Abstract: Circuitry for powering a load and charging of a battery from a power source by a smart power supply is provided. The smart power supply controls the maximum current for battery charging based in part upon variables such as the maximum rate of charge of the battery and maximum source current. The smart power supply is thus capable of providing the power requested by the load, and use the remaining power for battery charging.

Abstract: A charging method and device for a rechargeable battery to make more stable and faster full charging possible. One embodiment of a charging method for the rechargeable battery includes charging the battery by applying a constant current, and then charging the battery by applying a constant current pulse having uniform pulse width. The charging method further includes charging the battery by applying or interrupting the constant current and then applying the dynamic constant current pulse based on a voltage across terminals of the battery.

Abstract: A circuit for battery charging is provided. The circuit provides a charge current to a battery, and regulates the charge current with either linear regulation or switching regulation, based on operating conditions. In one embodiment, if the input voltage minus the battery voltage is less than a threshold (e.g. 100 mV), linear regulation is employed, and if the input voltage minus the battery voltage is greater than the threshold (e.g. 100 mV), switching regulation is employed. The threshold may be fixed, or the threshold may be adjustable based on die temperature or charge current.

Abstract: A battery pack has a rechargeable battery, a pair of externally exposed charge/discharge terminals connected to the electrodes of the rechargeable battery, and an externally exposed battery pack signal terminal for identifying the type of the battery pack. The battery pack further has a battery pack communication portion connected to the battery pack signal terminal for receiving an authenticity signal transmitted from an electrical equipment unit through the battery pack signal terminal; a random number generating portion for generating a random number based on a predetermined condition; and a battery pack control portion for generating a detection signal based on the authenticity signal received by the battery pack communication portion and the random number generated by the random number generating portion, and for transmitting the detection signal from the battery pack communication portion to the electrical equipment unit side through the battery pack signal terminal.

Abstract: The battery charging method uses a pulsed current alternately taking first and second amplitudes during first and second periods (t1, t2). At least one of the parameters, amplitude and duration, of the current during the first period (t1) is automatically servo-controlled as a function of a first value of the slope (P1) of the voltage (U), measured at the terminals of the battery to be charged. The first slope value (P1) is calculated at least at the end of the first period (t1). Likewise, a second value of the slope (P2) of the voltage (U) can be calculated at least at the end of the second period (t2) and at least one of the parameters of the current during the second period (t2) can be automatically servo-controlled as a function of the second slope value (P2). The different parameters of the pulsed charging current are thus continuously servo-controlled as a function of the voltage slope to keep the slope (P) within a range comprised between 1 mV/s and 6 mV/s.

Abstract: A charging circuit includes a pulse generator and a controller coupled to the pulse generator. The pulse generator is used to generate a plurality of pulses to control a charging switch. The controller is used to control a pulse density of the plurality of pulses. A charging current flowing through the charging switch can be adjusted according to the pulse density.

Abstract: A charging device that may perform charging with larger current is provided. The charging device comprises a switching element for increasing or decreasing charging power, a PWM controlling circuit for intermittently turning the switching element on or off, a current detecting circuit for detecting current flowing through the switching element, and a rectifying circuit for rectifying output voltage of the current detecting circuit in response to power supply voltage. The PWM controlling circuit has a limiter terminal for turning off the switching element when voltage equal to or above a determined value is input, and rectified voltage from the rectifying circuit is input to the limiter terminal. In this charging device, an amount of temperature increase of the switching element is suppressed so as to remain within a fixed range, and the charging power is not restricted unnecessarily.

Abstract: Circuitry for charging a battery includes a switch for coupling the power source to the battery. The switch is turned on and off in accordance with a periodic control signal including a plurality of periods. Each period includes a first duration during which the control signal is in a first state and a second duration during which the control signal is in a second state. The switch is turned on when the control signal is in the first state to couple the power source to the battery, and turned off when the control signal is in the second state to decouple the power source from the battery. Since the switch is periodically turned off while the battery is being charged, the average amount of heat generated by the switch is reduced, thereby preventing excessive thermal emission from the battery charging circuitry.

Abstract: A combination including a battery pack and a battery charger operable to supply a charging current to the battery pack. The battery pack includes a plurality of battery cells having a lithium-based chemistry and a present state of charge. The battery pack also includes a battery microcontroller that is operable to measure the present state of charge of at least one of the battery cells to produce battery cell present state of charge measurements. The battery charger includes a charger microcontroller that is operable to receive the battery cell present state of charge measurements from the battery microcontroller. The charger microcontroller is also operable to supply the charging current to the battery pack in pulses, wherein each pulse includes a first time interval where charging current is being supplied to the battery and a second time interval where charging current is being suspended from the battery.

