Energy storage device

Abstract

An energy storage device comprises a box body, a battery module, an electric control module and a heat management module, the battery module comprises a plurality of battery columns, the plurality of battery columns are sequentially arranged in a first direction, each battery column comprises a plurality of battery packs, and the plurality of battery packs are sequentially arranged in a second direction; the electric control module is accommodated in the box body and is arranged below the battery module, the electric control module comprises a high-voltage unit, the high-voltage unit is arranged below at least one battery column, and the battery column above the high-voltage unit and the adjacent battery column are electrically connected with the high-voltage unit; the heat management module is accommodated in the box body and is arranged on one side of the battery module in the first direction; according to the energy storage device, the two battery columns are controlled at the same time through the high-voltage unit below the single battery column, the space occupied by the high-voltage unit below the battery columns is saved, the space utilization rate is increased, and the electric quantity and the energy density of the energy storage device are improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and specifically to an energy storage device. Background Technology

[0002] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and daily life, energy storage devices are needed. As devices that cyclically store and release electrical energy, energy storage devices store electrical energy or supply the stored energy to electrical devices through charging or discharging. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0003] Existing energy storage devices require high-voltage units for each battery cell. These units occupy a significant portion of the device's volume, impacting the overall layout of the enclosure and consequently affecting the internal space utilization and energy density. How to fully utilize the internal space of the enclosure, increase the total capacity of the energy storage device, and meet energy density requirements remains a crucial technical challenge requiring continuous improvement in energy storage technology. Summary of the Invention

[0004] The purpose of this application is to provide an energy storage device that can make full use of the internal space of the enclosure and improve the energy density of the energy storage device.

[0005] To achieve the objectives of this application, the following technical solution is provided: In a first aspect, this application provides an energy storage device, including a housing, a battery module, an electronic control module, and a thermal management module. The battery module is housed in the housing and includes multiple battery rows arranged sequentially along a first direction. Each battery row includes multiple battery packs, which are arranged sequentially along a second direction. The electronic control module is housed in the housing and disposed below the battery module. The electronic control module includes a high-voltage unit, which is disposed below at least one battery row. The battery rows above the high-voltage unit and an adjacent battery row are electrically connected to the high-voltage unit. The thermal management module is housed in the housing and disposed on one side of the battery module along the first direction. Wherein, the first direction is the length direction of the box, and the second direction is the height direction of the box.

[0006] In one embodiment, the housing is a standardized housing. By placing the high-voltage unit below the battery array and electrically connecting it to the battery array above and an adjacent battery array, the electronic control module, originally located on one side of the battery module in the first direction, is moved to the bottom of the battery array adjacent to the high-voltage unit. This increases the space of the housing in the first direction, excluding the thermal management module, thereby providing more space for the battery module to increase the size of the battery array in the first direction or increase the number of battery arrays.

[0007] In one embodiment, in the orthographic projection of the second direction, the high-voltage unit is spaced apart from the adjacent battery array.

[0008] In one embodiment, in the first direction, the size of the battery array is D1, and the size of the high-voltage unit is D2, satisfying: 0.8≤D2 / D1≤1.2.

[0009] In one embodiment, the high-voltage unit further includes a separator, which is disposed between the two high-voltage boxes in the first direction.

[0010] In one embodiment, in the first direction, the size of the battery array is D1, and the size of the high-voltage box is D2, satisfying: 0.4≤d / D1≤0.55.

[0011] In one embodiment, the electronic control module further includes a power distribution unit and a switching unit. The high-voltage unit, the power distribution unit, and the switching unit are spaced apart along a first direction, and the power distribution unit and the switching unit are respectively located below different battery rows.

[0012] In one embodiment, the power distribution unit includes a power distribution box and a UPS box arranged sequentially along the first direction, and both the power distribution box and the UPS box are electrically connected to a plurality of battery columns.

[0013] In one embodiment, in two adjacent battery rows, at least one battery row has the high-voltage unit disposed below it, and the other battery row has the power distribution unit or the transfer unit disposed below it.

[0014] In one embodiment, in the first direction, the size of the battery array is D1, the size of the power distribution unit is D3, and the size of the transfer unit is D4, satisfying: 0.8≤D3 / D1≤1.2, 0.8≤D4 / D1≤1.2.

[0015] In one embodiment, the electronic control module further includes an electrical connector, which is electrically connected to the electronic control module. The electrical connector has multiple connection positions, and each battery pack includes a connector. The connectors of the multiple battery packs are electrically connected to the multiple connection positions in a one-to-one correspondence.

[0016] In one embodiment, the electrical connector is a copper busbar, and the plurality of connection positions are staggered on the electrical connector.

[0017] In one embodiment, there are multiple electrical connectors, and the high-voltage unit, the power distribution unit, and the transfer unit are each provided with an electrical connector.

[0018] In one embodiment, in the first direction, the size of the battery array is D1, and the size of the thermal management module is D5, satisfying: 1230mm≤D1≤1400mm, 380mm≤D5≤420mm.

[0019] In one embodiment, the energy storage device further includes a plurality of support columns, which are spaced apart in the first direction, and the battery array is disposed between two adjacent support columns. The cluster frame is connected to two adjacent support columns.

[0020] In one embodiment, the energy storage device further includes a cluster rack housed within the housing, and multiple battery packs from the plurality of battery columns are mounted on the cluster rack.

[0021] In one embodiment, the energy storage device further includes a heat exchange pipeline installed on the cluster frame and connecting the thermal management module with multiple battery packs.

[0022] In one embodiment, each battery pack includes multiple battery cells arranged in an array of M rows and N columns, where M ≥ 2 and M is a positive integer, and N ≥ 2 and N is a positive integer. The larger surface of each battery cell faces the first direction. The row direction is the third direction, the column direction is the first direction, and the third direction is the width direction of the housing.

[0023] In one embodiment, the M cells in the first column are connected in series along the third direction, and the second to the Mth cells in any one of the second to Nth columns are connected in series. The first cell in column g is connected in series with the first cell in column g+1, and the Mth cell in column g is connected in series with the Mth cell in column g+1, where g is an odd number and 1≤g≤N-1; The first cell in the i-th column is connected in series with the first cell in the (i+1)-th column, and the second cell in the i-th column is connected in series with the second cell in the (i+1)-th column, where i is an even number and 2≤i≤N-1.

[0024] In one embodiment, there are four battery rows, and each battery row includes eight battery packs arranged sequentially in the second direction.

[0025] In one embodiment, the box is a standardized box, the dimension of the box in the first direction is a, the dimension in the third direction is b, and the dimension in the second direction is c, satisfying: 6052mm≤a≤6064mm, 2433mm≤b≤2443mm, 2571mm≤c≤2891mm.

[0026] In one embodiment, a fire-fighting module is further provided above the battery module. The size of the electronic control module in the second direction is h1, and the size of the fire-fighting module in the second direction is h2, satisfying: 250mm≤h1≤350mm, 250mm≤h2≤300mm.

[0027] In one embodiment, the spacing between two adjacent battery rows in the first direction is f, which satisfies: 50mm≤f≤120mm.

[0028] In one embodiment, in each of the battery rows, the distance between two adjacent battery packs in the second direction is h3, satisfying: 14mm≤h3≤17mm.

[0029] In one embodiment, the dimension of the electronic control module in the third direction is w1, and the dimension of the thermal management module in the third direction is w2, satisfying: w1≤2233mm, w2≤2233mm.

