CN221041320U - Shell of energy storage device, capacitor and capacitive battery - Google Patents

Abstract

The embodiment of the utility model discloses a shell, a capacitor and a capacitor type battery of an energy storage device, and relates to the technical field of energy storage devices, wherein the shell of the energy storage device comprises a shell, and the shell comprises a sealing part, a containing part and an exhaust hole; the exhaust hole is arranged on the sealing part, and the sealing part is obliquely connected with the accommodating part. Has better containing effect, can be firmly connected with a thinner sealing layer, and further increases the energy density of the capacitor or the capacitive battery.

Description

Shell of energy storage device, capacitor and capacitive battery

Technical Field

The present utility model relates to the field of energy storage devices, and in particular, to a housing of an energy storage device, a capacitor and a capacitive battery.

Background

With the development of society, people's life is increasingly electronic and intelligent, and energy storage devices are becoming more important. At present, conventional lithium batteries are divided into steel-shell cylindrical batteries, square batteries and soft-pack batteries according to packaging modes. The cylindrical battery is widely used in electric vehicles, energy storage, digital and consumer products at present due to high standardization degree. The steel-shell cylindrical battery can be further classified into a steel-shell cylindrical battery, a steel-shell button battery and an aluminum-shell capacitor battery (the steel-shell cylindrical battery is commonly known in the industry, but other materials can be used as a shell, such as aluminum).

The difference between the capacitive cylindrical battery and the steel shell cylindrical battery is that: the steel shell battery is provided with a sealing layer with a complex structure (also called an explosion-proof valve, a complex explosion-proof structure formed by combining a plurality of materials and accessories); the capacitor battery adopts the capacitor structure to prepare, and changes a complex explosion-proof structure into a simple explosion-proof plug structure (a plastic rubber sleeve with two holes) and an explosion-proof indentation with a concave bottom (for example, a cross, Y-shaped and H-shaped explosion-proof groove).

The current batteries of these two cylindrical structures each have their own drawbacks: firstly, the steel shell battery can explode, and once the explosion-proof valve of the steel shell battery fails, the steel shell battery explodes and has high power; secondly, the explosion-proof structure of the steel shell battery is not waterproof; thirdly, the explosion-proof plug at the top of the capacitor battery at high and low temperatures easily leaks electrolyte and allows external air to enter the battery; fourth, when the capacitor battery is in internal short circuit, the packaged aluminum shell has a girdle sealing structure, so that the battery cannot be decompressed through the explosion-proof rubber plug at the top of the battery, but is exploded through the explosion-proof structure at the bottom of the battery, and the explosion of the battery is caused; fifth, the top rubber plug of the capacitor or the capacitive battery has poor waterproof property, and the thickness of the rubber plug occupies the volume of the capacitor or the capacitive battery, so that the energy density of the capacitor or the capacitive battery is low.

Disclosure of utility model

The embodiment of the utility model solves the problem that the energy density of the traditional capacitor or capacitive battery is reduced by sealing with the rubber plug.

In order to solve the above problems, an embodiment of the utility model discloses a housing of an energy storage device. Has better containing effect, can be firmly connected with a thinner sealing layer, and further increases the energy density of the capacitor or the capacitive battery.

In a first aspect, the present utility model provides a housing of an energy storage device, the housing of the energy storage device comprising a housing body, the housing comprising a sealing portion, a receiving portion, and an exhaust vent; the exhaust hole is arranged on the sealing part, and the sealing part is obliquely connected with the accommodating part.

The further technical scheme is that the shell of the energy storage device further comprises a sealing element, the sealing element is made of elastic materials, the sealing element is arranged in the sealing part, the sealing element is provided with a protruding part, and the protruding part is embedded into the exhaust hole.

The battery pack further comprises a core body, a first tab and a second tab, wherein the core body is arranged in the shell; the first tab is provided with a first clamping part, passes through the sealing piece and is connected with the core body; the second lug is provided with a second clamping part, penetrates through the sealing piece and is connected with the core body.

The sealing element is characterized by further comprising a first mark and a second mark, wherein the first mark and the second mark are arranged on the sealing element, the first mark is arranged around the first tab, and the second mark is arranged around the second tab.

