Energy storage all-in-one machine with energy conversion function

Abstract

The utility model belongs to the technical field of energy storage, and discloses an energy storage all-in-one machine with an energy conversion function, which comprises a cabinet body, an energy storage converter, a high-voltage box, an energy management system (EMS), a circuit breaker, a sensor module and a plurality of energy storage batteries are arranged in the cabinet body, and the energy storage batteries are connected in series and then connected with the input end of the high-voltage box in series. The output end of the high-voltage box is connected with the input end of the energy storage converter, and the output end of the energy storage converter is connected with a power grid through a circuit breaker QF; each energy storage battery is connected with a battery management system, the battery management systems of the energy storage batteries are sequentially connected through a daisy chain and then are in communication connection with the EMS energy management system through CAN communication, and the communication section of the energy storage converter and the sensor module are in communication connection with the EMS energy management system. The system can assist the power distribution network to realize valley filling and peak clipping, and the convenience of power supply in the park is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and in particular relates to an integrated energy storage machine with an energy conversion function. Background Art

[0002] With technological advancements and increasing energy demands, the need for diverse forms of energy storage is becoming increasingly urgent. Existing energy storage technologies include mechanical, chemical, electrochemical, and electromagnetic storage, each of which can be further categorized into various technologies. Given the current expansion of distributed photovoltaic systems within industrial and commercial parks and the reduction in energy storage system costs, industrial and commercial energy storage is poised for growth.

[0003] Traditional containerized energy storage systems, due to their large footprint, are limited in space when used in industrial and commercial parks with high energy storage needs. Furthermore, they require 24 / 7 staffing, resulting in high O&M costs. Meanwhile, household energy storage systems have limited storage capacity and cannot meet the electricity needs of industrial and commercial users. Utility Model Content

[0004] The utility model overcomes the deficiencies of the existing technology and aims to solve the following technical problems: to provide an integrated energy storage device with energy conversion function to realize the time domain shift of energy, effectively assist the distribution network demand response, perform peak shaving and valley filling, delay the upgrade and expansion of the distribution network, and reduce the construction investment cost of the distribution network.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: an energy storage integrated machine with energy conversion function, including a cabinet, in which an energy storage converter, a high-voltage box, an EMS energy management system, a circuit breaker QF1, a sensor module, and multiple energy storage batteries are arranged. The energy storage batteries are connected in series and then connected in series with the input end of the high-voltage box. The output end of the high-voltage box is connected to the input end of the energy storage converter, and the output end of the energy storage converter is connected to the power grid through the circuit breaker QF1.

[0006] Each energy storage battery is connected to a battery management system respectively. The battery management systems of each energy storage battery are connected in sequence through a daisy chain and then communicated with the EMS energy management system through CAN communication. The communication segment and sensor module of the energy storage inverter are communicated with the EMS energy management system.

[0007] A heat dissipation air conditioner is also provided in the cabinet.

[0008] The heat dissipation air conditioner is communicatively connected with the EMS energy management system.

[0009] An access door is provided on the side of the cabinet body. A first partition is arranged horizontally inside the cabinet body. Above the first partition is used for placing the energy storage converter and the EMS energy management system. A second partition is arranged vertically below the first partition. Behind the second partition is used for arranging the cooling air conditioner, and in front of the second partition is used for arranging the energy storage battery and the high-voltage box.

[0010] Each energy storage battery and the corresponding battery management system are respectively arranged in an air-cooled pack box. The air ducts of each air-cooled pack box are communicated with the cooling air conditioner through pipelines.

[0011] The sensor module includes: a temperature and humidity sensor, a water immersion sensor, a CO sensor, an H2 sensor, a smoke sensor, and a temperature sensor. The temperature and humidity sensor, the CO sensor, and the H2 sensor are communicatively connected to the EMS energy management system through 485 communication.

[0012] The described energy storage integrated machine with an energy conversion function includes a circuit breaker QF2 and a capacitor FV. The output end of the energy storage converter is grounded through the circuit breaker QF1, the circuit breaker QF2, and the capacitor FV.

[0013] The described energy storage integrated machine with an energy conversion function further includes a remote communication module. The EMS energy management system is connected to the cloud platform through the remote communication module, and then connected to the intelligent terminal.

[0014] The present utility model has the following beneficial effects compared with the prior art: The present utility model provides an energy storage integrated machine with an energy conversion function. During the valley-time electricity price period, the energy storage integrated machine charges, stores electric energy at a low price and assists the distribution network to fill valleys. During the peak-time electricity price period, the energy storage integrated machine discharges, assisting the distribution network to shave peaks; it can delay the upgrade and expansion of the distribution network and reduce the construction investment cost of the distribution network. Description of the Drawings

[0015] Figure 1 It is a schematic external structure diagram of an energy storage integrated machine with an energy conversion function provided by an embodiment of the present utility model;

[0016] Figure 2 For Figure 1 the left view;

[0017] Figure 3 It is a schematic internal structure diagram of an energy storage integrated machine with an energy conversion function provided by an embodiment of the present utility model;

