Modular light storage and flexible integrated energy cabinet and use method

Abstract

The application discloses a modular light storage direct flexible integrated energy cabinet, which comprises a light storage direct flexible integrated energy cabinet body, an operation control assembly is arranged on the front face of the light storage direct flexible integrated energy cabinet body, and a power control assembly is arranged in the light storage direct flexible integrated energy cabinet body. When the application is used subsequently, the emergency power-off button and the customer screen of the operation control assembly can be used to quickly cut off the power supply and check the running parameters in real time when an abnormal situation occurs, thereby improving the operation safety and the man-machine interaction convenience of the energy cabinet. The high-voltage control box and the power conversion module of the power control assembly are used to realize accurate regulation and control and efficient conversion of electric energy. The heat dissipation grille of the power conversion module cooperates with the dustproof filter screen to guarantee the heat dissipation efficiency and the dustproof effect during long-time operation, so that the performance of the power conversion module is prevented from being reduced due to dust accumulation or excessively high temperature, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of energy cabinet technology, specifically relating to a modular photovoltaic-storage-direct-flexible integrated energy cabinet and its usage method. Background Technology

[0002] The integrated photovoltaic-storage-DC-flexible energy cabinet combines photovoltaic power generation, energy storage batteries, DC power distribution, and flexible power consumption functions. It is widely used in distributed energy systems in industrial parks, buildings, and residences, and is an important component of green and low-carbon energy.

[0003] Existing integrated photovoltaic-storage-direct-drive flexible energy cabinets suffer from unreasonable control component layouts, lack a one-button emergency power-off device, and cannot quickly cut off power in case of current overload or battery malfunction, posing significant safety hazards. Power management components generate substantial heat under high loads, and traditional heat dissipation vents are prone to dust accumulation, affecting heat dissipation efficiency and lifespan. Wired communication is prevalent, resulting in complex wiring, high maintenance costs, and difficulty in achieving remote wireless monitoring, leading to low levels of intelligence. Inadequate heat dissipation in the lithium iron phosphate battery box can cause overheating, affecting cycle life and even triggering thermal runaway accidents; furthermore, the lack of effective pressure relief protection devices poses an explosion risk. These problems result in the energy cabinet's operational safety, reliability, and ease of use failing to meet practical needs, and a complete user guide is lacking to ensure proper operation in different scenarios. Therefore, this invention proposes a modular integrated photovoltaic-storage-direct-drive flexible energy cabinet and its usage method. Summary of the Invention

[0004] The purpose of this invention is to provide a modular photovoltaic-storage-direct-flexible integrated energy cabinet to solve the problems mentioned in the background art.

[0005] In a first aspect, the present invention provides a modular photovoltaic-storage-direct-flexible integrated energy cabinet, comprising:

[0006] The integrated photovoltaic-storage-direct-flexible energy cabinet has an operation control component on the front, a power management component inside, a communication transmission component on the side, a safety pressure relief component on the top, and a battery heat dissipation component at the rear. The operation control components include an emergency power-off button, a customer screen, a cabinet door handle, and an indicator light group. The emergency power-off button is fixedly installed on the upper right corner of the front of the integrated photovoltaic-storage-direct-flexible energy cabinet. The customer screen is located below the emergency power-off button. The cabinet door handle is located on the left edge of the front of the integrated photovoltaic-storage-direct-flexible energy cabinet. The indicator light group is located between the emergency power-off button and the customer screen.

[0007] In one possible implementation of the first aspect, the power management component includes a high-voltage control box and a power conversion module. The high-voltage control box is fixedly installed in the upper part of the interior of the photovoltaic-storage-direct-flexible integrated energy cabinet. The power conversion module is located below the high-voltage control box. A heat dissipation grille for the power conversion module is provided on the lower front of the photovoltaic-storage-direct-flexible integrated energy cabinet, and the heat dissipation grille corresponds to the installation position of the power conversion module.

[0008] In one possible implementation of the first aspect, the heat dissipation grille of the power conversion module is a long strip-shaped louver structure, and a dust filter is fixedly installed on the inner side of the heat dissipation grille of the power conversion module.

[0009] In one possible implementation of the first aspect, the communication transmission component is an antenna port, which is fixedly installed on the upper side of the integrated photovoltaic-storage-direct-flexible energy cabinet, and the antenna port is electrically connected to the energy management system inside the cabinet.

[0010] In one possible implementation of the first aspect, the safety relief component is an explosion-proof valve, which is fixedly installed at the top center of the integrated photovoltaic-storage-direct-flexible energy cabinet, and is connected to the lithium iron phosphate battery box inside the cabinet.

[0011] In one possible implementation of the first aspect, the battery heat dissipation component is a battery heat dissipation grille, which is symmetrically located in the lower rear area of ​​the integrated photovoltaic-storage direct-drive flexible energy cabinet, and the battery heat dissipation grille corresponds to the installation position of the lithium iron phosphate battery box inside the cabinet.

[0012] Compared with existing technologies, the present invention provides a modular photovoltaic-storage-direct-flexible integrated energy cabinet, which has the following beneficial effects: I. In subsequent use, the emergency power-off button and customer screen of the operation control component allow for rapid power cut-off and real-time viewing of operating parameters in case of abnormal situations, improving the operational safety and human-machine interaction convenience of the energy cabinet. Through the high-voltage control box and power conversion module of the power management component, precise control and efficient conversion of electrical energy are achieved. The heat dissipation grille of the power conversion module, combined with the dust filter, ensures heat dissipation efficiency and dust prevention during long-term operation, avoiding performance degradation of the power conversion module due to dust accumulation or excessive temperature, and extending the service life of the equipment. Second, the communication transmission component's antenna port is electrically connected to the energy management system inside the cabinet, enabling remote monitoring and wireless data transmission of the energy cabinet. This improves the intelligent management level of the energy cabinet, allowing operators to monitor its operation without on-site inspections. The explosion-proof valve of the safety pressure relief component automatically opens to release pressure when the internal lithium iron phosphate battery box experiences abnormal high pressure, preventing explosions caused by excessive pressure. Combined with symmetrically arranged battery cooling grilles on the battery cooling component, the battery box is efficiently cooled, preventing overheating from affecting battery life and safety. This comprehensively enhances the operational reliability and safety protection capabilities of the modular photovoltaic-storage-flexible integrated energy cabinet.

[0013] Secondly, the present invention provides a method for using a modular photovoltaic-storage-direct-flexible integrated energy cabinet, including: Obtain the photovoltaic module information of the photovoltaic-storage-direct-flexible integrated energy cabinet, extract the power generation parameters corresponding to each photovoltaic module, analyze the power generation characteristics of the photovoltaic module based on the power generation parameters, and analyze the power generation efficiency of the photovoltaic-storage-direct-flexible integrated energy cabinet based on the power generation characteristics. The photovoltaic-storage-direct-flexible integrated energy cabinet is subjected to charge and discharge tests, and the charging capacity and discharging capacity of the photovoltaic-storage-direct-flexible integrated energy cabinet are tested. Based on the charging capacity and the discharging capacity, the energy storage unit of the photovoltaic-storage-direct-flexible integrated energy cabinet is constructed. Extract the load information of the photovoltaic-storage-direct-flexible integrated energy cabinet, and calculate the energy output force corresponding to each storage unit in the energy storage unit based on the load information; Calculate the energy output signal corresponding to the energy output force, and calculate the output power value corresponding to the energy output signal. Based on the power generation efficiency and the output power value, analyze the energy supply performance of the integrated photovoltaic-storage-direct-flexible energy cabinet. Combining the power generation efficiency and the energy supply performance, determine the usage method of the integrated photovoltaic-storage-direct-flexible energy cabinet.

[0014] In one possible implementation of the second aspect, analyzing the power generation efficiency of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet based on the power generation characteristics includes: Based on the power generation characteristics, determine the efficiency test items for each component in the photovoltaic module; Based on the efficiency test items and the power generation characteristics, set the test conditions for the photovoltaic module; According to the test conditions, the power generation efficiency test of the photovoltaic module is performed to obtain the module efficiency value; The efficiency values ​​of the components are weighted and combined to obtain the total efficiency value; Based on the preset numerical-level table and the total efficiency value, the power generation efficiency corresponding to the integrated photovoltaic-storage-direct-flexible energy cabinet is obtained.

[0015] In one possible implementation of the second aspect, the energy storage unit for constructing the integrated photovoltaic-storage-direct-drive-flexible energy cabinet based on the charging capacity and the discharging capacity includes: Calculate the net storage capacity of the integrated photovoltaic-storage-direct-flexible energy cabinet based on the charging capacity and the discharging capacity. Measure the energy storage cavity volume of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet; The energy storage density of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet is calculated using the net stored energy capacity and the energy storage cavity volume. The energy storage cavity is divided into grids to obtain several micro-energy storage cells; Determine the zoned energy storage capacity corresponding to each of the aforementioned micro-area energy storage cells; The energy storage unit of the photovoltaic-storage-direct-flexible integrated energy cabinet is constructed by combining the partitioned energy storage capacity, the micro-area energy storage body, and the energy storage density.

[0016] In one possible implementation of the second aspect, calculating the energy output force corresponding to each storage unit in the energy storage unit based on the load information includes: Collect real-time power data of each electrical device, and use the load information to establish a mapping relationship between the load and discharge power of the energy storage unit, and determine the average discharge power of the energy storage unit under the current load demand; The energy conversion efficiency of the energy storage unit during the discharge process is calculated based on the mapping relationship, and the effective output energy of each group of energy storage units in the energy storage unit is obtained. Based on the effective output energy and the terminal voltage characteristics of the energy storage unit, the energy supply coefficient of the energy storage unit is calculated. Based on the load information, the energy supply coefficient, and the discharge duration of the energy storage unit, the energy output force corresponding to each group of energy storage units is calculated.

[0017] This invention extracts power generation data from each photovoltaic module to understand its operation, analyzes its power generation characteristics, and obtains its unique performance, thereby improving the accuracy of power generation efficiency analysis. Secondly, by conducting charge and discharge tests on the integrated photovoltaic-storage-direct-drive flexible energy cabinet and measuring its charging and discharging capacities, this invention obtains the standard charging and discharging capacities, providing a basis for subsequent energy allocation capability analysis. Furthermore, by calculating the energy output force of each storage unit based on the load information, this invention obtains the energy supply capacity of the energy cabinet under different load conditions, providing a quantitative basis for subsequent energy allocation optimization. Finally, by calculating the energy output signal corresponding to the energy output force and the output power value corresponding to the energy output signal, this invention obtains the energy output force signal value and power value, facilitating the analysis of the energy supply performance of the integrated photovoltaic-storage-direct-drive flexible energy cabinet based on the power value. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a modular photovoltaic-storage integrated direct-drive and flexible energy cabinet structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a customer screen structure proposed in an embodiment of the present invention; Figure 4 This is a schematic cross-sectional view of an antenna port structure proposed in an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of an explosion-proof valve structure according to an embodiment of the present invention; Figure 6 A method of using a modular photovoltaic-storage-flexible integrated energy cabinet is proposed as an embodiment of the invention; In the diagram: 1. Integrated photovoltaic-storage-direct-flexible energy cabinet; 2. Emergency power-off button; 3. Customer screen; 4. Cabinet door handle; 5. High-voltage control box; 6. Indicator light group; 7. Power conversion module heat dissipation grille; 8. Antenna port; 9. Explosion-proof valve; 10. Battery heat dissipation grille. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-5 The system includes a photovoltaic-storage-direct-drive flexible integrated energy cabinet 1. The front of the cabinet 1 is equipped with an operation control component for controlling the integrated energy cabinet. The cabinet 1 also contains an internal power management component for managing the internal power supply. A communication transmission component is located on the side of the cabinet 1 for data transmission with external devices. A safety pressure relief component is located on the top of the cabinet 1 to release pressure in case of abnormal internal pressure, ensuring equipment safety. A battery cooling component is located at the rear of the cabinet 1 to dissipate heat from the lithium iron phosphate battery, improving battery lifespan. The control components include an emergency power-off button 2, a customer screen 3, a cabinet door handle 4, and an indicator light group 6. The emergency power-off button 2 is fixedly installed on the upper right corner of the front of the integrated photovoltaic-storage-direct-flexible energy cabinet 1. When an abnormal situation occurs in the integrated photovoltaic-storage-direct-flexible energy cabinet, the power supply can be quickly cut off by the emergency power-off button 2 to ensure the safety of equipment and personnel. The customer screen 3 is located below the emergency power-off button 2, making it convenient for operators to view the operating status and set parameters of the integrated photovoltaic-storage-direct-flexible energy cabinet. The cabinet door handle 4 is located on the left edge of the front of the integrated photovoltaic-storage-direct-flexible energy cabinet 1, making it convenient to open and close the integrated photovoltaic-storage-direct-flexible energy cabinet 1. The indicator light group 6 is located between the emergency power-off button 2 and the customer screen 3, and the operating status of the integrated photovoltaic-storage-direct-flexible energy cabinet can be judged by the display status of the indicator light group 6.

[0021] The power management component includes a high-voltage control box 5 and a power conversion module. The high-voltage control box 5 is fixedly installed in the upper part of the interior of the photovoltaic-storage-direct-flexible integrated energy cabinet 1, which facilitates the control and management of high-voltage electricity. The power conversion module is located below the high-voltage control box 5 and is used to convert and regulate electrical energy. A heat dissipation grille 7 for the power conversion module is provided on the lower front of the photovoltaic-storage-direct-flexible integrated energy cabinet 1. The heat dissipation grille 7 corresponds to the installation position of the power conversion module, which facilitates the dissipation of heat when the power conversion module is working.

[0022] The heat dissipation grille 7 of the power conversion module is a long strip louver structure. The louver structure can effectively prevent external debris from entering the interior of the photovoltaic-storage-direct-flexible integrated energy cabinet 1, while ensuring air circulation for heat dissipation. A dust filter is fixedly installed on the inner side of the heat dissipation grille 7 of the power conversion module, which can filter the air entering the interior of the photovoltaic-storage-direct-flexible integrated energy cabinet 1 to avoid dust accumulation affecting the normal operation of the power conversion module.

[0023] The communication transmission component is an antenna port 8, which is fixedly installed on the upper side of the photovoltaic-storage-direct-flexible integrated energy cabinet 1 to facilitate the access of the signal antenna device. The antenna port 8 is electrically connected to the energy management system inside the cabinet, and can remotely monitor and transmit data to the photovoltaic-storage-direct-flexible integrated energy cabinet through wireless communication, thereby improving the intelligent management level of the photovoltaic-storage-direct-flexible integrated energy cabinet.

