Energy storage device and method for assembling energy storage device

Abstract

The invention relates to an energy storage device and an assembling method of the energy storage device. The energy storage device comprises a cabinet body, a plurality of battery modules and a plurality of trays, a containing cavity is formed in the cabinet body, the plurality of battery modules are arranged in the containing cavity, any battery module comprises a plurality of single batteries which are sequentially connected, the plurality of trays are arranged in the containing cavity and connected to the cabinet body, the plurality of battery modules are correspondingly arranged above the plurality of trays, and at least one battery monomer in the same battery module is connected with the trays. According to the energy storage device, the plurality of battery monomers are sequentially connected to form the battery module, and at least one battery monomer is directly connected with the tray, so that the battery module can be fixed in the cabinet body, and a frame structure for assembling the plurality of battery monomers into the battery module does not need to be arranged; therefore, the space occupied by the frame structure in the cabinet body is reduced, and the space occupancy rate of the battery module in the cabinet body is further improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an energy storage device and a method for assembling the energy storage device. Background Technology

[0002] Currently, with the continuous growth of global energy demand and the increasing awareness of environmental protection, energy storage technology has gradually become one of the important means to solve energy problems.

[0003] Energy storage devices, as a new type of energy storage equipment, have advantages such as portability, flexibility, and high efficiency, and are widely used in power systems, transportation, aerospace, and other fields. Battery modules, as the core component of energy storage devices, directly affect the efficiency and economy of the energy storage system.

[0004] In related technologies, multiple battery cells are surrounded by a frame structure and connected to form a battery module. The presence of the frame structure occupies internal space in the energy storage device, reducing the usable space of the battery module and lowering the internal space utilization rate of the energy storage device. Summary of the Invention

[0005] In view of the deficiencies of the existing technology, the purpose of this application is to provide an energy storage device and an assembly method for the energy storage device, which can effectively solve the problem of low internal space utilization of the energy storage device.

[0006] The first aspect of this application discloses an energy storage device, which includes:

[0007] The cabinet has an internal cavity for receiving contents.

[0008] Multiple battery modules are disposed in a receiving cavity, and each battery module includes multiple battery cells connected in sequence.

[0009] Multiple trays are placed in the receiving cavity and connected to the cabinet;

[0010] In this configuration, multiple battery modules are positioned above multiple trays, and at least one battery cell in the same battery module is connected to the tray.

[0011] According to the energy storage device of this application, by sequentially connecting multiple battery cells to form a battery module, and directly connecting at least one of the battery cells to a tray, the battery module can be fixed inside the cabinet without the need for a frame structure for assembling multiple battery cells into a battery module. This reduces the space occupied by the frame structure inside the cabinet, thereby increasing the space utilization rate of the battery module inside the cabinet and improving the internal space utilization rate of the cabinet.

[0012] In some embodiments of this application, multiple battery cells are arranged vertically, and each battery cell includes a first wall with the largest area, which faces the top wall of the cabinet.

[0013] By arranging multiple battery cells vertically and setting the first wall towards the top wall of the cabinet, the size occupied by the battery cells in the vertical direction can be effectively reduced, that is, the size occupied by the battery module in the vertical direction can be reduced, thus making it easier to set a larger number of battery cells in the vertical direction inside the cabinet.

[0014] In some embodiments of this application, multiple battery cells in the battery module are connected in sequence, and the bottommost battery cell among the multiple battery cells is connected to the tray.

[0015] By directly connecting the bottom battery cell to the tray, there is no need to set up a frame structure in the battery module, thereby reducing the space occupied by the frame structure in the cabinet, thus improving the space utilization rate of the battery module in the cabinet and improving the internal space utilization rate of the cabinet.

[0016] In some embodiments of this application, the battery cell includes a housing and electrode terminals disposed on the housing. The housing has a length dimension L1, a width dimension W1, and a height dimension H1, wherein H1 < W1 ≤ L1. The length and width directions of the housing extend horizontally, and the height direction of the housing extends vertically.

[0017] By extending the height of the casing vertically and connecting multiple battery cells sequentially in the vertical direction, the size occupied by each battery cell in the vertical direction can be effectively reduced, thus reducing the size occupied by the battery module in the vertical direction. This makes it easier to install a larger number of battery cells in the vertical direction within the cabinet.

[0018] In some embodiments of this application, the receiving 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 is consistent with the width direction of the receiving cavity, the width direction of the outer shell is consistent with the length direction of the receiving cavity, and the height direction of the outer shell is consistent with the height direction of the receiving cavity.

[0019] By aligning the length of the outer casing with the width of the cavity, the number of individual battery cells along the width of the cavity can be reduced, thus reducing the number of battery modules along the width of the cavity, facilitating the assembly of the battery modules within the cavity. Conversely, aligning the width of the battery body with the length of the cavity increases the number of individual battery cells along the length of the cavity, thus increasing the number of battery modules along the length of the cavity, thereby improving the energy storage efficiency of the energy storage device.

[0020] In some embodiments of this application, the number of battery modules along the length of the receiving cavity is n, and 0.8≤n*W1 / L2<1, where n is a positive integer greater than or equal to 2.

[0021] By setting 0.8≤n*W1 / L2<1, the number of battery modules can be increased without exceeding the length of the cabinet's internal storage cavity, thereby improving the space utilization within the cabinet.

[0022] In some embodiments of this application, the number of battery modules along the width direction of the cavity is s, where 0.8≤s*L1 / W2<1, and s is a positive integer greater than or equal to 1.

[0023] By setting 0.8≤s*L1 / W2<1, the number of battery modules can be increased without exceeding the width of the cabinet's internal cavity, thereby improving the space utilization within the cabinet.

[0024] In some embodiments of this application, an insertion interface is provided on one side of the cavity in the width direction, and the battery module is inserted into the interior of the housing through the insertion interface.

[0025] By providing an insertion interface on one side of the cavity in the width direction, the battery module can be inserted into the cabinet through the insertion interface along the width direction of the cavity, making it easy to assemble the battery module into the cabinet.

[0026] In some embodiments of this application, the energy storage device further includes a door connected to the housing, the door being configured to open or close the interface.

[0027] By setting up a door, when it is necessary to repair or replace one or more battery modules, the door can be opened to allow for repair or replacement of the battery modules through the interface.

[0028] In some embodiments of this application, the outer shell is a prismatic outer shell made of metal, with 2000mm≤L1≤2300mm and 1≤L1 / W1≤3.7.

[0029] By setting the length L1 of the casing to 2000mm≤L1≤2300mm and the L1 / W1 ratio to 1≤L1 / W1≤3.7, the length and width of the casing can be increased, thereby improving the space utilization and energy storage efficiency of the battery cells. Simultaneously, using a prismatic casing made of metal effectively increases the surface area of ​​the battery cells and enhances their heat dissipation capabilities.

[0030] In some embodiments of this application, 7mm≤H1≤30mm.

[0031] Setting the height dimension H1 of the casing to 7mm≤H1≤30mm allows for a reduction in the casing height without exceeding the overcurrent limit of the battery cell, thereby increasing the length and width of the casing and ultimately improving the heat dissipation of the battery cell.

[0032] In some embodiments of this application, 70 ≤ L1 / H1 ≤ 320.

[0033] By setting the length and height of the casing according to the above proportions, the length of the casing can be increased without exceeding the overcurrent limit of the battery cell, thereby improving the heat dissipation effect of the battery cell.

[0034] In some embodiments of this application, 210≤L1 / H1≤320.

[0035] By setting the length and height of the casing according to the above proportions, the length of the casing can be increased without exceeding the overcurrent limit of the battery cell, thereby improving the heat dissipation effect of the battery cell.

[0036] In some embodiments of this application, the electrode terminals include a first electrode terminal and a second electrode terminal with opposite polarities. The first electrode terminal and the second electrode terminal are respectively disposed on both sides of the width direction of the housing. The first electrode terminal of one of two adjacent battery cells in the battery module and the second electrode terminal of the other are disposed on the same side and connected by a conductive element.

