Mobile energy storage system

Abstract

The utility model belongs to the technical field of mobile energy storage, and aims to provide a mobile energy storage system which comprises a whole vehicle control module, an energy storage module, a high-voltage distribution box, a vehicle end power supply module and an external power supply module, the energy storage module, the vehicle end power supply module, the external power supply module and the high-voltage distribution box are all in communication connection with the whole vehicle control module, and the energy storage module is electrically connected with the vehicle end power supply module and the external power supply module through the high-voltage distribution box. The vehicle end power supply module is used for providing power support for a vehicle end load, and the external power supply module is used for providing alternating current and direct current for an external load. The mobile energy storage device can be used for vehicle end power supply, user end discharge and power grid end feed, can store energy in a mobile manner, and is wide in application scene.

Description

Technical Field

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

[0002] As the installed capacity of renewable energy continues to increase, the dispatching and management of distribution networks has become more difficult. At the same time, as the number of electric vehicles continues to increase, car owners generally face problems such as few charging piles and long charging times. For this reason, electrochemical energy storage systems have emerged.

[0003] At present, electrochemical energy storage systems are mainly divided into cabinet energy storage systems and container energy storage systems according to different installation forms. Among them, the cabinet energy storage system is also called an energy storage cabinet, which mainly includes energy storage batteries, power modules, main control modules, communication modules and fire protection modules. They work together to complete the functions of the energy storage cabinet. The energy storage cabinet has a wide range of application scenarios, including power grid energy storage, electric vehicles, renewable energy and other fields, which provides strong support for energy storage and utilization; the container energy storage system is an integrated energy storage system developed for the energy storage market demand. It integrates battery cabinets, battery management systems and container dynamic environment monitoring systems, and can integrate energy storage inverters and energy management systems according to user needs. The container energy storage system has the characteristics of simplified infrastructure construction costs, short construction period, high degree of modularization, easy transportation and installation, etc. It can be used in thermal, wind, solar power and other power stations or islands, communities, schools, scientific research institutions, factories, large load centers and other applications. In addition, in order to meet the needs of mobile applications of energy storage systems, a number of self-driving charging vehicles have gradually appeared on the market.

[0004] However, in the process of using the prior art, the inventors found that the prior art has at least the following problems:

[0005] The problems with cabinet-type energy storage systems and container-type energy storage systems are as follows: they usually require a certain amount of site resources, are not easy to move, and have poor flexibility; during use, they are mostly used as backup power sources in factories, hospitals, scientific research, communities, and other areas, and their applications are limited. The problems with self-driving charging cars are as follows: they usually cannot be driven on the road and are limited to closed areas; due to their own power limitations, they can only charge small electric vehicles, and the application scenarios are relatively single. Utility Model Content

[0006] In order to solve the above technical problems at least to a certain extent, the utility model provides a mobile energy storage system.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A mobile energy storage system comprises a vehicle control module, an energy storage module, a high-voltage distribution box, a vehicle-end power supply module and an external power supply module, wherein the energy storage module, the vehicle-end power supply module, the external power supply module and the high-voltage distribution box are all communicatively connected with the vehicle control module, the energy storage module is electrically connected with the vehicle-end power supply module and the external power supply module through the high-voltage distribution box, the vehicle-end power supply module is used to provide power support to the vehicle-end load, and the external power supply module is used to provide AC and DC power to an external load.

[0009] In one possible design, the vehicle-end power supply module includes a power distribution module and a first DC-DC conversion module, the power distribution module and the first DC-DC conversion module are both communicatively connected to the vehicle control module, the input end of the power distribution module is electrically connected to the output end of the high-voltage distribution box, and the output end of the power distribution module is electrically connected to the first DC-DC conversion module.

[0010] In one possible design, the vehicle-end load includes a motor controller and a drive motor, the motor controller is communicatively connected to the vehicle control module, and the drive motor is electrically connected to the output end of the power distribution module through the motor controller.

