CN220544049U - Battery shell, energy storage device and electric equipment - Google Patents

Abstract

The utility model discloses a battery shell, an energy storage device and electric equipment. The battery shell comprises a shell body, a top cover assembly and at least two bases, wherein the shell body comprises a bottom plate and a side plate connected with the edge of the bottom plate, the bottom plate and the side plate enclose one end of the shell body to form a cavity with an opening, the edge of the bottom plate comprises two first edges and a second edge connected with the first edges, the second edge is arranged along the length direction of the electrode assembly, the top cover assembly covers the opening, the bases are located on the bottom plate, the two bases are respectively adjacent to the two first edges, the surface of the base facing the opening comprises a supporting surface, the vertical distance between the supporting surface and the surface of the bottom plate adjacent to the base is equal to the height of the supporting surface, and the height of the supporting surface is gradually reduced from the end point of the first edges to the center of the first edges. The battery case can improve stability of the electrode assembly, thereby improving stability and performance of the battery.

Description

Battery shell, energy storage device and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery shell, an energy storage device and electric equipment.

Background

In the prior art, an electrode assembly of a battery is mounted in a case with a certain gap between the electrode assembly and the case. When the battery is impacted to shake, the electrode assembly and the shell can move relatively, and the stability of the battery performance is affected. Particularly, when the top cap assembly of the battery is of a T-shaped structure, the top cap is connected with the electrode assembly through the pins, and when the electrode assembly and the case may undergo relative movement, the pins are easily broken, thereby affecting the performance of the battery.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present utility model proposes a battery case capable of improving stability of an electrode assembly, thereby improving stability and performance of a battery.

The utility model also aims to provide an energy storage device with the battery shell.

The utility model also aims to provide electric equipment with the energy storage device.

According to an embodiment of the first aspect of the present utility model, a battery case includes a case body including a bottom plate and a side plate connecting edges of the bottom plate, the bottom plate and the side plate enclosing a cavity having an opening at one end, the edges of the bottom plate including two first sides, a second side connected to the first sides, the second side being disposed along a length direction of an electrode assembly, the top cover assembly covering the opening, and at least two bases on the bottom plate, wherein the two bases are disposed adjacent to the two first sides, respectively, a surface of the base facing the opening includes a support surface, a vertical distance between the support surface and a surface of the bottom plate adjacent to the base is a height of the support surface, and a height of the support surface is gradually reduced in a direction from an end point of the first side to a center of the first side.

According to the battery shell, at least two bases are arranged on the bottom plate, wherein the two bases are respectively adjacent to the two first sides, and the height of the supporting surface is gradually reduced in the direction from the end point of the first side to the center of the first side, so that the bases can limit the electrode assembly in the direction of the first side and the height direction of the supporting surface when the battery is impacted or rocked, the stability of the electrode assembly in the battery shell is improved, and the stability and performance of the battery are further improved.

According to some embodiments of the utility model, the base is an insulating member, or the base is provided with an insulating layer at least on the support surface. Therefore, the electrode assembly can be insulated from the battery shell at the base, so that the electrode assembly and the battery shell are not easy to conduct, and the normal use of the battery is ensured.

According to some embodiments of the utility model, the seats are arranged in pairs, with two seats of a pair being spaced apart along the extension direction of the first edge, the seats being at least two pairs spaced apart along the extension direction of the second edge. Like this, can carry out spacingly to electrode assembly to the both sides of electrode assembly in the direction of first limit with two pairs of bases, and the base need not span electrode assembly, has reduced the volume and the weight of base, has increased the liquid retention volume of electrolyte, and the base is two at least pairs of along the extending direction interval distribution of second limit, like this, can stably prop up electrode assembly in motor assembly's length direction, has improved the stability of supporting.

According to some embodiments of the utility model, the battery case further includes at least one insulating film over the bottom plate, the insulating film being disposed along an extending direction of the first side, two bases of the same pair being connected to the insulating film, wherein the insulating film is connected to a surface of the base facing the bottom plate, or the insulating film is connected to a surface of the other base of the same pair facing the bottom plate. The two bases of the same pair are connected to the insulating film, so that the insulating film can separate the part of the electrode assembly between the two bases of the same pair from the battery shell, the motor assembly and the battery shell are not easy to conduct, and normal use of the battery is guaranteed.

According to some embodiments of the utility model, the minimum height of the support surface is a, a being 3mm-5mm. Like this, when electrode assembly received striking or takes place the extrusion, be difficult for with being located the bottom plate contact between two base of the same pair, the clearance between electrode assembly and the bottom plate has played insulating effect for electrode assembly is difficult for electrically conductive with the battery case, has guaranteed the normal use of battery.

According to some embodiments of the utility model, the base is a piece of elastic material and the difference in height between the compressed state and the uncompressed state at any point on the support surface is in the range of 1mm to 1.5mm. Through establishing the base as elastic material spare for when the battery receives the striking, the base can play the effect of buffering to electrode assembly, makes electrode assembly be difficult for impaired, thereby protection battery, extension battery's life. The range of the height difference between the compression state and the non-compression state of any point on the supporting surface is set to be 1mm-1.5mm, so that when the electrode assembly is impacted and extruded on the supporting surface, a gap of 2mm-3.5mm can be reserved between the electrode assembly and the bottom plate, an insulating effect can be still achieved, the electrode assembly is not easy to conduct electricity with the battery shell, and normal use of the battery is guaranteed.

According to some embodiments of the utility model, the battery case further includes an insulating plate located in the cavity, the insulating plate including a first plate region, a second plate region and a third plate region, the first plate region being located on the base plate, the second plate region being connected to one side of the first plate region, the third plate region being connected to the other side of the first plate region, the electrode assembly being located between the first plate region, the second plate region and the third plate region, and the base being fixedly connected to the first plate region. The electrode assembly is separated from the battery case by an insulating plate, so that the electrode assembly is connected with the battery case in an insulating manner. The first plate region separates the electrode assembly from the bottom plate, and the second plate region separates the electrode assembly from the side plate, thereby making an insulating connection between the electrode assembly and the battery case.

According to some embodiments of the utility model, the base is provided with a lightening hole. The weight reducing holes are formed in the base, so that the weight of the battery can be reduced, and the liquid retention amount of the battery can be increased.

According to a second aspect of the present utility model, an energy storage device includes a battery case, an electrode assembly and pins in the above embodiments, the electrode assembly is located in the cavity, a length direction of the electrode assembly is set along a second side of a bottom plate of the battery case, a base of the battery case is located on the bottom plate and contacts the electrode assembly through a supporting surface, and two bases are located at two ends of the electrode assembly in the length direction; one end of the pin is connected with the pole column on the top cover assembly, and the other end of the pin is connected with the electrode assembly.

According to the energy storage device provided by the embodiment of the utility model, the stability and the performance of the energy storage device are improved by adopting the battery shell in the embodiment, and meanwhile, the assembly efficiency of the energy storage device is improved, and the production cost is reduced.

According to a third aspect of the utility model, the electric device comprises the energy storage device in the second aspect.

According to the electric equipment provided by the embodiment of the utility model, the stability and the assembly efficiency of the electric equipment are improved and the production cost is reduced by adopting the energy storage device.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is an exploded view of a battery case according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of a battery case according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a base of a battery case according to an embodiment of the present utility model;

fig. 4 is a schematic view of the connection of the base of the battery case with the base plate according to an embodiment of the present utility model;

fig. 5 is a schematic view showing an embodiment of disposing an insulating film in a battery case according to an embodiment of the present utility model;

fig. 6 is a schematic view of another embodiment of disposing an insulating film in a battery case according to an embodiment of the present utility model;

fig. 7 is a schematic view of a base of a battery case connected to an insulating plate according to an embodiment of the present utility model;

FIG. 8 is an exploded view of an energy storage device according to an embodiment of the present utility model;

FIG. 9 is a cross-sectional view of an energy storage device according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of an application scenario of the energy storage device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an application scenario of an energy storage device according to another embodiment of the present application.

Reference numerals:

battery case 100,

A housing body 10, a bottom plate 11, a first side 111, a second side 112, a side plate 12, an opening 10a,

A cap assembly 20,

A base 30, a supporting surface 31, a lightening hole 32,

An insulating film 40,

An insulating plate 50, a first plate region 51, a second plate region 52, a third plate region 53,

Energy storage device 1000, electrode assembly 200, pins 300,

Power conversion device 2000, first user load 3000, second user load 4000, high-voltage cable 5000, first power conversion device 6000, second power conversion device 7000,

And powered device 10000.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

The battery case 100, the energy storage device 1000, and the electric device according to the embodiment of the utility model are described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the battery case 100 according to the embodiment of the first aspect of the present utility model includes a case body 10, a top cap assembly 20, and at least two bases 30, the case body 10 including a bottom plate 11 and a side plate 12 connecting edges of the bottom plate 11, the bottom plate 11 and the side plate 12 enclosing a cavity having an opening 10a at one end, the edges of the bottom plate 11 including two first sides 111, a second side 112 connected to the first sides 111, the second side 112 being disposed along a length direction of the electrode assembly, the top cap assembly 20 covering the opening 10a, the bases 30 being positioned on the bottom plate 11, wherein the two bases 30 are disposed adjacent to the two first sides 111, respectively, a surface of the base 30 facing the opening 10a includes a supporting surface 31, a vertical distance between the supporting surface 31 and a surface of the bottom plate 11 adjacent to the bases 30 is a height of the supporting surface 31, and the height of the supporting surface 31 is gradually reduced in a direction from an end point of the first sides 111 to a center of the first sides 111.

Specifically, as shown in fig. 1, the battery case 100 of the embodiment of the present utility model includes a case body 10, the case body 10 including a bottom plate 11 and a side plate 12 connecting edges of the bottom plate 11, the bottom plate 11 and the side plate 12 enclosing a cavity having an opening 10a at one end, so that the electrode assembly 200 is conveniently loaded into the cavity of the case body 10 through the opening 10 a. The shape of the bottom plate 11 is not limited. For example, the bottom plate 11 may be circular, rectangular, or the like.

As shown in fig. 1 and 2, the cap assembly 20 covers the opening 10a to close the opening 10a of the cavity. The shape and size of the top cover assembly 20 may be the same as or different from the shape and size of the opening 10a, for example, the size of the top cover assembly 20 may be larger than the opening 10 a.

As shown in fig. 2 and 3, at least two bases 30 are positioned on the base plate 11, wherein the two bases 30 are disposed adjacent to the two first sides 111, respectively, to support the electrode assembly 200 at positions adjacent to the two first sides 111, respectively, a surface of the base 30 facing the opening 10a includes a support surface 31, the base 30 supports the electrode assembly 200 through the support surface 31, and separates the electrode assembly 200 from the base plate 11. The mounting of the base 30 and the bottom plate 11 is not limited, for example, the base 30 may be fixedly connected with the bottom plate 11, specifically, welded, adhered, integrally formed, etc.; the base 30 may also be detachably connected to the base plate 11, specifically, by a snap connection, a screw connection, or the like.

The vertical distance between the support surface 31 and the surface of the base plate 11 adjacent to the base 30 is the height of the support surface 31, the height of the support surface 31 is a, and the value of a gradually decreases in the direction from the end point of the first side 111 to the center of the first side 111. In this way, the supporting surface 31 can support the electrode assembly 200 in the direction of the first edge 111 and the height direction of the supporting surface 31, so that when the battery is impacted or rocked, the base 30 can limit the electrode assembly 200 in the direction of the first edge 111 and the height direction of the supporting surface 31, thereby improving the stability of the electrode assembly 200 in the battery case 100 and further improving the stability and performance of the battery.

It will be appreciated that, as shown in fig. 3, the height of the supporting surface 31 may be smoothly transited from the end point of the first side 111 to the center of the first side 111, for example, the supporting surface 31 may be an arc surface or the like. The height of the support surface 31 may also be a slope transition from the end point of the first side 111 to the center of the first side 111, for example, the support surface 31 may be a slope or the like.

It should be noted that, when the bottom plate 11 is circular, the first edge 111 may be a half arc; when the base plate 11 is rectangular, the first side 111 may be rectangular in length or width.

Thus, according to the battery case 100 of the present utility model, by providing at least two seats 30 on the bottom plate 11, wherein the two seats 30 are respectively disposed adjacent to the two first sides 111, and the height of the supporting surface 31 is gradually reduced in a direction from the end point of the first side 111 to the center of the first side 111, so that the seats 30 can limit the electrode assembly 200 in the direction of the first side 111 and the height direction of the supporting surface 31 when the battery is impacted or rocked, thereby improving the stability of the electrode assembly 200 in the battery case 100, and further improving the stability and performance of the battery.

In some embodiments, the cap assembly 20 includes a cap and a lead 300, and the cap is connected with the electrode assembly 200 through the lead 300. Thus, the assembly is convenient, and the production efficiency of the battery is improved.

