The Global Patent Exchange

Web: |  Phone: (650)292-4849 |  Email:

Patent for Sale:

Smart-Battery Monitoring over Power Circuit    

Monitoring of battery operating conditions without utilizing the power wires as a communications medium


A communications system that allows for transmission of battery state-of-charge and state-of-health data via the DC power bus itself, and avoiding the need for a dedicated communications bus, while allowing each battery cell to include its own monitoring device, possibly embedded within the cell itself, without additional communications terminals or risk of miswiring.

A monitoring device is embedded within each cell, measuring its operating conditions from within, and containing its life-time use history and serial number for long-term diagnosis. The monitoring device periodically transits modulated cell operating conditions over the direct-current power bus by coupling the modulated data onto the power bus by means of a Rogowsky coil mounted on one of the power terminals within the cell enclosure.

A collection system is decoupling the signals from all cells in a battery system by means of a similar Rogowsky coil, demodulates and discriminates the signals, and transmit the data to the battery system controller.

The cell operating condition data is used to optimize the charging process, and regulate the energy consumption for prolonged cell life and optimal power storage effeciency.

Primary Application of the Technology

The electrical energy storage subsystem accounts of a significant capital value in many large electrically-operated systems, including electric vehicles, off-gri power generation system, telecommunications sites etc.

When a battery system is expensive to replace, it is cost-effective to employ advanced cell monitoring methods to optimize charging and discharging profiles and initiate preventive maintenance, all to achieve the best possible energy exchange efficiency, and extend the useful life of the battery system.

Competitive Advantage

Present smart-battery systems use a centralized voltage measurement apparatus that sacrifices voltage measurement accuracy for supporting the extremely high voltage of the entire cell series. These centralized measurements systems also lack the ability to measure temperature inside each cell, and compromise temperature accuracy by measuring average battery system temperature, which does not clearly indicate potential problems in an individual cell.

Other present systems that include a monitoring device locally at each cell, require a separate communications bus which must employ galvanic isolation circuity to mitigate the high voltage difference between all cells in a system. This communications bus is also susceptible to a verity of maintenance-related difficulties.

The patent proposes to use the direct-current power bus as a communications medium, and discloses a method of communications specifically aimed at the direct-current power bus, a communications method that is robust, scalable and does not emit any radio frequency interference.

The seller may consider selling these patents individually.

Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 320: Electricity: Battery Or Capacitor Charging Or Discharging

Method or apparatus for controlled or regulated charging, discharging, or combined charging and discharging of one or more voltaic cells, batteries, or capacitors. Charging or electrically rejuvenating (e.g., depolarizing, etc.) a voltaic cell, battery, or electrical capacitor, wherein said charging or rejuvenating is accomplished by controlled addition of electrical energy into the cell, battery, or capacitor. Discharging - a voltaic cell, battery, or electrical capacitor, wherein discharging is accomplished by controlled release of electrical. A cell, battery, or capacitor structurally combined with a generator or electrical converter, whether or not electrical interconnection therebetween is recited.

Subclass 162: With detection of current or voltage amplitude

Class 29: Metal Working

Metal working or shaping - it comprises processes, tools, machines, and apparatus not classifiable in the specific classes relating to the manufacture of articles from metal. It has been made the generic class for the following regardless of the composition of the blank, stock material, or article recited or worked upon: (a) process of electric condenser making; (b) a burnishing process; (c) a process of manufacture; (d) apparatus used to assemble or disassemble.

Subclass 605: By winding or coiling

Class 307: Electrical Transmission Or Interconnection Systems

This is the residual class for all subject matter, not elsewhere classified, relating to electrical transmission or interconnection systems.


View this listing on the Tynax website: