CN221304779U - Battery, energy storage device and energy storage power station - Google Patents

Abstract

The application relates to a battery, an energy storage device and an energy storage power station, comprising: a plurality of groups of batteries, wherein each group of batteries is provided with a penetrating sub-runner; a bracket; and a plurality of groups of batteries are stacked on the support along the first direction, and sub-flow passages of all the batteries are sequentially communicated end to form a heat dissipation flow passage along the first direction. The battery, the energy storage device and the energy storage power station have the advantage of low cost.

Description

Battery, energy storage device and energy storage power station

Technical Field

The application relates to the technical field of batteries, in particular to a battery, an energy storage device and an energy storage power station.

Background

An energy storage power station performs a system of devices for the storage, conversion and release of recyclable electrical energy by means of electrochemical cells or electromagnetic energy storage media. The battery is limited by the self volume of the energy storage power station, the placement density of the battery in the energy storage power station is higher, a large amount of heat can be generated when the battery is in concentrated operation, and a corresponding cooling and radiating device is required to be configured for solving the problem of overheating of the battery at present, but the cost of the cooling and radiating device is generally higher.

Disclosure of Invention

Based on this, it is necessary to provide a battery, an energy storage device and an energy storage power station for the problem of high cost.

A first aspect of the present application provides an energy storage device comprising: a plurality of groups of batteries, wherein each group of batteries is provided with a penetrating sub-runner; a bracket; and a plurality of groups of batteries are stacked on the support along the first direction, and sub-flow passages of all the batteries are sequentially communicated end to form a heat dissipation flow passage along the first direction.

By arranging all the sub-flow passages of the batteries to be communicated end to end in sequence to form a heat dissipation flow passage along the first direction, air can lift along the heat dissipation flow passage with heat generated by a plurality of groups of batteries, so that the heat of the batteries is taken away, the batteries are kept in a proper temperature range to work, the good performance of the batteries is ensured, and the service life of the batteries is prolonged; and other cooling and radiating devices are not required to be arranged independently, the temperature of the battery is controlled through the radiating flow channel, and the whole cost is low.

In one embodiment, the battery includes a case and a plurality of cells; the sub-runner is arranged in the box body in a penetrating mode, a plurality of battery cells are arranged in the box body, and the battery cells are arranged on the periphery of the sub-runner in a surrounding mode. Therefore, the heat generated by the battery cell is diffused to the surrounding air, the hot air is discharged from the sub-runner along the heat dissipation runner, the heat generated by the battery cell is taken away, cold air with relatively low temperature is supplemented into each box body, the battery cell can be ensured to work in a proper temperature range, and the service life of the battery cell is prolonged.

In one embodiment, the box body comprises a box cover and a box body with one side open; the box cover is covered on the opening side of the box body so as to jointly define an accommodating space; the plurality of battery cells are arranged in the accommodating space; the sub-runner penetrates through the case cover and the case body. Thus, the liquid or other foreign matters can be prevented from affecting the charge or discharge of the battery cell.

In one embodiment, a bottom wall of the box body facing the opening side is formed with a penetrating vent, and the box cover is turned outwards to form a penetrating connecting cylinder at one side facing away from the accommodating space; the vent and the connecting cylinder form the sub-runner.

In one embodiment, when a plurality of groups of the batteries are stacked on the support along the first direction, the connecting cylinder of the battery of the next group is abutted against the vent of the battery of the previous group. Therefore, the heat dissipation flow channel is relatively closed, and external air cannot enter the sub flow channel from the area between any two groups of batteries; the individual battery cells generate polluted smoke, and air convection generated by the closed flow channel can be more beneficial to exhausting the smoke in the box body, so that the smoke is prevented from flowing around and overflowing.

