79results about How to "Reduce charging efficiency" patented technology

Disclosed is an electronic apparatus (1) comprising a power receiving device (2) and an electronic apparatus main body (3). The power receiving device (2) comprises a power receiving coil (11) having a spiral coil, a rectifier (12) and a secondary battery (13). The electronic apparatus main body (3) comprises an electronic device (14) and a circuit board (15). A magnetic foil (16) is arranged in at least one position between the spiral coil (11) and the secondary battery (13), the rectifier (12), the electronic device (14) or the circuit board (15). The magnetic foil (16) has a value expressed as the product of the saturation flux density MS and the thickness t, namely Ms·t, of not less than 15.

There is provided a battery pack system with estimation accuracy of a remaining capacity of a secondary batter enhanced. A current accumulation coefficient correction section 109 calculates a correction amount α with respect to a current accumulation coefficient k in accordance with a battery electromotive force Veq from an electromotive force calculation section 105. A remaining capacity calculation section 112 estimates a remaining capacity SOC by current accumulation, based on the current accumulation coefficient k calculated from a correction amount α, and a charging efficiency η based on a currently estimated remaining capacity calculated by a charging efficiency calculation section 110.

This invention relates to a method for controlling charging of storage batteries with gas sensors, which tests oxygen content or gas pressure in the internal gas of the battery with a gas sensor or an outer pressure sensor then uses a differential coefficient method to compute the variety rate of the oxygen or gas pressure to decide its charge state to further determine a charging strategy, which is suitable for Ni-base watercourse batteries.

The invention provides a portable intelligent charger of an electric car. The portable intelligent charger comprises a rechargeable battery, a weak current controlling and protecting module which is connected with the rechargeable battery, and a power factor correcting module which is connected with the weak current controlling and protecting module, wherein a resonant inverter rectifying module is connected between the rechargeable battery and the power factor correcting module; and a power device driving module connected with the weak current controlling and protecting module is arranged on the resonant inverter rectifying module. The portable intelligent charger can be used for overcoming the defects that the charger of the existing electric car is low in charging efficiency, low in reliability, high in power grid pollution and the like. The portable intelligent charger is high in charging efficiency as well as safe and stable to use.

A contactless charging method according to the present invention is applied to a contactless charging system 1 which comprises a transmitting unit 10 having a primary coil 11 and a receiving unit 20 having a secondary coil 21 and which charges a battery 30 electrically connected to the secondary coil 21 by the electromagnetic induction generated between the primary coil 11 and the secondary coil 21 and which supplements the charging efficiency of the battery 30 by varying a charging frequency used in the electromagnetic induction in proportion to the charging efficiency of the battery 30 that varies according to the position of the secondary coil 21 relative to the primary coil 11. The contactless charging method comprises: a step of detecting a charging frequency when a charging operation is performed by enabling the primary coil 11 to get close to the secondary coil 21; and a step of outputting the charging efficiency of the battery 30 acquired from the detected charging frequency such that a user may know the charging efficiency.

The invention discloses a negative material of a zinc-nickel rechargeable battery which is a composite material containing Sn6O4(OH)4-surface-modified ZnO, metal Zn powder and nano-carbon fiber, the quality percentage is 85-95 percent and 4-13 percent for Sn6O4(OH)4-surface-modified ZnO and metal Zn powder respectively, and the rest is for nano-carbon fiber, wherein the quality percentage of Sn6O4(OH)4 in ZnO is 1-25 percent. PTFE, CMC and PVA are added in the present negative material as binder, stirred uniformly with deionized water and then coated in the current collector foam nickel, and by the processes of drying and pressing, a Zn cathode is fabricated. By using the material to fabricate zinc-nickel rechargeable batteries, the batteries have long service life, stable circulation performance, and can be applied to electric tools, transportation means, electric toys, household appliances, communication instruments and lighting equipment etc.

A magnetic connector apparatus that charges an electric vehicle through contactless magnetic coupling. The magnetic connector apparatus includes an external charger, an inlet, and a magnetic connector. The inlet is connected to a rechargeable battery of the vehicle. The magnetic connector is connected to a power source of the external charger and is transferred to the vehicle to be inserted into the inlet.