[0030] In one embodiment, the battery module has a dimension of T1 in the first direction, the electronic control module has a dimension of T2 in the first direction, the thermal management module has a dimension of T3 in the first direction, and the fire protection module has a dimension of T4 in the first direction, satisfying: T1≤5858mm, T2≤5858mm, T3≤5858mm, T4≤5858mm.

[0031] In one embodiment, a plurality of the battery cells are arranged in an array of 16 rows and 6 columns. The battery cells are of standardized size and have a capacity of A, satisfying: 588 Ah ≤ A ≤ 660 Ah.

[0032] In one embodiment, the battery pack has a capacity of E1, a dimension of W1 in the first direction, a dimension of H1 in the second direction, and a dimension of L1 in the third direction, satisfying: 195kWh≤E1≤220kWh; 1200mm≤W1≤1400mm, 240mm≤H1≤280mm, 2000mm≤L1≤2300mm.

[0033] In one embodiment, the energy storage device has a power rating of E2, satisfying: 6.26 MWh ≤ E2 ≤ 7.10 MWh, and / or 420 KW / m 2 ≤E2 / (a×b) ≤500KW / m 2 .

[0034] In one implementation, A = 660 Ah, satisfying: 219 kWh ≤ E1 ≤ 220 kWh, 6.9 MWh ≤ E2 ≤ 7.1 kWh, 475.6 kW / m³ 2 ≤E2 / (a×b) ≤476KW / m 2 .

[0035] By housing battery modules, electronic control modules, and thermal management modules within the enclosure, the high-voltage unit located below a single battery column can simultaneously control two battery columns, saving space occupied by the high-voltage unit below the battery column. The space below the battery modules can also accommodate other units of the electronic control module, improving space utilization and thus increasing the energy density of the energy storage device. Furthermore, without changing the enclosure dimensions, placing all electronic control modules below the battery modules reduces the space occupied by other modules in the first direction compared to placing at least part of the electronic control module and the thermal management module on the side of the battery modules in the first direction. This increases the space ratio of the battery modules in the first direction, allowing the energy storage device to have a higher capacity within the same volume, thereby improving the energy density of the energy storage device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A schematic diagram of an energy storage device according to one embodiment; Figure 2 This is a perspective view of a battery pack according to one embodiment; Figure 3 This is an exploded schematic diagram of a battery pack according to one embodiment; Figure 4 This is a schematic diagram of an electrical connector according to one embodiment.

[0038] Explanation of reference numerals in the attached figures: 100-Energy storage device, 10-Box, 20-Battery module, 21-Battery row, 211-Battery pack, 212-Battery cell, 30-Electrical control module, 31-High voltage unit, 311-High voltage box, 312-Separator, 32-Power distribution unit, 321-Power distribution box, 322-UPS box, 33-Transfer unit, 34-Electrical connector, 341-Connection position, 40-Thermal management module, 50-Fire protection module; X - First direction, Z - Second direction, Y - Third direction, D1 - Dimension of battery pack in the first direction, D2 - Dimension of high voltage unit in the first direction, d - Dimension of high voltage box in the first direction, D3 - Dimension of power distribution unit in the first direction, D4 - Dimension of transfer unit in the first direction, D5 - Dimension of thermal management module in the first direction, h1 - Dimension of electrical control module in the second direction, h2 - Dimension of fire protection module in the second direction, h3 - Spacing between two adjacent battery packs in the second direction, f - Dimension of two adjacent battery packs in the first direction, W1 - Dimension of battery pack in the first direction, H1 - Dimension of battery pack in the second direction, L1 - Dimension of battery pack in the third direction, a - Dimension of enclosure in the first direction. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0042] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0043] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and daily life, energy storage devices are needed. As devices that cyclically store and release electrical energy, energy storage devices store electrical energy or supply the stored energy to electrical devices through charging or discharging. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0044] Existing energy storage devices typically use enclosures for assembly and transportation. Since the dimensions of these enclosures are fixed, how to fully utilize the internal space of the enclosure to increase the energy storage device's capacity within a standard space and meet energy density requirements remains a technical challenge that requires continuous improvement in energy storage technology.

[0045] First, define the direction. Please refer to [the relevant documentation / reference]. Figure 1 X is the first direction, Z is the second direction, and Y is the third direction. The first direction X, the second direction Z, and the third direction Y intersect each other. Optionally, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0046] In one specific implementation, please refer to Figure 1 The first direction X is the length direction of the box 10, the second direction Z is the height direction of the box 10, and the third direction Y is the width direction of the box 10.

[0047] Please refer to Figures 1 to 3 This application provides an energy storage device 100, including a housing 10, a battery module 20, an electronic control module 30, and a thermal management module 40. The battery module 20 is housed in the housing 10 and includes multiple battery columns 21. The multiple battery columns 21 are arranged sequentially along a first direction X. Each battery column 21 includes multiple battery packs 211, and the multiple battery packs 211 are arranged sequentially along a second direction Z.

[0048] The enclosure 10 is made of a material with high structural strength, specifically metal, high-strength plastic, ceramic, etc. Metal materials include, for example, aluminum, aluminum alloy, magnesium alloy, iron, and iron alloys, with no restrictions. Optionally, the wall thickness of the enclosure 10 can be approximately uniform throughout.

[0049] The dimensions of container 10 can be those of standard shipping containers, such as 10 feet, 20 feet, 30 feet, 40 feet, or 45 feet, conforming to the corresponding standards, with corresponding length, width, and height dimensions. Standard containers can be referenced in GB / T1413-2023 Series 1: Container Classification, Dimensions, and Rated Mass.

[0050] In one embodiment, the box 10 is a standardized box with a dimension a in the first direction, a dimension b in the third direction, and a dimension c in the second direction, satisfying: 6052mm≤a≤6064mm, 2433mm≤a≤2443mm, and 2571mm≤c≤2891mm.

[0051] In one specific implementation, the container 10 is a 20-foot standard container. The dimension a of the container 10 in the first direction X is 6058mm with a tolerance of 0mm-6mm; the dimension c of the container 10 in the second direction Z is 2576mm or 2896mm with a tolerance of 0mm-5mm; and the dimension b of the container 10 in the third direction Y is 2438mm with a tolerance of 0mm-5mm.

[0052] In other embodiments, the housing 10 may also be any housing of the specified size that is feasible in the art, and there is no specific limitation.

[0053] In the embodiments of this application, for boxes 10 of various sizes, dimensions within the range of ±1%, ±2%, ±3%, ±4%, and ±5% can be regarded as dimensions within the tolerance range.

[0054] By using the enclosure 10, the energy storage device 100 is easier to transport and install, and it helps to improve the problem of excessive volume or weight during transportation, thereby reducing the transportation cost of the energy storage device 100 and thus reducing the operating cost of the energy storage device 100.

[0055] The battery pack 211 can adopt any feasible structure in the art, and the embodiments of this application do not impose specific limitations. In one embodiment, please refer to... Figure 2 and Figure 3 The battery pack 211 can adopt a CTP battery pack. CTP (Cell to Pack) is an innovative technology that skips the standardized module stage and directly integrates the battery cells 212 into the battery pack 211. By reducing the use of fasteners such as module shells, side plates, and screws, the battery pack 211 can accommodate more battery cells 212, improving space utilization, energy density, and reducing costs.

[0056] Optionally, within the housing 10, multiple battery packs 211 are arranged in a multi-row, multi-column array. (See also...) Figure 2The width direction of the battery pack 211 is the first direction X, the height direction of the battery pack 211 is the second direction Z, and the length direction of the battery pack 211 is the third direction Y. Optionally, in the third direction Y, each battery column 21 is provided with only one battery pack 211, and a single battery pack 211 can fill the space of the battery cavity in the third direction Y.