[0011] In a possible design, the vehicle-end load also includes an electric compressor and an electric heater, both of which are communicatively connected to the vehicle control module, and both of which are electrically connected to the output end of the power distribution module.

[0012] In a possible design, the vehicle-end load also includes a communication module and a display module, and both the communication module and the display module are communicatively connected to the vehicle control module.

[0013] In one possible design, the external power supply module includes an energy storage inverter and a second DC-DC conversion module, the energy storage inverter and the second DC-DC conversion module are both communicatively connected to the vehicle control module, and the energy storage inverter and the second DC-DC conversion module are both electrically connected to the high-voltage distribution box.

[0014] In one possible design, the external power supply module also includes an AC interface and a DC charging gun, the AC interface is electrically connected to the high-voltage distribution box through the energy storage inverter, and the DC charging gun is electrically connected to the high-voltage distribution box through the second DC-DC conversion module.

[0015] In one possible design, the external power supply module also includes a slow charging interface and a fast charging interface. The slow charging interface stores energy for the energy storage module through the energy storage inverter, and the fast charging interface stores energy for the energy storage module through the second DC-DC conversion module.

[0016] The beneficial effects of the utility model are concentrated in that it can be used for vehicle-side power supply, user-side discharge and grid-side power feeding, and can be used for mobile energy storage, with a wide range of application scenarios. Specifically, the utility model organically integrates the energy storage module with the electric vehicle. During the implementation process, the other modules are controlled by the vehicle control module. The energy storage module can provide power support to the vehicle-side load based on the vehicle-side power supply module, and can provide power support to the external load based on the external power supply module. It can also realize the grid connection function, so that the utility model can meet the power demand of different scenarios such as user power supplement, building power supply, backup power supply, grid feedback, etc., and can be moved according to different needs. It has a wide range of application scenarios and can play an important role in peak shaving and valley filling on the grid side and improving its operating stability, which is conducive to alleviating the user's anxiety about power supplement and is suitable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a module block diagram of a mobile energy storage system in an embodiment. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0019] Embodiment 1:

[0020] like Figure 1 As shown, this embodiment provides a mobile energy storage system, including a vehicle control module (not shown in the figure), an energy storage module, a high-voltage distribution box, a vehicle-end power supply module and an external power supply module, the energy storage module, the vehicle-end power supply module, the external power supply module and the high-voltage distribution box are all communicatively connected to the vehicle control module, the energy storage module is electrically connected to the vehicle-end power supply module and the external power supply module through the high-voltage distribution box, the vehicle-end power supply module is used to provide power support to the vehicle-end load, and the external power supply module is used to provide AC and DC power to the external load.

[0021] It should be understood that, in this embodiment, the body of the mobile energy storage system should meet the basic functional and technical requirements of electric vehicle regulations, driving, braking and safety, and mainly serve as a transportation carrier in the energy storage system.

[0022] The external power supply module can output AC and DC power to the outside, wherein the output AC power can be fed back to the power grid or used in an isolated grid, and the DC power can be used to charge new energy vehicles.

[0023] This embodiment can be used for vehicle-side power supply, user-side discharge and grid-side power feeding. It can store energy in a mobile manner and has a wide range of application scenarios. Specifically, this embodiment organically integrates the energy storage module with the electric vehicle. During the implementation process, the vehicle control module controls other modules. The energy storage module can provide power support to the vehicle-side load based on the vehicle-side power supply module, and can provide power support to the external load based on the external power supply module. It can also realize the grid connection function, so that this embodiment can meet the power demand of different scenarios such as user power supplement, building power supply, backup power supply, grid feedback, etc., and can be moved according to different needs. It has a wide range of application scenarios and can play an important role in peak shaving and valley filling on the grid side and improving its operating stability. It is conducive to alleviating the user's anxiety about power supplement and is suitable for promotion and use.

