WO2024087882A1

WO2024087882A1 - Supplementary electrical cabinet and energy storage power station

Info

Publication number: WO2024087882A1
Application number: PCT/CN2023/116404
Authority: WO
Inventors: 张伟; 李华栋; 周猛
Original assignee: 阳光电源股份有限公司
Priority date: 2022-10-27
Filing date: 2023-09-01
Publication date: 2024-05-02
Also published as: CN218783151U

Abstract

A supplementary electrical cabinet and an energy storage power station. The supplementary electrical cabinet comprises a cabinet body, a power storage module and a supplementary module, wherein the cabinet body is provided with a mounting space, the power storage module and the supplementary module are both arranged in the mounting space, the supplementary module is provided with a DCDC converter, the DCDC converter is electrically connected to the power storage module, and the DCDC converter is used for electrically connecting to an energy storage inverter of the energy storage power station. When the supplementary electrical cabinet is applied to the energy storage power station, the power storage module of the supplementary electrical cabinet is connected to the energy storage inverter by means of the supplementary module, which does not affect the output capability of an original power storage module and energy storage power station. Moreover, the supplementary module and the power storage module are integrated inside one cabinet body, so as to be transported and mounted as a whole, such that the occupied area is reduced, wiring and grid connection are convenient, and overhaul or maintenance can also be performed on the supplementary module and the power storage module at the same time in the later period conveniently and quickly. When grid connection between the supplementary electrical cabinet and the energy storage power station cannot be performed, the supplementary electrical cabinet can also be used as a small-sized energy storage apparatus, thereby realizing a multipurpose cabinet.

Description

Additional power cabinets and energy storage power stations

This application claims the priority of the Chinese patent application filed with the China Patent Office on October 27, 2022, with application number 202222852949.7 and invention name “Supplementary Electric Cabinet and Energy Storage Power Station”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the technical field of power storage facilities, and in particular to an additional power cabinet and an energy storage power station.

Background technique

With the steady development of the industrial and commercial energy storage market, the amount of ground energy storage installed continues to increase. Due to its own attenuation characteristics, the energy of the energy storage battery will gradually decrease as the use time increases. In order to ensure the rated dischargeable battery power of the grid connection point and reduce the initial investment cost of the energy storage power station, the owner usually chooses to use small-granularity energy storage products to supplement several times during the life cycle of the energy storage power station.

Existing industrial and commercial energy storage cabinets usually do not have the function of directly connecting to energy storage power stations, and cannot easily supplement large energy storage power stations. In addition, the existing industrial and commercial air-cooled energy storage system has low heat dissipation efficiency, high energy consumption, and a large temperature control range, which has a great impact on the life of the battery cell.

Summary of the invention

The main purpose of this application is to provide an additional power cabinet, which aims to assemble the additional module and the energy storage module in a cabinet to achieve high integration of the additional power cabinet, making it easy to transport, connect to the grid and operate and maintain.

To achieve the above-mentioned purpose, the present application proposes an additional power cabinet, which is applied to an energy storage power station. The additional power cabinet includes: a cabinet body, which is provided with an installation space; a power storage module, which is arranged in the installation space; and an additional module, which is arranged in the installation space, and the additional module is provided with a DCDC converter, which is electrically connected to the power storage module, and the DCDC converter is used to be electrically connected to the energy storage inverter of the energy storage power station.

In one embodiment, the supplementary electrical cabinet further includes a liquid cooling module, the liquid cooling module is disposed in the installation space, and the liquid cooling module is connected to the power storage module.

In one embodiment, the installation space includes:

A supplementary warehouse, wherein the supplementary module is arranged in the supplementary warehouse;

An energy storage bin, the energy storage bin being arranged at one side of the supplementary bin, and the power storage module being arranged in the energy storage bin; and

A liquid cooling warehouse, the liquid cooling warehouse is arranged on one side of the supplementary warehouse and the energy storage warehouse, and the liquid cooling module is arranged in the liquid cooling warehouse;

Wherein, the energy storage bin is sealed.

In one embodiment, at least two sides of the cabinet are provided with first communication holes connected to the supplementary bin, and a first air duct arranged in the supplementary bin is formed between the first communication holes on at least two sides, a first fan is arranged in the supplementary bin, and the first fan and the supplementary module are arranged in the first air duct in sequence;

At least two sides of the cabinet are further provided with second connecting holes connected to the liquid cooling warehouse, and a second air duct arranged in the liquid cooling warehouse is formed between the second connecting holes on at least two sides. A second fan is arranged in the liquid cooling warehouse, and the second fan and the liquid cooling module are sequentially arranged in the second air duct.

