energy storage power supply

Abstract

The application discloses a kind of energy storage power supply.It includes shell, multiple heat dissipation fins, fan and heat pipe, wherein, shell is used to accommodate inverter and battery pack, battery pack is electrically connected with inverter, shell includes the heat dissipation surface of being arranged in the inside of shell, heat dissipation surface is thermally coupled with inverter;Multiple heat dissipation fins are arranged at intervals in the outside of shell and are oppositely arranged with heat dissipation surface, and form air duct between every two adjacent heat dissipation fins;Fan is arranged outside the shell, and fan forms flowing airflow and flows through air duct;Heat pipe is used for circulating flow of heat exchange medium, heat pipe is installed on heat dissipation surface and is thermally coupled with heat dissipation surface, and heat pipe is thermally connected with the first heat dissipation area and the second heat dissipation area of heat dissipation surface, the first heat dissipation area is thermally coupled with the first circuit of inverter, and the second heat dissipation area is thermally coupled with the second circuit of inverter, and the heat generation of first circuit is greater than the heat generation of second circuit.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic device technology, and more specifically, to an energy storage power source. Background Technology

[0002] With market and technological development, energy storage power supplies are gaining increasing attention and being widely applied, leading to higher demands for their heat dissipation performance. The inverter, a core component of energy storage power supplies, generates a significant amount of heat during operation. However, existing heat dissipation methods often suffer from low efficiency and uneven heat distribution, severely impacting the reliability and lifespan of energy storage devices. Summary of the Invention

[0003] The present invention provides an energy storage power source.

[0004] The energy storage power supply according to the embodiments of this application includes a housing, multiple heat dissipation fins, a fan, and a heat pipe. The housing is used to house an inverter and a battery pack, and the battery pack is electrically connected to the inverter. The housing includes a heat dissipation surface disposed on the inner side of the housing, and the heat dissipation surface is thermally coupled to the inverter. Multiple heat dissipation fins are spaced apart on the outer side of the housing and are arranged opposite to the heat dissipation surface, with an air duct formed between every two adjacent heat dissipation fins. The fan is disposed on the outer side of the housing and generates airflow that flows through the air duct. The heat pipe is used to supply the heat exchange medium for circulation. The heat pipe is installed on the heat dissipation surface and is thermally coupled to the heat dissipation surface. The heat pipe is thermally connected to a first heat dissipation area and a second heat dissipation area of ​​the heat dissipation surface. The first heat dissipation area is thermally coupled to a first circuit of the inverter, and the second heat dissipation area is thermally coupled to a second circuit of the inverter. The heat generation of the first circuit is greater than that of the second circuit.

[0005] In the energy storage power supply of this application embodiment, a first heat dissipation area and a second heat dissipation area of ​​the heat dissipation surface are thermally connected by a heat pipe. The first heat dissipation area is thermally coupled to the first circuit of the inverter, and the second heat dissipation area is thermally coupled to the second circuit of the inverter. The heat generation of the first circuit is greater than that of the second circuit. The heat exchange medium circulates within the heat pipe, allowing the heat pipe to quickly conduct heat to the inverter. Furthermore, a fan creates airflow through the air duct. Combining liquid cooling and air cooling methods improves heat dissipation efficiency and promotes uniform heat distribution. Simultaneously, the casing integrates heat dissipation and structural functions, reducing the number of components, lowering installation complexity, and facilitating the miniaturization and weight reduction of the energy storage power supply, thus improving portability.

[0006] In some embodiments, the housing includes a base plate and a bottom plate, the inverter is mounted on the base plate, the bottom plate is disposed on the side of the base plate away from the inverter and covers the fan and heat dissipation fins, and the bottom plate is provided with a first ventilation hole and a second ventilation hole, which are disposed on both sides of the air duct.

[0007] Thus, by setting the base plate on the side of the substrate away from the inverter and covering the fan and heat dissipation fins, and setting the base plate with the first ventilation hole and the second ventilation hole on both sides of the air duct, the convection effect is enhanced and the structure is made more compact. While ensuring the structural strength of the shell, the weight is reduced, which is conducive to the miniaturization and lightweighting of the energy storage power supply.

[0008] In some embodiments, the fan is a centrifugal fan, the first ventilation hole is located in the axial direction of the centrifugal fan, the second ventilation hole is located in the radial direction of the centrifugal fan, and multiple heat dissipation fins are distributed around the centrifugal fan in the circumferential direction.

[0009] Thus, the first ventilation hole is located on the axial direction of the centrifugal fan, the second ventilation hole is located on the radial direction of the centrifugal fan, and the air duct extends along the radial direction of the centrifugal fan, thereby achieving efficient airflow between the first ventilation hole, the air duct, and the second ventilation hole, improving heat dissipation efficiency, and reducing the height of the energy storage power supply on the axial direction of the centrifugal fan, making the overall energy storage power supply lighter and thinner.

[0010] In some implementations, the heat dissipation surface is provided with a heat-conducting portion that protrudes toward the inverter and is thermally coupled to the inverter's electronic components.

[0011] In this way, by protruding the heat-conducting part toward the inverter, the local thickness of the substrate is increased, and the heat-conducting part is thermally coupled with the inverter's electronic components, thereby reducing the contact thermal resistance between the energy storage power supply and the inverter and improving heat dissipation efficiency.

[0012] In some implementations, the first circuit is an inverter circuit used to convert direct current to alternating current, and the second circuit is either an LLC circuit or an MPPT circuit. The LLC circuit is used to convert direct current, and the MPPT circuit receives external photovoltaic power input to maximize the power of the photovoltaic power.

