Complementary Electric Cabinet and Energy Storage Power Plant

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 Patent Office 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, and 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 large-scale energy storage power plants cannot be easily replenished. 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] The main purpose of this application is to provide a complementary electric cabinet by assembling a complementary module and an energy storage module in one cabinet to achieve a high degree of integration of the complementary electric cabinet, facilitating transportation, grid connection, operation, and maintenance.

Means for Solving the Problem

[0006] To achieve the above object, the present application provides a complementary electrical cabinet applied to an energy storage power plant. The complementary electrical cabinet includes a cabinet provided with an installation space, a power storage module provided in the installation space, and a complementary module 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 is 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 in the installation space and connected to the power storage module.

[0008] In one embodiment, the installation space a complementary chamber provided with the complementary module, an energy storage chamber provided on one side of the complementary chamber, wherein the power storage module is provided in the energy storage chamber, a liquid cooling chamber provided on one side of the complementary chamber and the energy storage chamber, wherein the liquid cooling module is provided in the liquid cooling chamber, the energy storage chamber is arranged to be sealed.

[0009] In one embodiment, at least both sides of the cabinet are provided with first communication holes communicating with the complementary chamber, and a first duct provided in the complementary chamber is formed between the first communication holes on at least both sides. A first fan is provided in the complementary chamber, and the first fan and the complementary module are sequentially provided in the first duct. On at least both sides of the cabinet, a second communication hole communicating with the liquid cooling chamber is further provided. Between the second communication holes on at least both sides, a second duct provided in the liquid cooling chamber is formed. A second fan is provided in the liquid cooling chamber, and the second fan and the liquid cooling module are sequentially provided in the second duct.

[0010] In one embodiment, the bottom wall of the replenishment chamber is disposed obliquely. In the cabinet, a first drain hole communicating with the replenishment chamber is provided, and water entering the replenishment chamber is discharged from the first drain hole. And / or, the bottom wall of the liquid cooling chamber is disposed obliquely. In the cabinet, a second drain hole communicating with the liquid cooling chamber is provided, and 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 in parallel in the energy storage chamber. The replenishment module includes at least two DCDC converters. One of the DCDC converters is electrically connected to correspond to one of the battery clusters. Each of the battery clusters includes a plurality of battery packs. The liquid cooling module includes a main pipeline and at least two branch pipelines. The plurality of battery packs of one of the battery clusters are connected in series to correspond to one of the branch pipelines. The at least two branch pipelines are arranged in parallel connection and communicate with the main pipeline.

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

[0013] In one embodiment, the supplementary electrical cabinet further includes a control module, a control room is further provided in the installation space, the control room is provided below the liquid cooling chamber and is located on one side of the energy storage chamber, the control module is provided in the control room and is electrically connected to the liquid cooling module, the energy storage module and the supplementary module. The control room communicates with the energy storage chamber and is arranged in a sealed manner.

[0014] In one embodiment, the cabinet is a cabinet body provided with a supplementary chamber with one side open, the energy storage chamber, the liquid cooling chamber and the control room, and seal rings are provided at the openings of the supplementary chamber, the energy storage chamber, the liquid cooling chamber and the control room. It includes at least two door panels, at least one of the door panels closes the openings of the supplementary chamber and the energy storage chamber, at least one of the door panels closes the openings of the liquid cooling chamber and the control room, and the door panels are in contact with the seal rings.

[0015] In one embodiment, the supplementary electrical cabinet further includes a top cap removably provided at the top of the cabinet and a pedestal removably provided at the bottom of the cabinet. And / or, a drain pan is provided at the bottom of the installation space, a water receiving tank is provided in the drain pan, and a communication port for communicating the water receiving tank with the outside is provided on the bottom wall of the water receiving tank.

[0016] This application further provides an energy storage power plant, which includes an energy storage converter, and a complementary electric cabinet according to 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 a 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 support multiple applications.

[0018] To clearly explain the technical solutions of the embodiments of this application or the prior art, 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

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0020] Regarding the realization of the object, functional characteristics and advantages of the present application, in combination with the embodiments, it will be further described with reference to the drawings.

[0021] Hereinafter, in combination with 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 not all embodiments, but only some embodiments of the present application. Based on the embodiments of the present application, on the premise 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.

[0022] Here, all the 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] Also, the descriptions such as "first", "second", etc. 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 the embodiments 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 the complementary electrical cabinet and facilitate transportation, system connection, and operation and maintenance, the present application proposes a complementary electrical cabinet 100.

[0025] Referring to FIGS. 1 to 7, in some embodiments of the present application, the complementary electrical cabinet 100 is applied to an energy storage power plant. The complementary electrical cabinet 100 includes a cabinet 10, a power storage module 30, and a complementary module 20. An installation space is provided in the cabinet 10. Both the power storage module 30 and the complementary module 20 are provided in the installation space. A DCDC converter is provided in the complementary module 20. The DCDC converter is electrically connected to the power storage module 30 and is also electrically connected to the energy storage converter of the energy storage power plant.

[0026] Referring to FIGS. 1 and 6, in one embodiment, the cabinet 10 is substantially rectangular parallelepiped-shaped, and an installation space for installing various electrical devices is provided inside it. The power storage module 30 includes a plurality of battery packs 311 connected in series or in parallel with each other, and has one input-output side. One end of the DCDC converter is connected to the input-output side of the power storage module 30, and the other end is connected to the energy storage converter of the energy storage power plant.

[0027] The DC terminal of the energy storage converter is connected to the DCDC converter, and the AC terminal is connected to the power grid or the load. Generally, before being connected to the complementary electrical cabinet, the energy storage power plant is provided with some power storage modules 30. The input-output terminals of the existing power storage module 30 are connected to the DC terminal of the energy storage converter. The DCDC converter of this embodiment is connected to the input-output terminals of the existing power storage module 30, thereby being connected to the energy storage converter.

[0028] The main circuit of the DCDC converter may be a three-level BUCK-BOOST circuit or a two-level BUCK-BOOST circuit, and is not limited here. This embodiment does not limit the connection form of the battery packs 311 of the power storage module 30.

[0029] In this embodiment, when the complementary electric cabinet 100 is applied to an energy storage power plant, the energy storage module 30 of the complementary electric cabinet 100 is connected to the energy storage converter via the complementary module 20, without affecting the existing energy storage module 30 and the output capacity of the energy storage power plant. And in this embodiment, the complementary module 20 and the energy storage module 30 are integrated in one cabinet 10, so that the whole can be transported and installed, saving the floor area, making the wiring and system connection convenient, 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 100 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.

[0030] Referring to FIG. 6, in one embodiment, the complementary electric cabinet 100 is provided in an installation space and further includes a liquid cooling module 40 connected to the energy storage module 30. In this embodiment, by dissipating heat from the energy storage module 30 through the liquid cooling module 40, the occupied space is smaller and the heat dissipation efficiency is higher.

[0031] Specifically, in one embodiment, the energy storage module 30 includes at least two battery clusters arranged in parallel in the energy storage chamber 113, the complementary module 20 includes at least two DCDC converters, and one DCDC converter is electrically connected to correspond to one battery cluster. Each battery cluster includes a plurality of battery packs 311. The liquid cooling module 40 includes a main pipeline 41 and at least two branch pipelines 43. The plurality of battery packs 311 of one battery cluster are serially connected to correspond to one branch pipeline 43. The at least two branch pipelines 43 are arranged in parallel connection and communicate with the main pipeline 41.

[0032] In this embodiment, the main pipeline 41 includes a water inlet pipe and a drain pipe that enter the energy storage chamber 113 from the liquid cooling chamber 115. The branch pipeline 43 serially connects a plurality of liquid cooling passages in the battery cluster. One end of the branch pipeline 43 is connected to the water inlet pipe, and the other end is connected to the drain pipe. One branch pipeline 43 is provided corresponding to one battery cluster.

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

[0034] Of course, the liquid cooling module 40 includes a water pump and a refrigeration unit. The water pump, the main pipeline 41, the branch pipeline 43, the refrigeration unit, and the 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 the temperature of the coolant.

[0035] Furthermore, a drain pan is provided at the bottom of the installation space, and a water receiving tank is provided in the drain pan. The leaked coolant is collected in the water receiving tank. The shape of the water receiving tank is not limited, but it substantially covers the bottom of the entire installation space. A communication port for communicating the water receiving tank with the outside is provided on the bottom wall of the water receiving tank. The communication port is always closed to meet the sealing requirement. When the communication port is opened, the liquid in the water receiving tank is discharged.

[0036] Preferably, the opening and closing of the communication port are controlled by an insertion switch inside it.

