Energy storage device and assembly method therefor

Abstract

The present application relates to an energy storage device and an assembly method therefor. The energy storage device of the present application comprises a cabinet body, a plurality of battery modules, and a plurality of trays. An accommodating cavity is formed inside the cabinet body, and the plurality of battery modules are arranged in the accommodating cavity. Any one of the battery modules comprises a plurality of battery cells connected in sequence. The plurality of trays are arranged in the accommodating cavity and are connected to the cabinet body. The plurality of battery modules are correspondingly arranged above the plurality of trays, and at least one battery cell in a same battery module is connected to the corresponding tray. In the energy storage device of the present application, a plurality of battery cells are sequentially connected to form a battery module, and at least one of the battery cells is directly connected to a tray, so that the battery module can be fixed inside a cabinet body, and there is no need to provide a frame structure used for assembling the plurality of battery cells into the battery module, thereby reducing the space occupied by the frame structure in the cabinet body, and further improving the space occupancy rate of the battery module in the cabinet body.

Description

Energy storage device and assembling method of energy storage device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of the following patent applications, the contents of which are incorporated herein by reference in their entirety:

[0003] Chinese Patent Application No. 202411116538.9, filed on August 14, 2024, entitled “Energy storage device and assembling method of energy storage device” with the China National Intellectual Property Administration. TECHNICAL FIELD

[0004] The present application relates to the technical field of batteries, in particular to an energy storage device and an assembling method of the energy storage device. BACKGROUND

[0005] At present, with the continuous growth of global energy demand and the improvement of environmental protection awareness, energy storage technology has gradually become one of the important means to solve energy problems.

[0006] As a new type of energy storage equipment, the energy storage device has the advantages of portability, flexibility, high efficiency, etc., and is widely used in power systems, transportation, aerospace, etc. The battery module as the core component of the energy storage device directly affects the use efficiency and economy of the energy storage device.

[0007] In related technologies, a plurality of battery monomers are surrounded by a frame structure, and are connected into a battery module through the frame structure. Due to the existence of the frame structure, the internal space of the energy storage device is occupied, resulting in a decrease in the available space of the battery module and a decrease in the internal space utilization rate of the energy storage device. SUMMARY

[0008] In view of the defects in the prior art, the purpose of the present application is to provide an energy storage device and an assembling method of the energy storage device, which can effectively solve the problem of low internal space utilization rate of the energy storage device.

[0009] A first aspect of the present application discloses an energy storage device, comprising:

[0010] a cabinet body, an accommodating cavity is formed in the interior of the cabinet body;

[0011] a plurality of battery modules, the plurality of battery modules are arranged in the accommodating cavity, and each battery module comprises a plurality of battery monomers connected in sequence;

[0012] a plurality of trays, the plurality of trays are arranged in the accommodating cavity and connected to the cabinet body;

[0013] Among them, the plurality of battery modules are arranged above the plurality of trays, and at least one battery monomer in the same battery module is connected to the tray.

[0014] According to the energy storage device provided in the application, the plurality of battery monomers are sequentially connected to form the battery module, and at least one of the battery monomers is directly connected to the tray, so that the battery module can be fixed in the interior of the cabinet body, and a frame structure for assembling the plurality of battery monomers into the battery module is not required, thereby reducing the occupied space of the frame structure in the cabinet body, and further improving the space occupancy rate of the battery module in the cabinet body and the utilization rate of the interior space of the cabinet body.

[0015] In some embodiments of the application, the plurality of battery monomers are arranged along a vertical direction, and the battery monomers include a first wall with the largest area, and the first wall faces the top wall of the cabinet body.

[0016] By arranging the plurality of battery monomers along the vertical direction and arranging the first wall to face the top wall of the cabinet body, the size of the battery monomers along the vertical direction can be effectively reduced, that is, the size of the battery module along the vertical direction is reduced, thereby facilitating the arrangement of more battery monomers along the vertical direction in the cabinet body.

[0017] In some embodiments of the application, the plurality of battery monomers in the battery module are sequentially connected, and a lowermost battery monomer in the plurality of battery monomers is connected to the tray.

[0018] By directly connecting the lowermost battery monomer to the tray, a frame structure in the battery module is not required, thereby reducing the occupied space of the frame structure in the cabinet body, and further improving the space occupancy rate of the battery module in the cabinet body and the utilization rate of the interior space of the cabinet body.

[0019] In some embodiments of the application, the battery monomer includes a shell and an electrode terminal arranged on the shell, the shell has a length dimension L1, a width dimension W1 and a height dimension H1, wherein H1

[0020] By arranging the height direction of the shell along the vertical direction and sequentially connecting the plurality of battery monomers along the vertical direction, the size of the battery monomers along the vertical direction can be effectively reduced, that is, the size of the battery module along the vertical direction is reduced, thereby facilitating the arrangement of more battery monomers along the vertical direction in the cabinet body.

[0021] In some embodiments of the application, the accommodating cavity has a length dimension L2, a width dimension W2 and a height dimension H2, wherein L1

[0022] By setting the length direction of the shell to be consistent with the width direction of the accommodating cavity, the number of battery monomers arranged along the width direction of the accommodating cavity, i.e., the number of battery modules arranged along the width direction of the accommodating cavity, can be reduced, thereby facilitating the assembly of the battery modules in the accommodation. Meanwhile, by setting the width direction of the battery body to be consistent with the length direction of the accommodating cavity, the number of battery monomers arranged along the length direction of the accommodating cavity, i.e., the number of battery modules arranged along the length direction of the accommodating cavity, can be increased, thereby improving the energy storage effect in the energy storage device.

[0023] In some embodiments of the present application, the number of battery modules along the length direction of the accommodating cavity is n, and 0.8≤n*W1 / L2<1, where n is a positive integer greater than or equal to 2.

[0024] By setting 0.8≤n*W1 / L2<1, the number of battery modules can be increased without exceeding the length dimension of the accommodating cavity in the cabinet, thereby improving the space utilization in the cabinet.

[0025] In some embodiments of the present application, the number of battery modules along the width direction of the accommodating cavity is s, where 0.8≤s*L1 / W2<1, and s is a positive integer greater than or equal to 1.

[0026] By setting 0.8≤s*L1 / W2<1, the number of battery modules can be increased without exceeding the width dimension of the accommodating cavity in the cabinet, thereby improving the space utilization in the cabinet.

[0027] In some embodiments of the present application, one side of the width direction of the accommodating cavity is provided with a plug-in interface, and the battery module is plugged into the interior of the cabinet through the plug-in interface.

[0028] By providing a plug-in interface on one side of the width direction of the accommodating cavity, the battery module can be plugged into the interior of the cabinet through the plug-in interface along the width direction of the accommodating cavity, thereby facilitating the assembly of the battery module into the cabinet.

[0029] In some embodiments of the present application, the energy storage device further comprises a door body connected to the cabinet, and the door body is configured to open or close the plug-in interface.

[0030] By providing the door body, when one or more battery modules need to be repaired or replaced, the door body can be opened to repair or replace the battery module through the plug-in interface.

[0031] In some embodiments of the present application, the shell is a prismatic shell made of metal, 2000mm≤L1≤2300mm, and 1≤L1 / W1≤3.7.

[0032] By setting the length dimension L1 of the shell to 2000mm≤L1≤2300mm and L1 / W1 to 1≤L1 / W1≤3.7, the length dimension and the width dimension of the shell can be increased, thereby improving the space utilization and energy storage effect of the battery monomer. Meanwhile, by setting the shell to be a prismatic shell made of metal material, the surface area of the battery monomer can be effectively increased, and the heat dissipation capacity of the battery monomer can be improved.

[0033] In some embodiments of the present application, 7mm≤H1≤30mm.

[0034] By setting the height dimension H1 of the shell to 7mm≤H1≤30mm, the height dimension of the shell can be reduced without exceeding the overcurrent limit of the battery monomer, thereby increasing the length dimension and the width dimension of the shell, and further improving the heat dissipation effect of the battery monomer.

[0035] In some embodiments of the present application, 70≤L1 / H1≤320.

[0036] By setting the length dimension and the height dimension of the shell according to the above ratio, the length dimension of the shell can be increased without exceeding the overcurrent limit of the battery monomer, thereby improving the heat dissipation effect of the battery monomer.

[0037] In some embodiments of the present application, 210≤L1 / H1≤320.

[0038] By setting the length dimension and the height dimension of the shell according to the above ratio, the length dimension of the shell can be increased without exceeding the overcurrent limit of the battery monomer, thereby improving the heat dissipation effect of the battery monomer.

[0039] In some embodiments of the present application, the electrode terminal includes a first electrode terminal and a second electrode terminal with opposite polarities, the first electrode terminal and the second electrode terminal are respectively arranged on both sides in the width direction of the shell, the first electrode terminal of one of the two adjacent battery monomers in the battery module and the second electrode terminal of the other one are arranged on the same side and connected by a conductive member.

