Patents Examined by Edward H. Tso
  • Patent number: 7365517
    Abstract: A remaining battery capacity indicating apparatus includes an end voltage accumulated value setting unit operable to set an accumulated value indicative of a remaining capacity of a lithium-ion secondary battery, the accumulated value being set in a fully charged state of the battery so that the accumulated value reaches zero when a voltage in the battery is a device-side end voltage. It is determined whether a battery-side end voltage which ends discharges from the lithium-ion secondary battery corresponds to the device-side end voltage. If the battery-side end voltage does not correspond to the device-side end voltage, then the accumulated value is corrected in response to the device-side end voltage. A remaining capacity of the battery, corresponding to the device-side end voltage, is calculated based on the corrected accumulated value, and the calculated remaining capacity of the battery is displayed on a display unit.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: April 29, 2008
    Assignee: Sony Corporation
    Inventors: Masaki Sakurai, Yukio Tsuchiya, Hideyuki Sato
  • Patent number: 7362074
    Abstract: A method for determining deterioration of accumulator battery hooked up with loads in a system based on results of measuring internal resistances of an accumulator battery, the method comprising the steps of; predetermining as a specified temperature a temperature at which the deterioration of the accumulator battery is determined; calculating in advance temperature correction coefficients of the internal resistances from changes of the internal resistances depending on temperatures; predetermining resistance-voltage conversion factors to convert between the internal resistances at the specified temperature and terminal discharge voltages of the accumulator battery which are obtained at the specified temperature under a condition of flowing predetermined discharge currents from the accumulator battery; measuring the internal resistances of the accumulator battery and temperature of the accumulator battery at an internal resistance measurement; converting the measured internal resistance values into the int
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: April 22, 2008
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Noriyasu Iwane, Yuichi Watanabe, Takezo Sugimura, Toshiyuki Satoh, Atsushi Kimura, Fumikazu Iwahana, Katsumi Inaniwa, Tetsuya Kanou
  • Patent number: 7362073
    Abstract: A method and system for dynamically controlling and managing a fuel cell system is provided. The method and system ensures that predetermined operating parameters and conditions are met. This is achieved using programmable on-board hardware that is already available in the fuel cell system and does not require additional components. More specifically, operating characteristics are measured such as the voltage of the weakest cell, the stack output voltage, the stack output current, the current of a battery being charged by the stack and/or the power of the stack. When each of these measurements is taken, a determination is made to find the load change that should be made in order to adjust the stack voltage to achieve a desired goal. In particular, the load on the fuel cell system can be varied by adjusting the duty cycle of the switches within a DC-DC converter that is being operated by an associated microcontroller.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: April 22, 2008
    Assignee: MTI MicroFuel Cells, Inc.
    Inventor: John Edward Lecky
  • Patent number: 7362076
    Abstract: It calculates a capacity difference ESOC between a reference remaining capacity SOCV based on an open-circuit voltage and a final remaining capacity SOC in a previous one calculation cycle. It calculates a proportional correction amount and an integral correction amount according to a proportional-integral control by using this capacity difference ESOC, and requires a final remaining capacity SOC by adding a remaining capacity SOCI based on a current integration to these correction amounts. Thus, while making good use of the remaining capacity based on the battery open-circuit voltage, it can avoid the influence of the load fluctuation and require a remaining capacity always stable and accurate.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: April 22, 2008
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Atsushi Namba, Mikio Ono
  • Patent number: 7362075
    Abstract: The present invention relates to a battery charger for charging a battery. The present invention especially relates to a battery charger comprising a switching power supply controlled on the primary side and a charge monitoring circuit for monitoring the charge state of the battery. For providing an improved battery charger which allows a secure and reliable charging of batteries with a reduction of the circuit complexity, the costs for appliances and the construction size, the charge monitoring circuit is—according to the invention—disposed in the switching circuit on the primary side of the battery charger.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: April 22, 2008
    Assignee: Friwo Geraetebau GmbH
    Inventors: Michael Bothe, Ralf Schroder gen. Berghegger, Georg Breuch
  • Patent number: 7355366
    Abstract: A charging system and method for charging a communication terminal are provided which supply to a battery a compensation current equivalent to an amount of current input to a communication terminal. The charging method includes detecting a value of current flowing to a communication terminal when a battery attached to the communication terminal is being charged by a charging device, outputting to the charging device a data signal corresponding to the detected current value, and adding a compensation current to the current input to the battery based on the detected current value. Regardless of an operation of the communication terminal, a constant current is supplied to the battery being charged, and thus, time taken for completing charging of the battery can be reduced.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: April 8, 2008
    Assignee: LG Electronics Inc.