In one embodiment, the bottom wall of the supplementary bin is inclined, and the cabinet is provided with a first drainage hole connected to the supplementary bin, so that water entering the supplementary bin can be discharged from the first drainage hole;

And/or, the bottom wall of the liquid cooling bin is tilted, and the cabinet is provided with a second drainage hole connected to the liquid cooling bin, so that water entering the liquid cooling bin can be discharged from the second drainage hole.

In one embodiment, the power storage module includes at least two battery clusters, at least two of the battery clusters are arranged in parallel in the energy storage bin, and the supplementary module includes at least two DCDC converters, one of the DCDC converters is electrically connected to one of the battery clusters;

Each of the battery clusters includes a plurality of battery packs, and the liquid cooling module includes a main pipeline and at least two branch pipelines, one branch pipeline corresponds to the plurality of battery packs of the battery cluster connected in series, and at least two branch pipelines are arranged in parallel and connected to the main pipeline.

In one embodiment, the supplementary electrical cabinet further includes a fire protection module, and the fire protection module includes:

A detection unit, the detection unit is arranged in the energy storage bin, and the detection unit includes at least one of a temperature detector, a smoke detector and a combustible gas detector; and

The fire fighting unit includes a ventilation component and a fire protection component. Both the ventilation component and the fire protection component are arranged in the energy storage bin. The ventilation component can connect the outside world and the energy storage bin to form air convection. The fire protection component is used for fire extinguishing.

In one embodiment, the supplementary electric cabinet further includes a control module, and a control compartment is further provided in the installation space, the control compartment is provided below the liquid cooling compartment and located on one side of the energy storage compartment, the control module is provided in the control compartment, and is electrically connected to the liquid cooling module, the energy storage module and the supplementary module;

Wherein, the control compartment is connected to the energy storage compartment, and the control compartment and the energy storage compartment are sealed.

In one embodiment, the cabinet comprises:

A cabinet body, wherein the cabinet body is provided with the supplementary bin, the energy storage bin, the liquid cooling bin and the control bin with an opening on one side, and sealing rings are provided at the openings of the supplementary bin, the energy storage bin, the liquid cooling bin and the control bin; and at least two door panels, at least one of which blocks the openings of the supplementary bin and the energy storage bin, and at least one of which blocks the openings of the liquid cooling bin and the control bin, and the door panels press against the sealing rings.

In one embodiment, the supplementary electric cabinet further comprises a top cover and a base, wherein the top cover is detachably arranged on the top of the cabinet body, and the base is detachably arranged on the bottom of the cabinet body;

And/or, a water receiving tray is provided at the bottom of the installation space, the water receiving tray is provided with a water receiving trough, the bottom wall of the water receiving trough is provided with a connecting port, and the connecting port is used to connect the water receiving trough with the outside.

The present application also proposes an energy storage power station, which includes:

An energy storage converter; and an additional power cabinet as described in any of the above embodiments, wherein the DCDC converter is electrically connected to the energy storage converter.

In the technical solution of the present application, when the supplementary electric cabinet is applied to the energy storage power station, the power storage module of the supplementary electric cabinet is connected to the energy storage inverter through the supplementary module, which does not affect the output capacity of the original power storage module and the energy storage power station. Moreover, the present application integrates the supplementary module and the power storage module into one cabinet, which can be transported and installed as a whole, saving floor space and facilitating wiring and grid connection. It can also be inspected or maintained at the same time in the later stage, which is convenient and fast. When the supplementary electric cabinet is not connected to the energy storage power station, it can also be used as a small energy storage device, realizing multiple uses of one cabinet.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

FIG1 is a front structural diagram of an additional electric cabinet according to an embodiment of the present application;

FIG2 is a schematic diagram of the back structure of the additional electric cabinet in FIG1;

FIG3 is an enlarged schematic diagram of point A in FIG2 ;

FIG4 is a schematic structural diagram of the additional electric cabinet in FIG1 from another perspective;

FIG5 is a schematic diagram of the internal structure of an additional electric cabinet according to an embodiment of the present application;

FIG6 is a schematic diagram of the internal structure of an additional electric cabinet according to an embodiment of the present application;

FIG. 7 is a schematic diagram of the internal structure of another embodiment of the supplementary electrical cabinet of the present application.

