Energy storage convergence system

Abstract

The utility model discloses an energy storage convergence system, and relates to the technical field of energy storage systems. The device comprises a main energy storage cabinet, the main energy storage cabinet internally comprises a confluence bin, and a main circuit breaker, a current transformer, a load output copper bar, an electric meter and an electric energy management system EMS are arranged in the confluence bin; and the auxiliary energy storage cabinets are connected in parallel and converged with the main energy storage cabinet, the number of the auxiliary energy storage cabinets is N, and the N auxiliary energy storage cabinets converge to the main energy storage cabinet and are connected to a load through the main energy storage cabinet. According to the utility model, the main energy storage cabinet is adopted, the confluence bin is arranged in the cabinet, the plurality of slave energy storage cabinets are confluence in parallel for capacity expansion, and the adopted slave energy storage cabinets have modular structures, so that the confluence scheme is modularized and standardized, the cost is lower, the installation is more convenient, and the integration is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage systems, and particularly relates to an energy storage busbar system. Background Art

[0002] The busbar cabinet of the energy storage system is a device for concentrating and distributing electric energy, usually used in the energy storage system. Its main function is to collect the electric energy of multiple battery packs or other power sources together and distribute it to loads or other devices.

[0003] When multiple industrial and commercial energy storage cabinets are paralleled, an additional busbar cabinet needs to be added, with a large number of cables, high costs, large floor space, and complex wiring. In the prior art, when parallel connection of energy storage cabinets is required, an additional busbar cabinet device is usually adopted, and all energy storage cabinets are converged here for busbar connection and then output to the load on the user side, as Figure 1 shown.

[0004] In the prior art, each energy storage cabinet is an independent system with many internal components. Moreover, when expanding capacity, an additional busbar device needs to be added, resulting in high material costs, complex wiring, and high time costs. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an energy storage busbar system. By setting a main energy storage cabinet with a busbar chamber inside and expanding capacity by paralleling and busbar connecting several slave energy storage cabinets, the problems that when multiple industrial and commercial energy storage cabinets are paralleled in the prior art, an additional busbar cabinet needs to be added, with a large number of cables, high costs, large floor space, and complex wiring are solved.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model is an energy storage busbar system, including a main energy storage cabinet. Inside the main energy storage cabinet, there are a main circuit breaker, a current transformer, a load output copper bar, an ammeter, and an energy management system EMS; slave energy storage cabinets connected in parallel and busbar connected to the main energy storage cabinet. There are N slave energy storage cabinets, and the N slave energy storage cabinets are busbar connected to the main energy storage cabinet and connected to the load through the main energy storage cabinet.

[0008] Furthermore, battery packs, air conditioners, fire protection devices, PCS inverters, high-voltage boxes, wiring rows, and cabinet bodies are arranged in both the main energy storage cabinet and the slave energy storage cabinets.

[0009] Furthermore, a battery cluster formed by stacking several battery packs is arranged on one side inside the cabinet body.

[0010] Furthermore, the slave energy storage cabinets are busbar connected to the wiring row of another slave energy storage cabinet or the wiring row of the main energy storage cabinet through the wiring row inside the cabinet body.

[0011] Further, the cabinet body includes an independent first space and a second space, and the battery clusters are all placed in the first space; the second space is provided with a fire protection device, a PCS converter, a high-voltage box and a bus bar.

[0012] Further, the air conditioner is located at the top of the cabinet body and is used to cool the space inside the cabinet.

[0013] Further, the second space of the main energy storage cabinet further includes a bus bar chamber.

[0014] The utility model has the following beneficial effects:

[0015] By adopting the main energy storage cabinet and arranging a bus bar chamber in the cabinet, the utility model expands the capacity by paralleling and collecting several slave energy storage cabinets. The adopted slave energy storage cabinet has a modular structure, making the bus bar scheme modular, standardized, with lower cost, more convenient installation and high integration.

