Energy storage system

Abstract

The invention provides an energy storage system, and the system comprises a first energy storage unit which comprises a first power module, a first filtering module, a first control box, and a plurality of first battery modules; the first control box is located below the multiple first battery modules, and the first filtering module and the first power module are arranged side by side and located below the first control box; the second energy storage unit is arranged opposite to the first energy storage unit, and the second energy storage unit comprises a second power module and a plurality of second battery modules electrically connected with the second power module; the third energy storage unit is arranged on one side of the first energy storage unit and the second energy storage unit, and the third energy storage unit comprises a power module III and a plurality of battery modules III electrically connected with the power module III; wherein the power module I, the power module II and the power module III are connected to a power grid after being connected in three stages. According to the technical scheme, the problems of low space utilization efficiency and low maintenance efficiency of the layout mode of the energy storage system in the related technology are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to an energy storage system. BACKGROUND

[0002] In the field of high-voltage cascaded energy storage technology, the traditional energy storage system design often follows a relatively simple layout logic, in which the energy storage unit (battery cluster) and the power conversion system (including energy storage converter PCS, filter module, etc.) are usually designed in different physical spaces or arranged in a scattered manner, and the position of the control box (such as the battery cluster high-voltage box) is often set at the top of the energy storage system to facilitate the outgoing and connection of cables.

[0003] In the related art energy storage system, the arrangement of the energy storage unit (battery cluster) and the power conversion system (including energy storage converter, filter module, etc.) is often not optimized. The connection lines between the energy storage unit and the control box and the power module are relatively long, not only occupying additional space, but also increasing the complexity and cost of the installation of the energy storage system. The high position design of the power module and the filter module makes it difficult for routine maintenance and fault repair, which requires high-altitude work and increases the time and cost of maintenance. In addition, the control box (such as the battery cluster high-voltage box) is in a relatively inaccessible position, which also affects the real-time monitoring and maintenance of the system state, reducing the maintenance efficiency of the energy storage system.

[0004] Therefore, the layout of the energy storage system in the related art has the problems of low space utilization efficiency and low maintenance efficiency. SUMMARY

[0005] The main purpose of the present application is to provide an energy storage system to solve the problem of low space utilization efficiency and low maintenance efficiency of the layout of the energy storage system in the related art.

[0006] In order to achieve the above-mentioned purpose, the present application provides an energy storage system, comprising: a first energy storage unit, comprising a power module one, a filter module one, a control box one and a plurality of battery modules one, the control box one being electrically connected with the plurality of battery modules one, and the power module one being electrically connected with the control box one via the filter module one; the control box one being located below the plurality of battery modules one, and the filter module one and the power module one being arranged side by side and both being located below the control box one; a second energy storage unit, being arranged opposite to the first energy storage unit, the second energy storage unit comprising a power module two and a plurality of battery modules two electrically connected with the power module two; a third energy storage unit, being arranged on one side of the first energy storage unit and the second energy storage unit, the third energy storage unit comprising a power module three and a plurality of battery modules three electrically connected with the power module three; wherein the power module one, the power module two and the power module three are connected in series and connected to a power grid.

[0007] Further, the plurality of battery modules form a first battery cluster and a second battery cluster, the first battery cluster and the second battery cluster are arranged in a horizontal direction, the first battery cluster and the second battery cluster each include a plurality of battery modules arranged in a vertical direction, the first control cabinet is two, a first control cabinet is arranged below the first battery cluster and is electrically connected with the plurality of battery modules in the first battery cluster, a second control cabinet is arranged below the second battery cluster and is electrically connected with the plurality of battery modules in the second battery cluster, the filter module and the power module are arranged below the first control cabinet.

[0008] Further, the first energy storage unit is a plurality of, the plurality of battery clusters of the plurality of first energy storage units and the plurality of battery clusters of the second energy storage unit are arranged alternately.

[0009] Further, the plurality of battery modules form a first battery cluster and a second battery cluster, the first battery cluster and the second battery cluster are arranged in a horizontal direction, the first battery cluster and the second battery cluster each include a plurality of battery modules arranged in a vertical direction, the first control cabinet is two, a first control cabinet is arranged below the first battery cluster and is electrically connected with the plurality of battery modules in the first battery cluster, a second control cabinet is arranged below the second battery cluster and is electrically connected with the plurality of battery modules in the second battery cluster, the filter module and the power module are arranged below the first control cabinet.

[0010] Further, the battery positive and negative electrode interfaces of the two control cabinets are connected in parallel on the battery positive and negative electrode interfaces of the filter module, the battery positive and negative electrode interfaces of each control cabinet are connected with the battery positive and negative electrode interfaces of the filter module through the first cable; the positive and negative electrode interfaces of the power module are connected in series with the positive and negative electrode interfaces of the filter module through the first copper bar; and / or, the positive and negative electrode interfaces of the power module are connected in series with the positive and negative electrode interfaces of the power module two through the second cable.

[0011] Further, the energy storage system further includes a second copper bar, a third copper bar, a battery cabin first cable input end and a cable terminal head; the battery cabin first cable input end is connected with the second copper bar through the cable terminal head, and the second copper bar is connected to the output negative electrode interface of the power module one of the first first energy storage unit; the first end of the third copper bar is connected to the output positive electrode interface of the power module one of the first first energy storage unit, and the second end of the third copper bar is connected to the output negative electrode interface of the power module one of the second first energy storage unit.

