Patent application number | Description | Published |
20080231231 | SYSTEM AND METHOD FOR BALANCING STATE OF CHARGE OF SERIES CONNECTED CELLS - A system and method for charging an undercharged cell of a bank of series connected cells utilizes a charging circuit. The charging circuit includes an inductor that receives current from the entire bank of cells and then provides current to the undercharged cell. Pulse width modulation is utilized to turn the switches on and off to regulate the current that flows to the inductor and thus is provided to the undercharged cell. | 09-25-2008 |
20080272791 | SYSTEM TO MEASURE SERIES-CONNECTED CELL VOLTAGES USING A FLYING CAPACITOR - A system for measuring voltage of individual cells connected in series includes a single flying capacitor. The capacitor stores the charge of one of the cells such that an analog-to-digital converter (ADC) connected to the capacitor may process an accurate representation of the voltage of the cell being measured. A plurality of MOSFET-based switches electrically connects and disconnects the cells and the capacitor. A controller is in communication with the ADC and the switches for sequencing the switches and recording the voltage measurements of each cell. | 11-06-2008 |
20080274400 | BATTERY CELL HAVING ENERGY CONTROL DEVICE - A battery assembly includes a plurality of battery cells. Each cell includes a plurality of first electrodes and second electrodes. First and second insulators extend over the first and second electrodes. An envelope or shell extends over the first and second insulators thereby encapsulating the first and second insulators. A lithium energy control electronics device (the LEC) is disposed, i.e. integrated inside the shell of each cell of the battery assembly. Each cell of the battery assembly is electronically and operatively communicated with one another through the respective LEC disposed inside each cell. | 11-06-2008 |
20090184797 | FUSE ASSEMBLY WITH INTEGRATED CURRENT SENSING - A fuse assembly includes a main component partially encased in a protective sheath. The main component includes a pair of connectors formed of an electrically conductive material to allow the fuse assembly to be electrically connected into an electric vehicle drive system. A fusible link is electrically connected between the connectors and is preferably encased in the protective sheath. The fusible link reacts to current flowing through the fuse assembly in excess of a predetermined current for a predetermined time, as is well known to those skilled in the art. | 07-23-2009 |
20110031974 | Method and System to Measure Series-Connected Cell Voltages using a Flying Capacitor - A method and system for measuring voltage of individual cells connected in series includes a pair of busses connectable to the cells and a flying capacitor connectable to the busses. The capacitor stores the charge of one of the cells such that an analog-to-digital converter (ADC) connected to the capacitor may process an accurate representation of the voltage of the cell being measured. In order to prevent electrical interference with the capacitor and the ADC, the charge on the busses is reduced prior to measurement by the ADC | 02-10-2011 |
20120056625 | Method and System to Measure Series-Connected Cell Voltages Using a Flying Capacitor - A method and system for measuring voltage of individual cells connected in series includes a pair of busses connectable to the cells and a flying capacitor connectable to the busses. The capacitor stores the charge of one of the cells such that an analog-to-digital converter (ADC) connected to the capacitor may process an accurate representation of the voltage of the cell being measured. In order to prevent electrical interference with the capacitor and the ADC, the charge on the busses is reduced prior to measurement by the ADC | 03-08-2012 |
20120068665 | System and Method for Balancing a State of Charge of Series Connected Cells - A method of balancing a state of charge (SOC) of a plurality of cells connected in series, including identifying an undercharged cell from the plurality of cells to charge, electrically connecting a positive side of the undercharged cell to a positive bus, electrically connecting a negative side of the undercharged cell to a negative bus, electrically connecting an inductor to a voltage source during a first time period; electrically disconnecting the inductor from the voltage source in response to an elapse of the first time period, and maintaining the disconnection of the inductor from the plurality of cells for a second time period corresponding generally to the time for the inductor to discharge energy to the undercharged cell. | 03-22-2012 |
20120310568 | Monitoring Battery State of Charge - Systems and methods for monitoring a state of charge of a battery are disclosed. An updated state of charge of the battery may be determined based on a measured terminal voltage of the battery, a measured current of the battery, and a value of at least one battery parameter selected from a plurality of values based on a prior state of charge of the battery. | 12-06-2012 |
20140097797 | ENERGY STORAGE SYSTEM - An energy storage system is disclosed. The energy storage system may include a power control module coupled to a plurality of energy modules each including a plurality of batteries. The plurality of batteries may be placed in a plurality of containers and arranged in a plurality of parallel strings. | 04-10-2014 |