Method and apparatuses for authenticating measurement data for a battery

A data structure comprising:

• measurement data from battery units;
• and
• at least one additional information carrier that is configured to check the validity of the measurement data when the data structure is read by a computer device,
• wherein the data structure has been created during the performance of the method, the method including:
• capturing measurement data for the battery module using at least one sensor and transmitting the captured measurement data to the module controller;
• ascertaining at least one additional information carrier, which is configured to authenticate the measurement data, with the module controller;
• transmitting the measurement data and the additional information carrier from the module controller to the central controller;
• and
• validating the measurement data with the central controller using the additional information carrier,
• wherein the additional information carrier is a checksum that is generated by the module controller as a function of the measurement data and an individual key of the module controller, and
• wherein validating the measurement data includes:
• calculating a received signature based on the transmitted measurement data and the individual key of the module controller using the central controller, the received signature corresponding to a checksum that is generated by the central controller as a function of the transmitted measurement data and the individual key of the module controller, and
• comparing the received signature with a transmitted signature to determine whether the transmitted measurement data is valid, the transmitted signature corresponding to the checksum received from the module controller.

A battery management system for a battery that includes at least one battery module having an associated module controller, and a central controller, comprising:

• a capturing unit configured to capture measurement data from battery units;
• a carrier unit configured to ascertain an additional information carrier that is set up to authenticate the measurement data;
• transmitting units configured to transmit the measurement data and the additional information carrier from the module controller to the central controller;
• and
• a validating unit configured to validate the measurement data using the additional information carrier,
• wherein the additional information carrier is a checksum that is generated by the module controller as a function of the measurement data and an individual key of the module controller, and
• wherein validating the measurement data includes:
• calculating a received signature based on the transmitted measurement data and the individual key of the module controller using the central controller, the received signature corresponding to a checksum that is generated by the central controller as a function of the transmitted measurement data and the individual key of the module controller, and
• comparing the received signature with a transmitted signature to determine whether the transmitted measurement data is valid, the transmitted signature corresponding to the checksum received from the module controller.