Optical storage grid-connected and off-grid device

Abstract

An optical storage grid-connected and off-grid device is characterized in that the optical storage grid-connected and off-grid device comprises a cabinet, a plurality of battery packs are arranged in the cabinet, an EMS energy management system, a high-voltage box, a DC / DC power module and a PCS power module are sequentially arranged below the cabinet, and a first protection switch, a second protection switch, a third protection switch and a fourth protection switch are further arranged below the cabinet; an STS switching power module is also arranged; the STS switching power module further comprises an electrical part, the STS switching power module is connected with a mains supply end through the first protection switch and connected with a load end through the second protection switch, and the fourth protection switch is arranged between the mains supply end and the load end. The STS switching power module is connected with the battery pack through the PCS power module, the DC / DC power module and the high-voltage box in sequence, and the EMS energy management system is used for sending control signals to the STS switching power module, the high-voltage box, the DC / DC power module and the PCS power module.

Description

Technical Field

[0001] The utility model relates to the field of off-grid energy storage, in particular to a photovoltaic storage and off-grid device. Background Art

[0002] Existing on-grid and off-grid systems are usually composed of energy storage battery systems, on-grid and off-grid cabinet systems, photovoltaic systems and EMS energy management systems. These multiple components are independent of each other, bulky in size, and require cumbersome on-site construction, resulting in high overall costs. Utility Model Content

[0003] In order to solve the above problems, the present technical solution provides a photovoltaic storage and off-grid device.

[0004] To achieve the above purpose, the technical solution is as follows:

[0005] A photovoltaic and energy storage off-grid device, characterized by comprising a cabinet, wherein a plurality of battery packs are disposed within the cabinet, an EMS energy management system, a high-voltage box, a DC / DC power module, and a PCS power module are sequentially disposed below the cabinet, a first protection switch, a second protection switch, a third protection switch, and a fourth protection switch are also disposed below the cabinet, and an STS switching power module is also disposed;

[0006] It also includes an electrical part, the STS switching power module is connected to the mains end through the first protection switch, and is also connected to the load end through the second protection switch. The fourth protection switch is arranged between the mains end and the load end. The STS switching power module is connected to the battery pack through the PCS power module, DC / DC power module and high-voltage box in sequence. The EMS energy management system is used to send control signals to the STS switching power module, high-voltage box, DC / DC power module and PCS power module.

[0007] In some embodiments, the PCS power module is further connected to a photovoltaic terminal through the third protection switch.

[0008] In some embodiments, the cabinet is further connected to a heat dissipation device, a fan is provided in the battery pack, and the heat dissipation device and the fan cooperate to form an air duct to dissipate heat from the cabinet.

[0009] In some embodiments, the heat dissipation device is located on one side of the rear door panel of the cabinet. Cold air is sent out from the heat dissipation device and drawn out by the fan on the back of the battery pack. The generated hot air flows back from the upper half of the cabinet to the return air outlet of the heat dissipation device, and then circulates back and forth to dissipate heat.

[0010] The beneficial effects of this application are:

[0011] This application integrates multiple input sources into one, connects them to the STS switching power module through corresponding protection switches. After one input source loses power, another input source takes over, and then each power module outputs power to the load to achieve uninterrupted operation. Description of the Drawings

[0012] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below.

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of the heat dissipation air duct of an embodiment of the present utility model;

[0015] Figure 3 It is a schematic electrical structure diagram of an embodiment of the present utility model. Detailed Embodiment

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model more clear, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0017] Please refer to Figures 1 - 3 As shown, a photovoltaic energy storage grid-connected and off-grid device includes a cabinet 1. Above the front side inside the cabinet 1, there are multiple battery packs 2. Below the front side of the cabinet 1 on the right side, there are an EMS energy management system 3, a high-voltage box 4, a DC / DC power module 5, and a PCS power module 6 in sequence. On the left side below the front side of the cabinet 1, there are also a first protection switch 8, a second protection switch 9, a third protection switch 10, and a fourth protection switch 11, and an STS switching power module 7 is also provided;

[0018] It further includes an electrical part. The STS switching power module 7 is connected to the mains end through the first protection switch 8, and is also connected to the load end through the second protection switch 9. The fourth protection switch 11 is arranged between the mains end and the load end. The STS switching power module 7 is sequentially connected to the battery pack 2 through the PCS power module 6, the DC / DC power module 5, and the high-voltage box 4. The EMS energy management system 3 is used to send control signals to the STS switching power module 7, the high-voltage box 4, the DC / DC power module 5, and the PCS power module 6.

