Abstract: Negative cadmium electrode for a non-sealed alkaline storage battery comprising a metal support to which is bonded an active paste containing a cadmium-based active material and a binder. The active paste additionally includes a material that acts as a hydrogen releasing catalyst, in a proportion of 0.2 percent to 25 percent by weight of the paste.

Abstract: An assembly of accumulator cells juxtaposed to form a unit comprises a peripheral binding and holding system. The peripheral binding is an insulative material strap having an insulative material buckle. The insulative material(s) are resistant to the accumulator electrolyte. The strap is fastened by the buckle and is immobilized vertically against the side walls of the unit. The holding system comprises a rigid flat support made from an electrolyte resistant material disposed beneath the cells and extending longitudinally thereof. To this are attached at least two carrying straps each disposed between two cells and defining a respective handle above the cells.

Abstract: A vented nickel-cadmium storage cell with reduced water consumption has its inter-electrode gap occupied by a separator comprising at least one polymer fiber felt and a perforated polyolefin film.

Abstract: An activatable electrochemical battery implementing lithium/oxyhalide couples.The present invention relates to an activatable lithium/SOCl.sub.2 or lithium/SO.sub.2 Cl.sub.2 primary battery in which means are provided for eliminating leakage currents and means are provided for controlling the temperature rise during discharge.Thus, each electrochemical element is enclosed, in a sealed insulating housing constituted by a bottom, a cover, and a spacer constituting its side wall. The terminals of the elements are plates of nickel enabling heat to be dissipated into a heat-conducting resin.

Abstract: A battery in accordance with the invention comprises: p1 an electrochemical block (3) constituted by a large number of electrochemical couples; p1 a network for irrigating said electrochemical couples with electrolyte; p1 a heat exchanger (7) for externally dumping the heat evolved during discharge; p1 a pump (5) for causing the electrolyte (10) to circulate through the irrigation network and said heat exchanger; and p1 a device (2) for storing electrolyte and transferring it to said electrochemical block (3) on activation, said device including a supply of electrolyte connected to a gas generator and also to an inlet to said pump.

Abstract: The invention relates to polymer-consolidated electrodes for alkaline storage cells. These electrodes are cut out from a support which is coated with a plastified active material. In accordance with the invention, the edges (2, 3) of the electrodes (1) as cut out in this way are reinforced by a layer of polyolefin (5), e.g. paraffin.

Abstract: A method of manufacturing an electrochemical cell having an alkaline electrolyte and spiral-wound electrodes, the method consisting in superposing four items: a positive electrode (2), a separator (4), a negative electrode (3), and another separator (5), with the two separators optionally being two lengths of a common separator; in winding these four items around a core (13) in order to obtain a roll (10); and in inserting said roll in the can (11) of the cell. The method includes the improvement whereby, at the end of the winding operation, the end of one of the elements is fixed on the preceding turn of the same element by means of a hot melt glue which is not soluble in said alkaline electrolyte.

Abstract: A small quantity of bromine (0.1 to 1 m/liter of electrolyte) is added to the electrolyte of an activatable Li/SO.sub.2 Cl.sub.2 battery. This small amount of bromine acts as a catalyst, not as a depolarizer. Considerable improvement is thus obtained in the electrical performance of the battery.

Abstract: In an activatable AgO/Al battery, the electrolyte tank is partitioned into two portions (31, 32) which are simultaneously filled on activation. During a first discharge stage electrolyte in one of said portions (31) is used and is then removed from the battery. During the second discharge stage, the battery operates using concentrated electrolyte to be found in the second portion (32) of the tank.

Abstract: An activatable battery including a heat exchanger, the battery comprising a Volta pile enclosed in an insulating envelope, with each cell of the pile comprising a porous cathode, a separator, a lithium anode, and a metal collector, and the heat exchanger being constituted by a circuit for forced circulation of the electrolyte, said circuit comprising:electrolyte injection manifolds (25) and electrolyte collector manifolds (26), both having openings to the outside of said insulating envelope;means for transferring electrolyte from the injection manifolds to the collector manifolds through each cell, said means including channels (121, 126) formed through at least one electrode of each cell; anda pump (22) for causing the electrolyte to circulate from the injection manifolds to the collector manifolds.

Abstract: The electrode structure includes electrolyte injection and collector channels, and, on pairs of opposite sides of each battery cell (1), plates (2) for distributing electrolyte through said cells, said plates being disposed to ensure that the flow of electrolyte through each cell is substantially constant over any point of the area of said cell.

Abstract: The present invention concerns an electrochemical generator with a lithium anode and liquid cathode and, notably, generators using the Li/SO.sub.2, Li/SOCl.sub.2 and Li/SO.sub.2 Cl.sub.2 couples. This generator comprises of stack of flat elements threaded onto rods, one end of each rod being attached to the cover of a case. The anodes are threaded by flexible lugs which act as current collectors and fuses.

Abstract: A battery which is activatable by seawater and which uses electrochemical AgO/Al couples includes means (200, 12) for eliminating the aluminates which form in the electrolyte during discharge, and for regenerating the electrolyte.

Abstract: A cell operable at temperatures between 100.degree. C. and 200.degree. C. includes a non-aqueous electrolyte which comprises at least one solvent belonging to the class of aromatic or aliphatic linear sulfones. The negative active material of the cell may be lithium, for example, and its positive active material is selected from the group constituted by oxides, oxisalts, and sulfides. The electrolyte includes as a solvent, in particular, dimethylsulfone alone or mixed with other aromatic or aliphatic linear sulfones.

Abstract: A method of manufacturing a polymer-consolidated cadmium electrode for an alkaline storage cell, the method comprising the steps of:mixing the following ingredients in water: a gelling agent; cadmium and cadmium oxide in powder form constituting the active material; and a copolymer of carboxylated styrene-butadiene at a concentration lying in the range 0.5% to 3% by weight of active material;coating the resulting paste on a metal current collector;drying the coated current collector; andsubjecting the resulting assembly to a temperature lying in the range 120.degree. C. to 150.degree. C. for a period of a few minutes in order to cause said polymer to cross-link.

Abstract: The electrochemical cell has an alkaline metal or alkaline earth metal negative active material, such as lithium, and an electrolyte comprising a solute and at least one solvent selected from the liquid oxyhalides group, which also serves as the positive active material. In accordance with the invention the electrolyte further contains an organic compound which has the effect of significantly reducing voltage delay.

Abstract: A high specific energy electrochemical cell comprises: a negative active material (4) based on an alkali metal or on an alkaline-earth metal; a separator (8); a non-aqueous liquid electrolyte; and a positive electrode comprising a solid active mass (5). The positive mass is provided, on its electrolyte side, with a porous and electron conductive metal covering (12) which does not participate in the electrochemical reaction, whose thickness is of the order of a few microns, and which is in contact with the metal portions serving as a positive current collector. The covering greatly reduces the initial impedance of the cell.

Abstract: Positive active material (2) for electrochemical cells, characterized by the fact that it is constituted by an anhydrous borate having the formula Bi.sub.4 B.sub.2 O.sub.9. The invention is applicable to cells using lithium as the negative active material and the electrolyte may be solid or liquid.