[0024] In this embodiment, the mobile energy storage system also includes a high-voltage distribution box, which is communicatively connected to the vehicle control module, and the energy storage module is electrically connected to the vehicle-end power supply module and the external power supply module through the high-voltage distribution box.

[0025] It should be noted that, in this embodiment, the high-voltage distribution box mainly plays the role of distributing, protecting and controlling electric energy. It can receive high-voltage direct current from the energy storage module, and distribute the electric energy to the vehicle-end power supply module and the external power supply module to ensure the stable operation of the mobile energy storage system. In addition, the high-voltage distribution box also includes various protection devices, such as BMS (Battery Management System), etc., to ensure that the mobile energy storage system will not be damaged due to abnormal conditions.

[0026] In this embodiment, the vehicle-end power supply module includes a power distribution module and a first DC-DC conversion module. The power distribution module and the first DC-DC conversion module are both communicatively connected to the vehicle control module. The input end of the power distribution module is electrically connected to the output end of the high-voltage distribution box, and the output end of the power distribution module is electrically connected to the first DC-DC conversion module.

[0027] It should be noted that, in the present embodiment, the power distribution module plays a key role in connecting the energy storage module and the vehicle-end load. It provides an interface for electrically connecting the energy storage module and the vehicle-end load, so that the electric energy stored in the energy storage module can be effectively transmitted to the corresponding vehicle-end load, thereby realizing effective utilization of energy. Secondly, the power distribution module is internally provided with electrical protection elements such as fuses, circuit breakers, etc., which are used to cut off the power supply when a short circuit, overload or other fault occurs in the circuit, so as to protect the entire mobile energy storage system from damage. In addition, the power distribution module can also be integrated with control elements such as relays and switches to realize the start and stop control, circuit switching and other functions of the energy storage module and other equipment, thereby ensuring the safe and efficient transmission of electric energy, and realizing the control and management of the power supply circuit of the vehicle-end load.

[0028] The first DC-DC conversion module in this embodiment adopts a low-power DC-DC conversion module, and the first DC-DC conversion module is used to provide power support to the low-voltage load in the vehicle-end load, and the output end of the power distribution module can directly provide power support to the high-voltage load in the vehicle-end load.

[0029] In this embodiment, the vehicle-end load includes a motor controller (Motor Control Unit, MCU) and a drive motor. The motor controller is communicatively connected to the vehicle control module, and the drive motor is electrically connected to the output end of the power distribution module through the motor controller.

[0030] Specifically, in this embodiment, the motor controller and the drive motor can realize the function of vehicle operation, and the motor controller is directly powered by the energy storage module, eliminating the power battery and power supply system in the existing electric vehicle, which is conducive to saving material and management costs.

[0031] It should be noted that the motor controller is used to control the various motion states of the drive motor in the mobile energy storage system, such as starting, accelerating, decelerating and braking. During operation, it will monitor the state of the drive motor, receive signals from the vehicle control module, and control the speed, torque and other parameters of the drive motor according to these signals to ensure the efficient operation of the mobile energy storage system; the drive motor is the power source of the mobile energy storage system, which can convert electrical energy into mechanical energy to drive the mobile energy storage system. During the operation of the mobile energy storage system, the motor controller and the drive motor work closely together to jointly ensure the normal operation of the mobile energy storage system.

[0032] In this embodiment, the vehicle-end load also includes an electric compressor and an electric heater, and the electric compressor and the electric heater are both communicatively connected to the vehicle control module, and the electric compressor and the electric heater are both electrically connected to the output end of the power distribution module.

[0033] It should be noted that the electric compressor is used in the air-conditioning system in the car. It can absorb low-pressure refrigerant gas, and then increase its pressure and temperature through compression to convert it into high-pressure and high-temperature gas. Such gas dissipates heat through the condenser and becomes a high-pressure liquid. It is then reduced in pressure through the expansion valve to become a low-pressure and low-temperature liquid refrigerant, thereby cooling the air in the car to provide a comfortable ambient temperature in the car and ensure the comfort of the passengers in the car.

[0034] The electric heater can provide a comfortable temperature inside the vehicle when the ambient temperature is low, improve the driver's field of vision, and increase driving safety.

[0035] In this embodiment, the vehicle-end load may also include modules such as a body control unit, an ignition control module, an airbag module, an electronic parking brake system, and an electric power steering system that are communicatively connected to the vehicle control module, which are not limited here.

[0036] In this embodiment, the vehicle-side load also includes a communication module (not shown in the figure) and a display module (not shown in the figure), and both the communication module and the display module are connected to the vehicle control module. It should be noted that the vehicle control module can realize wireless communication with other onboard terminals and external user terminals such as mobile phones and pads through the communication module, so that this embodiment can support functions such as remote real-time monitoring and background maintenance, and facilitate wireless network management; this embodiment can also realize human-computer interaction functions based on the display module.

[0037] It should be understood that, in this embodiment, the vehicle control module, the communication module and the display module can all be powered by the energy storage module, or by dry batteries, which is not limited here.

[0038] In this embodiment, the external power supply module includes a power storage inverter (Power Conversion System, PCS) and a second DC-DC conversion module. The energy storage inverter and the second DC-DC conversion module are both communicatively connected to the vehicle control module, and the energy storage inverter and the second DC-DC conversion module are both electrically connected to the high-voltage distribution box.

[0039] It should be noted that the energy storage converter has bidirectional functions of rectification and inversion. Through rectification, the external power grid can store energy for the energy storage module, and through inversion, the energy storage module can be discharged externally (isolated grid operation) or connected to the grid.

[0040] Specifically, the energy storage converter can control the charging and discharging process of the energy storage module, perform AC / DC conversion, and can directly power external AC loads in the absence of a power grid. It can also receive external input AC power through a slow charging interface to charge the energy storage module. In this process, the energy storage converter can control the flow direction of electric energy and convert the voltage frequency, so that the mobile energy storage system in this embodiment can operate more flexibly. At the same time, the energy storage converter can also adjust the electric energy to meet the power requirements of different external loads.

[0041] In this embodiment, the second DC-DC conversion module is a high-power DC-DC conversion module, which is used to supply power to an external DC load.

[0042] In this embodiment, the external power supply module also includes an AC interface and a DC charging gun. The AC interface is electrically connected to the high-voltage distribution box through the energy storage inverter, and the DC charging gun is electrically connected to the high-voltage distribution box through the second DC-DC conversion module.

[0043] It should be noted that, in this embodiment, the electric energy output by the energy storage inverter can be transmitted to an external AC load or an external electric vehicle through the AC interface or the DC charging gun, and the electric energy output by the second DC-DC conversion module can be transmitted to an external DC load through the DC charging gun. Before charging the external load, the vehicle control module can communicate with the BMS in the external load and complete the charging task based on the charging requirements of the external load after the handshake between the two is successful. This is achieved using existing technologies and will not be elaborated here.

[0044] In this embodiment, the external power supply module also includes a slow charging interface and a fast charging interface. The slow charging interface stores energy for the energy storage module through the energy storage inverter, and the fast charging interface stores energy for the energy storage module through the second DC-DC conversion module.

[0045] It should be noted that, in the present embodiment, the energy storage module can store energy for the energy storage module through a slow charging interface or a fast charging interface and an external charging pile or an energy storage inverter to realize the charging function of the energy storage module. During this process, the externally transmitted AC power can flow to the energy storage inverter through the slow charging interface. The energy storage inverter can convert the externally transmitted AC power into DC power, and complete the charging task according to the charging requirements of the energy storage module; the externally transmitted DC power can directly charge the energy storage module through the fast charging interface. Before the energy storage module is charged, the vehicle control module can communicate with the BMS in the external load, and complete the charging task based on the charging requirements of the energy storage module after the handshake between the two is successful. The existing technology is used here for implementation and will not be elaborated here.

[0046] It should be noted that the power distribution module, the first DC-DC conversion module, the energy storage inverter and the second DC-DC conversion module in this embodiment can be designed in an integrated manner to constitute the power conversion module of the mobile energy storage system in this embodiment.

[0047] In this embodiment, the mobile energy storage system further includes a grid feed module, the grid feed module is respectively connected to the vehicle control module and the vehicle control module, the energy storage module is also electrically connected to the grid feed module, the grid feed module is used to feed power to the grid, and the grid feed module is also used to transmit the electric energy provided by the grid to the energy storage module so that the energy storage module can store energy. Specifically, in this embodiment, the grid feed module includes a bidirectional charging module, the bidirectional charging module is connected to the vehicle control module, and the bidirectional charging module is electrically connected to the high-voltage distribution box.

[0048] Specifically, in this embodiment, the energy storage inverter is an indirect interface between the mobile energy storage system and the power grid in this embodiment, which can convert the AC power output by the power grid into DC power for charging the energy storage module, or invert the surplus electric energy output by the energy storage module into AC power to feed the power grid.

[0049] It should also be noted that this embodiment is developed based on the actual needs of the discharge and grid feeding functions. Through the rational layout of engineering variables such as the carrying capacity, energy storage capacity and driving capacity of electric vehicles, there is a large room for expansion, and multifunctional mobile energy storage vehicles that can cope with different scenarios and user needs can be developed to match different scenarios and user needs, with strong scalability.

[0050] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mobile energy storage system, characterized in that: It includes a vehicle control module, an energy storage module, a high-voltage distribution box, a vehicle-end power supply module and an external power supply module. The energy storage module, the vehicle-end power supply module, the external power supply module and the high-voltage distribution box are all communicatively connected with the vehicle control module. The energy storage module is electrically connected with the vehicle-end power supply module and the external power supply module through the high-voltage distribution box. The vehicle-end power supply module is used to provide power support to the vehicle-end load, and the external power supply module is used to provide AC and DC power to the external load.

2. A mobile energy storage system according to claim 1, characterized in that: The vehicle-end power supply module includes a power distribution module and a first DC-DC conversion module. The power distribution module and the first DC-DC conversion module are both communicatively connected to the vehicle control module. The input end of the power distribution module is electrically connected to the output end of the high-voltage distribution box, and the output end of the power distribution module is electrically connected to the first DC-DC conversion module.

3. A mobile energy storage system according to claim 2, characterized in that: The vehicle-end load includes a motor controller and a drive motor. The motor controller is communicatively connected to the vehicle control module, and the drive motor is electrically connected to the output end of the power distribution module through the motor controller.

4. A mobile energy storage system according to claim 2, characterized in that: The vehicle-end load also includes an electric compressor and an electric heater, both of which are communicatively connected to the vehicle control module, and both of which are electrically connected to the output end of the power distribution module.

5. A mobile energy storage system according to claim 1, characterized in that: The vehicle-end load also includes a communication module and a display module, and both the communication module and the display module are communicatively connected to the vehicle control module.

6. A mobile energy storage system according to claim 1, characterized in that: The external power supply module includes an energy storage inverter and a second DC-DC conversion module. The energy storage inverter and the second DC-DC conversion module are both communicatively connected to the vehicle control module, and the energy storage inverter and the second DC-DC conversion module are both electrically connected to the high-voltage distribution box.

7. A mobile energy storage system according to claim 6, characterized in that: The external power supply module also includes an AC interface and a DC charging gun. The AC interface is electrically connected to the high-voltage distribution box through the energy storage inverter, and the DC charging gun is electrically connected to the high-voltage distribution box through the second DC-DC conversion module.

8. A mobile energy storage system according to claim 6, characterized in that: The external power supply module also includes a slow charging interface and a fast charging interface. The slow charging interface stores energy for the energy storage module through the energy storage inverter, and the fast charging interface stores energy for the energy storage module through the second DC-DC conversion module.

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