CN221928320U

CN221928320U - End cover assembly, energy storage device and electric equipment

Info

Publication number: CN221928320U
Application number: CN202323570211.2U
Authority: CN
Inventors: 张倩
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-10-29
Anticipated expiration: 2033-12-26

Abstract

The utility model relates to the technical field of energy storage, and discloses an end cover assembly, an energy storage device and electric equipment, wherein the end cover assembly comprises a cover body and a top patch, the cover body is provided with a first surface, the first surface is provided with a first matching part, the top patch is provided with a third surface, the third surface is attached to the first surface, the second matching part is arranged on the third surface, one of the first matching part and the second matching part is of a convex structure, the other one of the first matching part and the second matching part is of a concave structure, and the convex structure is embedded in the concave structure. By adopting the end cover assembly, the energy storage device and the electric equipment, the top patch is tightly adhered to the cover body, so that the top patch can be prevented from tilting, the risk of short circuit of the energy storage device is reduced, and the preparation yield of the energy storage device is high.

Description

End cover assembly, energy storage device and electric equipment

Technical Field

The utility model relates to the technical field of energy storage, in particular to an end cover assembly, an energy storage device and electric equipment.

Background

In the related art, the surface of the energy storage device is generally covered with an insulating protective film to prevent the energy storage device from being shorted and to protect the energy storage device. In addition, a layer of top patch is adhered to the top cover of the energy storage device, and the top patch is also used for insulation and protection.

However, because the thickness of protection film influences the laminating of top paster and top cap to a certain extent, the perk takes place for the top paster easily, and the insulating effect of top paster is relatively poor, and energy storage device appears the short circuit easily and causes, and energy storage device's preparation yield is lower.

Disclosure of utility model

The embodiment of the utility model discloses an end cover assembly, an energy storage device and electric equipment, wherein a top patch is tightly adhered to a cover body, so that the top patch can be prevented from tilting, the risk of short circuit of the energy storage device is reduced, and the preparation yield of the energy storage device is high.

In a first aspect, an embodiment of the present utility model discloses an end cap assembly, including a cover body and a top patch, where the cover body has a first surface and a second surface opposite to each other, the first surface is provided with a first mating portion, the first mating portion is configured into a ring shape, the cover body is provided with a first pole through hole and a second pole through hole penetrating through the first surface and the second surface, the first pole through hole and the second pole through hole are arranged at intervals, projection on the first surface is provided, the first pole through hole and the second pole through hole are located in the first mating portion, the top patch has a third surface and a fourth surface opposite to each other, the third surface is attached to the first surface, the third surface is provided with a second mating portion, one of the first mating portion and the second mating portion is a protruding structure, the other of the first mating portion and the second mating portion is a recessed structure, the protruding structure is embedded in the recessed structure, projection on the top is provided with a third pole through hole and a fourth pole through hole corresponding to the third pole through hole and the third pole through hole.

As an alternative implementation manner, in an embodiment of the present utility model, the cover body is further provided with a first explosion-proof valve through hole penetrating through the first surface and the second surface, the first explosion-proof valve through hole is located between the first post through hole and the second post through hole, the first mating part includes a first annular portion, a first extension portion and a second extension portion, the first annular portion is configured in a ring shape, the first post through hole and the second post through hole are located in the first annular portion, two ends of the first extension portion are connected to the first annular portion, the first extension portion is located between the first post through hole and the first explosion-proof valve through hole, two ends of the second extension portion are connected to the first annular portion, and the second extension portion is located between the second post through hole and the first explosion-proof valve through hole;

The top patch is further provided with a second explosion-proof valve through hole penetrating through the third surface and the fourth surface, the second explosion-proof valve through hole is located between the third pole through hole and the fourth pole through hole, the second matching part comprises a second annular portion, a third extending portion and a fourth extending portion, the second annular portion is configured into an annular shape, the third pole through hole and the fourth pole through hole are located in the second annular portion in a projection mode of the third surface, two ends of the third extending portion are connected to the second annular portion, the third extending portion is located between the third pole through hole and the second explosion-proof valve through hole, two ends of the fourth extending portion are connected to the second annular portion, and the fourth extending portion is located between the fourth pole through hole and the second explosion-proof valve through hole.

As an optional implementation manner, in an embodiment of the present utility model, the first mating portion is a convex structure formed by bending the cover portion, the second mating portion is a concave structure formed by bending the top patch portion, or the first mating portion is a concave structure formed by bending the cover portion, and the second mating portion is a convex structure formed by bending the top patch portion.

