With Peak Detection Of Current Or Voltage (e.g., Delta-v Or Delta-i Utilized, Etc.) Patents (Class 320/148)
  • Patent number: 8441233
    Abstract: An automated power reporting system is provided in one aspect. The system includes one or more devices that can report or transmit power status information over a bus or network. A protocol component utilizes a generalized protocol to process or convert the power status information over the network in order to facilitate power management operations for a plurality of devices. In this manner, devices that send power information can interact and exploit personal computing resources in order to better help users manage limited power resources for their respective devices.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: May 14, 2013
    Assignee: Microsoft Corporation
    Inventors: Firdosh K. Bhesania, Randall E. Aull
  • Patent number: 8441232
    Abstract: The electronic apparatus allows a user to arbitrarily set a display of a remaining battery level. The apparatus includes a detector which detects a remaining battery level of a battery, and a threshold-value-setting part which is operated by a user to set a threshold value for performing a display relating to the remaining battery level. The apparatus further includes a controller which displays in a display device an image representing the remaining battery level in accordance with the result of a comparison between the remaining battery level detected by the detector and the threshold value set with the threshold-value-setting part.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: May 14, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiromi Hayasaki
  • Patent number: 8436575
    Abstract: A battery identification (ID) setting system effectively managing a plurality of batteries and a method of driving the same. The battery ID setting system having an external terminal includes a master battery management system (BMS) outputting ID setting signals, and a plurality of slave BMSs transmitting battery information signals containing absolute battery IDs and battery potential differences of batteries to the master BMS in response to the ID setting signals. The master BMS receives the battery information signals to assign and store the relative battery IDs corresponding to the absolute battery IDs of the batteries.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: May 7, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sesub Sim, Segawa Susumu, Jongwoon Yang, Jinwan Kim
  • Patent number: 8433938
    Abstract: A computer system includes a device which operates depending on a clock frequency; a battery unit which comprises a plurality of battery cells and supplies power to the device; a temperature sensor which senses temperature of the battery cells; and a controller which decreases the clock frequency if the sensed temperature is beyond a first preset critical point.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: April 30, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-deok Cha, Jong-tae Chun
  • Patent number: 8427112
    Abstract: The present inventions, in one aspect, are directed to techniques and/or circuitry to determine the state of charge of a battery/cell using data which is representative of an overpotential of the battery/cell. In yet another aspect the present inventions are directed to techniques and/or circuitry to adaptively charge a battery/cell using data which is representative of a state of charge of the battery/cell and/or the data which is representative of an overpotential of the battery/cell.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: April 23, 2013
    Assignee: Qnovo Inc.
    Inventors: Dania Ghantous, Fred Berkowitz, Nadim Maluf
  • Patent number: 8415929
    Abstract: An example battery charging circuit includes a rectifier circuit for rectifying a three-phase AC voltage outputted from an electric power generator and generating a charge voltage for charging a battery. A voltage detection circuit detects that the voltage of the battery exceeds a predetermined voltage. A switching circuit, in an off-state, charges the battery through the rectifying circuit and, in an on-state, short-circuits the electric power generator through the rectifier circuit. A switch control circuit brings the switching circuit into the on-state, when it is detected by the voltage detection circuit that the voltage of the battery exceeds the predetermined voltage. A control circuit allows the switch control circuit to subsequently perform a control for bringing the switching circuit into the off-state.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: April 9, 2013
    Assignee: Shindengen Electric Manufacturing
    Inventor: Makoto Tabuta
  • Patent number: 8415926
    Abstract: Some embodiments provide a system that monitors a battery in a portable electronic device. During operation, the system applies a pulse load to the battery and determines an impedance of the battery by measuring a voltage of the battery during the pulse load. Next, the system assesses a health of the battery based on the impedance. Finally, the system uses the assessed health to manage use of the battery in the portable electronic device.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: April 9, 2013
    Assignee: Apple Inc.