[0012] Further, the second copper bar comprises a first bar segment, a second bar segment and a third bar segment connected with each other, the first bar segment is connected with the cable terminal head, the third bar segment is connected with the output negative pole interface of the first power module of the first energy storage unit, the second bar segment is connected between the first bar segment and the third bar segment, and the first bar segment and the third bar segment are arranged in parallel; and / or, the third copper bar comprises a fourth bar segment and a fifth bar segment connected with each other, the fourth bar segment is connected with the output positive pole interface of the first power module of the first energy storage unit, the fifth bar segment is connected with the output negative pole interface of the first power module of the second energy storage unit, and the fourth bar segment and the fifth bar segment are arranged in parallel and connected through the conductive plate.

[0013] Further, the energy storage system further comprises a first support, a second support and a third support, the first support is provided with a plurality of first placement layer plates for placing a plurality of battery modules one, the second support is provided with a plurality of second placement layer plates for placing a plurality of battery modules two, and the third support is provided with a plurality of third placement layer plates for placing a plurality of battery modules three; the first placement layer plates, the second placement layer plates and the third placement layer plates are arranged in the same horizontal plane.

[0014] Further, the first support comprises a first frame body and a second frame body, the first frame body comprises a plurality of first placement layer plates for placing a battery cluster one, the first frame body is provided with a first placement position for placing a control box one, a second placement position for placing a power module one and a third placement position for placing a filter module one, the second placement position and the third placement position are arranged in the same horizontal plane and are both below the first placement position; the second frame body comprises a plurality of first placement layer plates for placing a battery cluster two, and the second frame body is provided with a fourth placement position for placing the control box one, and the second placement position and the fourth placement position are arranged in the same horizontal plane.

[0015] Further, the energy storage system further comprises a first liquid cooling radiator and a second liquid cooling radiator, the plurality of battery modules one are connected in series through a first liquid cooling pipeline, the plurality of battery modules two are connected in series through a second liquid cooling pipeline, and the plurality of battery modules three are connected in series through a third liquid cooling pipeline, the first liquid cooling pipeline, the second liquid cooling pipeline and the third liquid cooling pipeline are connected in parallel on the first liquid cooling radiator; the power module one is connected in communication with the second liquid cooling radiator through a fourth liquid cooling pipeline, the power module two is connected in communication with the second liquid cooling radiator through a fifth liquid cooling pipeline, the power module three is connected in communication with the second liquid cooling radiator through a sixth liquid cooling pipeline, and the fourth liquid cooling pipeline, the fifth liquid cooling pipeline and the sixth liquid cooling pipeline are connected in parallel on the second liquid cooling radiator.

[0016] The technical scheme of the application is applied to a storage system comprising a first storage unit, a second storage unit and a third storage unit. The first storage unit comprises a power module one, a filter module one, a control box one and a plurality of battery modules one, the control box one is electrically connected with the plurality of battery modules one, and the power module one is electrically connected with the control box one via the filter module one. The control box one is located below the plurality of battery modules one, and the filter module one and the power module one are arranged side by side and are both located below the control box one. The second storage unit is arranged opposite to the first storage unit, and the second storage unit comprises a power module two and a plurality of battery modules two electrically connected with the power module two. The third storage unit is arranged on one side of the first storage unit and the second storage unit, and the third storage unit comprises a power module three and a plurality of battery modules three electrically connected with the power module three. The power module one, the power module two and the power module three are connected in series and connected to a power grid. In this way, by arranging the second storage unit opposite to the first storage unit, and vertically layering the power module one, the filter module one and the control box one, the integration and the modularization level of the storage system are improved, and the space utilization efficiency is improved. By arranging the control box one below the battery modules one, and arranging the power module one and the filter module one side by side below the control box one, the length of the connection line between the modules is effectively reduced, and the energy consumption and the cost are reduced. Secondly, the modularized layout facilitates maintenance and upgrading, the functions of each module are clearly divided, once a problem occurs in a module, the module can be quickly located and replaced, without the need for large-scale and complicated disassembly and wiring operation, and the maintenance efficiency is improved. Moreover, the above arrangement facilitates the maintenance of the control box one, the power module one and the filter module one, and avoids climbing maintenance, and the maintenance efficiency is improved. Moreover, the series connection of the power module one, the power module two and the power module three can flexibly adapt to different scales of the power grid demand, and realize efficient utilization and management of energy. Therefore, the technical scheme of the application effectively solves the problems of low space utilization efficiency and low maintenance efficiency of the layout mode of the storage system in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the description of the application, explain the application. The drawings provided in the accompanying specification do not limit the application in any way.

[0018] Figure 1 a perspective structural schematic diagram of an embodiment of the storage system according to the application is shown;

[0019] Figure 2 a top view schematic diagram of the storage system of Figure 1 is shown;

[0020] Figure 3 a top view schematic diagram of the storage system of Figure 1A front view of the first and third energy storage units of the energy storage system;

[0021] Figure 4 Out Figure 1 A schematic diagram showing the connection between power module one and filter module one of the energy storage system;

[0022] Figure 5 Out Figure 1 A three-dimensional structural diagram of the first energy storage unit of the energy storage system.

[0023] The above figures include the following reference numerals:

[0024] 10. First energy storage unit; 11. Power module one; 12. Filter module one; 13. Control box one; 14. Battery cluster one; 15. Battery cluster two; 16. Battery module one;

[0025] 20. Second energy storage unit; 22. Battery module two;

[0026] 30. Third energy storage unit; 31. Power module three; 32. Filter module two; 33. Control box two; 34. Battery cluster three; 36. Battery module three;

[0027] 40. Second copper section; 41. First section; 42. Second section; 43. Third section;

[0028] 50. Third copper busbar; 51. Fourth section; 52. Fifth section; 53. Conductive plate;

[0029] 61. Battery compartment primary cable input terminal; 62. Cable termination head; 63. Battery compartment primary cable output terminal;

[0030] 71. First support; 711. First frame; 712. Second frame; 713. First shelf;

[0031] 72. Second support;

[0032] 73. Third support; 731. Third shelf;

[0033] 81. First liquid-cooled radiator; 82. Second liquid-cooled radiator; 821. Fourth liquid-cooled piping; 822. Sixth liquid-cooled piping;

[0034] 91. BMS control cabinet; 92. Fire-fighting equipment; 93. Fan; 94. Battery compartment drain hole; 95. Fiber optic splice box. Detailed Implementation

[0035] Clearly, the described embodiments are only some, but not all, embodiments of the present application. Various modifications and changes can be made thereto by those skilled in the art which freelyproceed from the concepts disclosed herein without departing from the spirit of the application. It is therefore intended that the disclosed application be considered as in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

[0036] It is also noted that the embodiments can be described as a process, which is depicted as a flowchart, a flow diagram, a flow chart, a flow diagram, and / or a sequence diagram. Although a variety of elements are presented with respect to the method, the order in which the elements are presented on the flow diagram is not meant to be limiting and only suggests one scheduling of elements. It will be appreciated by persons skilled in the art that the blocks that are presented can be implemented in any order that is numerically, chronologically or otherwise. Further, the method can include additional or fewer processes or elements. It will further be appreciated that the method can include any other additional processes or elements not specifically mentioned. It will also be understood that the method can be implemented by a computer program, software, or firmware incorporated in a computer system or other entity.

[0037] Unless specifically stated otherwise, the relative arrangements of the components and steps exemplified in the embodiments and the numerical expressions and values set forth herein are not limiting and are intended to be illustrative only. It is to be understood that the various techniques and methods described herein can be used in other embodiments and that the elements and components described herein can be arranged and configured in a variety of other ways. For example, the order in which the steps are presented is not essential for achieving the desired result, and one skilled in the art will recognize that the steps can be performed in other orders. Furthermore, the described embodiments can be implemented in other ways than those specifically set forth herein. It is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting. As such, those skilled in the art will recognize that the exemplary embodiments can be practiced with modification and alteration, and have different steps and / or components than those of the embodiments as described and illustrated.

[0038] In the embodiment, the energy storage system includes a first energy storage unit 10, a second energy storage unit 20, and a third energy storage unit 30. The first energy storage unit 10 includes a power module one 11, a filter module one 12, a control box one 13, and a plurality of battery modules one 16, the control box one 13 is electrically connected with the plurality of battery modules one 16, and the power module one 11 is electrically connected with the control box one 13 via the filter module one 12. The control box one 13 is located below the plurality of battery modules one 16, and the filter module one 12 and the power module one 11 are arranged side by side and are both located below the control box one 13. The second energy storage unit 20 is arranged opposite to the first energy storage unit 10, and the second energy storage unit 20 includes a power module two and a plurality of battery modules two 22 electrically connected with the power module two. The third energy storage unit 30 is arranged on one side of the first energy storage unit 10 and the second energy storage unit 20, and the third energy storage unit 30 includes a power module three 31 and a plurality of battery modules three 36 electrically connected with the power module three 31. The power module one 11, the power module two, and the power module three 31 are connected in cascade and connected to the power grid.

[0039] In this way, by arranging the second energy storage unit 20 opposite to the first energy storage unit 10, and vertically layering the power module one 11, the filter module one 12, and the control box one 13, the integration and the modularization level of the energy storage system are significantly improved, and the space utilization efficiency is improved. By arranging the control box one 13 below the battery modules one 16, and arranging the power module one 11 and the filter module one 12 side by side below the control box one 13, the length of the connection line between the modules is effectively reduced, and the energy consumption and the cost are reduced. Secondly, the modularized layout facilitates maintenance and upgrading, the functions of each module are clearly divided, once a problem occurs in a certain module, the module can be quickly located and replaced, without the need for large-scale and complicated disassembly and wiring operations, and the maintenance efficiency is improved. Moreover, the above arrangement facilitates the maintenance of the control box one 13, the power module one 11, and the filter module one 12, avoids climbing maintenance, and improves the maintenance efficiency. Moreover, the cascade design of the power module one 11, the power module two, and the power module three 31 can flexibly adapt to different scales of power grid demand, and realize efficient utilization and management of energy. Therefore, the technical scheme of the present application effectively solves the problems of low space utilization efficiency and low maintenance efficiency of the layout of the energy storage system in the related art. Moreover, the arrangement of the filter module one 12 can increase the smoothness and stability of the direct current output.

[0040] In the embodiment, the output positive and negative interfaces of the power module one 11, the power module two and the power module three 31 are connected in cascade. The AC contactors are arranged in the power module one 11, the power module two and the power module three 31, and when the power module fails, the module bypass connection is performed, the faulty power module is cut off from the energy storage system, the redundant design of the whole system is realized, and the stable operation of the energy storage system is ensured. The communication optical fibers of the power module one 11, the power module two and the power module three 31 are connected to the cascade energy storage control cabinet after being collected by the optical fiber fusion box 95.

[0041] In the embodiment, the battery module one, the battery module two and the battery module three are all nickel-hydrogen batteries. Alternatively, in other embodiments, the battery module one, the battery module two and the battery module three are all lithium iron phosphate batteries.

