Mobile energy storage container

Abstract

The utility model discloses a movable energy storage container. The mobile energy storage container comprises a container body, and a DCDC converter, a PCS inverter, a DC combiner box, heat dissipation equipment and a battery cluster which are positioned in the container body, so that the integration level of the mobile energy storage container can be improved, the mobile energy storage container is convenient to transport and use, and space and time cost are saved. The battery cluster is connected with the direct-current combiner box through the DCDC converter, the DCDC converter can adjust the voltage of a battery pack in the battery cluster so that the battery cluster can be charged and discharged according to rated current, the direct-current combiner box is connected to the direct-current side of the PCS inverter, the alternating-current side of the PCS inverter is connected to the alternating-current combiner box, and the heat dissipation equipment is used for cooling the battery cluster. According to the mobile energy storage container, each battery cluster can be charged and discharged according to rated current under the adjusting action of the DCDC converter, so that non-uniform current among the battery clusters is prevented, high utilization rate and available capacity of the battery clusters are ensured, and the use safety and reliability of the mobile energy storage container are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of mobile energy storage and power supply technology, and in particular relates to a mobile energy storage container. Background Technology

[0002] Currently, energy storage technology has shown remarkable performance in areas such as smoothing renewable energy output, peak shaving and frequency regulation, and valley filling. Therefore, the development of energy storage technology has significant practical implications. When traditional DC-side battery containers for energy storage are moved to a different location for continued use, the cables between the battery container and the external PCS equipment need to be removed. This process may pose safety hazards, and it is time-consuming, cumbersome, and has poor integration performance.

[0003] Based on this, in the prior art, Chinese invention patent application number CN201911413314.3 provides an energy storage container system and an energy storage power station, which integrates the energy storage battery compartment, PCS inverter, combiner cabinet and thermal management unit in the same container, thereby saving space and time costs, facilitating transportation, relocation and use, and achieving a high degree of integration. However, in the above container system, the battery clusters in the energy storage battery compartment are all connected in parallel to the AC bus through the PCS unit, which forces the voltage of each battery cluster to be equalized. Due to the different internal resistance of the battery packs in each cluster, it will lead to uneven current in each battery cluster, resulting in low battery utilization and a gradual reduction in usable capacity.

[0004] Based on the above, there is an urgent need for a mobile energy storage container to solve the technical problems existing in the current technology. Utility Model Content

[0005] The purpose of this utility model is to provide a mobile energy storage container that, while meeting the requirements of high integration, thus facilitating transportation and use, and saving space and time costs, ensures that each battery cluster has a high utilization rate, maintains sufficient available capacity, and improves the safety and reliability of use.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A mobile energy storage container includes: a container body, and integrated within the container body a DC-DC converter, a PCS inverter, a DC combiner box, a heat dissipation device, and multiple battery clusters. The battery clusters are connected to the DC combiner box via the DC-DC converter. The DC-DC converter is used to regulate the voltage of the battery packs within the battery clusters so that the battery clusters can be charged and discharged according to the rated current. The DC combiner box is connected to the DC side of the PCS inverter, and the AC side of the PCS inverter is connected to the AC combiner box. The heat dissipation device is used to cool the battery clusters.

[0008] Optionally, the AC combiner box is disposed inside the box body.

[0009] Optionally, the enclosure includes an integrated cabinet, which has a first mounting cavity and a second mounting cavity. One of the first mounting cavity and the second mounting cavity is used to house the DC combiner box, and the other of the first mounting cavity and the second mounting cavity is used to house the AC combiner box.

[0010] Optionally, the enclosure also integrates fire-fighting equipment, including fire-fighting devices, smoke sensors, temperature sensors, and alarms, with the smoke sensors and temperature sensors both connected to the alarms.

[0011] Optionally, the fire-fighting device includes a water fire-fighting device and / or a gas fire-fighting device.

[0012] Optionally, a mounting frame is provided inside the enclosure, and the fire-fighting equipment is fixed on the mounting frame.

[0013] Optionally, a communication cabinet is also fixed at the bottom of the enclosure, the communication cabinet including an external incoming line switch, a heat dissipation equipment switch, an access control switch, and a data acquisition unit.

[0014] Optionally, the DC-DC converter includes two sets of input-output interfaces, each set of input-output interfaces being connected to one of the battery clusters.

[0015] Optionally, the heat dissipation equipment may be a liquid cooling unit and / or an air conditioning unit.

