Energy storage product

Abstract

The utility model discloses an energy storage product, and belongs to the technical field of energy storage. The energy storage product comprises an upper cover and a rear shell. The upper cover and the rear shell are enclosed to form a closed cavity; an energy storage battery is arranged on the upper half portion in the cavity in the length direction of the cavity, and an energy conversion plate is arranged on the lower half portion in the cavity. A plurality of groups of power devices are arranged on one surface, facing the rear shell, of the energy conversion plate, and a power device heat dissipation device is arranged on the surface of each group of power devices; the power device heat dissipation device comprises a first heat conduction silver paste layer, a first heat dissipation layer, a second heat conduction silver paste layer, a second heat dissipation layer and a heat conduction pad which are sequentially arranged on the surface of a power device. A plurality of heat dissipation strips are arranged on the outer surface of the part, opposite to the energy conversion plate, of the rear shell; a plurality of fans are arranged on the face, facing the upper cover, of the energy conversion plate, and an air inlet structure and an air outlet structure are arranged at the positions, opposite to the energy conversion plate, of the rear shell. According to the scheme, the heat dissipation efficiency is remarkably improved, the temperature control performance is enhanced, and the system reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technology field especially relates to a kind of energy storage products. BACKGROUND

[0002] Energy storage product heat dissipation is mostly relied on the natural convection and heat radiation of air to dissipate heat, and such heat dissipation efficiency is low, not applicable to high power density energy storage products.

[0003] With the rapid development of energy storage technology, high power density energy storage products gradually become market mainstream. However, the existing energy storage product heat dissipation scheme mostly relies on the natural convection and heat radiation of air, and this heat dissipation mode has obvious limitations:

[0004] (1) Low heat dissipation efficiency: the heat dissipation efficiency of natural convection and heat radiation is relatively low, and it cannot effectively cope with the large amount of heat generated by high power density energy storage products during operation.

[0005] (2) Unstable temperature control: due to insufficient heat dissipation efficiency, the internal temperature of energy storage equipment is easy to rise, leading to unstable temperature control, and further affecting the performance and life of the equipment.

[0006] (3) Poor applicability: for high power density application scenarios, such as large-capacity battery energy storage systems, fast charging and discharging equipment, etc., the heat dissipation mode of natural convection and heat radiation is difficult to meet the strict heat dissipation requirements of the application scenarios.

[0007] Therefore, the existing heat dissipation mode cannot meet the heat dissipation requirements of high power density energy storage products, and a high-efficiency and reliable heat dissipation solution is urgently needed to ensure the stability and safety of energy storage equipment under high load operation conditions. SUMMARY

[0008] The utility model provides a kind of high-efficiency heat dissipation device suitable for high power density energy storage products to the above problems of prior art, and significantly improves heat dissipation efficiency by improving heat dissipation structure, to ensure temperature control and performance stability of equipment under high load operation.

[0009] To achieve the above purpose, the utility model provides an energy storage product, which comprises an upper cover and a rear shell.

[0010] The upper cover and the rear shell form a closed chamber.

[0011] An energy storage battery is arranged in the upper half of the chamber along the length direction of the chamber, and an energy conversion plate is arranged in the lower half of the chamber.

[0012] The one side of the energy conversion plate facing the back shell is provided with a plurality of groups of power devices, and the surface of each group of power devices is provided with a power device heat dissipation device; the power device heat dissipation device comprises a first heat-conductive silver paste layer, a first heat dissipation layer, a second heat-conductive silver paste layer, a second heat dissipation layer and a heat-conductive pad arranged in sequence on the surface of the power device; the heat-conductive pad is tightly attached to the inner surface of the back shell and the second heat dissipation layer; the outer surface of the part of the back shell opposite to the energy conversion plate is provided with a plurality of heat dissipation strips along the length direction of the cavity.

[0013] The one side of the energy conversion plate facing the upper cover is provided with a plurality of fans, and the position of the back shell opposite to the energy conversion plate is provided with an air inlet structure and an air outlet structure.

[0014] Preferably, the one end of the energy conversion plate away from the energy storage battery is provided with a first air inlet area, and the position of the back shell opposite to the first air inlet area is provided with a second air inlet area; the position of the back shell opposite to the one end of the energy conversion plate close to the energy storage battery is provided with an air outlet area; the first air inlet area, the second air inlet area and the air outlet area are all provided with heat dissipation holes.

[0015] Preferably, the one end of the energy conversion plate close to the energy storage battery is provided with two fans, and the one end of the energy conversion plate away from the energy storage battery is provided with two fans.

[0016] Preferably, the first heat dissipation layer is a ceramic sheet, the second heat dissipation layer is an aluminum sheet, and the heat dissipation strip is an aluminum strip.

[0017] The utility model discloses a following beneficial effect has: the utility model discloses the energy storage product including upper cover and rear shell, upper cover and rear shell enclose and form the closed chamber, set up the energy storage battery in the chamber along the upper half of chamber length direction, and the lower half sets up the energy conversion board, the energy conversion board is provided with a plurality of groups of power devices to the rear shell one side, and each group power device is provided with power device heat abstractor on the surface, and power device heat abstractor includes first heat conduction silver paste layer, first radiating layer, second heat conduction silver paste layer, second radiating layer, heat conduction pad that set up in power device surface in proper order, and heat conduction pad is closely combined with second radiating layer and the inner surface of rear shell, and the outer surface of the part of rear shell opposite energy conversion board is provided with a plurality of radiating strips along the length direction of chamber, and the energy conversion board is provided with a plurality of fans to the upper cover one side, and the rear shell is provided with air inlet structure and air outlet structure to the position opposite energy conversion board, and the utility model discloses the heat of power device is transmitted to the energy storage product outside through the mode of setting up multilayer heat conduction heat abstractor on the surface of power device, and the heat in the energy storage product is discharged in combination with a plurality of fans, and the scheme of the utility model discloses is improved the heat dissipation efficiency, enhanced the temperature control performance, optimized the energy storage product internal space, improved system reliability, improved user experience, is especially applicable to the energy storage product of high power density. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The energy storage product assembly drawing provided for the utility model embodiment.

[0019] Figure 2 The energy storage product internal structure schematic view provided for the utility model embodiment.

[0020] Figure 3 The energy storage product energy conversion board towards rear shell one side structure schematic view provided for the utility model embodiment.

[0021] Figure 4 The energy storage product energy conversion board towards rear shell one side structure schematic view provided for the utility model embodiment.

[0022] Figure 5 The energy storage product's sectional view provided for the utility model embodiment.

[0023] Figure 6 The rear shell structure schematic view of the energy storage product provided for the utility model embodiment.

[0024] In the drawings:

[0025] 1, upper cover;

[0026] 2, rear shell;21, radiating strip;22, second air inlet area;23, air outlet area;

[0027] 3. Energy storage battery;

[0028] 4. Energy conversion board; 41. Power device; 42. Power device heat dissipation device; 421. First thermally conductive silver paste layer; 422. First heat dissipation layer; 423. Second thermally conductive silver paste layer; 424. Second heat dissipation layer; 425. Thermal pad; 43. Fan; 44. First air intake area;

[0029] 5. Heat dissipation holes. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] The technical solution of this utility model provides a layout for energy storage products, especially a layout for heat dissipation devices, which is applicable to photovoltaic energy storage products, battery energy storage products, and new energy energy storage products.

[0032] like Figures 1-5 As shown, this utility model embodiment provides an energy storage product, which includes an upper cover 1 and a rear shell 2;

[0033] The upper cover 1 and the rear shell 2 together form a closed chamber. In this embodiment of the invention, the upper cover 1 and the rear shell 2 are mainly made of aluminum alloy. Aluminum alloy has the advantages of low cost and good heat dissipation.

[0034] An energy storage battery 3 is disposed in the upper half of the chamber along its length, and an energy conversion board 4 is disposed in the lower half. In this embodiment of the present invention, the energy storage product is a photovoltaic energy storage product, and the main function of the energy conversion board 4 is to realize the energy conversion between DC48V (battery), DC80-320V (photovoltaic), and AC220V, including boost, buck, rectification, and inverter circuits.

[0035] The energy conversion plate 4 has multiple sets of power devices 41 on the side facing the rear shell 2. Each set of power devices 41 has a power device heat dissipation device 42 on its surface. The power device heat dissipation device 42 includes a first thermally conductive silver paste layer 421, a first heat dissipation layer 422, a second thermally conductive silver paste layer 423, a second heat dissipation layer 424, and a thermal pad 425 sequentially disposed on the surface of the power device 41. The thermal pad 425 is in close contact with the second heat dissipation layer 424 and the inner surface of the rear shell 2. The outer surface of the portion of the rear shell 2 opposite to the energy conversion plate 4 has multiple heat dissipation strips 21 disposed along the length of the chamber.

[0036] The utility model discloses a power device 41 includes the power inductance, power MOS pipe in boost, buck, rectifier, inverter circuit. The first heat conduction silver paste layer 421 is coated in the surface of power device 41, the first heat dissipation layer 422 is arranged in the one side of first heat conduction silver paste layer 421 away from power device 41, the second heat conduction silver paste layer 423 is coated in the one side of first heat dissipation layer 422 away from first heat conduction silver paste layer 421, another side of second heat conduction silver paste layer 423 is provided with second heat dissipation layer 424, and heat conduction pad 425 is arranged between second heat dissipation layer 424 and the inner surface of rear shell 2. The heat conduction pad 425 has certain viscosity and elasticity. The layer in power device heat dissipation device 42 is all closely combined, and the heat conduction pad 425 is closely combined with the inner surface of rear shell 2. The above design, through the heat conduction of layer by layer mode, the heat generated by power device 41 is transferred to rear shell 2, and then is transferred out through the shell of rear shell 2 and the plurality of heat dissipation strips 21 arranged on the outer surface of rear shell 2, which ensures the rapid and uniform transmission of heat from power device 41 to the shell, greatly improves the heat dissipation efficiency, and avoids the local overheating phenomenon.

[0037] In the embodiment of the utility model, the outer surface of the rear shell 2 and the energy storage battery 3 is not provided with the heat dissipation aluminum strip 21, because the material of the rear shell 2 is aluminum alloy, and the area of the position contacting with the energy storage battery 3 is sufficient, and the heat dissipation effect can meet the requirements.

[0038] In some embodiments of the utility model, the first heat dissipation layer 422 is a ceramic sheet, the second heat dissipation layer 424 is an aluminum sheet, the heat dissipation strip 21 is an aluminum strip, and the material of the ceramic sheet is aluminum oxide. The thermal conductivity coefficients and costs of different heat dissipation materials are different, and in actual application, the materials of each layer can be selected according to the budget.

[0039] As shown in Figure 3 The energy conversion plate 4 of the embodiment of the utility model has a total of 3 groups of power devices 41 on the side facing the rear shell 2, each group includes 4 power devices, and each group of power devices is provided with a power device heat dissipation device. In actual application, the power devices with similar positions are reasonably grouped and arranged on the circuit design, and are designed into regular structures as much as possible to facilitate the sharing of heat dissipation devices. The reasonable grouping design and arrangement can improve the heat dissipation effect and reduce the heat dissipation cost.

[0040] The one side of the energy conversion plate 4 facing the upper cover 1 is provided with a plurality of fans 43, and the rear shell 2 is provided with air inlet structure and air outlet structure opposite to the energy conversion plate 4. The one side of the energy conversion plate 4 facing the upper cover 1 is also provided with a large number of devices, and the devices also have heat dissipation requirements. Therefore, in the embodiment of the utility model, a plurality of fans 43 are arranged on the one side of the energy conversion plate 4 facing the upper cover 1. In actual application, the positions of the fans 43 are determined according to the positions of the devices arranged on the energy conversion plate 4. As shown in the figure, Figure 2 In the embodiment of the utility model, two fans 43 are arranged on the one end of the energy conversion plate 4 close to the energy storage battery 3, and two fans 43 are arranged on the one end of the energy conversion plate 4 away from the energy storage battery 3.

[0041] In the embodiment of the utility model, in order to enhance the air circulation in the cavity and improve the heat dissipation effect, the first air inlet area 44 is arranged on the one end of the energy conversion plate 4 away from the energy storage battery 3, and the second air inlet area 22 is arranged on the rear shell 2 opposite to the first air inlet area 44; the air outlet area 23 is arranged on the rear shell 2 opposite to the one end of the energy conversion plate 4 close to the energy storage battery 3; and the first air inlet area 44, the second air inlet area 22 and the air outlet area 23 are all provided with heat dissipation holes 5. Among them, the two fans 43 are close to the air outlet area 23, and the two fans 43 are close to the first air inlet area 44 and the second air inlet area 22. Through the design of forced convection fans, the internal heat can be continuously and effectively discharged, the internal temperature of the energy storage product is kept stable, the service life of the equipment is prolonged, and the working reliability is improved.

