High-voltage box used in energy storage system

Abstract

The utility model discloses a high-voltage box used in an energy storage system, which comprises a box body and an upper cover, the box body is a frame-shaped structure with an opening at one end, the upper cover is connected with the opening end of the box body, an installation cavity is arranged in the box body, an electrical assembly and an electrical device installation plate are arranged in the installation cavity, and the electrical assembly is connected with the electrical device installation plate; the electrical component comprises a heating device, a heat dissipation fan is arranged on the electrical component mounting plate, the heat dissipation fan is arranged under the heating device, and the heat dissipation fan can blow air towards the direction of the heating device towards the upper cover; an air cavity is formed in the electric device mounting plate, an air outlet hole is formed in the position, corresponding to the cooling fan, of the electric device mounting plate, the air outlet hole is communicated with the air cavity, first air return holes are formed in the peripheral side walls of the electric device mounting plate, and the first air return holes are communicated with the air cavity. According to the utility model, the temperature equalization effect of the internal space of the box body is utilized to radiate the heat of the heating device, so that the influence on the work of other devices can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage systems, in particular to a high-voltage box used in an energy storage system. Background Art

[0002] Currently, battery energy storage systems require high-voltage boxes. Many electrical components are integrated inside the high-voltage box, which generates heat when in operation. In order to better protect the electrical components inside the high-voltage box from the harsh external environment, the high-voltage box shell is designed with a high level of protection to achieve dust-tightness or water-tightness, generally designed with different protection levels from IP54 to IP67. This creates a problem, that is, the heat generated by the electrical components inside the high-voltage box cannot be exchanged with the outside air to dissipate heat, causing the temperature of the heating components inside the box to continue to rise. The general solution is to install a fan in the box to turbulently distribute the heat generated by the high-temperature components evenly to every corner of the box, and use the internal space to balance the high temperature generated by the components to achieve cooling of the high-temperature components.

[0003] Currently, fans are generally installed vertically inside existing high-voltage boxes, blowing air towards the components that need to be cooled. This solution will directly blow the high temperature generated by the components to nearby components, causing the temperature of surrounding electrical components to rise, seriously affecting the normal operation of surrounding components, and in severe cases, may cause fires and property losses. Utility Model Content

[0004] In order to solve some or all of the problems existing in the above-mentioned prior art, the utility model provides a high-voltage box for an energy storage system, comprising a box body and an upper cover, the box body being a frame-shaped structure with an open end, the upper cover being connected to the open end of the box body, an installation cavity being provided in the box body, an electrical component and an electrical component mounting plate being provided in the mounting cavity, the electrical component being connected to the electrical component mounting plate; the electrical component comprising a heating device, the heating device being connected to the electrical component mounting plate, a cooling fan being provided on the electrical component mounting plate, the cooling fan being arranged directly below the heating device, and the cooling fan being capable of blowing air toward the heating device toward the upper cover; an air cavity being provided in the electrical component mounting plate, an air outlet being provided at a position corresponding to the cooling fan on the electrical component mounting plate, the air outlet being connected to the air cavity, and first return air holes being provided on the four side walls of the electrical component mounting plate, the first return air holes being respectively connected to the air cavity.

[0005] As a further improvement of the present invention, a second air return hole is provided on a side of the electrical component mounting plate away from the air outlet hole, and the second air return hole is communicated with the air cavity.

[0006] As a further improvement of the present invention, a support column is provided on the electrical component mounting plate, the heating component is connected to the support column, and a first gap is reserved between the heating component and the cooling fan.

[0007] As a further improvement of the present invention, the support column is made of insulating material.

[0008] As a further improvement of the present invention, a second gap is reserved between the upper end surface of the heating element and the lower end surface of the upper cover.

[0009] As a further improvement of the present invention, the electrical component mounting plate includes a mounting end face, and right-angled bend edges are respectively provided on all four sides of the mounting end face. The first return air hole is arranged on the side of the right-angled bend edge, and the right-angled bend edge is sealed and abutted against the inner wall of the box body. The air cavity is an enclosed cavity formed by the right-angled bend edge and the inner wall of the box body.

