Mobile energy storage device

Abstract

The utility model provides a mobile energy storage device. The mobile energy storage device comprises a frame, a battery cabin and an energy storage system cabin, wherein the battery cabin comprises a first box body and a first battery unit; and the energy storage system cabin and the battery cabin are arranged in parallel. The energy storage system cabin comprises a second box body, a second battery unit and a converter unit. And the first box body and the second box body are detachably arranged on the frame, so that the assembly is convenient, and a place needing electricity can be quickly reached. Through the arrangement of the battery cabin and the energy storage system cabin, the mobile energy storage device can effectively meet the requirements of different power consumption scenes and different power consumption facilities, and energy storage devices of various scales can be quickly formed according to actual requirements so as to provide power supply service to the outside. By arranging the solar cell panel, solar energy can be utilized to supplement electric energy for the cell cabin and the energy storage system cabin, and energy conservation and environmental protection are achieved. And the battery cabin and the energy storage system cabin are provided with side doors, so that installation and maintenance of equipment in the battery cabin and the energy storage system cabin are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a mobile energy storage device. Background Art

[0002] With the rapid development of society, there are more and more power-consuming facilities, and the reliability requirements of power consumption are getting higher and higher. Due to various reasons, many areas and scenarios cannot fully meet the power demand of power-consuming facilities (such as electric vehicles); once the power supply of some facilities (such as hospitals and base stations) fails, it will cause great losses. Therefore, how to ensure the power supply under special circumstances is particularly important.

[0003] The existing emergency power supply systems for important facilities are mainly fixed diesel generator sets. Fixed diesel generator sets have great limitations, may be idle all the time, and consume diesel when running, which will cause great air pollution. They are poor in flexibility, economy and environmental protection. Utility Model Content

[0004] One purpose of the utility model is to solve the deficiencies in the prior art and to provide a mobile energy storage device that is environmentally friendly, flexible, safe, and can meet the power needs of different power usage scenarios and different power facilities.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A mobile energy storage device, comprising:

[0007] Frame;

[0008] A battery compartment, comprising a first box body and a first battery unit, wherein the first battery unit is disposed in the first box body, and the first box body is detachably disposed on the vehicle frame;

[0009] an energy storage system compartment, arranged in parallel with the battery compartment, the energy storage system compartment comprising a second box, a second battery unit and a converter unit, the second battery unit and the converter unit are arranged in the second box, and the second box is detachably arranged on the frame, and the converter unit is electrically connected to the second battery unit; and

[0010] A connecting assembly is detachably disposed between the battery compartment and the energy storage system compartment, and electrically connects the battery compartment and the energy storage system compartment.

[0011] In an exemplary embodiment, the first box and the second box are standard-sized shipping containers.

[0012] In an exemplary embodiment, the battery compartment includes a first liquid-cooling heat dissipation unit, the first box body includes a first storage compartment and a second storage compartment separated from each other, the first battery unit is disposed in the first storage compartment, and the first liquid-cooling heat dissipation unit is disposed in the second storage compartment.

[0013] In an exemplary embodiment, the battery compartment further includes a first fire fighting unit and a first dehumidifier air conditioner, the fire fighting unit is disposed in the second storage compartment, and the first dehumidifier air conditioner is disposed outside the second storage compartment.

[0014] In an exemplary embodiment, the second box body includes a third storage compartment, a fourth storage compartment and a fifth storage compartment separated in sequence, the converter unit is arranged in the third storage compartment, the second battery unit is arranged in the fourth storage compartment, and a second liquid-cooling heat dissipation unit is arranged in the fifth storage compartment.

[0015] In an exemplary embodiment, the energy storage system compartment includes a control unit, a charging unit and a transformer unit, wherein the control unit is electrically connected to the charging unit, the transformer unit and the current conversion unit, the transformer unit is electrically connected to the second battery unit, the charging unit and the transformer unit are arranged in the third storage compartment, and the control unit is arranged in the fourth storage compartment or the third storage compartment.

[0016] In an exemplary embodiment, the energy storage system compartment further includes a second dehumidifier air conditioner, which is disposed outside the fifth storage compartment.

[0017] In an exemplary embodiment, the mobile energy storage device includes a solar panel for converting solar energy into electrical energy. The solar panel can be folded and arranged on the top of the frame. The solar panel is electrically connected to the converter unit.

[0018] In an exemplary embodiment, the deployment area of ​​the solar panel is larger than the area of ​​the vehicle frame.

[0019] In an exemplary embodiment, detachable or retractable support rods are arranged at intervals on the periphery of the solar panel, and the support rods are connected to the solar panel, and the support rods are used to support the solar panel.

[0020] In an exemplary embodiment, a plurality of telescopic rods are arranged in parallel on the top of the frame 1, one end of each telescopic rod is arranged on one side of the frame, and the other end of each telescopic rod is telescopic along the width direction of the frame. The solar panel is fixed on the telescopic rod, and the telescopic rod is extended and retracted to drive the solar panel to be folded.

[0021] In an exemplary embodiment, the first battery cell has a greater capacity than the second battery cell.

[0022] In an exemplary embodiment, the capacity of the first battery unit is 2200-2600 KWh, and the capacity of the second battery unit is 1000-1400 KWh.

[0023] In an exemplary embodiment, the first box and the second box are provided with a plurality of side doors along the length direction of the frame.

[0024] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0025] The mobile energy storage device in the utility model includes a frame, a battery compartment, an energy storage system compartment and a connecting assembly. The battery compartment includes a first box and a first battery unit. The energy storage system compartment is arranged in parallel with the battery compartment. The energy storage system compartment includes a second box, a second battery unit and a converter unit. The first box and the second box are detachably arranged on the frame. The battery unit replaces the traditional diesel power supply, which effectively reduces the generation of air pollution and has good environmental protection. In addition, the arrangement of the box and the arrangement of arranging the box on the frame make the utility model modular and portable. When construction sites, hospitals, etc. need electricity, they can quickly arrive and provide electricity. The detachable arrangement of the first box, the second box and the frame makes the utility model easy to load and unload, and can be replaced at any time to meet the electricity needs of different electricity scenarios and different electricity facilities, and can quickly form mobile energy storage devices of various sizes according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a mobile energy storage device according to one embodiment of the utility model.

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of the battery compartment in the mobile energy storage device shown.

[0028] Figure 3 yes Figure 1 The schematic diagram of the structure of the energy storage system cabin in the mobile energy storage device shown.

[0029] Figure 4 yes Figure 1 The structure diagram of the mobile energy storage device shown is a schematic diagram after removing the battery compartment and the energy storage system compartment.

[0030] The reference numerals are as follows: 1, frame; 11, load-bearing beam;

[0031] 2. Battery compartment; 21. First box; 211. First storage compartment; 212. Second storage compartment; 22. First battery unit; 221. First battery cluster; 23. First liquid cooling unit; 24. First fire protection unit; 25. First dehumidifier air conditioner;

[0032] 3. Energy storage system compartment; 31. Second box; 311. Third storage compartment; 312. Fourth storage compartment; 313. Fifth storage compartment; 32. Second battery unit; 321. Second battery cluster; 33. Converter unit; 34. Control unit; 35. Charging unit; 36. Transformer unit; 37. Second liquid cooling unit; 38. Dehumidifier air conditioner; 39. Second fire fighting unit; 310. Cable reel;

[0033] 4. Corner fittings;

[0034] 5. Solar panels;

[0035] 6. Support rod;

[0036] 7. Telescopic rod;

[0037] 8. Side door. DETAILED DESCRIPTION

[0038] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0039] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] This embodiment provides a new mobile energy storage device, which is environmentally friendly, flexible, and safe, and can meet the electricity needs of different electricity usage scenarios and different electricity facilities. The specific scheme is explained through the following embodiments.

[0042] See also Figure 1 As shown, the mobile energy storage device includes a frame 1, a battery compartment 2, an energy storage system compartment 3 and a connection assembly (not marked in the figure).

[0043] Preferably, the frame 1 is a standard 40-foot trailer. The trailer is a mature and versatile vehicle with a low cost, which can greatly reduce the cost of the mobile energy storage power station. In addition, the setting of the trailer facilitates the flexible power supply and charging of the mobile energy storage device. That is, the battery compartment 2 and the energy storage system compartment 3 used for external power supply can be transported to the place where electricity is needed as needed to provide power supply services; it can also be flexibly and conveniently connected to the power grid or other energy systems to supplement the battery compartment 2 and the energy storage system compartment 3 with electricity.

[0044] The battery compartment 2 and the energy storage system compartment 3 are detachably mounted on the vehicle frame 1 to facilitate movement and quickly reach the electricity usage scene. Among them, the battery compartment 2 is used to store electrical energy. The energy storage system compartment 3 is arranged in parallel with the battery compartment 2 and is electrically connected to the battery compartment 2. The energy storage system compartment 3 is mainly used to transmit electrical energy to the outside. It can be understood that the electrical energy stored in the battery compartment 2 is transmitted to the energy storage system compartment 3, and the energy storage system compartment 3 transmits electrical energy to the outside.

[0045] Furthermore, the connection component is detachably arranged between the battery compartment 2 and the energy storage system compartment 3. The battery compartment 2 and the energy storage battery compartment 2 are electrically connected. That is, the battery compartment 2 is electrically connected to the energy storage battery compartment 2 through the connection component to transmit the electrical energy in the battery compartment 2 to the energy storage system compartment 3. The detachable setting of the connection component makes the mobile energy storage device in this embodiment more flexible, that is, the battery compartment 2 and the energy storage system compartment 3 can be connected or disconnected according to actual needs, so as to load, unload or replace the battery compartment 2 or the energy storage system compartment 3. Optionally, the connection component is a pluggable connector.

[0046] See also Figures 1 to 3 The battery compartment 2 includes a first box body 21. The energy storage system compartment 3 includes a second box body 31. It can be understood that the arrangement of the box body makes the mobile energy storage unit of the utility model have the characteristics of modularization, which is convenient for loading and unloading.

[0047] Preferably, the first box body 21 and the second box body 31 are containers of standard size to effectively save costs without the need for additional customized boxes.

[0048] See Figures 1 to 4, the first box body 21 and the second box body 31 are detachably arranged on the frame 1. In one embodiment, the first box body 21 and the second box body 31 include corner pieces 4 arranged at the corners of the boxes. A load-bearing beam 11 for bearing the corner piece 4 is provided on the frame 1. The corner piece 4 and the load-bearing beam 11 can be connected by a connecting piece, so that the battery compartment 2 and the energy storage system compartment 3 can be fixed on the frame 1, which is beneficial to ensure the stability of energy supply and the stability of the equipment in the compartment. If the battery compartment 2 or the energy storage system compartment 3 needs to be loaded, unloaded or replaced, it is only necessary to disconnect the connection between the corner piece 4 and the load-bearing beam 11.

[0049] See also Figure 2 As shown, the battery compartment 2 includes a first battery unit 22. The first battery unit 22 is disposed in the first box body 21. Specifically, the first box body 21 includes a first storage compartment 211 and a second storage compartment 212 that are separated. The first battery unit 22 is disposed in the first storage compartment 211.

[0050] Furthermore, the first battery unit 22 includes a plurality of first battery clusters 221. The battery cluster has the characteristics of environmental protection, high energy density, and high cycle life, and can be used as an energy storage unit. Each first battery cluster 221 includes a plurality of stacked energy storage battery packs. Preferably, the energy storage battery pack is a lithium iron phosphate battery pack.

[0051] Preferably, each first battery cluster 221 is equipped with a high-voltage control box to ensure reliable operation of the battery cluster.

[0052] The battery compartment 2 includes a first liquid cooling and heat dissipation unit 23. The first liquid cooling and heat dissipation unit 23 is arranged in the second storage compartment 212. The first liquid cooling and heat dissipation unit 23 is used to stably control the temperature of the energy storage battery pack in the battery compartment, so that the temperature difference between the cells of the energy storage battery pack is smaller, thereby better ensuring the safety of the first battery unit 22. Furthermore, a liquid cooling pipe or a liquid cooling plate connected to the first liquid cooling and heat dissipation unit 23 is arranged in the first storage compartment 211, so that the first liquid cooling and heat dissipation unit 23 has the function of cooling the first battery unit 22 to ensure the safety of the first battery unit 22.

[0053] Preferably, the battery compartment 2 further includes a first fire fighting unit 24 and a first dehumidifier air conditioner 25. In one embodiment, the first fire fighting unit 24 is disposed in the second storage compartment 212. The first dehumidifier air conditioner 25 is disposed outside the second storage compartment 212.

[0054] The first fire fighting unit 24 is used to further ensure the safety in the battery compartment 2. Preferably, the first fire fighting unit 24 is a three-level fire fighting system to effectively ensure the fire fighting safety in the compartment. Optionally, the first fire fighting unit 24 includes a fire fighting liquid using perfluorohexanone as a raw material.

[0055] The first dehumidifier air conditioner 25 is used to control the humidity in the battery compartment 2 to ensure a safe operating environment in the battery compartment 2. In addition, the first dehumidifier air conditioner 25 can also heat the compartment at low temperatures to ensure the smooth operation of the battery compartment 2.

[0056] See also Figure 3 As shown, the energy storage system compartment 3 includes a second battery unit 32 and a current conversion unit 33. The second battery unit 32 is electrically connected to the current conversion unit 33.

[0057] The second battery unit 32 and the converter unit 33 are arranged in the second box body 31. Specifically, the second box body 31 includes a third storage compartment 311, a fourth storage compartment 312, and a fifth storage compartment 313 that are separated in sequence. That is, the third storage compartment 311, the fourth storage compartment 312, and the fifth storage compartment 313 are arranged in sequence along the driving direction of the frame 1. The converter unit 33 is arranged in the third storage compartment 311, and the second battery unit 32 is arranged in the fourth storage compartment 312.

[0058] Furthermore, the second battery unit 32 includes a plurality of second battery clusters 321. The second battery clusters 321 are configured substantially the same as the first battery clusters 221 in the first battery unit 22, that is, each second battery cluster 321 includes a plurality of stacked energy storage battery packs. Preferably, each second battery cluster 321 is equipped with a high-voltage control box.

[0059] It can be understood that the arrangement of the second battery unit 32 in the energy storage system compartment 3 enables the energy storage system compartment 3 to also store electrical energy, which is beneficial to increasing the total energy of the energy storage device.

[0060] The total capacity of the energy storage device in the present application is relatively large, up to 4000KWh (kilowatt-hour). Specifically, the capacity of the first battery unit 22 in the battery compartment 2 is greater than the capacity of the second battery unit 32 in the energy storage system compartment 3. Since the battery compartment 2 is only provided with the first battery unit 22, the first liquid cooling unit 23, the first fire protection unit 24 and the first dehumidifier air conditioner 25, it can accommodate more battery clusters, so that the capacity of the battery compartment 2 is greater than the capacity of the energy storage system compartment 3.

[0061] Further, the capacity of the first battery unit 22 is 2200KWh to 2600KWh. The capacity of the second battery unit 32 is 1000KWh to 1400KWh. In this embodiment, the capacity of the first battery unit 22 is 2400KWh, and the capacity of the second battery unit 32 is 1200KWh.

[0062] The battery compartment 2 and the energy storage system compartment 3 can be matched according to the needs of the actual power consumption scene. For example, if the power consumption of the power consumption scene is less than 1200KWh, the energy storage system compartment 3 can be loaded on the frame 1 to meet the power supply needs of external facilities; or, if the power consumption of the power consumption scene or the power consumption equipment is large, the battery compartment 2 and the energy storage system compartment 3 are installed on the frame 1 at the same time, and the battery compartment 2 is electrically connected to the energy storage system compartment 3 through the connection component to form a larger charging station to provide sufficient power for the external power consumption equipment.

[0063] Preferably, the converter unit 33 is a bidirectional converter for energy storage. The converter unit 33 is used to realize the conversion of electric energy from AC to DC. For example, if charging an electric vehicle or other equipment, the external DC can be converted into AC.

[0064] The energy storage system compartment 3 further includes a control unit 34 , a charging unit 35 and a voltage transformation unit 36 ​​.

[0065] The control unit 34, the charging unit 35 and the transformer unit 36 ​​are all disposed in the second box 31. Specifically, the charging unit 35 and the transformer unit 36 ​​are disposed in the third storage compartment 311. The control unit 34 is disposed in the third storage compartment 311 or in the fourth storage compartment 312. In this embodiment, the control unit 34 is disposed in the fourth storage compartment 312 as an example.

[0066] The control unit 34 is electrically connected to the converter unit 33, the charging unit 35 and the transformer unit 36. The control unit 34 is used to control and manage other devices in the battery compartment 2 and the energy storage system compartment 3, including but not limited to the confluence and control of the first battery unit 22 and the second battery unit 32. Preferably, the control unit 34 is arranged at a corner of the fourth storage compartment 312 close to the third storage compartment 311, so as to facilitate the connection of the converter unit 33, the charging unit 35, the transformer unit 36, etc.

[0067] The charging unit 35 is used to charge external power facilities, such as electric vehicles, etc. Optionally, the charging unit 35 includes a charger and / or a charging gun used in conjunction with the charger.

[0068] The voltage transformation unit 36 ​​is electrically connected to the second battery unit 32. The voltage transformation unit 36 ​​is used to control the input and output voltages of the second battery unit 32 according to different application requirements.

[0069] Preferably, the energy storage system compartment 3 further includes a second liquid cooling unit 37 and a second dehumidifier air conditioner 38. The second liquid cooling unit is disposed in the fifth storage compartment 313, and the second dehumidifier air conditioner 38 is disposed outside the fifth storage compartment 313.

