CIRCUITRY FOR BALANCING CHARGING OF SERIES CONNECTED BATTERY CELLS
First Claim
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1. A circuit for preventing overcharging a battery cell comprising:
- a voltage detector for monitoring a voltage across a battery cell, the voltage detector configured to determine when the voltage across the battery cell is greater than a first threshold voltage; and
an electronic switch responsive to the voltage detector and configured to shunt current around the battery cell when the voltage detector has determined the battery cell voltage is greater than the first threshold voltage.
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Abstract
A circuit for preventing overcharging a battery cell is disclosed. The circuit comprises a voltage detector for monitoring a voltage across a battery cell. The voltage detector is configured to determine when the voltage across the battery cell is greater than a first threshold voltage. The circuit further comprises an electronic switch responsive to the voltage detector and is configured to shunt current around the battery cell when the voltage detector has determined the battery cell voltage is greater than the first threshold voltage.
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Citations
19 Claims
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1. A circuit for preventing overcharging a battery cell comprising:
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a voltage detector for monitoring a voltage across a battery cell, the voltage detector configured to determine when the voltage across the battery cell is greater than a first threshold voltage; and an electronic switch responsive to the voltage detector and configured to shunt current around the battery cell when the voltage detector has determined the battery cell voltage is greater than the first threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A circuit for preventing overcharging a battery cell comprising:
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a voltage detector for monitoring a voltage across a battery cell, the voltage detector configured to determine when the voltage across the battery cell is greater than a first threshold voltage and to determine when the voltage across the battery cell is less than a second threshold voltage, the second threshold voltage being less than the first threshold voltage; and an electronic switch in the form of a MOSFET semiconductor, wherein the electronic is switch responsive to the voltage detector and is configured to shunt current around the battery cell when the voltage detector has determined the battery cell voltage is greater than the first threshold voltage and to cease shunting current around the battery cell when the voltage detector has determined the voltage across the battery cell is less than the second threshold voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification