42results about How to "Stable charging current" patented technology

The invention relates to an electric car lithium battery active balancing system based on a battery management chip LTC6804. A single-chip microcomputer collects battery voltage through a battery management chip, a lithium battery active balancing scheme is determined, bilateral switches formed by connecting N-MOSFETs and P-MOSFETs in series are used in balancing circuits, bidirectional transferring of energy can be achieved, two sets of bilateral switches only need one control signal, and the system control difficulty is greatly reduced. Each battery needs to be connected with a charging allowing switch in series, wrong charging is prevented, and the safety and reliability of the system are improved. Switching between the single-single balancing circuit and the single-overall balancing circuit can be achieved by controlling two N-MOSFETs, the circuit structure is clear, and control is convenient. A double-layer balancing circuit is formed by the single-single balancing circuit and the single-overall balancing circuit, and the optimal balancing effect is achieved through a power lithium battery pack. The circuit structure is simple, cost is low, the balancing speed is high, the circuits have hierarchy, modularization is easy, stacking of the balancing circuits is promoted, and the system can be widely applied to electric cars.

The invention discloses a mobile phone charger based on thermoelectric power generation. The mobile phone charger comprises a thermoelectric power generation module, a boosting module, a driving module, an isolation rectifying circuit and an isolation sampling module, wherein the thermoelectric power generation module utilizes a plurality of serially connected or parallelly connected thermoelectric power generation sheets to generate one low voltage under the condition of a certain temperature difference; the boosting module is connected with the output end of the thermoelectric power generation module to enable the low voltage to be boosted to a high voltage; the driving module is connected with the output end of the boosting module so as to enable the high voltage output by the boosting module to be converted into stable alternating current to be output; the isolation rectifying circuit is connected with the output end of the driving module so as to perform isolation rectification on alternating current output of the driving module to generate stable output to be output through an output interface; the isolation sampling module feeds the output back to the driving module to perform dynamic regulation so as to stabilize the voltage after sampling isolation is performed on the output of the isolation rectifying circuit. The mobile phone charger based on the thermoelectric power generation utilizes the thermoelectric power generation principle, adopts reasonable heat-conduction and heat-dissipation devices and boosting and voltage-stabilizing circuits, achieves the purpose of mobile phone charging, and is particularly suitable for outdoors and field emergent service.

The invention discloses a switch array and a display array of a display device. The display array of the display device comprises a switch array and a pixel array, wherein the switch array comprises M*N MEMS (micro-electromechanical systems) switches, M is a line number, and N is a row number; the MEMS switches in each line are respectively controlled by corresponding line driving signals, and each MEMS switch respectively outputs a corresponding row data signal under the control of a corresponding line driving signal; and the pixel array comprises M*N pixel units which are respectively and correspondingly coupled with the M*N MEMS switches, and each pixel unit displays according to the row data signal output by the corresponding MEMS switch. The switch array and the display array of the display device can reduce layout area and realizes high integration.

The present invention discloses a starting circuit of a PWM chip of a super-wide voltage auxiliary power supply. The circuit comprises a voltage switching switch circuit, a voltage detection circuit and a charging circuit; the voltage switching switch circuit comprises a MOS tube Q1, a resistor R4 and a resistor R5; the voltage detection circuit comprises a MOS tube Q2, a resistor R7 and a resistor R8; and the charging circuit comprises a resistor R1 and a resistor R2. The starting circuit of the PWM chip of the super-wide voltage auxiliary power supply can provide stable charging current for the PWM chip VCC no matter how the input voltage is changed, the relative change amount is small; and when the power supply generates faults, the chip can restarted and cannot enter a locking state, after the faults are eliminated, the chip can be restarted with no need for power-off restarting, especially the circuit works in the ultrahigh voltage, the circuit loss is less than the loss of a routine circuit.

