A light storage and charging integrated box with photovoltaic, power grid and energy storage multi-power access

Abstract

The utility model belongs to photovoltaic power supply technical field, concretely relates to a kind of light storage and charging integrated box with photovoltaic, power grid, energy storage multi-power access, including box and fixed in the direct current confluence module, ac distribution module, energy storage control module of box;Box surface is fixed with direct current confluence interface, ac distribution interface, energy storage control interface.The utility model combines direct current confluence box and ac distribution box as a whole, simultaneously also has the power control demand of photovoltaic electricity, power grid and energy storage battery multi-power to the same load end, can greatly reduce the volume of overall use box, adopt simple and compact layout mode, more convenient in use, and greatly improve space utilization and layout aesthetic degree, while greatly save component and box excess cost and the working hour cost generated when product production in a large aspect.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic power supply technology, specifically relating to a photovoltaic, power grid, and energy storage integrated charging box with multiple power sources including photovoltaic, power grid, and energy storage. Background Technology

[0002] With the popularization of new energy technologies and the diversification of electricity demand, integrated photovoltaic-storage-charging systems are increasingly widely used in distributed energy, emergency power supply, and home energy storage. Currently, traditional photovoltaic-storage-charging systems typically consist of multiple independent modules, including photovoltaic modules, energy storage batteries, hybrid inverters, grid input, and load terminals. These modules are connected via external wiring or distributed distribution boxes. However, existing technologies generally have certain limitations: in traditional solutions, the connection of multiple power sources, such as the grid, photovoltaics, and energy storage, requires multiple independent devices. Photovoltaics, energy storage, and the grid need to be connected through independent power input ports, requiring separate photovoltaic combiner boxes, AC distribution boxes, and energy storage distribution boxes, resulting in low overall utilization and complex wiring structures. This leads to complex and diverse equipment, high installation and maintenance costs, and difficulty in meeting the needs of miniaturized application scenarios. Furthermore, the lack of electrical isolation between AC and DC current poses a leakage safety hazard. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and to provide a photovoltaic, energy storage and charging integrated box with access to multiple power sources including photovoltaic, grid and energy storage.

[0004] The technical solution adopted by this utility model is as follows: a photovoltaic, power grid and energy storage integrated box with multiple power supply access, including box body and DC combiner module, AC power distribution module and energy storage control module fixed in the box body;

[0005] The surface of the enclosure is fixed with a DC combiner interface, an AC power distribution interface, and an energy storage control interface.

[0006] The DC combiner module includes a photovoltaic DC switching unit and a photovoltaic DC surge protector.

[0007] The AC power distribution module includes a grid-connected AC switch unit, a grid-connected residual current device (RCD), an off-grid AC switch unit, an off-grid RCD, a grid AC switch unit, and an AC surge protector.

[0008] The AC power distribution module includes two contactors.

[0009] The energy storage control module includes an energy storage DC switch unit.

[0010] The enclosure includes a bottom shell, an inner door panel, and an outer door panel. The inner door panel has a window. The bottom shell and the inner door panel are connected. The DC combiner module, AC power distribution module, and energy storage control module are fixed in the cavity between the bottom shell and the inner door panel and are operated and indicated through the window. The outer door panel can be opened and closed outside the inner door panel to expose / cover the window.

[0011] A bracket is fixed inside the box. The bracket includes a support plate and support feet located on both sides below the support plate. The lower ends of the support feet are connected to the bottom of the box. The support plate divides the inner cavity of the box into a component mounting chamber above the support plate and a wire passage chamber below the support plate. The support plate is provided with wire passage grooves.

[0012] A first partition is fixed above the support plate, which divides the component mounting chamber into a DC mounting chamber and an AC mounting chamber. The DC combiner module and the energy storage control module are fixed in the DC mounting chamber, and the AC power distribution module is fixed in the AC mounting chamber. A second partition is fixed below the support plate at a position corresponding to the first partition.

[0013] The first guide rail and the second guide rail are fixed above the support plate. The first guide rail and the second guide rail are arranged in parallel and their extension direction is perpendicular to the surface of the first partition. The first partition has two through holes for the first guide rail and the second guide rail to pass through respectively. The components of the DC combiner module and the energy storage control module are fixed in two rows on the first guide rail and the second guide rail located in the DC mounting cavity. The components of the AC power distribution module are fixed in two rows on the first guide rail and the second guide rail located in the AC mounting cavity.