[0040] By arranging the first electrode terminal of one of the two adjacent battery monomers in the battery module and the second electrode terminal of the other one on the same side and connecting them by a conductive member, the plurality of battery monomers in the battery module can be connected in series, thereby improving the electric quantity of the battery module.

[0041] In some embodiments of the present application, the battery module further includes a heat exchange plate arranged on one side of the shell in the length direction or the width direction and used for heat exchange with the battery monomer.

[0042] By heat exchanging between the heat exchange plate and the battery monomer, the temperature of the battery monomer can be adjusted by the heat exchange plate, thereby improving the heat dissipation effect of the battery monomer.

[0043] In some embodiments of the present application, the battery monomer further comprises a sampling assembly arranged on one side of the length direction or the width direction of the shell and used for collecting the voltage and the temperature of the battery monomer.

[0044] By collecting the voltage and the temperature of the battery monomer through the sampling assembly, the working condition of the battery monomer can be monitored, thereby improving the working reliability of the battery monomer and the battery module.

[0045] In some embodiments of the present application, the energy storage device is a 20-foot container.

[0046] The 20-foot container is a standard part, thereby facilitating the arrangement of the battery module in the cabinet.

[0047] In some embodiments of the present application, the accommodating cavity has a length dimension L2, a width dimension W2 and a height dimension H2, wherein W2

[0048] By arranging the partition and separating the accommodating cavity into multiple cavities through the partition, the battery clusters arranged in different cavities can reduce mutual interference in the working process, thereby improving the working reliability of the energy storage device.

[0049] In some embodiments of the present application, the energy storage device further comprises a fixing plate arranged above the battery module, and at least two adjacent battery modules are respectively connected with the fixing plate.

[0050] By connecting the upper parts of the two adjacent battery modules with the fixing plate respectively, the upper parts of the two adjacent battery modules can be fixed by the fixing plate, thereby improving the connection reliability of the two adjacent battery modules and the fixing effect of the battery module.

[0051] In some embodiments of the present application, the energy storage device further comprises a support arranged in the accommodating cavity and connected with the inner wall of the accommodating cavity, and at least two adjacent trays are connected through the support.

[0052] By connecting the two adjacent trays with the support respectively, the lower parts of the two adjacent trays can be fixed by the support, thereby improving the connection reliability of the two adjacent trays and further improving the fixing effect of the battery module on the tray.

[0053] In some embodiments of the present application, the number of battery modules along the length direction of the accommodating cavity is 8, and the 8 battery modules form 4 battery clusters, and each battery cluster includes two battery modules connected in series, and the number of battery modules along the width direction of the accommodating cavity is 1.

[0054] By arranging 8 battery modules along the length direction of the accommodating cavity and 1 battery module along the width direction of the accommodating cavity, the number of battery modules can be increased without exceeding the accommodating cavity in the cabinet, thereby improving the space utilization in the cabinet.

[0055] In some embodiments of the present application, the energy storage device further comprises a bracket arranged in the accommodating cavity and connected to the inner wall of the accommodating cavity, and a part of the number of trays are connected to the bracket and are used together to divide the accommodating cavity into a plurality of chambers in the vertical direction, and the battery modules are arranged in the chambers.

[0056] The trays are connected to the bracket and are used to divide the accommodating cavity into a plurality of chambers in the vertical direction, thereby facilitating the arrangement of a plurality of battery modules in the cabinet in the vertical direction, and further facilitating the improvement of the space utilization in the vertical direction in the cabinet, and facilitating the arrangement of a plurality of battery modules in the cabinet in various distribution forms.

[0057] In some embodiments of the present application, the energy storage device further comprises a control cabinet, a power distribution cabinet and a busbar cabinet, and the control cabinet, the power distribution cabinet and the busbar cabinet are arranged outside the box body and are electrically connected to the battery modules.

[0058] By arranging the control cabinet, the power distribution cabinet and the busbar cabinet outside the box body, the internal space of the cabinet is reduced, and more battery modules can be arranged in the box body, thereby improving the space utilization in the cabinet.

[0059] The second aspect of the present application proposes an assembling method of an energy storage device, which is used to assemble any of the above energy storage devices, and the energy storage device includes a cabinet body, and an accommodating cavity is formed in the interior of the cabinet body. The assembling method of the energy storage device comprises the following steps:

[0060] Arranging a plurality of battery modules, each battery module including a plurality of battery cells connected in sequence;

[0061] Correspondingly arranging the plurality of battery modules above the plurality of trays, wherein each battery module is connected to the tray through the battery cells;

[0062] Arranging the plurality of connected battery modules and trays in the cabinet body, and connecting the trays to the cabinet body.

[0063] According to the assembling method of the energy storage device, the plurality of battery monomers are sequentially connected and formed into the battery module, and at least one of the battery monomers is directly connected with the tray, without setting a frame structure for assembling the plurality of battery monomers into the battery module, thereby reducing the occupied space of the frame structure in the cabinet body, and further improving the space occupancy rate of the battery module in the cabinet body, and improving the internal space utilization rate of the cabinet body. Meanwhile, the battery module and the tray are connected into an integral whole and are arranged in the interior of the cabinet body, and are connected with the cabinet body through the tray, thereby facilitating the assembly between the battery module and the cabinet body.

[0064] In some embodiments of the present application, the energy storage device further comprises a bracket arranged in the accommodating cavity and connected with the side wall of the accommodating cavity, and the assembling method of the energy storage device further comprises the following steps:

[0065] The plurality of connected battery modules and the tray are arranged in the cabinet body, a part of the trays are connected with the bottom wall of the accommodating cavity, and another part of the trays are arranged above the bracket and connected with the bracket, and the tray and the bracket are used for separating the accommodating cavity into a plurality of chambers in the vertical direction.

[0066] The tray is connected with the bracket and used for separating the accommodating cavity into a plurality of chambers in the vertical direction, thereby facilitating the arrangement of the plurality of battery modules in the vertical direction in the cabinet body, and further facilitating the improvement of the space utilization rate in the vertical direction in the cabinet body, and facilitating the arrangement of the distribution form of the plurality of battery modules in the cabinet body.

[0067] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0068] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings refer to the same or similar components. In the drawings:

[0069] FIG. 1 is a front view of an energy storage device according to an embodiment of the present application;

[0070] FIG. 2 is a top view of an energy storage device according to an embodiment of the present application;

[0071] FIG. 3 is a structural schematic view of a battery module according to an embodiment of the present application;

[0072] FIG. 4 is an axial side view of a battery monomer according to an embodiment of the present application;

[0073] FIG. 5 is a top view of a battery cell according to an embodiment of the present application;

[0074] FIG. 6 is a top view of a battery cell according to another embodiment of the present application;

[0075] FIG. 7 is a top view of a battery cell according to another embodiment of the present application;

[0076] FIG. 8 is a top view of a battery cell according to another embodiment of the present application;

[0077] FIG. 9 is a schematic diagram of a partial structure of an energy storage device according to another embodiment of the present application;

[0078] FIG. 10 is a flowchart of an assembling method of an energy storage device according to an embodiment of the present application.

[0079] Reference signs in the detailed description are as follows:

[0080] 100, battery cell;

[0081] 10, housing; 11, first wall;

[0082] 21, first electrode terminal; 22, second electrode terminal;

[0083] 30, pressure relief mechanism;

[0084] 40, sampling assembly;

[0085] 200, cabinet; 210, partition;

[0086] 300, battery cluster; 310, battery module; 320, conductive member; 330, heat exchange plate;

[0087] 400, tray;

[0088] 500, support;

[0089] 600, fixing plate;

[0090] 700, door body;

[0091] 800, bracket;

[0092] 1000, energy storage device;

[0093] X, length direction of the housing; Y, width direction of the housing; Z, height direction of the housing; A, length direction of the accommodation cavity; B, width direction of the accommodation cavity; C, height direction of the accommodation cavity. DETAILED DESCRIPTION

[0094] The technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0095] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the general meaning understood by the skilled in the art to which the embodiments of the present application belong.

[0096] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships 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 devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0097] In addition, the technical terms "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0098] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0099] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0100] At present, from the development of market situation, the application of power battery is more and more widely. The power battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. Lithium ion battery has been widely used in mobile and portable electric appliances due to its high energy density, high average open circuit voltage and long cycle life.

[0101] As a new type of energy storage device, the energy storage device has the advantages of portability, flexibility and high efficiency, and is widely used in power systems, transportation, aerospace and other fields. The battery module as the core component of the energy storage device directly affects the use efficiency and economy of the energy storage device.

[0102] In the related art, a plurality of battery monomers are surrounded by a frame structure, and are connected into a battery module through the frame structure. Due to the existence of the frame structure, the internal space of the energy storage device is occupied, which reduces the available space of the battery module and reduces the internal space utilization rate of the energy storage device.

[0103] To solve the problem of low internal space utilization rate of the energy storage device, the present application provides an energy storage device and an assembling method of the energy storage device, which does not need to set a frame structure for assembling a plurality of battery monomers into a battery module, thereby reducing the occupied space of the frame structure in the energy storage device, and further improving the space occupation rate of the battery monomer in the energy storage device and the internal space utilization rate of the energy storage device.

[0104] In some embodiments of the present application, the energy storage device can include a cabinet body and one or more battery clusters. The battery cluster is accommodated in the cabinet body.

[0105] The battery cluster can include a plurality of battery modules. The plurality of battery modules are connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0106] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at appropriate times. For example, the energy storage device can store electrical energy during the low electricity consumption valley, and provide electrical energy for related users or electrical equipment during the electricity consumption peak. The energy storage system provided by the embodiments of the present application can be any power system that needs to use the energy storage device.

[0107] In some embodiments of the present application, the energy storage device is an energy storage container or an energy storage cabinet.

[0108] In combination with FIGS. 1-3, in some embodiments of the present application, the first aspect of the present application discloses an energy storage device 1000, the energy storage device 1000 comprising a cabinet 200, a plurality of battery modules 310 and a plurality of trays 400, the cabinet 200 having an accommodating cavity formed in the interior thereof, the plurality of battery modules 310 being arranged in the accommodating cavity, each of the battery modules 310 comprising a plurality of battery cells 100 connected in sequence, and the plurality of trays 400 being arranged in the accommodating cavity and connected with the cabinet 200; wherein the plurality of battery modules 310 are arranged above the trays 400 in correspondence, and at least one of the battery cells 100 in the same battery module 310 is connected with the tray 400.

[0109] The plurality of battery cells in the battery module are connected in series, in parallel or in a mixed manner by the conductive member. Specifically, the cabinet 200 has a substantially cuboid structure, and an accommodating cavity for accommodating the battery modules 310 is formed in the interior thereof. The battery modules 310 are arranged in the accommodating cavity through the trays 400, and the cabinet 200 can protect the battery modules 310 in the interior thereof. Optionally, the plurality of battery modules 310 can be collectively arranged above the same tray 400, or the plurality of battery modules 310 can be arranged above the plurality of trays 400 in one-to-one correspondence. The tray 400 is used to carry and support the battery module 310, and the battery module 310 can be placed into the accommodating cavity together with the tray 400 assembled, or the tray 400 can be placed in the accommodating cavity first, and then the battery module 310 is placed in the accommodating cavity, and at least one of the battery cells 100 in the battery module 310 is selected to be connected with the tray 400, so as to fix the battery module 310 in the interior of the cabinet 200. Among them, the battery module 310 can be fixedly connected with the tray 400, such as welding, bonding, etc., so as to improve the connection reliability between the battery module 310 and the tray 400. Alternatively, the battery module 310 can be detachably connected with the tray 400, such as clamping or connecting through a connecting member, so as to facilitate the disassembly between the battery module 310 and the tray 400. Among them, the battery module 310 comprises a plurality of battery cells 100 connected in sequence in the same direction, and the plurality of battery cells can be bonded with each other, or the two adjacent battery cells are respectively provided with a clamping structure, and the two battery cells are clamped through the clamping structure. The tray 400 can be connected with the end battery cell 100 in the plurality of battery cells 100 arranged in sequence, or the tray 400 can be connected with one or several battery cells 100 at the middle position of the m battery cells 100 arranged in sequence.

[0110] According to the energy storage device 1000 of the present application, by connecting the plurality of battery monomers 100 in sequence to form the battery module 310 and directly connecting at least one battery monomer 100 with the tray 400, the battery module 310 can be fixed inside the cabinet body 200, and there is no need to set a frame structure for assembling the plurality of battery monomers 100 into the battery module 310, thereby reducing the occupied space of the frame structure in the cabinet body 200, and further improving the space occupancy rate of the battery module 310 in the cabinet body 200, and improving the internal space utilization rate of the cabinet body 200.

[0111] In combination with FIGS. 1-5, in some embodiments of the present application, the plurality of battery monomers 100 are arranged in a vertical direction, and the battery monomer 100 includes a first wall 11 with the largest area, and the first wall 11 faces the top wall of the cabinet body 200.

[0112] Specifically, the battery monomer 100 includes a plurality of outer wall surfaces, and the outer wall surface with the largest area forms the first wall 11 of the battery monomer 100. The first wall 11 is arranged to face the top wall of the cabinet body 200, and when the cabinet body 200 is placed, the top wall is generally arranged at the top of the cabinet body 200 in the vertical direction, i.e., the first walls 11 of the plurality of battery monomers 100 are arranged in the vertical direction.

[0113] In some embodiments of the present application, the plurality of battery monomers 100 can also be arranged in a horizontal direction, and the first wall 11 faces the side wall of the cabinet body 200. Optionally, the first wall 11 can be arranged parallel to the vertical direction, so that the first walls 11 of the plurality of battery monomers 100 are arranged in the horizontal direction. The tray 400 is arranged below the battery module 310 and can be connected with one or more battery monomers 100.

[0114] By arranging the plurality of battery monomers 100 in the vertical direction and arranging the first wall 11 to face the top wall of the cabinet body 200, the size of the battery monomer 100 occupied in the vertical direction can be effectively reduced, i.e., the size of the battery module 310 occupied in the vertical direction is reduced, thereby facilitating the arrangement of more battery monomers 100 in the vertical direction in the cabinet body 200.

[0115] In combination with FIGS. 1-5, in some embodiments of the present application, the plurality of battery monomers 100 in the battery module 310 are connected in sequence, and the battery monomer 100 located at the lowermost position in the plurality of battery monomers 100 is connected with the tray 400.

[0116] Specifically, the plurality of battery monomers 100 are arranged in sequence along the vertical direction and can be connected through the first wall 11. The specific connection mode can be bonding or clamping. The lowermost battery monomer 100 is connected with the tray 400. Optionally, the battery monomer 100 can be connected with the tray 400 through the first wall 11. The specific connection mode can be bonding, clamping or bolt connection.

[0117] By directly connecting the lowermost battery monomer 100 with the tray 400, there is no need to set a frame structure in the battery module 310, thereby reducing the occupied space of the frame structure in the cabinet 200, and further improving the space occupancy rate of the battery module 310 in the cabinet 200, and improving the internal space utilization rate of the cabinet 200. In combination with FIGS. 1 to 5, in some embodiments of the present application, the battery monomer 100 includes a shell 10 and an electrode terminal arranged on the shell 10. The shell 10 has a length dimension L1, a width dimension W1 and a height dimension H1, wherein H1 < W1 ≤ L1. The length direction and the width direction of the shell 10 extend along the horizontal direction respectively, and the height direction of the shell 10 extends along the vertical direction.

[0118] Specifically, the battery monomer 100 includes a shell 10 and an electrode terminal protruding outside the shell 10. The shell 10 can be a strip-shaped structure or a block-shaped structure, and has a length dimension L1, a width dimension W1 and a height dimension H1, wherein H1 < W1 ≤ L1. The inside of the shell 10 forms an electrode assembly, which is a component that undergoes an electrochemical reaction in the battery monomer 100. The inside of the shell 10 can contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually arranged between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting a main body portion of the electrode assembly, and a portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab (not shown in the figure). The positive tab and the negative tab can be located at one end of the main body portion or at two ends of the main body portion respectively. In the charging and discharging process of the battery monomer 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminal to form a current loop. The shell 10 forms the overall appearance structure of the shell 10, which can be a heat-conducting member formed of a metal material. In addition to having good heat conduction performance, the metal shell also has sufficient structural strength, so that the shell 10 is not easy to deform when subjected to extrusion and collision, thereby improving the safety performance of the shell 10. Optionally, the material of the shell 10 can be steel, iron, aluminum, aluminum alloy, etc.

[0119] In some embodiments of the present application, the length direction of the shell 10 is the length direction of the battery module 310, the width direction of the shell 10 is the width direction of the battery module 310, and the height direction of the shell 10 is the height direction of the battery module 310. The shell length direction X and the shell width direction Y extend along the horizontal direction respectively, the shell height direction Z extends along the vertical direction, and the plurality of battery monomers 100 are sequentially bonded along the vertical direction, that is, the plurality of battery monomers 100 are sequentially connected by the large surface of the shell 10, which can be bonding, thereby improving the connection reliability between the plurality of battery monomers 100. At the same time, the battery monomer 100 located at the lowermost position in the plurality of battery monomers 100 is connected to the tray 400 by the first wall 11, which can be bonding, thereby improving the connection reliability between the battery module 310 and the tray 400.