The present invention relates to a redox flow battery and a redox battery system, and more particularly, to an electrode constituting a redox flow battery, a method of fabricating the electrode, an apparatus and method for fabricating electrolyte for a redox flow battery, a device and method for measuring a selected ion concentration of electrolyte constituting a redox flow battery, and a stand-alone redox battery system. A stand-alone redox battery system according to the present invention includes a micro hydroelectric power generating device and a redox battery. The micro hydroelectric power generating device includes: a feathering paddle wheel that is rotated by water introduced through a conduit; and a direct current generator that generates direct current according to the rotation of the feathering paddle wheel. The redox battery includes: a stack-type electrode assembly having a stacked structure of unit electrodes; a first electrolyte tank and a second electrolyte tank, which store, respectively, active materials having different oxidation levels; and a first pump and a second pump, which are connected to the first electrolyte tank and the second electrolyte tank, respectively, to circulate the stored active materials through the stack-type electrode assembly, thereby performing charging and discharging operations.

A battery pack and its charging/discharging method enabling suppression of inactivation of a secondary battery by refreshing the secondary battery such as a nickel-hydrogen battery. A battery pack (101) comprises a cell group of interconnected secondary cells, i.e., unit cells, sensors for sensing temperature and voltage, display means for displaying the state of the cell group, a switch for controlling charging/discharging of the cell group, a calculation/control circuit (4) for allowing the display means to display the state of the cell group according to the signals from the sensors and generating a signal to operate the switch. The battery pack (101) further comprises a refresh request display means (13) for displaying a message to the effect that refresh charging/discharging is necessary. There is used a method in which when the voltage of the secondary battery reaches a discharge end voltage, refresh charging/discharging is automatically performed if the recovery voltage after a predetermined elapse of time is below a predetermined voltage. With this, even a secondary battery left for a long time and inactivated can be refresh charged/discharged.

The invention provides a wind-solar-diesel hybrid system control method. The wind-solar-diesel hybrid system control method includes the following steps: collecting data, comparing and analyzing the data, and adjusting working modes according to comparison results. The collected data include storage battery data, diesel oil power generation data and time data. The working modes include a wind driven generator working mode, a solar battery array working mode, a diesel generator working mode, a storage battery working mode and a load working mode. By means of the wind-solar-diesel hybrid system control method, intelligent control over a wind-solar-diesel hybrid system is achieved, unified management and coordination on wind power generation, solar power generation and diesel generator power generation are achieved, and stability and reliability of operation of the wind-solar-diesel hybrid system are integrally improved.

The present invention relates to positive electrode material for NiH cell and is especially zirconium adding nickel hydroxide material and its preparation process. The nickel hydroxide material with zirconium hydroxide content of 0.1-4 wt% is prepared through a coprecipitation process, in which zirconium salt is added into the nickel hydroxide producing material and made to react together with Ni, Zn, Co and other elements to form the product of nickel hydroxide with embedded zirconium hydroxide. The addition of Zr can raise the high temperature discharge performance and density of the positive electrode material.

The invention relates to a balanced bidirectional charging method of a super capacitor. The method comprises the following steps of: in a control unit, filtering out the harmonic voltage of the fully charged voltage of the super capacitor when being fully charged voltage through a low pass filter to obtain filtering voltage, and setting the filtering voltage as the threshold voltage of a transistor; starting a high-frequency charger to charge the super capacitor, controlling the control unit to control a chargeable battery and the bypass circuit to be in a disconnection state, controlling a variable voltage regulator and a charging circuit to be in a disconnection state, and monitoring the bypass current of the bypass circuit in real time by a detector; with the charging operation, when the voltage of the super capacitor is boosted to the threshold value which is achieved by filtering the fully charged voltage through the low pass filter, conducting the transistor and enabling the current to pass through the bypass circuit. The method n balances the charging of the super capacitor on the primise of saving electric energy.

A charging method for a lead-acid battery allows the lead-acid battery to finish charging within an hour, and keeps the temperature of the lead-acid battery below 40 C. The charging method comprises three important parts, which are charging period, rest period, and discharging period. The three parts cooperate together to achieve an objective that allows the lead-acid battery to finish charging within an hour, and keeps the temperature of the lead-acid battery below 40° C., otherwise the service life of the lead-acid battery will be shortened, and the lead-acid battery will even be destroyed.