[0013] Thus, through thermal coupling between the first heat dissipation area and the inverter circuit, and thermal coupling between the second heat dissipation area and either an LLC circuit or an MPPT circuit, the heat pipe is thermally connected to both the first and second heat dissipation areas. This allows the heat pipe to quickly dissipate the large amount of heat generated by the inverter circuit, improving heat dissipation efficiency and promoting uniform heat distribution on the heat dissipation surface.

[0014] In some embodiments, a groove is formed on the heat dissipation surface to accommodate the heat pipe, which is then bonded or welded into the groove.

[0015] In this way, by forming grooves on the heat dissipation surface, the heat pipe is bonded or welded into the grooves, thereby connecting the heat pipe and the heat dissipation surface as one unit, reducing contact thermal resistance and improving heat transfer efficiency.

[0016] In some implementations, the outer profile of the heat pipe's cross-section matches the cross-sectional shape of the groove, and the side surface of the heat pipe facing the inverter is flush with the groove opening.

[0017] In this way, by matching the outer contour shape of the heat pipe's cross-section with the cross-sectional shape of the groove, and by making the surface of the heat pipe facing the inverter flush with the groove opening, the heat pipe is completely embedded in the substrate and can easily connect tightly with the groove wall, thereby reducing contact thermal resistance and maximizing heat conduction efficiency.

[0018] In some embodiments, the diameter of the heat pipe ranges from 5 mm to 8 mm; and / or, the total length of the heat pipe accounts for 80% to 95% of the length of the longest side of the housing.

[0019] In this way, by setting the diameter and / or length of the heat pipe within a reasonable range, the heat transfer of the heat pipe is matched with the specifications of the inverter, thereby achieving a good heat dissipation effect.

[0020] In some embodiments, the housing includes a square substrate having a long side and a short side, the length of the long side being greater than or equal to the length of the short side, a centrifugal fan and heat dissipation fins being disposed on the substrate, and the ratio of the length of the heat dissipation fins to the length of the short side being in the range of 1.1 to 1.5.

[0021] In this way, by keeping the ratio of the length of the heat dissipation fins to the short side length of the substrate within a reasonable range, the length of the air duct can be matched with the specifications of the inverter that the casing can accommodate, which is conducive to a reasonable match between heat dissipation power and heat generation power.

[0022] In some implementations, the centrifugal fan uses a first ventilation hole as the air inlet and a duct and a second ventilation hole as the air outlet, with the total area of ​​the first ventilation hole being larger than the area of ​​the second ventilation hole.

[0023] In this way, the first ventilation hole serves as the air inlet of the centrifugal fan, and the second ventilation hole serves as the air outlet of the centrifugal fan. The total area of ​​the first ventilation hole is larger than that of the second ventilation hole, which makes the air inlet flow rate greater than the air outlet flow rate. The reasonable design of losses is conducive to the smooth flow of heat dissipation air.

[0024] In some embodiments, the energy storage power source also includes a support portion connected to the housing and used to support the housing from the mounting surface of the energy storage power source.

[0025] In this way, by connecting the support part to the shell and making the shell detached from the energy storage power source mounting surface, the first ventilation hole and the second ventilation hole are exposed, ensuring that the airflow passes smoothly through the first ventilation hole and the second ventilation hole when the centrifugal fan is running, effectively ventilating and dissipating heat.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of the combination of energy storage power supply and inverter according to an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 The diagram shows the exploded structure of the energy storage power supply and inverter.

[0030] Figure 3 This is a schematic diagram of the energy storage power supply according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the energy storage power supply according to an embodiment of the present invention from another perspective;

[0032] Figure 5 This is an exploded structural diagram of the energy storage power supply according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the energy storage power supply without the bottom plate according to an embodiment of the present invention;

[0034] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure of the energy storage power source along the AA direction;

[0035] Figure 8 yes Figure 5 An enlarged schematic diagram of part B.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-Energy storage power supply; 10-Housing shell; 101-Accommodation area; 11-Base plate; 111-Heat-conducting part; 1111-Boss; 112-Groove; 113-Long side; 114-Short side; 12-Base plate; 121-First ventilation hole; 122-Second ventilation hole; 123-Main plate; 124-Mounting part; 13-Enclosure plate; 15-Heat dissipation surface; 151-First heat dissipation area; 152-Second heat dissipation area; 20-Fan; 21-Fan blade; 22-Bracket; 221-Chassis; 222-Mounting foot; 23-Centrifugal fan; 30-Heat dissipation fins; 31-Air duct; 32-Diverter plate; 40-Heat pipe; 41-First end; 42-Second end; 43-First pipe section; 44-Second pipe section; 50-Support part; 51-Foot pad;

[0038] 200 - Inverter; 210 - First circuit; 211 - Inductor coil; 212 - Transistor; 2101 - Inverter circuit; 220 - Second circuit. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and settings are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0042] Please see Figure 1 , Figure 2 and Figure 5The energy storage power supply 100 of this application embodiment includes a housing 10, a fan 20, multiple heat dissipation fins 30, and a heat pipe 40. The housing 10 houses an inverter 200 and a battery pack (not shown). The battery pack is electrically connected to the inverter 200. The housing 10 includes a heat dissipation surface 15 disposed inside the housing 10, which is thermally coupled to the inverter 200. Multiple heat dissipation fins 30 are spaced apart outside the housing 10 and opposite to the heat dissipation surface 15, with an air duct 31 formed between every two adjacent heat dissipation fins 30. The fan 20 is provided with… Outside the housing 10, the fan 20 forms a flowing airflow and flows through the air duct 31; the heat pipe 40 is used to supply the heat exchange medium for circulation. The heat pipe 40 is installed on the heat dissipation surface 15 and is thermally coupled to the heat dissipation surface 15. The heat pipe 40 is thermally connected to the first heat dissipation area 151 and the second heat dissipation area 152 of the heat dissipation surface 15. The first heat dissipation area 151 is thermally coupled to the first circuit 210 of the inverter 200, and the second heat dissipation area 152 is thermally coupled to the second circuit 220 of the inverter 200. The heat generation of the first circuit 210 is greater than the heat generation of the second circuit 220.

