METHOD FOR IMPROVING THE SOLICITATION CAPACITY OF BATTERY ELECTRODES

摘要

THE INVENTION RELATES TO A PROCESS FOR IMPROVING THE STRAINING CAPACITY OF ELECTRODES OF AUXILIARY BATTERIES INCLUDING ELECTRODES STRUCTURES SHAPED FROM FIBER IN COPOLYMERISATE OF METALLIC POLYPROPYLENE OR PROPYLENE. , BEFORE IMPREGNATION WITH ACTIVE MASSES, TO AN IRREVERSIBLE COMPACTION UP TO 15 IN THE THICKNESS DIRECTION BY MEANS OF A TOOL WHICH HAS A SURFACE TEMPERATURE OF 110 TO 180C. COMPACTION IS PREFERABLY CARRIED OUT AT A TEMPERATURE OF 140 TO 165C BY COMPRESSION OR BY ROLLING, SO AS TO PRODUCE A COMPACTION OF 1 TO 5 OF THE ELECTRODE STRUCTURE; WITH THIS TREATMENT, THE INTERNAL RESISTANCE OF THE BATTERY CELLS IS REDUCED UP TO 50 AND, IN ADDITION, CELLS PROVIDED WITH ELECTRODES THUS TREATED ARE LESS SUBJECT TO INTERNAL SHORT-CIRCUITS.