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| Number | Title | Issue Date |
| 6137268 | System with limited long-time-averaged battery charging rate A battery charging system in which current is averaged over a long time period (seconds) to determine the maximum average charging rate. When the integral of charging current over this long period reaches the programmed maximum charge value for one period... | 10/24/2000 |
| 6107778 | Line-replaceable battery disconnect module and method of manufacture thereof Battery backed-up power units, and battery disconnect modules and methods of manufacturing the same. One of the battery disconnect modules includes: (1) a contactor having a body, a control input and rigid conductors extending from the body and (2) a cont... | 08/22/2000 |
| 6097172 | Method and apparatus for determining when to terminate charging of a battery An apparatus and method for charging a battery are described in a technique wherein charge pulses are followed by discharge pulses and then first rest periods and other discharge pulses followed by second rest periods. Selected ones of the second rest per... | 08/01/2000 |
| 6091227 | Process and apparatus for charging lithium cells or the like A process for charging one or more lithium containing electrochemical cells which exhibit a plurality of characteristics with respect to time while either being charged with or while discharging energy, wherein the charging process includes an unpetrify p... | 07/18/2000 |
| 6046570 | Waveform generator and control circuit The circuit rapidly connects and disconnects solar cells to a battery to be charged. As a result of this operation, a "force charge" is applied to the battery even when low radiation is incident on the solar cells, resulting in increased efficiency of a s... | 04/04/2000 |
| 6043630 | Fast battery charging system and method In an exemplary fast charging system, a hand-held computerized terminal with rechargeable batteries therein may be bodily inserted into a charger receptacle. The terminal may have volatile memory and other components requiring load current during charging... | 03/28/2000 |
| 6030072 | Fault tolerance in high volume printing presses A method of reducing the `downtime` of the printing line involves the inclusion of at least one spare printing module, and a method of transferring digital representations of page images between modules. As soon as a fault is detected, a digital image dat... | 02/29/2000 |
| 6025699 | Self discharge of batteries at high temperatures A rechargeable battery pack that includes a temperature monitoring circuit a rechargeable battery, and a discharge circuit, advantageously provides a battery pack which senses when the battery pack is exposed to a harmful temperature and cause the dischar... | 02/15/2000 |
| 6023146 | Battery system electrical connection apparatus and method Disclosed is a battery system in which a battery is provided with a pair of quick connect electrical contact mechanisms. A battery tray, for receiving the battery, is also provided with a pair of quick connect electrical contact mechanisms which are adapt... | 02/08/2000 |
| 6020721 | Indirect thermal sensing system for a battery charger A battery charger including a battery temperature monitoring device. The battery temperature monitoring device includes a first thermistor bonded to one of the terminals of the battery charger to provide a temperature signal of the temperature of the term... | 02/01/2000 |
| 6020718 | Battery capacity predicting method, battery unit and apparatus using battery unit A battery capacity predicting method predicts a remaining capacity of a battery unit including a plurality of battery cells connected in series in an apparatus which uses the battery unit. The battery capacity predicting method includes the steps of compa... | 02/01/2000 |
| 6018229 | Lithium-ion battery pack with integral switching regulator using cutoff transistor A sealed rechargeable lithium-ion battery pack which includes a switching voltage regulator. The regulator uses the normal cutoff transistors as the switching devices, and also includes a discrete inductor in the battery pack. The regulator is operated wi... | 01/25/2000 |
| 5998972 | Method and apparatus for rapidly charging a battery of a portable computing device Improved techniques for charging batteries within portable computing devices are disclosed. The improved techniques operates to charge a battery at an approximately constant power level by adjusting a charge current as the battery voltage changes. As a re... | 12/07/1999 |
| 5994873 | Correction device and correction method for secondary batteries connected in series A correction device for secondary batteries comprises a voltage difference detection circuit for detecting variation in terminal voltages of at least two secondary batteries connected in series, and a discharge circuit for discharging one of the at least ... | 11/30/1999 |
| 5990663 | Charge/discharge control circuit and charging type power-supply unit To enhance the performance as well as the reliability and safety of a charge/discharge control circuit and a charging type power-supply unit using it, a charge/discharge control circuit 102 is made to have a circuit construction wherein when a load 109 ha... | 11/23/1999 |
| 5990666 | Charging generator having a short protection circuit A short protection circuit is provided to periodically supply a reset pulse, turns on an electric power element only during the period of the reset pulse, and decide the presence and absence of a short circuit under the condition that the electric power t... | 11/23/1999 |
| 5990664 | Process and apparatus for modulating terminal voltage of battery The present invention provides a method and apparatus for converting the terminal voltage of a battery so that one or more operations (such as shut-down, save-to-disk, and the like) begin at the appropriate point on the discharge curve for various cell ch... | 11/23/1999 |
| 5986435 | Method of utilizing a battery powered system having two processors In an exemplary embodiment, a battery conditioning system monitors battery conditioning and includes a memory for storing data based thereon; for example, data may be stored representative of available battery capacity as measured during a deep discharge ... | 11/16/1999 |
| 5986437 | Power supply system for portable electronic devices A power supply system for a portable device such as portable personal computer, to be operated from a DC power source supplied from a rechargeable battery or an AC adapter includes: an input current detecting circuit for detecting an input current supplie... | 11/16/1999 |
| 5982142 | Storage battery equalizer with improved, constant current output filter, overload protection, temperature compensation and error signal feedback A three terminal battery equalizer which includes a DC--DC converter has a first filter inductor in the switched, current conducting path connected to the battery ground and a second filter inductor in the switched, current path connected to the non-groun... | 11/09/1999 |
