Energy storage device and electric equipment

Abstract

The utility model provides an energy storage device and electric equipment. The energy storage device comprises a battery cabinet, an end plate, a battery cluster and a supporting piece. The battery cabinet comprises a box body, and the box body is provided with an accommodating cavity. The end plates are installed on the battery cabinet and located at the two opposite ends of the containing cavity in the first direction. At least one battery cluster is contained in each containing cavity, the end plates abut against the side faces of the battery clusters, each battery cluster comprises at least two battery monomers arranged in the second direction, and the first direction is perpendicular to the second direction. And one side, far away from the bottom surface of the battery cluster, of each battery monomer is provided with the supporting piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to an energy storage device and an electric equipment. BACKGROUND

[0002] The energy storage device in the related art is mainly composed of a battery as a unit to form a module, the module is integrated into a battery pack, and the battery pack is integrated into a battery cluster. The intermediate process is accompanied by a large number of structural components, such as limiting components, wiring harness devices and other structural components used for fixing between the battery pack and the battery pack, between the battery cluster and the battery cluster. This part of the structural components is relatively complicated and occupies a certain space, resulting in a relatively low space utilization rate in the energy storage prefabricated cabin, reducing the number of batteries, and further resulting in a relatively low energy density of the energy storage prefabricated cabin and a relatively small amount of power storage. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides an energy storage device and an electric equipment.

[0004] In a first aspect, the present application provides an energy storage device including a battery cabinet, an end plate, a battery cluster and a support. The battery cabinet includes a box body provided with a containing cavity. The end plate is installed on the battery cabinet and located at opposite ends of the containing cavity in a first direction. Each containing cavity contains at least one battery cluster, the end plate is in contact with the side surface of the battery cluster, the battery cluster includes at least two battery monomers arranged in a second direction, and the first direction is perpendicular to the second direction. In the second direction, the battery monomer is provided with the support away from one side of the bottom surface of the battery cluster.

[0005] In the technical scheme, the energy storage device directly comprises the battery monomer into the battery cluster, the integration process of the middle process module and the battery pack is omitted, the integration of the energy storage device is improved, the structural members such as the module frame, the battery pack shell, the battery frame, the limiting assembly and the wire harness device are saved, the number of structural members is greatly reduced, the installation space utilization rate in the energy storage device is improved, the number of battery monomers is increased, the energy density of the energy storage device is improved, more electric quantity is stored, the endurance is higher, the assembly process is reduced, and the production speed of the energy storage device is improved. In addition, the battery cluster is carried on the battery cabinet, and the end plate abuts against the side surface of the battery cluster. On the one hand, the battery cluster can provide a clamping force in the first direction X, the clamping force can bear the gravity of the battery monomer in the second direction, the gravity between the battery monomers is avoided, and the battery cluster is firmly fixed in the battery cabinet. The support member is located between two adjacent battery monomers in the second direction, and can support the battery monomer in the second direction, so that the battery monomers are not pressed and broken. The support member is spaced apart from the two adjacent battery monomers, and can provide a containing space and a discharge path for the gas in the case of overheating of the battery monomer and the gas breaking through the explosion-proof valve, avoid the gas diffusing in the battery monomer, and reduce the risk of thermal runaway.

[0006] As an optional technical scheme of the application, the battery cluster further comprises a control box, the control box is arranged at the top of the battery cluster, and the support member is arranged between the control box and the battery monomer in the second direction. The support member comprises opposite top and bottom portions in the second direction, the top portion of the support member is connected with the control box, and the bottom portion of the support member is connected with the battery monomer.

[0007] In the technical scheme, the support member is located between the control box and the battery monomer, can support the battery monomer in the second direction, so that the control box and the battery monomer are not pressed and broken. The support member is spaced apart from the control box and the battery monomer, and can provide a containing space and a discharge path for the gas in the case of overheating of the battery monomer and the gas breaking through the explosion-proof valve, avoid the gas diffusing in the battery monomer, and reduce the risk of thermal runaway.

[0008] As an optional technical scheme of the application, the battery monomer comprises a top cover, the support member is arranged on the top cover, the top cover is provided with a pole, the pole extends from the top cover to the second direction, and the height of the pole is lower than the height of the support member in the second direction.

[0009] In the technical solution, the support member is arranged on the top cover, which can improve the connection strength between the support member and the top cover, prevent the support member and the top cover from being separated during the operation of the battery monomer, and ensure the continuity and integrity of the battery monomer structure. The pole extends in the second direction, which conforms to the stacking rule of the battery monomer itself, avoids the pressure of the electrolyte in the battery on the top cover and the pole, and prevents the electrolyte from overflowing through the connection between the pole and the top cover when the pressure in the battery increases. Meanwhile, the height of the support member is higher than that of the pole, which can prevent the battery monomer above the second direction from pressing the pole of the battery monomer below the second direction during the stacking of the battery monomer, and protect the pole from being damaged.

[0010] As an optional technical solution of the present application, in the second direction and away from the top cover, the area of the cross section of the support member cut by a plane perpendicular to the second direction gradually decreases.

[0011] In the technical solution, the structure with the gradually decreasing cross-sectional area has the characteristics of unequal upper and lower bases, and therefore the support member has better mechanical stability. During the stacking of the battery monomer, the support member with the gradually decreasing cross-sectional area can more effectively resist lateral forces and reduce the inclination or deviation caused by uneven pressure between the battery monomers or external forces, thereby enhancing the structural stability of the entire battery cluster. Further, the reduction of the cross-sectional area of the support member away from the top cover can reduce material consumption and manufacturing cost.

[0012] As an optional technical solution of the present application, in the first direction, the support member spans the two end plates on opposite ends of the accommodating cavity and is connected with the two end plates.

[0013] In the technical solution, the support member can form continuous support for the plurality of battery monomers arranged in the first direction between the two end plates, so that the battery monomers between the two end plates can be uniformly and stably supported, the structural stability of the entire battery cluster is enhanced, and the risk of deformation or damage of the battery monomers caused by uneven local stress is reduced. In addition, the support member also has the function of installation and positioning, which ensures that the battery monomers between the two end plates can maintain consistent alignment and spacing during installation, and improves the installation precision of the battery monomers.

[0014] As an optional technical solution of the present application, the support member includes a first sub-portion and a second sub-portion, the first sub-portion is attached to the battery monomer, and the second sub-portion is connected with the first sub-portion and protrudes relative to the first sub-portion in the second direction.

[0015] In the technical solution, the first sub-portion is attached to the battery monomer to conduct the heat generated by the battery monomer, so that the battery monomer can be cooled down. The second sub-portion protrudes in the second direction relative to the first sub-portion to support the battery monomer above the support, so that the support can better withstand the gravity of the battery monomer. The second sub-portion protrudes in the second direction relative to the first sub-portion, which can provide an additional gap between adjacent battery monomers. The gap can serve as a discharge channel for hot air and gas. When the internal pressure of the battery monomer abnormally rises, such as overheating or failure, the gap can provide a space for the gas released from the battery monomer, thereby reducing the direct impact of the gas on the battery monomer and reducing the risk of explosion or rupture of the battery monomer due to excessive internal pressure.

[0016] As an optional technical solution of the present application, the first sub-portion is provided with a through hole, and the top cover is further provided with a burst valve, and the through hole is opposite to the burst valve.

[0017] In the technical solution, when the battery monomer is overheated or fails, the gas in the battery monomer is quickly discharged through the through hole opposite to the burst valve after the burst valve breaks, which can prevent the battery monomer from exploding or rupturing due to excessive internal pressure, thereby reducing the impact of the failed battery monomer on the surrounding battery monomers and even the entire battery cluster.

[0018] As an optional technical solution of the present application, in the second direction and away from the top cover, the area of the cross section of the second sub-portion gradually decreases.

[0019] In the technical solution, the cross section with gradually decreasing area has the characteristics of unequal upper and lower bases, so that the second sub-portion has better mechanical stability. When the battery monomers are stacked, the second sub-portion with gradually decreasing cross section area can more effectively resist lateral force and reduce tilting or deviation caused by uneven pressure between battery monomers or external force, thereby enhancing the structural stability of the entire battery cluster. Further, the second sub-portion away from the top cover has a reduced cross section area, which can reduce material consumption and manufacturing cost.

[0020] As an optional technical solution of the present application, each support includes one first sub-portion and two second sub-portions, and in a third direction, the two second sub-portions are arranged at opposite ends of the first sub-portion, and the third direction is perpendicular to the first direction and the second direction.

[0021] In the technical scheme, the two second sub-parts are arranged at opposite ends of the first sub-part in the third direction, so that balanced supporting force can be provided in two directions to maintain the stability of the battery cells in the battery cluster. The two second sub-parts are also conducive to uniformly dispersing the weight and internal pressure of the battery cells, and reducing the risk of deformation or damage caused by uneven stress.

[0022] As an optional technical scheme of the present application, the battery cabinet comprises at least one accommodating cavity, and the cabinet comprises two opposite side walls, and the end plate is connected with the side wall.

[0023] In the technical scheme, the end plate is directly connected with the side wall, which on the one hand reduces the number of components in the battery cabinet, and on the other hand the side wall can provide a mounting position for the end plate and help the end plate to provide clamping force for the battery cluster to ensure correct positioning and safe fixation of the battery cluster in the accommodating cavity.

[0024] As an optional technical scheme of the present application, the battery cabinet further comprises longitudinal beams, the longitudinal beams are connected with the cabinet and divide the cabinet into at least two accommodating cavities in the first direction, and the end plates in the outermost accommodating cavities are respectively connected with the side walls of the cabinet and the longitudinal beams.

[0025] In the technical scheme, the longitudinal beams not only enhance the structural stability of the cabinet, but also provide additional mounting positions for the end plates, so that the fixation of the end plates is more stable, the mechanical strength and durability of the entire battery cabinet are enhanced, the pressure on the side walls is reduced, and the bending or deformation of the side walls is reduced.

[0026] As an optional technical scheme of the present application, the battery cabinet further comprises longitudinal beams, the longitudinal beams are connected with the cabinet and divide the cabinet into at least three accommodating cavities in the first direction, and the end plates in the outermost accommodating cavities are respectively connected with the side walls of the cabinet and the longitudinal beams, and the end plates in the middle accommodating cavities are respectively connected with two opposite longitudinal beams.

[0027] In the technical scheme, the longitudinal beams not only enhance the structural stability of the cabinet, but also provide additional mounting positions for the end plates, so that the fixation of the end plates is more stable, the mechanical strength and durability of the entire battery cabinet are enhanced, the pressure on the side walls is reduced, and the bending or deformation of the side walls is reduced. The two longitudinal beams in the first direction can provide more balanced support for the end plates on both sides, so that the battery cabinet can more evenly disperse the acting force when subjected to the acting force such as vibration or impact, reduce local stress concentration, and thus reduce the risk of structural deformation.

[0028] As an optional technical solution of the application, the battery cluster further comprises a cooling plate, the cooling plate is connected with the box body, and the cooling plate has a first side and a second side opposite in the first direction, at least one battery monomer is arranged on the first side, and at least another battery monomer is arranged on the second side.

[0029] In the above technical solution, the battery monomers and the cooling plates are alternately arranged in the first direction or the second direction, so that the cooling plates and the battery monomers can be fully contacted, and the battery monomers can be cooled by the refrigerant in the heat dissipation channel formed by the cooling unit and the cooling plate. In each battery monomer, at least two battery monomers are arranged in the first direction and / or the second direction, so that the battery cluster can be arranged more flexibly and has higher adaptability to the battery cabinet.

[0030] As an optional technical solution of the application, the box body is provided with a bottom plate, the cooling plate comprises a first sub-plate and a second sub-plate, the first sub-plate is connected with the bottom plate, the second sub-plate is connected with the first sub-plate at an angle, and the second sub-plate has the first side and the second side, the first sub-plate has a first part located on the first side and a second part located on the second side, and the battery monomers arranged on the first side are arranged on the first part, and the battery monomers arranged on the second side are arranged on the second part.

[0031] In the above technical solution, on the one hand, the first sub-plate and the second sub-plate can cool the battery monomers; on the other hand, the first sub-plate can support the battery monomers, so that the battery monomers are not arranged in suspension, so as to improve the stability of the battery monomers on the cooling plate, thereby facilitating the improvement of the safety of the battery monomers during transportation and vibration, and at the same time, the battery monomers can avoid being directly in contact with the box body, so that the temperature outside the box body can be reduced or avoided from being conducted to the battery monomers through the box body in reverse, thereby facilitating the improvement of the liquid cooling effect.

[0032] As an optional technical solution of the application, the bottom plate is provided with a first connecting hole, the first sub-plate is provided with a second connecting hole, and an assembly part passes through the first connecting hole and is locked in the second connecting hole to connect the first sub-plate and the bottom plate.

[0033] In the above technical solution, the assembly part can fix the electric cooling plate, improve the connection strength between the battery cluster and the box body, and the assembly part has a simple installation mode, so that the energy storage device can be easily assembled and formed, and the safety of the energy storage device during transportation and vibration can be improved.

[0034] In a second aspect, the application provides a power utilization device. The power utilization device comprises the energy storage device according to any one of the above embodiments.

[0035] In the aforementioned technical solution, the energy storage device of the electrical equipment directly assembles battery cells into battery clusters, achieving modularization of the energy storage device. This eliminates the intermediate module and battery pack integration processes, improving the integration level of the energy storage device. It also saves on structural components required for modularization, such as module frames, battery pack shells, battery frames, limiting components, and wiring harnesses, significantly reducing the number of structural components. This improves the utilization rate of installation space within the energy storage device, increases the number of battery cells, thereby increasing the energy density of the energy storage device, storing more electricity, and achieving longer range. It also reduces assembly steps, which is beneficial for increasing the production speed of the energy storage device. Furthermore, the battery clusters are supported by the battery cabinet, with the end plates abutting against the sides of the battery clusters. This provides clamping force in the first direction, which can withstand the weight of the battery cells in the second direction, preventing the weight-bearing of the battery cells and thus firmly fixing the battery clusters within the battery cabinet. Support members are located between two adjacent battery cells in the second direction, supporting the battery cells in that direction and preventing them from being crushed. The support members spaced adjacent battery cells, which can provide a containment space and a discharge path for the gas in the event of overheating inside the battery cell and the internal gas breaking through the explosion-proof valve, thus preventing the gas from spreading inside the battery cell and reducing the risk of thermal runaway.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This is a three-dimensional assembly diagram of an energy storage device according to some embodiments of this application;

[0039] Figure 2 for Figure 1 The diagram shown is an exploded three-dimensional view of the energy storage device after the cover has been removed.

[0040] Figure 3 for Figure 1 A three-dimensional structural schematic diagram of a portion of the structure in one embodiment of the energy storage device is shown.

[0041] Figure 4 for Figure 3A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1.

[0042] Figure 5 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1. Figure 1 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1.

[0043] Figure 6 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1. Figure 4 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1.

[0044] Figure 7 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1. Figure 4 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1.

[0045] Figure 8 A perspective view of a partial structure of an embodiment of the energy storage device is shown in FIG. 1.

[0046] The reference signs in the detailed description of the embodiments are as follows:

[0047] Electric appliance 10000, energy storage device 1000, conversion device 4000, user load 2000, user load 3000, conversion device 4000, battery cabinet 100, box body 10, cover body 20, end plate 30, longitudinal beam 40, bottom plate 50, gap 60, battery cluster 70, battery monomer 71, top cover 711, pole 7111, explosion-proof valve 7113, cooling plate 73, first sub-plate 731, first part 7311, second part 7312, second sub-plate 732, first side 7321, second side 7322, through hole 733, heat-conducting pad 75, control box 77, support 80, first sub-portion 81, second sub-portion 83, through hole 85, assembly 90. Detailed description of the embodiments

[0048] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0049] Unless otherwise defined, 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 terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0051] Reference herein to "embodiments" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, support and top cover together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "liquid level", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements.

[0056] Please refer to Figure 1 , Figure 2、 Figure 3 and Figure 5 The energy storage device 1000 provided by the present application includes a battery cabinet 100, an end plate 30, a battery cluster 70, and a support 80. The battery cabinet 100 includes a box 10 provided with a receiving cavity. The end plate 30 is installed on the battery cabinet 100 and located at opposite ends of the receiving cavity in a first direction. At least one battery cluster 70 is contained in each receiving cavity. The end plate 30 is in contact with the side surface of the battery cluster 70. The battery cluster 70 includes at least two battery monomers 71 arranged in a second direction. The first direction is perpendicular to the second direction. In the second direction, the support 80 is arranged on the side of the battery monomer 71 away from the bottom surface of the battery cluster 70.

[0057] Specifically, the battery cabinet 100 includes a box 10 and a cover 20. The cross section (the plane cut by the XZ plane) of the battery cabinet 100 can be, but is not limited to, circular, elliptical, square, or other polygonal. The material of the battery cabinet 100 includes, but is not limited to, metal or non-metal. The metal includes aluminum, iron, steel, aluminum alloy, or iron alloy, etc., and the non-metal includes, but is not limited to, plastic, etc. In the present application, the cross section of the battery cabinet 100 is square, which facilitates the integration of the energy storage device 1000. One of the embodiments of the energy storage device 1000. In the present application, the material of the battery cabinet 100 is aluminum alloy, which can make the energy storage device 1000 lighter and more convenient to transport while ensuring rigidity.

[0058] In the present application, the length, width, and height of the battery cabinet 100 are used to establish a rectangular coordinate system with three axes. The first direction X is the length direction of the battery cabinet 100, the second direction Z is the height direction of the battery cabinet 100, and the third direction Y is the width direction of the battery cabinet 100.

[0059] The box 10 and the cover 20 are combined to form the battery cabinet 100, and the battery cluster 70 is contained in the battery cabinet 100 of the box 10. The box 10 is a component in the battery cabinet 100 that loads and supports the battery cluster 70. One end of the box 10 is closed, and the other end is provided with an opening. The opening is used for loading the battery cluster 70 into the box 10. The cover 20 is a component in the battery cabinet 100 that covers the opening. The connection between the box 10 and the cover 20 can be detachable or non-detachable. The detachable connection includes, but is not limited to, screw connection, snap connection, or a combination of screw connection and snap connection. The non-detachable connection includes, but is not limited to, glue connection, welding, or a combination of glue connection and welding. In the present application, the box 10 and the cover 20 are detachably connected. In the present application, the cover 20 is a cabinet door that can be opened and closed.

[0060] In addition, in the case that the battery cabinet 100 comprises the box body 10 and the cover body 20, the battery cabinet 100 can be made of one kind of material, for example, the box body 10 and the cover body 20 are made of the same material, i.e. aluminum alloy. The battery cabinet 100 can also be made of different materials for different parts. For example, the box body 10 is made of metal material, and the cover body 20 is made of plastic. Of course, the material of the box body 10 and the material of the cover body 20 can also be other combinations of different materials, which are not listed here.

[0061] The box body 10 is a component of the battery cabinet 100 for loading and supporting the battery cluster 70. In the box body 10, there is one or more accommodation cavities, which can be flexibly determined according to the number of battery clusters 70 and other conditions. Each accommodation cavity contains at least one battery cluster 70, and the number of battery clusters 70 can also be flexibly determined according to actual requirements. In this application, the battery cabinet 100 is divided into seven accommodation cavities, and each accommodation cavity contains one battery cluster 70. The battery cluster 70 is arranged along the first direction X and carried in the battery cabinet 100. The end plate 30 is arranged in the battery cabinet 100 and abuts against the side surface of the battery cluster 70. The connection between the partition plate and the box body 10 can be detachable or non-detachable. The detachable connection includes but is not limited to screw connection, clamping connection, or a combination of screw connection and clamping connection. The non-detachable connection includes but is not limited to glue connection, welding, or a combination of glue connection and welding. In this application, the partition plate is detachably connected to the box body 10.

