Energy storage box and electric equipment

Abstract

The utility model discloses an energy storage box and electric equipment, and belongs to the technical field of batteries, and the energy storage box comprises a box body which is provided with a containing cavity and a box opening communicated with the containing cavity; the cover plate assembly comprises a cover plate body covering the box opening; the connecting parts are arranged around the box opening at intervals, and the cover plate is connected with the box body through the connecting parts; an interval size is formed between every two adjacent connecting parts, the energy storage box has a plurality of interval sizes, and at least one interval size is different from at least another interval size; the weak connection position of the cover plate body and the box body is arranged according to the distance between the connecting parts, so that when the interior of the box body explodes, the cover plate body can be firstly exploded at the weak position, gas in the box body is discharged from the exploded notch, the purpose of pressure relief is achieved, loads borne by the connecting parts at the other positions are reduced, and the service life of the box body is prolonged. The possibility that the cover plate body is directly exploded and lifted away is reduced, and the safety of the energy storage box is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to an energy storage box and electrical equipment. Background Art

[0002] The application scenarios of electrochemical energy storage systems are often accompanied by frequent human activities, so their safety is particularly important. The energy storage box is used to store the batteries used in the electrochemical energy storage system. When the battery encounters extreme conditions such as thermal runaway, it will explode inside the energy storage box. The explosion pressure may blow off the cover of the energy storage box, thus posing a safety hazard. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides an energy storage box, aiming to overcome the technical problem that the cover of the energy storage box will detach from the box body and fly out when an explosion occurs inside the energy storage box; another purpose of the present application is to provide an electrical device.

[0004] Technical solution: The energy storage box described in the embodiment of the present application includes:

[0005] A box body, comprising a containing cavity and a box opening communicating with the containing cavity;

[0006] A cover plate assembly, comprising a cover plate body covering the box opening;

[0007] A plurality of connection parts are arranged at intervals around the box opening, and the cover plate body is connected to the box body through the plurality of connection parts;

[0008] There is a spacing dimension between two adjacent connection parts, the energy storage box has a plurality of the spacing dimensions, and at least one of the spacing dimensions is different in size from at least another of the spacing dimensions.

[0009] In some embodiments, the box body includes a first edge portion, a second edge portion, a third edge portion, and a fourth edge portion which are arranged at the box opening and are sequentially connected end to end, the first edge portion and the third edge portion extend along the first direction and are arranged at intervals in the second direction, and the second edge portion and the fourth edge portion extend along the second direction and are arranged at intervals in the first direction;

[0010] The first direction and the second direction intersect;

[0011] The first edge portion, the second edge portion, the third edge portion and the fourth edge portion are respectively provided with a plurality of the connecting portions, and the spacing dimension of the plurality of the connecting portions on the first edge portion is greater than the spacing dimension of the plurality of the connecting portions on the third edge portion.

[0012] In some embodiments, the second direction corresponds to a direction in which the third edge portion points to the first edge portion;

[0013] Along the second direction, the spacing dimension of the plurality of connecting portions on the second edge portion gradually increases, and / or the spacing dimension of the plurality of connecting portions on the fourth edge portion gradually increases.

[0014] In some embodiments, the spacing dimension of the multiple connecting portions on the first edge portion is greater than the spacing dimension of the multiple connecting portions on the second edge portion, and / or the spacing dimension of the multiple connecting portions on the first edge portion is greater than the spacing dimension of the multiple connecting portions on the fourth edge portion.

[0015] In some embodiments, the energy storage box further includes a lock assembly, and the lock assembly includes:

[0016] A first clamping member connected to the third edge portion;

[0017] The second clamping member is connected to the cover plate body and is clamped and connected with the first clamping member.

