Deutsche Automobilgesellschaft Mbh

Daug-hoppecke Gesellschaft Fur Batteriesysteme Mbh

Daimler Chrysler Ag

Mercedes-benz Aktiengesellschaft

Daug-hoppecke Gesellschaft Fuer Batteriesysteme Mbh

Daug-hoppecke Gesellschaft Fuer Batteriesystems Mbh

Daug-hoppecke Gesellschaft Fuer Batteiesysteme Mbh

Duetsche Automobilgesellschaft Mbh

Deutsch Automobilgesellschaft

Otwin Imhof

Holger Kistrup

Claus Schneider

Uwe Schaffrath

Karl-Ernst Noreikat

Dieter Henke

Wilhelm Kitzhofer

Wilhelm Kitzh&ouml;fer

Friedrich Haschka

Willi Kitzhofer

Wilhelm Kitzhoefer

Willi Kitzhoefer

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.

Fibrous-structure electrode framework web strip, electrode plates produced therefrom and process for producing a fibrous-structure electrode framework web strip

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.

Metallized fiber structure framework having treated edge surfaces and faces for use as an electrode or recombination element in accumulators

A process for the removal of galvanic electrolytic residues from galvanically reinforced fiber structure frames, where the fiber structure frame is produced through chemical metallization of a textile substrate based on fleeces or felts made of synthetic fibers and then through galvanic reinforcement of the metallized textile substrate in a galvanic bath containing a galvanic electrolyte. The invention provides that the galvanic electrolytic residues are removed by suction from the fiber structure frame. The fiber structure frame then makes contact at least once under high pressure with the wash liquid in a wash station, and subsequently the wash liquid is removed by suction from the fiber structure frame. In order to remove by suction, the galvanic electrolytic residues or the wash liquid, a belt-shaped porous supporting device is inserted between the suction port and a main area of the fiber structure frame.

Process for the removal of galvanic electrolytic residues from electrode frames or electrode frame webs with fiber structure

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.

Continuous process for metallizing porous synthetic substrates employing

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.

Gas-tight maintenance-free cell or battery

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.

Chemical metallization of electrically non-conducting porous substrates

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.

Current tapping vane and method for producing same

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.

Wet-chemical metallization process

An electrochemical storage device which has electrode plates of different polarity which are alternately stacked on one another to form an electrode stack. Each of the electrode plates is formed from an electrode framework with a current-collecting lug arranged thereon. Identically polarized current-collecting lugs of an electrode stack are connected in an electrically conductive fashion to a terminal yoke. In order to ensure better welding, the terminal yoke has at the location of the current-collecting lugs a transverse slot into which the free end region of a current-collecting lug projects. The current-collecting lug is attached to the terminal yoke on the flat side that is remote from the electrode stack.

Electrochemical storage device and method for producing same

An electrochemical storage device and a process for making the same has electrode plates of differing polarity which are stacked one upon the other. Each one of the electrode plates exhibits a metallized electrode structure and a current tapping vane which is resistant to bending and which is electrically conductively secured to a welding margin of the electrode structure. The same-polarity current tapping vanes of the electrode plates are electrically connected to a connecting strap extending parallel to the electrode plate stack and within the storage device housing. In order that, inter alia, the service life of the electrochemical storage device should be increased, the current tapping vanes disposed at the electrode structures are permanently shaped in accordance with their installation position essentially only outside the welding margin, in such a manner that in the installed condition they are free from mechanical stresses in the region of the welding margin onto the electrode structure.

Electrochemical storage device

An electrode plate is formed from a porous electrode framework with welded-on current discharge lug for use in electrochemical storage cells. The electrode framework is formed from metallized plastic and has a current discharge lug welded on in a unilateral and overlapping manner on the weld-on edge of the electrode framework. The material thickness of the current discharge lug decreases in the weld-on end towards the weld-on edge. The material of the electrode framework assigned to the weld-on end of the current discharge lug is compressed in the region of the overlap. For greater stability of the welding, the weld-on end of the current discharge lug is formed by teeth spaced apart from one another by teeth interspaces. The teeth interspaces are at least wide enough that, when there is pressing during the welding on of the current discharge lug, the material of the electrode framework can swell between the teeth.

Porous electrode framework plate with welded-on current discharge lug

An electrode matrix with hollow or fibrous structure made of metallized and, optionally, subsequently removed plastic fibers, and a current-collector lug welded-on on one side for electrochemical storage cells. The current-collector lug overlaps the electrode matrix at the periphery on one side, the latter being compressed in the vicinity of the overlap in such a way that the current-collector lug remains within the nominal thickness of the electrode matrix. The current-collector lug has, in the overlap region, a plurality of material projections which project in the direction of the electrode matrix, whose diameters correspond at least approximately to the material thickness of the current-collector lug and which are pressed into the electrode matrix, each material projection pressed into the electrode matrix still remaining, however, completely inside the electrode matrix even at the point of its highest elevation. Each material projection is formed as a collar of a plurality of projecting material tabs which are twisted out of their projecting position and are keyed into the compressed electrode matrix.

Electrode matrix having hollow or fibrous structure and welded-on

A method and apparatus for filling fibrous-structure electrode plaques for rechargeable batteries with an active compound paste, with simultaneous sizing of the plaque. The fibrous-structure electrode plaque is fed by means of a conveyor device to a roll mill whose roll nip is uniformly filled with a flowable active compound paste over the nip width. As the plaque passes through the roll nip, it is filled with active compound paste from both sides, simultaneously sized for thickness, its surface is smoothed and excess paste is removed from the main surface.

Method of simultaneously sizing and filling fibrous-structure electrode

A process treats the waste water which accumulates as used activation solution in the one-step activation, on the basis of acidic palladium/tin solutions, of large-surface plastic substrates, in particular of non-woven fabric, needled felt or open-pored foam sheets, for the purpose of a subsequent chemical metallization. A concentrate composed of palladium chloride and sodium chloride and then a solid tin salt in a molar ratio of 1:1.5 to 1:4, based on the palladium, is added to the waste water. After a certain maturing time, a ready-to-use activation solution is again obtained for activating a plastic substrate and reduces the amount of the waste water hitherto accumulating after the activation has taken place.

Growing community of inventors

Nurtingen, Germany

Otwin Imhof