CN219717076U - Box, battery and energy storage system - Google Patents

Abstract

The embodiment of the utility model provides a box body, a battery and an energy storage system, wherein the box body comprises a base body and a cover body, the cover body is fixedly connected to the base body, the cover body and the base body form a containing cavity and a filling cavity together, and the filling cavity is arranged on at least part of the peripheral side of the containing cavity and is used for filling a sealing medium; the seat and the cover are connected between the receiving chamber and the filling chamber and between the filling chamber and the external space and allow the passage of gas. The utility model can reduce the manufacturing cost of the box body.

Description

Box, battery and energy storage system

Technical Field

The utility model relates to the technical field of batteries, and in particular relates to a box body, a battery and an energy storage system.

Background

Battery cells are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like.

The battery comprises a box body and a battery monomer positioned in the box body, and in the development of battery technology, how to reduce the manufacturing cost of the box body is one research direction in the battery technology.

Disclosure of Invention

The utility model provides a box body, a battery and an energy storage system, which can reduce the manufacturing cost of the box body.

The embodiment of the utility model provides a box body, which comprises a base body and a cover body, wherein the cover body is fixedly connected to the base body, the cover body and the base body jointly form a containing cavity and a filling cavity, and the filling cavity is arranged on at least part of the peripheral side of the containing cavity and is used for filling a sealing medium; the seat and the cover are connected between the receiving chamber and the filling chamber and between the filling chamber and the external space and allow the passage of gas.

In the technical scheme, after the filling cavity is filled with the sealing medium, the sealing medium can form a sealing effect on the cover body and the seat body, so that the probability of impurities entering the accommodating cavity is reduced. And when the battery monomer in the box body generates gas, the air pressure in the box body is increased, and the high-pressure gas can overflow outwards through the sealing medium, so that the pressure release effect is realized. Therefore, the box body provided by the utility model is provided with the filling cavity for containing the sealing medium, so that the double effects of sealing and pressure relief can be achieved, the structure of the box body is simplified, and the manufacturing cost of the box body is reduced.

In some embodiments, the cover includes a cover body that covers the receiving cavity and the filling cavity, and an extension at least a portion of which is configured to extend into the sealing medium.

In the technical scheme, even if the sealing medium is gradually reduced in the using process, the extension part extending into the sealing medium can still be in contact with the sealing medium, so that the sealing medium is matched with the sealing medium to block impurities in an external space, the probability that the impurities enter the accommodating cavity is reduced, and the sealing effect of the box body is improved.

In some embodiments, the extension abuts a first wall of the housing facing the filling chamber, the first wall being located between the receiving chamber and the filling chamber.

In the technical scheme, the extending part is abutted to the first wall part, and the base body can form a limiting effect on the cover body through the extending part, so that the cover body is convenient to assemble on the base body. And moreover, the extension part is abutted to the first wall part, so that the extension part can play a role in blocking the sealing medium, the volume of the sealing medium entering the accommodating cavity is reduced, and the influence of the sealing medium on the battery cells in the accommodating cavity is reduced.

In some embodiments, the filling chamber is disposed around the receiving chamber, and the extension portion penetrates the filling chamber in an extending direction of the filling chamber around the receiving chamber.

In the technical scheme, the extension part is communicated with the filling cavity, so that the extension part can be matched with the sealing medium in the whole filling cavity to block impurities in the external space, and the sealing performance of the box body is further improved.

In some embodiments, the filling chamber is disposed circumferentially about the receiving chamber.

In the technical scheme, the filling cavity is arranged in the accommodating cavity in a surrounding mode, namely, the filling cavity can seal and relieve pressure on the periphery of the accommodating cavity, and the sealing performance and reliability of the box body are further improved.

In some embodiments, the base includes a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall enclosing to form at least a portion of the receiving cavity, and the filling cavity is disposed in the side wall.

In the above technical scheme, compare in setting up filling cavity in the diapire, set up filling cavity in the lateral wall, can reduce the preparation degree of difficulty of pedestal, reduce the space that the box occupy.

