Chemistry: electrical current producing apparatus – product – and – Having means to accommodate electrode expansion
Patent
1989-01-19
1991-07-09
Kalafut, Stephen J.
Chemistry: electrical current producing apparatus, product, and
Having means to accommodate electrode expansion
429101, H01M 400
Patent
active
050305247
ABSTRACT:
A deformable element is placed between the active plate sets of a storage battery to accommodate, by permanent compressive deformation, the swelling that occurs in the positive electrode of the plate set during extended cycling of the storage battery. The plate sets are normally supported on a core under axial compressive loading, and the swelling would otherwise deform or place a strain on the electrode connector leads, which could cause them to fail by shorting. The deformable element, preferably a modified polypropylene screen that permits the release of gas from the electrode and also is deformable in the direction perpendicular to the screen, compressively deforms to absorb the gradually increasing swelling of the positive electrode. The loading on the electrode connectors is thereby avoided or minimized, removing a major potential cause of failure.
REFERENCES:
patent: 2906805 (1959-09-01), Zahn
patent: 4477540 (1984-10-01), Miller et al.
patent: 4683178 (1987-07-01), Stadnick et al.
patent: 4820597 (1989-04-01), Lim et al.
Rogers Howard H.
Stadnick Steven J.
Denson-Low W. K.
Hughes Aircraft Company
Kalafut Stephen J.
Mitchell Steven M.
Westerlund Robert A.
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