[0016] Of course, any product implementing the utility model does not necessarily need to achieve all the above advantages simultaneously. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a diagram of an energy storage bus bar system in the prior art;

[0019] Figure 2 It is a diagram of an energy storage bus bar system of this embodiment;

[0020] Figure 3 It is the front view of the structure of the main energy storage cabinet of this embodiment;

[0021] Figure 4 It is the right view of the structure of the main energy storage cabinet of this embodiment;

[0022] Figure 5 It is the front view of the structure of the slave energy storage cabinet of this embodiment;

[0023] Figure 6 It is the right view of the structure of the slave energy storage cabinet of this embodiment;

[0024] Figure 7 It is the diagram of the power management system of this embodiment;

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1 - Cabinet, 2 - Battery pack, 3 - PCS inverter, 4 - Electric meter, 5 - Wiring row, 6 - Fire protection, 7 - Busbar chamber, 8 - Main circuit breaker, 9 - Load output copper bar, 10 - Current transformer, 11 - Air conditioner, 12 - High - voltage box, 101 - First space, 102 - Second space, 103 - Louver, 104 - Storage slot. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] The integrated energy storage cabinet mainly consists of a cabinet body, a liquid - cooling unit, a PCS energy storage inverter, a battery pack, an EMS energy management system, an energy storage high - voltage box, a fire protection system, a safety auxiliary system, etc. Among them, the EMS energy management system is the basis for the safe, stable and economic operation of the energy storage cabinet. Therefore, it is necessary to deploy an energy storage EMS energy management system in the energy storage cabinet to achieve panoramic monitoring, status analysis and optimal control of the energy storage cabinet.

[0029] As Figure 7 shown, the EMS (Energy Management System) system, that is, the electric energy management system. EMS is a set of electric energy management systems developed for low - voltage distribution systems according to user needs, following the standard specifications of the distribution system, with characteristics such as strong professionalism, high automation, easy use, high performance, and high reliability.

[0030] For example, the energy storage energy management system with the model number Acrel - 2000ES has perfect energy storage monitoring and management functions, covering detailed information of energy storage system equipment (PCS, BMS, electric meter, fire protection, air conditioner, etc.), and realizing functions such as data acquisition, data processing, data storage, data query and analysis, visual monitoring, alarm management, statistical reports, etc. In advanced applications, it supports energy scheduling and has control functions such as planned curve, peak shaving and valley filling, demand control, standby power supply, etc. The system monitors the performance of the battery pack in real - time and analyzes historical data, and adopts an intelligent allocation strategy to control the charging and discharging of the battery pack according to the analysis results, optimizing the battery performance and extending the battery life.

[0031] The electric energy management system supports the Windows operating system, and the database uses SQL Server. This system can be used not only for integrated energy storage cabinets but also for energy storage containers, and is a software system platform specifically for energy storage device management.

[0032] The PCS (Power Conversion System) can control the charging and discharging processes of the battery, perform AC-DC conversion, and directly supply power to AC loads in the absence of a power grid. The PCS consists of a DC / AC bidirectional converter, a control unit, etc. The PCS controller receives the background control instructions through communication, controls the converter to charge or discharge the battery according to the sign and magnitude of the power instruction, and realizes the regulation of the active power and reactive power of the power grid. The PCS controller communicates with the BMS through the CAN interface, obtains the state information of the battery pack, and can realize the protective charging and discharging of the battery to ensure the safe operation of the battery.

[0033] As Figure 2 shown, this embodiment is an energy storage busbar system, including a main energy storage cabinet and slave energy storage cabinets. The main energy storage cabinet and the slave energy storage cabinets are both equipped with battery packs 2, air conditioners 11, fire protection devices 6, PCS converters 3, high-voltage boxes 12, busbars 5, and cabinets 1. Several battery packs 2 are stacked to form a battery cluster.

[0034] As Figure 3 and Figure 4 shown, the interior of the main energy storage cabinet includes a busbar bin 7. Inside the busbar bin 7, there are a main circuit breaker 8, a current transformer 10, a load output copper bar 9, an ammeter 4, and an energy management system EMS. The air conditioner 11, fire protection device 6, PCS converter 3, and high-voltage box 12 are all controlled by the EMS; after the main energy storage cabinet and the slave energy storage cabinets are busbar-connected, the load is output through the load output copper bar 9.

[0035] As Figure 5 and Figure 6 shown, the slave energy storage cabinets connected in parallel and busbar-connected to the main energy storage cabinet are N in number, where N is greater than or equal to 1. The N slave energy storage cabinets are busbar-connected to the main energy storage cabinet and are connected to the load through the main energy storage cabinet. The slave energy storage cabinets are busbar-connected to the busbar 5 of another slave energy storage cabinet or the busbar 5 of the main energy storage cabinet through the busbar 5 inside the cabinet 1.

[0036] The cabinet 1 includes an independent first space 101 and a second space 102. The battery clusters are all placed in the first space 101; the second space 102 includes a fire protection device 6, a PCS converter 3, a high-voltage box 12, and a busbar 5.

[0037] Among them, the air conditioner 11 is located at the top of the cabinet 1 and is used to cool the space inside the cabinet 1.

[0038] As Figure 4 shown, the second space 102 of the main energy storage cabinet also includes a busbar bin 7. The slave energy storage cabinets are paralleled through the busbar bin 7 to realize the busbar connection of the entire energy storage system. In this way, there is no need to separately set up a busbar cabinet, and flexible expansion can be achieved.

[0039] As shown Figure 5 in the figure, a storage groove 104 is provided on the inner surface of the cabinet door in the first space 101 of the cabinet body 1 for placing tools or documents; a shutter 103 is fixed to the cabinet door in the first space 101 of the cabinet body 1, and the air flow between the internal environment and the external environment of the first space 101 is circulated through the shutter 103.

[0040] The busbar connection solution is modular, standardized, with lower costs, more convenient installation, and highly integrated.

[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An energy storage confluence system, characterized in that: include A main energy storage cabinet, wherein the main energy storage cabinet comprises a junction chamber (7), and a main circuit breaker (8), a current transformer (10), a load output copper busbar (9), an electric meter (4) and an electric energy management system (EMS) are arranged inside the junction chamber (7); A slave energy storage cabinet is connected in parallel with the master energy storage cabinet, and there are N slave energy storage cabinets. The N slave energy storage cabinets converge into the master energy storage cabinet, and are connected to the load through the master energy storage cabinet.

2. The energy storage confluence system according to claim 1, characterized in that: The master energy storage cabinet and the slave energy storage cabinet are both provided with a battery pack (2), an air conditioner (11), a fire protection device (6), a PCS converter (3), a high-voltage box (12), a terminal block (5) and a cabinet body (1).

3. The energy storage confluence system according to claim 2, characterized in that: A plurality of battery packs (2) are stacked on one side of the cabinet (1) to form a battery cluster.

4. The energy storage confluence system according to claim 3, characterized in that: The slave energy storage cabinet is connected to the wiring bar (5) of another slave energy storage cabinet or the wiring bar (5) of the master energy storage cabinet via the wiring bar (5) in the cabinet body (1).

5. The energy storage confluence system according to claim 4, characterized in that: The cabinet (1) comprises an independent first space (101) and a second space (102); the battery clusters are all placed in the first space (101); and the second space (102) comprises a fire protection device (6), a PCS converter (3), a high-voltage box (12), and a terminal block (5).

6. The energy storage confluence system according to claim 2, characterized in that: The air conditioner (11) is located on the top of the cabinet (1) and is used to cool the space inside the cabinet (1).

7. The energy storage confluence system according to claim 5, characterized in that: The second space (102) of the main energy storage cabinet further includes a confluence bin (7).

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