Description of Figure Numbers:

The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, the descriptions related to "first", "second", etc. in this application are only for descriptive purposes. It cannot be understood as indicating or implying its relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

In order to achieve high integration of the supplementary power cabinet and facilitate its transportation, grid connection and operation and maintenance, the present application proposes a supplementary power cabinet 100.

1 to 7 , in some embodiments of the present application, an additional power cabinet 100 is applied to an energy storage power station. The additional power cabinet 100 includes a cabinet 10, a power storage module 30 and an additional module 20. The cabinet 10 is provided with an installation space, and the power storage module 30 and the additional module 20 are both arranged in the installation space. The additional module 20 is provided with a DCDC converter, which is electrically connected to the power storage module 30, and the DCDC converter is used to be electrically connected to the energy storage converter of the energy storage power station.

1 and 6, in one embodiment, the cabinet 10 is roughly in the shape of a rectangular parallelepiped, and is provided with installation spaces for installing various electrical equipment. The power storage module 30 includes a plurality of battery packs 311 connected in series or in parallel, which have an input and output side, one end of the DCDC converter is connected to the input and output side of the power storage module 30, and the other end is connected to the energy storage converter of the energy storage power station.

The DC end of the energy storage converter is connected to the DCDC converter, and the AC end is connected to the power grid or load. Generally, the energy storage power station has a part of the power storage module 30 before connecting to the supplementary power cabinet, and the input and output ends of the original power storage module 30 are connected to the DC end of the energy storage converter. The DCDC converter of this embodiment can be connected to the input and output ends of the original power storage module 30 to connect to the energy storage converter.

The main circuit of the DCDC converter can be a three-level BUCK-BOOST circuit or a two-level BUCK-BOOST circuit, which is not limited here. This embodiment does not limit the connection form of the battery pack 311 of the power storage module 30.

In this embodiment, when the supplementary electric cabinet 100 is applied to the energy storage power station, the power storage module 30 of the supplementary electric cabinet 100 is connected to the energy storage inverter through the supplementary module 20, which does not affect the output capacity of the original power storage module 30 and the energy storage power station. Moreover, in this embodiment, the supplementary module 20 and the power storage module 30 are integrated into a cabinet 10, which can be transported and installed as a whole, saving floor space and facilitating wiring and grid connection. It can also be repaired or maintained at the same time in the later stage, which is convenient and fast. When the power station is connected to the grid, it can also be used as a small energy storage device, achieving multiple uses in one cabinet.

6 , in one embodiment, the supplementary electric cabinet 100 further includes a liquid cooling module 40, which is disposed in the installation space and connected to the power storage module 30. In this embodiment, the liquid cooling module 40 is used to dissipate heat from the power storage module 30, which occupies less space and has higher heat dissipation efficiency.

Specifically, in one embodiment, the power storage module 30 includes at least two battery clusters, and the at least two battery clusters are arranged in parallel in the energy storage bin 113. The supplementary module 20 includes at least two DCDC converters, and one DCDC converter is electrically connected to one battery cluster; each battery cluster includes a plurality of battery packs 311, and the liquid cooling module 40 includes a main pipeline 41 and at least two branch pipelines 43, and one branch pipeline 43 corresponds to the plurality of battery packs 311 of a battery cluster connected in series, and at least two branch pipelines 43 are arranged in parallel and connected to the main pipeline 41.

In this embodiment, the main pipeline 41 includes a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe extend from the liquid cooling bin 115 into the energy storage bin 113. The branch pipeline 43 connects multiple liquid cooling channels in the battery cluster in series, one end of which is connected to the water inlet pipe and the other end is connected to the water outlet pipe. A branch pipeline 43 is set corresponding to one battery cluster.

Optionally, a liquid cooling channel for exchanging heat with heat-generating modules such as batteries is provided in the battery pack 311 , and the branch pipeline 43 includes multiple pipeline sections, which connect the liquid cooling channels in series to form a complete passage.

Of course, the liquid cooling module 40 also includes a water pump and a refrigeration component. The water pump, the main line 41, the branch line 43, the refrigeration component and the water outlet pipe constitute a cooling circulation passage. The water pump is used to provide power for the coolant in the passage, and the refrigeration component is used to exchange heat with the coolant and cool it down.

