(FR2766624-A1)      A bipolar cell for a gas depolarised rechargeable battery, comprises (a) an electrically conductive bipolar plate having a base and an upwardly and outwardly tapered peripheral wall; (b) a hydrophobic insulating coating composed of a chlorofluoro-olefin polymer bonded to the interior and exterior surfaces of the peripheral wall; (c) a condensed phase electrode proximate the base; (d) a gas electrode including a condensed current collector for a gaseous active material; and (e) a dielectric separator between the condensed phase electrode and the gate electrode. The insulating coating is oriented to enable gas passage from the cell past an adjoining cell to a bulk gas storage region within the battery. Also claimed are (i) a bipolar rechargeable battery and (ii) a process for producing an improved bipolar plate for a gas depolarised rechargeable battery.    USE -   Used in gas depolarised rechargeable batteries.    ADVANTAGE -   A hydrophobic insulation coating is provided which has excellent affinity and retention properties for the metallic cell cups or dishes used in a bipolar battery. The coating adheres to the metallic dish even after extended periods of exposure to the highly alkaline electrolyte and the severe electrochemical and thermal environment typical of that inside a spacecraft battery, without the need for a primer coating or perforations.    (JP11102723-A)      A bipolar cell for a gas depolarised rechargeable battery, comprises (a) an electrically conductive bipolar plate having a base and an upwardly and outwardly tapered peripheral wall; (b) a hydrophobic insulating coating composed of a chlorofluoro-olefin polymer bonded to the interior and exterior surfaces of the peripheral wall; (c) a condensed phase electrode proximate the base; (d) a gas electrode including a condensed current collector for a gaseous active material; and (e) a dielectric separator between the condensed phase electrode and the gate electrode. The insulating coating is oriented to enable gas passage from the cell past an adjoining cell to a bulk gas storage region within the battery. Also claimed are (i) a bipolar rechargeable battery and (ii) a process for producing an improved bipolar plate for a gas depolarised rechargeable battery.    USE -   Used in gas depolarised rechargeable batteries.    ADVANTAGE -   A hydrophobic insulation coating is provided which has excellent affinity and retention properties for the metallic cell cups or dishes used in a bipolar battery. The coating adheres to the metallic dish even after extended periods of exposure to the highly alkaline electrolyte and the severe electrochemical and thermal environment typical of that inside a spacecraft battery, without the need for a primer coating or perforations.