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 an opening communicated with the containing cavity; the cover plate is connected to the box body and covers the opening; the pull buckle assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is connected to the box body, the second connecting piece is connected to the cover plate, and the first connecting piece and the second connecting piece are connected in a limiting mode. After the cover plate covers and seals the opening and is normally connected with the box body, the cover plate and the box body are further connected through the first connecting piece and the second connecting piece which are in mutual limiting connection, the firmness of connection of the cover plate and the box body is improved, the situation that the cover plate is separated from the box body and flies out when explosion occurs in the energy storage box is avoided, and the safety of the energy storage box is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to an energy storage box and an electric device. BACKGROUND

[0002] The safety of the energy storage box is particularly important as the box for storing energy storage objects such as batteries. During multiple cycles of use, the batteries may experience extreme conditions such as thermal runaway, which may cause an explosion inside the energy storage box. If the explosion pressure is too large, the cover plate of the energy storage box may be separated from the box body and fly out, reducing the safety. CONTENT OF THE UTILITY MODEL

[0003] The application aims to overcome the technical problem that the cover plate of the energy storage box may fly out when an explosion occurs inside the energy storage box. Another object of the application is to provide an electric device.

[0004] TECHNICAL SCHEME The energy storage box provided by the application comprises:

[0005] a box body having a receiving cavity and an opening in communication with the receiving cavity;

[0006] a cover plate connected to the box body and covering the opening;

[0007] a pull buckle assembly comprising a first connecting piece and a second connecting piece, the first connecting piece being connected to the box body, the second connecting piece being connected to the cover plate, and the first connecting piece being limitingly connected to the second connecting piece.

[0008] In some embodiments, the first connecting piece and the second connecting piece are limitingly connected by clamping, or the second connecting piece has a displacement allowance relative to the first connecting piece in the thickness direction of the box body.

[0009] In some embodiments, the first connecting piece comprises a protruding portion and a body, the body being connected to the box body, and the protruding portion being protrudingly arranged on the side of the body away from the box body; the second connecting piece has a connecting hole, the protruding portion is clampedly connected to the connecting hole, or the protruding portion is embedded in the connecting hole, and the side of the protruding portion away from the cover plate is spaced apart from the inner wall of the connecting hole in the thickness direction of the box body.

[0010] In some embodiments, the cover plate comprises a plate body and an edge piece connected to the plate body, the plate body covering the opening, and the edge piece being arranged around the outer periphery of the plate body; the second connecting piece is connected to the edge piece.

[0011] In some embodiments, the second connecting piece comprises:

[0012] A mating part is located on the outside of the housing, and the mating part is limitedly connected to the first connecting member;

[0013] A bent portion is located between the edge member and the mating portion, and the bent portion is connected to both the edge member and the mating portion.

[0014] In some embodiments, the bent portion has a first hole along the length direction of the box and / or the width direction of the box, and the edge member has a second hole corresponding to the first hole;

[0015] The energy storage tank also includes:

[0016] A fastener, which passes through the first hole and the second hole to connect the bent portion and the edge member.

[0017] In some embodiments, the housing includes an outer shell and a connecting flange disposed circumferentially along the outer shell, the connecting flange being connected to the edge member and / or the plate.

[0018] In some embodiments, the edge member has at least one notch that extends to the junction of the edge member and the plate.

[0019] In some embodiments, the plate body includes a main body portion and a thinning portion connected to each other. The main body portion is connected to the box body. Along the thickness direction of the box body, the thinning portion has a maximum dimension L1, and the main body portion has a maximum dimension L2, satisfying L1 < L2.

[0020] In some embodiments, the body portion includes:

[0021] A first body and a second body are both connected to the housing. The thinning portion is located between the first body and the second body to separate the first body and the second body. The thinning portion is connected to the first body and the second body respectively.

[0022] In some embodiments, the main body and the thinned portion are an integral structure.

[0023] An electrical device comprising the energy storage box described in any one of the above-mentioned methods.

