Energy storage box and electrical device

Abstract

An energy storage box and an electrical device, relating to the technical field of batteries. The energy storage box of the present application comprises: a box body, having an accommodation cavity and a box opening in communication with the accommodation cavity; a cover plate assembly, comprising a cover plate body covered on the box opening; and a plurality of connection portions, which are arranged at intervals around the box opening, the cover plate being connected to the box body by means of the plurality of connection portions. A spacing dimension is formed between two adjacent connection portions, and the energy storage box has a plurality of spacing dimensions, at least one spacing dimension being different from at least another spacing dimension. The spacing dimensions between the connection portions configure vulnerable positions of connection between the cover plate body and the box body, such that when an explosion occurs inside the box body, the cover plate body can be first burst open from the vulnerable positions, and the gas inside the box body will be discharged from a gap caused by the bursting, thereby achieving the purpose of pressure relief and reducing the load on the connection portions at other positions, reducing the likelihood of the cover plate body being directly burst open and blown off, and improving safety of energy storage boxes.

Description

Energy storage box and electric equipment

[0001] The present application claims priority to the Chinese patent application No. 202421753514X, filed on July 23, 2024, and entitled "Energy storage box and electric equipment", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of batteries, and specifically relates to an energy storage box and an electric equipment. BACKGROUND

[0003] The application scenarios of electrochemical energy storage systems are often accompanied by frequent activities of personnel, and the safety thereof is particularly important. The energy storage box is used as a storage carrier for the batteries used in the electrochemical energy storage system. When the batteries are in an extreme situation such as thermal runaway, an explosion may occur inside the energy storage box, and the explosion pressure may lift the cover plate of the energy storage box, thereby causing a safety hazard. SUMMARY

[0004] The energy storage box provided by the embodiments of the present application aims to overcome the technical problem that the cover plate of the energy storage box flies out of the box body when an explosion occurs inside the energy storage box. Another object of the present application is to provide an electric equipment.

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of protection of the claims.

[0006] The energy storage box provided by the embodiments of the present application comprises:

[0007] a box body having a receiving cavity and a box opening communicating with the receiving cavity;

[0008] a cover plate assembly comprising a cover plate body arranged on the box opening;

[0009] a plurality of connecting portions arranged at intervals around the box opening, and the cover plate body is connected to the box body through the plurality of connecting portions;

[0010] The distance between two adjacent connecting portions has a spacing size, the energy storage box has a plurality of spacing sizes, and at least one spacing size is different in size from at least another spacing size.

[0011] In some embodiments, the box body comprises a first edge portion, a second edge portion, a third edge portion and a fourth edge portion arranged at the box opening and sequentially connected end to end, the first edge portion and the third edge portion extend along a first direction and are arranged at intervals in a 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;

[0012] The first direction and the second direction intersect.

[0013] 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 pitch size of the plurality of the connecting portions on the first edge portion is greater than the pitch size of the plurality of the connecting portions on the third edge portion.

[0014] In some embodiments, the second direction corresponds to a direction in which the third edge portion points to the first edge portion.

[0015] In the second direction, the pitch size of the plurality of the connecting portions on the second edge portion gradually increases, and / or the pitch size of the plurality of the connecting portions on the fourth edge portion gradually increases.

[0016] In some embodiments, the pitch size of the plurality of the connecting portions on the first edge portion is greater than the pitch size of the plurality of the connecting portions on the second edge portion, and / or the pitch size of the plurality of the connecting portions on the first edge portion is greater than the pitch size of the plurality of the connecting portions on the fourth edge portion.

[0017] In some embodiments, the energy storage box further comprises a lock catch assembly, and the lock catch assembly comprises:

[0018] A first clamping member connected to the third edge portion;

[0019] A second clamping member connected to the cover plate body and in clamping connection with the first clamping member.

[0020] In some embodiments, the third edge portion has a relief groove.