[0014] The inner door panel is provided with a first window and a second window corresponding to the first guide rail and the second guide rail, respectively.

[0015] The first window, corresponding to the DC mounting cavity and the AC mounting cavity, respectively constitutes a DC operation area and an AC display area. The DC operation area is used for the operation of components of the DC combiner module and the energy storage control module. The second window, corresponding to the DC mounting cavity and the AC mounting cavity, respectively constitutes a DC display area and an AC operation area. The AC operation area is used for the operation of components of the AC power distribution module.

[0016] The beneficial effects of this utility model are as follows: This utility model combines a DC combiner box and an AC distribution box into one unit, and at the same time, it meets the power control requirements of multiple power sources such as photovoltaic power, power grid and energy storage battery on the same load end. It can greatly reduce the overall box size, adopt a simple and compact layout, make the use process more convenient, and greatly improve the space utilization and layout aesthetics. At the same time, it saves a lot of unnecessary costs of components and boxes, as well as labor costs incurred during product production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a hidden outer door panel according to an embodiment of the present invention;

[0020] Figure 3 This is a structural schematic diagram of a hidden outer door panel and inner door panel according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the component distribution inside the box in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the external interface distribution of the housing in one embodiment of the present invention;

[0023] Figure 6 This is a wiring diagram of a DC bus module in one embodiment of the present invention;

[0024] Figure 7 This is a wiring diagram of the energy storage control module in one embodiment of the present invention;

[0025] Figure 8 This is a wiring diagram of the AC power distribution module in one embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the assembly structure of the box body and the supporting partition assembly according to one embodiment of the present invention;

[0027] Figure 10 This is an exploded view of the structure of the box body and the supporting partition assembly in one embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the structure of a bracket according to one embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0031] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, and surface, are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0032] like Figures 1-3 As shown, this utility model discloses a photovoltaic, power grid, and energy storage integrated charging box with multiple power supply access, including a box body and a DC combiner module, an AC power distribution module, and an energy storage control module fixed inside the box body; the surface of the box body is fixed with a DC combiner interface, an AC power distribution interface, and an energy storage control interface.

[0033] like Figure 4 As shown, in this embodiment, the components of the DC combiner module include photovoltaic DC switch units QF6 and QF7 and photovoltaic DC surge protectors SPD1 and SPD2; the components of the energy storage control module include energy storage DC switch unit QF4; and the components of the AC distribution module include off-grid AC switch unit QF1, off-grid leakage current protection device QF2, grid-connected AC switch unit QF3, grid-connected leakage current protection device QF4, grid AC switch unit QF5, AC surge protector SPD3, and two contactors KM1 and KM2.

[0034] The DC combiner interface includes four DC input interfaces IN1+, IN1-, IN2+, and IN2-, and four DC output interfaces OUT1(+), OUT1(-), OUT2(+), and OUT2(-). During wiring, the DC input interfaces IN1+, IN1-, IN2+, and IN2- are connected to the photovoltaic string (Stirring), and the DC output interfaces OUT1(+), OUT1(-), OUT2(+), and OUT2(-) are connected to the inverter. The interfaces are connected via an internal DC combiner module. Figure 6 As shown, the photovoltaic DC switching units QF6 and QF7 on the line are used to control the switching on and off of photovoltaic power supply, and the photovoltaic DC surge protectors SPD1 and SPD2 are used to provide surge protection such as lightning protection for photovoltaic string power supply.

[0035] The energy storage control interface includes two energy storage input interfaces, Battery+ and Battery-, and two energy storage output interfaces, BAT+ and BAT-. During wiring, these are connected to the inverter and the energy storage battery, respectively. The interfaces are connected to each other via the internal energy storage control module. Figure 7 As shown, the energy storage DC switch unit QF8 on the line is used to control the on / off state of energy storage charging and discharging.

[0036] The AC power distribution interface includes four waterproof connectors PG21 and one grounding connector PG13.5. During wiring, the four waterproof connectors PG21 are used to connect to the inverter's off-grid, inverter grid-connected, grid, and load, respectively. The interfaces are connected via an internal AC power distribution module. Figure 8 As shown, the inverter's off-grid input (Inverter Off-Grid L / N) is connected to the subsequent circuit via off-grid AC switch unit QF1 and off-grid leakage current protection device QF2. QF1 and QF2 provide on / off control and short-circuit and overload protection. The inverter's grid-connected input (Inverter Grid L / N) is connected via grid-connected AC switch unit QF3 and grid-connected leakage current protection device QF4. Similarly, QF3 and QF4 provide circuit protection and on / off control. The grid input (Grid L / N) is connected to the subsequent circuit via grid AC switch unit QF5. QF5 provides on / off control and is equipped with an AC surge protector SPD3 to suppress surge overvoltages such as lightning strikes and protect the equipment. This allows for the supply of power to the same load from multiple sources: photovoltaic power, grid power, and energy storage batteries. Two AC contactors, KM1 and KM2, form an interlocking switching circuit to ensure that off-grid and grid-connected power supply modes do not conduct simultaneously, avoiding power supply conflicts.

[0037] Through the switching actions of each component in this embodiment, the photovoltaic panels can be used to generate electricity to supply power to the load under sunny conditions. Excess electricity is stored and charged via the inverter. Furthermore, when photovoltaic power generation is insufficient, the inverter's energy storage battery and grid power can be used to continuously supply power to the load. Each component operates independently.

[0038] In this embodiment, such as Figure 1-3The enclosure includes a bottom shell 110, an inner door panel 120, and an outer door panel 130. The inner door panel 120 has a window. The bottom shell 110 and the inner door panel 120 are connected. The DC combiner module, AC power distribution module, and energy storage control module are fixed within the cavity between the bottom shell 110 and the inner door panel 120 and are operated and indicated through the window. The outer door panel 130 is openable and closable outside the inner door panel 120 to expose / cover the window. A sealing groove 111 is provided on the outer periphery of the bottom shell 110 for embedding an annular seal, ensuring a reliable seal between the outer door panel 130 and the bottom shell 110 when closed, achieving safety protection, dustproofing, and moisture prevention. Specifically, one side of the outer door panel 130 is hinged to the bottom shell 110, and the other side can be detachably and fixedly connected via fasteners or padlocks. The inner door panel 120 is connected to the bottom shell 110, providing protection for the internal components and exposing only the operating and indicating parts for the operator to observe and operate. The inner door panel 120 and the bottom shell 110 are connected in a detachable manner, facilitating the inspection and maintenance of the internal wiring. Specifically, one side of the inner door panel 120 is hinged to the bottom shell 110, and the other side can be detached and fixedly connected via fasteners or padlocks.

[0039] like Figures 9-11 As shown, a bracket 200 is fixed inside the enclosure. The bracket 200 includes a support plate 210 and support feet 220 located on both sides below the support plate 210. The lower ends of the support feet 220 are connected to the bottom of the enclosure. The support plate 210 divides the internal cavity of the enclosure into a component mounting chamber above the support plate 210 and a cable routing chamber below the support plate 210. The support plate 210 is provided with cable routing grooves 211. This facilitates cable routing, makes the internal layout structure clearer, makes the use process more convenient, and greatly improves space utilization and layout aesthetics.

[0040] Furthermore, a first partition 310 is fixed above the support plate 210, dividing the component mounting chamber into a DC mounting chamber and an AC mounting chamber. The DC combiner module and energy storage control module are fixed in the DC mounting chamber, and the AC power distribution module is fixed in the AC mounting chamber. A second partition 320 is fixed below the support plate 210 at a position corresponding to the first partition 310. The arrangement of the first partition 310 and the second partition 320 achieves an electrical isolation mounting structure between AC and DC, facilitating installation, disassembly, and maintenance. Specifically, the first partition 310 and the second partition 320 are made of polycarbonate sheet.

[0041] The support plate 210 is fixed with a first guide rail 410 and a second guide rail 420. The first guide rail 410 and the second guide rail 420 are arranged parallel to each other and extend perpendicularly to the surface of the first partition 310. The first partition 310 has two through holes 311 for the first guide rail 410 and the second guide rail 420 to pass through. The components of the DC combiner module and the energy storage control module are fixed in two rows on the first guide rail 410 and the second guide rail 420 located in the DC mounting cavity. The components of the AC power distribution module are fixed in two rows on the first guide rail 410 and the second guide rail 420 located in the AC mounting cavity. The inner door panel 120 is provided with a first window 121 and a second window 122 corresponding to the first guide rail 410 and the second guide rail 420, respectively. This achieves a compact layout design and efficient space utilization.