[0037] Referring to FIGS. 6 and 7, in one embodiment, the installation space includes a complementary chamber 111, an energy storage chamber 113, and a liquid cooling chamber 115. The complementary module 20 is provided in the complementary chamber 111. The energy storage chamber 113 is provided on one side of the complementary chamber 111. The power storage module 30 is provided in the energy storage chamber 113. The liquid cooling chamber 115 is provided on one side of the complementary chamber 111 and the energy storage chamber 113. The liquid cooling module 40 is provided in the liquid cooling chamber 115. The energy storage chamber 113 is hermetically arranged.

[0038] In this embodiment, the energy storage chamber 113 is arranged in a sealed manner to prevent external particulate foreign matters and the like from entering the energy storage chamber 113 and affecting the normal operation of devices such as the internal energy storage modules, thereby ensuring the safety of the devices. Also, the sealed energy storage chamber 113 arranged in this way avoids forming convection with the outside, and better maintains the temperature and heat dissipation effect.

[0039] Here, by performing sealing treatment on the water inlet pipe, the drain pipe, and the connection terminals between the power storage module 30 and the complementary module 20, the sealed environment of the energy storage chamber 113 is guaranteed.

[0040] In one embodiment, at least both sides of the cabinet 10 are provided with first communication holes 111a communicating with the complementary chamber 111. Between the first communication holes 111a on at least both sides, a first duct provided in the complementary chamber 111 is formed. A first fan is provided in the complementary chamber 111, and the first fan and the complementary module 20 are sequentially provided in the first duct.

[0041] At least both sides of the cabinet 10 are further provided with second communication holes 115a communicating with the liquid cooling chamber 115. Between the second communication holes 115a on at least both sides, a second duct provided in the liquid cooling chamber 115 is formed. A second fan is provided in the liquid cooling chamber 115, and the second fan and the liquid cooling module 40 are sequentially provided in the second duct.

[0042] In this embodiment, the first communication holes 111a are provided on the front side, the top portion, and the backplane of the cabinet 10, forming a first duct that intakes air from the front and exhausts air from the back side and the top portion. In order to form air convection inside and outside the complementary chamber 111, a first fan is provided in the first communication holes 111a on the top portion and / or the backplane.

[0043] Similarly, the front side, the right side, and the backplane of the cabinet 10 are all provided with second communication holes 115a, forming a second duct that intakes air from the front and exhausts air from the right side and the back side. In order to form air convection inside and outside the liquid cooling chamber 115, second fans are provided in the second communication holes 115a on the right side and / or the backplane.

[0044] Preferably, the plurality of first communication holes 111a and the plurality of second communication holes 115a are provided in regions of the cabinet. By setting the aperture diameters of each of the first communication holes 111a and the second communication holes 115a to be small, it is possible to avoid large foreign objects from entering the supplementary chamber 111 and the liquid cooling chamber 115 and affecting the normal operation of the device.

[0045] The first communication holes 111a and the second communication holes 115a may be square holes, circular holes, etc., and are not limited here.

[0046] Of course, in other embodiments of the present application, the first duct may be further provided to intake air from the front side and the upper side and exhaust air from the back side, and the second duct may be further provided to intake air from the front side and the right side and exhaust air from the back side.

[0047] Referring to FIGS. 2 and 3, in one embodiment, the bottom wall of the supplementary chamber 111 is disposed obliquely, and the cabinet 10 is provided with a first drain hole 111b communicating with the supplementary chamber 111, so that the water that enters the supplementary chamber 111 is discharged from the first drain hole 111b.

[0048] The oblique arrangement means that the bottom wall is provided so as to form an angle with the plane where it is located and the horizontal plane, and the first drain hole 111b is provided on the side with a lower height.

[0049] In this embodiment, the height of the bottom wall gradually decreases from the front side to the rear side of the cabinet 10, and the first drain hole 111b is provided on the backplane. A first communication hole 111a is provided in the top portion of the cabinet 10, so that rainwater can easily enter the replenishment chamber 111 from the first communication hole 111a. With a bottom wall arranged in an inclined manner, water can move along the bottom wall to the first drain hole 111b and be discharged, avoiding water accumulation and ensuring the safety of the equipment.

[0050] Furthermore, the bottom wall of the liquid cooling chamber 115 is arranged in an inclined manner, and the cabinet 10 is provided with a second drain hole 115b communicating 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 from the second drain hole 115b.