[0010] As a further improvement of the present invention, the heating device is a fuse, and a plurality of relays and circuit breakers are further provided in the box, and the relays and fuses are electrically connected to the circuit breakers respectively.

[0011] As a further improvement of the present invention, a sealing ring is provided at the open end of the box body, and the upper cover is in sealing contact with the sealing ring.

[0012] As a further improvement of the present invention, a handle is provided on the outer end surface of the box body.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the present invention, the cooling fan is installed directly below the heating device, and the cooling fan adopts a flat installation method, which can dissipate heat from the heating device; when the cooling fan is working, it blows away the heat generated by the heating device and blows the hot air toward the upper cover, thereby reducing the impact on the operation of other devices and improving the service life.

[0015] 2. The utility model realizes a circulation of air inside the box through the design of the air cavity and the first return air hole, thereby utilizing the temperature balancing effect of the internal space of the box to reduce the temperature of the heating device, so that the temperature of the heating device is controlled within a reasonable range, and the temperature inside the box can be controlled within the normal operating temperature range of all devices, thereby improving the safety and stability of the electrical components, and also ensuring that the electrical components have a maximum service life, avoiding safety risks such as fire and explosion caused by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the scheme of the utility model or the prior art, the following will be a brief introduction to the drawings needed to be used in the embodiment or the prior art description, obviously, the following description of the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0017] Figure 1 It is the external structure schematic diagram of the embodiment of the utility model;

[0018] Figure 2 It is the overhead structure schematic diagram of the embodiment of the utility model;

[0019] Figure 3 It is Figure 2 A-A section structure schematic diagram in the embodiment of the utility model;

[0020] Figure 4 It is the internal structure schematic diagram of the box body in the embodiment of the utility model;

[0021] Figure 5 It is the structure schematic diagram of the electric device mounting plate in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] Unless otherwise defined, all technical and scientific terms used in the utility model have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model; The specification and claims of the utility model and the above-mentioned drawing description of the terms "include" and "have" and their any modification, it is intended to cover the non-exclusive inclusion. The specification and claims of the utility model or the above-mentioned terms "first", "second" etc. in the drawing are used to distinguish different objects, not to describe a specific order.

[0023] In the utility model, "embodiment" is mentioned, which means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the utility model. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the utility model can be combined with other embodiments.

[0024] In order to make those skilled in the art better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be described clearly and completely in conjunction with the drawings.

[0025] As Figure 1-5As shown, a high-voltage box for an energy storage system includes a box body 1 and an upper cover 2. The box body 1 is a frame-like structure with one end open. The upper cover 2 is sealed and connected to the open end of the box body 1. An installation cavity 11 is provided in the box body 1. An electrical component 3 and an electrical component mounting plate 4 are provided in the installation cavity 11. The electrical component 3 is connected to the electrical component mounting plate 4. The box body 1 is set as an open frame-like structure to facilitate the installation of the electrical component mounting plate 4 and the electrical component 3 into the installation cavity 11. By providing the electrical component mounting plate 4, the electrical component 3 is easily installed and fixed in the box body 1.

[0026] The electrical component 3 includes a heating device 31 and other devices arranged on the side of the heating device 31. The heating device 31 and the other devices are respectively connected to the electrical device mounting plate 4. The electrical device mounting plate 4 is provided with a cooling fan 5. The cooling fan 5 is arranged directly below the heating device 31, and the cooling fan 5 can blow air toward the heating device 31 in the direction of the upper cover 2. When the high-voltage box is working, the heating device 31 will generate heat. The cooling fan 5 will blow cold air toward the heating device 31 to generate heat exchange with the heating device 31, thereby taking away the heat. After that, the hot air will be blown in the direction of the upper cover 2, thereby achieving the purpose of cooling the heating device 31. The high-voltage box arranges the cooling fan 5 directly below the heating device 31, so that the heating fan will not blow hot air toward other devices when working, reducing the impact on the operation of other devices, thereby improving its working stability.

