Battery, battery controller, and method for the secured digital transmission of current measurement values

Abstract

The invention relates to a method for the secured digital transmission of current measurement values and to a battery () and a battery controller () which are suitable for carrying out the method. The method has the steps of detecting (SS) an amplitude of a battery current (I) in a battery () using a first and a second sensor (), generating (SS) a first and a second bit sequence, each of which describes the detected amplitude, generating a mirrored second bit sequence () by reversing (S) a sequence of the bits provided by the second bit sequence (), simultaneously transmitting (S) the first bit sequence via a first data bus () and the mirrored second bit sequence () via a second data bus () to a battery controller (), generating a second bit sequence () by reversing (S) a sequence of the bits provided by the mirrored second bit sequence () after the simultaneous transmission (S), and finally detecting (S) a possible error in the first bit sequence or the second bit sequence () by comparing the first bit sequence () with the second bit sequence (). Transmission faults are thus detected in particular in a transmission path between the sensors of the battery and the battery controller, said faults being caused by a common disturbance. Additionally, faults can also be detected which are caused by a disturbance that only affects one of the sensors or a part of the transmission path.