Small energy storage system container

Abstract

The present application discloses a small energy storage system container, wherein the container includes: a box body, an air duct, an air conditioner, and a battery cluster. The battery cluster is arranged inside the box body, a first air cavity is opened in the middle of the battery cluster, and a second air cavity is arranged between the left and right inner walls of the box body and the battery cluster. The air outlet of the air conditioner is connected to the air inlet of the air duct. The air duct guides the air intake in the box body, and the air conditioning cold air in the air conditioner is uniformly supplied to each battery pack on the battery cluster for heat dissipation through the first air cavity and the air duct, and the battery cluster is exhausted for convection through the second air cavity. The first air cavity is connected to the air outlet of the air duct, and the second air cavity is located on both sides of the inside of the box body. Through the present application, better heat dissipation of the small energy storage system can be achieved, and the long-term stable and efficient operation of the small energy storage system can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery energy storage technology, and in particular to a small energy storage system container. Background Art

[0002] Electricity demand is significantly uneven across the day. During peak demand periods, the load is excessively high, resulting in insufficient power on the supply side. Meanwhile, during valley demand periods, the supply side experiences significant power redundancy. To mitigate the resulting high power supply costs and burden on electricity users, the power industry is increasingly adopting small-scale energy storage systems (typically in the 0.5MWh to 1MWh battery capacity range) to smooth out peak loads. This measure plays a significant role in balancing grid loads.

[0003] Due to space constraints and component cost constraints, small energy storage systems in related technologies lack external centrifugal fans to extract air from the system, preventing airflow from effectively passing through the battery pack, which has high flow resistance, to achieve strong convection cooling. Furthermore, related technologies also lack the ability to evenly distribute the air outlets of built-in wall-mounted air conditioners, preventing the even distribution of cooling capacity within the system. Heat is often dissipated solely through diffusion of cooling capacity within the cabinet and weak convection, thus failing to achieve optimal cooling. This results in excessively high temperatures in the centrally located battery pack, poor temperature consistency across the system, and inability to guarantee long-term, stable, and efficient operation. Summary of the Invention

[0004] The embodiments of the present application provide a small energy storage system container to provide better heat dissipation and ensure the long-term stable and efficient operation of the small energy storage system.

[0005] The embodiments of this application adopt the following technical solutions:

[0006] The embodiment of the present application provides a small energy storage system container, wherein the container comprises: a box body (1), an air duct (2), an air conditioner (13), and a battery cluster (6); the battery cluster (6) is arranged inside the box body (1); a first air cavity (3) is provided in the middle of the battery cluster (6); a second air cavity (7) is provided between the inner wall of the box body (1) and the battery cluster (6); the air outlet of the air conditioner (13) is connected to the air inlet of the air duct (2);

[0007] in,

[0008] The air duct (2) guides the air intake in the box (1), and passes through the first air cavity (3) and the air duct (2), so that the air conditioning cold air in the air conditioner (13) is evenly supplied to the individual battery packs (602) on the battery cluster (6) for heat dissipation, and the battery cluster (6) is exhausted and convected through the second air cavity (7). The first air cavity (3) is connected to the air outlet of the air duct (2), and the second air cavity (7) is located on both sides of the interior of the box (1).

[0009] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0010] The container includes a housing, air ducts, air conditioners, and a battery cluster. The first air cavity and the air ducts direct air flow into the housing, while the second air cavity draws air for convection within the housing, creating a system-wide heat dissipation airflow circulation system. Furthermore, the housing, air ducts, air conditioners, and battery clusters are compactly arranged, reducing component costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0012] Figure 1 This is an axonometric view of the internal body of the small energy storage system container in the embodiment of the present application;

[0013] Figure 2 This is a top view of the top of the small energy storage system container in an embodiment of the present application;

[0014] Figure 3 This is an axonometric view of the overall appearance of the small energy storage system container in the embodiment of the present application;

[0015] Figure 4 This is an axonometric diagram of the air duct and the first air cavity of the container of the small energy storage system in the embodiment of the present application;

[0016] Figure 5 This is a side view of the air duct and first air cavity of the small energy storage system container in an embodiment of the present application.

[0017] Wherein, the reference numerals:

[0018] 1 is the box, 2 is the air duct, 201 is the air inlet, 202 is the air outlet, 3 is the first air cavity, 4 is the horizontal diverter plate, 401 is the fixed long plate, 402 is the sliding short plate, 5 is the vertical guide plate, 6 is the battery cluster, 601 is the battery support frame, 602 is the battery pack, 7 is the second air cavity, 701 is the air cavity partition, 8 is the high-voltage box, 9 is the UPS power supply, 10 is the fuse, 11 is the power transformer, 12 is the energy storage converter (PCS) module, 13 is the air conditioner, and 14 is the fan (axial flow). DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0021] The embodiment of the present application provides a small energy storage system container, such as Figures 1 to 3 As shown, an axonometric view of the internal body, a top view, and an axonometric view of the overall appearance of the small energy storage system container in an embodiment of the present application are respectively provided. The small energy storage system container, wherein the container includes: a box body 1, an air duct 2, an air conditioner 13, and a battery cluster 6. The battery cluster 6 is arranged inside the box body 1, and a first air cavity 3 is opened in the middle of the battery cluster 6. A second air cavity 7 is provided between the inner wall of the box body 1 and the battery cluster 6, wherein the air outlet of the air conditioner 13 is connected to the air inlet of the air duct 2;

[0022] in,

[0023] The air duct 2 guides the air intake in the box 1, and passes through the first air cavity 3 and the air duct 2, so that the air-conditioned cold air in the air conditioner 13 is evenly supplied to each battery pack 602 on the battery cluster 6 for heat dissipation, and the battery cluster 6 is exhausted and convected through the second air cavity 7. The first air cavity 3 is connected to the air outlet of the air duct 2, and the second air cavity 7 is located on both sides of the inside of the box 1.

[0024] The overall box body 1 is a packaging structure. It can be understood that the overall geometry generally adopts the form of a cube or a rectangular parallelepiped, and other geometric structures can also be adopted. The overall geometric structure will not have a substantial impact on the present invention.

[0025] Optionally, in the embodiment of the present application, the box body 1 is provided with an openable and flippable cover or door to facilitate installation and maintenance inside the box body.

[0026] The air duct 2 is arranged vertically at the air outlet of the air conditioner 13, and the two are effectively connected in a reasonable manner, achieving a dehumidification effect. The remaining side surfaces and bottom surfaces of the air duct 2 can be welded or spliced ​​together. The air duct 2 has the same dimensions as the air outlet of the air conditioner 13 in the left-right direction and is larger in the front-to-back direction than the air outlet, and meets certain conditions.

[0027] The air conditioner 13 is an integrated top-mounted air conditioner 13. The air outlet and the air return outlet of the air conditioner 13 are appropriately spaced and connected to the interior space of the box body through corresponding openings on the box body 1.

[0028] It should be noted that the air conditioner 13 absorbs the hot air flow in the small energy storage system at the return air inlet, cools the hot air flow and outputs the cold air flow to the system through the air outlet, thereby achieving heat dissipation and refrigeration of the small energy storage system. Figure 2 The air inlet of the air conditioner 13 in the front and rear directions is close to the inner side of the rear wall of the box body 1, and reasonably provides sufficient conditions for the size of the air duct 2 and facilitates the installation of the air duct 2.

[0029] The battery clusters 6 may include multiple battery packs mounted on a battery rack and comprised of the battery rack itself. The main structure of the battery rack is a column-type structure, with support members spaced apart in height to arrange the battery packs in layers. The remaining space within the battery rack is typically occupied by essential components of the energy storage system, such as a high-voltage box, UPS power supply, fuses, and power transformer.

[0030] In a specific implementation, the battery cluster 6 is disposed inside the housing 1, with a first air cavity 3 defined within the battery cluster 6. The first air cavity 3 is located internally. A second air cavity 7 is disposed between the inner wall of the housing 1 and the battery cluster 6, wherein the air outlet of the air conditioner 13 is connected to the air inlet of the air duct 2.