[0057] Optionally, the battery pack 211 includes multiple energy units, each capable of storing a large amount of electrical energy and capable of multiple charge-discharge cycles. The energy units can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and this application embodiment is not limited in this regard. As an example, the energy units can be cylindrical energy units, prism energy units, pouch energy units, or energy units of other shapes. Prismular energy units include prismatic energy units, blade-shaped energy units, and multi-prism batteries, such as hexagonal prism batteries, etc., and this application embodiment does not have any particular limitations.

[0058] Optionally, multiple battery packs 211 can be pre-assembled or combined to form a battery module 20, and then assembled with the housing 10; or, multiple battery packs 211 can be assembled with the housing 10 separately, without limitation.

[0059] In one embodiment, the energy storage device 100 further includes a cluster rack (not shown), which is housed in a housing, and multiple battery packs 211 of the multiple battery rows 21 are mounted on the cluster rack.

[0060] The cluster frame can be an integral structure or a separate structure, and any feasible cluster frame structure in this field can be adopted without limitation. Optionally, the battery pack 211 and the cluster frame can be connected by welding, bonding, snap-fitting, screwing, riveting, etc., without limitation.

[0061] With this configuration, the installation of the multiple battery packs 211 in the battery module 20 is simple and reliable.

[0062] In one embodiment, the energy storage device 100 further includes a plurality of support columns, which are spaced apart in the first direction X. A battery array 21 is provided between two adjacent support columns, and the cluster frame is connected to two adjacent support columns.

[0063] The support columns are made of materials with high structural strength, such as metals, high-strength plastics, ceramics, etc. Metals include aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys, among others. The support columns and the housing 10 can be an integral or separate structure, without restriction.

[0064] Optionally, the number of support columns is the number of battery rows 21 plus one. With this configuration, each battery row 21 has support columns on both sides, providing structural support for the battery row 21.

[0065] Optionally, the cluster frame and the support column can be connected by welding, bonding, snap-fitting, screwing, riveting, plugging, etc., without restriction.

[0066] By setting up support columns, the overall mechanical strength of the housing 10 can be enhanced, providing stable support for the battery module 20.

[0067] In one embodiment, the size of the support column in the first direction X can be between 50mm and 120mm. Ensuring the size of the support column falls within this range guarantees its structural strength while minimizing its space occupation, thus increasing the space ratio of the battery module within the housing. If the support column is too large, it occupies excessive space and increases cost; if it is too small, its structural strength is insufficient to provide effective support for the battery array 21. Optionally, the specific size of the support column can be 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, or 120mm.

[0068] Optionally, the dimensions of the multiple support columns in the first direction X can be the same or different, without restriction.

[0069] The electronic control module 30 is housed in the housing 10 and is located below the battery module 20. The electronic control module 30 includes a high-voltage unit 31, which is located below at least one battery row 21, and the battery row 21 above the high-voltage unit 31 and an adjacent battery row 21 are electrically connected to the high-voltage unit 31.

[0070] The electronic control module 30 is used for real-time monitoring and data analysis of the battery module 20, and for adjusting the charging and discharging current, voltage, and power of the battery module 20. The electronic control module 30 can be connected to the housing 10 by welding, bonding, snap-fitting, screwing, riveting, etc., without any restrictions.

[0071] The high-voltage unit 31 is used to realize the distribution of high-voltage DC power between the battery module 20 and the PCS (Power Conversion System), electrical load or power grid. The high-voltage box 311 usually integrates functional devices such as high-voltage contactors, fuses, pre-charge circuits and insulation resistance monitoring modules.

[0072] With this configuration, two adjacent battery rows 21 are electrically connected to the high-voltage unit 31 below the same battery row 21, which saves space below the other battery row 21, allowing other electronic control structures to be placed below the battery module 20, thus improving space utilization. The space originally used to accommodate the electronic control module 30 can now accommodate the battery row 21, further increasing energy density.

[0073] The thermal management module 40 is housed in the housing 10 and is disposed on one side of the battery module 20 in the first direction X.

[0074] The thermal management module 40 is used to dissipate the heat generated by the battery module 20 during operation, control the internal temperature of the enclosure 10, reduce the risk of thermal runaway of the battery module 20, and improve the safety of the energy storage device 100. Optionally, the thermal management module 40 includes, but is not limited to, liquid cooling structures, air cooling structures, or other feasible thermal management structures commonly used in the art, without limitation. By placing the thermal management module 40 inside the enclosure 10, it is beneficial to improve the integration of the enclosure 10 and reduce the workload of on-site installation.

[0075] In one embodiment, the thermal management module 40 includes a vertical liquid chiller, and the energy storage device 100 further includes heat exchange piping (not shown). The vertical liquid chiller is used to supply cooling medium to the heat exchange piping, which is used for a thermally conductive connection with the battery module 20. Optionally, the heat exchange piping is mounted on a cluster rack and connects the thermal management module 40 to multiple battery packs 211.

[0076] Optionally, the thermal management module 40 may also include a dehumidifier to maintain the ambient humidity inside the enclosure 10 within a preset range.

[0077] The thermal management module 40 can exchange heat with each battery pack 211 of the battery module 20 through heat exchange pipelines (such as liquid cooling pipelines), thereby managing the temperature of the battery module 20 and reducing the risk of temperature runaway of the battery module 20. Compared with placing the thermal management module 40 on top of the battery module 20, the thermal management module 40 placed on one side of the battery module 20 can be adapted to more sizes and models of liquid cooling devices, without customization, resulting in lower costs. In addition, it also reduces the difficulty of maintenance and replacement of the thermal management module 40.

[0078] In the existing energy storage device 100, the high voltage unit 31 is usually located below the battery row 21, corresponding to the battery row 21. The other units of the electronic control module 30 and the thermal management module 40 are located on one side of the battery module 20 in the first direction X. The two occupy a large space in the first direction X of the housing.

[0079] The energy storage device 100 in this embodiment of the application, by arranging a battery module 20, an electronic control module 30, and a thermal management module 40 inside the housing 10, allows the high-voltage unit 31, located below a single battery column 21, to simultaneously control two battery columns 21, saving the space occupied by the high-voltage unit 31 below the battery column 21. The space below the battery module 20 can also accommodate other units of the electronic control module 30, improving space utilization. Furthermore, without changing the housing size, placing all electronic control modules 30 below the battery modules 20 reduces the space occupied by the electronic control modules 30 in the first direction X, increasing the space ratio of the battery modules 20 in the first direction X. This results in the energy storage device 100 having a higher capacity within the same volume, thus improving the energy density of the energy storage device 100.

[0080] In one embodiment, the housing 10 is a standardized housing.

[0081] By placing the high-voltage unit 31 below the battery column 21 and electrically connecting it to the battery column 21 above and an adjacent battery column 21, the electronic control module 30, which was originally located on one side of the battery module 20 in the first direction X, is moved to the bottom of the battery column 21 adjacent to the high-voltage unit 31. This increases the space of the housing 10 in the first direction X, except for the thermal management module 40, thereby providing more space for the battery module 20 to increase the size of the battery column 21 in the first direction X or increase the number of battery columns 21.

[0082] In one embodiment, in the orthographic projection in the second direction Z, the high-voltage unit 31 is spaced apart from the adjacent battery array 21.

[0083] Optionally, for the two high-voltage boxes 311 of a high-voltage unit 31, in the second direction Z, there is a gap between one of the high-voltage boxes 311 and the battery column 21 disposed on the side opposite to the other high-voltage box 311 in the first direction X; for a single high-voltage unit 31, in the second direction Z, there is a gap between the high-voltage unit 31 disposed below the battery column 21 and the battery column 21 adjacent to the battery column 21.

