Cascaded energy storage battery cabin and energy storage system

Abstract

The embodiment of the utility model provides a cascading type energy storage battery cabin and an energy storage system.The cascading type energy storage battery cabin comprises a shell, a plurality of battery clusters and a plurality of installation supports, and the shell is provided with a containing space and comprises a bottom wall; the plurality of battery clusters are accommodated in the accommodating space, the plurality of battery clusters are sequentially connected in series through the connecting pieces, and the arrangement direction of the connecting piece between each battery cluster and the previous battery cluster is perpendicular to the arrangement direction of the connecting piece between each battery cluster and the next battery cluster; the plurality of mounting brackets are connected to the bottom wall, and one mounting bracket is connected with and supports one battery cluster. According to the cascade type energy storage battery cabin and the energy storage system provided by the embodiment of the invention, the potential difference between adjacent battery clusters is reduced, and the operation stability of each device is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of battery compartments, and specifically relates to a cascaded energy storage battery compartment and an energy storage system. Background Art

[0002] In recent years, with the development of wind power and photovoltaic power, the demand for power auxiliary services such as peak load regulation, frequency regulation, and smooth output has increased significantly, and energy storage technology has developed rapidly. Electrochemical energy storage has become the mainstream energy storage method due to its fast response, short construction period, flexible use, and high conversion efficiency. The energy storage battery compartment is a key unit in the electrochemical energy storage system. In a large-capacity electrochemical energy storage system, multiple battery packs are combined according to certain rules to form a group of battery clusters, and multiple groups of battery clusters are then integrated into an energy storage battery compartment according to certain rules.

[0003] At present, according to the power transmission technology route, electrochemical energy storage systems can be divided into two types: low-voltage boost type and high-voltage cascade type. The current market mainstream adopts low-voltage boost type. When the scale of energy storage power stations reaches more than 100 megawatts, low-voltage boost energy storage systems will have problems such as parallel capacity loss and parallel circulation on the DC side, affecting the safety and efficiency of energy storage power stations. As an emerging technical path, the high-voltage cascade energy storage system can solve the above problems by inverting and connecting the battery pack in series to achieve the purpose of boosting, and has fast response and high efficiency, which is suitable for large-capacity energy storage application scenarios.

[0004] However, due to the characteristics of high-voltage cascade, the voltage of the battery cluster will increase step by step through inversion and series connection, which may easily lead to excessive potential difference between different battery cluster racks, affecting the operating stability of various devices in the cascade energy storage battery compartment. Utility Model Content

[0005] The technical problem to be solved by the present application is to provide a cascaded energy storage battery compartment and energy storage system that can reduce the potential difference between adjacent battery clusters and improve the operating stability of each device.

[0006] In a first aspect, an embodiment of the present application provides a cascade energy storage battery compartment, comprising an outer shell, a plurality of battery clusters and a plurality of mounting brackets, wherein the outer shell has a accommodating space and includes a bottom wall; the plurality of battery clusters are accommodated in the accommodating space, the plurality of battery clusters are sequentially connected in series through connectors, and the setting direction of the connectors between each battery cluster and the previous battery cluster is perpendicular to the setting direction of the connectors between each battery cluster and the next battery cluster; the plurality of mounting brackets are connected to the bottom wall, and a mounting bracket connects and supports a battery cluster.

[0007] According to an embodiment of the first aspect of the present application, each connecting member forms a “J”-shaped connecting structure.

[0008] According to an embodiment of the first aspect of the present application, the connecting member is a copper busbar in the shape of a straight plate.

[0009] According to an embodiment of the first aspect of the present application, the cascade energy storage battery compartment also includes a first dehumidification device and a second dehumidification device arranged in the accommodating space, and the first dehumidification device and the second dehumidification device are symmetrically arranged along the geometric center of the outer shell.

[0010] According to an embodiment of the first aspect of the present application, the outer shell also includes a top wall arranged opposite to the bottom wall, and the cascade energy storage battery compartment also includes a fire-fighting device accommodated in the accommodating space, the fire-fighting device includes a main engine, a fire-fighting pipeline and a start-stop valve, the start-stop valve is connected to the main engine and is controlled to start and stop by the main engine, the fire-fighting pipeline is arranged on the top wall, and the orthographic projection of the fire-fighting pipeline to the bottom wall falls on each battery cluster.

[0011] According to an embodiment of the first aspect of the present application, the cross-section of the fire protection pipeline is circular.

[0012] According to an embodiment of the first aspect of the present application, the mounting bracket includes a cluster frame and a support beam, wherein the two ends of the support beam along the first direction are respectively connected to the cluster frame and the bottom wall, and the cross section of the support beam along the perpendicular direction is an annular structure.

[0013] According to an embodiment of the first aspect of the present application, the support beam includes a plurality of support walls, the support walls include a bottom plate and a top plate arranged opposite to each other along a first direction, a side plate connecting the top plate and the bottom plate, and a plurality of wing plates connecting the side plates, the plurality of wing plates are arranged in sequence at intervals along the first direction; the bottom plate, the top plate and the plurality of wing plates have the same cross-sectional shape along a direction perpendicular to the first direction.

[0014] According to an embodiment of the first aspect of the present application, the cluster frame and the support beam, and the support beam and the bottom wall are connected by screws.

[0015] In a second aspect, an embodiment of the present application further provides a cascade energy storage system, comprising a plurality of cascade energy storage battery compartments as in any embodiment of the first aspect of the present application.

[0016] The beneficial effect of the present application is that by arranging multiple battery clusters in series in sequence through connectors, and the setting direction of the connectors between each battery cluster and the previous battery cluster is perpendicular to the setting direction of the connectors between each battery cluster and the next battery cluster, compared with the method of arranging multiple battery clusters in a straight line through connectors, the potential difference between adjacent battery clusters can be improved, thereby improving the operating stability of each device in the cascade energy storage battery compartment and improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the top view of the structure of the cascade energy storage battery compartment provided by the embodiment of the first aspect of the present application;

[0019] Figure 2 It is a schematic diagram of the main structure of the cascade energy storage battery compartment provided by the embodiment of the first aspect of the present application;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting bracket in the cascade energy storage battery compartment provided by the embodiment of the first aspect of the present application;

[0021] Figure 4 It is a schematic diagram of the top structure of the cascade energy storage system provided in the second aspect embodiment of the present application.

[0022] In the figure, 100, cascade energy storage battery compartment; 10, outer shell; 11, bottom wall; 12, top wall; 20, battery cluster; 21, high-voltage box; 22, energy storage inverter; 23, battery pack; 30, mounting bracket; 31, cluster frame; 32, support beam; 321, support wall; 3211, bottom plate; 3212, top plate; 3213, side plate; 3214, wing plate; 40, connector; 50, first dehumidification equipment; 60, second dehumidification equipment; 70, fire-fighting device; 71, main unit; 72, fire-fighting pipeline; 101, accommodating space; X, first direction. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0025] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0028] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0029] Figure 1 It is a schematic diagram of the top view of the structure of the cascade energy storage battery compartment provided by the embodiment of the first aspect of the present application; Figure 2 It is a schematic diagram of the main structure of the cascade energy storage battery compartment provided by the embodiment of the first aspect of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting bracket in the cascade energy storage battery compartment provided in the embodiment of the first aspect of the present application.

