Battery -
Two or more electrochemical energy cells connected together to provide electrical energy.
Battery Management System (BMS) -
Electronic circuits designed to monitor the battery and keep it within its specified operating conditions and to protect it from abuse during both charging and discharging.
Battery Monitoring -
Sometimes confused with BMS of which it is an essential part, these circuits monitor the key operating parameters (current, voltage, temperature, SOC, etc.) of the battery and provide information to the user.