High-voltage control box and battery cabinet

Abstract

The utility model provides a high-voltage control box. The high-voltage control box comprises a box body, a cover plate, a fastener, a sealing element and a limiting element, the box body is provided with a first waterproof surface and a containing cavity with an opening formed in the first waterproof surface; the sealing piece is arranged on the first waterproof face and surrounds the opening, the size of the sealing piece in the non-deformation initial state in the first direction is L1, and the first direction is the orientation of the first waterproof face; the cover plate is connected to the side, away from the box body, of the sealing piece and provided with a second waterproof face. The fastening piece is used for connecting the box body and the cover plate and enabling the box body and the cover plate to clamp the sealing piece; the size of the limiting piece arranged between the first waterproof face and the second waterproof face in the first direction is L2, and L2 is smaller than L1. The high-pressure control box provided by the embodiment of the utility model can prevent the sealing element from being excessively extruded, thereby prolonging the service life. The utility model further provides a battery cabinet which comprises a battery cluster, a liquid cooling pipeline and the high-voltage control box. According to the scheme, the liquid in the liquid cooling pipeline does not easily enter the accommodating cavity from the air inlet.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a high-voltage control box and a battery cabinet. Background Art

[0002] The high-voltage control box in the energy storage system not only controls the on-off of the DC circuit switch of the battery cluster, protects the battery cluster, samples voltage, collects current, and controls the internal communication of the battery cluster, but is usually placed in the battery cabinet together with the battery cluster. In order to ensure that the operating temperature of the battery cluster is not too high, a liquid cooling system is usually provided in the battery cabinet, so that the condensed water formed in the battery cabinet or the coolant seeping from the liquid cooling system may enter the high-voltage control box and damage the electronic components in the high-voltage control box. For this reason, in some technologies, a seal is provided at the opening of the high-voltage control box, and the cover plate and the box body are clamped and deformed to achieve the effect of sealing and waterproofing. However, the seal is usually made of rubber, plastic or other elastic materials. These materials will undergo elastic deformation when subjected to external force, but when the deformation exceeds its elastic limit, the material will undergo plastic deformation or permanent deformation to reduce the sealing effect, thereby reducing the waterproof effect of the high-voltage control box and reducing the service life of the high-voltage control box. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a high-voltage control box, which can ensure the waterproof effect of the high-voltage control box to extend the service life.

[0004] The utility model also provides a battery cabinet having the high-voltage control box.

[0005] According to the first aspect of the present invention, the high-voltage control box includes: a box body, a cover plate, a fastener, a sealing member and a limit member.

[0006] The box body has a first waterproof surface, and a accommodating cavity with an opening formed on the first waterproof surface; the sealing member is arranged on the first waterproof surface and surrounds the opening, the sealing member is an elastic structure, and the sealing member has an undeformed initial state. When the sealing member is in the initial state, the dimension of the sealing member along the first direction is L1, and the first direction is the direction of the first waterproof surface; the cover plate is connected to the side of the sealing member facing away from the box body, and the cover plate has a second waterproof surface on the side opposite to the first direction; the fastener is used to connect the box body and the cover plate, and make the box body and the cover plate clamp the sealing member to deform the sealing member; the limiting member is arranged between the first waterproof surface and the second waterproof surface, the dimension of the limiting member along the first direction is L2, L2 is smaller than L1, and is used to limit the maximum deformation of the sealing member so that the deformation of the sealing member is smaller than the elastic limit value.

[0007] The high voltage control box according to the embodiment of the utility model has at least the following beneficial effects:

[0008] A limiting member is arranged between the first waterproof surface and the second waterproof surface. Along the first direction, the size of the limiting member is smaller than the size of the seal in the initial state. Therefore, in the process of locking the cover plate and the box body by the fastener, the limiting member can limit the minimum distance between the first waterproof surface and the second waterproof surface, thereby limiting the maximum deformation of the seal so that the maximum deformation of the seal is smaller than the elastic limit value, thereby enabling the seal to maintain a better sealing effect, thereby improving the waterproof performance of the high-pressure control box and extending the service life of the high-pressure control box.

[0009] According to some embodiments of the present invention, the limiting member is sleeved on the outside of the fastener.

[0010] According to some embodiments of the present utility model, the box body has a flange structure extending outward at the opening, and the flange structure has the first waterproof surface.

