Energy storage and flow conversion integrated cabin

Abstract

The utility model provides an energy storage and current conversion integrated cabin. The energy storage and current conversion integrated cabin comprises an energy storage converter and a battery control unit, wherein the energy storage converter is in communication connection with the battery control unit; the energy storage converter is used for controlling a charging process and / or a discharging process of the battery system according to an operation state of the battery system and converting direct current of the battery system into alternating current; the battery control unit is used for monitoring the operation state of the battery system and sending the operation state to the energy storage converter. According to the invention, the energy storage converter and the battery control unit are integrated in the energy storage and current conversion integrated cabin at the same time, the system structure is simplified, external connection cables are reduced, and the complexity of the system is reduced. Meanwhile, due to the integrated design, the efficiency of the whole system can be improved, and the production, installation and maintenance cost can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage, and particularly to an integrated energy storage converter cabin. Background Art

[0002] With the rapid development of the application of renewable energy and distributed energy, industrial and commercial energy storage systems are widely used in peak-valley arbitrage, demand management, backup power supply and other fields. However, there are some challenges in the design process of existing industrial and commercial energy storage, which pose higher requirements for the large floor area, high cost, low efficiency, large volume, transportation and height limitation of the energy storage system. Traditional industrial and commercial energy storage systems usually include modules such as energy storage batteries, PCS (energy storage converters), high-voltage boxes and control systems, still adopting the design mode of large energy storage, with defects such as redundant control and protection, high cost, low space utilization rate, many links and low efficiency, and are no longer suitable for industrial and commercial application scenarios. At present, for the actual application scenarios of industrial and commercial energy storage systems, how to adopt the design mode of medium energy storage and small energy storage is an issue faced by this field. Summary of the Utility Model

[0003] The technical problem to be solved by the present disclosure is to overcome the defects of redundant control, high cost, low space utilization rate and low efficiency in the large energy storage design mode of industrial and commercial energy storage systems in the prior art, and to provide an integrated energy storage converter cabin.

[0004] The present disclosure solves the above technical problem through the following technical solutions:

[0005] The present disclosure provides an integrated energy storage converter cabin, which includes a housing, and an energy storage converter, a battery control unit, a grid interface and a battery interface integrated in the housing; wherein, the energy storage converter and the battery control unit are electrically connected;

[0006] The grid interface is used to connect the energy storage converter and the grid;

[0007] The battery interface is used to connect the energy storage converter and the battery system;

[0008] The battery control unit is used to monitor the operating state of the battery system and send a switch switching instruction to the energy storage converter;

[0009] The energy storage converter is used to switch the switch state of the switches included in the energy storage converter in response to the switch switching instruction to switch the battery state of the battery system; the battery state includes a charging state and a discharging state.

[0010] Optionally, the integrated energy storage converter cabin further includes: a disconnector; the energy storage converter and the battery system are connected through the disconnector.

[0011] Optionally, the integrated energy storage converter cabin further includes: a contactor; the energy storage converter and the battery system are connected through the contactor.

[0012] Optionally, the integrated energy storage converter cabin further includes: a fuse; the energy storage converter and the battery system are connected through the fuse.

[0013] Optionally, the integrated energy storage converter cabin further includes: a relay; the energy storage inverter and the power grid are connected through the relay.

[0014] Optionally, the integrated energy storage converter cabin further includes: a circuit breaker; the energy storage converter and the power grid are connected through the circuit breaker.

[0015] Optionally, the integrated energy storage converter cabin further includes a local monitoring module, and the local monitoring module is communicatively connected to the energy storage converter and the battery control unit respectively;

[0016] The local monitoring module is used to monitor the energy storage converter and the battery control unit; and / or, the local monitoring module is used for communication interaction between the energy storage converter and the battery control unit.

[0017] Optionally, the integrated energy storage converter cabin further includes a communication module; the communication module is used for data communication between the energy storage converter and the battery control unit.

[0018] Optionally, the integrated energy storage converter cabin further includes at least one of the following:

[0019] A fire protection device, which is electrically connected to the local monitoring module;

[0020] A water immersion prevention device, which is electrically connected to the local monitoring module;

[0021] A door magnetic device, which is electrically connected to the local monitoring module;

[0022] An emergency stop device, which is electrically connected to the local monitoring module.

[0023] Optionally, the energy storage converter and the battery control unit are encapsulated on a control board.

[0024] Optionally, the energy storage converter and the battery control unit share at least one power supply interface;

[0025] and / or, the energy storage converter and the battery control unit share at least one communication interface.

[0026] Based on common general knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present disclosure.

[0027] The positive and progressive effects of the present disclosure are as follows: By integrating the energy storage converter cabin with both an energy storage converter and a battery control unit, the energy storage converter cabin can have more comprehensive functions, and at the same time, it has the functions of bidirectional conversion of electric energy and charge and discharge management of the battery. Such a design simplifies the system structure, reduces external connection cables, and lowers the complexity of the system. At the same time, this integrated design not only helps to improve the efficiency of the entire system, but also can reduce production and installation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagrams of an energy storage system and an energy storage converter cabin provided by an exemplary embodiment of the present disclosure;

[0029] Figure 2 Schematic diagram of an energy storage converter cabin provided by an exemplary embodiment of the present disclosure.

[0030] Figure 3 Schematic diagram of another energy storage converter cabin provided by an exemplary embodiment of the present disclosure.

[0031] Figure 4 Schematic diagram of the panel configuration of an energy storage converter cabin provided by an exemplary embodiment of the present disclosure.

[0032] Figure 5 Schematic diagram of the communication architecture of an energy storage system provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present disclosure will be further described below by way of examples, but the present disclosure is not limited to the scope of the described examples.

[0034] In the embodiments of the present disclosure, prefix words such as "first" and "second" are only used to distinguish different described objects, and have no limiting effect on the position, order, priority, quantity, content, etc. of the described objects. The use of ordinal numbers and other prefix words for distinguishing described objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. The statements of the described objects refer to the descriptions in the context of the claims or embodiments, and should not constitute unnecessary limitations due to the use of such prefix words. In addition, in the description of this embodiment, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In the embodiments of the present disclosure, the collection, storage, use, processing, transmission, provision, and disclosure of user personal information and other processing all comply with the provisions of relevant laws and regulations and do not violate public order and good customs.

[0036] Embodiment 1

[0037] Figure 1Schematic diagrams of an energy storage system for industrial and commercial energy storage and an energy storage converter integrated cabin provided by an exemplary embodiment of the present disclosure. Refer to Figure 1 It can be seen that the energy storage system applied to industrial and commercial energy storage includes an energy storage converter integrated cabin 12, where the energy storage converter integrated cabin 12 includes an energy storage converter 121 (PCS, Power Conversion System) and a battery control unit 122 (BCU, Battery Control Unit); wherein, the energy storage converter 121 and the battery control unit 122 are communicatively connected; the energy storage converter 121 is configured to switch the switching state of the switches included in the energy storage converter 121 in response to the switch switching instruction, so as to switch the battery state of the battery system 11; the battery state includes a charging state and a discharging state

[0038] Control the charging process and / or discharging process of the battery system 11 according to the operating state of the battery system 11, and convert the direct current of the battery system 11 into alternating current; the battery control unit 122 is configured to monitor the operating state of the battery system 1, and send a switch switching instruction to the energy storage converter 121.

[0039] In addition, the energy storage converter integrated cabin includes a housing, and the housing integrates the energy storage converter 121 and the battery control unit 122 therein. Wherein, the energy storage converter 121 and the battery control unit 122 are electrically connected. The energy storage converter integrated cabin further includes a battery interface and a grid interface, and the grid interface is used to connect the energy storage converter 121 and the grid; the battery interface is used to connect the energy storage converter 121 and the battery system 11.

[0040] Optionally, the energy storage converter 121 and the battery control unit 122 are encapsulated in a module and placed in the housing.

[0041] Optionally, the energy storage converter 121 and the battery control unit 122 share at least one power supply interface; and / or, the energy storage converter 121 and the battery control unit 122 share at least one communication interface.

[0042] In the energy storage converter integrated cabin, the energy storage converter 121 and the battery control unit 122 are encapsulated in a module and placed in a housing, and they share at least one power supply interface and / or communication interface, which helps reduce the required installation space and makes the overall structure more compact. This is particularly important for deploying energy storage systems in space-constrained environments. At the same time, sharing the power supply interface and communication interface can significantly reduce the number of internal connection wires and cables, which not only reduces costs but also simplifies the installation process and may improve the reliability of the system. Due to the above-mentioned structural compactness, it not only helps reduce losses during energy transmission because the use of wires and connectors is reduced, thereby improving the energy conversion efficiency of the entire system, but also reduces the production and maintenance costs. The modular design makes future maintenance and upgrade work more convenient, and only the corresponding module needs to be replaced or upgraded.

[0043] It should be understood that in traditional energy storage systems, the battery control unit and the battery management unit (BMU, Battery Module Unit) are usually subordinate levels of the battery management system (BMS, Battery Management System). The present disclosure combines the BCU in the BMS with the PCS and integrates them into the same energy storage converter integrated cabin. The battery system 11 in the present disclosure includes a number of battery clusters (battery packs) and a battery management unit, and its main function is to monitor and manage individual battery modules to ensure the safety and performance of the batteries. Specifically, it can monitor physical parameters such as the voltage, temperature, and current of the battery module in real time; evaluate the state of the battery, including the state of charge (SOC) and the state of health (SOH); diagnose potential problems of the battery and provide early warnings when abnormalities occur to prevent the decline of battery performance or safety accidents; in order to extend the service life of the battery, the BMU also has an equalization management function to ensure that the performance of all individual batteries in the battery pack is consistent. In the energy storage system, the BMU usually works in cooperation with other components such as the total controller unit (BAMS) and the battery pack end control and management unit (BCMU) to form a complete battery management system. This system can not only provide two-way active lossless equalization but also exchange data with the energy management system (EMS) through internal communication to achieve more efficient energy management and optimization. In particular, the BMU in the present disclosure establishes a communication connection with the battery control unit 122, and this connection relationship will not be elaborated further hereinafter. Among them, the battery control unit is commercially available, and the present utility model does not involve improvements in the computer software of the battery control unit.

[0044] Among them, the energy storage converter 121 is the core component of the energy storage converter integrated cabin 12, responsible for converting the direct current (DC) stored in the battery system 11 into alternating current (AC) that can be supplied to the power grid or load. The energy storage converter 121 controls the charging and discharging processes according to the operating state of the battery system 11 to ensure the effective conversion of electrical energy. The energy storage converter 121 has an energy conversion function, that is, it can convert AC and DC mutually, which means it can convert the DC stored in the battery (battery cluster) into AC that can be supplied to the power grid or load, and at the same time, it can rectify the AC of the power grid into DC to charge the energy storage system. This bidirectional conversion function enables the energy storage system to flexibly respond to different power demands. At the same time, the energy storage converter 121 also has a connection bridge function, that is, it acts as a bridge connecting the energy storage device and the power system in the energy storage system, ensuring the effective flow of electrical energy and the stable operation of the system. The energy storage inverter can provide high-quality electrical energy, reduce the electricity cost, and improve the electricity utilization efficiency. This is very beneficial to the stability of the power system and the economic benefits of users.

[0045] Among them, the main function of the battery control unit 122 is to monitor the operating state of the battery system 11, including key parameters such as voltage, current, and temperature, and send this information to the energy storage converter 121 in real time. In this way, the converter can adjust the charge and discharge strategy according to the actual state of the battery to optimize the performance and life of the battery. In addition to the energy conversion function of the energy storage converter 121, the energy storage converter integrated cabin 12 also realizes multiple functions such as battery management, system protection, and energy management, improving the intelligent level and operating efficiency of the entire system.

[0046] Optionally, the energy storage converter and the battery control unit are encapsulated in a module and placed in a housing.

[0047] Optionally, the energy storage converter and the battery control unit share at least one power supply interface; and / or, the energy storage converter and the battery control unit share at least one communication interface.

