We study the possibility of detecting the background of supernova relic neutrinos (SRN) with liquid argon time projection chamber (TPC) detectors. As far as this study is concerned, these experimental devices are mainly sensitive to electron neutrino signals, and could provide further information on both the supernova explosion mechanism and the star formation rate at redshifts . We study in detail the main contributions to background in the relevant energy range from 8 B and hep solar neutrinos as well as from low energy atmospheric neutrino fluxes. Depending on the theoretical prediction for the SRN flux we find that for a 3 kton and a 100 kton liquid argon TPC detector the signal may be observed at the 1σ and 4σ level, respectively, with five years of data taking.
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