[0016] Optionally, it also includes a battery rack fixed inside the housing, the battery rack being fixed to the bottom of the housing, the battery rack being arranged one-to-one with the battery cluster, and the battery rack having a receiving compartment that is arranged one-to-one with the battery pack.

[0017] The beneficial effects of this invention are as follows: By integrating the DC-DC converter, PCS inverter, DC combiner box, heat dissipation equipment, and multiple battery clusters into the container, the integration level of the mobile energy storage container can be effectively improved, facilitating transportation and use, saving space, and avoiding the need to disconnect the connection between the PCS inverter and the battery clusters during movement, thus saving the time cost of disassembly. Furthermore, since the battery clusters are connected to the DC combiner box after passing through the DC-DC converter, each battery cluster can be charged and discharged according to its rated current under the voltage regulation of the battery pack by the DC-DC converter. This prevents uneven current distribution between battery clusters, ensuring that each battery cluster has a high utilization rate and usable capacity, greatly improving the safety and reliability of the mobile energy storage container. Attached Figure Description

[0018] Figure 1This is a front view of the internal structure of the mobile energy storage container provided in Embodiment 1 of this utility model;

[0019] Figure 2 This is a rear view of the internal structure of the mobile energy storage container provided in Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram showing the connection of some structures in the mobile energy storage container provided by this utility model.

[0021] Figure 4 This is a front view of the internal structure of the mobile energy storage container provided in Embodiment 2 of this utility model;

[0022] Figure 5 This is a left-side view of the internal structure of the mobile energy storage container provided in Embodiment 2 of this utility model;

[0023] Figure 6 This is a right-side view of the internal structure of the mobile energy storage container provided in Embodiment 2 of this utility model.

[0024] In the picture:

[0025] 1. Enclosure; 2. DC-DC converter; 3. PCS inverter; 4. DC combiner box; 5. Heat dissipation equipment; 6. Battery cluster; 61. Battery pack; 62. High voltage box; 7. AC combiner box; 8. Battery rack; 9. Fire protection equipment; 10. Mounting rack; 11. Communication cabinet; 12. Integrated cabinet. Detailed Implementation

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The technical solution provided by this utility model will be described below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] This embodiment provides a mobile energy storage container, such as Figures 1 to 3 As shown, it includes a housing 1, a DC-DC converter 2, a PCS inverter 3, a DC combiner box 4, a heat dissipation device 5, and multiple battery clusters 6 stacked in a preset manner. The battery packs 61 in the battery clusters 6 are connected to the DC-DC converter 2 via a high-voltage box 62, and then connected to the DC bus in the DC combiner box 4 via the DC-DC converter 2. The output of the DC combiner box 4 is connected to the DC side of the PCS inverter 3, and the AC side of the PCS inverter 3 is connected to the AC combiner box 7. The heat dissipation device 5 cools the battery clusters 6, maintaining them within their normal operating temperature range. Furthermore, it should be noted that in this embodiment, the DC-DC converter 2, PCS inverter 3, DC combiner box 4, heat dissipation device 5, and battery clusters 6 are all fixedly installed inside the housing 1. This effectively improves the integration of the mobile energy storage container, eliminating the need to disconnect the connection between the PCS inverter 3 and the battery clusters 6 when moving the housing 1, thus facilitating transportation and use, and saving space and time costs.

[0032] Furthermore, in this embodiment, by connecting the DC-DC converter 2 located inside the housing 1 between the battery cluster 6 and the DC combiner box 4, the DC-DC converter 2 plays the role of adjusting the voltage of the battery pack 61 in the battery cluster 6, so that each battery cluster 6 can be charged and discharged according to the rated current. This avoids the hidden danger of uneven current between battery clusters 6 caused by directly connecting the battery cluster 6 to the DC combiner box 4 in the prior art, thereby ensuring that each battery cluster 6 has a high utilization rate and available capacity, which greatly improves the safety and reliability of the mobile energy storage container.

[0033] Specifically, refer to Figure 3As shown, the aforementioned DC-DC converter 2 includes two sets of input-output interfaces, each set of which is connected to a battery cluster 6 in a one-to-one correspondence. This allows two battery clusters 6 to be connected to the DC combiner box 4 through one DC-DC converter 2, thereby effectively reducing the number of DC-DC converters 2 required, saving on the cost of using the DC-DC converters 2, and reducing the space occupied by the DC-DC converters 2 within the housing 1. Preferably, in this embodiment, the housing 1 is provided with three DC-DC converters 2 stacked vertically. The DC-DC converters 2 can be intelligent battery cluster controllers of models such as LUNA2000-2.0MWH-2H0 and LUNA2000-2.0MWH-2H1, which are available on the market, and six battery clusters 6 arranged in two rows and three columns.

[0034] Preferably, in this embodiment, the DC combiner box 4 is connected to the AC combiner box 7 through five parallel PCS inverters 3. The purpose of setting multiple PCS inverters 3 is to improve the working reliability of the mobile energy storage container. When one PCS inverter 3 fails, the other four PCS inverters 3 can still continue to work to ensure the continuous operation and power supply safety of the mobile energy storage container.

[0035] Specifically, in this embodiment, the heat dissipation device 5 includes three air conditioning units, each corresponding to two battery clusters 6. Thus, the high heat dissipation performance of the heat dissipation device 5 can be achieved through three air conditioning units. These air conditioning units are readily available on the market, and their operating principles and methods are existing technologies, which will not be elaborated upon here. It is understood that this invention does not limit the number of air conditioning units provided, as long as the required heat dissipation efficiency for the heat dissipation device 5 under actual operating conditions is met.

[0036] Specifically, in this embodiment, the mobile energy storage container further includes six battery racks 8, which are fixedly installed at the bottom of the container body 1. These six battery racks 8 are used to securely install six battery clusters 6 within the container body 1, thereby ensuring the installation stability of the battery clusters 6. Preferably, each battery cluster 6 includes nineteen battery packs 61 arranged vertically; correspondingly, multiple steel plates are spaced vertically within each battery rack 8 to divide each rack 8 into nineteen compartments for accommodating the battery packs 61. It is understood that, to improve the reliability of the battery racks 8, they can be made of alloy steel or other metal materials, manufactured through casting, welding, or other methods, to significantly improve their resistance to deformation and their supporting strength.

[0037] Specifically, in this embodiment, the mobile energy storage container also includes a fire-fighting device 9 installed inside the container body 1. The fire-fighting device 9 can assist the heat dissipation device 5 in maintaining the temperature inside the container body 1 within a suitable range, ensuring the safe and reliable use of the mobile energy storage container. More specifically, the fire-fighting device 9 includes a fire-fighting device, a smoke sensor, a temperature sensor, and an alarm, with both the smoke sensor and the temperature sensor connected to the alarm. For example, in use, when the smoke sensor detects that the smoke concentration inside the container body 1 reaches a set smoke concentration threshold, or when the temperature sensor detects that the temperature inside the container body 1 reaches a set temperature threshold, it will immediately send an alarm signal to the alarm. Upon receiving the signal, the alarm will immediately emit an audible signal, enabling personnel to immediately use the fire-fighting device to eliminate the smoke inside the container body 1 or reduce the temperature inside the container body 1.

[0038] Preferably, the fire-fighting device can be a water-based fire-fighting device such as a wet sprinkler system, or a gas-based fire-fighting device such as a carbon dioxide fire extinguisher, an inert gas fire extinguisher, or a chemical cleaning agent fire extinguisher. Those skilled in the art can select the appropriate fire-fighting device according to actual needs, and this invention is not limited in this regard. Of course, in other embodiments, both water-based and gas-based fire-fighting devices can be installed simultaneously within the housing 1, allowing for flexible selection of the type of fire-fighting device based on factors such as risk level and fire stage, thereby improving fire-fighting efficiency and safety.

[0039] Furthermore, in this embodiment, an installation frame 10 is installed inside the container 1, and the aforementioned fire-fighting equipment 9 is fixedly installed on the installation frame 10. By placing the fire-fighting equipment 9 above the container 1, it is helpful to arrange the wiring of the fire-fighting pipe in the fire-fighting equipment 9, avoid the fire-fighting pipe from getting tangled with other cables, enhance the neatness of the wiring inside the mobile energy storage container, and facilitate the subsequent inspection, maintenance and replacement of the fire-fighting pipe and cables.

[0040] Specifically, the mobile energy storage container provided in this embodiment also includes a communication cabinet 11. The communication cabinet 11 integrates an external incoming line switch (preferably a 380V customer incoming line switch), a heat dissipation device switch, an access control switch, and a data acquisition unit. The external incoming line switch controls the connection between the external device and the battery clusters 6 inside the container 1; the heat dissipation device 5 switch controls the opening and closing of the heat dissipation device 5; the access control switch controls the opening and closing of the double doors of the container 1 and can communicate with the mobile control device to allow staff to control the double doors; the data acquisition unit collects various signals such as temperature, current, and voltage of the battery clusters 6 to allow staff to monitor the working status of the battery clusters 6. Furthermore, the communication cabinet 11 is fixedly installed at the bottom of the container 1 to facilitate wiring with external devices.

