Energy storage power plant system

Abstract

This invention provides an energy storage power station system, belonging to the field of power facility technology. It includes energy storage equipment and a transformer. The energy storage equipment comprises two energy storage battery units arranged side-by-side along a second direction. Each energy storage battery unit has a first air inlet facing a first direction and a first air outlet facing the top. The transformer is positioned opposite the energy storage equipment along the second direction and spaced apart. The transformer has a second air inlet and a second air outlet facing the second direction, with the second air outlet located above the second air inlet and tilted upwards. This invention, through the rational design of the positions of the first air inlet, first air outlet, second air inlet, and second air outlet, and by arranging the energy storage equipment and transformer equipment opposite each other and spaced apart along the second direction, effectively avoids mutual interference of airflow between equipment, optimizes airflow organization, and improves heat dissipation efficiency while optimizing the overall footprint of the energy storage power station system.

Description

Technical Field

[0001] This utility model belongs to the field of power facility technology, and more specifically, relates to an energy storage power station system. Background Technology

[0002] An energy storage power station generally includes energy storage equipment and power distribution equipment. The energy storage equipment is used to house battery modules, cooling units and related power distribution devices, while the power distribution equipment is used to house converters and transformers. The energy storage equipment and power distribution equipment are used together to form an energy storage power station system.

[0003] Energy storage power station systems need to provide maximum energy storage capacity within limited site space, so the distance between various devices should be as small as possible. However, maintenance of energy storage devices and power transmission equipment requires reserved space, and space for air intake and exhaust is also needed between devices for heat dissipation. Therefore, the distance between devices must meet the corresponding requirements.

[0004] Because energy storage power station systems have numerous devices, airflow between these devices can interfere with each other, causing temperature rise and fall. To avoid this problem, the usual method is to increase the distance between devices. However, this results in a large overall footprint for the energy storage power station, long and messy connecting cables, high losses, and high costs. Utility Model Content

[0005] The purpose of this utility model is to provide an energy storage power station system that aims to solve the technical problems of mutual interference in airflow organization between equipment and large footprint in existing energy storage power stations.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an energy storage power station system, comprising:

[0007] An energy storage device includes two energy storage battery units arranged side by side along a second direction. Each energy storage battery unit has a first air inlet facing a first direction and a first air outlet facing the top. The vertical center line of the side-by-side surfaces of the two energy storage battery units is defined as a first reference line, and the two energy storage battery units are arranged in a centrally symmetrical manner with respect to the first reference line. The second direction is the front-back direction of the energy storage battery units, and the first direction is the left-right direction of the energy storage battery units.

[0008] The power equipment is positioned opposite and spaced apart from the energy storage device along the second direction, and is electrically connected to the energy storage device; the power equipment has a second air inlet and a second air outlet facing the second direction, the second air outlet being located above the second air inlet and tilted upward.

[0009] In one possible implementation, a group of the energy storage devices and a transformer device form a first energy storage subunit; the first energy storage subunit has multiple groups and is distributed in a rectangular array.

[0010] In one possible implementation, a group of the energy storage devices and a transformer device form a first energy storage subunit; the first energy storage subunit has multiple groups, wherein in the multiple first energy storage subunits located in the same column, each pair of adjacent first energy storage subunits is symmetrically distributed along the first direction, and in the multiple first energy storage subunits located in the same row, each pair of adjacent first energy storage subunits is symmetrically distributed along the second direction.

[0011] In one possible implementation, two energy storage battery units in each group of the first energy storage sub-units are electrically connected to the power equipment via a first DC line group; multiple power equipment units located in the same column are connected via a first AC line group; the first DC line group and the first AC line group are respectively extended along the second direction.

[0012] In some embodiments, the first AC line group is located on one side of the first energy storage sub-unit, and the first DC line group is located on the other side of the first energy storage sub-unit.

[0013] In one possible implementation, the energy storage devices are arranged in two groups and are distributed facing each other along the second direction; the power transmission equipment is located between the two groups of energy storage devices.