As an optional implementation manner, in an embodiment of the present utility model, the first mating portion is a protruding structure protruding from the first surface, the second mating portion is a recessed structure recessed from the third surface, or the first mating portion is a recessed structure recessed from the first surface, and the second mating portion is a protruding structure protruding from the third surface.

In an optional implementation manner, in an embodiment of the present utility model, the cover body is further provided with a reinforcing rib, the reinforcing rib is located on a surface of one side of the cover body, which is away from the first surface, and the reinforcing rib is disposed corresponding to the first matching portion.

In an optional embodiment of the present utility model, the first mating portion is a concave structure, the second mating portion is a convex structure, and the cover portion is bent in a direction away from the first surface, so as to form the first mating portion on the first surface, and the reinforcing rib is formed on a surface of the cover, which is away from the first surface.

As an optional implementation manner, in an embodiment of the present utility model, the first mating portion is a concave structure, the second mating portion is a convex structure, the first surface is further provided with a concave portion, the concave portion penetrates through a peripheral side surface of the cover body, and the concave portion is communicated with the first mating portion.

In an optional implementation manner, in an embodiment of the present utility model, the first surface is provided with four concave portions, the four concave portions are respectively disposed in a one-to-one correspondence with four corners of the cover body, and each concave portion penetrates through two adjacent side surfaces corresponding to each corner of the cover body.

In a second aspect, an embodiment of the present utility model discloses an energy storage device, including a bottom shell, a protective film, and an end cover assembly of the first aspect, where the cover is covered and connected to the bottom shell, the protective film includes a main body portion and a bending portion, the main body portion is wrapped on the bottom shell, the bending portion extends from the main body portion to the cover, the bending portion is wrapped on a portion of the first surface of the cover, and the third surface of the top patch is further attached to a side of the bending portion facing away from the first surface.

In an optional implementation manner, in an embodiment of the present utility model, the first matching portion is a concave structure, the second matching portion is a convex structure, the first surface is further provided with four concave portions, the four concave portions are respectively disposed in one-to-one correspondence with four corners of the cover body, each concave portion penetrates through two adjacent side surfaces corresponding to each corner of the cover body, the concave portions are communicated with the first matching portion, the bending portion is configured into a ring shape, each bending portion is provided with a fold structure corresponding to each of four corners of the cover body, and the four fold structures are respectively accommodated in the four concave portions one-to-one.

In a third aspect, an embodiment of the present utility model discloses an electric device, including the energy storage device of the second aspect, where the energy storage device is configured to supply power to the electric device.

Compared with the prior art, the embodiment of the utility model has at least the following beneficial effects:

in the embodiment of the utility model, the first matching part is arranged on the first surface of the cover body, the second matching part is arranged on the third surface of the top patch, the third surface is attached to the first surface, and meanwhile, the second matching part and the first matching part can be mutually embedded through the convex structure and the concave structure, so that the attaching area of the top patch and the cover body is increased, the top patch is tightly attached to the cover body, the tilting of the top patch can be avoided, the risk of short circuit of the energy storage device is reduced, and the preparation yield of the energy storage device is higher.

Moreover, through constructing first mating part into the ring shape, and first mating part encircles first utmost point post through-hole and second utmost point post through-hole setting, first mating part can laminate the profile of lid in a large scale, simultaneously construct the ring shape with second mating part, and second mating part encircles third utmost point post through-hole and fourth utmost point post through-hole setting, the profile of top paster can laminate in a large scale, inlay each other through second mating part and first mating part and establish, can further improve the cohesion that lid and top paster laminate, avoid the top paster to peel off the lid and lead to the condition emergence of top paster perk.

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 will be briefly described below, and it is obvious that the drawings in the following description are only 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 illustration of an end cap assembly according to one embodiment of the present disclosure;

FIG. 2 is a schematic illustration of an exploded construction of an end cap assembly according to one embodiment of the present disclosure;

FIG. 3 is an exploded view of an end cap assembly from another perspective in accordance with one disclosed embodiment of the utility model;

FIG. 4 is an enlarged schematic view of the structure at I in FIG. 1;

fig. 5 is a schematic structural diagram of an energy storage device according to a second embodiment of the present utility model;

Fig. 6 is an exploded view of an energy storage device according to a second embodiment of the present utility model;

FIG. 7 is an enlarged schematic view of the structure at II in FIG. 6;

FIG. 8 is a schematic diagram of a powered device according to a third embodiment of the present utility model;

fig. 9 is a schematic structural diagram of an energy storage system according to a fourth embodiment of the present utility model.