[0120] By extending the height direction of the shell 10 along the vertical direction and sequentially connecting the plurality of battery monomers 100 along the vertical direction, the size occupied by the battery monomer 100 along the vertical direction, that is, the size occupied by the battery module 310 along the vertical direction, can be effectively reduced, thereby facilitating the arrangement of more battery monomers 100 along the vertical direction in the cabinet body 200.

[0121] In combination with FIGS. 1-5, in some embodiments of the present application, the accommodating cavity has a length dimension L2, a width dimension W2, and a height dimension H2, wherein L1

[0122] Specifically, the accommodating cavity length direction A is the length direction of the cabinet body 200, the accommodating cavity width direction B is the width direction of the cabinet body 200, and the accommodating cavity height direction C is the height direction of the cabinet body 200. The accommodating cavity length direction A and the accommodating cavity width direction B extend along the horizontal direction respectively, and the shell length direction X is consistent with the accommodating cavity width direction B, and the shell width direction Y is consistent with the accommodating cavity length direction A. The accommodating cavity height direction C extends along the vertical direction and is consistent with the shell height direction Z.

[0123] By setting the length direction of the shell 10 consistent with the width direction of the accommodating cavity, the number of battery monomers 100 arranged along the width direction of the accommodating cavity, that is, the number of battery modules 310 arranged along the width direction of the accommodating cavity, can be reduced, thereby facilitating the assembly of the battery module 310 in the accommodation. At the same time, by setting the width direction of the shell 10 consistent with the length direction of the accommodating cavity, the number of battery monomers 100 arranged along the length direction of the accommodating cavity, that is, the number of battery modules 310 arranged along the length direction of the accommodating cavity, can be increased, thereby improving the energy storage effect in the energy storage device 1000.

[0124] In some embodiments of the present application, the number of battery modules 310 along the length direction of the accommodating cavity is n, and 0.8≤n*W1 / L2<1, where n is a positive integer greater than or equal to 2.

[0125] Specifically, n*W1 represents the sum of the width dimensions of the n battery modules 310. n*W1 / L2 can be any value between 0.8 and 0.85, 0.95, 1, inclusive of 0.8 but not inclusive of 1.

[0126] By setting 0.8≤n*W1 / L2<1, the number of battery modules 310 can be increased without exceeding the length dimension of the accommodating cavity in the cabinet 200, thereby improving the space utilization in the cabinet 200.

[0127] In some embodiments of the present application, the number of battery modules along the width direction of the accommodating cavity is s, where 0.8≤s*L1 / W2<1, and s is a positive integer greater than or equal to 1.

[0128] Specifically, s*L1 represents the sum of the length dimensions of the s battery modules 310. s*L1 / W2 can be any value between 0.8 and 0.85, 0.95, 1, inclusive of 0.8 but not inclusive of 1.

[0129] By setting the above proportions, the number of battery modules 310 can be increased without exceeding the width dimension of the accommodating cavity in the cabinet 200, thereby improving the space utilization in the cabinet 200.

[0130] In some embodiments of the present application, the n battery modules 310 arranged along the length direction of the accommodating cavity form at least one battery cluster 300. The battery cluster 300 includes at least 2t battery modules 310 arranged at intervals along the length direction of the accommodating cavity and connected in series. Any one battery module 310 includes m battery monomers 100. The voltage of the battery cluster 300 is U, and the voltage of the battery monomer 100 is v, where m=U / v / 2t, and t is a positive integer greater than or equal to 1.

[0131] Specifically, the battery cluster 300 includes at least two battery modules 310 arranged along the length direction of the accommodating cavity, and the at least two battery modules 310 are connected in series and form the battery cluster 300. In order to facilitate wiring between the battery modules 310 in the same battery cluster 300, the number of the battery modules 310 of the battery cluster 300 is set to 2t, that is, an even number, so that when the wire is led from below one of the battery modules 310, the wire can be led out through below another of the battery modules 310. Alternatively, when the wire is led from above one of the battery modules 310, the wire can be led out through above another of the battery modules 310.

[0132] By setting the number of the battery modules 310 in the battery cluster 300 to 2t, that is, an even number, wiring between the battery modules 310 in the same battery cluster 300 is facilitated. At the same time, by the formula m=U / v / 2t, the number of the battery modules 310 of the battery cluster 300 can be calculated when the voltage U of the battery cluster 300, the voltage v of the battery monomer 100 and the number of the battery monomers 100 in a single battery module 310 are known, or the number of the battery monomers 100 in a single battery module 310 can be calculated when the voltage U of the battery cluster 300, the voltage v of the battery monomer 100 and the number of the battery modules 310 in the battery cluster 300 are known.

[0133] For the convenience of description, in the embodiments of the present application, only the battery monomer 100 is taken as a lithium iron phosphate battery monomer, and the energy storage device 1000 is taken as a 20-foot container as an example for description. Among them, the length dimension L1 of the shell 10 is 2200mm, and the width dimension W1 of the shell 10 is 630mm. The voltage U of the battery cluster 300 ranges from 1000V to 2500V, and the upper limit voltage of the battery monomer 100 is 3.65V. The maximum length dimension of the internal accommodating cavity of the cabinet body 200 is L2=5746mm, the maximum width dimension is W2=2250mm, and the maximum height dimension is H2=2452mm.

[0134] Alternatively, when the battery cluster 300 includes two battery modules 310 connected in series, and the voltage U of the battery cluster 300 is 1500V, t=1, and m=U / v / 2t=1500 / 3.65 / 2=205, that is, the number of battery monomers in a single battery module 310 is 205. At this time, in order to satisfy that the height dimension of a single battery module 205 is less than the height dimension H2 of the accommodating cavity, the height dimension H1 of the shell 10 can be 10.5mm.

[0135] Optionally, when the battery cluster 300 includes four battery modules 310 connected in series, and the voltage U of the battery cluster 300 is 2300V, at this time t=2, m=U / v / 2t=2300 / 3.65 / 4=158, that is, the number of battery monomers 100 in a single battery module 310 is 158. At this time, in order to meet the requirement that the height dimension H1 of the shell 10 is less than the height dimension H2 of the accommodating cavity, the height dimension H1 of the shell 10 can be 14.1mm.

[0136] In combination with FIGS. 1-3, in some embodiments of the present application, one side of the width direction of the accommodating cavity is provided with a plug-in interface, and the battery module 310 is plugged into the interior of the cabinet body 200 through the plug-in interface.

[0137] Specifically, the side where the length direction A of the accommodating cavity and the height direction C of the accommodating cavity are located together is formed with a plug-in interface, and the battery module 310 is plugged into the interior of the cabinet body 200 along the width direction B of the accommodating cavity.

[0138] By providing the plug-in interface on one side of the width direction of the accommodating cavity, the battery module 310 can be plugged into the interior of the cabinet body 200 through the plug-in interface along the width direction of the accommodating cavity, which facilitates the assembly of the battery module 310 into the cabinet body 200.

[0139] In combination with FIGS. 1-3, in some embodiments of the present application, the energy storage device 1000 further includes a door body 700, the door body 700 is connected with the cabinet body 200, and the door body 700 is configured to open or close the plug-in interface.

[0140] Specifically, the door body 700 is arranged on the side of the accommodating cavity having the plug-in interface and is rotatably connected with the cabinet body 200, thereby facilitating the opening or closing of the plug-in interface. Alternatively, the door body 700 can also be connected with the cabinet body 200 in a push-pull manner, thereby facilitating the opening or closing of the plug-in interface.

[0141] By providing the door body 700, when one or more battery modules 310 need to be repaired or replaced, the door body 700 can be opened to repair or replace the battery module 310 through the plug-in interface.

[0142] In combination with FIGS. 4 and 5, in some embodiments of the present application, the shell 10 is a prismatic shell made of metal, 2000mm≤L1≤2300mm, 1≤L1 / W1≤3.7.

[0143] Specifically, the shell 10 can be a cuboid or a square metal shell. L1 can be any value between 2000mm...2100mm...2200mm...2300mm. The ratio of L1 / W1 can be any value between 1...1.5...2...2.5...3...3.7.

[0144] By setting the length dimension L1 of the shell 10 to 2000mm≤L1≤2300mm and L1 / W1 to 1≤L1 / W1≤3.7, the length dimension and the width dimension of the shell 10 can be increased, thereby improving the space utilization and energy storage effect of the battery monomer 100. Meanwhile, the shell 10 is set to be a prismatic shell made of metal material, which can effectively increase the surface area of the battery monomer 100 and improve the heat dissipation capacity of the battery monomer 100.

[0145] In some embodiments of the present application, 7mm≤H1≤30mm.

[0146] Specifically, H1 can be any value between 7mm…10mm…15mm…20mm…30mm.

[0147] By setting the height dimension H1 of the shell 10 to 7mm≤H1≤30mm, the height dimension of the shell 10 can be reduced without exceeding the overcurrent limit of the battery monomer 100, thereby increasing the length dimension and the width dimension of the shell 10, and further improving the heat dissipation effect of the battery monomer 100.

