Power lithium battery as the main energy storage equipment in electric vehicles, energy storage systems and other fields, its performance is directly related to the mileage, acceleration performance and stability of the equipment. When evaluating the performance of power lithium battery, four basic parameters are very important, including voltage, capacity, cycle life and charge and discharge efficiency. This article will introduce these four basic parameters in detail to help readers understand the performance characteristics and selection criteria of power lithium batteries more comprehensively.

I. Voltage

1. definition:

   • voltage refers to the potential difference generated by the power lithium battery during charging and discharging, which is usually expressed in volt (V). Voltage directly determines the output power and performance of the battery.

2. Importance:

   • voltage is one of the important parameters to measure the performance of power lithium battery. High voltage represents higher power output and can provide stronger power support.

II. Capacity

1. definition:

   • capacity refers to the amount of electricity that can be stored by the power lithium battery, which is usually expressed in hours (Ah). Capacity directly affects the battery mileage and usage time.

2. Importance:

   • capacity is one of the key parameters for evaluating the performance of power lithium batteries. High capacity means longer endurance and longer service time, which is an important indicator for electric vehicles and energy storage systems.

III. Cycle life

1. definition:

   Cycle Life refers to the performance attenuation of power lithium battery after several charge-discharge cycles, which is usually expressed in the number of cycles. Cycle life is directly related to the service life and reliability of the battery.

2. Importance:

   • cycle Life is one of the important parameters to evaluate the quality of power lithium battery. High cycle life represents that the battery has a long service life and stability, which is the key index to be considered when selecting power lithium battery.

IV. Charge and discharge efficiency

1. definition:

   • charge and discharge efficiency refers to the energy conversion efficiency of power lithium battery during charging and discharging, usually expressed as a percentage. High charging and discharging efficiency means that the battery has high energy utilization rate and can provide higher energy efficiency and service life.

2. Importance:

   • charge-discharge efficiency is one of the important indexes to evaluate the performance of power lithium batteries. High charge-discharge efficiency can improve the energy utilization efficiency of batteries and reduce energy waste, which is an important parameter to be considered when selecting power lithium batteries.

The performance of power lithium battery is directly related to the Operation effect and stability of electric vehicles, energy storage systems and other equipment. This paper introduces four basic parameters of power lithium battery, including voltage, capacity, cycle life and charge and discharge efficiency, and explains the definition and importance of these parameters in detail. When selecting and evaluating power lithium batteries, these basic parameters need to be considered comprehensively to ensure that appropriate batteries are selected to meet actual needs.