The invention relates to a charge variable current protector which comprises a control device which is independent of a power supply inside a car. The control device comprises a shell, a replaceable current input plug which is connected with an outside power grid power supply and a replaceable current output plug which is connected with a charging device are arranged on the shell, and a charge protective circuit is arranged in the shell. The charge variable current protector is simple in structure and has functions of stabilizing integrated power grid isolating voltage and converting large-power alternating current. Different measures can be taken for different faults, two redundant disconnecting protection systems which do not interfere with each other are arranged in a redundant disconnecting module when disastrous faults occur, and a first operation amplifier and a second operation amplifier can timely handle the disastrous faults. In addition, current input and output interfaces can be replaced at any time, various devices needing to be charged can be charged, and the charge variable current protector is widely applicable.

The invention discloses a 5V output mobile power supply. The conventional mobile power supply is limited in outdoor use, low in output power and lack of a perfect protection device, and a safety accident is easily caused. The 5V output mobile power supply comprises a lithium battery, a singlechip control circuit, a charging circuit, a short-circuit protection circuit, a temperature and over-discharge protection circuit, a 5V output circuit and an electric quantity display circuit, wherein the first output end of the charging circuit is electrically connected with the input end of the lithium battery, and the second output end of the charging circuit is electrically connected with the input end of the singlechip control circuit; the input end of the short-circuit protection circuit is electrically connected with the output end of the lithium battery, and the output end of the short-circuit protection circuit is in signal connection with the input end of the temperature and over-discharge protection circuit; the output end of the temperature and over-discharge protection circuit is in signal connection with the input end of the 5V output circuit; the output end of the singlechip control circuit is in signal connection with the input end of the electric quantity display circuit; the temperature and over-discharge protection circuit is in signal connection with the singlechip control circuit; and the lithium battery is electrically connected with the singlechip control circuit. The 5V output mobile power supply adopts a plurality of charging modes, and is safe and reliable.

The invention discloses a vegetable transporting vehicle with a freezing function. The vegetable transporting vehicle comprises a vehicle body. A vehicle beam is arranged on the lower portion of the vehicle body and matched with an axle frame. The axle frame is rotationally matched with an axle. Wheels are arranged at the two ends of the axle. A set of lower connecting plates are arranged on the upper portion of the vehicle body and connected with upper connecting plates through springs. The upper connecting plates are connected with a transporting box body. One end of the transporting box body is hinged to a back cover through a pin shaft. A solar cell panel is arranged on the upper portion of the outer side of the transporting box body. A set of semiconductor chilling plates and a storage battery are arranged on the upper portion of the inner side of the transporting box body. A control panel is arranged at one end of the interior of the transporting box body. The vegetable transporting vehicle with the freezing function has good damping function, can prevent the situation that vegetables are collided and damaged due to intense jolt during transportation and meanwhile has a refrigeration effect; the temperature of the vegetables can be lowered; the vegetable spoilage speed is decreased; and sufficient time is provided for vegetable transporting.

The invention provides a distance sensor and a 3D image sensor. The distance sensor comprises a photon detection circuit, a first capacitive device and a charge control module. The photon detection circuit is responsive to the reflected photon to generate a charge stop signal, and the reflected photon is obtained by reflecting a photon which is emitted by a light source by a target object. The charge control module is used for controlling the preset charge current to charge the first capacitive device in response to the charge start signal and controlling the charge current to stop charging the first capacitive device in response to the charge stop signal, and the charge start signal is generated when the light source emits photons. The amount of change in the voltage across the first capacitive device in the time window is used to determine the distance between the target object and the distance sensor, the time window is defined by the charge start signal and the charge stop signal. With the adoption of the technical scheme, the measurement precision of the 3D image sensor based on the photon detection technique can be effectively improved.

The invention discloses a new energy and electric power matched city electricity-saving lighting device. The new energy and electric power matched city electricity-saving lighting device comprises a hollow stand column, a camera and a vibrating sensor are arranged at the middle portion of the hollow stand column, and a box door is arranged at the upper portion of the hollow stand column; a controller is arranged inside the box door of the hollow stand column, a rain sheltering top cover is arranged at the top of the hollow stand column, and solar panels are paved at the upper portion of the rain sheltering top cover; a stand column is arranged at the center position of the upper portion of the rain sheltering top cover, a wind power generation device is arranged on the stand column, and an illuminance sensor is arranged at the top end of the stand column; and a set of outer lighting lamp and inner light lamp are arranged at the lower portion of the rain sheltering top cover. By means of the new energy and electric power matched city electricity-saving lighting device, automatic lighting can be achieved, automatic lighting and automatic lighting brightness adjustment can be carried out according to practical situations, and the functions of lighting and rain sheltering are achieved; and meanwhile, the remote warning function is achieved, use is safe and reliable, two kinds of new energy including the solar energy and the wind energy can be used, and electricity saving and environmental protection are achieved.

