Battery current measurement
First Claim
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1. A method of detecting a battery current in an uninterruptible power supply, the method comprising acts of:
- using a charger, providing a battery current to a battery along a charging path;
opening the charging path to stop the battery current to the battery;
determining a first total current supplied by the charger, the first total current being supplied while the charging path is opened;
enabling the battery current to be provided to the battery;
determining a second total current supplied by the charger, the second total current being supplied by the charger while the battery current is being supplied to the battery; and
determining, based on the first total current and the second total current, a value representative of the battery current.
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Abstract
A method of detecting a battery current in an uninterruptible power supply and a system directed to the same is provided and includes providing a battery current to a battery along a charging path using a charger, opening the charging path to stop the battery current to the battery, determining a first total current supplied by the charger, while the charging path is opened, enabling the battery current to be provided to the battery, determining a second total current supplied by the charger, while the battery current is being supplied to the battery, and determining a value representative of the battery current.
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Citations
20 Claims
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1. A method of detecting a battery current in an uninterruptible power supply, the method comprising acts of:
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using a charger, providing a battery current to a battery along a charging path; opening the charging path to stop the battery current to the battery; determining a first total current supplied by the charger, the first total current being supplied while the charging path is opened; enabling the battery current to be provided to the battery; determining a second total current supplied by the charger, the second total current being supplied by the charger while the battery current is being supplied to the battery; and determining, based on the first total current and the second total current, a value representative of the battery current. - View Dependent Claims (2, 3, 4, 5)
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6. An uninterruptible power supply system, the system including:
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an input configured to receive input power having an input voltage; a battery configured to store battery power; an output configured to provide output power derived from at least one of the input power and the battery power; a charging circuit, connected to the battery and power circuitry, the charging circuit configured to provide a total current, the total current including at least one of a first portion which is provided to the battery and a second portion which is provided to the power circuitry; a charger current sensor configured to detect the total current and provide at least one sense signal indicative of the total current; a switch connected to the battery and being configured to selectively control provision of current to the battery; and a controller, coupled to the switch and to the charger current sensor, the controller being configured to; open the switch to prevent the battery from receiving the first portion of the total current; receive, from the charger current sensor, a first sense signal indicative of the total current; close the switch to enable the battery to receive the first portion of the total current; receive, from the charger current sensor, a second sense signal indicative of the total current; and determine, based on the first sense signal and the second sense signal, a value representative of the first portion of the total current. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An uninterruptible power supply system, the system comprising:
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a charger, connected to a battery and a logic power supply, the charger configured to provide a total current including at least one of a first portion which is provided to the battery and a second portion which is provided to the logic power supply, the charger including a charger current sensor configured to detect the total current and provide at least one sense signal indicative of the total current; and means for controlling the charger current sensor to detect the first portion of the total current and the second portion of the total current.
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Specification