Abstract: An apparatus includes a sense module configured to be coupled to at least one power supply, where the sense module has a first leg. The apparatus also includes a replica module having a second leg, where the first and second legs have a common structure. The apparatus further includes a feedback loop configured to cause an output voltage across terminals of the replica module to at least substantially equal an input voltage across terminals of the sense module based on sense currents in the first and second legs. At least one cascode stage coupled to the sense module can be configured to reduce a voltage at which one or more signals from the sense module are referenced. One or more trim units can be used to reduce a gain error and/or an offset error between the input voltage and the output voltage.

Abstract: Provided is a charge control system of a battery pack. The charge control system includes a charge unit, a battery management unit, a charger management unit, and a voltage level shift unit. The charge unit charges a battery. The battery management unit includes first and second ports, determines one of a charge mode and charge stop mode of the battery according to whether the charge unit is disabled, and controls outputs of the first and second ports according to the determined result. The charger management unit is connected to a data input terminal of a charger, and controls an operation of the charger according to a voltage level of the data input terminal. The voltage level shift unit shifts a voltage level of the data input terminal according to the outputs of the first and second ports.

Abstract: A tool discharges one battery pack and a charger simultaneously charges another battery pack to provide for continuous and circular operation of the tool. The ratio of the discharging time to the charging time is approximately 25:35.

Abstract: A charge system is disclosed. A charge system includes a switching device and a controller. The switching device performs switching of a DC input voltage at a predetermined switching frequency to generate an output voltage, and the output voltage being utilized for charging said battery. The controller allows the switching device to operate at a first switching frequency immediately after starting of charge and at a second switching frequency when a frequency changing condition holds. The second switching frequency is higher than that of first switching frequency.

Abstract: A power supply apparatus for supplying electric power wirelessly to a power receiving apparatus which charges a battery informs charging information indicating a charging state of the power receiving apparatus, if a position of the power receiving apparatus is changed to more than the predetermined value.

Abstract: The present invention provides a battery management device and a portable computer, the battery management device is for managing the rechargeable battery provided in a portable computer, the portable computer is provided with a charge circuit for charging a battery, the battery management device comprises: a discharge circuit for discharge the battery; a acquiring module for acquire the mode determining parameter; a first determining module for judging whether the battery storage mode is entered according to the mode determining parameter; a first control module for controlling the charge circuit or the discharge circuit to control the amount of electrical charge of the battery so that the amount of electrical charge of the battery is lower than the second amount of electrical charge threshold in the battery storage mode; the performance of the battery when deposited with the amount of electrical charge lower than the second amount of electrical charge threshold is better than the performance when deposited

Abstract: A method and apparatus for charging a battery is provided. The apparatus includes: a constant current circuit, a constant voltage circuit and a control circuit. The control circuit is adapted to control the constant current circuit to perform constant current charging to the battery; after a battery voltage during the constant current charging reaches a preset charging limited voltage, control the constant voltage circuit to perform constant voltage charging to the battery; after a charging current during the constant voltage charging becomes smaller than or equal to a predetermined threshold, control the battery to be charged by pulse charging until an open circuit voltage of the battery is larger than or equal to a preset voltage threshold.

Abstract: A power converter circuit is coupled to an AC power input, a backup power input, a first capacitive element and a second capacitive element. The power converter circuit is configured to, in a line mode of operation and during a positive portion of an AC input voltage, convert the AC input voltage into a positive DC output voltage through a first inductive element and provide a charging voltage to a backup power source through a second inductive element using a negative DC output voltage stored in the second capacitive element, and, in the line mode of operation and during a negative portion of the AC input, convert the AC input voltage into the negative DC output voltage through the second inductive element and provide the charging voltage to the backup power source through the first inductive element using the positive DC output voltage stored in the first capacitive element.

Abstract: A battery warming circuit is a circuit installed in a vehicle provided with an inverter circuit, which is supplied with direct current electrical power from a secondary battery, and a 3-phase alternating current motor, and this circuit includes: a switch control unit, which has first and second terminals connected to control terminals of first and second switching elements, and controls turning the first and second switching elements on and off; an accumulation unit which has a third terminal connected to the other end of a specific coil, and accumulates back electromotive force generated in the specific coil by turning the second switching element on and off, with the first switching element being turned on; and a charging control unit which is provided between the positive electrode of the secondary battery and the accumulation unit, and supplies electrical power accumulated in the accumulation unit to the secondary battery.

Abstract: An electrochemical test cell, containing an anode comprising a metal as an active component; a cathode comprising a porous chemically inert tube containing an active material compatible with the metal of the anode; and an electrolyte; wherein the only metal in contact with the electrolyte is the metal of the anode, is provided. This test cell is useful in a method to evaluate various combinations of materials for suitability as a combination for preparation of a battery.

Abstract: A method for operating a battery system having multiple battery packs. The method includes decoupling the output of a discharged battery pack from the vehicle load, reducing the voltage between an output of a charged battery pack and the vehicle load prior to coupling the output of the charged battery pack to the vehicle load.

Abstract: The life of a lead acid storage battery is extended by changing an over-frequency equalized charge interval performed on a lead acid storage battery, in accordance with a transition situation of a state of charge (SOC) of the lead acid storage battery. The lead acid storage battery is also made to be advantageous in terms of cost by reducing the equalized charge with a low degree of urgency to reduce the power and cost for equalized charge, and by reducing the number of stops of a natural energy storage system. A lead acid storage battery and a lead acid storage battery system whose operational management can be easily performed are achieved by a method in which the future timing when the equalized charge is performed can be grasped by people operating the lead acid storage battery.

Abstract: The invention relates to an evaluation circuit for detecting the voltage in battery cells of a battery system which are preferably connected in series. The evaluation circuit includes serially connected resistors, the number of which is equal to the number of battery cells for which the voltage is to be detected. One of the resistors is associated with each of the battery cells.

Abstract: A method in a controller for energizing a chain-link converter including one or more phase legs, each phase leg including a number of series-connected converter cells, each converter cell including four valves arranged in an H-bridge connection with a DC capacitor. Each valve in turn includes a semiconductor switch in parallel with a diode. The method includes the steps of: charging the DC capacitor of each converter cell to a voltage level at which the semiconductor switches are controllable but below their nominal voltage; diagnosing the converter cells so as to detect failed components thereof; bypassing faulty components in a controlled manner; charging the DC capacitors to their nominal voltage. The invention also relates to a controller, computer programs and computer program products.

Abstract: A universal power generating system, having a rechargeable battery bank with a plurality of rechargeable batteries; a computer; and an outside power source. The outside power source has a shaft, propellers are fixedly mounted onto the shaft. The shaft extends through electromagnetic generator systems. The universal power generating system also has at least one ultracapacitor and electrical circuitry. Fixedly mounted onto the shaft are hubs, each of the hubs have fan blades mounted thereon and permanent magnetic elements. The fan blades are shaped to cause the hubs, and therefore the shaft to rotate by wind force. The electromagnetic generator systems convert mechanical energy generated from rotation of the shaft to electrical energy that flows to a rotary alternative inverter, to a transformer and a power supply through electrical wiring and to the rechargeable battery bank. The at least one ultracapacitor provides power for electrical components of a vehicle.

Abstract: The disclosed embodiments provide a system that manages use of a battery corresponding to a high-voltage lithium-polymer battery in a portable electronic device. During operation, the system monitors a cycle number of the battery during use of the battery with the portable electronic device, wherein the cycle number corresponds to a number of charge-discharge cycles of the battery. If the cycle number exceeds one or more cycle number thresholds, the system modifies a charging technique for the battery to manage swelling in the battery and use of the battery with the portable electronic device.

Abstract: A battery management system for a battery pack comprises a battery module and a controller. The controller comprises a voltage detection and control circuit, wherein the controller comprises a voltage to current converter. A cell voltage is converted to current and produces a voltage detected at an input to one or more logic devices. The level of voltage detected is dependent upon the current output of the voltage to current converter and a threshold current. The output of the one or more logic devices is received by a controller, and the controller is operable to control the charging and discharging of the battery cell based on the logic device output.

Abstract: A portable self-contained photovoltaic device is provided with a hollow cylindrical support in two substantially coaxial portions assembled to one another. The device further includes a rolled flexible photovoltaic collector and a battery mounted in the first portion of the coaxial portions and designed to store electric energy produced by the photovoltaic collector. An electronic control circuit is mounted in the first portion for managing the charging of the battery. Several LED lamps are stored inside the photovoltaic collector and placed inside the second portion of the coaxial portions.

Abstract: A battery management method of an electrical device, including an internal power source and a battery management unit, includes the following steps. The battery management unit detects whether the electrical device is electrically connected with an external power source. If the electrical device is electrically connected with the external power source, the battery management unit utilizes a timer to determine whether the electrical device has been electrically connected with the external power source for a predetermined time. If the electrical device has been electrically connected with the external power source for the predetermined time, the battery management unit resets the timer and controls the internal power source to discharge fast.

Abstract: The invention relates to a method for determining a characteristic status parameter of a memory unit via an electric circuit arrangement. In the circuit arrangement at least one inductive component and at least one capacitive component are arranged, forming a tuned circuit with the memory unit. The method has the following steps of energizing the tend circuit by temporary charging of the capacitive component, the energizing being carried out by an energizing device electrically supplied by the memory unit, and determining a time-dependent voltage change at the capacitive component after terminating the energizing and determining the characteristic status parameter from the time-dependence of the voltage change. The invention further relates to a corresponding electrical circuit arrangement and an electrical memory, including such a circuit arrangement.