| US 7,498,766 B2 | ||
| System and method for authenticating a battery | ||
| Christopher R. Paul, Bayport, N.Y. (US); and Joseph Cabana, Centereach, N.Y. (US) | ||
| Assigned to Symbol Technologies, Inc., Holtsville, N.Y. (US) | ||
| Filed on May 30, 2006, as Appl. No. 11/442,942. | ||
| Prior Publication US 2007/0278992 A1, Dec. 06, 2007 | ||
| Int. Cl. H02J 7/00 (2006.01) | ||
| U.S. Cl. 320—106 [320/137] | 15 Claims |
| 1. A system, comprising:
a battery including a first encryption engine storing a first key; and
a battery charger including a microcontroller and a second encryption engine storing a second key,
wherein, when the microcontroller detects a coupling of the battery to the charger, the microcontroller issues a challenge
to the first encryption engine and the second encryption engine,
wherein the first encryption engine generates a first response as a function of the challenge, the first key and a predefined
algorithm, and the second encryption engine generates a second response as a function of the challenge, the second key and
the predefined algorithm, and wherein the microcontroller compares the first and second responses to authenticate the battery,
and
wherein, when the first and second responses are different, the microcontroller continues the power supplied to the battery
at a predetermined charge rate which is selected so that the battery never becomes fully charged.
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