The invention provides a secondary battery protection device, a protection circuit and a control method thereof, and a battery pack. The purpose of the present invention is to suppress a decrease in the charging efficiency of a low-voltage secondary battery. The secondary battery protection circuit protects a secondary battery by using a charge control NMOS transistor and a discharge control NMOStransistor that are inserted in series in a current path between a positive electrode of the secondary battery and a load and a high-potential-side power supply terminal of a charger. The secondary battery protection circuit includes: a low voltage detection circuit that detects a voltage of the secondary battery that is lower than a low voltage detection voltage set lower than an overdischarge detection voltage; and a switching circuit that fixes the gate of the charge control NMOS transistor at the potential of the high-potential-side power supply terminal when the low-voltage detection circuit detects a voltage of the secondary battery that is lower than a low-voltage detection voltage.

The invention relates to the field of high-power microwaves, and provides an ultra-narrow pulse generation device combined feeding device and an ultra-narrow pulse generation device combined feeding method for solving the problem existing in the prior art. The ultra-narrow pulse generation device combined feeding device and the ultra-narrow pulse generation device combined feeding method improve the energy conversion efficiency and high-repetition-frequency output power of an ultra-narrow pulse source based on an avalanche transistor, and provide a better solution for arrayed application. According to the ultra-narrow pulse generation device, the time that a power supply end high-level signal is ahead of an ultra-wideband narrow pulse voltage signal is greater than the complete resonant charging time of an arbitrary stage RC charging loop; an ultra-wideband narrow pulse voltage Vf is input to one end of a first stage energy storage capacitor which is away from a second stage energy storage capacitor, a first stage avalanche transistor circuit discharges, and an output voltage value of an output end of a first stage avalanche discharge loop is Vf+V without considering circuit loss; and an output voltage value of an output end of an i stage avalanche discharge loop is Vf+i*V.

The invention belongs to the technical field of charging devices, in particular to a wireless charging device for an electric vehicle. The wireless charging device comprises a bottom plate, a reinforcing plate, a first motor, lead screws, a side plate, a fixing plate, a sliding plate, electric push rods, an insulating plate, an output coil, a distance sensor, a toothed plate, a gear, a second motor, limit plates, a pressure plate, a first spring, a switch, a third motor, a drawstring, baffle plates, a second spring, a connecting plate and guide wheels. The wireless charging device for an electric vehicle facilitates adjusting of the position of the output coil through rotation of the lead screws and rotation of the gear, thus solving reduction of the charging efficiency, caused by the deviation during parking of the vehicle; the vertical movement of the output coil facilitates the output coil to approach the receiving coil on the vehicle, thus being beneficial to the improvement of theinduced current and improvement of the charging efficiency of the vehicle; and the movement of the output coil is facilitated by the movement of the baffle plate, and the inner portion of the groundcan be sealed when not in use, thereby effectively preventing the entry of dust and improving the service life of the output coil.

The invention provides a wireless charger, a wireless charging system and a wireless charging method. The wireless charger comprises a housing, a circuit board, a soft magnetic plate and a transmitting coil; the circuit board, the soft magnetic plate and the transmitting coil are disposed in the housing; two opposite sides of the housing are respectively provided with a through hole; the wireless charger further comprises a temperature detection module, a controller and an air flow guiding module which are disposed in the housing; the temperature detection module detects temperature in the housing, and sends the detected temperature to the controller; the controller controls the air flow guiding module to be opened according to the temperature sent by the temperature detection module, and controls charging power of the wireless charger; and, when the air flow guiding module is opened, an air flow is guided to enter via the through hole in one side of the housing, bypass the circuit board, the soft magnetic plate and the transmitting coil and be discharged via the through hole in the other side. According to the wireless charger provided by the invention, in the charging process, the air flow guiding module enables the air flow to be formed in the wireless charger, and cooling for the inside of the wireless charger is achieved.

A charging station, a charging system and a charging method for a drone are provided. The charging station adapted to park a drone for charging includes a parking ramp, a pair of charging plates, a pair of protecting covers, and at least one actuating device. The parking ramp has a parking surface and a bottom surface. The drone is parked on the parking surface having at least two openings. The charging plates are fixed to the bottom surface. The protecting covers are disposed between the bottom surface of the parking ramp and the charging plates. The protecting covers cover the charging plates at the openings. The actuating device is fixed to the bottom surface and connected to the protecting covers. When the drone stands still on the parking surface, the actuating device drives the protective covers to move relative to the charging plates to expose the charging plates.