[0042] As Figures 1 to 5As shown, the plurality of battery modules 16 form a first battery cluster 14 and a second battery cluster 15, the first battery cluster 14 and the second battery cluster 15 are arranged in a horizontal direction, the first battery cluster 14 and the second battery cluster 15 each include a plurality of battery modules 16 arranged in a vertical direction, and the first control cabinet 13 is two, the first control cabinet 13 is arranged below the first battery cluster 14 and is electrically connected with the plurality of battery modules 16 in the first battery cluster 14, the second control cabinet 13 is arranged below the second battery cluster 15 and is electrically connected with the plurality of battery modules 16 in the second battery cluster 15, and the filter module 12 and the power module 11 are arranged below the first control cabinet 13. By dividing the plurality of battery modules 16 into the first battery cluster 14 and the second battery cluster 15, and arranging the corresponding control cabinet 13 below the first battery cluster 14 and the second battery cluster 15, and arranging the filter module 12 and the power module 11 closely side by side, the space layout is further optimized, the wiring operation and the maintenance operation are facilitated, and the maintenance efficiency is improved. By arranging the first battery cluster 14 and the second battery cluster 15 in a horizontal direction, good ventilation between the first battery cluster 14 and the second battery cluster 15 is ensured, heat accumulation is avoided, and the safety and operation efficiency of the energy storage system are improved. Moreover, by arranging the plurality of battery modules 16 into two battery clusters 14 and 15 arranged in a horizontal direction, and arranging an independent control cabinet 13 for each battery cluster, the electrical connection and monitoring inside the battery cluster are more accurate and safe. The design of two control cabinets 13 corresponding to two battery clusters, on the one hand, reduces the load and physical height of a single control cabinet, improves the response speed, reliability and maintenance convenience of the control system; on the other hand, by arranging the filter module 12 and the power module 11 side by side, the signal transmission path is optimized, signal attenuation and interference are reduced, and the overall power quality of the energy storage system is further improved. In addition, the layout of the control cabinet below the battery cluster and the filter power module makes the system more convenient to maintain and upgrade, reduces the maintenance cost and downtime. Figures 1 to 5 As shown, the first energy storage unit 10 is a plurality of, and the plurality of battery clusters 14 and the plurality of battery clusters 15 of the plurality of first energy storage units 10 are arranged alternately. In this way, not only the overall space layout of the energy storage system is optimized, but also the energy conversion efficiency and the reliability of the energy storage system are improved. The alternately arranged battery clusters 14 and 15 enable the filter modules 12 and the power modules 11 of the plurality of first energy storage units 10 to also be arranged regularly, so as to facilitate the wiring operation of the plurality of filter modules 12 and the plurality of power modules 11 during installation, reduce the probability of wiring errors, and improve the installation and maintenance efficiency. Moreover, the alternately arranged battery clusters 14 and 15 enable the filter modules 12 and the power modules 11 of the plurality of first energy storage units 10 to also be alternately arranged with the space below the second battery cluster, thereby facilitating heat dissipation of the filter modules 12 and the power modules 11.

[0043] As shown in Figures 1 to 5 The plurality of battery modules three 36 form a battery cluster three 34 and a battery cluster four, the battery cluster three 34 and the battery cluster four are arranged in a spaced manner along the direction from the first energy storage unit 10 to the second energy storage unit 20, and the battery cluster three 34 and the battery cluster four each include a plurality of battery modules three 36 arranged in a vertical direction. The third energy storage unit 30 further includes a filter module two 32 and two control cabinets two 33, the first control cabinet two 33 is arranged below the battery cluster three 34 and is electrically connected with the plurality of battery modules three 36 in the battery cluster three 34, the second control cabinet two 33 is arranged below the battery cluster four and is electrically connected with the plurality of battery modules three 36 in the battery cluster four, the power module three 31 is electrically connected with the control cabinet two 33 via the filter module two 32, the filter module two 32 and the power module three 31 are arranged side by side and are both below the first control cabinet two 33, and the battery cluster three 34 is arranged adjacent to the battery cluster two 15. The above arrangement enables the first energy storage unit 10 to be connected with the second energy storage unit 20 through the third energy storage unit 30, and since the battery cluster three 34 and the battery cluster four are arranged in a spaced manner along the direction from the first energy storage unit 10 to the second energy storage unit 20, the wiring between the first energy storage unit 10 and the second energy storage unit 20 is simplified, the length of the wiring between the first energy storage unit 10 and the second energy storage unit 20 is reduced, maintenance is facilitated, and the maintenance efficiency is improved. By arranging the battery cluster three 34 and the battery cluster four and introducing the filter module two 32 and the control cabinet two 33, the stability and response speed of the third energy storage unit 30 are enhanced. The layout of the battery cluster three 34 adjacent to the battery cluster two 15 not only promotes the effective distribution of thermal energy, but also improves the overall energy efficiency of the system and reduces energy loss. The side-by-side arrangement of the filter module two 32 and the power module three 31 and the close electrical connection with the control cabinet two 33 ensure high-quality output of electrical energy, while simplifying the system maintenance process, improving on-site operability, and improving maintenance efficiency.

[0044] In the present embodiment, the plurality of battery modules two 22 form a battery cluster five and a battery cluster six, the battery cluster five and the battery cluster six are arranged in a spaced manner along the direction from the first battery cluster to the second battery cluster, and the battery cluster five and the battery cluster six each include a plurality of battery modules two 22 arranged in a vertical direction. The arrangement mode of the second energy storage unit 20 is referred to the arrangement mode of the first energy storage unit 10. The plurality of first battery clusters, the plurality of second battery clusters, the plurality of third battery clusters, the plurality of fourth battery clusters, the plurality of fifth battery clusters, and the plurality of sixth battery clusters are not connected to the power grid at the same time, which takes into account the system redundancy, and even in the case of partial energy storage unit or partial module failure, a relatively high energy conversion efficiency and system stability can be maintained. In the present embodiment, the filter module one 12 and the filter module two 32 are each provided with a fan 93 on the side wall for heat dissipation.