[0018] Figure 4 It is a schematic control circuit structure diagram of an energy storage integrated machine with an energy conversion function provided by an embodiment of the present utility model;

[0019] Figure 5 Schematic diagram of the circuit principle of an energy storage integrated machine with energy conversion function provided in an embodiment of the present invention;

[0020] In the figure, 1 is the cabinet, 2 is the energy storage converter, 3 is the high-voltage box, 4 is the EMS energy management system, 5 is the maintenance door, 6 is the first partition, 7 is the second partition, 8 is the air-cooled pack box, 9 is the cooling air conditioner, 10 is the air inlet, 11 is the air outlet, 12 is the energy storage battery, 13 is the human-machine interaction module, 14 is the display lamp module, 15 is the emergency stop button, and 16 is the air-cooled pipeline. Specific embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 5 shown, an embodiment of the present invention provides an energy storage integrated machine with energy conversion function, including a cabinet 1. Inside the cabinet 1, there are an energy storage converter 2, a high-voltage box 3, an EMS energy management system 4, a circuit breaker QF1, a sensor module, and multiple energy storage batteries. After being connected in series, the energy storage batteries are connected in series with the input end of the high-voltage box 3. The output end of the high-voltage box 3 is connected to the input end of the energy storage converter 2. The output end of the energy storage converter 2 is connected to the power grid through the circuit breaker QF1. Each energy storage battery is connected with a battery management system. The battery management systems of the energy storage batteries are connected in series through a daisy chain and then communicate with the EMS energy management system 4 through CAN communication. The communication section of the energy storage converter 2 and the sensor module communicate with the EMS energy management system 4.

[0023] Further, as Figure 2 shown, a cooling air conditioner 9 is also provided inside the cabinet 1. An air inlet 10 and an air outlet 11 are also provided at the position of the cabinet 1 corresponding to the energy storage converter 2 to realize the heat dissipation of the energy storage converter.

[0024] Further, as Figures 2 to 3 shown, a maintenance door 5 is provided on the side of the cabinet 1. A first partition 6 placed horizontally is provided inside the cabinet 1. The upper part of the first partition 6 is used to place the energy storage converter 2 and the EMS energy management system 4. A second partition 7 in the vertical direction is provided below the first partition. The rear of the second partition 7 is used to set the cooling air conditioner 9, and the front of the second partition 7 is used to set the energy storage battery and the high-voltage box 3.

[0025] Further, as Figure 3 shown, each energy storage battery and its corresponding battery management system are respectively arranged in an air-cooled pack box 8, and the air ducts of each air-cooled pack box 8 are communicated with the heat dissipation air conditioner 9 through an air-cooled pipeline 16.

[0026] Specifically, in this embodiment, 15 energy storage batteries, 15 corresponding air-cooled pack boxes 8 and a high-voltage box 3 are arranged side by side in two columns.

[0027] Further, as Figure 4 shown, the heat dissipation air conditioner 9 is communicatively connected to the EMS energy management system 4.

[0028] Further, as Figure 4 shown, the sensor module includes: a temperature and humidity sensor, a water immersion sensor, a CO sensor, an H2 sensor, a smoke sensor, and a temperature sensor. The temperature and humidity sensor, the CO sensor, and the H2 sensor are communicatively connected to the EMS energy management system 4 through 485 communication. The smoke sensor and the temperature sensor can specifically be a smoke alarm and a temperature sensor alarm. The sensor module is arranged inside the cabinet to monitor the environmental quantity information inside the cabinet. In addition, an aerosol fire protection system is also arranged inside the cabinet to monitor the internal fire hazard and start the fire protection.

[0029] As Figure 4 shown, in this embodiment, the EMS energy management system 4 is in a position that links up and down. On the one hand, it interacts with the cloud platform through remote communication units such as RJ485 / fiber optic / 4G in the upward direction. On the other hand, it interacts, collects, or controls the operating states of the components inside the cabinet through local RS485 / CAN / YXDI / YKDO, so as to achieve the purpose of monitoring and controlling the entire energy storage operating state. The environmental quantity, security, and equipment state in the energy storage system are collected and the information is transmitted to the upper cloud platform.

[0030] Further, as Figure 5 shown, a kind of energy storage integrated machine with an energy conversion function in this embodiment further includes a circuit breaker QF2 and a capacitor FV. The output end of the energy storage converter 2 is grounded through the circuit breaker QF1, the circuit breaker QF2, and the capacitor FV.

[0031] Further, as Figure 4 shown, a kind of energy storage integrated machine with an energy conversion function in this embodiment further includes a remote communication module. The EMS energy management system 4 is connected to the cloud platform through the remote communication module and then connected to the intelligent terminal.

[0032] Further, as Figure 1 and Figure 4As shown, in this embodiment, the cabinet 1 is also provided with a human-machine interaction module 13, a display light module 14, and an emergency stop button 15. The human-machine interaction module 13, the display light module 14, and the emergency stop button 15 are connected to the EMS energy management system 4, thereby enabling human-machine interaction, status display, and emergency stop. The display light module includes a power indicator, an operation indicator, a fault indicator, and the like.

