Battery isolation circuit
AssigneeMicrosoft Technology Licensing, LLC
InventorsVinod L. Hingorani, Hamid Shayesteh-pour
Life of this patent
Estimating the term…
Abstract
Various embodiments relating to a battery isolation circuit for disconnecting a battery from a load are disclosed. In one embodiment, a battery isolation circuit includes a power switch, a protection circuit module (PCM), and a drive diverter. The power switch may be operatively intermediate a battery and a load. The PCM may be operatively connected to the power switch. The PCM may be configured to selectively drive the power switch to electrically connect the battery to the load. The drive diverter may be configured to interrupt the PCM from driving the power switch in order to electrically disconnect the battery from the load in response to activation of a user-operable switch.
Claims20
A battery isolation circuit comprising:
- a power switch operatively intermediate a battery and a load;
- a protection circuit module (PCM) operatively connected to the power switch, the PCM being configured to selectively drive the power switch to electrically connect the battery to the load, the PCM being configured to monitor a plurality of different parameters of the battery and to stop driving the power switch based on a comparison of at least one of the plurality of different parameters to a corresponding threshold;
- and
- a drive diverter configured to interrupt the PCM from driving the power switch in order to electrically disconnect the battery from the load in response to activation of a user-operable switch, the drive diverter being configured to interrupt the PCM by causing one of the plurality of different parameters to violate a corresponding threshold.
A battery isolation circuit comprising:
- a power switch operatively intermediate a battery and a load;
- a PCM operatively connected to the power switch, the PCM being configured to selectively drive the power switch to electrically connect the battery to the load;
- a user-operable switch including a first switch and a second switch operatively connected to a combinational logic gate, the combinational logic gate being configured to activate the user-operable switch in response to the first switch and the second switch being activated at the same time;
- and
- a drive diverter configured to interrupt the PCM from driving the power switch in order to electrically disconnect the battery from the load in response to activation of the user-operable switch.
A battery isolation circuit comprising:
- a FET switch operatively intermediate a battery and a load;
- a PCM operatively connected to the FET switch, the PCM being configured to selectively drive the FET switch to electrically connect the battery to the load by supplying a drive voltage to the FET switch, receive a battery supply voltage from a positive terminal of the battery, and in response to the battery supply voltage being less than a low voltage threshold, stop supplying the drive voltage to the FET switch;
- and
- a drive diverter including a first resistor operatively intermediate the PCM and a positive terminal of the battery, a second resistor connected in series with the first resistor, and a FET having a drain operatively connected to the second resistor, a gate operatively connected to a user-operable switch, and a source operatively connected to the ground, and wherein activation of the user-operable switch charges the gate of the FET causing the first resistor and the second resistor to form a voltage divider that lowers the battery supply voltage below the low voltage threshold to interrupt the PCM from driving the FET switch.
Dependencies are inferred from the claim text.