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6771048 |
Battery state monitoring circuit
A battery apparatus having a long duration (use time period) in which when a voltage of secondary batteries is a hysteresis voltage, in response to a charge inhibition signal outputted from a...
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6768287 |
System for centrally monitoring state information of batteries
A battery monitoring and control unit 52 monitors a battery 51 mounted in each of a plurality of terminals installed in a retail store. Total operating time during which the terminal has been...
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6768288 |
Circuit for detecting low battery condition on an electronic device with a changing load
A method to more accurately monitor remaining battery life under varying load conditions. The measured battery voltage is adjusted for the current load and then used to determine the remaining...
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6765369 |
Apparatus and method for managing power of a battery
Provided are an apparatus and method for managing power, and more particularly, an apparatus and method for stably managing power by comparing a predetermined reference voltage level with a battery...
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6759830 |
Method of precisely estimating effective full-charge capacity of secondary battery
The invention provides a method of precisely estimating the effective full-discharge capacity of a secondary battery. That effective full-discharge capacity degrades as the secondary battery is...
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6756768 |
Method and apparatus for computing remaining battery capacity utilizing battery discharge capacity
Remaining battery capacity is computed by computing battery discharge capacity from an integrated value of a product of discharge current and voltage to find remaining battery capacity via energy...
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6753625 |
Method and apparatus for implementing programmable battery shut off
A method, apparatus and computer program product are provided for implementing programmable battery shut in an electronic device system. A device battery consumption configuration file is stored....
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6744698 |
Battery powered electronic device and control method therefor
A first control unit 110 and second control unit 120 are disposed to a portable data terminal 100 having a heavy load group 140 and light load group 150 . The first control unit 110 ...
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6737831 |
Method and apparatus using a circuit model to evaluate cell/battery parameters
Testing apparatus senses the time-varying electrical response of an electrochemical cell/battery to time-varying electrical excitation. The cell/battery may, or may not, be in service. Computation...
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6727708 |
Battery monitoring system
A battery monitoring system is disclosed. The system comprises a means for acquiring a value representative of a first period of time during which the battery will deliver a sufficient amount of...
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6696818 |
Method and unit for computing charging efficiency and charged electrical quantity of battery
A charging efficiency, which is a ratio of an electrical quantity charged in a battery as an electromotive force to a total electrical quantity supplied to the battery, is computed at a plurality...
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6693577 |
Integration type A/D conversion method, integration type A/D converter, and battery charger utilizing such converter
In the invention, an integrator integrates a current indicative of an input signal to generate at its output end a voltage (referred to as integral output voltage) by means of a condenser. At a...
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6686723 |
Charging circuit for deeply discharged cells
The invention is directed towards a charging circuit for charging a cell that may be deeply discharged. A primary charging circuit charges the cell when the cell is not deeply discharged. A deeply...
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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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6677729 |
Method and unit for computing voltage drop divided along factors for battery
A discharge current and a voltage between a pair of terminals of a battery while a rush current is flowing in a load electrically connected to the pair of the terminals. The rush current simply...
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6674266 |
Method for determining the operating state of an energy-storage battery
A method for determining the operating state of an energy-storage battery in assumed temperature and state of charge conditions, which has the following steps: a) measurement of a temperature...
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6670790 |
Power switch for battery protection
A new battery charging, discharging, and protection circuit is achieved. The circuit comprises, first, a FET switch having gate, source, drain, and bulk. The FET switch may comprise either a NMOS...
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6664764 |
Apparatus and method for detecting a battery use state and mitigating battery deterioration
A power supply apparatus is described in which one can suppress deterioration thereof when in preservation at a relatively low cost and with high reliability, obtain a charge control apparatus and...
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6664763 |
System for managing power to an implanted device based on operating time, current drain and battery capacity
The method and system manage power supplied from a charging circuit to a power source in an implantable medical device utilizing measurements of current drain; measurements of elapsed time since...
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6661201 |
Method for controlling battery charge and discharge
The present invention provides a method for controlling battery charging and discharging in which a battery is charged and discharged such that a SOC (state of charge) value of the battery is...
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6661200 |
Rechargeable power supply system and method of protection against abnormal charging
An intelligent battery comprising a battery cell for charging and discharging; a voltage detection circuit for detecting voltage of the battery cell; a current detection circuit for detecting...
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6661231 |
Battery capacity calculating method and device therefor
A method and apparatus are provided, by which a state of charge of a battery is accurately computed without being influenced by the polarization effect. An estimated voltage of the battery 13 in...
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6661202 |
Degradation degree computing method and unit for battery
A base resistance of the battery is obtained by cyclically measuring a discharge current and a voltage between a pair of terminals of the battery, while a rush current is flowing in an electric...
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6653816 |
Battery with embedded power management
This invention includes a power management method and apparatus for portable electronic devices, like cellular phones for example, to which accessories may be attached. These accessories include...
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6653819 |
Refresh charge control device and method
A refresh charge control device which counts a time after achieving a fully charged condition of a battery by last refresh charge and an accumulative value of a charge and discharge electric...
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6653817 |
State-of-charge detection device for a battery
A method and apparatus for improving estimation of battery impedance when determining the state of charge of a battery including injecting a wide spectrum signal continuously across a battery when...