Abstract: A bus power device includes a connector that is connected to a port of a host apparatus compliant with a predetermined interface standard; a current/voltage detecting unit that detects a current/voltage supplied from the host apparatus to a bus power line via the port and the connector; and a power assisting unit that assists a current to the bus power line based on a result of comparison between the current detected by the current/voltage detecting unit and a threshold current, and assists a voltage to the bus power line by an amount of shortfalls in the voltage based on a result of comparison between the voltage detected by the current/voltage detecting unit and a threshold voltage.

Abstract: A circuit for charging a battery combined with a capacitor includes a power supply adapted to be connected to the capacitor, and the battery. The circuit includes an electronic switch connected to the power supply. The electronic switch is responsive to switch between a conducting state to allow current and a non-conducting state to prevent current flow. The circuit includes a control device connected to the switch and is operable to generate a control signal to continuously switch the electronic switch between the conducting and non-conducting states to charge the battery.

Abstract: Circuits and methods for battery charging are disclosed. In one embodiment, the battery charging circuit comprises an AC to DC converter, a charging control switch, and a charger controller. The AC to DC converter provides a charging power to a battery pack. The charging control switch is coupled between the AC to DC converter and the battery pack. The charging control switch transfers the charging power to the battery pack. The charger controller detects a battery status of the battery pack and controls the charging control switch to charge the battery pack in a continuous charging mode or a pulse charging mode according to the battery status. The charger controller also controls the AC to DC converter to regulate the charging power according to the battery status.

Abstract: A charging circuit is provided. In the present invention, a capacitor and a resistor are added to the circuit near the charging switch. Due to the electrical charges stored in the capacitor, the rising and decreasing rate of the battery voltage of a rechargeable battery can be diminished during the pulse charge stage. Thereby, the probability of battery cell damage is reduced, and the safety of using the rechargeable battery is guaranteed.

Abstract: A digital device capable of recharging a rechargeable battery, comprising a consuming current detect unit for detecting a consuming current input to the digital device through an adapter, a control unit, a recharging current detect control unit for detecting the battery recharging current as the battery is recharged, and a recharging control unit for regulating the consuming current to the rechargeable battery in proportion to a pulse width modulation control signal output from the control unit and the battery recharging current detected by the recharging current detect control unit.

Abstract: A multiple cell battery charger configured in a parallel topology provides constant current charging. The multiple cell battery charger requires fewer active components than known serial battery chargers, while at the same time preventing a thermal runaway condition. The multiple cell battery charger in accordance with the present invention is a constant voltage constant current battery charger that includes a regulator for providing a regulated source of direct current (DC) voltage to the battery cells to be charged. The battery charger also includes a pair of battery terminals coupled in series with a switching device, such as a field effect transistor (FET) and optionally a battery cell charging current sensing element, forming a charging circuit. In a charging mode, the serially connected FET conducts, thus enabling the battery cell to be charged. The FETs are controlled by a microprocessor that monitors the battery cell voltage and cell charging current and optionally the cell temperature.

Abstract: An aspect of the present invention provides a circuit for generating a voltage that can be used to recharge a battery. The circuit includes an inductive voltage generator operable to generate a magnetic field when the voltage generator is energized by power, and operable to generate a voltage from the magnetic field's collapse when the voltage generator is de-energized, and a switch operable to allow the voltage generator to receive power to energize the voltage generator, and operable to disconnect the power from the voltage generator to de-energize the generator. With this circuit, a power source that generates less voltage than the fully charged capacity of a rechargeable battery can be used to recharge the battery. Also, the circuit can convert power in different forms, such as constant direct current, varying direct current, or alternating current, into a second voltage for charging a battery.

Abstract: A battery charging device includes (i) a first circuit receiving a pulse width modulated signal, (ii) a second circuit receiving the pulse width modulated signal, and (iii) a third circuit receiving the pulse width modulated signal. The first circuit generates a first input to set a maximum battery charge current produced by the battery charging device. The second circuit generates a second input to disable the battery charging device based on the pulse width modulated signal. The third circuit generates a third input to select a charging mode of the battery charging device.

Abstract: A method and an apparatus for charging a lithium-ion based rechargeable battery in a short time is provided.