In one embodiment, the housing comprises a deformation element, which is arranged on the distal end of the connecting tube facing away from the receiving space. Therefore, the gap between the vent and the far end of the connecting tube deviating from the containing space due to the length tolerance problem can be avoided, and the tightness between the vent and the connecting tube of the upper and lower batteries is ensured

In one embodiment, the vent is square, circular or triangular.

In one embodiment, the bracket comprises a plurality of mounting pieces which are arranged at intervals along a first direction, and the distance between two adjacent mounting pieces along the first direction is equal to the length of the sub-runner along the first direction; the batteries are correspondingly arranged on the mounting pieces respectively; at least part of the mounting piece is hollowed out so as to avoid the sub-runner.

In one embodiment, the bracket includes a support plate; the mounting piece comprises at least two supporting rods which are arranged at intervals relatively, one end of each supporting rod is fixed on the supporting plate, and the supporting rods extend along the second direction; the first direction intersects the second direction.

In one embodiment, the energy storage device comprises a master controller; the master controller is in control connection with each battery; the bracket comprises a bottom plate; the bottom plate is fixed at the bottom end of the supporting plate along the first direction; the master controller is arranged on the bottom plate, and a gap is reserved between the master controller and the adjacent mounting piece. Therefore, cold air with relatively low temperature enters from the installation area at the bottommost end and reaches the ventilation opening of the battery at the bottommost side through the gap, the cold air flows upwards from bottom to top in the heat dissipation flow channel along the first direction, heat generated by the battery cells in each battery is taken away in sequence, heated hot air is discharged from the opening of the connecting cylinder of the battery at the topmost side, natural air convection is formed, the cost is low, the battery cells can be ensured to be kept to work in a proper temperature interval, and the service life of the battery cells is prolonged.

In one embodiment, the energy storage device comprises a pumping structure; the air extraction structure is arranged at least one end of the heat dissipation flow channel along the first direction.

A second aspect of the present application provides an energy storage power station comprising a cabinet and at least one energy storage device as described above; the energy storage device is arranged in the cabinet body.

A third aspect of the present application provides a battery applied to the energy storage device, where the battery is formed with a through sub-flow channel.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Fig. 1 is a schematic structural diagram of an energy storage device according to some embodiments of the present application.

Fig. 2 is a top view of an energy storage device according to some embodiments of the present application.

Fig. 3 is a cross-sectional view A-A of the structure shown in fig. 2, wherein single-line arrows are used to indicate the direction of air flow.

Fig. 4 is an enlarged view of region B of the structure shown in fig. 3.

Fig. 5 is an exploded view of a battery provided in some embodiments of the present application.

Fig. 6 is a C-C cross-sectional view of the structure shown in fig. 5.

Fig. 7 is a schematic structural view of a battery module according to some embodiments of the present application.

Fig. 8 is an exploded view of a battery cell according to some embodiments of the present application.

Fig. 9 is a schematic structural diagram of a bracket according to some embodiments of the present application.

Fig. 10 is a schematic structural view of a mounting member according to some embodiments of the present application.

Fig. 11 is a schematic structural diagram of an energy storage device according to some embodiments of the present application.

In the figure, the direction indicated by X is the first direction, and the direction indicated by Y is the second direction.

Reference numerals illustrate:

The battery-100, the box body-110, the box cover-111, the box body-112, the bottom wall-113, the ventilation opening-114, the connecting cylinder-115, the deformation piece-116, the battery core-121, the sub-runner-130, the heat dissipation runner-300, the bracket-400, the mounting piece-410, the supporting rod-411, the supporting plate-420, the bottom plate-430, the main controller-600, the gap-610, the air extraction structure-700 and the waterproof cover-710.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, these terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance or order of number of features, particular order, or order of primary or secondary relationships of such features.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the terms "plurality" and "a plurality" mean at least two (including two), such as two, three, etc., unless specifically defined otherwise. Similarly, the terms "plurality of sets" and "plurality of sets" when present refer to more than two sets (including two sets), and the terms "plurality of sheets" when present refer to more than two sheets (including two sheets).

