Energy storage system and integrated cabinet thereof

Abstract

An energy storage system (1) and an integrated cabinet (20) thereof. The energy storage system (1) comprises an integrated cabinet (20) and at least one energy storage cabinet (10); the energy storage cabinet (10) comprises battery cells (12); the energy storage cabinet (10) comprises a first high-voltage interface (111), a first low-voltage interface (112), and a fluid pipe interface (113); the integrated cabinet (20) comprises a high-voltage unit (22), a low-voltage unit (23), and a thermal management unit (24); the integrated cabinet (20) comprises a second high-voltage interface (211), a second low-voltage interface (212), and a thermal management unit interface (213); the second high-voltage interface (211) of the integrated cabinet (20) is connected to the first high-voltage interface (111) of the at least one energy storage cabinet (10); the second low-voltage interface (212) of the integrated cabinet (20) is connected to the first low-voltage interface (112) of the at least one energy storage cabinet (10); and the fluid pipe interface (113) of the integrated cabinet (20) is connected to the thermal management unit interface (213) of the at least one energy storage cabinet (10). In the energy storage system (1), the battery cells (12) are arranged in the energy storage cabinet (10), such that the thermal effect of the battery cells (12) on the high-voltage unit (22), the low-voltage unit (23), and the thermal management unit (24) is reduced, thereby improving the operating stability of the energy storage system (1).

Description

Energy storage system and integrated cabinet thereof

[0001] This application claims priority to International Patent Application No. PCT / CN2024 / 086624 entitled "Energy Storage Container" filed on April 8, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of energy storage devices, and more particularly to an energy storage system and an integrated cabinet thereof. BACKGROUND

[0003] With the continuous development of new energy technology, more and more energy storage systems are connected to the power grid. By connecting the energy storage system to the power grid, the random and fluctuating energy of renewable energy systems such as wind power and photovoltaic power can be smoothly transmitted to the power grid, which can reduce the impact of power fluctuations of renewable energy systems on the power grid and improve the stability and reliability of the power grid.

[0004] In a container-type energy storage system, a battery module is usually provided, and a plurality of function modules matched with the battery module, such as a control module and a power distribution module, are also installed. Since a large amount of heat is generated during the use of the battery module, the control module and the power distribution module will be disturbed by the heat, affecting the stability of the energy storage system.

[0005] SUMMARY

[0006] In a first aspect, an energy storage cabinet is provided, comprising:

[0007] At least one energy storage cabinet, the energy storage cabinet being provided with a battery unit, the energy storage cabinet comprising a first high-voltage interface, a first low-voltage interface, and a fluid pipeline interface;

[0008] An integrated cabinet, the integrated cabinet being provided with a high-voltage unit, a low-voltage unit, and a thermal management unit, the integrated cabinet comprising a second high-voltage interface, a second low-voltage interface, and a thermal management unit interface;

[0009] The second high-voltage interface of the integrated cabinet is connected to the first high-voltage interface of the at least one energy storage cabinet, the second low-voltage interface of the integrated cabinet is connected to the first low-voltage interface of the at least one energy storage cabinet, and the thermal management unit interface of the integrated cabinet is connected to the fluid pipeline interface of the at least one energy storage cabinet.

[0010] In the energy storage system provided in the embodiments of the present application, the battery unit is arranged in the energy storage cabinet, and the high-voltage unit, the low-voltage unit and the thermal management unit are arranged in the integrated cabinet, so that the distance between the high-voltage unit and the battery unit, the distance between the low-voltage unit and the battery unit and the distance between the thermal management unit and the battery unit are all increased, so that the high-voltage unit, the low-voltage unit and the thermal management unit are less affected by the heat interference in the use process of the battery unit, thereby improving the stability of the integrated cabinet and further improving the stability of the energy storage system.

[0011] In a possible design, the single energy storage cabinet includes at least 2 battery clusters, two or more energy storage cabinets can be accommodated in a standard container, and / or the total mass of the two or more energy storage cabinets is less than or equal to 36000 kg.

[0012] In this arrangement, two or more energy storage cabinets can be accommodated in a standard container, so that two or more energy storage cabinets can be transported in a standard container during transportation, facilitating transfer during transportation. The total mass of the two or more energy storage cabinets is less than or equal to 36000 kg, so that the two or more energy storage cabinets accommodated in the standard container meet the standard requirements of the maximum total mass of the standard container.

[0013] In a possible design, the energy storage cabinet further includes a DC / DC converter, and the DC / DC converter is connected to the battery unit and the high-voltage unit respectively.

[0014] In this arrangement, the DC / DC converter is used to adjust the output voltage of the battery unit and improve the voltage stability.

[0015] In a possible design, one integrated cabinet is arranged in correspondence with N energy storage cabinets, and 2≤N≤8.

[0016] In this arrangement, one integrated cabinet is matched with multiple energy storage cabinets, thereby improving the utilization rate of the high-voltage unit, the low-voltage unit and the thermal management unit in the integrated cabinet.

[0017] In a possible design, the thermal management unit includes a water cooling unit, and the fluid pipeline interface of the energy storage cabinet is arranged to be connected to the thermal management unit, so that the thermal management unit performs thermal management on the battery unit.

[0018] In this arrangement, the water cooling unit is used to improve the temperature control of the thermal management unit, thereby improving the temperature control of the battery unit, facilitating maintaining the battery unit at a relatively more suitable working temperature and prolonging the service life of the battery unit.

[0019] In a possible design, the high-voltage unit at least includes a master control box, and the first high-voltage interface of the energy storage cabinet is configured to be connected with the second high-voltage interface, so that the high-voltage unit controls the battery unit in high-voltage electrical control.

[0020] In this arrangement, the master control box is arranged in the integrated cabinet, thereby improving the space utilization of the energy storage cabinet and facilitating the improvement of the volume energy density of the energy storage cabinet.

[0021] In a possible design, the master control box at least includes one or more of a DC bus, a DC disconnector, a high-voltage relay, a protection fuse, and a current sensor.

[0022] In this arrangement, one or more of the DC bus, the DC disconnector, the high-voltage relay, the protection fuse, and the current sensor are integrated in the master control box, thereby simplifying the wiring and installation of the plurality of components, reducing the maintenance difficulty, and improving the maintenance efficiency.

[0023] In a possible design, the high-voltage unit further at least includes an energy storage converter or a step-up transformer.

[0024] In this arrangement, the energy storage converter or the step-up transformer is integrated in the high-voltage unit, thereby increasing the integration degree of the integrated cabinet and improving the internal space utilization of the cabinet of the energy storage cabinet.

[0025] In a possible design, the low-voltage unit at least includes a low-voltage power distribution module and a control component part, and the first low-voltage interface of the energy storage cabinet is configured to be connected with the second low-voltage interface, so that the low-voltage power distribution module and the control component part control the battery unit in low-voltage electrical control.

[0026] In this arrangement, the low-voltage power distribution module and the control component part are integrated in the low-voltage unit, thereby increasing the integration degree of the integrated cabinet and improving the internal space utilization of the cabinet of the energy storage cabinet.

[0027] In a possible design, the low-voltage power distribution module at least includes one or more of a molded case circuit breaker, a miniature circuit breaker, a 24V power module, a UPS backup power, and an emergency stop button component.

[0028] In this arrangement, one or more of the molded case circuit breaker, the miniature circuit breaker, the 24V power module, the UPS backup power, and the emergency stop button component are integrated in the low-voltage power distribution module of the low-voltage unit, thereby simplifying the wiring and installation of the plurality of components, reducing the maintenance difficulty, and improving the maintenance efficiency.

[0029] In a possible design, the control component part at least includes one or more of a master battery management unit, a fire control module, an Ethernet unit, an optical fiber conversion module, an energy storage converter controller, and an energy management module.

[0030] In this setting, one or more components of the main battery management unit, fire control, Ethernet unit, fiber optic conversion module, energy storage inverter controller, and energy management module are integrated into the control component part of the low-voltage unit, which can simplify the wiring and installation of multiple components, reduce maintenance difficulty, and improve maintenance efficiency.

[0031] In one possible design, the low-voltage unit and the thermal management unit are arranged on both sides of the high-voltage unit.

[0032] In this configuration, the high-voltage unit and the thermal management unit are relatively far apart, which reduces interference between the high-voltage unit and the thermal management unit and improves the stability of the integrated cabinet.

[0033] In a possible design, a first isolation structure is provided between the high-voltage unit and the low-voltage unit, and / or a second isolation structure is provided between the low-voltage unit and the thermal management unit.

[0034] In this setting, the first isolation structure can reduce the interference between the high-voltage unit and the low-voltage unit, and the second isolation structure can reduce the interference between the thermal management unit and the low-voltage unit. Both the first isolation structure and the second isolation structure can improve the stability of the integrated cabinet.

[0035] In a possible design, a single or multiple integrated cabinets can be accommodated in a standard container, and / or the total mass of the single or multiple integrated cabinets is less than or equal to 36,000 kg.

[0036] In this configuration, one or more integrated cabinets can be accommodated within a standard container, allowing for easy transport during transportation. The total mass of the integrated cabinet or cabinets is less than or equal to 36,000 kg, ensuring that the maximum total mass of the standard container is met.

[0037] In one possible design, the energy storage cabinet houses battery units and sampling units, the integrated cabinet houses a main control box, a low-voltage power distribution module, a battery management module, a water cooling unit and a fire control module, and energy storage converters and step-up transformers are installed outside the energy storage cabinet and the integrated cabinet.

[0038] In this configuration, the energy storage converter and the step-up transformer are both arranged outside the integrated cabinet, the space inside the integrated cabinet is relatively larger, and the weight of the integrated cabinet is relatively light.

[0039] In a possible design, the energy storage cabinet contains the battery unit and the sampling unit, and the integrated cabinet contains the master control box, the low-voltage power distribution module, the battery management module, the water cooling unit, the fire control module, and the energy storage converter. The energy storage cabinet and the integrated cabinet are externally provided with the step-up transformer.

[0040] In this arrangement, the step-up transformers are arranged outside the integrated cabinet, the space in the integrated cabinet is relatively larger, and the weight of the integrated cabinet is relatively lighter.

[0041] In a possible design, the energy storage cabinet contains the battery unit and the sampling unit, and the integrated cabinet contains the master control box, the low-voltage power distribution module, the battery management module, the water cooling unit, the fire control module, the energy storage converter, and the step-up transformer.

[0042] In this arrangement, the energy storage converter and the step-up transformer are integrated in the integrated cabinet, the integration degree of the integrated cabinet is improved, and the transportation of the energy storage system is facilitated.

[0043] In a possible design, the number of the energy storage cabinets is multiple, the multiple energy storage cabinets are arranged in an array and are spaced apart, and the integrated cabinet is provided with at least one energy storage cabinet on each of the opposite sides.

[0044] In this arrangement, the multiple energy storage cabinets are relatively closer to the integrated cabinet, which is beneficial to the connection between the energy storage cabinets and the integrated cabinet.