[0062] The end plate 30 is arranged in the battery cabinet 100, which can provide a clamping force in the horizontal direction (the first direction X) for the battery cluster 70 to bear the gravity in the vertical direction (the second direction Z) between the battery monomers 71, so as to avoid the battery monomers 71 being pressed by the gravity. Compared with the conventional battery module (including a shell and battery monomers 71 arranged in the shell) which is fixedly installed in the battery cabinet 100 by a support structure (including a horizontal bearing beam and a vertical bearing beam), the application cancels the support structure and increases the installation space in the battery cabinet 100 for installing the battery cluster 70.

[0063] The battery cell 71 is the smallest unit for storing and releasing electric energy. The plurality of battery cells 71 can be connected in series, in parallel, or in a mixed connection, which means that the plurality of battery cells 71 are connected in series and in parallel. The plurality of battery cells 71 can be directly connected in series, in parallel, or in a mixed connection. In the present application, each battery cluster 70 includes at least two battery cells 71. That is, the at least two battery cells 71 form a battery cell 71, and the at least two battery cells 71 form a battery cluster 70. The battery cell 71 and the battery cluster 70 can both achieve energy storage and release. The battery cell 71 is in a stacked relationship with the battery cell 71. The battery cell 71 can be arranged and combined with other battery cells 71 in any or any combination of the first direction X, the second direction Z, and the third direction Y, which is not limited in the present application. Further, each battery cluster 70 is also provided with a control box 77. The support 80 is provided between the control box 77 and the battery cell 71, and the support 80 is used to space and support the control box 77 and the battery cell 71.

[0064] The support 80 is provided between the battery cell 71 and the battery cell 71, and is used to support the battery cell 71. The support 80 is provided between the control box 77 and the battery cell 71, and is used to support the battery cell 71 and the control box 77. The support 80 can be one or more, and two embodiments of the support 80 will be introduced below. It can be understood that the end plate 30 is the main force bearing structure of the energy storage device 1000, and can bear the gravity between the battery cells 71 in the longitudinal direction (second direction Z) through the clamping force in the transverse direction (first direction X). The support 80 is also the main force bearing structure of the energy storage device 1000, which can provide support force for the battery cell 71 in the second direction Z, so as to avoid the battery cell 71 located above in the second direction Z from pressing the battery cell 71 located below, thereby realizing the direct stacking of the battery cell 71. By stacking the battery cell 71 and the battery cell 71, the concept of the battery module in the traditional scheme is cancelled, and the shell and the sealing element for packaging the battery cell 71 are saved, so that the battery cell 71 and the bottom of the battery cabinet 100 can be directly stressed between the battery cell 71 and the battery cell 71, avoiding the traditional scheme (including the shell and the battery cell 71 arranged in the shell) being fixedly installed in the battery cabinet 100 through the support structure (including the transverse bearing beam and the longitudinal bearing beam), thereby saving space in the first direction X, the second direction Z and the third direction Y. On the one hand, it saves cost, and on the other hand, it also improves the space utilization of the battery cabinet 100, that is, more battery cells 71 can be accommodated. The support 80 provided between the battery cell 71 and the control box 77 can also provide support force for the control box 77 in the second direction Z, so as to avoid the control box 77 located above in the second direction Z from pressing the battery cell 71 located below.

[0065] Further, the support 80 is arranged between two adjacent battery cells 71 in the second direction Z, i.e., a gap 60 is arranged between two adjacent battery cells 71 in the second direction Z, so as to provide a safe accommodation and discharge path for the gas in the case of overheating of the battery cell 71 and the internal gas breaking through the explosion-proof valve 7113, thereby avoiding the diffusion of the gas in the battery cell 71 and reducing the risk of thermal runaway.

[0066] In the above technical solution, the energy storage device 1000 directly forms the battery cluster 70 by using the battery cells 71, and the integration process of the middle process module and the battery pack is omitted, so as to improve the integration of the energy storage device 1000, save the structure of the module frame, the battery pack shell, the battery frame, the limiting assembly, the wire harness device and the like, greatly reduce the number of structure, thereby improving the utilization rate of the installation space in the energy storage device 1000, increasing the number of battery cells 71, thereby improving the energy density of the energy storage device 1000, storing more electric quantity, having higher endurance, reducing the assembly process, and being beneficial to improving the production speed of the energy storage device 1000. In addition, the battery cluster 70 is carried on the battery cabinet 100, and the end plate 30 abuts against the side surface of the battery cluster 70, which can provide a clamping force in the first direction X for the battery cluster 70, the clamping force can bear the gravity of the battery cells 71 in the second direction Z, so as to avoid the compression between the battery cells 71, thereby firmly fixing the battery cluster 70 in the battery cabinet 100. The support 80 is arranged between two adjacent battery cells 71 in the second direction Z, which can support the battery cells 71 in the second direction Z, thereby avoiding the compression between the battery cells 71. The support 80 is arranged between two adjacent battery cells 71, which can provide an accommodation space and a discharge path for the gas in the case of overheating of the battery cell 71 and the internal gas breaking through the explosion-proof valve 7113, thereby avoiding the diffusion of the gas in the battery cell 71 and reducing the risk of thermal runaway.

[0067] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , as an optional technical solution of the present application, the battery cell 71 comprises a top cover 711, the top cover 711 is provided with a pole 7111, the pole 7111 extends from the top cover 711 towards the second direction Z, and in the second direction Z, the height of the pole 7111 is lower than the height of the support 80.

[0068] Specifically, in one stacking manner of the battery monomer 71, the pole post 7111 extends towards the second direction Z, i.e. the pole post 7111 extends towards a direction perpendicular to the horizontal plane, which conforms to the stacking rule of the battery monomer 71 itself, avoids the electrolyte inside the battery from exerting pressure on the top cover 711 and the pole post 7111, and avoids the electrolyte from overflowing through the joint between the pole post 7111 and the top cover 711 when the pressure inside the battery increases. Meanwhile, the height of the support 80 is higher than that of the pole post 7111, which ensures that the battery monomer 71 located above does not press the pole post 7111 of the battery monomer 71 located below when the battery monomers 71 are stacked, thereby avoiding possible damage and electrical connection problems. Among them, the height of the pole post 7111 is lower than the height of the support 80, which can avoid the battery monomer 71 located above from pressing the pole post 7111 of the battery monomer 71 located below in the second direction Z when the battery monomers 71 are stacked, protects the pole post 7111 from damage, and ensures the electrical connection and structural integrity of the battery monomer 71. In the case of overheating inside the battery monomer 71 and the internal gas breaking through the explosion-proof valve 7113, the support 80 can also provide a safe accommodation and discharge path for the gas, reduce the impact of the gas on the pole post 7111, avoid the battery short circuit or thermal runaway caused by the damage of the pole post 7111, and ensure the safety and reliability of the battery monomer 71.

[0069] Further, in the present application, the support 80 has two embodiments, which will be described below. It can be understood that in other embodiments of the present application, the support 80 can be other embodiments.

