5299 results about "Charge voltage" patented technology

A Single Electron MOS Memory (SEMM), in which one bit of information is represented by storing only one electron, has been demonstrated at room temperature. The SEMM is a floating gate Metal-Oxide-Semiconductor (MOS) transistor in silicon with a channel width (about 10 nanometers) which is smaller than the Debye screening length of a single electron stored on the floating gate, and a nanoscale polysilicon dot (about 7 nanometers by 7 nanometers by 2 nanometers) as the floating gate which is positioned between the channel and the control gate. An electron stored on the floating gate can screen the entire channel from the potential on the control gate, and lead to: (i) a discrete shift in the threshold voltage; (ii) a staircase relation between the charging voltage and the shift; and (iii) a self-limiting charging process. The structure and fabrication of the SEMM is well adapted to the manufacture of ultra large-scale integrated circuits.

A display device is provided, including light emitting elements, first switching transistors transmitting data signals in response to scanning signals, second switching transistors transmitting a reverse bias voltage in response to a switching signal, capacitors charging voltages based on the data signals and discharging based on the reverse bias voltage; and driving transistors, each driving a transistor connected to a driving voltage and turning on and off in response to the voltage charged in the capacitor to connect and disconnect a signal passage from the driving voltage to the light emitting element.

A light-emitting element capable of emitting light having a preferred gradation level depending on display data. During a precharge period, a data driver applies a precharge voltage to a capacitor via a data line. After the application of the precharge voltage, a voltage converter reads a first reference voltage Vref(t1) and a second reference voltage Vref(t2) to generate a compensation voltage based on a difference between the respective reference voltages. Based on the compensation voltage, a voltage calculator compensates an original gradation level voltage Vorg having a value in accordance with display data generated by a gradation level voltage generator. The voltage calculator generates a compensated gradation level voltage Vpix corresponding to a variation amount of an element characteristic for a transistor Tr13 for driving light emission to apply the compensated gradation level voltage Vpix to a data line Ld.

The invention belongs to the technical field of charging, and provides a charging device of electronic equipment and a power adapter of the charging device. In the process of charging a battery in a conventional charging mode after the power adapter is powered on or resets, when the output current value of the power adapter is within the conventional current range at a preset time interval, the power adapter is in quick charging inquiry communication with the electronic equipment; after the electronic equipment sends a quick charging instruction to the power adapter, the power adapter adjusts the output voltage according to the battery voltage information fed back by the electronic equipment, and when the output voltage meets the quick charging voltage condition preset by the electronic equipment, the power adapter adjusts the output current and the output voltage to charge the battery according to the quick charging mode, and therefore the purpose of quickly charging the battery to shorten the charging time is achieved.

Stationary and on-board battery chargers, methods of charging batteries, electric-vehicle chargers, and vehicles with chargers, including electric vehicles and hybrid electric vehicles. Chargers may automatically charge at the correct battery voltage for various types of batteries. Chargers have variable AC power supplies controlled by digital controllers, isolation transformers, and rectifiers. Transformers may be foil-type, and may have copper foil. Power supplies may be variable-frequency generators and the controllers may control the frequency. Electric vehicle chargers may have card readers, and vehicles may have batteries and a charger. Methods of charging include identifying the battery type and gradually increasing the charging at different rates of increase while monitoring charging voltage, charging current, or both, until a current lid is reached. Charging may occur at constant current and then at constant voltage.

Stationary and on-board battery chargers, methods of charging batteries, electric-vehicle chargers, and vehicles with chargers, including electric vehicles and hybrid electric vehicles. Chargers may automatically charge at the correct battery voltage for various types of batteries. Chargers have variable AC power supplies controlled by digital controllers, isolation transformers, and rectifiers. Transformers may be foil-type, and may have copper foil. Power supplies may be variable-frequency generators and the controllers may control the frequency. Use of the variable frequency generator supply facilitates reduced component size and weight and better battery charging performance. Electric vehicle chargers may have card readers, and vehicles may have batteries and a charger. Methods of charging include identifying the battery type and gradually increasing the charging at different rates of increase while monitoring charging voltage, charging current, or both, until a current lid is reached. Charging may occur at constant current and then at constant voltage.

A device and method for harvesting, generating, storing, and delivering energy to a load, particularly for remote or inaccessible applications. The device preferably comprises one or more energy sources, at least one supercapacitor, at least one rechargeable battery, and a controller. The charging of the energy storage devices and the delivery of power to the load is preferably dynamically varied to maximize efficiency. A low power consumption charge pump circuit is preferably employed to collect power from low power energy sources while also enabling the delivery of higher voltage power to the load. The charging voltage is preferably programmable, enabling one device to be used for a wide range of specific applications. Also low power charge pump driver circuits for efficient scavenging of low voltage, high current energy sources.

Desirable electrolyte compositions are described that are suitable for high voltage lithium ion batteries with a rated charge voltage at least about 4.45 volts. The electrolyte compositions can comprise ethylene carbonate and solvent composition selected from the group consisting of dimethyl carbonate, methyl ethyl carbonate, γ-butyrolactone, γ-valerolactone or a combination thereof. The electrolyte can further comprise a stabilization additive. The electrolytes can be effectively used with lithium rich positive electrode active materials.