[0045] In a second aspect, an integrated cabinet is provided, which includes a high-voltage unit, a low-voltage unit, and a thermal management unit, and the high-voltage unit, the low-voltage unit, and the thermal management unit are arranged in the cabinet body of the integrated cabinet in a partitioned manner. The integrated cabinet further includes a second high-voltage interface, a second low-voltage interface, and a thermal management unit interface.

[0046] The integrated cabinet provided by the embodiments of the present application is applied to an energy storage system. Since the high-voltage unit, the low-voltage unit, and the thermal management unit are arranged in the integrated cabinet, the distance between the high-voltage unit, the low-voltage unit, and the thermal management unit and the battery unit is increased, and the high-voltage unit, the low-voltage unit, and the thermal management unit are less affected by the thermal interference in the use process of the battery unit, thereby improving the stability of the integrated cabinet and further improving the stability of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0048] FIG. 1 is a structural schematic diagram of an energy storage system provided by an embodiment of the present application;

[0049] Fig. 2 is a structural schematic diagram of an energy storage cabinet in an energy storage system according to an embodiment of the present application;

[0050] Fig. 3 is an exploded schematic diagram of an electric box in an energy storage cabinet in an energy storage system according to an embodiment of the present application;

[0051] Fig. 4 is an exploded schematic diagram of a battery cell in an energy storage cabinet in an energy storage system according to an embodiment of the present application;

[0052] Fig. 5 is a structural schematic diagram of an energy storage cabinet according to a first embodiment of the present application;

[0053] Fig. 6 is a structural schematic diagram of an energy storage system according to a second embodiment of the present application;

[0054] Fig. 7 is a structural schematic diagram of an integrated cabinet according to a second embodiment of the present application;

[0055] Fig. 8 is a schematic diagram of the relative position relationship between an integrated cabinet and a step-up transformer according to a third embodiment of the present application;

[0056] Fig. 9 is a schematic diagram of the relative position relationship between an integrated cabinet and an energy storage converter according to a fourth embodiment of the present application;

[0057] Fig. 10 is a structural schematic diagram of an integrated cabinet according to a fifth embodiment of the present application;

[0058] Fig. 11 is a schematic diagram of the relative position relationship between an integrated cabinet, a step-up transformer and an energy storage converter according to a sixth embodiment of the present application;

[0059] Fig. 12 is a structural schematic diagram of an integrated cabinet in an energy storage system according to a seventh embodiment of the present application;

[0060] Fig. 13 is a schematic diagram of the relative position relationship between an integrated cabinet and an energy storage cabinet in an energy storage system according to an eighth embodiment of the present application;

[0061] Fig. 14 is a schematic diagram of the relative position relationship between an integrated cabinet and an energy storage cabinet in an energy storage system according to a ninth embodiment of the present application;

[0062] Fig. 15 is a schematic diagram of the arrangement of multiple energy storage systems according to an embodiment of the present application.

[0063] The reference numerals involved in the above drawings are as follows: 1-energy storage system; 10-energy storage cabinet; 11-first cabinet body; 111-first high-voltage interface; 112-first low-voltage interface; 113-fluid pipeline interface; 12-battery unit; 120-battery monomer; 121-outer shell; 121a-casing; 121b-end cover; 122-electrode terminal; 123-electrode assembly; 13-DC / DC converter; 14-electric box; 14a-upper box body; 14b-lower box body; 15-battery cluster; 20-integrated cabinet; 21-second cabinet body; 211-second high-voltage interface; 212-second low-voltage interface; 213-thermal management unit interface; 22-high-voltage unit; 220-master control box; 23-low-voltage unit; 24-thermal management unit; 25-energy storage converter; 26-voltage-boosting transformer; 27-first isolation structure; 28-second isolation structure. DETAILED DESCRIPTION

[0064] In order to make the technical problems to be solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0065] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two).

[0066] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0067] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated structure or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0068] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0069] The energy storage system is used for storing electric energy. In the related art, a container type energy storage system includes a container, a battery and a functional module matched with the battery are installed in the container. The functional module is, for example, a master control box, a power distribution cabinet, a water cooling unit, etc. During the working process of the energy storage system, the battery emits relatively large heat, which will be transferred to the functional module, so that the temperature of the functional module rises, affecting the running stability of the functional module. Since the battery is the core structure of the energy storage device, the space for installing the battery needs to be reserved in the container first, and then the functional module is installed in the remaining space, which makes the installation position of each device in the functional module be relatively limited, and the functional module is relatively greatly affected by the heat of the battery. In addition, since the service life of the battery is usually relatively long, the service life of the functional module is shorter than that of the battery, so the functional module needs to be maintained and replaced more frequently than the battery. Since the installation position of the functional module is relatively limited, the difficulty of replacement and maintenance is relatively high, so the maintenance cost of the energy storage system is relatively high.

[0070] Based on the above considerations, in order to solve the above problems, the embodiments of the present application provide an energy storage system, which includes an energy storage cabinet and an integrated cabinet. The battery unit is installed in the energy storage cabinet, and the functional module matched with the battery unit is installed in the integrated cabinet. In this way, on the one hand, the distance between the functional module and the battery unit is relatively large, reducing the thermal interference between the functional module and the battery unit, improving the use stability of the functional module, on the other hand, the functional module is separately installed in the integrated cabinet, and the installation position is not limited by the battery unit, which is convenient for the layout design of the functional module, and is conducive to the replacement and maintenance of the functional module.

[0071] The battery box provided by the embodiments of the present application is explained and described in detail below.

[0072] As shown in FIG. 1, the application provides an energy storage system 1, which comprises an integrated cabinet 20 and at least one energy storage cabinet 10. The energy storage cabinet 10 is provided with a battery unit 12. The energy storage cabinet 10 comprises a first high-voltage interface 111, a first low-voltage interface 112, and a fluid pipeline interface 113. The integrated cabinet 20 is provided with a high-voltage unit 22, a low-voltage unit 23, and a thermal management unit 24. The integrated cabinet 20 comprises a second high-voltage interface 211, a second low-voltage interface 212, and a thermal management unit interface 213. One integrated cabinet 20 is provided corresponding to at least one energy storage cabinet 10. The second high-voltage interface 211 of the integrated cabinet 20 is connected to the first high-voltage interface 111 of the at least one energy storage cabinet 10. The second low-voltage interface 212 of the integrated cabinet 20 is connected to the first low-voltage interface 112 of the at least one energy storage cabinet 10. The thermal management unit interface 213 of the integrated cabinet 20 is connected to the fluid pipeline interface 113 of the at least one energy storage cabinet 10.

[0073] The energy storage cabinet 10 and the integrated cabinet 20 are independent structures. For the sake of distinction, the cabinet body of the energy storage cabinet 10 is referred to as a first cabinet body 11. The first cabinet body 11 is used to provide a containing space for the battery unit 12. The first cabinet body 11 has a first inner cavity, and the battery unit 12 is installed in the first inner cavity. The first cabinet body 11 of the energy storage cabinet 10 can be a standard part meeting the international standards or related Chinese national standards formulated by the International Organization ISO, or a non-standard part. The first cabinet body 11 of the energy storage cabinet 10 can be referred to as a container. The first cabinet body 11 of the energy storage cabinet 10 can have various shapes, such as a prism shape, a cylindrical shape, etc. The prism can be a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc. As an example, the first cabinet body 11 of the energy storage cabinet 10 is a quadrangular prism, specifically, a cuboid. The first cabinet body 11 of the energy storage cabinet 10 has a top plate, a bottom plate, and a plurality of side plates connected between the top plate and the bottom plate. In a specific example, the first cabinet body 11 of the energy storage cabinet 10 can have a cuboid structure. The first cabinet body 11 comprises a rectangular top plate and a bottom plate, and four side plates are arranged between the top plate and the bottom plate. The four side plates are sequentially connected to form a rectangular ring structure, and the top of the side plate is connected to the top plate, and the bottom of the side plate is connected to the bottom plate. At least one side plate is provided with a first opening for the battery unit 12 and the water cooling structure to be installed into the first inner cavity. The first opening can be provided with a first cabinet door, and the first cabinet door and the side plate can be connected by sliding or hinged, etc.

[0074] The number of battery units 12 in a single energy storage cabinet 10 can be one or more, as shown in FIG. 2, a plurality of battery units 12 are arranged in a single energy storage cabinet 10. As shown in FIG. 3, a single battery unit 12 includes one or more battery monomers 120 (a plurality of battery monomers 120 are arranged in a single battery unit 12 shown in FIG. 3), and the plurality of battery monomers 120 are connected in series, in parallel or in hybrid connection. The battery monomer 120 can be a secondary battery, which refers to a battery monomer 120 that can be activated by charging after the battery monomer 120 is discharged. The battery monomer 120 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited by the embodiments of the present application.

[0075] The battery monomer 120 can be a cylindrical battery monomer, a prismatic battery monomer, a soft package battery monomer or other shaped battery monomers, and the prismatic battery monomer includes a square can battery monomer, a blade-shaped battery monomer 120, a multi-prismatic battery, such as a hexagonal prism battery, etc.

[0076] As shown in FIG. 4, the battery monomer 120 includes an outer shell 121, an electrode terminal 122 and an electrode assembly 123, the outer shell 121 includes a shell 121a and an end cover 121b, the shell 121a has an opening, and the end cover 121b is covered at the opening of the shell 121a to form an inner cavity with the shell 121a, and the outer shell 121 can be a steel shell, an aluminum shell, a plastic shell, a composite metal shell or an aluminum-plastic film, etc. The electrode assembly 123 can be a winding type structure or a laminated type structure. The electrode assembly 123 is installed in the inner cavity, and the electrode assembly 123 includes an electrode core body, and the electrode core body is provided with tabs including positive and negative tabs. The end cover 121b includes a top cover and a top cover patch, and the top cover patch is arranged on the side of the top cover away from the shell 121a. The electrode terminal 122 is installed on the top cover, and the electrode terminal 122 includes a positive electrode terminal and a negative electrode terminal, the positive tab is connected with the positive electrode terminal, and the negative tab is connected with the negative electrode terminal. The tabs and the electrode terminal 122 are connected through an adapter plate. The adapter plate is used to prevent damage to the battery or burning of other components when the electrode assembly 123 is short-circuited or overcharged or over-discharged, so as to ensure the safety of the battery in use.

[0077] The plurality of battery cells 120 can be directly installed in the first cabinet body 11, or, as shown in FIG. 3, the energy storage cabinet 10 further comprises an electric box 14, the plurality of battery cells 120 in the battery unit 12 are installed in the electric box 14, and the electric box 14 is installed in the first cabinet body 11. The electric box 14 plays a protective role for the battery unit 12, and the electric box 14 plays an integrated role for the plurality of battery cells 120 in the battery unit 12. By installing the electric box 14 in the first cabinet body 11, the plurality of battery cells 120 can be installed in the first cabinet body 11, reducing the difficulty of connection operation and improving the assembly efficiency of the energy storage cabinet 10. The electric box 14 can include an upper box body 14a and a lower box body 14b, the upper box body 14a is connected with the lower box body 14b, and the upper box body 14a and the lower box body 14b surround to form an internal space of the electric box 14 for installing the battery cells 120.

