The end cell voltage is the voltage of a cell or battery at the end of its discharge cycle, when the cell is considered to be fully discharged. It is typically defined as the voltage at which the cell can no longer deliver its rated capacity at the specified discharge rate. The end cell voltage is an important parameter used in battery management systems to ensure the safe and efficient operation of batteries. It helps to prevent over-discharging of batteries and extend their lifespan.

The end cell voltage can vary depending on the type of battery chemistry and cell construction. For example, in lithium-ion batteries, the end cell voltage is typically set at around 3.0V per cell, while for lead-acid batteries, the end cell voltage is usually around 1.8V per cell.

The end cell voltage is also influenced by the discharge rate. Higher discharge rates can lead to a lower end cell voltage due to increased internal resistance and heat generation within the battery. It is important to consider the discharge rate when setting the end cell voltage to ensure that the battery is not damaged.

Monitoring the end cell voltage is essential to ensure battery safety and longevity. Battery management systems continuously monitor the end cell voltage and take appropriate actions, such as disconnecting the load or reducing the discharge current, to prevent the battery from over-discharging. By properly managing the end cell voltage, batteries can be operated safely, efficiently, and within their rated specifications.