Description of the main reference numerals

100. An end cap assembly; 100a, gap; 10. a cover body; 10a, a first surface; 10b, a second surface; 11. a first mating portion; 11a, a first annular portion; 11b, a first extension; 11c, a second extension; 12. a first post via; 13. a second post via; 14. a first explosion-proof valve through hole; 15. reinforcing ribs; 16. a recessed portion; 20. a top patch; 20a, a third surface; 20b, a fourth surface; 21. a second mating portion; 21a, a second annular portion; 21b, a third extension; 21c, a fourth extension; 22. a third pole through hole; 23. a fourth post through hole; 24. a second explosion-proof valve through hole; 200. an energy storage device; 201. a bottom case; 202. a protective film; 2021. a main body portion; 2022. a bending part; 2022a, pleated structure; 300. an electric device; 400. an energy storage system; 410. a high voltage cable; 420. a first electric energy conversion device; 430. and a second power conversion device.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. 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.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The utility model discloses an end cover assembly, an energy storage device and electric equipment, wherein a top patch is tightly adhered to a cover body, so that the top patch can be prevented from tilting, the risk of short circuit of the energy storage device is reduced, and the preparation yield of the energy storage device is high.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Because of the strong timeliness and space properties of energy required by people, in order to reasonably utilize the energy and improve the utilization rate of the energy, one energy form needs to be stored by one medium or equipment and then converted into another energy form, and the energy is released in a specific energy form based on future application. At present, the main way of generating green electric energy is to develop green energy sources such as photovoltaics, wind power and the like to replace fossil energy sources, the generation of the green electric energy at present generally depends on photovoltaics, wind power, water potential and the like, and wind energy, solar energy and the like generally have the problems of strong intermittence and large fluctuation, which can cause unstable power grid, insufficient peak electricity consumption, too much electricity consumption in valley, unstable voltage also can cause damage to the power, so that the problem of 'wind abandoning and light abandoning' is possibly caused by insufficient electricity consumption requirement or insufficient power grid acceptance, and the problem needs to be solved by relying on energy storage. The energy is converted into other forms of energy through physical or chemical means and is stored, the energy is converted into electric energy when needed and released, in short, the energy storage is similar to a large-scale 'charge pal', the electric energy is stored when the photovoltaic and wind energy are sufficient, and the stored electric power is released when needed.

Taking electrochemical energy storage as an example, the scheme provides an energy storage device, wherein a group of chemical batteries are arranged in the energy storage device, chemical elements in the batteries are mainly used as energy storage media, and the charge and discharge process is accompanied with chemical reaction or change of the energy storage media.

The present energy storage (i.e. energy storage) application scenario is comparatively extensive, including aspects such as power generation side energy storage, electric wire netting side energy storage and power consumption side energy storage, and the kind of corresponding energy storage device includes:

(1) The large energy storage power station applied to the wind power and photovoltaic power station side can assist renewable energy sources to generate electricity to meet grid-connected requirements, and meanwhile, the utilization rate of the renewable energy sources is improved; the energy storage power station is used as a high-quality active/reactive power regulating power supply in a power supply side, so that the load matching of electric energy in time and space is realized, the capacity of absorbing renewable energy sources is enhanced, the instantaneous power change is reduced, the impact on a power grid is reduced, the problem of generating and absorbing new energy sources is solved, and the energy storage power station has great significance in the aspects of standby of a power grid system, relieving peak load power supply pressure and peak regulation and frequency modulation;

(2) The energy storage container applied to the power grid side has the functions of mainly peak regulation, frequency modulation and power grid blocking and peak regulation relieving, and can realize peak clipping and valley filling of the power consumption load, namely the energy storage battery is charged when the power consumption load is low, and the stored electric quantity is released in the peak period of the power consumption load, so that the balance between power production and power consumption is realized;

(3) The small energy storage cabinet applied to the electricity utilization side has the main functions of spontaneous electricity utilization, peak Gu Jiacha arbitrage, capacity cost management and power supply reliability improvement. According to the different application scenes, the electricity-side energy storage can be divided into an industrial and commercial energy storage cabinet, a household energy storage device, an energy storage charging pile and the like, and is generally matched with the distributed photovoltaic. The energy storage can be used by industrial and commercial users for valley peak price difference arbitrage and capacity cost management. In the electric power market implementing peak-valley electricity price, the energy storage system is charged when the electricity price is low, and the energy storage system is discharged when the electricity price is high, so that peak-valley electricity price difference arbitrage is realized, and the electricity cost is reduced. In addition, the energy storage system is suitable for two industrial enterprises with electricity price, can store energy when electricity is used in low valley and discharge the energy when the electricity is used in peak load, so that peak power and the declared maximum demand are reduced, and the purpose of reducing the capacity electricity fee is achieved. The household photovoltaic distribution and storage can improve the spontaneous self-use level of the electric power. Due to high electricity prices and poor power supply stability, the photovoltaic installation requirements of users are pulled. Considering that the photovoltaic power generation is performed in daytime, and the load of a user is generally higher at night, the photovoltaic power can be better utilized through configuration of energy storage, the spontaneous self-use level is improved, and meanwhile the power consumption cost is reduced. In addition, the fields of communication base stations, data centers and the like need to be configured with energy storage for standby power.

Example 1

Referring to fig. 1 to 3 together, a schematic structural diagram of an end cap assembly 100 according to an embodiment of the utility model is provided, the end cap assembly 100 includes a cap body 10 and a top patch 20, the cap body 10 has a first surface 10a, the first surface 10a is provided with a first mating portion 11, the top patch 20 has a third surface 20a, the third surface 20a is attached to the first surface 10a, the third surface 20a is provided with a second mating portion 21, one of the first mating portion 11 and the second mating portion 21 is a convex structure, the other one of the first mating portion 11 and the second mating portion 21 is a concave structure, and the convex structure is embedded in the concave structure.

In actual production operation, since the protective film of the energy storage device has a certain thickness, after the top patch 20 is attached to the cover body 10, a part of the protective film located between the top patch 20 and the cover body 10 is easy to push the top patch 20 away from the cover body 10, especially at four corners of the top patch 20, a part of the protective film allowance is left in the cover body 10 due to the film wrapping tolerance of the protective film, the part of the protective film allowance is usually folded at four corners of the cover body 10 to form a fold structure, after the protective film is folded, the folded corner is easy to be tilted up, and the tilted up folded corner is easy to be tilted up together with the top patch 20.

Therefore, in this embodiment, the first surface 10a of the cover body 10 is provided with the first matching portion 11, the third surface 20a of the top patch 20 is provided with the second matching portion 21, the third surface 20a is attached to the first surface 10a, meanwhile, the second matching portion 21 and the first matching portion 11 are embedded with each other through the convex structure and the concave structure, the attaching area of the top patch 20 and the cover body 10 is increased, the top patch 20 and the cover body 10 are attached tightly, the tilting of the top patch 20 can be avoided, the risk of short circuit of the energy storage device is reduced, and the preparation yield of the energy storage device is high.

In some embodiments, as shown in fig. 2 and 3, the cover 10 further has a second surface 10b opposite to the first surface 10a, the cover 10 is provided with a first post through hole 12 and a second post through hole 13 penetrating the first surface 10a and the second surface 10b, the first post through hole 12 and the second post through hole 13 are spaced apart, the first fitting portion 11 is configured in a ring shape, a projection on the first surface 10a, the first post through hole 12 and the second post through hole 13 are located in the first fitting portion 11, the top patch 20 further has a fourth surface 20b opposite to the third surface 20a, the top patch 20 is provided with a third post through hole 22 and a fourth post through hole 23 penetrating the third surface 20a and the fourth surface 20b, the third post through hole 22 and the fourth post through hole 23 are disposed corresponding to the first post through hole 12 and the second post through hole 13, respectively, a projection on the third surface 20a, and the third post through hole 22 and the fourth post through hole 23 are located in the second fitting portion 21. Thus, by configuring the first engaging portion 11 in the ring shape, and the first engaging portion 11 is disposed around the first post through hole 12 and the second post through hole 13, the first engaging portion 11 can fit the outline of the cover 10 in a larger range, and simultaneously configuring the second engaging portion 21 in the ring shape, and the second engaging portion 21 is disposed around the third post through hole 22 and the fourth post through hole 23, the second engaging portion 21 can fit the outline of the top patch 20 in a larger range, and the second engaging portion 21 and the first engaging portion 11 are mutually embedded, so that the bonding force of the cover 10 and the top patch 20 can be further improved, and the occurrence of the situation that the top patch 20 is tilted due to the peeling of the cover 10 by the top patch 20 is avoided.

When the end cap assembly 100 is applied to an energy storage device, the first pole through hole 12 and the third pole through hole 22 are used for exposing one pole of the energy storage device, and the second pole through hole 13 and the fourth pole through hole 23 are used for exposing the other pole.