[0042] The compact design of the multi-layer heat conduction heat dissipation device and the fan not only improves the heat dissipation efficiency, but also optimizes the internal space layout, so that the overall structure is more compact and reasonable.

[0043] The utility model discloses have as follows beneficial effect: the utility model discloses energy storage product including upper cover and rear shell, upper cover and rear shell enclose and form the closed chamber, in the chamber along the chamber length direction's upper half part is provided with energy storage battery, and the lower half part is provided with energy conversion board, the one side of energy conversion board towards rear shell is provided with multiple groups power device, and each group power device's surface is provided with power device heat abstractor, power device heat abstractor includes the first heat conduction silver paste layer, first radiating layer, second heat conduction silver paste layer, second radiating layer, heat conduction pad that set gradually in power device surface, heat conduction pad with second radiating layer and the inner surface of rear shell are closely combined, the outer surface of the part of rear shell with energy conversion board opposite is provided with multiple radiating strips along the length direction of chamber, the one side of energy conversion board towards upper cover is provided with a plurality of fans, and the position of rear shell with energy conversion board opposite is provided with air inlet structure and air outlet structure, through the mode of setting multiple layer heat conduction heat abstractor on power device surface to the heat of power device is transmitted to energy storage product outside, and combining a plurality of fans, the heat in energy storage product is discharged, the scheme of the utility model has improved the heat dissipation efficiency, has strengthened temperature control performance, has optimized energy storage product internal space, has promoted system reliability, has improved user experience, is especially applicable to high power density's energy storage product.

[0044] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, not restrictive, and the person skilled in the art can make many forms of deformation under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection of the utility model.

Claims

1. An energy storage product, characterized in that, The energy storage product comprises an upper cover (1) and a rear shell (2); The upper cover (1) and the rear shell (2) enclose a closed chamber; An energy storage battery (3) is arranged in the upper half of the chamber along the length direction of the chamber, and an energy conversion board (4) is arranged in the lower half of the chamber; A plurality of groups of power devices (41) are arranged on one side of the energy conversion board (4) facing the rear shell (2), and a power device heat dissipation device (42) is arranged on the surface of each group of power devices (41); the power device heat dissipation device (42) comprises a first heat-conductive silver paste layer (421), a first heat dissipation layer (422), a second heat-conductive silver paste layer (423), a second heat dissipation layer (424) and a heat-conductive pad (425) arranged in sequence on the surface of the power device (41); the heat-conductive pad (425) is tightly attached to the inner surface of the rear shell (2) and the second heat dissipation layer (424); a plurality of heat dissipation strips (21) are arranged on the outer surface of the part of the rear shell (2) opposite to the energy conversion board (4) along the length direction of the chamber; A plurality of fans (43) are arranged on one side of the energy conversion board (4) facing the upper cover (1), and an air inlet structure and an air outlet structure are arranged on the rear shell (2) opposite to the energy conversion board (4).

2. The energy storage product of claim 1, wherein, A first air inlet area (44) is arranged at one end of the energy conversion board (4) away from the energy storage battery (3), and a second air inlet area (22) is arranged on the rear shell (2) opposite to the first air inlet area (44); an air outlet area (23) is arranged on the rear shell (2) opposite to one end of the energy conversion board (4) close to the energy storage battery (3); and heat dissipation holes (5) are arranged in the first air inlet area (44), the second air inlet area (22) and the air outlet area (23).

3. The energy storage product of claim 2, wherein, Two fans (43) are arranged at one end of the energy conversion board (4) close to the energy storage battery (3), and two fans (43) are arranged at one end of the energy conversion board (4) away from the energy storage battery (3).

4. The energy storage product of claim 1, wherein, The first heat dissipation layer (422) is a ceramic sheet, the second heat dissipation layer (424) is an aluminum sheet, and the heat dissipation strip (21) is an aluminum strip.

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