Complementary electrical cabinets and energy storage power plants

Abstract

A complementary electrical cabinet and an energy storage power plant are disclosed. The complementary electrical cabinet includes a cabinet, a power storage module, and a complementary module. The cabinet is provided with an installation space, and both the power storage module and the complementary module are provided in the installation space. The complementary module is provided with a DCDC converter, and the DCDC converter is electrically connected to the power storage module and also electrically connected to the energy storage converter of the energy storage power plant. When the complementary electrical cabinet is applied to the energy storage power plant, the power storage module of the complementary electrical cabinet is connected to the energy storage converter through the complementary module, without affecting the output capacity of the existing power storage module and the energy storage power plant. Also, by integrating the complementary module and the power storage module in one cabinet, the whole can be transported and installed, saving floor area, facilitating wiring and system connection, and in the later stage, inspection or maintenance can be carried out simultaneously, which is convenient and fast. When the complementary electrical cabinet is not system-connected to the energy storage power plant, it may be used as a small energy storage device, and one cabinet can support multiple applications.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application filed with the China National Intellectual Property Administration on October 27, 2022, with the application number 202222852949.7 and the invention title "Complementary Electric Cabinet and Energy Storage Power Plant", and all its contents are incorporated herein by reference.

[0002] This application relates to the technical field of energy storage facilities, particularly to complementary electric cabinets and energy storage power plants.

Background Art

[0003] With the steady development of the industrial and commercial energy storage market, the number of installed ground energy storage devices has been continuously increasing. Due to its own attenuation characteristics, the energy of the energy storage battery gradually decreases with the usage time. In order to ensure the rated dischargeable energy of the battery at the grid connection point and reduce the initial investment cost of the energy storage power plant, operators generally choose a method of using energy storage products with small granularity several times to supplement during the entire life cycle of the energy storage power plant.

[0004] Generally, conventional industrial and commercial energy storage cabinets do not have the function of directly connecting and coupling with energy storage power generation, and cannot easily replenish large-scale energy storage power plants. The heat dissipation efficiency of conventional industrial and commercial air-cooled energy storage systems is low, the energy consumption is high, the temperature control range is limited, and the impact on the battery cell life is large.

Summary of the Invention

Problems to be Solved by the Invention

[0005] This application provides a complementary electric cabinet, mainly aiming to assemble a complementary module and Energy storage module into one cabinet, realizing the high integration of the complementary electric cabinet, and facilitating transportation, grid connection, operation and maintenance. [Means for solving the problem]

[0006] To achieve the above objective, this application provides a complementary electrical cabinet applicable to an energy storage power plant, the complementary electrical cabinet comprising: a cabinet provided with a mounting space; an energy storage module provided within the mounting space; and a complementary module provided within the mounting space, the complementary module being equipped with a DC-DC converter, the DC-DC converter being electrically connected to the energy storage module and the complementary module being used to be electrically connected to an energy storage converter of the energy storage power plant.

[0007] In one embodiment, the complementary electrical cabinet further includes a liquid cooling module provided within the mounting space and connected to the energy storage module.

[0008] In one embodiment, the mounting space is The aforementioned supplementary module is provided in the supplementary room, An energy storage chamber provided on one side of the aforementioned supplementary chamber, wherein the energy storage module is provided within the energy storage chamber, A liquid cooling chamber provided on one side of the supplementary chamber and the energy storage chamber, wherein the liquid cooling module includes a liquid cooling chamber provided within the liquid cooling chamber, The aforementioned energy storage chamber is enclosed and arranged in a sealed manner.

[0009] In one embodiment, at least two sides of the cabinet are provided with first communication holes that communicate with the complement chamber, and the space between at least two of the first communication holes forms a first duct located within the complement chamber, and a first fan is provided within the complement chamber, and the first fan and the complement module are sequentially located within the first duct. At least two sides of the cabinet are further provided with second communication holes that communicate with the liquid cooling chamber, and the space between at least two of the second communication holes forms a second duct located within the liquid cooling chamber, a second fan is provided within the liquid cooling chamber, and the second fan and the liquid cooling module are sequentially located within the second duct.