Furthermore, a water receiving tray is provided at the bottom of the installation space, and the water receiving tray is provided with a water receiving trough, and the leaked coolant is collected in the water receiving trough. The shape of the water receiving trough is not limited, but it roughly covers the bottom of the entire installation space. A connecting port is provided on the bottom wall of the water receiving trough, and the connecting port is used to connect the water receiving trough with the outside world. The connecting port is normally closed to meet the airtight requirements, and the liquid in the water receiving trough can be discharged by opening the connecting port.

Optionally, the connection port can be opened and closed by a plug switch therein.

6 and 7 , in one embodiment, the installation space includes an additional bin 111, an energy storage bin 113 and a liquid cooling bin 115, the additional module 20 is arranged in the additional bin 111, the energy storage bin 113 is arranged on one side of the additional bin 111, the power storage module 30 is arranged in the energy storage bin 113, the liquid cooling bin 115 is arranged on one side of the additional bin 111 and the energy storage bin 113, and the liquid cooling module 40 is arranged in the liquid cooling bin 115; wherein, the energy storage bin 113 is arranged in a sealed manner.

In this embodiment, the energy storage bin 113 is sealed to prevent foreign particles from entering the energy storage bin 113 and affecting the normal operation of the internal energy storage module and other equipment, and to ensure the safety of the equipment. In addition, the sealed energy storage bin 113 avoids convection with the outside world, which is conducive to better maintaining temperature and heat dissipation.

It can be understood that the water inlet pipe, the water outlet pipe and the connection terminals between the power storage module 30 and the supplementary module 20 are all sealed to ensure the closed environment of the energy storage bin 113.

In one embodiment, at least two sides of the cabinet 10 are provided with a first connecting hole 111a connected to the supplementary bin 111, and a first air duct arranged in the supplementary bin 111 is formed between the first connecting holes 111a on at least two sides. A first fan is arranged in the supplementary bin 111, and the first fan and the supplementary module 20 are arranged in the first air duct in sequence.

At least two sides of the cabinet 10 are also provided with second connecting holes 115a connected to the liquid cooling warehouse 115, and a second air duct arranged in the liquid cooling warehouse 115 is formed between the second connecting holes 115a on at least two sides. A second fan is arranged in the liquid cooling warehouse 115, and the second fan and the liquid cooling module 40 are arranged in the second air duct in sequence.

In this embodiment, the front side, top and back plate of the cabinet 10 are all provided with first connecting holes 111a, forming a first air duct with air inlet at the front and air outlet at the back and top. In order to form air convection inside and outside the supplementary compartment 111, a first fan is provided at the first connecting hole 111a on the top and/or back plate.

Similarly, the front side, right side and back plate of the cabinet 10 are all provided with second connecting holes 115a, forming a second air duct with air inlet from the front and air outlet from the right side and back side. In order to form air convection inside and outside the liquid cooling compartment 115, a second fan is provided at the second connecting hole 115a on the right side and/or back plate.

Optionally, multiple first connecting holes 111a and multiple second connecting holes 115a are arranged in a region on the cabinet, and each first connecting hole 111a and second connecting hole 115a has a smaller aperture to prevent larger foreign objects from entering the supplementary bin 111 and the liquid cooling bin 115 and affecting the normal operation of the equipment.

The first communicating hole 111 a and the second communicating hole 115 a may be square holes, circular holes, etc., which are not limited here.

Of course, in other embodiments of the present application, the first air duct can also be designed to have air intake from the front and upper sides and air outlet from the rear side; the second air duct can also have air intake from the front and right sides and air outlet from the rear side, and so on.

2 and 3 , in one embodiment, the bottom wall of the supplementary bin 111 is tilted, and the cabinet 10 is provided with a first drainage hole 111 b communicating with the supplementary bin 111 , so that water entering the supplementary bin 111 can be discharged from the first drainage hole 111 b .

The so-called inclined setting means that the plane where the bottom wall is located is set at an angle to the horizontal plane. The water hole 111b is disposed on the side with a lower height.

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 drainage hole 111b is provided on the back plate. A first connecting hole 111a is provided on the top of the cabinet 10, and rainwater can easily enter the supplementary bin 111 through the first connecting hole 111a. The inclined bottom wall can allow water to move along the bottom wall to the first drainage hole 111b for discharge, thereby avoiding water accumulation and ensuring the safety of the equipment.

