Reserch On Equalization Strategy Of Efficient Battery

With the rapid development of modern economy, the degree of human dependence on fossil energy such as oil and gas is higher and higher, the resulting environmental and energy sustainability problems is more and more prominent. In recent years, power battery is widely used in electric vehicles, mobile communication equipment and space power etc. Lithium-ion batteries because of its high capacity and rechargeable no memory are widely used in power systems. Lithium-ion battery cell voltage is low, to meet the power system of high voltage, large current demand is usually a number of lithium ion battery monomer used in series, with battery recycling, battery inconsistency gradually increased, making the battery too frequently crossed the discharge cause irreparable damage to the battery, the battery may cause serious explosion, stable and efficient cell balancing system is the only way to solve this problem. The main purpose of this paper is to establish a stable and efficient system solution for balancing the inconsistency of the battery pack.In this paper, a combination of simulation and experimental approach to the theoretical analysis and functional verification, first, to analyze the causes and effects about the inconsistency of battery, to reflect on cell inconsistency of balanced elements validation analysis respectively, come to the most appropriate balance detection variables, provide the basis for the establishment of a balanced system. In this paper, the equilibrium system is mainly divided into monitoring module, main control module, the control algorithm module and equalization circuit four modules, monitoring module used market application mature AD7820 A chip solutions, and can provide the battery monomer voltage, current and temperature accurately, with MSP430 micro-controller as the master control system to coordinate the operation of each module.Face numerous studies have proposed equalization circuit scheme comparative analysis, select and optimize the Cük circuit as an efficient balancing circuit. This circuit of deformation Cük has a bidirectional charge and discharge cycle in a sustainable balance the advantages of these make this circuit is highly efficient equalization circuit topology. This paper studies efficient strategy lies in the intelligent of battery equalization, analysis of the advantages and disadvantages of fuzzy control theory in battery equalization and introduces ANFIS, a good combination system of the adaptive neural networks and fuzzy algorithm, into battery equalization system. Fuzzy of ANFIS system can effectively use that experience to avoid complex battery model, at the same time, along with the change of state in the battery from the adjustment control system make the equilibrium system has efficient equilibrium output. Get a complete, balanced and efficient system.This system has been simulation analysis and experimental verification, the system efficient and stable, easy modular implementation, for balancing a large capacity power battery pack provides an effective solution.