Storage battery arrangement with improved condition monitoring

A motor vehicle having a storage battery arrangement, wherein the storage battery arrangement comprises:

• a plurality of storage battery cells connected in a series circuit comprising at least a first storage battery cell and a second storage battery cell;
• a central network node configured to transmit data using the plurality of storage battery cells, and which is connected to the series circuit of the plurality of storage battery cells;
• a plurality of cell network nodes having at least a first cell network node and a second cell network node, the plurality of cell network nodes being configured to transmit data using the plurality of storage battery cells, wherein each of the plurality of cell network nodes is connected in parallel with a corresponding storage battery cell of the plurality of storage battery cells;
• and
• a control device configured to:
• instruct at least the first cell network node to apply a test signal at least one predetermined frequency to the first storage battery cell to which the first cell network node is connected, which test signal passes through the series circuit of the plurality of storage battery cells, and
• instruct the second cell network node, which is connected to the second storage battery cell, to determine at least one state of the second storage battery cell on the basis of a signal response of the second storage battery cell to the test signal.

A method for determining the state of a storage battery cell of a storage battery arrangement having a plurality of storage battery cells connected in a series circuit and having a plurality of cell network nodes, including a first and a second cell network node, each of which is connected in parallel with a corresponding one of the plurality of storage battery cells, wherein the method comprises:

• transmitting an instruction signal using at least a first storage battery cell of the plurality of storage battery cells, with which the first cell network node is connected in parallel, from a central network node to the second cell network node which is connected in parallel with a second storage battery cell of the plurality of storage battery cells;
• applying a test signal at least one predetermined frequency to the first storage battery cell using the first cell network node if the instruction signal is received, which test signal passes through the series circuit of the plurality of storage battery cells;
• and
• determining at least one state of the second storage battery cell based on a signal response of the second storage battery cell to the test signal if the instruction signal is received.