[0027] An air cavity 41 is provided within the electrical component mounting plate 4. Air outlet holes 42 are provided at positions on the electrical component mounting plate 4 corresponding to the cooling fan 5. The air outlet holes 42 are connected to the air cavity 41. First return air holes 43 are provided on all four side walls of the electrical component mounting plate 4. The first return air holes 43 are respectively connected to the air cavity 41. When the cooling fan 5 is operating, the air within the housing 1 enters the air cavity 41 through the first return air holes 43, then flows through the air cavity 41 into the air outlet holes 42, and then flows into the cooling fan 5. The cooling fan 5 then blows the air toward the heating device 31, exchanging heat with the heating device 31 to dissipate heat. After the heat exchange, the hot air will flow into the housing 1 toward the upper cover 2, thereby forming a circulating airflow. The high-voltage box makes full use of the temperature balancing effect of the internal space of the box body 1 to reduce the temperature of the heating device 31, so that the temperature of the heating device 31 is controlled within a reasonable range. The temperature inside the box body 1 can be controlled within the normal operating temperature range of all devices, thereby improving the safety and stability of the operation of the electrical component 3, and also ensuring that the electrical component 3 has a maximum service life, avoiding safety risks such as fire and explosion caused by high temperature.

[0028] A second return air hole 44 is provided on the side of the electrical component mounting plate 4 away from the air outlet 42, and the second return air hole 44 is connected to the air cavity 41; when the cooling fan 5 is working, the air in the mounting cavity 11 will flow into the air cavity 41 through the first return air hole 42 and the second return air hole 44 respectively. By setting the second return air hole 44, the gas flow in the box body 1 can be improved; the high-pressure box sets the first return air hole 43 on the side walls around the electrical component mounting plate 4, and sets the second return air hole 44 on one side of the air outlet 42 in the yard, thereby driving the gas flow in the entire space inside the box body 1 to the greatest extent, so that the temperature in the entire box body 1 can be balanced and reach a uniform temperature, so as to achieve the purpose of cooling the heating device 31.

[0029] The electrical component mounting plate 4 includes a mounting end surface 45 for mounting the electrical components 3. The mounting end surface 45 is surrounded by right-angled edges 46. The first air return vents 43 are located on the sides of the right-angled edges 46. The electrical component mounting plate 4 is fixedly connected to the housing 1 via screws, so that the four right-angled edges 46 are in sealed contact with the lower surface of the inner wall of the housing 1.

[0030] In this embodiment, the air cavity 41 is a cavity formed by the inner wall of the four right-angled bent edges 46 and the lower surface of the inner wall of the box body 1; in other embodiments, the electrical component mounting plate 4 can also be a hollow structure containing a cavity inside, and the cavity inside is the air cavity 41.

[0031] In this embodiment, the electrical component mounting plate 4 is made of a rectangular plate, and its four side edges are bent to form four right-angled edges 46; in other embodiments, the right-angled edges 46 and the mounting end surface 45 can also be two independent components fixed together by screws.

[0032] A support column 6 is provided on the electrical component mounting plate 4, and the heating component 31 is fixedly installed on the support column 6, so that a first gap 7 can be reserved between the heating component 31 and the cooling fan 5; by reserving the first gap 7, the cooling fan 5 can blow air to the entire heating component 31, thereby achieving the purpose of uniform heat dissipation for the heating component 31 and improving the stability of the operation.

[0033] The support column 6 is made of insulating material to avoid short circuit or conduction due to temperature rise, thereby improving work safety. The support column 6 can be made of insulating materials such as ceramics and rubber.

