High voltage box and energy storage system

Abstract

The application provides a high-voltage box and an energy storage system, comprising: a shell comprising a plurality of side plates, which are combined to define an open end; at least one of the side plates is provided with a heat dissipation opening near the open end, the heat dissipation opening penetrates the side plate along a first direction; the first direction is the thickness direction of the side plate; a shell cover is sleeved and connected to the open end, the edge of the shell cover is formed with a first folding edge bent towards the shell, the first folding edge is arranged on the opposite outer side of the side plate along the first direction, so as to define an airflow passing gap between the first folding edge and the side plate; the orthographic projection of the first folding edge along the first direction covers the heat dissipation opening. The high-voltage box and the energy storage system provided by the application have higher safety and reliability and longer service life.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a high-voltage box and an energy storage system. Background Technology

[0002] In energy storage containers, in addition to the battery pack, a high-voltage box electrically connected to the battery pack is also required. The high-voltage box contains heat-generating devices (e.g., fuses), resulting in a high internal temperature during operation. To meet heat dissipation requirements, ventilation windows need to be installed on the outer shell of the high-voltage box.

[0003] However, the ventilation window reduces the waterproofing capability of the high-voltage box casing. If liquid enters the high-voltage box through the ventilation window, it may affect the normal operation of the high-voltage box. Utility Model Content

[0004] In view of this, the purpose of this application is to propose a high-voltage box and energy storage system to at least partially solve the problem that it is difficult to balance the heat dissipation capacity and waterproof performance of the high-voltage box, so as to improve the heat dissipation performance and waterproof performance of the high-voltage box at the same time.

[0005] To achieve the above objectives, a first aspect of this application provides a high-voltage box, comprising: a housing including a plurality of side plates, the plurality of side plates enclosing an opening end; at least one of the side plates having a heat dissipation opening near the opening end, the heat dissipation opening penetrating the side plate along a first direction; the first direction being the thickness direction of the side plate; a cover sleeved and connected to the opening end, the edge of the cover forming a first folded edge bent toward the housing, the first folded edges being spaced apart along the first direction on opposite outer sides of the side plates to define an airflow passage gap between the first folded edges and the side plates; the orthographic projection of the first folded edges along the first direction covering the heat dissipation opening.

[0006] Optionally, the side plate includes a main body, a flow guide plate, and a waterproof plate. The multiple waterproof plates of the multiple side plates define the opening end of the housing. The waterproof plates are spaced apart along the first direction on opposite inner sides of the main body and connected to the main body through the flow guide plate, forming a Z-shaped structure. The heat dissipation opening is disposed on the waterproof plate. Along the height direction of the housing, the first folded edge is spaced apart from the flow guide plate to define the outer gap section in the airflow passage gap.

[0007] Optionally, along the first direction, the first folded edge is disposed between the main body and the waterproof plate, and the first folded edge is spaced apart from the waterproof plate to define an inner gap segment in the airflow passage gap.

[0008] Optionally, the waterproof plate body is in direct contact with the shell cover.

[0009] Optionally, the edge of the waterproof plate away from the flow guide plate is bent toward the relative inward side of the waterproof plate to form a second folded edge, which is fitted with the shell cover.

[0010] Optionally, the first folded edge is provided with a through hole extending along the first direction; the high-voltage box further includes a bolt and a nut, the nut being connected to the waterproof plate, and the bolt passing through the through hole and threadedly connected to the nut.

[0011] Optionally, the nut protrudes from the outer surface of the waterproof panel along the first direction, and the nut is limited and supported between the waterproof panel and the first folded edge.

[0012] Optionally, the dimension of the heat dissipation opening along the second direction is greater than the dimension along the height direction of the housing; the second direction, the first direction, and the height direction of the housing are perpendicular to each other.

[0013] Optionally, a plurality of heat dissipation openings are provided at intervals along the second direction on the same side plate; the second direction, the first direction, and the height direction of the housing are perpendicular to each other.

[0014] Optionally, the high-voltage box also includes a plurality of nuts, and on the same side plate, a plurality of heat dissipation openings and a plurality of nuts are alternately arranged along the second direction.

[0015] Based on the same inventive concept, the second aspect of this application also provides an energy storage system, including a high-voltage box as described in the first aspect.

[0016] As can be seen from the above, the high-voltage box and energy storage system provided in this application, by setting heat dissipation openings on the side plate, help to improve the heat exchange efficiency between the inside of the high-voltage box and the outside, help to quickly reduce the internal temperature of the shell, ensure that the devices set inside the shell can work in a more suitable temperature environment, increase the service life of the devices by more than 30%, and reduce power consumption by more than 5%.

