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| Number | Title | Issue Date |
| 7612530 | Bridge battery voltage equalizer This present invention provides a bridge battery voltage equalizer to equalize the voltages of the serially connected battery strings, comprising at least one battery crossing over an energy-transferring circuit. A plurality of the energy-transferring circuits are i... | 11/03/2009 |
| 7602146 | Protection methods, protection circuits and protection devices for secondary batteries, a power tool, charger and battery pack adapted to provide protection against fault conditions in the battery pack In a cordless power tool system, protection methods, circuits and devices are provided to protect against fault conditions within a battery pack that is operatively attached to a power tool or charger, so as to prevent internal or external damage to the battery pack... | 10/13/2009 |
| 7417408 | Method and arrangement for charging capacitors of direct-voltage intermediate circuit of frequency converter A method and an arrangement for charging capacitors of a direct-voltage intermediate circuit of a frequency converter. The arrangement comprises a charging circuit (CCA) comprising a first diode (D1) and a second diode (D2) connected in series with the... | 08/26/2008 |
| 7365515 | Universal battery charger To provide a universal battery charger with low power consumption during a standby condition and a rush current suppressing capability at the time of commencement of charging, a voltage slightly larger than a battery voltage is produced and applied to the battery. T... | 04/29/2008 |
| 7352155 | Apparatus and method for detecting battery pack voltage An apparatus and method for detecting battery pack voltage is disclosed. The voltage detection apparatus includes a plurality of selectors for providing a cell voltage of a predetermined cell, a detector buffer for receiving the cell voltage of the predetermined cel... | 04/01/2008 |
| 7342768 | Active balancing modular circuits Provided are active balancing modules that control voltage imbalances between capacitors stacked in a series arrangement and methods for their manufacture. These modules are simple and inexpensive to manufacture, and versatile. They may be used alone or they may be ... | 03/11/2008 |
| 7312596 | Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy ... | 12/25/2007 |
| 7304453 | Methods and systems for assembling batteries A large battery pack of specified voltage and capacity can be assembled from a plurality of identical small cells by dividing the specified capacity by a nominal battery module capacity to determine a desired number of parallel modules to be provided, dividing the n... | 12/04/2007 |
| 7298114 | Nickel hydrogen/nickel cadmium battery charger with the function of emergency power supply A NiH/NiCd (nickel hydrogen/nickel cadmium) battery charger with the function of emergency power supply unit having a main body with a charging chamber and a charging circuit positioned within the main body to allow an electric connection to the charging chamber and... | 11/20/2007 |
| 7288919 | Voltage balance circuit, voltage detective circuit, voltage balancing method, and voltage detecting method When a control section (39) turns on a switch (31, 33, 35), a capacitor (37) is connected to a secondary battery (B1) in parallel. Accordingly, voltage between both ends of each capacitor (37, 38) reaches voltage between both polar... | 10/30/2007 |
| 7218076 | Battery charging system A battery charging system comprising: a current source; a battery; and a voltage and current regulator, which regulates voltage applied to the battery and current supplied to the battery. The battery charging system shapes the current supplied to the battery, and ma... | 05/15/2007 |
| 7199489 | Battery communication system An uninterrupted power supply (“UPS”) system is disclosed which uses a battery communication system to communicate to a UPS processor information concerning the status of a battery pack in an array of parallel coupled battery packs. The battery packs provide bac... | 04/03/2007 |
| 7180267 | Capacity adjustment apparatus for battery pack and capacity adjustment method for battery pack If the voltage at any cell has become equal to or lower than a low-voltage decision-making voltage Vc1 and the average voltage among cells calculated based upon the total voltage at a battery cell is higher than a predetermined voltage level, it is determined... | 02/20/2007 |
| 7148654 | Method and apparatus for monitoring fuel cell voltages A system and method for monitoring cell voltages for a plurality of electrochemical cells connected in series forming a cell stack. The method includes dividing the cells into at least two cell groups, measuring the voltage across each cell group and estimating the ... | 12/12/2006 |
| 7124040 | Method of monitoring a fuel cell unit In a method of monitoring a fuel cell unit, at least one pair of measured values, including a measured current value and a measured voltage value (Iactual, Uactual) are determined at the outputs of the fuel cell unit. The measured voltage value... | 10/17/2006 |
| 7091697 | System and method for efficiently implementing a battery controller for an electronic device A system and method for effectively managing operating power for an electronic device may include a battery pack coupled to the electronic device for supplying operating power to the electronic device. A battery controller may be configured as a single integrated-ci... | 08/15/2006 |
| 7091696 | Method and apparatus for regulating state of charge in battery assembly A method and an apparatus for regulating state of charge in a battery assembly in which respective voltages across unit cells can be equalized in a short time. Among a plurality of unit cells B1 to B4 . . . Bn, the unit cell having the largest voltage ... | 08/15/2006 |
| 7084608 | PCMCIA card with dedicated on-board battery A PCMCIA card is provided that includes an on-board (integrated) storage battery and, preferably, charging circuitry for same. The on-board storage battery is dedicated to operation of on-board devices that have higher current/power requirements than are available f... | 08/01/2006 |
| 7012434 | Method for determining the amount of charge which can be drawn from a storage battery and monitoring device A method for determining the amount of charge which can be drawn from a storage battery and a monitoring device are provided that measure at least one of battery currents and battery voltages at at least two points in time before or during a rise phase and during or... | 03/14/2006 |
| 6975094 | Method and device for charging several electrochemical cells In a method of charging several electrochemical cells 5, 6, 7 connected in series, by a charger 1 which allows adjusting the voltage and the charging current, the voltage of each cell is detected permanently, and when a first cell reaches a predetermin... | 12/13/2005 |
| 6943529 | Battery charging system A battery charging system comprising: a current source; a battery; and a voltage and current regulator, which regulates voltage applied to the battery and current supplied to the battery. The battery charging system shapes the current supplied to the battery, and ma... | 09/13/2005 |
| 6943530 | Battery charging system A battery charging system comprising: a current source; a battery; and a voltage and current regulator, which regulates voltage applied to the battery and current supplied to the battery. The battery charging system shapes the current supplied to the battery, and ma... | 09/13/2005 |
| 6933703 | Selectively activated electrochemical cell system A power generating system is described including a plurality of electrochemical cells. The cells are generally arranged in sections that are selectively activated individually or in combination to produce power from selected cell sections. A method of generating pow... | 08/23/2005 |
| 6919707 | Battery power source device, method for controlling the same, and method for providing address A method for controlling and addressing a battery power source device having a plurality of battery pack systems connected in parallel or serially in parallel, each battery pack system having a battery pack block and a battery ECU connected thereto, is provided. The... | 07/19/2005 |
| 6903534 | Method and apparatus for controlling cooling and detecting abnormality in battery pack system When an SOC difference between battery pack blocks exceeds a threshold, or a temperature difference between the battery pack blocks exceeds a threshold, a control section changes cooling modes and cooling control maps for cooling fans of respective battery pack bloc... | 06/07/2005 |
| 6824918 | Battery pack having internal batteries having equalized current characteristics In a battery pack, first through nth secondary batteries, where n is an integer of 2 or more, are sequentially stacked from the pack output terminals. (n+2)th and (n+1)th secondary batteries are disposed from positions of pack output... | 11/30/2004 |
| 6806685 | Accumulator power supply unit An accumulator power supply unit equalizing the voltage between terminals of the respective accumulator block to be a predetermined value without being affected by different characteristics of the accumulator block such as electric double layer capacitor and seconda... | 10/19/2004 |
| 6777917 | Supercapacitor balancing method and system The present invention relates to a method of and a system for charging at least one supercapacitor that is particularly suitable for balancing supercapacitors. The method includes a step (22) of bypassing the current flowing in the supercapacitor so that, whe... | 08/17/2004 |
| 6664766 | Supercapacitor balancing method and system The present invention relates to a supercapacitor balancing method including bypassing the current flowing in the supercapacitor from a predetermined threshold voltage at the terminals of the supercapacitor, the bypass current being a function of the volt... | 12/16/2003 |
| 6646418 | Method and apparatus for fuel cell protection A fuel cell system is protected by monitoring at least one fuel cell parameter, comparing the parameter to a preset level, and disconnecting or reconnecting a main load in response to the fuel cell parameter. For example, a fuel cell system (300) is provi... | 11/11/2003 |
| 6498957 | Power supply control in portable data terminal A data terminal apparatus includes a basic unit, a plurality of units, a power supply circuit, switching units and a controller. The basic unit realizes a basic function of the data terminal apparatus and requires a basic quantity of DC power. Each of the... | 12/24/2002 |
| 6476582 | Battery power supply apparatus In a battery power supply apparatus for low-noise measurement systems or ultra high-sensitivity sensor elements (ultra-sensitive light or microwave sensors, or SQUID, SIS/SNS or other Josephson effect devices, etc.), the power supply device that supplies ... | 11/05/2002 |
| 6430692 | Series-parallel battery array conversion A battery backup system has a number of batteries and number of switches interconnecting the batteries to either a high-power load or a low-power load. The batteries are selectively connected in series with each other, or in parallel with each other by th... | 08/06/2002 |
| 6396244 | Electric element control apparatus, battery system, and inverter motor system To improve accuracy in controlling battery output, a charge-storage element is connected in parallel to a plurality of power source units. Each power source unit includes a power source element, and power transmission and reception between the power sourc... | 05/28/2002 |
| 6362626 | Cell voltage measuring device for cell module The invention provides a cell voltage measuring device for a cell module wherein component cells are theoretically divided into a plurality of (n) cell blocks 111 to 11n. A plurality of potential detecting lines extending from respective potential detecti... | 03/26/2002 |
| 6281684 | Technique and apparatus to measure cell voltages of a fuel cell stack using different ground references A system that is usable with a stack of fuel cells that have cell terminals includes a circuit and scanning units. The circuit provides a selection signal that indicates selection of at least one of the fuel cells for a voltage measurement. The scanning u... | 08/28/2001 |
| 6271646 | Battery cell by-pass circuit The invention is a circuit and method of limiting the charging current voltage from a power supply net work applied to an individual cell of a plurality of cells making up a battery being charged in series. It is particularly designed for use with batteri... | 08/07/2001 |
| 6258479 | Method for determining amount of water to be added to a NiCd cell Deficiencies in the electrolyte level of the cells of NiCd battery can be detected by measuring the internal resistance of the cells. Initially, data is collected for a battery type and capacity, correlating measured internal resistance with the amount of... | 07/10/2001 |
| 6222284 | Multiphase power supply with series connected power cells with failed cell bypass A high output level is maintained in power supplies having multiple cells in each leg. Failed cells in any leg are bypassed to provide a current path through the respective leg. All of the unfailed cells are utilized while maintaining equal magnitude betw... | 04/24/2001 |
| 6211650 | Battery cell by-pass circuit The invention is a circuit and method of limiting the charging voltage applied to an individual cell of a plurality of cells making up a battery being charged in series. It is particularly designed for use with batteries that can be damaged by overchargin... | 04/03/2001 |