[0011] According to some embodiments of the utility model, the seal is an annular structure adapted to the contour of the opening, and the fastener includes a first connecting part, a second connecting part and a fastening shaft; one end of the fastening shaft is connected to the first connecting part, and the other end is connected to the second connecting part, the first connecting part is connected to the box body, and the second connecting part is connected to the cover plate, and at least part of the seal is located between the fastening shaft and the edge of the opening.

[0012] According to some embodiments of the present invention, the outer side surface of the sealing element has a notch, and the inner wall of the notch, the first waterproof surface and the second waterproof surface jointly define a limiting cavity, and at least a portion of the limiting element is accommodated in the limiting cavity.

[0013] According to some embodiments of the present invention, the limiting member is connected to the box body.

[0014] A battery cabinet according to an embodiment of the second aspect of the utility model comprises: a battery cluster, a liquid cooling pipe and a high-voltage control box as described in any of the above embodiments.

[0015] The cover plate is connected to a side of the battery cluster opposite to the first direction, and the accommodating cavity has a first mounting wall arranged opposite to the opening; the first mounting wall is arranged opposite to the opening and has an air inlet, the accommodating cavity is connected to the outside through the air inlet, and the air inlet is used to supply outside air to enter the accommodating cavity;

[0016] The liquid cooling pipe is used to cool the battery cluster and is arranged to avoid the air inlet.

[0017] The battery cabinet according to the embodiment of the utility model has at least the following beneficial effects: the battery cluster can dissipate its own heat through the liquid cooling pipe; the high-voltage control box can receive air from the outside through the air inlet, so that the gas with a certain amount of heat in the accommodating chamber can be exchanged with the relatively low-heat gas in the outside through the air inlet, thereby increasing the heat dissipation efficiency of the high-voltage control box; on the basis of achieving heat dissipation for the battery cluster, the liquid cooling pipe avoiding the air inlet setting can prevent the liquid in the liquid cooling pipe from entering the accommodating chamber from the air inlet.

[0018] According to some embodiments of the utility model, the accommodating chamber also has a side wall surrounding the first mounting wall; the side wall has an air outlet connected to the accommodating chamber, the accommodating chamber is connected to the outside through the air outlet, and the air outlet is used to discharge the gas in the accommodating chamber; the air outlet is arranged to avoid the liquid cooling pipe.

[0019] According to some embodiments of the utility model, the high-voltage control box also includes a shielding member, the shielding member includes a shielding portion, the shielding member is connected to the outer wall of the box body, and the shielding portion is arranged at the upper edge of the air outlet, along the second direction, the size of the shielding portion is not smaller than the size of the air outlet, and the second direction, the direction of the air outlet and the vertical direction are perpendicular to each other.

[0020] According to some embodiments of the present utility model, the shielding member further includes a fence provided along a side edge of the shielding portion, and the fence protrudes downward from the shielding portion.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 It is a front view of a high voltage control box of some embodiments of the utility model;

[0024] Figure 2 for Figure 1 A partial cross-sectional view shown in FIG.

[0025] Figure 3 It is a front view of a high-voltage control box of some other embodiments of the utility model;

[0026] Figure 4 for Figure 3 A partial cross-sectional view shown at B;

[0027] Figure 5 It is a top view of a high voltage control box of some embodiments of the utility model;

[0028] Figure 6 Schematic diagram of device distribution of battery cabinets in some embodiments of the utility model;

[0029] Figure 7 This is an overall schematic diagram of the high-voltage control box of some embodiments of the utility model from another perspective;

[0030] Figure 8 for Figure 7 The local enlarged view shown at C;

[0031] Fig. 9 for Figure 7 Schematic diagram of the blocking member shown in FIG.

[0032] Reference numerals:

[0033] High voltage control box 10,

[0034] Box body 100, accommodating cavity 110, opening 120, first waterproof surface 130, flange structure 140, first mounting wall 150, side wall 160, air inlet 170, air outlet 180;

[0035] Cover plate 200, second waterproof surface 210;

[0036] The fastener 400, the first connecting portion 410, the second connecting portion 420, and the fastening shaft 430;

[0037] Sealing member 500, notch 510;

[0038] Limiting member 600;

[0039] Limiting cavity 700;

[0040] Shielding member 800, shielding portion 810, enclosure 820;

[0041] Battery cluster 20;

[0042] Liquid cooling pipe 30. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 on the present invention.

[0045] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] Please refer to Figure 1 , Figure 2 ,in Figure 1 This is a front view of the high voltage control box 10 of some embodiments of the utility model. Figure 2 for Figure 1The utility model provides a high-voltage control box 10, including a box body 100, a sealing member 500, a cover plate 200, a fastener 400, and a stopper 600; the box body 100 has a first waterproof surface 130, and a receiving cavity 110 with an opening 120 formed on the first waterproof surface 130; the sealing member 500 is arranged on the first waterproof surface 130 and surrounds the opening 120, the sealing member 500 is an elastic structure, and the sealing member 500 has an initial state without deformation. When the sealing member 500 is in the initial state, the size of the sealing member 500 along the first direction is L1, and the first direction is the first waterproof surface 130; the cover plate 200 is connected to the side of the sealing member 500 facing away from the box body 100, and the cover plate 200 has a second waterproof surface 210 on the side opposite to the first direction; the fastener 400 is used to connect the box body 100 and the cover plate 200, and make the box body 100 and the cover plate 200 clamp the sealing member 500 to deform the sealing member 500; the limiter 600 is arranged between the first waterproof surface 130 and the second waterproof surface 210, and the size of the limiter 600 along the first direction is L2, L2 is smaller than L1, and is used to limit the maximum deformation of the sealing member 500, so that the deformation of the sealing member 500 is smaller than the elastic limit value.

[0049] A limiting member 600 is arranged between the first waterproof surface 130 and the second waterproof surface 210. Along the first direction, the size of the limiting member 600 is smaller than the size of the sealing member 500 in the initial state. Therefore, in the process of locking the cover plate 200 and the box body 100 by the fastener 400, the limiting member 600 can limit the minimum distance between the first waterproof surface 130 and the second waterproof surface 210, thereby limiting the maximum deformation of the sealing member 500 so that the maximum deformation of the sealing member 500 is smaller than the elastic limit value, thereby enabling the sealing member 500 to maintain a better sealing effect, thereby improving the waterproof performance of the high pressure control box 10, and thus extending the service life of the high pressure control box 10.

[0050] Please refer to Figure 2The working principle of the limiter 600 is further described below. The limiter 600 is compressed by the first waterproof surface 130 and the second waterproof surface 210. The seal 500 can produce a waterproof effect when compressed. The difference between the size of the seal 500 in the first direction and L1 when compressed is the compression amount of the seal 500, and the ratio of the compression amount to L1 is the compression rate. Increasing the compression rate of the seal 500 to a certain extent can enhance the sealing performance of the seal 500. When the compression rate of the seal 500 continues to increase to the elastic limit value, the seal 500 will produce plastic deformation due to excessive compression, so that the seal 500 will not be compressed by the first waterproof surface 130 and the second waterproof surface 210. The waterproof surface 130 and the second waterproof surface 210 will not restore their elasticity when compressed, thereby causing a gap between the seal 500 and the first waterproof surface 130 or the second waterproof surface 210; the elastic limit value of the seal 500 is affected by its own material. Those skilled in the art can make the limiter 600 support the first waterproof surface 130 and the second waterproof surface 210 when the size of the seal 500 in the first direction is close to the elastic limit value according to the material of the seal 500, thereby preventing the first waterproof surface 130 and the second waterproof surface 210 from continuing to approach each other, slowing down the further compression of the seal 500, and extending the duration of the seal 500 having a sealing effect.

[0051] Exemplarily, in some embodiments, the seal 500 is made of EPDM rubber, but not limited thereto. The compression amount of EPDM rubber with optimal waterproof performance is 30%, and the maximum compression amount that can ensure the sealing performance is 50%. The size of the limiter 600 can be set to 50% to 70% of the seal 500, thereby ensuring that the maximum compression amount of the EPDM rubber gradually decreases to 50%, so that the limiter 600 supports the first waterproof surface 130 and the second waterproof surface 210, thereby enhancing the sealing performance of the seal 500 under long-term operation.