[0051] Preferably, guide grooves extending in the front-rear direction are provided on the bottom wall of the replenishment chamber 111 and the bottom wall of the liquid cooling chamber 115 to guide water droplets or water flows.

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

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

[0054] Referring to FIGS. 1, 5, and 6, in one embodiment, the supplementary electrical cabinet 100 further includes a fire extinguishing module 60. The fire extinguishing module 60 includes a detection unit 61 and a fire extinguishing unit. The detection unit 61 is provided in the energy storage chamber 113 and includes at least one of a temperature detector, a smoke detector, and a combustible gas detector. The fire extinguishing unit includes a ventilation component 63 and a fire prevention component. Both the ventilation component 63 and the fire prevention component are provided in the energy storage chamber 113. The ventilation component 63 communicates the outside with the energy storage chamber 113 to form air convection, and the fire prevention component is used for fire extinguishing.

[0055] In this embodiment, detection units 61 such as temperature detectors, smoke detectors, and combustible gas detectors detect inside the cabinet to ensure that when a danger occurs, it can be immediately feedback and dealt with.

[0056] For example, when the combustible gas detector detects that the concentration of combustible gas in the energy storage chamber 113 has reached a certain limit value, the ventilation component 63 operates. The ventilation component 63 includes an intake device 631 and an exhaust device 633. Thereby, the internal and external air of the energy storage chamber 113 forms convection to rapidly reduce the concentration of combustible gas in the energy storage chamber 113 and avoid safety hazards.

[0057] When a fire occurs in the energy storage chamber 113, the fire prevention component is activated. The fire prevention component includes a gas fire extinguishing component 65 and / or a water fire extinguishing component 67. The gas fire extinguishing component 65 may extinguish the fire in the form of aerosol, but is not limited thereto. The water fire extinguishing component 67 includes a fire extinguishing water pipe and a fire extinguishing nozzle. One end of the fire extinguishing water pipe is connected to an external water storage device, and the other end is connected to the fire extinguishing nozzle. The fire extinguishing nozzle sprays water to extinguish the fire. 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 the above temperature detectors, smoke detectors, and combustible gas detectors, the ventilation component 63, and the fire prevention component may all be matched according to the actual needs of the user's location in terms of their number and position. The position includes the top of the cabinet 10, the bottom of the cabinet 10, the middle of the cabinet 10, and the door panel 13, but is not limited thereto.

[0059] Referring to FIGS. 1 and 6, in one embodiment, the complementary electrical cabinet 100 further includes a control module 50. A control room 117 is further provided in the installation space. The control room 117 is provided below the liquid cooling room 115 and is located on one side of the energy storage room 113. The control module 50 is provided in the control room 117 and is electrically connected to the liquid cooling module 40, the energy storage module, and the complementary module 20. The control room 117 communicates with the energy storage room 113 and is arranged in a sealed manner.

[0060] In this embodiment, the control module 50 includes a switch merging unit, an indication unit, and an emergency stop unit. The switch merging unit controls circuit merging, switches, and the BMU system. By being provided in the control room 117, the switch merging unit can facilitate maintenance operations and meet the possibilities of multiple needs such as side wire extraction, bottom wire extraction, and front wire extraction of the complementary electrical cabinet 100. The indication unit is an indication lamp 51, which immediately feedbacks the operating state of the system. The emergency stop unit is an emergency stop button 53 provided on the cabinet 10. When the emergency stop button 53 is pressed, the rapid and emergency stop of the operation of the complementary electrical cabinet 100 can be realized.

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

[0062] The control room 117 and the energy storage room 113 are arranged in a sealed manner and communicate with each other. As a result, the extra cold air in the energy storage room 113 flows into the control room 117 to dissipate heat from the control module 50.

[0063] Between the liquid cooling chamber 115 and the control chamber 117, they are completely welded and designed individually, thereby avoiding the liquid in the liquid cooling chamber 115 from entering the control chamber 117, meeting the needs of protection and corrosion prevention, and protecting the control module 50.

[0064] Here, through holes for wiring or pipeline connection are provided between each of the above chambers, and a sealing design is performed for each through hole. The wiring terminals for connection are waterproof terminals.

[0065] Referring to FIGS. 1 and 6, in one embodiment, the cabinet 10 includes a cabinet body 11 and at least two door panels 13. In the cabinet body 11, a complementary chamber 111 with one side open, an energy storage chamber 113, a liquid cooling chamber 115, and a control chamber 117 are provided. Sealing rings 119 are provided at the openings of the complementary chamber 111, the energy storage chamber 113, the liquid cooling chamber 115, and the control chamber 117. At least one door panel 13 closes the openings of the complementary 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 sealing ring 119.

