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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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7446510 |
Diagnosis method for state-of-health of batteries
A diagnosis method for SOH of batteries includes the steps of: providing data of discharge voltages and currents of a battery unit; setting an acceptable value of a predetermined period of time and...
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7446509 |
Intelligent battery charging system
An invention is provided for detecting polarization in a battery during battery charging. The invention includes applying a waveform to a battery, and obtaining a plurality of battery response...
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7417406 |
Electronic apparatus that determines a characteristic of a battery
An electronic apparatus which detects when a battery having a different characteristic is mixed in a plurality of batteries accommodated therein. An average voltage V 1 per battery of plural...
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7282890 |
Voltage detector of battery assembly
A voltage detector for a battery assembly having unit cells, the voltage detector includes a low voltage system circuit and a high voltage system circuit. The low voltage system circuit includes an...
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7248023 |
Charger for lithium secondary battery and electronic apparatus including charger
A charger for a secondary battery including a positive electrode, a negative electrode including lithium-containing silicon represented by the composition formula Li x Si, and an electrolyte. This...
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7239112 |
Battery overcharging compensation system and method
A method for compensating for overcharging of at least one battery includes calculating a charge rate for the at least one battery, comparing an overcharge accumulator value for the at least one...
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7129675 |
System and method for battery charging
A method for charging a lead acid storage battery to advantageously extend its life is described. The termination of a charging process is based upon an evaluation of the first derivative (dv/dt)...
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6886104 |
Rechargeable mobile hand-held fingerprint scanner with a data and power communication interface
A mobile, hand-held fingerprint scanner is recharged by a data and power communication interface. The mobile, hand-held fingerprint scanner includes a rechargeable power supply and a data and power...
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6771044 |
Electrical power management for recharging multiple battery-powered computers
An electrical power management system is provided for effectively managing available electrical power for recharging batteries used in a plurality of battery-powered computers. The electrical power...
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6424158 |
Apparatus and method for carrying out diagnostic tests on batteries and for rapidly charging batteries
A method and system for performing automatic and rapid diagnostic testing and charging of a battery. The diagnostic test unit utilizes a charger combined with a rapidly variable load. After...
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6268715 |
Voltage profile charge control system
This invention is a battery charging system that charges rechargeable battery cells by tracking a voltage profile charging curve across time. As all lithium based, like voltage cells have the same...
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6140928 |
Remaining battery capacity measuring device
A remaining battery capacity measuring device having a microprocessor and an integrated circuit is packaged together with a secondary battery to form a battery pack. The integrated circuit includes...
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6037751 |
Method and apparatus for charging batteries
A method and apparatus for efficiently charging lead-acid batteries applies small voltage steps to probe the charging efficiency of a battery being charged. The application of a voltage step causes...
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5939865 |
Rechargeable battery having overcharge protection circuit and method of charging rechargeable battery
A rechargeable battery is provided with an overcharge protection circuit which is particularly adapted for nickel metal hydride battery packs to be used in conventional charging adapters suitable...
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5864224 |
Method for charging secondary battery and charger therefor
The present invention provides a method for charging a secondary battery and a charger by which it can be prevented that a secondary battery is charged at very high or low temperature, and that the...
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5780994 |
Detection of inflection point in secondary-battery charging process by matching voltage response to first derivative of battery's characteristic curve
A secondary battery charging method that utilizes a standard, characteristic reference curve for that type of battery for identifying the voltage inflection point during a constant-current charging...
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5739671 |
Device for accurate detection of remaining discharge capacities of a plurality of batteries
A charge state detecting device has a battery device including a plurality of batteries connected in series, a current sensor which detects a current flowing from the battery device, and a voltage...
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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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5642031 |
Battery recharging system with state of charge detection that initially detects whether a battery to be charged is already at or near full charge to prevent overcharging
A state of charge test is first performed on the battery by applying a current pulse and then observing the voltage decay characteristics which result. Batteries which are initially nearly fully...
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5619118 |
Method and an apparatus for charging a rechargeable battery
A rechargeable battery is charged by connecting the terminals of the battery to an electrical power source. In order to avoid overcharging and undue temperature increase in the battery cell, the...
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5600226 |
Methods of controlling the application and termination of charge to a rechargeable battery
As a substantially constant charge current is applied to a battery, the voltage is periodically measured and the slope of the voltage characteristic is calculated. The minimum slope of the bottom...