[0043] In the energy storage power supply 100 of this embodiment, a first heat dissipation area 151 and a second heat dissipation area 152 of the heat dissipation surface 15 are thermally connected via a heat pipe 40. The first heat dissipation area 151 is thermally coupled to the first circuit 210 of the inverter 200, and the second heat dissipation area 152 is thermally coupled to the second circuit 220 of the inverter 200. The heat generation of the first circuit 210 is greater than that of the second circuit 220. The heat exchange medium circulates within the heat pipe 40, thereby allowing the heat pipe 40 to quickly conduct heat to the inverter 200. Furthermore, the fan 20 forms a circulating airflow through the air duct 31. Combining liquid cooling and air cooling methods improves heat dissipation efficiency and promotes uniform heat distribution. Simultaneously, the housing 10 integrates heat dissipation and structural functions, reducing the number of components and installation complexity, which is beneficial for the miniaturization and weight reduction of the energy storage power supply 100, and improves portability.

[0044] For ease of explanation, this application describes the embodiment of the centrifugal fan 23 as an example of the fan 20. The radial direction of the centrifugal fan 23 is defined as the horizontal direction (X / Y direction as shown in the figure), and the axial direction of the centrifugal fan 23 is defined as the vertical direction (Z direction as shown in the figure).

[0045] Specifically, the heat dissipation surface 15 is the surface of the housing 10 facing the inverter 200. The heat dissipation surface 15 can be unobstructed and face the first circuit 210 and the second circuit 220 of the inverter 200, and partially contact some electronic components on the inverter 200. The heat generated by the first circuit 210 and the second circuit 220 on the inverter 200 can also be transferred to the heat dissipation surface 15 through thermal radiation, hot air, etc.

[0046] The housing 10 has a receiving space 101, in which the inverter 200 is housed. The housing 10 can be a flat, hollow cuboid structure, and the inverter 200 can be opposite the heat dissipation surface 15 along the Z direction. The first heat dissipation area 151 and the second heat dissipation area 152 can be opposite the first circuit 210 and the second circuit 220 along the Z direction, respectively. The heat pipe 40 is thermally connected to the first heat dissipation area 151 and the second heat dissipation area 152, and the heat exchange medium circulates in the heat pipe 40, thereby reducing the temperature of the first heat dissipation area 151 and the first circuit 210.

[0047] Optionally, the heat pipe 40 includes a first end 41 and a second end 42 opposite to each other, a first pipe section 43 connecting the first end 41, and a second pipe section 44 connecting the second end 42. The first end 41 may be located in a first heat dissipation region 151, and the second end 42 may be located in a second heat dissipation region 152 or may be located away from the first heat dissipation region 151 and the second heat dissipation region 152. The second end 42 is connected to the first pipe section 43 through the second pipe section 44, and the heat exchange medium in the heat pipe 40 circulates between the first end 41 and the second end 42. The heat pipe 40 may extend along a straight line, a broken line, a curve, or other various paths between the first end 41 and the second end 42.

[0048] Optionally, the first pipe section 43 and the second pipe section 44 can both extend in a straight line, so that the heat pipe 40 extends a shorter distance between the second end 42 and the first end 41, thereby achieving higher flow efficiency of the heat exchange medium between the second end 42 and the first end 41.

[0049] Please see Figure 1 and Figure 2 In some embodiments, the first circuit 210 is an inverter circuit 2101, which is used to convert direct current into alternating current. The second circuit 220 is either an LLC circuit or an MPPT circuit. The LLC circuit is used to convert direct current into alternating current, and the MPPT circuit receives external photovoltaic power input to maximize the power of photovoltaic power.

[0050] Thus, through the thermal coupling of the first heat dissipation area 151 with the inverter circuit 2101, and the thermal coupling of the second heat dissipation area 152 with either an LLC circuit or an MPPT circuit, the heat pipe 40 is thermally connected to the first heat dissipation area 151 and the second heat dissipation area 152. As a result, the heat pipe 40 can quickly dissipate the large amount of heat generated by the inverter circuit 2101, improve the heat dissipation efficiency, and promote the uniform distribution of heat on the heat dissipation surface 15.

[0051] Specifically, the heat generated by the inverter circuit 2101 is greater than that of either the LLC circuit or the MPPT circuit. The main heat generation of the inverter circuit 2101 comes from the inductor coil 211 and the transistor 212. The first end 41 of the heat pipe 40 is located in the first heat dissipation area 151 for heat exchange with the inverter circuit 2101. Because the heat generation of the inverter circuit 2101 is greater than that of other circuit areas, the temperature of the heat pipe 40 at its first end 41 is also greater than the temperature at its second end 42.

[0052] The inverter circuit 2101 may be provided with a plurality of inductors 211 and transistors 212. The first heat dissipation area 151 is thermally connected to the inductors 211 and transistors 212 on the inverter circuit 2101. The first pipe section 43 may extend along the arrangement direction of the inductors 211 and transistors 212 so that the heat pipe 40 can fully exchange heat with the inverter circuit 2101.

[0053] Optionally, the heat dissipation surface 15 and the heat pipe 40 on the heat dissipation surface 15 can be located below the inverter 200, and the inverter 200 can cover a portion of the heat dissipation surface 15 along the Z direction. Several inductor coils 211 and transistors 212 can be arranged sequentially along the left-right direction (X direction as shown in the figure), and correspondingly, the first tube segment 43 also extends along the X direction.

