Abstract: A gastight nickel/metal hydride cell for the storage of electrochemical energy, having at least one positive nickel oxide electrode and at least one hydrogen-storing negative electrode, a hydrophilic separator being arranged between the positive and negative electrodes, and an alkaline electrolyte or an alkaline electrolyte mixture, in that one or more negative electrodes are provided with a gas-permeable, hydrophobic transport element for transporting the gases of the cell atmosphere.

Abstract: An electrode and a method of manufacturing an electrode with a capacity to store hydrogen, has a metallic substrate material to which an active compound is applied. The active compound is obtainable from a paste which comprises a dry fraction and a liquid fraction. The dry fraction comprises a mixture of a pulverulent storage alloy for hydrogen, soot and polytetrafluoroethylene (PTFE), the particles of the storage alloy being covered with PTFE in the manner of fibrils; and the liquid fraction comprising a mixture of water and a higher alcohol which has from 3 to 6 C atoms.

Abstract: The invention relates to a battery of bipolar stack design, having a plurality of subcells. The battery, the subcells of which comprise in each case two electrodes of different polarity and an electrolyte-impregnated separator, are electronically connected via an electrically conductive connecting wall between them. All the subcells are connected to a common gas space. The connecting walls between the subcells produce the electrical contact and, at the same time, exclude any electrolytic connection. The electrolyte is fixed in a limited quantity in the electrodes and the separator. The subcells are pressed together by a continuously acting force. The current is discharged on the outer walls of the casing, which are designed as pressure plates.

Abstract: A fibrous-structure electrode plate has a metal thickness which increases continuously towards the current discharge lug and the resultant low-loss current carrying. To produce the fibrous-structure electrode framework plates according to the invention, textile substrate can be reinforced by electrodeposition. For the subsequent use of the textile substrate which has been reinforced by electrodeposition as an electrode framework of fibrous structure, a diaphragm system is introduced into the electrodeposition bath between each anode and the premetallized web of a textile substrate which is to be reinforced by electrodeposition. In this way, it is possible to distribute the metal applied to the substrate, specifically without previously cutting the web to size.

Abstract: The invention provides a treatment for edge surfaces and faces of metallized fiber structure framework plates for use in electric accumulators. The edge surfaces and faces, except for the starting portion of the current tapping tab, are mechanically, thermally or chemically freed of projecting metallized fiber ends and fiber bundles in order to avoid short circuits or soft shorts caused by dendrites penetrating the cell separator or by metallized fiber ends. The mechanical, thermal or chemical treatments can take place individually or in combination with one another.

Abstract: The invention provides a treatment for edge surfaces and faces of metallized fiber structure framework plates for use in electric accumulators. The edge surfaces and faces, except for the starting portion of the current tapping tab, are mechanically, thermally or chemically freed of projecting metallized fiber ends and fiber bundles in order to avoid short circuits or soft shorts caused by dendrites penetrating the cell separator or by metallized fiber ends. The mechanical, thermal or chemical treatments can take place individually or in combination with one another.

Abstract: The invention relates to a process for the continuous chemical metallizing of porous substrates in a wet-chemical manner. According to the invention, the different reaction rates of the adsorption or ionic reduction reaction, in the case of activating with Pd/Sn, are adapted to the chemical metallizing reaction used. The removal of the spent process solutions from the pores of the substrate takes place by suction. The invention permits a continuous implementation of the process of depositing a metal layer on an electrically non-conductive, synthetic substrate, which can be used at the start of a galvanic reinforcing process of the chemically deposited metal coating.

Abstract: A film sensor element is used to determine the mass of a flowing fluid, in particular an air mass flow in the intake tube of an internal combustion engine. Such a sensor is part of a measurement bridge and operates on the hot-wire anemometer principle, designed as a constant-resistance regulator connected to an operational amplifier. To reduce the response time, two separate resistance tracks of a film sensor element are structured in such a way that they are situated perpendicular to the direction of flow (S) with one track (6) along the leading edge and the other track (7) along the trailing edge. The tracks (6, 7) are electrically connected in parallel, such that the current can be divided according to the two resistance values as a current divider.

Abstract: A gas-tight maintenance-free cell or battery comprises positive nickel oxide electrodes having a fibrous structure, gas-impermeable separators, a fixed alkaline electrolyte, negative metal electrodes having a fibrous structure and a higher charging and discharging capacity than in the case of the positive electrodes, and electroconductive gas diffusion compartments. The cell operating according to the oxygen cycle. The metallized fibrous-structure electrode frameworks of the negative electrodes are filled with the active material only in certain zones. Those zones of the fibrous-structure electrode frameworks of the negative electrode which are not filled with the active material, serve as gas diffusion zones, integrated into the frameworks, for the oxygen to be discharged at the negative electrode.

Abstract: An electronic ignition system for an internal combustion engine is so controlled that an ignition current or secondary current caused by an ignition spark at the respective spark plug in the secondary coil of an ignition transformer is evaluated for initiating, if necessary, follow-up charges of the primary coil to thereby generate further ignition impulses. The initial loading or charging impulse is provided by a respective control circuit. The total sparking time at the respective spark plug thus corresponds to a sequence of individual impulses, each of which causes an ignition spark. The detection of the ignition current in the secondary coils is performed with an ignition current measuring circuit arrangement connected to the secondary coils. This measuring circuit (SC) generates a signal representing the secondary or ignition current represented as a voltage drop across a measuring resistor (R.sub.2).