[0033] The working principle of the present invention is as follows: the energy storage integrated machine can select off-grid and grid-connected operation modes, mainly realizing the functions of charging during valley hours and discharging during peak hours, so as to achieve the function of peak-valley arbitrage. Specifically, the current operation mode of the integrated machine can be confirmed through the management system software or the cloud platform communicating with the energy management system (EMS), or the operation mode can be controlled through the local human-computer interaction module. After receiving the mode control instruction, the EMS energy management system will automatically adjust the battery charging and discharging power to achieve the control target. Specifically, when the electricity price is in valley hours, the energy storage integrated machine is charged to store electricity at a low price. When the electricity price is in peak hours, the energy storage integrated machine is discharged to supply load operation, which can reduce the purchase of electricity from the distribution network or even send the surplus electricity to the grid, thereby assisting the distribution network in peak shaving; during the normal electricity price period, the energy storage integrated machine manages the battery health of the energy storage battery.

[0034] In summary, the present invention provides an energy storage integrated machine with energy conversion function, with a designed charge and discharge rate of 0.5P. The energy storage battery cell type is lithium iron phosphate with a capacity of 215kWh. The energy storage converter (PCS) has a rated power of 100kW. The battery management system (BMS) monitors the voltage and temperature of the battery during operation. The EMS energy management system acts as a control center to carry out comprehensive energy management and control and support the stable and reliable operation of the park power grid system. The EMS energy management system collects and processes real-time operation data from various locations, uses a reliable communication architecture to conduct effective information exchange with various devices in the system, combines energy storage with new energy elements such as wind power, photovoltaics, and charging stations, improves the absorption ratio of new energy, optimizes power dispatching, and can perform peak shaving and valley filling to ensure the safe and stable operation of the power system. The energy storage integrated machine of the present invention supports multiple operating modes and operating strategies, has very flexible adaptability, and supports both grid-connected and off-grid operating modes. At the same time, it has environmental collection, judgment and early warning functions, and can upload information to the cloud platform in real time, doubly protecting the safe operation of the energy storage integrated machine. During off-peak electricity price periods, the energy storage device is charged, storing electricity at a low price and assisting the distribution network in filling the valley. During peak electricity price periods, the energy storage device is discharged to assist the distribution network in peak shaving. This can delay the upgrade and expansion of the distribution network and reduce the construction investment cost of the distribution network.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy storage integrated machine with an energy conversion function, characterized in that It includes a cabinet body (1), in which an energy storage converter (2), a high-voltage box (3), an EMS energy management system (4), a circuit breaker QF1, a sensor module, and multiple energy storage batteries are arranged. After the energy storage batteries are connected in series, they are connected in series with the input end of the high-voltage box (3). The output end of the high-voltage box (3) is connected to the input end of the energy storage converter (2), and the output end of the energy storage converter (2) is connected to the power grid through the circuit breaker QF1; Each energy storage battery is respectively connected with a battery management system. The battery management systems of each energy storage battery are connected in sequence through a daisy chain and are communicatively connected to the EMS energy management system (4) through CAN communication. The communication section of the energy storage converter (2) and the sensor module are communicatively connected to the EMS energy management system (4).

2. The integrated energy storage machine with an energy conversion function according to claim 1, characterized in that A cooling air conditioner (9) is also arranged in the cabinet body.

3. The integrated energy storage device with an energy conversion function according to claim 2, wherein, The cooling air conditioner (9) is communicatively connected to the EMS energy management system (4).

4. A combined energy storage machine with an energy conversion function according to claim 1, characterized in that An inspection door (5) is arranged on the side of the cabinet body (1). A first partition board (6) placed horizontally is arranged in the cabinet body (1). The upper part of the first partition board (6) is used for placing the energy storage converter (2) and the EMS energy management system (4). A second partition board (7) in the vertical direction is arranged below the first partition board (6). The rear of the second partition board (7) is used for arranging the cooling air conditioner (9), and the front of the second partition board (7) is used for arranging the energy storage battery (8) and the high-voltage box (3).

5. The integrated energy storage machine with an energy conversion function according to claim 4, characterized in that, Each energy storage battery and the corresponding battery management system are respectively arranged in an air-cooled pack box (8). The air inlets of each air-cooled pack box (8) are communicated with the cooling air conditioner (9) through pipelines.

6. The integrated energy storage machine with an energy conversion function according to claim 1, wherein, The sensor module includes: a temperature and humidity sensor, a water immersion sensor, a CO sensor, an H2 sensor, a smoke sensor, and a temperature sensor. The temperature and humidity sensor, the CO sensor, and the H2 sensor are communicatively connected to the EMS energy management system (4) through 485 communication.

7. The integrated energy storage machine with an energy conversion function according to claim 1, wherein, It also includes a circuit breaker QF2 and a capacitor FV. The output end of the energy storage converter (2) is grounded through the circuit breaker QF1, the circuit breaker QF2, and the capacitor FV.

8. A combined energy storage machine with an energy conversion function according to claim 1, characterized in that, It also includes a remote communication module. The EMS energy management system (4) is connected to the cloud platform through the remote communication module and then connected to the intelligent terminal.

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