[0014] The two sets of energy storage devices and one of the transformer devices form a second energy storage sub-unit, and the energy storage power station system has at least one set of the second energy storage sub-unit.

[0015] In some embodiments, the second energy storage subunit is in two groups, and the two transformer devices in the two groups of the second energy storage subunit are facing each other and spaced apart along the first direction;

[0016] Two sets of the second energy storage sub-units form a second energy storage unit; the second energy storage unit has multiple sets and is distributed in a rectangular array.

[0017] In some embodiments, the four energy storage battery packs in each group of the second energy storage sub-units are electrically connected to the power equipment via a second DC line group, and the two power equipment in the second energy storage unit are electrically connected via a second AC line group.

[0018] The second DC line group and the second AC line group are respectively extended and laid out along the second direction.

[0019] In some embodiments, in a group of second energy storage units, the second AC line group is located between two groups of second energy storage sub-units; the second DC line group is located on the side of the corresponding second energy storage sub-unit away from the second AC line group.

[0020] In one possible implementation, the energy storage battery pack includes:

[0021] Battery module; and

[0022] A cooling unit is arranged side by side with the battery module along the first direction; the cooling unit has a first air inlet and a first air outlet.

[0023] The beneficial effects of the energy storage power station system provided by this utility model are as follows: the energy storage equipment and the power transformer are arranged facing each other and spaced apart along the second direction, the energy storage equipment and the power transformer do not have an interlaced layout, and the energy storage equipment includes two parallel energy storage battery units, which can reduce the overall footprint of the energy storage power station system and optimize the internal wiring layout.

[0024] The energy storage battery unit takes in cold air along the first direction, and the power equipment takes in cold air along the second direction. The air intake paths of the two do not overlap to ensure sufficient air intake for both the energy storage and power equipment. The energy storage battery unit discharges hot air to the top, and the power equipment discharges hot air upwards at an angle along the second direction. The first and second air outlets do not overlap, so there will be no airflow disorder caused by hot air blowing against each other, thus avoiding mutual interference between the energy storage and power equipment.

[0025] The energy storage battery unit takes in cold air along the first direction and exits hot air from the top. Its cold air intake channel and hot air outlet channel do not overlap. The second air outlet of the power equipment is located above the second air inlet and is tilted upward. Its cold air intake channel and hot air outlet channel also do not overlap. This can prevent hot air from mixing into the cold air intake channel and affecting heat dissipation, and ensure the orderly flow of cold and hot air.

[0026] Compared with existing technologies, the energy storage power station system of this utility model, by rationally designing the positions of the first air inlet, the first air outlet, the second air inlet and the second air outlet, and by arranging the energy storage equipment and the power equipment to be aligned and spaced apart along the second direction, effectively avoids mutual interference of airflow between equipment, optimizes airflow organization and improves heat dissipation efficiency while optimizing the overall footprint of the energy storage power station system. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an energy storage power station system provided in an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the energy storage power station system provided in the first embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of an energy storage power station system provided in the second embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the structure of the energy storage power station system provided in the third embodiment of this utility model;

[0032] Figure 5 for Figure 4 A schematic diagram of the structure of the second energy storage unit in the diagram;

[0033] Figure 6 A schematic diagram of the structure of the energy storage device provided in the embodiment of this utility model;

[0034] Figure 7 This is a schematic diagram of the structure of the power equipment provided in an embodiment of the present utility model.

[0035] In the picture:

[0036] 1. Energy storage battery unit; 11. First air inlet; 12. First air outlet; 13. Battery module; 14. Cooling unit;

[0037] 2. Power equipment; 21. Second air inlet; 22. Second air outlet;

[0038] 31. First energy storage subunit; 32. First DC line group; 33. First AC line group;

[0039] 4. Second energy storage unit; 41. Second energy storage subunit; 42. Second DC line group; 43. Second AC line group. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0041] Please refer to the following: Figures 1 to 7 The energy storage power station system provided by this utility model will now be described. The energy storage power station system includes an energy storage device and a transformer device 2. The energy storage device includes two energy storage battery units 1 arranged side-by-side along a second direction. Each energy storage battery unit 1 has a first air inlet 11 facing a first direction and a first air outlet 12 facing the top, as shown below. Figure 6 As shown; the vertical center line of the side-by-side surfaces of the two energy storage battery units 1 is defined as the first reference line, and the two energy storage battery units 1 are arranged symmetrically with respect to the first reference line; wherein, the second direction is the front-to-back direction of the energy storage battery units 1, and the first direction is the left-to-right direction of the energy storage battery units 1; the transformer equipment 2 is arranged opposite to and spaced apart from the energy storage equipment along the second direction, and is electrically connected to the energy storage equipment; the transformer equipment 2 has a second air inlet 21 and a second air outlet 22 facing the second direction, the second air outlet 22 is located above the second air inlet 21, and the second air outlet 22 is inclined upward, as shown. Figure 7 As shown.

[0042] It should be noted that the orientations or positional relationships indicated by "front," "rear," "left," and "right" in this embodiment are based on the orientation of the energy storage device and the power transformer 2 themselves. Both the energy storage device and the power transformer 2 are cuboid structures, with the front of the device facing "front," the back of the device facing "rear," and the two sides of the device facing "left" and "right," respectively. Therefore, the front-back direction, i.e., the second direction, defined in this embodiment refers to the direction between the front and back of the device (i.e., the direction perpendicular to the front and back), and the left-right direction, i.e., the first direction, refers to the direction between the two sides of the device (i.e., the direction perpendicular to the two sides).

[0043] Figures 2 to 4 The diagram shows three layout structures for the energy storage power station system. The arrows in the diagram indicate the direction of airflow. Specifically, the arrows pointing towards the generator are the air intake direction, and the arrows pointing away from the generator are the air outlet direction.

[0044] Reference Figure 6 The energy storage battery unit 1 has a first air inlet 11 on its side and a first air outlet 12 on its top surface. Cold air enters from the side and hot air exits from the top. (Refer to...) Figure 7The transformer equipment 2 has a second air inlet 21 and a second air outlet 22 on its front and back sides, respectively. The second air outlet 22 is located above the second air inlet 21, and the air outlet direction of the second air outlet 22 is obliquely upward, so it will not interfere with the air intake path of the second air inlet 21.

[0045] The energy storage device is used to install energy storage batteries and provide energy storage power; the transformer 2 is used to convert the DC power output by the energy storage device into AC power and boost the voltage; it should be noted that the energy storage device and the transformer 2 are connected by DC line groups, and multiple transformers 2 are connected by AC line groups.

[0046] The energy storage power station system provided by this utility model has energy storage equipment and power conversion equipment 2 facing each other and spaced apart along the second direction. There is no staggered layout between the energy storage equipment and the power conversion equipment. The energy storage equipment includes two parallel energy storage battery units 1, which can reduce the overall footprint of the energy storage power station system and optimize the internal wiring layout.

[0047] The energy storage battery unit 1 takes in cold air along the first direction, and the power equipment 2 takes in cold air along the second direction. The air intake paths of the two do not overlap to ensure sufficient air intake for both the energy storage equipment and the power equipment 2. The energy storage battery unit 1 discharges hot air to the top, and the power equipment 2 discharges hot air upward at an angle along the second direction. The first air outlet 12 and the second air outlet 22 do not overlap, so there will be no airflow disorder caused by hot air blowing against each other, thereby avoiding mutual interference between the energy storage equipment and the power equipment 2.

[0048] The two sets of energy storage battery units 1 are arranged in a centrally symmetrical layout, making the two sets of energy storage battery units 1 have the same structure and the same position, which facilitates unified management and maintenance by operation and maintenance personnel.