In the description of the embodiments of the present application, if there are such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter-clockwise", "axial", "radial", "circumferential", etc., these terms refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In describing embodiments of the present application, unless otherwise explicitly indicated and limited thereto, the terms "mounted," "connected," "secured," and the like should be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through 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.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and various fields such as aerospace and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the related art, the cooling scheme of the battery often comprises a cold plate, cooling liquid, a pump and the like, and when the battery is applied to an energy storage power station, corresponding pipelines are required to be arranged, so that the configuration is complex and the cost is high; therefore, the energy storage power station is often cooled by installing an air conditioner and refrigerating the power station room by utilizing the air conditioner, and the mode is suitable for being used in areas with relatively hot weather; however, in severe cold areas, if an air conditioner is used to control the temperature of the energy storage power station, a large amount of electric energy is wasted, resulting in extremely high cost.

In order to alleviate the problem of high cost, the battery stack can be placed and the heat dissipation flow channel is designed, so that the purpose of low-cost heat dissipation is realized by utilizing the natural rising of hot air.

A first aspect of the application provides an energy storage device for integration in an energy storage power station for providing emergency power.

Fig. 1 is a schematic structural diagram of an energy storage device according to some embodiments of the present application; FIG. 2 is a top view of an energy storage device according to some embodiments of the present application; FIG. 3 is a cross-sectional view A-A of the structure shown in FIG. 2; fig. 4 is an enlarged view of region B of the structure shown in fig. 3. Referring to fig. 1 to 4, the energy storage device includes: multiple sets of batteries 100 and a cradle 400.

Wherein each group of cells 100 is formed with a through sub-flow channel 130; the sub-flow channels 130 are generally disposed along a first direction; the plurality of sets of cells 100 are stacked on the support 400 in the first direction. Specifically, the bracket 400 includes a plurality of mounting members 410 spaced apart along a first direction; each battery 100 is correspondingly mounted on one of the mounting members 410. When a plurality of groups of the cells 100 are stacked on the support 400 along the first direction, specifically, a plurality of groups of the cells 100 are respectively and correspondingly placed on a plurality of mounting members 410, the sub-flow channels 130 of all the cells 100 are sequentially connected end to form the heat dissipation flow channel 300 along the first direction. In this way, the air can lift along the heat dissipation flow channel 300 with the heat generated by the plurality of groups of batteries 100, so as to take away the heat of the batteries 100, so that the batteries 100 can work in a proper temperature interval, the good performance of the batteries 100 is ensured, and the service life of the batteries 100 is prolonged; and other cooling and radiating devices are not required to be arranged independently, the temperature of the battery is controlled through the radiating runner 300, and the whole cost is low.

It should be noted that, in the embodiment of the present application, the first direction may be a vertical direction; in this way, the two ends of the heat dissipation flow channel 300 along the vertical direction are respectively formed with openings, and the heat generated by the plurality of groups of batteries 100 is discharged from the top opening of the heat dissipation flow channel 300 by utilizing the principle that the air is heated and naturally rises, so that the heat generated by the batteries 100 is taken away, and the cool air with relatively low temperature is supplemented into the bottom opening of the heat dissipation flow channel 300, so that natural gas convection is formed, the cost is low, and the batteries 100 can be ensured to work in a proper temperature range.

In addition, in the embodiment of the present application, the first direction may be other horizontal directions, and a fan or a negative pressure pump is used to generate a corresponding air pressure difference at the openings at two ends of the heat dissipation flow channel 300, so as to push air to flow along the heat dissipation flow channel 300, thereby continuously taking away the heat generated by the battery 100, and supplementing the cool air with relatively low temperature into the bottom opening of the heat dissipation flow channel 300, so as to ensure that the battery 100 keeps working in a suitable temperature range.