Abstract: A voltage detector is connected to a connection terminal connected to one phase of an AC output of an inverter through a diode. A removable charge power supply is connected to said connection terminal and another connection terminal. A charge-power-supply connection judging circuit judges whether the charge power supply is or isn't connected, based on a charge power supply voltage detected by a voltage detector. A mode change control circuit outputs switch signal by the result of said judgment. By receiving this switch signal, the inverter controller switches the operation of the inverter between the Motor Drive mode or the Battery Charge mode. Thereby, a motor drive device detects a connecting status of an external charge power supply and steadily switches the operation of the inverter between the Motor Drive mode or the Battery Charge mode.

Abstract: A charger for a motorized tool includes a filter circuit, a rectifier circuit, a pulse width modulation (PWN) circuit, a transformer circuit, and a sensing circuit. Thus, the sensing circuit captures partial of the output voltage to compare with a reference voltage to obtain an error signal between the output voltage and the reference voltage and feeds back the error signal to the PWN circuit to change the pulse width of the PWN circuit so as to regulate the duty cycle of the power switch, so that the output voltage and current are adjusted according to the feedback error signal so as to charge the battery exactly and stably.

Abstract: A PWM controller includes a short circuit mode circuit which has input ends connecting simultaneously to a power supply input end and an output end of an output driving circuit, and an oscillator which has a temperature compensation circuit that includes a medium value multi-transistor resistor of a negative temperature coefficient and a well resistor of a positive temperature coefficient. The invention also provides a charger circuit which includes the PWM controller set forth above and a constant voltage/current control circuit coupling with the PWM controller through a transformer. A system adopted the PWM controller circuit and charger circuit of the invention does not need a voltage stabilization diode now equipped in many conventional designs. The invention provides an improved short circuit protection, eliminates low frequency harmonic waves, packages power transistors and the controller into a single TO-94, increases the cluster density and enhances the reliability of small packages.

Abstract: A NiH/NiCd (nickel hydrogen/nickel cadmium) battery charger with the function of emergency power supply unit having a main body with a charging chamber and a charging circuit positioned within the main body to allow an electric connection to the charging chamber and the power input interface. This charging control circuit is controlled by an electrical switch which divides the charging chamber into two or more parts. When the power input interface is connected, the electrical switch shuts off automatically to make the batteries in the charging chamber to be charged in groups. This is the function of charger. When the power input interface is switched off, the batteries in different circuit are joined in series to supply power as an emergency power supply unit. Therefore, with the design principle of “separate charging and common sharing”, it can protect the rechargeable batteries and provide power in lacking of power supply unit outdoors.

Abstract: A voltage detector for a battery assembly having unit cells, the voltage detector includes a low voltage system circuit and a high voltage system circuit. The low voltage system circuit includes an enable pulse output unit which outputs an enable pulse to command detection of a voltage across both terminals of the unit cell. The high voltage system circuit includes a voltage pulse output unit which output a voltage pulse showing a voltage across both terminals of the unit cell, a switch which is provided between each unit cell of the battery assembly and the voltage pulse output unit and a switch controller which conducts ON-OFF control of the switch so that the each unit cell is successively connected to the voltage pulse output unit according to the enable pulse inputted from the pulse output unit.

Abstract: A charging circuit for a secondary battery includes a constant-voltage circuit part outputting one of a plurality of predetermined constant voltages and charges the secondary battery by applying the constant voltage thereto, a detection circuit part detecting a battery voltage of the secondary battery, and a control circuit part controlling the selection of the constant-voltage in response to the detected battery voltage.

Abstract: An exemplary charging circuit (200) includes for charging a load component (210) includes a power supply unit (220), a feedback circuit, and a sampling resistor (230). The power supply unit includes a pulse width modulation circuit (221) and a power output terminal (222) configured to output a direct current supply. The feedback circuit includes an amplifying comparator (241), a constant voltage circuit (242), a transistor (243), and an optoelectrical coupler (244). The constant voltage circuit is configured to generate a reference voltage and apply the reference voltage to a negative input terminal of the amplifier comparator. An output terminal of the amplifier comparator is connected to the pulse width modulation circuit via the transistor and the optoelectrical coupler. The sampling resistor includes a current sampling terminal connected to a positive input terminal of the amplifier comparator.