[0037] By placing the first electrode terminal of one of two adjacent battery cells in a battery module on the same side and connecting them through a conductive element, multiple battery cells in the battery module can be connected in series, thereby increasing the battery module's capacity.

[0038] In some embodiments of this application, the battery module further includes a heat exchange plate, which is disposed on one side of the housing in the length or width direction and is used for heat exchange with the battery cells.

[0039] By exchanging heat between the heat exchange plate and the battery cell, the temperature of the battery cell can be regulated by the heat exchange plate, thereby improving the heat dissipation effect of the battery cell.

[0040] In some embodiments of this application, the battery cell further includes a sampling component, which is located on one side of the casing in the length or width direction and is used to collect the voltage and temperature of the battery cell.

[0041] By collecting the voltage and temperature of individual battery cells using sampling components, the working status of individual battery cells can be monitored, thereby improving the working reliability of individual battery cells and battery modules.

[0042] In some embodiments of this application, the energy storage device is a 20-foot container.

[0043] The 20-foot container is standard, which facilitates the arrangement of battery modules inside the container.

[0044] In some embodiments of this application, 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 interior of the receiving cavity is provided with at least one partition member, which divides the receiving cavity into multiple cavities along the length direction. Multiple battery modules are provided in any one cavity, and the multiple battery modules in the same cavity are connected in series to form a battery cluster.

[0045] By setting up separators and dividing the housing into multiple cavities, the battery clusters located in different cavities can reduce mutual interference during operation, thereby improving the reliability of the energy storage device.

[0046] In some embodiments of this application, the energy storage device further includes a fixing plate, which is disposed above the battery modules, and at least two adjacent battery modules are respectively connected to the fixing plate.

[0047] By connecting the tops of two adjacent battery modules to a fixing plate, the tops of the two adjacent battery modules can be fixed through the fixing plate, thereby improving the connection reliability of the two adjacent battery modules and improving the fixing effect of the battery modules.

[0048] In some embodiments of this application, the energy storage device further includes a support, 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 by the support.

[0049] By connecting two adjacent trays to a bracket, the bracket can fix the bottom of the two adjacent trays, thereby improving the connection reliability of the two adjacent trays and thus improving the fixing effect of the battery module on the tray.

[0050] In some embodiments of this application, the number of battery modules along the length of the cavity is 8, and the 8 battery modules form 4 battery clusters. Each battery cluster includes two battery modules connected in series. The number of battery modules along the width of the cavity is 1.

[0051] By setting eight battery modules along the length of the cavity and one battery module along the width of the cavity, the number of battery modules can be increased without exceeding the cavity inside the cabinet, thereby improving the space utilization rate inside the cabinet.

[0052] In some embodiments of this application, the energy storage device further includes a bracket disposed in the receiving cavity and connected to the inner wall of the receiving cavity. A number of trays are connected to the bracket and together serve to divide the receiving cavity into multiple chambers in the vertical direction, and battery modules are disposed in the chambers.

[0053] The tray is connected to the bracket and is used to divide the receiving cavity into multiple chambers in the vertical direction, which facilitates the installation of multiple battery modules in the cabinet in the vertical direction, thereby improving the space utilization rate in the vertical direction of the cabinet and facilitating the distribution of various battery modules in the cabinet.

[0054] In some embodiments of this application, the energy storage device further includes a control cabinet, a power distribution cabinet, and a combiner cabinet, which are respectively located outside the enclosure and electrically connected to the battery module.

[0055] By placing the control cabinet, power distribution cabinet, and combiner cabinet on the outside of the enclosure, the internal space occupied by the control cabinet, power distribution cabinet, and combiner cabinet is reduced, allowing for the installation of more battery modules inside the enclosure, thereby improving the space utilization rate inside the enclosure.

[0056] The second aspect of this application provides a method for assembling an energy storage device, for assembling any of the above-mentioned energy storage devices. The energy storage device includes a cabinet, the interior of which is formed with a receiving cavity. The method for assembling the energy storage device includes the following steps:

[0057] Multiple battery modules are set up, and each battery module includes multiple battery cells connected in sequence.

[0058] 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.

[0059] Multiple connected battery modules and trays are placed inside the cabinet, and the trays are connected to the cabinet.

[0060] According to the energy storage device assembly method of this application, by sequentially connecting multiple battery cells to form a battery module, and directly connecting at least one battery cell to a tray, there is no need to set up a frame structure for assembling multiple battery cells into a battery module. This reduces the space occupied by the frame structure in the cabinet, thereby improving the space utilization rate of the battery module in the cabinet and increasing the internal space utilization rate of the cabinet. At the same time, after connecting the battery module and the tray into a whole, they are placed together inside the cabinet and connected to the cabinet through the tray, which facilitates the assembly of the battery module and the cabinet.

[0061] In some embodiments of this application, 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:

[0062] 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.

[0063] The tray is connected to the bracket and is used to divide the receiving cavity into multiple chambers in the vertical direction, which facilitates the installation of multiple battery modules in the cabinet in the vertical direction, thereby improving the space utilization rate in the vertical direction of the cabinet and facilitating the distribution of various battery modules in the cabinet.

[0064] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0065] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0066] Figure 1 This is a front view of an energy storage device provided in one embodiment of this application;

[0067] Figure 2 This is a top view of an energy storage device provided in one embodiment of this application;

[0068] Figure 3 This is a schematic diagram of the structure of a battery module provided in one embodiment of this application;

[0069] Figure 4 This is an isometric view of a battery cell provided in one embodiment of this application;

[0070] Figure 5 This is a top view of a battery cell provided in one embodiment of this application;

[0071] Figure 6 This is a top view of a battery cell provided in another embodiment of this application;

[0072] Figure 7 This is a top view of a battery cell provided in another embodiment of this application;

[0073] Figure 8 This is a top view of a battery cell provided in another embodiment of this application;

[0074] Figure 9 This is a partial structural schematic diagram of an energy storage device provided in another embodiment of this application;

[0075] Figure 10 This is a flowchart of an assembly method for an energy storage device provided in one embodiment of this application.

[0076] The reference numerals in the detailed embodiments are as follows:

[0077] 100. Battery cell;

[0078] 10. Outer shell; 11. First wall;

[0079] 21. First electrode terminal; 22. Second electrode terminal;

[0080] 30. Pressure relief mechanism;

[0081] 40. Sampling component;

[0082] 200. Cabinet body; 210. Divider;

[0083] 300. Battery cluster; 310. Battery module; 320. Conductive component; 330. Heat exchange plate;

[0084] 400. Pallet;

[0085] 500, bracket;

[0086] 600. Fixing plate;

[0087] 700. Door body;

[0088] 800, bracket;

[0089] 1000. Energy storage devices;

[0090] X: Length direction of the outer shell; Y: Width direction of the outer shell; Z: Height direction of the outer shell; A: Length direction of the receiving cavity; B: Width direction of the receiving cavity; C: Height direction of the receiving cavity. Detailed Implementation

[0091] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0092] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application shall have the ordinary meaning as understood by those skilled in the art to which the embodiments of this application pertain.

[0093] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other indications of orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0094] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0095] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0096] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0097] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. Lithium-ion batteries, due to their high energy density, high average open-circuit voltage, and long cycle life, are widely used in mobile and portable electronic devices.

[0098] Energy storage devices, as a new type of energy storage equipment, have advantages such as portability, flexibility, and high efficiency, and are widely used in power systems, transportation, aerospace, and other fields. Battery modules, as the core component of energy storage devices, directly affect the efficiency and economy of the energy storage system.

[0099] In related technologies, multiple battery cells are surrounded by a frame structure and connected to form a battery module. The presence of the frame structure occupies internal space in the energy storage device, reducing the usable space of the battery module and lowering the internal space utilization rate of the energy storage device.

[0100] To address the issue of low internal space utilization in energy storage devices, this application proposes an energy storage device and its assembly method. This eliminates the need for a frame structure to assemble multiple battery cells into a battery module, thereby reducing the space occupied by the frame structure within the energy storage device and improving the space utilization rate of the battery cells within the device.

[0101] In some embodiments of this application, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0102] A battery cluster may include multiple battery modules, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0103] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application can be any power system that requires energy storage devices.

[0104] In some embodiments of this application, the energy storage device is an energy storage container or an energy storage cabinet.

[0105] Combination Figures 1 to 3As shown, in some embodiments of this application, the first aspect of this application discloses an energy storage device 1000. The energy storage device 1000 includes a cabinet 200, a plurality of battery modules 310, and a plurality of trays 400. The cabinet 200 has an internal cavity, and the plurality of battery modules 310 are disposed in the cavity. Each battery module 310 includes a plurality of battery cells 100 connected in sequence. The plurality of trays 400 are disposed in the cavity and connected to the cabinet 200. The plurality of battery modules 310 are correspondingly disposed above the trays 400, and at least one battery cell 100 in the same battery module 310 is connected to the tray 400.

[0106] Multiple battery cells in the battery module are connected in series, parallel, or mixed connections via conductive components. Specifically, the cabinet 200 has a roughly rectangular structure with an internal cavity for accommodating the battery module 310. The battery module 310 is placed in the cavity via a tray 400, and the cabinet 200 protects the battery module 310 inside. Optionally, multiple battery modules 310 can be placed together on the same tray 400, or multiple battery modules 310 can be placed one on each of multiple trays 400. The tray 400 is used to carry and support the battery module 310. The battery module 310 can be assembled with the tray 400 and placed into the cavity together, or the tray 400 can be placed in the cavity first, and then the battery module 310 can be placed in the cavity, with at least one battery cell 100 of the battery module 310 connected to the tray 400, thereby fixing the battery module 310 inside the cabinet 200. The battery module 310 can be fixedly connected to the tray 400, such as by welding or bonding, thereby improving the reliability of the connection between the battery module 310 and the tray 400. Alternatively, the battery module 310 can be detachably connected to the tray 400, such as by snap-fit ​​or by connecting parts, thereby facilitating the disassembly of the battery module 310 and the tray 400. The battery module 310 includes multiple battery cells 100 connected sequentially in the same direction. The multiple battery cells can be bonded to each other, or adjacent battery cells can each have a snap-fit ​​structure, and the two battery cells can be snapped together by the snap-fit ​​structure. The tray 400 can be connected to the end battery cells 100 located in the sequential arrangement direction among the multiple battery cells 100, or the tray 400 can be connected to one or more battery cells 100 located in the middle position in the sequential arrangement direction among m battery cells 100.

[0107] According to the energy storage device 1000 of this application, by sequentially connecting multiple battery cells 100 to form a battery module 310, and directly connecting at least one of the battery cells 100 to the tray 400, the battery module 310 can be fixed inside the cabinet 200 without the need for a frame structure for assembling multiple battery cells 100 into the battery module 310. This reduces the space occupied by the frame structure in the cabinet 200, thereby 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.

[0108] Combination Figures 1 to 5 As shown, in some embodiments of this application, a plurality of battery cells 100 are arranged in a vertical direction, and each battery cell 100 includes a first wall 11 with the largest area, which faces the top wall of the cabinet 200.

[0109] Specifically, the battery cell 100 includes multiple outer wall surfaces, among which the outer wall surface with the largest area forms the first wall 11 of the battery cell 100. The first wall 11 is positioned facing the top wall of the cabinet 200. When the cabinet 200 is placed, the top wall is generally positioned vertically at the top of the cabinet 200, that is, the first walls 11 of the multiple battery cells 100 are spaced apart vertically.

[0110] In some embodiments of this application, the multiple battery cells 100 may be arranged horizontally, with the first wall 11 facing the side wall of the cabinet 200. Optionally, the first wall 11 may be arranged parallel to the vertical direction, so that the first walls 11 of the multiple battery cells 100 are spaced apart horizontally. The tray 400 is located below the battery module 310 and may be connected to one or more battery cells 100.

[0111] By arranging multiple battery cells 100 vertically and setting the first wall 11 toward the top wall of the cabinet 200, the size occupied by the battery cells 100 in the vertical direction can be effectively reduced, that is, the size occupied by the battery module 310 in the vertical direction can be reduced, thereby facilitating the installation of a larger number of battery cells 100 in the vertical direction within the cabinet 200.

[0112] Combination Figures 1 to 5 As shown, in some embodiments of this application, a plurality of battery cells 100 in the battery module 310 are connected in sequence, and the battery cell 100 located at the bottom of the plurality of battery cells 100 is connected to the tray 400.

[0113] Specifically, multiple battery cells 100 are arranged vertically in sequence and can be connected to each other via the first wall 11, either by adhesive bonding or by snap-fitting. The lowest battery cell 100 is connected to the tray 400. Optionally, the battery cell 100 can be connected to the tray 400 via the first wall 11, either by adhesive bonding, snap-fitting, or bolting.

[0114] By directly connecting the bottom battery cell 100 to the tray 400, there is no need to include a frame structure in the battery module 310, thus reducing the space occupied by the frame structure within the cabinet 200. This improves the space utilization rate of the battery module 310 within the cabinet 200 and enhances the internal space utilization of the cabinet 200. Figures 1 to 5 As shown, in some embodiments of this application, the battery cell 100 includes a housing 10 and electrode terminals disposed on the housing 10. The housing 10 has a length dimension L1, a width dimension W1 and a height dimension H1, wherein H1 < W1 ≤ L1. The length direction and width direction of the housing 10 extend horizontally, and the height direction of the housing 10 extends vertically.

[0115] Specifically, the battery cell 100 includes a casing 10 and electrode terminals protruding from the casing 10. The casing 10 can be a strip-shaped or block-shaped structure, and has a length dimension L1, a width dimension W1, and a height dimension H1, wherein H1 < W1 ≤ L1. An electrode assembly is formed inside the casing 10; the electrode assembly is the component in the battery cell 10 where the electrochemical reaction occurs. The casing 10 may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab (not shown in the figure). The positive and negative tabs can be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging process of the battery cell 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop. The outer shell 10 forms the overall appearance structure of the outer shell 10. It can be a heat-conducting component made of metal. In addition to having good thermal conductivity, the metal outer shell also has sufficient structural strength, making the outer shell 10 less prone to deformation when subjected to compression and impact, thereby improving the safety performance of the outer shell 10. Optionally, the material of the outer shell 10 can be steel, iron, aluminum, aluminum alloy, etc.

[0116] In some embodiments of this application, the length direction of the outer casing 10 is the same as the length direction of the battery module 310, the width direction of the outer casing 10 is the same as the width direction of the battery module 310, and the height direction of the outer casing 10 is the same as the height direction of the battery module 310. The length direction X and the width direction Y of the outer casing extend horizontally, and the height direction Z of the outer casing extends vertically. Multiple battery cells 100 are sequentially bonded vertically, meaning that multiple battery cells 100 are connected sequentially through the large surface of the outer casing 10, specifically by bonding, thereby improving the connection reliability between the multiple battery cells 100. Simultaneously, the lowest battery cell 100 among the multiple battery cells 100 is connected to the tray 400 through the first wall 11, specifically by bonding, thereby improving the connection reliability between the battery module 310 and the tray 400.

[0117] By extending the height of the outer casing 10 vertically and connecting multiple battery cells 100 sequentially in the vertical direction, the size occupied by the battery cells 100 in the vertical direction can be effectively reduced, that is, the size occupied by the battery module 310 in the vertical direction can be reduced, thereby facilitating the installation of a larger number of battery cells 100 in the vertical direction within the cabinet 200.