[0054] Furthermore, the second end 42 can be positioned away from the first heat dissipation area 151 relative to the first end 41. To shorten the extension path of the heat pipe 40, the second pipe segment 44 can extend linearly along the Y direction until it approaches the edge of the housing 10 away from the inverter circuit 2101. The first pipe segment 43 and the second pipe segment 44 can be connected by a curved pipe segment.

[0055] Please see Figures 4-6 In some embodiments, the housing 10 includes a base plate 11 and a bottom plate 12 facing each other. The inverter 200 is mounted on the base plate 11. The bottom plate 12 is disposed on the side of the base plate 11 away from the inverter 200 and covers the fan 20 and heat dissipation fins 30. The bottom plate 12 is provided with a first ventilation hole 121 and a second ventilation hole 122. The first ventilation hole 121 and the second ventilation hole 122 are disposed on both sides of the air duct 31.

[0056] Thus, the base plate 12 is set on the side of the substrate 11 away from the inverter 200 and covers the fan 20 and heat dissipation fins 30. The base plate 12 is provided with a first ventilation hole 121 and a second ventilation hole 122. The first ventilation hole 121 and the second ventilation hole 122 are set on both sides of the air duct 31, thereby enhancing the convection effect and making the structure more compact. While ensuring the structural strength of the casing 10, the weight is reduced, which is conducive to the miniaturization and weight reduction of the energy storage power supply 100.

[0057] Specifically, the base plate 12 can cover the side of the substrate 11 facing away from the inverter 200. The substrate 11 can be a flat plate, and the heat dissipation surface 15 is one side surface of the substrate 11. The base plate 12 includes a main plate 123 and a mounting portion 124. The main plate 123 can be substantially parallel to the substrate 11, and the main plate 123 and the substrate 11 are opposite to each other and spaced apart along the axial direction of the centrifugal fan 23. The mounting portion 124 is located at the edge of the base plate 12 and forms a certain angle with the main plate 123. The mounting portion 124 is fixedly connected to the edge of the substrate 11. A first ventilation hole 121 is formed on the main plate 123, and a second ventilation hole 122 is formed on the mounting portion 124. Both the first ventilation hole 121 and the second ventilation hole 122 penetrate the base plate 12 along the thickness direction of the base plate 12.

[0058] The centrifugal fan 23 and the heat dissipation fins 30 are both disposed in the space between the base plate 11 and the bottom plate 12. One side of the heat dissipation fins 30 along the axial direction of the centrifugal fan 23 can be fixedly connected to the base plate 11, and the other side can abut against the bottom plate 12. Along the axial direction of the centrifugal fan 23, the size of the heat dissipation fins 30 matches the distance between the bottom plate 12 (main body plate 123 or mounting part 124) and the base plate 11.

[0059] Optionally, the heat dissipation fins 30 and the substrate 11 can be integrally formed. The centrifugal fan 23 can be detachably fixed to the substrate 11 via the bracket 22.

[0060] The base plate 12, the substrate 11, and the heat dissipation fins 30 can all be made of materials with good thermal conductivity. For example, the base plate 12, the substrate 11, and the heat dissipation fins 30 can all be made of metal materials.

[0061] The energy storage power supply 100 houses the inverter 200 and can be installed inside the energy storage device 1000 or as part of the structural components of the energy storage device 1000. The mounting surface of the energy storage power supply 100 (not shown) includes, but is not limited to, the surface of the structural components of the energy storage device 1000, indoor or outdoor ground, walls, etc.

[0062] The base plate 12 faces the mounting surface of the energy storage power supply 100 and covers the air duct 31, which can effectively block dust, moisture and other pollutants and impurities from entering the energy storage power supply 100 or the inverter 200, thereby improving the protection level of the energy storage device 1000 and expanding its application range in complex environments.

[0063] Optionally, the housing 10 includes a surrounding plate 13 connected to the substrate 11. The surrounding plate 13 is connected to the edge of the substrate 11 and extends vertically away from the bottom plate 12. The surrounding plate 13 and the substrate 11 can together form a receiving area 101.

[0064] Please see Figure 5 and Figure 6In some embodiments, the fan 20 is a centrifugal fan 23, the first ventilation hole 121 is located in the axial direction of the centrifugal fan 23, the second ventilation hole 122 is located in the radial direction of the centrifugal fan 23, and a plurality of heat dissipation fins 30 are distributed around the centrifugal fan 23 in the circumferential direction.

[0065] Thus, the first ventilation hole 121 is located in the axial direction of the centrifugal fan 23, the second ventilation hole 122 is located in the radial direction of the centrifugal fan 23, and the air duct 31 extends in the radial direction of the centrifugal fan 23, thereby achieving efficient airflow between the first ventilation hole 121, the air duct 31, and the second ventilation hole 122, improving heat dissipation efficiency, and reducing the height of the energy storage power supply 100 in the axial direction of the centrifugal fan 23, making the energy storage power supply 100 lighter and thinner overall.

[0066] Specifically, the centrifugal fan 23 may include multiple fan blades 21 and a bracket 22. The multiple fan blades 21 are arranged around the circumference of the centrifugal fan 23 and are fixedly connected to the bracket 22. The centrifugal fan 23 is mounted on the housing 10 through the bracket 22.

[0067] Optionally, the bracket 22 includes a chassis 221 and mounting feet 222. The fan blades 21 are rotatably connected to the chassis 221, and the mounting feet 222 extend from the outer periphery of the chassis 221 and are fixedly connected to the base plate 12. When the centrifugal fan 23 is running, the fan blades 21 can be electrically driven to rotate relative to the housing 10, and the bracket 22 is fixedly connected to the housing 10.