[0010] In one embodiment, the bottom wall of the supplement chamber is arranged at an incline, and the cabinet is provided with a first drain hole communicating with the supplement chamber, so that water entering the supplement chamber is discharged from the first drain hole. and / or, the bottom wall of the liquid cooling chamber is arranged at an angle, and the cabinet is provided with a second drain hole communicating with the liquid cooling chamber, so that water entering the liquid cooling chamber is discharged from the second drain hole.

[0011] In one embodiment, the energy storage module includes at least two battery clusters arranged side by side in the energy storage chamber, the complementary module includes at least two DC-DC converters, one of which is electrically connected to one of the battery clusters. Each battery cluster includes a plurality of battery packs, the liquid cooling module includes a main conduit and at least two branch conduits, the plurality of battery packs in one battery cluster are connected in series to correspond to one branch conduit, and at least two branch conduits are arranged in parallel and communicate with the main conduit.

[0012] In one embodiment, the supplementary electrical cabinet further includes a fire extinguishing module, the fire extinguishing module is A detection unit is provided in the energy storage chamber and includes at least one of a temperature detector, a smoke detector, and a combustible gas detector, A fire extinguishing unit comprising a ventilation component and a fire protection component, wherein both the ventilation component and the fire protection component are provided within the energy storage chamber, the ventilation component connects the outside with the energy storage chamber to form air convection, and the fire protection component is a fire extinguishing unit used for fire extinguishing.

[0013] In one embodiment, the complementary electrical cabinet further includes a control module, and a control chamber is further provided within the mounting space, the control chamber is located below the liquid cooling chamber and on one side of the energy storage chamber, the control module is located within the control chamber, and the liquid cooling module, the Energy storage module and electrically connected to the aforementioned complementary module, The control room and the energy storage room are in communication with each other and are arranged in a sealed manner.

[0014] In one embodiment, the cabinet is A cabinet body having a supplementary chamber, an energy storage chamber, a liquid cooling chamber, and a control chamber, each having an opening on one side, wherein a sealing ring is provided at the openings of the supplementary chamber, the energy storage chamber, the liquid cooling chamber, and the control chamber, The system includes at least two door panels, at least one of which closes the openings of the complement chamber and the energy storage chamber, at least one of which closes the openings of the liquid cooling chamber and the control chamber, and the door panels being in contact with the seal ring.

[0015] In one embodiment, the complementary electrical cabinet further includes a top cap that is removable from the top of the cabinet and a base that is removable from the bottom of the cabinet. And / or, a drain pan is provided at the bottom of the mounting space, a water receiving tank is provided in the drain pan, and a communication opening is provided in the bottom wall of the water receiving tank to connect the water receiving tank to the outside.

[0016] This application further provides an energy storage power plant, which includes an energy storage converter, and a complementary electric cabinet described in any one of the above embodiments, wherein the DCDC converter is electrically connected to the energy storage converter.

Advantages of the Invention

[0017] In the technical solution of this application, when the complementary electric cabinet is applied to an energy storage power plant, the energy storage module of the complementary electric cabinet is connected to the energy storage converter through the complementary module, without affecting the existing energy storage module and the output capacity of the energy storage power plant. Also, in this application, the complementary module and the energy storage module are integrated in one cabinet, so that they can be transported and installed as a whole, saving floor space, facilitating wiring and system connection, and also enabling inspection or maintenance to be carried out simultaneously in the later stage, which is convenient and fast. When the complementary electric cabinet is not system-connected to the energy storage power plant, it may be used as a small energy storage device, and one cabinet can be used for multiple purposes.

[0018] To clearly explain the technical solutions of the embodiments or the prior art of this application, the following briefly introduces the necessary drawings of the embodiments or the prior art. The drawings described below are only some embodiments of this application. On the premise that those skilled in the art do not need to perform inventive labor, based on the structures shown in these drawings, other drawings may be obtained.

