Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Application No. | Application Title | Issue Date |
| 20100264879 | Battery Chargers, Electrical Systems, and Rechargeable Battery Charging Methods Battery chargers, electrical systems, and rechargeable battery charging methods are described. According to one aspect, a battery charger includes charge circuitry configured to apply a plurality of main charging pulses of electrical energy to a plurality of rechargeabl... | 10/21/2010 |
| 20100066309 | Method for pulsed charging of a battery in an autonomous system comprising a supercapacitance The autonomous system comprises an intermittent power source delivering a direct current. A supercapacitance is connected in parallel with the battery and the power source respectively via a first switch and a second switch. Charging of the battery comprises pulsed curr... | 03/18/2010 |
| 20090256521 | Charging control device A charging control device includes a control unit and a monitoring unit. The control unit performs at least one of controlling charging to a rechargeable battery and monitoring a state of a rechargeable battery, while outputting a state signal which indicates an operati... | 10/15/2009 |
| 20090251106 | NON-ISOLATED CHARGER WITH BI-POLAR INPUTS Systems and methods are provided for an uninterruptable power supply having a positive DC bus, a neutral DC bus, and a negative DC bus. The uninterruptible power supply includes a battery charger circuit having an inductor, a first charger output, and a second charger o... | 10/08/2009 |
| 20090009141 | System and method for battery charging A charging circuit includes a pulse generator and a controller coupled to the pulse generator. The pulse generator is used to generate a plurality of pulses to control a charging switch. The controller is used to control a pulse density of the plurality of pulses. A cha... | 01/08/2009 |
| 20080197811 | Circuits and methods for battery charging Circuits and methods for battery charging are disclosed. In one embodiment, the battery charging circuit comprises an AC to DC converter, a charging control switch, and a charger controller. The AC to DC converter provides a charging power to a battery pack. The chargin... | 08/21/2008 |
| 20080191665 | CHARGING CIRCUIT A charging circuit is provided. In the present invention, a capacitor and a resistor are added to the circuit near the charging switch. Due to the electrical charges stored in the capacitor, the rising and decreasing rate of the battery voltage of a rechargeable battery... | 08/14/2008 |
| 20080129250 | Circuits and related methods for charging a battery An aspect of the present invention provides a circuit for generating a voltage that can be used to recharge a battery. The circuit includes an inductive voltage generator operable to generate a magnetic field when the voltage generator is energized by power, and operabl... | 06/05/2008 |
| 20080088281 | System and method for battery charging A battery charging device includes (i) a first circuit receiving a pulse width modulated signal, (ii) a second circuit receiving the pulse width modulated signal, and (iii) a third circuit receiving the pulse width modulated signal. The first circuit generates a first i... | 04/17/2008 |
| 20080079397 | Method and apparatus to provide battery rejuvenation at or near resonance A system and method adapted to rejuvenate batteries at or near the resonant frequency of the battery. The present invention takes a battery and applies a modulated current charging signal to increase battery performance. A resonant signal is adapted to re-train and adju... | 04/03/2008 |
| 20080048622 | Method and apparatus to determine battery resonance A system and method to determine a resonant frequency of a battery is presented. One embodiment of the invention utilizes a PLL, digital or analog, to adjust the phase angle of a modulated current charging signal to that of the resonant frequency of the battery. A secon... | 02/28/2008 |
| 20080007226 | Charger circuit and PWM controller thereof A PWM controller includes a short circuit mode circuit which has input ends connecting simultaneously to a power supply input end and an output end of an output driving circuit, and an oscillator which has a temperature compensation circuit that includes a medium value ... | 01/10/2008 |
| 20070216370 | Charging circuit An exemplary charging circuit (200) includes for charging a load component (210) includes a power supply unit (220), a feedback circuit, and a sampling resistor (230). The power supply unit includes a pulse width modulation circuit (221 | 09/20/2007 |
| 20070096696 | System and method for charging a battery A system and method for producing electrochemical conversion in an electrochemical device comprises a power converter, for example, a resonant circuit, connected to the electrochemical device and a triggering circuit connected to the power converter. The triggering circ... | 05/03/2007 |
| 20060158156 | Method and apparatus for charging and discharging a rechargeable battery A battery protection system is provided for a rechargeable battery. The system has a switch module that selectively interrupts battery current based on a control signal, a battery voltage sensor that senses battery voltage, a battery temperature sensor that generates a ... | 07/20/2006 |
| 20060139011 | 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 the... | 06/29/2006 |
| 20060132096 | Methods at a battery charger A method for charging a battery at a battery charger comprising connection means for connection to the terminals of a battery to be charged, means for detecting a voltage over the terminals of a connected battery, and control means. The method comprises the steps of ini... | 06/22/2006 |
| 20060125449 | Duty cycle controller for high power factor battery charger A duty cycle controller apparatus for producing a duty cycle signal for controlling switching of switches of a battery charger having an AC input for receiving power and an output for supplying power to charge a battery in response to switching of the switches, while ma... | 06/15/2006 |
| 20060108985 | Protection method of dynamically adjusting charging current The present invention is to provide a protection method of dynamically adjusting a charging current for resolving problems of overcurrent-charging phenomenon and instability of supplying power for a system, in which a keyboard controller is applied to read the magnitude... | 05/25/2006 |
| 20060103350 | [AN EQUALIZING-CHARGE CHARGER] Disclosed is an equalizing-charge charger includes a microprocessor, a pulse width modulator, battery cells, and equalizing charge load-control switches corresponding to the battery cells. When voltage sensors of the microprocessor detected the saturated status of one b... | 05/18/2006 |
| 20060071644 | Systems and methods for signal generation using limited power A signal generator provides an output signal having a series of pulses and a pulse repetition rate. The signal generator includes an energy storage circuit and a switch control circuit. The energy storage circuit includes a switch operated by the switch control circuit.... | 04/06/2006 |
| 20060033476 | Method and apparatus for charging batteries with energy storage According to a first aspect of the invention a battery charger and method of charging a battery includes an input circuit that receive an ac input having a period of T seconds and provides a dc signal. A converter receives the first dc signal and provides a converter ou... | 02/16/2006 |
| 20050275381 | Battery charger with dual use microprocessor A battery charger with a discrete switched regulator provides relatively high efficiency and relatively low cost. Unlike known battery chargers which incorporate switched regulator ICs, the battery charger in accordance with the present invention utilizes the microproce... | 12/15/2005 |
| 20050248320 | Switch reduction in a cordless power tool A battery pack may include at least one battery cell, a discharge switch coupled to the at least one battery cell, and monitoring and control circuitry responsive to a position of a trigger of an associated cordless power tool to provide a control signal to the discharg... | 11/10/2005 |
| 20050225299 | Rapid battery charging method and apparatus Methods and apparatus for battery charging provide a charging cycle in which charging periods are separated by intervals. The intervals may include discharging periods. Typical charging sequences for nickel-metal hydride and nickel-cadmium batteries include charging per... | 10/13/2005 |
| 20050225300 | Device for a battery charger A device for reducing the output current of a primary switched battery charger, which charger includes an input DC power circuit, a high frequency transformer and control unit for modulating the DC input power. The device includes elements for measuring pulse ratio of s... | 10/13/2005 |
| 20050194938 | Rechargeable battery charging method and apparatus A method and an apparatus for charging a lithium-ion based rechargeable battery in a short time is provided. A terminal voltage of the rechargeable battery is compared with a predetermined first set voltage V1 while charging the rechargeable battery with a consta... | 09/08/2005 |
| 20050156576 | Charging apparatus for portable computer A charging apparatus for portable computer can charge various batteries and adjust the charging current by itself. The charging apparatus has a converter, a processor, a PWM circuit connected to the converter and the processor for supplying a charging power, a battery c... | 07/21/2005 |
| 20050134231 | Charging method for rechargeable batteries and device therefor A charging method and device for a rechargeable battery to make more stable and faster full charging possible. One embodiment of a charging method for the rechargeable battery includes charging the battery by applying a constant current, and then charging the battery by... | 06/23/2005 |
| 20050110465 | Cellular telephone charging circuit using dry battery A cellular telephone charging circuit using a dry battery and capable of displaying a charging operation by a light-emitting diode (LED) when the charging operation is actually carried out is provided. The cellular telephone charging circuit using the dry battery as a p... | 05/26/2005 |
| 20050099162 | System and method for charging a battery A system and method for charging a battery is provided. The method includes applying an excitation current pulse to the battery to determine the battery type and whether the battery is capable of holding a charge. To charge the battery, a series of current pulses are ap... | 05/12/2005 |
| 20050093517 | Charging device A charging device that may perform charging with larger current is provided. A charging device comprises a switching element for increasing or decreasing charging power, a PWM controlling circuit for intermittently turning the switching element on or off, a current dete... | 05/05/2005 |
| 20050088149 | Battery saver The present invention is directed to a circuit that is housed within a battery that preserves the chemical energy within a battery when an external load is accidentally left on. The circuit comprises of a momentary switch, a relay, a timer and a terminal, wherein the ci... | 04/28/2005 |