| 5982148 | Method and apparatus for monitoring the self discharge of a secondary battery upon completion of a charge cycle A battery charger monitors the terminal voltage of a secondary battery connected thereto with no appreciable depletion of the battery energy. Upon the completion of the charge cycle, the battery charger monitors the terminal voltage of the battery by firs... | 11/09/1999 |
| 5982146 | Method and apparatus for conditioning battery while external power is applied A method which may be used to condition a battery. The method includes sensing that the battery needs to be conditioned while an external power source is being used as the source of system power. According to the method, the battery is then used as the sy... | 11/09/1999 |
| 5982151 | Battery charger and battery charging method In a battery charger, current regulating means and voltage regulating means can be prevented from damages. In the case where a loss of current regulating means (11) or voltage regulating means (12) exceeds an allowable loss, pulse width modulating means (... | 11/09/1999 |
| 5977747 | Cellular phone battery charger with an emergency battery charging function A cellular phone battery charger includes a housing, a control circuit assembly mounted within the housing, the control circuit assembly having a power jack for obtaining power supply from a car battery by a cable or a city power supply outlet by a transf... | 11/02/1999 |
| 5973476 | Battery packs including rechargeable and non-rechargeable batteries and related systems and methods A battery pack for an electronic device includes a housing separate from the electronic device wherein the housing can be mechanically connected to the electronic device. Electrical contacts on the housing provide electrical contact with the electronic de... | 10/26/1999 |
| 5969506 | Apparatus and method for rapid bulk charging of a lead acid battery Apparatus to rapidly bulk charge a lead acid battery used in a "standby" power supply unit (PSU), or similar equipment containing said function, such as in an alarm panel system, fire panel (system) etc., without increasing the output capacity of the regu... | 10/19/1999 |
| 5969747 | Efficient LED light geometry for optical printers A light source is disclosed for use an optical printer illuminating a spatial light modulator to efficiently and uniformly project light onto a photosensitive medium while providing a simpler design of the spatial light modulator in the optical printer. T... | 10/19/1999 |
| 5963018 | Automobile batteries with inherent immobilizers A battery immobilizer is described in which power provided by the battery to the ignition switch of an automobile is discontinued when the starter motor of the automobile is engaged without proper previous authorization. The authorization is provided by e... | 10/05/1999 |
| 5963017 | Calibration of the battery device for a portable computer system A capacity calibration apparatus for the battery of a portable computer system is provided. The computer system includes a main board circuit, a processor unit, a display unit, a power-supply board circuit, a battery and a parallel port interface. The cap... | 10/05/1999 |
| 5959437 | Charge and discharge control circuit To obtain a required delay time at each control using one capacitor in common, a charge and discharge control circuit includes an overcharge detecting circuit, an overdischarging circuit, and an overcurrent detecting circuit and carries out charge and dis... | 09/28/1999 |
| 5953042 | Deflecting scanning apparatus A deflecting/scanning apparatus includes a deflector for deflecting/scanning a light beam from a light source unit, an optical system for focusing the light beam deflected/scanned by the deflector onto a surface, an optical box for accommodating the defle... | 09/14/1999 |
| 5949212 | Integrated solar cell array and power regulator A power regulator circuit efficiently regulates electrical power generated by a solar cell array for satellite system load requirements and rechargeable battery needs. The power regulator circuits mounted opposite the solar panel regulate the power genera... | 09/07/1999 |
| 5949214 | Rechargeable battery pack A battery charging apparatus and method permits the recharging of the batteries of a seismic streamer depth control device or bird without access to the interior of the bird. In a preferred embodiment, a battery pack includes a coil within the bird that i... | 09/07/1999 |
| 5949219 | Optical state-of-charge monitor for batteries A method and apparatus for determining the instantaneous state-of-charge of a battery in which change in composition with discharge manifests itself as a change in optical absorption. In a lead-acid battery, the sensor comprises a fiber optic system with ... | 09/07/1999 |
| 5942877 | Portable information device and charger therefor A portable information device includes a portable main part having a clocking function, a source part which is detachably attachable to the main part and contains secondary batteries serving as a power source for the main part, and a charger which is sepa... | 08/24/1999 |
| 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 for NI-CAD battery packs. The battery pack includes a micro... | 08/17/1999 |
| 5939862 | Adaptive power battery charging apparatus An adaptive battery charger for charging batteries used in portable electronic devices. The battery charger monitors power provided from an AC adapter to the portable electronic device, and adaptively utilizes all available power from the AC adapter for c... | 08/17/1999 |
| 5936381 | Charging apparatus for car storage batteries The present invention is a charging apparatus devised to make it possible with the help of another car to start a failed engine resulted from an old storage battery or from over-charging by inserting cigar jack in a car without opening the bonnet and with... | 08/10/1999 |
| 5936385 | System monitoring the discharging period of the charging/discharging cycles of a rechargeable battery, and host device including a smart battery A system for monitoring the discharging/charging cycles of a rechargeable battery which includes adaptive calculation means for providing a predictive indication of when the battery will reach a critical discharge voltage. The adaptive calculation means i... | 08/10/1999 |
| 5936384 | Charge and discharge protection circuit and battery pack with high withstand voltage In a charge and discharge protection circuit, those transistors constituting a level shifting circuit that may receive a relatively high voltage as a source level or a drain level have a high withstand voltage construction.... | 08/10/1999 |
