End cover assembly, energy storage device and electric equipment

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, the end cover assembly comprises a cover body, a first insulating piece, a second insulating piece, a pole, a fixing piece, a sealing piece and an insulating support piece, the main body parts of the first insulating piece and the second insulating piece are arranged on the opposite surfaces of the cover body; the cap part of the pole is arranged on the side, deviating from the cover body, of the main body part, the body part of the pole is arranged on the face, facing the cover body, of the cap part and extends in the first direction, the fixing piece is arranged on the side, deviating from the cover body, of the first insulating piece and is fixed to the body part, and the sealing piece is pressed between the face, facing the cover body, of the fixing piece and the second surface. The insulating supporting piece is embedded in the main body part and located between the face, facing the cover body, of the cap part and the second surface. By adopting the end cover assembly, the energy storage device and the electric equipment provided by the utility model, the situation that the sealing element rebounds and loses the sealing effect can be avoided, and the risk of liquid leakage of the energy storage device is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an end cover assembly, an energy storage device and electrical equipment. Background Art

[0002] In the related art, energy storage devices (such as secondary batteries, etc.) usually need to be designed with a sealing structure, which is used to seal the energy storage device to prevent leakage and safety problems. Existing energy storage devices usually use sealing members to seal, and the squeezing force between the components of the energy storage device is used to compress the sealing member to an effective compression amount, thereby achieving sealing.

[0003] However, when the energy storage battery is tested and used, the heat generated can easily cause the insulating parts of the energy storage device to soften or deform. At this time, the extrusion force on the seal is reduced, and the seal is prone to rebound and lose its sealing effect, and the risk of leakage in the energy storage device is high. Utility Model Content

[0004] The embodiments of the utility model disclose an end cover assembly, an energy storage device and an electrical device, which can prevent the sealing component from rebounding and losing the sealing effect, and the risk of liquid leakage of the energy storage device is low.

[0005] In the first aspect, an embodiment of the utility model discloses an end cover assembly, which is applied to an energy storage device, including a cover body, a first insulating member, a second insulating member, a pole, a fixing member, a sealing member and an insulating support member, wherein the cover body has a first mounting hole, a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along a first direction of the end, the first insulating member is arranged on the first surface, the first insulating member has a second mounting hole corresponding to the first mounting hole, the aperture of the second mounting hole is larger than the aperture of the first mounting hole, the second insulating member includes a main body, the main body is arranged on the second surface, the main body has a third mounting hole corresponding to the first mounting hole, the pole includes a cap and a main body, the cap is arranged on the main body The main body is arranged on a side of the cap facing the cover body, and extends from the main body along the first direction and passes through the third mounting hole, the first mounting hole and the second mounting hole in sequence. The fixing member is arranged on a side of the first insulating member facing away from the cover body, and is fixedly connected to the main body. There is a gap between the side of the fixing member facing the cover body and the second surface. The sealing member is pressed between the side of the fixing member facing the cover body and the second surface, and is arranged around the outer peripheral wall of the main body. The insulating support member is embedded in the main body and is located between the side of the cap facing the cover body and the second surface. The melting point of the insulating support member is higher than the melting point of the second insulating member.

[0006] As an alternative embodiment, in the embodiment of the present utility model, the thickness of the main body portion in the first direction is t, and the height of the insulating support member in the first direction is h, where 0.6t ≤ h ≤ t.

[0007] As an alternative embodiment, in the embodiment of the present utility model, the height of the insulating support member in the first direction is h, where 0.6 mm ≤ h ≤ 2.0 mm.

[0008] As an alternative embodiment, in the embodiment of the present utility model, there are multiple insulating support members, and the multiple insulating support members are circumferentially and equally spaced on the main body portion.

[0009] As an alternative embodiment, in the embodiment of the present utility model, the main body portion is provided with a fourth mounting hole, the fourth mounting hole is a through hole or a blind hole, and the insulating support member is provided on the hole wall of the fourth mounting hole.

[0010] As an alternative embodiment, in the embodiment of the present utility model, the second insulating member further includes a first extension portion, the first extension portion extends from the main body portion in the first direction through the first mounting hole, and the first extension portion is located between the hole wall of the first mounting hole and the outer peripheral wall of the main body portion.

[0011] As an alternative embodiment, in the embodiment of the present utility model, the second insulating member further includes a second extension portion, the second extension portion is provided at one end of the main body portion away from the first extension portion, the second extension portion extends from the main body portion in the first direction away from the cover body, and the second extension portion abuts against the outer peripheral wall of the cap portion.

[0012] As an alternative embodiment, in the embodiment of the present utility model, the material of the insulating support member includes one or more of ceramics, glass, polyimide, and mica.

[0013] As an alternative embodiment, in the embodiment of the present utility model, the shape of the insulating support member includes one or more of a sphere, a cylinder, and a square column.

[0014] In a second aspect, the embodiment of the present utility model discloses an energy storage device, including the end cover assembly of the first aspect.

[0015] In a third aspect, the embodiment of the present utility model discloses an electrical equipment, including the energy storage device of the second aspect, and the energy storage device is used to supply power to the electrical equipment.

[0016] Compared with the prior art, the embodiments of the present utility model at least have the following beneficial effects:

[0017] In the embodiment of the present utility model, the cover body and the pole column can be separated by the first insulating member and the second insulating member, thereby realizing the insulation setting between the two. A sealing member is pressed between the cover body and the fixing member in the first direction, and the sealing member is used to realize the sealing design of the energy storage device. At the same time, an insulating support member is embedded in the main body portion of the second insulating member, and the insulating support member is located between the surface of the cap portion facing the cover body and the second surface. Thus, when the heat generated during the test or use of the energy storage device with this end cover assembly causes the second insulating member to soften or deform, since the melting point of the insulating support member is higher than that of the second insulating member, the insulating support member does not soften or deform under its high-temperature resistance property, and can reduce the change amount of the extrusion force of the cover body and the fixing member jointly pressing the sealing member, avoiding the sealing member from rebounding and losing the sealing effect, and the risk of liquid leakage of the energy storage device is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of an end cover assembly disclosed in Embodiment 1 of the present utility model;

[0020] Figure 2 is Figure 1 the sectional structure diagram taken along A-A in

[0021] Figure 3 is an exploded structural diagram of the end cover assembly disclosed in Embodiment 1 of the present utility model;

[0022] Figure 4 is an exploded structural diagram of the second insulating member and the insulating support member disclosed in Embodiment 1 of the present utility model;

[0023] Figure 5 is a schematic structural diagram of an energy storage device disclosed in Embodiment 2 of the present utility model;

[0024] Figure 6 is a schematic structural diagram of an electrical equipment disclosed in Embodiment 3 of the present utility model;

[0025] Figure 7 is a schematic structural diagram of an energy storage system disclosed in Embodiment 4 of the present utility model.

[0026] MAIN REFERENCE NUMERALS DESCRIPTION

[0027] 100. End cover assembly; 10. Cover body; 10a. First mounting hole; 10b. First surface; 10c. Second surface; 11. First insulating member; 11a. Second mounting hole; 12. Fixing member; 13. Terminal post; 131. Cap portion; 132. Body portion; 14. Sealing member; 15. Second insulating member; 151. Main body portion; 151a. Third mounting hole; 151b. Fourth mounting hole; 152. First extension portion; 153. Second extension portion; 16. Insulating support member; 200. Energy storage device; 300. Electrical equipment; 400. Energy storage system; 410. High-voltage cable; 420. First power conversion device; 430. Second power conversion device; x. First direction. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0030] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific situations.

[0031] In addition, the terms "mounting", "setting", "providing", "connecting", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components or parts. Unless otherwise specified, the meaning of "a plurality of" is two or more.

[0033] The utility model discloses an end cover assembly, an energy storage device and an electrical equipment, which can avoid the situation that the sealant rebounds and loses the sealing effect, and the risk of liquid leakage of the energy storage device is relatively low.