[0045] As shown in Figures 1 to 5As shown, the positive and negative electrode interfaces of the two control cabinets 13 are connected in parallel to the positive and negative electrode interfaces of the filter module 12, and the positive and negative electrode interfaces of each control cabinet 13 are connected to the positive and negative electrode interfaces of the filter module 12 through the first cable. By optimizing the electrical connection mode, the reliable operation of the system in extreme cases is ensured. The positive and negative electrode interfaces of the two control cabinets 13 are connected in parallel to the filter module 12, which not only simplifies the circuit but also improves the redundancy of the system. Even if one of the control cabinets 13 fails, the system can still work, avoiding the risk of system shutdown. Cable connection reduces electrical interference between the control cabinet 13 and the filter module 12, and the wiring is convenient and flexible. The positive and negative electrode interfaces of the power module 11 are connected in series to the positive and negative electrode interfaces of the filter module 12 through the first copper bar. The positive and negative electrode interfaces of the power module 31 are connected in series to the positive and negative electrode interfaces of the power module 2 through the second cable. The series connection of the power module 11 and the filter module 12 effectively controls the fluctuation of the current, improves the efficiency and stability of energy conversion, and helps the system to maintain stability under high load conditions. Copper bar connection reduces the resistance loss between the power module 11 and the filter module 12 when high current passes through, improving the efficiency of the system's power conversion. The use of the second cable between the power module 31 and the power module 2 allows the distance between the power module 31 and the power module 2 to be longer, making it easier to connect the power module 31 and the power module 2, making the connection more flexible and convenient, and improving maintenance efficiency.

[0046] In this embodiment, the first cable and the second cable are preferably silicone rubber cables. The silicone rubber cable can be fixed on the insulating beam of the support to ensure the insulation level. The positive electrode interface of the control cabinet 13 is connected to the positive electrode interface of the filter module 12 through the first cable, and the negative electrode interface of the control cabinet 13 is connected to the negative electrode interface of the filter module 12 through the first cable.

[0047] In other embodiments, the positive and negative electrode interfaces of the two control cabinets 13 are connected in parallel to the positive and negative electrode interfaces of the filter module 12, and the positive and negative electrode interfaces of each control cabinet 13 are connected to the positive and negative electrode interfaces of the filter module 12 through the first cable. The positive and negative electrode interfaces of the power module 11 are connected in series to the positive and negative electrode interfaces of the filter module 12 through the first copper bar. Alternatively, the positive and negative electrode interfaces of the power module 31 are connected in series to the positive and negative electrode interfaces of the power module 2 through the second cable.

[0048] As Figures 1 to 5As shown, the energy storage system also includes a second copper bar 40, a third copper bar 50, a battery cabin primary cable input end 61, and a cable terminal head 62. The battery cabin primary cable input end 61 is connected to the second copper bar 40 through the cable terminal head 62, and the second copper bar 40 is connected to the output negative terminal of the first power module one 11 of the first energy storage unit 10. The first end of the third copper bar 50 is connected to the output positive terminal of the first power module one 11 of the first energy storage unit 10, and the second end of the third copper bar 50 is connected to the output negative terminal of the first power module one 11 of the second energy storage unit 10. Through the introduction of the second copper bar 40, the third copper bar 50, the battery cabin primary cable input end 61, and the cable terminal head 62, a more efficient electrical cascade connection is achieved, and the compatibility of the system is enhanced. This design allows the system to smoothly transition between different energy storage units, and the use of the second copper bar 40 and the third copper bar 50 ensures uniform distribution of current during the cascade process, avoiding local overload and improving the overall stability and safety of the system. By introducing the second copper bar 40 and the third copper bar 50 and the cable terminal head 62, flexible cascade between multiple first energy storage units 10 and efficient connection to the power grid are achieved. The combination of the second copper bar 40 and the cable terminal head 62 ensures stable electrical connection between the battery cabin primary input end and the output end of the power module one 11, reducing voltage drop and energy loss. In this embodiment, the energy storage system also includes a battery cabin primary cable input end 61, and the third energy storage unit 30 outputs through a battery cabin primary cable output end 63.

[0049] As Figures 1 to 5As shown, the second copper bar 40 includes a first bar segment 41, a second bar segment 42, and a third bar segment 43 connected to each other, the first bar segment 41 is connected to the cable terminal head 62, the third bar segment 43 is connected to the output negative pole interface of the power module one 11 of the first first energy storage unit 10, and the second bar segment 42 is connected between the first bar segment 41 and the third bar segment 43, and the first bar segment 41 and the third bar segment 43 are arranged in parallel. The segmented design of the second copper bar 40 optimizes the electrical connection and maintenance process of the energy storage system. The direct connection of the first bar segment 41 and the cable terminal head 62 simplifies the interface of the first energy storage unit 10 and the external power grid, and enhances the electrical compatibility of the energy storage system. The arrangement of the first bar segment 41, the second bar segment 42, and the third bar segment 43 allows the two ends of the second copper bar 40 to be at different heights, making the connection operation more simple and convenient, and facilitating maintenance. The third copper bar 50 includes a fourth bar segment 51 and a fifth bar segment 52 connected to each other, the fourth bar segment 51 is connected to the output positive pole interface of the power module one 11 of the first first energy storage unit 10, the fifth bar segment 52 is connected to the output negative pole interface of the power module one 11 of the second first energy storage unit 10, and the fourth bar segment 51 and the fifth bar segment 52 are arranged in parallel and connected by a conductive plate 53. The connection of the fourth bar segment 51 and the fifth bar segment 52 through the conductive plate 53 not only ensures the electrical continuity of the copper bar, but also improves the reliability of the connection, reduces the steps during disassembly and reassembly, reduces the maintenance cost and time, and improves the maintenance efficiency. The parallel arrangement of the fourth bar segment 51 and the fifth bar segment 52 further improves the stability and safety of the system, especially the adaptability in complex power grid environment. The special design of the third copper bar 50, i.e. through the connection of the fourth bar segment 51 and the fifth bar segment 52, realizes the electrical cascade between adjacent first energy storage units 10, while maintaining electrical isolation, preventing short circuit risk, and improving the overall safety and operation efficiency of the system. The use of the conductive plate 53 to connect the fourth bar segment 51 and the fifth bar segment 52 reduces the processing difficulty of the third copper bar 50, and can adjust the distance between the two ends of the third copper bar 50 as needed, making the use more flexible and the maintenance more convenient.

