Yes, it is necessary to have a BMS (Battery Management System) in a lithium-ion battery system. The BMS is responsible for monitoring and controlling the charging and discharging of the battery cells to ensure they operate within safe limits. It also helps to prolong the battery life and improve overall performance. Without a BMS, the battery can overcharge, over-discharge, overheat, or catch fire, leading to potential safety hazards and damage to the battery.
