Energy storage device

Abstract

The utility model discloses energy storage equipment, and relates to the technical field of energy storage devices. The energy storage equipment comprises a box body, and a functional part, a U-shaped heat conduction part and an air cooling part which are fixed in the box body, the U-shaped heat conduction piece comprises a bottom plate and two side plates vertically arranged on the two sides of the bottom plate. The functional part is mounted on the inner side of the U-shaped heat conduction piece and is in thermal contact with a bottom plate and / or a side plate of the U-shaped heat conduction piece; the air cooling part is located between the side plate and the box wall of the box body and used for cooling the U-shaped heat conduction piece. The energy storage equipment disclosed by the utility model is low in manufacturing cost and relatively small in thickness size of the whole machine.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly to an energy storage device. Background Art

[0002] The power conversion system (PCS) is a key device in the energy storage system, which is used to realize the energy conversion and bidirectional flow between the energy storage battery and the power grid. A large amount of heat is generated during the operation of the PCS. If this heat cannot be dissipated in time, it will cause the device temperature to be too high, affecting its stability and safety.

[0003] In the related art, the PCS mainly includes two types: air-cooled PCS and liquid-cooled PCS. Among them, the air-cooled PCS generally adopts an up-and-down structure design, that is, the PCS functional components and the air-cooling components are arranged in the upper and lower layers inside the box. However, this also leads to a large thickness of the PCS box; in the liquid-cooled PCS, the liquid-cooling plate is generally arranged below the PCS functional components. Although this method can achieve an ultra-thin design of the box, the manufacturing cost is high. Therefore, the above two types of PCS each have their drawbacks. Summary of the Utility Model

[0004] In view of this, this application provides an energy storage device with low manufacturing cost and a small overall thickness dimension.

[0005] This application specifically adopts the following technical solutions:

[0006] An energy storage device, the energy storage device includes a box body, and functional components, a U-shaped heat conducting member and an air-cooling component fixed inside the box body;

[0007] The U-shaped heat conducting member includes a bottom plate, and two side plates erected on both sides of the bottom plate;

[0008] The functional components are installed inside the U-shaped heat conducting member and are in thermal contact with the bottom plate and / or the side plates of the U-shaped heat conducting member;

[0009] The air-cooling component is located between the side plate and the box wall of the box body and is used to cool the U-shaped heat conducting member.

[0010] Optionally, a plurality of heat dissipation fins are provided on the surface of at least one side plate facing away from the other side plate.

[0011] Optionally, the U-shaped heat conducting member further includes a plurality of heat pipes, and the plurality of heat pipes are installed on the bottom plate and exposed on the surface of the bottom plate facing the functional components.

[0012] Optionally, the functional components are in thermal contact with the part of at least one heat pipe exposed on the bottom plate.

[0013] Optionally, the portion of each of the heat pipes exposed from the bottom plate extends in a first direction, where the first direction is parallel to the arrangement direction of the two side plates.

[0014] Optionally, the multiple heat pipes are arranged in pairs, and at least one pair of the heat pipes is configured such that the two heat pipes are opposite to each other in the first direction, and the ends of the two heat pipes close to each other are spaced apart.

[0015] Optionally, the air-cooling component includes at least one first fan, and each first fan is located between one side plate of the U-shaped heat conducting member and the box wall of the box body.

[0016] Optionally, the installation position of the first fan corresponds to the middle part of the side plate.

[0017] Optionally, the air-cooling component includes at least one pair of second fans. Each pair of second fans is located between one side plate of the U-shaped heat conducting member and the box wall of the box body, and the two second fans in each pair of second fans are respectively arranged close to the opposite sides of the side plate in a second direction, where the second direction is perpendicular to the arrangement direction of the two side plates and parallel to the plate surface of the bottom plate.

[0018] Optionally, in the pair of second fans, one second fan is configured to blow air towards the other second fan, and the other second fan is configured to extract air.

[0019] The energy storage device provided by the embodiment of the present application realizes the heat dissipation of the functional components through the U-shaped heat conducting member and the air-cooling component. Among them, the functional components are installed inside the U-shaped heat conducting member and are in thermal contact with the U-shaped heat conducting member. Therefore, the heat generated by the functional components during operation will be transferred to the U-shaped heat conducting member for dissipation; the air-cooling component is arranged on the side of the U-shaped heat conducting member and can blow air on the side plates of the U-shaped heat conducting member, thereby accelerating the heat dissipation speed of the U-shaped heat conducting member, and further increasing the heat dissipation speed of the functional components to meet their heat dissipation requirements. Moreover, since the air-cooling component in this energy storage device is arranged between the U-shaped heat conducting member and the box wall of the box body, that is, on the side of the functional components, the size of the whole energy storage device in the thickness direction is significantly reduced, and since the air-cooling heat dissipation method is adopted, the cost of this energy storage device is relatively low. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0021] Figure 1 It is a schematic structural diagram of an air-cooled energy storage converter in the related art;

[0022] Figure 2 It is a front view of an energy storage device provided by an embodiment of the present application;

[0023] Figure 3 It is an assembly diagram of a U-shaped heat conducting member and a functional component provided by an embodiment of the present application;

[0024] Figure 4 It is a top view of a U-shaped heat conducting member provided by an embodiment of the present application;

[0025] Figure 5 It is a schematic structural diagram of an energy storage device provided by an embodiment of the present application;

[0026] Figure 6 It is a schematic structural diagram of another energy storage device provided by an embodiment of the present application.

[0027] Reference numerals:

[0028] 01, PCS functional component; 02, fan;

[0029] 1, box body;

[0030] 2, functional component;

[0031] 3, U-shaped heat conducting member; 31, bottom plate; 32, side plate; 33, heat dissipation fins; 34, heat pipe; 341, end;

[0032] 4, air-cooling component; 41, first fan; 42, second fan. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0034] In addition, the technical features involved in different implementation manners of the present application described below can be combined with each other as long as they do not conflict with each other.

[0035] Energy storage devices, such as power conversion systems (PCS), generate a large amount of heat during operation. If this heat cannot be dissipated in time, it will cause the device temperature to be too high, affecting its stability and safety. In related technologies, power conversion systems mainly include air-cooled power conversion systems and liquid-cooled power conversion systems.

[0036] Figure 1 Fig. 4 shows the structure of a common air-cooled power conversion system in related technologies. Figure 1 The dashed lines in Fig. 4 are used to indicate that the corresponding components are located inside the power conversion system. As Figure 1 shown in Fig. 5, PCS functional components 01 and fans 02 are provided on the upper and lower layers inside the power conversion system. The air-cooled power conversion system with the above structure generally has a relatively thick overall thickness and requires a large amount of space, which is not convenient for layout.

[0037] The liquid-cooled power conversion system generally uses liquid-cooled plates to cool the PCS functional components, which are generally arranged below the PCS components. Although this method can achieve an ultra-thin design of the entire power conversion system, the manufacturing cost is high.

[0038] To solve the drawbacks existing in the heat dissipation design of power conversion systems in related technologies, the embodiments of the present application provide an energy storage device. This energy storage device belongs to an air-cooled energy storage device, which has a lower manufacturing cost and a smaller overall thickness on the premise of meeting the heat dissipation requirements.

[0039] The structure of the energy storage device provided by the embodiments of the present application is as Figure 2 shown in Fig. 6. Figure 2 The dashed lines in Fig. 6 are used to indicate that the corresponding components are located inside the power conversion system. Referring to Figure 2 Fig. 7, the power conversion system includes a box body 1, and functional components 2, a U-shaped heat conduction member 3, and an air-cooling member 4 fixed inside the box body 1. Referring to Figure 3 Fig. 8, the U-shaped heat conduction member 3 includes a bottom plate 31 and two side plates 32 erected on both sides of the bottom plate 31; the functional components 2 are installed inside the U-shaped heat conduction member 3 and are in contact with the bottom plate 31 and / or the side plates 32 of the U-shaped heat conduction member 3; referring to Figure 2 Fig. 9, the air-cooling member 4 is located between the side plates 32 and the box wall of the box body 1 and is used to cool the U-shaped heat conduction member 3.

[0040] In summary, the energy storage device provided in the embodiment of the present application adopts a U-shaped heat conductive part 3 and an air-cooling part 4 to achieve heat dissipation of the functional component 2, wherein the functional component 2 is installed on the inner side of the U-shaped heat conductive part 3 and is in thermal contact with the U-shaped heat conductive part 3, so the heat generated by the functional component 2 during operation will be transferred to the U-shaped heat conductive part 3 for dissipation; the air-cooling part 4 is arranged on the side of the U-shaped heat conductive part 3, and can blow air to the side plate 32 of the U-shaped heat conductive part 3, thereby accelerating the heat dissipation speed of the U-shaped heat conductive part 3, and then improving the heat dissipation speed of the functional component 2 to meet its heat dissipation requirements. Moreover, since the air-cooling part 4 in the energy storage device is arranged between the U-shaped heat conductive part 3 and the box wall of the box body 1, that is, it is arranged on the side of the functional component 2, the size of the energy storage device in the thickness direction is significantly reduced, and since the air-cooling heat dissipation method is adopted, the cost of the energy storage device is relatively low.

[0041] In order to make the technical solutions and advantages of this application clearer, Figure 2-6 , further introduces and illustrates an energy storage device provided in an embodiment of the present application.

[0042] In the energy storage device provided in the embodiment of the present application, the functional component 2 is a core component for realizing its function. Exemplarily, the energy storage device is an energy storage converter, and the functional component 2 may include a power switch device. The power switch device generates a large amount of heat during operation, which needs to be dissipated in time, otherwise the device temperature will be too high, affecting its stability and safety.

[0043] The U-shaped heat conducting member 3 and the air cooling member 4 are arranged to meet the heat dissipation requirements of the functional member 2. Figure 3 As shown, the U-shaped heat conductive member 3 includes a bottom plate 31, and two side plates 32 standing on both sides of the bottom plate 31, so that the overall shape of the U-shaped heat conductive member 3 is U-shaped. The U-shaped heat conductive member 3 has excellent thermal conductivity. For example, the U-shaped heat conductive member 3 can be made of a material with a high thermal conductivity coefficient, and / or the U-shaped heat conductive member 3 can adopt a hollow design to facilitate heat dissipation. The functional component 2 is fixedly mounted on the inner side of the U-shaped heat conductive member 3 and is in thermal contact with the side plates 32 and / or the bottom plate 31 of the U-shaped heat conductive member 3, so that the heat generated by the functional component 2 can be promptly discharged to the U-shaped heat conductive member 3, thereby achieving the effect of cooling the functional component 2. It should be understood that the inner side of the U-shaped heat conductive member 3 refers to the side surrounded by the bottom plate 31 and the two side plates 32. Figure 3 The position (orientation) of the functional component 2 shown in FIG.

[0044] The air cooling component 4 is disposed between the side plate 32 of the U-shaped heat conducting member 3 and the wall of the box body 1. The air cooling component 4 is used to blow out airflow, thereby accelerating the heat dissipation efficiency of the U-shaped heat conducting member 3, and further improving the cooling efficiency of the functional component 2.

[0045] In some embodiments of the present application, as Figure 3 shown, a plurality of heat dissipation fins 33 are further provided on at least one side plate 32 of the U-shaped heat conducting member 3. The plurality of heat dissipation fins 33 are located on the surface of the side plate 32 facing away from the other side plate 32, that is, on the surface facing the air-cooling component 4. The heat dissipation fins 33 are made of a material with a high thermal conductivity. For example, they can be made of the same material as the U-shaped heat conducting member 3 or different materials. The heat dissipation fins 33 can increase the heat dissipation area of the U-shaped heat conducting member 3, thereby improving the heat dissipation speed and further accelerating the cooling efficiency of the functional component 2.

[0046] Optionally, a plurality of heat dissipation fins 33 are arranged at intervals and in parallel on each side plate 32, and the plurality of heat dissipation fins 33 are perpendicularly connected to the plate surface of the side plate 32 where they are located. Exemplarily, the arrangement direction of the plurality of heat dissipation fins 33 is along the length direction of the side plate 32 or along the width direction of the side plate 32.

[0047] In some embodiments of the present application, the U-shaped heat conducting member 3 further includes a plurality of heat pipes 34. The plurality of heat pipes 34 are installed on the bottom plate 31 and exposed on the plate surface of the bottom plate 31 facing the functional component 2. It should be noted that in the embodiments of the present application, the plurality of heat pipes 34 being exposed on the plate surface of the bottom plate 31 means that at least a part of the heat pipes 34 protrudes from the plate surface of the bottom plate 31, and this protruding part can either exceed the plate surface of the bottom plate 31 or be flush with the plate surface of the bottom plate 31.

[0048] The interior of the heat pipe 34 is filled with a working fluid. When one end of the heat pipe 34 is heated, the working fluid inside the pipe is heated and evaporated into steam. The steam flows to the other end of the heat pipe 34 under a small pressure difference, condenses into a liquid there and releases heat, and then the working fluid returns to the evaporation end through capillary force or gravity, thus completing a closed cycle. By providing the heat pipes 34 on the bottom plate 31 of the U-shaped heat conducting member 3, the heat of the heated area on the bottom plate 31 (i.e., the area for receiving the heat of the functional device) can be continuously conducted to the surrounding areas with relatively lower temperatures, thereby improving the heat dissipation efficiency.

[0049] In some embodiments of the present application, the functional component 2 is in thermal contact with the bottom plate 31 of the U-shaped heat conducting member 3 and is also in thermal contact with at least a part of the heat pipes 34 exposed on the bottom plate 31. Therefore, part of the heat generated by the functional component 2 can be directly transferred to the heat pipes 34, and the heat pipes 34 can conduct this heat out, thus further improving the heat dissipation efficiency of the functional component 2.

[0050] Generally speaking, the functional component 2 is installed in the middle area of the bottom plate 31. Correspondingly, the heat generated by the functional component 2 is also preferentially conducted to the middle area of the bottom plate 31. In some embodiments of the present application, as Figure 4As shown, the part of each heat pipe 34 exposed from the bottom plate 31 extends in a first direction, and the first direction is parallel to the arrangement direction of the two side plates 32. Therefore, the heat pipe 34 can conduct the heat in the middle area of the bottom plate 31 to the side plate 32 or the area near the side plate 32, thereby facilitating heat dissipation through the side plate 32, the heat dissipation fins 33, and the air-cooling component 4, and accelerating the heat dissipation efficiency.

[0051] Continue to refer to Figure 4 , a plurality of heat pipes 34 arranged on the bottom plate 31 are arranged in pairs, and at least one pair of heat pipes 34 is configured such that: the two heat pipes 34 are opposite in position in the first direction, and the ends 341 of the two heat pipes 34 close to each other are spaced apart.

[0052] As Figure 4 shown, a plurality of heat pipes 34 are distributed on both sides of the center line extending in the second direction of the bottom plate 31, where the second direction is parallel to the plate surface of the bottom plate 31 and perpendicular to the first direction. The positions of the plurality of heat pipes 34 on both sides of the center line correspond one by one, and the two corresponding heat pipes 34 are a pair, and there is a distance between the ends 341 of the two corresponding heat pipes 34 close to each other. Therefore, when the heat generated by the functional component 2 is transferred to the part of the bottom plate 31 between the two heat pipes 34, the heat will be evenly conducted by the two corresponding heat pipes 34 to the side plates 32 on both sides, thereby avoiding uneven distribution of heat and improving the heat dissipation efficiency.

[0053] In some embodiments of the present application, as Figure 5 shown, the air-cooling component 4 includes at least one first fan 41, and each first fan 41 is located between a side plate 32 of the U-shaped heat conducting member 3 and the box wall of the box body 1. Among them Figure 5 the dotted line is used to represent the arrangement position of the first fan 41 and the U-shaped heat conducting member 3 inside the energy storage device.

[0054] Exemplarily, the air-cooling component 4 includes two first fans 41, and these two first fans 41 are respectively located on both sides of the U-shaped heat conducting member 3, and are used to blow air to the two side plates 32 of the U-shaped heat conducting member 3 respectively, thereby accelerating the heat dissipation efficiency of the two side plates 32.

[0055] In some other embodiments of the present application, as Figure 6 shown, the air-cooling component 4 includes at least one pair of second fans 42, and each pair of second fans 42 is located between a side plate 32 of the U-shaped heat conducting member 3 and the box wall of the box body 1, and the two second fans 42 in each pair of second fans 42 are respectively arranged close to the opposite sides of the side plate 32 in the second direction. Among them Figure 6 the dotted line is used to represent the arrangement position of the second fan 42 and the U-shaped heat conducting member 3 inside the energy storage device.