[0034] The following will describe in detail some embodiments of the present application with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0035] Since the energy required by people has strong temporality and spatiality, in order to rationally utilize energy and improve the energy utilization rate, it is necessary to store one form of energy in the same or converted into another form of energy through a medium or device, and then release it in a specific energy form based on future application needs. At present, the main way to generate green electric energy is to develop green energy such as photovoltaic and wind power to replace fossil energy. At present, the generation of green electric energy generally depends on photovoltaic, wind power, water potential, etc. However, wind energy and solar energy generally have problems such as strong intermittency and large volatility, which will cause the power grid to be unstable, there is not enough electricity during peak electricity consumption, and there is too much electricity during low electricity consumption. The unstable voltage will also damage the power. Therefore, the problem of "abandoning wind and light" may be caused due to insufficient power demand or insufficient grid acceptance capacity. To solve these problems, energy storage is required. That is, the electric energy is converted into other forms of energy and stored through physical or chemical means, and the energy is converted into electric energy and released when needed. Simply put, energy storage is similar to a large "power bank", which stores electric energy when photovoltaic and wind energy are sufficient and releases the stored electric energy when needed.

[0036] Taking electrochemical energy storage as an example, the present solution provides an energy storage device. A group of chemical batteries are provided in the energy storage device, which mainly uses the chemical elements in the batteries as the energy storage medium. The charge and discharge process is accompanied by chemical reactions or changes of the energy storage medium. Simply put, the electric energy generated by wind energy and solar energy is stored in the chemical batteries, and the stored electric quantity is released for use when the external electric energy usage reaches the peak, or transferred to places with tight power for use.

[0037] At present, the application scenarios of current energy storage (i.e., energy storage) are relatively wide, including power generation side energy storage, grid side energy storage, and user side energy storage, etc. The corresponding types of energy storage devices include:

[0038] (1) Large-scale energy storage power stations applied on the wind power and photovoltaic power station sides can assist renewable energy power generation to meet grid connection requirements, and at the same time improve the utilization rate of renewable energy; as high-quality active / reactive power regulation power sources on the power supply side, energy storage power stations achieve load matching of electric energy in time and space, enhance the consumption capacity of renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the problem of new energy power generation consumption, and are of great significance in power grid system standby, alleviating the power supply pressure during peak loads, and peak shaving and frequency modulation.

[0039] (2) Energy storage containers applied on the power grid side are mainly used for peak shaving, frequency modulation, and alleviating grid congestion peak shaving. They can achieve peak shaving and valley filling of electricity loads, that is, charging energy storage batteries during low electricity load valleys and releasing the stored electricity during high electricity load peaks, so as to achieve the balance between power production and consumption.

[0040] (3) Small energy storage cabinets applied on the user side are mainly used for self-generation and self-use of electricity, peak-valley price difference arbitrage, capacity charge management, and improving power supply reliability. According to different application scenarios, energy storage on the user side can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in combination with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price difference arbitrage and capacity charge management. In the electricity market implementing peak-valley electricity prices, by charging the energy storage system at low electricity prices and discharging the energy storage system at high electricity prices, peak-valley electricity price difference arbitrage is achieved, reducing electricity costs. In addition, industrial enterprises applicable to two-part electricity prices can use the energy storage system to store energy during low electricity load valleys and discharge during peak loads, thereby reducing peak power and the declared maximum demand, and achieving the purpose of reducing capacity electricity charges. Household photovoltaic energy storage can improve the level of self-generation and self-use of electricity. Due to high electricity prices and poor power supply stability, it stimulates the demand for household photovoltaic installations. Considering that photovoltaics generate electricity during the day while users generally have higher loads at night, by configuring energy storage, photovoltaic power can be better utilized, the level of self-generation and self-use can be improved, and electricity costs can be reduced at the same time. In addition, energy storage needs to be configured in fields such as communication base stations and data centers for backup power supplies.

[0041] Example 1

[0042] Please refer to Figures 1 to 3, is a structural schematic diagram of an end cover assembly 100 provided in Embodiment 1 of the utility model, the end cover assembly 100 includes a cover body 10, a first insulating member 11, a fixing member 12, a pole 13, a sealing member 14, a second insulating member 15 and an insulating support member 16, the cover body 10 has a first mounting hole 10a, a first surface 10b and a second surface 10c, the first surface 10b and the second surface 10c are arranged opposite to each other along the first direction x of the end, the first insulating member 11 is arranged on the first surface 10b, the first insulating member 11 has a second mounting hole 11a corresponding to the first mounting hole 10a, the aperture of the second mounting hole 11a is larger than the aperture of the first mounting hole 10a, the second insulating member 15 includes a main body 151, the main body 151 is arranged on the second surface 10c, the main body 151 has a third mounting hole 151a corresponding to the first mounting hole 10a, the pole 13 includes The cap portion 131 and the main body portion 132, the cap portion 131 is arranged on the side of the main body portion 151 away from the cover body 10, the main body portion 132 is arranged on the side of the cap portion 131 facing the cover body 10, and extends from the main body portion 132 along the first direction x and passes through the third mounting hole 151a, the first mounting hole 10a and the second mounting hole 11a in sequence, the fixing member 12 is arranged on the side of the first insulating member 11 away from the cover body 10, and is fixedly connected to the main body portion 132, there is a gap between the side of the fixing member 12 facing the cover body 10 and the second surface 10c, the sealing member 14 is pressed between the side of the fixing member 12 facing the cover body 10 and the second surface 10c, and is arranged around the outer peripheral wall of the main body portion 132, the insulating support member 16 is embedded in the main body, and is located between the side of the cap portion 131 facing the cover body and the second surface 10c, the melting point of the insulating support member 16 is higher than the melting point of the second insulating member 15.

[0043] In this embodiment, the first insulating member 11 and the second insulating member 15 can separate the cover body 10 and the pole 13 to achieve the insulation setting of the two. A seal 14 is pressed between the cover body 10 and the fixing member 12 in the first direction x, and the sealing design of the energy storage device is realized by using the seal 14. At the same time, the main body 151 of the second insulating member 15 is embedded with an insulating support member 16, and the insulating support member 16 is located between the side of the cap 131 facing the cover body and the second surface 10c. In this way, when the heat generated by the energy storage device using the end cover assembly 100 during testing or use causes the second insulating member 15 to soften or deform, since the melting point of the insulating support member 16 is higher than the melting point of the second insulating member 15, the insulating support member 16 does not soften or deform under its high temperature resistance, which can reduce the change in the extrusion force of the cover body 10 and the fixing member 12 to press the seal 14 together, avoid the seal 14 rebounding and losing the sealing effect, and the risk of leakage of the energy storage device is low.

[0044] For example, Figure 2As shown, the thickness of the main body portion 151 in the first direction x is t, and the height of the insulating support 16 in the first direction x is h, where 0.6t ≤ h ≤ t. If the height h of the insulating support 16 is less than 0.6t, the height h of the insulating support 16 is relatively small, and the supporting effect of the insulating support 16 is poor, making it difficult to reduce the change amount of the extrusion force with which the cover 10 and the fixing member 12 jointly compress the seal 14. Thus, the height of the insulating support 16 being less than the thickness of the main body portion 151 can prevent the insulating support 16 from protruding from the main body portion 151. In this way, before the second insulating member 15 softens or deforms under the influence of the heat generated by the energy storage device, the main body portion 151 can enable the cover 10 and the fixing member 12 to provide the extrusion force for jointly compressing the seal 14, causing the seal 14 to be compressed to the effective compression amount. When the second insulating member 15 softens or deforms under the influence of the heat generated by the energy storage device, the insulating support 16 becomes effective and can reduce the change amount of the extrusion force with which the cover 10 and the fixing member 12 jointly compress the seal 14. Also, the height h of the insulating support 16 in the first direction x can be 0.6t, 0.7t, 0.8t, 0.9t, t, etc., and this embodiment does not make specific limitations on this.

[0045] Among them, the effective compression amount refers to the compression amount that the seal 14 undergoes when being extruded by the extrusion force, and when it is equal to or exceeds this effective compression amount, the seal 14 has a sealing effect.