[0024] The safety pressure relief component is an explosion-proof valve 9, which is fixedly installed at the top center of the integrated photovoltaic-storage-direct-flexible energy cabinet 1. When an abnormality occurs in the lithium iron phosphate battery box inside the integrated photovoltaic-storage-direct-flexible energy cabinet, causing the internal pressure to rise, the explosion-proof valve 9 can automatically open to relieve pressure, preventing explosion accidents caused by excessive pressure and improving the safety performance of the integrated photovoltaic-storage-direct-flexible energy cabinet. The explosion-proof valve 9 is connected to the lithium iron phosphate battery box inside the cabinet to ensure the unobstructed pressure relief channel.

[0025] The battery heat dissipation component is a battery heat dissipation grille 10. The battery heat dissipation grille 10 is symmetrically opened in the lower part of the rear of the photovoltaic-storage-direct-flexible integrated energy cabinet 1, which facilitates the dissipation of heat generated by the lithium iron phosphate battery box during operation. The battery heat dissipation grille 10 corresponds to the installation position of the lithium iron phosphate battery box inside the cabinet, which can effectively improve heat dissipation efficiency and prevent the battery from affecting its service life and safety due to excessive temperature.

[0026] The working principle and usage process of a modular photovoltaic-storage-direct-flexible integrated energy cabinet of the present invention are as follows: In subsequent use, first open the cabinet body 1 of the photovoltaic-storage-direct-flexible integrated energy cabinet through the cabinet door handle 4, check the connection status of each internal component, and confirm that the high-voltage control box 5, power conversion module and lithium iron phosphate battery box are installed normally. Then close the cabinet door and lock it through the cabinet door handle 4. Then start the photovoltaic-storage-direct-flexible integrated energy cabinet system, set the working parameters of the photovoltaic-storage-direct-flexible integrated energy cabinet through the customer screen 3. After the system starts, the indicator light group 6 displays the operating status of the photovoltaic-storage-direct-flexible integrated energy cabinet. The operator can judge whether the system is operating normally according to the display of the indicator light group 6.

[0027] When the photovoltaic-storage-direct-current-flexible integrated energy cabinet is operating normally, the direct current generated by the rooftop photovoltaic modules is transmitted to the cabinet body 1 through cables. The power conversion module converts the direct current into electrical energy suitable for the load. The generated heat is dissipated through the heat dissipation grille 7 of the power conversion module. The dust filter can effectively prevent dust from entering the cabinet body and maintain a clean heat dissipation environment for the power conversion module. If the power conversion module generates a lot of heat, the cooling fan can be automatically triggered to enhance heat dissipation and ensure the normal operating temperature of the power conversion module.

[0028] Under sufficient sunlight, the electricity generated by the photovoltaic modules is prioritized for use by the load. If there is any surplus electricity, it is stored in the lithium iron phosphate battery box. The heat generated by the lithium iron phosphate battery box during operation is dissipated through the battery heat dissipation grille 10. The battery heat dissipation grille 10 is symmetrically arranged at the rear of the photovoltaic-storage-direct-flexible integrated energy cabinet 1, which can effectively improve heat dissipation efficiency and prevent the battery from being affected by excessive temperature, thus affecting its service life and safety.

[0029] When an abnormality occurs in the lithium iron phosphate battery box inside the photovoltaic-storage-direct-flexible integrated energy cabinet, causing an increase in internal pressure, the explosion-proof valve 9 can automatically open to release pressure, preventing an explosion due to excessive pressure and improving the safety performance of the integrated photovoltaic-storage-direct-flexible energy cabinet. The antenna port 8 is electrically connected to the energy management system inside the cabinet, enabling remote monitoring and data transmission of the integrated photovoltaic-storage-direct-flexible energy cabinet via wireless communication. Operators can view the operating status and various parameters of the integrated photovoltaic-storage-direct-flexible energy cabinet in real time at the remote monitoring center, improving the intelligent management level of the integrated photovoltaic-storage-direct-flexible energy cabinet.

[0030] When an abnormal situation occurs in the photovoltaic-storage-direct-flexible integrated energy cabinet, the power supply can be quickly cut off through the emergency power-off button 2 to ensure the safety of equipment and personnel. The customer screen 3 can display the operating data of the photovoltaic-storage-direct-flexible integrated energy cabinet in real time, which makes it convenient for operators to monitor the equipment and adjust parameters, thus improving the ease of use and safety of the photovoltaic-storage-direct-flexible integrated energy cabinet.

[0031] See Figure 6 The image shows a method for using a modular photovoltaic-storage-direct-flexible integrated energy cabinet according to an embodiment of the present invention, comprising: S1. Obtain the photovoltaic module information of the photovoltaic-storage-direct-flexible integrated energy cabinet, extract the power generation parameters corresponding to each photovoltaic module, analyze the power generation characteristics of the photovoltaic module based on the power generation parameters, and analyze the power generation efficiency of the photovoltaic-storage-direct-flexible integrated energy cabinet based on the power generation characteristics.

[0032] This invention extracts power generation data from each component of a photovoltaic (PV) module to understand its operational status, analyze its power generation characteristics, and obtain its unique performance, thereby improving the accuracy of power generation efficiency analysis. The PV module information refers to the basic unit information of the solar power generation section in the integrated photovoltaic-storage-direct-drive flexible energy cabinet, such as monocrystalline silicon modules or polycrystalline silicon modules. The power generation data includes the power generation value and light response value of each component. The power generation characteristics are the power generation features of each component, such as photoelectric conversion level and output stability. Furthermore, the power generation data for each component can be collected using a data collection tool written in a scripting language. This tool analyzes the data attributes corresponding to the power generation data, calculates the attribute importance, and identifies key attributes based on the importance values. The power generation characteristics of the PV module are then analyzed based on these key attributes.

