61results about How to "Consistent voltage" patented technology

The invention provides an equalization circuit of a battery pack and an equalization method. The equalization circuit comprises the battery pack, a battery management unit, a controllable bidirectional switch array module and an energy transfer module, the energy transfer module comprises a charging unit, a discharging unit and a super capacitor module; the controllable bidirectional switch array module is used for switching on or switching off the electric connection between battery cells and the super capacitor module according to an equalization control command of the battery management unit; the super capacitor module is used for charging and discharging the battery cells which meet equalization conditions; the battery management unit is used for controlling the voltage of the super capacitor module, making the voltage of the super capacitor module to be equal to the average voltage of the battery pack and sending the equalization control command to the controllable bidirectional switch array module to charge and discharge the battery cells which meet the equalization conditions. By means of the equalization circuit of the battery pack, the battery cells in the battery pack are equalized, and the equalization circuit of the battery pack has the advantages of being efficient, low in heat, long in service life and the like.

The invention provides a high-temperature-resisting lithium-ion battery membrane with a plurality of types of coatings and belongs to the technical field of battery membranes. The high-temperature-resisting lithium-ion battery membrane is prepared from a coating membrane composed of a battery membrane with one surface or double surfaces coated with coating slurry; one surface or double surfaces of the coating membrane are coated with slurry additional layers; each slurry additional layer comprises at least one layer of coating composed of the coating slurry. The invention further provides a preparation method of the high-temperature-resisting lithium-ion battery membrane with the plurality of types of coatings; the battery membrane has the advantages that a coating membrane has relatively high safety on a battery; meanwhile, the battery membrane can also be used for resisting high temperature, reducing the shrinkage rate of the membrane under a high-temperature condition and prolonging the service life of the battery; the high-temperature-resisting lithium-ion battery membrane can be used for improving the affinity of the membrane and electrolyte and can guarantee that the membrane is sufficiently swollen through the electrolyte and the service life of the battery is prolonged.

The invention discloses an output voltage isolation sampling circuit of a high-voltage inverter. The isolation sampling circuit is composed of a resistor and divider sampling circuit, a differential amplifier conditioning circuit, an optocoupler isolation sampling circuit, and an operational amplifier conditioning circuit. The input terminal of the resistor and divider sampling circuit is connected with a voltage output terminal of a high-voltage inverter; the differential amplifier conditioning circuit is connected with the resistor and divider sampling circuit electrically; and the operational amplifier conditioning circuit is connected with the optocoupler isolation sampling circuit electrically. The voltage after processing is a voltage meeting a digital-analog signal converter sampling pin of a digital signal processing chip and is sent into a digital-analog signal converter sampling pin of a digital signal processing chip; and the digital signal processing chip carries out sampling and computing processing, so that the system is controlled to monitor the output voltage of the high-voltage inverter in real time and overvoltage protection, undervoltage protection, phase-locked bypass and other functions can be realized.

The invention discloses an electrode structure of a smectic LCD baseplate and a manufacturing method thereof. The electrode structure has the structure that an upper baseplate is provided with strip electrodes consisting of ITO electrodes and strip metal electrodes, wherein each strip electrode is provided with a vertically-conducted metal electrode; a lower baseplate is provided strip electrodes consisting of ITO electrodes and strip metal electrodes, wherein each vertically-conducted connection area is arranged at the clearance beside each strip electrode; and the vertically-conducted metal electrodes of the upper baseplate and the vertically-conducted connection areas of the lower baseplate are arranged correspondingly. The manufacturing method of the electrode structure comprises the following steps: cleaning the baseplates; forming the ITO electrodes; forming metal electrode base courses; and electroplating metal of the top layer to form metal electrodes. The electrode structure manufactured by the manufacturing method is compact, fully takes advantage of effective electrode areas, reduces ineffective electrode areas and can realize continuous splicing of a plurality of LCDs. The electrode structure is suitable for LCDs with larger pixel point areas and larger points among pixels, in particular for smectic LCDs.

This invention discloses a large current electronic switch equalizing in static and dynamic state including a positive bus, a negative bus and thyristors, in which, the positive bus is composed of a positive conduction plate and two positive boards, the negative bus is composed of a negative board and a conduction plate, multiple pairs of thyristors are symmetrically mounted on the positive plate radially, water-cooling plates are mounted on the thyristors with insulation clamp boards set on the positive conduction plate, thyristor triggers are mounted on the clamp boards, quick fuses in the same number to the thyristors are mounted uniformly on the bottom of the negative conduction plate and water-cooling resistors are set between the quick fuses and the corresponding water-cooling plates.