[0018] In some embodiments, the third edge portion has an avoidance groove;

[0019] The first clamping member is disposed on a side of the third edge portion away from the cover body, and the first clamping member includes:

[0020] a body connected to the third edge portion;

[0021] A buckle portion, connected to the body and arranged corresponding to the avoidance groove;

[0022] The second clamping member is connected to a side of the cover body facing the third edge portion and is penetrated through the avoidance groove. The second clamping member is clamped and connected with the buckle portion.

[0023] In some embodiments, the first clamping member is disposed on a side of the third edge portion away from the cover body, and the first clamping member includes:

[0024] a body connected to the third edge portion;

[0025] A buckle portion, connected to the body and engaged with the second clamping member;

[0026] The support part is connected to the main body and is attached to the outer side wall of the box body.

[0027] In some embodiments, the first clamping member is disposed on a side of the third edge portion away from the cover body, and at least one of the connecting portions penetrates and connects the cover body, the third edge portion, and the first clamping member.

[0028] In some embodiments, the cover assembly further includes a flange portion, which is connected to the cover body and extends toward the box body, and the flange portion covers a joint between the cover body and the box body.

[0029] Correspondingly, an electrical equipment described in an embodiment of the present application includes the above-mentioned energy storage box.

[0030] Beneficial effect: The energy storage box of the embodiment of the present application connects the cover plate assembly to the box body through multiple connecting parts. The multiple connecting parts are arranged at intervals around the box opening and set with spacing dimensions. At least one spacing dimension is different from at least another spacing dimension, that is, there is at least one position of the energy storage box with a larger spacing dimension, so that the connection strength of the cover plate body at this position is relatively weak. When the cover plate body is subjected to explosion pressure, the cover plate body is more likely to be blown open and form a gap at the position where the connection strength is relatively weak, allowing the gas inside the box to be discharged from the gap, thereby achieving the purpose of pressure relief, reducing the possibility of the entire cover plate body being directly blown open and lifted off by the explosion pressure, thereby reducing the occurrence of safety hazards.

[0031] The electrical equipment of the embodiment of the present application includes the above-mentioned energy storage box, and thus can have all the technical features and beneficial effects of the above-mentioned energy storage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the three-dimensional structure of the energy storage box provided in an embodiment of the present application;

[0034] Figure 2 An exploded schematic diagram of an energy storage box provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the position distribution of the connection parts provided in the embodiment of the present application;

[0036] Figure 4 A schematic diagram of another distribution position of the connection part provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of another distribution position of the connection part provided in an embodiment of the present application;

[0038] Figure 6A schematic diagram of the distribution of another position of the connection part provided in the embodiment of the present application;

[0039] Figure 7 A schematic diagram of the distribution of another position of the connection part provided in the embodiment of the present application;

[0040] Figure 8 A schematic diagram of the structure of the locking assembly of the energy storage box provided in an embodiment of the present application;

[0041] Fig. 9 for Figure 8 A partial enlarged view of the middle A;

[0042] Fig.10 A schematic diagram of the three-dimensional structure of a first clamping member provided in an embodiment of the present application;

[0043] Fig.11 A schematic diagram of the three-dimensional structure of the cover plate assembly provided in an embodiment of the present application;

[0044] Fig.12 for Fig.11 A partial enlarged view of point B in the middle;

[0045] Fig.13 A cross-sectional view of the buckle portion and the second clip provided in the embodiment of the present application cooperating with each other;

[0046] Figure numerals: 1. box body; 11. accommodating cavity; 12. box opening; 13. first edge portion; 14. second edge portion; 15. third edge portion; 151. avoidance groove; 16. fourth edge portion; 2. cover assembly; 21. cover body; 22. flange portion; 3. connecting portion; 4. lock assembly; 41. first clip; 411. body; 4111. avoidance groove; 412. clip portion; 4121. first clip board; 4122. second clip board; 413. supporting portion; 42. second clip; 421. third clip board; 422. fourth clip board; 4221. clip slot. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more than two, and at least one means one, two or more than two, unless otherwise clearly and specifically defined.

[0049] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked with X indicates the first direction of the energy storage box, the arrow marked with Y indicates the second direction of the energy storage box, and the arrow marked with Z indicates the third direction of the energy storage box. The first direction X, the second direction Y, and the third direction Z are introduced to more clearly describe the structure and relative position relationship of each component in the energy storage box. In actual applications, the first direction X, the second direction Y, and the third direction Z may change according to the different placement methods of the energy storage box. An axis refers to a center line or rotation axis along a component, device, or workpiece.

[0050] As a preface to this application, when the lithium batteries used in electrochemical energy storage systems are in extreme conditions such as thermal runaway, the internal gas generation rate increases, and most of the generated gases are flammable and explosive. Excessive accumulation may cause dangerous situations such as explosion of the energy storage box.

[0051] Please combine Figure 1 , Figure 2 and Figure 3 The energy storage box of the embodiment of the present application includes a box body 1, a cover assembly 2 and multiple connecting parts 3. The box body 1 has a accommodating cavity 11 and a box opening 12 connected to the accommodating cavity 11. The accommodating cavity 11 can be used to store batteries and protect the batteries in the box body 1. The box opening 12 is used to put the batteries into the accommodating cavity 11 or take the batteries out of the accommodating cavity 11.

[0052] The cover plate assembly 2 includes a cover plate body 21 , which is disposed on the box opening 12 to cover the box opening 12 , so that the accommodating cavity 11 forms a relatively closed environment to protect the batteries therein.

[0053] A plurality of connection parts 3 are spaced around the box opening 12, and the cover body 21 is connected to the box body 1 through the plurality of connection parts 3, that is, the plurality of connection parts 3 are arranged around the box opening 12 to fix the cover body 21 and the box body 1. There is a spacing dimension L between two adjacent connection parts 3, and the energy storage box has a plurality of spacing dimensions L, and at least one spacing dimension L is different from at least another spacing dimension L.

[0054] Please refer to Figure 2, the connection part 3 has an axis, which is marked as M in the attached figure. The spacing dimension L is the distance between the axes M of two adjacent connection parts 3. The measuring tools can be vernier calipers, digital calipers, rulers and other measuring tools. Taking the vernier caliper as an example, when measuring the spacing dimension L, the two measuring claws of the vernier caliper are respectively aligned with the center points of the two connection parts 3, the caliper is kept parallel to the two connection parts 3, the scale lines on the vernier caliper are observed, and the dimension value corresponding to the position of the measuring claws is read, which is the spacing dimension, which is represented by L in the attached figure. The center point of the connection part 3 is the midpoint of the end face of one end of the connection part 3 along the axis M direction. If the end of the connection part 3 is circular, the center point is the center of the circle. If the connection part 3 is a regular polygon, the center point is the intersection of any two diagonals of the regular hexagon (from one vertex to another non-adjacent vertex).

[0055] The energy storage box has at least one position that serves as a weak part in the connection between the cover body 21 and the box body 1. At this position, the spacing dimension L between the two connecting parts 3 is larger than the spacing dimension L between the connecting parts 3 adjacent to it or far away from it. The large spacing dimension L means that the distribution density of the connecting parts 3 between the cover body 21 and the box body 1 at this position is relatively small, so that the connection strength between the cover body 21 and the box body 1 is reduced compared to the position where the distribution density of the connecting parts 3 is larger.

[0056] On the one hand, when the internal pressure of the box body 1 continues to increase, the portion of the cover body 21 corresponding to the weak part will be relatively easy to deform and arch upward, or the portion of the cover body 21 corresponding to the weak part will be broken by pressure, or the portion of the cover body 21 corresponding to the weak part will be deformed and pull the connecting part 3 to break, forming a gap between the cover body 21 and the box body 1, so that the gas inside the box body 1 is discharged from the gap to release the pressure, so as to prevent the gas from accumulating continuously and causing an explosion, thereby reducing the possibility of safety hazards.

[0057] On the other hand, when the internal pressure of the box body 1 increases rapidly and the box body 1 explodes rapidly, the portion of the cover body 21 corresponding to the weak part is directly exploded, and the gas inside the box body 1 is discharged from the exploded hole, which plays a role in pressure relief and reducing the impact force of the explosion, so that the load on the connection part 3 at the remaining position is relatively reduced, which is beneficial to reduce the possibility of the cover body 21 being directly exploded and blown away, thereby improving the safety of the energy storage box.

[0058] Please combine Figure 2 and Figure 4In some embodiments, the energy storage box has a first direction X and a second direction Y, and the first direction X and the second direction Y intersect. The box body 1 includes a first edge portion 13, a second edge portion 14, a third edge portion 15 and a fourth edge portion 16 which are arranged at the box opening 12 and are sequentially connected end to end. The first edge portion 13 and the third edge portion 15 extend along the first direction X and are arranged at intervals in the second direction Y. The second edge portion 14 and the fourth edge portion 16 extend along the second direction Y and are arranged at intervals in the first direction X.

[0059] The first edge portion 13, the second edge portion 14, the third edge portion 15 and the fourth edge portion 16 are respectively provided with a plurality of connection portions 3, the connection portions 3 on the first edge portion 13 and the third edge portion 15 are arranged at intervals along the first direction X, and the connection portions 3 on the second edge portion 14 and the fourth edge portion 16 are arranged at intervals along the second direction Y. The spacing dimension L of the plurality of connection portions 3 on the first edge portion 13 is greater than the spacing dimension L of the plurality of connection portions 3 on the third edge portion 15, that is, the distribution density of the connection portions 3 on the first edge portion 13 is less than the distribution density of the connection portions 3 on the third edge portion 15, or in other words, the number of the connection portions 3 on the first edge portion 13 is less than the number of the connection portions 3 on the third edge portion 15.

[0060] The connection strength between the first edge portion 13 and the box body 1 is less than the connection strength between the third edge portion 15 and the box body 1. When the cover body 21 is subjected to pressure, it is easier to break apart from the first edge portion 13, thereby controlling the breaking position of the cover body 21, so that the gas inside the box body 1 can be discharged from the designed direction, thereby setting the orientation of the weak position according to the arrangement of objects around the energy storage box, reducing the impact of the energy storage box on surrounding objects when the pressure is discharged, and improving safety.

[0061] Please combine Figure 2 , Figure 5 and Figure 6 In some embodiments, the second direction Y corresponds to the direction in which the third edge portion 15 points to the first edge portion 13. Along the second direction Y, the spacing dimension L of the multiple connection portions 3 on the second edge portion 14 gradually increases, and / or the spacing dimension L of the multiple connection portions 3 on the fourth edge portion 16 gradually increases.

[0062] When the spacing dimension L of the multiple connection parts 3 on the second edge part 14 gradually increases, the connection part 3 between the cover body 21 and the first edge part 13 is broken, and then the connection part 3 between the cover body 21 and the second edge part 14 is broken one by one against the second direction Y, thereby increasing the notch area that can be formed after the cover body 21 is broken, which is conducive to accelerating the pressure relief speed.

[0063] In the case where the spacing dimension L of the multiple connection parts 3 on the second edge part 14 gradually increases and the spacing dimension L of the multiple connection parts 3 on the fourth edge part 16 gradually increases, when the connection between the cover body 21 and the box body 1 is broken by pressure, the breaking position starts from the first edge part 13 and opens along the second edge part 14 and the fourth edge part 16 to the third edge part 15, forming an action of the cover body 21 flipping with the third edge part 15 as the axis. In this process, since the spacing dimension L of the multiple connection parts 3 on the second edge part 14 and the fourth edge part 16 gradually increases along the second direction Y, the pressure required to disconnect each connection part 3 gradually increases during the flipping of the cover body 21 against the second direction Y, so as to achieve the gradual weakening of the pressure shock while releasing the pressure, so as to prevent the cover body 21 from being directly broken and separated from the box body 1, causing damage to the surrounding people or objects.

[0064] Please combine Figure 2 and Figure 7 In some embodiments, the spacing dimension L of the multiple connection parts 3 on the first edge portion 13 is greater than the spacing dimension L of the multiple connection parts 3 on the second edge portion 14, and / or, the spacing dimension L of the multiple connection parts 3 on the first edge portion 13 is greater than the spacing dimension L of the multiple connection parts 3 on the fourth edge portion 16. The connection strength between the cover body 21 and the first edge portion 13 is less than that between the cover body 21 and the second edge portion 14, and / or, the connection strength between the cover body 21 and the fourth edge portion 16, so that when the cover body 21 is subjected to pressure, it can be ensured that it is first broken from between the cover body 21 and the first edge portion 13, thereby guiding the cover body 21 to be opened against the second direction Y.

[0065] Please combine Figure 8 and Fig. 9 In some embodiments, the energy storage box also includes a locking assembly 4, which includes a first clamping member 41 and a second clamping member 42, wherein the first clamping member 41 is connected to the third edge portion 15, the second clamping member 42 is connected to the cover body 21, and the second clamping member 42 is clamped and connected to the first clamping member 41.

[0066] The connection strength between the cover body 21 and the third edge portion 15 is greater than the connection strength between the cover body 21 and the first edge portion 13. Therefore, the locking assembly 4 is set at the third edge portion 15, and the second clip 42 is snap-connected with the first clip 41 to reinforce the connection between the cover body 21 and the third edge portion 15. When the pressure on the cover body 21 is too large, even if the connecting parts 3 on the first edge portion 13, the second edge portion 14 and the fourth edge portion 16 are broken, the force applied to the cover body 21 is weakened after being absorbed by each connecting part 3. The snap connection between the first clip 41 and the second clip 42 can pull the cover body 21 to prevent the cover body 21 from detaching from the box body 1 and flying out, thereby protecting people or objects around the energy storage box and further reducing the possibility of safety hazards.

[0067] Please combine Figure 2 and Figures 9 to 13 In some embodiments, the third edge portion 15 has an avoidance groove 151, the first clamping member 41 is disposed on a side of the third edge portion 15 away from the cover body 21, the first clamping member 41 includes a body 411 and a buckle portion 412, the body 411 is connected to the third edge portion 15, the buckle portion 412 is connected to the body 411, and is disposed corresponding to the avoidance groove 151. The second clamping member 42 is connected to a side of the cover body 21 facing the third edge portion 15, the second clamping member 42 is disposed through the avoidance groove 151, and is engaged and connected with the buckle portion 412.

[0068] The second clamping member 42 cooperates with the buckle portion 412 through the avoidance groove 151, so that the positions of the first connecting member and the second connecting member can be as close to the box body 1 as possible without the need to cooperate from the side of the third edge portion 15 away from the box body 1, which is beneficial to reducing the extension width of the third edge portion 15 in the direction away from the box body 1, so that the third edge portion 15 can maintain the same width as the first edge portion 13 opposite to it, which is beneficial to saving the occupied space of the box body 1 and facilitating the standardized processing of the box body 1.

[0069] Please refer to Figures 9 to 13In the embodiment of the present application, the number of the buckle parts 412 can be multiple, and the second clip 42 is correspondingly arranged with the buckle parts 412 to enhance the connection between them. The energy storage box has a third direction Z, which intersects with both the first direction X and the second direction Y. The third direction Z corresponds to the direction in which the box opening 12 points to the bottom of the box body 1; the buckle part 412 includes a first clamping plate 4121 and a second clamping plate 4122, and the body 411 has a clearance groove 4111. The first clamping plate 4121 is connected to the body 411 and is located in the clearance groove 4111. The second clamping plate 4122 is connected to the end of the first clamping plate 4121 away from the box body 1 and extends along the third direction Z. The second clamping member 42 includes a third clamping plate 421 and a fourth clamping plate 422. The third clamping plate 421 is connected to the cover body 21. The fourth clamping plate 422 is connected to one end of the third clamping plate 421 and extends along the third direction Z. The fourth clamping plate 422 has a through-set clamping slot 4221. The second clamping plate 4122 passes through the clamping slot 4221 and is engaged with the fourth clamping plate 422. The first clamping plate 4121 and the second clamping plate 4122 are integrally formed and can be formed by plate bending. The structures of the third clamping plate 421 and the fourth clamping plate 422 are the same as those of the first clamping plate 4121 and the second clamping plate 4122, and are not described in detail here.

[0070] Please combine Figure 8 and Fig. 9 In some embodiments, the energy storage box has a third direction Z, which intersects with both the first direction X and the second direction Y, and the third direction Z corresponds to the direction in which the box opening 12 points to the bottom of the box body 1; the first clamping member 41 is arranged on the side of the third edge portion 15 away from the cover body 21, and the first clamping member 41 includes a body 411, a buckle portion 412 and a support portion 413, the body 411 is connected to the third edge portion 15, the buckle portion 412 is connected to the body 411, and is engaged with the second clamping member 42, the support portion 413 is connected to the body 411, and extends along the third direction Z, and the support portion 413 is in contact with the outer wall of the box body 1. When the cover body 21 is broken, the buckle portion 412 is engaged with the second clip 42 to pull the cover body 21. When the third edge portion 15 is subjected to a downward force due to the traction of the cover body 21, the support portion 413 is against the box body 1 and is subjected to the reverse support force of the box body 1. The load between the third edge portion 15 and the box body 1 can be shared to reduce the possibility of the third edge portion 15 breaking.

[0071] Please refer to Fig.13In some embodiments, the first clamping member 41 is disposed on the side of the third edge portion 15 away from the cover plate, and at least one connecting portion 3 penetrates and connects the cover plate, the third edge portion 15, and the first clamping member 41. During installation, the first clamping member 41 is firstly engaged and connected with the second clamping member 42, and then the connecting portion 3 sequentially penetrates the cover plate body 21, the third edge portion 15, and the first clamping member 41 to achieve the fixation of the three. On the one hand, it is convenient to pre-match the first clamping member 41 with the second clamping member 42, and on the other hand, each connecting portion 3 can be fully utilized. Compared with the third edge portion 15 being connected to the cover plate body 21 and the first clamping member 41 respectively, the number of required connecting portions 3 can be saved.

[0072] Please refer to Fig.13 In some embodiments, the connection portion 3 includes bolts and nuts, and the bolts pass through the cover body 21, the third edge portion 15 and the body 411 and are threadedly connected with the nuts, and the cover body 21, the third edge portion 15 and the body 411 are locked and fixed by the bolts and nuts; accordingly, the spacing dimension L between two adjacent connection portions 3 is the distance between the axes of two adjacent bolts.

[0073] Please combine Fig. 9 and Fig.13 In some embodiments, the cover assembly 2 further includes a flange portion 22, which is connected around the cover body 21 and extends toward the box body 1, and covers the joint between the cover body 21 and the box body 1. When the cover body 21 and the box body 1 are broken open for pressure relief, the exhausted gas is blocked by the flange portion 22, so that the gas diffuses downward to reduce direct contact of the gas with people and objects above or around the energy storage box. In some embodiments, the flange portion 22 is perpendicular to the cover body 21, and the two are integrally formed, and can be formed by a plate through a stamping and flanging process.

[0074] Correspondingly, an electrical device provided in an embodiment of the present application includes the energy storage box of the above embodiment, so the electrical device can have all the technical features and beneficial effects of the above energy storage box, which will not be repeated here.

[0075] The energy storage box and electrical equipment provided in the embodiments of the present application are introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An energy storage box, characterized in that: include: A box body (1) having a containing cavity (11) and a box opening (12) communicating with the containing cavity (11); A cover plate assembly (2) comprising a cover plate body (21) which covers the box opening (12); A plurality of connection parts (3) are arranged at intervals around the box opening (12), and the cover plate body (21) is connected to the box body (1) via the plurality of connection parts (3); There is a spacing dimension between two adjacent connection parts (3), the energy storage box has a plurality of the spacing dimensions, and at least one of the spacing dimensions is different in size from at least another of the spacing dimensions.

2. The energy storage box according to claim 1, characterized in that: The box body (1) comprises a first edge portion (13), a second edge portion (14), a third edge portion (15) and a fourth edge portion (16) which are arranged at the box opening (12) and are connected end to end in sequence, the first edge portion (13) and the third edge portion (15) extend along a first direction and are arranged at intervals in a second direction, and the second edge portion (14) and the fourth edge portion (16) extend along the second direction and are arranged at intervals in the first direction; The first direction and the second direction intersect; The first edge portion (13), the second edge portion (14), the third edge portion (15) and the fourth edge portion (16) are respectively provided with a plurality of the connecting portions (3), and the spacing dimension of the plurality of the connecting portions (3) on the first edge portion (13) is greater than the spacing dimension of the plurality of the connecting portions (3) on the third edge portion (15).

3. The energy storage box according to claim 2, characterized in that: The second direction corresponds to the direction in which the third edge portion (15) points toward the first edge portion (13); Along the second direction, the spacing dimension of the plurality of connecting portions (3) on the second edge portion (14) gradually increases, and / or the spacing dimension of the plurality of connecting portions (3) on the fourth edge portion (16) gradually increases.

4. The energy storage box according to claim 2, characterized in that: The spacing dimension of the multiple connecting portions (3) on the first edge portion (13) is greater than the spacing dimension of the multiple connecting portions (3) on the second edge portion (14), and / or the spacing dimension of the multiple connecting portions (3) on the first edge portion (13) is greater than the spacing dimension of the multiple connecting portions (3) on the fourth edge portion (16).

5. The energy storage box according to claim 2, characterized in that: The energy storage box further comprises a locking assembly (4), wherein the locking assembly (4) comprises: A first clamping member (41) connected to the third edge portion (15); The second clamping member (42) is connected to the cover plate body (21) and is clamped and connected with the first clamping member (41).

6. The energy storage box according to claim 5, characterized in that: The third edge portion (15) has an avoidance groove (151); The first clamping member (41) is arranged on a side of the third edge portion (15) away from the cover plate body (21), and the first clamping member (41) comprises: A body (411) connected to the third edge portion (15); A buckle portion (412) connected to the body (411) and arranged corresponding to the avoidance groove (151); The second clamping member (42) is connected to a side of the cover plate body (21) facing the third edge portion (15) and is inserted into the avoidance groove (151). The second clamping member (42) is clamped and connected to the buckle portion (412).

7. The energy storage box according to claim 5, characterized in that: The first clamping member (41) is arranged on a side of the third edge portion (15) away from the cover plate body (21), and the first clamping member (41) comprises: A body (411) connected to the third edge portion (15); A buckle portion (412) is connected to the body (411) and is engaged with the second clamping member (42); The support portion (413) is connected to the main body (411), and the support portion (413) is attached to the outer wall of the box body (1).

8. The energy storage box according to any one of claims 5 to 7, characterized in that: The first clamping member (41) is arranged on a side of the third edge portion (15) away from the cover body (21), and at least one of the connecting portions (3) penetrates and connects the cover body (21), the third edge portion (15) and the first clamping member (41).

9. The energy storage box according to claim 1, characterized in that: The cover plate assembly (2) further comprises a flange portion (22), wherein the flange portion (22) is connected around the cover plate body (21) and extends toward the box body (1), and the flange portion (22) covers a joint between the cover plate body (21) and the box body (1).

10. An electrical device, characterized in that: An energy storage box comprising any one of claims 1 to 9.

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