    Inventors: Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
  • Patent number: 8405356
    Abstract: A full charge capacity value correction circuit includes: a current detection portion which detects a current value in a secondary battery; a voltage detection portion which detects a terminal voltage value of the secondary battery; a capacity storage portion which stores a full charge capacity value of the secondary battery; a remaining quantity calculation portion which calculates a remaining charging quantity in the secondary battery a remaining quantity estimation portion which estimates a remaining quantity of the secondary battery and a full charge capacity value correction portion which, when an estimated remaining quantity becomes equal to a reference value set in advance, adds a difference electrical quantity, to the full charge capacity value stored in the capacity storage portion, or subtracts the difference electrical quantity from the full charge capacity value stored in the capacity storage portion based on an estimated remaining quantity and an accumulated remaining quantity.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: March 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Masato Nakayama, Toshiyuki Nakatsuji, Hisashi Kameyama
  • Patent number: 8405359
    Abstract: Provided are a battery protection IC adaptable to any number of batteries connected in series without increasing a breakdown voltage thereof, and a battery device including the battery protection IC mounted thereon. A charge control signal input terminal and a discharge control signal input terminal of one battery protection IC are provided with a clamp circuit (121), and hence an output driver (112) of another battery protection IC connected to those terminals is not applied with a voltage equal to or higher than a breakdown voltage. Accordingly, the breakdown voltage of the battery protection IC is not required to be high.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: March 26, 2013
    Assignee: Seiko Instruments Inc.
    Inventors: Yoshihisa Tange, Atsushi Sakurai, Takakazu Ozawa, Kiyoshi Yoshikawa
  • Publication number: 20130069565
    Abstract: A circuit for a small electric appliance is disclosed. The circuit includes a battery (B); a control circuit (uC) for measuring the charging current of the battery (B); a DC-DC converter (DC/DC) which supplies the control circuit (uC) from the battery; and a current sensing resistor (R1), whose one end lies at a reference potential and whose other end is connected to the battery (B). The control circuit (uC) has a terminal which is at reference potential, and a measurement input which is related to the reference potential.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 21, 2013
    Applicant: Braun Gmbh
    Inventors: Torsten Klemm, Leo Faranda, Kervin Heinrich Küchler
  • Publication number: 20130057222
    Abstract: A hybrid battery and its charging/discharging method automatically charges/discharges batteries having different capacities. The hybrid battery includes a plurality of rechargeable batteries; switching elements which are electrically connected to the plurality of rechargeable batteries having high current paths for electrically connecting to one of the high current paths; and a hybrid battery protection circuit electrically connected to the plurality of rechargeable batteries and driven by power supplied by one of the plurality of rechargeable batteries, the hybrid battery protection circuit charging/discharging the plurality of rechargeable batteries in sequence by transmitting an on/off signal to the switching element.
    Type: Application
    Filed: November 5, 2012
    Publication date: March 7, 2013
    Applicant: SAMSUNG SDI CO., LTD.
    Inventor: SAMSUNG SDI CO., LTD.
  • Publication number: 20130049701
    Abstract: Embodiments of the present invention generally comprise devices and methods for optimizing rechargeable battery life. One or more embodiments of the invention comprise a device for interrupting the charging status of a rechargeable battery, comprising: a plug, an outlet, a switch, and a controller for controlling the switch state dependent on at least one of: amount of time the switch is in the open state, and amount of time the switch is in the closed state.
    Type: Application
    Filed: August 21, 2012
    Publication date: February 28, 2013
    Applicant: PERUMALA CORPORATION
    Inventor: Madhavan Pisharodi
  • Publication number: 20130049700
    Abstract: Apparatus for disconnecting a charger or a device incorporating a charger for a rechargeable battery from the power source either after charging is complete or after a pre-set time interval to minimize damage to the battery. The apparatus includes a plug in an enclosure for plugging into a power source or other power outlet, the enclosure being provided with an outlet for receiving a power cable from the battery charger or the device including the rechargeable battery. Circuitry is provided in the enclosure for switching off the power supplied to the charger or the device including the battery upon receipt of a signal from the device or after a pre-set time interval has elapsed.
