Abstract: A cap (10) for accumulators suited for the automatic refill of distilled water includes a main body (20) inside which there is a chamber (13) suited for the distribution of the distilled water through a hole (14). The hole is shut by a valve (32) controlled by a float (30) and connected to the float by means of a toggle joint. The toggle joint consists of a right-angled lever (35) and of a shaft (34) connected by a hinge to the lever and to the valve. The toggle joint ensures a very high force for the shutting of the valve, such as to stand high deliveries of liquid even under pressure. The cap is also equipped with a float (30) in the shape of an upside-down glass, that is, open at the bottom on the side of the liquid upper surface, so that the push on the float is determined by the over-pressure of the air and the gasses contained in the interior of the float. The overpressure increases in direct relation to the rising of the electrolyte level.

Abstract: An automatic battery watering device includes a housing mounted in the battery cell opening. The housing has a chamber for receiving pressurized water, an internal valve opening for passing the water into the cell, a valve pin mounted in the valve opening, a float that is mounted in the battery electrolyte and connected to the lower end of the pin so as to rise and fall in response to a change in the liquid level in the cell, and a pair of internally mounted diaphragms which center and support the pin and float. The pin has a valve member for blocking the internal valve opening when the float is at an appropriate level. When the float is lowered after a drop in the level of the electrolyte, the internal valve member opens so water can flow into the battery to replenish the liquid level. The housing passes gas from the battery to the atmosphere along a path independent of the water passage.

Abstract: Plug for cells of electrical storage batteries comprising a cylindrical body (4), fastened to the vent stack (2) of the cover, capable of being connected by two pipes (7) to the immediately preceding and to the immediately following plug, and provided with two parallel cylindrical cavities (14 and 16): one central cavity (14), in the interior of which a toothed hollow stem (10) of a float (11) slides; and one lateral cavity (16), in the interior of which a smaller rod (17), which is also toothed, slides, on which a heavy metal sphere (18) rests. The stem (10) and the rod (17) are constrained to the two arms of a rocker lever (23) hinged on a pin (22) in the lower hollow portion (20) of the body (4). When the float (11) and its hollow stem (10) move upwardly, the rod (17) and the sphere (18) move downwardly. When the electrolyte is at its right level, the sphere (18) rests on a ring (19) and closes the access of filling-up water to the cavity (16) housing the rod (17) .

Abstract: An improved battery stack design for an electrochemical system having at least one cell from which a gas is generated and an electrolyte in communication with the cell is described. The improved battery stack design features means for defining a substantially closed compartment for containing the battery cells and at least a portion of the electrolyte for the system, and means in association with the compartment means for selectively venting gas from the interior of the compartment means in response to the level of the electrolyte within the compartment means. The venting means includes a relief valve having a float member which is actuated in response to the level of the electrolyte within the compartment means. This float member is adapted to close the relief valve when the level of the electrolyte is above a predetermined level and open the relief valve when the level of electrolyte is below this predetermined level.

Abstract: A metal halogen battery construction, with the improved combination comprising, at least one cell having a positive electrode and a negative electrode for contact with aqueous electrolyte containing the material of said metal and halogen, sump means wherein the electrolyte is collected, store means wherein halogen hydrate is formed and stored as part of an aqueous material, circulation means for transmitting electrolyte through the battery, conduit means for transmitting halogen gas formed in the cell to hydrate forming means associated with the store means, fluid jet pump means operative to cause circulation of gases from the sump including hydrogen and halogen to contact a reactor means whereby hydrogen and halogen are combined and returned to the sump, and valve means sensitive to gas pressure in the sump means whereby when sump pressure drops below a desired setting of said valve means, the valve opens and permits halogen gas from the store to be transmitted to the electrolyte circulation means.

Abstract: A metal halogen battery construction containing a novel reactor means having at least two reaction zones with a reaction initiator device in each zone, whereby the reactor permits controlled recombination of hydrogen gas and halogen gas in the system to form hydrogen halide, which is then dispersed into the aqueous electrolyte of the battery.

Abstract: A watering device (10) for maintaining a predetermined electrolyte level in the cells of a battery. The device includes a plug body (72) consisting of a cover (12), a valve housing (14) and a float guide (16). A valve (22) is disposed within the body (72) to modulate the quantity of water entering each cell. A float (18) movably communicates with the valve (22). A visual indicator (28) indicates the status of the device (10).

Abstract: An improvement in a water-filling system for batteries, which protects battery cells from damage caused by hydrogen explosions occurring at other cells, is a check or stop valve, placed in the fluid communication lines between two cells, which allows passage of water, but blocks passage of an explosive shock wave.

Abstract: A sodium-sulfur battery including sodium and sulfur separated by a beta-alumina tube is disclosed herein along with a method of operating the battery utilizing a sodium storage and dispensing arrangement. This storage and dispensing arrangement includes a housing containing a supply of sodium out of contact with the beta-alumina tube and a thermally responsive bimetallic valve for passing sodium from its supply housing into contact with the beta-alumina separating tube when the sodium is in a liquid state and so long as the average temperature along at least a predetermined section of the tube remains below a predetermined value. In the event that this average temperature reaches the predetermined value, the bimetallic valve automatically prevents passage of liquid sodium from its supply housing to the beta-alumina tube.

Abstract: This invention is an attachment for a standard storage battery attachment providing a liquid reservoir which is in communication with the individual cells of the battery for automatically maintaining a predetermined electrolytic level within the individual cells while simultaneously allowing gas buildup to be released. A valve is located between each cell and the reservoir, which valve opens and closes in response to the electrolytic level within the cell to automatically maintain the electrolyte at a predetermined level. The attachment is provided with a cover having one or more openings for adding liquid to the reservoir.

Abstract: A wet cell storage type battery which may be quickly restored to a fully charged condition by the removal and replacement of its electrical generating elements or slowly recharged in the normal manner.

Abstract: An electrochemical cell exhibiting high specific power and specific energy n combination which comprises an aluminum-lithium alloy anode with an aqueous electrolyte. The electrolyte may be the readily available seawater circulated through the cell at a predetermined flowrate to obtain maximum controlled electrical energy output.