[0031] Furthermore, the air duct 2 guides the air intake in the box 1, and passes through the first air cavity 3 and the air duct 2, so that the air-conditioned cold air in the air conditioner 13 is evenly supplied to each battery pack 602 on the battery cluster 6 for heat dissipation, and the battery cluster 6 is exhausted and convected through the second air cavity 7. The first air cavity 3 is connected to the air outlet of the air duct 2, and the second air cavity 7 is located on both sides of the inside of the box 1.

[0032] The heat dissipation airflow circulation of the small energy storage system is carried out by adopting the middle air duct 2 and the first air cavity 3 to take in, divide and guide the air, and the second air cavity 7 on both sides of the box body 1 to extract and convect the air.

[0033] It should be noted that in order to ensure better implementation of the above functions, the first air cavity 3 needs to be connected to the air outlet of the air duct 2, and the second air cavity 7 is located on the left and right sides of the inside of the box 1 to increase the effect of exhaust convection.

[0034] In one embodiment of the present application, a vertical guide plate 5 and / or a horizontal diverter plate 4 are provided in the first air cavity 3, the battery clusters 6 are arranged on the left and right sides of the box body 1, and the first air cavity 3 is opened between the battery clusters 6 on the left and right sides.

[0035] In specific implementation, a vertical guide plate is provided in the first air cavity 3, and a horizontal diverter plate 4 can also be provided to increase the internal air inlet diversion. The battery cluster 6 is arranged on the left and right sides of the box body 1. Correspondingly, Figure 1 As shown, the first air cavity 3 is opened between the battery clusters 6 on the left and right sides.

[0036] Preferably, if Figure 4 and 5 As shown, the first air cavity 3 is arranged in the space between the two battery clusters. The rear side of the first air cavity 3 is the same as the front side of the air duct. Flat plates are installed on the remaining side surfaces and bottom surfaces, connected by welding and splicing. The height and length of the first air cavity 3 are the same as the distance from the front end to the rightmost end and from the top to the bottom of the entire battery cluster 6 on one side.

[0037] In one embodiment of the present application, Figure 1 As shown, the battery cluster 6 includes a plurality of battery clusters 6 , each of which includes a battery bracket 601 , on which a plurality of battery packs 602 are mounted for arranging the battery packs in layers.

[0038] like Figure 1 As shown in FIG2 , the battery clusters on both sides are arranged symmetrically and each side has three columns of battery clusters 6. Each column of battery clusters 6 is mainly composed of a battery bracket 601 and a certain number of battery packs 602.

[0039] In some embodiments, the battery rack body is a column-type frame consisting of four columns and connecting crossbeams, with the length and width matching the length and width of the battery pack 602. Support plates are provided on both sides of the columns at equal intervals in the height direction to arrange multiple battery packs 602 in layers, with the spacing in this direction matching the height of the battery pack 602.

[0040] In one embodiment of the present application, Figure 4 As shown, the horizontal diversion plates 4 include multiple ones, which are respectively arranged in the vertical direction of the multiple battery packs 602, and each of the horizontal diversion plates 4 is aligned with the bottom of the opening at the corresponding position of the air duct 2; the vertical guide plates 5 include multiple ones, which are respectively arranged within a preset range from the battery cluster 6, and each group of the vertical guide plates 5 is arranged on the left and right sides relative to the first air cavity 3.

[0041] In specific implementation, horizontal diverter plates 4 with gradually varying lengths are arranged in the vertical direction of the first air cavity 3 according to the positions of the battery packs 602 in each row, and each horizontal diverter plate 4 is flush with the bottom of the opening at the corresponding position of the air duct 2 .

[0042] Furthermore, the horizontal diverter plate 4 includes multiple ones, which are respectively arranged in the vertical direction of the multiple battery packs 602, and each of the horizontal diverter plates 4 is aligned with the bottom of the opening at the corresponding position of the air duct 2, that is, each of the horizontal diverter plates 4 is flush with the bottom of the opening at the corresponding position of the air duct 2, the front end of the horizontal diverter plate 4 is flush with the front end of the first air cavity 3, and the local area of ​​the rear end is located in the air duct 2.