[0066] In this embodiment, one end of the door panel 13 is hinged to the cabinet 10. When the door panel 13 is closed, the surface of the door panel 13 abuts against the sealing ring 119 to achieve the sealing of the corresponding chamber.

[0067] The replenishment room 111, the energy storage room 113, the liquid cooling room 115, and the control room 117 all adopt a design that shares the door panel 13, that is, the same door panel 13 is used to simultaneously seal the replenishment room 111 and the energy storage room 113, or the liquid cooling room 115 and the control room 117. Referring to FIG. 6, since one seal ring 119 is provided at the opening of each room, the upper and lower rooms are sufficiently isolated through two layers of seal rings 119, and the upper and lower rooms do not interfere with each other and are not in communication. In this way, with one door panel 13, the needs of two protection levels can be realized. For example, the replenishment room 111 and the liquid cooling room 115 above the cabinet 10 meet the protection needs of IP20, and the energy storage room 113 and the control room 117 below meet the protection needs of IP54.

[0068] Referring to FIGS. 1 and 4, in one embodiment, the replenishment electric cabinet 100 further includes a top cap 70 removably provided at the top of the cabinet 10 and a pedestal 80 removably provided at the bottom of the cabinet 10.

[0069] In this embodiment, the top cap 70, the pedestal 80, and the cabinet 10 are each processed, formed, colored, and then assembled. Therefore, while meeting the special processing needs of each part, the weight of the frame is reduced, making the processing and manufacturing easier.

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

[0071] In one embodiment, the top cap 70 includes an upper corner fitting 71 and a cabinet connection and fixing member 73. The upper corner fitting 71 meets the needs of lifting the bare metal at the top of the cabinet 10 and fixing the transportation of the whole machine, and the cabinet connection and fixing member 73 arranges and connects the cabinet 10 with another adjacent complementary electrical cabinet 100 back to back. The pedestal 80 includes a fork hole 81, a bottom corner member 83, a bottom grounding point 85, and a bottom fixing member 87, which facilitates the transportation and fixing of the cabinet 10. The pedestal 80 can realize rapid front, bottom or side wiring with other devices.

[0072] This application further submits an energy storage power plant, and the energy storage power generation includes an energy storage converter and a complementary electrical cabinet 100. For the specific structure of the complementary electrical cabinet 100, reference may be made to the above embodiments. The DCDC converter is electrically connected to the energy storage converter. Since the energy storage power plant adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects of the technical solutions of the above embodiments, and there is no need to elaborate here.

[0073] The above are only preferred embodiments of this application, which do not limit the patent scope of this application. Based on the inventive concept of this application, equivalent structural changes completed according to the content of the specification and drawings of this application, or those directly / indirectly applied to other related technical fields all belong to the scope of patent protection of this application.

Explanation of Reference Signs

[0074] 100 ··· Complementary Electrical Cabinet 10 ··· Cabinet 11 ··· Cabinet Body 111 ··· Complementary Chamber 111a ··· First Communication Hole 111b ··· First Drain Hole 113 ··· Energy Storage Chamber 115 ··· Liquid Cooling Chamber 115a ··· Second Communication Hole 115b ··· Second Drain Hole 117 ··· Control Room 119 ··· Seal Ring 13 ··· Door Panel 20 ··· Complementary Module 30 ··· Energy 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 Component 631 ··· Intake Device 633 ··· Exhaust Device 65 ··· Gas Fire Extinguishing Component 67 ··· Water Fire Extinguishing Component 70 ··· Top Cap 71 ··· Upper Angle Fitting 73 ··· Cabinet Connection and Fixing Member 80 ··· Pedestal 81 ··· Fork Hole 83 ··· Bottom Corner Member 85 ··· Bottom Grounding Point 87 ··· Bottom Fixing Member

Claims

1. A complementary electrical cabinet applied to an energy storage power plant, wherein the complementary electrical cabinet comprises: a cabinet provided with an installation space; a power storage module provided in the installation space; a complementary module provided in the installation space, wherein a DC-DC converter is provided in the complementary module, and the DC-DC converter is electrically connected to the power storage module and is used for being electrically connected to an energy storage converter of the energy storage power plant. The complementary electrical cabinet is characterized by including the complementary module.