[0070] The second liquid cooling and heat dissipation unit 37 is used to stably control the temperature of the second battery unit 32 in the energy storage system compartment 3 to ensure the safety of the second battery unit 32. Specifically, a liquid cooling pipe or a liquid cooling plate connected to the second liquid cooling and heat dissipation unit 37 is provided in the fourth storage compartment 312, so that the second liquid cooling and heat dissipation unit 37 has the function of cooling the second battery unit 32 to ensure the safety of the second battery unit 32.

[0071] The second dehumidifier air conditioner 38 is used to control the humidity in the energy storage system cabin 3 to ensure the operating environment in the energy storage system cabin 3. In addition, the second dehumidifier air conditioner 38 can also heat the cabin at low temperatures to ensure the smooth operation of various devices in the energy storage system cabin 3.

[0072] Preferably, the energy storage system cabin 3 further includes a second fire fighting unit 39 to further ensure the safety of the energy storage system cabin 3. Preferably, the second fire fighting unit 39 is a three-level fire fighting system to effectively ensure the fire fighting safety in the cabin. Optionally, the second fire fighting unit 39 includes a fire fighting liquid made of perfluorohexanone.

[0073] Preferably, the energy storage system compartment 3 further includes a cable reel 310. The provision of the cable reel 310 increases the external power supply range and the charging range of the mobile energy storage device in this embodiment, and is more suitable for different power usage scenarios.

[0074] Preferably, the mobile energy storage device in this embodiment further includes a solar panel 5 for converting solar energy into electrical energy. The solar panel 5 can be folded and arranged on the top of the frame 1, and the solar panel 5 is electrically connected to the converter unit 33. Therefore, when the vehicle stops, the solar panel 5 can be unfolded, and photovoltaic power generation is used to transmit electrical energy to the first battery unit 22 in the battery compartment 2 and the second battery unit 32 in the energy storage system compartment 3 through the converter unit 33.

[0075] Furthermore, the solar cell panel 5 is electrically connected to the converter unit 332 , so that the electric energy is transmitted to the first battery unit 22 in the battery compartment 2 and the second battery unit 32 in the energy storage system compartment 3 through the converter unit 332 .

[0076] Preferably, the solar panel 5 is a flexible solar panel 5 for easy folding.

[0077] Preferably, the unfolded area of ​​the solar panel 5 is larger than the area of ​​the frame 1. Therefore, the unfolded solar panel 5 also has the function of sheltering from rain, which is further beneficial to the protection of the battery compartment 2 and the energy storage system compartment 3 on the frame 1.

[0078] Furthermore, a plurality of telescopic rods 7 are arranged in parallel on the top of the vehicle frame 1. One end of the telescopic rod 7 is arranged on one side of the vehicle frame 1, and the other end of the telescopic rod 7 is telescopic in the width direction of the vehicle frame 1. The solar panel 5 is fixedly arranged on the telescopic rod 7. The telescopic rod 7 can drive the solar panel 5 to fold when it is extended. In addition, the arrangement of the telescopic rod 7 also has the function of carrying the solar panel, which is conducive to enhancing the stability and reliability of the solar panel 5.

[0079] Along the outer circumference of the solar panel 5, detachable or retractable support rods 6 are arranged at intervals. The support rods 6 are connected to the solar panel 5. The support rods 6 are used to support the solar panel 5. Taking the retractable support rods 6 as an example, since the support rods 6 are retractable, the applicability can be adjusted according to the angle of sunlight, ensuring that the solar panel 5 can receive as much light as possible to obtain better power generation efficiency.

[0080] Along the length direction of the frame 1, the first box body 21 and the second box body 31 are provided with a plurality of side doors 8. The provision of the side doors 8 is convenient for the early equipment installation, the later maintenance of the units and equipment in the cabin, and is also beneficial to the safety of personnel during operation and maintenance.

[0081] It can be seen from the above technical solution that the mobile energy storage provided by this embodiment has the following advantages and beneficial implementation effects.

[0082] The battery compartment 2 and the energy storage system compartment 3 can be detachably loaded on the frame 1, so as to quickly reach the power consumption scene and provide electric energy. By setting the battery compartment 2 and the energy storage system compartment 3, the mobile energy storage device of this embodiment can effectively meet the requirements of different power consumption scenes and different power facilities, and can quickly form energy storage devices of various sizes according to actual needs to provide power supply services to the outside. Battery units are provided in the battery compartment 2 and the energy storage system compartment 3, which replace the traditional diesel power supply, effectively reduce the generation of air pollution, and have good environmental protection. And by setting the various units in the battery compartment 2 and the energy storage system compartment 3, the safety of the battery units in the compartment is effectively guaranteed.

[0083] By providing the solar panel 5, solar energy can be used to supplement the battery compartment 2 and the energy storage system compartment 3, which is energy-saving and environmentally friendly. And by providing the support rod 6 and the telescopic rod 7, the solar panel 5 can better fully absorb solar energy.

[0084] The provision of the side door 8 facilitates the installation and maintenance of the various units and equipment in the battery compartment 2 and the energy storage system compartment 3 .

[0085] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0086] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A mobile energy storage device, characterized in that: include: Frame; A battery compartment, comprising a first box body and a first battery unit, wherein the first battery unit is disposed in the first box body, and the first box body is detachably disposed on the vehicle frame; an energy storage system compartment, arranged in parallel with the battery compartment, the energy storage system compartment comprising a second box, a second battery unit and a converter unit, the second battery unit and the converter unit are arranged in the second box, and the second box is detachably arranged on the frame, and the converter unit is electrically connected to the second battery unit; as well as A connecting assembly is detachably disposed between the battery compartment and the energy storage system compartment, and electrically connects the battery compartment and the energy storage system compartment.

2. The mobile energy storage device according to claim 1, characterized in that: The first box body and the second box body are containers of standard size.

3. The mobile energy storage device according to claim 1, characterized in that: The battery compartment includes a first liquid-cooling heat dissipation unit, the first box body includes a first storage compartment and a second storage compartment that are separated, the first battery unit is arranged in the first storage compartment, and the first liquid-cooling heat dissipation unit is arranged in the second storage compartment.

4. The mobile energy storage device according to claim 3, characterized in that: The battery compartment further includes a first fire fighting unit and a first dehumidifier air conditioner, wherein the fire fighting unit is arranged in the second storage compartment and the first dehumidifier air conditioner is arranged outside the second storage compartment.

5. The mobile energy storage device according to claim 1, characterized in that: The second box body includes a third storage compartment, a fourth storage compartment and a fifth storage compartment which are separated in sequence, the converter unit is arranged in the third storage compartment, the second battery unit is arranged in the fourth storage compartment, and the second liquid cooling unit is arranged in the fifth storage compartment.

6. The mobile energy storage device according to claim 5, characterized in that: The energy storage system cabin includes a control unit, a charging unit and a transformer unit, the control unit is electrically connected to the charging unit, the transformer unit and the current conversion unit, the transformer unit is electrically connected to the second battery unit, the charging unit and the transformer unit are arranged in the third storage cabin, and the control unit is arranged in the fourth storage cabin or the third storage cabin.

7. The mobile energy storage device according to claim 5, characterized in that: The energy storage system cabin also includes a second dehumidifier air conditioner, which is arranged on the outside of the fifth storage cabin.

8. The mobile energy storage device according to any one of claims 1 to 7, characterized in that: The mobile energy storage device comprises a solar panel for converting solar energy into electrical energy. The solar panel can be folded and arranged on the top of the frame. The solar panel is electrically connected to the converter unit.

9. The mobile energy storage device according to claim 8, characterized in that: The unfolded area of ​​the solar cell panel is larger than the area of ​​the vehicle frame.

10. The mobile energy storage device according to claim 8, characterized in that: Removable or retractable support rods are arranged at intervals on the periphery of the solar cell panel. The support rods are connected to the solar cell panel and are used to support the solar cell panel.

11. The mobile energy storage device according to claim 10, characterized in that: A plurality of telescopic rods are arranged in parallel on the top of the frame, one end of the telescopic rod is arranged on one side of the frame, and the other end of the telescopic rod is telescopic along the width direction of the frame. The solar panel is fixed on the telescopic rod, and the telescopic rod is extended and retracted to drive the solar panel to be folded.

12. The mobile energy storage device according to any one of claims 1 to 7, characterized in that: The electric capacity of the first battery cell is greater than the electric capacity of the second battery cell.

13. The mobile energy storage device according to claim 12, characterized in that: The capacity of the first battery unit is 2200-2600 KWh, and the capacity of the second battery unit is 1000-1400 KWh.

14. The mobile energy storage device according to claim 1, characterized in that: The first box body and the second box body are provided with a plurality of side doors along the length direction of the frame.

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