[0021] The first clamping member is arranged on a side of the third edge portion away from the cover plate body, and the first clamping member comprises:

[0022] A body connected to the third edge portion;

[0023] A clamping portion connected to the body and arranged in correspondence with the relief groove;

[0024] The second clamping member is connected to a side of the cover plate body facing the third edge portion and penetrates the relief groove, and the second clamping member is in clamping connection with the clamping portion.

[0025] In some embodiments, the first clamping member is arranged on a side of the third edge portion away from the cover plate body, and the first clamping member comprises:

[0026] A body connected to the third edge portion;

[0027] The buckle part is connected to the body and is in clasp connection with the second clasp part.

[0028] The support part is connected to the body and is attached to the outer side wall of the box.

[0029] In some embodiments, the first clasp part is arranged on the side of the third edge part away from the cover plate body, and at least one connecting part penetrates and connects the cover plate body, the third edge part, and the first clasp part.

[0030] In some embodiments, the cover plate assembly further comprises a flange part, which is arranged around the cover plate body and extends towards the box, and covers the joint between the cover plate body and the box.

[0031] Correspondingly, the electric equipment provided in the embodiments of the present application comprises the energy storage box.

[0032] The energy storage box in the embodiments of the present application connects the cover plate assembly and the box through multiple connecting parts, and the multiple connecting parts are arranged at intervals around the box opening and have different spacing sizes, that is, the spacing size at at least one position of the energy storage box is relatively large, so that the connection strength of the cover plate body at the position is relatively weak. When the cover plate body is subjected to the action of the explosion pressure, the cover plate body is more likely to be blown open and form a gap at the position with the relatively weak connection strength, so that the gas in the box is discharged from the gap to achieve the purpose of pressure relief, thereby reducing the possibility that the cover plate body is directly blown open and lifted by the explosion pressure, and thus reducing the occurrence of safety hazards.

[0033] Other aspects can be apparent after reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] FIG. 1 is a schematic diagram of the three-dimensional structure of the energy storage box provided in the embodiments of the present application;

[0036] FIG. 2 is a schematic diagram of the explosion of the energy storage box provided in the embodiments of the present application;

[0037] FIG. 3 is a schematic diagram of the position distribution of the connecting part provided in the embodiments of the present application;

[0038] FIG. 4 is a schematic diagram of another position distribution of the connecting part provided in the embodiments of the present application;

[0039] Fig. 5 is a distribution diagram of another position of the connecting part provided by the embodiment of the application;

[0040] Fig. 6 is a distribution diagram of another position of the connecting part provided by the embodiment of the application;

[0041] Fig. 7 is a distribution diagram of another position of the connecting part provided by the embodiment of the application;

[0042] Fig. 8 is a structure diagram of the lock assembly of the energy storage tank provided by the embodiment of the application;

[0043] Fig. 9 is an enlarged view of A in Fig. 8;

[0044] Fig. 10 is a three-dimensional structure diagram of the first clamping part provided by the embodiment of the application;

[0045] Fig. 11 is a three-dimensional structure diagram of the cover plate assembly provided by the embodiment of the application;

[0046] Fig. 12 is an enlarged view of B in Fig. 11;

[0047] Fig. 13 is a sectional view of the cooperation between the buckle part and the second clamping part provided by the embodiment of the application.

[0048] Reference signs: 1, tank body; 11, accommodating cavity; 12, tank opening; 13, first edge part; 14, second edge part; 15, third edge part; 151, avoiding groove; 16, fourth edge part; 2, cover plate assembly; 21, cover plate body; 22, flange part; 3, connecting part; 4, lock assembly; 41, first clamping part; 411, body; 4111, accommodating groove; 412, buckle part; 4121, first clamping plate; 4122, second clamping plate; 413, supporting part; 42, second clamping part; 421, third clamping plate; 422, fourth clamping plate; 4221, clamping groove. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0050] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, at least one of which can be one, two or more, unless otherwise explicitly specified.