[0052] It should be noted that the stoppers 600 made of different materials can support the first waterproof surface 130 and the second waterproof surface 210. As a preferred solution, those skilled in the art can use the stoppers 600 supported by rigid materials to further enhance the stopper effect of the stoppers 600.

[0053] On the other hand, those skilled in the art may use commonly used fasteners 400 to fasten the cover plate 200 and the box body 100, thereby compressing the seal 500; without departing from the inventive concept of the utility model, the position of the fastener 400 may be set on the outside of the first waterproof surface 130 or the second waterproof surface 210; the fastener 400 may be a standard part such as a bolt, a pin or a rivet.

[0054] As a preferred option, please refer to Figure 2In some embodiments, the fastener 400 includes a first connection part 410, a second connection part 420 and a fastening shaft 430; one end of the fastening shaft 430 is connected to the first connection part 410, and the other end is connected to the second connection part 420, the first connection part 410 is connected to the box body 100, and the second connection part 420 is connected to the cover plate 200; at least part of the sealing member 500 is located between the fastening shaft 430 and the edge of the opening 120. Through the above scheme, when the external liquid flows into the first waterproof surface 130 and the second waterproof surface 210 through the gap between the fastener 400 and the cover plate 200, it will also be blocked by the sealing member 500, and the sealing member 500 can still play a waterproof effect.

[0055] For further information, please refer to Figure 4 , Figure 5 In some embodiments, the outer side of the sealing member 500 has a notch 510, and the inner wall of the notch 510, the first waterproof surface 130, and the second waterproof surface 210 jointly define a limiting cavity 700, and at least part of the limiting member 600 is accommodated in the limiting cavity 700. When liquid enters the limiting cavity 700 from the gap between the fastener 400 and the cover plate 200, since the limiting cavity 700 is connected to the outside, the liquid entering the limiting cavity 700 can naturally flow out of the limiting cavity 700 to the outside, avoiding long-term accumulation in the limiting cavity 700 and erosion of the limiting member 600, waterproof parts and other parts. On the other hand, since the limiting member 600 is accommodated in the notch 510 of the sealing member, the space occupied by the limiting member 600 can be reduced.

[0056] For further information, please refer to Figure 3 , Figure 4 , Figure 5 ,in Figure 3 It is a front view of the high voltage control box 10 of some other embodiments of the utility model. Figure 4 for Figure 3 The partial cross-sectional view shown at B, Figure 5 The position of the stopper 600 in Figure 4 The position of the limiting member 600 in the figure corresponds to, Figure 5 The cover plate 200 is not shown; in some embodiments, the stopper 600 is sleeved on the outside of the fastener 400. Through the above solution, after the stopper 600 is installed, the fastener 400 can be positioned by the stopper 600, which facilitates the installation of the fastener 400. On the other hand, the stopper 600 is sleeved on the outside of the fastener 400, which can also make the stopper 600 increase its own strength by using the fastener 400 and reduce its own space occupation, so that those skilled in the art can set more sealing members 500 to enhance the waterproof effect.

[0057] Furthermore, in some embodiments, the limit member 600 is directly connected to the box body 100. The limit member 600 connected to the box body 100 can also avoid shaking between the first waterproof surface 130 and the second waterproof surface 210 due to external factors such as vibration in the working state, thereby maintaining a more stable state and reducing fatigue damage accumulated under long-term working conditions; in addition, it can also simplify installation.

[0058] For further information, please refer to Figure 4 In some embodiments, the box body 100 has a flange structure 140 extending outward at the opening 120, and the flange structure 140 has a first waterproof surface 130. Through the above solution, the flange structure 140 of the box body 100 forms the first waterproof surface 130, and the fastener 400 can fix the cover plate 200 through the flange structure 140. Those skilled in the art can increase the installation specifications of the seal 500 by setting the specifications of the flange structure 140 to enhance the waterproof effect; on the other hand, the flange structure 140 can further prevent liquid from flowing into the accommodating cavity 110 from the gap between the fastener 400 and the box body 100.

[0059] Please refer to Figure 6 , Figure 7 ,in Figure 6 This is a schematic diagram of the device distribution of the battery cabinet in some embodiments of the utility model. Figure 7 It is an overall schematic diagram of the high-voltage control box 10 of some embodiments of the utility model from another perspective; the utility model also proposes a battery cabinet, including a battery cluster 20, a liquid cooling pipe 30 and the high-voltage control box 10 of any one of the above embodiments; the cover plate 200 of the high-voltage control box 10 is connected to the side of the battery cluster 20 opposite to the first direction, and the accommodating cavity 110 has a first mounting wall 150 arranged opposite to the opening 120; the first mounting wall 150 is arranged opposite to the opening 120, and has an air inlet 170, the accommodating cavity 110 is connected to the outside through the air inlet 170, and the air inlet 170 is used to supply outside air to enter the accommodating cavity 110; the liquid cooling pipe 30 is used to cool the battery cluster 20, and is arranged to avoid the air inlet 170.

[0060] Through the above scheme, the battery cluster 20 can dissipate its own heat through the liquid cooling pipe 30; the high-voltage control box 10 can receive air from the outside through the air inlet 170, so that the gas with a certain amount of heat in the accommodating chamber 110 can be exchanged with the relatively low-heat gas in the outside through the air inlet 170, thereby increasing the heat dissipation efficiency of the high-voltage control box 10; on the basis of achieving heat dissipation for the battery cluster 20, the liquid cooling pipe 30 avoids the air inlet 170 to prevent the liquid in the liquid cooling pipe from entering the accommodating chamber 110 from the air inlet 170.

[0061] It should be noted that the term “the liquid cooling pipe 30 is arranged to avoid the air inlet 170” in the present invention should be understood by those skilled in the art to mean that the liquid cooling pipe 30 is arranged on a different side from the first installation wall 150. For example, please refer to Figure 6 , Figure 7 In some embodiments, the high-voltage control box 10 is disposed below the battery cluster 20, the cover plate 200 located on the upper side of the high-voltage control box 10 is connected to the battery cluster 20, and the first mounting wall 150 is located on the lower side of the high-voltage control box 10; the liquid cooling pipe 30 is disposed on the right side of the battery cluster 20, so when the liquid cooling pipe 30 leaks or moisture in the air condenses into dew on the liquid cooling pipe 30, it is difficult for the liquid to splash from one side of the liquid cooling pipe 30 to the air inlet 170 disposed on the first mounting wall 150 and enter the interior of the accommodating cavity 110. Please refer to Figure 6 In some embodiments, the liquid cooling pipe 30 can also be set on the upper side, front side, rear side or left side of the battery cluster 20; based on the above embodiment, the liquid cooling pipe 30 can also be set on the front side, rear side, left side or right side of the high-voltage control box 10.

[0062] For further information, please refer to Figure 6 , Figure 7 In some embodiments, the accommodating chamber of the high-voltage control box 10 further has a side wall 160 surrounding the first mounting wall 150; the side wall 160 has an air outlet 180 communicating with the accommodating chamber 110, the accommodating chamber 110 communicates with the outside through the air outlet 180, and the air outlet 180 is used to discharge the gas in the accommodating chamber 110; the air outlet 180 avoids the liquid cooling pipe 30. Through the above scheme, air can enter the accommodating chamber 110 from the outside through the air inlet 170, and return to the outside from the air outlet 180 after absorbing the heat in the accommodating chamber 110, so as to achieve the heat dissipation of the high-voltage control box 10; at the same time, because the air outlet 180 avoids the liquid cooling pipe 30, the liquid in the liquid cooling pipe 30 is not easy to enter the air outlet 180, thereby preventing the liquid from entering the high-voltage control box 10 from the air outlet 180. Without departing from the inventive concept of the utility model, those skilled in the art can set more air outlets 180 on the box body 100.

[0063] For further information, please refer to Figures 7 to 9 ,in Figure 8 for Figure 7 In the partial enlarged view shown at C in the middle, in some embodiments, the high-voltage control box 10 further includes a shielding member 800, the shielding member 800 includes a shielding portion 810, the shielding member 800 is connected to the outer wall of the box body 100, and the shielding portion 810 is arranged at the upper edge of the air outlet 180, along the second direction (the second direction, the direction of the air outlet 180 and the vertical direction are perpendicular to each other, and the first direction is also Figure 8), the size of the shielding portion 810 is not less than the size of the air outlet 180, and the second direction, the direction of the air outlet 180 and the vertical direction are perpendicular to each other. Through the above scheme, the shielding portion 810 can block the liquid above the air outlet 180, reducing the possibility of the liquid flowing into the air outlet 180 along the side wall 160 of the box body 100. The above has mentioned the scheme of providing more air outlets 180 on the box body 100; without departing from the inventive concept of the utility model, those skilled in the art can also provide shielding portions 810 on multiple air outlets 180, thereby further reducing the possibility of the liquid flowing into the air outlet 180 along the side wall 160 of the box body 100.

