Battery

Details Battery Battery

H - Electricity

01

M

319/48, 319/49

H01M 10/42 (2006.01) H01M 2/12 (2006.01) H01M 2/14 (2006.01) H01M 2/16 (2006.01) H01M 10/04 (2006.01) H01M 10/28 (2006.01)

Patent

CA 1310364

BATTERY Abstract of the Disclosure A battery adapted to withstand high temperatures, such as generated during heat and/or steam sterilization. The battery comprises a casing defining at least one battery cell, aqueous fluid electrolyte in the cell, a generally hydrophilic electrode assembly in the cell including cooperating positive and negative electrodes immersed in the electrolyte, and a vent in the casing for venting gases and pressure during recharging and heat-sterilizing. Hydrophobic porous material (e.g., polytetrafluoroethylene felt pad) is provided in the cell generally adjacent the electrode assembly for holding excess electrolyte. The porous material has a hydrophobicity sufficiently large relative to the electrode assembly that electrolyte in the porous material tends to migrate into the electrode assembly to wet the electrodes while excess electrolyte is stored in the porous material. The porous material may be pretreated with a surfactant to be hydrophilic so that the material wicks aqueous electrolyte, the surfactant deteriorating after the electrolyte is wicked so that the porous material has the aforesaid hydrophobicity.

602472

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