[0046] Optionally, the height of the insulating support 16 in the first direction x is h, where 0.6 mm ≤ h ≤ 2 mm. If the height h of the insulating support 16 in the first direction x is less than 0.6 mm, the height of the insulating support 16 is small. When the second insulating member 15 softens or deforms under the influence of the heat generated by the energy storage device, the insulating support 16 is less effective in reducing the change amount of the extrusion force with which the cover body 10 and the fixing member 12 jointly press the seal member 14, that is, the above change amount is large, and the sealing effect of the seal member 14 is poor. If the height h of the insulating support 16 in the first direction x is greater than 2 mm, the height of the insulating support 16 is large, the thickness of the main body portion 151 needs to be set large, and the overall thickness of the end cover assembly 100 is large, which is not conducive to the miniaturization design of the energy storage device. Therefore, the height h of the insulating support 16 in the first direction x can be 0.6 mm ≤ h ≤ 2 mm. When the second insulating member 15 softens or deforms under the influence of the heat generated by the energy storage device, the insulating support 16 is effective in reducing the change amount of the extrusion force with which the cover body 10 and the fixing member 12 jointly press the seal member 14, that is, the above change amount is small, the sealing effect of the seal member 14 is good, and the thickness of the main body portion 151 can be set small, and the overall thickness of the end cover assembly 100 is small, which is conducive to the miniaturization design of the energy storage device. Moreover, the height h of the insulating support 16 in the first direction x can be 0.6 mm, 0.65 mm, 0.75 mm, 0.85 mm, 0.95 mm, 1.05 mm, 1.15 mm, 1.25 mm, 1.35 mm, 1.45 mm, 1.55 mm, 1.65 mm, 1.75 mm, 1.85 mm, 2 mm, etc., and the present embodiment does not make specific limitations thereon.

[0047] In some embodiments, such as Figure 3 and Figure 4 shown, there are multiple insulating supports 16, and the multiple insulating supports 16 are spaced apart and distributed on the main body portion 151. In this way, by the multiple insulating supports 16 being spaced apart and distributed on the main body portion 151, when the multiple insulating supports 16 become effective, the seal member 14 can be jointly pressed by the cover body 10 and the fixing member 12 at multiple positions corresponding to the multiple insulating supports 16, and the sealing effect of the insulating supports 16 is good.

[0048] Exemplarily, the multiple insulating supports 16 are circumferentially equally spaced. In this way, when the multiple insulating supports 16 become effective, the force applied by the cover body 10 and the fixing member 12 to jointly press the seal member 14 at the positions corresponding to the insulating supports 16 is relatively uniform, the compression amounts of the various parts of the seal member 14 are relatively consistent, and the sealing effect is good.

[0049] As an alternative implementation manner, such as Figure 4As shown, the main body 151 is provided with a fourth mounting hole 151b, and the insulating support 16 is disposed on the hole wall of the fourth mounting hole 151b. In this way, by providing the fourth mounting hole 151b, the insulating support 16 is arranged by using the fourth mounting hole 151b, which can reduce the space occupied by the insulating support 16, and the overall thickness of the end cap assembly 100 is relatively small.

[0050] Optionally, the second insulating member 15 is provided with a fourth mounting hole 151b, and the fourth mounting hole 151b is a through hole or a blind hole, and the insulating support 16 is disposed on the hole wall of the fourth mounting hole 151b. This embodiment provides various different types of fourth mounting holes 151b, which can be selected according to actual situations, and this embodiment does not make specific limitations in this regard.

[0051] As another alternative embodiment, the second insulating member 15 is embedded inside the main body 151. In this way, by embedding the insulating support 16 inside the main body 151, the space occupied by the insulating support 16 can be reduced, and the overall thickness of the end cap assembly 100 is relatively small.

[0052] Specifically, the second insulating member 15 can wrap the insulating support 16 by means of secondary injection molding, so that the insulating support 16 is embedded inside the main body 151.

[0053] In some embodiments, as Figure 2 and Figure 4 shown, the second insulating member 15 further includes a first extension portion 152. The first extension portion 152 extends from the main body 151 in the first direction x through the first mounting hole 10a, and the first extension portion 152 is located between the hole wall of the first mounting hole 10a and the outer peripheral wall of the main body portion 132. In this way, by pressing the main body 151 between the cover 10 and the cap portion 131 in the first direction x, insulation between the cover 10 and the cap portion 131 can be achieved, and by the first extension portion 152 being located between the hole wall of the first mounting hole 10a and the outer peripheral wall of the main body portion 132, insulation between the cover 10 and the main body portion 132 can be achieved.