Furthermore, the bottom wall of the liquid cooling bin 115 is tilted, and the cabinet 10 is provided with a second drainage hole 115b connected to the liquid cooling bin 115. The condensed water and/or cooling liquid in the liquid cooling bin 115 moves along the bottom wall and is discharged from the second drainage hole 115b.

Optionally, the bottom wall of the supplementary chamber 111 and the bottom wall of the liquid cooling chamber 115 are provided with guide grooves extending forward and backward to guide water droplets or water flows.

Optionally, the first drainage hole 111b and the second drainage hole 115b are bar-shaped through holes.

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

Referring to Figures 1, 5 and 6, in one embodiment, the supplementary electrical cabinet 100 also includes a fire protection module 60, which includes a detection unit 61 and a fire protection unit. The detection unit 61 is arranged in the energy storage bin 113. The detection unit 61 includes at least one of a temperature detector, a smoke detector and a combustible gas detector. The fire protection unit includes a ventilation component 63 and a fire protection component. The ventilation component 63 and the fire protection component are both arranged in the energy storage bin 113. The ventilation component 63 can connect the outside world and the energy storage bin 113 to form air convection, and the fire protection component is used for fire extinguishing.

In this embodiment, the detection units 61 such as temperature detectors, smoke detectors and combustible gas detectors are used to detect the inside of the cabinet to ensure timely feedback and response when danger occurs.

For example, when the combustible gas detector detects that the combustible gas concentration in the energy storage bin 113 reaches a certain limit, the ventilation component 63 operates. The ventilation component 63 includes an air inlet device 631 and an air outlet device 633, so that the air inside and outside the energy storage bin 113 forms convection, quickly reducing the combustible gas concentration in the energy storage bin 113 and avoiding safety hazards.

When a fire occurs in the energy storage bin 113, the fire prevention assembly is activated. The fire prevention assembly includes a gas firefighting assembly 65 and/or a water firefighting assembly 67. The gas firefighting assembly 65 can extinguish fires by means including but not limited to aerosols; the water firefighting assembly 67 includes a firefighting hose and a firefighting nozzle. One end of the firefighting hose is connected to an external water storage device, and the other end is connected to a firefighting nozzle. The firefighting nozzle is used to extinguish fires by spraying water. The gas firefighting assembly 65 and the water firefighting assembly 67 can act separately or simultaneously.

The above-mentioned detection units 61 such as temperature detectors, smoke detectors and combustible gas detectors, as well as ventilation components 63 and fire protection components can be matched in quantity and position according to the actual needs of the customer's location. The positions 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 the door panel 13.

1 and 6 , in one embodiment, the supplementary electrical cabinet 100 further includes a control module 50, and a control compartment 117 is further provided in the installation space. The control compartment 117 is provided below the liquid cooling compartment 115 and is located on one side of the energy storage compartment 113. The control module 50 is provided in the control compartment 117 and is electrically connected to the liquid cooling module 40, the energy storage module and the supplementary module 20; wherein the control compartment 117 is connected to the energy storage compartment 113, and the control compartment 117 and the energy storage compartment 113 are sealed.

In this embodiment, the control module 50 includes a switch confluence unit, an indication unit and an emergency stop unit. The switch confluence unit is used for circuit confluence, switch and BMU system control. The switch confluence unit is placed in the control compartment 117, which is more convenient for maintenance operations and can meet the various needs of the side outlet, bottom outlet and front outlet of the supplementary electric cabinet 100. The indication unit is an indicator light 51, which is used to timely feedback the system operation status. The emergency stop unit is an emergency stop button 53 placed on the cabinet 10. Pressing the emergency stop button 53 can realize a quick emergency stop of the operation of the supplementary electric cabinet 100.

6 and 7 , in this embodiment, the supplementary compartment 111 is located directly above the energy storage compartment 113 , the liquid cooling compartment 115 is placed on the upper right side of the cabinet 10 , and the control compartment 117 is placed on the lower right side of the cabinet 10 . The overall layout is neat and beautiful, and is convenient for water routing, wiring and fire fighting arrangements.

The control compartment 117 and the energy storage compartment 113 are sealed, and the control compartment 117 is connected to the energy storage compartment 113 , so that excess cold air in the energy storage compartment 113 flows to the control compartment 117 and dissipates heat for the control module 50 .