The invention discloses a charging circuit with high-voltage fast charging. The charging circuit comprises a switch module, a step-down module and a feedback module. The feedback module comprises a first detection resistor connected to an input main circuit, a second detection resistor connected to an output main circuit, and a rechargeable battery charged by the output main circuit. Input ends ofa first signal acquisition circuit, a second signal acquisition circuit and a third signal acquisition circuit are connected in parallel between two ends of the first detection resistor, the second detection resistor and the rechargeable battery. Output ends of the first signal acquisition circuit, the second signal acquisition circuit and the third signal acquisition circuit transmits output information to a control circuit. The switch module is connected between the step-down module and the input main circuit, and the switching state of the switch module is controlled by the control circuit. The invention also discloses a charging method of the circuit. The charging circuit has the advantages of a simple structure, no need for an inductor, high charging efficiency and low heat generation.

The present invention is directed to methods for the automatic charging of an electrochemical electrical energy storage device. Charging may be performed until a pre-assigned voltage increment value measured across the terminals of the storage device is reached. Recurrent periods of charging and rest may be employed, with measurements of voltage taken and voltage increment determined after the passage of an assigned quantity of electrical energy. Automatic completion of the charging process is provided for, irrespective of the design features and number of energy storage devices (e.g., capacitors) in a module, the initial state of charge and / or temperature of the storage device, or the value and / or time instability of the charging current.

The embodiment of the invention discloses a nickel-metal hydride battery pack charging device, which comprises a constant current regulation module, wherein the constant current regulation module comprises a switching power controller, a rectification unit, a detection resistor and a differential amplification unit; a power supply is connected with nickel-metal hydride batteries sequentially by the switching power controller, the rectification unit and the detection resistor; the two ends of the detection resistor are connected to the two input ends of the differential amplification unit respectively; the output end of the differential amplification unit is connected to the switching power controller, and outputs a feedback signal to the switching power controller; and the switching powercontroller controls own operating condition according to the received feedback signal to further regulate the duty cycle of switching in the rectification unit. The device can automatically regulate the output voltage of a charging circuit and stabilize a difference between the output voltage of the charging circuit and the voltage of the nickel-metal hydride battery, thereby stabilizing a charging current. Therefore, the scheme can effectively improve the charging efficiency and reduce overall calorific value.

The invention discloses a charging protection circuit and method and a switching power supply. The charging protection circuit comprises a first sampling module, used for detecting the voltage of a bus capacitor; wherein the bus capacitor is arranged between an input end first line and an input end second line of the switching power supply; an adjustable resistance module, arranged on the second line of the input end and used for keeping the charging current of the bus capacitor stable through the change of the resistance value of the adjustable resistance module; a controller, the input end of the controller being connected with the first sampling module, and the output end of the controller being connected with the adjustable resistor module for adjusting the resistance value of the adjustable resistor module according to the bus capacitor voltage. According to the invention, when the voltage of the bus capacitor rises, the charging resistance is correspondingly controlled to be reduced, so that the charging current is kept stable, and the charging efficiency is ensured.

The present invention discloses a solar power charger. The solar power charger comprises a solar power generation board, a power output mode conversion module, a function switching module, a first output voltage limiting protection module, a second output voltage limiting protection module, a mobile phone charging output module, and a computer charging output module. Through the function switchingmodule, the power output mode conversion module is configured to select to form a current loop between the first output voltage limiting protection module and the mobile phone charging output moduleor between the second output voltage limiting protection module and the computer charging output module. Compared with the prior art, by using the solar power charger provided by the present invention, a stable charging current can be better provided for mobile phones, digital electronic products, notebook computers, and the like in a low-light environment that is not directly exposed to sunlight,and the maximum stable generating current can also be provided under strong light.

The invention provides an energy storage welding machine control system and relates to the technical field of welding machines. The energy storage welding machine control system comprises a DSP main control board, a three-phase thyristor trigger board, a three-phase full-bridge rectifier module, a step-up transformer, an energy storage capacitor group, a voltage detection module and a welding transformer. The step-up transformer boosts the input three-phase alternating current. The three-phase thyristor trigger board triggers the three-phase full-bridge rectifier module under a control commandof the DSP main control board. The three-phase full-bridge rectifier module rectifies the boosted alternating current to the direct current, and the direct current is used for charging the energy storage capacitor group. The voltage detection module detects the voltage of the energy storage capacitor group in real time. When the voltage reaches the preset voltage, the three-phase full-bridge rectifier module is switched to a single-phase rectification working mode to reduce the charging current of the energy storage capacitor group. According to the energy storage welding machine control system, the number of the modules is small, the charging voltage is more accurate, and the system stability is good.

The invention discloses a high-voltage pulse capacitor constant current charging device and method; the device comprises an energy storage module and a discharge control module; the energy storage module comprises a plurality of energy storage units; the discharge control module comprises discharge control units matched with the energy storage units; the energy storage module serves as a power supply charging a load, and the discharge control units connect in series with the energy storage units back to a charging loop, thus realizing constant current charging for the load. The method monitors a charging current, and the energy storage units are connected in series through the discharge control module, thus accurately controlling the load charging voltage, and keeping the constant charging current. The energy storage units serve as the charging power supply of the load, thus solving the problems of high capacity requirement of a power grid access point in the prior art that the charging power is directly from the power grid; the charging control module controls an output of the energy storage module, thus realizing low voltage input and high voltage output without needing a transformer.

The invention relates to a transformer substation intelligent patrol robot automatic charging system, which comprises a charging pile and a patrol robot, and is characterized in that the patrol robotcomprises a patrol device and a charging chassis; the patrol device comprises a first rotary holder, a camera and a wireless communication module; the charging pile comprises a charging base and an electrode assembly. The electrode assembly comprises a first electrode and a second electrode. The first electrode and the second electrode are connected to form an included angle; the first electrode and the second electrode are electrically connected with the charging base. The first electrode and the second electrode can be close to or away from each other to adjust the included angle, the firstelectrode is provided with a first electrode conical surface, the second electrode is provided with a second electrode conical surface, and the first electrode conical surface and the second electrodeconical surface are oppositely arranged; the first electrode conical surface and the second electrode conical surface can be attached to and electrically connected with the left side surface and theright side surface of one end of the charging chassis respectively.

The invention provides an energy storage battery full-life-cycle intelligent charging and discharging maintenance device and a method. The full-life-cycle intelligent charging and discharging maintenance device comprises an HMI control screen, a DSP control mainboard and a maintenance circuit. The HMI control screen is in communication connection with the DSP control mainboard, and the DSP control mainboard is connected with the maintenance circuit; the maintenance circuit comprises an energy storage battery interface, a charging and discharging main circuit, a system protection module, a high-power charging power supply and a load box. Specifically, the energy storage battery interface is connected with the charging and discharging main circuit, the charging and discharging main circuit is connected with the load box, and the charging and discharging main circuit is further connected with the high-power power supply and the system protection module. According to the application, the original working characteristic of only discharging is changed, the charging current is more stable, one Hall sensor can be used for collecting charging and discharging signals, the protection functions of preventing reverse connection of the positive electrode and the negative electrode of the battery, preventing overcurrent, preventing overvoltage, preventing overheating and the like are achieved, and the charging and discharging current is more stable and accurate.