[0148] In some embodiments of the present application, 70≤L1 / H1≤320.

[0149] Specifically, the ratio of L1 / H1 can be any value between 70…100…150…200…300…320.

[0150] By setting the length dimension and the height dimension of the shell 10 according to the above ratio, the length dimension of the shell 10 can be increased without exceeding the overcurrent limit of the battery monomer 100, thereby improving the heat dissipation effect of the battery monomer 100.

[0151] In some embodiments of the present application, 210≤L1 / H1≤320.

[0152] Specifically, the ratio of L1 / H1 can be any value between 210…250…300…320.

[0153] By setting the length dimension and the height dimension of the shell 10 according to the above ratio, the length dimension of the shell 10 can be increased without exceeding the overcurrent limit of the battery monomer 100, thereby improving the heat dissipation effect of the battery monomer 100.

[0154] In some embodiments of the present application, the shell 10 has a volume dimension V, where V=L1*W1*H1, and 0.000014 / mm 2 ≤L1 / V≤0.000265 / mm2 .

[0155] Specifically, the shell 10 is a cuboid or a cube, and has a volume size V=L1*W1*H1. The ratio of L1 / V can be any value between 0.000014 / mm2 and 0.000265 / mm2. 2 ... 0.0001 / mm 2 ... 0.0002 / mm 2 ... 0.000265 / mm 2 .

[0156] By setting the length size and volume size of the shell 10 according to the above ratio, the length size of the shell 10 can be increased without exceeding the overcurrent limit of the battery monomer 100, thereby improving the space utilization of the battery monomer 100.

[0157] As shown in FIGS. 4 and 5, in some embodiments of the present application, the shell 10 has a volume size V, where V=L1*W1*H1, and 0.00000019 / mm2≤H1 / V≤0.00000093 / mm2.

[0158] Specifically, the ratio of H1 / V can be any value between 0.00000019 / mm2 and 0.00000093 / mm2. 2 ... 0.00000050 / mm 2 ... 0.00000070 / mm 2 ... 0.00000093 / mm 2 .

[0159] By setting the height size and volume size of the shell 10 according to the above ratio, the height size of the shell 10 can be reduced without exceeding the overcurrent limit of the battery monomer 100, thereby increasing the length size and width size of the shell 10, and improving the heat dissipation effect of the battery monomer 100.

[0160] As shown in FIGS. 4 and 5, in some embodiments of the present application, the shell 10 has a volume size V, where V=L1*W1*H1, and 0.000014 / mm2≤W1 / V≤0.000071 / mm2.

[0161] Specifically, the ratio of W1 / V can be any value between 0.000014 / mm2 and 0.000071 / mm2. 2 ... 0.000035 / mm 2 ... 0.000065 / mm 2 ... 0.000071 / mm 2 .

[0162] By setting the width dimension and the volume dimension of the shell 10 according to the above ratio, the width dimension of the shell 10 can be increased without exceeding the overcurrent limit of the battery monomer 100, and thus the heat dissipation effect of the battery monomer 100 can be improved.

[0163] In some embodiments of the present application, the shell 10 has a surface area dimension S and a volume dimension V, where S = 2L1*W1+2L1*H1+2W1*H1, V = L1*W1*H1, and 0.067 / mm≤S / V≤0.286 / mm.

[0164] Specifically, the surface area of the shell 10 refers to the sum of the areas of all the outer surfaces of the shell 10. The ratio of S / V can be any value between 0.067 / mm and 0.286 / mm.

[0165] By setting 0.067 / mm≤S / V≤0.286 / mm, the surface area of the shell 10 can be increased, and thus the heat dissipation effect of the battery monomer 100 can be improved.

[0166] In some embodiments of the present application, the battery monomer 100 has a capacity E, where 0.1212mm / Ah≤L1 / E≤1.74mm / Ah.

[0167] Specifically, the ratio of L1 / E can be any value between 0.1212mm / Ah and 1.74mm / Ah.

[0168] When the battery monomers 100 with different length dimensions have the same capacity E, the smaller the ratio of L1 / E, the greater the capacity value per unit length dimension, and the greater the capacity density. By setting the length dimension of the shell 10 and the capacity E of the battery monomer 100 according to the above ratio, the capacity density per unit length dimension of the battery monomer 100 can be effectively improved.

[0169] In some embodiments of the present application, 0.1212mm / Ah≤L1 / E≤0.8mm / Ah.

[0170] Specifically, the ratio of L1 / E can be any value between 0.1212mm / Ah and 0.8mm / Ah.

[0171] By setting the length dimension of the shell 10 and the capacity E of the battery monomer 100 according to the above ratio, the capacity density per unit length dimension of the battery monomer 100 can be improved.

[0172] In some embodiments of the present application, the shell 10 has a surface area size S, and the battery cell 100 has a capacity E, wherein S = 2L1*W1+2L1*H1+2W1*H1, 130.9mm 2 / Ah≤S / E≤3680mm 2 / Ah.

[0173] Specifically, the ratio of S / E can be 130.9mm 2 / Ah... 1000mm 2 / Ah... 2000mm 2 / Ah... 3680mm 2 / Ah.

[0174] By setting 130.9mm 2 / Ah≤S / E≤3680mm 2 / Ah, the capacity density of the battery cell 100 per unit area can be improved.

[0175] In some embodiments of the present application, the shell 10 has a volume size V, and the battery cell 100 has a capacity E, wherein V = L1*W1*H1, 3024mm 3 / Ah≤V / E≤55200mm 3 / Ah.

[0176] Specifically, the ratio of V / E can be 3024mm 3 / Ah... 20000mm 3 / Ah... 30000mm 3 / Ah... 55200mm 3 / Ah.

[0177] By setting 3024mm 3 / Ah≤V / E≤55200mm 3 / Ah, the capacity density of the battery cell 100 per unit volume can be improved.

[0178] In some embodiments of the present application, the energy storage device 1000 is a 20-foot container.

[0179] Specifically, the 20-foot container can be a GBT1413-2023 series 1 container. The width dimension of the cabinet 200 is 2438 mm. The length dimension of the cabinet 200 is 6100 mm. The height dimension of the cabinet 200 can be 2896 mm or 2591 mm. When the height dimension of the cabinet 200 is 2896 mm, the box type is 1CCC type. When the height dimension of the cabinet 200 is 2591 mm, the box type is 1CC type. Among them, the maximum length dimension L2 of the internal accommodating cavity of the cabinet 200 is 5746 mm, the maximum width dimension W2 is 2250 mm, and the maximum height dimension H2 is 2452 mm.

[0180] The 20-foot container is a standard part, so as to facilitate the arrangement of the battery module 310 in the cabinet 200.

[0181] Based on the internal space arrangement of the 20-foot container, taking the lithium iron phosphate battery monomer as an example, the size of the battery monomer 100 is set as shown in the following table (I), which can maximize the space utilization of the internal accommodating cavity of the cabinet 200. Among them, the electric quantity E' represents the electric quantity of the battery monomer 100.

[0182] Table (I)

[0183] In combination with FIGS. 3 to 5, in some embodiments of the present application, the electrode terminal includes a first electrode terminal 21 and a second electrode terminal 22 with opposite polarities, the first electrode terminal 21 and the second electrode terminal 22 are respectively arranged on both sides of the width direction of the shell 10, the first electrode terminal 21 of one of the two adjacent battery monomers 100 in the battery module 310 and the second electrode terminal 22 of the other one are arranged on the same side and connected through the conductive piece 320.

[0184] Specifically, the electrode terminal of the battery monomer 100 can include a first electrode terminal 21 and a second electrode terminal 22, the first electrode terminal 21 and the second electrode terminal 22 are respectively arranged at both ends of the width direction of the shell 10, the first electrode terminal 21 can be connected with the positive electrode tab and form a positive electrode terminal. The second electrode terminal 22 can be connected with the negative electrode tab and form a negative electrode terminal. The plurality of battery monomers 100 in the battery module 310 can be connected in sequence through the first wall 11, and the first electrode terminal 21 of one of the two adjacent battery monomers 100 and the second electrode terminal 22 of the other one are commonly arranged on the same side of the width direction of the battery monomer 100 and connected through the conductive piece 320, so that the plurality of battery monomers 100 in the same battery module 310 are connected in series. Among them, the conductive piece 320 can be a conductive sheet.

[0185] By setting the first electrode terminal 21 of one of the two adjacent battery monomers 100 in the battery module 310 and the second electrode terminal 22 of the other one of the two adjacent battery monomers 100 on the same side and connecting them through the conductive member 320, the plurality of battery monomers 100 in the battery module 310 can be connected in series, thereby increasing the power of the battery module 310.