[0030] like Figures 1 to 3As shown, an embodiment of the present application provides a cascade energy storage battery compartment 100, including an outer shell 10, a plurality of battery clusters 20 and a plurality of mounting brackets 30, the outer shell 10 having a containing space 101 and including a bottom wall 11; the plurality of battery clusters 20 are contained in the containing space 101, the plurality of battery clusters 20 are sequentially connected in series through connectors 40, and the setting direction of the connectors 40 between each battery cluster 20 and the previous battery cluster 20 is perpendicular to the setting direction of the connectors 40 between each battery cluster 20 and the next battery cluster 20; the plurality of mounting brackets 30 are connected to the bottom wall 11, and one mounting bracket 30 connects and supports one battery cluster 20.

[0031] The cascade energy storage battery compartment 100 is a new type of energy storage device, which is designed to directly boost the voltage of the battery cluster 20 and connect it to the high-voltage AC system in a modular cascade manner. It can achieve free conversion between electrical energy and chemical energy without the need for transformer boosting, and can provide flexible, fast and reliable starting power supply services for the local power grid.

[0032] The outer shell 10 is an external frame structure of the cascade energy storage battery compartment 100 , and is used to isolate the internal components of the cascade energy storage battery compartment 100 from the outside, thereby improving the sealing and stability of the working environment of the internal battery cluster 20 .

[0033] The housing 10 has a receiving space 101 and includes a bottom wall 11, which means that the housing 10 is a surrounding structure to separate the internal receiving space 101 from the outside. The bottom wall 11 is a wall structure in the housing 10 that contacts the ground and is used to support the battery cluster 20 and the mounting bracket 30 in the receiving space 101.

[0034] Exemplarily, in these embodiments of the present application, the outer shell 10 can be arranged to be composed of a main frame, a skin, and a container-type hatch, wherein the main frame is a component that plays a supporting role in the outer shell 10, and the skin and the container-type hatch together cover the main frame to form the aforementioned accommodating space 101.

[0035] The battery cluster 20 is a component for storing energy in the cascade energy storage battery compartment 100. In some embodiments, the battery cluster 20 can be configured to include a high-voltage box 21, an energy storage inverter 22, and a plurality of battery packs 23, wherein the plurality of battery packs 23 can be connected in series, in parallel, or in a mixed manner (having both series and parallel structures) to form an energy storage structure with a higher energy density.

[0036] At the same time, the number of battery clusters 20 can also be set to multiple, and the energy storage converters 22 of the battery clusters 20 are connected in series through the connector 40 (copper busbar), so that the cascaded energy storage battery compartment 100 can store more electrical energy, further improving the energy density of the energy stored in the cascaded energy storage battery compartment 100. For example, in some embodiments of the present application, a single battery compartment can be configured with multiple battery clusters 20, so that the capacity of the cascaded energy storage battery compartment 100 exceeds 3MWh.

[0037] Multiple battery clusters 20 are accommodated in the accommodation space 101, which means that multiple battery clusters 20 are stored in the accommodation space 101, so as to utilize the sealing property of the accommodation space 101 to reduce the possibility of each battery pack 23 contacting with the external water vapor environment, thereby improving the working environment stability and reliability of each battery cluster 20.

[0038] The multiple battery clusters 20 are connected in series in sequence, so that the voltage of the multiple battery clusters 20 can be increased step by step, wherein the voltage boost between adjacent battery clusters 20 can be close to 1kV (actually the voltage boost of a single cluster is about 921V), so that the transformer can be eliminated compared to the parallel connection between the battery clusters 20. The battery clusters 20 are connected by a connector 40, wherein the connector 40 can be set as a cable or other conductive connection member.

[0039] As a result, if the battery clusters 20 are arranged in a straight line and connected in series, the potential difference between the two sides of the battery cluster 20 may be too large due to voltage boost.

[0040] Based on this, in these embodiments of the present application, the setting direction of the connecting member 40 between each battery cluster 20 and the previous battery cluster 20 is perpendicular to the setting direction of the connecting member 40 between the subsequent battery cluster 20, which means that the series connection direction of each battery cluster 20 is extended along the broken line, thereby alleviating the potential difference between the battery cluster 20 and other battery clusters 20 on both sides along the series connection direction, thereby improving the operating stability and reliability of each device in the cascade energy storage battery compartment 100.