[0118] Combination Figures 1 to 5 As shown, in some embodiments of this application, the receiving 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 receiving cavity, the width direction of the outer shell 10 is consistent with the length direction of the receiving cavity, and the height direction of the outer shell 10 is consistent with the height direction of the receiving cavity.

[0119] Specifically, the length direction A of the receiving cavity is the length direction of the cabinet 200, the width direction B of the receiving cavity is the width direction of the cabinet 200, and the height direction C of the receiving cavity is the height direction of the cabinet 200. The length direction A and the width direction B of the receiving cavity extend horizontally, and the length direction X of the outer shell is consistent with the width direction B of the receiving cavity, while the width direction Y of the outer shell is consistent with the length direction A of the receiving cavity. The height direction C of the receiving cavity extends vertically and is consistent with the height direction Z of the outer shell.

[0120] By aligning the length of the outer casing 10 with the width of the receiving cavity, the number of individual battery cells 100 along the width of the receiving cavity can be reduced, thus reducing the number of battery modules 310 along the width of the receiving cavity, thereby facilitating the assembly of the battery modules 310 within the cavity. Conversely, aligning the width of the outer casing 10 with the length of the receiving cavity increases the number of individual battery cells 100 along the length of the receiving cavity, thus increasing the number of battery modules 310 along the length of the receiving cavity, thereby improving the energy storage efficiency of the energy storage device 1000.

[0121] Combination Figures 1 to 5 As shown, in some embodiments of this application, the number of battery modules 310 along the length of the receiving cavity is n, and 0.8≤n*W1 / L2<1, where n is a positive integer greater than or equal to 2.

[0122] Specifically, n*W1 represents the sum of the width dimensions of n battery modules 310. n*W1 / L2 can be any value between 0.8…0.85…0.95…1, including 0.8 but excluding 1.

[0123] By setting 0.8≤n*W1 / L2<1, the number of battery modules 310 can be increased without exceeding the length of the accommodating cavity inside the cabinet 200, thereby improving the space utilization rate inside the cabinet 200.

[0124] Combination Figures 1 to 5 As shown, in some embodiments of this application, the number of battery modules along the width direction of the cavity is s, where 0.8≤s*L1 / W2<1, and s is a positive integer greater than or equal to 1.

[0125] Specifically, s*L1 represents the sum of the lengths of s battery modules 310. s*L1 / W2 can be any value between 0.8…0.85…0.95…1, including 0.8 but excluding 1.

[0126] By setting the proportions as described above, the number of battery modules 310 can be increased without exceeding the width of the accommodating cavity within the cabinet 200, thereby improving the space utilization rate within the cabinet 200.

[0127] Combination Figures 1 to 5 As shown, in some embodiments of this application, n battery modules 310 arranged along the length direction of the receiving cavity form at least one battery cluster 300. The battery cluster 300 includes at least 2t battery modules 310 arranged at intervals and connected in series along the length direction of the receiving cavity. Each battery module 310 includes m battery cells 100. The voltage of the battery cluster 300 is U, and the voltage of the battery cell 100 is v, where m = U / v / 2t, and t is a positive integer greater than or equal to 1.

[0128] Specifically, the battery cluster 300 includes at least two battery modules 310 arranged along the length of the receiving cavity, and the at least two battery modules 310 are connected in series to form the battery cluster 300. To facilitate wiring between the battery modules 310 within the same battery cluster 300, the number of battery modules 310 in the battery cluster 300 is set to 2t, i.e., an even number, so that when a wire enters from below one battery module 310, it can exit from below the other battery module 310. Alternatively, when a wire enters from above one battery module 310, it can exit from above the other battery module 310.

[0129] By setting the number of battery modules 310 within the battery cluster 300 to 2t (an even number), wiring between battery modules 310 within the same battery cluster 300 is facilitated. Furthermore, using the formula m = U / v / 2t, the number of battery modules 310 within the battery cluster 300 can be calculated when the voltage U of the battery cluster 300, the voltage v of the individual battery cell 100, and the number of individual battery cells 100 within a single battery module 310 are known. Alternatively, the number of individual battery cells 100 within a single battery module 310 can be calculated when the voltage U of the battery cluster 300, the voltage v of the individual battery cell 100, and the number of battery modules 310 within the battery cluster 300 are known.

[0130] For ease of description, this application only uses a lithium iron phosphate battery cell 100 and a 20-foot container as an example for the energy storage device 1000. The outer casing 10 has a length L1 = 2200 mm and a width W1 = 630 mm. The voltage U of the battery cluster 300 ranges from 1000V to 2500V, and the upper limit voltage of the battery cell 100 is 3.65V. The maximum length of the internal cavity of the cabinet 200 is L2 = 5746 mm, the maximum width W2 = 2250 mm, and the maximum height H2 = 2452 mm.

[0131] Optionally, when the battery cluster 300 includes two battery modules 310 connected in series, and the voltage U of the battery cluster 300 is 1500V, then t=1, m=U / v / 2t=1500 / 3.65 / 2=205, meaning the number of individual battery cells in a single battery module 310 is 205. In this case, to ensure that the height of a single battery module 205 is less than the height H2 of the receiving cavity, the height H1 of the outer casing 10 can be 10.5mm.

[0132] 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, then t = 2, m = U / v / 2t = 2300 / 3.65 / 4 = 158, meaning that the number of battery cells 100 in a single battery module 310 is 158. In this case, to ensure that the height of a single battery module 310 is less than the height H2 of the receiving cavity, the height H1 of the outer casing 10 can be 14.1mm.

[0133] Combination Figures 1 to 3 As shown, in some embodiments of this application, an insertion interface is provided on one side of the accommodating cavity in the width direction, and the battery module 310 is inserted into the interior of the cabinet 200 through the insertion interface.

[0134] Specifically, an insertion interface is formed on the side where the length direction A and the height direction C of the cavity are located, and the battery module 310 is inserted into the interior of the cabinet 200 along the width direction B of the cavity.

[0135] By providing an insertion interface on one side of the receiving cavity in the width direction, the battery module 310 can be inserted into the interior of the cabinet 200 through the insertion interface in the width direction of the receiving cavity, which facilitates the assembly of the battery module 310 into the cabinet 200.

[0136] Combination Figures 1 to 3 As shown, in some embodiments of this application, the energy storage device 1000 further includes a door 700, which is connected to the cabinet 200 and is configured to open or close the interface.

[0137] Specifically, the door 700 is located on the side of the receiving cavity with the insertion interface and is rotatably connected to the cabinet 200, thereby facilitating the opening or closing of the insertion interface. Alternatively, the door 700 can also be connected to the cabinet 200 by a push-pull mechanism, thereby facilitating the opening or closing of the insertion interface.

[0138] By setting up a door 700, when it is necessary to inspect or replace one or more battery modules 310, the door 700 can be opened to inspect or replace the battery module 310 through the plug-in interface.

[0139] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the outer shell 10 is a prismatic outer shell made of metal, with 2000mm≤L1≤2300mm and 1≤L1 / W1≤3.7.

[0140] Specifically, the outer shell 10 can be a cuboid or cube-shaped 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.

[0141] By setting the length L1 of the outer casing 10 to 2000mm≤L1≤2300mm and the L1 / W1 ratio to 1≤L1 / W1≤3.7, the length and width of the outer casing 10 can be increased, thereby improving the space utilization and energy storage efficiency of the battery cell 100. Simultaneously, setting the outer casing 10 as a prismatic metal casing effectively increases the surface area of ​​the battery cell 100 and enhances its heat dissipation capacity.

[0142] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, 7mm≤H1≤30mm.

[0143] Specifically, H1 can be any value between 7mm…10mm…15mm…20mm…30mm.

[0144] Setting the height dimension H1 of the outer casing 10 to 7mm≤H1≤30mm can reduce the height dimension of the outer casing 10 without exceeding the overcurrent limit of the battery cell 100, thereby increasing the length and width dimensions of the outer casing 10 and thus improving the heat dissipation effect of the battery cell 100.

[0145] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, 70≤L1 / H1≤320.

[0146] Specifically, the ratio of L1 / H1 can be any value between 70...100...150...200...300...320.

[0147] By setting the length and height of the housing 10 according to the above proportions, the length of the housing 10 can be increased without exceeding the overcurrent limit of the battery cell 100, thereby improving the heat dissipation effect of the battery cell 100.

[0148] In some embodiments of this application, 210≤L1 / H1≤320.

[0149] Specifically, the ratio of L1 / H1 can be any value between 210...250...300...320.

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

[0151] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the outer casing 10 has a volume dimension V, where V = L1 * W1 * H1, and 0.000014 / mm. 2 ≤L1 / V≤0.000265 / mm 2 .

[0152] Specifically, the outer shell 10 is a cuboid or cube, with a volume dimension V = L1 * W1 * H1. The ratio of L1 to V can be 0.000014 / mm. 2 ...0.0001 / mm 2 …0.0002 / mm 2 …0.000265 / mm 2 Any value between.

[0153] By setting the length and volume of the casing 10 according to the above proportions, the length of the casing 10 can be increased without exceeding the overcurrent limit of the battery cell 100, thereby improving the space utilization of the battery cell 100.

[0154] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the outer shell 10 has a volume dimension V, where V = L1*W1*H1, and 0.00000019 / mm2 ≤ H1 / V ≤ 0.00000093 / mm2.

[0155] Specifically, the H1 / V ratio can be 0.00000019 / mm. 2 ...0.00000050 / mm 2 …0.00000070 / mm 2 …0.00000093 / mm 2 Any value between.

[0156] By setting the height and volume of the casing 10 according to the above proportions, the height of the casing 10 can be reduced without exceeding the overcurrent limit of the battery cell 100, thereby increasing the length and width of the casing 10 and improving the heat dissipation effect of the battery cell 100.

[0157] Combination Figure 4 and Figure 5As shown, in some embodiments of this application, the outer shell 10 has a volume dimension V, where V = L1 * W1 * H1, and 0.000014 / mm2 ≤ W1 / V ≤ 0.000071 / mm2.

[0158] Specifically, the W1 / V ratio can be 0.000014 / mm. 2 ...0.000035 / mm 2 …0.000065 / mm 2 …0.000071 / mm 2 Any value between.

[0159] By setting the width and volume of the casing 10 according to the above proportions, the width of the casing 10 can be increased without exceeding the overcurrent limit of the battery cell 100, thereby improving the heat dissipation effect of the battery cell 100.

[0160] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the outer shell 10 has a surface area dimension S and a volume dimension V, wherein S = 2L1*W1 + 2L1*H1 + 2W1*H1, V = L1*W1*H1, and 0.067 / mm ≤ S / V ≤ 0.286 / mm.

[0161] Specifically, the surface area of ​​the outer casing 10 refers to the total area of ​​all its outer surfaces. The S / V ratio can be any value between 0.067 / mm…0.15 / mm…0.25 / mm…0.286 / mm.

[0162] By setting 0.067 / mm≤S / V≤0.286 / mm, the surface area of ​​the housing 10 can be increased, thereby improving the heat dissipation effect of the battery cell 100.

[0163] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the battery cell 100 has a capacity E, wherein 0.1212 mm / Ah ≤ L1 / E ≤ 1.74 mm / Ah.

[0164] Specifically, the L1 / E ratio can be any value between 0.1212 mm / Ah...0.5 mm / Ah...1.2 mm / Ah...1.74 mm / Ah.

[0165] When battery cells 100 of different lengths have the same capacity E, the smaller the ratio of L1 / E, the larger the capacity value per unit length, and the greater the capacity density. By setting the length of the casing 10 and the capacity E of the battery cell 100 according to the above ratio, the capacity density per unit length of the battery cell 100 can be effectively increased.

[0166] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, 0.1212mm / Ah≤L1 / E≤0.8mm / Ah.

[0167] Specifically, the L1 / E ratio can be any value between 0.1212 mm / Ah...0.5 mm / Ah...0.70 mm / Ah...0.8 mm / Ah.

[0168] By setting the length of the casing 10 and the capacity E of the battery cell 100 in the above ratio, the capacity density per unit length of the battery cell 100 can be increased.

[0169] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the casing 10 has a surface area dimension S, and the battery cell 100 has a capacity E, wherein S = 2L1*W1 + 2L1*H1 + 2W1*H1, 130.9 mm² 2 / Ah≤S / E≤3680mm 2 / Ah.

[0170] Specifically, the S / E ratio can be 130.9 mm. 2 / Ah...1000mm 2 / Ah…2000mm 2 / Ah…3680mm 2 Any value between / Ah.

[0171] By using 130.9mm 2 / Ah≤S / E≤3680mm 2 The / Ah setting can increase the capacity density per unit area of ​​a single battery cell by 100.

[0172] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the casing 10 has a volume dimension V, and the battery cell 100 has a capacity E, where V = L1 * W1 * H1, 3024 mm². 3 / Ah≤V / E≤55200mm 3 / Ah.

[0173] Specifically, the V / E ratio can be 3024mm. 3 / Ah…20000mm 3 / Ah…30000mm 3 / Ah…55200mm 3 Any value between / Ah.

[0174] By using 3024mm 3 / Ah≤V / E≤55200mm 3 The / Ah setting can increase the capacity density per unit volume of a single battery cell by 100.

[0175] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the energy storage device 1000 is a 20-foot container.

[0176] Specifically, a 20-foot container can be a GBT1413-2023 series 1 container. The width of container 200 is 2438mm. The length of container 200 is 6100mm. The height of container 200 can be either 2896mm or 2591mm. When the height of container 200 is 2896mm, its container type is 1CCC. When the height of container 200 is 2591mm, its container type is 1CC. The maximum length of the internal cavity of container 200 is L2 = 5746mm, the maximum width is W2 = 2250mm, and the maximum height is H2 = 2452mm.

[0177] The 20-foot container is standard, which facilitates the arrangement of the battery module 310 within the cabinet 200.

[0178] Based on the internal space layout of a 20-foot container, taking a lithium iron phosphate battery cell as an example, the dimensions of the battery cell 100 are set according to Table (I) below, which can maximize the space utilization of the internal cavity of the container 200. Here, the charge E' represents the charge of the battery cell 100.

[0179] parameter Implementation Method 1 Implementation Method 2 Implementation Method 3 Length dimension L1 (mm) 2235 2200 2128 Height dimension H1 (mm) 10.5 14.1 25.7 Width dimension W1 (mm) 646 646 627.5 Capacity E (Ah) 1875 2515 4642 Energy consumption E' (Wh) 6000 8048 14854.4 <![CDATA[Volume V (mm 3 )]]> 15160005 20038920 34317724 <![CDATA[Surface area S (mm 2 )]]> 2948121 2922657.2 2812272.7 L1 / H 212.8571429 156.0283688 82.80155642 L1 / W 3.459752322 3.405572755 3.39123506 L1 / E 1.192 0.874751491 0.458423093 L1 / S 0.00075811 0.00075274 0.000756683 L1 / V 0.00014742739 0.00010978636 0.00006200877 H1 / V 0.00000069261 0.00000070363 0.00000074888 S / V 0.19446702 0.145849038 0.081948112 S / E 491.3535 363.1532306 189.3225374 V / E 8085.336 7967.761431 7392.874623 W1 / V 0.00004261212 0.00003223727 0.00001828501

[0180] Table (1)

[0181] Combination Figures 3 to 5 As shown, in some embodiments of this application, the electrode terminals include 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 disposed on both sides of the width direction of the housing 10. The first electrode terminal 21 of one of two adjacent battery cells 100 in the battery module 310 and the second electrode terminal 22 of the other are disposed on the same side and connected by a conductive member 320.