[0070] Please refer to Figures 2 to 4 In the first embodiment, the support 80 is arranged on the top cover 711. Specifically, in this embodiment, at least one support 80 is arranged on each battery monomer 71. The present application takes one battery monomer 71 with one support 80 as an example for illustration. The support 80 is arranged on the top cover 711. In some embodiments, the support 80 and the top cover 711 are an integral structure, i.e. the support 80 and the top cover 711 are an integral structure, which can improve the bonding strength between the support 80 and the top cover 711, prevent the support 80 and the top cover 711 from being separated during the operation of the battery monomer 71, and thus ensure the stability and reliability of the operation of the battery monomer 71. In other embodiments, the support 80 and the top cover 711 are separate structures, i.e. the support 80 and the top cover 711 are two different structures. In one example, the support 80 and the top cover 711 can be combined together by a detachable connection mode, which includes but is not limited to snap connection or threaded connection, etc. In another example, the support 80 and the top cover 711 can be combined together by a non-detachable connection mode, which includes but is not limited to bonding or welding, etc.

[0071] Further, in the present application, the support 80 and the top cover 711 are integrally formed, and the top cover 711 is punched, thereby improving the connection strength of the support 80 and the top cover 711, and ensuring the continuity and integrity of the battery monomer 71 structure. The support 80 is arranged on the top cover 711, which can provide stable vertical support force when the battery monomers 71 are stacked, ensure that the battery monomers 71 maintain appropriate spacing, and avoid damage to the pole 7111 or deformation of the battery monomer 71 due to pressure. The support 80 is arranged on the top cover 711, which can prevent the support 80 and the top cover 711 from separating during the operation of the battery monomer 71, thereby ensuring the stability and reliability of the operation of the battery monomer 71, reducing the assembly steps, and helping to improve production efficiency and reduce costs.

[0072] Please refer to Figures 2 to 4 , as an optional technical solution of the present application, in the second direction Z and away from the direction of the top cover 711, the area of the cross section of the support 80 cut by the plane perpendicular to the second direction Z gradually decreases.

[0073] Specifically, the area of the cross section of the support 80 cut by the plane perpendicular to the second direction Z gradually decreases, forming a structure that is smaller at the top and larger at the bottom in the second direction Z. In an embodiment, the cross section of the support 80 cut by the YZ plane is a trapezoid. The trapezoidal structure has the characteristics of unequal upper and lower bases, and has better mechanical stability. When the battery monomers 71 are stacked, the trapezoidal support 80 can more effectively resist lateral forces, reduce tilting or deviation caused by uneven pressure between the battery monomers 71 or external forces, thereby enhancing the structural stability of the entire battery cluster 70. The lateral force is a force that is not parallel to the second direction Z. In addition, the cross-sectional area of the trapezoidal support 80 gradually decreases in the second direction Z and away from the direction of the top cover 711, so the support 80 has a larger contact area in the area of the top cover 711 of the battery monomer 71, and a smaller contact area in the area away from the top cover 711. It can disperse the force acting on the top cover 711, help to reduce the pressure on the top cover 711 while maintaining sufficient support force, and avoid unnecessary stress concentration on the battery monomer 71.

[0074] The trapezoidal support 80 can reduce material consumption and reduce manufacturing costs while maintaining the strength and stability of the structure while achieving the support function. In addition, the smaller cross-sectional area region can serve as a channel for the upward movement of hot air, helping to escape heat from the battery monomer 71 and reducing heat accumulation.

[0075] Please refer to Figure 2 , Figures 5 to 7 In the second embodiment, in the first direction X, the support 80 spans the two end plates 30 on opposite ends of the accommodation cavity and is connected with the two end plates 30.

[0076] Specifically, the battery cluster 70 of the present application is arranged with battery monomers 71 in the first direction X, the second direction Z and the third direction Y. Therefore, in the second embodiment, for a single battery cluster 70, there are multiple layers of battery monomers 71 in the second direction Z, each layer of battery monomers 71 has multiple rows in the third direction Y, and each row of battery monomers 71 is arranged in sequence in the first direction X. In the second embodiment, one support 80 is arranged for each row, the support 80 extends in the first direction X and abuts against two end plates 30 opposite in the first direction X, thereby forming continuous support in the second direction Z for the multiple battery monomers 71 arranged in sequence in the first direction X, so that each row of battery monomers 71 can be uniformly and stably supported. Since the support 80 directly abuts against the two end plates 30, it provides continuous support force for the battery monomers 71 and enhances the structural stability of the entire battery cluster 70. The support 80 extends in the first direction X and covers the entire row of battery monomers 71. This layout can effectively disperse the pressure between the battery monomers 71 and reduce the risk of deformation or damage of the battery monomers 71 due to uneven local stress. In addition, the support 80 also has the function of installation and positioning, which ensures that each row of battery monomers 71 can maintain consistent alignment and spacing during installation, thereby improving the installation accuracy of the battery monomers 71.

[0077] Please refer to Figure 2 , Figures 5 to 7 As an optional technical solution of the present application, the support 80 includes a first sub-portion 81 and a second sub-portion 83. The first sub-portion 81 is attached to the battery monomer 71, and the second sub-portion 83 is connected to the first sub-portion 81 and protrudes in the second direction Z relative to the first sub-portion 81.

[0078] Specifically, in some embodiments, the first sub-portion 81 and the second sub-portion 83 are an integral structure, i.e., the first sub-portion 81 and the second sub-portion 83 are an integral structure, thereby improving the bonding strength between the first sub-portion 81 and the second sub-portion 83, preventing the first sub-portion 81 and the second sub-portion 83 from separating during the operation of the battery monomer 71, and thereby ensuring the stability and reliability of the operation of the battery monomer 71. In other embodiments, the first sub-portion 81 and the second sub-portion 83 are separate structures, i.e., the first sub-portion 81 and the second sub-portion 83 are two different structures. In one example, the first sub-portion 81 and the second sub-portion 83 can be combined together by a detachable connection mode, which includes but is not limited to a buckle connection or a threaded connection, etc. In another example, the first sub-portion 81 and the second sub-portion 83 can be combined together by a non-detachable connection mode, which includes but is not limited to adhesion or welding, etc.

[0079] The first sub-portion 81 adheres to the battery monomer 71 and can conduct the heat of the battery monomer 71, that is, the heat generated by the battery monomer 71 can be transmitted to the support 80, thereby helping the battery monomer 71 dissipate heat. The second sub-portion 83 protrudes in the second direction Z relative to the first sub-portion 81 to support the battery monomer 71 located above the support 80, so that the support 80 can better withstand the gravity from the battery monomer 71. The second sub-portion 83 protrudes in the second direction Z relative to the first sub-portion 81, and can also provide an additional gap 60 between adjacent battery monomers 71. The gap 60 can serve as a discharge channel for hot air and gas. When the internal pressure of the battery monomer 71 abnormally rises, such as overheating or failure, the gap 60 can provide accommodation space for the gas released inside the battery monomer 71, thereby reducing the direct impact of the gas on the battery monomer 71 and reducing the risk of explosion or rupture of the battery monomer 71 due to excessive internal pressure.

