UPS, railway DC power sources, auxiliary power source for power stations, chemical plants, oil refineries, steel mill, etc. Engine starting, UPS, operation and control of DC motor, water treatment plants, etc. Techfill MF-Plug type Battery Capacity MF-Plug - A Up to 300AH Techfill NiCd with recombination plug MF-Plug B 301AH and aboveĤ BATTERY RANGES AND APPLICATIONS Battery Performance Type X H M L Positive & negative electrode design Sintered Plate Pocket Plate Pocket Plate Pocket Plate Optimize discharge current to 15 minutes 15 minutes to 45 minutes 45 minutes to 1 hour 1 hour and above Applications Automatic Guided Vehicle (AGV), Engine starting, UPS application etc. The efficiency of the conversion is above 95%. The catalyst material is made of precious metal. When the gasses enter the Techfill MF-Plug, the catalyst inside the plug controls the conversion of hydrogen and oxygen to water vapor. Therefore topping-up with distilled water is no longer necessary under normal operation. TECHFILL NICD RECOMBINATION PLUG (Optional) With Techfill Maintenance-Free plug (MF-plug) installed on the battery, it will effectively recombine the hydrogen and oxygen generated during charging and forms water vapor which goes back to the battery cells.
Plates Horizontal pockets of doubleperforated steel strips for L, M, H Type and Sinter Plate for X Type.
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The grids allow free circulation of electrolyte between the plates. Separating grids Separate the plates and insulate the plate frames from each other. Plate frame Seals the place pocket and serves as a current collector. Cell cover Material: Polypropylene or MBS. Plate tabs and terminal posts are projection welded to the plate group bus. Plate group bus Connects the plate tabs with the terminal post. Flame arresting vents Material: Polypropylene.
Consequence is: Nickel-cadmium batteries can be made sealed.ģ BATTERY CELL CONSTRUCTION ( Pocket Plate ) Cell container Material: Translucent Polypropylene or MBS. Hydrogen evolution does not occur at the equilibrium potential of the cadmium electrode. Consequence is: Nickel-cadmium batteries can be stored for practically unlimited periods without refreshing charges. Plate supports and conducting elements are made of nickel. Corrosion of metallic parts is hardly observed. Electrolyte stratification does not occur, boost charging is always possible. The freezing point of the electrolyte does hardly change, so there are no problems even at very low temperatures (-40 C). This means low electrolyte resistance and suitability for extremely high current of loads. Consequences for battery practice are: Spacing between electrodes can be minimized. So, only small concentration changes occur. Only water that represents the gross of the electrolyte is consumed (or released). Potassium hydroxide (KOH) does (practically) not take part in the electrochemical reaction. The completed reaction equations are: Cd + 2 OH Cd(OH) 2 + 2e - negative electrode 2NiOOH + 2H 2 O + 2 e 2 Ni(OH) OH - positive electrode 2NiOOH + Cd + 2H 2 O 2Ni(OH) 2 + Cd(OH) 2 cell reaction When the nickel-cadmium battery was developed, the lead-acid battery was already existing, and the inventors clearly realized the advantages of nickel cadmium battery system. Diluted potassium hydroxide (KOH + H 2 O) mixed with lithium hydroxide (LiOH) with nominal density 1.20 kg/l at 20 C is used as electrolyte in nickel-cadmium batteries, so, hydrogen and oxygen evolution are also secondary reactions in nickel-cadmium batteries. During charging both reactions are reversed. The electrochemical reactions during discharge are: the oxidation of cadmium Cd Cd e at the negative electrode, the reduction of trivalent nickel to the bivalent ion Ni 3+ +e Ni 2+ at the positive electrode. 2 GENERAL AND OPERATION The fundamental inventions in the field of nickel-cadmium batteries were made around 1900 by Edison in USA and by Jungner in Sweden.
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