In some embodiments, the side wall includes a base wall, a first wall portion and a second wall portion, the base wall is connected to the bottom wall, the first wall portion and the second wall portion are both connected to the base wall and are respectively connected to the cover body, gas is allowed to pass through between the first wall portion and the cover body and between the second wall portion and the cover body, the first wall portion faces the accommodating cavity, the second wall portion is arranged on one side of the first wall portion away from the accommodating cavity and is arranged at intervals with the first wall portion, and the base wall, the first wall portion, the second wall portion and the cover body enclose to form a filling cavity.

In the technical scheme, the side wall is arranged to comprise the base wall, the first wall part and the second wall part, the base wall and the bottom wall are independently arranged, the position of the filling cavity formed by the mode is flexible, the position can be set according to different working conditions, and the application range of the box body is improved.

In some embodiments, the cover is connected to a side of the first wall portion facing away from the bottom wall.

In the above technical scheme, connect the lid in the one side that the first wall portion deviates from the diapire, the lid is connected in the upper surface of first wall portion promptly, and first wall portion can play the bearing effect to the lid, not only makes things convenient for the connection of lid and pedestal to reduced the atress of two junction, increased the durability in use after lid and the pedestal are connected.

In some embodiments, the second wall portion is higher than the first wall portion in the vertical direction.

In the above technical solution, the second wall portion is higher than the first wall portion, so that the second wall portion can play a role in blocking the sealing medium, and the volume of the sealing medium entering the external space is reduced.

In some embodiments, the first wall portion has a first cavity located between the filling cavity and the receiving cavity; and/or the second wall part has a second cavity, which is located on the side of the filling chamber facing away from the receiving chamber.

In the technical scheme, the first cavity is formed in the first wall part, so that the extrusion resistance of the first wall part can be increased, and the structural strength of the box body is improved. The second cavity is arranged on the second wall part, so that the extrusion resistance of the second wall part can be increased, and the structural strength of the box body is improved.

In some embodiments, the base wall and the bottom wall are disposed opposite to each other along a direction in which the bottom wall faces the cover, and the base further includes at least two support plates disposed opposite to each other, and the at least two support plates are disposed between the base wall and the bottom wall and enclose a third cavity with the base wall and the bottom wall.

In the technical scheme, the base wall, the bottom wall and the supporting plate are used for enclosing to form the third cavity so as to increase the extrusion resistance of the box body and further improve the structural strength of the box body.

In some embodiments, the cover body includes a first cover portion, a transition portion, and a second cover portion that are sequentially connected, the first cover portion covers the accommodating cavity, the second cover portion covers the filling cavity and is connected with the seat body, gas is allowed to pass through between the second cover portion and the seat body, the extension portion is disposed on one side of the second cover portion facing the filling cavity, the transition portion is disposed obliquely relative to the first cover portion and the second cover portion, and the first cover portion is disposed on one side of the second cover portion facing away from the filling cavity.

In the above technical scheme, the first cover part is arranged on one side of the second cover part deviating from the filling cavity, so that the volume of the accommodating cavity can be increased, the capacity of the box body is improved, the height of the seat body can be reduced, and the seat body can be manufactured conveniently.

In a second aspect, an embodiment of the present utility model provides a battery, including the above-mentioned case, a battery unit, and a sealing medium, where the battery unit is accommodated in the accommodating cavity, and the sealing medium is accommodated in the filling cavity.

In some embodiments, the sealing medium comprises a sealing liquid.

In the above technical solution, the sealing medium is set as the sealing liquid, and compared with the sealing medium in a solid state, the sealing liquid can have lighter weight, so that the battery can be moved conveniently.

In a third aspect, an embodiment of the present utility model provides an energy storage system, including a power generation device and the battery described above, where the battery is connected to the power generation device and is used to store electric energy generated by the power generation device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an energy storage system according to some embodiments of the present utility model;

fig. 2 is a schematic view of a partial structure of a battery according to some embodiments of the present utility model;

fig. 3 is a partial schematic structure of a case of the battery shown in fig. 2.

Reference numerals of the specific embodiments are as follows:

100. an energy storage system; 200. a battery; 300. a power generation device; 400. a case; 500. a battery cell;

1. a base; 11. a bottom wall; 12. a sidewall; 121. a base wall; 122. a first wall portion; 1221. a first cavity; 123. a second wall portion; 1231. a second cavity; 13. a support plate; 14. a third cavity;

2. a cover body; 21. a cover body; 211. a first cover part; 212. a transition section; 213. a second cover part; 22. an extension;

3. a receiving chamber;

4. filling the cavity;

5. sealing medium;

x, vertical direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present utility model is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present utility model, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present utility model, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the utility model shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the utility model in any way.

The term "plurality" as used herein refers to two or more (including two).

In the present utility model, the battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present utility model. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the utility model.

Reference to a battery in accordance with an embodiment of the present utility model refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present utility model may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. Taking a lithium ion battery monomer as an example, the material of the positive electrode current collector can be aluminum, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The battery cell further includes a case inside which a receiving chamber for receiving the electrode assembly is formed. The case may protect the electrode assembly from the outside to prevent foreign substances from affecting the charge or discharge of the electrode assembly.

The box of battery usually includes lid and pedestal, and lid and pedestal enclose and form the chamber that holds that is used for holding battery monomer, need pass through sealing member sealing connection between lid and the pedestal. In addition, an explosion-proof valve is usually required to be arranged on the cover body so as to improve the reliability of the battery.

The arrangement of the sealing part and the explosion-proof valve can lead to the complex structure of the box body, more parts and components and cause the increase of the cost of the box body.

In view of this, the present utility model provides a case including a housing and a cover that together form a receiving chamber and a filling chamber provided at least a part of an outer peripheral side of the receiving chamber, the receiving chamber being for receiving a battery cell, the filling chamber being for filling a sealing medium, and the receiving chamber and the filling chamber being connected and allowing a gas to pass through between the housing and the cover, and between the filling chamber and an outer space. Therefore, after the filling cavity is filled with the sealing medium, the sealing medium can form a sealing effect between the cover body and the seat body, so that the probability of impurities entering the accommodating cavity is reduced. And when the battery monomer in the box body generates gas, the air pressure in the box body is increased, and the high-pressure gas can overflow outwards through the sealing medium, so that the pressure release effect is realized. Therefore, the box body of the utility model adopts the sealing medium to achieve the double effects of sealing and pressure relief, simplify the structure of the box body and reduce the manufacturing cost of the box body.

The box body described in the embodiment of the utility model not only can be suitable for batteries and energy storage systems using the batteries, but also can be suitable for storing other structures needing sealing, for example, electronic products or chemical raw materials and the like.

For convenience of description, the following examples will be described with the case used in the energy storage system.

Fig. 1 is a schematic structural diagram of an energy storage system according to some embodiments of the present utility model.

As shown in fig. 1, the energy storage system 100 includes a power generation device 300 and a battery 200, and the battery 200 is connected to the power generation device 300 and is used for storing electric energy generated by the power generation device 300.

The power generation device 300 of the embodiment of the present utility model may be a solar power generation device, a hydroelectric power generation device, a wind power generation device, a thermal power generation device, or other power generation devices.

Fig. 2 is a schematic view illustrating a partial structure of a battery according to some embodiments of the present utility model.

As shown in fig. 2, the present utility model further provides a battery 200, which includes a battery cell 500 and a case 400, wherein the battery cell 500 is accommodated in the case 400.

In the battery 200, the number of the battery cells 500 may be one or more. If there are multiple battery cells 500, the multiple battery cells 500 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to that there are both series connection and parallel connection among the multiple battery cells 500. The plurality of battery cells 500 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 500 is fixed on the bearing part; of course, a plurality of battery cells 500 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or series-parallel to form a whole and fixed on the bearing member.

Fig. 3 is a partial schematic structure of a case of the battery shown in fig. 2.

As shown in fig. 3, the present utility model provides a case 400, which includes a base 1 and a cover 2, wherein the cover 2 is fixedly connected to the base 1, the cover 2 and the base 1 together form a containing cavity 3 and a filling cavity 4, and the filling cavity 4 is disposed at least on part of the outer periphery side of the containing cavity 3 and is used for filling a sealing medium 5; between the receiving chamber 3 and the filling chamber 4 and between the filling chamber 4 and the outer space, the seat body 1 and the cover body 2 are connected and allow the passage of gas.

The accommodating cavity 3 of the embodiment of the utility model is used for accommodating the battery cell 500, and the filling cavity 4 is positioned outside the accommodating cavity 3. The filling chamber 4 may be provided around a part of the outer peripheral side of the accommodating chamber 3, or may be provided around the entire outer peripheral side of the accommodating chamber 3.

The fixed connection of the embodiments of the present utility model is fixed together, and may be implemented in a detachable manner or in a non-detachable manner.

In the embodiment of the utility model, the seat body 1 and the cover body 2 are connected and allow gas to pass through, specifically, the cover body 2 and the seat body 1 can be respectively connected in a manner of abutting, bonding or threaded connection at the part between the accommodating cavity 3 and the filling cavity 4 and the part between the filling cavity 4 and the external space, and meanwhile, the gas communication between the accommodating cavity 3 and the filling cavity 4 and the gas communication between the filling cavity 4 and the external space are maintained.

The cover 2 and the base 1 may be fixedly connected at a portion between the accommodating chamber 3 and the filling chamber 4, or fixedly connected at a portion between the filling chamber 4 and the external space, or fixedly connected at both a portion between the accommodating chamber 3 and the filling chamber 4 and a portion between the filling chamber 4 and the external space.

The sealing medium 5 of the embodiment of the present utility model may be a liquid sealing medium 5 such as water, mineral oil, synthetic oil, or the like. Of course, the sealing medium 5 may be a solid sealing medium, such as bentonite.

The sealing medium 5 may fill the filling chamber 4 or may fill a part of the filling chamber 4. When the sealing medium 5 fills the filling cavity 4, the cover body 2 is abutted against the sealing medium 5, and impurities in the external space need to pass through the sealing medium 5 when entering from between the cover body 2 and the base body 1, so that the impurities can be blocked by the sealing medium 5 and can not almost enter, thereby playing a role in sealing. When the sealing medium 5 is filled in the partially filled cavity 4, the cover 2 is arranged so that impurities in the external space can be blocked by the sealing medium 5.

The case 400 in the embodiment of the utility model is provided with the base body 1 and the cover body 2, the cover body 2 and the base body 1 jointly form the accommodating cavity 3 and the filling cavity 4, the accommodating cavity 3 is used for accommodating the battery cell 500, and the filling cavity 4 is used for filling the sealing medium 5. In this way, after the filling cavity 4 is filled with the sealing medium 5, the sealing medium 5 can form a sealing effect on the cover body 2 and the base body 1, so that the probability of impurities entering the accommodating cavity 3 is reduced. When the battery cell 500 in the case 400 generates gas, the gas pressure in the case 400 increases, and the high-pressure gas can escape outward through the sealing medium 5, thereby realizing the pressure release effect. Therefore, the filling cavity 4 for accommodating the sealing medium 5 is arranged in the box 400, so that the double effects of sealing and pressure relief can be achieved, the structure of the box 400 is simplified, and the manufacturing cost of the box 400 is reduced.

Besides, between the accommodating cavity 3 and the filling cavity 4 and between the filling cavity 4 and the external space, the base body 1 and the cover body 2 are connected, and the connected cover body 2 and base body 1 can reduce the probability that the sealing medium 5 enters the accommodating cavity 3 and overflows to the external space, thereby reducing the harm of the sealing medium 5 to the battery cell 500 and improving the reliability of the box body 400.

In some embodiments, the cover 2 comprises a cover body 21 and an extension 22, the cover body 21 covering the receiving chamber 3 and the filling chamber 4, at least part of the extension 22 being intended to extend into the sealing medium 5.

The extension 22 of the embodiment of the utility model may extend partly into the sealing medium 5 or may extend entirely into the sealing medium 5.

The extension 22 of embodiments of the present utility model may be plate-like, bar-like, or other shapes.

Even if the sealing medium 5 is gradually reduced in the use process, the extension part 22 extending into the sealing medium 5 can still be in contact with the sealing medium 5, so that the sealing medium 5 is matched with the sealing medium 5 to block impurities in an external space, the probability that the impurities enter the accommodating cavity 3 is reduced, and the sealing effect of the box 400 is improved.

In some embodiments, the extension 22 abuts against a first wall 122 of the seat 1 facing the filling chamber 4, the first wall 122 being located between the containing chamber 3 and the filling chamber 4.

The extending portion 22 is abutted against the first wall portion 122, and the base 1 can form a limiting effect on the cover 2 through the extending portion 22, so that the cover 2 is convenient to assemble on the base 1. In addition, the extension portion 22 abuts against the first wall portion 122, the extension portion 22 can play a role in blocking the sealing medium 5, and the volume of the sealing medium 5 entering the accommodating cavity 3 is reduced, so that the influence of the sealing medium 5 on the battery cells 500 in the accommodating cavity 3 is reduced.

In some embodiments, the filling chamber 4 is arranged around the receiving chamber 3, and the extension 22 penetrates the filling chamber 4 in the extension direction of the filling chamber 4 around the receiving chamber 3.

The filling chamber 4 of the embodiment of the present utility model may surround a part of the outer peripheral side of the accommodating chamber 3, or may surround the entire outer peripheral side of the accommodating chamber 3.

In the embodiment of the present utility model, the extending direction of the filling chamber 4 around the accommodating chamber 3 means the extending direction of the filling chamber 4 along the outer peripheral side of the accommodating chamber 3.

The extension portion 22 is disposed through the filling cavity 4, so that the extension portion 22 can cooperate with the sealing medium 5 to block impurities in the external space in the whole filling cavity 4, thereby further improving the sealing performance of the case 400.

In some embodiments, the filling chamber 4 is arranged circumferentially to the receiving chamber 3.

The filling cavity 4 is arranged around the accommodating cavity 3, namely, the filling cavity 4 can seal and relieve pressure on the periphery of the accommodating cavity 3, so that the sealing performance and reliability of the box 400 are further improved.

In some embodiments, the base 1 includes a bottom wall 11 and a side wall 12 connected to the bottom wall 11, where the bottom wall 11 and the side wall 12 enclose at least a portion of the accommodating cavity 3, and the filling cavity 4 is disposed on the side wall 12.

The side wall 12 of the present embodiment is connected to the bottom wall 11 and is connected at an angle to the bottom wall 11. Alternatively, the number of the side walls 12 is four, and four side walls 12 are connected to the same side of the bottom wall 11 and enclose at least part of the accommodating cavity 3 with the bottom wall 11.

The filling cavity 4 according to the embodiment of the present utility model is disposed on the side wall 12, and is not representative of the side wall 12 alone forming the filling cavity 4, but is disposed on the side wall 12, and the side wall 12 and the cover 2 together form the filling cavity 4.

Compared with the filling cavity 4 arranged on the bottom wall 11, the filling cavity 4 is arranged on the side wall 12, so that the manufacturing difficulty of the seat body 1 can be reduced, and the space occupied by the box body 400 can be reduced.

In some embodiments, the side wall 12 includes a base wall 121, a first wall portion 122 and a second wall portion 123, the base wall 121 is connected to the bottom wall 11, the first wall portion 122 and the second wall portion 123 are connected to the base wall 121 and are respectively connected to the cover 2, gas is allowed to pass between the first wall portion 122 and the cover 2 and between the second wall portion 123 and the cover 2, the first wall portion 122 faces the accommodating cavity 3, the second wall portion 123 is disposed on a side of the first wall portion 122 facing away from the accommodating cavity 3 and is spaced from the first wall portion 122, and the base wall 121, the first wall portion 122, the second wall portion 123 and the cover 2 enclose to form the filling cavity 4.

The base wall 121 and the bottom wall 11 of the embodiment of the present utility model may be disposed flush, or may be disposed at vertical intervals and connected.