[0043] It can be understood that the end of the air duct 2 is located below the bottom of the battery cluster 6. This is because the vertical air duct 2 allows the air conditioning condensation water to gather at the bottom of the air duct under the action of gravity. The bottom of the air duct 2 located at a lower position can effectively prevent the condensation water from having a serious impact on the battery cells in the battery cluster. The relevant dimensions in the embodiment meet this condition.

[0044] Furthermore, in the front-to-back direction, the layout of air duct 2 ensures that its rear side is flush with the rear side of the air conditioner outlet, while its front side is flush with the rear end of battery cluster 6. This allows the excess portion of air duct 2 relative to the air conditioner outlet 13 to be located at the front end of duct 2. Because the air conditioning cools down at a high speed, the extra space at the front end of duct 2 mitigates the effects of strong vertical convection. It also facilitates the cool air's gentle forward diffusion, ensuring a stable flow from each opening into the first air cavity.

[0045] In one embodiment of the present application, Figure 4 As shown, the air duct 2 includes a vertical structure, the top of the air duct 2 serves as the air inlet 201 of the air duct, the bottom of the air duct 2 is located below the bottom of the battery cluster 6, and the front side of the air duct 2 is provided with openings with gradually changing areas at corresponding distribution positions in the vertical direction of each battery pack 602 in the battery cluster 6 to serve as the air outlet 202 of the air duct.

[0046] In practice, the air duct 2 comprises a vertical structure, extending vertically from top to bottom. The top of the duct 2 serves as the air inlet 201. The bottom of the duct 2 is located below the bottom of the battery cluster 6, with a cross-sectional dimension slightly larger than the air conditioning outlet. The front side of the duct features gradually varying openings at corresponding locations vertically aligned with each battery pack 602 in the battery cluster, serving as the air outlet 202.

[0047] In one embodiment of the present application, a second air cavity 7 is further provided on the outside of the battery cluster 6, and the height of the second air cavity 7 is higher than the height of the battery cluster 6. A plurality of fans 14 are provided on the top of the second air cavity 7. The outlet of each battery pack 602 in the battery cluster 6 is the air inlet of the second air cavity 7. The air flow enters the second air cavity 7 from this air inlet and leaves under the action of the fan 14.

[0048] In practice, the second air cavity 7, located outside the battery cluster, is taller than the battery cluster itself, ensuring adequate installation for the fans 14. The second air cavity 7 is completely enclosed by a baffle 701. At the top of the cavity, fans 14 are evenly spaced and arranged above the battery cluster 6. The outlets of each battery pack 602 in the battery cluster 6 serve as the air inlet for the second air cavity 7. Air enters the second air cavity 7 and exits under the influence of the fans.

[0049] Preferably, a second air cavity 7 is installed on the outside of the battery cluster 6. Its length is the same as the overall length of the three rows of battery clusters 6, its thickness is the distance from the outer side of the battery cluster 6 to the inner wall of the box 1, and its height is the distance from the bottom of the battery cluster 6 to the ceiling inside the box 1. That is, the second air cavity 7 is composed of the space enclosed by the air cavity partition 701 on the outside of the battery cluster 6 and the inner wall of the box 1, and each surface can be processed and combined by welding or splicing. The front and rear ends of the air cavity partition 701 are respectively in contact with the front and rear ends of the inner wall of the box 1, and the upper and lower ends are respectively in contact with the ceiling inside the box 1 and the top of the outer side of the battery cluster 6. A series of equally spaced openings are provided in the middle, and a number of fans (axial fans) 14 are arranged on the openings. The second air cavity 7 is used to complete the hot air return after the heat dissipation of the battery pack 602, and has a certain promoting effect on the overall air circulation in the system.