Fig. 5 is an exploded view of a battery provided in some embodiments of the application; FIG. 6 is a C-C cross-sectional view of the structure shown in FIG. 5; fig. 7 is a schematic view illustrating a structure of a battery module according to some embodiments of the present application; fig. 8 is an exploded view of a battery cell according to some embodiments of the present application. Referring to fig. 5 to 8, the battery 100 includes a case 110 and a plurality of battery cells 121; the sub-runner 130 penetrates through the box body 110, a plurality of electric cores 121 are arranged in the box body 110, and the electric cores 121 are arranged on the periphery of the sub-runner 130 in a surrounding mode; in this way, the heat generated by the battery cells 121 is diffused to the surrounding air, the hot air is discharged from the sub-flow channels 130 along the heat dissipation flow channels 300, the heat generated by the battery cells 121 is taken away, the cool air with relatively low temperature is supplemented into each box 110, the battery cells 121 can be ensured to keep working in a proper temperature range, and the service life of the battery cells 121 is prolonged.

It should be noted that, in the embodiments of the present application, the battery cell 121 refers to the smallest unit that constitutes the battery module 120 or the battery pack. Multiple cells 121 may be connected in series and/or parallel via electrode terminals for use in various applications. The battery 100 referred to in the present application is a battery pack. The case 110 is used for accommodating the battery cells 121 or the battery module 120 to prevent the liquid or other foreign matters from affecting the charge or discharge of the battery cells 121.

The case 110 may take a variety of configurations.

In some possible embodiments, the case 110 includes a case cover 111 and a case body 112 opened at one side. The case body 112 may have a hollow structure with an opening at a top end side, the case cover 111 may have a plate-like structure, and the case cover 111 is covered on the opening side of the case body 112 so that the case cover 111 and the case body 112 define a receiving space together; the plurality of battery cells 121 are arranged in the accommodating space; the sub flow path 130 penetrates the case cover 111 and the case body 112.

The case cover 111 and the case body 112 may each have a hollow structure with one side open, and the open side of the case cover 111 may be closed to the open side of the case body 112. Of course, the case 110 formed by the case cover 111 and the case body 112 may have various shapes, for example, a simple three-dimensional structure such as a rectangular parallelepiped, a cylinder, or a sphere, or a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped, a cylinder, or a sphere, which is not limited in the embodiment of the present application. The material of the case 110 may be an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the plurality of battery cells 121 may directly form a battery pack, or may first form the battery module 120, and then form the battery pack by the battery module 120. Specifically, the multiple electric cores 121 may be directly connected in series, in parallel, or in series-parallel to form a whole, and then the whole formed by the multiple electric cores 121 is accommodated in the case 110. The battery modules 120 may be formed by connecting a plurality of battery cells 121 in series or parallel or series-parallel connection, and the battery modules 120 are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 110.

The battery 100 may also include other structures, for example, the battery 100 may also include a bus bar member for making electrical connection between the plurality of battery cells 121.

In the embodiment of the present application, each of the battery cells 121 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The cell 121 may be cylindrical, flat, rectangular, or other shape. The cells 121 are generally divided into three types in a packaged manner: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this way. However, for simplicity of description, the square lithium ion cell 121 is taken as an example in the following embodiments.

Referring to fig. 8, the battery cell 121 includes an end cap 122, a case 123, an electrode assembly 124, and other functional components.

The end cap 122 refers to a member that is covered at the opening of the case 123 to isolate the internal environment of the electrode assembly 124 from the external environment. Without limitation, the shape of end cap 122 may conform to the shape of housing 123 to mate with housing 123. Optionally, end cap 122 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that end cap 122 is not easy to deform when being extruded and bumped, so that cell 121 can have a higher structural strength, and the safety performance can be improved. The end cap 122 may be provided with functional parts such as electrode terminals 125. The electrode terminal 125 may be used to electrically connect with the electrode assembly 124 for outputting or inputting electric power to the battery cell 121. In some possible embodiments, a pressure relief mechanism may also be provided on end cap 122 for relieving the internal pressure of cell 121 when the internal pressure or temperature reaches a threshold. The material of the end cap 122 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some possible embodiments, insulation may also be provided on the inside of end cap 122, which may be used to isolate electrical connection components within housing 123 from end cap 122 to reduce the risk of shorting. By way of example, the insulation may be plastic, rubber, or the like.