[0080] Please refer to Figure 2 , Figures 5 to 7 As an optional technical solution of the present application, the first sub-portion 81 is provided with a through hole 85, and the top cover 711 is also provided with a explosion-proof valve 7113, and the through hole 85 is opposite to the explosion-proof valve 7113.

[0081] Specifically, the through hole 85 is used to communicate the gap 60 between the explosion-proof valve 7113 and the adjacent battery monomer 71. The through hole 85 can be one or more, and in the present application, the number of through holes 85 corresponds to the number of explosion-proof valves 7113. The through hole 85 can be, but is not limited to, circular, oval, triangular, quadrilateral or other polygonal shapes. When the battery monomer 71 is overheated or fails, the explosion-proof valve 7113 breaks, the through hole 85 of the first sub-portion 81 is opposite to the explosion-proof valve 7113 on the top cover 711, and the accumulated gas is quickly discharged through the through hole 85 directly opposite to the explosion-proof valve 7113, which can prevent the battery monomer 71 from exploding or rupturing due to excessive internal pressure, thereby reducing the influence of the failed battery monomer 71 on the surrounding battery monomers 71 and even the entire battery cluster 70.

[0082] Please refer to Figure 2 , Figures 5 to 7 As an optional technical solution of the present application, in the second direction Z and away from the top cover 711, the cross-sectional area of the second sub-portion 83 cut by a plane perpendicular to the second direction Z gradually decreases.

[0083] Specifically, in one embodiment, the second sub-portion 83 has a trapezoidal cross-section when viewed in the YZ plane. The trapezoidal structure has the characteristic of having unequal upper and lower bases, which has better mechanical stability. When the battery cells 71 are stacked, the trapezoidal second sub-portion 83 can more effectively resist lateral forces, reducing tilting or deviation caused by uneven pressure between the battery cells 71 or external forces, thereby enhancing the structural stability of the entire battery cluster 70. The lateral force is a force that is not parallel to the second direction Z. In addition, the cross-sectional area of the trapezoidal second sub-portion 83 gradually decreases in the second direction Z and away from the top cover 711, so the second sub-portion 83 has a larger contact area in the area of the top cover 711 of the battery cell 71, and reduces the contact area in the area away from the top cover 711, which can disperse the force of the top cover 711, help to reduce the pressure on the top cover 711 while maintaining sufficient supporting force, and avoid unnecessary stress concentration on the battery cell 71.

[0084] Referring to Figure 2 , Figure 3 , as an optional technical solution of the present application, each support 80 includes a first sub-portion 81 and two second sub-portions 83, which are arranged at opposite ends of the first sub-portion 81 in the third direction Y, which is perpendicular to the first direction X and the second direction Z.

[0085] Specifically, the two second sub-portions 83 are distributed at opposite ends of the first sub-portion 81 in the third direction Y, which can provide balanced support force in two directions, thereby maintaining the stability of the battery cells 71 in the battery cluster 70. The two second sub-portions 83 also help to evenly distribute the weight and internal pressure of the battery cells 71, reducing the risk of deformation or damage caused by uneven stress, especially when the battery cells 71 expand due to heat during charging and discharging. Balanced support can prevent mutual extrusion or misalignment between the battery cells 71, thereby protecting the battery cells 71 from mechanical damage. The symmetry of the two second sub-portions 83 not only provides a balanced and harmonious structure visually, but also achieves balanced distribution of force mechanically. This symmetry helps to reduce the torsional and bending stress of the entire battery cluster 70 when subjected to external impact or vibration, because the two opposite support points can cancel out the acting force, reducing the deviation or misalignment of the arrangement of the battery cells 71.

[0086] Referring to Figure 5 , Figure 2 and Figure 3 , as an optional technical solution of the present application, the accommodating cavity is at least one, and the box body 10 includes two opposite side walls, and the end plate 30 is connected with the side walls.

[0087] Specifically, in one embodiment, the battery cabinet 100 of the present application comprises a receiving cavity, and the receiving cavity is provided with a battery cluster 70. The battery cluster 70 is provided with end plates 30 on both sides in the first direction X, and the end plates 30 on both sides are connected with the side walls. The end plates 30 are directly connected with the side walls, which on the one hand reduces the number of components of the battery cabinet 100, and on the other hand the side walls can provide mounting positions for the end plates 30 and help the end plates 30 to provide clamping force for the battery cluster 70, so as to ensure correct positioning and safe fixation of the battery cluster 70 in the receiving cavity.

[0088] Please refer to Figure 5 , Figure 2 and Figure 3 , as an optional technical solution of the present application, the battery cabinet 100 further comprises longitudinal beams 40, the longitudinal beams 40 are connected with the box body 10 and divide the box body 10 into at least two receiving cavities in the first direction X, and the end plates 30 in the receiving cavities located at the outermost sides are respectively connected with the side walls of the box body 10 and the longitudinal beams 40.

[0089] Specifically, in another embodiment, the battery cabinet 100 comprises at least two receiving cavities, and the receiving cavities are arranged in sequence in the first direction X (for example, seven receiving cavities in the present application). Further, the battery cabinet 100 is further provided with a receiving cavity for accommodating a liquid cooling unit, and the liquid cooling unit is used to be connected with the cooling plate 73 to form a refrigerant circulation channel. The receiving cavity and the receiving cavities are arranged in sequence in the first direction X, and in the present application, the receiving cavity is located on one side of any receiving cavity located at the outermost side.

[0090] The longitudinal beams 40 are used to support the box body 10 and connect the end plates 30. The longitudinal beams 40 are connected with the box body 10 at least at opposite ends in the second direction Z, thereby providing support for the box body 10 in the second direction Z. The longitudinal beams 40 divide the box body 10 into at least two receiving cavities in the first direction X. It can be understood that the longitudinal beams 40 are one or more, and in the present application, the longitudinal beams 40 are multiple. It can be understood that in the first direction X, the end plates 30 in the receiving cavities located at the outermost sides are respectively connected with the side walls of the box body 10 and the longitudinal beams 40. The longitudinal beams 40 not only enhance the structural stability of the box body 10, but also provide additional mounting positions for the end plates 30, so that the fixation of the end plates 30 is more stable, the mechanical strength and durability of the entire battery cabinet 100 are enhanced, the pressure on the side walls is reduced, and the bending or deformation of the side walls is reduced.