[0050] In one embodiment of the present application, Figure 5As shown, the horizontal diverter plate 4 at least includes: a fixed long plate 401 and a sliding short plate 402. The length of the fixed long plate 401 is the same as the length of the first air cavity 3. The front end and the rear end of the fixed long plate 401 are respectively connected to the front side and the rear side of the first air cavity 3. The sliding short plate 402 is arranged behind the fixed long plate 401, and the bottom surface is against the top surface of the fixed long plate 401. The left and right sides of the rear end of the sliding short plate 402 are provided with raised portions, and correspondingly, the air duct 2 is provided with a groove portion at the corresponding position of the sliding short plate 402.

[0051] In specific implementation, the horizontal diverter plate is formed by a fixed long plate 401 and a sliding short plate 402, wherein the length of the fixed long plate 401 is the same as that of the first air cavity 3, and the front end face and the rear end face of the fixed long plate 401 are fastened to the front side face and the rear side face of the first air cavity 3 respectively.

[0052] The sliding short plate 402 is positioned at the rear end of the fixed long plate 401, with its bottom surface in contact with the top surface of the fixed long plate 401. Its front half rests on the fixed long plate 401, while its rear half lies within the air duct 2. The left and right sides of the rear end of the sliding short plate 402 are machined with extensions, while the air duct 2 has slots at corresponding locations on the sliding short plate 402. This allows the sliding short plate 402 to slide forward and backward within the air duct 2. Based on the air volume of each row as shown by fluid simulation and actual engineering, horizontal diverter plates 4 with varying lengths can be configured to evenly distribute the air volume in the vertical direction.

[0053] Furthermore, in the front-to-back direction, the air cavity is equipped with vertical baffles 5 at the battery cluster closest to the air duct, based on a method for optimizing the uniform airflow for each column of battery clusters 6 obtained through fluid simulation. From back to front, a 210mm-wide baffle is first placed centrally at the quarter position of the first battery cluster; second, 25mm-wide baffles are placed on both sides of the middle position of the first battery cluster; and finally, a 120mm-wide baffle is placed centrally at the middle position of the second battery cluster. This is because when cold air enters the first air cavity 3 from the outlet of air duct 2, convection in the front-to-back direction is significant, but diffusion in the left-to-right direction is poor. Therefore, vertical baffles 5, symmetrically arranged on both ends or centered near air duct 2, are required. These baffles are perpendicular to the incoming airflow, effectively forming a bypass flow to reduce the front-to-back convection effect and enhance fluid diffusion in the left-to-right direction. This, in turn, increases the airflow of the battery clusters 6 near air duct 2, achieving uniform airflow in the front-to-back direction.

[0054] In one embodiment of the present application, a plurality of power storage converter (PCS) modules 12 are arranged at the bottom of the container, below the battery cluster 6 , wherein each of the power storage converter (PCS) modules has a plurality of cooling fans built in.

[0055] When implementing it specifically, Figure 3 and 4 As shown, several power storage converter (PCS) modules 12 are arranged at the bottom of the container, evenly distributed in the space below the battery cluster modules. The PCS modules are equipped with fans that draw air to dissipate heat from electronic components such as the IGBTs within the modules. The modules' air inlets and outlets meet dust and water resistance requirements.

[0056] In one embodiment of the present application, the inner wall and the outer wall of the box body 1 adopt a sheet metal structure, and the space between the inner wall and the outer wall is filled with insulation material to form an insulation layer.

[0057] In a specific implementation, the box body is composed of two layers of sheet metal and one layer of thermal insulation filler, wherein the two layers of sheet metal are the inner wall and the outer wall of the box body respectively, and the thermal insulation filler fills the space between the inner wall and the outer wall.

[0058] It should be noted that, under the condition that the material cost and thermal insulation performance can meet the requirements, the material and thickness of the two layers of sheet metal and thermal insulation filler can be determined according to actual needs, and are not specifically limited in this application.

[0059] In one embodiment of the present application, the air conditioner 13 is an integrated air conditioner, wherein the cooling power of the air conditioner 13 is not less than the sum of the heating power of all battery packs in the energy storage system.

[0060] In practice, the air conditioner 13 is an integrated unit with an appropriate spacing between the air outlet and return air vent. The air conditioner's cooling power is no less than the sum of the heating power of all battery packs within the energy storage system. The housing is provided with openings of corresponding sizes at the corresponding locations of the air outlet and return air vent.

