Fluid cell and docking station

A fluid cell for an assembly with a docking station and for filtering oil, the fluid cell comprising:

• a fluid cell housing partly surrounding a housing interior and comprising a housing opening, wherein the housing interior has a differential volume;
• a housing cover that can be releasably attached or is releasably attached to the fluid cell housing for closing the housing opening;
• a filter device arranged in the housing interior for filtering the oil, in which a filter element is arranged and which fluidically communicates with a raw oil line for conducting the oil to be filtered into the filter device and having a clean oil line for conducting the filtered oil out of the filter device;
• an oil reservoir for storing oil, which has a variable volume, which is arranged in the housing interior, and which fluidically communicates with an oil reservoir line for conducting oil out of the oil reservoir, wherein the oil reservoir is formed by a covering made of a flexible material, and wherein the oil reservoir is configured to adjust a first volume of the oil reservoir to a second volume of the oil stored in the oil reservoir;
• and
• a fluid cell valve device for closing and opening the raw oil line, the clean oil line, and the oil reservoir line.