[0186] In combination with FIGS. 3 and 6, in some embodiments of the present application, the electrode terminals of the battery monomer 100 can include a first electrode terminal 21 and a second electrode terminal 22, the first electrode terminal 21 and the second electrode terminal 22 are respectively set on the two sides of the length direction of the shell 10, and the first electrode terminal 21 of one of the two adjacent battery monomers 100 and the second electrode terminal 22 of the other one of the two adjacent battery monomers 100 are set on the same side of the length direction of the shell 10 and connected through the conductive member 320, thereby connecting the plurality of battery monomers 100 in the same battery module 310 in series.

[0187] The first electrode terminal 21 and the second electrode terminal 22 can be reasonably selected in the setting position on the shell 10 according to the wiring requirement, thereby facilitating the connection of the first electrode terminal 21 and the second electrode terminal 22 with the external wiring.

[0188] In combination with FIGS. 3 and 7, in some embodiments of the present application, the battery monomer 100 includes a plurality of first electrode terminals 21 and a plurality of second electrode terminals 22, the polarities of the first electrode terminals 21 and the second electrode terminals 22 are opposite, wherein the plurality of first electrode terminals 21 are commonly set on one side of the width direction of the shell 10 and are arranged at intervals along the length direction of the shell 10, and the plurality of second electrode terminals 22 are commonly set on the other side of the width direction of the shell 10 and are arranged at intervals along the length direction of the shell 10. And the first electrode terminal 21 of one of the two adjacent battery monomers 100 and the second electrode terminal 22 of the other one of the two adjacent battery monomers 100 are commonly set on the same side of the length direction of the shell 10 and connected through the conductive member 320, thereby connecting the plurality of battery monomers 100 in the same battery module 310 in series.

[0189] In combination with FIG. 3 and FIG. 8, in some embodiments of the present application, the battery cell 100 includes a plurality of first electrode terminals 21 and a plurality of second electrode terminals 22, the plurality of first electrode terminals 21 are respectively arranged on both sides of the width direction of the shell 10, the plurality of second electrode terminals 22 are respectively arranged on both sides of the width direction of the shell 10, the first electrode terminals 21 and the second electrode terminals 22 on the same side are arranged at intervals along the length direction of the shell 10, and the first electrode terminals 21 and the second electrode terminals 22 on both sides are arranged oppositely along the width direction of the shell 10. The first electrode terminal 21 of one of the two adjacent battery cells 100 and the second electrode terminal 22 of the other battery cell 100 on the same side are connected by the conductive member 320, so that the plurality of battery cells 100 in the same battery module 310 are connected in series.

[0190] The plurality of first electrode terminals 21 and the plurality of second electrode terminals 22 can be reasonably selected in the setting position on the shell 10 according to the wiring requirement, so as to facilitate the connection of the first electrode terminals 21 and the second electrode terminals 22 with the external wiring respectively.

[0191] As shown in FIG. 3, in some embodiments of the present application, the battery module 310 further includes a heat exchange plate 330, the heat exchange plate 330 is arranged on one side of the length direction or the width direction of the shell 10 and is used for heat exchange with the battery cell 100.

[0192] Specifically, the heat exchange plate 330 is a generally flat plate structure and is arranged on one side of the length direction or the width direction of the shell 10. Alternatively, the heat exchange plate 330 can be adhered to one side of the width direction of the battery module 310 by a heat-conducting adhesive and heat-exchanged with the plurality of battery cells 100 respectively.

[0193] By heat-exchanging the heat exchange plate 330 with the battery cell 100, the temperature of the battery cell 100 can be adjusted through the heat exchange plate 330, so as to improve the heat dissipation effect of the battery cell 100.

[0194] In combination with FIG. 4 and FIG. 5, in some embodiments of the present application, the battery cell 100 further includes at least one pressure relief mechanism 30, at least one end of the width direction or the length direction of the shell 10 is provided with the pressure relief mechanism 30, and the pressure relief mechanism 30 is configured to release the internal pressure of the shell 10 when the internal pressure or temperature of the shell 10 reaches a threshold value.

[0195] Specifically, the pressure relief mechanism 30 can be arranged on the side wall of the shell 10 other than the first wall 11, and can be on the same side, the opposite side or the adjacent side of the first electrode terminal 21. Alternatively, the pressure relief mechanism 30 is an explosion-proof valve.

[0196] By setting the pressure relief mechanism 30 on the shell 10, when the internal pressure or temperature of the shell 10 reaches a threshold value, the pressure relief mechanism 30 can open and release the internal pressure of the shell 10, thereby improving the safety performance of the battery monomer 100.

[0197] In combination with FIGS. 4 and 5, in some embodiments of the present application, the number of pressure relief mechanisms 30 is multiple, the multiple pressure relief mechanisms 30 are collectively arranged on one side of the shell 10 in the width direction, and the multiple pressure relief mechanisms 30 are arranged in the length direction of the shell 10.

[0198] By setting multiple pressure relief mechanisms 30 and arranging the multiple pressure relief mechanisms 30 on one side of the shell 10 in the width direction along the length direction of the shell 10, when the internal pressure or temperature of the shell 10 reaches a threshold value, one or several of the multiple pressure relief mechanisms 30 can open and release the internal pressure of the shell 10, thereby improving the safety performance of the battery monomer 100.

[0199] In combination with FIGS. 4 and 5, in some embodiments of the present application, the battery monomer 100 further includes a sampling assembly 40 arranged on one side of the shell 10 in the length direction or the width direction and used for collecting the voltage and temperature of the battery monomer 100.

[0200] Specifically, the sampling assembly 40 can be a sampling chip and is arranged on one side of the shell 10 in the length direction or the width direction. Optionally, the sampling assembly 40 can be attached to one side of the shell 10 in the length direction.

[0201] By collecting the voltage and temperature of the battery monomer 100 through the sampling assembly 40, the working condition of the battery monomer 100 can be monitored, thereby improving the working reliability of the battery monomer 100 and the battery module 310.

[0202] In combination with FIGS. 1 to 3, in some embodiments of the present application, the accommodating cavity has a length dimension L2, a width dimension W2, and a height dimension H2, wherein W2

[0203] Specifically, the partition piece 210 is arranged in the vertical direction, and both ends of the partition piece 210 in the vertical direction are connected with the top wall and the bottom wall of the cabinet body 200, respectively. Both ends of the partition piece 210 in the horizontal direction are connected with the two side walls of the cabinet body 200 in the width direction, respectively, so as to divide the accommodating cavity in the cabinet body 200 into multiple cavities in the length direction. Optionally, the partition piece can be a partition plate or a partition beam.

[0204] By setting the partition 210 and separating the containing cavity into multiple cavities through the partition 210, the battery clusters 300 arranged in different cavities can reduce mutual interference in the working process, thereby improving the working reliability of the energy storage device 1000.

[0205] In combination with FIGS. 1-3, in some embodiments of the present application, the energy storage device 1000 further comprises a fixing plate 600, which is arranged above the battery modules 310, and at least two adjacent battery modules 310 are respectively connected with the fixing plate 600.

[0206] Specifically, the battery cells 100 at the uppermost positions of the two adjacent battery modules 310 can be fixedly connected with the fixing plate 600, such as welding, bonding, etc., thereby improving the connection reliability between the two adjacent battery modules 310. Alternatively, the battery cells 100 at the uppermost positions of the two adjacent battery modules 310 can be detachably connected with the fixing plate 600, such as clamping or connecting through a connecting piece, thereby improving the connection reliability between the two adjacent battery modules 310, and facilitating the disassembly and assembly between the battery modules 310 and the fixing plate 600.

[0207] By connecting the upper parts of the two adjacent battery modules 310 with the fixing plate 600 respectively, the upper parts of the two adjacent battery modules 310 can be fixed by the fixing plate 600, thereby improving the connection reliability of the two adjacent battery modules 310 and the fixing effect on the battery modules 310.

[0208] In combination with FIGS. 1-3, in some embodiments of the present application, the energy storage device 1000 further comprises a support 500, which is arranged in the containing cavity and connected with the inner wall of the containing cavity, and the two adjacent trays 400 are connected through the support 500.

[0209] Specifically, the support 500 is arranged in the containing cavity and fixedly connected or detachably connected with the inner wall of the containing cavity, and can be connected with the bottom wall of the containing cavity. The two adjacent trays 400 are connected through the support 500, including fixed connection or detachable connection. The fixed connection includes welding or bonding, and the detachable connection includes clamping or connecting through a connecting piece.

[0210] By connecting the two adjacent trays 400 with one support 500 respectively, the two adjacent trays 400 can be fixed by the support 500, thereby improving the connection reliability of the two adjacent trays 400, the fixing effect on the trays 400, and further the fixing effect on the battery modules 310 on the trays 400.

[0211] In combination with FIGS. 1-3, in some embodiments of the present application, the number of battery modules 310 along the length direction of the accommodation cavity is 8, and the 8 battery modules 310 form 4 battery clusters 300, and each battery cluster 300 includes two battery modules 310 connected in series, and the number of battery modules 310 along the width direction of the accommodation cavity is 1.