[0019] In this embodiment, the PCS power module 6 is also connected to a photovoltaic end through the third protection switch 10.

[0020] Specifically, when the first protection switch 8 and the second protection switch 9 are turned on, the mains power supplies the load. When the mains power fails, the battery pack supplies the load after passing through the high-voltage box and two conversion modules. Or the third protection switch 10 is turned on, and the photovoltaic panel supplies the load.

[0021] Electrical connection and communication control are achieved among the components of the entire grid-connected and off-grid energy storage system, enabling power regulation under grid-free conditions to meet the uninterrupted operation of the load. The basic logic is as follows: in the off-grid state, when the STS detects a power failure in the grid, it feeds back the status to the EMS energy management 3 to cut off the STS module, and at the same time turns on the AC / DC module 6 to supply power to the load; in the grid-connected state, when the STS detects the grid power restoration, it feeds back the status to the EMS energy management 3, cuts off the AC / DC module 6, and at the same time closes the STS to supply power to the load; the photovoltaic PV access state is controlled by the EMS energy management 3 to determine when the photovoltaic energy charges the battery or supplies power to the AC / DC module 6, and then supplies power to the load. Uninterrupted power supply to the load from multiple energy sources such as the battery, photovoltaic, and grid is achieved.

[0022] In this embodiment, the cabinet 1 is further connected to a heat dissipation device 12. A fan 13 is provided inside the battery pack 2. The heat dissipation device 12 and the fan 13 cooperate to form an air duct to dissipate heat from the cabinet 1, which is used to take away the heat of the battery pack in the upper cabin.

[0023] The heat dissipation device 12 is located on one side of the rear door panel of the cabinet 1. Cold air is sent out from the heat dissipation device 12, passes through the back of the battery pack 2, and is extracted by the fan 13. The generated hot air flows back to the air return port of the heat dissipation device 12 from the upper half of the cabinet 1, and then circulates for heat dissipation.

[0024] Preferably, the heat dissipation device is an air conditioner. Cold air enters from the rear of the battery pack and is extracted by the fan of the battery pack. The hot air of multiple battery packs flows back to the air return port of the air conditioner from the upper cavity, and multiple battery packs are cooled by the air conditioner installed at the rear of the cabinet in a circulating manner.

[0025] The above are only the preferred embodiments of the present application and are not intended to limit the scope of implementation of the present application. Other embodiments with the same or similar principles and basic structures as the present application are within the protection scope of the present application.

Claims

1. A solar-storage off-grid device, characterized in that: It includes a cabinet (1), in which a plurality of battery packs (2) are provided above the front side. Below the front side of the cabinet (1) and on the right side, an EMS energy management system (3), a high-voltage box (4), a DC / DC power module (5), and a PCS power module (6) are successively provided. Below the front side of the cabinet (1) and on the left side, a first protection switch (8), a second protection switch (9), a third protection switch (10), and a fourth protection switch (11) are also provided, and an STS switching power module (7) is further provided. It further includes an electrical part. The STS switching power module (7) is connected to the mains end through the first protection switch (8), and is also connected to the load end through the second protection switch (9). The fourth protection switch (11) is provided between the mains end and the load end. The STS switching power module (7) is successively connected to the battery pack (2) through the PCS power module (6), the DC / DC power module (5), and the high-voltage box (4). The EMS energy management system (3) is used to send control signals to the STS switching power module (7), the high-voltage box (4), the DC / DC power module (5), and the PCS power module (6).

2. The hybrid AC / DC power generation and energy storage device according to claim 1, wherein: The PCS power module (6) is also connected to a photovoltaic end through the third protection switch (10).

3. The off-grid solar-storage device according to claim 1, characterized in that: The cabinet (1) is further connected to a heat dissipation device (12). A fan (13) is provided in the battery pack (2). The heat dissipation device (12) and the fan (13) cooperate to form an air duct to dissipate heat from the cabinet (1).

4. A photovoltaic energy storage grid-connected and off-grid device according to claim 3, characterized in that: The heat dissipation device (12) is located on one side of the rear door panel of the cabinet (1). Cold air is sent out from the heat dissipation device (12), passes through the back of the battery pack (2), and is drawn out by the fan (13). The generated hot air flows back to the air return port of the heat dissipation device (12) from the upper half of the cabinet (1), and then circulates for heat dissipation reciprocally.

5. The off-grid solar-storage device according to claim 1, characterized in that: The fourth protection switch (11) is horizontally arranged above, and the second protection switch (9), the first protection switch (8), and the third protection switch (10) are successively vertically arranged below the fourth protection switch (11).

Images