30results about How to "Reduce charging speed" patented technology

The invention discloses a charge control device and method. The device comprises a first detection module and a first setting module, the first detection module detects current states of a terminal under charging, the current states include a non-operation charge state and an operation charge stage, the first setting module sets current charge current of a battery of the terminal to first current when the first detection module detects that the terminal under charging is in the non-operation charge state, and the first setting module sets current charge current of a battery of the terminal to second current when the first detection module detects that the terminal under charging is in the operation charge state, wherein the first current is greater than the second current. Through the scheme according to the embodiments of the invention, charge speed can be controlled according to a user application scene, the charge speed is decreased when a user is using the terminal, and less is heat is produced; charging can be accelerated when the user is not using the terminal, and charging efficiency and user experience are improved.

The invention discloses a charge-discharge equalization control circuit of a battery pack. The charge-discharge equalization control circuit comprises a charge-discharge circuit, a voltage detection circuit, a voltage comparator, a controller, a current-sharing circuit and a discharge switch. An input end of the charge-discharge circuit is connected with a power line, and an output end of the charge-discharge circuit is connected with at least two battery single bodies respectively. An input end of the voltage detection circuit is connected with at least two battery single bodies respectively. An input end of the voltage comparator is connected with an output end of the voltage detection circuit. An input end of the controller is connected with the voltage comparator, and an output end of the controller is connected with the charge-discharge circuit. The current-sharing circuit is connected with the charge-discharge circuit and the controller. The discharge switch is located in the charge-discharge circuit. The charge-discharge equalization control circuit can ensure charging equalization between the battery single bodies through a replacing mode and a current-sharing mode in the charging process, can control the high-voltage battery single bodies to charge the low-voltage battery single bodies, and further ensures the mutual equalization between the battery single bodies in the discharging process.

A drive unit includes a first transistor, a second transistor, a current source that is connected to a high-potential-side electrode of the first transistor, and delivers constant current, a current control circuit configured to perform control to start of charging of the gates of the first and second transistors using the current source, and a gate charge circuit that charges the gates of the first and second transistors, separately from the current source.

An AMOLED driving circuit, a driving method and a display device, wherein a control unit is connected to a data line and a control line, and is connected to a driving unit via first, second and third nodes; a charging unit is connected to the driving unit via the first node, and is connected to a first power source; the driving unit is connected to one end of a light emitting device, and is connected to the first power source; the other end of the light emitting device is connected to a second power source. The control unit controls a current so as to charge the charging unit through the driving unit, and controls the charging unit so as to supply a voltage to the driving unit through the first node, so that the driving unit is driven by the voltage and drives the light emitting device to emit light.

A method of charging electric vehicles includes charging a high-voltage battery unit with power supplied through two or more inlets. The method includes determining whether the charge amount of the high-voltage battery unit has reached a predetermined charge amount. The method includes charging the high-voltage battery unit with power supplied through one of the two or more inlets and controlling a first switching unit such that power supplied through the remaining inlets is provided to an application component when the charge amount of the high-voltage battery unit has reached the predetermined charge amount.

An arrangement for controlling the temperature of air being fed to a vehicle engine includes an engine compartment in which the engine is arranged. The engine compartment is provided with an ambient air intake allowing an airflow into the engine compartment. The engine is provided with an engine air intake arranged inside the engine compartment. The arrangement further includes an air fan for forcing the airflow via the ambient air intake into the inside of the engine compartment. The engine air intake is arranged in a position allowing at least a substantial part of the airflow to enter the engine air intake.

The invention discloses a method for charging a power battery under a low-temperature environment. The method comprises the following steps of charging the power battery with a first current; judging whether highest single voltage of the power battery reaches a first voltage or not; reducing a charging current to a second current and charging the power battery with the second current if the highest single voltage of the power battery reaches the first voltage; judging whether the highest single voltage of the power battery reaches a full-charge voltage or not; reducing the charging current to zero if the highest single voltage of the power battery reaches the full-charge voltage; and ending charging. The method has the beneficial effects that the charging current is gradually increased according to a real-time voltage of the power battery, the temperature of the power battery is gradually increased by the charging current, so that the ion activity of the power battery is slowly improved, and the more energy can be stored in the power battery.

The invention discloses a sensitive amplifier circuit, which comprises nine PMOS transistors, seven NMOS transistors, two capacitors, two inverters, an operational amplifier, a voltage-controlled current source and a memory cell. The first capacitor and the second capacitor control compensation currents of the first PMOS transistor and the second PMOS transistor. A memory cell current and a firstvoltage control current source current influence a compensation current through a first capacitor and a second capacitor, thereby realize that function of dynamically changing the compensation current. The invention can greatly increase the speed of the comparison current and realize the high-speed sensitive amplifier circuit.

The invention discloses a self-neutralization device of an ionic liquid thruster, which is realized through control of a feedback circuit, and the feedback circuit is composed of a high-voltage isolation circuit, a sampling circuit, a control circuit, an electricity storage capacitor, an isolation resistor and the like. Accumulated charges are limited to a thruster and a high-voltage output end through the high-voltage isolation circuit, the charges are captured through the electricity storage capacitor and converted into voltage signals at the two ends of the capacitor, and the sampling circuit measures capacitor voltage through a voltage dividing method and transmits the capacitor voltage to the control circuit. The high-voltage isolation circuit changes the voltage value or the duty ratio of an output signal under the adjustment of the control circuit, so that the emission proportion of positive and negative ions of the thruster beam is changed, and the originally accumulated charge quantity is balanced. According to the device, the positive and negative ion emission proportion of the ionic liquid thruster can be autonomously balanced, self-neutralization work of the thruster can be maintained, the problem that a spacecraft is electrified due to charge accumulation is prevented, ionic liquid electrochemical reaction caused by charge imbalance is avoided, and the service life of the ionic liquid thruster is remarkably prolonged.

The invention provides a battery pack equalizing charging and discharging device in the technical field of charge and discharge. The battery pack equalizing charging and discharging device comprises acontrol module, a group charging and discharging module, an independent discharging module and a display alarm module, wherein a voltage division circuit in a peripheral circuit of the control moduledivides the voltage of each battery into the range acceptable by the control module; the control module receives the voltage value of each battery and controls the charging and discharging module tocharge and discharge the battery according to the received battery voltage; the independent discharging module is connected with all batteries, when the batteries are charged, the control module controls the independent discharging module to enable the batteries to enter a discharging state or not, and the control module sends real-time voltage to the display alarm module and controls the alarm action of the display alarm module. The efficiency of the battery pack is improved, and the service life of the battery pack is prolonged.