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9007068 Method for detecting an electrical fault in an electrical network of a motor vehicle  
A method is provided for current-based detection of an electrical fault in an electrical network of a motor vehicle, the network having at least: one battery, one pulse-controlled inverter, one...
8975901 Measurement device and method thereof  
Measurement devices, systems, and methods to measure a high field conductivity of a fluid are provided herein. The measurement device includes a fluid cell, a pair of electrodes, a voltage switch,...
8854070 Charging device, detection system, and method of testing a detection system  
A charging device for a power storage device includes a power conduit configured to deliver current to the power storage device and a detection system configured to be coupled to the power...
8797040 Method, electric circuit arrangement and electric memory unit for determining a characteristic status parameter of the memory unit  
The invention relates to a method for determining a characteristic status parameter of a memory unit via an electric circuit arrangement. In the circuit arrangement at least one inductive...
8791702 Ground fault detection circuit, and power supply device  
A ground fault detection circuit according to the present invention is a ground fault detection circuit that detects the occurrence of a ground fault of a battery that is insulated, and that...
8680868 Spectroscopic battery-cell impedance measurement arrangement  
A battery cell measurement system comprising a signal generator coupled to a pulse density modulation circuit generating a control signal which drives a switch connected between a first terminal...
8305043 Voltage detecting apparatus with voltage controlled oscillator and battery state control system  
In a voltage detecting apparatus, a voltage controlled oscillator, when an input voltage is applied thereto, outputs a signal with a logical value that is periodically inverted. A detector counts...
8125344 Portable computer battery indicator  
A portable computer may include battery indicator light structures. Battery status information in the portable computer may be presented to a user using an array of light-emitting diodes or other...
8108160 Method and system for determining a state of charge of a battery  
Methods and systems for determining a state of charge of a battery are provided. A first component of the state of charge is calculated based on a first property of the battery. A second component...
7746026 Controlling state of charge of a vehicle battery  
A method of controlling a state of charge of a battery in a vehicle includes receiving a request to enter an enhanced charging mode. A target for the state of charge is increased from a normal...
7698669 Method and system to evaluate operational characteristics of an electronic circuit  
The present invention is directed to a method and a system to evaluate operational characteristics of an electronic circuit. The method includes generating a visual display, on a monitor, of an...
7679369 System and method to measure series-connected cell voltages using a flying capacitor  
A system and method for measuring voltage of individual cells connected in series includes a single flying capacitor. The capacitor stores the charge of one of the cells such that an...
7545691 Measuring circuit for qualifying a memory located on a semiconductor device  
A measuring circuit is provided for a memory integrated within a semiconductor device. The measuring circuit includes initializing means and an oscillating loop. The initializing means loadings...
7072781 Architecture for generating adaptive arbitrary waveforms  
A test system having a feedback loop that facilitates adjusting an output test waveform to a DUT/CUT (Device Under Test/Circuit Under Test) on-the-fly according to changing DUT/CUT parameters. The...
6747456 Electro-chemical deterioration test method and apparatus  
A portable instrument capable of evaluating the electro-chemical deterioration of an object under test such as a multi-cell valve regulated battery (10) and comprising means capable of temporarily...
6687631 Laplace transform impedance spectrometer and its measurement method  
A method of measuring impedance is based on carrier function Laplace transform. The measurement includes detecting a response signal from a device under test, to which signal an excitation such as...
6507196 Battery having discharge state indication  
A storage battery of the conventional kind for supplying power to electrical devices has a supervising unit for determining the electric capacity. The supervising unit is electrically connected to...
6411098 Energy device analysis and evaluation  
A method and apparatus for creating, measuring and analyzing polarization voltages developed across an element, such as an electronic component or an electrochemical energy cell, or network of...
6404204 Sensor and sensor system for liquid conductivity, temperature and depth  
Liquid conductivity and temperature are measured in respective sensitivity fields that are collocated—i. e., in volumes that nearly match by mathematical, geometrical, or functional criteria....
6278280 Battery inactivation detection device  
A cell which has become inactive is detected in a multi-cell battery (15) comprising plural cells (Cn). An inactivity detecting circuit comprising a signal generator (Dn 1) and a diode (Dn 2)...
6222370 Universal battery monitor  
The invention includes a direct current energy source monitor which automatically detects the nominal voltage of the direct current energy source to which it is attached. The invention further...
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...
5773978 Battery impedance monitor  
A battery impedance monitor includes a driver section having an oscillator which produces a pulsating loading signal which controls periodic loading of the battery to produce at its output...
5717336 Method and apparatus for determining the charge condition of an electrochemical cell  
A method for determining whether an electrochemical cell is substantially fully charged. The determination is made by ascertaining the rate of change of the impedance of the cell with changing...
5592095 Charge measurement circuit for a battery in which oscillators are used to indicate mode of operation  
A battery pack (10) has a charge measurement circuit (12) for estimating the state of charge during use. The charge measurement circuit (12) includes a sense resistor (24), amplifier (26), at...
5477129 Charge level display method and apparatus for a battery of an electronic device  
A portable computer is positionable between an open condition in which an input device and an output device thereof is exposed to a user of the portable computer, and a closed condition in which...