    Type: Application
    Filed: August 30, 2011
    Publication date: February 28, 2013
    Inventor: Madhavan Pisharodi
  • Patent number: 8384354
    Abstract: A sensor arrangement and method that may be used with a variety of different energy storage devices, including battery packs found in hybrid vehicles, battery electric vehicles, and other types of vehicles. An exemplary sensor arrangement includes a number of sensor units, a controller, and several connections, wherein two or more sensor units are coupled to each node of the battery pack and are coupled to the controller over different connections. An exemplary method is divided into two aspects: an error detection aspect and an error resolution aspect. Because the sensor arrangement provides multiple sensor readings for each node being evaluated, the method can enable the sensor arrangement to continue operating accurately and with redundancy even if it experiences a loss of one or more sensor units.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: February 26, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Andrew K. Chandler, Andrew H. Leutheuser, Willard A. Blevins, Larry J. Yount
  • Patent number: 8368356
    Abstract: A battery pack detachably connectable to an equipment body to supply power to the equipment body, the battery pack including a battery cell, a microcomputer for communicating with the equipment body, a connection terminal connected to the microcomputer, a positive power supply input terminal connected to a cathode of the battery cell; and a negative power supply input terminal connected to an anode of the battery cell. After the power of the equipment body is turned on, the microcomputer alternately sends to the equipment body by serial communication via the connection terminal information to be used in authentication processing executed by the equipment body and information to be used in a battery residual quantity count executed by the equipment body. After the authentication processing is complete, the microcomputer sends to the equipment body information to be used in updating the battery residual quantity count executed by the equipment body.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: February 5, 2013
    Assignee: Sony Corporation
    Inventors: Ryoichi Nakashima, Hideyuki Sato, Yukio Tsuchiya, Kazuyasu Nawa
  • Patent number: 8350531
    Abstract: A secondary battery charge control method includes: a charge control step of executing charging by supplying a charge current to a secondary battery; a charge information acquisition step of acquiring information relating to the charging executed in the charge control step; a storage step of storing the information acquired in the charge information acquisition step as charge data; and a charge inhibition determination step of determining whether to inhibit the charging in the charge control step on the basis of the charge data of a previous cycle that have been stored in the storage step when charging in the charge control step is started again after charging in the charge control step has been completed.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: January 8, 2013
    Assignee: Panasonic Corporation
    Inventors: Naohisa Morimoto, Toshihiro Inoue
  • Patent number: 8339095
    Abstract: A charging device capable of appropriately grasping the charged state of a battery pack using data stored in a memory of the battery pack even when the battery pack becomes commercial as a new product. A charging device determines charged state data indicative of a charged state of a battery pack mounted thereon based on a charging current supplied and/or a charging voltage applied to the battery pack. A charge control microcomputer reads charging characteristics data from a memory of the battery pack, and generates a data table associating at least one of the charging current supplied and the charging voltage applied to the battery pack and the charged state data with each other, based on the charging characteristics data read out. The microcomputer determines charged state data indicative of a charged state of the battery pack, based on the generated data table.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: December 25, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Isao Hayashi
  • Patent number: 8330427
    Abstract: A charge control circuit including a voltage detection section which detects a terminal voltage of a secondary battery; a primary charge processing section which performs a charge processing of acquiring, as a first terminal voltage, a terminal voltage detected by the voltage detection section while causing a charging section to charge the secondary battery; a charging suspend voltage acquiring section which causes the charging section to suspend the charge after the first terminal voltage has been acquired by the primary charge processing section, and acquires, as a second terminal voltage, a terminal voltage detected by the voltage detection section in a state that the charge is suspended; and a charging end determining section which determines whether or not the charge of the secondary battery is to be terminated.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: December 11, 2012
    Assignee: Panasonic Corporation
    Inventors: Akihiro Taniguchi, Takuma Iida, Takuya Nakashima
  • Patent number: 8330413
    Abstract: A method and apparatus of determining the state of charge and charging Li-ion batteries while the batteries remain floating on the direct current (DC) bus without the need for a dedicated charger is described. The system includes a battery, a DC generator and a converter, each electrically connected to a DC bus. A charging control algorithm may be used to monitor and control the charging current supplied to the battery. The voltage on the DC bus may be varied to help control the charging current supplied to the battery, based on the battery's internal impedance and the battery's state of charge.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: December 11, 2012
    Assignee: Honeywell International Inc.
    Inventors: David Lazarovich, Ileana Rusan, Rodney Michalko
  • Patent number: 8319476
    Abstract: Provided are a battery state monitoring circuit and a battery device which can be readily adapted to variation in number of batteries, and has low withstand voltage and a simple circuit configuration.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: November 27, 2012
    Assignee: Seiko Instruments Inc.
    Inventors: Atsushi Sakurai, Kazuaki Sano
  • Patent number: 8305045
    Abstract: A charge control circuit having a charge controller, a voltage detector, and a current detector is provided. The charge controller repeats the constant current constant voltage charge a plurality of times. In doing so, the charge controller supplies a charging current of a predetermined set current value from the charger to the secondary battery. This causes the charger to execute constant current charge when the terminal voltage detected by the voltage detector becomes equal to a predetermined threshold voltage value during the execution of the constant current charge. In turn, the charger executes a constant voltage charge by supplying a charging voltage of the threshold voltage value from the charger to the secondary battery until a current value detected by the current detector becomes equal to a predetermined threshold current value.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: November 6, 2012
    Assignee: Panasonic Corporation
    Inventor: Kazuya Maeagawa
  • Publication number: 20120268068
    Abstract: A battery control apparatus includes an emergency charging unit including an external charging terminal for applying power to a main battery pack, a first voltage measurement unit for measuring the voltage of the external charging terminal, and an emergency charging switch for switching the connection between the external charging terminal and the main battery pack; an auxiliary battery connection unit including an auxiliary battery connection terminal for applying power to the vehicle through a contactor, a second voltage measurement unit for measuring the voltage of the auxiliary battery connection terminal, and an auxiliary battery switch for switching the connection between the auxiliary battery connection terminal and the contactor; and an emergency control unit for switching to an emergency charging mode or an auxiliary connection mode by turning on the emergency charging switch or the auxiliary battery switch during the voltage measurement of the first or second voltage measurement unit.
    Type: Application
    Filed: July 3, 2012
    Publication date: October 25, 2012
    Inventors: Chang-Gi JUNG, Hyung-Ju AHN
  • Publication number: 20120256598
    Abstract: A battery pack detection circuit that can detect cold or false welding, charging status, and discharging status is disclosed. The battery pack detection circuit comprises a driving circuit electrically connected to a switch unit outside the battery pack detection circuit; a voltage detection and comparison circuit electrically connected to a multi-cell battery pack having a plurality of battery cells outside the battery pack detection circuit, wherein the voltage detection and comparison circuit is configured to detect cell voltages across each of the battery cells under at least two circuit connection conditions and compare the differences in cell voltage with a predetermined value, wherein the differences in cell voltage are derived from a subtraction operation performed on the cell voltages measured under the at least two circuit connection conditions; and an interface and control unit configured to receive commands from a SMBUS and provide a signal to a detection load.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 11, 2012
    Applicant: NEOTEC SEMICONDUCTOR LTD.
    Inventors: Hung An HSU, Hui Te Hsu
  • Patent number: 8274291
    Abstract: When a battery current is not larger than a limit current set depending on the battery temperature and is flowing continuously for a predetermined time set depending on the battery temperature or longer, a decision is made that a secondary battery is in stable state. When the secondary battery is in stabilized state, the battery voltage is considered to be equal to the open circuit voltage and SOC estimation is performed based on the open circuit voltage-SOC characteristics. When the product of the internal resistance of the secondary battery and the limit current is made substantially constant (constant voltage) by setting the limit current in association with temperature dependence of the internal resistance, estimation error can be kept within a predetermined range in the stabilized state even if SOC estimation is performed while the battery voltage is assumed as the open circuit voltage.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: September 25, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kenji Tsuchiya
  • Patent number: 8253579
    Abstract: A portable system includes a portable device and a power adapter to supply power to the portable device. The portable device includes a rechargeable battery and a measurement chip to measure charge remaining in the rechargeable battery. The power adapter includes a transmission line, a microprocessor, and a display unit. The microprocessor receives the readout of the amount of charge remaining in the rechargeable battery from the measurement chip via the transmission line, and generates a display signal according to the charge remaining. The display unit displays the charging progress of the rechargeable battery according to the display signal received from the microprocessor.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: August 28, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Hsin-Yen Liu
  • Publication number: 20120212057