[0068] Optionally, there may be multiple first ventilation holes 121, which may be arranged circumferentially along the centrifugal fan 23 or in a ring. The multiple first ventilation holes 121 may be axially opposite to the fan blades 21 of the centrifugal fan 23. In some embodiments, the centrifugal fan 23 is installed at the middle position of the housing 10 in the horizontal direction, and the first ventilation holes 121 are also located at the middle position of the housing 10 in the horizontal direction.

[0069] Optionally, the first ventilation hole 121 may be circular, elliptical, triangular, polygonal, strip-shaped, racetrack-shaped, teardrop-shaped, spindle-shaped, rhomboid, or other shapes, and this application does not limit this. For example, the first ventilation hole 121 is a strip-shaped hole, and the centripetal end of the first ventilation hole 121 is narrower than the distal end.

[0070] The second ventilation hole 122 may be located at or near the edge of the housing 10 along the radial direction of the centrifugal fan 23. There may be multiple second ventilation holes 122, which may be arranged along the edge of the housing 10.

[0071] Optionally, the second ventilation hole 122 may include, but is not limited to, small holes of various shapes such as circular, elliptical, triangular, polygonal, strip, racetrack-shaped, teardrop-shaped, spindle-shaped, rhomboid, or others. For example, the second ventilation hole 122 may include a strip-shaped hole, or it may include a hexagonal hole. The hexagonal second ventilation holes 122 may be distributed in a honeycomb pattern in a localized area of ​​the housing 10, thereby increasing the air outlet area.

[0072] Multiple heat dissipation fins 30 can radiate outwards from the centrifugal fan 23 towards the edge of the housing 10. One end of the heat dissipation fin 30 along its extension direction can be located near the outer periphery of the centrifugal fan 23, and the end of the heat dissipation fin 30 away from the centrifugal fan 23 can extend to the edge of the housing 10 in the radial direction of the centrifugal fan 23. The heat dissipation fins 30 can be fixedly connected to the housing 10.

[0073] Multiple heat dissipation fins 30 can form multiple air ducts 31 that extend radially along the centrifugal fan 23 and are dispersed in a radial pattern. The heat dissipation airflow is dispersed along the multiple air ducts 31, which also helps to improve heat dissipation efficiency and ensures that the heat is evenly distributed.

[0074] When the centrifugal fan 23 is running, it can draw air from outside the energy storage power supply 100 to form a cooling airflow. The centrifugal fan 23 can be axially inlet and radially outlet. That is, the cooler air outside the energy storage power supply 100 enters the housing 10 through the first ventilation hole 121 to form a cooling airflow. The cooling airflow absorbs the heat of the inverter 200 and is dispersed along multiple air ducts 31. Finally, it flows out of the housing 10 through the second ventilation hole 122 to achieve heat dissipation.

[0075] Centrifugal fan 23 can also dissipate heat through exhaust. That is, cooler air enters the housing 10 through the second ventilation hole 122 to absorb heat, and finally flows out of the housing 10 through the first ventilation hole 121 to achieve heat dissipation.

[0076] Optionally, the number of fan blades 21 in the centrifugal fan 23 ranges from 4 to 6. Optionally, the speed range of the centrifugal fan 23 is from 2000 rpm to 4000 rpm. This helps to reduce noise.

[0077] Please see Figure 2 In some embodiments, the heat dissipation surface is provided with a heat-conducting part 111 protruding toward the inverter 200, and the heat-conducting part 111 is thermally coupled to the electronic components of the inverter.

[0078] Thus, by protruding the heat-conducting part 111 toward the inverter, the local thickness of the substrate 11 is increased, and the heat-conducting part 111 is thermally coupled with the electronic components of the inverter 200, thereby reducing the contact thermal resistance between the energy storage power supply 100 and the inverter 200 and improving the heat dissipation efficiency.

[0079] Specifically, the heat-conducting part 111 can be integrated with the substrate 11. The heat-conducting part 111 may protrude slightly from the surface of the substrate 11. Both sides of the substrate 11 in its thickness direction can be flat surfaces, wherein the side of the substrate 11 facing the inverter 200 is provided with a heat-conducting part 111 protruding relative to the surface of the substrate 11, and the side of the substrate 11 away from the inverter 200 is provided with heat dissipation fins 30 connected to the substrate 11.

[0080] Optionally, the heat-conducting part 111 is made of a high thermal conductivity material, such as a metal. The heat-conducting part 111 can be integrally formed with the substrate 11, or it can be connected to the substrate 11 by means of welding or other methods. The heat-conducting part 111 is in direct contact with the inverter 200, and the heat-conducting part 111, the substrate 11, the heat dissipation fins 30, and the base plate 12 can all conduct heat. While the centrifugal fan 23 performs air cooling, the housing 10 can also achieve contact cooling.

[0081] Please see Figure 2 In some embodiments, the heat-conducting part 111 includes a plurality of bosses 1111, the distribution of which matches the circuit distribution on the inverter 200.

[0082] In this way, the distribution of the boss 1111 matches the circuit distribution on the inverter 200, so the boss 1111 can specifically increase the thickness of the substrate 11 in the area with greater heat generation, reduce the thermal resistance at the corresponding location, effectively improve heat dissipation efficiency, and also play a role in structural clearance, which is conducive to structural compactness and product miniaturization.

[0083] Specifically, the end face of the boss 1111 that contacts the inverter 200 can be a flat surface. The end face of the boss 1111 can be circular, square, elliptical, trapezoidal, polygonal, or other irregular shapes. The boss 1111 can be thermally coupled one-to-one with electronic devices on the inverter 200, and the shape and size of the end face of the boss 1111 can match the electronic device it is thermally coupled to. For example, the boss 1111 that is opposite to and in contact with the inductor coil 211 is circular, and the boss 1111 that is opposite to and in contact with the transistor 212 is square.

