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6590396 Device and method for indicating in-use charging and abnormal discharging of a combustion engine battery following engine turn-off  
A device and corresponding method for indicating in-use charging and abnormal discharging of a combustion engine battery during and following engine turn-off using a current sensor, a charge level...
6534954 Method and apparatus for a battery state of charge estimator  
The present invention relates to an implementation of a battery State of Charge (SOC) estimator for any battery type. It addresses the problems associated with the existing implementations such as...
6518730 Power supply unit, battery electrical apparatus, and memory effect detection method  
A power supply unit includes a rechargeable battery for supplying power to a body circuit of an electrical apparatus, a current measurement circuit for measuring a currently-discharged current...
6472879 Method for diagnosing a battery of a vehicle and a system thereof  
When charging of a battery is started, a voltage of each module being charged is detected, and then an average voltage and at least one of a maximum voltage and a minimum voltage of the modules...
6466041 Method for setting the trigger power of transmitter diodes  
A method for setting the trigger power of transmitter diodes that transmit data via optical paths allows the transmission power to be adjusted and adapted to the communication distance. The...
6437575 Low-voltage detecting circuit  
A low-voltage detecting circuit for power sources is based upon the relation of the discharge time of a capacitor and the measured voltage value to determine whether the voltage level of the power...
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...
6424156 Storage capacitor power supply  
A long-lived, lightweight, and quickly and precisely charged storage capacitor power supply capable of stably supplying electric power to a load. The power supply has a capacitor block consisting...
6424157 System and method for monitoring a vehicle battery  
A system and method for monitoring and reporting on the condition of a vehicle battery which measures battery voltage and current drain during engine start, and computes the battery dynamic...
6392415 Method for determining the state of charge of lead-acid rechargeable batteries  
A method for determining the state of charge of lead-acid rechargeable batteries comprising a) substantially simultaneously measuring measured-value pairs (Ui, Ii) of the rechargeable battery...
6373256 Programmable low battery detector  
A low battery detect circuit with digitally programmable detect levels. The programmable low battery detect circuit includes a comparator that compares a stable reference voltage against a...
6344730 Method and apparatus for determining the remaining operating time of battery-powered appliances  
A method and apparatus for determining the remaining operating time of an appliance powered by batteries or accumulators determine and indicate the remaining operating time by measuring and...
6329793 Method and apparatus for charging a battery  
An apparatus for charging a battery, includes a first electrical connector configured to couple to a positive terminal of the battery and a second electrical connector configured to couple to a...
6320354 Method and apparatus for battery charging  
A battery charging circuit comprises a recharge input and a recharge output with a switching element electrically coupled in series between the recharge input and output. A recharge controller...
6313750 Measuring cell voltages of a fuel cell stack  
A system includes a divider network, a memory and a circuit. The divider network is adapted to be coupled to fuel cells of a fuel cell stack and provide pairs of signals. Each pair of signals is...
6313751 Battery failure indicator for a single battery  
A modification to existing mono-block battery design for positively indicating the operating condition of the battery by adding a failure detector. The voltage of two groups of internal series...
6313606 Method and apparatus for detecting battery capacity  
A method and apparatus for detecting the capacity of a battery wherein a voltage method of measuring the voltage of the battery, to calculate the capacity of the battery based on the correlation...
6311080 Method for detecting full charge state of battery  
A method for detecting a full charge state has the steps of obtaining a first data series including first to N-th data items, the first to N-th data items of the first data series corresponding to...
6304088 Voltage monitor circuit with adjustable hysteresis using a single comparator  
A voltage monitor circuit for monitoring a first voltage includes a switch and a comparator. The switch has a first position and a second position. When the switch is in the first position, the...
6304087 Apparatus for calibrating electronic battery tester  
A calibration fixture is provided for calibrating an electronic battery tester which has first and second battery tester Kelvin connections configured to couple to terminals of a battery. The...
6275042 Equipment for testing battery of electric device  
An equipment is designed to test the residual characteristic of a battery set of an electric device. The equipment comprises a microcomputer main unit, an analog/digital converter, a decoder, at...
6268732 Method and apparatus for automotive and other battery testing  
A method of testing applicable to the routine testing of batteries for automotive vehicles and like batteries is described. The method comprises: providing a battery to be tested; providing a test...
6268710 Battery monitor apparatus  
A battery monitor apparatus for monitoring the voltage of each cell of a battery pack including a plurality of cells is disclosed, in which each cell of the battery pack having the plurality of...
6268712 Method for determining the starting ability of a starter battery in a motor vehicle  
A method for determining the starting ability of the starter battery in a motor vehicle. The current and voltage of the storage battery are measured before starting is begun, shortly after...
6265877 Method for determining an end of discharge voltage for a secondary battery  
Method for determining a determination voltage (end of discharge voltage) of a secondary battery having a nickel-hydroxide positive electrode based on the state of charge of the battery. The end...
6255801 System and method for assessing a capacity of a battery and power plant incorporating the same  
A system for, and method of, assessing a capacity and/or age of a battery. In one embodiment, the system includes: (1) a voltage sensor, coupled to the battery, that develops a signal indicative...
6215275 Method for the automatic determination of battery chemistry in portable electronic devices  
A method that distinguishes different battery chemistries in portable electronic devices using a simple electrical test. The present method facilitates accurate fuel gauging as well as providing a...
6198254 Battery capacity measurement apparatus, taking into consideration a gassing voltage that changes relative to temperature  
The temperature of a battery is detected by a temperature sensor, and a gassing voltage based on the temperature is determined by a gassing detection processing section at all times, and even...
6166548 Method of detecting battery capacity in a zinc-air battery  
A method of detecting battery capacity in a zinc-air battery. The method includes the steps of removing all non-essential loads from the battery for a first period of time, thereafter and for a...
6154009 Power supply monitoring IC and battery pack  
In a power supply monitoring integrated circuit device, a capacitor for setting a non-responsive interval is discharged at an increased rate without an undue increase in the current consumption of...
6127806 State of charge indicator  
A state of charge indicator of a lithium ion battery computes a state of charge (SOC) corresponding to a cell open circuit voltage from a SOC-cell open circuit voltage characteristic map, and...
6118295 Power supply voltage detection device  
A power supply voltage detection device includes a reference voltage generating circuit, an integrator circuit, a lower limit comparator, and an upper limit comparator. The reference voltage...
6103408 Electric battery  
In an electric battery, an electronic clock is integrated in the battery container in order to monitor battery functions. The frequency of the electronic clock is varied as a function of at least...
6094051 Apparatus and method for detecting memory effect in nickel cadmium batteries  
The invention provides for a timesaving method of determining whether a nickel cadmium (NiCd) battery is stricken with memory effect. A fully charged NiCd battery under test ("test battery") is...
6091325 Device and method for warning of vehicle battery deterioration  
An improved device and corresponding method for warning of deterioration of a starter mechanism in which a motor is powered by a battery to start a combustion engine, prior to failure of the...
6075378 Electrical energy storage capacitor power supply capable of shorting out defective capacitors  
There is disclosed a power supply for storing electrical energy in capacitors connected in series, the power supply having a function of shorting out capacitors at fault. Shorting means are...
6037778 Electronic battery testing device and method for testing batteries  
An electronic battery testing device and a method for testing batteries are provided. Device applies a small first fixed load and measures the voltage at the end of the first fixed load and then...
6020743 Method and apparatus for detecting failed batteries  
A technique for detecting failed batteries while the battery is attached to one or more electronic devices and is receiving a float charge is disclosed. The float voltage minimizes the normal...
6008652 Battery tub tester  
A battery tub tester is disclosed that tests the individual batteries, battery accessories and connections as they are being assembled into a battery tub for an electric vehicle. The batteries and...
5973497 Method of determining and displaying battery charge status  
A method of determining and displaying the charge status of a storage battery of a battery-operated appliance, such as a razor. A time-based charge status is calculated, based at least in part on...
5969529 Electronic apparatus having battery power source  
A voltage monitoring circuit (4) detects when the output battery of a power source (e.g., battery) falls below a predetermined reference voltage. A controller (3), in response to the monitoring...
5963140 Remaining battery energy indicating instrument  
A remaining battery energy indicating instrument with a reduced integration error even if a battery is repeatedly charged and discharged without being fully discharged. A remaining battery energy...
5949233 Circuit for detecting overcharging and overdischarging  
Instability and oscillation are avoided in an overcharge/overdischarge control circuit by providing comparators with sufficient gain to minimize leakage current penetration into control circuitry...
5945829 Midpoint battery monitoring  
A device for testing a battery includes circuitry adapted to measure a first conductance of a first portion of a string of cells that makes up the battery. Further circuitry is adapted to measure...
5942872 Method of controlling a stepping motor  
A method and a device for controlling a stepping motor in which the width of step and the direction of rotation of the stepping motor are determined in a controller and sent to a control...
5936534 Alarm circuit for residual capacity of battery in portable radio transmitting and receiving apparatus  
Voltage setting information designating a battery voltage for initiating alarming and alarm setting information designating a method for outputting the alarm are input from a keying section and...
5933010 Device to detect charging condition of a storage battery  
This relates to a device consisting of a first plurality of light sources that light only when the voltage of a storage battery in a storage battery-generator system is below a predetermined...
5925479 Moisture barrier composite film of silicon nitride and fluorocarbon polymer and its use with an on-cell tester for an electrochemical cell  
A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell, comprises a...
5920190 Sampled capacitor electrometer  
An electrometer (20) for measuring an unknown DC potential finds particular utility in applications requiring a high input resistance and minimal current drain during measurement. The electrometer...
5912548 Battery pack monitoring system  
An electronic device for monitoring the operating conditions of a rechargeable battery, and includes a temperature monitor for monitoring the operating temperature of the rechargeable battery; a...