257results about How to "Reduce charging current" patented technology

The invention discloses an Li traction battery series parallel change-over charging method and a charging device. The charging device comprises a power main loop comprising a rectifier circuit, a DC filtering capacitor, a pre-charging circuit, a voltage sensor, a switch bridge circuit, a charging current sensor and a series parallel change-over switch, a control circuit board comprising a parallel branch signal unit, a switch signal drive control unit, a coil signal circuit, a voltage current signal circuit, a control processor and a signal display unit, a serial charging circuit comprising a filter inductor, a filter capacitor and an output voltage sensor, and a parallel charging circuit comprising a primary coil, a feedback coil, an iron core, a plurality of secondary coils of a multi-winding transformer and a plurality of series parallel charging unit. The pre-charging, serial charging and parallel charging are carried out by the charging method according to a set pre-charging voltage value and an end voltage value. The method and the device provided by the invention reduce the cost and volume of charging devices, maintain the balance of charging capacity of every Li traction battery electrical core, ensure adequate protection and best working status for each battery unit and improve safety and service life cycle of Li traction battery.

The invention provides a boost type battery charging management system and a control method thereof. The system comprises a boost converting circuit and a charging control circuit, wherein the boost converting circuit receives direct current input voltage, boots the direct current input voltage to obtain an output signal in a converting mode, and the output signal charges a battery. The charging control circuit is connected with an output end of the boost converting circuit, when voltage of the battery is smaller than first threshold voltage, the charging control circuit adjusts the output signal to maintain charging current of the battery is trickle current, and when the voltage of the battery is larger than the first threshold voltage, the output signal directly charges the battery, and the first threshold voltage is larger than the direct current input voltage.

A USB battery includes a transistor that controls the flow of current between a USB host and a battery. The transistor is controlled a function of: 1) the amount of current flowing to the battery, and 2) the voltage on the USB VBUS circuit. The transistor dynamically regulates the amount of trickle current to approach a predetermined maximum as closely as practical while maintaining the voltage on the VBUS circuit above a predetermined minimum.

A battery cell charging system, including a charger and a controller, for low-temperature (below about zero degrees Celsius) charging a lithium ion battery cell, the battery cell charging system includes: a circuit for charging the battery cell using an adjustable voltage charging-profile to apply a charging voltage and a charging current to the battery cell wherein the adjustable voltage charging-profile having: a non-low-temperature charging stage for charging the battery cell using a charging profile adapted for battery cell temperatures above about zero degrees Celsius; and a low-temperature charging stage with a variable low-temperature stage charging current that decreases responsive to a battery cell temperature falling below zero degrees Celsius.

A charge equalizer for a string of series-connected batteries includes a shunt path for each of the batteries. The equalizer measures the voltage of each of the batteries of the string and then closes a switch in the shunt path associated with the highest voltage battery for a predetermined time. Then the switches of all of the shunt paths are opened and the cycle repeats. In this way, charging is equalized in the batteries of the string, regardless of whether or not any of the batteries of the string is in an over charged condition.

A disclosed battery charger comprises multiple interfaces provided corresponding to multiple mobile devices, the interfaces being connected to the mobile devices in wired or wireless connection; a charge parameter setting unit setting one or more charge parameters for the mobile devices; a switching control unit switching timing of charging the multiple mobile devices based on the charge parameters set by the charge parameter setting unit; and a charging unit charging one of the mobile devices selected by the switching control unit.

The invention discloses a rapid container formation charging method for a lead-acid storage battery. The charging method is implemented through 27 charging and discharging stages, including eight times of discharging, one time of standing and one time of capacity checking and matching, wherein a maximum charging current is 0.15C<3> to 0.20C<3>, and a minimum charging current is 0.01C<3> to 0.05C<3>. The lead-acid storage battery is charged and discharged repeatedly, and a quantity of electricity charged each time is larger than a quantity of electricity discharged subsequently. Through adoption of the method, concentration polarization phenomena can be reduced greatly, and damages to crystal structures of active substances on a pole plate are reduced, thereby prolonging the service lifecycle of the lead-acid storage battery. As indicated by a detection performed according to specifications in GB / T18332.1-2009, the service lifecycle of the lead-acid storage battery adopting the method is greater than 450 times, and an initial capacity of the lead-acid storage battery is not less than 100 percent (counted by a rated capacity)

The invention provides a charge control method of a rechargeable battery and a portable computer. The charge control method comprises the following steps: acquiring charge current control parameters of the rechargeable battery; modifying a first charge current of the charge current of the rechargeable battery into a second charge current, wherein the second charge current is less than the first charge current; and using the second charge current to charge the rechargeable battery. The charge control method is used to change the existing mode that the battery is charged by the maximal current, thus improving the service life of the rechargeable battery.