[0084] Please see Figure 1 and Figure 5 In some embodiments, a groove 112 is formed on the heat dissipation surface 15. The groove 112 is used to accommodate the heat pipe 40, and the heat pipe 40 is bonded or welded into the groove 112.

[0085] Thus, by forming a groove on the heat dissipation surface 15, the heat pipe 40 is bonded or welded into the groove 112, thereby connecting the heat pipe 40 and the heat dissipation surface 15 as one unit, reducing contact thermal resistance and improving heat transfer efficiency.

[0086] Optionally, the heat pipe 40 can be connected to the substrate 11 by welding, adhesive bonding, or other methods to minimize contact thermal resistance. For example, the heat pipe 40 can be welded to the wall of the groove 112, and the welding methods include, but are not limited to, soldering, brazing, and ultrasonic welding. Alternatively, an adhesive such as epoxy resin can be filled between the heat pipe 40 and the wall of the groove 112, and the epoxy resin can bond the heat pipe 40 to the wall of the groove 112 after curing.

[0087] Optionally, the extension path and length of the groove 112 are matched with those of the heat pipe 40. Optionally, the first segment 43 and the second segment 44 of the heat pipe 40 are perpendicular to each other, and the length of the first segment 43 is less than that of the second segment 44. The heat pipe 40 is generally L-shaped, and the groove 112 is also L-shaped.

[0088] Please see Figure 3 and Figure 5 In some embodiments, the outer contour shape of the heat pipe 40 is matched with the cross-sectional shape of the groove 112, and the side surface of the heat pipe 40 facing the inverter 200 is flush with the groove opening of the groove 112.

[0089] Thus, by matching the cross-sectional outer contour shape of the heat pipe 40 with the cross-sectional shape of the groove 112, and by making the surface of the heat pipe 40 facing the inverter 200 flush with the groove opening of the groove 112, the heat pipe 40 is completely embedded in the substrate 11 and the heat pipe 40 is easily and tightly connected to the groove wall of the groove 112, thereby reducing contact thermal resistance and maximizing heat conduction efficiency.

[0090] Specifically, the heat pipe 40 can be a flat pipe, that is, the outer contour shape of the cross-section of the heat pipe 40 can be approximately rectangular, and the surface of the heat pipe 40 facing the inverter 200 can be a side with a larger area to increase the heat exchange area between the heat pipe 40 and the inverter 200. The cross-sectional shape of the groove 112 can be a rectangle that matches the size of the heat pipe 40. The dimensions of the groove 112 in the X / Y / Z directions correspond to and match the dimensions of the heat pipe 40 to ensure that the heat pipe 40 is structurally stable in the groove 112 and can fully exchange heat with the housing 10 and the inverter 200.

[0091] Please see Figure 1 and Figure 5 In some embodiments, the diameter of the heat pipe 40 ranges from 5 mm to 8 mm (including the endpoints); and / or, the total length of the heat pipe 40 accounts for 80% to 95% of the length of the longest side 113 of the housing 10 (including the endpoints).

[0092] Thus, by setting the diameter and / or length of the heat pipe 40 within a reasonable range, the heat transfer capacity of the heat pipe 40 is matched with the specifications of the inverter 200, thereby achieving a good heat dissipation effect.

[0093] Specifically, by increasing the diameter of the heat pipe 40, the flow rate of the heat exchange medium inside the heat pipe 40 can be increased accordingly, thereby improving the heat transfer capacity of the heat pipe 40. For example, the heat pipe 40 can be selected with diameters of 5mm, 6mm, 6.5mm, 7mm, 8mm, etc.

[0094] The housing 10 is used to house the inverter 200. The size of the housing 10 is matched with the size of the inverter 200. The size of the inverter 200 typically limits the number and complexity of its components, thus the power of the inverter 200 is related to the size of the housing 10. The length of the heat pipe 40 is limited by the percentage range of its total length relative to the longest side 113 of the housing 10, making the length of the heat pipe 40 more compatible with the size and power of the inverter 200.

[0095] For example, please refer to Figure 5 The housing 10 can be a flat cuboid structure, with its longest side 113 being the long side 113. The heat pipe 40 includes a first pipe segment 43 and a second pipe segment 44, both of which are straight segments forming an angle with each other. The first pipe segment 43 can be approximately parallel to the long side 113, and the second pipe segment 44 can be approximately perpendicular to the long side 113. The total length of the heat pipe 40 can be 80%, 82%, 87%, 90%, 94%, or 85% of the length of the long side 113.

[0096] Please see Figure 6 In some embodiments, a flow divider 32 is provided between adjacent heat dissipation fins 30 along the circumferential direction of the centrifugal fan 23, and the flow divider 32 is located between the ends of the heat dissipation fins 30 away from the centrifugal fan 23.

[0097] Thus, by setting the flow divider 32 between adjacent heat dissipation fins 30, the airflow that spreads along the several air ducts 31 is further dispersed, thereby improving heat dissipation efficiency and promoting uniform heat distribution. In addition, the flow divider 32 is located between the ends of the heat dissipation fins 30 away from the centrifugal fan 23, which is conducive to the heat dissipation fins 30, the flow divider 32 and the housing 10 being integrally formed.

[0098] Specifically, multiple heat dissipation fins 30 radiate outwards in a radial pattern from the centrifugal fan 23 as the center. The circumferential distance between two adjacent heat dissipation fins 30 gradually increases from the end closer to the centrifugal fan 23 to the end farther away from the centrifugal fan 23. Both the flow divider 32 and the heat dissipation fins 30 can be integrally formed with the substrate 11. To avoid the flow divider 32 and the heat dissipation fins 30 being too close and difficult to mold, the flow divider is set in the area where the heat dissipation fins 30 are spaced relatively far apart circumferentially with respect to the centrifugal fan 23.