[0084] This configuration avoids interference between the multiple battery columns 21 of the battery module 20 and the high-voltage unit 31 during installation.

[0085] In one implementation, such as Figure 1As shown, in the first direction X, the size of the battery array 21 is D1, and the size of the high-voltage unit 31 is D2, satisfying: 0.8 ≤ D2 / D1 ≤ 1.2. By satisfying D1 and D2 within the above range, the high-voltage unit 31 can reduce its size in the first direction X while meeting the electronic control requirements, saving space below the battery module 20 and improving space utilization. When the size of D2 / D1 is too small, the size of the high-voltage unit 31 in the first direction X is too small. To ensure electronic control requirements, its size in other directions (e.g., the second direction Z) will increase, increasing the space occupied by the high-voltage unit 31 in other directions, thus affecting the layout of the battery module 20. When the size of D2 / D1 is too large, the space saved by the high-voltage unit 31 in the first direction X is insufficient to accommodate other units of the electronic control module 30, also resulting in wasted space and affecting the energy density of the energy storage device 100. Optionally, the specific values ​​of D2 / D1 can be 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15, or 1.2.

[0086] In one implementation, such as Figure 1 As shown, the high-voltage unit 31 includes two high-voltage boxes 311 arranged sequentially along the first direction X. The battery row 21 above the high-voltage unit 31 and an adjacent battery row 21 are respectively electrically connected to a high-voltage box 311.

[0087] Optionally, the number of high-voltage boxes 311 corresponds to the number of battery rows 21, and multiple high-voltage boxes 311 are connected one-to-one with multiple battery rows 21. For example, there are four battery rows 21, with high-voltage units 31 located below two of the battery rows 21, and the four high-voltage boxes 311 of the two high-voltage units 31 are connected one-to-one with the four battery rows 21; or, there are eight battery rows 21, with high-voltage units 31 located below four of the battery rows 21, and the eight high-voltage boxes 311 of the four high-voltage units 31 are connected one-to-one with the eight battery rows 21.

[0088] With this configuration, the high-voltage box 311 connected to the two adjacent battery rows 21 shares the space under one battery row 21, which saves the space under the other battery row 21. This allows other electronic control structures to be placed under the battery module 20, improving space utilization. The space originally used to accommodate the electronic control module 30 can now accommodate the battery row 21, further increasing energy density.

[0089] In one implementation, such as Figure 1 As shown, the high-voltage unit 31 also includes a separator 312, which is disposed between the two high-voltage boxes 311 in the first direction X.

[0090] Optionally, in the orthogonal projection of the third party to the Y direction, at least a portion of the separator 312 coincides with the high-voltage box 311. The separator 312 may be made of a material with electromagnetic shielding effect to prevent electromagnetic interference between the two high-voltage boxes 311 of the high-voltage unit 31.

[0091] Optionally, the separator 312 and the high-voltage box 311 are spaced apart in the first direction X, or the separator 312 is connected to the high-voltage box 311, without limitation. Optionally, the separator 312 can also be connected to the box body 10 and / or the cluster frame, and the connection method is not specifically limited.

[0092] By setting up a separator 312, the two high-voltage boxes 311 in the same high-voltage unit 31 are prevented from interfering with each other.

[0093] In one embodiment, the size of the high-pressure box 311 is d, which satisfies: 0.4≤d / D1≤0.55.

[0094] By ensuring that d / D1 is within the aforementioned range, the high-voltage box 311 can reduce its size in the first direction X while meeting the electronic control requirements, saving space below the battery module 20 and improving space utilization. If d / D1 is too small, the high-voltage box 311 will be too small in the first direction X. To ensure electronic control requirements, its size in other directions (e.g., the second direction Z) will increase, increasing its space occupation in those directions and affecting the layout of the battery module 20. If d / D1 is too large, the space saved by the high-voltage box 311 in the first direction X will be insufficient to accommodate other units of the electronic control module 30, also resulting in wasted space and affecting the energy density of the energy storage device 100. Optionally, the specific values ​​of d / D1 can be 0.4, 0.43, 0.45, 0.48, 0.5, 0.53, and 0.55.

[0095] In one implementation, such as Figure 1 As shown, the electronic control module 30 also includes a power distribution unit 32 and a transfer unit 33. The high-voltage unit 31, the power distribution unit 32 and the transfer unit 33 are arranged at intervals along the first direction X, and the power distribution unit 32 and the transfer unit 33 are respectively arranged below different battery columns 21.

[0096] The power distribution unit 32 is used to electrically connect the battery module 20, the thermal management module 40, the high voltage unit 31, and the transfer unit 33, so as to facilitate the circuit conduction of the battery module 20, the thermal management module 40, and the electronic control module 30, and maintain the normal operation of the battery module 20, the thermal management module 40, and the electronic control module 30.

[0097] Optionally, the power distribution unit 32 includes a power distribution box 321 and a UPS box 322 (Uninterruptible Power Supply Module, backup power box) arranged sequentially in the first direction X. The power distribution box 321 and the UPS box 322 can be spaced apart or just touching in the first direction X, without restriction. The power distribution box 321 is used to distribute the electrical energy output from the battery module 20 to the internal loads of the energy storage device 100, such as air conditioning, lighting, and monitoring, and to monitor the voltage, current, power, and energy consumption of each branch in real time. The UPS box 322 serves as the emergency power supply for the energy storage device 100. When a voltage sag, interruption, or frequency deviation is detected, the UPS box 322 can switch to battery power mode to ensure the continuous operation of critical loads.

[0098] The adapter unit 33 is electrically connected to the battery module 20, the high-voltage unit 31, and the power distribution unit 32. Optionally, the adapter unit 33 serves as the electrical interface between the battery module 20 and the high-voltage unit 31, and it connects the positive and negative terminals of multiple battery rows 21 to a common busbar via copper busbars or flexible cables, thereby expanding the large-capacity energy storage device 100. Optionally, the adapter unit 33 includes a combiner box, which is electrically connected to multiple battery rows 21 in the battery module 20.

[0099] Optionally, when there is only one power distribution unit 32 and one transfer unit 33, multiple battery banks 21 are electrically connected to the power distribution unit 32 and the high voltage unit 31. In other embodiments, when there are multiple power distribution units 32 and multiple transfer units 33, each battery bank 21 is electrically connected to at least one power distribution unit 32 and a high voltage unit 31. The configuration can adopt any feasible connection method in the art, and there is no specific limitation.

[0100] By arranging the power distribution unit 32, the transfer unit 33, and the high-voltage unit 31 at intervals in the first direction X, the space below the battery module 20 can be fully utilized, improving space utilization. At the same time, it can reduce the interference between each electronic control unit (for example, it can reduce the electromagnetic interference of the high-voltage box 311 to the power distribution unit 32 and the transfer unit 33), and it is also conducive to accurate fault location and convenient for later maintenance.

[0101] In one embodiment, in two adjacent battery columns 21, at least one battery column 21 is provided with a high-voltage unit 31 below it, and the other battery column 21 is provided with a power distribution unit 32 or a transfer unit 33 below it.

[0102] Since the battery row 21 above the high-voltage unit 31 and an adjacent battery row 21 are electrically connected to the two high-voltage boxes 311 in the high-voltage unit 31, the power distribution unit 32 or the transfer unit 33 can be configured in the space below the adjacent battery row 21, thereby improving space utilization.

[0103] It is important to note that in two adjacent battery columns 21, either one battery column 21 may have a high-voltage unit 31 located below it, or both battery columns 21 may have a high-voltage unit 31 located below it. In this case, the high-voltage unit 31 below each battery column 21 is electrically connected to other battery columns 21 on the side furthest from the other battery column 21, avoiding redundant connections. Furthermore, compared to the case where neither of the two adjacent battery columns 21 has a high-voltage unit 31 located below it, this configuration results in shorter connection paths between each high-voltage box 311 and the battery column 21, simplifying the internal wiring of the energy storage device 100 and reducing system complexity.

[0104] In one implementation, such as Figure 1 As shown, in the first direction X, the size of the battery array 21 is D1, the size of the power distribution unit 32 is D3, and the size of the transfer unit 33 is D4, satisfying: 0.8≤D3 / D1≤1.2, 0.8≤D4 / D1≤1.2. By satisfying D3 / D1 and D4 / D1 within the above ranges, the power distribution unit 32 and the transfer unit 33, while meeting the electrical control requirements, can fully utilize the space below the battery module 20 in the first direction X, improving space utilization, and simultaneously avoiding interference with the high-voltage unit 31.

[0105] When the dimensions of D3 / D1 are too small, the size of the power distribution unit 32 in the first direction X is too small. To ensure the requirements of electrical control, its size in other directions (such as the second direction Z) will increase, increasing the space occupied by the power distribution unit 32 in other directions, thus affecting the layout of the battery module 20. When the dimensions of D2 / D1 are too large, the space occupied by the power distribution unit 32 in the first direction X is too large, which may interfere with the high-voltage unit 31 or the transfer unit 33, and it is also easy to collide with other structures during transportation and use. Optionally, the specific values ​​of D3 / D1 can be 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15, or 1.2.

[0106] Similarly, the settings for D4 / D1 are similar to those for D3 / D1, as described above, and will not be repeated here. Optionally, the values ​​for D3 and D4 can be the same or slightly different; there are no specific restrictions.

[0107] In one implementation, such as Figure 4 As shown, the electronic control module 30 also includes an electrical connector 34, which is electrically connected to the electronic control module 30. The electrical connector 34 has multiple connection positions 341. Each battery pack 211 includes a connector, and the connectors of the multiple battery packs 211 are electrically connected to the multiple connection positions 341 in a one-to-one correspondence.

[0108] The electrical connector 34 may adopt any feasible structure in the art that can realize current transmission, including but not limited to copper busbars, connecting pieces, etc., without any specific limitation. Optionally, multiple battery packs 211 in each battery column 21 may be electrically connected to one electrical connector 34, or all battery packs 211 in the battery module 20 may be electrically connected to one electrical connector 34. There is no specific limitation.

[0109] Optionally, the connectors for the battery pack 211 can be wire harnesses, connector terminals, connector plates, etc., without limitation. The connection position 341 can be provided with protrusions, grooves, or holes, without limitation.

[0110] With this configuration, the current from multiple battery packs 211 can be combined or distributed through the electrical connector 34, thereby enabling power transmission for the energy storage device.

[0111] In one embodiment, the electrical connector 34 is a copper busbar, and multiple connection positions 341 are staggered on the electrical connector 34.

[0112] Optionally, the electrical connector 34 can be generally square, rectangular, trapezoidal, irregular in shape, etc., without limitation. Understandably, multiple connection positions 341 can be arranged in an array on the electrical connector 34, or multiple connection positions 341 can extend along any one or a combination of straight lines, broken lines, or curves.

[0113] In one specific implementation, such as Figure 4 As shown, multiple connection positions 341 are arranged sequentially and spaced apart along the fold line on the electrical connector 34. This arrangement allows for more connection positions 341 to be spaced apart on the same area of ​​copper busbar compared to a straight line arrangement. This reduces the area of ​​the copper busbar while connecting the same number of battery packs 211, achieving denser busbar current collection.

[0114] In one embodiment, there are multiple electrical connectors 34, and each of the high-voltage unit 31, the power distribution unit 32, and the transfer unit 33 is provided with an electrical connector 34.

[0115] By employing an electrical connector 34 that enables denser current convergence, the volume of the electrical connector 34 is reduced when connecting the same number of battery packs 211. This facilitates the reduction of the size of the high-voltage unit 31, the power distribution unit 32, and the transfer unit 33, thereby increasing the power capacity and energy density of the energy storage device 100.

[0116] In one implementation, such as Figure 1As shown, in the first direction X, the size of the battery array 21 is D1, and the size of the thermal management module 40 is D5, satisfying: 1230mm≤D1≤1400mm, 380mm≤D5≤420mm. Meeting the above ranges for D1 and D5 increases the space ratio of the battery module 20 within the housing 10 in the first direction X, allowing the energy storage device 100 to have a higher capacity in the same volume and a higher area energy density for the same capacity. When the value of D1 is too large and the value of D2 is too small, the space on one side of the battery module 20 in the first direction X may not be sufficient to accommodate the thermal management module 40. Since the size of the battery array 21 in the first direction X is limited and cannot be adjusted to any value, the space in the housing 10 in the first direction X cannot be effectively utilized by multiple battery arrays 21, potentially resulting in wasted space. When the value of D1 is too small and the value of D5 is too large, the size of the battery array 21 in the first direction X cannot be effectively increased to achieve a higher capacity.

[0117] This configuration allows the dimensions of the battery module 20 in the first direction X to be adjusted to within the length range of a standard 20-foot container (6058mm), meeting the transportation requirements of standardized containers.

[0118] Optionally, the specific values ​​for D1 can be 1230mm, 1250mm, 1280mm, 1300mm, 1310mm, 1330mm, 1350mm, 1380mm, or 1400mm. Optionally, the specific values ​​for D5 can be 380mm, 385mm, 390mm, 395mm, 400mm, 405mm, 410mm, 415mm, or 420mm.

[0119] Correspondingly, the specific values ​​for D2 can be 650mm, 655mm, 660mm, 665mm, 670mm, 675mm, and 680mm. The specific values ​​for D3 and D4 can be 1200mm, 1250mm, 1280mm, 1300mm, 1310mm, 1330mm, 1350mm, 1380mm, 1400mm, and 1430mm.

[0120] In one implementation, such as Figure 3 As shown, each battery pack 211 includes multiple battery cells 212, which are arranged in an array of M rows and N columns, where M ≥ 2 and M is a positive integer, and N ≥ 2 and N is a positive integer. The larger face of each battery cell 212 faces the first direction; where the row direction is the third direction Y and the column direction is the first direction X.

[0121] Optionally, the spacing between any two adjacent cells 212 in the row direction is the same as the spacing between any two adjacent cells 212 in the column direction, so as to simplify the assembly of multiple cells 212 and at the same time improve the energy density of the battery pack 211.

[0122] In another embodiment, the spacing between any two adjacent cells 212 in the row direction is different from the spacing between any two adjacent cells 212 in the column direction, so that the battery pack 211 can flexibly adjust the arrangement spacing of multiple cells 212 in different directions according to factors such as heat dissipation requirements and mechanical loads, thereby improving the adaptability of the battery pack 211.

[0123] In a specific implementation, to simplify the series connection of multiple battery cells 212 under different quantities and array arrangements, the series connection method between the multiple battery cells 212 is as follows: The M cells 212 in the first column are connected in series along the third direction, and the second cell 212 to the Mth cell 212 in any column from the second to the Nth column are connected in series. The first cell 212 in column g is connected in series with the first cell 212 in column g+1, and the Mth cell 212 in column g is connected in series with the Mth cell 212 in column g+1. g is an odd number and 1≤g≤N-1. The first cell 212 in the i-th column is connected in series with the first cell 212 in the (i+1)-th column, and the second cell 212 in the i-th column is connected in series with the second cell 212 in the (i+1)-th column, where i is an even number and 2≤i≤N-1.