[0049] The energy storage battery unit 1 takes in cold air along the first direction and exits hot air from the top. Its cold air intake channel and hot air outlet channel do not overlap. The second air outlet 22 of the power equipment 2 is located above the second air inlet 21 and is tilted upward. Its cold air intake channel and hot air outlet channel also do not overlap. This can prevent hot air from mixing into the cold air intake channel and affecting heat dissipation, thus ensuring the orderly flow of cold and hot air.

[0050] Compared with the prior art, the energy storage power station system of this utility model, by rationally designing the positions of the first air inlet 11, the first air outlet 12, the second air inlet 21 and the second air outlet 22, and by arranging the energy storage equipment and the power equipment 2 to be aligned and spaced apart along the second direction, effectively avoids mutual interference of airflow between equipment, optimizes airflow organization and improves heat dissipation efficiency while optimizing the overall footprint of the energy storage power station system.

[0051] Specifically, the energy storage equipment and the power transmission equipment 2 are arranged facing each other and spaced apart along the second direction. This compact layout reduces redundant space between the equipment, improves space utilization, and reduces the overall footprint of the energy storage power station.

[0052] Because of the compact layout between the energy storage equipment and the power transmission equipment 2, the physical distance between the equipment is shortened, and the length of the connecting cables is also reduced, which reduces cable loss, material usage, and construction difficulty, thereby reducing the construction and operation costs of the energy storage power station.

[0053] Specifically, one power distribution unit 2 can correspond to one energy storage battery unit 1, or as shown in this embodiment, it can correspond to two energy storage battery units 1. A single power distribution unit 2 serves two energy storage battery units 1 simultaneously, which optimizes system resource allocation, reduces redundant equipment, improves the utilization rate of power distribution unit 2, reduces the spacing requirements between equipment, and makes the overall layout more compact.

[0054] The two sets of energy storage battery units 1 of the energy storage device are closely arranged, with no gap or a very small gap between their side-by-side surfaces. It should be noted that the first reference line is a dummy line, and the limitation of the first reference line is only to illustrate the positional layout of the two energy storage battery units 1.

[0055] The two energy storage battery units 1 are arranged in a centrally symmetrical layout, ensuring that their structures are identical and their locations are consistent, facilitating unified management and maintenance by operation and maintenance personnel. For example, inspection and maintenance work can be standardized based on symmetry, reducing maintenance time and costs. The symmetrical layout also meets the requirements of engineering design standards and aesthetics, making the overall layout of the energy storage power station more neat and coordinated, while also facilitating construction and installation. Furthermore, for manufacturers of energy storage battery units, there is no need to produce mirror images of this layout (similar to the difference between left-hand drive and right-hand drive cars), simplifying manufacturing costs.

[0056] Furthermore, the centrally symmetrical layout makes the airflow path more regular and symmetrical, simplifying the design of airflow organization. Designers can plan the position of the first air inlet 11 uniformly based on symmetry, reducing airflow interference and making the airflow distribution of the energy storage battery unit 1 more uniform, avoiding local airflow accumulation or insufficiency. This helps to achieve a more balanced heat dissipation effect, ensuring that each energy storage battery unit 1 receives sufficient airflow cooling, thereby reducing the overall temperature rise.

[0057] Furthermore, the symmetrical layout makes the arrangement of the energy storage battery units 1 more compact and orderly, avoiding redundant space occupation that may be caused by the asymmetrical layout, thereby improving the space utilization rate of the energy storage power station.

[0058] Specifically, the power equipment 2 includes a step-up transformer module and an energy storage inverter module. The energy storage battery unit 1 stores direct current (DC), while the power grid and most electrical devices use alternating current (AC). The main function of the energy storage inverter module is to convert the DC output from the energy storage battery into AC to meet the needs of the power grid or load. When the energy storage power station system is charging, the energy storage inverter module can also convert the AC power from the power grid into DC to charge the energy storage battery unit 1. Therefore, the energy storage inverter module can realize bidirectional flow of electrical energy, ensuring that the energy storage power station system can both discharge to supply power and charge to store energy.

[0059] Energy storage inverter modules typically output lower AC voltages (e.g., 400V or 690V), while the grid's transmission voltage is higher (e.g., 10kV, 35kV, or higher). The main function of a step-up transformer module is to increase the low voltage output from the energy storage inverter module to the voltage level required by the grid, and to transmit the boosted power to the grid or distant loads, ensuring efficient and stable power delivery.

[0060] Both the energy storage inverter module and the converter boost module can adopt common structures in the existing technology. This embodiment does not limit the specific structure of the energy storage inverter module and the converter boost module, as long as the power equipment composed of the two has a second air inlet 21 and a second air outlet 22 along the second direction.

[0061] In some embodiments, the above-mentioned energy storage battery unit 1 can adopt the following... Figure 6 The structure shown is described in the following document. Figure 6 The energy storage battery unit 1 includes a battery module 13 and a cooling unit 14; the cooling unit 14 and the battery module 13 are arranged side by side along a first direction; the cooling unit 14 has the aforementioned first air inlet 11 and first air outlet 12.

[0062] Battery module 13 is the core energy storage unit of the energy storage power station. It is charged when the grid load is low or the electricity price is low, and discharged when the load is high or the electricity price is high, realizing energy time shift. Battery module 13 works in conjunction with power transformer 2 to achieve efficient DC to AC conversion.

[0063] Battery module 13 generates a large amount of heat during charging and discharging. If this heat cannot be dissipated in time, the battery temperature will rise, affecting performance and lifespan. Cooling unit 14 is used to dissipate heat from battery module 13 to ensure that the battery temperature remains within a reasonable range. Cooling unit 14 generally uses liquid cooling or air cooling.

[0064] The cooling unit 14 dissipates the heat generated during battery charging and discharging in a timely manner through air cooling or liquid cooling, avoiding overheating of the battery which can lead to capacity decay, increased internal resistance, or even thermal runaway. This ensures uniform temperature distribution inside the battery module 13 and prevents localized overheating, thereby extending battery life.

[0065] The cooling unit 14 in this embodiment mainly adopts air cooling. Ambient cold air is introduced through the first air inlet 11, and after heat exchange with the battery pack, it is discharged from the first air outlet 12.

[0066] In some embodiments, the above-mentioned energy storage power station system may employ, for example... Figure 2 and Figure 3 The layout shown is described in the image. Figure 2 and Figure 3 A set of energy storage devices and a transformer device 2 form a first energy storage subunit 31; the energy storage power station system has multiple sets of first energy storage subunits 31.

[0067] like Figure 2 and Figure 3 As shown, the area highlighted by the dashed line and labeled with 31 is the first energy storage sub-unit 31. It should be noted that... Figure 2 and Figure 3 The dashed box in the image is only for the convenience of displaying the first energy storage sub-unit 31; the energy storage power station system does not actually have a dashed box.

[0068] A set of energy storage devices and a transformer device 2 form a first energy storage subunit 31. This modular design allows the energy storage power station system to be flexibly expanded according to needs, simply by adding the first energy storage subunit 31. Moreover, the modular design facilitates maintenance and repair. Each first energy storage subunit 31 can operate and be maintained independently, reducing system downtime and improving the overall reliability and stability of the system.

[0069] One specific implementation of the layout of the first energy storage subunit 31 is as follows: Figure 2 As shown, multiple sets of first energy storage sub-units 31 are distributed in a rectangular array.

[0070] Another specific implementation of the layout of the first energy storage subunit 31, such as Figure 3 As shown, among the multiple first energy storage sub-units 31 located in the same column, each pair of adjacent first energy storage sub-units 31 are symmetrically distributed along the first direction, and among the multiple first energy storage sub-units 31 located in the same row, each pair of adjacent first energy storage sub-units 31 are symmetrically distributed along the second direction.