[0099] Combination Figure 4Along the axial direction of the centrifugal fan 23, the height of the diverter 32 can be the same as the height of the heat dissipation fins 30 at the same radial position. One side of the diverter 32 is connected to the substrate 11, and the other side can abut against the base plate 12.

[0100] By providing a flow divider 32 between adjacent heat dissipation fins 30, each air duct 31 can be further divided into two air ducts. Optionally, multiple heat dissipation fins 30 are evenly distributed along the circumference of the centrifugal fan 23, and a flow divider 32 is provided between every two heat dissipation fins 30. The flow divider 32 can evenly divide the air duct 31 in which it is located, thereby promoting uniform heat distribution.

[0101] Please see Figure 6 and Figure 7 In some embodiments, the heat dissipation fins 30 are tilted relative to the vertical direction, and the direction in which the heat dissipation fins 30 are tilted relative to the vertical direction is the same as the flow direction of the airflow introduced by the centrifugal fan 23 in the air duct 31, and the vertical direction is parallel to the axis of the centrifugal fan 23.

[0102] Thus, by tilting the heat dissipation fins 30 relative to the vertical direction in the same direction as the airflow introduced by the centrifugal fan 23 in the air duct 31, wind resistance is reduced, which helps to increase the flow rate of the heat dissipation airflow and thus improve the heat dissipation efficiency.

[0103] Specifically, the fan blades 21 of the centrifugal fan 23 have an angle relative to the outer circumference of the centrifugal fan 23. Different angles of the fan blades 21 result in different airflow directions from the centrifugal fan 23. The heat dissipation fins 30 are slightly tilted relative to the vertical direction along with the airflow direction of the centrifugal fan 23, so that the heat dissipation fins 30 form an angle α with the vertical direction.

[0104] Please see Figures 6-8 In some embodiments, the angle α between the heat dissipation fins 30 and the vertical direction (Z direction as shown in the figure) ranges from 15° to 30°.

[0105] In this way, by setting the angle α between the heat dissipation fins 30 and the vertical direction within a reasonable range, it is beneficial for the air duct 31 to form a shape that matches the heat dissipation airflow, thereby improving the heat dissipation efficiency.

[0106] Specifically, the angle α between the heat dissipation fins 30 and the vertical direction can be 15°, 18°, 20°, 21°, 23°, 27.5°, 30°, etc. The heat dissipation fins 30 maintain an upright posture on the substrate 11, defining the air duct 31 that runs radially through the centrifugal fan 23, while also coordinating with the airflow direction of the centrifugal fan 23 to reduce air resistance.

[0107] Furthermore, the angle α between the heat dissipation fins 30 and the vertical direction is in the range of 20° to 30°, which can further improve the heat dissipation efficiency.

[0108] Please see Figure 5 and Figure 6 In some embodiments, the housing 10 includes a square base plate 11 having a long side 113 and a short side 114, the length of the long side 113 being greater than or equal to the length of the short side 114, the centrifugal fan 23 and the heat dissipation fins 30 being disposed on the base plate 11, and the ratio of the length of the heat dissipation fins 30 to the length of the short side 114 being in the range of 1.1 to 1.5.

[0109] Thus, by ensuring that the ratio of the length of the heat dissipation fins 30 to the length of the short side 114 of the substrate 11 is within a reasonable range, the length of the air duct 31 is matched with the specifications of the inverter 200 that the housing 10 can accommodate, which is conducive to a reasonable match between heat dissipation power and heat generation power.

[0110] Specifically, the square substrate 11 has two long sides and two short sides 114. Multiple heat dissipation fins 30 are arranged around the centrifugal fan 23, extending radially from the outer periphery of the centrifugal fan 23 to either the short side 114 or the long side 113 of the substrate 11. Each heat dissipation fin 30 may be non-uniform, and correspondingly, the length ratio of each heat dissipation fin 30 to the short side 114 is also non-uniform. For example, the length ratio of the heat dissipation fin 30 to the short side 114 may be in the range of 1.1–1.2, 1.16–1.3, 1.2–1.35, 1.28–1.4, 1.3–1.5, etc.

[0111] In some embodiments, the centrifugal fan 23 uses the first ventilation hole 121 as the air inlet and the air duct 31 and the second ventilation hole 122 as the air outlet, and the total area of ​​the first ventilation hole 121 is larger than the area of ​​the second ventilation hole 122.

[0112] Thus, by using the first ventilation hole 121 as the air inlet of the centrifugal fan 23 and the second ventilation hole 122 as the air outlet of the centrifugal fan 23, the total area of ​​the first ventilation hole 121 is greater than the area of ​​the second ventilation hole 122, thereby making the air inlet flow greater than the air outlet flow. This reasonable design of losses is conducive to the smooth flow of heat dissipation air.

[0113] Specifically, each first ventilation hole 121 may have the same shape and size, or it may have different shapes and sizes. Similarly, each second ventilation hole 122 may have the same shape and size, or it may have different shapes and sizes. To facilitate uniform heat distribution carried by airflow, the first ventilation holes 121 may be evenly distributed at the positions opposite to the fan blades 21 on the base plate 12, and the second ventilation holes 122 may be evenly distributed along the edge of the base plate 12.

[0114] Please see Figure 4 and Figure 5 In some embodiments, the total area of ​​the first ventilation hole 121 ranges from 80 mm. 2~120mm 2 ; and / or, the total area of ​​the second ventilation hole 122 is 60 mm². 2 ~90mm 2 .

[0115] Thus, by ensuring that the areas of the first ventilation hole 121 and the second ventilation hole 122 are within a reasonable range, the cross-sectional area of ​​the heat dissipation airflow is optimized, the flow effect is enhanced, the flow rate and velocity of the heat dissipation airflow are increased, and the heat dissipation efficiency is improved.

