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US 2004/0062387 A1Published application
Battery protection circuit
OwnerGavin Paul O'Connorinventor
Life of this patent
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Abstract
A protection circuit for a cellular telephone battery includes a first memory for storing battery identification data and a second memory associated with the telephone includes data relating to which battery type may be used by this telephone. When the battery is connected to the telephone, the battery identification data is compared to the battery type data stored in the telephone. The battery is automatically disconnected from the telephone if the two sets of data do not correspond to each other.
Claims3
A protection circuit (10) for a battery (14) which is used with a cellular telephone, the protection circuit including:
- a first memory (28) in which is stored first data which identifies the battery;
- a first controller (26) which is software driven for comparing the first data to second data which is stored in a second memory (32) associated with the telephone and which identifies a battery which is permitted to be used with the telephone;
- and a switch which is responsive to the controller (38) for connecting the battery to the telephone characterised in that:
- (a) the protection circuit (110) is encapsulated in an insulating material, is provided in combination, as an integral unit with the battery (14) and is electrically connected to the battery (14) by means of a thermal fuse (16), and in that:
- (b) the first controller (26) causes the switch to connect the battery to the telephone only if the first data corresponds to the second data.
2 more elements
Dependencies are inferred from the claim text.