The further technical scheme is that the shell of the energy storage device further comprises a fixing piece, the fixing piece is provided with a buffer air bag, and the fixing piece is connected with the sealing piece.

The casing still includes the depressed part, the depressed part respectively with sealing part and the holding portion is connected, the diameter of mounting is less than the internal diameter of sealing part, the diameter of mounting is less than the internal diameter of depressed part.

The further technical scheme is that the shell of the energy storage device further comprises a plurality of sealing pieces, the sealing pieces are arranged in the sealing portion in a stacked mode, the exhaust holes are arranged around the sealing portion in a surrounding mode, and a plurality of rows of the exhaust holes are arranged.

The sealing piece is further provided with a blocking head part, and the blocking head part is connected with the protruding part and is arranged on the groove.

In a second aspect, the utility model also provides a capacitor comprising a housing of an energy storage device according to any of the embodiments of the first aspect.

In a third aspect, the utility model also provides a capacitive battery comprising a housing of an energy storage device according to any of the embodiments of the first aspect.

Compared with the prior art, the technical effects achieved by the embodiment of the utility model include:

The rubber plug or the sealing piece is arranged in the sealing part, and the sealing part of the shell is obliquely connected with the accommodating part, so that the rubber plug or the sealing piece can be firmly limited in the shell, the rubber plug or the sealing piece is prevented from being ejected out by the air pressure rising in the shell of the energy storage device, the sealing part is reserved with the exhaust hole, and if the rubber plug or the sealing piece is deformed by the air pressure rising in the shell of the energy storage device, the shell is communicated with the outside through the exhaust hole, the air pressure in the shell of the energy storage device is further released, and the explosion phenomenon is avoided. When the shell of the energy storage device is applied to a capacitor or a capacitive battery, the rubber plug or the sealing piece arranged in the sealing part can use a thinner size, so that the energy density of the capacitor or the capacitive battery is effectively increased.

Drawings

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

Fig. 1 is a schematic structural diagram of a capacitive battery according to an embodiment of the present utility model;

fig. 2 is a schematic cross-sectional structure of a housing of an energy storage device according to an embodiment of the present utility model;

fig. 3 is a schematic cross-sectional structure of a housing of an energy storage device according to an embodiment of the present utility model;

fig. 4 is a schematic cross-sectional structure of a housing of an energy storage device according to an embodiment of the present utility model;

Fig. 5 is a schematic cross-sectional structure of a housing of an energy storage device according to an embodiment of the present utility model;

Fig. 6 is a schematic structural diagram of a housing of an energy storage device according to an embodiment of the present utility model;

fig. 7 is a schematic cross-sectional structure of a housing of an energy storage device according to an embodiment of the present utility model;

fig. 8 is a partial enlarged view of a cross-sectional structure of a housing of an energy storage device according to an embodiment of the present utility model;

fig. 9 is a top view of a housing of an energy storage device according to an embodiment of the present utility model;

Fig. 10 is a top view of a housing of an energy storage device according to an embodiment of the present utility model;

fig. 11 is a top view of a housing of an energy storage device according to an embodiment of the present utility model.

Reference numerals

The device comprises a shell 1, a sealing element 2, a sealing part 11, an exhaust hole 12, a containing part 13, a fixing element 3, a buffer air bag 31, a concave part 16, a first mark 41, a second mark 42, a core 5, a first tab 6, a first clamping part 61, a second tab 9, a second clamping part 91, a convex part 71, a blocking head 72 and a groove 8.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, in which like reference numerals represent like components. It will be apparent that the embodiments described below are only some, but not all, embodiments of the 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.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the utility model. As used in the specification of the embodiments of the utility model and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1-11, an embodiment of the present utility model provides a housing for an energy storage device. The housing of the energy storage device comprises a housing 1 body. The specific description of each component is as follows:

In this embodiment, the housing 1 includes a sealing portion 11, a receiving portion 13, and an exhaust hole 12; the exhaust hole 12 is provided in the sealing portion 11, and the sealing portion 11 is connected to the accommodating portion 13 in an inclined manner.