[0078] The integrated cabinet 20 is provided with a high-voltage unit 22, a low-voltage unit 23 and a thermal management unit 24, that is, the integrated cabinet 20 at least integrates the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 into one, and the integrated cabinet 20 has a cabinet body, which is referred to as a second cabinet body 21 for the sake of distinction, and the second cabinet body 21 is used to provide accommodation space for the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24. The second cabinet body 21 has a second inner cavity, and the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 are installed in the second inner cavity. The second cabinet body 21 of the integrated cabinet 20 can be a standard part meeting the international standard established by the international organization ISO, or a non-standard part. The second cabinet body 21 of the integrated cabinet 20 can be referred to as a container. The second cabinet body 21 can have various shapes, such as a prism shape or a cylindrical shape. The prism can be a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc. As an example, the second cabinet body 21 of the integrated cabinet 20 has a quadrangular prism shape, specifically, a cuboid shape. The second cabinet body 21 of the integrated cabinet 20 has a top plate, a bottom plate, and a plurality of side plates connected between the top plate and the bottom plate. In a specific example, the second cabinet body 21 of the integrated cabinet 20 can have a cuboid structure, and the second cabinet body 21 of the integrated cabinet 20 includes a rectangular top plate and a rectangular bottom plate, and four side plates are arranged between the top plate and the bottom plate, and the four side plates are sequentially connected to form a rectangular ring-shaped structure, and the top of the side plate is connected with the top plate, and the bottom of the side plate is connected with the bottom plate. At least one side plate is provided with a second opening, and the second opening is used for installing the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 into the second inner cavity. A second cabinet door can be installed at the second opening, and the second cabinet door and the side plate can be in sliding connection or hinged connection, etc.

[0079] The high-voltage unit 22 includes one or more high-voltage devices, and each high-voltage device in the high-voltage unit 22 is connected to the second high-voltage interface 211 through a high-voltage line.

[0080] The low-voltage unit 23 includes one or more low-voltage devices, and the low-voltage unit 23 can include low-voltage auxiliary devices and / or control devices. Each low-voltage device in the low-voltage unit 23 is connected to the second low-voltage interface 212 through a low-voltage line.

[0081] The thermal management unit 24 is used to deliver a fluid medium to the energy storage cabinet 10. The fluid medium can be used to control the temperature of the energy storage cabinet 10.

[0082] The energy storage cabinet 10 includes a first high-voltage interface 111, and the integrated cabinet 20 includes a second high-voltage interface 211. The first high-voltage interface 111 is connected to high-voltage lines in the energy storage cabinet 10, and the battery units 12 are connected to the high-voltage lines in the energy storage cabinet 10. The second high-voltage interface 211 is electrically connected to each high-voltage device in the high-voltage unit 22 in the integrated cabinet 20. The first high-voltage interface 111 is connected to the second high-voltage interface 211, so that the battery units 12 are connected to the high-voltage unit 22 in the integrated cabinet 20, and the battery units 12 are controlled by the high-voltage unit 22 in the integrated cabinet 20. The first high-voltage interface 111 and the second high-voltage interface 211 can include plug-in connectors. The first high-voltage interface 111 and the second high-voltage interface 211 can be connected by plug-in. In some examples, the first high-voltage interface 111 and the second high-voltage interface 211 can be connected by a high-voltage adapter, and the high-voltage adapter has two connection terminals, one of which is connected to the first high-voltage interface 111, and the other of which is connected to the second high-voltage interface 211, so that the first high-voltage interface 111 and the second high-voltage interface 211 are connected by the high-voltage adapter. The second high-voltage interface 211 and each high-voltage device can be connected by plug-in, and the connection terminals of each high-voltage device are connected to the second high-voltage interface 211, which is convenient and improves the assembly efficiency of the integrated cabinet 20. Since each high-voltage device in the high-voltage unit 22 installed in the integrated cabinet 20 is connected to the second high-voltage interface 211, connecting the second high-voltage interface 211 to the first high-voltage interface 111 can connect the battery units 12 in the energy storage cabinet 10 to each high-voltage device in the integrated cabinet 20, which improves the assembly efficiency. Since the second high-voltage interface 211 of one integrated cabinet 20 can be electrically connected to the first high-voltage interface 111 of multiple energy storage cabinets 10, the high-voltage unit 22 in the integrated cabinet 20 can control the battery units 12 in the multiple energy storage cabinets 10, which is equivalent to integrating the high-voltage devices for controlling the battery units 12 in the multiple energy storage cabinets 10 in the high-voltage unit 22 of the integrated cabinet 20, which improves the integration of the integrated cabinet 20. The connection between the first high-voltage interface 111 and the second high-voltage interface 211 can be plug-in, which improves the assembly efficiency.

[0083] The energy storage cabinet 10 comprises a first low-voltage interface 112, and the integrated cabinet 20 comprises a second low-voltage interface 212. The first low-voltage interface 112 is connected with low-voltage lines in the energy storage cabinet 10. For example, the battery unit 12 is connected with low-voltage lines, and the low-voltage lines connected with the battery unit 12 in the energy storage cabinet 10 are connected with the first low-voltage interface 112. The second low-voltage interface 212 is connected with each low-voltage device in the low-voltage unit 23 in the integrated cabinet 20. The first low-voltage interface 112 is connected with the second low-voltage interface 212, so that the battery unit 12 is connected with the low-voltage unit 23 in the integrated cabinet 20, and the battery unit 12 is controlled by the low-voltage unit 23 in the integrated cabinet 20. The first low-voltage interface 112 and the second low-voltage interface 212 can comprise plug-in connectors. The first low-voltage interface 112 and the second low-voltage interface 212 can be connected by plug-in. In some examples, the first low-voltage interface 112 and the second low-voltage interface 212 can be connected by a low-voltage adapter, and the low-voltage adapter comprises two connection terminals, one of which is connected with the first low-voltage interface 112, and the other is connected with the second low-voltage interface 212, so that the first low-voltage interface 112 and the second low-voltage interface 212 are connected by the low-voltage adapter. The second low-voltage interface 212 and each low-voltage device can be connected by plug-in, and the connection terminals of each low-voltage device are connected with the second low-voltage interface 212 by plug-in. This connection method is convenient and can improve the assembly efficiency of the integrated cabinet 20. Since each low-voltage device in the low-voltage unit 23 in the integrated cabinet 20 is connected with the second low-voltage interface 212, connecting the second low-voltage interface 212 with the first low-voltage interface 112 can connect the battery unit 12 in the energy storage cabinet 10 with each low-voltage device in the integrated cabinet 20, thereby improving the assembly efficiency. Since the second low-voltage interface 212 of one integrated cabinet 20 can be connected with the first low-voltage interface 112 of multiple energy storage cabinets 10, the low-voltage unit 23 in the integrated cabinet 20 can control the battery unit 12 in the multiple energy storage cabinets 10, which is equivalent to integrating the low-voltage devices for controlling the battery unit 12 in the multiple energy storage cabinets 10 in the low-voltage unit 23 in the integrated cabinet 20, thereby improving the integration of the integrated cabinet 20. The connection between the first low-voltage interface 112 and the second low-voltage interface 212 can be plug-in, thereby improving the assembly efficiency.

[0084] The energy storage cabinet 10 comprises a fluid pipeline interface 113, the energy storage cabinet 10 is filled with a fluid medium, the fluid pipeline interface 113 is used for the fluid medium in the energy storage cabinet 10 to flow in or out, and the fluid medium can be used for heat exchange with the battery cell 12 to control the temperature of the battery cell 12. For example, the fluid medium can comprise cooling liquid used for heat dissipation of the battery cell 12. The energy storage cabinet 10 can adopt immersion cooling or structural cooling. The immersion cooling means that the first inner cavity of the entire energy storage cabinet 10 is filled with cooling liquid, and the battery cell 12 is immersed in the cooling liquid. The fluid pipeline interface 113 of the energy storage cabinet 10 is in communication with the first inner cavity of the energy storage cabinet 10, and the cooling liquid can be introduced into the first inner cavity of the energy storage cabinet 10 through the fluid pipeline interface 113. The structural cooling means that a water cooling structure is arranged in the energy storage cabinet 10, and the water cooling structure can comprise one or more water cooling structures such as a water cooling pipe and a water cooling plate. The water cooling structure has a flow channel filled with cooling liquid. The water cooling structure is in contact with the battery cell 12, thereby dissipating heat for the battery cell 12. The water cooling structure is connected with the fluid pipeline interface 113 of the energy storage cabinet, so that the flow channel of the water cooling structure is in communication with the fluid pipeline interface 113, and the flow channel of the water cooling structure can be controlled to introduce or discharge the cooling liquid through the fluid pipeline interface 113.

[0085] In the energy storage system 1 provided in the embodiments of the present application, the battery cell 12 is arranged in the energy storage cabinet 10, and the high-voltage unit 22 for high-voltage electrical control of the battery cell 12, the low-voltage unit 23 for low-voltage electrical control of the battery cell 12, and the thermal management unit 24 for thermal management of the battery cell 12 are arranged in the integrated cabinet 20. On the one hand, since each high-voltage device in the high-voltage unit 22 is connected with the second high-voltage interface 211, the connection between the high-voltage unit 22 and the battery cell 12 can be realized by connecting the second high-voltage interface 211 with the first high-voltage interface 111. In this way, the distance between the high-voltage unit 22 and the battery cell 12 is increased, the distance between the low-voltage unit 23 and the battery cell 12 is increased, and the distance between the thermal management unit 24 and the battery cell 12 is increased, thereby reducing the thermal interference of the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 in the use process of the battery cell 12, improving the stability of the integrated cabinet 20, and further improving the stability of the energy storage system 1. Since the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 are installed in the integrated cabinet 20, and the battery cell 12 is not installed in the integrated cabinet 20, the installation positions of the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 are not limited by the installation position of the battery cell 12. Therefore, it is convenient to more reasonably arrange the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 in the integrated cabinet 20, which can improve the space utilization rate of the integrated cabinet 20 and facilitate the maintenance and management of the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24.

[0086] During the transportation of the energy storage system 1, the integrated cabinet 20 can be transported as a whole, or can be transported by being split into multiple modules, for example, the high-voltage unit 22 is transported as an independent module, the low-voltage unit 23 is transported as an independent module, the thermal management unit 24 is transported as an independent module, and the cabinet body of the integrated cabinet 20 is transported as an independent module, so as to reduce the weight of the independent module. During the transportation of the energy storage system 1, the energy storage cabinet 10 can be transported as a whole, or can be transported by being split into multiple modules, for example, the cabinet body of the energy storage cabinet 10 is transported as an independent module, and a plurality of battery units 12 in the energy storage cabinet 10 are divided into multiple groups, each group including a plurality of battery units 12, and each group of battery units 12 is transported as an independent module. The above-mentioned arrangement of splitting the integrated cabinet 20 and the energy storage cabinet 10 into multiple independent modules for transportation makes the energy storage system 1 modularized, which is convenient for transportation.

[0087] In a possible design, as shown in FIG. 5, a single energy storage cabinet 10 includes at least 2 battery clusters 15, two or more energy storage cabinets can be accommodated in a standard container, and / or the total mass of two or more energy storage cabinets is less than or equal to 36000 kg.

[0088] A battery cluster 15 includes at least one battery unit 12, and each battery unit 12 can include a battery monomer or an electric box in which a plurality of battery monomers are installed and connected in series, parallel or hybrid connection. Exemplarily, a battery cluster 15 can be composed of a plurality of battery units 12 connected in series.

[0089] The at least 2 battery clusters 15 in a single energy storage cabinet 10 can be connected in series, parallel or hybrid. Exemplarily, an energy storage cabinet 10 is provided with 2 battery clusters 15, and the 2 battery clusters 15 are connected in series. The series connection between the 2 battery clusters 15 can increase the voltage of the energy storage cabinet 10, so as to be more suitable for application scenarios requiring high voltage. The parallel connection between the 2 battery clusters 15 can increase the battery capacity of the energy storage cabinet 10, which makes the energy storage cabinet 10 store more energy, so as to be more suitable for application scenarios requiring long-time power supply.

[0090] The at least 2 battery clusters 15 in a single energy storage cabinet 10 can be adjusted according to the application scenario requirements of the energy storage cabinet 10, so as to make the energy storage cabinet 10 adapt to application scenarios with different use requirements.

[0091] In some examples, the size of the standard container can be 10 feet, 20 feet, 30 feet, 40 feet, or 45 feet, etc. The above-mentioned sizes can be defined according to the field standard requirements, for example, the standard container size can be the standard requirement defined by the laws and regulations, departmental rules, etc. related to land transportation and / or sea transportation in various countries, for example, the container-type energy storage cabinet 101 can adopt a container that meets the requirements of the People's Republic of China National Standard “GBT1413-2023 Series 1 Containers Classification, Dimensions and Rated Mass”. The size of the standard container includes length, width and height, and the size of each standard container is described as follows:

[0092] 10 feet includes: the length is 2991mm, the tolerance is 0-5mm; the width is 2438mm, the tolerance is 0-5mm; the height is not more than 2438mm, the tolerance is 0-5mm.

[0093] 20 feet includes: the length is 6058mm, the tolerance is 0-6mm; the width is 2438mm, the tolerance is 0-5mm; the height can be 2896mm, 2591mm or not more than 2438mm, the tolerance is 0-5mm.

[0094] 30 feet includes: the length is 9125mm, the tolerance is 0-10mm; the width is 2438mm, the tolerance is 0-5mm; the height is not more than 2438mm, the tolerance is 0-5mm.

[0095] 40 feet includes: the length is 12192mm, the tolerance is 0-10mm; the width is 2438mm, the tolerance is 0-5mm; the height is 2896mm, 2591mm or not more than 2438mm, the tolerance is 0-5mm.

[0096] 45 feet includes: the length is 13716mm, the tolerance is 0-10mm; the width is 2438mm, the tolerance is 0-5mm; the height is 2591mm or 2896mm, the tolerance is 0-5mm.

[0097] Two or more energy storage cabinets 10 can be accommodated in one standard container, that is, in one embodiment, the size of two or more energy storage cabinets 10 is equal to the size of one standard container, and the two or more energy storage cabinets 10 can be transported as one standard container. In another embodiment, the total size of the two or more energy storage cabinets 10 is slightly smaller than the size of one standard container, so that the two or more energy storage cabinets 10 can be accommodated in one standard container. During transportation, the two or more energy storage cabinets 10 can be placed in one standard container for transportation.

[0098] Two or more energy storage cabinets 10 can be accommodated in a standard container. For example, two energy storage cabinets 10, three energy storage cabinets 10, four energy storage cabinets 10 or more energy storage cabinets 10 can be accommodated in a standard container. That is, two energy storage cabinets 10, three energy storage cabinets 10, four energy storage cabinets 10 or more energy storage cabinets 10 can be accommodated in a standard container, or the total size of two energy storage cabinets 10, three energy storage cabinets 10, four energy storage cabinets 10 or more energy storage cabinets 10 can be equal to the total size of a standard container.

[0099] Two or more energy storage cabinets 10 can be accommodated in a standard container. In this arrangement, on the one hand, two or more energy storage cabinets 10 can be transported in a standard container during transportation, facilitating the movement during transportation. On the other hand, the size of a single energy storage cabinet 10 is smaller than the size of a standard container, so that the weight of a single energy storage cabinet 10 is relatively smaller, facilitating the handling.

[0100] The total mass of two or more energy storage cabinets 10 is less than or equal to 36000kg. For example, the total mass of two energy storage cabinets 10 is less than or equal to 36000kg, the total mass of three energy storage cabinets 10 is less than or equal to 36000kg, the total mass of four energy storage cabinets 10 or more energy storage cabinets 10 is less than or equal to 36000kg.

[0101] The total mass of two or more energy storage cabinets 10 is less than or equal to 36000kg. In the case where the size of two or more energy storage cabinets 10 is equal to the size of a standard container, the total mass of two or more energy storage cabinets 10 is less than or equal to 36000kg. In the case where the total size of two or more energy storage cabinets 10 is slightly smaller than the size of a standard container, the total mass of two or more energy storage cabinets 10 is less than 36000kg, so that when two or more energy storage cabinets 10 are accommodated in a standard container, the total mass of the standard container and the two or more energy storage cabinets 10 accommodated therein is less than or equal to 36000kg.

[0102] The total mass of two or more energy storage cabinets 10 is less than or equal to 36000kg, so that when two or more energy storage cabinets 10 are accommodated in a standard container, the maximum total mass of the standard container is satisfied, facilitating transportation.

[0103] In the process of land transportation, the size of the transportation device (such as a vehicle) for transportation is usually adapted to the transportation of a standard container. For example, when the transportation device is adapted to transport a standard container, since two or more energy storage cabinets 10 can be accommodated in a standard container, the transportation device is adapted to transport two or more energy storage cabinets 10, that is, the size of the energy storage cabinet 10 is more suitable for the transportation device, the space utilization of the transportation device is relatively larger, the transportation is facilitated, and the transportation cost is relatively low. In the process of sea transportation, sea transportation usually charges a standard container for space. If a non-standard container is used, the space occupied by the non-standard container is charged according to the size of the standard container adjacent to the space occupied by the non-standard container. That is, even if the size of the transported object is close to but less than the size of a 20-foot container, the space is charged according to the size of a 20-foot container. In the embodiment, for example, if two energy storage cabinets 10 can be accommodated in a 20-foot container, in the process of sea transportation, two energy storage cabinets 10 occupy the same space as a 20-foot container, or two energy storage cabinets 10 are placed in a 20-foot container for transportation, and the space is charged according to a 20-foot container. The transportation cost is relatively low.

[0104] In a possible design, as shown in FIGS. 5 and 6, the energy storage cabinet 10 further comprises a DC / DC converter 13 connected to the battery unit 12 and the high-voltage unit 22, respectively.

[0105] The DC / DC converter 13 is installed in the energy storage cabinet 10. The DC / DC converter 13 is connected to the first high-voltage interface 111, so as to be connected to the high-voltage unit 22 through the connection of the first high-voltage interface 111 and the second high-voltage interface 211. The DC / DC converter 13 is used to adjust the output voltage of the battery unit 12, improve the voltage stability, improve the efficiency and safety of the battery monomer 120 in the battery unit 12 in the process of charging and discharging, and can utilize the capacity of the battery monomer 120 to the greatest extent through relatively accurate control, thereby prolonging the service life of the battery monomer 120.

[0106] For example, a plurality of battery units 12 are installed in the first cabinet 11, and the plurality of battery units 12 are connected in series to form a battery cluster 15. One or more battery clusters 15 can be arranged in the first cabinet 11, and one DC / DC converter 13 is connected to each battery cluster 15. In FIG. 5, the first cabinet 11 is provided with two battery clusters 15, and the first cabinet 11 is provided with two DC / DC converters 13. The two battery clusters 15 are connected to the two DC / DC converters 13 one by one.

[0107] In a possible design, one integrated cabinet 20 is provided corresponding to N energy storage cabinets 10, 2≤N≤8. For example, one integrated cabinet 20 can be provided corresponding to 2, 3, 4, 5, 6, 7, or 8 energy storage cabinets 10. When one integrated cabinet 20 is provided corresponding to N energy storage cabinets 10, the first high-voltage interfaces 111 of the N energy storage cabinets 10 are all connected to the second high-voltage interface 211 of the integrated cabinet 20, and the high-voltage electrical control of the plurality of energy storage cabinets 10 is performed through one integrated cabinet 20, thereby improving the utilization rate of the high-voltage unit 22 in the integrated cabinet 20. The first low-voltage interfaces 112 of the N energy storage cabinets 10 are all connected to the second low-voltage interface 212 of the integrated cabinet 20, and the low-voltage electrical control of the plurality of energy storage cabinets 10 is performed through one integrated cabinet 20, thereby improving the utilization rate of the low-voltage unit 23 in the integrated cabinet 20. The fluid pipeline interfaces 113 of the N energy storage cabinets 10 are all connected to the thermal management unit interface 213 of the integrated cabinet 20, and the thermal management control of the N energy storage cabinets 10 is performed through one integrated cabinet 20, thereby improving the utilization rate of the thermal management unit 24 in the integrated cabinet 20.

[0108] In a possible design, the thermal management unit 24 includes a water cooling unit, and the fluid pipeline interface 113 of the energy storage cabinet 10 is configured to be connected to the thermal management unit interface 213, so that the thermal management unit 24 performs thermal management on the battery unit 12.

[0109] The water cooling unit is connected to the fluid pipeline interface 113 of the energy storage cabinet 10, and the water cooling unit is configured to deliver a fluid medium to the energy storage cabinet 10 through the fluid pipeline interface 113.

[0110] For example, the water cooling unit includes a pumping device connected to the fluid pipeline interface 113, and the pumping device is configured to deliver the fluid medium to the energy storage cabinet 10 through the fluid pipeline interface 113.

[0111] Since the water cooling unit is arranged in the integrated cabinet 20 and the battery unit 12 is arranged in the energy storage cabinet 10, at least the following effects are achieved:

[0112] The distance between the water cooling unit and the battery unit 12 is relatively far, and the heat transfer between the water cooling unit and the battery unit 12 can be relatively effectively isolated. For example, the heat generated by the battery unit 12 during operation has a reduced effect on the water cooling unit, thereby facilitating the heat dissipation efficiency of the water cooling unit; the heat transfer from the water cooling unit to the battery unit 12 during operation is reduced, thereby improving the operation stability of the battery unit 12 and reducing potential safety hazards.