A quick charging method for an electric automobile storage battery includes the steps that the initial to-be-charged amount and the maximum acceptable start charging current I1 are obtained through an electric automobile electricity storage management unit controller; the maximum acceptable charging current I2 is obtained according to a restraint condition; according to a maximum acceptable charging current exponential decay curve, I1 serves as the start current to charge the electric automobile storage battery; when the current decays to I2, charging and discharging and charging stopping are conducted, the charging current is increased to I1 from I2, and the electric automobile storage battery is charged according to a new maximum acceptable charging current exponential decay curve; and in this way, the electric automobile storage battery is charged through constant current I3 till the electric quantity charged at a single time is smaller than twice of the electric quantity discharged at a single time, and charging is stopped till the battery is fully charged. By the adoption of the method, the electric automobile storage battery is charged mainly according to the maximum acceptable charging current exponential decay curve, the acceptable charging current capacity of the battery is improved in the charging process, it is guaranteed that no gassing is generated in the charging process, and the charging time is greatly shortened.

The invention discloses an intelligent charging pile with information collecting, detecting and feeding back functions for an electric automobile, and the intelligent charging pile comprises a pile body, a power supply module, a voltage processing module, a controller, a circuit compensation module and an information processing module, wherein the power supply module is used for being electricallyconnected with the electric automobile; the voltage processing module is connected with the power supply module, the controller is electrically connected with the voltage processing module and is incommunication connection with the information processing module, and the controller receives and transmits the electric signal value of the voltage processing module to the information processing module; the circuit compensation module is electrically connected with the power supply module and the controller respectively, and adjusts the output voltage of the power supply module; and the information processing module is connected with the controller, and the information processing module monitors the voltage of the charging pile and adjusts the circuit compensation module. The above-mentionedcharging pile has voltage detection and feedback regulation function concurrently, operating personnel can respond to the fault of the charging pile in time, the charging pile has low use cost, the charging pile with fault is output at a higher voltage, and the charging pile has high charging efficiency.

An ECU includes: an electronically controlled valve opening degree control unit for increasing the opening degree of an electronically controlled valve, as a temperature of a coolant detected by a water temperature detecting unit is higher; and a gear ratio control unit for changing the gear ratio of an automatic transmission to a gear ratio to be used when a vehicle runs at a slow speed, when the temperature of the coolant detected by the water temperature detecting unit is equal to or higher than a temperature when the electronically controlled valve opening degree control unit sets the opening degree of the electronically controlled valve to be a maximum opening degree, and when an engine speed detected by an engine speed detecting unit is slower than a preset engine speed and a load to an engine detected by a load detecting unit is larger than a preset load.

The invention relates to an AC and DC charging method for an electric mobile charging vehicle. According to the method, when supplementing energy in a trough electricity period, by calculating and controlling the charging power, the total trough electricity duration is fully used to the greatest extent. Specifically, when supplementing energy for a power battery of the electric mobile charging vehicle by continuously adopting a DC charging mode within the range of the trough electricity duration, the DC charging power is reasonably controlled to ensure that the power battery is fully charged after the trough electricity period ends; and when supplementing energy for an energy storage battery of the electric mobile charging vehicle by continuously adopting an AC charging mode within the range of the trough electricity duration, the AC charging power is reasonably controlled to ensure that the energy storage battery is fully charged after the trough electricity period ends. By adopting the charging method disclosed by the invention, the damages caused by long-time high-current charging to the battery can be reduced, the charging cost can be reduced, the characteristics of low electricity price and long time in the nighttime trough period can be fully utilized, the service life of the battery can be prolonged, and the economic performance of the electric mobile charging vehicle can be improved.

The invention provides an electric bicycle wireless charging system and relates to electric bicycles. The system comprises an emission end and a receiving end. The emission end is provided with an emission coil, a full-bridge high-frequency inverter circuit, an AC-DC switch power source, an emission end auxiliary power source, a primary side control circuit, a driving circuit, a primary side wireless communication module and a voltage regulating circuit. The emission coil is connected with a power supply network through the full-bridge high-frequency inverter circuit and the AC-DC switch power source. The receiving end is provided with a receiving coil, a rectifier filter circuit, a vehicle-mounted battery, a detection circuit, a receiving end auxiliary power source, a secondary side control circuit, a user interaction interface and auxiliary side wireless communication module, and the receiving coil is connected with the vehicle-mounted battery through the rectifier filter circuit. The receiving end auxiliary power source supplies power to the primary side control circuit and the secondary side control circuit. The input end of the voltage regulating circuit is connected with the output end of the primary side control circuit, and the output end of the voltage regulating circuit is connected with the AC-DC switch power source.