The discharge characteristics of ordinary lithium batteries

During the discharge process, its working voltage will change with time. The most basic discharge curve is the voltage-time, current-time-time curve. Voltage-SOC curve, etc.

Analysis of lithium battery discharge curve

1. Energy consumption of lithium batteries in the discharge process

Theoretical analysis: The battery is in a stable state during discharge. The discharge voltage is maintained at the EME value, and the utilization rate of the active ingredient is 100%. In this case, the output power of the battery is theoretically. The biggest function is the maximum.

Actual energy: During the battery discharge, the actual output energy is called "real energy". At room temperature, the battery is discharged at a current of 1i1 (A). When the final voltage is reached, the whim, which is the rated energy.

Energy density: The energy represented by the unit quality and unit volume, also known as mass or volume ratio, is also called energy density. Weight/kg or weight/liter to unit.

2. SOC and DOC in the lithium battery discharge process

SOC (Stateofcharge) refers to the ratio of the remaining power to the power when the battery is completely charged under a specific discharge multiple after a period of time or long time.

DOD (DEPTHOFDISCHARGE) means that the depth of discharge refers to the percentage of the discharge capacity accounting for the total discharge capacity. The depth of discharge is closely related to the service life of the battery: the deeper the depth of discharge, the shorter the service life. The relationship between the two is SOC = 100%-DOD.