[0113] The water-cooled unit is separately arranged from the battery unit 12, which is beneficial to the maintenance and repair of the water-cooled unit and the battery unit 12. For example, the water-cooled unit can be repaired without disturbing the battery unit 12, that is, the battery unit 12 can remain in the working state during the repair of the water-cooled unit.

[0114] The energy storage system 1 includes a master control box 220, which can be arranged in the energy storage cabinet 10, the integrated cabinet 20, or outside the energy storage cabinet 10 and the integrated cabinet 20. In the case where the master control box 220 is arranged in the integrated cabinet 20, the master control box 220 can be attributed to the high-voltage unit 22.

[0115] As shown in FIGS. 6 and 7, in a possible design, the high-voltage unit 22 includes the master control box 220, and the first high-voltage interface 111 of the energy storage cabinet 10 is arranged to be connected to the second high-voltage interface 211, so that the high-voltage unit controls the battery unit in a high-voltage electrical manner.

[0116] The master control box 220 is connected to the second high-voltage interface 211 of the integrated cabinet 20, and the master control box 220 is electrically connected to the battery unit 12 through the connection between the first high-voltage interface 111 and the second high-voltage interface 211. The master control box 220 is used for monitoring, controlling, and managing the energy transmission of the battery unit 12, so as to ensure the safe, efficient, and reliable operation of the energy storage system 1. One end of the master control box 220 can be connected to a bus, and the bus can be connected to a power grid. The other end of the master control box 220 is connected to the battery unit 12, so as to connect the battery unit 12 to the bus, thereby realizing the energy transmission between the battery unit 12 and the power grid.

[0117] In the case where the high-voltage unit 22 includes the master control box 220 and the energy storage cabinet 10 is provided with the DC / DC converter 13, the DC / DC converter 13 is connected to the master control box 220.

[0118] In this arrangement, the master control box 220 is arranged in the integrated cabinet 20, so that the space of the energy storage cabinet 10 is not occupied, the space utilization of the energy storage cabinet 10 is improved, and the volumetric energy density of the energy storage cabinet 10 is improved. The master control box 220 and other high-voltage electrical components are collectively attributed to the high-voltage unit 22, and are all arranged in the integrated cabinet 20, which is beneficial to the centralized management and control of the high-voltage structure including the master control box 220 in the high-voltage unit 22.

[0119] In a possible design, the master control box 220 includes at least one component or multiple components of a direct-current bus, a direct-current disconnector, a high-voltage relay, a protection fuse (FUSE), and a current sensor.

[0120] The direct-current bus is used to connect the battery unit 12 to the main circuit of the energy storage system 1, and can effectively collect and distribute current, thereby improving the power processing capability of the energy storage system 1.

[0121] DC disconnectors are used to connect the battery units 12, which can be disconnected from other structures in the energy storage system 1 when needed, to facilitate the maintenance, repair of the energy storage system 1, or to protect the energy storage system 1 in an emergency. The arrangement of the DC disconnectors can improve the safety of the energy storage system 1.

[0122] High-voltage relays are used to control the high-voltage circuit in the energy storage system 1, which can automatically disconnect the circuit when detecting voltage, current or frequency exceeding the preset value, to prevent the energy storage system 1 from being overloaded or damaged.

[0123] Protective fuses are used to disconnect the circuit when the current of the energy storage system 1 is too large, to improve the safety of the energy storage system 1.

[0124] Current sensors are used to monitor the current state of the energy storage system 1 in real time, which is conducive to more accurate charging and discharging control of the energy storage system 1, and is conducive to optimization of charging and discharging strategies, thereby prolonging the service life of the battery units 12.

[0125] The multiple components in the main control box 220 work cooperatively, which can improve the stability and reliability of the energy storage system 1, and reduce the risk of failure. Integrating multiple components in the main control box 220 facilitates centralized management and monitoring of the components arranged in the main control box 220, reduces wiring complexity, and reduces installation and maintenance costs.

[0126] The main control box 220 can further include a box body, and the one or more components described above are arranged in the box body. By arranging the main control box 220, multiple components can be integrated in the box body, which facilitates maintenance and management of the components.

[0127] As shown in FIGS. 8 and 9, in one possible design, the high-voltage unit 22 further includes at least a power conversion system (PCS) 25 or a step-up transformer 26.

[0128] The power conversion system (PCS) 25 is used to control the input and output of energy of the energy storage system 1. External devices (such as a power grid) can convert alternating current into direct current through the power conversion system 25 to store energy in the battery units 12 of the energy storage system 1, to realize charging of the battery units 12. The energy storage system 1 can also convert direct current into alternating current through the power conversion system 25 to supply power to external devices, to realize discharging of the battery units 12.

[0129] When the high-voltage unit 22 includes the energy storage converter 25, the energy storage converter 25 can connect the energy storage system 1 to the power grid in parallel, realizing bidirectional power exchange between the energy storage system 1 and the power grid. Integrating the energy storage converter 25 in the high-voltage unit 22 increases the integration level of the integrated cabinet 20. The energy storage converter 25 is connected to the second high-voltage interface 211, reducing the wiring difficulty of the energy storage system 1.

[0130] The step-up transformer 26 is used to raise the output voltage of the energy storage system 1 to a voltage level matching the power grid, so that the energy storage system 1 can be safely and effectively connected to the power grid to realize bidirectional flow of electric energy. When the high-voltage unit 22 includes the step-up transformer 26, the step-up transformer 26 can adjust the output voltage according to different load requirements, providing flexible power supply to meet the needs of different application scenarios. Integrating the step-up transformer 26 in the high-voltage unit 22 increases the integration level of the integrated cabinet 20. The step-up transformer 26 is connected to the second high-voltage interface 211, reducing the wiring difficulty of the energy storage system 1.

[0131] In one possible design, the low-voltage unit 23 at least includes a low-voltage power distribution module and a control component part, and the first low-voltage interface 112 of the energy storage cabinet 10 is configured to be connected to the second low-voltage interface 212, so that the low-voltage power distribution module and the control component part control the battery unit 12 at low voltage.

[0132] The low-voltage power distribution module is connected to the second low-voltage interface 212, and the control component part is connected to the second low-voltage interface 212. Both the low-voltage power distribution module and the control component part are located in the integrated cabinet 20, increasing the integration level of the integrated cabinet. Connecting the second low-voltage interface 212 of the integrated cabinet 20 to the first low-voltage interface 112 of the energy storage cabinet 10 can realize the connection between the low-voltage unit 23 (at least including the low-voltage power distribution module and the control component part) of the integrated cabinet 20 and the battery unit 12 of the energy storage cabinet 10, so that the low-voltage power distribution module and the control component part do not need to be connected to the battery unit 12 respectively, thereby reducing the wiring difficulty in the energy storage system 1.

[0133] In one possible design, the low-voltage power distribution module at least includes one or more of a molded case circuit breaker, a miniature circuit breaker, a 24V power module, an uninterruptible power supply (UPS) backup power, and an emergency stop button component.

[0134] Both the molded case circuit breaker and the miniature circuit breaker are used to provide short circuit and overload protection. Compared with the molded case circuit breaker, the miniature circuit breaker is relatively smaller in size and can be used in branch circuits to protect individual electrical components from current overload and short circuit.

[0135] The 24V power module is a power supply device capable of providing a 24V voltage, which can be used to power sensors, controllers, relays, and other electrical components that require a 24V voltage.

[0136] The UPS backup power is used to provide backup power to ensure the continuous operation of the electrical equipment in the energy storage system 1, avoiding data loss or equipment damage due to power grid outage.

[0137] The emergency stop button is a safety device that stops all actions of the energy storage system 1 when the emergency stop button is pressed, preventing equipment damage or personal injury in emergency situations and improving the safety of the energy storage system 1.

[0138] In this arrangement, one or more components of the molded case circuit breaker, miniature circuit breaker, 24V power module, UPS backup power, and emergency stop button are integrated into the low-voltage distribution module of the low-voltage unit, which can simplify the wiring and installation of multiple components, reduce maintenance difficulty, and improve maintenance efficiency.

[0139] In one possible design, the control component part includes at least one or more components of the master battery management unit (MBMU), fire control module, Ethernet (ETH), optical fiber conversion module, energy storage converter controller, and energy management module.

[0140] The master battery management unit is responsible for monitoring and managing the state of the battery unit 12 in the energy storage cabinet 10, including voltage, temperature, charging and discharging state, etc., to ensure that the battery unit 12 operates within a safe range, prolongs the service life of the battery unit 12, and improves the performance of the battery unit 12.

[0141] When the control component includes a fire control module, a fire control structure is arranged in the energy storage cabinet 10, the fire control structure is connected with the first low-voltage interface 112, and the fire control module is connected with the second low-voltage interface 212, so as to realize the control of the fire control module on the fire control structure. The fire control structure can include a fire control pipeline, a spray head, a detection structure and the like. The spray head is communicated with the fire control pipeline, and the fire control pipeline is used for spraying liquid into the first cabinet body 11 through the spray head to achieve the effect of fire extinguishing. The detection structure can include a smoke sensor, a temperature sensor and the like, and is used for detecting whether the first cabinet body 11 is on fire. The detection structure and the fire control pipeline are respectively connected with the fire control module, and the fire control module is used for controlling the conduction state of the fire control pipeline according to the feedback of the detection structure. Exemplarily, an electromagnetic valve can be arranged on the fire control pipeline, the electromagnetic valve is connected with the first interface, and the opening and closing state of the electromagnetic valve is controlled through the fire control module, so as to control the conduction state of the fire control pipeline. In this arrangement mode, the arrangement of the fire control structure improves the safety of the energy storage cabinet 10, the fire control module is arranged in the integrated cabinet 20, so as to improve the space utilization rate of the energy storage cabinet 10, and the volume energy density of the energy storage cabinet 10 is improved.

[0142] The Ethernet unit is mainly used for connecting the components in the energy storage system 1 which need to transmit data, or connecting the components in the energy storage system 1 which need to transmit data with other devices or networks, so as to transmit and share data. For example, the controllers in the energy storage system 1 can share information in real time through the Ethernet unit and work cooperatively.

[0143] The optical fiber conversion module is used for converting the Ethernet signal from electricity to optical signal, and then converting the optical signal back to electrical signal. Thus, it is beneficial to reduce signal attenuation during long-distance transmission, improve the stability and reliability of data transmission, and is especially suitable for occasions with strong electromagnetic interference or high security requirements.

[0144] The energy storage converter controller is used for controlling the operation of the energy storage converter, realizing the conversion and adjustment of electric energy.

[0145] The energy management module (EMS) is mainly responsible for controlling the operation of the energy storage system 1. For example, the energy management module can formulate the operation strategy of the energy storage system 1 by analyzing the load condition and demand of the power grid.

[0146] In this arrangement mode, one component or multiple components among the main battery management unit, the fire control, the Ethernet unit, the optical fiber conversion module, the energy storage converter controller and the energy management module are integrated in the control component part of the low-voltage unit, which can simplify the wiring and installation of multiple components, reduce the maintenance difficulty and improve the maintenance efficiency.

[0147] In the integrated cabinet 20, the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 can respectively include a plurality of different structures, and the structures in the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 can be staggered and installed in the integrated cabinet 20. For example, the installation of the structures in the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 in the second cabinet body 21 is performed according to factors such as wiring difficulty, size matching degree, space utilization rate, whether there is electromagnetic interference between adjacent structures, whether there is thermal interference between adjacent structures, and the like.

[0148] In other embodiments, the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 are partitioned and arranged in the integrated cabinet 20. The second inner cavity of the integrated cabinet 20 is divided into three areas, namely a high-voltage area, a low-voltage area and a thermal management area. All structures in the high-voltage unit 22 are installed in the high-voltage area, all structures in the low-voltage unit 23 are installed in the low-voltage area, and all structures in the thermal management unit 24 are installed in the thermal management area. That is, the structures in the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 are respectively concentrated and installed, so as to facilitate maintenance and management during use of the energy storage system 1. The second inner cavity of the integrated cabinet 20 is divided into three areas, which can be distinguished only from the aspect of space use, without actual physical separation. That is, the area in the second inner cavity for concentrating and installing the structures in the high-voltage unit 22 is the high-voltage area, the area in the second inner cavity for concentrating and installing the structures in the low-voltage unit 23 is the low-voltage area, and the area in the second inner cavity for concentrating and installing the structures in the thermal management unit 24 is the thermal management area. In other embodiments, a partition plate or the like can be used to divide the second inner cavity into three areas, so as to facilitate the division of the areas and reduce interference between adjacent units.

[0149] As shown in FIG. 10, in a possible design, the thermal management unit 24 is arranged adjacent to a side wall of the second cabinet body 21. The thermal management unit 24 includes a water cooling unit, and the water cooling unit includes a pumping device. The pipeline of the pumping device needs to extend to the outside of the second cabinet body 21 to be connected to the water cooling structure in the first cabinet body 11. The thermal management unit 24 is arranged adjacent to the side wall of the second cabinet body 21, and an opening can be provided on the side wall to allow the pipeline of the pumping device to extend out of the second cabinet body 21 through the opening. At the same time, since the water cooling unit generates heat during operation, arranging the thermal management unit 24 adjacent to the side wall of the second cabinet body 21 is beneficial to improving the heat dissipation efficiency of the water cooling unit.

[0150] In a possible design, as shown in FIG. 10, the high-voltage unit 22 and the thermal management unit 24 are arranged on both sides of the high-voltage unit 23. The high-voltage unit 22, the low-voltage unit 23, and the thermal management unit 24 are sequentially arranged in a certain direction in the integrated cabinet 20. For example, the extending direction of the straight line can be the length direction, the width direction, or the height direction of the second cabinet body 21. In a specific example, the high-voltage unit 22, the low-voltage unit 23, and the thermal management unit 24 are sequentially arranged in the length direction of the second cabinet body 21 in the second cabinet body 21.

[0151] In this arrangement, since the low-voltage unit 23 is located between the high-voltage unit 22 and the thermal management unit 24, the distance between the high-voltage unit 22 and the thermal management unit 24 is relatively far, reducing the interference between the high-voltage unit 22 and the thermal management unit 24 and improving the stability of the integrated cabinet 20.

[0152] The low-voltage unit 23 can have one or more low-voltage devices susceptible to electromagnetic interference, and the high-voltage unit 22 and the thermal management unit 24 can each have one or more high-voltage devices that are susceptible to electromagnetic interference. For example, the high-voltage devices in the high-voltage unit 22, such as the master control box 220 and the busbar, are susceptible to electromagnetic interference, and the water-cooled unit in the thermal management unit 24 is susceptible to electromagnetic interference. The power distribution module in the low-voltage unit 23 is susceptible to electromagnetic interference. In the above arrangement, by arranging the low-voltage unit 23 between the high-voltage unit 22 and the thermal management unit 24, the installation positions of the electromagnetic interference sources and the devices susceptible to electromagnetic interference can be separated by a certain distance to reduce electromagnetic interference.

[0153] As shown in FIG. 10, in a possible design, a first isolation structure 27 is arranged between the high-voltage unit 22 and the low-voltage unit 23, and / or a second isolation structure 28 is arranged between the low-voltage unit 23 and the thermal management unit 24.

[0154] The first isolation structure 27 is arranged between the high-voltage unit 22 and the low-voltage unit 23, and can separate the high-voltage area and the low-voltage area, so as to facilitate wiring and installation of each high-voltage electrical component in the high-voltage unit 22 and wiring and installation of each low-voltage electrical component in the low-voltage unit 23. The first isolation structure 27 can facilitate clear division of the installation area of the high-voltage unit 22 and the low-voltage unit 23, so that the distance between each high-voltage electrical component in the high-voltage unit 22 and each low-voltage electrical component in the low-voltage unit 23 is relatively far, and the high-voltage unit 22 and the low-voltage unit 23 can be maintained and managed respectively. The first isolation structure 27 can be a plate-shaped structure made of a material having an electromagnetic isolation effect. For example, the first isolation structure 27 can be made of an iron plate. In this arrangement, the first isolation structure 27 can reduce electromagnetic interference between the high-voltage unit 22 and the low-voltage unit 23, and improve the stability of the integrated cabinet 20. The first isolation structure 27 can also be a plate-shaped structure made of a material having a heat insulation effect. For example, the first isolation structure 27 can be made of a glass fiber plate.

[0155] The second isolation structure 28 is arranged between the low-voltage unit 23 and the thermal management unit 24, and separates the low-voltage area and the thermal management area, so as to facilitate wiring and installation of each low-voltage electrical component in the low-voltage unit 23 and installation of the structure in the thermal management unit. The second isolation structure 28 can facilitate clear division of the installation area of the low-voltage unit 23 and the thermal management unit 24, so that the distance between each low-voltage electrical component in the low-voltage unit 23 and the structure in the thermal management unit 24 is relatively far, the influence of heat and vibration generated in the working process of the thermal management unit 24 on the low-voltage unit 23 is reduced, and the low-voltage unit 23 and the thermal management unit 24 can be maintained and managed respectively. The second isolation structure 28 can be a plate-shaped structure made of a material having an electromagnetic isolation effect. For example, the second isolation structure 28 can be made of an iron plate. In this arrangement, the second isolation structure 28 can reduce electromagnetic interference between the thermal management unit 24 and the low-voltage unit 23, and improve the stability of the integrated cabinet 20. The second isolation structure 28 can also be a plate-shaped structure made of a material having a heat insulation effect, which can further reduce thermal interference between the thermal management unit 24 and the low-voltage unit 23. For example, the second isolation structure 28 can be made of a glass fiber plate.

[0156] In a possible design, one or more integrated cabinets 20 can be accommodated in a standard container, and / or the total mass of the one or more integrated cabinets 20 is less than or equal to 36,000 kg.

[0157] The single or multiple integrated cabinets 20 can be accommodated in a standard container, that is, in an embodiment, the size of the single or multiple integrated cabinets 20 is equal to the size of a standard container, and the single or multiple integrated cabinets 20 can be transported as a standard container. In another embodiment, the total size of the single or multiple integrated cabinets 20 is slightly smaller than the size of a standard container, so that the single or multiple integrated cabinets 20 can be accommodated in a standard container. During transportation, the single or multiple integrated cabinets 20 can be placed in a standard container for transportation.

[0158] The single or multiple integrated cabinets 20 can be accommodated in a standard container. For example, one integrated cabinet 20, two integrated cabinets 20, three integrated cabinets 20, four integrated cabinets 20 or more integrated cabinets 20 can be accommodated in a standard container. That is, a standard container can accommodate at most one integrated cabinet 20, two integrated cabinets 20, three integrated cabinets 20, four integrated cabinets 20 or more integrated cabinets 20, or the total size of two integrated cabinets 20, three integrated cabinets 20, four integrated cabinets 20 or more integrated cabinets 20 can be equal to the total size of a standard container.

[0159] The single or multiple integrated cabinets 20 can be accommodated in a standard container. In this arrangement, on the one hand, the single or multiple integrated cabinets 20 can be placed in a standard container for transportation during transportation, facilitating the movement during transportation. On the other hand, in the case that multiple integrated cabinets 20 can be accommodated in a standard container, the size of a single integrated cabinet 20 is smaller than the size of a standard container, so that the weight of a single integrated cabinet 20 is relatively smaller, facilitating the movement.

[0160] The total mass of the single or multiple integrated cabinets 20 is less than or equal to 36000kg. The total mass of the single integrated cabinet 20 can be less than or equal to 36000kg, the total mass of two integrated cabinets 20 can be less than or equal to 36000kg, the total mass of three integrated cabinets 20 can be less than or equal to 36000kg, and the total mass of four or more integrated cabinets 20 can be less than or equal to 36000kg.

[0161] The total mass of the single or multiple integrated cabinets 20 is less than or equal to 36000kg. In the case that the size of the single or multiple integrated cabinets 20 is equal to the size of a standard container, the total mass of the single or multiple integrated cabinets 20 is less than or equal to 36000kg. In the case that the total size of the single or multiple integrated cabinets 20 is slightly smaller than the size of a standard container, the total mass of the single or multiple integrated cabinets 20 is less than 36000kg, so that when the single or multiple integrated cabinets 20 are accommodated in a standard container, the total mass of the standard container and the single or multiple integrated cabinets 20 accommodated therein is less than or equal to 36000kg.

[0162] The total mass of the single or multiple integrated cabinets 20 is less than or equal to 36000kg, so that the single or multiple integrated cabinets 20 can be accommodated in a standard container, and the maximum total mass of the standard container meets the standard requirements, facilitating transportation.

[0163] During land transportation, the size of the transportation device (such as a vehicle) for transportation is usually adapted to transport a standard container, for example, the transportation device is adapted to transport a standard container. Since the single or multiple integrated cabinets 20 can be accommodated in a standard container, the transportation device is adapted to transport the single or multiple integrated cabinets 20, that is, the size of the integrated cabinet 20 is more suitable for the transportation device, the space utilization of the transportation device is relatively larger, facilitating transportation, and the transportation cost is relatively low. During sea transportation, sea transportation usually charges a standard container for space. If a non-standard container is used, the space occupied by the non-standard container is charged according to the size of the standard container adjacent to the non-standard container, that is, even if the size of the transported object is close to the size of a 20-foot container, the space is charged according to the size of a 20-foot container. In the embodiment, for example, if two integrated cabinets 20 can be accommodated in a 20-foot container, during sea transportation, the space occupied by the two integrated cabinets 20 is the same as that of a 20-foot container, or the two integrated cabinets 20 are placed in a 20-foot container for transportation, and the space is charged according to the size of a 20-foot container, and the transportation cost is relatively low.

