Patent ID: 9484770
Filing Date: 2016-11-01
CPC Classification: H02J

Claim Text:
1. A method of charging a chemical storage device, comprising: receiving, at a charging system, an Alternating Current (AC) voltage from an AC voltage source, wherein the AC voltage comprises a sine wave with a period and an amplitude; detecting a positive zero crossing, a positive zero crossing occurring when the sine wave has an amplitude of zero as it crosses from an amplitude in a first direction to an amplitude in a second direction; opening a gate in response to the detection of the positive zero crossing, the opening of the gate allowing the AC voltage to pass to a chemical storage device; detecting a negative zero crossing, a negative zero crossing occurring when the sine wave has an amplitude of zero as it crosses from an amplitude in the second direction to an amplitude in the first direction; and closing the gate in response to the detection of the negative zero crossing, the closing of the gate preventing any AC voltage from the AC voltage source from passing to the chemical storage device despite the charging system continuing to receive the AC voltage from the AC voltage source.