[0017] The heat dissipation opening is located near the opening end of the side plate, and a first folded edge is provided on the edge of the shell cover connected to the opening end. The first folded edge is spaced apart from the outer surface of the side plate, so as not to block the heat dissipation opening and to ensure that air can flow smoothly between the inside of the shell and the outside. At the same time, the orthogonal projection of the first folded edge along the first direction covers the heat dissipation opening, which can block liquid falling towards the heat dissipation opening and prevent liquid from entering the inside of the shell through the heat dissipation opening, which helps to improve the safety, reliability and service life of the high-voltage box.

[0018] In addition, this embodiment uses the first folded edge on the shell to shield and protect the heat dissipation opening, which can be applied to different installation scenarios of the high voltage box, which is conducive to achieving standardized design and improving design efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial side view of the high-voltage box of the first structure according to an embodiment of this application; Figure 2 for Figure 1 Partial cross-sectional diagram of section AA; Figure 3 for Figure 2 Enlarged schematic diagram of part B; Figure 4 This is a partial side view of the high-voltage box of the second structure according to an embodiment of this application; Figure 5 for Figure 4 Partial cross-sectional view of the CC section; Figure 6 for Figure 5 An enlarged schematic diagram of section D in the middle; Figure 7 for Figure 6 Partial schematic diagram of the view from the center E direction; Figure 8 This is a partial schematic diagram of the housing of the high-voltage box according to the second structure of this application.

[0021] Explanation of reference numerals in the attached figures: 100. Housing; 110. Side panel; 111. Main body; 112. Airflow guide plate; 113. Waterproof plate; 1131. Second folded edge; 120. Open end; 130. Heat dissipation opening; 200, Cover; 210, First folded edge; 220, Mounting through hole; 300, Bolt; 400, Nut; 500, Airflow gap; 510, Inner gap section; 520, Outer gap section. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0023] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0024] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0025] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] The applicant's research found that there are two main types of liquids in the energy storage container that can adversely affect the high-voltage box: one is the condensate formed on the battery pack, and the other is the coolant leaking from the liquid cooling pipes.

[0028] Regarding condensation, in energy storage containers, battery packs are often positioned close to the high-voltage box for easy cable connections and routing. When the battery packs are above the high-voltage box, the box generates heat during operation, which can cause condensation to form on the exposed metal parts of adjacent battery packs. As this condensation drips down, it may enter the high-voltage box through its ventilation windows, potentially damaging internal components.

[0029] Regarding the leaking coolant from the liquid cooling pipes, when there is a malfunction in the liquid cooling pipes, the coolant inside the liquid cooling pipes may seep out and drip onto the high-voltage box, and then enter the high-voltage box through the heat dissipation window on the high-voltage box, causing adverse effects on the internal components.

[0030] Based on the above, it can be seen that the liquids that can adversely affect the high-voltage box inside the energy storage container mainly drip from above onto the high-voltage box. In other words, if the liquid can be blocked above the heat dissipation window, the risk of liquid entering the high-voltage box through the heat dissipation window can be reduced.

[0031] In view of this, embodiments of this application provide a high-voltage box.

[0032] Figure 1 This diagram shows a partial side view of the high-voltage box with the first structure. Figure 2 Showing Figure 1 Partial cross-sectional diagram of section AA. Figure 3 Showing Figure 2 Enlarged diagram of part B.

[0033] like Figure 1 , Figure 2 and Figure 3 The high-voltage box provided in this application embodiment includes a housing 100 and a plurality of side plates 110, which together define an opening end 120; at least one side plate 110 has a heat dissipation opening 130 near the opening end 120, and the heat dissipation opening 130 is along a first direction (e.g., Figure 3 The X direction of the first direction is the thickness direction of the side plate 110; the cover 200 is sleeved and connected to the opening end 120, and the edge of the cover 200 forms a first folded edge 210 that bends toward the housing 100. The first folded edge 210 is arranged at intervals along the first direction on the opposite outer side of the side plate 110 to define an airflow passage gap 500 between the first folded edge 210 and the side plate 110; the orthographic projection of the first folded edge 210 along the first direction covers the heat dissipation opening 130.

[0034] It should be noted that, Figure 3 In the structure shown, the heat dissipation opening 130 is provided on the side plate 110 arranged along the X direction, therefore, for Figure 3 The structure has the first direction being the X direction. If the heat dissipation opening 130 is located on the side plate 110 located along the Y direction, then the first direction is the Y direction.

[0035] For example, the housing 100 may include a rectangular base plate, each edge of which is connected to a side plate 110, and the base plate and the multiple side plates 110 together form a housing 100 with a top opening.

[0036] For example, one or more heat dissipation openings 130 may be provided on each side plate 110.

[0037] For example, a cooling fan is provided inside the housing 100.

[0038] For example, the cover 200 can be fixed to the housing 100 by fasteners or clamps, and the upper opening of the housing 100 can be sealed.

[0039] In the high-voltage box of this embodiment, such as Figure 3 The heat dissipation opening 130 is located near the opening end 120 of the side plate 110, and the first folded edge 210 of the cover 200 is spaced apart from the outer surface of the side plate 110 along the first direction, such as... Figure 3 As shown by the dashed arrow, the gas inside the housing 100 passes through the heat dissipation opening 130 and the side plate 110, and then enters the airflow passage gap 500 between the side plate 110 and the first folded edge 210. After that, the gas can flow downward along the first folded edge 210 and be discharged from the high-pressure box after passing the lower edge of the first folded edge 210.

[0040] Of course, the gas outside the high-voltage box can also flow back into the housing 100 along the above path to allow gas circulation between the inside and outside of the housing 100, thereby improving the heat dissipation efficiency of the internal components of the high-voltage box.

[0041] When liquid drips into the heat dissipation opening 130, the first folded edge 210 can block the dripping liquid to achieve shielding and protection of the heat dissipation opening 130.

[0042] The high-voltage box provided in this embodiment, by providing heat dissipation openings 130 on the side plate 110, helps to improve the heat exchange efficiency between the inside of the high-voltage box and the outside, helps to quickly reduce the internal temperature of the housing 100, ensures that the devices installed inside the housing 100 can work in a more suitable temperature environment, increases the service life of the devices by more than 30%, and reduces power consumption by more than 5%.

[0043] A heat dissipation opening 130 is positioned on the side plate 110 near the opening end 120. A first folded edge 210 is provided on the edge of the cover 200 connected to the opening end 120. The first folded edge 210 is spaced apart from the outer surface of the side plate 110, ensuring that it does not block the heat dissipation opening 130 and allowing air to flow smoothly between the inside of the housing 100 and the outside. Simultaneously, the orthographic projection of the first folded edge 210 along the first direction covers the heat dissipation opening 130, which can block liquid falling towards the heat dissipation opening 130 and prevent liquid from entering the inside of the housing 100 through the heat dissipation opening 130, thus helping to improve the safety, reliability, and service life of the high-voltage box.

[0044] In addition, this embodiment uses the first folded edge 210 on the shell cover 200 to shield and protect the heat dissipation opening 130, which can be applied to different installation scenarios of the high voltage box (e.g., installation at the bottom, middle or top of the energy storage container), which is conducive to achieving standardized design and improving design efficiency.

[0045] Figure 4 This diagram shows a partial side view of the high-voltage box with the second structure. Figure 5 Showing Figure 4 Partial cross-sectional diagram of the CC section. Figure 6 Showing Figure 5 An enlarged schematic diagram of part D in the middle.

[0046] like Figure 4 , Figure 5 and Figure 6 In some embodiments, the side plate 110 includes a main body 111, a flow guide plate 112, and a waterproof plate 113. Multiple waterproof plates 113 of the multiple side plates 110 define the opening end 120 of the housing 100. The waterproof plates 113 are spaced apart along a first direction on opposite inner sides of the main body 111 and connected to the main body 111 via the flow guide plate 112, forming a Z-shaped structure, or in other words, a Z-shaped cross-section. Heat dissipation openings 130 are provided on the waterproof plates 113. Along the height direction of the housing 100 (e.g., ...), the openings are also spaced apart. Figure 6 (in the Z direction), the first fold 210 is spaced apart from the guide plate body 112 to define the outer gap section 520 in the airflow passage gap 500.

[0047] For example, the deflector body 112 may be parallel to the horizontal plane or inclined relative to the horizontal plane.

[0048] For example, the main body 111, the flow guide plate 112, and the waterproof plate 113 can be connected by welding or integral molding.

[0049] by Figure 6 Taking the structure and orientation shown as an example, the main body 111 and the waterproof plate 113 are vertically arranged, while the flow guide plate 112 is horizontally arranged. The left side of the side plate 110 is the relatively inner side, and the right side is the relatively outer side.

[0050] It should be noted that, as Figure 6 The first folded edge 210 is spaced apart from the waterproof plate body 113 to define the inner gap section 510 in the airflow passage gap 500.

[0051] In this embodiment, the bottom of the first folded edge 210 is spaced apart from the guide plate body 112 to define an outer gap section 520, thereby ensuring that the airflow can communicate with the outside through the gap 500. Figure 6 As shown by the dashed arrow, the gas present in the airflow through the gap 500 can flow outward along the guide plate 112 and be discharged from the high-pressure box after passing through the outer gap section 520.

[0052] It should also be noted that in the first type of high-pressure box, there is a risk that external liquid may enter the heat dissipation opening 130 after entering the airflow through the gap 500. Compared to the first type of high-pressure box, this embodiment provides a guide plate 112 below the first folded edge 210 to define the outer gap section 520. In this case, external liquid needs to pass through the outer gap section 520 first, and then through the inner gap section 510 before reaching the heat dissipation opening 130, thus further reducing the risk of liquid entering the housing 100.

[0053] Understandably, the larger the dimension of the outer gap section 520 along the first direction, the greater the risk of liquid passing through the outer gap section 520. The dimension of the outer gap section 520 can be adjusted by designing the relative position between the guide plate 112 and the first folded edge 210.

[0054] Specifically, such as Figure 6 In some embodiments, along a first direction, a first folded edge 210 is disposed between the main body 111 and the waterproof plate 113, and the first folded edge 210 and the waterproof plate 113 are spaced apart to define an inner gap segment 510 in the airflow passage gap 500.

[0055] Since the first folded edge 210 in this embodiment is located between the main body 111 and the waterproof plate 113, the corresponding outer gap section 520 is also located in the middle of the guide plate 112 along the first direction. Figure 6 As shown by the hollow arrow, when liquid is shot from bottom to top toward the first folded edge 210, the main body 111 connected to the edge of the guide plate 112 can block the incoming liquid, reducing the risk of liquid entering the outer gap section 520, and further reducing the risk of liquid entering the housing 100.

[0056] like Figure 6 In some embodiments, the waterproof plate 113 is in direct contact with the cover 200.

[0057] As can be seen from the foregoing, by setting the first folded edge 210, the waterproof plate 113, and the guide plate 112, external liquid can be effectively prevented from passing through the inner gap section 510 and reaching the heat dissipation opening 130. For example... Figure 6 The waterproof plate 113 contacts the cover 200 above the heat dissipation opening 130. Since the risk of external liquid reaching the heat dissipation opening 130 is low, the risk of it reaching the contact point between the waterproof plate 113 and the cover 200 is even lower. Therefore, even without a seal between the housing 100 and the cover 200, it can be ensured that external liquid will not enter the interior of the housing 100 through the connection between the opening end 120 of the housing 100 and the cover 200.

[0058] The absence of a seal between the opening 120 of the housing 100 and the cover 200 not only reduces the material cost of the high-voltage box but also simplifies the assembly process, improves assembly efficiency, and facilitates mass production.

[0059] like Figure 6 In some embodiments, the edge of the waterproof plate 113 away from the flow guide plate 112 is bent toward the opposite inner side of the waterproof plate 113 to form a second folded edge 1131, which is fitted with the shell cover 200.

[0060] Combination Figure 6 As can be seen, the first folded edge 210 of the cover 200 and the guide plate 112 are spaced apart along the height direction of the housing 100. Since the guide plate 112 cannot support the cover 200, the housing 100 will support the cover 200 through the waterproof plate 113. It is understandable that the larger the contact area between the waterproof plate 113 and the cover 200, the more stable the support of the waterproof plate 113 on the cover 200.

[0061] In view of this, this embodiment provides a second folded edge 1131 on the waterproof plate 113 and makes the second folded edge 1131 fit against the shell cover 200. This helps to increase the contact area between the waterproof plate 113 and the shell cover 200, which can not only ensure that the shell cover 200 can be supported stably and reliably, but also increase the path length of external liquid passing through the gap between the waterproof plate 113 and the shell cover 200 along the first direction, thereby improving the sealing effect between the shell 100 and the shell cover 200 and further preventing external liquid from entering the interior of the shell 100.

[0062] like Figure 6 In some embodiments, the first folded edge 210 is provided with a through mounting hole 220 extending along the first direction; the high-voltage box also includes a bolt 300 and a nut 400, the nut 400 being connected to the waterproof plate 113, and the bolt 300 passing through the through mounting hole 220 and being threadedly connected to the nut 400.

[0063] For example, the nut 400 and the waterproof plate 113 can be connected in a sealed manner by riveting, welding or snap-fitting.

[0064] For example, the nut 400 may be a waterproof nut 400, which is closed at one end toward the inside of the housing 100.

[0065] There will inevitably be a certain assembly gap between the mounting through hole 220 and the bolt 300. If the central axis of the mounting through hole 220 is set vertically, then liquid dripping on the cover 200 can easily flow to the housing 100 through this assembly gap.

[0066] To avoid the above problems, in this embodiment, the mounting through hole 220 is set on the first folded edge 210 so that the central axis of the mounting through hole 220 is set laterally, reducing the risk of liquid passing through the mounting through hole 220.

[0067] Meanwhile, even if liquid passes through the mounting through-hole 220 and enters the inner gap section 510, it will be blocked by the vertically set waterproof plate 113 (understandably, the nut 400 needs to be set on the solid structure, so the heat dissipation opening 130 will not be set in the same position), and the liquid will flow out of the high-pressure box in sequence along the waterproof plate 113, the guide plate 112 and the main plate 111, and will not flow into the interior of the housing 100.

[0068] like Figure 6 In some embodiments, the nut 400 protrudes from the outer surface of the waterproof plate 113 along a first direction, and the nut 400 is limited and supported between the waterproof plate 113 and the first folded edge 210.

[0069] For example, the nut 400 extends in a first direction away from the waterproof plate 113.

[0070] For example, the free end of the nut 400 (i.e., the end of the nut 400 away from the waterproof plate 113) is in contact with or close to the inner surface of the first fold 210.

[0071] As can be seen from the foregoing, the first folded edge 210 needs to be spaced apart from the waterproof plate 113 to form an inner gap section 510 for gas flow. However, during assembly, taking the rectangular shell 100 and the shell cover 200 as an example, the four first folded edges 210 provided along the four edges of the shell cover 200 all need to be spaced apart from the corresponding waterproof plate 113. If a limiting structure is not provided to limit the position of the shell cover 200 in the horizontal direction, it is difficult to achieve accurate alignment between the shell cover 200 and the shell 100.

[0072] Therefore, in this embodiment, the nut 400 is designed to protrude from the outer surface of the waterproof plate 113, and the protrusion size of the nut 400 can be designed according to the size of the inner gap section 510 along the first direction. When assembling the cover 200, the free end of the nut 400 can limit the position of the first folded edge 210. On the one hand, this facilitates accurate horizontal alignment between the cover 200 and the housing 100; on the other hand, when tightening the bolt 300, the free end of the nut 400 can support the first folded edge 210 from the relatively inner side, preventing the first folded edge 210 from deforming inward under the pressure of the bolt 300 nut.

[0073] Figure 7 Showing Figure 6 A partial schematic diagram of the viewpoint from the center (E).

[0074] like Figure 7In some embodiments, the heat dissipation opening 130 is along the second direction (e.g., Figure 7 The dimension L in the Y direction is greater than the dimension H along the height direction of the housing 100; the second direction, the first direction and the height direction of the housing 100 are perpendicular to each other.

[0075] For example, the heat dissipation opening 130 is a horizontally arranged elongated hole.

[0076] As described above, the first folded edge 210 needs to block the heat dissipation opening 130. To reduce the material cost of the cover 200, it is necessary to avoid the first folded edge 210 being too large along the height direction of the housing 100. Consequently, this would limit the size of the heat dissipation opening 130 along the height direction of the housing 100. To increase the area of ​​the heat dissipation opening 130, this embodiment increases the size of the heat dissipation opening 130 along the second direction to increase the flow of gas through the heat dissipation opening 130, thereby improving the heat dissipation efficiency of the high-voltage box.

[0077] Of course, in order to increase the flow of gas through the heat dissipation opening 130, in addition to increasing the area of ​​the heat dissipation opening 130 as mentioned above, the number of heat dissipation openings 130 can also be increased.

[0078] Figure 8 A partial schematic diagram of the housing 100 of the high-voltage box with the second structure is shown.

[0079] like Figure 7 and Figure 8 In some embodiments, a plurality of heat dissipation openings 130 are provided at intervals along the second direction on the same side plate 110.

[0080] For example, each side panel 110 is provided with multiple heat dissipation openings 130.

[0081] According to the heat dissipation requirements of the high-voltage box, multiple heat dissipation openings 130 can be set on the same side plate 110. Gas can flow through multiple heat dissipation openings 130 to increase the amount of gas flowing between the inside and outside of the housing 100 per unit time.

[0082] like Figure 7 and Figure 8 In some embodiments, the high-voltage box also includes a plurality of nuts 400, and on the same side plate 110, a plurality of heat dissipation openings 130 and a plurality of nuts 400 are alternately arranged along a second direction.

[0083] For example, each heat dissipation opening 130 is provided with a nut 400 on each of its opposite sides along the second direction.

[0084] As can be seen from the foregoing, the nut 400 can limit the first folded edge 210. Since the first folded edge 210 has a large length along the second direction, setting multiple nuts 400 can limit different areas of the first folded edge 210 along the second direction, so as to further ensure that the inner gap section 510 has uniform size.

[0085] Meanwhile, multiple nuts 400 and multiple heat dissipation openings 130 are alternately arranged, which can better constrain the area of ​​the first folded edge 210 corresponding to the heat dissipation opening 130 by the nuts 400, so as to ensure that the dimensions of the inner gap section 510 along the first direction meet the design requirements.

[0086] Based on the same inventive concept and in conjunction with the description of the high-voltage boxes in the above embodiments, this embodiment provides an energy storage system that has the corresponding technical effects of the high-voltage boxes in the above embodiments, which will not be repeated here.

[0087] An energy storage system includes a high-voltage box as described in the various embodiments above.

[0088] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0089] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0091] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0092] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0093] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A high-voltage box, characterized in that, include: The housing includes a plurality of side plates that surround and define an opening end; at least one of the side plates has a heat dissipation opening near the opening end, the heat dissipation opening penetrating the side plate along a first direction; the first direction is the thickness direction of the side plate; A cover is fitted onto the opening end, and the edge of the cover has a first folded edge that bends toward the housing. The first folded edges are spaced apart along the first direction on the opposite outer side of the side plate to define an airflow gap between the first folded edges and the side plate. The orthographic projection of the first folded edges along the first direction covers the heat dissipation opening.

2. The high-voltage box according to claim 1, characterized in that, The side plate includes a main body, a flow guide plate, and a waterproof plate. The multiple waterproof plates of the multiple side plates define the opening end of the housing. The waterproof plates are spaced apart along the first direction on the opposite inner side of the main body and connected to the main body through the flow guide plate, and are configured into a Z-shaped structure. The heat dissipation opening is disposed on the waterproof plate; along the height direction of the shell, the first folded edge is spaced apart from the guide plate to define the outer gap section in the airflow passage gap.

3. The high-voltage box according to claim 2, characterized in that, Along the first direction, the first folded edge is disposed between the main body and the waterproof plate, and the first folded edge is spaced apart from the waterproof plate to define an inner gap segment in the airflow passage gap.

4. The high-voltage box according to claim 2, characterized in that, The waterproof panel is in direct contact with the shell cover.

5. The high-voltage box according to claim 4, characterized in that, The edge of the waterproof plate away from the flow guide plate is bent toward the inner side of the waterproof plate to form a second folded edge, which is fitted with the shell cover.

6. The high-voltage box according to claim 2, characterized in that, The first folded edge is provided with a through hole extending along the first direction; The high-voltage box also includes bolts and nuts, the nuts being connected to the waterproof plate, and the bolts passing through the mounting through holes and threadedly connected to the nuts.

7. The high-voltage box according to claim 6, characterized in that, The nut protrudes from the outer surface of the waterproof plate along the first direction, and the nut is limited and supported between the waterproof plate and the first folded edge.

8. The high-voltage box according to claim 1, characterized in that, The dimension of the heat dissipation opening along the second direction is greater than the dimension along the height direction of the housing; the second direction, the first direction, and the height direction of the housing are perpendicular to each other.

9. The high-voltage box according to claim 1, characterized in that, Multiple heat dissipation openings are provided at intervals along the second direction on the same side plate; the second direction, the first direction, and the height direction of the housing are perpendicular to each other.

10. The high-voltage box according to claim 9, characterized in that, The high-voltage box also includes multiple nuts, and on the same side plate, multiple heat dissipation openings and multiple nuts are alternately arranged along the second direction.

11. An energy storage system, characterized in that, Includes the high-voltage box as described in any one of claims 1 to 10.

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