Housing 123 is an assembly for mating with end cap 122 to form the internal environment of cell 121, where the internal environment formed may be used to house electrode assembly 124, electrolyte, and other components. Housing 123 and end cap 122 may be separate components, and an opening may be provided in housing 123 to create an internal environment for cell 121 by closing end cap 122 at the opening. Without limitation, end cap 122 and housing 123 may be integrated, specifically, end cap 122 and housing 123 may form a common connection surface prior to the insertion of the other components into the housing, and when it is desired to encapsulate the interior of housing 123, end cap 122 is then allowed to cover housing 123. The housing 123 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 123 may be determined according to the specific shape and size of the electrode assembly 124. The material of the housing 123 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The electrode assembly 124 is a component in which electrochemical reactions occur in the battery cell 121. The case 123 may contain one or more electrode assemblies 124 therein. The electrode assembly 124 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body portion of the electrode assembly 124, and the portions of the positive and negative electrode sheets having no active material each constitute a tab (not shown). The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected to the electrode terminal 125 to form a current loop.

In some possible embodiments, referring to fig. 5 and 6, the bottom wall 113 of the case body 112 facing the opening side is formed with a through vent 114, and the case cover 111 is turned outwards to a side facing away from the accommodating space to form a through connection cylinder 115; the vent 114 and the connecting cylinder 115 form a sub-flow path 130.

The projected shape of the vent 114 may be square, circular, or triangular in regular geometry; but also irregular geometries formed by overlapping regular geometries. The connecting cylinder 115 may be made of an alloy material such as aluminum alloy or iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam, and the connecting cylinder 115 and the cover 111 may be integrally connected, or they may be separately processed and then integrally connected by welding, bolting, or the like. The cross-sectional shape of the connecting cylinder 115 generally conforms to, i.e., conforms to or approximates, the shape of the vent 114.

Relatively low-temperature cold air enters the box cover 111 from the ventilation opening 114 and together defines an accommodating space with the box body 112, heat generated by the battery cells 121 is diffused to surrounding air, the air after heat exchange can be discharged upwards from the connecting cylinder 115 along the first direction, heat generated by the battery cells 121 is taken away, the battery cells 121 are ensured to keep working in a proper temperature range, and the service life of the battery cells 121 is prolonged.

In some possible embodiments, the heat dissipation flow channel 300 belongs to a semi-closed flow channel, and gaps may be formed between the sub flow channels 130 of the case 120 of each battery 100, so that cold air with relatively low temperature may enter the heat dissipation flow channel 300 from the gaps between the sub flow channels 130 of two adjacent batteries 100, thereby ensuring that the air temperature in the heat dissipation flow channel 300 is relatively low, the heat exchange efficiency with the battery cells 121 is high, the heat generated by the battery cells 121 can be continuously taken away, and the gas convection is formed, so that the cost is low, and the battery 100 can be ensured to keep working in a suitable temperature interval, and the service life is prolonged.

In other possible embodiments, the heat dissipation runner 300 belongs to a closed runner. Referring to fig. 3, when a plurality of battery packs 100 are respectively placed on a plurality of mounting members 410 of a rack 400, a connecting cylinder 115 of a next battery pack 100 abuts against a vent 114 of a previous battery pack 100.

