Adaptive low voltage disconnect controller, method of protecting a battery and a power system manager
First Claim
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1. A controller for a low voltage disconnect (LVD), comprising:
- an adaptive disconnect system configured to determine a variable LVD threshold voltage value and instruct said LVD to disconnect a battery reserve from a DC load bus based thereon, wherein said variable LVD threshold voltage is determined based on a current of said battery reserve during a battery-discharge event.
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Abstract
Provided herein is a controller for a low voltage disconnect (LVD), a method of protecting and providing a maximum or substantially maximum battery reserve coupled to a DC load bus and a power system manager. In one embodiment, the LVD controller includes an adaptive disconnect system configured to determine a variable LVD threshold voltage value and instruct the LVD to disconnect a battery reserve from a DC load bus based thereon. The variable LVD threshold voltage is determined based on a current of the battery reserve during a battery-discharge event.
6 Citations
20 Claims
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1. A controller for a low voltage disconnect (LVD), comprising:
an adaptive disconnect system configured to determine a variable LVD threshold voltage value and instruct said LVD to disconnect a battery reserve from a DC load bus based thereon, wherein said variable LVD threshold voltage is determined based on a current of said battery reserve during a battery-discharge event. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of protecting a battery reserve coupled to a DC load bus, comprising:
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initiating a timer for a time delay based on simultaneously detecting a failure associated with an AC supply employed to provide voltage to said DC load bus and a battery discharge event of said battery reserve; comparing a voltage on said DC load bus to a low voltage disconnect (LVD) threshold voltage; and sending a signal to disconnect a switch connecting said battery reserve to said DC load bus, wherein said signal is sent based on when said LVD threshold voltage is detected on said DC load bus or after said time delay. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A power system manager, comprising:
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a user interface configured to accept input from a user; and a low voltage disconnect (LVD) controller coupled to said user interface, including; an elapsed-time disconnect system configured to disconnect a battery reserve from a DC load bus based on a designated amount of time; and an adaptive disconnect system configured to disconnect said battery reserve from said DC load bus based on a variable LVD threshold voltage, wherein said variable LVD threshold voltage is determined from a load on said battery reserve during a battery-on-discharge event. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification