NOVELTY - The system (100) has a set of cylindrical containers operatively connected to a set of cooling passages (112), where an inert high pressure refrigerant is filled in the containers. A set of sensors is operably connected to a set of individual battery cells (104) i.e. individual lithium ion battery cells, and detects a thermal runaway event related to the individual battery cells. An injector system injects the refrigerant from the containers into the cooling passages upon detection of the thermal runaway event by the sensors, so that the thermal runaway event is rapidly quenched.    USE - Battery management system for thermally managing individual battery cells i.e. individual lithium ion battery cells, of a battery pack e.g. lithium ion battery pack high capacity lithium ion battery pack, in an energy storage system from thermal runaway events in an electrochemical cell management and thermally integrated fire suppression apparatus (claimed) for a vehicular application e.g. hybrid electric vehicle, fully electric vehicle, unmanned vehicle, submarine, airplane or aerospace system, tactical vehicle and naval system. Can also be used for grid storage and uninterruptable power supply.    ADVANTAGE - The injector system injects the refrigerant from the containers into the cooling passages upon detection of the thermal runaway event by the sensors, so that the thermal runaway event is actively and rapidly quenched in a better manner. The system uses a set of modular fire extinguishers within the battery pack, so that the battery pack has a prolonged service life and is safe, thus enabling a widespread adoption of the battery pack for the vehicular application.    DETAILED DESCRIPTION - The sensors are radio frequency identification (RFID) sensors. INDEPENDENT CLAIMS are also included for the following:    (1) a method for thermally managing a battery pack having a set of individual battery cells from a set of thermal runaway events    (2) an electrochemical cell management and thermally integrated fire suppression apparatus comprising a fire suppression system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a battery management system with a thermally integrated fire suppression system.    Battery management system (100)    Lithium ion battery pack (102)    Individual battery cells (104)    Modular linked design (106)    Cooling passages (112)