    Abstract: A portable device operated by a rechargeable battery includes a connecting unit that connects the portable device and a power supply that supplies a driving current and a charging current; a detection unit that detects a battery voltage of the rechargeable battery; and a charging control unit that controls starting and stopping of charging of the rechargeable battery. When the battery voltage is greater than a predetermined threshold value, the charging control unit causes the power supply to stop supplying the charging current until the battery voltage becomes less than the predetermined threshold value. When the battery voltage is less than the predetermined threshold value, the charging control unit causes the power supply to start supplying the charging current until the rechargeable battery is fully charged.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 23, 2012
    Inventor: Takafumi OKUMA
  • Patent number: 8248036
    Abstract: A battery charging circuit for charging a rechargeable battery and improving operating stability includes a plurality of resistors for generating a first voltage; a first reference voltage source for providing a first reference voltage; an error amplifier for generating a second voltage according to the voltage difference between the first reference voltage and the first voltage; a second reference voltage source for providing a second reference voltage; a modulator for generating a control voltage according to the second reference voltage and the second voltage; a voltage-to-current control unit for generating a control current according to the control voltage; and a current mirror for generating an output current which is equal to a multiple of the control current, wherein the output current and its corresponding output voltage is applied to charge the rechargeable battery.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: August 21, 2012
    Assignee: Anpec Electronics Corporation
    Inventors: Kang Sheng, Zong-Yu Wu
  • Patent number: 8242748
    Abstract: A method and integrated circuit for preserving a battery's charge and protecting electrical devices is disclosed. A maximum and a minimum battery voltage value at the output port are stored in a memory. A steady state battery voltage at the output port is measured and stored in the memory. A processor compares the measured steady battery voltage value to the maximum and the minimum battery voltage values. If the measured steady state battery voltage value is greater than the maximum battery voltage value, an over voltage state is reported by the processor. If the measured steady state battery voltage value is less than the minimum battery voltage value, a low battery voltage state is reported by the processor.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: August 14, 2012
    Assignee: STMicroelectronics, Inc.
    Inventors: Gary J. Burlak, Marian Mirowski
  • Patent number: 8232773
    Abstract: An over voltage transient controller to protect a rechargeable battery from an over voltage transient condition. The over voltage transient controller may comprise a comparator to compare a first signal with a second signal representative of a reference voltage level and to provide an output signal representative of an over voltage transient condition to a switch if the first signal is greater than or equal to the second signal. The switch is responsive to the output signal to protect the rechargeable battery from the over voltage transient condition. The over voltage transient controller may further comprise a DAC, wherein the second signal is based, at least in part, on an output of the DAC. An apparatus comprising a charge switch and such an over voltage transient controller is also provided.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: July 31, 2012
    Assignee: O2Micro, Inc.
    Inventors: Bruce Denning, Guoxing Li, Liusheng Liu
  • Patent number: 8232762
    Abstract: A computer includes a system part which has at least one electronic component, a power supplying part which supplies a main electric power to the system part, a battery part which receives charging electric power from the power supplying part and supplies auxiliary electric power to the system part, and a controlling part which, if the main electric power is supplied by the power supplying part, and if charge level of the battery part according to supply of the charging electric power exceeds a reference level corresponding to a discharged state, cuts off the supply of the charging electric power and controls the battery part to discharge the auxiliary electric power.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: July 31, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chong Kyu Yun
  • Publication number: 20120161702
    Abstract: Disclosed are a charging apparatus and a charging method for a battery of an electric vehicle. The charging apparatus for a battery of an electric vehicle includes: a communication module that communicates power information and information on a battery of the electric vehicle; a charging mode setting module that receives a user's order; a charging switch that connects the battery of the electric vehicle with the charging power in accordance with an input control signal; and a charging control module that sets the charging amount of the battery by using the power information and the information on the battery, sets charging information including charging power and at least one time period for charging the battery of the electric vehicle within a predetermined time range, and input the control signal to the charging switch on the basis of the charging information.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 28, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventor: Ki Seok KIM
  • Publication number: 20120153903
