A battery string refers to a series-connected group of battery cells or modules designed to reach a specific voltage level required by the system it powers. In large battery systems—such as those in electric vehicles (EVs) or battery energy storage systems (BESS)—multiple cells or modules are connected in series to form a string, which is then often combined with other strings in parallel to meet both voltage and capacity requirements.
Purpose of Battery Strings:
Achieve desired system voltage levels
Enable modular design for scalability
Improve fault isolation and system redundancy
Facilitate thermal and electrical balancing