[0116] Specifically, the total area of ​​the first ventilation hole 121 can be 80 mm². 2 83mm 2 87mm 2 92mm 2 95mm 2 106mm 2 110mm 2 120mm 2 The total area of ​​the second ventilation hole 122 can be 60mm². 2 70mm 2 72mm 2 80mm 2 81mm 2 90mm 2 .

[0117] When the first ventilation hole 121 serves as the air inlet of the centrifugal fan 23 and the second ventilation hole 122 serves as the air outlet of the centrifugal fan 23, the total area of ​​the first ventilation hole 121 is larger than the area of ​​the second ventilation hole 122. For example, the total area of ​​the first ventilation hole 121 is 118 mm². 2 Furthermore, the total area of ​​the second ventilation hole 122 is 88mm². 2 For example, the total area of ​​the first ventilation hole 121 is 84 mm². 2 Furthermore, the total area of ​​the second ventilation hole 122 is 66mm². 2 .

[0118] In one specific embodiment, the diameter of the second ventilation hole 122 is 35 mm, and the spacing between adjacent second ventilation holes 122 is 812 mm. Some of the second ventilation holes 122 may be arranged in a honeycomb pattern.

[0119] Please see Figure 4 and Figure 5 In some embodiments, the energy storage power supply 100 further includes a support portion 50, which is connected to the housing 10 and is used to support the housing 10 from the mounting surface of the energy storage power supply 100 (not shown).

[0120] Thus, by connecting the support part 50 to the housing 10 and making the housing 10 separate from the mounting surface of the energy storage power supply 100, the first ventilation hole 121 and the second ventilation hole 122 are exposed, ensuring that the airflow passes smoothly through the first ventilation hole 121 and the second ventilation hole 122 when the centrifugal fan 23 is running, effectively ventilating and dissipating heat.

[0121] Specifically, the support portion 50 may include a plurality of foot pads 51, which are spaced apart in opposite directions. The foot pads 51 may be detachably connected to the base plate 12, and the ends of the foot pads 51 away from the base plate 12 are supported on the mounting surface.

[0122] Optionally, the foot pad 51 includes a shock-absorbing structure (not shown), such as an elastic element, a flexible filler layer, or a foam layer, to reduce vibration of the housing 10 during operation of the centrifugal fan 23.

[0123] In the description of embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0125] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An energy storage power source, characterized in that, include: A housing for housing an inverter and a battery pack, the battery pack being electrically connected to the inverter, the housing including a heat dissipation surface disposed on the inner side of the housing, the heat dissipation surface being thermally coupled to the inverter; Multiple heat dissipation fins are spaced apart on the outside of the housing and opposite to the heat dissipation surface, and an air duct is formed between every two adjacent heat dissipation fins. A fan is disposed outside the housing, and the fan generates airflow that flows through the air duct. and A heat pipe is used to supply a circulating heat exchange medium. The heat pipe is installed on the heat dissipation surface and is thermally coupled to the heat dissipation surface. The heat pipe is thermally connected to a first heat dissipation area and a second heat dissipation area of ​​the heat dissipation surface. The first heat dissipation area is thermally coupled to a first circuit of the inverter, and the second heat dissipation area is thermally coupled to a second circuit of the inverter. The heat generation of the first circuit is greater than the heat generation of the second circuit.

2. The energy storage power supply according to claim 1, characterized in that, The housing includes a base plate and a bottom plate, the inverter is mounted on the base plate, the bottom plate is disposed on the side of the base plate away from the inverter and covers the fan and the heat dissipation fins, and the bottom plate is provided with a first ventilation hole and a second ventilation hole, which are disposed on both sides of the air duct.

3. The energy storage power supply according to claim 2, characterized in that, The fan is a centrifugal fan. The first ventilation hole is located on the axial direction of the centrifugal fan, the second ventilation hole is located on the radial direction of the centrifugal fan, and a plurality of heat dissipation fins are distributed around the centrifugal fan along its circumference.

4. The energy storage power supply according to claim 1, characterized in that, The heat dissipation surface is provided with a heat-conducting part that protrudes toward the inverter, and the heat-conducting part is thermally coupled to the inverter electronic components.

5. The energy storage power supply according to claim 1, characterized in that, The first circuit is an inverter circuit, which is used to convert direct current to alternating current. The second circuit is either an LLC circuit or an MPPT circuit. The LLC circuit is used to convert direct current to alternating current, and the MPPT circuit receives external photovoltaic power input to maximize the power of photovoltaic power.

6. The energy storage power supply according to claim 1, characterized in that, A groove is formed on the heat dissipation surface to accommodate the heat pipe, which is then bonded or welded to the groove.

7. The energy storage power supply according to claim 6, characterized in that, The outer contour shape of the heat pipe's cross-section matches the cross-sectional shape of the groove, and the side surface of the heat pipe facing the inverter is flush with the opening of the groove.

8. The energy storage power supply according to claim 6, characterized in that, The diameter of the heat pipe is in the range of 5mm to 8mm; and / or, The total length of the heat pipe accounts for 80% to 95% of the length of the longest side of the housing.

9. The energy storage power supply according to claim 3, characterized in that, The substrate has a long side and a short side, the length of the long side is greater than or equal to the length of the short side, the centrifugal fan and the heat dissipation fins are both disposed on the substrate, and the ratio of the length of the heat dissipation fins to the length of the short side is in the range of 1.1 to 1.

5.

10. The energy storage power supply according to claim 3, characterized in that, The centrifugal fan uses the first ventilation hole as the air inlet and the air duct and the second ventilation hole as the air outlet. The total area of ​​the first ventilation hole is larger than the area of ​​the second ventilation hole.

11. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply also includes a support portion, which is connected to the housing and is used to support the housing from the mounting surface of the energy storage power supply.

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