The rubber plug or the sealing element is arranged in the sealing part 11, and the sealing part 11 of the shell 1 is obliquely connected with the accommodating part 13, so that the rubber plug or the sealing element can be firmly limited in the shell 1, the rubber plug or the sealing element is prevented from being ejected out by the air pressure increase in the shell of the energy storage device, the exhaust hole 12 is reserved in the sealing part 11, and if the rubber plug or the sealing element is deformed by the air pressure increase in the shell of the energy storage device, the shell 1 is communicated with the outside through the exhaust hole 12, the air pressure in the shell of the energy storage device is further released, and the explosion phenomenon is avoided. When the shell of the energy storage device is applied to a capacitor or a capacitive battery, the rubber plug or the sealing piece arranged in the sealing part can use a thinner size, so that the energy density of the capacitor or the capacitive battery is effectively increased.

In an embodiment, the sealing element 2 is made of an elastic material, the sealing element 2 is arranged in the sealing part 11, the sealing element 2 is provided with a protruding part 71, and the protruding part 71 is embedded in the exhaust hole 12.

Specifically, the sealing portion 11 refers to a part of the housing 1 on the housing 1, and the sealing portion 11 of the housing 1 is provided with a plurality of exhaust holes 12, and all the exhaust holes 12 are provided around the seal 2. The sealing element 2 is made of elastic materials obtained by liquid pouring and waiting solidification, and has the characteristic of deformation when external force is applied to the sealing element. When the liquid is poured, the liquid fills the vent hole 12, and the sealing element 2 filled in the vent hole 12 after solidification is the protruding part 71 of the sealing element 2. The thickness of the seal 2 is typically less than 1mm, and a thinner package structure allows for higher energy density of the capacitor or capacitive cell as compared to conventional explosion-proof valves.

In a conventional state, the sealing member 2 closely contacts the inner wall of the housing 1, thereby blocking the communication of the exhaust hole 12 with the inside of the housing 1. When the air pressure in the shell 1 is increased, after the air pressure generated by the air pressure on the sealing element 2 reaches the deformation force threshold of the sealing element 2, the sealing element 2 deforms so that a gap exists between the sealing element 2 and the inner wall of the shell 1, and a gap exists between the sealing element 2 and the inner wall of the exhaust hole 12, so that air can be discharged to the outside from the inside of the shell 1 through the exhaust hole 12 through the gap, and the effect of air leakage and pressure reduction in the shell 1 is realized. In an embodiment, the magnitude of the deformation force threshold of the seal 2 may be influenced by the thickness of the seal 2, the higher the thickness of the seal 2, the greater the deformation force threshold of the seal 2; the lower the thickness of the seal 2, the smaller the deformation force threshold of the seal 2.

The working process of the shell of the energy storage device is as follows:

the inside of the shell 1 is provided with a preset air release device, the air release device releases air, so that the air pressure in the shell 1 is increased, the air pressure generated by the air pressure on the sealing element 2 is increased along with the increase of the air pressure, when the air pressure generated by the air pressure on the sealing element 2 does not reach the deformation force threshold of the sealing element 2, the sealing element 2 blocks the communication between the air exhaust hole 12 and the inside of the shell 1, and the outside of the air in the shell 1 can be ensured not to leak; when the air release device abnormally releases a large amount of air, the air pressure generated by the air pressure on the sealing element 2 reaches the deformation force threshold value of the sealing element 2, the sealing element 2 deforms so that a gap exists between the sealing element 2 and the inner wall of the shell 1, the gap exists between the sealing element 2 and the inner wall of the exhaust hole 12, and the air can be discharged to the outside from the inside of the shell 1 through the exhaust hole 12 through the gap, so that the effect of air release and pressure reduction in the inside of the shell 1 is realized.

The air hole is reserved in the shell 1, the elastic deformation capability of the sealing element 2 is utilized, when the air pressure in the shell 1 is increased, and after the air pressure of the air pressure on the sealing element 2 reaches the deformation threshold of the sealing element 2, the sealing element 2 deforms so that the air hole is communicated with the interior of the shell 1, and then the air is released to realize pressure relief; or, when the inside atmospheric pressure of casing 1 increases sharply, the atmospheric pressure of atmospheric pressure to sealing member 2 surpasss the deformation power threshold value of sealing member 2 in the twinkling of an eye, and sealing member 2 can be toward the opening part deformation protrusion of casing 1 to at the in-process of sealing member 2 deformation protrusion, gas pocket and the inside intercommunication of casing 1, and then release gas realizes the pressure release, avoids sealing member 2 to pop out. The explosion phenomenon caused by the increase of the air pressure in the shell 1 is effectively avoided. The sealing member 2 has a simpler structure than a conventional explosion-proof structure, and the shell of the energy storage device has good explosion resistance, can be applied to capacitors and capacitive batteries, and can prevent explosion caused by short circuit of the capacitors or the capacitive batteries of the shell of the energy storage device compared with the capacitors and the capacitive batteries which are conventionally provided with explosion-proof valves, and the cost of the explosion-proof valves can be saved to reduce the manufacturing cost of the capacitors or the capacitive batteries. The shell 1, the sealing piece 2, the exhaust hole 12 and the sealing part 11 can be applied to a capacitor or a capacitive battery, so that the capacitor or the capacitive battery has good sealing property and explosion resistance, and compared with a traditional explosion-proof valve, the explosion-proof valve has no explosion after failure, and the cost of the explosion-proof valve can be saved to reduce the manufacturing cost of the capacitor or the capacitive battery.

Further, the device further comprises a core body 5, a first tab 6 and a second tab 9, wherein the core body 5 is arranged in the shell 1, the first tab 6 is provided with a first clamping part 61, and the first tab 6 passes through the sealing piece 2 and is connected with the core body 5; the second lug 9 is provided with a second clamping portion 91, and the second lug 9 passes through the sealing member 2 and is connected with the core 5.

Specifically, the core 5 is disposed in the accommodating portion 13 of the housing 1, the core 5 performs a chemical reaction to release gas, and the housing of the energy storage device can effectively avoid explosion caused by a large amount of gas generated when the core 5 is short-circuited. The first tab 6 refers to a positive electrode for connection with the core 5, the second tab 9 refers to a negative electrode for connection with the core 5, in an embodiment, the first tab 6 includes a positive electrode lead and a negative electrode lead of a capacitor or a capacitive battery, wherein the first tab 6 passes through the sealing member 2 to be connected with the core 5, the first clamping portion 61 is disposed at a portion of the first tab 6 which does not pass through the sealing member 2, and the clamping portion 61 of the first tab 6 is used for limiting the position of the sealing member 2 in the housing 1; the second lug 9 passes through the sealing element 2 and is connected with the core body 5, the second clamping part 91 is arranged at the part of the second lug 9 which does not pass through the sealing element 2, and the second clamping part 91 of the second lug 9 is used for limiting the position of the sealing element 2 in the shell 1 to avoid the damage to the outside caused by the ejection of the sealing element 2 when a large amount of gas is generated when the core body 5 is in short circuit. In an embodiment, the shape of the first clamping portion 61 includes any one or more of an S-shaped structure, an L-shaped structure, and a loop-shaped structure, which is used to increase the contact area between the sealing member 2 and the first tab 6 and the second tab 9, further fix the position of the sealing member 2 in the housing 1, and improve the tightness and the firmness.

Further, the sealing element further comprises a first mark 41 and a second mark 42, the first mark 41 and the second mark 42 are arranged on the sealing element 2, the first mark 41 is arranged around the first tab 6, and the second mark 42 is arranged around the second tab 9.

Specifically, the surface of the sealing member 2 may be coated with a color, the first mark 41 and the second mark 42 are respectively an area on the sealing member 2, in an embodiment, the housing of the energy storage device is applied to a capacitor or a capacitive battery, the first mark 41 is red, the first mark 41 is arranged on the sealing member 2 and surrounds the periphery of the first tab 6, the second mark 42 is black, and the second mark 42 is arranged on the sealing member 2 and surrounds the periphery of the second tab 9, so as to distinguish the positive electrode and the negative electrode of the capacitor or the capacitive battery. Referring to fig. 9-11, the first indicia 41 and the second indicia 42 may be configured to distinguish between the first tab 6 and the second tab 9 by any one or more of a different shape, size, and color.

In this embodiment, the housing 1 further includes a receiving portion 13, the sealing portion 11 is obliquely connected to the receiving portion 13, and the sealing portion 11 is connected to the corner receiving portion 17.

The corner 17 is a region of the housing 1, which is formed by stamping a part of the housing 1, and it should be noted that the stamping process is specifically determined by referring to the existing information, and the present utility model is not particularly limited to this, and is used to narrow the opening of the housing 1 and prevent the seal member 2 from coming out from the opening of the housing 1. The housing 13 is a part of the casing 1 surrounding the area to be obtained for the placement of the preset deflation means. When the sealing part 11 is in straight connection with the accommodating part 13, the sealing part 2 cannot rebound after being deformed, so that the housing of the energy storage device cannot recover the sealing effect after the deformation of the sealing part 2. When the sealing part 11 is connected with the accommodating part 13 in an inclined manner, under the action of the inclined inner wall of the shell 1, the sealing part 2 can rebound to a state before deformation after deformation, namely, the sealing part 2 is closely attached to the inner wall of the shell 1, the sealing part 2 is closely attached to the inner wall of the exhaust hole 12, and the exhaust hole 12 is blocked from communicating with the inside of the shell of the energy storage device.

The inner diameter of the sealing part 11 close to one end of the accommodating part 13 is equal to the inner diameter of the accommodating part 13, and the inner diameter of the sealing part 11 gradually decreases from one end close to the accommodating part 13 to one end far away from the accommodating part 13, so that a structure with a narrow upper part and a wide lower part of the sealing part 11 is obtained, namely the sealing part 11 is obliquely connected with the accommodating part 13, on one hand, the sealing element 2 can be effectively ensured not to be separated from the inside of the shell 1 in the normal state, and the tightness of the shell of the energy storage device is improved; on the other hand, the included angle between the inner wall of the sealing part 11 and the inner wall of the accommodating part 13 can be changed to adjust the deformation force threshold of the sealing member 2, wherein the larger the included angle between the inner wall of the sealing part and the inner wall of the accommodating part 13 is, the lower the deformation force threshold of the sealing member 2 is, and the smaller the included angle between the inner wall of the sealing part and the inner wall of the accommodating part 13 is, the higher the deformation force threshold of the sealing member 2 is.

Further, the housing of the energy storage device further comprises a fixing member 3, the fixing member 3 is provided with a buffer airbag 31, and the fixing member 3 is connected with the sealing member 2.

Specifically, the fixing piece 3 is made of hard materials, the buffer air bag 31 on the fixing piece 3 is used for increasing the inner space of the shell of the energy storage device, effectively increasing the volume of the stored gas in the shell 1, reducing the pressure generated by the same gas due to the increase of the volume, and effectively prolonging the service life of the sealing piece 2.

Further, the housing 1 further includes a recess 16, and the recess 16 is connected to the sealing portion 11 and the accommodating portion 13, respectively.

In particular, the housing 1 may be punched to obtain a recess 16, by means of which recess 16 the seal 2 is further reinforced in the seal 11, the recess 16 also serving in one embodiment for connection with the fixture 3.

Further, the diameter of the fixing member 3 is smaller than the inner diameter of the sealing portion, and the diameter of the fixing member 3 is smaller than the inner diameter of the recess portion 16.

Specifically, the fixing member 3 is used for supporting and connecting the sealing member 2, and the sealing member 2 needs to be deformed to achieve the explosion-proof effect, and typically, the diameter of the fixing member 3 is 5% smaller than the minimum inner diameter of the housing 1, and in an embodiment, the minimum inner diameter of the housing 1 refers to the inner diameter of the sealing portion, or the minimum inner diameter of the housing 1 refers to the inner diameter of the recess portion 16 of the housing 1. The diameter of the fixing piece 3 is smaller than the minimum inner diameter of the shell 1, so that the sealing piece 2 is deformed, and finally, the explosion-proof effect is achieved.

In an embodiment, the casing 1 is provided with the recess 16, the sealing part 11 is connected with the accommodating part 13 in an inclined manner, when the sealing part 11 is connected with the accommodating part 13 in an inclined manner, under the action of the inclined inner wall of the casing 1, the sealing part 2 can rebound to a state before deformation after deformation, that is, the sealing part 2 is closely attached to the inner wall of the casing 1, the sealing part 2 is closely attached to the inner wall of the exhaust hole 12, the communication between the exhaust hole 12 and the inside of the casing of the energy storage device is blocked, and the recess 16 can effectively reinforce the sealing part 2 in the sealing part 11, so that the sealing part 2 can rebound in time after deformation, that is, the effect of the one-way valve with the self-repairing structure is obtained.

Further, the housing of the energy storage device further includes a plurality of sealing members 2, and the plurality of sealing members 2 are stacked in the sealing portion 11.

Specifically, the housing of the energy storage device includes a multi-layer structure formed by stacking a plurality of sealing members 2, and in an embodiment, the housing of the energy storage device is formed by stacking sealing members 2 with different sizes, so that the sealing members 2 are more attached to the inner wall of the housing 1, and the tightness is improved.

Further, the exhaust holes 12 are provided around the sealing portion 11, and are provided in a plurality of rows.

Specifically, the exhaust hole 12 is formed by punching the housing 1, and it should be noted that the punching process can be specifically determined by referring to the existing data, and the present utility model is not particularly limited thereto. The exhaust holes 12 are arranged at equal intervals on the sealing part 11, in one embodiment, the sealing part 11 is provided with two rows of exhaust holes 12, and a plurality of sealing members 2 are stacked in the sealing part 11, so that each layer of sealing members 2 respectively blocks each row of exhaust holes 12 in a normal state.

In an embodiment, the sealing element 2 and the fixing element 3 are made of different materials, wherein one surface of the sealing element 2 is used for contacting with the outside, and can be coated with wear-resistant materials to achieve the wear-resistant effect; the fixing member 3 is used for supporting and connecting the sealing member 2 and the core 5, and is made of a material with hardness of more than 60 HRC; the buffer airbag 31 of the fixing member 3 is used for relieving the expansion of the gas generated by the operation of the preset air release device, the gas can enter the gap between the sealing member 2 and the fixing member 3, the expansion of the gas generated by the operation of the preset air release device can be further relieved, in one embodiment, the shell of the energy storage device is applied to the capacitor or the capacitor battery, the expansion of the gas in the capacitor or the capacitor battery can be relieved, the air pressure is reduced, the air pressure in the capacitor or the capacitor battery is reduced, the resistance of the core body 5 is reduced, and the shell of the obtained energy storage device has the effect of lower internal resistance.

Further, the housing of the energy storage device further includes a groove 8, the groove 8 surrounds the periphery of the exhaust hole 12, the sealing member 2 is further provided with a plug portion 72, and the plug portion 72 is connected with the protruding portion 71 and is disposed on the groove 8.

Specifically, the number of grooves 8 is equal to the number of the exhaust holes 12, and the grooves are provided outside the sealing portion 11 so as to surround the exhaust holes 12. The seal plug 72 is connected to the seal boss 71. It will be appreciated that the seal 2 disposed in the vent hole 12 is a boss and the seal 2 disposed in the recess 8 is a plug. The sealing element 2 is additionally provided with the plug part 72, so that the connection firmness of the sealing element 2 and the shell 1 can be greatly improved, the sealing element 2 is prevented from being separated from the shell 1, and meanwhile, the sealing element is additionally provided with the groove 8 for placing the plug part 72, so that the connection between the sealing part 11 and the plug part 72 is smoother and more attractive.

In one embodiment, the inclination angle between the sealing part 11 and the accommodating part 13 is 135 ° -179 °.

Specifically, the inclination angle of the sealing portion 11 and the accommodating portion 13 refers to an included angle a formed by the inner wall of the sealing portion 11 and the inner wall of the accommodating portion 13, in an embodiment, the value range of the included angle a is 135 ° -179 ° to effectively ensure that the sealing member 2 has a rebound effect, wherein the magnitude of the included angle a affects the rebound frequency of the sealing member 2, and when the larger the angle of the included angle a is, the smaller the rebound frequency of the sealing member 2 is; the smaller the angle of included angle a, the more the seal 2 rebounds.

In an embodiment, the coefficient of thermal expansion and contraction of the sealing member 2 of the housing of the energy storage device is equal to the coefficient of thermal expansion and contraction of the core 5.

Specifically, the coefficient of thermal expansion and contraction refers to the thermal expansion and contraction performance of the material, and the coefficient of thermal expansion and contraction of the sealing member 2 can be adjusted to be equal to the coefficient of thermal expansion and contraction of the core body 5, so that the sealing member 2 and the core body 5 have the same thermal expansion and contraction performance at different temperatures, and the safety of the shell of the energy storage device is improved.

The capacitor or the capacitive battery provided by the embodiment of the utility model has the following beneficial effects:

Firstly, the sealing function and the sealing layer play the most important role in isolating the inside and the outside of the battery, and the sealing layer of the capacitor or the capacitor battery must have good sealing property because the electrolyte in the capacitor or the capacitor battery is easy to react with moisture and oxygen in the air; secondly, the explosion-proof effect, because of the energy storage devices such as a capacitor or a capacitive battery, a large amount of energy is stored in the device, high voltage can be generated in the device when the device is in short circuit, and the metal shell 1 is used for sealing the battery, so that the sealing layer needs to have the explosion-proof pressure release effect. The traditional steel shell energy storage device has complex shell sealing explosion-proof structure and high price, and the capacitive battery is sealed in the form of a beam waist and a rubber plug, so that electrolyte is easy to leak at high temperature, and explosion can occur when short circuit occurs. The present application therefore proposes a housing for an energy storage device with a self-repairing structure of the one-way valve (i.e. seal 2) to improve the safety and waterproofing of the capacitor or capacitive cell.

In an embodiment, the embodiment of the present utility model further provides a capacitor, including a housing of the energy storage device according to any one of the embodiments above.

Specifically, the capacitor includes an aluminum electrolytic capacitor and a super capacitor, and it should be noted that, in this embodiment, the casing of the capacitor may be implemented by using the casing 1 described in any one of the foregoing embodiments, which does not exceed the protection scope of the present utility model.

In an embodiment, the present disclosure further provides a capacitive battery, including a housing of the energy storage device according to any one of the embodiments above.

Specifically, the capacitive battery refers to a structure using an aluminum electrolytic capacitor, and it should be noted that, in this embodiment, the housing of the capacitive battery may be implemented by using the housing 1 described in any of the foregoing embodiments, which does not exceed the protection scope of the present utility model.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be attached, detached, or integrated, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (8)

1. The shell of the energy storage device is characterized by comprising a shell body, a sealing piece, a first tab, a second tab, a first mark and a second mark, wherein the shell comprises a sealing part, a containing part and an exhaust hole; the exhaust hole is arranged on the sealing part, and the sealing part is obliquely connected with the accommodating part;

The sealing element is made of elastic materials, the sealing element is arranged in the sealing part, the sealing element is provided with a protruding part, the protruding part is embedded into the exhaust hole, the first tab penetrates through the sealing element, and the second tab penetrates through the sealing element;

The first mark and the second mark are arranged on the sealing piece, the first mark is arranged around the first tab, and the second mark is arranged around the second tab.

2. The housing of an energy storage device of claim 1, further comprising a core disposed within said housing; the first tab is provided with a first clamping part and is connected with the core body; the second lug is provided with a second clamping part and is connected with the core body.

3. The housing of an energy storage device of claim 1, further comprising a securing member, the securing member having a cushion bladder, the securing member being coupled to the sealing member.

4. A housing for an energy storage device as defined in claim 3, further comprising a recess connected to said seal and said receptacle, respectively, said securing member having a diameter smaller than an inner diameter of said seal and a diameter smaller than an inner diameter of said recess.

5. The housing of an energy storage device of claim 1, further comprising a plurality of seals, wherein a plurality of the seals are stacked within the seal, wherein the vent holes are disposed around the seal and are disposed in a plurality of rows.

6. The housing of an energy storage device of claim 1, further comprising a groove surrounding the vent hole, wherein the seal is further provided with a plug portion connected to the boss and disposed on the groove.

7. A capacitor comprising a housing of an energy storage device according to any one of claims 1-6.

8. A capacitive cell comprising a housing of an energy storage device according to any one of claims 1-6.