[0050] In the present embodiment, the energy storage system is connected to the first energy storage unit 10 through the 35kV three-core cable cold shrink indoor cable terminal head 62 connected to the first bar segment 41, and then connected to the output negative pole interface of the power module one 11 of the first first energy storage unit 10 through the second bar segment 42 and the third bar segment 43. The battery compartment also has a battery compartment drain hole 94.

[0051] In other embodiments, the second copper busbar 40 includes a first section 41, a second section 42, and a third section 43 connected to each other. The first section 41 is connected to the cable termination head 62, the third section 43 is connected to the negative output interface of the power module 11 of the first energy storage unit 10, and the second section 42 is connected between the first section 41 and the third section 43. The first section 41 and the third section 43 are arranged in parallel. Alternatively, the third copper busbar 50 includes a fourth section 51 and a fifth section 52 connected to each other. The fourth section 51 is connected to the positive output interface of the power module 11 of the first energy storage unit 10, and the fifth section 52 is connected to the negative output interface of the power module 11 of the second energy storage unit 10. The fourth section 51 and the fifth section 52 are arranged in parallel and connected by a conductive plate 53.

[0052] like Figures 1 to 5 As shown, the energy storage system also includes a first support 71, a second support 72, and a third support 73. The first support 71 has multiple first placement shelves 713 for placing multiple battery modules 16, the second support 72 has multiple second placement shelves for placing multiple battery modules 22, and the third support 73 has multiple third placement shelves 731 for placing multiple battery modules 36. Within the same horizontal plane, the first placement shelves 713, second placement shelves, and third placement shelves 731 are arranged flush. By designing the first support 71, second support 72, and third support 73, the layout of the multiple battery modules 16, multiple battery modules 22, and multiple battery modules 36 is optimized, improving the wiring layout of the system and enhancing maintenance convenience. The flush placement shelves ensure uniform wiring between battery modules, facilitating connections, reducing the possibility of wiring errors, and also ensuring uniform heat distribution, extending service life. In this embodiment, a grid layout design is adopted. Through the regular arrangement of the internal space, the connection lines between modules are reduced, enhancing the overall compactness of the energy storage system.

[0053] like Figures 1 to 5As shown, the first support 71 comprises a first support body 711 and a second support body 712, the first support body 711 comprises a plurality of first placement layer plates 713 for placing the battery cluster one 14, the first support body 711 is provided with a first placement position for placing the control box one 13, a second placement position for placing the power module one 11, and a third placement position for placing the filter module one 12, the second placement position and the third placement position are arranged in the same horizontal plane and are both below the first placement position. The second support body 712 comprises a plurality of first placement layer plates 713 for placing the battery cluster two 15, and is provided with a second placement position for placing the control box one 13, and the second placement position and the fourth placement position are arranged in the same horizontal plane. In the same horizontal plane, the first placement layer plates 713 in the first support body 711 and the first placement layer plates 713 in the second support body 712 are arranged in the same horizontal plane. The double support body design of the first support body 711 and the second support body 712 realizes the effective integration and layout optimization of the battery cluster one 14, the battery cluster two 15, the control box one 13, the power module one 11 and the filter module one 12. The plurality of battery modules one 16 in the first battery cluster and the plurality of battery modules two 22 in the second battery cluster can be arranged in the same horizontal plane, so that the layout of the first support body 711 and the second support body 712 improves the space utilization efficiency, ensures the electrical connection consistency between the battery modules, improves the stability and reliability of the electrical system, and improves the maintenance efficiency. The independent placement of the control box one 13, the power module one 11 and the filter module one 12 improves the maintenance convenience and operation safety of the system, especially the vertical layout of the battery cluster one 14 and the control box one 13 in the second support body 712, which reduces electrical interference and improves the accuracy of signal transmission. The above arrangement facilitates the placement of the control box one 13 below the battery cluster one 14, and the placement of the power module one 11 and the filter module one 12 below the control box one 13, so as to facilitate the maintenance of the control box one 13, the power module one 11 and the filter module one 12, avoid climbing operation, and improve the maintenance efficiency.