The invention discloses a storage battery internal resistance real-time monitoring device and a monitoring method thereof, and the device comprises a control terminal which is used for carrying out the real-time control of each element in the storage battery internal resistance real-time monitoring device according to the real-time operation instruction of an operator, and is also used for receiving the real-time data detected by each element in the storage battery internal resistance real-time monitoring device, and issuing corresponding maintenance instructions according to the detection data. According to the invention, a battery collector and an internal resistance test unit cooperate with each other, so that the internal resistance value of a storage battery pack can be accurately calculated while the storage battery pack discharges, and the health state of the storage battery pack at the moment can be calculated according to the internal resistance change ratio; and meanwhile, a battery monitoring and maintenance unit is matched, and a maintenance module is used for controlling an auxiliary power supply to charge each single battery of the storage battery pack, so that the voltage of each single battery of the online used storage battery pack tends to be consistent, the capacity of each single battery can be ensured to be fully charged, the service lives of the storage batteries are prolonged, and practical application is facilitated.

The invention belongs to the field of analog integrated circuit design, and discloses a digital self-calibration device and method for a successive approximation type analog-to-digital converter. Thedigital self-calibration device comprises a calibration switch, a comparator, and a logic control unit. The digital self-calibration method comprises the following steps: performing sampling; selecting a first calibration capacitor unit for charge redistribution; logically controlling the lower polar plate of the capacitor to be grounded or the switching between reference voltages, successively approximating the voltage difference brought by charge redistribution of the first calibration capacitor unit, carrying out quantitative calculation through output of the comparator, carrying out calibration calculation according to a quantitative result, enabling an obtained calibration result to serve as a calibration weight value and to be stored in the register for range finding work of the analog-digital converter, and completing calibration of all high-order capacitors repeatedly. According to the method, through multiplexing the calculation circuit, the circuit area is reduced, and high-precision quantification of the analog-to-digital converter is ensured.

The present invention provides a DC voltage conversion circuit and a liquid crystal display device. The DC voltage conversion circuit comprises a voltage dividing unit, a voltage conversion unit, a first subtractor, an adder, a second subtractor, and a pulse width modulation unit. The pulse width modulation unit is used for correspondingly adjusting the duty ratio of the pulse signal outputted when a voltage outputted from the output terminal of the second subtractor is smaller than or greater than a preset voltage difference, and the output voltage and the feedback voltage are increased or decreased until the voltage outputted from the second subtractor output is equal to the preset voltage difference. So as to increase the output voltage when the output current of the DC voltage conversion circuit is increased, and reduce the output voltage when the output current is decreased, and can ensure that the voltage received by the connected electrical components is consistent and the quality of the product is improved.

The embodiment of the invention discloses a multichannel LED drive circuit which comprises a driving circuit, a multichannel LED array circuit and an adjustable resistor array circuit, wherein the driving circuit is used for providing driving currents, the multichannel LED array circuit is connected to the driving circuit, one end of the adjustable resistance array circuit is connected to the multichannel LED array circuit and the other end of the adjustable resistance array circuit is connected to the driving circuit. In the multichannel LED array circuit of all the circuits of the multichannel LED drive circuit, even though brightnesses of LEDs of all branch circuits are different, namely currents Ii running through the branch circuits are different, resistance values DRi in the adjustable resistor array circuit can be respectively adjusted when the branch circuits operate, it is guaranteed that forward direction inputs Di in the LED array circuit can be respectively adjusted and voltages at the position M of the second end keep consistent, and therefore efficiency, flexibility and stability of the multichannel LED drive circuit are improved.

The invention relates to the technical field of charging of a multi-section series battery pack, and aims to provide a charging system for a multi-section series battery pack and a charging method thereof. The charging system comprises a power supply circuit and a battery management circuit, wherein the power supply input end of the battery management circuit is electrically connected with the power supply output end of the power supply circuit; the battery management circuit comprises charging switch circuits, the charging switch circuits are divided into charging input switch circuits and charging output switch circuits, and multiple groups of charging input switch circuits and multiple groups of charging output switch circuits are correspondingly arranged. The invention further discloses a charging method based on the charging system for the multi-section series battery pack. Single batteries in the multi-section series battery pack can be independently charged in a balanced mode inturn in the later period of charging. The equalization charging function can be better provided for the battery pack, the equalization consistency is better, the efficiency is higher, and the charging and discharging cycle life of the battery is not reduced.

The invention relates to a fuel cell power supply management system and method. The fuel cell power supply management system comprises an MCU connected with a plurality of groups of power supply management modules, wherein each group of power supply management modules comprises a DC-DC and a channel selector; the DC-DC is connected with the corresponding fuel cell through the channel selector to compensate the current of the fuel cell; and the MCU acquires the voltage value of the single fuel cell through a voltage measurement module, compares the voltage value of the single fuel cell with a preset threshold voltage, and controls the channel selector corresponding to the DC-DC if the voltage value of the single fuel cell is lower than the preset threshold voltage and there is a non-used DC-DC, connects the DC-DC to the two ends of the cell so as to charge the cell, and sends out alarming if the voltage value of the single fuel cell is lower than the preset threshold voltage and there is non non-used DC-DC, or any DC-DC exceeds the self rated current. The current compensation is carried out on the single fuel cell with relatively poor performance, so that the working voltage of thefuel cell is consistent with that of other series-connected fuel cells, and the purposes of prolonging the service life of the fuel cell, and slowing down the reduction of the output power and reduction of the energy utilization rate are achieved.

The invention relates to a balanced charger based on internal resistance of a battery. A power supply unit (2) provides working power supply for a controller (1), an internal resistance measurement module (3), and power supplies from 1(4-1) to N(4-n); the controller (1) is connected with the power supplies from 1(4-1) to N(4-n); voltage of single electric cores from 1(5-1) to N(5-n) is acquired; on or off of the power supplies from 1(4-1) to N(4-n) is controlled; the controller (1) acquires battery internal resistance of the single electric cores from 1(5-1) to N(5-n), and voltage values and internal resistance values of the single electric cores from 1(5-1) to N(5-n) are displayed via a connected liquid crystal display module (6).

The invention discloses a battery equalizer formed by a multi-winding transformer, which is characterized in that multiple windings with the same turns and different winding directions are arranged on a magnetic core; each winding is serially connected with a switch transistor to form a single-transistor forward circuit or a complementary push-pull circuit to be parallelly connected onto the positive electrode and the negative electrode of each battery, which is as shown as in a figure 1. According to two wiring directions of the windings, switch transistors corresponding to the single-transistor forward circuits are divided into an A group of switch transistors and a B group of switch transistors, the A group of switch transistors and the B group of switch transistors are alternatively conducted and cut off when the circuit works, the interval time is the same, and the switch frequency adopts a high frequency. By using the working feature that the single-transistor forward circuits and the complementary push-pull circuits are combined together, natural magnetic reset of the magnetic core is realized, and voltage balancing of the whole battery pack can also be realized. in order to improve the balancing ability and adapt to balancing of a more number of battery packs, further measures are adopted: all single-transistor forward circuits are changed into the complementary push-pull circuit; and multiple transformers are used, secondary windings are added on the magnetic core of the transformer, and all secondary windings are all parallelly connected according to a principle that homonymous ends are parallelly connected.

The invention discloses a battery equalization device. The battery equalization device comprises a series battery pack, a power electronic switch array, a voltage and current sensor, an isolating type switching power supply, an external power supply switcher and an equalization controller. The equalization controller controls power electronic switches to connect batteries in the battery pack to an equalization charge circuit in turn, detects the states of the batteries and controls the isolating type switching power supply to charge the batteries with low voltage independently. The battery equalization device improves the measurement accuracy of each battery in the battery pack by adopting the bi-directional power electronic switches, constructs a low-impedance current path and reduces waste of energy resources. The battery equalization device can play a role when the battery pack is charged or discharged or left unused.

The invention provides a Micro LED wafer structure and a production method thereof. The production method comprises the steps: 1), providing a single-crystal substrate which includes a first surface and a second surface opposite to each other, and forming an LED structure layer on the first surface of the single-crystal substrate; 2) preparing a plurality of Micro LED arrays on the single-crystalsubstrate based on the LED structure layer; 3) thinning the single-crystal substrate from the second surface, and then forming a lens array on the second surface through a wet etching process; and 4)forming a black matrix on the second surface of the single-crystal substrate, forming a quantum dot array in the black matrix, and correspondingly arranging the quantum dot array, the lens array and the Micro LED arrays. According to the invention, the single-crystal substrate is adopted to grow each layer of the chip so that the dislocation density is greatly reduced. According to the invention,the lens array is formed, the emergent light of each chip on a wafer is converged, optical crosstalk among the chips can be effectively reduced, and a contact effect of the emergent light and the quantum dots is better.

The invention provides a display panel. The display panel comprises a light-transmitting area, a display area, a reset signal line, a first connecting line and a second connecting line. According to the invention, the sub-pixels in the two adjacent rows are connected in parallel, so that the impedance between the pixels is reduced, the voltage on the panel is closer, and the voltage drop on the panel can be reduced. When part of the first connecting lines at the light-transmitting area are disconnected, part of the disconnected rows of sub-pixels of the part of the first connecting lines are indirectly connected through the second connecting lines, then indirect connection of the first connecting lines corresponding to the light-transmitting area is achieved, and the rows of sub-pixels corresponding to the light-transmitting area are connected in parallel, so that the voltage of the whole reset signal in the light-transmitting area is kept consistent, the brightness of the display nearthe light-transmitting area is uniform, and the grade of the panel is improved.