The first wall portion 122 and the second wall portion 123 of the embodiment of the present utility model are respectively connected to the cover 2, and specifically, may adopt a manner of abutting, bonding, screwing, or the like.

The first wall portion 122 and the second wall portion 123 of the embodiment of the present utility model may have a plate-like, frame-like structure or other structures.

Alternatively, the base wall 121, the first wall portion 122, the second wall portion 123, and the bottom wall 11 are integrally formed. Further alternatively, the base 1 is made of an extruded profile.

The side wall 12 is arranged to comprise the base wall 121, the first wall part 122 and the second wall part 123, the base wall 121 and the bottom wall 11 are independently arranged, the position of the filling cavity 4 formed by adopting the mode is flexible, the position can be set according to different working conditions, and the application range of the box 400 is improved.

In some embodiments, the cover 2 is connected to a side of the first wall portion 122 facing away from the bottom wall 11.

The cover body 2 is connected to one surface of the first wall portion 122, which is away from the bottom wall 11, namely, the cover body 2 is connected to the upper surface of the first wall portion 122, the first wall portion 122 can play a bearing role on the cover body 2, so that the connection between the cover body 2 and the base body 1 is facilitated, the stress of the connection between the cover body 2 and the base body 1 is reduced, and the durability of the cover body 2 and the base body 1 after connection is improved.

In some embodiments, the second wall portion 123 is higher than the first wall portion 122 in the vertical direction X.

The second wall portion 123 is provided higher than the first wall portion 122, so that the second wall portion 123 can act as a barrier for the sealing medium 5, reducing the volume of the sealing medium 5 entering the external space.

Illustratively, the cover 2 is connected to the side of the second wall 123 facing the filling chamber 4 and allows the passage of gas.

In some embodiments, the first wall portion 122 has a first cavity 1221, the first cavity 1221 being located between the filling cavity 4 and the receiving cavity 3; and/or the second wall 123 has a second cavity 1231, the second cavity 1231 being located on the side of the filling chamber 4 facing away from the receiving chamber 3.

The first wall 122 of the embodiment of the utility model surrounds a first cavity 1221, and the second wall 123 surrounds a second cavity 1231.

The first cavity 1221 of the embodiment of the present utility model may be provided at a portion of the first wall portion 122, or may penetrate the first wall portion 122 in the extending direction of the first wall portion 122 around the accommodating chamber 3.

The second cavity 1231 according to the embodiment of the present utility model may be provided at a portion of the second wall portion 123, or may penetrate the second wall portion 123 in the extending direction of the second wall portion 123 around the first wall portion 122.

Providing the first cavity 1221 in the first wall 122 may increase the crush resistance of the first wall 122, thereby improving the structural strength of the case 400.

Providing the second cavity 1231 in the second wall 123 may increase the crush resistance of the second wall 123, thereby improving the structural strength of the case 400.

In some embodiments, the base wall 121 and the bottom wall 11 are disposed opposite to each other along a direction that the bottom wall 11 faces the cover 2, and the base 1 further includes at least two support plates 13 disposed opposite to each other, where at least two support plates 13 are disposed between the base wall 121 and the bottom wall 11, and form a third cavity 14 with the base wall 121 and the bottom wall 11.

In the embodiment of the present utility model, the support plates 13 are disposed opposite to each other, which does not represent that the two support plates 13 are parallel to each other, but may be inclined with respect to each other, but it is necessary that the support plates can be enclosed with the base wall 121 and the bottom wall 11 to form a quadrilateral structure, so as to enclose and form the third cavity 14.

When the number of the supporting plates 13 exceeds three, the plurality of supporting plates 13 may be arranged at intervals to enclose and form a plurality of third cavities 14, and of course, the plurality of supporting plates may also be arranged in a fitting manner on the premise of enclosing and forming at least one third cavity 14.

Alternatively, the plurality of support plates 13 are parallel to each other. Further alternatively, opposite ends of the support plate 13 are disposed perpendicularly to the base wall 121 and the bottom wall 11, respectively.

The third cavity 14 is formed by surrounding the base wall 121, the bottom wall 11 and the support plate 13 to increase the anti-extrusion capability of the case 400, thereby improving the structural strength of the case 400.

In some embodiments, the cover body 21 includes a first cover portion 211, a transition portion 212 and a second cover portion 213 sequentially connected, where the first cover portion 211 covers the accommodating cavity 3, the second cover portion 213 covers the filling cavity 4 and is connected to the base 1, the second cover portion 213 and the base 1 allow gas to pass through, the extension portion 22 is disposed on a side of the second cover portion 213 facing the filling cavity 4, the transition portion 212 is disposed obliquely with respect to the first cover portion 211 and the second cover portion 213, and the first cover portion 211 is located on a side of the second cover portion 213 facing away from the filling cavity 4.

The second covering portion 213 of the embodiment of the present utility model is connected to the base 1, that is, the second covering portion 213 is connected to the first wall portion 122 and the second wall portion 123.

The second cover 213 and the base 1 allow gas to pass through, that is, the second cover 213 and the first wall 122 and the second wall 123 allow gas to pass through, so that gas flow is maintained between the accommodating chamber 3 and the filling chamber 4 and between the filling chamber 4 and the external space.

Illustratively, the first covering portion 211, the inclined portion, and the second covering portion 213 of the embodiment of the present utility model are plate-shaped members.

The first closing part 211 is located on the side of the second closing part 213 facing away from the filling chamber 4, i.e. the first closing part 211 is further away from the bottom wall 11 than the second closing part 213.

The first cover portion 211 is disposed on the side of the second cover portion 213 away from the filling cavity 4, so that the volume of the accommodating cavity 3 can be increased, the capacity of the box 400 can be increased, the height of the seat 1 can be reduced, and the seat 1 can be manufactured conveniently.

The embodiment of the utility model provides a battery 200, wherein the battery 200 comprises the box 400, a battery cell 500 and a sealing medium 5. The battery cell 500 is accommodated in the accommodation chamber 3, and the sealing medium 5 is accommodated in the filling chamber 4.

In some embodiments, the sealing medium comprises a sealing liquid.

The sealing liquid of the embodiment of the utility model can be water, mineral oil, synthetic oil and other liquids.

The sealing medium is provided as a sealing liquid, which may have a lighter weight than a solid sealing medium, facilitating the movement of the battery 200.

The embodiment of the utility model provides an energy storage system 100, which comprises a power generation device 300 and the battery 200, wherein the battery 200 is connected to the power generation device 300 and is used for storing electric energy generated by the power generation device 300.

Referring to fig. 2 and 3, an embodiment of the present utility model provides a case 400, which includes a base 1 and a cover 2, wherein the cover 2 is fixedly connected to the base 1, the cover 2 and the base 1 together form a containing cavity 3 and a filling cavity 4, and the filling cavity 4 is disposed at least on part of the outer periphery side of the containing cavity 3 and is used for filling a sealing medium 5; between the receiving chamber 3 and the filling chamber 4 and between the filling chamber 4 and the outer space, the seat body 1 and the cover body 2 are connected and allow the passage of gas. The cover body 2 comprises a cover body 21 and an extension 22, the cover body 21 covering the receiving chamber 3 and the filling chamber 4, at least part of the extension 22 being intended to extend into the sealing medium 5. The extension 22 abuts against a first wall portion 122 of the housing 1 facing the filling chamber 4, the first wall portion 122 being located between the receiving chamber 3 and the filling chamber 4. The filling chamber 4 is provided around the accommodating chamber 3, and the extending portion 22 penetrates the filling chamber 4 in the extending direction in which the filling chamber 4 surrounds the accommodating chamber 3.

The seat body 1 comprises a bottom wall 11 and a side wall 12 connected with the bottom wall 11, the bottom wall 11 and the side wall 12 are surrounded to form at least part of the accommodating cavity 3, and the filling cavity 4 is arranged on the side wall 12. The side wall 12 comprises a base wall 121, a first wall part 122 and a second wall part 123, the base wall 121 is connected to the bottom wall 11, the first wall part 122 and the second wall part 123 are connected to the base wall 121 and are respectively connected with the cover body 2, gas is allowed to pass through between the first wall part 122 and the cover body 2 and between the second wall part 123 and the cover body 2, the first wall part 122 faces the accommodating cavity 3, the second wall part 123 is arranged on one side of the first wall part 122 away from the accommodating cavity 3 and is arranged at intervals with the first wall part 122, and the base wall 121, the first wall part 122, the second wall part 123 and the cover body 2 enclose to form the filling cavity 4. The cover 2 is connected to a side of the first wall portion 122 facing away from the bottom wall 11. The second wall portion 123 is higher than the first wall portion 122 in the vertical direction X. The sealing medium comprises a sealing liquid.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (15)

1. A tank, comprising:

a base;

the cover body is fixedly connected with the base body, the cover body and the base body form a containing cavity and a filling cavity together, and the filling cavity is arranged on at least part of the peripheral side of the containing cavity and is used for filling sealing medium; the seat body and the cover body are connected between the accommodating chamber and the filling chamber and between the filling chamber and the external space and allow gas to pass through.

2. The case of claim 1, wherein the cover includes a cover body that covers the receiving chamber and the filling chamber, and an extension portion at least a portion of which is for extending into the sealing medium.

3. The case according to claim 2, wherein the extension portion abuts against a first wall portion of the seat body facing the filling chamber, the first wall portion being located between the containing chamber and the filling chamber.

4. The cabinet of claim 2, wherein said filling chamber is disposed around said receiving chamber,

in the extending direction of the filling cavity surrounding the accommodating cavity, the extending part penetrates through the filling cavity.

5. The cabinet according to any one of claims 1-4, wherein the filling chamber is circumferentially disposed to the receiving chamber.

6. The cabinet of any one of claims 1-4, wherein the housing comprises a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall enclosing to form at least a portion of a receiving cavity, the filling cavity being disposed in the side wall.

7. The case according to claim 6, wherein the side wall includes a base wall, a first wall portion and a second wall portion, the base wall is connected to the bottom wall, the first wall portion and the second wall portion are connected to the base wall and are respectively connected to the cover, gas is allowed to pass through between the first wall portion and the cover and between the second wall portion and the cover, the first wall portion faces the accommodating chamber, the second wall portion is disposed on a side of the first wall portion facing away from the accommodating chamber and is spaced from the first wall portion, and the base wall, the first wall portion, the second wall portion and the cover are enclosed to form the filling chamber.

8. The case of claim 7, wherein the cover is attached to a side of the first wall portion facing away from the bottom wall.

9. The cabinet according to claim 7, wherein the second wall portion is higher than the first wall portion in a vertical direction.

10. The case of claim 7, wherein the first wall portion has a first cavity between the filling cavity and the receiving cavity; and/or the number of the groups of groups,

the second wall portion has a second cavity located on a side of the filling cavity facing away from the receiving cavity.

11. The cabinet of claim 7, wherein said base wall and said bottom wall are disposed opposite each other in a direction in which said bottom wall faces said cover,

the base body further comprises at least two supporting plates which are oppositely arranged, wherein at least two supporting plates are arranged between the base wall and the bottom wall and enclose with the base wall and the bottom wall to form a third cavity.

12. The case according to claim 2, wherein the cover body includes a first cover portion, a transition portion, and a second cover portion connected in this order, the first cover portion being covered with the accommodating chamber, the second cover portion being covered with the filling chamber and connected with the base body, the second cover portion and the base body allowing passage of gas therebetween, the extension portion being provided on a side of the second cover portion facing the filling chamber, the transition portion being provided obliquely with respect to the first cover portion and the second cover portion,

the first cover part is positioned at one side of the second cover part, which is away from the filling cavity.

13. A battery, comprising:

a cabinet according to any one of claims 1 to 12; and

a battery cell accommodated in the accommodation chamber;

and a sealing medium contained in the filling cavity.

14. The battery of claim 13, wherein the sealing medium comprises a sealing liquid.

15. An energy storage system, comprising:

a power generation device; and

a battery as claimed in claim 13 or 14, which is connected to the power generation device and is used to store electrical energy generated by the power generation device.