[0033] This invention analyzes the power generation efficiency of the photovoltaic-storage-direct-flexible integrated energy cabinet based on the power generation characteristics, thereby obtaining detailed information on the power generation capacity of the photovoltaic modules used in the energy cabinet. The power generation efficiency is the conversion ratio of light energy to electrical energy by the photovoltaic modules.

[0034] As an embodiment of the present invention, the step of analyzing the power generation efficiency of the photovoltaic-storage-direct-flexible integrated energy cabinet based on the power generation characteristics includes: determining the efficiency test items for each component in the photovoltaic module based on the power generation characteristics; setting the test conditions for the photovoltaic module based on the efficiency test items and the power generation characteristics; performing the power generation efficiency test of the photovoltaic module based on the test conditions to obtain the module efficiency value; weighting and combining the module efficiency values ​​to obtain the total efficiency value; and obtaining the power generation efficiency corresponding to the photovoltaic-storage-direct-flexible integrated energy cabinet based on a preset value-level table and the total efficiency value.

[0035] The efficiency test items are the efficiency analysis content of each component in the photovoltaic module. The test conditions are the external factors such as light intensity and temperature corresponding to the efficiency test of the photovoltaic module. The component efficiency value indicates the efficiency level of the photovoltaic module. The total efficiency value is the sum of the efficiency values ​​of all components of the photovoltaic module according to their respective weights. The preset value-level table is a table corresponding to the range of efficiency values ​​and the corresponding efficiency levels.

[0036] Furthermore, the efficiency test items for each component in the photovoltaic module can be obtained based on the characteristic description of the power generation characteristics. The test environment type of the photovoltaic module can be determined based on the efficiency test items, and the environmental conditions of the test environment type can be set according to the power generation characteristics. The test conditions of the photovoltaic module can be set accordingly. The component efficiency value can be obtained from the test results of the photovoltaic module efficiency test. The weighted summation of the component efficiency values ​​can be achieved by the weighted summation method.

[0037] S2. Perform charge and discharge tests on the integrated photovoltaic-storage-direct-flexible energy cabinet, and test the charging capacity and discharging capacity of the integrated photovoltaic-storage-direct-flexible energy cabinet. Based on the charging capacity and the discharging capacity, construct the energy storage unit of the integrated photovoltaic-storage-direct-flexible energy cabinet.

[0038] This invention, by conducting charge and discharge tests on the integrated photovoltaic-storage-direct-flexible energy cabinet and measuring its charging and discharging capacity, yields the standard charging and discharging capacity of the integrated photovoltaic-storage-direct-flexible energy cabinet. This provides a basis for subsequent energy allocation capability analysis. The charging capacity is the actual amount of electricity absorbed and retained by the integrated photovoltaic-storage-direct-flexible energy cabinet at the end of the charging process, and the discharging capacity is the actual amount of electricity output by the integrated photovoltaic-storage-direct-flexible energy cabinet at the end of the discharging process. Furthermore, the charging and discharging capacity can be obtained through a power metering device.

[0039] This invention constructs an energy storage unit for the integrated photovoltaic-storage-direct-drive-flexible energy cabinet based on the charging and discharging power, thereby understanding the energy storage distribution inside the integrated photovoltaic-storage-direct-drive-flexible energy cabinet. The energy storage unit is an expression structure describing the power accumulation method and local energy storage characteristics within the integrated photovoltaic-storage-direct-drive-flexible energy cabinet.

[0040] As an embodiment of the present invention, the step of constructing the energy storage unit of the integrated photovoltaic-storage-direct-flexible energy cabinet based on the charging capacity and the discharging capacity includes: calculating the net storage capacity of the integrated photovoltaic-storage-direct-flexible energy cabinet based on the charging capacity and the discharging capacity; measuring the energy storage cavity volume of the integrated photovoltaic-storage-direct-flexible energy cabinet; calculating the energy storage density of the integrated photovoltaic-storage-direct-flexible energy cabinet using the net storage capacity and the energy storage cavity volume; dividing the energy storage cavity into grids to obtain several micro-area energy storage bodies; determining the partitioned storage capacity corresponding to each micro-area energy storage body; and constructing the energy storage unit of the integrated photovoltaic-storage-direct-flexible energy cabinet by combining the partitioned storage capacity, the micro-area energy storage body, and the energy storage density.

[0041] Wherein, the net stored power is the actual amount of power stored inside the energy cabinet after charging is completed, the energy storage cavity volume is the volume occupied by the space where energy storage materials are arranged inside the energy cabinet, the energy storage density represents the amount of power stored per unit volume, the micro-zone energy storage body is a local energy storage block formed after dividing the energy storage space, and the partitioned energy storage capacity is the amount of power carried by each micro-zone energy storage body itself.