[0071] Please see Figure 2 and Figure 3 Based on the two specific implementation methods described above, the two energy storage battery units 1 in each group of first energy storage sub-units 31 are electrically connected to the power equipment 2 through the first DC line group 32, which extends along the second direction; multiple power equipment 2 located in the same column are connected through the first AC line group 33; the first AC line group 33 also extends along the second direction.

[0072] According to the energy storage design requirements, the two energy storage battery units 1 are connected in series and parallel using the first DC line group 32, and then connected to the power equipment 2 using the first DC line group 32.

[0073] It should be noted that, in this embodiment, the extension of the first DC line group 32 along the second direction refers to the main circuit of the first DC line group 32 extending along the second direction. Of course, some branch lines of the first DC line group 32 may change direction to connect with the device. Similarly, the extension of the first AC line group 33 along the second direction refers to the main circuit of the first AC line group 33 extending along the second direction. Of course, some branch lines of the first AC line group 33 may change direction to connect with the device.

[0074] It should be noted that the two power equipment 2 are connected through the first AC line group 33, while the two energy storage battery units 1 of one first energy storage sub-unit 31 are not connected to the two energy storage battery units 1 of the other first energy storage sub-unit 31 by cables.

[0075] In addition, multiple power equipment 2 located in the same column are connected by the first AC line group 33. Specifically, which power equipment 2 in the same column share the same first AC line group 33 for connection depends on the design requirements.

[0076] The first DC line group 32 and the first AC line group 33 are respectively extended along the second direction, so that the electrical connection path between the energy storage battery unit 1 and the power equipment 2 is minimized, the cable layout path is neat, avoiding cable messiness and redundancy, and reducing cable length and optimizing electrical connection, thereby reducing energy loss in the DC power transmission process.

[0077] In addition, the first DC line group 32 and the first AC line group 33 are respectively extended along the second direction, making the wiring design simpler and more standardized, making it easier for construction personnel to install according to unified standards, facilitating later maintenance and repair, and reducing maintenance time and costs.

[0078] Preferably, based on the above embodiment, in a group of first energy storage units 3, the first AC line group 33 is located on one side of the first energy storage unit 3, and the first DC line group 32 is located on the other side of the first energy storage unit 3.

[0079] The first DC line group 32 and the first AC line group 33 adopt the above-described layout, which separates the wiring paths of DC and AC power, avoids electrical interference, and further improves energy transmission efficiency. Furthermore, the clear and orderly layout of the first AC line group 33 and the first DC line group 32 facilitates installation by construction personnel according to unified standards, reducing construction difficulty.

[0080] In some embodiments, the above-mentioned energy storage power station system may employ, for example... Figure 4 and Figure 5 The layout shown is described in the image. Figure 4 and Figure 5 The energy storage device is provided in two groups and is distributed facing each other along the second direction; the power equipment 2 is located between the two groups of energy storage devices; the two groups of energy storage devices and one power equipment 2 form a second energy storage sub-unit 41, and the energy storage power station system has at least one second energy storage sub-unit 41.

[0081] like Figure 4 and Figure 5 As shown, the area highlighted by the dashed line and labeled with 41 is the second energy storage sub-unit 41. It should be noted that... Figure 4 and Figure 5 The dashed box in the image is only for the convenience of displaying the second energy storage sub-unit 41; the energy storage power station system does not actually have a dashed box.

[0082] The power equipment 2 serves two sets of energy storage devices at the same time, that is, it serves four energy storage battery units 1 at the same time. The four energy storage battery units 1 are connected in series and parallel according to the energy storage design requirements, and then connected to the power equipment 2.

[0083] By placing the transformer 2 between the two sets of energy storage devices, the capacity of the energy storage devices is increased, and the space is fully utilized. The compact layout makes the overall structure of the energy storage power station more concentrated and reduces unnecessary space waste.

