Configuration method of aircraft hybrid energy storage unit architecture

Abstract

The invention provides a configuration method of an aircraft hybrid energy storage unit architecture, which belongs to the technical field of electronic information, and comprises the following steps: S1, selecting and combining energy storage forms: comprehensively evaluating power density and energy density of different energy storage forms according to the requirements of each part of an energy storage system, and determining the energy storage forms according to evaluation results; s2, constructing an energy storage system: after determining an energy storage form, evaluating the volume, weight and architecture of the energy storage form, and selecting a final combination mode of the energy storage system; and S3, optimizing a weight strategy: optimizing the weight of the final combination mode of the energy storage system through an energy storage algorithm flow. By adopting the configuration method of the aircraft hybrid energy storage unit architecture, the problem that an aircraft energy storage system in the prior art cannot achieve an ideal state in the aspects of improving energy density and reducing weight at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the field of electronic information technology, and particularly to a configuration method for an aircraft hybrid energy storage unit architecture. Background Art

[0002] In the energy management system of an aircraft, the energy storage unit plays a crucial role. Currently, the commonly used energy storage units for aircraft mainly include two categories: lithium-ion batteries and supercapacitors. Lithium-ion batteries, with their excellent energy density, can store more energy within a limited volume, which is crucial for extending the flight duration of the aircraft and performing long-distance missions. However, a significant drawback of lithium-ion batteries is their relatively large weight, which poses a challenge for modern aircraft designs that pursue lightweight.

[0003] In contrast, although supercapacitors have a lower energy density than lithium-ion batteries, their high power density and extremely fast charge and discharge speeds make them perform well in situations that require instantaneous high-power output. This characteristic enables supercapacitors to respond quickly during aircraft startup, acceleration, and emergencies, providing the required power support. However, the limitation of energy density also means that supercapacitors have deficiencies in long-term power supply.

[0004] To overcome the limitations of these two energy storage units, current aircraft energy management systems generally adopt the strategy of combining energy storage units, aiming to find a balance among energy density, power density, and weight. However, this combined solution still faces many challenges in practical applications, such as large weight and volume occupation, insufficient overall energy density, etc. These problems are directly related to the fuel efficiency, payload capacity, and flight performance of the aircraft. Great success has been achieved in the weight optimization problem of the configuration method and device for aircraft hybrid energy storage units, but most of the existing solutions aim at cost, ignoring the coordination and unity of weight and aircraft performance. Summary of the Invention

[0005] The purpose of the present invention is to provide a configuration method for an aircraft hybrid energy storage unit architecture, which solves the problem that the aircraft energy storage system in the prior art cannot reach an ideal state simultaneously in terms of improving energy density and reducing weight.

[0006] To achieve the above purpose, the present invention provides a configuration method for an aircraft hybrid energy storage unit architecture, including: S1. Select and combine energy storage forms: According to the requirements of each part of the energy storage system, comprehensively evaluate the power density and energy density of different energy storage forms, and determine the energy storage form according to the evaluation results; S2. Construct the energy storage system: After determining the energy storage form, evaluate the volume, weight, and architecture of the energy storage form, and select the final combination method of the energy storage system; S3. Optimize the weight strategy: Optimize the weight of the final combined form of the energy storage system through the energy storage algorithm process.

[0007] Preferably, the energy storage system has three parts: the part responsible for providing fast power response, the part responsible for providing higher power, and the part responsible for providing higher energy.

[0008] Preferably, the combined form of the energy storage system is a combination of a battery and a supercapacitor.

[0009] Preferably, the energy storage algorithm process is as follows: S31. Analyze the working condition requirements: Determine the power requirements of the lithium battery according to the specific working condition requirements. S32. Determine the supercapacitor energy requirements: Determine the energy requirements of the supercapacitor according to the power requirements of the lithium battery. S33. Select supercapacitor monomers: In the built-in supercapacitor database, select the most suitable supercapacitor monomers through comparative calculations based on the energy requirements of the supercapacitor. The supercapacitor monomers include the weight and capacity of the supercapacitor monomers. S34. Optimize the supercapacitor weight: First, set an integer of 100 - 200V for the initial discharge voltage as the independent variable. Given the weight and capacity of the supercapacitor monomers in each solution, establish a function with the supercapacitor weight as the dependent variable. By solving the minimum solution of this function, calculate the optimal weight solution of the supercapacitor that meets the working condition requirements.

[0010] Therefore, the present invention adopts the above-mentioned configuration method for an aircraft hybrid energy storage unit architecture, and the technical effects are as follows: 1. Comprehensive performance optimization: By comprehensively evaluating the power density and energy density of different energy storage forms, a hybrid energy storage system that can meet both the fast power response requirements and provide continuous high power and high energy is constructed.

[0011] 2. Significant weight optimization: By introducing the energy storage algorithm process, the weight of the energy storage system is further optimized, reducing the weight of the energy storage system and improving the fuel efficiency and payload capacity of the aircraft.

[0012] 3. Strong adaptability: It is not only applicable to the combined energy storage system of a battery and a supercapacitor, but also can flexibly adjust the selection and combination form of the energy storage form according to specific requirements. Description of the Drawings

[0013] Figure 1 It is a characteristic diagram of different categories of energy storage technologies; Figure 2 It is a comparison diagram of the overall performance indicators of the hybrid energy storage unit; Figure 3It is a flow chart of the energy storage algorithm. Specific implementation manners

[0014] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs.

[0016] Embodiment 1 The present invention provides a configuration method for an aircraft hybrid energy storage unit architecture. In view of the special requirements for the energy storage system during the aircraft flight maneuver, an energy storage form combining a battery and a supercapacitor is selected. By optimizing the energy storage algorithm, the optimal weight solution of the supercapacitor under the condition of meeting the working conditions requirements is determined.

[0017] To meet the mission requirements, first, the selected energy storage form needs to have as high energy density and power density as possible. According to the requirements of each part of the energy storage system, the power density and energy density of different energy storage forms are comprehensively evaluated. Among them, there are parts in the energy storage system responsible for providing fast power response, parts responsible for providing higher power, and parts responsible for providing higher energy.

[0018] As Figure 1 shown in the research results of the power density and energy density of various different energy storage forms, it can be seen that power sources such as flywheel energy storage, batteries, and supercapacitors cannot meet both of these characteristics at the same time. Therefore, a combined use is required to obtain better output dynamic characteristics and system efficiency.

[0019] Figure 2 It is a comparison chart of the overall performance indicators of each energy storage technology. By combining the characteristics of the energy storage form itself and the mission requirements, the energy storage forms suitable for the load characteristics of the project are lithium batteries, flywheels, and supercapacitors. Since the flywheel is a rotating mechanism, it is easy to affect the flight attitude and its own rotation during the aircraft flight maneuver. Therefore, the energy storage system finally selects the form of combining a battery and a supercapacitor.

[0020] Generally speaking, supercapacitors are known for their large single-cell capacity. In this context, the voltage of the supercapacitor module becomes a key factor determining its overall weight, which is specifically reflected in the number of supercapacitor cells connected in series. For the battery, considering feasibility and performance, commercial LG 18650 battery cells are selected to construct the battery module. When dealing with short-term load demands, the electrical energy is completely provided by the battery. It should be noted that the LG 18650 battery cell has clear specifications, with a nominal voltage of 3.6V, a capacity of 3Ah, and the weight of a single cell is approximately 50 grams. When determining the number of batteries, the calculation is strictly based on the capacity (Ah) parameter of the battery cells. Ensure that regardless of whether a low-voltage or high-voltage battery solution is adopted, the number of battery cells required to meet the short-term high-discharge demand remains the same.

[0021] Through the energy storage algorithm process, the weight of the final combination of the energy storage system is optimized, while ensuring the performance of the energy storage system, reducing the overall weight of the energy storage system. As Figure 3 shown, first, determine the longest discharge time of the lithium battery according to the working condition requirements, thereby calculating its power demand, and setting the energy demand of the supercapacitor accordingly. The short-term power is jointly supplied by the lithium battery and the supercapacitor. Among various short-term power solutions, select the solution with the largest energy provided by the supercapacitor to determine its energy demand.

[0022] Compare and calculate in the supercapacitor database to select the most suitable supercapacitor cell. The weight of the supercapacitor only depends on the initial discharge voltage and the series-parallel connection number, and the initial discharge voltage is set within the integer range of 100 - 200V. After knowing the weight and capacity of the supercapacitor cells in each solution, establish a function with the weight of the supercapacitor as the dependent variable. By solving the minimum value of this function, the optimal weight solution of the supercapacitor that meets the working condition requirements can be obtained.

[0023] Therefore, the present invention adopts the above-mentioned configuration method for an aircraft hybrid energy storage unit architecture, solving the problem in the prior art that the aircraft energy storage system cannot achieve an ideal state simultaneously in terms of improving energy density and reducing weight.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the present invention or make equivalent replacements, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A configuration method for an aircraft hybrid energy storage unit architecture, characterized in that: include: S1. Select and combine energy storage forms: According to the needs of various parts of the energy storage system, conduct a comprehensive evaluation of the power density and energy density of different energy storage forms, and determine the energy storage form based on the evaluation results; S2. Build the energy storage system: After determining the energy storage form, evaluate the volume, weight and architecture of the energy storage form and select the final combination of the energy storage system; S3. Optimize weight strategy: Optimize the weight of the final combination of the energy storage system through the energy storage algorithm process.

2. The configuration method of a hybrid energy storage unit architecture for an aircraft according to claim 1, characterized in that: The energy storage system has three parts: a part responsible for providing fast power response, a part responsible for providing higher power, and a part responsible for providing higher energy.

3. The configuration method of a hybrid energy storage unit architecture for an aircraft according to claim 1, characterized in that: The energy storage system is a combination of batteries and supercapacitors.

4. The configuration method of a hybrid energy storage unit architecture for an aircraft according to claim 1, characterized in that: The energy storage algorithm process is as follows: S31. Analyze working condition requirements: determine the power requirements of the lithium battery according to the specific working condition requirements; S32, determining the energy requirement of the supercapacitor: determining the energy requirement of the supercapacitor according to the power requirement of the lithium battery; S33, selecting a supercapacitor cell: in a built-in supercapacitor database, based on the energy demand of the supercapacitor, a most suitable supercapacitor cell is selected through comparative calculation, where the supercapacitor cell includes the supercapacitor cell weight and cell capacity; S34, optimize the weight of supercapacitor: first set the initial discharge voltage to an integer of 100-200V as the independent variable, and when the weight and capacity of each supercapacitor cell are known, establish a function with the weight of supercapacitor as the dependent variable, and calculate the optimal weight solution of the supercapacitor that meets the working conditions by solving the minimum solution of the function.

Images