[0051] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked X represents the first direction of the energy storage box, the arrow marked Y represents the second direction of the energy storage box, and the arrow marked Z represents 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 represent the structure and relative positional relationship of the components in the energy storage box. In actual application, the first direction X, the second direction Y and the third direction Z can change according to the different placement modes of the energy storage box. The axis refers to the center line or rotational axis of a component, device or workpiece.

[0052] As a prologue of the present application, when the lithium battery used in the electrochemical energy storage system occurs in an extreme situation such as thermal runaway, the internal gas generation rate increases, and most of the generated gas is flammable and explosive. Accumulation of too much gas can cause the energy storage box to explode and other dangerous situations.

[0053] Please refer to Figures 1, 2 and 3 together, the energy storage box of the embodiments of the present application includes a box body 1, a cover plate assembly 2 and a plurality of connecting parts 3. The box body 1 has a receiving cavity 11 and a box opening 12 communicating with the receiving cavity 11. The receiving cavity 11 can be used to store batteries, and the batteries are protected in the box body 1. The box opening 12 is used to put the batteries into the receiving cavity 11 or take the batteries out of the receiving cavity 11.

[0054] The cover plate assembly 2 includes a cover plate body 21, which covers the box opening 12 to cover the box opening 12, so that the receiving cavity 11 forms a relatively closed environment to protect the batteries inside.

[0055] The plurality of connecting parts 3 are distributed at intervals around the box opening 12. The cover plate body 21 is connected to the box body 1 through the plurality of connecting parts 3, that is, the plurality of connecting parts 3 are arranged around the box opening 12 once to fix the cover plate body 21 and the box body 1. There is a spacing size L between adjacent two connecting parts 3. The energy storage box has a plurality of spacing sizes L, at least one spacing size L is different in size from at least another spacing size L. That is, at least two spacing sizes L are different in size.

[0056] Please refer to Fig. 2, the connecting part 3 has an axis, which is marked as M in the figure, the interval size L is the distance between the axes M of two adjacent connecting parts 3, and the measuring tool can be selected from a vernier caliper, a digital caliper, a ruler, etc. Taking the vernier caliper as an example, when measuring the interval size L, the two measuring jaws of the vernier caliper are respectively aligned with the center points of the two connecting parts 3, the caliper is kept parallel to the two connecting parts 3, the scale line on the vernier caliper is observed, and the size value corresponding to the position of the measuring jaw is read, which is the interval size, denoted by L in the figure. The center point of the connecting part 3 is the midpoint of the end face of the connecting part 3 in the direction of the axis M. For example, if the end of the connecting part 3 is circular, the center point is the center of the circle. For example, if the end of the connecting part 3 is a regular polygon, the center point is the center of the circumscribed circle or the inscribed circle of the regular polygon. If the connecting part 3 is a regular polygon, the center point is the intersection of any two diagonal lines (from one vertex to another non-adjacent vertex) of the regular hexagon.

[0057] The energy storage tank has at least one position as a weak part where the cover plate body 21 is connected to the tank body 1, at which position, the interval size L of the two connecting parts 3 is larger than the interval size L between the connecting parts 3 adjacent thereto or away therefrom. The large interval size L means that the distribution density of the connecting parts 3 of the cover plate body 21 and the tank body 1 at this position is relatively small, so that the connection strength of the cover plate body 21 and the tank body 1 at this position is reduced compared to the positions where the distribution density of the connecting parts 3 is large.

[0058] On the one hand, when the internal pressure of the tank body 1 continuously increases, the part of the cover plate body 21 corresponding to the weak part will relatively easily deform and arch upward, or the part of the cover plate body 21 corresponding to the weak part will be broken by the pressure, or the part of the cover plate body 21 corresponding to the weak part will deform and pull the connecting part 3 to break, forming a gap between the cover plate body 21 and the tank body 1, so that the gas in the tank body 1 is discharged from the gap to relieve the pressure, so as to prevent the gas from continuously accumulating and exploding, and reduce the possibility of safety hazards.

[0059] On the other hand, when the internal pressure of the tank body 1 rapidly increases and the tank body 1 rapidly explodes, the part of the cover plate body 21 corresponding to the weak part is directly broken, and the gas in the tank body 1 is discharged from the broken gap, which plays a role in relieving the pressure and reducing the impact force of the explosion, so that the load on the connecting parts 3 at the remaining positions is relatively reduced, which is beneficial to reduce the possibility of the cover plate body 21 being directly broken and flying away, thereby improving the safety of the energy storage tank.

[0060] Please combine Figure 2 and Figure 4, in some embodiments, the energy storage tank has a first direction X and a second direction Y, and the first direction X and the second direction Y intersect. The tank body 1 includes a first edge portion 13, a second edge portion 14, a third edge portion 15 and a fourth edge portion 16 arranged at the tank opening 12 in sequence and connected in sequence, the first edge portion 13 and the third edge portion 15 extend along the first direction X and are arranged in sequence in the second direction Y, and the second edge portion 14 and the fourth edge portion 16 extend along the second direction Y and are arranged in sequence in the first direction X.

[0061] 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 connecting portions 3, the connecting portions 3 on the first edge portion 13 and the third edge portion 15 are arranged in sequence along the first direction X, and the connecting portions 3 on the second edge portion 14 and the fourth edge portion 16 are arranged in sequence along the second direction Y. The spacing size L of the plurality of connecting portions 3 on the first edge portion 13 is greater than the spacing size L of the plurality of connecting portions 3 on the third edge portion 15, that is, the distribution density of the connecting portions 3 on the first edge portion 13 is less than the distribution density of the connecting portions 3 on the third edge portion 15, or it can also be said that the number of connecting portions 3 on the first edge portion 13 is less than the number of connecting portions 3 on the third edge portion 15.

[0062] The connection strength of the first edge portion 13 and the tank body 1 is less than the connection strength of the third edge portion 15 and the tank body 1, and when the cover plate body 21 is subjected to pressure, it is easier to break between the first edge portion 13 and the cover plate body 21, thereby controlling the breaking position of the cover plate body 21, so that the gas in the tank body 1 can be discharged from the designed direction, thereby setting the direction of the weak position according to the arrangement of the objects around the energy storage tank, reducing the impact on the objects around the energy storage tank when discharging pressure, and improving safety.

[0063] Please combine Figure 2, Figure 5 and Figure 6, in some embodiments, the second direction Y corresponds to the direction of the third edge portion 15 pointing to the first edge portion 13, along the second direction Y, the spacing size L of the plurality of connecting portions 3 on the second edge portion 14 gradually increases, and / or the spacing size L of the plurality of connecting portions 3 on the fourth edge portion 16 gradually increases.

[0064] In the case where the spacing size L of the plurality of connecting portions 3 on the second edge portion 14 gradually increases, the connecting portions 3 between the cover plate body 21 and the first edge portion 13 are broken, and then the connecting portions 3 between the cover plate body 21 and the second edge portion 14 are broken one by one against the second direction Y, thereby increasing the gap area that can be formed after the cover plate body 21 is broken, thereby facilitating the speed of pressure relief.

[0065] In the case that the interval size L of the plurality of connecting portions 3 on the second edge portion 14 gradually increases and the interval size L of the plurality of connecting portions 3 on the fourth edge portion 16 gradually increases, when the connection between the cover plate body 21 and the box body 1 is broken by pressure, the breaking position starts from the first edge portion 13, and opens up along the second edge portion 14 and the fourth edge portion 16 to the third edge portion 15, forming the action of the cover plate body 21 being flipped over with the third edge portion 15 as the axis. In this process, since the interval size L of the plurality of connecting portions 3 on the second edge portion 14 and the fourth edge portion 16 gradually increases along the second direction Y, the pressure required for each connecting portion 3 to break during the process of the cover plate body 21 being flipped over against the second direction Y gradually increases, achieving gradual weakening of the pressure impact while releasing the pressure, so as to prevent the cover plate body 21 from being directly broken off from the box body 1 and causing damage to surrounding people or objects.