[0056] Exemplarily, there is a gap between the two side plates 32 of the U-shaped heat conducting member 3 and the box wall facing the plate surface thereof, and this gap forms an air duct, which can allow the air flow blown by the air-cooled component 4 to pass through. Two air ducts are formed on both sides of the U-shaped heat conducting member 3 inside the box body 1, and each air duct extends along the second direction. The air-cooled component 4 includes two pairs of second fans 42, and these two pairs of second fans 42 are respectively arranged in the two air ducts for dissipating heat from the two side plates 32 respectively. Each pair of second fans 42 includes two second fans 42, and these two second fans 42 are respectively arranged near the opposite sides of the same side plate 32 in the second direction, as Figure 6 shown, so as to achieve the effect of uniform heat dissipation for the entire side plate 32.

[0057] Optionally, among the two paired second fans 42, one second fan 42 is configured to blow air to the other second fan 42, and the other second fan 42 is configured to extract air, so as to ensure the air volume in the air duct and also intensify the flow of the gas in the air duct towards one end of the air duct, thereby improving the heat dissipation efficiency.

[0058] In summary, for the energy storage device provided by the embodiment of the present application, since the U-shaped heat conducting member 3 is adopted and the air-cooled component 4 is arranged on both sides of the side plate 32 of the U-shaped heat conducting member 3, the overall thickness of the device can be significantly reduced on the basis of meeting the heat dissipation requirements. When the energy storage device is applied to an energy storage system such as an energy storage cabinet, the overall height of the energy storage system can also be reduced.

[0059] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0060] The above description is only for the convenience of those skilled in the art to understand the technical solution of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises a box (1), and a functional component (2), a U-shaped heat conducting member (3) and an air cooling component (4) fixed inside the box (1); The U-shaped heat conducting member (3) comprises a bottom plate (31) and two side plates (32) disposed upright on both sides of the bottom plate (31); The functional component (2) is mounted on the inner side of the U-shaped heat conducting member (3) and is in thermal contact with the bottom plate (31) and / or the side plate (32) of the U-shaped heat conducting member (3); The air cooling component (4) is located between the side plate (32) and the box wall of the box body (1) and is used to cool the U-shaped heat conducting component (3).

2. The energy storage device according to claim 1, characterized in that: A plurality of heat dissipation fins (33) are arranged on a plate surface of at least one of the side plates (32) facing away from the other side plate (32).

3. The energy storage device according to claim 1, characterized in that: The U-shaped heat conducting member (3) further comprises a plurality of heat pipes (34), wherein the plurality of heat pipes (34) are mounted on the bottom plate (31) and exposed on a plate surface of the bottom plate (31) facing the functional component (2).

4. The energy storage device according to claim 3, characterized in that: The functional component (2) is in thermal contact with a portion of at least one of the heat pipes (34) exposed from the bottom plate (31).

5. The energy storage device according to claim 3 or 4, characterized in that: The portion of each heat pipe (34) exposed from the bottom plate (31) extends along a first direction, wherein the first direction is parallel to the arrangement direction of the two side plates (32).

6. The energy storage device according to claim 5, characterized in that: The plurality of heat pipes (34) are arranged in pairs, and at least one pair of the heat pipes (34) is configured such that the two heat pipes (34) are positioned opposite to each other in the first direction, and the ends (341) of the two heat pipes (34) that are close to each other are spaced apart.

7. The energy storage device according to any one of claims 1 to 6, characterized in that: The air cooling component (4) comprises at least one first fan (41), and each of the first fans (41) is located between a side plate (32) of the U-shaped heat conducting member (3) and a box wall of the box body (1).

8. The energy storage device according to claim 7, characterized in that: The first fan (41) is arranged at a position corresponding to the middle portion of the side plate (32).

9. The energy storage device according to any one of claims 1 to 6, characterized in that: The air cooling component (4) comprises at least one pair of second fans (42), each pair of the second fans (42) is located between a side plate (32) of the U-shaped heat conducting component (3) and the box wall of the box body (1), and two second fans (42) in each pair of the second fans (42) are respectively arranged close to the side plates (32) on opposite sides in a second direction, wherein the second direction is perpendicular to the arrangement direction of the two side plates (32) and parallel to the plate surface of the bottom plate (31).

10. The energy storage device according to claim 9, characterized in that: In the pair of second fans (42), one of the second fans (42) is configured to blow air toward the other second fan (42), and the other second fan (42) is configured to extract air.

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