Brief Description of the Drawings

[0019] [Figure 1] Front structural schematic diagram of one embodiment of the complementary electric cabinet of this application [Figure 2] Rear structural schematic diagram of the complementary electric cabinet in FIG. 1 [Figure 3] Enlarged schematic diagram of part A in FIG. 2 [Figure 4]Schematic diagram of the structure of the complementary electric cabinet in FIG. 1 from other viewing angles [Figure 5] Schematic diagram of the internal structure of one side of an embodiment of the complementary electric cabinet of the present application [Figure 6] Schematic diagram of the internal structure of one embodiment of the complementary electric cabinet of the present application [Figure 7] Schematic diagram of the internal structure of another embodiment of the complementary electric cabinet of the present application

Embodiments for Carrying Out the Invention

[0020] Regarding the realization of the purpose, functional characteristics and advantages of the present application, it will be further described by combining embodiments and referring to the drawings.

[0021] Hereinafter, by combining the drawings of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described. The described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments of the present application, assuming that those skilled in the art do not perform labor worthy of inventive step, all other embodiments obtained belong to the protection scope of the present application. [[ID=--]]

[0022] Here, all direction indications (such as up, down, left, right, front, back...) of the embodiments of the present application are only to interpret the relative positional relationship, movement status, etc. between each member in a specific posture (refer to the illustration). When the specific posture changes, the direction indication also changes correspondingly.

[0023] In addition, the descriptions such as "first" and "second" in the present application do not indicate or imply their relative importance, nor implicitly indicate the number of the indicated technical features, but are only for the purpose of description. Thus, the features limited by "first" and "second" include at least one of the said features explicitly or implicitly. Also, the technical solutions between each embodiment may be combined with each other, but it must be based on what those skilled in the art can achieve. When the combination of technical solutions is contradictory to each other or cannot be realized, such a combination of technical solutions does not exist and does not fall within the protection scope claimed by the present application.

[0024] To achieve a high degree of integration of complementary electrical cabinets and to facilitate transportation, grid connection, and operation and maintenance, this application submits a complementary electrical cabinet 100.

[0025] Referring to Figures 1 to 7, in some embodiments of this application, the supplementary electrical cabinet 100 is applied to an energy storage power plant. The supplementary electrical cabinet 100 includes a cabinet 10, a storage module 30, and a supplementary module 20, the cabinet 10 being provided with a mounting space, the storage module 30 and the supplementary module 20 both being provided within the mounting space, the supplementary module 20 being provided with a DC-DC converter, the DC-DC converter being electrically connected to the storage module 30 and also to the energy storage converter of the energy storage power plant.

[0026] Referring to Figures 1 and 6, in one embodiment, the cabinet 10 is substantially rectangular in shape, and mounting space for various electrical equipment is provided inside. The energy storage module 30 includes a plurality of battery packs 311 connected in series or in parallel, and has one input / output side, with one end of a DC-DC converter connected to the input / output side of the energy storage module 30 and the other end connected to an energy storage converter of an energy storage power plant.

[0027] The DC end of the energy storage converter is connected to a DC-DC converter, and the AC end is connected to the power grid or load. Generally, before being connected to a supplemental electrical cabinet, the energy storage power plant has some energy storage modules 30, and the input and output terminals of the existing energy storage modules 30 are connected to the DC end of the energy storage converter, and the DC-DC converter in this embodiment is connected to the energy storage converter by being connected to the input and output terminals of the existing energy storage modules 30.

[0028] The main circuit of the DC-DC converter may be a 3-level BUCK-BOOST circuit or a 2-level BUCK-BOOST circuit, and is not limited thereto. This embodiment does not limit the connection configuration of the battery pack 311 of the energy storage module 30.

[0029] In this embodiment, when the complementary electrical cabinet 100 is applied to an energy storage power plant, the energy storage module 30 of the complementary electrical cabinet 100 is connected to the energy storage converter via the complementary module 20, and does not affect the output capacity of the existing energy storage module 30 and the energy storage power plant. Furthermore, in this embodiment, the complementary module 20 and the energy storage module 30 are integrated into a single cabinet 10, allowing for overall transportation and installation, saving site space, facilitating wiring and grid connection, and enabling simultaneous inspection or maintenance later on, making it convenient and rapid. When the complementary electrical cabinet 100 is not grid-connected to an energy storage power plant, it may also be used as a small energy storage device, allowing one cabinet to serve multiple purposes.