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5583871 |
Method for high-speed charging of secondary batteries and apparatus therefor
To provide a single universal charging apparatus, capable of charging at high speed and efficiency any type of secondary battery, and capable of charging secondary batteries any arbitrary charging...
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5537023 |
Charging method for storage batteries
The invention relates to a charging method for storage batteries, in particular for NiCd and NiMH cells. According to the invention, the rise in the charging voltage during each of a number of...
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5510693 |
Method for battery charging
The battery charging process of the present invention uses three charging rates. The initial charge rate of C charges the battery (101) until the battery's temperature reaches a certain level...
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5477125 |
Battery charger
A battery charge is provided which automatically controls the charging process independent of individual battery construction or temperature. Control of the charging process is achieved by...
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5467005 |
Battery charger which accounts for initial surge in battery voltage and which is immune to noise during completion of charging
A battery charger includes a circuit for detecting battery voltage (V1) appeared when a predetermined time (T1) has elapsed after starting a charging operation. The determination as to whether the...
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5449996 |
Battery charger with improved change stopping capability
A battery charger includes a circuit for monitoring a battery voltage during supply of a charging current to a battery, and a circuit for stopping the supply of the charging current when the...
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5444353 |
Battery charger
A status of a battery is detected to determine whether an amount of residual charge is large or not. Detection of the status of the battery is performed on the basis of a change in the voltage...
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5157320 |
Computerized battery charger
A battery charger for rapidly charging batteries of different capacity types is controlled by a microprocessor. The microprocessor controller is also connected to a voltage source which is...
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4767977 |
Battery charger
The battery charger includes a slope detector which responds to the battery voltage of the battery being charged, to generate a peak indicating signal, when the voltage decreases following the peak...
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4746852 |
Controller for battery charger
A controller for a battery charger terminates battery charging operation as a function of a time derivative of measured battery voltage. The controller has analog and digital embodiments. A...
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4639655 |
Method and apparatus for battery charging
A method and apparatus are disclosed for charging series connected batteries, particularly nickel cadmium. The means and method described are used for charging single or multiple batteries. In the...
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4629965 |
Battery charger termination circuit
A system for charging a storage battery initially charges the battery at a maximum rate of current which tapers in magnitude until the battery attains a selected voltage, and thereafter charges the...
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4396880 |
Method and apparatus for charging a battery
A battery is charged by repeatedly alternating between test and charge cycles. During the test cycle, the dynamic voltage-current characteristic of the battery is obtained as a function of the...
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4392101 |
Method of charging batteries and apparatus therefor
A method of fast charging batteries by means of precise analysis of the profile of the variation with time of a characteristic of the battery which is indicative of the variation in stored chemical...
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4388582 |
Apparatus and method for charging batteries
A method and apparatus are presented for charging batteries at a high rate without damaging or reducing the life of the battery. The method comprises monitoring the level of energy stored in the...
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4213080 |
Automatic electric battery charging apparatus
An automatic electric battery charging apparatus which includes terminating means comprising a bistable circuit having set and reset conditions, means for supplying a control signal dependent on...
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4194146 |
Device for controlling the charging and discharging of a storage battery
A device for controlling the charging and discharging of a storage battery has an input to which there is applied an input voltage proportional to the magnitude and sign of the current flowing...
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4097792 |
Battery charger control circuit
To prevent reduction in the efficiency of a battery in the wintertime for batteries used on vehicles outdoors, charging runs are automatically initiated in two or three hour intervals which are...
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4052656 |
Battery charging system
Apparatus and method for charging storage batteries by continuously sensing particular battery parameters and controlling the charging current in response thereto to charge a single battery, or a...
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3936718 |
Battery charging control circuits
An improvement in the battery charging control circuit of our co-pending Application Serial No. 400,001, and more particularly a new means for detecting the onset of gassing during the charging of...
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3911349 |
Battery charger
A battery charging apparatus wherein direct current voltage is applied to the battery to be charged through a controllable switch. The battery charger combines quick charge capability with long...
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3889172 |
Method and apparatus for limiting charge of a storage battery charged at a constant voltage
Method for charging, at a constant voltage, a storage cell battery liable to thermal runaway at the end of charge. The charge current is lowered or shut off at the instant when the derivative of...
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3886428 |
Electronic control system for battery chargers
An electronic control system for battery chargers in which the charging current is switched on and off at predetermined intervals of time, and the magnitude of the charging current during the ON...
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3886427 |
Battery charger control circuit
To periodically initiate a charging run during storage of the battery charger and battery for long periods of time, ten hertz clock pulses are applied to a first counter normally used to measure...
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