Over voltage transient controller
First Claim
1. An apparatus comprising:
- a first switch coupled to a battery pack in series; and
an over voltage transient controller coupled to said first switch and operable for comparing a monitoring signal to an adjustable reference signal, and for generating a control signal when said monitoring signal is greater than said adjustable reference signal,wherein said monitoring signal is indicative of a difference between a raw voltage level of said battery pack and an average voltage level of said battery pack,wherein said adjustable reference signal is adjusted based on said average battery level, andwherein said first switch responds to said control signal to protect said battery pack from an over voltage transient condition.
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Abstract
An over voltage transient controller to protect a rechargeable battery from an over voltage transient condition. The over voltage transient controller may comprise a comparator to compare a first signal with a second signal representative of a reference voltage level and to provide an output signal representative of an over voltage transient condition to a switch if the first signal is greater than or equal to the second signal. The switch is responsive to the output signal to protect the rechargeable battery from the over voltage transient condition. The over voltage transient controller may further comprise a DAC, wherein the second signal is based, at least in part, on an output of the DAC. An apparatus comprising a charge switch and such an over voltage transient controller is also provided.
42 Citations
7 Claims
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1. An apparatus comprising:
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a first switch coupled to a battery pack in series; and an over voltage transient controller coupled to said first switch and operable for comparing a monitoring signal to an adjustable reference signal, and for generating a control signal when said monitoring signal is greater than said adjustable reference signal, wherein said monitoring signal is indicative of a difference between a raw voltage level of said battery pack and an average voltage level of said battery pack, wherein said adjustable reference signal is adjusted based on said average battery level, and wherein said first switch responds to said control signal to protect said battery pack from an over voltage transient condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification