Electrical transmission or interconnection systems – Miscellaneous systems – Power packs
Patent
1995-11-15
1997-08-12
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Miscellaneous systems
Power packs
174 35R, 361816, 320 2, H02J 700
Patent
active
056568762
ABSTRACT:
A battery pack (4) comprises a stack of lithium solid state cells (1) and a DC/DC converter (2) in a housing (3), for use in supplying current to an electronic apparatus, e.g. a portable telephone. This provides a stable voltage for operating the electronic apparatus as the cells become progressively more discharged without having to include a DC/DC converter in the apparatus itself. The battery pack (4) can be arranged to supply current directly from the cells (1) as well as via the DC/DC converter (2), and the DC/DC converter (2) can be made voltage controllable to supply different voltages depending upon requirements. Conductive screening around the battery pack can be provided to prevent electromagnetic interference from the DC/DC converter (2).
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Patent Abstracts Of Japan, vol. 11, No. 359 (E-559), Nov. 21, 1987 for JP62 133680 "Battery Pack" by Hakuta Tatsuo.
Patent Abstracts Of Japan, vol. 11, No. 154 (E-508), May 19, 1987 for JP61 292450 "Portable Telephone Set" by Konomura Naomitsu.
Hooker Guy
Karsten Peter
Radley Stephen
Kaplan Jonathan S.
Nokia Mobile Phones Limited
Shoop Jr. William M.
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