Introduce the basic theory of lithium battery quick charging

Source: 2020 - 04 - 11 eliakim hits: once a new method of space of lithium battery quick charging abstract: in order to overcome the traditional high-power microwave remote sensing satellites' constant current constant voltage single strategy, charging time is long, such as faults, based on the three laws of mas a depolarization, speed up the process of charging, the new space is lithium battery quick charging strategy, namely in a charging cycle, using multilevel piecewise constant current charging, and add the fixed threshold short discharge, the method can improve lithium battery charging current, and does not reduce the cycle life of the battery. In MATLAB/SIMULINK software, based on the solar array sequence switch in parallel of unregulated busbar voltage power system simulation model, and the instance simulation and comparative analysis. The results show that the fast charging strategy can save more than 56 times charging time, charging effectively eliminate polarization. In this paper, the research results can be more for future on-orbit lithium-ion batteries charging mode control provides new train of thought. Key words: space lithium batteries; Quick charge; Electric charge; Don't adjust the bus lithium batteries because of its high energy, small thermal effect, no memory effect, etc, becoming the third after cadmium nickel battery, nickel metal hydride battery energy storage power generation of space. Lithium battery cycle life are the important factors that affect the service life of the spacecraft in orbit. The traditional view, large current charge will cause irreparable damage to the battery positive electrode active material, can also lead to board gate corrosion, gas chromatography, etc, and make a battery premature failure, therefore, the current usually adopt the method of conservative, in choosing a small constant current charging charging curve to a fixed value, with a small fee, in exchange for a longer cycle life. But in the actual satellite payload using microwave class load, for example, often faced with the huge energy consumption, long working hours lead to 'shadow' light rail loop storage battery charging and discharging imbalance, or satellite after urgent tasks, quick charge battery discharge depth, and so on, is an urgent need to find a high charging efficiency and charging time is short and small influence the service life of the battery quick charging method. At present, in the field of ground electric cars and other new energy research on lithium battery quick charging more. Literature research the on-board battery fast charge method and the design of fast charging stations on the ground, the result is available for reference. This paper first introduces the basic theory of lithium battery quick charging, and connecting with the more mature doesn't adjust Se - bus power system topology structure Quential type switch shunt regulator ( S3R) Model to study the lithium battery quick charging method. Finally the simulation and verification results are given. This paper introduces ground electric lithium battery quick charging strategy the aerospace field. Based on the three laws of Mars, this paper proposes a new method of quick charge lithium battery space, namely in a charging cycle using multilevel 'constant current charging, and increase the short discharge with fixed threshold. Established in MATLAB/SIMULINK S3R random bus power system simulation model, the traditional li-ion batteries' constant current constant voltage charging strategy and quick charge strategy proposed in this paper compared the simulation. The simulation results show that the fast charging strategy can save more than 56 times charging time, shorten the charging process. Need to point out that most of the spacecraft in stable load, do not need to be quick charge in orbit. And for a short period of time need high power load application spacecraft, such as synthetic aperture radar ( SAR) Payload of satellite, the fast charging strategy can increase the SAR payload startup time, extend the working hours, to provide users with better service. Future satellite payload is developing towards high power and diversification. In this paper, the fast charging method for lithium battery on-orbit control charging mode provides a new train of thought.