structures arranged at intervals, and the interval distance between every two plate-like structures constitutes the heat dissipation air duct 25. Specifically, the heat dissipation air duct formed by the first fin group and the second fin group faces the second heat dissipation device mounting position, and the central axes of the extending directions of the heat dissipation air ducts on both sides are oppositely arranged to jointly form a complete heat dissipation air duct 25. When the heat dissipation state is formed, with the fin fan 3 disposed on the side of the first fin group 22 away from the second heat dissipation device mounting position 24, the fin fan 3 provides air flow to blow through the heat dissipation air duct 25 formed by the first fin group 22 to the second fin group 23. At this time, the air flow first enters through one side of the heat dissipation air duct 25 formed by the first fin group 22, then flows to the second heat dissipation device mounting position 24 to bring heat into the heat dissipation air duct 25 formed by the second fin group 23 and then is discharged from the converter housing 1. It can be understood that an exhaust structure such as an exhaust hole is provided on the side of the converter housing 1 corresponding to the discharge end of the heat dissipation air duct 25, which can enable the hot air to be discharged.

[0034] In some embodiments, an insulating and heat-conducting ceramic sheet is disposed on the first heat dissipation device mounting position, and the insulating and heat-conducting ceramic sheet is connected to the device. The device is a device to be cooled, such as a switching tube, etc. The heat conductivity of the insulating and heat-conducting ceramic sheet can reach 29.3 W / m·K, which has a significant improvement in heat conduction performance compared with the heat conduction coefficient of 5-8.5 W / m·K of a general heat conduction pad. Further, in order to increase the heat conduction area and improve the heat dissipation effect, a heat-conducting silicone grease is disposed between the insulating and heat-conducting ceramic sheet and the device. The heat-conducting silicone grease is made of organosilicone as the main raw material and added with materials with excellent heat resistance and heat conduction performance. The made heat-conducting organosilicone grease-like composite can maintain the paste state during use for a long time at a temperature of -50°C to +230°C, and at the same time has a low oil separation degree (tending to zero), and has the effects of resistance to high and low temperatures, water, ozone, and weather aging.

[0035] In some embodiments, the converter housing 1 includes a top plate 12, a side plate 13 and a bottom plate 14. The top plate 12, the side plate 13 and the bottom plate 14 are detachably connected. The present disclosure adopts an overall up-and-down structure. The heat dissipation plate 21 is fixed to the stud on the bottom plate 14, which can ensure the stability of the wall-mounted installation. And the heat dissipation plate 21 is detachably connected to the converter housing 1 for easy maintenance and repair. The weight of the radiator is concentrated on the bottom plate 14, and the mounting holes are also located on the plate. When maintaining the devices on the bottom plate, only the cover plate 12 and the side plate 13 need to be removed; when normally maintaining the circuit board, only the top plate 12 needs to be opened. Further, a fan maintenance plate 11 is disposed on the converter housing 1. The fan maintenance plate 11 faces the finned fan 3, and the fan maintenance plate 11 is detachably connected to the converter housing 1. For the fan that often needs to be maintained, only the rear fan maintenance plate 3 needs to be opened, so that the fan can be maintained in time to ensure the performance of the converter. The top plate 12, the side plate 13, the fan maintenance plate 11 and the bottom plate 14 of the present disclosure are machined from 6061 aluminum alloy plates. 6061 aluminum alloy has good corrosion resistance, toughness and is not easy to deform after processing. It is easy to color the film, and the aluminum alloy has good heat dissipation effect. The heat of the components can also be conducted to the bottom plate through the heat sink and then dissipated.

[0036] In some embodiments, the finned fan 3 is set as a variable-speed fan. Specifically, a high-performance variable-speed fan with 16500 RPM is selected, which is higher than the 2000-6000 rpm of a common fan, to ensure the heat dissipation performance of each device.

[0037] In some embodiments, the finned fan 3 is connected to the radiator through a mounting plate 2. The mounting plate 2 is disposed on the side of the first fin group 22 or the second fin group 23 away from the second heat dissipation device mounting position 24. Further, the number of the finned fans 3 is set to be multiple, and the multiple finned fans 3 are evenly distributed in the extending direction of the mounting plate 2.

[0038] In this embodiment, the finned fan 3 is connected to the radiator through the mounting plate 2, avoiding direct welding to the radiator, which is convenient for maintenance and repair. The mounting plate 2 is arranged on the side of the first fin group 22 or the second fin group 23 away from the second heat dissipation device mounting position 24, so that the air flow of the finned fan can flow from one side to the other side to the greatest extent, increasing the heat dissipation effect. Further, the number of finned fans 3 is set to be multiple, and the multiple finned fans 3 are evenly arranged in the extending direction of the mounting plate 2 to provide greater wind force. Further, each finned fan 3 can be set to be independently controlled, so as to specifically control the magnitude of the wind force and facilitate the adjustment of the heat dissipation performance.

[0039] In the second aspect of the present disclosure, an energy storage DC microgrid is provided, including the above-mentioned DC / DC converter.

[0040] In the present disclosure, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "multiple" means two or more, unless otherwise clearly defined. Terms such as "mounting", "connecting", "connection", and "fixing" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0041] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be construed as a limitation to the present disclosure.

[0042] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A DC / DC converter, characterized in that: It includes a converter housing, a radiator and a fin fan, wherein the radiator is arranged in the converter housing, wherein: The heat sink comprises a heat sink and a fin portion, a first heat sink device installation position is arranged on one surface of the heat sink, the fin portion is arranged on the other opposite surface, the fin portion comprises a first fin group and a second fin group, a second heat sink device installation position is arranged between the first fin group and the second fin group, and a gap opening between the first fin group and the second fin group is formed toward the second heat sink device installation position to form a heat dissipation duct, and the heat dissipation duct is used to discharge device heat out of the converter housing; The fin fan is connected to the fin portion, and the fin fan is used to provide airflow to the heat dissipation air duct.

2. The DC / DC converter according to claim 1, characterized in that: An insulating thermally conductive ceramic sheet is arranged on the mounting position of the first heat dissipation device, and the insulating thermally conductive ceramic sheet is connected to the device.

3. The DC / DC converter according to claim 2, characterized in that: Thermally conductive silicone grease is arranged between the insulating thermally conductive ceramic sheet and the device.

4. The DC / DC converter according to claim 1, characterized in that: The heat sink is detachably connected to the converter housing.

5. The DC / DC converter according to claim 1, characterized in that: A fan maintenance plate is arranged on the converter housing, the fan maintenance plate faces the fin fan, and the fan maintenance plate is detachably connected to the converter housing.

6. The DC / DC converter according to claim 1, characterized in that: The converter housing comprises a top plate, a surrounding plate and a bottom plate, and the top plate, the surrounding plate and the bottom plate are detachably connected.

7. The DC / DC converter according to claim 1, characterized in that: The fin fan is configured as a variable speed fan.

8. The DC / DC converter according to claim 1, characterized in that: The fin fan is connected to the heat sink via a mounting plate, and the mounting plate is arranged on a side of the first fin group or the second fin group away from a mounting position of the second heat sink.

9. The DC / DC converter according to claim 8, characterized in that: The number of the fin fans is set to be multiple, and the multiple fin fans are evenly distributed in the extension direction of the mounting plate.

10. A DC energy storage microgrid, characterized in that: The invention comprises the DC / DC converter according to any one of claims 1 to 9.

Images