[0061] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A small energy storage system container, wherein: The container comprises: a box body (1), an air duct (2), an air conditioner (13), and a battery cluster (6); the battery cluster (6) is arranged inside the box body (1); a first air cavity (3) is provided in the middle of the battery cluster (6); a second air cavity (7) is provided between the left and right inner walls of the box body (1) and the battery cluster (6); an air outlet of the air conditioner (13) is connected to an air inlet of the air duct (2); in, The air duct (2) guides the air intake in the box (1), passes through the first air cavity (3) and the air duct (2), so that the air conditioning cold air in the air conditioner (13) is evenly supplied to each battery pack (602) on the battery cluster (6) for heat dissipation, and the battery cluster (6) is exhausted and convected through the second air cavity (7). The first air cavity (3) is connected to the air outlet of the air duct (2), and the second air cavity (7) is located on both sides of the interior of the box (1); A vertical guide plate (5) and a horizontal diverter plate (4) are provided in the first air cavity (3), and the horizontal diverter plates (4) include a plurality of plates, which are respectively provided in the vertical direction of the plurality of battery packs (602), and each of the horizontal diverter plates (4) is aligned with the bottom of the opening at the corresponding position of the air duct (2); The vertical guide plates (5) include a plurality of plates, each of which is arranged within a preset range from the battery cluster (6), and each group of the vertical guide plates (5) is arranged on the left and right sides relative to the first air cavity (3); The horizontal diverter plate (4) at least comprises: a fixed long plate (401) and a sliding short plate (402), the length of the fixed long plate (401) being the same as the length of the first air cavity (3), the front end and the rear end of the fixed long plate (401) being connected to the front side and the rear side of the first air cavity (3) respectively, the sliding short plate (402) being arranged behind the fixed long plate (401), and the bottom surface thereof being against the top surface of the fixed long plate (401), the left and right sides of the rear end of the sliding short plate (402) being provided with raised portions, and correspondingly, the air duct (2) is provided with a groove portion at a corresponding position of the sliding short plate (402).

2. The container according to claim 1, wherein: The air duct (2) comprises a vertical structure, the top of the air duct (2) serves as an air inlet (201) of the air duct, the bottom of the air duct (2) is located below the bottom of the battery cluster (6), and the front side of the air duct (2) is provided with openings with gradually varying areas at corresponding distribution positions in the vertical direction of each battery pack (602) in the battery cluster (6) to serve as an air outlet (202) of the air duct.

3. The container according to claim 1, wherein: The battery clusters (6) are arranged on the left and right sides of the box body (1), and the first air cavity (3) is opened between the battery clusters (6) on the left and right sides.

4. The container according to claim 3, wherein: The battery clusters (6) include a plurality of battery clusters (6), each of which includes a battery bracket (601), and a plurality of battery packs (602) are mounted on the battery bracket (601) for arranging the battery packs in layers.

5. The container according to claim 1, wherein: A second air cavity (7) is provided on the outside of the battery cluster (6), and the height of the second air cavity (7) is higher than the height of the battery cluster (6). A plurality of fans (14) are provided on the top of the second air cavity (7), and the outlet of each battery pack (602) in the battery cluster (6) is the air inlet of the second air cavity (7). Airflow enters the second air cavity (7) through the air inlet and leaves under the action of the fans (14).

6. The container according to any one of claims 1 to 5, wherein: A plurality of power storage converter (PCS) modules (12) are arranged at the bottom of the container and are located below the battery cluster (6), wherein each of the power storage converter (PCS) modules has a plurality of cooling fans built in.

7. The container according to any one of claims 1 to 5, wherein: The inner wall and outer wall of the box body (1) adopt a sheet metal structure, and the space between the inner wall and the outer wall is filled with thermal insulation material to form a thermal insulation layer.

8. The container according to any one of claims 1 to 5, wherein: The air conditioner (13) is an integrated air conditioner, wherein the cooling power of the air conditioner (13) is not less than the sum of the heating powers of all battery packs in the energy storage system.

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