A compact mobile energy storage vehicle parallel energy storage power supply system
Patent Information
- Application Number
- CN202610631306.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-09
- Publication Date
- 2026-09-08
AI Technical Summary
[0003]然而，现有移动储能并机保供技术存在诸多局限，电量监测仅采用原始采集数据，未进行有效值处理，数据可靠性不足；并机运行缺乏标准化的调度与切换逻辑，无法实现储能单元的阶梯式切换与循环管控；多台设备仅能独立供电或直接并机输出，无法实现从储能单元直接为主输出储能单元补能的闭环运行；功率转换仅适配单一运行模式，离网运行的适配性较差；同时多台并机的兼容性不足，难以满足复杂场景下持续、稳定的并机储能保供电需求，导致无法兼顾主输出储能单元、从储能单元监测精准性、调度逻辑性与运行兼容性，难以适配紧凑移动储能车的实际应用需求
一、本发明通过主输出储能单元、从储能单元、能量管理单元、电池管理单元、储能变流器、并网柜组成并机储能保供体系，主输出储能单元固定对外输出，从储能单元轮流接入主输出储能单元；电池管理单元分别采集并计算主、从储能单元的剩余电量有效监测值，能量管理单元依据监测值调度从储能单元接入、并机供电与直接补能，实现从储能单元阶梯式切换与循环管控；储能变流器与并网柜完成电能转换和并机连接调控，整体形成闭环运行架构，适配主从并机保供的实际需求。
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Figure CN122717033A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of energy storage and power supply technology, specifically to a parallel energy storage and power supply system for a compact mobile energy storage vehicle. Background Technology
[0002] With the continuous growth in demand for temporary power supply and emergency power supply scenarios, compact mobile energy storage vehicles have become core equipment in the field of power security. They are widely used in outdoor operations, emergency repairs, load expansion and other scenarios. In practical applications, the power supply capacity of a single energy storage device is limited. Parallel operation of multiple devices for energy storage and supply has become an important way to meet the demand for long-term and high-power power supply. Stable parallel operation and continuous power supply capability directly determine the supply guarantee effect and application adaptability of mobile energy storage vehicles in various scenarios.
[0003] However, existing mobile energy storage parallel operation technologies have many limitations. Power monitoring only uses raw collected data without effective value processing, resulting in insufficient data reliability. Parallel operation lacks standardized scheduling and switching logic, making it impossible to achieve tiered switching and cyclic management of energy storage units. Multiple devices can only supply power independently or directly output in parallel, failing to achieve closed-loop operation where energy is directly replenished from the main output energy storage unit. Power conversion is only compatible with a single operating mode, with poor adaptability to off-grid operation. At the same time, the compatibility of multiple parallel operations is insufficient, making it difficult to meet the continuous and stable power supply requirements of parallel energy storage in complex scenarios. This results in an inability to simultaneously consider the accuracy of monitoring the main output energy storage unit and the slave energy storage unit, the scheduling logic, and operational compatibility, making it difficult to adapt to the actual application needs of compact mobile energy storage vehicles. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a parallel energy storage and supply system for a compact mobile energy storage vehicle. This invention comprises a main output energy storage unit, slave energy storage units, an energy management unit, a battery management unit, an energy storage converter, and a grid-connected cabinet, forming a parallel energy storage and supply system. The main output energy storage unit provides fixed external output, while slave energy storage units alternately connect to the main output energy storage unit. The battery management unit collects and calculates the effective monitoring values of the remaining power of the main and slave energy storage units. The energy management unit schedules the connection, parallel power supply, and direct energy replenishment of slave energy storage units based on the monitoring values, achieving tiered switching and cyclic management of slave energy storage units. The energy storage converter and grid-connected cabinet complete power conversion and parallel connection control, forming a closed-loop operating architecture that adapts to the actual needs of master-slave parallel energy supply.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a parallel energy storage and supply system for a compact mobile energy storage vehicle, the system comprising: a main output energy storage unit, a slave energy storage unit, an energy management unit, a battery management unit, an energy storage converter, and a grid-connected cabinet; The main output energy storage unit provides fixed external power supply, while the secondary energy storage unit is only connected to the main output energy storage unit, which provides unified external power supply. The battery management unit is electrically connected to the main output energy storage unit and the slave energy storage unit. The battery management unit collects the remaining power status data of the main output energy storage unit and the slave energy storage unit, and then calculates the effective value of the remaining power to obtain the effective monitoring value. After establishing a signal connection with the battery management unit, energy storage converter, and grid-connected cabinet, the energy management unit generates and issues operation mode control commands, grid connection and cut-off control commands based on the effective monitoring value of the remaining power. It completes the scheduling operations of connecting the energy storage unit to the main output energy storage unit, master-slave parallel power supply, and energy storage unit supplementing the main output energy storage unit. It also completes the step-by-step switching and cyclic operation management of the energy storage unit connecting to the main output energy storage unit in turn. The energy storage converter and grid-connected cabinet receive the operation mode control commands issued by the energy management unit. The energy storage converter completes the AC / DC conversion operation between the main output energy storage unit and the slave energy storage unit. The grid-connected cabinet works together to complete the electrical connection control between the slave energy storage unit and the main output energy storage unit. The grid-connected cabinet receives grid-connection and disconnection control commands issued by the energy management unit, and completes the operation of connecting or disconnecting the main output energy storage unit from the energy storage unit through the grid-connected cabinet, so as to realize the main-slave parallel power supply and direct energy replenishment from the slave energy storage unit.
