초록 ▼

A porous compressible plastic material is inserted into the head space above the cells in a storage battery to attenuate the explosion of combustible gases accumulating therein. The attenuation material is distributed to create a unique bimodal por distribution, including a major proportion of small

A porous compressible plastic material is inserted into the head space above the cells in a storage battery to attenuate the explosion of combustible gases accumulating therein. The attenuation material is distributed to create a unique bimodal por distribution, including a major proportion of small pores effective in attenuation and a minor proportion of large pores effective in gas and electrolyte management. Both open cell and fibrous materials may be utilized.

대표청구항 ▼

An electric storage battery comprising a substantially closed container, electrode elements and an electrolyte disposed within said container, a head space within the container, means for venting from said container gases generated by electrochemical reactions within said container, and means for cr

An electric storage battery comprising a substantially closed container, electrode elements and an electrolyte disposed within said container, a head space within the container, means for venting from said container gases generated by electrochemical reactions within said container, and means for creating a bimodal pore distribution within said head space to attenuate pressure build-up within said container upon ignition of said generated gases, said bimodal pore distribution means including a plurality of pillows of bulked polypropylene each having at least one bonded segment, said pillows disposed within a surrounding netting, said bonded segments collectively creating a network of large pores sufficient to accommodate movement of said gases and electrolyte through said head space during operation of said battery, and the remaining portion of said pillows collectively forming a greater number of small pores effective to limit the peak pressure within said container upon said ignition.