[0054] As ​As shown, the energy storage system further comprises a first liquid cooling radiator 81 and a second liquid cooling radiator 82, the plurality of battery modules one 16 are connected in series through a first liquid cooling pipeline, the plurality of battery modules two 22 are connected in series through a second liquid cooling pipeline, and the plurality of battery modules three 36 are connected in series through a third liquid cooling pipeline. The first liquid cooling pipeline, the second liquid cooling pipeline, and the third liquid cooling pipeline are connected in parallel on the first liquid cooling radiator 81. The power module one 11 is connected in communication with the second liquid cooling radiator 82 through a fourth liquid cooling pipeline 821, the power module two is connected in communication with the second liquid cooling radiator 82 through a fifth liquid cooling pipeline, the power module three 31 is connected in communication with the second liquid cooling radiator 82 through a sixth liquid cooling pipeline 822, and the fourth liquid cooling pipeline 821, the fifth liquid cooling pipeline, and the sixth liquid cooling pipeline 822 are connected in parallel on the second liquid cooling radiator 82. By using the first liquid cooling radiator 81 and the second liquid cooling radiator 82, efficient heat management is realized for the battery module one 16 and the power module one 11 respectively, which facilitates independent heat management for the battery module one 16 and the power module one 11 respectively, and improves the cooling efficiency. The reduction of the cooling effect caused by the excessive length of the liquid cooling path is reduced, and on the other hand, the workload of liquid discharge and recovery of the liquid cooling pipeline for power module or battery cluster maintenance and replacement is reduced, and the safe and stable efficient operation of the energy storage device is improved. The plurality of battery modules one 16 are connected in series through the first liquid cooling pipeline, the plurality of battery modules two 22 are connected in series through the second liquid cooling pipeline, and the plurality of battery modules three 36 are connected in series through the third liquid cooling pipeline, forming an independent cooling cycle, ensuring the cooling effect of each battery module, prolonging the battery life, improving the battery performance, and reducing the cooling energy consumption by series connection. The first liquid cooling pipeline, the second liquid cooling pipeline, and the third liquid cooling pipeline are connected in parallel on the first liquid cooling radiator 81, so that even if part of the pipeline fails, the system can still maintain basic heat management functions, ensuring the long-term stable operation of the energy storage system. In this way, the cooling energy consumption and redundancy design can be considered, and the reliability improvement and energy consumption reduction are realized. The power module one 11 is connected in series through an independent liquid cooling cycle, reducing the electrical performance decline caused by overheating, and improving the working efficiency and reliability of the power module one 11. The design of the liquid cooling system also considers the redundancy of the system, and through the parallel liquid cooling pipeline design, even if part of the pipeline fails, the system can still maintain basic heat management functions, ensuring the long-term stable operation of the energy storage system.

[0055] In the embodiment, the first liquid cooling radiator 81 and the second liquid cooling radiator 82 are placed side by side in the independent space at the end of the energy storage cabin body, so as to facilitate the monitoring of data and the issuance of local control instructions. The BMS control cabinet 91 is also arranged in the energy storage cabin body, which is responsible for monitoring the state of each battery cluster. The fire-fighting equipment 92 is also arranged in the energy storage cabin body, which is responsible for detecting the combustible materials and fire sources in the entire cabin body. The optical fiber fusion box 95 connects the multiple communication optical fibers received and sent by the power module one 11, the power module two and the power module three 31 to form a communication line, which is connected to the cascaded energy storage control cabinet, to complete the state monitoring of the power module and the issuance of the unlocking command. The power module one 11 is provided with an input interface and an output interface in communication with the second liquid cooling radiator 82, and the cooling liquid flows into the input interface and flows out of the output interface.

[0056] It should be noted that the electrical connection includes power electrical connection and signal electrical connection. The electrical connection includes direct electrical connection and indirect electrical connection. Indirect electrical connection, such as: the battery module is connected with the power module through the control box and the filter module. In the embodiment, the electrical connection is the connection of the power side.

[0057] In the embodiment, the energy storage system is a high-voltage cascaded storage system, which belongs to the field of hybrid energy storage technology. High-voltage cascaded storage technology is an advanced topology structure applied in energy storage systems, which has significant technical advantages and application prospects. High-voltage cascaded technology directly connects multiple energy storage units to the medium-high voltage alternating current system through module cascading, without the need for transformer step-up, thereby realizing efficient and compact construction of the energy storage system. High-voltage cascaded technology eliminates the need for a power frequency transformer and a distributed energy storage power station energy storage converter (DC / AC converter), improving the operating efficiency of the system, and the overall work efficiency can reach more than 98%, while reducing operating costs. High-voltage cascaded technology can reduce the occupied area and improve the energy density per unit construction area, making the energy storage system more compact. The high-voltage cascaded system has a short response time, which can meet the emergency dispatching of the power grid and improve the flexibility and stability of the power grid. High-voltage cascaded energy storage uses a reduced number of battery cells, and the temperature control in the battery stack is more uniform, which is beneficial to prolonging the service life of the battery.

[0058] In the description of the application, it should be understood that "a plurality of" means two or more. The positional words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the positional relationship or position relationship shown in the drawings, which are only for the convenience of describing the application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the scope of protection of the application; the positional words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0059] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0060] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0061] The above is only the preferred embodiment of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. An energy storage system, characterized in that, include: The first energy storage unit (10) includes a power module (11), a filter module (12), a control box (13), and multiple battery modules (16). The control box (13) is electrically connected to the multiple battery modules (16), and the power module (11) is electrically connected to the control box (13) via the filter module (12). The control box (13) is located below the multiple battery modules (16), and the filter module (12) and the power module (11) are arranged side by side and are both located below the control box (13). The second energy storage unit (20) is disposed opposite to the first energy storage unit (10). The second energy storage unit (20) includes a power module two and a plurality of battery modules two (22) electrically connected to the power module two. The third energy storage unit (30) is disposed on one side of the first energy storage unit (10) and the second energy storage unit (20). The third energy storage unit (30) includes a power module three (31) and a plurality of battery modules three (36) electrically connected to the power module three (31). Among them, the power module one (11), the power module two and the power module three (31) are cascaded and connected to the power grid.

2. The energy storage system according to claim 1, characterized in that, Multiple battery modules (16) form a battery cluster (14) and a battery cluster (15). The battery cluster (14) and the battery cluster (15) are spaced apart in the horizontal direction. Both the battery cluster (14) and the battery cluster (15) include multiple battery modules (16) spaced apart in the vertical direction. There are two control boxes (13). The first control box (13) is located below the battery cluster (14) and is electrically connected to the multiple battery modules (16) in the battery cluster (14). The second control box (13) is located below the battery cluster (15) and is electrically connected to the multiple battery modules (16) in the battery cluster (15). The filter module (12) and the power module (11) are both located below the first control box (13).