[0030] Referring to Figure 6, in one embodiment, the complementary electrical cabinet 100 further includes a liquid cooling module 40 which is provided within the mounting space and connected to the energy storage module 30. In this embodiment, the liquid cooling module 40 dissipates heat from the energy storage module 30, resulting in a smaller occupied space and higher heat dissipation efficiency.

[0031] Specifically, in one embodiment, the energy storage module 30 includes at least two battery clusters arranged side by side in an energy storage chamber 113, the complementary module 20 includes at least two DC-DC converters, one DC-DC converter being electrically connected to one battery cluster, each battery cluster including multiple battery packs 311, the liquid-cooled module 40 includes a main conduit 41 and at least two branch conduits 43, the multiple battery packs 311 of one battery cluster are connected in series to one branch conduit 43, and at least two branch conduits 43 are arranged in parallel and communicate with the main conduit 41.

[0032] In this embodiment, the main pipeline 41 includes an inlet pipe and an outlet pipe that enter the energy storage chamber 113 from the liquid cooling chamber 115. The branch pipelines 43 connect multiple liquid cooling passages within the battery cluster in series, with one end connected to the inlet pipe and the other end connected to the outlet pipe, and one branch pipeline 43 is provided corresponding to one battery cluster.

[0033] Preferably, the battery pack 311 is provided with a liquid cooling passage for heat exchange with a heat-generating module such as a battery, and the branch conduit 43 includes a multi-stage conduit for connecting each liquid cooling passage in series to form a complete passage.

[0034] Of course, the liquid cooling module 40 includes a water pump and a refrigeration unit, and the water pump, main line 41, branch line 43, refrigeration unit and drain pipe constitute a cooling circulation passage, the water pump provides power to the coolant in the passage, and the refrigeration unit exchanges heat with the coolant to lower its temperature.

[0035] Furthermore, a drain pan is provided at the bottom of the mounting space, and a water tank is provided in the drain pan, where any leaked coolant is collected. The shape of the water tank is not specified, but it covers almost the entire bottom of the mounting space. A communication opening is provided in the bottom wall of the water tank to connect the water tank to the outside. The communication opening is kept closed at all times to satisfy the sealing requirement, and when the communication opening is opened, the liquid in the water tank is discharged.

[0036] Preferably, the opening and closing of the communication port is controlled by an internal insertion switch.

[0037] Referring to Figures 6 and 7, in one embodiment, the mounting space includes a supplementary chamber 111, an energy storage chamber 113, and a liquid cooling chamber 115, the supplementary module 20 is located in the supplementary chamber 111, the energy storage chamber 113 is located on one side of the supplementary chamber 111, the energy storage module 30 is located in the energy storage chamber 113, the liquid cooling chamber 115 is located on one side of the supplementary chamber 111 and the energy storage chamber 113, the liquid cooling module 40 is located in the liquid cooling chamber 115, and the energy storage chamber 113 is arranged in a sealed manner.

[0038] In this embodiment, the energy storage chamber 113 is arranged in a sealed state so that external particulate foreign matter and other particles do not enter the energy storage chamber 113. Energy storage module This prevents interference with the normal operation of such equipment, thereby ensuring the safety of the equipment. Furthermore, the sealed energy storage chamber 113 avoids the formation of convection with the outside, thereby better maintaining temperature and heat dissipation.

[0039] Here, the sealed environment of the energy storage chamber 113 is ensured by sealing the inlet pipe, the outlet pipe, and the connection terminals between the energy storage module 30 and the complementary module 20.

[0040] In one embodiment, at least two sides of the cabinet 10 are provided with first communication holes 111a that communicate with a supplementary chamber 111, and the space between at least two of the first communication holes 111a forms a first duct located within the supplementary chamber 111, a first fan is provided within the supplementary chamber 111, and the first fan and the supplementary module 20 are sequentially located within the first duct.

[0041] At least two sides of the cabinet 10 are further provided with second communication holes 115a that communicate with the liquid cooling chamber 115, and the space between at least two second communication holes 115a forms a second duct located inside the liquid cooling chamber 115, a second fan is provided inside the liquid cooling chamber 115, and the second fan and the liquid cooling module 40 are sequentially located inside the second duct.

[0042] In this embodiment, the front, top, and backplane of the cabinet 10 are all provided with first communication holes 111a, forming a first duct that draws in air from the front and exhausts air from the back and top. A first fan is provided in the first communication holes 111a of the top and / or backplane to create air convection inside and outside the supplementary chamber 111.

[0043] Similarly, second communication holes 115a are provided on the front, right side, and backplane of the cabinet 10, forming a second duct that draws in air from the front and exhausts it from the right side and back side. A second fan is provided in the second communication holes 115a on the right side and / or backplane to create air convection inside and outside the liquid cooling chamber 115.

[0044] Preferably, the multiple first communication holes 111a and multiple second communication holes 115a are provided geographically in the cabinet, and by setting the diameter of each first communication hole 111a and second communication hole 115a to be small, it is possible to prevent large foreign objects from entering the storage chamber 111 and the liquid cooling chamber 115 and affecting the normal operation of the equipment.

[0045] The first communication hole 111a and the second communication hole 115a may be square holes, circular holes, or the like, and are not limited thereto.

[0046] Of course, in other embodiments of this application, the first duct may be further configured to draw in air from the front and top and exhaust air from the rear, and the second duct may be further configured to draw in air from the front and right and exhaust air from the rear.

[0047] Referring to Figures 2 and 3, in one embodiment, the bottom wall of the supplement chamber 111 is inclined, and the cabinet 10 is provided with a first drain hole 111b that communicates with the supplement chamber 111, so that water that enters the supplement chamber 111 is discharged from the first drain hole 111b.

[0048] In an inclined configuration, the bottom wall is positioned so as to form an angle between the plane in which it is located and the horizontal plane, and the first drain hole 111b is located on the lower side.

[0049] In this embodiment, the height of the bottom wall gradually decreases from the front to the rear of the cabinet 10, and the first drain hole 111b is provided in the backplane. A first communication hole 111a is provided at the top of the cabinet 10, allowing rainwater to easily enter the storage chamber 111 through the first communication hole 111a. If the bottom wall is arranged at an incline, the water will move along the bottom wall to the first drain hole 111b and be discharged, preventing water from accumulating and ensuring the safety of the equipment.

[0050] Furthermore, the bottom wall of the liquid cooling chamber 115 is inclined, and the cabinet 10 is provided with a second drain hole 115b that communicates with the liquid cooling chamber 115. Condensed water and / or coolant in the liquid cooling chamber 115 move along the bottom wall and are discharged through the second drain hole 115b.

[0051] Preferably, guide grooves extending in the front-to-back direction are provided in the bottom walls of the supplementation chamber 111 and the bottom walls of the liquid cooling chamber 115 to guide water droplets or water flow.

[0052] Preferably, the first drain hole 111b and the second drain hole 115b are strip-shaped through holes.

[0053] Preferably, the cabinet 10 is provided with a plurality of first drainage holes 111b and a plurality of second drainage holes 115b to improve drainage efficiency.

[0054] Referring to Figures 1, 5, and 6, in one embodiment, the supplementary electrical cabinet 100 further includes a fire suppression module 60, the fire suppression module 60 includes a detection unit 61 and a fire suppression unit, the detection unit 61 is located in the energy storage chamber 113 and includes at least one of a temperature detector, a smoke detector, and a flammable gas detector, the fire suppression unit includes a ventilation component 63 and a fire protection component, both located in the energy storage chamber 113, the ventilation component 63 connects the outside to the energy storage chamber 113 to form air convection, and the fire protection component is used for fire suppression.

[0055] In this embodiment, the detection units 61, such as temperature detectors, smoke detectors, and flammable gas detectors, detect the inside of the cabinet, ensuring that when a hazard occurs, feedback can be provided and action can be taken immediately.

[0056] For example, if the flammable gas detector detects that the concentration of flammable gas in the energy storage chamber 113 has reached a certain limit, the ventilation component 63 will activate. The ventilation component 63 includes an intake device 631 and an exhaust device 633. This causes convection between the air inside and outside the energy storage chamber 113, rapidly reducing the concentration of flammable gas in the energy storage chamber 113 and avoiding safety hazards.