[0091] Please refer to Figure 5 , Figure 2 and Figure 3 , as an optional technical solution of the present application, the longitudinal beams 40 are connected with the box body 10 and divide the box body 10 into at least three receiving cavities in the first direction X, and the end plates 30 in the receiving cavities located at the outermost sides are respectively connected with the side walls of the box body 10 and the longitudinal beams 40, and the end plates 30 in the receiving cavities located in the middle are respectively connected with two opposite longitudinal beams 40.

[0092] Specifically, in another embodiment, the battery cabinet 100 comprises at least three accommodation cavities, and one battery cluster 70 is arranged in each accommodation cavity (for example, seven accommodation cavities in the present application). The connection mode of the end plate 30 in the outermost accommodation cavity is consistent with the above, and will not be repeated. It can be understood that the battery cluster 70 in the outermost accommodation cavity is flanked by longitudinal beams 40 in the first direction X, and therefore the end plate 30 in the middle accommodation cavity is connected with two opposite longitudinal beams 40, which helps to isolate the battery clusters 70 in different accommodation cavities and reduce thermal management and electrical interference. The connection of the end plate 30 in the middle accommodation cavity with the longitudinal beam 40 can provide stronger support and fixation, and also allows more uniform heat distribution and stress transmission. The two side longitudinal beams 40 in the first direction X can provide more balanced support for the two side end plates 30, so that the battery cabinet 100 can more evenly disperse the acting force, such as vibration or impact, when subjected to the acting force, and reduce the risk of local stress concentration and structural deformation.

[0093] Please refer to Figure 4 , Figure 5 , Figure 6 , Figure 2 and Figure 3 , as an optional technical solution of the present application, the battery cluster 70 further comprises a cooling plate 73, the cooling plate 73 is connected with the box body 10, and the cooling plate 73 has opposite first and second side faces 7321 in the first direction X, at least one battery monomer 71 is arranged on the first side face 7321, and at least another battery monomer 71 is arranged on the second side face 7321.

[0094] Specifically, the cooling plate 73 is arranged between two adjacent battery monomers 71. The battery monomers 71 and the cooling plates 73 are arranged alternately along the first direction X or the second direction Z, which ensures effective contact between the cooling plate 73 and the battery monomer 71. The energy storage device 1000 has improved cooling efficiency, which helps to maintain the appropriate working temperature of the battery monomer 71, prolong the service life and improve the performance. The first direction X and the second direction Z are arranged vertically, which can maximize the use of space and improve the overall compactness of the energy storage device 1000. This vertical arrangement can make the arrangement of the battery monomer 71 and the cooling plate 73 more flexible, which helps to optimize the design of the energy storage device 1000 and improve the overall performance and reliability of the energy storage device 1000. In the above technical solution, the battery monomer 71 and the cooling plate 73 are arranged alternately along the first direction X or the second direction Z, which can make the cooling plate 73 and the battery monomer 71 fully contact, and the cooling unit can be in communication with the cooling channel formed by the cooling plate 73 to cool the battery monomer 71. In each battery monomer 71, at least two battery monomers 71 are arranged along the first direction X and / or the second direction Z, which can make the arrangement of the battery cluster 70 more flexible and more adaptable to the battery cabinet 100.

[0095] Please refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 2 and Figure 3 , as an optional technical solution of the present application, the box body 10 is provided with a bottom plate 50, the cooling plate 73 includes a first sub-plate 731 and a second sub-plate 732, the first sub-plate 731 is connected with the bottom plate 50, the second sub-plate 732 is connected with the first sub-plate 731 at an angle, and the second sub-plate 732 has a first side 7321 and a second side 7321, the first sub-plate 731 has a first part 7311 located at the first side 7321 and a second part 7312 located at the second side 7321, the battery monomer 71 arranged on the first side 7321 is supported on the first part 7311, and the battery monomer 71 arranged on the second side 7321 is supported on the second part 7312.

[0096] Specifically, the connection between the first sub-plate 731 and the second sub-plate 732 can be detachable or non-detachable. The detachable connection includes, but is not limited to, screw connection, snap connection, or a combination of screw connection and snap connection. The non-detachable connection includes, but is not limited to, glue connection, welding, or a combination of glue connection and welding. The first sub-plate 731 is connected with the bottom plate 50 to fix the cooling plate 73. The second sub-plate 732 is connected with the first sub-plate 731 at an angle, that is, the second sub-plate 732 is not parallel to the first sub-plate 731. In this application, the first sub-plate 731 is parallel to the bottom plate 50, and the second sub-plate 732 is connected with the first sub-plate 731 at an angle of 90 degrees to fix the battery monomer 71 on the first side 7321 or the second side 7321 of the second sub-plate 732 and support the battery monomer 71 on the first sub-plate 731. On the one hand, the first sub-plate 731 and the second sub-plate 732 can cool the battery monomer 71; on the other hand, the first sub-plate 731 can support the battery monomer 71 to avoid the battery monomer 71 being suspended to improve the stability of the battery monomer 71 on the cooling plate 73, thereby facilitating to improve the safety of the battery monomer 71 during transportation and vibration, while avoiding the battery monomer 71 directly contacting the box 10, thereby reducing or avoiding the temperature outside the box 10 being conducted to the battery monomer 71 through the box 10, and thereby facilitating to improve the liquid cooling effect.

[0097] In the embodiment in which the support 80 includes the first sub-portion 81 and the second sub-portion 83, the second sub-plate 732 is further provided with a through hole 733 for the support 80 to pass through. The cooling plate 73 and the battery cluster 70 can be further provided with a heat-conducting pad 75 to improve the heat exchange efficiency.

[0098] Please refer to Figure 4 , Figure 5 , Figure 6 , Figure 2 and Figure 3 , as an optional technical solution of the present application, the bottom plate 50 is provided with a first connecting hole, the first sub-plate 731 is provided with a second connecting hole, and the assembling part 90 passes through the first connecting hole and is locked in the second connecting hole to connect the first sub-plate 731 and the bottom plate 50.

[0099] Specifically, the through hole 85 is used for the assembly piece 90 to pass through, so as to connect the first sub-plate 731 and the bottom plate 50. Further, the first sub-plate 731 and the bottom plate 50 are screwed in the application. The assembly piece 90 includes but is not limited to bolts and screws. The assembly piece 90 can fix the electric cooling plate 73, improve the connection strength of the battery cluster 70 and the box body 10, and the installation mode of the assembly piece 90 is relatively simple, which is convenient for the assembly of the energy storage device 1000, and is conducive to improving the safety of the energy storage device 1000 during transportation and vibration. Further, in other embodiments of the application, a hoisting cylindrical hole can be arranged to pass through the first connecting hole and be locked in the second connecting hole, so as to connect the first sub-plate 731 and the bottom plate 50, thereby facilitating hoisting of the energy storage device 1000. In some embodiments of the application, the first connecting hole and the second connecting hole can also be provided with elements having other functions, and are not limited to the assembly piece 90.