When charging of a secondary battery is started, a power source section for supplying an electric current for charging the secondary battery gradually increases the supply amount of the current. If the charging current has reached a predetermined first threshold current, the power source section is operative to set the supply amount of the current to a predetermined constant current for a constant current charging. If a terminal voltage of the secondary battery has reached a predetermined threshold voltage, the power source section is operative to supply a predetermined voltage for a constant voltage charging to the secondary battery.

The invention relates to a high-voltage charging system, a high-voltage charging battery and a terminal device. The high-voltage charging system comprises the high-voltage charging battery, a controller, a high-voltage charging module and a buck converter, wherein the high-voltage charging battery comprises a plurality of battery cells connected in series; the controller is used for regulating an output voltage of the high-voltage charging module according to a voltage of the high-voltage charging battery; the high-voltage charging module is used for outputting a charging current of a predetermined magnitude to the high-voltage charging battery for charging the high-voltage charging battery; and the buck converter is used for converting the output voltage of the high-voltage charging module or the high-voltage charging battery into a device power supply. According to the technical scheme, a charging voltage can be increased and a charging current can be reduced, so that the energy loss on a charging path is reduced and the heat value is reduced.

The invention discloses a system and a method for reducing a heating value in mobile terminal charging. The method includes the steps that A, a clock management module sends temperature detection signals every other cycle, and a central processing unit (CPU) carries out temperature detection according to the temperature detection signals; B, an obtained temperature value is compared with an over-temperature threshold value of a battery and a power management chip in a memorizer by the CPU, and if the temperature value exceeds the over-temperature threshold value, charging currents are reduced; and C, the CPU detects the temperature of the battery and the power management chip after a cycle interval through a microprocessor, and if the temperature exceeds the over-temperature threshold value, the power management chip is controlled through the microprocessor to close a charging function. According to the system and the method, the heating value of a mobile phone in the charging process can be reduced, if the heating value of the mobile phone reaches the threshold value, the current value of constant current charging is halved, and if the temperature is not reduced below a prewarning value yet, the charging function is closed. Until the temperature of the mobile phone returns to be in a normal temperature, the charging function is opened again. According to the system and the method, not only is the temperature of the mobile phone in the charging process is reduced, but also safety of the mobile phone in the charging process is further improved.

The invention discloses a charge method of a lithium ion power storage battery, relating to the field of charge technology of lithium ion power storage batteries. The charge environmental conditions are as follow: one standard atmospheric pressure, temperature 25 plus or minus 5 DEG C and humidity is less than or equal to 85% RH, and different constant currents are adopted to charge the battery under different voltage limiting stages. Through the charge method, the battery can not be overcharged and can be charged fully, thus having equilibration function. Meanwhile, the voltage range of the current equilibration process is reduced, thus unnecessary circulation loss of a single battery cell can be avoided as much as possible, the problem of charge unbalancedness of a battery pack can be solved and the working performance can be improved.

The invention provides an auxiliary starting device of a vehicle engine, belonging to the technical field of an engine and solving the problems of the prior art that the electric quantity of a storage battery is reduced so that the engine cannot be normally started. The device is connected with the storage battery; the device comprises a starter, a starting relay, a super capacitor, a converting circuit and a DC / DC (Direct Current / Direct Current) converter, wherein an input end of the DC / DC converter is connected with an anode of the storage battery; when the starting relay is switched off, a charging circuit is formed by the super capacitor, the DC / DC converter and a cathode of the storage battery; meanwhile, a preliminary initial starting circuit is formed by connecting the anode of the storage battery with the starting relay and the starter through the converting circuit; the charging circuit and the preliminary initial starting circuit are switched off by the converting circuit when the starting relay is switched on; an anode of the super capacitor is connected with the starting relay through the converting circuit; and a cathode of the super capacitor is connected with the anode of the storage battery through the converting circuit to form a boosting starting circuit. According to the device disclosed by the invention, the starting performance of the engine can be stabilized and improved when voltage of the storage battery is reduced.

The invention provides a PWM / PFM control circuit comprising a feedback circuit, an error amplifier, a PWM comparator, an oscillator, and an oscillator frequency control circuit. The feedback circuit samples an output voltage of a power conversion circuit, and generates a feedback voltage reflecting the output voltage. The error amplifier obtains an error amplification voltage based on the error between a reference voltage and the feedback voltage. The oscillator generates a triangular wave oscillation signal. The PWM comparator is used for comparing the triangular wave oscillation signal and the error amplification voltage to output a control signal. The oscillator frequency control circuit outputs a corresponding current signal to the oscillator based on the error amplification voltage. The oscillator adjusts the magnitude of the charging current of the oscillator based on the current signal in order to change the frequency of the triangular wave oscillation signal output by the oscillator. Compared with the prior art, the PWM / PFM control circuit of the invention not only can realize continuous switching transition from PFM to PWM, but also can further reduce the minimum value of frequency under a PFM mode.

The invention provides a mobile terminal which comprises a detecting module, a comparison module, a processing module and a charging adjustment module. The detecting module is used for detecting the temperature of a battery of the mobile terminal, the comparison module is used for receiving the temperature, transmitted by the detecting module, of the battery and comparing the temperature of the battery with the preset temperature to obtain the relation, the processing module is used for determining charging adjustment parameters of the battery according to comparison results of the temperature of the battery with the preset temperature, and the charging adjustment module is used for adjusting a charging current of the battery according to the charging adjustment parameters. The invention further provides a charging control method of the mobile terminal. By means of the mobile terminal and the charging control method of the mobile terminal, the charging current can be reduced, the temperature of the surface of the battery can be accordingly lowered, the safety of the battery is improved, the battery can be efficiently protected, and the service life of the battery can be further prolonged.

The invention provides a terminal equipment charge control method and device and terminal equipment. The terminal equipment charge control method comprises the following steps: when the terminal equipment is in a charging process, detecting the using state of the terminal equipment; if the terminal equipment is in an application state, determining the processor load of the terminal equipment and the temperature of the terminal equipment; and according to the processor load of the terminal equipment and the temperature of the terminal equipment, reducing the charge current of the terminal equipment so that the processor performance of the terminal equipment meets the requirement of the processor load and the temperature of the terminal equipment is lower than a preset threshold value. According to the terminal equipment charge control method and device and the terminal equipment provided by the invention, the working performance of the terminal equipment in a charging state cannot be influenced, and the user experience is improved.

The invention relates to a preparation method of gold nanometer array electrode, which the substrate is polycarbonate filter membrane, after the processes of the pretreatment of chemical plating to the polycarbonate filter membrane, chemical plating, chemical plating after acid leaching, such as cleaning and processing, the former treatment, post acid leaching and rinsing, and assisted by the ultrasonic wave process in the steps of pretreatment, acid leaching and rinsing, using degreasing cotton soaked with dilute sodium cyanide to softly wipe the surface of the filter membrane after chemical plating, then rinsing with methanol, using the combined method of mechanical effect and chemical effect to effectively remove a gold layer on the surface to form the gold nanometer array, then pasting the filter membrane to the collector, assembling into the gold nanometer array electrode. The diameter of a single gold nanometer disk in the array is 10 to 100 nanometers measured by scanning electronic microscope, the component of the array group is pure gold measured with energy dispersive X-ray spectrum. The electrode has the advantages of high mass transfer speed, low double-layer charge current, effectively improving signal-to-noise ratio and the detection limit. The preparation method of gold nanometer array electrode has the advantages of ingenious design, simple operation and good reproduction.

The invention relates to a controlling device and a controlling method for charging operation of a battery, that is to say, it is a device and method to optimize charging stations of the batteryby adjusting charging capacity of the battery. The method includes reading an actual full charge capacity of the battery and a design capacity of the battery. The actual full charge capacity of the battery is compared with the design capacity of the battery. A charge voltage and a charge current are adjusted if the actual full charge capacity is less than the design capacity. The charge voltage and the charge current in adjusting step is used for controlling the charging operation of the battery. This invention determines the charging station, if the nonce full charge capacity is less than the design capacity, the charging operation of the battery is controlled by the adjusted charge voltage and charge current which are adjusted by decreasing charge current and increasing charge voltage. This invention can properly adjusts the full charge capacity of the battery and increases the charging efficiency.

The invention relates to a charging protection system and method for an electric passenger car. The system comprises a power battery, a battery management system and a charging socket; an off-board charger charges the power batter through the charging socket under the control of the battery management system, and a temperature and humidity sensor is arranged beside a positive and negative electrode binding post of the charging socket; the temperature and humidity sensor detects the temperature K and the humidity psi around the positive and negative electrode binding post and sends the temperature K and the humidity psi to the battery management system, the battery management system compares the temperature K and the humidity psi with a set temperature value K1 and a set humidity value psi1, and if K is larger than K1 or psi is larger than psi1, the charging current to the power battery is reduced; if K is larger than K2 or psi is larger than psi2, charging of the power battery is stopped.

The present disclosure discloses a charging control method and device and an charging system for an electric vehicle. A method applied to a gun-shaped charging coupler comprises: detecting a press state of a latch button of the gun-shaped charging coupler; and sending a control signal to a charging pile connected with the gun-shaped charging coupler according to a detection result, the control signal being used for allowing the charging pile to obtain a charging control strategy, and controlling the charging pile to execute an operation corresponding to the charging control strategy. In such a way, when an electric vehicle is charged, the safety in the charging process can be improved with prolonging of the service lives of the gun-shaped charging coupler and a charging outlet and protection on the safety of people.

The invention discloses a mobile terminal charging control method, which comprises the following steps: when a mobile terminal is charged, obtaining a current temperature value of the mobile terminal in real time; when the temperature value is greater than a first preset value, starting a preset temperature protection mode; and judging whether a current power value of the mobile terminal is greater than a first power threshold or not under the temperature protection mode; if so, reducing a charging current; and if not, reducing the rate of data business. The invention further discloses a mobile terminal charging control device. The mobile terminal charging control method and device improve the using safety of a mobile phone.

The invention provides storage equipment and a standby battery charging method and control device therefor. The method comprises the steps: judging whether the cell temperature sampling value of a standby battery is greater than a preset threshold value or not when the standby battery is in a charging state; controlling a cooling fan of the standby battery to increase the rotating speed when the cell temperature sampling value of the standby battery is greater than the preset threshold value, so as to reduce the environment temperature of the standby battery, thereby enabling the standby battery to dissipate heat in a better way, and reducing the cell temperature. Meanwhile, through judging whether the time when the cell temperature sampling value is greater than the preset threshold value is greater than a preset time duration or not, the method obtains a control effect of reducing the cell temperature through reducing the environment temperature. If the time when the cell temperature sampling value is greater than the preset threshold value is greater than the preset time duration, it indicates that the heat dissipation capability of the external environment cannot effectively achieve the control of the cell temperature, and the charging current of the standby battery is controlled to be reduced at this moment, so as to reduce the cell temperature, and prevent the overheating of a cell from affecting the service life of the standby battery.

The invention belongs to the technical field of drive control over hybrid power vehicles, and particularly relates to a hybrid power source for hybrid power. According to the technical scheme, when a vehicle accelerates urgently, the high instantaneous power is provided according to the advantage that the specific power of a supercapacitor is high, the response characteristic of the hybrid power source can be improved, the magnitude of discharging currents of a battery can be reduced, and damage to the battery is reduced; when the deceleration of the vehicle is high, and the high braking power is needed, most of braking energy is absorbed through the supercapacitor, and the magnitude of charging currents for the battery is reduced; the recovery ratio of the braking energy can be increased, and the service life of the battery can be prolonged.

The invention relates to a battery charger, comprising an input rectifier filter circuit, a high frequency inverse-excited converter circuit, an output rectifier filter circuit, an auxiliary power circuit, and a temperature detection-control circuit. It is characterized in that a constant-current stable-voltage control circuit which is formed by a current voltage detect-feedback circuit, an photoelectric coupled circuit, and a impulse-width modulation control circuit in the cascade connection; The rectifier filter circuit transfers the incoming alternating current into direct current, and via the high frequency inverse-excited converter circuit, to separate and output direct voltage to charge the battery; the constant-current stable-voltage control circuit and the impulse-width modulation control chip are combined to control the constant-current charging and the stable-voltage protection; the temperature detection-control circuit is used for temperature protection of battery to avoid overcharge. Said invention has the advantages of high property, lower cost, safety and reliability, while it can be used to charging variable nickel-cadmium battery, nickel-hydrogen battery and lithium battery.

A charge equalizer for a string of series-connected batteries includes a shunt path for each of the batteries. The equalizer measures the voltage of each of the batteries of the string and then closes a switch in the shunt path associated with the highest voltage battery for a predetermined time. Then the switches of all of the shunt paths are opened and the cycle repeats. In this way, charging is equalized in the batteries of the string, regardless of whether or not any of the batteries of the string is in an over charged condition.

The invention provides a battery charger circuit and a method for battery charge. The battery charging circuit monitors a charging die temperature, or directly monitor IC temperature using a temperature sensor. A maximum temperature allowed for the charging die is predetermined. The charging circuit is capable of reducing charging current at the predetermined maximum temperature value. The charging die signal is compared by a reference signal to achieve the reduction of charging current at the maximum allowed temperature value. The battery charge circuit includes: a charge current loop for providing charge current to battery, therein, said charge current changes according with adjusted voltage; a control loop which can adjust said adjusted voltage according with charging die temperature adjustment; and when said charging die temperature exceeds to pre-set temperature threshold, said control loop can reduce said charging current by reducing said adjusted voltage. The battery charger circuit and method can realize high-efficiency charging and overheat protection with high-efficiency and low-cost.