(JP10121284-A)      Method for excluding a malfunctioning elementary cell of a membrane electrolyser or a membrane electrochemical electric current generator has a number of elementary cells assembled in a filter-press arrangement, with the cells consisting of a series of bipolar plates (2), gaskets (5), electrodes (4) and membranes (6). The gaskets and/or plates incorporate distributor channels (9) for connecting the cell to longitudinal ducts for feeding reactants and withdrawing products in the electrodic compartment of each cell. Perforations (12) made on the periphery of the gaskets and/or plates of the cell containing a malfunctioning membrane provide an access to the distribution channels. A sealing means can be injected through the perforations, which upon hardening, forms occlusions in the channels and perforations respectively.    USE -   For repairing an electrochemical cell assembly which has a cell with a damaged membrane by isolating the damaged cell.    ADVANTAGE -   The repair can be carried out without the need for opening and replacing the damaged parts, but by injecting a substance to block the feed and delivery channels.    (US5876583-A)      Method for excluding a malfunctioning elementary cell of a membrane electrolyser or a membrane electrochemical electric current generator has a number of elementary cells assembled in a filter-press arrangement, with the cells consisting of a series of bipolar plates (2), gaskets (5), electrodes (4) and membranes (6). The gaskets and/or plates incorporate distributor channels (9) for connecting the cell to longitudinal ducts for feeding reactants and withdrawing products in the electrodic compartment of each cell. Perforations (12) made on the periphery of the gaskets and/or plates of the cell containing a malfunctioning membrane provide an access to the distribution channels. A sealing means can be injected through the perforations, which upon hardening, forms occlusions in the channels and perforations respectively.    USE -   For repairing an electrochemical cell assembly which has a cell with a damaged membrane by isolating the damaged cell.    ADVANTAGE -   The repair can be carried out without the need for opening and replacing the damaged parts, but by injecting a substance to block the feed and delivery channels.