Abstract: For determining the air mass flow in the intake pipe of an internal combustion engine by means of an electrical bridge, normally the current flowing through the current measurement resistor when balancing the bridge is evaluated as an indirect measure of the air mass flow. The primary measured quantity for the air mass flow is, however, the power converted at the air flow measurement resistor around which the air flows so that the indirect measurement always includes an error. To reduce this measurement error, the invention utilizes the evaluation of the sum of the voltage across the current measurement resistor and the voltage or a partial-voltage across the air flow measurement resistor as a measure of the air flow.

Abstract: For detecting the angle of rotation of a shaft, in particular of a gear shift shaft in a gear change box for a motor vehicle, a device is proposed in which a carrier arrangement carries a magnet and in its proximity magnetically sensitive sensors. A screening device, rigidly attached to the shaft, moves in the intermediate space between the magnet and the sensors. This screening device is made from a ferromagnetic material such that the magnetic field permeating the sensors is influenced in a manner whereby the sensors generate a signal that unambiguously identifies the position of the shaft.

Abstract: A chemical metallization process is used for electrically non-conducting porous substrates, in needle felts, nonwovens or open-pored foams which possesses a porosity of from 40 to 97%. The metallization follows activation of the fiber surfaces or of the surfaces of the pore walls with a noble metal-containing solution. The volume of the chemical metallizing solution used is reduced to produce a considerable reduction in the operating costs, not only in respect of the solution itself but also in respect of the disposal of the waste water from the chemical metallization. Since less waste water is produced from the start in the chemical metallization process, a considerable contribution to the protection of the environment results.

Abstract: A battery current tapping vane is welded to a connecting strap at its one end region. The vane has weld burls and is bent over transversely to the flat side of the remaining current tapping vane. To improve the welding process and to reduce waste, the weld burls are produced in full bodied version at least in the bent end region which is provided on both sides with recesses or reduced thickness portions. The depth of the recesses or portion is greater than the amount of settlement in the course of welding on. The weld burls are alternatively formed by material archings with sides projecting transversely from the bent end region of the current tapping vane and merge into the current tapping vane, with a radius of curvature corresponding to no greater than twice the wall thickness of the current tapping vane.

Abstract: The invention relates to a battery box having a plurality of orientation-independent electrochemical cells. Within the battery box, the cells are arranged horizontally, cells which are located one above the other being combined to form a cell group having flow channels arranged between adjacent cells. The flow channels of a cell group are connected via a transverse inlet flow channel to a distributor channel and via a transverse outlet flow channel to a collecting channel, the collecting channel being arranged with respect to the battery box on the side opposite the distributor channel.

Abstract: A method for controlling an ignition system for internal combustion engines where the sparking current together with the sparking period can be set to a particular value. The method described here makes it possible for each cylinder in the engine to be supplied with just the amount of ignition energy to meet the momentary requirement of the engine, and consequently a spark plug replacement interval of more than 100,000 km can be achieved. In accordance with the present invention, both the value of the sparking current and the value of its sparking period are controlled independently according to certain engine parameters, in particular load, engine speed and temperature. The method in accordance with the present invention can be applied preferably in an alternating current or high voltage capacitor ignition system.

Abstract: An electrochemical storage device having a metallic, gas-tight storage device housing in which an electrode stack formed from a plurality of electrode plates stacked on one another is accommodated. Arranged between the storage device housing and the electrode stack is a box-like stack insulation which is made from an electrically insulating material and which surrounds the electrode stack on the sides which come to bear directly against the housing interior. For the purpose of reliable flow of the quantity of gas occurring during operation, there are arranged on those circumferential sides of the stack insulation towards which the narrow sides of the electrode plates point material protuberances which cross over the narrow sides of the electrode plates and which are spaced apart from one another in order to form gas conduits.

Abstract: In an alternating current ignition system whose ignition output stage has an ignition coil, a resonant-circuit capacitor for generating a bipolar alternating current, a semiconductor switch for controlling the primary coil current and an energy recovery diode connected in parallel to the semiconductor switch, the current flowing through the diode serves as control signal for the semiconductor switch and triggers the switching-on of the semiconductor switch.

Abstract: A wet-chemical metallization process is used for electrically non-conductive, previously chemically activated plastic substrate sheets. After metallization, the metallizing solution is separated from the substrate sheet by the influence of gravity or centrifugal force, and the sheet is rinsed with rinsing water. The metallizing solution and the rinsing water are each collected separately and subjected to a treatment for the purpose of reuse. To this end, the metallizing solution is distilled and reused as rinsing water. The rinsing water is worked up into a reusable metallizing solution by the addition of chemical metallizing components, thereby saving costs for make-up water (i.e. distilled water) and reducing pollution of the environment by contaminated effluents.

Abstract: An aqueous cadmium oxide paste of high flowability for the vibration filling of foam-structure and fiber-structure electrode plaques is characterized by a cadmium oxide content of about 25 to 35% by volume, a pH of about 10 to 12.5, a content of about 0.5 to 2.5% by weight, based on cadmium oxide, of one or more dispersants from the group comprising the water-soluble salts of polyphosphoric acids, di- and polyphosphonic acids and their derivatives, gluconic acid or of antimonyl tartrate. The paste has a plastic viscosity of about 0.1 to 1 Pa.s and also a yield value of between about 10 and 120 Pa. This cadmium oxide paste makes it possible to fill foam-structure and fiber-structure electrode plaques completely in one operation.