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7382270 |
Method and apparatus for communication between an electronic device and a connected battery
An apparatus supporting both identification of a battery type and communications over an interface between a battery and an electronic device is disclosed. The electronic device includes a...
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7265678 |
System and method for remotely controlling low battery warnings for smoke detectors and the like
An intelligent thermostat communicates with battery-powered threat detectors, such as smoke detectors, to allow remote quieting and coordination of a low battery warning detected by the threat...
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7239237 |
Hand crank weather channel receiver with cell phone charger
An apparatus comprising a housing. A rechargeable battery source for providing a first source of direct current, a hand-crank dynamo configured to replenish the rechargeable battery source, and a...
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7113087 |
Proximity sensing based on antenna impedance variation
Proximity of a user body part can be detected by measuring the effects such proximity has on antenna impedance mismatches. The amount of mismatch affects the amount of RF signal energy reflected...
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7079038 |
Method and apparatus for communication between an electronic device and a connected battery
An apparatus supporting both identification of a battery type and communications over an interface between a battery and an electronic device is disclosed. The electronic device includes a...
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6677860 |
Method and apparatus for end of discharge indication based on critical energy requirement
A battery monitoring system and method in accordance with the principles of the present invention, a capacity of interest is determined. This capacity of interest is the useful battery capacity...
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6262563 |
Method and apparatus for measuring complex admittance of cells and batteries
A periodic time-varying current with smallest period 1/f 1 excites a cell/battery and provides a timing reference. Linear circuitry produces two signals, one proportional to the excitation...
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6191590 |
Device and a process for monitoring the state of charge of a battery
A device and method for determining the state of charge of a battery includes a microprocessor-controlled arithmetic unit connected in parallel to the terminal voltage of the battery. The...
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6114838 |
Battery capacity test method and apparatus
A battery capacity tester method and apparatus are provided. The battery capacity tester determines the present internal battery impedance by measuring terminal voltages during successive...
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6023150 |
Optimized method for determining remaining life cycles in a rechargeable battery
A method (200) of estimating existing and/or remaining life cycles of a battery pack (102) having an internal battery cell (104) and battery pack circuitry (110) is based on determining an...
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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 a...
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5869969 |
Battery charger/rectifier voltage temperature compensation circuit including protection and diagnostic scheme
A temperature compensation module for use with battery charger/rectifier units. The compensation module is used to vary the battery charger output voltage as a function of temperature. This is done...
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5862515 |
Battery tester
A battery tester is formed at an AC constant-current generator for applying an AC current for measurement to a battery BT under test via a coupling capacitor, an internal resistance detecting...
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5821757 |
Noise reduction in an on-line battery impedance measurement system
Connections between batteries and impedance measuring circuitry in a system for on-line measurement of battery cell impedance is effected by twisted wire triplets.
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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...
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5757192 |
Method and apparatus for detecting a bad cell in a storage battery
A method and apparatus for detecting a bad cell in a storage battery having a plurality of cells as provided. Input circuitry electrically couples to first and second terminals of the storage...
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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...
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5703469 |
System for determining battery conditions
Detected values of a voltage and a current of a battery which are supplied from a voltage and current detector are stored in a memory at a plurality of times while the battery is being discharged....
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5696437 |
Intelligent low battery detection circuit for a paging receiver
A low battery condition is determined by sampling battery terminal voltage with a voltage comparator under light and heavy loading, and indicating a low battery condition when the rate of change of...
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5675234 |
Multicell battery monitoring system
A continuously monitored battery operated power supply for maritime applications includes four batteries which form a parallel connected pair of banks in which the cells in each bank are series...
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5410239 |
Battery charger with capacity monitor
An automatic shut-off battery charging system which employs a timing control circuit (TC101) to initiate intermittent monitoring of the equivalent internal resistance of a load battery (B101) under...
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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...
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5281920 |
On-line battery impedance measurement
Impedance measurement of battery cells within a battery system comprising at least one string of battery cells is accomplished by dividing each of the strings into at least two portions. A loading...
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5250904 |
Device for predicting imminent failure of a stationary lead acid battery in a float mode
A stationary battery testing device as provided for measuring imminent battery failure while the battery is in a float mode. The device includes a circuitry for measuring the internal resistance...
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5241275 |
Method of measuring remaining capacity of a storage cell by comparing impedance plot characteristics
The remaining capacity of a storage cell, particularly a valve regulated lead-acid cell, is determined by measuring its impedance at typically two or three relatively low frequencies f, e.g.,...
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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...
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5119011 |
Battery state of charge indicator
A method for measuring and storing the state of charge of batteries, such as used in electric vehicles. The stored charge value is initially derived from the value of battery terminal voltage...
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5095308 |
Transceiver with battery saver and method of using same
A portable transceiver has a battery saving feature which includes a timer, circuit which automatically cuts off the power supply to the receiver and transmitter for relatively long intervals and...
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4916438 |
Battery charging, monitoring and alarm circuit
Methods and circuits are provided for monitoring a battery with the monitored battery electrically connected in an operating system. A dynamic impedance characteristic of the monitored battery is...
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4890108 |
Multi-channel remote control transmitter
A multi-channel remote control transmitter is disclosed for control of apparatus such as vehicle security systems, garage door openers, and the like. The transmitter provides the capability of...
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4876513 |
Dynamic state-of-charge indicator for a battery and method thereof
A dynamic state-of-charge indicator for a storage battery characterized by a discharge curve relating available energy of the battery to a contemporaneous voltage over a range of voltage boundaries...
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4743855 |
Method of and apparatus for measuring the state of discharge of a battery
A method is described of measuring the state of discharge of a battery, i.e. the ratio between the supplied capacity and the nominal capacity. The method consists in measuring a first internal...
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4678998 |
Battery condition monitor and monitoring method
A battery condition monitor and monitoring method uses known relationships between battery impedance, remaining capacity and remaining service life at different frequencies to detect remaining...
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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...
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4423379 |
Battery testing techniques
A system and method for testing a battery having an internal impedance by generating digital battery parameter values corresponding to the battery parameters at different points in time by means of...
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4423378 |
Automotive battery test apparatus
The condition of a storage battery of an internal combustion engine powered vehicle is tested automatically, and an indication of battery condition is provided to the service technician. The...
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4342953 |
Battery protection circuit
A battery protection circuit particularly for portable lamps employing rechargeable batteries is provided to prevent overdischarge of the batteries and includes a bulb drive transistor connecting a...
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4320333 |
Battery charger and surveillance system
A battery charging apparatus has a control circuit which controls the rate of input of AC power through a synchronous switch--a saturable core reactor, magnetic amplifier or a pair of anti-parallel...
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4316185 |
Battery monitor circuit
A battery monitor circuit for rechargeable multicell batteries that provides a reliable indication of battery failure independent of temperature, load and age, by continuously comparing the...
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4307389 |
Decoding circuit
A circuit for sensing a plurality of inputs, each of which have a plurality of condition states, and providing a visibly coded output signal to a single indicator lamp, or the like, whereby one may...
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4258306 |
State of battery charge indicator circuit
An indicator circuit for indicating to the operator of an electrically propelled vehicle the remaining capacity of the vehicle battery. The state of charge information is indicated in digital form...
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4251811 |
Battery test system, as for smoke detector alarm
A system for use in battery powered alarm equipment for self-testing such battery for a low voltage and a high series resistance condition, and particularly for use in systems which utilize a...
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4231027 |
Battery monitoring means for an implantable living tissue stimulator
A battery monitoring means for an implantable living tissue stimulator system in which various battery voltages are telemetered to an external receiving means, these voltages being related to the...
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4149162 |
Battery discriminator circuit for smoke detectors
A battery powered smoke detector includes a battery powered discriminator circuit which periodically senses the chemistry of the battery represented by its volt-ampere output and internal...
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4099115 |
Constant-voltage regulated power supply
The temperature-dependent characteristics of a constant-voltage regulated power supply are determined by combining output voltages of a pair of circuits that have positive and negative...
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4083037 |
Detection circuit
A battery-powered fire alarm including a smoke detector, a controllable horn circuit and a battery monitoring circuit. The smoke detector employs a pair of complementary field-effect transistor...
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4052717 |
Battery condition monitoring method and apparatus
A battery condition monitoring device which senses battery terminal voltage and creates a function thereof and tests that function against predetermined criteria and determines battery condition as...
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3889248 |
Faulty battery connection indicator
A faulty connection betwen the terminal post of a battery and the cable connector clamp is determined by means of an indicator connected across the connection. The indicator may take the form of a...
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3811122 |
SUPERVISED BATTERY POWER SUPPLY
A circuit for indicating the presence or condition of a battery in which the battery while present or in good condition is used as a current by-pass to control an alarm circuit. The circuit is...
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3680072 |
STORAGE BATTERY MONITORING APPARATUS
An apparatus for monitoring the charge of a storage battery which gives an indication of the state of the charge. The charge is monitored by placing a current pulse through the internal resistance...
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