[0024] Beneficial effects: the energy storage box of the embodiment of the present application comprises: a box body having a containing cavity and an opening communicating with the containing cavity; a cover plate connected to the box body and covering the opening; a pull buckle assembly comprising a first connecting piece and a second connecting piece, the first connecting piece being connected to the box body, the second connecting piece being connected to the cover plate, and the first connecting piece and the second connecting piece being limitingly connected. After the cover plate covers and seals the opening and is normally connected with the box body, the cover plate and the box body are further connected through the first connecting piece and the second connecting piece which are limitingly connected with each other, the firmness of the connection between the two is improved, the cover plate is prevented from flying out of the box body when an explosion occurs in the energy storage box, and the safety of the energy storage box is improved.

[0025] The embodiment of the present application provides a kind of electric equipment, including the energy storage box described above, the electric equipment has all the technical features and beneficial effects of the energy storage box described above, here no more redundant description. BRIEF DESCRIPTION OF DRAWINGS

[0026] 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 as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0027] Figure 1 The energy storage box provided by the embodiment of the present application is shown in the perspective structure diagram.

[0028] Figure 2 The energy storage box provided by the embodiment of the present application is shown in the perspective structure diagram. Figure 1 The local enlarged view of area A in the above figure is shown.

[0029] Figure 3 The energy storage box provided by the embodiment of the present application is shown in the cross-sectional structure diagram.

[0030] Figure 4 The energy storage box provided by the embodiment of the present application is shown in the perspective structure diagram. Figure 3 The local enlarged view of area B in the above figure is shown.

[0031] Figure 5 The energy storage box provided by the embodiment of the present application is shown in the perspective structure diagram.

[0032] Figure 6 The cover plate provided by the embodiment of the present application is shown in the perspective structure diagram.

[0033] Figure 7 The cover plate provided by the embodiment of the present application is shown in the perspective structure diagram.

[0034] Figure 8 The cover plate provided by the embodiment of the present application is shown in another perspective structure diagram.

[0035] Figure 9 A side view of a cover plate with a thinning portion provided by an embodiment of the present application is shown in FIG. 1;

[0036] Figure 10 A side view of a cover plate with a thinning portion provided by an embodiment of the present application is shown in FIG. 1; Figure 9 A partial enlarged view of the C region in FIG. 1;

[0037] Reference signs: 10 - box body; 11 - accommodating cavity; 12 - opening; 13 - shell; 14 - connecting flange; 20 - cover plate; 21 - plate body; 211 - main body portion; 2111 - first main body; 2112 - second main body; 212 - thinning portion; 22 - edge piece; 221 - second hole; 222 - notch; 30 - pull buckle assembly; 31 - first connecting piece; 311 - protruding portion; 312 - body; 32 - second connecting piece; 321 - connecting hole; 322 - fitting portion; 323 - bent portion; 3231 - first hole; 40 - fixing piece; X - length direction; Y - width direction; Z - thickness direction. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, at least one of which can be one, two or more, unless otherwise specifically limited.

[0040] As an introduction to the embodiments of the present application, a kind of energy storage box is introduced, and the application scene of energy storage box is often accompanied by frequent activities of personnel, and there can be other important devices and equipment around, and its safety is particularly important. The battery inside the energy storage box increases the generation rate of internal gas in the extreme case such as thermal runaway, and most of the generated gas is flammable and explosive, and too much accumulation can cause dangerous situations such as explosion of energy storage box body, and too large explosion pressure can make the cover plate of the energy storage box fly out of the box body, hurt the surrounding workers, or damage the surrounding devices and equipment, and reduce safety.

[0041] Therefore, the embodiments of the present application provide an energy storage box to overcome at least one of the above technical problems.

[0042] Please refer to Figure 1 , Figure 2 and Figure 3 In the embodiments of the present application, the energy storage box includes a box body 10, a cover plate 20 and a pull buckle assembly 30. The box body 10 has a receiving cavity 11, and the internal space can be used to store batteries or other energy storage devices. The box body 10 also includes an opening 12 that communicates with the receiving cavity 11. This opening 12 can be used to place and remove batteries or other energy storage devices, making it convenient to maintain and manage the devices inside the cavity. The box body 10 is an important component of the energy storage box, and its main function is to store and protect the internal structure, preventing external environmental factors from causing damage or interference to the equipment. The cover plate 20 is a component connected to the box body 10 and covers the opening 12 above, serving to cover and protect the receiving cavity 11. At this time, the receiving cavity between the cover plate 20 and the box body 10 is a sealed area, which can prevent dust, moisture and other external factors from entering the energy storage box, thereby ensuring the stability and safety of the internal structure. The cover plate 20 is generally connected to the box body 10 by bolts, screws or other structures. This structure can open or close the cover plate 20 as needed, making it convenient for users to operate or maintain the internal storage structure of the energy storage box.

[0043] The pull buckle assembly 30 comprises a first connecting piece 31 and a second connecting piece 32, the first connecting piece 31 is connected to the box body 10, and the second connecting piece 32 is connected to the cover plate 20, and the first connecting piece 31 is limitingly connected with the second connecting piece 32. The pull buckle assembly 30 can be provided with one or more. The main part of the pull buckle assembly 30 can be arranged inside or outside the box body 10. If it is arranged inside the box body 10, at least one of the first connecting piece 31 and the second connecting piece 32 can be connected to the cover plate 20 or the box body 10 by a bolt, and the head of the bolt is exposed outside the energy storage box, which facilitates the worker to disassemble the bolt from the outside, so as to separate the cover plate 20 or the box body 10. If it is arranged outside the box body 10, at least one of the first connecting piece 31 and the second connecting piece 32 can be provided as an elastic structure. At this time, the first connecting piece 31 and the second connecting piece 32 can be separated by a certain deformation, without the need to disassemble one of the two; the first connecting piece 31 and the second connecting piece 32 can also be rigid structures, at this time, one of the two needs to be completely disassembled from the box body 10 or the cover plate 20, so that the first connecting piece 31 and the second connecting piece 32 can be in a state of disconnection, so that the box body 10 and the cover plate 20 are separated. Even if the explosion occurs inside the energy storage box, the connecting structure (the original connecting structure between the cover plate 20 and the box body 10 can weaken the explosion pressure, and at the same time, the gap between the cover plate 20 and the box body 10 can also release part of the gas, reducing the pressure) such as a bolt or a screw between the cover plate 20 and the box body 10 is damaged, the limiting effect of the first connecting piece 31 on the second connecting piece 32 can limit the cover plate 20 from separating from the box body 10, ensuring that the two are always connected, which can avoid the situation that the cover plate 20 flies out of the box body 10 when the explosion pressure in the energy storage box is too large, and also avoids causing harm to the surrounding workers and damaging other equipment around, thereby improving the safety during use of the energy storage box.

[0044] Please refer to Figure 1 , Figure 2 and Figure 3 In the embodiment of the present application, the first connecting piece 31 and the second connecting piece 32 are limitingly connected by clamping, or the second connecting piece 32 has a displacement allowance relative to the first connecting piece 31 along the thickness direction Z of the box body 10. It can be understood that the first connecting piece 31 and the second connecting piece 32 can be clamped and connected, and the connection between the two can be in close contact, which can further connect the box body 10 and the cover plate 20, so that the box body 10 and the cover plate 20 can be more firmly connected together. During the explosion relief of the energy storage box, the first connecting piece 31 plays a certain restraining role on the cover plate 20 through the second connecting piece 32, preventing the cover plate 20 from flying out due to excessive explosion pressure. Since the first connecting piece 31 and the second connecting piece 32 are tightly clamped, they will not move relative to each other during the explosion relief process, ensuring the limiting effect.

[0045] Alternatively, when the first connecting piece 31 limits the second connecting piece 32, the second connecting piece 32 can also have a certain displacement allowance relative to the first connecting piece 31 in the thickness direction Z of the box body 10, that is, when the energy storage box is in explosion relief, the cover plate 20 can drive the second connecting piece 32 to move in the thickness direction Z to a certain extent until the corresponding parts of the second connecting piece 32 and the first connecting piece 31 are in contact, and the first connecting piece 31 limits the second connecting piece 32 to continue to move. By setting a certain displacement allowance between the two, a certain buffering effect can be achieved on the second connecting piece 32, reducing the acting force of the second connecting piece 32 on the first connecting piece 31; at the same time, since the two do not need to be connected in close fit, the machining precision of the first connecting piece 31 and the second connecting piece 32 can be reduced, the machining difficulty is also reduced, and the machining efficiency of the structure is improved.