5369364 Battery state of charge determination with plural periodic measurements to determine its internal impedance and geometric capacitance  
A method and apparatus for measuring the depletion level (depth of discharge) of a lithium-iodine battery in an implantable medical device. A first set of measurements are made to determine the...
5250903 Method and apparatus using oscillatory magnetic field to determine state of charge of an electrolytic storage cell  
Nonintrusive sensors capable of measuring various storage cell parameters such as voltage, state-of-charge, electrolyte level, internal resistance, and temperature are attached to a monitoring...
5238184 Thermostat having simple battery level detection  
A thermostat having a simple battery level detection circuit. The output of an oscillator, having a frequency dependent upon the battery level, is compared to the output of a battery level...
5187441 Portable information apparatus for sensing battery voltage drop  
The portable information apparatus has a battery, a boosting circuit for boosting a voltage of the battery, a battery voltage detector for detecting a voltage level of the battery, an oscillating...
5144248 Method and apparatus for measuring the voltage and charge of a battery  
Method and apparatus for measuring the voltage and state of charge of a secondary battery. The voltage and state of charge values are taken by a circuit every four (4) seconds by reading voltage,...
5140269 Electronic tester for assessing battery/cell capacity  
A self-contained electronic device instantaneously assesses the stored energy capacity of single, two-volt, lead-acid cells; or of batteries comprised of such cells. The testing device is...
5093624 Battery monitoring  
Monitoring state of charge of an electric storage battery (18) is done by deliberately inducing eddy currents, specifically using an induction coil (70) in conductive metallic constituents of...
5047722 Apparatus for measuring internal resistance of wet cell storage batteries having non-removable cell caps  
Apparatus for measuring the total internal resistance of a multicell battery having positive and negative terminals employs a first transistor device having an input and an output and having...
4981764 Method of providing a indication signal to indicate a level of electrolyte in a wet cell  
A battery monitors by which an individual cell in a wet cell battery may be monitored for variations in the level of electrolyte contained in the cell. More specifically, the invention relates to...
4913987 Universal electrolyte level indicator for wet cell batteries  
A battery monitors by which an individual cell in a wet cell battery may be monitored for variations in the level of electrolyte contained in the cell. More specifically, the invention relates to...
4875940 Massecuite supersaturation monitor  
The invention provides an apparatus for controlling both the supersaturation of the mother liquor and the crystal content of massecuite by measuring di-electric constant and electrical...
4825170 Electronic battery testing device with automatic voltage scaling  
A self-contained electronic device for testing disparate storage batteries having any one of a fixed plurality of possible nominal voltages is disclosed. The testing device performs small-signal...
4816768 Electronic battery testing device  
An improved self-contained electronic device for testing storage batteries and other dc sources is disclosed. The testing device accurately performs small-signal measurements of the battery's...
4719428 Storage battery condition tester utilizing low load current  
A condition tester for a storage battery that monitors the effect of internal battery resistance without drawing large currents. A switched load periodically draws a small current across the...
4693119 Lithium battery energy monitor  
A lithium battery is provided with an energy monitor that continuously inates the energy remaining in the battery. An electrolytic coulometer is connected in series with the battery and has a...
4687996 Method and apparatus for measuring remaining charge of galvanic cell  
A method and apparatus for measuring the remaining charge of a galvanic cell effects the measurement of the remaining charge by superimposing an AC voltage or current on DC voltage or current...
4560937 Battery state of charge metering method and apparatus  
The system includes a digital integrator having a plurality of digital stages operable to store a numerical value in binary digital form which is indicative of state of charge. A switching circuit...
4535325 Low charge detector  
A low charge detector, for a measuring instrument incorporating a meter for indicating measurement readings, includes a "low battery detector" circuit which causes a first output to be released...
4517517 Nickel-cadmium battery conditioner and tester apparatus  
A battery tester apparatus having a discharge circuit with a visual indicator that the discharge cycle is in progress operating in combination with a comparator to determine when the terminal...
4498044 Method and circuitry for measuring the impedance of a sensor  
A method of measuring the impedance of a sensor by applying a sine-shaped AC voltage and transforming the response signal proportional to said impedance into a DC voltage such that even for very...
4488115 Low battery voltage indicator circuit for a metal detector  
A metal detector is disclosed which has a transmit coil, a receive coil, and circuit means for detecting metal objects due to a change in the magnetic coupling between the coils. Circuit board...
4376265 Power source voltage checking device particularly for checking the voltage of a battery in a camera  
In the disclosed device, a signal forming circuit produces a signal having a frequency corresponding to the voltage of a power source. A level detector detects the level of the voltage of the...
4360779 Measuring device for electrical cells  
The present invention relates to apparatus and methods for measuring the different potential drops in electrochemical cells (EC), i.e. measuring independently the following: anodic and cathodic...
4338596 Circuit for indicating the condition of the battery in a photographic camera  
When the battery voltage is sufficient, and not nearing the point of insufficiency, a light-emitting diode is steadily illuminated. As the battery voltage decreases, the steady component of...

Matches 1 - 50 out of 86 1 2 >