    Abstract: A protector that protects a rectifier, and a wireless power receiver including the protector are provided. In one embodiment, a protector for an electronic device may include: a switch configured to control current flow to a rectifier of the electronic device; and a switch controller configured to: compare, with a predetermined threshold value, a voltage difference between an output voltage of the rectifier and a voltage of the electronic device; and transmit a control signal to the switch (i) to discontinue current flow to the rectifier when the voltage difference is greater than the predetermined threshold value, and (ii) to enable current flow to rectifier when the voltage difference is less than or equal to the predetermined threshold value.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 21, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong Zo KIM, Sang Wook KWON, Yun Kwon PARK, Eun Seok PARK, Young Tack HONG, Ki Young KIM, Young Ho RYU, Nam Yun KIM, Jin Sung CHOI
  • Publication number: 20120153902
    Abstract: A system implements a first charging method or a second charging method during one or more charge cycles of a battery. The first charging method includes a first voltage charging level and the second charging method includes a second voltage charging level that is higher than the first charging level.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 21, 2012
    Inventors: Bouziane Yebka, Joseph Anthony Holung, Tin-Lup Wong, Jeremy Robert Carlson, Kenneth Scott Seethaler
  • Patent number: 8198867
    Abstract: A method and a charger for auxiliarily charging a secondary battery to a desired SOC with high accuracy. A charger for a secondary battery includes a charge termination condition storing unit which stores a relationship between open circuit voltages OCV of a plurality of secondary batteries and an amount of change of terminal voltage ?V until a desired state of charge SOC is reached, which is previously created. A target terminal voltage Vmap at the time of the auxiliary charge is calculated by adding the amount of change of terminal voltage ?V corresponding to the open circuit voltage OCV of a secondary battery to be auxiliarily charged to the open circuit voltage OCV which is measured. A terminal voltage Vb of the secondary battery at the time of auxiliary charge and the target terminal voltage Vmap are compared to each other by a comparison unit, and when the target terminal voltage Vmap is reached, auxiliary charge is terminated.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: June 12, 2012
    Assignee: Panasonic EV Energy Co., Ltd.
    Inventor: Masayoshi Toyota
  • Patent number: 8198865
    Abstract: A method and integrated circuit for preserving a battery's charge and protecting electrical devices is disclosed. A maximum and a minimum battery voltage value at the output port are stored in a memory. A steady state battery voltage at the output port is measured and stored in the memory. A processor compares the measured steady battery voltage value to the maximum and the minimum battery voltage values. If the measured steady state battery voltage value is greater than the maximum battery voltage value, an over voltage state is reported by the processor. If the measured steady state battery voltage value is less than the minimum battery voltage value, a low battery voltage state is reported by the processor.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: June 12, 2012
    Assignee: STMicroelectronics, Inc.
    Inventors: Marian Mirowski, Gary J. Burlak
  • Patent number: 8179100
    Abstract: A technique for dynamically adjusting an output voltage of forward converter circuits for a battery charging operation is provided. The technique allows for varying voltage at the charging battery by manipulating the duty cycles of two forward converter circuits. Method and systems allow for increasing synchronized duty cycles in a pair of forward converter circuits in response to a changing battery charge state that requires a higher voltage output then changing a phase shift between the duty cycles in response to further increases in output voltage demand. The methods and systems also allow for setting a phase shift between duty cycles in a pair of forward converter circuits based on battery rating and then altering pulse width in response to changing battery charge state.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: May 15, 2012
    Assignee: Illinois Tool Works Inc.
    Inventor: Bernard J. Vogel
  • Patent number: 8164469
    Abstract: A method for cooling a battery after a charging phase including the steps of providing a user display, identifying a starting point at which the charging phase of the battery transitions to a cooling phase, when the starting point is identified, instructing the user display to provide a first indication for a first predetermined amount of time, and after the first predetermined amount of time has elapsed, instructing the user display to provide a second indication.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: April 24, 2012
    Assignee: Canadus Power Systems, LLC
    Inventor: Roger Altman
  • Publication number: 20120091969
    Abstract: A PM-ECU executes a program including: a step (S104) of estimating pre-charge SOC(1) when a plug-in charge is started (YES in S100), a step (S108) of calculating an integrated value of charging current when integration permitting conditions are satisfied (YES in S104, YES in S106), a step (S112) of setting a final integrated value when the charge is completed, a step (S116) of estimating post-charge SOC(2) when an ignition switch is turned on (YES in S114), a step (S122) of calculating a full-charge capacity of this cycle when calculation conditions are satisfied (YES in S120), a step (S128) of calculating a new full-charge capacity when the full-charge capacity of this cycle is within a specified range (YES in S124), and a step (S130) of updating the full-charge capacity by setting the new full-charge capacity as the current full-charge capacity when the new full-charge capacity is within a specified range (YES in S128).
    Type: Application
    Filed: June 23, 2010
    Publication date: April 19, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Junta Izumi
  • Patent number: 8159179
    Abstract: In the battery charging device of the present invention, a U, V, W phase voltage generating circuit detects a voltage signal of a U phase sub-coil of a three-phase alternating current generator, and generates a signal of a triangular wave that is in synchronization with the U phase. Moreover, a first triangular wave is generated in synchronization with a phase from 0° to 180° of the U phase rectangular wave, and a second triangular wave is generated in synchronization with a phase from 180° to 360° of the U phase.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: April 17, 2012
    Assignees: Shindengen Electric Manufacturing Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
  • Patent number: 8159180
    Abstract: A battery charging device of the present invention has a rectifier portion that is formed by switching elements, and performs advance angle/delay angle control. An advance angle/delay angle amount in the advance angle/delay angle control is determined based on a differential voltage between the voltage of a battery and a predetermined target voltage. In this case, when a determined delay angle amount exceeds a delay angle limit value, delay angle control is performed using the delay angle limit value. Moreover, the power generation amount of an alternating current generator is detected, and the delay angle amount and power generation amount are stored. If the current delay angle amount is greater than the previous delay angle amount, and the previous power generation amount is greater than the current power generation amount, then the previous delay angle amount is set as the delay angle limit value.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: April 17, 2012
    Assignees: Shindengen Electric Manufacturing Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
  • Patent number: 8143863
    Abstract: A circuit for controlling a current flowing through a battery includes a driver and a filter coupled to the driver. The driver can generate a pulse signal in a first operating mode and generate a first signal in a second operating mode to control the current through the battery. The filter can filter the pulse signal to provide a filtered DC signal to adjust an on-resistance of a switch in series with the battery based on a duty cycle of the pulse signal in the first operating mode. The filter can receive the first signal and provide a second signal to drive the switch in a linear region in the second operating mode.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: March 27, 2012
    Assignee: O2Micro, Inc
    Inventor: Guoxing Li
  • Patent number: 8138723
    Abstract: In a remote battery charging system comprising a charging circuit there is always a voltage loss due to inherent resistances in the system from such things as connectors and conductors. These resistances create voltages losses in the system such that charging time are increased substantially. The present invention compensates for voltage losses on the system by generating a dynamic adjustment voltage over the charging period. A voltage translator circuit is used to measure charging circuit output voltage and current over a plurality of incremental time periods during the charging period an calculate a signal proportional to changes in output voltage and current over the incremental time period. The signal is then applied to the charging circuit to offset any voltage losses.
    Type: Grant
    Filed: May 26, 2008
    Date of Patent: March 20, 2012
    Inventor: Steve Carkner
  • Patent number: 8134339
    Abstract: A method and integrated circuit for preserving a battery's charge and protecting electrical devices is disclosed. A maximum and a minimum battery voltage value at the output port are stored in a memory. A steady state battery voltage at the output port is measured and stored in the memory. A processor compares the measured steady battery voltage value to the maximum and the minimum battery voltage values. If the measured steady state battery voltage value is greater than the maximum battery voltage value, an over voltage state is reported by the processor. If the measured steady state battery voltage value is less than the minimum battery voltage value, a low battery voltage state is reported by the processor.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: March 13, 2012
    Assignee: STMicroelectronics, Inc.
    Inventors: Gary Joseph Burlak, Marian Mirowski
  • Patent number: 8108695
    Abstract: A system is disclosed for reducing power drain of a component when the component is in a powered down state. The system comprises a power input configured to receive power, a power output to the component, monitor logic configured to monitor a level of power moving between the input and output, and control logic configured to control power transfer between the input and output. The control logic may be in communication with the monitor logic and configured to selectively restrict power flow between the input and output when the monitor logic senses that power flow between the input and output falls below a threshold level. A method comprises checking a power level between the input and output, and if the power level exceeds a threshold, then permitting substantially unrestricted power flow. If the power level is less than the threshold, then restricting the power level between the input and output.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: January 31, 2012
    Assignee: Gateway, Inc.
    Inventor: John Love
  • Patent number: 8103485
    Abstract: A system and a method for computing an estimated state of charge and an estimated cell resistance of an electrochemical cell are provided. The method includes predicting a first cell resistance value indicating a present resistance of the electrochemical cell utilizing a first nonlinear cell model. The method further includes predicting a first state of charge value indicating a present state of charge of the electrochemical cell utilizing a second nonlinear cell model. The method further includes measuring a voltage and, a current associated with the electrochemical cell to obtain a voltage value and a current value, respectively. The method further includes estimating a second state of charge value indicating the present state of charge of the electrochemical cell utilizing the second nonlinear cell model based on the first state of charge value, the first cell resistance value, the voltage value, and the current value.
