Energy storage device

Abstract

The utility model provides an energy storage device which comprises an inverter and a battery module composed of a plurality of battery boxes, and the battery module is located below the inverter. Wherein the inverter is in direct-current cable connection with one battery box in the battery module, so that the inverter and the corresponding battery box form direct-current side connection electrification; in the battery module, the battery boxes are in direct-current cable connection through the battery box direct-current power source positive electrode and the battery box direct-current power source negative electrode, so that the battery boxes in the battery module form current parallel connection, and the battery capacity of the energy storage device is expanded. According to the utility model, the characteristics of user energy storage products can be fully utilized, and the low-voltage off-grid integrated household energy storage device can be rapidly formed through the structural design scheme of modular design and stacked installation. The energy storage device provided by the utility model can improve the degree of self-generation and self-use of household photovoltaic power, reduce the electric charge expenditure of users, and ensure the stability of power utilization of the users under the conditions of extreme weather and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage, in particular to a low-voltage off-grid integrated household energy storage device. Background Art

[0002] Household energy storage systems are usually installed in combination with household photovoltaic systems to provide electricity to household users. During the day, the electricity generated by the photovoltaic system is used first for local loads, and the excess energy is stored in the battery, which can be selectively connected to the grid when there is still surplus electricity; at night, when the photovoltaic system cannot generate electricity, the battery discharges to provide electricity for local loads.

[0003] However, compared with the power generation side / grid side / commercial and industrial energy storage above the megawatt-hour level, household energy storage has a smaller installed capacity, usually at the 10kWh level. Moreover, the technical route for household energy storage is also different from that of large-scale energy storage. It usually adopts an electrochemical energy storage route with flexible installed capacity, mature industrial chain, easy mass production and promotion, and simple installation and operation. Therefore, how to quickly form a household energy storage device is an urgent problem to be solved. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an energy storage device for solving the problem of how to quickly assemble a household energy storage device.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides an energy storage device, which includes: an inverter, a battery module composed of a plurality of battery boxes, and the battery module is located below the inverter;

[0006] The inverter is connected to one of the battery boxes in the battery module by a DC cable, so that the inverter forms a DC side connection with the corresponding battery box and is energized;

[0007] In the battery module, the battery boxes are connected to each other by DC cables through the positive pole of the DC power supply of the battery box and the negative pole of the DC power supply of the battery box, so that the battery boxes in the battery module form current parallel connection to expand the battery capacity of the energy storage device.

[0008] Optionally, the inverter is connected to the positive pole of the DC power supply of the target battery box by a DC cable through the positive pole of the DC power supply of the inverter, and the inverter is connected to the negative pole of the DC power supply of the target battery box by a DC cable through the negative pole of the DC power supply of the inverter, so that the inverter and the target battery box form a DC side connection and are energized; wherein the target battery box is a battery box in the battery module.

[0009] Optionally, the multiple battery boxes of the battery module are distributed in multiple layers, and each layer includes at least one battery box.

[0010] Optionally, the current layer battery box is connected to the positive pole of the DC power supply of the battery box of the lower layer by a DC cable through the positive pole of the DC power supply of the battery box, and the current layer battery box is connected to the negative pole of the DC power supply of the battery box of the lower layer by a DC cable through the negative pole of the DC power supply of the battery box, so that the current layer battery box and the lower layer battery box form a current parallel connection.

[0011] Optionally, an inverter outer cover plate is further provided on the outer side of the inverter, and the inverter outer cover plate is used to perform electrical isolation protection on the inverter;

[0012] And / or, a battery box outer cover plate is also provided on the outer side of the battery box, and the battery box outer cover plate is used to electrically isolate and protect the battery box.

[0013] Optionally, the inverter further includes:

[0014] Inverter AC output terminal, used for AC load output;

[0015] and / or, a photovoltaic input of an inverter for charging a battery module through photovoltaic power generation so that the battery module stores electricity;

[0016] And / or, the inverter AC mains input is used to charge the battery module through the mains so that the battery module stores electricity.

[0017] Optionally, the energy storage device further includes:

[0018] Connecting piece, used for fixed connection between inverter and battery box, and between battery boxes;

[0019] and / or, connecting fasteners for fixedly connecting the inverter to the battery box, the battery boxes to the battery boxes, and the battery module to the external structure;

[0020] and / or, expansion bolts, for passing through connecting fasteners to fix the energy storage device to an external structure;

[0021] And / or, a connector, used for fixedly connecting the battery box and the base.

[0022] Optionally, the energy storage device further includes:

[0023] Communication line, used for signal transmission between the inverter and the battery box, and between battery boxes;

[0024] And / or, a GPRS module, used for GPRS remote control and signal transmission of the energy storage device.

[0025] Optionally, the energy storage device further includes: a base, which is located below the battery module and is used to isolate the battery module from the ground.

[0026] Optionally, the energy storage device further comprises: positioning bumps for positioning between the inverter and the battery box, between the battery boxes, and between the battery boxes and the base.

[0027] As described above, the utility model provides an energy storage device having the following beneficial effects: it can make full use of the characteristics of user energy storage products, and realize the rapid formation of a low-voltage off-grid integrated household energy storage device through a modular design and a stacked installation structural design. The energy storage device provided by the utility model can improve the degree of self-generation and self-use of household photovoltaics, reduce the user's electricity bill expenditure, and ensure the stability of user electricity consumption under extreme weather conditions. For users in areas with high electricity prices, peak-valley price differences, or old power grids, the purchase of energy storage devices has better economic benefits, and household users have the motivation to purchase energy storage devices. In addition, by using energy storage devices in conjunction with household photovoltaics, electricity demand and resource distribution can be dispersed, thereby enhancing the development space of the energy storage market industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of an energy storage device provided by an embodiment;

[0029] Figure 2 for Figure 1 Left view of

[0030] Figure 3 for Figure 1 Right view of;

[0031] Figure 4 for Figure 1 A top view of

[0032] Figure 5 A schematic diagram of the structure and electrical connection of an inverter and a battery module provided in an embodiment;

[0033] Figure 6 for Figure 5 Left view of

[0034] Figure 7 for Figure 5 Right view of;

[0035] Figure 8 for Figure 5 A top view of

[0036] Fig. 9 A schematic diagram of the positioning connection structure of an inverter and a battery module provided by an embodiment;

[0037] Fig.10 for Fig. 9 Schematic diagram of some structures in . Description of the drawings:

[0039] 1-inverter, 2-battery module, 3-base, 4-battery outer cover plate, 5-inverter outer cover plate, 6-connecting plate, 7-connecting fasteners, 8-expansion bolts, 9-connecting parts, 10-inverter DC power positive pole, 11-inverter DC power negative pole, 12-battery box upper row DC power positive pole, 13-battery box upper row DC power negative pole, 14-battery box lower row DC power negative pole, 15-battery box lower row DC power positive pole, 16-inverter AC output terminal, 17-inverter photovoltaic input, 18-inverter AC mains input, 19-communication line, 21-GPRS module, 20-positioning bump package. DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0041] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0042] See also Figures 1 to 4 As shown, this embodiment provides an energy storage device, including: an inverter 1, a battery module 2 composed of a plurality of battery boxes, and the battery module 2 is located below the inverter 1. The inverter 1 is connected to one of the battery boxes in the battery module 2 by a DC cable, so that the inverter 1 and the corresponding battery box are connected on the DC side and energized; in the battery module 2, the battery boxes are connected to each other by a DC cable through the positive pole of the battery box DC power supply and the negative pole of the battery box DC power supply, respectively, so that the battery boxes in the battery module 2 are current-connected in parallel, so as to expand the battery capacity of the energy storage device. In this embodiment, an inverter outer cover plate 5 is further provided on the outside of the inverter 1, and the inverter outer cover plate 5 is used to electrically isolate and protect the inverter 1; a battery box outer cover plate 4 is further provided on the outside of the battery box, and the battery box outer cover plate 4 is used to electrically isolate and protect the battery box. In addition, as Figures 1 to 4 As shown, the energy storage device further includes a base 3, which is located below the battery module 2 and is used to isolate the battery module 2 from the ground. Figures 1 to 4 As shown, the display screen inverter 1 is placed at the top of the energy storage device to facilitate user operation and viewing of application data; the expandable battery module 2 is placed under the inverter to ensure that the center of gravity is lowered, which is beneficial to the stability and scalability of the device; the base 3 is placed at the bottom of the all-in-one device to isolate the battery module from splashing water on the ground; the battery outer cover plate 4 and the inverter outer cover plate 5 are used for electrical isolation protection to prevent users from accidentally touching the electrical wiring.

[0043] According to the above records, in an exemplary embodiment, the inverter 1 is connected to the battery box DC power positive pole of the target battery box by a DC cable through the inverter DC power positive pole 10, and the inverter 1 is connected to the battery box DC power negative pole of the target battery box by a DC cable through the inverter DC power negative pole 11, so that the inverter 1 and the target battery box form a DC side connection and are energized; wherein the target battery box is a battery box in the battery module 2.

[0044] According to the above records, in an exemplary embodiment, it is characterized in that the multiple battery boxes of the battery module 2 are distributed in multiple layers, and each layer includes at least one battery box. Among them, the battery box of the current layer is connected to the positive pole of the DC power supply of the battery box of the lower layer by a DC cable through the positive pole of the DC power supply of the battery box, and the battery box of the current layer is connected to the negative pole of the DC power supply of the battery box of the lower layer by a DC cable through the negative pole of the DC power supply of the battery box, so that the battery box of the current layer and the battery box of the lower layer are connected in parallel with each other. For example, the battery box of the upper layer and the battery box of the lower layer can be connected by DC cables through the positive pole of the DC power supply of the battery box and the negative pole of the DC power supply of the battery box, respectively, so that the battery boxes in the battery module 2 are connected in parallel with each other, and the battery capacity of the energy storage device is expanded.

[0045] According to the above records, if Figures 5 to 8As shown, if the multiple battery boxes are distributed in two layers, the inverter 1 is connected to the upper row of DC power positive poles 12 of the battery box of the first layer through the inverter DC power positive pole 10, and the inverter 1 is connected to the upper row of DC power negative poles 13 of the battery box of the first layer through the inverter DC power negative pole 11, so that the inverter 1 and the first layer of battery boxes are connected to the DC side and powered. In addition, the first layer of battery boxes are connected to the upper row of DC power positive poles 12 of the battery box of the second layer through the battery box lower row of DC power positive poles 15, and the first layer of battery boxes are connected to the upper row of DC power negative poles 13 of the battery box of the second layer through the battery box lower row of DC power negative poles 14, so that the battery boxes in the battery module 2 are connected in parallel with the current, and the battery capacity of the energy storage device is expanded; wherein, the first layer of battery boxes is located below the inverter and above the second layer of battery boxes, and the second layer of battery boxes is located above the base 3.

[0046] In an exemplary embodiment, if Figure 6 and Figure 7 As shown, the inverter 1 also includes: an inverter AC output terminal 16, which is used for AC load output; an inverter photovoltaic input 17, which is used to charge the battery module 2 through photovoltaic power generation so that the battery module 2 stores electricity; an inverter AC mains input 18, which is used to charge the battery module 2 through the mains so that the battery module 2 stores electricity, thereby forming a complete system for charging and discharging a low-voltage off-grid integrated household energy storage device.

[0047] In an exemplary embodiment, if Figure 6 As shown, the energy storage device also includes: a connecting piece 6, which is used for fixing the inverter and the battery box, and the battery boxes and the battery boxes; a connecting fastener 7, which is used for fixing the inverter and the battery box, the battery boxes and the battery boxes, and the battery module 2 and the external structure; an expansion bolt 8, which is used to pass through the connecting fastener 7 to fix the energy storage device and the external structure to ensure the stable installation of the overall device; a connecting piece 9, which is used for fixing the battery box and the base to ensure the integrated connection of the base and the battery box. As an example, the external structure in this embodiment can be a wall.

[0048] In an exemplary embodiment, if Figure 5 and Figure 6 As shown, the energy storage device also includes: a communication line 19 for signal transmission between the inverter and the battery box, and between the battery boxes; a GPRS module 21 for GPRS remote control and signal transmission of the energy storage device.

[0049] In an exemplary embodiment, if Fig.10As shown, the energy storage device also includes: a positioning concave-convex package 20, which is used for positioning and matching between the inverter and the battery box, between the battery boxes, and between the battery box and the base 3.

[0050] In summary, the utility model provides an energy storage device that can make full use of the characteristics of user energy storage products, and can quickly form a low-voltage off-grid integrated household energy storage device through modular design and stacked installation structural design. The energy storage device provided by the utility model can improve the degree of self-generation and self-use of household photovoltaics, reduce the user's electricity bill expenditure, and ensure the stability of user electricity consumption under extreme weather conditions. For users in areas with high electricity prices, peak-valley price differences, or old power grids, purchasing energy storage devices has better economic benefits, and household users have the motivation to purchase energy storage devices. In addition, by using energy storage devices in conjunction with household photovoltaics, electricity demand and resource distribution can be dispersed, thereby enhancing the development space of the energy storage market industry.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

[0052] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0053] It should be understood that, although the terms first, second, etc. may be used to describe battery boxes, etc. in the embodiments of the present invention, these battery boxes should not be limited to these terms. These terms are only used to distinguish battery boxes from each other. For example, without departing from the scope of the embodiments of the present invention, the first battery box may also be referred to as the second battery box, and similarly, the second battery box may also be referred to as the first battery box.

Claims

1. An energy storage device, It is characterized in that The energy storage device comprises: an inverter (1), a battery module (2) composed of a plurality of battery boxes, and the battery module (2) is located below the inverter (1); The inverter (1) is connected to one of the battery boxes in the battery module (2) via a DC cable, so that the inverter (1) and the corresponding battery box form a DC side connection and are energized; In the battery module (2), the battery boxes are connected to each other by DC cables via the positive pole of the DC power supply of the battery box and the negative pole of the DC power supply of the battery box, respectively, so that the battery boxes in the battery module (2) form a current parallel connection, thereby expanding the battery capacity of the energy storage device.

2. The energy storage device according to claim 1, It is characterized in that The inverter (1) is connected to the positive pole of the DC power supply of the target battery box by a DC cable via the positive pole of the DC power supply of the inverter (10), and the inverter (1) is connected to the negative pole of the DC power supply of the target battery box by a DC cable via the negative pole of the DC power supply of the inverter (11), so that the inverter (1) and the target battery box are connected on the DC side and energized; wherein the target battery box is a battery box in the battery module (2).

3. The energy storage device according to claim 1 or 2, It is characterized in that The multiple battery boxes of the battery module (2) are distributed in multiple layers, and each layer includes at least one battery box.

4. The energy storage device according to claim 3, It is characterized in that The current layer battery box is connected to the positive pole of the DC power supply of the battery box of the lower layer by a DC cable through the positive pole of the DC power supply of the battery box, and the current layer battery box is connected to the negative pole of the DC power supply of the battery box of the lower layer by a DC cable through the negative pole of the DC power supply of the battery box, so that the current layer battery box and the lower layer battery box form a current parallel connection.

5. The energy storage device according to claim 1, It is characterized in that An inverter outer cover plate (5) is also provided on the outer side of the inverter (1), and the inverter outer cover plate (5) is used to perform electrical isolation protection on the inverter (1); And / or, a battery box outer cover plate (4) is also provided on the outer side of the battery box, and the battery box outer cover plate (4) is used to electrically isolate and protect the battery box.

6. The energy storage device according to claim 1 or 2, It is characterized in that The inverter (1) further comprises: Inverter AC output terminal (16), used for AC load output; and / or, an inverter photovoltaic input (17) for charging the battery module (2) through photovoltaic power generation, so that the battery module (2) stores electricity; And / or, the inverter AC mains input (18) is used to charge the battery module (2) via the mains, so that the battery module (2) stores electricity.

7. The energy storage device according to claim 1, It is characterized in that The energy storage device also includes: A connecting piece (6) is used for fixedly connecting the inverter to the battery box, and the battery boxes to each other; and / or, connecting fasteners (7) for fixedly connecting the inverter to the battery box, the battery boxes to the battery boxes, and the battery module (2) to the external structure; and / or, expansion bolts (8) for passing through the connecting fasteners (7) to securely connect the energy storage device to the external structure; And / or, a connecting piece (9) for fixedly connecting the battery box and the base.

8. The energy storage device according to claim 1, It is characterized in that The energy storage device also includes: A communication line (19) is used for transmitting signals between the inverter and the battery box, and between the battery boxes; And / or, a GPRS module (21) for performing GPRS remote control and signal transmission on the energy storage device.

9. The energy storage device according to claim 1, It is characterized in that The energy storage device further comprises: a base (3), wherein the base (3) is located below the battery module (2) and is used to isolate the battery module (2) from the ground.

10. The energy storage device according to claim 9, It is characterized in that The energy storage device further comprises: a positioning concave-convex package (20) used for positioning and matching between the inverter and the battery box, between the battery boxes, and between the battery box and the base (3).

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