Battery having mask which electrochemically inactivates...

Details Battery having mask which electrochemically inactivates... Battery having mask which electrochemically inactivates...

H - Electricity

01

M

319/113, 319/117

H01M 2/32 (2006.01) H01M 2/22 (2006.01) H01M 6/06 (2006.01)

Patent

CA 1072629

ABSTRACT OF THE DISCLOSURE A battery has a metallic component the inner surface of which is in contact with the battery electrolyte and the outer surface of which is not in contact with the electrolyte. To prevent undesired corrosion a mask is placed over a portion of the inner surface in order to electrochemically inactivate the portion of the inner surface covered by it. Although the metallic com- ponent having the mask may be the positive electrode or a terminal, preferably it is the negative electrode and preferably the negative electrode is a metallic foil such as zinc, lead, magnesium, or aluminum or alloy thereof. The outer surface of the metallic component opposite the mask may be exposed to the air. An electrical lead may be connected to the outer surface of the metallic component opposite the mask. Where the mask is applied to the inner surface of an electrode, the mask may contain metal or a metallic compound of a chemical composition compatible with the electrode in order to compensate for the loss of electrochemical activity at the surface of the electrode covered by the mask.

284962

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