[0006] Furthermore, the main output energy storage unit, energy management unit, battery management unit, and energy storage converter are integrated into the main mobile energy storage vehicle, while the slave energy storage unit, energy management unit, battery management unit, and energy storage converter are integrated into the slave mobile energy storage vehicle. The main output energy storage unit is fixed to output externally, while the slave energy storage units support one or more units to be connected to the main output energy storage unit in turn. The main output energy storage unit and the slave energy storage unit have the same specifications and performance parameters, realizing the parallel superposition of energy storage and charging / discharging capabilities. The energy management unit establishes a dual electrical and signal connection relationship with the battery management unit, energy storage converter, and grid-connected cabinet. The energy storage converter has a modular structure and has AC charging / discharging function. It is composed of multiple equal-power converter units, each of which can operate independently or coordinately according to power supply requirements to adjust the actual output power of the main output energy storage unit and the slave energy storage unit.
[0007] Furthermore, each main output energy storage unit and each slave energy storage unit is equipped with a separate battery management unit. After establishing an electrical connection with the corresponding main output energy storage unit and slave energy storage unit, the battery management unit collects the remaining power status of the main output energy storage unit and slave energy storage unit with percentage-level precision. Based on the collected remaining power status data, the effective value is calculated using the remaining power effective monitoring value calculation formula to obtain the effective monitoring value of the remaining power of the main output energy storage unit and slave energy storage unit.
[0008] Furthermore, the battery management unit calculates the effective value using a formula for calculating the effective remaining power monitoring value. The formula for calculating the effective remaining power monitoring value is as follows: ,in, The effective monitoring value of the remaining power of the main output energy storage unit and the slave energy storage unit. This refers to the remaining power status data of the main output energy storage unit and the slave energy storage unit collected by the battery management unit in a single transaction. This is the average value of the remaining power status of the main output energy storage unit and the slave energy storage unit collected by the battery management unit within a set time period prior to this data collection. The weighting coefficients for real-time acquired values are determined by the cell characteristics of the main output energy storage unit and the slave energy storage unit, and the acquisition frequency of the battery management unit.
[0009] Furthermore, the energy management unit completes the initial setup for off-grid operation of the main output energy storage unit and the slave energy storage unit. During initial operation, the main output energy storage unit establishes a three-phase AC voltage for the load in off-grid mode and continuously outputs power. Based on the effective monitoring value of the remaining power, the energy management unit calculates the power supply switching judgment value through the power supply switching judgment formula. According to the power supply switching judgment value, it issues operation mode control commands and grid connection and disconnection control commands to the grid-connected cabinet and energy storage converter. Through the grid connection and disconnection control commands, the slave energy storage unit to be connected is connected to the main output energy storage unit. Then, through the operation mode control commands, the slave energy storage unit to be connected is switched to the parallel collaborative power supply mode, where the slave energy storage unit cooperates with the main output energy storage unit to provide full-load parallel power supply, while directly supplementing the main output energy storage unit. When the energy management unit determines that the main output energy storage unit and the slave energy storage unit have met the power supply requirements, and the current When the effective monitoring value of the remaining power of the energy storage unit reaches or falls below 0.1, the system switches to a fully charged energy storage unit to connect to the main output energy storage unit for continued power supply and replenishment. If the power supply requirement is not met, grid connection and cut-out control commands are issued to connect a new energy storage unit to the main output energy storage unit, and the low-power energy storage unit is withdrawn for replenishment. If the power supply requirement is still not met after all energy storage units are put into operation, the fully charged energy storage unit is moved back and connected, and enters standby mode. The energy management unit calculates the energy replenishment scheduling judgment value of the parallel cycle through the parallel cycle energy replenishment scheduling formula, and issues operation mode control commands and grid connection and cut-out control commands according to the energy replenishment scheduling judgment value. This controls each energy storage unit to operate in a cycle according to the process of taking turns connecting to the main output energy storage unit, parallel full-load power supply, direct replenishment, and full-power standby, thus completing the step-by-step switching and cyclic operation management of the energy storage units taking turns connecting to the main output energy storage unit.
[0010] Furthermore, the energy management unit calculates a power supply switching determination value based on the effective monitoring value of the remaining power capacity using a power supply switching determination formula, which is: ,in, The power supply switching judgment value is when When the conditions for switching from the energy storage unit are met, The effective monitoring value of the remaining power of the main output energy storage unit and the slave energy storage unit. This represents the real-time load power at the site. The rated output power of a single main output energy storage unit or slave energy storage unit. This is the load power correction factor, calibrated by the load fluctuation characteristics.
[0011] Furthermore, the energy management unit calculates the energy replenishment scheduling judgment value for parallel operation cycles using the parallel operation cyclic energy replenishment scheduling formula, which is: ,in, For the energy replenishment scheduling decision value, when When the conditions for initiating the dispatching of energy storage units in turn are determined, This is the effective monitoring value of the remaining power in the standby energy storage unit. The number of standby energy storage units. The rated output power of a single main output energy storage unit or slave energy storage unit. This is the parallel power gap correction factor, determined by the parallel operation characteristics and power gap.
[0012] Furthermore, after receiving the off-grid or grid-connected operation mode control command issued by the energy management unit, the energy storage converter and grid-connected cabinet confirm the target operation mode of the main output energy storage unit and the slave energy storage unit. The energy storage converter performs AC-DC conversion operation according to the operation mode control command, and then completes the electrical on / off control between the slave energy storage unit and the main output energy storage unit through the closing and opening control components in the grid-connected cabinet.
[0013] Furthermore, the grid-connected cabinet receives grid-connection and disconnection control commands issued by the energy management unit to complete the connection or disconnection of the main output energy storage unit from the energy storage unit. During the process of replenishing energy from the main output energy storage unit, the energy storage unit provides real-time feedback on the replenishment progress to the energy management unit. After the replenishment is completed, the energy storage unit sends a replenishment completion signal.
[0014] Compared with existing technologies, this parallel energy storage and supply system for a compact mobile energy storage vehicle has the following advantages: I. This invention comprises a parallel energy storage and supply system consisting of a main output energy storage unit, a slave energy storage unit, an energy management unit, a battery management unit, an energy storage converter, and a grid-connected cabinet. The main output energy storage unit provides fixed external output, while the slave energy storage units alternately connect to the main output energy storage unit. The battery management unit collects and calculates the effective monitoring values of the remaining power of the main and slave energy storage units. The energy management unit schedules the connection of the slave energy storage units, provides parallel power supply, and directly replenishes energy based on the monitoring values, realizing the tiered switching and cyclic management of the slave energy storage units. The energy storage converter and the grid-connected cabinet complete the power conversion and parallel connection control, forming a closed-loop operation architecture that adapts to the actual needs of master-slave parallel supply.
[0015] Second, this invention achieves flexible adaptation between single-unit independent operation and multi-unit parallel operation through the main output energy storage unit and the slave energy storage unit. When multiple units are in parallel, the specifications and performance parameters of the main / slave energy storage units remain consistent, and the parallel superposition of energy storage and charging / discharging capabilities can meet the power supply needs of different scenarios. The modular structure of the energy storage converter can realize the independent or collaborative operation of each converter unit, accurately matching the output power adjustment needs of the main / slave energy storage units. The energy management unit relies on the effective monitoring of the remaining power of the main output energy storage unit and the slave energy storage unit, the determination of power supply switching, and the orderly connection of parallel cyclic energy replenishment scheduling to standardize the entire process logic of power supply, switching, and energy replenishment of the main / slave energy storage units. The slave energy storage unit can directly replenish the main output energy storage unit without the need for external charging equipment, ensuring the continuous and stable operation of the parallel energy storage supply system and improving the compatibility and continuity of parallel operation of multiple main / slave energy storage units.
[0016] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0018] Figure 1 A flowchart of a parallel energy storage and supply system for a compact mobile energy storage vehicle; Figure 2 A flowchart illustrating power monitoring in a parallel energy storage and supply system for a compact mobile energy storage vehicle; Figure 3 This is a framework diagram of the stepped switching and cyclic operation control in a parallel energy storage and supply system for a compact mobile energy storage vehicle. Detailed Implementation
[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0020] Example: In emergency power supply scenarios for large-scale outdoor infrastructure projects, where there is no stable municipal power grid connection and various electrical loads such as mixers, lighting equipment, and testing instruments are distributed on site, it is necessary to rely on compact mobile energy storage vehicles to ensure continuous high-power power supply around the clock. All power supply operations are completed through the parallel energy storage system of the compact mobile energy storage vehicle.
[0021] A parallel energy storage and supply system is formed by a main output energy storage unit, slave energy storage units, energy management units, battery management units, energy storage converters, and grid-connected cabinets. For example... Figure 1 As shown, the main output energy storage unit, energy management unit, battery management unit, and energy storage converter are integrated into the main mobile energy storage vehicle, while the slave energy storage unit, energy management unit, battery management unit, and energy storage converter are integrated into the slave mobile energy storage vehicle. The main output energy storage unit can operate independently or in parallel with multiple slave energy storage units, depending on the power supply requirements of on-site construction. The main output energy storage unit provides a fixed external power supply, while the slave energy storage units can be connected to the main output energy storage unit in turn, one or more at a time. The specifications and performance parameters of the main output energy storage unit and the slave energy storage units are consistent, enabling energy storage and... The parallel superposition of charging and discharging capabilities meets the demand for centralized power supply on site. The energy management unit, battery management unit, energy storage converter, and grid-connected cabinet all establish dual electrical and signal connections to ensure the stability of command and power transmission within the system. The energy storage converter adopts a modular structure and has AC charging and discharging functions. It consists of multiple equal-power converter units. Each converter unit can operate independently or coordinate with the power load changes at different times of on-site construction to adjust the actual output power of the main output energy storage unit and the slave energy storage unit, accurately matching the power demand of various construction equipment on site.
[0022] Each main output energy storage unit and slave energy storage unit is equipped with a separate battery management unit (BMU). The BMU establishes an electrical connection with its corresponding main output energy storage unit and slave energy storage unit. Considering the complex environment and susceptibility to electrical interference at construction sites, the BMU performs percentage-level precision data acquisition of the remaining charge status of the main output energy storage unit and slave energy storage unit. It stably acquires the remaining charge status data of the main output energy storage unit and slave energy storage unit, and then calculates the effective value based on the acquired remaining charge status data using the effective remaining charge monitoring value calculation formula. Figure 2As shown, the effective monitoring values of the remaining power of the main output energy storage unit and the slave energy storage unit are obtained. The formula for calculating the effective monitoring value of the remaining power is: ,in, The effective monitoring value of the remaining power of the main output energy storage unit and the slave energy storage unit. This refers to the remaining power status data of the main output energy storage unit and the slave energy storage unit collected by the battery management unit in a single transaction. This is the average value of the remaining power status of the main output energy storage unit and the slave energy storage unit collected by the battery management unit within a set time period prior to this data collection. The weighting coefficients for the real-time collected values are determined by the cell characteristics of the main output energy storage unit and the slave energy storage unit, and the collection frequency of the battery management unit; this effective monitoring value of the remaining power serves as the core data for subsequent system scheduling.
[0023] The energy management unit (EMU) completes the initial setup for off-grid operation for both the main output energy storage unit and the secondary energy storage unit. During the initial operation phase, the main output energy storage unit establishes a three-phase AC voltage for the on-site construction load in off-grid mode and continuously supplies power to ensure the rapid startup and operation of on-site construction equipment. Based on the effective monitoring value of the remaining power, the EMU calculates the power supply switching judgment value using a power supply switching judgment formula. The power supply switching judgment formula is as follows: ,in, The power supply switching judgment value is when When the conditions for switching from the energy storage unit are met, The effective monitoring value of the remaining power of the main output energy storage unit and the slave energy storage unit. This represents the real-time load power at the site. The rated output power of a single main output energy storage unit or slave energy storage unit. The load power correction coefficient is calibrated based on load fluctuation characteristics. When the calculated power supply switching judgment value meets the power supply switching conditions, the energy management unit issues operation mode control commands and grid connection and disconnection control commands to the grid-connected cabinet and energy storage converter. First, the grid connection and disconnection control commands connect the slave energy storage unit to the main output energy storage unit. Then, the operation mode control commands switch the slave energy storage unit to the parallel collaborative power supply mode. The slave energy storage unit to be connected works in full load to cooperate with the main output energy storage unit for parallel power supply, and simultaneously directly supplements the main output energy storage unit, realizing the synchronous operation of power supply and energy supplementation. The energy management unit determines in real time whether the power supply capacity of the main output energy storage unit and slave energy storage unit already in operation meets the on-site power supply requirements. If the power supply requirements are met, and the slave energy storage unit currently supplying power... When the effective monitoring value of the remaining power of a unit reaches or falls below the set value of 0.1, the system switches to a fully charged slave energy storage unit to continue supplying power and replenishing energy to the main output energy storage unit. The switching process is seamless, ensuring continuous operation of on-site construction equipment. If the power supply requirement is not met, the energy management unit continues to issue grid connection and disconnection control commands, connecting a new slave energy storage unit to the main output energy storage unit for parallel power supply. Simultaneously, the low-power slave energy storage unit is removed and offline replenished, without affecting normal on-site power supply operations. If the on-site power supply requirement still cannot be met after all slave energy storage units are operational, a fully charged slave energy storage unit is moved back to the site and connected, entering standby mode. The energy management unit calculates the parallel cycle replenishment scheduling judgment value using the parallel cycle replenishment scheduling formula, which is: ,in, For the energy replenishment scheduling decision value, when When the conditions for initiating the dispatching of energy storage units in turn are determined, This is the effective monitoring value of the remaining power in the standby energy storage unit. The number of standby energy storage units. The rated output power of a single main output energy storage unit or slave energy storage unit. This is the parallel power gap correction coefficient, determined by the parallel operation characteristics and power gap. When the energy replenishment scheduling judgment value reaches the cyclic scheduling condition, operation mode control commands and grid connection and cut-off control commands are issued based on the energy replenishment scheduling judgment value. This controls each slave energy storage unit to operate cyclically according to the process of taking turns connecting to the main output energy storage unit, parallel full-load power supply, directly replenishing the main output energy storage unit, and full-charge standby. This completes the step-by-step switching and cyclic operation management of slave energy storage units taking turns connecting to the main output energy storage unit. Figure 3 As shown, the system ensures uninterrupted power supply throughout the entire process, meeting the power supply requirements for long-term continuous construction of infrastructure projects.
[0024] After receiving the operation mode control command issued by the energy management unit, the energy storage converter and grid-connected cabinet confirm the target operation mode of the main output energy storage unit and the slave energy storage unit. The energy storage converter performs AC-DC conversion operation according to the operation mode control command, converting the electrical energy output by the main output energy storage unit and the slave energy storage unit into an electrical energy form suitable for various construction electrical equipment on site, meeting the power supply needs of different AC and DC electrical equipment. After the conversion is completed, the closing and opening control components in the grid-connected cabinet complete the electrical on / off control between the slave energy storage unit and the main output energy storage unit, realize the parallel electrical connection control of the main / slave energy storage units, stably adapt to the power supply needs of off-grid operation scenarios, and ensure that the operation mode switching process is smooth and shock-free.
[0025] The grid-connected cabinet receives grid-connection and disconnection control commands from the energy management unit. Following these commands, it completes the connection and disconnection operations from the main output energy storage unit. The connection and disconnection processes are smooth and without fluctuations, ensuring no interference with the on-site power supply. After connecting to the main output energy storage unit, the cabinet directly replenishes the main output energy storage unit. During the replenishment process, the cabinet continuously provides real-time feedback on the replenishment progress to the energy management unit, allowing for real-time monitoring of the replenishment status. Once the replenishment operation is complete, the cabinet sends a replenishment completion signal to the energy management unit and enters a standby state, awaiting dispatch commands. It can reconnect at any time to participate in parallel power supply operations, ensuring the continuous and stable operation of the parallel energy storage power supply system.
[0026] In summary, a parallel energy storage supply system is formed by a main output energy storage unit, slave energy storage units, an energy management unit, a battery management unit, an energy storage converter, and a grid-connected cabinet. The battery management unit accurately collects and calculates the effective value of the remaining power of the main and slave energy storage units, providing reliable data support for dispatching. The energy management unit generates control commands based on monitoring data, realizing a tiered switching and cyclic operation control of master-slave parallel operation and the rotational access of slave energy storage units. The energy storage converter and the grid-connected cabinet work together to complete power conversion and parallel electrical connection control. The grid-connected cabinet completes the entire process of connecting slave energy storage units to and disconnecting from the main output energy storage unit and direct energy replenishment. The main output energy storage unit supports independent operation, and multiple slave energy storage units can be connected in parallel to the main output energy storage unit for operation. It can adapt to various emergency supply scenarios and realize uninterrupted and stable parallel energy storage supply operation.
[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A parallel energy storage and supply system for a compact mobile energy storage vehicle, characterized in that, The system includes: a main output energy storage unit, a slave energy storage unit, an energy management unit, a battery management unit, an energy storage converter, and a grid-connected cabinet; The main output energy storage unit provides fixed external power supply, while the secondary energy storage unit is only connected to the main output energy storage unit, which provides unified external power supply. The battery management unit is electrically connected to the main output energy storage unit and the slave energy storage unit. The battery management unit collects the remaining power status data of the main output energy storage unit and the slave energy storage unit, and then calculates the effective value of the remaining power to obtain the effective monitoring value. After establishing a signal connection with the battery management unit, energy storage converter, and grid-connected cabinet, the energy management unit generates and issues operation mode control commands, grid connection and cut-off control commands based on the effective monitoring value of the remaining power. It completes the scheduling operations of connecting the energy storage unit to the main output energy storage unit, master-slave parallel power supply, and energy storage unit supplementing the main output energy storage unit. It also completes the step-by-step switching and cyclic operation management of the energy storage unit connecting to the main output energy storage unit in turn. The energy storage converter and grid-connected cabinet receive the operation mode control commands issued by the energy management unit. The energy storage converter completes the AC / DC conversion operation between the main output energy storage unit and the slave energy storage unit. The grid-connected cabinet works together to complete the electrical connection control between the slave energy storage unit and the main output energy storage unit. The grid-connected cabinet receives grid-connection and disconnection control commands issued by the energy management unit, and completes the operation of connecting or disconnecting the main output energy storage unit from the energy storage unit through the grid-connected cabinet, so as to realize the main-slave parallel power supply and direct energy replenishment from the slave energy storage unit.
2. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 1, characterized in that, The main output energy storage unit, energy management unit, battery management unit, and energy storage converter are integrated into the main mobile energy storage vehicle, while the slave energy storage unit, energy management unit, battery management unit, and energy storage converter are integrated into the slave mobile energy storage vehicle. The main output energy storage unit has a fixed output, while the slave energy storage units support one or more units to be connected to the main output energy storage unit in turn. The main output energy storage unit and the slave energy storage unit have the same specifications and performance parameters, realizing the parallel superposition of energy storage and charging / discharging capabilities. The energy management unit establishes a dual electrical and signal connection relationship with the battery management unit, energy storage converter, and grid-connected cabinet. The energy storage converter has a modular structure and has AC charging / discharging function. It is composed of multiple equal-power converter units. Each converter unit can operate independently or coordinately according to power supply demand to adjust the actual output power of the main output energy storage unit and the slave energy storage unit.
3. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 1, characterized in that, Each main output energy storage unit and each slave energy storage unit is equipped with a separate battery management unit. After establishing an electrical connection with the corresponding main output energy storage unit and slave energy storage unit, the battery management unit collects the remaining power status of the main output energy storage unit and slave energy storage unit with percentage-level precision. Based on the collected remaining power status data, the effective value is calculated using the formula for calculating the effective monitoring value of remaining power, thus obtaining the effective monitoring value of remaining power of the main output energy storage unit and slave energy storage unit.
4. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 3, characterized in that, The battery management unit calculates the effective value of the remaining power using a formula for calculating the effective monitoring value of the remaining power. The formula for calculating the effective monitoring value of the remaining power is: ,in, The effective monitoring value of the remaining power of the main output energy storage unit and the slave energy storage unit. This refers to the remaining power status data of the main output energy storage unit and the slave energy storage unit collected by the battery management unit in a single transaction. This is the average value of the remaining power status of the main output energy storage unit and the slave energy storage unit collected by the battery management unit within a set time period prior to this data collection. The weighting coefficients for real-time acquired values are determined by the cell characteristics of the main output energy storage unit and the slave energy storage unit, and the acquisition frequency of the battery management unit.
5. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 1, characterized in that, The energy management unit completes the initial setup for off-grid operation of the main output energy storage unit and the slave energy storage unit. During initial operation, the main output energy storage unit establishes a fixed three-phase AC voltage for the load in off-grid mode and continuously outputs power. Based on the effective monitoring value of the remaining power, the energy management unit calculates the power supply switching judgment value using a power supply switching judgment formula. According to the power supply switching judgment value, it issues operation mode control commands and grid connection and disconnection control commands to the grid-connected cabinet and energy storage converter. Through the grid connection and disconnection control commands, the slave energy storage unit to be connected is connected to the main output energy storage unit. Then, through the operation mode control commands, the slave energy storage unit to be connected is switched to a parallel collaborative power supply mode, where the slave energy storage unit cooperates with the main output energy storage unit to provide full-load parallel power supply, while simultaneously directly supplementing the main output energy storage unit. When the energy management unit determines that the main output energy storage unit and slave energy storage unit have met the power supply requirements, and the current power supply... When the effective monitoring value of the remaining power of the energy storage unit reaches or falls below 0.1, the system switches to a fully charged energy storage unit to connect to the main output energy storage unit for continued power supply and replenishment. If the power supply requirement is not met, grid connection and cut-out control commands are issued to connect a new energy storage unit to the main output energy storage unit, and the low-power energy storage unit is withdrawn for replenishment. When the power supply requirement is still not met after all energy storage units are put into operation, the fully charged energy storage unit is moved back and connected, and enters standby mode. The energy management unit calculates the energy replenishment scheduling judgment value of the parallel cycle through the parallel cycle energy replenishment scheduling formula, and issues operation mode control commands and grid connection and cut-out control commands according to the energy replenishment scheduling judgment value. This controls each energy storage unit to operate in a cycle according to the process of taking turns connecting to the main output energy storage unit, parallel full-load power supply, direct replenishment, and full-power standby, thus completing the step-by-step switching and cyclic operation management of the energy storage units taking turns connecting to the main output energy storage unit.
6. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 5, characterized in that, The energy management unit calculates the power supply switching determination value based on the effective monitoring value of the remaining power, using a power supply switching determination formula. The power supply switching determination formula is as follows: ,in, The power supply switching judgment value is when When the conditions for switching from the energy storage unit are met, The effective monitoring value of the remaining power of the main output energy storage unit and the slave energy storage unit. This represents the real-time load power on site. The rated output power of a single main output energy storage unit or slave energy storage unit. This is the load power correction factor, calibrated based on load fluctuation characteristics.
7. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 5, characterized in that, The energy management unit calculates the energy replenishment scheduling judgment value for parallel operation cycles using the parallel operation cycle energy replenishment scheduling formula, which is: ,in, For the energy replenishment scheduling decision value, when When the conditions for initiating the dispatching of energy storage units in turn are determined, This is the effective monitoring value of the remaining power in the standby energy storage unit. The number of standby energy storage units. The rated output power of a single main output energy storage unit or slave energy storage unit. This is the parallel power gap correction factor, determined by the parallel operation characteristics and power gap.
8. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 1, characterized in that, After receiving the off-grid or grid-connected operation mode control command issued by the energy management unit, the energy storage converter and grid-connected cabinet confirm the target operation mode of the main output energy storage unit and the slave energy storage unit. The energy storage converter performs AC-DC conversion operation according to the operation mode control command, and then completes the electrical on / off control between the slave energy storage unit and the main output energy storage unit through the closing and opening control components in the grid-connected cabinet.
9. The parallel energy storage and supply system for a compact mobile energy storage vehicle according to claim 1, characterized in that, The grid-connected cabinet receives grid connection and disconnection control commands issued by the energy management unit to complete the connection or disconnection of the main output energy storage unit from the energy storage unit. During the process of replenishing energy from the main output energy storage unit, the energy storage unit provides real-time feedback on the replenishment progress to the energy management unit. After the replenishment is completed, the energy storage unit sends a replenishment completion signal.