Lucent Technologies Inc.

Tyco Electronics Logistics Ag

Lineage Power Corporation

Marc Daniel Hirsch

Patrick Kwok-Yeung Ng

Mark Allen Johnson

Roy Jaescentt Davis

Robert J Kakalec

John Christopher Brooke

Gregory W Mathiesen

The present invention provides a central current share coordinator for use with remotely and non-remotely controllable rectifiers coupled to an output bus. In one embodiment, the central current share coordinator includes a rectifier current resolver configured to determine an existing current share condition for the remotely and non-remotely controllable rectifiers. Additionally, the central current share coordinator also includes a load share adjuster coupled to the rectifier current resolver and configured to adjust an output current of the remotely controllable rectifiers toward a target current share distribution on the output bus.

Central current share coordinator, method of current sharing and battery plant employing the same

A method for monitoring and diagnosing the status of a battery in an electrical system, more particularly, a method for determining a battery's reserve time based on comparison of measurements made during a battery discharge to a universal normalized discharge curve. Specifically, a battery discharge is initiated and the battery's voltage and discharge time is continuously measured. The measured battery voltage is normalized by dividing it by either the peak voltage or foothill voltage, as monitored during the discharge. By comparing this normalized voltage measurement to a universal normalized discharge curve, the percent discharge level of the battery is determined. Using the percent discharge level and the discharge time, the reserve time and total capacity of the battery can be determined.

Battery diagnostic method utilizing a universal normalized discharge curve for predicting battery reserve time

A battery diagnostic method for monitoring the status of a battery in an electrical system and continuously providing a relatively accurate prediction of battery condition and performance, more particularly, a self-adjusting method for providing the best possible prediction of a battery's reserve time before, during, and after a battery discharge. The method of the present invention utilizes different prediction methods depending on what state the electrical system is in; that is, before, during or after a battery discharge. By determining what state the system is in, the most effective prediction method can be utilized to provide an accurate battery reserve time. By providing a relatively accurate continuous reserve time prediction, the method helps prevent a complete loss of power in an electrical system relying on a battery to supply the system's electrical power.

Self-adjusting battery diagnostic method for continuously providing best

A central contactor controller for a battery plant containing a power supply couplable to a source of AC power and a battery via a bus, the bus further couplable to a load to supply power thereto, and a method of operation thereof. In one embodiment, the controller includes: (1) a sensor that senses operational states of the power supply and the battery and (2) central control circuitry, coupled to the sensor and couplable to distributed contactors associated with the battery and the load, that provide control information to distributed control circuitry associated with the distributed contactors in response to the operational states, the distributed control circuitry employing the control information to control the distributed contactors selectively to couple the battery and the load to the bus.

Unified contactor control system for battery plant and method of

A self-correcting and adjustable apparatus and method of predicting remaining capacity (Q) and reserve time (t) of a discharging battery to a selected end voltage determined by an arrangement considering the open circuit voltage (E.sub.oc), battery voltage (V) battery temperature (T) and battery internal resistance (R.sub.int). The apparatus and method of the present invention utilize a calculation process which first compares calculated and measured capacity discharged between two times (Q.sub.dis.calc. -Q.sub.dis.act.). If this difference exceeds a certain predetermined tolerance or limit of error, the calculation process is adjusted or tuned and the comparison is repeated until the difference between the actual capacity and the calculated capacity are within a predetermined tolerance. The calculation process is tuned by adjusting the value attributed to the battery's internal resistance (R.sub.int). A correlation between battery capacity and battery internal resistance is used to make a reasoned initial adjustment to the calculation process. Then an iterative process of successive approximations is used to tune the calculation process within a given tolerance factor. Once the calculation process has been tuned, the adjusted internal resistance (R.sub.int) is then used for subsequent calculations of remaining battery capacity (Q) and reserve time (t). The calculation process may be tuned or adjusted initially, intermittently, or throughout the battery discharge.

Growing community of inventors

Dallas, TX, United States of America

Marc Daniel Hirsch