Isolation barrier fault detection circuit
First Claim
1. An energy storage system configured to output at least two voltage waveforms, comprising:
- a semiconductor relay switch;
one or more battery packs, wherein one terminal of the one or more battery packs of the energy storage system is electrically coupled to a resistor of a plurality of resistors, wherein the plurality of resistors is configured to electrically couple to the one or more battery packs via the semiconductor relay switch;
a gain field-effect transistor (FET) configured to electrically short at least one resistor of the plurality of resistors, wherein the at least one resistor of the plurality of resistors is electrically coupled in parallel to the gain FET and is directly coupled to a voltage output terminal configured to output the at least two voltage waveforms for determining an isolation resistance of the energy storage system;
one or more capacitors electrically coupled to a system ground of a vehicle and the one or more battery packs; and
a control system configured to control the semiconductor switch and the gain FET.
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Accused Products
Abstract
An energy storage system may include one or more battery packs, wherein one terminal of the one or more battery packs is electrically coupled to a resistor representative of an isolation resistance of the energy storage system, a semiconductor relay switch, a plurality of resistors configured to electrically couple to the one or more battery packs via the semiconductor relay switch, a gain field-effect transistor (FET) configured to electrically short at least one resistor of the plurality of resistors, one or more capacitors electrically couples to a system ground of a vehicle and the one or more battery packs, and a control system configured to control the semiconductor switch and the gain FET.
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Citations
22 Claims
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1. An energy storage system configured to output at least two voltage waveforms, comprising:
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a semiconductor relay switch; one or more battery packs, wherein one terminal of the one or more battery packs of the energy storage system is electrically coupled to a resistor of a plurality of resistors, wherein the plurality of resistors is configured to electrically couple to the one or more battery packs via the semiconductor relay switch; a gain field-effect transistor (FET) configured to electrically short at least one resistor of the plurality of resistors, wherein the at least one resistor of the plurality of resistors is electrically coupled in parallel to the gain FET and is directly coupled to a voltage output terminal configured to output the at least two voltage waveforms for determining an isolation resistance of the energy storage system; one or more capacitors electrically coupled to a system ground of a vehicle and the one or more battery packs; and a control system configured to control the semiconductor switch and the gain FET. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system, comprising:
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a chassis; and an energy storage system configured to monitor an isolation resistance between the energy storage system and the chassis, wherein the energy storage system comprises; a semiconductor relay switch; one or more battery packs, wherein one terminal of the one or more battery packs of the energy storage system is electrically coupled to a resistor of a plurality of resistors, wherein the plurality of resistors is configured to electrically couple to the one or more battery packs via the semiconductor relay switch; a gain field-effect transistor (FET) configured to electrically short at least one resistor of the plurality of resistors, wherein the at least one resistor of the plurality of resistors is electrically coupled in parallel to the gain FET and is directly coupled to a voltage output terminal configured to output a voltage waveform for determining an isolation resistance between the energy storage system and the chassis; one or more capacitors electrically coupled to a system ground and the one or more battery packs; and a control system configured to control the semiconductor switch and the gain FET. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An isolation measurement circuit for detecting an isolation barrier fault, comprising:
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a semiconductor relay switch; a plurality of resistors configured to electrically couple to one or more battery packs via the semiconductor relay switch, wherein one terminal of the one or more battery packs is electrically coupled to a resistor of the plurality of resistors of an energy storage system; a gain field-effect transistor (FET) configured to electrically short at least one resistor of the plurality of resistors, wherein the at least one resistor of the plurality of resistors is electrically coupled in parallel to the gain FET and is directly coupled to a voltage output terminal configured to output a voltage waveform for determining an isolation resistance between the energy storage system and a chassis; one or more capacitors electrically coupled to a system ground of a vehicle and the one or more battery packs; and a control system configured to control the semiconductor switch and the gain FET. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification