Method for operating a battery system and electric vehicle and battery system for an electric vehicle

摘要

The invention relates to a method for operating a battery system (10) for an electric vehicle, comprising a plurality of battery strings (7) that can be connected in parallel, each battery string (7) having at least one battery module (5), and each battery module (5) having at least one battery cell The individual battery strings (7) can be connected separately and independently of one another to a collecting line (63), only a selected number of the battery strings (7) being switched on when the battery system (10) is discharged, so that at least one of the battery strings ( 7) remains switched off constantly. The invention also relates to a battery system (10) for an electric vehicle, comprising a plurality of battery strings (7) which can be connected in parallel, each battery string (7) having at least one battery module (5), and each battery module (5) having at least one battery cell, and Each of the battery strings (7) is assigned a separate string switch (61), by means of which the individual battery strings (7) can be connected separately and independently of one another to a collecting line (63), and a management system (20) for monitoring the battery strings (7) and for controlling the string switches (61), the management system (20) being set up to carry out the method according to the invention.