    Type: Grant
    Filed: November 11, 2004
    Date of Patent: January 24, 2012
    Assignee: LG Chem, Ltd.
    Inventor: Gregory L. Plett
  • Patent number: 8098052
    Abstract: A batter charger for charging a secondary batter using a power supply circuit which converts an AC input into a DC output, includes a first resistor for detecting constant-current control and a second resistor for detecting end of charging. The first resister and the second register are inserted in series in a current path of the charging current. The power supply circuit has output characteristics of a constant-current control characteristic and a constant-voltage control characteristic. The constant-current control is performed using a first detection voltage generated at the first resistor, and the constant-voltage control is performed by comparing a second detection voltage generated at a series resistor composed of the first resistor and the second resistor with a reference voltage using a comparator, and detecting an end of charging indicated by the second detection voltage fallen below the reference voltage.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: January 17, 2012
    Assignee: Sony Corporation
    Inventor: Koji Umetsu
  • Patent number: 8098051
    Abstract: A protection circuit for a battery pack, comprising: a thermistor for indicating a temperature of a cell in the battery pack; a first comparator coupled to the thermistor for determining whether the temperature has exceeded a charge cut-off temperature threshold for the cell, and if so, for turning off a first switch in series with the cell to prevent charging of the cell; and, a second comparator coupled to the thermistor for determining whether the temperature has exceeded a discharge cut-off temperature threshold for the cell, and if so, for turning off a second switch in series with the cell to prevent discharging of the cell.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: January 17, 2012
    Assignee: Research In Motion Limited
    Inventors: Siong Litingtun, Jacek S. Idzik
  • Patent number: 8084997
    Abstract: Provided is a voltage sensor module monitoring a voltage of each of a plurality of battery cells, including: first and second terminals each receiving a voltage applied between both ends of the plurality of battery cells; third and fourth terminals each receiving a voltage applied between both ends of a battery cell to be monitored which is included in the plurality of battery cells; a first reference voltage generation circuit connected to each of the first and second terminals and generating a first reference voltage based on the voltage applied between the both ends of the plurality of battery cells; and a first comparator circuit comparing a first regulated voltage generated based on a voltage applied between the third and fourth terminals, with the first reference voltage. As a result, low voltage detection can be performed with accuracy even when an output of a battery cell decreases.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: December 27, 2011
    Assignee: Renesas Electronics Corporation
    Inventor: Manabu Miyamoto
  • Patent number: 8063611
    Abstract: A DC blocking capacitor and a resistor are coupled in series, and coupled in parallel with an electricity storing section. An ON/OFF circuit and a peak voltage holding circuit are coupled in parallel with the resistor. A current sensing section is coupled in series with the storing section, with its output supplied to the peak current holding circuit. Current from a positive to a negative electrode of the storing section is referred to as a positive direction. The ON/OFF circuit is turned on when the current flows in a negative direction, and is turned off when the current flows in the positive direction. An internal resistor of the storing section is found based on a peak voltage and a peak current resulting from the control and held by the respective circuits. A degree of degradation of the electricity storing section is determined with this internal resistor.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: November 22, 2011
    Assignee: Panasonic Corporation
    Inventors: Kazuki Morita, Yoshimitu Odajima
  • Patent number: 8035347
    Abstract: A battery charger for charging a secondary battery using a power supply circuit, includes a discrimination circuit to discriminate a constant-current charging mode and a constant-voltage charging mode, and a controller to which a discrimination signal is supplied. When judged as being the constant-current charging mode, the controller sets the current in the constant-current charging mode by using the control signal. When judged as being the constant-voltage charging mode in accordance with the discrimination signal, the controller sets intermittently the end of charging detection current, and sets an end of charging detection period for judging the constant-current charging mode and the constant-voltage charging mode. When the discrimination signal indicates the constant-voltage charging mode in the end of charging detection period, the controller controls to shift to the end of charging detection mode.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: October 11, 2011
    Assignee: Sony Corporation
    Inventors: Koji Umetsu, Masanao Sato, Kazumi Sato