[0041] For example, in these embodiments of the present application, it can be assumed that any battery cluster 20 among the multiple battery clusters 20 (excluding the two at the two ends) is N, and the connector 40 between the Nth battery cluster 20 and the N-1th battery cluster 20 can be arranged along the first direction X, and the connector 40 between the N+1th battery cluster 20 can be arranged along the second direction Y, wherein the first direction X is perpendicular to the second direction Y. In this way, the series connection path of the multiple battery clusters 20 can be arranged in a zigzag shape, thereby alleviating the influence of the potential difference formed on the opposite sides of each battery cluster 20.

[0042] The function of the mounting bracket 30 is to support each battery cluster 20, to provide positioning for each battery cluster 20 before the battery cluster 20 is installed in the cascade energy storage battery compartment 100, and to fix the installation position. In these embodiments of the present application, the number of mounting brackets 30 and the number of battery clusters 20 can be the same, and one mounting bracket 30 is connected to and supports one battery cluster 20.

[0043] The mounting bracket 30 is connected to the bottom wall 11. A possible implementation method is that the mounting bracket 30 and the bottom wall 11 can be detachably connected by detachable connectors such as screws, bolts or studs to facilitate subsequent maintenance or replacement of a single battery cluster 20, thereby further improving the reliability of the cascaded energy storage battery compartment 100.

[0044] According to an embodiment of the first aspect of the present application, each connector 40 forms a "J"-shaped connection structure. In this way, the arrangement of the multiple battery clusters 20 in the accommodation space 101 can be further simplified, that is, the multiple battery clusters 20 form an array distribution structure with two rows and multiple columns, and after the two battery clusters 20 at the two ends of the multiple battery clusters 20 connected in series are connected to the external power line, the multiple battery clusters 20 are connected in series to form an integral structure.

[0045] According to the cascade energy storage battery compartment 100 of the embodiment of the present application, a plurality of battery clusters 20 are connected in series in sequence through connectors 40, and the setting direction of the connector 40 between each battery cluster 20 and the previous battery cluster 20 is perpendicular to the setting direction of the connector 40 between each battery cluster 20 and the next battery cluster 20. Compared with the arrangement of a plurality of battery clusters 20 along a straight line through connectors 40, the potential difference between adjacent battery clusters 20 can be improved, thereby improving the operating stability of each device in the cascade energy storage battery compartment 100 and improving reliability.

[0046] According to an embodiment of the first aspect of the present application, the connector 40 is a straight copper bar. In this way, screws can be used to connect two different battery clusters 20 at both ends of the copper bar to achieve quick connection of the connector 40, thereby improving the installation efficiency of the cascade energy storage battery compartment 100 and the subsequent maintenance or replacement disassembly efficiency, and improving reliability.

[0047] According to an embodiment of the first aspect of the present application, the cascade energy storage battery compartment 100 also includes a first dehumidification device 50 and a second dehumidification device 60 arranged in the accommodating space 101, and the first dehumidification device 50 and the second dehumidification device 60 are symmetrically arranged along the geometric center of the outer shell 10.

[0048] In these embodiments of the present application, the first dehumidification device 50 and the second dehumidification device 60 are arranged in the accommodating space 101, which means that the first dehumidification device 50 and the second dehumidification device 60 are connected to the outer shell 10 respectively to jointly dehumidify the accommodating space 101 at different positions of the accommodating space 101.

[0049] The first dehumidification device 50 and the second dehumidification device 60 are symmetrically arranged along the geometric center of the outer shell 10. A possible fact is that, in an embodiment in which the outer shell 10 is a rectangular frame structure, the first dehumidification device 50 and the second dehumidification device 60 can be arranged at two diagonal positions of the outer shell 10 respectively to dehumidify the accommodating space 101 as a whole.

