External energy storage system

Abstract

The utility model discloses an external energy storage system which comprises a battery swap station and an energy storage system, the battery swap station is electrically connected to a power grid, a plurality of battery boxes and the energy storage system are arranged in the battery swap station, the energy storage system is arranged outside the battery swap station, and the energy storage system is electrically connected to the power grid and the battery swap station. The energy storage system can output electric energy to the battery swap station, the energy storage system is provided with a plurality of battery boxes, and the number of the battery boxes of the energy storage system is smaller than that of the battery boxes of the battery swap station. The battery box of the energy storage system can select idle batteries in stock, the energy storage system can be used for supplying power to the battery swap station to achieve virtual capacity increasing, and the problem that the power capacity of the battery swap station is insufficient can be solved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an external energy storage system. Background Art

[0002] Existing battery swapping stations mainly provide a large number of battery boxes to support vehicles to replace the battery boxes to achieve the function of rapid energy replenishment. The battery swapping station is usually connected to a transformer on the power grid to charge the internal battery boxes. The total charging power of the battery swapping station is affected by the power capacity of the transformer. If multiple batteries are charged simultaneously, the excessive total charging power may cause the transformer load capacity to be exceeded. There is a problem of insufficient power capacity in the battery swapping station. In the prior art, the energy storage system cannot or does not effectively utilize the idle batteries in stock. Summary of the Utility Model

[0003] To solve one of the above technical problems, the utility model provides an external energy storage system.

[0004] The utility model adopts the following technical solutions:

[0005] An external energy storage system, comprising:

[0006] A battery swapping station, the battery swapping station is electrically connected to the power grid, and a plurality of battery boxes are arranged in the battery swapping station;

[0007] An energy storage system, the energy storage system is arranged outside the battery swapping station, the energy storage system is electrically connected to the power grid and the battery swapping station respectively, the energy storage system can output electric energy to the battery swapping station, the energy storage system has a plurality of battery boxes, and the number of battery boxes of the energy storage system is less than the number of battery boxes of the battery swapping station.

[0008] Optionally, the external energy storage system includes a grid connection cabinet, the grid connection cabinet has a PCS module, and the grid connection cabinet is connected to the power grid;

[0009] The energy storage system is electrically connected to the grid connection cabinet;

[0010] The battery swapping station has a charger, the charger is electrically connected to the battery boxes in the battery swapping station, and the charger is electrically connected to the grid connection cabinet and the power grid.

[0011] Optionally, the energy storage system includes a battery base, and the battery boxes of the energy storage system are detachably connected to the battery base.

[0012] Optionally, the battery base has a first connector, the first connector is electrically connected to the grid connection cabinet, and the battery box has a second connector;

[0013] In the state where the battery box is installed on the battery base, the first connector and the second connector are electrically connected.

[0014] Optionally, the battery boxes of the energy storage system and the battery boxes of the battery swapping station have the same structure and shape.

[0015] Optionally, the battery box of the energy storage system has a hoisting fitting part.

[0016] Optionally, a plurality of guiding bodies are arranged on the battery base, and the guiding bodies have guiding inclined surfaces;

[0017] During the process of the battery box falling vertically, it can move along the guiding body to a set position on the battery base;

[0018] When the battery box is supported on the battery base, the guiding body and the battery box are in limit cooperation.

[0019] Optionally, the battery base has a locking mechanism, and when the battery box is installed on the battery base, the locking mechanism can lock the battery box.

[0020] Optionally, a through telescopic groove is arranged on the guiding body;

[0021] The locking mechanism includes a plurality of telescopic components, each of the telescopic components is respectively connected to a corresponding guiding body, and the telescopic component can perform telescopic movement along the telescopic groove;

[0022] The locking mechanism has a locked state and a released state. In the locked state, the telescopic component extends out of the telescopic groove to be limited to the battery box, and in the released state, the telescopic component disengages from the battery box and retracts into the telescopic groove.

[0023] Optionally, a UPS module is arranged in the battery swapping station, and the UPS module is electrically connected to the grid connection cabinet.

[0024] By adopting the above technical solutions, the present application has the following beneficial effects:

[0025] In the present application, the battery boxes of the energy storage system can select idle batteries in stock. By using the energy storage system, the battery swapping station can be powered to achieve virtual capacity increase, which can solve the problem of insufficient power capacity of the battery swapping station to a certain extent.

[0026] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0027] The accompanying drawings, as part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0028] Figure 1 shows a schematic structural diagram of an external energy storage system provided by an embodiment of this application;

[0029] Figure 2 shows a schematic structural diagram of a battery base of an external energy storage system provided by an embodiment of this application.

[0030] In the figure: 1, battery swapping station; 2, energy storage system; 21, battery base; 211, guiding body; 212, telescopic component; 213, first connector; 22, battery box; 3, grid connection cabinet.

[0031] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] See Figure 1 and Figure 2As shown in the figure, an embodiment of the present application provides an external energy storage system, including: a battery swapping station 1 and an energy storage system 2. The battery swapping station 1 is electrically connected to the power grid. A plurality of battery boxes 22 are provided in the battery swapping station 1. The energy storage system 2 is arranged outside the battery swapping station 1. The energy storage system 2 is electrically connected to the power grid and the battery swapping station 1 respectively. The energy storage system 2 can output electric energy to the battery swapping station 1. The energy storage system 2 has a plurality of battery boxes 22, and the number of battery boxes 22 of the energy storage system 2 is less than the number of battery boxes 22 of the battery swapping station 1. In the present application, the battery boxes 22 of the energy storage system 2 can use idle batteries in stock. The energy storage system 2 can supply power to the battery swapping station 1, such as charging the battery boxes 22 of the battery swapping station 1, to achieve virtual capacity increase, and can solve the problem of insufficient power capacity of the battery swapping station 1 to a certain extent.

[0036] In some possible implementation solutions, the external energy storage system includes a grid connection cabinet 3. The grid connection cabinet 3 has a PCS module. The grid connection cabinet 3 is connected to the power grid. The energy storage system 2 is electrically connected to the grid connection cabinet 3. The battery swapping station 1 has a charger. The charger is electrically connected to the battery boxes 22 in the battery swapping station 1. The charger is electrically connected to the grid connection cabinet 3 and the power grid. The energy storage system 2 can convert energy by means of the PCS module, output electric energy to the power grid or the battery swapping station 1 through the PCS module, and can also be charged through the power grid.

[0037] In some possible implementation solutions, the energy storage system 2 includes a battery base 21. The battery boxes 22 of the energy storage system 2 are detachably connected to the battery base 21. The energy storage system 2 of the present application adopts a mode of replaceable batteries, which is beneficial to using idle batteries, reduces costs, and effectively solves the problem of insufficient power capacity of the battery swapping station 1.

[0038] The energy storage system 2 can be charged from the power grid through the PCS module, or the rapid charging demand of the energy storage charging pile can be met by replacing the battery box 22. When there is power in the power grid, during the low electricity consumption period, the battery box 22 is charged through the PCS module. During the high electricity consumption period, the battery phase of the energy storage system 2 can discharge to the power grid through the PCS module to achieve the function of peak shaving and valley filling, and save electricity costs.

[0039] In some possible implementation solutions, the battery base 21 has a first connector 213. The first connector 213 is electrically connected to the grid connection cabinet 3. The battery box 22 has a second connector. In the state where the battery box 22 is installed on the battery base 21, the first connector 213 and the second connector are electrically connected. Thus, the battery box 22 and the grid connection cabinet 3 are connected.

[0040] In some possible embodiments, the battery boxes 22 of the energy storage system 2 and the battery boxes 22 of the battery swapping station 1 have the same structure and shape. The battery boxes 22 of the external energy storage system are universal, and the battery boxes 22 in the battery swapping station 1 can be directly installed on the energy storage system 2. Some old battery boxes 22 can be reused for the energy storage system 2.

[0041] In some possible embodiments, the battery box 22 of the energy storage system 2 has a hoisting fitting part, and the hoisting fitting part can be a lifting lug or a hoisting fitting frame provided on the battery box 22, which is convenient for hoisting with a hoisting tool for assembly or disassembly.

