Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1997-01-15
1998-03-24
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 39, 320 49, H01M 1046, H01M 1050
Patent
active
057316864
ABSTRACT:
A method and apparatus is provided for miniaturizing battery overtemperature protection and voltage regulation circuits in which such protection and regulation circuits are formed in an integrated circuit (200, 600) and embedded in the casings of individual batteries. In one aspect of the invention, a MOSFET switch (Q1), a temperature sensitive diode (D1) and a control circuit (604) may be formed in an integrated circuit (600) and embedded in the casing of a battery. The MOSFET switch may be placed in the charging path of the battery to provide an open circuit when the battery temperature exceeds a predetermined value. In another aspect of the invention, the operation of the MOSFET switch (Q1) may be controlled by a control circuit (204) to provide a constant output voltage from the battery, thereby improving the operation of the portable system using the battery.
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Brady III W. James
Donaldson Richard L.
Law Patrick B.
Texas Instruments Incorporated
Wong Peter S.
LandOfFree
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