[0050] In these embodiments of the present application, the first dehumidification device 50 can be set as a dehumidifier, and the second dehumidification device 60 can be set as a dehumidifying air conditioner. The two cooperate to improve the dryness in the storage space 101, reduce the possibility of water vapor condensing into condensed water in the storage space, and thus causing battery pack circuits, and have higher reliability.

[0051] According to an embodiment of the first aspect of the present application, the outer shell 10 also includes a top wall 12 arranged opposite to the bottom wall 11, and the cascade energy storage battery compartment 100 also includes a fire-fighting device 70 accommodated in the accommodating space 101. The fire-fighting device 70 includes a main unit 71, a fire-fighting pipeline 72 and a start-stop valve. The start-stop valve is connected to the main unit 71 and is started and stopped by the main unit 71. The fire-fighting pipeline 72 is arranged on the top wall 12, and the orthographic projection of the fire-fighting pipeline 72 to the bottom wall 11 falls on each battery cluster 20.

[0052] The function of the fire-fighting device 70 is to improve the safety performance of the cascade energy storage battery compartment 100, so as to timely reduce the possibility of fire spreading in the accommodation space 101 when the battery cluster 20 has thermal runaway. Among them, the function of the host 71 is to control the opening and closing of the start-stop valve. In some embodiments, the fire-fighting device 70 may also include a temperature sensor or a smoke sensor connected to the host 71, so that the host 71 can monitor the environmental state in the accommodation space 101, and then respond to open or close the start-stop valve in the first time.

[0053] The fire fighting pipeline 72 is provided with a pressurized fire fighting medium, so that when the start-stop valve is opened, the fire fighting medium is sprayed into the accommodation space 101 through the sprinkler in the fire fighting pipeline 72 to minimize the loss. The fire fighting pipeline can be a gas extinguishing pipeline or a water fire fighting pipeline, wherein the water fire fighting pipeline can refer to the water sprinkler for building fire fighting, and the fire fighting medium in the gas extinguishing pipeline can be perfluorohexanone or heptafluoropropane.

[0054] In these embodiments of the present application, the fire-fighting pipe 72 is arranged on the top wall 12, and the orthographic projection of the fire-fighting pipe 72 onto the bottom wall 11 falls on each battery cluster 20. In this way, the fire-fighting pipe 72 can be more specifically aimed at the battery cluster 20 to reduce the risk of greater damage to the battery cluster 20 due to thermal runaway from the source.

[0055] In these embodiments of the present application, a cascade energy storage battery compartment 100 has a complete set of fire-fighting devices 70 to improve the targeted control of thermal runaway risks in the cascade energy storage system. A separate fire-fighting can be carried out on a cascade energy storage battery compartment 100 that has thermal runaway, thereby reducing the damage of thermal runaway to the entire cascade energy storage system.

[0056] According to an embodiment of the first aspect of the present application, the cross section of the fire-fighting pipeline 72 is circular, that is, the possibility of the fire-fighting pipeline 72 having sharp corners in the accommodation space 101 is reduced, so that the probability of the battery cluster 20 in the accommodation space 101 causing high-voltage arcing at the sharp corners can be reduced, and the reliability of the cascaded energy storage battery compartment 100 is further improved.

[0057] According to an embodiment of the first aspect of the present application, the mounting bracket 30 includes a cluster frame 31 and a support beam 32, the support beam 32 is connected to the cluster frame 31 and the bottom wall 11 at both ends along the first direction X, and the support beam 32 has a ring-shaped structure along a cross section perpendicular to the first direction X.