[0042] The first window 121, corresponding to the DC mounting cavity and the AC mounting cavity, respectively constitutes a DC operation area and an AC display area. The DC operation area is used for the operation of components of the DC combiner module and the energy storage control module. The second window 122, corresponding to the DC mounting cavity and the AC mounting cavity, respectively constitutes a DC display area and an AC operation area. The AC operation area is used for the operation of components of the AC power distribution module.

[0043] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A photovoltaic, energy storage, and charging integrated box with access to multiple power sources including photovoltaic, grid, and energy storage, characterized in that, It includes the enclosure and the DC combiner module, AC power distribution module, and energy storage control module fixed inside the enclosure; The surface of the enclosure is fixed with a DC combiner interface, an AC power distribution interface, and an energy storage control interface.

2. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 1, characterized in that: The DC combiner module includes a photovoltaic DC switching unit (QF6, QF7) and a photovoltaic DC surge protector (SPD1, SPD2).

3. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 1, characterized in that: The AC power distribution module includes an off-grid AC switch unit (QF1), an off-grid residual current device (QF2), a grid-connected AC switch unit (QF3), a grid-connected residual current device (QF4), a grid AC switch unit (QF5), and an AC surge protector (SPD3).

4. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 3, characterized in that: The AC power distribution module includes two contactors (KM1, KM2), which are used to form an interlocking switching circuit.

5. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 1, characterized in that: The energy storage control module includes an energy storage DC switching unit (QF8).

6. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) according to any one of claims 1-5, characterized in that: The enclosure includes a bottom shell (110), an inner door panel (120), and an outer door panel (130). The inner door panel (120) is provided with a window. The bottom shell (110) and the inner door panel (120) are connected. The DC combiner module, AC power distribution module, and energy storage control module are fixed in the cavity between the bottom shell (110) and the inner door panel (120) and are operated and indicated through the window. The outer door panel (130) can be opened and closed outside the inner door panel (120) to expose / cover the window.

7. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 6, characterized in that: A bracket (200) is fixed inside the box. The bracket (200) includes a support plate (210) and support feet (220) located on both sides below the support plate (210). The lower ends of the support feet (220) are connected to the bottom of the box. The support plate (210) divides the inner cavity of the box into a component mounting chamber above the support plate (210) and a wire passage chamber below the support plate (210). The support plate (210) is provided with a wire passage groove (211).

8. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 7, characterized in that: A first partition (310) is fixed above the support plate (210). The first partition (310) divides the component mounting chamber into a DC mounting chamber and an AC mounting chamber. The DC combiner module and the energy storage control module are fixed in the DC mounting chamber, and the AC power distribution module is fixed in the AC mounting chamber. A second partition (320) is fixed below the support plate (210) at a position corresponding to the first partition (310).

9. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 8, characterized in that: The first guide rail (410) and the second guide rail (420) are fixed above the support plate (210). The first guide rail (410) and the second guide rail (420) are arranged in parallel and their extension direction is perpendicular to the surface of the first partition plate (310). The first partition plate (310) is provided with two through holes (311) for the first guide rail (410) and the second guide rail (420) to pass through respectively. The components of the DC combiner module and the energy storage control module are fixed in two rows on the first guide rail (410) and the second guide rail (420) located in the DC mounting cavity. The components of the AC power distribution module are fixed in two rows on the first guide rail (410) and the second guide rail (420) located in the AC mounting cavity. The inner door panel (120) is provided with a first window (121) and a second window (122) corresponding to the first guide rail (410) and the second guide rail (420), respectively.

10. The photovoltaic-storage-charging integrated box with multiple power source access (photovoltaic, grid, and energy storage) as described in claim 9, characterized in that: The first window (121) and the corresponding positions of the DC mounting cavity and the AC mounting cavity respectively constitute a DC operation area and an AC display area. The DC operation area is used for the operation of components of the DC combiner module and the energy storage control module. The second window (122) and the corresponding positions of the DC mounting cavity and the AC mounting cavity respectively constitute a DC display area and an AC operation area. The AC operation area is used for the operation of components of the AC power distribution module.

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