Car Battery Use Process

Cut-off discharge voltage of an automobile battery: when the automobile battery is discharged, the voltage drops to the lowest working voltage value at which the battery should not be discharged. According to different battery types and different discharge conditions, the requirements for battery capacity and life are also different, so the specified battery discharge termination voltage is also different. Open circuit voltage OCV: When the car battery is not discharged, the potential difference between the two poles of the battery is called the open circuit voltage.

The open circuit voltage of a battery will vary depending on the materials of the battery's positive and negative electrodes and the electrolyte. If the materials of the battery's positive and negative electrodes are exactly the same, the open circuit voltage is the same regardless of the size of the battery and how the geometric structure changes. Depth of discharge (Depth of discharge DOD): In the process of battery use, the battery discharge capacity as a percentage of its rated capacity, called the depth of discharge. The depth of discharge has a deep relationship with the charge life of the secondary battery. When the depth of discharge of the secondary battery is deeper, the charge life is shorter. Therefore, deep discharge should be avoided when using it.