Abstract: A sense amplifier adapted to amplify a voltage signal representative of a charging current provided to a rechargeable battery. The sense amplifier may include a p-type input sense amplifier and an n-type input sense amplifier, The p-type input sense amplifier may be enabled and the n-type input sense amplifier may be disabled if a battery voltage level of the rechargeable battery is less than an under voltage threshold level. The p-type input sense amplifier may be disabled and the n-type input sense amplifier may be enabled if the battery voltage level is greater than or equal to the under voltage threshold level. A related method and an electronic device having a sense amplifier consistent with an embodiment are also provided.

Abstract: A method and system for battery charging. In some aspects, a battery charger including at least one terminal to electrically connect to a lithium-based chemistry battery pack and a controller operable to provide a charging current to the battery pack through the at least one terminal. The controller is operable to select a threshold for a charging function according to a nominal voltage of the battery pack.

Abstract: The present invention discloses a method and system for the rapid charging of a lithium-ion battery. A charging algorithm is applied to modify a charging pulses frequency, duty cycle and amplitude depending on the measurement of the battery temperature. The charging algorithm is based on the chemical Diffusion Coefficient of the battery, with this Diffusion Coefficient, in turn, dependent on the type of solvent system, the type of electrolyte, and the temperature of the battery.

Abstract: Disclosed is a portable charging apparatus having a built-in charging battery, which can easily charge the charging battery of a cellular phone even in a place where home AC power or car power cannot be used and can be used for various kinds of portable equipment by means of using one charger. The present invention can charge a charging battery of a cellular phone using home AC power or car power. Furthermore, the charger of the present invention can easily charge the charging batteries of various digital mobile devices such as cellular phones using an internal charging battery included therein even in a place where home AC power or car power cannot be used.

Abstract: A method for charging at least one rechargeable battery is described where a plurality of short duration high magnitude positive current pulses are delivered to the battery. Each pulse is followed by a period of positive average charging current and then a negative current pulse. This cycle is repeated a number of times followed by a large negative current pulse and possibly a rest period. Both the duration and magnitude of each pulse or period may be pseudo randomly varied.

Abstract: In a method and system for generating a regulated direct current (DC) voltage output of a voltage regulator module (VRM) to power a device of the information handling system, an activity input, which is indicative of levels of activity of a processor included in the device, is received by the controller module. The controller module selects a first switching frequency from a plurality of switching frequencies of the VRM. The first switching frequency corresponds to a first level of activity. A charge switch is operable to receive a DC voltage input and generate a switched IDC voltage output having the first switching frequency. A discharge switch is operable to provide a discharge path for the switched DC voltage signal while the charge switch is open. A filter module is operable to filter the first switching frequency from the switched DC voltage output and generate the regulated DC voltage output.

Abstract: A battery charger that adjusts and applies charging pulses to a battery such that one or more battery parameter is regulated. Terminal voltage of the battery, relative to the battery's quiescent voltage, during the charge application is one such battery parameter indicative of the battery's charge absorption rate. Maintaining the charging voltage at a predetermined value during the charging process is achieved by adjusting the charging pulse both amplitude-wise and temporally. The adjustment of the charging pulse is performed such that a high rate of charge input into the battery is maintained during the charging process.

Abstract: In a method and system for generating a regulated direct current (DC) voltage output of a voltage regulator module (VRM) to power a device of the information handling system, an activity input, which is indicative of levels of activity of a processor included in the device, is received by the controller module. The controller module selects a first switching frequency from a plurality of switching frequencies of the VRM. The first switching frequency corresponds to a first level of activity. A charge switch is operable to receive a DC voltage input and generate a switched DC voltage output having the first switching frequency. A discharge switch is operable to provide a discharge path for the switched DC voltage signal while the charge switch is open. A filter module is operable to filter the first switching frequency from the switched DC voltage output and generate the regulated DC voltage output.

Abstract: In accordance with the teachings described herein, systems and methods are provided for charging a rechargeable power source in a mobile device through a USB port. A power converter may be used to receive an input voltage from an external power source and generate a charger output having a regulated voltage. A signal generator may be used to generate a charger configuration signal having pre-selected waveform characteristics that are selected to identify operating characteristics of the charging apparatus. A USB connector may be used for coupling the charger output and charger configuration signal to the USB port on the mobile device. The USB connector may include a voltage bus (Vbus) contact coupled to the charger output, a positive data (D+) contact coupled to the charger configuration signal, and a negative data (D−) contact coupled to the charger configuration signal.