[0212] Specifically, two adjacent battery modules 310 are connected in series and form a battery cluster 300, thereby improving the output power of the battery cluster 300. Meanwhile, two adjacent battery clusters 300 can be spaced apart by the partition 210.

[0213] By arranging 8 battery modules 310 along the length direction of the accommodation cavity and arranging 1 battery module 310 along the width direction of the accommodation cavity, the number of battery modules 310 can be increased without exceeding the accommodation cavity in the cabinet 200, thereby improving the space utilization in the cabinet 200.

[0214] In combination with FIGS. 1 and 9, in some embodiments of the present application, the energy storage device 1000 further includes a bracket 800 arranged in the accommodation cavity and connected to the inner wall of the accommodation cavity, and a part of the trays 400 are connected to the bracket 800 and are used together to divide the accommodation cavity into multiple chambers in the vertical direction, and the chambers are provided with battery modules 310.

[0215] Specifically, the bracket 800 is arranged in the accommodation cavity and is fixedly connected or detachably connected to the inner wall of the accommodation cavity, and can be connected to the side wall of the accommodation cavity. The tray 400 can be arranged above the bracket 800 and is fixedly connected or detachably connected to the bracket 800. The fixed connection includes welding or bonding, and the detachable connection includes clamping or connecting through a connecting piece. Meanwhile, the same chamber can be provided with multiple battery modules 310 arranged in the horizontal direction, and the multiple battery modules 310 in the same chamber are connected in series and form a battery cluster 300.

[0216] The tray 400 is connected to the bracket 800 and is used to divide the accommodation cavity into multiple chambers in the vertical direction, thereby facilitating the arrangement of multiple battery modules 310 in the vertical direction in the cabinet 200, and further facilitating the improvement of the space utilization in the vertical direction in the cabinet 200, and facilitating the arrangement of multiple distribution forms of battery modules 310 in the cabinet 200.

[0217] In combination with FIGS. 1-3, in some embodiments of the present application, the energy storage device 1000 further includes a control cabinet, a power distribution cabinet, and a busbar cabinet, and the control cabinet, the power distribution cabinet, and the busbar cabinet are respectively arranged outside the cabinet 200 and are electrically connected to the battery modules 310.

[0218] Specifically, the control cabinet is used for monitoring and protecting the battery module 310. The power distribution cabinet is used for supplying power to other electrical equipment in the energy storage device 1000, such as fire-fighting, liquid cooling unit, etc. The busbar cabinet is used for collecting the voltage of a plurality of battery modules 310. The cabinet body 200 is mainly used for storing the battery module 310 and the line connected with the battery module 310.

[0219] By arranging the control cabinet, the power distribution cabinet and the busbar cabinet outside the cabinet body 200, the internal space of the cabinet body 200 occupied by the control cabinet, the power distribution cabinet and the busbar cabinet is reduced, and more battery modules 310 can be arranged in the cabinet body 200, thereby improving the space utilization of the cabinet body 200.

[0220] In combination with FIGS. 1, 2, 3 and 10, the second aspect of the present application provides an assembling method of an energy storage device, which is used for assembling the energy storage device 1000 of any of the above embodiments. The energy storage device 1000 comprises a cabinet body 200, and the inside of the cabinet body 200 forms an accommodating cavity. The assembling method of the energy storage device comprises the following steps:

[0221] A plurality of battery modules 310 are arranged, and any of the battery modules 310 comprises a plurality of battery monomers 100 connected in sequence;

[0222] The plurality of battery modules 310 are arranged one by one above the plurality of trays 400, and any of the battery modules 310 is connected with the tray 400 through the battery monomer 100;

[0223] The plurality of connected battery modules 310 and the tray 400 are arranged in the cabinet body 200, and the tray 400 is connected with the cabinet body 200.

[0224] Specifically, the plurality of battery monomers 100 can be connected in sequence and form the battery module 310 outside the cabinet body 200. Any of the battery monomers 100 comprises a first wall 11 with the largest area, and the first wall 11 is arranged towards the top wall of the cabinet body 200. The plurality of battery monomers 100 are arranged in sequence along the vertical direction and connected, such as bonded, through the first wall 11, thereby forming the battery module 310.

[0225] The plurality of battery modules 310 are formed by the above method, and the plurality of trays 400 consistent in number with the plurality of battery modules 310 are arranged. The plurality of battery modules 310 are arranged one by one above the plurality of trays 400 outside the cabinet 200, and the lowermost battery cell 100 of each battery module 310 is connected, such as bonded, to the tray 400, thereby forming an overall structure. Then, the plurality of battery modules 310 and the plurality of trays 400 of the overall structure are placed in the accommodating cavity of the cabinet 200 and arranged at intervals along the length direction of the accommodating cavity. The battery module 310 and the tray 400 of the overall structure are connected to the cabinet 200 through the tray 400, thereby fixing the battery module 310 in the accommodating cavity of the cabinet 200. Finally, at least two battery modules 310 of the plurality of battery modules 310 are formed into a group, and the at least two battery modules 310 in the group are connected in series, thereby forming a battery cluster 300.

[0226] According to the assembling method of the energy storage device, the plurality of battery cells 100 are connected and formed into the battery module 310, and at least one battery cell 100 is directly connected to the tray 400, without the need to arrange a frame structure for assembling the plurality of battery cells 100 into the battery module 310, thereby reducing the occupied space of the frame structure in the cabinet 200, and improving the space occupancy rate of the battery module 310 in the cabinet 200, and improving the internal space utilization rate of the cabinet 200. At the same time, the battery module 310 and the tray 400 are connected into an overall structure and arranged in the cabinet 200, and the battery module 310 and the cabinet 200 are connected through the tray 400, thereby facilitating the assembly of the battery module 310 and the cabinet 200.

[0227] In combination with FIGS. 1, 2 and 3, in some embodiments of the present application, the energy storage device 1000 further comprises a bracket 800 arranged in the accommodating cavity and connected to the side wall of the accommodating cavity. The assembling method of the energy storage device further comprises the following steps:

[0228] The plurality of connected battery modules 310 and the plurality of trays 400 are arranged in the cabinet 200, and a part of the plurality of trays 400 are connected to the bottom wall of the accommodating cavity, and another part of the plurality of trays 400 are arranged above the bracket 800 and connected to the bracket 800. The tray 400 and the bracket 800 are used together to divide the accommodating cavity into a plurality of chambers along the vertical direction.

[0229] Specifically, the accommodating cavity is provided with a bracket 800, the bracket 800 is arranged between the top wall and the bottom wall of the cabinet body 200 in the vertical direction, and is connected with the side wall of the cabinet body 200. The battery module 310 connected outside the cabinet body 200 and the tray 400 are placed in the accommodating cavity, wherein a part of the trays 400 are connected with the bottom wall of the accommodating cavity, and another part of the trays 400 are arranged above the bracket 800 and are connected with the bracket 800, so that the trays 400 and the bracket 800 are used together to divide the accommodating cavity into a plurality of chambers in the vertical direction, and each chamber is respectively provided with a battery module 310.

[0230] The tray 400 is connected with the bracket 800 and is used to divide the accommodating cavity into a plurality of chambers in the vertical direction, so as to facilitate the arrangement of a plurality of battery modules 310 in the cabinet body 200 in the vertical direction, thereby facilitating the improvement of the space utilization rate in the vertical direction of the cabinet body 200, and facilitating the arrangement of a plurality of battery modules 310 in the cabinet body 200. The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the contents of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below.

[0231] In combination with FIGS. 1-5, in some embodiments of the present application, the energy storage device 1000 is a 20-foot container. The energy storage device 1000 includes a cabinet body 200, a plurality of battery modules 310 and a plurality of trays 400. The interior of the cabinet body 200 forms an accommodating cavity, a plurality of battery modules 310 are arranged in the accommodating cavity, and each battery module 310 includes a plurality of battery monomers 100 connected in sequence. A plurality of trays 400 are arranged in the accommodating cavity, wherein the plurality of battery modules 310 are arranged above the trays 400, and at least one battery monomer 100 in the same battery module 310 is connected with the tray 400.

[0232] In combination with FIGS. 1-5, the plurality of battery cells 100 in the battery module 310 are arranged in a vertical direction and connected in sequence, the battery cell 100 includes a first wall 11 with the largest area, the first wall 11 faces the top wall of the cabinet 200, and the battery cell 100 at the lowermost of the plurality of battery cells 100 is connected with the tray 400. The battery cell 100 includes an outer shell 10 and an electrode terminal provided on the outer shell 10, the outer shell 10 has a length dimension L1, a width dimension W1, and a height dimension H1, wherein H1 < W1 ≤ L1, the length direction and the width direction of the outer shell 10 extend along the horizontal direction respectively, and the height direction of the outer shell 10 extends along the vertical direction. The accommodating cavity has a length dimension L2, a width dimension W2, and a height dimension H2, wherein L1 < W2 < L2, the length direction of the outer shell 10 is consistent with the width direction of the accommodating cavity, the width direction of the outer shell 10 is consistent with the length direction of the accommodating cavity, and the height direction of the outer shell 10 is consistent with the height direction of the accommodating cavity.