[0182] Specifically, the electrode terminals of a battery cell 100 may 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 located at both ends of the width direction of the housing 10. The first electrode terminal 21 can be connected to the positive electrode tab to form a positive terminal. The second electrode terminal 22 can be connected to the negative electrode tab to form a negative terminal. Multiple battery cells 100 in the battery module 310 can be sequentially connected through the first wall 11. The first electrode terminal 21 of one of two adjacent battery cells 100 and the second electrode terminal 22 of the other adjacent battery cell 100 are located on the same side of the width direction of the battery cell 100 and connected through a conductive element 320, thereby connecting multiple battery cells 100 in the same battery module 310 in series. The conductive element 320 can be a conductive sheet.

[0183] By placing the first electrode terminal 21 of one of two adjacent battery cells 100 in the battery module 310 on the same side and connecting them through a conductive member 320, multiple battery cells 100 in the battery module 310 can be connected in series, thereby increasing the power capacity of the battery module 310.

[0184] Combination Figure 3 and Figure 6 As shown, in some embodiments of this application, the electrode terminals of a battery cell 100 may 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 disposed on both sides of the length direction of the housing 10. The first electrode terminal 21 of one of two adjacent battery cells 100 and the second electrode terminal 22 of the other battery cell 100 are disposed on the same side of the length direction of the housing 10 and are connected to each other through a conductive member 320, thereby connecting multiple battery cells 100 in the same battery module 310 in series.

[0185] The first electrode terminal 21 and the second electrode terminal 22 can be reasonably selected on the housing 10 according to the wiring requirements, so as to facilitate the connection of the first electrode terminal 21 and the second electrode terminal 22 to the external wiring respectively.

[0186] Combination Figure 3 and Figure 7As shown, in some embodiments of this application, a battery cell 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 being opposite. The plurality of first electrode terminals 21 are commonly disposed on one side of the housing 10 in the width direction and are spaced apart along the length direction of the housing 10. The plurality of second electrode terminals 22 are commonly disposed on the other side of the housing 10 in the width direction and are spaced apart along the length direction of the housing 10. Furthermore, the first electrode terminal 21 of one of two adjacent battery cells 100 and the second electrode terminal 22 of the other adjacent battery cell 100 are commonly disposed on the same side of the length direction of the housing 10 and are connected by a conductive member 320, thereby connecting the plurality of battery cells 100 in the same battery module 310 in series.

[0187] Combination Figure 3 and Figure 7 As shown, in some embodiments of this application, a 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 disposed on both sides of the housing 10 in the width direction, and the plurality of second electrode terminals 22 are respectively disposed on both sides of the housing 10 in the width direction. The first electrode terminals 21 and second electrode terminals 22 located on the same side are spaced apart along the length direction of the housing 10, and the first electrode terminals 21 and second electrode terminals 22 located on both sides are arranged opposite to each other along the width direction of the housing 10. Furthermore, the first electrode terminal 21 of one of two adjacent battery cells 100 and the second electrode terminal 22 of the other battery cell 100 located on the same side are connected by a conductive member 320, thereby connecting multiple battery cells 100 in the same battery module 310 in series.

[0188] The multiple first electrode terminals 21 and multiple second electrode terminals 22 can be reasonably selected in terms of their placement on the housing 10 according to wiring requirements, so as to facilitate the connection of the first electrode terminals 21 and the second electrode terminals 22 to external wiring respectively.

[0189] like Figure 3 As shown, in some embodiments of this application, the battery module 310 further includes a heat exchange plate 330, which is disposed on one side of the housing 10 in the length or width direction and is used to exchange heat with the battery cell 100.

[0190] Specifically, the heat exchange plate 330 is a generally flat plate structure and is located on one side of the housing 10 in the length or width direction. Optionally, the heat exchange plate 330 can be bonded to one side of the battery module 310 in the width direction by thermally conductive adhesive and exchange heat with multiple battery cells 100 respectively.

[0191] By exchanging heat between the heat exchange plate 330 and the battery cell 100, the temperature of the battery cell 100 can be regulated by the heat exchange plate 330, thereby improving the heat dissipation effect of the battery cell 100.

[0192] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the battery cell 100 further includes at least one pressure relief mechanism 30. The pressure relief mechanism 30 is provided at least one end of the housing 10 in the width direction or length direction. The pressure relief mechanism 30 is configured to release the internal pressure of the housing 10 when the internal pressure or temperature of the housing 10 reaches a threshold.

[0193] Specifically, the pressure relief mechanism 30 can be located on a side wall of the housing 10 other than the first wall 11, and can be located on the same side, opposite side, or adjacent side as the first electrode terminal 21. Optionally, the pressure relief mechanism 30 is an explosion-proof valve.

[0194] By providing a pressure relief mechanism 30 on the housing 10, when the internal pressure or temperature of the housing 10 reaches a threshold, the pressure relief mechanism 30 can open and release the internal pressure of the housing 10, thereby improving the safety performance of the battery cell 100.

[0195] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, there are multiple pressure relief mechanisms 30, which are disposed together on one side of the width direction of the housing 10, and are spaced apart along the length direction of the housing 10.

[0196] By setting multiple pressure relief mechanisms 30 and arranging them at intervals along the length of the housing 10 on one side of the width of the housing 10, when the internal pressure or temperature of the housing 10 reaches a threshold, one or more of the multiple pressure relief mechanisms 30 can open and release the internal pressure of the housing 10, thereby improving the safety performance of the battery cell 100.

[0197] Combination Figure 4 and Figure 5 As shown, in some embodiments of this application, the battery cell 100 further includes a sampling component 40, which is disposed on one side of the housing 10 in the length or width direction and is used to collect the voltage and temperature of the battery cell 100.

[0198] Specifically, the sampling component 40 can be a sampling chip and is disposed on one side of the housing 10 in the length or width direction. Optionally, the sampling component 40 can be bonded to one side of the housing 10 in the length direction.

[0199] By collecting the voltage and temperature of the battery cell 100 through the sampling component 40, the working status of the battery cell 100 can be monitored, thereby improving the working reliability of the battery cell 100 and the battery module 310.

[0200] Combination Figures 1 to 3 As shown, in some embodiments of this application, 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 210. The at least one partition 210 divides the receiving cavity into multiple cavities along the length direction. Multiple battery modules 310 are provided in any cavity. Multiple battery modules 310 in the same cavity are connected in series to form a battery cluster 300.

[0201] Specifically, the partition 210 is arranged vertically, and its two ends in the vertical direction are connected to the top and bottom walls of the cabinet 200, respectively. The two ends of the partition 210 in the horizontal direction are connected to the two side walls in the width direction of the cabinet 200, thereby dividing the accommodating cavity within the cabinet 200 into multiple cavities along its length. Optionally, the partition can be a partition plate or a partition beam.

[0202] By setting up the separator 210 and dividing the receiving cavity into multiple cavities through the separator 210, the battery clusters 300 located in different cavities can reduce mutual interference during operation, thereby improving the operational reliability of the energy storage device 1000.

[0203] Combination Figures 1 to 3 As shown, in some embodiments of this application, the energy storage device 1000 further includes a fixing plate 600, which is disposed above the battery module 310, and at least two adjacent battery modules 310 are respectively connected to the fixing plate 600.

[0204] Specifically, the topmost battery cell 100 of each of two adjacent battery modules 310 can be fixedly connected to the fixing plate 600, such as by welding or bonding, thereby improving the connection reliability between the two adjacent battery modules 310. Alternatively, the topmost battery cell 100 of each of two adjacent battery modules 310 can be detachably connected to the fixing plate 600, such as by snap-fitting or connecting through connectors, thereby improving the connection reliability between the two adjacent battery modules 310 and facilitating the disassembly and installation of the battery modules 310 and the fixing plate 600.

