(US4463066-A)      The system has a device for drawing electrolyte in a fuel cell which is formed by a set of containers of electrolyte joined to respective fuel cells in a stack of such cells. The electrolyte is separately stored so as to provide for electrical isolation between electrolytes of the individual cells of the stack. Individual storage compartments are coupled by capillary tubes to the respective fuel cells.    Hydrostatic pressure is maintained individually for each of the cells by separately elevating each compartment of the storing means to a specific height above the corresponding fuel cell which is to be fed from that compartment of the store.    The individual compartments are filled with    electrolyte by allowing the compartments to overflow, maintaining the requisite depth of electrolyte in each of the storage compartments.    USE/ADVANTAGE -   For battery.    Reduces amount of maintenance necessary, and supplies electrolyte at correct rate for absorption.    (7pp)    (US4463067-A)      The system is for use with a fuel cell having a wicking medium for drawing electrolyte in it. It is formed by a set of containers of electrolyte joined to respective fuel cells or groups in a stack of such cells. The electrolyte is separately stored so as to provide for electrical isolation between electrolytes of the individual cells or groups of cells of the stack. Individual storage compartments are coupled by individual tubes, the ends of the respective tubes terminating on the wicking medium in each of the respective fuel cells.    The individual compartments are filled with electrolyte by allowing the compartments to overflow such as in a cascading fashion hence maintaining the requisite depth of electrolyte in each of the storage compartments. The individual compartments can also contain packed carbon fibres to provide a three stage electrolyte distribution system.    ADVANTAGE -   The electrolyte-containing compartments, trays or cups should be constructed so as to be electrically insulated from each other or made of non-conducting material such as Teflon (RTM). This enables the individual cells to be connected in a series arrangement for development of voltage and the cells to operate without danger of short or shunt current developing. (9pp)    (US4463068-A)      The system is provided with a capillary feed, preferably with cups or troughs provided at defferent elevations corresponding to the elevations of respective ones of the cells in a stack in a fuel cell power supply. A pump is provided for feeding electrolyte up into the respective troughs. A system of tubes is provided in which each tube includes a wicking element for drawing the fluid of the electrolyte by capillary action from the trough to an electrolyte matrix assembly of the respective cells.    The rate of flow of electrolyte into the cell is controlled by the wicking action of the electrolyte supporting structure in each cell. Alternatively, the cups or troughs need not be elevated but merely rely upon the capillary action of the wicking element.    ADVANTAGE -   Allows electrolyte to be supplied at which it can be absorbed by the cell, and avoids resistance loss increase. (10pp)