[0041] Specifically, in this embodiment, the AC combiner box 7 is also installed inside the container 1, thereby further improving the integration level of the mobile energy storage container.

[0042] Example 2

[0043] This embodiment provides a mobile energy storage container, combined with Figures 4 to 6 As shown, the mobile energy storage container provided in this embodiment has a structure that is largely the same as that provided in Embodiment 1. The difference lies in that, in this embodiment, the mobile energy storage container further includes an integrated cabinet 12 fixed within the container body 1. The integrated cabinet 12 has a first mounting cavity and a second mounting cavity. The first mounting cavity is used to accommodate the DC combiner box 4, and the second mounting cavity is used to accommodate the AC combiner box 7. This allows both the DC combiner box 4 and the AC combiner box 7 to be integrated into one integrated cabinet 12, improving the convenience of installing the DC combiner box 4 and the AC combiner box 7 within the container body 1. Of course, in other parallel embodiments, the first mounting cavity can also be used to install the AC combiner box 7, and the second mounting cavity can be used to install the DC combiner box 4; this utility model is not limited in this respect.

[0044] Specifically, in this embodiment, the heat dissipation device 5 employs three sets of liquid cooling units, each set used to cool two battery clusters 6. Thus, the purpose of cooling six battery clusters 6 to a suitable temperature range can be achieved using only three liquid cooling units. Of course, in other parallel embodiments, the heat dissipation device 5 can also employ both liquid cooling units and air conditioning units to improve the flexibility of its selection. The number of liquid cooling units and air conditioning units used is not limited, as long as it ensures that the battery clusters 6 are maintained within a suitable operating temperature range.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Mobile energy storage container, characterized in that include: The enclosure (1) includes a DC-DC converter (2), a PCS inverter (3), a DC combiner box (4), a heat dissipation device (5), and multiple battery clusters (6) integrated within the enclosure (1). The battery clusters (6) are connected to the DC combiner box (4) via the DC-DC converter (2). The DC-DC converter (2) is used to regulate the voltage of the battery pack (61) within the battery clusters (6) so that the battery clusters (6) can charge and discharge according to the rated current. The DC combiner box (4) is connected to the DC side of the PCS inverter (3), and the AC side of the PCS inverter (3) is connected to the AC combiner box (7). The heat dissipation device (5) is used to cool the battery clusters (6).

2. The mobile energy storage container of claim 1, wherein, The AC combiner box (7) is located inside the box body (1).

3. The mobile energy storage container of claim 2, wherein, The enclosure (1) includes an integrated cabinet (12), which has a first mounting cavity and a second mounting cavity. One of the first mounting cavity and the second mounting cavity is used to house the DC combiner box (4), and the other of the first mounting cavity and the second mounting cavity is used to house the AC combiner box (7).

4. The mobile energy storage container of claim 1, wherein, The enclosure (1) is also equipped with fire-fighting equipment (9), which includes fire-fighting devices, smoke sensors, temperature sensors and alarms. The smoke sensors and temperature sensors are both connected to the alarms.

5. The mobile energy storage container of claim 4, wherein, The fire-fighting equipment includes water fire-fighting equipment and / or gas fire-fighting equipment.

6. The mobile energy storage container of claim 4, wherein, The housing (1) is equipped with a mounting frame (10), and the fire-fighting equipment (9) is fixed on the mounting frame (10).

7. The mobile energy storage container of claim 1, wherein, The bottom of the enclosure (1) is also fixed with a communication cabinet (11), which includes an external incoming line switch, a heat dissipation equipment switch, an access control switch and a data acquisition device.

8. The mobile energy storage container of claim 1, wherein, The DC-DC converter (2) includes two sets of input-output interfaces, each set of input-output interfaces being connected to one of the battery clusters (6).

9. The mobile energy storage container of claim 1, wherein, The heat dissipation equipment (5) adopts a liquid cooling unit and / or an air conditioning unit.

10. The mobile energy storage container of claim 1, wherein, It also includes a battery rack (8) fixed inside the housing (1), the battery rack (8) being fixed to the bottom of the housing (1), the battery rack (8) being arranged one-to-one with the battery cluster (6), and the battery rack (8) having a receiving compartment that is arranged one-to-one with the battery pack (61).

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