The liquid cooling compartment 115 and the control compartment 117 are fully welded and divided into compartments to prevent the liquid in the liquid cooling compartment 115 from entering the control compartment 117 , thereby meeting the protection and anti-corrosion requirements and protecting the control module 50 .

It can be understood that each of the above-mentioned compartments is provided with a through hole for connecting wires or pipes, the through holes are all designed to be sealed, and the wiring terminals used for connection are waterproof terminals.

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 is provided with a supplementary compartment 111, an energy storage compartment 113, a liquid cooling compartment 115 and a control compartment 117 with one side opening, and the openings of the supplementary compartment 111, the energy storage compartment 113, the liquid cooling compartment 115 and the control compartment 117 are all provided with sealing rings 119; at least one door panel 13 blocks the openings of the supplementary compartment 111 and the energy storage compartment 113, at least one door panel 13 blocks the openings of the liquid cooling compartment 115 and the control compartment 117, and the door panels 13 The sealing ring 119 is pressed.

In this embodiment, one end of the door panel 13 is hinged to the cabinet body 10. When the door panel 13 is closed, the surface of the door panel 13 presses against the sealing ring 119, thereby achieving sealing of the corresponding chamber.

The supplementary compartment 111 and the energy storage compartment 113, the liquid cooling compartment 115 and the control compartment 117 all adopt the design scheme of a common door panel 13, that is, the supplementary compartment 111 and the energy storage compartment 113, or the liquid cooling compartment 115 and the control compartment 117 are blocked at the same time by one door panel 13. Referring to Figure 6, since a sealing ring 119 is provided at the opening of each compartment, the upper and lower compartments are fully isolated by two layers of sealing rings 119, so that the upper and lower compartments do not interfere with each other and are not connected. In this way, the requirements of two protection levels can be met by one door panel 13. For example, the supplementary compartment 111 and the liquid cooling compartment 115 located above the cabinet 10 need to meet the protection requirements of IP20, while the energy storage compartment 113 and the control compartment 117 below meet the protection requirements of IP54.

1 and 4 , in one embodiment, the supplementary electric cabinet 100 further includes a top cover 70 and a base 80 . The top cover 70 is detachably disposed on the top of the cabinet body 10 , and the base 80 is detachably disposed on the bottom of the cabinet body 10 .

In this embodiment, the top cover 70, the base 80 and the cabinet body 10 can be processed, formed, and painted separately before being assembled. This can satisfy the unique processing requirements of each part on the one hand, and reduce the weight of the frame on the other hand, making processing and production more convenient.

Optionally, the top cover 70, the base 80 and the cabinet body 10 may be installed and fixed by fasteners or by welding.

In one embodiment, the top cover 70 includes a top corner piece 71 and a cabinet fixing piece 73. The top corner piece 71 can meet the requirements of bare machine hoisting on the top of the cabinet 10 and the fixing of the whole machine during transportation, and the cabinet fixing piece 73 is used to connect the cabinets 10 of other adjacent additional electric cabinets 100 in a back-to-back layout. The base 80 includes a forklift hole 81, a bottom hanging corner piece 83, a bottom grounding point 85, and a bottom fixing piece 87, which facilitates the transportation and fixing of the cabinet 10. The base 80 can realize fast front, bottom or side wiring with other equipment.

The present application also proposes an energy storage power station, which includes an energy storage converter and an additional power cabinet 100. The specific structure of the additional power cabinet 100 refers to the above embodiment, and the DCDC converter is electrically connected to the energy storage converter. Since the energy storage power station adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made using the contents of the description and drawings of this application, or direct/indirect applications in other related technical fields under the inventive concept of this application are included in the patent protection scope of this application.

Claims

An additional power cabinet is applied to an energy storage power station, characterized in that the additional power cabinet comprises:

A cabinet body, wherein the cabinet body is provided with an installation space;

A power storage module, wherein the power storage module is disposed in the installation space; and

The supplementary module is arranged in the installation space, and the supplementary module is provided with a DCDC converter, the DCDC converter is electrically connected to the power storage module, and the DCDC converter is used to be electrically connected to the energy storage converter of the energy storage power station.
The supplementary electric cabinet as described in claim 1 is characterized in that the supplementary electric cabinet also includes a liquid cooling module, the liquid cooling module is arranged in the installation space, and the liquid cooling module is connected to the power storage module.
The supplementary electric cabinet according to claim 2, characterized in that the installation space includes:

