Multi-energy mobile energy storage frequency modulation system based on lithium titanate battery and multi-energy mobile energy storage tool

Abstract

The invention discloses a multi-energy mobile energy storage frequency modulation system based on a lithium titanate battery. The system comprises a container; a control system, an energy storage inverter module, an energy storage module and a diesel generator module are arranged in the container; a photovoltaic power generation module is arranged at the top of the container; the control system is connected with the energy storage module and is used for acquiring real-time temperature information of each single battery cell in the energy storage module and recording and analyzing the real-time temperature information; the photovoltaic power generation module is connected with the energy storage module; the energy storage inverter module is connected with the energy storage module; a diesel generator module; the energy storage module is an energy storage module based on a lithium titanate battery. According to the invention, the problems of battery attenuation, low safety, low quick charge and discharge efficiency, weak environmental adaptability, long service life, low reliability and the like of existing industrial and commercial user side energy storage can be overcome, quick deployment of the mobile energy storage frequency modulation system can be realized, the charge and discharge efficiency of the industrial and commercial user side energy storage frequency modulation system is improved, and the service life and the reliability of equipment are improved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a multi-energy mobile energy storage frequency modulation system and a multi-energy mobile energy storage tool based on a lithium titanate battery. Background Art

[0002] Energy storage technology is developing rapidly. The development of energy storage on the industrial and commercial user side can not only provide enterprises with backup power supplies and voltage-stabilized power supplies to ensure stable production, but also help to reduce costs and increase efficiency based on existing electricity price policies.

[0003] Among them, in order to quickly meet the charging needs of electric vehicles, China has built a large number of high-speed charging pile networks, covering cities, highways and other important transportation nodes.

[0004] At present, the construction and operation of existing industrial and commercial user-side energy storage systems have the following problems:

[0005] 1. Battery degradation and thermal management issues: Failure to provide an effective temperature management system. An effective temperature management system can improve energy storage efficiency, extend battery life, and ensure safe operation of the system.

[0006] 2. Safety issues: There are battery fire risks, electrolyte leakage and other issues. Battery fire risks, electrolyte leakage and other issues must be properly addressed to ensure the safe operation of energy storage systems in industrial and commercial environments.

[0007] 3. Low charging and discharging efficiency: Only by improving the fast charging capability and discharging efficiency of the energy storage system can we meet the needs of the industrial and commercial fields for rapid response and high efficiency.

[0008] 4. Weak environmental adaptability: The system cannot be effectively charged and discharged in a low-temperature environment. Customers require that the energy storage system can be effectively charged and discharged in a low-temperature environment to improve the environmental adaptability of the energy storage system.

[0009] 5. Lifespan and reliability issues: Existing energy storage equipment has a short lifespan and insufficient reliability. Since the lifespan and reliability of energy storage equipment cannot be guaranteed, the long-term stable operation of the energy storage system is affected.

[0010] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the invention

[0011] The purpose of the present invention is to provide a multi-energy mobile energy storage frequency modulation system and a multi-energy mobile energy storage tool based on lithium titanate batteries in view of the technical defects in the prior art.

[0012] To this end, the present invention provides a multi-energy mobile energy storage and frequency modulation system based on lithium titanate batteries, which includes: a container, a control system, an energy storage inverter module, an energy storage module, a photovoltaic power generation module and a diesel generator module;

[0013] The hollow container is equipped with a control system, an energy storage inverter module, an energy storage module and a diesel generator module;

[0014] A photovoltaic power generation module is provided on the top of the container;

[0015] The control system is connected to the energy storage module and is used to collect the real-time temperature information of each single cell in the energy storage module and record and analyze it;

[0016] The photovoltaic power generation module is connected to the energy storage module and is used to convert solar energy into electrical energy and output it to the energy storage module to charge the energy storage module;

[0017] An energy storage inverter module, connected to the energy storage module, is used to convert the electric energy stored in the energy storage module into alternating current and feed it to external electrical equipment;

[0018] Diesel generator module, used to output electrical energy to external electrical equipment by burning diesel;

[0019] Among them, the energy storage module is an energy storage module based on lithium titanate batteries;

[0020] The energy storage module is used to store the externally charged electric energy in real time, and output the electric energy to the external electric equipment according to the demand of the external electric equipment.

[0021] In addition, the present invention provides a multi-energy mobile energy storage tool, which includes the multi-energy mobile energy storage frequency modulation system based on lithium titanate battery as described above, and a semi-trailer;

[0022] A multi-energy mobile energy storage and frequency modulation system based on lithium titanate batteries is installed on the top of the semi-trailer.

[0023] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a multi-energy mobile energy storage and frequency modulation system and a multi-energy mobile energy storage tool based on lithium titanate batteries, which are scientifically designed and can overcome the problems of battery attenuation, safety, low fast charging and discharging efficiency, weak environmental adaptability, life and reliability existing in the existing industrial and commercial user-side energy storage. It can realize the rapid deployment of mobile energy storage and frequency modulation systems, improve the charging and discharging efficiency of industrial and commercial user-side energy storage and frequency modulation systems, and improve the life and reliability of equipment, which has great practical significance.

[0024] The application of the present invention is helpful to reduce the requirements of the industrial and commercial user-side energy storage system for the construction of basic charging facilities (such as charging pile networks). BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the front structure of a multi-energy mobile energy storage and frequency modulation system based on a lithium titanate battery provided by the present invention;

[0026] Figure 2 A top view of a multi-energy mobile energy storage and frequency modulation system based on a lithium titanate battery provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of a multi-energy mobile energy storage tool provided by the present invention, that is, a schematic diagram of the matching transportation state of a multi-energy mobile energy storage frequency modulation system based on a lithium titanate battery and a semi-trailer;

[0028] In the figure, 1-control system; 2-energy storage inverter module; 3-energy storage module; 4-photovoltaic power generation module; 5-diesel generator module;

[0029] 6-Support balance system; 7-Universal charging and discharging interface; 8-Convergence module; 9-Environmental temperature control system; 10-Safety fire protection system;

[0030] 20-Container; 30-Semi-trailer; 40-Multi-energy mobile energy storage and frequency regulation system based on lithium titanate batteries; 50-Tractor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0034] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] See also Figure 1 to Figure 2 The present invention provides a multi-energy mobile energy storage and frequency modulation system based on lithium titanate batteries, comprising: a container 20, a control system 1, an energy storage inverter module (PCS) 2, an energy storage module 3, a photovoltaic power generation module 4 and a diesel generator module 5;

[0036] A control system 1, a power storage inverter module (PCS) 2, a power storage module 3 and a diesel generator module 5 are arranged in the hollow container 20;

[0037] A photovoltaic power generation module 4 is provided on the top of the container 20;

[0038] The control system 1 is connected to the energy storage module 3 and is used to collect the real-time temperature information of each single cell in the energy storage module 3 and record and analyze it;

[0039] The photovoltaic power generation module 4 is connected to the energy storage module 3 and is used to convert solar energy into electrical energy and output it to the energy storage module 3 to charge the energy storage module 3;

[0040] The energy storage inverter module (PCS) 2 is connected to the energy storage module 3 and is used to convert the electric energy stored in the energy storage module 3 into alternating current, and feed it to external power consumption equipment (such as power consumption equipment in a household power grid or an industrial power grid) to meet different types of power demands;

[0041] The diesel generator module 5 is used to output electric energy to external electric devices (such as electric devices in a household power grid or an industrial power grid) by burning diesel;

[0042] Among them, energy storage module 3 is an energy storage module based on lithium titanate battery;

[0043] The energy storage module 3 is used to store the externally charged electric energy in real time, and output the electric energy to the external electric device (such as the electric device in the household power grid or the industrial power grid) according to the demand of the external electric device.

[0044] In the present invention, in a specific implementation, the control system 1 is used to compare the real-time temperature information of each single battery cell it collects with a preset temperature safety threshold. When the temperature is greater than the temperature safety threshold, it is determined that there is a safety hazard in the energy storage module 3 and an alarm prompt (such as an audible and visual alarm) is issued.

[0045] In specific implementation, the control system 1 may be an existing industrial computer (with a display screen).

[0046] It should be noted that, for the present invention, the temperature of each single cell in the energy storage module 3 can be collected, detected, analyzed, and pre-judged through the control system 1, so as to achieve prevention first. Among them, the energy storage module 3 has its own BMS system (battery management system), which is connected to the control system 1 in communication, and the BMS system is used to send the temperature information of each single cell in the energy storage module 3 to the control system 1 in real time.

[0047] In the present invention, in a specific implementation, the container 20 is a container with a length of 40 feet or 20 feet.

[0048] In the present invention, in specific implementation, the energy storage module 3 is an energy storage module based on a lithium titanate battery;

[0049] In specific implementation, the energy storage module 3 includes a plurality of battery modules;

[0050] Multiple battery modules are connected in parallel, in series, or in series-parallel.

[0051] Each battery module includes a plurality of single cells, and the plurality of single cells are connected in parallel, in series, or in series-parallel (ie, a combination of series and parallel).

[0052] It should be noted that, for the energy storage module, the specific manner of connecting multiple battery modules in series, in parallel, and in series-parallel connection is an existing conventional known technology, which will not be described in detail here. At the same time, for the battery module, the specific manner of connecting multiple single cells in series, in parallel, and in series-parallel connection is an existing conventional known technology, which will not be described in detail here.

[0053] It should be noted that the present invention adopts an energy storage module based on lithium titanate batteries. Lithium titanate batteries have the characteristics of high energy density, high rate discharge characteristics, high safety, etc., and can be quickly charged at a high rate according to the allowable charging rate of the electrical equipment.

[0054] In addition, the energy storage modules based on lithium titanate batteries are resistant to high and low temperatures and can be deployed in cold regions such as Northeast China to meet the needs of fast charging in low temperature environments and improve environmental adaptability. In addition, the high life performance of the energy storage modules based on lithium titanate batteries can meet the high life and high reliability requirements of the energy storage frequency modulation system.

[0055] In the present invention, in specific implementation, a supporting and balancing system 6 is provided at the bottom of the container 20;

[0056] The supporting balance system 6 is used to maintain the stability of the container 20 .

[0057] It should be noted that the supporting and balancing system 6 can adopt a vehicle body balancing and supporting system with mature existing technology to ensure the stable passability of the container 20 when passing through a rough road section. For example, the supporting and balancing system 6 can include a plurality of (for example, 4) existing common electric outriggers or hydraulic outriggers, which are respectively located at the four corners of the bottom of the container to balance and stabilize the existing container.

[0058] In the present invention, in specific implementation, a universal charging and discharging interface (including accessories) 7 is provided on the side of the container 20;

[0059] The energy storage module 3 is connected to the universal charging and discharging interface (including accessories) 7, and outputs electric energy to external electrical equipment (such as electrical equipment in a household power grid or an industrial power grid) through the universal charging and discharging interface (including accessories) 7, or receives and stores electric energy charged from the external power grid.

[0060] In the present invention, in specific implementation, the present invention further includes: a confluence module 8;

[0061] The confluence module 8 is connected to the energy storage module 3, the photovoltaic power generation module 4 and the diesel generator module 5, respectively, and is used to converge the currents output by the energy storage module 3, the photovoltaic power generation module 4 and the diesel generator module 5, and output them to external electrical equipment (such as electrical equipment in a household power grid or an industrial power grid).

[0062] In a specific implementation, the confluence module 8 outputs electric energy to external electrical equipment (such as electrical equipment in a household power grid or an industrial power grid) through a universal charging and discharging interface (including accessories) 7 .

[0063] It should be noted that, in specific implementation, the confluence module 8 can be a confluence cabinet in a mature energy storage system in the prior art, which is used to collect the currents of multiple power sources (such as energy storage modules and photovoltaic power generation components) to form one or more larger current outputs for subsequent inversion, grid connection or direct power supply. In addition, it is helpful to reduce the number of cables and simplify the overall structure.

[0064] In the present invention, in specific implementation, the present invention further includes: an ambient temperature control system 9;

[0065] The ambient temperature control system 9 is installed on the container 20 and is used to adjust and control the ambient temperature inside the container 20 .

[0066] It should be noted that, in specific implementation, the ambient temperature control system 9 can be an existing air-conditioning system with heating and cooling functions, the indoor unit of the air-conditioning system is installed inside the container 20, and the outdoor unit is installed on the top of the container 20. Of course, the ambient temperature control system 9 can also be an existing system with other temperature adjustment functions, which is a mature technology in the prior art and will not be described here. For the present invention, the ambient temperature control system can achieve precise control of the energy storage system environment.

[0067] In the present invention, in specific implementation, the present invention further includes: a safety fire protection system 10;

[0068] The safety fire protection system 10 is installed on the container 20, and is used to monitor the fire situation inside the container 20 in real time, issue an alarm in real time when a fire occurs, and take corresponding fire protection measures (for example, start the foam fire extinguishing equipment in the system, spray the foam fire extinguishing agent, quickly cover the fire source, reduce the fire, and isolate the air to prevent the fire from spreading)

[0069] It should be noted that, in specific implementation, the safety fire protection system can set an active safety warning strategy to achieve package-level detection and package-level eruption, so as to accurately suppress fire hazard points and improve the safety of the energy storage frequency modulation system. The safety fire protection system is a mature system with existing technology and has been widely used in the field of fire protection, so it will not be described in detail here.

[0070] It should be noted that, for the system of the present invention, a container is used as a carrier, a photovoltaic power generation module is arranged on the top, a mains interface (i.e., a universal charging and discharging interface 7), a confluence module, an energy storage inverter module (PCS), and an energy storage module based on a lithium titanate battery are arranged inside, and the energy storage module can be charged by the photovoltaic power generation module or the mains during the low electricity consumption period to earn the difference in electricity price;

[0071] For the present invention, based on the energy storage module, photovoltaic power generation module and diesel power generation module, the three energy sources of electric energy converted from battery chemical energy, electric energy converted from light energy and electric energy converted from fuel chemical energy can be reasonably switched to ensure the uninterrupted energy supply, realize all-weather rapid charging and discharging, reduce operating costs and realize operator profitability; the system of the present invention has high-rate discharge characteristics and frequency modulation function, and performs system frequency modulation through high-rate charging and discharging and PCS, thereby improving the quality of electricity, enhancing the service life and reliability of the company's precision equipment with high electricity quality, and realizing the function of a dynamic voltage recovery device (DVR).

[0072] Based on the multi-energy mobile energy storage frequency modulation system based on lithium titanate battery provided by the present invention, see Figure 3 As shown, the present invention also provides a multi-energy mobile energy storage tool, including the multi-energy mobile energy storage frequency modulation system based on lithium titanate battery as described above, and a semi-trailer 30;

[0073] A multi-energy mobile energy storage and frequency modulation system 40 based on lithium titanate batteries is arranged on the top of the semi-trailer 30 .

[0074] In the present invention, in a specific implementation, the traction end of the semi-trailer 30 is connected to the tractor (ie, the carrier) 50 .

[0075] In the present invention, in terms of specific implementation, the multi-energy mobile energy storage and frequency modulation system based on lithium titanate batteries and the highly maneuverable semi-trailer 30 (flatbed semi-trailer) provided by the present invention are split designs, which can realize overall maneuverability and deployment, and can also be used as a mobile platform. The support and balance system set up by the container itself can realize rapid deployment under complex ground conditions, greatly reducing the construction cost of infrastructure, and realizing rapid connection between equipment through standard aviation plugs, realizing the rapid development of the energy storage and frequency modulation system, so that enterprises can reduce costs and increase efficiency, and at the same time, they can arbitrage peak and valley price differences to improve economic efficiency.

[0076] It should be noted that, for the system of the present invention, when deployed on site, it is transported to a designated location by a vehicle, and the support and balance system provided on the container can realize adjustment of the container on an uneven road surface, thereby realizing rapid deployment in a short time. The universal charging and discharging interface 7 is provided with a standard universal charging and discharging aviation socket and a cable with a universal aviation plug for rapid connection, thereby ensuring that the energy storage and frequency modulation system function is quickly turned on, and meeting the energy charging and discharging needs of different regions and cities during peak and valley times of electricity consumption.

[0077] For the system of the present invention, when performing mobile migration, the container can be hoisted onto the flatbed semi-trailer through a high-mobility flatbed semi-trailer (equipped with a carrier), and the supporting and balancing system of the container itself can be withdrawn to achieve rapid and mobile migration;

[0078] In addition, the system of the present invention uses a container as a carrier, and is equipped with a storage inverter module (PCS) and a diesel generator set as a backup power supply, which can ensure the continuous discharge of energy in the emergency rescue environment and meet the electricity needs of rescue equipment and living conditions.

[0079] In summary, the present invention is used in the field of user-side mobile rapid deployment of mobile energy storage and frequency regulation technology. By applying the present invention, enterprises can participate in the electricity marketization, provide fast and efficient electricity services, and help solve problems such as poor grid quality and high electricity costs during peak electricity consumption periods. At the same time, it can also earn electricity price differences during low electricity consumption periods.

[0080] Compared with the prior art, the multi-energy mobile energy storage frequency modulation system and multi-energy mobile energy storage tool based on lithium titanate battery provided by the present invention have the following beneficial effects:

[0081] 1. The system of the present invention has high-rate discharge characteristics, and cooperates with PCS to have frequency modulation function, improves power quality, meets the user-side enterprise's demand for high-quality precision equipment service life and reliability, and realizes the function of dynamic voltage recovery device (DVR);

[0082] 2. The lithium titanate battery of the system of the present invention has high safety. At the same time, an environmental temperature control system, a safety fire protection system and a control system are set up, which can predict and suppress battery fire risks, electrolyte leakage and other problems, and ensure the safe operation of the energy storage system in the use environment of industrial and commercial users.

[0083] 3. The system of the present invention has the characteristics of high and low temperature resistance and strong environmental adaptability. It can be deployed in cold areas such as Northeast China to meet the needs of fast charging and discharging in low temperature environments.

[0084] 4. The system of the present invention is based on the long life characteristics of the energy storage module of the lithium titanate battery, which meets the high life and high reliability of the energy storage frequency modulation system;

[0085] 5. The system of the present invention is designed as a split body with a highly maneuverable semi-trailer (with a supporting vehicle), and the whole can be quickly moved to improve the maneuverability of energy security. At the same time, it can be arranged separately. By setting a support and balance system on the container, it can be quickly deployed in complex terrain to meet the energy security under complex road conditions or emergency rescue conditions;

[0086] 6. The system of the present invention is provided with a photovoltaic power generation module and a mains interface (i.e., a universal charging and discharging interface 7), which can earn the price difference of electricity or reduce the cost of electricity through photovoltaic or electricity consumption trough; at the same time, the three energy sources can be reasonably switched to ensure the uninterrupted energy and realize all-weather energy guarantee;

[0087] 7. The system of the present invention is provided with a diesel generator module (i.e., a diesel generator set) as a backup power source to ensure continuous discharge of energy in the emergency rescue environment and meet the power demand of rescue equipment and living conditions;

[0088] 8. The application of the present invention is conducive to overcoming the requirements of traditional fixed energy storage cabinets for the foundation ground. The system of the present invention uses containers as carriers to set up a balance system, which can be quickly deployed in emergency complex terrain without the need for infrastructure construction.

[0089] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-energy mobile energy storage and frequency modulation system based on lithium titanate batteries, characterized in that: include: A container (20), a control system (1), an energy storage inverter module (2), an energy storage module (3), a photovoltaic power generation module (4) and a diesel generator module (5); A control system (1), an energy storage inverter module (2), an energy storage module (3) and a diesel generator module (5) are arranged in the hollow container (20); A photovoltaic power generation module (4) is arranged on the top of the container (20); A control system (1) is connected to the energy storage module (3) and is used to collect real-time temperature information of each single cell in the energy storage module (3) and record and analyze it; A photovoltaic power generation module (4) is connected to the energy storage module (3) and is used to convert solar energy into electrical energy and output the electrical energy to the energy storage module (3) to charge the energy storage module (3); An energy storage inverter module (2) is connected to the energy storage module (3) and is used to convert the electric energy stored in the energy storage module (3) into alternating current and feed it to external electrical equipment; A diesel generator module (5) is used to output electrical energy to external electrical equipment by burning diesel; Wherein, the energy storage module (3) is an energy storage module based on a lithium titanate battery; The energy storage module (3) is used to store externally charged electric energy in real time, and output electric energy to external electric equipment according to the needs of the external electric equipment.

2. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery according to claim 1, characterized in that: The control system (1) is used to compare the real-time temperature information of each single battery cell collected by it with a preset temperature safety threshold value, and when the temperature is greater than the temperature safety threshold value, it is determined that there is a safety hazard in the energy storage module (3) and an alarm is issued.

3. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery according to claim 1 is characterized in that: The bottom of the container (20) is provided with a supporting and balancing system (6); The supporting balance system (6) is used to maintain the stability of the container (20).

4. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery according to claim 1, characterized in that: A universal charging and discharging interface (7) is provided on the side of the container (20); The energy storage module (3) is connected to the universal charging and discharging interface (7), and outputs electric energy to external electric equipment through the universal charging and discharging interface (7), or receives and stores electric energy charged from an external power grid.

5. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery according to claim 1, characterized in that: Also includes: Convergence module (8); The confluence module (8) is connected to the energy storage module (3), the photovoltaic power generation module (4) and the diesel generator module (5) respectively, and is used to converge the currents respectively output by the energy storage module (3), the photovoltaic power generation module (4) and the diesel generator module (5) and output them to external electrical equipment.

6. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery as claimed in claim 5, characterized in that: The confluence module (8) outputs electric energy to external electric equipment via the universal charging and discharging interface (7).

7. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery according to claim 1, characterized in that: Also includes: Environmental temperature control system (9); The ambient temperature control system (9) is installed on the container (20) and is used to adjust and control the ambient temperature inside the container (20).

8. The multi-energy mobile energy storage and frequency modulation system based on lithium titanate battery according to claim 1, characterized in that: Also includes: Safety fire protection system (10); The safety fire protection system (10) is installed on the container (20) and is used to monitor the fire situation inside the container (20) in real time, issue an alarm in real time when a fire occurs, and take corresponding fire protection measures.

9. A multi-energy mobile energy storage tool, characterized in that: It comprises a multi-energy mobile energy storage and frequency modulation system based on a lithium titanate battery as claimed in any one of claims 1 to 8, and a semi-trailer (30); A multi-energy mobile energy storage and frequency modulation system (40) based on lithium titanate batteries is arranged on the top of the semitrailer (30).

10. The multi-energy mobile energy storage tool according to claim 9, characterized in that: The traction end of the semitrailer (30) is connected to the tractor (50).

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