[0048] In the energy storage converter integrated cabin, the energy storage converter and the battery control unit are encapsulated in one module and placed in a housing, and they share at least one power supply interface and / or communication interface, which helps to reduce the required installation space and makes the overall structure more compact. This is particularly important for deploying energy storage systems in space-constrained environments. At the same time, sharing the power supply interface and communication interface can significantly reduce the number of internal connection wires and cables, which not only reduces costs, but also simplifies the installation process and may improve the reliability of the system. Due to the above structural compactness, it not only helps to reduce losses during the energy transmission process, because the use of wires and connectors is reduced, thereby improving the energy conversion efficiency of the entire system, but also reduces the production and maintenance costs. The modular design makes future maintenance and upgrade work more convenient, and only the corresponding module needs to be replaced or upgraded.

[0049] In summary, through the highly integrated design, the energy storage converter integrated cabin 12 of the present disclosure provides users with an efficient, intelligent, and multifunctional energy management solution. The energy storage inverter system is widely used not only in industrial and commercial energy storage, but also plays a key role in multiple fields such as electric vehicle charging systems, microgrids, and remote communication sites.

[0050] Optionally, the energy storage converter integrated cabin 12 may further include at least one of the following components: disconnector, contactor, relay, circuit breaker, and fuse; optionally, the connection relationships of these components satisfy at least one of the following conditions: the energy storage converter 121 and the battery system 11 are connected by a contactor; the energy storage converter 121 and the battery system 11 are connected by a fuse; the energy storage inverter 121 and the power grid are connected by a relay; the energy storage converter 121 and the power grid are connected by a circuit breaker.

[0051] Among them, the disconnector provides electrical isolation between the battery system 11 and other parts of the inverter cabin, so as to facilitate maintenance or quickly cut off the power supply in case of an abnormality; the contactor is used to remotely or automatically control the opening and closing of the circuit, and is used in conjunction with the fuse to provide overload and short-circuit protection; the relay is used to implement an automatic switching function in the circuit, is connected in parallel with the contactor, and jointly completes the control and protection of the circuit; the fuse is a safety device, when the current exceeds the specified value, the fuse will blow to protect the circuit from damage, and is used in conjunction with the above-mentioned contactor.

[0052] Optionally, the energy storage converter integrated cabin 12 further includes: a power grid interface; the power grid interface is respectively connected to the energy storage converter 121 and the power grid.

[0053] Among them, the power grid interface is located between the energy storage converter integrated cabin 12 and the external power grid, so that the electric energy output by the battery system 11 can be transmitted to the power grid, or the electric energy can be obtained from the power grid and input into the battery system 11 when necessary.

[0054] Optionally, the integrated energy storage and conversion cabin 12 further includes: a battery interface; the battery interface is connected to the disconnector.

[0055] Wherein, the battery interface is between the disconnector and the battery system 11 to ensure that the battery pack can be safely connected to the inverter cabin.

[0056] In a specific embodiment, reference can be made to Figure 2 , wherein, M0 is the disconnector, M1 is the relay, M2 is the contactor, Q1 is the circuit breaker, CT1, CT2 and CT3 are current transformers, and FU1 and FU2 are fuses. The connection relationship of the devices is that the positive output terminal and the negative output terminal of the battery system are respectively connected to the fuse FU1 and the fuse FU2 through the disconnector M0, and the fuse FU1 and the fuse FU2 are respectively connected to the battery positive interface and the battery negative interface through the contactor M2. The lines between the PCS and the power grid are the four lines corresponding to the three-phase four-wire system. Three of the phase lines are respectively connected to the current transformers CT1, CT2 and CT3 through the relay M1, and the three current transformers are connected to the circuit breaker, and the circuit breaker is between the power grid and the current transformer.

[0057] In another specific embodiment, reference can be made to Figure 3 , wherein, BATp is the positive output terminal of the battery system 11, and BATn is the negative output terminal of the battery system 11; the switches respectively connected to BATp and BATn are disconnectors, and there are two disconnectors in Figure 3 ; Rly1 is the contactor, and there are two contactors in Figure 3 ; SS-Rly1 is the relay; Fuse is the fuse, and there are two fuses in Figure 3 ; the two fuses are connected to the input end of the PCS, and the output ends of the PCS are respectively L A 、L B and L C , to correspond to the three-phase four-wire power system. The three-phase four-wire system is usually used in low-voltage distribution networks, especially in supplying residential areas, commercial buildings and some industrial facilities. Specifically in the civilian field, the advantage of this system is that it can provide three-phase and single-phase power sources simultaneously to meet diverse power consumption needs. It should be understood that the three-phase four-wire system includes three phase lines (L A 、L B and L C ) and a neutral line (N line or zero line). In the low-voltage distribution system, this configuration allows the simultaneous transmission of three-phase electrical energy and single-phase electrical energy. Three-phase electrical energy is mainly used for high-power equipment such as air-conditioning systems and water pumps, while single-phase electrical energy is suitable for daily electrical equipment such as household appliances. Therefore, the grid interface set at the output end of the PCS needs to correspond to 4 interfaces, which are respectively connected to L A 、L B 、LC corresponds to the N wire. Specifically, reference can be made to Figure 4 the panel configuration embodiment of the integrated energy storage and conversion cabin 12 shown in Figure 4 It can be seen that the panel includes: PE interface 31, PE interface 32, grid interface 33, grid interface 34, grid interface 35, grid interface 36, 220V mains interface 37, AC handle 38, DC handle 39, lamp board 40, battery positive interface 41, battery negative interface 42, communication stick 43, RJ45 interface 44, RJ45 interface 45, COM interface 46, COM interface 47.

[0058] Among them, PE interface 31 and PE interface 32 are used to connect to the PE wire. The full name of the PE wire is protective earthing conductor, that is, the protective conductor, and the PE wire is a conductor used for the protective earthing of electrical equipment. Grid interface 33, grid interface 34, grid interface 35, and grid interface 36 are respectively connected to three phase lines (L A 、L B and L C ) and a neutral wire (N wire or zero wire) of the three-phase four-wire system. The 220V mains interface 37 is used to connect to the mains to supply power to the integrated energy storage and conversion cabin itself. The battery positive interface 41 and the battery negative interface 42 are respectively connected to the positive output terminal and the negative output terminal of the battery system 11. The AC handle 38 is a handle for controlling at the AC end and includes switch control. The DC handle 39 is a handle for controlling at the DC end and includes switch control. The lamp board 40 is an indicator lamp for displaying the working state of the integrated energy storage and conversion cabin.

[0059] Optionally, the integrated energy storage and conversion cabin 12 further includes a local monitoring module (SCU, Sub-Control Unit), and the local monitoring module is respectively communicatively connected to the energy storage converter 121 and the battery control unit 122;

[0060] Among them, the local monitoring module is used to monitor the energy storage converter 121 and the battery control unit 122; and / or, the local monitoring module is used for the communication interaction between the energy storage converter 121 and the battery control unit 122.

[0061] The local monitoring module is responsible for monitoring the working states of the energy storage converter 121 and the battery control unit 122, and may also be responsible for the communication interaction between them, so as to process data and execute commands in a timely manner. Optionally, in the power and energy storage system, the SCU is responsible for the monitoring and control functions of the local area or subsystem, and works in cooperation with the Main Control Unit (MCU) to ensure the efficient and stable operation of the system. Among them, the specific model of the local monitoring module varies due to different manufacturers and application scenarios, such as the SCU-01K4CN sold on the market.

[0062] Optionally, the integrated energy storage and conversion cabin 12 further includes a communication module; the communication module is used for communication interaction with the energy management module 14.

[0063] Among them, the energy storage system further includes an energy management module 14, and the energy management module 14 corresponds to an energy management system (EMS, Energy Management System), which is responsible for monitoring, controlling, and optimizing the production, storage, and consumption of energy, ensuring the efficient use of energy, and supporting the integration and management of renewable energy. In power systems, smart grids, and industrial and commercial energy storage solutions, the energy management module 14 plays a crucial role. Therefore, in order to achieve communication interaction with the energy management module 14, the communication module provides necessary communication interfaces, enabling the integrated energy storage and conversion cabin 12 to receive commands from the energy management module 14 or send status information to it.

[0064] With the intelligent development of the integrated energy storage and conversion cabin, it is very necessary for each component to communicate. Based on the above content, referring to Figure 5 FIG. is a schematic diagram of an energy storage system communication architecture for industrial and commercial energy storage provided by an exemplary embodiment of the present disclosure. As Figure 5 shown, the local monitoring module (SCU, Sub-Control Unit), in addition to being communicatively connected to the power conversion system (PCS) and the battery control unit (BCU), also externally connects an antenna and a network for establishing wired / wireless communication with the outside. It is also communicatively connected to an air conditioner, a fire protection device, a water immersion prevention device, a door magnetic device, an LED indicator light, a shunt trip, and an emergency stop device respectively. In addition, the BCU establishes a communication connection with the chassis of each battery of the battery system through a CAN bus, and each chassis corresponds to a BMU respectively.

[0065] Among them, the fire protection device generally refers to a set of equipment and measures used to prevent and respond to fires in the energy storage system. This may include gas fire extinguishing systems, sprinkler systems, fire alarms, etc. They can quickly respond in case of a fire to control or extinguish the fire and protect the energy storage facilities from fire damage. Specifically, gas detectors and alarm systems should be installed in flammable areas, while fire extinguishers and fire sandboxes should be placed in easily accessible locations; the anti-flooding device is a safety device to prevent water from invading the interior of the energy storage converter integrated cabin. In the energy storage system, electrical equipment such as batteries is highly sensitive to water. Once water ingress occurs, it may lead to short circuits and even fires. Therefore, the anti-flooding device can detect water ingress and trigger an alarm or other emergency responses to prevent further damage. It is usually installed in the low-lying areas of the cabin or positions with a high risk of potential water accumulation to ensure timely detection and measures can be taken in case of waterlogging; the door magnetic device is a sensor used to monitor the opening and closing status of the door of the energy storage converter integrated cabin. It can detect when the door is opened or closed and issue an alarm in case of an abnormality to ensure that the physical security of the energy storage system is not threatened by unauthorized access. It is usually installed on the door frame and electrically connected to the on-site monitoring module to ensure an alarm can be issued in any unauthorized opening situation; the emergency stop device, also known as the emergency stop switch, is an important safety mechanism in the energy storage converter integrated cabin. When system operators identify dangerous situations (such as fires, electrical failures, etc.), they can quickly activate the emergency stop device to cut off the power supply and stop all running equipment to avoid further injuries or losses. It should be installed in a position that is easily accessible to operators, such as inside the cabin door or near the control console, so that actions can be taken immediately in case of an emergency. Shunt trip is a device used to remotely operate the circuit breaker to trip. It usually exists as a part or accessory of the circuit breaker. The shunt trip mainly consists of two parts: one is the trip coil, and the other is the release. When the shunt coil receives a specified voltage signal, it generates an electromagnetic force to drive the release to act, thereby causing the circuit breaker to trip and cut off the circuit. This mechanism is particularly important in the fire alarm system because it can remotely control the circuit breaker of non-fire-fighting loads to ensure that the power supply can be quickly cut off in case of an emergency to prevent the spread of fire. In addition, the operating power supply of the shunt trip usually comes from the secondary DC main power supply, which means it uses transformed direct current. This power supply can provide a stable voltage to ensure that the shunt trip can reliably perform the tripping operation when necessary. The specific installation locations of the safety devices in the energy storage converter integrated cabin generally follow industry specifications and the design requirements of the manufacturer. The following are the possible installation locations of each device:

[0066] Among them, the interfaces of the SCU body specifically include: 2 network ports (Ethernet ports), 4 serial ports (serial communication ports), 8 GPIOs (general-purpose input / output ports), 6 USBs (universal serial bus ports), 1 HDMI (high-definition multimedia interface), and 1 VGA (video graphics array interface); the PCS communicates using the RS-485 communication protocol. RS-485 is a communication protocol for differential signal transmission, suitable for long-distance and high-rate data transmission. The BCU and the SCU also use the RS-485 protocol when communicating with the upper-level devices. Placing 2 antennas outside the energy storage inverter cabin can provide better signal reception or transmission effects. The input / output interfaces of the SCU are GPIOs, and the operating voltage range of these GPIO interfaces is 0 to 5 volts. A relay is added to the shunt trip mechanism of the BCU to assist in automatic regulation, safety protection, etc.