The invention discloses a new energy and electric power matched city electricity-saving lighting device. The new energy and electric power matched city electricity-saving lighting device comprises a hollow stand column, a camera and a vibrating sensor are arranged at the middle portion of the hollow stand column, and a box door is arranged at the upper portion of the hollow stand column; a controller is arranged inside the box door of the hollow stand column, a rain sheltering top cover is arranged at the top of the hollow stand column, and solar panels are paved at the upper portion of the rain sheltering top cover; a stand column is arranged at the center position of the upper portion of the rain sheltering top cover, a wind power generation device is arranged on the stand column, and an illuminance sensor is arranged at the top end of the stand column; and a set of outer lighting lamp and inner light lamp are arranged at the lower portion of the rain sheltering top cover. By means of the new energy and electric power matched city electricity-saving lighting device, automatic lighting can be achieved, automatic lighting and automatic lighting brightness adjustment can be carried out according to practical situations, and the functions of lighting and rain sheltering are achieved; and meanwhile, the remote warning function is achieved, use is safe and reliable, two kinds of new energy including the solar energy and the wind energy can be used, and electricity saving and environmental protection are achieved.

The invention discloses a medium-power and low-cost charge pump charging method, and an SC8551 or lower-cost similar charge pump framework high-voltage direct charging chip is utilized to be matched with a charging head which is commonly used in the market at present, is very low in cost and has a 200mV first-gear voltage regulation range to realize the low-power high-voltage direct charging of about 20W-30W. U1 is an SC8551 or Shanghai southchip same-series charge pump high-voltage direct charging chip, the USB interface voltage, namely VAC, can be detected in real time, when the voltage of the VAC is higher than the required working voltage, the conduction state of Q1 is controlled through an OVP_GATE signal, and the VBUS is clamped within the required voltage range. Q1 is an NMOS transistor and cooperates with U1 to perform overvoltage protection of a USB interface, and Q1 is controlled by U1 to realize the isolation of 200mV change of each gear of the low-cost USB input voltage. According to the invention, the cost and the charging efficiency can be well balanced, and the charging method has great advantages in an interval of about 20-30 watts such that the charging method hasvery high practical value and promotional value.

The invention discloses a high-voltage pulse capacitor constant current charging device and method; the device comprises an energy storage module and a discharge control module; the energy storage module comprises a plurality of energy storage units; the discharge control module comprises discharge control units matched with the energy storage units; the energy storage module serves as a power supply charging a load, and the discharge control units connect in series with the energy storage units back to a charging loop, thus realizing constant current charging for the load. The method monitors a charging current, and the energy storage units are connected in series through the discharge control module, thus accurately controlling the load charging voltage, and keeping the constant charging current. The energy storage units serve as the charging power supply of the load, thus solving the problems of high capacity requirement of a power grid access point in the prior art that the charging power is directly from the power grid; the charging control module controls an output of the energy storage module, thus realizing low voltage input and high voltage output without needing a transformer.

The invention discloses a mobile phone charger based on thermoelectric power generation. The mobile phone charger comprises a thermoelectric power generation module, a boosting module, a driving module, an isolation rectifying circuit and an isolation sampling module, wherein the thermoelectric power generation module utilizes a plurality of serially connected or parallelly connected thermoelectric power generation sheets to generate one low voltage under the condition of a certain temperature difference; the boosting module is connected with the output end of the thermoelectric power generation module to enable the low voltage to be boosted to a high voltage; the driving module is connected with the output end of the boosting module so as to enable the high voltage output by the boosting module to be converted into stable alternating current to be output; the isolation rectifying circuit is connected with the output end of the driving module so as to perform isolation rectification on alternating current output of the driving module to generate stable output to be output through an output interface; the isolation sampling module feeds the output back to the driving module to perform dynamic regulation so as to stabilize the voltage after sampling isolation is performed on the output of the isolation rectifying circuit. The mobile phone charger based on the thermoelectric power generation utilizes the thermoelectric power generation principle, adopts reasonable heat-conduction and heat-dissipation devices and boosting and voltage-stabilizing circuits, achieves the purpose of mobile phone charging, and is particularly suitable for outdoors and field emergent service.

The present application discloses a battery charging method, device, equipment and medium, including: collecting the battery charging state data of the rechargeable battery in each preset time interval in real time at preset time intervals; when collecting any preset time interval If the battery charge state data within the preset time interval is used as the training data set, the battery charge state data is input to the initial neural network model for training, and during the training process, based on each battery charge state data corresponding to The difference between the model output value and the preset threshold value updates the preset network parameters until the difference between the model output value corresponding to the current battery charging state data and the preset threshold value satisfies the preset error condition, then the current preset network The parameter is used as a target parameter; the charging current flowing into the rechargeable battery is controlled according to the target parameter. It can stabilize the charging current, thereby improving battery life and charging safety.