[0205] By connecting the top of two adjacent battery modules 310 to the fixing plate 600 respectively, the top 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 improving the fixing effect of the battery modules 310.

[0206] Combination Figures 1 to 3 As shown, in some embodiments of this application, the energy storage device 1000 further includes a support 500, which is disposed in the receiving cavity and connected to the inner wall of the receiving cavity, and two adjacent trays 400 are connected through the support 500.

[0207] Specifically, the bracket 500 is disposed in the receiving cavity and is fixedly or detachably connected to the inner wall of the receiving cavity, specifically, it can be connected to the bottom wall of the receiving cavity. Two adjacent trays 400 are connected by the bracket 500, including fixed connection or detachable connection. Among them, the fixed connection includes welding or bonding, and the detachable connection includes snap-fit ​​or connection through connectors.

[0208] By connecting two adjacent trays 400 to a bracket 500 respectively, the bracket 500 can be used to connect and fix the two adjacent trays 400, thereby improving the connection reliability of the two adjacent trays 400, improving the fixing effect of the trays 400, and thus improving the fixing effect of the battery module 310 on the trays 400.

[0209] Combination Figures 1 to 3 As shown, in some embodiments of this application, the number of battery modules 310 along the length direction of the receiving cavity is 8, and the 8 battery modules 310 form 4 battery clusters 300. Each battery cluster 300 includes two battery modules 310 connected in series. The number of battery modules 310 along the width direction of the receiving cavity is 1.

[0210] Specifically, two adjacent battery modules 310 are connected in series to form a battery cluster 300, thereby increasing the output power of the battery cluster 300. At the same time, two adjacent battery clusters 300 can be spaced apart by a separator 210.

[0211] By setting eight battery modules 310 along the length of the cavity and one battery module 310 along the width of the cavity, the number of battery modules 310 can be increased without exceeding the cavity inside the cabinet 200, thereby improving the space utilization rate inside the cabinet 200.

[0212] Combination Figures 1 to 3 As shown, in some embodiments of this application, the energy storage device 1000 further includes a bracket 800, which is disposed in the receiving cavity and connected to the inner wall of the receiving cavity. A number of trays 400 are connected to the bracket 800 and are used together to divide the receiving cavity into multiple chambers in the vertical direction. A battery module 310 is disposed in the chamber.

[0213] Specifically, the bracket 800 is disposed in the receiving cavity and is fixedly or detachably connected to the inner wall of the receiving cavity, specifically, it can be connected to the side wall of the receiving cavity. The tray 400 can be disposed above the bracket 800 and is fixedly or detachably connected to the bracket 800. The fixed connection includes welding or bonding, while the detachable connection includes snap-fitting or connection via connectors. Simultaneously, the same cavity can also house multiple battery modules 310 arranged horizontally, with the multiple battery modules 310 in the same cavity connected in series to form a battery cluster 300.

[0214] The tray 400 is connected to the bracket 800 and is used to divide the receiving cavity into multiple chambers in the vertical direction, thereby facilitating the installation of multiple battery modules 310 in the cabinet 200 in the vertical direction, which in turn facilitates the improvement of the vertical space utilization rate in the cabinet 200 and the distribution of various battery modules 310 in the cabinet 200.

[0215] Combination Figures 1 to 3 As shown, in some embodiments of this application, the energy storage device 1000 further includes a control cabinet, a power distribution cabinet, and a combiner cabinet. The control cabinet, power distribution cabinet, and combiner cabinet are respectively located outside the cabinet 200 and are electrically connected to the battery module 310.

[0216] Specifically, the control cabinet is used to monitor and protect the battery module 310. The distribution cabinet is used to supply power to other electrical equipment in the energy storage device 1000, such as power for fire protection and liquid cooling units. The combiner cabinet is used to combine the voltages of multiple battery modules 310 together. The cabinet 200 is mainly used to store the battery modules 310 and the wiring connected to them.

[0217] By placing the control cabinet, power distribution cabinet, and combiner cabinet on the outside of the cabinet 200, the space occupied by the control cabinet, power distribution cabinet, and combiner cabinet in the cabinet 200 is reduced, and more battery modules 310 can be installed in the cabinet 200, thereby improving the space utilization rate of the cabinet 200.

[0218] Combination Figure 1 , Figure 2 , Figure 3 and Figure 10 As shown, the second aspect of this application proposes a method for assembling an energy storage device 1000 according to any of the above embodiments. The energy storage device 1000 includes a cabinet 200, and the cabinet 200 has a receiving cavity formed inside. The method for assembling the energy storage device includes the following steps:

[0219] Multiple battery modules 310 are provided, and each battery module 310 includes multiple battery cells 100 connected in sequence.

[0220] Multiple battery modules 310 are arranged one-to-one on top of multiple trays 400, and any one of the battery modules 310 is connected to the tray 400 through a battery cell 100.

[0221] Multiple connected battery modules 310 and trays 400 are placed inside the cabinet 200, and the trays 400 are connected to the cabinet 200.

[0222] Specifically, multiple battery cells 100 can be sequentially connected to form a battery module 310 on the outside of the cabinet 200. Each battery cell 100 includes a first wall 11 with the largest area, and the first wall 11 is positioned facing the top wall of the cabinet 200. Multiple battery cells 100 are arranged sequentially in a vertical direction and connected to each other through the first wall 11, such as by bonding, thereby forming the battery module 310.

[0223] Multiple battery modules 310 are formed using the above method, and trays 400, matching the number of battery modules 310, are provided. The battery modules 310 are positioned one-to-one on top of the trays 400 on the outside of the cabinet 200. The bottommost battery cell 100 of any battery module 310 is connected to the tray 400, such as by adhesive bonding, to form an integral structure. The multiple integral battery modules 310 and trays 400 are then placed in the receiving cavity of the cabinet 200, spaced apart along the length of the cavity. Each integral battery module 310 and tray 400 is connected to the cabinet via the tray 400, thus fixing the battery module 310 within the receiving cavity of the cabinet 200. Finally, at least two battery modules 310 are grouped together, and at least two battery modules 310 in a group are connected in series to form a battery cluster 300.

[0224] According to the assembly method of the energy storage device of this application, by sequentially connecting multiple battery cells 100 to form a battery module 310, and directly connecting at least one of the battery cells 100 to the tray 400, there is no need to set up a frame structure for assembling multiple battery cells 100 into the battery module 310, thereby reducing the space occupied by the frame structure in the cabinet 200, and thus improving the space utilization 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, after the battery module 310 and the tray 400 are connected as a whole, they are jointly placed inside the cabinet 200 and connected to the cabinet 200 through the tray 400, which facilitates the assembly between the battery module 310 and the cabinet 200.

[0225] Combination Figure 1 , Figure 2 and Figure 3As shown, in some embodiments of this application, the energy storage device 1000 further includes a bracket 800, 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:

[0226] Multiple connected battery modules 310 and trays 400 are placed inside the cabinet 200, and a portion of the trays 400 are connected to the bottom wall of the receiving cavity. Another portion of the trays 400 are placed above the bracket 800 and connected to the bracket 800. The trays 400 and the bracket 800 are used together to divide the receiving cavity into multiple chambers in the vertical direction.

[0227] Specifically, a bracket 800 is provided in the receiving cavity. The bracket 800 is vertically positioned between the top and bottom walls of the cabinet 200 and connected to the side walls of the cabinet 200. The battery module 310 and the tray 400 connected to the outside of the cabinet 200 are placed in the receiving cavity. Some of the trays 400 are connected to the bottom wall of the receiving cavity, while others are positioned above the bracket 800 and connected to the bracket 800. Thus, the trays 400 and the bracket 800 together serve to divide the receiving cavity into multiple chambers vertically, and each chamber contains a battery module 310.

[0228] The tray 400 is connected to the bracket 800 and is used to divide the receiving cavity into multiple chambers in the vertical direction, thereby facilitating the vertical placement of multiple battery modules 310 within the cabinet 200. This improves the vertical space utilization within the cabinet 200 and allows for various distribution configurations of the battery modules 310 within the cabinet 200. The above description is merely an overview of the technical solution of this application. To better understand the technical means of this application and to implement it according to the description, and to make the above and other objects, features, and advantages of this application more apparent, specific embodiments of this application are described below.

[0229] Combination Figures 1 to 5 As shown, in some embodiments of this application, the energy storage device 1000 is a 20-foot container. The energy storage device 1000 includes a cabinet 200, a plurality of battery modules 310, and a plurality of trays 400. The cabinet 200 has an internal receiving cavity, in which the plurality of battery modules 310 are disposed. Each battery module 310 includes a plurality of battery cells 100 connected in sequence. The plurality of trays 400 are disposed in the receiving cavity, wherein the plurality of battery modules 310 are correspondingly disposed above the trays 400, and at least one battery cell 100 of the same battery module 310 is connected to the tray 400.

[0230] Combination Figures 1 to 5As shown, multiple battery cells 100 in the battery module 310 are arranged vertically and connected sequentially. Each battery cell 100 includes a first wall 11 with the largest area, which faces the top wall of the cabinet 200. The lowest battery cell 100 is connected to the tray 400. Each battery cell 100 includes a housing 10 and electrode terminals disposed on the housing 10. The housing 10 has a length dimension L1, a width dimension W1, and a height dimension H1, wherein H1 < W1 ≤ L1. The length and width directions of the housing 10 extend horizontally, and the height direction of the housing 10 extends vertically. The receiving cavity has a length dimension L2, a width dimension W2, and a height dimension H2, wherein L1 < W2 < L2. The length direction of the housing 10 coincides with the width direction of the receiving cavity, the width direction of the housing 10 coincides with the length direction of the receiving cavity, and the height direction of the housing 10 coincides with the height direction of the receiving cavity.

[0231] Combination Figures 1 to 5 As shown, along the length of the receiving cavity, there are n battery modules 310, where 0.8 ≤ n * W1 / L2 < 1, and n is a positive integer greater than or equal to 2. Along the width of the receiving cavity, there are s battery modules 310, where 0.8 ≤ s * L1 / W2 < 1, and s is a positive integer greater than or equal to 1. A connector is provided on one side of the receiving cavity along its width, through which the battery modules 310 are inserted into the interior of the cabinet 200. The energy storage device 1000 also includes a door 700, which is connected to the cabinet 200 and configured to open or close the connector.

[0232] Combination Figures 3 to 5 As shown, the outer casing 10 is a prismatic metal casing with dimensions 2000mm≤L1≤2300mm, L1 / W1≤3.7, 7mm≤H1≤30mm, and 210≤L1 / H1≤320. The electrode terminals include 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 located on both sides of the width direction of the outer casing 10. In the battery module 310, the first electrode terminal 21 of one of two adjacent battery cells 100 and the second electrode terminal 22 of the other are located on the same side and connected by a conductive element 320. The battery module 310 also includes a heat exchange plate 330, which is located on one side of the width direction of the outer casing 10 and is used for heat exchange with the battery cells 100. The battery cell 100 also includes a sampling component 40, which is located on one side of the length direction of the outer casing 10 and is used to collect the voltage and temperature of the battery cell 100.

[0233] Combination Figures 1 to 3As shown, along the length of the receiving cavity, at least one partition 210 is provided inside the receiving cavity, dividing the receiving cavity into multiple chambers along the length direction. Multiple battery modules 310 are housed in any one chamber, and the multiple battery modules 310 in the same chamber are connected in series to form a battery cluster 300. The energy storage device 1000 also includes a fixing plate 600, which is located above the battery cluster 300. The topmost 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 also includes a support 500, which is located in the receiving cavity and connected to the inner wall of the receiving cavity. The trays 400 below each of two adjacent battery modules 310 in the same battery cluster 300 are connected through the support 500. Along the length of the cavity, there are 8 battery modules 310, which form 4 battery clusters 300. Each battery cluster 300 includes two battery modules 310 connected in series. Along the width of the cavity, there is 1 battery module 310.

[0234] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: The cabinet has an internal cavity for receiving the contents. Multiple battery modules are disposed in the receiving cavity, and each battery module includes multiple battery cells connected in sequence. Multiple trays, wherein the multiple trays are disposed in the receiving cavity and connected to the cabinet; In this configuration, multiple battery modules are respectively disposed above multiple trays, and at least one battery cell in the same battery module is connected to the tray.

2. The energy storage device according to claim 1, characterized in that, Multiple battery cells are arranged vertically, and each battery cell includes a first wall with the largest area, which faces the top wall of the cabinet.

3. The energy storage device according to claim 2, characterized in that, The battery module contains multiple battery cells connected in sequence, and the bottommost battery cell is connected to the tray.

4. The energy storage device according to claim 1, characterized in that, The battery cell includes a housing and electrode terminals disposed on the housing. The housing has a length dimension L1, a width dimension W1, and a height dimension H1, wherein H1 < W1 ≤ L1. The length and width directions of the housing extend horizontally, and the height direction of the housing extends vertically.

5. The energy storage device according to claim 4, characterized in that, The receiving 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 is consistent with the width direction of the receiving cavity, the width direction of the outer shell is consistent with the length direction of the receiving cavity, and the height direction of the outer shell is consistent with the height direction of the receiving cavity.

6. The energy storage device according to claim 5, characterized in that, Along the length of the receiving cavity, the number of battery modules is n, and 0.8≤n*W1 / L2<1, where n is a positive integer greater than or equal to 2.

7. The energy storage device according to claim 5, characterized in that, Along the width direction of the receiving cavity, the number of battery modules is s, where 0.8≤s*L1 / W2<1, and s is a positive integer greater than or equal to 1.

8. The energy storage device according to claim 5, characterized in that, The cavity is provided with an insertion interface on one side in the width direction, and the battery module is inserted into the interior of the cabinet through the insertion interface.

9. The energy storage device according to claim 8, characterized in that, The energy storage device also includes a door connected to the cabinet, the door being configured to open or close the plug-in interface.

10. The energy storage device according to claim 4, characterized in that, The outer shell is a prismatic shell made of metal, with 2000mm≤L1≤2300mm and L1 / W1≤3.

7.

11. The energy storage device according to claim 10, characterized in that, 7mm≤H1≤30mm.

12. The energy storage device according to claim 10, characterized in that, 70≤L1 / H1≤320.

13. The energy storage device according to claim 12, characterized in that, 210≤L1 / H1≤320.

14. The energy storage device according to claim 4, characterized in that, The electrode terminals include a first electrode terminal and a second electrode terminal with opposite polarities. The first electrode terminal and the second electrode terminal are respectively located on both sides of the width direction of the housing. In the battery module, the first electrode terminal of one of two adjacent battery cells and the second electrode terminal of the other are located on the same side and connected by a conductive element.

15. The energy storage device according to claim 4, characterized in that, The battery module also includes a heat exchange plate, which is disposed on one side of the outer casing in the length or width direction and is used to exchange heat with the battery cells.

16. The energy storage device according to claim 4, characterized in that, The battery cell also includes a sampling component, which is located on one side of the casing in the length or width direction and is used to collect the voltage and temperature of the battery cell.

17. The energy storage device according to claim 1, characterized in that, The energy storage device is a 20-foot container.

18. The energy storage device according to claim 1, characterized in that, 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 according to claim 1, characterized in that, 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 according to claim 1, characterized in that, 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 according to claim 5, characterized in that, 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 according to any one of claims 1 to 21, characterized in that, 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 according to any one of claims 1 to 21, characterized in that, 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 for assembling an energy storage device, characterized in that, 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 assembly method of the energy storage device according to claim 24, characterized in that, 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.

Images