[0042] Optionally, the net stored energy is calculated as follows: net stored energy = charging energy - discharging energy. The energy storage density can be obtained by the ratio of the net stored energy to the volume of the energy storage cavity. The energy storage cavity can be divided into grids using an equal volume partitioning method. The partitioned energy storage capacity can be obtained by local energy sensing and interpolation calculation. The energy storage unit can be established using a partitioned block energy accumulation construction technique.

[0043] S3. Extract the load information of the photovoltaic-storage-direct-flexible integrated energy cabinet, configure the load usage environment of the photovoltaic-storage-direct-flexible integrated energy cabinet according to the load information, and calculate the energy output force corresponding to each storage unit in the energy storage unit under the load usage environment.

[0044] This invention calculates the energy output force corresponding to each storage unit in the energy storage unit based on the load information, thereby obtaining the energy supply capacity of the energy cabinet under different load conditions, providing a quantitative basis for subsequent energy allocation optimization.

[0045] The load information refers to the power demand information of all electrical devices connected to the integrated photovoltaic-storage-direct-flexible energy cabinet, including basic information such as device name, rated power, operating voltage, and starting current; the energy output force is the energy value that each energy storage unit can output when supplying energy to electrical devices; furthermore, the load information can be obtained by measuring the actual power consumption of each device using a power tester.

[0046] As an embodiment of the present invention, the step of calculating the energy output force corresponding to each storage unit in the energy storage unit based on the load information includes: Collect real-time power data of each electrical device, and use the load information to establish a mapping relationship between the load and discharge power of the energy storage unit, and determine the average discharge power of the energy storage unit under the current load demand; The energy conversion efficiency of the energy storage unit during the discharge process is calculated based on the mapping relationship, and the effective output energy of each group of energy storage units in the energy storage unit is obtained. Based on the effective output energy and the terminal voltage characteristics of the energy storage unit, the energy supply coefficient of the energy storage unit is calculated. Based on the load information, the energy supply coefficient, and the discharge duration of the energy storage unit, the energy output force corresponding to each group of energy storage units is calculated.

[0047] The real-time power data refers to the electrical energy consumed by each electrical device per unit time under normal operating conditions; the mapping relationship is a data correspondence table established based on the power characteristics of each electrical device, used to characterize the numerical relationship between the load and the discharge power of the energy storage unit; the average discharge power is the average electrical energy released by the energy storage unit per unit time throughout the entire discharge cycle; the energy conversion efficiency is the ratio of the actual output energy to the theoretical output energy during the process of converting chemical energy into electrical energy by the energy storage unit; the effective output energy is the actual energy that each group of energy storage units can supply to the load after considering internal resistance losses; the terminal voltage characteristic is the voltage change law of the energy storage unit at different discharge depths; the energy supply coefficient is a dimensionless proportional value used to characterize the energy supply capability of the energy storage unit to the load; and the discharge duration is the complete time cycle experienced by the energy storage unit from a fully charged state to the set termination voltage.

[0048] Furthermore, power curve data of each electrical device is collected using smart meters, and the mapping relationship is established through data processing; the real-time internal resistance value is obtained using the online internal resistance monitoring function of the energy storage unit management system, and the energy conversion efficiency is calculated in combination with the terminal voltage and discharge current; the terminal voltage change of the energy storage unit is monitored by a high-precision voltage sensor, the current discharge depth is determined according to the terminal voltage characteristic curve, and the effective output energy is calculated; the effective output energy is divided by the discharge duration to obtain the average output power, which is then corrected in combination with the energy supply coefficient to obtain the energy output force corresponding to each group of energy storage units; the final energy output force calculation process is as follows: first, the mapping relationship is established to obtain the average discharge power, then the average discharge power is corrected according to the energy conversion efficiency to obtain the effective output energy, and finally the energy output force corresponding to each group of energy storage units is calculated in combination with the discharge duration.

[0049] S4. Calculate the energy output signal corresponding to the energy output force, and calculate the output power value corresponding to the energy output signal. Based on the power generation efficiency and the output power value, analyze the energy supply performance of the integrated photovoltaic-storage-direct-flexible energy cabinet. Combine the power generation efficiency and the energy supply performance to determine the usage method of the integrated photovoltaic-storage-direct-flexible energy cabinet.

[0050] This invention calculates the energy output signal corresponding to the energy output force and the output power value corresponding to the energy output signal to obtain the energy output force signal value and power value. This facilitates the analysis of the energy supply performance of the integrated photovoltaic-storage direct-drive flexible energy cabinet based on the power value. The energy output signal is the electrical signal corresponding to the energy output force, and the output power value is the power amplitude corresponding to the energy output signal. Furthermore, the current waveform of the energy output signal and the voltage waveform at both ends of the output port of the energy cabinet are collected. The current value and voltage value at the same moment are multiplied to obtain the instantaneous power value. Taking the AC output cycle of the energy cabinet as a time window, the arithmetic mean of all instantaneous power values ​​within the window is performed to eliminate transient fluctuations and obtain the average power. The average power is used as the output power value corresponding to the energy output signal.

[0051] As an embodiment of the present invention, calculating the energy output signal corresponding to the energy output force includes: Obtain the current conversion coefficient of the energy storage unit at the current operating temperature, and measure the equivalent load resistance of the energy storage unit; Calculate the sum of the internal impedance of the energy storage unit and the line impedance; Combining the current conversion coefficient, the equivalent load resistance, and the sum of the impedances, the energy output signal corresponding to the energy output force is calculated using the following formula:

[0052] in, This represents the energy output signal corresponding to the energy output force. This represents the current conversion factor of the energy storage unit. Indicates energy output force. This represents the equivalent load resistance at the output of the energy cabinet. This represents the sum of the internal impedance of the energy storage unit and the line impedance.

[0053] The current conversion coefficient is determined by the material properties of the energy storage unit and the current operating temperature, and is obtained by looking up a temperature-coefficient correspondence table calibrated in the experiment; the equivalent load resistance is the equivalent DC resistance value of the load connected to the output port of the energy cabinet, which is calculated by applying a small voltage and measuring the current using the volt-ampere method; the impedance sum value is the sum of the internal ohmic resistance of the energy storage unit and the resistance of the external connection line, which is obtained by direct measurement using a micro-ohmmeter.

[0054] This invention analyzes the energy supply performance of the modular photovoltaic-storage-direct-current flexible integrated energy cabinet based on the power generation efficiency and the output power value. This allows for the determination of the power supply reliability of the energy cabinet under different load conditions. Combining the power generation efficiency and the energy supply performance, the invention determines the usage method of the modular photovoltaic-storage-direct-current flexible integrated energy cabinet, thereby clarifying the switching operation process between grid-connected and off-grid modes. The energy supply performance refers to the output stability and responsiveness of the energy cabinet when meeting the load's power demand. The usage method describes the operational specifications for the entire process of starting, running, and shutting down the energy cabinet. Optionally, the energy supply performance of the modular photovoltaic-storage-direct-current flexible integrated energy cabinet can be obtained by calculating the percentage of the product of the output power value and the power generation efficiency to the rated design capacity. Based on the power generation efficiency and energy supply performance, the usage method of the modular photovoltaic-storage direct-drive-flexible integrated energy cabinet is determined. For example, when the power generation efficiency is greater than 80% and the output power value reaches more than 70% of the rated capacity, the energy cabinet is determined to be in a high-energy supply state. At this time, the usage method is to prioritize the photovoltaic direct supply mode and perform balanced charging on each energy storage unit. When the power generation efficiency is less than 50% or the output power value drops by more than 25% for three consecutive sampling cycles, the energy cabinet is determined to be in a low-energy supply state. The usage method is to switch to priority discharge of energy storage units and disconnect unnecessary load branches. If the product of the power generation efficiency and the output power value is between 40% and 60% of the rated capacity, the usage method adopts a photovoltaic and energy storage joint power supply mode, and the output is distributed proportionally to maintain the stability of the bus voltage.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular photovoltaic-storage-direct-flexible integrated energy cabinet, comprising a photovoltaic-storage-direct-flexible integrated energy cabinet body (1), characterized in that: The front of the photovoltaic-storage-direct-flexible integrated energy cabinet (1) is provided with an operation control component, the inside of the photovoltaic-storage-direct-flexible integrated energy cabinet (1) is provided with a power management component, the side of the photovoltaic-storage-direct-flexible integrated energy cabinet (1) is provided with a communication transmission component, the top of the photovoltaic-storage-direct-flexible integrated energy cabinet (1) is provided with a safety pressure relief component, and the rear of the photovoltaic-storage-direct-flexible integrated energy cabinet (1) is provided with a battery heat dissipation component. The operation control components include an emergency power-off button (2), a customer screen (3), a cabinet door handle (4), and an indicator light group (6). The emergency power-off button (2) is fixedly installed on the upper right corner of the front of the photovoltaic-storage-direct-flexible integrated energy cabinet (1). The customer screen (3) is located below the emergency power-off button (2). The cabinet door handle (4) is located on the left edge of the front of the photovoltaic-storage-direct-flexible integrated energy cabinet (1). The indicator light group (6) is located between the emergency power-off button (2) and the customer screen (3).

2. The modular photovoltaic-storage-direct-flexible integrated energy cabinet as described in claim 1, characterized in that, The power management component includes a high-voltage control box (5) and a power conversion module. The high-voltage control box (5) is fixedly installed in the upper part of the cabinet (1) of the photovoltaic-storage-direct-flexible integrated energy cabinet. The power conversion module is located below the high-voltage control box (5). A heat dissipation grille (7) for the power conversion module is provided on the lower part of the front of the photovoltaic-storage-direct-flexible integrated energy cabinet (1). The heat dissipation grille (7) for the power conversion module corresponds to the installation position of the power conversion module.

3. The modular photovoltaic-storage-direct-flexible integrated energy cabinet as described in claim 2, characterized in that, The heat dissipation grille (7) of the power conversion module is a long strip louver structure, and a dust filter is fixedly installed on the inner side of the heat dissipation grille (7) of the power conversion module.

4. The modular photovoltaic-storage-direct-flexible integrated energy cabinet as described in claim 1, characterized in that, The communication transmission component is an antenna port (8), which is fixedly installed on the upper side of the integrated photovoltaic-storage-direct-flexible energy cabinet (1). The antenna port (8) is electrically connected to the energy management system inside the cabinet.

5. A modular photovoltaic-storage-direct-flexible integrated energy cabinet as described in claim 1, characterized in that, The safety pressure relief component is an explosion-proof valve (9), which is fixedly installed at the top center of the integrated photovoltaic-storage direct-drive flexible energy cabinet (1). The explosion-proof valve (9) is connected to the lithium iron phosphate battery box inside the cabinet.

6. The modular photovoltaic-storage-direct-flexible integrated energy cabinet as described in claim 1, characterized in that, The battery heat dissipation component is a battery heat dissipation grille (10). The battery heat dissipation grille (10) is symmetrically opened in the lower part of the rear of the integrated photovoltaic-storage direct-flexible energy cabinet (1). The battery heat dissipation grille (10) corresponds to the installation position of the lithium iron phosphate battery box inside the cabinet.

7. The method of using the modular photovoltaic-storage-direct-flexible integrated energy cabinet according to any one of claims 1 to 6, characterized in that, include: Obtain the photovoltaic module information of the photovoltaic-storage-direct-flexible integrated energy cabinet, extract the power generation parameters corresponding to each photovoltaic module, analyze the power generation characteristics of the photovoltaic module based on the power generation parameters, and analyze the power generation efficiency of the photovoltaic-storage-direct-flexible integrated energy cabinet based on the power generation characteristics. The photovoltaic-storage-direct-flexible integrated energy cabinet is subjected to charge and discharge tests, and the charging capacity and discharging capacity of the photovoltaic-storage-direct-flexible integrated energy cabinet are tested. Based on the charging capacity and the discharging capacity, the energy storage unit of the photovoltaic-storage-direct-flexible integrated energy cabinet is constructed. Extract the load information of the photovoltaic-storage-direct-flexible integrated energy cabinet, and calculate the energy output force corresponding to each storage unit in the energy storage unit based on the load information; Calculate the energy output signal corresponding to the energy output force, and calculate the output power value corresponding to the energy output signal. Based on the power generation efficiency and the output power value, analyze the energy supply performance of the integrated photovoltaic-storage-direct-flexible energy cabinet. Combining the power generation efficiency and the energy supply performance, determine the usage method of the integrated photovoltaic-storage-direct-flexible energy cabinet.

8. The modular photovoltaic-storage-direct-flexible integrated energy cabinet and its method of use according to claim 7, characterized in that, The step of analyzing the power generation efficiency of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet based on the power generation characteristics includes: Based on the power generation characteristics, determine the efficiency test items for each component in the photovoltaic module; Based on the efficiency test items and the power generation characteristics, set the test conditions for the photovoltaic module; According to the test conditions, the power generation efficiency test of the photovoltaic module is performed to obtain the module efficiency value; The efficiency values ​​of the components are weighted and combined to obtain the total efficiency value; Based on the preset numerical-level table and the total efficiency value, the power generation efficiency corresponding to the integrated photovoltaic-storage-direct-flexible energy cabinet is obtained.

9. The modular photovoltaic-storage integrated power cabinet and its method of use according to claim 7, characterized in that, The energy storage unit for constructing the integrated photovoltaic-storage-direct-drive-flexible energy cabinet based on the charging capacity and the discharging capacity includes: Calculate the net storage capacity of the integrated photovoltaic-storage-direct-flexible energy cabinet based on the charging capacity and the discharging capacity. Measure the energy storage cavity volume of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet; The energy storage density of the integrated photovoltaic-storage-direct-drive-flexible energy cabinet is calculated using the net stored energy capacity and the energy storage cavity volume. The energy storage cavity is divided into grids to obtain several micro-energy storage cells; Determine the zoned energy storage capacity corresponding to each of the aforementioned micro-area energy storage cells; The energy storage unit of the photovoltaic-storage-direct-flexible integrated energy cabinet is constructed by combining the partitioned energy storage capacity, the micro-area energy storage body, and the energy storage density.

10. The modular photovoltaic-storage-direct-flexible integrated energy cabinet and its method of use according to claim 7, characterized in that, The step of calculating the energy output force corresponding to each storage unit in the energy storage unit based on the load information includes: Collect real-time power data of each electrical device, and use the load information to establish a mapping relationship between the load and discharge power of the energy storage unit, and determine the average discharge power of the energy storage unit under the current load demand; The energy conversion efficiency of the energy storage unit during the discharge process is calculated based on the mapping relationship, and the effective output energy of each group of energy storage units in the energy storage unit is obtained. Based on the effective output energy and the terminal voltage characteristics of the energy storage unit, the energy supply coefficient of the energy storage unit is calculated. Based on the load information, the energy supply coefficient, and the discharge duration of the energy storage unit, the energy output force corresponding to each group of energy storage units is calculated.

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