[0054] Exemplarily, the second insulating member 15 further includes a second extension portion 153. The second extension portion 153 is disposed at one end of the main body 151 facing away from the first extension portion 152. The second extension portion 153 extends from the main body 151 in the first direction x away from the cover 10, and the second extension portion 153 abuts against the outer peripheral wall of the cap portion 131. In this way, by the second extension portion 153 extending in the first direction x away from the cover 10 and abutting against the outer peripheral wall of the cap portion 131, while protecting the cap portion 131, the situation of short circuit caused by contact conduction on the outer peripheral wall of the cap portion 131 can be avoided.

[0055] Optionally, the material of the insulating support 16 includes one or more of ceramics, glass, polyimide, and mica. In this embodiment, insulating supports 16 of various different materials are provided and can be selected according to actual situations, and this embodiment does not make specific limitations thereon.

[0056] Optionally, the shape of the insulating support 16 includes one or more of a sphere, a cylinder, and a square column. In this embodiment, insulating supports 16 of various different shapes are provided and can be selected according to actual situations, and this embodiment does not make specific limitations thereon.

[0057] Embodiment Two

[0058] Please refer to Figure 5 , which is a schematic structural diagram of an energy storage device 200 provided by the second embodiment of the present utility model. The energy storage device 200 includes the end cover assembly 100 of the first embodiment.

[0059] Embodiment Three

[0060] Please refer to Figure 6 , which is a schematic structural diagram of an electrical equipment 300 provided by the third embodiment of the present utility model. The electrical equipment 300 includes the energy storage device 200 of the second embodiment, and the energy storage device 200 is used to supply power to the electrical equipment 300.

[0061] Embodiment Four

[0062] Please refer to Figure 7 , which is a schematic structural diagram of an energy storage system 400 according to the fourth embodiment of the present utility model, and in this application Figure 7 the embodiments are described by taking the shared energy storage scenario on the power generation / distribution side as an example, and the energy storage device 200 of this application is not limited to its energy storage scenario on the power generation / distribution side.

[0063] This application provides an energy storage system 400. The energy storage system 400 includes: a high-voltage cable 410, a first power conversion device 420, a second power conversion device 430, and the energy storage device 200 provided by this application. In the case of power generation, the first power conversion device 420 and the second power conversion device 430 are used to convert other forms of energy into electric energy, connect to the high-voltage cable 410 and supply it for use on the power distribution side of the power grid. When the power consumption load is low and the first power conversion device 420 and the second power conversion device 430 generate excess power, the excess power generated is stored in the energy storage device 200 to reduce the wind curtailment and light curtailment rates and improve the problem of new energy power generation accommodation. When the power consumption load is high, the power grid issues an instruction, and the electric energy stored in the energy storage device 200 is transmitted in a grid-connected mode in cooperation with the high-voltage cable 410 to supply electric energy for use on the power consumption side, providing various services such as peak regulation, frequency modulation, and standby for the operation of the power grid, giving full play to the role of the power grid in peak regulation, promoting peak shaving and valley filling of the power grid, and alleviating the power supply pressure of the power grid.

[0064] Optionally, the first power conversion device 420 and the second power conversion device 430 may convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy, mechanical energy, etc. into electrical energy.

[0065] The number of energy storage devices 200 may be multiple. The multiple energy storage devices 200 are connected in series or in parallel with each other, and the multiple energy storage devices 200 are supported and electrically connected by a separator plate (not shown in the figure). In this embodiment, "multiple" means two or more. An energy storage box may also be provided outside the energy storage device 200 for accommodating the energy storage device 200.

[0066] Optionally, the energy storage device 200 may include, but is not limited to, single cells, battery modules, battery packs, battery systems, etc. The actual application forms of the energy storage device 200 provided in the embodiments of the present application may be, but are not limited to, the listed products, and may also be other application forms. The embodiments of the present application do not strictly limit the application forms of the energy storage device 200. The embodiments of the present application only take the energy storage device 200 as a multi-core battery as an example for illustration. When the energy storage device 200 is a single cell, the energy storage device 200 may be at least one of a cylindrical battery, a square battery, etc.