[0100] Please refer to Figure 4 、 Figure 5 、 Figure 8 、 ​ and ​ , in the second aspect, the application provides a kind of electric equipment 10000. Electric equipment 10000 includes the energy storage device 1000 of any one of the above embodiments.

[0101] Specifically, further, the application also provides electric equipment 10000 using the energy storage device 1000 as power supply. Electric equipment 10000 can include but is not limited to electric tools, mobile phones, ships, spacecraft or household energy storage systems and the like. Among them, spacecraft can include drones, rockets, space shuttles and the like. The application only takes electric equipment 10000 as an example to illustrate the household energy storage system. Household energy storage system includes energy storage device 1000 (for example, battery cabinet 100), conversion device 4000 (photovoltaic panel), a kind of user load 2000 (street lamp), another user load 3000 (household appliance) and conversion device 4000. Energy storage device 1000 can be installed on the outdoor wall by wall hanging mode. Specifically, the conversion device 4000 can be a photoelectric conversion device, and is installed on the roof, for converting light energy into electrical energy. Energy storage device 1000 is used to store the electrical energy and supply street lamp, household appliance for use at peak electricity price, or power supply when power grid is disconnected / power off, or power supply to power grid after grid connection. It should be noted that the energy storage device 1000 of the application is not limited to household energy storage scenarios.

[0102] The energy storage device 1000 of the electrical equipment 10000 directly forms the battery cluster 70 by the battery monomer 71, saves the integration process of the middle process module and the battery pack, improves the integration of the energy storage device 1000, saves the structure of the module frame, the battery pack shell, the battery frame, the limiting component, the wire harness device and the like, greatly reduces the number of structure, thereby improving the utilization rate of the installation space in the energy storage device 1000, increasing the number of the battery monomer 71, thereby improving the energy density of the energy storage device 1000, storing more electric quantity, having higher endurance, reducing the assembly process, and being conducive to improving the production speed of the energy storage device 1000. In addition, the battery cluster 70 is carried on the battery cabinet 100, and the end plate 30 is in contact with the side surface of the battery cluster 70. On the one hand, the battery cluster 70 can provide a clamping force in the first direction X, the clamping force can bear the gravity of the battery monomer 71 in the second direction Z, avoid the gravity of the battery monomer 71 from being extruded, thereby firmly fixing the battery cluster 70 in the battery cabinet 100. The support 80 is located between two battery monomers 71 adjacent in the second direction Z, and can support the battery monomer 71 in the second direction Z, thereby avoiding the battery monomer 71 from being crushed. The support 80 is spaced apart from the two battery monomers 71 adjacent in the second direction Z, and can provide a containing space and a discharge path for the gas in the case of internal overheating of the battery monomer 71 and the gas breaking through the explosion-proof valve 7113, avoid the gas from diffusing in the battery monomer 71, and reduce the risk of thermal runaway.

[0103] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: A battery cabinet includes a housing, the housing having a receiving cavity; End plates are mounted on the battery cabinet and located at opposite ends of the accommodating cavity in the first direction; A battery cluster, each of the accommodating cavities containing at least one battery cluster, the end plate abutting against the side of the battery cluster, the battery cluster comprising at least two battery cells arranged along a second direction, the first direction being perpendicular to the second direction; and The support member is provided on the side of the battery cell away from the bottom surface of the battery cluster in the second direction.

2. The energy storage device according to claim 1, characterized in that, The battery cluster also includes a control box located at the top of the battery cluster. A support member is provided between the control box and the individual battery cells. In the second direction, the support member includes an opposing top and a bottom. The top of the support member is connected to the control box, and the bottom of the support member is connected to the individual battery cells.

3. The energy storage device according to claim 1, characterized in that, The battery cell includes a top cover, and the support member is disposed on the top cover; the top cover is provided with a terminal post, which extends from the top cover toward a second direction, and in the second direction, the height of the terminal post is lower than the height of the support member.

4. The energy storage device according to claim 3, characterized in that, In the second direction and away from the top cover, the area of ​​the cross-section of the support member cut by a plane perpendicular to the second direction gradually decreases.

5. The energy storage device according to claim 3, characterized in that, In the first direction, the support spans and is connected to the two end plates at opposite ends of the accommodating cavity.

6. The energy storage device according to claim 5, characterized in that, The support member includes a first sub-part and a second sub-part. The first sub-part is attached to the battery cell, and the second sub-part is connected to the first sub-part and protrudes relative to the first sub-part in the second direction.

7. The energy storage device according to claim 6, characterized in that, The first sub-part is provided with a through hole, and the top cover is also provided with an explosion-proof valve, with the through hole and the explosion-proof valve being opposite each other.

8. The energy storage device according to claim 6, characterized in that, In the second direction and away from the top cover, the area of ​​the cross section of the second sub-part cut by a plane perpendicular to the second direction gradually decreases.

9. The energy storage device according to claim 6, characterized in that, Each of the support members includes a first sub-part and two second sub-parts. In a third direction, the two second sub-parts are located at opposite ends of the first sub-part. The third direction is perpendicular to both the first direction and the second direction.

10. The energy storage device according to claim 1, characterized in that, The accommodating cavity is at least one, the housing includes two opposing side walls, and the end plate is connected to the side walls; or The battery cabinet also includes longitudinal beams connected to the enclosure and dividing the enclosure into at least two accommodating cavities in a first direction. The end plates in the outermost accommodating cavity are connected to the side wall of the enclosure and the longitudinal beam, respectively; or The battery cabinet also includes longitudinal beams, which are connected to the housing and divide the housing into at least three accommodating cavities in a first direction. The end plates in the outermost accommodating cavity are connected to the side wall of the housing and the longitudinal beams, respectively, and the end plates in the middle accommodating cavity are connected to two opposite longitudinal beams, respectively.

11. The energy storage device according to any one of claims 1-10, characterized in that, The battery cluster further includes a cooling plate connected to the housing, and the cooling plate has a first side and a second side opposite to each other along the first direction, at least one battery cell is disposed on the first side, and at least another battery cell is disposed on the second side.

12. The energy storage device according to claim 11, characterized in that, The housing is provided with a bottom plate, and the cooling plate includes a first sub-plate and a second sub-plate. The first sub-plate is connected to the bottom plate, and the second sub-plate is connected to the first sub-plate at an angle. The second sub-plate has a first side and a second side. The first sub-plate has a first part located on the first side and a second part located on the second side. The battery cell located on the first side is supported on the first part, and the battery cell located on the second side is supported on the second part.

13. The energy storage device according to claim 12, characterized in that, The base plate is provided with a first connecting hole, and the first sub-plate is provided with a second connecting hole. The assembly passes through the first connecting hole and is locked in the second connecting hole to connect the first sub-plate and the base plate.

14. An electrical appliance, characterized in that, The electrical equipment includes the energy storage device according to any one of claims 1-13.

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