Circuitry for monitoring battery systems

A circuitry for a battery management system of a vehicle for adapting at least one cell information item via at least one battery cell to a communication system of the vehicle, the circuitry comprising:

• a first processing element for generating a message and a test information item in accordance with a first processing, the message being specific to the cell information;
• at least one second processing element for generating the same message in accordance with at least one second processing, wherein the first processing element is designed for generating the test information as a test value for the message on the basis of the message in accordance with the first processing, so that the test value is also executed for checking the message in accordance with the second processing;
• and
• a communication system interface for outputting an output instruction to the communication system, the output instruction being at least partially composed of the message in accordance with the second processing and of the test information, so that the output instruction is specific to the first and second processing.