    Inventor: Sang Woo Kim
  • Patent number: 7352152
    Abstract: An electronic appliance has a data read/write section which reads information about a battery stored in a wireless tag provided in the battery, and a CPU which recognizes the read information about the battery and generates battery remaining energy warning information to be displayed on a display section according to the battery information. The battery remaining energy warning information according to the kind of the battery, the name of the manufacturer of the battery, etc., is generated and displayed to correctly and effectively inform a user of a remaining energy warning about the battery presently used.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: April 1, 2008
    Assignee: Fujifilm Corporation
    Inventors: Ryuji Kawaguchi, Masakatsu Kubota, Atsuhiko Ishihara, Seiji Kawasumi
  • Patent number: 7348760
    Abstract: A wake up circuit according to one embodiment includes a comparison circuit and an output decision circuit. The comparison circuit may be adapted to receive a first signal representative of a charging current level provided to a battery via a path and a second signal representative of a predetermined wake up current level and to provide a comparison output signal in response to the first and second signal. The output decision circuit may be adapted to receive at least the comparison output signal and a selector signal from a selector circuit, the output decision circuit providing one of the comparison output signal and the selector signal to a switch to control a state of the switch, the switch coupled to the path.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: March 25, 2008
    Assignee: O2Micro International Limited
    Inventors: Constantin Bucur, Vlad Popescu-Stanesti, Marian Niculae, Daryl Nees
  • Patent number: 7348763
    Abstract: A method for determining the state of a battery, or battery pack, that is independent of the type of battery technology under test. The method employs one or more charging and discharging cycles, and measures one or more parameters of battery voltage, temperature, charging time, and charging cycle counts to produce a test value that is compared to empirical data. Based on the comparison, the state is determined, for example, on a pass/fail basis. The method may be embodied as instructions stored in memory and implemented by means of a microprocessor coupled to the memory. In another embodiment, the empirical data is stored within another memory located internal to the battery pack under test.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: March 25, 2008
    Assignee: Linvatec Corporation
    Inventors: Ronald R. Reinhart, Frederick M. Jenkins, James M. Raver, Thong L. Nguyen, Martin A. Schaefer
  • Patent number: 7345451
    Abstract: A power supply device providing required power to a loading device. The power supply device includes a battery, an adjustable power converter and a control circuit. The battery, having a current meter, selectively outputs required power to the loading device. The power converter receives and converts an AC voltage into a first DC voltage or a second DC voltage, further receives an adjusting signal. The power converter outputs the second DC voltage when the adjusting signal is enabled. The magnitude of the second DC voltage is lower than the output voltage of the battery. The control circuit is coupled to the battery and the power converter. When the power of the battery is gauged, the control circuit enables the adjusting signal for the power converter to output the second DC voltage, so that the battery discharges the loading device for the current meter to re-gauge the power of the battery.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: March 18, 2008
    Assignee: Quanta Computer Inc.
    Inventor: Sheng-Feng Chen
  • Patent number: 7339353
    Abstract: A power source system including a power distribution apparatus has an energy management system for managing the provision of power from multiple power sources to multiple electrical devices. The power distribution apparatus may have a combination of primary and secondary sources connected to it. It may also have a variety of electrical devices connected to it, receiving power through the power distribution apparatus.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: March 4, 2008
    Assignee: Quallion LLC
    Inventors: Alvaro Masias, Hiroshi Mukainakano, Hisashi Tsukamoto
  • Patent number: 7339350
    Abstract: An electrical combination, a method and a power tool. An electrical combination may includes an electrical component including a component housing, and an electrical circuit supported by the component housing, a first terminal assembly at least electrically connectable to the electrical circuit, a second terminal assembly at least electrically connectable to the electrical circuit, a first battery including a first battery terminal assembly electrically connectable to the first terminal assembly to electrically connect the first battery to the electrical circuit such that power is transferable between the first battery and the electrical circuit, and a second battery including a second battery terminal assembly electrically connectable to the second terminal assembly to electrically connect the second battery to the electrical circuit such that power is transferable between the second battery and the electrical circuit. The second battery may be different than the first battery.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: March 4, 2008
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Mark Kubale, David Rozwadowski, Pamela Stegehuis, Robert Crisp
  • Patent number: 7339348
    Abstract: A battery pack includes a housing. A first battery is located in the housing, the first battery using a first cell technology. A second battery is located in the housing, the second battery using a second cell technology that is different from the first cell technology. The battery pack can be connected to a portable computer chassis to provide an extended life power source. Each battery is coupled to an independent battery management unit (BMU). Each BMU shares a common connector.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: March 4, 2008
    Assignee: Dell Products L.P.
    Inventors: Vinh X. Bui, Dan Kehoe
  • Patent number: 7339351
    Abstract: There is provided a battery pack system with estimation accuracy of a remaining capacity of a secondary batter enhanced. A current accumulation coefficient correction section 109 calculates a correction amount ? with respect to a current accumulation coefficient k in accordance with a battery electromotive force Veq from an electromotive force calculation section 105. A remaining capacity calculation section 112 estimates a remaining capacity SOC by current accumulation, based on the current accumulation coefficient k calculated from a correction amount ?, and a charging efficiency ? based on a currently estimated remaining capacity calculated by a charging efficiency calculation section 110.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: March 4, 2008
    Assignee: Panasonic EV Energy Co., Ltd.
    Inventors: Yusai Murakami, Masahiro Takada, Teruyoshi Egoshi, Norito Yamabe
  • Patent number: 7336054
    Abstract: An electrical device, such as a battery charger, a method for operating an electrical device, a method for charging a battery, and a software program for operating the electrical device and/or the battery charger. In some aspects, the battery charger is capable of charging different types of batteries and capable of operating on alternate sources of AC power or alternate sources of DC power. Also, the battery charging circuit will not operate if one of the power source, the battery, the power switch means and the control means (including the microcontroller) malfunctions. In addition, in the battery charging circuit, the battery under charge enables the operation of the battery charging circuit.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: February 26, 2008
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Robert Crisp, Kevin Glasgow, Joseph Willhide, Glen C. Spence, George L. Santana, Jr.
  • Patent number: 7336053
    Abstract: An electric equipment has a battery and an electric condenser that has an internal resistance lower than that of the battery and accumulates therein an electric power of the battery. A charge control circuit controls a charge current originating from the electric power of the battery and flowing from the battery to the electric condenser. The charge control circuit controls the charge current in accordance with a self-discharge rate of the battery. A load is driven with the electric power accumulated in the electric condenser.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: February 26, 2008
    Assignee: Seiko Instruments Inc.
    Inventors: Fumiyasu Utsunomiya, Kazuyoshi Furuta, Fumiharu Iwasaki, Tsuneaki Tamachi, Takafumi Sarata, Norimasa Yanase
  • Patent number: 7332893
    Abstract: A battery pack includes a switching control port, a battery stack, an output power port, and switch circuitry. The switching control port receives a switch control signal from a battery pack port. The switch circuitry selectively couples the battery stack to the output power port based at least in part on the switch control signal.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: February 19, 2008
    Assignee: Intel Corporation
    Inventors: Don J. Nguyen, Bruce W. Rose
  • Patent number: 7332891
    Abstract: In a battery pack which includes a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, the voltage of each parallel block of the battery pack before and after discharge or before and after charge of a predetermined amount of capacity is detected, and abnormality of the cells connected in parallel within each parallel block is determined based upon the amount of change of voltage of each parallel block.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: February 19, 2008
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Tomonaga Sugimoto
  • Patent number: 7332913
    Abstract: A method and apparatus for determining to which battery cell in a string of battery cells between a pair of busses a test instrument is connected. Knowing the average voltage of the battery cells in the string, the voltage from one of the busses to the side furthest from that bus of the cell of interest is measured, and that measured voltage is compared with a voltage range calculated as a multiple of the average voltage.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: February 19, 2008
    Assignee: BTECH, Inc.
    Inventor: Edward M. Potempa
  • Patent number: RE40223
    Abstract: A method for charging a secondary battery by measuring the static/open circuit voltage and comparing it to a predetermined value includes: a first step of precharging the secondary battery; thereafter pausing a predetermined interval; a step of measuring a secondary battery voltage Vba1 after performing the pausing; and a step of charging the secondary battery based on the measurement of the secondary battery voltage Vba1.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: April 8, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kiichi Koike, Harumi Murochi, Masahito Ishiwata, Hiroyuki Jimbo, Norio Saito