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| Number | Title | Issue Date |
| 5376887 | Battery tester with apertures for plural types and sizes of cells A low profile battery tester uses tapered apertures to located batteries in a thin tablet shaped body for testing. In one embodiment for conventional dry cells, the taper is in openings through the body, and in another embodiment for button cells the aper... | 12/27/1994 |
| 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 internal impedance of the battery, and a second set of measur... | 11/29/1994 |
| 5365453 | System for indicating a low battery condition A system for accurately predicting impending battery failure in battery powered electronic and electrical devices. The system continually monitors changes in battery voltage responsive to load changes and calculates a ratio of the change in voltage to the... | 11/15/1994 |
| 5365221 | Computer card having low battery indicator A battery powered electronic device (105) for coupling to a host computer (205 ) comprises an interface (115) for transmitting data and an annunciator (340) for generating a sensible alert. The electronic device (105) further comprises interface monitorin... | 11/15/1994 |
| 5363312 | Method and apparatus for battery control In a power supply control apparatus capable of connecting an AC adapter, it is determined by a controller whether or not the AC adapter is connected. When a battery is set in the apparatus, it is determined whether the battery is in a low battery state. W... | 11/08/1994 |
| 5359318 | Hand-held electronic apparatus using two batteries sequentially supplying current to inductive element In a hand-held electronic apparatus, such as radio display pager, a control circuit is powered by a first battery to produce an control signal for operating an inductive device such as vibrator. A second battery is provided having an internal resistance l... | 10/25/1994 |
| 5357244 | Pager system with use monitoring A pager system includes a transmitter with a control unit for selectively transmitting radio signals having specific pager codes, and a plurality of portable pager receivers each having its own electrical energy source and adapted to respond to a specific... | 10/18/1994 |
| 5357203 | Battery monitoring circuit for operating with high battery discharge rates A battery detect circuit (32) is connected to the battery with the current input to the battery and extracted from the battery measured with a sense resistor (50) and then converted to charge and discharge pulses with a V/F converter (52). A microcontroll... | 10/18/1994 |
| 5355089 | Moisture barrier for battery with electrochemical tester The combination of a main electrochemical cell (or battery cell) and a battery tester connected to the cell is disclosed. The battery tester is moisture sensitive, typically of the electrochemical type having a film-like construction comprising an anode l... | 10/11/1994 |
| 5352966 | Battery charging device A battery charging device uses a primary battery source which is preferably a rechargeable lead acid battery, connected to a secondary battery source, which is preferably a pair of parallel battery circuits each using series-connected non-rechargeable bat... | 10/04/1994 |
| 5352982 | Method and apparatus for displaying a residual electric charge of a battery for an electrically driven vehicle In a method and apparatus for displaying a residual electric charge for a battery of an electrically driven vehicle, the battery's capacity is detected after the battery is charged. This information is utilized by a residual electric charge meter to indic... | 10/04/1994 |
| 5349335 | Automatic gas spray device An automatic gas spray device for deterring crime is provided. The device includes a longitudinally grooved seat and a spring inside a casing for securing the position of a gas tank. A female connector on the outlet of the gas tank is detachably connected... | 09/20/1994 |
| 5345392 | Battery charge monitor for a personal computer A charge monitor for a battery operated computer includes a processor electrically connected to a plurality of signal generating circuits. The generated signals represent the temperature, voltage and current characteristics of the battery being monitored.... | 09/06/1994 |
| 5345163 | Battery monitoring system A battery monitoring method and apparatus are used for monitoring the charge level of a rechargeable electric storage battery, for example a lead acid battery. The counter-voltage of the battery is monitored by continuously monitoring the actual terminal ... | 09/06/1994 |
| 5343138 | Battery discharging and charging A storage battery is first substantially fully discharged before it is charged. A load impedance is first connected across the battery to receive current from the battery and develop a signal representative of the state of charge of the battery. Sensing t... | 08/30/1994 |
| 5343135 | Voltage limiting and indicating device A voltage monitoring and controlling device (1) adapted for attachment between a power source and a power discharge terminal, characterized in that the device includes circuit means to indicate whether the voltage level in said power source is below, or a... | 08/30/1994 |
| 5341084 | Method and device for determining and indicating a residual capacity of a battery In a method and a device for determining and indicating a residual capacity of a battery, a charging amount is measured in a charging mode in which a charger having a sensor for detecting a fully charged state is connected to the battery. If the charging ... | 08/23/1994 |
| 5339017 | Battery charge monitor An arrangement for detecting the state of charge of a vehicle battery (B201) in an electrical system (Z201) of a vehicle comprises an array of diodes (BD201) arranged to detect the initial voltage drop across the load when energised by a switch (M201). Ea... | 08/16/1994 |
| 5339024 | Battery with electrochemical tester The present invention relates to an electrochemical cell and a related state of charge indicator comprising an electrochemically generated display. The state of charge indicator comprises two electrical contacts and an electrochemically generated display ... | 08/16/1994 |
| 5332993 | Power controlling apparatus with a power failure detecting function A CPU in a power source controller generates various error status data, that correspond to various kinds of failure conditions, based on detection signals supplied from a variety of failure detection circuits provided at a power source circuit. The CPU co... | 07/26/1994 |
| 5325041 | Automatic rechargeable battery monitoring system An electronic device for monitoring the charge state of a rechargeable battery comprising a voltage sensor, a current sensor, a microprocessor, and a display. The voltage sensor is operatively connected to the microprocessor to provide to the microprocess... | 06/28/1994 |
| 5321627 | Battery monitor and method for providing operating parameters A battery monitor which monitors the operating parameters of a battery to provide an indication of, for example, the absolute state of charge, the relative state of charge, and the capacity of the battery under battery discharge, rest, and recharge condit... | 06/14/1994 |
| 5321626 | Battery performance monitoring and forecasting system Systems of battery cells and batteries are monitored via sensing probes arranged in assemblies providing digital output signals which indicate sensed physical parameters. Digital data strings are provided to the probes and modified to reflect present valu... | 06/14/1994 |
| 5321392 | Infusion pump with battery back-up An infusion pump is powered either from an ac line, a disposable battery or a rechargeable battery. The pump automatically differentiates between disposable and rechargeable batteries, and it includes an alarm activated when the pump senses that the batte... | 06/14/1994 |
| 5321389 | Battery charge monitor A battery charge monitor for automotive vehicles that includes electronic circuitry for connection to the vehicle battery and responsive to battery voltage to provide a first electrical signal when battery voltage decreases to a selected threshold level. ... | 06/14/1994 |
| 5317269 | Wrist-worn ECG monitor with battery end of life prediction A compact, lightweight wrist-worn cardiac data and event monitor having dry skin electrodes integral with the monitor's housing is disclosed. Preferably, the skin electrodes are made of titanium nitride-plated stainless steel and form inner, wrist-contact... | 05/31/1994 |
| 5315287 | Energy monitoring system for recreational vehicles and marine vessels The invention continuously monitors the current drawn from the on board battery system of a recreational vehicle or marine vessel. The device calculates and displays the energy remaining as a portion of the total capacity by accumulating over time the net... | 05/24/1994 |
| 5304986 | Battery voltage alarm apparatus There is provided a battery voltage alarm apparatus which announces the necessity of battery exchange when battery voltage falls below a predetermined level. The battery voltage alarm apparatus has a battery voltage detector, and a plurality of steps of d... | 04/19/1994 |
| 5302902 | Abnormal battery cell voltage detection circuitry Defective battery cells are detected by individually monitoring the voltage utput therefrom, which characteristically becomes abnormal when the defective condition occurs. Each cell is independently referenced to a common ground by its voltage monitoring d... | 04/12/1994 |
| 5295078 | Method and apparatus for determination of battery run-time in uninterruptible power system The run-time on battery power available from an uninterruptible power system is accurately determined both during supply of power from the battery through an inverter to the load and during the time where power is supplied directly from an AC power system... | 03/15/1994 |
| 5293526 | Electronic equipment including a plurality of independently powered apparatus Electronic equipment comprises a plurality of apparatus each of which is driven by respective power source, voltage detector provided to each of the apparatus which detects the voltage of the power source and a display which indicates, when the voltage dr... | 03/08/1994 |
| 5287286 | Low-battery state detecting system and method for detecting the residual capacity of a battery from the variation in battery voltage There is provided a low-battery detection reference voltage table for memorizing the correspondence between current values and low-battery detection reference voltage values, which is obtained from battery voltage characteristic curves corresponding to di... | 02/15/1994 |
| 5281955 | Battery charge monitoring apparatus and method An apparatus and method for monitoring operation and recording status of at least one battery component of an uninterruptable power supply is provided. Physical parameters of a battery are sensed and stored upon deviation from preselected limits. In addit... | 01/25/1994 |
| 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 current for measurement purposes is only imposed on a port... | 01/25/1994 |
| 5278541 | Enhanced reliability in portable rechargeable devices In a postage meter which has a meter section powered by house current in normal operation, but which requires auxiliary power source batteries while in transit, a circuit is provided which, in connection with a stored program, tests the auxiliary power so... | 01/11/1994 |
| 5278509 | Method for monitoring battery discharge by determining the second derivative of battery voltage over time The state of charge of a rechargeable battery (12), such as those made from lithium, nickel-cadmium or metal hydrides, can be accurately determined by monitoring the rate of change of battery voltage over time (dv/dt), which parameter has empirically been... | 01/11/1994 |
| 5268845 | Method for detecting low battery state without precise calibration A portable electronic system, which can accurately predict impending battery failure, without using expensive comparators, by using voltage and current measurements to determine the source impedance of a battery. Preferably two banks of batteries are used... | 12/07/1993 |
| 5265271 | Low battery detector An electronic device (100) operating on a battery voltage (126) is disclosed having a regulator (108) for producing a first reference voltage (106) and a second reference voltage (110). The electronic device (100) includes an A/D converter (114) for compa... | 11/23/1993 |
| 5254951 | Circuit for measuring discharging and charging current of a battery providing offset/drift voltage for correcting amplifier output A current measuring circuit for measuring discharging current and charging current of a battery, which is selectively connected to a load and a charger. The current measuring circuit comprises a resistor connected in series with the battery having a suffi... | 10/19/1993 |
| 5254996 | Charge monitoring system for a remote control system A remote control system has a transmitter, a current storage device feeding its triggerable control signals, an external receptacle into which the transmitter can be inserted, and a charge monitoring device with charge-state indicator. The charge monitori... | 10/19/1993 |