[0084] Two sets of energy storage devices and power transmission equipment 2 form the second energy storage subunit 41. This modular design allows the energy storage power station system to be flexibly expanded according to needs, simply by adding the second energy storage subunit 41. Moreover, the modular design facilitates maintenance and repair. Each second energy storage subunit 41 can operate and be maintained independently, reducing system downtime and improving the overall reliability and stability of the system.

[0085] Preferably, please refer to Figure 4 and Figure 5 Based on the above implementation method, the second energy storage subunit 41 consists of two groups, with two power distribution devices 2 in each group facing each other and spaced apart along the first direction; the two groups of second energy storage subunits 41 form the second energy storage unit 4. Specifically, the second energy storage unit 4 can be arranged in multiple groups and distributed in a rectangular array.

[0086] Each second energy storage unit 4 can be understood as including two second energy storage sub-units 41 spaced apart along the first direction, wherein the two power equipment 2 are connected by a second AC line group 43, and the four energy storage battery units 1 of one set of second energy storage sub-units 41 are not connected to the four energy storage battery units 1 of the other set of second energy storage sub-units 41 by cables.

[0087] By symmetrically arranging two second energy storage sub-units 41 into one second energy storage unit 4, multiple devices can be distributed in a rectangular array, with no overlapping distribution between multiple devices and no problem of excessive distance between them. This optimizes the layout of the energy storage power station system and reduces the overall footprint of the energy storage power station system.

[0088] Two sets of second energy storage sub-units 41 form the second energy storage unit 4. This modular design allows the energy storage power station system to be flexibly expanded according to needs, simply by adding the second energy storage unit 4. The newly added second energy storage unit 4 can be deployed according to the same design standards, ensuring system consistency and scalability.

[0089] Preferably, please refer to Figure 4 and Figure 5 Based on the above implementation, the four energy storage battery units 1 in each group of second energy storage sub-units 41 are electrically connected to the power equipment 2 via a second DC line group 42, which extends along a second direction. The two power equipment 2 in the second energy storage unit 4 are electrically connected via a second AC line group 43, which also extends along a second direction.

[0090] Specifically, the four energy storage battery units 1 are connected in series and parallel using the second DC line group 42 according to the energy storage design requirements, and then connected to the power equipment 2.

[0091] It should be noted that, in this embodiment, the extension of the second DC line group 42 along the second direction refers to the main circuit of the second DC line group 42 extending along the second direction. Of course, some branch lines of the second DC line group 42 may change direction to connect with the device. Similarly, the extension of the second AC line group 43 along the second direction refers to the main circuit of the second AC line group 43 extending along the second direction. Of course, some branch lines of the second AC line group 43 may change direction to connect with the device.

[0092] The second DC line group 42 and the second AC line group 43 are respectively extended along the second direction, so that the electrical connection path between the four energy storage battery units 1 and the power equipment 2 is minimized, the cable layout path is neat, avoiding cable messiness and redundancy, and reducing cable length and optimizing electrical connection, thereby reducing energy loss in the DC power transmission process.

[0093] In addition, the second DC line group 42 and the second AC line group 43 are extended along the second direction, making the wiring design simpler and more standardized, making it easier for construction personnel to install according to unified standards, facilitating later maintenance and repair, and reducing maintenance time and costs.

[0094] Preferably, please refer to Figure 4 and Figure 5Based on the above implementation, in a set of second energy storage units 4, the second AC line group 43 is located between the two sets of second energy storage sub-units 41; the second DC line group 42 is located on the side of the corresponding second energy storage sub-unit 41 away from the second AC line group 43.

[0095] The second AC line group 43 extends along the second direction and is located between the two second energy storage sub-units 41, so that the AC connection path between the two power equipment 2 is the shortest, reducing cable length and energy loss, and avoiding interference of cable layout with equipment layout.

