Battery Characteristics and Parameters

This chapter covers the basic concept, development status, and development trends of lithium-ion batteries. The state of charge (SOC), state of health (SOH), state of power (SOP), state of energy (SOE), and service life are described from different aspects, which makes the research of lithium-ion batteries more standardized and comprehensive. This chapter also analyzes the basic parameters of lithium-ion batteries, such as terminal voltage, electromotive force, capacity, internal resistance, and the core elements of battery state, such as SOC, depth of discharge (DOD), cycle life, and self-discharge rate. The lithium-ion battery industry is an important direction of global high-tech development now. Because the lithium-ion battery has good electrochemical stability, large energy density, long battery life, and maintenance-free characteristics, it is widely used in electric vehicles and a variety of energy storage equipment. With the electric vehicles, lithium-ion batteries are gradually moving toward the market, so the usage and consumption of lithium resources in the world have increased significantly, resulting in the huge and broad development prospects of the industrial chain.