[0067] Among them, the energy storage device 200 may be applied in a grid energy storage scenario. The grid energy storage scenario may also include a power generation device and a power consumption device; the power generation device may be the first power conversion device 420 or the second power conversion device 430, and the power consumption device may be the object provided by the electrical energy transmitted through the high-voltage cable 410. For example, it may supply power to loads in industrial, commercial or household scenarios, and specific limitations are not made. The energy storage device 200 is electrically connected to the power generation device and the power consumption device respectively. The power generated by the power generation device may be supplied to the energy storage device 200 for storage, or supplied to the power consumption device. The power stored in the energy storage device 200 may also be supplied to the power consumption device.

[0068] The above has introduced in detail an end cap assembly, an energy storage device and an electrical equipment disclosed in the embodiments of the present invention. In this article, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand an end cap assembly, an energy storage device and an electrical equipment of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An end cap assembly, applied to an energy storage device, characterized in that: include: A cover body, the cover body having a first mounting hole, a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along a first direction; a first insulating member, the first insulating member being disposed on the first surface, the first insulating member having a second mounting hole corresponding to the first mounting hole, the aperture of the second mounting hole being larger than the aperture of the first mounting hole; a second insulating member, the second insulating member comprising a main body, the main body being disposed on the second surface, the main body having a third mounting hole corresponding to the first mounting hole; A pole, the pole comprising a cap and a body, the cap being disposed on a side of the body away from the cover, the body being disposed on a side of the cap facing the cover, and extending from the body along the first direction and sequentially passing through the third mounting hole, the first mounting hole, and the second mounting hole; A fixing member, the fixing member is arranged on a side of the first insulating member away from the cover body and is fixedly connected to the main body, and a distance is formed between a side of the fixing member facing the cover body and the second surface; A sealing member, the sealing member is pressed between a surface of the fixing member facing the cover body and the second surface, and is arranged around the outer peripheral wall of the main body; as well as An insulating support member is embedded in the main body and located between a surface of the cap portion facing the cover body and the second surface. The melting point of the insulating support member is higher than the melting point of the second insulating member.

2. The end cap assembly according to claim 1, characterized in that: The thickness of the main body along the first direction is t, the height of the insulating support member along the first direction is h, and 0.6t≤h≤t.

3. The end cap assembly according to claim 1, characterized in that: The height of the insulating support member along the first direction is h, and 0.6 mm≤h≤2.0 mm.

4. The end cap assembly according to any one of claims 1 to 3, characterized in that: There are a plurality of insulating support members, and the plurality of insulating support members are evenly distributed on the main body at circumferential intervals.

5. The end cap assembly according to any one of claims 1 to 3, characterized in that: The main body is provided with a fourth mounting hole, the fourth mounting hole is a through hole or a blind hole, and the insulating support is arranged on the hole wall of the fourth mounting hole.

6. The end cap assembly according to any one of claims 1 to 3, characterized in that: The second insulating member further includes a first extending portion, which extends from the main body along the first direction and passes through the first mounting hole, and is located between a hole wall of the first mounting hole and an outer peripheral wall of the main body.

7. The end cap assembly according to claim 6, characterized in that: The second insulating member also includes a second extension portion, which is arranged at one end of the main body away from the first extension portion, and extends from the main body along the first direction away from the cover body, and the second extension portion abuts against the outer peripheral wall of the cap.

8. The end cap assembly according to any one of claims 1 to 3, characterized in that: The material of the insulating support member includes one or more of ceramic, glass, polyimide and mica.

9. The end cap assembly according to any one of claims 1 to 3, characterized in that: The shape of the insulating support member includes one or more of a sphere, a cylinder and a square column.

10. An energy storage device, characterized in that: Comprising the end cap assembly according to any one of claims 1 to 9.

11. An electrical device, characterized in that: It comprises the energy storage device as claimed in claim 10, wherein the energy storage device is used to supply power to the electrical equipment.

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