Heat generated during the operation of the cell 121 is diffused into the case 110; the cool air having a relatively low temperature enters the case 110 from the vent 114 of the battery 100 at the bottom end side, takes away the heat generated from the battery cells 121, and enters the vent 114 of the battery 100 of the previous group from the connection cylinder 115 of the battery 100, so that the heat of the battery 100 of the plurality of groups can be discharged upward along the heat dissipation flow channel 300 from the sub flow channel 130 and from the top end opening along with the air, and the above-mentioned circulation is repeated, thus, natural gas convection is formed, the cost is low, and the battery 100 can be ensured to operate in a proper temperature range.

The connecting cylinder 115 of the next group of batteries 100 is abutted against the vent 114 of the previous group of batteries 100, so that the sealing performance is good, the heat dissipation runner 300 belongs to a closed runner, the heat dissipation runner 300 is relatively closed to the outside, and the outside air cannot enter the sub-runner 130 from the area between any two groups of batteries 100; once the individual cells 121 generate polluted smoke, the air convection generated by the closed flow channel can be more beneficial to exhausting the smoke in the box 110, so as to prevent the smoke from flowing around.

In some embodiments, the housing 110 includes a deforming member 116, the deforming member 116 being disposed on a distal end of the connecting tube 115 facing away from the receiving space. In this way, when the connecting cylinder 115 of the next battery 100 abuts against the vent 114 of the previous battery 100, the deforming member 116 located at the distal end of the connecting cylinder 115 facing away from the accommodating space abuts against the peripheral edge region of the vent 114, and the abutting pressure between the deforming member 116 and the connecting cylinder can cause the deforming member 116 to deform properly, so that hard contact is avoided, and a gap remaining between the distal end of the connecting cylinder 115 facing away from the accommodating space and the vent 114 due to the length tolerance problem can also be avoided, thereby ensuring tightness between the connecting cylinder 115 and the vent 114 of the upper battery 100 and the lower battery 100.

Alternatively, deforming member 116 may be a rubber ring.

In some possible embodiments, referring to fig. 1-8, the spacing between two adjacent mounts 410 in the first direction is equal to the length of the sub-flow channel 130 in the first direction; in this way, through the designed length, the connecting cylinder 115 of the next group of batteries 100 can be abutted against the ventilation opening 114 of the previous group of batteries 100, so that the closed heat dissipation flow channel 300 is formed, and the flue gas in the box body 110 of each battery 100 can be more effectively discharged, so that the flue gas is prevented from flowing around and overflowing.

The mounting member 410 is at least partially hollowed out. In this way, on the one hand, the hollowed-out area of the mounting piece 410 is just located at the bottom side of the case 110 of the battery 100, so that the heat dissipation area of the battery 100 is further increased, and the battery 100 is kept to work in a proper temperature range; thereby ensuring good performance of the battery 100 and extending the service life of the battery 100; on the other hand, at least part of the area of the mounting piece 410 is hollowed out to avoid the sub-runner 130; the connecting cylinder 115 of the next battery 100 passes through the hollowed-out area of the mounting member 410 along the first direction and abuts against the peripheral area of the vent 114 of the previous battery 100.

In some possible embodiments, referring to fig. 1-9, the bracket 400 includes a support plate 420. The supporting plate 420 may be a plate structure, or a combined structure formed by overlapping a plurality of plates; the material of the support plate 420 may be an alloy material such as an aluminum alloy or an iron alloy, or a polymer material such as a plastic, which is not limited in the embodiment of the present application.

The structure of the mounting member 410 can be varied.

Referring to fig. 10, the mounting member 410 is a whole plate with a hollow center, and the hollow area extends to one side thereof to form an opening, and the side opposite to the opening is fixed on the supporting plate 420.

As shown in connection with fig. 9, the mount 410 may include at least two struts 411 disposed in a relatively spaced apart relationship. The rod 411 is generally elongated, and the material of the rod 411 may be an alloy material such as an aluminum alloy or an iron alloy, which is not limited in the embodiment of the present application.