2. The complementary electrical cabinet according to claim 1, further comprising a liquid cooling module provided in the installation space and connected to the power storage module.

3. The installation space includes: a complementary chamber provided with the complementary module; an energy storage chamber provided on one side of the complementary chamber, wherein the power storage module is provided in the energy storage chamber; a liquid cooling chamber provided on one side of the complementary chamber and the energy storage chamber, wherein the liquid cooling module is provided in the liquid cooling chamber. The energy storage chamber is arranged in a sealed manner. The complementary electrical cabinet according to claim 2 is characterized by this.

4. At least both sides of the cabinet are provided with first communication holes communicating with the complementary chamber. A first duct provided in the complementary chamber is formed between the first communication holes on at least both sides. A first fan is provided in the complementary chamber, and the first fan and the complementary module are sequentially provided in the first duct. At least both sides of the cabinet are further provided with second communication holes communicating with the liquid cooling chamber. A second duct provided in the liquid cooling chamber is formed between the second communication holes on at least both sides. A second fan is provided in the liquid cooling chamber, and the second fan and the liquid cooling module are sequentially provided in the second duct. The complementary electrical cabinet according to claim 3 is characterized by this.

5. The bottom wall of the complementary chamber is arranged in an inclined manner. The cabinet is provided with a first drain hole communicating with the complementary chamber, and water entering the complementary chamber is discharged from the first drain hole. ​ And / or, the bottom wall of the liquid cooling chamber is disposed obliquely, and the cabinet is provided with a second drain hole communicating with the liquid cooling chamber, and water entering the liquid cooling chamber is discharged from the second drain hole. The complementary electric cabinet according to claim 4, characterized in that.

6. The energy storage module includes at least two battery clusters arranged in parallel in the energy storage chamber, the complementary module includes at least two DC-DC converters, and one of the DC-DC converters is electrically connected to correspond to one of the battery clusters. Each of the battery clusters includes a plurality of battery packs, the liquid cooling module includes a main pipeline and at least two branch pipelines, the plurality of battery packs of one of the battery clusters are connected in series to correspond to one of the branch pipelines, and at least two of the branch pipelines are arranged in parallel connection and communicate with the main pipeline. The complementary electric cabinet according to claim 3, characterized in that.

7. The complementary electric cabinet further includes a fire extinguishing module, and the fire extinguishing module Is provided in the energy storage chamber, and includes a detection unit including at least one of a temperature detector, a smoke detector, and a combustible gas detector. A fire extinguishing unit including a ventilation component and a fire prevention component, wherein both the ventilation component and the fire prevention component are provided in the energy storage chamber, the ventilation component communicates the outside with the energy storage chamber to form an air convection, and the fire prevention component is a fire extinguishing unit used for fire extinguishing. The complementary electric cabinet according to claim 3, characterized in that it includes.

8. The complementary electric cabinet further includes a control module, a control room is further provided in the installation space, the control room is provided below the liquid cooling chamber and is located on one side of the energy storage chamber, the control module is provided in the control room and is electrically connected to the liquid cooling module, the energy storage module, and the complementary module. The control room communicates with the energy storage chamber and is arranged in a sealed manner. The complementary electric cabinet according to claim 3, characterized in that.

9. The cabinet A cabinet body provided with the complementary chamber, the energy storage chamber, the liquid cooling chamber, and the control chamber, one side of which is open, and seal rings are provided at the openings of the complementary chamber, the energy storage chamber, the liquid cooling chamber, and the control chamber. At least two door panels, at least one of the door panels closes the openings of the complementary chamber and the energy storage chamber, at least one of the door panels closes the openings of the liquid cooling chamber and the control chamber, and the door panels are in contact with the seal rings. The supplementary electric cabinet according to claim 8, characterized by comprising at least two door panels.

10. The supplementary electric cabinet further includes a top cap removably provided on the top of the cabinet and a pedestal removably provided on 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 port for communicating the water receiving tank with the outside is provided on the bottom wall of the water receiving tank. The supplementary electric cabinet according to claim 1, characterized by this.

11. An energy storage power plant, wherein the energy storage power plant An energy storage converter The energy storage power plant according to claim 1, characterized by including the supplementary electric cabinet according to any one of claims 1 to 10, and the DC-DC converter is electrically connected to the energy storage converter.

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