[0067] These modules together constitute the safety protection system of the energy storage inverter cabin. By cooperating with each other, they ensure the safe operation of the energy storage station under various potential dangerous situations. Compared with the traditional solution, the technical solution of the present disclosure can effectively increase the discharge capacity and efficiency, and reduce the floor area and cost. At the same time, the system efficiency of the energy storage system can be increased by 4%, the area energy density can be increased by 25%, the cost can be reduced by more than 5%, and the system operation safety can be greatly improved.

[0068] Although the specific implementation manners of the present disclosure have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present disclosure is defined by the appended claims. Without departing from the principles and essence of the present disclosure, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. An integrated energy storage and flow conversion cabin, characterized in that: The energy storage and conversion integrated cabin comprises a shell, and an energy storage converter, a battery control unit, a grid interface and a battery interface integrated in the shell; wherein the energy storage converter and the battery control unit are electrically connected; The grid interface is used to connect the energy storage converter and the grid; The battery interface is used to connect the energy storage converter and the battery system; The battery control unit is used to monitor the operating status of the battery system and send a switch switching instruction to the energy storage converter; The energy storage converter is used to switch the switch state of the switch included in the energy storage converter in response to the switch switching instruction to switch the battery state of the battery system; the battery state includes a charging state and a discharging state.

2. The energy storage and flow conversion integrated cabin according to claim 1 is characterized in that: The energy storage and conversion integrated cabin also includes: an isolating switch; the energy storage converter and the battery system are connected via the isolating switch.

3. The energy storage and flow conversion integrated cabin according to claim 1 is characterized in that: The energy storage and conversion integrated cabin also includes: a contactor; the energy storage converter and the battery system are connected via the contactor.

4. The energy storage and flow conversion integrated cabin according to claim 1 is characterized in that: The energy storage and conversion integrated cabin also includes: a fuse; the energy storage converter and the battery system are connected via the fuse.

5. The energy storage and flow conversion integrated cabin according to claim 1 is characterized in that: The energy storage and power conversion integrated cabin also includes: a relay; the energy storage inverter and the power grid are connected via the relay.

6. The energy storage and flow conversion integrated cabin according to claim 1 is characterized in that: The energy storage and conversion integrated cabin also includes: a circuit breaker; the energy storage converter and the power grid are connected via the circuit breaker.

7. The energy storage and flow conversion integrated cabin according to claim 1 is characterized in that: The energy storage and conversion integrated cabin also includes an on-site monitoring module, which is respectively connected to the energy storage converter and the battery control unit for communication; The local monitoring module is used to monitor the energy storage inverter and the battery control unit; and / or, the local monitoring module is used for communication interaction between the energy storage inverter and the battery control unit.

8. The integrated energy storage and flow conversion cabin according to claim 1 is characterized in that: The energy storage and conversion integrated cabin also includes a communication module; the communication module is used for data communication between the energy storage converter and the battery control unit.

9. The energy storage and flow conversion integrated cabin according to claim 1, characterized in that: The energy storage and flow conversion integrated cabin also includes at least one of the following: A fire-fighting device, the fire-fighting device being electrically connected to the local monitoring module; An anti-flooding device, the anti-flooding device is electrically connected to the local monitoring module; A door magnetic device, the door magnetic device is electrically connected to the local monitoring module; An emergency stop device is electrically connected to the local monitoring module.

10. The energy storage and flow conversion integrated cabin according to claim 1, characterized in that: The energy storage converter and the battery control unit are packaged on a control board.

11. The energy storage and flow conversion integrated cabin according to claim 1, characterized in that: The energy storage converter and the battery control unit share at least one power supply interface; And / or, the energy storage converter and the battery control unit share at least one communication interface.

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