[0064] As a preferred option, please refer to Figure 8 As shown, the shielding member 800 also includes a baffle 820 arranged along the side edge of the shielding portion 810, and the baffle 820 protrudes downward from the shielding portion 810. The baffle 820 protruding downward from the shielding portion 810 can prevent liquid from splashing into the accommodating cavity 110 in a horizontal direction, thereby enhancing the waterproof effect at the air outlet 180.

[0065] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. High voltage control box, characterized in that: include: The box body has a first waterproof surface and a receiving cavity with an opening formed on the first waterproof surface; A sealing member, arranged on the first waterproof surface and surrounding the opening, the sealing member is an elastic structure, the sealing member has an initial state without deformation, when the sealing member is in the initial state, the dimension of the sealing member along a first direction is L1, the first direction is the direction of the first waterproof surface; A cover plate connected to a side of the sealing member facing away from the box body, the cover plate having a second waterproof surface on a side opposite to the first direction; A fastener, used to connect the box body and the cover plate, and to enable the box body and the cover plate to clamp the sealing member so as to deform the sealing member; A limiter is arranged between the first waterproof surface and the second waterproof surface, and a dimension of the limiter along the first direction is L2, where L2 is smaller than L1, and is used to limit the maximum deformation of the seal so that the deformation of the seal is smaller than the elastic limit value.

2. The high voltage control box according to claim 1, characterized in that: The limiting piece is sleeved on the outer side of the fastening piece.

3. The high voltage control box according to claim 1, characterized in that: The box body has a flange structure extending outward at the opening, and the flange structure has the first waterproof surface.

4. The high voltage control box according to claim 1, characterized in that: The sealing member is an annular structure adapted to the contour of the opening, and the fastener comprises a first connecting portion, a second connecting portion and a fastening shaft; one end of the fastening shaft is connected to the first connecting portion, and the other end is connected to the second connecting portion, the first connecting portion is connected to the box body, and the second connecting portion is connected to the cover plate, and at least part of the sealing member is located between the fastening shaft and the edge of the opening.

5. The high voltage control box according to claim 4, characterized in that: The outer side surface of the sealing member has a notch, and the inner wall of the notch, the first waterproof surface and the second waterproof surface jointly define a limiting cavity, and at least a part of the limiting member is accommodated in the limiting cavity.

6. The high voltage control box according to claim 3, characterized in that: The limiting member is connected to the box body.

7. Battery cabinet, characterized in that: include: Battery clusters; The high-voltage control box according to any one of claims 1 to 6, wherein the cover plate is connected to a side of the battery cluster opposite to the first direction, and the accommodating cavity has a first mounting wall arranged opposite to the opening; the first mounting wall is arranged opposite to the opening and has an air inlet, the accommodating cavity is connected to the outside through the air inlet, and the air inlet is used to supply outside air to enter the accommodating cavity; The liquid cooling pipe is used to cool the battery cluster and is arranged to avoid the air inlet.

8. The battery cabinet according to claim 7, characterized in that: The accommodating chamber also has a side wall surrounding the first mounting wall; the side wall has an air outlet connected to the accommodating chamber, the accommodating chamber is connected to the outside through the air outlet, and the air outlet is used for discharging the gas in the accommodating chamber; the air outlet is arranged to avoid the liquid cooling pipe.

9. The battery cabinet according to claim 8, characterized in that: The high-voltage control box also includes a shielding member, which includes a shielding portion. The shielding member is connected to the outer wall of the box body, and the shielding portion is arranged at the upper edge of the air outlet. Along the second direction, the size of the shielding portion is not less than the size of the air outlet, and the second direction, the direction of the air outlet and the vertical direction are perpendicular to each other.

10. The battery cabinet according to claim 9, characterized in that: The shielding member further comprises a fence arranged along a side edge of the shielding portion, and the fence protrudes downward from the shielding portion.

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