Method for determining volume and volume change of a single-cell battery e.g. high voltage battery used in vehicle, involves evaluating changed level of liquid and change to battery working force for determining volume of battery

摘要

The method involves immersing the single-cell battery (1) completely into a liquid (7). The changed level of the liquid and the change to the single-cell battery working force are evaluated for determining the volume of the single-cell battery. The liquid is included with an electrically non-conducting fluid such as deionized water. The working force on the single-cell battery is indirectly detected over a spring force sensor, and is directed to the spring force sensor over a deflection device of the battery. The lithium ion cell and pouch cell are used in the battery.