[0034] A second gap 8 is reserved between the upper end surface of the heating element 31 and the lower end surface of the upper cover 2. By setting the second gap 8, the cooling fan 5 can fully stir the air in the box 1, so that the air in the box 1 can flow fully, thereby adjusting the temperature in the entire box 1 to a balanced temperature and improving the stability of the high-voltage box operation.

[0035] In this embodiment, the heating element 31 is a fuse. The housing 1 is further provided with a plurality of relays 32 and circuit breakers 33, each of which is electrically connected to the circuit breaker 33. The present invention does not limit the specific circuit structure of the electrical component 3. Furthermore, in other embodiments, the heating element 31 may be another electrical device that generates heat during operation.

[0036] In order to improve the overall sealing of the high-voltage box, a sealing ring 9 is installed on the end face of the open end of the box body 1, and the upper cover 2 is installed on the open end of the box body 1 by screws. When the upper cover 2 is installed and fixed, the upper cover 2 and the sealing ring 9 are sealed and abutted; the sealing ring 9 prevents water vapor, dust, etc. from entering the box body 1 through the fitting gap between the box body 1 and the upper cover 2, thereby improving the working stability of the high-voltage box.

[0037] In order to facilitate carrying and installation of the high-voltage box, a handle 10 is installed on the outer end surface of the box body 1; when the high-voltage box needs to be transported and installed, the user can hold the handle 10 to operate, which improves practicality.

[0038] The above-mentioned specific implementation manner is a preferred implementation manner of the present utility model, and is not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation manner. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. A high-voltage box for an energy storage system, characterized in that: The device comprises a box body and an upper cover, wherein the box body is a frame-shaped structure with one end open, the upper cover is connected to the open end of the box body, a mounting cavity is provided in the box body, an electrical component and an electrical component mounting plate are provided in the mounting cavity, and the electrical component is connected to the electrical component mounting plate; The electrical component includes a heating element, the heating element is connected to the electrical element mounting plate, a cooling fan is provided on the electrical element mounting plate, the cooling fan is arranged directly below the heating element, and the cooling fan can blow air toward the heating element toward the upper cover; An air cavity is provided in the electrical component mounting plate, and an air outlet is provided at a position on the electrical component mounting plate corresponding to the cooling fan, and the air outlet is connected to the air cavity. First return air holes are provided on the four side walls of the electrical component mounting plate, and the first return air holes are respectively connected to the air cavity.

2. The high-voltage box for an energy storage system according to claim 1, characterized in that: A second air return hole is provided on a side of the electrical component mounting plate away from the air outlet hole, and the second air return hole is communicated with the air cavity.

3. The high-voltage box for an energy storage system according to claim 2, characterized in that: The electrical component mounting plate is provided with a support column, the heating component is connected to the support column, and a first gap is reserved between the heating component and the cooling fan.

4. The high-voltage box for an energy storage system according to claim 3, characterized in that: The supporting column is made of insulating material.

5. The high-voltage box for an energy storage system according to claim 2, characterized in that: A second gap is reserved between the upper end surface of the heating element and the lower end surface of the upper cover.

6. The high-voltage box for an energy storage system according to any one of claims 2 to 5, characterized in that: The electrical component mounting plate includes a mounting end face, and right-angled bend edges are respectively provided on all four sides of the mounting end face. The first return air hole is arranged on the side of the right-angled bend edge, and the right-angled bend edge is sealed against the inner wall of the box body. The air cavity is an enclosed cavity formed by the right-angled bend edge and the inner wall of the box body.

7. The high-voltage box for an energy storage system according to claim 6, characterized in that: The heating device is a fuse, and a plurality of relays and circuit breakers are further provided in the box, and the relays and fuses are electrically connected to the circuit breakers respectively.

8. The high-voltage box for an energy storage system according to claim 6, characterized in that: A sealing ring is provided at the open end of the box body, and the upper cover is in sealing contact with the sealing ring.

9. The high-voltage box for an energy storage system according to claim 6, characterized in that: A handle is provided on the outer end surface of the box body.

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