3. The energy storage system according to claim 2, characterized in that, There are multiple first energy storage units (10), and multiple battery clusters (14) and multiple battery clusters (15) of the multiple first energy storage units (10) are alternately arranged.

4. The energy storage system according to claim 2, characterized in that, Multiple battery modules three (36) form battery cluster three (34) and battery cluster four. The battery cluster three (34) and battery cluster four are spaced apart along the direction from the first energy storage unit (10) to the second energy storage unit (20). Both the battery cluster three (34) and the battery cluster four include multiple battery modules three (36) spaced apart vertically. The third energy storage unit (30) further includes a filter module 2 (32) and two control boxes 2 (33). The first control box 2 (33) is located below the battery cluster 3 (34) and is electrically connected to multiple battery modules 3 (36) in the battery cluster 3 (34). The second control box 2 (33) is located below the battery cluster 4 and is electrically connected to multiple battery modules 3 (36) in the battery cluster 4. The power module 3 (31) is electrically connected to the control box 2 (33) via the filter module 2 (32). The filter module 2 (32) and the power module 3 (31) are arranged side by side and are both located below the first control box 2 (33). The battery cluster 3 (34) is arranged adjacent to the battery cluster 2 (15).

5. The energy storage system according to claim 4, characterized in that, The positive and negative battery interfaces of the two control boxes (13) are connected in parallel to the positive and negative battery interfaces of the filter module (12). The positive and negative battery interfaces of each control box (13) are connected to the positive and negative battery interfaces of the filter module (12) through a first cable. The positive and negative interfaces of the power module (11) are connected in series with the positive and negative interfaces of the filter module (12) through a first copper busbar. And / or, the positive and negative interfaces of the power module (31) are connected in series with the positive and negative interfaces of the power module (2) through a second cable.

6. The energy storage system according to claim 3, characterized in that, The energy storage system also includes a second copper busbar (40), a third copper busbar (50), a primary cable input terminal (61) for the battery compartment, and a cable termination head (62); The primary cable input terminal (61) of the battery compartment is connected to the second copper busbar (40) through the cable terminal head (62), and the second copper busbar (40) is connected to the output negative terminal interface of the power module (11) of the first first energy storage unit (10); The first end of the third copper busbar (50) is connected to the positive output interface of the power module (11) of the first first energy storage unit (10), and the second end of the third copper busbar (50) is connected to the negative output interface of the power module (11) of the second first energy storage unit (10).

7. The energy storage system according to claim 6, characterized in that, The second copper busbar (40) includes a first section (41), a second section (42), and interconnected segments. The third row (43) is connected to the cable terminal (62) of the first row (41), and the third row (43) is connected to the negative output interface of the power module (11) of the first first energy storage unit (10). The second row (42) is connected between the first row (41) and the third row (43), and the first row (41) and the third row (43) are arranged in parallel. The third copper busbar (50) includes a fourth section (51) and a fifth section (52) that are interconnected. The fourth row (51) is connected to the positive output interface of the power module (11) of the first first energy storage unit (10), and the fifth row (52) is connected to the negative output interface of the power module (11) of the second first energy storage unit (10). The fourth row (51) and the fifth row (52) are arranged in parallel and connected by a conductive plate (53).

8. The energy storage system according to claim 2, characterized in that, The energy storage system further includes a first support (71), a second support (72) and a third support (73). The first support (71) has a plurality of first placement shelves (713) for placing a plurality of battery modules (16), the second support (72) has a plurality of second placement shelves for placing a plurality of battery modules (22), and the third support (73) has a plurality of third placement shelves (731) for placing a plurality of battery modules (36). Within the same horizontal plane, the first placement shelf (713), the second placement shelf, and the third placement shelf (731) are arranged flush.

9. The energy storage system according to claim 8, characterized in that, The first support (71) includes a first frame (711) and a second frame (712). The first frame (711) includes a plurality of first placement shelves (713) for placing the battery cluster (14). The first frame (711) is provided with a first placement position for placing the control box (13), a second placement position for placing the power module (11) and a third placement position for placing the filter module (12). The second placement position and the third placement position are flush with each other and are both located below the first placement position. The second frame (712) includes a plurality of first placement shelves (713) for placing the second battery cluster (15), and the second frame (712) is provided with a fourth placement position for placing the first control box (13), and the second placement position is flush with the fourth placement position; in the same horizontal plane, the first placement shelves (713) in the first frame (711) are flush with the first placement shelves (713) in the second frame (712).

10. The energy storage system according to claim 1, characterized in that, The energy storage system also includes a first liquid-cooled radiator (81) and a second liquid-cooled radiator (82). Multiple battery modules (16) are connected in series via a first liquid cooling pipe, multiple battery modules (22) are connected in series via a second liquid cooling pipe, and multiple battery modules (36) are connected in series via a third liquid cooling pipe. The first liquid cooling pipe, the second liquid cooling pipe, and the third liquid cooling pipe are connected in parallel on the first liquid cooling radiator (81). The first power module (11) is connected to the second liquid-cooled radiator (82) through the fourth liquid-cooling pipe (821), the second power module is connected to the second liquid-cooled radiator (82) through the fifth liquid-cooling pipe, and the third power module (31) is connected to the second liquid-cooled radiator (82) through the sixth liquid-cooling pipe (822). The fourth liquid-cooling pipe (821), the fifth liquid-cooling pipe, and the sixth liquid-cooling pipe (822) are connected in parallel to the second liquid-cooled radiator (82).

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