Solid-state compressor and method for providing counter pressure on a solid-state compressor cell stack

A solid-state compressor for electrochemically compressing a fluid, comprising:

• a compressor cell stack, comprising at least one compressor cell having a membrane electrode assembly sandwiched between two cell plates,
• an enclosure comprising two opposing and interconnected flanges, clamping the compressor cell stack at opposing sides thereof, and
• two contact bodies, each of the two contact bodies interposed between the enclosure and a different one of two opposing sides of the compressor cell stack, and
• two spaces, each of the two spaces enclosed between the enclosure and a respective contact body of the two contact bodies, each of the two spaces configured to contain a hydraulic fluid under pressure,
• wherein a first space of the two spaces located on a first side of the opposing sides is hydraulically connected to a hydraulic fluid reservoir by means of a hydraulic fluid line;
• wherein a second space of the two spaces located on a second side of the opposing sides is not hydraulically connected to the hydraulic fluid reservoir or the first space to maintain a passive pressure compensation system on the second side;
• wherein the first side of the opposing sides is the cathode side of the membrane electrode assembly;
• and
• wherein the two opposing flanges respectively grip around each of the two contact bodies, thereby entirely enclosing a first surface of a first contact body of the two contact bodies opposing a second surface of the first contact body of the two contact bodies contacting an outer surface of the compressor cell stack and a first surface of a second contact body of the two contact bodies opposing a second surface of the second contact body of the two contact bodies contacting the outer surface of the compressor cell stack.