A supplementary warehouse, wherein the supplementary module is arranged in the supplementary warehouse;

An energy storage bin, wherein the energy storage bin is disposed on one side of the supplementary bin, and the power storage module is disposed in the energy storage bin; and

A liquid cooling warehouse, the liquid cooling warehouse is arranged on one side of the supplementary warehouse and the energy storage warehouse, and the liquid cooling module is arranged in the liquid cooling warehouse;

Wherein, the energy storage bin is sealed.
The supplementary electric cabinet according to claim 3 is characterized in that at least two sides of the cabinet body are provided with first connecting holes connected to the supplementary bin, a first air duct arranged in the supplementary bin is formed between the first connecting holes on at least two sides, a first fan is arranged in the supplementary bin, and the first fan and the supplementary module are arranged in the first air duct in sequence;

At least two sides of the cabinet are further provided with second connecting holes connected to the liquid cooling warehouse, and a second air duct arranged in the liquid cooling warehouse is formed between the second connecting holes on at least two sides. A second fan is arranged in the liquid cooling warehouse, and the second fan and the liquid cooling module are sequentially arranged in the second air duct.
The supplementary electric cabinet according to claim 4, characterized in that the bottom wall of the supplementary compartment The cabinet is tilted and provided with a first drainage hole connected to the supplementary bin, so that water entering the supplementary bin can be discharged from the first drainage hole;

And/or, the bottom wall of the liquid cooling bin is tilted, and the cabinet is provided with a second drainage hole connected to the liquid cooling bin, so that water entering the liquid cooling bin can be discharged from the second drainage hole.
The supplementary electric cabinet according to claim 3 is characterized in that the power storage module includes at least two battery clusters, at least two of the battery clusters are arranged in parallel in the energy storage bin, and the supplementary module includes at least two DCDC converters, one of the DCDC converters is electrically connected to one of the battery clusters;

Each of the battery clusters includes a plurality of battery packs, and the liquid cooling module includes a main pipeline and at least two branch pipelines, one branch pipeline corresponds to a plurality of battery packs of the battery cluster connected in series, and at least two branch pipelines are arranged in parallel and connected to the main pipeline.
The supplementary electric cabinet according to claim 3, characterized in that the supplementary electric cabinet further comprises a fire protection module, and the fire protection module comprises:

A detection unit, the detection unit is arranged in the energy storage bin, the detection unit includes at least one of a temperature detector, a smoke detector and a combustible gas detector; and

The fire fighting unit includes a ventilation component and a fire protection component. Both the ventilation component and the fire protection component are arranged in the energy storage bin. The ventilation component can connect the outside world and the energy storage bin to form air convection. The fire protection component is used for fire extinguishing.
The supplementary electric cabinet according to claim 3 is characterized in that the supplementary electric cabinet further comprises a control module, a control compartment is further provided in the installation space, the control compartment is provided below the liquid cooling compartment and is located on one side of the energy storage compartment, the control module is provided in the control compartment and is electrically connected to the liquid cooling module, the energy storage module and the supplementary module;

Wherein, the control compartment is connected to the energy storage compartment, and the control compartment and the energy storage compartment are sealed.
The supplementary electric cabinet according to claim 8, characterized in that the cabinet body comprises:

The cabinet body is provided with the supplementary bin with one side opening, the energy storage bin, the The openings of the liquid cooling compartment and the control compartment, the supplementary compartment, the energy storage compartment, the liquid cooling compartment and the control compartment are all provided with sealing rings; and

At least two door panels, at least one of which blocks the openings of the supplementary compartment and the energy storage compartment, and at least one of which blocks the openings of the liquid cooling compartment and the control compartment, and the door panels press against the sealing ring.
The supplementary electric cabinet according to claim 1, characterized in that the supplementary electric cabinet further comprises a top cover and a base, the top cover is detachably arranged on the top of the cabinet body, and the base is detachably arranged on the bottom of the cabinet body;

And/or, a water receiving tray is provided at the bottom of the installation space, the water receiving tray is provided with a water receiving trough, the bottom wall of the water receiving trough is provided with a connecting port, and the connecting port is used to connect the water receiving trough with the outside.
An energy storage power station, characterized in that the energy storage power station comprises:

Energy storage converters; and

According to any one of claims 1 to 10, the DCDC converter is electrically connected to the energy storage inverter.