Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1996-04-26
1997-10-21
Tso, Edward
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 46, 429 93, H01M 1044, H01M 1046
Patent
active
056800290
ABSTRACT:
Apparatus for recharging a battery, comprising a compartment which holds the battery so that its electrical terminals are in contact with a pair of electrodes. The electrodes are connectable to the poles of a controllable source of electrical energy. In the compartment a ferromagnetic body is positioned so as to be subjected to mechanical stress in response to mechanical deformation of the battery. An electrical device monitors the magnetic permeability .mu. of the ferromagnetic body by measuring the self-inductance of a coil surrounding at least a portion of the ferromagnetic body. The .mu. of the ferromagnetic body changes by magnetostrictive effects arising from mechanical stress of the ferromagnetic body in response to mechanical deformation of the battery (5) during charging. Expansion of the battery can be used as an indicator that charging has been completed, and that the battery should be disconnected from the source of electrical energy.
REFERENCES:
patent: 4371272 (1983-02-01), Iwasaki
patent: 4379816 (1983-04-01), Mullersman et al.
patent: 4689544 (1987-08-01), Standnick et al.
patent: 5260638 (1993-11-01), Hirahara
patent: 5438249 (1995-08-01), Chang et al.
patent: 5567541 (1996-10-01), Rouhani
Gillissen Eduard E. A.
Smits Wilhelmus J. M.
Somers Gerardus H. J.
Van Beek Johann R. G. C. M.
Franzblau Bernard
Tso Edward
U.S. Philips Corporation
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