[0124] By setting the connection method between the multiple cells 212, a continuous, branchless and regular series circuit between the multiple cells 212 is realized. The connection method with high regularity and symmetry is set between the first column, the odd column and the even column, which is beneficial to realize the modular assembly between the multiple cells 212 of the battery pack 211.

[0125] Optionally, the energy unit is a standardized-size cell 212. A standardized-size cell 212 is defined as a cell 212 with a preset capacity and whose width, thickness, and height meet the preset dimensions. For example, a standardized-size cell 212 has a capacity of 588 Ah and dimensions of 73 mm (thickness) × 288 mm (width) × 214 mm (height); or, a standardized-size cell 212 has a capacity of 660 Ah and dimensions of 73 mm (thickness) × 319 mm (width) × 214 mm (height); or, a standardized-size cell 212 has a capacity of 648 Ah and dimensions of 72 mm (thickness) × 352 mm (width) × 205 mm (height), and so on, without any specific limitations.

[0126] In this embodiment of the application, the thickness of the battery cell 212 is the dimension of the battery cell 212 in the first direction X, the width of the battery cell 212 is the dimension of the battery cell 212 in the third direction Y, and the height of the battery cell 212 is the dimension of the battery cell 212 in the second direction Z.

[0127] In the embodiments of this application, for the standardized size of the battery cell 212 of various sizes, the size within the range of ±1%, ±2%, ±3%, ±4%, and ±5% can be regarded as the size within the tolerance range.

[0128] In some other embodiments, the standardized size of the battery cell 212 may also adopt any other feasible preset capacity and preset size, without any specific limitation.

[0129] With this configuration, compared to the configuration where the large surface of the cell 212 faces the third direction Y (i.e., the large surface of the cell 212 faces the length direction of the battery pack 211), the battery pack 211 in this embodiment can reduce its size in the width direction (i.e., the first direction X), and has a higher energy density in the same volume, while having a smaller volume while meeting the same energy density, which meets the installation requirements of the housing 10.

[0130] In one implementation, such as Figure 1 As shown, there are 4 battery rows 21, and each battery row 21 includes 8 battery packs 211 arranged sequentially in the second direction Z.

[0131] Optionally, multiple battery packs 211 can be directly stacked; or, two adjacent battery packs 211 in each battery column 21 have a gap in the second direction Z; or, at least two battery packs 211 in multiple battery packs 211 can be directly stacked in the second direction Z. All of the above methods are acceptable and there is no specific restriction.

[0132] In one implementation, such as Figure 1 As shown, a fire protection module 50 is also provided above the battery module 20. The size of the electrical control module 30 in the second direction Z is h1, and the size of the fire protection module 50 in the second direction Z is h2, satisfying: 250mm≤h1≤350mm, 250mm≤h2≤300mm.

[0133] The fire protection module 50 is used to control the activation of fire protection components when the internal temperature of the energy storage device 100 becomes unbalanced or a fire occurs. The fire protection components can be fire extinguishers, etc., and can be installed inside the energy storage device 100. Optionally, the power distribution unit 32 is also electrically connected to the fire protection module 50 to facilitate the normal operation of the fire control module.

[0134] Since the dimensions of the housing 10 are preset, after configuring the battery module 20 and the electronic control module 30, there is still some space above the battery module 20. This space is insufficient to add another battery pack 211. In this case, placing the fire-fighting module 50 above the battery module 20 can make full use of the empty space above the battery module 20 and improve the internal space utilization of the energy storage device 100.

[0135] Optionally, the dimension h1 of the electronic control module 30 in the second direction Z can be the maximum dimension of the electronic control module 30 in the second direction Z. The dimensions of the high-voltage unit 31, the power distribution unit 32, and the conversion unit in the second direction Z can be the same or different, without restriction.

[0136] Optionally, the value of h1 can be 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, or 350mm. Optionally, the value of h2 can be 250mm, 260mm, 270mm, 280mm, 290mm, or 300mm.

[0137] In one implementation, such as Figure 1 As shown, in the first direction X, the spacing between two adjacent battery rows 21 is configured as f, satisfying: 50mm ≤ f ≤ 120mm. Optionally, this spacing can be used to place support columns and cluster frames. Satisfying f within the above range ensures the strength of the support structure without occupying excessive space, thus increasing the space ratio of the battery modules 20 within the housing 10. When the value of f is too large, the spacing occupies too much space; when the value of f is too small, the spacing is insufficient, potentially resulting in insufficient structural strength of the support structure and inability to provide effective support for the battery rows 21. Optionally, the specific value of f can be 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, or 120mm.

[0138] Optionally, among the multiple battery columns 21, the size of the interval f between two adjacent battery columns 21 in the first direction X can be the same or different, without restriction.

[0139] In one implementation, such as Figure 1 As shown, in each battery row 21, the distance between two adjacent battery packs 211 in the second direction is h3, satisfying: 14mm ≤ h3 ≤ 17mm. This ensures that when the height of each battery row 21 is relatively small, there is sufficient clearance between adjacent battery packs 211 for wire harness passage or heat dissipation. Optionally, the distance between two adjacent battery packs 211 can be the height of the cluster frame disposed between the two adjacent battery packs 211.

[0140] In one embodiment, the size of the electronic control module 30 in the third direction Y is w1, and the size of the thermal management module 40 in the third direction Y is w2, satisfying: w1≤2233mm, w2≤2233mm. With this setting, when applied to a standardized enclosure, the electronic control module 30 and the thermal management module 40 can be smoothly installed inside the enclosure 10, avoiding interference between the electronic control module 30 and the thermal management module 40 and the enclosure 10.

[0141] Optionally, the dimensions of the electronic control module 30 in the third-direction Y direction can be the same as or different from the dimensions of the thermal management module 40 in the third-direction Y direction, without any restriction.

[0142] In one embodiment, the battery module 20 has a dimension T1 in the first direction X, the electronic control module 30 has a dimension T2 in the first direction X, the thermal management module 40 has a dimension T3 in the first direction X, and the fire protection module 50 has a dimension T4 in the first direction X, satisfying the following conditions: T1≤5858mm, T2≤5858mm, T3≤5858mm, T4≤5858mm. With this configuration, the dimensions of the battery module 20, electronic control module 30, thermal management module 40, and fire protection module 50 in the first direction X all meet the requirements of the standardized housing 10, facilitating transportation.

[0143] In one implementation, such as Figure 3 As shown, multiple battery cells 212 are arranged in an array of 16 rows and 6 columns. The battery cells 212 are of standardized size and have a capacity of A, which satisfies the following condition: 588 Ah ≤ A ≤ 660 Ah.

[0144] Optionally, each battery pack 211 includes 6 battery modules arranged sequentially in the third direction Y, and each battery module includes 16 standardized-size cells 212 arranged sequentially in the first direction X.

[0145] Optionally, the specific values ​​of A can be 588 Ah, 600 Ah, 610 Ah, 620 Ah, 630 Ah, 640 Ah, 648 Ah, 650 Ah, or 660 Ah.

[0146] With this configuration, the battery cells 212 in the battery pack 211 are grouped in a 96S configuration, which reduces the size of the battery pack 211 in the first direction X, so that the size of the battery pack 211 in the first direction X, W1, is adjusted to about 1250mm.