The invention discloses a mobile terminal, a direct charging power adapter and a charging method. The method comprises the steps: the mobile terminal detects the short circuit condition of two communication pins in the USB interface of the mobile terminal, when the mobile terminal is inserted by an external equipment which is the power adapter, the mobile terminal can automatically identify the type of the external connected charging equipment by adopting the power adapter communication; at the same time, a special express charge mode is designed for the direct charging power adapter, when a battery of the mobile terminal is concentratedly charged, the battery is directly charged with heavy current by using the charging voltage outputted by the direct charging power adapter, and the volt value of the charging voltage can be dynamically adjusted according to the variation of the voltage of the battery. According to the above, on the premise that the safety of the battery charge is guaranteed, the great increase of the battery charging speed is realized, the required time of single charging of the mobile terminal is shortened, the influences on daily use of user caused by the repeatedly and long time charging of the mobile terminal is reduced, and the user satisfaction is greatly improved.

The invention discloses an adapter. A mobile terminal is charged through a data line, and a source end connector is used for receiving required charging voltage and required charging current from the mobile terminal. A control unit is used for obtaining the charging voltage and the charging current. The control unit is used for comparing the charging voltage and the charging current with the required charging voltage and the required charging current respectively, and a control signal is generated when the charging voltage and the charging current are different from the required charging voltage and the required charging current. A PWM (Pulse-Width Modulation) driving module is used for adjusting an output pulse signal according to the control signal so as to control the start frequency of a switch unit and change a third alternating current, and thus the charging voltage and the charging current are adjusted to the required charging voltage and the required charging current. In the charging process of the adapter, the adapter outputs voltage and current matched with the required charging voltage and the required charging current of the mobile terminal, and thus the charging effect of the mobile terminal is better.

A device and method for harvesting, generating, storing, and delivering energy to a load, particularly for remote or inaccessible applications. The device preferably comprises one or more energy sources, at least one supercapacitor, at least one rechargeable battery, and a controller. The charging of the energy storage devices and the delivery of power to the load is preferably dynamically varied to maximize efficiency. A low power consumption charge pump circuit is preferably employed to collect power from low power energy sources while also enabling the delivery of higher voltage power to the load. The charging voltage is preferably programmable, enabling one device to be used for a wide range of specific applications.

A system for actively controlling the charging profile of a battery uses a software-based alternator control unit to control the charging voltage. The system optimizes battery and alternator life. The system, on a dynamic basis, uses battery open-circuit voltage (OCV) to estimate battery state-of-charge (SOC). Also, the charging current of the battery is periodically estimated; this, after processing, provides an estimated SOC of the battery.

The present invention provides a charging mode control circuit and method. By utilizing such charging mode control circuit and method, a secondary battery fixed in a portable device can be quickly charged when the portable device communicate with an external computer. The method includes the steps of:a) providing a commutator, the commutator comprising an AC/DC adapter, a first interface, and a second interface, wherein the first interface is connected to the external computer and the second interface is connected to the portable device; b) comparing a charging voltage with a reference voltage, thereby producing a high voltage level signal according to a comparison result, wherein the charging voltage come from the AC/DC adapter; and c) selecting a fast-charging mode on the secondary battery according to the high voltage level signal.

The method and system for managing power supplied from a charging circuit to a power source in an implantable medical device comprises the steps of and circuitry for: measuring the current drain of the medical device; measuring the elapsed time since the last full charge of a power source of the device; calculating the actual capacity of the power source (corrected for fade) based on the variable of current drain and the variable of elapsed time; calculating the operating time based on the variable of current drain and the variable of the actual capacity of the power source; measuring the voltage of the power source; signaling the medical device when the power source voltage has reached a certain low value which requires disconnection from the power source; disconnecting, during discharging, the power source from the medical device upon the power source reaching a certain low voltage in order to prevent deep discharging of the power source and subsequent damage; precisely limiting the charging voltage to the power source in order to prevent overcharging beyond safe limits; disconnecting, during charging, the power source from the charging circuit upon the power source reaching a certain high voltage in order to prevent overcharging of the power source and subsequent damage; sensing when the electromagnetic waves being transmitted by an RF transmitter/charger induce a voltage level above a certain value at an RF receiver of the implanted power management system; reconnecting power supply inputs of the medical device to the power source upon sensing this induced high voltage level; monitoring the temperature of the power source during charging and discharging; disconnecting the charging circuitry from the power source if the temperature of the power source raises above a certain level during charging; reconnecting the charging circuitry to the power source when the temperature of the power source drops below a certain low value during charging; disconnecting the implanted medical device from the power source if the temperature of the power source raises above a certain level during discharging; and, reconnecting the medical device to the power source when the temperature of the power source drops below a certain low value during discharging.

The invention discloses a fast-charging method, a mobile terminal and a power adapter capable of being charged directly. The fast-charging method is provided based on the power adapter of which output voltage dynamic is adjustable. The voltage of the battery-core of a battery is divided into multiple sections, then a sectional-type constant-current charging way is adopted, the value of the charging voltage output through the power adapter is adjusted dynamically according to the located sections of the battery-core voltage of the battery inside the mobile terminal in the charging process, and the battery is charged directly through the charging voltage output through the power adapter, so that the charging current is improved greatly, thereby the charging speed of the battery is accelerated, the single-time charging time needed by the movable terminal is shortened, the influence of the situation that the mobile terminal needs to be charged frequently for a long time on daily use of a user is lowered, and the customer-using satisfaction degree in promoted to a large extent.