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7633266 |
Charger circuit and transformer used therein
The present invention discloses a transformer used in a charger circuit, in which the input side of the transformer is connected to an AC input and PWM control circuit of the charger circuit, the...
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7602151 |
Charger with output voltage compensation
A charger with output voltage compensation includes an AC/DC circuit, an output interface, a charge controller, and a compensator. The AC/DC circuit converts an AC source into a DC source. The...
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7560902 |
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...
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7554294 |
Battery health monitor
A battery health monitor (BHM) that operates as a battery-mountable full-spectrum alternating current (ac) impedance meter that facilitates monitoring a state-of-charge and a state-of-health of a...
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7545120 |
AC-DC adapter and battery charger integration for portable information handling systems
In a method and system for converting an alternating current (AC) input to a direct current (DC) output, an AC-DC adapter includes a rectifier module operable to receive the AC input and generate a...
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7535195 |
Battery charger that employs current sharing to simultaneously power an application and charge a battery
Circuitry for powering a load and charging of a battery from a power source by a smart power supply is provided. The smart power supply controls the maximum current for battery charging based in...
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7528579 |
System and method for charging batteries
A high frequency battery charger includes a converter, drive logic, and control logic. The converter transforms a DC voltage into a high frequency AC voltage. The drive logic controls a conversion...
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7511458 |
Charging apparatus
A charging apparatus includes a DC-DC converter for stepping down a charging input voltage, and a charging current controller having two input terminals and one output terminal. The input terminals...
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7504803 |
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...
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7477041 |
Battery charging method
The battery charging method uses a pulsed current alternately taking first and second amplitudes during first and second periods (t 1 , t 2 ). At least one of the parameters, amplitude and...
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7394225 |
Pseudo constant current multiple cell battery charger configured with a parallel topology
A multiple cell battery charger configured in a parallel topology provides constant current charging. The multiple cell battery charger requires fewer active components than known serial battery...
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7388348 |
Portable solar energy system
The portable solar energy system stores electrical energy generated by a solar panel, which is made of an array of photovoltaic cells, in a dc storage battery, and upon demand converts the dc...
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7339354 |
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...
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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...
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7274171 |
Charging circuit for secondary battery
A charging circuit for a secondary battery includes a constant-voltage circuit part outputting one of a plurality of predetermined constant voltages and charges the secondary battery by applying...
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7235955 |
Method and apparatus for preventing boosting system bus when charging a battery
A controllably alternating buck mode DC-DC converter conducts cycle by cycle analysis of the direction of inductor current flow to decide whether to operate in synchronous buck mode or standard...
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7227337 |
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...
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7200187 |
Modulator for digital amplifier
A digital modulator for driving a digital amplifier. The digital modulator has a subtractor which receives a digital input signal. A filter amplifier receives the output of the filter amplifier and...
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7088076 |
Power management for battery powered appliances
A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The...
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7071698 |
Power supply apparatus for detecting battery voltage and the portions of faults
A power supply apparatus according to the present invention includes a battery and a voltage detection circuit for detecting the voltage of the battery. The voltage detection circuit includes a...
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6998818 |
Charging circuit with two levels of safety
A battery charging circuit having two levels of safety protection is provided. The circuit is said to have “two levels” of safety because if any one component fails (either as a short circuit...
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6956487 |
Battery charging status indication circuit
This invention includes a circuit for displaying charge status to a user. The circuit includes circuitry for comparing a supply or reference voltage to a cell voltage, circuitry for sensing...
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6954051 |
Battery charger and charging method
The charging method includes the steps of charging a battery pack, sensing voltage of the battery pack, calculating voltage change rate, detecting a first inflection point based on the voltage...
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6906498 |
Device and method for the detection of a charging voltage
The present invention relates to a device and a method for the detection of a charging voltage of at least one rechargeable battery comprising a voltage converter for converting the charging...
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6900554 |
Circuit configuration for control of the current consumption of one or more heavy current consumption devices in a motor vehicle
In order to prevent discharge of the battery ( 3 ) of a motor vehicle during operation of heavy current consumption devices, a circuit configuration is to be prepared which comprises essentially a...
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6861823 |
Charging circuit for controlling a charging parameter of a rechargeable battery
A voltage mode battery charging system is provided that includes a battery current control section, a battery voltage control section, and a power control section. The battery current control...
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6741066 |
Power management for battery powered appliances
A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The...
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6586917 |
Battery charger shunt regulator with dual feedback control
An apparatus and method is related to a shunt regulator that includes two feedback control loops. The shunt regulator provides a charging current to a battery cell from a power source. The input...
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6400124 |
Battery charger
In a battery charger for charging a plurality of battery cells connected in series with each other with a constant current in a batch manner, the present invention is intended to suppress the...
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6344733 |
Portable jump-starting battery pack with charge monitoring system
A battery pack includes a lead-acid battery and a charger port and an electronic switch connected between the two, the switch being controlled by a microcontroller which is connected to each of the...
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6342822 |
Method and apparatus for implementing improved pulse width modulation
A method and apparatus for implementing an improved pulse width modulation circuit is disclosed. In particular, a circuit and method is provided to generate a pulse width modulated signal, wherein...
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6133712 |
Battery charge controller having an adjustable termination current
A battery charge controller has charge termination values that can be adjusted according to the initial charging current values so that charging is discontinued at a same charge level for all...
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6081197 |
Fire detector silenceable low battery pre-alarm
A method of monitoring the condition of the battery of a smoke or heat alarm so as to provide a warning of an impending low battery condition, said method including: means of providing a low...
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6031359 |
Digitally controlled switch mode power supply for charging rechargeable batteries
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6002237 |
Microcontrolled battery charger
A battery charger for fast charging batteries, such as batteries requiring constant current charging, such as lithium ion batteries. The battery charger provides charging voltages across a battery...
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5998968 |
Method and apparatus for rapidly charging and reconditioning a battery
An improved battery charger and reconditioner employs a charging sequence calling for a discharge pulse to be applied substantially immediately before a charging pulse to effectively lower the...
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5982151 |
Battery charger and battery charging method
In a battery charger, current regulating means and voltage regulating means can be prevented from damages. In the case where a loss of current regulating means (11) or voltage regulating means (12)...
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5945811 |
Pulse charging method and a charger
The present invention relates to a pulse charging method and charging system for use with non-aqueous secondary batteries, employing a pulse charge controlling method all the way from the start to...
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5889387 |
Battery charging unit
A battery charging circuit, particularly useful in a laptop computer system, includes a voltage input terminal coupled to a dc voltage. A first switch couples the voltage input terminal to an...
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5850137 |
Charging apparatus and current/voltage detector for use therein
A charging apparatus having a power supply circuit that provides a DC output current via a sense resistor. A current detector amplifies, detects and provides a voltage across the sense resistor. A...
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5838141 |
Method for generating a continuously variable reference signal for controlling battery cell charging
A power supply system, for example, for use with a portable personal computer, includes a smart battery pack and a charging system. The smart battery pack is provided with a dedicated...
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5801515 |
Method and apparatus for ultrarapidly charging a battery
A method and apparatus for ultrarapidly charging primary or secondary battery. Charging current is multiple-frequency complex pulse current which is comprised of pulse current overlapped by pulse...
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5783929 |
Apparatus and method for recharging a battery
An apparatus and method for recharging a battery. The invention includes modulating a rail voltage with a modulation signal that oscillates at a radio frequency, preferably at a frequency that...
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5783930 |
Self-oscillating buck mode battery charger
A self-oscillating buck mode battery charger apparatus 10. The apparatus 10 includes a main switching transistor 22, a first control transistor 34 and a second control transistor 36. The control...
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5774021 |
Merged transconductance amplifier
Operational transconductance amplifiers (OTAs) are combined at their outputs, yielding a single frequency compensation connection point. In a preferred embodiment, the output of each OTA is...
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5773963 |
Method and apparatus for programmably adjusting output voltage of a battery charger
An apparatus for programmably adjusting output voltage of a constant-voltage battery charger is disclosed. The present invention includes a power circuit for generating an output voltage for...
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5747969 |
Method of charging a rechargeable battery with pulses of a predetermined amount of charge
The charging method repeatedly charges and suspends charging to pulse charge a rechargeable battery. Charging is suspended only after a given amount of charge is transferred to the battery. Battery...
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5710506 |
Lead acid charger
A battery charge controller (50) is provided which includes a PWM switch controller (36) that is operable to control a switching regulator to supply current to a battery (10) in either a current...
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5708348 |
Method and apparatus for monitoring battery voltage
A battery monitoring method and apparatus for delivering current to a battery, particularly a lead-acid battery, in standby condition after it has been charged and in such a manner as to maintain...
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5698963 |
Battery charging circuit with charging rate control
A battery charging circuit controls between rapid charging and trickle charging used to charge a NiCd/NiMH battery. The circuit perceives when the rapid charging operation has completely charged...
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