[0057] When a fire occurs in the energy storage room 113, the fire protection components are activated. The fire protection components include a gas fire extinguishing component 65 and / or a water fire extinguishing component 67, the gas fire extinguishing component 65 may, but is not limited to, extinguishing the fire in the form of an aerosol, and the water fire extinguishing component 67 includes a fire extinguishing water pipe and a fire extinguishing nozzle, one end of which is connected to an external water storage device and the other end of which is connected to a fire extinguishing nozzle, which extinguishes the fire by spraying water. The gas fire extinguishing component 65 and the water fire extinguishing component 67 may act individually or simultaneously.

[0058] The detection units 61, such as temperature detectors, smoke detectors, and flammable gas detectors, the ventilation components 63, and the fire protection components may all be numbered and located in a manner that matches the actual needs of the user's location, and their locations include, but are not limited to, the top of the cabinet 10, the bottom of the cabinet 10, the middle of the cabinet 10, and on the door panel 13.

[0059] Referring to Figures 1 and 6, in one embodiment, the complementary electrical cabinet 100 further includes a control module 50, and a control chamber 117 is further provided in the mounting space, the control chamber 117 is located below the liquid cooling chamber 115 and on one side of the energy storage chamber 113, the control module 50 is located within the control chamber 117 and the liquid cooling module 40, Energy storage module It is electrically connected to the complementary module 20, and the control room 117 and the energy storage room 113 are in communication with each other and are arranged in a sealed manner.

[0060] In this embodiment, the control module 50 includes a switch merging unit, an indicator unit, and an emergency stop unit. The switch merging unit controls circuit merging, switches, and the BMU system. The switch merging unit is located in the control room 117, which facilitates maintenance operations and allows for the fulfillment of multiple needs, such as side, bottom, and front wiring of the auxiliary electrical cabinet 100. The indicator unit is an indicator lamp 51, which provides immediate feedback on the operating status of the system. The emergency stop unit is an emergency stop button 53 located on the cabinet 10. Pressing the emergency stop button 53 enables a quick and emergency stop of the operation of the auxiliary electrical cabinet 100.

[0061] Referring to Figures 6 and 7, in this embodiment, the supplementary chamber 111 is located directly above the energy storage chamber 113, the liquid cooling chamber 115 is located to the upper right of the cabinet 10, and the control chamber 117 is located to the lower right of the cabinet 10. The overall layout is neat, aesthetically pleasing, and convenient for water flow, wiring, and fire extinguishing.

[0062] The control room 117 and the energy storage room 113 are sealed off from each other but are also connected, so that excess cold air in the energy storage room 113 flows into the control room 117, dissipating heat from the control module 50.

[0063] The liquid cooling chamber 115 and the control chamber 117 are fully welded and individually designed to prevent the liquid from the liquid cooling chamber 115 from entering the control chamber 117, thereby protecting the control module 50 and meeting the needs of protection and corrosion prevention.

[0064] Here, through-holes for wiring or conduit connections are provided between each of the above-mentioned rooms, and each through-hole is designed to be sealed, with waterproof terminals for the wiring connections.

[0065] Referring to Figures 1 and 6, in one embodiment, the cabinet 10 includes a cabinet body 11 and at least two door panels 13, the cabinet body 11 being provided with a supplementary chamber 111, an energy storage chamber 113, a liquid cooling chamber 115, and a control chamber 117, each open on one side, and each opening of the supplementary chamber 111, the energy storage chamber 113, the liquid cooling chamber 115, and the control chamber 117 is each provided with a seal ring 119, at least one door panel 13 closes the openings of the supplementary chamber 111 and the energy storage chamber 113, at least one door panel 13 closes the openings of the liquid cooling chamber 115 and the control chamber 117, and the door panel 13 abuts against the seal ring 119.

[0066] In this embodiment, one end of the door panel 13 is hinged to the cabinet 10, and when the door panel 13 is closed, the surface of the door panel 13 comes into contact with the seal ring 119, thereby sealing the corresponding compartment.

[0067] The complementary chamber 111 and the energy storage chamber 113, and the liquid cooling chamber 115 and the control chamber 117 all share a door panel 13. That is, the same door panel 13 simultaneously seals off the complementary chamber 111 and the energy storage chamber 113, or the liquid cooling chamber 115 and the control chamber 117. Referring to Figure 6, each chamber opening is provided with one sealing ring 119, so the upper and lower chambers are sufficiently isolated from each other via two layers of sealing rings 119, and the upper and lower chambers do not interfere with each other or communicate with each other. In this way, one door panel 13 can meet the needs of two levels of protection. For example, the complementary chamber 111 and the liquid cooling chamber 115 located above the cabinet 10 meet the IP20 protection need, while the energy storage chamber 113 and the control chamber 117 located below meet the IP54 protection need.

[0068] Referring to Figures 1 and 4, in one embodiment, the complementary electrical cabinet 100 further includes a top cap 70 that is removablely provided on the top of the cabinet 10 and a base 80 that is removablely provided on the bottom of the cabinet 10.

[0069] In this embodiment, the top cap 70, base 80, and cabinet 10 are each machined, molded, colored, and then assembled. This allows for the special processing needs of each part to be met while reducing the weight of the frame and making the manufacturing process easier.

[0070] Preferably, the top cap 70, base 80, and cabinet 10 may be attached and fixed by fasteners, or they may be fixed by welding.

[0071] In one embodiment, the top cap 70 includes an upper corner fitting 71 and a cabinet connecting and fixing member 73. The upper corner fitting 71 meets the needs for bare metal lifting of the top portion of the cabinet 10 and transporting and fixing the entire machine, while the cabinet connecting and fixing member 73 connects the cabinets 10 of adjacent complementary electrical cabinets 100 back-to-back. The base 80 includes fork holes 81, bottom corner members 83, bottom contact points 85, and bottom fixing members 87, facilitating the transport and fixing of the cabinet 10. The base 80 enables rapid front, bottom, or side wiring with other equipment.

[0072] This application further submits an energy storage power plant, which includes an energy storage converter and a supplementary electrical cabinet 100, the specific structure of which can be found in the above embodiment, and the DC-DC converter is electrically connected to the energy storage converter. Since this energy storage power plant employs all the technical proposals of all the above embodiments, it has at least all the beneficial effects of the technical proposals of the above embodiments, which are not elaborated upon here.

[0073] The foregoing are merely preferred embodiments of the present application and do not limit the scope of the patent. Any equivalent structural modifications of the invention described herein, completed in accordance with the description and drawings of this application, or directly or indirectly applied to other related technical fields, all fall within the scope of patent protection of this application. [Explanation of Symbols]

[0074] 100 ···Supplementary Electrical Cabinet 10... Cabinet 11. Cabinet body 111... Complementary room 111a...1st communication hole 111b...1st drainage hole 113 ···Energy Storage Room 115...liquid cooling room 115a...Second communication hole 115b...Second drainage hole 117 ···Control Room 119 ···Seal Ring 13 ···Door Panel 20 ···Complementary Modules 30 ···Battery storage module 31 ···First Battery Cluster 311...Battery pack 33 ···Second Battery Cluster 40 ···Liquid cooling module 41...Main pipeline 43... Branch pipeline 50 ···Control Module 51...Indicator lamp 53...Emergency stop button 60 ··· Fire extinguishing module 61 ···Detection Unit 63...Ventilation components 631 ···Intake system 633... Exhaust system 65...Gas fire extinguishing component 67 ···Water fire extinguishing component 70 ···Top cap 71 ···Upper corner fitting 73... Cabinet connecting and fixing components 80 ···Base 81... Fork holes 83 ···Bottom corner member 85...Bottom grounding point 87 ···Bottom fixing member