Abstract: The present invention provides a battery charger of mobile phone capable of charging a battery rapidly and fully, by charging the battery rapidly with pulse up to a predetermined level of the charging capacity of the battery, and then by charging with constant voltage until the battery is fully charged, and a charging method for the same; the battery charger comprising: a main control means, which controls pulse voltage charging and constant voltage charging based on the charging state of the battery; a constant voltage charging control means, which controls charging of the battery with constant voltage under control of the above main control means; a pulse charging control means, which detects charging voltage of the battery and controls charging of the battery with pulse voltage based on the detected charging voltage under control of the above main control means; and a charging means, which charges the battery by outputting pulse voltage or constant voltage after DC power has been applied under control of t

Abstract: The present invention provides a method of charging a rechargeable device (108) and a charging apparatus wherein the rechargeable device (108) is connected to a battery connection port (107) and ground (106), an external DC source having an input voltage (114) is connected to an input resistor (101) of a charging apparatus, a current reference value (109) and a voltage reference value (110) are fed to a control unit (104), a duty cycle (d) is determined in accordance with the current reference value (109) and the voltage reference value (110) fed to the control unit (104), and, using the duty cycle (d), an output voltage (402, 403) applied to the rechargeable device (108) is switched between a minimum output voltage (404) and a maximum output voltage (405) dependent on the current reference value (109) an the voltage reference value (110) by means of a charging switch (103).

Abstract: An active switch for electrically connecting and disconnecting a power source such as a solar array to a charge storage device is disclosed. The active switch allows a minimal amount of reverse back current flow from the charge storage device to the power source having a low on-resistance.

Abstract: A circuit and method are disclosed for pulse charging a battery. In this method, the duration of the charging interval of the pulse is governed by the time required to reach an upper threshold voltage. The duration of the non-charging interval is a function of the ionic relaxation of the battery. One preferred embodiment includes a method in which the charging interval is initiated at a voltage that corresponds to the current state of charge of the cell. For example, when the upper threshold is reached, charging is suspended. A microprocessor then determines the state of charge by way of a fuel gauge. If a cell is 70% charged, for instance, an on voltage corresponding to this state of charge is selected. When the cell reaches the on voltage, the charging interval is again initiated. Other alternatives to this method include sensing a slope to determine when ionic relaxation has occurred, and a mathematical approximation of the method.

Abstract: A battery charger that adjusts and applies charging pulses to a battery such that one or more battery parameter is regulated. Terminal voltage of the battery, relative to the battery's quiescent voltage, during the charge application is one such battery parameter indicative of the battery's charge absorption rate. Maintaining the charging voltage at a predetermined value during the charging process is achieved by adjusting the charging pulse both amplitude-wise and temporally. The adjustment of the charging pulse is performed such that a high rate of charge input into the battery is maintained during the charging process.

Abstract: A voltage mode battery charging system is provided that includes a battery current control section, a battery voltage control section, and a power control section. The battery current control section and battery voltage control section each generate signals indicative of the battery charging current and battery voltage, respectively. The power control section generates a signal indicative of the power available from an adapter source. Each of these signals is combined at common node, and if any of these sections exceeds a threshold, battery charging current is decreased.

Abstract: A method of charging a battery capable of eliminating the occurrence of battery memory effect thereby fully utilizing the chargeable space inside the battery to achieve a saturated status mainly starts to discharge the battery in an impulse wave, then uses an extremely small impulse current to start the charge. The impulse current increases gradually and finally reaches a steady change range. Zero or more than zero small impulse wave exists between every two charging impulse waves.

Abstract: A battery power source device is provided, capable of detecting a charge/discharge current flowing through a secondary battery mounted on an electric vehicle, etc., at low cost, with high reliability, and with high precision. A voltage signal generated across a current detection resistor connected to an assembled battery in series is transmitted to a battery ECU via a transmission means. At the time of discharge from the assembled battery, the voltage signal is detected as a pulse signal using a discharge current detection unit, a first capacitor, and a pulse generation unit during discharge. At the time of discharge, the voltage signal is detected as a pulse signal using a charge current detection unit, a second capacitor, and a pulse generation unit during charge. Event counters calculate this pulse signal at the time of discharge and charge as a current flowing through the assembled battery.

Abstract: A surgical/medical irrigator with a handpiece in which there is a pump from which irrigating fluid is discharged. The irrigating fluid is discharged from a discharge tube attached to the handpiece. Irrigating fluid is removed from the site to which it is applied through a suction tube also attached to the handpiece. A splash shield is removably attached to the ends of the discharge and suction tubes to limit fluid discharge. The splash shield is formed with a discharge chamber into which the fluid from the discharge chamber is discharged. The splash shield has a bore that leads from the discharge chamber to the suction tube through which fluid is drawn away from the discharge chamber. Seals between the discharge and suction tubes and the splash shield prevent fluid flow between the tubes and the splash shield.