The invention discloses a medium-power and low-cost charge pump charging method. A SC8551 or lower-cost similar charge pump framework high-voltage direct charging chip is utilized to be matched with acharging head which is commonly used in the market at present and is very low in cost and has a 200mV first-gear voltage regulation range to realize low-power high-voltage direct charging of about 20W-30W. U1 is an SC8551 or Shanghai Hainan core same-series charge pump high-voltage direct charging chip, the USB interface voltage, namely VAC, can be detected in real time, when the voltage of the VAC is higher than the required working voltage, the conduction state of Q1 is controlled through an OVP _ GATE signal, and the VBUS is clamped within the required voltage range. Q1 is an NMOS transistor and cooperates with U1 to perform overvoltage protection of the USB interface and is controlled by U1 to realize isolation of 200mV change of each gear of the low-cost USB input voltage. The cost and the charging efficiency can be well balanced, and the method has great advantages in an interval of about 20W-30W so that the method has very high practical value and promotion value.

The invention discloses a controllable self-clamping SensorFET composite lateral power device and belongs to the fields of semiconductor power device technology and power integrated circuit technology. A main switching tube of a power inverter and a SensorFET device are integrated on the same P-type substrate and adopt a shared anode structure, wherein a clamping diode string is arranged between a control electrode of the SensorFET device and the shared anode; and the main switching tube of the power inverter can be a lateral metal oxide semiconductor (MOS) composite device or a conventional MOS device. The provided controllable self-clamping SensorFET composite lateral power device can provide stable charging current for an interior circuit and effectively release avalanche energy, so a transient safety operation area of the SensorFET device is expanded. Meanwhile, due to the connection of a clamping tube and a control grid area, the energy release and clamping time are controlled soas to expand the application of an intelligent power integrated circuit (IC) under a high-avalanche energy environment, such as the field of ignition.

The invention provides an energy storage welding machine control method and a device and relates to the welding machine technology field. The energy storage welding machine control method comprises the following steps of starting an energy storage welding machine and using a boosting transformer to boost a three-phase alternating current; triggering and starting a three-phase full bridge rectification module and rectifying the boosted three-phase alternating current into a direct current; charging an energy storage capacitor group and using the rectified direct current to charge the energy storage capacitor group; and detecting the charging voltage of the energy storage capacitor group in real time, and when the charging voltage reaches a preset voltage value, switching the three-phase full bridge rectification module into a single-phase rectification mode. By using the energy storage welding machine control method, a charging current is stable, charging efficiency is high, and the stability of the welding machine can be effectively increased. By using the energy storage welding machine control device, the charging current is stable, the charging efficiency is high and cost is low.

The embodiment of the invention provides a power supply circuit, device and equipment of a synchronous rectifier, and the power supply circuit comprises a first triode Q1, a second triode Q2, a first diode D1, a second diode D2, a third diode D3, a diode group, a first capacitor C1, a second capacitor C2, a switch module, a comparator and an MOS tube Q3. And stable charging current is generated to charge the power supply capacitor, so that the electric quantity of the power supply capacitor is ensured, and the starting reliability of the synchronous rectifier is improved.

The invention discloses a starting circuit of a PWM chip of an ultra-wide voltage auxiliary power supply, which comprises a voltage switch circuit, a voltage detection circuit and a charging circuit; the voltage switch circuit is composed of a MOS transistor Q1, a resistor R4 and a resistor R5; the voltage detection circuit consists of The MOS transistor Q2, the resistor R7 and the resistor R8 are composed; the charging circuit is composed of the resistor R1 and the resistor R2. The start-up circuit of the ultra-wide voltage auxiliary power supply PWM chip, no matter how the input voltage changes, the charging current of the PWM chip VCC is stable, and the relative change is small; when the power supply fails, the chip can restart and will not enter In the locked state, after troubleshooting, it can be restarted without power-off and restart, especially when working under ultra-high voltage, the circuit loss is much smaller than that of conventional circuits.