[0164] In a specific embodiment, the size of the single integrated cabinet 20 is the size of a 20-foot container, the total size of the two energy storage cabinets 10 is the size of a 20-foot container, and the size of the single energy storage cabinet 10 is the size of a 10-foot container. In this arrangement, one integrated cabinet 20 is connected to a plurality of energy storage cabinets 10 to control the plurality of energy storage cabinets 10 in high-voltage electrical control, low-voltage electrical control and thermal management control. Since the size of the integrated cabinet 20 is larger than the size of the energy storage cabinet 10, more components can be integrated in the integrated cabinet 20 to facilitate control of the plurality of energy storage cabinets 10. Since the size of the energy storage cabinet 10 is smaller than the size of the integrated cabinet 20, the weight of the energy storage cabinet 10 is relatively light, facilitating overall transportation without the need for disassembly and transportation, thereby improving the assembly efficiency of the energy storage system 1 on site. Since the length of the two energy storage cabinets 10 is equal to the length of the integrated cabinet 20, and the width and height of the energy storage cabinet 10 and the integrated cabinet 20 are equal, the layout and installation of the integrated cabinet 20 and the plurality of energy storage cabinets 10 are facilitated, and the space utilization of the energy storage system 1 in a rectangular or similar rectangular space is higher.

[0165] In some embodiments, as shown in FIGS. 8, 9, 11 and 12, the energy storage system 1 comprises an energy storage converter 25 and a booster transformer 26, the energy storage converter can be installed in an external or internal manner, and the booster transformer can be installed in an external or internal manner. The internal installation means that it is installed in the integrated cabinet 20, and the external installation means that it is installed outside the energy storage cabinet 10 and the integrated cabinet 20.

[0166] As shown in FIG. 11, in a possible design, the energy storage cabinet 10 contains the battery unit 12 and the sampling unit, the integrated cabinet 20 contains the master control box 220, the low-voltage power distribution module, the battery management module, the water cooling unit and the fire control module, and the energy storage cabinet 10 and the integrated cabinet 20 are provided with the energy storage converter 25 and the booster transformer 26 outside.

[0167] The sampling module is used to detect the information of the battery unit 12, such as pressure information, temperature information, current information, voltage information, etc., and can be connected with the battery management module.

[0168] The battery management module (BMS) is connected with the battery unit 12, used for intelligently managing and maintaining the battery unit 12, monitoring the state of the battery unit 12, and reducing or even avoiding overcharging or overdischarging of the battery unit 12 to some extent, so as to prolong the service life of the battery. It is worth noting that the battery management module includes a plurality of high-voltage electrical components and a plurality of low-voltage electrical components, the high-voltage electrical components in the battery management module belong to the high-voltage unit 22 and are installed in the high-voltage area of the integrated cabinet 20, and the low-voltage electrical components in the battery management module belong to the low-voltage unit 23 and are installed in the low-voltage area of the integrated cabinet 20.

[0169] In the energy storage system 1, the low-voltage power distribution module and the fire control module belong to the low-voltage unit 23 and are installed in the low-voltage area of the integrated cabinet 20. The water cooling unit belongs to the thermal management unit 24 and is installed in the thermal management area of the integrated cabinet.

[0170] In some embodiments, when the energy storage converter 25 is installed outside the integrated cabinet 20 and located outside the energy storage cabinet 10, the energy storage converter 25 is installed on one side of the integrated cabinet 20 and adjacent to the master control box 220 located inside the integrated cabinet 20. In this arrangement, the energy storage converter 25 is located outside the integrated cabinet 20 and outside the area of the integrated cabinet 20 where the master control box 220 is installed, so that the distance between the energy storage converter 25 and the master control box 220 is relatively shorter, and the size of the connecting member required for the connection between the energy storage converter 25 and the master control box 220 is relatively smaller, thereby saving the connection cost. The energy storage converter 25 can be in contact with the outer wall of the integrated cabinet 20, or the energy storage converter 25 can be spaced apart from the integrated cabinet 20.

[0171] Exemplarily, the energy storage converter 25 is arranged outside the integrated cabinet 20 and adjacent to the integrated cabinet 20, and the energy storage converter 25b is arranged close to the region where the master control box 220 is arranged in the integrated cabinet 20, and the step-up transformer 26 is arranged adjacent to the energy storage converter 25. Exemplarily, the step-up transformer 26 is arranged on the side of the energy storage converter 25 away from the integrated cabinet 20.

[0172] In this arrangement, the energy storage converter 25 and the step-up transformer 26 are both arranged outside the integrated cabinet 20, and the space in the integrated cabinet 20 is relatively larger, and the weight of the integrated cabinet 20 is relatively lighter. The energy storage converter 25 and the step-up transformer 26 are both mounted outside the integrated cabinet 20, facilitating the maintenance and repair of the energy storage converter 25 and the step-up transformer 26 respectively.

[0173] As shown in FIG. 8, in a possible design, the energy storage cabinet 10 contains the battery unit 12 and the sampling unit, the integrated cabinet 20 contains the master control box 220, the low-voltage power distribution module, the battery management module, the water cooling unit, the fire control module and the energy storage converter 25, and the energy storage cabinet 10 and the integrated cabinet 20 are provided with the step-up transformer 26 outside.

[0174] In this arrangement, the energy storage converter 25 is integrated in the integrated cabinet 20, specifically, the energy storage converter 25 belongs to a part of the high-voltage unit 22 and is installed in the high-voltage region in the integrated cabinet 20. The step-up transformer 26 is arranged outside the integrated cabinet 20, so that the space in the integrated cabinet 20 is relatively larger, and the weight of the integrated cabinet 20 is relatively lighter.

[0175] As shown in FIG. 12, in a possible design, the energy storage cabinet 10 contains the battery unit 12 and the sampling unit, the integrated cabinet 20 contains the master control box 220, the low-voltage power distribution module, the battery management module, the water cooling unit, the fire control module, the energy storage converter 25 and the step-up transformer 26.

[0176] In this arrangement, the energy storage converter 25 and the step-up transformer 26 are both integrated in the integrated cabinet 20, improving the integration degree of the integrated cabinet 20 and facilitating the transportation of the energy storage system 1. Since the energy storage converter 25 and the step-up transformer 26 are integrated in the integrated cabinet 20, and the integrated cabinet 20 is transported to the destination after being assembled, during the transportation process, the integrated cabinet 20 is a whole, facilitating the transportation. After being transported to the destination, during the on-site installation process of the energy storage system 1, only the interface of the integrated cabinet 20 needs to be connected with the structure of one or more energy storage cabinets 10 matched, the wiring is relatively simpler, the operation steps are relatively less, and the on-site installation efficiency is higher.

[0177] As shown in FIG. 9, in a possible design, the energy storage cabinet 10 contains the battery unit 12 and the sampling unit, the integrated cabinet 20 contains the master control box 220, the low-voltage power distribution module, the battery management module, the water cooling unit, the fire control module and the step-up transformer 26, and the energy storage cabinet 10 and the integrated cabinet 20 are externally provided with the energy storage converter 25.

[0178] In this arrangement, the step-up transformer 26 is integrated in the integrated cabinet 20, the step-up transformer 26 belongs to the high-voltage unit 22, and the step-up transformer 26 is installed in the high-voltage area of the integrated cabinet 20. The step-up transformer 26 is connected to the energy storage converter 25, and the energy storage converter 25 is installed externally to the energy storage cabinet 10 and the integrated cabinet 20. For example, the energy storage converter 25 is arranged adjacent to the integrated cabinet 20, and the energy storage converter 25 is arranged adjacent to one side of the high-voltage area of the integrated cabinet 20, so as to reduce the distance between the master control box 220 and the step-up transformer 26, thereby reducing the length of the connection line between the energy storage converter 25 and the master control box 220, and reducing the length of the connection line between the energy storage converter 25 and the step-up transformer 26, and reducing the cost.

[0179] In the case where one integrated cabinet 20 is matched with multiple energy storage cabinets 10, each energy storage cabinet 10 is arranged adjacent to the integrated cabinet 20, so as to connect the structure in the energy storage cabinet 10 to the structure in the energy storage cabinet 10.

[0180] In a possible design, as shown in FIGS. 13 and 14, the number of energy storage cabinets 10 is multiple, the multiple energy storage cabinets 10 are arranged in an array, and at least one energy storage cabinet 10 is arranged on each of opposite sides of the integrated cabinet 20.

[0181] For example, as shown in FIG. 13, the number of energy storage cabinets 10 is four, and the four energy storage cabinets 10 can be arranged in two rows and two columns, and one column of two energy storage cabinets 10 is arranged on each of opposite sides of the integrated cabinet 20. In this arrangement, the four energy storage cabinets 10 are arranged adjacent to the integrated cabinet 20.

[0182] In another example, as shown in FIG. 14, the number of energy storage cabinets 10 is eight, and the eight energy storage cabinets 10 can be arranged in two rows and four columns, and two rows of two energy storage cabinets 10 are arranged on each of opposite sides of the integrated cabinet 20.

[0183] In this arrangement, the multiple energy storage cabinets 10 are arranged in an array, so as to facilitate the on-site assembly and wiring arrangement of the energy storage system 1 and reduce the wiring difficulty. The energy storage cabinets 10 are arranged on opposite sides of the integrated cabinet 20, so that the distance between the multiple energy storage cabinets 10 and the integrated cabinet 20 is relatively shorter, which is conducive to the connection between the energy storage cabinets 10 and the integrated cabinet 20.

[0184] As shown in FIG. 15, when the number of energy storage systems 1 is multiple, the multiple energy storage systems 1 can be arranged in sequence along a straight line, that is, the energy storage cabinet 10 of one energy storage system 1 can be arranged on one side of the energy storage cabinet 10 of another energy storage system 1.

[0185] In one specific embodiment of the present application, the energy storage system 1 comprises an energy storage cabinet 10 and an integrated cabinet 20, wherein:

[0186] The size of a single integrated cabinet 20 is the size of a 20-foot container, the total size of two energy storage cabinets 10 is the size of a 20-foot container, and the size of a single energy storage cabinet 10 is the size of a 10-foot container. The total mass of a single integrated cabinet 20 is less than or equal to 36000kg, and the total mass of two energy storage cabinets 10 is less than or equal to 36000kg.

[0187] The energy storage cabinet 10 is provided with a first high-voltage interface 111, a first low-voltage interface 112, and a fluid pipeline interface 113. The energy storage cabinet 10 can also be provided with a water cooling structure and a fire-fighting structure. The water cooling structure comprises a water cooling plate and a water cooling pipe. The water cooling plate has a liquid flow channel, and the battery unit 12 is in contact with the water cooling plate. The water cooling pipe is in communication with the liquid flow channel. The fire-fighting structure comprises a fire-fighting pipeline, a spray head, and a detection structure. The battery unit 12 is connected to the first high-voltage interface 111 and the first low-voltage interface 112, respectively. The water cooling pipe is connected to the fluid pipeline interface 113. The fire-fighting pipeline and the detection structure are connected to the first low-voltage interface 112.

[0188] The integrated cabinet 20 is provided with a high-voltage area, a low-voltage area, and a thermal management area, and is partitioned to install a high-voltage unit 22, a low-voltage unit 23, and a thermal management unit 24. The integrated cabinet 20 is provided with a second high-voltage interface 211, a second low-voltage interface 212, and a thermal management unit interface 213. The components in the high-voltage unit 22 are connected to the second high-voltage interface 211. The components in the low-voltage unit 23 are connected to the second low-voltage interface 212. The components in the thermal management unit 24 are connected to the thermal management unit interface 213. The second high-voltage interface 211 is connected to the first high-voltage interface 111. The second low-voltage interface 212 is connected to the first high-voltage interface 111. The thermal management unit interface 213 is connected to the fluid pipeline interface 113.

[0189] The high-voltage unit 22 comprises a master control box 220, which comprises at least one component or multiple components of a direct current bus, a direct current disconnector, a high-voltage relay, a protection fuse, and a current sensor.

[0190] The low-voltage unit 23 includes a low-voltage power distribution module and a control component part, the low-voltage power distribution module at least includes one or more of a molded case circuit breaker, a miniature circuit breaker, a 24V power supply module, a UPS backup power, and an emergency stop button component. The control component part at least includes one or more of a main battery management unit, a fire control module, an Ethernet unit, an optical fiber conversion module, an energy storage inverter controller, and an energy management module.

[0191] The thermal management unit 24 includes a water cooling unit.

[0192] The energy storage system 1 further includes a battery management module, high-voltage electrical components in the battery management module belong to the high-voltage unit 22, and low-voltage electrical components belong to the low-voltage unit 23.

[0193] The energy storage system 1 further includes an energy storage inverter 25 and a step-up transformer 26, the energy storage inverter 25 and the step-up transformer 26 can be installed externally or internally, the internal installation is installed in the integrated cabinet 20, and the external installation is installed outside the energy storage cabinet 10 and the integrated cabinet 20. When the internal installation is adopted, the energy storage inverter 25 and the step-up transformer 26 belong to a part of the high-voltage unit 22.

[0194] The energy storage cabinet 10 and the integrated cabinet 20 have the size of a standard container according to the international standard of the international organization ISO, and the size of the energy storage cabinet 10 is smaller than that of the integrated cabinet 20. For example, as shown in FIG. 2, the energy storage cabinet 10 is a standard ten-foot container, the length L1 of the energy storage cabinet 10 is 2991 mm (ten feet), the width W1 of the energy storage cabinet 10 is 2483 mm, and the height H1 of the energy storage cabinet 10 is 2896 mm. As shown in FIG. 10, the integrated cabinet 20 is a standard twenty-foot container, the length L2 of the integrated cabinet 20 is 6058 mm (20 feet), the width W2 of the integrated cabinet 20 is 2483 mm, and the height H2 of the integrated cabinet 20 is 2896 mm. One integrated cabinet 20 is connected to control multiple energy storage cabinets 10.

[0195] As shown in FIG. 1 and FIG. 10, the application further provides an integrated cabinet 20 applied to the energy storage system 1 provided in any of the above technical solutions, the integrated cabinet 20 includes a high-voltage unit 22, a low-voltage unit 23, and a thermal management unit 24, the high-voltage unit 22, the low-voltage unit 23, and the thermal management unit 24 are partitioned and arranged in a cabinet body of the integrated cabinet 20; the integrated cabinet 20 further includes a second high-voltage interface 211, a second low-voltage interface 212, and a thermal management unit interface 213.

[0196] The second high-voltage interface 211 of the integrated cabinet 20 can be connected with the first high-voltage interface 111 of the at least one energy storage cabinet 10, the second low-voltage interface 212 of the integrated cabinet 20 can be connected with the first low-voltage interface 112 of the at least one energy storage cabinet 10, and the thermal management unit interface 213 of the integrated cabinet 20 can be connected with the fluid pipeline interface 113 of the at least one energy storage cabinet 10.

[0197] Through the connection of the second high-voltage interface 211 and the first high-voltage interface 111, the high-voltage unit 22 of the integrated cabinet 20 is connected with the battery unit 12 in the at least one energy storage cabinet 10, so as to perform high-voltage electrical control on the battery unit 12 in the at least one energy storage cabinet 10 through the high-voltage unit 22.

[0198] Through the connection of the second low-voltage interface 212 and the first low-voltage interface 112, the low-voltage unit 23 of the integrated cabinet 20 is connected with the battery unit 12 in the at least one energy storage cabinet 10, so as to perform low-voltage electrical control on the battery unit 12 in the at least one energy storage cabinet 10 through the low-voltage unit 23.

[0199] Through the connection of the thermal management unit interface 213 and the fluid pipeline interface 113, the thermal management unit 24 of the integrated cabinet 20 can introduce fluid medium into the at least one energy storage cabinet 10.

[0200] It is worth noting that the features of the integrated cabinet 20 provided in the embodiments of the present application are the same as those of the integrated cabinet 20 in the energy storage system 1 provided in any of the above-mentioned embodiments, and will not be described here.

[0201] The integrated cabinet 20 provided in the embodiments of the present application is applied to the energy storage system 1. Since the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 are arranged in the integrated cabinet 20, and the second high-voltage interface 211 can be connected with the first high-voltage interface 111 of the energy storage cabinet 10, the second low-voltage interface 212 can be connected with the first low-voltage interface 112 of the energy storage cabinet 10, and the thermal management unit interface 213 can be connected with the fluid pipeline interface 113, the wiring operation between the integrated cabinet 20 and the energy storage cabinet 10 is facilitated, the connection is convenient, the integrated degree of the integrated cabinet 20 is high, and the transportation is facilitated. The distance between the high-voltage unit 22, the low-voltage unit 23 and the thermal management unit 24 in the integrated cabinet 20 and the battery unit 12 is increased, and the thermal interference during use of the battery unit 12 is small, thereby improving the stability of the integrated cabinet 20, and further improving the stability of the energy storage system 1.

[0202] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage system, characterized in that: include: At least one energy storage cabinet, wherein a battery unit is disposed in the energy storage cabinet, and the energy storage cabinet includes a first high-pressure interface, a first low-pressure interface, and a fluid pipeline interface; An integrated cabinet, wherein a high-voltage unit, a low-voltage unit, and a thermal management unit are provided in the integrated cabinet, and the integrated cabinet includes a second high-voltage interface, a second low-voltage interface, and a thermal management unit interface; Among them, one integrated cabinet is arranged corresponding to at least one energy storage cabinet, the second high-pressure interface of the integrated cabinet is connected to the first high-pressure interface of at least one energy storage cabinet, the second low-pressure interface of the integrated cabinet is connected to the first low-pressure interface of at least one energy storage cabinet, and the thermal management unit interface of the integrated cabinet is connected to the fluid pipeline interface of at least one energy storage cabinet.

2. The energy storage system according to claim 1, wherein: A single energy storage cabinet includes at least two battery clusters, two or more energy storage cabinets can be accommodated in a standard container, and / or the total mass of the two or more energy storage cabinets is less than or equal to 36,000 kg.

3. The energy storage system according to any one of claims 1 to 2, wherein: The energy storage cabinet further includes a DC / DC converter, which is connected to the battery unit and the high-voltage unit respectively.

4. The energy storage system according to any one of claims 1 to 3, wherein: One integrated cabinet is provided corresponding to N energy storage cabinets, and 2≤N≤8.

5. The energy storage system according to any one of claims 1 to 4, wherein: The thermal management unit includes a water cooling unit, and the fluid pipeline interface of the energy storage cabinet is configured to be connected to the interface of the thermal management unit, so that the thermal management unit performs thermal management on the battery unit.

6. The energy storage system according to any one of claims 1 to 5, characterized in that: The high-voltage unit includes at least a main control box, and the first high-voltage interface of the energy storage cabinet is configured to be connected to the second high-voltage interface, so that the high-voltage unit performs high-voltage electrical control on the battery unit.

7. The energy storage system according to claim 6, characterized in that: The main control box includes at least one component or multiple components of a DC busbar, a DC isolating switch, a high-voltage relay, a protective fuse, and a current sensor.

8. The energy storage system according to any one of claims 6 to 7, wherein: The high-voltage unit further includes at least an energy storage converter or a step-up transformer.

9. The energy storage system according to any one of claims 1 to 8, wherein: The low-voltage unit includes at least a low-voltage power distribution module and a control component part. The first low-voltage interface of the energy storage cabinet is configured to be connected to the second low-voltage interface, so that the low-voltage power distribution part and the control component part perform low-voltage electrical control on the battery unit.

10. The energy storage system according to claim 9, wherein: The low-voltage power distribution module includes at least one or more components of a molded case circuit breaker, a miniature circuit breaker, a 24V power supply module, a UPS backup power supply, and an emergency stop button.

11. The energy storage system according to any one of claims 9 to 10, characterized in that: The control component part includes at least one or more components of a main battery management unit, a fire control module, an Ethernet unit, a fiber optic conversion module, an energy storage converter controller, and an energy management module.

12. The energy storage system according to any one of claims 1 to 11, characterized in that: The low-voltage unit and the thermal management unit are disposed on both sides of the high-voltage unit.

13. The energy storage system according to any one of claims 1 to 12, characterized in that: A first isolation structure is provided between the high-voltage unit and the low-voltage unit, and / or a second isolation structure is provided between the low-voltage unit and the thermal management unit.

14. The energy storage system according to any one of claims 1 to 13, characterized in that: A single or multiple integrated cabinets can be accommodated in a standard container, and / or the total mass of a single or multiple integrated cabinets is less than or equal to 36,000 kg.

15. The energy storage system according to any one of claims 1 to 14, characterized in that: The energy storage cabinet accommodates the battery unit and the sampling unit, the integrated cabinet accommodates the main control box, the low-voltage power distribution module, the battery management module, the water cooling unit and the fire control module, and the energy storage cabinet and the integrated cabinet are externally provided with an energy storage converter and a step-up transformer.

16. The energy storage system according to any one of claims 1 to 14, characterized in that: The energy storage cabinet accommodates the battery unit and the sampling unit, the integrated cabinet accommodates the main control box, the low-voltage power distribution module, the battery management module, the water cooling unit, the fire control module and the energy storage converter, and the outside of the energy storage cabinet and the integrated cabinet are provided with a step-up transformer.

17. The energy storage system according to any one of claims 1 to 14, characterized in that: The energy storage cabinet accommodates the battery unit and the sampling unit, and the integrated cabinet accommodates a main control box, a low-voltage power distribution module, a battery management module, a water cooling unit, a fire control module, an energy storage converter and a step-up transformer.

18. The energy storage system according to any one of claims 1 to 17, characterized in that: There are multiple energy storage cabinets, which are distributed at intervals in an array shape, and at least one energy storage cabinet is respectively provided on two opposite sides of the integrated cabinet.

19. An integrated cabinet, characterized in that: include: A high-voltage unit, a low-voltage unit and a thermal management unit are partitioned and arranged in the cabinet body of the integrated cabinet; the integrated cabinet also includes a second high-voltage interface, a second low-voltage interface and a thermal management unit interface.

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