[0042] In some possible embodiments, a plurality of guiding bodies 211 are provided on the battery base 21. The guiding bodies 211 have guiding inclined surfaces. During the process of the battery box 22 falling vertically, it can move along the guiding bodies 211 to a set position on the battery base 21. In the state where the battery box 22 is supported on the battery base 21, the guiding bodies 211 and the battery box 22 are in limit fit. A fitting frame is provided at the bottom of the battery box 22, which can cooperate with the guiding bodies 211 to achieve guiding and positioning fit. It should be noted that the cooperation structure between the battery box base and the fitting frame of the battery box is disclosed in many prior arts, and the structure of the fitting frame of the battery box will not be elaborated in this application.

[0043] In some possible embodiments, the battery base 21 has a locking mechanism. In the state where the battery box 22 is installed on the battery base 21, the locking mechanism can lock the battery box 22, so that the battery box 22 is stably assembled on the battery base 21.

[0044] A through telescopic groove is provided on the guiding body 211. The locking mechanism includes a plurality of telescopic components 212. Each telescopic component 212 is respectively connected to the corresponding guiding body 211. The telescopic component 212 can perform telescopic movement along the telescopic groove, and the telescopic direction of the telescopic component 212 can be perpendicular to the guiding body 211. The locking mechanism has a locking state and a release state. In the locking state, the telescopic component 212 extends out of the telescopic groove to be limited to the battery box 22. In the release state, the telescopic component 212 disengages from the battery box 22 and retracts into the telescopic groove. The telescopic component 212 can adopt an electric push rod or other structures.

[0045] A UPS module can be provided in the battery swapping station 1, and the UPS module is electrically connected to the grid connection cabinet 3. When the power grid loses power, the UPS module in the battery swapping station 1 can provide a 220V power supply to the grid connection cabinet 3 of the energy storage system 2, so that the energy storage system 2 can operate normally and continue to supply power to important loads to avoid losses caused by power outages.

[0046] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some changes or modifications using the technical content prompted above to obtain equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An external energy storage system, characterized in that, Comprising: A battery swapping station, which is electrically connected to the power grid, and a plurality of battery boxes are arranged in the battery swapping station; An energy storage system, which is arranged outside the battery swapping station, is electrically connected to the power grid and the battery swapping station respectively, can output electric energy to the battery swapping station, has a plurality of battery boxes, and the number of battery boxes of the energy storage system is less than that of the battery boxes of the battery swapping station.

2. The external energy storage system according to claim 1, characterized in that, Comprising a grid connection cabinet, which has a PCS module and is connected to the power grid; The energy storage system is electrically connected to the grid connection cabinet; The battery swapping station has a charger, which is electrically connected to the battery boxes in the battery swapping station and is electrically connected to the grid connection cabinet and the power grid.

3. The external energy storage system according to claim 2, wherein The energy storage system includes a battery base, and the battery boxes of the energy storage system are detachably connected to the battery base.

4. The external energy storage system according to claim 3, characterized in that, The battery base has a first connector, and the first connector is electrically connected to the grid connection cabinet, and the battery box has a second connector; When the battery box is installed on the battery base, the first connector and the second connector are electrically connected.

5. The external energy storage system according to claim 4, wherein The battery boxes of the energy storage system and the battery boxes of the battery swapping station have the same structure and shape.

6. The external energy storage system according to claim 4, wherein The battery boxes of the energy storage system have hoisting mating parts.

7. The external energy storage system according to claim 4, wherein A plurality of guiding bodies are arranged on the battery base, and the guiding bodies have guiding inclined surfaces; During the process of the battery box falling vertically, it can move along the guiding body to a set position of the battery base; When the battery box is supported on the battery base, the guiding body and the battery box are in limit cooperation.

8. The external energy storage system according to claim 7, wherein, The battery base has a locking mechanism, and when the battery box is installed on the battery base, the locking mechanism can lock the battery box.

9. The external energy storage system according to claim 8, characterized in that, A through telescopic groove is arranged on the guiding body; The locking mechanism includes a plurality of telescopic components, each of the telescopic components is respectively connected to the corresponding guiding body, and the telescopic component can perform telescopic movement along the telescopic groove; The locking mechanism has a locking state and a release state. In the locking state, the telescopic component extends out of the telescopic groove to be limited to the battery box. In the release state, the telescopic component disengages from the battery box and retracts into the telescopic groove.

10. The external energy storage system according to any one of claims 2-9, characterized in that, A UPS module is arranged in the battery swapping station, and the UPS module is electrically connected to the grid connection cabinet.

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