[0233] In combination with FIGS. 1-5, along the length direction of the accommodating cavity, the number of battery modules 310 is n, wherein 0.8 ≤ n * W1 / L2 < 1, n is a positive integer greater than or equal to 2. Along the width direction of the accommodating cavity, the number of battery modules 310 is s, wherein 0.8 ≤ s * L1 / W2 < 1, s is a positive integer greater than or equal to 1. One side of the width direction of the accommodating cavity is provided with a plug-in interface, and the battery module 310 is plugged into the inside of the cabinet 200 through the plug-in interface. The energy storage device 1000 further includes a door body 700, the door body 700 is connected with the cabinet 200, and the door body 700 is configured to open or close the plug-in interface.

[0234] In combination with FIGS. 3-5, the outer shell 10 is a prismatic outer shell made of metal material, 2000 mm ≤ L1 ≤ 2300 mm, L1 / W1 ≤ 3.7, 7 mm ≤ H1 ≤ 30 mm, 210 ≤ L1 / H1 ≤ 320. The electrode terminal includes a first electrode terminal 21 and a second electrode terminal 22 with opposite polarities, the first electrode terminal 21 and the second electrode terminal 22 are respectively provided on both sides of the width direction of the outer shell 10, the first electrode terminal 21 of one of the two adjacent battery cells 100 in the battery module 310 and the second electrode terminal 22 of the other are provided on the same side and connected through a conductive piece 320. The battery module 310 further includes a heat exchange plate 330 provided on one side of the width direction of the outer shell 10 and used for heat exchange with the battery cell 100. The battery cell 100 further includes a sampling assembly 40 provided on one side of the length direction of the outer shell 10 and used for collecting the voltage and temperature of the battery cell 100.

[0235] As shown in FIGS. 1-3, along the length direction of the accommodating cavity, the interior of the accommodating cavity is provided with at least one partition 210, which divides the accommodating cavity into multiple cavities along the length direction, and each cavity is provided with multiple battery modules 310, and the multiple battery modules 310 in the same cavity are connected in series to form a battery cluster 300. The energy storage device 1000 further comprises a fixing plate 600 arranged above the battery cluster 300, and the uppermost battery cell 100 of each of the multiple battery modules 310 in the same battery cluster 300 is connected to the fixing plate 600. The energy storage device 1000 further comprises a support 500 arranged in the accommodating cavity and connected to the inner wall of the accommodating cavity, and the two adjacent battery modules 310 in the same battery cluster 300 are connected through the support 500. Along the length direction of the accommodating cavity, the number of battery modules 310 is 8, and the 8 battery modules 310 form 4 battery clusters 300, and each battery cluster 300 comprises two battery modules 310 connected in series, and along the width direction of the accommodating cavity, the number of battery modules 310 is 1.

[0236] 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. In particular, 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, wherein, The energy storage device comprises: a cabinet body, an accommodating cavity being formed in the interior of the cabinet body; a plurality of battery modules, the plurality of battery modules being arranged in the accommodating cavity, and each of the battery modules comprising a plurality of battery cells connected in sequence; a plurality of trays, the plurality of trays being arranged in the accommodating cavity and connected to the cabinet body; wherein the plurality of battery modules are arranged above the plurality of trays, and at least one battery cell in the same battery module is connected to the tray.

2. The energy storage device of claim 1, wherein, The plurality of battery cells are arranged in a vertical direction, and each battery cell comprises a first wall with the largest area, the first wall being directed to a top wall of the cabinet body.

3. The energy storage device of claim 2, wherein, The plurality of battery cells in the battery module are connected in sequence, and a lowermost battery cell in the plurality of battery cells is connected to the tray.

4. The energy storage device of any one of claims 1-3, wherein, The battery cell comprises an outer shell and an electrode terminal arranged on the outer shell, the outer shell having a length dimension L1, a width dimension W1 and a height dimension H1, wherein H1 5. The energy storage device of claim 4, wherein, The accommodating cavity has a length dimension L2, a width dimension W2 and a height dimension H2, wherein L1 6. The energy storage device of claim 5, wherein, Along the length direction of the accommodating cavity, the number of the battery modules is n, and 0.8 7. The energy storage device of claim 5 or 6, wherein, Along the width direction of the accommodating cavity, the number of the battery modules is s, wherein 0.8 8. The energy storage device of any one of claims 5-7, wherein, One side of the width direction of the accommodating cavity is provided with a plug-in interface, and the battery module is plugged into the interior of the cabinet body through the plug-in interface.

9. The energy storage device of claim 8, wherein, The energy storage device further comprises a door body connected to the cabinet body, and the door body is configured to open or close the plug-in interface.

10. The energy storage device of any one of claims 4-9, wherein, The outer shell is a prismatic shell made of metal, 2000mm 11. The energy storage device of claim 10, wherein, 7mm 12. The energy storage device of claim 10 or 11, wherein, 70 13. The energy storage device of claim 12, wherein, 210 14. The energy storage device of any one of claims 4-13, wherein, The electrode terminal comprises a first electrode terminal and a second electrode terminal with opposite polarities, the first electrode terminal and the second electrode terminal being arranged on both sides of the width direction of the outer shell, the first electrode terminal of one of the adjacent two battery cells in the battery module and the second electrode terminal of the other battery cell are arranged on the same side and connected through a conductive member.

15. The energy storage device of any one of claims 4-14, wherein, The battery module further comprises a heat exchange plate arranged on one side of the length direction or the width direction of the outer shell and used for heat exchange with the battery cell.

16. The energy storage device of any one of claims 4-15, wherein, The battery cell further comprises a sampling assembly arranged on one side of the length direction or the width direction of the outer shell and used for collecting the voltage and temperature of the battery cell.

17. The energy storage device of any one of claims 1-16, wherein, The energy storage device is a 20-foot container.

18. The energy storage device of any one of claims 1-17, wherein, The receiving cavity has a length dimension L2, a width dimension W2, and a height dimension H2, wherein W2 < L2. Along the length direction of the receiving cavity, the receiving cavity is provided with at least one partition, which divides the receiving cavity into multiple cavities along the length direction. Multiple battery modules are provided in any one of the cavities, and the multiple battery modules in the same cavity are connected in series to form a battery cluster.

19. The energy storage device of any one of claims 1-18, wherein, The energy storage device also includes a fixing plate, which is disposed above the battery module, and at least two adjacent battery modules are respectively connected to the fixing plate.

20. The energy storage device of any one of claims 1-19, wherein, The energy storage device also includes a support frame, which is disposed in the receiving cavity and connected to the inner wall of the receiving cavity, and at least two adjacent trays are connected through the support frame.

21. The energy storage device of any one of claims 5-20, wherein, Along the length of the cavity, there are 8 battery modules, which form 4 battery clusters. Each battery cluster includes two battery modules connected in series. Along the width of the cavity, there is 1 battery module.

22. The energy storage device of any one of claims 1-21, wherein, The energy storage device also includes a bracket, which is disposed in the receiving cavity and connected to the inner wall of the receiving cavity. A number of the trays are connected to the bracket and together serve to divide the receiving cavity into multiple chambers in the vertical direction. The battery module is disposed in each chamber.

23. The energy storage device of any one of claims 1-22, wherein, The energy storage device also includes a control cabinet, a power distribution cabinet, and a combiner cabinet. The control cabinet, the power distribution cabinet, and the combiner cabinet are respectively located outside the cabinet and are electrically connected to the battery module.

24. A method of assembling an energy storage device, wherein, For assembling the energy storage device according to any one of claims 1 to 23, the energy storage device includes a cabinet, the interior of which is formed with a receiving cavity, and the assembly method of the energy storage device includes the following steps: Multiple battery modules are set up, and each battery module includes multiple battery cells connected in sequence. Multiple battery modules are placed one-to-one on top of multiple trays, with each battery module connected to a tray via a single battery cell. Multiple connected battery modules and trays are placed inside the cabinet, and the trays are connected to the cabinet.

25. The method of assembling an energy storage device of claim 24, wherein, The energy storage device further includes a bracket, which is disposed in the receiving cavity and connected to the side wall of the receiving cavity. The assembly method of the energy storage device further includes the following steps: Multiple connected battery modules and trays are placed inside the cabinet, and some of the trays are connected to the bottom wall of the receiving cavity. Another number of trays are placed above the bracket and connected to the bracket. The trays and brackets are used together to divide the receiving cavity into multiple chambers in the vertical direction.

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