One end of the strut 411 is fixed to the support plate 420, and the strut 411 extends in a second direction, the first direction generally intersecting the second direction. In each mounting piece 410, the area between the two support rods 411 is used as a hollowed-out area, so that on one hand, the heat dissipation area of the battery 100 can be increased, and the battery 100 can be kept to work in a proper temperature range; thereby ensuring good performance of the battery 100 and extending the service life of the battery 100; on the other hand, the area between the two struts 411 may also avoid the sub-flow channel 130; the connecting cylinder 115 of the next battery 100 passes through the region between the two struts 411 in the first direction and abuts against the peripheral region of the vent 114 of the previous battery 100.

Alternatively, the second direction may be a horizontal direction, and the first direction is disposed perpendicular to the second direction.

In some possible embodiments, referring to fig. 1 and 11, the energy storage device includes a master 600; the main controller 600 controls the connection of the respective batteries 100. The master 600 may be a Battery management system (Battery MANAGEMENT SYSTEM) that is a device for coordinating monitoring of the status of the individual batteries 100. The battery management system mainly has the functions of intelligently managing and maintaining each battery 100, preventing the battery 100 from being overcharged and overdischarged, prolonging the service life of the battery 100 and monitoring the state of the battery 100.

Bracket 400 includes a bottom plate 430; the bottom plate 430 is fixed to the bottom end of the support plate 420 in the first direction. The material of the bottom plate 430 may be an alloy material such as an aluminum alloy or an iron alloy, or a polymer material such as a plastic, which is not limited in the embodiment of the present application.

A mounting area may be formed between the base plate 430 and the adjacent mount 410, the main controller 600 is disposed on the base plate 430, and a gap 610 is formed between the main controller 600 and the adjacent mount 410. As shown in fig. 3, cold air with relatively low temperature enters from the mounting area at the bottommost end and reaches the ventilation opening 114 of the battery 100 at the bottommost end through the gap 610, the cold air flows from bottom to top in the heat dissipation flow channel 300 along the first direction, heat generated by the battery cells 121 in each battery 100 is sequentially taken away, heated hot air is discharged from the opening of the connecting cylinder 115 of the battery 100 at the topmost end, natural air convection is formed, the cost is low, the battery cells 121 can be ensured to be kept to work in a proper temperature range, and the service life of the battery cells 121 is prolonged.

In some possible embodiments, referring to FIG. 11, the energy storage device includes a pumping structure 700; the air extraction structure 700 is disposed at least one end of the heat dissipation flow channel 300 along the first direction. That is, the air extraction structure 700 may be disposed at the nozzle of the connection barrel 115 of the uppermost battery 100, to generate negative pressure, and drive air to flow from bottom to top in the heat dissipation flow channel 300 along the first direction; the air extraction structure 700 may be disposed at the vent 114 of the lowermost battery 100 to generate positive pressure, and the air to be blown flows from the bottom to the top in the heat dissipation flow channel 300 along the first direction.

The bleed structure 700 may be a fan or a negative pressure pump. By utilizing the pressure difference generated by the air extraction structure 700, air can be convected along the first direction in the heat dissipation flow channel 300, so that heat generated by each battery cell 121 is continuously taken away, the battery cells 121 are ensured to work in a proper temperature interval, and the service life of the battery cells 121 is prolonged.

Optionally, referring to fig. 11, the energy storage device includes a waterproof cover 710 disposed above the air extraction structure 700 for preventing the air extraction structure 700 from being wetted by water and short-circuited.

A second aspect of the application provides an energy storage plant comprising a cabinet (not shown) and at least one energy storage device as described above; the energy storage device is arranged in the cabinet body. One or more energy storage devices built in the energy storage power station provide emergency power supply; but not limited to, hospitals, gas stations, large malls, communication stations, data centers, mining areas, and the like.

The battery 100 according to the third aspect of the present application is applied to the energy storage device. The middle of the battery 100 is formed with a sub-flow path 130 therethrough so as to facilitate the formation of the heat dissipation flow path 300.

In addition, the battery 100 in the embodiment of the present application may also have a structure such as a case cover 111, a case body 112, a vent 114, and a connecting cylinder 115, and the functions thereof are the same as those of the corresponding structure in the above embodiment, and will not be described herein.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (13)

1. An energy storage device, comprising:

A plurality of groups of cells (100), each group of cells (100) being formed with a through sub-flow channel (130);

a bracket (400);

And a plurality of groups of batteries (100) are stacked on the bracket (400) along the first direction, and the sub-flow channels (130) of all the batteries (100) are sequentially communicated end to form a heat dissipation flow channel (300) along the first direction.

2. The energy storage device of claim 1, wherein the battery (100) comprises a housing (110) and a plurality of cells (121);

The sub-runner (130) is arranged in the box body (110) in a penetrating mode, a plurality of battery cells (121) are arranged in the box body (110), and the battery cells (121) are arranged on the periphery side of the sub-runner (130) in a surrounding mode.

3. The energy storage device according to claim 2, wherein the case (110) comprises a case cover (111) and a case body (112) opened at one side; the case cover (111) is covered on the opening side of the case body (112) so as to jointly define an accommodating space; a plurality of battery cells (121) are arranged in the accommodating space; the sub flow passage (130) penetrates the case cover (111) and the case body (112).

4. A tank storing device according to claim 3, wherein a bottom wall (113) of the tank body (112) facing the opening side is formed with a through-going vent (114), and the tank cover (111) is turned out to a side facing away from the accommodation space to form a through-going connecting cylinder (115);

The vent (114) and the connecting tube (115) are configured as the sub-flow channel (130).

5. The energy storage device of claim 4, wherein when a plurality of sets of the cells (100) are stacked on the rack (400) in the first direction, the connecting cylinders (115) of a next set of the cells (100) abut the vents (114) of a previous set of the cells (100).

6. The energy storage device according to claim 4, wherein the housing (110) comprises a deformation element (116), the deformation element (116) being arranged on a distal end of the connecting cylinder (115) facing away from the receiving space.

7. The energy storage device of claim 4, wherein the vent (114) is square, circular or triangular.

8. The energy storage device of any of claims 1 to 7, wherein the bracket (400) comprises a plurality of mounting members (410) spaced apart along a first direction, a spacing between two adjacent mounting members (410) along the first direction being equal to a length of the sub-flow channel (130) along the first direction; a plurality of groups of the batteries (100) are respectively and correspondingly arranged on a plurality of the mounting pieces (410); at least part of the mounting piece (410) is arranged in a hollowed-out mode so as to avoid the sub-runner (130).

9. The energy storage device of claim 8, wherein the bracket (400) comprises a support plate (420);

The mounting piece (410) comprises at least two struts (411) which are arranged at intervals relatively, one end of each strut (411) is fixed on the supporting plate (420), and the struts (411) extend along a second direction;

The first direction intersects the second direction.

10. The energy storage device of claim 9, wherein the energy storage device comprises a master controller (600); the master controller (600) is in control connection with each battery (100);

The bracket (400) comprises a bottom plate (430); the bottom plate (430) is fixed at the bottom end of the supporting plate (420) along the first direction;

The master controller (600) is disposed on the bottom plate (430), and a gap (610) is formed between the master controller (600) and the adjacent mounting piece (410).

11. The energy storage device of claim 8, wherein the energy storage device comprises a bleed structure (700);

The air extraction structure (700) is arranged at least one end of the heat dissipation flow channel (300) along the first direction.

12. An energy storage plant comprising a cabinet and at least one energy storage device according to any one of claims 1 to 11; the energy storage device is arranged in the cabinet body.

13. A battery for use in an energy storage device according to any one of claims 1 to 11, wherein the battery (100) is formed with a through-going sub-flow channel (130).