[0147] In one embodiment, the battery pack 211 has a charge of E1, a dimension of W1 in the first direction X, a dimension of H1 in the second direction Z, and a dimension of L1 in the third direction Y, satisfying: 588 Ah ≤ A ≤ 660 Ah, 195 kWh ≤ E1 ≤ 220 kWh; 1200 mm ≤ W1 ≤ 1400 mm, 240 mm ≤ H1 ≤ 280 mm, and 2000 mm ≤ L1 ≤ 2300 mm.

[0148] Optionally, E1 can be 195kWh, 198kWh, 200kWh, 205kWh, 208kWh, 210kWh, 213kWh, 215kWh, 218kWh, or 220kWh. Optionally, W1 can be 1200mm, 1250mm, 1300mm, 1350mm, or 1400mm. Optionally, H1 can be 240mm, 245mm, 250mm, 255mm, 260mm, 265mm, 270mm, 275mm, or 280mm. Optionally, L1 can be 2000mm, 2050mm, 2100mm, 2150mm, 2200mm, 2250mm, or 2300mm.

[0149] In one specific implementation, the following conditions are met: A=660Ah, W1=1369mm, H1=255mm, and L1 is not limited.

[0150] Alternatively, in another specific implementation, the following conditions are met: A=588Ah, W1=1242mm, H1=255mm, and L1 is not limited.

[0151] By setting the battery pack 211's capacity E1, its dimensions W1 in the first direction X, H1 in the second direction Z, and L1 in the third direction Y to all satisfy the above ranges, and by adjusting the arrangement of the cells 212 within the battery pack 211, the capacity of the battery pack 211 can be increased within the same volume, and the volume of the battery pack 211 can be reduced under the premise of the same capacity, thereby increasing the energy density of the battery pack 211 and thus increasing the energy density of the energy storage device 100.

[0152] In one embodiment, the energy storage device 100 has a power capacity of E2, the housing 10 has a dimension of a in the first direction X and a dimension of b in the third direction Y, satisfying: 6.26 MWh ≤ E2 ≤ 7.10 MWh, and / or 420 KW / m 2 ≤E2 / (a×b) ≤500KW / m 2 .

[0153] Optionally, the specific values ​​of E2 can be 6.26MWh, 6.27MWh, 6.28MWh, 6.32MWh, 6.35MWh, 6.42MWh, 6.48MWh, 6.55MWh, 6.62MWh, 6.68MWh, 6.7MWh, 6.75MWh, 6.8MWh, 6.85MWh, 6.9MWh, 6.99MWh, 7.01MWh, 7.03MWh, 7.08MWh, and 7.1MWh. Optionally, the specific value of E2 / (a×b) can be 420KW / m. 2 425KW / m 2 430KW / m 2 440KW / m 2 450KW / m 2 455KW / m 2 460KW / m 2 465KW / m 2 470KW / m 2 475KW / m 2 480KW / m 2 485KW / m 2 490KW / m 2 495KW / m 2 500KW / m 2 .

[0154] In one implementation, A = 660 Ah, and satisfies: 219 kWh ≤ E1 ≤ 220 kWh, 6.9 MWh ≤ E2 ≤ 7.1 kWh, 475.6 kW / m³ 2 ≤E2 / (a×b) ≤476KW / m 2 .

[0155] Understandably, E2 / (a×b) represents the area energy density of the energy storage device 100. In a specific implementation, the following conditions are met: A = 660 Ah, E1 = 219.6 kWh, E2 = 7.028 MWh, E2 / (a×b) = 475.85 kW / m² 2 .

[0156] Alternatively, in another specific implementation, A = 588 Ah, satisfying: 195 kWh ≤ E1 ≤ 196 kWh, 6.26 MWh ≤ E2 ≤ 6.27 kWh, 423.8 kW / m³ 2 ≤E2 / (a×b) ≤424.5KW / m 2 .

[0157] Alternatively, in another specific implementation, A = 648 Ah, satisfying: 215 kWh ≤ E1 ≤ 216 kWh, 6.89 MWh ≤ E2 ≤ 6.91 kWh, 408.2 kW / m³ 2 ≤E2 / (a×b) ≤408.8KW / m 2 .

[0158] Alternatively, the energy storage device 100 may also use other feasible standard-sized cells 212, as long as their arrangement meets the area energy density requirements of the energy storage device 100. The embodiments of this application do not impose specific restrictions on this.

[0159] This configuration ensures that the area energy density of the energy storage device 100 is increased under the same power capacity. While increasing the maximum power capacity that the energy storage device 100 can achieve, the area occupied by the energy storage device 100 is controlled, making it easier to transport.

[0160] In this embodiment of the energy storage device 100, by adjusting the electronic control module 30 to be entirely located below the battery module 20, the space ratio of the electronic control module 30 within the housing 10 in the first direction X is reduced, and the proportion of the battery module 20 is increased. This allows for an increase in the size of the battery array 21 in the first direction or an increase in the number of battery arrays 21. Specifically, the adjustment method is to reduce the size of each electronic control unit of the electronic control module in the first direction X. Furthermore, by adjusting the arrangement direction of multiple cells 212 within the battery pack 211, with the large facet of the cells 212 facing the first direction X, and the grouping method of the cells 212 adjusted to 96S, the size of the battery pack 211 in the first direction X is reduced from 1550mm to approximately 1250mm. This allows four battery rows to be arranged sequentially along the first direction X within the housing 10, reducing the size of the battery module 20 in the first direction X to within 5858mm, meeting the size requirements of the standardized housing. This achieves a capacity of 6.9MWh for the energy storage device 100 under a standard 20-foot container, compared to the 6.37 MWh capacity of the energy storage device 100 under a standard 20-foot container in the prior art. This increases the total capacity of the energy storage device 100 within the same size, thereby improving the energy density of the energy storage device 100.

[0161] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing 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, and therefore should not be construed as a limitation of this application.

[0162] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. An energy storage device (100) characterized by, include: Box (10); A battery module (20) is housed in the housing (10). The battery module (20) includes multiple battery columns (21), which are arranged sequentially along a first direction. Each battery column (21) includes multiple battery packs (211), which are arranged sequentially along a second direction. An electronic control module (30) is housed in the housing (10) and disposed below the battery module (20). The electronic control module (30) includes a high-voltage unit (31). The high-voltage unit (31) is disposed below at least one of the battery rows (21), and the battery rows (21) above the high-voltage unit (31) and an adjacent battery row (21) are electrically connected to the high-voltage unit (31). A thermal management module (40) is housed in the housing (10) and disposed on one side of the battery module (20) in the first direction; Wherein, the first direction is the length direction of the box (10), and the second direction is the height direction of the box (10).

2. The energy storage device (100) according to claim 1, characterized in that The enclosure (10) is a standardized enclosure; By placing the high-voltage unit (31) below the battery array (21) and electrically connecting it to the battery array (21) above and an adjacent battery array (21), the electronic control module (30), which was originally located on one side of the battery module (20) in the first direction, is moved to the battery array (21) adjacent to the high-voltage unit (31). This increases the space of the housing (10) in the first direction, excluding the thermal management module (40), thereby providing more space for the battery module (20) to increase the size of the battery array (21) in the first direction or to increase the number of battery arrays (21).

3. The energy storage device (100) according to claim 1, characterized in that In the first direction, the high-voltage unit (31) is spaced apart from the adjacent battery array (21).

4. The energy storage device (100) according to claim 1, characterized in that In the first direction, the size of the battery array (21) is D1 and the size of the high voltage unit (31) is D2, satisfying: 0.8≤D2 / D1≤1.

