Device and method for monitoring battery cells and battery module, battery, battery system, vehicle, computer program and computer program product

摘要

The present invention relates to a device (500) for monitoring a plurality of battery cells (1001, ... 100m, 1001, ... 10018) connected together to form a plurality of replacement cells (2001, ... 200j, ... 200n ; 2001, ... 2006), characterized by: means (530) for receiving (615) measured values for total and total currents of the replacement cells (2001, ... 200j, ... 200n, 2001, .. 2006); means (510) for determining (620) parameter values of the spare cells (2001, ... 200j, ... 200n, 2001, ... 2006) for parameters of the spare cells (2001, ... 200j, ... 200n 2001, ... 2006) from the received measured values; means (510) for forming (625) average values for the determined parameter values of the spare cells (2001, ... 200j, ... 200n, 2001, ... 2006); means (510) for comparing (630), for each parameter of the spare cells (2001, ... 200j, ... 200n; 2001, ... 2006), the parameter values with the averaged mean values of the parameter to a significant difference; means (510) for determining (640), when a particular parameter value of one of the replacement cells (2001, ... 200j, ... 200n; 2001, ... 2006) is significantly different from the mean value of the parameter (630.2), that in the spare cell (200j) there is a possible error case; means (510) for determining (645), for the spare cell (200j) in which a possible fault condition exists, parameter values of the battery cells for the parameters of the battery cells of said replacement cell (200j) and determining quantitative differences between the parameter values of the battery cells; means (510) for checking (650) whether the determined quantitative differences result in an improper operating condition; and means (510) for determining (660) if the determined quantitative differences result in an improper operating condition (650.1) indicating a fault condition and initiating or causing (665) a countermeasure appropriate for the particular fault condition, a battery module (400 ), a battery, a battery system (20; 30), a vehicle, a method, a computer program, and a computer program product.