[0096] The second DC line group 42 is located on the side of the corresponding second energy storage subunit 41 away from the second AC line group 43, which separates the wiring paths of DC and AC power, avoids electrical interference, and further improves energy transmission efficiency. Moreover, the layout paths of the second AC line group 43 and the second DC line group 42 are clear and regular, which facilitates the installation by construction personnel according to uniform standards and reduces construction difficulty.

[0097] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy storage power plant system, characterized by, include: An energy storage device includes two energy storage battery units (1) arranged side by side along a second direction. Each energy storage battery unit (1) has a first air inlet (11) facing a first direction and a first air outlet (12) facing the top. The vertical center line of the side-by-side surfaces of the two energy storage battery units (1) is defined as a first reference line. The two energy storage battery units (1) are arranged in a centrally symmetrical manner with respect to the first reference line. The second direction is the front-back direction of the energy storage battery units (1), and the first direction is the left-right direction of the energy storage battery units (1). The transformer (2) is positioned opposite and spaced apart from the energy storage device along the second direction and is electrically connected to the energy storage device; the transformer (2) has a second air inlet (21) and a second air outlet (22) facing the second direction, the second air outlet (22) is located above the second air inlet (21) and the second air outlet (22) is inclined upward.

2. The energy storage power plant system of claim 1, wherein, A group of the energy storage devices and a transformer (2) form a first energy storage subunit (31); the first energy storage subunit (31) has multiple groups and is distributed in a rectangular array.

3. The energy storage power plant system of claim 1, wherein, A group of the energy storage devices and a transformer (2) form a first energy storage subunit (31); the first energy storage subunit (31) has multiple groups, wherein in the multiple first energy storage subunits (31) located in the same column, each two adjacent first energy storage subunits (31) are symmetrically distributed along the first direction, and in the multiple first energy storage subunits (31) located in the same row, each two adjacent first energy storage subunits (31) are symmetrically distributed along the second direction.

4. The energy storage power plant system of claim 2 or 3, wherein, Two energy storage battery units (1) in each of the first energy storage sub-units (31) are electrically connected to the transformer equipment (2) via a first DC line group (32); multiple transformer equipment (2) located in the same column are connected via a first AC line group (33); the first DC line group (32) and the first AC line group (33) are respectively extended along the second direction.

5. The energy storage power plant system of claim 4, wherein, The first AC line group (33) is located on one side of the first energy storage sub-unit (31), and the first DC line group (32) is located on the other side of the first energy storage sub-unit (31).

6. The energy storage power plant system of claim 1, wherein, The energy storage device is provided in two groups and is distributed facing each other along the second direction; the power equipment (2) is located between the two groups of energy storage devices; The two sets of energy storage devices and one of the transformer devices (2) form a second energy storage subunit (41), and the energy storage power station system has at least one set of the second energy storage subunit (41).

7. The energy storage power plant system of claim 6, wherein, The second energy storage subunit (41) consists of two groups, and the two transformer devices (2) in the two groups of the second energy storage subunit (41) are arranged facing each other and spaced apart along the first direction; Two sets of the second energy storage sub-units (41) form a second energy storage unit (4); the second energy storage unit (4) has multiple sets and is distributed in a rectangular array.

8. The energy storage power plant system of claim 7, wherein, The four energy storage battery units (1) in each group of the second energy storage sub-units (41) are electrically connected to the transformer equipment (2) through the second DC line group (42), and the two transformer equipment (2) in the second energy storage unit (4) are electrically connected through the second AC line group (43). The second DC line group (42) and the second AC line group (43) are respectively extended along the second direction.

9. The energy storage power plant system of claim 8, wherein, In one group of second energy storage units (4), the second AC line group (43) is located between two groups of second energy storage sub-units (41); the second DC line group (42) is located on the side of the corresponding second energy storage sub-unit (41) away from the second AC line group (43).

10. The energy storage power plant system of claim 1, wherein, The energy storage battery unit (1) includes: Battery module (13); and A cooling unit (14) is arranged side by side with the battery module (13) along the first direction; the cooling unit (14) has a first air inlet (11) and a first air outlet (12).

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