[0066] Please combine FIG. 2 and FIG. 7, in some embodiments, the interval size L of the plurality of connecting portions 3 on the first edge portion 13 is greater than the interval size L of the plurality of connecting portions 3 on the second edge portion 14, and / or the interval size L of the plurality of connecting portions 3 on the first edge portion 13 is greater than the interval size L of the plurality of connecting portions 3 on the fourth edge portion 16. The connection strength between the cover plate body 21 and the first edge portion 13 is less than the connection strength between the cover plate body 21 and the second edge portion 14, and / or the connection strength between the cover plate body 21 and the first edge portion 13 is less than the connection strength between the cover plate body 21 and the fourth edge portion 16, so that when the cover plate body 21 is subjected to pressure, it can be ensured that the cover plate body 21 is broken first between the cover plate body 21 and the first edge portion 13, thereby guiding the cover plate body 21 to open up against the second direction Y.

[0067] Please combine FIG. 8 and FIG. 9, in some embodiments, the energy storage box further comprises a lock catch assembly 4, the lock catch assembly 4 comprises a first clamping piece 41 and a second clamping piece 42, the first clamping piece 41 is connected with the third edge portion 15, the second clamping piece 42 is connected with the cover plate body 21, and the second clamping piece 42 is in clamping connection with the first clamping piece 41.

[0068] The connecting strength between the cover plate body 21 and the third edge portion 15 is greater than the connecting strength between the cover plate body 21 and the first edge portion 13, so the locking assembly 4 is arranged at the third edge portion 15, the second clamping piece 42 and the first clamping piece 41 are clamped and connected, which plays a reinforcing role on the connection between the cover plate body 21 and the third edge portion 15. When the pressure on the cover plate body 21 is too large, even if the connecting portions 3 on the first edge portion 13, the second edge portion 14 and the fourth edge portion 16 are all broken, the force on the cover plate body 21 is weakened after being absorbed by each connecting portion 3, and the clamped connection of the first clamping piece 41 and the second clamping piece 42 can hold the cover plate body 21, so as to prevent the cover plate body 21 from flying out of the box body 1, thereby protecting people or objects around the energy storage box and further reducing the possibility of safety hazards.

[0069] Please combine FIG. 2 and FIG. 9 to FIG. 13, in some embodiments, the third edge portion 15 has a avoiding slot 151, the first clamping piece 41 is arranged on the side of the third edge portion 15 away from the cover plate body 21, the first clamping piece 41 includes a body 411 and a buckle portion 412, the body 411 is connected with the third edge portion 15, and the buckle portion 412 is connected with the body 411 and is arranged correspondingly with the avoiding slot 151. The second clamping piece 42 is connected to the side of the cover plate body 21 facing the third edge portion 15, the second clamping piece 42 is arranged in the avoiding slot 151 and is clamped and connected with the buckle portion 412.

[0070] The second clamping piece 42 cooperates with the buckle portion 412 through the avoiding slot 151, so that the positions of the first connecting piece and the second connecting piece can be as close to the box body 1 as possible, without the need for cooperation from the side of the third edge portion 15 away from the box body 1, which is beneficial to reduce 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 keep the same width with the first edge portion 13 opposite to it, which is beneficial to save the occupied space of the box body 1 and facilitate the standardized processing of the box body 1.

[0071] Please refer to FIG. 9 to FIG. 13, in the embodiment of the present application, the number of buckling portions 412 can be multiple, the second clamping member 42 is correspondingly arranged with the buckling portions 412 to enhance the connection between each other. The energy storage box has a third direction Z, the third direction Z intersects with the first direction X and the second direction Y, the third direction Z corresponds to the direction of the box opening 12 pointing to the bottom of the box body 1; the buckling portion 412 includes a first clamping plate 4121 and a second clamping plate 4122, the body 411 has a displacement slot 4111, the first clamping plate 4121 is connected with the body 411 and located in the displacement slot 4111, the second clamping plate 4122 is connected at one 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 with the cover plate body 21, the fourth clamping plate 422 is connected at one end of the third clamping plate 421 and extends along the third direction Z, the fourth clamping plate 422 has a clamping slot 4221 penetratingly arranged, the second clamping plate 4122 passes through the clamping slot 4221 and is clamped with the fourth clamping plate 422. The first clamping plate 4121 and the second clamping plate 4122 are integrally formed, which can be processed and formed by bending the plate material, 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, which will not be repeated here.

[0072] Please combine FIG. 8 and FIG. 9, in some embodiments, the energy storage box has a third direction Z, the third direction Z intersects with the first direction X and the second direction Y, the third direction Z corresponds to the direction of the box opening 12 pointing to the bottom of the box body 1; the first clamping member 41 is arranged at one side of the third edge portion 15 away from the cover plate body 21, combined with FIG. 10, the first clamping member 41 includes a body 411, a buckling portion 412 and a supporting portion 413, the body 411 is connected with the third edge portion 15, the buckling portion 412 is connected with the body 411 and clamped with the second clamping member 42, the supporting portion 413 is connected with the body 411 and extends along the third direction Z, the supporting portion 413 is in close contact with the outer side wall of the box body 1. When the cover plate body 21 is broken, the buckling portion 412 is clamped with the second clamping member 42 to pull the cover plate body 21, when the third edge portion 15 is subjected to downward force due to the traction of the cover plate body 21, the supporting portion 413 is in abutment with the box body 1 and is subjected to the counter supporting force of the box body 1, which can share the load between the third edge portion 15 and the box body 1 to reduce the possibility of breaking of the third edge portion 15.

[0073] Please refer to FIG. 13, in some embodiments, the first clamping piece 41 is arranged on the third edge portion 15 away from the cover plate body 21, and the at least one connecting portion 3 penetrates and connects the cover plate body 21, the third edge portion 15 and the first clamping piece 41. During installation, the first clamping piece 41 is first connected with the second clamping piece 42, and then the connecting portion 3 penetrates the cover plate body 21, the third edge portion 15 and the first clamping piece 41 in sequence to realize the fixation of the three, which on the one hand can facilitate the pre-cooperation of the first clamping piece 41 and the second clamping piece 42, and on the other hand can make full use of each connecting portion 3, compared with the connection of the third edge portion 15 with the cover plate body 21 and the first clamping piece 41 respectively, the number of connecting portions 3 required can be saved.

[0074] Please refer to FIG. 13, in some embodiments, the connecting portion 3 includes a bolt and a nut, the bolt penetrates the cover plate body 21, the third edge portion 15 and the body 411 and is threadedly connected with the nut, and the cover plate body 21, the third edge portion 15 and the body 411 are locked and fixed by the bolt and the nut; correspondingly, the spacing size L between the adjacent two connecting portions 3 is the distance between the axes of the adjacent two bolts.

[0075] Please refer to FIG. 9 and FIG. 13, in some embodiments, the cover plate assembly 2 further includes a flanging portion 22, the flanging portion 22 surrounds the cover plate body 21 and is arranged extending towards the cabinet 1, and the flanging portion 22 covers the joint between the cover plate body 21 and the cabinet 1. When the cover plate body 21 and the cabinet 1 are broken to release pressure, the discharged gas is blocked by the flanging portion 22, so that the gas diffuses downward to reduce the direct contact of the gas with people and objects above or around the energy storage tank. In some embodiments, the flanging portion 22 is perpendicular to the cover plate body 21, and the two are integrally formed, which can be processed by a plate material through a flanging process.

[0076] Correspondingly, the electric equipment provided by the embodiments of the present application includes the energy storage tank of the above embodiments, and therefore, the electric equipment can have all the technical features and beneficial effects of the energy storage tank, which will not be described herein.