[0058] The mounting bracket 30 is a component in the cascade energy storage battery compartment 100 for supporting and mounting the battery cluster 20. The supporting beam 32 is connected to the cluster frame 31 and the bottom wall 11 at both ends along the first direction X, respectively. This means that during the assembly process of the cascade energy storage battery compartment 100, each supporting beam 32 can be first connected to the bottom wall 11 according to the position where the battery cluster 20 needs to be placed, and then the cluster frame 31 can be installed to each supporting beam 32, and finally the battery cluster 20 can be installed to each supporting beam 32. In this way, the mounting bracket 30 is used to provide stable support and positioning for each battery cluster 20, and it is also convenient to connect multiple battery clusters 20 in series using the connecting piece 40 later.

[0059] In these embodiments of the present application, the cross section of the support beam 32 along the perpendicular direction X is an annular structure to form a more stable support structure in the first direction X. For example, in some embodiments, the cross section of the support beam 32 along the perpendicular direction X may be a rectangular annular structure, and in some embodiments, the cross section of the support beam 32 along the perpendicular direction X may be a circular annular structure.

[0060] According to an embodiment of the first aspect of the present application, the support beam 32 includes a plurality of support walls 321, the support wall 321 includes a bottom plate 3211 and a top plate 3212 arranged relatively to each other along a first direction X, a side plate 3213 connecting the top plate 3212 and the bottom plate 3211, and a plurality of wing plates 3214 connecting the side plates 3213, the plurality of wing plates 3214 are arranged in sequence at intervals along the first direction X; the bottom plate 3211, the top plate 3212 and the plurality of wing plates 3214 have the same cross-sectional shape along a direction perpendicular to the first direction X.

[0061] The support beam 32 includes a plurality of support walls 321, which means that the support beam 32 is surrounded by a plurality of support walls 321 to form a ring structure along a direction perpendicular to the first direction X. In these embodiments of the present application, there are four support walls 321, and the four support walls 321 are connected end to end to form a rectangular ring structure.

[0062] The support wall 321 includes a bottom plate 3211 and a top plate 3212 which are arranged relatively along the first direction X, and a side plate 3213 connecting the top plate 3212 and the bottom plate 3211. A possible implementation is that the bottom plate 3211 and the top plate 3212 can be arranged parallel to and perpendicular to the first direction X, and the side plate 3213 is a plate-like structure parallel to the first direction X. In this way, the cross-sectional shape of the above-mentioned structure of the support wall 321 along the cross-section parallel to the first direction X is in the shape of an "I". The "I"-shaped structure of the support wall 321 is conducive to connection with the above-mentioned cluster frame 31 and the bottom wall 11, and has good structural strength.

[0063] A plurality of wing plates 3214 are connected to the side plates 3213 and are arranged in sequence along the first direction X at intervals, which means that the wing plates 3214 are plate-like structures parallel to the bottom plate 3211 and the top plate 3212. In these embodiments of the present application, a plurality of wing plates 3214 are arranged in sequence along the first direction X at intervals, and the bottom plate 3211, the top plate 3212 and the plurality of wing plates 3214 have the same cross-sectional shape perpendicular to the first direction X, so that the plurality of wing plates 3214 arranged in sequence along the first direction X provide sufficient electrical clearance for the battery cluster 20, thereby significantly increasing the creepage distance of the battery cluster 20.

[0064] According to an embodiment of the first aspect of the present application, the cluster frame 31 and the support beam 32, as well as the support beam 32 and the bottom wall 11 are connected by screws. In this way, the cluster frame 31 and the support beam 32 can be repaired or replaced by being disassembled separately, which can effectively improve the repair or replacement efficiency of the cluster frame 31 or the support beam 32.

[0065] Figure 4 It is a schematic diagram of the top structure of the cascade energy storage system provided in the second aspect embodiment of the present application.

[0066] like Figures 1 to 4As shown, the embodiment of the present application also provides a cascade energy storage system, including a plurality of cascade energy storage battery compartments 100 as in any embodiment of the first aspect of the present application. Compared with the cascade energy storage systems in the related art, different cascade energy storage battery compartments have different technical states, different cabin wiring harness lengths or cabin accessories, and the setting methods that easily affect on-site hoisting and site distribution, the cascade energy storage battery compartments 100 of the embodiment of the present application adopt a unified design, which can be freely combined, convenient wiring, and reduce the workload of on-site communication line installation. The power line inlets and outlets of the battery compartment are corresponding, which can facilitate power line wiring. When multiple compartments are cascaded, a control box is installed on the single-end cabin, which integrates the main control and fire control, which can be easily operated from the outside by people without opening the cabin door for inspection, thereby increasing the convenience of operation and maintenance.

[0067] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0068] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A cascade energy storage battery compartment (100), It is characterized in that include: A housing (10) having a receiving space (101) and including a bottom wall (11); A plurality of battery clusters (20) are accommodated in the accommodation space (101), the plurality of battery clusters (20) are sequentially connected in series via a connector (40), and the arrangement direction of the connector (40) between each battery cluster (20) and the previous battery cluster (20) is perpendicular to the arrangement direction of the connector (40) between each battery cluster (20) and the next battery cluster (20); A plurality of mounting brackets (30) are connected to the bottom wall (11), and one mounting bracket (30) is connected to and supports one battery cluster (20).

2. The cascade energy storage battery compartment (100) according to claim 1, It is characterized in that Each of the connecting pieces (40) forms a "J"-shaped connecting structure.

3. The cascade energy storage battery compartment (100) according to claim 2, It is characterized in that The connecting piece (40) is a copper bar in the shape of a straight plate.

4. The cascade energy storage battery compartment (100) according to claim 1, It is characterized in that The cascade energy storage battery compartment (100) further comprises a first dehumidification device (50) and a second dehumidification device (60) arranged in the accommodating space (101), wherein the first dehumidification device (50) and the second dehumidification device (60) are symmetrically arranged along the geometric center of the outer shell (10).

5. The cascade energy storage battery compartment (100) according to claim 1, It is characterized in that The housing (10) further comprises a top wall (12) arranged opposite to the bottom wall (11); the cascade energy storage battery compartment (100) further comprises a fire-fighting device (70) accommodated in the accommodation space (101); the fire-fighting device (70) comprises a main unit (71), a fire-fighting pipeline (72) and a start-stop valve; the start-stop valve is connected to the main unit (71) and is started and stopped by the main unit (71); the fire-fighting pipeline (72) is arranged on the top wall (12); and an orthographic projection of the fire-fighting pipeline (72) onto the bottom wall (11) falls on each of the battery clusters (20).

6. The cascade energy storage battery compartment (100) according to claim 5, It is characterized in that The cross section of the fire fighting pipeline (72) is circular.

7. The cascade energy storage battery compartment (100) according to claim 1, It is characterized in that The mounting bracket (30) comprises a cluster frame (31) and a support beam (32), wherein two ends of the support beam (32) along a first direction are respectively connected to the cluster frame (31) and the bottom wall (11). The support beam (32) has a ring-shaped structure in a cross section along a direction perpendicular to the first direction.

8. The cascade energy storage battery compartment (100) according to claim 7, It is characterized in that The support beam (32) comprises a plurality of support walls (321), the support walls (321) comprising a bottom plate (3211) and a top plate (3212) arranged opposite to each other along the first direction, a side plate (3213) connecting the top plate (3212) and the bottom plate (3211), and a plurality of wing plates (3214) connecting the side plates (3213), the plurality of wing plates (3214) being arranged in sequence and spaced apart along the first direction; The bottom plate (3211), the top plate (3212) and the plurality of wing plates (3214) have the same cross-sectional shape along a direction perpendicular to the first direction.

9. The cascade energy storage battery compartment (100) according to claim 7, It is characterized in that The cluster frame (31) and the support beam (32), as well as the support beam (32) and the bottom wall (11) are connected via screws.

10. A cascade energy storage system, It is characterized in that It comprises a cascade energy storage battery compartment (100) as described in any one of claims 1 to 9.

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