44results about How to "Reduce voltage difference" patented technology

The invention relates to the technical field of lithium battery protection boards, in particular to an intelligent charging and discharging management system based on a lithium battery protection board, and solves the problems that in the prior art, although important guarantee is provided for safe use of a lithium battery, some defects still exist, the protection board fails, and the lithium battery protection board is prone to damage in the long-term use process. And potential safety hazards such as over-charging, over-discharging, short circuit and the like of the battery cannot be effectively prevented. An intelligent charging and discharging management system based on a lithium battery protection board comprises system initialization, real-time battery state monitoring, charging management, discharging management, battery cell balance management, fault diagnosis and early warning, data recording and analysis, and system dormancy and awakening. According to the intelligent charging and discharging management system based on the lithium battery protection board, the service efficiency of the battery is improved, the service life of the battery is prolonged, through accurate electric quantity monitoring and intelligent charging and discharging management, the system can avoid the phenomena of over-charging, over-discharging and over-current of the battery, and therefore the service life of the battery is effectively prolonged.

The invention discloses a circuit, a system and a PCB structure for improving electric leakage performance of a PCB based on an FR-4 board, the circuit and the system are suitable for current measurement of a semiconductor lower than picoampere level, the circuit and the system comprise an equipotential protection layer, the equipotential protection layer is connected with a signal line and is arranged close to a signal end, the equipotential protection layer is used for ensuring that the potential of the equipotential protection layer is the same as that of the signal end, and the equipotential protection layer is connected with the signal line and is arranged close to the signal end; the two ends of the to-be-protected signal line have no voltage difference so as to reduce an electric leakage state; the constant-temperature protection module is connected with the equipotential protection layer and comprises a heating resistance wire, a temperature detection chip, a temperature control unit, an isolation buffer unit and an isolation power supply, under the condition of not increasing too much cost, a common pcb plate FR-4 can be used for realizing a picoampere-level electric leakage test, a dual-guarantee effect is provided, and the cost is reduced. Comprising equipotential protection and heating dehumidification to increase dielectric impedance.

The invention discloses a battery and a full-time equalization method and device thereof, and a controller, and the method comprises the steps: collecting the voltage of each single cell in the battery in real time when the battery is in a charging stage, and carrying out the equalization control of the single cells of the battery through voltage difference equalization if the voltages of all single cells in the battery meet a first equalization condition, and when the battery is in a standing stage after being fully charged, estimating the capacity of each single battery cell in the battery, and if the capacities of all the single battery cells in the battery meet a second equalization condition, performing equalization control on the single battery cells of the battery by using capacity difference equalization. Balancing control is carried out based on the voltage difference in the charging stage, and balancing control is carried out based on the capacity difference in the standing stage after full charging, so that the battery balancing effect is improved.

The utility model discloses an inverter, which comprises an inversion unit, a grid-connected unit and a filtering unit, and is characterized in that the output end of the inversion unit is connected to a power grid through the grid-connected unit and the filtering unit in sequence; the filtering unit comprises a capacitive device, and at least one controllable switch is arranged on a capacitive device branch between any two phases. Through the at least one controllable switch on the capacitive device branch between any two phases, whether the capacitor is put into operation or not can be controlled by controlling the controllable switch; the problem of power consumption caused by the fact that a capacitor is connected with a network when the inverter is in a standby or shutdown state is solved, the service life of the capacitor is prolonged, the voltage difference between two phases is reduced to be within a safe voltage range, the requirement for quick turn-off is met, and the risk of electric shock is reduced.

The embodiment of the invention discloses a pixel circuit and a driving method thereof, a display panel and a display device.The pixel circuit comprises a driving module, a voltage control module and a light-emitting module, the driving module and the voltage control module are connected between a first power line and the first end of the light-emitting module, and the second end of the light-emitting module is connected with a second power line; the driving module is used for driving the light-emitting module to emit light. The voltage control module is used for controlling the voltage of one end of the driving module connected with the voltage control module when the display gray scale is smaller than the preset gray scale. According to the technical scheme provided by the embodiment, the display brightness under the low gray scale can be improved, and the display effect can be improved.

This utility model discloses a dual-battery charging and discharging circuit, including: a control module, a first switch module, a second switch module, a first battery, and a second battery; the control module is connected to the first battery and the second battery respectively, and is used to detect the voltage of the first battery and the second battery; the control module is also connected to the first switch module and the second switch module respectively, and is used to control the conduction and cutoff of the first switch module and the second switch module according to the voltage difference between the first battery and the second battery, so as to realize the switching of charging and discharging modes. In the discharging mode, the high-voltage battery is given priority to be powered or the batteries are connected in parallel to be powered; in the charging mode, the low-voltage battery is given priority to be charged or the batteries are connected in parallel to be charged.

A display panel includes: a display panel test circuit including an open-short test transistor including a gate electrode receiving a test gate signal, a first electrode receiving an open-short test voltage, and a second electrode connected to a data line transmitting a data voltage; and an electrostatic discharge protection circuit including: a first electrostatic discharge diode including a cathode electrode connected to the data line and an anode electrode receiving a first voltage; a first switching element that determines a minimum voltage of the display panel as a first voltage under a first condition, and determines an electrostatic discharge low potential voltage higher than the minimum voltage of the display panel as the first voltage under a second condition; and a second electrostatic discharge diode including a cathode electrode receiving the second voltage and an anode electrode connected to the data line.

The utility model relates to a power semiconductor device. The power semiconductor device comprises a gate contact ring and at least one gate commutated thyristor. The gate commutated thyristor comprises a cathode region and a gate region which are independently arranged in the first base region, and the cathode region and the gate region are electrically connected through the first base region and the gate contact ring; the distances between at least one gate pole commutation thyristor and the gate pole contact ring are different, and the resistance of the gate pole region of each gate pole commutation thyristor is in negative correlation with the distance between the gate pole region and the gate pole contact ring, so that the voltage difference applied to each gate pole commutation thyristor by the gate pole contact ring is reduced, the voltage uniformity of the power semiconductor device is improved, and the reliability of the power semiconductor device is improved. And the turn-off uniformity of the power semiconductor device is improved.

The utility model discloses a motor and electrical equipment, and the motor includes: stator subassembly, stator subassembly includes stator core, rotor subassembly, rotor subassembly includes rotor main body and is worn in rotor main body's rotor shaft, two bearing seats, two bearing seats are arranged respectively in rotor main body's axial both sides, and rotor shaft passes through two bearings and is supported and is installed in two bearing seats, and bearing includes inner ring and outer ring, and inner ring is connected with rotor shaft electricity, and outer ring is connected with bearing seat electricity, capacitor, capacitor, stator core and one of bearing seat series connection, and two bearing seats pass through first conducting part electricity and are connected, so that capacitor, stator core and two bearing seats form equivalent capacitance. According to the utility model embodiment's motor balances the inner ring and outer ring of bearing, effectively reduces the voltage difference of bearing inner ring and outer ring, improves the problem of bearing electric corrosion, is favorable for reducing bearing noise.

This invention relates to the field of energy storage battery fault diagnosis technology, and particularly to an online fault diagnosis and location method, system, and medium for energy storage batteries. The method includes the following steps: during the operation of the energy storage battery, acquiring the terminal voltage signal and temperature parameters of each cell, and detecting the internal resistance parameter of each cell through AC injection; compiling the internal resistance parameter, terminal voltage signal, and temperature parameters into battery operation data; calculating the voltage deviation between the terminal voltage of each cell within the same battery module and the average voltage of the module based on the battery operation data; and controlling the terminal voltage of each cell to gradually maintain it within a stable period based on the voltage deviation; acquiring the terminal voltage of each cell again based on the adjustment, and comparing the voltage deviation before and after adjustment; this invention improves the accuracy and efficiency of energy storage battery fault diagnosis and location through online fault diagnosis and location, providing a reliable basis for the operation and maintenance of energy storage systems.

The embodiment of the utility model provides a lamp-driver integrated driving chip, a display panel and a display device, relates to the technical field of display, and is used for simplifying circuit layout and reducing power consumption under the condition that the area of the lamp-driver integrated driving chip is limited. The lamp-drive integrated driving chip comprises N pixel circuits and a driving circuit. A first power supply end of the driving circuit is connected with a first power supply; each pixel circuit comprises a first sub-pixel module and a second sub-pixel module, the first sub-pixel module comprises at least one red sub-pixel module, and the second sub-pixel module comprises at least one of a green sub-pixel module, a blue sub-pixel module and a white sub-pixel module. The driving circuit comprises N first driving modules and N second driving modules. The input ends of the first sub-pixel module and the second sub-pixel module are connected with the second power supply, the output end of the first sub-pixel module is connected with the first power supply through the first driving module, and the output end of the second sub-pixel module is grounded through the second driving module.

The present invention provides a vertical semiconductor structure of an integrated sampling structure and a manufacturing method therefor. The vertical semiconductor structure of an integrated sampling structure comprises: a vertical semiconductor structure primitive cell, a sampling primitive cell, a control electrode, a first electrode, a second electrode, and a sampling electrode. According to embodiments of the present invention, first, the sampling electrode can sample a voltage difference between the first electrode and the second electrode in real time; a PN junction is formed between a first / second P-type diffusion region and a second N-type base region of the sampling primitive cell, and the PN junction forms a barrier for blocking electron emission of a sampling electrode terminal. Therefore, a voltage signal of the sampling electrode is input to a protection circuit, and the protection circuit can safely and quickly detect whether the vertical semiconductor structure is in a desaturation state while determining that the vertical semiconductor structure primitive cell is in an open state. Secondly, a sampling resistor is connected in series between the sampling electrode and the first electrode, the positive voltage of the sampling electrode increases the height of the barrier, and the stable operation of the sampling primitive cell can be ensured.

The utility model relates to the technical field of audio circuits, and discloses an audio switching circuit and audio device.The audio switching circuit comprises a first audio source input module, a second audio source input module, an audio source selection module and a switching speed adjusting module, the first audio source input module and the second audio source input module are used for providing audio signals, the audio source selection module is used for selecting audio sources, and the switching speed adjusting module is used for adjusting the audio source switching speed of the audio source selection module. The audio switching circuit provided by the utility model can select audio sources and complete switching of the audio sources, and the switching speed adjusting module can adjust the audio source switching speed of the audio source selection module, so that the buffer direct-current level hopping time of the coupling capacitor at the input end is prolonged, the voltage difference between the two ends of the coupling capacitor is small, and the reliability of the audio switching circuit is improved. Therefore, when audio source switching is completed, transient impact on the coupling capacitor is avoided, and finally blasting sound generated by audio source switching is eliminated.

A method for controlling charging of multiple batteries and an electronic device to which the method is applied are provided. The electronic device includes a housing, multiple batteries arranged in the housing, a power management module for controlling the multiple batteries, multiple current limiting ICs for limiting the maximum intensity of the current flowing into each of the multiple batteries, and at least one processor operably connected to the multiple batteries, the power management module, and the multiple current limiting ICs. The at least one processor can set the total charging current output from the power management module, set the individual charging currents flowing into each of the multiple batteries to be proportional to the total capacity of each of the multiple batteries, and recalculate the individual charging currents when the total charging current changes.

The utility model provides a power gating circuit and a chip, which belong to the technical field of semiconductor circuits, and comprise a first gating link used for controlling the chip to be pre-electrified; the first gating link comprises a first control signal input end and a plurality of first gating units, power supply pins of the plurality of first gating units are connected in parallel, switching signals of the plurality of first gating units are connected in series, and the switching signals of the first gating units are connected with the first control signal input end; at least one delay unit is connected in series between every two adjacent first gating units, and the delay units are used for controlling the current change rate in the chip power-on process. According to the utility model, the current change rate generated when the first gating unit in the first gating link is opened is reduced through the time delay unit, and the power supply stability of the whole power supply system is improved.

The utility model discloses a flat wire motor stator, including stator core and stator winding, in the inside wall of stator core along the circumferential even distribution has a plurality of stator slot, every stator slot all along the radial setting of stator core has N slot layer, the utility model discloses can through to each branch's hairpin wire and carry out the even balance of quantity and the wiring of pole pitch balance, reduce the voltage difference existing between branch, thereby reduce the circulation production probability, avoid the influence that motor operating efficiency received.

The application discloses a driving circuit, a driving control method and a display device for reducing the temperature of a driving chip. The driving circuit comprises an independent power supply module and a current control module. The independent power supply module comprises a first power supply circuit and a second power supply circuit which are independent of each other. The first power supply circuit is connected with a positive polarity driving end, and the second power supply circuit is connected with a negative polarity driving end. When the driving chip is working, the first power supply circuit provides driving power for the positive polarity driving end, and the second power supply circuit provides driving power for the negative polarity driving end. The current control module is used for controlling that the current required by the negative polarity driving is provided by the second power supply circuit in the negative polarity driving load stage, and making the current flow through an output buffer circuit inside the driving chip, so as to reduce the voltage difference between the output buffer circuit. The application realizes the temperature reduction by the two-way completely independent power supply, the voltage difference between the output buffer circuit is greatly reduced, the power consumption is reduced under the premise of the unchanged current, and the temperature reduction is realized.

The invention relates to a high voltage ride through protection device and an energy storage system. The energy storage system comprises an energy storage battery and the high voltage ride through protection device. The high voltage ride through protection device comprises a control unit and a controllable boost unit. The control unit is used for collecting bus voltage and power grid voltage of the energy storage system and triggering a control signal according to the bus voltage and the power grid voltage. And the controllable boosting unit performs supplementary boosting on the bus voltage according to the control signal. When the voltage of the power grid is too high, the voltage difference between the bus voltage and the voltage of the power grid can be reduced through supplementary boosting of the controllable boosting unit, and negative effects caused by backward flowing of the energy of the power grid are prevented. Meanwhile, as the controllable boosting unit only needs to process the voltage difference between the bus voltage and the power grid voltage, the processing power of the controllable boosting unit is relatively small, and compared with a DC / DC + DC / AC architecture, the cost is reduced, and the power loss is reduced.

The invention provides an electric driving system, a control method and a vehicle. The electric driving system comprises a first driving system and a second driving system, wherein the first driving system is used for driving a first part of wheels of the vehicle; the second driving system is used for driving a second part of wheels of the vehicle; the battery system comprises a plurality of battery modules, and a first part of the battery modules of the battery system are electrically connected with the first driving system and used for supplying power to the first driving system; a second part battery module of the battery system is electrically connected with the second driving system and is used for supplying power to the second driving system; the first part battery module and the second part battery module are connected in parallel; or, a plurality of battery modules included in the battery system are connected in series, and the power supply voltages of the first part of battery modules and the second part of battery modules are different; and the first part of battery module and the second part of battery module share the same battery module. In this way, power can be dynamically distributed as required.

This application relates to the field of linear voltage regulator circuit technology, and discloses a linear voltage regulator circuit applied to a multi-power-domain system, where the multi-power-domain system includes N power supplies, where N is an integer greater than 1. The linear voltage regulator circuit includes: N parallel power transistor branches, each power transistor branch including a transmission gate and a power transistor connected in series, and the source of each power transistor being connected to a power supply; a control circuit including N control signal output terminals, each control signal output terminal being connected to the control terminal of a transmission gate; the N control signal output terminals output control signals for selecting power transistors; wherein, the transmission gates of the N power transistor branches receive the control signals output by the control circuit and turn on the selected power transistors according to the control signals. The linear voltage regulator circuit provided in this disclosure can prevent the current generated in the power transistor from flowing through the control circuit, thereby reducing the voltage difference between the input and output terminals of the control circuit. This application also discloses a power supply device.

The application discloses a pre-charging method and a liquid crystal display screen. The method comprises the following steps: providing a liquid crystal display screen, wherein the liquid crystal display screen comprises a control unit and a timing unit, and the timing unit is used for outputting a gate driving timing sequence of the liquid crystal display screen according to a control instruction; and providing a first gate driving timing sequence to all pixels of the liquid crystal display screen by using the timing unit to perform 3H charging on the pixels to perform point flipping. The 3H charging is pre-charging in a first H unit time and a second H unit time, actual charging after a third H unit time, and the second H unit time is separated from the third H unit time by 1 H unit time. The point flipping is performed by providing 3H charging to the pixels of the liquid crystal display screen row by row, the voltage difference during the charging of the pixels is effectively reduced, the charging rate is improved, and the display quality is improved.

The utility model relates to a simple two-way current sharing circuit, which comprises a first power supply module, a second power supply module and a shared feedback module, and is characterized in that the power supply output end of the first power supply module and the power supply output end of the second power supply module are combined into a power supply node; the power supply node is connected with a power supply signal input end of the sharing feedback module, a first feedback signal output end of the sharing feedback module is connected with a feedback signal input end of the first power supply module, and a second feedback signal output end of the sharing feedback module is connected with a feedback signal input end of the second power supply module. The sharing feedback module is used for generating a first feedback signal and a second feedback signal, and the precision deviation of the first feedback signal and the second feedback signal is kept in the same numerical range, so that the voltage difference between the power supply modules is effectively reduced, the purpose of current sharing is achieved, and the stability and reliability of the power supply system are improved.

The invention discloses a laminated structure color light-emitting device regulated and controlled by a common grid electrode, and the device comprises a light-emitting pixel point which comprises a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, and each of the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit comprises a first electrode, a light-emitting function layer and a second electrode; a red gate insulation layer is arranged above the red light-emitting unit, a red gate regulation and control electrode is arranged above the red gate insulation layer, and the green light-emitting unit and the blue light-emitting unit are arranged in the same way; a first high-resistance lead is connected between the red grid regulation electrode and the green grid regulation electrode in the same light-emitting pixel point, and a second high-resistance lead is connected between the green grid regulation electrode and the blue grid regulation electrode in the same light-emitting pixel point; the blue grid regulation and control electrodes are uniformly connected to a first point, and the red regulation and control electrodes are uniformly connected to a second point. The integrated structure of the grid regulation and control circuit is effectively simplified.

The utility model discloses a 14-pole motor armature winding structure, a wiring method and a motor, the 14-pole motor armature winding structure comprises double-layer wave windings arranged in 252 stator slots of the motor, and the double-layer wave windings comprise a U-phase winding, a V-phase winding and a W-phase winding; each group of windings comprises a first branch circuit, a second branch circuit, a third branch circuit and a fourth branch circuit, the first branch circuit and the third branch circuit are consistent in bar number and electrical angle, and the second branch circuit and the fourth branch circuit are consistent in bar number and electrical angle; the stator slot comprises an upper layer coil bar slot position and a lower layer coil bar slot position. According to the wiring method of the four-branch special balance branch in the embodiment of the invention, the law that the ratio of the number of magnetic poles to the number of the branches must be an integer is broken through, and the voltage difference between the branches of each phase is greatly reduced through the wiring method.

The utility model relates to the technical field of LED light sources, in particular to a copper bar power supply structure of an LED light source and a line light source lamp. The copper bar power supply structure comprises an LED chip set, a power supply patch set and a copper bar. The LED chip set comprises at least two LED chips arranged in the first direction. The power supply patch group comprises at least two power supply patches arranged in the first direction, the power supply patch group is located on at least one side of the LED chip group, and the power supply patches are electrically connected with the LED chips; the copper bars are attached to and electrically connected with the multiple power supply patches located on the same side and connected with the power source positive electrode or the power source negative electrode. According to the copper bar power supply structure of the LED light source, the plurality of LED chips are supplied with power through the copper bars, and the voltage difference among the LED chips can be reduced, so that the brightness difference among the LED chips is reduced, and the uniformity of overall illumination is improved.

The present invention discloses an electrode, an electrode assembly, a multi-core electrode plate and a forming process. The electrode comprises an electrode block and an embedded conductor. A plurality of electrodes are nested in sequence from the inside out to form an electrode assembly, and the electrode assembly is assembled with a shell to form a multi-core electrode plate. The shell on the multi-core electrode plate is assembled with the electrode after being processed into parts in one piece.

The utility model provides an electric arc suppression circuit for a Type-C fast charging interface, which comprises a power supply circuit, a vibration detection circuit, an MCU (Microprogrammed Control Unit) main control circuit and a Type-C fast charging interface power supply circuit, the output end of the power supply circuit is in power supply connection with the input end of the vibration detection circuit, the input end of the MCU main control circuit and the input end of the TypeC fast charging interface power supply circuit, and the output end of the MCU main control circuit is connected with the input end of the vibration detection circuit. The output end of the vibration detection circuit and the output end of the TypeC fast charging interface power supply circuit are in feedback connection with the power supply circuit, and the output end of the TypeC fast charging interface power supply circuit can receive power end load equipment. The Type-C fast charging interface has the beneficial effects that the possibility that the Type-C fast charging interface generates an electric arc can be reduced, and the energy level of the electric arc can be reduced.

The invention relates to the technical field of power supplies, in particular to a power tube peak absorption circuit, a switching circuit and a charging control method. Comprising an MOS tube, an energy storage module, a current limiting module and an anti-countercurrent module, the input end of the energy storage module is connected to the drain electrode of the power tube, the output end of the energy storage module is connected with the drain electrode of the MOS tube, the source electrode of the MOS tube is connected with one end of the current limiting module, the other end of the current limiting module is connected with the positive electrode of the anti-countercurrent module, and the negative electrode of the anti-countercurrent module is connected to the source electrode of the power tube. The grid electrode of the MOS tube and the grid electrode of the power tube are connected with an external controller. Before the power tube is turned on, the MOS tube in the power tube peak absorption circuit is turned on, the energy storage module of the power tube peak absorption circuit is charged, and after the energy storage module of the power tube peak absorption circuit is fully charged for RC charging time, the power tube is controlled to be turned on, so that the voltage difference between the drain electrode and the source electrode of the power tube can be effectively reduced, and the peak absorption function is realized; the scheme is lower in efficiency loss and lower in cost.

The invention provides a reverse power flow processing method and a cut-through power supply traction power transformation system, and is applied to the cut-through power supply traction power transformation system, and the method comprises the steps: determining the operation condition of the cut-through power supply traction power transformation system according to the current information of one or more traction substations in a plurality of traction substations; determining an adjustment strategy corresponding to the operation condition, and obtaining adjustment parameters required by the adjustment strategy; and according to the adjustment strategy, controlling corresponding equipment in one or more traction substations in the plurality of traction substations to work according to the adjustment parameters. In the working process of the through power supply traction power transformation system, the operation condition of the traction substation is determined according to the current information of the traction substation, and the corresponding adjustment parameters are determined according to the operation condition of the traction substation, so that the corresponding equipment is controlled to work according to the adjustment parameters; the ride-through power generated by the traction substation can be reduced, and the system stability is improved.

The present invention relates to a test transformer with multi-channel voltage output and a manufacturing method thereof, and belongs to the technical field of transformer manufacturing. The technical scheme is: a plurality of insulating cylinders (2) are arranged in the main air channel between the low-voltage coil (1) and the high-voltage coil (3), forming a mixed insulation structure in which air and insulating cylinders are placed alternately, and the multi-layer windings are wound in layers, and each layer of windings is connected outside the high-voltage coil, and the winding (5) and the dry-type grading switch (7) are connected with a cable (6), and the dry-type grading switch is automatically or manually adjusted to the gear position of the required output voltage. The present invention has multiple functions such as multi-channel output voltage, high voltage level, automatic voltage regulation, etc., has good safety, compact structure, and can conveniently realize the output of the required test voltage; the internal field strength between the low-voltage coil and the high-voltage coil is uniform, the insulation distance of the main air channel is reduced, and the size of the transformer is reduced; the air distance between each layer of windings can be reduced, the footprint is small, and environmental protection requirements are met.