[0077] The energy storage tank and the electric equipment provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples; the above descriptions of the embodiments are only used to help understand the technical solutions and core ideas of the present application; those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage tank, wherein, The energy storage box comprises: a box body (1) having a receiving cavity (11) and a box opening (12) communicating with the receiving cavity (11); a cover plate assembly (2) comprising a cover plate body (21) covering the box opening (12); a plurality of connecting portions (3) arranged at intervals around the box opening (12), and the cover plate body (21) is connected to the box body (1) through the plurality of connecting portions (3); each two adjacent connecting portions (3) have a spacing size, and the energy storage box has a plurality of spacing sizes, at least one of which is different in size from at least one other spacing size.

2. The energy storage tank of claim 1, wherein, 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) arranged at the box opening (12) and sequentially connected end to end, the first edge portion (13) and the third edge portion (15) extend in a first direction and are arranged at intervals in a second direction, the second edge portion (14) and the fourth edge portion (16) extend in 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 connecting portions (3), and the spacing size of the plurality of connecting portions (3) on the first edge portion (13) is greater than the spacing size of the plurality of connecting portions (3) on the third edge portion (15).

3. The energy storage tank of claim 2, wherein, The second direction corresponds to the direction in which the third edge portion (15) points to the first edge portion (13); in the second direction, the spacing size of the plurality of connecting portions (3) on the second edge portion (14) gradually increases, and / or the spacing size of the plurality of connecting portions (3) on the fourth edge portion (16) gradually increases.

4. The energy storage tank of claim 2, wherein, The spacing size of the plurality of connecting portions (3) on the first edge portion (13) is greater than the spacing size of the plurality of connecting portions (3) on the second edge portion (14), and / or the spacing size of the plurality of connecting portions (3) on the first edge portion (13) is greater than the spacing size of the plurality of connecting portions (3) on the fourth edge portion (16).

5. The energy storage tank of claim 2, wherein, The energy storage box further comprises a lock catch assembly (4), and the lock catch assembly (4) comprises: a first clamping piece (41) connected to the third edge portion (15); a second clamping piece (42) connected to the cover plate body (21) and in clamping connection with the first clamping piece (41).

6. The energy storage tank of claim 5, wherein, The third edge portion (15) has an avoiding groove (151); The first clamping piece (41) is arranged on the side of the third edge portion (15) away from the cover plate body (21), and the first clamping piece (41) comprises: a body (411) connected to the third edge portion (15); a clamping buckle portion (412) connected to the body (411) and arranged correspondingly with the avoiding groove (151). The second clamping part (42) is connected to one side of the cover plate body (21) towards the third edge portion (15), and is arranged in the avoiding groove (151), and the second clamping part (42) is clamped and connected with the buckle portion (412).

7. The energy storage tank of claim 5, wherein, The first clamping part (41) is arranged on the side of the third edge portion (15) away from the cover plate body (21), and the first clamping part (41) comprises: a body (411) connected with the third edge portion (15); a buckle portion (412) connected with the body (411) and clamped and connected with the second clamping part (42); a supporting portion (413) connected with the body (411), and the supporting portion (413) is arranged on the outer side wall of the box (1).

8. The energy storage tank of any one of claims 5-7, wherein, The first clamping part (41) is arranged on the side of the third edge portion (15) away from the cover plate body (21), and at least one connecting portion (3) penetrates and connects the cover plate body (21), the third edge portion (15) and the first clamping part (41).

9. The energy storage tank of claim 1, wherein, The cover plate assembly (2) further comprises a flanging portion (22) arranged around the cover plate body (21) and extending towards the box (1), and the flanging portion (22) covers the joint between the cover plate body (21) and the box (1).

10. An electrical device, comprising: The energy storage box comprises the energy storage box according to any one of claims 1 to 9. The energy storage box comprises the energy storage box according to any one of claims 1 to 9.

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