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6653818 |
Method for predicting the equilibrated open-circuit voltage of an electrochemical energy store
In a method for predicting the equilibrated open-circuit voltage of an electrochemical energy store by measuring the voltage settling response Uo(t) in a load-free period, a formulaic relationship...
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6650089 |
Control circuit for multiple battery systems with capacity gauge on end equipment
A capacity gauge is provided that measures a selected battery capacity of a plurality of batteries in a multiple battery system. A capacity gauge and a battery current sense resistor reside on the...
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6646419 |
State of charge algorithm for lead-acid battery in a hybrid electric vehicle
A method and apparatus for determining the state of charge of a lead-acid battery. The present invention includes steps to determine a current-based state of charge while accounting for such...
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6646420 |
Method of interrupting and dynamically switching ranges to improve battery charge measurement range in a sigma delta converter
A method of improving the battery charge measurement range in a sigma delta converter associated with portable applications such as a cell phone is implemented by interruption of the sigma delta...
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6646421 |
Method and apparatus for controlling residual battery capacity of secondary battery
A method for controlling a residual battery capacity of a secondary battery, by which the precision of the energy management of the system can be improved substantially, is provided. A current...
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6642719 |
Device for judging life of auxiliary battery
The depth of discharge of an auxiliary battery 6 is calculated, and the lifetime of the auxiliary battery 6 is determined based on the discharge. characteristic of the calculated one of...
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6639386 |
Rechargeable battery device equipped with life determination function
A rechargeable battery device includes battery voltage detection means which detects the terminal voltage of a rechargeable battery comprising a nickel hydride metal battery and switching means...
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6639407 |
Charging/discharging electrical energy indication apparatus and electrical energy calculation method for use in the apparatus
A charging/discharging electrical energy indication apparatus and electrical energy calculation method in which charging/discharging current and end voltage of the battery are sampled at a fixed...
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6639385 |
State of charge method and apparatus
A method for determining state of charge (SOC) of a battery system based upon an equivalent circuit of the battery system. A potential and resistance of the equivalent circuit are computed. The...
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6633153 |
Under voltage protection for a starter/alternator
The method is directed to preserve the starter/alternator in an IC engine installation from potential failure owing to insufficient electrical charge in the system energy storage device. The system...
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6630814 |
Method and apparatus for calibrating a rechargeable battery
Method and apparatus for calibrating a rechargeable battery for mobile telephones and other electronic devices. Calibration is accomplished during a process of completely charging the battery by...
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6630813 |
Method and apparatus for monitoring the state of the battery of a hybrid electric vehicle
A system ( 40 ) for an automotive vehicle has a temperature sensor ( 90 ) generating a temperature signal indicative of the temperature outside the vehicle and a battery. A battery controller ( 54...
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6625552 |
Battery fuel gauge for display in battery-powered equipment
A method and an apparatus for informing a system user that the full charge capacity of the battery is less than the design capacity. One horizontal fuel gauge icon for each battery is displayed on...
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6608468 |
Battery pack compensating a cell voltage, a charge and discharge current and temperature data, by using a built-in CPU for the battery pack
A battery pack containing a CPU and allowing correction of measured data is provided. The CPU has, at least, a main program for obtaining data concerning the voltage of each cell, charge/discharge...
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6608482 |
Battery control method for hybrid vehicle
A battery control system is provided which charges or discharges a storage battery installed in a hybrid vehicle to bring a state-of-charge of the storage battery into agreement with a target one....
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6583604 |
Battery capacity recovery apparatus and method
A battery capacity recovery apparatus and method thereof periodically conducts discharge and recharge operations for a battery used in a wireless telephone to prevent a memory effect on the...
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6583592 |
Control apparatus for hybrid vehicle
A control apparatus enhances charge and discharge performance of a main battery in a low temperature environment, extends the life of the main battery and improves the reliability of the whole...
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6577104 |
Apparatus and methods for determining appropriate timing for recharging rechargeable batteries
When rechargeable batteries have been discharged to a selected voltage reference level, LED 29 (and/or buzzer BZ) and controller 32 may warn the operator that the rechargable batteries should...
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6573687 |
Charging/discharging control method for secondary battery
A battery pack is formed by serially connecting a plurality of cells, that are individually constructed as rechargeable batteries. Charging and discharging of this battery pack are controlled such...
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6563318 |
Detecting method for detecting internal state of a rechargeable battery, detecting device for practicing said detecting method, and instrument provided with said detecting device
A detecting method for detecting an internal state of an inspective rechargeable battery (B a ), said internal state including a deterioration state, an electricity storable capacity, a remaining...
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6556020 |
Battery state of charge indicator
A state-of-charge indicator system monitors the battery current and voltage during operation of a lift truck. Selected current and voltage samples are used to calculate the internal battery...
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6549014 |
Battery monitoring method and apparatus
Activity based battery monitoring is carried out with a minimal requirement for data memory capacity by determining events defined between changes in the battery states of charge, discharge and...
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6545449 |
Method for controlling charge to secondary battery for automated guided vehicle
A method for controlling charge preventing an operation of a valve during charging and suppressing the false detection of the upper limit charging voltage due to the memory effect at the charge...
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6545447 |
Method and apparatus for placing a battery pack that is in a usable mode into a storage sleep-mode ensuring long storage
A method and apparatus for placing a battery pack into a storage sleep-mode is provided. The battery pack may be set into a storage sleep-mode when the cell is in a usable mode. After being placed...
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