Method for monitoring and controlling a battery pack, system for monitoring and controlling a battery pack, battery management system

A system (100) for monitoring and controlling a battery pack (24) of a vehicle (10), which battery pack comprises a plurality of battery cells (2) interconnected in parallel and/or in series, the battery cells (2) each comprising a switching unit (40) which serves to connect and disconnect the respective battery cells (2) separately, the system (100) comprising:

• a GPS module (12) of the vehicle (10),
• a power prediction module (14) configured to predict an electrical power requirement (Pelec) of the vehicle (10) on the basis of information GPSInfo acquired by the GPS module (12), wherein the information GPSInfo includes a speed and location of the vehicle (10),
• a state estimation module (60) configured to estimate a state (xs) of the battery pack (24) on the basis of pack information, and
• a control device (70) configured to calculate an optimized activation pattern (u*) for actuating the switching units (40) on the basis of the predicted electrical power requirement (Pelec) and the estimated state (xs) of the battery pack (24), and to actuate the switching units (40) of the respective battery cells (2) according to the optimized activation pattern (u*) for actuating the switching units (40) for connecting and disconnecting the respective battery cells (2).

A battery system (20) of a vehicle (10), comprising at least one battery pack (24) having a plurality of battery cells (2) interconnected in parallel and/or in series, each comprising a switching unit (40) which serves to connect and disconnect the respective battery cells (2) separately,

• wherein
• the battery system (20) is configured to
• predict an electrical power requirement (Pelec) of the vehicle (10) on the basis of information GPSInfo acquired via a GPS module (12), wherein the information GPSInfo includes a speed and location of the vehicle (10),
• estimate a state (xs) of the battery pack (24) on the basis of pack information, and
• calculate an optimized activation pattern (u*) for actuating the switching units (40) on the basis of the predicted electrical power requirement (Pelec) and the estimated state (xs) of the battery pack (24), and to actuate switching units (40) of the respective battery cells (2) according to the optimized activation pattern (u*) for actuating the switching units (40) for connecting and disconnecting the respective battery cells (2).

A vehicle (10) comprising

• A battery pack having a plurality of battery cells (2) interconnected in parallel and/or in series, the battery cells (2) each comprising a switching unit (40) which serves to connect and disconnect the respective battery cells (2) separately, the vehicle configured to:
• acquire, via one or more sensors, pack information of the battery pack (24), the pack information comprising at least cell voltages (Vmes), cell temperature (Tmes) of the respective battery cells (2), and a pack current (Ipack, mes);
• calculate a pack voltage (Vpack) of the battery pack (24) on the basis of the cell voltages (Vmes) of the respective battery cells (2) and a current activation pattern (u) for actuating the switching units (40);
• predict, via a power prediction module (14), an electrical power requirement (Pelec) of the vehicle (10) based on information GPS Info acquired by a GPS module (12) of the vehicle (10), wherein the information GPSInfo includes a speed and location of the vehicle (10);
• estimate, via a state estimation module (60), the state (xs) of the battery pack (24) based on the pack information and the current activation pattern (u);
• calculate, via a control device, an optimized activation pattern (u*) for actuating the switching units (40) on the basis of the predicted electrical power requirement (Pelec) and the estimated state (xs) of the battery pack (24);
• and
• actuate, via the control device, the switching units (40) of the respective battery cells (2) according to the optimized activation pattern (u*) for actuating the switching units (40) for connecting and disconnecting the respective battery cells (2).