Illustratively, the cover 10 is further provided with a first explosion-proof valve through-hole 14 penetrating the first surface 10a and the second surface 10b, the first explosion-proof valve through-hole 14 being located between the first post through-hole 12 and the second post through-hole 13, the first fitting 11 including a first annular portion 11a, a first extension portion 11b, and a second extension portion 11c, the first annular portion 11a being configured in a ring shape, a projection onto the first surface 10a, the first post through-hole 12 and the second post through-hole 13 being located within the first annular portion 11a, both ends of the first extension portion 11b being connected to the first annular portion 11a, the first extension portion 11b being located between the first post through-hole 12 and the first explosion-proof valve through-hole 14, both ends of the second extension portion 11c being connected to the first annular portion 11a, the second extension portion 11c being located between the second post through-hole 13 and the first explosion-proof valve through-hole 14, the top patch 20 is further provided with a second explosion-proof valve through-hole 24 penetrating the third surface 20a and the fourth surface 20b, the second explosion-proof valve through-hole 24 is located between the third pole through-hole 22 and the fourth pole through-hole 23, the second fitting portion 21 includes a second annular portion 21a, a third extension portion 21b, and a fourth extension portion 21c, the second annular portion 21a is configured in a ring shape, in the projection of the third surface 20a, the third pole through-hole 22 and the fourth pole through-hole 23 are located within the second annular portion 21a, both ends of the third extension portion 21b are connected to the second annular portion 21a, the third extension portion 21b is located between the third pole through-hole 22 and the second explosion-proof valve through-hole 24, both ends of the fourth extension portion 21c are connected to the second annular portion 21a, and the fourth extension portion 21c is located between the fourth pole through-hole 23 and the second explosion-proof valve through-hole 24. In this way, on the one hand, by fitting the contour of the cover 10 over a wide range by the first annular portion 11a and fitting the contour of the top sheet 20 over a wide range by the second annular portion 21a and the first annular portion 11a being fitted to each other, the bonding force of the cover 10 and the top sheet 20 can be improved, and the occurrence of the case where the top sheet 20 is lifted up due to the peeling of the cover 10 by the top sheet 20 can be avoided. On the other hand, by providing the first extending portion 11b and the third extending portion 21b embedded with each other, the second extending portion 11c and the fourth extending portion 21c embedded with each other, the first fitting portion 11 and the second fitting portion 21 are formed integrally in a "mesh" shape, and the post through hole and the explosion-proof valve through hole are located in the three "openings" of the "mesh" shape, respectively, so that the bonding force between the top patch 20 and the cover 10 at the edges of the post through hole and the explosion-proof valve through hole can be improved, the bonding force between the top patch 20 and the cover 10 is relatively high, and the risk of tilting the top patch 20 can be further reduced.

Wherein, when the end cover assembly 100 is applied to the energy storage device, the first explosion-proof valve through hole 14 and the second explosion-proof valve through hole 24 are used for exposing the explosion-proof valve of the energy storage device.

As an alternative embodiment, the first engaging portion 11 is a protruding structure formed by bending part of the cover body 10, the second engaging portion 21 is a recessed structure formed by bending part of the top patch 20, or the first engaging portion 11 is a recessed structure formed by bending part of the cover body 10, and the second engaging portion 21 is a protruding structure formed by bending part of the top patch 20. In this way, the cover 10 and the top patch 20 adopt a manner of bending a part of the structure to form a convex structure or a concave structure, and the manner of adding volume to form a convex structure or reducing volume to form a concave structure is not required, so that the design of the first matching portion 11 and the second matching portion 21 can be realized while maintaining the original volume and weight of the cover 10 and the top patch 20 as much as possible.

Optionally, the first matching portion 11 and the second matching portion 21 can be bent in a stamping manner, so that a protruding structure or a recessed structure is formed, the processing manner is simple and mature, the dimensional accuracy of the cover body 10 and the top patch 20 can be improved, the attaching accuracy of the top patch 20 and the cover body 10 is high, the attaching is tight, and the preparation yield of the energy storage device is high.

As another alternative embodiment, the first engaging portion 11 is a convex structure protruding from the first surface 10a, the second engaging portion 21 is a concave structure concavely disposed on the third surface 20a, or the first engaging portion 11 is a concave structure concavely disposed on the first surface 10a, and the second engaging portion 21 is a convex structure protruding from the third surface 20 a. In this way, the protruding structure is formed by protruding the surface, so that the structural strength and the volume of the cover body 10 and the top patch 20 can be increased, the recessed structure is formed by recessing the surface, so that the structural strength and the volume of the cover body 10 and the top patch 20 are reduced, one of the cover body 10 and the top patch 20 of the embodiment forms the protruding structure on the surface, and the other of the cover body 10 and the top patch 20 forms the recessed structure on the surface, so that the structural strength and the volume are increased by one, and the structural strength and the volume are mutually compensated, so that the design of the first matching part 11 and the second matching part 21 can be realized under the condition that the original integral structural strength, the integral volume and the weight of the cover body 10 and the top patch 20 are kept as much as possible.

In some embodiments, the cover 10 is further provided with a reinforcing rib 15, the reinforcing rib 15 is located on a side surface (i.e. the second surface 10 b) of the cover 10 facing away from the first surface 10a, and the reinforcing rib 15 is disposed corresponding to the first mating portion 11. In this way, by providing the reinforcing ribs 15 on the lid 10, the reinforcing ribs 15 can improve the structural strength of the lid 10, and prevent the lid 10 from being deformed. Particularly, after the energy storage device with the end cover assembly 100 is circularly charged and discharged, the interior of the energy storage device reacts to generate gas, the cover body 10 has larger structural strength, and the deformation of the cover body 10 caused by overlarge internal air pressure can be avoided, so that the explosion-proof valve of the energy storage device is opened beyond a preset explosion threshold value.

Illustratively, the first engaging portion 11 is a concave structure, the second engaging portion 21 is a convex structure, and the cover 10 is partially bent in a direction away from the first surface 10a to form the first engaging portion 11 on the first surface 10a, and the reinforcing rib 15 is formed on a side surface (i.e., the second surface 10 b) of the cover 10 away from the first surface 10 a. In this way, by bending the cover 10 partially in a direction away from the first surface 10a and simultaneously forming the first fitting portion 11 and the reinforcing rib 15, the first fitting portion 11 and the reinforcing rib 15 can be designed while maintaining the original volume and weight of the cover 10 as much as possible.

In some embodiments, as shown in fig. 2 and fig. 4, the first mating portion 11 is in a concave structure, the second mating portion 21 is in a convex structure, the first surface 10a is further provided with a concave portion 16, the concave portion 16 penetrates through a peripheral side surface of the cover 10, and the concave portion 16 is communicated with the first mating portion 11. Thus, by providing the recess 16 communicating with the first fitting portion 11, the recess 16 penetrates through the peripheral side surface of the cover 10, and after the top patch 20 is attached to the cover 10, a gap 100a is formed between the position of the top patch 20 corresponding to the recess 16 and the recess 16, and the gap 100a can discharge the gas between the first fitting portion 11 and the second fitting portion 21 when the top patch 20 is attached to the cover 10, thereby avoiding occurrence of the condition that the degree of attachment of the first fitting portion 11 and the second fitting portion 21 is affected by the generation of bubbles between the first fitting portion 11 and the second fitting portion 21, and improving the attaching force of the top patch 20 to the cover 10.

Illustratively, the first surface 10a is provided with four concave portions 16, the four concave portions 16 are respectively disposed in a one-to-one correspondence with four corners of the cover 10, and each concave portion 16 penetrates through two adjacent side surfaces corresponding to each corner of the cover 10. Thus, by disposing four concave portions 16 at the positions of the four corners of the cover 10, four gaps 100a are formed between the positions of the top patch 20 corresponding to the concave portions 16 and the concave portions 16, the four gaps 100a are located at the four corner positions of the top patch 20, and when the top patch 20 is attached to the cover 10, the air between the first fitting portion 11 and the second fitting portion 21 can be discharged from the four positions, the air discharge efficiency is high, the air discharge is uniform, and the risk of generating air bubbles between the first fitting portion 11 and the second fitting portion 21 can be further reduced.

Example two

Referring to fig. 5 and fig. 6 together, a schematic structural diagram of an energy storage device 200 according to a second embodiment of the utility model is provided, the energy storage device 200 includes a bottom case 201, a protective film 202 and an end cover assembly 100, the cover body 10 is covered and connected to the bottom case 201, the protective film 202 includes a main body portion 2021 and a bending portion 2022, the main body portion 2021 is wrapped on the bottom case 201, the bending portion 2022 extends from the main body portion 2021 to the cover body 10, the bending portion 2022 is wrapped on a portion of the first surface of the cover body 10, and the third surface of the top patch 20 is further attached to a side of the bending portion 2022 facing away from the first surface.

In some embodiments, as shown in fig. 6 and fig. 7, the first matching portion 11 is a concave structure, the second matching portion 21 is a convex structure, the first surface is further provided with four concave portions 16, the four concave portions 16 are respectively disposed in one-to-one correspondence with four corners of the cover 10, each concave portion 16 penetrates through two adjacent sides corresponding to each corner of the cover 10, the concave portions 16 are communicated with the first matching portion 11, the bending portion 2022 is configured in a ring shape, the four corners of the bending portion 2022 corresponding to the cover 10 are respectively provided with a folded structure 2022a, and the four folded structures 2022a are respectively accommodated in the four concave portions 16 one by one. In this way, by accommodating the four pleat structures 2022a in the four concave portions 16, the occurrence of the condition that the pleat structures 2022a are tilted up to cause the top patch 20 to tilt up simultaneously can be avoided.

Furthermore, the first embodiment describes that the concave portion 16 has a gap with the top patch 20 for discharging bubbles, thereby realizing structural multiplexing.

Example III

Referring to fig. 8, a schematic diagram of a power consumption device 300 according to a third embodiment of the present utility model is shown, where the power consumption device 300 includes an energy storage device 200 according to a second embodiment, and the energy storage device 200 is used to supply power to the power consumption device 300.

Example IV

Referring to fig. 9, a schematic diagram of an energy storage system 400 according to a fourth embodiment of the present utility model is shown, and the embodiment of fig. 9 of the present utility model is illustrated by taking a power generation/distribution side shared energy storage scenario as an example, and the energy storage device 200 of the present utility model is not limited to the power generation/distribution side energy storage scenario.

The present application provides an energy storage system 400, the energy storage system 400 comprising: the high-voltage cable 410, the first electric energy conversion device 420, the second electric energy conversion device 430 and the energy storage device 200 provided by the application, under the condition of power generation, the first electric energy conversion device 420 and the second electric energy conversion device 430 are used for converting other forms of energy into electric energy, are connected with the high-voltage cable 410 and are supplied to the power utilization side of a distribution network for use, when the power utilization load is lower, the first electric energy conversion device 420 and the second electric energy conversion device 430 store multiple generated electric energy into the energy storage device 200 when the power generation is excessive, the wind abandoning and the light abandoning rate are reduced, and the problem of power generation and consumption of new energy is improved; when the power consumption load is high, the power grid gives an instruction, the electric quantity stored by the energy storage device 200 is cooperated with the high-voltage cable 410 to transmit electric energy to the power consumption side for use in a grid-connected mode, so that various services such as peak regulation, frequency modulation and standby are provided for the operation of the power grid, the peak regulation effect of the power grid is fully exerted, peak clipping and valley filling of the power grid are promoted, and the power supply pressure of the power grid is relieved.

Optionally, the first and second power conversion devices 420 and 430 may convert at least one of solar energy, light energy, wind energy, heat energy, tidal energy, biomass energy, mechanical energy, etc. into electric energy.

The number of the energy storage devices 200 may be plural, and the plurality of energy storage devices 200 may be connected in series or parallel to each other, and the plurality of energy storage devices 200 may be supported and electrically connected by using a separator (not shown). In the present embodiment, "a plurality of" means two or more. The energy storage device 200 may further be provided with an energy storage box outside for accommodating the energy storage device 200.

Alternatively, the energy storage device 200 may include, but is not limited to, a battery cell, a battery module, a battery pack, a battery system, and the like. The practical application form of the energy storage device 200 provided in the embodiment of the present application may be, but is not limited to, the listed products, and may be other application forms, and the embodiment of the present application does not strictly limit the application form of the energy storage device 200. The embodiment of the present application will be described by taking the energy storage device 200 as a multi-core battery. When the energy storage device 200 is a single battery, the energy storage device 200 may be at least one of a cylindrical battery, a prismatic battery, and the like.

The energy storage device 200 can be applied to a power grid energy storage scene. The power grid energy storage scene can also comprise power generation equipment and electric equipment; the power generation device may be the first power conversion device 420 or the second power conversion device 430, and the electric device may be an object provided by the power transmitted through the high voltage cable 410, for example, may supply power to a load in an industrial, commercial or home scenario, without limitation. The energy storage device 200 is electrically connected with the power generation equipment and the electric equipment respectively, and the electric power generated by the power generation equipment can be supplied to the energy storage device 200 for storage or supplied to the electric equipment. The electric power stored by the energy storage device 200 can also be supplied to electric equipment.

The end cover assembly, the energy storage device and the electric equipment disclosed by the embodiment of the utility model are described in detail, and the principle and the implementation mode of the utility model are described by applying examples, so that the description of the above embodiment is only used for helping to understand the end cover assembly, the energy storage device and the electric equipment and the core ideas of the end cover assembly and the energy storage device; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims

1. An end cap assembly, comprising:

The cover body is provided with a first surface and a second surface which are opposite, the first surface is provided with a first matching part, the first matching part is constructed into a ring shape, the cover body is provided with a first pole through hole and a second pole through hole which penetrate through the first surface and the second surface, the first pole through hole and the second pole through hole are arranged at intervals, and the first pole through hole and the second pole through hole are located in the first matching part in a projection mode on the first surface; and

The top patch is provided with a third surface and a fourth surface which are opposite, the third surface is attached to the first surface, the third surface is provided with a second matching part, one of the first matching part and the second matching part is of a convex structure, the other of the first matching part and the second matching part is of a concave structure, the convex structure is embedded in the concave structure, the top patch is provided with a third pole through hole and a fourth pole through hole which penetrate through the third surface and the fourth surface, the third pole through hole and the fourth pole through hole are respectively corresponding to the first pole through hole and the second pole through hole, the projection of the third surface is provided with a third pole through hole and the fourth pole through hole which are positioned in the second matching part.

2. The end cap assembly of claim 1, wherein the cap body is further provided with a first explosion-proof valve through hole penetrating the first surface and the second surface, the first explosion-proof valve through hole being located between the first post through hole and the second post through hole, the first mating portion including a first annular portion configured in a ring shape, a first extension portion and a second extension portion, the first post through hole and the second post through hole being located within the first annular portion, both ends of the first extension portion being connected between the first annular portion, the first extension portion being located between the first post through hole and the first explosion-proof valve through hole, both ends of the second extension portion being connected between the first annular portion, the second extension portion being located between the second post through hole and the first explosion-proof valve through hole;

3. The end cap assembly of claim 1 or 2, wherein the first mating portion is a convex structure formed by bending the cover portion, the second mating portion is a concave structure formed by bending the top patch portion, or the first mating portion is a concave structure formed by bending the cover portion, and the second mating portion is a convex structure formed by bending the top patch portion.

4. The end cap assembly of claim 1 or 2, wherein the first mating portion is a convex structure protruding from the first surface, the second mating portion is a concave structure protruding from the third surface, or the first mating portion is a concave structure protruding from the first surface, and the second mating portion is a convex structure protruding from the third surface.

5. The end cap assembly of claim 1 or 2, wherein the cap body is further provided with a reinforcing rib, the reinforcing rib is located on a side surface of the cap body facing away from the first surface, and the reinforcing rib is disposed corresponding to the first mating portion.

6. The end cap assembly of claim 5, wherein the first mating portion is a concave structure and the second mating portion is a convex structure, the cover portion being bent in a direction away from the first surface to form the first mating portion on the first surface and the reinforcing rib on a side surface of the cover away from the first surface.

7. The end cap assembly of claim 1 or 2, wherein the first mating portion is a concave structure, the second mating portion is a convex structure, the first surface is further provided with a concave portion, the concave portion penetrates through a peripheral side surface of the cap body, and the concave portion is communicated with the first mating portion.

8. The end cap assembly of claim 3, wherein the first surface is provided with four recessed portions, the four recessed portions are respectively arranged in a one-to-one correspondence with four corners of the cap body, and each recessed portion penetrates through two adjacent side surfaces corresponding to each corner of the cap body.

9. An energy storage device, comprising a bottom shell, a protective film and an end cover assembly according to any one of claims 1 to 6, wherein the cover is covered and connected to the bottom shell, the protective film comprises a main body part and a bending part, the main body part is wrapped on the bottom shell, the bending part extends from the main body part to the cover, the bending part is wrapped on part of the first surface of the cover, and the third surface of the top patch is further attached to one side of the bending part, which is away from the first surface.

10. The energy storage device of claim 9, wherein the first mating portion is a concave structure, the second mating portion is a convex structure, the first surface is further provided with four concave portions, the four concave portions are respectively arranged in a one-to-one correspondence with four corners of the cover body, each concave portion penetrates through two adjacent side surfaces corresponding to each corner of the cover body, the concave portions are communicated with the first mating portion, the bending portion is configured into a ring shape, each bending portion is provided with a fold structure corresponding to four corners of the cover body, and the four fold structures are respectively accommodated in the four concave portions one by one.

11. A powered device comprising an energy storage device as claimed in claim 9 or 10 for powering the powered device.