In some embodiments, the height of the support surface 31 is smoothly transited from the end point of the first side 111 to the center of the first side 111, so that the support surface 31 and the electrode assembly 200 can completely coincide, support more stably, and better protect the electrode assembly 200.

In some embodiments, the support surface 31 may extend from one side of the electrode assembly 200 to the other side of the electrode assembly 200, or may extend from one side of the electrode assembly 200 to a side of the electrode assembly 200 adjacent to the bottom plate 11. For example, the base 30 may have a U-shaped structure, and the supporting surface 31 may be an arc surface or a U-shape; alternatively, the base 30 may be L-shaped, and the supporting surface 31 may be an L-shaped or arc surface.

In some embodiments of the utility model, the base 30 is an insulating member, or the base 30 is provided with an insulating layer at least on the support surface 31. In this way, the electrode assembly 200 can be insulated from the battery case 100 at the base 30, so that the electrode assembly 200 is not easily electrically conductive with the battery case 100, thereby ensuring the normal use of the battery.

In some embodiments of the present utility model, as shown in fig. 4, the bases 30 are disposed in pairs, and two bases 30 of the same pair are disposed at intervals along the extending direction of the first edge 111, and the bases 30 are at least two pairs spaced along the extending direction of the second edge 112. Thus, the two bases 30 are arranged at the same pair to limit the electrode assembly 200 on two sides of the electrode assembly 200 in the direction of the first side 111, the bases 30 do not need to cross the electrode assembly 200, the volume and the weight of the bases 30 are reduced, the liquid retention amount of electrolyte is increased, and the bases 30 are at least two pairs distributed at intervals along the extending direction of the second side 112, so that the electrode assembly 200 can be stably supported in the length direction of the motor assembly 200, and the supporting stability is improved.

Specifically, the bases 30 may be L-shaped, the supporting surfaces 31 may be L-shaped or arc surfaces, two bases 30 of each pair are disposed opposite to each other along the extending direction of the first edge 111, and the supporting surfaces 31 are disposed opposite to each other.

In some embodiments of the present utility model, as shown in fig. 5 and 6, the battery case 100 further includes at least one insulating film 40, the insulating film 40 being positioned above the base plate 11, the insulating film 40 being disposed along the extending direction of the first side 111, two bases 30 of the same pair being connected to the insulating film 40, wherein the insulating film 40 is connected to a surface of the base 30 facing the base plate 11, or the insulating film 40 is connected to a surface of the other base 30 of the same pair facing the base 30. The two bases 30 of the same pair are connected to the insulating film 40 such that the insulating film 40 can separate the portion of the electrode assembly 200 between the two bases 30 of the same pair from the battery case 100, so that the motor assembly 200 and the battery case 100 are not easily electrically conductive, and normal use of the battery is ensured.

Specifically, the length of the insulating film 40 may be equal to or greater than the length between the two faces of the two bases 30 of the same pair facing each other and equal to or less than the length of the first side 111, and preferably, the length of the insulating film 40 may be equal to the length between the two faces of the two bases 30 of the same pair facing each other or equal to the length of the first side 111.

Of course, in other embodiments, the two bases 30 of the same pair may be connected to an insulating separator or the like, so long as direct contact between the bottom of the electrode assembly 200 and the bottom plate 11 is ensured.

In some embodiments of the present utility model, as shown in FIG. 3, the minimum height of the support surface 31 is a _min ，a _min 3mm-5mm. Thus, when the electrode assembly 200 is impacted or pressed, the electrode assembly 200 is not easy to contact with the bottom plate 11 positioned between the two paired bases 30, and the gap between the electrode assembly 200 and the bottom plate 11 plays an insulating role, so that the electrode assembly 200 is not easy to conduct electricity with the battery case 100, and the normal use of the battery is ensured.

Specifically, the minimum height a of the support surface 31 _min May be 3mm, 3.5mm, 4mm, 4.3mm, 5mm, etc.

Of course, it will be appreciated that the minimum height a of the support surface 31 _min But may also be less than 3mm or greater than 5mm. For example, 1mm, 1.5mm, 1.7mm, 2mm, 2.3mm, etc.; or 5.3mm, 5.7mm, 6mm, etc.

In some embodiments of the utility model, the base 30 is a piece of resilient material and the difference in height between the compressed and uncompressed state at any point on the support surface 31 is in the range 1mm to 1.5mm. By setting the base 30 as an elastic material piece, the base 30 can play a role in buffering the electrode assembly 200 when the battery is impacted, so that the electrode assembly 200 is not easy to damage, the battery is protected, and the service life of the battery is prolonged. The range of the height difference between the compression state and the non-compression state of any point on the supporting surface 31 is set to be 1mm-1.5mm, so that when the electrode assembly 200 is impacted and pressed against the supporting surface 31, a gap of 2mm-3.5mm can still be formed between the electrode assembly 200 and the bottom plate 11, the insulation effect can still be achieved, the electrode assembly 200 is not easy to conduct electricity with the battery shell 100, and the normal use of the battery is ensured.

Specifically, the base 30 may be a material member having a buffer, for example, a rubber material member, a Pp material member to which a toughness agent is added, a PU sponge material member, or the like. The range of the height difference between the compressed state and the uncompressed state at any point on the support surface 31 may be 1mm, 1.1mm, 1.3mm, 1.5mm, or the like.

In some embodiments of the present utility model, as shown in fig. 7, the battery case 100 further includes an insulating plate 50 positioned in the cavity, the insulating plate 50 including a first plate region 51, a second plate region 52 and a third plate region 53, the first plate region 51 being positioned on the base plate 11, the second plate region 52 being connected to one side of the first plate region 51, the third plate region 53 being connected to the other side of the first plate region 51, the electrode assembly 200 being positioned between the first plate region 51, the second plate region 52 and the third plate region 53, and the base 30 being fixedly connected to the first plate region 51. The electrode assembly 200 is spaced apart from the battery case 100 by providing the insulating plate 50 such that the electrode assembly 200 is connected with the battery case 100 in an insulating manner. The first plate region 51 separates the electrode assembly 200 from the bottom plate 11, and the second and third plate regions 52 and 53 separate the electrode assembly 200 from the side plate 12, thereby making an insulating connection between the electrode assembly 200 and the battery case 100.

Specifically, the length of the side of the second plate region 52 connected to the first plate region 51 may be greater than the length of the first plate region 51 at the side, and the length of the side of the third plate region 53 connected to the first plate region 51 may be greater than the length of the first plate region 51 at the side, so that the second plate region 52 and the third plate region 53 may be connected by bending such that the electrode assembly 200 can be insulated from the battery case 100 at the other two sides of the first plate region 51 different from the second plate region 52 and the third plate region 53.

Of course, it is understood that the insulating plate 50 may also include a fourth plate region and a fifth plate region, which connect the first plate region 51 differently from the second plate region 52 and the third plate region 53 on both outer sides.

In the installation, the base 30 may be first installed on the insulating plate 50, and then the insulating plate 50 is installed into the cavity of the case body 10.

In some embodiments of the present utility model, as shown in FIG. 3, a lightening hole 32 is provided in the base 30. By providing the weight reducing hole 32 in the base 30, the weight of the battery can be reduced and the liquid retention amount of the battery can be increased.

It will be appreciated that the shape, aperture, number and location of the lightening holes 32 are not limited. The lightening holes 32 may be randomly distributed along a certain direction or uniformly distributed. For example, the lightening holes 32 may be distributed along the extending direction of the first side 111, along the extending direction of the second side 112, along the direction of the support surface 31 to the floor 11, or the like. The lightening holes 32 may be round holes, square holes, irregular holes, etc. The lightening holes 32 may be provided in one, two, four, five, etc.

As shown in fig. 8 and 9, the energy storage device 1000 according to the second aspect of the present utility model includes the battery case 100, the electrode assembly 200 and the leads 300 of the above-described embodiment, the electrode assembly 200 is located in the cavity, the lengthwise direction of the electrode assembly 200 is disposed along the second side 112 of the bottom plate 11 of the battery case 100, the base 30 of the battery case 100 is located on the bottom plate 11 and contacts the electrode assembly 200 through the supporting surface 31, and the two bases 30 are located at both ends of the electrode assembly 200 in the lengthwise direction; one end of the lead 300 is connected to a pole on the cap assembly 20, and the other end of the lead 300 is connected to the electrode assembly 200.

Specifically, the energy storage device 1000 includes the battery case 100 in the above embodiment, the electrode assembly 200 is disposed in the cavity of the battery case 100, the longitudinal direction of the electrode assembly 200 is disposed along the second side 112 of the bottom plate 11 of the battery case 100, and two bases 30 are disposed at both ends of the electrode assembly 200 in the longitudinal direction, so that the two bases 30 can support the electrode assembly 200 in the longitudinal direction of the electrode assembly 200, and the bases 30 are in contact with the electrode assembly 200 through the supporting surface 31, thereby improving the stability of the electrode assembly 200 supported by the bases 30, and further improving the stability and performance of the energy storage device 1000.

According to the energy storage device 1000 of the embodiment of the present utility model, by adopting the battery case 100 in the above embodiment, stability and performance of the energy storage device 1000 are improved, and meanwhile, assembly efficiency of the energy storage device 1000 is improved, and production cost is reduced.

In some embodiments, the battery case 100 is an aluminum case, and the top cap assembly 20 and the case body 10 are welded together by laser.

According to a specific application scenario, the energy storage includes aspects of power generation side energy storage, power grid side energy storage, power utilization side energy storage, and the like, and the types of the corresponding energy storage devices 1000 include:

(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.

Fig. 10 is a schematic structural diagram of an application scenario of an energy storage device according to an embodiment of the present application, and the embodiment of fig. 10 of the present application is illustrated by taking a household energy storage scenario in user side energy storage as an example, where the energy storage device of the present application is not limited to the household energy storage scenario.

The application provides a household energy storage system, this household energy storage system include electric energy conversion device 2000 (photovoltaic board), first user load 3000 (street lamp), second user load 4000 (for example household appliances such as air conditioner) etc. and energy storage device 1000, and energy storage device 1000 is small-size tank, and accessible hanging mode is installed in outdoor wall. In particular, the photovoltaic panel may convert solar energy into electric energy during low electricity price periods, and the energy storage device 1000 is used to store the electric energy and supply the electric energy to street lamps and household appliances for use during electricity price peaks, or to supply power during power outage/power outage of the power grid.

Fig. 11 is a schematic structural diagram of an application scenario of an energy storage device 1000 according to another embodiment of the present application, and the embodiment of fig. 11 of the present application is illustrated by taking a power transmission/distribution side shared energy storage scenario as an example, and the energy storage device 1000 of the present application is not limited to the power transmission/distribution side energy storage scenario.

The application provides an energy storage system, the energy storage system includes: the high-voltage cable 5000, the first electric energy conversion device 6000, the second electric energy conversion device 7000 and the energy storage device 100 provided by the application, under the power generation condition, the first electric energy conversion device 6000 and the second electric energy conversion device 7000 are used for converting other forms of energy into electric energy, are connected with the high-voltage cable 5000 and are supplied to the power utilization side of the distribution network for use, and when the power utilization load is lower, the first conversion device 6000 and the second electric energy conversion device 7000 store multiple generated electric energy into the energy storage device 1000 when the power generation is excessive, so that 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 utilization load is high, the power grid gives an instruction, the electric quantity stored by the energy storage device 100 is cooperated with the high-voltage cable 5000 to transmit electric energy to the power utilization side for use in a grid-connected mode, multiple 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.

Alternatively, the first and second power conversion devices 6000 and 7000 may convert at least one of solar energy, optical energy, wind energy, thermal energy, tidal energy, biomass energy, mechanical energy, etc. into the electric energy.

The number of the energy storage devices 1000 may be plural, and the energy storage devices 1000 may be connected in series or parallel to each other, and the energy storage devices 1000 are supported and electrically connected by using a separator (not shown). In the present embodiment, "a plurality of" means two or more. An energy storage tank may be further disposed outside the energy storage device 1000, for accommodating the energy storage device 1000.

Alternatively, energy storage device 1000 may include, but is not limited to, a single battery, a battery module, a battery pack, a battery system, and the like. The practical application form of the energy storage device 1000 provided in the embodiment of the present application may be, but is not limited to, the listed products, and may also be other application forms, and the embodiment of the present application does not strictly limit the application form of the energy storage device 1000. The embodiment of the present application will be described by taking the energy storage device 1000 as a multi-core battery as an example. When the energy storage device 1000 is a single battery, the energy storage device 1000 may be at least one of a cylindrical battery, a prismatic battery, and the like.

The powered device 10000 according to the embodiment of the third aspect of the present utility model includes the energy storage device 1000 in the embodiment of the second aspect.

