Energy storage device

Abstract

The utility model provides an energy storage device, and belongs to the technical field of energy storage. The energy storage device comprises three energy storage cabinets. According to the utility model, a common parallel operation wiring mode is abandoned, the middle energy storage cabinet is selected as the main cabinet, and the middle energy storage cabinet is respectively connected with the other two energy storage cabinets in parallel, so that the cost is reduced, the communication between the other two energy storage cabinets cannot influence each other, and when one of the other two energy storage cabinets goes wrong, the energy storage cabinet can be connected with the other energy storage cabinet in parallel. The communication of the other one of the other two energy storage cabinets is not abnormal, and the energy transfer of the other one of the other two energy storage cabinets is not affected, so that the maximum value of the energy storage cabinets can be exerted.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technology field, specifically to a kind of energy storage device. BACKGROUND

[0002] At present, energy storage integrated cabinet is widely concerned due to high integration, which can improve energy utilization and is convenient to install. In order to solve the high load power demand of users, suppliers often provide a parallel connection scheme of multiple machines. Referring to Figure 2 , the existing multiple machine parallel connection scheme selects the first energy storage integrated cabinet as the main machine, the second energy storage integrated cabinet is connected to the first energy storage integrated cabinet, and the third energy storage integrated cabinet is connected in parallel with the second energy storage integrated cabinet. The energy collected by the third energy storage integrated cabinet through photovoltaic needs to be transmitted to the first energy storage integrated cabinet through the second energy storage integrated cabinet. Each energy storage integrated cabinet is provided with a communication port. When the second energy storage integrated cabinet fails, the communication of the second energy storage integrated cabinet will show an abnormality, which will affect the energy transmission of the third energy storage integrated cabinet, so that the maximum value of the energy storage cabinet cannot be realized. At the same time, if the inverter AC output current of a single energy storage integrated cabinet is 50A, after the parallel connection of three energy storage integrated cabinets, the wiring between the second energy storage integrated cabinet and the first energy storage integrated cabinet needs to withstand a large current of 100A. The wiring terminal connected with the wiring also needs to withstand a large current of 100A, which has a high manufacturing cost. SUMMARY

[0003] The utility model aims at the deficiency of the prior art, and provides an energy storage device.

[0004] The utility model provides an energy storage device, which is characterized by comprising three energy storage cabinets. The energy storage cabinet in the middle is a main cabinet, which is connected to a power grid and a load. The energy storage cabinet in the middle is connected in parallel to the other two energy storage cabinets.

[0005] Further, the energy storage cabinet comprises a first energy storage connection row and a second energy storage connection row. The first energy storage connection row of the energy storage cabinet in the middle is connected to the load, and the second energy storage connection row of the energy storage cabinet in the middle is connected to the power grid.

[0006] Further, the first energy storage connection row and the second energy storage connection row are both copper rows.

[0007] Further, the energy storage cabinet further comprises a first power grid wiring terminal connected to the second energy storage connection row. The main cabinet is provided with at least two first power grid wiring terminals. The other two energy storage cabinets are provided with at least one first power grid wiring terminal. The two first power grid wiring terminals of the main cabinet are connected to one first power grid wiring terminal of the other two energy storage cabinets through wiring.

[0008] Further, characterized in that: the energy storage cabinet further comprises a first load terminal connected to the first energy storage connection row, the first load terminal on the main cabinet is at least two, and the first load terminal on the other two energy storage cabinets is at least one, and the two first load terminals of the main cabinet are connected to one first load terminal of the other two energy storage cabinets through wiring respectively.

[0009] Further, characterized in that: the energy storage cabinet further comprises an inverter, a second load terminal arranged on the inverter, and a second power grid terminal arranged on the inverter, the second load terminal is connected to the first energy storage connection row, and the second power grid terminal is connected to the second energy storage connection row.

[0010] Further, characterized in that: the energy storage cabinet further comprises a first photovoltaic terminal connectable to a photovoltaic panel and a second photovoltaic terminal arranged on the inverter, and the second photovoltaic terminal is connected to the first photovoltaic terminal.

[0011] Further, characterized in that: the energy storage cabinet further comprises a battery and a first electric energy terminal arranged on the inverter, and the first electric energy terminal is connected to the battery.

[0012] Further, characterized in that: the wiring between the other two energy storage cabinets and the main cabinet bears the same current.

[0013] Further, characterized in that: the first load terminal on all energy storage cabinets is two, and the first power grid terminal is two.

[0014] The energy storage device has the following beneficial effects:

[0015] The commonly used parallel machine wiring mode is abandoned, the middle energy storage cabinet is selected as the main cabinet, the middle energy storage cabinet is connected to the other two energy storage cabinets in parallel, the cost is reduced, the communication between the other two energy storage cabinets does not affect each other, when a problem occurs in one of the other two energy storage cabinets, the communication of the other one of the other two energy storage cabinets does not show abnormality, and the energy transmission of the other one of the other two energy storage cabinets is not affected, so that the maximum value of the energy storage cabinet can be played. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated into the specification and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In these drawings, like reference characters are used to denote like elements. The drawings in the following description are some embodiments of the present application, not all embodiments. For those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0017] Figure 1 A structure schematic view in the energy storage device of the utility model embodiment;

[0018] Figure 2 A structure schematic view in the prior art energy storage device.

[0019] In the figure: 1-energy storage cabinet, 11-first energy storage connecting row, 12-second energy storage connecting row, 13-first power grid wiring terminal, 14-first load wiring terminal, 15-inverter, 151-second power grid wiring terminal, 152-second load wiring terminal, 153-second photovoltaic wiring terminal, 154-first electric energy wiring terminal, 16-first photovoltaic wiring terminal, 17-battery, 2-power grid, 3-load. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any way without conflict.

[0021] Please refer to Figure 1 The energy storage device of the utility model embodiment comprises three energy storage cabinets 1, the energy storage cabinet 1 in the middle is a main cabinet, the main cabinet is connected to a power grid 2 and a load 3 respectively, and the energy storage cabinet 1 in the middle is connected to the other two energy storage cabinets 1 in parallel.

[0022] Here, the three energy storage cabinets 1 are arranged left, middle and right, the commonly used parallel connection wiring mode is abandoned, the middle cabinet is selected as the main cabinet, and the other two energy storage cabinets 1 are connected to the main cabinet energy storage cabinet 1 in parallel, so that when a problem occurs in one of the other two energy storage cabinets 1, the communication display of the energy storage cabinet 1 is abnormal, and the energy transmission of the other one of the other two energy storage cabinets 1 will not be affected.

[0023] The energy storage cabinet 1 can comprise a first energy storage connecting row 11 and a second energy storage connecting row 12, the first energy storage connecting row 11 of the energy storage cabinet 1 in the middle is connected to the load 3, and the second energy storage connecting row 12 of the energy storage cabinet 1 in the middle is connected to the power grid 2.

[0024] The first energy storage connecting row 11 and the second energy storage connecting row 12 can both be copper rows.

[0025] Specifically, the first energy storage connecting row 11 and the second energy storage connecting row 12 can be copper rows that can bear 150A current because the cost of copper rows is low.

[0026] The energy storage cabinet 1 can further include first grid connection terminals 13 connected to the second energy storage connecting row 12. The main cabinet has at least two first grid connection terminals 13, and the other two energy storage cabinets 1 have at least one first grid connection terminal 13. The two first grid connection terminals 13 of the main cabinet are connected to one first grid connection terminal 13 of the other two energy storage cabinets 1 through wires.

[0027] The energy storage cabinet 1 can further include first load connection terminals 14 connected to the first energy storage connecting row 11. The main cabinet has at least two first load connection terminals 14, and the other two energy storage cabinets 1 have at least one first load connection terminal 14. The two first load connection terminals 14 of the main cabinet are connected to one first load connection terminal 14 of the other two energy storage cabinets 1 through wires.

[0028] Specifically, the wires between adjacent cabinets only need to bear 50A current, and the first load connection terminals 14 and the first grid connection terminals 13 of the three energy storage cabinets 1 only need to bear 50A current, which reduces the cost of wires and connection terminals and greatly reduces the manufacturing cost of the energy storage cabinet 1.

[0029] The energy storage cabinet 1 can further include an inverter 15, a second load connection terminal 152 arranged on the inverter 15, and a second grid connection terminal 151 arranged on the inverter 15. The second load connection terminal 152 is connected to the first energy storage connecting row 11, and the second grid connection terminal 151 is connected to the second energy storage connecting row 12.

[0030] The energy storage cabinet 1 can further include a first photovoltaic connection terminal 16 connectable to a photovoltaic panel, and a second photovoltaic connection terminal 153 arranged on the inverter 15. The second photovoltaic connection terminal 153 is connected to the first photovoltaic connection terminal 16.

[0031] The energy storage cabinet 1 can further include a battery 17 and a first electrical energy connection terminal 154 arranged on the inverter 15. The first electrical energy connection terminal 154 is connected to the battery 17.

[0032] The wires between the other two energy storage cabinets 1 and the main cabinet can bear the same current.

[0033] Specifically, the wires between the other two energy storage cabinets 1 and the main cabinet can bear 50A current.

[0034] All the first load connection terminals 14 of the energy storage cabinets 1 can be two, and all the first grid connection terminals 13 can be two.

[0035] Specifically, the three energy storage cabinets 1 are the same in structure, and the specifications of the connection terminals are also the same, and the three energy storage cabinets 1 share one set of IDBOM, and the manufacturer does not need to provide three energy storage cabinets 1 with different IDBOMs for parallel connection customers, and the IDBOM refers to a table of all materials including all structural parts and electronic parts, and as long as the structural parts such as the connection terminals are different, the IDBOM is different.

[0036] Specifically, the consistency of the structures of the three energy storage cabinets 1 is ensured, the user does not need to consider the line sequence problem of the parallel connection between the three energy storage cabinets 1, and only needs to select the middle cabinet as the main cabinet when selecting the main cabinet, thereby improving the customer experience, providing convenience for production, and saving time for customers.

[0037] The above-described content can be implemented alone or in various combinations, and these variants are within the protection scope of the utility model.

[0038] It should be noted that in the description of the present application, the terms "upper end", "lower end", "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0039] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage device, characterized in that: It includes three energy storage cabinets (1), the middle energy storage cabinet (1) is the main cabinet, the main cabinet is connected to the power grid (2) and the load (3) respectively; the middle energy storage cabinet (1) is connected in parallel to the other two energy storage cabinets (1).

2. The energy storage device as described in claim 1, characterized in that: The energy storage cabinet (1) includes a first energy storage connection bar (11) and a second energy storage connection bar (12). The first energy storage connection bar (11) of the energy storage cabinet (1) located in the middle is connected to the load (3), and the second energy storage connection bar (12) of the energy storage cabinet (1) located in the middle is connected to the power grid (2).

3. The energy storage device as described in claim 2, characterized in that: Both the first energy storage connection bus (11) and the second energy storage connection bus (12) are copper busbars.

4. An energy storage device as described in claim 2 or 3, characterized in that: The energy storage cabinet (1) also includes a first grid terminal (13) connected to the second energy storage connection bar (12). There are at least two first grid terminals (13) on the main cabinet and at least one first grid terminal (13) on the other two energy storage cabinets (1). The two first grid terminals (13) of the main cabinet are respectively connected to one first grid terminal (13) on the other two energy storage cabinets (1) by wiring.

5. An energy storage device as described in claim 4, characterized in that: The energy storage cabinet (1) further includes a first load terminal (14) connected to the first energy storage connection bar (11). There are at least two first load terminals (14) on the main cabinet and at least one first load terminal (14) on the other two energy storage cabinets (1). The two first load terminals (14) of the main cabinet are respectively connected to one first load terminal (14) on the other two energy storage cabinets (1) by wiring.

6. An energy storage device as described in claim 2 or 3, characterized in that: The energy storage cabinet (1) also includes an inverter (15), a second load terminal (152) disposed on the inverter (15), and a second grid terminal (151) disposed on the inverter (15). The second load terminal (152) is connected to the first energy storage connection bar (11), and the second grid terminal (151) is connected to the second energy storage connection bar (12).

7. An energy storage device as described in claim 6, characterized in that: The energy storage cabinet (1) also includes a first photovoltaic terminal (16) that can be connected to the photovoltaic panel and a second photovoltaic terminal (153) disposed on the inverter (15), wherein the second photovoltaic terminal (153) is connected to the first photovoltaic terminal (16).

8. An energy storage device as described in claim 6, characterized in that: The energy storage cabinet (1) also includes a battery (17) and a first power terminal (154) disposed on the inverter (15), the first power terminal (154) being connected to the battery (17).

9. An energy storage device as described in claim 1, 2, or 3, characterized in that: The wiring between the other two energy storage cabinets (1) and the main unit cabinet carries the same current.

10. An energy storage device as described in claim 5, characterized in that: All energy storage cabinets (1) have two first load terminals (14) and two first grid terminals (13).

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