[0046] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments, the first connecting piece 31 comprises a protruding part 311 and a body 312, the body 312 is connected to the box body 10, the protruding part 311 is protrudingly arranged on the side of the body 312 away from the box body 10, and the second connecting piece 32 has a connecting hole 321. The protruding part 311 is connected with the connecting hole 321 in a clamping manner; or, the protruding part 311 is embedded in the connecting hole 321, and the side of the protruding part 311 away from the cover plate 20 is arranged in a spaced manner with the inner wall of the connecting hole 321 along the thickness direction Z of the box body 10. The protruding part 311 can be a half-spherical block or a cuboid block, and the shape and size of the connecting hole 321 on the second connecting piece 32 can be completely matched with the shape and size of the protruding part 311, so as to ensure that the protruding part 311 can be completely embedded therein, forming a tight connection, avoiding relative movement between the first connecting piece 31 and the second connecting piece 32, ensuring the limiting effect of the first connecting piece 31 on the second connecting piece 32, and improving the firmness of the connection between the box body 10 and the cover plate 20 to a certain extent. The shape and size of the connecting hole 321 on the second connecting piece 32 can also not need to be completely matched with the shape and size of the protruding part 311, and the size of the connecting hole 321 can be larger than the size of the protruding part 311. In the thickness direction Z of the box body 10, the side of the protruding part 311 away from the cover plate 20 is spaced from the inner wall of the connecting hole 321. When the energy storage box is vented, the cover plate 20 can drive the second connecting piece 32 to move a certain distance in the thickness direction Z, and then the protruding part 311 contacts and is pressed against the inner wall of the connecting hole 321, so that the protruding part 311 of the first connecting piece 31 blocks the movement of the second connecting piece 32, thereby limiting the second connecting piece 32 from continuously moving in the thickness direction Z. The spaced arrangement can play a certain buffering effect on the cover plate 20 and the second connecting piece 32 when the energy storage box is vented, and can reduce the force of the second connecting piece 32 on the protruding part 311 of the first connecting piece 31. At the same time, since the two parts do not need to be tightly connected, the machining precision of the first connecting piece 31 and the second connecting piece 32 can be reduced, the machining difficulty is also reduced, and the machining efficiency of the structure is improved.

[0047] Please refer to Figure 1 、 Figure 3 and Figure 4The cover plate 20 comprises a plate body 21 and a rim 22 connected to the plate body 21. The cover plate 20 is a component of the energy storage box, and the cover plate 20 comprises the plate body 21 and the rim 22 connected to the plate body 21. The plate body 21 covers the opening 12, and the rim 22 is arranged around the outer periphery of the plate body 21. The plate body 21 is generally a flat or slightly convex plate structure, which covers the opening 12 and protects the storage cavity 11. The rim 22 is located at the edge of the plate body 21, which surrounds the plate body 21 and forms a connecting area between the cover plate 20 and the box body 10, so as to ensure the tight connection between the cover plate 20 and the box body 10. The second connecting piece 32 is connected to the rim 22, which is equivalent to the connection between the second connecting piece 32 and the cover plate 20. The cover plate 20 is further connected to the box body 10 through the rim 22, the first connecting piece 31 and the second connecting piece 32, which improves the firmness of the connection between the box body 10 and the cover plate 20. At the same time, since the rim 22 is located at the edge of the plate body 21, the second connecting piece 32 is more convenient to connect with the rim 22, and it is also conducive to the connection between the second connecting piece 32 and the first connecting piece 31, which can reduce the length and material of the second connecting piece 32 and reduce the cost.

[0048] Please refer to Figure 1 , Figure 3 and Figure 4 In some embodiments, the second connecting piece 32 comprises a fitting part 322 and a bending part 323. The fitting part 322 is generally located on the outside of the box body 10, which is limitingly connected with the first connecting piece 31 to ensure the stability of the pull buckle assembly 30. The bending part 323 is located between the rim 22 and the fitting part 322, and the bending part 323 is connected with the rim 22 and the fitting part 322 respectively. The bending part 323 can be an L-shaped structure or a cuboid structure. While one end of the bending part 323 is connected with the fitting part 322, the other end is in contact with the inner side surface of the rim 22, and then the bending part 323 and the rim 22 are connected through a connecting structure, so as to realize the connection between the fitting part 322 and the rim 22 through the bending part 323, and realize the connection between the second connecting piece 32 and the cover plate 20, and ensure the firmness of the connection between the cover plate 20 and the box body 10. In summary, the bending part 323 of the second connecting piece 32 is connected with the rim 22, which can realize the installation and fixation of the second connecting piece 32 as a whole. The fitting part 322 of the second connecting piece 32 is limitingly connected with the first connecting piece 31, so as to realize the limiting of the first connecting piece 31 by the second connecting piece 32.

