Explain the energy and power of lithium-ion batteries for new energy vehicles

The energy of the battery refers to the electric energy that the battery can output under a certain discharge system, in Wh or kWh. It affects the driving range of electric vehicles. The energy of a battery is divided into total energy, theoretical energy, actual energy, specific energy, energy density, charging energy, and discharging energy. (1) Total energy Total energy refers to the sum of the electrical energy output of the battery during its life cycle. (2) Theoretical energy Theoretical energy is the product of the theoretical capacity of the battery and the rated voltage, which refers to the energy output by the battery under the discharge conditions specified by a certain standard. (3) Actual energy Actual energy is the product of the battery's actual capacity and the uniform working voltage, which represents the energy that the battery can output under certain conditions. (4) Specific energy Specific energy is also called mass specific energy, which refers to the electric energy that a battery can output per unit mass, in Wh/kg. The specific energy is often used to compare different battery systems. Specific energy is divided into theoretical specific energy and actual specific energy. Theoretical specific energy refers to the energy that can be output theoretically when 1kg of battery reactant material is completely discharged; actual specific energy refers to the actual energy that can be output from 1kg of battery reactant material. Due to the influence of various factors, the actual specific energy of the battery is much smaller than the theoretical specific energy. The specific energy of the battery is a comprehensive index, which reflects the quality level of the battery. The specific energy of the battery affects the vehicle quality and driving range of electric vehicles, and is an important indicator for evaluating whether the power lithium-ion battery of electric vehicles meets the predetermined driving range. (5) Energy density Energy density is also called volume specific energy, which refers to the electric energy that a battery can output per unit volume, and the unit is Wh/L. (6) Charging energy Charging energy refers to the electrical energy input into the battery through the charger. (7) Discharge energy Discharge energy refers to the electrical energy output when the battery is discharged. 2. Power The power of a battery refers to the amount of energy that the battery can output per unit of time under a certain discharge system, in W or kW. The power of the battery determines the acceleration performance and climbing ability of the electric vehicle. (1) Specific power The power that a battery can output per unit mass is called specific power, also known as mass specific power, in W/kg or kW/kg. (2) Power density The output power obtained from the unit mass or unit volume of the battery is called power density, and the unit is W/kg or W/L. The output power obtained from the unit mass of the battery is called the mass power density; the output power obtained from the unit volume of the battery is called the volume power density. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Lithium battery packaging process