Abstract: An apparatus and method for providing enhanced charging efficiency and a reduction in charge system cost when charging segmented batteries. A current switching device routes charging current from a charge source to a selected segment of the battery, while the remaining segments are in a relaxation mode and are not receiving charge current. A segment selection device periodically reconfigures the current switching device to route charging current to another segment of the battery. As a result, each of the series-connected cells of the battery are subject to alternating charging and relaxation periods until the battery has achieved a desired state of charge.

Abstract: A method and apparatus are disclosed for recharging a battery in the presence of a load. The present invention utilizes the battery itself as an averaging element to maintain the battery at the desired threshold voltage, VT (on average) as the current charging source is selectively turned on and off. Generally, the present invention measures the battery voltage at the end of each interval just before the current source is turned on or off. A calculation is performed for each charging cycle (current on and off) to determine the duty cycle for the subsequent cycle. The calculated duty cycle is the percentage of time that the current source should be applied for the next cycle. The calculated duty cycle is based on the difference between the actual battery voltage and the desired voltage. In this manner, the on and off times are modulated by the present invention such that the average battery voltage, Vbat, is the desired threshold voltage, VT.

Abstract: A method for charging a battery, such as a lithium based battery, which applies different charge pulses and discharge pulses to the battery, takes voltage measurements during those charge pulses, discharge pulses, and rest periods between the charge pulses and discharge pulses, and determines whether to terminate or to continue charging the battery. The full sequence of charge pulses, discharge pulses, and rest periods, includes a plurality of charge pulses (1), separated by rest periods (2) and followed by a rest period (3). This is then followed by a plurality of discharge pulses (4), separated by rest periods (5) and followed by a rest period (6). This is then followed by a plurality of extended charge pulses (7), separated by rest periods (8) and followed by a rest period (9). Then another discharge pulse (10) is applied, followed by a rest period (11).

Abstract: A coupling circuit for charging a pulse forming network (PFN) or capacitor load to a precise voltage is disclosed. The coupling circuit is connected to a DC input voltage source. The circuit includes a charging transformer, having an input winding connected in series with a switch circuit and the DC voltage source. The output winding of the charging transformer is connected to the PFN or capacitor load. A charging inductor is placed in series with the output winding. A control circuit monitors and calculates the total amount of energy present at the load and the charging inductor, and causes the switch circuit to open when the total charge reaches a predefined level, thereby allowing charge stored in the inductor to be transferred to the PFN or capacitor load.

Abstract: A battery charging circuit, a method of charging a battery and a battery-powered electronic device employing the circuit or the method. In one embodiment, the battery charging circuit includes a charging switch coupled between a base interface of the battery-powered electronic device and a battery thereof to be charged. When closed, the charging switch provides a conductive path for charge current from the base interface to the battery. The charge current is based on an input voltage of the battery charging circuit and a voltage of the battery. The battery charging circuit further includes a controller that modulates the charging switch at a duty cycle that at least in part determines a rate at which the charge current is delivered to the battery thereby to compensate at least in part for variations in the input voltage.

Abstract: A charge circuit adapted to be used in an information system for charging a battery mounted in the information system, the information system being electrically coupled to a power source. The charge circuit includes a pulse width modulation controller electrically coupled to the battery for controlling a charge current to be delivered to the battery, and a system current detecting feedback circuit electrically coupled to the power source and to the pulse width modulation controller for outputting a control signal to the pulse width modulation controller in response to the comparison between a current outputted from the power source and a threshold value. The present invention also a charging method for an information system.

Abstract: The current invention is a device for improving the charging process for all lead acid batteries. It also provides superior maintenance and conditioning of all lead acid batteries used in fossil fuel powered automobiles, any marine application, trucks, forklifts, telecommunications, aircraft, uninterruptible power supplies (UPS), golf carts, electric cars and many other similar applications. The current invention, by means of generating a high frequency pulse of sufficient amplitude and repetition rate, fed through a set of leads of sufficient size, removes lead plate sulfate deposits that plague virtually all lead acid batteries. By removing said deposits maximum available battery power is obtained. There is also a subsequent increase in battery life. The current invention uses an all solid state design.