In this application, the structure of the electric device 10000 is not limited. For example, powered device 10000 may be a mobile device such as a vehicle, a ship, or a small aircraft, and includes a power source including energy storage device 1000 described above. The power provided by the energy storage device 1000 provides a driving force for the powered device 10000. The mobile device may be a pure electric device, i.e. the driving force of the electric device 10000 is all electric energy, and the power source only includes the energy storage device 1000. The mobile device may also be a hybrid power device, and the power source includes other power devices such as the energy storage device 1000 and the engine. Taking a vehicle as an example, in some embodiments, the electric device 10000 is a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, an extended range vehicle, an electric tricycle, a two-wheel electric vehicle, or the like.

For another example, the electric device 10000 is an energy storage device such as an energy storage cabinet, and can be used as a charging cabinet of a mobile device or as an energy storage device of other devices. For example, the solar power generation equipment can be provided with an energy storage cabinet, and electric energy generated by solar power generation is temporarily stored in the energy storage cabinet so as to be used for devices such as street lamps and bus stop boards.

According to the electric equipment 10000 provided by the embodiment of the utility model, by adopting the energy storage device 1000, the stability and the assembly efficiency of the electric equipment 10000 are improved, and the production cost is reduced.

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

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery case, comprising:

the electrode assembly comprises a shell body (10), wherein the shell body (10) comprises a bottom plate (11) and a side plate (12) connected with the edge of the bottom plate (11), the bottom plate (11) and the side plate (12) enclose a cavity with an opening (10 a) at one end, the edge of the bottom plate (11) comprises two first edges (111) and a second edge (112) connected with the first edges (111), and the second edges (112) are arranged along the length direction of the electrode assembly (200);

a cap assembly (20), the cap assembly (20) covering the opening (10 a);

at least two bases (30), wherein the at least two bases (30) are positioned on the bottom plate (11), two bases (30) are respectively arranged adjacent to two first edges (111), and the surface of the base (30) facing the opening (10 a) comprises a supporting surface (31);

the vertical distance between the supporting surface (31) and the surface of the bottom plate (11) adjacent to the base (30) is the height of the supporting surface (31), and the height of the supporting surface (31) gradually decreases from the end point of the first edge (111) to the center of the first edge (111).

2. The battery housing according to claim 1, characterized in that the base (30) is an insulating member or that the base (30) is provided with an insulating layer at least on the support surface (31).

3. The battery case according to claim 2, wherein the bases (30) are arranged in pairs, with two of the bases (30) of a pair being spaced apart along the direction of extension of the first side (111);

the bases (30) are at least two pairs which are distributed at intervals along the extending direction of the second edge (112).

4. A battery housing according to claim 3, further comprising at least one insulating film (40), said insulating film (40) being located above said bottom plate (11);

the insulating film (40) is arranged along the extending direction of the first edge (111), and the two bases (30) of the same pair are connected to the insulating film (40);

wherein the insulating film (40) is attached to a surface of the base (30) facing the base plate (11), or the insulating film (40) is attached to a surface of the other base (30) facing the same pair of bases (30).

5. Battery housing according to claim 2, characterized in that the minimum height of the support surface (31) is a _min ，a _min 3mm-5mm.

6. The battery housing according to claim 5, wherein the base (30) is an elastic material piece and the height difference in a compressed state and a non-compressed state of any point on the support surface (31) ranges from 1mm to 1.5mm.

7. The battery case according to claim 1, further comprising an insulating plate (50) located within the cavity, the insulating plate (50) comprising:

-a first plate area (51), said first plate area (51) being located on said bottom plate (11);

-a second plate area (52), said second plate area (52) being connected to one side of said first plate area (51);

a third plate region (53), the third plate region (53) being connected to the other side of the first plate region (51), the electrode assembly being located between the first plate region (51), the second plate region (52) and the third plate region (53);

the base (30) is fixedly connected to the first plate area (51).

8. The battery housing according to any one of claims 1 to 7, wherein the base (30) is provided with a lightening hole (32).

9. An energy storage device, comprising:

the battery housing (100) according to any one of claims 1-8;

an electrode assembly (200), wherein the electrode assembly (200) is positioned in the cavity, the length direction of the electrode assembly (200) is arranged along the second side (112) of the bottom plate (11) of the battery shell (100), the base (30) of the battery shell (100) is positioned on the bottom plate (11) and is contacted with the electrode assembly (200) through a supporting surface (31), and two bases (30) are positioned at two ends of the electrode assembly (200) in the length direction;

and one end of the pin (300) is connected with a pole column on the top cover assembly (20), and the other end of the pin (300) is connected with the electrode assembly (200).

10. A powered device, characterized by comprising an energy storage device (1000) according to claim 9.