Claims

1. A supplementary electrical cabinet applicable to an energy storage power plant, wherein the supplementary electrical cabinet is A cabinet with mounting space provided, A power storage module provided within the aforementioned mounting space, A complementary module provided within the aforementioned mounting space, wherein the complementary module is equipped with a DC-DC converter, and the DC-DC converter is electrically connected to the energy storage module and is used to be electrically connected to an energy storage converter of an energy storage power plant, The supplemental electrical cabinet further includes a liquid cooling module provided within the mounting space and connected to the energy storage module, The aforementioned mounting space is The aforementioned supplementary module is provided in the supplementary room, An energy storage chamber provided on one side of the aforementioned supplementary chamber, wherein the energy storage module is provided within the energy storage chamber, A liquid cooling chamber provided on one side of the supplementary chamber and the energy storage chamber, wherein the liquid cooling module includes a liquid cooling chamber provided within the liquid cooling chamber, The aforementioned energy storage chamber is enclosed and arranged, At least two sides of the cabinet are provided with first communication holes that communicate with the supplementary chamber, and the space between at least two of the first communication holes forms a first duct located within the supplementary chamber, and a first fan is provided within the supplementary chamber, and the first fan and the supplementary module are sequentially located within the first duct. At least two sides of the cabinet are further provided with second communication holes that communicate with the liquid cooling chamber, and the space between at least two of the second communication holes forms a second duct located within the liquid cooling chamber, a second fan is provided within the liquid cooling chamber, and the second fan and the liquid cooling module are sequentially located within the second duct. The supplemental electrical cabinet further includes a control module, and a control chamber is further provided within the mounting space, the control chamber is located below the liquid cooling chamber and on one side of the energy storage chamber, the control module is located within the control chamber and is electrically connected to the liquid cooling module, the energy storage module and the supplemental module. A complementary electrical cabinet characterized in that the control room and the energy storage room are in communication with each other and are arranged in a sealed manner.

2. The bottom wall of the aforementioned storage chamber is arranged at an angle, and the cabinet is provided with a first drain hole that communicates with the storage chamber, so that water entering the storage chamber is discharged from the first drain hole. The supplementary electrical cabinet according to claim 1, characterized in that the bottom wall of the liquid cooling chamber is inclined, and the cabinet is provided with a second drain hole communicating with the liquid cooling chamber, so that water entering the liquid cooling chamber is discharged from the second drain hole.

3. The energy storage module includes at least two battery clusters arranged side by side in the energy storage chamber, the complementary module includes at least two DC-DC converters, one of which is electrically connected to one of the battery clusters. The complementary electrical cabinet according to claim 1, wherein each battery cluster includes a plurality of battery packs, the liquid cooling module includes a main conduit and at least two branch conduits, the plurality of battery packs of one battery cluster are connected in series to correspond to one branch conduit, and at least two branch conduits are arranged in parallel and communicate with the main conduit.

4. The supplementary electrical cabinet further includes a fire extinguishing module, the fire extinguishing module is A detection unit is provided in the energy storage chamber and includes at least one of a temperature detector, a smoke detector, and a combustible gas detector, A supplementary electrical cabinet according to claim 1, comprising a fire extinguishing unit including a ventilation component and a fire protection component, wherein both the ventilation component and the fire protection component are provided within the energy storage chamber, the ventilation component connects the outside with the energy storage chamber to form air convection, and the fire protection component is a fire extinguishing unit used for fire extinguishing.

5. The aforementioned cabinet is A cabinet body having a supplementary chamber, an energy storage chamber, a liquid cooling chamber, and a control chamber, each having an opening on one side, wherein a sealing ring is provided at each opening of the supplementary chamber, the energy storage chamber, the liquid cooling chamber, and the control chamber, The supplementary electrical cabinet according to claim 1, comprising at least two door panels, at least one of which closes the openings of the supplementary chamber and the energy storage chamber, at least one of which closes the openings of the liquid cooling chamber and the control chamber, and the door panels which abut against the seal ring.

6. The supplementary electrical cabinet further includes a top cap that is removablely provided on the top of the cabinet and a base that is removablely provided on the bottom of the cabinet. The supplementary electrical cabinet according to claim 1, characterized in that a drain pan is provided at the bottom of the mounting space, a water receiving tank is provided in the drain pan, and a communication opening is provided in the bottom wall of the water receiving tank to connect the water receiving tank to the outside.

7. An energy storage power plant, wherein the energy storage power plant is Energy storage converter, An energy storage power plant comprising a supplementary electrical cabinet according to any one of claims 1 to 6, wherein the DC-DC converter is electrically connected to the energy storage converter.

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