2.

5. The energy storage device (100) of claim 1, wherein, The high-voltage unit (31) includes two high-voltage boxes (311) arranged sequentially along the first direction. The battery array (21) above the high-voltage unit (31) and an adjacent battery array (21) are respectively electrically connected to one of the high-voltage boxes (311).

6. The energy storage device (100) according to claim 5, characterized in that The high-voltage unit (31) further includes a separator (312), which is disposed between the two high-voltage boxes (311) in the first direction.

7. The energy storage device (100) according to claim 5, characterized in that In the first direction, the size of the battery array (21) is D1, and the size of the high voltage box (311) is d, satisfying: 0.4≤d / D1≤0.

55.

8. The energy storage device (100) of claim 1, wherein, The electric control module (30) further comprises a power distribution unit (32) and a switching unit (33), the high-voltage unit (31), the power distribution unit (32) and the switching unit (33) are arranged in a first direction, and the power distribution unit (32) and the switching unit (33) are arranged below different battery columns (21) respectively.

9. The energy storage device (100) according to claim 8, characterized in that The power distribution unit (32) comprises a power distribution box (321) and a UPS box (322) arranged in the first direction, and the power distribution box (321) and the UPS box (322) are electrically connected with a plurality of battery columns.

10. The energy storage device (100) according to claim 8, characterized in that Among the two adjacent battery columns (21), at least one battery column (21) is arranged below the high-voltage unit (31), and the other battery column (21) is arranged below the power distribution unit (32) or the switching unit (33).

11. The energy storage device (100) according to claim 8, characterized in that In the first direction, the size of the battery column (21) is D1, the size of the power distribution unit (32) is D3, and the size of the switching unit (33) is D4, which satisfies: 0.8≤D3 / D1≤1.2, 0.8≤D4 / D1≤1.

2.

12. The energy storage device (100) according to claim 8, characterized in that The electric control module (30) further comprises an electric connector (34) electrically connected with the electric control module (30), the electric connector (34) has a plurality of connection positions (341), each battery pack (211) comprises a connector, and the connectors of a plurality of battery packs (211) are electrically connected with a plurality of connection positions (341) one by one.

13. The energy storage device (100) according to claim 12, characterized in that The electric connector (34) is a copper bar, and a plurality of connection positions (341) are arranged on the electric connector (34) in a staggered manner.

14. The energy storage device (100) according to claim 13, characterized in that The electric connector (34) is a plurality of, the high-voltage unit (31), the power distribution unit (32) and the switching unit (33) are arranged correspondingly.

15. The energy storage device (100) according to any one of claims 1 to 14, characterized in that In the first direction, the size of the battery column (21) is D1, and the size of the thermal management module (40) is D5, which satisfies: 1230mm≤D1≤1400mm, 380mm≤D5≤420mm.

16. The energy storage device (100) according to any one of claims 1 to 14, characterized in that The battery column (20) further comprises a cluster frame, and the cluster frame is accommodated in the box body (10), and a plurality of battery packs (211) in each battery column (20) are mounted on the cluster frame.

17. The energy storage device (100) according to claim 16, characterized in that The energy storage device (100) further comprises a plurality of support columns, a plurality of support columns are arranged in the first direction, and the battery column (21) is arranged between adjacent support columns, and the cluster frame is connected with adjacent support columns.

18. The energy storage device (100) according to claim 16, characterized in that The energy storage device (100) further comprises a heat exchange pipeline, the heat exchange pipeline is mounted on the cluster frame and communicates the thermal management module (40) with a plurality of battery packs (211).

19. The energy storage device (100) according to any one of claims 1 to 14, characterized in that Each battery pack (211) comprises a plurality of battery cells (212), a plurality of battery cells (212) are arranged in an array of M rows and N columns, M≥2 and M is a positive integer, N≥2 and N is a positive integer, and each battery cell (212) has a large surface facing the first direction. The row direction is the third direction, the column direction is the first direction, and the third direction is the width direction of the box (10).

20. The energy storage device (100) according to claim 19, characterized by The M battery cells (212) in the first column are connected in series along the third direction, and the second battery cell (212) to the Mth battery cell (212) in any one of the second column to the Nth column are connected in series. The first battery cell (212) in the gth column is connected in series with the first battery cell (212) in the g+1th column, and the Mth battery cell (212) in the gth column is connected in series with the Mth battery cell (212) in the g+1th column, where g is an odd number and 1≤g≤N-1. The first battery cell (212) in the ith column is connected in series with the first battery cell (212) in the i+1th column, and the second battery cell (212) in the ith column is connected in series with the second battery cell (212) in the i+1th column, where i is an even number and 2≤i≤N-1.

21. The energy storage device (100) according to claim 19, characterized by The box (10) is a standardized box, the size of the box (10) in the first direction is a, the size of the box (10) in the third direction is b, and the size of the box (10) in the second direction is c, which satisfy: 6052mm≤a≤6064mm, 2433mm≤b≤2443mm, 2571mm≤c≤2891mm.

22. The energy storage device (100) according to claim 21, characterized by The battery module (20) further comprises a fire-fighting module (50), and the size of the electronic control module (30) in the second direction is h1, the size of the fire-fighting module (50) in the second direction is h2, which satisfy: 250mm≤h1≤350mm, 250mm≤h2≤300mm.

23. The energy storage device (100) according to claim 22, characterized by The distance between the two adjacent battery columns (21) in the first direction is f, which satisfies: 50mm≤f≤120mm.

24. The energy storage device (100) according to claim 22, characterized by In each battery column (21), the distance between the two adjacent battery packs (211) in the second direction is h3, which satisfies: 14mm≤h3≤17mm.

25. The energy storage device (100) of claim 22, wherein, The size of the electronic control module (30) in the third direction is w1, and the size of the thermal management module (40) in the third direction is w2, which satisfy: w1≤2233mm, w2≤2233mm.

26. The energy storage device (100) of claim 22, wherein, The size of the battery module (20) in the first direction is T1, the size of the electronic control module (30) in the first direction is T2, the size of the thermal management module (40) in the first direction is T3, and the size of the fire-fighting module (50) in the first direction is T4, which satisfy: T1≤5858mm, T2≤5858mm, T3≤5858mm, T4≤5858mm.

27. The energy storage device (100) of claim 22, wherein, The plurality of battery cells (212) are arranged in a 16-row and 6-column array, the battery cells (212) are standardized size battery cells, and the capacity of the battery cells (212) is A, which satisfies: 588Ah≤A≤660 Ah.

28. The energy storage device (100) of claim 23, wherein, ​ 29. The energy storage device (100) according to claim 28, characterized by The battery pack (211) has an electric quantity E1, a size W1 in the first direction, a size H1 in the second direction, and a size L1 in the third direction, and satisfies: 195 kWh ≤ E1 ≤ 220 kWh; 1200 mm ≤ W1 ≤ 1400 mm, 240 mm ≤ H1 ≤ 280 mm, 2000 mm ≤ L1 ≤ 2300 mm.

30. The energy storage device (100) according to claim 29, characterized by The energy storage device (100) has an electric quantity E2, which satisfies: 6.26 MWh≤E2≤7.10 MWh, and / or, 420KW / m 2 ≤E2 / (a×b)≤500KW / m 2 .

31. The energy storage device (100) of claim 30, wherein: A = 660 Ah, satisfying: 219 kWh ≤ E1≤ 220 kWh, 6.9 MWh ≤ E2≤ 7.1 kWh, 475.6 KW / m 2 ≤ E2 / (a x b) ≤ 476 KW / m 2 .

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