Abstract: A primary electrochemical cell including a hold-down unit for securing and preventing movement of a physically large battery stack of the cell. The battery stack is disposed within a rectangular metal housing of the cell, together with an electrolytic solution, and comprises a large number of rectangular anodes and cathode structures arranged in the battery stack in alternation.The hold-down unit is disposed in the cell in abutment with the top of the battery stack and an inner surface of a cover assembly secured to the housing. The hold-down unit includes a pair of opposed end sections in abutment with the interior surfaces of one pair of walls of the housing and lying orthogonally to the planes of the components of the battery stack, and a pair of opposed connecting sections in abutment with the interior surfaces of the other pair of walls of the housing and interconnecting the pair of end sections.

Abstract: An assembly intended to be used in an electrochemical device comprises a plate and support. The plate has a bend on at least one edge, the peripheral zone of said bend being situated in the support which is obtained by molding one or more moldable materials on said zone. Thus, a face of the support adjacent the zone adjoins a face of said plate, forming a uniform junction surface, these faces being intended to be in contact with a fluid in movement in the electrochemical device, the angle .alpha. formed by this face of the plate with the extension of the corresponding face of the zone being located outside the plate.

Abstract: A unique storge cell is provided in which the active mass on the positive electrode is a mixture of crystalline and an effective amount of polycrystalline lead superoxide (PbO.sub.2). These cells are characterized, inter alia, by their remarkably lower internal resistance, higher activity, better charging and discharging characteristics, lower sulphatization, higher storage capacity and greater ability to draw larger amounts of electric current in a considerably shorter period of time as compared with conventional lead-acid storage cells. Storage devices (e.g., a battery) made from such cells also exhibit superior performance characterstics as compared with storage devices made from the conventional lead-acid cells. Batteries made from such cells will be referred to as "lead-crystal" batteries.Also, several methods are described for making the polycrystalline and crystalline lead superoxide (active mass).

Abstract: An accumulator with plate element of positive and negative electrode plates with interposed separators, lugs on the electrode plates interconnected by connecting straps, and at least one rib secured on the top surface of the plate and separator to secure the plate element to end walls. This enhances the capability of the accumulator to withstand vibration, i.e. makes it shake-resistant.

Abstract: A synthetic plastic insert is attached to the top of the plate block and bears against the cell lid.

Abstract: An improved storage battery which is composed of carbon and zinc plates having separators therebetween, the zinc plates being left untreated while the carbon plates are treated with manganese dioxide. Wherein the plates are pivotally suspended and perforated for better circulation of the electrolyte solution.

Abstract: The plates of lead storage battery cells are supported at least from the top by resilient means attached to the cell cover. They may also be supported by resilient means from the cell bottom. The respective resilient means are placed diagonally relative to each other. At least the bottom support means has variable resiliency depending on the external forces applied to the cell.