[0049] Please refer to Figure 1 , Figure 3 and Figure 4In some embodiments, the bending portion 323 has a first hole 3231 along the length direction X of the box 10 and / or the width direction Y of the box 10, and the edge piece 22 has a second hole 221 corresponding to the first hole 3231. Since the buckle assembly 30 can be arranged on the outside of the energy storage box along the length direction X of the box 10, or along the width direction Y of the box 10, or along both the length direction X and the width direction Y of the box 10, the bending portion 323 of the buckle assembly 30 can also be arranged in this way. In the case where the surface connecting the bending portion 323 and the edge piece 22 is perpendicular to the large surface of the cover plate 20, if the bending portion 323 and the edge piece 22 are arranged along the length direction X of the box 10, the first hole 3231 and the second hole 221 connecting the bending portion 323 and the edge piece 22 are conveniently arranged along the length direction X of the box 10. If the bending portion 323 and the edge piece 22 are arranged along the width direction Y of the box 10, the first hole 3231 and the second hole 221 connecting the bending portion 323 and the edge piece 22 are conveniently arranged along the width direction Y of the box 10. If the bending portion 323 and the edge piece 22 are arranged along both the length direction X and the width direction Y of the box 10, the first hole 3231 and the second hole 221 connecting the bending portion 323 and the edge piece 22 are arranged along the length direction X of the box 10 in some parts and along the width direction Y of the box 10 in some other parts.

[0050] The energy storage box further comprises a fixing piece 40, which is arranged through the first hole 3231 and the second hole 221 to connect the bending portion 323 and the edge piece 22. The fixing piece 40 can be a bolt, a screw, a pin or other suitable fixing structure. The first hole 3231 can be circular, elliptical or other shapes, and is designed to accommodate the fixing piece 40. The second hole 221 has a shape and position matching the first hole 3231 to cooperate with the first hole 3231, so that the fixing piece 40 can pass through, thereby firmly connecting the bending portion 323 and the edge piece 22.

[0051] Please refer to Figure 1 , Figure 3 and Figure 4In some embodiments, the cover plate 20 comprises a plate body 21 and a rim 22 connected to the plate body 21. The plate body 21 is the main component of the cover plate 20. It is usually made of a strong material such as metal or high-strength plastic, and covers the top of the energy storage tank to protect the internal devices or structures from the external environment. The tank body 10 comprises an outer shell 13 and a connecting flange 14 arranged circumferentially along the outer shell 13, which is connected to the rim 22 and / or the plate body 21. Among them, the outer shell 13 is the main component of the tank body 10, which provides the overall structure of the energy storage tank. The outer shell 13 is usually made of a strong and corrosion-resistant material, which can cooperate with the plate body 21 to protect the devices and structures inside the energy storage tank. The connecting flange 14 can be an integral part arranged circumferentially along the outer shell 13, or it can be multiple parts arranged circumferentially along the outer shell 13 at intervals. The connecting flange 14 tightly cooperates with the rim 22 to ensure the stable connection between the cover plate 20 and the tank body 10. The connecting flange 14 is connected to the rim 22 and / or the plate body 21. That is, the connecting flange 14 can be connected to the rim 22, or it can be connected to the plate body 21, or it can be connected to both the rim 22 and the plate body 21. The connecting flange 14 can be tightly connected to the rim 22 and / or the plate body 21 by fixing structures such as bolts, clamps, screws, rivets, etc., which ensures the stable connection between the cover plate 20 and the tank body 10. The thickness of the connecting flange 14 along the thickness direction Z of the tank body 10 can be increased as needed, so that the side of the connecting flange 14 facing the rim 22 can better fit the inner side of the rim 22, and then the two are connected by the corresponding fixing structure. The fitting surface of the connecting flange 14 and the rim 22 can be perpendicular to the large surface of the plate body 21, or it can have other angles with the large surface of the plate body 21. The tight connection of the connecting flange 14 with the rim 22 or the plate body 21 can improve the stability of the connection between the tank body 10 and the cover plate 20. If the connecting flange 14 is tightly connected to both the rim 22 and the plate body 21, not only can it improve the stability of the connection between the tank body 10 and the cover plate 20, but also can increase the sealing between the two, preventing dust, moisture or other impurities from entering the energy storage tank.

[0052] See Figure 5 and Figure 6In some embodiments, the edge piece 22 has at least one notch 222 extending to the joint between the edge piece 22 and the plate body 21. The notch 222 can reduce the material usage of the edge piece 22 and reduce the strength of the edge piece 22. When an explosion occurs in the energy storage tank, the internal pressure is too large to cause a large extrusion to the cover plate 20. The gas in the energy storage tank needs to pass through the joint between the plate body 21 and the tank body 10 and the joint between the edge piece 22 and the tank body 10 to be released. At this time, the notch 222 provided on the edge piece 22 allows the gas to be directly released through the notch 222 after passing through the joint between the plate body 21 and the tank body 10, and the edge piece 22 does not prevent the gas from passing through. This makes the cover plate 20 more likely to deform at the position of the notch 222 when an explosion occurs in the energy storage tank, and the cover plate 20 and the tank body 10 are more likely to have a gap at the position of the notch 222, so that the gas in the energy storage tank can be released through the gap when the pressure reaches a certain value, thereby reducing the impact force of the explosion gas on the cover plate 20 and avoiding the cover plate 20 flying out of the tank body 10 to a certain extent.

[0053] Please refer to Figure 1 、 Figure 3 、 Figure 7 、 Figure 9 and Figure 10 In some embodiments, the plate body 21 includes a main body portion 211 connected to the tank body 10 and a thinned portion 212, the thinned portion 212 has a maximum dimension L1 in the thickness direction Z of the tank body 10, and the main body portion 211 has a maximum dimension L2, which satisfies: L1 < L2. It can be understood that the thickness of the thinned portion 212 in the thickness direction Z of the tank body 10 is smaller than the thickness of the main body portion 211, and the thinned portion 212 can reduce the material usage of the plate body 21 while reducing the strength of the plate body 21 at the thinned portion 212. When an explosion occurs in the energy storage tank, the gas in the energy storage tank will cause a large extrusion to the cover plate 20, and the maximum dimension L1 of the thinned portion 212 in the thickness direction Z is smaller than the maximum dimension L2 of the main body portion 211 in the thickness direction Z, so that the strength of the thinned portion 212 is smaller than the strength of the main body portion 211. When the cover plate 20 and the tank body 10 are continuously extruded by the gas in the energy storage tank, the thinned portion 212 will first be damaged, and the gas in the energy storage tank can be released from the damaged thinned portion 212, thereby reducing the pressure of the gas in the energy storage tank and preventing the cover plate 20 from flying out of the tank body 10, thereby improving the safety of the energy storage tank during use.

[0054] Please refer to Figure 1 、 Figure 8 and Figure 9In some embodiments, the main body 211 includes a first main body 2111 and a second main body 2112. The first main body 2111 and the second main body 2112 are both connected to the box body 10, and the thinning portion 212 is located between the first main body 2111 and the second main body 2112 to separate the first main body 2111 and the second main body 2112. The thinning portion 212 is connected to the first main body 2111 and the second main body 2112, respectively. By arranging the thinning portion 212 between the first main body 2111 and the second main body 2112, the thinning portion 212 can be arranged at a position towards the inside of the battery along the thickness direction Z of the box body 10. When the battery explodes, the explosion gas can act on the thinning portion 212 as soon as possible, causing the thinning portion 212 to deform, that is, causing the joint between the cover plate 20 and the box body 10 to produce a gap in the direction in which the thinning portion 212 extends as soon as possible, and releasing the explosion gas in the energy storage box as soon as possible.

[0055] Please refer to Figure 7 , Figure 8 and Figure 9 In some embodiments, the main body 211 and the thinning portion 212 are of an integrated structure. They are connected together to form a connected whole, and the materials of the two are the same. The joint between the main body 211 and the thinning portion 212 does not have a gap, and even if the thinning portion 212 deforms to a certain extent, the sealing of the cover plate 20 can be ensured. At the same time, the integrated structure can also ensure the strength required by the cover plate 20 to a certain extent.

[0056] An electric device includes the energy storage box of any one of the above. The electric device has all the technical features and advantages of the energy storage box, and will not be described in detail here.

[0057] In the above embodiments, the description of each embodiment focuses on different aspects. The parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0058] The energy storage box and the electric device provided by the embodiments of the present application are described in detail above, and specific examples are applied to describe the principles and implementation modes of the present application. The above description of the embodiments is only 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 by equivalents; and these modifications or replacements do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage tank, characterized by, The energy storage box comprises: a box body (10) having a containing cavity (11) and an opening (12) communicating with the containing cavity (11); a cover plate (20) connected to the box body (10) and covering the opening (12); a pull buckle assembly (30) comprising a first connecting piece (31) connected to the box body (10) and a second connecting piece (32) connected to the cover plate (20), and the first connecting piece (31) and the second connecting piece (32) are limitingly connected.

2. The energy storage tank of claim 1, wherein, The first connecting piece (31) and the second connecting piece (32) are limitingly connected by clamping, or the second connecting piece (32) has a displacement allowance relative to the first connecting piece (31) along the thickness direction (Z) of the box body (10).

3. The energy storage tank of claim 2, wherein, The first connecting piece (31) comprises a protruding portion (311) and a body (312), the body (312) is connected to the box body (10), and the protruding portion (311) is protrudingly arranged on the side of the body (312) away from the box body (10); the second connecting piece (32) has a connecting hole (321), the protruding portion (311) is clampedly connected with the connecting hole (321), or the protruding portion (311) is embedded in the connecting hole (321), and the side of the protruding portion (311) away from the cover plate (20) is spaced apart from the inner wall of the connecting hole (321) along the thickness direction (Z) of the box body (10).

4. The energy storage tank of claim 1, wherein, The cover plate (20) comprises a plate body (21) and an edge piece (22) connected to the plate body (21), the plate body (21) covers the opening (12), and the edge piece (22) is arranged around the outer periphery of the plate body (21); the second connecting piece (32) is connected to the edge piece (22).

5. The energy storage tank of claim 4, wherein, The second connecting piece (32) comprises: a fitting portion (322) located on the outside of the box body (10), the fitting portion (322) is limitingly connected with the first connecting piece (31); a bending portion (323) located between the edge piece (22) and the fitting portion (322), and the bending portion (323) is connected with the edge piece (22) and the fitting portion (322) respectively.

6. The energy storage tank of claim 5, wherein, The bending portion (323) has a first hole (3231) along the length direction (X) and / or the width direction (Y) of the box body (10), and the edge piece (22) has a second hole (221) corresponding to the first hole (3231); The energy storage box further comprises: a fixing piece (40) penetrating through the first hole (3231) and the second hole (221) to connect the bending portion (323) and the edge piece (22).

7. The energy storage tank of claim 4, wherein, The box body (10) comprises an outer shell (13) and a connecting flange (14) arranged circumferentially along the outer shell (13), and the connecting flange (14) is connected to the edge piece (22) and / or the plate body (21).

8. The energy storage tank of claim 4, wherein, The edge piece (22) has at least one notch (222) extending to the connection between the edge piece (22) and the plate body (21).

9. The energy storage tank of claim 4, wherein, The plate body (21) comprises a main body portion (211) connected to the box body (10) and a thinned portion (212), the thinned portion (212) has a maximum dimension L1, and the main body portion (211) has a maximum dimension L2, and L1 < L2.

10. The energy storage tank of claim 9, wherein, The main body portion (211) comprises: The first main body (2111) and the second main body (2112) are both connected to the box body (10), and the thinned portion (212) is located between the first main body (2111) and the second main body (2112) to separate the first main body (2111) and the second main body (2112), and the thinned portion (212) is connected to the first main body (2111) and the second main body (2112) respectively.

11. The energy storage tank of claim 9, wherein, The main body portion (211) and the thinned portion (212) are of an integrated structure.

12. An electrical device, characterized by An energy storage box comprising any one of the energy storage boxes according to claims 1 to 11.

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