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Chapter 1 describes the development of batteries used in electric drive vehicles. The terms used, the types of power batteries and their characteristics and functions, and the key technologies of a battery management system are also introduced.
Chapter 2 gives a general method for analysis of the battery charge/discharge characteristics. An accurate battery model is required to simulate battery performance and state of charge estimation. The state of the art in battery modeling is presented, and the simulation accuracy and adaptation of three battery models for lithium‐ion batteries are discussed. A new algorithm for battery pack modeling,...
Chapter 3 provides the definitions of state of charge( SOC) and state of energy( SOE) for both a single cell and a battery pack. It gives a complete description of the state of the art in SOC estimation. Two algorithms of SOC estimation for lithium iron phosphate batteries and lithium manganese dioxide( LMO) batteries are discussed in detail. The algorithm for LMO can also be used for lithium nickel...
Chapter 4 gives a general definition of battery peak power, and introduces the state of function (SOF) of the battery and its relation to the peak power. It focuses on commonly used testing methods for battery peak power, and provides comparative analysis. A new peak power testing method is developed. The effects of temperature, internal resistance and SOC on battery peak power are discussed. Finally,...
Chapter 5 describes the charging control technologies for lithium‐ion batteries. First, the traditional charging method and its deficiencies are presented and analyzed. Then the key indicators for evaluating charging performance are discussed. Calculation of the polarization voltage and its properties in both the time and SOC domains are described. An improved version of the conventional constant...
Chapter 6 discusses the mechanism of battery inconsistency and its influence on battery performance. The consistency evaluation index selection, consistency quantitative evaluation methods, and equilibrium problems are discussed. A more reasonable equalization control strategy is proposed which can effectively improve the utilization efficiency of the equalizer, reduce the equalizers’ design capacity...
Chapter 7 gives a general method for design and application of the battery management system (BMS). First, the functions and two architectures of BMS are introduced. Then the design of a battery parameters measurement module, including cell voltage, current, and temperature measurement, and isolation detection, is presented and commonly used chips are introduced. Several battery equalization management...
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